JPS58143473U

JPS58143473U - brush device

Info

Publication number: JPS58143473U
Application number: JP3922582U
Authority: JP
Inventors: 橋本　芳男
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 1982-03-19
Filing date: 1982-03-19
Publication date: 1983-09-27

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来技術に係る直流モータの断面図、第２図は
固定磁石の斜視図、第３図は従来技術に係るブラシ部分
の拡大断面図、第４図は本考案に係るブラシ部分の拡大
断面図、第６図は従来技術と本考案との関係をブラシ圧
接力とブラシ摩耗量との比較で説明したグラフ、第６図
は従来技術と本考案について寿命時間で比較したグラフ
、栢７図はコミュテータ正端部の面取り効果を説明した
図である。２・・・・・・コミュテータ、３・・・・・・固定磁石
、２０・・・・・・ブラシ、２１・・・・・・磁石、２
２・・・・・・ブラシブロック、２３・・・・・・ブラ
シガイド。Fig. 1 is a sectional view of a DC motor according to the prior art, Fig. 2 is a perspective view of a fixed magnet, Fig. 3 is an enlarged sectional view of a brush part according to the prior art, and Fig. 4 is a sectional view of a brush part according to the present invention. An enlarged cross-sectional view, Fig. 6 is a graph explaining the relationship between the conventional technology and the present invention by comparing brush pressure contact force and brush wear amount, Fig. 6 is a graph comparing the conventional technology and the present invention in terms of life time. FIG. 7 is a diagram illustrating the chamfering effect at the front end of the commutator. 2... Commutator, 3... Fixed magnet, 20... Brush, 21... Magnet, 2
2... Brush block, 23... Brush guide.

Claims

[Claims for Utility Model Registration] 1. In a DC motor having a commutator rotatably provided inside a ring-shaped fixed magnet and a brush provided in pressure contact with the outer circumferential surface of the commutator, It has a brush guide fixed to a stationary member with the opening facing the surface, and a columnar brush block with a magnet bonded to one end of the brush, and the brush block slides with the brush exposed in the brush guide. A brush device, wherein the brush guide is freely mounted, and the brush guide is installed at a position where the magnet of the brush block receives a magnetic repulsion force in relation to the fixed magnet. 2. A brush device according to claim 1 of the utility model registration, characterized in that the outer peripheral end corner of the commutator is chamfered in a tapered shape.