A hydraulic system of an excavator includes a work state determination unit and a valve control unit. When it is determined that a work state of working equipment is a heavy excavation state, the valve control unit controls a first boom operation valve, a first arm operation valve, a first bucket operation valve, a second boom operation valve, a second arm operation valve, and a second bucket operation valve such that passing of hydraulic oil from a first hydraulic pump to a boom cylinder is restricted, hydraulic oil is supplied from a second hydraulic pump to a boom cylinder, hydraulic oil is supplied from both the first hydraulic pump and the second hydraulic pump to an arm cylinder, and hydraulic oil is supplied from one or both of the first hydraulic pump and the second hydraulic pump to a bucket cylinder.
An environment-friendly work machine is provided. A work implement includes a boom supported by a vehicular body frame, an arm coupled to the boom, and an attachment coupled to the arm. A boom foot pin rotatably couples the boom to the vehicular body frame. An arm motor is supported by the vehicular body frame. The arm motor generates drive force that moves the arm relatively to the boom. A motive power transmission apparatus mechanically transmits drive force generated by the arm motor to the arm. An arm gear member and a pivot member carry out rotational motion relative to the vehicular body frame as being concentric with the boom foot pin. An arm link transmits motive power to the arm as a result of the relative rotational motion.
An actuator drives a hydraulic excavator. A switch apparatus makes a switch between a supply state in which the actuator can be driven and a shut-off state in which the actuator cannot be driven. A display apparatus is capable of switching between displaying a third screen (setting screen) for setting an operational property of the actuator and displaying an information display screen different from the third screen, in the shut-off state. A controller performs control to cause the display apparatus to continue displaying the third screen in both the shut-off state and the supply state, when the switch apparatus switches the shut-off state to the supply state.
An unmanned vehicle management system includes: an inter-vehicle distance determination unit that determines an inter-vehicle distance between a sprinkling vehicle and an unmanned vehicle traveling behind the sprinkling vehicle in a same direction as that of the sprinkling vehicle based on a sprinkling state from a sprinkling spray provided in the sprinkling vehicle traveling in a work site; and an output unit that outputs, to the unmanned vehicle, inter-vehicle distance data indicating the inter-vehicle distance determined by the inter-vehicle distance determination unit.
The control device is a control device that controls a drawbar attached to a main frame of a grader, in which a movement of the drawbar is generated by at least three actuators, and the control device controls, based on an output signal from one operation lever having at least three degrees of freedom, the plurality of actuators such that a movement of the one operation lever corresponds to the movement of the drawbar.
A sprinkling vehicle control system includes a travel control unit that switches a traveling direction of a sprinkling vehicle, and a sprinkling control unit that controls a first sprinkling spray provided at a first portion on one side in the traveling direction in the sprinkling vehicle. The sprinkling control unit controls the first sprinkling spray such that a sprinkling condition of the first sprinkling spray when the sprinkling vehicle travels to one side in the traveling direction is different from a sprinkling condition of the first sprinkling spray when the sprinkling vehicle travels to the other side in the traveling direction.
E01H 3/02 - Mobile apparatus, e.g. watering-vehicles
B05B 12/08 - Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material discharged, of ambient medium or of target
B05B 13/00 - Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups
7.
WORK MACHINE CONTROL SYSTEM AND WORK MACHINE CONTROL METHOD
A control system of a work machine includes: a three-dimensional measurement device 20 that measures a work target of a work machine 1; a detection device 25 that detects the work target; and a working equipment control unit 87 functioning as an intervention control unit that performs intervention control of the work machine 1 when both the three-dimensional measurement device 20 and the detection device 25 have detected the work target.
An unmanned vehicle management system includes: a traffic congestion prediction unit that predicts occurrence of a traffic congestion from travel situations of a plurality of unmanned vehicles traveling on a travel path at a work site; and a guidance command unit that, when occurrence of a traffic congestion is predicted, outputs a first guidance command so that an unmanned vehicle that causes the traffic congestion enters a side path branching from the travel path.
B60W 50/00 - CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - Details of control systems for road vehicle drive control not related to the control of a particular sub-unit
9.
WORK MACHINE SURROUNDINGS MONITORING SYSTEM, WORK MACHINE, AND WORK MACHINE SURROUNDINGS MONITORING METHOD
A work machine surroundings monitoring system includes a first display image generation unit that generates a first display image indicating surroundings of a work machine on the basis of a camera image of a camera that captures an image of the surroundings of the work machine, a second display image generation unit that generates a second display image in a display mode different from that of the first display image on the basis of camera images of a plurality of cameras that capture images of the surroundings of the work machine, and a display control unit that generates a signal for displaying the first display image on a part of a display screen, displaying the second display image on a part of the display screen, and displaying a boundary image at a boundary between the first display image and the second display image on the display screen.
A work machine includes a vehicle body, a lift frame rotatably supported around a lift axis with respect to the vehicle body, a blade rotatably supported around a pitch axis with respect to the lift frame, a lift actuator connected to the lift frame and the vehicle body, a pitch actuator connected to the blade and the lift frame, a sensor that detects a height of the blade from a reference height determined based on the vehicle body, and a controller that controls the pitch actuator to change a pitch angle of the blade according to the height of the blade. The lift actuator causes the lift frame to perform a lift motion up and down around the lift axis. The pitch actuator causes the blade to perform a pitching motion around the pitch axis.
A work machine includes a vehicle body including a travel device, a blade supported so as to be rotatable about a pitch axis with respect to the vehicle body, a pitch actuator configured to cause the blade to perform a pitch motion about the pitch axis, and a controller. The determines whether a slip occurs on the travel device during work with the blade, and causes the blade to perform the pitch motion in a backward tilt direction upon determining that the slip occurs.
