DE102013200170A1 - Method for wear adjustment with relative path limitation for friction clutch of motor car, involves placing positioning device at behind position by lowering actuation device by adjusting unit, when pressing plate is in rest position - Google Patents

Abstract

The method involves adjusting a positioning device (9) by an adjusting unit (7) through a release path (8) to reach a stop portion (10) at a spacing metal sheet (11), when the thickness of a friction lining portion (5) is reduced. The adjusting unit is provided to raise an actuation device (12), when a pressing plate (3) is located in rest position. The positioning device is placed at behind position by lowering the actuation device through the adjusting unit, when the pressing plate is located in rest position. Independent claims are included for the following: (1) a wear adjustment device; (2) a friction clutch; and (3) a motor car.

Description

The invention relates to a wear adjusting device with Relativwegbegrenzung for a friction clutch, and a method for wear adjustment with Relativwegbegrenzung.

In particular, the invention is in the field of friction clutches for motor vehicles application.

Friction clutches have on the friction partners on a torque transmitting friction surface, which wear over the time of use of the friction clutch, or wear, and thus can decrease in thickness. As a result, the travel paths for engaging the friction partners with increasing wear of the friction surfaces are longer. However, so that the actuating device does not have to describe an increasing traverse path, various wear adjusting devices have been developed in the prior art. Here, a variable-length element is used between the first friction partner and the adjusting device, which increases with increasing wear at least approximately corresponding to the decrease in thickness in its length.

A preferred wear adjustment comprises two wedge-like elements, which changes their overall height by mutual displacement, whereby the travel of the individual components remains constant despite decreasing thickness of the friction surfaces. The relative displacement of these two elements against each other is often performed by a gearing in one of the elements together with a worm gear. At one end of the worm gear, a drive pinion is arranged, which is further rotated by means of a drive pawl in one direction. As a result of the rotation of the drive pinion, the worm gear is moved and the two elements shift against each other. This is a height adjustment instead. The drive pawl is active at each engagement or disengagement and is limited by the thickness of a friction lining. As a result, an automatic path-controlled wear adjustment is possible. Such an arrangement is in the WO 2009/056092 A1 described. But there are also other arrangements conceivable that are driven by a drive pinion.

As a rule, the drive pinion is arranged on one of the two components, actuating device and pressure plate, and the drive pawl arrangement is arranged on a rigid component of the friction clutch. The drive pawl has a latch tongue which is adapted to engage in the drive pinion. By this arrangement, the extension of the travel is mechanically sensed and converted directly into a rotation of the drive pinion. That is, each time the stroke lengthens, the drive pinion is rotated forward by the amount of extension of the travel. About this rotation of the drive pinion turn the actuator is extended accordingly. To ensure that the drive pinion moves only in this direction, the drive pinion is provided with a freewheeling toothing, so that the engagement tip of the latching tongue of the drive pawl assembly engages in the desired forward direction and slips in the undesired return direction over the teeth. To secure a once set rotational position of the drive pinion is usually additionally provided a locking device, for example in the form of a friction brake or in the form of a pawl. The principle of a pawl is the same as that of the latch tongue of a drive pawl assembly; the pawl slips on a rotation in the forward direction on the freewheel teeth and prevents rotation in the return direction by engaging in the teeth.

Thus, the travel of the actuator remains largely constant, it is necessary to fine tune the adjustment by means of the freewheeling pinion and the drive pawl arrangement. In this case, however, unintentionally by vibrations in the overall arrangement, for example when engaging the pressure plate, a relative movement between the drive pawl assembly and the pressure plate arise, which leads to an undesirable excessive readjustment of the wear adjustment. This excessive adjustment is fixed by the locking device and is solvable again only with excessive effort. Excessive engagement, however, can lead to excessive wear of the friction surface, thus reducing the life of the assembly. In addition, the components of the wear adjusting device are overloaded because the engagement forces are increased. On the other hand, it is sometimes desirable to readjust the wear adjusting device actively, that is, independently of the travel control. An active readjustment is particularly desirable when subsidence phenomena occur outside the region sensed by the wear adjustment device, for example at the engagement device. An active readjustment is not possible with the previously known wear adjusting devices.

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.

