WO2020038534A2

WO2020038534A2 - Rim system with a central locking system, and safety system and adapter element for the rim system

Info

Publication number: WO2020038534A2
Application number: PCT/DE2019/100767
Authority: WO
Inventors: Dirk Krämer
Original assignee: First Composites Gmbh
Priority date: 2018-08-24
Filing date: 2019-08-23
Publication date: 2020-02-27
Also published as: EP3840959A2; WO2020038534A3

Abstract

The invention relates to a rim system with a central locking system, having: a wheel rim with a first front rim flange and a second rear rim flange facing toward the vehicle; a rim base extending therebetween and a rim spoke system having multiple spokes or a rim plate; and means for central mounting on a motor vehicle at the inside diameter of the rim spoke system or the rim plate, wherein the wheel rim, according to the invention, has a hybrid design and means for centrally mounting the wheel rim on a motor vehicle are formed on the metal hub element or wherein the wheel rim can be connected to the motor vehicle by means of an adapter element which can be operatively connected to the metal hub element, wherein, as required, a safety system for the wheel rim is provided with which a central nut which is screwed onto an external thread of a rim receptacle of the adapter element is captively held and/or wherein, as required, the adapter element is in the form of an adapter cooling element with a cooling arrangement. Furthermore, the invention relates to an adapter element and a safety system for the rim system.

Description

Felqensvstem with central locking as well as security and adapter element for the

Rim nsvstem

The invention relates to a rim system with central locking and a security system and an adapter element for the rim system according to the preamble of the 1st, 14th and 20th patent claims.

The rim system in particular for motor vehicles, preferably cars, application.

A wheel, in particular for a two-wheeler, is known from the publication DE 101 20 203 C2. This consists of a rim, a hub and spoke-shaped connecting struts between them. The wheel is divided vertically and thus consists of two halves, each containing half the profile of the hub, the rim and the connecting struts. In the area of the connection plane of the rim and the hub, these geometries are designed such that they partially overlap. The parts of the wheel are preferably made of aluminum, magnesium or alloys of these materials, but carbon fiber reinforced materials can also be used. The

Connection areas of the half-shells partially interlock and preferably have a cylindrical geometry. The half-shells are connected using a tongue and groove connection, adhesive connection, screw connection, rivet connection or a

Shrink connection. The connection can be designed to be form-fitting, force-fitting or material-fitting. In addition, a sealant is used in the area of the connected half-shells.

A multi-part two-wheel rim is disclosed in the publication DE 20 2010 000 722 U1. This consists of two rim beds and a wheel rim, the wheel rim containing the wheel bearings. The three parts of the two-wheel rim are radially connected to each other. This is done by screwing or alternatively inseparably by riveting. In the connection levels of the rim well and the

A flat gasket can be arranged on the wheel rim. This enables the use of

tubeless tires. The materials used to manufacture the wheel can include fiber composite materials or aramid fibers.

A wheel rim is described in the publication DE 10 2006 062 538 A1. This also consists of three parts, two rim beds and a rim star. The rim beds have a circumferential outer surface for receiving a tire. The star and the beds are connected by screws. According to the publication, the rim star is made of stainless steel.

The document US 6 425 641 B1 discloses a multi-part spoke wheel. The rim can consist of two or three parts. In the two-part version, the parts have rim flanges for mounting the tire. In the three-part version, the third part is arranged between the parts with rim flange. It is therefore possible to adapt the rim width to the tire width using identical outer parts. Seals can be arranged between the connection planes of the parts, so that tubeless tires can be used. In the The contour of the parts pointing in the direction of the hub is designed such that it is suitable for receiving spokes. The wheel is preferably made of composite material.

Light-weight vehicle wheels with carbon fiber inserts are presented in the publication DE 10 2012 213 050 A1. Cavities are created in metallic vehicle wheels, which are filled with carbon fiber reinforced inserts. The disadvantage is that fiber composites based on carbon fibers have a different thermal expansion than metallic materials. This means that voltage changes occur in the boundary layer between the two structures, which additionally stresses the connection and may destroy it. This phenomenon will

counteracted by bringing the metallic material to operating temperature before introducing the carbon structure. The rim described therefore has a complicated structure and method for its production.

In the documents DE 10 2013 217 919 A1 and EP 2 848 426 A1 a wheel hub,

especially for aircraft. It is a three-part component. This consists of a rim and two rim flanges. The individual parts are made of fiber-reinforced plastic and are detachably connected to each other. Furthermore, it is stated that at least one of the rim flanges is pushed axially onto the rim and is secured against displacement by a closure element. The position of the parts can be secured to one another in a positive or non-positive manner.

The publication WO 96 08 383 A1 describes a wheel joined under pressure. This also consists of two half-shells which have a comb-shaped geometry in the area of the hub and the rim. This interlocks and the joining process takes place by applying a compressive force. The comb structures can be designed in such a way that, in addition to the non-positive connection, they also implement a positive connection. Furthermore, it is stated that a seal can be located between the two half-shells, in the area of the rim, so that tubeless tires can also be used.

In the publications DE 10 2006 051 867 A1 and WO 2008 052 878 A2, a wheel is described which is wound from fiber-reinforced plastic and describes a method for its production. It consists of a rim star and a rim bed. The rim star as well as the rim bed are wound from synthetic resin-soaked carbon fibers and bonded together. The rim star is constructed in several parts, preferably from three triangular structures with rounded corners. The carbon fibers are wound dry according to the documents and then impregnated with synthetic resin in a closed form under pressure.

GB 1 474 623 A discloses a wheel rim for a motor vehicle, the wheel rim having a first ring-shaped element made of light metal or synthetic resin and a second ring-shaped element made of a material which can be pressed. The ring-shaped elements are screwed together, the screw connection being visible outside the Rim bed is arranged. A seal is provided between the first and second ring-shaped element to compensate for unevenness between the materials and to seal the rim.

The document US 5,045,261 A describes a method for producing a cup-shaped object from a fiber-reinforced plastic. This object can preferably be designed in the form of a two-part rim. The rim has an inner and outer half, the inner and outer half being screwed to one another pointing radially inward.

In addition, reference is made to the document FR 1.595.590. In this document, a rim made of metal is described, which consists of several parts. The individual parts of the rim have a radially outward-pointing flange in which the rim parts are screwed. However, such metallic rims are very heavy.

The object of the invention is to develop a rim system with central locking, a securing system for the wheel rim and an adapter element for the rim system, which has a light and simple construction, and also and adaptability to all

Vehicle classes and types should be guaranteed and if necessary a decoupling of the wheel rim from a brake disc with respect to heat transfer during a

Braking process should be guaranteed and / or, if necessary, a security system prevents the accidental loosening of a central nut of a central locking system.

This object is achieved with the features of the first, fourteenth and twentieth claims.

Advantageous refinements result from the subclaims.

The rim system according to the invention is known to have a wheel rim with a front rim flange and a rear rim flange facing the vehicle, as well as a rim bed extending therebetween and with a rim star with several spokes or one

Rim disc and means for a central mount on a motor vehicle on the inside diameter of the rim star or the rim disc, the wheel rim according to the invention in

Hybrid construction is formed and

the rim star or the rim disc

o has a metallic hub element on the inside diameter,

o one or more radially outwards from the metallic hub element

extending cores made of rigid foam are present and

o where the hard foam core or cores and the metallic element as

Inserts arranged in a single or multi-layer fiber composite material, the front and rear rim flange and the rim base consist of one or more layers of fiber composite material and where

the means for a central reception of the wheel rim on a motor vehicle are formed on the metallic hub element or

the wheel rim can be connected to the motor vehicle via an adapter element which can be operatively connected to the metallic hub element,

o if necessary, a safety system for the wheel rim is available, with which a central nut is attached to an external thread of a rim holder of the

Adapter element is screwed, is secured against loss

and or

o If necessary, the adapter element is designed in the form of an adapter cooling element with a cooling arrangement.

