ROTARY ELECTRIC MACHINE

摘要

A rotor core formed with a shaft hole at the center thereof is provided. A cylindrical member fitted into the shaft hole of the rotor core along an outer peripheral surface of the cylindrical member is provided. A drive shaft inserted into a hollowed part of the cylindrical member (collar) is provided. The collar is made of the material having a lower Young's modulus than those of the rotor core and the drive shaft, and is formed such that an inner peripheral surface of the collar is a tapered surface. The drive shaft has, at an outer periphery thereof, a tapered surface such that the tapered surface is in surface contact with the tapered surface of the collar in fitting of the drive shaft into the collar.

主权项

1. A rotary electric machine comprising:
a rotor core in which a shaft hole is formed at a center of the rotor core; a cylindrical member formed in a cylindrical shape and fitted into the shaft hole of the rotor core along an outer peripheral surface of the cylindrical member; and a drive shaft inserted into a hollowed part of the cylindrical member, wherein the cylindrical member is made of a material having a lower Young's modulus than those of the rotor core and the drive shaft, and is formed such that an inner peripheral surface of the cylindrical member is a tapered surface, and the drive shaft has, at an outer periphery thereof, a tapered surface such that the tapered surface is in surface contact with the tapered surface of the cylindrical member in fitting of the drive shaft into the cylindrical member.