Adjustable wheel for automobile

Abstract

The invention relates to a variable-angle wheel (18) for a motor vehicle. The wheel (18) comprises: a rotational axis (20); a rim (22) about the rotational axis and intended to receive a tire; a ring (26) between the rotational axis (20) and the rim; and an axial position adjustment device (36) for the ring relative to the rim between at least a first position and a second position. The adjustment device (36) further comprises axial stop means (44) with an adjustment body (46) movable between the ring (26) and the rim; said adjustment body (46) being configured to abut between at least one of the ring and the rim in order to axially lock the ring (26) relative to the rim in the first and second positions. Figure to be published with the abbreviation: Figure 2

Description

Title of the invention: Adjustable wheel for motor vehicle

[0001] The invention relates to the field of ground connections of a motor vehicle. The invention relates to the axial adjustment of a motor vehicle wheel. More specifically, the invention relates to a motor vehicle wheel with an axially adjustable rim and crown. The invention also relates to a motor vehicle.

[0002] The grip of a motor vehicle depends on its tires, which are mounted around the wheels. Typically, a wheel has a cylindrical rim surrounding an inner ring that is perpendicular to the axis of rotation. The ring is generally attached to a hub, similar to a steering knuckle. The wheel defines an internal housing in which a braking system is arranged, such as a disc coupled to a brake caliper. Thus, the compactness of the wheel allows for larger components to be accommodated. In addition to braking torque, a wheel is capable of transmitting engine torque during the acceleration phases of the motor vehicle. Reducing the wheel's rotational inertia optimizes these acceleration phases.

[0003] Each wheel constitutes an unsprung mass. When this mass increases, comfort is negatively impacted, as is vehicle handling. Indeed, increasing this mass increases the inertia of the suspension system, thus compromising contact between the tire and the road, particularly during suspension rebound. Furthermore, wheel rigidity optimizes tire stability within a predefined geometry despite lateral forces. Thus, the wheel contributes both directly and indirectly to safety. The choice of wheel materials allows for a certain compromise to be achieved between the various constraints.

[0004] The same wheel is mass-produced since it is fitted to different models of motor vehicles. It is generally available in different versions, with different distances between its central plane and the mounting surface of the crown.

[0005] Document GB563508A describes a wheel for a motor vehicle. The wheel has a rim, a disc, and a device for axially adjusting the disc relative to the rim. Axial adjustment is achieved via a sliding system with oblong holes and fixing screws in the oblong holes. The adjustment operation is not very precise because the disc can tilt relative to the equatorial plane. This generates vibrations while driving. During axial movement of the disc for adjustment, it risks becoming stuck in the rim. Furthermore, in use, the shocks Vibrations can loosen one of the fixing screws, causing the wheel to become misaligned. This misalignment can result in the wheel being out of true.

[0006] The invention aims to address at least one of the problems or drawbacks encountered in the prior art. In particular, the invention aims to improve the retention of an adjustable crown within a wheel rim of a motor vehicle. The invention also aims to optimize retention, adjustment accuracy, safety, and economies of scale specific to a motor vehicle wheel.

[0007] According to a first aspect, the invention provides a wheel for a motor vehicle; the wheel comprising: an axis of rotation; a rim around the axis of rotation and intended to receive a tire; a ring between the axis of rotation and the rim; a device for adjusting the axial position of the ring relative to the rim between at least a first position and a second position; remarkable in that the adjustment device further comprises axial stop means with a movable adjustment body between the ring and the rim; said adjustment body being configured to stop between at least one of the ring and the rim in order to axially lock the ring relative to the rim in the first and second positions.

[0008] Thanks to the adjustment body, the position of the crown is secured by an additional element. This element complements the action of the fixing screws. The crown remains securely in place despite the presence of the adjustment device.

[0009] Preferably, the rim comprises an inner surface with a plurality of axially distributed annular grooves; the crown comprising an annular rib configured to extend into one of said annular grooves.

[0010] Preferably, the adjusting body is rotationally movable.

[0011] Preferably, the adjusting body is a first adjusting body, the means axial stop further comprising second adjusting bodies; the first adjusting body and the second adjusting bodies being distributed angularly around the axis of rotation.

[0012] Preferably, the axis of rotation is a main axis of rotation; the adjusting body is movable in rotation about an auxiliary axis of rotation parallel to the main axis of rotation.

