CENTRIFUGAL PENDULUM DEVICE HAVING AN END STOP

Abstract

A centrifugal pendulum device is arranged in the drive train of a motor vehicle, including at least one centrifugal pendulum which is arranged on a carrier disc and can perform a relative movement in relation to the carrier disc along a predetermined pendulum path. At least one radial stop surface is arranged on the carrier disc and the centrifugal pendulum has at least one stop means.

Claims

1. A centrifugal pendulum is arranged in a drive train of a motor vehicle, the centrifugal pendulum device comprising: at least one centrifugal pendulum arranged on a carrier disc and is configured to perform a movement relative to the carrier disc along a predetermined pendulum path, wherein at least one radial stop surface is arranged on the carrier disc and the centrifugal pendulum has at least one stop means.

2. The centrifugal pendulum device according to claim 1, wherein the stop means is arranged on a radial inner side of the centrifugal pendulum.

3. The centrifugal pendulum device according to claim 2, wherein the stop means is part of a spacer.

4. The centrifugal pendulum device according to claim 3, wherein the centrifugal pendulum comprises two pendulum masses arranged on both sides of the carrier disc and the spacer is arranged on a side of one of the pendulum masses facing the carrier disc.

5. The centrifugal pendulum device according to claim 4, wherein the spacer is connected to the pendulum masses by a clip connection.

6. The centrifugal pendulum device according to claim 4, wherein the centrifugal pendulum comprises an additional mass arranged between the pendulum masses and the spacer is arranged between the additional mass and the pendulum masses.

7. The centrifugal pendulum device according to claim 4, wherein the spacer is L-shaped and has an axially extending stop lug.

8. The centrifugal pendulum device according to claim 7, wherein the stop lug engages around the pendulum masses on the radial inner side.

9. The centrifugal pendulum device according to claim 7, wherein a rubber coating is arranged on the stop lug.

10. The centrifugal pendulum device according to claim 4, wherein the spacer is arranged on both pendulum masses.

11. A centrifugal pendulum device for a drive train of a motor vehicle, the centrifugal pendulum device comprising: a carrier disc; at least one centrifugal pendulum arranged on the carrier disc and configured to move relative to the carrier disc along a predetermined pendulum path, wherein the centrifugal pendulum comprises first and second pendulum masses arranged on opposite sides of the carrier disc; at least one radial stop surface arranged on the carrier disc; and at least one spacer arranged on a side of the first or the second pendulum mass facing the carrier disc, wherein the spacer includes an axially extending stop lug engaged with a radial inner side of the respective first or second pendulum mass.

12. The centrifugal pendulum device according to claim 11, wherein the spacer is L-shaped.

13. The centrifugal pendulum device according to claim 11, wherein a rubber coating is arranged on the stop lug.

14. The centrifugal pendulum device according to claim 11, wherein the spacer is connected to the first or the second pendulum mass by a clip connection.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Exemplary embodiments of the disclosure are explained in more detail below with reference to the accompanying drawings. In the figures:

[0017] FIG. 1 shows a centrifugal pendulum device according to the prior art as a comparative example,

[0018] FIG. 2 shows a first exemplary embodiment of a centrifugal pendulum device according to the disclosure as a schematic diagram in a sectional view,

[0019] FIG. 3 shows a second exemplary embodiment of a centrifugal pendulum device according to the disclosure as a schematic diagram in a sectional view,

[0020] FIG. 4 shows a third exemplary embodiment of a centrifugal pendulum device according to the disclosure as a schematic diagram in a sectional view.

DETAILED DESCRIPTION

[0021] FIG. 1 shows an embodiment of a centrifugal pendulum device 1 in a plan view as a comparative example for understanding the disclosure. The centrifugal pendulum device 1 is substantially rotationally symmetrical with respect to an axis of rotation R. Here, the circumferential direction is understood to be a rotation about the axis of rotation R, the axial direction is understood to be the direction parallel to the axis of rotation R, and the radial direction is understood to be any direction perpendicular to the axis of rotation R. The centrifugal pendulum device 1 is arranged in the drive train of a motor vehicle between an internal combustion engine having a crankshaft and a disengageable vehicle clutch which is coupled to a transmission. The centrifugal pendulum device 1 comprises a carrier disc 2 which, in the installed position, is connected to a secondary flange, not shown, of a dual mass flywheel in the drive train of a motor vehicle, for example. The connection is made by a screw connection, for which a large number of bores 3 for receiving screws are arranged distributed over the circumference of the centrifugal pendulum device 1.

[0022] Multiple, in the present exemplary embodiment four, centrifugal pendulums 4 are distributed over the circumference of the centrifugal pendulum device 1. The centrifugal pendulums 4 each comprise a first or motor-side pendulum mass 5 and a second or transmission-side pendulum mass 6. The terms motor-side and transmission-side are used here solely to make it easier to distinguish and understand the device and the arrangement of the parts of the device. The first pendulum mass 5 and the second pendulum mass 6 are arranged on both sides of the carrier disc 2 and are firmly connected to one another. The first pendulum mass 5 and the second pendulum mass 6 are firmly connected to one another by multiple, in the present exemplary embodiment three, rivet bolts 7.

[0023] Both the first pendulum mass 5 and the second pendulum mass 6 have multiple holes drilled into them to accommodate the rivet bolts 7.

