Patent ID: 7569959
Filing Date: 2009-08-04
Classification: H02K

Abstract:
1. A motor, comprising: a field body having a plurality of field poles; an armature body having a plurality of coils which is placed outside the field body in a radial direction; a commutator which is secured to the armature body, the commutator having a plurality of segments to which the coils are respectively connected, where the commutator is in annular form and the segments are aligned in a circumferential direction; a power supplying part for supplying a current to the coils, the power supplying part being in annular form; and a brush holder containing an anode side brush device which makes contact with and slides against the commutator and the power supplying part, and a cathode side brush device which makes contact with and slides against the commutator and the power supplying part, the brush holder being secured to the field body, wherein the brush devices are arranged between the commutator and the power supplying part, wherein the anode side brush device comprises: an anode side commutating brush which makes contact with and slides against the commutator; an anode side power supplying brush which makes contact with and slides against the power supplying part; and a first urging part for urging the anode side commutating brush and the anode side power supplying brush in opposite directions, and wherein the cathode side brush device comprises: a cathode side commutating brush which makes contact with and slides against the commutator; a cathode side power supplying brush which makes contact with and slides against the power supplying part; and a second urging part for urging the cathode side commutating brush and the cathode side power supplying brush in opposite directions.