DE112006003467T5 - Multiple clutch unit, especially for motor vehicles - Google Patents

Abstract

Multiple coupling unit (1), comprising:
At least a first and a second friction clutch disc (37a, 37b),
At least one abutment plate having a first (31a) and a second (31b) abutment plate half,
At least one first (41a) and one second (41b) pressure plate which can clamp the friction clutch discs (37a, 37b) against the abutment plate halves (31a, 31b),
- A flywheel (7) for transmitting the engine torque to the coupling unit (1),
- damping means inserted between the flywheel (7) and the abutment plate (31a, 31b), these damping means comprising:
At least two guide discs (13, 15, 51, 53),
A plurality of springs (17; 55) arranged between these two guide disks,
- At least one damping disc (19, 49) which is arranged between these two guide discs and cooperates with the springs, wherein the two abutment plate halves (31a, 31b) on both sides of the damping disc (19, 49) are arranged,
and
Friction means (25, 57) inserted between the guide discs and the damping disc, ...

Description

The The present invention relates to a multiple clutch unit, especially for motor vehicles.

A multiple clutch unit comprises a plurality of clutches, usually two clutches, as especially from the document EP 1 361 102 is known.

A Such a coupling unit has above all the advantage that It allows gear changes without torque interruption.

A However, such a coupling unit has the disadvantage that they have a greater axial space requirement than a single clutch brings with it.

at However, this axial space requirement is now a critical Factor in connection with the arrangement of the coupling unit between the engine and transmission of certain vehicles.

Of the The present invention is in particular based on the object to propose a multiple clutch unit having a smaller axial Space requirements compared to those currently available on the market Has multiple coupling units.

• – wenigstens eine erste und eine zweite Reibungskupplungsscheibe,
• – wenigstens eine Widerlagerplatte mit einer ersten und einer zweiten Widerlagerplattenhälfte,
• – wenigstens eine erste und eine zweite Druckplatte, welche die besagten Reibungskupplungsscheiben gegen die besagten Widerlagerplattenhälften klemmen können,
• – ein Schwungrad zur Übertragung des Motordrehmoments an die besagte Kupplungseinheit,
• – zwischen dem besagten Schwungrad und der besagten Widerlagerplatte eingefügte Dämpfungsmittel, wobei diese Dämpfungsmittel folgendes umfassen:
• – wenigstens zwei Führungsscheiben,
• – mehrere zwischen diesen zwei Führungsscheiben angeordnete Federn,
• – wenigstens eine Dämpfungsscheibe, die zwischen diesen zwei Führungsscheiben angeordnet ist und mit den besagten Federn zusammenwirkt, und
• – zwischen den besagten Führungsscheiben und der besagten Dämpfungsscheibe eingefügte Reibungsmittel,

wobei die besagten Federn zumindest nahezu vollständig radial aus den Reibbahnen der besagten Reibungskupplungsscheiben auf ihren jeweiligen Widerlagerplattenhälften heraus versetzt sind.This object of the invention is achieved with a multiple clutch unit comprising:

• At least a first and a second friction clutch disc,
• At least one abutment plate having a first and a second abutment plate half,
• At least a first and a second pressure plate which can clamp said friction clutch discs against said abutment plate halves,
• A flywheel for transmitting the engine torque to said coupling unit,
• - Damping means inserted between said flywheel and said abutment plate, said damping means comprising:
• At least two guide discs,
• A plurality of springs arranged between these two guide disks,
• - At least one damping disc, which is arranged between these two guide discs and cooperates with said springs, and
• Friction means inserted between said guide discs and said damper disc,

wherein said springs are offset at least substantially completely radially out of the friction paths of said friction clutch disks on their respective abutment plate halves.

The staggered arrangement of the springs radially outside the Reibbahnen the friction clutch discs allows a reduction the total thickness between the friction surfaces of the two abutment plate halves, without thereby increasing their mechanical or thermal strength as far as the need is their respective volume for receiving the guide discs and to change the springs.

Thereby results in the possibility of the axial space requirement to reduce the coupling unit according to the invention.

