| 摘要 |
<p>PURPOSE:To eliminate a piping between logic valves by a method wherein a pair of oil passages to be connected to both discharging ports of a discharging direction variable pump are arranged in parallel, a pair of logic valves constituting each of control valves are arranged to perpendicularly cross both direction of oil passage and the direction of arrangement of logic valves. CONSTITUTION:A pair of logic valves 40, 41 constituting one control valve 42 are arranged such that pump ports 43a and 43b are faced to each other, pilot ports 44a, 44b are faced outwardly and arranged perpendicularly to the oil passages 34a, 34b. Work ports 45a, 45b of the logic valves 40, 41 to be connected to an actuator are arranged in such a direction as perpendicularly crossing both the direction of oil passages 34a, 34b and the direction of arrangement of the logic valves 40, 41. In this way, the logic valves 40, 41 are communicated with other logic valves through the oil passages 34a, 34b, so that the piping between these component elements can be eliminated.</p> |
