DE102022110609A1 - Wheel device with radially external tire unit and method and use - Google Patents

Abstract

With conventional wheels with air/pressure tubes or with tubeless wheels, a tire or tire casing is pulled onto the rim of the wheel and pressurized from the inside. This concept has proven itself very well over the years and has been successfully implemented in a variety of ways, including optimizing the tire carcass for various areas of application. For the future, however, it is also a question of whether or to what extent this classic structure can be designed alternatively, in particular in order to be able to substitute at least some of the materials used in a resource-saving manner and/or to use them more sustainably. According to the invention, a wheel device is provided having a rim and a pressure hose accommodated therein and a tire unit attached to the rim, in which the pressure hose is arranged in a first radial section and the tire unit is arranged separately therefrom in a further radial section located further outward, the tire unit being non-positively/positively locking comes into contact with an inner contour of the rim. This opens up new application/usage possibilities.

Description

TECHNICAL FIELD

The present invention relates to a wheel device, in particular for electric vehicles, having a rim and a pressure hose accommodated therein and a tire unit attached to the rim, the tire unit being arranged/mountable radially outside of the pressure hose. The present invention further relates to a method for producing/assembling such a wheel device, in particular with at least partial automation of the assembly of the individual components, and to a corresponding system for this. Last but not least, the present invention also relates to the use of a rim of a wheel device that can be assembled using a locking ring to accommodate a tire unit. In particular, the invention relates to a device and a method according to the preamble of the respective independent claim.

BACKGROUND OF THE INVENTION

With conventional wheels with air/pressure hoses and also with tubeless wheels, a tire or tire casing is usually pulled onto the rim of the wheel and pressurized from the inside in such a way that the tire comes into contact with the rim in a non-positive/frictional manner. This concept has proven itself very well over the years and has been successfully implemented in a variety of ways, including optimizing the tire carcass for various areas of application. For the future, however, it is also a question of whether or to what extent this classic structure can be designed alternatively, in particular in order to be able to substitute at least some of the materials used in a resource-saving manner and/or to use them more sustainably or, for example, to change the material structure, for example with regard to one of the carcasses To be able to design the tire as simply as possible. One of the ideas and approaches for improving the structure and composition of all types of wheels is also driven by the requirement to be able to reuse the individual materials used more sustainably and to make the handling of the individual components easier over their entire life cycle.

According to the prior art, the tire casing is brought into contact with the rim in a force-fitting manner on both end faces of the rim by the internal pressure; The assembly of the tire, especially as far as car tires are concerned, is carried out by specially designed machines in which a tool or the wheel rotates and is moved in the circumferential direction relative to the rim in order to force the edge of the tire over the edge of the rim. Manual disassembly/assembly is therefore not possible with many wheel technologies, particularly due to the forces acting/applying them. An example can be the publication DE 10 2013 012 827 A1 which describes a pneumatic tire with a noise suppression body arranged in the tire cavity.

Based on the state of the art, there is a need for a new alternative concept for the structural design of the wheel and the design of the individual components, particularly the tire. There is also interest in improved or less complex material management. Last but not least, particularly with regard to the entire life cycle of the wheel/tire, there is also interest in technical solutions that enable greater variability without compromising the safety required for driving practice (for the actual use of the wheels).

SUMMARY OF THE INVENTION

The task is to provide a tire device in which greater variability in terms of optimization of individual properties and use of certain materials and components can be achieved while at the same time ensuring the highest possible level of safety in practical use. It is also the task of designing such a tire device in such a way that its production/provision and sustainable reuse or repair (e.g. overhaul/repair of partially worn components) or disposal can be simplified. Last but not least, it is the task to design a tire device in such a way that material selection can be simplified and can also be made from the widest possible range of materials, with the simplest possible structure of the individual components of the wheel.

This object is achieved by a wheel device according to claim 1 and by a method according to the independent method claim as well as by uses according to the independent use claim and by a system according to the independent device claim. Advantageous developments of the invention are explained in the respective subclaims. The features of the exemplary embodiments described below can be combined with one another unless this is explicitly denied.