• a) Zurücklegen eines Einrückwegs mit einer Anpressplatte von einer Ruheposition bis gegen einen verschleißenden Reibbelag mit einer abnehmenden Dicke und dabei Vorstellen einer Nachstelleinheit;
• b) nach Schritt a), Zurücklegen eines Ausrückwegs mit der Anpressplatte von dem Reibbelag in eine Ruheposition und dabei Nachstellen einer Stelleinrichtung mittels der Nachstelleinheit durch den Ausrückweg bis zum Erreichen eines Anschlags an einem Gegenanschlag, wenn die Dicke des Reibbelags abgenommen hat;
• c) zu einem Zeitpunkt, an dem die Anpressplatte ruht, wenn es erwünscht ist, weiteres Vorstellen der Nachstelleinheit durch Anheben einer Betätigungseinrichtung; und
• d) im Anschluss an Schritt c) und zu einem Zeitpunkt, an dem die Anpressplatte ruht, durch Senken der Betätigungseinrichtung Nachstellen der Stelleinrichtung.

The invention relates to a process for wear adjustment with Relativwegbegrenzung for a friction clutch, wherein the following steps are repeated:

• a) returning a Einrückwegs with a pressure plate from a rest position against a wear-resistant friction lining with a decreasing thickness and thereby presenting an adjusting unit;
• b) after step a), covering a Ausrückwegs with the pressure plate of the friction lining in a rest position and thereby adjusting an adjusting means of the adjusting unit through the Ausrückweg until reaching a stop against a counter-stop when the thickness of the friction lining has decreased;
• c) at a time when the pressure plate rests, if desired, further presenting the adjustment unit by lifting an actuator; and
• d) after step c) and at a time at which the pressure plate rests, by lowering the actuator adjusting the adjusting device.

With this method, the decreasing thickness of a friction lining as a result of wear is remotely adjusted. This ensures that the travel an actuator of the friction clutch does not change or only insignificantly. As a result, the actuating device can be designed to be particularly efficient and compact. In step a), the pressure plate is moved by means of an actuating device from a rest position to a wear-resistant friction lining. In this position, in which the pressure plate is pressed against the friction lining, a torque is frictionally transmitted, that is, by the contact force multiplied by the prevailing coefficient of friction generates a frictional force. By covering this engagement path, an adjustment unit is presented at the same time. When using a drive pawl and a drive pinion, this means that the drive pawl slides over the freewheel toothing of the drive pinion, and if necessary, it advances with an increase of the travel path into the toothing. In this case, there is still no adjustment of the adjusting unit. In the following step b), the torque transmission is interrupted by the pressure plate on the friction lining by the pressure plate is disengaged and moved to the rest position. In this rearward movement, the adjusting device is now readjusted by means of the adjusting unit. That is, the actuator is optionally extended if the thickness of the friction lining has decreased in comparison to the previous return operation. When using a drive pawl with a drive pinion, the drive pinion is rotated by the relative movement between the drive pawl and the drive pinion in the forward direction, so that the actuator is extended and the extension of the travel compensates so far that the travel of the actuator remains at least almost constant. The relative movement that causes the readjustment of an actuator is limited by the achievement of the stop at a counter-stop. This prevents over-adjustment from taking place and thus prevents the travel of the actuator from being shortened. This adjustment takes place only when the thickness of the friction lining has decreased; because only then has an extension of the travel occurred, so that when using a drive pawl with a drive pinion, a relative movement between the drive pawl and the drive pinion takes place to a rotation of the drive pinion and thus an adjustment of the adjusting device.

In some cases it is desirable, or required, that the actuator be adjusted further than is done by the path controlled adjustment by repeating steps a) and b) together with the wear of the friction lining. For this purpose, according to the method proposed here, the adjusting unit can be presented by lifting the actuating device. By subsequently lowering the actuator, the adjusting device is readjusted, that is, the actuator is extended. In particular, the actuator is used for adjusting and pressing the pressure plate against the friction lining for adjusting the adjusting device. In this case, the actuating device is preferably moved counter to the direction for engaging the pressure plate in order to introduce the adjusting unit. By this method is achieved on the one hand, that no unwanted readjustment due to, for example, vibrations occurs because an adjustment is limited by reaching a stop against a counter-stop. That is, a vibration of the pressure plate is also transmitted to the drive pawl when using a drive pawl, so that no or only a small relative movement between the drive pawl and the drive pinion takes place. At the same time, however, an adjustment of the adjusting device can also be activated actively, so that, for example, incorrect settings can be compensated.

