DE102020116561A1 - Fixed seating of bearings in paddocks - Google Patents

Abstract

The present invention relates to a bearing arrangement (7) for mounting chassis parts in a motor vehicle body, comprising an elastomeric bush bearing (8) which has an inner sleeve (1), at least one radially enclosing the inner sleeve (1) and is vulcanized onto the inner sleeve (1). elastomeric body (2) and an outer sleeve (3) radially enclosing the elastomeric body (2) and vulcanized onto it, and a bearing support (7) comprising a bearing receptacle (5) assigned to and accommodating the elastomeric bush bearing (8), the bush bearing (8) is force-fitted into the mount of the bearing bracket by means of a press fit. The bearing arrangement according to the invention is characterized in that the at least one elastomeric bush bearing (8) is connected to at least one section of the bearing support that defines the bearing mount by means of a material bond by means of a weld.

Description

The present invention relates to a bearing arrangement for damped and elastic mounting of chassis parts, body parts or a wheel suspension in a motor vehicle, comprising a bearing support such as a handlebar or a coupling rod, the bearing support having at least one bearing receptacle and an elastomeric bushing bearing assigned to and inserted into the respective bearing receptacle which comprises an inner sleeve, at least one elastomer body radially surrounding the inner sleeve and vulcanized onto the inner sleeve, and an outer sleeve radially encompassing the elastomer body and vulcanized onto it. Such bearing arrangements are also referred to as couplers or links in the field.

Such bearing arrangements are used, for example, to mount parts of the chassis, the body or wheel suspensions in a damped manner and thus keep vibrations away from the passenger compartment. In one embodiment, the bearing arrangement can be attached to the chassis of a motor vehicle and connected to the body of the motor vehicle via a screw bolt that extends through the inner sleeve of the elastomer bushing bearing in the installed position.

So that the elastomeric bush bearing has a firm seat in the bearing seat of the bearing carrier, the elastomeric bush bearing is connected to the bearing seat of the bearing carrier assigned to it by means of a press fit in most of the commercially available bearing arrangements. The press fit of the elastomer bushing bearing creates an additional preload of the elastomer body. A sole press fit of the bushing bearing in the bearing eye is common practice and, for example, by the
DE 10 2008 000 858 known. Also known in the prior art are bearing arrangements in which a bush bearing is attached to the bearing eye of the bearing bracket by means of a weld.

A disadvantage of a pure interference fit between the bearing seat and the outer sleeve of the bushing bearing is in particular that with operationally high torsional forces an undesired rotational movement of the outer sleeve of the elastomeric bushing bearing relative to the bearing seat and thus the bearing carrier can occur, so that a tight fit of the bushing bearing is not guaranteed with high torsional operating forces . Also, with increasing age of the elastomer and the resulting elastomer embrittlement, the risk of torsional movement of the elastomer bushing bearing in the bearing receptacle can increase, since the tight fit of the press fit decreases due to the reduced restoring force of the elastomer.

The provision of a pure material connection or a pure torsional form connection between the outer sleeve of the bushing bearing and the bearing seat would under certain circumstances be associated with an inhomogeneous force transmission to the elastomer body, which can result from gaps and location-dependent, different contact pressures between the outer sleeve and the bearing seat if they do not lie exactly against one another which can also cause operating noises.

The present invention is based on the object of providing a bearing arrangement in which a firm and torsion-proof seat of the elastomer bushing bearing in the bearing receptacle of the bearing carrier assigned to it is ensured, with the most homogeneous possible load distribution and transmission of the vibrations / shocks from the component to be supported on the elastomer body and at the same time a very high load transfer is provided in the case of torsional and / or axial loading.

