WO2011060763A2

WO2011060763A2 - Clutch system

Info

Publication number: WO2011060763A2
Application number: PCT/DE2010/001342
Authority: WO
Inventors: Johannes Arnold; Dirk Hofstetter; Oliver Nöhl
Original assignee: Schaeffler Technologies Gmbh & Co. Kg
Priority date: 2009-11-20
Filing date: 2010-11-15
Publication date: 2011-05-26
Also published as: JP5738305B2; CN102575722A; CN102575722B; WO2011060763A3; DE112010004490A5; JP2013511668A; DE102010051447A1

Abstract

The invention relates to a multiple clutch device for a drive train comprising a drive unit, a downstream transmission which is connected to a drive shaft of the drive unit and is accommodated in a clutch bell (7) that does not co-rotate with the drive shaft of the drive unit, two wet multi-plate clutches (K1, K2), each of which includes a plate support at the input end and at the output end as well as plates alternating in the axial direction, and an actuation mechanism. A housing (28) of the actuation mechanism (27) is supported on the clutch bell (7), and the plate support (10) at the input end of at least one of the multi-plate clutches is connected to the housing of the actuation mechanism by means of a supporting metal sheet or a supporting pot (31) and a supporting bearing (30) in such a way that a flow of an actuation force generated by the actuation mechanism is redirected to the housing of the actuation mechanism via the supporting metal sheet or the supporting pot and the supporting bearing, thus creating a closed force flow within the multiple clutch device.

Description

coupling device

The present invention relates to a multiple clutch device, in particular a double wet clutch, for a drive train with a drive unit and one of the clutch device subsequently arranged transmission, wherein the coupling device is directly or indirectly connected to a drive shaft of the drive unit and received in a not co-rotating with the drive shaft of the drive unit clutch bell wherein the coupling device comprises two multi-plate clutches and an actuating device, and wherein the multi-plate clutches each comprise input-side and output-side plate carriers which have lamellae alternating in the axial direction.

From DE 10 2006 049 731 such a double wet clutch is known. In this known dual clutch, an actuating force generated by the actuator on the input side plate carrier, a support bearing and a Kupplungsüngsglocke firmly attached clutch cover is supported / For this purpose, the input-side plate carrier, the support bearing and the clutch cover are to be dimensioned correspondingly strong, the respective Betätigüngskraft of the depends on transmitted torque. With increasing torque, accordingly, a correspondingly higher actuation force and a correspondingly strong dimensioning, in particular of the clutch cover, is necessary. The storage of the output side of the DMF and the input side of the clutch via this clutch cover. The double wet clutch is lever operated. The actuating device has rotary levers, which can be actuated electrically or hydraulically.

It is an object of the present invention, a multiple coupling device of the type mentioned with improved support of an actuating force and / or an improved type of radial and / or axial bearing and / or an improved type of cooling oil guide and / or a manufacturing technology further optimized design of the components specify the multiple coupling device.

This object is achieved by a multiple coupling device having the features of at least one of the independent claims. Preferred embodiments of this multiple coupling device are the subject of the respective dependent claims.

The present invention will be explained in more detail below with reference to preferred embodiments in conjunction with the accompanying figures. In these show:

1 is a half section of a dual clutch according to a first embodiment,

2 is a schematic representation of the internal power flow of the radially inner multi-plate clutch K2 in their operation for the dual clutch of FIG. 1,

3 is a schematic representation of the mounting of the dual clutch according to Fig. 1 and Fig. 2,

4 shows a half section of the double clutch according to a further embodiment in a play-free plate carrier,

5 and 6 are schematic representations relating to built plate carrier,

7 shows a half section of the double clutch according to a further embodiment with internally closed power flow and operation via double ring piston ("CSC"),

8 shows a half section of the double clutch according to a further exemplary embodiment with a transmission shaft-fixed double wet clutch with axial backlash compensation in the oil supply,

9 is a half section of the double clutch according to a further embodiment with an axially floating mounted dual wet clutch with radial oil supply,

10 is a half section of the double clutch according to a further embodiment with a further axially floating double clutch here with a Flexpla- storage, 11 is a half section of the double clutch according to a further embodiment with a further axially floating double clutch here with a Flexpla- storage and a pilot,

12 is a half section of the double clutch according to another embodiment with a dry DMF,

13 is a half section of the double clutch according to another embodiment with a dry DMF, wherein the thrust bearing between the outer disk carrier of the outer clutch K1 and the clutch cover is omitted,

14 is a -half section of the double clutch according to another embodiment with internally closed power flow and wet running DMF and centrifugal pendulum ("FKP") and

Fig. 15 is a half-section of the double clutch according to another embodiment with internally closed power flow and wet running DMF and centrifugal pendulum ("FKP"), wherein the sheet metal claw or clamping claw has been omitted from FIG. 14.

Fig. 1 shows a double clutch 1 consisting of two radially nested, wet-running multi-plate clutches K1 and K2. Clutch K1 is radially outward and clutch K2 is arranged radially inward. The dual clutch 1 is driven by an output hub 2 of a dual-mass flywheel (not shown in detail, hereinafter also referred to as ZMS) connected upstream of the clutch 1. Between this ZMS and the double clutch 1 there is a clutch cover 3, which separates a wet space 4 from a drying space 5. A static seal 6 of the clutch cover 3 towards a transmission housing 7 of a drive train subsequently arranged transmission (not shown in detail) is preferably carried out via an O-ring 6 or other static sealing element. Towards the double clutch 1, the sealing takes place preferably via a radial shaft sealing ring 8 as a dynamic sealing element.

The output hub 2 of the DMF is rotatably connected via a toothing with a clutch hub 9. The clutch hub 9 is connected to the input-side plate carrier 10 of the outside in the radial nesting clutch K1. Alternatively, could Clutch hub 9 and the input-side plate carrier 10 are also integrally formed. The input-side plate carrier 10 of the multi-plate clutch K1 (= the outer input plate carrier 10) and the non-rotatably connected clutch hub 9 are supported radially via a radial bearing 16 on the first transmission input shaft 15 (which is designed as a solid shaft). The input-side plate carrier 10 comprises toothed regions on which input-side plates of the plate set of the outer multi-plate clutch K1 are mounted, so that the outer input-side plates 11 are arranged rotationally fixed and axially displaceable. The outer input-side plates 11 are arranged alternately to outer output-side plates 12, wherein the outer input-side plates 11 and the alternately arranged outer output-side plates 12 together form the Lameilenpaket the clutch K1. The outer output-side plates 12 are rotatably and axially displaceable connected to an outer output-side plate carrier 13 of the outer multi-plate clutch K1. The outer output-side plate carrier 13 of the multi-plate clutch K1 comprises a hub 14, which is connected to the first transmission input shaft 15 of a (not shown in detail) dual-clutch transmission.

