DE102017114612A1 - torsional vibration dampers - Google Patents

Abstract

A torsional vibration damper comprising a drive part (2) rotatable about an axis of rotation and a Tilgermasseteil (4) rotatable about the axis of rotation relative to the drive part (3), wherein the absorber mass part (4) has a restoring force which is generated by at least one spring element (6) compressed during a rotation. and at least one resetting device (9) acting as a force-dependent force is generated, can be reset from a position deflected relative to the drive part (2).

Description

The invention relates to a torsional vibration damper comprising a drive part rotatable about an axis of rotation and a Tilgermasseteil rotatable about the axis of rotation relative to the drive part.

Such a torsional vibration damper is used in torque transmitting arrangements for the eradication or damping of any torsional vibrations, it is a so-called spring-mass absorber. For example, such a torsional vibration damper is arranged in a drive train of a motor vehicle in order to pay off any torsional vibrations that are usually system-inherent in the drive train of an internal combustion engine.

Such a torsional vibration damper usually consists of a rotatable about an axis of rotation and torque-loaded drive member and a rotatable relative to the drive member about the rotation axis Tilgermasseteil, drive and Tigermasseteil are usually about one or more spring elements relative to each other against the spring action rotatable. Due to the moment of inertia, the Tilgermasseteil shifts at an entry of torsional vibrations on the drive member against the action of the or the spring elements, so that energy is withdrawn via the spring deformation and the relative movement of the vibration and time-delayed returned to the system. By means of this eradication, a calming down of the torque curve can be achieved so that the resulting torque output, for example to a downstream transmission, is more homogeneous. Examples of such torsional vibration absorber are in DE 198 40 664 A1 or DE 10 2014 223 308 A1 described.

As stated, the relative rotation of the drive part to the absorber mass part takes place against one or more spring elements, which are thereby deformed. Since the deflection is based on a vibration in a corresponding frequency and amplitude, consequently, a varying moment, which leads to the deflection, which thus increases and decreases. Therefore, it is necessary to reset the deflection of drive part to Tilgermasseteil also as quickly as possible. The provision is made exclusively via the or the compressed in the deflection spring elements. However, this restoring moment or this restoring force may sometimes not always be sufficient in individual cases to obtain the provision in the required manner.

The invention is therefore based on the problem of specifying a contrast improved torsional vibration damper.

To solve this problem is provided according to the invention in a torsional vibration damper of the type mentioned that the Tilgermasseteil is recoverable from a relative to the drive part deflected position via a restoring force, which is generated by at least one compressed at a rotation spring element and at least one centrifugal force acting restoring position.

In the torsional vibration damper according to the invention a combined provision is provided with particular advantage, which is provided from the restoring force of the or in the deflection compressed spring elements and a speed-adaptive restoring force, which is generated by means of a centrifugal force acting restoring device. In the torsional vibration damper according to the invention, one or more spring elements are provided between the absorber mass, for example a ground ring, and the drive part, which are compressed during deflection and generate the first restoring force component. In addition, the centrifugal force acting restoring device which exerts an additional speed-adaptive restoring force or a speed-adaptive restoring moment on the Tilgermasseteil. So it comes to the combination or addition of two generated by separate means restoring force components respectively restoring moments that act together on the Tilgermasseteil.

This combined provision leads with particular advantage to an increase in the restoring torque, which is the greater, the greater the speed or the centrifugal force, which acts on the centrifugally dependent acting restoring device.

This can be a significantly improved provision of the deflection of the absorber mass part can be achieved, resulting in an improvement in Tilgerleistung.

The absorber mass part can be coupled via at least one spring element acting in the circumferential direction, while the restoring device has at least one centrifugally-dependent, radially movable restoring element, which is coupled to the absorber mass part. The first return component is provided via or over the circumferentially acting and thus also in the circumferential direction compressed spring elements, which are thus compressed in the direction of rotation. The restoring device, which supplies the second restoring component, is characterized by a centrifugally dependent radially movable return element, which is moved in the direction of the deflecting or moving centrifugal or centrifugal force, so that a speed-sensitive generation of the restoring force is possible.

