Abstract

The present invention relates to the field of engineering machinery, specifically relates to the field of design and manufacturing of hydraulic oil cylinders, and particularly relates to a thermoplastic polyimide supporting ring and a preparation method therefor. By using a composite application technology of a nano nucleating agent and a two-dimensional transition metal sulfide, the present invention increases the crystallization speed of a polyimide supporting ring on the molecular structure level, shortens the injection molding time, and optimizes the molding effect; and on the macroscopic level, the wear resistance of polyimide is improved, and the service life is prolonged. Upon test verification, the polyimide supporting ring of the present invention has the effects of good forming quality, a high high-temperature compression strength, good wear resistance and a long service life.

IPC Classes  ?

• C08L 79/08 - Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• C08K 9/04 - Ingredients treated with organic substances
• C08K 3/30 - Sulfur-, selenium-, or tellurium-containing compounds

Abstract

The present disclosure relates to a method for controlling a backhoe loader and a backhoe loader, and relates to the field of engineering machinery. The method for controlling a backhoe loader includes: setting a power upper threshold P_0 for a variable displacement pump of the backhoe loader according to an operating mode of the backhoe loader; where the backhoe loader includes an engine, the variable displacement pump, a traveling system, a loading operation system, and a digging operation system; the operating mode includes: a traveling mode, a loading operation mode, and a digging operation mode; and adjusting the power upper threshold P_0 of the variable displacement pump according to an actual load of the backhoe loader in a current operating mode. In the technical solutions, the power upper thresholds P_0 are different in different operating modes. Power of the variable displacement pump is adjusted in real time.

IPC Classes  ?

• E02F 9/22 - Hydraulic or pneumatic drives
• E02F 3/96 - Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate use of different digging elements
• E02F 9/24 - Safety devices
• E02F 9/26 - Indicating devices
• F15B 20/00 - Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems

Abstract

The present disclosure relates to the technical field of engineering machinery automation. Provided are a semantic segmentation method, apparatus and system, and engineering machinery equipment. The method comprises: processing an original image of an operation area of engineering machinery equipment, so as to obtain at least one image feature map group, wherein each image feature map group comprises a plurality of image feature maps having different scales; processing point cloud data of the operation area, so as to obtain a radar feature map group; for each image feature map group, executing fusion with the radar feature map group, so as to obtain a fused feature map; and obtaining a semantic segmentation result on the basis of the fused feature map.

IPC Classes  ?

• G06V 10/26 - Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion

Abstract

A self-priming pump, comprising: a primary pump body unit (10), which is provided with a primary volute (11), a primary impeller (12) and a primary liquid output pipe (13), wherein the primary volute (11) is provided with a first liquid inlet (IN1), the primary impeller (12) is arranged inside the primary volute (11), and the primary liquid output pipe (13) communicates with the primary volute (11); a secondary pump body unit (20), which comprises a secondary volute (21), a secondary impeller (22), a secondary liquid output pipe (23) and a liquid suction chamber (24), wherein the secondary impeller (22) is arranged inside the secondary volute (21), and the secondary liquid output pipe (23) and the liquid suction chamber (24) both communicate with the secondary volute (21); and a switching valve (30), which comprises a valve shell (31) and a valve core (32), wherein the valve shell (31) is provided with a second liquid inlet (IN2), the valve core (32) is arranged inside the valve shell (31), and the valve shell (31) communicates with both the liquid suction chamber (24) and the primary volute (11). The switching valve (30) is configured to close the second liquid inlet (IN2) by means of the valve core (32) and enable communication between the liquid suction chamber (24) and the primary volute (11) via the valve shell (31) in a state where the valve core (32) is located at a first position (P1), and close a communication passage between the valve shell (31) and the primary volute (11) by means of the valve core (32) and enable communication between the liquid suction chamber (24) and the second liquid inlet (IN2) via the valve shell (31) in a state where the valve core (32) is located at a second position (P2). The self-priming pump and a flood drainage operation apparatus comprising the self-priming pump can improve the scenario adaptability of drainage operation.

IPC Classes  ?

• F04D 1/10 - Multi-stage pumps with means for changing the flow-path through the stages, e.g. series/parallel
• F04D 9/02 - Self-priming pumps
• F04D 13/02 - Units comprising pumps and their driving means
• F04D 15/00 - Control, e.g. regulation, of pumps, pumping installations, or systems

Abstract

A traffic control system for mining trucks and a method for same. The traffic control system (100) comprises a map management server (110), configured to draw a mine road into a mine map; a path planning server (120), configured to plan a road node route on the basis of the mine map, and plan a transition route when a mining truck (140) switches lanes during a truck passing process; and a traffic control server (130), configured to store lane states of a plurality of lanes in the mine map, arbitrate a driving permission request of a mining truck (140) on the basis of the lane state of a lane into which the mining truck (140) is about to drive, approve the driving permission request of a mining truck (140) that meets a driving condition, and dynamically update the lane state according to the arbitration result, the lane states comprising an occupied state and an idle state. The traffic control system (100) and the method for same improve the efficiency off truck passing by the mining truck (140) on mine roads.

IPC Classes  ?

• G05D 1/698 - Control allocation
• G05D 1/246 - using environment maps, e.g. simultaneous localisation and mapping [SLAM]
• G05D 1/693 - for avoiding collisions between vehicles
• G05D 107/70 - Industrial sites, e.g. warehouses or factories

Abstract

An integrated valve is made by a method for designing and manufacturing a valve body of the integrated valve. The method for designing the valve body of the integrated valve includes: determining an internal flow channel structure of a valve body model of the integrated valve according to a hydraulic function implemented by the integrated valve; determining a position and a size of respective mounting structures, matched with the external devices, in the valve body model; determining a work structure of the valve body model according to the internal flow channel structure, and the position and the size of respective mounting structures; determining an internal connection plane of the valve body model, and determining an internal supporting table; and determining an external shell of the valve body model, and connecting the external shell with the work structure and the internal supporting table.

IPC Classes  ?

• F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]

Abstract

The present disclosure relates to a backhoe loader energy recovery and reuse system and a control method thereof, and a backhoe loader, wherein the system comprises: an actuator, configured to drive a working device to perform an action with hydraulic oil as a medium, and having a first cavity and a second cavity; a reversing valve, having a first working oil port communicated with the first cavity and a second working oil port communicated with the second cavity, the reversing valve being configured to reverse the actuator; a stabilizing valve group, having a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port and the second oil port being communicated with the first cavity and the second cavity, respectively, and the third oil port being communicated with an oil tank; and an energy storage part, communicated with the fourth oil port and configured to store hydraulic energy; wherein the first oil port and the third oil port have a first communication state therebetween, in which the hydraulic oil in the first cavity can enter the oil tank; the second oil port and the fourth oil port can be selectively connected or disconnected, and in a connected state, the second cavity is communicated with the energy storage part.

IPC Classes  ?

• E02F 9/22 - Hydraulic or pneumatic drives

Abstract

A method for estimating the coordinates of a bucket tooth tip, the method comprising: establishing a kinematic model of an excavator according to the size of each part of the excavator, and acquiring measured values of the coordinates of a bucket tooth tip of the excavator in combination with the angle of each part of the excavator, which is measured by an excavator sensor (100); acquiring system noise and measurement noise of the coordinates of the bucket tooth tip of the excavator (200); and according to the measured values of the coordinates of the bucket tooth tip of the excavator, and the system noise and measurement noise of the coordinates of the bucket tooth tip of the excavator, determining estimated values of the coordinates of the bucket tooth tip of the excavator (300). In this way, the measurement precision of the three-dimensional coordinates of bucket tooth tips and the construction quality of an excavator are improved. Further provided are an apparatus and system for estimating the coordinates of a bucket tooth tip, and an excavator and a storage medium.

IPC Classes  ?

• G01B 21/00 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant

Abstract

The present disclosure relates to a drive system for an engineering vehicle, a drive method, and an engineering vehicle. The drive system for an engineering vehicle includes: front wheels, rear wheels, a drive device, a first drive axle, a second drive axle, a first pressure detection device, a first calculation device, a speed acquisition device, and a drive distribution device. The first drive axle is connected between the drive device and the front wheels, and the second drive axle is connected between the drive device and the rear wheels. The first pressure detection device is configured to detect a pressure load on the first drive axle and a pressure load on the second drive axle, the first calculation device is configured to calculate a speed difference between the front wheels and the rear wheels, and the speed acquisition device is configured to acquire a running speed of the engineering vehicle. The drive distribution device is in signal connection with the first pressure detection device, the first calculation device, and the speed acquisition device. The drive distribution device is configured to adjust a drive mode of the drive system for an engineering vehicle according to the pressure load on the first drive axle, the pressure load on the second drive axle, the speed difference between the front wheels and the rear wheels, and the running speed.

IPC Classes  ?

• B60W 30/188 - Controlling power parameters of the driveline, e.g. determining the required power
• B60K 17/354 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having separate mechanical assemblies for transmitting drive to the front or to the rear wheels or set of wheels
• B60W 30/18 - Propelling the vehicle
• B60W 30/182 - Selecting between different operative modes, e.g. comfort and performance modes
• B60W 10/119 - Conjoint control of vehicle sub-units of different type or different function including control of all-wheel-driveline-means, e.g. transfer gears or clutches for dividing torque between front and rear axles

Abstract

Disclosed are an implement descending stability control method and system and a tractor. An outlet of a main pump is communicated with an inlet of a main overflow valve, an inlet of a constant-difference overflow valve and an inlet of an implement control valve. An oil outlet of the implement control valve is connected with a spring cavity of the constant-difference overflow valve through a steady-state throttle valve and is communicated with an inlet of a switching valve. An oil outlet of the switching valve is connected with a rodless cavity of a suspension cylinder in a suspension mechanism, and the rodless cavity of the suspension cylinder is communicated with an inlet of a descending valve. A rod cavity of the suspension cylinder is connected with an inlet of a secondary overflow valve.

IPC Classes  ?

• A01B 63/10 - Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
• F15B 15/28 - Means for indicating the position, e.g. end of stroke
• F15B 21/08 - Servomotor systems incorporating electrically- operated control means

Abstract

The present disclosure relates to an integrated hydraulic power device and a fire truck. The integrated hydraulic power device includes: an integrated valve including a valve body having an internal flow passage structure, a first mounting end and a second mounting end; a motor fixedly arranged at the first mounting end; a hydraulic oil tank fixedly arranged at the second mounting end; and a hydraulic pump located within the hydraulic oil tank and in drive connection with the motor, wherein the hydraulic pump has an oil suction port for drawing oil from the hydraulic oil tank, and the internal flow passage structure is communicated with the hydraulic oil tank and the hydraulic pump.

IPC Classes  ?

