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1. 发明申请

US20220064904A1 Work Machine 有权
公开(公告)号：US20220064904A1
公开(公告)日：2022-03-03
申请号：US17418412
申请日：2019-11-12
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Yoshiyuki TSUCHIE , Kouichi SHIBATA
IPC分类号： E02F9/22 , E02F9/24 , F15B13/044
摘要： In a work machine including a solenoid valve that generates a pilot pressure to drive a directional control valve with use of the delivery pressure of a pilot pump as a source pressure, a shut-off valve that shuts off a hydraulic operating fluid from the pilot pump to the solenoid valve, a first sensor that senses the amount of operation of an operation lever, and a second sensor that senses a state amount relating to operation of the solenoid valve, whether or not an abnormality of the second sensor exists is determined on the basis of a sensing signal of the second sensor. When it is determined that the second sensor is abnormal, on the basis of a sensing signal of the first sensor, an opening command is made to the shut-off valve if operation of the operation lever is sensed, and a closing command is made to the shut-off valve if the neutral state of the operation lever is sensed.

2. 发明申请

US20210207345A1 Work Machine 有权
公开(公告)号：US20210207345A1
公开(公告)日：2021-07-08
申请号：US17057414
申请日：2019-06-11
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Hiroyuki KOBAYASHI , Yoshiyuki TSUCHIE , Hidekazu MORIKI , Hiroshi SAKAMOTO
IPC分类号： E02F9/22 , F15B11/028 , F15B11/08 , F15B21/045
摘要： Provided is a work machine with which responsiveness of a hydraulic actuator can be improved when driving the hydraulic actuator through an electric lever-type operation device. A controller 100 further includes: an operation direction determining section 116 configured to determine operation directions of operation devices 2a and 2b; and a standby pressure switching command section 117 configured to output a standby pressure switching command to a first target pilot pressure correction section 112 or a second target pilot pressure correction section 113 which corresponds to a solenoid proportional valve that does not correspond to the operation direction from among first solenoid proportional valves 41a, 42a, 42b, 43a, 43b, and 44a and second solenoid proportional valves 41b, 42c, 42d, 43c, 43d, and 44b. The first target pilot pressure correction section and the second target pilot pressure correction section are configured to switch a first standby pressure α to a second standby pressure β set lower than the first standby pressure in a case in which the standby pressure switching command has been inputted.

3. 发明申请

US20230114481A1 Work Machine 有权
公开(公告)号：US20230114481A1
公开(公告)日：2023-04-13
申请号：US17909506
申请日：2021-05-26
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Kazushige KUROKAMI , Takaaki ISHII , Shigeki TOKITA , Hiroshi SAKAMOTO , Yoshiyuki TSUCHIE
IPC分类号： E02F9/24 , E02F9/26 , E02F9/20
摘要： A work machine includes: an informing device that informs an operator; an input device for inputting predetermined information; a notification device that gives a notification to a worker around the work machine; a controller; and a communication device that communicates with a mobile terminal carried by the worker. The controller determines whether or not an approval request for requesting approval of entry into a movable range of the work machine transmitted from the mobile terminal when the worker around the work machine operates the mobile terminal has been received; inform, by using the informing device, that the approval request has been received when it is determined that the approval request has been received; determine whether or not approval operation of approving entry into the movable range has been performed on the input device; set an interpersonal communication level representing a degree of interpersonal communication between the operator and the worker depending on whether or not the approval request has been received and whether or not the approval operation has been performed; decide a mode of notification in accordance with the interpersonal communication level; and give a notification in the mode of notification by using the notification device.

4. 发明申请

US20180223500A1 CONSTRUCTION MACHINE 审中-公开
公开(公告)号：US20180223500A1
公开(公告)日：2018-08-09
申请号：US15749828
申请日：2016-03-15
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Yoshiyuki TSUCHIE , Hiroshi SAKAMOTO , Hidekazu MORIKI , Yasutaka TSURUGA
IPC分类号： E02F3/43 , E02F9/22 , E02F9/20 , E02F3/32
摘要： A construction machine includes a control device having a reaction-force correction control section. When a difference between a target operator input and an actual operator input for a front member exceeds a preset range, the reaction-force correction control section executes correction to increase an operation reaction force to be applied by a reaction-force applying device to an operating unit operating an actuator driving the front member. When the difference falls within the range, the reaction-force correction control section executes correction to decrease the operation reaction force to be applied by the reaction-force applying device to the operating unit operating the actuator driving the front member.

5. 发明申请

US20220349151A1 Work Machine 有权
公开(公告)号：US20220349151A1
公开(公告)日：2022-11-03
申请号：US17638303
申请日：2020-09-14
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Shinya IMURA , Yoshiyuki TSUCHIE
IPC分类号： E02F9/20 , E02F9/26 , E02F9/24
摘要： Provided is a work machine capable of eliminating the inconvenience from the operator of the work machine as much as possible while deterring a contact between the work machine and workers, and suppressing a decrease in productivity of the work machine. A work machine 5 includes: an identification information recognition device 41 configured to recognize identification information on a person who enters a predetermined region R around the work machine 5; and a controller 7 configured to control the work machine in accordance with the identification information. When a person enters the predetermined region R under the condition that the work machine 5 is ready for operation, the controller 7 counts the number of times the person enters the predetermined region R as the number of approaches for each person distinguished with the identification information, and controls the work machine 5 based on the counted number of approaches in accordance with the identification information of the person who is in the predetermined region R.

