Brush holder for a brush assembly for a power tool motor

摘要

A power tool is provided including a tool housing in which an electric motor is disposed. The electric motor includes a stator and an armature rotatably received within the stator. The armature has an armature shaft on which a commutator is mounted. The power tool further includes at least one brush assembly disposed around the commutator, the brush assembly including: a brush having two grooves on opposites surfaces therein; a brush holder comprising two support plates arranged defining guiderails that extend into the grooves of the brush to facilitate movement of the brush along a single axis; and a spring contacting the brush that urges the brush radially inwardly along the axis.

主权项

1. A power tool comprising:
a tool housing in which an electric motor is disposed, the electric motor including a stator and an armature rotatably received within the stator, the armature having an armature shaft on which a commutator is mounted; and at least one brush assembly disposed around the commutator, the brush assembly including: a brush having two grooves on opposites surfaces therein; a brush holder comprising two support plates arranged defining guiderails that extend into the grooves of the brush to facilitate movement of the brush along a single axis; and a spring contacting the brush that urges the brush radially inwardly along the axis, wherein the tool housing includes at least one opening adjacent the commutator through which the brush is disposed, and two oppositely-arranged slots formed around the periphery of the opening to receive two end portions of the support plates of the brush holder to securely maintain the brush holder in the tool housing.