DE102007060565A1 - Wheel module, in particular for the driven wheels of passenger vehicles - Google Patents

Abstract

The invention relates to a wheel module (1) for the driven wheels of passenger vehicles, consisting essentially of a hollow cylindrical wheel hub (2) with an outer bearing seat (4), a hollow cylindrical wheel carrier (5) with an inner bearing seat (6) and between the Wheel hub (2) and the wheel carrier (5) arranged multi-row skew bearings (7) whose outer bearing ring (8) integrally formed and in the bearing seat (6) of the wheel carrier (5) is pressed, while the inner bearing ring (11a, 11b) in two parts formed and on the bearing seat (4) of the wheel hub (2) is pressed, wherein between the outer bearing ring (8) and the inner bearing ring (11a, 11b) of the angular rolling bearing (7) a plurality in at least two rows juxtaposed and by at least two Bearing cages (14, 15) in the circumferential direction at regular intervals held each other rolling elements (16, 17, 18, 19) are arranged, which in on the inside (24) of the Rolling race (8) and in the outer sides (25a, 25b) of the inner bearing ring (11a, 11b) incorporated raceways (26, 27, 28, 29 and 30, 31, 32, 33) roll. According to the invention, the rolling elements (16, 17, 18, 19) of the angular rolling bearing (7) are each formed by two O-arrangement against each other employed double row ball rollers with parallel pressure angle axes (34, 35, 36, 37), each symmetrically from a Ball base flattened and arranged parallel to each other side surfaces (38, ...

Description

Field of the invention

The The invention relates to a wheel module according to the preamble Features of claim 1, and in particular advantageous on wheel modules for the driven wheels of Passenger vehicles feasible.

Background of the invention

the It is common knowledge in the field of rolling bearing technology known that the wheel modules of motor vehicles, the vehicle wheels in all driving conditions of the motor vehicle and the associated Stress must lead exactly. The stress the wheel modules are influenced by a variety of factors, of which the wheel load, the road condition, the additional Cornering loads, driving time and average speeds in the individual driving conditions of particular importance are. Besides, also the kind of the tires, the fall of the tire Rades, the size of the braking forces and - at driven wheels - the driving forces on the tire, the stress on the wheel modules. However, these factors are difficult to detect submit to the selection and interpretation the associated wheel bearing especially the during the most common driving conditions of the motor vehicle based on the wheel bearing forces. outgoing This is why they have as a wheel bearing for the wheel modules heavy commercial vehicles especially in O arrangement against each other employed tapered roller bearings because of their high load capacity and wear resistance proved to be particularly suitable while for wheel modules of light passenger vehicles especially double-row angular contact ball bearings of the first, second or third integration stage in single or tandem arrangement for use come.

Such trained wheel module for passenger vehicles, for example, from DE 39 40 395 A1 and from the DE 103 31 936 A1 previously known and consists essentially of a hollow cylindrical hub with a radial mounting flange and an outer bearing seat, a hollow cylindrical wheel carrier with an inner bearing seat and arranged between the wheel hub and the wheel carrier double-row angular contact ball bearings. The outer bearing ring of this angular contact ball bearing is integrally formed and pressed with an end face on a rotating ring land in the wheel carrier fitting in the bearing seat, while the inner bearing ring of the angular contact ball bearing is formed in two parts and pressed against one end face of a rotating annular land on the wheel hub fitting on the bearing seat , Between the outer bearing ring and the inner bearing ring of the oblique roller bearing in each case a plurality of juxtaposed bearing balls are arranged in two rows, which are held by two bearing cages in the circumferential direction at regular intervals and with their running surfaces in the inside of the outer bearing ring and in the Unroll the outer sides of the inner bearing ring incorporated groove-shaped raceways.

When However, it has proved disadvantageous in such a wheel module, that the associated angular contact ball bearings with relative must be designed large bearing balls, to the stresses described above during the individual driving conditions of the motor vehicle durably th to be able to. This inevitably has the consequence that that also the bearing rings of the angular contact ball bearing and thus also the wheel hub and the wheel carrier of the wheel module with accordingly large axial lengths and with accordingly large outside diameters are performed must and therefore for a relatively high weight the wheel module are causal, which in unwanted Way enters the unsprung masses on the vehicle and thus the Rolling, spring and steering comfort of the passenger vehicle negatively influenced. Although it would be conceivable, this disadvantage through the use of smaller bearing types, for example by To eliminate tapered roller bearings, but cause these camps known a high frictional resistance in the wheel module and thus a reduction in performance and increased fuel consumption of the motor vehicle and would only be through costly changes the surrounding construction can be used. In addition, has a wheel module with a double row angular contact bearing also from the perspective of the necessary material and manufacturing costs proved to be relatively expensive.