The input-side plate carrier 10 of the outer multi-plate clutch K1 is connected via the connecting plate 17, which is mounted in this, with an inner input-side plate carrier 18 of the radially inner multi-disc clutch K2. The inner input side slats of the radially inner multi-disc clutch K2 are rotationally fixed and mounted axially displaceable in a toothed region of the inner input disc carrier. These inner input side slats of the radially inner clutch K2 are arranged alternately to inner output side slats, which are rotatably and axially displaceable on an inner output side plate carrier 19 of the multi-plate clutch K2. The inner output-side plate carrier 19 has a hub region, on which the inner output-side plate carrier 19 is connected to a second transmission input shaft 20 (which is designed as a hollow shaft).

The inner output-side disk carrier 19 of the radially inner multi-disc clutch K2 is pressed by a corrugated spring 21 (and if necessary, also via a connecting piece 22) with the interposition of an axial bearing 23 against the outer output side plate carrier 13 of the radially outer multi-disc clutch K1. Instead of a corrugated spring and other Federlemente such as a cup spring package could be used. The outer output side plate carrier 13 arranged radially outward Multi-plate clutch K1 is again pressed with the interposition of the further axial bearing 24 against the outer input disk carrier 10 of the radially outer multi-disc clutch K1 or against the clutch hub 9. The outer input-side plate carrier 10 of the radially outer multi-disc clutch K1 in turn is pressed with the interposition of another thrust bearing 25 against the clutch cover 3, which is supported on the securing element 26 on the housing 7 of the transmission. As can be seen in particular in FIG. 1, the bearings 23, 24, 25 are preferably in the form of axial (needle) bearings. The connecting piece 22 is formed such that a flow path for cooling oil between the output side plate carriers is possible.

The transmission input shafts 15, 20 are arranged coaxially and nested here in the present case, wherein the outer transmission input shaft 20 is supported via a support bearing 38 in the housing 7, and wherein the inner transmission input shaft 15 is supported via a bearing in the outer hollow shaft 20.

The double clutch 1 further comprises an actuating device 27, which is designed as a central clutch release for both multi-plate clutches K1 and K2, with a housing 28 which is supported via a bearing ballus 29 on the housing 7 of the transmission. The present invention as a Doppelringkolbeneinrücker (also referred to as double CSC, where CSC stands for 'Concentric Slave Cylinder') formed actuator 27 comprises two annular and concentrically arranged pistons 31, 32nd

The variant of the actuating device 27 shown in FIGS. 1 to 4 shows an embodiment in which the two annular pistons 31, 32 slide on one another. Thus, the inner diameter of the outer piston 31 of the clutch K1 is simultaneously the sealing surface for the inner piston of the clutch K2. Alternatively, an embodiment is conceivable in which the two pistons are separated by an annular ridge on which the seals can slide. With such an alternative embodiment, a mutual influence of the piston 31, 32 are excluded by the seal.

However, the above-described possible embodiments of the actuator 27 are to be understood as examples only. Thus, instead of an annular piston and a different cross-sectional shape and / or a plurality of individual pistons along the circumference be provided distributed. Likewise, an electric or electro-mechanical release can be provided instead of the piston / cylinder units. In addition, mechanical actuation devices, in particular lever-actuated devices, could also be provided.

The piston seals of the annular piston 31, 32 are in the present case designed as elastomer seals, which are connected via positive connections with the respective pistons. As a positive connection z. For example, a conical groove in the piston conceivable, in which a corresponding spring of the elastomeric seal or the elastomeric seal itself is knotted. Alternatively, inserted seals from z. As PTFE or molded directly to the piston elastomer seals conceivable.

The annular pistons 31, 32 are received by the engagement housing 28, with holes in the Einrückergehäuse 28, which are not shown in detail in the figures serve to actuate the piston via pressurized oil.

In addition, the Einrückergehäuse 28 takes over the radial positioning of the piston on the Lagerballus 29 within the clutch bell. 4

Each of the actuating units of the actuating device 27 is connected via an actuating bearing 33, 34 with a power transmission device with which the respective actuating force is transmitted to the respective multi-plate clutch K1, K2. In the present case, each of the power transmission devices comprises a substantially rigid pressure pot 35 A, 35 B, which bears against the respective bearing 33, 34. It should be noted that, of course, each pressure pot has an elasticity, which leads to a certain spring action. However, with respect to the present actuating forces of the double clutch, the pressure pots may be considered as "substantially rigid." In addition, each of the power transmission means comprises a lever spring 36A, 36B which abuts the respective pressure pot 35A, 35B The lever ratio of this lever spring is used to force-translate the actuation forces generated by the actuators, each of which also includes a thrust piece 37A, 37B attached to the associated lever spring 36A , 36B and is in operative connection with the lamellae of the disk packs of the respective disk clutch K1, K2 The pressure pieces transmit the actuating forces on the plate packs of the multi-disc clutches K1 and K2. The plungers 37A, 37B are suspended in a radially outer region in the toothing of the respective input-side plate carrier axially displaceable and are centered by the teeth in the radial direction. Instead of these lever ratios of the actuating forces and a direct actuation can be provided via pressure pots, which are arranged between the actuating bearings and the disk packs, ie at a lever ratio of 1: 1.

On the housing 28 of the actuator 27 is in a outer shell area a support bearing 30 (also referred to as "cover bearing") arranged, which is connected via a tension pot 31 with the input-side plate carrier 10 of the radially outer multi-plate clutch K1. Here, an inner ring of the support bearing / Deckellagers a formed on a housing 28 collar on the housing 28 on the one hand and an outer ring of the support bearing / cover bearing on the tension pot 31 on the other hand in the way that a force from the input side plate carrier 10 of the multi-plate clutch K1 recirculated actuating force to the housing 28 is transferable. The support bearing 30, which returns the actuating force to the Einrückergehäuse 28 together with the Zugtopf 31 is preferably connected via a bayonet connection with the Einrückergehäuse 28.

When one of the pistons or both pistons is pressurized, these move or move in the direction of the crankshaft (in FIG. 1 to the left of the output hub of the DMF) and actuate the respective lever spring 36A via the entrainment of the associated pressure pot 35A, 35B. 36B, which in turn initiates the actuating force in the disk pack via the associated pressure piece 37A, 37B. The actuating force is transmitted to the radially inner clutch K2 via the input disk carrier 18 and the connecting piece 17 (also referred to as connecting plate) between input disk carrier of the radially inner multi-disc clutch K2 and the input side plate carrier 10 of the radially outer multi-disc clutch K1. The input-side plate carrier 10 in turn transmits the actuating force to the tension pot 31, which is connected via the support bearing 30 with the Einrückergehäuse 28.

