Torsion damping device comprising elastic members held individually in position by phase washer

Patent metadata

Field	Value
Publication number	US-9366312-B2
Application number	US-201214115409-A
Country	US
Kind code	B2
Filing date	Apr 24, 2012
Priority date	May 4, 2011
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A torsion damping device ( 10 ) of an automotive temporary coupling system, comprising: a torque input element ( 12 A, 12 B) and a torque output element ( 18 ); an upstream circumferentially acting elastic member ( 36 A) capable of being loaded by or of loading the input element ( 12 A, 12 B); a downstream circumferentially acting elastic member ( 36 B) capable of loading or of being loaded by the output element ( 18 ); a radial phase washer ( 40 A, 40 B) arranged so that the two elastic members ( 36 A, 36 B) are mounted in series; each elastic member ( 36 A, 36 B) is received circumferentially between a phasing face ( 50 A, 50 B) and an oppositely located radial retention face ( 52 B, 52 A) of the phase washer ( 40 A, 40 B), the circumferential distance (D) between said faces ( 50 A, 50 B, 52 B, 52 A) being equal at most to the circumferential length of the elastic member at rest.

First claim

The invention claimed is:

1. A torsion damping device ( 10 ) between an axially oriented coaxial drive shaft and driven shaft in an automotive temporary coupling system, the device ( 10 ) comprising:
a torque input element ( 12 A, 12 B) and a torque output element ( 18 );
at least one first, upstream circumferentially acting elastic member ( 36 A), an upstream circumferential end face ( 38 A) of which is capable of being loaded by or of loading the torque input element ( 12 A, 12 B);
at least one second, downstream circumferentially acting elastic member ( 36 B), a downstream circumferential end face ( 38 B) of which is capable of loading or of being loaded by the output element ( 18 );
at least one first radial phase washer ( 40 A, 40 B) rotatable with respect to the torque input element ( 12 A, 12 B) and the torque output element ( 18 ), the at least one first radial phase washer ( 40 A, 40 B) having at least two windows ( 46 );
the downstream end face ( 38 B) of the at least one upstream elastic member ( 36 A) being capable of loading or of being loaded by an upstream radial phasing face ( 50 A) of the at least one first radial phase washer ( 40 A, 40 B), and the upstream end face ( 38 A) of the at least one downstream elastic member ( 36 B) being capable of being loaded by or of loading a downstream radial phasing face ( 50 B) of the at least one first radial phase washer ( 40 A, 40 B), such that the two elastic members ( 36 A, 36 B) are mounted in series; and
a drive hub ( 16 ) non-rotatably connected to the torque input element ( 12 A, 12 B) such that a radially inner portion of the drive hub ( 16 ) is non-rotatably connected to a radially inner portion of the torque input element ( 12 A, 12 B);
each of the at least two windows ( 46 ) receiving only one of the at least one upstream elastic member ( 36 A) or the at least one downstream elastic member ( 36 B) so that each of the upstream and downstream elastic members ( 36 A, 36 B) is received circumferentially between the associated phasing face ( 50 A, 50 B) and an associated oppositely located radial retention face ( 52 B, 52 A) of the at least one first radial phase washer ( 40 A, 40 B).

2. The device ( 10 ) according to claim 1 , wherein the elastic members ( 36 A, 36 B) are arranged on the circumference of a single circle, the phasing faces ( 50 A, 50 B) thus being carried by one common radial phasing tab ( 48 ) of the at least one first radial phase washer ( 40 A, 40 B) which is interposed between the upstream elastic member ( 36 A) and the downstream elastic member ( 36 B).

3. The device ( 10 ) according to claim 1 , wherein the device ( 10 ) comprises first and second radial phase washers ( 40 A, 40 B) that are arranged axially on either side of the input and output elements ( 12 A, 12 B, 18 ) and that are fastened onto one another; and wherein the phase washers ( 40 A, 40 B) have means for capturing the elastic members ( 36 A, 36 B) in order to retain them axially and radially in position.

4. The device ( 3 ) according to claim 3 , wherein each of the first and second radial phase washers ( 40 A, 40 B) is in the shape of an annular washer coaxial with the torque input element ( 12 A, 12 B) and the torque output element ( 18 ).

5. The device ( 10 ) according to claim 4 , wherein the first and second radial phase washers ( 40 A, 40 B) are axially spaced from each other.

6. The device ( 10 ) according to claim 5 , wherein the first and second radial phase washers ( 40 A, 40 B) are non-rotatably fastened to each other.

