DE102008051970A1 - Torsion vibration damper for motor vehicle, has outer section provided with winding incorporating shoe and smaller extension as section of winding of springs, where winding of outer section is provided in longitudinal direction of springs - Google Patents

Abstract

The damper (1) has primary and secondary rotors (2, 3) rotatable around an axis of rotation, where the rotors are rotatably moved against effect of helical compression springs (8, 9). The springs are radially supported outwardly over a supporting shoe with a centrifugal force. The shoe consists of regions that partly encompass a radially outside section. The outer section exhibits a winding incorporating a supporting shoe and a smaller extension as a section of a winding of the springs, where the winding of the outer section is provided in a longitudinal direction of the springs.

Description

The Invention relates to torsional vibration damper, in particular for motor vehicles, with at least two about a rotation axis rotatable parts that are relatively opposite to the effect at least one coil spring are rotatable, wherein the coil spring guided in an arcuate recording is formed by areas of at least one of the two parts is, wherein the recording limited by at least one wall area is the at least radially outer regions of the Coil spring overlaps axially and at least over the length of the coil spring in the circumferential direction of the torsional vibration damper extends, wherein the coil spring radially outwardly over at least one recorded on a turn of the coil spring Abstützschuh, which led at least to the wall area is, centrifugally supportable. The support shoe has at least areas that at least one radially outer portion of the embrace the aforementioned winding at least partially.

Such torsional vibration dampers are for example by the DE 102 09 838 A1 , the DE 10 2004 006 879 A1 have been proposed, wherein in this prior art further writings are given, which also relate to at least so-called bow springs, which are claimed block and can be provided with appropriate Abstützschuhen. It is in this regard in particular to the DE 44 06 826 A1 and the DE 199 12 970 A1 directed.

Of the Present invention was based on the object, torsional vibration damper of the type described above with respect to the damping properties and in particular to optimize the service life. In particular, should by the inventive design features the coil spring and the support shoes carried by such be assured that over the life the corresponding torsional vibration damper no damage occur as a result of incorrect guidance of the springs. Furthermore, it should be ensured that the corresponding Torsional vibration damper in particularly cost-effective and easy way to manufacture and assemble.

According to the Invention, this is in a torsional vibration damper of initially described type achieved in that at least the radially outer Section of a support shoe receiving turn - in Longitudinal direction of the coil spring or in the longitudinal axis direction considered the coil spring - a smaller extension as at least the radially inner portions of the coil spring coils. By such a configuration can be ensured that go to block the radially inner sections of the Coil spring coils at least between the radially outer Section of a support shoe receiving turn and the circumferentially adjacent Windungsabschnitten a increased distance remains. Because of this enlarged Distance or free space can be guaranteed that the areas of a support shoe, which a corresponding engage trained turn and, in the longitudinal direction of the coil spring considered to intervene between turns of the coil spring, at on block the coil spring do not go damaged, in particular not be crushed. To the distance between the corresponding adjacent Winding to enlarge, it may be appropriate be, even if the one receiving a Abstützschuh Winding circumferentially adjacent turns a circumferentially Have reduced extent, which at least by a on at least one side of the coil spring forming the wire ring, the preferably a substantially circular cross-section has, attached Anformung can be generated.

Especially It may be useful if all turns radially outside a narrowed in the circumferential direction Have area or cross section.

It is therefore particularly advantageous, although at least the radially outer Sections of the one provided with a Abstützschuh Winding adjacent turns a smaller extension in the longitudinal direction the coil spring than at least the radially inner Portions of coil spring coils.

The portion of the helical spring coils, which has a smaller extent, can be produced in an advantageous manner by plastic deformation of the spring wire forming the helical spring. The deformation can be formed advantageously a hardened spring wire. The latter can be done for example by rolling. The formation or deformation of the radially outer region of the corresponding turns can take place in an advantageous manner when winding the coil spring. Such Anformung can be formed for example by a flattening. Between a supporting shoe and the winding associated therewith, a connection can advantageously be present which effects a holding of the supporting shoe relative to the helical spring at least in a direction perpendicular to the longitudinal extension of the helical spring. Advantageously, however, as already known from the prior art, the support shoe may be clipped onto the corresponding turn, that is, have a form-locking connection, which ensures a support of the Abstützschuhes on the corresponding turn in the radial direction.

