VARIABLE DISPLACEMENT SWASH PLATE TYPE PISTON PUMP AND METHOD FOR MANUFACTURING VARIABLE DISPLACEMENT SWASH PLATE TYPE PISTON PUMP

摘要

PROBLEM TO BE SOLVED: To suppress peeling of a slide surface of a bushing.SOLUTION: The whole circumference of the inner surface 40a of a groove 40 is in a tapered shape that is inclined toward a virtual straight line L2 according as separating from a slide surface 25a. Therefore, the pressure of hydraulic oil supplied in the groove 40 acts on the inner surface 40a of the groove 40 in a direction separating from the slide surface 25a, namely toward a base part 45 side with respect to the inner surface 40a of the groove 40. Then, the pressure of hydraulic oil supplied in the groove 40 acts to adhere a resin part 46 to a base part 45 so that peeling of the resin part 46 with respect to the base part 45 is suppressed. Accordingly, peeling of the slide surface 25a of a bushing 25 is suppressed.SELECTED DRAWING: Figure 5