DE19723104A1 - Clutch unit esp. for motor vehicle - Google Patents

Abstract

The coupling unit has a cover with a ring shaped enclosure (60) and at least one target element (110) for a sensor, which detects a rotation of the cover. The cover and the target element are constructed as a one piece entity. The target element (110) consists of at least one axially aligned tongue which is arranged projecting radially outwards, in relation to the ring shaped enclosure (60). The fixing attachment and the tongue extend axially from an axial termination edge of the ring shaped enclosure.

Description

The present invention relates to a clutch unit, especially for motor vehicles, according to Preamble of claim 1, as in the on May 2 1997 published EP-A-0 770 778 becomes.

With such a design, the counterpressure plate simplified because, especially compared to the solutions described in FR-A-2 546 594 without Be attachment approaches is carried out, the appendages medium directly between the cover and the pressure plate be effective.

This allows for a given radial space the size of the friction linings of the clutch disc and / or the damper, which the be clutch disc usually said in its mean part includes. In addition, there is an active one Locking of the lid in relation to the opposite press plate attached to its support flange.

The fasteners generally have a ge wrestle radial space requirements. They are axially in the ver Ratio to the clutch disc, which thereby as close as possible to the outer edge of the lid  can be performed on the attachment approaches points.

It is possible the one exerted by the diaphragm spring Load and / or their inclination or their position too adjust by the lugs axially more or less who are deeply involved in their associated passage the.

This results in a simple telescopic type bringing the lid.

In addition, the cover has a simple shape, since it is designed without a radial fastening edge strip as in FIG. 2 of FR-A-2 546 594.

The attachment lugs are in one piece using Stan Zen and bending from an axially aligned ring Shaped cylindrical surround that the Has lid on its outer edge, this one is circumferentially comb-shaped and the approaches the free ends of the annular zylin form a trimmed border.

Based on the passages and the approaches, the lid can be prepositioned. To form a built-in area Example, at least one approach and an associated axial passage one under have different sizes. As a variant, these are Approach and this passage is not evenly ver Splits.

Furthermore, it is, for example from US-A-4,493,409 known the lid with at least one To provide the target element for a cover circulation sensor of the signals generated, in particular to a Rech ner for controlling the ignition of the internal combustion engine be transmitted, the egg with a power transmission  Nes motor vehicle is connected to which the hitch unit heard.

For example, the coupling unit bears in EP-A-0 770 778 a target element by means of welding the lid attached part is formed. Thereby he the number of parts and costs increase, in particular due to the weld.

The present invention is based on the object de, a new design of a coupling unit in of EP-A-0 770 778 Kind to propose in a simple and economical way che way with at least one target element for one Sensor for detecting the circulation of the lid of the Coupling unit is equipped.

Thanks to this design according to the invention, the goal element advantageously, for example by means of Punching and bending, at the same time as the fasteners sets of the lid, which itself turn from the axially aligned annular skirt of the lid are worked out. This will make the Number of parts reduced accordingly.

Thanks to the invention, the or the one piece with the axially aligned annular skirt guided target elements a particularly low ra dial up space requirements, whereby they are nothing special Need funds for their attachment to the lid.

The available space is saved without the need ner machining of the outer edge of the pressure plate to achieve a high measuring accuracy with the help of the aforementioned sensor is used in the best possible way. The Ge genanpreßplatte and the sensor are therefore simple and economically executed.  

