Miniature motor and method for manufacturing the same

Details Miniature motor and method for manufacturing the same Miniature motor and method for manufacturing the same

2005-02-08

2005-02-08

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S091000

Reexamination Certificate

active

06853104

ABSTRACT:
A miniature motor includes a closed-bottomed cylindrical motor casing having a cylindrical bearing support portion projecting from a central portion of the bottom of the motor casing, a motor-casing-side bearing accommodated in the bearing support portion, a casing cover fitted to an open end portion of the motor casing, a casing-cover-side bearing accommodated in a central portion of the casing cover, and a rotor rotatably supported by means of the motor-casing-side bearing and the casing-cover-side bearing. The end face of the motor-casing-side bearing is concentrically polished at at least a portion which, when the rotor is urged toward the motor casing, abuts a washer provided on a shaft of the rotor. The above structure reduces sliding loss on the end face of an oil-impregnated bearing which receives a thrust load of the rotor generated due to rotation of the motor.

REFERENCES:
patent: 4185214 (1980-01-01), Gerber et al.
patent: 4326758 (1982-04-01), Nozue et al.
patent: 4437215 (1984-03-01), Nozue et al.
patent: 5678299 (1997-10-01), Mochizuki et al.
patent: 20040061282 (2004-04-01), Stemmle

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