WO2015131893A1 - Method for assembling an actuating system for opening and/or closing a clutch of a motor vehicle - Google Patents

Abstract

The invention relates to a method for assembling an actuating system for opening and/or closing a clutch; in particular for coupling a drive shaft of a motor vehicle engine to at least one transmission input shaft of a motor vehicle transmission, wherein the actuating system has a slave cylinder for disengaging and/or engaging an actuating piston actuating the clutch, and an actuating bearing, which is coupled to the actuating piston, for shifting an actuating element, which is rotatable relative to the slave cylinder, for actuating the clutch, and a spiral spring which engages on a bearing ring of the actuating bearing, which bearing ring is assigned to the actuating piston, and on the slave cylinder in order to dissipate drag torques which are transmitted from the bearing ring to the slave cylinder, comprising at least the following steps: a) supplying a first assembly consisting of the bearing ring and the spiral spring, which has a first end and a second end, wherein the bearing ring is connected to the first end for rotation therewith; b) supplying a second assembly at least comprising the slave cylinder with a clutch-side first end side and a transmission-side second end side, wherein the slave cylinder has a receptacle on an outer circumferential surface for the second end; c) arranging the bearing ring on the first end side; d) bending up the second end of the spiral spring towards the second end side; e) rotating bearing ring and slave cylinder with respect to each other such that the second end is moved in a circumferential direction on the receptacle and the receptacle is arranged in an axial direction between second end and first end side; f) relieving the second end of load; g) rotating back the bearing ring in relation to the slave cylinder until the second end latches into the receptacle.

Description

 Method for assembling an actuation system for opening and / or closing a clutch of a motor vehicle

The present invention relates to a method for assembling 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. In particular hydraulically or pneumatically, an actuating piston can be disengaged and / or engaged by the actuating system in order to actuate the clutch.

From DE 10 2013 213 384 A1, an actuating system for a friction clutch of a motor vehicle is known in which a slave cylinder which can be acted upon by a pressure is provided for disengaging an actuating piston. With the slave cylinder and the actuating piston, a spiral spring is connected to move the actuating piston in a defined starting position. With the actuating piston an actuating bearing is connected, which engages a co-rotating, configured as a plate spring actuator for actuating the friction clutch.

Furthermore, from DE 10 2012 212 309 A1 a release system for actuating a clutch is known, being provided as rotation of a stationary bearing ring of the engagement bearing, optionally via an additional mounting ring, and for supporting induced via the engagement bearing drag moments at least one coil spring.

There is a constant need to design an actuating system for a friction clutch wear and easy to install.

On this basis, the present invention has the object, at least partially to solve the disadvantages known from the prior art and in particular to propose a method that simplifies the installation of an actuating system.

The object is solved by the features of independent claim 1. Advantageous developments are the subject of the dependent claims.

The invention relates to a method for assembling an actuating system for opening and / or closing a clutch; in particular for coupling a drive shaft of a Motor vehicle engine having at least one transmission input shaft of a motor vehicle transmission, wherein the actuating system comprises a slave cylinder for disengaging and / or engaging a clutch actuated actuating piston, and coupled to the actuating piston actuator bearing for displacing a relative to the slave cylinder rotatable actuator for actuating the clutch and a coil spring which engages on a bearing ring of the actuating bearing associated with the actuating piston and on the slave cylinder for the removal of drag torques which are transmitted from the bearing ring to the slave cylinder, comprising at least the following steps:

 a) providing a first assembly consisting of the bearing ring and the coil spring having a first end and a second end, wherein the bearing ring is rotatably connected to the first end;

 b) providing a second assembly comprising at least the slave cylinder with a clutch-side first end face and a transmission-side second end face, wherein the slave cylinder on an outer peripheral surface has a receptacle for the second end;

 c) arranging the bearing ring on the first end face;

 d) bending the second end of the spiral spring towards the second end face;

 e) rotation of the bearing ring and the slave cylinder to each other, so that the second end is advanced in a circumferential direction of the receptacle and the receptacle is arranged in an axial direction between the second end and the first end face;

 f) relieving the second end;

 g) Turning the bearing ring back against the slave cylinder until the second end snaps into place.

In particular, the bearing ring here is a mounting ring which cooperates in the installed state of the slave cylinder with a bearing inner ring of the actuating bearing. The coil spring is then connected via the first end to the mounting ring. The mounting ring thus forms a pre-assembly unit with the slave cylinder and acts as a transport lock for the slave cylinder with actuating piston arranged therein.

