Hybrid vehicle wheel

Abstract

A hybrid vehicle wheel, comprising a wheel disc 12 produced as a cast part made of light metal and a rim ring 11 made of steel, wherein, in the assembled state, the rim ring is connected to the wheel disc by at least one adhesive connection 25 and / or at least one pressure zone 26 produced by thermal shrinkage or plastic deformation of the rim ring. In order to create a hybrid vehicle wheel which ensures a sufficient power flow between ring and disc reliably counteracting the circumferential forces resulting from braking and acceleration torques, the wheel disc 12 is additionally connected to the rim ring 11 via at least one steel rivet 27, inserted into a receiving hole 29 accessible from the outer front surface of the wheel disc, and either being welded with a rivet end face 30 to the radial inner side 24 of the rim ring 11 or being designed as a steel screw rivet and screwed into a nut that is welded to the radial inner side of the rim ring.

Description

[0001] Applicant : Maxion Wheels Holding GmbH , Ladestrasse , DE -53639 Kdnigswinter

[0002] Titel : Hybrid Vehicle Wheel

[0003] The invention relates to a hybrid vehicle wheel , comprising of a wheel disc produced as a cast part made of light metal and a rim ring made of steel having an inner rim flange , an outer rim flange , a rim well base , an inner well base flank, an inner rim shoulder, an outer well base flank, an outer rim shoulder and a transition section between the outer rim shoulder and the outer rim flange , wherein the wheel disc has an outer front surface and a disc rim running concentrically around the wheel axle , which disc rim has a contour adapted to the course of the outer rim flange , outer rim shoulder, transition section and outer well base flank on an inner side of the disc, wherein, in the assembled state , the rim ring is connected to the wheel disc by at least one adhesive connection and / or at least one pressure zone produced by thermal shrinkage or plastic deformation of the rim ring .

[0004] Conventional vehicle wheels usually consist of two main components , namely an inner wheel disc or disc and an outer rim ring . Generally, the entire wheel , that is , the rim and the disc , is manufactured of the same or a similar material . In the case of steel wheels , the rim and the disc are made of steel , although they can consist of different types of steel with different mechanical properties and chemical compositions . In the case of light alloy wheels , the same material is usually used, which is cast into a one-piece wheel .

[0005] Many advantages can be achieved through the casting process . One of the main advantages consists in that it is possible to manufacture the wheels with a complex , aesthetically pleasing shape that makes the wheel attractive and thus increases the saleability of vehicles . Due to the flexibility regarding design and shape , when using the casting process , a wheel can have a larger ventilation space , which contributes to better cooling of the brake callipers and other parts of the wheel assembly . This increases the service life of these parts and reduces their maintenance requirements .

[0006] In steel wheels , the disc part of the wheel is made by standard manufacturing processes such as forming , punching , stamping , etc . A wheel whose wheel disc is manufactured of steel has some inherent advantages such as a simpler, faster and cheaper manufacturing process , but there are limitations in the flexibility of the design and shape of the disc . In addition, wheels with a steel wheel disc generally perform worse in terms of brake ventilation and the like compared to light alloy wheels . If ventilation is to be improved by enlarging the ventilation holes , there is a ris k of weakening the wheel construction . In order to avoid weakening , the wheel disc must be designed in such a way that the strength of the wheel is not impaired . This can be achieved through larger material crosssections and correspondingly a higher wheel weight and / or a steel grade of higher strength must be used . In addition, the design / manuf acturing process becomes more complex . All this leads to higher weight and higher costs .

[0007] Hybrid wheels for vehicles are already known, which can be used for passenger cars , commercial vehicles and utility vehicles . In such wheels , which are usually two-piece wheels , the rim ring generally consists of steel , while the wheel disc or disc consists of a material other than steel , for example aluminium, magnesium or another non-ferrous material . The rim ring consisting of steel is manufactured using standard manufacturing processes such as rounding, butt welding, forming , etc . , while the disc part of the wheel is manufactured by casting . The two parts made of different materials can be j oined using various j oining processes . Adhesive processes , thermal shrinking and / or plastic forming of the rim ring can thereby be used, so that in the assembled state the rim ring is connected to the wheel disc by at least one adhesive j oint and / or at least one pressure zone created by thermal shrinking or plastic forming of the rim ring .

