DE102008009656A1 - torsional vibration damper - Google Patents

Abstract

Torsionsschwingungsdämpfer with a drive-side and an output side transmission element, which are rotatable against each other at least one provided between these damping device with at least one circumferentially effective long coil spring.

Description

The The invention relates to a torsional vibration damper with a drive-side transmission element and a driven-side transmission element, the counter against at least one provided between these damping device at least one circumferentially effective long coil spring are rotatable to each other. The transmission elements have each support or admission areas for the at least one coil spring, and there are in addition between the two transmission elements means for limiting the relative rotation in thrust and / or in the pulling direction provided which is activated in parallel to the at least one coil spring are and thus these energy storage against overuse due to very high torque peaks (impact moments) protect.

In principle, torsional vibration damper, for example by the DE 199 12 970 A1 . DE 199 09 044 A1 . DE 196 48 342 A1 . DE 196 03 248 A1 and DE 41 17 584 A1 known. It is therefore with respect to the basic structure and the principal mode of action of such torsional vibration damper referred to this state and the still cited prior art, so that in this respect a comprehensive description in the present application is omitted.

Of the The present application was based on the object, torsional vibration damper of the type mentioned above with respect to their structure and to improve their function. In particular, an objective of the present Invention between the two transmission elements effective damping device, in particular those formed by coil springs To protect energy storage from overloading. Furthermore, a according to the present invention Fitted torsional vibration damper in particular be simple and inexpensive way to produce and also a great possibility of variation the realizable damping characteristics in particular in the end of the maximum between the two transmission elements ensure possible twist angle.

According to the This is achieved inter alia by that radially within the at least one coil spring at least a stop element is provided, which limits the rotation effected between the transmission elements, wherein the stop element two to ten angular degrees before the maximum allowable compression travel the coil spring is effective. When arranging several over the circumference of the Torsi onsschwingungsdämpfers arranged, parallel effective coil springs, it is useful if each coil spring is assigned at least one stop element.

Especially when using long energy stores that are at least approximate Pre-curved to their mounting radius, it may be appropriate be, although the boundary elements in the circumferential direction one Have curvature.

In Particularly advantageously, for a torsional vibration damper of the type mentioned at least one helical compression spring use find, which at least in places contact their Turns limited the rotation of the transmission elements, being close to this touch and / or touch or shortly after contact between the winding areas the at least one stop element becomes effective. With pre-curved long helical compression springs can be touching Areas of the turns through the with respect to the axis of rotation the torsional vibration damper radially inside Be formed areas of these turns. The effect or the beginning the effect of the stop elements only when touched, ie practically go to block the spring coils or only after one such touch of the turns, may be related with helical compression springs find application, although the individual Spring coils are already touching, still a residual compression path have, for example, by relative movements of the touching Winding areas is enabled, as follows will be explained in more detail. In such a Coil spring is the maximum allowable compression travel from a first Kompressionswegbereich, practically by stop or touching the Windungsbereiche is limited, and a second compression path area, which by sliding on the Turns and allows for the appearance of a permanent Deformation at one of the turns or occurrence of damage the spring is enough. The limiting elements according to the invention should be designed and arranged such that such Damage to a helical compression spring can not occur So the actually approved compression path of a such coil spring within the torsional vibration damper is limited to a size that ensures that the maximum allowable compression travel at which a Damage to the spring could occur, not achieved becomes. Based on the enabled by such a coil spring Relative twist angle between the transmission elements the torsional vibration damper can actually by such a coil spring enabled twist angle by at least one angular degree, preferably at least two or more angular degrees are smaller than the maximum allowable Compression path of such a coil spring corresponding twist angle.

Especially It may be advantageous to have large angles of rotation between to realize the transmission elements, if only provided in the circumferential direction extending energy storage are each assigned to which at least one boundary element is.

