DE102020211002B4 - bearing arrangement - Google Patents

Abstract

Bearing arrangement (9) for mounting a stabilizer section (2a, 2b) of a roll stabilizer (1) in relation to a body (7) of a motor vehicle, having a bearing body (10) in which a through hole (8) is formed, through which the stabilizer section (2a , 2b) so that the stabilizer section (2a, 2b) is mounted therein so that it can rotate about an axis of rotation (6) running through the through-hole (8), characterized in that the bearing body (10) is made of rubber material which has at least an insert (22, 23) with a circumferentially wavy profile, i.e. a profile that deviates from an imaginary circular path in a wavy manner, in that it assumes periodically wavy-changing distances from the axis of rotation (6) over the circumference.

Description

The invention relates to a bearing arrangement for mounting a stabilizer section of a roll stabilizer relative to a body of a motor vehicle according to claim 1. The invention also relates to a roll stabilizer for a motor vehicle according to claim 15.

From motor vehicle technology, in particular chassis technology, it is known per se to equip motor vehicles with a so-called roll stabilizer in order to increase vehicle stability and driving comfort. In general, this is a substantially C-shaped torsion bar which is rotatably mounted in the central area by means of one, usually several bearings relative to the vehicle body of the motor vehicle and whose outer, opposite ends are each coupled to a wheel suspension. With this construction, the roll stabilizer ensures that the body of the vehicle not only deflects on the outer side when cornering (caused by the centrifugal force), but also that the inside wheel is lowered slightly. To connect the roll stabilizer to the vehicle body, bearings are used that allow the roll stabilizer to rotate about an axis of rotation relative to the vehicle body. There can be very high demands on the bearings, especially with regard to their rigidity in the radial and axial direction, while the softest possible characteristic values are sought with regard to torsion around the axis of rotation. On the one hand, the high mechanical requirements speak in favor of using a roller or plain bearing. On the other hand, elastomer bearings (rubber bearings) offer advantages in terms of acoustics and driving comfort due to their damping properties.

Out of DE 10 2015 212 005 A1 , U.S. 2012/0 299 261 A1 , U.S. 2011/0 291 377 A1 such as DE 10 2007 024 741 A1 each bearing arrangements according to the features of the preamble of claim 1 are known.

It is an object of the present invention to specify a bearing arrangement of the type mentioned at the outset which, compared to the known bearing arrangement, has improved rigidity in the axial and radial directions, but is torsionally soft and which can be produced inexpensively.

The object is achieved by a bearing arrangement according to the features of claim 1. It is a bearing arrangement for mounting a stabilizer section of a roll stabilizer relative to a body of a motor vehicle. The bearing arrangement has a bearing body in which a through hole is formed, through which the stabilizer section is guided, so that the stabilizer section is mounted therein so that it can rotate about an axis of rotation running through the through hole. According to the invention, the bearing arrangement is characterized in that the bearing body is made of a rubber material that is reinforced by at least one insert with a circumferentially wavy course, i.e. a course that deviates from an imaginary circular path in a wavy manner by periodically changing the distances to the axis of rotation in a wavy manner over the course of the circumference.

The design according to the invention is initially based on the object of specifying a bearing arrangement which has a high degree of rigidity both in the radial and in the axial direction, but achieves torsional soft characteristic values. In principle, it has been found that rubber mounts have advantages for such mount arrangements, since they have dampening properties (improved acoustics, high driving comfort) and can be produced relatively inexpensively. According to the invention, it was first seen that a bearing body made of rubber material with inserts contained therein, in particular metallic inserts, has increased rigidity compared to a pure rubber bearing with the same size. In addition, a special design of the insert was considered to be particularly advantageous for the application described here of mounting a stabilizer section of a roll stabilizer. Since at least one insert has a circumferentially wavy profile, the bearing body is given relatively high radial and axial rigidity, while its torsional rigidity remains relatively low, in other words it increases relatively little. According to initial findings, the reason for this could be the wave shape of the insert, which deviates from the circular shape, which may lead to the torsional moments ("peripheral forces") occurring in the bearing body being passed on less directly, which facilitates the torsion of the bearing body and thus its torsional rigidity is low holds. The task mentioned at the outset is thus achieved.