[0008] In DE 698 15 693 T2 , it has been proposed to bond the wheel disc and the wheel rim together by a pressing and forming process in which, after heating the rim, it is first mounted on the disc until it lies in the desired position with a rim part over a circumferential groove of the disc, wherein a section of the rim lying over the circumferential groove is then partially rolled into the groove . The rolling-in means an additional process step which requires a relative rotation between the rolling-in tool and the wheel , wherein the rolling-in depth of the rim part rolled into the circumferential groove is not constant over the entire circumference due to the changing temperature conditions , which is detrimental to the wheel strength .

[0009] From WO 2008 / 061703 Al is known a hybrid vehicle wheel , in which the wheel disc has a contour adapted to the shape of the wheel rim at the disc rim in such a way that , when the wheel disc and wheel rim are mounted, a pressure zone can be created on the well base flank on the one hand and on the outer rim flange on the other hand, in order to create a seal between the wheel disc and wheel rim . For this , the wheel rim is clamped to the outer rim flange by compressing and / or rolling it onto the disc rim .

[0010] It has been shown that the known connection methods for the parts of hybrid wheels consisting of different materials lead to connections that cannot always withstand heavy loads , for example cornering and radial forces , during operation, or that sufficiently stable connections can often only be achieved with increased material thicknesses and / or high-strength materials , which increases the cost of the wheel and / or its weight .

[0011] It is the obj ect of the invention is to create a hybrid vehicle wheel which can be produced at low cost and avoids the disadvantages mentioned and which, in particular, ensures a sufficient power flow between the rim ring and wheel disc which reliably counteracts the high circumferential forces resulting from the braking and acceleration torques occurring during operation of the vehicle wheel .

[0012] This obj ect is solved by the invention in that the wheel disc is additionally connected to the rim ring via at least one steel rivet , which is inserted as a steel weld rivet into a receiving hole which is accessible from the outer front surface of the wheel disc, and is welded with a rivet end face to the radial inner side of the rim ring or is designed as a steel screw rivet with an external thread and is screwed into a nut which is welded to the radial inner side of the rim ring as an anchoring element for the steel screw rivet .

[0013] The use of at least one steel rivet , which is provided as a connecting means in addition to the adhesive connection and / or shrinking or plastic forming, creates a rigid and secure connection between the wheel disc and the rim ring , which are manufactured of different materials . A wheel can thus be provided whose main components consist of different materials , namely the wheel disc, for example , of a cast light metal material and the rim ring of a suitable sheet steel , wherein the material thicknesses realized in the wheel parts no longer have to be ( co- ) determined by the strength of the connection between the two parts , as in the prior art , as the additional rivet ( s ) provided according to the invention considerably improve ( s ) the strength of this very connection and result ( s ) in an excellent power flow between the rim ring and the wheel disc .

[0014] "Steel rivet" in the sense of the invention thereby means a fastening bolt which, in the assembled state , can be subj ected in particular to tensile force and possibly also to shear force , which, in the assembled state , effects a contact pressure force acting in contact regions between the wheel disc and the rim ring and thus an increased pressure and which, in addition, in a preferred design can also be capable of preventing movements between the two wheel parts in the circumferential direction . According to a first embodiment , such a steel rivet can be designed as a weld rivet , which is preferably welded to the inside of the rim ring with its rivet end face in a spot welding process . According to another embodiment , a nut is welded to the rim ring at the corresponding position for the connection of the fastening bolt , and the bolt , which is provided as a steel screw rivet with an external thread, is screwed into the nut through the receiving hole and tightened with a desired torque at which the desired surface pressure between the rim ring and wheel disc is achieved in the region around the receiving hole . A particular advantage of the constructions in which the steel rivet is mounted from the outside through the receiving hole on the disc part and firmly connected to the rim part without extending through the rim ring is the prevention of leaks in the region of the rim. There is then no through-hole in the rim. This is an important feature and has the decisive advantage that the connection is airtight . The invention offers the advantage that the rim consists of a ferrous material ( steel ) , particularly in the region of the outer rim flange or the rim flange , which material can withstand an impact load relatively well compared to a non-ferrous material . By means of this design, the advantages of steel and cast iron are preserved in a wheel , while at the same time high torsional rigidity is provided in the j oint region due to the riveting , which also functions very effectively when the vehicle is accelerated or braked heavily while driving .

[0015] In an advantageous further development of the invention, the receiving hole can be designed as a stepped bore , wherein the steel rivet can a head part and a bolt part with a smaller diameter than the head part and the head part is preferably spaced apart from the inner wall of the stepped bore in the assembled state . With such a design, an aesthetically pleasing design can be achieved in which the head part of the steel rivet is at least substantially completely received in the stepped bore and thus does not protrude beyond the rim surrounding the receiving hole .