In this case, the restoring element may be either pivotally mounted, so therefore designed as a kind of lever and pivotally mounted on the drive part. Alternatively, it is also possible to move the restoring element linearly, in this case, of course, radially. Regardless of whether the restoring element is now mounted pivotably or linearly movable, it is expediently coupled via a coupling element with the Tilgermasseteil.

It is expedient, furthermore, if the restoring element is tensioned radially outward via a spring component, that is to say that a preload is applied via the spring component to the restoring element, which permanently couples it via the coupling element to the absorber mass part. Such a spring component is for example a simple helical compression spring.

The coupling of the return element to the absorber mass takes place, as stated, via the coupling element. This is designed according to an expedient development of the invention as a role. To guide this, a curved guide rail is provided on the return element and / or on the Tilgermasseteil on which rolls the role. On the geometry of this guideway in conjunction with the force exerted on the coupling element, the force acting in the circumferential direction restoring force can be defined or adjusted accordingly.

As described, there is the possibility of pivoting the restoring element, in this case it is designed as a one-sided articulated pivoting lever, which is preferably biased radially outwards via a spring component. Alternatively, in the case of a linear movement bearing of the restoring element, this can be designed as a sliding piston, that is, it is a linearly displaceable sliding piece on which, for example, the guide track is formed, on which the coupling element is accommodated in the form of the roller.

Alternatively to the above-described embodiment of the return device comprising the pivotally mounted return element in the form of the lever or the linearly movable return element in the form of the sliding piston, which are each coupled via a coupling element in the form of a roller or the like with the Tilgermasseteil, provides a second variant of the invention that the restoring device is a leg spring arranged on the drive part, which is coupled to the absorber mass part via a coupling roller which rolls on a track of the leg spring. In this variant of the invention, therefore, a leg spring is used, which is coupled via a coupling roller with the Tilgermasseteil. This coupling roller rolls on a track of the leg spring, which is curved, so that, depending on the relative position of the coupling roller on the guideway results in a deformation of the leg spring, which serves the damping. On the other hand, the leg spring respectively her leg, on which the coupling roller runs, also centrifugally dependent radially deformable, that is, on the one hand on the torsion spring on the coupling roller deformation a restoring force is built, but on the other hand also an additional restoring component due to the speed-adaptive radial deflection. This speed-dependent restoring force component now acts in addition to the restoring force, which is or over the or the other spring elements, usually coil springs, which are preferably in turn arranged in the circumferential direction, and via which the drive member is coupled to the Tilgermasseteil. In this embodiment, therefore, one or more spring elements in the form of coil springs and at least one leg spring, which are each coupled to both the drive part and the Tilgermasseteil used. Again, the restoring effects of the spring or the elements in the form of the coil spring and the restoring component of the leg spring, which also has a centrifugal restoring component support the entire return movement of the absorber mass part.

As described, it is expedient if the or each spring element, for example as described in the form of the helical spring, is supported at one end on the drive part and at the other end on the Tilgermasseteil. For this purpose, appropriate receptacles or abutments are provided for the coil spring on the two parts.

An advantageous development of the invention provides that another, the leg spring is provided with the raceway having portion radially outwardly exciting spring member. This spring component, for example, again a helical spring, is arranged between the drive part and the leg of the leg spring, on which the coupling roller runs, and supported on both. About this spring element of the leg is biased radially outward, so therefore stretched the coupling roller against the carrier mass portion. This can be used to further improve the restoring effect.

With respect to both inventive alternatives, it is expedient if a plurality of spring elements, in particular the already described helical spring, are provided distributed around the circumference. These can be at the same radius or at different radii. They can also lie in a common plane or be arranged axially offset from one another. Likewise, it is conceivable to additionally or alternatively also provide a plurality of restoring devices distributed around the circumference. So in the case of the first alternative several pivot lever, for example, two mutually offset by 180 ° opposite pivot lever, or corresponding slide piston may be provided. It is also conceivable, for example, to provide two leg springs also offset by 180 °, which are connected to a common drive part.