[0024] Pendulum rollers 9 are received in elongated holes 8 of the carrier disc 2. The pendulum rollers 9 each comprise a cylindrical central part which is provided with roller centering rims at both axial ends. The roller centering rims serve to fix the spherical rollers 9 in an axially form-fitting manner in the elongated holes 8. The roller ends of the pendulum rollers 9 that project axially beyond the respective roller centering rims each protrude into elongated holes 11 in the pendulum masses 5 and 6. The elongated holes 11, together with the elongated holes 8 and the pendulum rollers 9, enable a pendulum movement of the centrifugal pendulum 4 relative to the carrier disc 2. For this purpose, the roller paths for the pendulum rollers 9 are kidney-shaped and, together with the pendulum rollers 9 and the elongated holes 8, form a link guide for the centrifugal pendulum 4. The pendulum masses 5, 6 each have a radial inner side 12, a radial outer side 13 and two end faces 14.

[0025] The raceways of the pendulum rollers 9 with respect to the centrifugal pendulum flange 2 or the centrifugal pendulums 4 are designed in such a way that the centrifugal pendulums 4 can perform a pendulum movement of a so-called parallel pendulum (also known as 1.sup.st generation), or a so-called trapezoidal pendulum (2.sup.nd generation). At a maximum pendulum angle of the centrifugal pendulum 4 relative to the pendulum flange 2, the pendulum rollers 9 hit the ends of the elongated holes 8 and 11.

[0026] FIG. 2 shows an exemplary embodiment of a centrifugal pendulum device 1 according to the disclosure in a sectional view. Parts that are not essential for understanding the disclosure are not shown. As in the comparative example in FIG. 1, two pendulum masses 5, 6 that are firmly connected to one another are arranged on both sides of a pendulum flange and are mounted in a pendulum-like manner by means of pendulum rollers, not shown here.

[0027] On the radially inner side of the pendulum masses 5, 6 each of the radial stop surfaces 15, 16 are arranged on the pendulum flange. The stop surfaces 15, 16 have an L-shaped cross-section and are riveted, screwed or, in particular, welded to the pendulum flange. Alternatively, these can be worked out from the material of the pendulum flange 2, for example by punching or the like.

[0028] On the pendulum masses 5, 6 outer spacers 17 are arranged radially on the outer side. These are plastic clips which have a bolt part 18 and a head part 19. Each bolt part 18 is received by a bore 20 of one of the pendulum masses 5, 6. The head part 20 is spaced apart from the surface of the pendulum flange 2 and serves as a lubricant when the pendulum mass 5, 6 touches the pendulum flange 2. Inner spacers 21 are arranged radially on the inner side, which inner spacers likewise have a bolt part 22 which is received in a bore 23. The inner spacers 21 are extended radially inward and encompass the respective pendulum mass 5, 6 with a stop lug 24 on the radial inner side thereof. The stop lug 24 is provided with a rubber coating 25. The stop lug 24 and rubber coating 25 form a stop means 26 which strikes against the assigned stop surface 25, 16 when the pendulum mass 4 has a determined pendulum deflection. The determined pendulum swing is smaller than the maximum pendulum angle at which the pendulum rollers hit the ends of the elongated holes.

[0029] FIG. 3 shows an alternative embodiment in which the outer and inner spacers are combined to form a spacer 27. On the radial inside, the spacers 27 have the stop lug 24 and the rubber coating 25, which form the stop means 26.

[0030] FIG. 4 shows a further exemplary embodiment for centrifugal pendulums 4 in which an additional mass 28 consisting of multiple sheet metal layers is arranged between the pendulum masses 5, 6. The pendulum masses 5, 6 and the additional mass 28 are firmly connected to one another with rivets 29, 30. L-shaped spacers 31 are arranged between the additional mass 28 and the respective pendulum mass 5, 6, wherein the rivets 29, 30 protrude through bores 32, 33 in the spacer 31. On the radial inside, the spacers 31 have the stop lug 24 and the rubber coating 25, which form the stop means 26.

LIST OF REFERENCE NUMBERS

[0031] 1 Centrifugal pendulum device

[0032] 2 Carrier disc

[0033] 3 Bore

[0034] 4 Centrifugal pendulum

[0035] 5 Motor-side pendulum mass

[0036] 6 Transmission-side pendulum mass

[0037] 7 Rivet bolt

[0038] 8 Elongated hole

[0039] 9 Pendulum roller

[0040] 11 Elongated hole in pendulum mass

[0041] 12 Radial inner side of the pendulum mass

[0042] 13 Radial outer side of the pendulum mass

[0043] 14 End face of the pendulum mass

[0044] 15 Radial stop surface

[0045] 16 Radial stop surface

[0046] 17 Outer spacer

[0047] 18 Bolt part

[0048] 19 Head part

[0049] 20 Bore

[0050] 21 Inner spacer

[0051] 22 Bolt part

[0052] 23 Bore

[0053] 24 Stop lug

[0054] 25 Rubber coating

[0055] 26 Stop means

[0056] 27 Spacer

[0057] 28 Additional mass

[0058] 29 Rivet

[0059] 30 Rivet

[0060] 31 Spacer

[0061] 32 Bore

[0062] 33 Bore