[0016] It is also advantageously possible for the wheel disc to be provided with window recesses as ventilation holes , wherein the wheel disc is provided in the region of at least one window recess with one of the receiving holes for the steel rivet as a mechanical securing element , wherein the receiving hole preferably runs obliquely to the wheel axle and / or opens into the contour section against which the rim ring rests with the outer well base flank in the assembled state .

[0017] If the outer rim flange of the rim ring is spaced from the contour section of the inner side of the disc facing it , it is advantageous if a preferably elastically deformable ring element is arranged between the outer rim flange and the contour section, forming an air gap between the transition section and the contour of the wheel disc on the inner side of the disc . The ring element can thereby at least partially have a thickness that is greater than the distance between an underside of the rim flange and a surface of the contour section of the disc rim on the inside of the disc . The arrangement can expediently be made in such a way that the ring element is mechanically pressed between the wheel disc and the rim ring, deforming its initial shape , with the initial shape preferably having a circular cross-section with a diameter that is greater than the distance between the underside of the rim flange and the surface of the contour section of the disc rim at the transition from the inside of the disc to the outer front surface of the wheel disc .

[0018] In an advantageous design of the invention, the ring element can have an asymmetrical initial shape in cross-section with a preferably circular head section and a web section formed integrally on the head section, wherein the head section is mechanically pressed in between the wheel disc and the rim ring with deformation of its initial shape and the web section partially proj ects with an end face over the outer front surface of the wheel disc in the assembled state of the ring element .

[0019] Alternatively, it is also possible for the ring element to have an asymmetrical initial shape in cross-section with a preferably circular head section, a web section and a lip section, wherein the head section is mechanically pressed in between the wheel disc and rim ring, deforming its initial shape , and the lip section partially rests on the outside of the outer front surface of the wheel disc or covers the outer front surface of the wheel disc in the assembled state of the ring element .

[0020] As a further alternative , it can be advantageous if the ring element has an asymmetrical initial shape in cross-section with a preferably circular head section, a web section and a lip section, wherein the head section is mechanically pressed in between the wheel disc and the rim ring with a deformation of its initial shape , the lip section covers the outer front surface of the wheel disc in the assembled state of the ring element and several retaining webs are formed on a rear side of the lip section, offset circumferentially, for interaction with anchor recesses in the front surface . The arrangement can conveniently be such that the wheel disc has several anchor recesses on an outer front surface near the rim of the disc, wherein the anchor recesses preferably open into the air gap between the transition section of the rim ring and the contour of the wheel disc and are open on the inside of the disc . In this embodiment , the retaining webs can be provided with retaining lugs at their free ends in an advantageous further development .

[0021] It has proved advantageous in the invention if the rear of the wheel disc is provided with a contact web extending the contour inwards for a partial section of the rim well base , wherein the axial length of the contact web is preferably greater than the sum of the rim sheet thickness in the rim well base and the maximum web thickness of the contact web . Thereby, the contact web can be anchored to the wheel disc on the rim well base of the rim ring by means of at least one weld seam, a weld rivet , an adhesive j oint or a mechanical securing element , in particular a connecting rivet , connecting pin or weld rivet .

[0022] Preferably, the rim ring is thermally shrunk onto the wheel disc in such a way that the rim ring forms at least a first pressure zone on the well base flank and a second pressure zone on the rim shoulder when mounted with the wheel disc on the inside of the disc . The temperature difference between the wheel disc and the rim part is preferably a maximum of 220 K before shrinking, wherein the wheel disc is preferably cooled to a minimum of -40 ° C and / or the rim part is heated to a maximum of +180 ° C . The differences in diameter between the rim part and the wheel disc at the parts producing the pressure zones between the rim part and the wheel disc in the assembled state are preferably a maximum of 0 . 5 % before shrinking .

[0023] In a particularly preferred embodiment of the vehicle wheel according to the invention, the rim ring has a hump as a tyre securing element between the outer well base flank and the outer rim shoulder, while the contour of the wheel disc has an elevation on the inner side of the disc in a contour section opposite the hump , wherein an air gap is formed between the underside of the hump and the surface of the elevation of the contour in the assembled state , wherein the air gap is preferably partially greater than 0 . 5 mm .

