DE102014212433A1 - stabilizer - Google Patents

Abstract

Stabilizer (10), in particular for a motor vehicle, comprising a Torsionsfederungselement (11), which has two rotational body, wherein the rotational body (14, 16) rotate in a relative rotation against each other and wherein the rotary body (14, 16) via at least one spring element (18) are rotationally interconnected, wherein the spring element (18) on contact areas (24, 26) of the rotary body (14, 16) rests. In addition, the contact areas (24, 26) of the rotary bodies (14, 16) in a defined state of Torsionsfederungselements (11) in which the abutment areas (14, 16) come to cover or overlap, axially or radially adjacent to each other or engage combed into each other.

Description

The invention relates to a stabilizer, in particular for a motor vehicle, according to the preamble of patent claim 1.

A generic stabilizer is in the DE 10 2009 006 385 A1 shown. Here, a split stabilizer is shown with a pivot motor, wherein the pivot motor two stabilizer halves rotatably connected to each other connects. One of these stabilizer halves is operatively connected via fittings with the swing motor. In this case, a small relative rotation between the stabilizer halves should be made possible with a fixed swivel motor in order to minimize interference excitations. The fittings are made of rubber and arranged in the circumferential direction between radially extending webs. However, a disadvantage is the aging process of the fittings with which the behavior of the stabilizer changes over time. Furthermore, the fittings have a large length in the axial direction. In addition, the shaped pieces are compressed and claimed only in a relative rotation in one direction.

It is therefore an object of the present invention to provide a simple, space-saving and compact stabilizer in the axial direction.

This object is achieved by means of the stabilizer according to the full claim 1. In the dependent claims advantageous embodiments of the invention are described.

The stabilization may, for example, constitute a roll stabilization, in particular for motor vehicles.

The rotational bodies are preferably arranged rotatable relative to one another about a common axis, wherein the at least one spring element produces an operative connection between the rotational bodies. As a result, they can perform a relative rotation to one another when a force acts, which depends inter alia on the spring elements. For this purpose, the rotation body favorably on the same axis of rotation. The spring element are arranged rotationally effective on the bodies of revolution and are thus acted upon in a relative rotation of the rotating body with a force and compressed.

The mentioned relative rotation can be caused, for example, by a force introduced into the stabilizer. Such a force can for example be introduced from the outside, for example by a spring movement of a wheel or by an actuator, as explained in more detail later. A rotational body, depending on where the force is introduced into the Torsionsfederungselement, act as a drive-side, force, or output side, power dissipation, rotating body.

For receiving and transmitting this force, the spring element in this case is associated with investment areas of the rotary body. During operation, the spring element can rest against the respective abutment region in contact, lose contact with the contact or receive the abutment contact.

The contact areas of the rotary bodies are axially or radially adjacent, in particular directly adjacent to each other, in particular in a defined state, when the contact areas of the rotary body come to cover. If the abutment areas are formed, for example, by planes or surfaces, the abutment areas of the various rotational bodies can essentially form a common area. This may for example be the case when the stabilizer is in a relaxed state. In the defined state, abutment areas are preferably arranged adjacent to one another, wherein the adjacent abutment areas are favorably assigned to the same spring element and act on this substantially at the same location or area and also in the same direction. The contact areas of the different rotation bodies are preferably next or first neighbors. Furthermore, there is the possibility that the abutment elements engage in one another in a comb-shaped or tooth-shaped manner. The comb-shaped design of the contact areas here represents essentially a simultaneously axially and radially adjacent arrangement of the contact areas.

With the described embodiments, a simple control of the spring elements can be achieved, which allows a compact design.

