DE102015224826B4 - Actuating system for opening and/or closing a clutch of a motor vehicle and method for assembling the actuating system - Google Patents

Abstract

Actuating system (1) for a friction clutch (2), comprising a slave cylinder (3) with an annular first actuating piston (4) for disengaging and/or engaging the friction clutch (2), an annular first actuating bearing (5) coupled to the first actuating piston (4) for displacing an actuating element (6) that can be rotated relative to the slave cylinder (3) in an axial direction (7) for actuating the friction clutch (2), wherein the first actuating bearing (5) has an annular bearing ring (9) that interacts with an end face (8) of the first actuating piston (4) and is connected to the first actuating piston (4) via a retaining ring (10), wherein the retaining ring (10) extends with an axial section (11) in the axial direction (7) into the first actuating piston (4), so that an overlap (12) between the first actuating piston (4) and the section arranged inside in a radial direction (13) (11) is formed, wherein a retaining ring (14) is arranged in the radial direction (13) within the section (11) in the region of the overlap (12), wherein the retaining ring (14) has a plurality of projections (16) extending outwards through openings (15) in the retaining ring (10) in the radial direction (13), which interact with at least one groove (17) in the first actuating piston (4), so that the first actuating piston (4) is arranged in a form-fitting manner on the end face (8) in the axial direction (7) between the bearing ring (9) and the plurality of projections (16).

Description

The present invention relates to an actuating system for opening and/or closing a clutch, in particular for coupling a drive shaft of a motor vehicle engine with at least one transmission input shaft of a motor vehicle transmission of a motor vehicle. The invention further relates to a method for assembling the actuating system. The actuating system can disengage and/or engage an actuating piston, in particular hydraulically or pneumatically, in order to actuate the clutch. The actuating system is preferably used to actuate a double clutch.

From the EN 10 2012 212 309 A1 a release system for actuating a double clutch is known, whereby at least one spiral spring is provided as a rotation lock for a stationary bearing ring of the engagement bearing, optionally via an additional mounting ring, and to support drag torques induced by the engagement bearing. The engagement bearing is connected to the actuating element via a rotating bearing ring and to the actuating piston via a non-rotating bearing ring. The non-rotating bearing ring is subjected to a drag torque, whereby the spiral spring prevents the non-rotating bearing ring from rotating relative to the slave cylinder. From the EN 10 2005 060 257 A1 A release system according to the preamble of claim 1 is known.

There is a constant need to design an actuation system for a friction clutch that is low-wear and easy to install.

Proceeding from this, the present invention is based on the object of at least partially solving the disadvantages known from the prior art and in particular of proposing an actuation system and a method that simplifies the assembly of an actuation system.

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

The invention relates to an actuation system for a friction clutch, comprising a slave cylinder with an annular (in particular designed to run all the way around in a circumferential direction; in particular circular, i.e. round; preferably polygonal) first actuation piston for disengaging and/or engaging the friction clutch, an annular first actuation bearing coupled to the first actuation piston for displacing an actuation element that can be rotated relative to the slave cylinder in an axial direction for actuating the friction clutch, wherein the first actuation bearing has an annular bearing ring that interacts with an end face of the first actuation piston and is (in particular) detachably connected to the first actuation piston via a retaining ring, wherein the retaining ring extends with an axial section in the axial direction into the first actuation piston, so that an overlap is formed between the first actuation piston and the section arranged on the inside in the radial direction, wherein a locking ring is arranged in a radial direction within the section in the area of the overlap, wherein the locking ring has a plurality of openings in the Retaining ring has projections extending outward in the radial direction, which cooperate with at least one groove in the first actuating piston, so that the first actuating piston is arranged in a form-fitting manner on the front side in the axial direction between the bearing ring and the plurality of projections.

The EN 10 2012 212 309 A1 is hereby fully referred to with regard to the description and arrangement of the spiral spring (to support drag torques induced via the actuating bearing and to protect against twisting).

