Electric motor
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United States of America Patent
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Oct 23, 2018
Grant Date -
Jul 7, 2016
app pub date -
Sep 2, 2014
filing date -
Sep 6, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An object of the present invention is to provide an electric motor which can prevent electric noise generated from a contact between a brush and a commutator from being radiated and diffused to the outside. An electric motor comprises: an armature shaft 28; a coil 29b attached to the armature shaft 28; a commutator 30 attached to the armature shaft 28, and electrically connected to the coil 29b; a brush through which an electric current is supplied to the commutator 30; a conductive shaft bearing 35 configured to rotatably support the armature shaft 28; a yoke 26 incorporated with the shaft bearing 35, and electrically connected to a ground conductor; a conductive shaft bearing 34 arranged in a direction along a center line of the armature shaft 28, different in position from the shaft bearing 35, and configured to rotatably support the armature shaft 28; and a contact plate 51 electrically connected to the shaft bearing 34, and electrically connected to the ground conductor.
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