EP3649370A1

EP3649370A1 - Guide plate for a tuned mass damper, tuned mass damper, and method for providing a tuned mass damper

Info

Publication number: EP3649370A1
Application number: EP18733578.1A
Authority: EP
Inventors: Matthias Kram; Andreas Orlamünder
Original assignee: ZF Friedrichshafen AG
Current assignee: ZF Friedrichshafen AG
Priority date: 2017-07-05
Filing date: 2018-06-21
Publication date: 2020-05-13
Also published as: DE102017211465A1; WO2019007688A1; CN110869639A; CN110869639B

Abstract

The invention relates to a guide plate (2) for a tuned mass damper (1). The guide plate (2) has a plurality of recesses (3), each serving as a raceway (4) for a rolling body (5), which movabley guides a damper mass (6) in the radial direction and in the circumferential direction of the tuned mass damper (1). The recesses (3) are arranged in the radial direction on a common diameter and each have in the circumferential direction the same spacing with respect to a directly adjacent recess (3) and the same orientation with respect to the axis of rotation of the guide plate (2).

Description

Railway sheet for a damper vibration damper,

Absorber vibration damper and

Method of providing a damper vibration damper

Embodiments relate to a track plate for a Tilgerschwingungsdämpfer, a Tilgerschwingungsdämpfer and a method for providing a Tilgerschwingungsdämpfers that can be used for example in a damper assembly in the context of a drive train of a motor vehicle, such as a motor vehicle with an internal combustion engine.

In the field of motor vehicle construction, but also in other areas of mechanical and plant engineering, damper assemblies are used, which are used for damping at least one vibration component of a rotational movement and optionally for transmitting a torque of the rotary motion.

In the case of a powertrain of a motor vehicle, corresponding deviations from a uniform or uniform rotational movement can be caused, for example, by an unfolding characteristic of the torque of an internal combustion engine. In order to decouple, but at least attenuate, these components, for example a transmission, a differential or other corresponding components of a drive train, damper arrangements are used there.

Such damper arrangements may, for example, be damper vibration dampers or the damper arrangement may comprise a damper vibration damper. Such a Tilgerschwingungsdämpfer with a plurality of absorber masses is known for example from DE 10 2009 052 978 A1. About two rolling elements, the absorber mass is guided in kidney-shaped recesses of a sheet metal. An orientation and position of the kidney-shaped recesses with respect to a rotational axis of the Tilgerschwingungsdämpfers and also their distance is different. The track plate is disposed axially within a first and a second mass body of the Tilgerschwingungsdämpfers. In other embodiments of Tilgerschwingungsdämpfern the absorber masses are guided in the axial direction within two web plates. For this purpose, two web sheets are provided. These are then aligned with each other so that matching kidney-shaped recesses in which the rolling elements are guided for the absorber masses are superimposed.

For example, there is a need to improve manufacturability of a damper vibration damper and its mounting. This need is taken into account by a track plate, a damper vibration damper and a method of providing a damper vibration damper according to the independent claims.

Embodiments relate to a track plate for a Tilgerschwingungsdämpfer. The track plate has a plurality of recesses, each serving as a rolling track for a rolling element, which leads a damper mass in the radial direction and in the circumferential direction of the Tilgerschwingungsdämpfers movable. The recesses are arranged in the radial direction on a common diameter. In the circumferential direction, the recesses each have the same distance to a directly adjacent recess. Furthermore, the recesses have the same orientation to a rotational axis of the web plate.

Embodiments relate to a Tilgerschwingungsdämpfer, which is designed to damp a vibration of a torque. For this purpose, the Tilgerschwingungsdämpfer comprises at least one absorber mass and a first and a second track plate according to one of the described embodiments. The absorber mass is movably guided via at least one rolling element on the first track plate and the second track plate in the radial direction and in the circumferential direction of the absorber vibration damper. A first recess of the first web plate lies exactly over a recess of the second web plate, so that the recesses form a rolling track for the rolling element.