In a certain state of the stabilizer, for example when no force is introduced into the stabilizer, the abutment areas can preferably reach essentially to cover or cover. If the abutment areas are formed, for example, by planes, in particular by areas, then these abutment areas can essentially form a common plane or area, which is preferably free of shoulders or steps. In this particular state, the abutment areas can also be aligned parallel to one another. In an overlap, the investment areas can divide when viewed in the axial direction or in the direction of rotation of the rotating body. In this case, executed as planes or surfaces investment areas, for example, form a cutting edge. This is especially the case when the planes or faces can not take a parallel alignment. The particular state may also correspond to a certain relative rotation between the rotating bodies, which may only occur during operation of the stabilizer.

The Torsionsfederungselement is in this case designed such that its rigidity or elasticity can be relatively easily adapted to a variety of requirements. By selecting the rotational body and the spring elements, a simple adaptation to the installation space, as well as a desired rigidity of the stabilizer can be achieved. This is particularly advantageous if the space is small and a relatively high elasticity or low rigidity is needed. The usual use of tubes as a stabilizer leg separates at the here required high elasticity and low stiffness and small installation space, inter alia, due to the short life.

Conveniently, the spring element is designed as a helical spring or as a bow spring. When using coil springs a simple adjustment of the rigidity of the stabilizer in a variety of conditions is possible, for example by replacing the coil spring or the bow spring. As a result, even with a compact design, the torsional rigidity can be optimally adapted to the requirements.

Furthermore, the contact areas are preferably formed by webs, projections or steps. The webs, projections or steps extend advantageously in the radial direction.

In addition, it may be favorable if contact areas arranged radially adjacent to one another do not overlap in the radial direction or are formed without overlapping. In this case, for example, the radius of an outermost point of a radially inner abutment region is smaller than the radius of an innermost point of a radially outer abutment region. Similarly, it may also be appropriate to form two axially adjacent contact areas in the axial direction without overlapping.

Furthermore, it is proposed that axially adjacent contact areas overlap in the radial direction or that the radially adjacent contact areas overlap in the axial direction. Furthermore, it may be advantageous if the comb-shaped intermeshing contact areas overlap radially and axially.

In a favorable embodiment variant forms the Torsionsfederungselement, in particular one or both of the rotary body, a spring channel, in which the spring element is arranged. The spring channel is assigned at least one contact area per rotation body. Preferably, two abutment areas are assigned to the spring element per rotational body, whereby the spring element can be subjected to a rotation in a first direction and in a second direction. The investment areas can serve to limit the spring channel and complete this, for example in the circumferential direction.

In this case, the rotational bodies can be arranged radially and / or axially relative to one another, wherein the spring channel can be arranged radially and / or axially between the rotational body. In this case, the radially outer rotational body preferably forms a housing. However, both rotational bodies can also form a housing.

Furthermore, the spring channel can be largely, ie at least more than 50%, formed by one of the two rotating bodies.

Furthermore, it is proposed that one of the rotational bodies engages in the respective other rotational body or completely engages through this. In this case, preferably engages the radially inner rotary body in the radially outer or passes through this. As a result, the rotational bodies can be arranged against one another at at least two points, which are advantageously arranged axially spaced from one another via bearing elements, for example ball bearings. In this way, a defined orientation of the rotary body to each other can be achieved, which also allows a uniform and defined relative rotational movement.

It is proposed that the Torsionsfederungselement has a plurality of spring channels. The spring channels can be arranged in particular axially and / or radially to each other. Furthermore, the spring channels can be designed according to the statements on the individual spring channel. The radial and / or axial arrangement of the spring channels makes it possible to optimally adapt the stabilizer to the given installation space. In addition, it offers advantages when the load is divided among several spring elements.

Each of the spring channels can accommodate one or more spring elements. In this case, for example, a plurality of spring elements, in particular coil springs, in the circumferential direction one behind the other or else be arranged one inside the other.

It is also possible to arrange the contact areas in such a way that the rotational bodies of the stabilizer can first rotate relative to one another during a relative movement, before the spring elements apply a force. In this case, for example, a spring element only at record a contact angle with a corresponding contact areas of the two rotary body a certain angle of rotation and thus be subjected to force only from this angle of rotation and deliver a corresponding counterforce. The rotation within this free path is essentially free of force.

