DE102007002357A1 - Multi-part pocket cage for a roller bearing and roller bearing with the pocket cage - Google Patents

Abstract

The invention relates to a multi-part pocket cage for a roller bearing and a roller bearing with this pocket cage. Rolling element bearings generally consist of an outer ring, an inner ring and a plurality of rolling elements, which are often held between outer ring and inner ring in a Wälzkörperkäfig. The Wälzkörperkäfig serves in particular to separate the rolling elements from each other and to keep the rolling elements at an equal distance from each other. There is a multipart pocket cage 5; 24 for a roller bearing 1; 20 proposed, with a sheet metal cage ring 11; 27, in the pockets 18 for receiving rolling elements 4; 23 are introduced and the part of the pocket cage 5; 24 forms, and with at least one support ring 14, 15; 25, 26, connected to the sheet metal cage ring 11; 27 is firmly connected to the Verteif and forms another part of the pocket cage.

Description

Field of the invention

The The invention relates to a multipart pocket cage for a rolling element bearing and a roller bearing with this pocket cage.

roller bearing generally consist of an outer ring, an inner ring and a plurality of rolling elements interposed between Outer ring and inner ring often in a Wälzkörperkäfig being held. The rolling element cage serves in particular to the rolling elements separate from each other and the rolling elements in one keep equal distance from each other.

Usually is between at the Wälzkörperkäfigen Sheet cages and solid cages distinguished, the sheet metal cages are made of stamped and bent metal bands whereas the massive cages are for example machined or - in the case of plastic cages - by injection molding getting produced. Compared to massive cages the metal cages have a lower weight, whereas the massive cages for higher load requirements are designed.

The publication AT 391744B describes a formed of sheet metal pocket cage for a rolling bearing, which side rings and interposed webs having material weakenings in the central region, so that form due to the predetermined bending points formed by the webs in a deformation of the pocket cage by axially merging the side rings radial projections which the Separate rolling elements safely.

The publication DE 10031427C2 on the other hand treats large rolling bearings, which are used for example in rolling mills, and which have so-called pin cages. The pin cage consists of two parallel arranged cage discs, which are interconnected by a plurality of bolts, each pin carries a rolling element, such as a cylindrical roller. For receiving the bolts, the rolling elements each have a central bore. The bolt is usually provided at one end with a thread which is screwed into the one cage disc. The other end of the bolt is firmly welded after mounting the cage in the rolling bearing with inserted rolling elements on the other cage disc.

The The object underlying the invention is to provide a new cage design and a rolling bearing with a cage in this To propose cage design, which is a simple, inexpensive construction and / or versatile applications.

This Task is by a multipart pocket cage for a rolling element bearing with the features of the claim 1 and with a roller bearing with the features of claim 7 solved. Preferred and / or advantageous Embodiments of the invention will become apparent from the dependent Claims and the following description and the attached drawings.

According to the invention a multi-part pocket cage for a roller bearing, In particular radial roller bearings, proposed, wherein the Wälzkörperlager in any bearing design, especially as Tapered roller bearing or cylindrical roller bearing is formed. Prefers the rolling element bearing has an outer ring and an inner ring, between which the rolling elements are stored in the pocket cage. The pocket cage has in particular the task, the rolling elements separate, keep the same distance from each other, to prevent the falling out of the rolling element bearings and / or rolling elements in an unloaded zone of the warehouse.

Of the Pocket cage has a sheet metal cage ring, in the pockets or windows for receiving the rolling elements are introduced and the one part of the multi-part pocket cage forms.

to Stiffening of the sheet cage ring is this with at least a support ring firmly connected, so fabric, form and / or positively connected. In the manufacture of the pocket cage are the sheet metal cage ring and the at least one support ring formed as separate, separate parts.

