Scroll type compressor with frames supporting the crankshaft

U.S. Patent Number: 5188520

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.

Inventors: Nakamura; Toshiyuki (Shizuoka, JP), Yamamoto; Takashi (Shizuoka, JP), Ogawa; Hiroshi (Shizuoka, JP), Kobayashi; Norihide (Shizuoka, JP), Sano; Fumiaki (Shizuoka, JP), Oide; Masahiko (Shizuoka, JP), Wada; Katsuyoshi (Shizuoka, JP), Ishii; Minoru (Shizuoka, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)

Application Number: 07/721,140

Issued: 1993-02-23

Expired: 2005-02-23

Classes: 418/55.1 ; 29/888.022

Field of search: 418/55.1,55.6 417/902 29/888.022

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