DE102010048495A1 - Method for adjusting a clearance of coupling devices - Google Patents

Abstract

The invention relates to a method for adjusting the air clearance in a coupling device, in which the actuating force is applied by means of at least one indirectly acting on a clutch disc pressure pot pressure of translations by an actuator. The invention is characterized in that a predefinable nominal clearance is set by calibrating the actuating element to a characterizing this characteristic as a function of at least one, an actual clearance at least indirectly characterizing size and at least one geometry of the actuator at least indirectly characterizing size, wherein for calibration Actuator is plastically deformed.

Description

The invention relates to a method for adjusting the air clearance directly operable coupling devices, in particular of double clutches with a housing and an actuating device mounted in the housing for applying an actuating force free of translation to an acting on the coupling device actuator, in particular pressure pot.

Coupling devices, in particular frictional coupling devices, act by frictional engagement with each other frictionally coupled elements. For this purpose, it is necessary to apply a contact force via an actuating device to the individual elements which can be brought into operative connection with one another. To produce such contact forces and to transmit them to the elements which can be brought into operative connection with one another, there are a large number of possibilities. In particular, so-called directly operable coupling devices, in which the actuator directly on the respective operatively engageable elements acts and not directly operable other coupling devices, in which the transmission of the corresponding forces by a gear ratio, distinguished.

Directly actuated clutch devices, in particular integrated in dual clutch devices, are exemplary from the document DE 10 2004 047 095 A1 previously known. The embodiment according to this document is characterized in that the coupling device comprising two coupling devices for torque transmission between a prime mover and a transmission is arranged and each individual coupling device has at least one clutch disc, which is assigned its own driven shaft, wherein the individual coupling devices each independently in each case an actuating mechanism on and disengaged. The closing force of the individual coupling device is thereby applied directly by the actuating mechanism and thus transmitted in the ratio 1: 1 to the coupling device. This applies analogously also to so-called directly operated simple coupling devices. These are in a straightening operation of the actuator, the geometry tolerances and the tolerances of the individual force applied elements directly into the clearance tolerance and thereby affect the clearance directly. In other coupling devices, in particular with wear adjustment, the tolerance compensation of the Lüftspielseinstellung on the wear adjustment takes place. In conventional clutch devices without wear adjustment, the adjustment is done by directing the tongues provided on the actuators, wherein the gear ratio is greater than 1 and thus can affect the geometry tolerances and Einstellgenauigkeiten only by a ratio given by the ratio on the clearance.

The invention is therefore based on the object, a method for adjusting the clearance of coupling devices, in which the operating force is applied free of an over- or reduction on the respective frictionally interconnected elements to be connected, further develop such that since Lüftspiel can be set as accurately as possible ,

The solution according to the invention is characterized by the features of claim 1. Advantageous embodiments are described in the subclaims.

A method for adjusting the clearance of directly operable coupling devices with a housing and an actuating device mounted in the housing for applying an actuating force free of translation to an acting on the coupling device actuator, in particular pressure pot, according to the invention is characterized in that a predetermined desired clearance by calibration of the actuating element is set to a characterizing this indicative guide as a function of at least one, an actual clearance at least indirectly characterizing size and at least one geometry of the actuator at least indirectly characterizing size, wherein the calibration element is plastically deformed.

The solution according to the invention allows a precise adjustment of the clearance, wherein the plastic deformation of the actuating element is largely free from the influence of geometric tolerances. The method can be done on the basis of the geometry measurement of the coupling device in combination with the geometry measurement of the actuator and on the other by the active determination of the clearance as a function of force on the Einrückweg in combination with the geometry measurement of the actuator.

In the former case, the coupling device is received via a holding plate or the bearing assembly and the at least one, the actual clearance at least indirectly characterizing size is formed by at least one actual value of the geometry of the coupling device in the unloaded state at least indirectly characterizing size. This size includes an enclosed by the coupling device Space descriptive relevant to the storage and / or the housing relevant height. In a first variant, the height dimension describes the axial distance of the region of the actuating element acting on the coupling device from a coupling-side housing wall. The geometric measurement of the coupling device thus does not take place with respect to the bearing arrangement for connecting the actuating device but with respect to a different reference plane than that for geometrical measurement of the actuating device, which is why tolerances within the coupling device are to be considered here. In contrast, the determination of a height dimension according to a second variant, which includes the axial distance of acting on the coupling device portion of the actuating element of an operating device side housing, in particular the bearing assembly, the advantage of the same reference plane, whereby tolerances can be disregarded.