In particular, a 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 (eg, a diaphragm spring). The actuating piston can act on the actuator via the actuating bearing. Is the actuating element designed as a plate spring, the actuating bearing can engage a radially inner end of the actuating element and the actuating element by a change of Tilt conicity of the actuating element about a pivot point extending in the circumferential direction. As a result of the pivoting movement of the actuating element, the actuating element can axially displace a pressure plate of a friction clutch to frictionally press a clutch disk between the pressure plate and a counterplate of the friction clutch and thereby close the friction clutch and / or open the friction clutch. The actuating element can co-rotate with the speed of the pressure plate and the counter plate, so that the actuating element, in particular when closing the friction clutch, can act on the actuating bearing with a correspondingly high load. As a result, correspondingly high drag torques can occur in the actuating bearing. As a result of Schleppmoments the bearing ring and also acting on the bearing ring and guided in the slave cylinder actuating piston could rotate a little, whereby the actuating piston wear out and could subside the sealing effect of the actuating piston in the slave cylinder. Here, the force acting on the slave cylinder coil spring is not connected to the actuating piston, but with the bearing ring, so that acting on the bearing ring drag torque is removed via the coil spring on the actuating piston past directly on the slave cylinder. Unnecessary loads of the actuating piston, which can lead to a tilting of the actuating piston in the slave cylinder or unnecessary wear-related relative movements, can be avoided.

In particular, the actuating piston can also perform a rotational movement in the slave cylinder independently of the bearing ring. In this context, reference is also made to the still unpublished DE 10 2014 203 966 of the applicant, which is hereby incorporated by reference in its entirety. Therein, an actuating system is proposed in which drag torques are reduced by means of a spiral spring. The coil spring is connected to a bearing ring and the slave cylinder. The power flow in the removal of drag torque introduced into the actuating bearing can extend from the first bearing ring via the spiral course of the spiral spring along the spiral longitudinal extent of a spring wire of the spiral spring to the stop surface on the receptacle. In this case, the spiral spring can be subjected to torsion, wherein essentially compressive forces in the longitudinal direction prevail within the cross section of the spring wire. In particular, the actuating piston can be retained in the slave cylinder in a captive manner by the actuating bearing connected to the slave cylinder via the spiral spring. As a result, the spiral spring can fulfill not only the function of removing drag torques of the actuating bearing but also the function of a transport safety device. By abutting the coil spring with its second end to the stop surface of the receptacle on the slave cylinder, drag torques introduced via the actuating bearing can be removed past the actuating piston.

The slave cylinder may, in particular, have an annularly closed cylinder chamber for receiving the actuating piston, which is arranged substantially concentrically with respect to a rotational axis of the clutch so that the slave cylinder can be designed as a CSC ("concentric slave cylinder") Dual clutch configured and in particular has two nested piston-cylinder units to actuate a first clutch or a second clutch, as described for example in EP 1 524 446 A1, the content of which is hereby incorporated by reference as part of the invention.

The actuating bearing is designed in particular as a rolling bearing, in which an outer ring via rolling elements, in particular bearing balls, is rotatably supported relative to an inner ring.

In particular, the coil spring is frictionally secured, for example by a clamping connection, to the bearing ring. Possibly. can the coil spring (additionally) form-fitting, z. B. by forming an undercut with the bearing ring to be connected to the bearing ring.

In particular, at least one support region is arranged on the outer circumferential surface, on which the spiral spring is supported in the axial direction.

Preferably, the at least one support region relative to the receptacle is arranged substantially on an opposite side of the slave cylinder. But there are also other positions on the slave cylinder possible.

In particular, the at least one support area prevents tilting of the bearing ring on the first end face.

In particular, the second end extends outward in a radial direction. However, it is also possible that the second end extends inward in the radial direction. Preferably, the receptacle has a pin which extends at a distance from the outer peripheral surface along the axial direction, so that the spiral spring can be arranged with the second end between the outer circumferential surface and the pin

In particular, the receptacle in the circumferential direction on a stop surface, so that the second end between pin and stop surface can be arranged.

In particular, at least steps d) to g) are automated. Automated means that the steps of the procedure are performed exclusively by machines (and in particular without human control). In particular, it is possible to perform fixed movements here, without the movements being monitored by sensors and / or influenced by sensor signals. In particular, steps c) to g) and preferably steps a) to g) are automated.

