DE102014008377A1 - Wheel flange joint housing arrangement for a side shaft of a vehicle - Google Patents

Abstract

The invention relates to a wheel flange joint housing arrangement (10) for a side shaft for transmitting torques between a differential and a wheel of a vehicle, with a joint housing (12) for a constant velocity joint and with a wheel flange (14) to which the wheel can be attached, wherein the wheel flange (14) is arranged on an inner ring (16) formed separately from the wheel flange (14) and separately from the joint housing (12), the first end toothing (18) of which engages with a corresponding second end toothing (20) of the joint housing (12) stands.

Description

The invention relates to a wheel flange joint housing arrangement for a side shaft of a vehicle, in particular a motor vehicle, according to the preamble of patent claim 1.

Such a wheel flange joint housing arrangement for a side shaft of a vehicle, in particular of a motor vehicle, for example, already from the DE 10 2005 054 283 A1 to be known as known. The side shaft serves to transmit torques between a differential and a wheel, over which the vehicle rolls, for example, when driving forwards on a road. The wheel flange joint housing assembly includes a constant velocity joint housing, which is also referred to as a constant velocity universal joint or homokinetic joint. In addition, the wheel flange joint housing arrangement has a wheel flange, to which the wheel can be fastened. Via the wheel flange and the joint housing, the torques can be transmitted from the differential to the wheel or vice versa, so that, for example, the wheel and the vehicle as a whole can be driven by means of a drive unit, in particular an internal combustion engine.

Object of the present invention is to provide a Radflansch joint housing assembly of the type mentioned, which is mounted in a particularly simple manner.

This object is achieved by a wheel flange joint housing assembly with the features of claim 1. Advantageous embodiments with expedient developments of the invention are specified in the remaining claims.

In order to create a wheel flange joint housing arrangement of the aforementioned type, which is mounted in a particularly simple and thus time and cost-effective manner, it is provided according to the invention that the wheel flange is arranged on a separately formed from the wheel flange and separately from the joint housing inner ring, the first Spur toothing is in engagement with a corresponding second spur toothing of the joint housing. In other words, the inner ring, which is for example non-rotatably connected to the wheel flange, a first spur gear and the joint housing a second spur gear, wherein the spur gears are engaged, so that the joint housing is coupled to the inner ring and the spur toothing torques between the inner ring and the joint housing can be transferred. Characterized in that the inner ring is formed separately from the wheel flange and separately from the joint housing, a particularly cost-effective production and assembly of the wheel flange joint housing arrangement can be created. In addition, a particularly advantageous torque transmission between the inner ring and the joint housing can be created, since these are coupled to each other via the respective spur toothing. In particular, it is thereby possible to transfer particularly high torques between the inner ring and the joint housing and at the same time to keep the respective wall thicknesses, outer dimensions and thus the space requirement and the weight of the wheel flange joint housing arrangement as a whole particularly low.

It has proven particularly advantageous if the respective face toothing is designed as a cross-toothing. Such a cross-toothing is characterized in particular by the fact that it has a plurality of teeth which do not extend, for example, like a serration, in the radial direction and thus away from the inside to the outside in the radial direction, but extend at least substantially parallel to one another , In other words, for example, in contrast to a Hirth toothing, the respective cross toothing does not have any centric tooth lines which meet or intersect in the center or in a common center point arranged on an axis of rotation about which the wheel flange is rotatable, but the face toothing has straight and parallel rows of teeth. Compared to a Hirth toothing constructive benefits can be realized by the use of a cross-toothed, as for example, a self-locking and emergency running properties of the respective, designed as a cross-toothing spur toothing can be displayed.

