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Komatsu Ltd patents


Recent patent applications related to Komatsu Ltd. Komatsu Ltd is listed as an Agent/Assignee. Note: Komatsu Ltd may have other listings under different names/spellings. We're not affiliated with Komatsu Ltd, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "K" | Komatsu Ltd-related inventors


Mining machine management system and management method

A mining machine management system includes a detection unit mounted on a mining machine that travels in a mine in which a plurality of landmarks is installed, and which detects a position of the landmark with respect to the mining machine in a non-contact manner, and a traveling control unit which corrects a current position of the mining machine based on a position of the landmark, the position having been obtained in advance, and the position of the landmark obtained by the detection unit and causes the mining machine to travel by dead reckoning navigation, and which does not use at least the position of the landmark detected by the detection unit in causing the mining machine to travel by the dead reckoning navigation, when a vehicle traveling in the mine exists around the position of the landmark detected by the detection unit.. . ... Komatsu Ltd

Work implement, arm, and work vehicle

An arm includes an arm main body, a protective member, a fixing component and a restrictor. The arm main body has a distal end part with first and second end components disposed a specific space apart along a width direction, a bucket attached to the arm main body, and a proximal end part configured to allow attachment on a vehicle main body side. ... Komatsu Ltd

Heater apparatus and work vehicle

A heater apparatus includes a housing which is arranged in a step positioned at an outer side of a floor plate of a vehicle body of a work vehicle in a vehicle width direction and has an air intake and a warm air blowoff port; an electric heater arranged in an inner space of the housing; a fan which supplies air to the electric heater; and a supporting member which supports the electric heater and the fan. The electric heater is arranged so that a rear end of the electric heater is arranged at a position lower than a front end of the electric heater.. ... Komatsu Ltd

Work vehicle and operator's compartment unit

An operator's compartment has an internal space. A case has an internal space in communication with the internal space of the operator's compartment. ... Komatsu Ltd

Calibration device of work machine, work machine, and calibration method of work machine

When correcting an error caused by deviation of an attitude detection device with respect to a work machine including a swing body which swings, a working implement being attached to the swing body, the attitude detection device outputting an attitude of the work machine, the error is corrected by using a first position which is a position of a part of the work machine when the work machine is in a first attitude and a second position which is a position of the part when the work machine is in a second attitude.. . ... Komatsu Ltd

Control system for wheel loader, control method thereof, and method of controlling wheel loader

A control system for a work vehicle includes a display and a control unit which has the display show a perspective image in which at least a part of a work implement of a wheel loader or a vessel of a loaded vehicle is seen through.. . ... Komatsu Ltd

Spool valve, operation device, and work vehicle

A spool valve includes: a valve body that has a spool hole; and a spool disposed in the spool hole and movable in an axial direction, wherein the spool has a first large-diameter portion, and a small-diameter portion provided on one side in the axial direction of the first large-diameter portion, the first large-diameter portion has a first outer surface slidable with an inner surface of the spool hole, an end surface connected to an end portion at the one side in the axial direction of the first outer surface and to an end portion at the other side in the axial direction of an outer surface of the small-diameter portion, and a cutout portion provided on the end surface, and a bottom surface of the cutout portion is inclined toward the one side in the axial direction to approach a central axis of the spool.. . ... Komatsu Ltd

Work vehicle

A work vehicle includes a hydraulic fluid tank having a breather valve, and a breather hose attached to the breather valve. The breather hose has a first flowpath joined to the breather valve and a second flowpath and a third flowpath branching off from the first flowpath. ... Komatsu Ltd

Work vehicle

A hydraulic excavator includes an engine hood covering an engine from above and a vent member disposed inside the engine hood. The engine hood includes a third side plate. ... Komatsu Ltd

Mechanical device, working vehicle, and deterioration state estimation system and deterioration state estimation method of machine component

A mechanical device includes a housing, a transparent spacer member, a magnet, and an image capturing device. The housing has an internal space in which a machine component immersed in oil is housed. ... Komatsu Ltd

Travel vehicle and method for controlling travel vehicle

A travel vehicle includes: a vehicle having a travel device and a vehicle body supported by the travel device; a steering device provided to the travel device; a steering angle detection device that detects detected steering angle data of the steering device; an attitude detection device that detects attitude data of the vehicle body; a travel speed detection device that detects travel speed data of the travel device; a turn data calculation unit that calculates turn data of the vehicle body based on the attitude data and the travel speed data; and a steering angle data correction unit that calculates first correction data on the detected steering angle data based on the detected steering angle data and the turn data.. . ... Komatsu Ltd

Power train and motor grader

A power train is provided having a reduced size and weight. A hydraulic motor includes a rotatable output shaft. ... Komatsu Ltd

Work equipment control device and work machine

A work equipment control device includes a work equipment state specifying unit, a control reference specifying unit, a distance specifying unit, and a bucket control unit. The work equipment state specifying unit specifies a state of work equipment. ... Komatsu Ltd

Wheel loader

A wheel loader includes a vehicular body, a work implement, a front wheel, and a control unit. The work implement is disposed in front of the vehicular body. ... Komatsu Ltd

05/17/18 / #20180137446

Construction management system and construction management method

A construction management system includes: a current topography data acquisition unit configured to acquire current topography data indicating a current topography of a construction site; a design topography data acquisition unit configured to acquire design topography data indicating a design topography of the construction site; a construction plan data calculation unit configured to calculate construction plan data including earth cutting plan data and earth banking plan data by collating the current topography data with the design topography data; and a construction plan data output unit configured to output the construction plan data to an output device. The construction plan data output unit causes an output device to output at least two of the design topography data, the cutting plan data, and the banking plan data in parallel.. ... Komatsu Ltd

05/17/18 / #20180135740

Lubricating apparatus

A lubricating apparatus includes a lubricating oil supplying member disposed to face a tip surface of an input shaft. An axial oil passage and a radial oil passage are formed inside the input shaft and allow an outer circumferential surface of the input shaft having outer spline teeth and the tip surface to communicate with each other. ... Komatsu Ltd

05/17/18 / #20180135277

Control system for work vehicle, control method thereof, and method of controlling work vehicle

A control system for a work vehicle includes a position determination unit which determines a position of loading on a loaded vehicle based on a state of loading on the loaded vehicle, a display, and a representation control unit which has the display show loading guidance corresponding to the position of loading determined by the position determination unit for a laterally viewed loaded vehicle.. . ... Komatsu Ltd

05/17/18 / #20180135273

Wheel loader

A wheel loader includes a work implement, an obtaining unit, and a control unit. The work implement includes a bucket. ... Komatsu Ltd

05/10/18 / #20180127036

Lug bar, track shoe, and method for producing lug bar

The lug bar includes a base, having a bar shape and made of a first metal, and an overlay, extending along the longitudinal direction of the base to cover a covered region as a part of the outer peripheral surface of the base. In an overlay edge portion corresponding to a boundary between the covered region and an exposed region other than the covered region of the surface of the base, the exposed region and the surface of the overlay are flush with each other to form a forged surface.. ... Komatsu Ltd

05/03/18 / #20180119384

Loader control system and loader control method

A loader control system includes: a boom position calculation unit configured to calculate a position of a boom rotatably supported by a vehicle body of a loader; a bucket attitude calculation unit configured to calculate an attitude of a bucket rotatably supported by the boom; a determination unit configured to determine whether the attitude satisfies a predetermined condition on the basis of the attitude and a reference attitude of the bucket in dumping movement; and a work machine control unit configured to cause the bucket to carry out the dumping movement, and output a control signal to cause the boom to carry out lifting movement when the attitude is determined to satisfy the predetermined condition.. . ... Komatsu Ltd

05/03/18 / #20180118261

Work vehicle

A bulldozer is provided with left and right steering brakes that brake the rotations of left and right drive wheels, and a control unit for hydraulically controlling the braking state of the respective left and right steering brakes. The control unit executes protection processing on the left steering brake or the right steering brake when a state of the degree of engagement of the left steering brake or the right steering brake being within a predetermined range and the vehicle speed being equal to or greater than a predetermined vehicle speed continues for a predetermined time.. ... Komatsu Ltd

