| 摘要 |
PROBLEM TO BE SOLVED: To prevent air from infiltrating into a spring storage chamber of a linear solenoid valve, with a small, simple structure.SOLUTION: A solenoid 14 and a spring 16 are respectively connected to both ends of a spool 13 fitted to a sleeve 12, and an oil reservoir 17 partitioned between the outer peripheral surface of the sleeve 12 and the inner peripheral surface of a sleeve support hole 11a of a valve body 11 communicates with a spring storage chamber 15 through an orifice 12f and also communicates with an atmosphere open port P1 at the upper part of the sleeve 12. The spring storage chamber 15 can thereby be filled with oil leaking from a pressure port P5, and oil in the oil reservoir 17 can be prevented from falling out of the atmosphere open port P1 under gravity. Air is thereby prevented from infiltrating into the spring storage chamber 15 from the oil reservoir 17. Moreover, since there is no need to separately constitute a large-sized oil reservoir with a high oil level, the valve body 11 can be miniaturized. |
