DE10254487A1 - Device for reducing torsional vibrations - Google Patents

Abstract

A device (20) for reducing torsional vibrations is described, with a hub disk (21), with two axially spaced-apart limiting elements (23, 25), the hub disk (21) and the limiting elements (23, 25) each having at least one recess ( 22, 24, 26), and wherein the recesses (22, 24, 26) form at least one receiving space (27) for a damper element (28) and with at least one damper element (28) which is located in the at least one receiving space (27) is arranged. To prevent the wear and tear on the damper element (28) or on the hub disc (21) and the limiting elements (23, 25) due to centrifugal forces that occurs during operation of the device (20), which can be arranged, for example, in a clutch disc (10) According to the invention, it is proposed that at least one further spring device (40) is provided in the at least one receiving space (27), the spring device (40) being designed to convert a movement of the damper element (28) in the circumferential direction into a radial movement , For example, the spring device can be designed in the form of a corrugated leaf spring.

Description

The present invention relates to a device for reducing torsional vibrations according to the preamble of claim 1.

Acting in such devices it is, for example, so-called torsion damper, which, among other things, in Motor vehicles are used. With a torsion damper in Motor vehicles are generally a component through which Torsional vibrations between an internal combustion engine, such as an internal combustion engine, and a gearbox damped become.

Devices for reducing Torsional vibrations of the known type basically have a hub disc and two limiting elements axially spaced apart. The axial Spacing usually refers to this on the axis of rotation of the device. With the boundary elements it is, for example, two cover plates, a carrier plate and a cover plate or the like. The boundary elements as well the hub disc usually have in each case at least one recess, the individual recesses are aligned with each other such that they have at least one receiving space for a damper element form. Furthermore, devices of the known type usually have at least one damper element on, which is arranged in the at least one receiving space. at the damper element it can be, for example, a coil spring. The Kinetic energy resulting from the relative movement of the hub disc to the boundary elements, at least one of them damper element added.

Such reduction devices of torsional vibrations, especially if they are are used in motor vehicles, usually in a centrifugal field. By centrifugal forces become the damper elements pressed against the upper edges of the recesses. At the same time, one finds Relative movement of the hub disc to the limiting elements instead.

All of these factors lead to wear both in the recesses as well as in the damper element itself. In addition, the damper elements due to the centrifugal force on the upper edges of the recesses or Get stuck in the recording room, what the function of the device for reducing torsional vibrations (of the torsion damper) negatively affected.

So far, some have been constructive Solutions for this Found a problem, such as adjusting the geometry of the recording room, a hardening the hub disc, or the limiting elements, or the use of special sliding shoes.

Adjusting the geometry of the recesses, or the recording room, but does not always lead to the desired Results. Especially when using relatively heavy damper elements and at higher speeds the wear anyway still relatively high. Also hardening the hub disc, respectively the limiting elements or a combination of the two mentioned Activities, is in many cases unsatisfactory. The use of special sliding shoes can be used in some make lead to a sensible remedy for the wear problem, however for reasons of installation space not always possible.

The present invention is based on this the task is based on a device for reducing torsional vibrations of the type mentioned in such a way that the occurring wear can be further reduced.

According to the invention, this object is achieved by the. Device for reducing torsional vibrations with the features according to the independent claim 1. Other advantages, features, details, aspects and effects of Invention result from the dependent claims, the description and the drawings.

According to the invention, a device for reducing provided by torsional vibrations, with a hub disc, with two axially spaced limiting elements, the hub disc and the delimiting elements each have at least one recess, and wherein the recesses have at least one receiving space for a damper element form, and with at least one damper element, which in the at least one Recording room is arranged. The device according to the invention is thereby characterized in that in the at least one receiving space provided at least one spring device is and that the spring device for converting a movement of the damper element in the circumferential direction is formed in a radial movement.

By using an additional Spring device in the receiving space can the damper elements of the device effective from the top surface be kept away from the recording space, whereby the wear and the possible getting caught of the damper elements completely avoided, but at least significantly reduced.

This is done according to the invention by the specially designed spring device designed in this way is, that you a movement of the damper element in the circumferential direction in a radial movement of the damper element can convert.

According to the invention, the spring device is arranged in the receiving space of the device. The receiving space is in turn formed or delimited by various recesses which are formed in the delimiting elements and in the hub disk. The recesses are preferably arranged such that they are located radially on one and the same plane with respect to the axis of rotation of the device. In this way, the individual recesses form a type of window in which the damper element or individual components of the damper element are arranged or through which the damper element extends.

