TORSIONAL VIBRATION DAMPER

Abstract

A torsional vibration damper includes a common axis of rotation extending along an axial direction, an input part, an output part, rotatable relative to the input part in a limited manner with torque transmission, and a ramp system. The ramp system includes an axially displaceable component, a plurality of rolling elements for converting rotation of the input part relative to the output part into an axial shifting of the axially displaceable component, and a plurality of energy storage elements. The plurality of energy storage elements are arranged distributed along a circumferential direction, extend along the axial direction, and are elastically deformable in the axial direction.

Claims

1.-10. (canceled)

11. A torsional vibration damper comprising: a common axis of rotation extending along an axial direction; an input part; an output part, rotatable relative to the input part in a limited manner with torque transmission; a ramp system comprising: an axially displaceable component; a plurality of rolling elements for converting rotation of the input part relative to the output part into an axial shifting of the axially displaceable component; and a plurality of energy storage elements: arranged distributed along a circumferential direction; extending along the axial direction; and elastically deformable in the axial direction.

12. The torsional vibration damper of claim 11 wherein the plurality of rolling elements are tapered rollers or conical spherical rollers.

13. The torsional vibration damper of claim 11 wherein the energy storage elements are compression springs.

14. The torsional vibration damper of claim 11 wherein the ramp system comprises: a first ramp system comprising a first group of the plurality of rolling elements arranged on a first diameter; and a second ramp system comprising a second group of the plurality of rolling elements arranged on a second diameter, different than the first diameter.

15. The torsional vibration damper of claim 14 wherein each one of the first group is shaped differently than each one of the second group.

16. The torsional vibration damper of claim 14 wherein all of the first group and the second group are identically shaped.

17. The torsional vibration damper of claim 14 wherein: the axially displaceable component comprises a first disk; the first ramp system extends along the circumferential direction on the input part and on the first disk; the first group is arranged between the input part and the first disk; the second ramp system extends along the circumferential direction on the output part and on the first disk; and the second group is arranged between the output part and the first disk.

18. The torsional vibration damper of claim 17 wherein: the axially displaceable component comprises a second disk; the first group comprises: a first group first row arranged between a first axial side of the input part and the first disk; and a first group second row arranged between the first axial side of the output part and the first disk; and the second group comprises: a second group first row arranged between a second axial side of the input part, opposite the first axial side, and the second disk; and a second group second row arranged between the second axial side of the output part and the second disk.

19. The torsional vibration damper of claim 18 further comprising a connecting element, wherein: the second disk is axially fixed at a first end of the connecting element; the connecting element extends from the first end along the axial direction through the first disk to a second end; and the plurality of energy storage elements is arranged between the second end and the first disk.

20. The torsional vibration damper of claim 19 further comprising a third disk, wherein: the connecting element comprises a plurality of connecting elements distributed along the circumferential direction and fixed to the third disk at the second end; and the plurality of energy storage elements are axially supported on the third disk.

21. The torsional vibration damper of claim 11 wherein: the plurality of energy storage elements can be shifted along the axial direction with respect to the input part and the output part; or the plurality of energy storage elements can be rotated along the circumferential direction with respect to the input part and the output part.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Both the present disclosure and the technical field are explained in more detail below with reference to the accompanying figures. It should be noted that the disclosure is not intended to be limited by the exemplary embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the substantive matter outlined in the figures and to combine them with other components and knowledge from the present description and/or figures. In particular, it should be noted that the figures and in particular the proportions shown are only schematic. In the figures:

[0059] FIG. 1 shows a drive train with an internal combustion engine, a generator and an electric machine, wherein the possible positions for the arrangement of a torsional vibration damper are shown;

[0060] FIG. 2 shows a torsional vibration damper in a view along the axis of rotation;

[0061] FIG. 3 shows the torsional vibration damper according to FIG. 2 in a side view in section along the line III-III according to FIG. 2;

[0062] FIG. 4 shows the torsional vibration damper according to FIGS. 2 and 3 in a view along the axis of rotation, in section along the line IV-IV according to FIG. 5;

[0063] FIG. 5 shows the torsional vibration damper according to FIGS. 2 to 4 in a side view in section along the line V-V according to FIG. 4;

[0064] FIG. 6 shows the torsional vibration damper according to FIGS. 2 through 5 in a side view in section along the line VI-VI according to FIG. 4;

[0065] FIG. 7 shows a detail VII according to FIG. 6 of the torsional vibration damper according to FIGS. 2 through 6;

[0066] FIG. 8 shows a detail VIII according to FIG. 3 of the torsional vibration damper according to FIGS. 2 through 6;

[0067] FIG. 9 shows a spherical roller bearing for the torsional vibration damper in a side view in section;

[0068] FIG. 10 shows the spherical roller bearing according to FIG. 9 in a pivoted arrangement; and

[0069] FIG. 11 shows a tapered roller bearing for the torsional vibration damper in a side view in section.