• F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
• F15B 1/26 - Supply reservoir or sump assemblies
• F15B 13/10 - Special arrangements for operating the actuated device without using fluid pressure, e.g. for emergency use

Abstract

A concrete placing boom (12). The concrete placing boom (12) is provided with supports (17), the supports (17) being configured to support a hose (15) at the tail end of a concrete conveying pipe (11); each support (17) is formed by a multi-layer composite tube made of at least two layers of aluminum alloys that are stacked; the at least two layers of aluminum alloys comprise an outermost-layer aluminum alloy (171) and an innermost-layer aluminum alloy (173); in the at least two layers of aluminum alloys, the outermost-layer aluminum alloy (171) has better wear resistance, and the innermost-layer aluminum alloy (173) has higher rigidity. The supports (17) have improved wear resistance and bearing performance and reduced weight, thereby improving the bearing performance and prolonging the service life of the concrete placing boom (12).

IPC Classes  ?

• F16L 9/02 - Rigid pipes of metal
• B22D 13/00 - Centrifugal casting; Casting by using centrifugal force
• E04G 21/04 - Devices for both conveying and distributing
• B22D 19/16 - Casting in, on, or around, objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills

Abstract

The present disclosure provides an apparatus and a method for predicting attenuation of a pre-tightening force of a bolt, which relate to the field of prediction on the pre-tightening force of a bolt. The apparatus for predicting attenuation of a pre-tightening force of a bolt includes a pre-tightening force coefficient measuring device, including a clamping assembly, a pre-tightening force detecting assembly, a tightening assembly and a time length measuring assembly. The clamping assembly is configured to fix a bolt to be detected; the pre-tightening force detecting assembly is configured to measure the pre-tightening force to the bolt; the tightening assembly is configured to apply the pre-tightening force to the bolt; the time length measuring assembly is configured to measure a time length of each sampling in the process of tightening the bolt.

IPC Classes  ?

• G01L 5/24 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
• G01L 27/00 - Testing or calibrating of apparatus for measuring fluid pressure

Abstract

A gear slicing tool and a manufacture method thereof are provided. The gear slicing tool includes a gear slicing tool body having concave and/or convex parts formed on a tool surface of the gear slicing tool body and a composite film layer disposed on the tool surface. The composite film layer includes a metal film layer, a transition film layer, and a functional film layer. A material of the metal film layer includes a metal. The transition film layer includes a first film layer and a second film layer. A material of the first film layer includes a nitride of the metal. A material of the second film layer includes a nitride of an alloy of the metal and aluminum. A material of the functional film layer includes a nitride of an alloy of the metal, aluminum, and silicon.

IPC Classes  ?

• B26D 1/00 - Cutting through work characterised by the nature or movement of the cutting member; Apparatus or machines therefor; Cutting members therefor
• B26D 1/143 - Cutting through work characterised by the nature or movement of the cutting member; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis

Abstract

A material storage system, a suction apparatus, and a material storage system control method. The material storage system comprises a material storage mechanism (1), which is provided with a first material bin (11) and a second material bin (12) and is capable of receiving materials through a feed port (2); a feeding and distributing mechanism (3), which is arranged on a material movement path between the material storage mechanism (1) and the feed port (2) and is configured to selectively make the feed port (2) be in communication with the first material bin (11) or the second material bin (12), so that the first material bin (11) or the second material bin (12) receives the materials through the feed port (2); a discharging mechanism (4), which is operably connected to the first material bin (11) and the second material bin (12) and is configured to selectively switch the first material bin (11) and the second material bin (12) between being open and being closed, so that the materials are discharged from the first material bin (11) or the second material bin (12); and a processor (5), which is in signal connection with the feeding and distributing mechanism (3) and the discharging mechanism (4) and is configured to switch the material storage mechanism (1) between a first operating state and a second operating state by means of the feeding and distributing mechanism (3) and the discharge mechanism (4), so that in the first operating state of the material storage mechanism (1), the material storage mechanism (1) receives the materials by means of the first material bin (11) and discharges the materials by means of the second material bin (12), and in the second operating state of the material storage mechanism (1), the material storage mechanism (1) receives the materials by means of the second material bin (12) and discharges the materials by means of the first material bin (11).

IPC Classes  ?

• B65G 53/66 - Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
• B65G 53/36 - Arrangements of containers
• B65G 53/28 - Systems utilising a combination of gas pressure and suction
• B65G 53/56 - Switches
• B65G 53/50 - Pneumatic devices

Abstract

The present application provides a control box, comprising: a primary box, comprising a first box body and a handle, wherein the handle is arranged on the first box body; and a secondary box, comprising a second box body and an electrical device, wherein the electrical device is arranged on the second box body, and the second box body is connected to the side of the first box body in the left-right direction or the front-back direction of a construction machine and is supported by the first box body. On this basis, the space occupied by the control box can be effectively reduced.

IPC Classes  ?

• H05K 5/02 - Casings, cabinets or drawers for electric apparatus - Details
• E02F 9/22 - Hydraulic or pneumatic drives

Abstract

Provided are an integrated valve and methods for designing and fabricating a valve body of the integrated valve. The method for designing the valve body (30) of the integrated valve comprises: according to a hydraulic function implemented by the integrated valve, determining an internal flow channel structure of a valve body model of the integrated valve (S10); according to positions and connection means of external devices connected to the integrated valve, determining positions and sizes of mounting structures, on the valve body model, cooperating with the external devices (S20); according to the internal flow channel structure and the positions and sizes of the mounting structures, determining an effective working structure of the valve body model (S30); according to the center lines of flow channels in the internal flow channel structure, determining an internal connection surface of the valve body model, and according to the internal connection surface, determining an internal support platform (34) formed to support the effective working structure (S40); and determining an external housing (31) of the valve body model, and connecting the external housing (31) to both the effective working structure and the internal support platform (34) (S50).

IPC Classes  ?

• F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
• G06F 30/17 - Mechanical parametric or variational design

Abstract

Provided are a method and device for controlling a vehicle and a vehicle, and relates to the technical field of automatic driving. The method for controlling a vehicle includes: obtaining current state information of the vehicle, wherein the state information includes a position information and an attitude information; determining a preview tracking point from a plurality of path points of a target path to be tracked by the vehicle based on a reference information, wherein the reference information includes a preview time; determining a first turning angle and a second turning angle of a front wheel of the vehicle based on the position information and the attitude information, wherein the first turning angle is used for eliminating a distance error between the vehicle and the preview tracking point, and the second turning angle is used for eliminating a heading error between the vehicle and the preview tracking point; and performing a weighting calculation on the first turning angle and the second turning angle to determine a target turning angle for controlling the front wheel, wherein a minimum distance among a plurality of distances between the vehicle and the plurality of path points is a first distance, and at least one parameter of the preview time or a weight corresponding to the first turning angle is positively correlated with the first distance in a case where the first distance is within a preset distance range.

IPC Classes  ?

• B60W 60/00 - Drive control systems specially adapted for autonomous road vehicles
• B60W 40/10 - Estimation or calculation of driving parameters for road vehicle drive control systems not related to the control of a particular sub-unit related to vehicle motion
• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits

Abstract

The present disclosure belongs to the technical field of engineering machinery and relates to an engineering machinery equipment modeling method and apparatus. The engineering machinery equipment modeling method comprises the following steps: in response to a modeling request of a user, determining a subsystem that matches the user from a plurality of subsystems of the engineering machinery equipment; displaying to the user a modeling page of the subsystem that matches the user; constructing a model of the subsystem of the engineering machinery equipment on the modeling page on the basis of a model library which can be used by the user; and adding the subsystem model of the engineering machinery equipment into the model library. Modeling efficiency of engineering machinery equipment can be improved by means of the present method.

IPC Classes  ?

• G06F 30/17 - Mechanical parametric or variational design

Abstract

The present disclosure relates to a backhoe loader for efficient digging. The backhoe loader includes: a vehicle body, including a first vehicle body and a second vehicle body which are connected sequentially; a loading device, arranged on the first vehicle body; a control platform, arranged on the second vehicle body and configured to rotate by 360° relative to the second vehicle body; a cab, arranged on a first side of the control platform; and an excavating device, arranged on a second side of the control platform opposite to the first side, the excavating device being configured to rotate by 180° relative to the cab. The backhoe loader can realize functions of 360° excavating and bidirectional driving. When the excavating device works, the backhoe loader can be directly moved by folding stabilizers and without changing the position of a seat back and forth, so that the excavating efficiency is improved.

IPC Classes  ?

• E02F 9/08 - Superstructures; Supports for superstructures
• E02F 9/12 - Slewing or traversing gears
• E02F 9/16 - Cabins, platforms, or the like for the driver

Abstract

A meshing structure for plate welding, and a tack-free welding device and method are provided. The device comprises a connecting frame, a welding gun, and a cutting mechanism, the welding gun is fixed on the connecting frame, and the cutting mechanism is connected to the connecting frame. The meshing structures are disposed on welded plates, and after being assembled, the two plates can be restrained by the meshing structures in multiple dimensions. Before welding, edges of the plates are cut according to the form of the meshing structures, then the plates are assembled and meshed; after the position of the welding gun is adjusted, the cutting mechanism and the welding gun are driven by a welding robot or a special welding machine to move along a weld; and the meshing structures are removed by the cutting mechanism, and then normal welding is performed by the welding gun.

IPC Classes  ?

• B23K 37/00 - Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the other main groups of this subclass
• B23K 26/38 - Removing material by boring or cutting
• B23K 28/02 - Combined welding or cutting procedures or apparatus

Abstract

An aerial work platform for a fire fighting vehicle includes: a carrying component; a work platform body mounted on the carrying component and swingable relative to the carrying component to adjust the levelness of the work platform body; a hydraulic actuating element connected to the carrying component and the work platform body, respectively, and configured to drive the work platform body to swing relative to the carrying component; and a hydraulic power unit including a hydraulic pump and a first reversing valve fluidly connected to the hydraulic pump, the first reversing valve being fluidly connected to the hydraulic actuating element, the hydraulic power unit including a first component, the first component being formed with a first pump cavity accommodating a pumping component of the hydraulic pump and a first reversing valve cavity accommodating a valve core of the first reversing valve.

IPC Classes  ?

• B66F 11/04 - Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
• A62C 27/00 - Fire-fighting land vehicles

Abstract

The present invention relates to a hydraulic cylinder guide ring, which comprises a ring body having a first material, wherein the ring body has a working surface, the working surface is provided with a roll-ball groove thereon, and a roll ball having a second material is mounted inside the roll-ball groove. The first material has the following properties: the tensile strength is 100-120 MPa, the 150°C compression strength is 70-85 MPa, the hardness is 80-86 HRM, the friction coefficient is 0.15-0.2, and the load deformation temperature is 220-240°C; and the second material has the following properties: the tensile strength is 130-150 MPa; the 150°C compression strength is 100-110 MPa; the hardness is 90-100 HRM; the friction coefficient is 0.1-0.14; and the load deformation temperature is 250-270°C.