A wheel device is provided, in particular for electric vehicles, comprising a rim and a pressure hose accommodated therein and a tire unit attached to the rim; According to the invention it is proposed that the Pressure hose in a first radial section and the tire unit are arranged separately therefrom (as an independent component) in a further radial section located further radially outward, the pressure hose (when used as intended, i.e. in the pressurized state) acting in such a way with a radially outwardly acting pressure force on an inner surface The effect of the tire unit is that the tire unit comes into contact with opposing inner contours of the wheel device in a non-positive/positive manner, one of the inner contours being provided by the rim. This provides a structure that is sequential in the radial direction, in which the tire unit can also be provided with a comparatively short radial extent (narrow radial extent), i.e. comparatively slim and material-saving, and without a function as a pressure body. The tire unit can be arranged/mounted radially outside of the pressure hose, i.e. independently of the pressure hose. In particular, the tire unit can be provided in a comparatively material-saving manner, even when designed from solid material. The pressure body for building up a counterpressure against the weight of a vehicle and for generating a contact pressure required for a predefinable amount of static friction can be provided independently of the tire unit by means of the pressure hose, which is preferably provided radially on the very inside of the rim and which is either directly applied to the Radially inner surface of the tire unit acts or acts indirectly on the tire unit with the interposition of a damping band in particular. The axial extent of the pressure hose is preferably longer than a radially external axial opening of the rim (mounting interface for tire unit, with or without locking ring).

A rim is to be understood in particular as a one-piece structure for accommodating the tire unit and not intended for dismantling, with a one-piece, integral composition at least in the radial direction. The component described here as a rim does not have any further subdivision or dismantling components, but rather represents a self-contained component, at least on the part of the tire unit and usually also on the part of the axle mount. The rim usually consists of a metallic material, but can also be made of a non-metallic (even lighter) lightweight material to save weight.

A “positive/positive connection” is understood to mean, in particular, an at least non-positive/static friction connection, which can optionally (optionally) be expanded by additional positive-fitting contours, e.g. in the case of certain requirements for torque transmission between the rim and the tire unit. It should be mentioned at this point that the invention can already be implemented based on pure adhesion, at least for common motor vehicle applications; In this respect, the optionally implementable form fit described here is to be understood as a further advantage of the concept according to the invention, for example in terms of even higher security or in terms of customizability for individual special applications. In this respect, the combined term “positive/positive” used here is also preceded by a reference to adhesion (static friction).

Personalized terms, as long as they are not formulated here in the neuter, can apply to all genders within the scope of the present disclosure.

The pressure hose is designed, for example, for the pressure range of 2-3bar that is common for many bikes, for example also for pressures of up to 6bar, depending on the application and depending on the design details.

It has been shown that the structure according to the invention can also ensure a high degree of safety for the actual use of the respective wheel device, for example when driving an electric car, especially if the tire unit is made of solid material.

Thanks to the structure according to the invention, it is not necessarily necessary to provide the tire unit with a complex combination of materials or a complex structure with a carcass made of, for example, steel or carbon materials. Rather, the tire unit can provide a comparatively high level of rigidity and dimensional stability with just one material, e.g. rubber or corresponding already common replacement materials (keyword Taraxacum/dandelion tire materials). In this respect, the tire unit described here can also be characterized by a very homogeneous material structure (in particular without the need for material mixing or a combination of materials within the tire unit). Additional reinforcements are not necessarily required. The structure according to the invention also facilitates, for example, the formation or repair or fundamental renewal of a specific profile on the tread of the tire unit. The person skilled in the art can define the material combination that is particularly advantageous for a particular application for the components of the wheel device described here or make the appropriate material selection.

Last but not least, replacing or repairing the tire unit can also be made easier by the fact that the tire unit is only attached to one side The rim (inner contour) comes into contact, so it can be held on the other side by another component (here: reference to lock ring).

The wheel device described here is particularly suitable for all conventional motor vehicle applications, and also for special applications in which a high level of safety and/or a specifically adapted tire profile or an application-specific structure or an application-specific dimensioning is required.

The rim can in particular be divided into six radial zones: axle mount, screw connection to axle, spokes, rim head with first and second radial installation zones, which are also described here as radial sections. Optionally, the first and second radial installation zones fall into the radial extent of the rim head; optionally, the rim head is further developed radially inwards. The tire unit is arranged in the second radial installation zone, i.e. radially on the very outside. A pressure hose and, optionally, a damping band are arranged in the first radial installation zone. In this respect, the second radial installation zone is also referred to here as a further radial section.