[0013] Preferably, the rim includes an annular overthickness, the adjustment body being axially at the level of said annular overthickness.

[0014] Preferably, the adjusting body is a helical body, at least one of the crown and rim comprising a toothed section cooperating with the helical body.

[0015] Preferably, the crown comprises a tubular bearing against the rim, the toothed section projecting axially from said tubular bearing.

[0016] Preferably, the adjustment body is integral with the rim.

[0017] Preferably, the rim includes a radial cavity open towards the axis of rotation, the adjusting body being in said radial cavity.

[0018] Preferably, the adjustment device comprises a plurality of fixing screws; the adjustment body being angularly offset with respect to each of the fixing screws.

[0019] Preferably, the adjustment device includes axial grooves through which the fixing screws pass; the adjustment body being axially at the level of the axial grooves; more preferably, at least in the first or second position.

[0020] Preferably, the crown comprises a metal sheet.

[0021] Preferably, the rim includes an inflation valve orifice axially opposite the moving body.

[0022] Preferably, at least one of the crown and rim comprises a first toothed section, and a second toothed section with teeth oriented towards the first toothed section.

[0023] Preferably, the fixing screws are fixed in the annular overthickness.

[0024] Preferably, the adjusting body is a rotating body.

[0025] According to another aspect, the invention relates to a motor vehicle wheel; the wheel comprising: a rotational axis; a rim around the rotational axis and intended to receive a tire; a ring between the rotational axis and the rim; a device for adjusting the axial position of the ring relative to the rim between at least a first and a second position; notable in that the rim comprises an inner surface with a plurality of axially distributed annular grooves; the ring comprising an annular rib configured to extend into one of said annular grooves. This aspect allows the ring to be axially held in the rim, and in a precise position. Furthermore, this aspect allows the parallelism between the ring and the equatorial plane to be controlled.

[0026] According to another aspect, the invention relates to a motor vehicle wheel; the wheel comprising: a rotational axis; a rim about the rotational axis and intended to receive a tire; a ring between the rotational axis and the rim; a device for adjusting the axial position of the ring relative to the rim between at least a first position and a second position; remarkable in that the adjustment device comprises a rotating body between the ring and the rim, the rotating body being free to rotate between a first angular position and a second angular position in order to lock the ring relative to the rim in the first and second positions. The rotating body forms a intermediate spacer between the crown and the rim which allows the position of the crown to be indexed.

[0027] According to another aspect, the invention proposes a motor vehicle comprising a wheel with a rim and a tire mounted around said rim; remarkable in that the wheel conforms to the invention.

[0028] Preferably, the wheel includes an inflation valve axially opposite the adjustment body.

[0029] Each feature introduced by the expression "preferably" given in relation to one of the aspects of the invention applies to all other aspects of the invention.

[0030] The invention will be well understood and other aspects and advantages will become clear upon reading the following description, given with reference to the attached figures listed below.

[0031] Fig. 1 is a side view of a motor vehicle according to the invention.

[0032] Fig. 2 shows the inside of a motor vehicle wheel according to a first embodiment of the invention.

[0033] The [Fig.3] is an enlargement of means for axial stop of a wheel of motor vehicle according to the first embodiment of the invention.

[0034] Fig. 4 is a cross-section of a rim of a wheel of a motor vehicle according to the invention.

[0035] The [Fig.5] is a cross-section at the radial interface between a rim and a crown of a wheel of a motor vehicle according to the invention.

[0036] Fig. 6 is a cross-section of a motor vehicle wheel according to a second embodiment of the invention.

[0037] In the following description, the term "include" is synonymous with "include" and is not limiting in that it permits the presence of other elements in the motor vehicle or wheel to which it relates. It is understood that the term "include" includes the terms "consist of".

[0038] In this description, the terms "transverse" and "transversely" are used with respect to the vehicle's frame of reference in the mounting configuration. The term "longitudinal" refers to the vehicle's principal direction of travel. The term "transverse" refers to a direction perpendicular to the vehicle's principal direction of travel. The term "front" refers to the vehicle's principal direction of travel. The term "rear" refers to the opposite of the front of the vehicle.

[0039] The terms "radial" and "radially" refer to a direction perpendicular to the axis of rotation of the wheel. It is understood that the track length of an axle corresponds to the width between the tires of said axle.

