DE102018119571A1 - Bearing arrangement for a wheel bearing of a motor vehicle - Google Patents

Abstract

The invention relates to a bearing arrangement (1) for a wheel bearing of a motor vehicle, comprising at least one outer ring (2) and at least one inner ring (3) and rolling elements (4) arranged spatially between them, with radial between the inner ring (3) and the outer ring (2 ) a sealing element (5) for sealing an interior (6) is arranged, the inner ring (3) being connected in a rotationally fixed and axially fixed manner to a wheel hub (8) by means of a roller rivet collar (7), a starting element in the area of the sealing element (5) (9) is arranged, the thrust element (9) being fixed at least axially between the roller rivet collar (7) and the inner ring (3).

Description

The invention relates to a bearing arrangement for a wheel bearing of a motor vehicle, comprising at least one outer ring and at least one inner ring and rolling elements arranged spatially therebetween. A sealing element for sealing an interior is arranged radially between the inner ring and the outer ring. The inner ring is connected in a rotationally fixed and axially fixed manner to a wheel hub by means of a roller rivet collar, a thrust element being arranged in the region of the sealing element.

From the WO 2015/120831 A1 is a rolling bearing of a wheel bearing unit, which has at least one outer ring and at least one inner ring and rolling elements arranged between them. To seal an interior, a roller bearing seal is provided which includes at least one carrier element connected to a bearing ring, the carrier element being supported and fastened to the bearing ring with an angled leg. The angled leg of the carrier element is firmly attached to one of the bearing rings of the rolling bearing.

The object of the present invention is to further develop a bearing arrangement, the sealing and assembly of the bearing arrangement in particular being to be optimized. The object is achieved by the subject matter of patent claim 1. Preferred embodiments can be found in the dependent claims, the description and the figures.

A bearing arrangement according to the invention for a wheel bearing of a motor vehicle comprises at least one outer ring and at least one inner ring and rolling elements arranged spatially therebetween, a sealing element for sealing an interior being arranged radially between the inner ring and the outer ring, the inner ring being rotatably and axially fixed to one by means of a rolling rivet collar Wheel hub is connected, a thrust element being arranged in the region of the sealing element, and the thrust element being fixed at least axially between the roller rivet collar and the inner ring. A fixation is understood to mean that the thrust element is arranged in a rotationally and positionally fixed manner between the roller rivet collar and the inner ring.

The inner ring is pressed onto the wheel hub during assembly, the sealing element subsequently being mounted radially between the inner ring and the outer ring. Depending on the design and requirements of the bearing arrangement, the thrust element is pressed or pushed onto the wheel hub and comes to rest axially on the inner ring. The roller rivet collar is then formed in a roller riveting process, as a result of which the thrust element is clamped or fixed between the inner ring and the roller rivet collar for axial securing. As a result, the thrust element no longer has to be pushed or pressed onto a rim of the inner ring, so that incorrect assembly, for example due to improper use of the assembly tools, is prevented. In particular, the static sealing of the bearing arrangement is improved and made more error-independent.

The start element is preferably designed as a start plate. In other words, the stop plate is comparatively thin-walled and preferably produced by stamping and reshaping.

At least one sealing ring is preferably arranged on the thrust element, which is spatially fixed between the thrust element and the roller rivet collar or between the thrust element and an end face of the inner ring. For this purpose, the inner ring is recessed locally, for example, in order to at least partially accommodate the sealing ring with the thrust element. The sealing ring can be designed, for example, as an O-ring and can also be vulcanized onto the thrust element.

The invention includes the technical teaching that the thrust element comes to rest with a first axial leg on a shoulder in the region of an inner lateral surface of the inner ring. In other words, the thrust plate is angled on the inner ring side and thus engages behind the inner ring. The first axial leg is formed essentially at right angles to a support section of the thrust element or parallel to the axis of rotation of the inner ring and forms a radial seat, whereby a radial runout of the bearing arrangement is improved.

Furthermore, the thrust element preferably surrounds an outer lateral surface of the outer ring with a second axial leg. In other words, the thrust plate is angled on the outer ring side and engages behind the outer ring. The thrust element with the second axial leg does not come into contact with the outer ring. The thrust element can either have only the first or the second axial leg, or the thrust element has both a first and a second axial leg, in which case the axial legs are oriented essentially parallel to one another. It is also conceivable to bend the thrust plate in the same direction or to design the axial limbs in opposite directions.

Alternatively, the thrust element projects at least partially into the sealing element with a second axial leg. This improves the sealing of the interior of the bearing arrangement.

According to a preferred embodiment, the thrust element is designed as a thrust washer with an essentially rectangular cross section. The thrust washer is thicker than the previously described thrust plate, the thrust washer absorbing radial forces during the roller riveting process in order to minimize a process-related influence on the inner ring. In particular, cracks on the inner ring are avoided.