IPC Classes  ?

• F15B 15/14 - Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
• F15B 15/20 - Other details

Abstract

An energy recovery and reuse system for a loader-digger and a control method therefor, and a loader-digger. The system comprises: an actuation mechanism (2), which is configured to drive a working device to perform actions using hydraulic oil as a medium and has a first chamber (21) and a second chamber (22); a reversing valve (1), which has a first working oil port (E) and a second working oil port (F), the first working oil port (E) being in communication with the first chamber (21), and the second working oil port (F) being in communication with the second chamber (22), and the reversing valve (1) being configured for the reversing of the actuation mechanism (2); a stabilizing valve group (3), which has a first oil port (A), a second oil port (B), a third oil port (C) and a fourth oil port (D), the first oil port (A) and the second oil port (B) being respectively in communication with the first chamber (21) and the second chamber (22), and the third oil port (C) being in communication with an oil tank (4); and an energy storage component (5), which is in communication with the fourth oil port (D) and configured to store hydraulic energy, wherein the first oil port (A) and the third oil port (C) have a first communication state in which hydraulic oil in the first chamber (21) can enter the oil tank (4); and the second oil port (B) and the fourth oil port (D) can be selectively connected or disconnected, and in the connected state, the second chamber (22) is in communication with the energy storage component (5).

IPC Classes  ?

• F15B 1/02 - Installations or systems with accumulators
• F15B 11/16 - Servomotor systems without provision for follow-up action with two or more servomotors
• F15B 13/06 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
• F15B 21/02 - Servomotor systems with programme control derived from a store or timing device; Control devices therefor
• F15B 21/14 - Energy-recuperation means
• E02F 9/22 - Hydraulic or pneumatic drives
• E02F 3/36 - Component parts

Abstract

The present disclosure relates to a turntable assembly and an engineering mechanical apparatus. The turntable assembly for an engineering mechanical apparatus comprises: a turntable body (10); a first slewing mechanism (20), connected to the turntable body (10) and configured to drive the turntable body (10) to rotate relative to an undercarriage of the engineering mechanical apparatus; and a second slewing mechanism (30), connected to the turntable body (10) and configured to drive a upper carriage working device (40) of the engineering mechanical apparatus to rotate relative to the turntable body (10), wherein the rotation axis (21) of the first sewing mechanism (20) is not collinear with the rotation axis (35) of the second slewing mechanism (30), the second slewing mechanism (30) comprises a slewing body (31) for connecting to the upper carriage working device (40), and at least two hinge points arranged at intervals along the rotation axis (35) of the second slewing mechanism (30) are provided between the slewing body (31) and the turntable body (10).

IPC Classes  ?

• E02F 9/08 - Superstructures; Supports for superstructures

Abstract

A pneumatic conveying system having adjustable fans in series/parallel and positive/negative pressure, and a control method therefor. The system comprises a power unit (1), a fan unit (2), a valve unit (3), a sensor unit (4), a pneumatic conveying unit (5), a pipeline arrangement net (6) and a control system (7), wherein the fan unit (2), the valve unit (3), the sensor unit (4) and the pneumatic conveying unit (5) are connected together in an ordered manner by means of the pipeline arrangement net (6), so as to form a whole.

IPC Classes  ?

• B65G 53/50 - Pneumatic devices
• B65G 53/46 - Gates or sluices, e.g. rotary wheels
• B65G 53/24 - Gas suction systems
• B65G 53/52 - Adaptations of pipes or tubes
• B65G 43/08 - Control devices operated by article or material being fed, conveyed, or discharged

Abstract

The present invention relates to a hydraulic cylinder guide ring, comprising a ring body made of a first material, wherein the ring body is provided with a working face, a groove is formed in the working face, and the groove is filled with a second material; the compression strength of the first material is greater than that of the second material; and the coefficient of friction of the second material is less than that of the first material.

IPC Classes  ?

• F15B 15/20 - Other details
• B29D 22/04 - Spherical articles, e.g. balls

Abstract

An automatic driving method, apparatus, and system, and a computer-readable storage medium, relating to the field of agricultural machinery automatic driving. The automatic driving method comprises acquiring a path line traveled in a current row by an agricultural machine and an image of an agricultural implement, connected to the agricultural machine, in an area having been operated on of the current row (S1); according to the image of the agricultural implement in the area having been operated on of the current row, determining the boundary of the agricultural implement in the area having been operated on of the current row (S2); according to the path line travelled in the current row by the agricultural machine and the boundary of the agricultural implement in the area having been operated on of the current row, determining the operating width of the agricultural implement (S3), the operating width of the agricultural implement comprising the operating width of the agricultural implement on at least one side among both sides of the traveled path line; and according to the operating width of the agricultural implement and an empty space between the current row and a next row, determining the distance between the traveling path line of the agricultural machine in the next row and the traveling path line of the agricultural machine in the current row (S4). The calibration precision of the operating width of the agricultural implement is improved, and reasonable crop spacing is ensured.

IPC Classes  ?

• G01C 21/34 - Route searching; Route guidance

Abstract

Disclosed in the present invention is an oscillating laser welding equivalent heat source modeling method, comprising: constructing energy distribution cloud maps of an actual laser welding heat source under different oscillating trajectories, oscillating frequencies and oscillating amplitudes; extracting an energy distribution curve along the direction of the center position of the heat source, and acquiring spatial position information of multiple target points of interest; constructing an equivalent Gaussian heat source model for each target point of interest; and performing matching degree verification on the Gaussian heat source models and the actual laser welding heat source, and using the Gaussian heat source model that passes the verification as an equivalent heat source model of the actual laser welding heat source. The present invention further provides an oscillating laser welding simulation method, which comprises constructing an equivalent heat source model by using the modeling method, and performing welding simulation on the basis of the equivalent heat source model. The present invention can greatly shorten a heat source check period during oscillating laser welding simulation, and improve the simulation efficiency of the whole oscillating laser welding.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• B23K 26/24 - Seam welding

Abstract

The present disclosure provides a modular excavator, including a plurality of assembly modules that are detachably connected, the plurality of assembly modules including: a frame turntable base module; a track beam assembly module connected to the frame turntable base module; a track module connected to the track beam assembly module; a slewing drive module connected to the frame turntable base module; a power assembly module connected to the frame turntable base module; a counterweight module connected to the power assembly module; a cab module connected to the frame turntable base module; a fuel tank module connected to the frame turntable base module; a boom assembly module connected to the frame turntable base module; a bucket arm assembly module connected to the boom assembly module; and a work tool module connected to the bucket arm assembly module.

IPC Classes  ?

• E02F 3/32 - Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
• E02F 3/36 - Component parts
• E02F 9/02 - Travelling gear
• E02F 9/08 - Superstructures; Supports for superstructures
• E02F 9/12 - Slewing or traversing gears
• E02F 9/16 - Cabins, platforms, or the like for the driver
• E02F 9/18 - Counterweights

Abstract

A hub directly driven by a motor and used for a heavy-duty chassis dynamometer includes a hub body, wherein a mounting surface is arranged on an inner circumference of the hub body and is disposed around a transmission shaft coaxial with the hub body, the transmission shaft is sleeved with a driving assembly, and bearing assemblies are disposed on two sides of the driving assembly in an axial direction respectively; a plurality of axial mounting plates are disposed on an outer circumference of the driving assembly, and tension sensor assemblies are connected to the axial mounting plates located outside the hub body and are mounted on the support frame; and an end, away from the mounting surface, of the transmission shaft, is sleeved with an end flange plate, and a plurality of brake assemblies are disposed on the end flange plate and are mounted on the support frame.

IPC Classes  ?

• G01L 3/16 - Rotary-absorption dynamometers, e.g. of brake type

Abstract

A heavy-duty, high-power and large-torque chassis dynamometer for a multi-environmental system, comprising a power testing platform disposed on the ground and a rack located below the power testing platform. A fixed base and a sliding base are sequentially disposed on an inner side of the rack in a length direction of the power testing platform, a pair of first hub assemblies are mounted on the fixed base through a plurality of support frames, a sliding platform is disposed on the sliding base, and a pair of second hub assemblies are mounted on the sliding platform through a plurality of support frames. Tension sensor assemblies are connected to outer circumferences of the first hub assemblies and outer circumferences of the second hub assemblies, and are fixedly disposed on the support frames.

IPC Classes  ?

• G01L 5/13 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles

Abstract

An autonomous vehicle control method and apparatus (100, 700), and an operation system (800). The autonomous vehicle control method comprises: acquiring an alternative safe travel destination of a first autonomous vehicle; when it is determined that, during traveling on the basis of the alternative safe travel destination, the first autonomous vehicle does not conflict with another autonomous vehicle, determining the alternative safe travel destination to be a new safe travel destination; and issuing the new safe travel destination to the first autonomous vehicle, so as to instruct the first autonomous vehicle to move to the new safe travel destination. The method is suitable for a cooperative operation of multiple autonomous vehicles in a working area, and guarantees that the autonomous vehicles travel in order in the working area, thereby guaranteeing the operation efficiency in the working area when no safety accidents may occur.

IPC Classes  ?

• G05D 1/02 - Control of position or course in two dimensions

Abstract

A loader-excavator control method and a loader-excavator, relating to the field of engineering machinery. The loader-excavator control method comprises the following steps: setting power upper limit thresholds P0 of a variable displacement pump (2) of a loader-excavator according to working modes of the loader-excavator, wherein the loader-excavator comprises an engine (1), the variable displacement pump (2), a traveling system (3), a loading operation system (4), and an excavation operation system (5), and the working modes comprise a traveling mode, a loading operation mode, and an excavation operation mode; and adjusting the power upper limit threshold P0 of the variable displacement pump (2) according to the actual load of the loader-excavator in the current working mode. The power upper limit thresholds P0 set in different working modes are different; and the real-time, stepless and continuous adjustment of power of the variable displacement pump (2) is implemented according to the actual load condition of the system, so that output power of the engine (1) is utilized to the maximum extent, thereby improving the working efficiency, improving the energy efficiency, and reducing the energy consumption.

IPC Classes  ?