Thus, according to the invention, the rim system with central locking comprises a wheel rim made of a fiber composite material, which can preferably be mounted on an associated adapter element and, if necessary, is secured against loss of the central nut by means of an associated securing system.

The central metallic hub element has a central one

Bore and a central receptacle with a clamping surface for a central nut and a rim flange for mounting on a motor vehicle

on, wherein the wheel rim can be connected directly to the motor vehicle via the hub element or via an adapter element operatively connected to the hub element, and wherein the metallic hub element on its contact surfaces for

Vehicle and / or to the adapter element and / or to the central nut of the

Fiber composite material is released.

The wheel rim manufactured according to the invention from a fiber composite material is intended in particular for a motor vehicle, the wheel rim being secured by means of a central lock

Central nut can be mounted on a motor vehicle. The wheel rim has a rim star or a rim disk and a rim well. The wheel rim is formed at least in two parts. The rim base consists of a first annular element with a first circumferential rim flange and a coaxially arranged second annular element with a second circumferential rim flange, which is designed to receive a tire, the first or second annular element being formed in one piece with the rim star or the rim disk is. Alternatively, the rim star or the rim disk can also be formed separately and connected to the first and second annular elements of the rim well.

The rim star or the rim disk has a central metallic hub element (hereinafter also referred to as a star element) with a clamping surface for the central nut and one

Rim flange for mounting on the motor vehicle and at least three spoke elements extending in the direction of the rim flange when designed as a rim star or a full-surface rim disc, the wheel rim being connectable to the motor vehicle directly on its hub element or via an adapter element. The first and second are advantageously annular Element on its end face facing away from the first and second rim flange, releasably connected to one another or releasably connected to the rim star or the rim disk.

The end face of the first annular element facing away from the front first rim flange is preferably designed in the form of a radially outward-pointing first flange. The end face of the rear second annular element facing away from the rim flange is likewise designed in the form of a radially outwardly pointing second flange. The first flange has a first contour pointing in the direction of the second flange. The second flange has a second contour which points in the direction of the first flange and corresponds to the first in such a way that the first and second annular elements can be centered on one another. With the

The first or second annular element of the rim star or the rim disk is formed in one piece or fastened, preferably screwed, between the first and second flange.

The first and second flanges formed from the fiber composite material of the ring-shaped elements of the first and second rims are also screwed together at their radially outwardly facing regions. This has the advantage that the radial

The screw connection is located within the wheel that will be mounted later, so that the screw connection is covered by the tire after the tire has been installed.

Furthermore, the screwed connections are easier to produce due to the radially outward-pointing regions, since they are easily accessible.

There are no additional metal sleeves or others in the first and second flanges

Inserts inserted in the area of the openings for the screw connections. However, the thickness of the fiber composite material in the area of the first and second flange can be increased in the area of the first and second flange.

A seal (preferably a liquid seal) can be placed between the first and second flange and thus between the first and second ring-shaped element or between the flanges and the rim star or rim disk fastened between them.

be provided. However, it is also possible to use a rubber seal that is in the range of

Screws has openings to use, for example a cut very thin rubber seal.

By screwing the two elements in the area of their radially outward-pointing flanges, contrary to the usual and known methods for screwing multipart wheels, the screws are completely covered by the mounted tire in the ready-to-drive state. This is not only a design or aesthetic element, but also excludes 100% that the radial screw connection is stressed or weakened by the effects of weather or acid. Furthermore, there is no time-consuming cleaning of the individual screws and their surroundings. A radially outward pointing screw connection for connecting annular elements of a wheel rim made of fiber composite material, which in particular without additional metallic inserts in the The area of the fiber composite material of the first and second flanges adjoining the hub element (star element) has so far not been known from the prior art.

The rim star of the rim, which is made up of a hybrid composite with an outer skin

Fiber composite material has a central star element with only a clamping surface and a rim flange for mounting on a motor vehicle and at least three spoke elements extending in the direction of the rim flange. The number of spoke elements can be selected depending on the design.

Even in a version with a rim disk, spoke elements with hard foam can be provided, which are provided with an outer skin made of fiber composite material, the fiber composite material also extending between the spoke elements, so that the area between the spokes consists entirely of fiber composite material.

A foam core connects to the spoke elements formed on the hub element / star element, which extends the spoke into the area of the rim ring (rim bed), the foam cores engaging in a positive manner in the star element. This points

Spoke element has a first contour and the foam core has a corresponding second contour. The star element is preferably made of a metallic material, for example steel or aluminum.

The star element (hub element) and the adjoining foam cores are encased in a fiber composite material in such a way that, in their combination, they form the rim star. Furthermore, the fiber composite material can form the annular element adjoining the rim star or the rim disk with a rim flange if the rim star or the rim disk is formed in one piece therewith, the area of the clamping surface of the star element and the rim flange being left out, i.e. is not covered by fiber composite material. This results in the one-piece structure of the rim star with the annular element.

Because the hub element is star-shaped in the form of a star element, in which the rigid foam of the rim star or the rim disk engages, good power transmission and a stable bond are created in connection with the fiber composite material.

The ring-shaped element which does not have the rim star and which has a further rim flange also consists of a fiber composite material.

The layers of the fiber composite material are arranged according to their strength and the direction of pull.

The fiber composite material advantageously consists of carbon, aramid, glass fiber or a combination of the aforementioned materials. The structural structure of the wheel rim consists of several components and different materials. The construction takes place “in batches”, starting with the outer visible surface. The first layers are preferably carbon fabric and are inserted into the tool and arranged according to their strength or the direction of tension. It is prepared according to specifications, how and in what amount individual cuts of the fabric are to be used.

The fiber fabric and / or fiber fabric are in different orientations

Cut to size and inserted into the tool according to the previously created site plan. Between the lower and upper cuts in the area of the later rim star, a core made of rigid foam is directed radially from the inside to the outside of each strut of the star

Inserted part. Additional layers of fiber scrim or fiber fabric are positioned above this.

The radially inner central hub element / star element is also used as an insert in the tool. This metallic star element is the central element of the wheel rim. Placing the star element on a special centering mandrel of the tool ensures that the finished wheel rim will run later. Connected to the metallic star element are the foam core (s) made of hard foam as inserts between the draped layers of the

Arranged fiber material. These foam cores engage in a contour predetermined by the star element in the area of the spoke elements, and are connected to the star element. The combination of star element and foam cores roughly represents the final design of the rim star or the rim disc.

Furthermore, they enable a further layer build-up without the entire scrim of the fiber composite material collapsing. The star element and foam cores are now carefully enveloped by the fiber composite material, in particular by the carbon fabric. The foam cores can no longer be seen later. The star element represents a hard point of the wheel rim.

The wheel rim has an axial contact surface in the area of the star element, which is not of

Fiber material is covered and can be connected to the motor vehicle directly or via an adapter element. The wheel rim is advantageously mounted on a wheel hub with a central lock.

The star element can only be recognized later on the mating surface for the central lock with the associated nut and on the rim flange, because there is no fiber material in these positions either. The "protruding" of the metallic star element from the

Fiber composite material is intended, since clamping the wheel directly onto carbon would not provide any useful results or strength here.