In some embodiments, characterized in that the recesses for guiding the rolling elements all have the same position and orientation with respect to the rotational axis of the Tilgerschwingungsdämpfers or the sheet metal, achieved be that when two of these web plates are used in the Tilgerschwingungsdämpfer, all recesses of the first sheet metal can be brought to a precise overlap with all the recesses of the second sheet metal. As a result, there may be a plurality of positions in which the two web plates can be positioned relative to each other. Aligning the two web plates to each other can then possibly be simplified. Further, identical track plates can be installed in the absorber vibration damper. This can possibly simplify the production of the web plates, namely with the same tool or tool set.

For example, the track plate may be any component that has recesses configured to guide a damper mass. These recesses may for example have the shape of a kidney. In the axial direction, the recesses may be formed continuously or as blind holes. The recesses may have a functional radius as a rolling track, for example on a convexly shaped circumferential contour of the recess, which is arranged opposite to a concave-shaped circumferential contour of the kidney-shaped recess. Under certain circumstances, the track plate may be an annular or disc-shaped component. As a material, the track plate may comprise a steel. The track plate can be made for example as a stamped part.

The rolling element, which guides the damper mass movably in the recesses, may for example be a roller, wherein an axis of rotation of the roller or Wälzköpers is arranged parallel to a rotational axis of the web plate. Movable guiding of the absorber mass by the rolling body may allow a movement of the absorber mass in a radial direction and in a circumferential view of the sheet metal, wherein the movement is limited by a shape of the recess.

A common diameter, on which the recesses are arranged, may relate, for example, to a center of the functional radius of the recess, a radially outermost or inward point of the recess or the like. Under two directly adjacent recesses or others directly adjacent elements may be, for example, two identical recesses or elements between which no further recess or no further element is formed identically arranged. The distance that has a recess to the directly adjacent recess, for example, refer to the distance between the centers of the functional radii of the recesses, the smallest distance between the outer contour or the like.

In other words, the recesses may, for example, have an equidistant arrangement. Two recesses, which have the same orientation with respect to the axis of rotation, for example, if they are arranged on the same diameter, exactly overlap when the first recess is rotated so far around the axis of rotation until it lies over the second recess. In some embodiments, all of the recesses of the web plate that are configured to guide the rolling element for the absorber mass, have the same orientation with respect to the axis of rotation. If all the recesses have the same orientation with respect to the axis of rotation, all normals on a tangent at a radially outermost point of the functional radius of the recesses form a regular star. In other words, a connection of the centers of the functional radii of the recesses or the points of the recesses radially spaced furthest to the axis of rotation with the axis of rotation may divide the metal sheet into circular sectors of the same size.

For example, two recesses that exactly overlap may have the same shape and location. The shape and position may vary due to the production, but only so far that the tolerance allows a function as Wälzbahn for Wälzköper reliable.

The absorber masses may be any component which is designed to damp a vibration with its movement with respect to the axis of rotation. For example, the absorber mass, which can also be referred to as centrifugal weight, also have at least one or exactly two recesses, which serve as a rolling track for the rolling elements. The recesses in the absorber mass For example, they may be identical to the recesses in the track plate. Under certain circumstances, the functional radius of the absorber mass can be arranged opposite to the functional radius of the recess in the track plate. The at least one absorber mass can be arranged, for example, in the axial direction between the two web plates.

In some embodiments, the Tilgerschwingungsdämpfer on two identical track plates. In other embodiments, for example, the sheet metal sheets may differ in an outer contour, and only the shape and location of the recesses may be identical in the first and second sheet metal sheets.

In some other embodiments, the track plate has at least a first opening and a second opening, the centers of which lie on a common radius, wherein the first opening has a larger diameter than the second opening. In some embodiments, this can simplify assembly of the preassembled Tilgerschwingungsdämpfers, for example on a component that transmits a torque.

