DE102017114437A1 - Rolling bearings, in particular ball bearings - Google Patents

Abstract

The invention relates to a roller bearing (1), in particular a ball bearing, comprising a bearing inner ring (2), a bearing outer ring (3) and between the two bearing rings (2, 3) in a cage (5) guided rolling elements (4), wherein the bearing rings ( 2, 3) are produced by a non-cutting shaping process and each bearing ring (2, 3) has a profiling (6).
According to the profiling (6), starting from the axis of rotation of the rolling bearing (1), on the bearing inner ring (2) of radially inner and outer bearing ring (3) from the outside radially filled with a composite material (9).

Description

Field of the invention

The invention relates to a rolling bearing, in particular ball bearings, according to the preamble of claim 1 and a manufacturing method of such a rolling bearing.

Background of the invention

Rolling, in particular ball bearings, there are a variety of designs, each rolling bearing design has characteristic properties and is each suitable for a particular application.

Four point bearings are a special form of angular contact ball bearings and usually have a solid outer ring, a split inner ring and a plurality of interposed rolling elements. The raceways of the bearing rings are designed such that four contact points arise between each rolling element and the two raceways of the bearing rings. Four-point bearing with a one-piece bearing inner ring are also known, such as in the DE 10 2015 220 607 A1 disclosed.

In the DE 10 2004 050 728 A1 discloses a thin ring bearing with bearing rings made by a chipless forming process. The thin-section bearing consists of two bearing rings between which roll rolling elements on associated raceways. The thin-section bearing disclosed here can also be designed as a four-point ball bearing.

In the DE 10 2013 209 201 A1 discloses a deep groove ball bearing with an outer ring, an inner ring and arranged therebetween rolling elements, wherein the outer ring is made by deep drawing a profile sheet metal disc. In an embodiment disclosed here, the inner ring can also be produced by deep drawing a sheet metal ring.

In general, non-cutting bearing rings have a small wall thickness. Therefore, to provide sufficient stability, environmental components are provided with high precision. In addition, expensive procedures may be necessary to avoid strong deformation of the bearing rings. This is achieved, for example, by hardening and several grinding passes.

Object of the invention

Object of the present invention is to show a more producible in comparison with the prior art rationally rolling bearings with low wall thicknesses that withstands great forces.

Description of the invention

To achieve the object of the invention, the rolling bearing specified in claim 1 and in claim 7 whose manufacturing method is proposed. Optional advantageous embodiments of the invention arise wholly or partly from the dependent claims.

The rolling bearing according to the invention, in particular ball bearings, has a bearing inner ring, a bearing outer ring and between the two bearing rings in a cage guided rolling elements. The rolling elements are preferably formed as balls. The bearing rings are manufactured by a non-cutting shaping process. Due to the non-cutting production of the bearing rings, the wall thicknesses of the bearing rings are very small compared to bearing rings produced by machining.

Furthermore, each bearing ring has a profiling. The rolling bearing according to the invention is characterized in that the profilings, starting from the rotational axis of the rolling bearing, are filled on the bearing inner ring from radially inward and on the bearing outer ring from radially outside with a composite material. This means that the bearing inner ring are filled on its inner peripheral surface and the bearing outer ring on its outer peripheral surface with the composite material.

The composite material filled in the profilings increases the rigidity of the bearing rings, which enables increased support of radial loads. Furthermore, the heat generated in the rolling bearing is delivered to the housing by the composite material. For this purpose, all suitable composite materials with the appropriate properties can be used. Preferably, the profiles are filled with a ceramic composite material. For example, a ceramic composite material from the dental field can be used.

For example, the profiling is wavy in each case. Each profiling of a bearing ring is preferably formed in each case from two beads arranged next to one another. Under a bead is to understand a groove-shaped circumferential circumferential recess on the bearing ring. The recesses protrude in the direction of the rolling elements, that is, into the bearing interior.

Furthermore, the two adjacent beads of a bearing ring preferably define the raceway in which the rolling elements roll. The rolling bearing is preferably designed as a ball bearing, so that the rolling elements are designed as balls.

For example, the rolling bearing is designed as a four-point bearing. Here are the rolling elements in four points with the beads of the bearing rings in contact. Each bead preferably contacts one of the rolling bodies at a point.

The cage that guides the rolling elements is preferably designed as a two-part cage. Furthermore, it is expedient if the cage is made of plastic.

The inventive method for producing a rolling bearing according to the invention described above is characterized in that the profiles of the bearing rings are filled with a composite material. In an exemplary embodiment, the profiles of the bearing rings are filled with a ceramic composite material.

The profiles of the bearing rings are filled, for example, before assembly. Alternatively, the filling of the profiles can be carried out in already assembled bearings.

Preferably, the rolling bearings of the invention are used in the automotive industry. Likewise, the rolling bearing is suitable for stationary applications.

list of figures

• 1 ein beispielhaftes Wälzlager ohne Befüllung in perspektivischer Ansicht,
• 2 das Wälzlager aus 1 in Schnittansicht,
• 3 eine beispielhafte Ausführungsform eines Lageraußenrings in perspektivischer Ansicht,
• 4 den Lageraußenring aus 3 in Schnittansicht,
• 5 eine beispielhafte Ausführungsform eines Lagerinnenrings in perspektivischer Ansicht,
• 6 den Lagerinnenring aus 5 in Schnittansicht,
• 7 eine beispielhafte Ausführungsform eines erfindungsgemäßen Wälzlagers mit befüllten Profilierungen in Schnittansicht.