According to further features of the invention, the following is as follows intended:

• - The target element consists of at least one axially aligned tongue, which is in relation to the ringför is edged radially outward to to achieve good measuring accuracy.
• - Extend the attachment lugs and the tongue axially from an axial end edge of the ring shaped border.
• - There is an axial play between the free End of the tongue and the opposite section the outer edge of the radial friction surface of the counter press plate or the support flange.
• - As a variant, the free end of the tongue comes on the Starter ring gear to support to position the cover function.
• - The annular bezel of the lid includes one Row of angularly distributed tongues, under which min mostly a tongue called the main tongue becomes the said target element.
• - The main tongue has a width, measured along the tangential direction, on that of the latitude the other tongues are different.
• - The said other tongues are angularly even ßig distributed, in relation to the ring-shaped offset radially outwards towards the cover are.
• - The free end of the attachment lugs is on the Pressure plate or welded to the support flange.  
• - The free end of the attachment lugs is radial bent over.
• - Each pass is an axial notch, which in the outer peripheral surface of the counterpressure plate or of the support flange and radially outwards is open.
• - The counter pressure plate or the support flange is attached a starter ring gear on its outer edge, and each Passage is ra in relation to the starter ring gear dial arranged inwards.
• - The starter ring gear is on one in the outer Circumferential surface of the counterpressure plate or the support flange built-in support surface attached, whose radial depth is smaller than that of the axial out is click.
• - The free end of the attachment lugs is on welded ring gear ring.
• - The free end of the attachment lugs is against over an opposite section of the starter sprocket bent radially outwards.

To a target element with a large number of seconds Obtaining the tongue are made according to one characteristic the invention divides the attachment approaches to to form secondary tongues that extend circumferentially alternate with the attachment approaches and to the goal element belong.

Further features and advantages of the invention result from the detailed description below exercise, for their understanding on the attached drawing is referred to. In it show:  

Fig. 1 is an axial sectional view of a hitch be executed according to the teachings of the present invention; and

Fig. 2 is an exploded perspective view illustrating the cover and the support flange of the counterpressure plate.

In Fig. 1, a coupling unit for motor vehicles is shown.

The coupling unit 10 designed as a unitary assembly comprises a sequence of adjacent, generally annular and coaxial parts along the axis XX of the coupling unit. To these ringförmi gene parts, arranged axially one behind the other, a clutch cover 12 , a diaphragm spring 14 , a pressure plate 16 , a clutch disc 18 and a Ge genanpreßplatte 20th

The counterpressure plate 20 is rotatably attached to the crank shaft 25 of the internal combustion engine of a motor vehicle, to which it is fastened by means of a supporting flange 22 in the form of an annular disk, the central part 24 of which is attached to the crank shaft 25 by screws 26 .

The counterpressure plate 20 is an annular casting, which is axially limited by a first, generally transversely directed surface 28 on which an annular ring 30 of the support flange 22 rests, which is made of metal here, and is delimited by an opposite ra diale surface 32 , which is a machined surface that forms one of the friction surfaces for the clutch disc 18 .

The clutch disc 18 here consists essentially of a generally annular support plate 34 , on the opposite surfaces of which a continuous annular friction lining is attached.

A first friction lining 36 is intended for interaction with the radial friction surface 32 of the counterpressure plate 20 , while the opposite friction lining 38 is provided for interaction with a radial friction surface 40 which forms one of the two surfaces which limit the counterpressure plate 20 , which is a generally annular casting that is axially delimited from the friction surface 40 by a generally transverse surface 42 .

According to a known design, the support plate 34 of the friction linings 36 and 38 is provided via an internally grooved central hub 35 for connection to a gear shaft 37 , for example with the input shaft of the motor vehicle transmission, which is rigid or with the insertion of a torsional vibration damper 44 with circumferentially effective Springs in known ter design can be done, which will not be described in more detail at this point.

The transverse surface 42 of the pressure plate 16 comprises a row of projections 46 which are angularly evenly divided and which each extend axially above in the direction of the recessed clutch cover 12 to form support points for the outer circumferential region 48 of the annular spring washer 50 , which forms the outer peripheral part of the diaphragm spring 14 . As a variant not shown, the edition is carried out continuously.

The diaphragm spring 14 comprises an annular outer peripheral portion 50 in the form of a plate spring which is inserted ela stically between the projections 46 of the pressure plate 16 and an annular support rib 52 which extends raised to the inside of the clutch cover 12 and on which the inner peripheral portion 54 of the plate spring comes to rest, which is extended inwards by a central part, which is divided into radial fingers 55 , which is done by slots that separate the fingers 55 in pairs from each other.