In some embodiments, the two web plates are installed in the Tilgerschwingungsdämpfer so that the center of the first opening of the first sheet metal in the circumferential direction is at the same position as the center point of the second opening of the second sheet metal sheet. In some embodiments, the smaller diameter second opening may then serve to receive a connection means, such as a rivet, screw, or the like, which secures the absorber vibration damper to another component, such as a torque transmitting member. Through the first opening with the larger diameter, the assembly can be done, for example, the connection means used and / or fixed.

The first and the second opening may, for example, be passage openings. The openings may have as a cross section a circle, but also any other shape which serves to receive the connecting means and the assembly, for example a rectangle or a polygon. Under certain circumstances a shape of the first opening may differ from the shape of the second opening. The diameter on which the openings are arranged, for example, be smaller, larger or identical to the diameter on which the recesses are arranged. In the circumferential direction, for example, between two recesses exactly one first opening or exactly a second opening may be arranged.

Additionally or alternatively, the track plate may have a plurality of first openings and second openings, wherein the centers of two directly adjacent first openings are the same distance as the centers of two directly adjacent second openings. In some embodiments, it can be achieved that each second opening, which serves to receive a connecting means, with which the track plate is attached to another component, a first opening can be associated with a larger diameter, through which an assembly is possible.

Additionally or alternatively, a sum of the first openings and second openings of a web plate may be equal to a number of the recesses for guiding the rolling elements of a web plate. Then, a first opening and a second opening may be the same distance or spaced from each other by the same angle as two recesses. Under certain circumstances, however, the number of openings or their sum and the number of recesses may also differ. In some embodiments, the distances of the openings and the recesses may also differ.

In some other embodiments, the track plate on eight recesses, which are arranged circumferentially spaced by 45 ° to each other. In some embodiments, it can thus be made possible that a total of four absorber masses, each with two rolling elements, can be guided on the web plates. Then, the track plate may also include four first openings and four second openings, each of which is alternately arranged in the circumferential direction between the recesses. In other embodiments, but also a different number of recesses may be provided. Their distance can then be from 360 ° / (number of recesses).

In some embodiments of the Tilgerschwingungsdämpfers the first track plate is disposed about the rotational axis of the Tilgerschwingungsdämpfers and / or the sheet metal plate at an angle to the second track plate arranged. The angle by which the first web plate is rotated relative to the second web plate, corresponds to a distance between the recesses or a multiple, in particular an odd multiple. In some embodiments, it can be achieved that the recesses lie one above the other.

Additionally or alternatively, the track plate may include a plurality of connection holes formed to connect the track plate to another track plate. In some embodiments, this can be achieved in that the web plates can be connected to each other. The connection holes may be, for example, through-holes which lie on a different diameter than the recesses and / or the openings, possibly on a larger one. The connection holes may, for example, have as a cross section a circle or another shape, for example a rectangle or polygon. A diameter of the communication holes may be smaller than a diameter of the second and / or first openings. A number of the communication holes may correspond to a number of the recesses, but also be smaller or larger than these. Two directly adjacent connection holes may be circumferentially spaced by the same angle as two recesses and / or first and second directly adjacent openings. The communication holes may be arranged in the circumferential direction between the recesses. Under certain circumstances, the track plate can have twice as many connection holes as are used for connection. Connecting holes, which are arranged at a position which is covered in a mounted state by a damping mass, are then for example not equipped with a connecting means, such as a rivet or a screw. Also, thereby the alignment of the web plates can be simplified in some embodiments to each other. In some embodiments, two directly adjacent connection holes are circumferentially spaced by the same angle as two recesses and / or first and second directly adjacent openings. In some embodiments, all of the directly adjacent recesses, communication holes and / or first and second openings of the web are circumferentially spaced by the same distance. For example, then the number of recesses, the connecting holes and / or the sum of the first and second openings may be the same. In some embodiments, this can be achieved in that the two web plates can be easily aligned with each other.

In some embodiments, the Tilgerschwingungsdämpfer comprises a support ring which is arranged in the axial direction between the web plates. In some embodiments, this can reduce noise when the absorber masses fall radially inward. The support ring may for example be made of a plastic and be arranged radially within the absorber masses. Furthermore, the support ring, for example, in the circumferential direction can be arranged freely movable and fixed in the axial direction and / or radial direction.