In the case of the coupling K1 arranged radially on the outside, the actuation force introduced is returned directly to the pull pot 31 via the input disk carrier 10 and thus to the engagement housing 28 via the support bearing 30. The present double-CSC thus produces a force acting on the pressure pots in the direction of the drive unit pressure force, wherein in the housing 28, a correspondingly large and oppositely directed counterforce is generated, and wherein the tension pot and the support bearing again the actuating force with the same amount and the same direction to the Housing is returned. The fact that the support bearing 30 transmits the actuating force to the Einrückergehäuse 28, so the internal power flow within the clutch 1 is closed. This course of the actuating force for actuating the multi-plate clutch K2 is shown schematically in Fig. 2 via the dashed line L1. In the present case, therefore, no external forces at radial oil supply or almost no external forces at axial oil supply are free to operate the multi-plate clutches K1 and K2, which is why the clutch 1 requires no support of the actuating force on the clutch bell or motor side.

The hydraulic medium (actuator module) is the actuator via fittings that are connected to the clutch bell supplied.

The engagement housing 28 has a Drehmomentabstüt- tion within the clutch bell 4, so that a bearing friction within the support bearing 30 can not lead to a rotation of the Einrückergehäuses 28. As torque support, the fittings for pressure supply can be used. Alternatively, a separate support by pins or similar component may be provided, which engages in the mounting of the clutch in the clutch bell bottom.

In Fig. 3, the radial and axial bearing of the coupling 1 according to the embodiment shown in Fig. 1 via arrows P1 to P5 is shown schematically.

Viewed in the radial direction all rotating at engine speed components of the dual clutch 1 gear side are mounted on the Einrückergehäuse 28 and the motor side on the solid shaft 15. Arrow P1 in this case represents the support of the input side plate carrier 10 of the radially outer multi-disc clutch K1 and associated with this component components on the Einrückergehäuse 28. The Einrückergehäuse 28 in turn is based on the Lagerballus 29 on the bell bottom (on the gear housing) from, as indicated by arrow P2 shown. The bearing ballus 29 represents the angular compensation between solid shaft 15 and geared bearing base. The solid shaft 15 supports the motor side via the bearing 16 on the input side plate carrier 10 of the radially arranged outside arranged clutch K1, as above Arrow P3 shown. The with the respective transmission input speeds. of full and hollow shaft 15, 20 rotating coupling components 14, 19 are radially mounted on the waves seated on the hub hubs / hub areas.

The bearing ballus 29 can be replaced by a radial support on the outer transmission input shaft, preferably via a arranged on the outer transmission input shaft radial needle bearing.

Viewed axially, the clutch 1 is supported on the clutch cover 3, wherein the supporting force is applied by the wave spring 21. The axial bearing points are indicated by the arrows P4 and P5. In this case, the wave spring 21 is supported on a mounted on the hollow shaft 20 locking ring and the hub of the output side plate carrier 19 of the multi-plate clutch K2. The output-side plate carrier 19 of the multi-plate clutch K2 directs this axial force via a spacer 22 on a on the output side plate carrier 13 and its hub portion 14 located Axialnadelellager 23. The output side plate carrier 13 of the multi-plate clutch K1 is in turn supported via an axial needle bearing 24 on the input side plate carrier 10th the clutch K1, which is supported by a further needle bearing 25 on the clutch cover 3. The coupling system 1 is thus always aligned with the clutch cover 3. About the wave spring 21 Axialschwingungen and tolerances can be compensated. The axial needle bearings 23, 24, 25 can also be replaced by thrust washers. The above-described type of axial bearing of the present coupling 1 can also be used independently of the above-described internally closed power flow, ie in other types of actuating force flow and is a separately applicable solution generally for double (wet) couplings.

FIG. 4 shows a further exemplary embodiment of the present multiple coupling device, which completely corresponds to the exemplary embodiments already explained above with regard to the actuating force flow concept. Thus, all the above-mentioned features concerning the actuator between the embodiments of FIG. 1 to 3 and according to FIG. 4 match. Furthermore, in the present case again a ball bearing ball is provided to radially support the actuating housing 28 on the transmission housing 7 and compensate for an axial offset. However, the embodiment according to FIG. 4 differs from the above exemplary embodiment in the elements used for damping the rotational oscillations coming from the internal combustion engine: ZMS and / or centrifugal pendulum. Thus, according to the embodiment of FIG. 4, both the ZMS 39 and a centrifugal pendulum 40 in the clutch bell 4, ie in the wet room itself, arranged, which is delimited by a clutch cover 41 relative to the drying room. The clutch cover 41 is not provided in the present case for axial bearing of the clutch. Rather, it represents only the separation between the wet room 4 and drying space 5 via the sealing means 6 and 8.

The ZMS 39 comprises a primary-side ZMS plate 42 which is pot-shaped in the present case and comprises in its radially inner region a pilot pin 43 which engages in a recess 44 of the crankshaft 45 and centers the primary-side ZMS plate. In its radially outer region, the primary-side ZMS metal sheet 42 has pocket-shaped regions in which spring elements are accommodated, the end regions of the energy accumulators 46 not in contact with these pockets being in operative connection with a secondary-side ZMS flange 47. The secondary-side ZMS flange 47 is connected to a substantially cylindrical toothed plate 48 via the rivets 49, wherein the toothed plate 48 serves as an input-side plate carrier of the radially outwardly disposed coupling K1.

The input-side plate carrier 48 is connected via the connecting plate 50 with the

Input-side plate carrier 51 of the radially inner disc clutch K2 connected. This connecting plate 50 is also connected to the centrifugal pendulum 40 (here: integrally formed), so that the ZMS 39 and the centrifugal pendulum 40 are connected together with the toothed plate 48 (preferably via the rivets 49) and are connected in parallel accordingly.

The toothed plate 48 is connected via the tension pot 52 to the support bearing 53, which is arranged on the Einrückergehäuse 28 (as already described above).

The output side plate carrier 54 of the multi-plate clutch K1 is rotatably mounted on the hollow shaft 15. The output side plate carrier 55 of the multi-plate clutch K2 is rotatably mounted on the hollow shaft 20. The output-side plate carrier 54 of the multi-plate clutch K2 is biased via the corrugated spring 21 in conjunction with the securing element 21 A and the connecting element 22 against the output side plate carrier 54 with the interposition of a thrust bearing. The output-side plate carrier 54 of the plate coupling ment K1 is loaded with the interposition of another thrust bearing against the primary-side ZMS flange 42 (also referred to as 'ZMS sheet'). On the primary side ZMS plate 42, a drive plate 56 is fixed, which is connected via a screw 57 with a flexplate 58, wherein the flexplate is connected via a further screw 59 with the crankshaft 45.