• 1 eine Prinzipdarstellung eines erfindungsgemäßen Drehschwingungstilgers in Form einer Teilansicht einer ersten Ausführungsform,
• 2 eine Schnittansicht entlang der Linie II - II aus 1,
• 3 eine Schnittansicht entlang der Linie III - III aus 1,
• 4 eine Schnittansicht entlang der Linie IV - IV aus 1,
• 5 eine Prinzipdarstellung einer zweiten Ausführungsform eines erfindungsgemäßen Drehschwingungstilgers,
• 6 eine Prinzipdarstellung einer dritten Ausführungsform eines erfindungsgemäßen Drehschwingungstilgers, und
• 7 eine Teilansicht des Drehschwingungstilgers aus 6 mitzusätzlichem Federbauteil.

The invention will be explained below with reference to embodiments with reference to the drawings. The drawings are schematic representations and show:

• 1 3 is a schematic representation of a torsional vibration damper according to the invention in the form of a partial view of a first embodiment,
• 2 a sectional view taken along the line II - II 1 .
• 3 a sectional view taken along the line III - III 1 .
• 4 a sectional view taken along the line IV - IV 1 .
• 5 a schematic diagram of a second embodiment of a torsional vibration damper according to the invention,
• 6 a schematic diagram of a third embodiment of a torsional vibration damper according to the invention, and
• 7 a partial view of the torsional vibration damper 6 with additional spring component.

1 shows a schematic view of a torsional vibration damper according to the invention 1 comprising a drive part 2 that has an internal toothing 3 to connect with a wave. Furthermore, a Tilgermasseteil is provided 4 in the form of a massing 5 , which is relative to the drive part 2 can be rotated about the central or rotary axis. The drive part 2 and the Tilgermasseteil 4 are preferred over several spring elements 6 here in the form of coil springs 7 against the restoring force rotatable, that is, the coil springs 7 be compressed at a rotation of the parts to each other, whereby a restoring force is built up, which restores both parts back to the starting position when the twisting torque is reduced again.

The spring elements 6 , which are distributed symmetrically around the circumference, are in appropriate receptacles 8th , on the drive part 2 and at the Tilgermasseteil 4 are formed, received and there endseitig superimposed, such that each relative rotation of both parts in both directions of rotation to each other to a compression of the spring elements 6 leads.

Furthermore, an additional restoring device is provided 9 , which serves the return operation of the two twisted parts 2 . 4 to support. This reset device 9 includes a return element 10 in the form of a pivot lever 11 that is about a pivot axis 12 rotatable on the drive part 2 is attached. He has an arc shape at least on its radial outer side 13 on, at the arched or wave-shaped recess 14 is trained. This depression 14 There is also a bow-shaped or wave-shaped depression 15 on the inner circumference of the absorber mass part 4 So the massing 5 is trained, opposite. Between the pivot lever 11 and the massing 5 in the two recesses 14 . 15 received, is a coupling element 16 in the form of a ball or roller 17 that move freely on the guideways 18 . 19 that over the recesses or in the area of recesses 14 . 15 are trained rolls. Also is the ball or roller 17 held between two mass parts not shown.

The reset device 9 is in its function centrifugal force-dependent, that is, the restoring force, the two relative to each other twisted parts 2 . 4 returns to the starting position, centrifugal force and thus speed-dependent, it is greater, the greater the speed or centrifugal force. This means that centrifugal force caused the pivot lever 11 is urged radially outward. He presses the role 17 against the mass ring, it runs as a result of the twisting of drive part 2 to carrier mass part 4 on the rising guideways 18 . 19 on. Due to the variable radial force caused by the centrifugal force induced deflection of the pivot lever 11 on the role 17 is exercised, in conjunction with the slopes of the guideways 18 . 19 Consequently, a variable, centrifugally dependent restoring force, which has a component directed in the circumferential direction, via this restoring device 9 generated.

This via the reset device 9 generated restoring force component acts in addition to the provision on the deformed spring elements 6 So the coil springs 7 , Thus, both restoring force components add up to an overall restoring force, which is significantly greater than the restoring force, which is exclusively via the spring elements 6 is produced. This makes the provision much faster and more efficient.

