DE102019004571A1 - Centrifugal pendulum device - Google Patents

Abstract

The present invention relates to a centrifugal pendulum device (2) with a pendulum mass carrier (18), at least one pendulum mass (20) with a pendulum mass section (22) arranged to the side of the pendulum mass carrier (18) and at least one rolling element (32) which is in this way in guides (40 , 44) extends in the pendulum mass carrier (18) and pendulum mass section (22) so that the pendulum mass (20) is movable relative to the pendulum mass carrier (18). A first end face (34) of the rolling element (32) can be or is supported in a first axial direction (4) on a support part (50) which is arranged on the pendulum mass section (22) or pendulum mass carrier (18) and which is connected to the respective guide (44). is arranged axially in alignment.

Description

The present invention relates to a centrifugal pendulum device with a pendulum mass carrier, at least one pendulum mass with a pendulum mass section arranged to the side of the pendulum mass carrier and at least one rolling element which extends in guides in the pendulum mass carrier and pendulum mass section in such a way that the pendulum mass can be moved relative to the pendulum mass carrier.

Centrifugal pendulum devices are known from practice which have a pendulum mass carrier and at least one pendulum mass arranged on the pendulum mass carrier. The pendulum mass has at least one pendulum mass section arranged to the side of the pendulum mass carrier, wherein the pendulum mass can for example have pendulum mass sections arranged on opposite sides of the pendulum mass carrier. In addition, at least one roll-off element is provided, which extends on the one hand into a guide in the pendulum mass carrier and on the other hand into a guide in the pendulum mass section in order to be able to move the pendulum mass relative to the pendulum mass carrier; can be spoken.

In order to be able to safely position and hold the above-mentioned rolling element in the centrifugal pendulum device in relation to the axial directions, support devices are usually assigned to the rolling element, via which the rolling element can be supported in the axial directions on the pendulum mass carrier and / or the pendulum mass section. So describes the DE 10 2014 210 667 A1 For example, a rolling element that has two radially protruding and circumferential collars, the rolling element being supported or supported on the pendulum mass carrier and the opposing pendulum mass sections via the side flanks of the collars pointing in the axial directions. Deviating from this, the DE 10 2018 001 236 A1 a rolling element with radial depressions that run around in the circumferential direction and thus form a circumferential groove, with disc springs being inserted into these circumferential grooves, via which the rolling element can be or is supported in the axial direction on the pendulum mass carrier and / or the opposing pendulum mass sections.

Both of the solutions described above have proven themselves, but are in need of improvement insofar as their structure can be further simplified in order, for example, to simplify manufacture.

It is therefore the object of the present invention to develop a centrifugal pendulum device of the generic type in such a way that it has a particularly simple structure which, moreover, ensures simplified manufacture and assembly. Furthermore, the present invention is based on the object of creating a centrifugal pendulum device which, in spite of such a simplified structure, enables the frictional forces occurring between the components of the centrifugal pendulum device to be reduced.

This object is achieved by the features specified in claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