In particular, the spiral spring is a tension spring. Tension spring means that the spiral spring is loaded to train. It is further proposed a coupling for coupling a drive shaft of an automotive engine with at least one transmission input shaft of a motor vehicle transmission. The clutch is a friction clutch for frictional coupling of the drive shaft with the at least one transmission input shaft and an actuating element configured in particular as a plate spring for opening and / or closing the friction clutch and with an actuation system assembled according to the invention.

The features listed individually in the patent 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. Like reference numerals designate like objects. Show it: a perspective view of the second assembly and the method according to step b);

2 shows a perspective view of the first assembly and the method according to FIG

 Step a);

3 shows a first perspective view of the actuation system and the method according to step c); 4 shows a second perspective view of the actuation system and the method according to step d);

Fig. 5 is a third perspective view of the actuation system and the method during step e);

Fig. 6 is a fourth perspective view of the actuation system and the method during step g);

Fig. 7 is a fifth perspective view of the actuation system and the method of step g); and

8 shows a detailed view of the receptacle from the second end face.

Fig. 1 shows a perspective view of the second assembly 8 and the method according to step b). The second subassembly 8 comprises the slave cylinder 2 with a first end side 9 on the clutch side and a second end face 10 on the transmission side, the slave cylinder 2 having on an outer peripheral surface 11 a receptacle 12 for the second end 7 of the spiral spring 3. Fig. 2 shows a perspective view of the first assembly 5 and the method according to step a). The first assembly 5 consists of the bearing ring 4 and the coil spring 3, which has a first end 6 and a second end 7. Here, the first end 6 and the second end 7 of the coil spring 3 each extend in the radial direction 16. The bearing ring 4 is rotatably connected to the first end 6. The bearing ring 4 has a support 20 for the coil spring 3. The coil spring 20 is fixed on the bearing ring 4. The coil spring 3 has here 1, 5 turns. In such an embodiment, the coil spring 3 is not fixed. Fig. 3 shows a first perspective view of the actuating system 1 and the method according to step c). Here, the bearing ring 4 of the first assembly 5 is arranged on the first end face 9 of the slave cylinder 2. The spiral spring 3 with the second end 7 extends in the circumferential direction 13 about the outer peripheral surface 1 1 of the slave cylinder 2. Fig. 4 shows a second perspective view of the actuating system 1 and the method according to step d). In step d), the second end 7 of the coil spring 3 is bent towards the second end face 10 (see arrow), so that the spiral spring 3 with its second end 7 in the following step e), due to a rotation of bearing ring 4 and slave cylinder 2 to each other, can be advanced in a circumferential direction 13 on the receptacle 12, so that the receptacle 12 is arranged in an axial direction 14 between the second end 7 and the first end face 9 (see FIG. 5).

Fig. 5 shows a third perspective view of the actuating system 1 and the method during step e). Here bearing ring 4 and slave cylinder 2 are rotated to each other (see arrows in the circumferential direction 13) that the second end 7 is advanced in a circumferential direction 13 on the receptacle 12 and the receptacle 12 in an axial direction 14 between the second end 7 and the first end page. 9 is arranged.

Fig. 6 shows a fourth perspective view of the actuating system 1 and the method during step g). Here, the second end 7 has already been relieved (step f), so that the coil spring 3 designed as a tension spring 19 rests in the axial direction 14, in particular on the support region 15 or on the receptacle 12. In step g), the bearing ring 4 is rotated back relative to the slave cylinder 2 (see arrows in the circumferential direction 13) until the second end 7 engages in the receptacle 12 (see FIG. 7).

Fig. 7 shows a fifth perspective view of the actuating system 1 and the method of step g). Here, the bearing ring 4 has been turned back relative to the slave cylinder 2 until the second end 7 is engaged in the receptacle 12. It can be seen from FIGS. 3 to 7 that the at least one support region 15 is arranged opposite the receptacle 12 essentially on an opposite side of the slave cylinder 2. 8 shows a detailed view of the receptacle 12 from the second end face 10. The receptacle 12 has a pin 17 which extends at a distance from the outer circumferential face 1 1 along the axial direction 14, so that the spiral spring 3 with the second end 7 between the outer peripheral surface 1 1 and the pin 17 can be arranged. Next, the receptacle 12 in the circumferential direction 13 on a stop surface 18, so that the second end 7 between pin 17 and stop surface 18 can be arranged.