The inventive design options the coil spring coils can be in particularly advantageous Find way in conjunction with a coil spring made of steel wire, which between their two Endwindungen at least two Windungsarten having different outer diameter, namely a first larger outer diameter and a second smaller outer diameter, wherein the Windungsarten - viewed in the longitudinal direction of the spring - such are wound, that the spring is diametrically opposite Windungsabschnitte having, with respect to the longitudinal direction the coil spring - viewed in the radial direction - itself in the area of the radially outer sections of the turns at least approximately at the same radial height whereas diametrically opposed, radially inner winding sections of the two winding types at least approximately around its outside diameter difference are offset.

However, the features of the invention can also be found in so-called long, pre-bent coil springs application, which have a virtually constant coil diameter and are claimed to block. In such an embodiment, it may also be advantageous if the radially inner portions of the spring coils, as for example by the DE 44 06 826 A1 has been proposed, at least on one side have a Anformung or flattening, but this Anformung is smaller than the projections according to the invention in the radially outer regions of at least individual spring coils.

Further Advantages, constructive features and functional properties of designed according to the invention torsional vibration dampers will be apparent from the following description, in which, with reference on drawings, various embodiments described are.

It demonstrate:

1 a section through a damping device in which the solutions according to the invention can be used,

2 the arrangement of a coil spring which in a damping device according to 1 Can be used

3 in the 2 illustrated arrangement of a coil spring in the compressed state,

4 a shoe and Windungsquerschnitte an inventively designed coil spring and

5 a possible embodiment of a helical spring.

The in 1 sectional torsional vibration damper forms a split flywheel 1 , which is a first or primary flywheel attachable to an output shaft, not shown, of an internal combustion engine 2 and a second or secondary flywheel 3 having. On the second flywheel 3 is a friction clutch with the interposition of a clutch disc fastened, on the one input shaft of a transmission, also not shown, is coupled and uncoupled. The momentum 2 and 3 are about a storage 4 rotatably mounted to each other, which in the illustrated embodiment radially outside of holes 5 for the implementation of fixing screws for the assembly of the first flywheel 2 is arranged on the output shaft of an internal combustion engine. Between the two momentum masses 2 and 3 is a damping device 6 effective, the energy storage 7 includes, at least one of which by helical compression springs 8th . 9 is formed. The helical compression spring 9 is at least partially in by the windings of the spring 8th taken up space formed or in other words, the two coil springs 8th and 9 are nested over each other as viewed along their length. It may be useful if the spring 9 - viewed in the circumferential direction of the torsional vibration damper - against the outer spring 8th is shorter, for example of the order of 15 to 60 angular degrees, preferably in the range of 30 to 50 degrees of angle. However, the difference length or the difference angle can also be larger or smaller.

The two momentum masses 2 and 3 have loading areas 14 . 15 respectively 16 for the energy storage 7 , In the illustrated embodiment, the loading areas 14 . 15 through in the the first flywheel 2 forming sheet metal parts 17 . 18 formed embossments formed. The axially between the loading areas 14 . 15 intended areas of application 16 are at least one with the seconds därschwungmasse 3 , for example via rivets 19 , connected flange-like loading component 20 educated. This component 20 serves as a torque transmitting element between the energy storage 7 and the flywheel 3 , The admission areas 16 are through at the outer periphery of the flange-like urging means 20 provided radial arms or arms 16 educated. The component produced by cold working sheet metal 17 serves to attach the first flywheel se 2 or the entire split flywheel 1 on the output shaft of an internal combustion engine. Radial outside is the component 17 with the likewise made of sheet metal component 18 connected. The two components 17 and 18 form an annular space 21 , here a toroidal area 22 forms. The annular space 21 or the toroidal area 22 may be at least partially filled with a viscous medium such as fat. Viewed in the circumferential direction between the projections or the loading areas 14 . 15 form the components 17 . 18 bulges 23 . 24 that the toroidal area 22 limit and record for the energy storage 7 form. At least when rotating device 1 at least the turns of the springs are based 8th to the toroidal area 22 radially outside bounding areas of the component 17 and or 18 from. At the in 1 illustrated embodiment is formed by at least one hardened sheet metal liner or sheet metal insert wear protection 25 provided on which at least the springs 8th support radially. The wear protection 25 extends in the circumferential direction advantageously at least over the entire length or angular extent of the relaxed energy storage 7 , Due to the centrifugal force support of the turns of at least the springs 8th is a speed-dependent friction damping at a change in length or compression of the energy storage between these turns and the frictionally engaged with these components 7 or the coil springs 8th generated.

