SWASH PLATE TYPE PISTON PUMP MOTOR AND METHOD FOR MANUFACTURING THE SAME

摘要

[PROBLEMS] To enhance seizure resistance and abrasion resistance of a swash plate supporting base while enhancing productivity and quality. [MEANS FOR SOLVING PROBLEMS] A plurality of pistons (10) are arranged in the circumferential direction on a cylinder block (9) rotating together with a rotating shaft (5) and guided along a swash plate (12) to perform reciprocal motion as the rotating shaft (5) rotates. A protrusion (32) of the swash plate (12) is supported by a recess (22) in a swash plate supporting base (20) to incline freely and a wall (2e) formed integrally with the swash plate supporting base (20) is arranged at least partially on the normal to the supporting surface (22a) of the recess (22). In the method for manufacturing such a swash plate type piston pump motor (1), a supporting surface (22a) of the recess (22) in the swash plate supporting base (20) is irradiated with laser light beams (L1, L2) while scanning and quenched, and the output of the laser light beams (L1, L2) is varied depending on the incident angles (a1, a2) of the laser light beams (L1, L2) to the supporting surface (22a).