The angular or lengthwise design of the stop elements is designed in an advantageous manner such that they come into effect before reaching the load limit of the energy storage. As a result, an overuse of the energy storage is avoided, since by means of the stop elements, the harmful excess moments or the torque peaks are intercepted or partially absorbed. The effect of designed as a stop elements limiting elements can go just before going to block the coil spring between the two transmission elements. In the present case, by the term "go to block the energy storage" the maximum allowable compression state of the energy storage means in a normal helical compression spring, the block state practically corresponds to that state in which at least areas of the spring coils are adjacent to each other and thus a further compression without plastic deformation of the However, there are also helical compression springs in which the mutually adjacent turns are designed in such a way that a residual compression path is made possible even when the individual turns contact one another by sliding together at least some adjacent turns or turn sections, up to the permissible load limit If a helical compression spring configured in this way were additionally compressed, then either individual turns would permanently widen or the spring would be damaged and thus not meh r can fully assume their intended function. To avoid this, the stopper or limiting elements according to the invention can be used. Springs that, although their turns already touch, still have a Restkompressionsweg are, for example, in the WO 99/49234 described.

Especially It may be advantageous if the limiting elements have a torsional rigidity generate on the order of 300 to 2000 Nm / °, preferably of the order of magnitude from 700 to 1800 Nm / °. This can be done with a relatively low deformation angle The limiting elements have very high peak moments, many times over the nominal torque of an internal combustion engine, intercepted or absorbed. The due to certain operating conditions the motor vehicle or the engine occurring peak moments (Impact moments) can be at least of the order of magnitude 2000 and 4000 Nm are and sometimes even larger be.

According to the invention So at least over a small relative twist angle between the transmission elements, the energy storage, the preferably consist of helical compression springs, and the stop elements experience an elastic deformation at the same time. It should be within this low relative torsion also a high potential for energy destruction by, for example, internal friction or hysteresis at least of the Limiting elements forming material and by friction between Spring coils may be present. The twist angle, within which the Limiting elements can be effective, on the order of magnitude from 1 to 8 °. It is useful if this twist angle is in the range between 1 and 4 °.

If necessary, after reaching the maximum allowable degree of deformation the stop elements an additional rigid stop, the Example metallic stop, between the transmission elements come into effect.

As already indicated, it is useful if the Energy storage in each case by at least one helical compression spring are formed and at least a portion of the aforementioned low twist angle, within which the stop elements are deformed, the turns of the helical compression spring already touching, but by sliding on each other the turns another low compression travel of the spring is possible. By the sliding of the turns friction is generated, which also destroy the excess Significantly increases impact energy.

In Advantageously, the energy storage by at least two Helical compression springs, namely an outer and an inner helical compression spring, be formed, wherein a this helical compression springs the other, by sliding on each other the turns allowed compression path, and the other feather on a turn of the turns a practical has fixed block length. By means of a practically solid Block length having helical compression spring is the relative rotation finally limited between the transmission elements, this limitation preferably within the aforementioned further low compression travel of a spring takes place. Thereby will ensure that the load limit of others Helical compression spring is not exceeded. In an advantageous manner Way, the inner spring may have a fixed block length.

It may be particularly useful if the stop or limiting elements at least partially made of plastic. This plastic may for example consist of egg NEM thermoplastic, thermoset or an elastomer. It may also be expedient if the limiting elements consist of a combination of such plastics, for example thermoplastic and elastomer. Preferably, plastic is used which has good mechanical properties even at relatively high temperatures. The materials used should withstand at least a temperature of 160 ° Celsius, preferably a temperature of> 200 ° Celsius. Regarding the properties of such plastics is on the "Motor vehicle technical pocketbook, Duesseldorf, VDI publishing house, 1995 (ISBN 3-18-419122-2)", pages 215 to 221 directed.

The elastic deformability or the resilience of the stop or limiting elements can by appropriate shaping and / or by appropriate selection of this forming material to the respective Application be adapted. So, for example for changing or adapting the elasticity in the corresponding boundary elements slots or recesses be introduced. Furthermore, at least one friction device be provided, which generates a high friction torque and at least in the end region of the possible compression path of the energy storage starts. Such a friction device can also be designed in this case be that their friction effect with increasing Angle of rotation between the transmission elements increases, so rises.