04/19/18 / #20180106176

Exhaust gas aftertreatment unit and work vehicle

An exhaust gas aftertreatment unit includes a selective catalytic reduction device that treats engine exhaust gas, a connecting pipe that guides the engine exhaust gas to the reduction device, a reducing agent injection device disposed on the connecting pipe to inject a reducing agent into the exhaust gas, and a cooling water flowpath that guides cooling water to an internal flowpath of the injection device. The cooling water path includes a first flowpath joined with the internal flowpath, second and third flowpaths branching off from the first flowpath, and a branching point where the first flowpath branches into the second flowpath and the third flowpath is positioned higher than a connecting portion of the injection device and the first flowpath. ... Komatsu Ltd

04/19/18 / #20180105205

Work vehicle and method for controlling work vehicle

An articulated work vehicle with linked front and rear frames includes a joystick lever, a hydraulic actuator, a control valve, a force imparting component, a joystick displacement sensor, a steering angle sensor, and a controller. The joystick lever is operated to allow a target steering angle to be set. ... Komatsu Ltd

04/19/18 / #20180105203

Work vehicle and method for controlling work vehicle

An articulated work vehicle with linked front and rear frames includes a joystick lever, a force imparting component, and a controller. The joystick lever can be moved to an inside or an outside with respect to an operator's seat by being operated by an operator, to change a steering angle of the front frame with respect to the rear frame. ... Komatsu Ltd

04/19/18 / #20180105202

Work vehicle

A work vehicle is articulated with a front frame and a rear frame linked to the front frame. The work vehicle includes a hydraulic actuator, a control valve, an operation member and a force imparting component. ... Komatsu Ltd

04/12/18 / #20180100289

Work vehicle

An operator's compartment is located above a climbing device and has a door. A sensing unit recognizes an operator. ... Komatsu Ltd

04/05/18 / #20180094408

Display system of working machine and working machine

A display system of a working machine includes: a tilt sensor that detects a pitch angle and a roll angle of a working machine; a calculation unit that calculates a tilting position on polar coordinates that indicates a magnitude and a direction of tilt of the working machine based on the detected pitch angle and roll angle; a display unit that displays various kinds of information; a display processing unit that displays, on a predetermined region on a display screen of the display unit, a monitor-displayed level that performs a polar coordinate display of the tilting position and a marked line indicating a preset magnitude of tilt; and a setting processing unit that performs a setting to change display content of the monitor-displayed level.. . ... Komatsu Ltd

04/05/18 / #20180093614

Work vehicle

A climbing device body can assume by a rotation operation an erect, retracted position allowing a first end portion to be positioned above and a second end portion to be positioned below and a tilted, deployed position allowing the second end portion to be positioned sideways of the vehicular body outer than the first end portion. A handrail is engaged with the rotation operation to be capable of assuming a raised state allowing a gripping portion to assume a first position distant from the climbing device body in a deployed position and a folded state allowing the gripping portion to assume a second position close to the climbing device body in a retracted position.. ... Komatsu Ltd

03/29/18 / #20180087477

Egr apparatus and dump truck including the same

. . An egr apparatus configured to circulate exhaust gas discharged from an exhaust manifold of an engine to an intake manifold of the engine includes: an egr cooler disposed at a downstream side of the exhaust manifold and configured to cool the exhaust gas discharged from the exhaust manifold; a pair of egr valves disposed at an upstream side from the intake manifold and configured to adjust an amount of the exhaust gas to be supplied to the intake manifold; and an exhaust gas connector that establishes communication between the egr cooler and the exhaust manifold, in which the exhaust gas connector includes a cooling water path to which cooling water for cooling the exhaust gas flowing inside the exhaust gas connector is supplied.. . ... Komatsu Ltd

03/29/18 / #20180087244

Method of generating image data

A method of generating image data includes moving a work implement out of an angle of view of an image pick-up apparatus, picking up an image of a work region where the work implement performs work with the image pick-up apparatus with the work implement having been moved out of the angle of view of the image pick-up apparatus, and generating image data on the work region of which image has been picked up.. . ... Komatsu Ltd

03/29/18 / #20180085848

Method for producing metal member

The method for producing a metal member includes a step of preparing a first member made of a first metal and having a recessed portion formed therein, and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of increasing temperatures of the first member and the second member by relatively rotating the second member with respect to the first member while pressing the second member against the first member with at least a part of the second member being received in the recessed portion, and a step of stopping the relative rotation of the second member with respect to the first member and cooling the first member and the second member with the members being pressed against each other.. ... Komatsu Ltd

03/22/18 / #20180080199

Work vehicle

A stereo camera attached to a vehicular main body has a first image pick-up portion and a second image pick-up portion. An optical axis of the first image pick-up portion and an optical axis of the second image pick-up portion are inclined toward the work implement at angles different from each other with respect to a central axis of a work implement in a plan view as a distance from the vehicular main body is greater.. ... Komatsu Ltd

03/22/18 / #20180080198

Periphery monitoring apparatus of operation machine and periphery monitoring method of operation machine

A periphery monitoring apparatus of an operation machine, includes an acquisition unit acquiring a peripheral condition of the operation machine; an information output unit outputting information acquired by the acquisition unit; a lifted/lowered state detection unit detecting a lifted/lowered state of a lifting ladder provided in the operation machine; and an output control unit performing changing an output content in the information output unit in accordance with the lifted/lowered state of the lifting ladder, the output content being related to the information acquired by the acquisition unit, the lifted/lowered state being detected by the lifted/lowered state detection unit.. . ... Komatsu Ltd

03/22/18 / #20180080197

Image pick-up apparatus

A first stereo camera has a first image pick-up portion and a second image pick-up portion arranged on the right side of the first image pick-up portion in a lateral direction of a vehicular main body. A second stereo camera has a third image pick-up portion and a fourth image pick-up portion arranged on the right side of the third image pick-up portion in the lateral direction of the vehicular main body. ... Komatsu Ltd

03/22/18 / #20180079361

Display system for work vehicle

A display system includes a work vehicle, a first camera, a computation device, and a display device. The first camera is attached to one side portion of the work vehicle. ... Komatsu Ltd

03/15/18 / #20180074201

Control system of work machine, work machine, management system of work machine, and method of managing work machine

A control system is provided with a position detection device which detects a position of a work machine, a contactless sensor which detects an object around the work machine in a contactless manner, a position calculation unit which calculates a position of the work machine on the basis of at least map data indicating a position of the object and detection data of the contactless sensor, and a diagnosis unit which compares the position of the work machine derived from detection data of the position detection device and the position of the work machine calculated by the position calculation unit and diagnoses that there is an abnormality in either the detection data of the position detection device or a calculation result of the position calculation unit.. . ... Komatsu Ltd

03/15/18 / #20180073214

Bulldozer

A bulldozer has a protective structure. The protective structure includes a left pillar portion, a right pillar portion, and a beam portion. ... Komatsu Ltd

03/15/18 / #20180071859

Method for producing metal member

The method for producing a metal member includes a step of preparing a first member made of a first metal, a second member made of a second metal, and a third member made of a third metal, and a step of joining the first member and the second member via the third member. The step of joining includes a step of heating the first member, the second member, and the third member by stacking the first member, the third member, and the second member in this order and relatively rotating the first member about an axis of rotation, while pressing the first member against the third member, without changing a positional relationship, and a step of cooling the first member, the second member, and the third member heated, with the members being in the stacked state.. ... Komatsu Ltd

03/15/18 / #20180071858

Method for producing metal member

The method includes a step of preparing a first member made of a first metal and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of disposing the second member in a cavity of a mold, a step of heating the first member and the second member by relatively rotating the first member with respect to the second member, while pressing the first member against the second member, without changing a positional relationship, and a step of cooling the first member and the second member with the members being in contact with each other. ... Komatsu Ltd

03/08/18 / #20180067513

Operation device of work vehicle

An operation device includes a hold portion having a base end and a leading end, and an operation portion attached to the leading end of the hold portion. The operation portion includes a finger rest extending substantially along a direction in which the hold portion extends from the base end to the leading end, and first to third operation switches disposed with the finger rest interposed therebetween.. ... Komatsu Ltd