A transmission system includes a transmission, first and second composite sensors, and a controller. The transmission has a clutch switchable between an engaged state and a disengaged state, a first shaft disposed on an input side of the clutch, and a second shaft disposed on an output side of the clutch. The first and second composite sensors detect rotation speeds and rotation phases of the first and second shafts, respectively. The controller acquires a load torque applied to the transmission. When the clutch is switched from the disengaged state to the engaged state, the controller derives a phase difference between the rotation phase of the first shaft detected by the first composite sensor and the rotation phase of the second shaft detected by the second composite sensor based on the time when the clutch has stopped slipping. The controller acquires the load torque based on the derived phase difference.
A turbo type pump configured to pressurize a fluid and supply the fluid to a downstream side of a fluid passage by rotation of an impeller provided in the fluid passage, includes: a reduced-diameter portion having a reduced inner diameter in a state of forming a reverse surface facing a downstream side, the reduced-diameter portion being provided at a portion located on an upstream side of the impeller in the fluid passage; and a reverse partition wall portion provided in the reverse surface and configured to restrict a flow of the fluid in a circumferential direction.
A control system for a work vehicle, which includes a vehicle body and work equipment that is changeable in height and pitch with respect to the vehicle body, includes a controller. The controller determines a switching point by referring to target displacement data indicating a target displacement of the height of the work equipment according to a movement amount of the work vehicle from a work start position. The controller determines whether or not the work vehicle has reached the switching point based on the movement amount of the work vehicle from the work start position. The controller outputs a command to change the pitch of the work equipment upon determining that the work vehicle has reached the switching point.
A system controls a plurality of work machines including a first work machine and a second work machine. The system includes a communication device configured to wirelessly communicate with the plurality of work machines, and a controller. The controller acquires area data indicative of a position of a work area. The controller determines a first work path to be dug by the first work machine, the first work path extending in a predetermined work direction in the work area. The controller determines a second work path to be dug by the second work machine, the second work path extending in the work direction in the work area and disposed at an interval from the first work path in a lateral direction intersecting the work direction. The controller determines a next first work path and a next second work path so that the interval is decreased.
A control system for a work machine includes a controller. The work machine includes work equipment, a traveling device, and a parking brake. The controller is configured to output a control command to control the parking brake based on at least an operation state of the work equipment.
An unmanned vehicle management system includes: a protection area setting unit that sets a protection area where entry of an unmanned vehicle traveling around a sprinkler vehicle is prohibited on the basis of a sprinkling state of a sprinkle spray provided in the sprinkler vehicle moving at a work site; and an output unit that outputs the protection area set by the protection area setting unit.
A bulldozer causes left and right steering clutches to engage and left and right steering brakes to release when an operating amount of a steering lever is greater than a first predetermined amount and less than a second predetermined amount, and drives a turning motor so that the rotation speed of an inside output shaft becomes lower than the rotation speed of an outside output shaft as the operating amount of the steering lever increases. A controller causes the engagement rate of an inside steering clutch to decrease and causes an inside steering brake to brake when the operating amount of the steering lever is equal to or greater than the second predetermined amount.
B62D 11/08 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
A display method includes: acquiring a visible light image of a first target captured by a visible light imaging device; acquiring an infrared image of a second target captured by an infrared imaging device; calculating a visible light distance from the visible light imaging device to the first target for each of first partitioned areas defined in the visible light image; calculating an infrared distance from the infrared imaging device to the second target for each of second partitioned areas defined in the infrared image to correspond to the first partitioned areas; determining whether a difference between the visible light distance and the infrared distance is larger than a threshold for one of the first partitioned areas and one of the second partitioned areas corresponding to each other; combining the second partitioned area in which the difference is larger than the threshold with the visible light image to be displayed.
H04N 23/11 - Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths for generating image signals from visible and infrared light wavelengths
G06T 5/50 - Image enhancement or restoration by the use of more than one image, e.g. averaging, subtraction
G06V 10/74 - Image or video pattern matching; Proximity measures in feature spaces
A controller provided in a bulldozer maintains the engagement of an inside steering clutch over a predetermined period beginning from a switching start point at which switching starts, when switching from a slow turn mode to a pivot turn mode, and when switching from the pivot turn mode to the slow turn mode, maintains the braking of an inside steering brake over a predetermined period beginning from a switching start point at which the switching starts.
B62D 11/08 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
B62D 11/00 - Steering non-deflectable wheels; Steering endless tracks or the like
B62D 11/12 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin- differential or epicyclic gears using separate change-speed gearings
A controller of a crawler type work machine controls left and right steering clutches, left and right steering brakes, and a turning motor to cause the crawler type work machine to turn in either a slow turning mode or a pivot turning mode. The controller executes a hydraulic fluid amount control to reduce a hydraulic fluid amount supplied from a hydraulic pressure supply unit to the turning motor and to increase the hydraulic fluid amount supplied from the hydraulic pressure supply unit from the hydraulic pressure supply unit to the work implement cylinder when the work implement cylinder is driven while the turning motor is being rotated.
B62D 11/18 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin- differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source the additional power supply being supplied hydraulically
B62D 11/08 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
This hydrocarbon deposition amount estimation device comprises a hydrocarbon deposition amount estimation unit that estimates the deposition amount of hydrocarbons deposited in an exhaust gas purification device of an internal combustion engine equipped with an oxidation catalyst on the basis of at least a first measured value corresponding to the intake air temperature of the internal combustion engine, a second measured value corresponding to the temperature of a cooling liquid of the internal combustion engine, and a third measured value corresponding to the exhaust gas flow rate of the internal combustion engine.
F01N 3/24 - 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 constructional aspects of converting apparatus
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01D 53/96 - Regeneration, reactivation or recycling of reactants
F01N 3/20 - 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 operation; Control specially adapted for catalytic conversion
23.
WORK MACHINE, CONTROLLER FOR WORK MACHINE, AND METHOD OF CONTROLLING WORK MACHINE
A work machine is provided that can achieve an automatic brake retention function without hindering work. The work machine includes a vehicular body that travels, a work implement supported on the vehicular body, an accelerator operation device operated to increase a traveling speed of the vehicular body, a brake operation device operated to decrease the traveling speed of the vehicular body, and a controller. The controller performs automatic brake retention control to retain a braking force to maintain a travel-stopped state of the vehicular body when the traveling speed of the vehicular body becomes less than or equal to a threshold by operation of the brake operation device, and release the retention of the braking force by operation of the accelerator operation device. The controller determines whether work is being performed by the work implement, and when work is being performed, disables the automatic brake retention control.
