CN112539246A

CN112539246A - Centrifugal pendulum device

Info

Publication number: CN112539246A
Application number: CN202010848291.5A
Authority: CN
Inventors: Y·K·林; J·博林
Original assignee: BorgWarner Inc
Current assignee: BorgWarner Inc
Priority date: 2019-09-21
Filing date: 2020-08-21
Publication date: 2021-03-23
Also published as: DE102019006650A1

Abstract

The invention relates to a centrifugal pendulum device (2) comprising a rotatable pendulum carrier (18) and at least one pendulum (20) arranged thereon, the pendulum being movable between two end positions relative to the pendulum carrier (18) by means of at least one guide (46, 48) extending in a guide (50, 52; 50', 52') in the pendulum carrier (18) and the pendulum (20), wherein a damping element (54) is arranged on the pendulum carrier (18), via which the pendulum (20) can be supported or supported on the pendulum carrier (18) in a first support position before reaching at least one end position or both end positions, and the pendulum (20) can be moved from the first support position to a second support position against a restoring force caused by an elastic deformation of the damping element (54). The curve of the characteristic curve of the restoring force acting on the restoring force of the pendulum (20) between the first support position and the second support position deviates from a linear curve.

Description

Centrifugal pendulum device

Technical Field

The invention relates to a centrifugal pendulum device comprising a rotatable pendulum carrier and at least one pendulum arranged thereon, the pendulum being movable relative to the pendulum carrier between two end positions by means of at least one guide extending in a guide in the pendulum carrier and the pendulum, wherein a damping element is arranged on the pendulum carrier, via which the pendulum can be supported or supported on the pendulum carrier in a first support position before reaching at least one end position or both end positions, and the pendulum can be moved from the first support position to a second support position against a restoring force caused by elastic deformation of the damping element.

Background

Centrifugal pendulum devices are known from practice, which have a rotatable pendulum carrier and at least one pendulum arranged thereon. The pendulum is movable between two end positions relative to the pendulum carrier by at least one guide extending between the pendulum carrier and a guide in the pendulum. In addition, at least one elastically deformable damping element is arranged on the pendulum carrier, via which the pendulum can be supported or supported in a certain supporting position on the pendulum carrier before reaching at least one or both end positions, in order to prevent the pendulum from slamming against the pendulum carrier when reaching the end positions. The known damping elements generally adopt an elastically deformable configuration in this regard, so that the pendulum can be moved further from the first support position into the second support position against a restoring force caused by the elastic deformation of the damping element. The interaction of the known damping elements with the oscillating weight deforms them such that the characteristic line of the restoring force acting on the restoring force of the oscillating weight has a linear course between the first and the second support position. However, it has been found that the potential of the known centrifugal pendulum devices for influencing torsional oscillations is not fully exploited.

Disclosure of Invention

In view of the above, it is an object of the present invention to provide a centrifugal pendulum device of the generic type which both ensures the known low-noise and low-loss operation and is more suitable for preventing torsional vibrations in a drive train or similar system.

The solution of the invention to achieve the above object is characterized by what is presented in claim 1. Preferred embodiments of the invention are subject matter of the dependent claims.

The centrifugal pendulum device according to the invention has a rotatable pendulum carrier. The pendulum carrier may be attached or attachable to a component arranged in the torque transmission path of the drive train, for example, indirectly or directly anti-rotationally. In addition, the centrifugal pendulum device also has at least one pendulum mass arranged on a pendulum mass carrier. In this case, preferably at least two or more pendulums are arranged on the pendulum carrier, in which case the two or more pendulums are particularly preferably distributed uniformly in the circumferential direction on the pendulum carrier. The individual pendulum can be moved between two end positions relative to the pendulum carrier, wherein the movement is preferably performed relative to the pendulum carrier in the circumferential direction and in the radial direction of the centrifugal force pendulum device. For this purpose, at least one guide, for example a roller or a slide, is provided, which extends both in a guide in the pendulum carrier and in a guide in the pendulum. The two guides are preferably designed as elongated guides. Further preferably, two guides are provided for each pendulum, which have a respective associated guide. In addition, a damping element associated with the respective pendulum is arranged on the pendulum carrier. Before reaching at least one end position, preferably both end positions, the pendulum can be supported or supported on the pendulum carrier via the damping element, in order not only to ensure low-noise operation, but also to prevent damage to the pendulum or the pendulum carrier. Before reaching the end position, the pendulum can be supported first in a first support position via the damping element or on the pendulum carrier. Due to the elasticity of the damping element, the pendulum can also be moved, counter to the restoring force caused by the elastic deformation of the damping element, via the first support position into a second support position, in which the damping element is deformed more strongly, but it is nevertheless ensured that the pendulum can be supported or supported on the pendulum carrier via the damping element. In contrast to known damping elements, the damping element of the centrifugal pendulum device according to the invention interacts with the pendulum mass and/or the pendulum mass carrier in such a way that the curve of the restoring force characteristic of the restoring force acting on the pendulum mass between the first support position and the second support position deviates from a linear curve. It is preferred here that the deviation of the course of the restoring force characteristic from the linear course is mainly or even only due to the special shape of the damping element and/or of the pendulum or/and of the pendulum carrier, while the damping element itself is uniformly made of the same material. In this way, the restoring force characteristic line can be influenced in a particularly simple manner by shaping the portion, without having to provide complex damping elements made of different elastic materials.

In a preferred embodiment of the centrifugal force pendulum device according to the invention, the restoring force acting on the pendulum increases at least once in an over-proportional manner in the direction from the first support position to the second support position, in order to have a relatively small influence on the pendulum swinging movement relative to the pendulum carrier over a relatively large range, while at the end of the pendulum swinging movement in the second support position the pendulum is braked or reset relatively strongly. This proves to be particularly effective against corresponding torsional vibrations.

According to a further preferred embodiment of the centrifugal force pendulum device according to the invention, the restoring force characteristic line has at least one discontinuity, which can be realized, for example, by a shaping on the side of the damping element, wherein first a first section of the damping element is elastically deformed and then a further section of the damping element is elastically deformed, in such a way that, for example, a plurality of sections of the damping element can be elastically deformed in steps in order to generate one or more discontinuities in the restoring force characteristic line.