The centrifugal pendulum device according to the invention is intended to minimize torsional vibrations occurring within a drive train of a motor vehicle. The centrifugal pendulum device has a pendulum mass carrier which, for example, can be fastened or fastened in a rotationally fixed manner to a component arranged within the torque transmission path of a drive train of a motor vehicle. The pendulum mass carrier is preferably designed in the shape of a disk or ring disk. At least one pendulum mass is arranged on the pendulum mass carrier. In the case of two or more pendulum masses on the pendulum mass carrier, these are preferably evenly distributed in the circumferential direction on the pendulum mass carrier. The pendulum mass is preferably not arranged or to be arranged in the torque transmission path of the drive train. The individual pendulum mass has at least one pendulum mass section arranged to the side of the pendulum mass carrier. For example, the named pendulum mass section can be arranged in an axial direction next to the pendulum mass carrier or a section of the pendulum mass carrier. In addition, at least one rolling element is provided, which can be designed, for example, as a substantially cylindrical rolling element. It is preferred if at least two rolling elements are provided per pendulum mass. The rolling element extends into a guide in the pendulum mass carrier on the one hand and a guide in the pendulum mass section on the other hand such that the pendulum mass can be moved relative to the pendulum mass carrier. This is preferably a pendulum movement, that is to say a movement in which a movement in the circumferential direction is superimposed on a movement in the radial direction. Said pendulum movement is here preferably via the shape of the guide in the pendulum mass carrier on the one hand and the Guidance in the pendulum mass section, on the other hand, achieved in which the guide in the pendulum mass carrier is curved, for example, in one radial direction, while the guide in the pendulum mass section is curved in the other radial direction. While the rolling element is supported in the axial direction on the pendulum mass section or the pendulum mass carrier in the known solutions via a radial collar formed in one piece with the rolling element or a plate spring which is arranged in radial grooves within the rolling element, the axial support in the centrifugal pendulum device according to the invention takes place in a first axial direction over at least one of the two end faces of the rolling element. Thus, a first end face of the rolling element can be supported or supported in the first axial direction on a support part arranged on the pendulum mass section or pendulum mass carrier, which is arranged axially in alignment with the respective guide, preferably behind the guide in the first axial direction. The front side can also be referred to as the end side of the rolling element. Since the end face of the rolling element, which is already present for support on the pendulum mass section or pendulum mass carrier, takes place via the support part arranged thereon, a radial collar or a radial groove on the rolling element can be dispensed with, which simplifies the construction and also the manufacture of the centrifugal pendulum device. For example, a rolling element can be used which is continuously cylindrical between the end faces facing away from one another. The support part arranged on the pendulum mass section or pendulum mass carrier, on the other hand, can be designed in one piece with the pendulum mass section or pendulum mass carrier, so that there is analogous direct support on the pendulum mass section or pendulum mass carrier, or it can be formed by a separate component that is attached to the pendulum mass section or pendulum mass carrier, so that there is an indirect support on the pendulum mass section or pendulum mass carrier via the support part attached to it. The aforementioned support part can also be designed in such a way that it is not arranged axially in alignment with the entire guide, on the one hand to ensure axial support and on the other hand to save material and reduce weight.

In an advantageous embodiment of the centrifugal pendulum device according to the invention, the pendulum mass has a second pendulum mass section, which is arranged on the side of the pendulum mass carrier facing away from the pendulum mass section, the at least one rolling element extending into a guide in the second pendulum mass section. This variant is therefore a centrifugal pendulum device in which the pendulum mass carrier is arranged centrally in relation to the axial direction, while the two pendulum mass sections of the pendulum mass are arranged on the opposite sides of the pendulum mass carrier in the axial direction.

In a further advantageous embodiment of the centrifugal pendulum device according to the invention, a second end face of the rolling element can be or is supported in a second axial direction opposite to the first axial direction on a second support part arranged on the second pendulum mass section, in order to also achieve the aforementioned advantages of support in the first axial direction to implement in the support of the rolling element in the second axial direction.

In a particularly advantageous embodiment of the centrifugal pendulum device according to the invention, the pendulum mass section and the second pendulum mass section are attached to each other via a connecting device, the connecting device being considered to be part of the pendulum mass, especially since it makes up the weight of the pendulum mass together with the pendulum mass sections. Said connecting device preferably has at least one connecting strut extending through a recess in the pendulum mass carrier, it being preferred if at least two such connecting struts are provided. For example, the connecting struts can extend in the axial direction through the respective recess in the pendulum mass carrier. It has also proven to be advantageous if the connecting device or its components, such as the at least one connecting strut, does not come into contact with the pendulum mass carrier in any relative rotational position of the pendulum mass relative to the pendulum mass carrier, in particular not with the edge of the above-mentioned recess within the Pendulum mass carrier.

In a preferred embodiment of the centrifugal pendulum device according to the invention, the end face of the rolling element, i.e. the first end face and / or the second end face, and the support part assigned to the end face, i.e. the support part and / or the second support part, are shaped in such a way that the end face at most partially the support part can be supported or supported. For example, the respective end face can have a shape deviating from a plane. As an alternative or in addition, the side of the respective support part facing the end face can also have a shape deviating from a plane. It is also possible that the respective support part is dimensioned in such a way that the contact area with the end face is reduced. Regardless of the particular embodiment variant, this reduces the contact area between the rolling element or its end face and the support part, whereby the friction between the named components of the centrifugal pendulum device can be reduced. In this way, not only is wear reduced, but rather a simpler rotation of the rolling element about its rolling axis is also possible, as a result of which the centrifugal pendulum device can react more quickly to torque surges within the drive train.