Embodiments also relate to a method for providing a torsional vibration damper. For this purpose, a first track plate and a second track plate according to one of the embodiments are provided. Then at least one absorber mass is mounted on the first track plate. The second track plate is connected to the first track plate so that a center of a first opening is above the center of a second opening. In some embodiments, this can be achieved by the Tilgerschwingungsdämpfer can be complained about the second opening on another component, wherein a tool for mounting through the first opening which is located above the second opening, is guided. A center point that lies above another center point may, for example, be arranged at the same height in the circumferential direction and in the radial direction. The other component can be a torque-transmitting component, for example a drive train, for example a torsion damper or its cover plates. Embodiments also relate to a method for providing a torsional vibration damper. For this purpose, a first track plate and a second track plate identical to the first track plate are provided. At least one absorber mass is mounted on the first track plate. The second track plate is connected to the first track plate, wherein the second track plate is rotated about an axis of rotation by 45 ° relative to the first track plate.

The embodiments disclosed in the foregoing description, the appended claims and the appended figures, as well as their individual features, may be relevant and implemented both individually and in any combination for the realization of an embodiment in its various forms.

Thus, the figures show schematically the following views:

1 is a schematic representation of a perspective view of a Tilger- vibration damper according to an embodiment with a track plate according to an embodiment;

FIG. 2 shows a schematic representation of a perspective rear view of the absorber vibration damper of FIG. 1; FIG.

3 is a schematic representation of a perspective view of the absorber vibration damper of FIG. 1, with a track sheet hidden;

4 shows a schematic representation of a sectional view of a hydromechanical transducer with the Tilgerschwingungsdämpfers according to an embodiment with a track plate according to an embodiment. and

5 is a schematic representation of a method for providing a Tilgerschwingungsdämpfers according to an embodiment. In the following description of the accompanying drawings, like reference characters designate like or similar components. Further, summary reference numbers are used for components and objects that occur multiple times in one embodiment or in one representation, but are described together in terms of one or more features. If a distinction is to be made between them, the reference symbols are supplemented with letters. Components or objects which are described by the same or by the same reference numerals may be the same, but possibly also different, in terms of individual, several or all features, for example their dimensions, unless otherwise explicitly or implicitly stated in the description.

1 and 2 show front and rear view of a Tilgerschwingungsdämpfers 1 according to an embodiment with a track plate 2 according to one embodiment. The sheet metal sheet 2 is a sheet metal in the form of a circular ring.

The track plate 2 has a plurality of kidney-shaped recesses 3, in the embodiment of the figures eight recesses 3, 3-a, 3-b, 3-c, 3-d, 3-e, 3-f and 3-g. The recesses 3 each serve as a rolling track 4 for a rolling element 5, 5-a, 5-b, 5-c, 5-d, 5-e, 5-f and 5-g for guiding at least one absorber mass 6 on the track plate 2 ,

The recesses 3 to 3-g are arranged in the radial direction r on a common diameter and have the same distance in the circumferential direction U to a directly adjacent recess. In other words, the recesses 3 and 3-a in the circumferential direction U are just as far apart from each other as the recesses 3-a and 3-b. Furthermore, all the recesses 3 to 3-g have the same orientation to a rotation axis R of the sheet metal 2. The rotation axis R can also be referred to as a transducer axis, for example. In other words, all functional radii 10, which may also be referred to as trajectories, have an extension which is symmetrical to an imaginary line passing through the axis of rotation R. The recesses 3 are in the way Essentially identical, therefore, the recess 3-d is described in the following representative. In order to guide the rolling elements 5-d, the recess 3-d has radially outward Shen lying on a convex contour, which represents a so-called functional radius 10.