In a particularly preferred embodiment of the centrifugal pendulum device according to the invention, the damping element has a support side facing the pendulum or pendulum carrier on which the pendulum or pendulum carrier can be supported or supported. The support side is provided with at least one resiliently compressible projection. It is preferred here that at least two, three or more elastically compressible projections are provided on each support side. Since the projections can be produced relatively simply on the damping element, the restoring force characteristic can also be influenced in a particularly simple and targeted manner. When the pendulum is in the first supporting position, the at least one compressible projection is first supported on the pendulum or on the pendulum carrier. If the pendulum is moved from the first support position to the second support position, the at least one compressible projection is elastically compressed before the other regions of the damping element are also elastically deformed, so that the restoring force increases in the direction from the first support position to the second support position and the course of the restoring force characteristic curve deviates correspondingly from a linear course. As mentioned above, the at least one elastically compressible projection can be arranged both on a support side which can be supported or supported on the pendulum and on a support side which can be supported or supported on the pendulum carrier. In addition, an embodiment variant is also conceivable or even advantageous in which at least one elastically compressible projection is provided both on the support side facing the pendulum and on the support side facing the pendulum carrier.

In a further particularly preferred embodiment of the centrifugal force pendulum device according to the invention, the at least one elastically compressible projection is configured to taper in the direction of the pendulum or pendulum carrier, depending on which support side the at least one elastically compressible projection is arranged. This has the advantage that, starting from the first support position of the pendulum, such a compressible projection is first of all elastically deformed or stressed over a relatively small area and over a larger area in the direction of the second support position, so that the restoring force is continuous or discontinuous depending on the configuration of the projection, while the elastically compressible projection is compressed.

In an advantageous embodiment of the centrifugal pendulum device according to the invention, as described above, two, three or more elevations are provided on the above-mentioned support side, preferably the shape of the damping element on the one hand and the shape of the pendulum mass or pendulum mass carrier on the other hand are selected such that they are simultaneously stressed in the first support position of the pendulum mass.

In a further advantageous embodiment of the centrifugal force pendulum device according to the invention, the elastically compressible projection is designed as an elongated projection in order to be able to be supported firmly on the pendulum or on the pendulum carrier. In this case, the elongated projection preferably extends in the axial direction of the centrifugal force pendulum device. The elongated projections are also particularly preferably arranged such that they follow one another in the circumferential direction of the centrifugal force pendulum device.

In a particularly advantageous embodiment of the centrifugal pendulum device according to the invention, at least one compressible cavity is formed in the damping element, which cavity is delimited on one side by a wall section, on which the damping element can be supported on the pendulum mass, and on the other side by a wall section, on which the damping element can be supported on the pendulum mass carrier, in order to deviate the course of the restoring force characteristic curve of the restoring force acting on the pendulum mass from a linear course. Thus, in this embodiment, the cavities may be compressed first, so that only a relatively small restoring force is generated, which increases once at least one cavity is fully compressed. In this embodiment, it is preferred that the wall sections (i.e. the wall section which can be supported on the pendulum on one side and the pendulum carrier on the other side) can be supported on one another and particularly preferably can be elastically deformed in the further course by the compression cavity.

As already mentioned, in the case of a centrifugal pendulum device, it is preferred if the course of the restoring force characteristic deviates from a linear course essentially or exclusively by shaping the damping element and/or the pendulum mass or/and the pendulum mass carrier, i.e. for example by the above-mentioned elevations. In a further particularly preferred embodiment of the centrifugal force pendulum device according to the invention, the damping element is therefore produced uniformly from the same material, preferably from an elastomer, in order to provide a particularly simple damping element whose curvature can deviate from a linear curvature solely on the basis of its shape or on the basis of the shape of adjacent components (such as pendulum and/or pendulum carrier). In any case, the construction of the centrifugal force pendulum device and its production are significantly simplified.

In a further preferred embodiment of the centrifugal force pendulum device according to the invention, the damping element is of one-piece construction, in order to simplify the construction and the production or assembly.

In a further preferred embodiment of the centrifugal pendulum device according to the invention, the damping element is arranged in a recess in the pendulum carrier, in order to be able to achieve a compact design and to be able to position the damping element on the pendulum carrier in a simple manner. The recess can be, for example, an edge-side cutout or a window-like opening in the pendulum carrier, which is preferably of disc-or plate-shaped, particularly preferably annular-disc-shaped configuration. But here preferably window-like openings are used as recesses. The damping element may simply enter into the recess before it can be supported in the first axial direction or on the first support part attached to the pendulum carrier. Thus, the pendulum carrier and the first support part are initially constructed separately from one another. Thus, the manufacture and assembly is particularly simple, mainly because the damping element can be simply inserted (preferably without deformation) into the notch of the pendulum carrier, so that subsequently the first support part is attached to the pendulum carrier on which the damping element can then be supported or supported in the first axial direction.

In principle, the damping element can be supported or supported in a second axial direction, which is opposite to the first axial direction, on a component which is configured as a section of the pendulum carrier and is arranged flush with the recess in the pendulum carrier in the second axial direction. However, in terms of production, it has proven to be advantageous if the damping element can be supported in a second axial direction, which is opposite to the first axial direction, or on a second support part attached to the pendulum carrier. Therefore, it is preferred in this embodiment that the second support member (just like the first support member described above) is initially configured separately from the pendulum carrier, so that it is subsequently attached to the pendulum carrier in the second axial direction by the introduction of the damping element into the notch.

In a further preferred embodiment of the centrifugal pendulum device according to the invention, the damping element can be supported or supported in the first axial direction only indirectly via the first support part on the pendulum carrier. A clear functional separation or functional division is thus achieved in that the damping element is supported in the first axial direction only indirectly via the first support element on the pendulum carrier, and not directly on the pendulum carrier. In this way, the two components can be designed particularly precisely according to their intended function. It is therefore further preferred in this embodiment that the damping element is also supportable or supported on the pendulum carrier in the second axial direction only indirectly via the second support part, so that in this case the damping element is also not supported directly on the pendulum carrier in the second axial direction and an advantageous functional separation is achieved.

