# US 9,038,802 B2 · Clutch backing plate for bearing support

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- Number: US 9,038,802 B2
- Document ID: US9038802B2
- Status: Granted
- Kind: B2
- Application number: 13/561,903
- Filed: 2012-07-30
- Published: 2014-01-30
- Granted: 2015-05-26
- Earliest claimed: 2012-07-30
- Assignees: GM Global Technology Operations LLC
- Applicants: Timothy J. Reinhart; Douglas Scott Burchett; Kenneth D. Schoch; Gregory W. Kempf
- Inventors: Timothy J. Reinhart; Douglas Scott Burchett; Kenneth D. Schoch; Gregory W. Kempf
- Web page: https://patentgrep.com/patent/US9038802B2

## CPC

- F16D 13/52: Clutches with multiple lamellae {; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member (F16D13/385 takes precedence)}
- F16D 55/40: actuated by a fluid-pressure device arranged in or one the brake
- F16D 25/0638: with more than two discs, e.g. multiple lamellae
- F16D 65/186: {with full-face force-applying member, e.g. annular}
- F16D 69/00: Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces (clutching elements F16D13/60; braking members F16D65/02)
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

A clutch assembly includes a first set of clutch plates and a second set of clutch plates interweaved with the first set of clutch plates. The second set of clutch plates is coupled to a rotatable inner hub, and a stationary backing plate is mounted about the inner hub. The first set of clutch plates is coupled to the backing plate such that the first set of clutch plates and the second set of clutch plates are compressed together with one of the first set or the second set of clutch plates abutting against the backing plate when the clutch assembly is engaged. The clutch assembly further includes a connecting hub coupled to the inner hub, such that the connecting hub supports the stationary backing plate with a bearing disposed between the connecting hub and the backing plate.

## Claims

### Claim 1

A clutch assembly comprising:
a first set of clutch plates and a second set of clutch plates interweaved with the first set of clutch plates, the second set of clutch plates being coupled to a rotatable input shaft;
a stationary backing plate mounted about the input shaft, the first set of clutch plates being coupled to the backing plate, the first set of clutch plates and the second set of clutch plates being compressed together with one of the first set or the second set of clutch plates abutting against the backing plate when the clutch assembly is engaged;
a gear set, the input shaft coupling the clutch assembly to the gear set when the clutch assembly is engaged;
a connecting hub coupled to a rotor hub so that the connecting hub and the rotor hub rotates at the same speed, the connecting hub having a generally annular shape defining an interior region and being disposed between the clutch assembly and the gear set; and
a bearing disposed in the interior region of the connecting hub and between the connecting hub and the backing plate such that the backing plate provides bearing support to the connecting hub and the rotor hub.

### Claim 2 (depends on 1)

The clutch assembly of claim 1 wherein the backing plate has an annular shape.

### Claim 3 (depends on 1)

The clutch assembly of claim 1 wherein the backing plate made from a powdered metal.

### Claim 4 (depends on 1)

The clutch assembly of claim 1 wherein the backing plate is made from steel.

### Claim 5 (depends on 1)

The clutch assembly of claim 1 wherein each of the first set of clutch plates and the second set of clutch plates has an annular shape.

### Claim 6 (depends on 1)

The clutch assembly of claim 1 wherein each of the first set of clutch plates and the second set of clutch plates is made of steel.

### Claim 7 (depends on 1)

The clutch assembly of claim 1 wherein each of the first set of clutch plates and the second set of clutch plates has a layer of material on either side of the plate to enhance the frictional capabilities of the plate.

### Claim 8 (depends on 1)

The clutch assembly of claim 1 wherein the clutch assembly includes a hydraulic operator.

### Claim 9 (depends on 8)

The clutch assembly of claim 8 wherein the hydraulic operator includes a chamber that receives hydraulic fluid to actuate the hydraulic operator.

### Claim 10 (depends on 9)

The clutch assembly of claim 9 wherein the hydraulic operator includes a piston that is disposed within the chamber, the piston compressing and releasing the first and second set of clutch plates as hydraulic fluid flows in and out of the chamber to engage and disengage the clutch assembly.