DE102021106477A1 - torsional vibration damper - Google Patents

Abstract

The invention relates to a torsional vibration damper (1) with an input part (2) and an output part (3), the input part (2) being rotatable relative to the output part (3) counter to the restoring force of a damping device (4), the output part ( 3) has a hub (11) with a first toothing (12) with which a shaft (13) can engage with a second toothing (14), a membrane element (16) being provided which is connected to the output part (3 ) is non-rotatably connected and is supported radially on the outside axially on the input part (2) or on a component non-rotatably connected thereto and which is supported radially on the inside axially on the shaft (13).

Description

The invention relates to a torsional vibration damper, in particular for a motor vehicle.

Various designs of torsional vibration dampers have become known in the prior art, in particular for the drive train of motor vehicles. Such torsional vibration dampers have, for example, a spring damper device and optionally a centrifugal pendulum device in order to dampen the torques to be transmitted with regard to torque non-uniformities. Such torsional vibration dampers have become known, for example, as dual-mass flywheels, clutch dampers, double clutch dampers, etc. If a hub is used as the output part, into which a downstream shaft is inserted via a gearing, gearing rattling can occur in unfavorable operating situations because the gearing of the hub hits against the gearing of the shaft during torque fluctuations. This leads to a noise that is considered undesirable and should therefore be avoided.

It is the object of the present invention to create a torsional vibration damper which is improved in relation to the prior art with regard to unintentional noises, in which case the installation space of the torsional vibration damper must not be increased insignificantly.

The object of the torsional vibration damper is achieved with the features of claim 1.

One embodiment of the invention relates to a torsional vibration damper with an input part and with an output part, the input part being rotatable relative to the output part against the restoring force of a damping device, the output part having a hub with a first toothing, with which a shaft with a second toothing in Intervention can occur, wherein a membrane element is provided, which is rotatably connected to the output part and is supported radially outside axially on the input part or a component rotatably connected thereto and which is supported radially inside axially on the shaft. As a result, the diaphragm member is used not only to delimit the space within the input part but also to impart friction between the output part and the downstream shaft so that any gear rattling between the first gear and the second gear can be avoided.

In a further exemplary embodiment, it is also advantageous if the damper device has a flange on the output side, which is connected in a torque-proof manner to the output part. This achieves a compact design. The damper device can have a spring damper device and optionally a centrifugal pendulum device, so that the flange on the output side can be part of this spring damper device and the optional centrifugal pendulum device, which also saves installation space.

In a further exemplary embodiment, it is also advantageous if the output part has a first disc element which carries the hub radially on the inside. In this way, the hub can be coupled to the damper device in a simple and space-saving manner, because the first disc element requires only little installation space due to its flat contour. The hub can be designed in one piece with the disk element or can be connected to it, for example by welding, soldering, riveting, screwing or caulking.

It is also advantageous if the first disk element and the flange are arranged axially adjacent to one another and are connected to one another in a rotationally fixed manner by means of at least one rivet element, such as being riveted in particular. This also achieves a space-saving design.

It is also particularly advantageous if the membrane element is non-rotatably connected to the first disk element and/or the flange, in particular riveted, with the membrane element being arranged adjacent to the first disk element on a side facing away from the flange element, or that the membrane element is arranged axially between the first disk element and the flange element is arranged. This achieves a defined arrangement of the membrane element, while at the same time contact with the input part or the component connected thereto in a rotationally fixed manner and with the shaft can be achieved.

It is also advantageous if the membrane element is supported on the input part or a component connected thereto in a torque-proof manner with the interposition of a first ring element and/or that the membrane element is supported radially inward axially on the shaft with the interposition of a second ring element. This achieves a defined friction, which is defined by the appropriate choice of material pairing and the contact pressure. By providing the ring elements, the material of the respective ring element can be suitably selected in order to generate a defined friction with the contact pressure provided.

It is particularly advantageous if the first ring element and/or the second ring element is/are made of a plastic material and/or is/are used as a friction ring. The material can preferably be a polyamide, polypropylene, Teflon, etc.

It can also be advantageous if the membrane element consists of metal, in particular sheet metal and/or spring steel. As a result, the membrane element can be designed to be resilient, so that it can permanently apply a defined contact pressure over its service life in order to achieve the intended friction.