In addition, it is possible that in the case of several spring elements initially only a first part of the spring elements acts, wherein with increasing angle of rotation of the rotary body further spring elements can be switched on. As a result, the spring elements can be switched substantially in stages.

The free travel and the connection of other spring elements depending on the angle of rotation can be chosen freely and differently for each direction of rotation.

According to a preferred variant, a plurality of spring channels are arranged one behind the other in a circumferential direction. In this case, the spring channels can, for example, have substantially the same radius and the same axial position and be formed along this radius in the circumferential direction. Possible embodiments of the spring channels can be found in the previous and the following versions. By arranging a plurality of spring channels and, consequently, a plurality of spring elements in the circumferential direction, the load distributed over a plurality of spring elements can thus be reduced for the individual spring elements.

However, a single or a plurality of spring channels, which are arranged in the circumferential direction to each other, in this case need not be formed over the entire circumference, but may also be formed only over part of the entire circumference. It is also possible that different spring channels of the stabilizer and the spring elements have different lengths in the circumferential direction.

In one embodiment, the spring channel is straight, curved or circular. Here, the shape in a cross-sectional view is meant with a viewing direction in the axial direction or when looking in the direction of a rotation axis of the rotation elements. A helical spring, for example, would be straight, a bow spring arched or circular. In this case, the spring channel is preferably adapted to the shape of the spring element. This can provide advantages, inter alia, when using certain spring elements, for example in straight coil springs or bow springs.

Furthermore, it is proposed that the spring element is claimed in a relative rotation between the rotational bodies in a first and in a second rotational direction. As a result, the spring element is addressed in relative rotation in both directions or used for power transmission, whereby the load is evenly distributed to as many, preferably all spring elements. Furthermore, it is also possible to use a plurality of spring elements only in a first part of the spring elements a stress in a first direction of rotation and / or a second part of the spring elements in a second direction of rotation and / or in the remaining spring elements in both directions of rotation. Thereby, the rigidity in a first direction and in a second direction can be set independently.

Conveniently, an actuator is operatively connected to one of the rotary bodies and can apply or rotate this with a force. The actuator may be formed, for example, by an electric machine, in particular an electric motor. By the actuator, it is possible to actively influence the stabilizer, which depend inter alia on the arrangement of the stabilizer.

In a variant, the stabilizer effectively connects two wheels of a motor vehicle, which are arranged in particular in an axle arrangement with each other. In this case, in each case one of the rotary bodies can be operatively connected to one of the wheels, in particular firmly connected. Furthermore, an actuator can be arranged between a structure and the rotary body or between one of the rotary body and the associated wheel. A combination of the two variants with two actuators is also possible. This allows the stabilizer to be actively controlled.

A spring movement of the first wheel relative to a structure causes a rotational movement of the drive-side rotational body, wherein the spring element of the stabilizer exerts a force on the driven-side rotational body due to the rotation generated thereby between the rotational bodies. If necessary, the force exerted on the output-side rotational body leads to a rotational movement, which in turn results in a spring movement of the second wheel. The spring movement of the second wheel here corresponds essentially to the spring movement introduced into the first wheel. As a result, for example, a rolling motion of the motor vehicle can be reduced. An actuator which is arranged within the described force flow, as explained above, makes it possible to attenuate or even enhance the effect of the stabilizer.

Conveniently, the stabilizer with actuator effectively connects a wheel of the motor vehicle to the body of the motor vehicle. The actuator may in this case be arranged between the structure and one of the rotary bodies or between the wheel and one of the rotary bodies.

In an embodiment now explained, the housing of the actuator, for example, fixed to the structure and arranged with its output or output fixed to a first rotation body to apply this to the structure with a force or rotate. This first rotary body is further connected via the spring element with the second rotary body, which in turn is operatively connected to the wheel. A rotational movement of the output element generates a spring movement on the wheel, and vice versa. By using the actuator, a spring movement of the wheel can be actively influenced via the Torsionsfederungselement. Preferably, such a stabilizer with actuator is arranged on each wheel of the motor vehicle, which can actively influence, among other things rolling movements or pitching movements of the vehicle.