The actuating device 27 in turn comprises actuating units, which in the present case are designed as piston / cylinder units, which in each case act on the respective disk sets of the multi-plate clutch K1 and K2 via the power transmission devices consisting of pressure pot, lever spring and thrust piece, as already described above.

The coupling 100 according to FIG. 4 is thus connected via the flex plate 58 to the internal combustion engine. The drive plate 56 and the primary-side ZMS sheet are directly (preferably oil-tight) connected to each other and take the axially interposed clutch cover 41 with radial shaft seal 8.

The primary-side components of the DMF are mounted directly on the crankshaft 45 via a pilot pin 43.

The secondary-side flange 47 of the ZMS in this case simultaneously represents the end plate of the multi-plate clutch K1.

The input-side plate carrier 48 of the multi-plate clutch K1 (as already described) designed as riveted variant.

Exemplary embodiments of a riveted plate carrier are shown in FIGS. 5 and 6.

FIG. 5 shows a built-up disk carrier 134 (comparable to the input side)

Plate carrier of Figure 4) in detail as a sectional view. The disk carrier 134 is formed from the flange portion 113a, the carrier disk 136, and connecting members 190 distributed axially therebetween. In the exemplary embodiment shown, the connecting elements 190 are formed from pre-bent sheet-metal parts 191, which have axially extending rivet pins 192, 193, which are guided through corresponding openings 194, 195 in the flange part 113a or support disk 136 and from the outside against these riveted. The pointing in Umfangsriehtung ends of the sheet metal parts 191 are bent or formed radially inwardly to form tooth flanks 196, so that in the cross section of the sheet metal parts 191 forms a tooth flank profile on which the lamellae are mounted 138, which have this for a complementary outer profile 197, so that the lamellae 138 are centered on the plate carrier 134 and the torque applied to the plate carrier 134 is transmitted to the lamellae 138. The lamellae 138 are alternately layered with the friction plates 140, which are rotationally fixedly mounted in the output-side plate carrier 142 and axially displaceably mounted.

FIG. 6 shows an alternative embodiment to the above-described disk carrier in the form of the disk carrier 135a in a built-up design. The plate carrier 135a has the connecting elements 190 of Figure 5 comparably formed connecting elements 198, which are riveted between the end plate 172a and the support plate 136. Furthermore, FIG. 6 shows a connecting element 190a with an axially extended pin 186 which, for example, replaces the connecting element 190 of FIG. 5 at several circumferential positions and thereby makes it possible to access the disc carrier 134 on the friction device 185 by virtue of the pins 186 engaging the friction ring 187 in FIG Take Umfangsriehtung with respect to the housing of the clutch unit and so control the friction device.

According to the exemplary embodiment shown in FIG. 4, the individual toothed plates have two different lengths and are distributed alternately over the circumference. The shorter toothing plates are riveted to the connecting plate 50 of the input-side plate carrier 48 and 51 of the multi-plate clutch K1 and K2. The longer Verzahnungsbleche are connected to the Zugtopf 52, which returns the actuating forces on the Einrückergehäuse 28. By means of these stepped toothed plates, it is achieved that the centrifugal pendulum is connected without play to the secondary flange of the DMF. Thus, the tension pot 52 is positively and non-positively connected to the input side plate carrier 48 of the multi-plate clutch K1 and can absorb the actuating forces occurring.

FIG. 7 shows a double wet clutch with internally closed power flow and actuation via a double-ring piston catcher integrated in the clutch via the cover bearing as a CSC fixed on the housing, the basic construction corresponding to the exemplary embodiment according to FIG. As explained in more detail below, the pistons of the double-ring piston catcher in this case guide the engagement force via shims into the blades. lenpakete the multi-plate clutches K1, K2. In the case of the inner clutch K2, in this case the actuating force flows via the outer disk carrier (= input disk carrier) and the intermediate web (= connecting plate 214) to the outer disk carrier of the outer clutch. From there, the force flows via the retaining ring 229 and the clutch cover 220 (= Zugtopf) back to the cover bearing 221, which returns the force via a locking ring 230 in the CSC and thus closes the power flow. In the case of the outer clutch K1, the force after the disk pack flows via the outer disk carrier 211, the securing ring 229, the clutch cover 220, the cover bearing 221 and the securing ring 230 between the end bearing and the CSC housing. Upon actuation, no forces are thus introduced into the environment.

In detail, Figure 7 shows a section of a drive train for a motor vehicle, such as cars or trucks, between a (not shown in detail) drive unit with a drive shaft 200 (in this case: an internal combustion engine with a crankshaft), which is connected to an input side 201 of a DMF is, wherein this input side 201 also carries a starter ring gear 202 and wherein in a radially outer region of the input side 201, a substantially closed receiving area 203 for spring elements 204 (usually: bow springs) is provided. An output part 205 of the ZMS engages in the bow springs 204, wherein the ZMS output part 205 is riveted to an additional flywheel 206. The ZMS output side 205 is radially inwardly connected to a flange portion 207, which has a radially inner toothing, which is in engagement with a radially outer toothing of a clutch hub 208. The toothing between the flange 207 on the output side of the DMF and the clutch hub 208 as the input side of the double wet clutch described in more detail below represents the parting plane between the DMF (engine assembly) connected to the engine and the dual wet clutch (transmission assembly) connected to the transmission during assembly, in which a rotationally fixed connection is provided with axial displacement. The clutch hub 208 is formed radially inward with a bearing seat for a radial bearing 209 (in the present case a needle bearing sleeve), wherein the clutch hub 208 is axially mounted on the inner transmission input shaft 210 via the bearing 209. Here, the bearing outer ring of the bearing 209 is firmly received in the clutch hub 208 and the rolling elements run directly on a corresponding peripheral surface of the transmission input shaft 210th

The clutch hub 208 is axially fixed and rotationally fixed with an input disk carrier 211 of a disk clutch K1 arranged radially on the outside in the radial nesting. Bound (in the present case: welded), between the input disk carrier 211 and the clutch hub 208 additionally a sleeve-like component 212 is clamped, which provides a running surface for a radial shaft seal that seals the sealing point between the clutch cover 213 and ZMS output flange.

The outer input disk carrier 211 is connected via a connecting plate 214 with an inner input disk carrier 215, which in the radial nesting radially inwardly arranged coupling K2. The respective connections between the input slave carriers 211, 215 and the connection plate 214 correspond to those already described above.

The output disk carrier 216 of the outer multi-plate clutch K1 is connected to the inner transmission input shaft 210 in a rotationally fixed manner but axially displaceably connected via an axial spline formed in an associated flange region.