In a further advantageous embodiment of the centrifugal force pendulum device according to the invention, the damping element has a retaining section which projects in the radial direction and can be supported or supported on the first support part in the first axial direction. In this way, a section of the damping element can be formed which is specifically designed for bearing on the first support part in the first axial direction. In this embodiment, too, it is preferred that the retaining section projecting in the radial direction can be supported or supported on the second support part in the second axial direction. In this embodiment, it has proven to be advantageous if the damping element has a substantially T-shaped cross section, the longitudinal legs of which likewise form retaining sections which project in the radial direction.

In a further advantageous embodiment of the centrifugal force pendulum device according to the invention, the retaining section of the damping element projecting in the radial direction has a shorter axial extension than the body section of the damping element. In this way, the body section of the damping element can interact with or support the pendulum in an advantageous manner, for example directly. In this embodiment, it is also preferred that the body section projects beyond the holding section in the first axial direction and/or the second axial direction. In this connection, for example, a substantially L-shaped cross section of the damping element is also conceivable, but preferably the T-shaped cross section of the damping element described above is used to form the holding section and the body section. It is also preferred that the body section is provided with the at least one resiliently compressible projection or that the body section is provided with at least one compressible cavity therein.

In a further advantageous embodiment of the centrifugal force pendulum device according to the invention, the damping element can be supported or supported in the radial direction on the first support part, preferably also on the second support part. The first support part and optionally the second support part thus obtain the additional function of supporting the pendulum supported on the damping element via the damping element, so that the first support part and optionally the second support part can be designed specifically for supporting the pendulum in the radial direction. In this embodiment, it is also preferred that the damping element is supportable or supported in the radial direction on the first support part, preferably also in the radial direction on the second support part, by means of the above-mentioned body section. In principle, the damping element can also be supported in the radial direction on the edge of the recess in the pendulum carrier in addition to the first support part or/and the second support part. However, in order to have more design freedom in the design of the recess and to simplify the configuration and manufacture, the damping element is supported in the radial direction on the first support part or the second support part while a distance is maintained between the edge of the recess and the holding section of the damping element. Preferably, this applies not only to the unstressed state of the damping element, but also to the stressed state of the damping element.

According to a further advantageous embodiment of the centrifugal force pendulum device according to the present invention, the damping element is supported on the first support part and/or the second support part, optionally by means of the body section, in the radial direction at the edge of the first support part and optionally of the second support part, in order to achieve a particularly stable and predeterminable support behavior. To this end, the first support member and/or the second support member preferably take a plate-like or disc-like configuration in order to form said edge.

In a further advantageous embodiment of the centrifugal pendulum device according to the invention, the damping element and the recess in the pendulum carrier are dimensioned such that the damping element can enter or enter the recess in its nominal position, preferably without deformation, in the axial direction, wherein the damping element is fixable or fixed in a loss-proof manner to the pendulum carrier by the first support part and optionally the second support part being attached thereto. In this way, a particularly simple production and assembly of the centrifugal force pendulum device is achieved without the need for additional positioning of the damping element in the radial direction or elastic deformation thereof; but it is sufficient to attach the first support part and optionally the second support part to the pendulum carrier after the damping element has been introduced into the recess, thereby ensuring that the damping element is not lost.

According to a further advantageous embodiment of the centrifugal pendulum device according to the invention, a common first carrier part is provided, on which the first support part and at least one further first support part for a further damping element are arranged, so that two or more first support parts can be transferred simultaneously into a position in which they support the respective damping element, so that the assembly of the first support parts, in particular their correct positioning relative to the damping elements, can be ensured. It has proven to be particularly advantageous here if the first carrier part and the at least two first support parts are formed integrally with one another. Irrespective of whether the common first carrier part is integrally formed with the first support part or not, it has also proved to be advantageous if the common first carrier part and/or the first support part is/are constructed as a sheet metal part, which can in particular simplify manufacture and assembly. It is further preferred in this connection that the first carrier part and the at least two first support parts are integrally formed with one another in order to form a common sheet metal part or sheet metal profile.

In a further advantageous embodiment of the centrifugal pendulum device according to the invention, a common second support part is provided, on which the second support part and at least one further second support part for a further damping element are arranged, so that two or more second support parts can be transferred simultaneously into a position supporting the respective damping element, which ensures the assembly of the second support parts, in particular their correct positioning relative to the damping element. It has proven to be particularly advantageous here if the second carrier part and the at least two second support parts are formed integrally with one another. Irrespective of whether the second carrier part is integrally formed with the second support part or not, it has also proved to be advantageous if the second carrier part and/or the second support part is constructed as a sheet metal part, which essentially simplifies the production and assembly. In this connection, it is particularly preferred if the second carrier part and the at least two second support parts are integrally formed with one another in order to form a common sheet metal part or sheet metal profile.

In order to further simplify the production of the centrifugal pendulum device, the second support part, optionally the second carrier part, is attached to the pendulum carrier indirectly via the first support part, optionally via the first carrier part. Thus, an attachment mechanism for attaching the second support member or the second carrier member directly to the pendulum carrier can be omitted here, since the second support member, optionally the second carrier member, is attached to the pendulum carrier indirectly via the first support member, optionally via the first carrier member. For example, this can avoid attaching the first and second support members directly to the pendulum carrier in a limited space, simplifying manufacturing.

In a further advantageous embodiment of the centrifugal force pendulum device according to the invention, the first support part, optionally the first carrier part, is arranged in the torque transmission path between the input side (preferably the input hub) of the centrifugal force pendulum device and the pendulum carrier. This achieves an advantageous functional separation or functional division, primarily because the first support part or the first carrier part serves not only to support the damping element but also to transmit the torque to the pendulum carrier, so that the first support part or the first carrier part assumes the torque input function, so that the design of the pendulum carrier can be correspondingly reduced. Although reference is consistently made herein to an input side or hub, it should be noted that an input side or hub is equivalent to an output side or hub of a centrifugal pendulum device, to which mainly the moment generated by the at least one pendulum due to the swinging motion can be returned.

