发明名称 |
Safety device for hydraulic working machine |
摘要 |
There are provided: control valves 22-24 that control flow of pressure oil from the hydraulic source 21 to the hydraulic actuators 15-17; electric lever devices 51-53 that output electrical operation signals, which are drive instructions for the hydraulic actuators 15-17, in correspondence to lever operation; and a control unit 25-30 and 50 that controls the control valves 22-24 in correspondence to the operation signals. When the determination unit determines that an operation signal is not within the normal range, the hydraulic actuators 15-17 are allowed to be driven with flow of pressure oil to the hydraulic actuators 15-17 limited more significantly than in a case where it is decided that an operation signal is within the normal range.
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申请公布号 |
US8443597(B2) |
申请公布日期 |
2013.05.21 |
申请号 |
US20080528946 |
申请日期 |
2008.02.28 |
申请人 |
SATAKE HIDETOSHI;KODAKA KATSUAKI;GOTOU YUUKI;NAGASHIMA YUUJI;ICHIMURA KAZUHIRO;HITACHI CONSTRUCTION MACHINERY CO., LTD. |
发明人 |
SATAKE HIDETOSHI;KODAKA KATSUAKI;GOTOU YUUKI;NAGASHIMA YUUJI;ICHIMURA KAZUHIRO |
分类号 |
E02F9/22 |
主分类号 |
E02F9/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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