In a further preferred embodiment of the centrifugal pendulum device according to the invention, the end face of the rolling element can at best be partially supported or supported on the supporting part, regardless of the relative arrangement of the rolling element and support part. Since the roll-off element can move within the guides relative to the support part and, due to the play, tilting of the roll-off axis of the roll-off element is also possible, albeit slightly, this embodiment ensures that the end face and support part are matched to one another in such a way that each Relative arrangement of the rolling element and support part to one another only partially supports the end face on the support part, so that the aforementioned advantages of such a partial support apply to all operating states of the centrifugal pendulum device. In this embodiment it is also preferred if in each relative arrangement of the rolling element and the support part to one another the support surface, that is to say the maximum possible contact surface between the end face and the support part, is of the same size. This can be achieved, for example, with an end face in the form of a spherical cap and a flat side of the support part facing the end face.

In a further advantageous embodiment of the centrifugal pendulum device according to the invention, the end face of the rolling element can be supported or supported to less than 50%, preferably less than 95%, on the support part in order to ensure particularly low friction during operation of the centrifugal pendulum device, which reduces wear and tear Functionality of the centrifugal pendulum device is improved.

In order to reduce the friction within the centrifugal pendulum device in a particularly simple manner, the respective end face, i.e. the first and / or second end face, in a further preferred embodiment of the centrifugal pendulum device according to the invention is at least partially arched in the first and / or second axial direction. As an alternative or in addition, the rolling element has a frontal projection.

In a further particularly advantageous embodiment of the centrifugal pendulum device according to the invention, the arched first and / or second end face and / or the frontal projection on the rolling element is at least partially designed in the manner of a spherical cap, a cone or a truncated cone in order to provide a rolling element that is easy to manufacture and on the other hand to bring about a low friction between the rolling element and the respective support part.

In a further particularly preferred embodiment of the pendulum device according to the invention, the rolling element has a rolling axis. A rolling axis is to be understood here as that longitudinal axis of the rolling element about which the rolling element rotates when rolling within the guides. It is preferred here if the end face, i.e. the first and / or second end face, of the rolling element protrudes the furthest in the respective axial direction in the area of the rolling axis, especially since less movement occurs in this area when the rolling element rolls within the guides, so that the friction is also reduced with an axial support over precisely this area.

As already explained at the outset, the axial support of the rolling element via its end faces enables a relatively simple construction of the rolling element, especially since circumferential radial grooves or circumferential radial projections can be dispensed with, which in other solutions contribute to the axial support of the rolling element. In order to provide a particularly simple rolling element, in a further preferred embodiment of the centrifugal pendulum device according to the invention, the rolling element has a cylindrical shape between the end faces facing away from one another. It is preferred here if the rolling element has a continuous cylindrical shape between the end faces facing away from one another. In the last-mentioned embodiment variant, the rolling element therefore preferably does not have any changes in diameter, only the end faces are possibly shaped differently from a plane.

In order to create a rolling element that is particularly well adapted to the functions within the centrifugal pendulum device, in a further advantageous embodiment of the centrifugal pendulum device according to the invention, the rolling element is formed at least in two parts from a roller for rolling and a support arranged on the roller to support the support part. In this way, the role can be manufactured specifically with regard to its function, namely the rolling within the guide, while the support can also be manufactured specifically with a view to the support function on the support part.

In a further advantageous embodiment of the centrifugal pendulum device according to the invention, which is based on the embodiment described above, the support extends at least partially along the rolling axis of the rolling element in order to achieve the previously mentioned reduced friction in the region of the rolling axis. Alternatively or in addition, the support is introduced into the role. For example, the support can be inserted or pressed into the roller, with the roller preferably having a corresponding recess for this purpose. A central, continuous recess in the area of the unwinding axis is particularly recommended. As an alternative or in addition, the support is also designed in the shape of a pin, in order to be able to easily insert it into the roller or a corresponding receptacle in the roller.

In order to make the manufacture and the structure of the rolling element particularly simple, the support of the rolling element in a further preferred embodiment of the centrifugal pendulum device according to the invention protrudes over the roll of the rolling element in at least one axial direction, preferably in both axial directions, this being particularly preferred below The aforementioned end-face projection is formed in at least one or both axial directions.

