A construction machine is provided which includes a plurality of hydraulic actuators, a hydraulic pump that discharges pressurized fluid for driving the hydraulic actuators, an engine that drives the hydraulic pump, a plurality of operation lever devices that operate the corresponding hydraulic actuators, a key switch that starts the engine, a speed sensor that senses a rotational speed of the engine, a plurality of operation sensors that sense operation of the corresponding operation lever devices, and a controller that drives, in response to operation of the operation lever devices, the corresponding hydraulic actuators. The controller decides, on the basis of signals from the key switch, the speed sensor, and the plurality of operation sensors, whether operation of the operation lever device is first time operation after start of the engine, and limits, in a case where the operation of the operation lever device is first time operation after start of the engine, the action speed of the hydraulic actuator.
F15B 21/00 - Common features of fluid actuator systemsFluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
01 - Chemical and biological materials for industrial, scientific and agricultural use
02 - Paints, varnishes, lacquers
04 - Industrial oils and greases; lubricants; fuels
Goods & Services
Industrial chemicals; chemical preparations for scientific
purposes, other than for medical or veterinary use; nitrogen
compounds; chemical additives for gasoline; chemical
additives for fuel; chemical preparations for decarbonising
engines; chemical additives for use with internal combustion
engine fuels; fuel-saving preparations; transmission fluids;
power steering fluid; brake fluid; fluids for hydraulic
circuits; anti-freeze for vehicle radiators; anti-freeze
chemicals; chemical additives for lubricants; hydraulic
fluids; hydraulic oils. Coating compositions in the nature of paint; anti-rust
preparations; anti-rust greases. Industrial oils; lubricating oils; lubricants for industrial
purposes; industrial greases; grease for machines;
lubricating grease; engine oils; gear oils; liquid fuels;
gases for use as fuel; biodiesel fuel; diesel fuel; hydrogen
fuel; non-chemical additives for engine oils; non-chemical
additives for fuels, lubricants and greases.
3.
ABNORMALITY DIAGNOSIS DEVICE FOR PLANETARY GEAR SPEED REDUCER AND CONSTRUCTION MACHINE
An abnormality diagnosis device for a planetary gear speed reducer includes a second vibration sensor attached to a housing of a hydraulic motor having an output shaft coupled to the planetary gear speed reducer. A controller computes a peak frequency Fm of the hydraulic motor and a speed of rotation of the hydraulic motor on the basis of second vibration data acquired through the second vibration sensor, compute, on the basis of the computed speed of rotation, the number of a plurality of gears included in the planetary gear speed reducer, and the number of teeth of each of the gears, characteristic frequencies fd of the plurality of gears, and determines presence or absence of abnormality in the plurality of gears on the basis of the peak frequency Fm of the hydraulic motor and amplitudes at the characteristic frequencies fd of first vibration data acquired through a first vibration sensor attached to the planetary gear speed reducer.
A first variable relief valve (51A) allows the flow of a hydraulic oil from a first main line (37A) to a second main line (37B) to be in a blocking state in a case the pressure of the first main line (37A) is a first pressure or less and to be in a communicating state in a case the pressure of the first main line (37A) exceeds the first pressure. A second variable relief valve (51B) allows the flow of a hydraulic oil from the second main line (37B) to the first main line (37A) to be in a blocking state in a case the pressure of the second main line (37B) is a second pressure or less and to be in a communicating state in a case the pressure of the second main line (37B) exceeds the second pressure. A “power transmission capability from a first hydraulic pump motor (36) to a second hydraulic pump motor (38)” and a “power transmission capability from the second hydraulic pump motor (38) to the first hydraulic pump motor (36)” are allowed to be different from each other by setting the first pressure of the first variable relief valve (51A) to be higher than the second pressure of the second variable relief valve (51B).
The present invention provides a hydraulic circuit system and a pump device that use a tandem pump, in which two hydraulic pumps capable of independently controlling the flow rates of multiple discharge ports are disposed, and a plurality of switching valves, wherein operability is improved, and mounting characteristics are enhanced by miniaturizing the pump device and reducing the number of hydraulic hoses. To this end, first and second hydraulic pumps 11, 12, which incorporate four pump elements 11a-11d, 12a-12d capable of independently controlling the flow rates of pressurized oil discharged from discharge ports 45a-45d, 46a-46d and are arranged in tandem along the axial direction of a shaft 14 so as to form a tandem pump 30, are such that the discharge ports 45a-45d, 46a-46d are opened in a block surface 13S of a port block 13, which is a shared component, and a manifold block 40, in which switching valves 41a-41d, 42a-42d are mounted and service ports 43, 44 are formed, is coupled to the block surface 13S.
A cover device 40 includes: a cover 50 that comes into contact with an outer surface 21a of a boom 21 (front implement 20) to close an access hole 30; and a bracket 60 that is positioned inside the boom 21, is attached to the boom 21 via a screw seat 90, and is detachably fastened to the cover. The attachment position of the bracket 60 and the boom 21 is located farther than an outer peripheral edge 50a of the cover 50 with respect to the access hole 30, and the attachment position of the bracket 60 and the cover 50 is located closer to a center 30b than to an inner peripheral edge 30a of the access hole 30.
A manifold (33) of a closed-circuit control valve device (32) disposed rearward of a left revolving hydraulic motor (8) includes a valve attachment area (33E) provided at a central portion of the manifold (33) in the right-and-left direction and including a control valve (34) mounted therein and a pipe attachment area (33F) provided outward of the valve attachment area (33E) in the right-and-left direction and including a closed-circuit actuator side pipe (47) mounted therein. A manifold (42) of an open-circuit control valve device (41) disposed rearward of a right revolving hydraulic motor (9) includes a valve attachment area (42E) provided at a central portion of the manifold (42) in the right-and-left direction and mounted a control valve (43) and a pipe attachment area (42F) provided outward of the valve attachment area (42E) in the right-and-left direction and mounted an open-circuit actuator side pipe (48).
E02F 3/32 - DredgersSoil-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 3/42 - Drives for dippers, buckets, dipper-arms or bucket-arms
This electric system for a work machine is mounted on a work machine, the electric system comprising: an electric motor that generates driving force for operating a work device of the work machine; a chargeable/dischargeable storage battery; an inverter that converts first DC power supplied from the storage battery to first AC power; and a connector box in which a prescribed circuit module can be installed. The connector box is configured to be connectable to each of a system power supply, the inverter, and the electric motor. The inverter drives the electric motor using at least one of the system power supply and the first AC power in accordance with the prescribed circuit module mounted in the connector box.
E02F 9/00 - Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups
B60L 9/18 - Electric propulsion with power supply external to the vehicle using AC induction motors fed from DC supply lines
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
B60L 53/20 - Methods of charging batteries, specially adapted for electric vehiclesCharging stations or on-board charging equipment thereforExchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
B60L 58/10 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
B60R 16/03 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for supply of electrical power to vehicle subsystems
The work vehicle includes a frame, a lift arm having a base end section attached to the frame, a work tool attached to the distal end section of the lift arm, a base-end link device attached to the frame and the base end section side of the lift arm, a distal-end link device attached to the work tool and the distal end side of the lift arm, and a work tool cylinder extending from the base-end link device toward the distal-end link device and driving the work tool via the distal-end link device. An angle detection device attached to the lift arm and detecting the angle formed by the lift arm and the distal-end link device is provided. The angle detection device is disposed between the portion of the lift arm to which the distal-end link device is connected and the base end section of the lift arm.
E02F 3/34 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with bucket-arms directly pivoted on the frames of tractors or self-propelled machines
E02F 3/42 - Drives for dippers, buckets, dipper-arms or bucket-arms
This work machine is provided with: a work device; a first electric motor for driving a first hydraulic pump that supplies hydraulic oil to a high-pressure line; a second electric motor for driving a second hydraulic pump that supplies hydraulic oil to a low-pressure line; a hydraulic cylinder having four chambers, and being driven by the hydraulic oil discharged from the first hydraulic pump and the second hydraulic pump, to drive the work device; high-pressure control valves for controlling communication and interruption between the high-pressure line and the chambers; low-pressure control valves for controlling communication and interruption between the low-pressure line and the chambers; pressure sensors for detecting the pressures in the chambers; an operation amount sensor for detecting an operation amount of an operation device for operating the hydraulic cylinder; and a control device for controlling the high-pressure control valves and the low-pressure control valves on the basis of the detection results of the pressure sensors and the operation amount sensor, and controlling the rotation speed of the first electric motor on the basis of the detection result of the operation amount sensor.
Provided is a wheel loader allowing a load to be sufficiently mounted into a bucket regardless of the size and properties of a work object and an operation performed before the start of excavation. In a wheel loader 1 with an excavation support controller 5 for autonomously controlling a working device 2, in a case where a bucket 23 is tilted forward more than that in a predetermined posture, the excavation support controller 5 keeps outputting a command signal relating to a lifting operation to a lift arm solenoid control valve 481 and also outputs a command signal relating to a tilt operation to a bucket solenoid control valve 482 until the bucket 23 is in the predetermined posture, and in a case where the bucket 23 reaches the predetermined posture, outputs a command signal relating to a full tilt operation to the bucket solenoid control valve 482.