In Advantageously, the stop elements component a friction device or hysteresis. It can the stop elements serve as a friction element at the same time. For this can at least one stop element for generating a friction damping be subjected to force at least in the axial direction.

In Advantageously, the torsional vibration damper Part of an at least two mutually rotatable masses having flywheel be, wherein the transmission elements each at least Part of one of the two masses or at least with such can be rotationally connected.

In Advantageously, one of the transmission elements by at least two axially spaced sidewalls which are radially are externally connected to each other, and the other transmission element by at least one arranged between these two side walls, be formed flange-like component. It can be done in an advantageous manner the drive-side transmission element, the two side walls have and the output side transmission element that have flange-like component.

The Stop elements can each radially within a Coil spring between the two side walls and added be connected with these over a positive connection rotation. The flange-like component can advantageously radial Beaufschlagungsbereiche own, with the circumferential end areas the stop elements interact. The radial loading areas can by radial wing or boom of the be formed flange-like component, which radially outward have such an extent that they simultaneously can serve to act on the coil springs.

Of the Positive connection between a stop element and the side walls can be directed over axially towards each other in an advantageous manner Markings of the side walls take place, which in axial Engage depressions of the stop element. It can, however be useful if the side walls from each other have directional indentations or depressions, in which the stop elements with lateral projections intervention.

The circumferential extension of the embossings in the side walls and the mating contours cooperating therewith, such as depressions of the stop elements, at least be approximately the same size. Especially advantageous It may be when the stop elements axially between the two Side walls are clamped.

The the torsional vibration damper forming components can advantageously form an annular chamber, which absorbs the energy storage or coil springs and at least partially can be filled with a viscous medium.

Advantageously, the energy storage can be designed as long-stroke energy storage, which allow at least a twist angle of 40 °, starting from a rest position of the torsion damper, in the tensile and / or shear direction. The energy storage can have a ratio of length to outer diameter of the order of 6 to 20. The torsional stiffness generated by the energy storage can advantageously be at least at the beginning of their compression in the order of 1 to 8 Nm / °, for example 4 Nm / °. However, as the compression travel increases, the torsional rigidity may also increase. The energy storage can benfedern advantageously formed by screws be compressible and / or on train claimable. The energy storage springs forming can be designed as long-stroke, one-piece helical compression springs. However, these springs can also be formed from at least two circumferentially successively provided helical compression springs. Furthermore, it is possible to provide different helical compression springs nested in each other axially. The inner springs can be effective against the surrounding outer springs over a smaller angle of rotation. The winding ratio of the inner and outer springs can be matched to one another such that the inner and outer springs at least approximately simultaneously reach their maximum compression travel or go to block.

Further Benefits of both constructive and functional nature are in connection with the following description of the figures in more detail explained.

there demonstrate:

1 a partial view of an inventively designed torsional vibration damper,

2 a section according to the line II-II of 1 .

3 a section along the line III-III of 1 .

3a a section along the line IV-IV of 1 .

4 a section along the line VV of 1 , the

5 and 6 a stop element in view and in section along the line VI-VI, and the

7 and 8th Cuts through various design options of stop elements.

The in the 1 to 4 illustrated torsional vibration damper 1 , which is only partially shown here, has a drive-side transmission element 2 , this is a drive-side flywheel 3 includes and a driven-side transmission element 4 , that at least the flange-like component 5 includes, which may be part of a driven side flywheel or may be drivingly connected to such a driven side flywheel.