Furthermore It should be noted that the staggered arrangement of the springs radially outside the friction tracks of the friction clutch disks the springs are removed from said friction tracks, that is of areas where due to the friction of the friction clutch discs very high on their respective abutment plate halves Temperatures can occur.

Thereby the springs are protected against such temperatures, so that the longevity of these springs can be significantly increased.

About that In addition, the offset out of the friction paths allows Arrangement of the springs a significant improvement in reliability and the life of the coupling according to the invention compared to the prior art couplings.

To another optional feature of the invention Coupling unit, the said springs are at least almost complete offset radially outside of said friction paths.

This Feature allows for magnification the angular deflection of the guide discs in proportion to the damping disk and thereby improve the Efficiency of the damping means.

• – Die besagten Führungsscheiben sind fest mit dem besagten Schwungrad verbunden, während die besagte Dämpfungsscheibe fest mit den besagten beiden Plattenhälften verbunden ist.
• – Wenigstens eine der besagten Führungsscheiben bedeckt einen signifikanten Teil der besagten Dämpfungsscheibe, wobei die besagten Reibungsmittel zwischen radial inneren Teilen dieser Führungsscheibe und dieser Dämpfungsscheibe eingefügt ist.
• – Die besagten Dämpfungsmittel umfassen eine Federscheibe und eine Reibscheibe, wobei diese Reibscheibe durch eine der besagten Führungsscheiben angetrieben wird und an der besagten Dämpfungsscheibe in Reibung tritt.

According to further optional features of the coupling unit according to the invention the following is provided:

• - The said guide discs are fixedly connected to the said flywheel, while said damping disc is fixedly connected to said two plate halves.
• At least one of said guide discs covers a significant portion of said one Damping disc, wherein said friction means is inserted between radially inner parts of this guide disc and this damping disc.
• - The said damping means comprise a spring washer and a friction disc, said friction washer is driven by one of said guide discs and occurs at the said damping disc in friction.

• – wenigstens zwei ersten Führungsscheiben,
• – mehreren zwischen diesen zwei ersten Führungsscheiben angeordneten ersten Federn,
• – wenigstens einer ersten Dämpfungsscheibe, die zwischen diesen zwei ersten Führungsscheiben angeordnet ist und mit den besagten ersten Federn zusammenwirkt, und
• – zwischen den besagten ersten Führungsscheiben und der besagten ersten Dämpfungsscheibe eingefügten ersten Reibungsmitteln und eine zweite Dämpfungseinheit mit:
• – wenigstens zwei zweiten Führungsscheiben,
• – mehreren zwischen diesen zwei zweiten Führungsscheiben angeordneten zweiten Federn,
• – wenigstens einer zweiten Dämpfungsscheibe, die zwischen diesen zwei zweiten Führungsscheiben angeordnet ist und mit den besagten zweiten Federn zusammenwirkt, und
• – zwischen den besagten zweiten Führungsscheiben und der besagten Dämpfungsscheibe eingefügten zweiten Reibungsmitteln.

According to another embodiment of the coupling unit according to the invention, this coupling unit comprises a first damping unit with:

• At least two first guide discs,
• A plurality of first springs arranged between these two first guide disks,
• - At least a first damping disc, which is arranged between these two first guide discs and cooperates with said first springs, and
• - First friction means inserted between said first guide discs and said first damping disc and a second damping unit comprising:
• At least two second guide discs,
• A plurality of second springs arranged between these two second guide disks,
• - At least a second damping disc, which is arranged between these two second guide discs and cooperates with said second springs, and
• - Second friction means inserted between said second guide discs and said damper disc.

These another embodiment of the invention Coupling unit comprising two damping stages is particularly advantageous in that they have a larger Total angular deflection of the damping means allows whereby the filtering of the transmitted through the crankshaft Torsional vibrations is improved.

To another optional feature of the invention Coupling unit has at least one of said guide discs a relatively high mass concentration at its periphery.

By This feature is the possibility that the guide disc the function of a flywheel as a supplement (or even as a replacement) of the flywheel connected to the crankshaft can.

