Stator sleeve with integrated cooling for hybrid/electric drive motor

Patent metadata

Field	Value
Publication number	US-9653961-B2
Application number	US-201514641773-A
Country	US
Kind code	B2
Filing date	Mar 9, 2015
Priority date	Mar 14, 2013
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A hybrid system includes an electric motor/generator or eMachine with a stator received in a cooling sleeve. The stator is pressed into the cooling sleeve to form a press-fit connection. The press fit connection has sufficient strength to carry the complete torque generated by the eMachine, so the stator will never move relative to the sleeve through the life of the hybrid system.

First claim

What is claimed is:

1. A hybrid system, comprising:
a hybrid module including
a hybrid module housing,
an eMachine including a rotor and a stator, wherein the stator includes windings,
a clutch operatively connected to the eMachine to connect and disconnect the eMachine from an engine;
a cooling sleeve received inside the hybrid module housing, wherein the cooling sleeve and the hybrid module housing define a fluid channel through which lubricant flows for cooling the eMachine,
wherein the stator of the eMachine is press-fitted inside the cooling sleeve,
wherein the cooling sleeve has one or more tabs extending transverse to the rest of the cooling sleeve,
wherein the cooling sleeve has spray openings, and
wherein the tabs of the cooling sleeve are clamped to the hybrid module housing to position the spray openings at a position to spray the lubricant onto the windings to cool the stator; and

an automatic transmission connected to the hybrid module to transfer power from the hybrid module.

2. The hybrid system of claim 1 , further comprising:
one or more bolts securing the cooling sleeve to the hybrid module housing.

3. The hybrid system of claim 2 , further comprising:
wherein the sleeve includes one or more seal grooves; and
one or more seals received in the seal grooves for sealing the fluid channel.

4. The hybrid system of claim 3 , wherein the cooling sleeve has a stator contacting surface contacting the stator, the stator contacting surface being flat.

5. The hybrid system of claim 3 , wherein the rotor includes a permanent magnet.

6. The hybrid system of claim 5 , wherein the rotor includes a stack of magnetic plates.

7. The hybrid system of claim 6 , further comprising a transmission/hybrid control module configured to control the operation of the transmission and the hybrid module.

8. The hybrid system of claim 1 , further comprising:
wherein the sleeve includes one or more seal grooves; and
one or more seals received in the seal grooves for sealing the fluid channel.

9. The hybrid system of claim 8 , wherein the cooling sleeve has a stator contacting surface contacting the stator, wherein the stator contacting surface lacks a shoulder.

10. The hybrid system of claim 8 , wherein the rotor includes a permanent magnet.

11. The hybrid system of claim 8 , wherein the rotor includes a stack of magnetic plates.

12. The hybrid system of claim 8 , further comprising a transmission/hybrid control module configured to control the operation of the transmission and the hybrid module.

13. The hybrid system of claim 1 , wherein the cooling sleeve has a stator contacting surface contacting the stator, the stator contacting surface being flat.

14. The hybrid system of claim 13 , wherein the stator contacting surface lacks a shoulder.

15. The hybrid system of claim 13 , wherein the rotor includes a permanent magnet.

16. The hybrid system of claim 3 , wherein the rotor includes a stack of magnetic plates.

17. The hybrid system of claim 13 , further comprising a transmission/hybrid control module configured to control the operation of the transmission and the hybrid module.

18. The hybrid system of claim 1 , wherein the rotor includes a permanent magnet.

19. The hybrid system of claim 18 , wherein the rotor includes a stack of magnetic plates.

20. The hybrid system of claim 1 , further comprising a transmission/hybrid control module configured to control the operation of the transmission and the hybrid module.

Assignees

• Allison Transm Inc

Inventors

• Silva Jorge E

Classifications

• B60K2006/4825

  Electric machine connected or connectable to gearbox input shaft · CPC title

• Y10T29/49009

  Dynamoelectric machine · CPC title

• B60K6/405

  Housings · CPC title

• B60L2220/50

  Structural details of electrical machines · CPC title

• H02K1/185

  to outer stators · CPC title