In a further particularly preferred embodiment of the centrifugal pendulum device according to the invention, the pendulum has a first pendulum portion which is offset in a first axial direction with respect to the pendulum carrier and a second pendulum portion which is offset in a second axial direction with respect to the pendulum carrier. In this case, both pendulum sections are formed, for example, by one or more plate-shaped or plate-shaped elements, which can be clamped together in the case of a plurality of plate-shaped or plate-shaped elements per pendulum section. In this embodiment, in particular, no two disks of the pendulum carrier opposite to one another in the axial direction are required to enclose the at least one pendulum, so that a particularly compact design can be achieved.

In a further particularly advantageous embodiment of the centrifugal pendulum device according to the invention based on the above-described embodiment, the first pendulum section can be supported or supported on a first damping section of the damping element projecting from the recess in the first axial direction, and the second pendulum section can be supported or supported on a second damping section of the damping element projecting from the recess in the second axial direction. Since the damping elements are arranged in the recesses and extend through the recesses in the axial direction, the two pendulum segments achieve a supporting or supporting capability in a particularly simple manner without having to attach mutually independent damping elements to both sides of the pendulum carrier. Furthermore, in this embodiment, it is preferred that the first and second damping sections of the damping element are formed by the body section of the damping element. It is also preferred that at least one elastically compressible projection is provided on the damping section or that a compressible cavity is provided on the damping section.

In a further advantageous embodiment of the centrifugal pendulum device according to the invention, the first pendulum section and the second pendulum section are attached to one another by a connecting mechanism. The connecting mechanism extending in the axial direction between the two pendulum segments can be formed, for example, by one, two or more connecting struts. In this embodiment, it is preferred that the two pendulum segments are spaced apart from one another by the connecting means forming an intermediate free space into which the pendulum carrier can be introduced or introduced at least partially. In this way, a particularly space-saving and compact design of the centrifugal force pendulum device is achieved.

According to a further advantageous embodiment of the centrifugal pendulum device according to the invention, the pendulum segments can be supported or supported on the side of the first pendulum segment and the second pendulum segment facing inwards in the radial direction. At this point, the support is preferably done on the edges of the first and second pendulum segments in a disk-or plate-shaped configuration, optionally in a sandwich configuration. This embodiment has proved to be particularly advantageous in combination with the above-described embodiment in which the damping element is supported on the edge of the first support part and optionally of the second support part, for which purpose the first support part and/or the second support part preferably likewise adopt a disc-or plate-shaped configuration.

In a further particularly preferred embodiment of the centrifugal force pendulum device according to the invention, the damping element is held in a form-fitting and/or force-fitting manner, preferably only in a form-fitting and/or force-fitting manner and/or in a loss-proof manner in the recess of the pendulum carrier. In any case or in this embodiment, the adhesive attachment of the damping element to one of the pendulum carrier and/or the support part can be dispensed with, so that the production of the centrifugal pendulum device or the mounting of the damping element to the pendulum carrier and/or the respective support part is significantly simplified. It has also proven to be advantageous in this embodiment if the damping element is held only on the pendulum carrier and/or the support part in a form-fitting manner or in the recess.

In a further advantageous embodiment of the centrifugal force pendulum device according to the invention, the damping element or the material thereof is designed to be softer than the pendulum carrier and/or the pendulum. Alternatively or additionally, the damping element or the material thereof is configured to be softer than a guide for guiding the pendulum along the movement trajectory.

Drawings

The invention is described in detail below with reference to exemplary embodiments in conjunction with the following figures. In the figure:

fig. 1 shows a front view of a centrifugal force pendulum device;

FIG. 2 shows a sectional view of the centrifugal force pendulum device of FIG. 1 along the section line A-A;

FIG. 3 shows an enlarged front view of the damping element of FIG. 1 in isolation;

FIG. 4 shows a cross-sectional view of the damping element of FIG. 3 along section line B-B;

fig. 5 shows a front view of a second embodiment variant of the damping element in fig. 1 in isolation;

FIG. 6 shows a cross-sectional view of the damping element of FIG. 5 along section line C-C;

fig. 7 shows a front view of a third embodiment variant of the damping element in fig. 1 in isolation; and

figure 8 shows a cross-sectional view of the damping element of figure 7 along section line D-D.

Detailed Description

Fig. 1 and 2 show a centrifugal force pendulum device 2. In the figures, opposite

axial directions

4, 6, opposite

radial directions

8, 10 and opposite

circumferential directions

12, 14 of the centrifugal force pendulum device 2 are indicated by corresponding arrows, wherein the centrifugal force pendulum device 2 is rotatable about a rotational axis 16 extending in the

axial directions

4, 6. The centrifugal force pendulum device 2 has a pendulum carrier 18 in the form of a disk or plate, which can also be referred to as a disk or plate carrier. More precisely, the pendulum carrier 18 is of a ring-disk-or ring-plate-shaped design, wherein the ring-disk-or ring-plate-shaped pendulum carrier 18 extends essentially in a plane which extends in the

radial direction

8, 10 and in the

circumferential direction

12, 14. Pendulum carrier 18 may be attached to a component arranged in the torque transmission path of the drive train via a first support member (described in detail below) in a rotationally fixed manner inwardly in radial direction 10, such that pendulum carrier 18 is rotatable about axis of rotation 16.

