DE102020127289A1 - roller bearing arrangement - Google Patents

Abstract

The invention relates to a roller bearing arrangement (1), in particular a clutch release bearing for actuating a clutch arrangement within a drive train of a motor vehicle, comprising a roller bearing (2) with an inner ring (3), an outer ring (4) and rolling bodies (5), the inner ring ( 3) has an inner ring raceway (6) and the outer ring (4) has an outer ring raceway (7), wherein the rolling elements (5) are arranged in a rolling manner between the inner ring (3) and the outer ring (4), the inner ring (3) in cross section L-shaped profile with a radial inner ring leg (8), the radial inner ring leg (8) having a section (9) with a shoulder (10) protruding in the radial direction from the radial inner ring leg (8), on which a seal (11 ) is vulcanized.

Description

The invention relates to a roller bearing arrangement, in particular a clutch release bearing for actuating a clutch arrangement within a drive train of a motor vehicle, comprising a roller bearing with an inner ring, an outer ring and rolling elements, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway, the rolling elements between the inner ring and Outer ring are arranged in rolling bearings.

Clutch release bearings are known as such. The release bearing is the link between the rotating clutch pressure plate on the engine side and the stationary release mechanism on the transmission side. Thrust ball bearings are used to transmit the release forces to the clutch pressure plate. They are usually designed as roller bearings. Rolling bearings are used to transmit rotary movements and/or torques with the lowest possible friction losses. Rolling bearings are used in particular to fix axles and shafts, whereby, depending on the design, they absorb radial and/or axial forces and at the same time allow the shaft or the components mounted on an axle to rotate. For this purpose, rolling elements are arranged between an inner ring and an outer ring of the roller bearing. Between these three main components, inner ring, outer ring and the rolling elements, it is mainly rolling friction that occurs within the rolling bearing. Since the rolling elements in the inner and outer ring usually roll on hardened steel surfaces with optimized lubrication, the rolling friction of these bearings is relatively low.

A clutch release bearing essentially consists of three parts: The inner ring, which is fixed in the system and is attached to the release lever with a clamp - The outer ring, which is freely rotatably mounted independently of the inner ring, with the bearing being arranged between the inner ring and the outer ring, in a cage arranged rolling elements as well as a so-called guide bush or an axial bearing, which (s) on the gear shaft ensures the precise function.

Various types of clutch release bearings are known from the applicant's range. Furthermore, from the DE 10 2004 034 439 A1 a clutch release bearing is known. This release bearing includes a roller bearing which has a torsionally rigid inner ring and a rotatable outer ring.

The object of the present invention is to reduce the production costs of a roller bearing arrangement, in particular a clutch release bearing for actuating a clutch arrangement within a drive train of a motor vehicle, and at the same time to prevent a high sealing effect of the seal from the ingress of unwanted contaminants into the interior of the bearing.

This object is achieved by a roller bearing arrangement, in particular a clutch release bearing for actuating a clutch arrangement within a drive train of a motor vehicle, comprising a roller bearing with an inner ring, an outer ring and rolling elements, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway, the rolling elements between The inner ring and outer ring are arranged in rolling bearings, the inner ring having an L-shaped profile in cross section with a radial inner ring leg, the radial inner ring leg having a section with a shoulder that protrudes in the radial direction from the radial inner ring leg and on which a seal is vulcanized.

As a result, a seal can be connected to the inner ring without a further manual assembly step, which reduces both the manufacturing costs and the assembly effort.

First, the individual elements of the claimed subject matter of the invention are explained in the order in which they are mentioned in the set of claims, and particularly preferred configurations of the subject matter of the invention are described below.

Rolling bearings can be used in particular to enable rotary movements with the lowest possible friction losses. Rolling bearings can be used in particular to fix and/or mount axles and shafts, depending on the design, absorbing radial and/or axial forces and at the same time enabling the rotation of the shaft or the components mounted on an axle in this way.

For this purpose, rolling elements are arranged between an inner ring and an outer ring of the roller bearing. Between these three main components, inner ring, outer ring and the rolling elements, it is usually mainly rolling friction that occurs within the rolling bearing. Since the rolling elements in the inner and outer ring can preferably roll on hardened steel surfaces with optimized lubrication, the rolling friction of such bearings is relatively low. A roller bearing can have one or more rows.

Under clutch release bearing arrangement arrangements are ver in the sense of the invention stood, the central component of which includes a clutch bearing, which, however, can also include other elements.

The inner ring can in particular connect the shaft accommodating the roller bearing to the roller bearing or the roller bodies. In particular, the shaft can be connected to the side of the lateral surface of the inner ring facing the shaft, with the rolling elements of the roller bearing rolling on the inner ring raceway opposite this lateral surface. The inner ring can be made of a metallic and/or ceramic material. In principle, it is conceivable to design the inner ring in one piece or in multiple pieces, in particular in two pieces.

The outer ring can, in particular, connect the bearing arrangement accommodating the roller bearing to the roller bearing or the roller bodies. In particular, the bearing can be connected to the side of the lateral surface of the outer ring facing the bearing, the rolling elements of the roller bearing rolling on the outer ring raceway opposite this lateral surface. The outer ring can be made of a metallic and/or ceramic material. In principle, it is conceivable to design the outer ring in one piece or in multiple pieces, in particular in two pieces.

Depending on the type of rolling bearing, the rolling elements have the shape of a ball or a roller. They roll on the raceways of the roller bearing and have the task of transferring the force acting on a radial roller bearing from the outer ring to the inner ring and vice versa. In an axial roller bearing, the rolling elements transmit the forces acting on the axial roller bearing between the running disks. Roller-shaped rolling elements are also referred to as roller rolling elements and spherical rolling elements as bearing balls.

