DE102018130688A1 - Axial roller bearings - Google Patents

Abstract

The invention relates to an axial roller bearing (1), comprising a first and a second bearing ring (2, 3), between which a set of roller bodies (4) is arranged, at least one of the bearing rings (2, 3) having an annular bearing disc (5 ), which is held by a retaining ring (6). In order to obtain an improved defined support of the bearing disk on the retaining ring, the invention provides that the retaining ring (6) has at its radially (r) outer end a projection (7) extending in the axial direction (a), which is for the bearing disk (5) offers a centering function.

Description

Field of the Invention

The invention relates to an axial rolling bearing, comprising a first and a second bearing ring, between which a set of rolling elements is arranged, at least one of the bearing rings comprising an annular bearing disk which is held by a retaining ring.

Background of the Invention

Axial roller bearings are well known in the prior art. For example, they are used as a sealed unit. Such a solution shows the EP 1 744 069 A1 .

Axial bearings of this type should be installed in such a way that there is a good support for the surrounding component, which offers the bearing sufficient support. In some applications, however, the support for the bearing is interrupted (for example due to oil grooves). To compensate for this, the construction mentioned is used, which provides a sufficiently stable bearing disc which is held by the retaining ring. Due to the always limited installation space, especially in the radial direction, this construction method makes high demands.

For this purpose, solutions are known, see the document mentioned above, which provides a bearing ring which is L-shaped in radial section and which is produced by a shaping process. The bearing ring consists of a relatively thick and therefore stable sheet. Therefore, there are problems with the sheet metal forming. Another disadvantage of this solution is that the assembly of the bearing can be problematic at times. In particular, the bearing cage can be damaged when it is inserted. Furthermore, due to the relatively rigid design, there is the disadvantage that the bearing can only adapt to the installation conditions to a limited extent (the bearing washers or bearing rings hardly flatten out during operation under load). The disadvantageous consequence can be an increased noise in operation. Furthermore, the service life of the bearing is adversely affected.

If a generic design of the bearing ring is provided, i.e. a bearing washer that is held by a retaining ring, it sometimes results disadvantageously that the bearing washer bears against the junction of the two legs of the L-shaped contour of the retaining ring and thus the bearing of the bearing washer on the retaining ring is not clearly defined. Here there are also signs of wear.

Object of the invention

The present invention has for its object to develop a generic axial rolling bearing so that the above problems are reduced. In particular, there should be an improved, defined support of the bearing disk on the retaining ring. The measures required in this regard should be able to be implemented in a technically simple and therefore inexpensive manner.

Summary of the invention

The solution to this problem by the invention is characterized in that the retaining ring has at its radially outer end a projection extending in the axial direction, which offers a centering function for the bearing washer.

The protrusion advantageously extends around the entire circumference (i.e. 360 °) of the retaining ring.

The projection can be formed by a section of the retaining ring bent in the axial direction. In this case it is preferably provided that the projection (in the radial section) is straight and encloses an angle to the radial direction. The angle is preferably between 20 ° and 50 °.

The projection is preferably formed from the material of the retaining ring by means of a shaping process.

One possible application is an axial needle bearing, in which the invention can be used with particular preference.

A closed (sealed) embodiment is preferably provided.

With the proposed concept, a defined radial position relative to the retaining ring is ensured for the bearing washer.

In particular, the 360 ° protrusion, which is designed as a bent section of the retaining ring, provides a good centering function, which centers the bearing disk relative to the retaining ring. This ensures a good support of the bearing disc on the retaining ring. The retaining washer is also better held in the proper operating position.

The proposed solution can avoid large thicknesses of the bearing disc or the retaining ring. The manufacturing process is thus simplified by forming. Furthermore, it can be that thinner sheets for the bearing washer are used, whose improved system can be achieved on neighboring components.

The construction also ensures that there is no bearing of the bearing disc in the corner (junction of the two legs of the L-shaped structure) of the retaining ring. This reduces wear.

Finally, the assembly process of the bearing can be simplified.