The task of the plate spring 14 is to act axially on the pressure plate in the direction that corresponds to the axial clamping of the clutch disc 18 between the friction surfaces 32 and 40 .

The here made of metal with a recessed shape clutch cover 12 consists essentially of an overall transversely aligned annular plate 56 which forms the bottom of the cover 12 and which near its outer peripheral edge 58 has an axially aligned annular cylindrical bezel 60 which Appendices comprises, according to a known construction be a relative axial displacement of the pressure plate 16 in relation to the cover 12 , the attachment means being used directly between the pressure plate 16 and the cover 12 .

The attachments here consist of elastic tongues 59 , which are fixed at one end, for example by Aufnie th, to the outer peripheral edge 58 of the plate 56 which forms the bottom of the cover 12 , and with its other end to the pressure plate 16 .

The attachment here is carried out using rivets 61 .

As a variant, it can be carried out with the aid of screws, bolts or any other type of fastening element. Bores are machined in the edge 58 in order to provide access to the heads 63 of the rivets 61 for fastening the tongues 59 to the pressure plate 16 . The friction surface 40 of the pressure plate 16 has local recordings for access to said rivets.

In this context it should be noted that in FIG. 2, neither the worked into the edge 58 holes for the access to the heads of the rivets 61 or the deep-drawn areas of the clutch cover 12 in angular form (upper part of Fig. 1) are shown, which serve to fasten the tongues 59 on the cover 12 .

The tongues 59 are first attached to the edge 58 after the diaphragm spring 14 has already been attached to the cover 12 , whereupon the other end of the tongues 59 is attached. In this way, a first uniform sub-group is obtained, which comprises the pressure plate 16 , the diaphragm spring 14 and the cover 12 .

It should also be noted that the coupling is a "pressed" version, where the diaphragm spring 14 is tiltably attached to the clutch cover 12 . Normally, the diaphragm spring 14 comes to rest on the rib 52 of the cover 12 , which forms a primary support for the diaphragm spring 14 , whereby, by means of the projections 46, it acts on the pressure plate 16 in the direction of the counterpressure plate 20 by the friction linings 36 , 38 between the plates 16 and clamp 20 .

As a result, the torque is transmitted from the crankshaft 25 via the clutch disc 18 to the input shaft 37 of the transmission.

The clutch is engaged.

In order to disengage the clutch, the fingers 55 of the diaphragm spring 14 are acted on by pressure with the aid of a release bearing 39 on the inner end 57 . This then tilts and then lies on the secondary support described below.

The tongues then cause the return of the pressure plate 16 in the direction of the bottom of the cover 12 so that the friction linings 36 and 38 are released.

The clutch is then disengaged.

The diaphragm spring 14 is tiltably supported on the cover 12 in a manner known per se, which is done by means of connecting lugs 13 which are made in one piece by stamping and bending from the cover, which consists of deep-drawn sheet metal.

The approaches 13 are substantially axially aligned and go through the diaphragm spring into openings which it has at the level of the starting point of the fingers 55 , that is, on the inner edge 54 of the plate spring 50th

These openings form the widened blind hole end of the slots which separate the fingers 55 from one another. Behind the diaphragm spring, the approaches at their free end radially outward, that is, in the opposite direction to the axis XX of the unit, ge bent to form a locking bend for an annular ring, which comes to rest on the other surface of the membrane Fe 14 . This axially inserted between the diaphragm spring 14 and the locking bend ring rim has a frustoconical shape and has a rounded shape on its outer edge for contact with the diaphragm spring 14 and the formation of a secondary layer opposite the primary layer 52 .

A variant (not shown) can of course be a Axial washer between the locking bend and the ring wreath are inserted.  

As a variant, the connecting lugs can be replaced by punch bolts, the head of which is profiled so that a secondary support is formed, these spacers carrying a ring which is inserted between the bottom of the cover 12 and the diaphragm spring 14 to form the primary support .

