Stator assembly method and stator assembly apparatus

Patent metadata

Field	Value
Publication number	US-10284060-B2
Application number	US-201515300002-A
Country	US
Kind code	B2
Filing date	Jun 5, 2015
Priority date	Jun 5, 2014
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A stator assembly method and stator assembly apparatus in which coils that have slot housed portions and coil ends formed from a conductor are mounted to an annular stator core that includes slots formed between adjacent teeth that extend from a back yoke toward an inner side in a radial direction.

First claim

The invention claimed is:

1. A stator assembly method in which coils that have slot housed portions and coil ends formed from a conductor are mounted to an annular stator core that includes slots formed between adjacent teeth that extend from a back yoke toward an inner side in a radial direction, comprising:
forming a coil assembly in which a plurality of the coils are disposed in an annular arrangement; and
inserting the slot housed portions of the plurality of the coils, which form the coil assembly disposed in a radially inner space of the stator core, into the slots of the stator core by pushing out the plurality of the coils which form the coil assembly from a radially inner side toward a radially outer side while guide jigs are guiding the coils such that a separation interval between the coils and edge portions of the teeth that extend in the radial direction is kept in a course of the slot housed portions moving in the slots when inserting the coils into the slots of the stator core, wherein:
a width of the guide jigs in a circumferential direction gradually becomes smaller from the radially outer side toward the radially inner side as seen in a rotational axis direction, and the guide jigs are disposed so as to overlap the teeth when viewing the rotational axis direction; and
the inserting the slot housed portions into the slots includes inserting the slot housed portions into the slots while the guide jigs are guiding the coils with the guide jigs disposed so as to overlap the teeth when viewing the rotational axis direction.

2. The stator assembly method according to claim 1 , wherein
a width of the guide jigs in the circumferential direction at each position in the radial direction is equal to or more than a width of the teeth in the circumferential direction at the same position in the radial direction as seen in the rotational axis direction.

3. The stator assembly method according to claim 2 , wherein:
the guide jigs are formed to extend from end portions of the teeth on the radially inner side to the radially inner space of the stator core, which is on the radially inner side with respect to the end portions of the teeth on the radially inner side, as seen in the rotational axis direction; and
the inserting the slot housed portions into the slots includes inserting the slot housed portions into the slots by pushing out the coils from the radially inner side toward the radially outer side while the guide jigs are guiding the coils from the radially inner space of the stator core.

4. The stator assembly method according to claim 3 , wherein
portions of the guide jigs that contact the coils have been chamfered into a round shape.

5. The stator assembly method according to claim 2 , wherein
portions of the guide jigs that contact the coils have been chamfered into a round shape.

6. The stator assembly method according to claim 2 , wherein
cut portions in a stepped shape are provided on sides of the guide jigs in the circumferential direction, the cut portions being cut into a shape corresponding to a shape of the slots as seen in the rotational axis direction with the guide jigs disposed so as to overlap the teeth.

7. The stator assembly method according to claim 1 , wherein:
the guide jigs are formed to extend from end portions of the teeth on the radially inner side to the radially inner space of the stator core, which is on the radially inner side with respect to the end portions of the teeth on the radially inner side, as seen in the rotational axis direction; and
the inserting the slot housed portions into the slots includes inserting the slot housed portions into the slots by pushing out the coils from the radially inner side toward the radially outer side while the guide jigs are guiding the coils from the radially inner space of the stator core.

8. The stator assembly method according to claim 7 , wherein
portions of the guide jigs that contact the coils have been chamfered into a round shape.

9. The stator assembly method according to claim 7 , wherein
cut portions in a stepped shape are provided on sides of the guide jigs in the circumferential direction, the cut portions being cut into a shape corresponding to a shape of the slots as seen in the rotational axis direction with the guide jigs disposed so as to overlap the teeth.

10. The stator assembly method according to claim 1 , wherein
portions of the guide jigs that contact the coils have been chamfered into a round shape.

11. The stator assembly method according to claim 10 , wherein
cut portions in a stepped shape are provided on sides of the guide jigs in the circumferential direction, the cut portions being cut into a shape corresponding to a shape of the slots as seen in the rotational axis direction with the guide jigs disposed so as to overlap the teeth.

12. The stator assembly method according to claim 1 , wherein
cut portions in a stepped shape are provided on sides of the guide jigs in the circumferential direction, the cut portions being cut into a shape corresponding to a shape of the slots as seen in the rotational axis direction with the guide jigs disposed so as to overlap the teeth.

13. The stator assembly method according to claim 1 , wherein:
slot housed portion guide jigs are further provided, a width of the slot housed portion guide jigs in the circumferential direction gradually becoming smaller from the radially outer side toward the radially inner side as seen in the rotational axis direction, and the slot housed portion guide jigs being disposed in the radially inner space of the stator core on the radially inner side of the teeth; and
the inserting the slot housed portions into the slots includes inserting the slot housed portions into the slots by pushing out the coils from the radially inner side toward the radially outer side while the slot housed portion guide jigs are guiding the coils with the slot housed portion guide jigs disposed in the radially inner space of the stator core on the radially inner side of the teeth.

14. The stator assembly method according to claim 13 , wherein
a width, in the circumferential direction, of end portions of the slot housed portion guide jigs on the radially outer side is equal to or more than a width, in the circumferential direction, of end portions of the teeth on the radially inner side as seen in the rotational axis direction.

15. The stator assembly method according to claim 13 , wherein
the inserting the slot housed portions into the slots includes inserting the slot housed portions into the slots by pushing out the coils from the radially inner side toward the radially outer side while the guide jigs and the slot housed portion guide jigs are guiding the coils with portions of the guide jigs formed to extend to the radially inner space of the stator core and the slot housed portion guide jigs overlapping each other as seen in the rotational axis direction.

16. The stator assembly method according to claim 1 , further comprising:
inserting the guide jigs into the coils which form the coil assembly after the forming the coil assembly.

17. The stator assembly method according to claim 16 , wherein
the inserting the guide jigs into the coils is inserting the guide jigs into the coils from the radially outer side toward the radially inner side of the coil assembly.

18. The stator assembly method according to claim 1 , wherein
the forming the coil assembly includes inserting the guide jigs into the coils in a middle of disposing the plurality of the coils in an annular arrangeme

Assignees

• Aisin Aw Co

Inventors

• Hashimoto Shingo
• Sato Shingo
• Maeda Shigeru
• Tomura Masumi

Classifications

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title

• H02K15/06 Primary

  Embedding prefabricated windings in the machines · CPC title

• H02K15/085

  by laying conductors into slotted stators · CPC title

• H02K15/026 Primary

  Wound cores · CPC title

• H02K15/066 Primary

  inserted perpendicularly to the axis of the slots or inter-polar channels · CPC title