It is also expedient if the membrane element has a centrally arranged attachment area, in which lead-through openings for rivet elements or other attachment means are provided, and conically cupped cup spring-like ring areas being provided radially on the inside and radially on the outside. This creates a membrane element with two areas that act like a plate spring, which saves space and integrates two functions into one component.

It is also expedient if the potted ring area formed radially on the inside has bores, in particular for screws for screwing the torsional vibration damper. Thus, on the one hand, screwing is permitted after the membrane element has been provided, and on the other hand, weight is also saved.

The present invention is explained in more detail below using preferred exemplary embodiments in conjunction with the associated figures.

• 1 eine schematische Halbschnittdarstellung eines ersten Ausführungsbeispiels eines erfindungsgemäßen Drehschwingungsdämpfers,
• 2 eine schematische Darstellung einer Membran des Drehschwingungsdämpfers nach 1,
• 3 eine Teilschnittdarstellung der Membran nach 2, und
• 4 eine schematische Halbschnittdarstellung eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Drehschwingungsdämpfers.

show:

• 1 a schematic half-sectional view of a first embodiment of a torsional vibration damper according to the invention,
• 2 a schematic representation of a membrane of the torsional vibration damper 1 ,
• 3 a partial sectional view of the membrane 2 , and
• 4 a schematic half-sectional view of a second embodiment of a torsional vibration damper according to the invention.

the 1 shows a first exemplary embodiment of a torsional vibration damper 1 according to the invention, which can be rotated in relation to the axis xx, in a schematic half-sectional illustration.

The torsional vibration damper 1 according to the invention has an input part 2 and an output part 3 . The input part 2 can be rotated relative to the output part 3 against the restoring force of a damping device 4 .

In the exemplary embodiment shown, the damper device 4 is designed, for example, as a spring damper device 5 with a centrifugal pendulum device 6 . The spring damper device 5 has spring elements 7 which are supported on the one hand on the input part 2 in the circumferential direction and on which on the other hand a flange 8 is supported in the circumferential direction in order to transmit a torque. The centrifugal pendulum device 6 has pendulum masses 9 which are displaceably guided on the flange 8 . Alternatively, only one spring damper device 5 or only one centrifugal pendulum device 6 or an alternative or another damper device can also be provided, such as a friction damper device etc.

The flange 8 is connected in a rotationally fixed manner to the output part 3 radially on the inside.

The output part has a first disk element 10 and a hub 11 arranged radially on the inside, which are designed to be connected to one another or are designed in one piece. The output part 3 with its first disk element 10 thus carries the hub 11 radially on the inside.

The first disk element 10 and the flange 8 are arranged axially adjacent to one another. An overlapping of flange 8 and first disc element 10 is provided in a radial area. It can also be seen here that the flange 8 and the first disk element 10 are connected to one another in a rotationally fixed manner by means of at least one rivet element 15 , for example riveted.

According to 1 the output part 3 has a hub 11 with a first toothing 12 . The teeth 12 are designed as internal teeth.

Furthermore, a shaft 13 downstream of the torsional vibration damper 1 can be seen, which carries a second toothing 14 which is in torque-transmitting engagement with the first toothing 12 of the hub 11 . For this purpose, the shaft 13 is inserted with its second toothing 14 into the hub 11 with the first toothing 12 .

Furthermore, a membrane element 16 is provided, which is non-rotatably connected to the output part 3, in particular to the first disc element 10, and is non-rotatably connected radially outward axially to the input part 2 or one thereto NEN component is supported and which is supported axially on the shaft 13 radially on the inside.

The membrane element 16 is a disk-like element, which is designed with a cupped shape radially on the inside and radially on the outside and is designed and acts in the manner of a plate spring. As a result, the membrane element 16 can be supported both radially on the inside and radially on the outside under a predefined prestress on the input part 2 or on a component connected thereto in a rotationally fixed manner and on the shaft 13 . The membrane element 16 is preferably made of metal, in particular sheet metal and/or spring steel.

According to 1 the membrane element 16 is supported on the input part 2 or on a component connected thereto in a rotationally fixed manner with the interposition of a first ring element 17 and/or the membrane element 16 is supported radially inward axially on the shaft 13 with the interposition of a second ring element 18.

It is optionally preferred that the first ring element 17 and/or the second ring element 18 is/are made of a plastic material and/or serves/serves as a friction ring. The first ring element 17 and/or the second ring element 18 is preferably made of polyamide, polypropylene, Teflon, etc.