• E02F 9/22 - Hydraulic or pneumatic drives

Abstract

A fire-extinguishing robot, a fire-extinguishing robot group and a fire-extinguishing method, which relate to the field of fire-fighting apparatuses, and are configured to improve the structure and performance of the fire-extinguishing robot. The fire-extinguishing robot comprises a travelling mechanism (1), a frame (2) and a water-receiving portion (3), wherein the travelling mechanism is configured to travel; the frame is mounted on the travelling mechanism; the water-receiving portion is mounted on the periphery of the frame and encircles the periphery of the frame; the water-receiving portion comprises a cavity (30) for accommodating a fire-extinguishing agent; and the cavity is open. It is not necessary for the fire-extinguishing robot to receive the externally conveyed fire-extinguishing agent by means of a water hose, but the fire-extinguishing robot is provided with the water-receiving portion, which is open and can receive the fire-extinguishing agent aerially sprayed down, and the fire-extinguishing robot sprays, by means of a fire monitor (10) thereof, out the fire-extinguishing agent received by the water-receiving portion thereof, so as to extinguish fire or provide the fire-extinguishing agent to a downstream fire-extinguishing robot. The fire-extinguishing robot has a compact structure and a small load, and can achieve remote spraying fire-extinguishing at any distance.

IPC Classes  ?

• A62C 27/00 - Fire-fighting land vehicles

Abstract

A method, device and system for updating a map of an unloading area (UA) of an open pit mine, which relate to the technical field of open pit mines. The method includes: acquiring one or more coordinates of one or more first preset positions of auxiliary operation equipment (11) during an operation (302), wherein the auxiliary operation equipment (11) trims a retaining wall (L) that acts as a physical boundary of the unloading area (UA) during the operation, and during the operation of the auxiliary operation equipment (11), each first preset position is located within the unloading area (UA); determining a first coordinate set (304), the first coordinate set (304) including coordinates among the one or more coordinates located outside of a first map of the unloading area (UA); and according to the first coordinate set (304), updating the first map into a second map (306).

IPC Classes  ?

• G01C 21/00 - Navigation; Navigational instruments not provided for in groups

Abstract

A vehicle control method and apparatus, and a vehicle, a computer-readable storage medium and a program product, which relate to the technical field of autonomous driving. The method comprises: acquiring the current state information of a vehicle, wherein the state information comprises position information and pose information; according to reference information, determining a preview tracking point from among a plurality of path points of a target path to be tracked by the vehicle, wherein the reference information comprises a preview time; determining a first rotation angle and a second rotation angle of a front wheel of the vehicle according to the position information and the pose information, wherein the first rotation angle is used for eliminating a distance error between the vehicle and the preview tracking point, and the second rotation angle is used for eliminating a heading error between the vehicle and the preview tracking point; and performing weighted calculation on the first rotation angle and the second rotation angle, so as to determine a target rotation angle used for controlling the front wheel, wherein the shortest distance among a plurality of distances between the vehicle and the plurality of path points is a first distance, and when the first distance is within a preset distance range, at least one parameter of the preview time and a weight corresponding to the first rotation angle is positively correlated with the first distance.

IPC Classes  ?

• B60W 60/00 - Drive control systems specially adapted for autonomous road vehicles

Abstract

A pneumatic conveying system and an optimal configuration method. The pneumatic conveying system conveys materials through a pressure-conveying type elephant trunk conveying pipeline (7) or a suction-conveying type elephant trunk conveying pipeline (18), wherein the pressure-conveying type elephant trunk conveying pipeline is a pipeline having a gradually enlarged inner diameter, and the suction-conveying type elephant trunk conveying pipeline is a pipeline having a gradually reduced inner diameter, such that a conveying distance can be prolonged under the condition that power and a fan system are unchanged, or the requirements for power and for fan system performance can be reduced and internal friction in the system can be reduced under the condition that the conveying distance is unchanged.

IPC Classes  ?

• B65G 53/58 - Devices for accelerating or decelerating flow of the materials; Use of pressure generators

Abstract

The present disclosure relates to an engineering vehicle driving system, a driving method, and an engineering vehicle. The engineering vehicle driving system comprises front wheels, rear wheels, a driving device, a first drive axle, a second drive axle, a first pressure measurement device, a first calculation device, a speed acquisition device and a driving distribution device, wherein the first drive axle is connected between the driving device and the front wheels; the second drive axle is connected between the driving device and the rear wheels; the first pressure measurement device measures pressure loads of the first drive axle and the second drive axle; the first calculation device calculates the difference between the speeds of the front wheels and the rear wheels; the speed acquisition device acquires the traveling speed of an engineering vehicle; the driving distribution device is in signal connection with the first pressure measurement device, the first calculation device and the speed acquisition device; and the driving distribution device adjusts a driving mode of the engineering vehicle driving system according to the pressure loads of the first drive axle and the second drive axle, the difference between the speeds of the front wheels and the rear wheels, and the traveling speed.

IPC Classes  ?

• B60K 17/34 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
• B60K 17/354 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having separate mechanical assemblies for transmitting drive to the front or to the rear wheels or set of wheels
• B60W 30/182 - Selecting between different operative modes, e.g. comfort and performance modes
• B60C 23/04 - Signalling devices actuated by tyre pressure mounted on the wheel or tyre

Abstract

Disclosed are an optimization design method for a ROPS frame top beam, and a construction machine cab. The design method comprises: by means of analyzing the bending moment stress value of a mechanical model of a portal-type statically indeterminate structure, obtaining a ratio of a moment of inertia I between a top beam and a column when the maximum bending moment stresses of the top beam and the column are equal, i.e., an optimum ratio relationship of a cross-sectional moment of inertia of the top beam and the column, so as to realize lightweight design of a ROPS frame.

IPC Classes  ?

• B62D 33/06 - Drivers' cabs
• E02F 9/16 - Cabins, platforms, or the like for the driver
• G06F 30/15 - Vehicle, aircraft or watercraft design
• G06F 30/20 - Design optimisation, verification or simulation
• B60R 21/13 - Roll-over protection

Abstract

Disclosed in the present invention are an optimization design method for a middle cross beam of a ROPS framework, and an engineering machinery cab. The design method comprises: by analyzing the influence of the height dimension of a middle cross beam in a portal statically indeterminate structure mechanical model on a distribution relationship between two bending moments of a column, calculating the height dimension of the middle cross beam when the maximum bending moment of the column is minimum, and obtaining an optimal height dimension relational expression of the middle cross beam; and by analyzing a design objective that the middle cross beam and the column simultaneously enter a plastic deformation region, obtaining a profile cross section parameter design relational expression of the middle cross beam, and using the relational expression to guide the structure and profile type selection of the ROPS framework, so as to improve the design quality of the ROPS framework.

IPC Classes  ?

• G06F 30/15 - Vehicle, aircraft or watercraft design
• G06F 30/17 - Mechanical parametric or variational design
• G06F 30/20 - Design optimisation, verification or simulation
• G06F 119/14 - Force analysis or force optimisation, e.g. static or dynamic forces

Abstract

maxmaxmaxmaxmax, calculating the sum of section modulus of the profiles of all upright columns and top cross beams, selecting proper profiles according to the sum, and building a closed space frame structure by using the selected cab framework structure type.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• B62D 33/06 - Drivers' cabs
• E02F 9/16 - Cabins, platforms, or the like for the driver
• G06F 119/14 - Force analysis or force optimisation, e.g. static or dynamic forces
• G06F 30/17 - Mechanical parametric or variational design

Abstract

A design method for a control box of construction machinery. The method comprises: determining mounting positions of at least two handles (12) on a box body (101) of a control box (10); and designing the control box on the basis of the determined mounting positions of the at least two handles on the box body of the control box, so that the control box satisfies the requirement of the at least two handles for mounting. On this basis, the universality and later expandability of the control box can be improved, and the production costs can be reduced. The present application further relates to a control box obtained by means of the design method for a control box of a construction machinery, and construction machinery.

IPC Classes  ?

• F16H 59/08 - Range selector apparatus

Abstract

A device for detecting the elongation of a hydraulic cylinder includes an electric signal conversion device, a ruler and a positional magnetic ring. The electric signal conversion device is disposed at the bottom of a cylinder barrel. The ruler has an end fixedly connected to the electric signal conversion device, as well as the other end movably extending into a piston rod. The positional magnetic ring is fixedly connected to a piston and the positional magnetic is movably disposed around the periphery of the ruler. When the positional magnetic ring is located at different positions of the ruler, different circuits are turned on to transmit a voltage or current signal corresponding to the positions of the ruler to the electric signal conversion device, so as to obtain a position of the positional magnetic ring on the ruler, such that the elongation of the piston rod is obtained.

IPC Classes  ?

• F15B 15/28 - Means for indicating the position, e.g. end of stroke

Abstract

The present disclosure provides a method for obtaining a milling particle gradation prediction model, a prediction method and a device. The method includes: sieving a plurality of groups of test particles obtained by a plurality of milling tests to obtain a sieve residual mass ratio corresponding to each of a plurality of sieves after performing milling tests on an asphalt layer; calculating a characteristic parameter of a cutting graph of the milling rotor according to arrangement of cutter teeth of the milling rotor, a rotational speed, a forward speed, and a milling depth of the milling rotor; establishing, by regression analysis, a functional relation between the sieve residual mass ratio corresponding to each sieve and the characteristic parameter according to the rotational speed, the forward speed and the milling depth; and normalizing the functional relation to obtain the milling particle gradation prediction model.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• E01C 23/06 - Devices or arrangements for working the finished surface; Devices for repairing the surface of damaged paving

Abstract

A device, optimization method and system for cooperative matching of heat dissipation and noise are disclosed. A hood is mounted on a base, and a power device, a fan and a radiator are mounted in the hood; an output shaft of the power device is fixedly connected to a rotary shaft of the fan through a bearing pedestal to drive the fan to rotate, and the bearing pedestal is fixed on the base; the radiator is fixed on a radiator support, and a lead screw assembly is disposed on the base, and is used for changing the relative distance between the radiator and the fan; and a fan cover is mounted on a side, facing the fan, of the radiator, and a plurality of anemographs are disposed on the other side of the radiator, and a plurality of microphones are symmetrically disposed on two sides of the fan.

IPC Classes  ?

• F04D 27/00 - Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids

Abstract

A cutter holder measuring tool includes: a base with a positioning point configured to be detected by a detecting device; and a mounting assembly, including a sleeve, a positioning pin and an end plate, wherein two axial ends of the sleeve are connected to the base and the end plate respectively, the end plate is configured to abut against a mounting surface of a cutter holder of a milling rotor, the mounting surface is a surface, facing a tip of a cutter, of the cutter holder, the positioning pin is inserted into the sleeve and a mounting hole, for the cutter to insert, of the cutter holder, the positioning pin is movable along an axial direction of the sleeve, and a diameter of the positioning pin changes along the axial direction of the sleeve, so a center of the positioning pin is collinear with a center of the mounting hole.

IPC Classes  ?