The pressure hose can be provided with a valve, which can be guided through a corresponding passage in the rim head, in particular in a radially inner area close to the spoke area.

According to one exemplary embodiment, the tire unit is designed as a circumferential tire band/tire tread band and preferably consists of solid material. This also provides advantages with regard to the at least non-positive interfaces to the rim or the locking ring.

According to one exemplary embodiment, the tire unit has a geometry which is conical in cross section at least in/in a radial section that overlaps with the rim. Last but not least, this promotes an effective frictional connection generated by the pressure hose on the opposing inner contours.

According to one exemplary embodiment, the tire unit has an hourglass-like, double-conical cross-sectional outer contour with mutually directed cone tips, in the manner of two conical sections that taper towards one another. This also provides an advantageous spatial integration of the tire unit, especially with good utilization of the available axial length (in relation to the direction of travel, corresponding to good utilization of the width of the wheel device).

According to one exemplary embodiment, the inner contour of the rim, which acts non-positively/positively on the tire unit, has at least one inwardly inclined radial section, in particular in the form of an inclined circumferential leg, for example with an inclination of approximately 20-30°, in particular 25°, relative to the radial direction . This also provides an advantageous embodiment for effective adhesion, optionally also in combined implementation with positive locking at least in the circumferential direction (in particular for the purpose of particularly high torque transferability, if necessary/desired). A closure ring described here can have a correspondingly designed geometry (mirror-symmetrical inclination axially inwards).

According to one exemplary embodiment, the wheel device comprises a locking ring which can be mounted laterally on the rim at the front and on which the tire unit comes into contact in a non-positive/positive manner, wherein one/the inner contour of the locking ring is preferably designed to be mirror-symmetrical to the corresponding opposite radial section of the rim, in particular with the same geometry or .Inclination like the force/positive inner contour of the rim. Last but not least, this also enables simple assembly in the sense of axial insertion of the tire unit.

Last but not least, the structure according to the invention also enables simple disassembly/assembly, in particular also manual disassembly/assembly without complex system technology or special tools.

According to one exemplary embodiment, a/the locking ring of the wheel device projects beyond the rim or the material of the rim at least in a radial section on the corresponding mounting side in which the tire unit or the tire band is present (i.e. at least from the further radial section further outwards towards the outside radially). extends, whereby for assembly purposes there may be a radial overlap radially inwards with the material of the rim). This also makes it possible to provide a specifically adapted form-fitting contour by means of the locking ring, by means of which the tire unit can be engaged in the axial direction.

According to one exemplary embodiment, the locking ring and the rim have corresponding fastening means, in particular at predefined circumferential positions, for example four or five screw connection components evenly distributed over the circumference. This also promotes secure assembly and a secure long-term hold, wherein a centering can optionally also be provided on at least one of the screw connection components.

According to one exemplary embodiment, the locking ring and/or the rim has an axially extending centering in the radial direction, in particular a cylindrical contour which extends axially at least in the single-digit millimeter range. This also helps avoid imbalances.

According to one exemplary embodiment, the wheel device comprises a damping band, which is arranged or interposed in a second radial section between the pressure hose and the tire unit and contacts the pressure hose radially on the inside and the tire unit radially on the outside (i.e. is arranged between the first radial section and the further radial section located further outwards), wherein the damping band is preferably also set up for acoustic damping. This provides an extended range of functions that can be optionally implemented depending on the application. The axial extent of the damping band is preferably longer than a radially external axial opening of the rim (mounting interface for tire unit, with or without locking ring). The axial extent of the damping band corresponds at least approximately to the axial extent of the pressure hose; In this respect, these two components can be accommodated in an at least approximately rectangular section of the cavity of the rim head.

According to one exemplary embodiment, a/the damping band of the wheel device has a surface designed/optimized for static friction radially on the inside and radially on the outside, in particular with a correspondingly high (static) coefficient of friction. Not least, such a design also promotes a minimization of relative movements and friction between the individual components. The person skilled in the art can specifically coordinate the corresponding surfaces (structures) with one another, in particular depending on the material selection made. Since the normal force exerted radially outward by the pressure hose can optimize adhesion across the entire width, the risk of wear on these contact surfaces is comparatively low.