An object of the present invention is to provide an electric power generation system that can stably control, with one electric power converter, output electric power of a main winding and an auxiliary winding of a dual-winding induction electric power generator. For this purpose, in an electric power generation system including an electric power generator having a stator including a main winding and an auxiliary winding, a rectifier connected to the main winding, an electric power converter that is connected to the auxiliary winding and controls voltages of the main winding and the auxiliary winding, and a controller that outputs a control signal according to a voltage command value of the auxiliary winding to the electric power converter, the controller calculates a voltage change amount of the auxiliary winding generated by interference of a magnetic flux of the main winding with the auxiliary winding, on the basis of a current and the voltage of the main winding, and adds the voltage change amount to the voltage command value of the auxiliary winding.
H02P 21/09 - Field phase angle calculation based on rotor voltage equation by adding slip frequency and speed proportional frequency
B60L 15/00 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train
H02P 21/22 - Current control, e.g. using a current control loop
H02P 101/45 - Special adaptation of control arrangements for generators for motor vehicles, e.g. car alternators
H02P 103/10 - Controlling arrangements characterised by the type of generator of the asynchronous type
To provide a work vehicle in which a rearward detection device can be mounted on a rear end of a vehicle body without impairing operability of a towing pin. The work vehicle includes: a vehicle body; a counterweight that defines a rear end of the vehicle body; a towing pin that is held in a towing pin holding hole formed in the counterweight in a state where the towing pin is removable upwardly, the towing pin being engageable with a towing jig for towing another vehicle; and a rearward detection device that detects an object existing behind the vehicle body. The rearward detection device includes: a bracket that is supported by a counterweight above the towing pin that is held in a towing pin holding hole; a support plate that is supported by the bracket; and an object detection device that is supported by the support plate. The support plate is configured to be retractable in a manipulation direction of the towing pin when the towing pin is manipulated.
To keep tracking performance of a hauling vehicle to a target trajectory while suppressing a decrease in vehicle speed, the travel system 200 for a hauling vehicle 20 includes: a position sensor 273 that measures a vehicle position of the hauling vehicle 20; a storage device 210 that stores a curvature of a target trajectory 11 for the hauling vehicle 20, which is calculated for each node 12 making up the target trajectory 11; and a control device 220 that controls travel of the hauling vehicle 20 based on the vehicle position and the curvature. The control device 220 includes: a target point setting section 230 configured to set a target point, which is a point through which the hauling vehicle 20 passes, on the target trajectory 11 ahead of the vehicle position; and a vehicle control section 250 configured to control the travel of the hauling vehicle 20 so that the hauling vehicle 20 travels from the vehicle position to the target point. When the curvature at a node 12 ahead of the vehicle position is less than a threshold value, the target point calculation section 230 sets the target point at a location farther from the vehicle position than when the curvature is equal to or greater than the threshold value.
Provided is a pump diagnostic device and construction machine capable of performing precise and accurate diagnosis. A diagnostic device 40 for a hydraulic pump 1 includes an action instruction section 42 that outputs an action instruction for causing a hydraulic actuator 29 of a hydraulic excavator 200 to perform a specific action, a measurement condition setting section 44 that sets a sampling condition in measurement of a pressure of the hydraulic pump 1 during the specific action, a calculation section 46 that acquires a measured value of the pressure sampled during the specific action under the set sampling condition, and calculates a pressure pulsation amplitude of the hydraulic pump 1, an anomaly determination section 47 that determines whether there is an anomaly in the hydraulic pump 1 based on the calculated pressure pulsation amplitude, and an output section 48 that outputs a determination result obtained by the anomaly determination section 47.
In a work machine, when on a travel plane S of crawler belts, a straight line passing through a predicted travel point P1 a given distance from the crawler belts and having a maximum climbing angle is assumed to be a first line L1, and a line connecting an installation position of a distance sensor and the predicted travel point P1 is assumed to be a second line L2. The distance sensor measures a distance to a ground surface on the second straight line L2. A controller calculates a height H1 of a predicted travel region T based on a result of the distance sensor and a detection result of a turning angle sensor, and determines whether a height difference H3 between a height H1 of the predicted travel region T and a height H2 of the travel plane S is equal to or greater than a threshold.
A work machine includes a flow control valve that controls the flow rate of a hydraulic operating fluid supplied from a hydraulic pump to a hydraulic cylinder, a solenoid valve that generates an operation pressure for operating the flow control valve, and a controller. The controller executes learning processing of changing in a stepwise manner the operation pressure generated by the solenoid valve, sensing the pressure of the hydraulic cylinder, and storing the operation pressure when the pressure of the hydraulic cylinder has become a reference value, as a learning result operation pressure. The controller calculates a differential pressure across the flow control valve and computes a target opening area of the flow control valve on the basis of the differential pressure across the flow control valve and a target flow rate of the hydraulic operating fluid that passes through the flow control valve. The controller computes a target value of the operation pressure generated by the solenoid valve, on the basis of an opening characteristic table, the target opening area, and the learning result operation pressure, and controls the solenoid valve on the basis of the target value of the operation pressure.
F15B 13/044 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
18.
Management Apparatus and Management System for Work Machine
A management apparatus and a management system for a work machine capable of increasing the accuracy in determining whether or not oil of a driving apparatus of the work machine is replaced with genuine oil are provided. A management server manages oil used in the driving apparatus of a hydraulic excavator. The management server includes an oil replacement history creation section that acquires a measurement value of a property of target oil from an oil sensor incorporated in the hydraulic excavator and is configured to create a replacement history of the target oil on the basis of a change of the property of the target oil, a worker access history creation section that acquires access information indicating that the hydraulic excavator is accessed by a worker, the worker access history creation section being configured to create a history of access to the hydraulic excavator by the worker on the basis of the access information, and an oil type determination section that is configured to determine an oil type of the target oil replaced in a replacement timing corresponding to the replacement history, on the basis of the replacement history of the target oil and the access history of the worker.
An attachment base (15) to which a counterweight (13) is attached is provided at a rear portion of an upper turning body (4), a boss hole (15a) is provided to penetrate through the attachment base (15), and a boss recessed portion (13a) is formed in a front surface of the counterweight (13). A boss member (18) is inserted into the boss recessed portion (13a) of the counterweight (13) via the boss hole (15a) in the attachment base from a front side, and a bolt (21) is caused to be screwed into the boss member (18) through the counterweight (13) from a rear side. An abutment surface (18c) of the boss member (18) is caused to abut a front surface of the attachment base (15) with a fastening force of the bolt (21) to thereby fasten the counterweight (13) to the attachment base (15) and cause the attachment base (15) to support a weight of the counterweight (13) via the boss member (18).
Operations of an upper swing structure and a front work device are controlled such that a swing operation of the upper swing structure starts after a work tool starts only a lifting operation. The lifting operation and the swing operation are performed until the work tool reaches a height position of a passing position and only the swing operation is performed after the work tool reaches the height position of the passing position. The swing operation of the upper swing structure starts to decelerate at a swing deceleration start position, and only the swing operation is performed until the work tool reaches a swing position of the passing position to pass through the passing position. Accordingly, it is possible to reduce the discomfort feeling of an operator while realizing interference prevention at the time of a loading operation and a stop during the loading operation.
A left console device (13) positioned on an entrance passage (9A)-side is provided with a support shaft (15) disposed on a seat base (11), and a rotational frame (17) rotatably supported by the support shaft (15). A gate lock lever (25) is provided with a base plate (25A) that is rotatably supported via a first shaft body (17D) on the rotational frame (17) and in which a second shaft body (25D) is disposed, and a lever member (25B) that is provided with a gripping part (25E) and is disposed to be integral with the base plate (25A). A guide plate (26) is rotatably attached to a seat base (11). A guide groove (27) disposed on the guide plate (26) restricts a movement of the second shaft body (25D) to suppress a change in a height position of the gripping pin (25E) of the lever member (25B) when the rotational frame (17) rotates centering on the support shaft (15) together with the gate lock lever (25).
In a case where a travel permission request regarding a queuing zone for a first unmanned vehicle stopped in a queuing zone is received, on the basis of a time length taken for the first unmanned vehicle arriving at a deceleration start position and a time length taken for a second unmanned vehicle positioned in a loading zone going out of the loading zone from reception of a loading completion notification, a travel start time difference after which the second unmanned vehicle goes out of the loading zone before the first unmanned vehicle arrives at a deceleration start position is calculated, a travel start time of the first unmanned vehicle is calculated on the basis of a reception time of the loading completion notification and the travel start time difference, and a travel permission regarding the queuing zone for the first unmanned vehicle is output after the travel start time has come. As a result, it is possible to shorten a time length required for replacement of unmanned vehicles at a loading position and enhance productivity.
G05D 1/69 - Coordinated control of the position or course of two or more vehicles
G06Q 10/08 - Logistics, e.g. warehousing, loading or distributionInventory or stock management
H04W 4/44 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
Provided is a work machine including a flow control valve serving as a flow control mechanism that controls a flow rate of pressurized fluid from a hydraulic pump to a hydraulic actuator via a first control valve. A controller of the work machine, when the pressurized fluid is supplied to the hydraulic actuator from only an accumulator, drives a second control valve such that a meter-in side of the hydraulic actuator and the accumulator are connected to each other, drives the first control valve such that a meter-out side of the hydraulic actuator and a tank are connected to each other, and drives the flow rate control mechanism such that a flow of the pressurized fluid from the hydraulic pump to the hydraulic actuator via the first control valve is interrupted.
Provided is a control device for a wheel loader that is capable of improving the productivity of excavation work by reducing the work time required for the excavation work. A control device 120 is a control device for a wheel loader 1 that excavates a target by moving a vehicle body 2 forward with rotation of wheels 5f, 5r to plunge a bucket 3 into the target. The control device 120 moves the vehicle body 2 forward with the bucket 3 plunged into the target, and brakes the wheels 5f, 5r when a rotational speed of the wheels 5f, 5r exceeds a predetermined threshold BS.