03/08/18 / #20180066412

Bulldozer

Provided is a bulldozer enabling the visibility of a rearward area of the bulldozer's body to be improved. The bulldozer includes a cab for an operator to be aboard, a fuel tank disposed rearward of the cab, and a work platform serving as a scaffold for an operator. ... Komatsu Ltd

03/01/18 / #20180062555

Booster control device and method of controlling voltage of booster control device

A booster control device includes an output voltage detection unit that detects output voltage of a booster which changes the output voltage according to a phase difference; a storage battery voltage detection unit that detects storage battery voltage; and a booster control unit that performs feedback control on the output voltage of the booster in order for a difference between an output voltage command value to the booster and detected output voltage to be equal to zero. Further, the booster control unit includes a gain control unit that corrects a control gain according to the storage battery voltage on the basis of storage battery voltage dependency of an input-output characteristic representing booster output with respect to a phase difference of the booster, in order for the booster output to have the control gain uniquely determined by the phase difference and outputs a control phase difference to the booster.. ... Komatsu Ltd

03/01/18 / #20180058044

Image pick-up apparatus

An image pick-up apparatus includes a first stereo camera attached to a revolving unit and a second stereo camera attached to the revolving unit. The first stereo camera picks up an image of a first image pick-up range. ... Komatsu Ltd

03/01/18 / #20180058041

Control system, work machine, and control method

A control system includes: first and second hydraulic pumps; an opening/closing device provided in a passage connecting the first and second hydraulic pumps and configured to open and close the passage; a control device controlling the opening/closing device to switch between connected and unconnected states of the first and second hydraulic pumps; a first hydraulic cylinder to which hydraulic fluid from the first hydraulic pump is supplied in the unconnected state; and a second hydraulic cylinder to which hydraulic fluid from the second hydraulic pump is supplied in the unconnected state. The control device controls the opening/closing device to be in the connected state when distributed flow rates of the hydraulic cylinders are a predetermined supply flow rate or lower and a difference between a pressure in a rod-side space and a pressure in a cap-side space of the hydraulic cylinder is a defined value or smaller.. ... Komatsu Ltd

03/01/18 / #20180058037

Work vehicle

A work vehicle includes a console box disposed to a side of an operator's seat, and a support including a rotational axis disposed in a left and right direction below the console box. The console box is configured to be rotatable in a forth and back direction. ... Komatsu Ltd

03/01/18 / #20180056776

Tractor

A tractor includes a vehicle body, an engine, a cooling device, a fan, and a first exterior member. The engine is disposed on the front side of the vehicle body. ... Komatsu Ltd

03/01/18 / #20180056438

Method for producing metal member

The method includes a step of preparing a first member made of a first metal and a second member made of a second metal having a smaller deformation resistance than the first metal, and a step of joining the first member and the second member. The step of joining includes a step of heating the first member and the second member by relatively rotating the first member and the second member, while pressing the first member and the second member against each other, without changing a relative positional relationship therebetween, and a step of cooling the first member and the second member heated, while being pressed against each other. ... Komatsu Ltd

02/22/18 / #20180051794

Power transmission device and work vehicle provided with power transmission device

A power transmission device for a work vehicle includes a boss section, a spline shaft, a rotational force transmission section, and a housing. The boss section includes a spline groove on an internal circumferential surface thereof. ... Komatsu Ltd

02/22/18 / #20180051693

Sliding component and method for producing the same

A sliding component and its producing method are provided. The sliding component includes a base section made of steel or cast iron, and a sliding section having a sliding surface, made of copper alloy including hard particles, and joined to the base section. ... Komatsu Ltd

02/22/18 / #20180051445

Wheel loader and method for automatically accumulating transport operation information of wheel loader

The wheel loader includes a boom, a bucket, a travel device, a travel distance measuring unit, a state determining unit, and an accumulating unit. The bucket is attached to the tip end of the boom. ... Komatsu Ltd

02/22/18 / #20180051441

Cab and work vehicle

A cab includes a dash panel disposed frontward of an operator's seat, and a monitor device disposed above the dash panel. The whole of the monitor device in the right-left direction overlaps a first front window when the monitor device is seen in the front-rear direction. ... Komatsu Ltd

02/22/18 / #20180050727

Working vehicle

A working vehicle includes a housing member in which fluid is housed, and a gauge that indicates a remaining amount of the fluid in the housing member. The gauge is disposed at a central portion of the housing member in a longitudinal direction.. ... Komatsu Ltd

02/22/18 / #20180050588

Crawler belt-type tractor

A crawler belt-type tractor includes a vehicle body, a travel device, an engine, and a fuel tank. The travel device is attached to the vehicle body. ... Komatsu Ltd

02/22/18 / #20180050385

Track link and method for manufacturing track link

A track link includes a tread surface, a shoe surface, a communicating part, and a seat formation part. The tread surface comes into contact with a roller for an undercarriage. ... Komatsu Ltd

02/15/18 / #20180044893

Working machine

A work machine includes plural cameras, a display unit and a controller controlling the cameras and the display unit. The controller includes an overview image generator generating an overview image from the images by the cameras, an image superimposing unit superimposing a top view image of the work machine on the overview image, a working-equipment display unit putting a part of working equipment in the top view image of the work machine in non- or transparent-display, and an operation judging unit judging at least one of operation of the working equipment and travel of the work machine. ... Komatsu Ltd

02/15/18 / #20180044884

Vertically-movable steps for working vehicles

A ladder includes: a front connecting member and a rear connecting member at a top step, respective upper ends of which are connected to a lateral side of a vehicle body in a pivotally movable manner and are juxtaposed with a predetermined space therebetween in a vehicle front-back direction; a front connecting member and a rear connecting member which are provided at a step under the top step, and respective upper ends of which are connected in a pivotally movable manner to both ends in the vehicle front-back direction of a step board. The front connecting member and the rear connecting member at least at the top step among steps positioned above a lowest step are rigid members. ... Komatsu Ltd

02/15/18 / #20180043929

Work vehicle and method for controlling work vehicle

An articulated work vehicle with linked front and rear frames includes a hydraulic actuator, a joystick lever operated by an operator, a control valve, a force imparting component, and a controller. The hydraulic actuator is driven hydraulically to change a steering angle of the front frame with respect to the rear frame. ... Komatsu Ltd

02/08/18 / #20180040174

Component information management system and component information management method

A parts information management system includes an identification device attached to a target part at an installation position and storing parts information for identifying the target part, a communication device communicating with the identification device to acquire the parts information, a transmitter transmitting acquisition information, and a management apparatus managing the received acquisition information. The parts information includes type information indicating the target part's type and unique information for distinguishing the target part from the target parts of the same type. ... Komatsu Ltd

02/08/18 / #20180038082

Control system for work vehicle, control method, and work vehicle

A current terrain acquisition device acquires current terrain information. The current terrain information indicates the current terrain to be worked, and includes the height of the current terrain at a plurality of points. ... Komatsu Ltd

02/08/18 / #20180038070

Control system for work vehicle, control method, and work vehicle

A current terrain acquisition device acquires current terrain information indicating a current terrain to be worked. A controller is configured to generate an inclined virtual surface extending from a current position of the work vehicle. ... Komatsu Ltd

02/08/18 / #20180038069

Control system for work vehicle, control method, and work vehicle

A current terrain acquisition device acquires current terrain information indicating the current terrain to be worked. A controller is configured to decide a virtual design surface that is located below the current terrain and has an inclination angle. ... Komatsu Ltd

02/08/18 / #20180038068

Control system for work vehicle, control method, and work vehicle

A terrain information acquisition device acquires terrain information about a work site. A controller is configured to decide an inclination angle of the current terrain along a travel direction of the work vehicle from the terrain information. ... Komatsu Ltd

02/08/18 / #20180038067

Control system for work vehicle, control method, and work vehicle

A controller is configured to acquire current terrain information indicating the current terrain in the travel direction of a work vehicle. The controller is configured to generate an inclined virtual surface extending form the current position of the work vehicle. ... Komatsu Ltd

