Vehicle differential assembly

Patent metadata

Field	Value
Publication number	US-9649931-B2
Application number	US-201514735364-A
Country	US
Kind code	B2
Filing date	Jun 10, 2015
Priority date	Jun 10, 2015
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A vehicle differential assembly is provided. The differential assembly including a differential case rotationally coupled to a differential housing. A differential gear set is rotationally coupled to the differential case. A ring gear rotationally coupled to the differential case. A disconnect member operably coupled between the ring gear and the differential case. The disconnect member having a torque transmitting member movable between a coupled and an uncoupled position, wherein the ring gear is rotationally coupled to the differential case when the torque transmitting member is in the coupled position.

First claim

What is claimed is:

1. A vehicle differential assembly comprising:
a differential housing;
a differential case rotationally coupled to and disposed within the differential housing, the differential case having a first spline portion;
a differential gear set rotationally coupled to and disposed within the differential case;
a ring gear rotationally coupled to and disposed about the differential case, the ring gear having a second spline portion; and
a disconnect member operably coupled between the ring gear and the differential case, the disconnect member having a torque transmitting member movable between a coupled and an uncoupled position, the disconnected member being in the coupled position when the torque transmitting member is coupled to the first spline portion and the second spline portion, wherein the ring gear is rotationally coupled to the differential case when the torque transmitting member is in the coupled position.

2. The vehicle differential assembly of claim 1 wherein the disconnect member further includes an actuator operably coupled to move the torque transmitting member between the coupled position and uncoupled position.

3. The vehicle differential assembly of claim 1 wherein the torque transmitting member includes an annular lock ring operably coupled to the ring gear and the differential case, the lock ring being movable between the coupled position and the uncoupled position, the lock ring being configured to transmit torque between the ring gear and the differential case when in the coupled position.

4. The vehicle differential assembly of claim 3 wherein:
the ring gear includes a first spline portion;
the differential case having a second spline portion; and
the lock ring includes a third spline portion sized and shaped to couple with the first spline portion and second spline portion when in the coupled position; and
the annular lock ring is disposed about the differential case and a portion of the ring gear.

5. A method of selectively transmitting torque with a vehicle differential assembly, the method comprising:
providing a differential housing;
rotationally coupling a differential case to the differential housing, the differential case having a first spline portion, the differential case being disposed within the differential housing;
rotationally coupling a differential gear set to the differential case, the differential gear set being disposed within the differential case;
rotationally coupling a ring gear to the differential case, the ring gear being disposed about the differential case and having a second spline portion;
moving a disconnect member between a coupled position and an uncoupled position, the disconnect member being coupled to the first spline portion and second spline portion when in the coupled position;
transmitting torque from the ring gear to the differential case when in the coupled position; and
rotating the ring gear independently from the differential case to stop the transmission of torque from the ring gear to the differential case when in the uncoupled position.

6. The method of claim 5 further comprising activating an actuator to move the disconnect member between the coupled position and the uncoupled position.

7. The method of claim 6 wherein the step of moving the disconnect member includes moving a lock ring, the lock ring being coupled to one of the first spline portion and second spline portion when in the uncoupled position and coupled to both the first spline portion and second spline portion when in the coupled position.

8. The method of claim 7 wherein the step of moving the lock ring includes engaging one of the first spline and second spline with a third spline on the lock ring prior to transmitting torque from the ring gear to the differential case.

9. A vehicle comprising:
an engine configured to transmit torque;
a differential housing having a pinion, the pinion being operably coupled to receive torque from the engine;
a differential case rotationally coupled to and disposed within the differential housing, the differential case having a first spline portion;
a differential gear set rotationally coupled to the differential case, the differential gear set being disposed within the differential case;
a ring gear disposed within the differential housing and rotationally coupled to and disposed about the differential case, the ring gear having a second spline portion, the ring gear being operably coupled to the pinion;
an annular disconnect member operably coupled between the ring gear and the differential case, the disconnect member being disposed about at least a portion of the differential case and at least a portion of the ring gear, the disconnect member having a torque transmitting member movable between a coupled and an uncoupled position, the disconnected member being in the coupled position when the torque transmitting member is coupled to the first spline portion and the second spline portion, wherein the ring gear is rotationally coupled to the differential case when the torque transmitting member is in the coupled position; and
at least one axle coupled to receive torque from the differential gear set when the disconnect member is in the coupled position.

10. The vehicle of claim 9 wherein the disconnect member further includes an actuator operably coupled to move the torque transmitting member between the coupled position and uncoupled position.

11. The vehicle of claim 9 wherein the torque transmitting member includes an annular lock ring operably coupled to the first spline portion and the second spline portion, the lock ring being movable between the coupled position and the uncoupled position, the lock ring being configured to transmit torque between the ring gear and the differential case when in the coupled position.

12. The vehicle of claim 11 wherein:
the ring gear includes a first spline portion;
the differential case having a second spline portion; and
the lock ring having a third spline portion sized and shaped to couple with the first spline portion and second spline portion.

Assignees

• Gm Global Tech Operations Llc
• Gm Global Tech Operations Llc

Inventors

• Zhao Shaun X

Classifications

• F16H48/08 Primary

  comprising bevel gears · CPC title

• F16H48/24

  using positive clutches or brakes · CPC title

• F16H48/30

  using externally-actuatable means · CPC title

• B60K17/3462 Primary

  with means for changing distribution of torque between front and rear wheels · CPC title

• F16H48/20

  Arrangements for suppressing or influencing the differential action, e.g. locking devices · CPC title