DE102008037075A1 - Ball roller bearings, in particular for receiving one-sided higher axial forces, and method for mounting such a ball roller bearing - Google Patents

Abstract

The invention relates to a ball roller bearing (1) and a method for its assembly, which ball roller bearing (1) consists essentially of an outer bearing ring (2) and an inner bearing ring (3) and a plurality between these bearing rings (2, 3) arranged ball rollers (4), each having two symmetrically flattened from a spherical base side surfaces (5, 6) and are held in the circumferential direction by a window cage (7) at regular intervals, whose cage pockets (8) each have the overall contour of one longitudinal and one transverse to Circumferentially arranged cross-sectional contour (9, 10) of a ball roller (4). In this case, the ball rollers (4) have a width (bK) of about 70% of the diameter (dK) of their ball base and roll with their running surfaces (11) in two in the outer bearing ring (2) and in the inner bearing ring (3) incorporated groove-shaped raceways (12, 13), which are delimited axially by two respective rims (14, 15, 16, 17) whose radial height is formed such that the radial distance (SR, SL) between the rims (14, 15 ) on the outer bearing ring (2) and the ribs (16, 17) on the inner bearing ring (3) is smaller than the width (bK) of the ball rollers (4). According to the invention provided for receiving the lower axial forces board (14 or 15) on the outer bearing ring (2) radially formed such a reduced height, that the inner diameter (DI) is greater than the outer diameter (DA) ...

Description

Field of the invention

The The invention relates to a ball roller bearing with the features of the preamble of claim 1 and a method for assembling such Ball roller bearing with the features of the preamble of the claim 9, and is particularly advantageous from one side with higher axial forces loaded ball roller bearings, such as on a fixed bearing for the input and output shaft of a motor vehicle gearbox trained ball roller bearings, can be used.

Background of the invention

From the date of the present patent application not yet published German patent application with the official file number 10 2008 016 977.3 is a ball roller bearing and a method for its assembly is known, which consists essentially of an outer bearing ring and an inner bearing ring and a plurality between these bearing rings arranged ball rollers, each having two symmetrically flattened from a spherical base shape, arranged parallel to each other side surfaces and in Circumferential direction are held by a window cage at regular intervals to each other, the individual cage pockets each have the integrated overall contour of a longitudinally and transversely to the circumferential direction arranged cross-sectional contour of a ball roller. The cross-sectional contour of the cage pockets arranged along the circumferential direction corresponds in this case to the shape of a sectional plane arranged above the transverse axis of a ball roller, while the cross-sectional contour of the cage pockets arranged transversely to the circumferential direction has the shape of a sectional plane arranged directly on the transverse axis of a ball roller.

In addition, the ball rollers between their side surfaces on a width of about 70% of the diameter of their ball base shape and roll with their running surfaces in two incorporated into the inside of the outer bearing ring and in the outer side of the inner bearing ring groove-shaped tracks, which axially by two shelves be limited. The radial height of these shelves is designed such that the radial distance between the rims on the outer bearing ring and the rims on the inner bearing ring is smaller than the width of the ball rollers, so that the ball rollers roll similar to the balls of deep groove ball bearings in very deep raceways , but not with the usual for ball roller bearings and for example by the DE 43 34 195 A1 known Axialmontageverfahren can be filled in the ball roller bearing.

to Assembly of such a ball roller bearing was therefore due to patent application, a method proposed in which the inner bearing ring and the bearing cage of the ball roller bearing initially in concentric position to each other on one be arranged at the common level and then the Ball rollers twisted by 90 ° to their operating position Position through the cage pockets of the bearing cage inserted into the raceway of the inner bearing ring become. Thereafter, a pivoting of the ball rollers within the cage pockets around their transverse axis by 90 ° in a lying position such that their side surfaces are arranged parallel to the longitudinal axis of the bearing, and the Insertion of the inner bearing ring together with the bearing cage and the ball rollers in a 90 ° to the outer Bearing ring twisted position in the outer bearing ring. Then they will be on the one hand and on the other hand the outer bearing ring arranged ball rollers within the raceway of the inner race each opposite to one of the side surfaces of the inner bearing ring in a tilted inclined position tilted and the inner bearing ring along with the bearing cage and the ball rollers, ahead with the side surfaces of the inner bearing ring, to which the ball rollers are employed to their common bearing transverse axis pivoted in the outer bearing ring. The first Part of the inner bearing ring, the bearing cage and The ball roller existing assembly is then first making a small radial offset to the outside Bearing ring swung into the outer bearing ring while the remaining part of the assembly with subsequent lowering the already pivoted part of the inner bearing ring in the outer Bearing ring is pivoted. Finally, the outer Bearing ring in a rotational movement with a speed offset at the ball rollers automatically by self-rotation and by centrifugal force in their operating position within the raceways erect the bearing rings and finally the cage rims of the bearing cage in the direction of the side surfaces the ball rolls flanged to a guide to Avoiding a transverse tumbling of the ball rollers produce.