02/08/18 / #20180037255

Work vehicle and method for controlling work vehicle

An articulated work vehicle with linked front and rear frames includes a joystick lever, a force imparting component, a speed sensor, and a controller. The joystick lever is configured to change a steering angle of the front frame with respect to the rear frame by operation by an operator. ... Komatsu Ltd

02/01/18 / #20180030692

Control system, work machine, and control method

A control system includes a cylinder pressure data acquisition unit that acquires cylinder pressure data indicating a pressure of operating oil of a hydraulic cylinder; an operation amount data acquisition unit that acquires operation amount data of an operating device; a pump flow rate calculation unit that calculates a first pump flow rate indicating a flow rate of the operating oil discharged from a first hydraulic pump and a second pump flow rate indicating a flow rate of the operating oil discharged from a second hydraulic pump in a splitting state in which a passage is closed based on the cylinder pressure data and the operation amount data; and a pump control unit that controls the first hydraulic pump and the second hydraulic pump based on the first pump flow rate and the second pump flow rate.. . ... Komatsu Ltd

02/01/18 / #20180030691

Work vehicle and method of controlling operation

A work vehicle detects pressure of hydraulic oil supplied to an arm cylinder. The work vehicle determines operation details for an arm. ... Komatsu Ltd

02/01/18 / #20180029464

Tractor

A tractor includes an air cleaner and a passageway arranged to surround the air cleaner. Alternatively, tractor includes a maintenance equipment, an engine, a top plate covering the engine, and a floor section disposed at a position lower than the top plate and in a non-overlapping position with the engine as seen from above. ... Komatsu Ltd

01/18/18 / #20180016969

Hydraulic servo device and turbocharger

A hydraulic servo device includes: a servo piston configured to move in an axial direction with respect to a device main body; and a stroke sensor configured to detect an amount of movement of the servo piston with respect to the device main body. The hydraulic servo device is configured to change a supply flow rate of exhaust gas to a turbine of a turbocharger by moving the servo piston according to applied hydraulic pressure. ... Komatsu Ltd

01/11/18 / #20180010320

Work vehicle, monitoring system for work vehicle, and tracked work vehicle

A work vehicle includes a rotary member, a support member, a sealing ring, a pressure controller, and a vehicle speed determination component. The rotary member has a first hydraulic fluid supply channel to supply the hydraulic fluid to the steering clutch, and is rotated by power from the transmission when the steering clutch is engaged. ... Komatsu Ltd

01/04/18 / #20180002901

Control system for work vehicle, control method, and work vehicle

A control system for a work vehicle includes at least one sensor, an operating device, and a controller. The operating device includes at least one operating member. ... Komatsu Ltd

01/04/18 / #20180002894

Control system for work vehicle, control method, and work vehicle

A control system for a work vehicle includes an acceleration detection device and a controller. The acceleration detection device detects an acceleration of the work vehicle. ... Komatsu Ltd

01/04/18 / #20180002892

Work vehicle and ripper device

A ripper device includes a first cylinder, a shank, and an arm. The first cylinder includes a tube and a rod, and is disposed to extend and retract in the forward and backward direction in a plan view of the ripper device. ... Komatsu Ltd

12/28/17 / #20170370072

Hydraulic excavator

A hydraulic excavator includes an upper revolving unit revolvably mounted on a lower traveling unit. A counterweight is disposed on a rear end part of the upper revolving unit. ... Komatsu Ltd

11/30/17 / #20170342687

Work machine control system, work machine, and work machine control method

A work machine control system that controls a work machine including a member that rotates about a shaft line includes a target construction shape generation unit that generates a target construction shape indicating a target shape of a construction target of the work machine; and a determination unit that outputs first information when the member is present on an air side which is a side on which the work machine is present in relation to the target construction shape and outputs second information when the member is not present on the air side.. . ... Komatsu Ltd

11/30/17 / #20170342680

Work machine control system, work machine, and work machine control method

A work machine control system that controls a work machine including a working device having a working tool that rotates about a shaft line includes: a target construction shape generation unit that generates a target construction shape indicating a target shape of a construction target of the work machine; a target shape calculation unit that calculates a control target shape which is a target shape when controlling rotation of the working tool from the target construction shape and calculates an extended target shape obtained by extending the control target shape; and a working device control unit that controls the rotation of the working tool about the shaft line based on a distance between the working tool and the control target shape and the extended target shape.. . ... Komatsu Ltd

11/30/17 / #20170342679

Construction machine control system, construction machine, and construction machine control method

A construction machine control system includes: a target construction ground shape generation unit which generates a target construction ground shape indicating a target shape of an excavation target; a working device control instruction determination unit which outputs an instruction for driving the working device in a working device operation plane orthogonal to at least one of a boom axis, an arm axis, and a bucket axis based on an operation state of at least one of an arm and a bucket and a distance between the bucket and the target construction ground shape; and a tilting control instruction determination unit which outputs an instruction for performing a tilting control of the bucket about a tilting axis based on a tilting state of the bucket and the distance between the bucket and the target construction ground shape.. . ... Komatsu Ltd

11/30/17 / #20170342678

Construction machine control system, construction machine, and construction machine control method

A construction machine control system includes: a target construction ground shape generation unit generating a target construction ground shape indicating a target shape of an excavation target; a tilting data calculation unit calculating tilting data of a bucket tilted about a tilting axis; a regulation point position data calculation unit calculating position data of a regulation point set in the bucket based on external shape data of the bucket including at least width data of the bucket; a tilting target ground shape calculation unit calculating a tilting target ground shape extending in a lateral direction of the bucket in the target construction ground shape based on the position data of the regulation point, the target construction ground shape, and the tilting data; and a working device control unit controlling a tilting of the bucket based on a distance between the regulation point and the tilting target ground shape.. . ... Komatsu Ltd

11/30/17 / #20170341915

Work vehicle and work vehicle control method

A method of controlling a work vehicle including a steering cylinder operating a steering wheel by hydraulic oil supplied thereto, a steering member receiving an input for operating the steering wheel, and a steering valve unit which is connected to the steering member and supplies the hydraulic oil to the steering cylinder, the method includes: obtaining a speed of the work vehicle and a steering angle of the steering wheel; and decreasing a correction factor for correcting a deviation amount of actual steering angle information of the steering wheel with respect to target information as information on a target steering angle of the steering wheel with respect to an operation amount of the steering member when the speed of the work vehicle increases in a case where the steering angle of the steering wheel obtained based on the steering angle is in a predetermined range from a neutral position.. . ... Komatsu Ltd

11/23/17 / #20170335918

Cylinder rod

The cylinder rod of a hydraulic cylinder includes a body portion having a bar shape, and a head portion arranged at a longitudinal end of the body portion. The body portion has a coating formed on its outer peripheral surface. ... Komatsu Ltd

11/23/17 / #20170335548

Work vehicle

Lift cylinder is attached to a center part of a vehicle body in a vehicle width direction. The lift cylinder causes a work implement to move up and down. ... Komatsu Ltd

11/16/17 / #20170328253

Reducing agent supply device and method for controlling reducing agent supply device

A reduction-causing agent supply device includes a tank to store a reduction-causing agent, a pumping unit to pump the reduction-causing agent, a reduction-causing agent supply passage to supply the reduction-causing agent, an injection nozzle to inject the reduction-causing agent into an exhaust pipe, a drawing-back unit to draw the reduction-causing agent toward the tank, and a controller. After stop of an engine, the controller performs: reduction-causing agent drawing-back process of drawing the reduction-causing agent toward the tank and introducing exhaust gas from the injection nozzle into the reduction-causing agent supply passage; and gas discharge process of supplying the reduction-causing agent to compress the exhaust gas inside the reduction-causing agent supply passage, discharging the compressed exhaust gas from the injection nozzle, and closing a valve of the injection nozzle before the reduction-causing agent reaches the injection nozzle.. ... Komatsu Ltd