The inventive construction of the multipart bag body leads to a multitude of advantages: through the connection the sheet cage ring with the at least one support ring arises in cost-effective production of a rigid structure with high load capacity. Sheet metal cage ring and support ring can be independent of each other, different according to the load be dimensioned. In particular, for Support ring and sheet metal cage different Liche materials to get voted. In this way, load-appropriate and at the same time material-saving and thus weight-reduced pocket cages be prepared for a rolling element bearing. Another advantage of the production is that the rolling elements - such as Example at the known bolt cages - not more need to be pierced, as the leadership and the spacing of the rolling elements over the Sheet metal cage ring with the bags done.

In a preferred structural implementation of the sheet metal cage ring is made of a pocket tape or consists of this. The sheet metal cage ring is optionally formed in one piece or from several pocket band segments. Before zugt is the pocket tape elastic and / or rigid, so that it can be bent annular during manufacture and connected to the free ends, for example, cohesively. Optionally, the sheet metal cage ring has a conical course in the axial direction.

Prefers is the sheet metal cage ring and / or the pocket band and / or the support ring formed as a stamped and bent part or stamped part. This embodiment again emphasizes the inventive idea, to use a low cost manufacturing process. The Pocket tape is preferably made of steel. Alternatively, you can the sheet metal cage ring and / or the pocket band and / or the Cut support ring, in particular laser cut, or be milled.

The placed in the sheet metal cage ring and / or in the pocket band Bags are with their inner shape or inner contour to the Outer shape of the rolling elements adapted, the contact between the rolling elements and the inner contour of the pockets point, line or sheet-shaped is. Preferably, transverse webs arranged between the pockets, which separate the rolling elements from each other, in one Cross section perpendicular to the axial extent of the pocket cage Conically rounded in the radial direction and / or on both sides and / or bevelled trained. The inner shape of the pockets is preferably done by the punching process.

at a practical and therefore advantageous implementation is the least a support ring as a simple ring or disc ring or Ring disc, preferably made of steel or another claim appropriate Metal, formed. As a possible embodiment is the support ring in several parts and / or of several segments educated.

at a preferred embodiment, the sheet metal cage ring in the axial direction on both sides in each case a radially encircling, in particular radially continuous peripheral side edge section, which is each connected to one of the support rings. The support rings are preferably in axial extension the sheet cage ring arranged or surround each one Side edge portion or each of a side edge portion encompassed. In this constructive embodiment of the sheet metal cage ring by the support rings arranged on both sides mechanically stiffened, in particular such that a pocket cage formed whose load capacity is the load capacity of a massive cage matches or comes close. The pocket cage is in this case at least or formed exactly in three parts.

at a preferred embodiment of the invention, the at least a support ring or the sheet metal cage ring locking devices, preferably axially in the direction of the pocket cage interior directed, in particular molded or mounted locking lugs, z. B. in the form of bolts or pins, on, for receiving Rolling elements are formed. Preferred are the Molded locking lugs so realized that the rolling elements can be hung and / or clipped, in particular such that the rolling elements after the assembly are held captive and / or prevented falling out.

One Another object of the invention relates to one or the aforementioned Rolling element bearings, in particular radial roller bearings, which a multipart pocket cage according to one of previous claims and / or according to the previous description.

at a preferred embodiment, the rolling element bearing a plurality of rolling elements, which piercing free and / or are formed of bearing steel. As already mentioned above, the previously used and known Bolt cages Rolling elements with through holes on, which are designed to receive the bolts. The need This through holes causes the rolling elements for strength reasons from case hardened steel must be manufactured, resulting in increased production costs leads. By the use of the invention Pocket cage eliminates the need for through-holes, so that the cheaper rolling bearing steels can be used for the rolling elements.

at a preferred embodiment of the or the support rings - in particular depending on the bearing design and the design the outer or inner ring of the rolling element bearing, in particular depending on the position of the shelves and / or the design of the shelves (fixed or screwable) - radially outer side or arranged radially inside the sheet metal cage ring. In other words, the support rings on or under the pocket strap of the pocket cage sit, that is, they are the outer ring or facing the inner ring. These preferred developments allow the multipart pocket cage to different Types of rolling element bearings or Adapt applications.

