Patent ID: 9178397
Filing Date: 2015-11-03
Classification: H02K

Abstract:
1. A brushless motor comprising: a stator including a core formed with a plurality of tooth parts arranged in a circumferential direction, a coil set wound on the core, and an insulator holding the core and the coil set while providing insulation therebetween, the stator generating a rotating magnetic field in response to supply of current to the coil set; and a rotor including magnetic poles, which oppose the stator in a radial direction from an inside of the stator and are magnetized to different polarities alternately in the circumferential direction, wherein the coil set is formed of a plurality of coils wound about the plurality of tooth parts and a plurality of crossing wires connecting the coils in the circumferential direction, wherein the insulator of the stator is formed of a plurality of ring parts stacked in the axial direction, wherein the plurality of ring parts has guide projections forming a crossing wire holder part, which holds the crossing wire in the axial direction, wherein at least a part of the crossing wire holder part is formed of a combination of the guide projections of different ring parts, and wherein the plurality of crossing wires is stacked in the axial direction in a manner that the crossing wires and the ring parts are stacked alternately.