To another optional feature of the invention Coupling unit define the said guide discs closed shots for the said springs.

This Feature allows protection of the springs in particular against the strong temperature increases that in the areas of friction tracks of the friction clutch disks their respective abutment plate halves occur.

To another optional feature of the invention Coupling unit are seals in the connection area between said guide washers and the associated Damping disc arranged.

This Feature makes it possible to attach the springs in tight chambers and use them in a lubricant, increasing their longevity is improved accordingly.

To another optional feature of the invention Coupling unit are said friction means of the said Abutment plate halves through the said guide discs separated.

This Feature allows the springs to be opposite the Insulate areas of high temperature, with the guide discs then act as a kind of heat shield.

To another optional feature of the invention Coupling unit contain said abutment plate halves Cooling holes, said friction means at least partially opposite these openings are arranged.

This Feature allows ventilation of the friction means, which in turn can prevent these friction agents be exposed to high temperatures.

To another optional feature of the invention Coupling unit contain said abutment plate halves Cooling holes, said springs at least partially arranged opposite these openings are.

This Feature allows ventilation of the springs, which in turn can prevent these springs from being too high Be exposed to temperatures.

• – Die besagten Plattenhälften sind durch Stege miteinander verbunden, um die konische Verformung dieser Plattenhälften zu begrenzen.
• – Das besagte Schwungrad ist flexibel ausgeführt.

According to further optional features of the coupling unit according to the invention the following is provided:

• - The said plate halves are interconnected by webs to limit the conical deformation of these plate halves.
• - The said flywheel is flexible.

Other features and benefits of the invention The coupling unit according to the invention will become apparent from the following description with reference to the accompanying figures.

In this show in detail:

1 an axial sectional view of a first embodiment of the coupling unit according to the invention,

2 an axial sectional view of a second embodiment of the coupling unit according to the invention and

3 a front view of the damping means of the coupling unit of 2 ,

in the Further progress of the description, the invention is based on represented by two embodiments of a double or double clutch become.

It However, it should be noted that the present invention not limited to double clutches, but rather is generally applicable to multiple couplings, regardless of whether they are normally open or normally closed are.

First, it will open 1 Reference is made, in which it can be seen that the coupling unit 1 inside a stationary clutch bell 3 is arranged.

This coupling unit is the input side with a crankshaft 5 , for example via a flywheel 7 , and output side with two coaxial transmission shafts 9 . 11 connected.

The flywheel 7 , which could possibly be made flexible, is on a serving as a guide disc in approximately circular part 13 fixed, which has a relatively high mass concentration at its periphery, whereby it receives a large inertia in relation to the axis of rotation of the coupling unit.

This part 13 as well as a plate 15 with which it is firmly connected, form the two guide discs of several coil springs 17 , which are evenly distributed around the axis of rotation of the coupling unit.

In detail, the two guide discs 13 and 15 designed to take closed shots for the springs 17 form.

Between these two guide discs, an approximately circular damping disc extends 19 that with the coil springs 17 interacts.

As is known per se, the damping disk 19 in relation to the two guide discs 13 . 15 rotatably opposite by the coil springs 17 provided resistance stored.

In the connection area of the guide discs 13 . 15 with the damping disk 19 are preferably seals 21 arranged.

It should also be noted that the inside of the two guide discs 13 . 15 formed recordings advantageously guide grooves 23 to guide the springs 17 are provided.

The guide disc 13 covers a significant portion of the damper disc 19 , and between the radially inner parts, that is, the parts of these two elements that are closest to the axis of rotation of the coupling unit, are friction means 25 arranged.

These friction means, which are known per se and are referred to as "hysteresis means", typically comprise a spring washer 27 applying an axial load to a friction disc 29 which, in turn, acts on the damper disc 19 comes to the plant.

The friction disc 29 is with an angular play in relation to the guide disc 13 stored and is taken after a certain deflection by this. It is in relation to the damping disk 19 rotatably mounted.