In addition to the recesses 3 for guiding the rolling elements 5, the track plate 2 has even more openings. These are four first openings 11 and four second openings 12. The centers of the first openings 11 and the second openings 12 lie on a common radius. The first openings 1 1 have a larger diameter than the second openings 12. Both the first openings 1 1 as well as the second openings 12 are formed as through holes and circular. The centers of two directly adjacent first openings 1 1 and 1 1 -a have the same distance as the centers of two directly adjacent second openings 12 and 12-a. The first and second openings 12 and 11 are each arranged alternately in the circumferential direction between two directly adjacent recesses 3. In the radial direction, the first and second openings 1 1 and 12 are arranged on a smaller diameter than the recesses 3. Furthermore, the first opening 1 1 and the directly adjacent to this opening 12-a by the same angle in the circumferential direction U are spaced apart from each other the two directly adjacent recesses 3-a and 3-b.

The track plate 2 thus has exactly eight recesses 3, which are arranged spaced apart in the circumferential direction by 45 °. Furthermore, the track plate 2 four first openings 1 1, which are spaced from each other in the circumferential direction U by 90 ° and four second openings 12, which are also spaced in the circumferential direction U by 90 ° from each other. In this case, alternately a first opening 1 1 and a second opening 12 are arranged, wherein the centers are each spaced at 45 ° to each other.

Furthermore, the track plate 2 has a plurality of connecting holes 13. These are through holes, which have a smaller radius than the first and second openings 1 1 and 12. The connecting holes 13 are on a larger diameter than the first and second openings 1 1 and 12 and arranged as the recesses 3. Overall, the track plate 2 eight connection holes 13, which are each spaced at 45 ° in the circumferential direction from each other. In the circumferential direction, the connecting holes 13 are each arranged in the same position as a first opening 11 or a second opening 12, and also between two recesses 3. The connecting holes 13 serve to connect the track plate 2 to a further track plate.

In some other, not shown embodiments, the track plate may also be designed differently, for example, have a different number of recesses, connecting holes and / or first and second openings. Then directly adjacent recesses, communication holes and first and second openings may also have a different distance in the circumferential direction than 45 ° to each other. Two directly adjacent connection holes may be circumferentially spaced by the same angle as two recesses and / or first and second directly adjacent openings. In some embodiments, all of the directly adjacent recesses, connecting holes, and first and second openings of the web plate may have the same circumferential spacing.

The Tilgerschwingungsdämpfer 1, which is designed to dampen a vibration of a torque, comprises in addition to the first track plate 2, a second track plate 2-a, which is identical to the first track plate 2. The track plates 2 and 2-a are disposed axially adjacent to the common axis of rotation axis R. In this case, a first recess 3-a of the first sheet metal 2 lies exactly above a recess 3-h of the second sheet metal sheet 2-a which can be seen in FIG. The overlapping recesses 3-a and 3-h represent a rolling track for the rolling element 5-a.

In the axial direction, four absorber masses 6, 6-a, 6-b and 6-c are arranged essentially analogously between the two web plates 2 and 2-a. By way of example, the absorber mass 6-a and its arrangement will be described. About two rolling elements 5-a and 5-b, the absorber mass 6-a in the radial direction r and in the circumferential direction U of the Tilgerschwingungsdämpfers 1 is movably guided. The absorber mass 6-a has two plates 7 and 8. These are fixed to one another via the two rolling elements 5-a and 5-b, which are each guided in recesses 9-b and 9-c of the absorber mass 6-a.

The recess 9-b and analogous to the other recesses 9 in the absorber masses 6 are kidney-shaped and substantially similar to the recesses 3, but a functional radius of the recesses 9 is directed radially inward and not radially outward. Possibly, the recess in the absorber mass may be formed in other, not shown embodiments, in other ways.

The first track 2 is connected to the second track 2-a, which is identical to the first track 2. In this case, the second track 2-a is rotated about the rotation axis R by 45 ° with respect to the first track 2 or an odd integer multiple thereof, so that a first opening 1 1 of the first track plate 2 is located above a second opening 12 of the second track plate 2-a , In Fig. 1, a rivet 15 can be seen through the opening 1 1 of the first web plate 2, which is located in the opening 12 of the second web plate 2-a. This rivet 15 serves to attach the Tilgerschwingungsdämpfers 1 to other components and will be described in more detail later.