Object of the invention

There the known from the prior art ball roller bearing for receiving equally high forces is designed from both axial sides, However, the bearings in transmission applications mostly from an axial side are loaded higher than from the other axial side, is The invention thus the object of the known ball roller bearings As well as its mounting method to improve that it suitable for receiving one-sided higher axial forces and thereby easier and cheaper to manufacture and assemble is.

Description of the invention

According to the invention This task on the one hand in a ball roller bearing with the features of Preamble of claim 1 solved by the in the bearing application for absorbing the lower axial forces provided board on the outer bearing ring radially so is formed reduced in height, that the inner diameter larger than the outer diameter of a from the inner bearing ring, the window cage and the ball rollers existing pre-assembled unit is.

Of the The invention is therefore based on the knowledge that at least the to accommodate the lower axial forces provided board on the outer bearing ring without function restrictions of the ball roller bearing in gear applications with a lower Height can be formed to allow the manufacturing and lower material costs for such a ball roller bearing to be able to. At the same time the enlarged one carries Inner diameter of the reduced-height Bordes on the outer Bearing ring in that the assembly of such a ball roller bearing relative to the ball roller bearing described in the prior art considerably simpler and therefore more cost-effective can be designed.

preferred Embodiments and advantageous developments of the invention Ball roller bearing are described in the subclaims.

After that It is according to claims 2 and 3 at provided the ball roller bearing according to the invention, that the depth of the raceway in the outer race compared to the reduced-height board about 14% and their depth compared to the not reduced height Board about 21% of the diameter of the ball basic shape of the ball rollers while the depth of the track is inside Bearing ring opposite the two this career limiting Borden about 27% of the diameter of the ball basic shape of the ball rollers is. The formation of the raceways in the bearing rings with such dimensions corresponds approximately to the conventional Deep groove ball bearings proven experience and ensures that the ball rollers also depends on the radial bearing air with a permissible misalignment of the bearing from 8 to 16 angular minutes from the middle layer a high Schmiegungsgrad have to their careers and the bearing thus the full load capacity reserves.

To to claims 4 and 5, the inventively designed Ball roller bearing in addition still characterized by that the distance between the reduced-height board on the outer bearing ring and the opposite board on the inner bearing ring about 59% of the diameter of the ball basic shape of the ball rollers, while the distance between the not reduced height board on the outer bearing ring and the radially opposite Board on the inner bearing ring only about 52% of the diameter of the ball basic shape the ball rollers is. Because the ball rollers between their side surfaces a distance of 70% of the diameter of the ball basic shape of the ball rollers Thus, it is also not possible, this from the axial side with the greater distance between the shelves axially insert into the camp. However, ensure the enough distances through the said distances the ball rollers and their high rims that the ball rollers a the radial load capacity of the bearing increasing large Have contact surface with their careers and that the Ball roller bearing an at least one side very high axial load capacity having.

One Another feature of the invention designed Ball roller bearing is it according to claim 6, that the window cage initially has a U-shaped profile cross-section, its lateral profile legs as cage rims to avoid a transverse staggering of the ball rollers are provided. Show the cage shelf preferably has such a length, that their end edges after a bearing assembly final Flaring to the ball rollers out at about height However, the pitch circle of the ball roller bearing are not arranged with the ball rollers in contact. The thus through the cage rims formed axial guidance of the ball rollers has become Therefore proved to be advantageous because the ball rollers at higher Speeds and even load due to the Although entering gyroscope effect without Schränkbewegungen run stably in their tracks and no axial guidance through a bearing cage, but during warehouse startup or at a bearing speed below a permissible minimum speed or with jerky high acceleration, especially in the load-free Zone of the camp have a so-called tumbling effect, in which The ball rollers tend to be in their tracks transverse to the direction unroll wavy. At the same time allows such Training the Käfigborde an automatic pressure angle adjustment ball rolling within their tracks of up to 25 ° the higher loaded axial side of the ball roller bearing out.