[0040] The X-axis represents the longitudinal direction, the Y-axis represents the transverse direction, and the Z-axis represents the vertical direction of the motor vehicle. These three axes define a right-handed trihedron.

[0041] In this description, the terms "parallel" and "perpendicular" are not to be understood in the strict sense of the term. Indeed, they allow an inclination of at most 20°, preferably at most 10°, more preferably at most 5°, and even more preferably at most 2°; with respect to the strict meaning of these terms.

[0042] In this description, the technical characteristics are defined in the wheel mounting configuration, unless otherwise explicitly stated.

[0043] Throughout the description, the different figures use the same reference signs to designate identical or similar entities.

[0044] Figure 1 represents a motor vehicle 10, according to an embodiment of the invention. The motor vehicle 10 comprises energy storage means and at least one motor (not shown) adapted to drive said motor vehicle 10.

[0045] The motor vehicle 10 comprises a structure 12. The structure 12 forms an outer body, or the main frame of the motor vehicle. The structure 12 delineates different compartments of the motor vehicle 10, including the passenger compartment, the cargo area, and the engine compartment (not shown). The structure 12 may be formed from an assembly of stamped and welded sheet metal parts.

[0046] The structure 12 connects various parts of the motor vehicle 10, including the openings. The structure 12 forms a mounting support for the powertrain, suspension systems, steering system, and braking systems.

[0047] The motor vehicle 10 comprises ground connections 14, in this case four ground connections 14. Each ground connection 14 comprises a tire 16 associated with a wheel 18. When the tire 16 is mounted around the wheel 18, they define an annular chamber (not shown). The annular chamber is hollow and sealed. The annular chamber is inflated to a given pressure to adjust the contact area with the ground. The tire 16 comprises a tubular tread and a sidewall on each side of the tread. The sidewalls form annular surfaces around the axis of rotation 20. The sidewalls are in contact with the wheel 18. They extend radially.

[0048] Each wheel 18 is mounted to rotate freely about an axis of rotation 20 relative to the structure 12. Each axis of rotation 20 is generally transverse. It can be substantially inclined in order to adjust comfort, stability, and driving precision.

[0049] The motor vehicle can, for example, be a private motor vehicle or a commercial motor vehicle.

[0050] Figure 2 shows a side view of half a wheel 18 of a motor vehicle. The motor vehicle corresponds to the one shown in relation to Figure 1. The view is from inside the motor vehicle.

[0051] The wheel 18 has a rotation axis 20, which forms a central axis of symmetry. The wheel 18 comprises a circular rim 22. The rim 22 is radially external. It forms a ring around the rotation axis 20. The rim 22 forms the circular portion at the periphery of the wheel 18. It is rotationally balanced. At each axial end, the rim 22 includes a tire sidewall retaining flange 24.

[0052] The wheel 18 further includes a ring 26. The ring 26 forms a physical connecting veil inside the rim 22. It extends radially towards the axis of rotation 20. The ring 26 is an internal ring. The ring 26 partially closes, or bars, the inside of the rim 22. The ring 26 generally forms a disc. It can be solid or perforated for lightness. In this case, the ring 26 includes an annular row of perforations distributed around the axis of rotation 20. The perforations facilitate the cooling of a braking system housed in the wheel 18.

[0053] The wheel 26 includes a central opening 28 and mounting holes 30 distributed around the central opening 28. The mounting holes 30 are configured for attaching the wheel to a hub of the motor vehicle. For example, the wheel 26 includes four to five mounting holes 30. The central opening 28 is adapted to ensure centering.

[0054] The rim 22 further includes an opening for an inflation valve 34 (shown in dotted lines). The inflation valve 34 is axially located on the outer side of the wheel 18.

[0055] The wheel 18 includes an adjustment device 36 for the axial position of the ring 26 relative to the rim 22 between at least a first and a second position. These positions are axial positions. They can be intermediate positions. The ring 26 is movable up to a third and a fourth position, which are beyond the first and second. In the present figure, in the first position, the rim 22 is positioned as far inward as possible relative to the ring 26.

[0056] The position of the crown 26 relative to the rim 22 is fixed by means of a plurality of fixing screws 38, which are generally fixing axes. The fixing screws 38 extend radially. They form an annular row. They are located on the same plane perpendicular to the axis of rotation 20.