In principle, the respective support part of the centrifugal pendulum device could be arranged such that it protrudes into the respective guide in the axial direction. However, this can reduce the effective contact area between the rolling element and the guide, which can lead to high surface pressures. For this reason, the support part and / or the second support part in a further preferred embodiment of the centrifugal pendulum device according to the invention is arranged at least directly behind the guide so that the rolling element can dip relatively far into the associated guide. Alternatively, the support part and / or the second support part is spaced apart from the respective guide in order not only to allow the rolling element to dip into the respective guide, but also to allow it to penetrate through the guide to the respective support part, so that particularly safe rolling is guaranteed within the leadership. In other words, the rolling element can protrude beyond the guide here.

In a further advantageous embodiment of the centrifugal pendulum device according to the invention, the support part and / or the second support part is formed in one piece with the pendulum mass section and / or the second pendulum mass section. Alternatively, the support part and / or the second support part can be formed by a support plate fastened to the pendulum mass section and / or the second pendulum mass section in order to ensure a more targeted production with regard to the respective function of the components before they are assembled.

According to a further advantageous embodiment of the centrifugal pendulum device according to the invention, the support part, that is to say the support part and / or the second support part, is formed by a tongue or bridge. Such a tongue or bridge can be produced, for example, by simply punching and / or bending the aforementioned support plate or the pendulum mass section itself, the tongue or bridge also ensuring that the area of the guide and the rolling element continue to pass through the recesses on the side of the tongue or the bridge is visible, which simplifies the correct assembly of the centrifugal pendulum device.

In a further particularly preferred embodiment of the centrifugal pendulum device according to the invention, the aforementioned tongue or bridge for forming the support part is arranged axially offset with respect to the respective pendulum mass section or support plate, which can be achieved, for example, by a corresponding bending and / or punching of the tongue or bridge. In this way, for example, the previously mentioned spacing of the support part and / or the second support part from the respective guide can be achieved without great effort.

• 1 eine teilweise Seitenansicht einer ersten Ausführungsform einer Fliehkraftpendelvorrichtung in geschnittener Darstellung,
• 2 eine Seitenansicht einer zweiten Ausführungsvariante des Abrollelements in 1 in Alleinstellung,
• 3 eine Seitenansicht einer dritten Ausführungsvariante des Abrollelements in 1 in Alleinstellung und geschnittener Darstellung,
• 4 eine teilweise Seitenansicht einer zweiten Ausführungsform einer Fliehkraftpendelvorrichtung in geschnittener Darstellung und
• 5 eine Teilansicht in Richtung des Pfeils A in 4.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to the accompanying drawings. Show it:

• 1 a partial side view of a first embodiment of a centrifugal pendulum device in a sectional view,
• 2 a side view of a second variant of the rolling element in FIG 1 in isolation,
• 3 a side view of a third embodiment of the rolling element in 1 in isolation and cut representation,
• 4th a partial side view of a second embodiment of a centrifugal pendulum device in a sectional view and
• 5 a partial view in the direction of arrow A in 4th .

1 shows a first embodiment of a centrifugal pendulum device 2 . In the figures are the opposite axial directions 4th , 6th , the opposite radial directions 8th , 10 and the opposite Circumferential directions 12 , 14th indicated by the corresponding arrows, the centrifugal pendulum device 2 around a central axis of rotation 16 is rotatable, moving in the axial directions 4th , 6th extends. In the axial directions 4th , 6th is also referred to below from the first axial direction 4th and the second axial direction 6th spoken.

The centrifugal pendulum device has a pendulum mass carrier 18th on. The pendulum mass carrier 18th is essentially disk-shaped or plate-shaped, in the embodiment shown, annular disk-shaped, the pendulum mass carrier 18th essentially in one of the radial directions 8th , 10 spanned plane extends. In the radial direction 10 inside can the pendulum mass carrier 18th non-rotatably connected to a component (not shown) within the torque transmission path of a drive train.

On the pendulum mass carrier 18th is at least one pendulum mass 20th arranged. Albeit in 1 just a pendulum mass 20th is shown, there are preferably two or more pendulum masses 20th arranged on the pendulum mass carrier, the two or more pendulum masses 20th thereby in the circumferential direction 12 , 14th evenly distributed on the pendulum mass carrier 18th are arranged. The pendulum masses are preferably not arranged in the torque transmission path of the drive train.

The pendulum mass 20th consists of a first pendulum mass section 22nd that is in the first axial direction 4th next to the pendulum mass carrier 18th or at least a portion thereof is arranged, a second pendulum mass portion 24 that is in the second axial direction 6th next to the pendulum mass carrier 18th or a portion thereof is arranged, and a connecting device 26th together. The first pendulum mass section 22nd and the second pendulum mass section 24 are about the connecting device 26th attached to each other.