6. 发明申请

US20220074168A1 Automatic Operation Work Machine 有权
公开(公告)号：US20220074168A1
公开(公告)日：2022-03-10
申请号：US17419366
申请日：2020-02-14
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Hiroyuki YAMADA , Yoshiyuki TSUCHIE , Shiho IZUMI
IPC分类号： E02F9/20 , E02F9/26 , E02F9/12
摘要： When an automatic operation is finished, a detection process for detecting a ground contactable range where a work implement can be set is carried out on a basis of terrain profile information acquired by laser scanners, and, when the ground contactable range is detected, an automatic operation command signal for placing the work implement in contact with the ground contactable range is generated, whereas when the ground contactable range is not detected, an automatic operation command signal for placing the work implement in a predetermined standby posture is generated. As a result, a suitable standby posture can be taken according to the surrounding conditions when the automatic operation is finished.

7. 发明申请

US20180119386A1 Control System for Construction Machine 审中-公开
公开(公告)号：US20180119386A1
公开(公告)日：2018-05-03
申请号：US15567723
申请日：2016-02-23
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Hiroyuki KOBAYASHI , Hiroshi SAKAMOTO , Yoshiyuki TSUCHIE , Hidekazu MORIKI , Yasutaka TSURUGA
IPC分类号： E02F9/20 , E02F3/32 , E02F9/22
CPC分类号： E02F9/2025 , E02F3/32 , E02F9/2004 , E02F9/2037 , E02F9/22 , E02F9/2285 , F15B11/08
摘要： At times of a travel-solo state of the machine body, the outputting of unnecessary electric lever operating device signals caused by machine body oscillation due to the traveling is inhibited. At times of traveling work, the output limitation of electric lever operating device signals necessary for work is inhibited. A control system for a construction machine includes an electric lever operating device that outputs a command to a hydraulic actuator, a travel control lever device that outputs a command to a travel device, and a controller that outputs a drive command to a solenoid proportional valve that decompresses hydraulic fluid supplied from a pilot hydraulic source. The control system includes a machine body state judgment part that judges the state of the machine body based on an electric signal from the electric lever operating device and an operation amount of the travel control lever device and a dead zone calculation part that calculates a dead zone for the electric signal from the electric lever operating device based on the state of the machine body. The dead zone calculation part sets the dead zone for the electric signal at a first predetermined value when the machine body is in the travel-solo state and sets the dead zone for the electric signal at a second predetermined value smaller than the first predetermined value when the machine body is in the traveling work state.

8. 发明公开

US20240191472A1 WORK MACHINE AND WORK MACHINE SYSTEM 审中-公开
公开(公告)号：US20240191472A1
公开(公告)日：2024-06-13
申请号：US18279413
申请日：2022-03-16
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Yoshiyuki TSUCHIE
IPC分类号： E02F9/20 , E02F9/24 , E02F9/26
CPC分类号： E02F9/2033 , E02F9/205 , E02F9/24 , E02F9/26 , E02F9/268
摘要： Provided are a work machine and a work machine system that reduce risk that a vehicle body comes into contact with an obstacle nearby in a case wherein abnormality arises in the work machine. The work machine comprises: a traveling body; a rotary body rotatably mounted onto the traveling body; a work machinery of an articulated type mounted to the rotary body and including a boom, an arm and a work tool; and a control device. The control device comprises a control instruction calculation section, a machine control section, an abnormality detection section, an avoiding movement necessity determination section and an avoidance control instruction section. The machine control section controls the traveling body, the rotary body and the work machinery putting priority on the avoidance control instruction over the operation control instruction.

9. 发明申请

US20220259832A1 On-Site Monitoring Apparatus and On-Site Monitoring System 有权
公开(公告)号：US20220259832A1
公开(公告)日：2022-08-18
申请号：US17627437
申请日：2020-05-26
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Yoshiyuki TSUCHIE , Shinya IMURA , Hidekazu MORIKI
IPC分类号： E02F9/26 , E02F9/24
摘要： Provided is an on-site monitoring apparatus and an on-site monitoring system that can appropriately set an area to be subjected to on-site monitoring. The on-site monitoring apparatus includes warning devices 104 and 309 that output a warning, peripheral object detection devices 102 and 307 that detect a position of a partition object 512, work area input devices 101 and 305 that receive an input of information indicating boundaries AB and BC to be arranged with a partition object, and control devices 103 and 308. The control devices 103 and 308 includes operation environment determination sections 107 and 312 that determine, for each boundary, whether the boundary is an arranged boundary where the partition object 512 is arranged at a position corresponding to the boundary or an unarranged boundary where the partition object 512 is not arranged at a position corresponding to the boundary, and warning content determination sections 108 and 313 that output a warning by the warning devices 104 and 309 when at least one unarranged boundary is present.

10. 发明申请

US20210018942A1 WORK MACHINE 有权
公开(公告)号：US20210018942A1
公开(公告)日：2021-01-21
申请号：US16306908
申请日：2017-06-01
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Yoshiyuki TSUCHIE , Hiroshi SAKAMOTO
IPC分类号： G05D16/08 , F16K13/10
摘要： A work machine includes an operation intention determining section that determines whether or not an operator has an intention of operating an operation member based on a state change of the operation member, a current supply section that supplies a current to a solenoid valve device based on an operation of the operation member, and a current control section that permits supply of a standby current from the current supply section to the solenoid valve device when it has been determined by an operation position determining section that the operation member is disposed within a preset neutral range and it has been determined by the operation intention determining section that there is an intention of operating the operation member, the standby current being lower than a current of the time when a hydraulic actuator starts driving.

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