At least one pendulum 20 is arranged on the pendulum carrier 18, in the embodiment shown a total of four pendulums 20 being arranged on the pendulum carrier 18. As shown in fig. 1, the pendulums 20 are distributed evenly over the pendulum carrier 18 in the

circumferential direction

12, 14. As shown in particular in fig. 2, each pendulum 20 is composed of a first pendulum portion 22, a second pendulum portion 24 and a connecting mechanism 26. The first pendulum section 22 is offset in the axial direction 4 relative to the pendulum carrier 18, while the second pendulum section 24 is offset in the opposite axial direction 6 relative to the pendulum carrier 18. The two pendulum segments 22, 24 are each of disk-or plate-shaped construction, which in the embodiment shown are sandwiched by two disks 28, 30, which may be metal disks, for example. The two pendulum segments 22, 24 or their disks 28, 30 are in turn of a substantially annular disk-shaped configuration, wherein they are in an annular circumferential configuration in the plane of the

radial directions

8, 10 and in the

circumferential directions

12, 14.

The two pendulum segments 22, 24 are attached to each other in the

axial direction

4, 6 via a connecting mechanism 26, wherein the two pendulum segments 22, 24 are spaced apart from each other in the

axial direction

4, 6 by the connecting mechanism 26, forming an intermediate free space 32. The pendulum carrier 18, which is in the form of a ring disk, can be introduced or introduced partially into this intermediate free space 32, so that it can also be referred to as intermediate pendulum carrier 18. In the illustrated embodiment, the connecting mechanism 26 is formed essentially by three

struts

34, 36, 38 extending in the

axial direction

4, 6, wherein the

struts

34, 36, 38 extend through

openings

40, 42, 44 in the pendulum carrier 18, respectively. The

posts

34, 36, 38 and

openings

40, 42, 44 are all matched or sized so that there is no contact between the

posts

34, 36, 38 and between the edges of the

openings

40, 42, 44 regardless of the relative position of the pendulum 20 with respect to the pendulum carrier 18.

Each pendulum 20 is movable relative to the pendulum carrier 18, wherein the movement can take place between two end positions of the pendulum 20. For this purpose, at least one guide, in the embodiment shown, two

guides

46, 48 are provided. The

guides

46, 48 are preferably essentially cylindrical rollers, wherein the

guides

46, 48 extend both through the

guides

50, 52 in the pendulum support 18 and in the guides in the two end-side pendulum segments 22, 24, wherein fig. 1 shows only the guides 50 'and 52' in the first pendulum segment 22, while the corresponding guides in the second pendulum segment 24 are not shown in detail. The curvature or curvature of each of the two

guides

50, 52 in the pendulum carrier 18 is adapted in a corresponding manner to the guides 50', 52' in the pendulum segments 22, 24, wherein the curvature or curvature of the

guides

50, 52 in the pendulum carrier 18 is opposite to the curvature or curvature of the guides 50', 52' in the pendulum segments 22, 24. In the embodiment shown, the shape of the

guides

50, 52 and 50', 52' can be referred to as kidney-shaped or kidney-shaped, wherein the

guides

50, 52 or 50', 52' have an elongated configuration and therefore not only a circular configuration.

In order to ensure low-noise operation of centrifugal pendulum device 2, each pendulum mass 20 is assigned a damping element 54 arranged or attached to pendulum mass carrier 18, via which damping element respective pendulum mass 20 is indirectly supportable or supported on pendulum mass carrier 18 before reaching at least one, preferably both, end positions. Fig. 1 to 4 show a first embodiment variant of damping elements 54 which are not only attached to the side of the ring-disk pendulum carrier 18 facing the

axial direction

4, 6, but are also arranged in recesses 56 of the pendulum carrier 18, wherein the recesses 56 shown in the figures are window-like recesses. Alternatively, the recess 56 can also be formed by an edge-side cutout in the pendulum carrier 18, but is preferably a window-like recess 56 as shown.

The damping elements 54 are held in the respective recesses 56 only in a form-fitting and/or force-fitting manner (in the present case only in a form-fitting manner) and in a loss-proof manner. Damping element 54 is of a one-piece and resilient construction that is made of a material that is softer than the material of pendulum carrier 18 and softer than the material of the associated pendulum 20. In addition, the damping element 54 or its material is softer than the material of the above-mentioned

guides

46, 48, and also softer than the support member described in detail later.

The recesses 56 are essentially configured as recesses 56 which are elongated in the

circumferential direction

12, 14, wherein each recess 56 is delimited in the circumferential direction 12 by an edge section 58 of the pendulum carrier 18, in the circumferential direction 14 by an edge section 60 thereof, in the radial direction 8 outwardly by an edge section 62 thereof and in the radial direction 10 inwardly by an edge section 64 thereof, while the edge sections 64 can be seen in particular in fig. 2. The damping element 54 likewise adopts an elongate configuration in the

circumferential directions

12, 14 and is curved in accordance with the

circumferential directions

12, 14. In this regard, it may also be referred to as a damping element 54 of substantially circular-arc configuration. The damping element 54 is substantially T-shaped in cross-section (see, in particular, fig. 2 and 4). In this way, the damping element 54 has a cross section with a main section 66, which main section 66 extends substantially in the

axial direction

4, 6, such that one side projects from the recess 56 in the axial direction 4 to form a first damping section 68 and the other side projects from the recess 56 in the axial direction 6 to form a second damping section 70. The body section 66 has a length a in the

axial direction

4, 6. In addition, the damping element 54 or its cross section has a retaining section 72, which retaining section 72 projects inward in the radial direction 10 and is arranged on the side of the body section 66 facing inward in the radial direction 10, wherein the retaining section 72 is arranged centrally on the body section 66 with respect to the

axial direction

4, 6 and has a length b which is smaller than the length a of the body section 66. Furthermore, the length b of the holding section 72 corresponds substantially to the thickness or thinness of the annular disk-shaped pendulum carrier 18.

The damping element 54 and the respective associated recess 56 are dimensioned such that the damping element 54 can be brought into or into its nominal position within the recess 56 in one of the axial directions 4, 6 (as shown in fig. 1 and 2) without elastic or plastic deformation. But such that damping elements 54 are not yet secured or fixed to pendulum carrier 18 in a loss-proof and form-fitting or/and force-fitting manner, each damping element 54 can be secured to pendulum carrier 18 in a loss-proof manner by attaching first support member 74, which is initially separately configured, and second support member 76, which is initially separately configured, to pendulum carrier 18 either indirectly or directly, as described in more detail below.

