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公开(公告)号：US20170107688A1
公开(公告)日：2017-04-20
申请号：US15101106
申请日：2015-10-16
Applicant: KOMATSU LTD.
Inventor： Yuto FUJII , Tsutomu IWAMURA , Masanobu SEKI
CPC classification number: E02F3/3681 , E02F3/32 , E02F3/3677 , E02F3/40 , E02F3/435 , E02F9/264 , E02F9/265 , G01B21/02 , G01C15/12 , G01S19/45
Abstract: A hydraulic excavator is equipped with a bucket, a tilt cylinder, a fourth stroke sensor, and a bucket information computing unit. The bucket is able to rotate about the center of a tilt axis. The tilt cylinder causes the bucket to rotate about the center of the tilt axis. The fourth stroke sensor detects a stroke length of the tilt cylinder. The bucket information computing unit obtains a tilt angle of the bucket on the basis of the stroke length detected by the fourth stroke sensor.
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公开(公告)号：US20250137224A1
公开(公告)日：2025-05-01
申请号：US18683609
申请日：2022-09-29
Applicant: Komatsu Ltd.
Inventor： Hikaru SUZUKI , Tsutomu IWAMURA , Sho NOZAKI , Ryuji KANDA , Daishi IWANAGA , Tomokazu HIRAO , Yuta UCHIDA , Yuki SHIMANO , Jun SASAKI , Jin KITAJIMA
Abstract: A measurement value acquisition unit acquires measurement values from a plurality of sensors. A posture calculation unit calculates a posture of an attachment with respect to a vehicle body based on the measurement values. An intervention control unit determines a virtual rotation axis based on the calculated posture of the attachment. An operation signal acquisition unit acquires an operation signal for operating the support portion from an operation device. An intervention control unit generates a control signal for the tilt rotator to rotate the attachment around the virtual rotation axis so that an axial direction of the virtual rotation axis in a global coordinate system is held and a design surface and teeth of the attachment are approximately parallel to each other, based on the calculated posture of the attachment and an operation amount indicated by the operation signal for operating the support portion. An output unit outputs the generated control signal.
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公开(公告)号：US20250116085A1
公开(公告)日：2025-04-10
申请号：US18684009
申请日：2022-09-29
Applicant: Komatsu Ltd.
Inventor： Hikaru SUZUKI , Tsutomu IWAMURA , Sho NOZAKI , Ryuji KANDA , Daishi IWANAGA , Tomokazu HIRAO , Yuta UCHIDA , Yuki SHIMANO , Jun SASAKI , Jin KITAJIMA
Abstract: A measurement value acquisition unit acquires measurement values from a plurality of sensors. A posture calculation unit calculates a posture of an attachment with respect to a vehicle body based on the measurement values. An operation signal acquisition unit acquires an operation signal from an operation device. An intervention control unit generates a control signal for the tilt rotator so that the posture of the attachment is held, based on the operation signal. An output unit outputs the generated control signal.
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Patent Agency Ranking
公开(公告)号：US20180283418A1
公开(公告)日：2018-10-04
申请号：US15562919
申请日：2016-11-09
Applicant: KOMATSU LTD.
Inventor： Atsushi ISHIDA , Yuto FUJII , Tsutomu IWAMURA , Haruki NISHIGUCHI
CPC classification number: F15B19/002 , E02F3/32 , E02F3/435 , E02F9/2228 , E02F9/2267 , E02F9/2285 , E02F9/2296 , E02F9/264 , F15B11/04 , F15B13/043
Abstract: A work vehicle includes a work implement, a valve adjusting a flow rate of a hydraulic oil operating the work implement, an electromagnetic proportional control valve generating a pilot pressure guided to the valve, a controller outputting a current to the electromagnetic proportional control valve, and a sensor for detecting an operation of the work implement. The controller increases stepwise a current value of a current output to the electromagnetic proportional control valve by repeating processing for temporarily lowering a current value of the current output to the electromagnetic proportional control valve and thereafter outputting to the electromagnetic proportional control valve, a current having a current value greater than the current value before lowering. The controller calibrates data for predicting an operation speed of the work implement based on a result of detection by the sensor at the time when the current value is increased stepwise.
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公开(公告)号：US20250129578A1
公开(公告)日：2025-04-24
申请号：US18685062
申请日：2022-09-29
Applicant: Komatsu Ltd.
Inventor： Hikaru SUZUKI , Tsutomu IWAMURA , Sho NOZAKI , Ryuji KANDA , Daishi IWANAGA , Tomokazu HIRAO , Yuta UCHIDA , Yuki SHIMANO , Jun SASAKI , Jin KITAJIMA
Abstract: A measured value acquisition unit acquires measured values from a plurality of sensors. A position and posture calculation unit calculates a current posture of the work tool, based on the measured values. A target posture determination unit determines a virtual rotation axis, based on the calculated current posture of the work tool, when a predetermined control start condition is satisfied. A rotation amount calculation unit generates a control signal of the tilt rotator for rotating the work tool from the current posture to a target posture by a predetermined amount around the virtual rotation axis. A control signal output unit outputs the generated control signal.
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公开(公告)号：US20240352702A1
公开(公告)日：2024-10-24
申请号：US18683740
申请日：2022-09-29
Applicant: Komatsu Ltd.
Inventor： Hikaru SUZUKI , Tsutomu IWAMURA , Sho NOZAKI , Ryuji KANDA , Daishi IWANAGA , Tomokazu HIRAO , Yuta UCHIDA , Yuki SHIMANO , Jun SASAKI , Jin KITAJIMA
CPC classification number: E02F3/3681 , E02F3/43 , E02F9/264
Abstract: A measurement value acquisition unit acquires measurement values from a plurality of sensors. A posture calculation unit calculates a posture of an attachment with respect to a vehicle body. An intervention control unit determines a virtual rotation axis based on the calculated posture of the attachment. An intervention control unit generates a control signal for the tilt rotator to rotate the attachment around the virtual rotation axis so that a design surface and teeth of the attachment are approximately parallel to each other, based on the calculated posture of the attachment. An output unit outputs the generated control signal.
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7.发明申请公开(公告)号：US20180171598A1
公开(公告)日：2018-06-21
申请号：US15574951
申请日：2015-10-28
Applicant: KOMATSU LTD.
Inventor： Tsutomu IWAMURA , Masanobu SEKI , Masashi ICHIHARA , Kenjiro SHIMADA , Satoru SHINTANI , Yuki SHIMANO , Eiji ISHIBASHI
CPC classification number: E02F9/268 , E02F3/434 , E02F3/435 , E02F3/844 , E02F9/2004 , E02F9/2029 , E02F9/2296 , E02F9/264 , E02F9/265
Abstract: 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.
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公开(公告)号：US20170167116A1
公开(公告)日：2017-06-15
申请号：US15100720
申请日：2015-12-09
Applicant: KOMATSU LTD.
Inventor： Yuto FUJII , Tsutomu IWAMURA , Daiki ARIMATSU , Katsuhiro IKEGAMI , Masanobu SEKI
IPC: E02F9/26
CPC classification number: E02F9/264 , E02F3/32 , E02F3/3681 , E02F3/425 , E02F9/265
Abstract: 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. The bucket information computing unit obtains a tilt angle of the bucket based on the stroke length on the basis of the tilt cylinder disposition data.
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