US 4,638,204 AGranted

Hammer brush holder assembly for a commutator motor

AssigneeSiemens Aktiengesellschaft

InventorsAlbert Kirchner, Juergen Schoen, Ortwin Happ

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Abstract

A hammer brush holder assembly can be easily fabricated and assembled by robot automation using only a few simple steps. The brush holder has at least two brush support arms swivel-mounted at one end in a brush rocker and pressed against a commutator by a tension spring via the brushes which are held at the other end of the brush rocker. The brush support arms with sleeve-shaped ends can be slipped axially onto lugs molded in an axial fashion to the brush rocker and locked in place. Both brush support arms are connected as parts of a single-piece plastic injection-molded component with an integral breakaway bridge segment which holds both brush support arms to a preselected mutual spacing. The breakaway bridge segment can be eliminated after installation of the hammer brush support assembly in the commutator motor.

Claims12

Dependent claims

A hammer brush holder for a commutator motor having a brush rocker, fastened to a housing of the commutator motor, with axially extending mounting means integrally molded on said brush rocker at one axial end, and a brush support arm swivel-mounted in a fixed axial position onto another end of each respective mounting means, the improvement comprising:

a brush fastened to each brush support arm respectively, and located at an end of said brush support arm opposite said swivel mounting;
each mounting means defining a lug respectively;
and
a mounting means molded in one piece on the axial ends of the brush rocker in the interior of the housing, said means being molded in one piece on the brush lug;
and
each brush support arm having a sleeve-shaped end means for swivel-mounting on and encompassing said respective lug, integrally molded thereon, whereby the sleeve-shaped end means slides onto the lug up to an axially positioning groove connection with the brush rocker.

3 more elements

Dependencies are inferred from the claim text.