Scroll type compressor having an oil supply path for the eccentr

Details Scroll type compressor having an oil supply path for the eccentr Scroll type compressor having an oil supply path for the eccentr

1997-05-30

2000-01-11

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 556, 418 88, 418 94, F04C 1804, F04C 2902

Patent

active

060129115

ABSTRACT:
The present invention provides a scroll-type compressor that can supply sufficient lubricating oil without the occurrence of seizure of bearing for an orbiting scroll. In this scroll-type compressor, an annular boss 23 extends downward from the orbiting scroll, and an eccentric pin 53 of a rotating shaft 5 fits into the boss 23 via a bearing 73 and an eccentric bush 54. A gap 58 is provided between the eccentric pin 53 and the eccentric bush 54, and an oil supply path 57 is provided between the eccentric bush 54 and the bearing 73. The lubricating oil flows out of an oil supply hole 52 formed in a rotating shaft 5 and the eccentric pin 53, being supplied to the bearing 73, etc. via the oil supply path 57. In order to sufficiently supply the lubricating oil to the oil supply path 57, a portion 54f extending in an arcuate shape from the upper end face of the eccentric bush 54 forms a protrusion extending upward from the other flat portion 54d. The protrusion 54f may be formed in an annular shape along the inner peripheral surface of the eccentric bush 54, or a flat plate member 59 may be provided to close the gap 58 from the downside without providing the protrusion 54f.

REFERENCES:
patent: 4997349 (1991-03-01), Richardson, Jr.
patent: 5197868 (1993-03-01), Caillat et al.

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