Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1991-03-02
1993-06-01
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 89, H02K 516
Patent
active
052163075
ABSTRACT:
An electric motor has a motor shaft which is rotatably supported at its base end by a motor yoke and which carries a core member. The motor includes a gear such as a worm gear press-fitted to a free end portion of the motor shaft, a front frame which is secured to a front opening of the motor yoke and which has a substantially cylindrical portion having a shaft hole through which the motor shaft extends and a bearing mounted on the motor shaft at a position between the gear and the core member, the bearing having limited axial movement along the motor shaft. The bearing structure of this motor for supporting the motor shaft is characterized in that the cylindrical portion has an inner surface corresponding to an outer surface of the bearing so that the bearing can be axially moved in the cylindrical portion, the inner peripheral surface of the cylindrical portion further being chamfered at a bottom portion thereof in conformity with the outer surface of the bearing so as to prevent the bearing from rotating relative to the cylindrical portion once the bearing has been axially moved to the bottom portion of the cylindrical portion. The shaft hole has a diameter greater than the outside diameter of the gear but smaller than the diameter of the bearing.
REFERENCES:
patent: 4494027 (1985-01-01), Otto
patent: 4688324 (1987-08-01), Morrill
patent: 5089736 (1992-02-01), Oyafuso
Mitsuba Electric Mfg. Co. Ltd.
Nguyen Matthew
Stephan Steven L.
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