In a preferred embodiment, the pocket cage is installed as a preassembled unit with or without preassembled rolling elements in the rolling element bearing. In contrast to the previously used bolt cage, which are assembled and welded in the assembled rolling element bearing, which leads to contamination with slag and weld beads and to the delay of the cage can, the multi-part pocket cage is preferably already assembled before insertion into the rolling element bearing, so that a preassembled unit is installed in the rolling element bearing, in particular without this affected by the assembly process or pollute by emissions. Whether the rolling elements or rollers are installed before the insertion of the pocket cage into the roller bearing, in particular in the rings of the roller bearing, or thereafter depends in particular on the existing Borden on the outer or inner ring of the roller bearing.

Especially Preferably, the rolling element bearing is a large warehouse or slewing bearings trained. As a large warehouse in particular rolling element bearing with a Outer diameter greater than 300 mm, preferably greater than 420 mm and in particular larger regarded as 1000 mm. In such large camps is the Use of sheet metal cages due to the high mechanical Load unusual, whereas the new multipart pocket cage due the stiffening by the support rings according to load can be designed.

Especially the rolling element bearing can have screwed-on bores, the for assembly or disassembly of the multipart pocket cage, in particular as a preassembled unit, can be unscrewed.

A particularly preferred design of the new, multi-part pocket cage has two formed as cage side discs support rings on the side edges of the pocket tape of the sheet cage ring are firmly connected. The rolling elements, in particular the rollers are no longer pierced and thus can made of "standard" roller bearing steel, the leadership and the spacing of the rollers over the pocket tape is implemented.

Further Features, advantages and effects of the invention will become apparent the following description of preferred embodiments the invention and the accompanying figures. These show:

1 a tapered roller bearing as a first embodiment of the invention in a sectional, schematic, three-dimensional representation;

2 the tapered roller bearing in 1 in a schematic, three-dimensional representation obliquely from above;

3 a cylindrical roller bearing as a second embodiment of the invention in a sectional, schematic, three-dimensional representation;

4 the cylindrical roller bearing in 3 in a schematic, three-dimensional representation obliquely from above;

5 the cylindrical roller bearing in 3 respectively. 4 in a schematic sectional view in a sectional plane perpendicular to its axial extent.

The 1 shows in a sectional, schematic, three-dimensional representation of a tapered roller bearing 1 as a first embodiment of the invention, which is an outer ring 2 , an inner ring 3 (or only one shown) and a plurality between the outer ring 2 and inner ring 3 Rollably arranged frustoconical tapered rollers 4 (shown in part) in a pocket cage 5 being held.

The outer ring 2 is constructed in one piece and has at the circumferential inner surface in cross-section two mutually angularly arranged raceways 6 and 7 on which the tapered rollers 4 roll.

The inner ring 3 also has a tread 8th on top of which are the tapered rollers 4 roll it and this at an angle to the axis of rotation of the tapered roller bearing 1 to lead. In addition, the inner ring comprises a board on both sides 9 . 10 , which for lateral guidance of the tapered rollers 4 are formed.

The pocket cage 5 is designed in several parts and includes a pocket band ring 11 , which in the axial direction of the tapered roller bearing 1 is conical and also in the axial direction on both sides a radially encircling side edge portion 12 respectively 13 having. On the side edge sections 12 respectively 13 is each a cage side window 14 respectively 15 set that from the side edge sections 12 respectively. 13 be encompassed in the radial direction. Cage side windows 14 and 15 are with the pocket band ring 11 connected firmly and / or permanently with any type of connection.

As also from the 1 gives, is the central axis 16 the tapered rollers 4 arranged so that they are the cage side windows 14 respectively 15 in the radial direction centrally or approximately centrally intersects, this arrangement is not mandatory.

at a modified embodiment of the pocket band ring surrounded by the cage side windows.

The 2 shows the tapered roller bearing 1 in 1 in a radial plan view with removed outer ring 2 , wherein the same reference numbers represent the same parts as in FIG 1 describe.