The coupling can of course also be a drawn version, the plate spring 50 then resting on its outer edge on an annular rib of the cover 12 and on its inner edge on a jump of the pressure plate 16 .

In this case, with the help of the release bearing 39 is acted on the inner end of the fingers 55 of the membrane spring to disengage the clutch.

In addition, the clutch disk can also comprise only one friction lining, in the interior of which the support disk 34 is embedded. This friction lining has two surfaces in order to interact with the friction surfaces 32 and 40 .

The clutch cover 12 also includes fastening means 62 , which extend axially from its outer circumferential edge 58 in the direction of the counterpressure plate 20 and allow the attachment of the cover 12 to the counterpressure plate 20 , so that a coupling unit is formed, which forms an assembly that , for example by a series of rivets 64 , can be attached and attached to the support flange 22 .

As will be explained in more detail below, the fastening means are supply lugs 62 axial Fixed To which are integrally worked out by punching and bending from the axially aligned cylindrical ringförmi gen enclosure 60 of the annular plate 56 extended ver the externa ßeren peripheral edge 58th The bezel 60 therefore has a comb shape, the lugs 66 forming the free ends of the bezel 60 .

The rivets 64 are arranged radially below the fastening means 62 , that is in the direction of the axis XX. They are also attached to the counterpressure plate 20 , their head 65 being inserted into a receptacle in the form of a depression which is worked into the friction surface 32 of the counterpressure plate 20 . The shaft of the rivet 64 passes through the counterpressure plate 20 to axially extend into a bore which is worked into the collar 30 of the support flange 22 .

As a variant, the rivets can be replaced by screws will.

For a given radial space requirement of the hitch be unit 10 , which is determined, for example, by the housing 11 , which is part of the transmission and in which the clutch unit 10 is arranged inside, results in a large height for the friction linings 36 , 38 thanks to the fastening means 62 .

Otherwise, the torsional vibration damper 44 remains unaffected in all cases and can be used as a standard version, with the clutch cover being simplified.

There now follows a more detailed description of the means for fastening the clutch cover 12 to the counterpressure plate.

The fasteners 62 consist of a series of axially aligned Befestigungsansät zen 66 extending axially from the free axial closing edge 100 from, which is axially aligned in the direction of the support flange 22 , that is, in the direction of the counterpressure plate 20th The edge 100 forms the free axial end of the bezel 60 .

The lugs 66, which are designed as pins, are evenly distributed, for example, in four groups of six at the outer edge of the cover 12 , as can be seen in FIG. 2. These approaches 66 like to extend the bezel 60 in the direction of the support flange 22nd

Each group 66 of four attachment lugs 66 is, here with installation play, inserted into an axially aligned passage 68 , which is incorporated into the outer peripheral edge 70 with a generally annular cylindrical shape of the carrier flange 22 . The divided lugs 66 also take over a function for centering the cover 12 in relation to the support flange 22 .

In the figures, each passage 68 designed as a mortise hole is designed in the form of a notch which is continuous at both ends, that is to say in two opposite annular transverse surfaces 21 and 23 of the support flange 22 of the counterpressure plate 20 .

Each notch 68 is delimited radially inwards by a base 74 and opens radially outwards in the outer peripheral edge 70 of the support flange 22 .

The width of each notch, which is measured along the circumferential direction and is limited by its two parallel flanks 76 , is slightly larger than the circumferential width of a group of four fastening approaches 66 , so that the latter can be inserted axially into the notch 68 , what with occurs view of the Fig. 1 and 2 from right to left. This creates a tongue and groove connection.

In the figures, the support flange 22 carries at its periphery a generally annular starter ring gear 78 which includes an annular cylindrical body 79 and teeth 82 .

The starter ring gear 78 is attached by shrinking and / or welding on the outer cylindrical peripheral edge 70 of the support flange 22 of the counterpressure plate 20 .