On both sides of the damping disc 19 are two abutment plate halves 31a . 31b arranged, which together form an abutment plate 31 form.

Through two rows of rivets 33a and 33b , Which serve as webs and which are located radially near or away from the axis of rotation of the coupling unit, are the two abutment plate halves 31a . 31b and the damping disk 19 firmly connected.

Between the abutment plate half 31a and the damping disk 19 There is a gap, the insertion and the rotation of the guide disc 13 allows the circumferential grooves to the passage of the rivet 33b to enable.

It should be noted that the two plate halves 31a . 31b preferably uniformly distributed openings 35a . 35b included, which are arranged opposite the area in which the friction medium 25 are located.

On both sides of the abutment plate halves 31a . 31b are lining carrier discs 36a . 36b arranged, the friction linings on its periphery 37a . 37b wear.

As "friction tracks" 39a . 39b become the parts of the abutment plate halves 31a . 31b referred to, with the friction linings 37a . 37b can interact.

printing plates 41a . 41b can the friction linings 37a . 37b with the two abutment plate halves 31a . 31b sandwich.

As is well known, the printing plates can 41a . 41b under the influence of diaphragm springs 43a respectively. 43b be moved axially, in turn, each by a finger 45 , which is displaceable inside the shaft 9 is mounted, and by an axially movable release bearing 47 be operated.

It should be noted that the coil springs 17 advantageously radially outside of the friction paths 39a . 39b are arranged.

The Operation of the coupling unit described above and their advantages arise directly from the preceding explanations.

The engine torque is through the crankshaft 5 to the flywheel 7 transfer.

This flywheel 7 in turn transmits this torque to the guide discs 13 . 15 , in turn, this torque to the damping disk 19 transmitted, which takes place via the damping means, on the one hand by the coil springs 17 and on the other hand by the friction means 25 be formed.

These damping means allow filtering through the crankshaft 5 to the coupling unit 1 transmitted torsional or torsional vibrations.

The respective operations of the finger 45 and the release bearing 47 optionally allow the clamping of the friction linings 37a between the abutment plate half 31a and the printing plate 41a or the friction linings 37b between the abutment plate half 31b and the printing plate 41b ,

This allows the engine torque to be selectively applied to the shaft 9 or to the wave 11 be transmitted.

The staggered arrangement of the coil springs 17 radially outside the friction tracks 39a . 39b allows the use of abutment plates 31a . 31b with a more uniform average thickness than in the devices according to the prior art and thus a smaller space requirement with constant mechanical and thermal behavior.

Namely, in the present invention, the receptacles in which the coil springs 17 not on these abutment plate halves 31a . 31b extend, a smaller average thickness of these two abutment plate halves is sufficient to give them the required mechanical strength.

It should also be noted that the radial displacement of the coil springs 17 it makes it possible to arrange these away from an area of particularly strong temperature increases due to the friction of the friction linings 37a . 37b at their respective abutment plates 31a . 31b is exposed.

This allows the springs 17 be protected from the impairments associated with the pronounced temperature rises without the respective thicknesses of the abutment plate halves 31a . 31b would have to be increased.

It should therefore be understood that the coupling of the invention allows a reduction of the axial space requirement compared to the devices of the prior art, so that this coupling unit compatible with a particularly compact clutch bell 3 can be designed.

Causing a guide disc 13 is provided with a high rotational inertia in relation to the axis of the coupling unit, this guide disc can take over the function of an additional flywheel.

Because of the two guide discs 13 . 15 closed and through the seals 21 to define sealed shots, the springs can 17 be used in a lubricant.

The presence of the guide grooves 23 that adhere to the shape of the feathers 17 adjust allows proper guidance of these springs inside their respective recordings.

Because of openings 35a . 35b towards the friction agents 25 are provided, these friction agents can be properly cooled.

The presence of the bridges 33b , by which the two abutment plate halves 31a . 31b interconnected, allows a limitation of the conical deformations of these two plate halves under the influence of the friction of the friction linings 37a . 37b at their respective friction paths conditioned temperature increase.