The torsional vibration damper 1 can thus be part of a so-called dual mass flywheel or form such a dual mass flywheel. Such dual mass flywheels are described in more detail with respect to their basic structure and their general mode of action, for example in the following publications. DE 197 28 422 A1 . DE 196 03 248 A1 . DE 195 22 718 A1 . DE 41 17 582 A1 . DE 41 17 581 A1 . DE 41 17 579 A1 . DE 44 06 826 A1 . DE 199 09 044 A1 and WO 99/49234 ,

In particular, energy storage or helical compression springs, as described in the WO 99/49234 are described, are particularly advantageous for use in the torsional vibration damper according to the invention. Such helical compression springs have the advantage that when touching the spring coils, so practically go on block the spring, still a residual stroke or residual spring travel is made possible by sliding together the adjacent turns regions of already touching turns. The resulting advantages are described in more detail in this document.

The drive-side flywheel 3 has a drive flange 6 who, like, out 1 can be seen, at its radially inner region a sleeve-shaped axial projection 7 carries or has, on, as is known from the aforementioned prior art, a driven side flywheel rotatably mounted can be recorded. Advantageously, the storage required for this purpose may be formed by a sliding bearing, for example, according to the DE 198 34 728 A1 or the DE 198 34 729 A1 can be trained.

For fastening the drive flange 6 on the drive shaft of an internal combustion engine are radially outside the neck 7 and thus also the radial bearing between the two flywheel screw openings 8th in the drive flange 6 intended.

The drive flange 6 bears radially on the outside an axial extension 9 , which is integrally formed here and can accommodate a starter ring gear. At the axial approach 9 is a cover plate 10 attached, which extends radially inwardly and the output-side flywheel, not shown here, axially adjacent, as is known from the aforementioned prior art. The radial drive flange 6 , the axial approach 9 and the cover plate 10 limit an annular space 11 which may be advantageously at least partially filled with a viscous medium, such as fat. In the annular space 11 is a damping device 12 arranged.

In the annular space 11 grab at least radial wing or boom 13 a flange 14 one. The flange 14 is with radially inner areas on a driven side flywheel fastened, for example by means of rivet joints, as is known from the prior art.

The output side transmission element 4 or the flywheel connected thereto is connected in a conventional manner via a friction clutch, not shown, whose clutch disc is receivable on a transmission input shaft, connectable to a transmission.

1 shows the angular position of various components of the torsional vibration damper 1 in the stressed state by helical compression springs 15 formed energy storage 16 , In the unclaimed state of the helical compression springs 15 are the outriggers 13 of the flange 14 axially between the Abstütz- or loading areas 18 that of the components 6 and 10 be worn as well as this 3a evident. This Abstütz- or loading areas can advantageously through in the components 6 and 10 introduced impressions in the form of embossments, as is also known from the aforementioned prior art. The admission areas 18 However, they can also be formed by additional components, which in the annular space 11 taken and with the components 6 and 10 are connected, for example by means of riveted joints and / or welded joints.

It should be mentioned that in 1 only the ends of the helical compression springs 15 symbolically represented. With regard to the configuration and arrangement of such helical compression springs reference is made to the already mentioned prior art.

The energy storage 16 can each only by a helical compression spring 15 be formed, which advantageously in the radially outer region of the annular space 11 can be included. As energy storage 16 However, at least two springs can be used, which are nested in one another. For example, within the through the turns of the helical compression spring 15 be formed space received at least one further helical compression spring. For some applications, several, for example, two helical compression springs within the helical compression spring 15 be provided, which are connected in series. A long energy storage 16 But a long helical compression spring can also be formed from a plurality of successively or in series, relatively short helical compression springs. In this case, at least some of the series-connected individual springs may consist of at least two nested helical compression springs. It may be particularly useful when an intermediate piece is provided between adjacent individual springs. Such spacers are for example by the DE 41 24 614 A1 and the DE 41 28 868 A1 known.

At the in 1 illustrated embodiment are two energy storage 16 provided, which are arranged diametrically opposite and extend approximately 160 degrees of degree. It is expedient if this angular extent of the energy storage 16 in the order of 90 ° to 165 °.

