Vibration damping device for motor vehicle transmission drivetrain

Patent metadata

Field	Value
Publication number	US-10533627-B2
Application number	US-201615546213-A
Country	US
Kind code	B2
Filing date	Jan 22, 2016
Priority date	Jan 29, 2015
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A damping device for damping vibrations of a motor vehicle transmission drivetrain. The damping device features a first element and a second element (2) rotationally movable around a rotation axis X, an elastic damping member having an elastic blade (13, 14) mounted rotationally integrally with the first element (3) and a rolling body movable with respect to the second element along a curvilinear trajectory over at least a predetermined angular sector (A). Movement of the rolling body along the curvilinear trajectory with respect to the second element is accompanied by a movement of the rolling body on the elastic blade, causing the elastic blade to flex.

First claim

The invention claimed is:

1. A damping device for damping torsional vibrations of a motor vehicle transmission drivetrain, the damping device comprising:
a first element ( 3 ) and a second element ( 2 , 102 ) rotationally movable around a rotation axis X;
an elastic damping member coupling the first element ( 3 ) and the second element ( 2 , 102 ) so as to allow torque transmission with vibration damping between the first element ( 3 ) and the second element ( 2 , 102 ), the torque transmission with damping being accompanied by relative rotation between the first element ( 3 ) and the second element ( 2 , 102 ); and
a rolling body moveable with respect to the second element along a curvilinear trajectory over at least a predetermined angular sector (A);
the elastic damping member including at least one elastic blade ( 13 , 14 , 113 , 114 ) mounted rotationally integrally with the first element ( 3 );
movement of the rolling body along the curvilinear trajectory with respect to the second element being accompanied by a movement of the rolling body on the at least one elastic blade, causing the at least one elastic blade to flex.

2. The damping device according to claim 1 , wherein the curvilinear trajectory of the rolling body with respect to the second element has a circumferential geometric component.

3. The damping device according to claim 2 , wherein a first raceway ( 17 , 117 ) and a second raceway ( 18 , 118 ) are carried respectively by the at least one elastic blade ( 13 , 14 , 113 , 114 ) and by the second element ( 2 ); wherein the rolling body ( 15 , 16 , 115 , 116 ) is configured to move on the first raceway ( 17 , 117 ) and the second raceway ( 18 , 118 ) in order to allow an angular deflection between the first element ( 3 ) and the second element ( 2 , 102 ); wherein the first raceway ( 17 , 117 ) and the second raceway ( 18 , 118 ) are configured so that in a relative angular position between the first element ( 3 ) and the second element ( 2 , 102 ) which differs from an inactive relative position, the rolling body ( 15 , 16 , 115 , 116 ) exerts a flexural load on the at least one elastic blade ( 13 , 14 , 113 , 114 ), producing an opposite reaction force of the at least one elastic blade ( 13 , 14 , 113 , 114 ) on the rolling body ( 15 , 16 , 115 , 116 ), and wherein the opposite reaction force has a circumferential component capable of returning the first and second elements ( 2 , 102 , 3 ) to the inactive relative position.

4. The damping device according to claim 2 , wherein the predetermined angular sector is greater than 20°.

5. The damping device according to claim 1 , wherein a first raceway ( 17 , 117 ) and a second raceway ( 18 , 118 ) are carried respectively by the at least one elastic blade ( 13 , 14 , 113 , 114 ) and by the second element ( 2 ); wherein the rolling body ( 15 , 16 , 115 , 116 ) is configured to move on the first raceway ( 17 , 117 ) and the second raceway ( 18 , 118 ) in order to allow an angular deflection between the first element ( 3 ) and the second element ( 2 , 102 ); wherein the first raceway ( 17 , 117 ) and the second raceway ( 18 , 118 ) are configured so that in a relative angular position between the first element ( 3 ) and the second element ( 2 , 102 ) which differs from an inactive relative position, the rolling body ( 15 , 16 , 115 , 116 ) exerts a flexural load on the at least one elastic blade ( 13 , 14 , 113 , 114 ), producing an opposite reaction force of the at least one elastic blade ( 13 , 14 , 113 , 114 ) on the rolling body ( 15 , 16 , 115 , 116 ), and wherein the opposite reaction force has a circumferential component capable of returning the first and second elements ( 2 , 102 , 3 ) to the inactive relative position.