How out 1 can be seen, has the connecting device 26th at least one in the axial direction 4th , 6th through a recess 28 in the pendulum mass carrier 18th extending connecting strut 30th on, both in the first axial direction 4th as well as in the second axial direction 6th is graduated to the two pendulum mass sections 22nd , 24 to keep at a predetermined axial distance. Albeit in the 1 just a connecting strut 30th is shown, it is preferred if two or more connecting struts 30th are provided through corresponding recesses 28 in the pendulum mass carrier 18th extend. The connecting device 26th or their connecting strut 30th and the recesses 28 are designed such that the connecting device 26th the pendulum mass carrier 18th regardless of the respective position of the pendulum mass 20th relative to the pendulum mass carrier 18th not touched or at most through a softer damping part.

A pendulum motion of the pendulum mass 20th , which in contrast to the pendulum mass carrier 18th is not to be arranged in the torque transmission path of a drive train, relative to the pendulum mass carrier 18th to enable movement in the circumferential direction 12 , 14th with movement in the radial directions 8th , 10 superimposed, is at least one rolling element 32 intended. Albeit in 1 just a rolling element 32 is shown, so are preferably at least two rolling elements 32 of the type described in more detail below per pendulum mass 20th intended.

The rolling element 32 has one in the first axial direction 4th pointing first face 34 and one of the first end face 34 turned away in the second axial direction 6th pointing second face 36 on, the rolling element 32 between the faces facing away from each other 34 , 36 continuously a cylindrical shape and a constant diameter d having. A first roll-off section 38 of the rolling element 32 extends in or through a guide 40 within the pendulum mass carrier 18th . Starting from the first roll-off section 38 a second roll-off section extends 42 in the axial direction 4th in a tour 44 in the first pendulum mass section 22nd . It also extends from the first roll-off section 38 a third roll-off section 46 of the rolling element 32 in the axial direction 6th in a tour 48 in the second pendulum mass section 24 .

The mentioned tours 40 , 44 , 48 are each as a window in the pendulum mass sections 22nd , 24 or the pendulum mass carrier 18th educated. In addition, it points in the circumferential direction 12 , 14th elongated leadership 40 in a central section, a curvature or bulge in the radial direction 8th to the outside, as described in more detail below, for example 5 is indicated during the two tours 44 , 48 an opposite curvature or bulge in the radial direction 10 exhibit. You can also use bean- or kidney-shaped guides here 40 , 44 , 48 talk, taking the guides 44 , 48 have an orientation that corresponds to the orientation of the guide 40 is opposite.

The pendulum mass sections 22nd , 24 are each disc or plate-shaped, similar to the pendulum mass carrier 18th . The first roll-off section 38 , the second roll-off section 42 and the third roll-off section 46 have - as already indicated - the same diameter d on, especially the rolling element 32 a continuous cylindrical shape between the opposite end faces 34 , 36 having. It is moreover preferred here if it is also a continuous cylindrical shape, so that no gradations are provided in the cylindrical shape. In addition, the aforementioned roll-off sections are 38 , 42 , 46 integrally formed with each other. From the 1 it can also be seen that the first roll-off section 38 directly in or on the guide 40 , the second roll-off section 42 directly in or on the leadership 44 and the third roll-off section 46 directly in or on the leadership 46 can be rolled and / or supported.

The rolling element 32 is both in the first axial direction 4th at the first pendulum mass section 22nd as well as in the second axial direction 6th at the second pendulum mass section 24 supportable or supported. The mentioned support in the opposite axial directions 4th , 6th takes place over the front side 34 or. 36 of the rolling element 32 . So is the first face 34 of the rolling element 32 in the first axial direction 4th at one at the first pendulum mass section 22nd arranged first support part 50 supportable or supported, the first support part 50 in the axial direction 4th with the guide 44 in the first pendulum mass section 22nd is arranged in alignment. The same applies to the support in the second axial direction 6th . So is the second face 36 of the rolling element 32 in the first axial direction 4th opposite second axial direction 6th at one at the second pendulum mass section 24 arranged second support part 52 supportable or supported. The second support part 52 is in the axial direction 6th with the guide 48 in the second pendulum mass section 24 arranged in alignment.