The invention is not limited to one certain number of recording rooms and damper elements limited. Basically can it may already be sufficient if a single receiving space in the device is provided, in which a single damper element is arranged. Naturally can in the device also more than one receiving space and more than one damper element be provided. The number of damper elements and receiving spaces required results depending on the field of application of the device according to the invention.

For example, the device installed in a clutch disc, in a dual mass flywheel or the like his. Naturally are also other areas of application of the device according to the invention conceivable so that the Invention is not limited to the two examples described.

The boundary elements can it is for example cover plates, carrier plates and the like. The damper element can, for example, but not exclusively, be designed as a coil spring his.

The at least one can be advantageous Spring device at least partially in the at least one receiving space be clamped. The clamping of the spring device can done in any way so that the invention is not specific Types of clamps limited is. The spring device is preferably on the delimiting elements as well as the hub disc.

The at least one can be advantageous Spring device with respect to the axis of rotation of the device at least partially radially outside be arranged lying of the at least one damper element. In this way, the spring device is from the direction seen the axis of rotation of the device, above the damper element.

The invention is not specific Embodiments of the spring device limited. Below are some non-exclusive examples for possible design variants the spring device described, without the invention to the above Examples limited would.

For example, that the at least one spring device is designed as a leaf spring. This leaf spring can advantageously be designed as a corrugated leaf spring be, the leaf spring in such a case one or more Can have waves.

Such a leaf spring can, for example, as already explained above was, above the damper element, for example above a helical spring, can be clamped in the receiving space, and thus like the damper element for example, alternating with the boundary elements, such as the Cover plates on the right and the hub disc on the left, or the other way around guided and be tense.

Especially when the leaf spring is designed as a corrugated leaf spring, this is mainly on Pressurized so that it resembles an accordion is compressed. This will increase the heights the shaft and the damper element pressed radially inwards. In this way, the conversion of the movement takes place in the circumferential direction towards a radial movement instead. To a larger circumferential movement in a translating a relatively small radial movement is the leaf spring advantageously formed with several shafts, the size and number of the individual waves is variable. The leaf spring could only with a single shaft in the middle or with several waves distributed over the Length of Leaf spring on the damper element act.

Because the leaf spring is exactly the same Circumferential movement like the damper element, there is no Relative movement between the damper element and the leaf spring. In such a case, it is advantageous if the limiting elements the damper element support can.

In another embodiment, the Spring device can be designed, for example, as a spring clip. Such a spring clip also converts the circumferential movement into a radial movement. By the centrifugal force tries the damper element of the Device radially outwards to hike. The spring clip prevents this movement and acts on the damper element along it own axis so that the Spring force of the spring clip against the centrifugal force works.

It is advantageously provided that the damper element over the spring clip so far pressed radially inwards will that no Contact with the boundary elements arises.

Preferably, the spring clip in the hub disc be used.

If the hub disc only one side of the damper element leads, are about the spring clip preferably realized two levers. These levers have the task of being the damper element in the middle or along the entire length to push radially inwards.

By the as described above device according to the invention becomes a novel possibility wear reduction or minimizing the damper elements getting stuck realized. The device according to the invention can especially at higher speeds with heavy damper elements, but also used with a smaller and smaller installation space become.

The invention will now be described using exemplary embodiments with reference to the enclosed ing drawings explained in more detail. Show it:

1 a plan view of a portion of a clutch disc with an integrated device for reducing torsional vibrations, the device having a spring device in the form of a leaf spring in the receiving space;

2 an enlarged view of the in 1 shown device for reducing torsional vibrations;

3 a sectional view of the in 1 clutch plate shown;

4 a schematic diagram of the spring device designed as a corrugated leaf spring;

5 a plan view of the portion of the clutch disc after 1 , wherein the spring device is in the pressed state;

6 a plan view of a portion of another embodiment of a clutch disc, in which the spring device located in the receiving space is designed as a spring clip;

7 an enlarged partial section from the in 6 shown device for reducing torsional vibrations;

8th a representation of the in the 6 and 7 shown spring clip

9 a plan view of a portion of a two-mass flywheel with an integrated device for reducing torsional vibrations, the device having a spring device in the form of a leaf spring in the receiving space; and

10 a sectional view of the in 9 illustrated two-mass flywheel.