A control system 200 for a work machine includes a communication interface 18 that acquires a series of work instructions to a work machine 1 and an action control section 110 that controls an action of the work machine 1 so as to perform tasks included in the work instructions acquired by the communication interface 18. When the tasks included in the work instructions include an interrupting task to be preferentially performed and non-interrupting tasks other than the interrupting task, the action control section 110 performs the interrupting task after performing an action of the work machine 1 instructed by a task in execution.
A work machine diagnosis device includes: a display device that displays an operation procedure of a work machine; a controller that acquires a state quantity from a sensor that senses the state quantity of the work machine while the work machine is being operated in accordance with the operation procedure, and diagnoses actuation performance of the work machine on the basis of the state quantity of the work machine; and an output device that outputs a diagnosis result. The controller: measures, on the basis of a plurality of state quantities sensed by the sensor, an actuation performance value representing predetermined actuation performance of the work machine, and a plurality of causal parameters that influence the actuation performance value; computes a degree of influence of each of the plurality of causal parameters on the actuation performance value on the basis of measurement values of the plurality of causal parameters, and a reference value preset for each of the plurality of causal parameters; and causes the output device to output the actuation performance value and the degrees of influence.
An object of the present invention is to provide a work machine that makes it possible to perform, with a simple configuration, speed control of respective actuators and thrust control of a particular actuator that regenerates the flow of a return fluid, at the time of combined operation to simultaneously drive the particular actuator and another actuator. For this purpose, a controller calculates a target thrust that is a target value of a thrust of the particular actuator on the basis of an input amount of an operation device and an output value of a posture sensor, calculates a target meter-out pressure that is a target value of a meter-out pressure of the particular actuator on the basis of the target thrust and a meter-in pressure of the particular actuator, and calculates a regeneration control valve target opening area that is a target value of an opening area of a regeneration control valve on the basis of the target meter-out pressure and the meter-out pressure of the particular actuator.
The present invention intends to provide a work machine that can execute speed control of an actuator and torque control of a swing motor by a simple configuration at the time of combined operation to simultaneously drive the swing motor and the other actuator. For this purpose, a controller calculates a pump target flow rate on the basis of an actuator target flow rate and a swing target flow rate and calculates a target meter-in opening area of an actuator directional control valve on the basis of the actuator target flow rate, a pump pressure, and an actuator meter-in pressure. The controller calculates target torque of the swing motor on the basis of the input amount of operation devices and output values of posture sensors and calculates a swing target meter-out pressure on the basis of the target torque and a swing meter-in pressure. The controller calculates a target meter-out opening area of a swing directional control valve on the basis of the swing target meter-out pressure and a swing meter-out pressure.
This work machine comprises: an operation input controller that outputs an operation signal for driving a vehicle body and a work device; an attitude measurement controller that measures attitude information of the vehicle body and the work device in time series; a terrain measurement controller that measures a terrain shape around the work machine as peripheral environment information; a vehicle body state monitoring controller that measures vehicle body state information indicating the state of the vehicle body of the work machine; and a main controller. When a preset condition is satisfied, the main controller collects terrain data stored in a terrain temporary storage device of the terrain measurement controller in a data aggregation determination device via a vehicle body control communication line, and causes the terrain data to be stored in a main storage device. Thus, in a system composed of a plurality of controllers, the stored data can be recovered to the outside of the work machine while appropriately handling the large-capacity data without imposing a load on the communication of control signals over a network between the controllers.
Provided is a construction machine comprising first and second hydraulic actuators that are driven by first and second hydraulic pumps, respectively, and that drive a front work machine, a third hydraulic actuator that is driven by the second hydraulic pump, a solenoid valve that controls hydraulic oil to the second hydraulic actuator, an operation device that operates the front work machine, and a controller that controls the solenoid valve and the first and second hydraulic pumps on the basis of the distance between the front work machine and a target construction surface and an operation signal, wherein the controller calculates an upper limit speed of the second hydraulic actuator on the basis of a flow rate difference between the maximum read flow rate of the second hydraulic pump and a supply flow rate to the third hydraulic actuator, calculates a target speed of the second hydraulic actuator by limiting a requested speed for the second hydraulic actuator according to the operation signal to the upper limit speed, and controls the solenoid valve and the second hydraulic pump according to the target speed.
In the present invention, a hydraulic shovel (1) comprises: a vehicle body constituted of a self-propelled lower traveling body (2) and an upper revolving body (3); and a driver seat (9) provided to the upper revolving body (3). The upper revolving body (3) is provided with: a fuel cell (11) for generating electric power which is supplied to an electric motor (14); a hydrogen storage container (20) for storing hydrogen which is supplied to the fuel cell (11); a heat exchange device (24) for cooling the fuel cell (11); and cooling fans (25C, 25D, 26A, 27A) for supplying cooling air to the heat exchange device (24). With respect to the flow direction of cooling air (F1) generated by the cooling fans (25C, 25D, 26A, 27A), the driver seat (9) is disposed on the upstream side of the hydrogen storage container (20).
In the present invention, shock caused by frequent switching between a non-merging state and a merging state of pressure oil from two hydraulic pumps is suppressed. This work machine comprises: a hydraulic drive device that includes a first hydraulic pump, a second hydraulic pump, a first hydraulic actuator, and a merging valve that merges pressure oil and causes communication with the first hydraulic actuator; an operation member; and a controller. The controller controls the merging valve so as to supply pressure oil from the first hydraulic pump to the first hydraulic actuator until the operation member reaches the first position from the initial position, controls the merging valve so as to supply the merged pressure oil to the first hydraulic actuator when the operation member is operated past the first position in a direction in which the operation amount increases, and controls the merging valve so as to supply pressure oil from the first hydraulic pump to the first hydraulic actuator when the operation member reaches a second position closer to the initial position than the first position from any position past the first position.
The purpose of the present invention is to provide a hydraulic pump state monitoring device capable of diagnosing a hydraulic pump on the basis of a force conversion efficiency by measuring a characteristic amount related to the force conversion efficiency from input to output of the hydraulic pump. For this purpose, when the tilt amount of the hydraulic pump has become a predetermined tilt amount and the discharge pressure of the hydraulic pump has become a predetermined pressure, the controller calculates a characteristic amount related to the force conversion efficiency, which is the efficiency of conversion from the rotational force of the prime mover into the discharge pressure of the hydraulic oil of the hydraulic pump at the time when the discharge pressure has become the predetermined pressure.
This work machine is provided with a control device configured to: if an operational mode has been switched to a boarding operation mode, control the running of a work device in accordance with operation of an indoor operation device; and if the operational mode has been switched to a remote operation mode, control running of the work device in accordance with operation of a remote operation device. When a first mode switching operation to switch from the boarding operation mode to the remote operation mode has been performed by a mode switching operation unit, the time until the control device enables operation of the work device by the remote operation device is configured such that a second time, in which the operation of the work device by the remote operation device is enabled if the first mode switching operation is performed when a prime mover is working, is longer than a first time, in which the operation of the work device by the remote operation device is enabled if the first mode switching operation is performed when the prime mover is not working.
This electric transport vehicle comprises: a wheel load detector for detecting information about the wheel loads of a driving wheel and a driven wheel; and a control device for controlling an electric motor for driving the driving wheel. The control device has: a wheel load calculation unit that calculates a wheel load on the basis of the detected information of the wheel load detector; a tire force calculation unit that calculates a tire force of at least one of the driving wheel and the driven wheel; a slip index calculation unit that calculates a slip index of at least one of the driving wheel and the driven wheel; a friction coefficient calculation unit that calculates a friction coefficient by dividing the tire force of the calculation result by the wheel load of the calculation result; and a friction coefficient ratio calculation unit that calculates a friction coefficient ratio by dividing the friction coefficient of the calculation result by the slip index of the calculation result. The control device controls the drive of the electric motor on the basis of the friction coefficient ratio of the calculation result.
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
B60L 9/18 - Electric propulsion with power supply external to the vehicle using AC induction motors fed from DC supply lines
In the present invention, a dump truck (1) comprises: a cylindrical spindle (12); first and second bearings (16, 17) which are attached to the outer circumferential surface of the spindle (12) and rotatably support a wheel attachment cylinder (18) with respect to the spindle (12); a rotary shaft (14) which is provided on the inner circumferential side of the spindle (12) and transmits the rotation of a travel motor (13) to the wheel mounting cylinder (18); first and second temperature sensors (42, 43) which detect the temperatures of the first and second bearings (16, 17); and a control device (44) which determines abnormalities in the first and second bearings (16, 17) on the basis of the temperatures detected by the first and second temperature sensors (42, 43). The first and second temperature sensors (42, 43) are disposed on the inner circumferential side of the spindle (12).
Provided is a remote control system for a construction machine, which is capable of preventing the operation by an operator or the work of an worker around the construction machine from being obstructed. The remote control system is provided with: a remote-control changeover switch for instructing whether to enable or disable remote control of a shovel; a display lamp for displaying, around the shovel, a state in which remote control of the shovel is enabled; a work lamp for illuminating the periphery of the shovel; a work-lamp changeover switch for instructing whether to turn on or turn off the work lamp; and a vehicle body controller for controlling brightness of the display lamp. When it is instructed by the remote-control changeover switch and the work-lamp changeover switch to enable remote control and to turn on the work lamp, the vehicle body controller displays, around the shovel, the state in which remote operation is enabled, while lowering the brightness of the display lamp than when it is instructed by the remote-control changeover switch and the work-lamp changeover switch to enable remote control and to turn off the work lamp.
