Patent ID: 11962198
Assignee: MITSUBA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. An electric motor comprising: a stator which is housed in a motor case, and a rotor which comprises a shaft being rotatably supported by the motor case and a rotor body portion having a magnet disposed inside the stator, wherein
the electric motor has a magnet cover comprising: a circular cylinder portion which covers an outer peripheral surface of the magnet; a turned-back portion which is arranged in one end portion of the circular cylinder portion and is in contact with one end surface of the rotor body portion; and a fastening end portion which is fastened to a flange portion arranged on the shaft so as to cover the other end surface of the rotor body portion;
an engagement latch portion engaged with the rotor is arranged on the turned-back portion; and
an inner diameter of the circular cylinder portion is greater than an outer diameter of the magnet, wherein the electric motor has a rotor core in which an engagement hole extending in an axial direction is arranged and which is mounted between a magnet mounting portion of the shaft and the magnet, and the engagement latch portion extends in the axial direction from the turned-back portion and is engaged with an inner surface in a circumferential direction of the engagement hole,
wherein a press-fitted portion which is press-fitted into an inner peripheral surface of the engagement hole is arranged in a base end portion of the engagement latch portion; and a guide portion is arranged in a top end portion of the engagement latch portion, wherein the guide portion has a width in the circumferential direction smaller than that of the press-fitted portion, and guides the engagement latch portion when the engagement latch portion is inserted into the engagement hole.