DE102014216120A1 - Bearing arrangement of a steering column of a motor vehicle - Google Patents

Abstract

Bearing arrangement of a steering column of a motor vehicle, with a bearing (5), which has an outer ring (7) and an inner ring (6) and arranged therebetween rolling elements (9), wherein the inner ring (6) on a bearing assembly on one of the associated steering shaft (2 ) arranged tolerance ring (4), wherein between the inner ring (6) and the tolerance ring (4) a compensation element (10), to compensate for an axial and / or radial backlash of the bearing assembly is arranged, one of the tolerance ring (4) facing surface of the inner ring (6) has the compensating element (10).

Description

Field of the invention

The invention relates to a bearing arrangement of a steering column of a motor vehicle.

Background of the invention

Bearing arrangements for motor vehicle-side steering columns are known from the prior art in different embodiments. Corresponding bearing arrangements typically comprise two rolling bearings, which are arranged axially braced against one another in corresponding steering columns.

An outer ring is usually pressed directly into the steering column of the steering column. For larger tolerances of the steering tube this can also sit by means of a tolerance ring in the steering tube. With respect to the Verbausituation a known bearing assembly, the tolerance ring is coupled in the region of an axial end with a spring axially compressing this.

It is problematic, especially due to non-circularity of the bearing seats and misalignment between the bearings that can result in an axial movement upon rotation of the steering shaft. This usually leads to Reibmomentschwankungen because the static friction between the tolerance ring and the steering shaft is greater than a tolerance ring axially moving axial force.

The DE 199 52 119 A1 describes a bearing assembly of a steering column with a rolling bearing. An inner ring of the rolling bearing is accommodated by an elastic tolerance ring. The tolerance ring is attached by means of holding elements to a steering shaft.

Summary of the invention

The object of the present invention is to provide an improved bearing arrangement of a steering column of a motor vehicle.

According to the invention this object is achieved by a bearing assembly of a steering column of a motor vehicle, with a bearing having an outer ring and an inner ring and arranged therebetween rolling elements, wherein the inner ring is disposed on a bearing assembly on one of the associated steering shaft tolerance ring, wherein between the inner ring and the tolerance ring, a compensation element, to compensate for an axial and / or radial clearance of the bearing assembly, is arranged, wherein a tolerance ring facing surface of the inner ring having the compensation element.

The bearing arrangement according to the invention of a steering column has an inner ring which has the compensation element on a surface facing the tolerance ring. By means of the inventive principle, a special arrangement of the compensating element is thus realized, which makes it possible that the tolerance ring assigned to the bearing to compensate for a radial and / or axial play, no compensating movements must perform. In addition, axial movements can be absorbed by the bearing assembly without much resistance. In addition, the compensation element is provided on the surface of the inner ring, whereby it is captively mounted.

According to an alternative embodiment of the invention, the compensation element and the inner ring are cohesively connected to each other. As a result, a secure and captive attachment of the compensation element and the inner ring is created.

In a further embodiment of the invention, the inner ring is formed from a one-piece two-component component and wherein the two-component component has a hard component and a soft component. By means of the two-component component, the assembly can be simplified and improved. In addition, this component can be produced in a simple and economical manner, in particular also with different geometries.

Preferably, the soft component forms the compensation element. With regard to the function of the compensating element, plastic materials with a high elastic content are particularly suitable for the formation.

The hard component, which forms the inner ring, is formed from a metallic material. Alternatively, the hard component can also consist of a plastic. The two components, i. the inner ring and the compensating element are materially connected to each other. For this purpose, the hard component, i. on the metallic material, the compensation element or injected. If the hard component is made of a plastic, the inner ring is injected in a first step and in a second step, the compensation element on the inner ring or sprayed on. Such a design of the inner ring, it is possible to reduce the total number of components. This has the advantage that material and manufacturing costs can be reduced. On the other hand, the assembly is simplified. Occurring positioning errors that may arise during assembly are avoided.

