Armature of Rotating Electric Machine and Method of Manufacturing the same

• US 20090115281A1
• Filed: 06/05/2006
• Published: 05/07/2009
• Est. Priority Date: 06/07/2005
• Status: Active Grant

• Current Assignee: Mitsuba Corporation
• Original Assignee: Mitsuba Corporation
• Inventors: Kimura, Masaaki, Yamazaki, Yoichi, Terada, Toshikazu, Yokoo, Tsugio, Hosoi, Keiichi
• Granted Patent: US 7,821,174 B2
• Time in Patent Office: Days
• US Class Current: 310/216.53
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 1/28 Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• CPC Class Codes: H02K 15/02 of stator or rotor bodies
• CPC Class Codes: H02K 15/028 for fastening to casing or support, respectively to shaft or hub
• CPC Class Codes: H02K 7/04 Balancing means
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine
• CPC Class Codes: Y10T 29/49012 Rotor

Abstract

A rotating electric machine includes a shaft and an armature with a core that includes a shaft hole. The core includes a plurality of core materials that are laminated. When pressing in and fixing the shaft to the shaft hole, the shaft hole is applied with an ironing process in advance in order to rectify a cylindrical hole shape of the shaft hole.

Claims

1. A rotating electric machines comprising:

a shaft; and

an armature with a core that includes a shaft hole, wherein;

the core includes a plurality of core materials that are laminated, and

when pressing in and fixing the shaft to the shaft hole, the shaft hole is applied with an ironing process in advance in order to rectify a cylindrical hole shape of the shaft hole.

2. The rotating electric machine according to claim 1, wherein a part of the shaft, whose outer circumferential surface is fitted with the shaft hole, is formed in a perfect circular shape.

3. The armature rotating electric machine according to claim 1, wherein the core includes a space passing therethrough in an axial direction at an inner radial-side part of the core that defines the shaft hole with the space located at an inner radial side further than a location where the core materials are integrated.

4. The armature for a rotating electric machine according to claim 1, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.

6. The rotating electric machine according to claim 2, wherein the core includes a space passing therethrough in an axial direction at an inner radial-side part of the core that defines the shaft hole with the space located at an inner radial side further than a location where the core materials are integrated.

7. The rotating electric machine according to claim 2, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.

8. The rotating electric machine according to claim 3, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.

9. The rotating electric machine according to claim 6, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.

5. A manufacturing method of an armature, comprising:

forming a core that includes a shaft hole by laminating plurality of core materials; and

applying an ironing process to the shaft hole in order to rectify a cylindrical hole shape of the shaft hole.

10. A manufacturing method of a rotating electric machine, comprising:

forming the armature according to claim 5; and

pressing in an fixing a shaft to the shaft hole after forming the armature.

11. The method according to claim 10, wherein a part of the shaft, whose outer circumferential surface is fitted with the shaft hole, is formed in a perfect circular shape.

12. The method according to claim 5, wherein the core includes a space passing therethrough in an axial direction at an inner radial-side part of the core that defines the shaft hole with the space located at an inner radial side further than a location where the core materials are integrated.

13. The method according to claim 5, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.

14. The method according to claim 11, wherein the core includes a space passing therethrough in an axial direction at an inner radial-side part of the core that defines the shaft hole with the space located at an inner radial side further than a location where the core materials are integrated.

15. The method according to claim 11, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.

16. The method according to claim 12, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.

17. The method according to claim 14, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.

18. An armature, comprising:

a core that includes a shaft hole, wherein;

the core includes a plurality of core materials that are laminated, and

the shaft hole is applied with an ironing process in order to rectify a cylindrical hole shape of the shaft hole.

19. The armature according to claim 18, wherein the core includes a space passing therethrough in an axial direction at an inner radial-side part of the core that defines the shaft hole with the space located at an inner radial side further than a location where the core materials are integrated.

20. The armature according to claim 18, wherein the core materials are formed by a punching process of metallic plate materials, and the ironing process is performed in a same direction as a punching direction of the punching process.