• – eine Anpressplatte;
• – ein Antriebsritzel mit Freilaufverzahnung, welches an der Anpressplatte angeordnet ist und wobei die Freilaufverzahnung eine Vorlaufrichtung definiert;
• – eine Stelleinrichtung, welche an der Anpressplatte angeordnet ist und deren Länge mittels eines Drehens des Antriebsritzels in Vorlaufrichtung verlängerbar ist; und
• – eine Antriebsklinke, welche an einem starren Anbauteil beweglich angeordnet ist.

In a further aspect of the invention, a wear adjustment device with relative travel limitation for a friction clutch is described, which has the following components:

• - A pressure plate;
• - A drive pinion with freewheel teeth, which is arranged on the pressure plate and wherein the freewheeling toothing defines a feed direction;
• - An adjusting device which is arranged on the pressure plate and whose length can be extended by means of a rotation of the drive pinion in the forward direction; and
• - A drive pawl which is movably arranged on a rigid attachment.

Here, the drive pawl is adapted to rotate the drive pinion in the forward direction, when between the pressure plate and the drive pawl, a relative movement takes place.

• – einen ersten Anschlag, welcher an der Antriebsklinke angeordnet ist; und
• – eine Betätigungseinrichtung, welche dazu eingerichtet ist, mit dem ersten Anschlag zusammenzuwirken.

The wear adjustment device is characterized in that the wear adjustment device further comprises the following components:

• - A first stop, which is arranged on the drive pawl; and
• - An actuating device which is adapted to cooperate with the first stop.

Here, the drive pawl can be raised from a rest position by the actuating device and lowered back into the rest position, whereby the adjusting device can be extended.

The wear adjustment device is adapted to keep the travel for engaging or disengaging a pressure plate at least almost constant. For this purpose, a drive pinion with freewheel teeth is arranged on the pressure plate, which is thus moved with an engagement or disengagement of the pressure plate. The freewheel toothing defines a forward direction, so that the drive pinion can be rotated in just this forward direction and is not rotated in the opposite direction.

Furthermore, the wear adjustment device has an adjusting device, which is also arranged on the pressure plate and thus moved along, and whose length is variable. As a result, an extension of the travel path for engagement or disengagement of the pressure plate is bridged, so that the travel remains as constant as possible. The actuator is extended by the rotation of the drive pinion in the forward direction. The rotation of the drive pinion is achieved via a drive pawl, which is arranged on a rigid attachment. The rigid attachment does not move with the return movement of the pressure plate, so that a relative movement between the drive pawl and the drive pinion takes place. The drive pawl engages in the freewheel toothing and rotates the drive pinion in the forward direction, provided that the drive pawl previously engages over the freewheel teeth in the opposite direction in a subsequent tooth of the drive pinion.

Furthermore, the drive pawl on a first stop, which can cooperate with an actuating device. The actuator is movable against the first stop of the drive pawl and so can lift the drive pawl from a rest position, so that a relative movement between the drive pawl and the rigid attachment takes place.

At the same time there is a relative movement between the drive pawl and the drive pinion, so that when lowering the drive pawl back into the rest position, the drive pinion is rotated in the forward direction and thus the adjusting device is extended; also, the drive pinion can be temporarily rotated by lifting the drive pawl and slip by lowering the freewheel teeth. As a result, the wear adjustment device can be actively adjusted, that is to say readjusted independently of the travel control, if this is necessary, for example, as a result of erroneous travel control. Preferably, the actuating device is at the same time the actuating device for engagement or disengagement of the pressure plate, which is very particularly preferably moved against the actuating direction for engagement or disengagement of the pressure plate for this purpose to lift the drive pawl from a rest position.

• – einen zweiten Anschlag, welcher an der Anpressplatte angeordnet ist; und
• – ein Abstandsblech, welches an der Antriebsklinke angeordnet ist, wobei das Abstandsblech eingerichtet ist, mit dem zweiten Anschlag zusammenzuwirken, und eine Relativbewegung zwischen der Anpressplatte und der Antriebsklinke begrenzt wird.