[0057] The fixing screws 38 pass through axial grooves 40. The axial grooves 40 are formed on the ring 26. The axial grooves 40 pass radially through the ring 26. They form axial guides in which the fixing screws 38 translate. After tightening the fixing screws 38, the crown 26 is held in the rim 22.

[0058] The rim 22 includes an annular thickness 42. The fixing screws 38 are fixed in the annular thickness 42. The annular thickness 42 stiffens the rim 22 as a whole.

[0059] The adjustment device 36 further comprises axial stop means 44 with at least one movable adjustment body 46. The adjustment body 46 is movable in rotation or translation. The adjustment body 46 is arranged between the ring 26 and the rim 22. It allows their relative position to be fixed. In the present embodiment, four adjustment bodies 46 are provided. However, any other number may be selected.

[0060] The adjustment device 36 is axially opposite the inflation valve 34. This arrangement protects the adjustment device 36.

[0061] Each adjusting body forms an additional retaining element for the crown 26. This ensures a more secure position. This rigidity limits the mechanical stress on the fixing screws 38, preventing them from loosening or breaking. Furthermore, its presence allows for precise indexing in at least one axial direction. The vehicle's track geometry is better controlled. Consequently, the invention contributes to safety.

[0062] The adjusting body 46 is axially at the level of the axial grooves 40. They are axially at the same level in the first position and / or in the second position.

[0063] The adjusting body 46 is a first adjusting body, the axial stop means 44 further comprising second adjusting bodies; the first adjusting body and the second adjusting bodies are distributed angularly around the axis of rotation 20. The adjusting bodies 46 form an alternation with the fixing screws 38.

[0064] The ring 26 also includes a circumferential groove 48. The circumferential groove opens against the rim 22. It allows the reading of an axial position indication of the ring 26 in the rim 22.

[0065] Figure 3 shows a wheel adjustment device 36 for a motor vehicle, according to an embodiment of the invention. The motor vehicle may correspond to the one shown in relation to one of Figures 1 to 2.

[0066] The adjustment device 36 has axial stop means 44 adapted to lock the ring 26 in the rim 22 by forming an obstacle that stops the ring 26. The axial stop means 44 comprise at least one movable adjustment body 46, for example, a rotating one. The adjustment body 46 is at the interface between the ring 26 and the rim 22. In the following description, only one adjustment body 46 will be described. However, the following description applies to each adjustment body, unless otherwise specified.

[0067] The adjusting body 46 is configured to abut between at least one, preferably both, of the ring 26 and the rim 22, in order to axially lock the ring 26 relative to the rim 22 in both axial directions. The adjusting body 46 allows locking in the first and second positions, as well as in intermediate positions.

[0068] The wheel's rotation axis is a main rotation axis. The adjusting body 46 is rotatable about an auxiliary rotation axis 50 parallel to the main rotation axis. The auxiliary rotation axis 50 is axially oriented. It is aligned with the sliding direction of the ring 26. This arrangement optimizes the simplicity of the adjusting device 36.

[0069] According to an alternative of the invention, the auxiliary axis of rotation is inclined with respect to the main axis of rotation.

[0070] The adjusting body 46 is a helical body. It is connected at its ends to the rim 22. It comprises at least five turns. The ring 26 includes a toothed section 52 cooperating with the helical body. They form a screw mechanism without 54. The helical body allows the toothed section 52 to be axially locked. Its thread forms an axial stop surface. The toothed section 52 is longer than the helical body. It comprises more teeth than the number of turns. This feature optimizes the simplicity and the extent of the adjustment range of the adjusting device 36.

[0071] The helical body allows for precise adjustment of the axial position. This feature makes it possible to precisely adjust the track length of an axle. Thus, it becomes possible to obtain different vehicle handling characteristics based on the same rim and sprocket designs. These same components can be mounted on different models of motor vehicles. The invention therefore offers economies of scale, particularly in tooling and development.

[0072] The helical body multiplies the force applied to press the crown 26 into the rim 22. This facilitates their assembly. By rotating the helical bodies simultaneously, an operator can maintain strict parallelism between the crown 26 and the rim 22. Thus, the invention prevents the crown 26 from becoming stuck laterally and promotes adherence to the predefined wheel geometry.

[0073] The adjustment body 46 may include a screw head to facilitate tightening and loosening.

