Patent ID: 7141907

Claim:
A bracket assembly of a universal motor comprising: a bracket including a base portion coupled to a motor stator; a plurality of supporting portions extendingly formed at the base portion; a bearing mounting portion extendingly formed at an end of the supporting portions, for inserting a bearing thereto; a plurality of holder portions extendingly formed at the base portion and having a heat emission insertion hole therein for inserting a brush and emitting heat; a plurality of spring mounting portions; and a plurality of mounting portions formed at the base portion; brushes respectively inserted into the holder portions; a sensor mounting portion formed at the bearing mounting portion of the bracket; a tachometer for detecting a rotation speed of a rotation shaft inserted into the sensor mounting portion as one side thereof is fixedly-coupled and another side therof is coupled by a screw; and springs respectively coupled to the spring mounting portions of the bracket, for elastically supporting the brush, wherein a respective holder portion includes a slit formed at only one side of the respective holder portion for receiving a corresponding spring to elastically support an inserted brush and the bracket is formed of a plastic material, and wherein the sensor mounting portion includes: first and second arc protrusions extendingly formed at an outer circumferential surface of the bearing mounting portion as an arc shape; an inserting slit formed at one side of the first arc protrusion, for inserting one side of the tachometer; and a screw hole formed at the bearing mounting portion, for coupling the screw.