DE102019006967A1 - Elastomer bearing - Google Patents

Abstract

The invention relates to an elastomer bearing (2). According to the invention, the elastomer bearing (2) comprises an outer bearing shell (3) in which an elastomer ring (4) is arranged, a sleeve (5) being arranged in an inner passage opening of the elastomer ring (4) and an inner bearing shell (6) is arranged between the sleeve (5) and the elastomer ring (4) over its entire circumference and at least in sections in the direction of the opening.

Description

The invention relates to an elastomer bearing.

From the prior art, as in the DE 202 02 241 U1 described an elastomeric joint known. The elastomer joint, in particular for chassis parts of motor vehicles, comprises a housing, an elastomer body arranged in the housing and a joint body which is arranged in the elastomer body. The housing has a cylindrical inner wall. A spacer element is provided, which is arranged at an axial end of the elastomer body between the latter and the inner wall.

The invention is based on the object of specifying an improved elastomer bearing compared to the prior art.

The object is achieved according to the invention by an elastomer bearing with the features of claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

An elastomer bearing according to the invention comprises an outer bearing shell, in which an elastomer ring is arranged, a sleeve being arranged in an inner passage opening of the elastomer ring and an inner bearing shell being arranged at least in sections between the sleeve and the elastomer ring and in the direction of the opening opening.

In the solution according to the invention, the sleeve is thus not arranged directly in the elastomer ring, in particular the elastomer ring is not vulcanized onto the sleeve, but the sleeve is arranged in the inner bearing shell and is thus spaced apart from the elastomer ring via the inner bearing shell. In particular, there is no integral connection between the elastomer ring and the sleeve. The sleeve is thus advantageously in the inner bearing shell about its longitudinal axis, i. H. about its axis of rotation, in particular axis of rotational symmetry, rotatably supported, in particular, at least with the exception of the friction between the sleeve and the inner bearing shell, freely rotatable. This friction is advantageously reduced by a lubricant, in particular grease, between the sleeve and the inner layer shell. This inventive design of the elastomer bearing thus forms a joint in the elastomer bearing, i. H. the elastomer bearing according to the invention has an integrated joint.

The elastomer bearing according to the invention can be used, for example, in the chassis area of vehicles or in other areas of vehicles or on other machines or devices. For example, the elastomer bearing according to the invention can be used for a strut or a control arm, in particular axle control arm, of a vehicle, in particular the chassis area of a vehicle. In particular in the chassis technology of vehicles, elastomer bearings with a vulcanized-on metallic outer ring and inner core have been used so far to have a favorable influence on the comfort properties of vehicles. The outer ring and the inner core are firmly, in particular cohesively, connected to the elastomer. As a result, the undesired secondary spring rates from torsion and cardanic flow into an overall spring rate of the vehicle, in particular of the respective wheel suspension area of the vehicle, since the torsion and cardanic movements, i. H. in particular by rotations about a rotational symmetry axis of the core and by pivoting movements deviating from this rotational symmetry axis, the elastomer is elastically deformed and thereby acts as an additional spring element. This design contradiction with regard to the spring rates of the vehicle is eliminated by the solution according to the invention, since the elastomer ring is decoupled from the torsional movements of the sleeve, in particular, by means of the inner layer shell and therefore no longer acts as an additional spring element.

The solution according to the invention thus enables a targeted design of a comfort and driving dynamics behavior of the vehicle. In particular, the solution according to the invention reduces the secondary spring rates in the overall chassis of the vehicle. The solution according to the invention is particularly advantageous in the case of multi-link axles, since a correspondingly large number of elastomer bearings are used here, which so far have produced corresponding secondary spring rates which are avoided with the solution according to the invention.

Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

• 1 schematisch eine Schnittdarstellung eines in einem Bauteil angeordneten Elastomerlagers, und
• 2 schematisch eine perspektivische Darstellung eines Bauteils mit zwei Elastomerlagern.

Show:

• 1 schematically shows a sectional view of an elastomer bearing arranged in a component, and
• 2nd schematically shows a perspective view of a component with two elastomer bearings.

Corresponding parts are provided with the same reference symbols in all figures.

1 shows schematically a sectional view of a in a component 1 arranged elastomer bearing 2nd . 2nd shows a perspective Representation of this component 1 with two elastomer bearings 2nd . For the component shown here 1 it is, for example, a transverse strut, for example a wishbone, of a vehicle, in particular a chassis of the vehicle.

Previously known elastomer bearings for vehicle chassis consist of a metallic outer ring vulcanized onto an elastomer element and an inner core. Due to this integral connection of the elastomer element with the outer ring and the inner core, unwanted secondary spring rates from torsion and gimbals flow into an overall spring rate, since torsional loads and cardanic loads on the inner core and / or the outer ring are transmitted to the elastomer element due to this integral connection and become an elastic one Deform the elastomer element. The elastomer element thus acts on the chassis of the vehicle as an additional spring element with secondary spring rates that are actually not provided and are not desired or at least difficult to include in a spring and damping configuration of the chassis.