In a further advantageous embodiment of the wear adjustment device, this further comprises the following components:

• - A second stop, which is arranged on the pressure plate; and
• - A spacer plate, which is arranged on the drive pawl, wherein the spacer plate is adapted to cooperate with the second stop, and a relative movement between the pressure plate and the drive pawl is limited.

The second stop serves to prevent unwanted relative movements between the drive pawl and the pressure plate, for example due to vibrations during engagement of the pressure plate. If the second stop on the spacer plate of the drive pawl, so the drive pawl is moved relative to the rigid attachment, but describes no relative movement relative to the drive pinion, so that no adjustment of the adjusting device occurs. Advantageously, the drive pawl consists of a latch tongue and a spring plate, wherein the spring plate holds the drive pawl in a rest position rigidly to the rigid attachment. Preferably, the drive pawl is integrally molded from a sheet metal. The spacer plate is now arranged on this spring plate, so that by a concern of the spacer plate on the second stop, the biasing spring is deflected and a relative movement between the latch tongue and the rigid attachment can take place. As a result, the relative movement between the drive pinion and the latching tongue is limited to the abutment of the spacer plate on the second stop, so then no readjustment of the adjusting device takes place.

In a further advantageous embodiment of the wear adjusting device, the actuating device is a return spring of a friction clutch.

By using the return spring as actuator for the drive pawl, the use of another component can be saved. In this case, the actuating device is preferably moved counter to its direction of engagement or disengagement direction for actuating the pressure plate in order to deflect the drive pawl. This ensures that no unintentional actuation of the drive pawl occurs during normal operation.

In a further advantageous embodiment of the wear adjustment device, the return spring is a lever which is pressed down or pulled up to disengage the pressure plate and / or lift the drive pawl.

To apply large forces with a small back cylinder to operate a friction clutch, it is advantageous to use a force-enhancing lever. The proposed arrangement of the drive pawl can be introduced into most friction clutches without major constructive interference. Preferably, a synchronous movement is performed to disengage the pressure plate and to lift the drive pawl. That is, the lever is pressed to disengage the pressure plate, so by further pressing the lever, the drive pawl is raised and, conversely, the lever is raised to disengage, the drive pawl is raised by further pulling the lever.

In a further advantageous embodiment of the wear adjusting device, the second stop is arranged on the adjusting device, so that a distance of the second stop to the pressure plate is extended with an extension of the adjusting device.

By arranging the second stop on the adjusting device and the second stop is kept constant in its distance relative to the rigid attachment. As a result, the relative movement between the drive pawl and the drive pinion is kept very low in a constant window. As a result, the wear adjustment device is particularly effective because the necessary relative movements are small.

In a further advantageous embodiment of the wear adjusting device, the drive pawl has a drive tongue and a biasing spring, and the biasing spring forms the spacer plate.

This ensures that the possible deflection of the drive pawl is extended when concerns the spacer plate on the second stop. Thus, the drive pawl in a relative movement between the rigid member on which the drive pawl is arranged to be moved with a raised biasing spring by the drive pinion until the drive pawl is applied to the biasing spring. Thus, no adjustment of the actuator takes place.

In a further advantageous embodiment of the wear adjusting device, the first stop forms a third stop, which is adapted to cooperate with the rigid attachment and thereby to limit lifting by the actuating device.

For example, if the actuator is pressed against the first stop of the drive pawl, the drive pawl is deflected. This deflection is limited by the third stop, which is pressed against the rigid attachment, preferably a clutch housing. As a result, a defined Nachstellweg the drive pawl is achieved at any movement of the actuator. If the biasing spring deflected by the second stop together with the spacer plate, the movement of the drive pawl is also limited by the third stop, so that an adjustment takes place, even if the biasing spring is further deflected by the second stop and the spacer plate and the movement of the latching tongue can not limit.

• – Die Anpressplatte vibriert, soll aber nicht nachgestellt werden. Dies wird durch den zweiten Anschlag oder den dritten Anschlag erreicht.
• – Die Anpressplatte vibriert oder bewegt sich mit großer Amplitude und muss daher nachgestellt werden. Durch den dritten Anschlag wird die Aufhebung der Relativbewegung vom Anschlag und Abstandsblech wieder aufgehoben und die Stelleinrichtung wird nachgestellt.
• – Ein erwünschtes Nachstellen der Stelleinrichtung kann aktiv von außen durch Anstoßen der Betätigungseinrichtung herbeigeführt werden.