The damping element 54 is supportable or supported in a first axial direction 4 on said first support member 74 attached to the pendulum carrier 18, while the damping element 54 is also supportable or supported in a second axial direction 6 opposite to the first axial direction 4 on a second support member 76 attached at least indirectly to the pendulum carrier 18.

As is shown in particular in fig. 1, each of the four damping elements 54 is associated with a first support part 74, on which first support part 74 the associated damping element 54 can be supported or supported in the first axial direction 4. The same applies to the second support parts 76, i.e. each of the damping elements 54 is associated with one second support part 76, on which second support part 76 the damping element 54 can be supported or supported in the second axial direction 6. In the attached position, the two support parts 74, 76 are flush with a part of the associated recess 56 in the

axial direction

4, 6, respectively. In addition, the first support part 74 is associated with a common first carrier part 78, the first support part 74 being arranged and attached to this first carrier part 78, for which purpose the first support part 74 is integrally formed with the first carrier part 78. The first carrier part 78 and the first support part 74 are constructed as sheet metal parts, wherein the first carrier part 78 is of substantially annular disk-shaped construction, while the first support part 74 projects outwardly in the radial direction 8 beyond the first carrier part 78, so that a material-saving and lightweight assembly can be provided. In addition, the first support part 74 is attached to the ring-disk-shaped pendulum carrier 18 in such a way that the end of the first support part 74 facing inwards in the radial direction 10 is arranged in the torque transmission path between the input side 80 (preferably the input hub) of the centrifugal pendulum device 2 and the pendulum carrier 18. In other words, a torque is introduced via the input side 80 of the first support part 74, so that the pendulum carrier 18 is acted upon only indirectly by the torque. In order to be able to attach the input side 80 or the first support part 74 of the centrifugal force pendulum device 2 into the torque transmission path of the drive train, it has a corresponding attachment hole 82 as shown in fig. 1. In this example, the first support member 74, which is initially configured separately from the pendulum carrier 18, can be attached to the pendulum carrier 18 in any manner, such as by welding, screwing, etc., as shown in fig. 1 and 2, with the first support member 74 preferably riveted to the pendulum carrier 18.

A common second carrier part 84 is also associated with the second support part 76, the second support part 76 for the damping element 54 being arranged on this second carrier part 84, the second carrier part 84 and the second support part 76 in turn being integrally molded with one another as a sheet metal part in the embodiment shown. The second carrier part 84 is also of substantially annular disc-shaped configuration, while the second support part 76 projects outwardly beyond the second carrier part 84 in the radial direction 8. In principle, the individual second support members 76 or the common second carrier member 84 may be attached directly to the pendulum carrier 18. However, to avoid excessive machining of the pendulum carrier 18 from the risk of undesired deformation thereof, the second support member 76 (more precisely the common second carrier member 84 of the second support member 76) is indirectly attached to the pendulum carrier 18 via the first support member 74 (more precisely the common first carrier member 78). More specifically, the common second carrier 84 extends inwardly in the radial direction 10 beyond the edge of the ring-disk pendulum carrier 18 facing inwardly in the radial direction 10 for attachment to the first carrier 78 at an attachment point 86. The common second carrier part 84 can also be attached to the common first carrier part 78 by all customary attachment methods, in which case riveting, welding, screwing etc. are also conceivable.

It can be seen from the above that the individual damping elements 54 can be supported or supported on the pendulum carrier 18 in the first axial direction 4 only indirectly via the first support part 74 and the common first carrier part 78. Thus, damping element 54 is not directly supported on pendulum carrier 18 in first axial direction 4. The same applies to the support in the second axial direction 6. The individual damping elements 54 can be supported or supported in the second axial direction 6 only indirectly via the second support part 76 and the common second carrier part 84 on the common first carrier part 78, which common first carrier part 78 can in turn be supported or supported on the pendulum carrier 18. Therefore, each damping element 54 is not directly supported on pendulum carrier 18 in second axial direction 6.

It has proven to be particularly advantageous for the T-shaped cross section of the damping element 54 to be introduced into the recess 56 and arranged in a loss-proof manner. The retaining section 72 of the damping element 54, which projects inward in the radial direction 10, can be supported or supported on the first support part 74 in the first axial direction 4 and on the second support part 76 in the second axial direction 6. In this case, the main section 66 of the damping element 54 projects in both the first axial direction 4 and the second axial direction 6 beyond the retaining section 72 arranged radially more inwardly and projects from the recess 56. Due to the thus projecting body section 66 of the damping element 54, this damping element 54 is indirectly supportable or supported on the pendulum carrier 18 also in the radial direction 10 inwardly via the first and second support parts 74, 76. More precisely, the side of the first damping section 68 of the main section 66 of the damping element 54 facing inwards in the radial direction 10 can be supported or braced on the edge 88 of the first support part 74 in the plate-shaped or plate-shaped configuration facing outwards in the radial direction 8, while the side of the second damping section 70 of the main section 66 of the damping element 54 facing inwards in the radial direction 10 can be supported or braced on the edge 90 of the second support part 76 in the plate-shaped or plate-shaped configuration facing outwards in the radial direction 8.

In addition to this, the damping element 54 is supported in the radial direction 10 via the support parts 74, 76 in such a way that, in the stressed and unstressed state of the damping element 54, a distance c exists between the retaining section 72 and the edge section 64 of the recess 56. Thus, the retaining section 72 is not supported on the edge or edge section 64 of the notch 56 in the pendulum carrier 18.

The placement of damping element 54 within notch 56 both conserves space in its placement and provides a secure and targeted support for associated pendulum 20. The first pendulum section 22 can be supported before the pendulum 20 reaches the respective end position on the side of the first damping section 68 facing outward in the radial direction 8, while the second pendulum section 24 can be supported or supported on the side of the second damping section 70 of the same damping element 54 facing outward in the radial direction 8.