The output disk carrier 217, the radially inner multi-disc clutch K2 is also rotatably connected via a formed in an associated flange axial splining with the outer transmission input shaft 218, but axially displaceable connected. In the present case, the associated toothing is formed in a hub region which is welded to the output disk carrier of the clutch K2, the hub region additionally having projections or depressions which form flow channels 217A in order to allow cooling oil to flow between the output disk carriers of the multi-disk clutches K1 and K2.

In addition, a spring element, such as a corrugated spring 219, is arranged between the hub region 217 and the hollow shaft 218 in order to bias the hub region / the output disk carrier of the multi-plate clutch K2 via an axial bearing on the output disk carrier of the multi-plate clutch K1 and via a further axial bearing on the clutch hub 208. The clutch hub 208 in turn is axially supported via the input disk carrier 211 of the multi-plate clutch K1 and a tension pot 220 in connection with the cover bearing 221 on the housing 222 of the CSC. The housing 223 of the CSC is braced on the bell bottom 224 via a substantially rigid, cup-shaped component 223, which functions like a clamping claw or sheet metal claw for clamping a workpiece in a processing machine. Alternatively, a resilient bias of the cup-shaped member 223 may be provided. The component 223 corresponding to a clamping claw / sheet metal claw serves to clamp an oil supply 224, with which oil to the CSC and the dar-. is forwarded in intended piston-cylinder units.

These piston-cylinder units in the CSC are connected via actuating bearings with substantially rigid pressure pots 226, 227, which act on the respective disk sets of the multi-plate clutches K1 and K2 with a lever ratio of 1: 1, with appropriate pressurization of the piston-cylinder units.

Between the substantially rigid pressure pots 226, 227 and the actuating bearings shims 228, 229 are provided for adjusting a clearance of the disk sets of the multi-disc clutches K1 and K2, which can be formed from the pressure cups tabs to position the shims radially, as in the example of Pressure pot 227 of the radially inner disc clutch K2 shown.

A radial guidance of the pressure pot 227 of the multi-plate clutch K2 takes place via a neck region which is formed on the connecting plate 214 and which is formed corresponding to a cylindrical region of the pressure pot 227.

The connecting plate 214 also includes tabs on which the return spring, which loads the pressure pot 227 in the opening direction of the multi-plate clutch, is supported.

A radial guidance of the pressure pot 226 of the multi-plate clutch K1 takes place via a cylindrical region formed on the tension pot 220, wherein a restoring spring, which biases the pressure pot 226 in the opening direction, is supported between an end face of the neck region formed on the connecting plate 220.

In summary, regarding the embodiment of FIG. 7, it can be seen that the CSC forms a unit capable of assembly together with the coupling. The system unit clutch / CSC is axially fixed via the sheet metal clamp on the bell bottom of the clutch bell. The Blechpratze is axially biased during assembly and takes in operation forces and moments to be initiated by the clutch via the cover bearing in the CSC. In addition, the sheet metal claw supports the pressure forces that are introduced axially into the CSC at the oil transfer. The system unit clutch / CSC is mounted via a centering collar on the CSC in the radial direction in the bell bottom. The forces that are supported by the centering collar are introduced into the CSC housing via the cover bearing. On the opposite side, the coupling is mounted on the inner transmission input shaft via a radial bearing, which is designed as a floating bearing.

To adjust the clearance, the distance between the contact surface of the locking ring on the clutch cover to the contact surface of the shim (s) is measured at the engagement bearing in the present case. In addition, the distance between the contact surface of the locking ring on the groove in the outer disk carrier of the outer coupling and the contact surface of the adjusting disk (s) on the pressure pot is measured. The difference of these measurement amounts less the required clearance on the disk set results in the thickness of the required shim.

In Fig. 8, an embodiment of a transmission shaft fixed double wet clutch is shown with axial play compensation in the oil supply.

The embodiment of the double wet clutch according to Figure 8 corresponds to the design of the ZMS with the input side 201, the bow springs 204 and the output side 205 and the connection with the additional mass 206 and the flange portion 207 and also concerning the essential features of the double wet clutch and its operation and the transmission input shafts and the bubble tray already mentioned above in connection with FIG.

The flange portion 207 'of the DMF, which carries the internal toothing, which communicates with an external toothing on the clutch hub 208' of the double wet clutch is, however, formed axially shorter, since the radial shaft seal on the cover 213 directly against an outer circumferential surface of the clutch hub 208 'rests and the Wet room seals against the drying room.

The structure of Figure 8 also differs from the structure of Figure 7 in the storage concept, since the clutch hub 208 'via a fixed bearing 209' on the inner transmission input shaft 210 'is mounted radially and axially. For mounting the fixed bearing 209 ', the clutch hub 208' on a Kupplungsnabendeckel 208 ", wherein a bearing outer ring of the fixed bearing 209 'between this cover 208" and the clutch hub 208' is clamped. An inner ring of the bearing 209 'is between a shaft shoulder and a locking ring the shaft 210 'attached. The input disk carrier 211 of the outer multi-plate clutch K1 is connected according to the embodiment of Figure 7 with the clutch hub 208 ', wherein also according to the embodiment of Figure 7, the tension pot 220 is connected via the cover bearing 221 with the housing 222 of the CSC.

The design of the piston-cylinder units in the CSC and the formation of the actuating bearing, shims and Betätigungsstöpfe corresponds to that described in connection with Figure 7.

Furthermore, the axial bearing of the wet clutch with corrugated spring and two thrust bearings on the clutch hub 208 'is formed according to the statements made in connection with Figure 7.

Instead of acting as a clamping claw / Blechpratze component 223 but in the present case a flexible sheet 300 is provided (hereinafter referred to as "flexplate"), which acts as an axially and radially "soft" torque support. The CSC housing 222 in turn is connected via tubes 301 to the oil supply in the transmission housing (at least one tube per piston-cylinder unit), wherein a length of the tubes is dimensioned so that an axial movement of the CSC housing 222 is made possible. Accordingly, the flexplate transfers no forces in the axial direction.

For radial support of the clutch and CSC system unit, a radial bearing 302 is provided between the CSC housing 222 and the outer transmission input shaft 218.

In summary, with regard to the exemplary embodiment according to FIG. 8, it can be stated that the system unit clutch / CSC is axially fixed via a fixed bearing on the inner transmission input shaft. In order to mount the circlip on the fixed bearing, the clutch also has a hub cap, which fixes the fixed bearing in the coupling and separates the wet room to the drying room. In addition, the pressure oil is supplied to the CSC via horizontally extending tubes. These pipes (one pipe per partial coupling) are sealed by seals on both sides to the CSC and the clutch bell. The tubes have play in the axial direction to compensate for axial shaft and clutch movements can. The flexplate is made axially soft in the present embodiment and follows the movements of the clutch. In the circumferential direction, the flexplate is stiff and supports the friction torque of the engagement bearing on the bell bottom. The flexplate does not necessarily have to be used as a rotary Symmetrical component be executed, but can also be designed as a sheet metal tab which is bolted to CSC and bubble cap.