The present disclosure provides an operation assistance device capable of suppressing deterioration of a battery of an electric work machine and prolonging the service life of the battery. Provided is an operation assistance device 1 that allocates each of a plurality of electric work machines EWM1, EWM2, ... , EWMn to each of a plurality of work sites WS1, WS2, ... , WSn. The operation assistance device 1 comprises: an information storage unit 11 that stores information relating to the work load for each of the work sites WS; a state acquisition unit 12 that acquires the deterioration states of batteries B mounted on respective electric work machines EWM; a state estimation unit 13 that calculates estimated deterioration states of the batteries B for when each electric work machine EWM works at each work site WS; and an operation planning unit 14. The operation planning unit 14 selects the work sites WS in order from the highest work load on the basis of the information stored in the information storage unit 11 and, from among the plurality of electric work machines EWM1, EWM2, ... , EWMn, allocates specific electric work machines EWM to the selected work sites WS on the basis of the estimated deterioration states.
Provided is a work machine that can improve the precision of control by which the movement of a work device is limited to a prescribed range. In the present invention, a shovel comprises: a control valve that controls the flow of pressure oil to a hydraulic cylinder for a boom; a plurality of pilot electromagnetic valves that generate and output a pilot voltage to operate the control valve; a controller that has a limiting function to control the plurality of pilot electromagnetic valves so as to limit movement of a work device to a prescribed range; a fall prevention valve that has a fall prevention function to prevent falling of the boom; and an electromagnetic valve that outputs a signal to deactivate the fall prevention function of the fall prevention valve. The controller computes the deactivation pressure of the fall prevention valve on the basis of information relating to the limiting function and controls the electromagnetic valve so that the computed deactivation pressure is output to the fall prevention valve as the signal to deactivate the fall prevention function.
To promote execution of safety measures by allowing a user to accurately grasp an accident occurrence risk including a contact risk at a work site where a plurality of work machines operate. An operation history management system 100 includes a server 31 and a terminal device 34 for managing the operation history of a work machine 33. The server 31 comprises: an information storage device 312 that stores operation information of the work machine 33 with a time of acquisition of the operation information and position information of the work machine 33 at the time, and stores a map 60 including information of a landform 61 and a feature 62 of a work site 32; and an information processing device 311 that draws a movement trajectory of the work machine 33 operating at the work site 32 and another work machine 33 operating at the work site 32 on the map 60 on which the landform 61 and the feature 62 of the work site 32 are drawn, and displays the map 60 on a terminal device 34.
The present invention addresses the problem of providing a temperature management device that makes it possible to stably cool an electric motor. A temperature management device according to the present invention is a temperature management device 10 for an electric work machine comprising: an electric motor 120 that has a predetermined first management temperature range; a power supply device 110 that supplies electric power to the electric motor, and has a second management temperature range within the first management temperature range; a hydraulic pump 122 that is driven by the electric motor to increase the pressure of hydraulic oil to a predetermined pressure; and a work device that receives a supply of the hydraulic oil with the pressure increased by the hydraulic pump, and is driven with the predetermined pressure. The temperature management device comprises: a pump for pressure-feeding a liquid for heat exchange; a liquid pipe 16 in which a power source, an electric motor, and the pump are disposed, and through which the liquid is circulated; a heat exchange device 90 that exchanges heat with the liquid that has exchanged heat with the power source and the electric motor; and a temperature control unit 56 that controls the heat exchange device to maintain the temperature of the liquid within the second management temperature range.
B60K 1/00 - Arrangement or mounting of electrical propulsion units
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
B60L 58/26 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
B60L 58/27 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
B60P 1/16 - Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load supporting or containing element actuated by fluid-operated mechanisms
The purpose of the present invention is to provide an electric dump truck in which a direct current voltage generated between a battery serving as a motive power source of a traction motor and an inverter for driving the traction motor can be stabilized. A dump truck 1 includes a battery 2, traction motors 9 and 10, inverters 7 and 8, a DC-to-DC converter 3, a smoothing capacitor 5, a battery control device 6, and a vehicle control device 11. The battery control device 6 computes chargeable/dischargeable electric power of the battery 2 on the basis of the state of charge of the battery 2. The vehicle control device 11 acquires operation signals corresponding to acceleration/deceleration operations with respect to the traction motors 9 and 10, and computes torque command values to be output to the inverters 7 and 8 on the basis of the acquired operation signals and the chargeable/dischargeable electric power computed by the battery control device 6.
B60L 3/00 - Electric devices on electrically-propelled vehicles for safety purposesMonitoring operating variables, e.g. speed, deceleration or energy consumption
B60L 7/14 - Dynamic electric regenerative braking for vehicles propelled by AC motors
B60L 9/18 - Electric propulsion with power supply external to the vehicle using AC induction motors fed from DC supply lines
B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
For a mesh set A of an unclassified travel route, which is a travel route that has not been classified, and a mesh set B of a classified travel route, which is a travel route that has been classified, a union set of the mesh set A and the mesh set B, a first difference set of the union set and the mesh set A, and a second difference set of the union set and the mesh set B are calculated, and if the size of each of the first difference set and the second difference set is equal to or smaller than a threshold, the unclassified travel route is classified into a route ID of the classified travel route, and if at least one of the size of the first difference set and the second difference set is greater than the threshold, the unclassified travel route is classified into a new route ID. This makes it possible to classify the travel routes of mining vehicles easily and accurately.
G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
In a tire roller 1A, a heat exchanger 100 is disposed in front of a driver's seat 8 and to the rear of an engine room 70 (equipment storage chamber), a cooling fan 26f is disposed in front of the heat exchanger 100, an engine 22 (prime mover) is disposed in front of the cooling fan 26f, a hydraulic pump 25 is disposed in front of the engine 22, and an upper surface 72 serving as a cover is formed so as to be inclined obliquely downward from the rear toward the front of the engine room 70. With this configuration, the cover (upper surface 72) of the engine room 70 can be inclined obliquely downward from the rear toward the front without lowering the mounting position of the heat exchanger 100. As a result, it is possible to suppress capacity reduction of a water tank 30 disposed below the engine room 70, and to ensure visibility for a driver of the front oblique lower side of a vehicle body 2.
The purpose of the present invention is to provide an information input system for a work machine, the information input system being capable of carrying out various settings of the work machine by using an information terminal while preventing erroneous operations of the work machine. For this purpose, provided is an information input system for a work machine, said information input system comprising a control device mounted on a work machine and an information terminal for inputting information to the control device via communication, wherein the input of information to the control device from the information terminal is invalidated when the information terminal is located at a prescribed position in a driver's cab of the work machine.
B60R 16/02 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric
B60R 16/023 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for transmission of signals between vehicle parts or subsystems
Provided is a construction machine comprising: an electric motor that serves as a power source; a heat exchanger; a fuel cell that generates power to be supplied to the electric motor; a cooling fan that blows cooling air to the heat exchanger; and a fan control device that controls rotation of the cooling fan. In the construction machine, a hydrogen gas detection sensor is provided in a machine room in which the heat exchanger, the fuel cell, and the cooling fan are disposed, and the fan control device increases the rotational speed of the cooling fan when the hydrogen gas detection sensor has detected hydrogen gas.
The present invention is provided with: a vehicle body; an electric motor serving as a power source; a fuel cell that generates electricity to be supplied to the electric motor; a battery that stores the electricity generated by the fuel cell; an inclination angle sensor that detects the inclination of the vehicle body; and a control device. When the detection result from the inclination angle sensor is equal to or greater than a predetermined inclination angle threshold value, the control device switches, from the fuel cell to the battery, the supply of electricity to the electric motor. This being the case, it is possible to prevent the drainage of generated water produced during a power generation process of the fuel cell from stagnating, even when the vehicle body is inclined.
This work assistance system for a work machine that provides work assistance information to an operator who operates the work machine comprises: an orientation sensor that detects the orientation of a work device of the work machine; a monitor; a guidance device that controls the display of the monitor; and a setting device that sets a work limit position that is the position of a boundary for limiting the vertical movable range of the work device, and a target surface of the work performed by the work device, wherein the guidance device causes the monitor to simultaneously display the positional relationship between the work device and the target surface and the positional relationship between the work device and the work limit position, on the basis of the orientation of the work device detected by the orientation sensor and the work limit position and the target surface set by the setting device. As a result, it is possible to achieve both work efficiency and convenience even in a situation in which the target surface and limit position of the work range are set.
The purpose of the present invention is to provide a hydraulic drive device capable of accurately estimating the deterioration state of an opening/closing valve for opening and closing an oil passage that connects a hydraulic pump and an actuator. To achieve the foregoing, in the present invention a controller: calculates a first valve opening delay time from when a first valve opening command signal (valve opening command value), instructing opening of the first opening/closing valve, is output, to when the first opening/closing valve is opened; calculates a first valve closing delay time from when a first valve closing command signal (valve closing command value), instructing closing of the first opening/closing valve, is output, to when the first opening/closing valve is closed; and determines the deterioration state of the first opening/closing valve on the basis of the first valve opening delay time and the first valve closing delay time.
