DE102015200392A1 - Spring unit for a friction clutch - Google Patents

Abstract

The invention relates to a spring unit for a friction clutch, wherein the friction clutch comprises an axis of rotation, and wherein the spring unit comprises at least one of the following components: at least one biasable support spring for a plate spring, wherein the plate spring is adapted for pressing a pressure plate of a friction clutch; - At least one prestressable Anpressplattenfeder for connection to a pressure plate as an antagonist to a plate spring; and - at least one support element for axially supporting the support spring and the pressure plate spring against a cup spring force, wherein the at least one support spring and the at least one support element are integrally formed. With the spring unit proposed here a reduction of the individual components and at the same time a simple assembly is possible.

Description

The invention relates to a spring unit for a friction clutch, a friction clutch, in particular for a drive train in a motor vehicle.

Friction clutches are known from the prior art, which have at least one friction pack, with which a torque is releasably transferable. For this purpose, the at least one friction pack, comprising at least one pressure plate and at least one corresponding friction disc, is compressed and, as a result of the frictional force generated, a torque can be transmitted in the compressed state. The necessary contact pressure is generated in normally closed friction clutches via a spring system, which usually comprises at least one disc spring. Such a plate spring is constructed in the partial cross section on one side of a rotational axis of a friction clutch as a lever. In contrast to a pure lever occur in the plate spring (elastic) compressions and / or (elastic) strains in the circumferential direction, which are characteristic of the spring characteristic of the diaphragm spring. For the sake of simplicity, however, the plate spring is described here with reference to its partial cross section. This lever of the partial cross-section of the plate spring has an actuating portion, usually centrally of the friction clutch, a pressing portion, usually radially further outside, and a lever bearing about which the lever is tiltable. The lever support is usually carried out axially on two sides. That is, on one side of the lever is placed on an axially fixed component of the friction clutch, for example (directly or indirectly) on a clutch cover. This edition forms an axial abutment for the axially aligned contact force. On the other side, the lever rests on a support spring. The support spring forms during axial actuation, so when releasing the friction clutch, an axial abutment in the opposite direction to the axially fixed component. The support spring is directly or indirectly connected to a, preferably the same, axially fixed component of the friction clutch.

Currently, many different configurations of support springs are known. For example, support springs are known as wire rings or in cup spring form. These rest on flanges of bolts and / or hooks formed integrally with a clutch cover. Such support springs have a plurality of individual elements, which are manufactured separately and must be mounted as individual parts during assembly of the friction clutch.

On this basis, the present invention has the object of at least partially overcome the disadvantages known from the prior art. The features according to the invention emerge from the independent claims, to which advantageous embodiments are indicated in the dependent claims. The features of the claims may be combined in any technically meaningful manner, and to this end, the explanations of the following description and features of the figures may be used, which include additional embodiments of the invention.

• – zumindest eine vorspannbare Stützfeder für eine Tellerfeder, wobei die Tellerfeder zum Anpressen einer Anpressplatte einer Reibkupplung eingerichtet ist;
• – zumindest eine vorspannbare Anpressplattenfeder zum Verbinden mit einer Anpressplatte als Antagonist zu einer Tellerfeder; und
• – zumindest ein Abstützelement zum axialen Lagern der Stützfeder und der Anpressplattenfeder entgegen einer Tellerfederkraft, wobei die zumindest eine Stützfeder und das zumindest eine Abstützelement einstückig gebildet sind.

The invention relates to a spring unit for a friction clutch, wherein the friction clutch comprises an axis of rotation, and wherein the spring unit has at least one of the following components:

• - At least one prestressable support spring for a plate spring, wherein the plate spring is adapted for pressing a pressure plate of a friction clutch;
• - At least one prestressable Anpressplattenfeder for connection to a pressure plate as an antagonist to a plate spring; and
• - At least one support member for axially supporting the support spring and the Anpressplattenfeder against a cup spring force, wherein the at least one support spring and the at least one support element are integrally formed.

