DE102005037514A1 - Torque transmission unit in drive train of motor vehicle has intermediate pressure plate installed between friction linings of respective clutch plates and in radial direction mounted on at least one transmission input shaft - Google Patents

Abstract

The invention relates to a torque transmission device in the drive train of a motor vehicle for torque transmission between a drive unit, in particular an internal combustion engine, with an output shaft, in particular a crankshaft, and a transmission with at least two transmission input shafts, each rotatably connected to a clutch disc having friction linings, wherein between the friction linings a clutch disc and the friction linings of the other clutch disc an intermediate pressure plate is arranged, which is non-rotatably connected to the output shaft of the drive unit, wherein the friction linings of the clutch discs between the intermediate pressure plate and pressure plates are arranged by means of an actuator in relation to the transmission input shafts, axial Direction are movable relative to the intermediate pressure plate to clamp the friction linings between the intermediate pressure plate and the pressure plates.
In order to improve the storage of the double clutch, the intermediate pressure plate is mounted in the radial direction on one of the transmission input shafts.

Description

The The invention relates to a torque transmission device in the drive train a motor vehicle for transmitting torque between a drive unit, in particular an internal combustion engine, with an output shaft, in particular a crankshaft, and a transmission, with at least two Transmission input shafts, each having a friction linings Clutch disc are rotatably connected, wherein between the friction linings of the a clutch disc and the friction linings of the other clutch disc an intermediate pressure plate is arranged, which is non-rotatably connected to the output shaft the drive unit is connected, wherein the friction linings of the clutch discs are arranged between the intermediate printing plate and printing plates, with the help of an actuator in, relative to the transmission input shafts, relative to the axial direction to the intermediate pressure plate are movable to the friction linings between pinch the intermediate pressure plate and the pressure plates.

The both clutch discs and the cooperating pressure plates form a double clutch. In conventional torque transmission devices with a double clutch proves the storage of the double clutch often as complicated.

task The invention is a torque transmission device according to the preamble of Claim 1 to create, by which the storage of the double clutch is improved.

The Task is with a torque transmission device in the drive train of a motor vehicle for torque transmission between a drive unit, in particular an internal combustion engine, with an output shaft, in particular a crankshaft, and a Transmission, with at least two transmission input shafts, each with a friction lining having clutch disc rotatably connected, wherein between the friction linings one clutch disc and the friction linings of the other clutch disc an intermediate pressure plate is arranged, which is non-rotatably connected to the output shaft the drive unit is connected, wherein the friction linings of the clutch discs are arranged between the intermediate printing plate and printing plates, with the help of an actuator in, relative to the transmission input shafts, relative to the axial direction to the intermediate pressure plate are movable to the friction linings between pinching the intermediate printing plate and the printing plates, thereby solved, that the intermediate pressure plate in the radial direction at least at one the transmission input shafts is mounted. This will make a stiff and compact storage for created the double clutch. The intermediate pressure plate can directly or indirectly for example about a substantially tubular Hub part, be mounted on one of the transmission input shafts.

One preferred embodiment the torque transmitting device Is characterized in that the intermediate pressure plate by means of a Bearing device, in particular a radial bearing, on one of Transmission input shafts, in particular on an internally hollow transmission input shaft, is mounted, in which a further transmission input shaft rotatable is arranged. The storage can, for example, by a rolling bearing or a sliding bearing.

One Another preferred embodiment the torque transmitting device is characterized in that at one of the transmission input shafts, in particular on the further transmission input shaft, one of the clutch plates releasably, the is called destructively separable, fastened. At the bearing for the intermediate pressure plate acts for example, a support bearing, that during assembly of the double clutch to one on the hollow transmission input shaft provided bearing seat pushed and with a retaining ring in Axial direction is fixed. Subsequently, then one of the clutch discs attached to the other transmission input shaft.

One Another preferred embodiment the torque transmitting device characterized in that at one of the transmission input shafts, in particular on the further transmission input shaft, attached clutch disc executed in two parts is. The engine side attached to the other transmission input shaft Clutch disc obstructs access to the circlip. By the two-part design the access to the storage of the intermediate pressure plate is facilitated.

One Another preferred embodiment the torque transmitting device characterized in that at one of the transmission input shafts, in particular on the further transmission input shaft, attached clutch disc a hub part from which an inner flange ring originates, the solvable, this means non-destructively separable, on an outer flange ring is attached to the radially outside friction linings are attached. The radi al outer flange ring is preferably installed on the transmission side in the double clutch during assembly. The radially inner flange ring with the hub part becomes the double clutch loose and only after the attachment of the circlip assembled.

One Another preferred embodiment the torque transmitting device is characterized in that the two flange rings by at least a screw connection are connected together. advantageously, Be the two flange over centered a centering seat. The two flange rings can for Example over a toothing form-fitting be connected to each other. Preferably, the two flange parts or flange by at least one snap connection releasably with each other connected.

One Another preferred embodiment the torque transmitting device is characterized in that one of the transmission input shafts is formed as a hollow shaft, in which the further transmission input shaft is rotatably disposed, wherein between the two transmission input shafts a substantially tubular Hub part with a drive-side and a transmission-side End is rotatably disposed, wherein at the drive-side end the hub part, the intermediate pressure plate is attached. The attachment is preferably done by riveting. The attachment of the intermediate pressure plate but at the hub part can also by crimping or by a centering seat done with a circlip.

Further preferred embodiments of Torque transfer device are characterized in that the hub part in the area of his transmission-side end in the hollow shaft within the hollow shaft mounted on the hollow shaft or on the other transmission input shaft is. The bearing may be by a rolling bearing, preferably a needle bearing, or by a plain bearing. For lubrication, the bearing with the oil room connected to the transmission or with its own, self-contained sealed Be equipped grease lubrication. The rigidity of the storage is preferably designed so that the natural frequency of the tilting vibration-related to the first order - above the driving range.

One Another preferred embodiment the torque transmitting device Is characterized in that the intermediate pressure plate in the axial Direction is supported on one of the transmission input shafts. As a result, the actuating forces acting in the axial direction of the double clutch no longer transferred to the crankshaft.

One Another preferred embodiment the torque transmitting device is characterized in that the double clutch pre-assembled in a clutch housing is. The coupling housing is also referred to as a clutch bell. The accessibility The pre-assembly points, for example, by appropriate Durchgriffsmöglichkeiten in the drive-side clutch disc of the double clutch allows.

One Another preferred embodiment the torque transmitting device is characterized in that the bearing of the preassembled Double clutch in the area or near the center of gravity of the double clutch is arranged. By this arrangement of the bearing or Bearing device of the intermediate pressure plate assembly and the transport of the pre-assembled double clutch simplified.

One Another preferred embodiment the torque transmitting device is characterized in that one of the transmission input shafts is formed as a hollow shaft, in which the further transmission input shaft is rotatably disposed, wherein the intermediate pressure plate with the help a bearing device directly on one of the transmission input shafts, in particular at the further transmission input shaft, is mounted. At the drive end of the other transmission input shaft can an additional Pilot camp for provided the further transmission input shaft in the output shaft be.

