Coil forming device and coil of a rotating electric device

Patent metadata

Field	Value
Publication number	US-10840784-B2
Application number	US-201515538873-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 26, 2014
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

An object of the invention is to increase productivity of a coil.
A coil forming device according to the present invention includes: a first bending unit 200 A that performs a compression bending process with respect to a linear conductor; and a second bending unit 200 B that performs a draw bending process with respect to the linear conductor, wherein the first bending unit 200 A and the second bending unit 200 B are integrated in one device, and wherein the first bending unit 200 A and the second bending unit 200 B are switched to access one linear conductor so as to perform the compression bending process and the draw bending process onto the one linear conductor.

First claim

The invention claimed is:

1. A coil forming device, comprising:
a first bending device configured to perform a compression bending process with respect to a linear conductor and to rotate about a first rotation center axis; and
a second bending device configured to perform a draw bending process with respect to the linear conductor and rotate about a second rotation center axis parallel to the first rotation center axis,
wherein the second bending device includes a core metal, a clamp, a back pad, and a core metal holder, the core metal holder configured to support the core metal and comprising a notch surface provided in the core metal holder along the second rotation center axis disposed at a center of the core metal,
wherein the second bending device performs the draw bending process on the linear conductor by abutting the linear conductor on the notch surface such that the linear conductor is interposed by the core metal and the clamp, the back pad is attached to the linear conductor from a side where the clamp is attached, and the core metal and the clamp are integrally rotated,
wherein the first bending device and the second bending device are integrally formed in a same device, and
wherein the first bending device and the second bending device rotate separately in a first direction to access the linear conductor so as to perform the compression bending process and the draw bending process on the linear conductor, then rotate in a second direction opposite to the first direction to retract from the linear conductor.

2. The coil forming device according to claim 1 ,
wherein the back pad of the second bending device is configured to be slidable along the linear conductor.

3. The coil forming device according to claim 2 ,
wherein the second bending device is located on a downstream side in a conveyance direction of the linear conductor with respect to the first bending unit.

4. The coil forming device according to claim 3 ,
wherein the core metal of the second bending device includes a cylindrical surface having a first diameter, a cylinder surface having a second diameter smaller than the first diameter, and two tangent planes that abut on the cylindrical surface having the first diameter and the cylindrical surface having the second diameter,
wherein a center of the cylindrical surface having the first diameter is matched with the second rotation center axis, and
wherein a center of the cylindrical surface having the second diameter is at a position decentered from the center of the cylindrical surface having the first diameter.

5. The coil forming device according to claim 1 ,
wherein the first bending device comprises a core metal and at least one bending pin, the core metal configured to rotate about the first rotation center axis disposed at a center of the core metal, and
wherein the core metal is formed with at least one groove.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Genmoto Takashi
• Higuchi Teruaki
• Nakayama Kenichi
• TAKAHOSHI Hiroyuki
• Fukuda Tomohiro

Classifications

• H02K15/043 Primary

  winding flat conductive wires or sheets · CPC title

• H02G1/1285 Primary

  by friction, e.g. abrading, grinding, brushing · CPC title

• H02K15/0421

  and consisting of single conductors, e.g. hairpins · CPC title

• B21F3/04

  externally on a mandrel or the like · CPC title

• H02K3/12

  arranged in slots · CPC title