| 摘要 |
PURPOSE:To suppress the early abrasion and improve the reliability in high pressure compression by forming a plurality of recessed parts on the opposed surfaces between a fixed lace fixed onto a housing and a movable rail fixed onto a movable scroll member and installing a ball element between the opposed recessed parts. CONSTITUTION:An annular engagement stepped part is formed at the joint part between a center housing 1 and a front housing 2, and a fixed lace 15 is arranged in turning-disabled form. A suction chamber A is formed on the front housing 2 side, and a working chamber B is formed on the center housing 1 side, having the fixed lace 15 as boundary. A movable lace 16 is fixed by a key, etc., onto the back surface of the basic plate 12a of a movable scroll member 12, opposed to the fixed lace 15. A plurality of recessed parts 17 and 18 having circular side surface are formed at each position in the circumferential direction permitting the mutual superposition in the case when each center of the laces 15 and 16 is allowed to coincide, and a rotation suppressing mechanism is constituted by interposing a ball element 19 between the opposed recessed parts 17 and 18. |