The bearing body is advantageously reinforced by a plurality of inserts running around the circumference, of which at least two inserts have different radial distances from the axis of rotation. In order to achieve high levels of rigidity in all radial directions and in the axial direction, it is therefore provided that the rubber material of the bearing body is reinforced by a number of inserts. An insert is an element that is surrounded by rubber material and, due to mutual form fit, force connection and/or material connection increases the rigidity of the bearing body. For this purpose, the inserts run in the circumferential direction, that is to say they extend in a circumferential direction around the axis of rotation, with the extension not necessarily covering the entire circumference, but alternatively covering part of the circumference. In order to achieve a particularly high rigidity of the bearing body, it can be provided that at least two of the inserts have different radial distances from the axis of rotation.

The bearing arrangement can vary in terms of geometry, dimensions, number of inserts or other design features.

According to an advantageous development of the idea of the invention, a first insert has a first radial distance from the axis of rotation, while a second insert has a second radial distance from the axis of rotation, which is greater than the first insert. The expression “a first insert” is to be understood in such a way that it means a group of at least one insert with the first radial distance from the axis of rotation. Correspondingly, the bearing arrangement can advantageously also have a plurality of first inserts with this first radial distance from the axis of rotation. The term “second insert” is to be understood in the same way, according to which there can advantageously also be a plurality of second inserts, each of which has in common a second equal radial distance from the axis of rotation. The bearing arrangement can therefore advantageously have a plurality of first inserts and a plurality of second inserts, the first inserts having the first radial spacing and the second inserts having the second radial spacing, which is greater than the first spacing, from the axis of rotation.

A further advantageous embodiment provides that the bearing arrangement has, in addition to a second insert with a second radial distance from the axis of rotation (also) a third insert with a third radial distance from the axis of rotation that is greater than the second insert. Here, too, the term “a third insert” should be understood to mean that at least one insert is involved with this third radial distance from the axis of rotation, with several such inserts also being able to be used.

In general, the arrangement of several inserts with different radial distances to the axis of rotation creates a structurally relatively simple possibility of increasing the rigidity of the bearing arrangement in the radial and axial direction while ensuring adequate damping.

Advantageously, at least two inserts with different radial distances from the axis of rotation, in particular at least one second insert and at least one third insert, have a circumferential wave-like course.

The inserts used according to the invention can be designed and arranged in different ways. At least one insert can advantageously be curved in the axial direction. It has been shown that an insert that is curved in the axial direction has a positive effect on the flow of forces within the bearing arrangement.

According to one conceivable embodiment, it can be provided that the bearing body of the bearing arrangement is reinforced by exactly one first insert, exactly one second insert and optionally exactly one third insert. The bearing body is particularly advantageously reinforced by at least two first inserts. In this case, a first insert can extend, for example, around a partial peripheral area, while a further first insert can extend around a further partial peripheral area within the bearing body. In a comparable way, the bearing body can advantageously be reinforced by at least two second inserts. In a comparable manner, the bearing body can advantageously be reinforced by at least one third insert or by at least two third inserts.

Various materials can be used for an insert used according to the invention. One or more, in particular all, of the inserts are preferably made of metal, in particular of aluminum.

With regard to the geometric design, a preferred development of the bearing arrangement provides that inserts with the same radial distance from the axis of rotation together form an imaginary ring body - possibly interrupted by a division of the bearing body - i.e. extend completely around the axis of rotation through the bearing body.

In order to achieve a form fit between the rubber material and the insert that increases the rigidity of the bearing body, a preferred further development provides that a passage penetrated by the rubber material is formed in at least one of the inserts.

Basically it is conceivable that the bearing body is in one piece. Improved manufacturability, in particular assembly, on the stabilizer section results from the fact that the bearing body is divided into two bearing sections. Preferably he can The bearing body can be divided into a bearing section facing the body (of the motor vehicle) and a bearing section facing away from the body (of the motor vehicle). A geometrically simple design results if the bearing section facing the structure and the bearing section facing away from the structure are constructed identically, so that the bearing body formed from the two bearing sections has a basic shape that is essentially rotationally symmetrical with respect to the axis of rotation.

