WO2012062239A1

WO2012062239A1 - Centrifugal pendulum mechanism

Info

Publication number: WO2012062239A1
Application number: PCT/DE2011/001057
Authority: WO
Inventors: Florian Baral; David SCHNÄDELBACH
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2010-08-19
Filing date: 2011-05-11
Publication date: 2012-05-18
Also published as: DE112011102751B4; DE202011004695U1; DE112011102751A5; CN103180635A; DE102011101162A1; CN103180635B

Abstract

The invention relates to a centrifugal pendulum mechanism (10), comprising pendulum masses (18), which are arranged axially on both sides of a pendulum mass carrier (12) that can be rotated about a rotational axis (100) and which form a pendulum mass pair, wherein the pendulum masses are fastened to each other with the aid of at least one fastening element (20) that reaches through an opening (22) in the pendulum mass carrier (12) in order to form the pendulum mass pair and wherein the pendulum mass pair can be pivoted to a limited extent relative to the pendulum mass carrier with the aid of at least one rolling element (24) that rolls at an outer surface (30) along an inner surface (32) of a track (26) formed in the pendulum mass carrier and wherein a first axial point (34) and a second axial point (36) lie on the inner surface (32) at a first circumferential position along the axial extent of the inner surface and wherein the first and second axial points are radially spaced from each other in order to form an axial course of the inner surface and wherein the outer surface of the rolling element has at least two different diameters (48, 50) axially spaced from each other on a section (46) that axially covers the inner surface of the track.

Description

Centrifugal force delineating

The invention relates to a centrifugal pendulum device with the features according to the preamble of claim 1.

From DE 10 2006 028 556 A1 i st known in a drive train of a motor vehicle torsional vibration damper known. The torsional vibration damper allows transmission of a torque coming from a drive side, for example, from an internal combustion engine to an output side, such as a transmission and beyond a dusk can tion of torsional vibrations as they can be caused by the internal combustion engine, cause. For this purpose, the torsional vibration damper on a drive part and on the effect of at least one energy storage element with respect to the drive part limited rotatable output part.

Furthermore, the torsional vibration damper comprises a centrifugal pendulum device for further damping and / or Ti Igung the torsional vibrations in the drive train. The centrifugal pendulum device comprises a rotatable about an axis of rotation pendulum mass carrier and at least one arranged Pendelmassenpaar consisting of two axially on both sides of the pendulum mass carrier s opposite Pendelm asses, which are interconnected by means of cutouts in the pendulum mass carrier by cross-fasteners.

The pendulum pair is limited relative to the pendulum mass carrier via two rolling elements pivotally limited. For this purpose, the rolling element comprises an outer surface which can be unrolled along an inner surface of a career in the pendulum mass carrier ausgebil Deten career and whereby the rolling element against the pendulum mass carrier limited t is verschenkbar. The inner surface is flat along its axial extent, that is along the axial extent of the inner surface is a first axial point and a second axial point in the rolling surface and the first and second axial point have a same radial distance from the Drehachs e. Under certain circumstances, it can lead to an axial displacement of the rolling element in the career of the pendulum mass carrier.

The object of the invention is to improve the leadership of a pendulum mass carrier on a pendulum, in particular to improve the axial guidance. This object is achieved by a centrifugal pendulum device with the features of claim 1.

Accordingly, a centrifugal pendulum with m axially arranged on both sides of a rotatable about an axis pendulum mass carrier and a pendulum mass pair forming pendulum masses proposed, the pendulum masses are formed to form the pendulum mass pair with the help of at least one by a cutout in the pendulum mass carrier fastening element together and wherein the pendulum mass pair with the help of at least one with an outer surface along an inner surface of a career formed in the pendulum mass carrier rolling element limited verschenkbar limited to the pendulum mass carrier and wherein at a first circumferential position along the axial extent of the inner surface, a first axial point and a second axial point in the Inner surface is located. In this case, the first and the second axial point for forming an axial course of the inner surface are radially spaced from each other, wherein the outer surface of the rolling element on a the inner surface of the raceway axially overlapping portion at least two different and axially spaced-apart diameter. As a result, an axial guidance of the rolling element in the raceway and in particular an axial securing can be effected.

