DE102020123868A1 - roller bearing arrangement - Google Patents

Abstract

The invention relates to a rolling bearing arrangement (1), comprising a rolling bearing (2) with an inner ring (3), an outer ring (4), rolling bodies (5) and a cage (6), the inner ring (3) having an inner ring raceway (7) and the outer ring (4) has an outer ring raceway (8), wherein the rolling elements (5) are mounted between the inner ring (3) and the outer ring (4) in the cage (6) and are spaced apart from one another, with the inner ring (3) being in axial direction between a first inner ring end face (9) and the inner ring raceway (7) in cross-section has a first inner ring section (10) which slopes down towards the inner ring raceway (7) in the radial direction inwards and/or the outer ring (4) in the axial direction between a first outer ring end face (11 ) and the outer ring raceway (8) in cross section has a first outer ring section (12) that rises outwards in the radial direction towards the outer ring raceway (8), so that a first roller bearing interior (13) is defined, which has a trapezoidal contour in cross section.

Description

The invention relates to a roller bearing arrangement, comprising a roller bearing with an inner ring, an outer ring, roller bodies and a cage, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway, the roller bodies between the inner ring and the outer ring being mounted in the cage in a rolling manner and spaced apart from one another .

Rolling bearings are known from the prior art. There is a continuing need to manufacture roller bearings as cost-effectively as possible and to make them durable.

It is therefore the object of the invention to provide a roller bearing arrangement that can be produced cost-effectively and is durable.

This object is achieved by a rolling bearing arrangement, comprising a rolling bearing with an inner ring, an outer ring, rolling bodies and a cage, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway, the rolling bodies between the inner ring and the outer ring being mounted in the cage at a distance from one another are arranged, characterized in that the inner ring has in the axial direction between a first inner ring end face and the inner ring raceway in cross section a first inner ring section which slopes down inwards in the radial direction in the radial direction and/or the outer ring has in the axial direction between a first outer ring end face and the outer ring raceway in cross section a Outer ring raceway in the radial direction outwards increasing extending first outer ring portion, so that a first roller bearing interior is defined, which has a trapezoidal contour in cross section.

The trapezoidal design of the roller bearing interior increases the surface volume in comparison to axially extending ring sections, as a result of which the filling arc can be increased beyond the existing range of 180 to 190 degrees. Furthermore, less load is required to expand the outer ring and/or the inner ring.

The outer ring or inner ring sections can be deformed during the filling of the rolling elements in such a way that they essentially extend in the axial direction.

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.

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, with 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. Roll-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.

A roller bearing can have a cage, with the cage guiding the rolling bodies. The cage is designed in such a way that the rolling element balls and/or the rolling element rollers are spaced apart from one another so that, for example, the friction and heat development of the rolling elements is kept as low as possible.

Furthermore, the cage keeps the rolling element balls and/or rolling element rollers at a fixed distance from one another during rolling, as a result of which an even load distribution can be achieved. The cage can be made in one piece or in several pieces.

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.

According to a preferred embodiment of the invention, it can be advantageous for the inner ring to have a second inner ring section in the axial direction that slopes inwards in the radial direction between a second inner ring end face, which is opposite the first inner ring end face, and the inner ring raceway in cross section, and/or the outer ring in the axial direction between a second outer ring end face, which is opposite the first outer ring end face, and the outer ring raceway in cross section has a second outer ring section that rises outwards in the radial direction, so that a second roller bearing interior is defined, which has a trapezoidal contour in cross section.

• 1 ein erfindungsgemäßes Wälzlager in einer schematischen Querschnittsdarstellung.

The invention will be explained in more detail below with reference to drawings without restricting the general inventive concept. The drawings are only schematic in nature and are only intended 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. It shows:

• 1 a roller bearing according to the invention in a schematic cross-sectional view.

1 shows a roller bearing arrangement 1 with a roller bearing 2 with an inner ring 3, an outer ring 4, rolling elements 5 and a cage 6. The inner ring 3 has an inner ring raceway 7 and the outer ring 4 has an outer ring raceway 8, with the rolling elements 5 between the inner ring 3 and the outer ring 4 are mounted rolling in the cage 6 spaced apart.

The inner ring 3 has in the axial direction between a first inner ring end face 9 and the inner ring raceway 7 in cross-section a first inner ring section 10 which slopes down in the radial direction inwards towards the inner ring raceway 7. The outer ring 4 in turn has a cross-section in the axial direction between a first outer ring end face 11 and the outer ring raceway 8 to the outer ring raceway 8 in the radial direction outwards increasing first outer ring section 12, so that a first roller bearing interior 13 is defined, which has a trapezoidal contour in cross section.

The inner ring 3 also has, in the axial direction, between a second inner ring end face 14, which is opposite the first inner ring end face 9, and the inner ring raceway 7, in cross section, a second inner ring section 15, which slopes down in the radial direction inwards. The outer ring 4 in turn has in the axial direction between a second outer ring end face 16, which is opposite the first outer ring end face 11, and the outer ring raceway 8 in cross section has a second outer ring section 17 that rises outwards in the radial direction, so that a second roller bearing interior 18 is defined, which has a trapezoidal contour in cross section.

The invention is not limited to the embodiment shown in the drawing. 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

Cage

7

inner ring raceway

8th

outer ring raceway

9

first inner ring face

10

first inner ring section

11

first outer ring face

12

first outer ring section

13

first roller bearing interior

14

second inner ring face

15

second inner ring section

16

second outer ring face

17

second outer ring section

18

second roller bearing interior

Claims (2)

Rolling bearing arrangement (1), comprising a rolling bearing (2) with an inner ring (3), an outer ring (4), rolling bodies (5) and a cage (6), the inner ring (3) having an inner ring raceway (7) and the outer ring (4) has an outer ring raceway (8), the rolling elements (5) being mounted in rolling fashion between the inner ring (3) and the outer ring (4) in the cage (6) and spaced apart from one another, characterized in that the inner ring (3) in the axial direction between a first inner ring end face (9) and the inner ring raceway (7) in cross section has a first inner ring section (10) which slopes down inwards in the radial direction towards the inner ring raceway (7) and/or the outer ring (4) in the axial direction between a first outer ring end face (11) and the outer ring raceway (8) in cross section has a first outer ring section (12) that rises outwards in the radial direction towards the outer ring raceway (8), so that a first roller bearing interior (13) is defined, wel cher has a trapezoidal contour in cross section. Rolling bearing arrangement (1), after claim 1 , characterized in that the inner ring (3) in the axial direction between a second inner ring end face (14), which is opposite the first inner ring end face (9), and the inner ring raceway (7) in cross section has a second inner ring section (15) which slopes inwards in the radial direction , and/or the outer ring (4) in the axial direction between a second outer ring end face (16), which is opposite the first outer ring end face (11), and the outer ring raceway (8) in cross section has a second outer ring section (17) which rises outwards in the radial direction, so that a second roller bearing interior (18) is defined, which has a trapezoidal contour in cross section.

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