| 摘要 |
PROBLEM TO BE SOLVED: To easily assemble a shaft to a stator core and to prevent the shaft from coming off from the stator core. SOLUTION: A plurality of thin steel plates 22 constituting a rotor core 14 have a hole in which the distance from the central point to the inner periphery is unfixed. The thin steel plates 22 are laminated while changing a phase to the central point by 45 degrees. Therefore, a large-diameter part 56 having a larger distance from the central point becomes spiral and forms a groove 60a of a female screw part 24. The shaft 16 is inserted to a central hole of the rotor core 14 by screwing a male screw part 26 of the shaft 16 to the female screw part 24. COPYRIGHT: (C)2005,JPO&NCIPI
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