The spring unit comprises in one piece at least one support spring and its at least one axial fixing element, namely the support element. The at least one support element bridges the axial distance between an abutment point formed by the at least one support spring or an abutment line thus formed, and a suitable axially fixed component, preferably a clutch cover. Installed in a friction clutch, the support element thus preferably extends parallel to a rotational axis of the friction clutch. The support spring extends installed in a friction clutch transversely to the axis of rotation. In this case, the support spring installed in a friction clutch preferably has a (slight) inclination to a transverse plane towards a plate spring, this transverse plane being oriented orthogonally to the axis of rotation of the friction clutch. The inclination is preferably at least 5 ° [degrees] to a maximum of 20 °, preferably less than 15 °. Thus, a supporting force of the support spring in a plate spring can be introduced by a lever principle.

Basically, a conventional disc spring for the friction clutch is preferred. But it can also be used other spring systems, which are also based on a lever principle. Alternative examples are spring systems of a plurality of annularly arranged sections, which are installed separately or joined together. For most applications, an (axially) as flat as possible construction of the supported spring system is advantageous. In the following, therefore, a system with a disk spring will always be simplified.

In a preferred embodiment, the spring unit is formed as a continuous ring about a rotation axis, which is congruent with the rotational axis of a friction clutch when installed. Preferably, the support spring is annular, or a plurality of support springs extends from a common ring connecting the support spring and the support elements. In another embodiment, the spring unit is merely a part of such a ring and a plurality of spring units for a friction clutch are used so that they form a corresponding ring installed.

Furthermore, at least one pressure plate spring is provided. This extends when installed in a friction clutch preferably in the manner of a (conventional) leaf spring and preferably at least in a pressed state, axially inclined along a circumferential direction or inclined to a tangential plane of the rest of the spring unit, towards a pressure plate. The pressure plate spring is then inclined to a transverse plane, this transverse plane being oriented orthogonally to the axis of rotation of the friction clutch. The inclination is preferably at least 5 ° [degrees] to a maximum of 20 °, preferably less than 15 °.

The pressure plate spring is formed with a single spring position as a leaf spring or with multiple layers as a leaf spring stack. To generate a corresponding counterforce to the plate spring force on the pressure plate, the leaf spring (directly or indirectly) connected to the support member such that the leaf spring force of the plate spring force is axially opposite. In one embodiment, the pressure plate spring is formed separately and installed in a friction clutch connected to the support element, for example by means of a rivet.

In a preferred embodiment, the friction clutch can be mounted in an order that the friction package is first preassembled and (subsequently or in advance) the at least one spring unit connected, for example riveted, to the pressure plate by means of the pressure plate spring. Most preferably, the at least one support spring now forms a (closed) support ring, on the plate spring can be placed. Subsequently, the clutch cover can be placed and the at least one support spring, and optionally also the at least one Anpressplattenfeder, by means of connecting now performed, preferably with a clutch cover, the at least one support element tensioned. Thereafter, the friction pack is operable operable for releasable torque transfer.

In a further advantageous embodiment of the spring unit, the spring unit is integrally formed, preferably made of spring steel sheet.

In this preferred embodiment, the spring unit is formed completely in one piece, wherein it comprises the at least one support spring which comprises at least one pressure plate spring and the at least one support element. Thus, both the manufacture and the assembly of the spring unit are simplified. Particularly preferably, the spring unit is formed from a sheet and is formed here by punching and deep drawing. Most preferably, a spring steel sheet is selected for this purpose in order to permanently achieve a desired preload.

In a further advantageous embodiment of the spring unit, the at least one support element has a suspension flange, wherein the suspension flange can be suspended in a friction clutch.

The at least one support element has in this preferred embodiment, a suspension flange, by means of which the support element in an axially fixed component of the friction clutch (axially) can be suspended. Above all, such a suspension flange has a suspension surface, which is aligned counter to the support surface of the support spring, so that the suspension flange together with the axially fixed component of the friction clutch can form an abutment to the support spring force. Most preferably, the axially fixed component of the friction clutch is set up such that the suspension flange is axially insertable in a first position and by a relative rotation of the Einhängeflanschs to axially fixable component of the friction coupling Einhängeflansch with its bearing surface behind a corresponding receiving surface of the axially fixable component is feasible. Thus, a bayonet-type closure between the support element and the axially fixable component of the friction clutch, particularly preferably the clutch cover, can be formed.