By this arrangement, the influence of vibrations that can lead to an undesirable adjustment in conventional wear adjuster prevented because these vibrations move in a narrow frame, that is, with a small amplitude, which is allowed by the distance of the third stop to the rigid attachment , Particularly preferably, this distance corresponds to the toothing of the drive pinion, so that the drive pawl does not engage in a subsequent toothing in a vibration in this area and can rotate the drive pawl in the forward direction. At the same time, however, a movement having an amplitude which exceeds the distance of the third stop to the rigid attachment is converted into an adjustment of the direction of adjustment. Such a wear adjustment device is therefore set up for the following states:

• - The pressure plate vibrates, but should not be readjusted. This is achieved by the second stop or the third stop.
• - The pressure plate vibrates or moves with high amplitude and must therefore be readjusted. By the third stop the cancellation of the relative movement of the stop and spacer plate is canceled and the actuator is readjusted.
• - A desired adjustment of the adjusting device can be actively brought about from the outside by pushing the actuator.

In a further aspect of the invention, a friction clutch with wear adjustment device with Relativwegbegrenzung according to the above description is proposed, wherein the friction clutch has at least one clutch disc, a clutch cover and a center. Here, the at least one pressure plate, the clutch cover, the return spring and the at least one clutch disc are arranged concentrically to this center, and the clutch cover forms the rigid attachment.

Such a friction clutch, which is especially adapted for motor vehicles for transmitting a torque from a drive unit to a drive train, has at least one clutch disc, a clutch cover and a center. The center forms at the same time the center line of the torque and the pressure plate, the clutch cover, the return spring and the at least one clutch disc are arranged concentrically rotatory about this center. If the at least one pressure plate is pressed against the corresponding clutch disc, a torque is transmitted, for example, from the pressure plate to the clutch disc via the friction between the pressure plate and the clutch disc. The clutch cover framed while the pressure plate and the clutch disc, which describe relative to each other a movement in the direction parallel to the center, that is, the rotational center line. The clutch cover is rigid in this direction and is therefore suitable for use as a rigid attachment for the wear adjuster. Thus, the use of another component is saved.

In a further aspect of the invention, a motor vehicle is described, 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, wherein the friction clutch is configured to operate in accordance with the method described above become.

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 need for a friction clutch of small size and also at low cost is a need in the automotive industry, the limits are always postponed. The proposed friction clutch allows the use of a very compact and efficient return mechanism, wherein at the same time a wear adjustment is provided which is adapted to all effects occurring in the friction clutch, and according to the method for adjusting the adjusting device is used in addition to the compact size of such a friction clutch extends the life of such a friction clutch, because the distance between the pressure plate and the clutch disc is always kept in a narrow frame. In addition, very thick friction linings can be used and at the same time a return spring with a very small stroke can be used.

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 section of a friction clutch with depressed wear adjustment device,

2 a section of a friction clutch with pulled wear adjustment device,

3 : a graphic representation of the relationship between the adjustment and the wear,

4 A motor vehicle with a drive unit transverse to the longitudinal axis.

1 shows a section of a friction clutch 1 with a center 28 , By the actuator 12 is via an adjusting device 9 a pressure plate 3 against a friction lining 5 one clutch disc 26 pressed, with the pressure plate 3 starting from a rest position 4 a Einrückweg 2 describes. At the rearward movement of the pressure plate 3 put the pressure plate 3 a Ausrückweg 8th back to the resting position 4 back. At a decrease in thickness 6 of friction lining 5 the clutch disc 26 extends the Einrückweg 2 the pressure plate 3 , This extension of the engagement route 2 is by the length 17 the job direction 9 bridged, which is changeable. Thus, the amount of the Einrückwegs remains 2 and Ausrückwegs 8th constant. The resting position 4 but it is postponed. The adjusting device 9 is via a drive pinion 14 with freewheel toothing 15 adjusted by the drive pinion 14 over the drive tongue 23 in the forward direction 16 by the movement along the engagement path 2 and the release route 8th is turned. The adjusting device 9 together with the drive pinion 14 and a worm gear, not shown, form the adjusting unit 7 , The adjustment unit 7 together with the drive pawl 18 forms the wear adjustment device 13 , The drive pawl 18 is in the representation in the rest position 21 , which by the biasing spring 24 together with the rigid attachment 19 is formed. The drive pawl 18 is over a mounting bolt 35 with the rigid attachment 19 connected. The rigid attachment 19 is in the present example in one piece by the clutch cover 27 educated. A relative movement between the drive tongue 23 and the pinion 14 is about the second stop 10 together with the spacer plate 11 limited. Furthermore, in this example, the distance 22 of the second stop 10 mutable. In the present example, the spacer plate 11 from the biasing spring 24 educated. The drive pawl 18 continues to make a first stop 20 , which with the actuator 12 , which is designed here as a return spring and lever cooperates. About this lever of the actuator 12 is the drive pawl 18 by means of a pressure movement 33 the actuator 12 raisable, whereby the previously limited relative movement between the drive tongue 23 and the pinion 14 will be annulled. This lifting movement is over the third stop 25 together with the rigid attachment 19 limited.