To cover the abutting edge of carbon and metal on the visible side, a metallic ring is glued into the groove provided. The end ring is primarily used for the look and ensures a clean and well-thought-out overall impression. Furthermore there are important information about the bike or its correct information on the end ring

Fastening in the form of tightening torques, thread direction, rim type, manufacturer logo, etc. both typographically and with pictograms.

In an advantageous embodiment, a tire pressure sensor is integrated in the wheel rim.

Furthermore, an RFID chip can be integrated into the rim. RFID (radio-frequency identification = identification with the help of electromagnetic waves ") refers to a technology for transceiver systems for the automatic and contactless identification and localization of objects and living things with radio waves.

Production-related data, the running time (e.g. how many kilometers) and other relevant parameters can be stored on the RFID chip.

This creates the possibility, on the one hand, to follow the entire production process and, on the other hand, to store all the data that is of interest to the manufacturer and subsequently to the customer. This includes production-related data such as the date of manufacture, the builder / manufacturer of the individual wheel, the serial number, the warranty period, the size, the weight, the speed index, releases, approval numbers and other information such as the runtime etc. The RFID chip can be one Provide protection against theft if the rightful owner can be determined.

The data of the RFID chip can be read out, for example, via an app in a terminal.

It is also possible to record safety-relevant data in conjunction with appropriate sensors and, for example, to determine whether the rim is damaged. This information can also be output to a terminal in particular via an app.

Installation using a central lock offers additional advantages compared to screwing with four or five wheel bolts. The wheel rim can be adapted to any motor vehicle using a central locking adapter.

The connection via the central locking adapter is made using a component which is a

serves distinctive connection between the wheel rim and the motor vehicle. The adapter is used as a turned part e.g. made of a light metal. And can be made in one or two parts. Alternatively, the adapter can be manufactured as a die-cast part. The adapter receives

Through holes that are precisely matched to the respective vehicle. This means that not only all common and well-known bolt circles can be realized spontaneously and individually, but even the dimensions that are less common on the market can be manufactured so that the wheel rim can also be used here. So it is possible that a purchased bike is not just one

Motor vehicle or a bolt circle is limited. With a possible

The wheel can be taken over when changing vehicles. There is only a new central locking Adapter required, resulting in significantly lower costs compared to a new complete wheel set.

Advantageously, the rim halves in the form of the first and second annular elements can guarantee correct assembly after final assembly with a seal over the connecting flange surfaces of the first and second flanges. Another advantage is that the seal shows afterwards that the rim was not manipulated by third parties.

The wheel rim or the first and second ring-shaped element as well as the rim star or the rim disk are produced in the RTM process, in particular with a device and a process according to EP 2 588 297 B1. The device has an injection unit and a closable tool provided with a mold cavity. The layers of fiber material are draped into the mold cavity and the inserts are inserted as intended. After the tool has been closed, an injection is carried out by means of the injection unit which is coupled to the tool

Injection resin from a resin-hardener mixture introduced into the tool, which the

Penetrates fiber material. After the resin-hardener mixture has hardened, the tool is opened and the first element or the second element can in each case be removed from its tool.

A one-piece wheel rim can be manufactured, but the wheel rim preferably consists of two or three individual parts, e.g. a separate first and second ring-shaped element, each with a rim flange and a rim star fastened in between or a rim disk arranged between them, or from a first ring-shaped element with a first rim flange and rim star or rim disk formed in one piece with the first ring-shaped element and from a ring element connected to the first ring-shaped element second ring-shaped element with the second rim flange. Alternatively, the rim star can also be formed in one piece with the second annular element.

When using a central closure, the fibers can be arranged in such a way that the central closure does not penetrate any fibers, as a result of which a continuous fiber is achieved. Furthermore, a thermal coating, in particular a heat-resistant coating, can be integrated as part of the construction process.

The use of a fiber composite material for a multi-part wheel rim is seen on the one hand as the material of the future, whereby the efficiency and performance can be increased by means of the lightweight construction.

When using a central locking fixture, there are no complicated geometries due to multiple stress points. A construction suitable for the material can be guaranteed.

The multi-part design of the wheel rim provides an optimal range of products and optimizes warehousing. Furthermore, costs for multi-part wheel rims can be reduced because of a new design Instead of buying a complete wheel, you only have to buy a new rim star with an integrated ring-shaped element or just a new rim star or a new rim disc.

The multi-part structure also serves to reduce costs in the event of damage, e.g. in case of a

Curb damage can be replaced instead of a complete wheel only the rim star with an integrated ring-shaped first element or only the first ring-shaped element, if this is formed separately.

The weight saving of the rim set results in an increase in performance and a reduction in consumption. In addition, the tire load and tire wear are reduced. The reduction in weight is approximately 7 kg compared to a comparable aluminum wheel rim, which means that a weight reduction of 28 kg can be achieved with four wheel rims. Especially with regard to e-mobility, this weight reduction can make larger ones

Ranges can be achieved.

The rim system can also be a safety system for the wheel rim with the

Have central locking system on the adapter element on which the wheel rim can be mounted with a corresponding central bore, and a central nut which is screwed onto an external thread of the wheel holder and thus fixes a wheel rim on the wheel holder. The

On its cylindrical inner wall, the wheel receptacle has a diameter widening, spaced from the end face of the wheel receptacle, with a contact surface, the

Extension of the inner diameter is in the form of a shoulder or a circumferential groove. On a contact surface of the central nut facing away from the wheel rim, there is a coaxially arranged fastening ring with a circumferential ring surface, the

Fastening ring has at least two deflectable shaped elements with active elements, which are at least partially in operative connection with the contact surface of the diameter extension, the shaped elements being operatively fixable by means of a holding element such that deflection of the shaped elements can be blocked. The shaped elements can be deflected in particular for loosening and mounting the fastening ring and thus the central nut. The deflection of the shaped elements is preferably prevented by means of a positive fit and the shaped elements are detachably fixed.

The shaping elements are preferably pivoted, the shaping elements being pivotally connected to the fastening ring by means of a joint.

In an advantageous embodiment, the pivotable joint is designed in the form of a dowel pin, the dowel pin being mounted with a first end at a first bearing point and with a second end at a second bearing point of the fastening ring. The shaped element is arranged between the first and second bearing point of the fastening ring and has a bore through which the dowel pin is guided.

For a simplified assembly and disassembly of the fastening ring, the shaped elements have a recess on their outward-facing side, in which a circumferential, the shaped elements connecting, snap ring is arranged. The snap ring exerts a force on the shaped elements in the direction of the wheel hub in such a way that the shaped elements are deflected in the direction of the wheel hub. The fastening ring can be easily removed and inserted when the holding element is removed. The holding element is designed such that in the assembled state it exerts a force directed against the snap ring on the shaped elements, so that shaped elements and the active elements are pivoted radially outward and can be brought into a working connection with the contact surface of the diameter extension.

Each shaped element preferably has an active element formed thereon, which is designed in the form of a radially outwardly extending elevations. This elevation is preferably designed in the form of a hook-shaped elevation and engages in the diameter extension or groove and fixes the fastening ring on the wheel holder. Due to the ring surface with which the fastening ring is in contact with the central nut, the fastening ring prevents the central nut from loosening.

The holding element is disc-shaped with clip elements extending on the underside and can be plugged onto or inserted into the fastening ring in such a way that the holding element in the area of each molded element has the clip element which engages on the inside of the molded elements pointing in the direction of the wheel axis, by means of the clip element deflection of the shaped elements can be prevented. The clip element encompasses the shaped element and can be supported on the edge of the shaped element. The disk-shaped base body of the holding element is supported on the retaining ring, thereby avoiding loosening of the entire security system.

