DE102013224475A1 - Carrier element for pressure chamber of friction clutch e.g. wet-dual clutch, of passenger car, has stopper element for operating element of pressure chamber, where carrier element is designed as single-piece and made from metal sheet - Google Patents

Abstract

The element (1) has a retaining element (4) for a sealing unit (5), and a stopper element (6) for an operating element (7) of a pressure chamber (3), where the carrier element is designed as a single-piece and made from metal sheet. The stopper element is designed as a projection (10) that projects in a disengaging direction of the operating element when the carrier element is installed in a friction clutch. The sealing unit is designed as an axial sliding element, and seals the pressure chamber in an axially movable manner. An independent claim is also included for a friction clutch.

Description

The invention relates to a carrier element for a pressure chamber of a friction clutch, in particular a friction clutch for a motor vehicle.

Various friction clutches are known from the prior art, which are hydraulically actuated. For this purpose, pistons are provided in the friction clutch, which are movable back and forth by means of a pressure chamber. By means of the fluid pressure in the pressure chamber, the piston is usually moved in the direction of engagement. By means of a spring element, the piston is moved back in the release direction with decreasing fluid pressure in the pressure chamber. The direction indication does not have to be identical to the engagement and disengagement of the friction elements of the friction clutch, but is generally reversed. For the return movement, an end stop is provided which limits the minimum position of the stroke movement of the piston. In a high-performance friction clutch, an increasing number of components have to be provided which have to fulfill different functions in a friction clutch. As a result, the structure of such a friction clutch is very complex. Thus, the production of such a friction clutch is associated with many individual steps, whereby the production is complicated and expensive.

On this basis, the present invention has the object, at least partially overcome the known from the prior art disadvantages. The object is solved by the features of the independent claims. Advantageous developments are the subject of the dependent claims.

The invention relates to a carrier element for a pressure chamber of a friction clutch, which has at least one receiving element for a sealing means and a stop element for an actuating element of a pressure chamber. The carrier element is characterized in that the carrier element is integrally formed.

The support element proposed here is adapted to be arranged in a pressure chamber of a friction clutch. For this purpose, the carrier element has a receiving element for a sealing means, which can seal at least a portion within the pressure chamber. Furthermore, the carrier element has a stop element, on which the piston of the pressure chamber is spaced at the minimum stop from the opposite pressure chamber wall. The support element proposed here is integrally formed, and thus integrates the functions of sealing and the spacing of the piston in the minimum engaged state.

According to a further advantageous embodiment of the carrier element, the carrier element is formed from a sheet metal.

By using a sheet for the production of the support element, this is particularly simple and inexpensive to produce and beyond the shape of various geometries of friction clutches is easy and inexpensive customizable. Furthermore, such a sheet metal element has a particularly low weight. In addition, by reducing the components, namely by integrating the above functions, the weight of the friction clutch is reduced.

According to a further advantageous embodiment of the carrier element, the sealing means is firmly connected to the at least one receiving element by clipping or spraying with the carrier element.

The sealing means is preferably an elastomer, which must be connected by another component with the carrier element. By appropriate design of the receiving element, such a sealant can be firmly connected by clipping or spraying, so that such a further component can be saved. In particular, the sealant is positioned and secured both axially and rotationally by the design of the receiving element.

According to a further advantageous embodiment of the carrier element, the carrier element forms a further stop, by means of which, when installed in a friction clutch, the at least one stop element is supported against a component of the friction clutch.

By forming a further stop, the carrier element can be stabilized; that is, it can be made thinner than previously conventional stops for an actuator of the pressure chamber. Particularly preferably, the further stop makes contact with the actuating element itself, so that the carrier element is firmly aligned with this in every position of the actuating element.

According to a further advantageous embodiment of the carrier element, the stop element is designed as a bulge, which bulge protrudes in the installation of the carrier element in a friction clutch in the disengagement of the piston.

The design of the stop element as a bulge, the stop element is particularly stable, whereby the support member can be made very thin overall. The bulge may be a (2-dimensional) wave or a (3-dimensional) wave. Dimensional) recess can be formed, which reaches by its shape a special rigidity in - installed in the friction clutch - axial direction. The bulge is aligned in the release direction of the piston, so that the spring force that resets the piston, can be absorbed in the most stable force direction in the bulge. Such a bulge is particularly easy to manufacture and can be introduced during the production of the support member made of sheet metal during the punching process.

According to a further advantageous embodiment of the support member, the support member is adapted to seal in an installation in a friction clutch, the pressure chamber of the actuating element of the friction clutch axially movable.

By this advantageous embodiment, it is possible with the support member, the piston axially displaceable, for example, on the rotor of the friction clutch to store and seal at the same time. As a result, the carrier element can be firmly positioned with the actuating element, seal the actuating element and at the same time position the end stop securely for the piston.

