Scroll type compressor having stepped assembling portions on the

Details Scroll type compressor having stepped assembling portions on the Scroll type compressor having stepped assembling portions on the

1991-10-04

1993-06-01

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

417410R, 417902, 29888022, F04C 1804, F04B 3912

Patent

active

052154513

ABSTRACT:
A scroll type compressor comprising: which has a peripheral portion formed with a flange, which has the fixed scroll fixed on the flange, which has a bearing at a central portion, and which has an outer peripheral surface formed with a stepped portion; a crankshaft which is rotatably supported at its upper portion by the frame bearing and which supports an electric motor rotor at a central portion; a subframe which has a central portion formed with a bearing for rotatably supporting the crankshaft at its lower end; a center shell which has an upper inner peripheral surface formed with a stepped portion engageable with the stepped portion in the frame, which has the frame shrinkage fitted thereto, shells which are connected to both ends of the center shell to form a hermetic housing; wherein the center shell has a lower inner peripheral surface formed with a stepped portion, the stepped portion in the upper inner peripheral surface and the stepped portion in the lower inner peripheral surface are formed to keep predetermined parallelism and coaxiality, and the subframe is fixed to the stepped portion in the lower inner peripheral surface.

REFERENCES:
patent: 4552518 (1985-11-01), Utter
patent: 4702683 (1987-10-01), Inaba et al.
patent: 4767293 (1988-08-01), Caillat et al.
patent: 5000669 (1991-03-01), Shimizu et al.

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