In addition, it is possible to realize defined torques of at least one screw connection, by means of which the inner ring can be connected to the joint housing by connecting the front toothings. In addition, the respective cross-toothing can be produced in a particularly simple and cost-effective manner, for example by means of a machining production. Finally, it is possible to be able to transmit particularly high torques by means of the cross-toothing in a space-saving, cost and weight-saving manner. Furthermore, a particularly advantageous noise behavior of the wheel flange joint housing arrangement can also be created, since, for example, a so-called envelope cracking which possibly occurs in a spline connection can be avoided.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings; these show in:

1 a schematic longitudinal sectional view through a Radflansch-Gelenkgehäuseanordnung according to a first embodiment, with a joint housing for a constant velocity joint and with a wheel flange to which a wheel of a vehicle, in particular a motor vehicle, can be fastened, wherein the wheel flange on a separately from the wheel flange and separately from the joint housing formed inner ring is arranged, whose first spur toothing is formed as a cross-toothing and is in engagement with a corresponding, designed as a cross-toothed second spur toothing of the joint housing;

2 a schematic longitudinal sectional view through the wheel flange joint housing assembly according to a second embodiment;

3 a schematic perspective view of the inner ring according to the first embodiment;

4 a schematic and perspective longitudinal sectional view through the inner ring according to 3 ;

5 a schematic and perspective side view of the joint housing;

6 partial schematic side view of a group of teeth of the cross-toothing of the joint housing; and

7 a schematic and perspective plan view of the group of teeth according to 6 ,

In the figures, the same or functionally identical elements are provided with the same reference numerals.

1 shows in a schematic longitudinal sectional view of a wheel flange joint housing assembly 10 according to a first embodiment for a side shaft for transmitting torque between a differential, that is, a differential gear and a wheel of a vehicle, in particular a motor vehicle. The wheel flange joint housing arrangement 10 includes a joint housing 12 which is presently designed as an outer joint housing and thus as a joint part for a constant velocity joint of the side shaft. The joint housing 12 has, for example, inner peripheral side raceways for rolling elements, in particular balls, which partially in the raceways of the joint housing 12 intervention. In the joint housing 12 For example, another joint part in the form of an inner joint housing of the constant velocity joint can be arranged, wherein the inner joint housing has outer peripheral side raceways for the rolling elements. The rolling elements also engage partially in the outer peripheral side raceways of the inner joint housing, so that the outer joint housing 12 is positively connected via the rolling elements with the inner joint housing, whereby torques between the joint housings (joint parts) can be transmitted.

The constant velocity joint is also referred to as a homokinetic joint or constant velocity universal joint and serves for at least substantially uniform angular velocity and torque transmission from the side shaft to the wheel, over which the vehicle rolls when driving on a road. Torques for driving the wheel are provided, for example, by a drive unit, in particular an internal combustion engine, and via the wheel flange joint housing arrangement 10 transferred to the wheel, so that the wheel and thus the vehicle can be driven by the drive unit in total. Conversely, torques may also radiate from the wheel via the wheel flange joint housing assembly 10 be transferred to the drive unit, so that for example the internal combustion engine can be driven in a coasting operation of the wheel.

The wheel flange joint housing arrangement 10 includes a wheel flange 14 to which the wheel is fastened. Further, the wheel flange hinge housing assembly includes 10 an inner ring 16 on which the wheel flange 14 is arranged. The inner ring 16 is separate from the joint housing and separately from the wheel flange 14 trained and rotationally fixed with the wheel flange 14 connected. Furthermore, the inner ring 16 a cross-toothed first spur toothing 18 which engages with a corresponding second spur toothing formed as a cross-toothing 20 of the joint housing 12 stands. In 1 is an interface 22 the serrations 18 and 20 to recognize at which the serrations 18 . 20 are interconnected, that is, engaged. The serrations 18 and 20 are on respective end faces of the inner ring 16 and the joint housing 12 provided, these end faces at least substantially perpendicular to a rotation axis 24 run. The at the wheel flange 14 fixed wheel rotates with the wheel flange 14 , the inner ring 16 and the joint housing 12 around the axis of rotation 24 For example, relative to a structure of the vehicle when it rolls on the road over the wheel.