In an assembly, the at least one spring unit is most preferably preassembled with the pressure plate by means of the pressure plate spring. Then, the plate spring is arranged between the at least one spring unit and the clutch cover still to be mounted. Subsequently, the clutch cover is axially guided over the at least one support element and rotated behind the associated Einhängeflansch so that now the at least one support element is braced like a bayonet with the clutch cover.

The necessary in this embodiment, relative rotational movement between the axially fixed component of the friction clutch and the at least one spring unit is in this case preferably aligned opposite to the direction of rotation of the friction clutch during operation. Alternatively or additionally, the at least one suspension lug on a snap-in connection with the axially fixed component of the friction clutch.

In a further advantageous embodiment of the spring unit, the at least one pressure plate spring has an outer contour with an outer radius and the at least one support spring has a bearing radius, wherein the outer radius is smaller than the bearing radius.

The outer contour refers to the distance between the center of rotation of a friction clutch and the radially outermost extent of the at least one Anpressplattenfeder when the spring unit is installed in a friction clutch. This distance then forms the outer radius of the outer contour. The at least one support spring forms a (closed) support ring or a plurality of support sections or support points, which have a bearing radius for a plate spring in the installed state. About this Auflageradius the diaphragm spring is tiltable. In this structure, the friction clutch on a reduced radial space, because the Anpressplattenfeder, unlike conventional leaf springs radially within a Reibpakets on a pressure plate are connectable. This advantage is achieved in particular in the case of a one-piece design of the (at least one) spring unit, because no additional (radial and / or axial) space is required for connecting the at least one pressure plate spring to the at least one support element.

• – zumindest ein Reibpaket mit zumindest einer Anpressplatte und mit zumindest einer korrespondierenden Reibscheibe, über welches im angepressten Zustand ein Drehmoment übertragbar ist;
• – zumindest eine Tellerfeder zum Verpressen des zumindest einen Reibpakets;
• – zumindest eine Federeinheit nach einer Ausführungsform gemäß der obigen Beschreibung zum Gegenlagern der zumindest einen Tellerfeder mittels der zumindest einen Stützfeder und zum antagonistischen Vorspannen der zumindest einen Anpressplatte mittels der zumindest einen Anpressplattenfeder;
• – einen Kupplungsdeckel zur Aufnahme und zum Gegenlagern der zumindest einen Federeinheit und zum Gegenlagern der zumindest einen Tellerfeder.

According to a further aspect of the invention, a friction clutch with an axis of rotation for detachably connecting an output shaft to a load is proposed, wherein the friction clutch has at least the following components:

• - At least one friction pack with at least one pressure plate and at least one corresponding friction disc, via which a torque can be transmitted in the pressed state;
• - At least one plate spring for pressing the at least one Reibpakets;
• - At least one spring unit according to an embodiment according to the above description for abutment of the at least one plate spring by means of at least one support spring and for antagonistic biasing the at least one pressure plate by means of the at least one Anpressplattenfeder;
• - A clutch cover for receiving and for abutment of the at least one spring unit and for abutment of the at least one plate spring.

The friction clutch is adapted to detachably transfer a torque from an output shaft to a load and vice versa. This is generally achieved by way of the at least one friction pack, which has an axially displaceable pressure plate which is rotationally fixed, as a rule, with the output shaft and which can be pressed against at least one corresponding friction disk. As a result of the contact force results in a frictional force over the friction surface, which multiplied by the average radius of the friction surface results in a transmissible torque.

Here is now proposed to use at least one spring unit according to an embodiment of the above description, which takes over the task of the support spring and the Anpressplattenfeder. Preferably, a single continuous spring unit is used for a (one-piece) plate spring. Alternatively, a plurality of spring units are used, which are preferably connected to each other, and which incorporated in the friction clutch form a (support) ring on which the at least one plate spring can be placed.