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
Provided is a work machine in which a counterweight can be appropriately mounted. A work machine comprising a vehicle body, a counterweight disposed rearward of the vehicle body, a support bracket fixed to the vehicle body, a main arm of which a base-end part is rotatably supported by the support bracket and of which a distal-end part is rotatably connected to the counterweight via a connection member, and a hydraulic cylinder of which a base-end part is rotatably supported by the support bracket and of which a distal-end part is rotatably connected to the distal-end side of the main arm. The main arm is upwardly rotated by extension of the hydraulic cylinder to attach the counterweight to the vehicle body, and the main arm is downwardly rotated by contraction of the hydraulic cylinder to detach the counterweight from the vehicle body. The support bracket is provided with an auxiliary arm that is driven in conjunction with upward rotation of the main arm due to extension of the hydraulic cylinder, the auxiliary arm pulling the counterweight toward the support-bracket side.
Provided is a vehicle body information management system that collets vehicle body information by an appropriate method conforming to a predetermined wireless communication restriction such as a permanent roaming restriction. This vehicle body information management system comprises: a communication terminal that is mounted on a construction machine; and a server that acquires vehicle body information of the construction machine from the communication terminal. The communication terminal comprises a first slot into and from which a roaming SIM to be wirelessly connected to an optimum base station for the construction machine is inserted and removed regardless of a country to which a communication carrier belongs, a second slot into and from which a local SIM to be wirelessly connected to only a base station of a communication carrier of a carry-in country in which the construction machine has been carried is inserted and removed, and a communication controller for controlling the wireless communication of the communication terminal. The communication controller transmits the vehicle body information to the server by using the roaming SIM if it is determined that permanent roaming is permitted in the carry-in country, and transmits the vehicle body information to the server by using the local SIM if it is determined that the permanent roaming is restricted in the carry-in country.
H04M 11/00 - Telephonic communication systems specially adapted for combination with other electrical systems
H04M 1/00 - Substation equipment, e.g. for use by subscribers
H04M 1/675 - Preventing unauthorised calls from a telephone set by electronic means the user being required to insert a coded card, e.g. a smart card carrying an integrated circuit chip
Provided is work machinery, comprising a chassis with an operator cab, a front work machine attached to the chassis, a monitor provided in the operator cab, and a controller that causes the monitor to display operation assistance information that includes information on the position of a prescribed site on the front work machine, wherein the controller: receives, from an external measurement device mounted on the periphery of the chassis, information on the coordinates of two or more designated points with respect to each of mobile members that form the front work machine, the coordinates being measured by the external measurement device; computes a first position as a position of the prescribed site on the basis of the coordinates of the designated points received from the external measurement device; and causes the monitor to display, as the operation assistance information, first operation assistance information that includes the information on the first position. Thus, operation assistance for the work machinery can be provided to the operator even if the work machinery is not provided with an on-board sensor for which an angle of attachment has been calibrated.
This work machine is provided with: a vehicle body; a work device attached to the vehicle body; an acceleration sensor attached to the vehicle body or the work device; and a control device. The control device: determines which of a plurality of operating states the work machine is in on the basis of the operation information thereof; performs weighting according to the degree of influence of vibration for each operating state, on the basis of the detection result of the acceleration sensor; calculates an accumulated load representing the accumulated value of the load acting on the work machine for each operating state; calculates a total accumulated load by adding up the accumulated load of each operating state; and outputs the total accumulated load.
Provided is a work machine comprising: a first hydraulic actuator that uses a plurality of hydraulic pumps as hydraulic sources; a plurality of pump merging valves that control the flow rate of pressure oil supplied from the plurality of hydraulic pumps to the first hydraulic actuator; a second hydraulic actuator that shares the hydraulic sources with the first hydraulic actuator; and a controller that controls the plurality of pump merging valves. The controller stores priority pump data defining a priority pump corresponding to the first hydraulic actuator for each operation load pattern, controls the plurality of pump merging valves while identifying the priority pump on the basis of the priority pump data according to the operation load pattern at the time when the first operation device is operated, and updates the priority pump data by learning from operation signals of the first and second operation devices and the load pressure of the first hydraulic actuator. This makes it possible to determine an appropriate priority pump for each hydraulic actuator in various scenes regardless of judgement by an operator.
A hydraulic shovel 1 comprises: a machine body 10 including a lower traveling body 2, an upper revolving body 4 revolvable on the lower traveling body 2, and a work device 5 attached to a front central section of the upper revolving body 4; and a plurality of machine-body-side antennas 60 attached to the upper revolving body 4. Communication is performed between the plurality of machine-body-side antennas 60 and radio-wave-satellite-side antennas 70 disposed outside the machine body 10. The plurality of machine-body-side antennas 60 include: front antennas 61 which are disposed more toward the front, in the front/rear direction of the machine body 10, than the revolving center 4a of the upper revolving body 4, at least one of the front antennas being provided to, in the left/right direction, the left and the right, so as to sandwich the work device 5; and at least one rear antenna 62 disposed more toward the rear, in the front/rear direction, than the turning center 4a.
E02F 3/30 - DredgersSoil-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
E02F 9/00 - Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups
This transport vehicle comprises a steering circuit including: a steering cylinder steered by hydraulic oil of a hydraulic pressure source; a steering valve that controls the flow of the hydraulic oil to the steering cylinder; and an accumulator that stores the hydraulic-oil pressure from the hydraulic pressure source and that can supply the pressure to the steering cylinder via the steering valve. The steering circuit is connected to the hydraulic pressure source and a hydraulic oil tank via a composite control valve. The composite control valve has: a first position at which communication is enabled between the steering circuit and the hydraulic pressure source and at which communication is shut-off between the steering circuit and the hydraulic oil tank; and a second position at which communication is enabled between the steering circuit and the hydraulic pressure source and at which communication is enabled between the steering circuit and the hydraulic oil tank. The composite control valve includes a narrowed section in an oil path that enables communication between the steering circuit and the hydraulic oil tank, at the second position.
B62D 5/07 - Supply of pressurised fluid for steering also supplying other consumers
B60P 1/16 - Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load supporting or containing element actuated by fluid-operated mechanisms
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
Provided is a hydraulic control system for a construction machine which makes it possible to prevent erroneous detection of the occurrence of jerky travel when a travel operation pedal is operated and thereby obtain suitable travel operability. To this end, a controller calculates a target operating pressure corresponding to the operation amounts of a travel operation lever and the travel operation pedal on the basis of an operation signal from a travel operation device, inputs a control operating pressure generated by a travel solenoid proportional control valve and detected by a pressure sensor, calculates the pressure difference between the target operating pressure and the control operating pressure, and determines whether jerky travel has occurred on the basis of a change in the pressure difference.
This electric dump truck ensures a hydraulic source necessary when being towed without depending on an external hydraulic source, while preventing early deterioration of a battery. The electric dump truck 1 comprises: a travel motor 16; a hydraulic pump 20 that supplies pressure oil to at least one among a brake device 17 and a steering device 18; a hydraulic pump drive motor 23 that drives the hydraulic pump 20; a battery 24 that supplies power to the travel motor 16 and the hydraulic pump drive motor 23; and a control device 37 that controls power supply from the battery 24 to the travel motor 16 and the hydraulic pump drive motor 23. In a towed mode in which the dump truck 1 is towed, the control device 37 performs control to supply the power of the battery 24 only to the hydraulic pump drive motor 23.
B60L 3/00 - Electric devices on electrically-propelled vehicles for safety purposesMonitoring operating variables, e.g. speed, deceleration or energy consumption
B60L 7/14 - Dynamic electric regenerative braking for vehicles propelled by AC motors
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
A dump truck, wherein a control device: generates a display screen image 100 including a charging power display section 130 that displays the magnitude of charging power to be charged to a battery within regenerative power, and a consumed power display section 140 that displays the magnitude of consumed power consumed by a power-consuming device; and causes a display device to display the display screen image. With this configuration, a driver can recognize the extent of charging power or consumed power per unit time corresponding to the current depression amount of a brake pedal, and regenerative power can be efficiently recovered by prompting the driver to operate brakes appropriately.
B60L 3/00 - Electric devices on electrically-propelled vehicles for safety purposesMonitoring operating variables, e.g. speed, deceleration or energy consumption
B60K 35/00 - Instruments specially adapted for vehiclesArrangement of instruments in or on vehicles
B60L 7/22 - Dynamic electric resistor braking, combined with dynamic electric regenerative braking
B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
This transport vehicle comprises: a first control valve device having a plurality of switching positions that are switched by the operation of an operation device in a driver's cabin, and controlling supply/discharge of pressure oil to/from a hoist cylinder; a pilot circuit that generates, from a pilot hydraulic source, pilot pressure for driving the first control valve device; and a steering circuit including a steering cylinder for steering a steering wheel, and an accumulator for storing pressure usable as an emergency hydraulic source of the steering cylinder. The transport vehicle further comprises a second control valve device provided on a connection line that connects the steering circuit and the pilot circuit, and a control device for controlling the second control valve device in accordance with the state of the pilot hydraulic source. The control device causes the the second control valve device to switch between a cutoff position for cutting off pressure oil supply from the accumulator to the pilot circuit, and a supply position where pressure oil can be supplied.
B60P 1/16 - Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load supporting or containing element actuated by fluid-operated mechanisms
B62D 5/07 - Supply of pressurised fluid for steering also supplying other consumers
The present disclosure provides a work vehicle with which it is possible to suppress an increase in the size and weight of a power reception device that supplies power supplied from a trolley overhead wire to a battery and an electric motor, and to improve the efficiency of work including transportation work. A work vehicle (100) comprises: a battery control device (140) that controls charging power supplied from a power reception device (110) to a battery (120); a motor control device (150) that controls traveling power supplied from the power reception device (110) to an electric motor (130); and a power control device (160) that calculates allocations of the charging power and the traveling power with respect to the received power of the power reception device (110) within a range in which the total of the charging power and the traveling power does not exceed the rated capacity of the power reception device (110), and controls the battery control device (140) and the motor control device (150) so that the allocated powers are supplied from the power reception device (110) to the battery (120) and the electric motor (130).