One Another preferred embodiment the torque transmitting device is characterized in that one of the transmission input shafts is formed as a hollow shaft, in which the further transmission input shaft is rotatably disposed, wherein the intermediate pressure plate with the help a bearing device is mounted on a hub bearing part, the solvable this means destructively separable, at the drive end of the further transmission input shaft is attached. The attachment of the hub bearing part can, for example with the help of a screw that fits into a corresponding threaded hole in the Driven drive end of the other transmission input shaft is.

One Another preferred embodiment the torque transmitting device is characterized in that one of the clutch discs rotatably is connected to the hub bearing part. Through the hub bearing part is allows that both clutch discs have the same hub geometry. At the drive end of the hub bearing part, an additional Pilot camp for provided the further transmission input shaft in the output shaft be.

A further preferred exemplary embodiment of the torque transmission device is characterized in that the bearing device comprises a bearing outer ring, which is fastened radially inward on the intermediate pressure plate, and / or a bearing inner ring, which is fastened radially on the outside of the associated transmission input shaft. Camps Device is preferably designed as angular contact ball bearings, for example as deep groove ball bearings. The bearing outer ring can also be integrated in the intermediate pressure plate. Between the bearing outer ring and the bearing inner ring rolling elements are arranged in a known manner.

One Another preferred embodiment the torque transmitting device is characterized in that the bearing inner ring has a support portion has, the radially inside so on one of the transmission input shafts is postponed that the transmission-side end of the support section abuts against a shoulder on the associated transmission input shaft is trained. The support portion has substantially the shape a circular cylinder jacket. Radially outside forms the support section a contact surface for the Rolling elements of the Storage facility. Instead of the paragraph can also be a circlip in the axial direction at the associated Be fixed transmission input shaft.

One Another preferred embodiment the torque transmitting device is characterized in that from the drive end of the Carrying section emanating from a mounting portion to which a retaining ring solvable this means destructively separable, fastened. The attachment portion extends essentially in the radial direction. The retaining ring is preferably with the help of at least one screw on the attachment portion attached.

One Another preferred embodiment the torque transmitting device is characterized in that the retaining ring by means of at least a screw connection to the mounting portion of the bearing inner ring is attached. The screw connection is, for example, through a corresponding opening in the associated Drive-side clutch disc, accessible during assembly.

One Another preferred embodiment the torque transmitting device Is characterized in that the retaining ring radially inside a Fixing portion, which, depending on the screwed state the screw, so a closing force on a locking ring exerts the locking ring engages in an annular groove in the associated transmission input shaft is provided. This will in a simple way an axial Fixation of the bearing device on the associated transmission input shaft allows.

One Another preferred embodiment the torque transmitting device is characterized in that the locking ring is slotted and is biased so that it is on the associated transmission input shaft can be plugged. Only when the screw is tightened, the biasing force of the locking ring is overcome to this in axial To fix direction in the ring groove.

One Another preferred embodiment the torque transmitting device characterized in that the bearing outer ring, the bearing inner ring, the retaining ring and / or the locking ring are formed from sheet metal. This allows the Manufacturing costs are reduced.

One Another preferred embodiment the torque transmitting device is characterized in that between the output shaft of the Drive unit and the dual clutch a torsional vibration damping device, in particular a dual mass flywheel, is connected, the damper input part, the non-rotatably connected to the output shaft of the drive unit is, and a damper output part that is solvable, that is called destructively separable, is connected to a dual clutch housing part, on which attached the intermediate pressure plate. The detachable connection is preferably a form-fitting, axial plug connection, especially with complementary trained gears. The input part of the vibration damping device is centered on the crankshaft. The double clutch is on one of the Transmission shafts centered. A possible offset in Radial direction can at the contact point between the output part the vibration damping device and the energy storage, in particular bow springs, the vibration damping device respectively. The preferably designed as a plug connection plug connection guaranteed a sufficient axial mobility of the double clutch relative to the vibration damping device. This simplifies assembly. The primary parts or input parts of the Vibration damping device can be pre-assembled on the crankshaft. In addition, occurring during operation axial oscillations of the crankshaft are not transmitted to the clutch.

One Another preferred embodiment the torque transmitting device is characterized in that between the dual clutch housing part and the damper output part a spring means is biased by the damper output part is pressed against a friction / sliding device which is between the Damper input part and the damper output part is arranged. The spring device is preferably around a plate spring. The friction / sliding device is either on the damper input part or at the damper output part attached.

One Another preferred embodiment the torque transmitting device is characterized in that the damper output part at its Inner side radially within the friction / sliding a recess for receiving a portion of the dual clutch housing part. This creates a stable, non-rotatable connection between the through ensures the connector connected parts.

One Another preferred embodiment the torque transmitting device is characterized in that the dual clutch housing part is formed of sheet metal and having a flange portion, the Attachment of the double clutch housing part to the intermediate pressure plate serves. Preferably, the flange portion comprises a plurality of feet with through holes for Carry out of fasteners, such as screws or rivets.

One Another preferred embodiment the torque transmitting device is characterized in that the dual clutch housing part has an external gear area, the one-piece with the flange area and complementary to an internal toothing is formed, which is provided radially inwardly of the damper output part is. By the complementary trained gearing becomes a simple way non-rotatable connector between the dual clutch housing part and the output part of the vibration damping device allows.

One Another preferred embodiment the torque transmitting device is characterized in that the external toothing region in radial Direction between the inner diameter and the outer diameter the friction linings the adjacent clutch disc is arranged. This arrangement has been found in the context of the present invention to be particularly advantageous.

One Another preferred embodiment the torque transmitting device is characterized in that radially within the outer toothing region a stiffening edge is formed on the double-clutch housing part. alternative could for reinforcement also inside a further part are inserted.

One Another preferred embodiment the torque transmitting device is characterized in that the damper output part substantially has the shape of a circular disk formed of sheet metal, at the radially inside an internal toothing and radially outside at least a driver finger or Mitnehmerarm is formed in a Energy storage device of the torsional vibration damping device engages. The internal teeth can be formed continuously. The internal toothing but also for reinforcement Have areas without teeth in the circumferential direction to the deformation behavior of the dual clutch housing part to improve. The damper output part can be formed in one or more parts.

One Another preferred embodiment the torque transmitting device is characterized in that on the damper output part radially outwardly diametrically oppositely formed two driving fingers or driving arms are. Thereby, a sufficient function of the torsional vibration damping device guaranteed.

One Another preferred embodiment the torque transmitting device is characterized in that in the region of the driver fingers in the damper output part in each case a radially extending slot is formed. The slots serve to make the output part elastic. This is it is possible the connection between the damper output part and the dual clutch housing part to pretension in assembled condition.