In an alternative embodiment of the holding element, the shaped elements have an internal thread, at least in some areas, into which the holding element is inserted in the form of a holding screw such that the shaped elements are fixed in their position. A deflection is prevented by the screw shaft of the holding element.

In an alternative embodiment of the shaped elements, these are formed in one piece in an elastically resilient manner on the fastening ring. In this embodiment, too, the shaped elements have radially outwardly directed working elements, preferably elevations, which are in engagement with the diameter widening. The deflection can be prevented by means of a holding element in the form of a holding screw or in the form of a holding element with clip elements, as a result of which the fastening ring is fixed to the wheel receptacle. For a simplified installation of the

Fastening ring is chamfered on the edge region of the shaped elements pointing outward in the direction of the wheel rim.

The rim system according to the invention can furthermore have an adapter element which is designed in the form of an adapter cooling element and prevents the wheel rim from coming out

Fiber composite material is not heated too much, since the thermal bridge is interrupted. The adapter cooling element can also be mounted coaxially on a wheel axle between the wheel rim and the brake pot of a brake disk attached to the wheel hub. According to the invention, the adapter cooling element is designed in the form of an adapter cooling element with a cooling arrangement arranged on the circumference. The braking energy in the form of heat is reduced by means of the adapter cooling element. As a result, less heat is introduced into a wheel rim mounted thereon, as a result of which less heat is input into the wheel rim. In particular when using CFRP rims, the rim temperature should be limited to a maximum of 300 ° C, which is ensured with such an adapter cooling element.

By means of the adapter cooling element, the wheel rim can be decoupled from the brake disc or from the wheel hub with respect to heat transfer. With such an arrangement, the thermal bridge between the wheel rim and the brake pot can be interrupted.

The cooling arrangement is designed in the form of at least two cooling fins or cooling fins extending radially to the wheel axis. The cooling fins are used to dissipate the braking heat.

The adapter cooling element is preferably cup-shaped, the cooling arrangement extending in the direction of the wheel rim. The cooling arrangement particularly preferably has a corresponding contour that is spaced apart from the wheel rim, so that an optimal use of space between the wheel rim and the brake pot is possible. Depending on the available space, different numbers of cooling fins can be used.

The adapter cooling element is preferably formed in one piece and can be mounted in the form of an independent component between the brake disc and wheel rim. In an advantageous embodiment, means for increasing the surface area are provided to increase the cooling capacity.

These means are designed, in particular, in the form of additional bores such that the cooling arrangement in its side surface pointing in the direction of the brake pot has bores which extend into at least one cooling lamella in order to enlarge the surface. These holes are preferably arranged on the circumference. In an advantageous embodiment, the additional holes in the rear two fins are used to enlarge the surface in order to achieve more cooling performance.

For easy assembly, the adapter cooling element has a center hole and

Through holes for receiving wheel bolts, the centering hole being alignable with the centering of the wheel hub. Depending on the material thickness of the contact area, a separate centering can also be provided on the adapter cooling element for contacting a wheel rim.

In an alternative embodiment for the assembly of a wheel rim with a central lock, the adapter cooling element can also be designed in the form of an adapter, the adapter Cooling element here has a cylindrical wheel receptacle with a thread and a plurality of driver pins such that a wheel rim with a central lock, which interacts with the thread of the adapter cooling element, and the driver pin can be fastened to the adapter cooling element and thereby to the wheel hub. The adapter cooling element preferably has an outer centering ring for centering a wheel rim with a quick-release fastener. The driver pins used here are screwed to the adapter cooling element using countersunk screws.

It is also possible to provide the entire rim or at least the inside of the rim and thus the surface of the fiber composite material with a heat protection coating (for example a heat protection lacquer). To ensure good adhesion of the heat protection coating, the surface of the rim (preferably on the inside) can be roughened or roughened and / or porous.

Finally, the wheel rim can be provided with a UV-resistant clear varnish that protects the carbon fiber fabric from UV rays.

The invention is explained in more detail below using an exemplary embodiment and associated drawings, without being limited to these. Show it:

FIG. 1 shows a wheel rim according to the invention in a three-dimensional view,

FIG. 2 shows a rear three-dimensional view of the wheel rim,

FIG. 3 shows a front view of the wheel rim,

FIG. 4 shows a sectional illustration according to FIG. 3,

FIG. 5 shows a detailed view of the screw connection of the annular elements,

FIG. 6 shows a first annular element with rim star,

FIG. 7 shows a second annular element,

FIG. 8 a star element in a three-dimensional view,

FIG. 9 shows a side view of the star element according to FIG. 8,

FIG. 10 shows a side view of the star element with a foam core,

FIG. 11 shows a rear view of the star element according to FIG. 10,

FIG. 12 shows a central locking adapter in a three-dimensional representation,

FIG. 13 the individual elements for mounting on a motor vehicle,

FIG. 14 shows the elements according to FIG. 13 in a rear view,

FIG. 15 an adapter cooling element,

FIG. 16 shows an adapter cooling element according to FIG. 15,

FIG. 17 shows a combination of a wheel rim with a brake disc and an adapter cooling element arranged in between in a front view,

18 shows an adapter cooling element with wheel rim and securing system,

FIG. 19 shows an exploded view of the securing system for the wheel rim,

FIG. 20 shows a longitudinal section of the security system,

FIG. 21 detailed view according to FIG. 20, FIG. 22 shows a side view of the fastening ring and the holding element,

FIG. 23 shows an oblique rear view of the fastening ring and the holding element, FIG. 24 shows a front view of a rim with a rim disk,

FIG. 25 shows a hub element for a rim disk,

Figure 26 is a core of hard foam for a rim disc.

FIG. 27 shows the arrangement of a rim star or a rim disk between two annular areas with two prescription positions,

FIG. 28 shows the arrangement of a rim star or a rim disk between two annular areas with a prescription position.

In Figure 1, a wheel rim according to the invention made of a fiber composite material is shown in a two-part design. The rear view of the wheel rim according to FIG. 1 is shown in FIG. 2. The wheel rim R is designed in the form of a multi-part wheel rim R made of a fiber composite material, the wheel rim R being a front first annular element 1 with a front first

Has rim flange 1 .1 and a second coaxially arranged rear annular element 2 with a rear second rim flange 2.1. The first annular element 1 is designed such that it is connected in one piece to a rim star S or has it. The first annular element 1 has a first radially extending rim flange 1 .1, the second annular element 2 has a second radially extending rim flange 2.1, a tire (not shown) being mountable between the first and second rim flange 1 .1, 2.1 ,

The end face of the first annular element 1 facing away from the rim flange 1 .1 in the form of an outwardly facing first flange 1 .2, and the end face of the second annular element facing away from the rim flange is designed in the form of an outwardly facing second flange 2.2. The first and second flange are screwed together radially on the circumferential side, this preferably being done by means of a screw-nut connection 3.

The rim star S is formed in one piece with the first annular element 1 and, according to the figures, has five spokes 1 .3. However, there can also be more or fewer spokes in

Depending on the desired design. Furthermore, a bore for the valve V is arranged in the first annular element 1.

The wheel rim R according to the exemplary embodiments has a central nut Z or a central lock Z. The wheel rim R is mounted on a wheel hub of a motor vehicle by means of an adapter A 'and fixed on the adapter via a central lock Z. Further

Information about the wheel rim R can be printed on a ring I surrounding the central lock Z.

FIG. 3 shows a frontal view of the wheel rim R according to the invention in a 5-spoke design. The wheel rim R has a central lock Z for mounting on a wheel hub or on an adapter. A sectional illustration of the wheel rim along the sectional axis BB according to FIG. 3 is shown in FIG.