According to a second embodiment of the method according to the invention, the determination of the actual clearance is performed by a force-displacement measurement, in particular detection of the Einrückweges on the force, wherein the touch point, d. H. the operating point of the gripping of the coupling device is determined.

For both embodiments, the geometrically relevant height dimension of the actuating device, which includes the axial distance between the connection of the actuating device to the housing and the effective range of the actuating device on the actuating element, is regarded as the variable which at least indirectly characterizes the geometry of the actuating device.

The plastic deformation of the actuating element can take various forms, in particular by pressing, embossing e. t. c. In this, the shape of the actuating element is adapted to adjust the required target clearance can.

The solution according to the invention is explained below with reference to figures. The following is shown in detail:

1a illustrates on the basis of an axial section of a double clutch the relevant geometric dimensions for a setting method according to the first embodiment;

1b illustrates on the basis of a Signalflußbildes the flow of a Einstellverfahrens according to the first embodiment;

2a illustrates on the basis of an axial section of a double clutch the relevant geometric dimensions for a setting method according to the second embodiment;

2 B illustrates a diagram for force / displacement measurement;

2c illustrated by a Signalflußbildes the flow of a Einstellverfahrens according to the second embodiment.

The 1a illustrated by a section of an axial section of a clutch unit 1 by way of example in the form of a double clutch 2 with two coupling devices K1, K2 for the inventive method for adjusting an air gap L _K1 , L _{K2 of} the individual coupling devices K1, K2 relevant geometric variables according to a first embodiment.

The first embodiment of the method is determined by the consideration of the relevant for the functioning of the individual coupling device K1, K2 geometric variables. In order to be able to describe these, the structure of the clutch unit is preceded 1 explained.

The clutch unit 1 in the form of a double clutch 2 comprises two coupling devices K1 and K2, these being coupling devices, in which the respective actuating force is applied without translation to the individual coupling device K1, K2. Such coupling units 1 serve the connection of a driving shaft, in particular a crankshaft only indicated here 3 an internal combustion engine with two drivable shafts, in particular two transmission input shafts, which are not shown here, and the optional separation of these. Here is the clutch unit 1 via a drive plate 4 (preferably a flexplate or driveplate) connected to the internal combustion engine. The crankshaft 3 forth in the drive plate 4 initiated torsional vibrations are applied to the clutch unit 1 or depending on the operation of the individual clutch devices K1 and K2 transmitted to the respective transmission input shafts. In this case, the coupling between the drive plate 4 and the crankshaft 3 directly, as in the 1 represented, carried out or there is also the possibility here between other transmission elements, for example in the form of elastic couplings, in particular devices for damping vibrations, between assign.

The drive plate 4 is in the range of its inner circumference with the crankshaft 3 firmly connected. The drive plate 4 is exemplified as a sheet metal part designed as part of a rotatable housing 5 for the clutch unit 1 serves.

The coupling devices K1, K2 are designed as frictionally engaged coupling devices, comprising at least one friction-surface-carrying and / or frictional-surface-forming clutch disc, here by way of example for each of the clutch devices K1 and K2 6 and 7 designated, wherein the friction surfaces of the clutch disc 6 each with 8.1 and 8.2 are designated and on both sides of the aligned in the axial direction end faces of a carrier 10 are arranged, also in analogy, the friction surfaces of the clutch disc 7 With 9.1 and 9.2 are designated, which at the axial direction away from each other facing end sides of the carrier 11 the clutch disc 7 are arranged in the form of friction linings. Also conceivable is the design of the friction surfaces 8.1 . 8.2 respectively 9.1 and 9.2 directly to the respective carriers 10 and 11 the clutch discs 6 . 7 ,

Here is one of the clutch discs 6 and 7 received by one of the transmission shafts, not shown here. The clutch disc 7 is for example on a radially inner shaft and the clutch disc 6 taken on the outer, preferably as a hollow shaft and coaxial with the inner shaft extending shaft. The clutch discs 6 and 7 are coupled here via devices D1, D2 for damping vibrations with the transmission input shafts.

