DE102019111105A1 - Rolling bearing arrangement - Google Patents

Abstract

The invention relates to a roller bearing arrangement (1), comprising a roller bearing (2) with an inner ring (3), an outer ring (4) which is formed in one piece, 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), the rolling elements (5) between the inner ring (3) and the outer ring (4) being rotatably arranged in the cage (6) at a distance from one another, the rolling elements (5) roll on the inner ring raceway (7) and the outer ring raceway (8), the rolling elements (5) being designed as rolling element rollers (9), characterized in that the cage (6) is formed in several parts, with at least two circular ring-like cage segments ( 10), the outer ring (4) comprising a receiving groove (11) on its outer ring raceway (8) in which the cage segments (10) are received.

Description

The invention relates to a rolling bearing arrangement comprising a rolling bearing with an inner ring, an outer ring which is integrally formed, rolling elements and a cage, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway, the rolling elements being rotatable between the inner ring and the outer ring in the cage are arranged at a distance from one another, the rolling elements rolling on the inner ring raceway and the outer ring raceway and the rolling elements being designed as rolling element rollers,.

State of the art

Rolling bearings are known from the prior art. There is a constant need to manufacture rolling bearings inexpensively and to assemble them easily.

In the light of the previously known prior art, it is therefore the object of the subject matter of the invention to provide a roller bearing arrangement which can be manufactured particularly easily and inexpensively.

This object is achieved by a roller bearing arrangement comprising a roller bearing with an inner ring, an outer ring that is integrally formed, rolling elements and a cage, the inner ring having an inner ring raceway and the outer ring having an outer ring raceway, the rolling elements being rotatable between the inner ring and the outer ring the cage are arranged at a distance from one another, the rolling elements roll on the inner ring raceway and the outer ring raceway, the rolling elements being designed as rolling element rollers, characterized in that the cage is formed in several parts, with at least two circular ring-like cage segments, the outer ring having a receiving groove on its outer ring raceway includes, in which the cage segments are added.

In this way it can be achieved that the roller bearing arrangement can be manufactured particularly inexpensively. Furthermore, the roller bearing arrangement according to the invention can be assembled in a simple manner. This will be explained in more detail using the exemplary embodiments.

First, the individual elements of the claimed subject matter of the invention are explained and particularly preferred embodiments of the subject matter of the invention are described below.

roller bearing

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 enable the rotation of the shaft or of the components mounted on an axle.

For this purpose, rolling rolling bodies are arranged between an inner ring and an outer ring of the roller bearing. Between these three main components, the inner ring, outer ring and the rolling elements, mainly rolling friction 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.

Inner ring

The inner ring connects the roller bearing receiving shaft with the roller bearing or the rolling elements. The shaft is connected to the side of the outer surface of the inner ring facing the shaft. The rolling elements of the rolling bearing roll on the inner ring raceway opposite this outer surface.

Outer ring

The outer ring connects the bearing receiving the rolling bearing with the rolling bearing or the rolling elements. In this case, the bearing is connected to the side of the lateral surface of the outer ring facing the bearing. The rolling elements of the rolling bearing roll on the outer ring raceway opposite this lateral surface.

Rolling elements

The rolling elements have the shape of a ball or a roller, depending on the type of rolling bearing. They roll on the raceways of the inner ring and the outer ring and have the task of transferring the force acting on the roller bearing from the outer ring to the inner ring and vice versa.

Cage

A roller bearing can have a cage, the cage guiding the rolling elements. 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 when rolling against each other, whereby an even load distribution can be achieved. According to the invention, the cage can in particular be designed as a comb cage.

Inner ring raceway

The rolling elements roll within the rolling bearing on the inner ring raceway of the inner ring. For this purpose, the surface of the inner ring raceway must be designed to be wear-resistant.

Outer ring raceway

The rolling elements roll within the rolling bearing on the outer ring raceway of the outer ring. For this purpose, the surface of the outer ring raceway must be designed to be wear-resistant.

Rolling element rollers

In comparison to rolling element balls, which have point-like contact on the raceways of the outer and / or inner ring, rolling element rollers have a linear contact and consequently a larger contact surface. As a result, rolling element rollers can withstand significantly higher radial loads than rolling element balls with high rigidity.

Comb cage

A comb cage comprises a chamber cage ring with - depending on the design - axially or radially extending axial or radial separating webs, each two adjacent webs delimiting a receiving pocket for a rolling element, the bottom of which is formed by the chamber cage ring.

Particularly preferred embodiments

According to a preferred embodiment of the invention, it can be advantageous that the cage is designed as a comb cage ring. In this way it can be achieved that comb cages can be manufactured inexpensively and can be designed in a segment-like manner in a particularly simple manner. Furthermore, comb cages leave enough space for lubricant within the roller bearing, which increases the service life of the roller bearing and reduces the rolling resistance.

