Stator winding thermal protector support

Patent metadata

Field	Value
Publication number	US-2016164384-A1
Application number	US-201514960149-A
Country	US
Kind code	A1
Filing date	Dec 4, 2015
Priority date	Dec 5, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

Electric motors are disclosed. The motors are preferably for use in an automated vehicle, although any one or more of a variety of motor uses are suitable. The motors include lift, turntable, and locomotion motors.

First claim

What is claimed is:

1 . A stator for use in an electric motor, said stator comprising:
a core; an electrically insulative covering at least in part overlying the core; wiring wound about the core and the covering; and a thermal protector assembly including a thermal protector and a bracket supporting the thermal protector, said bracket being coupled to the covering so as to position the protector at least substantially adjacent the wiring.

2 . The stator as claimed in claim 1 ,
said bracket positioning the protector in contact with the wiring.

3 . The stator as claimed in claim 1 ,
said wiring forming a plurality of coils, said bracket positioning the thermal protector at least substantially between adjacent ones of said coils.

4 . The stator as claimed in claim 3 ,
said stator including a plurality of said thermal protector assemblies, each of said brackets positioning a corresponding one of the thermal protectors at least substantially between corresponding adjacent ones of said coils.

5 . The stator as claimed in claim 4 ,
said plurality of coils including A-phase, B-phase, and C-phase coils, a first one of said brackets positioning a first one of said thermal protectors at least substantially between an A-phase coil and an adjacent B-phase coil, a second one of said brackets positioning a second one of said thermal protectors at least substantially between a B-phase coil and an adjacent C-phase coil.

6 . The stator as claimed in claim 1 ,
said stator including a plurality of said thermal protector assemblies, said thermal protectors being connected in series.

7 . The stator as claimed in claim 1 ,
said covering including a post, said bracket defining a post-receiving opening, said post extending through the post-receiving opening to couple the bracket and the covering,

8 . The stator as claimed in claim 7 ,
said core defining an axis, said post extending generally axially and restricting relative radial and circumferential movement between the bracket and the covering.

9 . The stator as claimed in claim 8 ,
said covering including a generally axially extending pillar, said post extending from said pillar, with the pillar defining a shoulder adjacent the post, said shoulder supporting the bracket and restricting axial movement between the bracket and the covering.

10 . The stator as claimed in claim 7 ,
said bracket including a resiliently deflectable latch, said latch including a catch, said covering defining a latch-receiving recess that receives the catch.

11 . The stator as claimed in claim 7 ,
said post including an endmost portion, said endmost portion being heat-staked to the covering.

12 . The stator as claimed in claim 7 ,
said core defining an axis, said bracket including a mounting portion comprising a generally radially extending mounting plate, said mounting plate defining the post-receiving opening.

13 . The stator as claimed in claim 7 ,
said covering including a plurality of said posts, said bracket defining a plurality of said post-receiving openings, said posts extending through corresponding ones of the post-receiving openings to couple the bracket and the covering.

14 . The stator as claimed in claim 1 ,
said covering comprising a discrete end cap secured relative to the core.

15 . The stator as claimed in claim 14 ,
said covering comprising a plurality of said discrete end caps.

16 . The stator as claimed in claim 15 ,
said core defining an axis, said core including a plurality of generally radially extending teeth, each of said discrete end caps fitted over at least a part of a corresponding one of said teeth.

17 . The stator as claimed in claim 1 ,
said bracket including a case, said case including a base and a pair of side walls extending from the base, said base and said side walls cooperatively at least in part surrounding the thermal protector.

18 . The stator as claimed in claim 17 ,
said case including a resiliently deflectable spring arm yieldably engaging the protector so as to restrict shifting of the thermal protector.

19 . The stator as claimed in 17 ,
said case including a pair of side hooks extending from the base between the side walls, said side hooks engaging the thermal protector.

20 . The stator as claimed in claim 17 ,
said thermal protector including a sleeve, said case engaging the sleeve.

Assignees

• Nidec Motor Corp

Inventors

• Johnson Philip S
• Michaels Paul G

Classifications

• F16H1/08

  the members having helical, herringbone, or like teeth · CPC title

• H02K5/10

  with arrangements for protection from ingress, e.g. water or fingers · CPC title

• B60B27/0026

  of the radial type, e.g. splined key · CPC title

• F16H57/021

  Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings · CPC title

• F16H2057/127

  using springs · CPC title