As an advantageous embodiment of the present invention designed ball roller bearing, it is also proposed by claim 7 that the window cage is made without cutting from a sheet metal strip, to which initially the Käfigborde be profiled by forming. The individual cage pockets are then incorporated by punching in the formed sheet metal strip and then the cutting of the sheet metal strip into individual sheet metal strips with the length of the Circumference of the bearing cage. Thereafter, the individual metal strips are rolled into a ring and finally their two ring ends welded together. Such a method of manufacture is known, for example, from the production of needle sleeves and has proved to be particularly suitable for the production of the bearing cage of the ball roller bearing according to the invention due to the low production costs.

Finally, according to the invention, the ball roller bearing designed according to the invention is characterized by the fact that the sum of the distances of the filled ball rollers on their pitch circle is smaller than the diameter of the ball basic shape of a single ball roller and that it has a rolling body filling degree of about 85% to 95% in the mounted state. having. Using the example of a deep groove ball bearing DIN / ISO 6207 which can be filled with a maximum of 9 bearing balls and thus has a degree of filling of about 60%, this means that an identically constructed according to the invention ball roller bearing can be filled with 14 ball rollers. As a result, its carrying capacity increases to about 1.4 times a structurally identical deep groove ball bearing, so that its life, starting from a life of 100% for the identical deep groove ball bearing, about 180% to 240%. Another advantage of the ball roller bearing according to the invention is therefore that, despite a smaller than the width of the ball rollers trained distance between the bearing rings has a degree that was previously achievable only with mounted in Axialmontageverfahren ball roller bearings, where the ball rollers are much narrower and on Roll significantly flatter raceways and where the distance between the bearing rings is greater than the width of the ball rollers.

The On the other hand, however, the object of the invention is also achieved by a method for mounting a the features of claim 1 having ball roller bearing according to claim 9, wherein in a conventional manner in a first step, the inner bearing ring and the window cage of the ball roller bearing in concentric Position to each other on an at least approximately common plane in a second step, the insertion the ball rollers in a 90 ° to their operating position twisted position through the cage pockets of the window cage through takes place in the raceway of the inner bearing ring, in one third step the ball rollers inside the cage pockets around its transverse axis by 90 ° in a lying position such be pivoted, that their side surfaces parallel to Longitudinal bearing are arranged in a fourth step the insertion of the inner bearing ring together with the window cage and the ball rollers in the outer bearing ring, in a fifth step, the outer bearing ring is placed in a rotational movement at a speed at which the Ball rolling by self-rotation and by centrifugal force itself in their operating position within the raceways of the bearing rings straighten up and in a sixth step a flanging the cage shelf of the window cage towards the Side surfaces of the ball rollers and an optional greasing and / or Sealing the ball roller bearing takes place.

in the Difference to the known from the prior art Montageverfah ren the assembly method according to the invention is characterized However, characterized in that the insertion of the inner bearing ring together with the window cage and the ball rollers in the outer Bearing ring in the fourth step no longer by swinging but axially straight from the formed with the reduced-height board Side of the outer bearing ring ago by the reduced height Board passes through. Since the ball rollers in the third step inside the cage pockets of the window cage around whose transverse axis pivoted by 90 ° in a horizontal position and from the inner bearing ring, the window cage and the ball rollers existing preassembled unit thereby smaller outer diameter than the inner diameter of the height reduced Bordes, it is thus possible the unit in a simple manner collision-free by the height-reduced Axially straight on the outer bearing ring to introduce in these. This shortens the bearing assembly compared to the known assembly method by several process steps and makes the assembly method according to the invention thus extremely cost-effective.

About that In addition, the assembly method according to the invention is characterized according to claim 10 also characterized by the fact that in the second process step the insertion of the ball rollers in a 90 ° twisted Position in the raceway of the inner bearing ring exclusively by the cross-sectional contour arranged transversely to the circumferential direction the cage pockets, which are only for this purpose in the bearing cage is incorporated.

