DE102006030136A1 - Dual-mass flywheel for damping vibrations in between engine and drive train of vehicle has secondary mass whereby friction clutch for housing is present radially outside friction surface, and radially inside for component - Google Patents

Abstract

Dual-mass flywheel (2) consists of a primary mass (3) and a secondary mass (4). The secondary mass is formed as a sheet metal molded part (6) and the friction surface (27) is formed for a friction lining of a clutch disk. The friction clutch for the housing is present radially outside the friction surface, axially opposite to the offset fixing area (25). The friction clutch for the component is present radially inside the friction surface, axially opposite to the offset connecting area. The fixing area and the connecting area, related to the friction surface, are axially offset in opposite directions.

Description

The The present invention relates to a torsional vibration damper, in particular a dual-mass flywheel, with a primary flywheel and a secondary flywheel, which oppose the resistance of at least one by means of stops Energy storage are rotatable relative to each other.

Out In vehicle technology, the use of torsional vibration dampers is sufficient known. For example, the primary flywheel or the primary mass wheel be arranged on the crankshaft of the internal combustion engine. The primary mass disc is by means of a bearing on a secondary pulley coaxial and rotatably mounted about a rotation axis. Finally, the primary pulp is with the secondary cup via a compressible energy storage having damping device drivingly connected. Thus, with the torsional vibration damper in particular during load changes a vibration damping be realized in the drive train of the vehicle.

Usually are used as energy storage metallic coil springs with a large Kompressionsweg used, which are accommodated in chambers in the circumferential direction, wherein for the in the circumferential direction provided energy storage respectively assigned attacks for limiting the relative movement between the primary mass disc and the secondary cup are provided. It has been shown that the striking of the spring elements at the assigned stops cause unwanted noise can. It is also possible that due to axial play between the two mass discs also noises through the touch can occur between the metallic components.

Of the Present invention has for its object a torsional vibration damper, in particular a dual mass flywheel to propose the genus mentioned above, at the unwanted Sounds preferably be avoided.

These Task can according to the invention by a torsional vibration damper, in particular a dual-mass flywheel, with a primary mass disc and a secondary cup solved which are against the resistance of at least one attacks limited energy storage are rotatable relative to each other, wherein at least one elastic buffer element or the like in such a way associated with at least one stop is that one in the circumferential direction and / or acting in the axial direction of impact damping can be realized.

at The inventively proposed torsional vibration damper can by the respectively provided elastic buffer elements noise avoiding the collision of metallic components, since the buffer element in each case between these components, in particular during Meeting these components is provided so that impact noise avoided become. For example, a buffer element between each Energy storage and the associated attacks be provided. moreover the buffer element can be designed such that even at a potential Tilting game on the secondary pulley the distance between the secondary flywheel or the secondary flywheel and the lid or the flange bounded by the buffer member is. That way you can impact noises on the metallic surfaces avoided in the torsional vibration damper according to the invention become.

in the Within the scope of an advantageous development of the present invention it can be provided that the inventively proposed torsional vibration damper as Energy storage several over The bow arranged distributed around the circumference, so that the torsional vibration damper as bow spring damper is formed, wherein between the ends of adjacent bow springs a common stop is provided, which with a buffer element equipped is what about the Stop in the direction of the respective end of each bow spring and in axial direction over one on the primary pulp protrudes arranged lid. By overhanging the buffer element over both Ends of the stop can with the one buffer element in both Bow springs achieved a stop noise damping become. Due to the elastic properties, the buffer element under Load at installation of the bow spring force are compressed in such a way that it is almost moved to the level of the stop. In addition, can the buffer element by its axial extent also a Kippspiel the secondary cup compensate. Appropriately it may be when multiple buffer elements are offset in the circumferential direction (for Example 90 °, 120 ° or 180 °) are.

In order to realize an optimal damping, the buffer element may comprise a housing made of an elastic plastic or the like. There are also other materials conceivable. By a suitable design of the housing of the buffer element of the z. B. the secondary pulley turned area of the housing of the buffer element realize a soft stop for the secondary disc, for example, when tumbling in the play of the bearing. Thus, the bearing is protected from additional loads by Taumelkräfte and noise when possible striking avoided.

A possible embodiment The present invention may provide that the housing of the Buffer element is integrally formed. In a one-piece Design of the housing the buffer element can be realized a compact design. To the elastic properties of the buffer element in the one-piece Implementation can be provided according to a next development be that approximately at the central region a recess, for example provided in the form of a slot or the like as a movement joint is. Thus, the housing of the buffer element are pressed together under load to a corresponding attenuation the impact forces to enable and therefore noises to avoid.