Preferably, the thrust washer at least partially accommodates a sealing section of the sealing element to form a labyrinth seal. In other words, a circumferential, axially formed groove is provided on the thrust washer, into which the sealing section of the sealing element projects at least partially in order to achieve an additional sealing effect. The sealing section of the sealing element does not come into contact with the thrust washer in order to avoid friction losses.

An encoder is preferably arranged on the starting element. The encoder is essentially a signal generator, which comprises, for example, an encoder functional layer and / or an encoder material. The encoder forms a function chain with a separate sensor element, which can be used, for example, to record the speed of the rotating inner ring.

Furthermore, the sealing element preferably comprises at least one sealing lip, which comes into sealing contact with the inner ring and / or the thrust element. The at least one sealing lip consists, for example, of an elastomer which is vulcanized or molded onto a carrier material, for example, the at least one sealing lip sealing the interior of the bearing arrangement. The sealing element preferably has two or more radial and / or axial sealing lips.

• 1 eine vereinfachte schematische Schnittdarstellung einer erfindungsgemäßen Lageranordnung gemäß einem ersten Ausführungsbeispiel,
• 2 eine vereinfachte schematische Schnittdarstellung der erfindungsgemäßen Lageranordnung gemäß einem zweiten Ausführungsbeispiel,
• 3 eine vereinfachte schematische Schnittdarstellung der erfindungsgemäßen Lageranordnung gemäß einem dritten Ausführungsbeispiel,
• 4 eine vereinfachte schematische Schnittdarstellung der erfindungsgemäßen Lageranordnung gemäß einem vierten Ausführungsbeispiel, und
• 5 eine vereinfachte schematische Schnittdarstellung der erfindungsgemäßen Lageranordnung gemäß einem fünften Ausführungsbeispiel.

Further measures improving the invention are shown below together with the description of five preferred exemplary embodiments of the invention with reference to the five figures, the same or similar components being provided with the same reference numerals. It shows

• 1 2 shows a simplified schematic sectional illustration of a bearing arrangement according to the invention in accordance with a first exemplary embodiment,
• 2 1 shows a simplified schematic sectional illustration of the bearing arrangement according to the invention in accordance with a second exemplary embodiment,
• 3 1 shows a simplified schematic sectional illustration of the bearing arrangement according to the invention in accordance with a third exemplary embodiment,
• 4 a simplified schematic sectional view of the bearing arrangement according to the invention according to a fourth embodiment, and
• 5 a simplified schematic sectional view of the bearing arrangement according to the invention according to a fifth embodiment.

According to the 1 to 5 includes a bearing arrangement 1 for a wheel bearing of a motor vehicle - not shown here - a non-rotatable outer ring 2 and one opposite the outer ring 2 rotatable inner ring 3 , being spatially between the outer ring 2 and the inner ring 3 rolling elements 4 are arranged by a cage 16 are guided at a distance from each other. Radially between the inner ring 3 and the outer ring 2 is also a sealing element 5 for sealing an interior 6 the bearing arrangement 1 arranged. The sealing element 5 includes three sealing lips 19 . 20a . 20b , with the first radial sealing lip 19 on the inner ring 3 and the two other axial sealing lips 20a . 20b on the start element 9 come into contact with the seal.

The inner ring 3 is on a wheel hub 8th pressed on, with a thrust element 9 sealing element side on the wheel hub 8th is pushed on and on the inner ring 3 axially comes to rest. In a roller riveting process, the wheel hub 8th a roller rivet collar 7 molded out of the inner ring 3 non-rotatable and axially fixed with the wheel hub 8th connects and the startup element 9 axially between the roller rivet collar 7 and the inner ring 3 fixed. It is therefore the starting element 9 rotationally and positionally fixed between the roller rivet collar 7 and the inner ring 3 arranged, creating a static seal of the bearing assembly 1 improved and less prone to errors.

To 1 is the starting element 9 as a stamped and formed thrust plate 9a trained, being on the thrust plate 9a a circumferential sealing ring designed as an O-ring 21 is arranged spatially between the thrust plate 9a and the Wälznietbund 7 is arranged to achieve an additional sealing effect. During the rolling riveting process, the sealing ring 21 compressed or between the stop plate 9a and the Wälznietbund 7 trapped. In the present case, the inner ring 3 a circumferential recess 22 to accommodate the thrust plate 9a and the sealing ring 21 on.

On the start element 9 is an encoder 18 arranged to, for example, by interacting with a sensor element - not shown here - a rotational speed of the rotating inner ring 3 to investigate. The stop plate 9a assigns a first axial leg 11a on that is perpendicular to a support section 11c of the thrust plate 9a is formed and in the direction of the rolling rivet collar 7 extends. The sealing ring 21 comes radially on the first axial leg 11a to the facility. The thrust plate also includes 9a a second axial leg 11b that at least partially in the sealing element 5 protrudes and a seal of the interior 6 improved against external influences. The first and second axial leg 11a . 11b in the present case extend essentially parallel to one another in opposite directions.