From the 2 is once again evident that the tapered rollers 4 , of which only a single example is shown, on the tread 8th of the inner ring 3 roll. The tapered rollers 4 are sideways through the rims 9 respectively 10 guided. To ensure that the tapered rollers 4 are separated from each other and each have a same distance from each other einhal, has the pocket tape 11 regularly spaced apart and the side edge portions 12 and 13 connecting crossbars 17 on. Through the side edge sections 12 respectively 13 and the crossbars 17 be windows or bags 18 formed in which the tapered rollers 4 inside the pocket cage 5 be guided.

The pocket band 11 is designed as a stamped and bent part and corresponds in mechanical stiffness at best the rigidity of a sheet metal cage. To the pocket cage 5 to qualify for higher demands, are the cage side windows 14 respectively 15 with the pocket band 11 firmly connected, leaving the pocket cage 5 embodied as a rigid entity. The pocket cage 5 has the advantage of pocket tape 11 and cage side windows 14 respectively 15 can be interpreted independently of each claim in terms of both the dimensioning and in terms of the material. In particular, the parts can be dimensioned to different degrees and / or consist of different materials.

As is also best of 2 results, have the front sides of the tapered rollers 4 facing side surfaces of the cage side windows 14 respectively. 15 molded or additionally attached, in particular welded or screwed locking lugs 19 , Which in complementary trained locking clearances (not shown) of the tapered rollers 4 engage and the tapered rollers 4 prevent it from falling out after installation.

The pocket cage 5 can in the tapered roller bearing 1 already installed in preassembled state, in particular, no pollution-intensive manufacturing steps within the tapered roller bearing 1 be performed. That in the 1 respectively 2 shown tapered roller bearings 1 can optionally be designed as a large warehouse, which has an outer diameter of about 300 mm. The material of the tapered rollers 4 is a common bearing steel.

The 3 shows a schematic, three-dimensional representation of a cylindrical roller bearing 20 as a second embodiment of the invention, which is an outer ring 21 , an inner ring 22 , Cylindrical rollers 23 between the outer ring 21 and inner ring 22 are stored rollable, as well as a pocket cage 24 , which the cylindrical rollers 23 leads.

As is clear from the 3 results are in this embodiment, the cage side windows 25 respectively 26 opposite the pocket band 27 to the inner ring 22 arranged offset so that the pocket tape 27 the cage side windows 25 and 26 engages in the radial direction. The lateral guidance of the cylindrical rollers 23 takes place at the in the 3 shown cylindrical roller bearings 20 through shelves 28 respectively 29 on the outer ring 21 are formed. Generally speaking, in practice, it is also advantageous in other types of rolling bearing arrangements to arrange the cage side discs on the side of the pocket band which are remote from the ribs for guiding the rolling bodies.

The 4 shows the cylindrical roller bearing 20 in 3 in a schematic plan view radially from above, without the outer ring 21 , The cage side windows 25 respectively 26 have molded locking lugs 30 on, the analogous to the locking lugs 19 and as already for 2 explains the cylindrical rollers 23 hold captive. Similar to the pocket tape 11 in 2 has the pocket band 27 in 4 crossbars 31 on that together with page edge sections 32 and 33 of the bag band 27 Windows or bags 34 form, in which the cylindrical rollers 23 be guided. In contrast to the embodiment in the 2 are in the 4 the crossbars 31 and the side edge sections 32 and 33 off-center and in the radial direction on the outside to the central axis of the cylindrical rollers 23 arranged. To sufficiently guide the cylindrical rollers is the width of the pockets 34 formed in azimuthal extent less than the maximum diameter of the cylindrical rollers 23 ,

The 5 shows the cylindrical roller bearing 20 in a schematic section through a sectional plane perpendicular to the axial extent of the cylindrical roller bearing 20 , where it can be seen that the transverse webs 31 at the cylindrical rollers 23 facing side surfaces have a curvature which is adapted to the cylindrical rollers, so that the inner segment shape or side surface of the transverse webs 31 on the cylindrical rollers 23 lie flat or touching them. Depending on the configuration, it is also possible that the inner segment shape of the pockets 34 is realized so that a point or line-shaped contact area between cylindrical rollers 23 and crossbars 31 is formed. Also the cylindrical roller bearing 20 can be designed as a large warehouse, in particular with the same materials as the first embodiment.