The drive plate 4 , in particular the housing 5 , carries a counter pressure plate 13 for the clutch disc 7 the second coupling device K2, further on this turn and thus at least indirectly on the drive plate 4 the counterpressure plate 12 for the clutch disc 6 attached to the first coupling device K1. Both counter-pressure plates 12 and 13 are thus firmly connected to each other via radially outer regions via fastening means, which are formed, for example, by non-positive fastening means in the form of screws. The counter-pressure plates 12 . 13 can on the case 5 attached or be designed as components of it.

Furthermore, each of the individual coupling devices K1, K2 has a pressure plate 14 respectively 15 , which in a known manner via leaf spring elements either directly or indirectly rotatably with the counter-pressure plates 12 . 13 can be connected.

For versions in the form of double clutches 2 is the pressure plate 15 the second coupling device K2 in the axial direction between the two counter-pressure plates 13 and 12 arranged. Both counter-pressure plates 12 . 13 are also provided with another component in the form of a wall forming lid 16 for the formation of the housing 5 for the coupling devices K1, K2 connected. The coupling housing 5 serves to center an actuator 17 in the form of an engagement system, via which the individual clutch devices K1 and K2 can be selectively actuated. The actuator 17 is by means of a bearing assembly 18 , which is also referred to as a cover bearing, relative to the two coupling devices K1, K2 centered or supported. The actuation of the individual coupling devices K1, K2 or the displacement of the respective pressure plate 14 . 15 via actuators 19 . 20 in the form of pressure pots, which are in the form of annular sheet metal parts with an axial loading area 21 and / or axially aligned circumferentially spaced apart tongues 22 are formed on the respective pressure plate 14 . 15 be effective. These extend on the pressure pot 20 provided for the second coupling device K2 tongues 22 in the axial direction through openings of the counter-pressure plate 12 the first coupling device K1 therethrough, with the pressure plate 14 the first coupling device to be brought into operative connection. These openings may be in the form of slots or other shapes. Furthermore, the actuators 18 and 19 characterized by radial areas which are directly from the actuator 17 can be acted upon. These areas are areas on the inner circumference 23 respectively 24 the individual pressure pots. These areas have on the inner circumference 23 . 24 a plurality of circumferentially distributed openings that allow air circulation for cooling.

In the illustrated embodiment, both coupling devices K1, K2 are designed in such a way that they are actuated via the actuating elements 19 . 20 be forcibly closed. The axial forces required for closing are directly via the actuator 17 applied. This includes the actuator 17 in the case shown, at least two individual engagement devices 25 and 26 , which may be arranged coaxially in the illustrated embodiment and at least partially nested in the axial direction. These include an axially displaceable engagement bearing 27 respectively 28 , The engagement bearing 27 . 28 have a rotatable ring on the individual actuators 19 . 20 in the form of the pressure pots can act axially to the required for the torque to be transmitted contact forces on the pressure plates 14 and 15 transferred to. Regarding the structure of the actuator 17 exist a variety of ways. This can, as in the case shown, have two nested piston-cylinder units, which can preferably be hydraulically and / or pneumatically acted upon. These are exemplary in a common housing or carrier part 29 integrated. Other versions are conceivable. It is crucial that the actuator 17 via a bearing arrangement 18 in the case 5 stored and connected to this and thus the effective ranges of the individual engagement devices 25 . 26 on the engagement warehouse 27 . 28 Act. The effective ranges of the engagement bearing 27 . 28 on the actuators 19 . 20 are each labeled W1, W2.