As stated, the clutch is mounted in the radial direction on the fixed bearing on the inner transmission input shaft and mounted on the opposite side on the cover bearing and a needle bearing between the outer transmission input shaft and CSC housing.

In Fig. 9, an embodiment of an axially floating mounted dual wet clutch is shown with radial oil supply.

The embodiment according to FIG. 9 corresponds in many respects to the exemplary embodiment according to FIG. 8, for which reason only differences between these coupling units according to FIGS. 8 and 9 will be discussed below. Thus, the range from the crankshaft 200 to the clutch hub 208 'in the embodiments of FIGS. 8 and 9 is identical. The first major difference is that the bearing between the clutch hub 208 'and the inner transmission input shaft 210 "is designed as an axially movable bearing, since although the bearing outer ring of the bearing 400 between clutch hub cover 208' and clutch hub 208 'is clamped, but the bearing inner ring of the bearing 400 on the transmission input shaft 210 "is not fixed.

Furthermore, the embodiments of Figures 8 and 9 agree that a Flexplate 300 is provided, which connects the CSC housing 222 with the bell bottom 224, but with a different, presently radial type of oil supply via radially arranged pipes 401 and 402 between the transmission side Oil guide and CSC is provided. In the radial direction, the CSC housing 222 is again mounted on the outer transmission input shaft 218 via a radial needle bearing 302.

In summary, in the embodiment of FIG. 9, the system unit

Clutch / CSC via a floating bearing mounted radially on the inner transmission input shaft. Opposite the coupling via the cover bearing and a needle bearing between outer transmission input shaft and CSC housing is radially mounted. Furthermore, the double wet clutch according to this embodiment, axially floating between the flexplate 300 and the springs 403, 404, which are needed in the dual mass flywheel for the generation of the basic friction suspended. In addition, the actuating oil is supplied to the coupling in the radial direction via two pipes, wherein the lines are designed so that they Axial movements of the clutch can absorb. Each pipe consists for example of two sub-pipes, wherein the piece of pipe located in the CSC housing is mounted together with the system unit, and wherein subsequently the second sub-pipe is inserted through an opening in the clutch bell and connected to the first sub-pipe. The joints of the pipe sections are each sealed to each other and designed so that the pressure forces which act in the tube longitudinal direction can be recorded (not shown here). In order to separate the wet space from the drying room, there is present an additional seal between the opening of the clutch bell and the second part of the tube.

In Fig. 10 is an embodiment of another axially floating mounted

Double clutch, here with a Flexplatelagerung, shown.

The exemplary embodiment according to FIG. 10 comprises a double wet clutch with a clutch hub 208 and a bearing of the clutch hub 208 on the inner transmission input shaft 210 via the movable bearing 209, as already described above in connection with FIG. In addition, the exemplary embodiment according to FIG. 10 includes a connecting flange 207 between the output side 205 of the ZMS, which corresponds to that described in connection with FIG. Furthermore, the sleeve-like component 212 is provided, which is also described in connection with FIG. In addition, the features of the clutch cover 213 and the double wet clutch, in particular the axial bearing via the wave spring 219 in conjunction with the two Axialnadellagern to the clutch hub 208 and the operation via the pressure cups 226 and 227 described in connection with Figure 7 correspond. This is especially true as between the CSC housing 222 and the outer gear shaft 218 both in the embodiment of Figure 7 and in the embodiment of Figure 10, no radial bearing is provided.

However, the two embodiments of Figure 7 and Figure 10 differ in that in the embodiment of Figure 7 on the CSC housing an axial projection 228 is provided, on which the CSC housing 222 is mounted radially in the clutch bell 224, whereas in the embodiment according to FIG. 10, a flexplate 500 is provided, which connects the CSC housing 222 to the bell bottom 224, wherein a connection point between the flexplate 500 and the bell bottom is located radially outside the through-hole. knife of the double wet clutch is arranged to facilitate the corresponding assembly.

Comparable to the exemplary embodiment according to FIG. 9, an oil feed via tubes 501 and 502 is provided for supplying the CSC with hydraulic medium. In this case, the transmission housing-side tube 501 is screwed to the transmission housings. Furthermore, the CSC-side tube is attached to the CSC housing 222 via a screw connection. The tubes 501 and 502 are axially displaceable against each other and sealed against each other, with both tubes 501 and 502 extending substantially in the radial direction.

In summary, in the embodiment according to FIG. 10, the system unit clutch / CSC is mounted on the motor side via a movable bearing radially on the inner transmission input shaft. Opposite (= gearbox side), the coupling is mounted radially over the top bearing and the flexplate in the clutch bell. The CSC-side oil pipe part is connected to the CSC via a screw connection and sealed. The second line section (transmission housing side) is bolted to the clutch bell via a flange on the outside and sealed by an O-ring. The oil feed is here also made soft in the axial direction in order to accommodate the axial movements of the clutch and the system unit floats between the flexplate and springs on the dual mass flywheel, as already described in connection with FIG.

In Fig. 11 is an embodiment of another axially floating mounted

Double clutch shown here with a Flexplatelagerung, in addition to the axially floating storage and the Flexplatelagerung storage via a pilot between the crankshaft and clutch is provided. Here, the entire embodiment of the embodiment of FIG. 11 is identical to the embodiment of FIG. 10, wherein a pilot 600 is provided, which is designed as an extension of the clutch hub 208. A floating bearing (e.g., a radial needle bearing) is disposed between the pilot 600 and the crankshaft 200.

FIG. 12 shows an exemplary embodiment of a further double wet clutch with a dry DMF.

According to the exemplary embodiment according to FIG. 12, a ZMS is shown with radially outer bow springs and radially inner bow springs, which are used in particular in internal combustion engines with pronounced rotational irregularities. can, but the formation of the ZMS for the design of the dual clutch and the connection between ZMS and dual clutch and also for the actuator of the double clutch is not of any restrictive importance. Rather, it is only relevant that a DMF and another torsional vibration damping system with input side 201 and output side 205 'is provided between the crankshaft 200 and double wet clutch, wherein an output flange 207 "is connected to an input hub 700, which essentially corresponds to the embodiment according to FIG The design of the input disk carrier 701 corresponds to the input disk carrier 13 described in connection with FIG. 1. Furthermore, the input hub 700 and the associated input disk carrier of the clutch K1 are radially supported on the inner transmission input shaft 703 via a radial bearing 702 corresponding to the radial bearing 16 of FIG. The wet room 704 in which the double wet clutch is received, is supported by the bell bottom 705 and the clutch cover 706, wherein between the clutch cover 706 and input hub 700, a radial shaft seal is provided which runs on a tread 707, which on a he outer mantle line of the clutch hub is mounted, said tread 707 is arranged in the axial direction below the axial splines between ZMS output flange 707 "and clutch hub 700.

