DE102022118957A1 - Disc spring diaphragm, dual mass flywheel and assembly method - Google Patents

Abstract

The invention relates to a plate spring membrane (42) for a dual-mass flywheel (10) for attachment to a secondary disk (56) of the dual-mass flywheel (10), having at least two, preferably three or more, positive-locking segments (44), each as a projection, opposite one another around a central bore (54) on a central axis (ZA) of the plate spring membrane (42), and for insertion, in particular hooking and/or snapping, into a preferably central opening (24) of a primary flywheel (20) of the dual-mass flywheel (10), in particular a sensor cover (22) of the dual mass flywheel (10). The invention further relates to a dual-mass flywheel (10) with at least one positive locking segment (44) and a method for assembling a dual-mass flywheel (10).

Description

The invention relates to a plate spring membrane for a dual-mass flywheel. The plate spring membrane is intended for attachment to a secondary disk of the dual-mass flywheel. In addition, the invention relates to a dual-mass flywheel for dampening vibrations about a central axis, having a primary flywheel and a secondary flywheel, the primary flywheel and the secondary flywheel being operatively coupled around the central axis via an arc spring and along the central axis via a plate spring membrane or plate spring. The invention further relates to a method for assembling a dual-mass flywheel.

Dual-mass flywheels can be used or integrated as vibration absorbers for vibrations, especially torsional vibrations, in rotating drive trains. A dual-mass flywheel can be attached to the drive train for this purpose. Due to the desired vibration-dampening relative mobility of the primary flywheel and the secondary flywheel to one another, mounting the dual-mass flywheel in a drive train is associated with the problem that the drive train and the dual-mass flywheel do not always fit together straight away for attachment.

The DE 10 2018 126 438 A1 shows a generic plate spring membrane and a generic dual-mass flywheel. The primary flywheel and the secondary flywheel must be transported precisely aligned with each other in order to be mounted in a drive train.

Therefore, the object of the invention is to provide a plate spring membrane, a dual-mass flywheel and a method in which the assembly effort is lower and the transportability of the dual-mass flywheel is improved.

According to the invention, the object is achieved by a plate spring membrane according to claim 1, by a dual-mass flywheel according to claim 2 and by a method according to claim 9. Advantageous developments of the invention are specified in the subclaims.

According to the proposal, the plate spring membrane has at least two, preferably three or more, form-fitting segments, each as a projection, opposite one another around a central bore of the plate spring membrane located on a central axis, and for insertion or insertion or insertion, in particular hooking and / or snapping , are formed in a preferably central opening of a primary flywheel of the dual-mass flywheel, in particular a sensor cover of the dual-mass flywheel.

The form-fitting segments can be made in one piece with the plate spring membrane. The form-fitting segments can be designed as a clip that engages in an opening or can have a clip. The form-fitting segments can be inserted, in particular hooked or snapped, into an opening or central bore with little effort, for example in the primary flywheel, in particular in a sensor cover of the primary flywheel. This can result in a positive connection in the direction of the central axis and a frictional and/or positive connection around the central axis, namely between the primary flywheel and secondary flywheel. Individual form-fitting segments have the advantage of being slightly elastic and plastically deformable and/or being able to be easily broken in order to break the form-fitting connection. The positive connection must be able to be created at least once. When the positive locking is then eliminated, the condition or shape of the positive locking segments is no longer important. For example, the positive locking can be canceled simply by applying a sufficiently high torque between the primary flywheel and secondary flywheel when the drive train is started up, which breaks and/or plastically deforms the positive locking segments.

The plate spring membrane is therefore advantageously proposed as an independent invention with which a commercially available dual-mass flywheel can be improved in a simple manner. The known dual-mass flywheel equipped with the plate spring membrane can be assembled more easily and transported more securely against damage and/or rotation of the individual parts of the dual-mass flywheel relative to one another thanks to the plate spring membrane according to the invention.

The aforementioned object is further achieved by a dual-mass flywheel, which is provided for vibration dampening about a central axis and has a primary flywheel and a secondary flywheel, the primary flywheel and the secondary flywheel being operatively coupled around the central axis via an arc spring and along the central axis via a plate spring membrane . Damping means can also be used for the respective effective coupling. The dual-mass flywheel, the central axle, the primary flywheel, the secondary flywheel and/or the bow spring can also be the one described above.