It can furthermore be advantageous for the comb cage to have radial separating webs protruding from a comb cage ring, which delimit comb cage pockets that have a circular cylindrical inner contour that corresponds to the rolling element rollers, whereby the rolling elements can snap into the comb cage pockets, which is particularly important during assembly of the rolling bearing is of importance and is also explained in more detail using the exemplary embodiments.

In a further development of the invention, it can furthermore be preferred that the comb cage pockets have an opening angle between 180 ° and 270 °, particularly preferably between 185 ° and 210 °, which enables the rolling element rollers to be snapped particularly securely into the comb cage pockets.

Furthermore, it can be advantageous that the comb cage is formed from a plastic. As a result, the comb cage can be produced in a particularly simple and inexpensive manner. Furthermore, sufficient elasticity of the radial separating webs can be ensured in order to cause the rolling element rollers to snap securely into the comb cage pockets.

The invention is explained in more detail below with reference to figures without restricting the general inventive concept.

• 1 Wälzlageranordnung nach dem Stand der Technik in einer Explosionsdarstellung
• 2 Wälzlageranordnung nach dem Stand der Technik in einer perspektivischen Querschnittsansicht im zusammengebauten Zustand der Wälzlageranordnung
• 3 erfindungsgemäße Wälzlageranordnung in einer Explosionsdarstellung
• 4 Wälzlageranordnung in einer perspektivischen Querschnittsansicht im zusammengebauten Zustand der Wälzlageranordnung
• 5 Detailansicht des Kammkäfigs beim Einsetzen der Wälzkörperrollen in das Wälzlager
• 6 Detailansicht eines als Kammkäfig ausgebildeten Käfigsegments

Show it:

• 1 Rolling bearing arrangement according to the prior art in an exploded view
• 2 Rolling bearing arrangement according to the prior art in a perspective cross-sectional view in the assembled state of the rolling bearing arrangement
• 3 Rolling bearing arrangement according to the invention in an exploded view
• 4th Rolling bearing arrangement in a perspective cross-sectional view in the assembled state of the rolling bearing arrangement
• 5 Detailed view of the comb cage when inserting the rolling element rollers into the rolling bearing
• 6th Detailed view of a cage segment designed as a comb cage

The 1 shows a roller bearing arrangement according to the prior art. This rolling bearing arrangement 1 includes a roller bearing 2 with an inner ring 3 and an outer ring 4th , which is formed from two segments. When assembling the rolling bearing 2 are the rolling elements 5 that act as rolling element rollers 9 are formed, initially between the inner ring 3 and one of the segments of the outer ring 4th arranged and the cage 6th used. Then the rolling bearing 2 with the second segment of the outer ring 4th closed. The two segments of the outer ring are finally fixed by means of retaining rings by pressing the retaining rings into corresponding annular grooves in the assembled outer ring.

The 2 shows them off 1 Known roller bearing arrangement according to the prior art in a perspective cross-sectional view in the assembled state of the roller bearing arrangement.

The invention proceeds from the 1 and 2 state of the art shown and suggests those in the following 3 and 4th further developments shown, which will now be explained in more detail.

The 3 shows a roller bearing arrangement 1 , comprising a roller bearing 2 with an inner ring 3 and an outer ring 4th , which is molded in one piece. The rolling elements 5 are in a cage 6th arranged. The inner ring 3 has an inner ring raceway 7th on and the outer ring 4th an outer ring raceway 8th , the rolling elements 5 between inner ring 3 and outer ring 4th rotatable in the cage 6th are arranged spaced from each other. In the assembled state of the roller bearing arrangement 1 roll the rolling elements 5 on the inner ring raceway 7th and the outer ring raceway 8th from. The rolling elements 5 are used as rolling element rollers 9 educated.

The cage 6th is formed in several parts, with at least two circular ring-like cage segments 10 . In the 3 The embodiment shown has three circular ring-like cage segments 10 on, wherein these are designed geometrically and materially essentially the same. In the example shown, paint over the cage segments 10 an opening angle of 120 ° each.

The cage 6th is as a comb cage 13 formed, the radial dividers 14th has which comb cage pockets 15th limit the one with the rolling element rollers 9 Have a corresponding circular cylindrical inner contour open inwards. The rolling element rollers 9 are in the comb cage pockets 15th recorded and rotatably mounted. The comb cage 13 formed from a plastic, so that the radial dividers 14th when inserting the rolling element rollers 9 in the comb cage 13 in the direction of rotation of the roller bearing 2 are elastically deformable.

