- 专利标题: Circuit for controlling a double-action hydraulic drive cylinder
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申请号: US11988908申请日: 2006-01-27
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公开(公告)号: US20100083651A1公开(公告)日: 2010-04-08
- 发明人: Ivan Hristov , Josef Zürcher
- 申请人: Ivan Hristov , Josef Zürcher
- 优先权: CH1366/05 20050819
- 国际申请: PCT/CH2006/000057 WO 20060127
- 主分类号: F16D31/02
- IPC分类号: F16D31/02
摘要:
Circuit for controlling a double-action hydraulic drive cylinder includes a directional control valve having working ports A and B, a pump port P, and a tank port T, wherein the directional control valve has a neutral position in which pump port P is blocked and working ports A, B are connected to tank port T. A pressure-limiting valve and a controllable load-holding valve are connected to the piston space in parallel, and a regeneration check valve is connected in series between a connection point for the parallel components and the rod space. A first precharge valve is connected between the working port A and the connection point, and a first bypass check valve is connected anti-parallel parallel with the first precharge valve and the load-holding valve. A second precharge valve is connected in series with the directional control valve between the tank port P and the rod space.
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