In the example illustrated in Fig. 1 mounting position of the starter ring gear 78 limits the cylindrical inner surface 81 of the annular cylindrical body 79 of the starter ring gear 78 radially outward passages, which are formed by the notches 68th

The length of each attachment projection 66 is such that it is in the position in which it is inserted into its notch 68 , its free end 90 axially at least at the level of the radial outer surface 23 of the support flange 22 of the counterpressure plate 20 and in the amount of the aligned thereon lateral outer surface of the starter ring gear 78 is located so that a fastening by welding the free ends 90 of the mounting lugs 66 , for example at the same time on the support flange 22 of the counterpressure plate 20 and on the starter ring gear 78 can take place.

The radial thickness of the mounting lugs 66 is et what is smaller than the radial distance between the Bo 74 of the notches 68 and the inner cylindrical bearing surface 81 of the starter ring gear, so that they are used below the starter ring gear 78 , that is, in relation to this inside can be.

The processes for welding the free ends 90 he possible the axial securing of the fastening attachment ze 66 in relation to the support flange 22 of the counter plate 20 and the rotation lock of the starter ring gear 78 in relation to the counterpressure plate 20th

According to one embodiment, the axial securing each fastening projection 66 in relation to the support flange 22 by radially bending the free end piece 90 , which then projects axially beyond the lateral outer surface 90 , inwards or outwards relative to the lateral outer surface 23 of the support flange 22 or opposite to the opposite side face of the ring gear 78 .

The securing can also be done by clamping the free end pieces 90 in the manner of a rivet head or by any equivalent method.

The design of the attachment means 62 which are det gebil by the piece with the skirt 60 of the lid is made of pressed sheet metal 12 lugs 66, is particularly advantageous, as they bind in a simple and economic way, the Ver the lid 12 allows the reaction plate 20 by this axially with regard to the introduction of the lugs 66 in the axial notches 68 , whereupon the relative axial position of the cover 12 in relation to the counterpressure plate 20 is to be adjusted and finally the final fastening, for example by welding, is to be carried out .

The number and arrangement of the attachment lugs 66 and the distribution of the notches 68 depend on the respective applications. The length of the lugs 66 depends on the length of the notches 68 .

As a variant, the axial passages, into which the free ends 90 of the fastening lugs 66 are inserted, can be formed on the circumference of the counterpressure plate 20 instead of in the supporting flange 22 fastened thereon, as is shown in the patent application FR 95.12523 .

The design of the one-piece with the axially aligned cylindrical annular bezel 60 out led fastening approaches 66 is also particularly advantageous in that it has a very small radial space requirement and the conditions for a sufficient annular radial inter mediate space between the bezel 60 and the opposite inner surface of part 11 of the housing of the transmission creates in order in a simple and economical manner a target element 110 , here in a one-piece design with the cover 12 , whose purpose is in particular to be connected to a sensor (not shown), who which is attached to the housing 11 and in connection with the rotating target element 110 , which is rotatably connected to the cover 12 , the determination and measurement of the rotational speed of the cover 12 enables.

According to the teachings of the invention, the Zielele element 110 consists of at least one tongue 112 , which is made in one piece by stamping and bending with the annular skirt 60 of the lid 12 .

As can be seen in the figures, the main tongue 112 forming the target element is generally axially directed, whereby it extends from the free end edge 100 of the annular skirt 60 over a length which is significantly smaller than that of the fastening attachments 66 , And in relation to these attachment lugs 66 is offset radially outwards.

For this purpose, the tongue 112 is connected via an angled section 114 to the free axial end edge 100 .

The length of the tongue 112 is sized so that its free axial end edge 116 extends relative to the opposite lateral inner surface of the Anlas serzahnkranzes 78, against which they are spaced axially, i.e. with axial play is arranged.

In order to improve the measurement of the rotational speed of the cover 20 and / or its acceleration, it is also possible to simultaneously carry out a whole row of secondary tongues 112 'in one-piece implementation with the annular rim 60 ', which are angularly uniform along the annular rim solution 60 are distributed. These tongues 112 'also belong to the target element 110 .