2 shows a section of a friction clutch 1 around a center 28 rotates and performs the same function as the configuration in 1 , This is the drive pawl 18 about a train movement 34 the actuator 12 initiated. As well in 1 as well as in 2 forms the pressure plate 3 the lower ramp of the actuator 9 , The change of length 17 the adjusting device 9 So finds by turning the actuator 9 opposite the pressure plate 3 instead of. This lowers the pressure plate 3 in a new resting position 4 and describes on the basis of an equal amount Einrückweg 2 and Ausrückweg 8th ,

3 shows the relationship between the position of the pressure plate 3 and the location of the actuator 12 at a single stroke. On the ordinate axis 39 the position of the pressure plate is shown and on the abscissa 40 is the location of the actuator 12 shown. The normal release path 41 does not lead to a shift of the rest position 46 , Only when exercising the impetus 45 becomes the controlled overpass 42 exerted, which is a shift of the rest position 46 the pressure plate 3 caused. The displacement of the rest position is at a respective stroke up to the maximum Antriebsklinzenhub 43 limited. For repeated engagement of the pressure plate 3 becomes the engagement force 44 exercised. From this representation it becomes clear that from the interplay of the different stops a secure adjustment with a tolerance is possible and at the same time an active readjustment by pushing can be achieved.

In 4 is a motor vehicle 29 shown with a transverse drive unit 30 that goes beyond the output shaft 31 over the friction clutch 1 a torque on the drive train 32 transfers. The drive unit 30 is with the motor axis 38 across the midline 37 of the motor vehicle 29 and in front of the driver's cab 36 arranged.

With the proposed invention, the life of a friction clutch can be increased by over-adjustment can be prevented and at the same time an active triggering an adjustment is possible.

LIST OF REFERENCE NUMBERS

1

 friction clutch

2

 engagement path

3

 pressure plate

4

 rest position

5

 friction lining

6

 thickness

7

 adjusting unit

8th

 declutching

9

 setting device

10

 second stop

11

 shim

12

 actuator

13

 wear adjustment

14

 pinion

15

 Freewheel teeth

16

 forward direction

17

 length

18

 drive pawl

19

 rigid attachment

20

 first stop

21

 rest position

22

 distance

23

 drive tongue

24

 biasing spring

25

 third stop

26

 clutch disc

27

 clutch cover

28

 center

29

 motor vehicle

30

 drive unit

31

 output shaft

32

 powertrain

33

 pressure movement

34

 pulling

35

 mounting bolts

36

 cab

37

 center line

38

 motor axis

39

 Position of the pressure plate

40

 Position of the actuator

41

 normal release travel

42

 controlled overpass

43

 maximum drive pawl stroke

44

 apply force

45

 pushing force

46

 rest position

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2009/056092 A1 [0004]

Claims (10)

