Motor case with integrated wire sealing structure

Patent metadata

Field	Value
Publication number	US-2016190892-A1
Application number	US-201514960156-A
Country	US
Kind code	A1
Filing date	Dec 4, 2015
Priority date	Dec 5, 2014
Publication date	Jun 30, 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 motor comprising:
a rotor rotatable about an axis; a stator; a housing defining a motor chamber that at least substantially houses the rotor and the stator, said housing including an end plate comprising a unitary, integrally formed end plate body, a cable extending from the motor chamber to a cable interface disposed externally relative to the motor chamber; and a cable connection assembly including—
a cable receiver defining a cable opening, with the cable extending generally axially through the cable opening,
a compressible grommet at least substantially circumscribing the cable and being at least in part received in the cable opening, and
a nut at least substantially circumscribing the grommet and the cable,
said nut being threadably secured to the cable receiver,
said cable connection assembly forming a seal about said cable, such that ingress of contaminants into the motor chamber is at least substantially prohibited,
said cable receiver being integrally formed with the end plate body.

2 . The motor as claimed in claim 1 ,
said end plate body being a cast body.

3 . The motor as claimed in claim 1 ,
said grommet being an axially tapered grommet presenting a broader grommet end and a narrower grommet end.

4 . The motor as claimed in claim 3 ,
said narrower grommet end being oriented toward the motor chamber.

5 . The motor as claimed in claim 4 ,
said cable receiver presenting an axially tapered inner face, said inner face presenting a broader face end and a narrower face end. said narrower face end being oriented toward the motor chamber.

6 . The motor as claimed in claim 1 ,
said cable receiver presenting an axially tapered inner face, said inner face presenting a broader face end and a narrower face end.

7 . The motor as claimed in claim 6 ,
said narrower face end being oriented toward the motor chamber.

8 . The motor as claimed in claim 1 ,
said grommet being formed of resiliently deformable material.

9 . The motor as claimed in claim 8 ,
said material comprising nitrile.

10 . The motor as claimed in claim 8 ,
said material comprising a fluoroelastomer.

11 . The motor as claimed in claim 1 ,
said cable receiver defining a plurality of external threads, said nut defining a plurality of internal threads configured to engage the external threads.

12 . The motor as claimed in claim 1 ,
said cable connection assembly further including a sleeve at least substantially circumscribing the cable, said grommet at least substantially circumscribing the sleeve.

13 . The motor as claimed in claim 1 ,
said nut presenting a grommet-engaging face, said grommet presenting a nut-engaging face, said grommet configured to shift axially into the cable opening upon corresponding axial shifting of the nut and engagement of said nut-engaging face and said grommet-engaging face.

14 . The motor as claimed in claim 13 ,
said grommet configured to be compressibly deformed upon engagement of the grommet-engaging face by the nut-engaging face and subsequent axial shifting of the grommet into the cable opening.

15 . The motor as claimed in claim 1 ,
said end plate body at least in part defining an electronics compartment.

16 . The motor as claimed in claim 15 ,
said end plate body defining an access opening to said electronics compartment.

17 . The motor as claimed in claim 16 ,
said end plate including an access cover at least in part covering said access opening.

18 . The motor as claimed in claim 16 , further including:
an encoder at least in part disposed in the electronics compartment, said access opening being disposed adjacent the encoder to enable access thereto.

19 . The motor as claimed in claim 1 ,
said cable connection assembly including a pair of said cable receivers, a pair of said grommets corresponding to said cable receivers, and a pair of said nuts corresponding to said grommets.

20 . The motor as claimed in claim 1 ,
said grommet being an axially tapered grommet presenting a broader grommet end and a narrower grommet end, said narrower grommet end being oriented toward the motor chamber, said cable receiver presenting an axially tapered inner face, said inner face presenting a broader face end and a narrower face end. said narrower face end being oriented toward the motor chamber, said cable connection assembly further including a sleeve at least substantially circumscribing the cable, said grommet at least substantially circumscribing the sleeve, said nut presenting a grommet-engaging face, said grommet presenting a nut-engaging face, said grommet configured to shift axially into the cable opening and be compressibly deformed upon corresponding axial shifting of the nut and engagement of said nut-engaging face and said grommet-engaging face.

Assignees

• Nidec Motor Corp

Inventors

• Johnson Philip S
• Hilton Daniel E

Classifications

• H02K5/18

  with ribs or fins for improving heat transfer · CPC title

• H02K5/10

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

• F16H57/0457

  Splash lubrication · CPC title

• F16H57/12

  Arrangements for adjusting or for taking-up backlash not provided for elsewhere · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title