According to the proposal, it is provided that the primary flywheel, the secondary flywheel and / or the plate spring membrane has at least one positive locking segment designed as a projection, with which a, at least once, releasable positive lock can be produced between the primary flywheel and the secondary flywheel around the central axis and along the central axis, preferably wherein the plate spring membrane is designed according to claim 1. In particular, the form-fitting segment is a component of the dual-mass flywheel, which can remain in the dual-mass flywheel even when in use or after assembly in the drive train - at least until after the first engine start.

The form-fitting segment in particular ensures or is designed to ensure that the position of the primary and secondary flywheel relative to one another is as fixed or fixable as possible, preferably with regard to a displacement along and a rotation about the central axis, more preferably with regard to displacements and/or or rotations also transversely to the central axis, i.e. with respect to other axes and directions, so that assembly or assembly is simplified. For example, torsional movements or tilting of the primary and secondary flywheels relative to each other can be easily avoided.

The dual-mass flywheel is preferably intended for a motor vehicle, in particular for a drive train of the motor vehicle, preferably with an internal combustion engine. The dual-mass flywheel is preferably rotatably arranged on or between a crankshaft and a clutch.

The primary flywheel (with a primary disk) and the secondary flywheel (with the secondary disk) are typically assembled into an assembly that is rotatable or rotatable about the central axis and can be rotated about this axis relative to one another, for example against the spring force of the bow spring . In addition, the plate spring membrane - typically a part of the secondary flywheel or attached to the secondary disk - is usually arranged prestressed between the secondary disk and the primary flywheel in order to form a basic hysteresis, especially in the axial direction. Vibrations, which are caused in particular by an uneven drive torque of the internal combustion engine, which is usually designed as a piston engine, are canceled out by the dual-mass flywheel.

Typically, the primary flywheel, in particular the primary disk, has an outer ring gear. In addition, the secondary flywheel, in particular the secondary disk, typically has a hub, which can in particular be toothed on the inside. Due to the desired vibration-dampening relative mobility of the primary flywheel and the secondary flywheel to one another, thanks to the invention, mounting the dual-mass flywheel in a drive train has the advantage that the toothing and/or mounting means between the drive train and the dual-mass flywheel can fit together better straight away.

A positive fit blocks relative movement between two parts. A positive fit can block movements in one or more directions or around one or more axes. Technically-related or minimal movements during play are typically not excluded.

The form-fitting segment can be a projection, in particular a projection of the secondary flywheel and/or the primary flywheel; However, it is preferred that the projection is assigned to the secondary flywheel or rotates with it, in particular through, for example, a direct connection to the secondary disk.

The form-fitting segment can be designed or provided for insertion, in particular hooking and/or snapping, into the primary flywheel or the secondary flywheel. In particular, the form-fitting segment can be made to hook and/or snap into place with further prestressing of the plate spring membrane, so that a frictional connection is preferably created by the prestressing. In other words, the positive locking can be produced by means of the positive locking segment with axial prestressing of the plate spring membrane and/or axial displacement of the secondary flywheel relative to the primary flywheel. This also makes it easy for a fitter to see whether there is a positive fit.

The form-fitting segment can be formed from a sheet metal section, for example so that the form-fitting segment can be made to hook and/or snap into place while bending the sheet metal section in a resilient manner or with elastic deformation. This makes it easier to create a form fit because a game can be equalized.

The form-fitting segment can be provided, in particular in one piece, on the plate spring membrane. The plate spring membrane, together with the form-fitting segment(s), can therefore be made of a sheet metal material getting produced. This ensures low manufacturing costs and a basically captive, reliable hold.

The secondary flywheel typically has a hub and a flange. Hub and flange can be connected to one another, for example riveted. The secondary pulley has the hub and the flange. The plate spring membrane can be arranged between the hub and the flange and can be connected to the secondary disk in this way.