A work vehicle includes a power source, a travel device that includes a clutch capable of adjusting a degree of engagement between the power source and a transmission, and travels on a basis of power transmitted from the power source, working equipment, a drive device that operates the working equipment on a basis of power transmitted from the power source, and a control device that outputs a control command for controlling the degree of engagement of the clutch on a basis of a state of the working equipment.
A work machine capable of suppressing a piston of a hydraulic cylinder reaching a stroke end is provided. The work machine includes a vehicular body, a work implement supported on the vehicular body, a hydraulic cylinder that drives the work implement, an issuance apparatus that issues a warning, and a controller that controls the hydraulic cylinder and the issuance apparatus. The hydraulic cylinder includes a cylinder portion and a piston capable of carrying out reciprocating movement within the cylinder portion. The controller can control the issuance apparatus to issue a warning when the piston reaches a warning issuance position before the stroke end of the hydraulic cylinder, and can adjust timing of issuance of the warning.
A work machine includes: a work implement including a bucket; a bucket position obtaining unit that obtains a position of the bucket; a distance calculating unit that calculates a distance between the position of the bucket obtained by the bucket position obtaining unit and a design topography of an execution object; and a recording unit that records existing topography data corresponding to the position of the bucket, based on the distance calculated by the distance calculating unit.
A risk detection unit detects an occurrence risk of an incident related to a work machine. A time calculation unit measures a risk time from an occurrence time of the risk to an elimination time of the risk. An evaluation unit calculates a safety evaluation index on the basis of the risk time. An output unit outputs the safety evaluation index.
A system controls a work machine including a work implement. The system includes a sensor and a controller. The controller acquires current position data of the work machine, acquires actual topography data, acquire default target displacement data that defines a target displacement according to a movement amount of the work machine, acquires a work interval indicative of a distance between a previous start position of work by the work machine and a current start position behind the previous start position, generates modified data with the default target displacement data modified according to the work interval, refers to the modified data to determine the target displacement according to the movement amount of the work machine from the current start position, determines topography data with the actual topography data vertically displaced downward by the target displacement as a target profile, and moves the work implement according to the target profile.
A relative displacement specification unit specifies a relative displacement between a jig and a tool.A position determination unit determines whether the jig and the tool are respectively positioned at a jig calibration point and a tool calibration point. A displacement correction unit corrects the measurement values of the displacements of the jig and the tool. A contact determination unit determines whether the tool has come into contact with a workpiece based on a measurement value related to a deflection of the tool. A tool length correction unit corrects tool length data based on the relative displacement when the tool is determined to have come into contact with the workpiece. A control unit generates a control command for controlling the jig or tool based on the relative displacement, a shape of the workpiece, and tool length data indicating a length of the tool.
A control system for an autonomous travel vehicle includes: a work machine position acquisition unit that acquires a position of a work machine; an autonomous travel vehicle position acquisition unit that acquires a position of the autonomous travel vehicle; a human information acquisition unit that acquires human information indicating whether or not a person is present inside the autonomous travel vehicle; and a command generation unit that changes control of the autonomous travel vehicle based on the human information and a positional relationship between the work machine and the autonomous travel vehicle.
A work site management system includes: a traveling path generation unit that generates a traveling path; and a protection area setting unit that sets a protection area in which a target vehicle is to be present based on a position of a first unmanned vehicle traveling in a work site along the traveling path.
A work site management system includes: a traveling path generation unit that generates a traveling path; and a protection area setting unit that sets, for a target vehicle, a protection area in which entry of a second unmanned vehicle is prohibited based on a position of a first unmanned vehicle traveling in a work site along the traveling path.
A management system for an autonomous travel vehicle includes: a work machine position acquisition unit that acquires a position of a work machine operated by an operator and having a travel device; and a target position determination unit that determines a target position of the autonomous travel vehicle based on the position of the work machine.
A management system of a work site includes: a priority storage unit that stores priority related to traveling continuation of an unmanned vehicle traveling in the work site; an input signal acquisition unit that acquires an input signal related to traveling stop of the unmanned vehicle; a decision unit that decides the traveling continuation or the traveling stop for each of a plurality of the unmanned vehicles traveling in the work site based on the priority and the input signal; and an output unit that outputs a traveling stop command to the unmanned vehicle for which the traveling stop is decided.
A ripper point attachment structure in a ripper device includes a ripper shank including a main body portion and a nose portion, and a ripper point including an internal space. The nose portion includes a distal end portion, a proximal end portion contiguous with the main body portion, and a linking portion. An outer periphery of a cross section cutting the linking portion along a plane perpendicular to an axis extending in a lengthwise direction of the nose portion is formed in an octagonal shape. An outer periphery of a cross section cutting the proximal end portion along the plane is formed in a rectangular shape. An outer periphery of a cross section cutting the distal end portion along the plane is formed in a rectangular shape. An inner periphery forming the internal space is formed along an outer periphery forming the distal end, linking and proximal end portions.
With a ripper point attachment structure, a pin member is inserted into a first pin hole formed in a ripper shank and a second pin hole formed in a ripper point. A locking member is engaged with the pin member to prevent the pin member from coming loose. The ripper point includes an opening, an internal space and a guide groove. The opening is formed at a rear end. The internal space is formed from the opening toward a distal end surface. The guide groove is formed in a predetermined range from the rear end toward the distal end surface in a portion of an inner surface forming the internal space. A second pin hole of the ripper point is disposed on a bottom surface of the guide groove. The locking member is disposed in a space forming the guide groove.
An unmanned vehicle control system includes a travel control unit that outputs a start command for starting the unmanned vehicle, and a dump body control unit that outputs a dump command for causing a dump body of the unmanned vehicle to perform a dumping operation when it is determined that the unmanned vehicle does not start in spite of the start command.