The above object is achieved according to the invention by a bearing arrangement comprising at least one elastomeric bush bearing which comprises an inner sleeve, at least one elastomer body radially surrounding the inner sleeve and vulcanized onto it, and an outer sleeve radially surrounding the elastomer body and vulcanized onto it, as well as a bearing carrier including a bearing receptacle solved, wherein the bush bearing is inserted into the receptacle of the bearing carrier in a force-locking manner by means of a press fit. The bearing arrangement according to the invention is characterized in that the elastomeric bush bearing is materially connected by means of a weld to at least one section of the bearing bracket that defines the bearing receptacle. A section of the bearing bracket that defines the bearing seat generally means an area of the bearing bracket whose boundary surface (s) defines the bearing seat or the bearing eye of the bearing bracket for receiving an associated elastomeric beech bearing at least in sections.

The bearing arrangement according to the invention solves the disadvantages of conventional bearing arrangements through the simultaneous use of a press fit and welding of the at least one elastomer bushing bearing in or to the bearing receptacle of the bearing carrier assigned to it. This bearing receptacle can be designed, for example, as a bearing eye that can be formed by at least one section of the bearing bracket. With the design of the bearing arrangement according to the invention, on the one hand, by providing the press fit between the bush bearing and the bearing receptacle, an optimal load absorption of the bearing without the risk of any operating noises occurring and, at the same time, an improvement in the response behavior of the Bearing arrangement can be provided in the event of very high torsional and / or axial operating forces on the bearing.

Further features according to the invention and developments of the invention are specified in the general description, the figures, the description of the figures and the subclaims.

The material connection between the at least one elastomeric bushing bearing and the bearing carrier can advantageously take place by means of laser welding of the elastomeric bushing bearing to the bearing receptacle of the bearing carrier assigned to the bushing bearing. The advantage of laser welding is, in particular, that the material in the area of the welding location does not heat up over a large area and thus does not become severely deformed, which ensures that the elastomer bushing bearing is seated without gaps after the bearing has been pressed into the bearing receptacle despite the welding process. Furthermore, the welding process during laser welding can be flexibly controlled, e.g. in such a way that the elastomer bushing bearing and the bearing receptacle can be welded to one another at several, in particular circumferentially spaced, points.

In an advantageous embodiment of the bearing arrangement, the integral connection can be made by welding the at least one elastomeric bushing bearing to the bearing seat of the bearing bracket assigned to it, by welding the outer sleeve of the elastomeric bushing bearing to a section of the bearing bracket that defines the bearing seat. Such a welding can take place at a single welding point or also at a plurality of welding points which are circumferentially spaced apart in particular from an axis of the elastomeric bush bearing.

It can be provided that the outer sleeve of the bush bearing is welded on one end face and / or on an outer cylinder jacket surface to the at least one section of the section of the bearing bracket that defines the bearing receptacle. It can further be provided that the section of the bearing carrier that defines the bearing receptacle is welded to the outer sleeve of the bushing bearing on an end face and / or an inner cylinder jacket surface.

In embodiments in which, in the installed position, an axial end face of the outer sleeve of the bearing is arranged approximately axially flush with a section of the bearing bracket that defines the bearing receptacle, these end faces of the bearing bracket and outer sleeve can expediently be welded. If, in the installed position of the bearing, the section of the bearing bracket that defines the bearing seat, in particular a bearing eye, extends axially over the outer sleeve of the bushing bearing, the one or more welds between an axial end face of the outer sleeve of the bushing bearing and an inner cylinder jacket surface of the one that defines the bearing seat can Be arranged portion of the bearing bracket. If, on the other hand, in the installed position of the bearing the outer sleeve of the bushing bearing extends axially over the section of the bearing carrier that defines the bearing seat, in particular a bearing eye, the one or more weld points between an axial end face of the section that defines the bearing seat, in particular a bearing eye, can of the bearing carrier and an outer cylindrical jacket surface of the outer sleeve of the bushing bearing.

In order to generate a predetermined preload of the elastomer body, the at least one elastomer bushing bearing can have a predefined oversize with respect to the bearing receptacle of the bearing carrier assigned to it. By pressing the elastomeric bushing bearing into the bearing seat of the bearing carrier assigned to the bushing bearing, a predetermined preload of the elastomeric body of the elastomeric beech bearing is generated in a known manner.