The object mentioned at the outset is also achieved by a roll stabilizer for a motor vehicle according to the features of claim 15. It is a roll stabilizer for a motor vehicle which is connected to at least one stabilizer section by means of a bearing arrangement of the type described above which encompasses the stabilizer section of the motor vehicle can be mounted so as to be rotatable about an axis of rotation. The roll stabilizer can be a passive roll stabilizer that has been known per se for a long time. Alternatively, it can be an adjustable roll stabilizer, ie a so-called active roll stabilizer, comprising an actuator and two stabilizer sections that can be rotated relative to one another about the axis of rotation with the aid of the actuator. With regard to the bearing arrangement used, reference is made to the relevant description.

• 1 einen verstellbaren Wankstabilisator eines Kraftfahrzeugs in schematischer Ansicht,
• 2 einen Teil eines verstellbaren Wankstabilisators, insbesondere einen Stabilisatorabschnitt, der von einer diesen umgreifenden Lageranordnung gegenüber einem Aufbau eines Kraftfahrzeugs drehbar gelagert ist,
• 3 eine Lageranordnung zur Lagerung eines Stabilisatorabschnitts in Schnittdarstellung,
• 4 drei Einleger einer erfindungsgemäßen Lageranordnung gemäß einem Ausführungsbeispiel der Erfindung in perspektivischer Ansicht,
• 5 die drei Einleger aus 4 in Ansicht aus Axialrichtung.

The invention is explained in more detail below with reference to an exemplary embodiment illustrated in a drawing. This also results in further advantageous effects of the invention. In the drawing shows:

• 1 an adjustable roll stabilizer of a motor vehicle in a schematic view,
• 2 a part of an adjustable roll stabilizer, in particular a stabilizer section, which is rotatably mounted by a bearing arrangement encompassing it relative to a body of a motor vehicle,
• 3 a bearing assembly for mounting a stabilizer section in a sectional view,
• 4 three inserts of a bearing arrangement according to the invention according to an embodiment of the invention in a perspective view,
• 5 the three depositors 4 when viewed from the axial direction.

1 shows an adjustable roll stabilizer 1 in a schematic view to illustrate the field of application of the invention. The adjustable roll stabilizer 1 is part of a chassis (not shown in full) of a motor vehicle (also not shown). A left wheel 3a and a right wheel 3b arranged on the opposite side of the vehicle are each connected to a body 7 of the motor vehicle via a wheel suspension 4a or 4b. Each of the wheel suspensions 4a, 4b is coupled to one end of an associated stabilizer section 2a, 2b of the adjustable roll stabilizer 1. The two stabilizer sections 2a and 2b are connected to one another via an actuator device 5 approximately in the center of the vehicle.

In an installed state on the motor vehicle, the roll stabilizer 1 is mounted in a manner known per se so that it can rotate about an axis of rotation 6 with respect to the structure 7 of the motor vehicle. Two bearing arrangements 9, designed as elastomeric bearings, are used for storage on both sides of the actuator device 5, which support the stabilizer section 2a or the stabilizer section 2b so that they can rotate about the axis of rotation 6 with respect to the vehicle body 7. The actuator device 5, shown here in simplified form as a cylindrical body, essentially comprises a housing and an electric motor housed therein and a gear mechanism with an output shaft housed therein. The stabilizer sections 2a and 2b are drive-connected to one another via the electric motor and the transmission. When the electric motor is stationary, the two stabilizer sections 2a, 2b are connected to one another in a torque-proof manner via the actuator device 5. By operating the electric motor, the stabilizer sections 2a, 2b can be rotated relative to one another about the axis of rotation 6, depending on the direction of rotation of the electric motor, in order to adjust the adjustable roll stabilizer 1 in a manner known per se.