On average through a transverse plane, the design and profile of each of the secondary tongues 112 'are identical to those of the tongue 112 , which forms the main target element.

The secondary tongues 112 'are therefore in relation to the mounting lugs 66 radially outwards ver, which is made possible by the angled portion 114 .

However, in order to distinguish the main target element 112 from the secondary tongues 112 ', their width, measured tan gentially, is significantly smaller than the tangentia le width of the main tongue 112 , as can be seen in FIG. 2.

When the cover 12 rotates, the stationary sensor (not shown) successively detects the passing of a large series of secondary tongues 112 'and then, once per revolution, the main tongues 112 .

According to a known design, the fact that metal tongues 112 and 112 'pass one after the other in front of a sensor provided for this purpose, the possibility is created that this sensor can detect representative signals for the rotation of the cover 12 .

The annular bezel 60 is designed in the form of a double comb, which comprises a radially inwardly arranged and formed by six groups of four BEFE stigungsans approaches 66 comb and a wide ren comb, which is arranged radially outward and through the series of secondary tongues 112th 'And is formed by the main tongue 112 .

As a variant, the annular circumferential border of the lid with their attachment lugs and their tongues formed as a target element in one piece Design in the form of a on the body of the lid set part.

The free end of the secondary tongues 112 'and / or the tongue 112 can of course come to rest on the starter ring gear 78 in order to determine the position of the cover 12 .

The free end pieces 90 of the lugs 66 can then be simply clamped or bent radially in position on the supporting flange 22 and / or the starter tooth ring 78 by the aforementioned method. This is all the more true since the attachment approaches are divided.

In all cases, there is a good measurement with egg nem economic sensor, since the target element 110 is offset radially outwards in relation to the lugs 66 and the bezel 60 , with a large radial distance between the target element 110 and the counter-pressure plate designed in a simple form 20 exists.

As should be understood and as can be seen from Fig. 2, each group of mounting sets 66 (one group per passage 68 ) is divided into four sets 66 to form secondary tongues 112 ', which are on the circumference with the approaches 66th alternate. The tongues 112 'are circumferentially less wide than the attachment lugs.

Thanks to this arrangement, a large number of secondary tongues 112 'can be produced.

This number is dependent on the respective applications and especially on the type of vehicle engine (petrol or Diesel engine).

Claims (17)