B60P 1/04 - 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
G05D 1/02 - Control of position or course in two dimensions
38.
OBSTACLE REPORTING SYSTEM FOR WORK MACHINE, AND OBSTACLE REPORTING METHOD FOR WORK MACHINE
An obstacle determination unit determines whether an obstacle exists in a periphery of the work machine. A reporting unit performs reporting showing the obstacle when determination is made that the obstacle exists. An instruction input unit receives an operation instruction for the reporting. An output unit changes a display mode of the obstacle based on the operation instruction.
G06F 3/0488 - Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
39.
DATA TRANSMISSION SYSTEM, WORK MACHINE, AND DATA TRANSMISSION METHOD FOR WORK MACHINE
Provided is a data transmission system for a work machine, including: a processing definition receiving unit configured to receive processing definition information indicating contents of processing of data collected from the work machine; a processing unit configured to determine a data format to be processed, based on the received processing definition information, and process the data collected from the work machine based on the determined data format; and a transmission unit configured to transmit the processed data to an external device.
An unmanned vehicle control system includes a travel control unit that outputs a start command for starting the unmanned vehicle, and a management area setting unit that sets a management area where the unmanned vehicle is allowed to move when it is determined that the unmanned vehicle does not start in spite of the start command. The travel control unit outputs an escape command for causing the traveling device of the unmanned vehicle to perform an escape operation in a state where the unmanned vehicle is restricted from moving to the outside of the management area.
A stator capable of controlling an increase in a size of a motor is provided. The stator includes a stator core and coils. The stator core includes mounted teeth on which the coils are mounted and non-mounted teeth on which the coils are not mounted. Each of the coils includes a coil end portion that protrudes in an axial direction from the stator core, and a terminal portion connected to a connecting wire that connects the coils to each other. The terminal portion protrudes in a circumferential direction from the coil end portion in such a manner as to overlap with at least a part of the non-mounted teeth in the axial direction.
Provided is a data transmission system for a work machine, including: a customization definition receiving unit configured to receive customization definition information indicating the contents of processing on data collected from the work machine and a validity period of the processing, and a transmission unit configured to transmit to an external device, the data in accordance with the contents of the processing in the validity period indicated by the received customization definition information.
G07C 5/00 - Registering or indicating the working of vehicles
G07C 5/08 - Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle, or waiting time
A hydraulic excavator which is a work vehicle includes a traveling apparatus, a revolution frame mounted on the traveling apparatus and including a lower frame, and a first radar arranged on a side surface of the lower frame, the side surface of the lower frame extending in a fore/aft direction and being arranged on left and right, the first radar being provided at a position closer to a rear end portion of the lower frame.
A work machine comprises a body, a ripper apparatus that is disposed behind the body, and an imaging device that is mounted to the body and images the ripper apparatus. The ripper apparatus includes a shank, a ripping tip that is attached to an end of the shank, a beam that supports the shank, and a ripper arm that interconnects the body and the beam. The imaging device images the ripper apparatus sideways and captures an image in a range including at least a portion of the shank, at least a portion of the beam, and at least a portion of the ripper arm.
A valve plate of a hydraulic pump/motor, includes a high pressure-side port and a low pressure-side port, a first oil groove provided to be endless in an outer peripheral part of the high and low pressure-side ports, and a plurality of second oil grooves. Further, a plurality of pad oil grooves communicating with the first oil groove and opened toward the end face of the cylinder block is provided in an outer peripheral portion of the high pressure-side port, at least in a portion being on a downstream side of the relative rotation, in a pad region contacting the end face of the cylinder block, and the plurality of pad oil grooves is provided such that a proportion of an opening area to the end face of the cylinder block is larger on the downstream side than on an upstream side of the relative rotation.
F04B 1/2021 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block - Details or component parts characterised by the contact area between cylinder barrel and valve plate
46.
CONTROL SYSTEM OF LOADING MACHINE, LOADING MACHINE, AND CONTROL METHOD OF LOADING MACHINE
A control system of a loading machine, having working equipment including a bucket, includes a control device. The control device detects a first surface of an excavated object excavated by the bucket during excavation work, calculates an under-excavation load angle indicating an angle of the first surface with respect to the horizontal plane on the basis of detection data of the first surface, and estimates the weight of the excavated object on the basis of the under-excavation load angle.
A controller calculates a first bearing indicative of the bearing of a work machine based on first positional data and second positional data. The controller calculates the position of the work machine. The controller calculates a second bearing indicative of the bearing of the work machine based on a change in the position of the work machine in a predetermined zone when a determination condition, including a travel condition indicating that the work machine is traveling in a straight line, is satisfied within the predetermined zone. The controller calculates a correction value of the bearing of the work machine based on the difference between the first bearing and the second bearing in the predetermined zone. The controller corrects the first bearing based on the correction value.
A work machine includes a vehicle body, and a plurality of radar devices. The vehicle body includes a front frame and a rear frame, traveling wheels disposed on the front frame, and traveling wheels disposed the rear frame. The rear frame is relatively operably connected to the front frame by an articulated mechanism. The plurality of radar devices are positioned on right and left sides of a central axis that extends along a front-rear direction of the rear frame. The plurality of radar devices are installed at a rear part of the vehicle body. Each radar device of the plurality of radar devices includes a detector configured to detect an object, and the detector is installed facing outward from a direction parallel to the central axis.
G01S 13/931 - Radar or analogous systems, specially adapted for specific applications for anti-collision purposes of land vehicles
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
A captured image acquisition unit acquires a captured image showing work equipment from a camera provided at a work machine. A blade edge shadow generation unit generates a blade edge shadow obtained by projecting a blade edge of the work equipment on a projection surface toward a vertical direction. A display image generation unit generates a display image obtained by superimposing the captured image, the blade edge shadow, a left line, and a right line. The left line passes through a left end of the blade edge shadow and extends in a front-and-rear direction of the work equipment along the projection surface. The right line passes through a right end of the blade edge shadow and extends in the front-and-rear direction of the work equipment along the projection surface. A display control unit outputs a display signal for displaying the display image.