11/16/17 / #20170328029

Work vehicle and ripper device

A ripper device for a work vehicle includes a first cylinder, a shank, and a second cylinder. The shank is actuated by the first cylinder and is aligned with the first cylinder in plan view. ... Komatsu Ltd

11/16/17 / #20170327046

Work vehicle

An access device is configured to be switched between a stored state in which an access member is stored in a vehicle body and a deployed state in which the access member is deployed. In the stored state, an exterior cover becomes a portion of the an exterior surface of the vehicle body and the access member is stored inside the vehicle body. ... Komatsu Ltd

11/09/17 / #20170321395

Posture calculation device of working machinery, posture calculation device of excavator, and working machinery

A posture calculation device of working machinery includes: a measuring device configured to detect an angle speed and acceleration; a posture angle calculation unit configured to obtain a posture angle of the working machinery from the detected angle speed and the detected acceleration; a first complementary filter to which a first cutoff frequency is set and configured to decrease a noise included in the obtained posture angle to output a first posture angle; a second complementary filter to which a second cutoff frequency different from the first cutoff frequency is set and configured to decrease a noise included in the obtained posture angle to output a second posture angle; and a switching unit configured to switch between the first posture angle and the second posture angle to output the first posture angle or the second posture angle according to a state of the measuring device.. . ... Komatsu Ltd

11/09/17 / #20170321392

Work vehicle

A work vehicle includes a vehicle body, a travel device, a driving source, and a cooling device. The travel device is provided below the vehicle body. ... Komatsu Ltd

10/26/17 / #20170305018

Surrounding monitoring device of work machine and method of monitoring surroundings of work machine

A surrounding monitoring device of a work machine includes: a display unit; a plurality of cameras acquiring a surrounding condition of the work machine; an image processing unit generating a bird's-eye image indicating the surrounding condition of the work machine on the basis of images imaged by the cameras; a work machine operation detection unit detecting an operation of the work machine; and a display control unit displaying, on the display unit, a single camera image imaged by one or more cameras, of the plurality of cameras, the bird's-eye image, mechanical gauge display, menu display, and/or breakdown information display. Further, when the operation of the work machine is detected, the display control unit performs control of enlarging surroundings of the work machine on the bird's-eye image, compared with surroundings of the work machine on the bird's-eye image before the operation of the work machine is detected.. ... Komatsu Ltd

10/12/17 / #20170294938

Communication system and work vehicle

A communication system provided to a working vehicle includes: an information receiving unit that communicates with identification devices and receives identification information; a first area information storage that stores first area information indicating an area where use of the information receiving unit is permitted; a comparing unit that compares the first area information with second area information indicating an area where the working vehicle is used; and a communication control unit that prohibits the information receiving unit from outputting electric waves when the second area information is not included in the first area information.. . ... Komatsu Ltd

10/12/17 / #20170294057

Identification information acquisition system and working vehicle

A identification information acquisition system provided in a working vehicle includes: a plurality of identification devices; and a plurality of communication devices that communicate with the plurality of identification devices. The plurality of communication devices include a first communication device and a second communication device, an operation of which is controlled by the first communication device. ... Komatsu Ltd

10/12/17 / #20170292247

Control system for work vehicle, control method and work vehicle

A control system for a work vehicle having a work implement includes a first operating lever for the work implement, a first operating member and a controller. The first operating member is provided on the first operating lever. ... Komatsu Ltd

10/05/17 / #20170287651

Capacitor and capacitor module

An object of the present invention is to provide a capacitor and a capacitor module having a long life and capable of a stable action. Therefore, an electrolytic solution l obtained by dissolving an electrolyte salt having a lower hydrolyzability and a higher reaction potential in an electrode than an amidine salt containing a cation which is an imidazolium in a solvent and a sub solvent that reduces resistance of the electrolytic solution is packed in a cell. ... Komatsu Ltd

10/05/17 / #20170285658

Work vehicle control system

A work vehicle control system controls a work vehicle having a braking device. The work vehicle control system includes a location information generating unit that obtains and outputs a location of the work vehicle, and a control unit that controls the braking device based on location information of the work vehicle obtained from the location information generating unit. ... Komatsu Ltd

10/05/17 / #20170285657

Control system for work machine, work machine, and control method for work machine

A control system for a work machine includes a non-contact sensor, a position output device, a correction position calculation unit, and a control device. The non-contact sensor detects a periphery of a work machine. ... Komatsu Ltd

10/05/17 / #20170284274

Dump truck

A dump truck includes: a vehicle body; a cooling fan (9a) disposed in front of the vehicle body in a travel direction; an engine (7) disposed behind the cooling fan (9a); a platform (8) covering the cooling fan (9a) and a top of the engine (7); an exhaust aftertreatment device (11) disposed behind the engine (7) and above the platform (8); an opening (12a) through which an upper side of the platform (8) communicates with a lower side thereof and provided in front of the exhaust aftertreatment device (11); and a duct (21, 22) provided to a lower surface of the platform (8) and comprising a base-end opening connected to the opening (12a) and a leading-end opening (21a) directed to the cooling fan (9a).. . ... Komatsu Ltd

10/05/17 / #20170284071

Calibration system, work machine, and calibration method

A calibration system includes at least a pair of imaging devices in a work machine having a working unit that image an object; a position detector detecting a position of the working unit; and a processing unit that, by using first position information about a predetermined position of the working unit captured by the imaging devices, second position information about the predetermined position detected by the position detector in an attitude of the working unit taken when the imaging devices image the predetermined position, and third position information about a predetermined position outside the work machine, imaged by the imaging devices, obtains information about a position and an attitude of the imaging devices, and transformation information used for transforming a position of the object imaged by the imaging devices from a first coordinate system to a second coordinate system.. . ... Komatsu Ltd

10/05/17 / #20170284070

Control device for work machine, work machine, and method of controlling work machine

A control device for a work machine is a device for controlling a working unit of a work machine to excavate an object to be excavated. The control device includes a control unit for controlling the working unit to prevent a working implement of the working unit from crossing a predetermined target profile, and a switching unit for defining the target profile as an offset profile separated by a predetermined distance from a target excavation profile that is a target profile for finishing of the object to be excavated or the target excavation profile, based on an attitude of the working implement relative to the target excavation profile.. ... Komatsu Ltd

10/05/17 / #20170284069

Surrounding monitoring device for work machine

A surrounding monitoring device for a work machine including a work device on an upper swing body includes: a plurality of cameras configured to acquire a surrounding condition of the work machine; an image processor configured to generate a bird's-eye image based on images imaged by the plurality of cameras; a display configured to display at least one of: a single camera image imaged by one of the plurality of cameras; and the bird's-eye image; and a display controller configured to display, on the at least one of the single camera image and the bird's-eye image, direction guide information arranged from a reference position of the upper swing body to surroundings of the upper swing body.. . ... Komatsu Ltd

10/05/17 / #20170284066

Working vehicle

A working vehicle includes a vehicle main body to which a tire is mounted, an excavation member coupled to the vehicle main body on a front side of the vehicle main body and that includes an end part arranged on an outer side of the tire in a vehicle-width direction of the vehicle main body, a hydraulic cylinder arranged at a center part in the vehicle-width direction and that is to move the excavation member, a housing that houses a power transmission mechanism to transmit power to the tire, and a camera supported by a part of the vehicle main body on a lower side of the hydraulic cylinder and on an upper side of the housing and that acquires an image of a region that includes end parts on both sides of the excavation member and that is between the excavation member and the tire.. . ... Komatsu Ltd

10/05/17 / #20170284058

Cooling device and construction machine

A cooling device includes: an introduction pipe configured to introduce a charge air supercharged by a supercharger; a first aftercooler connected to the introduction pipe and configured to cool the charge air; a branch pipe branched from the introduction pipe; a second aftercooler connected to the branch pipe and configured to cool the charge air; and a cooling fan configured to supply a cooling wind to the first aftercooler and the second aftercooler, in which the first aftercooler and the second aftercooler are disposed to be shifted from each other in a rotation axis direction of the cooling fan.. . ... Komatsu Ltd