According to the 2 and 3 is the starting element 9 analogous to 1 also as a stop plate 9a trained, the thrust plate 9a with a first axial leg 11a on one shoulder 12 in the area of an inner surface 13 of the inner ring 3 comes to the plant. In other words, a radial seat of the thrust plate 9a formed a radial runout of the bearing assembly 1 to improve. The only difference between these two embodiments is that after 2 a second axial leg 11b that is parallel to the first axial leg 11a and perpendicular to the support section 11c of the thrust plate 9a is formed axially in the sealing element 5 protrudes and after 3 an outer surface 14 the outer ring 2 embraces. During operation of the bearing assembly 1 rotates the thrust plate 9a together with the inner ring 3 relative to the outer ring 2 , with the stop plate 9a not with the outer ring or the sealing element 5 comes into contact to avoid friction losses.

In the 4 and 5 is the starting element 9 as a thrust washer 9b formed with a substantially rectangular cross section. The circumferential edges of the thrust washer 9b can be sharp-edged or chamfered to avoid notch effects, depending on the design and requirements. The sealing element 5 is in a circumferential recess 23 the outer ring 2 radially and axially stationary. According to 4 is the thrust washer 9b radially inside the outer ring 2 and a sealing section 15 of the sealing element 5 arranged, which saves in particular axial space. Between the thrust washer 9b and the sealing section 15 is a radial gap 25 trained so that friction losses are prevented.

To 5 is the thrust washer 9b like this to the outer ring 2 arranged that there is an axial gap 26 between the outer ring 2 and the thrust washer 9b formed. The sealing section 15 of the sealing element 5 protrudes into a circumferential groove 24 on the thrust washer 9b into a labyrinth seal 17 train.

LIST OF REFERENCE NUMBERS

1

bearing arrangement

2

outer ring

3

inner ring

4

rolling elements

5

sealing element

6

inner space

7

rolling rivet

8th

wheel hub

9

thrust element

9a

start-up sheet

9b

thrust washer

10

front

11a, 11b

axial leg

11c

supporting section

12

shoulder

13

Inner surface area

14

Outer casing surface

15

sealing portion

16

Cage

17

labyrinth seal

18

encoder

19

sealing lip

20a, 20b

sealing lip

21

seal

22

recess

23

recess

24

groove

25

gap

26

gap

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

• WO 2015/120831 A1 [0002]

Claims (10)

Bearing arrangement (1) for a wheel bearing of a motor vehicle, comprising at least one outer ring (2) and at least one inner ring (3) and rolling elements (4) arranged spatially in between, a sealing element () radially between the inner ring (3) and the outer ring (2). 5) for sealing an interior space (6), the inner ring (3) being connected in a rotationally fixed and axially fixed manner to a wheel hub (8) by means of a roller rivet collar (7), a thrust element (9) being arranged in the area of the sealing element (5) , characterized in that the thrust element (9) is fixed at least axially between the roller rivet collar (7) and the inner ring (3). Bearing arrangement (1) after Claim 1 , characterized in that the thrust element (9) is designed as a thrust plate (9a). Bearing arrangement (1) according to one of the preceding claims, characterized in that at least one sealing ring (21) is arranged on the starting element (9), which is spatially between the starting element (9) and the roller rivet collar (7) or between the starting element (9) and one end face (10) of the inner ring (3) is fixed. Bearing arrangement (1) according to one of the preceding claims, characterized in that the thrust element (9) comes to rest with a first axial leg (11a) on a shoulder (12) in the region of an inner circumferential surface (13) of the inner ring (3). Bearing arrangement (1) according to one of the preceding claims, characterized in that the thrust element (9) with a second axial leg (11b) at least partially surrounds an outer circumferential surface (14) of the outer ring (2). Bearing arrangement (1) according to one of the Claims 1 to 4 , characterized in that the thrust element (9) projects at least partially into the sealing element (5) with a second axial leg (11b). Bearing arrangement (1) after Claim 1 , characterized in that the thrust element (9) is designed as a thrust washer (9b) with an essentially rectangular cross section. Bearing arrangement (1) after Claim 7 , characterized in that the thrust washer (9b) at least partially receives a sealing leg (16) of the sealing element (5) to form a labyrinth seal (17). Bearing arrangement (1) according to one of the preceding claims, characterized in that an encoder (18) is arranged on the starting element (9). Bearing arrangement (1) according to one of the preceding claims, characterized in that the sealing element (5) comprises at least one sealing lip (19, 20a, 20b), which comes into sealing contact with the inner ring (3) and / or the thrust element (9).

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