A first assessment is made as to whether conveying of earth and sand to a first unloading position by a conveyance vehicle has been completed. The conveyance vehicle is controlled to exit the first operating region when the conveying of the earth and sand to the first unloading position has been completed. A second assessment is made as to whether the conveyance vehicle has exited the first operating region. An entry of the conveyance vehicle into the first operating region is prohibited when the conveyance vehicle has exited the first operating region. An entry of a bulldozer into the first operating region is permitted after the entry of the conveyance vehicle into the first operating region has been prohibited.
A work machine includes a vehicle body, a rearward detecting section, and a control section. The vehicle body includes a traveling unit and a work implement disposed in front of the traveling unit. The rearward detecting section is configured to detect an object when traveling in reverse due to driving of the traveling unit. The control section is configured to decide to validate or invalidate a first control according to a detection of the object, a state of traveling in reverse, and a scooping work state by the work implement. The control section is configured to decide to validate the first control based on the scooping work state when the first control is invalidated.
A work machine including a vehicle body configured to travel, a fan, an obstacle detection device, and a controller. The fan is configured to exchange air between an inside and an outside of the vehicle body through an opening provided toward a rear of the vehicle body. The obstacle detection device is installed behind the fan. The obstacle detection device is configured to detect an obstacle in the rear of the vehicle body. The controller is configured to control intake and exhaust of the fan based on a state of the obstacle detection device.
A wheel loader has a vehicle body, lift cylinders, a hydraulic circuit, an accumulator, and a controller. The vehicle body has a work implement. The lift cylinders drive the work implement. The hydraulic circuit is connected to the lift cylinders. The accumulator is connected to the hydraulic circuit through an on/off valve. The controller switches the on/off valve to the open position when pitching is predicted to occur on the vehicle body.
A stator includes: a stator core having teeth and slots; and coils including outer coils arranged at a first distance from a center of the stator core and inner coils arranged at a second distance shorter than the first distance, wherein the slots include first slots that the outer coils are arranged and second slots that the inner coils are arranged, a depth of the first slots is deeper than that of the second slots, each of coil sets is formed of each of the inner coil and the outer coil arranged to overlap with a part of the inner coil, phases of the inner and outer coils are different in each of the coil sets, the coil sets include first, second, and third coil sets, and a combination of the phases of the inner and outer coils varies among the first, second and third coil sets.
A first process acquires a boundary position between a work area and a dumping area. A second process acquires a current position of a work machine. A third process controls the work machine so as to form a berm that acts as a wheel stop by raising a work implement from a position, the position being away from the boundary position toward the work area by a predetermined distance, when the work machine is traveling from the work area toward the dumping area.
A valve plate of a hydraulic motor includes first and second pressure ports, and first and second oil grooves, the first and second pressure ports being alternately communicated with a cylinder bore in a cylinder block by bidirectional relative rotation in a state of being in contact with an end face of the cylinder block. Further, pad oil grooves communicating with the first oil groove and opened toward the end face of the cylinder block are provided in outer peripheral portions of the first and second pressure ports in a pad region, and the plurality of pad oil grooves is provided such that a proportion of an opening area to the end face of the cylinder block is larger at two end portions close to the second oil grooves than at a central portion separated from the second oil grooves in a circumferential direction of relative rotation.
An obstacle determination unit determines whether or not an obstacle is within a detection range being a detection target of the obstacle. A notification unit gives notification indicating the obstacle when determined as the obstacle being present. An operation input unit receives an operation to the display unit for changing the detection range. A change unit changes the size of the detection range based on the operation.
A captured image acquisition unit acquires a captured image showing work equipment from a camera provided at a work machine. A blade edge shadow generation unit generates a blade edge shadow obtained by projecting a blade edge of the work equipment on a projection surface toward a vertical direction. A display image generation unit generates a display image obtained by superimposing the captured image, the blade edge shadow, and a reference range graphic obtained by projecting the reachable range of the blade edge on the projection surface toward the vertical direction. A display control unit outputs a display signal for displaying the display image.
A haul vehicle management system includes: a three-dimensional data acquisition unit that acquires three-dimensional data outside an outline of a traveling area where a haul vehicle can travel; and a course data generation unit that generates a traveling course of the haul vehicle on the basis of outer shape data of the haul vehicle and the three-dimensional data, the traveling course being set in the traveling area.
A wheel loader includes: a front frame; a bucket; a boom having a distal end connected to bucket, and a proximal end rotatably supported by front frame; a sensor configured to measure a distance between boom and a loading target; and a controller configured to control an action of wheel loader. The controller causes wheel loader to perform a predetermined action for collision avoidance on condition that a distance to be measured by sensor when wheel loader travels takes a value less than or equal to a threshold value.
B60Q 5/00 - Arrangement or adaptation of acoustic signal devices
B60Q 9/00 - Arrangement or adaptation of signal devices not provided for in one of main groups
E02F 3/34 - Dredgers; Soil-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
A bulldozer includes: a travel manipulation lever that receives a manipulation of an operator and outputs a travel command to allow a travel device to travel or to stop the travel device; a fuel adjustment dial that sets a rotation speed of an engine; a seating sensor that outputs a seating signal indicating a sensed result of whether or not the operator is seated in an operator seat; a monitor that performs notification to the operator; and a controller. When the travel command to allow the travel device to travel is issued from the travel manipulation lever, a set value of the rotation speed of the engine is lower than or equal to a predetermined value, and the operator is not seated in the operator seat, the controller causes the monitor to perform the notification.
A control system of an unmanned vehicle includes: a requested steering speed calculation unit that calculates a requested steering speed of the unmanned vehicle such that the unmanned vehicle travels along a traveling course; an actual steering speed acquisition unit that acquires an actual steering speed of the unmanned vehicle detected by a steering sensor; and a traveling control unit that adjusts a traveling speed of the unmanned vehicle based on a result of comparison between the requested steering speed and the actual steering speed.
