DC motor

Details DC motor DC motor

1998-06-17

1999-11-09

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 89, 310 61, 310 62, 310 75D, H02K 500

Patent

active

059820640

ABSTRACT:
The DC motor according to the present invention includes one radial ball bearing and a thrust bearing constituted by a shaft receiving member provided on a housing to be abutted by one end of a rotating shaft. Further, a magnetic and/or a spring bias force is applied to the rotating shaft to supplement thrust load bearing force of the thrust bearing. Compared with conventional DC motors in which a rotor is supported by a shaft through a pair of ball bearings which are axially spaced apart from each other, the present invention enables reduction of the overall motor height without harming the rotational stability while simultaneously achieving low production cost.

REFERENCES:
patent: 4613778 (1986-09-01), Wrobel et al.
patent: 5000589 (1991-03-01), Ogata et al.

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