[0074] The crown 26 includes a tubular bearing surface 56 against the rim 22. The tubular bearing surface 56 is fitted into the rim 22. It is in contact with the rim 22. The toothed section 52 projects axially from said tubular bearing surface 56.

[0075] The adjusting body 46 is integral with the rim 22. According to an alternative of the invention, the adjusting body is integral with the crown, the toothed section being formed on the rim.

[0076] The rim 22 includes a radial cavity 58. The radial cavity 58 extends primarily axially. It is open axially and towards the axis of rotation; in this case, the main axis of rotation. The adjusting body 46 is located within the radial cavity 58. This arrangement protects the adjusting body 46. The radial cavity 58 is preferably located within the annular overhang 42. The adjusting body 46 is axially positioned at the level of said annular overhang 42. The annular overhang 42 is a radial overhang.

[0077] The adjustment device 36 comprises a plurality of fixing screws (not shown). The adjustment body 46 is angularly offset with respect to each of the fixing screws. This allows the forces to be distributed.

[0078] According to one embodiment of the invention, the toothed section 52 is a first toothed section. The ring further comprises a second toothed section with teeth oriented towards the first toothed section. This configuration facilitates rotational locking of the ring 26 within the rim 22.

[0079] Figure 4 shows a cross-section of a 22 rim for a motor vehicle wheel, according an embodiment of the invention. The motor vehicle may correspond to that shown in relation to one of Figures 1 to 3. The cut crosses the annular overthickness 42.

[0080] The rim 22 comprises an inner surface 60. The inner surface 60 is annular. It forms a tube around the axis of rotation 20 (shown in a schematic position). The inner surface 60 has a plurality of annular grooves 62 distributed axially. The annular grooves 62 are axially separated from each other. They are regularly spaced. The annular grooves 62 have an identical profile, for example, triangular.

[0081] Figure 5 shows a cross-section of a wheel 18 of a motor vehicle, according to a embodiment of the invention. The motor vehicle may correspond to that shown in relation to one of Figures 1 to 4. The cut crosses the annular overthickness 42 and an axial groove 40.

[0082] The ring 26 includes an annular rib 64. The annular rib 64 projects radially. It is arranged on the tubular support 56. It forms a circular ridge on the outer surface 66 of the ring 26. It has a profile complementary to the profile of the annular grooves 62, preferably triangular to optimize stability and the possibility of displacement.

[0083] The annular rib 64 extends into one of the annular grooves 62, the others remaining empty. The annular rib 64 fills the corresponding annular groove 62. It is housed there.

[0084] This arrangement provides axial locking in a precise position. The plurality of annular grooves 62 allows for as many adjustment positions. Furthermore, the complementarity of the The shapes contribute to the parallelism between the rim 22 and the crown 26. Thus, the invention optimizes robustness and adjustment precision.

[0085] Figure 6 shows a cross-section of a wheel 18 of a motor vehicle, according to another embodiment of the invention. The motor vehicle may correspond to the one shown in relation to one of Figures 1 and 4 to 5.

[0086] The wheel 18 comprises a rim 22 surrounding a ring 26 which is able to slide along the axis of rotation 20. Thus, it is possible to adjust an axial distance 68 between the mounting surface 70 of the ring 26 and the median plane 32 of the rim 22. The mounting surface 70 is also called the support plane. The axial distance 68 is also known as the "spacing". In the present figure, the ring 26 is in the second position. The wheel 18 includes an adjusting device 36 with at least one adjusting body 46.

[0087] The present embodiment generally corresponds to that shown in [Fig. 3]; it differs from it in that the adjusting body 46 comprises an adjusting cam 72 (shown in solid line) instead of the helical body. The adjusting cam 72 rotates relative to the rim 22 along a radial pivot axis 74. The adjusting cam 72 has an egg-shaped profile.

[0088] The adjusting cam 72 includes a stop surface forming its contour. By changing the angular orientation of the adjusting cam 72 relative to the rim 22, its radius against the sprocket 26 changes. Consequently, the position of the sprocket 26 varies relative to the rim 22.

[0089] According to another embodiment, the adjusting body 46 includes an adjusting bevel 76 (shown in dashed lines). The adjusting bevel 76 is axially positioned against the ring 26. The adjusting bevel 76 forms a wedge-shaped stop. It has a trapezoidal shape, two main sides of which are inclined relative to each other. The axial stop means 44 include a support 78 (shown in dashed lines), such as a radial finger, against which the adjusting bevel 76 bears. By changing the position of the adjusting bevel 76 in the circumferential direction, the adjusting bevel 76 allows the ring 26 to be moved axially.