According to one exemplary embodiment, at least one form-fitting contour, in particular in the manner of a tongue-and-groove connection, is provided at at least one circumferential position of the rim and at least one corresponding circumferential position of the tire unit, in particular at at least four or five circumferential positions equally distributed over the entire circumference and preferably also at both axial/lateral sides of the rim and tire assembly. This allows the connection between the tire unit and the rim/locking ring to be made even more secure. The tire unit is preferably made of solid material, i.e. the corresponding form-fitting contour is integrally incorporated into the material. This promotes very effective power transmission and a very secure and resilient connection/coupling, especially at high torques.

According to one exemplary embodiment, the rim has a rim head with a channel-like contour/structure, in particular with a radially inner, at least approximately rectangular cross-sectional section. Last but not least, this also benefits the unilateral assembly concept described here, in which the individual components can be inserted/slid in axially largely without any effort, i.e. without having to overcome any edges or rim edges.

According to one exemplary embodiment, the rim has a rim head which defines a cavity for completely receiving the pressure hose in the radial direction and optionally also a damping band of the wheel device, the cavity preferably also having a radial section of at least 30%, in particular at least 40%, for example in the range of 30-70% of the radial cross-sectional extent of the tire unit. Last but not least, this also favors a very robust arrangement with comparatively large areas for power transmission.

The aforementioned object is also achieved by a method according to the corresponding independent method claim, namely by a method for producing/assembling a wheel device, in particular a wheel device previously described above, wherein a rim and a pressure hose provided for arrangement in/on the rim and a tire unit to be fastened to the rim can be provided, wherein the pressure hose is arranged in a first radial section and the tire unit is arranged separately therefrom in a further radial section located further outwards, with a locking ring being mounted, in particular screwed, on the front side laterally on the rim in such a way that the tire unit comes to rest in a non-positive/positive manner on the locking ring and on a geometrically corresponding inner contour of the rim, the pressure hose being pressurized with a radially outwardly acting pressure force acting on an inner circumferential surface of the tire unit in such a way that the tire unit is non-positively/positively-fitting with a pressure-dependent predefinable static friction force on the inner contour of the rim and on the lock ring System comes, in particular when/by using a tire unit made of solid material described above, without the need to force the tire unit over an edge of the rim. This results in the advantages mentioned above, especially with regard to minimized assembly effort and optional manual action. With at least partial automation of the assembly of the individual components, at least the tire unit, the method can also be advantageously implemented for a large number of wheel devices.

According to one embodiment, a damping band is provided in a second radial section between the pressure hose and the tire unit before the tire unit and the locking ring are mounted, the damping band contacting the pressure hose radially on the inside and the tire unit radially on the outside (i.e. in a frictional and force-transmitting manner between the first radial section and the further one further outward radial section is arranged acting), the damping band being arranged in an acoustically damping manner between the tire unit and the pressure hose. Depending on the desired functional scope and area of application of the wheel device, the damping band can be provided in the sense of an additional intermediate assembly step, in particular by pushing it over the pressure hose from the front-lateral side (i.e. in the axial direction).

The aforementioned object is also achieved by using a rim that can be completed or assembled using a locking ring to accommodate at least one pressure hose and a tire unit and optionally also a damping band arranged between them, with the pressure hose in a first radial section and the tire unit separately therefrom in another further outer section Radial section can be arranged, wherein the locking ring is mounted laterally on the rim on the front side, in particular is screwed, that the tire unit comes into contact with the locking ring and on an inner contour of the rim in a non-positive/positive manner with a pressure-dependent predefinable static friction force when the pressure hose moves radially outwards acting pressure force acting on an inner lateral surface of the tire unit, in particular in electric vehicles, in particular with an axle mount of the rim in a mounted/screwed arrangement on an axle of the (electric) vehicle, in particular for providing a wheel device previously described above. This makes it possible to realize the advantages mentioned above, especially with regard to easy handling and great variability in terms of the ability to individualize the wheel device for specific applications.

The aforementioned object is also achieved by a system for assembling/providing a wheel device described above, the system being set up for front-laterally arranging a/the locking ring of the wheel device on a/the rim of the wheel device, centered relative to the axis of the wheel device and for non-positively/positively fastening the locking ring to the rim in such a way that a tire unit arranged between the rim and locking ring comes into contact with corresponding inner contours of the rim and locking ring in a non-positive/static friction fit and optionally also in a positive fit when a radially between the rim and Tire unit arranged pressure hose is/is pressurized, the system optionally also being set up for handling and arranging at least one of the following components on/in the rim: pressure hose, damping band, tire unit. This makes it possible to realize the previously mentioned advantages, particularly with regard to simplified disassembly/assembly. The components pressure hose, damping band and tire unit can also be inserted manually into the rim, largely without any effort and without a specially designed tool.