An additional advantage of the actuation system is that the locking ring and the retaining ring enable compensation in the radial direction between the actuation bearing and the actuation piston, so that an offset of the rotation axes of the friction clutch and the actuation system can be compensated. This compensation in the radial direction is ensured by a play in the radial direction between the actuation piston and the retaining ring. At the same time, the actuation bearing is centered in relation to the actuation piston.

In particular, the ring-shaped retaining ring (e.g. circular, polygonal, etc.) extends in a circumferential direction between two ends and is elastically deformable. Elastically deformable here means in particular that an outer diameter of the retaining ring can be reduced by pressing the two ends together, whereby the retaining ring springs back to its original shape when the ends are relieved of pressure.

In particular, a spiral spring is provided to prevent the bearing ring from rotating and to support drag torques transmitted to the actuating system via the actuating element (cf. energy-storing element or spiral spring in EN 10 2012 212 309 A1 ), wherein the spring is arranged within the first actuating piston with a first spring end on the slave cylinder in a rotationally fixed manner and extends (spirally) along the portion of the retaining ring to a second spring end, wherein the second spring end bears against the locking ring in the axial direction and cooperates with a support of the locking ring in the circumferential direction.

This means that the spiral spring is arranged with both spring ends in a rotationally fixed manner on the one hand on the slave cylinder and on the other hand, via the locking ring, on the bearing ring of the actuating bearing. The spiral spring prevents the bearing ring from twisting relative to the slave cylinder. Twisting causes the diameter of the coils of the spiral spring to increase, as the spring ends of the spiral spring are moved towards each other in the circumferential direction. The coils of the spiral spring rest against the section of the retaining ring, preventing any further increase in diameter.

Preferably, the support is formed by one end of the retaining ring. In particular, one end of the retaining ring forms an extension extending in the axial direction.

In particular, the retaining ring is connected to the bearing ring in a form-fitting, force-fitting or material-fitting manner or is designed as a single piece with the bearing ring.

Positive-locking connections are created in particular by the interlocking of at least two connection partners. This means that the connection partners cannot come loose even without or when the power transmission is interrupted. In other words, in a positive-locking connection, one connection partner is in the way of the other.

Force-locking connections require a normal force on the surfaces to be connected. Their mutual displacement is prevented as long as the counterforce caused by static friction is not exceeded.

All connections in which the connecting partners are held together by atomic or molecular forces are called material-locking connections. At the same time, they are non-detachable connections that can only be separated by destroying the connecting elements.

1. a) Bereitstellen einer ersten Baugruppe bestehend aus dem ersten Betätigungslager mit dem Lagerring und dem Rückhaltering;
2. b) Bereitstellen einer zweiten Baugruppe bestehend zumindest aus dem Nehmerzylinder mit dem ersten Betätigungskolben;
3. c) Anordnen der ersten Baugruppe an der zweiten Baugruppe, so dass sich der Rückhaltering mit einem axialen Abschnitt in der axialen Richtung in den ersten Betätigungskolben hinein erstreckt und eine Überdeckung zwischen dem ersten Betätigungskolben und dem in der radialen Richtung innen angeordneten Abschnitt gebildet wird;
4. d) Bereitstellen eines Sicherungsrings, der sich in einer Umfangsrichtung zwischen zwei Enden erstreckt und elastisch verformbar ist;
5. e) Anordnen des Sicherungsrings in einer radialen Richtung innerhalb des Abschnitts und in der axialen Richtung im Bereich der Überdeckung, so dass sich die Mehrzahl von Vorsprüngen durch Öffnungen im Rückhaltering in der radialen Richtung nach außen erstrecken;
6. f) Anordnen des Sicherungsrings, so dass die Mehrzahl von Vorsprüngen mit der mindestens einen Nut im ersten Betätigungskolben zusammenwirkt, so dass der erste Betätigungskolben an der Stirnseite in der axialen Richtung zwischen dem Lagerring und der Mehrzahl von Vorsprüngen formschlüssig angeordnet ist.