Another advantage of the described embodiment, in addition to the improvement of the provision and thus the Tilgerleistung, is further the avoidance of impact noise on the part of the pivot lever 11 at the Tilgermasseteil 4 because this is about the spring elements 6 is prevented.

Also by an embodiment of the spring elements 6 with non-linear characteristic, a deflection-dependent increase in the over the spring elements 6 achieved restoring force component can be achieved.

Optionally, because not mandatory, is also shown an additional spring component 20 , which is shown here only dashed. This is on a support also shown only in dashed lines 21 on the drive part 2 on the one hand and on the other hand on the inside of the pivot lever 11 supported. About this spring component 20 becomes the return element 10 , so here the pivot lever 11 , biased radially outwards so that it is in permanent coupling to the roller 17 and thus to the Massering 5 is.

The 2 - 4 show different sectional views in different cutting planes. 2 shows a sectional view along the line II - II. Shown is the drive part 2 made of an inner, sleeve-shaped hub component 22 and a disc-shaped carrier attached thereto 23 consists. On the carrier 23 is the pivot lever 11 attached, including a journal 24 serves (see 3 ), which at the same time the pivot axis 12 forms.

2 also shows next to the pivot lever 11 also the role 17 as well as the mass ring 5 and the on the pivot lever 11 as well as at the Massering 5 provided guideways 18 . 19 ,

While 3 as described, the sectional view through the bearing point of the pivot lever 11 shows, shows 4 a sectional view through the region of the spring element 6 acting as a coil spring 7 is executed. Clearly visible is the recess 8th in which the coil spring 7 is included.

5 shows a further inventive embodiment of a torsional vibration damper according to the invention 1 a second embodiment, wherein the same reference numerals are used for the same components.

Also provided here is a drive part 2 with hub component 22 and carriers 23 and a Tilgermasseteil 4 in the form of a massing 5 , Both are also here via one or more spring elements 6 in the form of coil springs 7 , in turn, in a corresponding recording 8th are taken against the restoring force rotatable. The coil springs 7 are also here, as in the embodiment according to 1 , aligned in the circumferential direction.

Again, there is an additional reset device 9 provided here a reset element 10 in the form of a sliding piece or sliding piston 25 has, along a linear guide 26 , for example, in a guide groove on the carrier 23 is formed, is radially movable. About a spring component 20 , which is provided here by way of example, and on the one hand on a support 21 on the carrier 23 and on the other hand on the sliding piston 25 is supported, is the sliding piston 25 biased radially outward.

On its outside it has a bow-shaped recess 14 on, which also here a guideway 18 for a ball or roller 17 on the other hand, in one at the massing 5 trained deepening 15 that is a guideway 19 forms, rests. Again, there are arched guideways 18 . 19 intended.

Will the Massering 5 relative to the drive part 2 twisted, so on the one hand, the coil springs 7 curious; excited. On the other hand, the role is running 17 on the relatively twisted guideways 18 . 19 on, over what, because of the sliding piston 25 on the one hand via the spring component 20 On the other hand, however, is also pressed over the given centrifugal force radially outward, the additional restoring force component on the return device 9 is produced.

6 shows an embodiment of a torsional vibration damper according to the invention 1 , Shown here is the drive part 2 with the hub component 3 , on which in the example shown a leg spring 26 which is directly connected here, but can also be connected via a joint. The drive part 3 is here on a shaft, over which it is driven.

The thigh feather 26 has a thigh 27 on, on which a guideway 28 is provided, which is curved. On this runs a role 29 , for example, about a fixed axis of rotation on Tilgelrmasseteil 4 is rotatably mounted. In a twist resulting from a vibration to be damped, the role also runs here 29 on the relatively twisted leg spring 26 respectively the thigh 27 and its guideway 28 on, it comes to a deformation of the leg spring 26 , the thigh 27 is bent radially slightly inward, resulting in a restoring force generation results. This is a first restoring force component, over which the parts 2 and 4 be restored again generated.

