Toyota Jidosha Kabushiki Kaisha

Yasuyuki Satake

Hideaki Yasuda

Masayuki Matsushita

A motor rotor and a method for manufacturing a motor rotor, enabling crimping of the resolver rotor at low cost with less influence on the detection accuracy. A motor rotor includes a resolver rotor and a rotor shaft to which the resolver rotor is affixed by crimping. The rotor shaft includes a first stepped section with which a crimping punch makes contact to deform the first stepped section, a second stepped section with which an end surface of the resolver rotor makes contact, and a cutout groove formed in a surface which is located near the first stepped section and with which an inner peripheral hole section of the resolver rotor makes contact. In the crimping operation, the first stepped section of the rotor shaft is bent within the cutout groove to form a crimping protrusion which presses the end surface of the resolver rotor.

Method for manufacturing motor rotor including a resolver rotor for detecting rotation position

Motor rotor including a resolver rotor for detecting rotation position

A rotor is provided with a rotor core, a shaft fastening hole provided at the center of the rotor core, and magnets provided to the outer circumferential portion of the rotor core. Circular arc slits are formed at intervals on double concentric circles, respectively, so as to be located around the shaft fastening hole of the rotor core. The slits are arranged in such a manner that the outside slits on the outer circle are each located so as to block the portions located in the intervals between adjacent inside slits on the inner circle.

Growing community of inventors

Nagoya, Japan

Yasuyuki Satake