发明授权
- 专利标题: Working vehicle
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申请号: US16979975申请日: 2019-09-24
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公开(公告)号: US11572674B2公开(公告)日: 2023-02-07
- 发明人: Tetsuji Tanaka , Koji Hyodo , Yasunori Miyamoto , Isamu Aoki
- 申请人: HITACHI CONSTRUCTION MACHINERY CO., LTD.
- 申请人地址: JP Tokyo
- 专利权人: HITACHI CONSTRUCTION MACHINERY CO., LTD.
- 当前专利权人: HITACHI CONSTRUCTION MACHINERY CO., LTD.
- 当前专利权人地址: JP Tokyo
- 代理机构: Mattingly & Malur, PC
- 优先权: JPJP2018-184000 20180928
- 国际申请: PCT/JP2019/037348 WO 20190924
- 国际公布: WO2020/067053 WO 20200402
- 主分类号: E02F9/22
- IPC分类号: E02F9/22 ; B62D5/07
摘要:
Provided is a working vehicle capable of increasing lifting operation speed of a working device without increasing cost, even when provided with a circuit configuration that prioritizes a steering operation over a working device operation.
A wheel loader 1 comprises a priority valve 451 configured to allow hydraulic oil discharged from a hydraulic pump 41 to flow into a steering drive circuit 43 preferentially over a working device drive circuit 44, and further comprises: an electric steering lever 30; a pair of solenoid control valves 34A, 34B configured to control a steering directional control valve 33; and a controller 5. The controller 5 is configured to control the pair of solenoid control valves 34A, 34B so as to limit operation speed of a steering 3 when determining that an engine 40 is in a low idle state and a lift arm 21 is performing a lifting operation.
A wheel loader 1 comprises a priority valve 451 configured to allow hydraulic oil discharged from a hydraulic pump 41 to flow into a steering drive circuit 43 preferentially over a working device drive circuit 44, and further comprises: an electric steering lever 30; a pair of solenoid control valves 34A, 34B configured to control a steering directional control valve 33; and a controller 5. The controller 5 is configured to control the pair of solenoid control valves 34A, 34B so as to limit operation speed of a steering 3 when determining that an engine 40 is in a low idle state and a lift arm 21 is performing a lifting operation.
公开/授权文献
- US20210047801A1 WORKING VEHICLE 公开/授权日:2021-02-18
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