DE102011088642A1 - Large-sized deep grooved ball bearing cage for use in e.g. industrial sector, has ball pocket segments combined to form annular body, where geometry of bars is coordinated so that body comprises segments, which are identical on sides - Google Patents

Abstract

The cage has multiple ball pockets provided in a circumferential direction and formed by ball pocket segments (S1, S2), which are made as a sheet metal forming part. The ball pocket segments comprises two connection bars (1, 2), and a laterally bulging pocket mantle section (3) that is provided between the connection bars. The ball pocket segments are combined to form an annular body by overlapping of the connection bars. Geometry of the connection bars of the ball pocket segments is coordinated such that the annular body comprises the ball pocket segments, which are identical on two sides.

Description

Field of the invention

The invention relates to a ball bearing cage, which forms as such in the circumferential direction sequential ball guide pockets, which are received in the installed state, the balls of a deep groove ball bearing and thereby guided in the grooves of a bearing inner ring and a bearing outer ring. Furthermore, the invention also relates to a deep groove ball bearing, which is equipped with such a ball bearing cage through which the balls are guided and thereby kept in the circumferential direction at a distance.

Background of the invention

Out DE 39 39 438 A1 a ball bearing cage for a deep groove ball bearing is known, which is composed of two ring elements. The ring elements are designed so that the ball guide pockets formed therein have a non-circular contour in a plan view of a ball guide pocket.

Out JP2007-292195 A is a likewise composed of two ring elements two-piece ball bearing cage for a deep groove ball bearing, in which the ball guide pockets have a hexagonal contour in a plan view of a ball guide pocket. The two ring elements have a rectangular cross section in the area of the ball guide pockets.

Out US 3,820,867 A a ball bearing cage is known which comprises a plurality of mutually riveted ball pocket members, said ball pocket members are each composed of two mutually with respect to a bearing center plane of symmetrical pocket segments. Each ball pocket member forms a first terminal plate pair with immediately adjacent terminal plate sections and a second terminal plate pair forms a receiving space. In this receiving space is then a "first" connection plate pair with adjacent terminal plate portions of the subsequent ball pocket member can be used.

Object of the invention

The invention has for its object to provide a ball bearing cage for a deep groove ball bearing, which is inexpensive to produce and is characterized by an advantageous mechanical performance.

Description of the invention

This object is achieved by a ball bearing cage having a plurality of circumferentially successive ball pockets, which are formed by ball pocket segments, which are each manufactured as Blechumformteile, each ball pocket segment having a first and a second connecting web and between these two connecting webs at least one laterally buckling pocket wall portion is provided and wherein the ball bag segments are combined via the connecting webs to form a ring body, and the geometry of the connecting webs of the ball bag segments is adjusted so that both sides of the ring body composed of identical ball bag segments, d. H. on both sides of the ring body, the same ball bag segments are installed.

This advantageously makes it possible to assemble a robust ball-bearing cage of a single type of identically constructed ball-pocket segments which, as such, can be separated out of a plate material and processed by deformation technology. Furthermore, it is possible in an advantageous manner, even in large bearing dimensions in relation to a complete cage much handier ball bag segments of a heat or otherwise microstructure treatment, and to subject a coating process.

The assembly of the ball pocket segments is preferably carried out such that the connecting webs of the adjacent ball pocket members are assembled alternately layered such that there is only one connecting web of the subsequent ball pocket member between two connecting webs of a ball pocket member.

The inventive concept can be implemented so that as a side effect a tolerance compensation is achieved by which the inner dimensions of the ball guide pocket can be met with close tolerances.

The invention is based essentially on the execution of a ball cage made of sheet steel for deep groove ball bearings. The invention is particularly suitable for relatively large-sized deep groove ball bearings in the industrial and energy sectors. The inventive concept makes it possible to use sheet metal cages even with large bearing dimensions whose components can be manufactured with moderate forming forces. The material waste can be significantly reduced by the inventive concept compared to cages made of ring elements. The cages of the invention have one opposite Brass massive cages significantly lower weight on.

According to the invention, a sheet metal cage is manufactured from individual cage segments. The individual segments are lined up overlapping each other and connected to each other by riveting. The cage segments according to the invention can be produced advantageously because of their smaller size. The material waste can be reduced to a minimum. Material costs are reduced enormously compared to the brass cage. Cage segments with a ball pocket will always use the same segment twice the number of balls. Such a segmented cage can be produced particularly economically in large storage compared to alternative designs. In the case of two-section cage segments, structurally identical segments are used corresponding to the number of balls. However, this variant requires even numbers of balls.