Further details, features, combinations of features and effects on the basis of the invention will become apparent from the following description of preferred, exemplary embodiments of the invention and from the drawings. These show in:

• 1 an exemplary rolling bearing without filling in perspective view,
• 2 the rolling bearing 1 in sectional view,
• 3 an exemplary embodiment of a bearing outer ring in perspective view,
• 4 the bearing outer ring 3 in sectional view,
• 5 an exemplary embodiment of a bearing inner ring in a perspective view,
• 6 the bearing inner ring 5 in sectional view,
• 7 an exemplary embodiment of a rolling bearing according to the invention with filled profiles in a sectional view.

Detailed description of the drawings

In all figures, identical or equivalent parts are provided with the same reference numerals.

In the 1 and 2 is an exemplary embodiment of a rolling bearing according to the invention 1 shown in different views. The rolling bearing 1 is designed as a ball bearing and has a bearing inner ring 2 and a bearing outer ring 3 on. Both bearing rings 2 . 3 are made of a sheet metal strip by chipless forming.

Between the two bearing rings 2 . 3 are according to 1 a variety of rolling elements 4 arranged. The rolling elements 4 are formed here as balls and are in a two-piece cage 5 held and guided. The cage 5 is designed here as sheet metal cage.

According to the 3 to 6 have the two bearing rings 2 . 3 each a wave-shaped profiling 6 on, with each profiling 6 from two beads 7 consists. The two arranged side by side, in the direction of the axis of rotation of the rolling bearing 1 integrated circumferential beads 7 the two bearing rings 2 . 3 form the raceways 8th for those in the rolling bearing 1 located rolling elements 4 , Every bead 7 is one in the circumferential direction of the bearing ring 2 . 3 circumferential recess.

At the bearing outer ring 3 protrude the two beads 7 in the direction of the axis of rotation of the rolling bearing 1 , This means that the outer peripheral surface of the bearing outer ring 3 has two recesses. Accordingly, the inner peripheral surface of the bearing outer ring 3 two increases on.

At the bearing inner ring 2 however, the two beads protrude 7 radially from the axis of rotation of the rolling bearing 1 path. This means that the inner peripheral surface of the bearing inner ring 2 has two recesses. The outer peripheral surface of the bearing inner ring 2 thus has two increases.

The size of the beads 7 as well as the arrangement of the beads 7 are to the rolling elements 4 customized. Furthermore, the beads 7 , in terms of size and arrangement in the axial direction, on both bearing rings 2 . 3 identical. The wall thicknesses of the two bearing rings 2 . 3 are also identical.

According to 1 is the rolling bearing shown here 1 designed as a four-point bearing. That means every rolling element 4 the beads 7 the bearing rings 2 . 3 touched in four points.

In the 7 is an inventive rolling bearing 1 represented, whose beads 7 , that is, in each case the depressions in the bearing rings 2 . 3 , with a composite material 9 , here ceramic composite material, are filled and flush with the respective bearing ring 2 . 3 to lock.

LIST OF REFERENCE NUMBERS

1

roller bearing

2

Bearing inner ring

3

Bearing outer ring

4

rolling elements

5

Cage

6

profiling

7

Beading

8th

career

9

Composite material

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 102015220607 A1 [0003]
• DE 102004050728 A1 [0004]
• DE 102013209201 A1 [0005]

Claims (8)

Rolling bearing (1), in particular ball bearing, comprising a bearing inner ring (2), a bearing outer ring (3) and between the two bearing rings (2, 3) in a cage (5) guided rolling elements (4), wherein the bearing rings (2, 3) are produced by a non-cutting shaping process and each bearing ring (2, 3) has a profiling (6), characterized in that the profilings (6), starting from the rotational axis of the rolling bearing (1), on the bearing inner ring (2) from radially inside and on the bearing outer ring (3) are filled from radially outside with a composite material (9). Rolling bearing (1) according to Claim 1 , characterized in that the profilings (6) are filled with a ceramic composite material (9). Rolling bearing (1) according to one of the preceding claims, characterized in that each profiling (6) of a bearing ring (2, 3) is formed in each case from two beads (7). Rolling bearing (1) according to Claim 3 , characterized in that the two adjacent beads (7) of a bearing ring (2, 3) define the raceway (8) in which the rolling elements (4) roll. Rolling bearing (1) according to one of the preceding claims, characterized in that the rolling bearing (1) is designed as a four-point bearing. Rolling bearing (1) according to one of the preceding claims, characterized in that the cage (5) is designed as a two-part cage (5). Method for producing a rolling bearing (1) according to one of Claims 1 to 6 , characterized in that the profilings (6) of the bearing rings (2, 3) are filled with a composite material (9). Method according to Claim 7 , characterized in that the profilings (6) of the bearing rings (2, 3) are filled with a ceramic composite material (9).

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