Patent ID: 6146117
Filing Date: 2000-11-14
Classification: F01C,F04C

Abstract:
A scroll hydraulic machine comprising:a fixed scroll;a swirling scroll performing a revolutionary swirling motion while engaging with the fixed scroll;an Oldham joint being made of a ferrous alloy and having a key for causing the swirling scroll to move in a revolutionary swirling motion while preventing the swirling scroll from rotating;an aluminum front case structured such that a key groove portion to which the key of the Oldham joint is fitted and a portion supporting a thrust force acting on the swirling scroll are made of a ferrous alloy so that, even when lubricating oil slightly runs out, abnormal abrasion of the key groove does not occur; anda case body for housing the fixed scroll, the swirling scroll, and the Oldham joint within a housing formed by attaching the front case to an opening portion of an end thereof without a thrust bearing located between the front case and the swirling scroll.