B60L 50/53 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
The present disclosure provides a trolley power-receiving type electric dump truck that can more reliably bring a battery closer to a fully charged state in a power reception section in which a trolley overhead wire is installed. A trolley power-receiving type electric dump truck 100 comprises: a battery 110 that is charged by electric power supplied from a trolley overhead wire 1; an electric motor 120 for travel, the electric motor 120 being driven by electric power supplied from the trolley overhead wire 1 or electric power supplied from the battery 110; and a control device 200 that controls the battery 110 and the electric motor 120. The control device 200 comprises a speed calculation unit 242 that calculates a charging travel speed by which the battery 110 can be charged to a fully-charged state in the power reception section in which the trolley overhead wire is installed, the charging travel speed being calculated on the basis of the route length of the power reception section, a pre-recorded capacity of the battery 110, and detected values of a charge state, a charging current, and a charging voltage acquired from the battery 110.
B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
B60L 5/26 - Half-pantographs, e.g. using counter-rocking beams
B60L 13/00 - Electric propulsion for monorail vehicles, suspension vehicles or rack railwaysMagnetic suspension or levitation for vehicles
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
B60L 50/53 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/35 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
Provided is a wheel loader capable of reducing a sense of incongruity given to an operator and a load applied to a hydraulic drive device while enabling accurate loading of a load of a target loading weight to a loading destination. In the wheel loader 1 in which an operation of a bucket 23 is automatically controlled by a controller 5, when it is determined that a reduction amount Wd of the weight of a load in the bucket 23 accompanying a soil discharge operation reaches a target discharge amount Wt, the controller 5 outputs an automatic tilt command signal to a hydraulic drive device 402, and when it is determined that the reduction amount Wd does not reach the target discharge amount Wt, the controller 5 selects a command signal having a smaller angle amount of forward inclination of the bucket 23 from among a first automatic dump command signal for commanding a first automatic dump operation in which the bucket 23 is automatically inclined forward by only a predetermined first angle amount, and a dump command signal for commanding a dump operation in which the bucket 23 is inclined forward by only an angle amount different from the first angle amount, and outputs the selected command signal to the hydraulic drive device 402.
Provided is a control system for a work machine with which excavation operation can be continuously executed without incomplete excavation and interruption of work in automatic excavation control of the work machine. A re-planning necessity determination unit 207 determines necessity of re-planning of the excavation trajectory during vehicle body operation. When the re-planning necessity determination unit 207 determines that re-planning is required, a re-planning unit 204 re-plans the excavation trajectory during the vehicle body operation.
The present disclosure provides a vehicle control device capable of preventing the electricity shortage state of a work vehicle over the entire scheduled route on which the work vehicle travels and capable of suppressing a decrease in work efficiency. A vehicle control device 110 comprises a section information acquiring unit 111 and a travel control unit 112. The section information acquisition unit 111 acquires section information that is information on a section included in a scheduled route of the work vehicle. The section information includes: information on one or more charging sections in which a power supply device 40 is installed and the work vehicle travels while a power storage device 17 is being charged; and information on one or more non-charging sections in which the power supply device 40 is not installed and the work vehicle travels by supplying the power of the power storage device 17 to a travel device 18 while consuming the power of the power storage device 17. The travel control unit 112 controls the travel device 18 so that the charged power amount of the power storage device 17 at an end point of each charging section becomes larger than the power consumption amount of the travel device 18 in a non-charging section starting from the end point.
B60L 50/53 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/04 - Regulation of the charging current or voltage
The purpose of the present invention is to provide a work machine that can prevent a setting state of an installed apparatus from being changed by an unintended rotation operation when said rotation operation is performed on an input device that directs setting changes in the installed apparatus in response to movement operations and rotation operations. In order to do so, this work machine is provided with: a machine body; an installed apparatus that is installed on the machine body; an input device that can be subjected to movement operations and rotation operations; and a control device that performs installed apparatus setting processing in response to movement operations of the input device and rotation operations of the input device, wherein when a movement operation of the input device and a rotation operation of the input device are simultaneously inputted, or when the period from the completion of one operation among a movement operation of the input device and a rotation operation of the input device until the start of the other operation is shorter than a prescribed determination period, the control device performs restriction processing to restrict the installed apparatus setting processing corresponding to the rotation operation of the input device.
A solenoid valve (1) comprises a sleeve (22), a spool (23), and a filter (31). The filter (31) has a first filter (32) and a second filter (33). The first filter (32) is wound around the outer peripheral surface of the sleeve (22) in a state in which a portion of the outer peripheral surface in the circumferential direction is exposed. The second filter (33) is wound around the outer peripheral side of the first filter (32), and both circumferential ends (33A, 33B) are affixed to the portion exposed by the first filter (32) on the outer peripheral surface of the sleeve (22).
This work machine is provided with a control device that controls a return operation for moving a bucket of a front work device toward the excavation start position. The control device determines, with respect to peripheral objects detected by a peripheral object detecting device, whether or not contact with the bucket is possible. For a peripheral object determined to be able to be contacted among the peripheral objects, the control device operates an upper revolving body and the front work device so that the return operation is performed along a movement path in which the bucket contacts the peripheral object.
Provided is a transportation vehicle in which a cleaning function of an exhaust gas purification device is achieved while an increase in weight and cost is suppressed. This transportation vehicle includes: a diesel engine; a generator; a traveling motor that generates a driving force for rotating a tire with electric power generated by the generator and generates electric power by braking of the tire; a grid box that converts the electric power generated by the generator and/or the traveling motor into heat and consumes the heat; an exhaust gas purification device that removes harmful substances contained in exhaust gas generated from the diesel engine; and a controller which, when a load required for increasing the temperature of the exhaust gas to a cleaning temperature is generated by the generator and it is determined that additional electric power, which is additionally generated by the generator, can be consumed in the grid box, causes electric power to be additionally generated by the generator, the harmful substances accumulated in the exhaust gas purification device to be removed, and the generated additional electric power to be additionally consumed in the grid box.
F01N 3/18 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl
B60W 20/16 - Control strategies specially adapted for achieving a particular effect for reducing engine exhaust emissions
H02P 9/04 - Control effected upon non-electric prime mover and dependent upon electric output value of the generator
Provided is a work machine with which the appropriate action for an obstacle can be selected and decreases in work efficiency can be prevented. The work machine comprises an object detection device that detects objects, and a control device that, on the basis of a detection result from the object detection device, performs autonomous travel control so that the work machine follows a predetermined travel route. The control device is provided with an object detection history management unit 111 that manages a history of the object detection performed by the object detection device, and an action determination unit 110 that determines an action of the machine with respect to the object in accordance with the object detection history of the object detection history management unit 111. The control device performs autonomous travel control for the work machine on the basis of the action of the machine determined by the action determination unit 110.
The purpose of the present invention is to provide an electric drive system capable of maintaining a DC voltage on the auxiliary winding side with one power converter provided on the auxiliary winding side regardless of the rotational speed of a two-winding induction generator and the magnitude of a load on the auxiliary winding side. In order to achieve the above-described purpose, in the present invention, a control device: calculates a first d-axis current command value of an auxiliary winding on the basis of a first DC voltage and the command value of the first DC voltage; calculates a second d-axis current command value of the auxiliary winding on the basis of the rotational speed of a generator and the required power of an auxiliary machine; in a traction state, controls a power converter so that the d-axis current value of the auxiliary winding matches the first d-axis current command value; and, in a retardation state or an idling state, controls the power converter so that the d-axis current value of the auxiliary winding matches the second d-axis current command value.
H02P 9/04 - Control effected upon non-electric prime mover and dependent upon electric output value of the generator
B60L 1/00 - Supplying electric power to auxiliary equipment of electrically-propelled vehicles
B60L 7/14 - Dynamic electric regenerative braking for vehicles propelled by AC motors
B60L 9/18 - Electric propulsion with power supply external to the vehicle using AC induction motors fed from DC supply lines
B60L 50/10 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
E02F 9/00 - Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups
The present invention aims to provide a power generation system capable of reducing the capacity of a converter that supplies reactive power required for excitation of a two-winding cage induction generator and generation of leakage magnetic flux. To this end, this power generation system comprises: an induction generator having a primary winding including a main winding and an auxiliary winding and a secondary conductor; a diode bridge connected to the main winding and converting AC power generated in the main winding into DC power; and a converter connected to the auxiliary winding, exciting the induction generator and converting the AC voltage generated in the auxiliary winding into DC voltage, the power generation system being provided with a capacitor connected to the primary winding of the induction generator and supplying reactive power to the induction generator, the capacitor being connected to the main winding in parallel with the diode bridge.