The method according to the invention is explained below by way of example with reference to the attached figures.

Show it:

1 an arrangement with a stabilizer;

2 another arrangement with the stabilizer;

3 the stabilizer in cross section;

4 the stabilizer off 1 in a loaded condition;

5 a detailed view of investment areas 1 ;

6 another embodiment of the investment areas 3 ;

7 a longitudinal section through a stabilizer;

8th a schematic representation of the formation of the spring elements in the stabilizer.

Hereinafter, equivalent means or equivalent components are given the same reference numerals.

The 1 shows an arrangement 50 with a stabilizer 10 for a motor vehicle. The stabilizer 10 is here about two stabilizer legs 52 with two wheels 54a , b operatively connected, wherein the two stabilizer legs 52 via a torsion suspension arrangement 11 are operatively connected to each other. The stabilizer legs are 52 via a bearing element 58 opposite to a construction 56 supported the motor vehicle. A spring movement of the first wheel 54a is doing about the stabilizer legs 52 and the stabilizer 10 on the second wheel 54 transfer. A compression movement of the first wheel 54a generated over the arrangement 50 and the stabilizer 10 a force on the second wheel 54b , whereby this is also stimulated to a compression movement. As a result, for example, rolling movements of the motor vehicle can be reduced. In this case, the motor vehicle may be preferably equipped on each axis with such a structure. The stabilizer 10 can be designed here with or without actuator and thus active or passive. In principle, it is also possible that an actuator between the Torsionsfederungsanordnung 11 and one of the stabilizer legs 52 is designed to actively influence the stabilizer.

Another variant is in 2 shown. Here is the stabilizer 10 on the one hand via the stabilizer leg 52 with the wheel 54 , as well as on the other hand with the structure 56 operatively connected. The stabilizer leg 52 is also in this embodiment of the construction 56 supported, for example via a bearing element 58 , This support over the structure 56 is optional. On the other hand, a housing of the actuator 12 of the stabilizer 10 stuck with the construction 56 connected. Next is the output or the output of the actuator 12 with the torsion suspension arrangement 11 of the stabilizer 10 and can be compared to the structure 56 rotate. The torsion suspension arrangement 11 is still with the stabilizer leg 52 connected. This arrangement 50 is on the motor vehicle preferably on each wheel 54 arranged. Using the actuator 12 can apply a force to the torsion suspension element 11 be applied, creating a spring movement of each wheel 54 can be actively influenced. Through the active control of the stabilizers 10 for every bike 54 can the construction 56 optimally stabilized. For example, rolling movements or pitching movements can be reduced, as well as the height or a level of the structure 52 be adapted to the road or the ground.

In the 3 and 4 is a stabilizer 10 shown in cross section. The torsion suspension element 11 is here by a first body of revolution 14 , a second body of revolution 16 and spring elements 18 educated. Here is the first rotation body 14 fixed to the output of an actuator 12 connected. The first rotation body 14 is still about spring elements 18 , here two spring elements 18 , with the second body of revolution 16 operatively connected. The second rotation body 16 is also fixed with a stabilizer leg 52 connected, in turn, with a wheel (in 3 not shown) is operatively connected. The stabilizer leg 52 can also be in one piece with the output element 16 be educated.

The spring elements 18 , in this case as bow springs 18 trained, here are in spring channels 22 disposed radially outward of the first rotary body 14 and radially inward of the second rotary body 16 , as well as in the circumferential direction of investment areas 24 . 26 are limited. In this case, the first body of revolution forms 14 also a housing. The investment areas 24 . 26 of the first body of revolution 14 and the second rotation body 16 are here by webs 28 . 30 educated. Here are the investment areas 24 . 26 through surfaces 24 . 26 educated. The spring elements 18 stand in direct contact with the investment areas 24 . 26 , This direct investment contact of the respective investment area 24 . 26 with the spring element 18 can during a relative rotation between the bodies of revolution 14 . 16 get lost.