The form-fitting segment can also be provided separately from the plate spring membrane on the secondary flywheel, more precisely on the secondary disk. Like the plate spring membrane, the form-fitting segment can also be a separate part from the secondary disk. In addition, for safe operation, it is preferred if the plate spring membrane and/or the form-locking segment(s) are permanently fixed to the secondary disk, in particular riveted or screwed.

The form-fitting segment can be fastened or fastened to the secondary disc in the sense of an individual part or as part of a disc. This disc can, for example, be riveted like the plate spring membrane. In particular, the disc can be riveted together with the plate spring membrane. In other words, the disk can be riveted to the secondary disk with the positive locking segment(s), in particular away from the plate spring membrane. For example, the disc can be riveted to the outside of the flange, while the disc spring membrane can be riveted between the flange and the hub. In other words, the disk or the form-fitting segment can be attached directly to the flange and/or at a distance from the plate spring membrane. This creates design flexibility, for example for retrofit solutions.

Basically, at least one form-fitting segment is provided for insertion, in particular hooking and/or snapping, into one or the opening of the primary flywheel. Two, three or more of such a form-fitting segment can also be provided. In particular, the form-fitting segments are distributed circumferentially around the central axis and/or arranged opposite one another. This means that adjacent form-fitting segments and/or groups of form-fitting segments form an at least approximately equal angle to one another around the central axis. In principle, at least three form-fitting segments should be arranged distributed in such a way as to center the parts to the central axis and to avoid tilting of the parts transversely to the central axis. In the case of three form-fitting segments, these can each be spaced apart by approximately 120 degrees or two identical and one different angles (with the sum of the angles being 360°) can be provided as the distances between the three form-fitting segments, for example 150°, 150° and 60°.

Preferably, the form-fitting segment is a predetermined breaking point or has a predetermined breaking point. In this case, the predetermined breaking point is intended to break and/or deform when the dual-mass flywheel is put into operation. If the predetermined breaking point is deformed or broken, the positive connection can no longer be achieved, but this can be left aside because the assembly has already taken place. This ensures that after assembly the form-fitting segment is no longer arranged in a position in which it can unintentionally form a form-fit. This also enables acoustic feedback that can be monitored during commissioning. Any broken parts will be destroyed and/or shredded during operation of the coupling.

It is particularly advantageous if the form-fitting segment hooks into one or the preferably central opening of the primary flywheel and/or is locked there. In particular, the central opening is provided on one or the encoder cover, which is part of the primary flywheel and partially covers the secondary flywheel which is essentially accommodated in the primary flywheel. In the middle of the central opening, a hub of the secondary flywheel is typically accessible for torque transmission. The plate spring membrane is typically supported against the encoder cover and can preferably slide on a membrane ring during operation, i.e. during relative movement of the primary and secondary flywheel around the central axis. The form-fitting segment can thus be viewed from outside the dual-mass flywheel if the form-fitting connection is present.

The opening of the primary flywheel or the encoder cover can have a recess and/or a shoulder for engaging the positive locking segment. A recess can be provided for each form-fitting segment, against which the form-fitting segment can abut about the central axis, in particular can be deformed when it abuts. This makes it possible to influence how strong the positive locking effect is, i.e. what torque is necessary to remove the positive locking connection. It is also easy to influence the position in which the primary and secondary flywheels can be brought into positive connection with one another.

The shoulder typically runs around an axis of symmetry - in this case the central axis is continuous. Produced in a turning process, a turning tool would be able to remain in the shoulder without collision when the workpiece is completely rotated. In contrast, the recess is typically interrupted around the axis of symmetry, for example by a projection. The turning tool would collide here when the workpiece rotates. In this respect, the recess can bring about a positive connection around the axis of symmetry with the positive connection segment, while in the case of the shoulder around the axis of symmetry, primarily a frictional connection or force connection can be generated with the positive connection segment. In any case, a shoulder is typically also a recess, while a recess (at least on a turned part) does not always have to be a shoulder.

