Rotor and manufacturing process of rotor

Patent metadata

Field	Value
Publication number	US-9178394-B2
Application number	US-201313735138-A
Country	US
Kind code	B2
Filing date	Jan 7, 2013
Priority date	Aug 7, 2012
Publication date	Nov 3, 2015
Grant date	Nov 3, 2015

Abstract

A rotor includes a laminated core, a plurality of magnets, and a resin portion. The laminated core includes a plurality of outer core portions arranged in a circumferential direction. The plurality of outer core portions and the plurality of magnets are alternately arranged in the circumferential direction. In addition, the outer core portion includes a through-hole that penetrates in an axial direction. The resin portion includes a columnar portion that is disposed inside the through-hole. Accordingly, the rigidity of the resin portion is enhanced. In addition, the resin portion includes a gate mark portion. At least a portion of the gate mark portion is positioned farther radially inward than the through-hole.

First claim

What is claimed is:

1. A rotor comprising:
a plurality of magnets which are arranged in a circumferential direction around a center axis that extends in a vertical direction;
a laminated core in which a plurality of thin plate cores are laminated in an axial direction; and
an injection molded resin portion; wherein
the laminated core includes an inner core portion which axially extends in a cylindrical shape in a region located farther radially inward than the plurality of m…

Assignees

• Nidec Corp

Inventors

• Asahi Kyohei
• Hamagishi Kenichiro
• Tanaka Kuniaki
• Terada Susumu

Classifications

• H02K15/12

  Electricity · mapped topic

• H02K1/04

  Electricity · mapped topic

• H02K15/03

  Electricity · mapped topic

• H02K1/2773 Primary

  Electricity · mapped topic

• H02K1/276 Primary

  Electricity · mapped topic