As well it is according to claim 11 another feature of the inventive method that in the third Process step, the transverse axis about which pivots the ball rollers be below the level of the bottom of the bearing cage arranged so that the outwardly facing side surfaces then lying and now also along the circumferential direction arranged cross-sectional contour of the cage pockets filling Ball rollers in for the further process advantageous Way only slightly above the top of the bearing cage are arranged.

Finally, according to claim 12, it is still a last feature of the assembly according to the invention geverfahren that the ball rollers in the displacement of the outer bearing ring in a rotational movement with the edge regions of their treads are in contact with the edge regions of the raceways of their bearing rings and thus accelerated by frictional contact with the outer bearing ring. The completion of the generated Aufrichteffektes the ball rollers is easily noticeable by the incoming smooth running of the ball roller bearing.

Brief description of the drawings

A preferred embodiment of the invention formed Ball roller bearing and the invention Method for mounting such a ball roller bearing are below Referring to the accompanying drawings in more detail explained. Showing:

1 a three-dimensional view of a plan view of an inventively designed ball roller bearing;

2 a three-dimensional cross section through the inventively designed ball roller bearing according to 1 ;

3 an enlarged view of the upper half of the cross section through the ball roller bearing according to the invention according to 2 ;

4 a three-dimensional view and a sectional view through the ball roller bearing according to the invention after the first process step for its assembly;

5 a three-dimensional view and a sectional view through the ball roller bearing according to the invention after the second process step for its assembly;

6 a three-dimensional view and a sectional view through the ball roller bearing according to the invention after the third process step for its assembly;

7 a three-dimensional view and a sectional view through the ball roller bearing according to the invention during the fourth method step for its assembly;

8th a three-dimensional view and a sectional view through the ball roller bearing according to the invention after the fourth and before the fifth method step for its assembly;

9 a three-dimensional view and a sectional view through the ball roller bearing according to the invention after the fifth method step for its assembly;

10 a three-dimensional view and a sectional view through the ball roller bearing according to the invention after the sixth and last method step for its assembly.

Detailed description the drawings

The representations in the 1 and 2 show different views of a ball roller bearing 1 which essentially consists of an outer bearing ring 2 and an inner bearing ring 3 and a variety between these bearing rings 2 . 3 in a row arranged ball rollers 4 consists, in each case two symmetrically flattened from a basic spherical shape, mutually parallel side surfaces 5 . 6 and through a window cage 7 be held in the circumferential direction at regular intervals to each other. From the 3 and 4 it shows, the individual cage pockets 8th this window cage 7 in each case the integrated overall contour of a longitudinally and transversely to the circumferential direction arranged cross-sectional contour 9 . 10 a ball roller 4 have, wherein the longitudinal direction to the circumferential direction arranged cross-sectional contour 9 the cage pockets 8th the shape of one above the transverse axis A _KQ a ball roller 4 arranged sectional plane corresponds, while the transversely to the circumferential direction arranged cross-sectional contour 10 the cage pockets 8th the shape of a ball roll directly on the transverse axis A _KQ 4 has been attached cutting plane. In addition, through 3 clearly that the ball rollers 4 between their side surfaces 5 . 6 a width b _K of about 70% of the diameter d _{K have} their ball basic shape and with their treads 8th in two in the inside 9 of the outer bearing ring 2 and in the outside 10 of the inner bearing ring 3 incorporated groove-shaped raceways 11 . 12 roll off, which axially by two shelves 14 . 15 and 16 . 17 be limited, the radial height is formed such that the radial distance S _R , S _L between the rims 14 . 15 on the outer bearing ring 2 and the Borden 16 . 17 on the inner bearing ring 3 smaller than the width b _{K of} the ball rollers 4 is.

Furthermore, in 3 recognizable that the main innovation of the illustrated ball roller bearing 1 This is the board provided here by way of example to accommodate the lower axial forces 14 on the outer bearing ring 2 form radially reduced in height such that its inner diameter D _I greater than the outer diameter D _A one of the inner bearing ring 3 , the window cage 7 and the dashed spherical rollers shown 4 existing preassembled unit is to function without restrictions of the ball roller bearing 1 the assembly of such a ball roller bearing 1 to simplify considerably and thus to make it cheaper.