DETAILED DESCRIPTION

[0070] FIG. 1 shows a drive train having an internal combustion engine 30, a generator 31, and an electrical machine 32, wherein the possible positions for the arrangement of a torsional vibration damper 1 are shown. In the case of the electrical machine 32, the torsional vibration damper 1 can be arranged within the rotor 33.

[0071] FIG. 2 shows a torsional vibration damper 1 in a view along the axis of rotation 5. FIG. 3 shows the torsional vibration damper 1 according to FIG. 2 in a side view in section along the line III-III according to FIG. 2. FIG. 4 shows the torsional vibration damper 1 according to FIGS. 2 and 3 in a view along the axis of rotation 5, in section along the line IV-IV according to FIG. 5. FIG. 5 shows the torsional vibration damper 1 according to FIGS. 2 through 4 in a side view in section along the line V-V according to FIG. 4. FIG. 6 shows the torsional vibration damper 1 according to FIGS. 2 through 5 in a side view in section along the line VI-VI according to FIG. 4. FIG. 7 shows a detail VII according to FIG. 6 of the torsional vibration damper 1 according to FIGS. 2 to 6. FIG. 8 shows a detail VIII according to FIG. 3 of the torsional vibration damper 1 according to FIGS. 2 to 6. FIGS. 2 to 8 are described together below.

[0072] The torsional vibration damper includes an input part 2 and an output part 3 with a common axis of rotation 5 extending along an axial direction 4. The input part 2 and the output part 3 can be rotated to a limited extent relative to one another along a circumferential direction 6 when a torque is transmitted (e.g., introduction via the input part 2 to the output part 3 and forwarding via the output part 3; or vice versa). The torsional vibration damper 1 has two ramp systems 7, 8 with rolling elements 9, through which a relative rotation 10 of the input part 2 and output part 3 in a shifting 11 along the axial direction 4 of at least one component 12 (the first disk 18, the second disk 23, of the connecting element 25, the third disk 27) of the torsional vibration damper 1 can be implemented. The torsional vibration damper 1 has a plurality of energy storage elements 13, wherein all energy storage elements 13 of the torsional vibration damper 1 are evenly distributed along the circumferential direction 6 and arranged to be spaced apart from one another, and each extends along the axial direction 4 and can be elastically deformable in the axial direction 4.

[0073] The input part 2 and the output part 3 are arranged to be axially fixed to one another, so that the shifting 11 is transmitted to the energy storage elements 13 via another component 12.

[0074] The ramp systems 7, 8 have tapered rollers as rolling elements 9. The energy storage elements 13 are designed as compression springs.

[0075] A first group 14 of rolling elements 9 is arranged on a first diameter 15 in a first ramp system 7 and a second group 16 of rolling elements 9 is arranged on a second diameter 17 (deviating from the first diameter 15) in a second ramp system 8.

[0076] The first group 14 and the second group 16 have rolling elements 9 that differ from one another.

[0077] The first ramp system 7 is formed by the input part 2 and a first disk 18 extending along the circumferential direction 6 around the axis of rotation 5, wherein the first group 14 is arranged between the input part 2 and the first disk 18. The second ramp system 8 is formed by the output part 3 and the first disk 18, wherein the second group 16 is arranged between the output part 3 and the first disk 18. The first disk 18 is one of the components 12 that can be shifted along the axial direction 4.

[0078] Each ramp system 7, 8 is formed by first ramps 28 and second ramps 29, wherein a rolling element 9 is arranged between a first ramp 28 and a second ramp 29, which form a pair of ramps. In the case of the first group 14, a plurality of first ramps 28 are formed on the input part 2. The second ramps 29 of the first group 14 are formed on the first disk 18. In the second group 16, a plurality of first ramps 28 are formed on the output part 3. The second ramps 29 of the second group 16 are formed on the first disk 18.

[0079] Each group 14, 16 includes two rows 19, 20 of rolling elements 9, wherein a first row 19 of rolling elements 9 cooperates with the first disk 18 on a first side 21 of the input part 2 and of the output part 3. A second row 20 of rolling elements 9 cooperate on a second side 22 opposite the first side 21 along the axial direction 4 with a second disk 23 extending along the circumferential direction 6 about the axis of rotation 5. The second disk 23 is also a component 12 that can be shifted along the axial direction 4.