According to a particularly preferred embodiment of the invention, the first connecting web and the second connecting web each form an upper and a lower seat surface wherein the first connecting web and the second connecting web of a ball pocket segment are laterally offset from one another such that the lower seat surface of the first connecting web with the upper seat surface of second connection bar is aligned. By this measure, it becomes possible, the entire ball bearing cage of a single variety, d. H. to form of identical spherical bag segments.

The ball pocket segments are preferably coupled in the region of the connecting webs by a connecting means which passes through the connecting webs. This connecting means may be designed in particular as a screw or rivet. Preferably, a clamping force is applied by this connecting means which clamps the connecting webs on their common contact surfaces together. These contact surfaces can be treated in terms of surface technology such that they have a high surface roughness. Furthermore, it is also possible to accomplish the connection of the connecting-piece packing by two connecting means spaced apart from one another.

By the inventive concept, it is also possible to pre-assemble the cage segments of a cage side and z. B. together by simple welds, or possibly to connect something more resilient. On the thus formed, already form-retaining ring element can then be placed after inserting the balls, or after placing on the balls located in the camp, a second from pre-stapled ring segments composite ring element. Alternatively, individual segments can be placed on the form-bearing ring element from the other bearing side. The concept according to the invention thus makes it possible to locally open the bearing for maintenance or inspection purposes on the cage without the balls moving in the circumferential direction.

According to a particular aspect of the present invention, it is possible to design the ball bag segments so that the ball guide pockets formed thereby are formed in a polygonal plan view. The ball guide pockets can continue to be designed so that the respective ball encompassing ball pocket segment varies in the course of the respective ball in terms of its cross-section so that in this case the respective ball pocket segment has cross-sections, the inside of the pockets facing inner edges describe a different depth concave contour.

This advantageously makes it possible to provide a ball bearing cage in which the balls accommodated in the ball guide pockets can be supported in the circumferential direction over the ball bearing cage with close play and in the two side areas of the ball bearing cage between the balls and the cage inner wall larger running lubricant storage zones are formed ,

The invention is based essentially on the design of a made of sheet steel from peripheral segments composite ball cage for deep groove ball bearings. The special design of the ball guide pockets, it is possible to reduce the operating noise intensity. By cage design according to the invention, it is possible to support the balls with little play in the direction of rotation. As a result, the speed differences of the ball can be reduced without the balls are clamped here.

In the bag shapes according to the invention, the ball can be tightly guided and still remain enough space for grease or oil. In the cage design according to the invention, the lubrication in the pocket is reliably maintained by the lubricant "transported" by the ball into the cage pocket. The retracted in the narrow gap between the ball and cage pocket lubricant is claimed compared to conventional cage designs to a much lesser extent to shear. As a result, both the lubricant aging, and the friction and heat accumulation are reduced.

The cage pocket can be given a shape by which the play of the ball in pocket (freedom in the direction of circulation) are significantly reduced can. The lubrication of the ball in the cage pocket is still improved.

In the design of the cage pocket invention, the holder of the ball is no longer in a purely annular, kallottenartigen pocket, but in a particular hexagonal pocket geometry. In the plane of the ball holder, the pocket is designed such that adjusts a two-zone guide in a spherical segment. The guide planes are preferably at a relatively small angle to the direction of rotation (about 15 ° -20 °). Thus, the cage is also pushed by the balls easier. In this level, the game of ball in the pocket is set in the direction of rotation and can thus be reduced to a minimum.

By essentially plan running contact surfaces between balls and cage contact is reduced to a minimum (point contact) and a significant reduction in the friction between the ball and cage pocket is achieved. The cage pocket creates additional space. These can be used as a deposit surface for the lubricant (grease depot). Since the gap between the ball and the pocket geometry is significantly larger, there is also less oil or grease shear friction. The cage pocket resembles a hexagon in plan view. This creates free space next to the ball inside the bag.

According to a particularly preferred embodiment of the invention, the ball pocket segment are designed such that the respective pocket wall portion has cross-sections, the inside of the pocket facing inner edges describe a different deep concave contour. This concave contour may comprise mutually employed substantially rectilinear portions which are interconnected via a rounded transition zone. Preferably, the areas of pronounced concavity are designed so that the ball contacts these zones by two-point contact, and in this case a small gap remains between those two contact points between the ball and pocket inner wall, for example, has a crescent-shaped cross-section.