6. The damping device according to claim 5 , wherein the first and second raceways ( 17 , 18 , 117 , 118 ) are arranged facing one another.

7. The damping device according to claim 5 , wherein the first raceway ( 17 , 117 ) is situated radially inside the second raceway ( 18 , 118 ).

8. The damping device according to claim 5 , wherein the first and second raceways ( 17 , 18 , 117 , 118 ) are configured so that in the relative angular position between the first element ( 3 , 103 ) and the second element ( 2 ) which is different from the inactive relative position, the rolling body ( 15 , 16 ) exerts on the at least one elastic blade ( 13 , 14 , 113 , 114 ) the flexural load having a radial component, producing the opposite reaction force of the at least one elastic blade having an outwardly directed radial component capable of keeping the rolling body ( 15 , 16 ) in contact with the first and second raceways ( 17 , 18 , 117 , 118 ) ( 17 , 18 , 117 , 118 ).

9. The damping device according to claim 5 , wherein the second element ( 2 ) has lateral walls ( 6 , 8 ) bordering the second raceway ( 18 , 118 ) and the rolling body ( 15 , 16 , 115 , 116 ) in order to axially retain the rolling body.

10. The damping device according to claim 5 , wherein the second raceway ( 18 , 118 ) is configured on a part applied onto the second element ( 2 ).

11. The damping device according to claim 5 , comprising:
a plurality of elastic blades ( 13 , 14 , 113 , 114 ) are mounted rotationally integrally with the first element ( 3 );
a plurality of pairs of raceways each having a first raceway ( 17 , 117 ) are carried by a respective elastic blade ( 13 , 14 , 113 , 114 ) and a second raceway ( 18 , 118 ) carried by the second element ( 2 , 102 ); and
a plurality of rolling bodies ( 15 , 16 , 115 , 116 ) each interacting with a respective pair of the raceways.

12. The damping device according to claim 5 , wherein the predetermined angular sector is greater than 20°.

13. The damping device according to claim 1 , wherein the predetermined angular sector is greater than 20°.

14. The damping device according to claim 1 , wherein the rolling body ( 15 , 16 ) is a cylindrical roller, and wherein each of ends of the rolling body is equipped with a protrusion ( 19 ) projecting axially along an axis of revolution of the cylindrical roller.

15. The damping device according to claim 1 , wherein the at least one elastic blade ( 13 , 14 , 113 , 114 ) has a region ( 20 , 120 ) for fastening onto the first element ( 3 ) and an elastic region having an inner arm ( 22 , 122 ), an outer arm ( 24 , 124 ) and a bent region ( 23 , 123 ) connecting the inner arm ( 22 , 122 ) and the outer arm ( 24 , 124 ).

16. The damping device according to claim 1 , further comprising limit stops ( 26 , 27 ) configured to limit a relative angular deflection between the first element ( 3 ) and the second element ( 2 , 102 ).

17. The damping device according to claim 1 , wherein the predetermined angular sector is greater than 60°.

18. The damping device according to claim 1 , wherein the predetermined angular sector is greater than 90°.

19. A damping device for damping torsional vibrations of a motor vehicle transmission drivetrain, the damping device comprising:
a first element ( 3 ) and a second element ( 2 , 102 ) rotationally movable around a rotation axis X;
an elastic damping member coupling the first element ( 3 ) and the second element ( 2 , 102 ) to allow torque transmission with vibration damping between the first element ( 3 ) and the second element ( 2 , 102 ), the torque transmission with damping being accompanied by relative rotation between the first element ( 3 ) and the second element ( 2 ,

Assignees

• Valeo Embrayages

Inventors

• Dutier Ivan
• Boulet Jerome
• Maurel Herve

Classifications

• F16F2230/0064

  using a cam · CPC title

• F16F15/13157 Primary

  with a kinematic mechanism or gear system, e.g. planetary (F16F15/13128 takes precedence) · CPC title

• F16H2057/0012

  for reducing drive line oscillations · CPC title

• F16F15/1333

  Spiral springs, e.g. lying in one plane, around axis of rotation · CPC title

• F16F15/1336 Primary

  Leaf springs, e.g. radially extending · CPC title