Summary: With conventional wheels with air/pressure tubes or with tubeless wheels, a tire or tire casing is pulled onto the rim of the wheel and pressurized from the inside. This concept has proven itself very well over the years and has been successfully implemented in a variety of ways, including optimizing the tire carcass for various areas of application. For the future, however, it is also a question of whether or to what extent this classic structure can be designed alternatively, in particular in order to be able to substitute at least some of the materials used in a resource-saving manner and/or to use them more sustainably. According to the invention, a wheel device is provided having a rim and a pressure hose accommodated therein and a tire unit attached to the rim, in which the pressure hose is arranged in a first radial section and the tire unit is arranged separately therefrom in a further radial section located further outward, the tire unit being non-positively/positively locking comes into contact with an inner contour of the rim. This also creates new application/usage possibilities.

BRIEF DESCRIPTION OF THE FIGURES

• 1 in einer stirnseitigen Seitenansicht in axialer Richtung gesehen eine Radvorrichtung gemäß einem Ausführungsbeispiel;
• 2A bis 2D jeweils in einer geschnittenen Seitenansicht einzelne Komponenten einer Radvorrichtung gemäß einem Ausführungsbeispiel;
• 3A bis 3C in zwei geschnittenen Seitenansichten und in einer stirnseitigen Seitenansicht einzelne Schritte beim Zusammenbauen von Komponenten einer Radvorrichtung gemäß einem Ausführungsbeispiel;
• 4 einzelne Schritte beim Zusammenbauen von Komponenten einer Radvorrichtung gemäß einem Ausführungsbeispiel;
• 5 in einer Seitenansicht eine Anlage zum Zusammenbauen/Montieren von Komponenten einer Radvorrichtung gemäß einem Ausführungsbeispiel;
• 6 ein Fahrzeug mit Radvorrichtungen gemäß Ausführungsbeispielen;

The invention is described in more detail in the following drawing figures, with reference being made to the other drawing figures for reference numbers that are not explicitly described in a respective drawing figure. They each show in a schematic representation:

• 1 in a front side view seen in the axial direction a wheel device according to an exemplary embodiment;
• 2A until 2D each individual components of a wheel device according to an exemplary embodiment in a sectional side view;
• 3A until 3C in two sectional side views and in a front side view individual steps in assembling components of a wheel device according to an exemplary embodiment;
• 4 individual steps in assembling components of a wheel device according to an exemplary embodiment;
• 5 in a side view a system for assembling/assembling components of a wheel device according to an exemplary embodiment;
• 6 a vehicle with wheel devices according to exemplary embodiments;

DETAILED DESCRIPTION OF THE FIGURES

The invention is first explained with general reference to all reference numbers and figures. Special features or individual aspects or aspects of the present invention that are clearly visible/representable in the respective figure are discussed individually in connection with the respective figure.

A wheel device 10 is provided which has a rim 11 which can be stored around an axis 1 and has spokes 3 and a rim head 11.1 which defines a cavity 11.2 or a receiving space, which is set up to receive at least one pressure hose 12 and one which can be arranged radially on the outside thereof Tire unit 14 (tire band/tire tread band) and optionally also a damping band 13 that can be arranged radially between them.

As one of the special features of the structure of the rim 11 according to the invention, a locking ring 15 is provided which can be mounted on the front side and laterally of the rim 11 and which, by means of its inner contour 15.3, in a radially overlapping radial section 15.5 on a corresponding radial section 11.5 of the rim and also on a corresponding radial section 14.3 of the Tire unit 14 or can be brought into non-positive contact with the corresponding contour, in particular depending on an internal pressure generated from the inside on the inner lateral surface 14.1 of the tire unit 14 by means of the pressure hose or depending on the resulting normal force acting on the contact surfaces. The attachment is carried out using corresponding fastening means 11.6, 15.6, which can be provided, for example in the form of screw connections, evenly distributed over the circumference. Optionally, a centering 11.8 is also provided, in particular to make assembly easier and to avoid imbalance. A centering can also be provided on one or more shafts of fasteners on the rim.