[0024] Further advantages and designs of a vehicle wheel according to the invention result from the following description of exemplary embodiments illustrated in the drawing in an exemplary manner . It shows :

[0025] FIG 1 a first embodiment of a hybrid vehicle wheel according to the invention in radial section, whereby for reasons of symmetry only one half of the wheel is shown, and only partially;

[0026] FIG 2 an enlarged representation of the connecting region between the wheel disc and the rim ring of the vehicle wheel according to FIGI ;

[0027] FIG 3 a detail of the wheel disc in the region of a receiving hole for a steel rivet ;

[0028] FIG 4 a second embodiment of the invention in a representation similar to FIG 2 ; and

[0029] FIG 5 a detail IV according to FIG 4 .

[0030] FIG 1 shows a hybrid vehicle wheel designated in its entirety with 10 , which essentially consists of a rim ring 11 made of steel and a wheel disc 12 made as a cast part of light metal . In a known manner , the rim ring 11 has an inner rim flange 13 , an outer rim flange 14 , a rim well base 15 with an outer well base flank 16 and an inner well base flank 17 , an outer rim shoulder 18 and an inner rim shoulder 19 as well as a transition section 20 between the outer rim shoulder 18 and the outer rim flange 14 . At the inner end of the outer rim shoulder 18 , this is provided with a hump 21 as a tire securing element directly at the transition to the outer well base flank 16 , as is known in particular for wheels with sloping shoulder rims . The rim ring 11 is manufactured in the conventional manner as for a steel disc wheel consisting entirely of steel from hot-rolled sheet steel in a rolling and / or deep-drawing process , as is known to the person skilled in the art .

[0031] The wheel disc 12 is cast from an aluminium alloy or another suitable light metal material and can then be machined by turning . It has an outer front surface 22 and a disc rim 23 running concentrically around the wheel axle A, which rim has a contour which is adapted to the inner side 24 of the disc along the course of the outer rim flange 14 , outer rim shoulder 18 , transition section 20 and outer well base flank 16 , so that the two wheel parts 11 , 12 in the assembly state shown lie tightly and / or positively against one another in this region . The arrangement is such that the rim ring 11 is connected to the wheel disc 12 in the assembled state by at least one adhesive j oint 25 and / or at least one pressure zone produced by thermal shrinkage or plastic deformation of the rim ring 11 , which is indicated at 26 in FIG 4 .

[0032] As can be seen from the drawing , the wheel disc 12 is additionally connected to the rim ring 11 by means of several steel rivets 27 , which in the example shown in FIG 1 and 2 are arranged evenly distributed over the circumference of the vehicle wheel 10 on a pitch circle sweeping over the outer well base flank 16 . The number of steel rivets 27 is variable and depends on the size of the wheel and its design, in particular also on ventilation openings 28 arranged in the wheel disc 12 . In the example shown in FIG 1 to 3 , the steel rivets 27 are respectively designed as a welded steel rivet , each of which is inserted into a receiving hole 29 , which is provided on the wheel disc 12 in its disc rim 23 in such a manner that it opens opposite the outer well base flank 16 . The respective rivet 27 is inserted into the receiving hole 29 from the outside of the disc rim and spot-welded with a front rivet end face 30 to the radial inner side of the rim ring 11 in the region of its outer well base flank 16 . The receiving hole 29 is designed as a stepped bore as shown, with a front section 29v of smaller diameter facing the well base flank, which is adapted to the diameter of a front bolt part 27v of the weld rivet 27 , and with a rear section 29h of larger diameter, which is slightly larger than the diameter of the rivet head part 31 , which is formed at the rear end of the weld rivet 27 and which is completely received in the receiving hole 29 in its rear section 29h . The head part 31 is spaced from the inner wall of the stepped hole in the assembled state , so that a riveting tool ( not shown) inserted into the hole 29h can be applied to the head in an unimpeded manner .

[0033] In the embodiment example shown in FIG 4 and FIG 5 , the additional connecting or securing means provided according to the invention between the disc 12 and the wheel rim 11 are designed as steel screw rivets 270 with an external thread 271 . There are two groups of rivets here , which run on two axially spaced-apart pitch circles in the region of the outer rim shoulder 18 on the one hand and in the region of the rim well base 15 on the other hand . Similar to the first embodiment example , the steel screw rivets 270 are mounted from the outside of the wheel disc 12 . The screw rivets located in the region of the outer rim shoulder are thereby inserted into stepped receiving holes 290 , so that their screw head 310 , which is larger than the front threaded end 271 , is completely accommodated in the outer section of the respective receiving hole 290 . The threaded ends 271 of the screw rivets 270 are screwed into screw nuts 320 , which are welded as anchoring elements to the radial inner side of the rim ring 11 , namely the underside of the outer rim shoulder 18 and the rim well base 15 , as can be seen in the detailed illustration in FIG 5 . To accommodate the nut 320 , which has only a small height , the rim ring can be provided with a shoulder-like recess adapted to the cross-section of the nuts on its inner side and / or the wheel disc in the rim region surrounding the receiving hole 290 on the outer rim of the disc , with which it lies tightly against the rim ring .

