Brush device

Details Brush device Brush device

1993-01-07

1994-07-26

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310242, H02K 1300

Patent

active

053329406

ABSTRACT:
A brush device having a brush holding frame made of an insulation material provided with a plurality of brush accommodating portions which are open at end portions thereof in the axial direction and at inner peripheral portions thereof in the radial direction, and a pair of protruded portions at opposing outer ends thereof in the radial direction; brushes accommodated in the brush accommodating portions along with brush springs, press-contacting a commutator of a direct current machine; an insulation plate touching an end face of the brush holding frame in the axial direction, covering the open portions at the end portions of the brush accommodating portion; and a pair of attaching pieces mounted on and pinching both end faces of the pair of protruded portions of the brush holding frame thereby fixing the insulation plate to the end face of the brush holding frame in the axial direction comprises a pair of stopper protrusion portions protruded in the axial direction provided at intermediate positions situated between the pair of protruded portions in the peripheral direction on the end face of the brush holding frame; and a pair of engaging holes in the insulation plate for pressing in and fixing the pair of stopper protrusions, provided in correspondence therewith.

REFERENCES:
patent: 3493802 (1970-02-01), Barthruff et al.
patent: 4355253 (1982-10-01), Vollbrecht
patent: 4475053 (1984-10-01), Mayer
patent: 4498230 (1985-02-01), Harris et al.
patent: 4673838 (1987-06-01), Takagi et al.
patent: 4746828 (1988-05-01), Nado et al.
patent: 4891539 (1990-01-01), Okamoto et al.
patent: 4926078 (1990-05-01), Isozumi et al.
Journal of Nippondenso Technical Disclosure, Feb. 15, 1990; p. 177.

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