The centrifugal pendulum device is preferably arranged on a torsional vibration damper and / or on a dual-mass flywheel and / or in a hydrodynamic torque converter. The rolling element is advantageously designed as a rolling element or as a roller bearing. Also, the rolling element may be formed as a stepped bolt.

In a preferred embodiment of the invention, the axial course of the outer surface of the Abroiielements is wedge-shaped, convex, triangular or rectangular. Also, a paragraph may be provided in the outer surface.

In an advantageous embodiment of the invention, the axial course between the first and second axial point is continuous and / or unsteady. In this case, a shoulder, a groove or the like may be incorporated in the inner surface. Also, the axial course of the inner surface L-shaped and / or be formed as a continuous curvature.

In a further embodiment of the invention, the inner surface has a third axial point at the first circumferential position along the axial extent of the inner surface. at the third axial point has a radial distance to the second axial point and wherein the second axial point is located axially between the first axial point and the third axial point. Advantageously, the inner surface between the first and third axial point is concave or convex. Also, the axial course may be pointed and / or have a plurality of deflection points and / or be formed wave-shaped. Also, a rectangular course can be provided.

In an advantageous embodiment of the invention, the rolling element on a complementary to the axial course of the inner surface formed on the outer surface. For example, the axial course of the inner surface may be concave and the outer surface may be convex or spherical.

In a further embodiment of the invention, the axial course of the inner surface on the circumferential side in sections, that is formed over a portion of the circumference of the inner surface. Preferably, the axial course of the inner surface is formed circumferentially along the during operation of the centrifugal pendulum device by the rolling movement of the rolling element on the track ü coated inner surface. Also, the axial course over the entire circumference of the inner surface may be formed.

In a further embodiment of the invention further complementary raceways are formed in the pendulum masses of the pendulum mass pair complementary to the track in the pendulum mass carrier, in which the rolling element is received and unrolled. In this case, the rolling element is preferably received and unrolled in the raceways of the pendulum masses with an axially central portion in the raceway of the pendulum mass carrier and mounted on both sides of the central portion axially outer portions.

Further advantages and advantageous embodiments of the invention will become apparent from the description and the drawings, in whose Darste tion in favor of clarity on a true to scale reproduction was ver. All features explained are applicable not only in the specified combination, but also in other combinations or in isolation, without departing from the scope of the invention.

The invention will be described in detail below with reference to the figures. They show in detail:

Figure 1: side view of a centrifugal pendulum device according to the prior art. FIG. 2: Spatial cross-sectional view of a section of the centrifugal pendulum device from FIG. 1.

Figure 3: Spatial cross-sectional view of a section of a centrifugal pendulum device in a specific embodiment of the invention.

Figure 4: cross section through egg nen section of the centrifugal pendulum device of Figure 3.

Figure 5: cross section through egg nen section of a centrifugal pendulum device in a further specific embodiment of the invention.

Figure 6: cross section through egg nen section of a centrifugal pendulum device in a further specific embodiment of the invention.

In Figure 1, a centrifugal pendulum device 10 according to the prior art is shown in side view. The centrifugal pendulum device 10 includes a rotatable around a Drehachs e 100 Pen delmassenträger 12 m it in a radially inner region introduced spring windows 14 for receiving energy storage elements, such as coil springs. The energy storage elements are connected to the pendulum mass carrier 12 and a damper component of a Torsionsschwingungsdäm not shown here pfers in operative connection to allow a rotation of the damper member relative to the pendulum mass carrier 12 cherelemente under the effect of Energiespei.

