Torque-transmitting assembly and method

• US 6,702,081 B2
• Filed: 08/02/2002
• Issued: 03/09/2004
• Est. Priority Date: 08/02/2002
• Status: Expired due to Fees

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Moses, Robert Lowell, Gorman, Michael Joseph
• Primary Examiner(s): Lorence, Richard M.
• Application Number:
  US10/211,733
• Publication Number:
  US 20040020740A1
• Time in Patent Office: 585 Days
• Field of Search: 192/52.2, 192/70.21, 192/48.7, 192/66.23, 192/85.AA, 192/109.R, 188/71.5, 188/72.4
• US Class Current: 192/52.2
• CPC Class Codes: F16D 25/0638 with more than two discs, e.g. multiple lamellae

Abstract

A multi-mode torque-transmitting assembly includes a plate-supporting element having an axis, and a plate connected to the plate-supporting element such that the plate is axially movable with respect to the plate-supporting element between a first position and a second position in response to applied axial forces. Furthermore, the assembly includes a movement-inhibiting member in sufficient cooperation with the plate for selectively inhibiting axial movement of the plate. The movement-inhibiting member inhibits movement of the plate from the first position in response to a first axial force, and allows movement of the plate toward the second position in response to a second axial force greater than the first axial force, such that the assembly is operable in more than one mode.

Claims

1. A multi-mode torque-transmitting assembly comprising:

a plate-supporting element having an axis;

a plate connected to the plate-supporting element such that the plate is axially movable with respect to the plate-supporting element between a first position and a second position in response to applied axial forces; and

a movement-inhibiting member in sufficient cooperation with the plate for selectively inhibiting axial movement of the plate, wherein the movement-inhibiting member inhibits movement of the plate from the first position in response to a first axial force, and allows movement of the plate to move toward the second position in response to a second axial force greater than the first axial force, such that the assembly is operable in more than one mode;

wherein the movement-inhibiting member extends between the plate-supporting element and the plate.

2. The assembly of claim 1 wherein the plate-supporting element includes a recess, and the movement-inhibiting member is movably associated with the plate such that the movement-inhibiting member is movable between an engaged position, in which the movement-inhibiting member is engaged with the recess to maintain the plate generally at the first position, and a disengaged position, in which the movement-inhibiting member is sufficiently disengaged from the recess to allow the plate to move toward the second position.

3. The assembly of claim 2 wherein the plate includes a cavity, and the movement-inhibiting member is disposed at least partially in the cavity.

4. The assembly of claim 3 wherein the movement-inhibiting member includes a spring and a engaging element engaged with the spring.

5. The assembly of claim 1 wherein the plate-supporting element is a housing, and the plate is a reaction plate.

6. The assembly of claim 1 further comprising an actuator that cooperates with the plate to apply the first and second axial forces to the plate.

7. The assembly of claim 1 further comprising a spring that is engaged with the plate for urging the plate toward the first position.

8. The assembly of claim 1 further comprising an end plate that is connected to the plate-supporting element such that the end plate is not axially movable with respect to the plate-supporting element, and the movement-inhibiting member extends between the end plate and the plate.

9. The assembly of claim 8 wherein the plate-supporting element has a shoulder that is engageable with the plate when the plate is in the first position.

10. The assembly of claim 8 wherein the movement-inhibiting member comprises a spring element disposed between the end plate and the plate.

11. The assembly of claim 8 wherein the movement-inhibiting member includes a spring element retained by the end plate, and an engaging element disposed between the spring element and the plate.

12. The assembly of claim 11 further comprising a retaining device engaged with the end plate and the spring element for retaining the spring element.

13. The assembly of claim 11 wherein the end plate has a hole extending therethrough and is disposed between the spring element and the plate, and wherein the engaging element extends through the hole.

14. The assembly of claim 1 further comprising an additional plate that is engageable with the plate when the plate moves toward the second position.

15. The assembly of claim 14 wherein the plate has an angled surface that is engageable with the additional plate when the plate moves toward the second position.

16. The assembly of claim 15 wherein the additional plate extends at an angle with respect to the axis of the plate-supporting element.

17. The assembly of claim 14 further comprising an additional plate-supporting element that supports the additional plate such that the additional plate is axially movable with respect to the additional plate-supporting element.

18. The assembly of claim 17 wherein the additional plate-supporting element is stationary.

19. The assembly of claim 17 wherein the plate-supporting element is stationary.

20. The assembly of claim 17 wherein both the plate-supporting element and the additional plate-supporting element arc rotatable about the axis.

21. A multi-mode torque-transmitting assembly comprising:

a plate-supporting element having an axis;

a plate supported by the plate-supporting element such that the plate is axially movable with respect to the plate-supporting element between a first position and a second position in response to applied axial forces;

first and second additional plates positioned proximate the plate such that the plate is disposed between the additional plates, the additional plates being engageable with the plate; and

a movement-inhibiting member in sufficient cooperation with the plate for inhibiting axial movement of the plate, the movement-inhibiting member being configured to sufficiently inhibit axial movement of the plate when a first axial force is applied to the plate by the first additional plate so that the plate remains generally at the first position, the movement-inhibiting member further being configured to allow the plate to move toward the second position and engage the second additional plate when a second axial force greater than the first axial force is applied to the plate by the first additional plate.

22. A multi-mode torque-transmitting assembly comprising:

a plate-supporting element having an axis;

a plate pack including multiple plates, one of the plates being supported by the plate-supporting element such that the one plate is axially movable with respect to the plate-supporting element between a first position and a second position in response to applied axial forces;

a movement-inhibiting member in sufficient cooperation with the one plate for inhibiting axial movement of the one plate, the movement-inhibiting member being configured to maintain the one plate generally at the first position when a first axial force is applied to the plate pack such that a first quantity of the plates engage each other to transmit torque therebetween, the movement-inhibiting member further being configured to allow the one plate to move toward the second position when a second axial force greater than the first axial force is applied to the plate pack such that a second quantity of the plates engage each other to transmit torque therebetween, wherein the second quantity of the plates is greater than the first quantity of the plates; and

a return spring engaged with said one plate for urging said one plate toward the first position.

23. A method of operating a multi-mode torque-transmitting assembly in multiple modes, the torque-transmitting assembly having a plate disposed between first and second additional plates, the plate being axially movable between first and second positions in response to applied axial forces, the method comprising:

applying a first axial force to the first additional plate such that the first additional plate engages the plate, while inhibiting axial movement of the plate so that the plate remains generally at the first position, thereby operating the assembly in a first mode; and

applying a second axial force greater than the first axial force to the first additional plate such that the first additional plate causes the plate to move axially toward the second position in which the plate is engaged with the second additional plate, thereby operating the assembly in a second mode.