A another embodiment The present invention may provide that the housing of the Buffer element z. B. formed in two parts with two corresponding housing halves is. Not only in this embodiment it is advantageous if at least one spring element, preferably in the form of a compression spring, is housed in the housing, so that the distance between the two housing halves under compression of the Compression spring can be reduced, the two housing halves after End of the external load diverged again can be.

Preferably can in this embodiment be provided that the housing halves guide elements or the like, with which the housing halves can be moved to each other. When guide elements can z. B. pins and corresponding holes for receiving the pin provided on the housing halves be. There are also other guides possible.

in the Frame of an advantageous embodiment of the present invention It is also conceivable that in the one-piece housing the buffer member arranged a compression spring as a spring element in the housing is to continue the elastic properties of the buffer element to improve. Independently from the one-piece or two-piece design of the housing the compression spring with their ends in each case in an end region of the respective housing be included. For example, in the end regions of the housing corresponding recesses for the ends of the compression spring be provided, which then have piston-shaped projections, which can be inserted into the coil spring are to a guide to realize the compression spring, when these elastic movements through performs the compression of the buffer element.

Of the proposed according to the invention torsional vibration damper Can preferably in so-called dry dual mass flywheels as a stop damper and Kippspielbegren zer be used. As dry dual mass flywheels are two mass flywheels referred, which without lubricant, such as. B. fat, work.

following The present invention will be explained in more detail with reference to the drawings. It demonstrate:

1 an enlarged sectional partial view of a torsional vibration damper according to the invention;

2 a three-dimensional view of a possible embodiment of a buffer element of the torsional vibration damper according to the invention;

3 a further embodiment of a buffer element of the torsional vibration damper according to the invention;

4 a three-dimensional partial view of the torsional vibration damper according to the invention in the region of a stop for the bow springs; and

5 a rear view according to 4 ,

In 1 For example, one possible embodiment of a torsional vibration damper for use in a drive train of a vehicle is illustrated. The torsional vibration damper shown is designed as a bow spring damper and has a primary flywheel 1 on, which can be attached to a crankshaft of an internal combustion engine of the motor vehicle, which is not shown.

At the primary flywheel 1 is by means of a warehouse 2 a secondary flywheel 3 coaxial and rotatable about a rotation axis 4 stored. The primary flywheel 1 is with the secondary flywheel 3 via a compressible energy storage having damping device 5 drivingly connected. The energy stores are in the form of circumferentially elongated bow springs 6 in through a lid 7 provided essentially formed chambers. To guide the bow springs 6 is a slip bowl 8th with a sliding shoe 9 intended. In a relative rotation between the flange 10 on the secondary flywheel and the primary flywheel are the bow springs 6 which are arranged distributed in the circumferential direction, between the arms 11 the flange and the stops 12 of the lid 7 compressed.

To make sounds when hitting the bow springs 6 at the metallic stops 12 of the lid 7 To avoid, according to the invention, preferably an elastic buffer element 13 in the area of every stroke 12 be provided. Thus, impact sounds of the end of each bow spring 6 at the associated stop 12 avoided. Thus, a stop damper is realized in the torsional vibration damper according to the invention.

Furthermore, the proposed torsional vibration damper can also realize an axial Kippspielbegrenzer by the respective provided buffer element 13 such from the lid 7 projecting in the axial direction, so that the secondary flywheel 3 even with a larger axial tilt play on the buffer element 13 abuts and thus prevents the secondary flywheel on the metallic lid 7 strikes. Thus, a soft stop is also provided in the axial direction in the torsional vibration damper according to the invention.

In the proposed torsional vibration damper are preferably three buffer elements 13 circumferentially offset by about 120 ° to each other. In each case, the ends of adjacent bow springs 6 a joint attack 12 on the lid 7 the primary flywheel 1 assigned. Preferably, every stop 12 a buffer element 13 associated with its ends respectively over the stop 12 in the direction of the respective end of each bow spring 6 protrudes. Due to the elasticity of the buffer element 13 this can be compressed at least to the level of the respective stop, this has the buffer element 13 a housing formed of an elastic plastic or the like 14 , wherein in the context of a first possible embodiment, the housing 14 is formed in one piece, as well as in 2 is shown. The one-piece housing 14 has approximately in its central region a recess as a movement joint 16 on, so that under load the bow springs 6 standing buffer element 13 can be compressed. To the elastic properties of the buffer element 13 To further improve is a compression spring 15 trained spring element in the housing 14 of the buffer element 13 intended.

