CN109661524B

CN109661524B - Double clutch for a motor vehicle

Info

Publication number: CN109661524B
Application number: CN201780054262.8A
Authority: CN
Inventors: P·许贝尔
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2016-09-19
Filing date: 2017-08-25
Publication date: 2021-04-20
Anticipated expiration: 2037-08-25
Also published as: DE112017004681A5; CN109661524A; WO2018050158A1; DE102016217851A1

Abstract

The invention relates to a double clutch for coupling a drive shaft of a motor vehicle to one of two transmission input shafts of a transmission, having at least one counterplate and two pressure plates for frictionally pressing a respective clutch disk between the at least one counterplate and each pressure plate, wherein the first pressure plate is arranged in the axial direction on a first side of the at least one counterplate and a clutch cover and a first lever spring are arranged on an opposite second side of the at least one counterplate, wherein the first pressure plate can be displaced in the axial direction by the first lever spring relative to the at least one counterplate and the clutch cover via at least one tension rod; wherein at least one leaf spring is used to transmit torque and ensure displacement of the first pressure plate, the at least one leaf spring being attached on the one hand to at least one pull rod which is displaceable with the first pressure plate in the axial direction and on the other hand to the clutch cover or to at least one counterplate.

Description

Double clutch for a motor vehicle

Technical Field

The invention relates to a double clutch for coupling a drive shaft of a motor vehicle to one of two transmission input shafts of a transmission, having at least one counterplate and two pressure plates for the frictional pressing of a respective clutch disk between the at least one counterplate and each pressure plate.

Background

Such a double clutch is known from DE 102013207694 a 1. The first pressure plate is arranged on a first side of the counterplate in the axial direction and on a second, opposite side of the counterplate a clutch cover and a first lever spring are arranged, wherein the first pressure plate can be displaced in the axial direction relative to the at least one counterplate and the clutch cover by means of the first lever spring via a pull rod. The tie rod has an annular rolling bearing for the first lever spring and a plurality of traction means which each extend from the rolling bearing in the axial direction toward the first pressure plate. The tie rod is connected to the first pressure plate in the axial direction beyond the counterpressure plate by means of a pulling element.

A spring element, for example a leaf spring, is used for transmitting the torque and providing the axial displaceability of the pressure plates, which leaf spring connects the first pressure plate with a pressure plate that is fixed in position in the axial direction. The leaf spring is usually arranged on a first side of the counterpressure plate and extends from there at least in the circumferential direction towards the attachment point on the first pressure plate. It is also known to combine the attachment point on the first compression plate with the attachment point of the pulling member on the first compression plate. In this case, traction means of different lengths are used, since usually only three leaf spring sets are provided for one partial clutch, but more traction means are provided.

Disclosure of Invention

The object of the present invention is to structurally and/or functionally improve a double clutch known from DE 102013207694 a 1. In particular, an arrangement of the leaf springs that is as space-saving as possible should be achieved.

A dual clutch is proposed for clutching a drive shaft of a motor vehicle to one of two transmission input shafts of a transmission. The dual clutch comprises at least one counterplate and two pressure plates for the frictional pressing of the respective clutch disk between the at least one counterplate and each pressure plate, wherein a first pressure plate is arranged in the axial direction on a first side of the at least one counterplate. The dual clutch further includes a clutch cover and a first lever spring disposed on a second side of the at least one counterplate opposite the first side. The first pressure plate is displaceable in the axial direction relative to the at least one counterplate and the clutch cover by the first lever spring via at least one pull rod. The dual clutch furthermore comprises at least one leaf spring for transmitting torque and ensuring a displacement of the first pressure plate, which leaf spring is attached on the one hand to at least one pull rod which is displaceable with the first pressure plate in the axial direction and on the other hand to the clutch cover or to the at least one counterplate.

The initially mentioned DE 102013207694 a1 is hereby incorporated in its entirety. The double clutch according to the invention corresponds in particular substantially to the double clutch of DE 102013207694 a 1.

