| 摘要 |
<p>PURPOSE:To suppress the beating noise due to the collision between a piston connection part and the outer peripheral surface of a swash plate and reduce noise by forming thinned parts so as to offset the revolution imbalance around a piston shaft, onto the outer periphery in the vicinity of the connection part of the piston. CONSTITUTION:A swash plate 2 is fixedly installed onto a shaft 1. A piston 5 is retained onto the swash plate 2 through slippers 3a and 3b and balls 4a and 4b which act as universal joints. Thinned parts 5c and 5c' are formed on the outer peripheries of 5b and 5b' in the vicinity of the connection part 5a of the piston 5 so as to offset the revolution imbalance around a piston shaft due to the weight of a piston connection part 5a. The turning moment due to the weight of the piston connection part 5a is softened, and the beating sounds due to the collision between the piston connection part 5a and the outer peripheral surface of the swash plate 2 can be reduced. Thus, noise can be reduced.</p> |