The invention further relates to a method for assembling an actuation system according to the invention, comprising the following steps:

1. a) providing a first assembly consisting of the first actuating bearing with the bearing ring and the retaining ring;
2. b) providing a second assembly consisting of at least the slave cylinder with the first actuating piston;
3. c) arranging the first assembly on the second assembly such that the retaining ring extends with an axial portion in the axial direction into the first actuating piston and an overlap is formed between the first actuating piston and the portion arranged in the radial direction inward;
4. d) providing a retaining ring extending in a circumferential direction between two ends and being elastically deformable;
5. e) arranging the retaining ring in a radial direction within the section and in the axial direction in the region of the overlap so that the plurality of projections extend outwardly in the radial direction through openings in the retaining ring;
6. f) arranging the retaining ring so that the plurality of projections cooperate with the at least one groove in the first actuating piston, so that the first actuating piston is arranged in a form-fitting manner on the front side in the axial direction between the bearing ring and the plurality of projections.

Preferably, the second assembly additionally has a spiral spring which serves to prevent the bearing ring from rotating and to support drag torques transmitted to the actuating system via the actuating element, wherein the spring is arranged within the first actuating piston with a first spring end on the slave cylinder in a rotationally fixed manner and extends spirally to a second spring end; wherein during step c) at least the second spring end is arranged in the radial direction within the section of the retaining ring, wherein the second spring end after step f) rests against the locking ring in the axial direction and cooperates with a support of the locking ring in the circumferential direction.

In particular, the second spring end only comes into contact with the support of the retaining ring (successively) when the friction clutch is in operation.

In particular, steps d) and e) are carried out between steps b) and c). This means that the locking ring is first connected to the first assembly, e.g. during step a). The locking ring is therefore in particular already located in the section of the retaining ring, with the projections extending through the openings, so that the locking ring is fixed in the retaining ring in a rotationally fixed and axially fixed manner.

In particular, the first actuating piston (on the front side) has an insertion bevel, so that during step c) the insertion bevel interacts with the plurality of projections and the locking ring is elastically deformed. The elastic deformation means that the first assembly (with locking ring) can be arranged on the second assembly (along the axial direction), so that as soon as the projections are opposite the at least one groove, the locking ring elastically springs back and the projections engage in the groove. In this state, the first actuating piston is arranged in a form-fitting manner on the front side in the axial direction between the bearing ring and the plurality of projections.

For the assembly process, an assembly tool is used in particular, which is used to press the ends of the retaining ring together. In particular, the assembly tool can be arranged together with the first assembly on the second assembly. The assembly tool can be used to easily assemble the first assembly on the second assembly and also to easily disassemble it.

Furthermore, a friction clutch for coupling a drive shaft of a motor vehicle with at least one transmission input shaft is proposed, at least having an actuating element for opening and/or closing the friction clutch and an actuating system according to the invention or assembled according to the invention; wherein the friction clutch is a double clutch and the actuating system has a second actuating piston and a second actuating bearing, which are arranged coaxially and in the radial direction outside the first actuating piston.

The statements regarding the actuation system apply equally to the procedure and vice versa.

In particular, pressure can be applied hydraulically or pneumatically in the slave cylinder of the actuation system so that an actuation piston is disengaged against the spring force of an actuation element (e.g. a disc spring). The actuation piston can act on the actuation element via the actuation bearing. If the actuation element is designed as a disc spring, the actuation bearing can act on a radially inner end of the actuation element and pivot the actuation element about a pivot point running in the circumferential direction by changing the conicity of the actuation element. The pivoting movement of the actuation element allows the actuation element to axially displace a pressure plate of a friction clutch in order to frictionally press a clutch disc between the pressure plate and a counter plate of the friction clutch and thereby close the friction clutch and/or open the friction clutch. The actuating element can rotate at the speed of the pressure plate and the counter plate, so that the actuating element can apply a correspondingly high load to the actuating bearing, particularly when the friction clutch is closed. This can result in correspondingly high drag torques in the actuating bearing. As a result of the drag torque, the bearing ring and also the actuating piston that engages the bearing ring and is guided in the slave cylinder could rotate slightly, causing the actuating piston to wear out and the sealing effect of the actuating piston in the slave cylinder to deteriorate.