The inner ring 16 is on one on the joint housing 12 provided pin 26 disposed which in this case integral with the joint housing 12 is trained. Out 1 it can be seen that the pin 26 designed as a solid pin, that is solid. Alternatively, it is conceivable that the pin 26 is hollow as a hollow pin and thus at least in a longitudinal region. Alternatively or additionally, it is possible that the pin 26 separately from the joint housing 12 trained and connected to this, in particular non-destructive releasably connected, is. For example, the pin 26 by means of at least one screw connection to the joint housing 12 connected and thereby, if necessary, non-destructive, that is reversible from the joint housing 12 detachable and connectable with this. Is the pin 26 For example, designed as a hollow pin and with the joint housing 12 screwed, the hollow pin is formed as a hollow screw. As a result, for example, a simple mountability and disassembly of the wheel flange joint housing assembly 10 be created so that it can be easily maintained. Due to the at least partially hollow configuration of the pin 26 can the weight of the pin 26 and thus the wheel flange joint housing assembly 10 overall be kept very low.

The wheel flange 14 and the inner ring 16 each have at least one career 28 and 30 for respective rolling elements in the form of balls 32 and 34 on. About the balls 32 and 34 is the wheel flange joint housing arrangement 10 at an in 1 recognizable screw-on segment 35 a stub axle of the vehicle stored so that the wheel flange joint housing assembly 10 relative to the Anschraubsegment 35 around the axis of rotation 24 is rotatable. Through the careers 28 and 30 and through the balls 32 and 34 is created a rolling bearing or a rolling bearing, so that the wheel flange joint housing arrangement 10 particularly low friction on the screw-on segment 35 is rotatably mounted. In addition to the trained as ball raceways careers 28 and 30 can seal surfaces in the inner ring 16 and the wheel flange 14 be integrated. The aforementioned separate embodiment of the pin 26 from the joint housing 12 allows, for example, a simple disassembly of the bearing so that it can be serviced or replaced.

In the first embodiment, it is provided that the wheel flange 14 and the inner ring 16 by means of a flange 36 connected to each other, with the flanging 36 on the inner ring 16 is provided. In other words, the wheel flange 14 and the inner ring 16 crimped together. The curl 36 is on a joint housing 12 facing away from the end of the wheel flange 14 and in the wheel flange 14 arranged. This means that the wheel flange 14 the curl 36 covered in the radial direction to the outside. It can be provided that the flanging 36 by expanding the inner ring 16 is trained. The wheel flange joint housing arrangement 10 further comprises a screw element in the form of a nut 38 , which is a first thread in the form of an internal thread 40 having. The pin 26 points in its end area 42 a second thread in the form of an external thread 44 on, which with the internal thread 40 mother 38 corresponds. This is the mother 38 over her internal thread 40 on the external thread 44 of the inner ring 16 screwed on and, for example, under expansion of the inner ring 16 and thus forming the flange 36 against the inner ring 16 screwed and tightened. The inner ring 16 Like the whole rolling bearing or the wheel flange joint housing arrangement 10 be modular so that the wheel flange joint housing assembly 10 is designed as a module component, as the entire unit or assembly to the stub axle or the Anschraubsegment 35 can be screwed.

To realize a particularly high force or torque transmission, an additional shaft-hub connection can be provided, via which the inner ring 16 with the pin 26 rotatably connected. This additional shaft-hub connection represents an anti-rotation, by means of which undesired rotations of the inner ring 16 relative to the pin 26 can be avoided. Such a shaft-hub connection may comprise, for example, at least one feather key, which on the one hand form-fitting manner in the inner ring 16 and on the other hand positively in the pin 26 intervenes. Alternatively or additionally, the shaft-hub connection between the pin 26 and the inner ring 16 be designed as a spline, which at a in 2 shown second embodiment of the wheel flange joint housing assembly 10 provided and there with 46 is designated.

In the 2 shown second embodiment of the wheel flange joint housing assembly 10 differs in particular by the first embodiment that the flanging 36 not provided and by the spline 46 is replaced. Furthermore, in 2 recognizable that the mother 38 directly against the wheel flange 14 screwed and thus the wheel flange 14 touched, so the wheel flange 14 in the axial direction on the inner ring 16 by means of the mother 38 is secured. Preferably, it is provided that the pin 26 of the joint housing 12 in the inner ring 16 at least one, two or more locations and / or in the spline 46 is guided radially. This allows a desired concentricity and a uniform engagement of the respective cross-toothings (serrations 18 and 20 ). Furthermore, it may be alternatively or additionally provided that the wheel flange 14 and the inner ring 16 are connected to each other by means of at least one screw, so that the wheel flange 14 and the inner ring 16 reversibly releasably connected to each other. This makes it possible, for example, to disassemble the aforementioned bearing non-destructive and, for example, replace or maintain.