The inner wall of the ball guide pockets preferably forms wall zones with pronounced concavity and wall zones without, or with a small concavity. Over the wall zones with pronounced concavity is preferably the support in the circumferential direction. The zones without or with low concavity form those guide surfaces which guide the ball bearing cage laterally on the balls.

By way of the non-circular design of the ball guide pockets, in particular in the formation of those ball guide pockets as a hexagonal structure, it is possible to form a pair of opposing, substantially planar side guide flanks on each ball guide pocket. These side guide flanks can be provided with a central bore which allows a lubricant passage.

The preferably none, or at most low concavity having side guide flanks are connected via so-called. Transverse edges or legs to the connecting sections. This connection preferably takes place over radius areas. The basic orientation of neighboring, d. H. On a common junction of tapered transverse edges is preferably chosen so that two adjacent transverse flanks are employed at an obtuse angle to each other. Those aligned with each other oriented transverse edge preferably form a ball concave groove cross section which forms an outer and an inner ball contact zone. The channel cross-section is designed such that when the ball abuts against the ball contact zones between the channel bottom and the ball a sickle-shaped inner gap remains. The connecting sections d. H. the side edges of the ball guide pockets are preferably formed as flat surfaces and thus have no concavity.

Brief description of the drawings

Further details and features of the invention will become apparent from the following description taken in conjunction with the drawings. Showing:

1 a detailed perspective view of a inventively formed of alternately layered composite ball bag segments ball bearing cage;

2 a perspective view for illustrating further geometric details of a ball pocket segment of a ball bearing cage after 1 ;

3 a perspective view of a ball bearing cage according to the invention with inserted balls;

4 a sectional view for illustrating the particular contact and guide surface geometry in a ball bearing cage according to the invention;

5 an axial sectional view of a ball bearing which is equipped with a ball bearing cage according to the invention;

6 a side view of the ball bearing 5 ;

7 a perspective view of a ball bearing cage according to the invention, as such from identical double-pocket segments after 8th is composed, here with inserted balls;

8th a perspective view of a ball pocket segment of the cage according to the invention 7 which as such forms two lateral bulges to form bullet pockets;

nine a side view of the ball bearing 7 to illustrate the segmental stratification, each with a continuous bridge section.

Detailed description of the drawings

1 shows a ball bearing cage according to the invention. This consists of several successive in the circumferential direction ball pocket members G each having a first ball pocket segment S1 and a second ball pocket segment S2, which in turn are each made as Blechumformteile. Each ball pocket segment S1, S2 has a first and a second connecting web 1 . 2 on. Between these two connection bars 1 . 2 each is a laterally bulging pocket skirt portion 3 intended. The ball pockets G are over the connecting webs 1 . 2 combined into a ring body. The ball bearing cage shown here is characterized in that the connecting webs 1 . 2 the adjacent ball pockets G are stacked alternately, so that between two connecting webs 1 . 2 respectively. 2 . 1 a ball pocket member G only a connecting bar 2 respectively. 1 the subsequent ball pocket member G is located.

In each junction is thus an outer 1 and an inner connecting bar 2 a spherical pocket member G. The joints between the ball pocket members are here axisymmetric to a symmetrical line p passing through the pocket center Z and perpendicular to the cage axis X.

The ball pocket segments S1, S2, or also the ball pocket members G formed thereby, are in the area of the mutually assembled connecting webs 1 . 2 by a connecting means 4 coupled, which is the quadruple packing of the connecting webs 1 . 2 . 2 . 1 interspersed.