It should also be noted that the staggered arrangement of the coil springs 17 radially outside the friction tracks 3a . 39b a greater angular deflection of the guide discs 13 . 15 in relation to the damping disk 19 can be brought about, thereby filtering out the through the crankshaft 5 to the coupling unit 1 transmitted torsional vibrations is favored.

It should now be in the 2 and 3 illustrated embodiment are treated in which the same reference numbers are used for common or corresponding organs as in the context of the previous embodiment.

in the Following are only the differences of this embodiment described in comparison with the previous embodiment become.

In This embodiment comprises the damping means two damping units.

The first damping unit in turn comprises two first guide discs 13 . 15 on the flywheel 7 are fastened, with several first springs 17 are evenly distributed between these first guide discs.

A first damping disc 19 that with the first springs 17 interacts, is between the first two guide discs 13 . 15 arranged.

First friction agent 26 (so-called "hysteresis agents") are between the two guide discs 13 . 15 on the one hand and the first damping disc 19 on the other hand.

The first two guide discs 13 . 15 connect themselves in turn in an extension, the second damper disc 49 forms, which belongs to a second damping unit.

This second damping unit comprises except this damping disk 49 two second guide discs 51 . 53 , between which several second springs 55 are arranged with the damping disk 49 interact.

Between the two second guide discs 51 . 53 on the one hand and the second damping disc 49 On the other hand, second friction means 57 inserted.

It is advantageous to note that the first friction means 25 through the first two guide discs 13 . 15 from the two abutment plate halves 31a . 31b are separated and that the second friction means 57 through the two second guide discs 51 . 53 are separated from these two abutment plate halves.

In addition, it should be noted that in the two abutment plate halves openings 61a . 61b opposite the second coil springs 55 are incorporated.

It should be noted that in this second embodiment both the first springs 17 as well as the second springs 55 almost completely radially out of the friction paths 39a . 39b out, radially outward or radially within these Reibbahnen.

The Advantages of this second embodiment are immediate from the foregoing.

By providing two damping units, the angular deflections of each of these units can be added together to provide even more efficient filtering by the crankshaft 5 transmitted torsional vibrations results.

In this context, can 3 in which an example of the angular deflections that can be achieved with each damping unit is shown.

In this example, the damping unit allows with the first springs 17 an angular excursion of 18 degrees and 30 minutes for the first damping disc 19 in relation to the first two guide discs 13 . 15 while the second springs 55 an angular excursion of 22 degrees and 30 minutes for the two second guide discs 51 . 53 in relation to the second damping disc 49 allow for a total angular displacement of 31 degrees.

Provided that is provided, the two spring groups 17 and 55 almost completely radially outside of the friction paths 39a . 39b To arrange, there are similar advantages as in the previous embodiment in terms of the axial space requirements and the protection of these springs against strong temperature rises.

Because of the friction agent 25 and 57 between the first two guide discs 13 . 15 and the two second guide discs 51 . 53 are arranged, these friction agents can be used the strong temperature increases of the two abutment plate halves 31a . 31b to be protected.

By having openings in these two abutment plate halves 61a . 61b are provided, the springs can 55 be ventilated, whereby they are protected from the influence of strong temperature rises.

The Of course, the present invention is by no means limited to limited and described embodiments described, merely as examples for illustration and without limitation to be understood.

Summary

These Multiple clutch unit comprises two friction clutch discs, two abutment plate halves, two pressure plates, a flywheel and Damping means. These damping means include two guide discs, several between these two guide discs arranged springs, a damping disc between the these two guide discs is arranged and with the said Springs cooperates, and friction means between the guide discs and the damping disk are inserted. The feathers are at least almost completely radial from the friction paths the friction clutch discs on their respective abutment plate halves put out.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1361102 [0002]

Claims (13)