H02P 9/04 - Control effected upon non-electric prime mover and dependent upon electric output value of the generator
B60L 7/14 - Dynamic electric regenerative braking for vehicles propelled by AC motors
B60L 9/18 - Electric propulsion with power supply external to the vehicle using AC induction motors fed from DC supply lines
B60L 50/10 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
The invention of the present application has an object of providing a mine management system capable of separately sensing an abnormality of a powertrain system and a load amount sensor of a mine dump truck. For this purpose, a mine management system for managing mine dump trucks operating in a mine includes a processing device that calculates and totalizes a productivity index of the mine dump trucks, in which the processing device: calculates consumed energy of the mine dump truck on the basis of at least a vehicle velocity of the mine dump truck, a road surface gradient, and a load amount; calculates input energy of the mine dump truck on the basis of at least one of a fuel injection amount, trolley electric power, and battery electric power of the mine dump truck; and determines presence or absence of an abnormality of a load amount sensor or a powertrain system of the mine dump truck on the basis of the consumed energy and the input energy.
An action management section 211 acquires a work instruction 230, which includes a final target position, and a current position of a work machine 100 to set a target position, a route planning section 212 generates a target route 240 between the current position and the target position, an operation generation section 213 causes the work machine 100 to travel in accordance with the target route 240, and upon receiving an evacuation instruction 250 including evacuation possible positions based on a work range of another work machine different from the work machine 100, the action management section 211 decides an evacuation position from among the evacuation possible positions based on the work range of the other work machine and at least one of the current position and final target position of the work machine 100 to set it to the target position.
A work machine includes: a main circuit that supplies a working fluid from a pump to an actuator; a pilot circuit that introduces part of the working fluid from the pump, to a pilot pressure receiving section of a control valve; a bleed-off passage that connects the pump and a tank. The pilot circuit is provided with: a first pressure reducing valve that generates a pilot primary pressure; and second and third pressure reducing valves that generate a pilot secondary pressure to be applied to the control valve and a bleed-off valve. A moving area of a spool of the bleed-off valve has a first moving area where an opening area of a restrictor changes stepwise, and a second moving area where the opening area of the restrictor changes continuously. A controller controls the third pressure reducing valve such that the spool is positioned in the first moving area at the time of non-operation of the actuator, and the spool is positioned in the second moving area at the time of operation of the actuator. The restrictor of the bleed-off valve has a restricting hole that gives a resistance to the working fluid passing therethrough in a case the spool is positioned in the first moving area.
01 - Chemical and biological materials for industrial, scientific and agricultural use
02 - Paints, varnishes, lacquers
04 - Industrial oils and greases; lubricants; fuels
Goods & Services
(1) Industrial chemicals; chemical preparations for scientific purposes, other than for medical or veterinary use; nitrogen compounds; chemical additives for gasoline; chemical additives for fuel; chemical preparations for decarbonising engines; chemical additives for use with internal combustion engine fuels; fuel-saving preparations; transmission fluids; power steering fluid; brake fluid; fluids for hydraulic circuits; anti-freeze for vehicle radiators; anti-freeze chemicals; chemical additives for lubricants; hydraulic fluids; hydraulic oils.
(2) Coating compositions in the nature of paint; anti-rust preparations; anti-rust greases.
(3) Industrial oils; lubricating oils; lubricants for industrial purposes; industrial greases; grease for machines; lubricating grease; engine oils; gear oils; liquid fuels; gases for use as fuel; biodiesel fuel; diesel fuel; hydrogen fuel; non-chemical additives for engine oils; non-chemical additives for fuels, lubricants and greases.
This control device for a work machine comprises: a hydraulic pump that is driven by a prime mover, and supplies hydraulic oil to a hydraulic actuator; a volume control device that controls the volume of the hydraulic pump in accordance with a control input; a volume sensor that detects an actual volume measurement value of the hydraulic pump; and a controller that acquires a target volume value of the hydraulic pump, and outputs a control input according to the target volume value to the volume control device. A mathematical model for predicting the volume of the hydraulic pump is stored in the controller. The controller calculates a predicted volume value of the hydraulic pump, using the mathematical model, calculates an optimal control input on the basis of the predicted volume value and control input constraints, calculates an assessment value on the basis of the target volume value and the actual volume measurement value, and changes the control input constraints in accordance with the assessment value.
This remote operation-type work machine system includes a hydraulic excavator that can be remotely operated and a remote operation device that remotely operates the hydraulic excavator, and further includes a remote operation signal processor as a system control device that controls the operation of the hydraulic excavator on the basis of remote operation signals from the remote operation device. If the remote operation signal is a remote start operation signal for starting the hydraulic excavator or a remote stop operation signal for stopping same, the system control device determines whether the prime mover is allowed to start or stop by importing: ambient information detected by an ambient detection device of the hydraulic excavator; and posture information detected by a posture detection device.
A work machine is capable of appropriately setting a target locus and target postures for a work implement depending on an excavation environment and an excavation object under automatic excavation control. To accomplish this, a controller calculates a target locus passing through an excavation starting position where a control point is positioned when an excavation is started, an excavation-in-progress position where the control point is positioned when the excavation is in progress, and an excavation finishing position where the control point is positioned when the excavation is finished, and a target posture for the work implement at the time the control point moves on the target locus. The controller controls a control valve such that the control point moves on the target locus and such that a posture of the work implement at the time where the control point moves on the target locus matches the target posture.
A controller of a work machine computes a target velocity of a fluid pressure actuator according to an operation signal from an operation device, computes target thrust or target torque of the fluid pressure actuator on the basis of a driven state of the fluid pressure actuator, and controls a velocity of the fluid pressure actuator by a meter-out control valve on the basis of the operation signal from the operation device and controls at least one of a pump and a meter-in control valve such that a pressure on a meter-in side of the fluid pressure actuator is equal to or higher than a predetermined value when a positive or negative sign of the target velocity as a computation result is different from a positive or negative sign of the target thrust or the target torque as a computation result.
F15B 11/028 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force
F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line
F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
A control device constituting this autonomous travel system: calculates a predicted arrival time, which is the time it takes for a transport vehicle to reach the position of an obstacle, on the basis of the position of the obstacle and the position and travel speed of the transport vehicle; calculates a predicted position of another vehicle after the predicted arrival time has elapsed, on the basis of the position and travel speed of the other vehicle and the predicted arrival time; if it is determined that the other vehicle is present near the obstacle after the predicted arrival time has elapsed, sets the current travel lane as an avoidance area; if it is determined that the other vehicle is not present near the obstacle after the predicted arrival time has elapsed, sets both the travel lane and a lane adjacent to the travel lane as avoidance areas; and generates an avoidance path within the avoidance area(s) for the transport vehicle to avoid the obstacle, on the basis of the position of the transport vehicle, the position of the obstacle, and the avoidance area(s).
Whether or not a plurality of actuators driving a plurality of structures of a work device respectively are in an overloaded state or a stopped state is determined, and in a case where any of the plurality of actuators is determined to be in the overloaded state or the stopped state, the amount of pressure oil to be supplied to the actuator selected on the basis of the determination result is corrected. By appropriately controlling the actuator operation in accordance with the speed of the work device and the load condition of the actuator, a more efficient excavation operation can be achieved.
Provided is a wheel loader that makes it possible to suppress the execution of automatic excavation not intended by an operator. The present invention pertains to a wheel loader 1 capable of performing bucket detent control for holding a bucket 23 in an orientation in which the bottom surface of the bucket 23 is parallel to the ground contact surface of a vehicle body and automatic excavation control in which excavation of an object to be worked on is performed automatically, wherein a controller 5, 5A executes processing regarding the bucket detent control and, when lift arm force F is greater than a predetermined work device load Fth, determines that excavation of the object to be worked on will start and executes processing relating to the automatic excavation control.
A work machine includes: a first pump and a second pump that are driven by an engine; a hydraulic actuator driven by a hydraulic working fluid supplied from the first pump; a control valve that controls a flow of the hydraulic working fluid supplied to the hydraulic actuator; a solenoid valve that reduces a pressure of the second pump to generate a pilot pressure for operating the control valve; a controller that controls the solenoid valve; an engine operating section that enables operation for activating the engine; and a rotation speed sensor that senses a rotation speed of the engine. The controller applies a drive current to the solenoid valve to drive the solenoid valve when a current application condition is established, the current application condition including that it is assessed, on the basis of a sensing result of the rotation speed sensor, that the engine is in a stopped state, and including that ON operation of the engine operating section is performed in a state where activation operation is not performed by the engine operating section.
E02F 3/32 - DredgersSoil-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
A base arm (11) is formed as a cylindrical body comprising a left side plate (11A) and a right side plate (11B) facing at an interval in a direction orthogonal to the length direction, and a second up/down sieve shaft (24) and a second opening/closing sieve shaft (29) are disposed between an upper guide arm coupling pin (13B) and a lower guide arm coupling pin (14B) in the up-down direction of the base arm (11). The base arm (11) is provided with a reinforcing plate (12) extending in the length direction of the base arm (11) in a state in which the left side plate (11A) and the right side plate (11B) are coupled, and a part of the reinforcing plate (12) is disposed between the upper guide arm coupling pin (13B) and the lower guide arm coupling pin (14B) in the up-down direction of the base arm (11).
E02F 3/39 - Cantilever beamsDipper-armsBucket-arms with telescopic arms
E02F 3/47 - DredgersSoil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes with grab buckets
The purpose of the present invention is to provide a construction machine on which a controller is mounted without blocking the visual field of an on-board operator and which can reduce time for maintenance of the controller. To achieve the purpose, a hydraulic shovel is provided with: a vehicle body having a work device; a cab provided to the vehicle body; an operation device for operating the work device and provided in the cab; a ceiling cover that covers at least a portion of the ceiling in the cab from below; and a first controller that controls the work device during remote operation or during automatic driving. The first controller has a reset button for reactivation, and is disposed between the ceiling and the ceiling cover with the reset button facing downward. The ceiling cover is attached to a position where the first controller is covered from below, and has an opening for exposing the reset button in the cab.