Radial inside carries the radially extending component 17 an intermediate part or a hub 26 , the or the inner bearing ring of the ball bearing 4 takes up or carries. The outer bearing ring of the ball bearing 4 carries the flywheel 3 ,

Due to the aforementioned, between the individual turns of the elongated spring 8th and wear protection 25 occurring friction is especially at high engine speeds only a small or insufficient relaxation of the energy storage 7 or the helical compression springs 8th and or 9 occur, whereby the damping properties of the torsional vibration are reduced. In particular, the occurrence of load changes (train / thrust) during operation of a motor vehicle disturbing noises may arise because of the energy storage 7 then acts as a relatively hard stop, because the spring coils of the energy storage 7 remain in an at least partially strained state due to the aforementioned friction and thus produce a high spring stiffness.

To avoid this, or at least a much greater relaxation of the energy storage or at least the coil spring 8th To ensure even at higher engine speeds, come out, among other things 2 Obvious, Abstützschuhe, here by sliding shoes 30 are formed, for use, each on a radially outer portion 31 a turn 32 the helical compression spring 8th are plugged. The sliding shoes 30 be by during rotation of the torsional vibration damper 1 on the coil spring 8th (and optionally 9 , according to 1 ) acting centrifugal force radially outwards and are based on the coil spring 8th at least radially outer wall surrounding 33 from. At the in 2 illustrated embodiment, the sliding blocks are based 30 directly on the wall 33 from. Advantageously, however, between the wall 33 and the sliding shoes 30 an intermediate layer or intermediate layer may be provided, which preferably has a high wear resistance and / or good sliding properties, to the torsional resistance between the sliding shoes 30 and to further minimize this supporting surface. To reduce this torsional resistance, as related to 1 described, lubrication be provided. Furthermore, it can be particularly advantageous if, to improve the structure of a lubricating film, at least one of the areas in frictional contact has at least one fine surface structuring, which also includes the retention of lubricant, in particular fat, between the friction shoes 30 and the supporting surface 34 favored. The latter can be achieved, for example, by providing a certain unevenness or roughness on at least one of the interacting sliding or supporting surfaces. In an advantageous manner, at least one of the interacting sliding or supporting surfaces may also have a coating, as is the case, for example, with sliding bearings. Such sliding surfaces may include, for example, PTFE, graphite and / or copper or bronze.

Advantageously, the sliding shoes 30 made of plastic, whereby they can be produced in a simple manner, namely by spraying.

As in particular in connection with 4 it can be seen have the sliding shoes 30 areas 35 . 36 , which protrude radially inwards and here by nose or hook-shaped areas 35 . 36 are formed. The noses 35 . 36 each encompass the radially outer portion 31 a coil spring winding 32 , The thus formed positive connection between the sliding shoes 30 and the associated turns 32 ensures at least one positioning or setting movement of the sliding shoes 30 in the longitudinal direction of the spring 8th ,

Due to the special design of the areas or noses 35 . 36 will continue, a preferably positive connection between the shoes 30 and the associated spring coils 32 also guaranteed in the radial direction. The thus formed holder of the sliding shoes 30 on the assigned turns 32 a one direction perpendicular to the longitudinal axis 37 the feather 9 ( 2 ) allows advantageously a pre-assembly of the sliding shoes 30 on the appropriate spring 8th , This will cause the assembly of a torsional vibration damper 1 considerably simplified. Advantageously, those with sliding shoes 30 provided coil springs 8th designed curved, whereby their assembly is facilitated.

The in conjunction with the invention designed sliding shoes 30 used for use coil springs 8th are, as already mentioned, preferably elongate, so they have a large spring length / Windungsaußendurchmesser ratio, which may be on the order of between 5 and 20.

The design and arrangement of the springs 8th is preferably such that these relative rotation between the input part and output part of the torsional vibration damper 1 , which here by the two momentum masses 2 . 3 are limited. For this purpose, the coil springs 8th preferably claimed in such a block, that the radially inner winding sections 38 go to block, so touch directly, as in 3 is shown. It must also be ensured that in the region of the radially outer portions of the spring coils of a coil spring 8th there is sufficient clearance in the circumferential direction to crush or damage the retaining areas 35 . 36 the sliding shoes 30 to avoid. The latter is by appropriate selection of a spring 8th forming spring wire, the winding diameter, the pitch of at least individual turns and the radius of curvature on which the spring is provided realizes. It is expedient if at least the one shoe 30 receiving turns 32 have a different shape than those between these turns 32 provided turns.

