DE102016222870A1 - Two-piece central plate of a double clutch - Google Patents

Abstract

The invention relates to a central plate for a double clutch, wherein the dual clutch has at least two clutch plates; wherein the central plate is disk-shaped and has an axis of rotation, wherein the central plate on a first end side, circumferentially running in a circumferential direction and pointing in a first axial direction, first friction surface for contacting a first clutch disc and at a second end face, a circumferential in the circumferential direction having executed and pointing in a second axial direction, second friction surface for contacting a second clutch disc; wherein the first friction surface on a first sub-plate of the central plate and the second friction surface on a second sub-plate are arranged, wherein the sub-plates are arranged coaxially with each other; wherein the first sub-plate has first spoke elements extending inwardly from the first friction surface in a radial direction and the second sub-plate has second spoke elements extending inwardly from the second friction surface in the radial direction; wherein the partial plates in the region of the friction surfaces in the axial direction adjacent to each other are arranged adjacent to each other, wherein the first spoke elements and the second spoke elements are arranged overlapping each other in the axial direction.

Description

The invention relates to a central plate of a friction clutch designed as a double clutch, wherein the friction clutch can be used in particular in motor vehicles.

There are known as a double clutch friction clutches are known, which have a central plate. In this case, a first part clutch with a, in the axial direction relative to the central plate for clamping first friction linings of a first clutch disc and for opening and closing the first part clutch displaceable first pressure plate on one side of the central plate and a second part clutch with one, in the axial direction arranged opposite the central plate for clamping second friction linings of a second clutch disc and for opening and closing the second part clutch displaceable second pressure plate on an opposite side of the central plate.

The central plates are usually designed as castings, so produced by a primary molding process.

From the DE 10 2013 219 664 A1 is a two-part central plate is known, which is formed from two ring elements. Both ring elements are sheet metal parts, that is, by a forming process, and not just produced by a primary molding process. The central plate is made in two parts, so that the two ring elements (or two sub-plates) together have a heat capacity corresponding to the one-piece casting plate produced by the central plate. The central plate is arranged in the axial direction between two clutch plates, which are connected to transmit torque to a single output shaft. This embodiment of a friction clutch is referred to below as a double clutch.

The in the DE 10 2013 219 664 A1 shown central plate is connected in the radial direction outside the friction surfaces on a clutch cover and stored on this. But there are also known designs of central plates, wherein the central plate itself is mounted via a bearing mounted on a shaft or hub. For this purpose, the central plate regularly has a flange which extends inwardly from the friction surfaces in the radial direction and forms a bearing surface there on an inner circumferential surface.

A central plate designed as a sheet metal part can be produced by a simplified manufacturing process and thus save costs.

There is a constant need to simplify friction clutches and build as space-saving. On this basis, the present invention has the object, at least partially overcome the disadvantages discovered in the prior art and in particular to provide a central plate, which has further advantages in terms of saving space.

The object is solved by the features of independent claim 1. Advantageous developments are the subject of the dependent claims. The features listed individually in the claims can be combined in a technologically meaningful manner and can be supplemented by explanatory facts from the description and details of the figures, with further embodiments of the invention are shown.

The invention relates to a central plate for a double clutch, wherein the dual clutch has at least two clutch plates. The central plate is disk-shaped and has an axis of rotation. The central plate has, on a first end face, a first friction surface running circumferentially in a circumferential direction and pointing in a first axial direction, for contacting a first clutch disk. The central plate has, on a second end face, a second friction surface running circumferentially in the circumferential direction and pointing in a second axial direction, for contacting a second clutch disk. The first friction surface is disposed on a first sub-plate of the central plate and the second friction surface is disposed on a second sub-plate, wherein the sub-plates are arranged coaxially with each other. The first sub-plate has first spoke elements extending inwardly from the first friction surface in a radial direction. The second sub-plate has second spoke elements extending inwardly from the second friction surface in the radial direction. The partial plates are juxtaposed adjacent to one another in the region of the friction surfaces in the axial direction, wherein the first spoke elements and the second spoke elements are arranged overlapping one another in the axial direction.

