公开(公告)号：US20240410131A1

公开(公告)日：2024-12-12

申请号：US18702910

申请日：2022-10-07

Applicant: KOMATSU LTD.

Inventor： Osamu YATSUDA ,  Takuma SAKAMOTO

IPC: E02F9/08 ,  E02F3/76 ,  E02F3/80 ,  E02F9/16

Abstract: A work machine comprises a vehicular body having a first foothold and a traveling apparatus attached to the vehicular body. The traveling apparatus has a crawler belt. The first foothold is disposed above the crawler belt and has a working deck. The vehicular body is provided with at least one liquid replenishing port (e.g., at least one of a first liquid replenishing port, a second liquid replenishing port, and a third liquid replenishing port). In a top view of the work machine, at least one liquid replenishing port is disposed in an area of the vehicular body inner than the working deck.

公开(公告)号：US20210395982A1

公开(公告)日：2021-12-23

申请号：US17289759

申请日：2020-01-20

Applicant: KOMATSU LTD.

Inventor： Koichi NAKAZAWA ,  Osamu YATSUDA

IPC: E02F9/26 ,  G01S7/51 ,  G01S17/89 ,  G01S17/931 ,  G01S17/08

Abstract: A system includes a processor and a display. A LiDAR is attached to a work machine and includes a laser and a photodetector. The LiDAR measures a distance to at least a part of a work implement and a distance to an object around the work machine. The processor acquires position data from the distances measured by the LiDAR. The position data indicates a position of at least the part of the work implement and a position of the object around the work machine. The processor generates an image indicative of the position of at least the part of the work implement and the object around the work machine based on the position data. The display displays an image in response to a signal from the processor. The system may further include the work machine and the LiDAR.

公开(公告)号：US20240101192A1

公开(公告)日：2024-03-28

申请号：US18253842

申请日：2021-12-15

Applicant: KOMATSU LTD.

Inventor： Takeshi YOSHIKAWA ,  Hiroaki TAKESHIMA ,  Naoya AKIYAMA ,  Kazushi NAKATA ,  Osamu YATSUDA ,  Shinichi OTAKA ,  Yuji NAMEKI ,  Ryoichi NAGASAKA ,  Takaomi KOMURA

IPC: B62D11/18 ,  E02F9/22

CPC classification number: B62D11/183 ,  E02F9/225

Abstract: In a crawler type work machine, when switching from a pivot turning mode to a straight travel mode or a slow turning mode, a controller is configured to maintain a rotation speed of the turning motor until after a first timing at which the inside steering clutch begins partial engagement.

公开(公告)号：US20210404151A1

公开(公告)日：2021-12-30

申请号：US17289676

申请日：2020-01-20

Applicant: KOMATSU LTD.

Inventor： Koichi NAKAZAWA ,  Osamu YATSUDA

IPC: E02F9/26 ,  B60R11/04 ,  G06K9/00

Abstract: A system includes a processor and a display. The processor acquires shape data indicative of a shape of the surroundings in a traveling direction of a work machine. The processor generates a guide line. The guide line is disposed spaced from the work machine. The guide line indicates the shape of the surroundings in the traveling direction of the work machine. The processor synthesizes a surrounding image and the guide line and generates an image including the surroundings image and the guide line. The display displays the image including the surroundings image and the guide line based on a signal from the processor. The system may further include the work machine, a camera that captures the surrounding image, and a sensor that measures the shape of surroundings.

公开(公告)号：US20250012043A1

公开(公告)日：2025-01-09

申请号：US18710308

申请日：2022-12-27

Applicant: KOMATSU LTD.

Inventor： Takeshi YOSHIKAWA ,  Hiroaki TAKESHIMA ,  Naoya AKIYAMA ,  Shinichi OTAKA ,  Kazushi NAKATA ,  Osamu YATSUDA

IPC: E02F3/84 ,  E02F9/02 ,  E02F9/20 ,  E02F9/22 ,  F15B13/06 ,  F15B15/18 ,  E02F3/76

Abstract: A crawler-type work machine includes left and right steering brakes configured to brake left and right output shafts, a turning motor configured to produce a rotation speed difference between the left and right output shafts, work implement cylinders configured to drive a work implement attached to a vehicle body, a hydraulic pressure supply unit configured to supply hydraulic fluid to the turning motor and the work implement cylinders, and a controller configured to control the hydraulic pressure supply unit. The controller is configured to execute a hydraulic fluid amount control in order to reduce the hydraulic fluid amount supplied from the hydraulic pressure supply unit to the turning motor when the work implement cylinders are driven while the turning motor is rotating.