Roller-shaped rolling bodies can be selected, for example, from the group of symmetrical spherical rollers, asymmetrical spherical rollers, cylindrical rollers, needle rollers and/or tapered rollers.

Rolling elements can be guided and spaced apart in a cage or by rolling element spacers. In principle, it is also conceivable to design a roller bearing without a cage, which is also referred to as a full complement roller bearing. In full complement rolling bearings, adjacent rolling elements can contact each other.

The rolling bodies can roll within the rolling bearing, in particular on the inner ring raceway of the inner ring. For this purpose, the surface of the inner ring raceway can advantageously be designed to be correspondingly abrasion-resistant, for example also by means of a corresponding surface treatment method and/or by applying a corresponding additional layer of material.

The inner ring raceway can be flat or profiled. A profiled design of the inner ring raceway can be used, for example, to guide the rolling elements on the inner ring raceway. On the other hand, a planar formation of the inner ring raceway can, for example, allow a certain axial displaceability of the rolling elements on the inner ring raceway.

The rolling bodies can roll within the rolling bearing, in particular on the outer ring raceway of the outer ring. For this purpose, the surface of the outer ring raceway can advantageously be designed to be abrasion-resistant, for example by means of a corresponding surface treatment process and/or by applying a corresponding additional layer of material.

The outer ring raceway can be flat or profiled. A profiled design of the outer ring raceway can be used, for example, to guide the rolling elements on the outer ring raceway. On the other hand, a planar shape of the outer ring raceway can, for example, allow a certain axial displaceability of the rolling elements on the outer ring raceway.

A roller bearing may have a seal to prevent lubricant from escaping from the roller bearing or dirt or moisture from entering the roller bearing. For this purpose, the seals used can be provided with one or more sealing lips, which can rest against a component of the roller bearing. These are designed in such a way that on the one hand they seal the bearing for as long as possible over the entire service life, and on the other hand the friction caused by the adjacent seal is not too high. It is particularly preferred that the seal is formed from an elastic, particularly preferably rubber-elastic material. The elastic material can preferably consist entirely or partially of an elastomer, the elastomers in turn preferably being selected from the group of vulcanizates of natural rubber and silicone rubber.

According to a preferred embodiment of the invention, it can be advantageous for the seal to be in the form of a sealing ring.

Furthermore, it can be advantageous for the seal to have a sealing lip which bears against the outer ring.

The invention will be explained in more detail below with reference to figures without restricting the general inventive idea. The figures are only of a schematic nature and serve exclusively for understanding the invention. The same elements are provided with the same reference numbers. The different features of the various exemplary embodiments can also be freely combined with one another within what is technically feasible.

• 1 eine erfindungsgemäße Wälzlageranordnung in einer schematischen Querschnittsansicht, und
• 2 einen Innenring in einer perspektivischen Teilschnittansicht.

Show it:

• 1 a roller bearing arrangement according to the invention in a schematic cross-sectional view, and
• 2 an inner ring in a perspective partial sectional view.

1 1 shows an embodiment of a roller bearing arrangement 1 according to the invention. This is configured as a clutch release bearing for actuating a clutch arrangement within a drive train of a motor vehicle. The roller bearing arrangement 1 comprises a roller bearing 2 with an inner ring 3, an outer ring 4 and rolling elements 5.

The inner ring 3 has an inner ring raceway 6 and the outer ring 4 has an outer ring raceway 7 . The rolling bodies 5 are arranged in a rolling manner between the inner ring 3 and the outer ring 4 . The inner ring 3 has an L-shaped profile in cross section with a radial inner ring leg 8, the radial inner ring leg 8 in turn having a section 9 with a shoulder 10 protruding in the radial direction from the radial inner ring leg 8, on which a seal 11 is vulcanized. The seal 11 is thus bonded to the section 9 and/or the shoulder 10 . There is thus no need to arrange the seal 11 on the inner ring 3 in a manual assembly step. The seal 11 is designed as a sealing ring 12 and has a sealing lip 13 which bears against the outer ring 4 .

The invention is not limited to the embodiments shown in the figures. The foregoing description is therefore not to be considered as limiting but as illustrative. The following patent claims are to be understood in such a way that a mentioned feature is present in at least one embodiment of the invention. This does not exclude the presence of other features. If the patent claims and the above description define 'first' and 'second' feature, this designation serves to distinguish between two similar features without establishing a ranking.

Reference List

1

roller bearing arrangement

2

roller bearing

3

inner ring

4

outer ring

5

rolling elements

6

inner ring raceway

7

outer ring raceway

8th

radial inner ring leg

9

section

10

shoulder

11

poetry

12

sealing ring

13

sealing lip

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was 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.

Patent Literature Cited

• DE 102004034439 A1 [0004]

Claims (3)

Rolling bearing arrangement (1), in particular a clutch release bearing for actuating a clutch arrangement within a drive train of a motor vehicle, comprising a rolling bearing (2) with an inner ring (3), an outer ring (4) and rolling bodies (5), the inner ring (3) having an inner ring raceway (6) and the outer ring (4) has an outer ring raceway (7), the rolling bodies (5) being arranged in a rolling manner between the inner ring (3) and the outer ring (4), characterized in that the inner ring (3) has a L-shaped profile with a radial inner ring leg (8), the radial inner ring leg (8) having a section (9) with a shoulder (10) protruding in the radial direction from the radial inner ring leg (8), on which a seal (11 ) is vulcanized. Rolling bearing arrangement (1), after claim 1 , characterized in that the seal (11) is designed as a sealing ring (12). Rolling bearing arrangement (1) according to one of the preceding claims, characterized in that the seal (11) comprises a sealing lip (13) which bears against the outer ring (4).

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