10/05/17 / #20170282961

Work vehicle

A controller disables the motion of a steering cylinder brought about by a steering lever when an enabled state is selected via a lever switch and an instruction to start an engine is issued via a main switch.. . ... Komatsu Ltd

09/28/17 / #20170280048

Evaluation device

An evaluation device includes a first display control unit that displays imaging data acquired by an imaging device on a display screen of a display device, and a second display control unit that displays on the display screen a guide display based on work vehicle data on a work vehicle imaged, to determine an imaging position of the imaging device.. . ... Komatsu Ltd

09/28/17 / #20170278425

Evaluation apparatus and evaluation method

An evaluation apparatus includes a detected data acquisition unit that acquires photograph data of a bucket of a work equipment, a first display control unit that displays the photograph data on a display screen of a display device, a second display control unit that displays on the display screen a graphic representing at least part of an outline of the bucket as viewed from a side, and moves the graphic on the display screen by an operation of an input device, and an identification unit that distinguishes the bucket from excavated material above an opening end of the bucket on the display screen based on the graphic aligned with the bucket.. . ... Komatsu Ltd

09/28/17 / #20170277163

Communication system and work vehicle

A communication system provided in a working vehicle includes: an identification device that stores identification information; a communication device that outputs electric waves to communicate with the identification device; an ambient temperature judging unit that judges whether or not an ambient temperature of the environment in which the identification device is disposed exceeds an operational temperature at which an operation of the identification device is ensured; and a communication controller that prohibits the communication device from outputting the electric waves when the ambient temperature judges that the ambient temperature exceeds the operational temperature.. . ... Komatsu Ltd

09/28/17 / #20170276055

Hydraulic pump/motor with rotation detection mechanism

A hydraulic pump/motor includes a rotational shaft rotatably attached inside a casing, a cylinder block configured to rotate together with the rotational shaft, a plurality of pistons, a swash plate, a valve plate, and a rotation detection mechanism. The rotation detection mechanism includes a detection target section having three or more recesses formed on an outer peripheral surface of the cylinder block in a unique arrangement pattern with different arc lengths between the three continuous recesses with respect to one rotational direction of the rotational shaft and being formed so as not to include the unique arrangement pattern with respect to the other rotational direction of the rotational shaft, each of the three or more recesses having a cross section having a same semicircular shape perpendicular to a direction of the rotational shaft; and a rotation sensor arranged in the casing in a state of facing the detection target section.. ... Komatsu Ltd

09/28/17 / #20170274896

Work vehicle and method for controlling same

A control unit in a work vehicle executes an automatic downshift for shifting a transmission from a current speed range to a speed range that is lower than the current speed range when at least a first condition, a second condition, a third condition, and a fourth condition are satisfied. The first condition is that an operating amount of an accelerator operating member of the work vehicle is equal to or greater than a predetermined accelerator threshold. ... Komatsu Ltd

09/28/17 / #20170274762

Work vehicle

A work vehicle includes a front wheel, a rear wheel, a liquid tank, a front-wheel fender, a rear-wheel fender, a floor portion, and an electric-component room. The front wheel, the rear wheel, and the liquid tank are supported by a vehicle body. ... Komatsu Ltd

09/21/17 / #20170268204

Control system for work vehicle, control method, and work vehicle

A control deciding unit for deciding to execute a leveling control for controlling a work implement so that the work implement moves along a design terrain when a leveling determination condition is satisfied. The control deciding unit decides to execute a surface compaction control for limiting the velocity of the work implement toward the design terrain in response to the distance between the work implement and the design terrain when a surface compaction determination condition is satisfied. ... Komatsu Ltd

09/21/17 / #20170268198

Control system for work vehicle, control method, and work vehicle

A distance obtaining unit obtains the distance between a work implement and a design terrain. A work aspect determining unit determines a work aspect by the work implement. ... Komatsu Ltd

09/14/17 / #20170260717

Work machine and correction method of working equipment parameter for work machine

A work machine includes: first working equipment with first working equipment parameter; second working equipment including a parallel link and being attachable to the first working equipment; a swing angle detector that detects swing angle information of the first working equipment; an attitude calculating unit that calculates an attitude of the first working equipment based on the detected swing angle information of the first working equipment; a working equipment parameter storage that stores the first working equipment parameter defined for a component of the first working equipment; a correction information acquiring unit that acquires information on the second working equipment as correction information; and a working equipment parameter correction unit that corrects the first working equipment parameter based on the correction information on the second working equipment acquired by the correction information acquiring unit.. . ... Komatsu Ltd

09/14/17 / #20170260714

Bulldozer

A first grille member extends from the left side of the vehicular body toward the right side. A second grille member extends from the first grille member further toward the right side. ... Komatsu Ltd

09/07/17 / #20170255895

Evaluation device and evaluation method

An evaluation device includes a detection data acquisition unit that acquires detection data including a detected movement trajectory of a predetermined portion of a working unit of a working vehicle based on operation data of the working unit from a movement starting position to a movement ending position, detected by a detection device that detects an operation of the working unit, a target data generation unit that generates target data including a target movement trajectory of the predetermined portion of the working unit, and an evaluation data generation unit that generates evaluation data of an operator who operates the working unit based on the detection data and the target data.. . ... Komatsu Ltd

08/31/17 / #20170248439

Control system for work machine, work machine, and management system for work machine

A control system includes: a detector detecting a position of a work machine running on a running path; a non-contact sensor detecting an object at a side of the running path; a generator generating map data of a work site based on detection data from the detector and the non-contact sensor; a first storage storing past map data generated in the generator based on the detection data from the detector and the non-contact sensor acquired in a predetermined period in a past; a second storage storing current map data generated in the generator based on the detection data from the detector and the non-contact sensor; a first calculator calculating integrated map data by integrating the past map data and the current map data; and a second calculator by matching the integrated map data and the detection data from the non-contact sensor, calculates the position of the work machine.. . ... Komatsu Ltd

08/31/17 / #20170247861

Work machine control device, work machine, and work machine control method

A control device includes a control unit configured to change a change rate of a moving speed of a working unit of a work machine according to the moving speed of the working unit in a timing of switching between intervention control toward the working unit and control of the working unit based on an operation command from an operation device.. . ... Komatsu Ltd

08/24/17 / #20170241316

Work vehicle

The reducing agent tank has a tank main body and a feed pipe. The tank main body stores a reducing agent to be supplied to an exhaust gas treatment device. ... Komatsu Ltd

08/24/17 / #20170241106

Construction machine control system, construction machine, and method of controlling construction machine

A control system controls a construction machine that includes a work machine including a bucket having a plurality of tilting mechanisms. The control system includes: a tilt angle sensor that is provided in the bucket so as to detect tilt angle data including a rotation angle of the bucket about the tilt shaft, the tilt angle sensor being capable of detecting an inclination angle with respect to a horizontal plane; a data acquisition unit to which the tilt angle data is output from the tilt angle sensor; a data fixing unit that fixes the tilt angle data output to the data acquisition unit based on a fixing command to generate fixed data; and a work machine control unit that controls the work machine based on the fixed data until the fixing command is disabled.. ... Komatsu Ltd

08/03/17 / #20170220044

Work machine control system, work machine, and work machine management system

A work machine control system is configured to control a work machine that travels on a travel route and includes a position detection unit, a non-contact sensor, and a control unit. The position detection unit detects a position of the work machine. ... Komatsu Ltd

08/03/17 / #20170220042

Work machine control system, work machine, and work machine management system

A work machine control system is configured to control a work machine that travels in an operation region and includes a position detection unit, a non-contact sensor, and a control unit. The position detection unit detects a position of the work machine. ... Komatsu Ltd

08/03/17 / #20170219053

Planetary gear type transmission

A first carrier rotates integrally with an input shaft. A third sun gear and a fourth sun gear rotate integrally with a first intermediate shaft. ... Komatsu Ltd

08/03/17 / #20170217516

Sprocket wheel and method for producing the same

A sprocket wheel has an annular shape. The sprocket wheel has a plurality of projections formed on an outer peripheral surface for transmitting a driving force to a track. ... Komatsu Ltd

