| 摘要 |
A stator core having a circular outer circumference is locked to an inner circumferential surface of a cylindrical housing. A first groove is formed in the outer circumference of the stator core, and a second groove is formed in the inner circumference of the housing. A plate spring is used as a key that is interposed between the first and second grooves so as to apply a spring force to at least one of the first and second grooves. This construction reduces the stress that occurs in the key grooves due to insertion of the key. |