Object of the invention

outgoing from the stated disadvantages of the known prior art Therefore, the invention is based on the object, a cost producible wheel module, in particular for the driven Wheels of a passenger vehicle to design, the at the same power or load rating as a comparable known Wheel module with a double row angular contact ball bearing without modifications the surrounding structure to reduce the unsprung Masses contributes to the vehicle.

Description of the invention

According to the invention this object is achieved in a wheel module according to the preamble of claim 1 such that the rolling elements of the oblique gear Bearings are each formed by two O-arrangement against each other employed double row ball rollers with parallel pressure angle axes, each having two symmetrically flattened from a spherical base and arranged parallel to each other side surfaces and a reduced diameter of their ball base, so that by the formation of the rolling elements, the angular contact bearings and the wheel hub with axially shorter lengths and the skew roller bearing and the wheel carrier with smaller outer diameters are executable and the wheel module thereby has a reduced total mass.

Of the The invention is therefore based on the finding that it by the Resolution of the known two rows of large bearing balls in each case two double rows of smaller ball rollers as rolling elements for the angular contact bearing of the wheel module possible is the formation of the rolling elements as well as the narrow career distances between the individual To use rows of rolling stock for especially the bearing rings of the angular contact bearing and the wheel hub axially shorter and the angular contact bearing and the wheel carrier beyond that with smaller ones Form outer diameters and thus their mass material to reduce. This is opposite wheel modules with double row Angular contact ball bearings with the same or higher radial and axial load capacity a reduction mass of the wheel hub about 2%, the wheel carrier about 14% and the angular contact bearing by about 25% for a wheel module with a four-row ball roller bearing achievable.

preferred Embodiments and advantageous developments of the invention formed Wheel module are described in the subclaims.

After that it is according to claim 2 in the inventively designed Wheel module provided that the respective adjacent rolling elements the two double rows of Schrägwälzlagers with their mutually facing side surfaces immediately next to each other, each on common, perpendicular to the pressure angle axes running Transverse axes arranged and these side surfaces at the same time are designed as mutual guide surfaces. By This training will be the resulting on the ball rollers parallel Side surfaces simultaneously to an automatic mutual guidance of the ball rollers in their careers used, so that in connection with the with bearing balls variable, but in the case of ball rollers constant axes of rotation same and in cooperation with a corresponding bearing cage a otherwise probable in such rolling elements Cabinets or Quertaumeln almost excluded in their careers can be.

To Claim 3, it is a further feature of the invention formed Wheel module that the rolling elements of each double row of the angular contact bearing preferably different Have radii on their treads or alternatively each Double row of rolling elements with equal radii is formed on their treads. In a wheel bearing a Passenger car through a two twin rows of ball castors trained Schrägwälzlager it has it with regard to the radial and axial forces to be absorbed proved most advantageous, the respective outer Rows of ball rollers starting from a larger one Ball basic shape with a larger radius at their To form treads and for the treads the respective inner rows of ball rollers starting from a smaller Ball basic shape to provide a smaller radius. For other applications Such Schrägwälzlager or other wheel bearings However, it may also be advantageous, each double row of ball rollers with equal radii on their treads form or Also, instead of double rows, two triple rows of ball rollers and the individual rows of ball rollers with the same and form uneven radii on their treads or the radii of the treads in other possible Combine shapes with each other.

According to claim 4, the invention is formed Wheel module also still characterized by the fact that the rolling elements each double row of the angular contact bearing preferred have different widths between the side surfaces or alternatively with the same width between their side surfaces are formed. Also in this regard, it has a Wheel bearing of a passenger vehicle by one with two double rows Ball rollers trained skew bearings in terms the radial and axial forces to be absorbed as advantageous proved to roll each outer rows of the ball starting with a larger ball basic shape a larger width between their side surfaces train and for the treads of each inner rows of ball rollers starting from a smaller ball base one provide smaller width between the side surfaces. However, it can also be used in other applications of such Schrägwälzlagers or other wheel bearings be advantageous to train each row of ball rollers with the same width or in skew bearings with more than two rows of ball rollers on each side the individual rows of ball rollers with equal and unequal widths or their widths in other possible forms to combine with each other.