By overlapping in the axial direction arrangement of the spoke elements, an additional space in the axial direction can be kept free. This space can z. B. are used for the arrangement of damping elements of the friction plates of the friction clutch. Next can be saved by the design with spoke elements material, so that the moment of inertia of the double clutch is reduced.

In particular, the spoke elements of a sub-plate in the circumferential direction are each through Window spaced apart. The spoke elements of a sub-plate are arranged in the windows of the respective other sub-plate, so that an overlapping in the axial direction arrangement of the spoke elements can be realized.

In particular, the windows of one sub-plate in the circumferential direction are wider than the arranged in these windows spoke elements of the other sub-plate. This results in openings in the central plate, which can contribute to the cooling of the friction clutch.

In particular, the first sub-panel and the second sub-panel are geometrically identical, at least in the region of the spoke elements. Preferably, the partial plates are made completely geometrically identical.

According to another embodiment, the first part plate and the second part plate are geometrically different at least in the region of the spoke elements, wherein only the first spoke elements (in addition to the extension in the radial direction) additionally extend in the axial direction towards the second part plate. The overlap in the axial direction of first spoke elements and second spoke elements is then realized by the first spoke elements.

In particular, the partial plates are connected to one another radially outside the spoke elements. In particular, the partial plates are connected to one another via connecting elements arranged in the region of the friction surfaces. Rivets can be used in particular as connecting elements.

At least one partial plate is preferably a sheet-metal part (ie a shaped part). Particularly preferred are both partial plates sheet metal parts. In particular, therefore, at least one partial plate (preferably both partial plates) is not manufactured by casting.

In particular, the spoke elements of at least one sub-plate are interconnected in the radial direction within the spoke elements by an annular connecting portion.

According to a further embodiment, the first spoke elements of the first sub-plate are interconnected in the radial direction within the first spoke elements by an annular first connecting portion and the second spoke elements of the second sub-plate in the radial direction within the second spoke elements by an annular second connecting portion. In this case, the first connecting portion and the second connecting portion form at least one, in the circumferential direction positive connection with each other.

Form-fitting connections are created by the interaction of at least two connection partners. As a result, the connection partners can not solve without or with interrupted power transmission. In other words, in the case of a positive connection, one connection partner gets in the way of the other.

In particular, the spoke elements of both partial plates form positive connections with each other in the circumferential direction as a result of the overlap in the axial direction.

In particular, the spoke elements and windows of the two partial plates are tolerated to each other so that a precisely fitting arrangement and centering of the two partial plates is ensured at least in the circumferential direction, possibly additionally in the radial direction. In particular, the tolerance comprises a clearance fit or a transition fit with respect to at least one of said directions (circumferential direction and radial direction). A mutual rotation of the partial plates in the circumferential direction and / or a displacement along the radial direction is then no longer possible or severely limited.

In addition, the connection sections can also form positive connections with each other.

Specifically, the first spoke members of the first sub-plate are connected to each other in the radial direction within the first spoke members by an annular first connecting portion and the second spoke members of the second sub-plate in the radial direction within the second spoke members by an annular second connecting portion, wherein one of the connecting portions in the radial direction extends inwardly than the other connecting portion and on an inner peripheral surface has a bearing surface of the central plate.

In particular, the central plate is rotatably mounted via the bearing surface on a bearing outer ring of a (rolling) bearing (eg on a transmission input shaft). It is preferred that the bearing surface is arranged only on an inner peripheral surface of a partial plate. Of course, however, it is also possible that the bearing surface extends over the inner peripheral surfaces of both partial plates, in which case, however, a close tolerance of the (two) bearing surfaces is required.

