| 摘要 |
<p>PURPOSE: To reduce the energy of a jet of pressure oil flowing out from a conduit to a drain. CONSTITUTION: A cylinder block 11 having a cylinder 12 and a cylinder port 13, a piston 14 reciprocated in the cylinder 12, and a valve plate 5 having a low pressure port 9 and a high pressure port 10 to switch a feed and discharge in the cylinder 12 and a conduit through which a remaining pressure in the cylinder 12 is escaped are arranged in a casing 1a of which a main body consists. Further, a knock pin 6 by which the valve plate 5 is fixed to the casing 1a and a drain 22 communicated with the escape passage of the conduit are provided. Further, a mounting hole 21 for a knock pin 6 is arranged in the vicinity of the conduit and intercommunicates the mounting hole 21 and the escape passage of the conduit. A gap 30 communicated with the drain 22 is formed in a knock pin 6 part inserted in the mounting hole 21.</p> |