The first support part 50 is from the leadership 44 in the first pendulum mass section 22nd in the axial direction 4th spaced apart, as shown on the basis of the distance a is indicated. A similar distance a is also in the axial direction 6th between the leadership 48 in the second pendulum mass section 24 and the second support part 52 intended. Through these axial clearances a it is ensured that the rolling element 32 not just in the two tours 44 , 48 can immerse, rather it can also extend beyond the pendulum mass carrier 18th remote side of the respective pendulum mass section 22nd or. 24 and thus through the aforementioned leadership 44 or. 48 extend. The support parts are analogous 50 or. 52 in the axial direction 4th or. 6th indirectly behind the respective assigned leadership 44 or. 48 arranged. Although this embodiment variant is preferred, the support part could 50 or. 52 but also in the axial direction 4th or. 6th immediately behind the respectively assigned guide 44 or. 48 be arranged.

In principle, the first and second support parts 50 , 52 integral with the first pendulum mass section 22nd or the second pendulum mass section 24 be formed by, for example, a correspondingly deformed section of the respective pendulum mass section 22nd or. 24 behind the respective leadership 44 or. 48 would be arranged. In the embodiment shown, the two support parts 50 , 52 however, formed by an initially separately formed support plate or a section thereof. Nonetheless, the following statements also apply in a corresponding manner to support parts formed in one piece with the pendulum mass sections.

So is a first gusset 54 on the pendulum mass carrier 18th facing away from the first pendulum mass section 22nd attached. The previously mentioned connecting strut also advantageously serves as a fastening here 30th . While the first gusset 54 for attachment to the first pendulum mass section 22nd right on the side of the pendulum mass section 22nd is the first support part 50 forming portion of the first support plate 54 deformed in such a way that it is opposite to the first pendulum mass section 22nd and the remaining portions of the first gusset 54 in the axial direction 4th is offset by the aforementioned distance a to create. This applies in a corresponding manner to the second support part 52 , which as a section of a second support plate 56 is formed, the second support plate 56 via the connecting strut 30th the connecting device 26th on the pendulum mass carrier 18th remote side of the second pendulum mass section 24 is attached, wherein the the second support part 52 forming portion of the second support plate 56 opposite both the second pendulum mass section 24 as well as the rest of the second gusset 56 in the axial direction 6th is offset by the aforementioned distance a towards the leadership 48 to achieve. Albeit later with reference to the 4th and 5 described in more detail, so can the support parts 50 and 52 preferably be formed by a tongue or bridge.

The first face 34 of the rolling element 32 and that of the first face 34 associated first support part 50 are shaped so that the first end face 34 at most partially, preferably less than 50%, particularly preferably less than 95%, can thus be supported or supported on the first support part. The second face is in a corresponding manner 36 of the rolling element 32 and that of the second face 36 associated second support part 52 shaped such that the second end face 36 at most partially, preferably less than 50%, particularly preferably less than 95%, on the second support part 52 is supportable or supported. Under the first face 34 an area is preferably closed understand that of a projection of the second roll-off section 42 or / and in the axial direction 4th about the leadership 44 protruding portion in the axial direction 4th corresponds to a radial plane. Similarly, under the second face 36 preferably to be understood as an area that is a projection of the third rolling section 46 or / and in the axial direction 6th about the leadership 48 protruding portion in the axial direction 6th corresponds to a radial plane.

In addition, it is preferred if the end faces assigned to one another 34 or. 36 and support parts 50 or. 52 are shaped such that the end faces 34 or. 36 regardless of the relative arrangement of the rolling element 32 and the respective support part 50 or. 52 to each other at most partially on the associated support part 50 or. 52 is supported. In particular, this also includes relative arrangements in which the in 1 indicated unwinding axis 58 during operation and due to a certain amount of play within the tours 40 , 44 , 48 tilted. The said unwinding axis 58 can also be used as the longitudinal axis of the essentially cylindrical rolling element 32 are designated.

In the first variant of the rolling element 32 according to 1 this is achieved in that both the first face 34 as well as the second face 36 in the first axial direction 4th or the second axial direction 6th is bulging. So are in the first variant after 1 the first face 34 and the second face 36 each designed in the manner of a spherical cap or a spherical segment in order to be combined with that of the respective end face 34 or. 36 facing side of the associated support part 50 or. 52 to achieve the smallest possible contact surface, which ultimately leads to a reduction in friction as well as less wear and better functionality. Here are the front sides 34 or. 36 preferably shaped in such a way that there is point contact or support.

