Method and apparatus for manufacturing stator of rotary electric machine

• US 6,694,598 B2
• Filed: 08/29/2002
• Issued: 02/24/2004
• Est. Priority Date: 01/12/2000
• Status: Expired due to Term

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Takahashi, Makoto, Kamakura, Youichi, Sugiyama, Masaru
• Primary Examiner(s): Vidovich, Gregory
• Assistant Examiner(s): Kenny, Stephen
• Application Number:
  US10/230,168
• Publication Number:
  US 20030005579A1
• Time in Patent Office: 544 Days
• Field of Search: 295/96, 295/98, 296/05, 296/06, 242/432, 310/132, 310/179, 310/180
• US Class Current: 29/596
• CPC Class Codes: H02K 15/0428 characterised by the method or apparatus for simultaneously twisting a plurality of hairpins for simultaneously twisting a plurality of hairpins open ends after insertion into the machine H02K15/0087
• CPC Class Codes: H02K 15/064 Windings consisting of separate segments, e.g. hairpin windings H02K15/063 takes precedence
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine
• CPC Class Codes: Y10T 29/53143 Motor or generator

Abstract

A method for manufacturing a stator of a rotary electric machine includes: a step of forming a plurality of conductor segments each having at least a straight leg; a step of inserting the plurality of conductor segments into each of the slots in a plurality of radially aligned layers so that the straight legs can extend outside an end of the stator core; a step of stratifying the straight legs in radially aligned layers to correspond to the layers in the slots; a step of holding each of the stratified portions at grip portions; a step of circumferentially shifting each of the grip portions in a prescribed circumferential direction of the stator core; and a step of axially shifting each of the grip portions separately from another in an axial direction of the stator core to locate those of the grip portions to be connected adjacent to each other.

Claims

1. An apparatus for manufacturing a stator of a rotary electric machine including a cylindrical stator core with a plurality of slots and a plurality of conductor segments respectively disposed in said slots in a plurality of radially aligned layers, said apparatus comprising:

means for holding each of said conductor segments at grip portions;

second means for driving said first means to shift said grip portions in a prescribed circumferential direction of said stator core; and

third means for driving said first means to shift said grip portions separately from one another in an axial direction of said stator core to locate those of said grip portions to be connected adjacent to each other.

2. The apparatus as claimed in claim 1, wherein

said first means comprises a plurality of twisting tools which respectively shift said grip portions separately from one another in circumferential and axial directions of said stator core.

3. The apparatus as claimed in claim 1, wherein

said second means comprises a plurality of twisting tools for respectively shifting said grip portions the same angle in said circumferential direction, and

said third means comprises a plurality of axial drive units for respectively shifting said grip portions in said axial direction under all heights of said grip portions become equal.

4. An apparatus for manufacturing a stator of a rotary electric machine including a cylindrical stator core with a plurality of slots and a plurality of conductor segments respectively disposed in said slots in a plurality of radially aligned layers, said apparatus comprising:

a plurality of twisting tools for respectively shifting said grip portions separately from one another in circumferential and axial directions of said stator core;

a plurality of circumferential drive units for respectively driving said twisting tools in a circumferential direction;

a plurality of axial drive units for respectively driving said twisting tools in an axial direction of said stator core to locate those of said grip portions to be connected adjacent to each other.

5. The apparatus as claimed in claim 4, wherein

each of said twisting tools has means for holding said grip portions.