[0080] The input part 2 has first ramps 28 for each row 19, 20 of the first group 14. The first ramps 28 are formed on the first side 21 and on the second side 22 of the input part 2.

[0081] In addition to the first disk 18 (for the first row 19 and the first group 14), the second disk 23 also has second ramps 29 for the second row 20 and the first group 14.

[0082] The output part 3 has first ramps 28 for each row 19, 20 of the second group 16. The first ramps 28 are formed on the first side 21 and on the second side 22 of the output part 3.

[0083] In addition to the first disk 18 for the first row 19 and the second group 16, the second disk 23 for the second row 20 and the second group 16 also has second ramps 29.

[0084] The second disk 23 is arranged to be axially fixed at a first end 24 of a connecting element 25. The connecting element 25 extends from the first end 24 along the axial direction 4 through the first disk 18 to a second end 26. A third disk 27 is arranged to be axially fixed at the second end 26. The plurality of energy storage elements 13 are arranged along the axial direction 4 between the second end 26 or the third disk 27 and the first disk 18.

[0085] When a torque gradient occurs, on the one hand the first disk 18 is shifted along the axial direction 4 (along a first axial direction). At the same time, the second disk 23 is shifted along the axial direction 4 (along a second axial direction opposite to the first axial direction). Via the second disk 23, the first end 24 and the second end 26 of the connecting element 25 are shifted along the axial direction 4 (along the second axial direction), so that the energy storage elements 13 on both sides, i.e., through the first disk 18 and over the second end 26 or the third disk 27 are compressed.

[0086] The plurality of energy storage elements 13 and the plurality of connecting elements 25 can be shifted along the axial direction 4 with respect to the input part 2 and the output part 3 (i.e., not axially fixed with respect to the input part 2 and the output part 3) and along the circumferential direction 6 with respect to the input part 2 and the output part 3 rotatable (i.e., not rotationally fixed with respect to the input part 2 and the output part 3).

[0087] The connecting element 25 is connected to the second disk 23 via a rivet connection. The first end 24 forms a rivet connection with the second disk 23.

[0088] The connecting element 25 serves as a guide for the energy storage element 13. The connecting element 25 extends along the axial direction 4 through the energy storage element 13.

[0089] The torsional vibration damper 1 is arranged inside a housing 34. It can be arranged separately from other components via the housing 34. Seals 35 are provided, via which the torsional vibration damper 1 is arranged in a fluid-tight manner within the housing 34.

[0090] A separate cage 36 is provided for each group 14, 16 and each row 19, 20 of rolling elements 9.

[0091] FIG. 9 shows a spherical roller bearing for the torsional vibration damper 1 in a side view in section. FIG. 10 shows the spherical roller bearing according to FIG. 9 in a pivoted arrangement, wherein the axes of rotation 5 are tilted relative to one another. FIGS. 9 and 10 are described together below.

[0092] The rolling elements 9 are designed as conical spherical rollers, the lateral surfaces 37 of which are arranged on a common circular radius 38.

[0093] FIG. 11 shows a tapered roller bearing for the torsional vibration damper 1 in a side view in section. The tip 39 of a cone, formed by a lateral surface 37, of the rolling element 9 designed as a conical roller is arranged on the axis of rotation 5.

REFERENCE NUMERALS

[0094] 1 Torsional vibration damper [0095] 2 Input part [0096] 3 Output part [0097] 4 Axial direction [0098] 5 Axis of rotation [0099] 6 Circumferential direction [0100] 7 First ramp system [0101] 8 Second ramp system [0102] 9 Rolling element [0103] 10 Rotation [0104] 11 Shifting [0105] 12 Component [0106] 13 Energy storage element [0107] 14 First group [0108] 15 First diameter [0109] 16 Second group [0110] 17 Second diameter [0111] 18 First disk [0112] 19 First row [0113] 20 Second row [0114] 21 First side [0115] 22 Second side [0116] 23 Second disk [0117] 74 First end [0118] 25 Connecting element [0119] 26 Second end [0120] 27 Third disk [0121] 28 First ramp [0122] 29 Second ramp [0123] 30 internal combustion engine [0124] 31 Generator [0125] 32 Electric machine [0126] 33 Rotor [0127] 34 Housing [0128] 35 Seal [0129] 36 Cage [0130] 37 Lateral surface [0131] 38 Circle radius [0132] 39 Tip