The task is further solved by a method for assembling a dual-mass flywheel. In particular, the method provides the dual mass flywheel described above. The dual mass flywheel provided can have the previously described plate spring membrane as a plate spring membrane. It is particularly advantageous that the form-fitting segment is inserted, in particular hooked and/or latched, into one or the preferably central opening of the primary flywheel or the secondary flywheel to produce the form-fitting which can be released at least once. An insertion can also be understood as an introduction. This means that the dual-mass flywheel is fixed in itself or the primary flywheel and the secondary flywheel are fixed to one another, which facilitates the subsequent attachment of the dual-mass flywheel in a drive train. This also creates cost-effective transport security.

Preferably, the secondary flywheel or secondary disk is moved relative to the primary flywheel along the central axis with increasing prestress of the plate spring membrane in order to produce the positive connection that can be released at least once. In this way, the preload of the disc spring can be used to bring about a frictional connection in addition to the positive connection. In addition, the positive connection can be recognized from the outside in that it can be seen with the naked eye whether the secondary flywheel is displaced relative to the primary flywheel. This also ensures that if there is no positive connection, a distance is maintained from the parts that move relative to one another.

In particular, the above-described plate spring, the above-described dual-mass flywheel and the above-described method enable the positive connection to be released or the fixation between the primary and secondary flywheel to be removed without a further assembly step, namely by releasing the positive connection when starting up the drive train, in particular after applying the method according to the invention, happens automatically. For example, a starter that can attack the outer ring gear can cause the positive locking segments to break.

In the context of the above-described and subsequent disclosure, the abbreviation “or” stands as a short form for “respectively” and is intended to indicate alternative, essentially equivalent and/or synonymous features or terms in order to convey the idea or meaning of using a feature or term to bring closer. “Respectively” can always be replaced with “and/or”.

• 1: ein Zweimassenschwungrad nach dem Stand der Technik in einem Halbschnitt,
• 2A-B: ein erstes erfindungsgemäßes Zweimassenschwungrad mit Formschlusssegmenten an einer Tellerfedermembran jeweils in einem Halbschnitt,
• 3 die Tellerfedermembran der 2A-B in einer perspektivischen Ansicht, und
• 4A-B ein zweites erfindungsgemäßes Zweimassenschwungrad mit Formschlusssegmenten separat von einer Tellerfedermembran jeweils in einem Halbschnitt.

The invention is explained below by way of example with reference to the accompanying drawings using preferred exemplary embodiments, whereby the features shown below can represent an aspect of the invention both individually and in combination. Show it:

• 1 : a dual mass flywheel according to the prior art in a half section,
• 2A-B : a first dual-mass flywheel according to the invention with positive locking segments on a plate spring membrane, each in a half section,
• 3 the plate spring membrane of the 2A-B in a perspective view, and
• 4A-B a second dual-mass flywheel according to the invention with positive locking segments separately from a plate spring membrane, each in a half section.

The invention is described below - based on the prior art of a dual mass flywheel 10 in 1 - Described in several embodiments as a development of the prior art. In this respect, features known from the prior art or the same features may not be described in detail again or repeatedly when describing the invention.

The 1 shows a dual-mass flywheel 10 for rotating or dampening vibrations about a central axis according to the prior art. A primary flywheel 20 is resiliently applied around the central axis ZA against a secondary flywheel 40 by means of bow springs 12. There is an active coupling or active connection between Primary flywheel 20 and secondary flywheel 40, by means of which torsional vibrations about the central axis ZA can be canceled and by means of which torques can basically be transmitted.

A plate spring membrane 42 is attached, more precisely riveted, to a secondary disk 56 of the secondary flywheel 40. In this respect, the plate spring membrane 42 is assigned to the secondary flywheel 40. The secondary flywheel 40 has an internally toothed hub 48 and a flange 50 riveted to the hub 48, the plate spring membrane 42 being riveted between the hub 48 and the flange 50. The plate spring membrane 42 rests on a membrane ring 46 of the primary flywheel 20 and can slide on it about the central axis ZA.

The primary flywheel 20 of 1 has a primary disk 26 with an outer ring gear 32, into which, for example, a starter pinion can engage. A cover disk 28 is arranged or attached to the inside of the primary disk 26. A spacer disk 30 is arranged or fastened on the outside of the primary disk 25, opposite the cover disk 28. A hub ring 36 is arranged around the cover plate, against which the secondary flywheel 40 can rest, in particular in the direction of the central axis ZA. At least one balancing weight 37 is attached to the primary disk 26.