In particular, the dual clutch can also have a plurality of counterplates which are arranged so as to be stationary in the axial direction and relative to which the pressure plate can be displaced in the axial direction. The double clutch also has a tie rod which is arranged on the second side of the counterplate and interacts with the first lever spring for displacing the first pressure plate arranged on the first side of the counterplate.

In particular, a plurality of leaf springs (or leaf spring groups) are provided in the circumferential direction, which leaf springs are arranged uniformly spaced apart from one another in the circumferential direction.

Preferably, the at least one leaf spring is arranged on the second side of the at least one counterpressure plate in the axial direction.

The arrangement of the at least one leaf spring proposed here makes it possible to gain installation space in the circumferential direction in the region between the first pressure plate and the counter pressure plate. This is advantageous in particular for double clutches with a small outer diameter.

In particular, the at least one tension rod is connected to the first pressure plate via a plurality of pulling means, which each extend from a rolling bearing for the first lever spring in the axial direction toward the first pressure plate, wherein the pulling means are arranged distributed in the circumferential direction. In this case, at least one leaf spring is arranged between two tension elements arranged adjacent to one another in the circumferential direction and is connected via a first attachment point to the clutch cover or to the at least one counterplate and via a second attachment point to the at least one tension rod.

Preferably, the first attachment point and the second attachment point are arranged to overlap in the radial direction. The arrangement so as to overlap in the radial direction means in particular that the at least one leaf spring extends substantially in the circumferential direction (and possibly additionally in the axial direction). The first and second attachment points are then arranged at substantially equal distances from the rotational axis of the dual clutch.

In particular, the first attachment point is arranged closer to the first side than the second attachment point. This means in particular that the at least one leaf spring extends from the first attachment point in the axial direction from the first side towards the second side.

Preferably, the at least one tie rod extends from the connection with the first stripper plate in the axial direction beyond the first attachment point. The tie rod or the pulling element of the tie rod extending in the axial direction thereby extends in the axial direction from the second side in the direction of the first side beyond the first attachment point.

In particular, the at least one tension rod has an annular roller bearing for the first lever spring and is connected to the first pressure plate at third attachment points by means of a plurality of pulling means, which each extend from the roller bearing in the axial direction toward the first pressure plate, wherein the distance between each third attachment point and the roller bearing is in each case of equal size in the axial direction.

The annular rolling-bearing portions are arranged at the same position in the circumferential direction in the axial direction. In this way, the first lever spring, which is in particular annular, can be supported during operation of the friction clutch, so that the pull rod can be displaced in the axial direction by the first lever spring, and thus the first pressure plate can be displaced in the axial direction. The arrangement proposed here of the leaf springs now makes it possible to realize a correspondingly equal length embodiment of the traction means, which extends in the axial direction as part of the tie rod. Thereby, uniform operation of the first compression plate can be ensured.

In particular, the at least one leaf spring is connected to the clutch cover via a first attachment point, wherein the first attachment point is arranged on a first attachment surface of the clutch cover, wherein the first attachment surface is arranged spaced apart from a connecting portion between the clutch cover and the at least one counterplate in the axial direction.

Preferably, the at least one tie rod is connected to the first pressure plate via a plurality of pulling means, which each extend from the rolling bearing in the axial direction toward the first pressure plate, wherein the pulling means are arranged distributed (uniformly) in the circumferential direction and are connected via a circumferential flange; wherein the second attachment point is arranged on a second attachment face of the tie rod, wherein the second attachment face is configured on the flange.

In particular annular rolling bearings are arranged in the radial direction within the flange.

According to a further embodiment, the at least one tie rod is connected to the first press plate at a third attachment point by a plurality of pulling means, which each extend from the rolling bearing in the axial direction towards the first press plate, wherein the pulling means are arranged distributed (evenly) in the circumferential direction and are connected by a flange that surrounds in the circumferential direction. The at least one leaf spring is connected with the at least one tie rod by a second attachment point, wherein the second attachment point is arranged on a third attachment face of the tie rod, wherein a third attachment face is configured by a first shoulder on each of the traction means, wherein the third attachment face is arranged spaced apart from the third attachment point and from the flange in the axial direction.

