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公开(公告)号：US20240133157A1
公开(公告)日：2024-04-25
申请号：US18279442
申请日：2022-03-14
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Shinjiro YAMAMOTO , Shinya IMURA , Koji SHIWAKU , Hiroki ISHII
CPC classification number: E02F9/205 , E02F9/2004 , E02F9/2203 , E02F9/24
Abstract: Provided is a work machine control system which enables a worker to perform a work more easily in the vicinity of a work machine executing a task automatically. A work machine control system comprises: a work machine that executes a task automatically as a work to be executed; and a task control device for controlling execution of the task. The work machine comprises a vehicle body control device and a hydraulic actuator used for executing the task, wherein the vehicle body control device comprises: a task content input section for receiving input of task content information; a movement control section for calculating a speed instruction of the hydraulic actuator based on the task content information; a receiving section for receiving task control information outputted from the task control device having a task control input section for receiving input of the task control information; and a task control section for controlling execution of the task based on the task control information.
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公开(公告)号：US20220333348A1
公开(公告)日：2022-10-20
申请号：US17641038
申请日：2021-03-18
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： Kento KUMAGAI , Shinya IMURA , Yasutaka TSURUGA , Takaaki CHIBA , Hiroaki AMANO , Shinji NISHIKAWA , Akihiro NARAZAKI , Genroku SUGIYAMA , Shinjiro YAMAMOTO
Abstract: Provided is a work machine which can increase the operation speed of an actuator by a regeneration function while securing the position control accuracy of the actuator. A controller is configured to calculate a regeneration flow rate on the basis of an input amount of an operation lever and a target actuator flow rate, subtract the regeneration flow rate from the target actuator flow rate to calculate a target actuator supply flow rate, calculate a target flow rate control valve opening amount on the basis of the target actuator supply flow rate, calculate a target pump flow rate that is equal to or higher than a total target actuator supply flow rate, control a selector valve on the basis of the input amount of the operation lever, control a flow rate control valve according to the target flow rate control valve opening amount, and control a hydraulic pump according to the target pump flow rate.
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公开(公告)号：US20230304261A1
公开(公告)日：2023-09-28
申请号：US18024119
申请日：2022-02-28
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Hiroki ISHII , Shinya IMURA , Shinjiro YAMAMOTO , Koji SHIWAKU
CPC classification number: E02F9/205 , E02F9/265 , G07C5/02 , E02F9/2285
Abstract: A work machine includes: a work device; a posture sensor that senses posture information of the work device; a hydraulic actuator that drives the work device; and a controller configured to generate operation plan information on the basis of task information necessary for automatic control, the task information being obtained from an external system, and perform automatic control of the hydraulic actuator on the basis of the operation plan information and a sensing result of the posture sensor. The controller outputs the operation plan information to the external system. The controller does not perform the automatic control when an approval signal indicating that the operation plan information is approved is not input from the external system. The controller performs the automatic control when the approval signal is input from the external system.
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公开(公告)号：US20220282459A1
公开(公告)日：2022-09-08
申请号：US17632362
申请日：2020-03-25
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： Takaaki CHIBA , Shinya IMURA , Shinjiro YAMAMOTO , Masamichi ITO , Koji SHIWAKU
Abstract: Provided is an operation assistance system for a work machine having both operation assistance and work assistance functions, capable of reducing the inconvenience to an operator or the like of setting an area of the operation assistance function and an area of the work assistance function, and preventing a collision of the work machine with an object in a work area. The operation assistance system for a work machine has the operation assistance function of stopping a hydraulic excavator (work machine) 1 when an object is detected in a stop area 40 set in advance and the work assistance function of preventing the hydraulic excavator (work machine) 1 from going out of a work area 51 set in advance. When both of the work assistance function and the operation assistance function can be switched between enabled and disabled states, and when the work assistance function is in an enabled state and the work area 51 is set, the operation assistance system enables the operation assistance function and sets the work area 51 as the stop area 40.
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公开(公告)号：US20240287765A1
公开(公告)日：2024-08-29
申请号：US18572600
申请日：2022-03-22
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Hiroki ISHII , Shinjiro YAMAMOTO , Koji SHIWAKU
CPC classification number: E02F9/2267 , E02F3/43 , E02F9/2029
Abstract: A work machine is capable of appropriately setting a target locus and target postures for a work implement depending on an excavation environment and an excavation object under automatic excavation control. To accomplish this, a controller calculates a target locus passing through an excavation starting position where a control point is positioned when an excavation is started, an excavation-in-progress position where the control point is positioned when the excavation is in progress, and an excavation finishing position where the control point is positioned when the excavation is finished, and a target posture for the work implement at the time the control point moves on the target locus. The controller controls a control valve such that the control point moves on the target locus and such that a posture of the work implement at the time where the control point moves on the target locus matches the target posture.
