TORSIONAL VIBRATION DAMPER

Abstract

A torsional vibration damper, in particular for a drive train of a motor vehicle having a dual clutch transmission, includes an input part mounted rotatably about a rotation axis, and an output part rotatable in relation to the input part about the rotation axis to a limited extent against the action of a spring device and which has an output hub. A rolling bearing is provided between the input part and the output part, the output hub is divided into a ring part, which contains an output-side bearing seat, and a hub part, which contains internal teeth.

Claims

1. A torsional vibration damper comprising: an input part rotatably about an axis of rotation; an output rotatable in relation to the input part about the axis of rotation to a limited extent against an action of a spring device; and an output hub, wherein a rolling bearing is provided between the input part and the output part, wherein the output hub is designed as divided into a ring part containing an output-side bearing seat and a hub part containing an internal toothing.

2. The torsional vibration damper according to claim 1, wherein the ring part and the hub part are riveted to each other.

3. The torsional vibration damper according to claim 2, wherein a partial circle of rivets arranged distributed across a circumference is arranged in an area of a radius of a partial circle of fastening openings of the input part, wherein the rivets are provided between the fastening openings in a circumferential direction.

4. The torsional vibration damper according to claim 1, wherein an outer ring of the rolling bearing is accommodated on the bearing seat of the ring part and is supported axially on the hub part immediately radially outside of the internal toothing.

5. The torsional vibration damper according to claim 1, wherein the ring part is produced from sheet metal and the bearing seat is introduced using a tool or machining.

6. The torsional vibration damper according to claim 1, wherein the hub part is produced from sheet metal.

7. The torsional vibration damper according to claim 6, wherein the internal toothing is produced by broaching or using a tool.

8. The torsional vibration damper according to claim 1, wherein the ring part and the hub part are connected to one another centered on one another.

9. The torsional vibration damper according to claim 1, wherein an inner ring of the rolling bearing is accommodated on a bearing seat of a bearing dome of the input part.

10. The torsional vibration damper according to claim 1, wherein a ring mass and/or centrifugal force pendulum is arranged on the output part.

11. A torsional vibration damper, comprising: an input part mounted rotatably about an axis of rotation; an output part rotatable relative to the input part about the axis of rotation; a rolling bearing disposed between the input part and the output part; and an output hub including a ring part having an output-side bearing seat and a hub part, wherein an outer ring of the rolling bearing is arranged on the bearing seat of the ring part and is supported axially on the hub part.

12. The torsional vibration damper according to claim 11, wherein the ring part and the hub part are connected to each other radially outside of the rolling bearing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure is explained in more detail with reference to the exemplary embodiment shown in FIGS. 1 and 2. In the figures:

[0020] FIG. 1 shows a part of a torsional vibration damper arranged about an axis of rotation in a cross-sectional view

[0021] and

[0022] FIG. 2 shows a detail of the torsional vibration damper from FIG. 1.

DETAILED DESCRIPTION

[0023] FIG. 1 shows the upper part of torsional vibration damper 1, arranged rotatably about the axis of rotation d in a cross-sectional view, with input part 2 and output part 3 arranged to be relatively rotatable about the axis of rotation d against a spring device. The upper part of torsional vibration damper 1 with the spring device, optionally a ring mass and/or a centrifugal force pendulum, corresponds to the specified prior art.

[0024] Input part 2 contains drive plate 4, reinforcement disc 5, bearing dome 6, and axially elastic drive plates 7 layered on one another, which are connected to each other by means of rivets 8 arranged distributed across the circumference. Drive plates 7 are axially elastically connected, for example, to an annular chamber for the disc parts forming the spring device for radially outward isolation of axial, wobble, and/or slide vibration, said disc parts forming a primary flywheel mass with other components, for example, a starter ring gear, if necessary ring masses and the like. Instead of drive plates 4, 7, a disc part, which is substantially axially rigid, may be provided, which forms an annular chamber with a cover part.

[0025] Fastening openings, not visible in this depiction, are provided distributed across the circumference in input part 2 and offset across the circumference at the radial height of rivets 8. Torsional vibration damper 1 is screwed to a crankshaft of an internal combustion engine by means of screws through these fastening openings.

[0026] Output part 3 has output hub 9 and flange part 10 biasing the spring device on the output side. Output hub 9 and flange part 10 are connected to each other by means of main rivet 11.

[0027] Input part 2 and output part 3 are rotatable relative to one another about axis of rotation d and are mounted on one another against the action of the spring device. For this purpose, rolling bearing 12, designed here as a grooved ball bearing, is arranged between input part 2 and output part 3. Bearing dome 6 has bearing seat 13 on which inner ring 14 of rolling bearing 12 is pressed.

[0028] Output hub 9 is designed as two parts and has hub part 15 and ring part 16. Hub part 15 has internal toothing 17 and is produced from sheet metal by means of a stamping/shaping method. In the exemplary embodiment shown, the internal toothing is broached. Alternatively, hub part 15 may be designed with a pushed-in internal toothing, for example, using a tool.

[0029] Ring part 16 is produced from sheet metal using a tool and has an L-shaped cross section with legs 18, 19. Radial leg 18 is riveted to hub part 15 by means of rivets 20 arranged distributed across the circumference. Rivets 20 are arranged in the flange part substantially at the radial height of rivets 8 and the fastening openings and offset in the circumferential direction with respect to the fastening openings.

[0030] Axial leg 19 contains bearing seat 21, designed using tools, on which outer ring 22 of rolling bearing 12 is pressed.

[0031] FIG. 2 shows a detail of torsional vibration damper 1 from FIG. 1 in the area of rolling bearing 12. Divided output hub 9 is joined, in that ring part 16 is held on hub part 15, centered about axis of rotation d, and riveted to hub part 15 by means of rivet 20.

[0032] After the riveting of ring part 16 to hub part 15, rolling bearing 12 is pressed radially outside of inner toothing 17 axially against contact surface 23 of hub part 15 with its outer ring 22 on bearing seat 21 of ring part 16.

[0033] During the insertion of the subassembly of output part 3 into the still open annular chamber of input part 2, inner ring 14 of rolling bearing 12 is pressed through inner toothing 17 onto bearing seat 13 of bearing dome 6. The annular chamber is subsequently tightly sealed, for example, welded to a cover part.

LIST OF REFERENCE NUMBERS

[0034] 1 Torsional vibration damper [0035] 2 Input part [0036] 3 Output part [0037] 4 Drive plate [0038] 5 Reinforcing disc [0039] 6 Bearing dome [0040] 7 Drive plate [0041] 8 Rivet [0042] 9 Output hub [0043] 10 Flange part [0044] 11 Main rivet [0045] 12 Rolling bearing [0046] 13 Bearing seat [0047] 14 Inner ring [0048] 15 Hub part [0049] 16 Ring part [0050] 17 Internal toothing [0051] 18 Leg [0052] 19 Leg [0053] 20 Rivet [0054] 21 Bearing seat [0055] 22 Outer ring [0056] 23 Contact surface [0057] d Axis of rotation