Drawings

The invention and the technical environment are explained in detail below with reference to the drawings. It is to be noted that the invention should not be limited by the illustrated embodiments. In particular, unless explicitly stated otherwise, sub-aspects of the facts stated in the figures can also be extracted and combined with other constituents of the description and knowledge and/or figures. It is to be expressly noted that the drawings and the dimensional ratios indicated in particular are merely schematic. Like reference numerals denote like objects, so that explanations from other drawings can be additionally considered as necessary. It shows that:

FIG. 1: motor vehicle with a dual clutch according to DE 102013207694 a1, wherein the dual clutch is only partially shown in a side view and in a sectional view;

FIG. 2: a perspective view of the components of the dual clutch according to the first embodiment variant; and

FIG. 3: a perspective view of the components of the double clutch according to the second variant embodiment.

Detailed Description

Fig. 1 shows a motor vehicle 3 with a dual clutch 1 according to DE 102013207694 a1, the dual clutch 1 being shown only partially in a side view and the dual clutch 1 being shown in a sectional view. Reference is made to DE 102013207694 a1 for the description of the dual clutch 1, which is fully incorporated in this case.

DE 102013207694 a1 discloses that the first pressure plate 8 is connected to the counterpressure plate 7 in a rotationally fixed manner by means of a leaf spring 18, but can nevertheless be displaced in the axial direction in a limited manner. Reference is also made to DE 102013207694 a1 for a functional description of the leaf spring 18 in the dual clutch 1, which description is also fully incorporated in this case. The leaf spring 18 is not shown in fig. 1. Therefore, consider fig. 1 for the purpose of illustrating the presently proposed dual clutch 1.

The dual clutch 1 is provided for clutching a drive shaft 2 of a motor vehicle 3 to one of two transmission input shafts 4, 5 of a transmission 6, wherein the members have a common axis of rotation 32. The dual clutch 1 comprises a counter plate 7 and two pressure plates 8, 9 for frictionally pressing a respective

clutch disk

10, 11 between the counter plate 7 and each pressure plate 8, 9. The first pressure plate 8 is arranged on a first side 12 of the counterplate 7, and on an opposite second side 15 of the counterplate 7 a clutch cover 13 and a first lever spring 14 are arranged, wherein the first pressure plate 8 can be displaced in the axial direction 17 relative to the clutch cover 13 by the first lever spring 14 via a pull rod 16.

The dual clutch 1 according to the "three-plate design" is obtained by a common pressure plate 7 for the two friction clutches.

Furthermore, the dual clutch 1 comprises a plurality of leaf springs 18 for transmitting torque and ensuring displacement of the first pressure plate 8, which leaf springs are attached on the one hand on at least one tie rod 16 which can be displaced with the first pressure plate 8 in the axial direction 17 and on the other hand on the clutch cover 13 or on at least one counterplate 7. A leaf spring 18 is arranged on the second side 15 of the counter pressure plate 7 in the axial direction 17 (see fig. 2 and 3).

The tie rods 16 are connected to the first pressure plate 8 at third attachment points 25 by means of a plurality of pulling means 19, which each extend from an annular rolling bearing 20 for the first lever spring 14 in the axial direction 17 toward the first pressure plate 8, wherein the pulling means 19 are arranged distributed along the circumferential direction 21. The pulling elements 19 are connected to one another in the circumferential direction 21 by a collar 28 that runs around in the circumferential direction 21. The annular rolling bearing 20 is arranged in the radial direction 17 within the flange 28. The spacing 26 between each third attachment point 25 and the rolling bearing 20 is respectively of the same size in the axial direction 17.

The annular rolling-contact bearings 20 are arranged at the same position in the circumferential direction 21 in the axial direction 17. Thereby, the annular first lever spring 14 can be supported when the friction clutch is operated, so that the pull rod 16 can be displaced in the axial direction 17 by the first lever spring 14, and thus the first pressure plate 8 can be displaced in the axial direction. The arrangement proposed here of the leaf spring 18 enables a correspondingly equal length embodiment of the traction means 19, which extends as part of the tie rod 16 in the axial direction 17. Thereby, uniform operation of the first pressing plate 8 can be ensured.