An expedient development of the inventively embodied wheel module, it is further claim that the respective ge common transverse axes arranged rolling elements of the two double rows of the angular contact bearing preferably in common pockets of the preferably designed as a window cages bearing cages are arranged. This has proven to be particularly advantageous in that on the one hand the mutual guidance of the respective adjacent rolling elements of both double rows of the angular contact bearing is made possible and on the other hand, the installation costs for the wheel module are significantly reduced. However, should such mutual guidance of the adjacent rolling elements not be provided, it is alternatively also possible to guide the ball rollers of the two double rows of each angular roller bearing instead of common pockets of a window cage in the separate pockets of two comb or snap cages.

After all It is designed as an advantageous embodiment of the invention Wheel module by claim 6 nor suggested that the treads the rolling elements of each double row of the angular contact bearing preferably the same radius as the groove-shaped Runways have in the bearing rings and with these in line contact stand. Such a training is therefore possible because the trained as ball rollers rolling elements in contrast to conventional bearing balls a constant Have axis of rotation. The resulting line contact between the ball rollers and their groove-shaped raceways has doing the advantage that thereby a uniform Surface pressure with low voltage level between the Ball rollers and the raceways is achieved.

In summary has the wheel module designed according to the invention thus compared to those known from the prior art Wheel modules with double row angular contact ball bearings have the advantage on top of this by using a skewed bearing with ball rollers as rolling elements through a minimized axial and radial size as well as a reduced Weight for the same or increased load capacity distinguished. Since such ball rollers similarly inexpensive how conventional bearing balls are produced and also the production cost of the used angular contact bearing which is comparable to angular contact ball bearings, can by the reduced material costs and the reduced weight too of low production costs for the inventively designed wheel module be assumed.

Brief description of the drawings

A preferred embodiment of the invention formed Wheel module will be described below with reference to the accompanying drawings explained in more detail. Showing:

1 a half-view of a cross section through an inventively designed wheel module;

2 the enlarged view of the angular contact bearing of the wheel module according to the invention according to detail X in 1 ,

Detailed description the drawings

Out 1 clearly goes a wheel module 1 for the driven wheels of a passenger vehicle, which essentially consists of a hollow cylindrical wheel hub 2 with a radial mounting flange 3 and an outer bearing seat 4 , a hollow cylindrical wheel carrier 5 with an inner bearing seat 6 and one between the wheel hub 2 and the wheel carrier 5 arranged multi-row angular contact bearings 7 consists. The outer bearing ring 8th this skew roller bearing 7 is integrally formed and with a front side 9 on a circumferential ring web 10 in the wheel carrier 5 lying in their bearing seat 6 pressed in, while the inner bearing ring 11a . 11b formed in two parts and with a front side 12 on a circumferential ring web 13 at the wheel hub 2 lying on their bearing seat 4 is pressed on. In addition, between the outer bearing ring 8th and the inner bearing ring 11a . 11b of the angular contact bearing 7 each a plurality of juxtaposed rolling elements 16 . 17 . 18 . 19 arranged by two storage cages 14 . 15 held in the circumferential direction at regular intervals to each other and, as in 2 shown with their treads 20 . 21 . 22 . 23 on the inside 24 of the outer bearing ring 8th and in the outsides 25a . 25b of the inner bearing ring 11a . 11b integrated raceways 26 . 27 . 28 . 29 and 30 . 31 . 32 . 33 roll.

Furthermore, by the in 2 shown enlarged view of the detail X according to 1 clearly that the rolling elements 16 . 17 . 18 . 19 of the angular contact bearing 7 by two each in O arrangement against each other employed double rows ball rollers with parallel pressure angle axes 34 . 35 . 36 . 37 are formed, each two symmetrically flattened from a spherical base shape and arranged parallel to each other side surfaces 38 . 39 . 40 . 41 and 42 . 43 . 44 . 45 and have a reduced diameter of their ball base shape, so that by the formation of the rolling elements 16 . 17 . 18 . 19 , like out 1 visible, the angular contact bearings 7 and the wheel hub 1 with axially shorter overall lengths B _L , B _N and the angular contact bearing 7 and the wheel carrier 5 with smaller outer diameters D _L , D _{R are} executable and the wheel module 1 thereby having a reduced total mass. As a result, compared with wheel modules with double-row angular contact ball bearings with the same or higher radial and axial load capacity, a reduction mass of the wheel hub about 2%, the wheel carrier by about 14% and the angular contact bearing by about 25% achievable.

