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公开(公告)号：US20190078291A1
公开(公告)日：2019-03-14
申请号：US15757096
申请日：2017-04-10
申请人： KOMATSU LTD.
发明人： Yuki SHIMANO , Toru MATSUYAMA , Takuya SONODA
摘要： An earthmoving machine includes a work implement, a distance calculation unit, and a hydraulic cylinder control unit. The work implement includes a boom, an arm, and a bucket. The distance calculation unit calculates a distance between a monitoring point in the bucket and design topography representing an aimed shape of a land grading target. The hydraulic cylinder control unit outputs a command signal for lowering the boom when the distance between the monitoring point and the design topography is equal to or smaller than a prescribed value and when the bucket is expected to move in such a direction that the monitoring point moves away from the design topography as a result of an operation of the arm.
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公开(公告)号：US20240253699A1
公开(公告)日：2024-08-01
申请号：US18560455
申请日：2022-06-15
申请人： KOMATSU LTD.
发明人： Takuya SONODA , Takashi MAEDA , Yoshihide NAKAE
摘要： A work machine includes a vehicle body, a steering control wheel, a first actuator, a second actuator, a steering angle sensor, a leaning angle sensor, and a controller. The steering control wheel is supported by the vehicle body. The first actuator changes a steering angle of the steering control wheel. The second actuator changes a leaning angle of the steering control wheel. The steering angle sensor outputs a first angle signal indicative of the steering angle. The leaning angle sensor outputs a second angle signal indicative of the leaning angle. The controller acquires the first angle signal and the second angle signal, acquires the steering angle based on the first angle signal, acquires the leaning angle based on the second angle signal, acquires a target leaning angle corresponding to the steering angle, and controls the second actuator so that the leaning angle becomes the target leaning angle.
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公开(公告)号：US20240247466A1
公开(公告)日：2024-07-25
申请号：US18560484
申请日：2022-06-15
申请人： KOMATSU LTD.
发明人： Takuya SONODA , Takashi MAEDA , Yoshihide NAKAE
CPC分类号： E02F9/225 , E02F9/0841 , E02F9/2203 , E02F9/2285 , E02F9/2292
摘要： A work machine includes a vehicle body, a steering control wheel, an actuator, and a controller. The vehicle body includes a rear frame and a front frame coupled to the rear frame so as to turn with respect to the rear frame. The steering control wheel is supported by the front frame. The actuator changes a steering angle of the steering control wheel. The controller controls the actuator. The controller determines a target direction in which the vehicle body travels, acquires an articulate angle of the front frame with respect to the rear frame, and sets the steering angle so that the vehicle body moves in the target direction by controlling the actuator in accordance with the articulate angle.
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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
申请人： KOMATSU LTD.
发明人： Yuki SHIMANO , Takuya SONODA , Kenji OHIWA
摘要： 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：US20240352706A1
公开(公告)日：2024-10-24
申请号：US18553257
申请日：2022-05-10
申请人： KOMATSU LTD.
发明人： Takuya SONODA , Yoshihide NAKAE , Takashi MAEDA
CPC分类号： E02F3/844 , E02F3/764 , E02F9/2004 , E02F3/7645 , E02F3/765 , E02F9/2203
摘要： A work machine includes a vehicle body, a work implement movably connected to the vehicle body, a plurality of actuators that are connected to the work implement and change an orientation of the work implement with respect to the vehicle body, an operating device that is operable to change the orientation of the work implement, a sensor that detects the orientation of the work implement, and a controller. The controller acquires a current orientation of the work implement, determines a target orientation of the work implement corresponding to an operation of the operating device, determines respective target stroke lengths of the plurality of actuators so that the work implement assumes the target orientation from the current orientation with a combination of stroke motions of the plurality of actuators, and controls the plurality of actuators based on the target stroke lengths.
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公开(公告)号：US20240295096A1
公开(公告)日：2024-09-05
申请号：US18571972
申请日：2022-07-27
申请人： KOMATSU LTD.
发明人： Ken NISHIHARA , Eiji ISHIBASHI , Takuya SONODA
摘要： A system includes a work implement sensor attached to a work implement to detect work implement roll and pitch angles, and a controller. The controller acquires an actual frame length, a position of the first body connecting portion, and the roll and pitch angles. The controller calculates an assumed position of the first frame connecting portion when the yaw angle is assumed to be a predetermined angle based on the roll and pitch angles in the first posture, an assumed frame length indicating a distance between the assumed position of the first frame connecting portion and the first body connecting portion, the yaw angle of the work implement in the first posture based on a difference between the actual and assumed frame lengths, and a position of the predetermined portion of the work implement based on the roll, pitch and yaw angles of the work implement in the first posture.
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公开(公告)号：US20240229419A1
公开(公告)日：2024-07-11
申请号：US18558284
申请日：2022-05-18
申请人： KOMATSU LTD.
发明人： Takuya SONODA , Takashi MAEDA , Yoshihide NAKAE , Yasuhisa ASANO , Takeo MURATA
CPC分类号： E02F9/2087 , E02F3/76
摘要： A work machine including a vehicle body, a traveling wheel, first and second steering members, an actuator, first and second operation sensors that output operation signals indicative of operation of the first and second steering members, and a controller. The controller acquires the first and second operation signals. The controller determines whether or not the first steering member is being operated, and whether the first steering member was operated last. The controller performs an automatic control of the actuator to set the steering angle to a target angle upon determining that the first steering member is not being operated and the first steering member was operated last. The controller does not perform the automatic control upon determining that the second steering member was operated last even if the first steering member is not being operated.
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公开(公告)号：US20180274210A1
公开(公告)日：2018-09-27
申请号：US15540596
申请日：2016-11-09
申请人： KOMATSU LTD.
发明人： Minetaka NISHIMURA , Yuki SHIMANO , Takuya SONODA
摘要： A hydraulic excavator has a boom, an arm, a bucket, and a boom cylinder which drives the boom. A load value within the bucket is computed based on a load of the boom cylinder, and the load value obtained by computing is corrected based on an acceleration of extension/retraction of the boom cylinder.
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公开(公告)号：US20240337089A1
公开(公告)日：2024-10-10
申请号：US18681971
申请日：2022-08-29
申请人： KOMATSU LTD.
发明人： Takuya SONODA , Yoshihide NAKAE , Takashi MAEDA
CPC分类号： E02F3/847 , E02F9/2004 , E02F9/2041 , E02F9/2203
摘要： A controller acquires vehicle body posture data. The controller acquires work implement posture data. The controller calculates a height of a work implement in a gravity direction from a reference point of a vehicle body based on the vehicle body posture data and the work implement posture data. The controller controls an actuator so that the height of the work implement in the gravity direction is maintained even when a posture of the vehicle body changes.
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公开(公告)号：US20240301657A1
公开(公告)日：2024-09-12
申请号：US18284163
申请日：2022-01-19
申请人： KOMATSU LTD.
CPC分类号： E02F9/2045 , E02F9/26
摘要： A travel system for a work machine is provided that can facilitate recording of courses actually traveled by the work machine. A travel system for a motor grader includes a traveling apparatus and a controller. The traveling apparatus prompts the motor grader to travel. The controller prompts automatic recording of an actually traveled course which is a course actually traveled by the motor grader.
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