How out 2 can be seen form the first connecting bar 1 and the second connection bridge 2 Each ball pocket segment has an upper and a lower seat surface FO1, FU1, FO2, FU2 and the first connection web 1 and the second connection bridge 2 a ball pocket segment S1, S2 are laterally offset parallel to each other such that the lower seat surface FU1 of the first connecting web with the upper seat surface of the second connecting web 2 flees. This concept makes it possible to design all ball pocket segments S1, S2 of the cage in the same way. For further clarification, two planes E1, E2 are shown in this illustration, which pass through the lower seat surface FU1 of the first connecting web 1 and the lower seat FU2 of the second connecting bar 2 are defined. These two planes E1, E2 are mutually parallel and offset by an offset v against each other. This offset dimension v corresponds to the material thickness t of the second connecting web 2 ,

In 3 the ball bearing cage according to the invention is shown in a state in which each balls 5 are inserted into the ball guide pockets K. The circumferentially succeeding ball guide pockets K embrace the ball received therein each 5 at the height of an orbit of the ball center Z and lead the balls 5 ,

To describe the contour of the ball guide pocket K, a projection plane P is introduced. This projection plane P is perpendicular to a projection axis p. This projection axis p passes through the corresponding spherical center Z and intersects the cage axis X vertically. The ball pocket segments S1, S2 are geometrically designed such that each of the ball guide pockets K thus formed is polygonal in a projection into the respective projection plane P. In addition, this varies the respective ball 5 encompassing ball pocket segment S1, S2 in the course of the respective ball in terms of its cross-sectional shape.

In the exemplary embodiment shown here, the respective ball pocket segment S1, S2 has cross sections, whose inner edges facing the pockets of the pockets represent a contour which is concave in different depths with respect to the pocket interior. The ball pocket inner wall formed by the ball pocket segments S1, S2 forms wall zones of pronounced concavity and wall zones without or with a small concavity. The zones of pronounced concavity here form those guide surfaces which the respective sphere 5 support in the direction of rotation. The zones without or with low concavity form those guide or contact surfaces which the ball bearing cage laterally to the balls 5 to lead.

The ball bearing cage according to the invention shown here is designed in such a way that each ball guide pocket K has a pair of mutually opposite, substantially planar lateral guide flanks 3a . 4a forms. These side guide flanks 3a . 4a are over transverse flanks 3b . 3c respectively. 4b . 4c to the connection bars 1 . 2 tethered. The transition between the side leading edges 3a . 4a to the transverse flanks 3b . 3c . 4b . 4c takes place via radius zones ZR1, ZR2, ZR3, ZR4. The radii which can be seen here are preferably significantly smaller than the sphere radius of the sphere 5 , The mutually adjacent transverse flanks 3b . 4b respectively. 3c . 4c are aligned so that they form an angle W1 in the plan view shown here which is blunt.

Every lateral flank 3b . 4b . 3c . 4c forms a channel concave channel cross-section of this cross-section forms as follows in connection with 4 to be executed will be an outer and an inner ball contact zone.

In 4 is the cross section Q1 of the ball guide pocket K material in the in 3 Plotted sectional plane XX shown. This cross-section Q1 forms an outer and an inner ball contact zone Ka, Ki. As can be seen, the channel cross-section is designed in such a way that when the ball abuts the ball contact zones Ki, Ka between the channel bottom Rm and the ball 5 a sickle-shaped or curved lens-shaped inner gap S remains. The "concavity in cross section Q1 is greater than the convexity of the sphere 5 ". These designs for the transverse flank 3b apply mutatis mutandis to the cross-section also shown cut here 4c , as well as for the transverse flanks, not shown 4b and 3c ,

In 5 an inventive deep groove ball bearing is shown which is equipped with a ball bearing cage according to the invention. This ball bearing comprises an inner bearing ring 11 and an outer bearing ring 12 , As can be seen particularly clearly in this illustration, have the connecting sections shown here cut 3a . 4a Rectangular cross-sections on and form plan surfaces P1, P2 at which the ball 5 if necessary can start. It is possible the running game of the ball 5 between the employed transverse flanks 3b . 3c . 4b . 4c (see. 1 ) so that the ball 5 through the transverse flanks 3b . 3c . 4b . 4c is supported before it reaches the flat surfaces P1, P2. Preferably, however, the running games are tuned so that in principle a contacting of the planar surfaces P1, P2 by the ball 5 is possible.

The recognizable here, through the connecting sections 3a . 3b Planar surfaces P1, P2 formed in conjunction with the ball 5 Lubricant storage column L1, L2, L3, L4 in which lubricant can accumulate under moderate shear stress in the interior of the ball bearing cage.

In the upper part of the sectional view, the layering is illustrated in the connection area between two ball pocket members. There is always a connecting section here 2 . 1 a ball pocket member G between connecting webs 1 . 2 the subsequent ball pocket member G. On the representation of this connection area in 1 is referred in this regard.

