| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotor core which does not change an outer dimension during rotations and achieves stable motor output, and to provide a manufacturing method of the rotor core.SOLUTION: After rod like members (pins) 22 are inserted into a through hole formed at each core plate piece in the non rotating state, core plates 11 are extended in an outer diameter direction and are fastened by welding or the like with the rod like members (pin) 22 crimped to the respective through holes 19. Fastening parts 25 are formed in the lamination direction of each core plate and fasten the core plates maintaining the state of the rotor core 10B being extended. |