It can be seen from the above that the damping element 54 is an elastically deformable damping element 54. The damping element 54 shown in the figures is not only of one-piece construction, but is also made uniformly of the same material, preferably an elastomer. In general, the damping element is made of the same material in all its sections and regions, and therefore has the same elasticity, at least in terms of material. Furthermore, due to the elasticity of the damping element 54, the respective pendulum 20 can be supported or supported on the pendulum carrier 18 first in a first support position via the damping element 54 before reaching at least one end position or both end positions, wherein the pendulum 20 can be moved further past the first support position against a restoring force caused by the elastic deformation of the damping element 54 into a second support position, in which case the pendulum 20 is still indirectly supported on the pendulum carrier 18 via the damping element 54, but the damping element 54 undergoes a greater elastic deformation in the second support position. In this case, the curve of the characteristic curve of the restoring force acting on the restoring force of the oscillating weight 20 between the first and second support positions deviates from a linear curve, which is achieved by various embodiment variants of the damping element 54, which are described in more detail below with reference to fig. 3 to 8.

In the first embodiment variant of the damping element 54 shown in fig. 1 to 4, the damping element 54 has a support side 92 facing the pendulum 20 and facing outwards in the radial direction 8 and a support side 94 facing inwards in the radial direction 10 and facing the pendulum carrier 18 or the support parts 74, 76. As shown in particular in fig. 4, the two

support sides

92, 94 are arranged on the main section 66 of the damping element 54, more precisely on the first damping section 68 and the second damping section 70 of the main section 66 of the damping element 54. The support side 94 which can be supported or supported on the support parts 74, 76 substantially matches the edges 88, 90 of the support parts 74, 76, here with an arcuate curve in the

circumferential direction

12, 14. On the other hand, the support side 92 facing the pendulum 20 is provided with a plurality of elastically compressible projections 96, which project outwards in the radial direction 8 and thus in the direction of the pendulum 20. The projection 96 is also configured to taper outwardly in the direction of the pendulum 20 and thus in the radial direction 8. The projections 96 are configured as projections 96 which are elongated in the

axial direction

12, 14, these projections 96 extending on one side along the first damping section 68 and on the other side along the second damping section 70. The projections 96 are also arranged such that they succeed one another in the

circumferential direction

12, 14, thus forming an intermediate recess 98. In the embodiment variant shown, the central projection is omitted in the region of the main body section 66, but in principle it is also possible for the projections 96 or recesses 98 to be arranged consecutively on the main body section 66 in the

axial direction

4, 6 in order to support the possibility that successive projections can be supported on the edge section 62. Although the projections 96 are configured to obtain a wavy or arcuate support side 92, the projections 96 may have any shape. For example, they can be configured to taper to the outside in the radial direction 8 and thus have a triangular cross-section.

Due to the damping element 54 thus formed, the pendulum 20 is first supported in the first support position only at the end of the projection 96 facing outwards in the radial direction 8. During the further course of the elastic compression of the damping sections 68, 70 or the projections 96 arranged thereon, a greater part of the individual projections 96 is compressed until they reach the level of the recesses 98, at which point the individual damping sections 68 or 70 finally reach compression over their entire circumference. In other words, the restoring force increases at least once over-proportionally in the direction from the first support position to the second support position, in which case the restoring force profile may have at least one discontinuity, depending on the shape of the projection 96. It can also be seen that the curve of the characteristic line of the restoring force acting on the restoring force of the oscillating weight 20 deviates from a linear curve, which is due only to the shape of the damping element 54 and the adjacent oscillating weight 20 and the adjacent support members 74, 76, and not to the provision of a damping element 54 consisting of a different elastic material. In this connection, a particularly simple damping element 54 and thus a particularly simple centrifugal pendulum device results.

Fig. 5 and 6 show a second embodiment variant of a damping element 54 for the centrifugal force pendulum device 2 according to fig. 1 and 2. This second embodiment variant substantially corresponds to the first embodiment variant according to fig. 3 and 4, so that only the differences are explained below, identical or similar parts being provided with the same reference numerals and the above also applying correspondingly.

In a second embodiment variant of the damping element 54, the projections 96 and the recesses 98 are not arranged on the support side 92 facing outwards in the radial direction 8, but on a support side 94 facing inwards in the radial direction 10, which support side 94 can be supported on the edges 88, 90 of the support parts 74, 76 facing outwards in the radial direction 8. The pendulum mass 20 can be supported or supported on the support side 92 over a large area at once in the first support position, but not on the support side 94 facing inwards in the radial direction 10, but rather on the edge 88, 90 in the first support position, i.e. firstly only the upper region of the projection 96 facing inwards in the radial direction 10 is supported. In the further process, the projection 96 is also elastically compressed until the recess 98 disappears, and the edges 88, 90 of the support members 74, 76 also bear on the base of the recess 98 and thus completely on the respective damping section 68, 70 before the pendulum 20 reaches the second support position, whereby the restoring force characteristic curve has the above-mentioned curve deviating from a linear curve.

Although not shown in the figures, in an advantageous embodiment variant, both the projections 96 shown in fig. 3 and 4 are provided on the support side 92 and the projections 96 shown in fig. 5 and 6 are provided on the support side 94.

Fig. 7 and 8 show a third embodiment variant of a damping element 54 for the centrifugal force pendulum device 2 according to fig. 1 and 2, wherein this third embodiment variant substantially corresponds to the embodiment variant described above with reference to fig. 1 to 6, so that only the differences will be explained below, identical or similar parts being provided with the same reference numerals and the same applies correspondingly.

In contrast to the two embodiment variants according to fig. 3 to 6, the third embodiment variant according to fig. 7 and 8 omits the projection 96 or the recess 98 on the support sides 92 and 94. Instead, at least one compressible cavity is formed in the damping element 54. More specifically, a first cavity 100 is configured in the first damping section 68, and a second cavity 102 is configured in the second damping section 70. The two

cavities

100, 102 are each delimited in the radial direction 8 outwardly by a first wall section 104 that can be supported on the pendulum mass 20 and in the radial direction 10 inwardly by a second wall section 106 that can be supported on the pendulum mass carrier 18 or the support elements 74, 76. In the embodiment shown, the two

cavities

100, 102 are open in opposite

axial directions

4, 6, wherein the

cavities

100, 102 extend substantially in the

circumferential direction

12, 14.