At the same time a high Schmiegungsgrades the ball rollers 4 to their careers 12 . 13 To realize, the depth is Rt _{A1 of} the track 12 in the outer bearing ring 2 , as in 3 indicated by dimension arrows, compared to the reduced-height board 14 about 14% and their depth Rt _A2 compared to the not reduced height board 15 about 21% of the diameter d _K of the ball basic shape of the ball rollers 4 , Likewise is in 3 indicated by dimension arrows that the depth Rt _{I of} the raceway 13 in the inner bearing ring 3 opposite the two this career 13 delimiting Borden 16 . 17 about 27% of the diameter d _K of the ball basic shape of the ball rollers 4 is and thus corresponds to the formation of the raceways on conventional deep groove ball bearings.

As 3 shows further, results from the different levels of execution of the shelves 14 . 15 on the outer bearing ring 2 in that the distance S _L between the reduced-height board 14 on the outer bearing ring 2 and the opposite board 16 on the inner bearing ring 3 about 59% of the diameter d _K of the ball basic shape of the ball rollers 4 is while the distance S _R between the not reduced height board 15 on the outer bearing ring 2 and the radially opposite board 17 on the inner bearing ring 3 about 52% of the diameter d _K of the ball basic shape of the ball rollers 4 is. Since the ball rolls 4 between their side surfaces 5 . 6 Although they are formed with a distance of 70% of the diameter d _{K of} their ball base, they thus have indeed large contact surface to their raceways, but it is not possible, this from the axial side with the greater distance S _L forth between the rims 14 , 16 axially into the ball roller bearing 1 introduce.

Finally, go out 4 also clear that the window cage 7 first, as shown, has a U-shaped profile cross-section, the lateral profile legs as cage rims 18 . 19 to avoid a staggering of the ball rollers 4 are provided. These cage rims 18 . 19 have such a length that they after a bearing assembly final crimping to the ball rollers 4 towards the in 3 have pictured shape and the end edges approximately at the level of the pitch circle of the ball roller bearing 1 are arranged. The starting material for such a window cage 7 is a sheet metal strip from which by profiling the cage rims 18 . 19 , Punching the cage pockets 8th , Cutting to the circumferential size of the window cage 7 as well as curling into a ring and welding the ring ends of the window cage 7 is produced without cutting. The with their special shape spaced apart cage pockets 8th of the camp cage 7 make it possible that the sum of the distances of the filled ball rollers 4 on whose pitch circle smaller than the diameter d _{K of} the ball basic shape of a single ball roller 4 is and the mounted ball roller bearing 1 , compared to identical deep groove ball bearings or other known ball roller bearings, a Wälzkörperfüllgrad of about 85% to 95%, so that its radial load capacity is many times higher and its life, starting from a life of 100% for a structurally identical deep groove ball bearings, about 180% up to 240%.

In the 4 to 10 hereinafter are also the individual steps of the method for mounting the inventively embodied ball roller bearing 1 shown. After this procedure, the bearing assembly begins in a first, in 4 illustrated assembly step first so that the inner bearing ring 3 and the window cage 7 of the ball roller bearing 1 be arranged on an at least approximately common plane in concentric position to each other.

In the in 5 shown second assembly step is then the insertion of the ball rollers 4 in a rotated by 90 ° to its operating position position by the cage pockets 8th of the bearing cage 7 into the raceway 13 of the inner bearing ring 3 , wherein this insertion of the ball rollers 4 clearly visible only by the transversely to the circumferential direction arranged cross-sectional contour 10 the cage pockets 8th he follows.

Then the ball rollers 4 in a third, through 6 clarified assembly step inside the cage pockets 8th pivoted about their transverse axes A _KQ by 90 ° in a horizontal position such that their side surfaces 5 . 6 are arranged parallel to the bearing axis A _LL or one of their side surfaces 5 or 6 directly in the raceway 13 of the inner bearing ring 3 lies, wherein the transverse axes A _{KQ of} the ball rollers 4 clearly visible in each case below the plane of the underside of the bearing cage 7 are arranged.

After pivoting the ball rollers 4 in its lying position then takes place as the fourth, in 7 pictured assembly step the insertion of the through the inner bearing ring 3 , the window cage 7 and the ball rolls 4 formed unit in the outer bearing ring 2 , The onset of this unit is carried out according to the invention of the with the reduced-height board 14 trained axial side of the outer bearing ring 2 forth according to the movement arrows inserted in the drawing axially straight through the reduced height board 14 through, leaving the ball roller bearing 1 after this process step is first completed and the in 8th having shown shape.