According to a further advantageous embodiment of the carrier element, the carrier element is adapted to be attached to an actuating element of the friction clutch.

In this very particularly preferred embodiment of the carrier element, the carrier element is attached to an actuating element of the friction clutch, for example the piston of the friction clutch. This ensures that the end stop is always arranged correctly to the actuating element and thus ensures a reliable function of the friction clutch.

• – zumindest ein Reibpaket mit zumindest einer Anpressplatte und zumindest einer korrespondierenden Reibscheibe, über die im angepressten Zustand ein Drehmoment übertragbar ist;
• – zumindest eine hydraulische Betätigungseinrichtung mit einer Druckkammer und einem Kolben zum Betätigen des zumindest einen Reibpakets; und
• – zumindest ein Trägerelement gemäß der obigen Beschreibung zum Einbau in der Druckkammer der zumindest einen hydraulischen Betätigungseinrichtung.

According to a further aspect of the invention, a friction clutch for releasably connecting an output shaft to a drive train is proposed, which 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 hydraulic actuator with a pressure chamber and a piston for actuating the at least one Reibpakets; and
• - At least one support member according to the above description for installation in the pressure chamber of the at least one hydraulic actuator.

The output shaft is usually a shaft which is intended to transfer a torque from a drive unit, for example an internal combustion engine or an electric motor, detachably to a drive train, for example a motor vehicle. For this purpose, the friction clutch is interposed, in which at least one friction pack can transmit torque by means of at least one pressure plate and at least one corresponding friction disk as a result of the frictional force between the pressure plate and the friction disk in the pressed-on state. If the pressure plate and the corresponding friction disc are released from each other, no torque or only a small torque is transmitted.

By means of the actuator, the friction pack is separated from each other when the friction clutch is normally closed, that is engaged, or the friction pack is compressed when the friction clutch is normally open, that is disengaged. The actuating device is composed of an actuating element and an associated pressure chamber, wherein the actuating element is movable by fluid pressure in the direction of engagement. In the return movement, the actuating element is often moved by a spring element with decreasing fluid pressure. The spring element may be an additional component or the Gegenaktor the Reibpakets.

Preferably, the actuating element has a receptacle for engagement with a return spring axially against the stiffened region on the stop element. This receptacle is particularly preferably formed integrally with the actuating element.

The second clutch assembly, which comprises the second friction pack, particularly preferably has a second actuating element, which is accommodated via a sealing element axially displaceably on a support element. In this case, the second actuating element forms part of a second pressure chamber for acting on a fluid pressure for actuating the second actuating element.

According to a further advantageous embodiment of the friction clutch, this is a double clutch, which is designed in particular wet.

A dual clutch comprises two friction packs, which are shifted in relation to one another or intersected, that is to say engaged. As a result, a complete power transmission is possible. However, such double clutches are very complex and therefore it is advantageous to use the carrier element described above and thus to reduce the number of components and to reduce the overall cost.

Most preferably, the friction clutch is wet, that is, the at least one friction pack is located in a bath of coolant. In this case, different liquid chambers must be separated from each other, for which the carrier element is particularly suitable.

According to a further aspect of the invention, a motor vehicle is proposed, which has a drive unit with an output shaft, a drive train and a friction clutch according to the above description for releasably connecting the output shaft to the drive train.

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 use a friction clutch small size.

The installation space situation for passenger cars of the small car class according to European classification is exacerbated. 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 support element described above reduces the number of parts, allows a reduction of the required space for an actuator and is particularly inexpensive to produce. Therefore, a friction clutch with this support element is particularly suitable for small and low-priced vehicles. Passenger cars are classified according to vehicle class according to, for example, size, price, weight, power, but this definition is subject to constant change according to the needs of the market. In the US market, vehicles 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, for example, the class City Car. Examples of the micro car class are a Volkswagen Fox or a Renault Twingo. Examples of the small car class are an Alfa Romeo Mito, Volkswagen Polo, Ford Fiesta or Renault Clio.

The features listed individually in the claims can be combined with one another in any technologically meaningful manner and can be supplemented by explanatory facts from the description and details from the figures, wherein further embodiments of the invention are shown.

The invention and the technical environment will be explained in more detail with reference to FIGS. The figures show particularly preferred embodiments, to which the invention is not limited. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. Show it:

1 a friction clutch,

2 : a friction clutch with carrier element and

3 : a motor vehicle with friction clutch.