08/03/17 / #20170216976

Machine component and method for producing the same

A sprocket wheel, which is an example of the machine component, includes a base made of a first metal, and an overlay disposed in contact with the base to cover at least a part of a surface of the base. The overlay includes a matrix made of a second metal, and hard particles dispersed in the matrix. ... Komatsu Ltd

08/03/17 / #20170216951

Wear-resistant component and method for producing the same

A tooth which is an example of a wear-resistant component includes a base made of a first metal, and an overlay disposed in contact with the base to cover a covered region that is a part of a surface of the base. In an overlay edge portion corresponding to a boundary between the covered region and an exposed region other than the covered region on the surface of the base, the exposed region and a surface of the overlay are flush with each other to form a forged surface.. ... Komatsu Ltd

08/03/17 / #20170216950

Machine component and method for producing the same

A sprocket wheel, which is a machine component configured to slide relative to a bushing while being in contact with the bushing in an outer peripheral surface, includes a base made of a first metal, and an overlay that covers the base so as to constitute the outer peripheral surface. The surface of the overlay constituting the outer peripheral surface has been smoothed. ... Komatsu Ltd

08/03/17 / #20170216949

Machine component and method for producing the same

A sprocket wheel, which is an example of the machine component, includes a base made of a first metal, and an overlay disposed in contact with the base to cover at least a part of a surface of the base. The overlay includes a matrix made of a second metal, and hard particles dispersed in the matrix. ... Komatsu Ltd

07/27/17 / #20170211255

Hydraulic excavator

A hydraulic excavator capable of improving accessibility to a pipe which forms a path connecting a reducing agent tank and an exhaust gas treatment device to each other is provided. The hydraulic excavator includes a pipe portion forming a path connecting the reducing agent tank and the exhaust gas treatment device to each other, a duct component member arranged along the pipe portion, and an openable and closable exterior cover forming a part of a lateral side surface of the body of the excavator. ... Komatsu Ltd

07/27/17 / #20170210386

Work vehicle and control method for work vehicle

A work vehicle includes: an engine; a plurality of drive wheels driven by the engine; and an operation controller executes first drive force control that brakes a slipping drive wheel out of the plurality of drive wheels and executes second drive force control that reduces output of the engine in accordance with the slip ratio of the slipping drive wheel during execution of the first drive force control.. . ... Komatsu Ltd

07/20/17 / #20170204589

Construction machine, hybrid hydraulic excavator, and output torque control method for motor generator

A construction machine includes a swing speed detection unit that detects an actual swing speed of an upper structure, a lever command speed calculation unit that calculates a lever command speed based on an operation amount of a swing lever for swinging the upper structure, a torque command value calculation unit that calculates a torque command value based on a command speed based on the calculated lever command speed, a command value output unit that outputs a command torque to a rotary motor generator based on the torque command value calculated by the torque command value calculation unit and the swing speed detected by the swing speed detection unit, and a command value output restriction unit that restricts the output of the torque command value from the command value output unit under predetermined conditions.. . ... Komatsu Ltd

07/20/17 / #20170203753

Hybrid work machine engine control device, hybrid work machine, hybrid work machine engine control method

A hybrid work machine engine control device which is mounted on a hybrid work machine having a working unit that operates with operating oil supplied from a hydraulic pump and which controls an internal combustion engine that drives a generator motor and the hydraulic pump with generated power, includes: a processing unit that increases torque required for the generator motor to generate electric power with a lapse of time and decreases absorption torque that the hydraulic pump absorbs when the generator motor generates electric power during operation of the internal combustion engine.. . ... Komatsu Ltd

07/20/17 / #20170203749

Engine control device of work machine, work machine, and engine control method of work machine

An engine control device of a work machine controls an internal-combustion engine of the work machine including a swing body, an implement attached to the swing body, a hydraulic actuator that operates the implement, a hydraulic pump that operates the hydraulic actuator, and the internal-combustion engine that drives the hydraulic pump and of which a rotation speed is changed according to a load. The engine control device of the work machine includes: a determination unit configured to determine whether a condition not requiring work with the implement is established; and an engine control unit configured to enable control at relief time of determining a target rotation speed targeted by the internal-combustion engine based on horsepower sucked by the hydraulic pump of when a hydraulic oil ejected by the hydraulic pump is relieved when the condition is established, and disables the control at relief time when the condition is not established.. ... Komatsu Ltd

07/20/17 / #20170203748

Control device for hybrid work machine, hybrid work machine, and control method for hybrid work machine

A control method for a hybrid work machine that includes an internal combustion engine that drives a working unit, and a generator motor connected to the internal combustion engine and transfers and receives electric power to/from a power storage device, the control method includes: determining whether a situation is at a time of an output limitation in which an output of the internal combustion engine is limited; at the time of the output limitation, limiting an assist operation of supplying the electric power stored in the power storage device to the generator motor in a case of increasing an output of the internal combustion engine based on a work request for the working unit at a time of working; and controlling the internal combustion engine and the generator motor in a state in which the assist operation is limited.. . ... Komatsu Ltd

07/20/17 / #20170203647

Cooling device and work vehicle equipped with same

A cooling device includes a first radiator core, a second radiator core, a fan, a ventilation component, and a blocked part. The first radiator core and the second radiator core (42) are disposed adjacently with a specific space in between. ... Komatsu Ltd

07/20/17 / #20170203645

Hybrid work machine control device, hybrid work machine, and hybrid work machine control method

A control method for a hybrid work machine including an internal combustion engine which includes an exhaust gas treatment device, a generator motor which is connected to an output shaft of the internal combustion engine, and an electrical storage device which stores electric power generated by the generator motor or supplies electric power to the generator motor, the control method for the hybrid work machine includes: determining whether the hybrid work machine is in a regeneration state in which a regeneration is performed by the exhaust gas treatment device; setting a threshold value for starting a generation of power by the generator motor to a minimum generation torque as a lower limit value when it is determined that the exhaust gas treatment device performs a regeneration; and controlling the generator motor based on the set threshold value.. . ... Komatsu Ltd

07/20/17 / #20170203383

Device for producing metal member

A metal member producing device includes a spindle, a base portion, and a driving portion which drives at least one of the spindle and the base portion in an axial direction of the spindle. Of the spindle and the base portion, one includes a first holding portion for holding a first member. ... Komatsu Ltd

07/06/17 / #20170192434

Work machine control system, work machine, work machine management system, and method for controlling work machine

A method for controlling a work machine, includes: detecting an area present ahead in a traveling direction of a work machine, in which a target traveling speed of the work machine is constant and is lower than a traveling speed at a current point of time; when the area is detected, obtaining a corrected value for correcting the accelerating instruction value; adding the corrected value and an accelerating instruction value for controlling a traveling speed of the work machine obtained based on the target traveling speed to obtain a corrected accelerating instruction value; and outputting the corrected accelerating instruction value to a drive device configured to drive a traveling device in the work machine.. . ... Komatsu Ltd

07/06/17 / #20170190293

Access system and work vehicle

A climbing apparatus body is supported by a main frame rotatably about a rotational shaft at one end. The climbing apparatus body is capable of taking an in-use posture in which the climbing apparatus body is inclined so that the other end is located below the one end and a folded posture in which the climbing apparatus body stands so that the other end is directed upward. ... Komatsu Ltd

06/22/17 / #20170175364

Construction information display device and method for displaying construction information

A construction information display device configured to display construction information includes: a display unit configured to display at least a partial distribution map indicating a current landform and a design landform; an input unit through which a target surface is selected from the design landform; and a display processing unit configured to, when the target surface is selected through the input unit, display a range of the selected target surface while visibly displaying the partial distribution map within the selected target surface.. . ... Komatsu Ltd

06/22/17 / #20170175362

Display system of excavation machine, excavation machine, and image display method

