Abstract

Disclosed is a rope supporting apparatus. The rope supporting apparatus comprises a bracket (61) and guide parts (62) arranged at two opposite ends of the bracket (61); a guide mechanism (621) is arranged at a first end of a guide part (62); a second end of at least one guide part (62) is fixedly connected to the bracket (61) in a detachable manner; the guide mechanism (621) arranged at the first end of the bracket (61) extends towards the second end of the bracket (61); the guide mechanism (621) arranged at the second end of the bracket (61) extends towards the first end of the bracket (61); and the two guide mechanisms (621) are arranged oppositely. Also disclosed are a tower crane jib, lifting rope anti-falling method thereof and a tower crane. The rope supporting apparatus can reduce a drooping length of a lifting rope and enhance construction safety of the tower crane.

IPC Classes  ?

• B66C 23/62 - Constructional features or details
• B66C 23/66 - Outer or upper end constructions

Abstract

Disclosed is a rotary bearing, comprising a first collar (61a), a second collar (61b), a first gear ring (62), a second gear ring (63), a first ring roller (64), a second ring roller (65), a third ring roller (66), a first drive device (67), a second drive device (68) and a third drive device (69), wherein the first gear ring (62) and the second gear ring (63) are arranged between the first collar (61a) and the second collar (61b), the first collar (61a) and the first gear ring (62) are joined via the first ring roller (64) to form a first counter-rotating surface set, the first gear ring (62) and the second gear ring (63) are joined via the second ring roller (65) to form a second counter-rotating surface set, the second gear ring (63) and the second collar (61b) are joined via the third ring roller (66) to form a third counter-rotating surface set, the second counter-rotating surface set forms an inclined angle in relation to the first counter-rotating surface set and the third counter-rotating surface set, the first drive device (67) is used for driving the rotation of the first gear ring (62) relative to the first collar (61a), the second drive device (68) is used for driving the rotation of the first gear ring (62) relative to the second gear ring (63), and the third drive device (69) is used for driving the rotation of the second gear ring (63) relative to the second collar (61b).

IPC Classes  ?

• F16C 19/54 - Systems consisting of a plurality of bearings with rolling friction
• A62C 27/00 - Fire-fighting land vehicles
• B66C 23/84 - Slewing gear

Abstract

A hydraulic power-assisted steering system comprises a hydraulic pump (1), a check valve (2), an energy accumulator (13), a servo steering control valve (3), a first steering actuator cylinder (4) and an oil tank (5), wherein the servo steering control valve (3) is connected to the hydraulic pump (1) through an oil inlet pipe (6) and connected to the oil tank (5) through an oil return pipe (7); the servo steering control valve (3) is selectively connected to the oil inlet pipe (6) and a rod cavity or a rodless cavity of the first steering actuator cylinder (4); the check valve (2) and the energy accumulator (13) are connected between the hydraulic pump (1) and the servo steering control valve (3); the system further comprises a first direction control valve, a second direction control valve, and a third direction control valve (8, 9, 11); the first direction control valve and the second direction control valve (8, 9) are connected between the servo steering control valve (3) and the rod cavity and between the servo steering control valve (3) and the rodless cavity; the control ports of the first and second direction control valves are connected to the hydraulic pump (1) through a control oil passage (12); the third direction control valve (11) is connected between the control oil passage (12) and the oil tank (5) and used for selectively connecting to the control oil passage (12) and the oil tank (5). Also disclosed is a chassis of an engineering vehicle. The system can effectively lock wheel steering when steering is not needed so that the reliability of the system is improved.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle

Abstract

Disclosed is a support leg tray, comprising a ball seat (1) with a top surface provided with a spherical groove, and a chassis (2) supported at the bottom of the ball seat (1), wherein the ball seat (1) is detachably mounted on the chassis (2), and the chassis (2) comprises a plurality of detachably connected splicing pieces (20). Further disclosed is a crane, comprising the above-mentioned support leg tray, wherein a ball head of a vertical oil cylinder for support legs of the crane is matched with the spherical groove of the ball seat (1). The support leg tray can be handled and positioned rapidly, saving storage space; and the load distribution of the support leg tray can be adjusted and optimized.

IPC Classes  ?

• B66C 23/78 - Supports, e.g. outriggers, for mobile cranes
• B66C 5/00 - Base-supporting structures with legs

Abstract

A suspension grouping valve set of a multi-bridge suspension system, a suspension system and a detection method therefor. The suspension grouping valve set comprises two hydraulic control one-way valves (11, 12) communicating with an oil pipeline (10) of a hydraulic system and provided with opposing oil inlets; a pressure sensor (4) located on the oil pipeline (10) between the oil inlets of the two hydraulic control one-way valves (11, 12), and used for acquiring pressure information about the oil fluid in the pipeline between the oil inlets of the two hydraulic control one-way valves (11, 12); a control valve set used for simultaneously controlling the opening or closing of the two hydraulic control one-way valves (11, 12); an air control device (7) used for controlling the opening or closing of the control valve set; and a controller which is connected by signals to the pressure sensor (4), controls the action of the air control device (7) and judges whether the oil pipeline (10) of the hydraulic system is connected or disconnected according to the pressure information acquired by the pressure sensor (4).

IPC Classes  ?

• B60G 17/00 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load

Abstract

A crane control method, a system and a crane based on image processing are disclosed. The control method comprises: in the double lifting mechanism of a crane, obtaining the image respectively that can reflect the winding state of the ropes wound on the drum of the lifting mechanism; decoding the image obtained and binaryating the image respectively so as to generate two data matrix; comparing the two data matrix so as to judge whether the hook crossbeam inclines; and adjusting the rotating speed of the motor so that the hook crossbeam tends to level when the hook crossbeam inclines. Said technical solution can judge whether the hook crossbeam inclines by processing the image, and adjust the motor rotating speed in case of the tilt so that the hook crossbeam tends to level, thus can avoid the problems caused by the tilt of the hook crossbeam.

IPC Classes  ?

• B66C 13/18 - Control systems or devices
• B66D 1/48 - Control devices automatic
• B66C 13/46 - Position indicators for suspended loads or for crane elements

Abstract

Disclosed is a vehicle centring control system, comprising a pressure oil source (1), a one-way valve (2), a pressure control valve (3), a directional control valve (4), a centring cylinder (5) and an oil tank (6), wherein the pressure control valve (3) is used for controlling the maximum pressure value of oil liquid which passes into a cavity with a rod and a cavity without a rod of the centring cylinder (5); the one-way valve (2) and the directional control valve (4) are successively arranged on an oil inlet passage in which oil flows from the pressure oil source to the centring cylinder (5); and the directional control valve (4) is used for controlling the cavity with a rod and the cavity without a rod of the centring cylinder (5) to be connected to the pressure oil source (1) when the centring cylinder (5) is in a locking state and to be connected to the oil tank (6) when the centring cylinder (5) is in a servo state. Furthermore, the system further comprises a back pressure valve (7) arranged on an oil passage between the directional control valve (4) and the oil tank (6) so as to form a back pressure of the oil liquid in the cavity with a rod and the cavity without a rod of the centring cylinder (5) relative to the oil liquid in a middle cavity in the servo state of the centring cylinder (5). The vehicle centring control system has a simple and reliable control logic and can realize the flexible locking of the centring cylinder and obtain a relatively good centring tendency.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle

Abstract

Disclosed is a proportional steering valve, comprising a directional control valve and a proportional throttle valve (4), wherein the directional control valve is at least provided with an oil inlet port (10), an oil return port (11), a first working port (12) and a second working port (13); an output port (14) of the proportional throttle valve (4) is in communication with the oil inlet port (10), and an input port (15) of the proportional throttle valve (4) is connected to one end of an internal oil inlet channel (23). Further disclosed are a proportional steering circuit comprising the proportional steering valve, a proportional steering system and a vehicle. Functions of flow rate control and direction control are achieved with the aid of the proportional throttle valve and the electronically controlled directional control valve respectively, so that steering is realized by means of combined control. This facilitates increasing the response speed and improving the sensitivity of the steering operation significantly. Costs are relatively low due to utilization of common hydraulic elements and the ability to resist pollution is strong.

IPC Classes  ?

• B05D 5/08 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
• F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors

Abstract

Disclosed are a vehicle frame, a multi-axle vehicle chassis (2) having the vehicle frame and engineering machinery, the vehicle frame comprising a first and second section arranged in a front-back direction, wherein a swinging connection structure for enabling the first section and the second sections to swing up and down relative to each other is provided between the first section and the second section. By dividing the vehicle frame into the first and second section connected to each other and capable of swinging, the chassis has an improved passing ability and is able to adapt to relatively poor road conditions, and the probability that a transmission or running component is damaged is reduced at the same time.

IPC Classes  ?

• B62D 21/18 - Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups

Abstract

Disclosed are a supporting device and cranes comprising the supporting device. The supporting device comprises a lower supporting base (20), an upper supporting base (10), and an elastic element (30), wherein the lower supporting base (20) comprises a supporting portion (21); the upper supporting base (10) is movably supported on the lower supporting base (20); and one end of the elastic element (30) is connected to the supporting portion (21) and the other end of the elastic element (30) is connected to the upper supporting base (10). In the present invention the upper supporting base is movably supported on the lower supporting base, when both forces in a vertical and horizontal direction are applied to a part to be supported due to a flexural deformation, the upper supporting base is pushed to horizontally move relative to the lower supporting base under the action of the force in the horizontal direction such that the part to be supported returns to a state in which the part to be supported is only subjected to the force in the vertical direction, so that the part to be supported can no longer generate flexural deformation and the service life of the part to be supported is prolonged.

IPC Classes  ?

• B66C 23/78 - Supports, e.g. outriggers, for mobile cranes

Abstract

Disclosed are a support leg tray and engineering machinery comprising the same. The support leg tray comprises a support leg tray main body (10) and an elastically retractable elastic rolling support apparatus (20) arranged on a base plate (11) of the support leg tray main body (10), with the elastic rolling support apparatus (20) being retractable into the support leg tray main body (10). According to the support leg tray in the present invention, the structure is simple, the positioning of the support leg tray can be rapid and accurate, and the security of the engineering machinery in an operation process is improved.

IPC Classes  ?

• B66C 23/80 - Supports, e.g. outriggers, for mobile cranes hydraulically actuated
• B66C 23/78 - Supports, e.g. outriggers, for mobile cranes

Abstract

Disclosed are engineering machinery, a main arm thereof, a method for detecting side bending of the engineering machinery main arm, and a method for correcting the side bending of the engineering machinery main arm. The engineering machinery main arm comprises a main body (10) and a bearing mechanism (20) provided at two sides of the main body (10). The bearing mechanism (20) comprises a mounting portion (21) connected to the main body (10), and a telescopic bearing portion, with one end of the bearing portion being connected to the head of the main body (10) and the other end being connected to the mounting portion (21). The engineering machinery main arm further comprises a detecting unit for detecting length information of the bearing portion and a controller for controlling the extension or retraction of the bearing portion. The engineering machinery main arm can use the telescopic bearing portion to support the main body thereof, such that the detection and the correction of the side bending of the main arm can be achieved.

IPC Classes  ?

• B66C 23/64 - Jibs
• B66C 23/36 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes mounted on road or rail vehiclesManually-movable jib cranes for use in workshopsFloating cranes

Abstract

A vehicle frame comprises a pair of longitudinal beams (10) and a cross beam (20) arranged between the pair of longitudinal beams (10); the pair of longitudinal beams (10) are provided with an suspension oil cylinder support (30) respectively; and the two suspension oil cylinder supports (30) are arranged corresponding to the two ends of the cross beam (20) respectively. The parts of the vehicle frame which are provided with the suspension oil cylinder support (30) have good stiffness.

IPC Classes  ?