In particular, the first sub-plate in the radial direction outside of the first Friction surface, starting from the first friction surface (at least) in the first axial direction extending first receiving portions and the second sub-plate in the radial direction outside the second friction surface, extending from the second friction surface (at least) in the second axial direction extending second receiving portions ,

The receiving sections serve in particular the connection of the central plate to a clutch cover.

1. a. eine Zentralplatte nach einem der vorhergehenden Ansprüche sowie
2. b. eine erste Teilkupplung mit einer, in der axialen Richtung gegenüber der Zentralplatte zur Verspannung von ersten Reibbelägen einer ersten Kupplungsscheibe und zum Öffnen und Schließen der ersten Teilkupplung verlagerbaren ersten Anpressplatte;
3. c. eine zweite Teilkupplung mit einer, in der axialen Richtung gegenüber der Zentralplatte zur Verspannung von zweiten Reibbelägen einer zweiten Kupplungsscheibe und zum Öffnen und Schließen der zweiten Teilkupplung verlagerbaren zweiten Anpressplatte.

Furthermore, a friction clutch is proposed, designed as a double clutch, wherein the friction clutch has at least the following components:

1. a. a central plate according to one of the preceding claims and also
2. b. a first part clutch with a, in the axial direction relative to the central plate for clamping first friction linings of a first clutch disc and for opening and closing the first part clutch displaceable first pressure plate;
3. c. a second part clutch with a, in the axial direction relative to the central plate for clamping second friction linings of a second clutch disc and for opening and closing the second part clutch displaceable second pressure plate.

• 1: eine Reibungskupplung als Doppelkupplung mit einer Zentralplatte in einer Seitenansicht im Schnitt;
• 2: eine Reibungskupplung mit einer Zentralplatte in einer perspektivischen Ansicht im Schnitt;
• 3: eine Zentralplatte in einer Explosionsdarstellung in perspektivischer Ansicht;
• 4: die Zentralplatte nach 3 in perspektivischer Ansicht mit Blick auf die zweite Stirnseite;
• 5: die Zentralplatte nach 4 in perspektivischer Ansicht mit Blick auf die erste Stirnseite;
• 6: die Zentralplatte nach 5 in einer Seitenansicht in einem ersten Querschnitt;
• 7: die Zentralplatte nach 5 in einer Seitenansicht in einem zweiten Querschnitt.

The invention and the technical environment will be explained in more detail with reference to FIGS. It should be noted that the invention should not be limited by the embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description and / or figures. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. The same reference numerals designate the same objects, so that explanations of other figures can be used if necessary. Show it:

• 1 a friction clutch as a double clutch with a central plate in a side view in section;
• 2 a friction clutch with a central plate in a perspective view in section;
• 3 : a central plate in an exploded view in perspective view;
• 4 : the central plate after 3 in a perspective view overlooking the second end face;
• 5 : the central plate after 4 in a perspective view overlooking the first end face;
• 6 : the central plate after 5 in a side view in a first cross section;
• 7 : the central plate after 5 in a side view in a second cross section.

1 shows a friction clutch 2 as a double clutch with a central plate 1 in a side view in section. The friction clutch designed as a double clutch 2 includes a first part clutch 25 with one, in the axial direction 8th . 11 opposite the central plate 1 for tensioning first friction linings 26 a first clutch disc 3 and for opening and closing the first part clutch 25 displaceable first pressure plate 27 on one side of the central plate 1 and a second part clutch 28 with one, in the axial direction 8th . 11 opposite the central plate 1 for tensioning second friction linings 29 a second clutch disc 4 and for opening and closing the second part clutch 28 displaceable second pressure plate 30 on an opposite side of the central plate 1 , The central plate 1 is disc-shaped and has a rotation axis 5 on. The central plate 1 points to a first end face 6 one, in a circumferential direction 7 running circumferentially and in a first axial direction 8th pointing, first friction surface 9 for contacting a first clutch disc 3 on. The central plate 1 points to a second end face 10 one, in the circumferential direction 7 running circumferentially and in a second axial direction 11 pointing, second friction surface 12 for contacting a second clutch disc 4 on. The first clutch disc 3 is with a first output shaft 34 and the second clutch disc 4 with a second output shaft 35 connected torque transmitting.

