Patents Assigned to Komatsu Ltd.
  • Publication number: 20220144163
    Abstract: A work site management system includes: a travel course data acquisition unit that acquires travel course data of an unmanned vehicle which includes course type data indicating a type of an intersection at a work site where the unmanned vehicle travels; and a turn signal control unit that determines whether to normally operate or non-normally operate a direction indicator of the unmanned vehicle based on the course type data.
    Type: Application
    Filed: March 19, 2020
    Publication date: May 12, 2022
    Applicant: Komatsu Ltd.
    Inventors: Takashi Yamamoto, Takashi Hiranaka, Kenta Osagawa
  • Publication number: 20220148424
    Abstract: A management system of a work site includes a command unit that outputs a work command to an unmanned vehicle and a manned vehicle based on input data from a work machine operating at a work site in which the unmanned vehicle and the manned vehicle operate in a mixed manner.
    Type: Application
    Filed: April 2, 2020
    Publication date: May 12, 2022
    Applicant: Komatsu Ltd.
    Inventors: Takashi Hiranaka, Kenta Osagawa
  • Patent number: 11326324
    Abstract: The controller determines whether the vehicle is in a shuttle motion from the operating position of the forward/reverse travel operating member and the actual traveling direction of the vehicle. The controller determines a target braking force when the vehicle is in the shuttle motion. The controller determines at least one of a target displacement of the travel pump and a target displacement of the travel motor based on the target braking force.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: May 10, 2022
    Assignee: KOMATSU LTD.
    Inventor: Takahisa Oasa
  • Patent number: 11326220
    Abstract: A method for producing a machine component excellent in pitting resistance characteristics and toughness includes a carburizing step, performed on a steel material containing 0.13-0.30% C and 0.90-2.00% Cr in mass % and at least one of Si, Mn, Ni, Mo, Nb, V, Ti, B, Al, and N, balance Fe and unavoidable impurities; heating the material to 850-1030° C. to attain carbon concentration in a surface of 0.8-1.5%; cooling the material at an average rate of 5° C./sec or lower from a temperature higher than the Acm point of a surface layer to a cooling end temperature that is at least 50° C. lower than the A1 point to cause the surface layer to have a pearlite or bainite structure with dispersion; spheroidizing annealing at a temperature not higher than the Acm point at the surface layer; heating the material to not higher than the Acm point at the surface layer; and performing tempering.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 10, 2022
    Assignee: KOMATSU LTD.
    Inventors: Kensuke Sato, Koji Yamamoto, Yusuke Hiratsuka, Kazuya Hashimoto
  • Patent number: 11327505
    Abstract: A control apparatus of a work vehicle includes a course data acquisition unit acquiring course data indicating a traveling condition of a work vehicle that includes a travel route, a travel range data acquisition unit acquiring travel range data indicating a travel range of the work vehicle that is defined with a preset travel width based on the travel route, a detection data acquisition unit acquiring detection data of a detection device that has detected a travel direction of the work vehicle, a prediction unit predicting, based on the detection data, a prescribed position distant from a current position of the work vehicle traveling according to the course data, a determination unit determining whether the prescribed position exists within the travel range, and a drive control unit stopping traveling of the work vehicle when it is determined that the prescribed position does not exist within the travel range.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: May 10, 2022
    Assignee: Komatsu Ltd.
    Inventors: Masanori Ogihara, Ryuu Yamamura
  • Publication number: 20220136209
    Abstract: An operator's cab includes an operator's seat provided on a floor surface, a control lever that is provided laterally to the operator's seat and is operated at least toward the operator's seat, and an armrest that includes an upper surface and is provided laterally to the operator's seat in the rear of the control lever. A front portion of the upper surface is larger in width than a rear portion of the upper surface. The front portion of the upper surface includes an inclined portion. With the floor surface being defined as the reference, the inclined portion decreases in height toward the operator's seat.
    Type: Application
    Filed: February 26, 2020
    Publication date: May 5, 2022
    Applicant: KOMATSU LTD.
