| 摘要 |
<p>PURPOSE:To simplify structure while increasing volumetric efficiency by a mechanism wherein bearings regulating the quantity of a clearance are provided between a rotor and a controlling pin, while a staged section is formed on a cylinder and force pushing the rotor to the controlling pin is generated. CONSTITUTION:As regard to an area of a stage section 58b formed by a cylinder 58 and a cylinder small diameter section 58a, pushing force F1 pushing a rotor 53 by a pressure fluid applied to the stage section 58b to the controlling pin 52 side and separating force F4 of which the pressure of a fluid flowing into a change-over surface 62 section is applied to a pressure receiving surface 58c and the rotor 53 is separated from the controlling pin 52 balance on the change-over surface 62 or the pushing force F1 is slightly greater than the separating force F4. When the rotor 53 is turned through bearings 67 against the pin 52, a shoe 60 is slid along a cam ring 61, fluid pressure in the cylinder 58 is applied to a piston 59, the reaction force is applied to the stage section 58b and a casing 51, and a clearance at the high pressure side of the change-over surface 62 is kept at small dimensions.</p> |