In 3 is another embodiment of a buffer element 13 ' of the torsional vibration damper according to the invention. In this embodiment, the housing 14 of the buffer element 13 ' formed in two parts and thus in two corresponding housing halves 17 . 17 ' divided. The two housing halves 17 . 17 ' have guide elements, so that the elastic movements of the housing halves 17 . 17 ' be guided accordingly. The elastic movements of the housing halves 17 . 17 ' be through the compression spring 15 supported. The guide elements are as pins 18 and corresponding holes 19 educated. Every case half 17 . 17 ' has a receiving area for each one end of the compression spring 15 on, with piston-shaped projections 20 are provided in the compression spring 15 penetrate to ensure adequate guidance of the compression spring 15 in the case 14 the buffer elements 13 . 13 ' to ensure. In 4 and 5 is a mounting situation of the buffer element 13 indicated by way of example.

In 4 is a three-dimensional partial view of the torsional vibration damper shown. The stop 12 is in this embodiment, the two ends of the adjacent bow springs 6 assigned. At the stop 12 is the buffer element 13 arranged such that at least a portion of the housing 14 over the respective ends of the stop 12 in the direction of the bow feathers 6 protrudes or protrudes. Thus, an impact noise between the respective end of the bow spring 6 and the stop 12 through the buffer element 13 avoided.

In 5 is a rear view according to 4 shown, in which it is clarified that the housing 14 of the buffer element 13 in the axial direction over the at the primary flywheel 1 arranged lid 7 protrudes. This will prevent the secondary flywheel 3 to the metallic lid 7 strikes. In this way, a Kippspielbegrenzung is realized in the torsional vibration damper according to the invention. Preferably, several buffer elements 13 arranged distributed over the circumference of the torsional vibration damper. Thus, the Kippspielbegrenzung can be achieved over the entire circumference.

1

Primary flywheel

 2

camp

3

Secondary flywheel

4

axis of rotation

5

attenuator

6

bow spring

7

cover

 8th

sliding

9

shoe

10

flange

11

boom

12

attack

13th 13 '

buffer element

 14

casing

 15

compression spring

16

expansion joint

17th 17 '

housing half

18

spigot

19

drilling

Claims (11)

Torsional vibration damper, in particular dual-mass flywheel, with a primary pulley and a secondary pulley, which are rotatable relative to the resistance of at least one energy storage limited by stops, characterized in that at least one elastic buffer element ( 13 . 13 ' ) at least one stop ( 12 ) is assigned, that an acting in the circumferential direction and / or in the axial direction of stop attenuation can be realized. Torsional vibration damper according to claim 1, characterized in that a plurality of distributed over the circumference arranged bow springs ( 6 ) are provided, wherein between the ends of adjacent bow springs ( 6 ) a joint attack ( 12 ) provided with the buffer element ( 13 . 13 ' ) which is above the stop ( 12 ) in the direction of the respective end of each bow spring ( 6 ) and in the axial direction via one on the primary flywheel ( 1 ) arranged lid ( 7 protrudes). Torsional vibration damper according to claim 2, characterized in that the elastic buffer element ( 13 . 13 ' ) in the circumferential direction at least to the level of the respective stop ( 12 ) is compressible. Torsional vibration damper according to claim 2 or 3, characterized in that a plurality of buffer elements ( 13 . 13 ' ) are arranged offset in the circumferential direction. Torsional vibration damper according to one of the preceding claims, characterized in that the buffer element ( 13 . 13 ' ) a housing ( 14 ) made of an elastic plastic. Torsional vibration damper according to claim 5, characterized in that the housing ( 14 ) is formed in one piece. Torsional vibration damper according to claim 6, characterized in that the housing ( 14 ) approximately in the central region a recess as a movement joint ( 16 ) having. Torsional vibration damper according to claim 5, characterized in that the housing ( 14 ) in two parts with two corresponding housing halves ( 17 . 17 ' ) is trained. Torsional vibration damper according to claim 8, characterized in that the two housing half ( 17 . 17 ' ) Have guide elements, with which the housing half ( 17 . 17 ' ) are movable relative to each other. Torsional vibration damper according to one of claims 5 to 9, characterized in that the housing ( 14 ) of the buffer element ( 13 . 13 ' ) at least one compression spring ( 15 ), each end of the compression spring ( 15 ) in one of the end regions of the housing ( 14 ) is recorded. Torsional vibration damper according to one of claims 1 to 10, characterized in that the at least one buffer element as an axial damping element for the Secondary pulley at Tumbling movements of the same serves.