The primary disk 26 has a sliding shell 34 in which the arc springs 12 are arranged. The bow springs 12 thus form an energy storage device that can be charged and discharged via relative movement of the primary flywheel 20 and the secondary flywheel 40 to one another, and which can thus smooth out an uneven torque curve in a drive train.

A sensor cover 22 is attached to the primary disk 26, in particular riveted or welded, which at least partially covers the bow springs 12 and the secondary flywheel 40. The encoder cover 22 includes the membrane ring 46, on which the plate spring membrane 42 is supported, and a central opening 24 through which the hub 48 projects along the central axis ZA.

As a further development of the state of the art, 2A-B a dual-mass flywheel 10 is shown, the secondary flywheel 40 of which has at least one positive locking segment 44, with which an at least one-time detachable positive lock between the primary flywheel 20 and the secondary flywheel 40 around the central axis ZA and along the central axis ZA can be produced. More precisely, three form-fitting segments 44 distributed circumferentially around the central axis and opposite each other are provided, with only one being visible in this view.

The form-fitting segment 44 is designed as a projection. The projection is assigned to the secondary flywheel 40, more precisely, the projection is a part of the plate spring membrane 42, which is intended for insertion or hooking and snapping into the primary flywheel 20. The positive connection can be produced by means of the positive locking segments 44 under axial prestressing of the plate spring membrane 42 and axial displacement of the secondary flywheel 40 or secondary disk 56 relative to the primary flywheel 20. The form-fitting segment 44 is provided in one piece on the plate spring membrane 42. The form-fitting segment 44 is a predetermined breaking point that can break during startup.

In the 2A is the positive locking segment 44 shown not in engagement in the central opening 24 of the primary flywheel 20. The primary flywheel 20 and the secondary flywheel 40 can move against each other under pretension or relaxation of the bow springs 12 or rotate against each other about the central axis ZA, the plate spring membrane 42 slides in the membrane ring 46. The form-fitting segments 44 are not in a form-fitting manner.

In the 2 B the position of the primary flywheel 20 is changed relative to the secondary flywheel 40. Namely, the form-fitting segment 44 is in engagement with the opening 24, more precisely in engagement with a shoulder 38 over a limited angular range around the central axis ZA or a recess 39, with the plate spring membrane 42 opposite 2A is further biased. The secondary disk 56 is basically arranged further away from the primary disk 26 so that all positive locking segments 44 can come into engagement with the opening 24. The form-fitting segments 44 thus form a form-fitting connection that can be detached at least once. The pretension of the plate spring membrane 42 ensures a positive connection around the central axis ZA, while the shape of the shoulder 38 or the recess 39 ensures a positive connection along the central axis ZA and also around it.

To get from the in 2A in the condition shown in 2 B To reach the state shown, a method of assembly is carried out in which the secondary flywheel 40 is moved relative to the primary flywheel 20 along the central axis ZA with increasing pretension of the plate spring membrane 42. Then it happens that the form-fitting segments 44 can hook or snap into place as shown. If applicable Depending on the design of the form-fitting segments 44 and the shoulder or recess 39, an auxiliary tool may be required here.

To get from the in 2 B shown condition, for example in the in 2A There are various methods to get to the state shown and/or to a state without the presence of the form-fitting of the form-fitting segments 44, which can be detached at least once. The form-fitting segments 44 can be pulled out of the shoulder 38 or the recess 39 along the central axis ZA in order to release the form-fitting. The primary flywheel 20 and the secondary flywheel 40 can also be subjected to torque or rotated relative to one another about the central axis ZA, with the form-fitting segments 44 first transmitting or applying force to a torque between the secondary flywheel 40 and the encoder cover 22. Since the form-fitting segments 44 are preferably designed to be small in relation to the torque that can be transmitted or maximum to be transmitted by the dual-mass flywheel 10, for example in the range of 0.1% to 10% of this torque, mechanical failure of the form-fitting segments 44 then preferably occurs - eg a break and/or a plastic deformation of the form-fitting segments 44 - and the form-fitting is canceled. The positive connection can be canceled using a starter in the drive train.