3 and 4 show the inner ring 16 according to the first embodiment with the spur toothing formed as a cross-toothing 18 , 5 shows the joint housing 12 with the spur toothing designed as a cross-toothing 20 , How very good 3 and 5 can be seen, has the respective spur toothing 18 and 20 a plurality of and in the present case four groups of teeth 48 on, which in the circumferential direction of the inner ring 16 and the joint housing 12 evenly distributed and spaced from each other. The respective tooth group 48 has a plurality of teeth 50 on which - in contrast to a Hirth toothing - not about centric and in one on the axis of rotation 24 arranged point intersecting, but at least substantially parallel to each other extending tooth lines. It has been shown that at a predetermined torque load, that is, at a predetermined torque transmission of one of the spur gears 18 and 20 on the other of the serrations 18 and 20 occurring stresses are at cross-teeth about 3 times smaller than in Hirth. In particular, in cross-toothing significantly reduced punctual loads occur as in the Hirth gearing. In addition, it has been found that the supporting portion, that is, the respective contact surface is at least substantially identical in cross and Hirth gears, but a much lower weight of the cross teeth can be compared to the Hirth gearing shown.

In addition, the use of a cross-toothing allows a particularly simple assembly of the wheel flange joint housing arrangement 10 create, since the assembly of the serrations 18 and 20 that is threading the teeth 50 in corresponding corresponding tooth gaps only over two positions is possible, what in 3 by directional arrows 52 and 54 is illustrated. As a result, the risk of assembly errors can be kept particularly low, since the correct installation of the serrations 18 and 20 both visually verifiable and measurable. In addition, a cross-toothing allows for unambiguous positioning and assembly, since a haptic feedback occurs when the teeth 50 threaded correctly.

Preferably, the teeth 50 not as to the middle, that is to the axis of rotation 24 Tapered teeth formed with constantly changing tooth geometry and tooth height, and achieved by bracing Traganteilserhöhung is not provided, but the teeth 50 are designed as parallel teeth, which are at least substantially uniform in shape and height. It can be provided that the teeth 50 are formed slightly spherical, that is, have a crown, thereby any misalignment of the respective tooth 50 and the entire joint housing 12 to be able to compensate. By such a crown of the teeth 50 or their tooth shape and the respective Zahnfußbelastung be kept low. In 6 is by lines 56 illustrates that the teeth 50 Trapezoidal with a small tooth angle and / or may be rectangular in order to keep axial forces low. Preferably, it is provided that a respective tooth shape of the teeth 50 is always rectangular in the tooth surface. As a result, a particularly high degree of coverage can be represented with only a small number of teeth. In the case of the trapezoidal configuration of the tooth form, it is possible, for example, to realize emergency running properties by means of a self-locking frictional tooth system in the case of tightening screw failure. Furthermore, advantages in the assembly can be realized by frictional engagement.

Out 7 is particularly well recognizable that in the circumferential direction between the respective groups of teeth 48 at least one plateau each 58 is arranged, which is used as a Anlageplateau and consequently a contact surface 60 which is at least substantially perpendicular to the axis of rotation 24 extends. When installing the serrations 18 and 20 come the plateaus 58 and thus the contact surfaces 60 the spur toothing 18 in support system with the plateaus 58 and thus the contact surfaces 60 the spur toothing 20 so that a clear positioning can be created. In addition, this can be the setting behavior of a tightening screw or a screw torque such as the mother 38 for axially holding the inner ring 16 on the joint housing 12 be kept particularly low. In other words, in the face gears 18 and 20 not about a spring effect provided by bracing, but there are end stops by the four plateaus 58 provided so that thereby a defined torque can be displayed.