A second variant of the rolling element 32 for use in the centrifugal pendulum device 2 after 1 is in 2 shown. Here are the first face 34 and the second face 36 designed in the manner of a cone or pointed cone in order to provide punctual support on the respectively assigned support part 50 or. 52 to effect. Alternatively, the end faces 34 , 36 however, it can also be designed in the manner of a truncated cone.

A third variant of the rolling element 32 for use in the centrifugal pendulum device 2 after 1 is in 3 shown. So shows the rolling element 32 in the variant according to 3 one in the first axial direction 4th protruding first frontal projection 60 and one in the second axial direction 6th protruding second frontal projection 62 on. The two front projections 60 , 62 can do the previously under 1 and 2 have the form described, wherein in 3 the shape of a spherical cap is shown.

Also in the third variant is after 3 the rolling element 32 two pieces from a cylindrical roll 64 to unroll and one on the roll 64 arranged support 66 for support on the two support parts 50 , 52 educated. More precisely is the support 66 designed pin-shaped and in an axial direction 4th , 6th continuous recess 68 the role 64 brought in. This recess 68 extends along the roll axis 58 the role 64 so that the prop 66 along the roll axis 58 extends. Also is off 3 can be seen that the pin-shaped support 66 in the first axial direction 4th with the formation of the first frontal projection 60 via the first end face of the roller, which is otherwise just designed 64 protrudes. The pin-shaped support is also in place 66 in the second axial direction 6th via the front face, which is otherwise just designed 36 with the formation of the second frontal projection 62 emerged. They therefore form in the axial direction 4th pointing side of the role 64 and the first end projection 60 together the first face 34 while the one in the axial direction 6th pointing side of the role 64 and the second frontal projection 62 the second face 36 of the rolling element 32 form.

All three in the 1 to 3 shown design variants of the rolling element 32 also have in common that the first face 34 in the area of the unwinding axis 58 furthest in the first axial direction 4th protrudes to provide axial support in the area of the unwinding axis 58 to effect while the second face 36 in the area of the unwinding axis 58 furthest in the second axial direction 6th protrudes to also provide axial support there in the area of the unwinding axis 58 to enable. Both are not absolutely necessary, but lead to a less pronounced relative movement in the contact area during operation of the centrifugal pendulum device, whereby the wear can be further reduced and the functionality of the centrifugal pendulum device can be further increased.

The 4th and 5 show a second embodiment of a centrifugal pendulum device 2 , which essentially the embodiment according to 1 to 3 corresponds, so that only the differences will be discussed below, the same reference numerals are used for the same or similar parts and the preceding description otherwise applies accordingly.

As already indicated above, the two support parts 50 and 52 in the second embodiment according to the 4th and 5 formed by tongues. More precisely, are the support parts 50 , 52 formed by sheet metal tongues from the first and second support plate 54 , 56 punched out and opposite the remaining sections of the support plates 54 or. 56 in the axial direction 4th or. 6th were offset by the aforementioned distance a to achieve. The width b the support tongue is preferably smaller than the diameter d of the rolling element 32 . As in 5 indicated, the two support parts 50 , 52 however, it can also be designed in the form of a bridge or sheet metal bridge which, in contrast to a sheet metal tongue, not only holds one side but rather both sides of the material with the respective support sheet 54 , 56 has what is in 5 is indicated by the dashed lines.

This second embodiment has the advantage that the rolling element 32 even after attaching the two support parts 50 , 52 is still visible, which simplifies proper assembly. In addition, the relatively small tongue or bridge allows such a small contact area with the end faces 34 , 36 of the rolling element 32 be achieved that basically also end faces 34 , 36 come into question that are flat or extend in a radial plane without the aforementioned curvature or the aforementioned frontal projections 60 , 62 exhibit. Nonetheless, it is - as in 4th shown - preferred if the tongue- or bridge-shaped support parts 50 , 52 with protruding front sides 34 , 36 or frontal projections 60 , 62 on the side of the rolling element 32 be combined.

