Scroll compressor having means for biasing an eccentric bearing

Details Scroll compressor having means for biasing an eccentric bearing Scroll compressor having means for biasing an eccentric bearing

1995-09-18

1996-11-12

Freay, Charles

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 57, F01C 104

Patent

active

055733891

ABSTRACT:
A scroll compressor includes a compression mechanism having a stationary scroll and an orbiting scroll in engagement with each other, a crank shaft for causing orbiting of the scroll relative to the stationary scroll, a bearing member for rotatably supporting the crank shaft and having a thrust bearing for axially supporting the orbiting scroll, an electric motor for driving the crank shaft, and an eccentric bearing radially movably accommodated within a recess defined in an end portion of the crank shaft. The orbiting scroll has a shaft journaled in the eccentric bearing. A leaf spring is interposed between the eccentric bearing and a side wall of the recess for pressing the eccentric bearing radially outwardly. The eccentric bearing has inclined planes defined on an external surface thereof for receiving a biasing force of the leaf spring so that an axial component of the biasing force is directed towards the crank shaft. Instead of forming the inclined planes on the eccentric bearing, an inclined plane may be formed on a pressure member mounted on the eccentric bearing.

REFERENCES:
patent: 4764096 (1988-08-01), Sawai et al.
patent: 5328324 (1994-07-01), Ishii et al.
patent: 5378129 (1995-01-01), Dunaevsky et al.

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