The wheel rim R is formed in two parts such that the rim base is formed from the first annular element 1 with the peripheral outer first rim flange 1.1 and the coaxially arranged inner second annular element 2 with the second peripheral rim flange 2.1 for receiving a tire. The first annular element 1 is formed in one piece with the rim star S. According to the invention, the first and second annular elements 1, 2 are detachably connected to one another on their end faces facing away from the first and second rim flanges 1.1, 2.1, wherein according to the exemplary embodiment the first and second flanges 1.2, 2.2 of the first and second annular elements 1, 2 are connected to one another is screwed radially via a screw connection 3 with a screw and nut to hold.

The rim star S has a central hub element, which is designed as a star element 4, with at least one clamping surface 4.1 and one rim flange 4.2 for mounting on a motor vehicle. The star element 4 is made of a metallic material. To the

Rim star S then and as a support structure of the spoke, a foam core 5 is arranged in each spoke, which extends radially outward in the direction of the rim well. The foam core 5 is encased by the fiber composite material F and is no longer visible after the wheel rim R has been completed. The star element is also encased by the fiber composite material F, the clamping surface 4.1 and the rim flange 4.2 being left out.

The “protruding” of the metallic star element 4 in the area of the clamping area 4.1 and the rim flange 4.2 is intended, since a clamping of the wheel directly on carbon would not provide any useful results or strengths.

FIG. 5 shows a detailed view of the screw connection 3 of the first annular element 1 and the second annular element 2 by means of the first and second flange 1.2, 2.2. The first flange 1.2 has a first contour 1 K, which corresponds to a second contour 2K of the second flange 2.2. The first and second contours 1 K, 2K can be used to center the ring-shaped elements 1, 2 relative to one another before the screw connection.

FIGS. 6 to 14 show the individual parts of the wheel rim R and their combinations.

FIG. 6 shows the first annular element 1 with a rim star formed thereon, only the part formed by the composite fiber material or by the carbon fiber material being shown. The composite fiber material forms the annular element 1 and the spokes 1.3 arranged therein. Both the first rim flange 1 .1 and the rim flange 1.2 are formed from the fiber composite material. In the center is a large recess in which the star element, not shown here, is arranged. The second annular element 2 is also made of a fiber composite material.

According to FIG. 6, the second rim flange 1.1 and the second flange 1 .2 are also formed in one piece with the annular second element 2 in FIG.

The two elements 1, 2 are screwed together using screws, the first and second flange having radial through bores 3.1 lying coaxially to one another. A recess 2.3 is advantageously provided in the flange 2.2 of the annular element 2 for a valve (not shown) or for the tire pressure sensor extending thereon.

In an alternative embodiment, the rim star could be formed on the second annular element 2, so that the first annular element is placed in front of it.

The star element 4 is shown as an individual part in FIG. 8 and in a side view in FIG. 9. It has a central bore for a central lock with a clamping surface 4.1 surrounding it, the clamping surface 4.1 tapering conically in the direction of the rim flange 4.2. The star element 4 has at least three, in the exemplary embodiment shown five trained spoke elements 4.3, which extend in the form of double webs from the central bore in the direction of the annular element 1, not shown. A recess 4.4, into which the foam core engages, is arranged between two spoke elements 4.3 designed to form a double web.

An arrangement of the star element 4 with foam cores 5 extending thereon and an adapter A ′ with associated closure V is shown in FIGS. 10 and 11. The star element 4 has five formed spoke elements 4.3, which extend in the form of double webs from the closure in the direction of the annular element 1, not shown. A recess 4.4 is arranged between two spoke elements 4.3 designed to form a double web, into which the foam core 5 engages with a corresponding contour 5.1.

Each individual foam core 5 has a contour 5.2 at its end facing away from the central closure Z, which at least preforms a transition of the spoke into the annular element, so that there is a uniform transition of the fiber composite material in the region of the spoke to the rim well.

The star element 4 forms the rim star S with the foam elements 5 and the fiber composite material arranged around these two elements.

FIG. 12 shows an adapter A ′ for mounting a wheel rim with a central lock receptacle on a wheel hub with a 5-hole receptacle. The adapter A 'has a cylindrical wheel holder A1 for holding the wheel rim with a central lock, the cylindrical one

Wheel holder A1 has a thread, not shown, for the central locking nut. The adapter is preferably designed with a left-hand or right-hand thread depending on the vehicle side and the direction of travel. The adapters that are mounted on the left in the direction of travel are provided with a right-hand thread and the adapters that are mounted on the right with a left-hand thread. This ensures in addition to the fuse unit

that the central nut of the central lock acts or can act counter to the direction of rotation.

Furthermore, the adapter A 'is arranged coaxially to the cylindrical wheel receptacle

Bores, whereby the assembly on the wheel hub by means of wheel bolts in five holes A2 provided for this purpose. The bores A2 are preferably conical in accordance with the wheel bolts and have a depth such that the wheel bolts can be completely countersunk in the adapter A '. The bolt circle of the bores A2 of the adapter corresponds to the bolt circle of the wheel hub of the motor vehicle.

Between the bores A2 of the wheel bolts, bores A3 are also provided for inserting driver pins M, which preclude the wheel rim from rotating on the adapter A '. Furthermore, a circumferential phase A4 is provided on the end face of the cylindrical wheel holder A1 of the adapter for easier assembly of the wheel rim.

The adapter A 'also has an outer centering ring A5 for centering a wheel rim with a quick-release fastener made of a fiber composite material, the star element enclosing the centering ring.

FIGS. 13 and 14 show the connection of the star element 4 to a wheel hub (not shown) via an adapter A '. The star element 4, which forms the center and the clamping area of the wheel rim, is secured against rotation on the adapter A ′ by means of driving pins M arranged in parallel. For this purpose, five holes 4.5 are provided on the back in the star element 4, into which the driver pins M engage.

The ring I with the information relating to the manufacturer, the dimensions and other data is arranged coaxially on the star element 4 arranged on the adapter A 'on the cylindrical wheel mount part A1. In the following, the star element 4 is clamped in the area of the clamping surface 4.1 by means of the central lock Z and fixed to the adapter A '.

For a simplified illustration, a cover D is shown in FIGS. 1, 3, 4, 13 and 14

Final element shown.

FIG. 15 shows an adapter in the form of the adapter cooling element A according to the invention. The adapter cooling element A is mounted instead of the adapter A 'and has the same elements as the adapter A'. The adapter cooling element A has a central cylindrical wheel holder A1 with a thread A1.1 and a plurality of driver pins M. The driver pins M are designed in the form of cylindrical sleeves and around the cylindrical wheel holder A1 of the adapter Cooling element A arranged coaxially. On the circumference of the adapter cooling element A, the cooling arrangement A6 is provided, which is designed in the form of radially extending cooling fins A6.1 and is arranged in the direction of the brake of the vehicle. The centering ring A5 for centering the wheel rim is arranged in front of the cooling arrangement A6 in the direction of the wheel rim. The wheel rim can interact with a thread A1.1 of the adapter cooling element A.

Central lock and driver pin M mounted on the adapter cooling element A are fastened to the adapter cooling element A. The connection to the wheel hub is made by means of the screws 6. The screws 6 are preferably arranged so that they can be countersunk in the bores A2, so that a wheel rim can be arranged above them. The driver pins M are only in areas

Bores A3 embedded in the adapter cooling element A and screwed to it by means of countersunk screws 7. The driver pins M serve for the non-positive connection between the adapter cooling element A, which is connected to the drive, and the wheel rim R. The adapter cooling element A has a centering hole A7 for positioning on a wheel hub.