[0034] As can be clearly seen in the drawing , the wheel disc 12 is provided with window recesses forming the ventilation holes 28 , wherein the wheel disc 12 is provided respectively with one of the receiving holes for one of the steel rivets 27 as a mechanical securing element in the region of the window recesses . In the first embodiment example according to FIG 1 to 3 , the receiving holes 29 formed there in the wheel disc 12 in the region of the ventilation holes 28 run at an acute angle obliquely to the wheel axle A. In the second embodiment example according to FIG 4 , the receiving holes 290 opening out at the rim well base 15 are radially aligned, while the holes for the screw rivets 270 located on the outer pitch circle in the region of the outer rim shoulder 18 are aligned at an obtuse angle to the wheel axle A .

[0035] In the embodiment example shown in FIG 4 and FIG 5 , a further advantageous further development of the vehicle wheel according to the invention can be seen, which relates to the design of the wheel on its outer side in the region of the outer rim flange 14 . It can be seen that the outer rim flange 14 , together with the outer transition section 20 , is spaced apart from corresponding parts 35 , 38 of the contour on the disc rim 32 . Between the outer rim shoulder 18 and the outer transition section 20 , a transition arc of the rim ring 11 is also spaced from the corresponding contour section 35 on the disc rim 23 . A free space 120 is created hereby, which, depending on the steel used, allows the outer rim flange 14 of the rim ring 11 to move as far as possible even elastically, should the outer rim flange 14 come into contact with a kerb or an obj ect lying on the road, for example , due to careless driving . According to the invention, this free space 120 is in turn used to mount a ring element 125 between the outer rim flange 14 and the contour section 38 opposite thereto on the wheel disc 12 . The ring element 125 is arranged concentrically along the disc rim and can consist of a closed ring , but also of several ring sections . The ring element 125 is mounted in such a way that its initial shape is mechanically changed in order to clamp the ring element 125 between the underside of the rim ring 11 in the region of the outer rim flange 14 and the corresponding part on the contour section 38 . The ring element 125 preferably consists of an elastically deformable material , such as an elastomer, which has a circular cross-section in the initial state , which is deformed into an oval cross-section, as shown, when it is mounted in the free space 120 . Between the contour section 38 directly opposite the outer rim flange 14 at the transition into the outer front surface 22 of the wheel disc 12 and the contour section 35 on the disc rim 23 , which is opposite the transition section 20 on the rim ring 11 , a trough section can be formed, which forms an arcuate depression and is thereby on the one hand particularly favourably adapted to the deformed cross-section of the oval deformed ring element 125 , but at the same time also securely positions the ring element 125 at a predetermined position . Accordingly, the outer circumference of the circumferential ring element 125 rests on the contour of the disc rim on the one hand and on the underside of a transition arc between the transition section 20 and the outer rim flange 14 on the other hand . Although the entry gap indicated by the arrow S , the size of which essentially corresponds to the clear width between the contour section 38 and the underside of the outer rim flange 14 at its outer end, is open, the free space 120 is nevertheless essentially sealed by means of the ring element 125 . As can be clearly seen from FIG 4 , the ring element 125 has , at least in part , a thickness which is greater than the gap distance S between the underside of the rim flange 14 and the surface of the contour section 38 of the disc rim 23 on the inner side 24 of the disc . The main function of the ring element 125 is to form a damping element or to assume a damping function should a force act on the outer rim flange 14 of the rim ring 11 forming the wheel rim .