Radially within the spring window 14, an output hub 16 is fixed to the pendulum mass carrier 12, in particular riveted, wherein the output hub 16 via a toothing 18 m with a transmission gear neinshaft rotatably connected.

Radial outside of the pendulum mass carrier 12 four pendulum masses 18 are arranged with it not shown here axially gege lying on the other Be te of the pendulum mass carrier 12 pendulum masses connected to four pendulum masses si nd. The connection is made with the help of three fasteners 20th per pendulum mass pair, wherein the fastening elements 20 are fixedly connected to the pendulum masses 18 and pass through cutouts 22 in the pendulum mass carrier 12 through n. The cutouts 22 are shaped such that a pivoting of the pendulum masses 18 can be made possible over the pendulum mass carrier 12 along a pendulum track. In particular, the cutouts 22 are kidney-shaped.

The actual pivotal movement of the pendulum masses 18 relative to the pendulum mass carrier 12 is made possible by rolling elements 24 and correspondingly in the pendulum mass carrier 12 and in the pendulum masses 18 shaped raceways 26, 28. For this purpose, two rolling elements 24, for example rolling elements, in particular stepped bolts in the respective raceways 26, 28 are arranged per pendulum mass pair. The La ufbahnen 28 in the P endelmassen 18 of a pendulum mass pair are kom plementär to the track 26 in the pendulum mass carrier 12 ausgebil det. In particular, the Lau is fbahn 26 in the pendulum mass carrier 12 ni erenförmig and the raceways 28 in the pendulum masses 18 curved in opposite directions.

FIG. 2 shows a spatial cross-sectional view of a section of the centrifugal pendulum device 10 from FIG. 1. The roller elements 24 each have an outer surface 30 with which they can be unrolled along an inner surface 32 of the track 26 in the pendulum mass carrier 12. The inner surface 32 is flat along its axial extension with respect to an axial direction 102, that is, along the axial extent of the inner surface 32, a first axial point 34 and a second axial point 36 have an equal radial distance in the inner surface with respect to a radial direction 104 from the axis of rotation 100.

FIG. 3 shows a spatial cross-sectional view of a section of a centrifugal pendulum device 10 in a specific embodiment of the invention. The rolling element 24 is preferably formed as a rolling element and in particular as a stepped bolt, the axially central portion 38 which axially overlaps the raceway 26 of the pendulum mass carrier 12 has a larger diameter as the two adjacent axially outer Bereic he 40, 42. The peripheral surfaces 42 of two axially outer portions 40, 42 which sroll in the raceways 28 of the pendulum masses 18 of the pendulum mass pair si nd are cylindrical.

4 shows a cross section through a section of the centrifugal pendulum device 10 of Figure 3. In this case, the rolling element 24 at a circumferential position of the circumference of the raceway forming inner surface 32 along the axial direction 102 has a first ax ial point 34 and a second axial point 36 wherein the second axial point 36 is axially spaced from the first axial point 34. The first and second axial points 34, 36 are also in relation to each other for forming an axial course of the inner surface 32 the radial direction 104 is radially spaced from the rolling element. The axial course of the inner surface 32 is continuous and curved between the first and second axial points 34, 36. Furthermore, the inner surface 32 at the first and second axial point 34, 36 associated circumferential position along the axial extent of the inner surface 32 has a third axial point 44, wherein the third axial P is 44 a radial distance from the second axial point 36 and in particular has a sliding surfaces radial distance as the first axial point 34. The second axial point 36 lies axially between the first axial point 34 and the third axial point 44. The inner surface 32 is formed concave as a whole between the first and the third axial point 34, 44.

Complementary to the axial course of the inner surface 32, the outer surface 30 of the rolling element 24 is formed such that at least one of the inner surface 32 of the race 26 axially overlapping portion 46 at least two different and axially spaced diameter 8, 50 has. In this case, a mean diameter 50 is greater than the axial outer diameter 48 and the outer surface 30 is generally spherical and formed as in the concave axial course of the inner surface 32 of the raceway 26 inserting surface. As a result, an axial guidance of the rolling element 24 in the raceway 26 and in particular an axial securing can be effected.