The rim 11 has an inner contour 11.3 in the rim head, which is defined on one side by an inwardly inclined radial section or leg 11.4. The closure ring 15 preferably has the same geometry or inner contour 15.3, i.e. also an inwardly inclined leg section. The attachment between the rim and the locking ring can take place in corresponding overlapping radial sections 11.5, 15.5.

In this respect, the wheel device 10 has a rim head with two or three characteristic radial sections, in each of which only one of the components described here is provided (in the manner of a radial series connection), namely the pressure hose in a first radial section R1 (radially furthest inside), then optionally in an optional second radial section R2 (i.e. radially on the outside of the first radial section) the optionally usable damping band, and finally radially on the very outside in a further radial section R3 located further radially on the outside, the tire unit (in particular tire tread band made of solid material).

The connection between the tire unit and the rim, i.e. the power transmission (at least as far as torque is concerned) between the ground and the (drive) axle, is essentially non-positive based on static friction on the adjacent contours of the rim or locking ring and tire unit. Optionally, a form-fitting contour 11.7 can also be provided, in particular in the manner of a tongue-and-groove connection, with corresponding form-fitting contours 14.7 being provided at the corresponding circumferential positions on the tire unit.

For example, the tire unit has a first radial section 14.3 in cross section conical geometry that narrows radially outwards and a second radial section 14.5 with a conical geometry that widens radially outwards. This also promotes purely non-positive edging/framing by means of the locking ring 15. The tread of the tire unit 14 can be provided with an individual profile 14.9, which can be used and renewed particularly advantageously if the tire unit 14 is made of solid material.

The wheel device 10 described here can be provided, for example, manually and/or by means of a system 20 for assembling/providing the wheel device in an assembled state or already mounted on the vehicle. For this purpose, the wheel device can be arranged on an axle 21. A handling robot 23 can bring the locking ring into contact with the rim head using a gripper 25 and attach it to the fastening means provided for this purpose using a tool 27, for example even with a predefined torque. Optionally, the system 20 can also be set up for an unbalance test, i.e. for a comparatively fast rotation of the wheel device at several predefined speeds.

A method for producing/assembling/providing such a wheel device 10 includes in particular the following steps: Step S1 Providing a rim 11, in particular on an axle, together with a pressure hose 12 and a tire unit 14, in particular in a system 20 for logistically assembling at least these components merged material flow; Step S2 arranging the pressure hose 12 in a first radial section R1; Step S3 Arranging the tire unit 14 in a further further outer radial section R3; Step S4 Assemble/fasten the locking ring 15 on the front-lateral side of the rim 11 and thereby securely/positively enclose the tire unit.

In other words: The locking ring can be mounted laterally on the front side of the rim in such a way that the tire unit comes into contact with the locking ring and on an inner contour of the rim in a non-positive/positive manner, with the adhesion being maximized by the pressure hose extending radially outwards acting pressure force acting on an inner surface of the tire unit is pressurized so that the tire unit comes into contact with the pressure-dependent predefinable static friction force on the one hand on the inner contour of the rim head and on the other hand on the locking ring. Optionally, after inserting the pressure hose and before inserting the tire unit between the pressure hose and the tire unit, a damping band 13 can be provided in a second radial section R2, the damping band in the intended installation position contacting the pressure hose radially on the inside and the tire unit radially on the outside.

The advantages of the method described here arise in particular from the fact that the individual components can be inserted into the rim head largely without force and without noticeable material stretching. Although the pressure hose can have a slightly smaller diameter than the rim head or its interface/coupling to the locking ring, this is not disadvantageous since the pressure hose is comparatively flexible in the relaxed state and can easily be inserted manually into the rim head.

For example, an electric vehicle 100 is equipped with the wheel devices described here. Special features of the invention are explained below with reference to individual figures or exemplary embodiments.

In 1 a wheel device 10 is shown in the axial viewing direction. The locking ring 15 surrounds the tire unit 14 and is mounted on the rim head 11.1. The individual spatial directions x, y, z (axial, transverse, vertical) are indicated by a coordinate system.