By means of the use of the here proposed (at least one) spring unit assembly is simplified and it is, in particular radial space can be saved. In addition, the manufacturing costs are significantly reduced compared to the prior art systems.

In a preferred embodiment of an assembly, the at least one spring unit is connected to a pressure plate, preferably riveted. The pressure plate is now installed or is already joined in the friction clutch with the other components to a friction package. Then the at least one plate spring is placed on the at least one spring unit. Then, the clutch cover is guided over the support elements and then the clutch cover and / or the pressure plate with the at least one spring unit rotated by a few degrees about the axis of rotation of the friction clutch. Here, the support elements with their suspension flange, preferably against the direction of rotation of the friction clutch in operation, axially fixedly connected to the clutch cover, so that now the support spring force and the Anpressplattenfederkraft are generated.

In a further advantageous embodiment of the friction clutch, the at least one disc spring can be centered by means of the at least one support element of the at least one spring unit.

In this preferred embodiment, the at least one disc spring is centered by means of the at least one support element, so that no further bolts, in particular hardened bolts, have to be provided for this purpose. In particular, in the choice of the material for the spring unit made of spring steel sheet that has at least one Supporting a sufficient hardness to withstand the disc spring forces or friction during operation. In addition, this makes a particularly simple and less error-prone mounting possible.

• – zumindest einen Befestigungsflansch beziehungsweise mehrere einzelne Befestigungsflansche für eine Gegenplatte und/oder ein Massenschwungrad;
• – zumindest einen zentralen Durchgang beziehungsweise eine Mehrzahl von Durchgängen für eine Betätigungseinrichtung zum Betätigen einer Tellerfeder;
• – zumindest eine Gegenlageeinrichtung, zum Beispiel ein Drahtring, eine Stützerhebung, eine Nachstelleinrichtung oder eine Mehrzahl von Nocken, für eine Tellerfeder,
• – zumindest eine Aufnahme für eine Federeinheit nach einer Ausführungsform gemäß der obigen Beschreibung.

According to a further aspect of the invention, a clutch cover for a friction clutch is proposed, wherein the friction clutch has an axis of rotation and wherein the clutch cover has at least the following components:

• - At least one mounting flange or a plurality of individual mounting flanges for a counter-plate and / or a flywheel mass;
• - At least one central passage or a plurality of passages for an actuator for actuating a plate spring;
• At least one abutment device, for example a wire ring, a support projection, an adjusting device or a plurality of cams, for a disc spring,
• - At least one receptacle for a spring unit according to an embodiment as described above.

The clutch cover forms an axially fixed component of the friction clutch, which is adapted to receive the cup spring forces and the Anpressplattenfederkräfte and the support spring forces. In general, the clutch cover is connected to a counter plate or a central web, thus forming with this a force clamp to the friction pack, which comprises a pressure plate and a corresponding friction disc. By the plate spring, the pressure plate is normal, ie in the non-actuated state, pressed against the friction disc, so that torque due to the frictional forces is transferable. For this purpose, the clutch cover preferably has through holes, which are designed to receive at least one suspension flange, so that the support element can be axially mounted in a bayonet manner by a relative rotation between the support element and the clutch cover. The clutch cover is hereby preferably designed as a sheet metal element, which is formed by sheet metal forming and / or deep drawing.

Particularly preferably, the clutch cover is substantially flat and has at most only elevations and / or extensions in the axial direction, which extend less than three times the sheet thickness, more preferably less than the simple sheet thickness, in the axial direction. Such a clutch cover is preferably connected to axially over the thickness of the Reibpakets extending flanges of a counter-plate, preferably screwed.

According to a further aspect of the invention, a drive train is proposed, which comprises a drive unit with an output shaft and a friction clutch according to the above description, wherein the output shaft for torque transmission by means of the friction clutch with at least one consumer is detachably connectable.

