Abstract: A loading machine includes a swing body, work equipment provided on the swing body, a posture measuring device to measure a posture of the swing body, and a depth detecting sensor to detect a depth of at least part of a surrounding of the swing body in a detection range. A control device controls the loading machine. The control device includes a posture information acquisition unit that acquires posture information indicating the posture measured, a detection information acquisition unit that acquires depth information indicating the depth detected, a target azimuth direction determination unit, and an output unit. The target azimuth direction determination unit determines a target azimuth direction in swing control based on the posture information and the depth information acquired when the swing body is stopped swinging. The output unit outputs a swing operation signal based on the target azimuth direction.

Abstract: 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.

Abstract: An electric cylinder includes a shaft, a bearing that is provided in an outer circumference of the shaft, and a holder that surrounds the shaft with the bearing therebetween. The holder includes a holder main body opening in an axial direction of the shaft and supporting the shaft with the bearing therebetween, and a trunnion portion having a cylindrical shape protruding outward in a manner of intersecting the axial direction from the holder main body. The holder is constituted so as to allow a lubricant to circulate therein from a side outward in the axial direction of the holder main body toward an inner circumference of the trunnion portion.

Abstract: A control device is a control device of an engine system including an engine, an oxidation catalyst provided in an exhaust passage of the engine, and a filter configured to collect soot within the exhaust passage, the soot being contained in exhaust gas of the engine, the control device including: an ash accumulation amount estimation unit configured to estimate an ash amount accumulated in the filter; and a regeneration control unit configured to control regeneration of the filter when the ash amount is equal to or less than a predetermined threshold value so that a predetermined amount of the soot remains in the filter, and control regeneration of the filter when the ash amount is greater than the threshold value so that the remaining amount of the soot in the filter is less than the predetermined amount.

Abstract: A motor includes a stator core, a plurality of slots disposed in a circumferential direction of the stator core, a coil disposed in the slots, a connecting wire connecting a plurality of coils, and an insulating paper configured to insulate a coil end portion of the coil from the connecting wire at the coil end portion. The connecting wire is formed with a larger surface area at a portion located on the insulating paper than other portions.

Abstract: 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.

Abstract: A work machine includes a vehicle body, a traveling wheel supported by the vehicle body, an actuator to change a steering angle of the traveling wheel from a neutral angle to left or right, a first steering member, and a controller. The first steering member is operable between a left steering range, a right steering range, and a neutral range. The controller controls the actuator so that the steering angle of the traveling wheel is changed to the left and right at speeds that correspond to operating amounts of the first steering member when the first steering member is positioned in the left and right steering ranges, respectively. The controller controls the actuator so that the steering angle returns to the neutral angle when the first steering member is positioned in the neutral range.

Abstract: A reducing agent supply device includes a tank configured to store a reducing agent to be supplied into an exhaust pipe of an engine, pressure-feeding means configured to pressure-feed the reducing agent in the tank, a reducing agent supply channel through which the pressure-fed reducing agent is supplied, an injection nozzle configured to inject, into the exhaust pipe, the reducing agent supplied through the reducing agent supply channel, retraction means configured to retract the reducing agent in the reducing agent supply channel back to a tank side, and a control device configured to control operation of the pressure-feeding means, the injection nozzle, and the retraction means, and the control device causes the injection nozzle to repeat a switching operation in a predetermined cycle while the retraction means is being operated.

Abstract: An activation system of a work machine includes a vehicle body control unit outputting a control signal to drive a vehicle body of the work machine with power supplied by a power source, and an authentication unit performing authentication of an operator of the work machine. The activation system of a work machine first activates the authentication unit, and activates the vehicle body control unit when the authentication unit authenticates that the operator boarding the work machine is a specific operator.

Abstract: A monitoring system of a work machine includes: a measurement data acquisition unit mounted on a work machine and configured to acquire measurement data of a measurement device that measures a target; a vehicle body data acquisition unit configured to acquire vehicle body data indicating a state of the work machine; a state determination unit configured to determine the state of the work machine based on the vehicle body data; an algorithm selection unit configured to select a specific algorithm for processing the measurement data based on the state of the work machine determined by the state determination unit; and a processing unit configured to process the measurement data and recognize the target based on the specific algorithm selected by the algorithm selection unit.