In the 2 The structure of the wheel device and the radial subdivision of the rim head are illustrated. In 2A The rim head is shown without inserted components and with the locking ring installed - such a condition affects, for example, storage. In 2 B A fully assembled wheel device is shown. In 2C The radial area of the rim head is illustrated. In 2D It is illustrated that the static friction between the tire unit and the rim head/locking ring can optionally also be supplemented by form-fitting contours, in particular in the form of several circumferentially distributed tongue-and-groove connections (whereby the respective groove is preferably provided in the tire unit).

In the 3 Assembly is explained in more detail. In 3A The rim head is shown with the pressure hose already arranged therein and the damping band lying radially on the outside. In 3B the tire unit mounted by front-side-lateral insertion is shown in the intended arrangement on the damping band, whereby the locking ring 15 can be placed in the axial direction, in particular supported by an axial guide or by a centering 11.8 acting in the radial direction. In 3C the assembled wheel device 10 is shown, with the fastening means 15.6 already mounted. The fastening means 15.6 can, for example, also be integrally connected to the rim head in the form of welding threaded bolts.

In 4 Individual steps of the process described here are illustrated. In the situations shown as a diamond between the respective steps S1, S2 or S2, S3 or S3, S4, a check can also be carried out, for example with regard to the correct relative arrangement of the components to one another, either a manual visual inspection and/or an automatically implemented sensory detection .

In 5 a corresponding system 20 is shown for carrying out the method steps described here. The system 20 can have an (electric) motor for driving the axis 21 and at least one measuring unit for detecting, for example, acceleration forces on the axis 21.

In 6 1 shows a roughly schematic application of the wheel devices 10 described here for an electric vehicle 100 with four wheels, for example for use as a car (passenger car) for a private household or as a logistics vehicle for food or mail shipments.

Reference symbol list

1

axis

3

spoke

10

Wheel device

11

rim

11.1

Rim head

11.2

Cavity or receiving space, defined by rim head (inner contour)

11.3

Inner contour

11.4

inwardly inclined radial section or leg of the rim

11.5

overlapping radial section

11.6

Fasteners

11.7

Positive locking contour, particularly in the form of a tongue-and-groove connection

11.8

centering

12

pressure hose

13

Damping tape

14

Tire unit (tire band/tire tread band)

14.1

Inner lateral surface

14.3

first radial section with a conical geometry in cross section

14.5

second radial section with a conical geometry in cross section

14.7

Positive locking contour, particularly in the form of a tongue-and-groove connection

14.9

profile

15

Locking ring, can be mounted laterally (in the axial direction) on the front side

15.3

Inner contour

15.5

overlapping radial section

15.6

Fasteners

20

System for assembling/providing a wheel device

21

axis

23

Handling robots

25

Gripper for lock ring

27

Fastener tool

100

Electric vehicle

S1

Providing rim and pressure hose and tire unit

S2

Arranging the pressure hose in a first radial section of the rim

S3

Arranging the tire unit in a further radial section located further outwards

S4

Mounting/attaching one of the locking rings to the front-lateral side of the rim

R1

first radial section

R2

second radial section (radially outside of the first radial section)

R3

another radial section located further radially on the outside

x, y, z

Spatial directions (axial, transverse, vertical)

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was 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 102013012827 A1 [0003]

Claims (10)