Further Advantages, features and details of the invention will become apparent the following description, with reference to the drawing various embodiments are described in detail. It can in the claims and Characteristics mentioned in the description each individually for itself or in any combination essential to the invention. It demonstrate:

1 a torque transmitting device with a two-part clutch disc in longitudinal section;

2 the torque transmission device 1 during assembly of the split clutch disc;

3 the torque transmission device 1 before installing a torsional vibration damping device;

4 a torque transmission device with a so-called on-tube mounting in longitudinal section;

5 a torque transmission device with a so-called in-tube mounting in longitudinal section;

6 a torque transmitting device with a supported in the axial direction on one of the transmission input shafts intermediate pressure plate during assembly in longitudinal section;

7 a similar torque transmitting device as in 6 in the assembled state;

8th a similar representation as in 7 wherein the intermediate pressure plate is mounted on a hollow gear shaft;

9 another embodiment in which the intermediate pressure plate is mounted on a hub bearing part which is fixed to the end of one of the transmission input shafts;

10 a further embodiment in which the storage of the intermediate pressure plate is offset towards the drive;

11 an enlarged section 8th ;

12 a perspective view of a damper output member which is attachable to a coupling housing part;

13 an enlarged section 12 ;

14 a damper output part according to another embodiment in plan view;

15 a damper output member in a slotted variant;

16 a damper output part in a two-part design and

17 a torque transmitting device according to another embodiment, in which the clutch discs of the dual clutch are each coupled via a separate damper with the associated transmission input shaft.

In 1 is part of a powertrain 1 a motor vehicle shown. Between a drive unit 3 , in particular an internal combustion engine, of which a crankshaft 4 goes out, and a gearbox 5 is a double clutch 6 arranged. Between the drive unit 3 and the double clutch 6 is a vibration damping device 8th connected. In the vibration damping device 8th it is a dual mass flywheel.

The crankshaft 4 the internal combustion engine 3 is about screw connections 9 . 10 fixed to an entrance section 11 the torsional vibration damping device 8th connected. The entrance part 11 the torsional vibration damping device 8th has substantially the shape of a radially extending annular disc, which forms a vibration damper cage radially outward. At the entrance 11 is radially outside a starter tooth wreath 12 attached. In the vibration damper cage is at least one energy storage device, in particular a spring device 16 , at least partially included. In the spring device 16 engages a starting part 18 the vibration damping device 8th one. Between the entrance part 11 and the output part 18 is a sliding / friction ring 19 arranged at the entrance part 11 is attached. Between the starting part 18 and a coupling housing part 22 is a plate spring 20 so biased that the output part 18 the torsional vibration damping device 8th against the sliding / friction ring 19 is pressed.

Radial inside is the starting part 18 the torsional vibration damping device 8th detachable, that is non-destructively separable, with the coupling housing part 22 connected. On the coupling housing part 22 is by means of riveted joints, of which in the sectional view only one riveted joint 24 you can see an intermediate printing plate 26 attached. Drive side are between the intermediate pressure plate 26 and a printing plate 28 friction linings 29 a first clutch disc 31 clamped. The first clutch disc 31 is over a hub part 33 rotatably with a first transmission input shaft 35 connected, which is designed as a solid shaft. The first transmission input shaft 35 is in a second transmission input shaft 36 , which is designed as a hollow shaft, rotatably arranged. At the drive end of the second transmission input shaft 36 is with the help of a rolling bearing 37 a hub part 38 rotatably mounted on the radially outside of the intermediate pressure plate 26 is appropriate. Transmission side are between the intermediate pressure plate 26 and a printing plate 39 friction linings 40 a second clutch disc 42 clamped. The second clutch disc 42 is over a hub part 43 rotatably with the second transmission input shaft 36 connected.

The double clutch 6 has a coupling housing 44 on, on which the printing plates 28 . 39 axially slidably mounted rotationally fixed. In addition, the intermediate pressure plate 26 on the clutch housing 44 attached. The coupling housing 44 is over the coupling housing part 22 and the torsional vibration damping device 8th with the crankshaft 4 connected. The double clutch 6 is in a known manner via actuators 46 . 47 using operating levers 48 . 49 interact, operated.

In 2 is the double clutch 6 shown during assembly. The second clutch disc 42 and the hub part 38 with the intermediate pressure plate 26 as well as the rolling bearing 37 are pre-assembled on the gearbox side. You can also see in 2 in that the first clutch disc 31 an inner flange ring 51 at the hub part 33 attached, and an outer flange ring 52 includes, on which the friction linings 29 are attached. In 2 are the friction linings 29 with the outer flange ring 52 as well as the printing plate 28 pre-assembled on the drive side. The hub part 33 with the inner flange ring 51 the first clutch disc 31 is not mounted yet. In this condition, a retaining ring 55 for axial fixation of the rolling bearing 37 at the transmission-side end of the second transmission input shaft 36 be attached. Then then the hub part 33 be attached with the inner flange on the outer flange ring.

In 3 is the first clutch disc 31 shown in the assembled state. In a next assembly step then the connection between the coupling housing part 22 and the output part 18 the torsional vibration damping device 8th produced.

In 4 is part of a powertrain 61 a motor vehicle shown. Between a drive unit 63 , in particular an internal combustion engine, of which a crankshaft 64 goes out, and a gearbox 65 is a double clutch 66 arranged. The crankshaft 64 the internal combustion engine 63 is about screw connections 68 rotatable with a so-called flex plate 70 connected. Radial outside is on the flex plate 70 a starter ring gear 71 attached. On the starter ring gear 71 are several wings 72 attached by a carrier sheet 73 out. The carrier sheet 73 is fixed to the crankshaft 64 connected. About screw connections 75 is on the carrier sheet 73 radially outside an intermediate pressure plate 78 and a coupling housing part 79 attached.

Drive side are between the intermediate pressure plate 78 and a printing plate 88 friction linings 89 a first clutch disc 91 clamped. The first clutch disc 91 is with the interposition of a torsional vibration damping device 92 with a hub part 93 coupled, the non-rotatably with a first transmission input shaft 95 connected is. The first transmission input shaft 95 is designed as a solid shaft and rotatable in a second transmission input shaft 96 arranged, which is designed as a hollow shaft.

With the help of a needle bearing 97 is a tubular hub part 98 rotatable on the first transmission input shaft 95 stored. The tubular hub part 98 is between the two transmission input shafts 95 and 96 arranged. Drive side, the tubular hub part 98 a conically widening area on the radially outward by means of riveted joints 99 the intermediate printing plate 78 is attached.

Transmission side are between the intermediate pressure plate 78 and a printing plate 100 friction linings 101 a second clutch disc 102 clamped. The second clutch disc 102 is via a torsional vibration damping device 103 with a hub part 104 coupled, the non-rotatably with the second transmission input shaft 96 connected is.

The two printing plates 88 and 100 are in a known manner with the help of actuators 106 . 107 and operating levers 108 . 109 in the axial direction relative to the intermediate pressure plate 78 movable. The bearing and torque transmission from the crankshaft 64 on the double clutch 66 via the carrier plate 73 and the flex plate 70 , The tubular hub part 98 is radially between the two transmission input shafts 95 and 96 arranged the dual clutch transmission.

At the in 5 illustrated embodiment is a similar torque transmitting device as in 4 , To denote the same parts, the same reference numerals are used. To avoid repetition, the preceding description of the 4 directed. In the following, only the differences between the two embodiments will be discussed.