A distance acquisition unit acquires first distance data that is distance data in an area in which a first reference object installed at an arbitrary position outside a work machine is present. The distance data measured by an in-vehicle distance sensor. A position calculation unit calculates a position of the first reference object in a predetermined coordinate system based on the first distance data. A relationship acquisition unit acquires a positional relationship between the first reference object, and a second reference object of which a position in the coordinate system is known. A calibration unit calibrates, based on the first distance data and the positional relationship, a parameter to be used to measure a position in the coordinate system from the distance data of the in-vehicle distance sensor.
A guide device includes a support that includes a guide surface, and a movable body that includes an oil pocket to which lubricant is supplied and a sliding surface facing the guide surface. The sliding surface includes a first region that is arranged around the oil pocket and formed of a first material, and a second region that is arranged at least partially around the first region and formed of a second material.
F16C 32/06 - Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
B23Q 1/42 - Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using T-, V-, dovetail-section or like guides
B23Q 11/12 - Arrangements for cooling or lubricating parts of the machine
65.
EXCAVATION PLAN CREATION DEVICE, WORKING MACHINE, AND EXCAVATION PLAN CREATION METHOD
An excavation plan creation device includes a storage unit configured to store a plurality of planning models each of which is a machine learning model that receives, as an input, terrain information and that outputs a planned value of an excavation trajectory and a swing direction. The planning models have performed machine learning with parameters related to soil quality which are different from each other. A soil quality estimation unit is configured to estimate soil quality. A terrain information acquisition unit is configured to acquire terrain information. A planned value calculation unit is configured to select the planning model on the basis of the soil quality estimated by the soil quality estimation unit, input the terrain information acquired by the terrain information acquisition unit to the selected planning model, and calculate the planned value as an output of the planning model.
An excavation information processing device includes an acquisition unit configured to acquire target object position information indicating an excavation target object by position information of a plurality of points, and an excavation earth amount estimation unit configured to sequentially estimate and output an excavation earth amount acquired by a bucket when the bucket performs holding at that point in time based on bucket position and posture information indicating a position and a posture of the bucket and the target object position information.
E02F 3/32 - Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
67.
UNMANNED VEHICLE CONTROL SYSTEM, UNMANNED VEHICLE, AND UNMANNED VEHICLE CONTROL METHOD
An unmanned vehicle control method for setting a permitted area where traveling is permitted for each unmanned vehicle, the unmanned vehicle control method includes: acquiring unmanned vehicle data including position data of the unmanned vehicle; acquiring road surface condition data of a travel path on which the unmanned vehicle travels; and generating data including a permitted area in the travel path of the unmanned vehicle, a stop point in the permitted area, and a target traveling speed for the unmanned vehicle to stop at the stop point on a basis of the unmanned vehicle data that has been acquired, wherein the permitted area is set on a basis of the road surface condition data of a predetermined area including the stop point.
A controller acquires current position data indicative of a current position of a work machine. The controller acquires an inclination angle of an actual topography to be dug. The controller acquires a maximum climbing angle when the work machine travels in reverse. The controller determines a digging angle with respect to the actual topography based on the inclination angle and the maximum climbing angle. The controller determines a target digging trajectory based on the digging angle. The controller controls a work implement according to the target digging trajectory.
A first payload computation value which represents a weight of loads loaded on the work implement in a first attitude is obtained. The first attitude and a second attitude are equal to each other in ratio between a horizontal distance from a position of a center of gravity of a first link member to a base end of the first link member and a horizontal distance from a position of the center of gravity of the loads loaded on the work implement to the base end. A second payload computation value which represents a weight of loads loaded on the work implement in the second attitude is obtained. When the first payload computation value and the second payload computation value are determined as being different from each other, a weight of a second link member is changed and processing above is repeated.
A tunnel excavation device includes a first body portion and an erector device. The first body portion includes a cutter head and a support portion rotatably supporting the cutter head. The erector device is configured to transport a supporting member toward an excavated wall surface. The erector device is provided on the support portion. The erector device includes a ring portion holding the supporting member, and a posture changing device configured to change an angle formed by a center axis of the ring portion and a rotation axis of the cutter head in a plan view.
E21D 9/11 - Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
71.
UNMANNED VEHICLE CONTROL SYSTEM, UNMANNED VEHICLE, AND UNMANNED VEHICLE CONTROL METHOD
An unmanned vehicle control system 1 includes: a traveling condition data generation unit 322 that generates traveling condition data including a travel course of an unmanned vehicle and a traveling speed of the unmanned vehicle; and a travel control unit 124 that controls the unmanned vehicle on a basis of the traveling condition data generated by the traveling condition data generation unit 322, in which the traveling condition data generation unit 322 changes a speed limit of the traveling speed of the unmanned vehicle on the basis of information indicating a safety level when the unmanned vehicle travels on a side of a manned vehicle.
A first work machine includes a work implement. A method of controlling the first work machine includes acquiring a traveling state of the first work machine that is performing work with the work implement while traveling on a first work path, determining whether the first work machine is deviating from the first work path based on the traveling state, and stopping travel of the first work machine upon determining that the first work machine is deviating from the first work path.
Detection accuracy of a device for obtaining a position of a blade is improved. A motor grader includes an antenna for reception of a satellite position determination signal arranged in a roof portion of a cab, a first IMU mounted on the cab, a second IMU mounted on a draw bar, a rotation angle sensor that detects an angle of rotation of a swing circle with respect to the draw bar, an inclination angle sensor that detects an angle of inclination of a blade with respect to the swing circle, and a controller. The controller obtains the position of the blade in a global coordinate system based on the satellite position determination signal received by the antenna and results of detection by the first IMU, the second IMU, the rotation angle sensor, and the inclination angle sensor.
Information on a work machine is more accurately obtained through simplified works. An information obtaining system includes a hydraulic excavator, a target portion, a position measurement unit, and an information obtaining unit. The hydraulic excavator includes a revolving unit and a work implement movable relatively to the revolving unit. The target portion is attached to the work implement. The position measurement unit continuously measures positions of the target portion that moves with movement of the work implement relative to the revolving unit. The information obtaining unit obtains three-dimensional information on the hydraulic excavator based on a track of the target portion obtained by measurement.