A plurality of cooling fins A6.1 are preferably provided in the direction of the longitudinal axis of the adapter cooling element A, which is not designated here.

This can be, for example, 6 to 20 cooling fins A6.1, which are spaced apart by a distance of, for example, 1 to 4 mm, in particular 2-3 mm.

Via the adapter cooling element, the heat input from the brake disc via the wheel hub to the rim is prevented or weakened (decoupled). This thermal decoupling prevents excessive heating of the wheel rim (e.g. during braking).

By reducing the height of the adapter cooling element A, for example by milling in the area of the cooling fins, the height of the adapter cooling element can be adapted to a smaller rim width.

FIG. 16 shows, in addition to FIG. 15, a rear view of the adapter cooling element A. The cooling arrangement A6 has, on its side surfaces A6.2 pointing in the direction of the brake pot (not shown), surface enlargements A6.3 in the form of which extend into the cooling fins A6.1 Bores and depressions, which serve to enlarge the surface and thus better heat dissipation.

FIG. 17 shows a combination of a wheel rim R with a brake disk (not designated) and the adapter cooling element 1 arranged therebetween according to one of the preceding figures. The wheel rim R is connected according to FIG. 17 by means of a central lock Z via the adapter cooling element A to a wheel hub, not shown, which is arranged behind the brake disc. Depending on the rim design, the adapter cooling element A can be visible or invisible from the outside. In FIG. 18, an adapter cooling element A is connected in a sectional illustration to a wheel rim R by means of a central lock Z, the cooling arrangement A6 having a corresponding contour A8 spaced apart from the wheel rim R, which enables optimal use of the available space. According to FIG. 18, the adapter cooling element A has a cylindrical wheel holder A1 with a thread A1.1 and a plurality of driver pins M. The wheel rim R is with a cooperating with the thread A1.1 of the adapter cooling element A.

Central lock Z and driver pin M mounted on the adapter cooling element A are fastened to the adapter cooling element A. The adapter cooling element A is connected to a wheel hub by screws 6, which are only indicated here by way of example. The screws 6 are preferably designed in the form of tapered collar screws or spherical collar screws. The adapter cooling element A preferably has a corresponding shape for receiving the screws 6 such that the screw head can be countersunk in a recess in the adapter cooling element A. The screws 6 can also be designed in the form of the wheel screws provided by the vehicle.

The adapter cooling element A also serves as a possible widening of the track

Motor vehicle, wherein depending on the desired widening of the track area is wider or less wide. Furthermore, the number of cooling fins can vary depending on the width of the adapter cooling element in order to achieve optimal heat dissipation.

The wheel rim according to FIG. 18 is secured against loss by means of a securing system B according to FIGS. 19 to 23, the securing system B being installed instead of the cover D.

A safety system B for a wheel rim belonging to the rim system is shown in FIG. 19. The wheel rim, not shown here, is mounted by means of a central nut Z on a cylindrical wheel holder A1 on a wheel hub by means of the adapter cooling element A. The wheel receptacle A1 has an external thread A1 .1 on its circumference, with which the central nut Z can be brought into engagement after the wheel rim has been fitted. The central nut Z exerts a force on a conical area of the wheel rim, so that a force transmission takes place.

However, this screw connection can come loose, so that a securing of the central nut Z is necessary. The central nut Z is secured by means of a fastening ring B1 with a holding element B2 fitted thereon.

The mounting ring is mounted here on the wheel holder A1 using five form elements B1.1. However, an embodiment with at least two shaped elements B1.1 is also conceivable. The

Shaped elements B1 .1 are designed to be deflectable, this being able to be implemented via a joint or an elastic deformation. The deflection of the shaped elements B1.1 is by means of the

Fastening ring B1 arranged holding element B2 blocked, whereby the fastening ring B1 is securely fixed. The holding element B2 has a lid-shaped design and closes the space formed by the fastening ring B1 in the interior of the fastening ring B1. The individual components of the security system are arranged coaxially along an axis C. The axis C is arranged coaxially to the wheel axis of the vehicle.

Figure 20 shows the arrangement of the security system in a sectional view. FIG. 21 shows the security system according to FIG. 20 in a detailed view.

The cylindrical wheel holder A1.1 is formed on the adapter element A.

The wheel receptacle A1.1 has on its cylindrical inner wall A1.1.1 a diameter widening A1.1.2 spaced from the end face A1 .1 2a of the wheel receptacle A1 .1 with a contact surface A1 .1 2a into which the fastening ring B1 with shaped elements B1 arranged thereon .1 using

Active elements B1.2 intervenes. The active element B1 .2 is designed in the form of a hook-shaped elevation and engages in the diameter extension A1 .1.2 and fixes the fastening ring B1 to the wheel holder A1.1. There is a positive connection between the fastening ring B2 and the contact surface A1.1 2a of the wheel holder A1.1. The fastening ring B1 has a circumferential ring surface B1.3, which bears against a contact surface Z1 of the central nut Z facing away from the wheel rim.

The shaped elements B1.1 are designed to be deflectable, one being via a joint B1.4

The pivoting movement is implemented in such a way that the working element B1 .2 undergoes approximately a radial displacement and can thus be moved out of the diameter widening A1.1.2. The deflection of the shaped elements B1.1 is blocked by means of the holding element B2 arranged on the fastening ring B1, as a result of which the fastening ring B1 is securely fixed.

The hinge B1.4 is designed in the form of a dowel pin, the dowel pin being mounted with a first end at a first bearing point B1 .5 and with a second end at a second bearing point B1.6 of the fastening ring B1. The pivotable molded element B1 .1 is positioned between the first and second bearing points B1.5, B1.6 of the fastening ring B1.

According to the figures, the holding element B1 has in the area of each molded element B1 .1 a clip element B2.1 which engages on the inner side B1.7 of the molded elements in the direction of the wheel axis C, by means of which a deflection of the molded elements B1 .1 can be prevented , The clip element B2.1 is preferably designed to be elastically resilient and can thus be easily inserted and removed. In the end region of the clip element B2.1, this has a thickening which engages behind the shaped element B1.1 and thus prevents the holding element B2 from falling out.

For a simplified assembly and disassembly of the fastening ring B1, the molded elements B1 .1 have on their outward-facing side a recess B1.8 in which a circumferential circlip B3 connecting the molded elements B1 .1 is arranged. The snap ring B3 acts in the form of a prestressing force on the shaped elements B1.1 in the direction of the wheel hub in such a way that the Form elements are deflected in the direction of the wheel hub when the holding element B2 is not mounted. The fastening ring B1 can be easily removed and inserted when the holding element B2 is removed. The holding element B2 exerts a force directed against the snap ring B3 on the

Shaped elements B1.1, so that the shaped elements B1 .1 and their active elements B1.2 are pivoted radially outward, as a result of which a positive fit is generated between the contact surface A1.1 2a of the diameter widening A1.1.2 and the active elements B1.2.

FIGS. 22 and 23 show two further views of the fastening ring B1 with the associated holding element B2 in an unassembled state. Figure 22 shows a side view of the

Fastening ring B1 and the holding element B2, Figure 23 shows an oblique rear view. The fastening ring B1 has shaped elements B1.1 with active elements B1.2 arranged thereon, the active elements B1.2 being in the form of a hook-shaped elevation.