In the 1 and 3 is initially a clutch disc 10 shown with a hub 11 a drive shaft, not shown, is connected. The clutch disc 10 is still in the coupled state in connection with two clutch pressure plates 12 . 13 ,

The clutch disc 10 rotates about an axis of rotation A, the direction of the axis of rotation A in 1 “Runs in the direction of the plane normal of the sheet on which the 1 is shown ".

In the clutch disc 10 a device 20 for reducing torsional vibrations is provided, which is a so-called torsion damper. 2 shows an enlarged view of such a device 20 ,

How especially out 3 can be seen, the device 20 a hub disc 21 on that with the hub 11 the drive shaft, not shown, is connected. Furthermore, the device 20 over two delimiting elements 23 . 25 , which can be, for example, cover plates, a carrier plate and a cover plate or the like. The boundary elements 23 . 25 are in relation to the axis of rotation A of the clutch disc 10 radially spaced from the hub disc 21 arranged.

In the hub disc 21 as well as the boundary elements 23 . 25 are recesses 22 . 24 . 26 provided that lie radially on a plane with respect to the axis of rotation A. With the recesses 22 . 24 . 26 it is a kind of window that houses a recording room 27 for a damper element 28 forms. The damper element 28 , which can be a coil spring or the like, for example, is in the receiving space 27 arranged or clamped.

How especially out 1 can be seen, the device 20 to reduce torsional vibrations more than one recording space 27 and more than a damper element 28 exhibit. The number of damper elements 28 and recording rooms 27 depends on the type of use of the device 20 ,

During clutch disc operation 10 is the kinetic energy that occurs during the relative movement of the hub disc 21 to the boundary elements 23 . 25 arises from the damper elements 28 added. Because the clutch disc 10 located in a centrifugal force field, the damper elements 28 due to the centrifugal forces on the radially outer (upper) edges of the recesses 22 . 24 . 26 and thus the recording room 27 pressed. At the same time, the relative movement of the hub disc to the limiting elements takes place 23 . 25 instead of. Now about the resulting wear on the limiting elements 23 . 25 as well as the hub disc 21 in the area of the recesses 22 . 24 . 26 to reduce and to prevent the damper elements 28 during operation on the recesses 22 . 24 . 26 get stuck, it is provided according to the invention that within the receiving space 27 at least one further spring device is provided. This spring device can be designed in different ways.

In the embodiment according to the 1 to 5 is this additional spring device as a corrugated leaf spring 40 educated. The corrugated leaf spring 40 is located radially outside of the damper element with respect to the axis of rotation A 28 in the recording room 27 or in the recesses 22 . 24 . 26 arranged, for example clamped. For example, the leaf spring 40 as well as the damper element 28 alternating from the boundary elements 23 . 25 right and the hub disc 21 left, or the other way around and be tense. The leaf spring 40 is on or in the hub disc 21 as well as the boundary elements 23 . 25 clamped. In the 1 and 2 is the edge 29 the hub disc 21 and one of the boundary elements.

The corrugated leaf spring 40 is mainly subjected to pressure, so that it is compressed like an accordion. This increases the heights of the individual waves 41 the leaf spring 40 , and the damper element 28 is pushed radially inwards. In 5 is shown a situation in which the leaf spring is in the pressed, that is, in the compressed state. In 5 is clearly the relative movement of the hub disc 21 to the boundary elements, here to the boundary element 23 to see.

Due to the wave-shaped design of the leaf spring 40 is achieved that the movement of the damper element 28 is converted into a radial movement in the circumferential direction. In order to translate a larger circumferential movement into a relatively small radial movement, the leaf spring has 40 advantageously several waves 41 on, the size of each wave 41 is variable. In 4 is a schematic diagram of such a leaf spring 40 shown with the leaf spring 40 multiple waves 41 having. In principle, however, it is also conceivable that the leaf spring 40 just a single wave 41 having. The individual waves 41 the leaf spring 40 act over the entire length of the damper element 28 on this one.

In the 6 to 8th is another embodiment of a clutch disc 10 shown, this clutch disc 10 in its basic structure that clutch disc 10 corresponds to how in the 1 to 5 is shown. For the basic structure of the clutch disc 10 is therefore based on the statements made above with regard to 1 to 5 Referenced and hereby referred. The same components have been given identical reference numbers.