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Patent Agency Ranking
公开(公告)号：US20240229418A9
公开(公告)日：2024-07-11
申请号：US18279442
申请日：2022-03-15
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Shinjiro YAMAMOTO , Shinya IMURA , Koji SHIWAKU , Hiroki ISHII
CPC classification number: E02F9/205 , E02F9/2004 , E02F9/2203 , E02F9/24
Abstract: Provided is a work machine control system which enables a worker to perform a work more easily in the vicinity of a work machine executing a task automatically. A work machine control system comprises: a work machine that executes a task automatically as a work to be executed; and a task control device for controlling execution of the task. The work machine comprises a vehicle body control device and a hydraulic actuator used for executing the task, wherein the vehicle body control device comprises: a task content input section for receiving input of task content information; a movement control section for calculating a speed instruction of the hydraulic actuator based on the task content information; a receiving section for receiving task control information outputted from the task control device having a task control input section for receiving input of the task control information; and a task control section for controlling execution of the task based on the task control information.
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公开(公告)号：US20230358022A1
公开(公告)日：2023-11-09
申请号：US18025707
申请日：2021-12-08
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： Kento KUMAGAI , Shinya IMURA , Yasutaka TSURUGA , Takaaki CHIBA , Hiroaki AMANO , Shinji NISHIKAWA , Akihiro NARAZAKI , Genroku SUGIYAMA , Shinjiro YAMAMOTO
IPC: E02F9/22
CPC classification number: E02F9/2228
Abstract: The invention of the present application intends to provide a work machine that can ensure high operability by preventing abrupt actuation of an actuator and a shock to a machine body by use of a bleed-off function at the time of starting of the actuator and that can improve the energy-saving performance by reducing a bleed-off flow rate after the starting of the actuator. For this purpose, a controller opens a bleed-off valve at a timing at which an operation device is being operated and before a flow rate of a hydraulic pump starts increasing, and closes the bleed-off valve at a timing at which the operation device is being operated and after the flow rate of the hydraulic pump has started increasing.
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公开(公告)号：US20230332379A1
公开(公告)日：2023-10-19
申请号：US18026621
申请日：2022-02-04
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Hiroki ISHII , Shinjiro YAMAMOTO
IPC: E02F9/22
CPC classification number: E02F9/2278 , E02F9/2203
Abstract: A work machine includes hydraulic actuators that drive a work implement, and a controller configured to output a control signal for controlling each hydraulic actuator on the basis of a velocity command to each actuator computed at each computation cycle. When controlling an action of a first hydraulic actuator under a predetermined condition according to an action of a second hydraulic actuator, the controller computes a velocity command to the first hydraulic actuator at a current computation cycle, with use of an actual velocity of each hydraulic actuator at the current computation cycle computed on the basis of a sensing signal of a posture sensor and a history of past velocity commands to each hydraulic actuator computed at previous computation cycles before the current computation cycle, and outputs a control signal according to the velocity command to the first hydraulic actuator at the current computation cycle.
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公开(公告)号：US20220154741A1
公开(公告)日：2022-05-19
申请号：US17435602
申请日：2020-05-20
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： Hiroki ISHII , Shinjiro YAMAMOTO , Masamichi ITOU , Yasutaka TSURUGA , Shinya IMURA
IPC: F15B15/20
Abstract: There is provided a work machine that can limit operation of a work device by MC, and improves the responsiveness of a hydraulic actuator to operation of an operation device by an operator, and ensures operability equivalent to that of a work machine that does not have MC functions, and allows the hydraulic actuator for which the operation device is not being operated to automatically operate in either direction of the operation directions thereof. For this purpose, a drive system includes a selector valve 203a disposed between a secondary port 134a of an operation device 45a and a flow control valve 15a and between a proportional solenoid valve 54a and the flow control valve 15a and a selector valve 203b disposed between a secondary port 134b of the operation device 45a and the flow control valve 15a and between a proportional solenoid valve 54b and the flow control valve 15a. A controller 40 switches the selector valves 203a and 203b to either one of a first position and a second position on the basis of signals from pressure sensors 70a and 70b and pressure sensors 200a and 200b and target operation set in advance regarding the selector valves 203a and 203b.
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公开(公告)号：US20230323630A1
公开(公告)日：2023-10-12
申请号：US18023513
申请日：2022-02-18
Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Inventor： Shinya KASAI , Masamichi ITO , Shinjiro YAMAMOTO
CPC classification number: E02F9/205 , G05D2201/0202 , G05D1/0038
Abstract: Provided is a remote operation device capable of remotely operating efficiently and safely a work machine that is operated from a remote location, even when a communication delay occurs. The remote operation device includes a communication control section 222 that receives a camera video image of a work site captured by a vehicle-mounted camera 91 and vehicle body information of the work machine (hydraulic shovel) 1, a predicted trajectory computing section 220 that computes a predicted trajectory of the work machine (hydraulic shovel) 1 from the vehicle body information and outputs predicted trajectory data to be displayed as a video image on a display device 202, and a display control section 221 that causes the display device 202 to display the camera video image and the video image of the predicted trajectory on the same screen (simultaneously).
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