Patent ID: 7986068
Filing Date: 2011-07-26
Classification: H02K

Abstract:
1. A motor comprising: a rotatably supported shaft; and a rotor section press-fitted and fixed coaxially to said shaft, wherein said rotor section is provided with: a rotor yoke; a housing hole that is formed on an end surface of said rotor yoke along the axial direction of the shaft; a permanent magnet housed within said housing hole; and a pair of end surface plates: that have a ring-shaped plate that is provided so as to cover at least an opening section of said housing hole and that is made of a non-magnetic material, and a supporting plate that supports said ring-shaped plate, that is press-fitted and fixed on said shaft, and that has a coefficient of linear expansion equivalent to that of said shaft; that are provided on axial end portions of said rotor yoke; and that clamp said rotor yoke so as to hold said permanent magnet within said housing hole.