In addition, the thigh is 27 also by the centrifugal force effect radially outward pressed. So it is pressed at higher and higher speed radially outward, thus against the role 29 , This results from the curved guideway 28 a speed-dependent restoring force, which represents an additional restoring force component. Also hereof is therefore - as in the embodiments described above - a speed-adaptive variation of the total restoring force possible. Thus forms the leg spring 26 In addition, a restoring force dependent acting restoring device 9 in which the thigh 27 the reset element 10 forms.

Furthermore, in 6 a total of four spring elements 6 in the form of corresponding coil springs 7 shown on the one hand at the mass part 5 supported, but on the other hand on a corresponding support 30 on the drive part 2 , These spring elements 6 corresponding to the spring elements 6 the embodiments described above. At a rotation of the parts 2 and 4 in each case two of the spring elements are relative to each other 6 compressed and build the corresponding restoring force acting in the circumferential direction. The other spring element pair is compressed accordingly in a rotation in the opposite direction.

In this embodiment of the invention, therefore, the actual, realized via the leg spring damping, which also provides a centrifugal force respectively speed-dependent restoring force component, in addition to the circumferentially arranged spring elements 6 added.

7 finally shows a configuration in addition between the hub part 3 and the thigh 27 another spring component 31 again in the form of a helical spring 32 , provided that the provision of the leg spring 26 respectively of the thigh 27 supported.

LIST OF REFERENCE NUMBERS

1

A torsional vibration damper

2

driving part

3

internal gearing

4

Tilgermasseteil

5

ground ring

6

spring element

7

coil spring

8th

admission

9

Reset device

10

Return element

11

pivoting lever

12

swivel axis

13

outside

14

depression

15

depression

16

coupling element

17

Roll / ball

18

guideway

19

guideway

20

spring member

21

In stock

22

hub component

23

carrier

24

pivot

25

sliding piston

26

Leg spring

27

leg

28

guideway

29

role

30

In stock

31

spring member

32

coil spring

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19840664 A1 [0003]
• DE 102014223308 A1 [0003]

Claims (10)

Torsional vibration damper comprising a rotatable about a rotation axis drive part (2) and about the rotation axis relative to the drive part (3) rotatable Tilgermasseteil (4), characterized in that the Tilgermasseteil (4) via a restoring force of at least one compressed in a rotation spring element (6) and at least one centrifugally force-dependent restoring device (9) is generated, from a relative to the drive part (2) deflected position can be reset. Torsional vibration damper after Claim 1 , characterized in that the Tilgermasseteil (4) via at least one circumferentially acting spring element (6) is coupled and the return means (9) at least one centrifugally dependent radially movable return element (10) which is coupled to the Tilgermasseteil (4). Torsional vibration damper after Claim 2 , characterized in that the restoring element (10) is pivotally mounted or linearly movable and is coupled via a coupling element with the Tilgermasseteil (4). Torsional vibration damper after Claim 3 , characterized in that the return element (10) via at least one spring member (20) is stretched radially outward. Torsional vibration damper after Claim 4 , characterized in that on the return element (10) and / or on the Tilgermasseteil (8) has a curved guide track (18, 19) on which rolls as a roller (17) running coupling element. Torsional vibration damper after one of Claims 3 to 5 , characterized in that the return element (10) is designed as a pivoting lever (11) or as a linearly movable sliding piston (25). Torsional vibration damper after Claim 2 , characterized in that the restoring device (9) is a leg spring (26) arranged on the drive part (2) and which is in rolling motion with the absorber mass part (4) via a coupling roller (29) which rolls on a track (28) of the leg spring (26) ) is coupled. Torsional vibration damper after Claim 7 , characterized in that the spring element (6) is supported with one end on the drive part (2) and with the other end on the Tilgermasseteil (4). Torsional vibration damper after Claim 7 or 8th , characterized in that a further, the leg spring (26) with the the track (28) having portion radially outwardly exciting spring member (31) is provided. Torsional vibration damper according to one of the preceding claims, characterized in that a plurality of spring elements (6) are distributed around the circumference, which are at the same radius or at different radii and which are arranged in a plane or axially offset, and / or more around the circumference distributed reset means (9) are provided.

Images