Wheel device (10) in particular for electric vehicles, comprising a rim (11) and a pressure hose (12) accommodated therein and a tire unit (14) attached to the rim; characterized in that the pressure hose (12) is arranged in a first radial section (R1) and the tire unit (14) is arranged separately therefrom in a further radial section (R3) located further radially outwards, the pressure hose (12) being provided with a pressure force acting radially outwards acts on an inner circumferential surface (14.1) of the tire unit (14) so that the tire unit comes into contact in a non-positive/positive manner on opposite inner contours (11.3, 15.3) of the wheel device (10), one of the inner contours (11.3) passing through the rim (11). is provided. Wheel device after Claim 1 , wherein the tire unit is designed as a circumferential tire band/tire tread band and preferably consists of solid material; and/or wherein the tire unit has a geometry which is conical in cross-section at least in/in a radial section which overlaps with the rim; and/or wherein the tire unit has an hourglass-like, double-conical cross-sectional outer contour with mutually directed cone tips, in the manner of two conical sections that taper towards one another. Wheel device according to one of the preceding claims, wherein the inner contour of the rim, which acts non-positively/positively on the tire unit, has at least one inwardly inclined radial section, in particular in the form of an inclined circumferential leg, for example with an inclination of approximately 20-30°, in particular 25° opposite the radial direction. Wheel device according to one of the preceding claims, wherein the wheel device comprises a locking ring which can be mounted laterally on the rim on the front side and on which the tire unit comes into contact in a non-positive/positive manner, one/the inner contour of the locking ring preferably being designed to be mirror-symmetrical to the corresponding opposite radial section of the rim, in particular with the same inclination as the non-positive/positive inner contour of the rim; and/or wherein one/the locking ring of the wheel device projects beyond the rim or the material of the rim on the corresponding mounting side in which the tire unit is present, at least in a radial section; and/or wherein the locking ring and the rim have corresponding fastening means, in particular at predefined circumferential positions, for example four or five screw connection components evenly distributed over the circumference; and/or wherein the locking ring and/or the rim has an axially extending centering in the radial direction, in particular a cylindrical contour which extends axially at least in the single-digit millimeter range. Wheel device according to one of the preceding claims, wherein the wheel device comprises a damping band which is arranged in a second radial section between the pressure hose and the tire unit and contacts the pressure hose radially on the inside and the tire unit radially on the outside, the damping band preferably also being set up for acoustic damping; and/or wherein a/the damping band of the wheel device has a surface designed/optimized for static friction radially on the inside and radially on the outside. Wheel device according to one of the preceding claims, wherein at least one positive locking contour, in particular in the manner of a tongue-and-groove connection, is provided at at least one circumferential position of the rim and at least one corresponding circumferential position of the tire unit, in particular at at least four or five circumferential positions evenly distributed over the entire circumference and preferably also on both axial/lateral sides of the rim and tire unit; and/or wherein the rim has a rim head with a groove-like contour/structure; and/or wherein the rim has a rim head which defines a cavity for completely receiving the pressure hose and a/the damping band of the wheel device in the radial direction, wherein the cavity preferably also accommodates a radial section of at least 30%, in particular at least 40% of the tire unit. Method for producing/assembling a wheel device (10), in particular a wheel device according to one of the preceding claims, wherein a rim (11) and a pressure hose (12) provided for arrangement in/on the rim and a tire unit (14) to be fastened to the rim ). is screwed so that the tire unit (14) comes into contact with the locking ring (15) and on an inner contour (11.3) of the rim (11) in a non-positive/positive manner, the pressure hose (12) acting radially outwardly on an inner surface (14.1) of the tire unit is pressurized so that the tire unit (14) is non-positively/positively connected pressure-dependent pre-definable static friction force comes to rest on the inner contour (11.3) of the rim and on the locking ring (15). Method according to the preceding method claim, wherein a damping band is provided in a second radial section between the pressure hose and the tire unit before the tire unit and the locking ring are mounted, the damping band contacting the pressure hose radially on the inside and the tire unit radially on the outside, the damping band having an acoustically damping effect between the Tire unit and the pressure hose is arranged. Use of a rim (11) that can be assembled using a locking ring (15) to accommodate at least one pressure hose (12) and a tire unit (14) and optionally also a damping band (13) arranged between them, the pressure hose in a first radial section (R1) and the tire unit be arranged separately from this in a further radial section (R3) located further outward, the locking ring (15) being mounted laterally on the front side of the rim, in particular screwed, in such a way that the tire unit is non-positively/positively locked with a pressure-dependent predefinable static friction force on the locking ring and on an inner contour the rim comes into contact when the pressure hose (12) is pressurized with a radially outwardly acting pressure force acting on an inner surface of the tire unit, in particular in electric vehicles (100), in particular with an axle mount of the rim in a mounted/screwed arrangement on an axle of the (electric) vehicle. System (20) for assembling/providing a wheel device (10) according to one of Claims 1 until 6 , wherein the system (20) is set up for front-laterally arranging a/the locking ring (15) of the wheel device on a/the rim (11) of the wheel device, centered relative to the axis of the wheel device, and for non-positively/positively fastening the locking ring to the Rim in such a way that a tire unit (14) arranged between the rim and locking ring comes into contact with the corresponding inner contours (11.3, 15.3) of the rim and locking ring in a non-positive/static friction fit and optionally also in a form-fitting manner when a pressure hose arranged radially between the rim and the tire unit (12) is/is pressurized, the system (20) optionally also being set up for handling and arranging at least one of the following components on/in the rim: pressure hose (12), damping band (13), tire unit (14) .

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