At the in 4 embodiment shown is the tubular hub part 98 on the full wave 95 stored. At the in 5 illustrated embodiment is the tubular hub part 98 in the hollow shaft 96 stored, with the help of a needle bearing 117 ,

In the in the 1 to 5 illustrated embodiments, the engagement force is based on the operation of the dual clutch on the crankshaft. To increase the rigidity is the carrier sheet 73 at the in the 4 and 5 illustrated embodiments preferably formed with conical surfaces and has air holes to a good cooling of the double clutch 66 to ensure. To increase the rigidity has the tubular hub part 98 in the transition region of the intermediate pressure plate 78 the conical area. The tubular hub part 98 itself can be formed from an inductively curable, or usable deep-drawn sheet metal part or from a corresponding forging.

In 6 is a torque transmitting device shown in longitudinal section, which also as A clutch unit 140 referred to as. The clutch unit 140 includes a double clutch 150 that is a driving wave 151 , In particular, a crankshaft of a motor vehicle engine, with two drivable shafts 152 . 153 , in particular transmission input shafts, connect and disconnect from them. The double clutch 150 is about a vibration damper 154 with the vehicle engine, which is also referred to as an internal combustion engine, connectable. The crankshaft 151 in the damper 154 introduced torsional vibrations are thereby at least substantially filtered so that they at least not fully on the dual clutch 150 or on the transmission shafts 152 . 153 be transmitted.

Regarding the basic construction and the function of the damper 154 , which is part of a so-called dual-mass flywheel, or forms such a dual-mass flywheel, is on the DE-OS 197 28 422 , the DE-OS 195 22 718 , the DE-OS 41 22 333 , the DE-OS 41 17 582 and the DE-OS 41 17 579 directed. The damper 154 has an entrance part 155 , which has radially inner areas with the crankshaft 151 , for example by means of screws 156 , is firmly connected. The entrance part 155 is formed here by a sheet metal part, the radially outside another component 157 carries, which is also formed here by a sheet metal part. The two components 155 and 157 limit an annular chamber 158 , in which at least the energy storage, here in the form of coil springs 159 , At least one damper are included. The chamber 158 is preferably sealed at least radially outwardly and contains at least a small amount of viscous medium, which is preferably formed by a lubricant. That of the crankshaft 151 in the clutch unit 140 introduced torque is transmitted through the input part 155 . 157 on the energy storage 159 transferred and from there via a likewise to the energy storage 159 attacking output part 160 to the double clutch 150 forwarded. The starting part 160 is here formed by a flange-like component that enters the chamber 158 engages radially from the inside and over arms or fingers 161 with the end of the energy storage 159 interacts.

Between the entrance part 155 and the output part 160 is a sliding / friction ring 163 arranged at the entrance part 155 is attached. Between the starting part 160 and the component 157 is a plate spring 164 so biased that the output part 160 the torsional vibration damping device 154 against the sliding / friction ring 163 is pressed.

Radial inside is the starting part 160 the torsional vibration damping device 154 with an internal toothing 166 fitted. The internal toothing 166 of the starting part 160 is complementary to an external toothing 167 formed on a coupling housing part 168 is trained. The toothing is designed so that the torsional vibration damping device 154 with the starting part 160 on the coupling housing part 168 can be plugged in the axial direction. The coupling housing part 168 is through the connections 169 of which in the sectional view of the 6 only one rivet connection is shown on an intermediate pressure plate 170 attached. The intermediate printing plate 170 acts with printing plates 171 . 172 together, which are provided on the transmission side and drive side. Between the intermediate pressure plate 170 and the printing plate 172 are friction linings 173 can be clamped, the radially outward on a first clutch disc 174 are attached. The first clutch disc 174 is radially inward on a hub part 175 attached, the rotationally fixed to the transmission shaft 152 is attached, which is designed as a solid shaft.

The full wave 172 , which is also referred to as the first transmission input shaft, is in the second transmission input shaft 153 , which is designed as a hollow shaft, rotatably arranged. At the drive end of the second transmission input shaft 153 is a hub part 178 rotatably mounted on the radially outside a second clutch disc 179 is attached. At the second clutch disc 179 in turn, are radially outside friction linings 180 attached between the intermediate pressure plate 170 and the printing plate 171 can be clamped.

The trained as a solid shaft gear shaft 152 points between the hub part 175 and the hub part 178 a shaft section 181 on top of which a storage facility 183 for the intermediate printing plate 170 is mounted. The storage facility 183 includes a bearing outer ring 184 , which is radially inward on the intermediate pressure plate 170 is attached, and a bearing inner ring 185 located radially outward on the shaft portion 181 is arranged. Between the bearing inner ring 185 and the bearing outer ring 184 are rolling elements 186 , in the form of ball or rollers, arranged. The bearing inner ring 185 is in the axial direction by retaining rings 188 . 189 , which are in corresponding grooves of the solid shaft 152 are attached, fixed in the axial direction. The circlip 189 is formed slotted and is also referred to as a locking ring. Radially outside is on the bearing inner ring 185 with the help of a screw 190 a retaining ring 191 fastened, through which the lock ring 189 in its associated annular groove in the solid shaft 152 is fixed.

In 6 is the clutch unit 140 shown in pre-assembled state. The torsional vibration damping device 154 , which is also referred to as a dual mass flywheel, is on the crankshaft 158 preassembled. The double clutch 150 is with the help of the storage facility 183 on the gears input shaft 152 preassembled. The hub parts 175 . 178 are non-rotatable with the respective transmission shafts 152 . 153 connected. When mounting the storage facility 183 and especially the screw 190 for mounting and in particular for axial fixation of the bearing device 183 serves, through an opening 192 in the first clutch disc 174 accessible from outside. The axial fixation of the bearing device 183 between the circlips 188 . 189 on the shaft section 181 the transmission shaft 152 will with the help of the screw 190 and the retaining ring 191 reached. Due to the axial support of the intermediate pressure plate 170 on the gear shaft 152 becomes the power flow when the double clutch is actuated 150 closed. The transmission input shafts 152 . 153 are equipped on the transmission side with a helical toothing, which allows the absorption of axial forces. According to one aspect of the present invention, the output part becomes 160 of the dual mass flywheel 154 not centered by an additional warehouse. In accordance with another aspect of the present invention, the storage device is 183 in the area or in the vicinity of the center of gravity of the double clutch 150 arranged. As a result, a stable support of the double clutch 150 during transport and during assembly.

The double clutch 150 has a coupling housing 194 on, on which the intermediate printing plate 170 is attached. The printing plates 171 . 172 are non-rotatable, but axially displaceable on the clutch housing 194 appropriate. The coupling housing 194 can about the gearing 166 . 167 non-rotatable with the crankshaft 151 get connected. The double clutch 150 is in a known manner via actuators 196 . 197 operated with operating levers 198 . 199 interact.

At the drive end of the gear shaft 152 is a journal 201 formed into a blind hole 204 is receivable in the transmission-side end of the crankshaft 151 is trained. In the blind hole 204 is a needle bearing 206 arranged, which is also referred to as a pilot camp.

