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

Patent metadata

Field	Value
Publication number	US-9780630-B2
Application number	US-201414571926-A
Country	US
Kind code	B2
Filing date	Dec 16, 2014
Priority date	Dec 24, 2009
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

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.

First claim

The invention claimed is:

1. A method of manufacturing a motor rotor, wherein a resolver rotor is fitted onto an outer side of a shaft and the shaft is crimped using a punch abutted thereon, the method comprising:
mounting the resolver rotor onto the shaft, abutting one end face of the resolver rotor on a second stepped portion formed in the shaft;
abutting the punch on a first stepped portion formed in the shaft, and
applying pressure so that the first stepped portion is buckled in a middle of a recess formed near the first stepped portion and on an outer circumferential surface of the shaft contacted by a peripheral hole section of the resolver rotor, and a crimping protrusion deformed and protruded from the first stepped portion abuts the other end face of the resolver rotor.

Assignees

• Toyota Motor Co Ltd

Inventors

• Yasuda Hideaki
• Satake Yasuyuki

Classifications

• H02K15/02 Primary

  of stator or rotor bodies · CPC title

• H02K15/028

  Fastening stator or rotor bodies to casings, supports, shafts or hubs · CPC title

• Y10T29/49012

  Rotor · CPC title

• H02K11/225

  Detecting coils · CPC title

• B21K3/00

  Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like · CPC title