Multiple coupling unit ( 1 ), comprising: - at least a first and a second friction clutch disc ( 37a . 37b ), - at least one abutment plate with a first ( 31a ) and a second ( 31b ) Abutment plate half, - at least a first ( 41a ) and a second ( 41b ) Pressure plate, which the friction clutch discs ( 37a . 37b ) against the abutment plate halves ( 31a . 31b ), - a flywheel ( 7 ) for transmitting the engine torque to the coupling unit ( 1 ), - between the flywheel ( 7 ) and the abutment plate ( 31a . 31b ), said damping means comprising: - at least two guide discs ( 13 . 15 ; 51 . 53 ), - several springs arranged between these two guide disks ( 17 ; 55 ), - at least one damping disk ( 19 . 49 ), which is arranged between these two guide discs and cooperates with the springs, wherein the two abutment plate halves ( 31a . 31b ) on both sides of the damping disk ( 19 . 49 ), and - friction means inserted between the guide discs and the damper disc ( 25 ; 57 ), wherein said springs at least almost completely radially outside of the friction tracks ( 39a . 39b ) of the friction clutch discs ( 37a . 37b ) on their respective abutment plate halves ( 31a . 31b ) are offset. Coupling unit ( 1 ) according to claim 1, wherein the guide discs ( 13 . 15 ) fixed to the flywheel ( 7 ) and the damping disc ( 19 ) firmly with the two plate halves ( 31a . 31b ) connected is. Coupling unit ( 1 ) according to claim 2, in which the friction means ( 25 ) a spring washer ( 27 ) and a friction disc ( 29 ), this friction disc ( 29 ) by a ( 13 ) of the guide pulleys and on the damping disc ( 19 ) gets into friction. Coupling unit ( 1 ) according to claim 2 or 3, wherein at least one ( 13 ) of the guide discs ( 13 . 15 ) a significant portion of the damper disc ( 19 ), the friction means ( 25 ) are inserted between the radially inner parts of this guide disc and this damping disc. Coupling unit ( 1 ) according to claim 1 with a first damping unit, comprising: - at least two first guide discs ( 13 . 15 ), - a plurality of first springs arranged between these two first guide disks ( 17 ), - at least one first damping disk ( 19 ) between these two first guide discs ( 13 . 15 ) and with the first springs ( 17 ), and - between the first guide discs ( 13 . 15 ) and the first damping disc ( 19 ) inserted first friction agent ( 25 ), and with a second damping unit, comprising: - at least two second guide discs ( 51 . 53 ), - several between these two second guide discs ( 51 . 53 ) arranged second springs ( 55 ), - at least one second damping disk ( 49 ) between these two second guide discs ( 51 . 53 ) and with the second springs ( 55 ), and - between the second guide discs ( 51 . 53 ) and the damping disk ( 49 ) second friction agent ( 57 ). Coupling unit ( 1 ) according to one of the preceding claims, in which at least one ( 13 ) of the guide discs has a relatively high mass concentration at its periphery. Coupling unit ( 1 ) according to one of the preceding claims, in which the guide discs ( 13 . 15 ) closed recordings for said springs ( 17 ) define. Coupling unit ( 1 ) according to claim 7, wherein the seals ( 21 ) in the connection area between the guide discs ( 13 . 15 ) and the associated damping disc ( 19 ) are arranged. Coupling unit ( 1 ) according to one of the preceding claims, in which the friction means ( 25 . 57 ) through the guide discs ( 13 . 15 . 51 . 53 ) from the abutment plate halves ( 31a . 31b ) are separated. Coupling unit ( 1 ) according to one of the preceding claims, in which the plate halves ( 31a . 31b ) Cooling holes ( 35a . 35b ) and the friction agents ( 25 ) at least partially opposite these openings ( 61a . 61b ) are arranged. Coupling unit ( 1 ) according to one of the preceding claims, in which the plate halves ( 31a . 31b ) Cooling holes ( 61a . 61b ) and the springs ( 55 ) are arranged at least partially opposite these openings. Coupling unit ( 1 ) according to one of the preceding claims, in which the plate halves ( 31a . 31b ) by webs ( 33b ) are connected together to limit the conical deformation of these plate halves. Coupling unit ( 1 ) according to one of the preceding claims, in which the flywheel ( 7 ) is flexible.