1. Coupling unit ( 10 ), in particular for motor vehicles, comprising a structural unit of adjacent, generally annular and coaxial parts, in which a lid ( 12 ), a diaphragm spring ( 14 ) lying on the lid ( 12 ), a pressure plate ( 16 ), which provides a support ( 46 ) for the diaphragm spring ( 12 ) and is rotatably connected to the cover ( 12 ) by means of attaching means ( 60 ), the axial displacement of the pressure plate ( 16 ) in relation to the cover ( 12 ) enable a clutch disc ( 18 ), which can be connected to a driven shaft, and a counterpressure plate ( 16 ), which is attached to the cover ( 12 ) by means of fastening means ( 62 ) arranged on the outer edge of the clutch unit ( 10 ), axially are arranged one behind the other, the counterpressure plate ( 16 ) can be attached by a series of fastening elements ( 64 ) on a rotationally fixed to a driving shaft supporting flange ( 22 ) and the ceiling l on its outer edge comprises an axially aligned annular skirt ( 60 ), from which a series of fastening lugs ( 66 ) are worked out, they extend axially and each axially pass through a corresponding axially aligned passage ( 68 ), which is on the circumference ( 70 ) the counterpressure plate ( 16 ) or the support flange ( 22 ) is designed to open axially behind the radial friction surface ( 32 ) facing away from the radial surface ( 72 ) of the counterpressure plate ( 20 ) or the support flange ( 22 ), wherein the free end piece ( 90 ) at least some attachment lugs ( 66 ) in relation to the counterpressure plate ( 20 ) or to the support flange ( 22 ) is held axially, characterized in that the cover has at least one target element ( 110 ) for a sensor for detecting the Circumference of the cover comprises, which is made in one piece with said annular casing ( 60 ). 2. Coupling unit according to claim 1, characterized in that the target element ( 110 ) consists of at least one axially aligned tongue ( 112 ) which is arranged radially outwards in relation to the annular border ( 60 ). 3. Coupling unit according to claim 2, characterized in that the fastening supply approaches ( 66 ) and the tongue ( 112 ) extend axially from an axial end edge ( 100 ) of the annular Einfas solution ( 60 ). 4. Coupling unit according to one of claims 2 or 3, characterized in that an axial play between the free end ( 116 ) of the tongue ( 112 ) and the opposite portion of the outer edge of the radial friction surface of the counterpressure plate ( 20 ) or the support flange ( 22nd , 78 ). 5. Coupling unit according to one of claims 2 or 3, characterized in that the free end ( 116 ) of the tongue ( 112 ) on the radial friction surface of the counter pressure plate ( 20 ) or the support flange ( 22 ) comes to rest. 6. Coupling unit according to one of claims 2 to 5, characterized in that the annular border ( 60 ) of the cover comprises a series of angularly distributed tongues ( 112 , 112 '), un ter which at least one ( 112 ) of the tongues, which as Main tongue ( 112 ) is referred to, which forms said target element ( 110 ), said tongues being offset radially outward in relation to the annular skirt ( 60 ). 7. Coupling unit according to claim 6, characterized in that the main tongue ( 112 ), which forms the target element ( 110 ), has a width, measured along the tangential direction, which is different from the width of the other tongues ( 112 ') ver . 8. Coupling unit according to claim 7, characterized in that said other ren tongues ( 112 ') are angularly evenly distributed. 9. A coupling unit according to claim 8, characterized in that the Befestigungsan sets (66) are divided circumferentially and in that the said tongues (112 ') alternate with the lower part of th fastening lugs (66). 10. Coupling unit according to one of the preceding claims, characterized in that the free end ( 90 ) of the fastening lugs ( 66 ) on the counterpressure plate ( 20 ) or on the support flange ( 22 , 78 ) is welded. 11. Coupling unit according to one of claims 1 to 10, characterized in that the free end ( 90 ) of the fastening lugs ( 66 ) is bent ra dial. 12. Coupling unit according to one of the preceding claims, characterized in that each passage ( 68 ) is an axial notch ( 68 ) in the outer peripheral surface ( 70 ) of the counter pressure plate ( 20 ) or the support flange ( 22 ) forms out and is open radially outwards. 13. Coupling unit according to one of the preceding claims, characterized in that the counter pressure plate or the support flange ( 22 ) on its / its outer edge ( 70 ) carries a starter ring gear ( 78 ) and that each passage ( 68 ) in relation to the starter ring gear ( 78 ) is arranged radially inwards. 14. Coupling unit according to claim 13 in combination with claim 12, characterized in that the starter ring gear ( 78 ) on a in the outer peripheral surface ( 70 ) of the counterpressure plate or the support flange ( 22 ) incorporated support surface ( 82 ) is attached, the radial depth is smaller than that of the axial notch ( 68 , 74 ). 15. Coupling unit according to claim 13 or 14 in combination with claim 10, characterized in that the free end ( 90 ) of the fastening supply approaches ( 66 ) on the starter ring gear ( 78 , 88 ) is welded ver. 16. Coupling unit according to claim 13 or 14 in combination with claim 11, characterized in that the free end ( 90 ) of the fastening supply approaches ( 68 ) relative to an opposite section ( 88 ) of the starter ring gear ( 78 ) is bent radially outwards. 17. Coupling unit according to one of claims 15 and 16, characterized in that the free end ( 116 ) of the tongue ( 112 ) with the Anlas serzahnkranz ( 78 ) comes into contact.