6 shows a deep groove ball bearing according to the invention in a side view. The ball bearing cage is guided by rolling elements and therefore can not be used on the bearing inner ring 11 or at the bearing outer ring 12 start. All ball pocket segments S1 of the cage are of identical construction. This is made possible by the special connection concept of the ball pocket members G. This ball bearing cage can after inserting the balls 5 be mounted in the corresponding grooves. This can preferably be done lying in an auxiliary tool which fixes the lower layer of the preferably slightly stapled lower ball bag segments. This auxiliary tool can have positioning pins which engage in the flank bores B which can be seen here and thus precisely position the ball pocket segments. Subsequently, after placing the detectable here front ball bag segments S1, the joints are riveted and the cage thus forms a substantially rigid structure.

7 shows in the form of a perspective view of a ball bearing cage of the invention as such from a single variant identical double pocket segments after 8th is composed.

The ball bearing cage forms a plurality of circumferentially successive ball pockets K which are formed by ball pocket segments S1, S2 which are each manufactured as Blechumformteile, each ball pocket segment S1, S2 a first and a second connecting web 1 . 2 and between these two connecting webs 1 . 2 here two laterally bulging pocket wall sections M1, M2 forms. The ball pocket segments S1, S2 are over the connecting webs 1 . 2 combined into a ring body. Also in this embodiment, the geometry of the connecting webs 1 . 2 the ball bag segments adjusted so that the ring body altogether composed of identical ball bag segments S1, S2.

Again, at each ball pocket segment S1, S2 form the first connecting web 1 and the second connection bridge 2 each an upper and a lower seat surface FO1, FU1, FO2, FU2 wherein the first connecting web 1 and the second connection bridge 2 a ball pocket segment S1, S2 are axially offset from one another such that the lower seat surface FU1 of the first connecting web 1 with the upper seat FO2 of the second connecting web 2 flees. The first connection bridge 1 "Practically hangs on a leg that is shorter by the sheet thickness".

The two-pocket segment shown here forms a connecting bridge web 10 , This connecting bridge 10 forms a lower seat FU10. This under seat FU10 is aligned with the lower seat FU2 of the second connecting web 2 , The two-pocket segments are assembled such that a connecting bridge web 10 each bridge a joint between two Zeitaschen segments which are located on the opposite side of the ring body. On the lower seat FU10 of the connecting bridge web 10 thus sits the lower seat FU2 a second connecting bar 2 an axially opposite two-pocket segment. On the back or top FO2 of this connection bar 2 sits the bottom FU1 of a first connecting bar 1 ,

8th shows a perspective view of a second pocket segment of the cage according to the invention 7 , The two-pocket segment forms two lateral bulges to form ball pockets K1, K2. Between these is the connecting bridge 10 , The here the viewer facing side of the connecting web forms in the terminology of this description, the lower seat FU10. This lower seat FU10 is aligned with the lower seat FU2 of the second connecting web 2 , The lower seat FU1 of the first connecting bar 1 Aligns with the here facing away from the viewer upper seat FO2 of the second connecting bar 2 ,

nine shows a side view of the ball bearing cage after 7 to illustrate the height offset of the connecting webs and the segment bridging. In this illustration, for better visibility, the side surface of one of the identical two-pocket segments is shown as a blackened surface. The connection bridge section 10 bridges the overlap point of the two two-pocket segments S1 which are located on the cage side axially opposite the two-pocket segment S2. On the bottom FU10 of the connecting bridge section 10 sits a second connecting bridge 2 a second pocket segment S2. On this turn, sits a first connecting bridge 1 which hangs on a "shortened thigh". Because each overlap site is connected by a connecting bridge section 10 is bridged, results in a highly rigid ring body. In the area of the overlapping point, the stratification is riveted. With regard to the geometry of the ball guide pockets in the plan view is based on the comments on Eintaschensegment variant of the 1 to 6 directed.