2 shows a friction clutch 2 with a central plate 1 in a perspective view in section. The as a double clutch or as a clutch with two clutch discs 3 . 4 executed friction clutch 2 includes a first part clutch 25 with one, in the axial direction 8th . 11 opposite the central plate 1 for tensioning first friction linings 26 a first clutch disc 3 and for opening and closing the first part clutch 25 displaceable first pressure plate 27 on one side of the central plate 1 and a second part clutch 28 with one, in the axial direction 8th . 11 opposite the central plate 1 for tensioning second friction linings 29 a second clutch disc 4 and for opening and closing the second part clutch 28 displaceable second pressure plate 30 on an opposite side of the Central plate 1 , Here are both clutch discs 3 . 4 also with a single output shaft 34 be connected torque transmitting.

The central plate 1 includes a first sub-plate 13 and a second sub-plate 14 in the radial direction 15 outside the friction surfaces 9 . 12 over fasteners 18 with each other and via other fasteners with the clutch cover 31 are connected.

3 shows a central plate 1 in an exploded view in perspective view. 4 shows the central plate 1 to 3 in perspective view overlooking the second end face 10 , The 3 and 4 will be described together below.

3 and 4 each show a central plate 1 for a dual clutch, wherein the dual clutch at least two clutch discs 3 . 4 has (see 2 ). The central plate 1 is disc-shaped and has a rotation axis 5 on. The central plate 1 points to a first end face 6 one, in a circumferential direction 7 running circumferentially and in a first axial direction 8th pointing, first friction surface 9 for contacting a first clutch disc 3 on. The central plate 1 points to a second end face 10 one, in the circumferential direction 7 running circumferentially and in a second axial direction 11 pointing, second friction surface 12 for contacting a second clutch disc 4 on. The first friction surface 9 is on a first part plate 13 the central plate 1 and the second friction surface 12 is on a second part plate 14 arranged, with the sub-plates 13 . 14 are arranged coaxially with each other. The first part plate 13 points from the first friction surface 9 in a radial direction 15 inwardly extending first spoke elements 16 on. The second part plate 14 points from the second friction surface 12 in the radial direction 15 inwardly extending second spoke elements 17 on. The partial plates 13 . 14 are in the region of the friction surfaces 9, 12 in the axial direction 8th . 11 arranged one behind the other abutting, wherein the first spoke elements 16 and the second spoke elements 17 in the axial direction 8th . 11 are arranged overlapping each other.

The spoke elements 16 . 17 the partial plates 13 . 14 are in the circumferential direction 7 each through windows 32 . 33 spaced apart. The spoke elements 16 . 17 the one part plate 13 . 14 are in the windows 32 . 33 the other sub-plate 14 . 13 arranged so that in the axial direction 8th . 11 Covering arrangement of the spoke elements 16 . 17 is realized.

The first part plate 13 and the second part plate 14 are at least in the spoke elements 16 . 17 executed geometrically different, with only the first spoke elements 16 (next to the extent in the radial direction 15 ) additionally in the second axial direction 11 towards the second part plate 14 extend. The overlap in the axial direction 8th . 11 of first spoke elements 16 and second spoke elements 17 is then through the first spoke elements 16 realized. Due to the overlap in the axial direction 8th . 11 form the spoke elements 16 . 17 each in the circumferential direction 7 positive connections with each other.

The partial plates 13 . 14 are over, in the area of friction surfaces 9 . 12 arranged fasteners 18 interconnected (see 6 ). As connecting elements 18 rivets are used here.

Both partial plates 13 . 14 are designed as sheet metal parts.

The first spoke elements 16 the first part plate 13 are in the radial direction 15 within the first spoke elements 16 by an annular first connecting portion 19 and the second spoke elements 17 the second part plate 14 in the radial direction 15 within the second spoke elements 17 by an annular second connecting portion 20 connected with each other.