In the illustrated embodiment is radially within the arcuate coil springs 15 formed energy storage 16 in each case at least one limiting element designed as a stop element 19 provided by means of which the relative rotation between the output side transmission element 4 and the drive side transmission element 2 is limited. The boundary elements 19 are also arc-shaped or segment-shaped and in the circumferential direction relative to the transmission element 2 rotation. The limitation of the relative rotation between the two transmission elements 2 and 4 is done by adding areas 17 the radial boom 13 of the flange 14 at the stop elements 19 support. This support takes place after the helical compression springs 15 due to a relative rotation between the two transmission elements 2 and 4 were compressed.

The rotationally fixed connection between the support elements 19 and the transmission element 2 can be done in an advantageous manner by means of a positive connection. For this purpose, the side walls or components made of sheet metal can 6 and 10 radially within the helical compression springs 15 axial, for example pocket-shaped embossments 20 . 21 or characteristics that correspond with appropriately adapted counter contours 22 . 23 the stop elements 19 , for example in the form of axial depressions, cooperate. The markings 20 . 21 as well as the counter contours 22 . 23 are for example from the 3 to 6 removable. Out 4 it can be seen that a stop element 19 a central flat area viewed in the circumferential direction 24 own, the axially between the stampings 20 and 21 is recorded or clamped. In the circumferential direction of the torsional vibration damper 1 considered has a stop element 19 laterally from the middle flat area 24 extensions 25 . 26 , the circumference of the embossings 20 . 21 be supported and by the areas of application 17 of the flange 5 can be acted upon. The latter is in particular out 4 refer to. The peripheral contours or the special design of a stop element 19 are from the 5 and 6 refer to. Out the 2 . 3a and 4 it can be seen that the loading areas 17 of the flange 5 opposite to the original material thickness of the flange 5 are widened, for example, by a corresponding material displacement in the production of the flange 5 can be done. The centrifugal support of the stop elements 19 takes place by means of at least one of the components 6 and 10 , For this purpose are between these components and the stop elements 19 appropriate, coordinated contours provided. In the illustrated embodiment, the embossments 20 . 21 of the components 6 and 10 directed axially towards each other. In a modification of the illustrated embodiment, however, these material deformations or stampings could also be directed axially away from one another and the stop elements 19 could axially laterally have corresponding projections which engage axially in these embossings.

The boundary elements 19 are preferably at least partially made of a plastic having a high damping capacity or a high energy absorption capacity, which preferably also has a high deformation hysteresis. As plastic, for example, a thermoplastic or a thermoset or an elastomer can be used. It may also be expedient if the limiting elements consists of a combination of such plastics, for example thermoplastic and elastomer. Preferably, a plastic is used which has good mechanical properties at relatively high temperatures. The materials used should withstand at least a temperature of 160 ° Celsius, preferably a temperature of> 200 ° Celsius. Regarding the properties of such plastics is on the "Motor vehicle technical pocket book, Duesseldorf, VDI publishing house 1995 (ISBN 3-18-419122-2)", pages 215 to 221 directed. It is therefore important to ensure that the plastic used has sufficient wear resistance, aging resistance and also the required mechanical properties, in particular with regard to the temperature resistance, the compressive strength and the possibly desired elastic deformation potential. This can be done by appropriate shaping of the delimiting elements 19 adapted or modulated.

The boundary elements 19 are preferably in relation to the individual energy storage 16 arranged such that no imbalance within the torsional vibration damper 1 arises. It may be advantageous if the stop elements 19 with respect to the application areas provided in the circumferential direction at a distance of a predetermined angle of rotation 18 are arranged substantially centrally. For some applications, however, it may also be expedient if the stop elements 19 in terms of the areas of admission 18 are arranged eccentrically in the circumferential direction, so that then in tension or Schubverdrehrichtung between the two elements 2 and 4 a larger angle of rotation is possible than in the other relative direction of rotation. The coil spring is then preferably designed such that it is in the end region of the between the elements 2 and 4 possible larger relative twisting angle when the stop elements become effective 19 practically has their maximum permissible compression travel. Preferably, the relative direction of rotation between the elements corresponds 2 and 4 , which allows the larger relative twist angle between these elements, that Relativverdrehrichtung where the highest stop moments occur.

