| 摘要 |
<p>PROBLEM TO BE SOLVED: To overcome the problem of being unable to sufficiently obtain a noise reducing effect due to being difficult to be formed in a slender shape since a tip shape of a notch part becomes a roundish shape in a conventional valve plate formed by press molding. SOLUTION: In this valve plate 41 used for a plunger pump motor for constituting a plunger pump, a plunger motor, and a hydraulic continuously variable transmission, and arranged on a sliding end surface of a plunger block 21b, a kidney port 51 of the valve plate 41 is composed of a hole part 41a formed in the valve plate 41, and a plate member 50 fitted into the hole part 41a.</p> |