• B23Q 17/22 - Arrangements for indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
• B23Q 17/00 - Arrangements for indicating or measuring on machine tools
• B23Q 17/24 - Arrangements for indicating or measuring on machine tools using optics

Abstract

A tractor rear suspension vibration damping control system, relating to the technical field of tractor rear suspension vibration control. The system comprises: a tractor operation parameter acquisition device for acquiring an operation parameter of a tractor; a controller (11) for sending a control signal to an execution mechanism according to the acquired operation parameter of the tractor and a set vibration damping control policy; the execution mechanism for controlling, according to the control signal sent by the controller (11), the amount of a hydraulic fluid flowing into or out from a rodless cavity of a suspension cylinder (8) of a tractor rear suspension mechanism, so that the tractor rear suspension mechanism performs vibration damping during a transfer process and is kept in a set damping range, thereby effectively controlling the vibration of a tractor rear suspension, improving the driving comfort of an operator, and avoiding a safety problem caused by overlarge vibration. The present invention also relates to a tractor.

IPC Classes  ?

• A01B 63/114 - Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements to achieve a constant working depth
• A01B 59/041 - Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor preventing or limiting side-play of implements
• F16F 9/19 - Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder
• F16F 9/512 - Means responsive to load action on the damper or fluid pressure in the damper
• F16F 15/023 - Suppression of vibrations of non-rotating, e.g. reciprocating, systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating system using fluid means

Abstract

The present disclosure relates to a travel stability system, a backhoe loader and a control method. The travel stability system includes: a hydraulic actuator; a first hydraulic oil source, operatively connected with the hydraulic actuator, and configured to provide pressure oil to the hydraulic actuator; an energy storage element operatively connected with a first oil supply path between the first hydraulic oil source and the hydraulic actuator; and a controller configured to compare an oil pressure of the hydraulic actuator with an oil pressure of the energy storage element after the travel stability system is turned on, and achieve a balance between the oil pressure of the energy storage element and the oil pressure of the hydraulic actuator before the energy storage element is accessed to the first oil supply path.

IPC Classes  ?

• E02F 9/22 - Hydraulic or pneumatic drives

Abstract

The present disclosure relates to an emergency rescue vehicle and a mounting method thereof. The emergency rescue vehicle comprises a chassis (100) and an upper vehicle (200) which are relatively independent and can be connected to each other. The chassis (100) comprises a rotary base module (M1), a left hinge body module (M2), a right hinge body module (M3), a central rotary body module (M4), a rotary bearing module (M5), a left front leg module (M6), a right front leg module (M7), a left rear leg module (M8), a right rear leg module (M9), a left rear wheel module (M10), a right rear wheel module (M11) and a chassis oil cylinder module (M12) which are relatively independent and can be connected according to a preset sequence, wherein the left front leg module (M6) comprises a left front leg (M6-1) and a left front wheel (M6-2), and the right front leg module (M7) comprises a right front leg (M7-1) and a right front wheel (M7-2). According to the present disclosure, the chassis is divided into 12 independent small modules, so that water, land and air multi-way convenient transportation can be met, quick and flexible delivery of an emergency rescue vehicle is realized, and assembly and disassembly are convenient.

IPC Classes  ?

• E02F 9/08 - Superstructures; Supports for superstructures
• E02F 9/12 - Slewing or traversing gears
• E02F 9/02 - Travelling gear
• E02F 9/20 - Drives; Control devices
• E02F 3/32 - Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
• E02F 3/38 - Cantilever beams; Dipper-arms; Bucket-arms
• E02F 3/42 - Drives for dippers, buckets, dipper-arms or bucket-arms

Abstract

A bucket coordinate calibration method and apparatus, an updating method and device, and an excavator. The bucket coordinate calibration method comprises: acquiring angle sensor data and radar point cloud data of a bucket (step 21); determining the coordinates of bucket teeth in the bucket under the coordinate system of the radar and according to the radar point cloud data of the bucket (step 22); determining the coordinates of the bucket teeth in the bucket under the coordinate system of the excavator and according to the angle sensor data of the bucket (step 23); and determining a coordinate calibration matrix according to the coordinates of the bucket teeth in the bucket under the radar coordinate system and under the excavator coordinate system (step 24), wherein the coordinate calibration matrix is a calibration matrix that calibrates the coordinates of the bucket teeth in the bucket under the radar coordinate system to coordinates in the excavator coordinate system. The present method can utilize a laser radar and an excavator angle sensor, and bucket coordinates are calibrated without adding external calibration equipment.

IPC Classes  ?

• G01B 11/00 - Measuring arrangements characterised by the use of optical techniques
• G01S 17/06 - Systems determining position data of a target

Abstract

The present application provides a medium-carbon low-alloy steel material, a conveying pipe, a preparation method for the medium-carbon low-alloy steel material, and a concrete pump truck. The medium-carbon low-alloy steel material is made up of the following chemical components in percentage by mass: C: 0.55-0.60 %, Mn: 0.80-1.40 %, Si: ≤ 0.3 %, Cr: 0.2-0.4 %, Ni: 0.2-0.4 %, P: ≤ 0.020 %, S: ≤ 0.020 %, Ti: 0.04-0.10 %, V: 0.05-0.15 %, Re: 0.001-0.003 %, and the balance being Fe. On the basis of controlling the contents of principal chemical components C, Mn, Si, Cr, and Ni, and by means of utilizing micro-alloying elements Ti, V, and Re and controlling the amounts of each used, the goal of improving the toughness and wear resistance of the material is improved, and consequently the impact resistance of a conveying pipe formed from said material is improved, and wear and tear on the pipe is mitigated.

IPC Classes  ?

• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
• C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
• C21D 9/14 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes
• C21D 1/18 - Hardening; Quenching with or without subsequent tempering
• C21D 6/00 - Heat treatment of ferrous alloys
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• E04G 21/04 - Devices for both conveying and distributing
• F16L 9/02 - Rigid pipes of metal

Abstract

The present disclosure belongs to the technical field of engineering machinery and relates to an engineering machinery equipment modeling method and apparatus. The engineering machinery equipment modeling method comprises the following steps: in response to a modeling request of a user, determining a subsystem that matches the user from a plurality of subsystems of the engineering machinery equipment; displaying to the user a modeling page of the subsystem that matches the user; constructing a model of the subsystem of the engineering machinery equipment on the modeling page on the basis of a model library which can be used by the user; and adding the subsystem model of the engineering machinery equipment into the model library. Modeling efficiency of engineering machinery equipment can be improved by means of the present method.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• G06Q 30/06 - Buying, selling or leasing transactions

Abstract

A windscreen vision zone division device and method. The device comprises a guide rail (1), a sliding block base (2), a translation mechanism, a lifting mechanism and a horizontal angle meter (3). The sliding block base (2) is in sliding connection to the guide rail (1), and a laser emission assembly is provided on the sliding block base (2). A laser emission seat (4) is provided with a guide rod (6); and a laser range finder (7), which is used for measuring the distance between a laser emitter (5) and a cab floor, is slidably connected to the guide rod (6). The present invention is suitable for vision zone division of various vehicle windscreens, can avoid error influence caused by human operation, has higher precision and simple operation, may improve division efficiency and is suitable for vision zone division of a cab having a plurality pieces of windscreen glass.

IPC Classes  ?

• G01M 17/007 - Wheeled or endless-tracked vehicles

Abstract

The present disclosure relates to an electroosmosis adhesion reduction system positive electrode module, an electroosmosis adhesion reduction system and an engineering machinery, relating to the field of engineering machinery, and used for reducing adhesion of materials. The electroosmosis adhesion reduction system positive electrode module comprises an insulating part, a positive electrode and a conduction part. The insulating part comprises a through hole; the positive electrode is mounted in the through hole, and one end of the positive electrode extends out of the through hole; the conduction part is electrically connected to the other end of the positive electrode; and at least part of the conduction part is located on the outer side of the through hole. The positive electrode module provided in the described technical solution is matched with an existing conductive cover body of a device to form an electrical loop, so as to form a water on the surface of the cover body prone to medium adhesion, thereby reducing the possibility of the medium adhering to the cover body. Moreover, the electroosmosis adhesion reduction system positive electrode module is automatically completed in the working process of the device, there is no need for separately arranging a step and process of removing an adhered object, and the working efficiency of the device is greatly improved.

IPC Classes  ?

• E01C 23/088 - Rotary tools, e.g. milling drums
• H01R 11/11 - End pieces or tapping pieces for wires or cables, supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member

Abstract

A modular design gearbox and a gear implementation method are provided. The gearbox includes a body, a drive shaft, four intermediate shafts, and an output shaft. The gearbox is of a six-shaft layout. The drive shaft S1, the intermediate shaft S4 and the intermediate shaft S5 are each provided with two clutch packs, and the intermediate shaft S2 is provided with one clutch pack. According to such a structure, a transmission path is short, and stability is better. By means of six shafts and seven clutches, the gearbox achieves a mode of up to eight forward gears and four backward gears, a speed ratio range is wide, and the gearbox can be adjusted flexibly, a less-gear mode can be achieved by reducing some of components, modularization is achieved, universality is improved, and the production cost and use cost of the gearbox are reduced.

IPC Classes  ?

• F16H 3/093 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously- meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears with two or more countershafts
• F16H 3/00 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion

Abstract

The present disclosure discloses a rotary frame and a grader, and relates to the field of a grader. The rotary frame includes: a rotary ring, provided with a recessed portion and an opening; a first connecting piece fixed at the periphery of the rotary ring, one end of the first connecting piece being attached to the periphery of the rotary ring and the other end of the first connecting piece being separated from the periphery of the rotary ring; a second connecting piece, the second connecting piece being also fixed at the periphery of the rotary ring, and one end of the second connecting piece being attached to the periphery of the rotary ring and the other end of the second connecting piece being separated from the periphery of the rotary ring; a supporting base fixed on an inner wall of the rotary ring and located in the recessed portion.

IPC Classes  ?

• E02F 3/80 - Component parts
• E02F 3/76 - Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling devices
• E02F 3/84 - Drives or control devices therefor

Abstract

The present application relates to an aluminum alloy, comprising the following elements in percentage by mass: Cu: 4.4-4.7, Li: 2.5-2.6, Mg: 0.8-1.0, Zn: 0.8-1.0, Zr: 0.2-0.25, Sc: 0.8-0.15, and the remaining is Al and inevitable impurities. The aluminum alloy is low in density, good in comprehensive mechanical property, good in forming and processing performance and high in weldability. At the same intensity level, the aluminum alloy can be used for replacing steel on a concrete pump truck boom.

IPC Classes  ?

• C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
• C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent

Abstract

The present disclosure relates to a method and system for measuring and calibrating steering parameters of a vehicle, a medium and an autonomous vehicle. The method includes: calculating a steering angle of a front wheel of the vehicle corresponding to each sampling moment at a plurality of consecutive sampling moments respectively. The calculation process at each sampling moment includes: calculating a first calculated value based on a yaw velocity of the vehicle, a vehicle velocity and a wheelbase; calculating a second calculated value based on a vehicle velocity, a lateral acceleration of the vehicle and the wheelbase; calculating a third calculated value based on a rotating angle of the steering wheel and a steering gear ratio; and calculating a steering angle of the front wheel at a current sampling moment based on the first, second and third calculated value of the steering angle of the front wheel.