The drive train is set up to transfer a torque that is provided by a drive unit, for example an energy conversion machine, preferably an internal combustion engine or an electric motor, and output via its output shaft, for at least one consumer, ie switchable and switchable. An exemplary consumer is at least one drive wheel of a motor vehicle and / or an electric generator for the provision of electrical energy. To selectively transmit the torque and / or by means of a gearbox with different ratios or to separate a transmission, the use of the friction clutch described above is particularly advantageous because the structure of the friction clutch is simple and the production is inexpensive, while the required space is low ,

Conversely, a recording of an inertial energy introduced, for example, by a drive wheel can also be implemented. The at least one drive wheel then forms the drive unit, wherein its inertial energy by means of the friction clutch to an electric generator for recuperation, ie for the electrical storage of the braking energy, with a suitably equipped drive train is transferable. Furthermore, in a preferred embodiment, a plurality of drive units are provided, which are connected by means of the friction clutch in series or in parallel or decoupled from each other operable, or whose torque is releasably available for use available. Examples are hybrid drives of electric motor and internal combustion engine, but also multi-cylinder engines in which individual cylinders (groups) are switchable.

According to a further aspect of the invention, a motor vehicle is proposed, which has at least one drive wheel which can be driven by means of a drive train according to the above description.

Most motor vehicles today have a front-wheel drive and therefore preferably arrange the drive unit, for example an internal combustion engine or an electric motor, in front of the driver's cab and transversely to the main drive direction. The space is particularly small in such an arrangement and it is therefore particularly advantageous to a friction clutch of small size use. Similarly, the use of a friction clutch in motorized two-wheeled, for which a significantly increased performance is required with the same space.

This problem is exacerbated in passenger cars of the small car class according to European classification. The units used in a passenger car of the small car class are not significantly reduced compared to passenger cars larger car classes. Nevertheless, the available space for small cars is much smaller. The drive train described above has a friction clutch of particularly small size. At the same time, the assembly is less error-prone and cost-effective.

Passenger cars are assigned to a vehicle class according to, for example, size, price, weight and power, and this definition is subject to constant change according to the needs of the market. In the US market, cars of the class small cars and microcars are classified according to European classification of the class of Subcompact Car and in the British market they correspond to the class Supermini or the class City Car. Examples of the micro car class are a Volkswagen up! or a Renault Twingo. Examples of the small car class are an Alfa Romeo Mito, Volkswagen Polo, Ford Fiesta or Renault Clio.

The above-described invention will be explained in detail in the background of the relevant technical background with reference to the accompanying drawings, which show preferred embodiments. The invention is not limited by the purely schematic drawings in any way, it being noted that the drawings are not dimensionally accurate and are not suitable for the definition of size ratios. It is shown in

1 a spring unit with integrally formed pressure plate springs;

2 : a spring unit preassembled on a pressure plate;

3 : a friction clutch with spring unit;

4 : a friction clutch with spring unit in isometric view; and

5 : a powertrain in a motor vehicle.

In 1 is a spring unit 1 shown, which is formed here in one piece and as a closed ring. Here is the rotation axis 3 identical to the axis of rotation 3 in installation in a friction clutch 2 (see 3 ). The closed ring of the spring unit 1 is here by the support spring 4 formed, which also has a closed bearing ring with a Auflageradius 18 forms. On the support spring 4 are in this example a first support element 10 , a second support element 11 and a third support element 12 formed, which for axial attachment to a clutch cover 24 (see 3 ) are set up. For this purpose, the support elements 10 . 11 and 12 each a first Einhängeflansch 13 , a second suspension flange 14 or a third suspension flange 15 on. In this example also integral with the support spring 4 formed are a first pressure plate spring 7 , a second pressure plate spring 8th and a third pressure plate spring 9 , which in this example inward and along the axis of rotation 3 extend downwards in the illustration. The connecting elements (here with through-holes) of the pressure plate springs 7 . 8th and 9 for a pressure plate 6 (see 2 ) together form an outer contour 16 (dashed circle) with an outer radius 17 , The pressure plate springs 7 . 8th and 9 here extend concentrically to the outer bearing radius 18 to the common axis of rotation 3 , where the outer radius 17 smaller than the bearing radius 18 is. In such an embodiment, compared to a conventional friction clutch arrangement, in which the pressure plate springs (or leaf springs) are arranged on the clutch cover outside of the friction package, considerable radial space is obtained.