Figure list

• 1 im Radialschnitt einen Teil eines Axial-Wälzlagers nach einer Ausführungsform der Erfindung und
• 2 das Detail „X“ gemäß 1.

An exemplary embodiment of the invention is shown in the figures. Show it:

• 1 in radial section part of an axial roller bearing according to an embodiment of the invention and
• 2nd the detail "X" according to 1 .

Detailed description of the figures

In the figures there is an axial roller bearing 1 to see which is a first bearing ring 2nd and a second bearing ring 3rd having. Between the two bearing rings 2nd , 3rd is a set of rolling elements 4th arranged by a cage 8th being held.

During the second bearing ring 3rd consists of a single component, namely an L-shaped ring element, is the first bearing ring 2nd formed in two parts in the present case. It includes a bearing disc 5 by a retaining ring 6 is held or carried.

The retaining ring 6 includes one in the radial direction r extending section on which the bearing washer 5 is present, as well as one in the axial direction a extending section.

The retaining ring has at its radially outer end 6 one in the axial direction a extending projection 7 on. It consists of a section of the retaining ring 6 which is formed by a forming process 1 apparent position was bent. This section has remained essentially linear in the radial section, but it is at an angle α to the radial direction r aligned. In the exemplary embodiment, this angle is approximately 30 °.

By the lead 7 is for the bearing washer 5 a centering function is provided so that the bearing washer 5 when installing in the axial direction a on the retaining ring 6 is put on and immediately finds a centered position.

Due to the proposed construction, not only the bearing washer 5 relative to the retaining ring 6 centered. By appropriate selection of the inside diameter of the bearing washer 5 it is also ensured that the edge of the bearing washer, which is radially inside adjacent to the retaining ring 6 comes to rest, not at the transition section between the two legs of the retaining ring 6 can toast.

In the proposed solution, a bearing washer 5 be used, which has sharp edges, which is therefore not chamfered. Nevertheless, by the design of the retaining ring 6 with a head start 7 ensured that the bearing washer 5 clearly defined on the retaining ring 6 is present and there is no sharp-edged contact between the bearing washer 5 and the retaining ring 6 is coming. This is particularly evident from the enlarged view 2nd forth.

If, as in the exemplary embodiment, the retaining ring 6 a bend in the other end 9 has to be ensured that the radially outermost diameter of the fold 9 is smaller than the radially inner diameter of the bearing disc 5 .

The lead 7 can be produced in a cost-effective manner by a forming process.

The proposed construction also makes it easy to provide the bearing as a sealed unit. The retaining ring 6 is manufactured with the usual thicknesses.

The two bearing rings 2nd and 3rd can be provided as flanged (ie radial L-shaped) parts. In the same way, however, it is also possible for a bearing ring to be dispensed with and this to be implemented by the adjacent component itself.

Reference symbol list

1

Axial roller bearings

2nd

first bearing ring

3rd

second bearing ring

4th

Rolling elements

5

Bearing washer

6

Retaining ring

7

head Start

8th

Cage

9

Folding

a

axial direction

r

radial direction

α

angle

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

• EP 1744069 A1 [0002]

Claims (4)

Axial roller bearing (1), comprising a first and a second bearing ring (2, 3), between which a set of roller bodies (4) is arranged, at least one of the bearing rings (2, 3) comprising an annular bearing disc (5) which is held by a retaining ring (6), characterized in that the retaining ring (6) has at its radially (r) outer end a projection (7) extending in the axial direction (a), which has a centering function for the bearing disc (5) offers. Axial roller bearings after Claim 1 , characterized in that the projection (7) runs around the entire circumference of the retaining ring (6). Axial roller bearings after Claim 1 or 2nd , characterized in that the projection (7) is formed by a section of the retaining ring (6) bent in the axial direction (a). Axial roller bearings after Claim 3 , characterized in that the projection (7) is straight and includes an angle (α) to the radial direction (r), the angle (α) preferably being between 20 ° and 50 °.

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