| 摘要 |
PURPOSE:To prevent an excess force of contact in a scroll lap, by engaging an eccentric bushing for transmitting a rotational force of a shaft to a rotary scroll with a stopper mechanism for limiting the rotation of the bushing in a boss of the shaft. CONSTITUTION:A shaft 20 for driving a rotary scroll is formed with a boss 20a, and an eccentric bushing 19 is engaged in the boss 20a. A driving force is transmitted through the bushing 19 to a back projection 10 of the rotary scroll. The bushing 19 is formed at its outer periphery with a shoulder, and a stopper 21 is provided in the shaft 20 to project into the boss 20a and engage with the shoulder of the bushing 19. The rotation of the bushing 19 is limited within a fixed angular range by the stopper 21, thereby preventing an excess force of contact in a scroll lap and wear of the members. |