1 shows a carrier element 1 which is in a pressure chamber 3 a friction clutch 2 (not shown here) is arranged. The carrier element 1 has a stop element 6 on, as a bulge 10 is executed and another stop 8th having. The actuator 7 the friction clutch 2 is in minimal stop position in the pressure chamber 3 arranged so that the bulge 10 the stop element 6 at the component 9 is present, which component 9 Here is a wall of the pressure chamber. The receiving element 4 has a sealant 5 on, which is designed here as an axial sliding element and the pressure chamber 3 seals axially movable. About the receiving element 4 or indirectly via the sealant 5 is the carrier element 1 with the actuating element 7 connected.

In 2 is a friction clutch 2 shown the first friction package 13 and a second friction package 14 comprises, which in each case at least one first pressure plate 15 and second pressure plate 16 includes. The pressure plates 15 and 16 can with the at least one corresponding first friction disc 17 or second friction disc 18 be pressed, so that torque from the output shaft 11 on the first output shaft 26 or second output shaft 27 can be transferred. The first rubbing package 13 is via the actuator 19 operated by the return spring 25 against the pressure force in the pressure chamber 3 is moved back and forth. The actuator 7 is a component of the actuator 19 ,

In 3 is a motor vehicle 20 with a drive unit 21 shown with its motor axis 24 transverse to the longitudinal axis 23 and in front of the driver's cab 22 of the motor vehicle 20 is arranged. The output shaft 11 the drive unit 21 is with a friction clutch 2 connected to the purely schematically illustrated drive train 12 detachable with the drive unit 21 combines.

With the support element proposed here, a plurality of components can be replaced by a very lightweight and simply constructed carrier element, as described above.

LIST OF REFERENCE NUMBERS

1

 support element

2

 friction clutch

3

 pressure chamber

4

 receiving element

5

 sealant

6

 stop element

7

 actuator

8th

 attack

9

 component

10

 bulge

11

 output shaft

12

 powertrain

13

 first friction package

14

 second friction package

15

 first pressure plate

16

 second pressure plate

17

 first friction disc

18

 second friction disc

19

 actuator

20

 motor vehicle

21

 drive unit

22

 cab

23

 longitudinal axis

24

 motor axis

25

 Return spring

26

 first output shaft

27

 second output shaft

Claims (10)

Carrier element ( 1 ) for a pressure chamber ( 3 ) a friction clutch ( 2 ), comprising at least one receiving element ( 4 ) for a sealant ( 5 ) and a stop element ( 6 ) for an actuating element ( 7 ) a pressure chamber ( 3 ), characterized in that the carrier element ( 1 ) is integrally formed. Carrier element ( 1 ) according to claim 1, wherein the carrier element ( 1 ) is formed from a metal sheet. Carrier element ( 1 ) according to claim 1 or 2, wherein the sealant ( 5 ) on the at least one receiving element ( 4 ) by clipping or spraying with the carrier element ( 1 ) is firmly connected. Carrier element ( 1 ) according to one of the preceding claims, wherein the carrier element ( 1 ) another stop ( 8th ), by means of which, when installed in a friction clutch ( 2 ) the at least one stop element ( 6 ) against a component ( 9 ) of the friction clutch ( 2 ) is supported. Carrier element ( 1 ) according to one of the preceding claims, wherein the stop element ( 6 ) as a bulge ( 10 ), which bulge ( 10 ) in the installation of the carrier element ( 1 ) in a friction clutch ( 2 ) in the release direction of the actuating element ( 7 protruding). Carrier element ( 1 ) according to one of the preceding claims, wherein the carrier element ( 1 ) is adapted to be installed in a friction clutch ( 2 ) the pressure chamber ( 3 ) of the actuating element ( 7 ) of the friction clutch ( 2 ) axially movable seal. Carrier element ( 1 ) according to one of the preceding claims, wherein the carrier element ( 1 ) is adapted to an actuating element ( 7 ) of the friction clutch ( 2 ) to be attached. Friction clutch ( 2 ) for releasably connecting an output shaft ( 11 ) with a drive train ( 12 ), comprising at least the following components: - at least one friction package ( 13 . 14 ) with at least one pressure plate ( 15 . 16 ) and at least one corresponding friction disc ( 17 . 18 ), over which in the pressed state a torque is transferable; At least one hydraulic actuator ( 19 ) with a pressure chamber ( 3 ) and an actuating element ( 7 ) for actuating the at least one friction packet ( 13 ); and - at least one carrier element ( 1 ) according to one of the preceding claims for installation in the pressure chamber ( 3 ) of the at least one hydraulic actuator ( 19 ). Friction clutch ( 2 ) according to claim 8, wherein the friction clutch ( 2 ) is a double clutch, which is designed in particular wet. Motor vehicle ( 20 ) comprising a drive unit ( 21 ) with an output shaft ( 11 ), a powertrain ( 12 ) and a friction clutch ( 2 ) according to claim 8 or 9.

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