Patent ID: 7737592
Filing Date: 2010-06-15
Classification: H02K

Abstract:
1. A motor comprising: a shaft arranged concentrically about a central axis; a rotor core including an inner circumferential surface affixed to an outer circumferential surface of the shaft; at least one rotor magnet retained by the rotor core; an end plate arranged at least one end surface of the rotor core in an axial direction, and including an inner circumferential surface opposite to the shaft; and a fixing member connecting the end plate to the rotor core; wherein the shaft includes a rotor core fixing portion arranged to secure the rotor core and a flange portion arranged at one end in the axial direction of the rotor core, the flange portion having an outer circumferential surface whose radius centered around the central axis is greater than a radius of an inner circumferential surface of the rotor core fixing portion; the radius of the outer circumferential surface of the flange portion is greater than the radius of an inner circumferential surface of the end plate; and the flange portion is arranged in an axial space between the end plate and the rotor core fixing portion.