The 3 shows the plate spring or plate spring membrane 42 of the dual mass flywheel 10 2A-B . The plate spring membrane 42 corresponds to the plate spring membrane 42 according to the invention. The plate spring membrane 42 is also suitable for developing the known dual-mass flywheel 10 into a dual-mass flywheel 10 according to the invention.

Are visible in 3 the three form-fitting segments 44 on the plate spring membrane 42 are each designed as a projection. The form-fitting segments 44 lie opposite one another about the central axis ZA and about a central bore 54 on the central axis ZA. The form-fitting segments 44 are designed for insertion or, more precisely, for hooking and snapping into the central opening 24 of the primary flywheel 20 or the encoder cover 22.

In the plate spring membrane 42 the 3 it is the case that the form-fitting segments 44 are arranged at the transition between a resilient conical section 58 rotating around the central axis ZA and a further section 60 rotating around the central axis ZA. As in the present case, the transition is typically stepped or, in cross section, the sections 58, 60 are arranged at an angle to one another. At this point on the plate spring membrane 42, the form-fitting segments 44 can be easily brought into engagement with the opening 24 when the plate spring membrane 42 is prestressed.

The plate spring membrane 42 of the 3 has an at least essentially flat and disk-shaped fastening section 62 adjacent to the further section 60. The central bore 54 is arranged in the fastening section 62. The fastening section 62 further has a plurality of fastening holes 64, via which the plate spring membrane 42 can be riveted to the secondary disk 56.

As a second further development of the prior art is in 4A-B a dual-mass flywheel 10 is shown, the secondary flywheel 40 of which has at least one positive locking segment 44, with which an at least one-time detachable positive lock between the primary flywheel 20 and the secondary flywheel 40 around the central axis ZA and along the central axis ZA can be produced. More precisely, three form-fitting segments 44 distributed circumferentially around the central axis and opposite each other are provided, with only one being visible in this view.

In contrast to the dual mass flywheel 10 of the 2A-B has the dual mass flywheel 10 4A-B the form-fitting segments 44 are not on or as part of the plate spring membrane 42. In the present case, the form-fitting segments 44 are provided separately from the plate spring membrane 42. The form-fitting segments 44 are arranged in one piece on a disk 52 with a total of three form-fitting segments 44. This disk 52 is riveted together with the hub 48, the flange 50 and the plate spring membrane 42, which does not have any form-fitting segments 44, to or with the secondary flywheel 40, more precisely the secondary disk 56. The form-fitting segments 44 are thus assigned to the secondary flywheel 40.

The dual mass flywheel 10 4A-B is basically exactly like the dual mass flywheel 10 2A-B can be put into a state in which the primary flywheel 20 and the secondary flywheel 40 are fixed to one another. This condition is in 4B shown. There, the three form-fitting segments 44 each engage in the opening 24 on the encoder cover 22, which is provided with a shoulder 38 or a recess 39, or are inserted into it, more precisely hooked and snapped into place. There is a form fit.

The form-fitting segments 44 of the 4A-B are (in contrast to those of the 2AB ) is not part of the plate spring membrane 42, but a separate part of the secondary flywheel 40. The positive locking segments 44 are arranged on the disk 52 and are therefore spaced from the plate spring membrane 42. These positive locking segments 44 are also designed as projections and have a predetermined breaking point, which in this further Case can basically fail independently of the plate spring membrane 42.

Not shown is an embodiment in which the at least one form-fitting segment 44 is assigned to the primary flywheel 20. A disk 52 such as the disk 52 described above can be connected, in particular riveted, to or with the primary flywheel 20, in particular with the primary disk 26. Alternatively or additionally, a plate spring membrane 42 having at least one form-fitting segment 44 can also be assigned to the primary disk 26.

The positive connection of the dual mass flywheel 10, which can be detached at least once 4A-B can be analogous to that 2A-B be canceled or solved.