The output disk carrier 708 of the outer multi-plate clutch K1 and the associated output flange are also largely formed corresponding to the output disk carrier 13 and the output flange 14 according to the embodiment of Figure 1. Furthermore, the input cam carrier of the radially inner multi-disc clutch K2 is largely formed according to the input cam carrier 18 of the multi-disc clutch K2, wherein between the input disc carriers of the multi-plate clutches K1 and K2 in the embodiment of Figure 12 a differently shaped connecting plate 709 is used in contrast to the connecting plate 17 of Figure 1 , This connecting plate 709 is substantially planar and comprises tabs 709A, which have been stamped out of the connecting plate 709, which are used as Abstützfinger for the return spring 710 of the pressure pot 711 of the radially inner multi-disc clutch K2. In the embodiment of Figure 7 and Figure 8, the connecting plate 214 also included a cylindrical neck portion, which was used as a guide for the pressure pot of the clutch K2. This cylindrical neck region is omitted in the exemplary embodiment according to FIG. 12, wherein a guide takes place over the cylindrical end region of the essentially flat connecting plate. In the embodiment according to FIG. 7 and FIG. 8, the cylindrical neck region has likewise been used as a support point for the return spring. used the pressure pot of the outer clutch K1. Instead of this cylindrical neck region, an annular element 712 is provided, which is supported on the connecting plate 709 and which is radially centered via a locking ring 713 on the input disk carrier of the inner clutch K2 and which in addition to a cylindrical portion has a radially extended portion on which the return spring 713 of Pressure pot 714 of the outer clutch K1 is supported. Between the return spring 713 and pressure pot 714 and between the return spring 710 and the pressure pot 711 of the clutch K1 and K2 round wire spring elements are arranged, against which the respective end region of the springs is supported.

Comparable to the exemplary embodiment according to FIG. 7, the housing 715 of the CSC is radially centered on the bell base 705 via an axially extended projection 715A and is clamped axially on the bell base via a component 716 which functions correspondingly to a clamping claw / sheet metal claw.

The cover bearing 717 is attached to the CSC housing 715 via a round wire clamping ring in conjunction with a bevel formed on the bearing inner ring in the axial direction to produce an internal power flow of the actuating force, go where in the embodiment of Figure 7, a snap ring is used with a rectangular cross-section.

No additional radial bearing point is provided between the CSC housing 715 and the hollow shaft 718.

The construction according to FIG. 12 comprises in summary the following features:

1. The first game point in the moment flow is located after the disk set of the outer clutch K1. Because this point of play lies after the friction system, no rattling noises occur during operation.

2. The return springs are supported by an open or closed round wire ring. This results in a better rolling behavior of the spring when operating the clutch resulting in a reduced basic hysteresis of the actuation system.

3. The return spring of the outer clutch K1 is supported via a circumferential ring formed on the traction pot, which is centered on the retaining ring of the outer disk carrier of the inner clutch. On the connecting plate or web, which connects the input disk carrier of the two couplings with each other, there are several fingers on the inner diameter, against which the return spring of the inner clutch is supported.

For centering the axial needle bearings (alternatively also sliding disks), nubs are extruded from the sheet metal (at least 3).

The cover bearing of the coupling, which is centered on the bearing inner ring on the CSC, supports the axial actuation force via a snap ring on the CSC. This snap ring can have a rectangular or round cross-section. When using a round wire snap ring, lower voltage spikes occur in the CSC than with the use of rectangular snap rings.

The annular pistons of the CSC have clearance (except for the piston seals) to the CSC housing and the ratio of piston guide length to piston inner diameter is less than 0.5. Thus, the piston in the housing can not only be moved axially but also tilt and thus assumes a cardanic function. If, due to tolerances and in operation due to dynamic effects, the clutch tilts relative to the CSC, the pistons of the CSC compensate for or follow this tilt.

The cooling oil is supplied to the clutch between the output disk carriers of the clutch. The oil flows through a pressure piece, which has radially extending grooves. Subsequently, the oil flows through the openings in the inner disk carrier of the inner clutch and then enters the pressure chamber of the inner clutch.

The input disk carrier of the outer clutch and the output disk carrier of the two partial clutches are spaced apart by means of axial needle bearings (or start-up or sliding disks). When using needle roller bearings, an axial minimum preload must prevail for trouble-free operation. This is generated by a corrugated or compression spring which is located between the hub of the inner clutch and a locking ring or shoulder of the outer transmission input shaft and supported. The biasing spring may be different than shown in Fig. 12 also on the inner diameter of the hub, as shown in connection with, for example, Fig. 7.

The thrust bearing for spacing the output sipe carriers is supported via a shoulder which is integrated in the hub of the outer clutch. 11. The thrust bearing between the outer disk carrier of the outer clutch K1 and the clutch cover (the wet space separation) is not functionally required because the preload of the wave spring can also be absorbed via the cover bearing of the clutch, as shown and described below in connection with FIG.

In Fig. 13, an embodiment of another double wet clutch is shown with a dry DMF, wherein the thrust bearing between the outer disk carrier of the outer clutch K1 and the clutch cover is omitted, since this is not functionally required, as explained in the preceding paragraph. Otherwise, the embodiments according to FIGS. 12 and 13 coincide with one another.

14 shows an exemplary embodiment of a further double wet clutch with internally shot power flow and wet running DMF and centrifugal pendulum ("FKP") .This exemplary embodiment has very great correspondences with the exemplary embodiment according to FIGS. 4 to 6, so that the following explanations only to limit the differences between these embodiments.

The exemplary embodiment according to FIG. 14 comprises a CSC housing 800, which comprises an axial projection 801, via which CSC housing 800 is radially centered in the bell base 802, wherein no further radial bearing location is provided between CSC housing 800 and transmission input shaft 803. Axially, the CSC housing 800 is clamped axially against the bell bottom 802 via an element 804 (which includes a radially outer screw connection 805) corresponding to a clamping claw / sheet metal claw. On an outer circumferential surface of the CSC housing 800, a snap ring with a round cross section 806 is provided, which serves as a bearing surface for a bearing inner ring of the cover bearing 807. The cover bearing 807 is connected via the tension pot 808 to the input disk carrier of the clutch K1, which is connected via a connecting plate to the input disk carrier of the clutch K2. The clutches K1 and K2 are actuated by substantially rigid pressure pots with a lever ratio with a lever ratio of 1: 1, wherein between the pressure pots and the piston-cylinder units of the CSC actuation bearings and shims are arranged, the characteristics of the input disk carrier and the output disk carrier of the Couplings K1 and K2 and the Betätigungsstöpfe, shims and actuator bearing correspond to those described in connection with Figure 4. In this case, however, the output disk carrier 809 of the radially inner multi-plate clutch differs in its construction from the output disk carrier 45 of the clutch K2 according to FIG. 4, as explained below:

The output disk carrier 809 comprises, in addition to the cylindrical part with axial splines for attaching the individual disks, a radially extended part as connection to the connecting flange 810, which connects the output flange 809 to the hollow transmission input shaft 803 via an axial spline. In the embodiment of Figure 14, this radially extending portion is arranged on the motor side of the disk set, whereas in the embodiment of Figure 4, the radially extending portion is arranged on the transmission side of the disk set. In addition, the output disk carrier 809 comprises an opening 811 through which cooling oil can flow to the disk set of the clutch K2. In order to be able to guide the cooling oil flow, a sheet 812 is provided, which is arranged between the connecting flange 810 and the cylindrical part of the outlet disk carrier 809.