A tunnel excavation device includes a main body a frame and a workbench. The main body includes a front body section and a rear body section. The front body section includes a cutter head provided with a plurality of disk cutters. The rear body section is disposed behind the front body section and includes a gripper section for obtaining a reaction force when excavating. The frame is disposed continuously behind the main body. The workbench is disposed above the frame so as to be rotatable with respect to the frame.
E21D 9/11 - Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
E21D 11/40 - Devices or apparatus specially adapted for handling or placing units of linings for tunnels or galleries
E21D 9/10 - Making by using boring or cutting machines
A bulldozer has a left planetary gear mechanism, a left steering clutch, and a first clutch gear. The left planetary gear mechanism is disposed between an input shaft and a left output shaft. The left steering clutch switches between transmitting and blocking a rotational force from the input shaft to the left output shaft by the left planetary gear mechanism. The first clutch gear is attached to the left steering clutch. The left steering clutch can is configured to be engaged or disengaged with a left sun gear. The first clutch gear is fixed in an unrotatable manner.
B62D 11/08 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
B62D 11/10 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin- differential or epicyclic gears
F16H 1/28 - Toothed gearings for conveying rotary motion with gears having orbital motion
B60K 17/16 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
E02F 3/76 - Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling devices
A stage specifying unit specifies a work stage of a work machine. A target decision unit decides target postures of a boom and an arm based on the specified work stage. A control amount calculation unit calculates a control amount of the boom and the arm based on the target postures. A limiting unit limits the control amount of the arm such that a change amount of the control amount of the arm is within a predetermined change amount when the specified work stage is a work stage related to a hoist swing.
A system includes a plurality of work machines, a communication device, an operating device, and a controller. The plurality of work machines are able to operate automatically. The plurality of work machines include a first work machine and a second work machine. The communication device communicates wirelessly with the plurality of work machines. The operating device transmits an operation signal to the plurality of work machines via the communication device. The operating device is able to operate the plurality of work machines remotely and individually. The controller disables the operation of the operating device on the first work machine when the first work machine and the second work machine are operating automatically.
A control method for a tunnel excavation device is provided. While grippers of a rear body section protrude outward and the rear body section is secured to an inner wall of a tunnel, a plurality of thrust cylinders are controlled so that a front body section is made to move forward along a movement prediction line set based on a tunnel excavation plan line . While grippers of the front body section protrude outward and the front body section is secured to the inner wall of the tunnel, the plurality of thrust cylinders are controlled so that the rear body section is made to move forward along a movement prediction line set based on an actual result line .
E21D 9/10 - Making by using boring or cutting machines
E21D 9/11 - Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
A wear resistant component includes a matrix portion made of metal, and a core that is embedded in the matrix portion and is higher in hardness than the matrix portion. The core has a shape that follows a shape of at least a portion of a surface of the matrix portion.
A work machine remote control system includes a sensor data reception unit that receives detection data of an attitude of working equipment included in a work machine operated by an operation signal from a remote place, an alarm control unit that outputs an alarm control signal when it is determined, based on the detection data, that the working equipment is approaching or has reached an end position in a movable range, and an alarm device that is provided in the remote place and outputs an alarm based on the alarm control signal from the alarm control unit.
A control system of an unmanned vehicle includes a traveling control unit that outputs a first command for starting the unmanned vehicle. When the unmanned vehicle is determined not to be started by a first command, a traveling control unit outputs a second command that causes the unmanned vehicle to generate assist driving force.
A display system includes a display and a controller. The controller causes the display to display a third figure representing a relative relationship between a first figure indicating a direction of a working implement of a working machine and a second figure indicating a direction of a target topography from the working machine.
A controller acquires a target soil amount in one work path with respect to an actual topography. The controller determines a target profile in the one work path based on the target soil amount. The controller performs work in the one work path by operating a work implement according to the target profile. The controller acquires a maximum traction force of the work machine during the one work path. The controller determines whether the maximum traction force is smaller than a reference traction force. The controller increases the target soil amount in a next work path when the maximum traction force is smaller than the reference traction force. The controller determines the target profile in the next work path based on the increased target soil amount.
A management system includes a position detection unit which obtains a position of a work machine, a posture detection unit which obtains a posture of the work machine, an object detection unit which obtains a three-dimensional shape of a buried object, a position calculation unit which obtains a position of the buried object by using the position of the work machine obtained by the position detection unit, the posture of the work machine obtained by the posture detection unit, and the three-dimensional shape of the buried object obtained by the object detection unit, and an information acquisition unit which acquires buried object information including at least the position of the buried object obtained by the position calculation unit.
F17C 1/00 - Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
F17C 5/06 - Methods or apparatus for filling pressure vessels with liquefied, solidified, or compressed gases for filling with compressed gases
F17D 1/08 - Pipe-line systems for liquids or viscous products
G01B 11/245 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using a plurality of fixed, simultaneously operating transducers
H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
E02F 3/32 - Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
G01S 19/47 - Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement the supplementary measurement being an inertial measurement, e.g. tightly coupled inertial
86.
WORK MACHINE AND METHOD FOR CONTROLLING WORK MACHINE
A second frame is turnably connected to a first frame. A steering cylinder is connected to the second frame and the first frame. The steering cylinder causes the second frame to turn with respect to the first frame. A hydraulic pump supplies hydraulic fluid to the steering cylinder. An engine drives the hydraulic pump. A steering operating member is operable by an operator. A steering operation sensor outputs a steering command signal corresponding to an operation of the steering operating member. A controller controls a flow rate of the hydraulic fluid supplied from the hydraulic pump to the steering cylinder by controlling a rotation speed of the engine in accordance with the steering command signal.
