Disconnect system for an all-wheel drive vehicle drive train

Patent metadata

Field	Value
Publication number	US-9718354-B2
Application number	US-201514684611-A
Country	US
Kind code	B2
Filing date	Apr 13, 2015
Priority date	Apr 17, 2014
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A disconnect system for an all-wheel drive vehicle drive train is provided. The disconnect system includes a first torque transmitter, a second torque transmitter and a clutch selectively connecting the first torque transmitter and the second torque transmitter. The clutch includes an engagement section and an inner race and an outer race supporting the engagement section. The inner race is arranged to be forced against the engagement section to lock the clutch and moved away from the engagement section to unlock the clutch.

First claim

What is claimed is:

1. A disconnect system for an all-wheel drive vehicle drive train comprising:
a first torque transmitter;
a second torque transmitter;
a clutch selectively connecting the first torque transmitter and the second torque transmitter, the clutch including an engagement section and an inner race and an outer race supporting the engagement section, the inner race arranged to be forced against the engagement section to lock the clutch and moved away from the engagement section to unlock the clutch;
an actuator for axially moving the inner race for selective connection of the first torque transmitter and the second torque transmitter via the clutch and
an elastic element for forcing the inner race against the engagement section to lock the clutch, the actuator for axially moving the inner race away from the engagement section to unlock the clutch.

2. The disconnect system as recited in claim 1 wherein the actuator includes an electromagnet.

3. The disconnect system as recited in claim 2 wherein the electromagnet is powered on to axially move the inner race away from the engagement section to unlock the clutch.

4. The disconnect system as recited in claim 2 wherein the inner race is held against the electromagnet in an unlocked state of the clutch.

5. The disconnect system as recited in claim 2 further comprising an elastic element, the inner race being held spaced away from the electromagnet by elastic element in a locked state of the clutch.

6. The disconnect system as recited in claim 1 wherein the engagement section is a wedge plate.

7. A disconnect system for an all-wheel drive vehicle drive train comprising:
a first torque transmitter;
a second torque transmitter;
a clutch selectively connecting the first torque transmitter and the second torque transmitter, the clutch including an engagement section and an inner race and an outer race supporting the engagement section, the inner race arranged to be forced against the engagement section to lock the clutch and moved away from the engagement section to unlock the clutch, wherein the inner race includes a tapered outer surface, the engagement section being radially compressed by the tapered outer surface when the inner race is forced against the engagement section to lock the clutch.

8. The disconnect system as recited in claim 1 wherein the first torque transmitter is an input component configured to receive torque from engine.

9. The disconnect system as recited in claim 1 wherein the second torque transmitter is a power takeoff unit-side shaft.

10. A disconnect system for an all-wheel drive vehicle drive train comprising:
a first torque transmitter;
a second torque transmitter;
a wedge clutch selectively connecting the first torque transmitter and the second torque transmitter; and
an electromagnet controllable to effect the selective connection of the first torque transmitter and the second torque transmitter via the wedge clutch, the wedge clutch including a wedge plate and an inner race and an outer race supporting the wedge plate; and
an elastic element forcing the inner race against the wedge plate to lock the wedge clutch.

11. The disconnect system as recited in claim 10 wherein the first torque transmitter is an input component of a planetary differential, the outer race being part of the planetary differential.

12. The disconnect system as recited in claim 11 wherein the outer race is formed by a differential carrier of the planetary differential.

13. The disconnect system as recited in claim 10 wherein the second torque transmitter is configured for connection to a power takeoff unit.

14. The disconnection system as recited in claim 7 further comprising an actuator for axially moving the inner race for selective connection of the first torque transmitter and the second torque transmitter via the clutch.

15. The disconnection system as recited in claim 14 wherein the actuator includes an electromagnet.

16. The disconnection system as recited in claim 15 wherein the electromagnet is powered on to axially move the inner race away from the engagement section to unlock the clutch.

17. The disconnection system as recited in claim 16 wherein the inner race is held spaced away from the electromagnet by an elastic element in a locked state of the clutch.

18. The disconnection system as recited in claim 7 wherein the engagement section is a wedge plate.

19. The disconnection system as recited in claim 7 wherein the first torque transmitter is an input component configured to receive torque from engine.

20. The disconnection system as recited in claim 7 wherein the second torque transmitter is a power takeoff unit-side shaft.

Assignees

• Schaeffler Technologies Ag

Inventors

• Lee Brian
• Ohr Carsten
• Hemphill Jeffrey

Classifications

• F16D27/11

  with conical friction surfaces, e.g. cone clutches · CPC title

• F16H48/11

  having intermeshing planet gears · CPC title

• B60K23/08 Primary

  for changing number of driven wheels {, for switching from driving one axle to driving two or more axles (B60K17/3515 takes precedence)} · CPC title

• F16H2048/106

  characterised by two sun gears · CPC title

• B60K2023/0833

  for adding torque to the rear wheels · CPC title