Patent ID: 6420805
Filing Date: 2002-07-16
Classification: H02K

Abstract:
A brushless motor having a torque transfer member, the brushless motor comprising:a rotor case having opposed inside and outside surfaces and a diameter, the rotor case including a concave portion in the outside surface and an integral support portion including an opening through the rotor case and oblique parts of the rotor case adjacent the opening that project outwardly from the rotor case; a torque transfer member disposed on the outside surface of the rotor case and having a bottom surface partly accommodated, in a thickness direction, in the concave portion of the outside surface of the rotor case, in contact with the outside surface of the rotor case, filling the opening and embedding the oblique parts of the rotor case to prevent the torque transfer member from moving in axial and radial directions during rotation of the rotor case, and having a diameter smaller than the diameter of the rotor case; a magnet mounted on and inside the rotor case; an axle supporting the rotor case; a resin axle holder supporting the axle; a stator base including opposed inside and outside surfaces, a hole directly opposite the axle, and an oblique portion adjacent the hole as a support piece; a bridge embedded in the resin axle holder directly opposite the axle and strengthening engagement of the stator base and the axle holder, the axle holder upstanding from the inside surface of the stator base and protruding through the hole in the stator base with the support piece embedded in the resin axle holder; and a stator mounted on the inside surface of the stator base and having an armature coil for rotationally driving the magnet.