Reference symbol list

10

Dual mass flywheel

12

bow spring

20

Primary flywheel

22

Encoder cover

24

opening

26

primary disc

28

cover plate

30

spacer

32

ring gear

34

Sliding shell

36

Hub ring

37

Balancing weight

38

Paragraph

39

recess

40

Secondary flywheel

42

Disc spring membrane

44

Positive locking segment

46

Membrane ring

48

hub

50

flange

52

disc

54

Central bore

56

Secondary disc

58

conical section

60

further section

62

Fastening section

64

mounting hole

ZA

central axis

QUOTES INCLUDED IN THE DESCRIPTION

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

Cited patent literature

• DE 102018126438 A1 [0003]

Claims (10)

Disc spring membrane (42) for a dual-mass flywheel (10) for attachment to a secondary disk (56) of the dual-mass flywheel (10), characterized by at least two, preferably three or more, positive-locking segments (44), each as a projection, opposite one another around a central bore (54) on a central axis (ZA) of the plate spring membrane (42), and for insertion, in particular hooking and/or snapping, into a preferably central opening (24) of a primary flywheel (20) of the dual-mass flywheel (10), in particular of a sensor cover ( 22) of the dual mass flywheel (10). Dual-mass flywheel (10) for dampening vibrations about a central axis (ZA), having a primary flywheel (20) and a secondary flywheel (40), the primary flywheel (20) and the secondary flywheel (40) about the central axis (ZA) via an arc spring (12 ) and are operatively coupled along the central axis (ZA) via a plate spring membrane (42), characterized in that the primary flywheel (20), the secondary flywheel (40) and / or the plate spring membrane (42) have at least one form-fitting segment (44) designed as a projection. has, with which a, at least once, releasable positive connection between the primary flywheel (20) and the secondary flywheel (40) around the central axis (ZA) and along the central axis (ZA) can be produced, preferably with the plate spring membrane (42). Claim 1 is trained. Dual mass flywheel (10). Claim 2 , characterized in that the positive locking segment (44) is a projection of the secondary flywheel (40) or the primary flywheel (20), which is designed for insertion, in particular hooking and / or snapping, into the primary flywheel (20) or the secondary flywheel (40). is. Dual mass flywheel (10). Claim 2 or 3 , characterized in that the positive locking can be produced by means of the positive locking segment (44) with axial prestressing of the plate spring membrane (42) and/or axial displacement of the secondary flywheel mass (40) relative to the primary flywheel mass (20). Dual mass flywheel (10) according to one of the Claims 2 until 4 , characterized in that the positive locking segment (44), in particular in one piece, is provided on the plate spring membrane (42) or that the positive locking segment (44) is provided separately from the plate spring membrane (42) on the secondary flywheel mass (40). Dual mass flywheel (10) according to one of the Claims 2 until 5 , characterized in that two, three or more, circumferentially distributed around the central axis (ZA) and / or opposite positive locking segment (s) (44) for insertion, in particular hooking and / or snapping, into a / the preferably central opening (24 ) of the primary flywheel (20) are provided. Dual mass flywheel (10) according to one of the Claims 2 until 6 , characterized in that the form-fitting segment (44) is or has a predetermined breaking point which is intended to break and/or deform when the dual-mass flywheel (10) is put into operation. Dual mass flywheel (10) according to one of the Claims 2 until 7 , characterized in that the form-fitting segment (44) hooks into a/the preferably central opening (24) of the primary flywheel (20), in particular one/of the encoder cover (22), and/or is snapped there. Method for assembling a dual-mass flywheel (10), characterized in that the dual-mass flywheel (10) according to one of Claims 2 until 8th , especially with the plate spring membrane (42). Claim 1 , is provided, and that the form-fitting segment (44) is inserted, in particular hooked and/or snapped, into the preferably central opening (24) of the primary flywheel (20) or the secondary flywheel (40) to produce the form-fitting which can be detached at least once. Procedure according to Claim 9 , characterized in that the secondary flywheel (40) is moved relative to the primary flywheel (20) along the central axis (ZA) with increasing pretension of the plate spring membrane (42) in order to produce the positive connection that can be released at least once.

Images