With regard to the remaining features of this embodiment, reference is again made to FIG. 4 and the description there.

15 shows an exemplary embodiment of a further double wet clutch with internally shot power flow and wet running DMF and centrifugal pendulum ("FKP"), wherein the sheet metal clamp or clamping claw 804 according to FIG. 14 has been dispensed with. A preload for sealing the connection between CSC Housing and bell base can also be achieved, for example, via an appropriate choice of bias in the axially acting friction springs in the DMF and / or in the built disk carrier and / or in the connecting plates between the crankshaft and ZMS / clutch input side.

In the above, the present invention has been described solely in connection with

Multiple coupling device described, it being noted that the invention, in particular the use of a unit assembly of coupling and actuator and a clamping claw / Blechpratze, also in conjunction with a single clutch is used.

Claims

claims

Coupling device for a drive train with a drive unit and a subsequently arranged gear, with at least one, preferably two multi-plate clutches, each having an input-side and an output-side plate carrier and alternating in the axial direction lamellae, and with an actuating device, wherein the multi-plate clutch with the actuating device or The multi-plate clutches are connected to their actuators via a cover bearing to form a structural unit, and wherein a housing of the actuating device / the actuating devices is biased against the clutch bell axially via a clamping element which absorbs forces and moments arising during operation.

Coupling device according to claim 1, wherein the housing of the actuating device / the actuating means has an axial projection or a recess, via which the assembly of coupling and actuating device is radially supported in the clutch bell gear side and wherein a further radial support via a floating bearing is provided between a clutch input hub and one of the transmission input shafts.

Coupling device according to claim 1 or 2, characterized in that the multi-plate clutches are arranged radially one above the other and the input-side plate carrier of the radially outer multi-plate clutch on the housing of the actuating device via the support plate or the support pot radially rotatable but axially fixed, so that a force flow one of The actuating force generated by the actuating device is supported on the housing of the actuating device via the axially fixed support of the radially outer input-side disk carrier and a force flow which is closed within the coupling device is present.

Coupling device for a drive train with a drive unit and a subsequently arranged transmission, with at least one, preferably two multi-plate clutches, each having an input-side and an output-side plate carrier and axially alternating lamellae, and having an actuating device, wherein the multi-plate clutch and the multi-plate clutches and the actuating device are connected to one another via a cover bearing, wherein a fixed bearing is arranged between a clutch input hub and one of the transmission input shafts, wherein between a housing of the actuator and one of the transmission input shafts an exclusively radially acting bearing is arranged and between the housing of the actuating device and the bell bottom an axially flexible torque support is provided.

5. Coupling device according to claim 4, wherein axially aligned or radially aligned pipe connections are provided, which connects a transmission-side hydraulic medium supply with the actuating device.

6. Coupling device for a drive train with a drive unit and a subsequently arranged transmission, with at least one, preferably two multi-plate clutches each having an input-side and an output-side plate carrier and axially alternating lamellae, and with an actuating device, wherein the multi-plate clutch or the multi-plate clutches and the actuating device are connected to one another via a cover bearing, wherein between a clutch input hub and one of the transmission input shafts an exclusively radially acting bearing is arranged, and wherein between a housing of the actuator and one of the transmission input shafts a radial support exclusively via a flexplate on Bell bottom is provided.

7. Coupling device according to claim 6, wherein between the clutch input hub and a crankshaft, a pilot bearing is provided.

8. Coupling device for a drive train with a drive unit and a subsequently arranged transmission, with at least one multi-plate clutch having an input-side and an output-side plate carrier and axially alternating lamellae, and with an actuating device, wherein an input disc carrier of the multi-plate clutch and a housing of the Actuating device are connected to each other via a tension pot to form a unit, wherein the Zugtopf is axially fixed on the input disk carrier via a radially outer circlip, wherein the Zugtopf comprises an axial projection, the retaining ring in the assembled state of the coupling device due to the bias of the return spring and the actuating force at least partially radially overlaps, so that a rising of the retaining ring is avoided under speed.

9. Multiple coupling device for a drive train with a drive unit and a subsequently arranged transmission, with two radially nested multi-plate clutches, each having an input-side and an output-side plate carrier and axially alternating lamellae, and having an actuating device, wherein the multi-plate clutches and the actuators are connected via a cover bearing with each other to form a structural unit, wherein a spring element is arranged between an output disk carrier of the radially inner multi-plate clutch and a transmission input shaft connected thereto, wherein between the output disk carrier of the radially inner multi-plate clutch and an output disk carrier of the radially outer multi-plate clutch, a first thrust bearing, if necessary in connection with a spacer element, wherein the one output disk carrier of the radially outer multi-plate clutch and a Einga ngslamellenträger the radially outer multi-plate clutch another thrust bearing is arranged, wherein between the input disk carrier of the radially outer multi-plate clutch and a clutch cover another thrust bearing is arranged, and wherein the clutch cover is axially fixed to the bell bottom.

10. Multiple coupling device for a drive train with a drive unit and a subsequently arranged transmission, with two radially nested multi-plate clutches, each having an input-side and an output-side plate carrier and axially alternating lamellae, and having an actuator, wherein the multi-plate clutches and the actuators are connected via a cover bearing with each other to form a structural unit, wherein a spring element is arranged between an output disk carrier of the radially inner multi-plate clutch and a transmission input shaft connected thereto, wherein between the output disk carrier of the radially inner multi-plate clutch and an output disk carrier of the radially outer multi-plate clutch, a first thrust bearing, if necessary in connection with a spacer element, wherein the one output disk carrier of the radially outer multi-plate clutch and a Eing An axial bearing is arranged on the disk carrier of the radially outer multi-plate clutch, and wherein a housing of the actuating device on the clutch bell is preloaded axially via a tensioning element which absorbs forces and moments during operation.