    Inventors: Hideaki MIYAMOTO, Makoto SASAKI, Hiroaki TANAKA, Norihiro IWAHASHI
  • Publication number: 20220134926
    Abstract: An operator's cab includes an operator's seat provided on a floor surface, a control lever that is provided laterally to the operator's seat and is operated at least in a fore/aft direction, and an armrest that includes an upper surface and is provided laterally to the operator's seat in the rear of the control lever. The upper surface includes a forward inclined portion and a rearward inclined portion in the rear of the forward inclined portion. With the floor surface being defined as the reference, the forward inclined portion decreases in height toward a front end of the upper surface in the fore/aft direction. With the floor surface being defined as the reference, the rearward inclined portion decreases in height toward a rear end of the upper surface in the fore/aft direction.
    Type: Application
    Filed: February 26, 2020
    Publication date: May 5, 2022
    Applicant: KOMATSU LTD.
    Inventors: Hideaki MIYAMOTO, Makoto SASAKI, Hiroaki TANAKA, Norihiro IWAHASHI
  • Publication number: 20220127825
    Abstract: A control system for a construction machine includes a design surface acquisition unit configured to acquire a design surface that indicates a target shape of a construction target, a target value generation unit configured to generate a target value of an amount of control of working equipment, a prediction unit configured to calculate a predicted value of the amount of control of the working equipment based on the target value and a prediction model for the working equipment, and calculate an amount of drive to control the working equipment based on the predicted value and the design surface, and a command unit configured to output a control command for control of the working equipment based on the amount of drive.
    Type: Application
    Filed: December 19, 2019
    Publication date: April 28, 2022
    Applicant: Komatsu Ltd.
    Inventor: Yoshiro Iwasaki
  • Publication number: 20220120059
    Abstract: A control system of a construction machine comprises: a determination unit that determines a control object surface from a first design surface and a second design surface adjacent to the first design surface on the basis of a distance between a tilt bucket and the first design surface and a distance between the tilt bucket and the second design surface; a working equipment control unit that controls a tilt axis of the tilt bucket on the basis of the control object surface determined by the determination unit; and a display control unit that causes a display device to use different display modes to display the control object surface and a surface other than the control object surface.
    Type: Application
    Filed: January 9, 2020
    Publication date: April 21, 2022
    Applicant: Komatsu Ltd.
    Inventor: Toru Matsuyama
  • Publication number: 20220118895
    Abstract: A wheel loader representing a work vehicle includes an operator's seat, an armrest, and a seat operation portion. The armrest is provided lateral to the operator's seat. The seat operation portion controls a position or a posture of the operator's seat. The seat operation portion is attached to the armrest.
    Type: Application
    Filed: October 17, 2019
    Publication date: April 21, 2022
    Applicant: KOMATSU LTD.
    Inventors: Akihiro KOSHI, Masahiko HAMAGUCHI, Hirofumi WADA, Naoki KIMURA
  • Patent number: 11307592
    Abstract: A management system of a work site includes a guidance unit which outputs, to a manned vehicle of a work site, guidance data for guiding the manned vehicle to an unmanned vehicle stopped due to occurrence of an abnormality at the work site.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: April 19, 2022
    Assignee: Komatsu Ltd.
    Inventor: Tsugio Sudou
  • Publication number: 20220114510
    Abstract: A work site management system includes: an entry-prohibited area setting unit that sets an entry-prohibited area to prohibit an entry of a manned transport vehicle at a discharging site in a work site; and a notification unit that notifies the manned transport vehicle of the entry-prohibited area.
    Type: Application
    Filed: March 16, 2020
    Publication date: April 14, 2022
    Applicant: Komatsu Ltd.
    Inventors: Takashi Hiranaka, Kenta Osagawa
  • Patent number: 11299082
    Abstract: A dump body includes: a side plate; a flow path which is provided in the side plate and through which an exhaust gas of an engine flows; an exhaust port of the exhaust gas which is provided in an outer surface of the side plate; and a guide surface which has a first inner end portion and a first outer end portion and is inclined downward toward the first outer end portion, the first inner end portion being connected to an outer surface of the side plate below the exhaust port.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: April 12, 2022
    Assignee: Komatsu Ltd.
    Inventors: Yushi Tanaka, Kengo Aoki
  • Patent number: 11299033
    Abstract: A work machine includes a first cooling unit that protrudes from a first wall surface at a first position of a main flow path and defines a first opening portion between the second wall surface and the first cooling unit; a second cooling unit that protrudes from the second wall surface on a downstream side of the first position in the flow path direction of the main flow path, defines a second opening portion between the first wall surface and the second cooling unit and partly overlaps with the first cooling unit when viewed from the flow path direction; and partition member that defines a first section flow path having the first cooling unit as an inlet and the second opening portion as an outlet and a second section flow path having the first opening portion as an inlet and the second cooling unit as an outlet.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: April 12, 2022
    Assignee: Komatsu Ltd.
