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公开(公告)号：EP4311228A1
公开(公告)日：2024-01-24
申请号：EP22771001.9
申请日：2022-02-18
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： KASAI, Shinya , ITO, Masamichi , YAMAMOTO, Shinjiro
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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公开(公告)号：EP3301229A1
公开(公告)日：2018-04-04
申请号：EP17159127.4
申请日：2017-03-03
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： ITO, Masamichi , OOKI, Takatoshi , TAKAHASHI, Kiwamu
IPC: E02F9/22 , F15B11/024 , F15B21/14
Abstract: To keep operability of a hydraulic actuator 3 excellent even in a state pressure has been sufficiently accumulated in a pressure accumulator 300. In a hydraulic driving device of a work machine including a hydraulic actuator 3, a tank 20, a flow control valve 6, and a pressure accumulator 300, there are further provided with a first pressure compensation valve 201 that is for controlling difference between front and back pressures of the flow control valve 6 constant and a second pressure compensation valve 202 that is arranged between the pressure accumulator 300 and the tank 20 and is for controlling difference between front and back pressures of the flow control valve 6 and the first pressure compensation valve 201 constant.
Abstract translation: 为了保持即使在状态压力下也良好的液压致动器3的可操作性已经充分累积在蓄压器300中。在包括液压致动器3，储箱20，流量控制阀6和工作机械的工作机械的液压驱动装置中， 蓄压器300还设置有第一压力补偿阀201和第二压力补偿阀202，该第一压力补偿阀201用于控制流量控制阀6的前后压差，该第二压力补偿阀202布置在蓄压器300和 并且用于控制流量控制阀6和第一压力补偿阀201的前后压力之差恒定。
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公开(公告)号：EP3301229B1
公开(公告)日：2019-12-18
申请号：EP17159127.4
申请日：2017-03-03
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： ITO, Masamichi , OOKI, Takatoshi , TAKAHASHI, Kiwamu
IPC: E02F9/22 , F15B11/024 , F15B21/14
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公开(公告)号：EP4502292A1
公开(公告)日：2025-02-05
申请号：EP22935277.8
申请日：2022-03-30
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： ITO, Masamichi , YAMAMOTO, Shinjiro , OGAWA, Yuichi
Abstract: Provided is an automated control system for a work machine capable of suppressing deterioration of the workability in automated work caused by instability of the ground for the work machine. An automated traveling control section 703 performs automated traveling of the work machine; an automated work control section (automated excavation control section 704) performs automated work of the work machine; and a stability determination section 702 determines stability of ground for the work machine. When execution of automated traveling control by the automated traveling control section 703 is to be followed by execution of automated work control by the automated work control section (automated excavation control section 704), stability determination by the stability determination section 702 is executed before executing the automated work control, and automated control of the work machine is executed on the basis of a determination result obtained by the stability determination section 702.
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Patent Agency Ranking
公开(公告)号：EP3916161A1
公开(公告)日：2021-12-01
申请号：EP19948149.0
申请日：2019-09-30
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： IMURA, Shinya , ITO, Masamichi , MORIKI, Hidekazu , SAITO, Yuho
IPC: E02F9/20
Abstract: Provided is a work machine that can suppress decrease in work efficiency while reducing the possibility of contacting a worker or a dump truck, etc. A movement range is set in advance so as to avoid entry of a worker or a dump truck, etc. into the set movement range. The work machine performs stop control with clearance for an obstacle having entered the movement range, but performs stop control with relatively small clearance (minimum clearance) for a movement range. Thus, the work machine can reduce the frequency of stopping a body or a work implement and suppress decrease in work efficiency. Since the work machine controls the body or the work implement to stop with clearance when the worker or the dump truck, etc. enters the movement range of the work machine, the work machine can reduce the possibility of contacting the worker or the dump truck, etc.