A display system of an excavation machine including a work machine having a bucket and a body portion on which the work machine is mounted, the display system of the excavation machine includes: a bucket position information generation unit which generates position information of the bucket; a storage unit which stores information of a dimension of the bucket and information of a target construction surface indicating a target shape of a construction object; a display unit which displays an image of the target construction surface on a screen; and a processing unit which displays a straight line image that is generated by extracting a part corresponding to a bottom surface of the bucket viewed from a side surface along with the image of the target construction surface on the display unit.. . ... Komatsu Ltd

06/22/17 / #20170175358

Cab and bulldozer

Provided is a cab which can improve the workability of ripping. The cab includes an operator's seat placed in the cab and a right armrest placed rightward of the operator's seat in the cab. ... Komatsu Ltd

06/22/17 / #20170175357

Work vehicle

A work vehicle which can provide more accommodation space for articles on a vehicular body frame is provided. A rear cab mount on which a cab of a hydraulic excavator is mounted is mounted on a revolving frame and forms a hollow rear under-mount space. ... Komatsu Ltd

06/22/17 / #20170174123

Control system for work machine, work machine, management system for work machine, and management method for work machine

A control system for a work machine includes: a turn determination unit configured to determine whether the work machine makes a turn with a predetermined curvature radius or less over a predetermined distance or more, based on running condition data including at least position data and target azimuth data for performing running control of the work machine; and a winkers control unit configured to output a winker control signal based on a determination result of the turn determination unit.. . ... Komatsu Ltd

06/15/17 / #20170167116

Work vehicle and method for obtaining tilt angle

A hydraulic excavator is provided with a tilt cylinder disposition data creating unit and a bucket information computing unit. The tilt cylinder disposition data creating unit creates tilt cylinder disposition data which indicates that a disposition of a tilt cylinder is either a first disposition in which a bucket is rotated in the clockwise direction due to extension or a second disposition in which the bucket is rotated in the clockwise direction due to contraction, when viewing the bucket from a vehicle body side. ... Komatsu Ltd

06/15/17 / #20170167111

Cab and work vehicle

Provided is a cab in which an engine stop switch can be caused to make an emergency stop and an improper operation of the engine stop switch can be suppressed. The cab includes an operator's seat placed in the cab and the engine stop switch for causing the engine to make an emergency stop. ... Komatsu Ltd

06/15/17 / #20170166021

Work vehicle, method for operating tow apparatus, and method for assembling tow apparatus

A tow pin has a main body portion in a columnar shape and a first protrusion protruding outward from an outer circumferential surface of the main body portion. An upper bracket structure has a first through hole in which the main body portion is inserted and restricts passage of the first protrusion. ... Komatsu Ltd

06/08/17 / #20170159262

Hydraulic excavator

Provided is a hydraulic excavator that enables arrangement of a camera at an appropriate position on a lateral edge of a revolving unit. The camera is installed on the lateral edge of the upper surface of the revolving unit. ... Komatsu Ltd

06/01/17 / #20170153649

Work machine control system, work machine, work machine management system, and method for controlling work machine

A work machine control system includes a steering device configured to operate steering wheels of a work machine, a posture detector configured to detect a first azimuth as information on an orientation of the work machine, a steering angle detector configured to detect a steering angle of the steering device, an azimuth calculation unit configured to obtain a second azimuth of the work machine by using the steering angle detected by the steering angle detector, and a vehicle control unit configured to control the steering device by using either the first azimuth or the second azimuth, wherein the first azimuth or the second azimuth is switched to be transmitted to the vehicle control unit.. . ... Komatsu Ltd

06/01/17 / #20170152965

Stroke detection device

A stroke detection device for detecting, along a longitudinal direction, a stroke amount of a spool arranged in a valve main body. The stroke detection device includes: a device main body attached to the valve main body; a detection rod extending along the longitudinal direction of the spool, and movably arranged along the longitudinal direction inside the device main body, in a position where a tip end portion faces an end surface of the spool; a stroke detection unit configured to output a detection signal according to the stroke amount of the detection rod with respect to the device main body; and an attracting unit arranged in the tip end portion of the detection rod, the attracting unit being attracted to the end surface of the spool by magnetic force.. ... Komatsu Ltd

06/01/17 / #20170151946

Mining machine control system, mining machine, mining machine management system, and mining machine management method

A control system of a mining machine controls a driving device that drives a traveling device of the mining machine. The control system includes an acceleration command value calculation unit that calculates an acceleration command value for accelerating the mining machine, a correction value calculation unit that calculates a correction value for the acceleration command value based on a first driving force component of the driving device to cause the mining machine to travel at a target traveling speed and a second driving force component of the driving device to offset a resistance component against traveling of the mining machine, an addition processing unit that calculates a correction acceleration command value by adding the acceleration command value and the correction value, and an acceleration command value output unit that outputs the correction acceleration command value to the driving device.. ... Komatsu Ltd

05/18/17 / #20170138193

Mine management system

A mine management system includes a carrying machine that is loaded with ore and travels from a mining area to an earth removal area in underground of a mine, a loading machine that mines ore in the mining area and loads the ore onto the carrying machine, and a management device that sets a work mode in the underground based on an input signal, and changes a work parameter of the carrying machine and a work parameter of the loading machine.. . ... Komatsu Ltd

05/11/17 / #20170129331

Power transmission device

A power transmission device includes: an axle housing having a central hole where a drive shaft is penetrated; a wheel hub disposed in an outer portion of the axle housing via wheel bearings; a speed-reducer housing chamber provided in the wheel hub to cover an opening end portion of the axle housing; a gear speed reducer, formed inside the speed-reducer housing chamber, to decelerate a rotation of the drive shaft and transmit the rotation to the wheel hub; and a wet-type brake mechanism housed in a brake chamber formed between the axle housing and the wheel hub, and actuated such that braking is applied to a rotation of the wheel hub relative to the axle housing. Further, floating seals are disposed between a lubrication space and the speed-reducer housing chamber, and a circulation passage for oil that includes an oil filter is connected to the lubrication space.. ... Komatsu Ltd

05/04/17 / #20170124862

Construction machine control system, construction machine, construction machine management system, and construction machine control method and program

A construction machine control system (30) includes: a gps receiver (31) that detects a gps position of a dump truck; a laser sensor (24b) that detects a position of an object around the dump truck; and a position measurement controller (33) that detects a position of a vertical projection that protrudes vertically from the surface of the travel route from the detection result of the gps receiver (31) and the detection result of the laser sensor (24b) when the dump truck travels along the travel route and stores the detected position of the vertical projection in a map storage database (36) as map information of the travel route. The position measurement controller (33) determines whether the dump truck is in a state that decreases the accuracy of the map information, continues storing the map information of the travel route in a period in which it is determined that the dump truck is not in the state that decreases the accuracy of the map information, and stops storing the map information of the travel route in a period in which it is determined that the dump truck is in the state that decreases the accuracy of the map information.. ... Komatsu Ltd

05/04/17 / #20170122741

Construction machine control system, construction machine, construction machine management system, and construction machine control method and program

A construction machine control system for a construction machine that travels along a travel route, includes: a position detection unit that detects a position of the construction machine; a determination unit that determines whether an error in the position detected by the position detection unit is equal to or smaller than a predetermined error; a non-contact sensor that detects a position of an object around the construction machine; and a map information storage unit that extracts a detection result related to a vertical projection that protrudes vertically from a detection result of the non-contact sensor and stores the extracted detection result related to the vertical projection as map information when the determination unit determines that the error in the position detected by the position detection unit is equal to or smaller than the predetermined error.. . ... Komatsu Ltd

05/04/17 / #20170121940

Drive device of construction machine

A drive device of a construction machine includes a pump passage connected to a hydraulic pump, first and second supply passages connected to the pump passage, first and second passages connected to the first supply passage, third and fourth passages connected to the second supply passage, a first valve connected to the first and third passages, a second valve connected to the second and fourth passages, a first bucket passage connecting the first passage to a cap-side space of the bucket cylinder through the first valve, a second bucket passage connecting the third passage to a rod-side space of the bucket cylinder through the first valve, a first arm passage connecting the second passage to a rod-side space of an arm cylinder through the second valve, and a second arm passage connecting the fourth passage to a cap-side space of the arm cylinder through the second valve.. . ... Komatsu Ltd








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