By the arrangement of the shelves 9 . 10 respectively. 25 . 26 and the design of the pocket cage 5 respectively. 24 is it possible to use the pocket cage 5 outside the rings of rolling bearings 1 respectively. 20 as a preassembled unit - optionally with already mounted rolling elements - assemble and then only in the rings to use what a low-pollution and careful mounting of the bearings 1 respectively. 20 allowed.

1

Tapered roller bearings

2

outer ring

3

inner ring

4

tapered rollers

5

bag cage

6

career (Outer ring, left)

7

career (Outer ring, right)

8th

career (right inner ring)

9

inboard

10

outboard

11

pocket tape

12

(Inner) Side edge portion

13

(outer) Side edge portion

14

(inner) Cage side window

15

(outer) Cage side window

16

central axis

17

crosspiece

18

bag

19

locking lug

20

Cylindrical roller bearings

21

outer ring

22

inner ring

23

cylindrical roller

24

bag cage

25

(left) Cage side window

26

(right) Cage side window

27

pocket tape

28

(Left) shelf

29

(Right) shelf

30

locking lugs

31

crosspiece

32

(Right) Side edge portion

33

(Left) Side edge portion

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - AT 391744 B [0004]
• - DE 10031427 C2 [0005]

Claims (12)

Multi-part pocket cage ( 5 ; 24 ) for a roller bearing ( 1 ; 20 ) with a sheet metal cage ring ( 11 ; 27 ), in the pockets ( 18 ; 34 ) for receiving rolling elements ( 4 ; 23 ) and a part of the pocket cage ( 5 ; 24 ), and with at least one support ring ( 14 . 15 ; 25 . 26 ), which with the sheet metal cage ring ( 11 ; 27 ) is firmly connected to the stiffening and forms another part of the pocket cage. Pocket Cage ( 5 ; 24 ) according to claim 1, characterized in that the sheet metal cage ring ( 11 ; 27 ) from a pocket band ( 11 ; 27 ) and / or exists. Pocket Cage ( 5 ; 24 ) according to claim 1 or 2, characterized in that the sheet metal cage ring ( 11 ; 27 ) and / or the pocket band is designed as a stamped and bent part. Pocket Cage ( 5 ; 24 ) according to one of the preceding claims, characterized in that the at least one support ring ( 14 . 15 ; 25 . 26 ) is designed as a disc ring. Pocket Cage ( 5 ; 24 ) according to any one of the preceding claims, characterized in that the sheet metal cage ring ( 11 ; 27 ) on both sides of a side edge portion ( 12 . 13 ; 32 . 33 ), which in each case with one of the at least one support rings ( 14 . 15 ; 25 . 26 ) connected is. Pocket Cage ( 5 ; 24 ) according to one of the preceding claims, characterized in that the at least one support ring ( 14 . 15 ; 25 . 26 ) or the sheet metal cage ring ( 11 ; 27 ) Locking devices ( 19 ; 30 ), which for receiving rolling elements ( 4 ; 23 ) are formed. Rolling element bearings ( 1 ; 20 ), characterized by the multi-part pocket cage according to one of the preceding claims. Rolling element bearings ( 1 ; 20 ) according to claim 7, characterized by a plurality of rolling elements ( 4 ; 20 ), which are formed without drilling and / or rolling bearing steel. Rolling element bearings ( 1 ; 20 ) according to claim 7 or 8, characterized in that the or the support rings ( 14 . 15 ; 25 . 26 ) radially outwardly or radially inwardly to the sheet metal cage ring ( 11 ; 27 ) are arranged. Rolling element bearings ( 1 ; 20 ) according to one of claims 7 to 9, characterized in that the pocket cage ( 5 ; 24 ) is installed as a preassembled unit. Rolling element bearing ( 1 ; 20 ) according to one of claims 7 to 10, characterized by a design as a large warehouse. Rolling element bearings ( 1 ; 20 ) according to any one of claims 7 to 11, characterized by screw rims.