The membrane element 16 is non-rotatably connected to the first disk element 10 and/or the flange 8, in particular riveted, see the rivet elements 15. The membrane element 16 is arranged adjacent to the first disk element 10 on a side facing away from the flange element 8.

In an alternative design according to 4 the membrane element 16 is arranged axially between the first disk element 10 and the flange element 8 . the 4 otherwise shows an embodiment that corresponds to the embodiment of FIG 1 corresponds, so that reference is made to the relevant description.

According to the 2 and 3 the membrane element 16 is designed like a ring disk and has a centrally arranged fastening region 19 in which passage openings 20 for rivet elements 15 or other fastening means are provided. On both sides of the fastening area 19, ie radially on the inside and radially on the outside, there are conically potted ring areas 21, 22 designed like a plate spring.

The ring area 21 arranged radially on the outside is formed as a closed ring area 21 which forms a closed wall. As a result, a spatial area 25 can be sealed off by means of the membrane element 16, which is formed by the input part 2 and the disc element 26 and in which the spring elements 7 of the spring damper device 5 are accommodated.

The radially inner potted ring area 22 has bores 23, in particular for screws 24 for screwing the torsional vibration damper 1, for example on a crankshaft of an internal combustion engine or on a shaft of an electric motor or otherwise.

Reference List

1

torsional vibration damper

2

input part

3

output part

4

damper device

5

spring damper device

6

centrifugal pendulum device

7

spring element

8th

flange

9

pendulum mass

10

first disk element

11

hub

12

first gearing

13

Wave

14

second toothing

15

rivet element

16

membrane element

17

first ring element

18

second ring element

19

mounting area

20

feedthrough opening

21

ring area

22

ring area

23

drilling

24

screw

25

space area

26

disk element

Claims (10)

Torsional vibration damper (1) with an input part (2) and with an output part (3), the input part (2) counteracting the restoring force of a damping device (4) relative to the off gear part (3) can be rotated, the output part (3) having a hub (11) with a first toothing (12) with which a shaft (13) with a second toothing (14) can engage, with a membrane element ( 16) is provided, which is non-rotatably connected to the output part (3) and is supported radially on the outside axially on the input part (2) or on a component non-rotatably connected thereto and which is supported radially on the inside axially on the shaft (13). Torsional vibration damper (1). claim 1 , characterized in that the damping device (4) has an output-side flange (8) which is non-rotatably connected to the output part (3). Torsional vibration damper (1). claim 1 or 2 , characterized in that the output part (3) has a first disc element (10) which carries the hub (11) radially on the inside. Torsional vibration damper (1). claim 1 , 2 or 3 , characterized in that the first disk element (10) and the flange (8) are arranged axially adjacent to one another and are connected to one another in a rotationally fixed manner by means of at least one rivet element (15), such as being riveted in particular. Torsional vibration damper (1). claim 4 , characterized in that the membrane element (16) is non-rotatably connected to the first disc element (10) and/or the flange (8), in particular is riveted, the membrane element (16) adjacent to the first disc element (10) on one of the side facing away from the flange element (8) or that the membrane element (16) is arranged axially between the first disc element (10) and the flange element (8). Torsional vibration damper (1). claim 1 , characterized in that the membrane element (16) is supported on the input part (2) or on a component connected to it in a rotationally fixed manner with the interposition of a first ring element (17) and/or in that the membrane element (16) is located radially inward axially on the shaft (13 ) with the interposition of a second ring element (18) is supported. Torsional vibration damper (1). claim 6 , characterized in that the first ring element (17) and/or the second ring element (18) is or are made of a plastic material and/or serves as a friction ring. Torsional vibration damper (1) according to one of the preceding claims, characterized in that the membrane element (16) consists of metal, in particular sheet metal and/or spring steel. Torsional vibration damper (1) according to one of the preceding claims, characterized in that the membrane element (16) has a centrally arranged fastening area (19) in which lead-through openings (20) for rivet elements (15) or other fastening means are provided and wherein radially on the inside and radially externally provided conically cupped ring areas (21, 22) designed like disk springs. Torsional vibration damper (1). claim 9 , characterized in that the potted annular area (22) formed radially on the inside has bores (23), in particular for screws (24) for screwing the torsional vibration damper (1).

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