The first track plate 2 and the second track plate 2-a are connected to each other via four rivets 14-a, 14-c, 14-e and 14-g. The rivets 14-a, 14-c, 14-e and 14-g are each guided by overlapping connecting holes 13. Although 8 each 8 connecting holes 13 are provided in each sheet metal sheet 2 and 2, only four connecting holes 13, which lie in the circumferential direction outside a range of movement of the absorber masses 6, used or equipped with a rivet 14 or other connecting element. In other words, only every other connection hole 13 is used for connection. The others are provided to facilitate alignment of the web sheets 2 and 2-a with each other. 3 shows a schematic representation of a perspective view of the Tilgerschwingungsdämpfers 1 of FIG. 1, wherein the track plate 2 is hidden. As a result, a support ring 16 made of plastic can be seen, which is arranged in the axial direction between the web plates 2 and 2-a radially inside the absorber masses 6. The support ring 16 is an acoustic measure. The support ring

16 is fixed in the axial direction between the web plates 2 and 2-a, however, freely movable in the circumferential direction or not positioned by spacers, lugs or the like.

4 shows a schematic representation of a sectional view of a hydromechanical converter 17 with the absorber vibration damper 1 according to an exemplary embodiment. The preassembled Tilgerschwingungsdämpfer 1 is about its track plate 2-a with cover plates 18 of a torsional vibration damper 19 of the converter

17 connected. By not visible in Fig. 4 first opening 1 1, the rivet 15 can be introduced into the opening 12-b. Similarly, a tool can be inserted through the opening 1 1 to rivet the rivet 15.

In some other embodiments, not shown, the Tilgerschwingungsdämpfer 1 can also be arranged on another component of the converter 17, outside of the converter 17 or at another point of a drive train.

In some other embodiments, not shown, a different number of first and second openings may be provided. Important for the invention is that the recesses and the first and second openings are regularly distributed, so that two identical web plates according to the embodiments can be rotated to each other so that at least a first opening is located above a second opening, so that the pre-assembled absorber can be mounted and still cover each recess of the first sheet metal exactly one recess of the second sheet metal, so that they form a Wälzbahn for a rolling element. In other words, two directly adjacent communication holes can be circumferentially spaced by the same angle be as two recesses and / or a first and a second directly adjacent opening.

5 shows a schematic illustration of a method 20 for providing a Tilgerschwingungsdämpfers 1 according to an embodiment.

In the method 20, in a process 21, a first track plate and a second track plate, which are identical, are provided. These may, for example, be sheet metal plates according to the exemplary embodiments, the figures or other exemplary embodiments. In a further process 22, at least one absorber mass is mounted on the first track plate. The second track plate is connected to the first track plate in a process 23 such that a center of a first opening is above the midpoint of a second opening.

Additionally or alternatively, the second track plate can be connected to the first track plate in the process 23 so that the second track plate is rotated about an axis of rotation by 45 ° relative to the first track plate.

In other words, some embodiments relate to the use of a track plate for a left and right side of a Tilgerschwingungsdämpfers with the ability to obstruct 45 ° offset. The same component can be used in the left and right side absorber. In some embodiments, it may thereby be made possible that only one type of component has to be produced, for example a tool set may be sufficient for this purpose. The parts can then be installed offset by 45 °. Through-holes, small holes, large holes in the 45 ° change, can then riveted through the absorber or

be taken. Furthermore, under certain circumstances, a support ring may be provided as an acoustic measure. This can be fixed axially between the web plates, but freely movable in the circumferential direction. For example, no positioning on spacers, noses, etc. can take place.

The embodiments disclosed in the foregoing description, the following claims and the attached figures and their individual features may be important and implemented both individually and in any combination for the realization of an embodiment in its various embodiments.

In some other embodiments, features disclosed as a device feature in other embodiments may also be implemented as method features. Further, features that are implemented as method features in some embodiments may also be implemented as device features in other embodiments.