IPC Classes  ?

• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
• B62D 15/02 - Steering position indicators

Abstract

Disclosed in the present invention are a method and a system for screening a plurality of simulation results of engineering machinery. The method comprises: acquiring a plurality of simulation results and evaluation indexes related to the simulation results; screening the evaluation indexes by using an Apriori algorithm, and constructing an evaluation index layer element set of an AHP algorithm; performing pairwise comparison judgment on the evaluation indexes in the evaluation index layer element set, and constructing an index evaluation matrix according to the AHP algorithm; after single sorting and consistency verification are performed on the index evaluation matrix, solving weight vectors of the index evaluation matrix, and then performing hierarchical total sorting on the solved weight vectors, so as to obtain weights of corresponding evaluation indexes; calculating, according to the weight, an evaluation score corresponding to each simulation result by adopting a fuzzy comprehensive evaluation method; and screening an optimal simulation result according to the evaluation score. The present invention has the beneficial effects that the method and a system for screening a plurality of simulation results of engineering machinery fusing the Apriori algorithm, the AHP algorithm and the fuzzy comprehensive evaluation method are provided.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation

Abstract

The invention discloses a method and system for detecting a retaining wall suitable for an automatic driving vehicle. The method comprises: obtaining original data acquired during a backing process of a vehicle and used for detecting a retaining wall, and processing the original data to obtain finally processed data of the retaining wall; obtaining ground data during the backing process of the vehicle, and sequentially performing ground determination and ground elimination on the ground data to obtain non-ground point cloud data; and obtaining distance information between a rear end of the vehicle and the retaining wall and integrity data of the retaining wall by calculation according to the finally processed data of the retaining wall and the non-ground point cloud data.

IPC Classes  ?

• G01S 17/931 - Lidar systems, specially adapted for specific applications for anti-collision purposes of land vehicles
• G01S 17/88 - Lidar systems, specially adapted for specific applications

Abstract

This disclosure relates to a manufacture method of a bushing, a bushing and an excavator to alleviate the problems of insufficient lubricity and wear resistance of the bushing. The bushing includes an inner ring and an outer ring. The manufacture method of the bushing includes the following steps: grinding a first mixed powder containing Fe, Al, Ti, Cr and V, nitriding the ground first mixed powder to form a nitrogen-rich stable compound powder, and then carrying out molding by pressing and sintering the nitrogen-rich stable compound powder to form the outer ring; grinding a second mixed powder containing Fe and Mo, sulfurizing the ground second mixed powder to form a sulfurized powder containing FeS and MoS2, and carrying out molding by pressing the sulfurized powder to form the inner ring; and placing the inner ring in the outer ring and carrying out sintering to obtain the bushing.

IPC Classes  ?

• B22F 7/06 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools
• B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
• B22F 3/16 - Both compacting and sintering in successive or repeated steps
• B22F 9/04 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
• B22F 9/16 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using chemical processes
• B22F 3/26 - Impregnating
• F16C 33/14 - Special methods of manufacture; Running-in
• F16C 33/12 - Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing

Abstract

Disclosed in the present invention are a method and system for detecting a retaining wall suitable for an automatic driving vehicle. The method comprises: acquiring original data collected during reverse travel of a vehicle and used for detecting a retaining wall, and processing the original data to obtain retaining wall final processing data; acquiring ground data during the reverse drive of the vehicle, and performing ground determination and ground removal processing on the ground data in sequence to obtain non-ground point cloud data; and obtaining distance information between the rear end of the vehicle and the retaining wall and integrity information of the retaining wall according to the retaining wall final processing data and the non-ground point cloud data. The present invention has the following advantages: the distance information between the vehicle and the retaining wall at the rear side is accurately detected, and at the same time the integrity information of the retaining wall at the rear side is perceived, thereby ensuring that the vehicle will not cross the region boundary while dumping a material to an unloading region; the distance between the vehicle and a small-scale ground obstacle on the rear side is accurately detected, thereby ensuring driving safety.

IPC Classes  ?

• G01S 17/931 - Lidar systems, specially adapted for specific applications for anti-collision purposes of land vehicles
• G01S 17/88 - Lidar systems, specially adapted for specific applications
• G01C 21/00 - Navigation; Navigational instruments not provided for in groups
• G05D 1/02 - Control of position or course in two dimensions

Abstract

Disclosed in the present invention are a method and system for controlling a speed drop under a sudden load change of a positive flow system, and an excavator in the technical field of hydraulic control. The method for controlling a speed drop under a sudden load change of a positive flow system comprises: collecting an outlet pressure value of a main pump unit; and obtaining a load change rate according to the outlet pressure value; when the load change rate reaches a set value, outputting a feedforward compensation current which matches the current load change rate, wherein the feedforward compensation current is used for reducing the power of the main pump unit to a set power; and when a rotation speed change rate and a load-rate change rate of an engine meet a certain level in given speed drop severity levels, outputting a speed drop compensation current which matches the current rotation speed change rate and load-rate change rate, wherein the speed drop compensation current is used for increasing the power of the main pump unit to the set power. By means of the present invention, a speed drop value of an engine can be effectively reduced; the whole machine control comprises feedforward compensation and speed drop control, such that the stability of the rotation speed of the engine can be effectively improved; and an electric control constant rate is used and the rotation speed of the engine is stably controlled, such that the oil consumption of a system can be effectively reduced.

IPC Classes  ?

• E02F 9/22 - Hydraulic or pneumatic drives
• E02F 3/04 - Dredgers; Soil-shifting machines mechanically-driven

Abstract

This disclosure provides an engineering vehicle and an air conditioning system thereof beneficial to improve comfortability of drivers. The air conditioning system includes: an air conditioner body, including a shell with first and second air outlet; a first air supply pipeline, a first end of the first air supply pipeline being connected to the first air outlet; first air support port(s), arranged at an inner front end of a cab of the engineering vehicle and connected to a second end of the first air supply pipeline; a second air supply pipeline, a first end of the second air supply pipeline being connected to the second air outlet; second air supply port(s), arranged at an inner rear end of the cab and connected to a second end of the second air supply pipeline; and a flow distribution device including a flow dividing portion located in the shell.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• E02F 9/08 - Superstructures; Supports for superstructures

Abstract

A device control system construction method and apparatus. A control system comprises an application layer, a mapping layer, and a basic layer. The application layer is used for executing user control logic for a device; the basic layer is used for executing a device control instruction; and the mapping layer is used for forwarding the device control instruction, sent by the application layer on the basis of the user control logic, to the base layer. The method comprises: selecting several first modules from a plurality of preconstructed application control modules, and adding the first modules to the application layer; determining the basic layer corresponding to the several first modules; and setting an interface between the application layer and the mapping layer to generate the mapping layer. The method and apparatus not only improve the transportability, testability and maintainability of construction of an engineering machinery control system, but also improve the reusability of the construction of the control system.

IPC Classes  ?

• G06F 8/30 - Creation or generation of source code
• G06F 8/76 - Adapting program code to run in a different environment; Porting

Abstract

A rotary frame includes a first connecting member of the rotary frame has an arc-shaped concave part. Each second connecting member is non-coplanar with the first connecting member and has a mounting hole. A first reinforcing member is connected between a first end of the first connecting member and one of the second connecting members; and another first reinforcing member is connected between a second end of the first connecting member and the other second connecting member. A second reinforcing member is connected between a middle part of a circumferential edge of the first connecting member and one of the second connecting members; and another second reinforcing member is connected between the middle part of the circumferential edge of the first connecting member and the other second connecting member. Middle regions of the first and second reinforcing members joined to the same second connecting member are separate from each other.

IPC Classes  ?

• E02F 3/76 - Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling devices
• E02F 3/84 - Drives or control devices therefor

Abstract

The present invention discloses a molten salt ultrasonic cleaning machine. The molten salt ultrasonic cleaning machine includes a tank body, a molten salt heating system, an ultrasonic application system and a stirring system, wherein the tank body is configured to accommodate molten salt and a to-be-cleaned workpiece; the tank body includes a bottom wall, and a side wall arranged circumferentially in a surrounding way; the molten salt heating system is configured to heat the molten salt in the tank body; the ultrasonic application system is configured to apply ultrasonic impact to the to-be-cleaned workpiece in the tank body; and the stirring system includes a stirring rod which is rotatably arranged in the tank body. When the molten salt ultrasonic cleaning machine provided by the present invention cleans a workpiece, the stirring rod rotates to improve the flowability of the molten salt. In combination with the ultrasonic impact, rapid removal of pollutants in the complex space of the workpiece and pollutants on the bottom layer of the surface is accelerated, so that the cleaning efficiency is improved. Moreover, the improvement of the molten salt flowability can promote complete reaction between the unreacted paint and residues which float on the surface of the liquid level, and the molten salt, so that the quantity of generated waste gas is reduced.

IPC Classes  ?

• B08B 3/10 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
• B08B 3/12 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations

Abstract

A water hose reel system for use in a drainage emergency vehicle comprises a water hose reel assembly (1), a hydraulic motor (2), a solenoid valve (3), a hydraulic pump (4), a controller (5), and a pressure sensor (6). The hydraulic pump (4) is used to provide power to the hydraulic motor (2), the pressure sensor (6) is used to measure an oil supply pressure of the hydraulic pump (4) and feed back the oil supply pressure to the controller (5), and the controller (5) determines a working state of the water hose reel assembly according to a pressure value, so as to adjust an open or closed state and a flow rate of the solenoid valve (3), and thereby adjust a rotation speed of the hydraulic motor (2). The invention also comprises a method for controlling a water hose reel system for use in a drainage emergency vehicle, and a drainage emergency vehicle. The apparatus and method can improve the operation efficiency and reduce the labor intensity of personnel.

IPC Classes  ?

• G01L 11/00 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or
• B65H 54/40 - Arrangements for rotating packages

Abstract

A map editing apparatus and method suitable for an unmanned transportation system in an opencast mine, and an update system, which belong to the technical field of unmanned driving in opencast mines. The method comprises: performing fine-grain division on a working face area by means of a polygon clipping controller, or integrating and adjusting working face areas by means of a polygon merging controller; splitting, by means of a lane splitting controller, a lane to be edited; by means of a lane splicing controller, selecting two lanes to be edited for merging; splicing the two said lanes by means of the lane splicing controller; and extending one of said lanes by means of a lane extension controller. Compared with a traditional vector map, the method is suitable for a specific scene in an opencast mine. Semantic information is integrated for a relatively structured driving area and an unstructured working face area. An abundant editing method is provided, thereby facilitating the creation, maintenance and updating of a complex environment map of the opencast mine by a user.