The shaped element B1.1 is designed to be pivotable about the joint B1.4. The hinge B1 .4 is designed in the form of a dowel pin, the dowel pin being mounted with a first end at a first bearing point B1 .5 and with a second end at a second bearing point B1 .6 of the fastening ring B1. The pivotable shaped element B1.1 is positioned between the first and second bearing points B1 .5, B1 .6 of the fastening ring B1.

According to the number and position of the shaped elements B1.1, the holding element B2 has corresponding clip elements B2.1 which engage on the inside B1 .7 of the shaped elements B1.1. The

Clip elements B2.1 are preferably arranged in a circle on the side pointing in the direction of the fastening ring B1 and spaced from the edge of the holding element B2.

In the end region of the clip element B2.1, this has a thickening which engages behind the shaped element B1.1 and thus prevents the holding element 6 from falling out.

The molded element B1.1 has on the outward-facing side the recess B1.8 in which the snap ring B3 connecting the molded elements B1.1 is arranged. The snap ring B3 acts with a force radially from the outside on the shaped elements B1.1.

For easier removal of the holding element B2, this can have circumferential recesses on the side pointing in the direction of the fastening ring B1 which extend from the edge region of the

Holding element B2 can be reached by means of a tool, so that the holding element B2 can be removed from the fastening ring B1 by means of leverage.

In an embodiment not shown, the holding element can be designed in the form of a screw with an external thread. The retaining ring accordingly has a corresponding internal thread on the inner sides of the shaped elements, into which the holding element can be screwed. In such an embodiment too, the holding element prevents the molded element from pivoting through the holding element. To fix it to the vehicle, first the adapter A with a suitable bolt circle is mounted on the vehicle (wheel bolts available separately or original bolts) and then the entire rim is placed on adapter A and fastened using central nut Z.

FIG. 24 shows a variant of a rim system according to the invention, which in

Essentially as in the aforementioned exemplary embodiments and also has a wheel rim R with several (here five) spoke elements 4.3, the insert parts

Have hard foam (not visible here) and an outer layer made of fiber composite material F, wherein the fiber composite material F extends into the space between the spoke elements 4.3, so that a rim disc S1 is formed with ridges in the area of the spoke elements 4.3.

FIG. 25 shows a hub element in the form of a star element 4 for a rim disk, which has a central through hole (not shown here) and is provided on the circumference with a kind of toothing 4.6 in the form of elevations and depressions.

The associated foam core 5 is disc-shaped according to FIG. 26 and on it

Inner diameter has a contour 5.3, which essentially corresponds to the toothing of the associated star element 4.

The star element 4 and the foam core 5 can thereby interlock and are positioned in an RTM tool between layers of fiber composite material, resin then being injected into the tool.

FIG. 27 schematically shows the arrangement of a rim star S or a rim disk S1 of a wheel rim R between a first and a second annular element 1, 2 with two

Screw positions P1, P2. The first and second annular elements have a radially outwardly facing flange on the sides facing one another (not designated here. The rim star S or the rim disk S1 have two axially spaced, radially outwardly facing flanges made of fiber composite material on their outer diameter.

A flange is screwed in the area of a first screw position P1 to the flange of the first annular element 1 and the second flange of the rim star S or

Rim disc S1 with the flange of the second annular element 2 in the

Screw position P2. The flanges of the rim star 2 or the rim disk 2.1 provided for prescription consist of fiber composite material F, with which the foam core 5 is also encased.

FIG. 28 shows the arrangement of a rim star 2 or a rim disk 2.1 of a wheel rim R between two ring-shaped regions 1, 2 with only one screwing position P1.

The rim star 2 or the rim disk 2.1 also sits between the radially outward-pointing flanges of the first and second ring-shaped regions 1, 3, wherein the unspecified screw connection through the rigid foam (foam core 5). For this purpose, metallic sleeves H for stabilizing the are in the foam core 5 in the area of the screw connections

Screw connections provided. These are embedded as inserts. Here too is the

Foam core 5 coated with fiber composite material F.

In the variants of FIGS. 27 and 28, the first and the second ring element 1, 2 consist only of fiber composite material.

According to an exemplary embodiment, not shown, the rim disk can also be formed in one piece with the first annular element 1 or with the second annular element 2.

The solution according to the invention provides a rim system with which a wheel rim with a hybrid structure is made available, which due to its modular structure

is easily adaptable to different requirements, tire widths and vehicles

In summary, leading advantages compared to the prior art are achieved with the wheel rim according to the invention:

• groundbreaking material of the future,

• Lightweight construction = efficiency = increased performance,

• no complicated geometries due to multiple stress points (see conventional four-, five- and six-hole drilling),

• Centerlock for motor sport character,

• Centerlock for a tidy look,

• Centerlock for material-appropriate construction,

• Multiple parts for an optimal range of products,

• Multiple parts for optimal storage,

• Multiple parts for cost reduction (only new star instead of complete wheel purchase),

• Multiple parts for cost reduction in the event of damage (e.g. instead of curb damage

Complete bike purchase only new star),

• Weight saving = reduction in consumption = less tire load / wear

(7kg lighter than comparable aluminum bike),

• Agility and directional stability, especially when cornering, is significantly improved (significant

Security reserves)

• CFRP as a material is generally considered to be high quality and efficient,

• Passive theft protection, since Centerlock is still exotic and exclusive (on

Black market almost nonexistent),

• With regard to e-mobility, better range through weight reduction of 28kg

with four wheels. The foam core (s) in the rim structure guarantees a lower weight than with conventional rims, which are made from only fiber composite material, since these require a higher material thickness of the fiber material and thus, in particular in the area of the spokes, a very high laminate density and many cuts.

For example, the weight of the rim according to the invention is less than 6kg for a 20 “rim (without adapter).

Through the use of inserts (insert parts) made of hard foam, this is new

Sandwich structure of the rim achieves a high structural strength with less manufacturing effort, since fewer cuts are required.

The fiber composite material is preferably made of laminates in the form of carbon fiber material. The rigid foam, which is particularly resistant to tension and compression, consists for example of PUR, PP, acrylic, acrylate. Furthermore, a fiber-reinforced rigid foam can be used, which has, for example, glass fibers, carbon fibers, aramid fibers, etc.

It is advantageous for the power transmission that the central hub element (star element) has on its outer circumference a star-shaped structure or a tooth structure with which the foam core (s) are in operative connection.

Such wheel rims are used in particular for sporty cars and sports cars or in racing.

LIST OF REFERENCES

centering

1 First annular element A7

First rim flange A8 contour

1 .1

First flange B securing system 1.2

1.3 spoke B1 mounting ring

First contour B1.1 shaped element

1K

ring-shaped element B1.2 active element

2 second

B1 .3 ring surface

2.1 Second rim flange

Second flange B1.4 joint

2.2

B1 .5 First bearing point

2K second contour

Screw connection B1 .6 second bearing point

3 ng

4 Hub element B1 .7 inside

Clamping surface B1 .8 recess

4.1

Rim flange B2 holding element

4.2

B2.1 clip element

4.3 spoke element

B3 snap ring

4.4 recess

Hole D cover

4.5

4.6 toothing H sleeves

5 foam core I ring

Contour M driver pin

5.1

5.2 Contour R wheel rim

Contour S rim star

5.3

6 wheels S1 rim disc

chrauben

7 countersunk screws V valve

Z Central lock / central nut

Adapter Z1 contact surface

A '

