JPH0214271U

JPH0214271U -

Info

Publication number: JPH0214271U
Application number: JP9145488U
Authority: JP
Priority date: 1988-07-12
Filing date: 1988-07-12
Publication date: 1990-01-29

Description

[Brief explanation of the drawing]

第１図及び第２図は本考案の一実施例を示し、
第１図はブラシが摩耗限界達成時の縦断面図、第
２図はブラシが新品状態時の要部縦断面図である
。又、第３図乃至第５図は従来例で、第３図はブ
ラシが新品時のブラシ及び整流子部分の縦断面図
、第４図はブラシが摩耗限界達成時の縦断面図、
第５図は電気回路図である。２，１５……ブラシ、１６……ブラシホルダ、
１９……バネ、２０……目印。 1 and 2 show an embodiment of the present invention,
FIG. 1 is a longitudinal cross-sectional view of the brush when it has reached its wear limit, and FIG. 2 is a longitudinal cross-sectional view of the main part when the brush is in a new state. 3 to 5 are conventional examples, FIG. 3 is a vertical cross-sectional view of the brush and commutator portion when the brush is new, and FIG. 4 is a vertical cross-sectional view when the brush has reached its wear limit.
FIG. 5 is an electrical circuit diagram. 2, 15...brush, 16...brush holder,
19...spring, 20...mark.

Claims

[Scope of utility model registration request]

A spring with a U-shaped cross section and a mark on the surface of one end, and the other end of the spring are fixed to a brush holder with a brush slidably housed inside, and the abdomen of the spring presses the side of the brush to prevent brush wear. A brush wear detection device characterized in that the mark of the spring moves on the surface of the brush head for detection.