At the in 4 illustrated embodiment has preferably made of spring steel wire to form the turns 32 and of these circumferentially adjacent turns 32a and 32b an initially at least substantially circular cross-section. The radially outer section 31 the turn 32 has at least in the area to which the holding areas 35 . 36 one is here clipped by a flattening 42 . 43 formed molding. The formations 42 . 43 ensure that the one shoe 30 receiving section 31 in the circumferential direction of the torsional vibration damper or in the direction of the longitudinal axis 37 a spring 9 ( 2 ), has a smaller extension than the remaining areas of a turn 32 , in particular as the radially inner regions of such a turn 32 , These remaining areas of a turn 32 preferably have the output cross-section of a coil spring 9 forming spring wire.

At the in 4 illustrated embodiment also have the section 31 circumferentially adjacent sections 31a and 31b the turns 32a . 32b a flattening 44 . 45 that the flattenings 42 . 43 of the section 31 are facing. The remaining sections of the turns 32a and 32b may in turn have the original cross section of the coil spring forming a spring wire. In modification of the 4 illustrated embodiment, the sections 31a and 31b be formed similar to the section 31 , So circumferentially on both sides have a flattening. If this is expedient, all provided between the end turns of a corresponding coil spring turns radially outer portions such as 31 . 31a or 31b possess, which at least on a circumferential side have a deformation such as in particular flattening.

Out 4 It can be seen that the attachment of the flats or formations 42 . 43 . 44 . 45 the circumferential distance between the turns 32 . 32a and 32b or the sections 31 . 31a and 31b this turns is increased. By such a configuration can be ensured that go to block the radially inner portions of a curved coil spring forming turns damage, in particular a crushing of the holding areas 35 . 36 is avoided.

The here by flattening 42 . 43 . 44 . 45 Formations formed in a particularly advantageous manner when winding a coil spring 9 be generated. This allows a perfect alignment of these projections on the finished wound spring. It is useful if the corresponding projections 42 . 43 . 44 . 45 in a single operation, which is immediately upstream of the winding process, are produced. For this purpose, appropriate forming rollers or forming rollers can be used. Advantageously, the formations 42 . 43 . 44 . 45 at the already finished treated, so the spring properties already having wire are rolled. However, these formations could also be produced in other ways be put, z. B. by grinding.

Provided only certain turns, the z. B. for receiving a support shoe are thought, or such a winding adjacent in the circumferential direction are provided with appropriate formations, it may be appropriate be when winding the spring for receiving a Abstützschuhs certain spring coil is marked, for example, with color. This facilitates the assembly of the corresponding Abstützschuhe like sliding shoes in particular.

The areas 35 . 36 are shaped so that they are sections 40 . 41 form the corresponding turn 32 engage behind. The areas 35 . 36 are designed such that they have a certain elasticity or suspension, so that the sliding shoes 30 on the corresponding assigned turn 32 can be clipped. So it's between a shoe 30 and the associated turn 32 a snap connection exists, which is a captive holder of the shoes 30 on the associated spring 8th guaranteed.

Like from the 4 it can be seen possesses a sliding shoe 30 on both sides of a spring coil 32 receiving or supporting area 42 a in the longitudinal direction of the spring 8th extending approach or lead 49 , which advantageously engages around the spring coils by a certain angle. The approaches 49 are formed in the illustrated embodiment in cross-section such that they move with increasing distance from the area 42 rejuvenate. In the illustrated embodiment, the lugs or projections 49 formed wedge-like in cross section. Due to the special design of the approaches or projections 49 ensures that even at higher speeds the turns 32 adjacent turns not on the sliding shoes 30 come to rest, allowing a friction of these turns on the sliding shoes during the compression and relaxation of the springs 8th can be practically avoided.

In the 5 illustrated coil spring 130 for use in a torsional vibration damper, for example according to the 1 and 2 , has a variety of Windun conditions 132 extending between the two end turns 146 . 147 along the spring axis 148 or extend over the length of the spring. The turns 132 include two types of turns 149 . 150 of which in the illustrated embodiment each differs from its preceding and subsequent ones by a different outer diameter. The turns 149 have a larger outer diameter and turns 150 a smaller outer diameter. The final turns 146 . 147 preferably also have the larger outer diameter.

