TORSIONAL VIBRATION DAMPER AND HYDRODYNAMIC TORQUE CONVERTER COMPRISING SAME

Abstract

A torsional vibration damper and a hydrodynamic torque converter comprising same is disclosed. The torsional vibration damper has an input part which can be rotated about a rotational axis (d) and an output part. An intermediate flange is arranged against a respective spring device, which acts in a circumferential direction, between the input part and the output part, and the intermediate flange is made of two axially spaced interconnected lateral parts, axially between which the input part and the output part are received. In order to improve the loading of the spring devices, the loading of the spring devices by means of the intermediate flange is at least partly provided by loading means arranged between the lateral parts.

Claims

1. A torsional vibration damper comprising: an input part which can be rotated about a rotational axis (d) and an output part, an intermediate flange being arranged against a respective spring device, which acts in a circumferential direction, between the input part and the output part, and the intermediate flange being made of two axially spaced interconnected lateral parts, axially between which the input part and the output part are received, wherein a loading of the spring devices by the intermediate flange is at least partly provided by loading means arranged between the lateral parts.

2. The torsional vibration damper according to claim 1, wherein the loading means are additionally formed from at least one lateral part.

3. The torsional vibration damper according to claim 1, wherein the loading means are formed from spacer bolts at least partially connecting the lateral parts.

4. The torsional vibration damper according to claim 1, wherein the loading means are formed from sheet metal parts or rivets connected to at least one lateral part.

5. The torsional vibration damper according to claim 1, wherein spring devices are formed from linearly designed helical compression springs received in spring windows of the lateral parts.

6. The torsional vibration damper according to claim 5, wherein at least one spring device is formed from nested helical compression springs designed as inner and outer springs.

7. The torsional vibration damper according to claim 6, wherein at least the inner springs are loaded by the loading means arranged between the lateral parts.

8. The torsional vibration damper according to claim 5, wherein the loading means arranged between the lateral parts are adapted in the circumferential direction to end faces of the helical compression springs.

9. A hydrodynamic torque converter comprising: a torsional vibration damper, including an input part which can be rotated about a rotational axis (d) and an output part, an intermediate flange being arranged against a respective spring device, which acts in a circumferential direction, between the input part and the output part, and the intermediate flange being made of two axially spaced interconnected lateral parts, axially between which the input part and the output part are received, wherein a loading of the spring devices by the intermediate flange is at least partly provided by loading means arranged between the lateral parts, and wherein the torsional vibration damper is operatively arranged within a housing of the hydrodynamic torque converter between an output part of a converter bridging clutch arranged between the housing and an output hub of the hydrodynamic torque converter and the output hub, and the intermediate flange is connected to a turbine wheel driven by a pump wheel connected to the housing.

10. The hydrodynamic torque converter according to claim 9, wherein the input part of the torsional vibration damper and at least one lateral part are centered on the output hub in a limited rotatable manner and the output part is connected to the output hub in a rotationally fixed manner.

11. The hydrodynamic torque converter according to claim 9, wherein the loading means are additionally formed from at least one lateral part.

12. The hydrodynamic torque converter according to claim 9, wherein the loading means are formed from spacer bolts at least partially connecting the lateral parts.

13. The hydrodynamic torque converter according to claim 9, wherein the loading means are formed from sheet metal parts or rivets connected to at least one lateral part.

14. The hydrodynamic torque converter according to claim 9, wherein spring devices are formed from linearly designed helical compression springs received in spring windows of the lateral parts.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure is explained in more detail with reference to the exemplary embodiments shown in FIGS. 1 to 3. In the figures:

[0026] FIG. 1 shows the upper part of a torsional vibration damper arranged to be rotatable about a rotational axis, in section,

[0027] FIG. 2 shows the torsional vibration damper of FIG. 1 in partial view, and

[0028] FIG. 3 shows the upper part of a torsional vibration damper modified compared to the torsional vibration damper of FIGS. 1 and 2, in section.

DETAILED DESCRIPTION

[0029] FIG. 1 shows the upper part of the torsional vibration damper 1, which can be rotated about the rotational axis d, in section. The input part 2 is connected to the output-side plate carrier 3 of a converter bridging clutch of a hydrodynamic torque converter by means of the rivets 4 distributed over the circumference. The input part 2 is received in a rotatably centered manner on the output hub 5. The output part 6 is non-rotatably connected to the output hub 5. The input part 2 and output part 6 are designed as disk parts 7, 8 arranged parallel to one another. The disk part 7 is axially fixed and rotatably received by means of the locking washer 9 and the ring rim 10 of the output hub 5 and is centered on the output hub 5. The disk part 8 is axially pretensioned between the ring rim 10 and the thrust washer 11 and is held non-rotatably on the output hub 5 by means of a toothing, not shown.

[0030] The intermediate flange 12 is formed from the two axially spaced lateral parts 14, 15 connected to one another by means of the spacer bolts 13. The disk parts 7, 8 are axially received between the lateral parts 14, 15 of the intermediate flange 12. The lateral part 14 facing the plate carrier 3 is recessed radially on the inside in order to enable the connection of the plate carrier 3 to the input part 2.

[0031] The lateral parts 14, 15 form the pendulum mass carrier 16 of the centrifugal pendulum 17 and receive the pendulum masses 18, which are formed from, for example, riveted sheet metal disks, between them, distributed over the circumference. The pendulum masses 18 are suspended by means of pendulum bearings, not shown, on the pendulum mass carrier 16 in the centrifugal force field of the torsional vibration damper 1 rotating about the rotational axis d so that they can swing along a predetermined pendulum path.