Here, the spiral spring acting on the slave cylinder is not connected to the actuating piston, but to the bearing ring, so that a drag torque acting on the bearing ring is carried by the spiral spring past the actuating piston directly to the slave cylinder. Unnecessary loads on the actuating piston, which can lead to unnecessary relative movements that cause wear, can thus be avoided.

In particular, the actuating piston can also perform a rotary movement in the slave cylinder independently of the bearing ring.

The flow of force when dissipating drag torques introduced into the actuating bearing can run from the bearing ring via the retaining ring, the locking ring and the support and via the spiral course of the spiral spring along the spiral longitudinal extension of a spring wire of the spring to the rotationally fixed mounting on the slave cylinder. The spiral spring can be subjected to torsion, with compressive forces in the longitudinal direction essentially predominating within the cross-section of the spring wire.

The slave cylinder can in particular have an annular closed cylinder chamber for receiving the actuating piston, which is essentially concentric to a rotation axis the clutch, so that the slave cylinder can be designed as a CSC ("concentric slave cylinder"). In particular, the actuation system is designed to actuate a double clutch and in particular has two nested piston-cylinder units in order to actuate a first clutch or a second clutch, as for example in EP 1 524 446 A1 described, the content of which is hereby also referred to as part of the invention.

The actuating bearing is designed in particular as a rolling bearing in which an outer ring is mounted via rolling elements, in particular bearing balls, in a manner that is relatively rotatable to an inner ring.

• 1: ein Betätigungssystem in einer Seitenansicht im Schnitt; Verfahren gemäß Schritt f);
• 2: einen Sicherungsring in einer perspektivischen Ansicht; Verfahrensschritt d);
• 3: eine erste Baugruppe in einer Seitenansicht im Schnitt; Verfahrensschritt a);
• 4: eine erste Baugruppe mit Sicherungsring in einer Seitenansicht im Schnitt; Verfahrensschritte a) und e);
• 5: eine zweite Baugruppe in einer Seitenansicht im Schnitt; Verfahrensschritt b);
• 6: das Betätigungssystem aus 1 in einer weiteren Seitenansicht im Schnitt; Verfahren gemäß Schritt f);
• 7: ein Kraftfahrzeug mit einer Reibkupplung und einem Betätigungssystem.

The invention and the technical environment are explained in more detail below with reference to the figures. The figures show particularly preferred embodiments, to which the invention is not limited, however. In particular, it should be noted that the figures and in particular the size relationships shown are only schematic. The same reference numerals denote the same objects. They show:

• 1 : an actuation system in a side view in section; method according to step f);
• 2 : a retaining ring in a perspective view; process step d);
• 3 : a first assembly in a side view in section; process step a);
• 4 : a first assembly with retaining ring in a side view in section; process steps a) and e);
• 5 : a second assembly in a side view in section; process step b);
• 6 : the operating system 1 in a further side view in section; process according to step f);
• 7 : a motor vehicle with a friction clutch and an actuation system.

1 shows an actuating system 1 in a side view in section and the method according to step f). The actuating system 1 comprises a slave cylinder 3 with an annular first actuating piston 4 for disengaging and/or engaging the friction clutch, an annular first actuating bearing 5 coupled to the first actuating piston 4 for displacing an actuating element 6 (disc spring, see 7 ) in an axial direction 7 for actuating the friction clutch, wherein the first actuating bearing 5 has an annular bearing ring 9 which interacts with an end face 8 of the first actuating piston 4 and is detachably connected to the first actuating piston 4 via a retaining ring 10, wherein the retaining ring 10 extends with an axial section 11 in the axial direction 7 into the first actuating piston 4, so that an overlap 12 is formed between the first actuating piston 4 and the section 11 arranged on the inside in the radial direction 13, wherein a locking ring 14 is arranged in a radial direction 13 within the section 11 in the region of the overlap 12, wherein the locking ring 14 has a plurality of projections 16 which extend outwards through openings 15 in the retaining ring 10 in the radial direction 13 and which engage with at least one groove 17 in the first actuating piston 4 cooperates so that the first actuating piston 4 is arranged in a form-fitting manner on the front side 8 in the axial direction 7 between the bearing ring 9 and the plurality of projections 16.