In 7 is a similar torque transfer device 140 as they are in 6 is shown, shown in the assembled state. For reasons of clarity, not all parts are provided with reference numerals. In the assembled state is the output part 160 of the dual mass flywheel 154 through its internal toothing 166 with the external teeth 167 of the coupling housing part 168 rotatably connected. The connection is also called axial plug connection 220 designated. When mounting the gearbox on the engine block, the connection of the double clutch 150 with the dual mass flywheel 154 over the spline 220 produced. This may be the output part 160 , the torsional vibration damping device 154 , which is also referred to as the output flange, on the coupling housing part 168 Center. A storage, in particular radial storage, between the input part 155 and the output part 160 of the dual mass flywheel 154 not necessary. Through the spline 220 an axial displacement is maintained, which ensures a decoupling of vibrations. The storage facility 183 lies favorably to the center of gravity of the double clutch 150 , In assembled state of the double clutch 150 is the journal 201 the transmission shaft 152 through the needle bearing 206 in the crankshaft 151 stored. The bearing is also referred to as pilot bearing and serves to improve the radial support of the coupling mass. The pilot bearing also causes a smaller radial offset of the gear shaft 152 to the crankshaft 151 reached.

In 8th a torque transmission device according to a further embodiment is shown. To denote the same parts, the same reference numerals are used as in the previous embodiments, wherein for reasons of clarity, the not relevant for understanding reference numerals in 8th be omitted. In the following, only the differences between the individual embodiments will be discussed.

At the in 8th illustrated embodiment, the intermediate pressure plate is not on the first transmission shaft 152 , which is designed as a solid shaft, but on the second gear shaft 153 stored, which is designed as a hollow shaft. The transmission hollow shaft 153 has a shaft section at its drive end 221 on top of which a storage facility 223 is mounted. The storage facility 223 has a bearing outer ring 224 on, the radially inside of the intermediate pressure plate 170 is attached. In addition, the storage facility 223 a bearing inner ring 225 on, the radially outward on the shaft portion 221 the transmission hollow shaft 153 is arranged. Between the bearing inner ring 225 and the bearing outer ring 224 are rolling elements 226 arranged.

The bearing inner ring 225 is the transmission side in the axial direction on a paragraph 228 fixed to the gear shaft 153 is appropriate. Drive side is the bearing inner ring 225 through a circlip 229 fixed, which is also referred to as a locking ring and in an annular groove in the transmission shaft 153 intervenes. Radial outside is on the bearing inner ring 225 with the help of a screw 230 a retaining ring 231 fastened, through which the lock ring 229 in the annular groove of the gear shaft 153 is pressed.

The transmission hollow shaft 153 is preferable mounted directly in a (not shown) gear housing. For the axial clutch support, it may therefore be advantageous, the double clutch on the hollow shaft 153 to fix. This ensures a lower axial play.

In 9 is a similar embodiment as in the 6 and 7 shown. To denote the same parts, the same reference numerals are used. To avoid repetition, the preceding description of the 6 and 7 directed. In the following, only the differences between the exemplary embodiments will be discussed.

At the in 9 illustrated embodiment, the coupling housing part 168 radially further inwardly drawn than in the previous embodiments. The internal toothing 166 of the starting part 160 of the torsional vibration damper 154 as well as the external toothing 167 of the coupling housing part 168 are in the range of the inner diameter of the friction linings 173 . 180 the double clutch 150 arranged.

In addition, at the in 9 illustrated embodiment, the hub part 175 not directly on the gearbox main shaft 152 but on a hub bearing part 235 stored. The hub bearing part 235 has substantially the shape of a circular cylindrical shell portion, which has the same outer diameter as the hollow shaft transmission 153 having. At the drive end of the hub bearing part 235 is a bearing sleeve 236 provided, which has a smaller outer diameter than the hub bearing part 235 having. The bearing sleeve 236 is with the help of a needle bearing 237 , which is also referred to as a pilot camp, in a holding body 238 rotatably mounted, with the help of screws 156 on the crankshaft 151 is attached.

The circular cylindrical shell section of the hub bearing part 235 is also used as a fixing section 239 designated. The attachment section 239 of the hub bearing part 235 is radially outward rotation with the hub part 175 the first clutch disc 174 connected. The hub bearing part 235 is with the help of a screw 241 Full wave at the drive end of the transmission 152 attached. The attachment section 239 of the hub bearing part 235 has at its gear-side end a paragraph 242 on. By the paragraph 242 becomes a storage facility 243 for the intermediate printing plate 170 in the axial direction on the gearbox main shaft 152 fixed. The storage facility 243 includes a bearing outer ring 244 , which is radially inward on the intermediate pressure plate 170 is attached. In addition, the storage facility includes 243 a bearing inner ring, the radially outward on the transmission-side end of the hub bearing part 235 is mounted. The bearing inner ring 245 rests in the axial direction on the paragraph 242 from. Between the bearing inner ring 245 and the bearing outer ring 244 are rolling elements 246 arranged.

The storage facility 243 can on the hub bearing part 235 preassembled and thus axially fixed. When mounting the double clutch 150 in a clutch bell 247 becomes the hub bearing part 235 on the drive-side end of the transmission full wave 152 postponed. The screw 241 for axially fixing the hub bearing part 235 at the gearbox full wave 152 is easy to reach during assembly. The axial support of the coupling force is on the paragraph 242 at the hub bearing part 235 reached.

Due to the non-rotatable connection of the hub part 175 with the hub bearing part 235 is also about this part, the torque transmission between the clutch disc 174 and the gearbox full wave 152 reached. It is particularly advantageous that the two clutch discs 174 . 179 due to the outer diameter of the attachment portion 239 can have the same hub geometry.

In 10 is a similar embodiment as in the 6 and 7 shown. To denote the same parts, the same reference numerals are used. To avoid repetitions, the preceding description of the 6 and 7 directed. In the following, only the differences between the individual embodiments will be discussed.

At the in 10 illustrated embodiment is on the intermediate pressure plate 170 a coupling housing part 248 attached, which extends radially inwardly than in the previous embodiments. Radially outside is the coupling housing part 248 with the help of riveted joints 249 at the intermediate pressure plate 270 attached. In the area of the printing plate 172 is the coupling housing part 248 through the external toothing 167 rotatably with the internal teeth 166 the damper output part 160 connected. From the area of the coupling housing part 248 with the external teeth 167 extends a connecting part 252 radially inward. The radially inner end of the connecting part 252 is supported by a storage facility 253 at the gearbox full wave 152 from. The storage facility 253 includes a bearing outer ring 254 and a bearing inner ring 255 , Between the bearing inner ring 255 and the bearing outer ring 254 are rolling elements 256 arranged. The bearing outer ring 254 is on a support ring 257 attached with the help of a locking ring 259 , which is also referred to as a locking ring, to the crankshaft 151 is fixed in the axial direction. On the gear side facing the bearing device 255 is the hub part 175 the first clutch disc 174 rotatably on the shaft 152 appropriate. The location purely direction 253 is on a shaft section 261 the gearbox full wave 152 arranged between the journal 201 the transmission shaft 152 and the hub part 175 is arranged.