From Figs. 8 and 9 it can be seen that the tension spring 19 (normally loaded on train) executed spiral spring 3 is arranged automatically upon rotation of slave cylinder 2 and bearing ring 4 in the receptacle 12. The only requirement is that the receptacle 12 is arranged in an axial direction 14 between the second end 7 and the first end face 9. As soon as the second end 7 is twisted so far in the circumferential direction 13 relative to the slave cylinder 2 that it fits between the pin 17 and abutment surface 18, the second end 7 of the spiral spring 3 springs in the axial direction 14 in the direction of the first end face 9. The spiral spring 3 is now secured against rotation and captive in the receptacle 12 (via the second end 7) and on the bearing ring 4 (via the first end 6). Thus, first assembly 5 and second assembly 8 and in particular bearing ring 4 and slave cylinder 2 are captively connected to each other.

In particular, a transport lock for the slave cylinder 2 with actuating piston arranged therein is realized in this way as well.

Reference number list Actuation system

slave cylinder

spiral spring

bearing ring

First assembly

First end

Second end

Second module

First front page

Second end face

Outer circumferential surface

admission

circumferentially

Axial direction

support area

Radial direction

pen

stop surface

mainspring

edition

Claims

claims Method for assembling an actuation system (1) for opening and / or closing a coupling; in particular for coupling a drive shaft of a motor vehicle engine with at least one transmission input shaft of a motor vehicle transmission, wherein the actuating system (1) comprises a slave cylinder (2) for disengaging and / or engaging a clutch actuated actuating piston, and an actuating bearing coupled to the actuating piston for displacing a relative to Slave cylinder (2) rotatable actuating element for actuating the clutch and a spiral spring (3) which engages on an actuating piston associated bearing ring (4) of the actuating bearing and on the slave cylinder (2) for removing drag torque from the bearing ring (4) the slave cylinder (2) are transmitted, comprising at least the following steps:  a) providing a first assembly (5) consisting of the bearing ring (4) and the spiral spring (3), which has a first end (6) and a second end (7), wherein the bearing ring (4) with the first end ( 6) is rotatably connected;  b) providing a second assembly (8) at least comprising the slave cylinder (2) with a coupling side first end face (9) and a getriebesei- term second end face (10), wherein the slave cylinder (2) on an outer peripheral surface (1 1) a Receiving means (12) for the second end (7);  c) arranging the bearing ring (4) on the first end face (9);  d) bending the second end (7) of the spiral spring (3) towards the second end face (10);  e) rotation of bearing ring (4) and slave cylinder (2) to each other, so that the second end (7) in a circumferential direction (13) on the receptacle (12) is advanced and the receptacle (12) in an axial direction (14) between the second end (7) and the first end face (9) is arranged;  f) relieving the second end (7);  g) Turning back bearing ring (4) against the slave cylinder (2) until the second end (7) engages in the receptacle (12). 2. The method of claim 1, wherein on the outer peripheral surface (1 1) at least one support area (15) is arranged, on which the coil spring (3) in the axial direction (14) is supported. 3. The method of claim 2, wherein the at least one support area (15) relative to the receptacle (12) is arranged substantially on an opposite side of the slave cylinder (2). 4. The method according to any one of the preceding claims, wherein the second end (7) in a radial direction (16) extends outwardly. 5. A method according to any one of the preceding claims, wherein the receptacle (12) comprises a pin (17) extending at a distance from the outer peripheral surface (11) along the axial direction (14) so that the coil spring (3 ) with the second End (7) between the outer peripheral surface (1 1) and the pin (17) can be arranged 6. The method according to any one of the preceding claims, wherein the receptacle (12) in the circumferential direction (13) has a stop surface (18), so that the second end (7) between pin (17) and stop surface (18) can be arranged. 7. The method according to any one of the preceding claims, wherein at least the steps d) to g) are automated. 8. The method according to any one of the preceding claims, wherein the spiral spring (3) is a tension spring (19). 9. The method according to any one of the preceding claims, wherein the bearing ring (4) is a mounting ring which cooperates in the installed state of the slave cylinder (2) with a bearing inner ring of the actuating bearing and thus forms a pre-assembly with the slave cylinder (2) and as a transport lock for the slave cylinder (2) with actuating piston arranged therein. 10. A clutch for coupling a drive shaft of an automotive engine having at least one transmission input shaft of a motor vehicle transmission with a friction clutch for frictionally coupling the drive shaft with the at least one transmission input shaft and a, in particular designed as a plate spring actuator for opening and / or closing the friction clutch and an actuating system (1 ) prepared according to any one of the preceding claims.