| 摘要 |
PROBLEM TO BE SOLVED: To prevent vanes from becoming caught in a suction port in a variable displacement vane pump.SOLUTION: A variable displacement vane pump 100 that is used as a fluid pressure source comprises: a rotor 2 rotatably driven; a plurality of vanes 3 slidably housed in the rotor 2; a cam ring 4 that has an inner peripheral cam surface 4A in sliding contact with end parts 3A of the vanes 3 and can be made eccentric with respect to the center of the rotor 2; pump chambers 5 defined by the rotor 2, the cam ring 4, and the adjacent vanes 3; a suction port 21 that guides working fluid to be sucked into the pump chambers 5; and a discharge port 22 that guides the working fluid to be discharged from the pump chambers 5. An opening outer periphery 21D of the suction port 21 is formed so as to be located along the inner peripheral cam surface 4A of the cam ring 4 or outside the inner peripheral cam surface 4A regardless of the amount of eccentricity of the cam ring 4 with respect with the rotor 2. |