2 shows an enlarged view of part of an adjustable roll stabilizer, for example one as in 1 schematically illustrated adjustable roll stabilizer 1. The representation in 2 it can be seen that the stabilizer section 2b is rotatably mounted about a rotation axis 6 by means of a bearing arrangement 9 which encompasses the stabilizer section 2b in a partial area in relation to a structure of a motor vehicle indicated by the reference number 7 . The bearing arrangement 9 can be a bearing arrangement according to the invention based on the 4 and 5 act described embodiment.

In 3 a bearing assembly 9 (not according to the invention) is shown in a sectional view to explain the basic structure. The bearing arrangement 9 has a bearing body 10 with a substantially rotationally symmetrical basic shape, which is made of a rubber material. In the rotationally symmetrical bearing body 10 A through hole 8 is formed with a circular cross section through which the stabilizer portion 2 b is passed so that the stabilizer portion 2 b is supported therein about a rotation axis 6 passing through the through hole 8 .

The bearing body 10 can be divided in half into two identical bearing sections (in 3 only one of the two can be seen), which complement each other in the shape of half shells to form a ring body divided by a parting plane. In an installed state on the motor vehicle, a first bearing section can face the structure 7 of the motor vehicle, while a second bearing section faces away from the structure 7 of the motor vehicle.

As 3 can be seen, the bearing body 10 includes a plurality of inserts 11, 12, 13, each having different radial distances to the axis of rotation 6 with respect to this. A first insert 11 (inner insert) has a first, smallest radial distance from the rotating object 6 . A second insert 12 (central insert) has a second, average radial distance from the axis of rotation 6 that is greater than the first radial distance from the axis of rotation 6 . A third insert 13 (outer insert) has a third, greatest radial distance from the axis of rotation 6, which is greater than the second radial distance from the axis of rotation 6.

All inserts 11, 12, 13 each extend partially around the circumference of the bearing body 10 in order to reinforce it. All of the inserts 11, 12 and 13 are made of aluminum.

Each of the two structurally identical bearing sections is assigned a first insert 11, a second insert 12 and a third insert 13, so that two first inserts 11, two second inserts 12 and two third inserts 13 are installed in the bearing body 10.

Like the sectional view of 3 as can be seen, the first inserts 11 have a straight extension, ie parallel to the axis of rotation 6 . In contrast to this, the second inserts 12 and the third inserts 13 are curved in the axial direction, with the curvature of the third inserts 13 being greater than the curvature of the second inserts 12.

Passages 20 are formed in the first inserts 11 and are penetrated by the rubber material of the bearing body 10 . The inserts 12, 13 can also have such passages and be penetrated by the rubber material of the bearing body 10.

The bearing body 10 has a fastening groove 21 on its outer circumference. The fastening groove 21 serves to fasten the bearing body 10 in relation to the structure of the motor vehicle by means of a bearing clamp (not shown) attached on the outer circumference.

In the 4 and 5 three inserts 11, 22, 23 are shown, which according to the invention in the form and arrangement shown in a as in 3 Bearing body 10 shown - as an alternative to the inserts 11, 12, 13 present there - can be used. The in the 4 and 5 The inserts 11, 22, 23 shown are assigned to a bearing section 16 of the bearing body 10, the bearing body 10 consequently having a bearing section 15 and a bearing section 16 each with one of the inserts 11, 22, 23, i.e. a total of two first inserts 11, two second inserts 22 and two third inserts 23 is reinforced.

Like the 4 and 5 as can be seen, the first inserts 11 have an equidistant profile relative to the axis of rotation 6, ie a part-circular profile. In contrast, second inserts 22 and third inserts 23 have a circumferentially wavy course, ie a course that deviates from an imaginary circular path in a wavy manner by periodically changing in a wavy distance from the axis of rotation 6 over the circumferential course. The wave crests and wave troughs of the second insert 22 and third insert 23 lie one above the other, ie have no phase shift relative to one another in the circumferential direction, but run in phase.

As in 4 As can be seen, six passages 20 are formed at least in the inner insert 11 according to the exemplary embodiment shown, through which the rubber material of the bearing body 10 passes in the assembled state of the bearing arrangement. Similar to the in 3 Bearing arrangement shown (with inserts 12, 13), the second insert 22 and third insert 23 according to the invention in the axial direction on a curvature. The curvature of the third insert 23 is more pronounced than the curvature of the second insert 22. The first insert 11 has no such curvature.