In 3 in which the stabilizer is shown in an unloaded or relaxed state of the stabilizer, ie without force introduction into the Torsionsfederungselement 11 , get the investment areas 24 . 26 of the bridges 28 . 30 to cover and form essentially a single area. The 4 continues to show the same stabilizer 10 , in particular the Torsionsfederungselement 11 , which now has a force through the actuator 12 or the stabilizer leg 52 acts, which leads to a relative rotation between the bodies of revolution 14 . 16 leads. As a result, the webs 28 . 30 with the investment areas 24 . 26 deflected against each other and the spring elements 18 compressed. In a deflection in the reverse direction would also both spring elements 18 be compressed, reducing the load on both spring elements 18 is divided equally. It can also be seen that the indicated stabilizer leg 52 in comparison with 1 with the output element 16 with turns.

The 5 and 6 show two variants for the arrangement of the webs 28 . 30 , In 3 is the jetty 28 of the first body of revolution 14 axially laterally, in the figure behind the bridge 30 of the second rotation body 16 educated. The bridges 28 . 30 have substantially the same length in the radial direction. It is also easy to see that the axially adjacent webs 28 . 30 of the rotational body 14 . 16 overlap in the radial direction. In 5 is another representation of axially arranged abutment areas 24 . 26 shown.

The 6 shows, as already mentioned, another variant for the arrangement of the webs 28 . 30 , Here are the bars 28 . 30 radially adjacent, in particular as direct or first neighbors, arranged to each other. The bridges 28 . 30 Therefore, they overlap substantially in the axial direction, ie in the plane of the drawing.

A combination of in 5 and 6 presented options is also possible. The webs can 28 . 30 for example, tooth-shaped or comb-shaped interlock. Basically, this can also be an arbitrary prong profile.

The 7 shows a longitudinal section of a stabilizer 10 , in particular the Torsionsfederungselements 11 , along the points ABC the 3 , The actuator 12 is also shown here only schematically and fixed to the first body of revolution 14 connected. It can be seen that the stabilizer 10 here several spring channels 22 with several spring elements 18 and corresponding investment areas 24 . 26 having. Here are three spring channels 22 arranged axially to each other. In addition, the second body of revolution passes through 16 the first rotation body 14 in the axial direction and is by means of bearing elements 32 stored opposite this. In an upper area AB are the investment areas 24 . 26 shown, being on one of the spring channels 22 the arrangement of one of the spring elements 18 is indicated. The spring element 18 is in contact with two areas 24 of the first body of revolution 14 , as well as with an investment area 26 of the second rotation body 16 , The investment area 26 of the second rotation body 16 is here axially between the investment areas 24 of the first body of revolution 14 arranged. In addition, there are two spring elements each 18 with an axially internal contact area 24 of the first body of revolution 14 in contact. The axially inner abutment regions of a rotational body are here axially between two abutment regions of the other rotational body.

In a lower area BC the 7 is the arrangement of the spring elements 18 in the corresponding spring channels 22 shown. The spring elements 18 If necessary, can be radially outward on the spring channel 22 , here at the first rotation body 14 support. In addition, the spring channels 22 connected together or as a large spring channel 23 educated. However, it is also possible in principle, the spring channels 22 as individual rooms and this completely separated or even partially separated, ie the spring channels 22 are at least partially open to each other, train.

The 8th schematically shows various embodiments for the arrangement of several spring channels 22 or spring elements 18 in one stabilizer 10 , Only the spring elements are 18 circular and shown as a line. Group A shows spring elements 18 without subdivision. It is thus only a spring element 22 arranged on the corresponding radius and at the corresponding axial position. The spring element 18 is shown circumferentially over the entire circumference, wherein the spring element 18 basically also can be formed only over part of the circumference. To the right now increases the number of axially adjacent spring elements 18 , downwards, the number of radially arranged spring elements increases 18 , In a last variant shown in group A six spring elements are used. In each case two spring elements 18 arranged radially in a group, wherein the same group is arranged in a threefold embodiment axially to each other.