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公开(公告)号：EP3683364A1
公开(公告)日：2020-07-22
申请号：EP17922064.5
申请日：2017-09-13
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： ITO, Masamichi , NAKANO, Hisami , SUZUKI, Yusuke , NARAZAKI, Akihiro , IGARASHI, Teruki
Abstract: A controller (40) for a hydraulic excavator includes a first speed computation section (43f), a second speed computation section (43d), and a third speed computation section (43e). The first speed computation section (43f) calculates a first speed of an arm cylinder (6) from a value detected by an operation amount sensor (52a). The second speed computation section (43d) calculates a second speed of the arm cylinder (6) from a value detected by a posture sensor (50). The third speed computation section (43e) calculates a third speed that is used as the speed of the arm cylinder (6) in an actuator control section (81) adapted to execute MC. The third speed computation section calculates the first speed as the third speed during the period between the detection of an input of operation for an arm (9) by the operation amount sensor and predetermined time t0, calculates as the third speed a speed calculated from the first speed and the second speed during the period between predetermined time t0 and predetermined time t1, and calculates the second speed as the third speed at and after predetermined time t1.
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公开(公告)号：EP3597942A1
公开(公告)日：2020-01-22
申请号：EP18766949.4
申请日：2018-01-31
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： ITO, Masamichi , OOKI, Takatoshi
Abstract: There is provided a hydraulic driving device for working machine having operability handling a change in burden weight in a front working device due to a loaded burden and the like when the working machine that accumulates energy in an accumulator and recovers and regenerates the energy performs an operation of lowering the front working device. A hydraulic driving device 5 includes a main pump 101, a boom cylinder 3, a tank 20, a flow rate control valve 6, an accumulator 300, a first differential pressure control valve 201, and a second differential pressure control valve 202. The first differential pressure control valve 201 is located between the boom cylinder 3 and the accumulator 300. The first differential pressure control valve 201 performs control on discharge oil from the boom cylinder 3 such that a differential pressure between before and after the flow rate control valve 6 becomes a target differential pressure. The second differential pressure control valve 202 is located between the accumulator 300 and the tank 20. The second differential pressure control valve 202 performs control on the discharge oil such that a differential pressure between an upstream pressure and a downstream pressure of the flow rate control valve 6 and the first differential pressure control valve 201 becomes the target differential pressure. The first and the second differential pressure control valves 201 and 202 are configured such that the target differential pressure increases according to an increase in pressure of the discharge oil.
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公开(公告)号：EP4039892A1
公开(公告)日：2022-08-10
申请号：EP20871610.0
申请日：2020-09-29
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： AKITA, Tarou , KOBAYASHI, Takahiro , NARAZAKI, Akihiro , ITO, Masamichi
IPC: E02F9/22
Abstract: When an operation amount of an operation lever 1a or 1b corresponding to a boom cylinder 5 is equal to or smaller than an operation amount of an operation lever 1a or 1b corresponding to an arm cylinder 6, an estimated velocity of the arm cylinder used for region limiting control is computed on the basis of a first condition defining, in advance, a relation between the operation amount of the operation lever 1a or 1b and the estimated velocity of the arm cylinder 6. When the operation amount of the operation lever 1a or 1b corresponding to the boom cylinder 5 is larger than the operation amount of the operation lever 1a or 1b corresponding to the arm cylinder 6, the estimated velocity of the arm cylinder 6 used for the region limiting control is computed as a velocity higher than the estimated velocity of the arm cylinder 6 computed on the basis of the first condition. The behavior of a work device can thereby be stabilized.
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公开(公告)号：EP3783155A1
公开(公告)日：2021-02-24
申请号：EP18915478.4
申请日：2018-04-17
Applicant: Hitachi Construction Machinery Co., Ltd.
Inventor： ITO, Masamichi , NARIKAWA, Ryuu , IMURA, Shinya
IPC: E02F9/22
Abstract: A hydraulic excavator 1 is provided with a controller 40 including an actuator control section 81 which, when an operation device 45, 46 is operated, controls at least one of a plurality of hydraulic actuators 5, 6, 7 in accordance with the velocities of the plurality of hydraulic actuators 5, 6, 7 and a predetermined condition. The controller 40 determines, based on a sensed value from a posture sensor 50, the direction of a load exerted on an arm cylinder 6 due to the weight of an arm 9, outputs, upon determining that the direction of the load is opposite to a driving direction of the arm cylinder 6, a second velocity Vamt2 to the actuator control section 81, and outputs, upon determining that the direction of the load is the same as the driving direction of the arm cylinder 6, a third velocity Vamt3 to the actuator control section 81.
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