Brush-equipped motor and method of exchanging brushes thereof
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United States of America Patent
Stats
-
Mar 9, 2004
Grant Date -
Mar 13, 2003
app pub date -
Sep 6, 2002
filing date -
Sep 10, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
It is to provide a brush-equipped motor enabled to be used for a long time without performing operations and without interruption even when the brush wears out. When a rotor is caused to perform a turning operation, cam projections similarly start to perform a turning operation. Then, an abutting part, at which each of the cam projections contacts with a spring piece part of a corresponding one of the first brushes, gradually moves to an end of the first brush. Thus, the spring piece part of each of the first brushes is gradually and elastically deformed in a direction in which brush bodies come away from a commutator. When the turning operation continues still more, an end of each of the second brushes comes off a corresponding one of the cam projections, so that the brush bodies thereof contact with the surface of the commutator.
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Cited Art Landscape
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