DE102014213437A1 - Rolling bearing cage component and multi-part roller bearing cage - Google Patents

Abstract

The invention relates to a roller bearing cage component (11, 31) comprising a ring (12) and web elements (13, 14, 15, 16) which extend in the axial direction from the ring (12, 31), each having at least one rolling body contact surface (21, 22) directed in the circumferential direction , 23, 24). To reduce the variety of components and to simplify the production, it is proposed according to the invention, first web elements (15, 16) for connecting the Wälzkörperkäfigbauteils (11, 31) with another Wälzkörperkäfigbauteil (11, 31) and second web elements (13, 14) as a non-connectable stub train. As a result, less material is consumed and additional lubricant reservoirs (19, 20) are created.

Description

Field of the invention

The invention relates to a roller bearing cage component, comprising a ring and in the axial direction of the ring outgoing web elements each having at least one directed in the circumferential direction Wälzkörperanlauffläche. Furthermore, the invention relates to a multi-part roller bearing cage with such rolling bearing cage components and a rolling bearing cage formed from similar rolling bearing cage components.

Background of the invention

Rolling bearing cages have the function, in the context of a rolling bearing or a rolling bearing assembly properly spaced rolling elements and to perform in accordance with the operation. Rolling bearing cages are widely used in mechanical engineering, the basic aim being to reduce the friction between rotatable or at least moving parts. The simplification and the cost-efficient production are opposed by the functions and precision specifications of the rolling bearing cages. Each rolling bearing cage per se forms a compromise within this field of tension. For this purpose, the prior art offers a number of possible options, including, for example, plastic cages, metal cages, multi-part cages, snap cages, etc.

Out DE 33 41 970 A1 a two-part roller bearing cage is known, which is formed from two rolling bearing cage components, which can be plugged together. The teaching is dedicated to the risk of web deformation at high centrifugal forces, which is compensated by the fact that radially outer webs engage with their free ends in an undercut of the side ring of the other cage part. This simplifies the production and yet is suitable for high speeds.

Out EP 1 832 765 B1 For example, a method of manufacturing a rolling bearing cage is known, wherein the rolling bearing cage is made by means of a metal-based strip material and is formed of two similar interconnectable rings. The connectable rings are connected in fastening areas by a deformation of a holding element, wherein a positive connection between the rings is produced by the deformation. For most radial cages, the web length is determined by the length of the rolling elements, which acts as a minimum length, which ultimately leads to a high minimum amount of cage material.

The prior art rolling bearing cages have been proven in the past, however, in the field of rolling bearing technology, new developments and improvements are constantly required to meet customer requirements.

Object of the invention

The invention has for its object to provide a multi-part roller bearing cage, which is simple and inexpensive to produce, but otherwise also has the proven properties of a roller bearing cage.

Description of the invention

In a rolling bearing cage component or a roller bearing cage of the type mentioned, the object is achieved in that first web elements are formed for connecting the Wälzlagerkäfigbauteils with another Wälzlagerkäfigbauteil and second web elements as unverbindliche stub. It is not necessary that each web element compulsorily produces a positive connection or a frictional connection or a different type of connection between two rings of a roller bearing cage. It is sufficient if the web element is defined by the fact that it forms a Wälzkörperanlauffläche for the one or more rolling elements, in order to transmit forces between the rolling elements for spacing. It is advantageous that, for example, more space is created, which can be used for lubrication, in particular for fat deposits. In addition, reduces the required cage material, which has an advantageous effect on the cost and fuel consumption.

The second web elements are thus not provided for establishing a connection between the rings. By contrast, the first web elements are used to establish a connection between the two rings. The two rings are basically intended to give the multi-part roller bearing cage stability and optionally also have a guiding function, whereby the rolling bearing cage can be held in relation to the rotating partners in the correct position. The decisive factor is that only the first web elements for connecting the roller bearing cage component with another rolling bearing cage component, which may be identical or similar, are provided.

In the case of a cylindrical roller bearing, for example, it is such that only the length of the first web elements is predefined by the length of the cylindrical rollers, wherein the axial length of the two connected first web elements together must exceed the axial length of a cylindrical roller. The axial length of the designed as a stub second web elements can only in dependence be dimensioned by the required size of Wälzkörperanlaufflächen.

Advantageously, the rolling bearing cage component or the rolling bearing cage components can be made of plastic or metal. This can be selected depending on the size of the bearing or depending on its operating speed.

Advantageously, the rolling bearing cage component is formed from a strip material, which has preferably been produced on a metal basis. Such band material can be easily cut and reshaped so that connection areas and partially formed rolling body pockets can be formed. Alternatively, the rolling bearing cage components are made of plastic, wherein a high variation width for the connection mechanism is available by the known spraying method. Thus, the first web elements can be provided to enter into a traction or a form fit or both together.

In an advantageous embodiment, two rolling bearing cage components, which together form a roller bearing cage, be identical rolling bearing cage components, which are connected to each other for positive or positive connection with each other by a certain angle. It makes sense that the first web elements are diametrically opposed for better stability properties. However, this is not mandatory. For stability improvement, different numbers of web elements can be provided so that the ratio of first web elements to second web elements increases. A typical ridge ratio of first ridge elements to second ridge elements is 1/2 or 1/3. For example, a more stable rolling element cage could have a fin element ratio of one. This can be chosen depending on the particular application.

In an advantageous embodiment, the roller bearing cage component and the further rolling bearing cage component are identical or at least similar components. It is advantageous that the number of components of different components of the rolling bearing cage decreases and thus creates a manufacturing advantage in the component inventory. The rolling bearing cage is completely covered by the production of only a single rolling bearing component (in correspondingly larger numbers).