In 9 is then indicated by a further movement arrow that the outer bearing ring 2 of the ball roller bearing 1 then in a fifth month Tagged step in a rotational movement or at such a speed n is accelerated that the ball rollers 4 by self-rotation and by centrifugal force automatically into their operating position within the raceways 12 . 13 the bearing rings 2 . 3 raise. This is possible because the ball rollers 4 , as in 8th can be seen before moving the outer bearing ring 2 in a rotational movement with the edge regions of their treads 11 in contact with the edge regions of the raceways 12 . 13 their bearing rings 2 . 3 stand and thus by frictional contact with the outer bearing ring 2 to be accelerated with.

As a final sixth assembly step then takes place in 10 indicated beading of the cage rims 18 . 19 of the window cage 7 in the direction of the side surfaces 5 . 6 the ball rollers 4 so as to provide axial guidance of the ball rollers 4 to produce in order to avoid the described Quertaumeleffektes in certain operating conditions.

1

Ball Roller Bearings

2

outer bearing ring

3

internal bearing ring

4

ball rolling

5

Side surface of 4

6

Side surface of 4

7

window cage

8th

cage pockets

9

Cross-sectional contour of 8th

10

Cross-sectional contour of 8th

11

Treads of 4

12

Career in 2

13

Career in 3

14

Board of 12

15

Board of 12

16

Board of 13

17

Board of 13

18

Cage board on 7

19

Cage board on 7

b _K

Width of 4

d _K

diameter of 4

S _R

distance between 15 and 17

S _L

distance between 14 and 16

D _I

Inside diameter of 14

D _A

Outside diameter of 3 + 4 + 7

Rt _A1

Depth of 12

Rt _A2

Depth of 12

Rt _I

Depth of 13

A _KQ

Transverse axis of 4

A _LL

bearing longitudinal axis

n

rotation speed

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

• - DE 102008016977 [0002]
• - DE 4334195 A1 [0003]

Cited non-patent literature

• - DIN / ISO 6207 [0013]

Claims (12)