• B62D 21/04 - Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members single longitudinal type

Abstract

Provided is a transfer equipment for construction machinery vehicles, used to carry the construction machinery vehicle for transfer. The construction machinery vehicle comprises a drive wheel (11), and a working wheel (12); the working wheel is disposed at the front part of the working end (13) of the construction machinery vehicle; the transfer device comprises a vehicle frame (20), a first wheel (31), and a second wheel (32); the vehicle frame is used to load the working end of the construction machinery vehicle during transfer; the first wheel and the second wheel are respectively and pivotally connected to the two sides of the vehicle frame; and under the drive of the drive wheel, the transfer device travels synchronously with the construction machinery vehicle. Also provided is a transfer method for the construction machinery vehicle: using the transfer device to bear the working end of the construction machinery vehicle, and utilizing the drive wheel of the construction machinery vehicle to enable the transfer device to travel synchronously with the construction machinery vehicle, so as to complete the transfer operation. The transfer device is of simple structure, easy operation and low cost, will not cause damage to the ground, and will not cause the mud scraper of the working wheel to fail, while significantly reducing the risk of the whole vehicle tipping during transfer.

IPC Classes  ?

• E01C 19/26 - Rollers thereforSuch rollers usable also for compacting soil self-propelled or fitted to road vehicles

Abstract

A fastening device, a garbage box, and a docking-type garbage truck. The fastening device comprises a connecting arm (1) and a drive cylinder (2). The connecting arm (1) has a first end being fixedly disposed on a first object (3), and a second end being connected to the drive cylinder (2). The drive cylinder (2) drives, through the connecting arm (1), the first object (3) to be urged against or depart from a second object (4). The fastening device further comprises a locking member (5) driven by the drive cylinder (2). After driving the first object (3) to be urged against the second object (4), the drive cylinder (2) drives the locking member (5) to lock the connecting arm (1). Before the first object (3) departs from the second object (4), the drive cylinder (2) drives the locking member (5) to unlock the connecting arm (1). A back door (7) of the garbage box is the first object (3) of the fastening device, and a box body (6) is the second object (4). The locking member (5) driven by the drive cylinder (2) is disposed, so as to solve the problem of unreliable fastening of the object member incurred by the problem of the drive cylinder (2). Further, the fastening device is simple in structure, convenient to operate, and highly practical.

IPC Classes  ?

• B65F 1/14 - Other constructional features
• B65F 3/12 - Conjoint motion of lids, flaps, and shutters on vehicle and on receptacleOperation of closures on vehicle conjointly with tipping of receptacle

Abstract

A differential shell comprises a first shell (10) and a second shell (20) fixedly connected with each other. A first oil port (11) arranged on the first shell (10) penetrates from the outer periphery to the inner periphery along the periphery of the first shell (10); the extension direction of the first oil port (11) deviates from the central line of the first shell (10); a second oil port (21) arranged on the second shell (20) penetrates from the outer periphery to the inner periphery along the periphery of the second shell (20); the extension direction of the second oil port (21) deviates from the central line of the second shell (20); and one of the first oil port (11) and the second oil port (21) is an oil outlet and the other one is an oil inlet. In the differential shell, by improving a lubricating oil port, lubricating oil can be forcibly fed in or discharged from the differential shell, thereby enhancing circulation of the lubricating oil in the differential shell, reducing abrasion of parts in the differential shell, and prolonging the service life of the differential.

IPC Classes  ?

• F16H 57/04 - Features relating to lubrication or cooling
• F16H 57/037 - Gearboxes for accommodating differential gearing
• F16H 48/40 - Constructional details characterised by features of the rotating cases

Abstract

Provided are a pulley mechanism and a rotary drilling rig comprising the pulley mechanism. The pulley mechanism comprises a pulley (1), a pulley frame (2) and a connecting frame (3), the pulley (1) is mounted on the pulley frame (2), the extension direction of the pulley frame (2) is perpendicular to an axis of the pulley (1), the pulley mechanism further comprises a connecting device for connecting the pulley frame (2) and the connecting frame (3), the pulley frame (2) swings around a first axis (AA) and rotates around a second axis (BB) relative to the connecting frame (3) through the connecting device, the first axis (AA) is perpendicular to a plane on which the extension direction of the pulley frame (2) and the axis of the pulley (1) are located, and the second axis (BB) is the extension direction of the pulley frame (2). In this way, the swinging around the first axis can meet a requirement of normal working of the pulley mechanism, and the rotating around the second axis can be adaptive to an oblique tension of a steel wire rope to adjust the location of the pulley frame relative to the connecting frame, so that the steel wire rope almost applies no oblique tension to the pulley.

IPC Classes  ?

• E21B 3/00 - Rotary drilling

Abstract

Provided are a cathead and a rotary drilling rig. The cathead comprises a pulley (1), a cathead basal body (2), and a mounting seat (3), the pulley (1) is mounted on the mounting seat (3), a mounting portion is arranged on the cathead basal body (2), the mounting portion comprises multiple connecting structures, and the mounting seat (3) is selectively connected to different connecting structures of the mounting portion, to be fixedly mounted at different positions of the cathead basal body (2). In this way, when a case where the distance between a drilling rod (9) and a mast (8) needs to be adjusted occurs to the rotary drilling rig, the distance can be adjusted by only adjusting the mounting position of the pulley (1) on the cathead instead of replacing the cathead with a cathead in other sizes. Compared with the manner of replacing the cathead, the workload of dismounting and mounting is greatly reduced, the cost is lowered, and the operation is convenient and fast.

IPC Classes  ?

• E21B 19/02 - Rod or cable suspensions
• E21B 15/00 - Supports for the drilling machine, e.g. derricks or masts
• E21B 3/00 - Rotary drilling

Abstract

Disclosed is a method for detecting vibration parameters in a vibration wheel of a vibratory roller. The method comprises: raising the vibration wheel (2) and keeping it suspended; then driving the vibration wheel (2) to vibrate and detecting the vibration parameters of the vibration wheel (2). Further disclosed is a system for detecting vibration parameters in a vibration wheel of a vibratory roller. The system comprises a support (3) for enabling the vibration wheel (2) to remain suspended, and a detection device for detecting the vibration parameters of the vibration wheel. Because it is not necessary to have the vibration wheel in contact with the ground, the vibration wheel is not affected by its surroundings, the correctness of the measured vibration parameter is ensured, and also the effect on its surroundings such as the ground can be efficiently reduced.

IPC Classes  ?

• G01M 7/02 - Vibration-testing
• G01H 1/12 - Measuring vibrations in solids by using direct conduction to the detector of longitudinal or not specified vibrations

Abstract

Disclosed is a crane super-lift apparatus for a telescopic crane. The apparatus comprises a set of super-lift support rods (150) consisting of N super-lift support rods (151, 152, 153, 154), with N being a natural number greater than or equal to 3, each super-lift support rod having a movable end and a connection end pivoted to a basic boom (141) of the telescopic crane; a first tensioning device connected between the movable end of each super-lift support rod and a lifting boom located above the telescopic boom; and a second tensioning device connected between the movable end of each super-lift support rod and a rotary platform (120) or the tail portion of the basic boom (141). Furthermore, the crane super-lift apparatus comprises a super-far load lifting mode and a super-high load lifting mode. The present invention further comprises a telescopic crane with the crane super-lift apparatus. By varying the arrangement manner of the pull cord and the pull point, the present invention is capable of not only achieving the super-far load lifting mode of the traditional crane but also achieving the super-high load lifting mode that the traditional crane does not have, while the lift performance of the telescopic crane is expanded to a considerable degree by means of adopting the super-high load lifting mode.

IPC Classes  ?

• B66C 23/82 - Luffing gear
• B66C 23/687 - Jibs telescopic
• B66C 23/70 - Jibs assembled from separate sections to form jibs of various discrete lengths
• B66C 23/36 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes mounted on road or rail vehiclesManually-movable jib cranes for use in workshopsFloating cranes

Abstract

Disclosed is a discharge method for a garbage truck. The method comprises moving a garbage bin containing garbage from an initial position to an operating position, with the operating position comprising a first operating position and a second operating position; firstly the rear of the garbage bin is raised so as to enter the first operating position; then the front of the garbage bin is lifted so as to enter the second operating position where the bottom of the garbage bin is inclined in a downward direction towards the rear thereof. Further disclosed is a garbage truck using the discharge method. A lifting mechanism (3) of the garbage truck comprises a lifting oil cylinder (33) and a linkage mechanism (34) joined together. By the co-operation of the lifting oil cylinder (33) and the linkage mechanism (34), the lifting mechanism enables the garbage bin to move from the initial position to the first operating position, and in turn from the first operating position to the second operating position.

IPC Classes  ?

• B65F 3/24 - Vehicles particularly adapted for collecting refuse with devices for unloading the tank of a refuse vehicle

Abstract

Disclosed is a method for controlling a super-lifting system. The method comprises: detecting whether or not a piston rod of a locking oil cylinder (51) has been retracted to a first set position; if it is detected that the piston rod has not been retracted to the first set position, executing a locking oil cylinder (51) retraction operation such that the piston rod of the locking oil cylinder (51) is retracted; if it is detected that the piston rod has already been retracted to the first set position, executing an unlocking oil cylinder (52) extension operation such that the piston rod of the unlocking oil cylinder (52) is extended and executing a cable winding operation on a super-lifting winch (55); and when the piston rod of the unlocking oil cylinder (52) is extended to a second set position, stopping the extension operation on the unlocking oil cylinder (52) and stopping the cable winding operation on the super-lifting winch (55). Further disclosed are an apparatus for controlling a super-lifting system, a control system and engineering machinery. The invention enables automatic locking and unlocking of the super-lifting system, reducing dependency on manual operations.

IPC Classes  ?

• B66C 13/20 - Control systems or devices for non-electric drives
• B66C 13/16 - Applications of indicating, registering, or weighing devices
• B66C 23/72 - Counterweights or supports for balancing lifting couples
• B66C 23/82 - Luffing gear

Abstract

A cargo boom foot section comprises a rotating tower portion (10) and a foot portion (20) being integrated. A lower support seat connecting piece (30) is provided on a lower chord (13) of the rotating tower portion (10). Further disclosed is a tower crane containing the cargo boom foot section. Therefore, the connection gap between a rotating tower and a cargo boom foot can be avoided to overcome impacts caused thereby, and the service life of a cargo boom foot is extended.

IPC Classes  ?

• B66C 23/66 - Outer or upper end constructions
• B66C 23/84 - Slewing gear

Abstract

A method for telescopic follow control of a boom comprises: when a telescopic cylinder actuates a bolt mechanism to move, detecting in real time whether the position of the bolt mechanism is at a high-speed movement region or at a low-speed movement region; at the high-speed movement region, obtaining a high moving speed required for the bolt mechanism, and at a low-speed movement region, obtaining a low moving speed required for the bolt mechanism; calculating a matching rotating speed N required for a motor for driving the telescopic cylinder according to the high moving speed or low moving speed of the bolt mechanism; and setting the matching rotating speed N to a current rotating speed of the motor. Further disclosed is a system for telescopic follow control of a boom, which matches the rotating speed of a motor and the telescopic speed of a bolt mechanism, so as to avoid risk factors caused by manual misoperations, thereby increasing the work efficiency.

IPC Classes  ?

• G05D 13/32 - Governors characterised by fluid features in which the speed of a shaft is converted into fluid pressure using a pump

Abstract

Disclosed are a pin shaft connection structure, mounting and dismounting methods thereof, and a tower crane. The pin shaft connection structure comprises two pin shaft connection ear plates (10), fixedly connected to the ends of a chord (50) and arranged oppositely, and a connection pin shaft (20), arranged inside pin shaft connection holes of the two pin shaft connection ear plates (10). Each of the two pin shaft connection ear plates (10) comprises an upper connection plate (11) arranged above and a lower connection plate (12) arranged below. The upper connection plate (11) and the lower connection plate (12) are laterally connected to the ends of the chord (50), respectively. The connection pin shaft (20) is vertically mounted inside the pin shaft connection ear plate (10). The pin shaft connection structure of the present invention is capable of lowering the height of a cargo boom of the tower crane, lowering the transportation cost, and making dismounting convenient without lowering the structural strength of the pin shaft connection ear plate.