Method for adjusting wear with relative travel limitation for a friction clutch ( 1 ), wherein the following steps are repeated: a) covering an engagement path ( 2 ) with a pressure plate ( 3 ) from a rest position ( 4 ) against a wear-resistant friction lining ( 5 ) of decreasing thickness ( 6 ) and thereby presenting an adjustment unit ( 7 ); b) after step a), covering a release path ( 8th ) with the pressure plate ( 3 ) of the friction lining ( 5 ) in a rest position ( 4 ) while adjusting an adjusting device ( 9 ) by means of the adjusting unit ( 7 ) through the Ausrückweg ( 8th ) until reaching a stop ( 10 ) at a counter stop ( 11 ), if the thickness ( 7 ) of the friction lining ( 5 ) has decreased; c) at a time when the pressure plate ( 3 ) rests, if it is desired, further introducing the adjusting unit ( 7 ) by lifting an actuator ( 12 ); and d) following step c) and at a time when the pressure plate ( 3 ) by lowering the actuator ( 12 ) Adjustment of the adjusting device ( 9 ). Wear adjustment device ( 13 ) with Relativwegbegrenzung for a friction clutch ( 1 ), comprising the following components: - a pressure plate ( 6 ); A drive pinion ( 14 ) with freewheeling toothing ( 15 ), which on the pressure plate ( 3 ) is arranged and wherein the freewheeling toothing ( 15 ) a forward direction ( 16 ) Are defined; An adjusting device ( 9 ), which on the pressure plate ( 3 ) and whose length ( 17 ) by means of a rotation of the drive pinion ( 14 ) in the forward direction ( 16 ) is renewable; and - a drive pawl ( 18 ), which on a rigid attachment ( 19 ) is movably arranged; the driving pawl ( 18 ), the drive pinion ( 14 ) in the forward direction ( 16 ), when between the pressure plate ( 3 ) and the drive pawl ( 18 ) takes place a relative movement, characterized in that the wear adjusting device ( 13 ) further comprises the following components: - a first stop ( 20 ), which at the drive pawl ( 18 ) is arranged; and - an actuating device ( 12 ), which is set up with the first stop ( 20 ) interacting with each other by the actuator ( 12 ) the drive pawl ( 18 ) from a rest position ( 21 ) and back to the rest position ( 21 ), whereby the adjusting device ( 9 ) can be extended. Wear adjustment device ( 13 ) according to claim 2, wherein the wear adjustment device ( 13 ) further comprises the following components: - a second stop ( 10 ), which on the pressure plate ( 3 ) is arranged; and - a spacer plate ( 11 ), which at the drive pawl ( 18 ) is arranged, wherein the spacer plate ( 11 ), with the second stop ( 10 ), and a relative movement between the pressure plate ( 3 ) and the drive pawl ( 18 ) is limited. Wear adjustment device ( 13 ) according to claim 2 or 3, wherein the actuating device ( 12 ) a return spring of a friction clutch ( 1 ). Wear adjustment device ( 13 ) according to claim 4, wherein the return spring is a lever and for disengaging the pressure plate ( 3 ) and / or raising the drive pawl ( 18 ) is pushed down or pulled up. Wear adjustment device ( 13 ) according to one of claims 2 to 5, wherein the second stop ( 10 ) on the adjusting device ( 9 ) is arranged so that a distance ( 22 ) of the second stop ( 10 ) to the pressure plate ( 3 ) extended. Wear adjustment device ( 13 ) according to one of claims 2 to 6, wherein the drive pawl ( 13 ) a drive tongue ( 23 ) and a biasing spring ( 24 ), and wherein the biasing spring ( 24 ) the spacer plate ( 11 ) trains. Wear adjustment device ( 13 ) according to one of claims 2 to 7, wherein the first stop ( 20 ) a third stop ( 25 ), which is adapted to the rigid attachment ( 19 ) and thereby raising the actuator ( 12 ) is limited. Friction clutch ( 1 ) with wear adjustment device ( 13 ) with Relativwegbegrenzung according to any one of the preceding claims 2 to 8, wherein the friction clutch ( 1 ) at least one clutch disc ( 26 ), a clutch cover ( 27 ) and a center ( 28 ), and wherein the at least one pressure plate ( 3 ), the clutch cover ( 19 ), the actuating device ( 12 ) and the at least one clutch disc ( 26 ) concentric to this center ( 28 ) are arranged, and wherein the clutch cover ( 27 ) the rigid attachment ( 19 ). Motor vehicle ( 29 ) comprising a drive unit ( 30 ) with an output shaft ( 31 ), a powertrain ( 32 ) and a friction clutch ( 1 ) according to claim 9 for releasably connecting the output shaft ( 31 ) with the drive train ( 32 ), where the Friction clutch ( 1 ) is adapted to carry out the method according to claim 1.

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