The plateaus 58 can also be used as an initial stop in machining, ie when producing the respective spur toothing 18 and 20 be used. In addition, a center axis recording on the respective cross toothing can be displayed. Because the teeth 50 are straight and not in the direction of the axis of rotation 24 fall off or yourself rejuvenate, are the teeth 50 can be measured uniformly in at least two planes, with a Hirth gearing a surface measurement in space is required. In addition, the pitch and the shape profile are easier to measure and pitch errors have less impact than the Hirth. In addition, let the teeth 50 made particularly stable, which leads to a stable tool in the forming and thus to an increased service life. In addition, a centering center can be realized without deterioration from the Hirth serration.

The serrations 18 and 20 are preferably by forging, in particular by hot forging or semi-hot forging, and by machining the components, that is, the inner ring 16 and the joint housing 12 , manufactured so that a needs-based and simple production can be realized. Furthermore, this different cross-toothing options can be produced. Furthermore, a cold forming and / or broaching the respective contour by 90 degrees is conceivable, both in the joint housing 12 as well as the inner ring 16 , which can be a particularly advantageous tooth engagement in the cleared part, particularly low pitch errors and a high dimensional accuracy when clearing can be realized. The pin 26 is preferably designed as a flow-forming part, in particular for a hollow shaft, so that particularly high strengths of more than 900 megapascals can be realized. At the same time, the pin can 26 , Especially if it is at least partially hollow, be designed in lightweight construction.

LIST OF REFERENCE NUMBERS

10

Wheel flange joint housing arrangement

12

joint housing

14

wheel flange

16

inner ring

18

spur gearing

20

spur gearing

22

interface

24

axis of rotation

26

spigot

28

career

30

career

32

Bullet

34

Bullet

35

Anschraubsegment

36

flanging

38

mother

40

inner thread

42

end

44

external thread

46

splines

48

dental group

50

teeth

52

arrow

54

arrow

56

line

58

plateau

60

contact surface

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 102005054283 A1 [0002]

Claims (8)

Wheel flange joint housing arrangement ( 10 ) for a side shaft for transmitting torque between a differential and a wheel of a vehicle, with a joint housing ( 12 ) for a constant velocity joint and with a wheel flange ( 14 ), to which the wheel can be fastened, characterized in that the wheel flange ( 14 ) on a separate from the wheel flange ( 14 ) and separately from the joint housing ( 12 ) formed inner ring ( 16 ) is arranged, the first spur toothing ( 18 ) in engagement with a corresponding second spur toothing ( 20 ) of the joint housing ( 12 ) stands. Wheel flange joint housing arrangement ( 10 ) according to claim 1, characterized in that the respective spur toothing ( 18 . 20 ) is designed as a cross-toothing. Wheel flange joint housing arrangement ( 10 ) according to one of claims 1 or 2, characterized in that the inner ring ( 16 ) on one of the joint housing ( 12 ) provided pins ( 26 ) is arranged. Wheel flange joint housing arrangement ( 10 ) according to claim 3, characterized in that the pin ( 26 ) in one piece with the joint housing ( 12 ) is formed or separately from the joint housing ( 12 ) is formed and connected to this, in particular reversibly detachable, connected, in particular screwed, is. Wheel flange joint housing arrangement ( 10 ) according to one of the preceding claims, characterized in that the wheel flange ( 14 ) and the inner ring ( 26 ) at least one career ( 28 . 30 ) for respective rolling elements, in particular balls ( 32 . 34 ), via which the wheel flange joint housing arrangement ( 10 ) Is to be stored rotatably on a steering knuckle. Wheel flange joint housing arrangement ( 10 ) according to one of the preceding claims, characterized in that the wheel flange ( 14 ) and the inner ring ( 16 ) by means of a flange ( 36 ), in particular of the inner ring ( 16 ) are interconnected. Wheel flange joint housing arrangement ( 10 ) according to one of the preceding claims, characterized in that the wheel flange ( 14 ) and the inner ring ( 16 ) are connected to each other by means of at least one screw. Wheel flange joint housing arrangement ( 10 ) according to one of the preceding claims, characterized in that the wheel flange ( 14 ) and the inner ring ( 16 ) by means of a spline ( 46 ) are coupled together.

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