REFERENCE CHARACTERS

Tilgerschwingungsdämpfer

railway sheet

recess

rolling track

rolling elements

absorber mass

Sheet metal / absorber mass

Recess absorber mass

0 Function radius

1 1 first opening

12 second opening

13 connection holes

14 rivet

15 rivet

16 support ring

17 transducers

18 cover plate

19 torsional vibration damper

20 procedures

21 Process Deploy

22 Procedure to mount

23 Process Connect

R rotation axis

r radial direction

U circumferential direction

Claims

claims

1 . Track plate (2) for a Tilgerschwingungsdämpfer (1); wherein the track plate (2) has a plurality of recesses (3) each serving as a rolling track (4) for a rolling body (5), which movably guides a damper mass (6) in the radial direction and in the circumferential direction of the Tilgerschwingungsdämpfers (1); wherein the recesses (3) are arranged in the radial direction on a common diameter and in the circumferential direction in each case to a directly adjacent recess (3) have the same distance and the same orientation to a rotational axis of the web plate (2).

2. Railway plate according to one of the preceding claims, wherein the track plate (2) has at least a first opening (1 1) and a second opening (12) whose centers lie on a common radius, wherein the first opening (1 1) has a larger Diameter than the second opening (12).

3. A track according to claim 2, wherein the track plate (2) has a plurality of first openings (1 1) and second openings (12), wherein the centers of two directly adjacent first openings (1 1) have the same distance as the centers of two directly adjacent second openings (12).

4. A metal sheet according to one of the preceding claims, wherein the track plate (2) has eight recesses (3) which are arranged spaced apart in the circumferential direction by 45 °.

A railway panel according to any one of the preceding claims, wherein the track panel (2) comprises a plurality of connecting holes (13) adapted to connect the track panel (2) to another track panel (2-a), a number of Connecting holes (13) is equal to a number of recesses (3) and / or a sum of the first openings (1 1) and second openings (12) and / or a distance of two directly adjacent connection holes (13) in the circumferential direction is equal to a distance of two directly adjacent recesses (3) and / or a distance of a first opening (1 1) to a directly adjacent second opening (12) in the circumferential direction.

6. Tail vibration damper, which is designed to dampen a vibration of a torque, having the following features:

A first track plate (2) and a second track plate (2-a) according to any one of claims 1 to 5 arranged axially adjacent to a common axis of rotation axis; at least one absorber mass (6), which is movably guided via at least one rolling element (5) on one of the web plates (2, 2-a) in the radial direction and in the circumferential direction of the absorber vibration damper (1); wherein a first recess (3) of the first web plate (2) is located exactly above a recess (3) of the second web plate (2-a) and the recesses (3) form a rolling track (4) for the rolling element (5).

7. Tilgerschwingungsdämpfer according to claim 6, wherein the first and the second track plate (2, 2-a) are formed identically.

8. A damper vibration damper according to any one of claims 6 or 7 and 2 or 3, wherein the center of the first opening (1 1) of the first sheet metal (2) in the circumferential direction in the same position as the center point of the second opening (12) of the second sheet metal ( 2-a).

9. Tilgerschwingungsdämpfer according to one of claims 6 to 8, wherein the first track plate (2) is rotated about the rotation axis at an angle to the second track plate (2-a), wherein the angle a distance between the recesses (3) or a odd multiples thereof.

10. A damper vibration damper according to any one of claims 6 to 9, further comprising a support ring (16) which is arranged in the axial direction between the web plates (2, 2-a) to support the at least one absorber mass (6) radially inward.

11. Method (20) for providing a torsional vibration damper (1) with the following features:

Providing (21) a first sheet-metal sheet (2) and a second sheet-metal sheet (2-a) according to one of claims 1 to 5,

Mounting (22) at least one absorber mass (6) on the first track (2);

Connecting (23) the second track sheet (2-a) to the first track plate (2) such that a mid-point of a first opening (11) overlies the center of a second opening (12).