Reference List

1

adjustable roll stabilizer

2a, 2b

stabilizer section

3a, 3b

wheel

4a, 4b

suspension

5

actuator device

6

axis of rotation

7

vehicle body

8th

through hole

9

storage facility

10

bearing body

11

first depositor

12

second depositor

13

third depositor

15

body-side bearing section

16

bearing section facing away from body

20

passage

21

mounting groove

22

second (wavy) insert

23

third (wavy) insert

Claims (15)

Bearing arrangement (9) for mounting a stabilizer section (2a, 2b) of a roll stabilizer (1) in relation to a body (7) of a motor vehicle, having a bearing body (10) in which a through hole (8) is formed, through which the stabilizer section (2a , 2b) so that the stabilizer section (2a, 2b) is mounted therein so that it can rotate about an axis of rotation (6) running through the through-hole (8), characterized in that the bearing body (10) is made of rubber material which is characterized by at least an insert (22, 23) with a circumferentially wavy profile, i.e. a profile that deviates from an imaginary circular path in a wavy manner, in that it assumes periodically wavy-changing distances from the axis of rotation (6) over the circumference. bearing arrangement claim 1 , characterized in that the bearing body (10) is reinforced by a plurality of circumferential inserts (11, 22, 23), of which at least two inserts (11, 22, 23) have different radial distances from the axis of rotation (6). bearing arrangement claim 1 or 2 , characterized in that a first insert (11) has a first radial distance from the axis of rotation (6), while a second insert (22) has a second, compared to the first insert (11) greater radial distance from the axis of rotation (6). Bearing arrangement according to one of the preceding claims, characterized in that a second insert (22) has a second radial distance from the axis of rotation (6), while a third insert (23) has a third radial distance from the axis of rotation, which is greater than the second insert (22). (6) has. Bearing arrangement according to one of the preceding claims, characterized in that at least two inserts (22, 23) with different radial distances from the axis of rotation (6), in particular at least one second insert (22) and at least one third insert (23), have a circumferential wave-like course exhibit. Bearing arrangement according to one of the preceding claims, characterized in that at least one insert (22, 23) is curved in the axial direction. Bearing arrangement according to one of the preceding claims, characterized in that the bearing body (10) is reinforced by at least two first inserts (11). Bearing arrangement according to one of the preceding claims, characterized in that the bearing body (10) is reinforced by at least two second inserts (22). Bearing arrangement according to one of the preceding claims, characterized in that the bearing body (10) is reinforced by at least two third inserts (23). Bearing arrangement according to one of the preceding claims, characterized in that one, several or all of the inserts (11, 22, 23) are made of metal, in particular aluminum. Bearing arrangement according to one of the preceding claims, characterized in that inserts (11, 22, 23) with the same radial distance to the axis of rotation (6) together form an imaginary ring body - optionally interrupted by a division of the bearing body (10), i.e. over the entire circumference extend around the axis of rotation (6) through the bearing body (10). Bearing arrangement according to one of the preceding claims, characterized in that in at least one of the inserts (11, 22, 23) a passage (20) penetrated by the rubber material is formed. Bearing arrangement according to one of the preceding claims, characterized in that the bearing body (10) is divided into two bearing sections, in particular a bearing section (15) facing the structure (7) and a bearing section (16) facing away from the structure (7). bearing arrangement Claim 13 , characterized in that the bearing section (15) facing the body (7) and the bearing section (16) facing away from the body (7) are constructed identically, so that the bearing body (10) formed from the two bearing sections (15, 16) relates to a on the axis of rotation (6) has a substantially rotationally symmetrical basic shape. Roll stabilizer (1) for a motor vehicle which, with at least one stabilizer section (2a, 2b) by means of a bearing arrangement (9) encompassing the stabilizer section (2a, 2b) according to one of the preceding claims, is connected to a superstructure (7) of the motor vehicle about an axis of rotation (6th ) can be rotated.

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