An object of the present invention is to provide a monitoring system, a monitoring device, and a construction machine each capable of improving the convenience for a user during monitoring while ensuring security related to the leakage of video data of a peripheral region. In a monitoring system 10 of the present invention, a monitoring device 30 reads information related to an access ID from a first authentication-related information display portion 208 arranged outside an operator's cab of a construction machine 20, using a second camera 300, and also reads information related to an access password from a second authentication-related information display portion 210 arranged in the operator's cab, using the second camera 300. The access ID may include a combination of the identification number of the construction machine 20 and a code representing the type of the construction machine 20.
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
H04N 21/475 - End-user interface for inputting end-user data, e.g. PIN [Personal Identification Number] or preference data
Provided is a work machine control system which enables a worker to perform a work more easily in the vicinity of a work machine executing a task automatically. A work machine control system comprises: a work machine that executes a task automatically as a work to be executed; and a task control device for controlling execution of the task. The work machine comprises a vehicle body control device and a hydraulic actuator used for executing the task, wherein the vehicle body control device comprises: a task content input section for receiving input of task content information; a movement control section for calculating a speed instruction of the hydraulic actuator based on the task content information; a receiving section for receiving task control information outputted from the task control device having a task control input section for receiving input of the task control information; and a task control section for controlling execution of the task based on the task control information.
The present disclosure provides an electronic control device capable of suppressing variations in the position of a work machine calculated based on satellite signals received by a GNSS terminal due to changes in the GNSS communication environment, and eliminating the position error after improvement of the communication environment in a shorter time than before. The electronic control device includes: a positioning quality determination section 211 that determines whether the positioning quality is good or poor based on GNSS information; a traveling state determination section 212 that determines the traveling state, including a stop state, based on the velocity of the work machine; and a smoothing section 213 that performs smoothing processing to the GNSS information. The smoothing section 213 changes the processing intensity to weak if the smoothing condition is not satisfied, the condition being that the positioning quality is good and the traveling state is stop, and changes the processing intensity to strong after a time equivalent to update cycle since the smoothing condition has been satisfied.
G01S 19/39 - Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
G01S 19/49 - Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system whereby the further system is an inertial position system, e.g. loosely-coupled
In the present invention, a frame upper space (14) is formed on a turning frame (5), the frame upper space being surrounded on the front, rear, right, and left sides by: a foot part (4A1) of a lower boom (4A) constituting a work device (4); an engine (7) serving as a motive power source; a cab (9); a cover member (10) serving as a right-side structure; a fuel tank (11); and a hydraulic oil tank (12). An accumulator (15) and a relief valve (20) are disposed in the frame upper space (14). Thereabove, the relief valve (20) is disposed at a higher position than a piping connection part (15A) of the accumulator (15).
Provided is a machine state detecting device capable of easily detecting the state of a machine, regardless of whether an unknown operation that is not expected to cause damage is performed. A state detecting device 100 includes a collection device 1a that collects, at a plurality of times, state information if indicating the state of the machine that changes chronologically, and an arithmetic processing device 1b that processes a plurality of pieces of the state information if collected at the plurality of times to detect the state of the machine. The arithmetic processing device 1b includes: a classification process section 1i that classifies a feature amount vector having the type of the state information if as a feature amount into any of a plurality of clusters, and provides a classification ID; a detection process section 1j that detects a damage the machine received, based on state information 1g indicating the state of the machine that changes chronologically; and a tying process section 1l that ties an interval in which the damage was detected by the detection process section 1j to the classification ID provided in the interval by the classification process section 1i.
Provided is a dump truck capable of switching a destination of supply of hydraulic oil from a hoist cylinder to a fan motor at an appropriate time. A dump truck comprising: a hydraulic pump for discharging a hydraulic oil by a driving force of the engine; a hoist cylinder for raising and lowering a vessel by the hydraulic oil supplied from the hydraulic pump; a fan motor for driving a fan that supplies a radiator with cooling air by the hydraulic oil supplied from the hydraulic pump; a selector valve capable of being switched between a first position for supplying the hoist cylinder with the hydraulic oil discharged from the hydraulic pump and a second position for supplying the fan motor with the hydraulic oil; and a controller configured to, in a case where the selector valve is in the first position, determine whether an inflow pressure of the hydraulic oil flowing into the selector valve is less than a threshold value, and in a case of determining that the inflow pressure is less than the threshold value, switch the selector valve from the first position to the second position.
B60P 1/16 - Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load supporting or containing element actuated by fluid-operated mechanisms
Provided are a work machine and a work machine system that reduce risk that a vehicle body comes into contact with an obstacle nearby in a case wherein abnormality arises in the work machine. The work machine comprises: a traveling body; a rotary body rotatably mounted onto the traveling body; a work machinery of an articulated type mounted to the rotary body and including a boom, an arm and a work tool; and a control device. The control device comprises a control instruction calculation section, a machine control section, an abnormality detection section, an avoiding movement necessity determination section and an avoidance control instruction section. The machine control section controls the traveling body, the rotary body and the work machinery putting priority on the avoidance control instruction over the operation control instruction.
A malfunction prediction system 1 includes: an operation data acquisition section 201 that acquires operation data of a hydraulic excavator 10; an inspection data acquisition section 202 that acquires inspection data of the hydraulic excavator 10; a part replacement/repair data acquisition section 203 that acquires part replacement/repair data of the hydraulic excavator 10; and a malfunction prediction section 205 that predicts a malfunction probability of each part of the hydraulic excavator 10, based on the operation data acquired by the operation data acquisition section 201, the inspection data acquired by the inspection data acquisition section 202, and the part replacement/repair data acquired by the part replacement/repair data acquisition section 203.
The present disclosure provides a construction management system capable of ascertaining information about a construction site more accurately than before. A construction management system 100 comprises: a position sensor 16a detecting position information about a transport vehicle 10 that transports payload; a position sensor 26 detecting position information about a loading machine 20 that loads payload onto the transport vehicle 10; a weight detection device 120 detecting weight information about the payload held by the loading machine 20; and an information management controller 130 which, based on chronological information of the position information about the transport vehicle 10, chronological information of the position information about the loading machine, and chronological information of the weight information, calculates the load weight of the payload loaded onto the transport vehicle 10.
G16Y 20/10 - Information sensed or collected by the things relating to the environment, e.g. temperatureInformation sensed or collected by the things relating to location
Provided is construction equipment that comprises a display device that is provided in an operator cab, an on-board operation device that is operated by an operator that has boarded the operator cab and outputs a manned operation signal, a communication device that receives an unmanned operation signal from outside a vehicle body, an operating mode switch that selects either a manned operating mode in which the manned operation signal is valid or an unmanned operating mode in which the unmanned operation signal is valid, and a controller that controls the vehicle body on the basis of the manned operation signal or the unmanned operation signal according to the operating mode. When the unmanned operating mode has been selected, the controller controls the vehicle body on the basis of the unmanned operation signal and outputs a caution display that urges caution that the unmanned operating mode has been selected to the display device. When the manned operating mode has been selected, the controller controls the vehicle body on the basis of the manned operation signal and does not display the caution display. The present invention can thereby notify a rider of construction equipment that is in a state in which unmanned operation is enabled that the construction equipment is in a state in which unmanned operation is enabled.
A work machine includes: a work device including a plurality of hydraulic actuators and a plurality of driving target members; a posture sensor that senses posture information of the work device; a control valve unit that controls flows of hydraulic operating fluid supplied from the hydraulic pump to the plurality of hydraulic actuators; a plurality of solenoid valves that generate pilot pressure for driving the control valve unit; and a controller that computes a command value of the pilot pressure to be generated by the solenoid valves, and outputs a control signal corresponding to the command value to the solenoid valves. The controller computes a gravitational direction component of an action direction vector of the driving target members on the basis of the posture information sensed by the posture sensor, corrects the command value of the pilot pressure on the basis of the gravitational direction component of the action direction vector when the command value exceeds a predetermined pressure, and outputs the control signal corresponding to the command value after the correction to the solenoid valves.
E02F 3/32 - DredgersSoil-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
F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
A liquid level detecting device (21) is provided with a venting cylinder (27) provided penetrating through a side surface portion (22A) of a case (22) in a position further toward an upper side (other side) of the case (22) than a water flow-through hole (25) and an ultrasonic sensor (23). In addition, an external venting hole (28) that opens outside the case (22) and an internal venting hole (29) that opens inside the case (22) on the upper side (other side) of the case (22) and that communicates with the external venting hole (28) are formed in the venting cylinder (27).
The purpose of the present invention is to provide a lifetime prediction system capable of performing highly reliable lifetime prediction even when the record of events that have occurred in a product is inaccurate. A lifetime prediction system 1 comprises a server device 5 that predicts the lifetime of a product, which is a piece of equipment such as a work machine 2, or an equipment component. The server device 5 includes: an operation information database 52 that stores operation information of each of a plurality of products; a history information database 53 that stores history information indicating a history of event data that is a record of events that have occurred in each of the plurality of products; and a computing process device 54 that predicts product lifetime. The computing process device 54 calculates, on the basis of the operation information and the history information, an event data acquisition rate indicating the percentage of products among the plurality of products that have event data in which the occurrence of events is accurately recorded, and predicts a corrected product lifetime on the basis of the calculated event data acquisition rate.
G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
G06Q 10/20 - Administration of product repair or maintenance
