DE102010047927A1 - Anti-friction bearing i.e. wheel bearing, for passenger car, has baffle plate arranged adjacent to rolling body path of inner ring or outer ring, where plate extends in radial direction with respect to rotation axis of bearing - Google Patents

Abstract

The bearing has a set of roller bodies (3) e.g. taper roller bearings or balls, arranged between an outer ring (10) and an inner ring (2), where the roller bodies lie in bags of an anti-friction bearing cage (6). A baffle plate (7) is arranged axially adjacent to a rolling body path of the inner ring or outer ring at the anti-friction bearing cage, where the baffle plate extends in a radial direction with respect to a rotation axis of the bearing. The baffle plate includes a radially external and/or radially inner lying circular edge for sealing gap formation.

Description

Field of the invention

The invention relates. a rolling bearing, in particular wheel bearing, comprising an outer ring, an inner ring and a plurality of rolling elements arranged between the rings, wherein the rolling elements einliegen in pockets of the rolling elements leading rolling bearing cage. Such wheel bearings can be designed in two rows, wherein two bearing rings are connected to one another with a connection clip. Alternatively, two single bearings can be used.

State of the art

Background of the invention

Sealing arrangements can be used in a large number of rolling bearings, the interior of which must be protected from dirt particles in the storage environment. The seal assemblies are provided between the bearings and parts rotatable relative to each other (support and shaft or support and hub) in order to protect the greased interior of the bearing from foreign particles. These sealing arrangements require a high production cost. Not least because they are equipped with both labyrinth and abrasive seals. This is problematic in that seal assemblies generally imply high costs if they are to be effective.

Out DE 1 030 629 A . DE 198 13 587 B4 or DE 27 53 340 A1 Rolling are known, the seal assembly is connected to the roller bearing cage and sealingly seals with a radially outer and a radially inner sealing lip relative to the bearing rings. However, two sealing surfaces arise per axial side surface and thus a comparatively high friction overall.

Out US 20100086247 A1 is a tapered roller bearing is known which has a guided in an inner ring rolling bearing cage. This cage is used to facilitate installation and also for axial guidance, or attitude, at a recess of the inner ring. Since the cage is guided only in the inner ring, the friction is lower, however, the cage is not suitable for sealing the bearing.

task

Summary of the invention

The object of the invention is therefore to provide a rolling bearing, in particular wheel bearing, with a reduced cost without sacrificing an acceptable sealing effect.

The object is achieved by a wheel bearing unit of the type mentioned above in that axially adjacent to a rolling body raceway of the inner or outer ring on the roller bearing cage a substantially in the radial direction, based on a rotational axis of the rolling bearing, extending baffle plate is arranged. The baffle plate is provided for damming the grease of the rolling bearing and prevents the grease can press around the baffle plate from the interior of the bearing. The baffle plate covers the axial opening of the rolling bearing for the most part, with no radial contact with other components (eg, rings, beams, journals or hub) occur. The baffle plate forms a gap with an area adjacent to the respective running surface of the inner or outer ring. Thus, it comes to a non-contact sealing function.

The roller bearing according to the invention, in particular wheel bearing, has an outer ring, an inner ring and a plurality of rolling elements arranged between the rings, wherein the rolling elements einliegen in pockets of the rolling elements leading rolling bearing cage. The rolling elements are designed, for example, as tapered rollers or balls and transmit the load between the raceways.

In an advantageous embodiment, the baffle plate is provided to form a radially outer seal with a bearing member, a shaft or a carrier a first sealing gap. For example, in wheel bearings for trucks or passenger cars, the first sealing gap may be formed partly on the wheel hub or on the wheel. Preferably, the sealing gap is made in the size of the manufacturing tolerance, with the aim of making the sealing gap as small as possible and to prevent the grease as good as possible at the exit from the rolling bearing.

In an advantageous embodiment, the baffle plate is provided to form a second sealing gap radially inward with a bearing component, a shaft or a carrier. For example, in wheel bearings for trucks or passenger cars, the second sealing gap may be formed in part on the journal or the hub.

In an advantageous embodiment, the bearing component is a hub or a bearing ring, in particular an inner or outer ring. Regardless of what components they are made of, the sealing gap or gaps apply to it, so that the grease can close them, d. H. Withstands a low internal pressure.

In an advantageous embodiment, the baffle plate on a radially outer and / or radially inner annular edge for sealing gap formation. Such an edge forms the grease such that a labyrinth seal is formed if the grease, z. B. should no longer complete the sealing gap due to dehydration.

In an advantageous embodiment, the rolling bearing contains a lubricant which at least partially cures on exiting at the first and / or second sealing gap. Thus, a labyrinth seal with an extremely thin sealing gap is formed by the baffle plate during the rolling bearing operation, which can be easily closed by flowing grease.

In an advantageous embodiment, the hardened lubricant forms a labyrinth seal in the area of the first and / or second sealing gap together with the baffle plate. In this case, the first or second sealing gap can alternatively be provided with a grinding lip which bears against it.