Fig. 2 shows a perspective view of the components of the dual clutch 1 according to the first embodiment variant. The leaf spring 18 is arranged between two traction means 19 of the tie rod 16, which are arranged adjacently in the circumferential direction 21, and is connected to the clutch cover 13 by a first attachment point 22 and to the tie rod 16 by a second attachment point 23. The first attachment point 22 and the second attachment point 23 are arranged to overlap in the radial direction 24. The first attachment point 22 and the second attachment point 23 are arranged at a substantially equal distance from the rotational axis 32 of the dual clutch 1.

The first attachment point 22 is arranged closer to the first side 12 than the second attachment point 23. That is, the leaf spring 18 extends from the first attachment point 22 in the axial direction 17 from the first side 12 towards the second side 15.

The tie rod 16 extends from the third attachment point 25 on the first stripper plate 8 beyond the first attachment point 22 in the axial direction 17. The tie rod 16 or the pulling element 19 of the tie rod 16 extending in the axial direction 17 therefore extends in the axial direction 17 from the second side 15 in the direction of the first side 12 beyond the first attachment point 22.

In a first embodiment variant, the leaf spring 18 is connected with the clutch cover 13 by means of a first attachment point 22, wherein the first attachment point 22 is arranged on a first attachment face 27 of the clutch cover 13, wherein the first attachment face 27 is arranged spaced apart from a connecting portion 33 between the clutch cover 13 and the counterplate 7 in the axial direction 17. The clutch cover 13 therefore has an additional second shoulder 34 in this case, so that the first attachment surface 27 can be arranged in the axial direction 17 at a position predetermined by the leaf spring 18 and the second attachment point 23 (here on the flange 28 of the tie rod 16). The second attachment point 23 of the leaf spring 18 is arranged on a second attachment surface 29 of the tie rod 16, wherein the second attachment surface 29 is formed on the flange 28.

Fig. 3 shows a perspective view of components of the double clutch 1 according to a second variant embodiment. Reference is made to the embodiments of figures 1 and 2. In contrast to the first embodiment variant, the leaf spring 18 is connected to the tie rod 16 via a second attachment point 23, wherein the second attachment point 23 is arranged on a third attachment surface 30 of the tie rod 16, wherein the third attachment surface 30 is formed by a first shoulder 31 on each of the pulling elements 19, wherein the third attachment surface 30 is arranged spaced apart from the third attachment point 25 and from the flange 28 in the axial direction 17. In the second embodiment variant, each pull element 19 of the tie rod 16 therefore has an additional first shoulder 31, so that the third attachment surface 30 can be arranged in the axial direction 17 at a position predetermined by the leaf spring 18 and the first attachment point 22 (here on the clutch cover 13 or on the connection to the counterplate 7; if appropriate also directly on the counterplate 7).

List of reference numerals

1 double clutch

2 drive shaft

3 Motor vehicle

4 first clutch input shaft

5 second Clutch input shaft

6 speed variator

7 pairs of pressing plates

8 first extrusion plate

9 second extrusion plate

10 first clutch disc

11 second clutch disc

12 first side

13 Clutch cover

14 first lever spring

15 second side

16 draw bar

17 axial direction

18 leaf spring

19 traction element

20 rolling bearing

21 circumferential direction

22 first attachment point

23 second attachment point

24 radial direction

25 third attachment point

26 space apart

27 first attachment surface

28 Flange

29 second attachment surface

30 third attachment surface

31 first shoulder

32 axis of rotation

33 connecting part

34 second shoulder.

