Core manufacturing device

Patent metadata

Field	Value
Publication number	US-9812239-B2
Application number	US-201514596752-A
Country	US
Kind code	B2
Filing date	Jan 14, 2015
Priority date	Jan 21, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A manufacturing device for a rotor core includes: a magnetization device that magnetizes magnet raw materials before being magnetized disposed in magnet insertion holes of the rotor core to turn the magnet raw materials before being magnetized into permanent magnets; and a detachment device that detaches the rotor core from the magnetization device. The detachment device also functions as a mounting device that mounts a jig around the rotor core when the rotor core is detached from the magnetization device.

First claim

What is claimed is:

1. A manufacturing device for a core, comprising:
a magnetization device that magnetizes magnet raw materials before being magnetized provided in the core to turn the magnet raw materials before being magnetized into permanent magnets;
a detachment device that detaches the core from the magnetization device; and
a mounting device that mounts a jig composed of a magnetic body or an electromagnet to the core, wherein
the jig is being mounted around the detached core when the core is detached from the magnetization device by the detachment device;
the jig is composed of a soft magnetic body;
the mounting device is configured to mount the jig to the core before the magnet raw materials are magnetized;
the detachment device is configured to detach the core together with the jig from the magnetization device;
the core is formed in a cylindrical shape, and has different magnetic poles provided in an outer peripheral portion by the permanent magnets and arranged alternately at equiangular intervals along a circumferential direction;
the jig has magnetic barriers arranged at the equiangular intervals in the circumferential direction;
the mounting device mounts the jig to the core such that the magnetic barriers are disposed at positions corresponding to boundary lines between different magnetic poles of the core that are adjacent in the circumferential direction; and
the detachment device is configured to detach the core together with the jig from the magnetization device after removing the magnetic barriers from the positions corresponding to the boundary lines between the magnetic poles.

2. The manufacturing device for a core according to claim 1 , wherein
the mounting device is configured to mount the jig to the core detached from the magnetization device by the detachment device.

3. The manufacturing device for a core according to claim 1 , wherein
the detachment device is configured to remove the magnetic barriers from the positions corresponding to the boundary lines between the magnetic poles by rotating the jig relative to the core to offset positions of the magnetic barriers from the positions corresponding to the boundary lines between the magnetic poles.

4. The manufacturing device for a core according to claim 3 , wherein
the detachment device is configured to offset the positions of the magnetic barriers to centers of the magnetic poles when rotating the jig relative to the core to offset the positions of the magnetic barriers from the positions corresponding to the boundary lines between the magnetic poles.

5. The manufacturing device for a core according to claim 1 , wherein
the jig is composed of a cylindrical member having an inside diameter that is larger than an outside diameter of the core, and has void portions extending in an axial direction and formed at the equiangular intervals; and
the magnetic barriers are composed of the void portions or a non-magnetic body inserted into the void portions.

6. The manufacturing device for a core according to claim 1 , wherein
the jig is composed of
a first jig composed of a cylindrical member having an inside diameter that is larger than an outside diameter of the core, and having void portions that open in an end surface in an axial direction as the magnetic barriers, and
a second jig composed of a soft magnetic body and inserted into the void portions from opening portions of the void portions formed in the end surface of the first jig in the axial direction; and

the detachment device is configured to remove the magnetic barriers from the positions corresponding to the boundary lines between the magnetic poles by blocking the void portions of the first jig with the second jig.

Assignees

• Jtekt Corp

Inventors

• Nimura Keita
• Kanda Naotake
• Yamaguchi Ryosuke

Classifications

• Y10T29/53143

  Motor or generator · CPC title

• H02K15/03 Primary

  having permanent magnets · CPC title

• H01F13/003 Primary

  Methods and devices for magnetising permanent magnets (permanent magnets H01F7/02) · CPC title

• Y10T29/49012

  Rotor · CPC title