Lever system

Patent metadata

Field	Value
Publication number	US-9726230-B2
Application number	US-201314412606-A
Country	US
Kind code	B2
Filing date	Jun 17, 2013
Priority date	Jul 3, 2012
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A lever system for actuating at least one clutch, comprising at least one pivotable lever that has a certain bending stiffness. The lever has at least one flexurally elastic zone which is designed and/or arranged in such a way that the bending stiffness of the lever varies in accordance with an actuation path of the clutch.

First claim

What is claimed is:

1. A lever system for actuating at least one clutch, comprising:
at least one pivotable lever having a first flexural rigidity, wherein said lever has at least one flexurally elastic region, the at least one flexurally elastic region including a second flexural rigidity and is designed and/or arranged in such a way that said flexural rigidity of said lever varies as a function of an actuating path of said clutch;
a carriage positioned on a bottom surface of the lever, wherein the carriage is arranged at a first end of the lever and a second end of the lever, opposite the first end, is pivotably fixed at a pivot.

2. The lever system recited in claim 1 , wherein said lever has a negative rigidity gradient across said actuating path of said clutch.

3. The lever system recited in claim 1 , wherein an actuating contact region is arranged between the pivot and a contact region for an upper roller of the carriage.

4. The lever system recited in claim 3 , wherein a cam track is formed in said contact region for said upper roller on said lever in such a way that said actuating path of said clutch increases as a distance between said roller and a clutch axis increases.

5. The lever system recited in claim 3 , wherein said flexurally elastic region is arranged between said actuating contact region and said pivot.

6. The lever system recited in claim 3 , wherein said flexurally elastic region extends from said pivot beyond said actuating contact region.

7. The lever system recited in claim 3 , wherein said flexurally elastic region is implemented by a counter-spring on which said pivot is mounted.

8. The lever system recited in claim 1 , wherein said lever for actuating two partial clutches of a twin clutch is combined with a lever actuator.

9. An actuating device for actuating at least one clutch comprising said lever system as recited in claim 1 .

10. A clutch device comprising at least one clutch that has a regressive characteristic map and is actuated by said lever system as recited in claim 1 .

11. The lever system recited in claim 1 , wherein the second flexural rigidity is different than the first flexural rigidity.

12. The lever system recited in claim 1 , wherein the second flexural rigidity is less than the first flexural rigidity.

13. A lever system for actuating at least one clutch, comprising:
at least one pivotable lever having a first flexural rigidity and a contact area to output an actuation force of said lever, wherein said lever has at least one flexurally elastic region, the at least one flexurally elastic region including a second flexural rigidity and is designed and/or arranged in such a way that said flexural rigidity of said lever varies as a function of an actuating path of said clutch, said lever pivotably secured at a first end of said lever;
wherein, the contact area of said lever is arranged on said lever at a first distance from said first end of said lever, and said flexurally elastic region is arranged on said lever at a second distance from said first end of said lever.

14. The lever system recited in claim 13 , wherein said first distance is greater than said second distance.

15. The lever system recited in claim 13 , wherein said first distance is less than said second distance.

16. The lever system recited in claim 13 , wherein said first distance is equal to said second distance.

Assignees

• Schaeffler Technologies Ag

Inventors

• Herkommer Dominik
• Baehr Markus

Classifications

• Y10T74/20564

  Flexible · CPC title

• Y10T74/20582

  Levers · CPC title

• F16D2023/126

  Actuation by rocker lever; Rocker levers therefor · CPC title

• F16D23/12 Primary

  Mechanical clutch-actuating mechanisms arranged outside the clutch as such (specific for combined clutches F16D21/00; mechanisms specific for synchronisation F16D23/02) · CPC title