| 摘要 |
<p>PURPOSE:To downsize and reduce cost of a confluence controller for having operation oil of the first oil pressure circuit merge with an oil pressure provision side of the second oil pressure circuit. CONSTITUTION:Pilot switch valves 26 for confluence control are arranged in series between the first oil pressure circuit C1 and the second oil pressure circuit C2 and a pilot pressure guiding circuit C3 is added. Under a condition of without provided any pilot pressure, the confluence control pilot switch valves 26 keep a position of operation oil flowing in the first oil circuit C1 to relieve to a return oil path 14 as it is and under a condition of provided with pilot pressure, operation oil is guided to the oil pressure provision side of the second oil pressure circuit C2 so as to be switched to a position for being merged with pressed oil from the second oil pressure source C2. When pilot pressure is provided to either one of a main winding drive pilot switch valve 30 or an auxiliary winding drive pilot switch valve 34 in the second oil pressure circuit C2, the pilot pressure guiding circuit C3 guides this pilot pressure to the above confluence control pilot switch valves 26.</p> |