公开(公告)号：US20240101199A1

公开(公告)日：2024-03-28

申请号：US18362173

申请日：2023-07-31

Applicant: KOMATSU LTD.

Inventor： Souichirou MURAKAMI ,  Hirofumi KOTAKI ,  Daisuke OKAMOTO ,  Kouji NAGAMI ,  Yohei TAKAHASHI ,  Osamu YATSUDA ,  Hironori YAMAMITSU

IPC: B62D33/06 ,  B62D27/04

CPC classification number: B62D33/0604 ,  B62D27/04 ,  B60R21/13

Abstract: A work vehicle includes a vehicle body frame, a cab disposed on an upper side of the vehicle body frame, brackets connected to the cab, limiting sections and buffering devices. The limiting sections are disposed between the brackets and the vehicle body frame. The limiting sections limit a movement range of the cab with respect to the vehicle body frame. The buffering devices are disposed between the brackets and the vehicle body frame.

公开(公告)号：US20240001989A1

公开(公告)日：2024-01-04

申请号：US18253830

申请日：2021-12-03

Applicant: KOMATSU LTD.

Inventor： Takeshi YOSHIKAWA ,  Hiroaki TAKESHIMA ,  Naoya AKIYAMA ,  Toshikazu OKADA ,  Kazushi NAKATA ,  Osamu YATSUDA

IPC: B62D11/18 ,  B62D11/08 ,  E02F9/22

CPC classification number: B62D11/18 ,  B62D11/08 ,  E02F9/2267

Abstract: A controller of a crawler type work machine controls left and right steering clutches, left and right steering brakes, and a turning motor to cause the crawler type work machine to turn in either a slow turning mode or a pivot turning mode. The controller executes a hydraulic fluid amount control to reduce a hydraulic fluid amount supplied from a hydraulic pressure supply unit to the turning motor and to increase the hydraulic fluid amount supplied from the hydraulic pressure supply unit from the hydraulic pressure supply unit to the work implement cylinder when the work implement cylinder is driven while the turning motor is being rotated.

公开(公告)号：US20210395980A1

公开(公告)日：2021-12-23

申请号：US17289766

申请日：2020-01-20

Applicant: KOMATSU LTD.

Inventor： Koichi NAKAZAWA ,  Osamu YATSUDA

IPC: E02F9/26 ,  H04N5/265 ,  H04N7/18 ,  B60R1/00

Abstract: A system includes a processor and a display. A plurality of cameras capture surroundings images of a work machine. The processor acquires image data indicative of the surroundings images. The processor synthesizes the surroundings images and generates a panorama moving image from viewpoints that move around the work machine. The display displays, based on a signal from the processor, the panorama moving image from the viewpoints that move around the work machine. The system may include the cameras and the work machine.

公开(公告)号：US20240010273A1

公开(公告)日：2024-01-11

申请号：US18253617

申请日：2021-11-05

Applicant: KOMATSU LTD.

Inventor： Takeshi YOSHIKAWA ,  Hiroaki TAKESHIMA ,  Naoya AKIYAMA ,  Toshikazu OKADA ,  Kazushi NAKATA ,  Osamu YATSUDA

IPC: B62D11/08 ,  B62D5/04

CPC classification number: B62D11/08 ,  B62D5/0478 ,  B62D5/046

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.

公开(公告)号：US20240001988A1

公开(公告)日：2024-01-04

申请号：US18253633

申请日：2021-11-05

Applicant: KOMATSU LTD.

Inventor： Takeshi YOSHIKAWA ,  Hiroaki TAKESHIMA ,  Naoya AKIYAMA ,  Kazushi NAKATA ,  Osamu YATSUDA ,  Shinichi OTAKA ,  Yuji NAMEKI ,  Ryouichi NAGASAKA ,  Takaomi KOMURA

IPC: B62D11/08 ,  B62D11/00 ,  B62D11/12

CPC classification number: B62D11/08 ,  B62D11/001 ,  B62D11/12 ,  E02F9/225

Abstract: A controller provided in a bulldozer maintains the engagement of an inside steering clutch over a predetermined period beginning from a switching start point at which switching starts, when switching from a slow turn mode to a pivot turn mode, and when switching from the pivot turn mode to the slow turn mode, maintains the braking of an inside steering brake over a predetermined period beginning from a switching start point at which the switching starts.