JPH02118460U

JPH02118460U -

Info

Publication number: JPH02118460U
Application number: JP2729189U
Authority: JP
Priority date: 1989-03-13
Filing date: 1989-03-13
Publication date: 1990-09-21

Description

[Brief explanation of drawings]

第１図は、本考案の実施例に係るブラシ保持装
置が取付けられたモータの横断面図、第２，３図
は、同実施例にかかるブラシ保持装置の要部断面
図、第４図Ａ，Ｂは、それそぞれ第２，３図に示
すＡ−Ａ線及びＢ−Ｂ線に沿う断面図、第５図は
、従来のブラシ保持装置を取付けたモータの横断
面図、第６図は、第５図に示す−線に沿う断
面図、第７図は、同ブラシ保持装置斜視図である
。９……コンミユテータ、１０，２０……ブラシ
保持装置、１１……ブラシベース、１４……ブラ
シホルダ、１５……ブラシ、２１……ばね部材、
２３……ロツク機構。 FIG. 1 is a cross-sectional view of a motor to which a brush holding device according to an embodiment of the present invention is attached, FIGS. 2 and 3 are sectional views of essential parts of the brush holding device according to the same embodiment, and FIG. 4A , B are cross-sectional views taken along lines A-A and B-B shown in FIGS. 2 and 3, respectively; FIG. 5 is a cross-sectional view of a motor equipped with a conventional brush holding device; The figure is a sectional view taken along the - line shown in FIG. 5, and FIG. 7 is a perspective view of the same brush holding device. 9... Commutator, 10, 20... Brush holding device, 11... Brush base, 14... Brush holder, 15... Brush, 21... Spring member,
23...Lock mechanism.

Claims

[Claims for Utility Model Registration] Brush 1 in sliding contact with rotating commutator 9
5 is movably held by a brush holder 14 attached to a brush base 11, and includes a spring member 21 that elastically presses the brush 15 in the direction of the commutator 9. 21 is made of a shape memory alloy, and a part of the spring member 21 is connected to the brush 9.
When the spring member 21 restores its shape, the spring member 21 A brush holding device for a motor, characterized in that a locking mechanism 23 is formed on the brush base 11 to engage with the member 21 or the brush 15 and prevent the brush 15 from moving in a direction approaching the commutator 9.