In the group B, a subdivision of the spring elements is shown, wherein in each case two spring elements are arranged in the circumferential direction to each other. The arrangement of further spring elements corresponds to that of group A. Group C further shows a subdivision into three spring elements in the circumferential direction. It is also basically possible to use several different subdivisions in a stabilizer and the corresponding spring elements 18 or spring channels 22 correspondingly radially and / or axially to each other. The groups and respective rows can be continued accordingly.

LIST OF REFERENCE NUMBERS

10

stabilizer

11

Torsionsfederungsanordnung

12

actuator

14, 16

body of revolution

18

spring element

22

spring channel

23

spring channel

24, 26

plant area

28, 30

web

32

bearing element

50

arrangement

52

stabilizer leg

54a, b

wheel

56

construction

58

bearing element

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 102009006385 A1 [0002]

Claims (12)

Stabilizer ( 10 ), in particular for a motor vehicle, comprising - a torsion suspension element ( 11 ), which has two rotational bodies, - wherein the rotational bodies ( 14 . 16 ) in a relative rotation can rotate against each other and - the rotational body ( 14 . 16 ) via at least one spring element ( 18 ) are rotationally connected to each other, - wherein the spring element ( 18 ) at investment areas ( 24 . 26 ) the rotating body ( 14 . 16 ), characterized in that the investment areas ( 24 . 26 ) the rotating body ( 14 . 16 ) in a defined state of the Torsionsfederungselements ( 11 ), in which the investment areas ( 14 . 16 ) come to cover or overlap, axially or radially adjacent to each other or comb-shaped interlock. Stabilizer ( 10 ) according to claim 1, characterized in that the spring element ( 18 ) is designed as a helical spring or as a bow spring. Stabilizer ( 10 ) according to claim 1 or 2, characterized in that the Torsionsfederungselement ( 11 ), in particular one or both bodies of revolution ( 14 . 16 ), a spring channel ( 22 . 23 ), in which the spring element ( 18 ) is arranged. Stabilizer ( 10 ) according to one of claims 1 to 3, characterized in that one of the rotary bodies ( 14 . 16 ) in the respective other rotational body ( 14 . 16 ) engages or passes through this completely. Stabilizer ( 10 ) according to one of claims 1 to 4, characterized in that the Torsionsfederungselement ( 11 ) several spring channels ( 22 . 23 ) having. Stabilizer ( 10 ) according to claim 5, characterized in that the spring channels ( 22 . 23 ) are arranged axially and / or radially to each other. Stabilizer ( 10 ) according to claim 5 or 6, characterized in that a plurality of spring channels ( 22 . 23 ) are arranged in a circumferential direction one behind the other. Stabilizer ( 10 ) according to one of claims 3 to 7, characterized in that the spring channel ( 22 . 23 ) is straight, curved or circular. Stabilizer ( 10 ) according to one of claims 1 to 8, characterized in that during a relative rotation of the rotary body ( 14 . 16 ) the spring element ( 18 ) is claimed in a first and in a second direction of rotation. Stabilizer ( 10 ) according to one of claims 1 to 9, characterized in that an actuator ( 18 ) with one of the rotary bodies ( 14 . 16 ) is operatively connected and this can apply a force and / or rotate. Stabilizer ( 10 ) according to one of claims 1 to 10, characterized in that the stabilizer ( 10 ) two wheels ( 54a , b) a motor vehicle, in particular in an axle assembly ( 52 ) are arranged, operatively connected together. Stabilizer ( 10 ) according to one of claims 1 to 11, characterized in that the stabilizer ( 10 ) a wheel ( 54a , b) the motor vehicle having a structure ( 56 ) of the motor vehicle.

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