In 2 is a spring unit 1 , as in 1 shown, with these with a purely schematically illustrated pressure plate 6 is pre-assembled, by means of a here indicated only by the center line Anpressplattenniets 35 , After placing a plate spring 5 (see 3 ) is a clutch cover 24 (see 3 and 4 ) can be placed so that the support elements 10 . 11 and 12 through suspension openings 36 . 37 and 38 (see 4 ) are axially insertable, and by a relative rotation of the clutch cover 24 to the support elements 10 . 11 and 12 is the spring unit 1 in a friction clutch 2 by means of the suspension flanges 13 . 14 and 15 securable (compare 3 and 4 ).

In 3 is an assembled friction clutch 2 with a spring unit 1 shown for the sake of simplicity as in the preceding 1 and 2 is shown. In this sectional view is the friction package 22 , consisting of a pressure plate 6 and a friction disc 23 to recognize which between a plate spring 5 and a counter-plate 31 is compressed. Thus, a torque of, for example, the counter plate 31 and the clutch cover 24 by means of the pressure plate 6 on the friction disc 23 transferable, so that around the axis of rotation 3 the friction clutch 2 by means of an output shaft hub 32 the torque can be transmitted to an output shaft, not shown. Will the plate spring 5 operated, so pressed centrally in the drawing representation in this embodiment, the plate spring lifts 5 from the pressure plate cam 39 the pressure plate 6 off by the plate spring 5 through the cover bearing survey 34 the clutch cover 24 and the support spring 4 is rotatably mounted as a lever. By means of the pressure plate springs 7 . 8th and 9 of which only the first pressure plate spring 7 can be seen, then the pressure plate 6 from the friction disc 23 spaced and thus a torque transmission from the back plate 31 and the clutch cover 24 on the output shaft hub 32 interrupted. In this illustration, it is easy to see that the diaphragm spring 5 by means of the support elements 10 . 11 . 12 , of which only the third support element 12 is shown, is centered and during operation of the friction clutch 2 is radially feasible.

In 4 is a friction clutch 2 shown in the assembled state, which about an axis of rotation 3 is rotatable. Here are the counter plate 31 , with a starter ring gear 33 , as well as the clutch cover 24 shown which with a drive unit 26 (see 5 ) rotationally fixed and firm, so are not solvable in operation, torque transmitting connectable. This torque is releasable via the output shaft hub 32 For example, transferable to a rotationally fixed gear shaft (not shown). Central in the presentation are a plate spring 5 and a part of the friction disk 23 to recognize. The spring unit 1 is almost completely off the clutch cover 24 concealed in this representation, in which case the first Einhängeflansch 13 , the second suspension flange 14 and the third suspension flange 15 in the corresponding first suspension opening 36 , second hanging opening 37 or the third hanging opening 38 mounted and shown counter-stored. Furthermore, the clutch cover 24 a cover bearing survey 34 on, which is formed circumferentially. The clutch cover 24 So it is after the pre-assembly of the spring unit 1 like this in 2 is shown, and after placing the plate spring 5 on the support elements 10 . 11 and 12 axially feasible, and by twisting, here in a clockwise direction about the axis of rotation 3 , are the suspension flanges 13 . 14 and 15 in the respective suspension openings 36 . 37 and 38 axially mounted and secured with a bayonet-type closure.

In 5 is a powertrain 25 comprising a drive unit 26 , shown here as an internal combustion engine, an output shaft 19 , a friction clutch 2 and a torque transmitting connected left drive wheel 20 and right drive wheel 21 (here the (main) consumers), shown schematically. The powertrain 25 is here in a motor vehicle 27 arranged, wherein the drive unit 26 with its motor axis 30 transverse to the longitudinal axis 29 in front of the driver's cab 28 is arranged.

With the spring unit proposed here a reduction of the individual components and at the same time a simple assembly is possible.

