BRUSH ASSEMBLY HAVING IMPROVED BRUSH PROFILE FOR AN ELECTRIC MOTOR

摘要

An electric motor is provided including a stator and an armature rotatably received within the stator, the armature having an armature shaft on which a commutator is mounted. The motor also includes a brush assembly having a brush card mount disposed around the commutator, a brush holder mounted on a surface of the brush card mount, and a brush disposed within the brush holder in sliding contact with the commutator to supply electric current to the commutator. A back surface of the brush includes at least one curved surface and a groove. A torsion spring is secured to the brush card mount adjacent the brush holder, the spring having a leg arranged to engage the groove of the back surface of the brush.

主权项

1. An electric motor comprising:
a stator; an armature rotatably received within the stator, the armature having an armature shaft on which a commutator is mounted; and a brush assembly comprising:
a brush card mount disposed around the commutator;a brush holder mounted on a surface of the brush card mount;a brush disposed within the brush holder in sliding contact with the commutator to supply electric current to the commutator, wherein a back surface of the brush includes a curved surface and a groove; anda torsion spring secured to the brush card mount adjacent the brush holder, the spring having a leg arranged to engage the groove of the back surface of the brush.