Coil end bending jig

Patent metadata

Field	Value
Publication number	US-10361611-B2
Application number	US-201615298343-A
Country	US
Kind code	B2
Filing date	Oct 20, 2016
Priority date	Oct 22, 2015
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A coil end bending jig pushes down a plurality of coil ends of coil segments held by a toric stator core, the plurality of coil ends being arranged on a same circumference. The coil end bending jig includes a plurality of bending units each having a bending tooth that makes contact with a corresponding one of the coil ends, and a guide member having a plurality of guiding slits into which the plurality of bending units is inserted, respectively. The plurality of guiding slits extends from an inner peripheral side of the stator core to an outer peripheral side of the stator core so as not to intersect with each other when viewed from an axial direction of the stator core.

First claim

What is claimed is:

1. A coil end bending jig comprising:
a plurality of bending units each having a bending tooth making contact with a corresponding one of a plurality of coil ends of a plurality of coil segments held by a toric stator core, the plurality of coil ends being arranged on a first circumference; and
a guide member having a plurality of guiding slits into which the plurality of bending units is inserted, respectively, the plurality of guiding slits extending from an inner peripheral side of the stator core to an outer peripheral side of the stator core so as not to intersect with each other when viewed from an axial direction of the stator core.

2. The coil end bending jig according to claim 1 , wherein
the guiding slits extend linearly when viewed from the axial direction of the stator core.

3. The coil end bending jig according to claim 2 , wherein
the guiding slits extend along a tangential direction with respect to a circle on which the plurality of coil ends is arranged, when viewed from the axial direction of the stator core.

4. The coil end bending jig according to claim 1 , further comprising:
a drive plate including a plurality of driving slits arranged on a second circumference, and a through-hole provided in a center of the drive plate, the drive plate being rotatable relative to the guide member, wherein:
the bending unit includes a driving beam extending in a direction perpendicular to the bending tooth, a holding beam projecting from one end portion of the driving beam so as to hold the bending tooth, and a cam follower projecting from the other end portion of the driving beam in a direction opposite to a direction where the holding beam projects; and
the cam follower is inserted into a corresponding one of the driving slits.

5. A method for bending coil ends by use of a coil end bending jig which includes a plurality of bending units and a guide member having a plurality of guiding slits into which the plurality of bending units is inserted, respectively, the method comprising:
pushing down with the jig a plurality of coil ends of a plurality of coil segments held by a toric stator core toward an outer peripheral side of the stator core; and
pushing the plurality of coil ends toward an inner peripheral side of the stator core so that the plurality of coil ends is pushed down toward an outer peripheral side of the stator core along a circumference direction of the stator core.

6. The method according to claim 5 , further comprising:
inserting a restraint member on the inner peripheral side of the stator core relative to the plurality of coil ends in advance before pushing the plurality of coil ends toward the inner peripheral side of the stator core, so that an outer peripheral surface of the restraint member is opposed to the plurality of coil ends in a radial direction of the stator core and a central axis of the restraint member matches with a central axis of the stator core, the restraint member having a round-shaped outer peripheral portion in a section perpendicular to the axial direction of the stator core, wherein
when the plurality of coil ends is pushed toward the inner peripheral side of the stator core, the plurality of coil ends is pressed against the outer peripheral surface of the restraint member.

7. A coil end bending jig comprising:
a plurality of bending units each having a bending tooth making contact with a corresponding one of a plurality of coil ends of a plurality of coil segments held by a toric stator core, the plurality of coil ends being arranged on a same circumference; and
a guide member having a plurality of guiding slits into which the plurality of bending units is inserted, respectively, the guiding slits extending along a tangential direction with respect to a circle on which the plurality of coil ends is arranged, when viewed from an axial direction of the stator core.

Assignees

• Toyota Motor Co Ltd
• Toyota Jidosha Kabusiki Kaisha

Inventors

• Hirao Yasuyuki

Classifications

• H02K15/0031 Primary

  Electricity · mapped topic

• H02K15/0037

  Electricity · mapped topic

• H02K15/085

  by laying conductors into slotted stators · CPC title

• H02K15/0087

  Electricity · mapped topic

• H02K15/36 Primary

  Processes or apparatus for simultaneously twisting two or more open ends of hairpins after their insertion into the machine (for simultaneously twisting two or more hairpins prior to mounting into the machine H02K15/0428) · CPC title