[0090] According to a preferred embodiment, the wheel is made of steel or aluminum.

[0091] According to one embodiment, the wheel is made of a plastic material or composite. The plastic material may comprise a thermoplastic material or a thermosetting material. According to a preferred embodiment, the plastic material is selected from the group comprising polypropylene, polyamide, polyphthalamide, polyetheretherketone, polyphenylene sulfide, polyamide-imide, polyetherimide, polyarylamide, polyepoxide, unsaturated polyester, vinyl ester, or polyester-vinylester resins. For example, the composite material comprises a matrix made of a plastic material as described above with reinforcement. For example, the reinforcement includes glass or carbon fibers.

[0092] The wheel comprises at least 10% by weight of recycled plastic material based on the total weight of the plastic material; preferably from 10 to 80% by weight; more preferably from 20 to 60% by weight or from 30 to 40% by weight. The use of recycled plastic material reduces the vehicle's environmental footprint.

[0093] The invention comprises the combination of all the embodiments illustrated by all the figures.

[0094] Figures 2 to 6 are isometric views. They each respect a specific scale, real angles and real proportions.

Claims

Demands

1. Wheel (18) of a motor vehicle (10); the wheel (18) comprising: a rotation axis (20); a rim (22) around the rotation axis (20) and intended to receive a tire (16); a ring (26) between the rotation axis (20) and the rim (22); an axial position adjustment device (36) of the ring (26) relative to the rim (22) between at least a first position and a second position; characterized in that the adjustment device (36) further comprises axial stop means (44) with an adjustment body (46) movable between the ring (26) and the rim (22); said adjustment body (46) being configured to stop between at least one of the ring (26) and the rim (22) in order to axially lock the ring (26) relative to the rim (22) in the first position and in the second position.

2. Wheel (18) according to claim 1, characterized in that the rim (22) comprises an inner surface (60) with a plurality of axially distributed annular grooves (62); the crown (26) comprising an annular rib (64) configured to extend into one of said annular grooves (62).

3. Wheel (18) according to any one of claims 1 to 2, characterized in that the axis of rotation (20) is a main axis of rotation; the adjusting body (46) is movable in rotation about an auxiliary axis of rotation (50) parallel to the main axis of rotation; preferably, the rim (22) comprises an annular overthickness (42), the adjusting body (46) being axially at the level of said annular overthickness (42).

4. Wheel (18) according to any one of claims 1 to 3, characterized in that the adjusting body (46) is a helical body, at least one of the crown (26) and rim (22) comprising a toothed section (52) cooperating with the helical body.

5. Wheel (18) according to claim 4, characterized in that the crown (26) comprises a tubular bearing surface (56) against the rim (22), the toothed section (52) projecting axially from said tubular bearing surface (56).

6. Wheel (18) according to any one of claims 1 to 5, characterized in that the adjusting body (46) is integral with the rim (22); preferably, the rim (22) comprises a radial cavity (58) open towards the axis of rotation (20), the adjusting body (46) being in said radial cavity (58).

7. Wheel (18) according to any one of claims 1 to 6, characterized in that the adjustment device (36) comprises a plurality of fixing screws (38); the adjustment body (46) being angularly offset with respect to each of the fixing screws (38).

8. Wheel (18) according to claim 7, characterized in that the adjustment device (36) comprises axial grooves (40) through which the fixing screws (38) pass; the adjustment body (46) being axially at the level of the axial grooves (40); preferably, at least in the first or second position.

9. Wheel (18) according to any one of claims 1 to 8, characterized in that the adjusting body (46) is rotationally movable; preferably, the adjusting body (46) is a first adjusting body, the axial stop means (44) further comprising second adjusting bodies; the first adjusting body and the second adjusting bodies being angularly distributed around the axis of rotation (20).

10. Motor vehicle (10) comprising a wheel (18) with a rim (22) and a tire (16) mounted around said rim (22); characterized in that the wheel (18) conforms to any one of claims 1 to 9; preferably, the wheel (18) comprises an inflation valve (34) axially opposite the adjusting body (46).

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