The protective function of the limiting elements 19 runs as follows:
The flange 14 compresses the energy storage 16 until the windings or at least the radially inner regions of these turns touch or practically touch each other. From this state or after a further small angle of rotation, for example in the order of 1 ° to 8 °, the limiting elements 19 or their areas 25 . 26 in the circumferential direction of the flange wings 13 applied. From this twisting state between the transmission elements 2 and 4 are the energy stores 16 and the support members acting as limit stops 19 connected in parallel. Since the preferably at least partially made of plastic stop or limiting elements 19 are significantly stiffer, so have a much higher spring rate than the energy storage 16 formed damper stage, the energy storage 16 protected against overload.

It may be particularly useful if the between the transmission elements, for example 2 and 4 according to the 1 and 2 , effective energy storage are formed by at least two nested helical compression springs, wherein the final Ver rotation limitation between the two transmission elements 2 and 4 by going to block the internal helical compression spring is effected. The block length of the inner spring is preferably dimensioned such that the limiting elements, for example 19 , Have developed a sufficiently large damping effect, together with the go to block the inner spring to protect the outer helical compression spring against overloading. The outer helical compression spring can advantageously in accordance with the teaching of WO 99/49234 be educated. Such a helical compression spring has the advantage that a high friction damping is achieved by sliding together the touching turns.

For However, some applications may also be appropriate be, if the respective energy storage only by the aforementioned external helical compression spring is formed and thus the final Verdrehbegrenzung between the drive-side and the driven-side transmission element by the combined or parallel action of the helical compression springs and the limiting elements is ensured.

For some applications, the combined effect of the outer helical compression spring and the going to block inner helical compression spring may be sufficient to avoid damage within the torsional vibration damper, in particular to prevent overloading of the outer helical compression spring. In such cases, it may be possible to dispense with stop or limiting elements. For some applications, it may also be sufficient to avoid overstressing the helical compression springs when a virtually rigid stop between the flange 5 or its areas of application 17 and the stops formed here by stampings 20 . 21 the drive-side transmission element 2 he follows. The embossings can 20 . 21 be configured so that they touch virtually axially.

Furthermore, as a damping elements effective stop or limiting elements can also be designed and arranged such that they are in the circumferential direction against the stops or stampings 20 . 21 slightly protruding, but are so elastically deformable that even a direct investment between the areas 17 of the flange 5 and the attacks or stampings 20 . 21 can take place. In such an embodiment, the stop or limiting elements serve practically only as an end buffer, in order to ensure a hard metallic stop between the areas 17 and the stampings 20 . 21 to prevent.

An essential objective underlying the invention is therefore to ensure a targeted shutdown of overstressing of helical compression springs, namely to prevent an inadmissible overloading, which would result in a deformation of at least the end turns of such helical compression springs. In particular, such helical compression springs are to be used, in which the adjacent turns are designed such that even with contact at least between areas of the individual turns, so practically at block stress of the spring, a Restkompressionsweg by sliding on each other between the in-contact winding areas possible is, up to the permissible load limit of the corresponding helical compression springs. If such a configured helical compression spring compressed in addition, so at least individual turns would permanently widen or take the spring damage and thus can not fully assume their intended function fully. Springs which, although their turns already touch, still have a Restkompressionsweg are, as already mentioned, for example, in the WO 99/49234 described.

The stop elements according to the invention 19 thus have the function of overload protection for at least individual helical compression springs of the damping device. The stop elements 19 Inadmissible high energy inputs during a rotation between the elements 2 and 4 intercept or buffer.