The object is achieved in a Wälzkörperkäfig of the type mentioned in that it has two mutually positively or non-positively connected Wälzlagerkäfigbauteile invention. This is not precluded that the Wälzkörperkäfig further components, such as fasteners, brackets, sensor elements or elements of various kinds. Conversely, it is advantageous if at the first web elements each have a separation side with at least one connecting element, such as a latching nose, a Locking edge, or the like, are designed for connection to the further rolling bearing cage component. This is particularly easy to produce in a plastic cage by injection molding, which means that such fasteners must not be additionally attached or supplied during manufacture.

The object is further achieved by a roller bearing cage component having two identical or similar formed Wälzkörperkäfigbauteile, wherein the Wälzkörperkäfigbauteile together form the Wälzkörpertaschen and circumferentially between the Wälzkörpertaschen be attached to mounting areas by means of snap-in connectors.

Thus, the teaching of the invention is not only advantageous in particular in plastic cages, but can also be used in particular in molded from strip material Wälzkörperkäfigen, which are designed at least in two parts. At an output workpiece made of strip material, for example, by pressing or stamping attachment areas can be formed, which in the circumferential direction alternately partially formed Wälzkörpertaschen, further also called half-pockets, form. Advantageously, the connecting elements are also formed in the same pressing or embossing process.

In Wälzkörperkäfigbauteilen, which are particularly similar or even identical, can be made by a rotationally offset arrangement, a connection between the attachment areas, with which the attachment areas have different fasteners in the circumferential direction.

Brief description of the drawings

In the following the invention will be further described and explained with reference to the embodiments given in the attached drawings. Like reference numerals in different figures refer to the same components or elements. Showing:

1 an exploded view of a cylindrical roller bearing with two identical rolling bearing cage components,

2 the assembled cylindrical roller bearing for 1 .

3 an enlarged section of the cylindrical roller bearing of 2 .

4 an exploded view of a ball bearing with a Wälzkörperkäfig of two identical Wälzkörperkäfigbauteilen of strip material, and

5 the ball bearing off 4 in the assembled state.

Detailed description of the drawings

The 1 . 2 and 3 show a cylindrical roller bearing with a two-piece roller bearing cage from the two rolling bearing cage components 11 , The cylindrical rollers 10 can after the production of the positive connection 25 the two rolling bearing cage components 11 be snapped by radially outward into the Wälzkörpertaschenaschen. Before the production of the positive connection 25 by means of the connecting elements 17 . 18 , namely the locking groove 17 and the latch 18 , These are by means of a relatively between the rolling bearing cage components 11 executed rotation of 90 ° out of a mirrored position moves into a connecting position, so that locking grooves 17 and latching noses 18 standing in pairs axially opposite.

The gaps 19 . 20 are as a lubricant reservoir, especially grease reservoir 19 . 20 , usable or simply reduce the total weight of the rolling bearing cage. Substantially material is saved, it being recognized that the stub of the second web members 13 . 14 must not be connected and therefore a traditional design criterion must not be met, namely that the rolling element length should be considered in the axial direction as a minimum web length.

The 4 and 5 show a metal cage from the rolling bearing cage components 31 , which are made of metallic strip material. Alternating in the circumferential direction are attachment areas 34 and half-pockets 33 arranged. Alternatively, the band material is made of plastic.

For connecting two rolling bearing cage components 31 is only a rotation of 36 degrees from an axial mirror position of the two rolling bearing cage components 31 required. This is achieved by drilling yourself 35 and the two-part locking head 32 in the circumferential direction on the attachment areas 34 alternate. After an axial merging of the two rolling bearing cage components 31 the detent heads snap 32 in the holes 35 one.

LIST OF REFERENCE NUMBERS

10

 Rolling elements / cylindrical roller

11

 Rolling bearing retainer component

12

 ring

13

 second web element / stub

14

 second web element / stub

15

 first web element

16

 first web element

17

 Connecting element / locking groove

18

 Connecting element / locking lug

19

 grease reservoir

20

 grease reservoir

21

 Wälzkörperanlauffläche

22

 Wälzkörperanlauffläche

23

 Wälzkörperanlauffläche

24

 Wälzkörperanlauffläche

25

 positive-locking connection

30

 Rolling element / ball

31

 Wälzkörperkäfigbauteil

32

 Rastkopf

33

 half pocket

34

 fastening area

35

 drilling

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 3341970 A1 [0003]
• EP 1832765 B1 [0004]

Claims (4)

Rolling bearing cage component ( 11 . 31 ), having a ring ( 12 . 31 ) and in the axial direction of the ring ( 12 . 31 ) outgoing web elements ( 13 . 14 . 15 . 16 ) each having at least one circumferentially directed Wälzkörperanlauffläche ( 21 . 22 . 23 . 24 ), characterized in that first web elements ( 15 . 16 ) for connecting the roller bearing cage component ( 11 . 31 ) with a further roller bearing cage component ( 11 . 31 ) and second web elements ( 13 . 17 ) are designed as non-connectable stubs. Rolling bearing cage component ( 11 . 31 ) according to claim 1, characterized in that the rolling bearing cage component ( 11 . 31 ) and the further rolling bearing cage component ( 11 . 31 ) are the same or at least similar components. Wälzkörperkäfig, comprising two mutually positively or non-positively connected Wälzlagerkäfigbauteile ( 11 . 31 ) according to any one of the preceding claims. Rolling bearing cage comprising two identical or similar deformed rolling element cage components ( 12 . 31 ), wherein the rolling bearing cage components ( 12 . 31 ) together form the Wälzkörpertaschen and circumferentially between the Wälzkörpertaschen at mounting areas ( 34 ) by means of snap-in connectors ( 32 . 35 ) are interconnected.

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