Patent ID: 9225211
Filing Date: 2015-12-29
Classification: H02K

Abstract:
1. A rotor structure of a rotary machine, comprising: a shaft; and a rotor fastened at an outer peripheral surface of said shaft, the rotor having permanent magnets embedded therein, wherein a positioning key is formed at an inner peripheral wall of said rotor, said positioning key extending radially inward toward an axis of said rotor and having a bottom portion and side portions, wherein a key groove, into which said positioning key is fitted, is formed at an outer peripheral surface of said shaft extending radially inward toward the axis of said rotor, wherein a concave portion is formed with respect to both of said sides of said positioning key, respectively, wherein said key groove is formed at said inner wall of said rotor engaging with said bottom portion and part of said side portions, without engaging with said concave portion.