In a construction method using an excavator that is controlled by manual operation, and an excavator that includes an automatic working-equipment control unit automatically controlling second working equipment on the basis of at least one of a current terrain and a designed terrain of a construction range in a construction site, and a tooth-edge position of the second working equipment, a progress rate that indicates a volume of soil having been excavated by the excavator to a target volume of soil to be excavated by the excavator in the construction range is calculated, and when the progress rate is equal to or larger than a threshold, the excavator stops construction of the construction range, and the excavator takes over the construction of the construction range, from the excavator.
A detection system includes an acquisition unit configured to acquire captured data from an imaging device that captures an image of a site, and a dangerous act determination unit configured to determine whether a person who performs a dangerous act is present at the site based on the captured data.
There is provided a positioning system for a work machine using RTK positioning that uses a satellite positioning system, the positioning system including: a sensor controller that is a calculation unit that calculates a position of an antenna, of the satellite positioning system, disposed in the work machine based on a position of working equipment, of the work machine, aligned with a known reference point PR positioned at a work site; and a monitor controller that is an initialization control unit that outputs a control command that causes a receiver, of the satellite positioning system, that performs positioning calculation by the RTK positioning to execute initialization processing of the positioning calculation in which an integer value bias of each satellite and the position of the antenna of the satellite positioning system are unknown, by using the calculated position of the antenna of the satellite positioning system.
A display system includes a display and a controller. The controller displays a third figure indicating a relative relationship between a first figure indicating an inclination of a bottom surface of a bucket and a second figure indicating an inclination of a target topography on the display.
A wheel loader includes a vehicle body frame, a transmission mechanism, a support section, a movable section, a joystick lever, and an urging mechanism. The transmission mechanism transmits a movement of the vehicle body frame. The support section is fixed with respect to the vehicle body frame. The movable section is connected to the transmission mechanism and is movably supported by the support section. The movement of the vehicle body frame is input to the movable section. The joystick lever accepts an operation to move with respect to the movable section by the operation. The urging mechanism adjusts a movement of the movable section with respect to the support section.
The bulldozer has a right first oil channel, a right second oil channel, and a right third oil channel. The right first oil channel guides a portion of the lubricating oil discharged by a hydraulic pump to a right steering brake. The right second first oil channel guides a portion of the lubricating oil discharged by the hydraulic pump to a right planetary gear mechanism. The right third oil channel guides at least a portion of the lubricating oil that has passed through the right planetary gear mechanism to a right steering brake. At least a portion of the planetary gear mechanism is disposed further inside than the right steering brake in a radial direction perpendicular to the center axis of an input shaft.
B62D 11/08 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
F16H 57/04 - Features relating to lubrication or cooling
A wheel loader includes a vehicle body, a work implement, a bucket-to-ground angle detection section, and a control section. The work implement operates with respect to the vehicle body and includes a bucket or a fork. The bucket-to-ground angle detection section detects information on a tilt angle of the bucket or the fork with respect to a gravity direction. The control section controls the tilt angle of the bucket or the fork with respect to the gravity direction based on a detection value of the bucket-to-ground angle detection section.
An obstacle determination unit determines whether an obstacle is present in a periphery of the work machine. An action detection unit detects an action of an operator of the work machine. An action determination unit determines whether the detected action is a confirmation action executed at the time of safety confirmation. A notification unit changes a mode of notification when the action is determined to be the confirmation action.
A crawler belt is wound around a sprocket and an idler and includes a plurality of track shoe plates. Each track shoe plate has an attachment surface and a ground engaging surface. The track shoe plate has projecting sections on the ground engaging surface. Side surfaces of the projecting sections are each inclined relative to a perpendicular line perpendicular to the attachment surface at an angle greater than a winding angle of the track shoe plate relative to either sprocket or idler.
A wear resistant component (1) includes a matrix portion (10) made of metal, and a framework portion (20) that is embedded in the matrix portion (10) and is higher in hardness than the matrix portion (10). The framework portion (20) has a three-dimensional lattice structure formed with a plurality of bar-shaped members 31, and has a shape that follows a shape of at least a portion of a surface (11-18, 10C) of the matrix portion (10).
A hydraulic system includes: an arm hydraulic cylinder; a first hydraulic pump and a second hydraulic pump; an arm first direction switching valve; an arm second direction switching valve; and a controller that controls an operation of the arm second direction switching valve when the arm hydraulic cylinder is extended and operated. Further, the arm first direction switching valve incorporates an arm regeneration passage capable of supplying oil when the arm hydraulic cylinder is extended and operated, and the controller monitors a pressure state of the arm hydraulic cylinder, and when determining that oil flow through the arm regeneration passage is possible, the controller blocks oil flow between the arm hydraulic cylinder and the arm second direction switching valve, and otherwise, the controller operates the arm second direction switching valve so that oil can be supplied from the second hydraulic pump to the bottom chamber.
F15B 11/024 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
A work machine periphery monitoring system includes: a camera 30 as a detection unit that detects a person in a periphery of a work machine; an alarm portion that outputs an alarm; a state determination unit 54 that determines a state of a body of the person detected by the camera 30; and an alarm control unit 56 that controls the output of the alarm by the alarm portion on the basis of a determination result of the state determination unit 54.
A target posture for a work implement at work is determined. There is provided a working system, comprising a body, a work implement attached to the body, and a computer. The computer has a trained target posture estimation model to determine a target posture for the work implement to assume at work. The computer obtains a target value for an amount of a work performed by the work implement, a period of time elapsing since the work implement started to work, and mechanical data for operation of the body and the work implement, uses the trained posture estimation model to estimate a target posture from the target value, the elapsed period of time and the mechanical data, and thus outputs the estimated target posture.
A management system for a transport vehicle includes a storage unit that stores a traveling path outline indicating an outline of a traveling path at a work site and an intersection outline indicating an outline of an intersection at the work site, a designation unit that designates a start point of traveling of the transport vehicle at the work site and an end point of traveling of the transport vehicle, and a connection unit that generates a traveling area outline by connecting the traveling path outline and the intersection outline on the basis of the start point and the end point designated by the designation unit.