At the in 10 illustrated embodiment, the storage device 253 on the drive side in front of the clutch hub hubs 175 . 178 arranged. As a result, the mounting of the axial fixation is easier. However, this arrangement has the disadvantage that the storage facility 253 not optimal under the focus of the double clutch 150 is arranged.

In 11 is the cutout with the storage facility 223 out 8th shown enlarged. In 11 you can see that the bearing inner ring 225 a substantially circular cylinder jacket-shaped support portion 265 that is between the paragraph 228 and the lock ring 229 in the axial direction on the drive-side end of the transmission hollow shaft 153 is fixed. From the drive-side end of the support section 265 extends a mounting portion 267 essentially in the radial outward direction. At the attachment section 267 that is integral with the support section 265 is connected with the help of the screw 230 the retaining ring 231 attached. In 11 you can see that the storage facility 223 is formed of sheet metal parts. Before mounting are the screws 230 , which are also known as retaining screws, loosened. This may cause the retaining ring 231 move in the axial direction, thus allowing the preloaded, slotted locking ring 229 can widen. When the double clutch with the storage facility 223 on the transmission hollow shaft 153 is plugged, then the retaining screws 230 through the openings 192 in the first clutch disc 174 be attracted. The radially inner conical retaining ring 231 presses when tightening the retaining screws 230 the lock ring 229 together so that this is in the annular groove in the transmission hollow shaft 153 added. As a result, the double clutch is fixed in the axial direction. In case of dismantling, the retaining screws must 230 solved the who. Then the lock ring opens 129 due to its bias. Depending on the design can for axial fixation of the bearing device 223 instead of the lock ring 229 Also snap hook or a bayonet ring can be used. However, it must be ensured that the appropriate mounting locations, for example through the openings 192 , are accessible from the outside during assembly.

In 12 are a damper output part 160 with an internal toothing 166 and a coupling housing part 168 with an external toothing 167 , as with the torque transmitting devices of 6 and 7 , shown in perspective in unique position. The damper output part 160 , which is also referred to as a coupling flange, is designed as a sheet metal part. Radially outside are on the damper output part 160 two arms or fingers 161 . 162 arranged diametrically opposite. The internal toothing 166 and the external teeth 167 are equipped with chamfers and curves that serve as mounting aids. By a high number of teeth and the same tooth shapes over the entire circumference easy fitting of the spline is achieved during assembly. To keep a lot of space for the clutch on the coupling side of the flange, is the Zweimassenschwungradflansch 160 designed to be axially and radially narrow.

The coupling housing part 168 has a flange on the gearbox side 281 on that several feet 282 . 283 . 284 having. In the feet are each several through holes 286 . 287 . 288 provided, which serve to perform fasteners. Radially inside has the coupling housing part 168 a stiffening edge 290 on. The stiffening wheel 290 serves to an undesirable deformation of the external teeth 167 to keep low.

In 13 is a section of 12 shown enlarged, with the internal teeth 166 the damper output part 160 with the external teeth 167 of the coupling housing part 168 engaged. How to get in 13 sees, can the clutch housing part 168 in the axial direction with its external teeth in the damping input part 160 be introduced.

In the 14 to 16 are different embodiments of the damper output 160 shown in plan view. All embodiments have in common that in each case two arms or fingers 161 . 162 diametrically opposite outside of the damper output part 160 protrude. In addition, the damper output part 160 in all three Ausfüh tion examples running relatively slim. When a force is introduced by the bow springs of the dual-mass flywheel, there is a tendency to buckle in the radial direction. By picking up the damper output part 160 on the stiffer clutch housing part 168 (please refer 12 ), which is also referred to as an inner part, the size of the deformation is brought to a tolerable level for the gearing.

At the in 14 illustrated embodiment is the toothing 166 not continuous, but there are also areas 294 . 295 provided without teeth. Through the areas 294 . 295 without toothing, the deformation behavior of the damper output part 160 be further improved.

At the in 15 illustrated Ausfüh example are in the field of arms 161 . 162 radially inward slots 298 . 299 in the damper output part 160 appropriate. The slots 298 . 299 extend in the radial direction, but are not formed continuously. Through the slots 298 . 299 can the damper output part 160 be formed elastic. This allows a preloaded variant of the spline without the use of additional parts. As a result, the wear can be reduced and noise problems avoided.

In 16 is a damper output part 160 shown, consisting of two halves 301 . 302 is formed at the joints 304 . 305 are elastically connected with each other. This allows the flow of force in the damper output part 160 be improved. In addition, deformations in the operation of the damper output part 160 be reduced. The multi-part design of the dual mass flywheel also allows a particularly economical production. If, for example, two circumferentially symmetrical halves 301 . 302 can be combined, the parts can be produced with less punching waste from sheet metal.

In 17 an embodiment is shown in which a double clutch 310 via a driver part 311 with a crankshaft 151 is coupled. Radial inside is the driver part 311 by screws 312 on the crankshaft 151 attached. Radial outside is the driver part 311 by screws 314 on a coupling housing part 315 attached. On the coupling housing part 315 in turn (not shown) is an intermediate printing plate 316 attached. Drive side are between the intermediate pressure plate 316 and a printing plate 317 friction linings 318 a first clutch disc 319 clamped. The first clutch disc 319 is via a vibration damping device 320 with a hub part 321 the first clutch disc 319 coupled. The hub part 321 is non-rotatable with a hub bearing part 322 connected with the help of a screw 323 on a gear shaft 152 is attached, which is designed as a solid shaft.

Transmission side are between the intermediate pressure plate 316 and the printing plate 325 friction linings 326 a second clutch disc 327 clamped. The second clutch disc 327 is by another vibration damping device 328 with a hub part 329 coupled, the rotationally fixed to the drive end of a hollow gear shaft 153 is mounted.

The hub bearing part 322 has at its gear-side end a peripheral paragraph 330 on, which is a storage facility 333 for the intermediate printing plate 316 supported in the axial direction. The storage facility 333 includes a bearing outer ring 334 , which is radially inward on the intermediate pressure plate 316 is attached. In addition, the storage facility includes 133 a bearing inner ring 135 radially outward of the hub bearing part 322 is mounted. Between the bearing inner ring 335 and the bearing outer ring 334 are rolling elements 336 arranged.

At the in 17 illustrated embodiment, in contrast to the previous embodiments, no dual-mass flywheel used. Due to the considerable moment load in this embodiment, the connection between the double clutch 310 and the crankshaft 151 not designed as a plug connection. By an arrow 338 is the access to the screws 314 indicated during assembly. The connection of the double clutch 310 to the crankshaft 151 takes place at the in 17 illustrated embodiment via the drive plate 311 ,

In the in the 6 to 16 illustrated embodiments, the actuating forces of the double clutch are supported by the bearing means on one of the transmission input shafts. At the same time the bearing device advantageously serves the radial coupling support. The coupling can be pre-assembled in the clutch bell. The dual mass flywheel can be preassembled on the crankshaft. The connection to the coupling is made during assembly by means of splines. The spline provides an axial vibration decoupling of the clutch from the crankshaft vibrations. The necessary radial compensation of the clutch to the crankshaft is done by the movement probability of the damper output part in the dual mass flywheel. The internally toothed damper output member is centered by the externally toothed clutch housing member and is capable of balancing at its contact points with the parts of the dual mass flywheel.