Abstract: A haul vehicle includes a dump body, a vehicle body supporting the dump body, a traveling apparatus including driving wheels and supporting the vehicle body, a trolley power receiving apparatus to which power is supplied from a trolley wire, a fuel cell that generates power through electrochemical reaction between hydrogen and oxygen, and an electric motor that generates driving force for rotating the driving wheels on a basis of power from at least one of the trolley wire or the fuel cell.

Abstract: A hydraulic valve apparatus interposed between a hydraulic device and a hydraulic pump and controls supply of oil from the hydraulic pump to the hydraulic device by operating a spool provided in a valve body, in which the valve body includes two pump oil passages connected to separate hydraulic pumps via pump ports, and a plurality of linear motion spools separately provided corresponding to a plurality of linear motion hydraulic devices, the two pump oil passages are provided in the valve body to be arranged side by side along a same direction, the plurality of linear motion spools are connected to a portion located on one side of the pump port in the pump oil passages, and the two pump oil passages are connected to each other via a merging-separating oil passage including a merging-separating switching valve at an end portion located on one side of the pump port.

Abstract: A work machine includes a slewing bearing, a drive device that drives the slewing bearing, a detector that detects a state of at least one of input to the drive device and output from the drive device, and a determiner that determines a state of the slewing bearing based on a detection value detected by the detector.

Abstract: A current topography data creation system for a work site includes: a current topography data reception unit that receives first current topography data of a work site detected by a three-dimensional sensor included in each of a plurality of work machines; an attribute data reception unit that receives attribute data given to the first current topography data; a current topography data creation unit that creates second current topography data of the work site based on the first current topography data; a priority storage unit that stores priority related to attribute data given to the second current topography data; and an attribute data update unit that, in a case where a plurality of pieces of attribute data of a certain point of the first current topography data is received within a predetermined time, gives attribute data to the point of the second current topography data based on the priority.

Abstract: A work machine includes: a first travel operation valve 13; a second travel operation valve 14; a work equipment operation valve 15; a first pressure compensation valve of the first travel operation valve 13; a second pressure compensation valve of the second travel operation valve 14; a bypass flow path; a travel communication valve 26; a temperature sensor 27; and a control device 6 configured to adjust a stroke of the travel communication valve 26 based on detection data from the temperature sensor 27 in a state in which each of the first travel operation valve 13 and the second travel operation valve 14 is disposed at a neutral position.

Abstract: The height of a heap of material formed by a stacking work is appropriately determined. A work machine main body includes a travel body. A work implement is attached to the work machine main body and includes a bucket. A controller commands operation of the travel body and the work implement. The controller determines a stacking height (H1) that is a height of a heap of material formed by the material in the bucket being discharged onto a ground in a state where the travel body is grounded to the ground from a mechanical dimension including a dimension of the work machine main body and a dimension of the work implement.

Abstract: A display system includes a display and a controller. The controller acquires machine position data indicative of a position of a work machine. The controller acquires a separation distance in a width direction of the revolving body between a work point of the work implement and a revolving axis. The work point is spaced from the revolving axis in the width direction. The controller acquires target position data indicative of a target position of the work implement. The controller causes the display to display a guideline indicative of the target position and a guide image indicative of the position of the work machine based on the machine position data and the target position data. The guide image includes a first image and a second image. The first image indicates a position of the revolving axis. The second image indicates a position away from the revolving axis by the separation distance.

Abstract: 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.

Abstract: A work machine includes a vehicle body, a support member, a blade, a rotation angle sensor, an object sensor, and a controller. The support member is connected to the vehicle body. The blade is rotatably supported by the support member. The rotation angle sensor detects a rotation angle of the blade. The object sensor detects an object around the work machine and outputs a signal indicating a presence or absence of the object. The controller is configured to set a detection range around the work machine. The controller is configured to determine the presence or absence of the object within the detection range based on the signal from the object sensor. The controller is configured to set the detection range according to the rotation angle of the blade.

Abstract: A hydraulic valve includes: a valve main body having a first port and a second port; and a spool movable along an axial center with respect to the valve main body. Further, the spool is provided with a main passage portion, a first passage portion, and a second passage portion, an opening area of the first passage portion with respect to the first port is changed, and flow rate control of oil from the first port to the second port through the main passage portion is performed, a plurality of the first passage portions is provided in the spool in, and the main passage portion of the spool has a first region, a second region, and a third region, an inner diameter of the first region being formed larger than that of the second region, and the third region being formed in a tapered shape.