Although at the in 5 illustrated coil spring 130 the turns 149 . 150 extending over the entire length periodically consecutive, it may be appropriate for some applications, if such an arrangement of the turns 149 . 150 only over a partial area of the total extension of a spring 130 is available. For example, different turns can occur 149 . 150 only over at least one end region of a spring 130 extend, and it may be advantageous if such turns 149 . 150 extend over both end regions. The end regions can have the same length or the same angular extent, or else be dimensioned differently. For some applications, it may also be appropriate if such turns 149 . 150 in an intermediate region or in a middle region of the spring 130 be provided.

The aforementioned spring areas or Federend- and / or spring intermediate areas can take into account the desired Effect and the case of application are arbitrarily dimensioned.

Due to the curved shape have the turns 149 . 150 the feather 130 radially inside a smaller distance than the distance between these turns radially outward. This will ensure that between turns 149 . 150 a small distance 151 remains.

The turns 149 . 150 are related to the theoretical center or longitudinal axis 148 the coil spring 130 wound so that they are radially offset from each other, in the illustrated embodiment by the difference of the two coil diameters. The offset of the turns 149 opposite the turns 150 is in the spring embodiment according to 5 made such that, based on the center of curvature of the spring 130 the radially outer winding sections 149a . 150a These turns are at least at the same height or at the same radial distance from the center of curvature. So that means the turns 150 to the full difference between the two diameters of the turns 149 . 150 opposite the turns 149 are radially offset. So these are the theoretical centers of the ring-like turns 149 and the ring-like windings 150 also offset by this difference between the winding diameters. Due to this fact, the radially inner winding sections 150b . 149b also offset by the difference of the winding diameter to each other.

A designed according to the invention, in particular pre-curved spring 130 makes it possible to reduce or dampen the overload moments (impact moments) which occur in the drive train of a motor vehicle having an internal combustion engine to an acceptable level. This is achieved by a targeted generation of friction between the turns 149 . 150 or by a controlled deformation between these turns 149 . 150 guaranteed. This effect is in the DE 199 12 970 A1 described in more detail.

By targeted sliding of the turns 149 . 150 So is a deformation of the spring 130 generates a friction or friction hysteresis. This additional friction can be achieved by appropriate selection of the turns and the difference between the wire diameters of the turns 149 . 150 be dimensioned accordingly.

At the in 5 have shown coil spring at least all between the Endwindungen 146 and 147 provided turns 132 - longitudinal 148 the feather 130 considered - on both sides a Anformung 142 . 143 which are formed by flattening. These flats are at least in the radially outer regions 159a . 150a the turns 149 . 150 intended. By such flattening 142 . 143 becomes the between the radially outer areas 149a . 150a the turns 149 . 150 existing, circumferential distance 151 enlarged so that even when going on block the spring 130 can be guaranteed that, as related to 4 was described, which is a turn 132 encompassing areas of a support shoe will not be damaged.

The for radial support and guidance of a spring 32 respectively. 132 can be used as in connection with 4 may be formed by so-called sliding shoes, but it can also be used so-called roller skates, as for example by the DE 102 41 879 A1 were proposed.

Also can, as in the aforementioned font also discloses sliding shoes and roller skates are installed together.

The embodiments and modes of operation of the invention can be used in a particularly advantageous manner in conjunction with so-called dual-mass flywheels, as for example by the DE-OS 4 117 582 . DE-OS 4,214,655 . DE-OS 4 414 584 . DE-OS 4,420,927 and DE-OS 19522718 have become known. In principle, however, the invention can also be used with any torsional vibration damper having coil springs, such as clutch plates, torque converter dampers or pulley dampers.

In connection with the invention, energy stores which have at least one helical spring can be used in an advantageous manner, as can be seen, for example, by the DE-OS 4 229 416 . DE-OS 4 406 826 . DE-OS 19603248 . DE-OS 19648342 . DE-OS 19909044 and the DE-OS 19912970 have been proposed, wherein the radial outer portions, at least one of the support shoe receiving turns, are formed according to the invention, so have a smaller circumferential extent than the remaining portions of these turns.

