Patent ID: 6822364
Filing Date: 2004-11-23
Classification: H02K

Abstract:
A brushless motor comprising:a cylindrical motor housing; a stator fitted in the motor housing, wherein the stator includes: a ring-shaped outer core having a plurality of protrusions formed on the outer circumferential surface of the outer core, and, when the stator is inserted in the motor housing, each protrusion is press-fit to the inner circumferential surface of the motor housing; a plurality of teeth, which extend in the radial direction of the stator, wherein each tooth has a radially outward end and a radially inward end, wherein the radially outward end of each tooth is coupled with the outer core, and wherein each tooth has a predetermined width in the circumferential direction of the stator, wherein each protrusion is arranged on a radial line that corresponds to one of the teeth in the circumferential direction of the stator, with each protrusion located on the center of the width direction of the corresponding tooth; and a ring-shaped coupler, which couples the radially inward ends of the teeth; a fitting portion located on the inner circumferential surface of the motor housing; and a fitted portion located on the outer circumferential surface of the outer corre, wherein the fitted portion is arranged on a radial line that passes through the center of the width portion of one of the teeth, and wherein the fitting portion is fitted to the fitted portion to determine the position of the stator with respect to the motor housing in the circumferential direction.