Claims

Cl aims :

1. A hybrid vehicle wheel, comprising a wheel disc (12) produced as a cast part made of light metal and a rim ring(11) made of steel having an inner rim flange (13) , an outer rim flange (14) , a rim well base (15) , an inner well base flank (17) , an inner rim shoulder (19) , an outer well base flank (16) , an outer rim shoulder (18) and a transition section (20) between the outer rim shoulder (18) and the outer rim flange (14) , wherein the wheel disc (12) has an outer front surface (22) and a disc rim (23) running concentrically around the wheel axle, which disc rim has a contour adapted to the course of the outer rim flange, outer rim shoulder, transition section and outer well base flank (16) on an inner side (24) of the disc, wherein, in the assembled state, the rim ring is connected to the wheel disc by at least one adhesive connection (25) and / or at least one pressure zone (26) produced by thermal shrinkage or plastic deformation of the rim ring, characterized in that the wheel disc (12) is additionally connected to the rim ring (11) via at least one steel rivet (27; 270) , which is inserted as a steel weld rivet (27) into a receiving hole (29) which is accessible from the outer front surface of the wheel disc(12) , and is welded with a rivet end face (30) to the radial inner side (24) of the rim ring (11) or is designed as a steel screw rivet (270) with an external thread (271) and is screwed into a nut (320) which is welded to the radial inner side of the rim ring as an anchoring element for the steel screw rivet.

2. The vehicle wheel according to claim 1, characterized in that the receiving hole (29) is designed as a stepped bore and the steel rivet (27) has a head part (31) and a bolt part (27v) with a smaller diameter than the head part, wherein the head part is preferably spaced apart from the inner wall of the stepped bore (29) in the assembled state.3 . The vehicle wheel according to claim 1 or 2 , characterized in that the wheel disc ( 12 ) is provided with window recesses ( 28 ) as ventilation holes , wherein the wheel disc is provided in the region of at least one window recess ( 28 ) with one of the receiving holes ( 29 ) for the steel rivet ( 27 ; 270 ) as a mechanical securing element , wherein the receiving hole preferably extends obliquely to the wheel axle (A) and / or opens into the contour section against which the rim ring rests with the outer well base flank ( 16 ) in the assembled state .4 . The vehicle wheel according to one of claims 1 to 3 , characterized in that the outer rim flange ( 14 ) of the rim ring is spaced apart from the contour section ( 38 ) of the inner side of the disc facing the rim ring, and a preferably elastically deformable ring element ( 125 ) is arranged between the outer rim flange and the contour section, forming an air gap space ( 120 ) between the transition section and the contour of the wheel disc on the inner side of the disc .5 . The vehicle wheel according to claim 4 , characterized in that the ring element has at least partially a thickness which is greater than the distance between an underside of the rim flange and a surface of the contour section of the disc rim on the inner side of the disc .6 . The vehicle wheel according to claim 5 , characterized in that the ring element is mechanically pressed in between the wheel disc and the rim ring , wherein the initial shape preferably has a circular shape in cross-section with a diameter which is greater than the distance between the underside of the rim flange and the surface of the contour section of the disc rim at the transition of the inner side of the disc into the outer front surface of the wheel disc .

7. The vehicle wheel according to one of claims 1 to 6, characterized in that the wheel disc is provided with a contact web extending the contour inwards for a partial section of the rim well base at the rear, wherein the axial length of the contact web is preferably greater than the sum of the rim sheet thickness in the rim well base and the maximum web thickness of the contact web.

8. The vehicle wheel according to claim 7, characterized in that the contact web is anchored to the wheel disc on the rim well base of the rim ring by means of at least one weld seam, a weld rivet, an adhesive joint or a mechanical securing element, in particular a connecting rivet, connecting pin or weld rivet.

9. The vehicle wheel according to one of the preceding claims, characterized in that the rim ring (11) is thermally shrunk onto the wheel disc (12) in such a way that, when assembled, the rim ring forms at least one first pressure zone (26) with the wheel disc on its inner side (24) on the well base flank (16) and / or on the rim shoulder (18) .

10. The vehicle wheel according to claim 9, characterized in that the temperature difference between the wheel disc and the rim part is a maximum of 220 K before shrinking, wherein the wheel disc is preferably cooled to a minimum of -40 °C and / or the rim part is heated to a maximum of +180 °C.

11. The vehicle wheel according to claim 9 or 10, characterized in that the differences in diameter of the rim part and the wheel disc at the parts producing the pressure zone between the rim part and wheel disc in the assembled state are a maximum of 0.5% before shrink-fitting.

12. The vehicle wheel according to one of the preceding claims, characterized in that the rim part has a hump between the outer well base flank and the outer rim shoulder as a friction-locking element, and that the contour of the wheeldisc has an elevation on the inside of the disc in a contour section opposite the hump , wherein an air gap is formed in the assembled state between the underside of the hump and the surface of the elevation of the contour section, wherein the air gap is preferably partially greater than 0 . 5 mm .

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