1

flywheel

2

Primary flywheel

3

Secondary flywheel mass

4

storage

5

drilling

6

attenuator

7

energy storage

8th

Helical compression spring

9

Helical compression spring

14

impingement

15

impingement

16

axial impingement

17

sheet metal part

18

sheet metal part

19

rivet

20

Beaufschlagungsbauteil

21

annular room

22

Torusartiger Area

23

bulge

24

bulge

25

wear protection

26

hub

30

skids

31

Radially outer section

31a

section the turn

31b

section the turn

32

Schraubenfederwindung

32a

section the turn

32b

section the turn

33

wall

34

supporting area

35

Area

36

Area

37

longitudinal axis

38

turn sections

39

40

Abschnit

41

section

42

flattening

43

flattening

44

flattening

45

flattening

46

47

48

49

approaches

130

coil spring

131

132

convolution

142

conformation

143

conformation

146

end turn

147

end turn

148

longitudinal direction

149

convolution

149a

turn section

150

convolution

150a

turn section

151

Excessive scope distance

159a

Radially outer Area

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 10209838 A1 [0002]
• DE 102004006879 A1 [0002]
• - DE 4406826 A1 [0002, 0009]
• - DE 19912970 A1 [0002, 0039]
• - DE 10241879 A1 [0042]
• - DE 4117582 A [0044]
• - DE 4214655 A [0044]
• - DE 4414584 A [0044]
• - DE 4420927 A [0044]
• DE 19522718A [0044]
• - DE 4229416A [0045]
• - DE 4406826 A [0045]
• - DE 19603248 A [0045]
• - DE 19648342 A [0045]
• - DE 19909044A [0045]
• - DE 19912970 A [0045]

Claims (11)

Torsional vibration damper, in particular for motor vehicles with at least two rotatable about a rotation axis parts which are rotatable relative to each other against the action of at least one coil spring, wherein the coil spring is guided in an arcuate receptacle formed by areas of at least one of the two parts, further Recording is limited by at least one wall portion axially overlaps at least radially outer portions of the coil spring and extends at least over the length of the coil spring in the circumferential direction of the torsional vibration damper, wherein the coil spring radially outwardly via at least one recorded on a turn of the coil spring support shoe, the guided at least on the wall region, centrifugally supportable, the support shoe has at least regions which at least partially surround at least a radially outer portion of the aforementioned winding , characterized in that at least the radially outer portion of a support shoe receiving turn - viewed in the longitudinal direction of the coil spring - has a smaller extent than at least the radially inner portions of the turns of the coil spring. Torsional vibration damper according to claim 1, characterized characterized in that also the radially outer sections the adjacent a support shoe receiving turn Turns a smaller extension in the longitudinal direction of the Have coil spring as at least the radially inner portions the turns of the coil spring. Torsional vibration damper according to claim 1 or 2, characterized in that all turns of the coil spring a radially outer portion with a smaller one Extension in the longitudinal direction of the coil spring as the rest Have areas of these turns. Torsional vibration damper according to one of the claims 1 to 3, characterized in that the portion with lesser Extension by plastic deformation of the coil spring forming spring wire is formed. Torsional vibration damper according to claim 4, characterized characterized in that the deformation is a hardened spring wire is molded. Torsional vibration damper according to one of the claims 1 to 5, characterized in that the deformation is rolled. Torsional vibration damper according to one of the claims 1 to 6, characterized in that the at least one deformation the radially outer region of at least one turn is formed during winding of the coil spring. Torsional vibration damper according to one of the claims 1 to 7, characterized in that the helical spring forming Spring wire substantially a circular cross-section and to form at least a reduced extension at least one turn of the radially outer portion this turn - viewed in the longitudinal direction of the spring - laterally has an Anformung at least on one side. Torsional vibration damper according to claim 8, characterized characterized in that the Anformung formed by a flattening is. Torsional vibration damper according to one of the claims 1 to 9, characterized in that between the support shoe and the associated winding there is a connection, the a holder of the Abstützschuhs against the coil spring in a direction perpendicular to the longitudinal extent of the coil spring causes. Torsional vibration damper according to one of the claims 1 to 10, characterized in that the coil spring made of steel spring wire is made and between their two end turns at least two winding types with different outside diameters has, namely, a first, larger Outer diameter and a second, smaller diameter, these types of turns - in the longitudinal direction of the Spring considered - are wrapped so that the spring has diametrically opposite turns sections, in relation to the longitudinal direction of the coil spring in considered in the radial direction, in the region of the radially outer Sections of the turns at least approximately the same radial height, whereas the diametrically opposite radially inner winding sections of the two winding types at least approximately around its outside diameter difference are offset.