Aisin Corporation

Amino Corporation

Yutaka Hara

Takaaki Kawashima

Mariko Saito

Noriyuki Watanabe

Yuji Terauchi

Takehiko Adachi

A rotor includes: a shaft having a tubular shape; and a rotor core including a through hole into which the shaft is inserted and that has a regular polygonal shape. The shaft is fixed to the rotor core by hydroforming. Of an outer peripheral surface of the shaft, a core contact part that is in contact with the through hole of the rotor core that has the regular polygonal shape has a shape extending along the regular polygonal shape.

Manufacturing method of rotor

The rotor manufacturing method includes the step of fixing a shaft to a rotor core by hydroforming. The shaft has a cylindrical shape in which an inside diameter of a first portion of the shaft to be placed on an inner peripheral surface of a shaft insertion hole is larger than an inside diameter of a second portion of the shaft located on one side in a rotation axis direction relative to the first portion.

Rotor manufacturing method

This rotor manufacturing method includes the steps of: pressing a rotor core in a central axis direction by using a core pressing member; and fixing a shaft to the rotor core by performing, with the rotor core pressed, hydroforming that involves pressure-welding the shaft to an inner peripheral surface of a shaft insertion hole.

Growing community of inventors

Kariya, Japan

Yutaka Hara