The central plate 1 is above, on the inner peripheral surface 21 the partial plates 13 . 14 arranged storage area 22 rotatably mounted on a bearing outer ring of a (rolling) bearing (eg on a transmission input shaft). In this case, the storage area extends 22 over the inner peripheral surfaces 21 both partial plates 13 . 14 ,

Next, the first sub-plate 13 in the radial direction 15 outside the first friction surface 9 , starting from the first friction surface 9 essentially in the first axial direction 8th extending first receiving sections 23 and the second part plate 14 in the radial direction 15 outside the second friction surface 12 , starting from the second friction surface 12 essentially in the second axial direction 11 extending second receiving sections 24 on. The recording sections 23 . 24 serve the connection of the central plate 1 to a clutch cover 31 or to an additional component, the friction clutch 2 connected to the internal combustion engine (usually gimbal springs or ZMS recording). The connection of the clutch cover 31 takes place only on the first receiving portion 23 (Direction of first partial clutch 25 ). The second receiving section 24 ensures the torque transmission from the engine (or damping intermediate components such as a DMF) to the central plate 1 and with it the friction clutch designed as a double clutch 2 ,

5 shows the central plate 1 to 4 in perspective view overlooking the first end face 6 , On the comments too 3 and 4 will be referred. Here is recognizable as the first front page 6 the central plate is executed. The second spoke elements 17 form second window 33 into which the first spoke elements are inserted 16 extend and so in the circumferential direction 7 positive connections with the second spoke elements 17 form.

6 shows the central plate 1 to 5 in a side view in a first cross section. 7 shows the central plate 1 to 5 in a side view in a second cross section. Both figures will be described together below.

The first cross section runs through the windows 32 . 33 the two partial plates 13 . 14 , The partial plates 13 . 14 pointing in the radial direction 15 from the outside to the inside first receiving sections 23 . 24 , followed by friction surfaces 13 . 14 , Storage elements 16 . 17 and connecting sections 19 . 20 on. The partial plates 13 . 14 are arranged adjacent to each other (in the region of the friction surfaces 13 . 14 and the connecting sections 19 . 20 ) and form in the axial direction 8th . 11 Overlaps in the area of the spoke elements 16 . 17 , The connecting sections 19 . 20 each have an inner circumferential surface 21 (here with step on the first part plate 13 ) on which a common storage area 22 for the arrangement of the central plate 1 form on a bearing outer ring of a rolling bearing.

The second cross section passes through a connecting element 18 (a rivet) in the friction surfaces 9 . 12 is arranged and over which the partial plates 13 . 14 for the formation of the central plate 1 are connected. Next, the second cross section extends through the second spoke elements 17 , which are shown here in section and accordingly through the first window 32 the first part plate 13 ,

LIST OF REFERENCE NUMBERS

1

Central plate

2

friction clutch

3

first clutch disc

4

second clutch disc

5

axis of rotation

6

first end face

7

circumferentially

8th

first axial direction

9

first friction surface

10

second end face

11

second axial direction

12

second friction surface

13

first part plate

14

second part plate

15

radial direction

16

first spoke element

17

second spoke element

18

connecting member

19

first connection section

20

second connection section

21

Inner circumferential surface

22

storage area

23

first receiving section

24

second receiving section

25

first part clutch

26

first friction lining

27

first pressure plate

28

second part clutch

29

second friction lining

30

second pressure plate

31

clutch cover

32

first window

33

second window

34

first output shaft

35

second output shaft

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102013219664 A1 [0004, 0005]

Claims (10)

