公开(公告)号：US20220381008A1

公开(公告)日：2022-12-01

申请号：US17773317

申请日：2020-12-02

Applicant: KOMATSU LTD.

Inventor： Shota YAMAWAKI

IPC: E02F9/26 ,  G01G19/08

Abstract: A load in a bucket is accurately weighed. A work machine includes a work implement, an input receiving unit, and a controller. The work implement includes a bucket. The input receiving unit receives a weighing start input for starting to weigh the load in the bucket. When the input receiving unit receives the weighing start input, the controller determines whether an automatic weighing start condition is satisfied or not. The automatic weighing start condition includes a condition that the work implement is not performing an excavation work. When the automatic weighing start condition is satisfied, the controller controls an operation of the work implement to weigh the load in the bucket.

公开(公告)号：US20230129066A1

公开(公告)日：2023-04-27

申请号：US17802996

申请日：2021-03-18

Applicant: KOMATSU LTD.

Inventor： Shota YAMAWAKI

IPC: E02F3/43

Abstract: A wheel loader includes a vehicle body, a work implement, a bucket-to-ground angle detection section, and a control section. The work implement operates with respect to the vehicle body and includes a bucket or a fork. The bucket-to-ground angle detection section detects information on a tilt angle of the bucket or the fork with respect to a gravity direction. The control section controls the tilt angle of the bucket or the fork with respect to the gravity direction based on a detection value of the bucket-to-ground angle detection section.

公开(公告)号：US20220389688A1

公开(公告)日：2022-12-08

申请号：US17776250

申请日：2020-12-02

Applicant: KOMATSU LTD.

Inventor： Shota YAMAWAKI

IPC: E02F9/26 ,  E02F3/43

Abstract: A load in a bucket is weighed accurately in a short time period. A work machine includes a bucket and a controller. The controller determines a period in which a parameter related to a load weight in the bucket fluctuates with respect to time. The controller averages load weights at a plurality of time points within the period to calculate an average load weight.

公开(公告)号：US20220106763A1

公开(公告)日：2022-04-07

申请号：US17426399

申请日：2020-03-18

Applicant: KOMATSU LTD.

Inventor： Shota YAMAWAKI ,  Shogo MIYAZAKI

IPC: E02F3/43 ,  E02F3/28 ,  E02F9/22 ,  E02F3/42

Abstract: A work machine includes a boom, a work tool configured to drive with respect to the boom, an actuator configured to drive the work tool, a sub-link attached to the boom, and a control section. The sub-link is configured to transmit driving force of the actuator to the work tool. The control section is configured to control the actuator based on a posture of the sub-link with respect to the boom. A method of controlling a work machine includes controlling an actuator based on a posture of a sub-link with respect to a boom, the sub-link being configured to transmit driving force of the actuator to a work tool configured to drive with respect to the boom.

公开(公告)号：US20210372089A1

公开(公告)日：2021-12-02

申请号：US17289423

申请日：2019-11-07

Applicant: KOMATSU LTD.

Inventor： Kenichi YAMADA ,  Shogo MIYAZAKI ,  Akira TAKENO ,  Shota YAMAWAKI

IPC: E02F9/22 ,  E02F9/20 ,  F16H61/4008 ,  F16H61/4157 ,  F16H61/472 ,  F15B15/18 ,  F04D13/02 ,  F04D15/00

Abstract: A control device for a power machine includes a target circuit pressure specifying unit configured to specify a target circuit pressure of the hydrostatic continuously variable transmission, a measurement value acquisition unit configured to acquire an actual circuit pressure of the hydrostatic continuously variable transmission, a brake torque determination unit configured to determine a brake torque based on the target circuit pressure and the actual circuit pressure, and a pump control unit configured to control the hydraulic pump based on the brake torque. The brake torque is a torque consumed by the hydraulic pump.

公开(公告)号：US20240167247A1

公开(公告)日：2024-05-23

申请号：US18283595

申请日：2022-01-24

Applicant: KOMATSU LTD.

Inventor： Minoru SHIMIZU ,  Shota YAMAWAKI ,  Motoki KOYAMA

IPC: E02F9/20 ,  E02F9/26

CPC classification number: E02F9/2029 ,  E02F9/265

Abstract: A hydraulic excavator includes a vehicular body, a boom bottom pin supported by the vehicular body, a boom rotatably coupled to the vehicular body by the boom bottom pin, a boom top pin attached to a tip end of the boom, an arm rotatably coupled to the boom by the boom top pin, an arm top pin attached to a tip end of the arm, and a bucket rotatably coupled to the arm by the arm top pin. The computing device calculates a weight of a load conveyed by a work implement based on any two equilibrium equations of an equation of moment equilibrium around the boom bottom pin, an equation of moment equilibrium around the boom top pin, and an equation of moment equilibrium around the arm top pin.

公开(公告)号：US20240159022A1

公开(公告)日：2024-05-16

申请号：US17773270

申请日：2020-12-02

Applicant: KOMATSU LTD.

Inventor： Shota YAMAWAKI

IPC: E02F9/26 ,  E02F3/43

CPC classification number: E02F9/264 ,  E02F3/431

Abstract: A boom is attached to a machine main body. A bucket is attached to the boom. A boom cylinder is attached to the machine main body and drives the boom. A bucket cylinder is attached to the machine main body and drives the bucket with respect to the boom. A controller calculates a mass of a load within the bucket based on boom cylinder force and bucket cylinder force.

公开(公告)号：US20240151008A1

公开(公告)日：2024-05-09

申请号：US17773294

申请日：2020-12-02

Applicant: KOMATSU LTD.

Inventor： Shota YAMAWAKI ,  Yuita TAKENAKA

IPC: E02F9/26 ,  E02F3/28 ,  G01G19/12

CPC classification number: E02F9/26 ,  E02F3/283 ,  G01G19/12

Abstract: A running wheel is attached to a machine main body. A boom is attached to the machine main body. A bucket is attached to the boom. A boom cylinder is attached to the machine main body and drives the boom. A controller calculates a mass of a load within the bucket based on boom cylinder force of the boom cylinder and a ground acceleration of a wheel loader.

公开(公告)号：US20220098834A1

公开(公告)日：2022-03-31

申请号：US17426364

申请日：2020-03-18

Applicant: KOMATSU LTD.

Inventor： Shota YAMAWAKI ,  Shogo MIYAZAKI

IPC: E02F9/26

Abstract: A work machine includes a main body, a boom to drive with respect to the main body, a work tool connecting to the boom, the work tool to drive with respect to the boom, an actuator connecting to the main body and the work tool, the actuator to drive the work tool, and a sub-link to transmit drive of the actuator to the work tool. A method for calibrating the work machine includes outputting a detection value to detect an angle of the sub-link with respect to the boom in a predetermined posture of the boom and a work tool posture, converting the detection value as a measurement angle of the sub-link with respect to the boom based on a conversion value, and calibrating the conversion value based on a relationship between the measurement angle and an actual angle in the work tool posture which is specified.