| 摘要 |
PURPOSE:To increase a cooling effect of a motor, by using a full amount of circulating oil for cooling of the motor. CONSTITUTION:High pressure oil, if fed from a port 21, goes into a pressure oil chamber 26 through an oil conduction hole 32 to move a plunger 16 rightward, in this way, the high pressure oil, fed to a cylinder 9 through a pressure oil chamber 29, oil paths 18, 14 and pressure oil chamber 12, presses the internal peripheral surface of a cam ring 4 to rotate a rotor 7. Subsequently, the cylinder 9 is communicated to a pressure oil chamber 13, and low pressure oil in the cylinder 9 goes into a pressure oil chamber 31 through oil paths 15, 19. The low pressure oil, flowing into the pressure oil chamber 31, flows into a casing inside 22 through an oil path 24, to cool an oil hydraulic motor, and then is discharged. Accordingly, a remarkably large cooling effect can be obtained. |