List of reference symbols

2

Centrifugal pendulum device

4th

first axial direction

6th

second axial direction

8th

radial direction

10

radial direction

12th

Circumferential direction

14th

Circumferential direction

16

Axis of rotation

18th

Pendulum mass carrier

20th

Pendulum mass

22nd

first pendulum mass section

24

second pendulum mass section

26th

Connecting device

28

Recess

30th

Connecting strut

32

Rolling element

34

first face

36

second face

38

first roll-off section

40

guide

42

second roll-off section

44

guide

46

third roll-off section

48

guide

50

first support part

52

second support part

54

first support plate

56

second support plate

58

Unwind axis

60

first frontal protrusion

62

second frontal projection

64

role

66

support

68

Recess

a

distance

b

width

d

diameter

QUOTES INCLUDED IN THE DESCRIPTION

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Patent literature cited

• DE 102014210667 A1 [0003]
• DE 102018001236 A1 [0003]

Claims (9)

Centrifugal pendulum device (2) with a pendulum mass carrier (18), at least one pendulum mass (20) with a pendulum mass section (22) arranged to the side of the pendulum mass carrier (18) and at least one rolling element (32) which is in guides (40, 44) in the Pendulum mass carrier (18) and pendulum mass section (22) extends so that the pendulum mass (20) is movable relative to the pendulum mass carrier (18), characterized in that a first end face (34) of the rolling element (32) in a first axial direction (4) can be or is supported on a support part (50) which is arranged on the pendulum mass section (22) or pendulum mass carrier (18) and is arranged axially in alignment with the respective guide (44). Centrifugal pendulum device (2) after Claim 1 , characterized in that the pendulum mass (20) has a second pendulum mass section (24) which is arranged on the side of the pendulum mass carrier (18) facing away from the pendulum mass section (22), and the at least one rolling element (32) is in a guide (46 ) extends in the second pendulum mass section (24), a second end face (36) of the rolling element (32) in a second axial direction (6) opposite to the first axial direction (4) at a second axial direction (6) arranged on the second pendulum mass section (24) Support part (52) can be or is supported and the pendulum mass section (22) and the second pendulum mass section (24) particularly preferably via a connecting device (26), which optionally has at least one connecting strut (18) extending through a recess (28) in the pendulum mass carrier (18). 30), are attached to one another. Centrifugal pendulum device (2) according to one of the Claims 1 or 2 , characterized in that the end face (34; 36) of the rolling element (32) and the support part (50; 52) assigned to the end face (34; 36) are shaped such that the end face (34; 36), optionally independently of the Relative arrangement of rolling element (32) and support part (50; 52) to one another, at most partially, preferably less than 50%, particularly preferably less than 95%, on which support part (50; 52) can be or is supported. Centrifugal pendulum device (2) according to one of the preceding claims, characterized in that the first and / or second end face (34; 36) is at least partially arched in the first and / and second axial direction (4; 6) and / or the rolling element ( 32) has a frontal projection (60; 62), the arched first and / or second front side (34; 36) and / or the frontal projection (60; 62) preferably at least partially in the manner of a spherical cap, a cone or a Is formed truncated cone. Centrifugal pendulum device (2) according to one of the preceding claims, characterized in that the rolling element (32) has a rolling axis (58), the first and / or second end face (34; 36) preferably farthest in the area of the rolling axis (58) axial direction (4; 6) protrudes. Centrifugal pendulum device (2) according to one of the preceding claims, characterized in that the rolling element (32) between the end faces (34; 36) facing away from one another, preferably continuously, has a cylindrical shape. Centrifugal pendulum device (2) according to one of the preceding claims, characterized in that the rolling element (32) consists of at least two pieces of a roller (64) for rolling and one arranged on the roller (64) and optionally extending along the rolling axis (58) or / and in the roller (64) and / or pin-shaped, support (66) is formed for support on the support part (50; 52), the support (66) preferably in at least one axial direction (4; 6), optionally in in both axial directions (4, 6), protruding beyond the roller (64), particularly preferably with the formation of the frontal projection (60; 62). Centrifugal pendulum device (2) according to one of the preceding claims, characterized in that the support part (50) and / or the second support part (52) is arranged directly behind the guide (44; 48) or is spaced from the respective guide (44; 48) . Centrifugal pendulum device (2) according to one of the preceding claims, characterized in that the support part (50) and / or the second support part (52) in one piece with the pendulum mass section (22) and / or the second pendulum mass section (24) or from one attached to the pendulum mass section ( 22) and / or the support plate attached to the second pendulum mass section (24) is formed, the support part (50; 52) preferably being formed by a tongue or bridge, which is particularly preferred compared to the respective pendulum mass section (22; 24) or support plate (54; 56) is arranged axially offset.

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