IPC Classes  ?

• B66C 23/66 - Outer or upper end constructions
• F16C 11/04 - Pivotal connections
• F16B 19/02 - Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings

Abstract

A slewing angle detection method for a slewing mechanism comprises: obtaining an actually measured slewing angle of a slewing mechanism; according to a prestored initial slewing model of the slewing mechanism, calculating a theoretical slewing angle of the slewing mechanism; calculating the difference value between the actually measured slewing angle and the theoretical slewing angle, and using the actually measured slewing angle as a detection result when the absolute value of the difference value is less than a set value; otherwise, using the theoretical slewing angle as a detection result. Also disclosed are a slewing angle detection device and detection system for a slewing mechanism, and construction machinery. By comparing an actually measured slewing angle with a theoretical slewing angle, the fault judgment of an angle sensor is achieved. Moreover, under the condition that the sensor generates a fault, a more precise slewing angle can still be obtained, thereby guaranteeing the security of slewing control.

IPC Classes  ?

• G01B 21/22 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapersMeasuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for testing the alignment of axes
• E04G 21/04 - Devices for both conveying and distributing

Abstract

Disclosed are a construction vehicle and a safe steering early warning apparatus and method therefor. The safe steering early warning apparatus comprises: a controller, wherein the controller obtains the resultant force of the gravitational force of the construction vehicle and the centripetal force exerted on the construction vehicle in the driving state and judges whether or not the point of intersection between the straight line of the resultant force and the surface of the ground is in a supported region. When the point of intersection is located in a supported region, the construction vehicle is in a safe state. When the point of intersection is located outside a supported region, the construction vehicle is in an unsafe state. According to the locational relationship between the point where the straight line of the resultant force of the gravitational force and centripetal force of the construction vehicle intersects with the surface of the ground and the supported region of the construction vehicle, it is possible to judge whether or not the construction vehicle is in a safe state, and the driver can perform an appropriate action according to the result of the judgement, thereby avoiding the problem of the vehicle overturning.

IPC Classes  ?

• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
• B62D 131/00 - Load, including height of vehicle dependent on loadState of vehicle vibration damping means
• B60P 3/16 - Vehicles adapted to transport, to carry or to comprise special loads or objects for carrying mixed concrete, e.g. having rotatable drums
• B60T 8/17 - Using electrical or electronic regulation means to control braking

Abstract

Disclosed is a tower crane connecting plate (50), comprising a first connecting hole (51) and also comprising another n connecting holes, wherein n is a natural number greater than 1. The centre of the n-th connecting hole is at a distance dn-1 from the centre of the first connecting hole (51), the positional relationship between each connecting hole satisfying the following condition: d1>d2>d3.....>dn-1. Further disclosed is a tower crane equipped with the tower crane connecting plate (50). Since there are three or more connecting holes and the distances between the first connecting hole and the connecting holes other than the first connecting hole are different, by adjusting the use of different installation holes, the extent to which the crane jib is raised can be conveniently adjusted, thereby achieving stable operation for the tower crane.

IPC Classes  ?

• B66C 23/64 - Jibs
• B66C 23/16 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements

Abstract

Disclosed are an internal climbing frame guided support and fastening apparatus, an internal climbing frame (200) and a tower crane. The guided support and fastening apparatus (300) comprises: a connecting rod mechanism (310), the connecting rod mechanism (310) being pivotally connected to a main body (210); a guide wheel (320), the guide wheel (320) being pivotally installed at a first end of the connecting rod mechanism (310); and an adjusting apparatus (340), the adjusting apparatus (340) being adjustably connected to the main body (210), and comprising a support part (350), wherein the support part (350) is connected to a second end of the connecting rod mechanism (310). The adjusting apparatus can make the guide wheel or support block provided at the two ends of the connecting rod mechanism move to a position matching a main chord of a reference section in order to switch the tower crane between a non-working state and a working state. The invention has the advantages of occupying less space, being simple to operate and having reliable performance.

IPC Classes  ?

• B66C 23/62 - Constructional features or details

Abstract

The present invention provides a tower crane climbing frame and a tower crane including the climbing frame. The tower crane climbing frame comprises a climbing face (10), an insertion face (20) and two connecting faces (30) connecting the climbing face (10) and the insertion face (20), wherein the climbing face (10), the insertion face (20) and the two connecting faces are connected by main chords, and the climbing face (10) and the insertion face (20) each comprise at least one module-like structure. The module-like structures are monolithic and are removably connected to the main chords. The tower crane climbing frame according to the present invention can simplify the installation structure of a climbing frame, reduce the space taken up when transporting the climbing frame, and improve installation efficiency.

IPC Classes  ?

• B66C 23/78 - Supports, e.g. outriggers, for mobile cranes

Abstract

Engineering machinery and a landing leg positioning and supporting device thereof. The landing leg positioning and supporting device comprises: an oil cylinder (30), the oil cylinder (30) being mounted on a chassis (10) of the engineering machinery; a supporting rod (40), one end of the supporting rod (40) being pivotably connected to a piston rod of the oil cylinder (30), and the other end being pivotably connected to a landing leg (20) of the engineering machinery; and a locking piece (50), the locking piece (50) locking the piston rod to at least one position which is relatively fixed with the chassis (10). The supporting rod (40) is driven by the landing leg (20) to swing, position, and support the landing leg (20), so that the oil cylinder (30) only has a function of rotation, thereby reducing the size of the oil cylinder and reducing the cost. In addition, the landing leg positioning and supporting device avoids the over-positioning problem of the supporting rod (40) and the oil cylinder (30), so that the length of the supporting rod (40) does not need to be adjusted, having the advantages of convenient operation and high work efficiency.

IPC Classes  ?

• B66C 23/80 - Supports, e.g. outriggers, for mobile cranes hydraulically actuated

Abstract

Disclosed is a valve bank (1), having a pressure oil port (1P), an oil returning port (1T), a first working oil port (1A), and a second working oil port (1B), and comprising a four-way reversing valve (11) and a two-position two-way reversing valve (12). A first working oil port (11A), a second working oil port (11B) and a pressure oil port (11P) of the four-way reversing valve communicate with the first working oil port (1A), the second working oil port (1B) and the pressure oil port (1P) of the valve bank respectively. A working oil port (12A) and a pressure oil port (12P) of the two-position two-way reversing valve communicate with an oil returning port (11T) of the four-way reversing valve and the oil returning port of the valve bank respectively. The pressure oil port of the two-position two-way reversing valve communicates with the working oil port in one working position of the two-position two-way reversing valve, and the working oil port of the two-position two-way reversing valve unidirectionally communicates with the pressure oil port in another working position of the two-position two-way reversing valve. Also disclosed are a hydraulic control loop and an auxiliary device for assembling or disassembling parts. By using the valve blank, multiple execution mechanisms (39a, 21) can share one proportional reversing valve (3) to realize independent control.

IPC Classes  ?

• F15B 15/00 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith
• F15B 13/042 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure

Abstract

A rotatable engineering machinery rotation constant power control method comprises step one (101): calculating rotation reference power P=M×g×V, M being mass of a lifted weight, g being a gravitational acceleration constant, and V being rotation linear velocity of the weight; step two (201): calculating rotation velocity of a rotation platform n=P×9.549/Trated, Trated being a rated output torque of a reduction box connected with a rotation driving device; and step three (301): controlling actual rotation velocity of the rotation platform (4) to be equal to the rotation velocity n of the rotation platform. In addition, the present invention further provides a rotation a constant power control system and rotatable engineering machinery used for implementing the control method. The control method and the control system of the present invention can achieve the following control objectives: during the weight rotation operation, the rotation velocity is fast with a light or close weight and is slow with a heavy or far weight according to different weights and working amplitude, hence guaranteeing high efficiency of rotation operation and maximum utilization of structural strength of the whole machine.

IPC Classes  ?

• B66C 13/20 - Control systems or devices for non-electric drives
• B66C 23/94 - Safety gear for limiting slewing movements

Abstract

A hoist comprises a first car body (11) and a second car body (12) that are connected to each other in a disassemblable manner. The first car body (11) comprises a hoisting mechanism (110) and a first power source (111) for driving the first car body. The second car body (12) comprises a second power source (120) for driving the second car body. An accessory axle device of the hoist can increase the driving power of the hoist.

IPC Classes  ?

• B66C 23/38 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes mounted on road or rail vehiclesManually-movable jib cranes for use in workshopsFloating cranes with separate prime movers for crane and vehicle

Abstract

Disclosed are a method and an apparatus for controlling dispensing of finished material in a dry powder mortar mixing station, for improving the ease of use of the dry powder mortar mixing station. The control method comprises: receiving a material discharge command; according to the correlation between a stored material discharge path and the started state of material discharge equipment, determining first material discharge equipment to be started corresponding to a first material discharge path carried in the material discharge command; setting the first material discharge equipment in a started state, and discharging finished material in the dry powder mortar mixing station by means of the first material discharge equipment started.

IPC Classes  ?

• B28C 7/16 - Discharge means
• B28C 7/02 - Controlling the operation of the mixing

Abstract

An arm joint for a truss arm, a truss arm, and a crane with a truss arm. The arm joint (1) for a truss arm comprises an arm joint body (10), a top connection structure (12) disposed on the top of the arm joint body (10), and a bottom connection structure (14) disposed on the bottom of the arm joint body (10), the arm joint body (10) being a truss structure and having an extending axis. The arm joint (1) for a truss arm further comprises pull plates (16) disposed on two sides of the arm joint body (10), the pull plate (16) extends from the upper part to the lower part of the arm joint body (10), and the extending direction is almost parallel to the extending axis of the arm joint body (10). The truss arm can bear pressure and tension.

IPC Classes  ?

• B66C 23/70 - Jibs assembled from separate sections to form jibs of various discrete lengths

Abstract

A super-lift device of a crane and a crane using the super-lift device. The super-lift device (7) comprises a super-lift mast (78) and a winch (76) mounted on the super-lift mast. A cantilever crane system of the crane is provided with a cantilever crane pulley device (1), and a steel wire rope (2) guided out from the winch passes through the cantilever crane pulley device and is guided back to the super-lift mast. The super-lift device further comprises a compensation device, used for adjusting the tightness of the steel wire rope. The steel wire rope guided back to the super-lift mast is connected to the compensation device. The super-lift device is provided with the compensation device used for adjusting the tightness of the steel wire rope, accordingly, the steel wire rope can always be tightened by means of adjusting the tightness of the steel wire rope, loosening and cluttering of the steel wire rope can be effectively prevented, and the length of the steel wire rope and the cantilever crane system of the crane may be accurately controlled, thereby improving the lifting performance of the crane.

IPC Classes  ?

• B66C 23/72 - Counterweights or supports for balancing lifting couples

Abstract

Disclosed are a movement control device, a method, a system and an engineering machinery of a hydraulic actuating mechanism. The movement control device comprises a control unit obtaining a current movement position and the current oil pressure of the hydraulic actuating mechanism. When a difference value of the current movement position and an extreme movement position of the hydraulic actuating mechanism is smaller than a position setting value and a difference value of the current oil pressure and a reference oil pressure is larger than a pressure setting value, the control unit controls the hydraulic actuating mechanism to stop. By the cooperation of a position detecting unit and a pressure detecting unit, whether the hydraulic actuating mechanism moves to the extreme movement position or not can be accurately recognized, and therefore the problem that an existing hydraulic actuating mechanism can not be stopped reliably and timely is solved, thereby avoiding damage to the hydraulic components and mechanical components.

IPC Classes  ?