Claims

1. A dual clutch (1) for coupling a drive shaft (2) of a motor vehicle (3) to one of two transmission input shafts (4, 5) of a transmission (6), having at least one counterplate (7) and two pressure plates for the frictional pressing of a respective clutch disk (10, 11) between the at least one counterplate (7) and each pressure plate, wherein the two pressure plates comprise a first pressure plate which is arranged in the axial direction (17) on a first side (12) of the at least one counterplate (7) and on a second, opposite side (15) of the at least one counterplate (7) is arranged a clutch cover (13) and a first lever spring (14), wherein the first pressure plate can be pressed by means of at least one pull rod (16) by means of the first lever spring (14) relative to the at least one counterplate (7) and to the clutch plate (14) The closure cap (13) is displaced in the axial direction (17), wherein the at least one pull rod (16) is connected to the first stripper plate by a plurality of pulling elements (19); wherein at least one leaf spring (18) is used for transmitting torque and ensuring the displacement of the first pressure plate in the axial direction (17), which leaf spring is attached on the one hand on at least one pull rod (16) which is displaceable with the first pressure plate in the axial direction (17) and on the other hand on the clutch cover (13) or the at least one counterplate (7);

wherein the at least one leaf spring is connected by:

the at least one leaf spring (18) is connected with the clutch cover (13) by a first attachment point (22), wherein the first attachment point (22) is arranged on a first attachment face (27) of the clutch cover (13), wherein the first attachment face (27) is arranged spaced apart from a connection portion (33) between the clutch cover (13) and the at least one counterplate (7) in the axial direction (17).

2. The dual clutch (1) as claimed in claim 1, wherein the at least one leaf spring (18) is arranged on a second side (15) of the at least one counterplate (7) in the axial direction (17).

3. The dual clutch (1) as claimed in claim 1, wherein the pulling elements each extend from a rolling bearing (20) for the first lever spring (14) in the axial direction (17) towards the first pressure plate, wherein the pulling elements (19) are arranged distributed in the circumferential direction (21); wherein the at least one leaf spring (18) is arranged between two traction means (19) arranged adjacently in the circumferential direction (21) and is connected to the clutch cover (13) or the at least one counterplate (7) by a first attachment point (22) and to the at least one tie rod (16) by a second attachment point (23).

4. The dual clutch (1) as claimed in claim 3, wherein the first attachment point (22) and the second attachment point (23) are arranged to overlap in a radial direction (24).

5. The dual clutch (1) as claimed in claim 4, wherein the first attachment point (22) is arranged closer to the first side (12) than the second attachment point (23).

6. The dual clutch (1) as claimed in claim 1, wherein the at least one tie rod (16) extends from the connection with the first pressure plate in the axial direction (17) beyond the first attachment point (22).

7. The dual clutch (1) as claimed in one of the preceding claims, wherein the at least one tie rod (16) has an annular rolling bearing (20) for the first lever spring (14) and is connected to the first pressure plate at third attachment points (25) by means of a plurality of pulling elements (19) which each extend from the rolling bearing (20) in the axial direction (17) toward the first pressure plate, wherein the spacing between each third attachment point (25) and the rolling bearing (20) is in each case of equal magnitude in the axial direction (17).

8. The dual clutch (1) as claimed in one of claims 3, 4, 5, wherein the at least one tie rod (16) is connected to the first pressure plate by means of a plurality of pulling elements (18) which each extend from a rolling bearing (20) for the first lever spring (14) in the axial direction (17) towards the first pressure plate, wherein the pulling elements (19) are arranged distributed in a circumferential direction (21) and are connected by a flange (28) which surrounds in the circumferential direction (21); wherein the second attachment point (23) is arranged on a second attachment surface (29) of the tie rod (16), wherein the second attachment surface (29) is configured on the flange (28).

9. The dual clutch (1) according to claim 1 or 2, wherein the at least one tie rod (16) is connected with the first pressure plate at a third attachment point (25) by means of a plurality of pulling elements (19) which respectively extend from a rolling bearing (20) for the first lever spring (14) in the axial direction (17) towards the first pressure plate, wherein the pulling elements (19) are arranged distributed along a circumferential direction (21) and are connected by a flange (28) which surrounds in the circumferential direction (21); wherein the at least one leaf spring (18) is connected to the at least one tie rod (16) by means of a second attachment point (23), wherein the second attachment point (23) is arranged on a third attachment surface (30) of the tie rod (16), wherein the third attachment surface (30) is configured by means of a first shoulder (31) on each pulling piece of the pulling pieces (19), wherein the third attachment surface (30) is arranged spaced apart from the third attachment point (25) and from the flange (28) in the axial direction (17).