According to one embodiment of the invention, the tolerance ring is arranged with an axial end directly adjacent to a holding element arranged on the steering shaft. These serve to axially secure the axial position of the bearing assembly associated bearing on the steering shaft. Corresponding holding elements are mounted on the steering shaft, for example by latching or clawing.

Preferably, the bearing is designed as a rolling bearing. The rolling bearing is preferably designed as angular contact ball bearings.

Short description of the drawing

Hereinafter, an embodiment of the invention will be illustrated with reference to two figures. Show it:

1 a schematic diagram of a bearing assembly according to an embodiment of the invention, and

2 an enlarged view of in 1 shown detail II.

Detailed description of the drawing

1 shows a schematic diagram of a bearing assembly 1 according to an embodiment of the invention. The bearing arrangement 1 includes a rotatably mounted about the rotation axis A steering shaft 2 , On the steering shaft 2 are two retaining elements 3 attached. The holding elements 3 lie in the axial direction respectively with a portion at axial ends respectively on the steering shaft 2 non-rotatably arranged tolerance rings 4 at.

On each one of the tolerance rings 4 is each a warehouse 5 , which is designed as angular contact ball bearings arranged. An inner ring 6 of the camp 5 is non-rotatable on the outer circumference of the tolerance ring 4 arranged.

An outer ring 7 of the camp 5 is on a housing part 8th attached. Between the inner ring 6 and the outer ring 7 are rolling elements 9 arranged.

To compensate for an axial and / or radial clearance of the bearing assembly 1 is a compensation element 10 intended.

2 shows an enlarged view of in 1 detail II. In 2 is the compensation element 10 closer. The compensation element 10 is between the inner ring 6 and the tolerance ring 4 arranged.

As can be seen, one has the tolerance ring 4 facing surface of the inner ring 6 the compensation element 10 on. The inner ring 6 is formed of a one-piece two-component component and wherein the two-component component is a hard component 11 and a soft component 12 having. The two components, ie the inner ring 6 and the compensation element 10 , are materially interconnected.

The hard component forms the inner ring 6 made and is formed of a metallic material. The soft component 12 forms the compensation element 10 made of, for example, an elastomer.

LIST OF REFERENCE NUMBERS

1

 bearing arrangement

2

 steering shaft

3

 retaining element

4

 tolerance ring

5

 camp

6

 inner ring

7

 outer ring

8th

 housing part

9

 rolling elements

10

 compensation element

11

 hard component

12

 soft component

A

 axis of rotation

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 19952119 A1 [0005]

Claims (6)

Bearing arrangement of a steering column of a motor vehicle, with a bearing ( 5 ), which has an outer ring ( 7 ) and an inner ring ( 6 ) and arranged therebetween rolling elements ( 9 ), wherein the inner ring ( 6 ) on a steering shaft associated with one of the bearing assemblies ( 2 ) arranged tolerance ring ( 4 ), wherein between the inner ring ( 6 ) and the tolerance ring ( 4 ) a compensation element ( 10 ), for compensating an axial and / or radial play of the bearing arrangement, is arranged, characterized in that a tolerance ring ( 4 ) facing surface of the inner ring ( 6 ) the compensation element ( 10 ) having. Bearing arrangement according to claim 1, wherein the compensating element ( 10 ) and the inner ring ( 6 ) are cohesively connected to each other. Bearing arrangement according to one of the preceding claims, wherein the inner ring ( 6 ) is formed from a one-piece two-component component and the two-component component is a hard component ( 11 ) and a soft component ( 12 ) having. Bearing assembly according to claim 3, wherein the soft component ( 12 ) the compensation element ( 10 ) trains. Bearing arrangement according to one of the preceding claims, wherein the tolerance ring ( 4 ) with one axial end directly adjacent to one on the steering shaft ( 2 ) arranged holding element ( 3 ) is arranged. Bearing arrangement according to one of the preceding claims, wherein the bearing ( 5 ) is designed as a rolling bearing.

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