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公开(公告)号：US20200299929A1
公开(公告)日：2020-09-24
申请号：US16086123
申请日：2017-06-19
Applicant: KOMATSU LTD.
Inventor： Kenji OHIWA , Tomohiro NAKAGAWA
Abstract: A work vehicle includes a traveling unit, a revolving unit disposed on an upper side of the traveling unit, a work implement disposed on the revolving unit, a revolving driver that revolves the revolving unit, a receiver, an end position setting component, a revolution position sensor, and a drive controller. The receiver directly or indirectly receives information related to a position of an object serving as a target of a revolution of the revolving unit, from the object. The end position setting component sets an end position of a revolution of the revolving unit based on information related to the position of the object. The revolution position sensor senses a revolution position of the revolving unit during a revolution. The drive controller controls the revolving driver based on the revolution position to revolve the revolving unit from a start position of a revolution to the end position.
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公开(公告)号：US20180363273A1
公开(公告)日：2018-12-20
申请号：US16060169
申请日：2017-01-20
Applicant: KOMATSU LTD.
Inventor： Kenji OHIWA , Masao YAMAMURA , Tomohiro NAKAGAWA , Makoto SASAKI , Masashi KATOU
Abstract: A work vehicle includes: a work implement; a cab having a front pillar located at the work implement side; a display unit provided along the front pillar, the display unit being configured to display work assistance information to be overlaid on an actual view of a work site; a display unit provided along the front pillar at a position different from the display unit, the display unit being configured to display work assistance information to be overlaid on the actual view of the work site; and a display controller configured to control displaying on the display units.
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公开(公告)号：US20190078300A1
公开(公告)日：2019-03-14
申请号：US15757085
申请日：2017-01-10
Applicant: KOMATSU LTD.
Inventor： Yuki SHIMANO , Takuya SONODA , Kenji OHIWA
Abstract: A work vehicle includes: a hydraulic operation apparatus for operating an actuator; a main controller configured to generate a command current in accordance with an amount of operation of the operation apparatus; an electromagnetic proportional control valve configured to generate command pilot pressure in accordance with the command current; and a main valve configured to adjust a flow rate of hydraulic oil for operating the actuator based on the command pilot pressure. The electromagnetic proportional control valve is provided in a pilot oil passage that connects a pilot pump and a main valve, and configured to utilize hydraulic pressure supplied from the pilot pump to generate command pilot pressure. The operation apparatus is provided in an operation apparatus oil passage that is different from the pilot oil passage.
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公开(公告)号：US20180373032A1
公开(公告)日：2018-12-27
申请号：US16062157
申请日：2016-11-29
Applicant: KOMATSU LTD.
Inventor： Kenji OHIWA , Masao YAMAMURA , Tomohiro NAKAGAWA
Abstract: A work vehicle includes: a main body having a cab; a display device provided in the cab and configured to display work assistance information to be overlaid on an actual view of a work site; a display controller configured to cause the work assistance information to be displayed on the display device; and a bucket position detector configured to detect a position of a bucket relative to the main body. The display controller is configured to cause a display position of the work assistance information on the display device to follow a movement of the bucket. The display controller is configured to change a display manner of the work assistance information on the display device based on the position detected by the bucket position detector, when the bucket is moved relative to the cab in a forward direction and a rearward direction.
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公开(公告)号：US20220316174A1
公开(公告)日：2022-10-06
申请号：US17618954
申请日：2020-06-30
Applicant: KOMATSU LTD.
Inventor： Tomoki KONDA , Takeshi OI , Kenjiro SHIMADA , Kenji OHIWA
Abstract: A work machine comprises: a work implement; a hydraulic cylinder; a hydraulic pump that supplies the hydraulic oil to the hydraulic cylinder via a hydraulic circuit; a relief valve that can set a relief pressure of the hydraulic circuit to either a first set pressure or a second set pressure higher than the first set pressure; a detection unit that detects at least one of a pressure of the hydraulic oil in the hydraulic circuit and a speed of the work implement; and a relief pressure changing unit that changes a relief pressure of the relief valve from the first set pressure to the second set pressure based on a detection value of at least one of the pressure of the hydraulic oil in the hydraulic circuit and the speed of the work implement when the controlled state of the work implement is the excavation state.