The outer ring 4th possesses on its outer ring raceway 8th a receiving groove 11 into which the cage segments 10 can be included. So it is possible to start with the cage segments 10 one after the other in the outer ring 4th to be arranged and then subsequently in the cage thus formed 6th the rolling element rollers 9 by axial insertion into the cage 6th to use. By using a one-piece outer ring 4th owns the rolling bearing 2 significantly better rolling and running properties, as well as a significantly higher structural stability compared to the embodiment shown from the prior art.

4th shows them off 3 known rolling bearing arrangement according to the invention 1 in a perspective cross-sectional view.

It can be seen that the rolling element rollers 9 between the inner ring 3 and the one-piece outer ring 4th are rotatably arranged, the rolling element rollers 9 in the outer ring 4th Are axially guided via two radial outboard rims. In the outer ring raceway 8th of the outer ring 4th is a circumferential groove 11 formed into which the cage 6th or the cage segments 10 added and in the axial direction in the roller bearing 2 are fixed.

5 shows a detailed view of the comb cage 13 when inserting the rolling element rollers 9 in the roller bearing 2 . In the condition shown, the comb cage 13 already in the receiving groove 11 the outer ring raceway 8th of the outer ring 4th used. The outer ring 4th has two outer ring rims pointing radially inward through which the rolling element rollers 9 in the outer ring 4th are axially guided. When inserting the rolling element rollers 9 in the roller bearing 2 are the rolling element rollers 9 pushed in the axial direction over these outer ring rims before they are completely in the comb cage pockets 15th of the comb cage 13 Snap in and between the outer ring ribs in the outer ring 4th issue. When inserting the rolling element rollers 9 become the radial dividers 14th through the rolling element rollers 9 elastic in the direction of rotation of the roller bearing 2 bent outwards, as indicated by the arrows in the 5 is indicated, and snap elastically after the complete application of the rolling element rollers 9 between the outer ring ribs in the outer ring 4th back inwards around the rolling element rollers 9 rotatable in a comb cage pocket 15th to be enclosed and secured against falling out.

6th shows a detailed view of a comb cage 13 trained cage segment 10 . The comb cage 13 points from the comb cage ring 12th protruding radial dividers 14th on which the comb cage pockets 15th limit the one with the rolling element rollers 9 have corresponding circular cylindrical inner contour open inward. The inner contour of the comb cage pockets 15th is dimensioned so that the comb cage pockets 15th the rolling element rollers 9 take up rotatably and secure against loss. The comb cage pockets show this 15th an opening angle 16 between 180 ° and 270 °, particularly preferably between 185 ° and 210 °.

The invention is not limited to the embodiments shown in the figures. The above description is therefore not to be regarded as restrictive but rather as explanatory. The following claims are to be understood in such a way that a named feature is present in at least one embodiment of the invention. This does not exclude the presence of further features. If the claims and the above description define “first” and “second” features, this designation serves to distinguish between two similar features without defining a priority.

List of reference symbols

1

Rolling bearing arrangement

2

roller bearing

3

Inner ring

4th

Outer ring

5

Rolling elements

6th

Cage

7th

Inner ring raceway

8th

Outer ring raceway

9

Rolling element rollers

10

Cage segments

11

Receiving groove

12

Comb cage ring

13

Comb cage

14th

Radial dividers

15th

Comb cage pockets

16

Opening angle

Claims (5)

Rolling bearing arrangement (1), comprising a rolling bearing (2) with an inner ring (3), an outer ring (4) which is molded in one piece, rolling elements (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) between the inner ring (3) and the outer ring (4) being arranged rotatably in the cage (6) at a distance from one another, the rolling elements (5) on the inner ring raceway (7) and the outer ring raceway (8) roll, the rolling elements (5) being designed as rolling element rollers (9), characterized in that the cage (6) is formed in several parts, with at least two circular ring-like cage segments (10), wherein the outer ring (4) comprises a receiving groove (11) on its outer ring raceway (8) in which the cage segments (10) are received. Rolling bearing arrangement according to one of the preceding claims, characterized in that the cage (6) is designed as a comb cage (13). Rolling bearing arrangement according to one of the preceding claims, characterized in that the comb cage (13) has radial separating webs (14) projecting from a comb cage ring (12), which comb cage pockets (15) delimit a circular cylindrical open inwardly corresponding to the rolling element rollers (9) Have inner contour. Rolling bearing arrangement according to one of the preceding claims, characterized in that the comb cage pockets (15) have an opening angle (16) between 180 ° and 270 °, particularly preferably between 185 ° and 210 °. Rolling bearing arrangement according to one of the preceding claims, characterized in that the comb cage (13) is formed from a plastic.

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