Central plate (1) for a double-clutch friction clutch (2), wherein the friction clutch (2) has at least two clutch discs (3, 4); wherein the central plate (1) is disc-shaped and has an axis of rotation (5), wherein the central plate (1) on a first end face (6), in a circumferential direction (7) running circumferentially and in a first axial direction (8), First friction surface (9) for contacting a first clutch disc (3) and at a second end face (10), in the circumferential direction (7) circumferentially running and in a second axial direction (11) facing, second friction surface (12) for contacting a second clutch disc (4); wherein the first friction surface (9) on a first sub-plate (13) of the central plate (1) and the second friction surface (12) on a second sub-plate (14) are arranged, wherein the sub-plates (13, 14) are arranged coaxially to each other; wherein the first sub-plate (13) extends inwardly from the first friction surface (9) in a radial direction (15) inwardly extending first spoke elements (16) and the second sub-plate (14) extends from the second friction surface (12) in the radial direction (Fig. 15) have inwardly extending second spoke elements (17); wherein the partial plates (13, 14) in the region of the friction surfaces (9, 12) in the axial direction (8, 11) adjacent to each other are juxtaposed, wherein the first spoke elements (16) and the second spoke elements (17) in the (axial ) tangential direction (8, 11) are arranged overlapping each other. Central plate (1) after Claim 1 , Wherein the first partial plate (13) and the second partial plate (14) are geometrically identical at least in the region of the spoke elements (16, 17). Central plate (1) after Claim 1 , wherein the first part plate (13) and the second part plate (14) at least in the region of the spoke elements (16, 17) are designed geometrically different and only the first spoke elements (16) additionally in the second axial direction (11) towards the second Part plate (14) extend. Central plate (1) according to one of the preceding claims, wherein the partial plates (13, 14) via, in the region of the friction surfaces (9, 12) arranged connecting elements (18) are connected. Central plate (1) according to one of the preceding claims, wherein at least one partial plate (13, 14) is a sheet metal part. A central plate (1) according to any one of the preceding claims, wherein the spoke elements (16, 17) of at least one sub-plate (13, 14) in the radial direction (15) within the spoke elements (16, 17) are connected by an annular connecting portion (19, 20). connected to each other. A central plate (1) according to any one of the preceding claims, wherein the first spoke elements (16) of the first sub-plate (13) in the radial direction (15) within the first spoke elements (16) are joined by an annular first connecting portion (19) and the second spoke elements (16). 17) of the second sub-plate (14) in the radial direction (15) within the second spoke elements (17) by an annular second connecting portion (20) are interconnected, wherein the first connecting portion (19) and the second connecting portion (20) at least one in the circumferential direction (7) form a positive connection with each other. A central plate (1) according to any one of the preceding claims, wherein the first spoke elements (16) of the first sub-plate (13) in the radial direction (15) within the first spoke elements (16) are joined by an annular first connecting portion (19) and the second spoke elements (16). 17) of the second sub-plate (14) in the radial direction (15) within the second spoke elements (17) by an annular second connecting portion (20) are interconnected, wherein one of the connecting portions (19, 20) in the radial direction (15 ) further inwardly than the other connecting portion (20, 19) and on an inner peripheral surface (21) has a bearing surface (22) of the central plate (1). The central plate (1) according to any one of the preceding claims, wherein the first sub-plate (13) extends in the radial direction (15) outside the first friction surface (9) extending from the first friction surface (9) in the first axial direction (8) first receiving portions (23) and the second sub-plate (14) in the radial direction (15) outside the second friction surface (12), starting from the second friction surface (12) in the second axial direction (11) extending second receiving portions (24) exhibit. Friction clutch (2), designed as a double clutch, at least having a. a central plate (1) according to one of the preceding claims and b. a first part clutch (25) with one, in the axial direction (8, 11) relative to the central plate (1) for clamping first friction linings (26) of a first clutch disc (3) and for opening and closing the first part clutch (25) displaceable first pressure plate (27); c. a second sub-coupling (28) with one, in the axial direction (8, 11) relative to the central plate (1) for clamping second friction linings (29) of a second clutch disc (4) and for opening and Closing of the second partial clutch (28) displaceable second pressure plate (29).

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