The following, especially based on 1 described elastomer bearing 2nd avoids these disadvantages of previously known elastomer bearings 2nd and thereby resolves the described design contradiction with regard to the spring and damping design. This elastomeric bearing 2nd includes an outer cup 3rd in which an elastomer ring 4th is arranged, being in an inner passage opening of the elastomer ring 4th a sleeve 5 is arranged and being between the sleeve 5 and the elastomer ring 4th an inner bearing shell at least in sections and in the direction of the opening, in particular in the y-direction y of a three-dimensional coordinate system 6 is arranged.

The sleeve 5 is in the inner cup 6 rotatably supported, in particular rotatably about its longitudinal axis, in particular rotational axis, in particular rotational symmetry axis. This longitudinal axis corresponds to the y-axis y of the in 1 shown three-dimensional coordinate system. To reduce friction between the sleeve 5 and the inner bearing shell 6 is the elastomer bearing 2nd , in particular a space between the sleeve 5 and inner bearing shell 6 , advantageously filled with a lubricant, especially with fat.

The sleeve 5 and the inner cup 6 thus form a joint. The elastomer bearing 2nd thus has an integrated joint. In particular, there are torsional movements of the sleeve 5 about its longitudinal axis, ie about the y-axis y, relative to the inner bearing shell 6 and thus relative to the elastomer ring 4th enables, without thereby the elastomer ring 4th deform elastically, creating the elastomer ring 4th does not act as an additional spring element and thus corresponding secondary spring rates can be avoided.

The lubricant, especially grease, in the elastomer bearing 2nd to hold and the inside of the elastomeric bearing 2nd To protect against the ingress of water and dirt, side edge areas of the elastomer ring are expediently located 4th sealing on the sleeve 5 , ie on the circumference of the sleeve 5 , on. The elastomer ring 4th is not cohesive with the sleeve in these areas 5 connected, in particular not vulcanized, but only positively and / or non-positively to the sleeve 5 connected, in the example shown by corresponding bracket shapes 7 , 8th the sleeve 5 and the elastomer ring 4th for positive connection, but advantageously only for positive connection in the longitudinal direction of the sleeve 5 , ie in the direction of the y-axis y, and, by the full arrangement of the elastomer ring 4th on the sleeve 5 , of course also in the radial direction, ie in the X direction x and Z direction z, but advantageously not in the circumferential direction. That is, the sealing connection of the side edge areas of the elastomer ring 4th with the sleeve 5 allows the sleeve to be rotated 5 about its longitudinal axis relative to the elastomer ring 4th , in particular also relative to the side edge areas of the elastomer ring 4th , especially without the elastomer ring 4th thereby deforming elastically. For the sealing contact of the side edge areas of the elastomer ring 4th on the sleeve 5 In the example shown, a clamping ring must also be ensured on each side edge area 9 provided which the side edge area to the sleeve 5 sealingly pressed.

In the advantageous embodiment shown, the sleeve is 5 formed as a spherical sleeve and the inner bearing shell 6 is designed as a spherical shell. The sleeve designed as a spherical sleeve 5 has a spherical section around its circumference 10th on, ie a spherical or more precisely spherical segment-shaped thickening of the circumference. The inner bearing shell designed as a spherical shell 6 is to accommodate this spherical section 10th the sleeve designed as a spherical sleeve 5 educated.

Furthermore, the elastomer bearing 2nd in the advantageous embodiment shown, an inner part 11 and an outer part 12th of a sleeve housing. This inner part 11 and outer part 12th are between the inner bearing shell 6 and the elastomer ring 4th arranged. They serve in particular the inner bearing shell 6 hold in place. This is the inner part 11 of the sleeve housing on an outside of the inner bearing shell 6 arranged and the outer part 12th the sleeve housing is on an outside of the inner part 11 of the sleeve housing and thus between the inner part 11 of the sleeve housing and the elastomer ring 4th arranged.

For lateral stabilization, especially around the inner bearing shell 6 also laterally, ie in the longitudinal axis direction of the sleeve 5 to keep in position are also locking rings 13 provided, ie one locking ring each 13 on each side. The outer part 12th of the sleeve housing is around an outer edge of the locking rings 13 flanged to form a firm and stable unit from the inner bearing shell 6 , Inner part 11 and outer part 12th of the sleeve housing and the locking rings 13 to train.

The lock rings 13 also serve to limit a joint angle, in particular in the case of cardanic movements, ie in particular in the case of movements of the sleeve 5 deviating from the torsion about its longitudinal axis, ie around the y-axis y, in particular when moving in the direction of the x-axis x and / or z-axis z, and they then serve to return to the starting position. These gimbal movements, in particular in the direction of the x-axis x and / or z-axis z, are particularly due to the design of the sleeve 5 as a ball sleeve and the inner bearing shell 6 made possible as a spherical shell to a limited extent.