The EN 10 2012 212 309 A1 is hereby fully incorporated by reference with regard to the description and arrangement of the spring 21 (for supporting drag torques induced via the actuating bearing 5 and for securing against twisting).

Here, a spiral spring 21 is provided to prevent the bearing ring 9 from rotating and to support drag torques transmitted via the actuating element 6 into the actuating system 1 (cf. energy-storing element or spiral spring in EN 10 2012 212 309 A1 ), wherein the spring 21 is arranged within the first actuating piston 4 with a first spring end 22 on the slave cylinder 3 in a rotationally fixed manner and extends (spirally) along the section 11 of the retaining ring 10 to a second spring end (not shown here), wherein the second spring end rests against the locking ring 14 in the axial direction 7 and in the circumferential direction 18 with a support (see 2 and 6 ) of the retaining ring 14.

The spiral spring 21 is thus arranged with both spring ends 22, 23 in a rotationally fixed manner on the one hand on the slave cylinder 3 and on the other hand, via the locking ring 14, on the bearing ring 9 of the actuating bearing 5. A rotation of the bearing ring 9 relative to the slave cylinder 3 is thus prevented via the spring 21. A rotation causes the diameter of the coils of the spring 21 to increase, since the spring ends 22, 23 of the spring 21 are moved towards each other in the circumferential direction 18.

The coils of the spring 21 rest against the section 11 of the retaining ring 10, so that a further increase in the diameter is prevented.

Here, the retaining ring 10 is positively connected to the bearing ring 9.

2 shows a locking ring 14 in a perspective view; or process step d). The ring-shaped locking ring 14 (circular) extends in a circumferential direction 18 between two ends 19, 20 and is elastically deformable. Elastically deformable here means in particular that an outer diameter of the locking ring 14 can be reduced by compression (see double arrow in 2 ) which can be reduced to two ends 19, 20, the locking ring 14 springing back to its original shape when the ends 19, 20 are relieved of load. The locking ring 14 has a plurality of projections 16 extending outward in the radial direction 13.

Here, the support 24 is formed by an end 19, 20 of the retaining ring 14. Here, an end 19, 20 of the retaining ring 24 forms an extension extending in the axial direction 7 and thus the support 24.

3 shows a first assembly 25 in a side view in section; or process step a). The first assembly 25 (see also 1 ) consists of the first actuating bearing 5 with the bearing ring 9 and the retaining ring 10. Here, the retaining ring 10 is positively connected to the bearing ring 9 and extends further in the axial direction 7 over a section 11. In the section 11, a plurality of openings 15 are arranged through which the projections 16 of the locking ring 14 can extend.

4 shows a first assembly 25 (see also 3 ), now with locking ring 14, in a side view in section; or process steps a) and e). Here, the locking ring 14 is first connected to the first assembly 25, e.g. during step a). The locking ring 14 is therefore already located in section 11 of the retaining ring 10, with the projections 16 extending through the openings 15, so that the locking ring 14 is fixed in the retaining ring 10 in a rotationally fixed and axially fixed manner.

5 shows a second assembly 26 in a side view in section; or method step b). The second assembly comprises at least the slave cylinder 3 and the first actuating piston 4. Here, the slave cylinder 3 is intended for a double clutch and is designed as a CSC (concentric slave cylinder), i.e. it additionally comprises a second actuating bearing 32 and a second actuating piston 31. The actuating bearings 5, 32 and actuating pistons 4, 31 are all arranged coaxially to one another.