In some applications, such overstresses or over torques occur only sporadically over the life of the device, so that in these cases the stop elements 19 If appropriate, they can also be designed in such a way that they are at least partially destroyed, ie serve practically as a sacrificial anode, in order to avoid damage to springs of the damper and thus the functionality of the torsional vibration damper 1 continue to guarantee. If the stop elements are destroyed or fail, the function of an overload protection for the helical compression springs 15 by direct stop between the stampings 20 . 21 and the flange-like component 5 or its boom 13 respectively.

How out 4 it can be seen, are the stop areas 25 . 26 and the charging areas 17 coordinated so that virtually a surface contact takes place and thus no Dämpfungsprogressivität is present. At the in 8th illustrated embodiment, at least the areas 25 . 26 the stop element 19 rounded in cross-section, whereby at a deformation of these areas 25 . 26 through the admission areas 17 of the flange 5 a progressive torsional resistance arises.

At the in 7 illustrated embodiment has the stop element 119 opposite to by embossings 20 . 21 stops formed a backlash 127 , so that according to this backlash 127 the stop element 119 can be rotated or moved relative to the transmission element 2 , By appropriate axial clamping of the area 124 the stop element 119 between the stampings 20 and 21 ensures that when a displacement of the stop element 119 a friction hysteresis arises. By means of this friction hysteresis can be a damping of the stop of the areas 17 of flange 5 on the stop element 119 be achieved.

The Embodiments are not limiting to understand the invention. Rather, in the context of the present Revelation numerous modifications and modifications possible, in particular those by combination or modification of individual in conjunction with those in the general description and the description of the figures and the claims described and included in the drawings features or elements or method steps can be formed.

1

torsional vibration damper

2

transmission element

3

drive-end Inertia

4

Output-side transmission element

5

flange-like component

6

drive flange

7

axial approach

8th

screw openings

9

axial approach

10

cover plate

11

annular room

12

attenuator

13

radial Wing or boom

14

flange

15

Helical compression springs

16

energy storage

17

impingement

18

Abstütz- or areas of application

19

stop elements

20

embossings

21

embossings

22

against contours

23

against contours

24

flat Area

25

extensions

26

extensions

27

continuous recesses

119

limiting elements

124

Area

127

backlash

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19912970 A1 [0002]
• - DE 19909044 A1 [0002, 0034]
• - DE 19648342 A1 [0002]
• - DE 19603248 A1 [0002, 0034]
• - DE 4117584 A1 [0002]
• WO 99/49234 [0008, 0034, 0035, 0050, 0054]
• DE 19728422 A1 [0034]
• DE 19522718 A1 [0034]
• DE 4117582 A1 [0034]
• - DE 4117581 A1 [0034]
• - DE 4117579 A1 [0034]
• - DE 4406826 A1 [0034]
• - DE 19834728 A1 [0036]
• DE 19834729 A1 [0036]
• DE 4124614 A1 [0043]
• DE 4128868 A1 [0043]

Cited non-patent literature

• "Automobiltechnisches Taschenbuch, Dusseldorf, VDI-Verlag, 1995 (ISBN 3-18-419122-2)", pages 215 to 221 [0014]
• - "Automobiltechnisches Taschenbuch, Dusseldorf, VDI-Verlag 1995 (ISBN 3-18-419122-2)", pages 215 to 221 [0047]

Claims (27)