Likewise is off 2 it can be seen that the respective adjacent rolling elements 16 . 17 and 18 . 19 the two double rows of the angular contact bearing 7 with their facing side surfaces 39 . 40 and 43 . 44 immediately next to each other, each on a common, perpendicular to the pressure angle axes 34 . 35 . 36 . 37 extending transverse axes 46 . 47 arranged and these side surfaces 39 . 40 and 43 . 44 at the same time designed as mutual guide surfaces. This is in connection with the constant rotation of ball rollers and in cooperation with the bearing cages 14 . 15 a case of such rolling elements otherwise likely transverse staggering in their careers 26 . 27 . 28 . 29 and 30 . 31 . 32 . 33 effectively avoided.

Only suggestively goes out 2 also apparent that the rolling elements 16 . 17 and 18 . 19 each double row of the angular contact bearing 7 preferably different radii on their treads 20 . 21 . 22 . 23 have and with different widths between the side surfaces 38 . 39 . 40 . 41 and 42 . 43 . 44 . 45 are formed. With regard to the radial and axial forces to be absorbed by the angular contact bearing 7 It is most advantageous, the respective outer rows 16 . 19 the ball rollers starting from a larger ball basic shape with a larger radius at their treads 20 . 23 and a larger width between their side surfaces 38 . 39 and 44 . 45 form while the inner rows 17 . 18 the ball rollers starting from a smaller ball base on their treads 21 . 22 have a smaller radius and between their side surfaces 40 . 41 and 42 . 43 are formed with a smaller width. This is shown by the treads 20 . 21 . 22 . 23 the rolling elements 16 . 17 . 18 . 19 the two double rows of the angular contact bearing 7 the same radius as their groove-shaped raceways 26 . 27 . 28 . 29 and 30 . 31 . 32 . 33 in the bearing rings 8th . 11a . 11b on and with these in an advantageous line contact, through the even surface pressure with low stress level between the ball rollers and the raceways 26 . 27 . 28 . 29 and 30 . 31 . 32 . 33 while increasing the carrying capacity of the angular contact bearing 7 is reached.

Finally is off 2 still evident that each on common transverse axes 46 . 47 arranged rolling elements 16 . 17 and 18 . 19 the two double rows of the angular contact bearing 7 preferably in common bags 48 . 49 preferably designed as a window cages bearing cages 14 . 15 are arranged. This has the advantage that on the one hand the mutual guidance of the respective adjacent rolling elements 16 . 17 and 18 . 19 both double rows of the angular contact bearing 7 and on the other hand at the same time the installation costs for the wheel module 1 be lowered considerably.

1

wheel module

2

Wheel hub of 1

3

Mounting flange on 2

4

Bearing seat on 2

5

Wheel carrier of 1

6

Bearing seat in 5

7

Schrägwälzlager of 1

8th

outer bearing ring of 7

9

Front side of 8th

10

Ring bridge in 5

11a

inner bearing ring of 7

11b

inner bearing ring of 7

12

Front side of 11a

13

Ring web on 2

14

Bearing cage of 7

15

Bearing cage of 7

16

Rolling elements in 14

17

Rolling elements in 14

18

Rolling elements in 15

19

Rolling elements in 15

20

Tread of 16

21

Tread of 17

22

Tread of 18

23

Tread of 19

24

Inside of 8th

25a

Outside of 11a

25b

Outside of 11b

26

Career of 16 in 24

27

Career of 16 in 25a

28

Career of 17 in 24

29

Career of 17 in 25a

30

Career of 18 in 24

31

Career of 18 in 25b

32

Career of 19 in 24

33

Career of 19 in 25b

34

Pressure angle axis of 16

35

Pressure angle axis of 17

36

Pressure angle axis of 18

37

Pressure angle axis of 19

38

Side surface of 16

39

Side surface of 16

40

Side surface of 17

41

Side surface of 17

42

Side surface of 18

43

Side surface of 18

44

Side surface of 19

45

Side surface of 19

46

Transverse axis of 16 . 17

47

Transverse axis of 18 . 19

48

Bag of 16 . 17 in 14

49

Bag of 18 . 19 in 15

B _L

Width of 7

B _N

Width of 2

D _L

Outside diameter of 7

D _R

Outside diameter of 5

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 3940395 A1 [0003]
• - DE 10331936 A1 [0003]

Claims (6)