In an advantageous embodiment, the baffle plate is formed integrally with the roller bearing cage, in particular the baffle plate has been injected in one step together with the roller bearing cage. It hardly represents an extra effort to eject the baffle plate together with the rolling bearing cage.

In an advantageous embodiment, the baffle plate on the roller bearing cage can be fastened, in particular, the baffle plate is riveted or glued to the roller bearing cage. In the two-part design retrofitting would be possible or the rolling bearing cage could be used in several types of rolling bearings.

Further advantageous embodiments and preferred developments of the invention can be taken from the description of the figures and / or the dependent claims.

In the following the invention will be described and explained in more detail with reference to the exemplary embodiments illustrated in the figures.

Show it:

1 a tapered roller bearing with an integrally formed on the cage baffle plate, which forms a sealing gap with both a wheel hub, and with a journal, and

2 the tapered roller bearing 1 in axial direction on the baffle plate.

embodiment

Description of the drawings

1 shows a tapered roller bearing with a one-piece on the cage 6 molded baffle plate 7 that with both a wheel hub 1 , as well as with a journal 5 forms a sealing gap.

The first 8th and second sealing gap 9 is in each case by a radially oriented edge of the bark 7 and the wheel hub 1 a truck or with the inner ring 2 educated. The outer surface 4 runs in the radial direction and can be adjusted depending on the bearing geometry.

Advantageously, low-cost tapered roller bearings can be produced in this way, which are used either with low degree of contamination or in which an occasional bearing change is bearable.

In particular, the axle journal 5 is, like the rest of the camp, shown schematically.

2 shows the tapered roller bearing 1 in the axial direction B on the baffle plate 7 ,

In the illustrated sealing gaps grease will accumulate during operation and at least locally harden. It is advantageous if, via a wheel bearing bushing, a continuous pressure in the interior can be built up, which constantly drives the lubricant outwards.

In summary, the invention relates to a rolling bearing, in particular wheel bearing, comprising an outer ring, an inner ring and a ring arranged between the plurality of rolling elements, wherein the rolling elements einliegen in pockets of a roller bearing bearing cage. The aim is to simplify the seal arrangement largely without sacrificing an acceptable sealing effect. This is achieved in that a baffle plate extending substantially in the radial direction, relative to a rotational axis of the rolling bearing, is arranged axially next to a roller body raceway of the inner or outer ring on the roller bearing cage. This baffle plate forms two sealing gaps, which can achieve a labyrinth seal, in particular in combination with a hardening lubricant, which is formed during the rolling bearing operation.

LIST OF REFERENCE NUMBERS

1

wheel hub

2

inner ring

3

Tapered roller

4

outside

5

journal

6

Rolling bearing cage

7

baffle plate

8th

first sealing gap

9

second sealing gap

10

outer ring

B

axial line of sight

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 1030629 A [0003]
• DE 19813587 B4 [0003]
• DE 2753340 A1 [0003]
• US 20100086247 A1 [0004]

Claims (9)

Rolling bearings, in particular wheel bearings, with an outer ring ( 10 ), an inner ring ( 2 ) and one between the rings ( 2 . 10 ) arranged plurality of rolling elements ( 3 ), wherein the rolling elements ( 3 ) in pockets of a rolling element ( 3 ) leading rolling bearing cage ( 6 ) einliegen, characterized in that axially adjacent to a rolling body race of the interior ( 2 ) or outer ring ( 10 ) on the roller bearing cage ( 3 ) a substantially in the radial direction, with respect to a rotational axis of the rolling bearing, extending baffle plate ( 7 ) is arranged. Rolling bearing according to claim 1, wherein the baffle plate ( 7 ) is provided radially outward with a bearing component, a shaft or a carrier a first sealing gap ( 8th ) to build. Rolling bearing according to claim 1 or 2, wherein the baffle plate ( 7 ) is provided radially inward with a bearing component ( 2 ), a shaft or a carrier ( 5 ) a second sealing gap ( 9 ) to build. Rolling bearing according to claim 1 or 2, wherein the bearing component ( 2 ) a hub ( 1 ) or a bearing ring ( 2 ), in particular an interior ( 2 ) or outer ring is. Rolling bearing according to one of the preceding claims, wherein the baffle plate ( 7 ) has a radially outer and / or radially inner annular edge for sealing gap formation. Rolling bearing according to one of the preceding claims, wherein the rolling bearing contains a lubricant, which at the outlet at the first and / or at the second sealing gap ( 8th . 9 ) at least partially hardens. Rolling bearing according to claim 6, wherein the hardened lubricant in the region of the first and / or second sealing gap ( 8th . 9 ) together with the baffle plate ( 7 ) forms a labyrinth seal. Rolling bearing according to claim 1, wherein the baffle plate ( 7 ) integral with the rolling bearing cage ( 3 ) is formed, in particular in one step together with the rolling bearing cage ( 3 ) has been injected. Rolling bearing according to claim 8, wherein the baffle plate ( 7 ) is fastened to the rolling bearing cage, in particular riveted or glued to the roller bearing cage.

Images