| 摘要 |
PROBLEM TO BE SOLVED: To improve the volumetric efficiency of an HST by preventing leakage from a high-pressure side to a cooler circuit in a shuttle valve. SOLUTION: The shuttle valve 10 has a stepped hole 12 drilled on a main body 11, and a spool 13 slidably fitted into the stepped hole 12. Two inlets 26, 27, and one outlet 28 are arranged on the main body 11. Stepped spools 13a, 13b are slidably fitted into the stepped hole 12. Spring members 18a, 18b are loosely inserted into projection sections 19a, 19b arranged on a large-diameter sections 20a, 20b of the stepped spools 13a, 13b. Shaft sections 23, 24 are formed on a middle-diameter sections 21a, 21b, the shaft sections 23, 24 are slidably inserted each other, and the stepped spools 13a, 13b are connected with resilient force of the spring members 18a, 18b at a pushed state. COPYRIGHT: (C)2009,JPO&INPIT
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