7. The device ( 10 ) according to claim 1 , wherein the at least one first radial phase washer ( 40 A, 40 B) is in the shape of an annular washer coaxial with the torque input element ( 12 A, 12 B) and the torque output element ( 18 ).

8. The device ( 10 ) according to claim 1 , wherein the at least one first radial phase washer ( 40 A, 40 B) is axially spaced from the torque input element ( 12 A, 12 B).

9. The device ( 10 ) according to claim 1 , wherein the drive hub ( 16 ) selectively connectable to the drive shaft through a locking clutch.

10. The device ( 10 ) according to claim 1 , wherein a circumferential distance (D) between the phasing face ( 50 A, 50 B) and the oppositely located retention face ( 52 B, 52 A) being equal to or less than the circumferential length of the elastic member at rest.

11. The device ( 10 ) according to claim 10 , wherein the circumferential distance (D) between each of the upstream and downstream phasing faces ( 50 A, 50 B) and the oppositely located retention face ( 52 B, 52 A) is less than the length of the elastic member ( 36 A, 36 B) at rest, so that the elastic member ( 36 A, 36 B) is received in circumferentially constrained fashion between the retention face ( 52 A, 52 B) and the associated phasing face ( 50 B, 50 A).

12. The device ( 10 ) according to claim 1 , further comprising a bearing ( 28 ) having a first cylindrical guidance surface ( 26 ) and a second cylindrical guidance surface ( 42 ) arranged axially in front of the first cylindrical guidance surface ( 26 ), wherein the first cylindrical guidance surface ( 26 ) has a diameter different than a diameter of the second cylindrical guidance surface ( 42 ) of the bearing ( 28 ), and wherein the at least one first radial phase washer ( 40 A, 40 B) is mounted to rotate freely on the second cylindrical guidance surface ( 42 ) of the bearing ( 28 ).

13. The device ( 10 ) according to claim 12 , wherein the first cylindrical guidance surface ( 26 ) of the bearing ( 28 ) is separated from the second cylindrical guidance surface ( 42 ) by a front facing radial shoulder surface ( 44 ) radially extending between the first cylindrical guidance surface ( 26 ) and the second cylindrical guidance surface ( 42 ); and wherein the at least one first radial phase washer ( 40 A, 40 B) abuts axially against the front facing radial shoulder surface ( 44 ) in order to axially position the at least one first radial phase washer ( 40 A, 40 B) with respect to the torque input element ( 12 A, 12 B).

14. A hydrodynamic converter comprising a turbine wheel, a locking clutch comprising a drive hub ( 16 ) and a torsion damping device ( 10 ), the torsion damping device ( 10 ) comprising:
a torque input element ( 12 A, 12 B) and a torque output element ( 18 );
at least one first, upstream circumferentially acting elastic member ( 36 A), an upstream circumferential end face ( 38 A) of which is capable of being loaded by or of loading the input element ( 12 A, 12 B);
at least one second, downstream circumferentially acting elastic member ( 36 B), a downstream circumferential end face ( 38 B) of which is capable of loading or of being loaded by the output element ( 18 ); and
at least one first radial phase washer ( 40 A, 40 B) rotatable with respect to the torque input element ( 12 A, 12 B) and the torque output element ( 18 ), the downstream end face ( 38 B) of each upstream elastic member ( 36 A) being capable of loading or of being loaded by an upstream radial phasing face ( 50 A) of the phase washer ( 40 A, 40 B), and the upstream end face ( 38 A) of each downstream elastic member ( 36 B) being capable of being loaded by or of loading a downstream radial phasing face ( 50 B) of the phase washer ( 40 A, 40 B), such that the two elastic members ( 36 A, 36 B) are mounted in series;
a radially inner portion of the drive hub ( 16 ) is non-rotatably connected to a radially inner portion of the torque input element ( 12 A, 12 B);
each of the elastic members ( 36 A, 36 B) is received circumferentially between the associated phasing face ( 50 A, 50 B) and a

Assignees

• Grieco Giovanni
• Termenon Norberto
• Valeo Embrayages

Inventors

• Grieco Giovanni
• Termenon Norberto

Classifications

• F16H2045/0231

  arranged in series · CPC title

• F16F15/12373 Primary

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

• F16F15/145

  Masses mounted with play with respect to driving means thus enabling free movement over a limited range · CPC title

• F16F15/12313

  characterised by the dimension or shape of spring-containing windows · CPC title