In contrast to that in the 1 to 5 clutch disc shown 10 indicates the in the 6 to 8th shown clutch disc 10 a device 20 to reduce torsional vibrations, in which the additional in the recording room 27 provided spring device in the form of a spring clip 50 is trained. This spring clip 50 also converts the circumferential movement into a radial movement. The damper element tries by centrifugal force 28 the device 20 to move radially outwards. The spring clip 50 prevents this movement and acts on the damper element 28 along its own axis so that the spring force of the spring clip 50 acts against the centrifugal force. The damper element 28 Advantageously pressed so far radially that no contact with the limiting elements 23 . 25 arises. The spring clip 50 is advantageous only in the hub disc 21 used: But since the hub disc 21 only one side of the damper element 28 leads, in such a case two levers are necessary, which have corresponding support areas 51 of the spring clip 50 will be realized. Over the support areas 51 and an intermediate spring area, it is possible that the spring clip 50 the damper element 28 centered or along the entire length of the damper element 28 pushes radially inwards.

When turning the device 20 to reduce torsional vibrations, for example a torsion damper, the damper element is supported 28 to the support area 51 the spring device 50 and thus acts on the axis of the damper element 28 vertical leg 53 of the spring clip 50 that serves as a bell crank. The second leg 52 of the spring clip 50 consequently acts on the damper element 28 and that is perpendicular to its axis. The effect is therefore opposite to the centrifugal force.

The force of the damper element 28 that result from the introduction of engine torque into the torsion damper 20 arises, is used against centrifugal force.

As in 8th is shown, the spring clip 50 Be U-shaped. This allows advantageous guidance relative to the hub disc 21 be guaranteed. This also increases the stiffness of the spring clip.

In the 9 and 10 is, after all, a two-mass flywheel 14 shown, in which the device according to the invention 20 to reduce torsional vibrations. The structure of the device 20 corresponds to the structure of the 1 to 5 shown device 20 , so that to avoid repetition with regard to the structure and operation of the explanations on the 1 to 5 is referred. In this example, the spring device is again a leaf spring 40 educated.

By the device according to the invention 20 to reduce torsional vibrations it becomes possible to use the damper elements 28 easily from the top surfaces of the recesses 22 . 24 . 26 or the recording room 27 keep. This can both wear on the boundary elements 23 . 25 , the hub disc 21 as well as the damper elements 28 completely avoided, but at least significantly reduced. Furthermore, there is also the risk of the damper elements getting caught 28 on the recesses 22 . 24 . 26 be reduced at least to a considerable extent.

10

 clutch disc

11

 hub a drive shaft

12

 Clutch Pressure Plate

13

 Clutch Pressure Plate

14

 Two-mass flywheel

20

 contraption to reduce torsional vibrations

21

 hub disc

22

 recess in the hub disc

23

 limiting element (Shroud)

24

 recess in the delimitation element

25

 limiting element (Shroud)

26

 recess in the delimitation element

27

 accommodation space

28

 damper element (Coil spring)

29

 Einspannschenkel (Spring legs)

40

 spring means (Leaf spring)

41

 wave the leaf spring

50

 spring means (Spring clip)

51

 support area

52

 spring range

A

 axis of rotation

Claims (7)

Device for reducing torsional vibrations, with a hub disc ( 21 ), with two axially spaced boundary elements ( 23 . 25 ), the hub disc ( 21 ) and the boundary elements ( 23 . 25 ) at least one recess ( 22 . 24 . 26 ), and wherein the recesses ( 22 . 24 . 26 ) at least one recording room ( 27 ) for a damper element ( 28 ) form, and with at least one damper element ( 28 ), which in the at least one recording room ( 27 ) is arranged, characterized in that in the at least one receiving space ( 27 ) at least one spring device ( 40 . 50 ) is provided and that the spring device ( 40 . 50 ) for converting a movement of the damper element ( 28 ) is formed in a radial movement in the circumferential direction. Device according to claim 1, characterized in that the at least one spring device ( 40 . 50 ) in the at least one recording room ( 27 ) is clamped. Device according to claim 1 or 2, characterized in that the at least one spring device ( 40 . 50 ) with respect to the axis of rotation (A) of the device ( 20 ) at least partially radially outside of the at least one damper element ( 28 ) is arranged. Device according to one of claims 1 to 3, characterized in that the at least one spring device as a leaf spring ( 40 ) is trained. Device according to claim 4, characterized in that the spring device ( 40 ) is designed as a corrugated leaf spring and that the leaf spring ( 40 ) one or more waves ( 41 ) having. Device according to one of claims 1 to 3, characterized in that the at least one spring device as a spring clip ( 50 ) is trained. Device according to claim 6, characterized in that the spring clip ( 50 ) in the hub disc ( 21 ) is used.