Patent ID: 7652402

Claim:
A brushless motor comprising: a stator fixedly provided within a motor housing and a rotor fixed to a rotation shaft in which a plurality of coils wound around a stator magnetic-pole core are connected together and connected to output wires by use of a bus bar, wherein: the bus bar includes a body portion formed of an insulating member and having grooves formed therein, and wiring bars each of which is formed of an electrically conductive metal and has integrally formed connection terminals and which are disposed in the grooves; the coils are wound around the stator magnetic-pole core such that clearances are formed within magnetic-pole core slots; the bus bar is disposed at one axial end of the stator magnetic-pole core with an axial clearance formed between the bus bar and the coils, and the body portion has such a radial dimension that at least a portion of the clearances within the magnetic-pole core slots is left uncovered; said bus bar having legs integrally formed with said body portion, said legs being inserted into axially extending core grooves, said axially extending core grooves being provided on an outer circumferential surface of said stator magnetic-pole core, said legs of said bus bar connecting said body portion to said stator magnetic-pole core; and air holes are formed in the motor housing on opposite sides of the stator magnetic-pole core to thereby form cooling air passages extending through the magnetic-pole core slots.