1

powertrain

2

3

drive unit

4

crankshaft

5

transmission

6

Double coupling

7

8th

Torsional vibration damping device

9

screw

10

screw

11

Entrance part of 8th

12

Starter gear

13

14

15

16

spring means

17

18

output portion

19

Slip / friction ring

20

Belleville spring

21

22

Clutch housing part

23

24

rivet

25

26

Between the pressure plate

27

28

printing plate

29

friction linings

30

31

clutch disc

32

33

hub part

34

35

first Transmission input shaft => solid shaft

36

second Transmission input shaft => hollow shaft

37

roller bearing

38

hub part

39

printing plate

40

friction linings

41

42

second clutch disc

43

hub part

44

clutch housing

45

46

actuator

47

actuator

48

actuating lever

49

actuating lever

50

51

internal flange

52

outer flange ring

53

54

55

circlip

56

57

58

59

60

61

powertrain

62

63

drive unit

64

crankshaft

65

transmission

66

Double coupling

67

68

screw

69

70

Flex Plate

71

Starter gear

72

wing

73

support plate

74

75

screw

76

77

78

Between the pressure plate

79

Clutch housing part

80

81

82

83

84

85

86

87

88

printing plate

89

friction linings

90

91

clutch disc

92

Torsional vibration damping device

93

hub part

94

95

first Transmission input shaft => solid shaft

96

second Transmission input shaft => hollow shaft

97

needle roller bearings

98

tubular hub part => between 95 and 96

99

rivet

100

printing plate

101

friction linings

102

clutch disc

103

Torsional vibration damping device

104

hub part

105

106

actuator

107

actuator

108

actuating lever

109

actuating lever

110

111

112

113

114

115

116

117

needle roller bearings

140

A clutch unit

150

Double coupling

151

crankshaft

152

Transmission output shaft

153

Transmission output shaft

154

vibration

155

introductory

156

screw

157

component

158

chamber

159

energy storage

160

output portion

161

poor or fingers

162

163

Friction / slip ring

164

Belleville spring

165

166

internal gearing

167

external teeth

168

Clutch housing part

169

riveted joints

170

Between the pressure plate

171

printing plate

172

printing plate

173

friction linings

174

first clutch disc

175

Hub part => 152 . 153

176

177

178

hub part

179

second clutch disc

180

friction linings

181

shaft section

182

183

Storage facility

184

Bearing outer ring

185

Bearing inner ring

186

rolling elements

187

188

circlip

189

circlip

190

screw

191

retaining ring

192

Opening in 174

193

194

clutch housing

195

196

actuator

197

actuator

198

actuating lever

199

actuating lever

200

201

pivot

202

203

204

blind hole

205

206

needle roller bearings (Pilot stock)

220

axial connector

221

shaft section

222

223

Storage facility

224

Bearing outer ring

225

Bearing inner ring

226

rolling elements

227

228

paragraph

229

circlip

230

screw

231

retaining ring

232

233

234

235

Hub bearing part

236

bearing sleeve

237

needle roller bearings

238

holding body

239

attachment section

241

screw

242

paragraph

243

Storage facility

244

Bearing outer ring

245

Bearing inner ring

246

rolling elements

247

Kupplungsglocke

248

Clutch housing part

249

rivet

250

251

252

connecting part

253

Storage facility

254

Bearing outer ring

255

Bearing inner ring

256

rolling elements

257

support ring

258

259

safety device

260

261

shaft section

262

263

264

265

supporting section

266

267

attachment section

268

269

270

281

flange

282

foot

283

foot

284

foot

285

286

Through Hole

287

Through Hole

288

Through Hole

289

290

reinforcing edge

291

292

293

294

areas

295

areas

296

297

298

slot

299

slot

300

301

half

302

half

303

304

junction

305

junction

306

307

308

309

310

Double coupling

311

driver part

312

screw

313

314

screw

315

clutch housing

316

Between the pressure plate

317

printing plate

318

friction linings

319

clutch disc

320

Vibration damping device

321

hub part

322

Hub bearing part

323

Screw on 152

324

325

printing plate

326

friction linings

327

clutch disc

328

Vibration damping device

329

Hub part on 153

330

paragraph

331

332

333

Storage facility

334

Bearing outer ring

335

Bearing inner ring

336

rolling elements

337

338

arrow

339

340

Claims (32)