However, since excessive gimbal movements are not desired, they are particularly effective thanks to the two locking rings 13 limited. These cardanic movements also take place against the elastomer ring 4th , ie the elastomer ring 4th elastically deformed, so that these gimbal movements, which are actually not desired or only to a limited extent, counter to one caused by the elastomer ring 4th generated counterforce. In contrast, the torsional movements take place about the longitudinal axis of the sleeve 5 , ie around the y-axis y, due to the design of the elastomer bearing described above 2nd unimpeded, in particular without counterforce, apart from the friction between the sleeve, which is advantageously reduced by the lubricant 5 and inner bearing shell 6 , but at least without one through the elastomer ring 4th created drag.

The assembly of the elastomer bearing 2nd is done, for example, by the sleeve 5 into the inner cup 6 is used, the inner part 11 of the sleeve housing, the locking rings 13 and the outer part 12th of the sleeve housing and the outer part 12th of the sleeve housing around the locking rings 13 is flanged. This composite can then in the elastomer ring 4th are used, on which before or after the outer bearing shell 3rd is arranged, for example vulcanized.

Furthermore, are advantageously on the side of the sleeve 5 Adapter washers 14 arranged, ie one adapter disk each 14 on the respective face of the sleeve 5 . These adapter discs 14 serve in particular to reduce surface pressure on the sleeve 5 to the sleeve 5 during assembly of the component 1 , here the strut, by means of the elastomer bearing 2nd on a further component not shown here, for example on a vehicle chassis, not to be damaged by excessive forces, for example during screwing. For fastening, for example, a screw or a bolt is in the sleeve 5 , ie in an inner cavity of the sleeve 5 , insertable, with the sleeve 5 and the adapter washers 14 protruding areas of the screw or the bolt then serve the connection to the further component, for example to the vehicle chassis.

That is, the elastomer bearing 2nd which in the component 1 , for example the strut, is arranged, in particular in an eye of the component 1 , can then be screwed to the further component, for example to the vehicle chassis, whereby the two components 1 by means of the elastomer bearing 2nd are connected to each other. The arrangement of the elastomer bearing 2nd in the component 1 , in particular in its eye, can be done, for example, by pressing. For this, the outer bearing shell 3rd have an oversize, for example. The outer bearing shell 3rd is for example on the elastomer ring 4th vulcanized.

The adapter discs 14 are also advantageously components of a modular system with a plurality of variants of adapter disks 14 . This can cause the elastomer bearing 2nd for example, for various other components, for example different vehicle chassis. The adapter discs used in each case 14 for example on the sleeve 5 pressed on.

Through the elastomer bearing described here 2nd gimbal and torsional disturbance variables are thus reduced during a gimbal deflection and during a compression and rebound process of the vehicle. Driving comfort and driving dynamics of the vehicle are achieved by decoupling the elastomer bearing 2nd with integrated joint by means of an elastomer track on the outer sleeve housing, ie on the outer part 12th of the sleeve housing, improved. Furthermore, the reduction of the secondary spring rate enables a specific adjustment of a suspension spring and a damper of a respective wheel suspension of the vehicle.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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.

Patent literature cited

• DE 20202241 U1 [0002]

Claims (6)

Elastomer bearing (2), characterized by an outer bearing shell (3) in which an elastomer ring (4) is arranged, a sleeve (5) being arranged in an inner passage opening of the elastomer ring (4) and wherein between the sleeve (5) and the elastomer ring (4) is arranged in its entirety and in the feed-through opening direction, at least in sections, an inner bearing shell (6). Elastomer bearing (2) after Claim 1 , characterized in that the sleeve (5) is designed as a spherical sleeve which has a spherical section (10) all around the sleeve (5), and the inner bearing shell (6) as a spherical shell for receiving the spherical section (10) of the spherical sleeve is trained. Elastomer bearing (2) according to one of the preceding claims, characterized in that side edge regions of the elastomer ring (4) lie sealingly against the sleeve (5) and are connected to the sleeve (5) in a form-fitting and / or non-positive manner. Elastomer bearing (2) according to one of the preceding claims, characterized in that an inner part (11) and an outer part (12) of a sleeve housing are arranged between the inner bearing shell (6) and the elastomer ring (4). Elastomer bearing (2) according to any one of the preceding claims, characterized in that a locking ring (13) is arranged on the side of the inner bearing shell (6) and the inner part (11) of the sleeve housing, the outer part (12) of the sleeve housing around an outer edge of the Locking rings (13) is flanged. Elastomer bearing (2) according to one of the preceding claims, characterized in that an adapter disk (14) is arranged on each side of the sleeve (5).

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