Scroll type compressor with frames supporting the crankshaft

Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll

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29888022, F04C 1804

Patent

active

051885204

ABSTRACT:
A scroll type compressor comprising: a fixed scroll and an orbiting scroll which have their base plates provided with wraps thereon, the wraps being combined to form a compression chamber therebetween; a frame for fixedly supporting the fixed scroll, the frame having a bearing at a central portion; a crankshaft supported by the frame bearing to be rotatable, and having an electric motor rotor to give torque to the orbiting scroll; a subframe having a central portion provided with a bearing for supporting a lower end of the crankshaft; a center shell having a terminal member and an electric motor stator, having an inner peripheral surface formed with a stepped portion to be engaged with a stepped portion formed on an outer peripheral surface of the frame, the center shell having the frame fixed thereto by shrinkage fit at a location above or below the stepped portion of the center shell, and also having the subframe fixed to a lower end thereof; and concentric assemblage jig mounting portions formed in the frame and the subframe, respectively, to be concentric with the bearings.

REFERENCES:
patent: 4431388 (1984-02-01), Eber et al.
patent: 4552518 (1985-11-01), Utter
patent: 4702683 (1987-10-01), Inaba et al.
patent: 4743181 (1988-05-01), Murayama et al.
patent: 4767293 (1988-08-01), Caillat et al.

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