Minature motor with improved bearing retainers

Details Minature motor with improved bearing retainers Minature motor with improved bearing retainers

1992-05-28

1993-10-05

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 384 13, H02K 516, F16C 3310

Patent

active

052508625

ABSTRACT:
A miniature motor comprising a housing made of a metallic material, formed into a bottom hollow cylindrical shape, and having a permanent magnet on the inner circumferential surface thereof, a rotor consisting of a commutator and an armature facing the permanent magnet, and an end plate fitted to the opening of the housing and having brushes for making sliding contact with the commutator and input terminals for electrically connecting to the brushes; the rotor being rotatably supported by oil-impregnated bearings fixedly fitted to bearing retainers each provided on the bottom of the housing and the endplate; in which a plurality of local projections are provided on the inside end faces of the bearing retainers, and the oil-impregnated bearings are positioned and held in place by bringing the end faces of the oil-impregnated bearings into contact with the local projections.

REFERENCES:
patent: 4006374 (1977-02-01), Nakagawa
patent: 4500804 (1985-02-01), Akiyama
patent: 4634298 (1987-01-01), Crawford

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