The axial course of the inner surface 32 is circumferentially formed in sections, in particular over a peripheral portion of the inner surface 32 is swept over during operation of the centrifugal pendulum device 10 by the Abrol Ibewegung of the rolling element 24 on the track 26.

FIG. 5 shows a cross section through a section of a centrifugal pendulum device 10 in a further specific embodiment of the invention. In this case, the axial course of the outer surface 30 of the rolling element 24 at a circumferential position in a career of the pendulum mass support 12 overlapping area two kinks 52, wherein the inner surface 32 of the track of the pendulum mass support 12 is formed correspondingly complementary to the receiving of the rolling element 24.

Figure 6 shows a cross section through a section of a centrifugal pendulum device 10 in a further specific embodiment of the invention. Here, the axial course of the outer surface 30 of the rolling element 24 and, correspondingly, the shape of the track of the pendulum mass carrier 12 is formed triangularly with a kink 52. LIST OF REFERENCES

Centrifugal pendulum device

Pendulum mass carrier

spring windows

output hub

gearing

fastener

neckline

rolling element

career

outer surface

palm

First axial point

Second axial point

section

Third axial point

section

diameter

kink

axis of rotation

axial direction

radial direction

Claims

claims

1. centrifugal pendulum device (10) with axially on both sides of a pivot axis (100) rotatable pendulum mass carrier (12) arranged and a Pe bundle mass pair forming pendulum masses (18), wherein the pendulum masses (18) for forming the pendulum mass pair with the help of at least one by a Cutout (22) in the pendulum mass carrier (12) by cross-fastener (20) are fastened together and wherein the pendulum mass pair by means of at least one with an outer surface (30) along an inner surface (32) formed in the pendulum mass carrier (12) career ( 26) unrollable n rolling element (24) relative to the pendulum mass carrier (12) is tesch ver limited and wherein at a first circumferential position along the axial Erst reck ung the inner surface (32) has a first axial point (34) and a second axial point (36 ) in the inner surface (32) is characterized in that the first and the second axial point (34, 36) for forming an axia The outer surface (30) of the rolling element (24) on at least one of the inner surface (32) of the raceway (26) axially overlapping portion (46) at least two different and axially spaced-apart diameter len of the inner surface (32) (48, 50).

Second centrifugal pendulum device (10) according to claim 1, characterized in that the axial course of the inner surface (32) between the first and second axial point (34, 36) is continuous and / or unspecified.

3. centrifugal pendulum device (10) according to any one of claims 1 or 2, characterized in that the inner surface (32) at the first circumferential position along the axial extent of the inner surface (32) has a third axial point (44) and the third axi ale point (44) has a radial distance to the second axial point (36), wherein the second axial point (36) lies axially between the first axial point (34) and the third axial point (44).

4. centrifugal pendulum device (10) according to claim 4, characterized in that the inner surface (32) between the first and third axial point (34, 44) is concave or convex.

5. centrifugal pendulum device (10) according to one of claims 1 to 4, characterized in that the rolling element (24) has a complementary to the axial course of the inner surface (32) formed outer surface (30).

Centrifugal pendulum device (10) according to one of claims 1 to 5, characterized in that the axial course of the inner surface (32) is formed circumferentially in sections.

7. centrifugal pendulum device (10) according to claim 6, characterized in that the axial course of the inner surface (32) circumferentially along during operation of the centrifugal pendulum means (10) by the Abrol Ibewegung of the rolling element (24) on the raceway (26) of the rolling element (24) swept inside surface (32) is formed.

8. centrifugal pendulum device (10) according to one of claims 1 to 7, characterized in that in the pendulum masses (18) of the pendulum mass each complementary to the track (26) formed in the pendulum mass carrier (12) further raceways (28) are formed in where the rolling element (24) is received and unrolled.