• F15B 21/08 - Servomotor systems incorporating electrically- operated control means
• G05D 3/12 - Control of position or direction using feedback

Abstract

Provided are a cooling system of a hydraulic traveling machine, a cooling method of the cooling system and a hydraulic excavator. The cooling system of the hydraulic traveling machine comprises an engine cooling system (10) and a hydraulic oil cooling system (20) which are independently arranged. The engine cooling system (10) comprises an integrated radiator (30) for heat dissipation of an engine (11) and an engine fan (12) for cooling the integrated radiator (30). The hydraulic oil cooling system (20) comprises a hydraulic oil cooler (41) for heat dissipation of the hydraulic oil of a working system, and a hydraulic oil cooling fan (21) for cooling the hydraulic oil cooler (41). The cooling system of the hydraulic traveling machine solves the problem of excessively large areas of the single engine cooling fan and the single integrated radiator, saves system energy and reduces noise.

IPC Classes  ?

• F01P 5/02 - Pumping cooling-airArrangements of cooling-air pumps, e.g. fans or blowers

Abstract

Disclosed are a pin connection structure, a drag rod and a tower crane. The pin connection structure comprises: two first connecting plates (10) placed in parallel to each other, with a first pin mounting hole provided on the first connecting plates (10), which first pin mounting hole comprises a first mounting section (11) and a first curved section (12) at a first end of the first mounting section (11); a second connecting plate (20) provided between the first connecting plates (10), with a second pin mounting hole provided on the second connecting plate (20), which second pin mounting hole comprises a second mounting section (21) and a second curved section (22) at a first end of the second mounting section (21); and a pin (70) provided in a mounting hole formed by the first curved section (12) and the second curved section (22). The pin connecting structure can make the pin easily fit into a pin hole, and has a simple structure, is convenient to use, is easy to install and effectively increases working efficiency.

IPC Classes  ?

• F16B 7/20 - Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using bayonet connections
• B66C 23/62 - Constructional features or details

Abstract

Disclosed is a hydraulic system (100), comprising an oil tank (110), a hydraulic cylinder (108), a liquid-controlled reversing valve (106), a control apparatus, an apparatus providing a control oil supply and a pressure-sensing apparatus. When the pressure in a rod-less cavity (108a) of the hydraulic cylinder (108) is detected by the pressure-sensing apparatus to be greater than a preset value, the control apparatus controls the apparatus providing a control oil supply to provide a control oil supply to turn on the liquid-controlled reversing valve (106), supplying some of the oil in the rod-less cavity (108a) to a cavity with a rod (108b). Further disclosed are a method of controlling the hydraulic system (100) and an excavator with the hydraulic system (100).

IPC Classes  ?

• F15B 11/02 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
• E02F 9/22 - Hydraulic or pneumatic drives

Abstract

An encoder fault detection method. An encoder is provided with a first proximity switch (SQ-A) and a second proximity switch (SQ-B) for angle measurement. The method comprises: according to output signals of a first proximity switch (SQ-A) and a second proximity switch (SQ-B), obtaining the respective number of pulses of the first proximity switch (SQ-A) and the second proximity switch (SQ-B) (S302); determining fault information of the encoder according to the obtained numbers of pulses (S304). The method solves the problem in the prior art of the poor reliability of an encoder fault detection mechanism. Meanwhile, this detection mechanism can be implemented without the cooperation of a third proximity switch on the encoder, thereby reducing the cost of the encoder. Also disclosed are an encoder fault detection device and an encoder fault detection system.

IPC Classes  ?

• G01D 18/00 - Testing or calibrating apparatus or arrangements provided for in groups
• G01D 5/36 - Forming the light into pulses
• G01D 5/00 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable

Abstract

A cooling system of a hybrid hydraulic excavator, comprising an engine (10); an engine fan (11) in driving connection with the engine (10); an integrated heat dissipation system (20) disposed in the air outlet direction of the engine fan (11) and comprising a cooling device (24); a pump body (30) serially connected with the cooling device (24) via a pipe and driving a cooling medium to circulate in the pipe; and a cooled device (40) serially connected on the pipe between the pump body (30) and the cooling device (24). Also disclosed is an excavator having the cooling system.

IPC Classes  ?

• E02F 9/20 - DrivesControl devices
• F01P 5/06 - Guiding or ducting air to or from ducted fans

Abstract

Disclosed are a precompressor and a rear-mounted compression type dust cart adopting the precompressor. The precompressor comprises a casing, a sliding plate (4) and a sliding plate hydro-cylinder (6). The sliding plate is mounted on a sliding plate slide way (7) at the inner side of the side plate of the casing through a sliding block (10, 14). One end of the sliding plate hydro-cylinder is hinged on the sliding plate, and the other end thereof is hinged at the inner side of the side plate of the casing. The rear-mounted compression type dust cart adopting the precompressor changes the operating mode of the sliding plate hydro-cylinder which is operated with a rodless cavity into a pushing mode by changing the direction and the position of the sliding plate hydro-cylinder and/or the structure of the casing of the precompressor, keeps the advantages of the internally-installed sliding plate hydro-cylinder and the externally-installed sliding plate hydro-cylinder, improves the operating speed, and reduces the system power.

IPC Classes  ?

• B65F 3/14 - Vehicles particularly adapted for collecting refuse with devices for charging, distributing, or compressing refuse in the interior of the tank of a refuse vehicle

Abstract

Disclosed is a connecting beam assembly comprising two first arm sections (100) and two second arm sections (200) arranged so as to intersect. The ends of the two first arm sections (100) and the two second arm sections (200) are connected at a first intersecting position, wherein the two first arm sections (100) are adjacent and are of an adjustable length. Further disclosed is a truss arm system having the connecting beam assembly. The assembly enables the stress bearing capacity of the truss arm to be increased, increases the overall stability of the truss arm system, has a simple structure, is easy to adjust, and has a relatively high precision of installation while being convenient to install.

IPC Classes  ?

• B66C 23/70 - Jibs assembled from separate sections to form jibs of various discrete lengths

Abstract

Disclosed are a hydraulic control system for unwinding rope and a hydraulic control system for winding rope, both comprising an oil pump (101), a first reversing valve (102), a second reversing valve (103), a first motor (106), a second motor (107) and a control unit. The oil pump (101) is connected to an oil supply for the system, the first reversing valve (102) and the second reversing valve (103). The first reversing valve (102) and the second reversing valve (103) are respectively connected to the first motor (106) and the second motor (107). The hydraulic control system for unwinding rope further comprises a rope unwinding unit (105), wherein the rope unwinding unit (105) comprises a first balancing valve set and a second balancing valve set. The hydraulic control system for winding rope further comprises a rope winding unit (104), wherein the rope winding unit (104) comprises a first pressure regulation valve set and a second pressure regulation valve set. The control unit is used for controlling the first reversing valve (102), the second reversing valve (103), the rope unwinding unit (105) and/or the rope winding unit (104). Further disclosed is a crane comprising the hydraulic control systems for unwinding rope and for winding rope. In the hydraulic control systems, two motors working in cooperation can reliably achieve non-linear synchronization of rope unwinding and rope winding by two hoists, preventing the ropes from becoming tangled, facilitating debugging by an operator, and making a saving on costs.

IPC Classes  ?

• B66D 1/44 - Control devices non-automatic pneumatic or hydraulic
• B66C 13/20 - Control systems or devices for non-electric drives

Abstract

Disclosed are a rotating structure in a vehicle and a construction vehicle. The rotating structure in a vehicle comprises: a box body (10); an aperture-shaped support part (20), with the aperture-shaped support part (20) comprising a plurality of mesh holes (21), each mesh hole (21) being encircled by a plurality of support plates (22) to form a polyhedron, and the number of sides of the polyhedrons being greater than or equal to five; and a connecting plate (30), the aperture-shaped support part (20) being connected to the box body by means of the connecting plate (30). By means of the cellular aperture-shaped support part (20), the present structure increases the bending and torsional strength and stiffness of the rotating structure in the vehicle, reduces the flexural deformation of the vehicle frame during operation, improves the problem of uneven stress distribution on internal support plates of the rotating structure in the vehicle, and increases bearing capacity.

IPC Classes  ?

• B66C 5/00 - Base-supporting structures with legs
• B66C 23/84 - Slewing gear

Abstract

Disclosed is a control system for slewing gear, comprising: an electric motor (14); a brake apparatus (15); a control device (11) for outputting a first actuate pressure-regulation control signal and a second actuate pressure-regulation control signal according to a slewing gear actuation signal entered, and outputting a rated operating voltage control signal and a speed-regulation pressure-regulation control signal according to a slewing gear speed-regulation signal entered; a first pressure-regulating device (12) for adjusting the input voltage of the electric motor according to the first actuate pressure-regulation control signal entered and adjusting the input voltage of the electric motor to the rated operating voltage according to the rated operating voltage control signal entered; a second pressure-regulating device (13) for adjusting the input voltage of the brake apparatus according to the second actuate pressure-regulation control signal entered and adjusting the input voltage of the brake apparatus according to the speed-regulation pressure-regulation control signal entered. In the present invention, the operating speed of the slewing is mainly adjusted by the second pressure-regulating device (13), the speed regulation is smoother, the control method is simple, and the self-adaptability and stability of the slewing gear control system are greatly improved.

IPC Classes  ?

• H02P 27/00 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
• B66C 13/22 - Control systems or devices for electric drives
• B66C 23/84 - Slewing gear

Abstract

A supporting device and an engineering machinery vehicle. The supporting device (20) comprises: a telescopic outrigger (201), a vertical cylinder, a horizontal cylinder, a rotating outrigger (203), a rotating outrigger cylinder, and a swing drive unit (204). The vertical cylinder comprises a vertical piston rod (2072) and a vertical cylinder barrel (2071) fitted with each other; the vertical cylinder is vertically connected to a first end of the telescopic outrigger (201). The horizontal cylinder comprises a horizontal piston rod (2082) and a horizontal cylinder barrel (2081) fitted with each other; a first end of the horizontal cylinder is horizontally connected to the telescopic outrigger (201); a first end of the rotating outrigger (203) is rotatably connected to the telescopic outrigger (201). The rotating outrigger cylinder comprises a rotating outrigger cylinder piston rod (2062) and a rotating outrigger cylinder barrel (2061) fitted with each other; the rotating outrigger cylinder is vertically connected at a second end of the rotating outrigger (203), and the swing drive unit (204) is vertically connected at the rotating outrigger (203) and is used for controlling the rotation of the rotating outrigger (203). By means of the mode, the engineering machinery vehicle utilizes the combined action of the telescopic outrigger (201) and the rotating outrigger (203) to increase an outrigger span, so the anti-tipping capability and the operation stability of the engineering machinery vehicle are improved.

IPC Classes  ?

• B60S 9/10 - Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure

Abstract

Disclosed are a controller area network (CAN) bus redundancy system and a redundancy switching method and device, which are used to increase the transmission efficiency of a CAN bus redundancy system. The CAN bus redundancy system comprises at least two main buses and at least one standby bus, wherein a first main bus is connected to a first port of each first function node so as to transmit information corresponding to the relevant function of each first function node; a second main bus is connected to a second port of each second function node so as to transmit information corresponding to the relevant function of each second function node; and the standby bus is connected to a third port of each first function node and/or a fourth port of each second function node so as to transmit information corresponding to the relevant function of a function node which encounters a communication fault when the function node connected to the standby bus and the corresponding main bus encounter a communication fault.

IPC Classes  ?

• H04L 1/22 - Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Abstract

Disclosed is a combination of suspension systems, comprising a first suspension system, a second suspension system and a disconnection valve block. The first suspension system and the second suspension system are provided respectively on a different chassis of the same multiple-axle vehicle. The disconnection valve block is connected in series to the first suspension system and the second suspension system such that the first suspension system and the second suspension system are divided into two sets or integrated into one. In addition, each of the first suspension system and the second suspension system can further comprise suspension assemblies and disconnection valve blocks connected in series to these suspension assemblies. Therefore, by controlling the on/off switch of each disconnection valve block, the grouping of suspension assemblies can be flexibly controlled by a method of grouping according to the centre of gravity or the load of the whole vehicle, achieving separable and integrative control of the suspension system of the composite chassis, and providing a new concept for split suspension control of a chassis. In addition, the invention also relates to a multiple-axle chassis and a multiple-axle vehicle adopting the combination of suspension systems.

IPC Classes  ?

• B60G 17/00 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
• B60G 21/06 - Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid

Abstract

Disclosed are an oil line control apparatus (100) and engineering machinery. A first reversing valve (110) of the oil line control apparatus is connected with an actuating mechanism; a first control valve (160) is connected to the first reversing valve via a first channel (150); and an oil storage unit (130, 140) is connected to the actuating mechanism and to the first reversing valve. In a first state, a pressure oil outputted by a pressure source successively passes through the first control valve, the first channel, and the first reversing valve and then enters the actuating mechanism, and oil returned by the actuating mechanism is housed in the oil storage unit. In a second state, the return oil housed in the oil storage unit flows back to the oil tank by successively passing through the first reversing valve, the first channel and the first control valve. The oil line control apparatus is able to temporarily store return oil from the actuating mechanism by means of the oil storage unit. When the actuating mechanism suspends operation, return oil temporarily stored thereby is released, thus only one oil line is required to achieve the functions of oil intake and oil return, thereby reducing the complexity and cost of the apparatus and improving the reliability and maintainability of the apparatus.

IPC Classes  ?

• F15B 1/02 - Installations or systems with accumulators
• F15B 15/00 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith
• F16K 11/00 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid

Abstract

A bearing pedestal (1) comprises a cylindrical part (10) and a fixed part (12). The cylindrical part (10) has an outer wall (101) and an inner wall (102). The inner wall (102) of the cylindrical part (10) forms a bearing-containing cavity (103). The fixed part (12) radially extends outward from the outer wall (101) of the cylindrical part (10). The bearing pedestal (1) also comprises an oil baffle plate (16), a plurality of rib plates (14), and a plurality of oil-guiding plates (18). The oil baffle plate (16) extends outward from the outer wall (101) of the cylindrical part (10). The rib plates (14) are arranged between the oil baffle plate (16) and the outer walls (101) of the fixed part (12) and the cylindrical part (10). The oil-guiding plates (18) are arranged between the fixed part (12) and the oil baffle plate (16), and are connected to the rib plate (14) sides which are not connected to the outer wall (101) of the cylindrical plate (10). The oil-guiding plates (18), the outer wall (101) of the cylindrical part (10), the fixed part (12), and the oil baffle plates (16) form imperfectly-sealed oil-storing cavities (19). A plurality of oil-guiding holes (104) is arranged in a penetrating state between the outer wall (101) and the inner wall (102) of the cylindrical part (10). The oil-storing cavities (19) communicate with the bearing-containing cavity (103) through the oil-guiding holes (104). A road roller vibration wheel is provided with the bearing pedestal (1). By means of the bearing pedestal (1) and the road roller vibration wheel with the bearing pedestal (1), a large amount of lubricating oil can be provided for a bearing, thereby solving a heat dissipation problem of the bearing.

IPC Classes  ?

• E01C 19/28 - Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
• F16C 37/00 - Cooling of bearings

Abstract

A method for controlling jib retraction. A control device (520) acquires current position state information of a jib through a measurement device (510), determines, according to at least one parameter value of the current position state information, a position segment of the jib, and drives an execution device (530) to execute a retraction strategy corresponding to the position segment. Further provided are a device and a system for controlling jib retraction, and a vehicle for jib retraction. The method for controlling jib retraction and the control structure are capable of automatically operating, thereby increasing the operation efficiency.

IPC Classes  ?

• E06C 5/00 - Ladders characterised by being mounted on undercarriages or vehiclesSecuring ladders on vehicles
• A62C 27/00 - Fire-fighting land vehicles

Abstract

A vibration control method for controlling the coupled vibration of a tower crane-cable bet tower structure is applied to a tower crane-cable bet tower structure comprising an attachment device. A stay bar (30c) of the attachment device (30) is fixedly connected between a tower crane (10) and a cable bet tower (20). The method comprises the steps of: collecting excitation response signals of the coupled vibration of the tower crane-cable bet tower structure; selecting a vibration control type in accordance with the intensity information about the excitation response signals, the vibration control type comprising active vibration control and passive vibration control, and a vibration control device (30d) on the stay bar (30c) applying an active control force which is opposite to the vibration direction to the stay bar when selecting active vibration control; and the vibration control device (30d) on the stay bar (30c) applying a passive control force which is opposite to the vibration direction to the stay bar when selecting passive vibration control. The vibration control method has a marked effect of vibration reduction and a higher degree of intelligence.

IPC Classes  ?

• E01D 21/00 - Methods or apparatus specially adapted for erecting or assembling bridges
• E04B 1/98 - Protection against other undesired influences or dangers against vibrations or shocksProtection against other undesired influences or dangers against mechanical destruction, e.g. by air-raids
• F16F 15/027 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using fluid means comprising control arrangements
• B66C 23/20 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes with supporting couples provided by walls of buildings or like structures
• B66C 13/18 - Control systems or devices
• B66C 13/22 - Control systems or devices for electric drives
• B66C 23/64 - Jibs

Abstract

Disclosed are an aggregate premixing apparatus (30) and an asphalt mixture stirring device. The aggregate premixing apparatus comprises a shell (31) and a stirring unit (32) disposed in the shell (31). The shell (31) comprises an inner chamber (310) as well as a feeding port (312) and a discharging port (314) that are in communication with the inner chamber (310). The inner chamber (310) comprises a first inner chamber area and a second inner chamber area. The stirring unit (32) comprises a rotating shaft (320) crosswise and rotatably arranged in the shell (31), a first blade unit (321) arranged on a first shaft section of the rotating shaft, and a second blade unit (322) arranged on a second shaft section of the rotating shaft. The first blade unit (321) and the second blade unit (322) can rotate following the rotating shaft and are respectively corresponding to the first inner chamber area and the second inner chamber area of the shell (31). During a working process, when the first blade unit (321) and the second blade unit (322) rotate following the rotating shaft, the first blade unit (321) drives a part of aggregate in the first inner chamber area to the second inner chamber area, and the second blade unit (322) stirs the aggregate in the second inner chamber area.

IPC Classes  ?

• B01F 7/00 - Mixers with rotary stirring devices in fixed receptacles; Kneaders
• B01F 3/18 - Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed solid with solids
• B01F 5/00 - Flow mixers; Mixers for falling materials, e.g. solid particles
• B01F 15/00 - Accessories for mixers

Abstract

Thermal regeneration equipment (1) and a combustion device for asphalt mixture. The combustion device comprises a combustor (20) and a draft tube (30) sleeved on a nozzle (21) of the combustor (20); the draft tube (30) is used for guiding flame generated by the combustor (20) and for introducing cooling gas to form a layer of high-speed gas curtain around an outer ring of the flame. The draft tube (30) is added to the combustion device for introducing the cooling gas to form a layer of high-speed gas curtain around the outer ring of the flame, hence reducing radiation aging of an object being heated by high-temperature flame.

IPC Classes  ?

• F23G 7/06 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of specific waste or low grade fuels, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
• E01C 19/08 - Apparatus for transporting and melting asphalt, bitumen, tar, or the like

Abstract

A control method for a wall washing device comprises: detecting a first measurement value of a distance between a brush (3) and a wall surface by means of brush ranging sensors (51, 52); and comparing the first measurement value with a first upper limit value and a second lower limit value according to the first upper limit value and a first lower limit value of a range of the distance between the brush (3) in normal operation and the wall surface, and controlling a moving platform (4) according to the comparing result. Also provided are a controller for implementing the control method, a wall washing device, and a wall washing vehicle comprising the wall washing device.

IPC Classes  ?

• E01H 1/05 - Brushing apparatus with driven brushes

Abstract

A waste gas treatment apparatus and an asphalt mixture thermal regeneration device (1). The waste gas treatment apparatus is used for treating asphalt smoke produced in a thermal regeneration process of an old asphalt material and comprises at least one combustor (13, 23) and a waste gas lead-out pipeline (31) that is used for leading waste gas with asphalt smoke out of old asphalt material drying rollers (11, 21). The waste gas treatment apparatus further comprises at least one flame tube (15, 25) and at least one waste gas distribution pipeline (33, 35); the at least one flame tube (15, 25) matches with the at least one combustor (13, 23), and the at least one waste gas distribution pipeline (33, 35) conveys the waste gas led out by the waste gas lead-out pipeline (31) into the at least one flame tube (15, 25) for combustion. The waste gas treatment apparatus can effectively reduce or eliminate flammable gas such as asphalt smoke in the waste gas.

IPC Classes  ?

• E01C 19/08 - Apparatus for transporting and melting asphalt, bitumen, tar, or the like
• F23G 7/06 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of specific waste or low grade fuels, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases

Abstract

An engineering mechanical vehicle, a vehicle steering following control system and a vehicle steering following control method. The system comprises a control valve group (10), a steering actuation cylinder (11) and a centering cylinder (12). The control valve group (10) comprises a servo valve (20), a solenoid valve (24), a hydraulic control check valve (21), and a hydraulic control reversing valve (22). The servo valve (20) is connected with the steering actuation cylinder (11); the solenoid valve (24) is connected with the centering cylinder (12). The hydraulic control check valve (21) comprises first oil ports (B1, b1), second oil ports (B3, b3), and control oil ports (B2, b2); the first oil ports (B1, b1) of the hydraulic control check valve (21) are connected with the steering actuation cylinder (11); the second oil ports (B3, b3) of the hydraulic control check valve (21) are connected with an oil returning tank (T). The hydraulic control reversing valve (22) comprises a control oil port (C1) and a working oil port (C2); the control oil port (C1) of the hydraulic control reversing valve (22) is in communication with a hydraulic circuit arranged between the solenoid valve (24) and the centering cylinder (12); the working oil port (C2) of the hydraulic control reversing valve (22) is connected with the control oil ports (B2, b2) of the hydraulic control check valve (21). Hence, fast response of the steering actuation cylinder (11) in following and steering processes is improved and meanwhile, a fast lockout function of the hydraulic control check valve (21) is ensured.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle

Abstract

A suspension group control system and suspension group control method for a vehicle. The suspension group control system comprises multiple suspension oil cylinders (19), first and second sensors (13, 15), a controller (17) and a suspension valve group (18). The first sensor (13) senses whether the vehicle bears a load; the second sensor (15) senses the load size of the vehicle; the controller (17) generates a suspension group mode according to sensing results of the first sensor (17) and the second sensor (18), the generated suspension group mode being used as a reference for determining a finally output suspension group mode, and controls a running speed of the vehicle according to the determined suspension group mode; a suspension group mode input upon manual triggering can be used as another reference. The running reliability and safety of the vehicle are improved.

IPC Classes  ?

• B60G 17/015 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements

Abstract

A hydraulic system for controlling tension of a steel wire rope comprises a master reversing valve (2), a switching valve (3), a check valve (4), a backpressure valve (5), and a hydraulic motor (1). The master reversing valve (2) is used for leading hydraulic oil into or out of the hydraulic system; the hydraulic motor (1) is used for outputting power to a traction device of the steel wire rope; a first end of the switching valve (3) is in communication with a first oil outlet (A) of the master reversing valve (2), an inlet of the check valve (4), and an outlet of the backpressure valve (5); a second end of the switching valve (3) is in communication with a second oil outlet (B) of the master reversing valve (2) and a first end (B) of the hydraulic motor; and an inlet of the backpressure valve (5) is in communication with an outlet of the check valve (4) and a second end (A) of the hydraulic motor (1). The present invention provides a crane having the hydraulic system and a method for controlling tension of a steel wire rope. The system and the method can solve the problems in the prior art that a telescopic-boom crane with a super-lift winding mechanism has low stability and low work efficiency during stretching of a lifting boom.

IPC Classes  ?

• B66C 13/20 - Control systems or devices for non-electric drives
• B66C 23/693 - Jibs telescopic while in use extensible by fluid pressure
• B66D 1/44 - Control devices non-automatic pneumatic or hydraulic
• B66D 5/26 - Operating devices pneumatic or hydraulic

Abstract

An engineering vehicle (4) and a safety control method and a safety control device (30) for an electronic control steering system thereof are used for solving the problem in the prior art that an unreasonable operation on a steering mode switch is apt to affect running of an engineering vehicle. The method comprises: recording a current steering control mode of an engineering vehicle; and when working conditions of the engineering vehicle (4) change, comparing a current steering control mode of the engineering vehicle (4) with the recorded steering control mode, and according to a comparison result and the changed working conditions, determining a steering control mode to be adopted currently. By means of the technical solution, running safety of the engineering vehicle (4) can still be ensured in the case of unreasonable operation on the steering mode switch.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle

Abstract

A material lifting device of a drying drum (1) comprises a fixed seat (23) and a material lifting component (21) hinged on the fixed seat (23), wherein the material lifting component (21) is capable of swinging to and fro between a loading position and a no-load position relative to the fixed seat (23). Also provided are a drying drum (1) and asphalt mixture regeneration equipment comprising the drying drum (1). The drying drum (1) comprises a drum body (10) and a plurality of material lifting devices distributed on the circumference of an inner wall surface of the drum body (10) at intervals. Because the material lifting component (21) is disposed in a hinged manner, after the material is thrown by the material lifting component (21) from the top of the drying drum (1), the material lifting component (21) can shake under the effect of centrifugal force and gravity, hence reducing the bonding of the asphalt material.

IPC Classes  ?

• E01C 19/10 - Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resinsApparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions

Abstract

Disclosed is a bolt mechanism control system, comprising a hydraulic oil tank (110), an oil pump (120), a first reversing valve (130), a multi-channel group (140), an arm pin oil cylinder (170), a cylinder pin oil cylinder (180), a second reversing valve (150), and a third reversing valve (160). The first reversing valve is connected with the oil pump and has a first outlet/inlet (A) and a second outlet/inlet (B). The multi-channel group has a first channel (141), a second channel (142), a first outlet/inlet (143), and a second outlet/inlet (144). The first outlet/inlet of the multi-channel group is in communication with the first channel; the second outlet/inlet of the multi-channel group is in communication with the second channel; the first channel of the multi-channel group is connected with the first outlet/inlet of the first reversing valve; and the second channel of the multi-channel group is connected with the second outlet/inlet of the first reversing valve. The second reversing valve and the arm pin oil cylinder are sequentially connected between the first outlet/inlet and the second outlet/inlet of the multi-channel group; the third reversing valve and the cylinder pin oil cylinder are sequentially connected between the second outlet/inlet and the first outlet/inlet of the multi-channel group. Also disclosed is a crane comprising the bolt mechanism control system. The bolt control system realizes the interlocking between the cylinder pin and the arm pin of the bolt mechanism, and hence improves the security and reliability.

IPC Classes  ?

• B66C 13/20 - Control systems or devices for non-electric drives
• B66C 23/693 - Jibs telescopic while in use extensible by fluid pressure
• B66C 23/88 - Safety gear

Abstract

Disclosed are engineering machinery and a safety state determining method, device and system thereof. The method comprises the following steps: constructing at least one grade of safety control area (A1-A3,S1) according to the position of support legs (1A、1B、1C、1D) of the engineering machinery after the support legs are unfolded; calculating an equivalent mass center (G,S2) of the engineering machinery; judging the position relation (S3) between the equivalent mass center of the engineering machinery and the at least one grade of safety control area; and determining safety state (S4) of the engineering machinery according to the position relation. The device comprises a safety control area construction module, an equivalent mass center calculation module, a position relation determining module and a safety state determining module. The system comprises the device, a first group of sensors used for detecting stretching quantity of the support legs of the engineering machinery in the horizontal direction and a second group of sensors (2-4) used for detecting moving parameters of operation parts. The engineering machinery comprises lower equipment (11), a rotating platform (12) and the operation parts (5-10) and further comprises the device or the system. By applying the method and the device, the succor ability of the engineering machinery in a complicated succor circumstance is improved, and the safety operation of the engineering machinery can be ensured.

IPC Classes  ?

• B60S 9/00 - Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
• A62C 27/00 - Fire-fighting land vehicles
• B66C 15/00 - Safety gear
• B66C 23/88 - Safety gear

Abstract

Disclosed in the present invention is a working hopper protection device for an overhead working lorry, which comprises at least a limiting mechanism (100), the said limiting mechanism (100) comprises at least a limiting part (11) provided on the frame bracket (1) of the working hopper (2), and at least a matching part (21) arranged on a bottom part of the hopper. And an overhead working lorry is provided, which comprises a working hopper and an aforesaid working hopper protection device. In case of load-bearing parts failure in said working hopper protection device, the working hopper is prevented from sliding in horizontal direction, and/or from rolling over, and is effectively prevented from slipping off and/or turning over.

IPC Classes  ?

• B66F 17/00 - Safety devices, e.g. for limiting or indicating lifting force

Abstract

Disclosed is a tower crane access platform structure, comprising: an access platform (5) having a hinged part (7) hinged to a tower crane main body (1); guy rods (3, 6), the first end of which is connected to the tower crane main body (1), and the second end of which is connected to the access platform (5); and a flipping and lifting mechanism (2) for driving the connection to the access platform (5), making the access platform (5) flip around the hinged part (7). The tower crane access platform can prevent interference between the lifting hook and the platform, reducing latent safety dangers, while also reducing the size of the access platform, facilitating use and transportation.

IPC Classes  ?

• B66C 23/62 - Constructional features or details
• B66C 23/26 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes for use on building sitesCranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
• B66C 23/28 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes for use on building sitesCranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail constructed to operate at successively higher levels

Abstract

Disclosed is an oil tank for an excavator, comprising an oil tank body (1), a suction oil filter assembly (3), a return oil filter assembly (4) and a first pre-pressed air filter (2), wherein the suction oil filter assembly (3) is located in a suction oil chamber (A) of the oil tank body (1), the return oil filter assembly (4) is located in a return oil chamber (B) of the oil tank body (1), and the first pre-pressed air filter (2) is arranged on the oil tank body (1) and is in communication with the suction oil chamber (A). Also disclosed is a pressure balancing device arranged on the oil tank body (1) for balancing the pressure between the suction oil chamber (A) and the return oil chamber (B). Further disclosed is an excavator having the oil tank.

IPC Classes  ?

• B60K 15/03 - Fuel tanks
• F15B 1/26 - Supply reservoir or sump assemblies
• E02F 9/22 - Hydraulic or pneumatic drives

Abstract

Disclosed are a crane, and a closed-type hoist negative power control system for use with the crane. The control system comprises an engine (1), a transfer case (2), an open-type system (3) and a closed-type system (4), wherein the open-type system (3) and the closed-type system (4) are connected to the transfer case (2), respectively, and are connected to the engine (1) via the transfer case (2). The closed-type system (4) comprises a closed-type variable displacement pump (31) connected to the transfer case (2), a hoist motor (32) connected to the closed-type variable displacement pump (31) via a hydraulic pipeline, and a hoist reduction gear (33) connected to the hoist motor (32). When the crane is lowering a weight, the transfer case (2) transfers part or all of the negative power to the open-type system (3). When the closed-type hoist is lowering a weight, the negative power generated is transferred to the open-type system (3) by the transfer case (2), and is absorbed by the open-type system (3), meaning there is no longer a restriction on the speed of lowering a weight; therefore, better control effects are achieved compared with the prior art.

IPC Classes  ?

• B66C 13/20 - Control systems or devices for non-electric drives
• B66C 23/86 - Slewing gear hydraulically actuated

Abstract

Disclosed are a method and a device for controlling the rotation of rotatable engineering machinery, used for solving the problem of low stability when there is a change in the rotational speed of a crane in the prior art. The method comprises: saving the rotating set information comprising the target rotating tangential acceleration (A1, A2, A3, A4) corresponding to the operating radius (R1, R2, R3, R4) of the engineering machinery respectively; after receiving a rotation activation command, determining the present target rotating tangential acceleration according to the present operating radius of the engineering machinery and the rotation set information; and controlling the rotation of the engineering machinery according to the present target rotating tangential acceleration. The method and the device aid in preventing the influence of additional rotating dynamic bending moment on the stability of the whole machine, such that the operating safety of the engineering machinery is improved.

IPC Classes  ?

• B66C 23/84 - Slewing gear
• B66C 13/18 - Control systems or devices

Abstract

A dust removing box and a dust removing system with same, which are used for filtering dusty air flow, the dust removing box comprises a box body and an air filtering barrel arranged in the box body, wherein the box body is provided with an air exhaust and an air inlet, the dusty air flow enters the box body from the air inlet, is filtered by the air filtering barrel and is discharged from the air exhaust, the air inlet is close to the top of the air filtering barrel, the top of the air filtering barrel is communicated with the air inlet, and the bottom of the air filtering barrel is closed. In the dust removing box and the dust removing system with the same, an upper inlet and upper exhaust dust removing mode is adopted, so that the phenomenon that dust which has been filtered off by the air filtering barrel is continuously remixed in the dusty air flow when the continuous dusty air flow rushes into and floods the box body from the lower side of the dust removing box is avoided.

IPC Classes  ?

• B01D 46/24 - Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
• B01D 46/42 - Auxiliary equipment or operation thereof

Abstract

Disclosed are a method, a device and a system for controlling the rotation of a crane, and a crane. The method comprises: obtaining the rotating linear velocity of the pendant ballast according to the rotating linear velocity of the rotating mechanism of the present crane, the length of the pendulum formed by the pendant ballast and the pendant cord, and a preset included angle formed by the pendant cord and the vertical direction based on the present conditions of the crane; reducing the rotational speed of the crane when the differential between the rotating linear velocity of the rotating mechanism and the rotating linear velocity of the pendant ballast is greater than a first preset value. The method aids in reducing the impact from the ballast and the tangential deflection angle of the ballast and the impulse load on the head of the boom while meeting the stability, structural integrity and rigidity conditions of the vehicle, such that operational safety is ensured.

IPC Classes  ?

• B66C 13/22 - Control systems or devices for electric drives
• B66C 23/84 - Slewing gear

Abstract

A rigidity-variable cushioning device (100) comprises a cushioning cylinder (10), a cushioning rod (20), and multiple cushioning members (30). One end of the cushioning cylinder is closed, and the other end is open. The cushioning cylinder comprises multiple chambers that are sequentially communicated. Each chamber is provided with a cushioning member. The chamber at the open end of the cushioning cylinder is a first cushioning chamber (11). The cushioning member disposed in the first cushioning chamber is a first cushioning member (31). The chamber at the closed end of the cushioning cylinder is a first pre-pressured chamber (12). The cushioning member disposed in the first pre-pressured chamber is a first pre-pressured cushioning member (32). Among the cushioning members, at least the first pre-pressured cushioning member is in compressed state. The cushioning rod is inserted through the open end, and is connected to the first cushioning member. The present invention also provides an anti-backward-tilting device for a lifting arm, and a crane. The present invention can provide rigidity-variable cushioning protection, and the structure is simple and safe.

IPC Classes  ?

• F16F 9/32 - Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium Details
• B66C 23/92 - Snubbers or dash-pots for preventing backwards-swinging of jibs, e.g. in the event of cable or tackle breakage

Abstract

Disclosed are a truss arm butt-joint structure, and a truss arm and a truss arm crane with same. The truss arm butt-joint structure comprises: a first arm frame chord member (1), a second arm frame chord member (2) and a connector, wherein the connector is connected to the first arm frame chord member (1) and the second arm frame chord member (2), respectively, and an end face of the first arm frame chord member (1) is in contact with an end face of the second arm frame chord member (2), forming a contact surface. A coupling plate connection is employed, meaning that no hinge flap needs to be manufactured, avoiding mass mould manufacture, making the connection suitable for limited manufacture of large truss arms, without requiring mass production of technical equipment. After machining the mounting face thereof, installation is more convenient. The connection form of the truss arm butt-joint structure being of contact surface type means that the head has no superfluous welding, avoiding the latent quality problems caused by welding.

IPC Classes  ?

