公开(公告)号：US06799424B2

公开(公告)日：2004-10-05

申请号：US10288520

申请日：2002-11-06

申请人： Kensuke Ioku ,  Hitoshi Segawa

发明人： Kensuke Ioku ,  Hitoshi Segawa

IPC分类号： E02F900

CPC分类号： E02F9/2292 ,  E02F9/2239

摘要： A hydraulic circuit comprises a first and a second merging line capable of supplying pressure oil from a third pump for a third circuit to directional control valves in a first and a second circuit, respectively, and a merging valve for selectively communicating or cutting off the first and the second merging line with or from the third pump. The merging valve has a first shift position at which the third pump is connected to the second merging line, and a second shift position at which the third pump is connected to the first and the second merging line. The merging valve is shifted continuously between the shift positions. The hydraulic circuit can efficiently distribute pressure oil supplied from the third pump to the first and/or second circuit as well, and can prevent lowering of the operability of each of actuators connected to the first or second circuit.

摘要翻译： 一个液压回路包括一个第一和第二合流管，它们能够分别从第三回路的第三泵向第一和第二回路中的方向控制阀供应压力油，以及用于选择性地连通或切断第一 和第三个泵的第二个合并线。 合流阀具有第一换档位置，第三泵连接到第二合并管线，第二换档位置，第三泵被连接到第一和第二合流管线。 合流阀在换档位置之间连续移动。 液压回路可以有效地将从第三泵供给的压力油分配到第一和/或第二回路，并且可以防止连接到第一或第二回路的每个致动器的可操作性降低。