IPC Classes  ?

• G01C 21/00 - Navigation; Navigational instruments not provided for in groups

Abstract

Disclosed are an intelligent control system for a vertical lifting drainage vehicle, and a method. The control system comprises a transmitter, a wireless remote control receiver, a chassis controller and a working device controller; the transmitter is used to remotely configure the working mode of the working device controller by means of the wireless remote control receiver and to issue a working instruction by means of the wireless remote control receiver in different working modes; the wireless remote control receiver is used to control the chassis controller and the working device controller to perform corresponding actions according to the working instruction issued by the transmitter; the chassis controller is used to provide power to a drainage vehicle; and the working device controller is used to, according to the working instruction, adjust the position pose of the drainage vehicle and control the drainage vehicle to performing draining. In the present invention, multi-mode control is designed, the arrangement of operation buttons is reduced, manual operation adjustment is reduced and control accuracy is improved, so that a vertical lifting drainage vehicle can quickly enter a working state, thus improving the intelligent level of the vertical lifting drainage vehicle.

IPC Classes  ?

• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors

Abstract

A submersible pump and a drainage emergency vehicle. The submersible pump comprises a pump body (100) and a cutting assembly (2). The pump body (100) comprises a water intake section (1), an intermediate section (51) and a water output section (6), which are successively arranged in an axial direction. The cutting assembly (2) comprises a fixed cutter disc (21) and a movable cutter (22), wherein the fixed cutter disc (21) is fixedly connected to the water intake section (1) and comprises at least two fixed cutter blades (212) spaced apart from each other in a circumferential direction; and the movable cutter (22) is arranged on an inner side, in an axial direction, of the fixed cutter disc (21) and is rotatably arranged with respect to the pump body (100). In a flow area of the whole pump body, the number of cutters is increased, thereby improving the cutting efficiency, and effectively preventing a band-shaped object from being tangled with an impeller.

IPC Classes  ?

• F04D 13/04 - Units comprising pumps and their driving means the pump being fluid-driven
• F04D 29/70 - Suction grids; Strainers; Dust separation; Cleaning
• F04D 29/08 - Sealings
• F04D 29/44 - Fluid-guiding means, e.g. diffusers
• F04D 29/046 - Bearings
• F04D 29/20 - Mounting rotors on shafts
• B26D 1/28 - Cutting through work characterised by the nature or movement of the cutting member; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut and rotating continuously in one direction during cutting
• B62D 63/04 - Component parts or accessories

Abstract

The present disclosure relates to the field of bolt pretightening force prediction. Provided are a bolt pretightening force attenuation prediction device and method, which are used to predict attenuation characteristics of a bolted connection. The bolt pretightening force attenuation prediction device comprises a pretightening force coefficient measurement device, and the pretightening force coefficient measurement device comprises a holding assembly, a pretightening force measurement assembly, a tightening assembly and a duration measurement assembly. The holding assembly is configured to secure a bolt to be tested; the pretightening force measurement assembly is configured to measure a pretightening force to which the bolt is subjected; the tightening assembly is configured to apply the pretightening force to the tested bolt; and the duration measurement assembly is configured to measure the duration of each instance of sampling during bolt tightening. By means of the technical solution, the prediction of variation of a bolt pretightening force with a vibration period under different operation conditions and the prediction of the probability distribution of the bolt pretightening force are realized, a confidence interval in the the sense of probability is given, and the dispersion of a bolt pretightening force attenuation process can be more accurately reflected. The technical solution has very important significance for the anti-loosening design and maintenance period of a bolted connection.

IPC Classes  ?

• G01L 5/24 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed

Abstract

Provided in the present disclosure are an emergency drainage vehicle and an operating apparatus thereof. The operating apparatus comprises: a luffing mechanism, comprising a base, a rotating arm and a luffing drive apparatus, a bottom end of the base being used to connect to the body of the emergency drainage vehicle, a first end of the rotating arm in a length direction being hinged to the base around a horizontal axis, and the luffing drive apparatus having a drive connection to the rotating arm, and being used to drive the rotating arm to rotate relative to the base; a transfer mechanism mounted on the rotating arm and comprising a first support and a first transfer drive apparatus, the first transfer drive apparatus having a drive connection to the first support and being used to drive the first bracket and the rotating arm to approach each other or move away from each other along a first transfer direction, and the first transfer direction being perpendicular to the length direction of the rotating arm and the horizontal axis; and a drainage mechanism used to execute a drainage operation, the drainage mechanism being movably disposed on the first support along a length direction of the first support. The emergency drainage vehicle and the operating apparatus thereof of the present disclosure can expand the operation range of the emergency drainage vehicle and increase emergency rescue efficiency.

IPC Classes  ?

• B60P 3/00 - Vehicles adapted to transport, to carry or to comprise special loads or objects
• E03F 7/10 - Wheeled apparatus for emptying sewers or cesspools
• E01H 1/10 - Hydraulically loosening or dislodging undesirable matter; Raking or scraping apparatus

Abstract

Provided in the present invention are an engaging structure for use in plate welding, and a welding device and method without welding spot alignment. The device comprises a connection bracket, a welding gun and a cutting mechanism, wherein the welding gun is fixed on the connection bracket, and the cutting mechanism is fixedly connected to the connection bracket by means of a posture adjustment mechanism. The plates to be welded are each provided with the engaging structure, and after two plates are assembled, multi-dimensional constraints can be achieved by means of the engaging structure. Before welding, according to the actual constraint dimension requirement, the edges of the plates are cut, assembled and engaged according to the form of the engaging structure; and after the position of the welding gun is adjusted, the cutting mechanism and the welding gun are driven by a welding robot or a special welding machine to move in the direction of a welding seam. The cutting mechanism is responsible for removing the engaging structure, and then the welding gun performs normal welding. According to the present invention, the working procedure of welding spot alignment and then grinding is directly omitted, thereby improving the welding efficiency and the welding seam quality and saving on costs for labor and material resources.

IPC Classes  ?

• B23K 28/02 - Combined welding or cutting procedures or apparatus
• B23K 37/00 - Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the other main groups of this subclass
• B23K 26/38 - Removing material by boring or cutting

Abstract

The present disclosure relates to an arc ion coating device and a coating method. The arc ion coating device includes: a vacuum chamber with a vacuum environment inside; an arc generation component disposed in the vacuum chamber and comprising a cathode target, an anode and an arc starter, the cathode target being columnar and configured to release plasmas, and the arc starter being disposed between the cathode target and the anode and configured to generate charged particles to guide a generation of an arc between a side of the cathode target and the anode to coat a workpiece; a support frame disposed in the vacuum chamber, the support frame being disposed at a side of the anode away from the cathode target and configured for a placement of the workpiece; and a power supply component comprising an arc power supply and a first accumulator, the arc power supply having a first output end and a second output end, the first output end being configured to output a pulsed voltage and connected to the arc starter, the second output end being configured to output an adjustable DC voltage and charge the first accumulator, and a negative pole and a positive pole of the first accumulator being connected to the cathode target and the anode, respectively.

IPC Classes  ?

• H05H 1/48 - Generating plasma using an arc
• H05H 1/54 - Plasma accelerators
• C23C 14/32 - Vacuum evaporation by evaporation and subsequent ionisation of the vapours
• C23C 14/54 - Controlling or regulating the coating process

Abstract

A method and system for controlling machine tool descent stability, and a tractor. An outlet of a main pump (2) is connected to inlets of a main relief valve (3), fixed-difference relief valve (5), and machine tool control valve (6) respectively; an oil outlet of the machine tool control valve (6) is connected to a spring cavity of the fixed-difference relief valve (5) via a steady-state throttle valve (4), and moreover, the oil outlet of the machine tool control valve (6) is connected to an inlet of a switch valve (8); an oil outlet of the switch valve (8) is connected to a rodless cavity of a suspension oil cylinder (9) in a suspension mechanism; the rodless cavity of the suspension oil cylinder (9) is also connected to an inlet of a lowering valve (7); a rod cavity of the suspension oil cylinder (9) is connected to an inlet of a secondary relief valve (10); a position sensor (12), a force sensor (11), a lowering knob (16), a target position setting knob (15), and a lowering speed setting knob (14) are electrically connected to an input end of a controller (13); an output end of the controller (13) is electrically connected to a solenoid valve of the machine tool control valve (6), a solenoid valve of the lowering valve (7), and a solenoid valve of the switch valve (8) respectively.

IPC Classes  ?

• F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
• F15B 15/28 - Means for indicating the position, e.g. end of stroke
• F15B 21/08 - Servomotor systems incorporating electrically- operated control means
• A01B 63/02 - Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors

Abstract

An engineering machinery maintainability evaluation method and apparatus, and a computer apparatus and a storage medium. The engineering machinery maintainability evaluation method comprises: for each maintenance component in the whole engineering machinery or an engineering machinery system, determining a maintainability evaluation value of the maintenance component according to a maintenance input requirement, a maintenance process and a maintenance result of the maintenance component (1); and determining a maintainability evaluation value of the whole engineering machinery or the engineering machinery system according to the maintainability evaluation value of each maintenance component (2). By means of the method, items of a maintenance requirement evaluation score and a maintenance result effect evaluation score are included, such that compared with the related art wherein only a maintenance process is evaluated, the method is more comprehensive and rational.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling

Abstract

The present disclosure relates to a workpiece cleaning device and a cleaning method. The workpiece cleaning device comprises: a frame (1); and a plurality of cleaning tanks disposed on the frame (1) side by side, comprising a molten salt cleaning tank (2) for cleaning a workpiece with molten salt, a first rinsing tank (5) for rinsing the workpiece cleaned with the molten salt, a de-rusting cleaning tank (6) for cleaning the workpiece rinsed in the first rinsing tank (5) with a de-rusting agent, a second rinsing tank (7) for rinsing the workpiece cleaned with the de-rusting agent, and an anti-rust cleaning tank (8) for cleaning the workpiece rinsed in the second rinsing tank (7) with anti-rust liquid, which are sequentially disposed from upstream to downstream in terms of procedure.

IPC Classes  ?

• C23G 1/28 - Cleaning or pickling metallic material with solutions or molten salts with molten salts
• B08B 3/08 - Cleaning involving contact with liquid the liquid having chemical or dissolving effect
• B08B 3/12 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
• B08B 3/14 - Removing waste, e.g. labels, from cleaning liquid
• C23G 1/02 - Cleaning or pickling metallic material with solutions or molten salts with acid solutions
• C23G 1/24 - Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
• C23G 1/36 - Regeneration of waste pickling liquors

Abstract

The present disclosure relates to a hydraulic control system, a tractor, and a hydraulic control method. The hydraulic control system comprises a hydraulic pump, a hydraulic cylinder, an execution element, a first electric control valve, and a control apparatus. The hydraulic cylinder is in fluid communication with the hydraulic pump. The execution element is connected to a cylinder rod of the hydraulic cylinder. The first electric control valve is arranged on a connecting pipeline between the hydraulic pump and the hydraulic cylinder. The first electric control valve is configured to adjust the amount of flow of the connecting pipeline. The control apparatus is in signal connection with the first electric control valve. The control apparatus is configured to control, during the rising process of the execution element, the maximum input current of the first electric control valve to be a first current value, the first current value being the minimum current required for the first electric control valve when the amount of output flow of the hydraulic pump reaches the maximum value.