• B66C 23/62 - Constructional features or details
• B66C 23/64 - Jibs

Abstract

Disclosed are a method and a system for controlling crane rotation. The method and the system comprise: determining the rotational acceleration or resultant rotational force of the pendant ballast when the crane is rotating (S31); when the rotational acceleration is greater than a preset value thereof, or when the resultant rotational force is greater than a preset value thereof (S33), reducing the rotary speed of the rotational motor within a determined time period so as to reduce the rotational acceleration of the crane (S35). Using the method and the system aids in preventing the destructive influence of the kinetic energy of the pendant ballast on the overall or partial stability of the crane.

IPC Classes  ?

• B66C 13/22 - Control systems or devices for electric drives

Abstract

Disclosed is a closed hydraulic circuit. A first switch valve is connected between the first interface of a closed oil pump and the first interface of a motor via a pipeline, and a second switch valve is connected between the second interface of the closed oil pump and the second interface of the motor via a pipeline. The oil output of an oil-compensation pump is divided into a first branch, a second branch and a third branch, wherein the first branch is connected to the pipe between the first switch valve and the first interface of the closed oil pump via a first oil-compensation valve; the second branch is connected to the pipe between the second switch valve and the second interface of the closed oil pump via a second oil-compensation valve; and the third branch divides into two branches after connecting to a one-way lock valve, wherein one branch is connected to the pipe between the first switch valve and the first interface of the motor via a first safety valve, the other branch is connected to the pipe between the second switch valve and the second interface of the motor via a second safety valve. An accumulator is connected to the pipeline between the one-way lock valve and each of the safety valves.

IPC Classes  ?

• B60K 17/10 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of fluid gearing

Abstract

Disclosed are a control system of a motor vehicle rear part (10), a motor vehicle having the control system, and the vehicle speed control method of the rear part (10) for the control system. The motor vehicle comprises a front part (11) and a rear part (10). The control system of the rear part (10) of the motor vehicle comprises a controller (13) and a power device (12), and the controller (13) is respectively connected to the front part (11) and the rear part (10) so as to obtain a vehicle speed signal of the front part (11), and create a control signal according to the vehicle speed signal of the front part (11). The power device (12) is used for driving the rear part (10), and the power device (12) is connected to the controller (13) so as to control the vehicle speed of the rear part (10) according to the control signal. The control system and the control method are able to control the vehicle speed of the rear part (10) according to the vehicle speed signal of the front part (11) and the present status information of the rear part (10), such that the operating reliability, safety and driving performance of the whole vehicle are improved.

IPC Classes  ?

• B60K 31/00 - Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
• B60K 1/00 - Arrangement or mounting of electrical propulsion units

Abstract

Disclosed is a composite structure conveying pipe (30), comprising an outer pipe (31) and an inner pipe (32); the outer pipe (31) is made of a light alloy material; the inner pipe (32) is made of a light, wear-resistant material; and the inner pipe (32) is disposed inside the outer pipe (31). Further disclosed are a material conveying machine comprising the composite structure conveying pipe, and a method for manufacturing the composite structure conveying pipe. The outer pipe of the composite structure conveying pipe is made of a low-density, high-strength and high-tenacity material having better shear strength and lower cost in comparison with a composite material. The inner pipe is made of a light, wear-resistant material. Therefore, the overall weight of the composite structure conveying pipe is reduced by more than 50% in comparison with a steel conveying pipe, thus facilitating assembly and disassembly and greatly improving efficiency and safety.

IPC Classes  ?

• F16L 9/14 - Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
• F16L 23/00 - Flanged joints
• F16L 57/06 - Protection of pipes or objects of similar shape against external or internal damage or wear against wear
• B65G 53/32 - Conveying concrete, e.g. for distributing same at building sites

Abstract

A trolley weighing system comprises a trolley (2) and a rail (3) along which the trolley (2) can move, the rail (3) being provided with a material receiving position sensor (41), a material unloading position sensor (43), a trolley drive apparatus (7) and a control system (8). The trolley (2) has several wheels (21) matching with the rail (3). The rail (3) comprises two parallel slide rails (31). The control system (8) is in signal communication with the material receiving position sensor (41), the material unloading position sensor (43) and the trolley drive apparatus (7). The trolley weighing system also comprises several weighing units (5) provided on the slide rails (31). A sensing surface of the weighing unit (5) is provided on a bearing surface of the slide rail (31), and positions of the weighing units (5) correspond to positions of the several wheels (21) of the trolley. The control system (8) is in signal communication with the weighing units (5), thereby calculating the weight of the material unloaded by the trolley. A control method for the trolley weighing system is also provided, which integrates transportation and measurement, so that an accurate measurement result can be obtained.

IPC Classes  ?

• G01G 17/00 - Apparatus for, or methods of, weighing material of special form or property
• G01G 19/02 - Weighing apparatus or methods adapted for special purposes not provided for in groups for weighing wheeled or rolling bodies, e.g. vehicles

Abstract

A balance arm of a tower crane comprises: an arm section (1), the arm section comprising a first arm section (11), a second arm section (12) and at least one middle arm section (13) successively and detachably connected between the first arm section and the second arm section; a balancing weight (3) provided on the first arm section; a support (4) provided on the second arm section; a pull rod (2), the length of which can be adjusted, one end of the pull rod being detachably connected to the support, and the other end of the pull rod being detachably connected to any one of multiple different connection positions of the first arm section. Also disclosed is a tower crane comprising the balance arm. When the length of the balance arm is changed, the length of the pull rod and the distance from the balancing weight to an intersection point of a central line of the pull rod and a central line of the first arm section are changed at the same time, thereby improving a condition of the arm sections under stress. The present invention is characterized by a simple structure, reliable performance and a low cost.

IPC Classes  ?

• B66C 23/76 - Counterweights or supports for balancing lifting couples separate from jib and movable to take account of variations of load or of variations of length of jib
• B66C 23/70 - Jibs assembled from separate sections to form jibs of various discrete lengths
• B66C 23/72 - Counterweights or supports for balancing lifting couples

Abstract

The present invention relates to a discrete input apparatus, a discrete input design method and a discrete input detection method. The apparatus comprises an electronic control unit and multiple switches. The electronic control unit comprises multiple input/output ports. N ports of the input/output ports are defined as input ports, and additional M ports are defined as output ports. The switches comprise N groups, and each group has M switches. First ends of the M switches in each group are respectively connected to the M output ports, and second ends are joined together in a parallel manner, so as to be connected to one of the N input ports. The electronic control unit is configured in a manner of: the M output ports simultaneously outputting a specific potential, detecting the N input ports to determine whether one of the switches is triggered, and after it is determined that a switch is triggered, the M output ports successively outputting a specific potential, and detecting the N input ports to determine the triggered switch. In the present invention, discrete inputs are connected into a matrix, and line-by-line scanning is adopted to identify the triggered switch, which dramatically improves the discrete input capability of a control system.

IPC Classes  ?

• H03K 17/94 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the way in which the control signals are generated

Abstract

A control apparatus, a control method and a concrete pump for a viscous body pumping mechanism. The control apparatus comprises at least one function device for implementing at least one corresponding function, at least one detection unit for detecting corresponding operation performance of the at least one function device after the function device implements the at least one corresponding function, and a control unit (12) which is separately connected with the at least one function device and the at least one detection unit. The control method comprises the following steps: controlling at least one function device according to the position of a piston in the pumping mechanism, so as to implement at least one corresponding function, detecting, in real time, corresponding operation performance of the at least one function device after the function device implements the at least one corresponding function, and according to a detection result, adjusting a period of time from receiving a piston position signal (i1, i2, i3) to transmitting a control signal to the at least one function device. The concrete pump comprises the control apparatus. The control apparatus and the method can achieve optimal pumping performance under any working condition.

IPC Classes  ?

• F04B 49/06 - Control using electricity
• F04B 15/02 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous

Abstract

A pneumatic braking system and a tire type engineering machinery comprising the pneumatic braking system. The pneumatic braking system comprises an air-reserve cylinder (1, 2), a brake valve (3) and at least one pneumatic braking unit (4). The brake valve (3) comprises a first air inlet and a first air outlet, the first air inlet communicating with the air-reserve cylinder (1, 2). The at least one pneumatic braking unit (4) comprises a relay valve (41) and at least one braking air chamber (42). The relay valve (41) comprises a second air inlet (411), a second air outlet (412) and a control opening (413), the second air inlet (411) and the second air outlet (412) respectively communicating with the air-reserve cylinder (1, 2) and the at least one braking air chamber (42) through an air supply pipeline (5), and the control opening (413) communicating with the first air outlet of the brake valve (3) through a control pipeline (6). The at least one pneumatic braking unit (4) also comprises a pressure regulating unit (43) used for enabling the relay valve (41) to output different braking pressures.

IPC Classes  ?

• B60T 8/18 - Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
• B60T 13/26 - Compressed-air systems
• B60T 15/04 - Driver's valves

Abstract

A landing leg apparatus comprises a main body (10), a main shaft (20) and two landing legs (30). The main shaft (20) can be installed on the main body (10) in a rotating manner. The two landing legs (30) are respectively and pivotally installed on two ends of the main shaft (20). A rotation center line of the main shaft (20) is perpendicular to a pivotal center line of the landing legs (30). A traveling crane comprising the landing leg apparatus is also provided. By pivoting the landing legs and rotating the main shaft, the landing legs can be stretched and extended out relative to the main body, thereby overcoming inconvenience in installation and operation caused by fixing the landing legs on the main body.

IPC Classes  ?

• B66C 23/80 - Supports, e.g. outriggers, for mobile cranes hydraulically actuated

Abstract

A spiral material distribution system comprises a spiral drive apparatus (1), a material distribution screw rod (2), a spreading groove (3) and a control device. The material distribution screw rod (2) is positioned in the spreading groove (3) and is driven by the spiral drive apparatus (1) to rotate. The control device comprises a receiving apparatus (10) and a controller (20). The controller (20) is connected to the receiving apparatus (10) and the spiral drive apparatus (1), and compares a detected material level value with a preset material level value, so as to control running of the spiral drive apparatus (1). Also provided are a method for controlling the spiral material distribution system and an engineering mechanical device configured with the spiral material distribution system. According to different material level situations, the control device controls, in different manners, the spiral drive apparatus (1) to work, so that a material is spread evenly.

IPC Classes  ?

• E01C 19/12 - Machines, tools, or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials

Abstract

Disclosed in the present invention are a four-axle truck crane and a steering mechanism thereof. The steering mechanism of the four-axle truck crane comprises a first steering mechanism and a second steering mechanism, wherein the first steering mechanism comprises a steering gear (10) and a first driving mechanism, and the first driving mechanism connects the steering gear (10) to the first and the second axles of the four-axle truck crane; the second steering mechanism comprises a second driving mechanism, and the second driving mechanism connects the first driving mechanism to the third and the fourth axles of the four-axle truck crane. According to the four-axle truck crane and the steering mechanism thereof, all-wheel steering is achieved, the turning radii can be reduced, the maneuver performance of the four-axle truck crane can be improved and the requirement of operation in a narrow and small place can be met.

IPC Classes  ?

• B62D 7/16 - Arrangement of linkage connections
• B62D 7/14 - Steering linkageStub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering

Abstract

A telescopic type suspension arm splitting method comprises: a step S1 of extending out a to-be-dismantled suspension arm (40), then extending out a to-be-reserved suspension arm (30) connected with the to-be-dismantled suspension arm (40), and exposing a suspension arm pin (50) which is connected with the to-be-dismantled suspension arm (40) and the to-be-reserved suspension arm (30); a step S2 of carrying out amplitude variation to a telescopic type suspension arm, enabling the telescopic type suspension arm to be inclined downwards along the extending-out direction, and fixing the telescopic type suspension arm; and a step S3 of retracting the suspension arm pin (50), and dismantling the to-be-dismantled suspension arm (40) from the inside of the to-be-reserved suspension arm (30). The telescopic type suspension arm splitting method according to the present invention can reduce splitting difficulty of the telescopic type suspension arm, reduce labor intensity, improve working efficiency, and prolong service life of the suspension arm pin.