On the front side 8, the first actuating piston 4 has an insertion bevel 27, so that during step c) the insertion bevel 27 interacts with the plurality of projections 16 and the locking ring 14 is elastically deformed. In particular, however, a compression of the ends 20, 24 is additionally required in order to guide the projections 16 past the insertion bevel 27. The elastic deformation therefore at least supports the fact that the first assembly 25 (with locking ring 14) can be arranged on the second assembly 26 (along the axial direction 7), so that the locking ring 14, as soon as the projections 16 are opposite the at least one groove 17, springs back elastically and the projections 16 engage in the groove 17.

6 shows the actuation system 1 from 1 in a further side view in section; or the process according to step f). 1 is referred to. Here, the support 24 of the locking ring 14 is shown, with which the second spring end 23 interacts in the circumferential direction 18. Furthermore, the spring 21 rests against the locking ring 14 in the region of the second spring end 23 in the axial direction 7.

The spiral spring 21 is thus arranged with both spring ends 22, 23 in a rotationally fixed manner on the one hand on the slave cylinder 3 and on the other hand, via the locking ring 14, on the bearing ring 9 of the actuating bearing 5. A rotation of the bearing ring 9 relative to the slave cylinder 3 is thus prevented by the spring 21. A rotation causes the diameter of the coils of the spring 21 to increase, since the spring ends 22, 23 of the spring 21 are moved towards each other in the circumferential direction 18. The coils of the spring 21 rest against the section 11 of the retaining ring 10, so that a further increase in the diameter is prevented.

7 shows a motor vehicle 29 with a friction clutch 2 and an actuation system 1. The friction clutch 2 serves to couple a drive shaft 28 of a motor vehicle 29 with at least one transmission input shaft 30, at least having an actuation element 6 for opening and/or closing the friction clutch 2 and an actuation system 1 according to the invention or assembled according to the invention. The slave cylinder 3 is connected to a master cylinder 34 via a hydraulic pressure line. The master cylinder 34 is actuated via a clutch pedal 35.

List of reference symbols

1

Actuation system

2

Friction clutch

3

Slave cylinder

4

First actuating piston

5

First operating bearing

6

Actuator

7

Axial direction

8

Front side

9

Bearing ring

10

Retaining ring

11

Section

12

Coverage

13

Radial direction

14

Retaining ring

15

opening

16

projection

17

Groove

18

Circumferential direction

19

First end

20

Second End

21

Feather

22

first spring end

23

second spring end

24

Support

25

First assembly

26

Second assembly

27

Lead-in chamfer

28

Drive shaft

29

Motor vehicle

30

Gearbox input shaft

31

second actuating piston

32

second actuating bearing

33

Rotation axis

34

Master cylinder

35

Clutch pedal

36

Spring retaining ring

Claims (10)

