发明名称 |
Travel control device for hydraulically driven vehicle and hydraulically driven vehicle |
摘要 |
The present invention includes a hydraulic pump 10 driven by a prime mover 1 , a traveling motor 12 driven with pressure oil delivered from the hydraulic pump 10 , a control valve 11 for traveling that controls a flow rate of the pressure oil delivered from the hydraulic pump 10 to the traveling motor 12 , a counterbalance valve 13 switched in response to a motor load pressure supplied via the control valve 11 , that generates a braking pressure at a conduit L 1 A or L 1 B disposed on a return side of the traveling motor 12 as the load pressure becomes lower, an overspeed detection means 42 for detecting an overspeed state in the traveling motor 12 , and a motor overspeed inhibiting means 50 for inhibiting rotation of the traveling motor 12 if the overspeed detection means 42 detects an overspeed state in the traveling motor 12 until a braking pressure is generated through a switchover at the counterbalance valve 13 and the traveling motor 12 is no longer in the overspeed state.
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申请公布号 |
US2007119163(A1) |
申请公布日期 |
2007.05.31 |
申请号 |
US20040573757 |
申请日期 |
2004.09.17 |
申请人 |
HITACHI CONSSTRUCTION MACHINERY CO., LTD. |
发明人 |
TATSUNO YUKIHIRO;ICHIMURA KAZUHIRO |
分类号 |
F02D45/00;F16D39/00;F02D29/00;F02D29/04;F02D41/12;F15B11/00;F15B11/02;F15B11/044;F16H61/40;F16H61/421;F16H61/431;F16H61/438 |
主分类号 |
F02D45/00 |
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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