| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hydraulic controller capable of miniaturizing a valve block. SOLUTION: In this hydraulic controller assembling a first circuit system 19 consisting of a plurality of spool valves and connected with a first pump P1 and a second circuit system 20 consisting of a plurality of spool valves and connected with a second pump P2 into one valve block 36 and provided with a confluent passage 35 for making pressure oil in the circuit system on one side confluent with pressure oil in the circuit system on the other side, a confluent selector valve 25 of two port two position type is provided in both or either of the first circuit system 19 and the second circuit system 20. The confluent selector valve 25 communicates the downstream side of the circuit system with a tank T in accordance with its change-over position or shuts off the communication, while one end of the confluent passage 35 is connected with the upstream side of the confluent selector valve 25, and the other end of the confluent passage 35 is connected with the circuit system on the other side.</p> |