When the damping sections 68, 70 are elastically compressed, the pendulum mass 20 starts from the first supporting position, first only the wall sections 104 and 106 approach each other in the

radial direction

8, 10 due to the

compression cavities

100 and 102, after which the two wall sections 104, 106 support each other and in the further course likewise elastically deform, which leads to a disproportionately increased restoring force acting on the pendulum mass 20 before the second supporting position is reached.

List of reference numerals

2 centrifugal pendulum device

4 (first) axial direction

6 (second) axial direction

8 radial direction

10 radial direction

12 circumferential direction

14 circumferential direction

16 axis of rotation

18 pendulum bob carrier

20 pendulum bob

22 first pendulum section

24 second pendulum section

26 connection mechanism

28 disc

30 disc

32 free space

34 support post

36 post

38 support

40 opening

42 opening

44 opening

46 guide member

48 guide member

50 guide part

52 guide part

54 damping element

56 recess

58 edge section

60 edge section

62 edge segment

64 edge segment

66 body section

68 first damping section

70 second damping section

72 holding section

74 first support member

76 second support member

78 first bearing part

80 input side

82 attachment hole

84 second carrier part

86 attachment site

88 edge

90 edge

92 support side

94 support side

96 convex part

98 concave part

100 first cavity

102 second cavity

104 first wall segment

106 second wall segment

Length of a

b length

c distance

Claims

1. A centrifugal pendulum device (2) comprising a rotatable pendulum carrier (18) and at least one pendulum (20) arranged thereon, which is movable relative to the pendulum carrier (18) between two end positions by means of at least one guide (46, 48) extending in a guide (50, 52; 50', 52') in the pendulum carrier (18) and the pendulum (20), wherein a damping element (54) is arranged on the pendulum carrier (18), via which the pendulum (20) can be supported or supported on the pendulum carrier (18) in a first support position before reaching at least one end position or both end positions, and wherein the pendulum (20) can be moved from the first support position to a second support position against a restoring force caused by elastic deformation of the damping element (54), characterized in that the curve of the characteristic line of the restoring force acting on the restoring force of the oscillating weight (20) between the first and second support positions deviates from a linear curve.

2. Centrifugal pendulum device (2) according to claim 1, characterized in that the restoring force increases at least once over-proportionally in the direction from the first support position to the second support position and/or in that the restoring force characteristic line has at least one discontinuity.

3. Centrifugal pendulum device (2) according to one of claims 1 or 2, characterized in that the damping element (54) has a support side (92, 94) facing the pendulum (20) or the pendulum carrier (18), on which support side the pendulum (20) or the pendulum carrier (18) can be supported or supported, wherein at least one elastically compressible bulge (96) is provided on the support side (92, 94), which bulge is preferably configured to taper in the direction of the pendulum (20) or the pendulum carrier (18), wherein particularly preferably two or more bulges (96) are provided.

4. The centrifugal force pendulum device (2) according to claim 3, characterized in that the elevations (96) are designed as elongated elevations which preferably extend in the axial direction (4, 6) of the centrifugal force pendulum device (2) and particularly preferably follow one another in the circumferential direction (12, 14) of the centrifugal force pendulum device (2).

5. Centrifugal pendulum device (2) according to one of the preceding claims, characterized in that at least one compressible cavity (100, 102) is formed in the damping element (54), which is delimited on one side by a wall section (104) of the damping element (54) that can be supported on the pendulum (20) and on the other side by a wall section (106) of the damping element (54) that can be supported on the pendulum carrier (18), wherein the wall sections (104, 106) are preferably mutually supported and particularly preferably elastically deformable as a result of the compression of the cavity (100, 102).

6. Centrifugal force pendulum device (2) according to one of the preceding claims, characterized in that the damping element (54) is made uniformly of the same material, preferably an elastomer, and/or is of one-piece construction.

7. Centrifugal pendulum device (2) according to one of the preceding claims, characterized in that the damping element (54) is arranged in a recess (56) of the pendulum carrier (18) and is supportable in a first axial direction (4) or on a first support member (74) to which the pendulum carrier (18) is attached, wherein the damping element (54) is preferably supportable or supported in a second axial direction (6) opposite to the first axial direction (4) on a second support member (76) to which the pendulum carrier (18) is attached, the damping element (54) being particularly preferably supportable or supported on the pendulum carrier (18) only indirectly via the first support member (74) in the first axial direction (4) and optionally also supportable or supported on the pendulum carrier (18) only indirectly via the second support member (76) in the second axial direction (6) as well .

8. Centrifugal pendulum device (2) according to claim 7, characterized in that the damping element (54) has a holding section (72) which projects in the radial direction (10) and which can be supported or supported on the first support part (74) in the first axial direction (4), preferably also on the second support part (76) in the second axial direction (6), wherein the holding section (72) particularly preferably has a shorter axial extension (b) than a body section (66) of the damping element (54), which body section (66) projects beyond the holding section (72) optionally in the first axial direction (4) and/or in the second axial direction (6).

9. Centrifugal pendulum device (2) according to claim 8, characterized in that the damping element (54) can be supported or supported on the first support part (74), preferably also on the second support part (76), optionally by means of the body section (66) in the radial direction (10), wherein particularly preferably a support takes place when a distance (c) is reached between the edge of the recess (56) and the holding section (72) and/or on the edges (88; 90) of the first and optionally second support parts (74; 76).

10. Centrifugal pendulum device (2) according to one of claims 7 to 9, characterized in that the damping element (54) and the recess (56) are dimensioned such that the damping element (54) can be brought into its nominal position in the recess (56), preferably without deformation, in the axial direction (4; 6) or can be fixed or fixed in a loss-proof manner on the pendulum carrier (18) by attaching the first support part (74), particularly preferably the second support part (76), to the pendulum carrier (18).