    Inventors: Masahiro Ikeda, Kazuya Imamura
  • Patent number: 11299870
    Abstract: A display system for an excavation machine includes a calculator configured to calculate, based on vehicle state data indicating a position and a posture of a vehicle body of an excavation machine, working equipment outer shape data indicating an outer shape and a dimension of working equipment supported by the vehicle body, and working equipment state data indicating a posture of the working equipment, a reference vector extending in a widthwise direction of a bucket of the working equipment and passing through a specified portion of the bucket, and a display controller configured to cause a display device to display the bucket and a target line viewed from a direction orthogonal to the reference vector.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: April 12, 2022
    Assignee: Komatsu Ltd.
    Inventors: Yoshito Kumakura, Satoru Shintani, Daiki Arimatsu
  • Publication number: 20220108243
    Abstract: A work management device includes a present topography acquisition unit which acquires a present topography at a work site, a final design surface acquisition unit which acquires a final design surface at the work site, a work area acquisition unit which acquires a work area of an operation machine at the work site, a target operation volume acquisition unit which acquires a target operation volume per unit time of the operation machine, an intermediate design surface generation unit which generates an intermediate design surface for the operation machine on the basis of the final design surface, the present topography, the work area, and the target operation volume per unit time, and a notification processing unit which notifies the intermediate design surface to an operator of the operation machine.
    Type: Application
    Filed: November 18, 2019
    Publication date: April 7, 2022
    Applicant: Komatsu Ltd.
    Inventors: Chikashi Shike, Takeshi Nakamura
  • Publication number: 20220106764
    Abstract: A control system for a construction machine includes a target value generation unit configured to generate a target value of an amount of control of the working equipment, a prediction model storage unit configured to store a prediction model for the working equipment, a weight data acquisition unit configured to acquire weight data of the bucket, a prediction model update unit configured to update the prediction model based on the weight data, a prediction unit configured to calculate a predicted value of the amount of control of the working equipment based on the target value and the prediction model, and calculate an amount of drive to control the working equipment based on the predicted value, and a command unit configured to output a control command to control the working equipment based on the amount of drive.
    Type: Application
    Filed: December 19, 2019
    Publication date: April 7, 2022
    Applicant: Komatsu Ltd.
    Inventors: Yoshiro Iwasaki, Jun Sasaki
  • Publication number: 20220105953
    Abstract: An unmanned vehicle control system includes: a speed limit calculation unit that calculates a speed limit of an unmanned vehicle based on inclination data of a travel path on the front side of the unmanned vehicle; and a travel control unit that causes the unmanned vehicle to travel based on the speed limit.
    Type: Application
    Filed: March 12, 2020
    Publication date: April 7, 2022
    Applicant: Komatsu Ltd.
    Inventors: Kenta Osagawa, Tomonori Ozaki, Yuji Kobashi
  • Publication number: 20220106773
    Abstract: A control method for a construction machine includes: generating a target value of an amount of control of each of a tilt bucket and a swing body, based on operation data obtained when working equipment and the swing body are operated and a design surface indicating a target shape of a construction target; calculating a predicted value of the amount of control of each of the tilt bucket and the swing body, based on the target values and a prediction model for the construction machine; calculating amounts of drive to control the working equipment and the swing body, based on the predicted values and the design surface to maintain a distance from the tilt bucket to the design surface and an attitude of the tilt bucket; and outputting control commands to control the working equipment and the swing body based on the amounts of drive.
    Type: Application
    Filed: December 19, 2019
    Publication date: April 7, 2022
    Applicant: Komatsu Ltd.
    Inventor: Yoshiro Iwasaki
  • Patent number: 11293164
    Abstract: A wheel loader includes a boom, a forward clutch, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for bringing the forward clutch into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the forward clutch on condition that the wheel loader advances while raising the boom in at least a loaded state.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 5, 2022
    Assignee: KOMATSU LTD.
    Inventors: Ryota Enomoto, Masanori Ikari, Kentaro Yajima, Takuma Nishimura