Limiting torque clutch in an input damper

Patent metadata

Field	Value
Publication number	US-9435390-B2
Application number	US-201414532130-A
Country	US
Kind code	B2
Filing date	Nov 4, 2014
Priority date	Nov 16, 2011
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

The present disclosure provides an input damper for coupling to a torque-generating mechanism. The damper includes an outer cover, a hub, and a carrier assembly coupled to the hub. The carrier assembly is movably disposed within the cover. A clutch assembly moves between an engaged position and a disengaged position. The input damper further includes an angular displacement mechanism operably coupled to the clutch assembly for moving the clutch assembly between the engaged position and disengaged position. A damper spring is disposed between the outer cover and the clutch assembly. The outer cover is coupled to the carrier assembly in the engaged position.

First claim

What is claimed is:

1. An input damper for coupling to a torque-generating mechanism, comprising:
an outer cover;
a hub having a plurality of splines configured to couple to an input shaft;
a carrier assembly coupled to the hub, where the carrier assembly is movably disposed within the cover;
a clutch assembly having an engaged position and a disengaged position, the clutch assembly being biased towards the engaged position;
an angular displacement mechanism operably coupled to the clutch assembly for moving the clutch assembly between the engaged position and disengaged position; and
a damper spring disposed in the outer cover and having a compressed position and an uncompressed position, where the damper spring is rotationally coupling the outer cover to the clutch assembly;
wherein, when the clutch assembly is in the engaged position, the damper spring is in the uncompressed position and the outer cover is coupled to the carrier assembly;
wherein the angular displacement mechanism comprises a first portion and a second portion, the first portion being disposed on the cover and the second portion being disposed on the carrier assembly;
wherein the first portion is an angled surface of the cover and the second portion is a ramp defined in the carrier assembly, where contact between the angled surface and ramp induces a movement of the clutch assembly from the engaged position to the disengaged position.

2. The input damper of claim 1 , wherein the clutch assembly comprises a backing plate, friction material, and a spring biasedly disposed against the backing plate.

3. The input damper of claim 2 , wherein the backing plate is coupled to the hub.

4. The input damper of claim 2 , wherein the friction material is coupled to the backing plate, hub or carrier assembly.

5. The input damper of claim 1 , further comprising:
a first backing plate having friction material disposed on a side thereof facing the carrier assembly; and
a second backing plate having friction material disposed on a side thereof facing the carrier assembly;
wherein, in the engaged position the friction material on the first and second backing plates is in contact with the carrier assembly and in the disengaged position the friction material on the first and second backing plates is not in contact with the carrier assembly.

6. The input damper of claim 1 , wherein the clutch assembly comprises a backing plate, a flange portion of the hub, friction material disposed on at least one of the backing plate and flange portion, and a spring biasedly disposed against the backing plate.

7. The input damper of claim 1 , further comprising more than one damper spring disposed in the outer cover.

8. The input damper of claim 1 , wherein the outer cover comprises a first shell and a second shell, where at least one of the first shell and second shell is coupled to the angular displacement mechanism.

9. The input damper of claim 1 , wherein:
the carrier assembly comprises a first thickness and a second thickness, the first thickness being greater than the second thickness; and
the ramp is defined between the first thickness and second thickness.

10. The input damper of claim 1 , wherein:
the cover comprises a first width and a second width, the first width being greater than the second width; and
the angled surface is defined between the first width and second width.

11. An input damper for coupling to a torque-generating mechanism, comprising:
an outer cover;
a hub having a plurality of splines configured to couple to an input shaft;
a carrier assembly coupled to the hub, where the carrier assembly is movably disposed within the cover;
a clutch assembly having an engaged position and a disengaged position, the clutch assembly being biased towards the engaged position;
an angular displacement mechanism operably coupled to the clutch assembly for moving the clutch assembly between the engaged position and disengaged position; and
a damper spring disposed in the outer cover and having a compressed position and an uncompressed position, where the damper spring is rotationally coupling the outer cover to the clutch assembly;
wherein, when the clutch assembly is in the engaged position, the damper spring is in the uncompressed position and the outer cover is coupled to the carrier assembly; and
wherein the angular displacement mechanism comprises:
a ramp defined along a surface of the outer cover; and
a wedging mechanism disposed between the outer cover and carrier assembly, the wedging mechanism being movable relative to the ramp;
wherein, the clutch assembly is in the engaged position when the wedging mechanism is not in contact with the ramp, and the clutch assembly is in the disengaged position when the wedging mechanism is in contact with the ramp.

12. The input damper of claim 11 , wherein the wedging mechanism comprises a pin, a roller, a ball, or an angled surface.

13. An input damper, assembly, comprising:
an outer cover having a first shell and a second shell;
a hub;
a carrier assembly coupled to the hub, the carrier assembly being at least partially disposed in the outer cover and adapted to move relative to one of the first shell and second shell;
a clutch assembly having an engaged position and a disengaged position, the clutch assembly including a backing plate coupled to the hub, where friction material disposed on the backing plate is in contact with the carrier assembly in the engaged position;
an angular displacement mechanism operably coupled to the clutch assembly for moving the clutch assembly between the engaged position and the disengaged position; and
a damper spring disposed between the outer cover and the clutch assembly, where the damper spring has a compressed position and an uncompressed position;
wherein, when the damper spring is in the compressed position, the angular displacement mechanism moves the clutch assembly from the engaged position to the disengaged position and the outer cover is not coupled to the carrier assembly;
wherein the angular displacement mechanism comprises a first portion and a second portion, the first portion being disposed on the cover and the second portion being disposed on the carrier assembly; and
wherein the first portion is an angled surface of the cover and the second portion is a ramp defined in the carrier assembly, where contact between the angled surface and ramp induces a movement of the clutch assembly from the engaged position to the disengaged position.

14. The input damper assembly of claim 13 , wherein the clutch assembly comprises a spring biasedly disposed against the backing plate.

15. An input damper assembly, comprising:
an outer cover having a first shell a second shell;
a hub;
a carrier assembly coupled to the hub, the carrier assembly being at least partially disposed in the outer cover and adapted to move relative to one of the first shell and second shell;
a clutch assembly having an engaged position and a disengaged position, the clutch assembly including a backing plate coupled to the hub, where friction material disposed on the backing plate is in contact with the carrier assembly in the engaged position;
an angular displacement mechanism operably coupled to the clutch assembly for moving the clutch assembly between the engaged position and the disengaged position; and
a damper spring disposed between the outer cover and the clutch assembly, where the damper spring has a compressed position and an uncompressed position;
wherein, when the damper spring is in the compressed position, the angular displacement mechanism moves the

Assignees

• Allison Transm Inc

Inventors

• Copeland Kevin A

Classifications

• F16F15/12373 Primary

  the sets of springs being arranged at substantially the same radius · CPC title

• F16D13/22

  with axially-movable clutching members (similar brakes F16D55/00) · CPC title

• F16F15/1297

  Overload protection, i.e. means for limiting torque · CPC title

• F16D2023/123

  Clutch actuation by cams, ramps or ball-screw mechanisms · CPC title

• F16F15/129

  characterised by friction-damping means ({F16F15/1202, F16F15/1238} , F16F15/131 take precedence) · CPC title