Wheel module ( 1 ), in particular for the driven wheels of passenger vehicles, essentially consisting of a hollow-cylindrical wheel hub ( 2 ) with a radial mounting flange ( 3 ) and an outer bearing seat ( 4 ), a hollow cylindrical wheel carrier ( 5 ) with an inner bearing seat ( 6 ) and one between the wheel hub ( 2 ) and the wheel carrier ( 5 ) arranged multi-row angular contact bearings ( 7 ), whose outer bearing ring ( 8th ) formed in one piece and with a front side ( 9 ) on a circumferential annular web ( 10 ) in the wheel carrier ( 5 ) lying in their bearing seat ( 6 ) is pressed while its inner bearing ring ( 11a . 11b ) formed in two parts and with a front side ( 12 ) on a circumferential annular web ( 13 ) at the wheel hub ( 2 ) lying on its bearing seat ( 4 ) is pressed, wherein between the outer bearing ring ( 8th ) and the inner bearing ring ( 11a . 11b ) of the angular contact bearing ( 7 ) each have a plurality in at least two rows arranged side by side and by at least two bearing cages ( 14 . 15 ) in the circumferential direction at regular intervals held each other rolling elements ( 16 . 17 . 18 . 19 ) arranged with their treads ( 20 . 21 . 22 . 23 ) on the inside ( 24 ) of the outer bearing ring ( 8th ) and the outsides ( 25a . 25b ) of the inner bearing ring ( 11a . 11b ) incorporated raceways ( 26 . 27 . 28 . 29 and 30 . 31 . 32 . 33 ), characterized in that the rolling elements ( 16 . 17 . 18 . 19 ) of the angular contact bearing ( 7 ) by two in each case O-arrangement against each other employed double row ball rollers with parallel pressure angle axes ( 34 . 35 . 36 . 37 ) are formed, each having two symmetrically flattened from a spherical base shape and arranged parallel to each other side surfaces ( 38 . 39 . 40 . 41 and 42 . 43 . 44 . 45 ) and a reduced diameter of their ball base shape, so that by the formation of the rolling elements ( 16 . 17 . 18 . 19 ) the angular contact bearing ( 7 ) and the wheel hub ( 1 ) with axially shorter overall lengths (B _L , L _N ) and the angular contact bearing ( 7 ) and the wheel carrier ( 5 ) with smaller outer diameters (D _L , D _R ) are executable and the wheel module ( 1 ) thereby having a reduced total mass. Wheel module according to claim 1, characterized in that the respective adjacent rolling elements ( 16 . 17 and 18 . 19 ) of the two double rows of the angular contact bearing ( 7 ) with their mutually facing side surfaces ( 39 . 40 and 43 . 44 ) immediately next to each other, each at a common, perpendicular to the pressure angle axes ( 34 . 35 . 36 . 37 ) transverse axes ( 46 . 47 ) and these side surfaces ( 39 . 40 and 43 . 44 ) are also designed as mutual guide surfaces. Wheel module according to claim 2, characterized in that the rolling bodies ( 16 . 17 and 18 . 19 ) of each double row of the angular contact bearing ( 7 ) preferably different radii on their running surfaces ( 20 . 21 . 22 . 23 ) or, alternatively, each double row of rolling elements ( 16 . 17 . 18 . 19 ) with equal radii on their running surfaces ( 20 . 21 . 22 . 23 ) is trained. Wheel module according to claim 2, characterized in that the rolling bodies ( 16 . 17 . 18 . 19 ) of each double row of the angular contact bearing ( 7 ) preferably different widths between their side surfaces ( 38 . 39 . 40 . 41 and 42 . 43 . 44 . 45 ) or alternatively with the same width between their side surfaces (FIG. 38 . 39 . 40 . 41 and 42 . 43 . 44 . 45 ) are formed. Wheel module according to claim 2, characterized in that in each case on common transverse axes ( 46 . 47 ) arranged rolling elements ( 16 . 17 and 18 . 19 ) of the two double rows of the angular contact bearing ( 7 ) preferably in common pockets ( 48 . 49 ) preferably designed as window cages bearing cages ( 14 . 15 ) are arranged. Wheel module according to claim 2, characterized in that the running surfaces ( 20 . 21 . 22 . 23 ) of the rolling elements ( 16 . 17 . 18 . 19 ) of each double row of the angular contact bearing ( 7 ) preferably the same radius as their groove-shaped tracks ( 26 . 27 . 28 . 29 and 30 . 31 . 32 . 33 ) in the bearing rings ( 8th . 11a . 11b ) and are in line contact with them.