| 摘要 |
An eccentric radial piston pump and an eccentric radial piston motor. In the eccentric radial piston pump, a rib (12) projected in the radial direction is formed on the delivery side end part inner peripheral surface of an eccentric cam ring (3) over a prescribed range. In the eccentric radial piston motor, a rib (12) projected in the radial direction is formed on the high-pressure side end part inner peripheral surface of the eccentric cam ring (3) over a prescribed range. The rigidity of the eccentric cam ring (3) is increased by the rib (12) formed in the radial direction to prevent the eccentric cam ring from being deformed by a thrust from a piston. Thus, the rigidity of the eccentric cam ring can be increased without increasing the wall thickness of the eccentric cam ring and the outside dimensions of the eccentric cam ring in the radial direction can be reduced in the eccentric radial piston pump and the eccentric radial piston motor.
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