LIST OF REFERENCE NUMBERS

1

 spring unit

2

 friction clutch

3

 axis of rotation

4

 support spring

5

 Belleville spring

6

 pressure plate

7

 first pressure plate spring

8th

 second pressure plate spring

9

 third pressure plate spring

10

 first support element

11

 second support element

12

 third support element

13

 first suspension flange

14

 second suspension flange

15

 third suspension flange

16

 outer contour

17

 outer radius

18

 edition radius

19

 output shaft

20

 left drive wheel

21

 right drive wheel

22

 Reibpaket

23

 friction

24

 clutch cover

25

 powertrain

26

 drive unit

27

 motor vehicle

28

 cab

29

 longitudinal axis

30

 motor axis

31

 counterplate

32

 Ausgangswellennabe

33

 Starter gear

34

 Cover support survey

35

 Anpressplattenniet

36

 first Einhängöffnung

37

 second Einhängöffnung

38

 third hanging opening

39

 Anpressplattennocke

Claims (8)

Spring unit ( 1 ) for a friction clutch ( 2 ), wherein the friction clutch ( 2 ) a rotation axis ( 3 ), and wherein the spring unit ( 1 ) has at least one of the following components: - at least one prestressable support spring ( 4 ) for a plate spring ( 5 ), wherein the plate spring ( 5 ) to the Pressing a pressure plate ( 6 ) a friction clutch ( 2 ) is set up; At least one prestressable pressure plate spring ( 7 . 8th . 9 ) for connection to a pressure plate ( 6 ) as an antagonist to a diaphragm spring ( 5 ); and - at least one support element ( 10 . 11 . 12 ) for axially supporting the support spring ( 4 ) and the pressure plate spring ( 7 . 8th . 9 ) against a cup spring force, wherein the at least one support spring ( 4 ) and the at least one support element ( 10 . 11 . 12 ) are integrally formed. Spring unit ( 1 ) according to claim 1, wherein the spring unit ( 1 ) in one piece, preferably made of spring steel sheet, is formed. Spring unit ( 1 ) according to claim 1 or 2, wherein the at least one support element ( 10 . 11 . 12 ) a suspension flange ( 13 . 14 . 15 ), wherein the suspension flange ( 13 . 14 . 15 ) in a friction clutch ( 2 ) can be suspended. Spring unit ( 1 ) according to one of the preceding claims, wherein the at least one pressure plate spring ( 7 . 8th . 9 ) an outer contour ( 16 ) with an outer radius ( 17 ) and wherein the at least one support spring ( 4 ) a bearing radius ( 18 ), wherein the outer radius ( 17 ) smaller than the bearing radius ( 18 ). Friction clutch ( 2 ) with a rotation axis ( 3 ) for releasably connecting an output shaft ( 19 ) with a consumer ( 20 . 21 ), comprising at least the following components: - at least one friction package ( 22 ) with at least one pressure plate ( 6 ) and with at least one corresponding friction disc ( 23 ), over which in the pressed state a torque is transferable; At least one disc spring ( 5 ) for pressing the at least one friction packet ( 22 ); At least one spring unit ( 1 ) according to one of claims 1 to 4 for abutment of the at least one plate spring ( 5 ) by means of at least one support spring ( 4 ) and for antagonistic pretensioning of the at least one pressure plate ( 6 ) by means of the at least one pressure plate spring ( 7 . 8th . 9 ); - a clutch cover ( 24 ) for receiving and for abutment of the at least one spring unit ( 1 ) and for abutment of the at least one plate spring ( 5 ). Friction clutch ( 2 ) according to claim 5, wherein the at least one plate spring ( 5 ) by means of the at least one support element ( 10 . 11 . 12 ) of the at least one spring unit ( 1 ) is centerable. Powertrain ( 25 ), comprising a drive unit ( 26 ) with an output shaft ( 19 ) and a friction clutch ( 2 ) according to claim 5 or 6, wherein the output shaft ( 19 ) for torque transmission by means of friction clutch ( 2 ) switchable with at least one consumer ( 20 . 21 ) is connectable. Motor vehicle ( 27 ) comprising at least one drive wheel ( 20 . 21 ), which by means of a drive train ( 25 ) is drivable according to claim 7.

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