Torque transmission device in the drive train ( 1 ; 61 ) of a motor vehicle for torque transmission between a drive unit ( 3 ; 63 ), in particular an internal combustion engine, with an output shaft ( 4 ; 64 ; 151 ), in particular a crankshaft, and a transmission ( 5 ; 65 ) with at least two transmission input shafts ( 35 . 36 ; 95 . 96 ; 152 . 153 )), each with a friction linings having clutch disc ( 31 . 42 ; 91 . 102 ; 174 . 178 ) are rotatably connected, wherein between the friction linings of a clutch disc and the friction linings of the other clutch disc an intermediate pressure plate ( 26 ; 78 ; 170 ) is arranged, which is non-rotatably connected to the output shaft of the drive unit, wherein the friction linings of the clutch discs ( 31 . 42 ; 91 . 102 ; 174 . 178 ) between the intermediate pressure plate ( 26 ; 78 ; 170 ) and printing plates ( 28 . 39 ; 88 . 100 ; 171 . 172 ) arranged by means of an actuating device ( 46 . 47 ; 106 . 107 ; 196 . 197 ) in relation to the transmission input shafts, axial direction relative to the intermediate pressure plate ( 26 ; 78 ; 170 ) are movable to clamp the friction linings between the intermediate pressure plate and the pressure plates, characterized in that the intermediate pressure plate ( 26 ; 78 ; 170 ) in the radial direction at least at one of the transmission input shafts ( 35 . 36 ; 95 . 96 ; 152 . 153 ) is stored. Torque transmission device according to claim 1, characterized in that the intermediate pressure plate ( 26 ; 170 ) by means of a storage facility ( 223 ), in particular a radial bearing ( 37 ), on one of the transmission input shafts, in particular on an internally hollow transmission input shaft ( 36 ; 153 ) is mounted, in which a further transmission input shaft ( 35 ; 152 ) is rotatably arranged. Torque transmission device according to claim 2, characterized in that on one of the transmission input shafts, in particular the further transmission input shaft ( 35 ), one of the clutch discs ( 31 ) detachable, that is non-destructively separable, is attached. Torque transmission device according to claim 3, characterized in that on one of the transmission input shafts, in particular the further transmission input shaft ( 35 ), attached clutch disc ( 31 ) is executed in two parts. Torque transmission device according to claim 4, characterized in that on one of the transmission input shafts, in particular the further transmission input shaft ( 35 ), attached clutch disc ( 31 ) a hub part ( 33 ), of which an inner flange ( 51 ) releasably, that is non-destructively separable, on an outer flange ( 52 ), on the radially outer friction linings ( 29 ) are mounted. Torque transmission device according to claim 5, characterized in that the two flange rings ( 51 . 52 ) are connected to each other by at least one screw. Torque transmission device according to one of the preceding claims, characterized in that one of the transmission input shafts as a hollow shaft ( 96 ) is formed, in which the further transmission input shaft ( 95 ) is rotatably arranged, wherein between the two transmission input shafts a substantially tubular hub part ( 98 ) is rotatably arranged with a drive-side and a transmission-side end, wherein at the drive-side end of the hub part ( 98 ) the intermediate printing plate ( 78 ) is attached. Torque transmission device according to claim 7, characterized in that the hub part ( 98 ) in the region of its transmission-side end within the hollow shaft ( 96 ) on the hollow shaft ( 96 ) is stored. Torque transmission device according to claim 7, characterized in that the hub part ( 98 ) in the region of its transmission-side end within the hollow shaft ( 96 ) on the further transmission input shaft ( 95 ) is stored. Torque transmission device according to one of claims 1 to 6, characterized in that the intermediate pressure plate ( 170 ; 316 ) in the axial direction on one of the transmission input shafts ( 152 . 153 ) is supported. Torque transmission device according to one of the preceding claims, characterized in that the double clutch ( 150 ; 310 ) is preassembled in a coupling housing. Torque transmission device according to claim 11, characterized in that the bearing point of the pre-assembled double clutch ( 150 ; 310 ) is arranged in the region or in the vicinity of the center of gravity of the coupling. Torque transmission device according to one of claims 10 to 12,. characterized in that one of the transmission input shafts ( 153 ) is designed as a hollow shaft, in which the further transmission input shaft ( 152 ) is rotatably arranged, wherein the intermediate pressure plate ( 170 ) by means of a storage facility ( 183 ; 223 ; 253 ) directly on one of the transmission input shafts ( 152 . 153 ), in particular on the further transmission input shaft ( 152 ) is stored. Torque transmission device according to one of claims 10 to 12, characterized in that one of the transmission input shafts as a hollow shaft ( 153 ) is formed, in which the further transmission input shaft is rotatably arranged, wherein the intermediate pressure plate ( 170 ; 316 ) by means of a storage facility ( 243 ; 333 ) on a hub bearing part ( 225 ; 322 ) is mounted, the detachable, which means non-destructively separable, at the drive end of the further transmission input shaft ( 152 ) is attached. Torque transmission device according to claim 14, characterized in that one of the clutch discs ( 174 ; 319 ) rotatably with the hub bearing part ( 235 ; 322 ) connected is. Torque transmission device according to one of claims 10 to 15, characterized in that the bearing device ( 183 ; 223 ; 253 ) a bearing outer ring ( 184 ), which radially inward on the intermediate pressure plate ( 170 ), and / or a bearing inner ring ( 185 ), which radially outward on the associated transmission input shaft ( 152 . 153 ) is attached. Torque transmission device according to claim 16, characterized in that the bearing inner ring ( 185 ) a support section ( 265 ) which radially inward so on one of the transmission input shafts ( 152 . 153 ) is pushed, that the transmission-side end of the support section ( 265 ) on a paragraph ( 228 ) is applied to the associated transmission input shaft ( 153 ) is trained. Torque transmission device according to claim 17, characterized in that of the drive-side end of the support portion ( 265 ) a fastening section ( 267 ), on which a retaining ring ( 231 ) detachable, that is non-destructively separable, is attached. Torque transmission device according to claim 18, characterized in that the retaining ring ( 231 ) by means of at least one screw connection ( 230 ) at the attachment portion ( 267 ) of the bearing inner ring ( 225 ) is attached. Torque transmission device according to claim 19, characterized in that the retaining ring has radially inside a fixing section, which in dependence on the screwed state of the screw ( 230 ) so a closing force on a locking ring ( 229 ) exerts that the locking ring ( 229 ) engages in an annular groove in the associated transmission input shaft ( 153 ) is provided. Torque transmission device according to claim 20, characterized in that the locking ring ( 229 ) slotted and biased so that it on the associated transmission input shaft ( 153 ) can be plugged. Torque transmission device according to one of claims 16 to 21, characterized in that the bearing outer ring ( 184 ), the bearing inner ring ( 185 ), the retaining ring ( 231 ) and / or the locking ring ( 229 ) are formed of sheet metal. Torque transmission device according to one of the preceding claims, characterized in that between the output shaft ( 151 ) of the drive unit and the double clutch ( 150 ) a torsional vibration damping device ( 154 ), in particular a dual-mass flywheel, is connected, which is a damper input part ( 155 ), the non-rotatably with the output shaft ( 151 ) of the drive unit is connected, and a damper output part ( 160 ) which is releasably, that is non-destructively separable, with a dual-clutch housing part ( 168 ), to which the intermediate printing plate ( 170 ) is attached. Torque transmission device according to claim 23, characterized in that between the double clutch housing part ( 22 ; 168 ) and the damper output part ( 18 ; 160 ) a spring device ( 20 ; 164 ) is biased by the damper output part ( 18 ; 160 ) against a friction / sliding device ( 19 ; 163 ) pressed between the damper input part ( 11 ; 155 ) and the damper output part ( 18 ; 160 ) is arranged. Torque transmission device according to claim 24, characterized in that the damper output part ( 160 ) on its inside radially within the friction / sliding device ( 163 ) a recess for receiving a portion of the dual clutch housing part ( 168 ) having. Torque transmission device according to one of claims 23 to 25, characterized in that the dual clutch housing part ( 168 ) is formed of sheet metal and a flange ( 281 ), for fixing the dual clutch housing part ( 168 ) on the intermediate printing plate ( 170 ) serves. Torque transmission device according to claim 26, characterized in that the double clutch housing part ( 168 ) an outer toothed area ( 167 ), which is integral with the flange portion ( 281 ) and complementary to an internal toothing ( 166 ) is formed radially inwardly of the damper output part ( 160 ) is provided. Torque transmission device according to claim 27, characterized in that the outer toothed region ( 127 ) of the dual clutch housing part ( 168 ) in the radial direction between the inner diameter and the outer diameter of the friction linings ( 173 ) of the adjacent clutch disc ( 174 ) is arranged. Torque transmission device according to claim 27 or 28, characterized in that radially within the external toothing region ( 167 ) a stiffening edge ( 290 ) on the dual clutch housing part ( 168 ) is trained. Torque transmission device according to one of claims 23 to 29, characterized in that the damper output part ( 160 ) has substantially the shape of a circular disk formed from sheet metal, at the radially inner an internal toothing ( 166 ) and radially outside at least one driver finger ( 161 . 162 ) formed in an energy storage device of the torsional vibration damping device ( 154 ) intervenes. Torque transmission device according to claim 30, characterized in that on the damper output part ( 160 ) radially outwardly diametrically opposite two driver fingers ( 161 . 162 ) are formed. Torque transmission device according to claim 31, characterized in that in the region of the driver fingers ( 161 . 162 ) in the damper output part ( 160 ) each have a radially extending slot ( 298 . 299 ) is trained.