Ball roller bearings ( 1 ), in particular for receiving one-sided higher axial forces, essentially consisting of an outer bearing ring ( 2 ) and an inner bearing ring ( 3 ) and a plurality between these bearing rings ( 2 . 3 ) arranged ball rollers ( 4 ), each of two symmetrically flattened by a spherical base shape, parallel to each other side surfaces ( 5 . 6 ) and in the circumferential direction through a window cage ( 7 ) are held at regular intervals, whose individual cage pockets ( 8th ) in each case the integrated overall contour of a longitudinally and transversely to the circumferential direction arranged cross-sectional contour ( 9 . 10 ) a ball roller ( 4 ), wherein the ball rollers ( 4 ) between their side surfaces ( 5 . 6 ) have a width (b _K ) of about 70% of the diameter (d _K ) of their ball basic shape and with their running surfaces ( 11 ) in two into the inside of the outer race ( 2 ) and into the outside of the inner race ( 3 ) incorporated groove-shaped raceways ( 12 . 13 ), which axially by two shelves ( 14 . 15 . 16 . 17 ) whose radial height is formed such that the radial distance (S _R , S _L ) between the ribs ( 14 . 15 ) on the outer bearing ring ( 2 ) and the Borden ( 16 . 17 ) on the inner bearing ring ( 3 ) smaller than the width (b _K ) of the ball rollers ( 4 ), characterized in that in the bearing application for receiving the lower axial forces provided board ( 14 or 15 ) on the outer bearing ring ( 2 ) is formed radially reduced in height such that its inner diameter (D _I ) is greater than the outer diameter (D _A ) of the inner bearing ring ( 3 ), the window cage ( 7 ) and the ball rollers ( 4 ) existing pre-assembled unit is. Ball roller bearing according to claim 1, characterized in that the depth (Rt _A1 ) of the track ( 12 ) in the outer bearing ring ( 2 ) compared to the reduced-height board ( 14 ) about 14% and their depth (Rt _A2 ) compared to the non-height reduced board ( 15 ) about 21% of the diameter (d _K ) of the ball basic shape of the ball rollers ( 4 ) is. Ball roller bearing according to claim 2, characterized in that the depth (Rt _I ) of the track ( 13 ) in the inner bearing ring ( 3 ) compared to the two this career ( 13 ) delimiting Borden ( 16 . 17 ) about 27% of the diameter (d _K ) of the ball basic shape of the ball rollers ( 4 ) is. Ball roller bearing according to claim 3, characterized in that the distance (S _L ) between the reduced-height board ( 14 ) on the outer bearing ring ( 2 ) and the opposite board ( 16 ) on the inner bearing ring ( 3 ) about 59% of the diameter (d _K ) of the ball basic shape of the ball rollers ( 4 ) is. Ball roller bearing according to claim 4, characterized in that the distance (S _R ) between the not reduced height board ( 15 ) on the outer bearing ring ( 2 ) and the radially opposite board ( 17 ) on the inner bearing ring ( 3 ) about 52% of the diameter (d _K ) of the ball basic shape of the ball rollers ( 4 ) is. Ball roller bearing according to claim 1, characterized in that the window cage ( 7 ) initially has a U-shaped profile cross-section, the lateral profile legs as cage rims ( 18 . 19 ) in order to avoid the balls ( 4 ) are provided. Ball roller bearing according to claim 7, characterized in that the window cage ( 7 ) from a sheet metal strip by profiling the cage rims ( 18 . 19 ), Punching the cage pockets ( 8th ), Cutting to scale, rolling into a ring and welding the ring ends is made. Ball roller bearing according to claim 1, characterized in that the sum of the distances of the filled ball rollers ( 4 ) on whose pitch circle smaller than the diameter (d _K ) of the ball basic shape of a single ball roller ( 4 ) and the mounted ball roller bearing ( 1 ) has a Wälzkörperfüllgrad of about 85% to 95%. Method for mounting a ball roller bearing with the features of claim 1, wherein in a first step, the inner bearing ring ( 3 ) and the window cage ( 7 ) of the ball roller bearing ( 1 ) are arranged in concentric position to each other on an at least approximately common plane, in a second step, the insertion of the ball rollers ( 4 ) in a rotated by 90 ° to its operating position position by the cage pockets ( 8th ) of the window cage ( 7 ) into the raceway ( 13 ) of the inner bearing ring ( 3 ), in a third step the ball rollers ( 4 ) within the cage pockets ( 8th ) are pivoted about their transverse axis (A _KQ ) by 90 ° in a lying position such that their side surfaces ( 5 . 6 ) are arranged parallel to the bearing longitudinal axis (A _LL ), in a fourth step, the insertion of the inner bearing ring ( 3 ) together with the window cage ( 7 ) and the ball rollers ( 4 ) in the outer bearing ring ( 2 ), in a fifth step the outer bearing ring ( 2 ) is set in a rotational movement at a rotational speed (n) at which the ball rollers ( 4 ) by self-rotation and by centrifugal force automatically in their operating position within the raceways ( 12 . 13 ) of the bearing rings ( 2 . 3 ) and, in a sixth step, crimping the cage rims ( 16 . 17 ) of the window cage ( 7 ) in the direction of the side surfaces ( 5 . 6 ) of the ball rollers ( 4 ) as well as an optional greasing and / or sealing of the ball roller bearing ( 1 ), characterized in that the insertion of the inner bearing ring ( 3 ) along with the window cage ( 7 ) and the ball rollers ( 4 ) in the outer bearing ring ( 2 ) in the fourth step of the with the height reduced board ( 14 or 15 ) formed side of the outer bearing ring ( 2 ) axially straight through the reduced-height board ( 14 or 15 ) through. Method according to claim 9, characterized in that the insertion of the ball rollers ( 4 ) in a 90 ° twisted position into the track ( 12 ) of the inner bearing ring ( 3 ) by the transversely to the circumferential direction arranged cross-sectional contour ( 10 ) of the cage pockets ( 8th ) of the window cage ( 7 ) he follows. A method according to claim 9, characterized in that during the pivoting of the ball rollers ( 4 ) within the cage pockets ( 8th ) of the window cage ( 7 ) in a lying position whose transverse axis (A _KQ ) below the level of the underside of the window cage ( 7 ) is arranged. Method according to claim 9, characterized in that the ball rollers ( 4 ) when moving the outer bearing ring ( 2 ) in a rotational movement with the edge regions of their treads ( 11 ) in contact with the edge regions of the raceways ( 12 . 13 ) of their bearing rings ( 2 . 3 ) stand.