IPC Classes  ?

• F15B 11/048 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed depending on the position of the working member with deceleration control
• A01B 3/04 - Animal-drawn ploughs
• G05D 7/06 - Control of flow characterised by the use of electric means

Abstract

A backhoe loader capable of achieving efficient digging. The backhoe loader comprises: a vehicle body (1) comprising a first vehicle body (11) and a second vehicle body (12) connected in sequence; a loading device (2) arranged on the first vehicle body (11); a manipulation platform (3) arranged on the second vehicle body (12), the manipulation platform (3) being configured to be rotatable 360° relative to the second vehicle body (12); a cab (4) arranged on a first side of the manipulation platform (3); and a digging device (5) arranged on a second side of the manipulation platform (3) opposite to the first side, the digging device (5) being configured to be rotatable 180° relative to the cab (4). The backhoe loader can achieve 360° digging, two-way driving, and other functions. When the digging device (5) is working, the backhoe loader can be directly moved after support legs are retracted, without changing the position of a seat back and forth, thereby improving the digging efficiency. The backhoe loader provides an operator with a wide visual field and a good sense of control, has a compact structure, and the vehicle bodies have good stability.

IPC Classes  ?

• E02F 3/96 - Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate use of different digging elements

Abstract

A modular excavator, comprising a plurality of detachably connected assembly modules, the plurality of assembly modules comprising: a frame turntable base module (M1); track beam assembly modules (M2, M3) configured to be connected to the frame turntable base module (M1); track modules (M4, M5) configured to be connected to the track beam assembly modules (M2, M3); a rotation drive module (M6) configured to be connected to the frame turntable base module (M1); a power assembly module (M7) configured to be connected to the frame turntable base module (M1); counterweight modules (M8, M9) configured to be connected to the power assembly module (M7); a cab module (M10) configured to be connected to the frame turntable base module (M1); a fuel tank module (M11) configured to be connected to the frame turntable base module (M1); a boom assembly module (M12) configured to be connected to the frame turntable base module (M1); a stick assembly module (M13) configured to be connected to the boom assembly module (M12); and a work machine tool module (M14) configured to be connected to the stick assembly module (M13). The present modular excavator facilitates a quick arrival to a work site, thereby ensuring work progress.

IPC Classes  ?

• E02F 9/08 - Superstructures; Supports for superstructures
• E02F 9/16 - Cabins, platforms, or the like for the driver
• E02F 9/18 - Counterweights
• E02F 3/04 - Dredgers; Soil-shifting machines mechanically-driven
• E02F 3/32 - Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes

Abstract

The present invention relates to the field of polymer materials, and relates to a high-strength self-lubricating polyurethane piston sealing body, and a preparation method therefor. In particular, the present invention relates to a composition that can be used to prepare a piston sealing body, a piston sealing body prepared from the composition, and a method for preparing the piston sealing body. The piston sealing body of the present invention can be used as a concrete piston sealing body for a concrete pumping device.

IPC Classes  ?

• C08L 75/08 - Polyurethanes from polyethers
• C08L 23/06 - Polyethene
• C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
• C08K 3/22 - Oxides; Hydroxides of metals
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• E04G 21/02 - Conveying or working-up concrete or similar masses able to be heaped or cast
• F04B 53/14 - Pistons, piston-rods or piston-rod connections

Abstract

A wear plate for a concrete pump truck, a preparation method therefor, and the concrete pump truck. The wear plate for a concrete pump truck comprises: a base body (3) comprising two through holes (31), a nose bridge portion (32) and two arc-shaped portions (33), wherein the nose bridge portion (32) is arranged between the two through holes (31), and the two arc-shaped portions (33) and the nose bridge portion (32) form the two through holes (31); a first wear-resistant body (1) comprising first portions (11) and a second portion (12), wherein one first portion (11) is provided in each through hole (31) of the two through holes (31), the first portions (11) are connected to the nose bridge portion (32), and the second portion (12) is arranged on a surface of the nose bridge portion (32) and located between the two through holes (31); and second wear-resistant bodies (2), wherein one second wear-resistant body (2) is provided in each through hole (31) of the two through holes (31), the second wear-resistant bodies (2) are connected to the arc-shaped portions (33), the wear resistance of the first wear-resistant body (1) is greater than that of the second wear-resistant bodies (2), and the wear resistance of the second wear-resistant bodies (2) is greater than that of the base body (3). The wear-resistant bodies (1, 2) are arranged on a surface of the nose bridge portion (32) and on inner walls of the through holes (31) to improve the wear resistance. In addition, a preset amount of tungsten is added into the wear-resistant body (1) of the nose bridge portion (32) to improve the wear resistance and impact resistance of the wear-resistant body (1).

IPC Classes  ?

• F04B 53/00 - Component parts, details or accessories not provided for in, or of interest apart from, groups or
• 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
• B22D 19/16 - Casting in, on, or around, objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
• B22D 19/08 - Casting in, on, or around, objects which form part of the product for building up linings or coverings, e.g. of anti-frictional metal
• C22C 29/02 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on carbides or carbonitrides
• C22C 29/12 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on oxides
• C22C 38/00 - Ferrous alloys, e.g. steel alloys

Abstract

222 solid lubrication layer of the bushing inner ring (2), in combination with the oil storage function of the powder metallurgy, allows for the liquid-solid synergistic lubrication between a friction pair, enhancing the lubrication function.

IPC Classes  ?

• B22F 7/06 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools
• B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
• B22F 1/145 - Chemical treatment, e.g. passivation or decarburisation
• B22F 9/04 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

A heavy-duty, high-power and large-torque chassis dynamometer in a multi-environment system. The chassis dynamometer comprises a dynamometric platform (1) arranged on the ground, and a stand (2) located below the dynamometric platform (1), wherein a fixed base (3) and a sliding base (4) are sequentially arranged on an inner side of the stand (2) in the length direction of the dynamometric platform (1); a pair of first rotating hub assemblies (6) are installed above the fixed base (3) by means of several supports (8); the sliding base (4) is provided with a sliding platform (5) thereon; a pair of second rotating hub assemblies (7) are installed on the sliding platform (5) by means of the several supports (8); tension sensor assemblies (13) are also connected to the outer circumference of the first rotating hub assembly (6) and the outer circumference of the second rotating hub assembly (7); and the tension sensor assemblies (13) are fixedly disposed on the supports (8). The dynamometer is characterized by having a stable structure and multiple testing functions, being heavy duty, and having a high power and a large torque; and the center distance between the two groups of rotating hub assemblies (6, 7) can be adjusted by means of fixed and sliding arrangement, thereby adapting to chassis dynamometric tests of different heavy-duty trucks.

IPC Classes  ?

• G01L 3/24 - Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
• G01L 5/00 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
• G01M 17/007 - Wheeled or endless-tracked vehicles

Abstract

A motor direct-drive roller of a heavy-duty chassis dynamometer, comprising a roller body (1); a mounting end face (2) is provided on the inner circumference of the roller body (1); a transmission shaft (3) coaxial with the roller body (1) is sleeved on the mounting end face (2); a drive assembly (4) is sleeved on the transmission shaft (3); a bearing assembly (5) is provided on each of two axial sides of the drive assembly (4); a plurality of axial mounting plates (6) are provided on the outer circumference of the drive assembly (4); a tension force sensor assembly (7) is connected to the axial mounting plate (6) located outside the roller body (1), and the tension force sensor assembly (7) is mounted on a support frame (8); an end portion flange plate (9) is further sleeved on the end portion of the transmission shaft (3) far away from the mounting end face (2); and several brake assemblies (10) are arranged on the end portion flange plate (9), and the brake assemblies (10) are also mounted on the support frame (8). The present roller has a compact structure, and the position arrangements of components are rational, thereby fully utilizing the space inside the roller body (1), and satisfying the test requirements for direct drive and heavy duty.

IPC Classes  ?

• G01L 3/24 - Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
• G01L 5/00 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
• G01L 5/13 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles
• F16D 65/095 - Pivots or supporting members therefor
• F16D 55/22 - Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads

Abstract

The present disclosure provides a method of designing and manufacturing a hydraulic valve block based on selective laser melting. The method includes providing a machined hydraulic valve block, determining whether the machined hydraulic valve block needs weight reduction, if the machined hydraulic valve block needs weight reduction, taking reduction of the pressure loss of the flow channel as an optimization goal and optimizing the flow channel of the machined hydraulic valve block to obtain an optimized flow channel structure model, taking reduction of the weight of the hydraulic valve block as an optimization goal and optimizing solid portions of the optimized flow channel structure model by using a topology optimization method to obtain a three-dimensional solid structure model of a hydraulic valve block and printing the three-dimensional solid structure model by using selective laser melting to obtain the hydraulic valve block.

IPC Classes  ?

• B33Y 10/00 - Processes of additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing
• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• B22F 10/85 - Data acquisition or data processing for controlling or regulating additive manufacturing processes
• B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
• G06F 30/10 - Geometric CAD
• G06F 111/10 - Numerical modelling
• B23K 26/342 - Build-up welding
• G06F 119/18 - Manufacturability analysis or optimisation for manufacturability

Abstract

The present disclosure provides an engineering vehicle and an air-conditioning system thereof. The air-conditioning system comprises: an air conditioner body, which comprises a housing provided with a first air outlet and a second air outlet; a first air supply pipeline, wherein a first end of the first air supply pipeline is connected to the first air outlet; one or more first air supply port structures, which are arranged at the front end of the interior of a cab of an engineering vehicle and are connected to a second end of the first air supply pipeline; a second air supply pipeline, wherein a first end of the second air supply pipeline is connected to the second air outlet; one or more second air supply port structures, which are arranged at the rear end of the interior of the cab and are connected to a second end of the second air supply pipeline; and a flow distribution device, which comprises a flow distribution portion located in the housing, wherein the flow distribution portion is movably arranged relative to at least one of the first air outlet and the second air outlet so as to change the outlet air volume ratio of the air conditioner body, and the outlet air volume ratio is the ratio of the volume of air flowing out of the housing from the first air outlet to the volume of air flowing out of the housing from the second air outlet. The engineering vehicle and the air-conditioning system thereof are conducive to improving the comfort of a driver.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices