DE102011104247A1 - Dual clutch arrangement for coupling engine-side input shaft i.e. crankshaft, with transmission-side output shafts of powertrain of motor car, has two-mass flywheel partly arranged at height of central plate in axial direction - Google Patents

Abstract

The arrangement (10) has an actuating system (42) for axially moving pressing plates (20, 34). A two-mass flywheel (14) is provided for torsional vibration damping of an engine-side input shaft (62). Clutches (16, 18) are directly actuatable by the actuating system in a translation-free manner. The two-mass flywheel is partly arranged at height of a central plate (24) in axial direction. A clutch disk (26) is connected with a transmission-side output shaft (28), and a coupler cover (30) is connected with the central plate.

Description

The invention relates to a dual clutch arrangement, with the aid of which in a motor vehicle, an engine-side input shaft with two coaxially arranged transmission-side output shafts can be coupled substantially traction interruption free.

Out EP 1 862 688 A2 is a lever-operated double clutch according to the "three-plate design" with an upstream dual-mass flywheel known. The dual clutch has a first clutch and a second clutch, each having a clutch cover and a movable actuating lever movable pressure plate, wherein the pressure plates can be moved against a common central plate to a clutch associated with each clutch disc frictionally between the central plate and the to press each pressure plate. The clutch cover, the operating lever and the pressure plates of the respective clutch are designed symmetrically to the central plate.

The disadvantage of such a dual clutch arrangement is the high space requirement, in particular in the axial direction.

It is the object of the invention to provide a dual-clutch arrangement, by means of which a small space requirement, in particular in the axial direction, can be made possible.

The object is achieved by the features of claim 1. Preferred embodiments of the invention are specified in the dependent claims.

The dual clutch assembly according to the invention for coupling an engine-side input shaft having a first transmission-side output shaft and / or a second transmission-side output shaft has a first clutch having a relative to a central plate axially movable first pressure plate for coupling a first output shaft connected to the first clutch disc and one with the Central plate connected first clutch cover has. Accordingly, a second clutch is provided which has a second pressure plate axially movable relative to the central plate for coupling a second clutch disc connected to the second output shaft and a second clutch cover connected to the central plate, wherein at least a portion of the components of the first clutch are substantially similar, in particular symmetrical, are designed to components of the second clutch. Further, an actuating system for axially moving the first pressure plate and / or the second pressure plate and a torsional vibration damper, in particular two-mass flywheel, provided for torsional vibration damping of the input shaft. According to the invention, the first clutch and / or the second clutch can be actuated directly by the actuating system without translation and / or the torsional vibration damper is arranged at least partially in the axial direction at the level of the central plate.

By the displacement of the torsional vibration damper in the region of the central plate of the axial space requirement for the torsional vibration damper can be reduced, so that the Baumraumbedarf the dual clutch assembly can be reduced in the axial direction. A different shape design of the components of the first clutch and the second clutch is not required for this purpose. Additionally or alternatively, the first clutch and / or the second clutch can be actuated directly, that is, an actuating element designed in particular as an actuating pot is not pivoted to move the respective pressure plate, but is displaced substantially without translation in the axial direction. As a result, projections projecting in the axial direction can be dispensed with for the purpose of forming pivot points or bearing points for an actuating element designed as an actuating lever, so that the space requirement of the double clutch in the axial direction can be correspondingly reduced. At the same time, it is possible for the clutch cover and / or the actuating element and / or the pressure plate and / or the clutch disc of the respective clutch similar, in particular symmetrical form, so that for the first clutch and the second clutch inexpensive to produce common parts can be used.

Particularly preferably, the actuating system has a first piston for the axial movement of the first pressure plate by means of a first actuating pot and a second piston for the axial movement of the second pressure plate by means of a second actuating pot, wherein the actuating travel of the first piston substantially corresponds to the displacement of the first pressure plate and / or the actuating travel of the second piston essentially corresponds to the displacement path of the second pressure plate. As a result, a directly actuated translation-free coupling is formed. A pivoting of the respective operating pot does not take place, so that the corresponding components for enabling pivoting of the respective operating pot can be saved. Assuming an ideally rigid actuating pot the actuating travel of the respective piston corresponds exactly to the displacement of the associated pressure plate. The displacement of the respective pressure plate thus differs from the actuating travel of the associated piston only to the Distance in the axial direction by which the associated operating pot is bent elastically when operating the respective coupling. The double clutch can be constructed much simpler. Since space in the axial direction for the pivoting of the actuating pot is not needed, the space of the double clutch can be reduced in the axial direction.

The respective pressure plate can be rotatably connected via a toothing with the respective output shaft, but axially movable. However, the respective pressure plate can also be connected only to an actuating element in the form of an actuating pot or actuating lever. The respective clutch disc can have, in particular on mutually path-breaking axial end faces, in each case a friction lining which can come into frictional engagement with an optionally provided friction lining of the central plate and / or pressure plate in order to close the respective clutch. The respective clutch disc can be rotatably connected via a toothing with the respective output shaft, but axially movably connected. The respective pressure plates and the central plate are designed in particular as separate functionally separate components, so that a so-called "three-plate design" is given for the double clutch. In order to simplify the assembly, the central plate can also be designed in several parts, in particular in two parts, wherein the individual parts of the central plate can be firmly connected, in particular permanently, for example by welding or riveting. The double clutch formed by the first clutch and the second clutch may be directly or indirectly connected, in particular, to a vibration damper, in particular dual-mass flywheel and / or centrifugal pendulum and / or mass pendulum, located upstream of the engine and / or on the transmission side. Furthermore, the respective clutch disc can be damped in particular by means of a disc damper. The dual clutch can in particular be connected to the input shaft via a rigid disk (drive plate) and / or a flexible and / or flexible disk (flexplate), wherein the disk can transmit torques in order to be able to introduce the torque of the input shaft into the double clutch. Due to the flexible design of the disc occurring vibrations can be completely or partially damped or eliminated.

In particular, the central plate has a receiving pocket, in particular circumferential in the circumferential direction, for at least partially receiving a part of the torsional vibration damper, wherein in particular an energy storage element, in particular bow spring, of the torsional vibration damper is received by the receiving pocket. The central plate may, for example, have a recess forming the receiving pocket at its radially outwardly pointing end. The torsional vibration damper can thereby partially protrude into the region of the central plate, whereby the space requirement in the radial direction can be reduced accordingly. Furthermore, the receiving pocket can form a boundary surface, which is relevant for the intended function of the torsional vibration damper. For example, a trained as a dual mass flywheel torsional vibration damper having a bow spring, wherein the bottom spring is guided in a spring pocket, which is at least partially formed by the receiving pocket of the central plate. The material use of the dual mass flywheel in the region of the bow spring can be reduced thereby, whereby the manufacturing costs can be reduced.

Preferably, the first clutch cover and the second clutch cover form a circumferential in particular circumferential receiving pocket for at least partially receiving a portion of the torsional vibration damper, in particular an energy storage element, in particular bow spring, the torsional vibration damper is received by the receiving pocket. The receiving pocket formed by the clutch cover can be used in accordance with the above-described receiving pocket formed by the central plate. In particular, the first clutch cover and the second clutch cover may at least partially form a spring pocket for the bow spring of a dual-mass flywheel. By shifting some relevant for the torsional vibration damper functions on components of the dual clutch, the manufacturing cost of the dual clutch assembly can be reduced.

In a preferred embodiment, an output flange of the torsional vibration damper extends in the radial direction through the central plate for support on the first output shaft and / or on the second output shaft. The central plate preferably has a counterplate associated with the first clutch and a second counterplate associated with the second clutch from the first counterplate via the output flange, wherein the first counterplate and the second counterplate are connected, in particular riveted, to the output flange. The first counter-plate and the second counter-plate are in particular insoluble, for example, by welding or riveting, connected together. This makes it possible in particular symmetrically form the central plate, so that the central plate can be used with both the one axial side and with the other axial side in an assembly in the double clutch. A support of the central plate on one of the output shafts takes place in particular only indirectly via the output flange of in particular designed as a dual mass flywheel torsional vibration damper.

In particular, the first clutch can be actuated by means of an actuating rod guided through the first output shaft and the second output shaft. By the actuating rod, it is possible to design as many components of the first clutch and the second clutch of the double clutch similar. It is not necessary that an actuating element with the aid of axially extending actuating fingers and / or tie rods must be passed through the central plate in order to operate the separate from the actuating system on the central plate pressure plate can. Furthermore, the space requirement can be reduced in the radial direction, since an actuating finger does not have to be guided radially outside of pressure plates. A suitable structural design and a suitable actuating mechanism for the actuating rod is in EP 1 862 688 A2 described, the content of which is hereby incorporated by reference.

Preferably, the actuating system has a first actuating cylinder for axial movement of the first pressure plate and a second actuating cylinder for axial movement of the second pressure plate, wherein the first actuating cylinder to the second actuating cylinder via a coupled to the first output shaft and / or with the second output shaft gearbox axially separated is arranged. The actuating system can thus be designed distributed on two different axial sides of the transmission. As a result, the first clutch can then be actuated by a side of the transmission remote from the double clutch with the aid of the first actuating cylinder via the actuating rod, while the second clutch can be actuated by the second actuating cylinder arranged between the dual clutch and the transmission. The first actuating cylinder and the second actuating cylinder can be connected via respective hydraulic hose lines to a corresponding, in particular common, pressure reservoir. Due to the displacement of the first actuating cylinder out of the region of the double clutch, the dual clutch arrangement can be made more compact and space-saving. In particular, the first actuating cylinder can be moved into a region which is subjected to lower requirements of the installation space.

Particularly preferably, the central plate via a fixed bearing, in particular deep groove ball bearings, supported on the first output shaft and / or on the second output shaft. The axial position of the central plate relative to the first output shaft and / or to the second output shaft can thereby be defined and exactly predetermined. Furthermore, acting on the central plate axial forces and radial forces can be removed via the fixed bearing to the respective output shaft.

In particular, the central plate can be coupled via a toothing for axial tolerance compensation with the input shaft via the torsional vibration damper. By the teeth, a rotationally fixed connection with the input shaft, in particular a crankshaft of a motor vehicle, are produced, wherein axial tolerances of the distance of the input shaft relative to the first output shaft and / or to the second output shaft can be automatically compensated. Further, for coupling the dual clutch and / or the torsional vibration damper with the input shaft, the corresponding components are simply plugged over the teeth, so that a montage without difficulty can also be blind.

The invention further relates to a transmission line for a motor vehicle having an engine-side input shaft, a first transmission-side output shaft, a second transmission-side output shaft and a dual clutch for coupling the input shaft to the first output shaft and / or the second output shaft, the dual clutch as described above and can be trained.

The invention will be explained by way of example with reference to the accompanying drawings based on preferred embodiments. Show it:

1 FIG. 2 is a schematic sectional view of a dual clutch arrangement in a first embodiment, FIG.

2 FIG. 2 is a schematic sectional view of a dual clutch assembly of a second embodiment and FIG

3 FIG. 2 is a schematic sectional view of a dual clutch assembly in a third embodiment. FIG.

In the 1 illustrated dual clutch assembly 10 has a double clutch 12 on, with one as a dual mass flywheel 14 configured torsional vibration damper is coupled. The double clutch 12 has a first clutch 16 and a second clutch 18 on. The first clutch 16 has a first pressure plate 20 on, with the aid of a first actuating element, in the embodiment shown as the first operating pot 22 is formed, for closing the first clutch 16 on a central plate 24 to be moved. Between the first pressure plate 20 and the central plate 24 is a first clutch disc 26 provided, which has a toothing with a first output shaft 28 rotationally fixed, but axially movable, is connected. To close the first clutch 16 can be between the first clutch disc 26 and the pressure plate 20 as well as the central plate 24 a frictional connection can be made. The first pressure plate 20 and the first clutch disc 26 are at least partially from a first clutch cover 30 the first clutch 16 covered. Accordingly, the second clutch 18 one from a second actuator head 32 axially movable second pressure plate 34 on to between the common central plate 24 and the pressure plate 34 a second clutch disc 36 for closing the second clutch 18 to press. The second clutch disc 36 is rotationally fixed, but axially movable with a second output shaft 38 connected. The second clutch 18 has a second clutch cover 40 on that with an actuation system 42 is attached. The actuation system 42 has a first pressure cylinder, not shown, for axially moving one with the first actuating pot 22 connected actuating rod 44 and a second actuating cylinder 46 for axially moving the second actuating pot 32 on. Both the first clutch cover 30 as well as de second clutch cover 40 are with the common central plate 24 connected.

The first operating pot 22 is symmetrical to the second operating pot 32 educated. Furthermore, the first pressure plate 20 symmetrical to the second pressure plate 34 educated. Also the first clutch disc 26 is substantially symmetrical to the second clutch disc 36 educated. The common central plate 24 is about a fixed bearing in the form of a deep groove ball bearing 48 on the second output shaft 38 supported. With the exception of the contact area of the central plate 24 at the deep groove ball bearing 48 is also the central plate 24 designed substantially symmetrical.

The first clutch cover 30 is about a first intermediate piece 50 about a gearing 52 with a starting flange 54 of the dual mass flywheel 14 coupled. The output flange 24 is over a bow spring 56 with an input flange 58 of the dual mass flywheel 14 connected. The input flange 58 is about a screw connection 60 with an input shaft 62 , in particular a crankshaft of a motor vehicle engine, connected.

At the in 2 illustrated embodiment of the dual clutch assembly 10 is the dual mass flywheel 14 in large part in the axial direction at the height of the central plate 24 arranged. This is the first connector 50 over the screw connection 60 with the input shaft 62 bolted and over a gearing 52 with a second intermediate piece 64 connected, in turn, with the input flange 58 of the dual mass flywheel 14 connected is. The intermediate plate 24 has a radially outwardly open receiving pocket 66 on, in the essential functional parts of the dual mass flywheel 14 are included. In particular, the bow spring 56 to a large extent in the receiving bag 66 the central plate 24 added. In the illustrated embodiment, the output flange runs 54 of the dual mass flywheel 14 in the radial direction through the central plate 24 through and is on the deep groove ball bearing 48 supported. The central plate 24 can in this case a first counter plate 68 and a second counter plate 70 have, over the output flange 54 are separated from each other, but with each other and / or with the output flange 54 firmly, in particular insoluble, for example, by welding or riveting, are connected.

At the in 3 illustrated embodiment of the dual clutch assembly 10 becomes the receiving bag 66 instead of the central plate 24 through the first clutch cover 30 and the second clutch cover 40 educated. It is also possible that the central plate 24 In addition, a part of the receiving bag 66 formed. In particular, it is possible that the output flange 54 of the dual mass flywheel 14 omitted and through the first clutch cover 30 and the second clutch cover 40 is trained.

Furthermore, the in 2 and in 3 illustrated embodiments of the dual clutch assembly 10 with lever-operated couplings 16 . 18 designed. That is, the first actuator of the first clutch is the first operating lever 74 and the second actuator as a second operating lever 76 designed. The operating levers 74 . 76 can adhere to noses 72 support or pivot to the respective pressure plate 20 . 34 to move. In contrast, the actuation pots 22 . 32 the in 1 illustrated embodiment of the dual clutch assembly 10 directly actuated and perform a purely axial movement without pivoting around noses 72 is required.

LIST OF REFERENCE NUMBERS

10

Dual clutch assembly

12

Double coupling

14

Dual Mass Flywheel

16

first clutch

18

second clutch

20

first pressure plate

22

first actuating pot

24

Central plate

26

first clutch disc

28

first output shaft

30

first clutch cover

32

second actuating pot

34

second pressure plate

36

second clutch disc

38

second output shaft

40

second clutch cover

42

actuating system

44

actuating rod

46

second actuating cylinder

48

Deep groove ball bearings

50

first intermediate piece

52

gearing

54

output flange

56

bow spring

58

inlet flange

60

screw

62

input shaft

64

second intermediate piece

66

receiving pocket

68

first counter plate

70

second counter plate

72

nose

74

first operating lever

76

second operating lever

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• EP 1862688 A2 [0002, 0013]

Claims (10)

Double clutch arrangement for coupling a motor-side input shaft ( 62 ) with a first transmission-side output shaft ( 28 ) and / or a second transmission-side output shaft ( 38 ), with a first clutch ( 16 ), which is a relative to a central plate ( 24 ) axially movable first pressure plate ( 20 ) for coupling one with the first output shaft ( 28 ) connected first clutch disc ( 26 ) and one with the central plate ( 24 ) connected first clutch cover ( 30 ), a second clutch ( 18 ), one relative to the central plate ( 24 ) axially movable second pressure plate ( 34 ) for coupling one with the second output shaft ( 38 ) connected second clutch disc ( 36 ) and one with the central plate ( 24 ) connected second clutch cover ( 40 ), wherein at least a part of the components ( 20 . 22 . 26 . 30 . 74 ) of the first clutch ( 16 ) substantially similar, in particular symmetrical, to components ( 32 . 34 . 36 . 40 . 76 ) of the second clutch ( 18 ), an actuating system ( 42 ) for axially moving the first pressure plate ( 20 ) and / or the second pressure plate ( 34 ), and a torsional vibration damper, in particular two-mass flywheel ( 14 ), to the torsional vibration damping of the input shaft ( 62 ) characterized in that the first clutch ( 16 ) and / or the second clutch ( 18 ) of the actuation system ( 42 ) is directly operable without translation and / or the torsional vibration damper ( 14 ) at least partially in the axial direction at the level of the central plate ( 24 ) is arranged. Double clutch arrangement according to claim 1, characterized in that the central plate ( 24 ) a circumferential pocket in particular in the circumferential direction ( 66 ) for at least partially receiving a part of the torsional vibration damper ( 14 ), wherein in particular an energy storage element, in particular bow spring ( 56 ), the torsional vibration damper ( 14 ) from the receiving pocket ( 66 ) is recorded. Double clutch arrangement according to claim 1 or 2, characterized in that the first clutch cover ( 30 ) and the second clutch cover ( 40 ) a circumferential pocket in particular in the circumferential direction ( 66 ) for at least partially receiving a part of the torsional vibration damper ( 14 ), wherein in particular an energy storage element, in particular bow spring ( 56 ), the torsional vibration damper ( 14 ) from the receiving pocket ( 66 ) is recorded. Double clutch arrangement according to one of claims 1 to 3, characterized in that an output flange ( 54 ) of the torsional vibration damper ( 14 ) in the radial direction through the central plate ( 24 ) for support on the first output shaft ( 28 ) and / or on the second output shaft ( 38 ) passes through. Double clutch arrangement according to claim 4, characterized in that the central plate ( 24 ) one of the first clutch ( 16 ) associated first counter-plate ( 68 ) and one of the first counter-plate ( 68 ) over the output flange ( 54 ) separate the second clutch ( 18 ) associated second counter-plate ( 70 ), wherein the first counter-plate ( 68 ) and the second counter plate ( 70 ) with the output flange ( 54 ), in particular riveted, are. Double clutch arrangement according to one of claims 1 to 5, characterized in that the first clutch ( 16 ) by means of a through the first output shaft ( 28 ) and the second output shaft ( 38 ) guided operating rod ( 44 ) is operable. Double clutch arrangement according to one of claims 1 to 6, characterized in that the actuating system ( 42 ) a first actuating cylinder for the axial movement of the first pressure plate ( 20 ) and a second actuating cylinder ( 46 ) for the axial movement of the second pressure plate ( 34 ), wherein the first actuating cylinder to the second actuating cylinder ( 46 ) via one with the first output shaft ( 28 ) and / or with the second output shaft ( 38 ) coupled gear is arranged axially separated. Double clutch arrangement according to one of claims 1 to 7, characterized in that the central plate ( 24 ) via a fixed bearing, in particular deep groove ball bearings ( 48 ), at the first output shaft ( 28 ) and / or at the second output shaft ( 38 ) is supported. Double clutch arrangement according to one of claims 1 to 8, characterized in that the central plate ( 24 ) via a toothing ( 52 ) for axial tolerance compensation with the input shaft ( 62 ) via the torsional vibration damper ( 14 ) can be coupled. Gear train for a motor vehicle with an engine-side input shaft ( 62 ), a first transmission-side output shaft ( 28 ), a second transmission-side output shaft ( 38 ) and a dual clutch arrangement ( 10 ) according to one of claims 1 to 9 for coupling the input shaft ( 62 ) with the first output shaft ( 28 ) and / or the second output shaft ( 38 ).

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