The 1a also illustrates essential for the first embodiment of the method according to the invention essential coupling characteristics for the exact adjustment of an airway or clearance L _K1 , L _K2 the example of the first clutch device K1. The single air gap L _K1 , L _K2 describes in the open state of the coupling device K1, K2 the sum of the distances of a respective friction surface 8.1 . 8.2 respectively 9.1 . 9.2 from each cooperating with this contact surface of the pressure plate 14 . 15 as well as the counterpressure plate 12 . 13 ,

Shown are the geometrically relevant quantities for the first coupling device K1 in the form of geometrically relevant height dimensions H1, H3 and / or H2 from which there is a reference value A1 for the actuating element 19 , in particular, derive the pressure pot. The standard value A1 describes a setting for the pressure pot and is due to the axial extent of the pressure pot in installation position between pressure plate 14 and actuator 25 , in particular characterized the Einwirkbereich.

The height dimensions H1 and H2 describe the geometrically relevant variables of the coupling device K1 and are compared to the connection environment this, in particular the housing 5 and the bearing assembly 18 certainly. In this case, the interrupted line delimits the region of the coupling device K1 determined by the height dimension H1 with the coupling-side housing wall, in particular the space between the housing wall and the effective area of the actuating element 19 on the pressure plate 14 ,

The height H2 of the coupling device K1 determines the space enclosed between housing 5 and actuator 19 characterizing dimension. This can be achieved by the distance between the effective range of the actuating element 19 on the pressure plate 14 and the connection of the actuator 17 on the housing 5 , in particular the cover bearing 18 to be discribed.

The dotted line illustrates the by the height H3 of the engagement system, in particular the actuator 17 defined space. The height dimension H3 can be used as the axial distance dimension of the actuating device 25 to the actuator 19 be viewed and corresponds to an axial distance between one on the actuator 19 , in particular pressure pot for acting on the pressure plate 14 provided effective range W1 and the connection to the coupling housing 5 , in particular the bearing assembly 18 ,

From the mentioned geometrically relevant variables and the coupling device K1 itself characterizing variables, in particular dimensions, the standard dimension A1 for the actuating element 19 , In particular, the pressure pot are calculated, which is then adjusted by plastic deformation. The standard A1 describes the design, in particular the axial distance between the effective region of the actuating element 19 on the coupling device when actuated and the action of the actuator 17 on the actuator 19 ,

All versions of the coupling device K1 apply analogously to the coupling device K2.

The 1b clarifies the purpose of a signal flow diagram, the individual process steps. For this purpose, in a first method step, the coupling device K1 according to a first embodiment in method step A of a holding plate, which can be formed by a coupling-side housing wall or the bearing assembly 18 recorded, and in method step B first on a testing device via the actuating element 19 , in particular the pressure pot or a setting master determines a geometric height dimension. In this case, this height corresponds to the distance of the pressure pot from a coupling-side housing or the bearing assembly 18 , However, it is necessary for the accuracy of the clearance setting, the geometrically relevant height H3 on the bearing assembly 18 Tied and by the actuator 17 acting engagement system, in particular the engagement device 25 also to measure what is done in step C. By offsetting the two measured geometric variables H1 and / or H2 with H3 in method step D, the directional or setting dimension A1 for the configuration of the respective actuating element 19 , in particular pressure pot determined. The standard measure A1 results in dependence on the desired target clearance L _K1-soll and the corresponding height dimensions H1, H2, H3 and the actual state of the pressure pot, wherein the calibration to the standard dimension A1 by plastic deformation of the pressure pot in step E takes place ,

In contrast, the clarify 2a to 2c a method for adjusting the clearance a coupling device K1, K2 according to a second embodiment. The explanation and illustrations are made using the example of the coupling device K1. In this method, the determination of the clearance L _{K1 of} the coupling device relevant clearance takes place via a force / displacement measurement, in particular the Einrückweg s and the engagement force F, wherein the clearance L _{K1 is} by the touch point T, in particular the Einrückweg s at a Force F is determined at which grip the frictionally engaged with each other elements. Also for this method are the relevant variables for determining the actual clearance based on an axial section of a dual clutch device 2 shown. The basic structure corresponds to that in the 1a why in the illustration according to 2a the same reference numerals have been adopted for the same elements and with respect to the construction of the clutch unit 1 in the form of a double clutch 2 Reference is made to the comments under 1a. Shown here too are the relevant variables required for setting, in particular the height dimension H3 and the clearance L _K1-ist , which according to FIG 2 B is characterized by determining the force F over the adjustment path s until reaching a touch point T. This method step F replaces the method step B according to the first variant, which is described in 2c is shown on the basis of a signal flow diagram.