The bearing arrangement or coupling or link according to the invention can comprise a bearing support in the form of a coupling rod or a connecting rod which has a respective bearing receptacle, in particular in the form of a bearing eye for receiving the elastomeric beech bearing. It can also be provided that the coupling or the link has a plurality of such elastomeric bushing bearings, each with associated bearing receptacles, in particular in the form of bearing eyes, for receiving the associated elastomeric bushing bearing. To this extent, it is also within the scope of the invention that a link or a coupling comprises a plurality of elastomer bushing bearings which are each materially connected by welding to a section of the bearing bracket that defines the associated bearing receptacle.

• - Bereitstellen eines elastomeren Buchsenlagers;
• - Bereitstellen eines Lagerträgers, insbesondere einer Lenkerstange oder einer Koppelstange, umfassend eine Lageraufnahme mit einem geringeren Durchmesser im Vergleich zu dem des Buchsenlagers;
• - Einpressen des zumindest einen elastomeren Buchsenlagers in die dem Buchsenlager zugeordnete Lageraufnahme des Lagerträgers;
• - Herstellen einer stoffschlüssigen Verbindung zwischen dem elastomeren Buchsenlager und zumindest einem die Lageraufnahme festlegenden Abschnitt des Lagerträgers durch Schweißen, insbesondere Laserschweißen.

The above object is also achieved by a method for producing a bearing arrangement according to the invention, comprising the steps:

• - providing an elastomeric bush bearing;
• - Provision of a bearing support, in particular a link rod or a coupling rod, comprising a bearing receptacle with a smaller diameter compared to that of the bushing bearing;
• - Pressing the at least one elastomeric bushing bearing into the bearing receptacle of the bearing carrier assigned to the bushing bearing;
• - Establishing a cohesive connection between the elastomeric bush bearing and at least one section of the bearing carrier that defines the bearing receptacle by welding, in particular laser welding.

Figure list

• 1 einen Ausschnitt einer ersten Ausführungsform einer erfindungsgemäßen Lageranordnung 7 mit einer Mehrzahl von punktuell aufgebrachten, umfänglich beabstandeten Schweißnahtstellen 4 zwischen Buchsenlager 8 und Lageraufnahme 5 in einer Draufsicht, und
• 2 einen Ausschnitt einer zweiten Ausführungsform einer erfindungsgemäßen Lageranordnung 7' mit einer um die Achse des elastomeren Buchsenlagers 8 ununterbrochen umlaufenden Schweißnaht 4 in einer Draufsicht,

zeigt.A material connection of the elastomer bushing bearing to the bearing eye of the bearing bracket assigned to it can be implemented in different forms, such as, for example, using different welding methods or different weld seam shapes. A selection of possible design options is shown in the following figures and the relevant figure descriptions, with

• 1 a section of a first embodiment of a bearing arrangement according to the invention 7th with a plurality of point-applied, circumferentially spaced weld seam locations 4th between bush bearings 8th and inventory 5 in a plan view, and
• 2 a section of a second embodiment of a bearing arrangement according to the invention 7 ' with one around the axis of the elastomeric bushing bearing 8th uninterrupted circumferential weld seam 4th in a plan view,

indicates.

the 1 and 2 each show a partial view of a bearing arrangement or coupling or link according to the invention 7th , 7 ' , comprising a bearing bracket or coupling rod 6th with at least one bearing eye 5 and one in the bearing eye 5 pressed-in elastomer bushing bearings 8th . In the embodiments shown in the figures, the outer sleeve extends 3 of the cylindrical bush bearing 8th axially over an axial end face of the, a cylindrical bearing seat 3 defining ring area 6a the coupling rod 6th away. In the embodiments of 1 and 2 is the ring area 6a the coupling rod 6th on its end face visible in the figures with the cylindrical outer jacket surface of the outer sleeve 3 of the elastomer bushing bearing 8th materially connected, in particular by means of laser welding.