[0032] Spring devices 19, 20 are effective between the input part 2, the intermediate flange 12 and the output part 6. The spring devices 19, 20 are arranged in series, i.e., when the input part 2 is rotated relative to the output part 6 about the rotational axis d, depending on the direction of the applied torque, that between the input part 2 and the intermediate flange 12 and that between the intermediate flange 12 and spring devices 19, 20 effectively arranged on the output part 6 are loaded in series.

[0033] The spring devices 19, 20 are formed from linear, nested helical compression springs 21, 22, 23, 24, which are arranged distributed over the circumference.

[0034] The thrust washer 11, made in particular of plastic and suspended in a rotationally fixed manner in the lateral part 15, limits the axial play of the intermediate flange 12. The intermediate flange 12 is rotatably received and centered on the output hub 5 by means of the lateral part 15. The helical compression springs 21, 22, 13, 24 are housed in the spring windows 25, 26 of the lateral parts 14, 15 in a captive manner and are supported radially on the outside.

[0035] The loading of the helical compression springs 21, 22, 23, 24 in the circumferential direction takes place in each case by means of loading means of the disk parts 7, 8 of the input part 2 and the output part 6, which cannot be seen from this sectional view, on one end face of the helical compression springs 21, 22, 23, 24 and on each opposite end face by means of loading means 27 of the intermediate flange 12.

[0036] Due to the axially necessary structure and the diameter of the helical compression springs 21, 23 designed as external springs, the spacer bolts 13 arranged between the lateral parts 14, 15 are arranged at the radial height of the helical compression springs 21, 22, 23, 24 and serve as loading means 27 of the intermediate flange 12 to increase the coverage of the cross-sections of the end faces of the helical compression springs 21, 22, 23, 24, for example, to greater than or equal to 50%, and thus to provide sufficient loading thereof. In the exemplary embodiment shown, the radial walls of the spring windows 25, 26 load the outer helical compression springs 21, 23 and only overlap the inner helical compression springs 22, 24. The lateral part 14 is cranked in order to increase the overlap in the area of the cross-section of the helical compression springs 21, 23. To further improve the cover, the spacer bolts 13 are also provided, which load part of the outer helical compression springs 21, 23 and a large part of the inner helical compression springs 22, 24. The diameter D of the spacer bolts 13 is expanded in such a way that it is essentially identical to the radial walls of the spring windows 25, 26. In this way, a planar loading of the helical compression springs 21, 22, 23, 24, in particular the inner helical compression springs 22, 24, is achieved without additional parts outlay.

[0037] FIG. 2 shows the torsional vibration damper 1 of FIG. 1 in a partial view with the front lateral part 14 removed (FIG. 1) and the input-side disk part 7 removed (FIG. 1). The arrangement of the pendulum masses 18 of the centrifugal pendulum 17, which is distributed over the circumference, radially outside the spring devices 19, 20 with the nested helical compression springs 21, 22, 23, 24 can be clearly seen from this illustration. The pendulum masses 18 are received on the intermediate flange 12 in a pendulous manner by means of the pendulum bearings 28.

[0038] The helical compression springs 21, 22, 23, 24 are received in the spring windows 26 and are loaded, on the one hand, by the loading means 29 of the disk part 8 of the output part 6 and the non-visible loading means of the disk part 8 of the input part and, on the other hand, by the loading means 27 of the intermediate flange 12. The loading means 27 are formed from the radial walls 30 of the lateral parts 14, 15 (FIG. 1) and the spacer bolts 13.

[0039] FIG. 3 shows the upper part of the torsional vibration damper 1a arranged about the rotational axis d in section. In contrast to the torsional vibration damper 1 of FIGS. 1 and 2, the loading means 27a of the intermediate flange 12a, in addition to the radial walls 30a of the spring windows 25a, 26a of the lateral parts 14a, 15a forming the intermediate flange 12a, are additionally in the circumferential direction between the spring windows 25a, 26a at radial height of the helical compression springs 21a, 22a, 23a, 24a formed in the lateral part 15a inserted rivets 31a. The lateral part 14a cranked in the area of the wall 30a loads the inner and outer helical compression springs 21a, 22a, 23a, 24a. The lateral part 15a loads the outer helical compression springs 21a. 23a. The rivets 31a introduced into the lateral part 15a each load the inner helical compression springs 22a, 24a. The position of the spacer bolts, not shown, connecting the lateral parts 14a, 15a can be selected outside the diameter of the helical compression springs 21a, 22a, 23a, 24a.

LIST OF REFERENCE NUMBERS

[0040] 1 Torsional vibration damper [0041] 1a Torsional vibration damper [0042] 2 Input part [0043] 3 Plate carrier [0044] 4 Rivet [0045] 5 Output hub [0046] 6 Output part [0047] 7 Disk part [0048] 8 Disk part [0049] 9 Locking washer [0050] 10 Ring rim [0051] 11 Thrust washer [0052] 12 Intermediate flange [0053] 12a Intermediate flange [0054] 13 Spacer bolt [0055] 14 Lateral part [0056] 14a Lateral part [0057] 15 Lateral part [0058] 15a Lateral part [0059] 16 Pendulum mass carrier [0060] 17 Centrifugal pendulum [0061] 18 Pendulum mass [0062] 19 Spring device [0063] 20 Spring device [0064] 21 Helical compression spring [0065] 21a Helical compression spring [0066] 22 Helical compression spring [0067] 22a Helical compression spring [0068] 23 Helical compression spring [0069] 23a Helical compression spring [0070] 24 Helical compression spring [0071] 24a Helical compression spring [0072] 25 Spring window [0073] 25a Spring window [0074] 26 Spring window [0075] 26a Spring window [0076] 27 Loading means [0077] 27a Loading means [0078] 28 Pendulum bearing [0079] 29 Loading means [0080] 30 Wall [0081] 30a Wall [0082] 31a Rivet [0083] D Diameter [0084] d Rotational axis