Both adjustment methods differ only in the determination of the variables characterizing these for the current clearance.

LIST OF REFERENCE NUMBERS

1

A clutch unit

2

Double coupling

3

crankshaft

4

countertop

5

casing

6

clutch disc

7

clutch disc

8th

friction surface

8.1, 8.2

friction surface

9.1, 9.2

friction surface

10

carrier

11

carrier

12

Platen

13

Platen

14

pressure plate

15

pressure plate

16

Tape component

17

actuator

18

bearing arrangement

19

actuator

20

actuator

21

tongue

22

tongue

23

inner circumference

24

inner circumference

25

engagement device

26

engagement device

27

release bearing

28

release bearing

29

support part

A1

Adjustment dimension actuator

K1

first coupling device

K2

second coupling device

L _K1

Clearance coupling device K1

L _K2

Clearance coupling device K2

L _K1-Is

Actual clearance clearance clutch 1

L _K1-soll

Setpoint clearance clutch 1

H1

Height dimension of the coupling device K1 first variant

H2

Height dimension of the coupling device K1 second variant

H3

Height of the actuator

F

force

s

Einrückweg coupling device K1

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

• DE 102004047095 A1 [0003]

Claims (6)

Method for adjusting the clearance of directly operable coupling devices (K1, K2) with a housing ( 5 ) and one in the housing ( 5 ) via a bearing arrangement ( 18 ) mounted actuating device ( 17 ) for applying an actuating force free of translations on an acting on the coupling device (K1, K2) actuating element ( 19 . 20 ), in particular pressure pot; characterized in that a presettable set clearance (L _K1-soll ) by calibration of the actuating element ( 19 . 20 ) to a characterizing standard (A1) as a function of at least one, an actual air play (L _K1-is ) at least indirectly characterizing size and at least one of the geometry of the actuator ( 17 ) is set at least indirectly characterizing size, wherein for calibration the actuating element ( 19 ) is plastically deformed. A method according to claim 1, characterized in that the coupling device (K1, K2) via one of the housing ( 5 ) formed or provided on this holding plate ( 16 ) or the bearing arrangement ( 18 ) is recorded and the at least one, the actual clearance (L _K1-is ) at least indirectly characterizing size of at least one the geometry of the coupling device (K1) in the unloaded state at least indirectly characterizing size is formed, which one descriptive of the coupling device (K1, K2) described space on the bearing assembly ( 18 ) and / or the housing ( 5 ) relevant relevant height dimension (H1, H2) of the coupling device (K1, K2) includes. A method according to claim 2, characterized in that as a relevant height dimension (H1, H2) of the coupling device (K1, K2) a first height dimension (H1) is considered, which is the axial distance of the coupling device (K1, K2) acting region of Actuating element ( 19 . 20 ) of a clutch side disposed wall of the housing ( 5 ) includes. A method according to claim 2 or 3, characterized in that as a relevant height dimension (H1, H2) of the coupling device (K1, K2) a second height dimension (H2) is considered which the axial distance of acting on the coupling device (K1, K2) Area of the actuating element ( 19 . 20 ) from an actuator side wall of the housing ( 5 ), in particular the actuator ( 17 ) on the housing ( 5 ) supporting bearing arrangement ( 18 ) includes. Method according to one of claims 1 to 4, characterized in that the coupling device (K1, K2) via the, the actuating device ( 17 ) on the housing ( 5 ) supporting bearing arrangement ( 18 ) and the actual air clearance (L _K1-ist ) is determined by a force-displacement measurement (F / S). Method according to one of claims 1 to 5, characterized in that as the geometry of the actuating device ( 17 ) at least indirectly characterizing size a geometrically relevant height dimension (H3) of the actuator ( 17 ), which determines the axial distance between the connection of the actuating device ( 17 ) on the housing ( 5 ) and the effective range of the actuating device on the actuating element ( 19 . 20 ) includes.

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