Actuating system (1) for a friction clutch (2), comprising a slave cylinder (3) with an annular first actuating piston (4) for disengaging and/or engaging the friction clutch (2), an annular first actuating bearing (5) coupled to the first actuating piston (4) for displacing an actuating element (6) that can be rotated relative to the slave cylinder (3) in an axial direction (7) for actuating the friction clutch (2), wherein the first actuating bearing (5) has an annular bearing ring (9) that interacts with an end face (8) of the first actuating piston (4) and is connected to the first actuating piston (4) via a retaining ring (10), wherein the retaining ring (10) extends with an axial section (11) in the axial direction (7) into the first actuating piston (4), so that an overlap (12) between the first actuating piston (4) and the section arranged inside in a radial direction (13) (11) is formed, wherein a retaining ring (14) is arranged in the radial direction (13) within the section (11) in the region of the overlap (12), wherein the retaining ring (14) has a plurality of projections (16) extending outwards through openings (15) in the retaining ring (10) in the radial direction (13), which interact with at least one groove (17) in the first actuating piston (4), so that the first actuating piston (4) is arranged in a form-fitting manner on the end face (8) in the axial direction (7) between the bearing ring (9) and the plurality of projections (16). Actuation system (1) according to Claim 1 , wherein the retaining ring (14) extends in a circumferential direction (18) between two ends (19, 20) and is elastically deformable. Actuating system (1) according to one of the preceding claims, wherein a spiral spring (21) is provided to prevent rotation of the bearing ring (9) and to support drag torques transmitted via the actuating element (6) into the actuating system (1), wherein the spring (21) is arranged within the first actuating piston (4) with a first spring end (22) on the slave cylinder (3) in a rotationally fixed manner and extends along the section (11) of the retaining ring (10) to a second spring end (23), wherein the second spring end (23) rests against the locking ring (14) in the axial direction (7) and cooperates with a support (24) of the locking ring (14) in a circumferential direction (18). Actuating system (1) according to one of the preceding claims, wherein the support (24) is formed by one end (19, 20) of the retaining ring (14). Actuating system (1) according to one of the preceding claims, wherein the retaining ring (10) is connected to the bearing ring (9) in a form-fitting, force-fitting or material-fitting manner or is designed as one piece with the bearing ring (9). Method for assembling an actuation system (1) according to one of the preceding claims, comprising the following steps: a. Providing a first assembly (25) consisting of the first actuating bearing (5) with the bearing ring (9) and the retaining ring (10); b. Providing a second assembly (26) consisting of at least the slave cylinder (3) with the first actuating piston (4); c. Arranging the first assembly (25) on the second assembly (26) so that the retaining ring (10) extends with an axial section (11) in the axial direction (7) into the first actuating piston (4) and an overlap (12) is formed between the first actuating piston (4) and the section (11) arranged on the inside in the radial direction (13); d. Providing a locking ring (14) which extends in a circumferential direction (18) between two ends (19, 20) and is elastically deformable; e. Arranging the locking ring (14) in a radial direction (13) within the section (11) and in the axial direction (7) in the region of the overlap (12) so that the plurality of projections (16) extend outwards through openings (15) in the retaining ring (10) in the radial direction (13). f. Arranging the locking ring (14) so that the plurality of projections (16) interact with the at least one groove (17) in the first actuating piston (4), so that the first actuating piston (4) is arranged in a form-fitting manner on the end face (8) in the axial direction (7) between the bearing ring (9) and the plurality of projections (16). Procedure according to Claim 6 , wherein the second assembly (26) additionally has a spiral spring (21) for securing the bearing ring (9) against rotation and for supporting drag torques transmitted via the actuating element (6) into the actuating system (1), wherein the spring (21) is arranged within the first actuating piston (4) with a first spring end (22) on the slave cylinder (3) in a rotationally fixed manner and extends spirally to a second spring end (23); wherein during step c. at least the second spring end (23) is arranged in the radial direction (13) within the section (11) of the retaining ring (10), wherein the second spring end (23) after step f. rests against the locking ring (14) in the axial direction (7) and cooperates in the circumferential direction (18) with a support (24) of the locking ring (14). Procedure according to Claim 6 and 7 , wherein steps d. and e. are performed between steps b. and c. Procedure according to Claim 8 , wherein the first actuating piston (4) has an insertion chamfer (27) so that during step c. the insertion chamfer (27) cooperates with the plurality of projections (16) and the locking ring (14) is elastically deformed. Friction clutch (2) for coupling a drive shaft (28) of a motor vehicle (29) with at least one transmission input shaft (30), at least comprising an actuating element (6) for opening and/or closing the friction clutch (2) and an actuating system (1) according to one of the Claims 1 until 5 or manufactured according to one of the Claims 6 until 9 ; wherein the friction clutch (2) is a double clutch and the actuating system (1) has a second actuating piston (31) and a second actuating bearing (32) which are arranged coaxially and in the radial direction (13) outside the first actuating piston (4).

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