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Patent Agency Ranking
公开(公告)号：US20200263395A1
公开(公告)日：2020-08-20
申请号：US16061458
申请日：2016-11-29
Applicant: KOMATSU LTD.
Inventor： Kenji OHIWA , Masao YAMAMURA , Tomohiro NAKAGAWA
Abstract: A work vehicle includes: a display device provided in a cab and configured to display work assistance information to be overlaid on an actual view of a work site; a bucket position detector configured to detect a position of a bucket; and a display controller configured to control a content to be displayed on the display device and configured to cause the work assistance information to be displayed around the bucket while causing the work assistance information to follow the movement of the bucket based on the detected position. When work assistance information becomes close to a boundary of a display area of the display device due to the movement of the bucket, the display controller is configured to cause the work assistance information to be displayed on the display device with a relative position between the work assistance information and the bucket in the display area being changed.
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公开(公告)号：US20200232181A1
公开(公告)日：2020-07-23
申请号：US16652820
申请日：2019-01-22
Applicant: KOMATSU LTD.
Inventor： Kenji OHIWA , Tomohiro NAKAGAWA , Ryuji KANDA
Abstract: A work implement includes a breaker. Sensors detect an attitude of the work implement. A pilot valve controls the operation of the breaker. A controller controls the pilot valve. The controller detects, from the attitude of the work implement obtained by the sensors, a distance between a tip of the breaker and a striking limit. When it is determined that the tip of the breaker has reached the striking limit, the controller controls the pilot valve to stop the operation of the breaker.
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公开(公告)号：US20180371724A1
公开(公告)日：2018-12-27
申请号：US16064635
申请日：2016-11-29
Applicant: KOMATSU LTD.
Inventor： Kenji OHIWA , Masao YAMAMURA , Tomohiro NAKAGAWA
Abstract: A work vehicle includes a work implement, a main body, a display device, and a display controller. To the main body, the work implement is attached, and the main body has a cab. The display device is provided in the cab and configured to overlay and thus display work assistance information on an actual view of a work site. The display controller causes the display device to display target design topography as work assistance information. When a work starts, the display controller causes the display device to display final target design topography that is achieved after the work is completed, and subsequently, switches to displaying target design topography to be achieved depending on a working step performed.
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公开(公告)号：US20180355586A1
公开(公告)日：2018-12-13
申请号：US16060111
申请日：2016-11-29
Applicant: KOMATSU LTD.
Inventor： Kenji OHIWA , Masao YAMAMURA , Tomohiro NAKAGAWA
CPC classification number: E02F9/26 , E02F9/2004
Abstract: A work vehicle includes a work implement, a main body, a bucket position detector, a display device, and a display controller. The work implement has a bucket. To the main body, the work implement is attached, and the main body has a cab. The bucket position detector detects a position of the bucket. The display device is provided in the cab and configured to overlay and thus display work assistance information on an actual view of a work site. The display controller is configured to change displaying of the work assistance information on the display device based on a distance between the position of the bucket detected by the bucket position detector and design topography.
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公开(公告)号：US20180355585A1
公开(公告)日：2018-12-13
申请号：US15781802
申请日：2016-11-29
Applicant: KOMATSU LTD.
Inventor： Kenji OHIWA , Masao YAMAMURA , Tomohiro NAKAGAWA
IPC: E02F9/26
Abstract: A work vehicle includes: a work implement having a bucket; a main body to which the work implement is attached, and having a cab; a display device provided in the cab and configured to overlay and thus display work assistance information on an actual view of a work site; a bucket teeth position calculator configured to calculate a position of teeth of the bucket of the work implement in an available display area of the display device; and a following process unit configured to display the work assistance information to follow movement of the bucket of the work implement in the available display area of the display device only at a position above the position of the teeth of the bucket of the work implement as calculated by the bucket teeth position calculator.
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