Torsional vibration damper with a drive-side and a driven-side transmission element, the counter against at least one provided between these damping device at least one circumferentially effective long coil spring are rotatable with each other, wherein the transmission elements Have loading areas for the coil spring and radially within the coil spring at least one a boundary the rotation between the transmission elements effecting Stop element is provided, wherein the stop element two to ten Angle degrees before the maximum allowable compression travel the coil spring is effective. Torsional vibration damper in particular after Claim 1, characterized in that the at least one coil spring by at least some contact their turns the rotation of the transmission elements is limited, with short before touching the coils and / or touching them the turns that at least one stop element is effective. Torsional vibration damper according to claim 1 or 2, characterized in that at least two in the circumferential direction are provided extending coil springs, which each at least one stop element is assigned. Torsional vibration damper according to one of the claims 1 to 3, characterized in that at least one low relative twist angle between the transmission elements the helical compression springs and the stop elements acted upon simultaneously become. Torsional vibration damper according to claim 4, characterized in that the twist angle is of the order of magnitude from 1 ° to 6 °. Torsionsschwingungsdämpfer after at least one of the preceding claims, characterized in that at least one helical spring is designed in such a way that at least areas whose spring turns at least at the beginning of the low Relative twist angle or within the small relative twist angle to touch each other, but by sliding on each other touching winding areas another compression path of the Spring is possible. Torsional vibration damper according to claim 6, characterized in that between the two transmission elements at least one energy storage is provided, at least by two Helical compression springs, namely an outer and a received within this inner helical compression spring is formed, wherein one of these helical compression springs the other, by slipping of turns areas allowed compression travel and the other spring when going to block the turns has a fixed block length, this other spring within the possible further compression path of the a feather goes on block. Torsional vibration damper according to claim 7, characterized in that the inner spring has a fixed block length having. Torsionsschwingungsdämpfer after at least one of the preceding claims, characterized that one of the transmission elements by at least two axially spaced side walls and the other transmission element by at least one arranged between these, flange-like Component is formed, wherein the stop element radially inside a coil spring between the two side walls and rotatably connected thereto via a positive connection is. Torsional vibration damper according to claim 9, characterized in that the flange-like component radial Beaufschlagungsbereiche has that with the at least one stop element interact. Torsional vibration damper according to claim 9 or 10, characterized in that the positive connection between a stop element and the side walls over axially facing each other embossings of the side walls takes place, which engage in axial depressions of the stop element. Torsional vibration damper according to claim 11, characterized in that the circumferential Extension of the embossments and depressions at least are approximately equal. Torsional vibration damper according to claim 11, characterized in that the depressions longer are formed as the embossments. Torsional vibration damper according to one of Claims 9 to 13, characterized in that the at least a stop element is clamped axially between the two side walls. Torsional vibration damper according to one of Claims 9 to 14, characterized in that the two Sidewalls axially facing away from each other embossments have, in the axial projections of the stop element intervention. Torsional vibration damper according to claim 15, characterized in that the projections in the circumferential direction are formed the same length or shorter than the embossments the side walls. Torsional vibration damper according to one of Claims 11 to 16, characterized in that the at least a stop element - viewed in the circumferential direction - laterally protruding from the embossments introduced into the side walls Having areas of stop areas of the flange Component can be acted upon. Torsional vibration damper according to one of Claims 1 to 17, characterized in that the stop elements Have plastic stops. Torsionsschwingungsdämpfer after at least one of claims 1 to 18, characterized in that the stop elements consist at least partially of a duroplastic. Torsionsschwingungsdämpfer after at least one of claims 1 to 19, characterized in that the stop elements at least partially made of a thermoplastic. Torsionsschwingungsdämpfer after at least one of claims 1 to 20, characterized in that the stop elements at least partially made of a hard elastomer consist. Torsional vibration damper according to one of Claims 1 to 21, characterized in that the stop elements at least approximately evenly over the circumference are distributed. Torsional vibration damper according to one of Claims 1 to 22, characterized in that the stop elements Part of a friction device are. Torsional vibration damper according to one of Claims 1 to 23, characterized in that the stop elements simultaneously serve as a friction element. Torsional vibration damper according to one of Claims 1 to 24, characterized in that it is part having at least two mutually rotatable masses Flywheel is and each one of the transmission elements is at least part of one of the masses or at least one such rotatably connected. Torsional vibration damper according to one of Claims 1 to 25, characterized in that the drive-side transmission element having the two side walls and the output side transmission element has the flange-like component. Torsionsschwingungsdämpfer after at least one of the preceding claims, characterized that it has an annular chamber in which the coil springs are included, wherein the stop elements radially inside and are provided adjacent to the coil springs.