The welds or welds 4th , 4` are shown here as an example in two different versions. The elastomeric bush bearing is here 8th in 1 in the installation position to design the paddock 7th by means of punctual and to the axis of the bush bearing 8th circumferentially spaced weld seams or points 4 with the ring section 6a the coupling rod 6th firmly connected.

In contrast to the paddock 7th the 1 shows the paddock 7 ' the 2 a closed, circumferential weld seam 4 ', which forms a material connection between the outer sleeve of the elastomeric bushing bearing 8th and the ring area 6a the coupling rod 6th at his in 2 visible front side.

In another, not shown embodiment of a coupling, in which in the installed position (press-in position) of the bushing bearing an axial end face of the outer sleeve of the bearing is arranged approximately axially flush with a section of the coupling rod that defines the bearing receptacle, the welding on these end faces of coupling rod and Outer sleeve take place. If, in the installed position of the bushing bearing, the section of the bearing carrier that defines the bearing seat extends axially over the outer sleeve of the bushing bearing, the one or more weld points can be arranged between an axial end face of the outer sleeve of the bushing bearing and an inner cylindrical surface of the section of the bearing carrier that defines the bearing seat .

List of reference symbols

1

Inner sleeve

2

Elastomer body

3

Outer sleeve

4, 4`

Weld point, weld seam

5

Bearing eye, bearing mount

6th

Bearing bracket, coupling rod, handlebar rod

6a

Ring area of the coupling rod or handlebar

7, 7 '

Bearing arrangement, handlebars, paddock

8th

Elastomer bush bearing

9

drilling

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 102008000858 [0003]

Claims (6)

Bearing arrangement (7), comprising an elastomer bush bearing (8) which has an inner sleeve (1), at least one elastomer body (2) which radially surrounds the inner sleeve (1) and vulcanized onto the inner sleeve (1), and an elastomer body (2) which radially surrounds the elastomer body (2) and an outer sleeve (3) vulcanized to it, as well as a bearing bracket (7), including a bearing receptacle (5) assigned to and receiving the elastomeric bushing bearing (8), the bushing bearing (8) being force-locked into the bearing receptacle of the bearing carrier by means of a press fit is, characterized in that the at least one elastomeric bush bearing (8) is materially connected by means of a weld to at least one section of the bearing bracket that defines the bearing receptacle. Bearing arrangement (7) according to Claim 1 , characterized in that the material connection between the elastomeric bush bearing (8) and the at least one section of the bearing bracket that defines the bearing receptacle is produced by laser welding. Bearing arrangement (7) according to Claim 1 or 2 , characterized in that the material connection of the elastomeric bush bearing (8) with the bearing receptacle comprises a welded connection between the outer sleeve (3) of the bush bearing (8) and a section of the bearing bracket (6) that defines the bearing receptacle. Bearing arrangement (7) according to Claim 3 , characterized in that the outer sleeve (3) of the bush bearing is welded on one of its end faces and / or on an outer cylinder jacket surface to the at least one section of the bearing bracket (6) that defines the bearing receptacle. Bearing arrangement (7) according to Claim 3 or 4th , characterized in that the at least one section of the bearing bracket that defines the bearing receptacle is welded to the outer sleeve (3) of the bush bearing (8) on one of its end faces and / or an inner cylinder jacket surface. Method for producing a bearing arrangement (7) according to the invention according to one of the Claims 1 until 4th comprising the steps of: - providing an elastomeric bush bearing (8); - Provision of a bearing support (6), in particular a handlebar, comprising a bearing receptacle (5) with a smaller diameter compared to that of the beech bearing; - Pressing the at least one elastomeric bush bearing (8) into the bearing receptacle (5) of the bearing bracket (6) assigned to the bush bearing (8); - Establishing a cohesive connection between the elastomeric bush bearing (8) and at least one section of the bearing bracket that fixes the bearing receptacle (5) by welding, in particular laser welding.

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