IPC Classes  ?

• B66C 23/687 - Jibs telescopic

Abstract

A steering system (10) and a steering method of an engineering vehicle. The steering system (10) comprises a first steering shaft group, a second steering shaft group, a third steering shaft group, a rod system connection steering control system, a first electro-hydraulic steering control system and a second electro-hydraulic steering control system. The rod system connection steering control system controls the first steering shaft group to perform steering. The first electro-hydraulic steering control system receives turning-angle signals of appointed steering shafts in the first steering shaft group, so as to calculate targeted turning angles of steering shafts in the second steering shaft group, and controls the second steering shaft group to perform steering with reference to turning-angle signals of the steering shafts in the second steering shaft group. The second electro-hydraulic steering control system receives the turning-angle signals of the appointed steering shafts, so as to calculate targeted turning angles of steering shafts in the third steering shaft group, and controls the third steering shaft group to perform steering with reference to turning-angle signals of the steering shafts in the third steering shaft group. The steering system (10) can give play to the advantages of each steering control manner and avoid or weaken the disadvantages thereof, thereby being capable of improving steering performance of the whole engineering vehicle.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 7/14 - Steering linkageStub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering

Abstract

A cleaning vehicle, comprising a chassis, and a first and/or a second sweeping mechanism and a first and/or a second wetting mechanism transversely mounted on the chassis; the first and/or the second wetting mechanism are disposed corresponding to the first and/or the second sweeping mechanism, and used to prewet an area to be swept by the first and/or the second sweeping mechanism. The present invention can clean the side area by wetting, sweeping and cleaning, thus improving the cleaning capability for the road side area.

IPC Classes  ?

• E01H 3/02 - Mobile apparatus, e.g. watering-vehicles
• E01H 1/10 - Hydraulically loosening or dislodging undesirable matterRaking or scraping apparatus
• E01H 1/00 - Removing undesirable matter from roads or like surfaces, with or without moistening of the surface

Abstract

An asphalt mixing device and an asphalt mixing method. The asphalt mixing device comprises a mixing tank (1), multiple storage tanks (6) and an asphalt pipeline (9). An asphalt mixture outlet (214) is arranged on the bottom of the mixing tank (1); the storage tanks (6) are connected to the asphalt mixture outlet (214) of the mixing tank (1) via the asphalt pipeline (9); a mixing propeller (23) for mixing the asphalt and admixtures added into the mixing tank (1) is arranged in the mixing tank (1); the asphalt mixture which has been mixed in the mixing tank (1) is transported into the storage tanks (6) via the asphalt mixture outlet (214) and the asphalt pipeline (9). The mixing tank (1) of the asphalt mixing device has smaller volume than the storage tanks (6), so asphalt may be fully and uniformly mixed. Besides, a mixing device (7) is arranged in a storage tank (6) and it can be ensured that the admixtures are uniformly and stably dispersed in the asphalt through rotation of the mixing device (7), thereby reducing the phenomenon such as layering, agglomeration or segregation.

IPC Classes  ?

• E01C 19/10 - Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resinsApparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
• C10C 3/00 - Working-up pitch, asphalt, bitumen
• C08L 95/00 - Compositions of bituminous materials, e.g. asphalt, tar or pitch

Abstract

A charging and discharging circuit for an electrical system, comprising: an energy-storing unit (101), an electromotor driver (102), a battery (103), and further comprising: a logic control unit (104) connected to the energy-storing unit (101) and the electromotor driver (102) via a data bus; a switch control unit (105) connected to the logic control unit (104) and the battery (103) for receiving a logic control signal sent by the logic control unit (104) and controlling the switching on and off of individual touch points in a voltage dividing unit (106); the voltage dividing unit (106) being connected to the energy-storing unit (101) and the electromotor driver (102) for receiving a switch control signal sent by the switch control unit (105) to switch off or on the individual touch points so as to adjust the resistance values of the voltage dividing resistance. By using the charging and discharging circuit for an electrical system, the resistance value of the voltage dividing resistance can be adjusted at a proper time to improve the efficiency of charging and discharging, and a high flexibility is achieved.

IPC Classes  ?

• H02M 3/00 - Conversion of DC power input into DC power output
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

Disclosed in the present invention is a power matching system for an electronic control engine and a variable capacity hydraulic pump. The system comprises an electronic control engine (11); an engine controller (12) for measuring actual rotating speed of the electronic control engine; a master controller (13) for comparing the actual rotating speed with acquired target rotating speed, if the actual rotating speed is smaller than the target rotating speed and the difference between the target rotating speed and the actual rotating speed is larger than a set threshold value, suitable fine adjustment current is output to a proportional solenoid (14) according to the difference; the proportional solenoid (14), the opening of which is increased according to the received fine adjustment current; and a variable capacity hydraulic pump (15) which runs under the effect of power of the electronic control engine. The system increases the rotating speed of the electronic control engine by means of reducing load of the electronic control engine, reduces oil consumption for adjusting the rotating speed of the electronic control engine via the engine controller (12) and simultaneously makes the variable capacity hydraulic pump (15) stably run at the optimal power point of the electronic control engine. Also disclosed in the present invention is a method corresponding to the system.

IPC Classes  ?

• E02F 9/22 - Hydraulic or pneumatic drives
• E02F 9/20 - DrivesControl devices
• F02D 29/04 - Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps

Abstract

A slewing bearing (200) comprising an outer ring (201), a middle ring (202), an inner ring (203), a plurality of rollers (204), a bottom ring (206), and a connecting pin (205). The outer ring (201), the middle ring (202) and the inner ring (203) are annular structures which are sequentially embedded. An outer rolling way is formed between the outer ring (201) and the middle ring (202), and an inner rolling way is formed between the middle ring (202) and the inner ring (203). The plurality of rollers (204) are placed in the outer rolling way and the inner rolling way, so that the middle ring (202) can rotate relative to the outer ring (201) and the inner ring (203). The bottom ring (206) is detachably fixed on the outer ring (201) and/or the inner ring (203) through the connecting pin (205). A mechanical device comprising the slewing bearing (200). The slewing bearing (200) and the mechanical device enables rapid and frequent disassembly and assembly of the slewing bearing (200) can be implemented through the connecting pin (205).

IPC Classes  ?

• F16C 19/56 - Systems consisting of a plurality of bearings with rolling friction in which the rolling bodies of one bearing differ in diameter from those of another
• B66C 23/84 - Slewing gear

Abstract

A concrete device and an arm support thereof. The arm support comprises a main beam (1) made of a first fiber composite material and a reinforced layer (3) which is integrally formed by a second fiber composite material and is connected to the main beam (1). The reinforced layer (3) is arranged on at least one part of the surface of the outer side of the main beam (1). The arm support is totally made of the composite materials; therefore, on one hand, a weight reduction effect is enhanced, and on the other hand, the impact resistance strength and the structural stability of the arm support are improved.

IPC Classes  ?

• E04G 21/04 - Devices for both conveying and distributing

Abstract

A concrete pumping device, a bending connecting rod mechanism thereof and a manufacturing method for the bending connecting rod mechanism are provided. The bending connecting rod mechanism comprises shaft sleeves (2), at least two composite material support plates (1) provided with holes, and cover plates (4) fixed at the ends of the shaft sleeves (2), in which, the shaft sleeves (2) are embedded in the holes and sheathed instantly by the support plates (1). The bending connecting rod is formed from the composite material support plates (1) and the shaft sleeves (2) pre-embedded therein by heat pressing and solidifying. The bending connecting rod mechanism has characters of light weight, high strength, good corrosion resistance and easy designable performance.

IPC Classes  ?

• E04G 21/04 - Devices for both conveying and distributing
• F16H 21/00 - Gearings comprising primarily only links or levers, with or without slides
• F16H 21/10 - Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane

Abstract

A boom loading device for engineering machinery, the loading device comprising: a rail (100); at least one support trolley (200) slidably disposed on the rail and provided with a first locking device (201) capable of locking the support trolley (200) on the track (100); at least one loading device (300) comprising a base (301) and a loading mechanism (302) installed on the base (301), the base (301) of each loading device (300) being disposed on the corresponding support trolley (200); and at least one fixture (400) for clamping the arm support (600), the at least one fixture (400) being installed on the corresponding loading mechanism (302). With the above technical solution, each support trolley (200) can slide on the rail (100), thus adapting to booms (600) of different lengths; and each support trolley (200) is provided with a loading device (300) thereon capable of loading the boom (600), thus providing a special device capable of conducting fatigue test for various booms.

IPC Classes  ?

• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details

Abstract

A control method of a roller running system comprises: acquiring a set speed of a front steel wheel (40); determining, according to the set speed and a condition for forming pure rolling by the front steel wheel (40) and at least a pair of rear driving wheels (50, 60), a set speed of a first rear driving wheel (50) and a set speed of a second rear driving wheel (60) in the at least a pair of rear driving wheels (50, 60); acquiring a detection speed of the front steel wheel (40), a detection speed of the first rear driving wheel (50), and a detection speed of the second rear driving wheel (60); and respectively adjusting, according to a difference between the set speed of the front steel wheel (40) and the detection speed thereof, a difference between the set speed of the first rear driving wheel (50) and the detection speed thereof, and a difference between the set speed of the second rear driving wheel (60) and the detection speed thereof, the speed of the front steel wheel (40), the speed of the first rear driving wheel (50), and the speed of the second rear driving wheel (60) to the set speed of the front steel wheel (40), the set speed of the first rear driving wheel (50), and the set speed of the second rear driving wheel (60).

IPC Classes  ?

• E01C 19/26 - Rollers thereforSuch rollers usable also for compacting soil self-propelled or fitted to road vehicles
• E01C 19/23 - Rollers thereforSuch rollers usable also for compacting soil
• B60K 28/16 - Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle responsive to, or preventing, spinning or skidding of wheels
• B60K 17/356 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels

Abstract

A method, apparatus (20), and system for measuring a load of a crane, and the crane. The method comprises: step A: measuring the tensions of tension units evenly arranged on both sides of a boom, thereby acquiring two tension values; and step B: determining, on the basis of the two tension values, if a side load of the crane exceeds a predetermined range, then outputting the determination result. The method, apparatus (20), and system are capable of measuring conveniently and accurately the side load of the crane. Combined with the prior apparatus, only two tension measuring apparatus (31 and 32) are required to be added, increase in costs is minimal. In addition, when the two tension measuring apparatus (31 and 32) are added, convenience is allowed in determining if the load of the crane is overloaded, more direct and accurate when compared with the load measuring method for the prior torque limiter. The problem in measuring the side load of the crane is solved.

IPC Classes  ?

• B66C 13/16 - Applications of indicating, registering, or weighing devices
• B66C 23/90 - Devices for indicating or limiting lifting movement

Abstract

Provided are a crane and a boom thereof. The boom comprises a movable boom (20) and a base boom (10). The movable boom comprises: a luffing part (21), where the luffing part is pivotable connected to the base boom; a support frame (23), where a first end of the support frame is pivotably connected to the base boom; a lean forward protection unit (24), where a first end of the lean forward protection unit is pivotably connected to the base boom, and where a second end of the lean forward protection unit is pivotably connected to the support frame; a lean backward protection unit (25), where a first end of the lean backward protection unit is pivotably connected to the base boom, and where a second end of the lean backward protection unit is pivotably connected to the support frame; and a luffing mechanism (26) comprising a luffing steel wire rope (22), where the luffing steel wire rope and the luffing part are connected and pass around the second end of the support frame. The lean forward protection unit bears the pulling force when the crane is in a lifting operation, while the lean backward protection unit bears the pressure when no load is present, thus obviating a need for extensive hydraulic pipeline, and providing the advantages of simple structure and lightweight.

IPC Classes  ?

• B66C 23/693 - Jibs telescopic while in use extensible by fluid pressure
• B66C 23/82 - Luffing gear
• B66C 23/94 - Safety gear for limiting slewing movements