A adapter cooling element

A1 cylindrical wheel mount

A1 .1 thread

A1 .1.1 cylindrical inner wall

A1 .1.2 diameter extension

A1 .1.2a contact surface

A2 hole

A3 hole

A4 phase

A5 centering ring

A6 cooling arrangement

A6.1 Cooling fins

A6.2 side surface

A6.3 Surface enlargement

Claims

claims

1. Rim system with central locking

with a wheel rim with a front first rim flange and a rear second rim flange facing the vehicle, and a rim bed extending between them and

o a rim star with several spokes or

o a rim disc

such as

with means for a central mount on a motor vehicle on the inside diameter of the rim star or the rim disk,

characterized,

that the wheel rim is designed in hybrid construction, wherein

the rim star or the rim disc

o has a metallic hub element on the inside diameter,

o one or more radially outwards from the metallic hub element

extending cores made of rigid foam are present and

o wherein the core or cores of hard foam and the metallic hub element are arranged as inserts in a single or multi-layer fiber composite material, the front first and rear second rim flange and the rim base consist of one or more layers of fiber composite material

and that

the means for a central reception of the wheel rim on a motor vehicle are formed on the metallic hub element

or that

Adapter element is screwed, is secured against loss

and or

2. Rim system according to claim 1, characterized in that the wheel rim is formed at least in two parts such that the rim bed made of at least a first annular element made of fiber composite material with a first circumferential rim flange and at least one coaxially arranged second annular element made of fiber composite material with a second circumferential Rim flange is designed to receive a tire,

wherein the first or second annular element is formed in one piece with the rim star or the rim disk or

wherein the rim star or the rim disc is formed separately and is fixed between the first and second rim flange.

3. Rim system according to claim 1 or 2, characterized in that the central

metallic hub element with a central bore and a central mount with a

Clamping surface for a central nut and a rim flange for mounting on one

Has motor vehicle and wherein the wheel rim can be connected to the motor vehicle via the hub element or via an adapter element operatively connected to the hub element, and wherein the metallic hub element on its contact surfaces with the vehicle and / or

Adapter element and / or the central nut of the fiber composite material is left free.

4. Rim system mach one of claims 1 to 3, characterized in that the first annular element has a first end face facing away from the first rim flange and the second annular element has a second end face facing away from the second rim flange, and in that the first and second annular elements on the first and the second end face abut one another and are detachably connected to one another or that the rim star or the rim disk is fastened between the first and the second annular element.

5. Rim system according to one of claims 1 to 4, characterized in that the

End face of the first ring-shaped element facing away from the rim flange is designed in the form of a radially outwardly angled first flange and that the end face of the second annular element facing away from the rim flange is designed in the form of a radially outwardly angled second flange.

6. Rim system according to one of claims 1 to 5, characterized in that the first flange has a first contour pointing in the direction of the second flange and that the second flange has a second contour pointing in the direction of the first flange, corresponding to the first that the first and the second contour can be engaged with one another and the first and second annular elements can thereby be centered relative to one another and that the first and the second flange are screwed together or that the rim star or the rim disk is arranged between the first and second flange of the rim star or the rim disk has a centering contour which corresponds to the first and second contour of the first and second flange and that the first and second flange are screwed to one another with the rim star or the rim disk lying therebetween.

7. Rim system according to claim 6, characterized in that the screw connection is covered by the tire in an assembled state of a tire.

8. Rim system according to one of claims 1 to 7, characterized in that the central metallic hub element (4) has on its outer circumference a plurality of radially outwardly extending projections, wherein

in the case of a rim disk between the projections, at least one insert part

Rigid foam engages

and in the case of a rim star in the area of each spoke of the rim star there is at least one insert made of hard foam which engages between at least two projections of the hub element.

9. Rim system according to one of claims 1 to 8, characterized in that the layers of the fiber composite material are arranged according to their strength and the direction of pull.

10. Rim system according to one of claims 1 to 9, characterized in that the

Fiber composite material made of carbon, aramid, glass fiber or a combination of the aforementioned materials.

11. Rim system according to one of claims 1 to 10, characterized in that an RFID chip is integrated in the wheel rim, with data relating to the rim being stored on the chip.

12. Rim system according to claim 1 to 11, characterized in that the RFID chip can be read out via a reading device in the form of a smartphone or another, in particular mobile, terminal device.

13. Rim system according to one of claims 1 to 12, characterized in that the one- or multi-part wheel rim is produced by means of a regulated RTM process.

14. Security system for a wheel rim according to claim 1, characterized in that a

There is a cylindrical rim receptacle on the adapter element on which the wheel rim is received at its central metallic hub element, and with a central nut which is screwed onto an external thread of the wheel receptacle of the adapter element, the

Wheel receptacle on its cylindrical inner wall has a diameter widened with a contact surface spaced from the end face of the wheel receptacle and that a

Fastening ring with a circumferential ring surface rests on a contact surface of the central nut facing away from the wheel rim and that the fastening ring has at least two deflectable shaped elements with active elements, which at least in some areas correspond to the

Contact surface are in operative connection, the shaped elements being releasably fixable in operative connection by means of a holding element.

15. Security system according to claim 14, characterized in that the shaped elements are pivotally connected to the fastening ring by means of a joint, the joint being in the form of a dowel pin, the dowel pin having a first end at a first Bearing point and is mounted with a second end to a second bearing point of the fastening ring and that the shaped element is arranged between the first and second bearing point of the fastening ring.

16. Security system according to claim 14 or 15, characterized in that the shaped elements have on their outward-facing side a recess in which a circumferential snap ring is arranged, the snap ring exerting a force pointing in the direction of the wheel hub in such a way that the shaped elements in Direction of the wheel hub are deflected, the holding element exerting a force opposing the snap ring when the holding element is mounted, so that the active elements of the shaped elements with the contact surface of the

Extend the diameter in operative connection, the active element being in particular in the form of a radially extending elevations.

17. Security system according to one of claims 14 to 16, characterized in that the holding element can be plugged onto the fastening ring in such a way that the holding element in the region of each molded element has a clip element which engages on the inside of the molded elements which points in the direction of the wheel axis, by means of its a deflection of the

Form elements can be prevented.

18. Security system according to one of claims 14 to 17, characterized in that the shaped elements have an internal thread at least in some areas and that in the

The internal thread of the holding element in the form of a holding screw is inserted in such a way that the shaped elements are fixed in their position and / or that the shaped elements are formed in one piece in an elastic, resilient manner on the fastening ring.

19. Security system according to one of claims 14 to 18, characterized in that the edge region of the shaped elements pointing outward in the direction of the wheel rim is chamfered.

20. Adapter cooling element for a rim system according to claim 1, characterized in that the adapter cooling element coaxially on a wheel axis between a wheel rim and one, on one

Wheel hub attached brake pot of a brake disc is mounted and has a circumferentially arranged cooling arrangement in the direction of the rear rim flange.

21. Adapter cooling element according to claim 20, characterized in that the adapter cooling element has a central cylindrical wheel receptacle with a thread and a plurality of driving pins such that the wheel rim with a, with the thread of the adapter cooling element cooperating central closure and the driving pin on the Adapter cooling element and thereby can be attached to the wheel hub.

22. Adapter cooling element according to claim 20 and 21, characterized in that the

Cooling arrangement in the form of at least two cooling fins extending radially to the wheel axis.

23. Adapter cooling element according to one of claims 20 to 22, characterized in that the

Cooling arrangement has means for increasing the surface area in the form of bores extending into at least one cooling fin.

24. Adapter cooling element according to one of claims 20 to 22, characterized in that the adapter cooling element has a center hole and through holes for screwing wheel bolts or that the adapter cooling element has a center hole and threaded holes for receiving wheel bolts.

25. Adapter cooling element according to claim 24, characterized in that the adapter cooling element has an outer centering ring for centering a wheel rim with a quick release fastener made of a fiber composite material.