Patent ID: 8963387
Filing Date: 2015-02-24
Classification: B21K,H02K,Y10T

Abstract:
1. A motor rotor includes a resolver rotor for detecting a rotation position, and a shaft crimped to the resolver rotor, wherein the shaft includes a first stepped portion to be deformed by a punch abutting thereon during crimping, a second stepped portion to which an end face of the resolver rotor is abutted, and a recess formed close to the first stepped portion and in a surface contacted by a circumferential inner hole of the resolver rotor, wherein, when the shaft is crimped to the resolver rotor, the first stepped portion of the shaft is buckled in a middle of the recess by the punch, forming a crimping protrusion deformed and protruding from the first stepped portion, so that the crimping protrusion presses the end face of the resolver rotor, wherein the recess of the shaft includes a first recess and a second recess formed to overlap the first recess, and the second recess is formed closer to the first stepped portion than the first recess, and an angle made between an inner surface of the second recess and an outer circumferential surface of the shaft is smaller than an angle made between the first recess and the shaft.