LIST OF REFERENCE NUMBERS

1

connecting web

2

connecting web

3

Pocket jacket section

3a

Cage or side leading edge

3b

cross edge

3c

cross edge

4

connecting means

4a

Cage or side leading edge

4b

cross edge

4c

cross edge

5

Bullet

10

Connecting bridge section or dock

11

inner bearing ring

12

outer bearing ring

E1

level

E2

level

FO1

upper seat

FU1

lower seat

FO2

upper seat

FU2

lower seat

G

Ball pocket element

ka

outer ball contact zone

Ki

inner ball contact zone

K

Ball guide pocket

K1

ball pocket

K2

ball pocket

P

projection plane

p

projection axis

Q1

cross-section

rm

channel base

S1

Ball pocket segment

S2

Ball pocket segment or also second pocket segment

v

offset dimension

W1

angle

X

cage axis

XX

cutting plane

Z

ball center

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 3939438 A1 [0002]
• JP 2007-292195 A [0003]
• US 3820867 A [0004]

Claims (10)

Ball bearing cage with a plurality of circumferentially successive ball pockets (K) which are formed by ball pocket segments (S1, S2), which are each manufactured as Blechumformteile, each ball pocket segment (S1, S2) a first and a second connecting web ( 1 . 2 ) and between these two connecting webs ( 1 . 2 ) at least one laterally bulging pocket casing section is provided and wherein the ball bag segments (S1, S2) are formed by overlapping the connecting webs ( 1 . 2 ) are combined to form a ring body, characterized in that the geometry of the connecting webs (S1, S2) of the ball bag segments is tuned such that the ring body composed of on both sides identical ball bag segments (S1, S2). Ball bearing cage according to claim 1, characterized in that the first connecting web ( 1 ) and the second connecting bridge ( 2 ) each form an upper and a lower seat surface (FO1, FU1, FO2, FU2) and that the first connecting web ( 1 ) and the second connecting bridge ( 2 ) of a ball pocket segment (S1, S2) are offset from one another in such a way that the lower seat surface (FU1) of the first connecting web (FIG. 1 ) with the upper seat surface (FO2) of the second connecting web (FIG. 2 ) flees. Ball bearing cage according to claim 1 or 2, characterized in that in each case a pair of ball pocket segments forms ball pocket members (G) and that the connecting webs ( 1 . 2 ) of the adjacent ball pocket members (G) are stacked alternately, so that between two connecting webs ( 1 . 2 ) of a ball pocket member (G) only one connecting web ( 2 . 1 ) of the adjoining ball pocket member (G). Ball bearing cage according to claim 3, characterized in that the ball pocket segments (S1, S2) in the region of the connecting webs ( 1 . 2 ) by a connecting means ( 4 ), which the connecting webs ( 1 . 2 ) interspersed. Ball bearing cage, at least according to the preamble of patent claim 1, characterized in that the pocket shell portions of a ball pocket segment are geometrically designed such that the thus formed ball guide pocket (K) is polygonal in plan view. Ball bearing cage according to claim 5, characterized in that the respective ball ( 5 ) encompassing pocket wall portion in the course of the respective ball ( 5 ) varies in terms of its cross-section (Q1, Q2) and that in this case the respective pocket wall portion cross-sections (Q1, Q2), the interior of the pockets facing the inner edges (Ki1, Ki2) describe a different depth concave contour. Ball bearing cage according to claim 5 or 6, characterized in that the bulging inner wall ( 6 ) of the pocket wall portion has wall zones of pronounced concavity and wall zones without or with a small concavity. Ball bearing cage according to at least one of claims 5 to 7, characterized in that the zones of pronounced concavity those guide flanks ( 3b . 3c . 4b . 4c ), which the respective ball ( 5 ) in the direction of rotation, and that the zones have apex, or with a low concavity, those cage edges ( 3a . 4a ) which form the ball bearing cage laterally on the balls ( 5 ) to lead. Ball bearing cage according to at least one of claims 5 to 8, characterized in that the ball bearing cage is designed such that each ball guide pocket (K) has a pair of opposing, substantially planar side guide flanks ( 3a . 4a ) and that the side leading edges ( 3a . 4a ) over transverse flanks ( 3b . 3c . 4b . 4c ) to the connecting sections ( 1 . 2 ) are connected. Ball bearing cage according to claim 9, characterized in that the lateral guiding flanks ( 3a . 4a ) over radius ranges (ZR1, ZR2, ZR3, ZR4) with the transverse flanks ( 3b . 3c . 4b . 4c ) are connected, and that two adjacent transverse edges ( 3b . 4b ; 3c . 4c ) are at an obtuse angle (W1) to each other, and that each transverse flank ( 3b . 4b ; 3c . 4c ) one to the ball ( 5 ) has concave channel cross-section (Q1) and forms an outer and an inner ball contact zone (Ki, Ka).

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