| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the flow resistance of hydraulic fluid by mounting a hydraulic control valve means on the top of a pump housing and an oil cleaner on the bottom thereof. SOLUTION: Low pressure positive/negative logic solenoid control valves 87, 88 constituting a hydraulic control valve means V are mounted on a mounting part 78 on the top of a main housing 301 constituting the pump housing 22, of a pump P. The valve elements of the other high constant pressure/middle pressure negative logic/low pressure control valves 84, 85, 86 are fitted directly in a valve body 81 arranged on the top surface of the mounting part 78. An oil cleaner C1 is mounted on the bottom of the end wall of the main housing 301 . As described above, the close arrangement of the pump P, control valves 84 to 88, and the oil cleaner C1 can shorten the oil passage connecting the pump P, control valves 84 to 88, and the oil cleaner C1 to reduce the flow resistance of hydraulic fluid and the size of the device.</p> |
