Vehicle accessory in the form of a roof box made of composite material, vehicle and process

Abstract

Vehicle accessory (10) in the form of a roof box (10.1) for mounting on a vehicle roof (2.1) of a vehicle (1), comprising a first accessory body (20) with a wall (21) through which at least sectionally a shape of the first accessory body (20) is formed, and a fastening interface (23) for fastening to the vehicle (1), wherein the wall (21) comprises a composite material (40) with at least a first wall material (41) and a second wall material (42), wherein the first wall material (41) comprises a matrix material for stiffening the wall (21), characterized by that the second wall material (42) contains natural fibers, wherein the second wall material (42) is formed by a fabric made of natural fibers, wherein the second wall material (42) is multi-layered, wherein the fastening interface (23) has a load-bearing element (23.1) through which a fastening force can be introduced into the wall (21), wherein the load-bearing element (23.1) is materially bonded to the wall (21) and / or is at least partially locally integrated into the composite material (40).

Description

[0001] The invention relates to a vehicle accessory in the form of a roof box for a vehicle. Furthermore, the invention relates to a vehicle and a method for manufacturing a vehicle accessory.

[0002] Composite materials are known from the state of the art and are used for lightweight vehicle construction. For example, carbon fiber components are known to be used to reduce vehicle weight. Such components are particularly common in the motorsport sector. However, a disadvantage is that the environmental impact of such components could be improved during production and / or disposal. For example, certain production steps require special precautions, without which negative health effects could be expected. Disposal can also be problematic, as incineration can leave residues and / or result in a significantly negative CO2 balance.

[0003] A roof box of this type is known from document DE 10 2017 201 527 A1. Furthermore, the use of natural fibers in molded parts is known from documents DE 199 30 770 A1, DE 102 51 518 A1 and DE 41 19 295 A1.

[0004] It is an object of the present invention to at least partially overcome the aforementioned disadvantages known from the prior art. In particular, it is an object of the present invention to create a more environmentally friendly vehicle accessory that is lightweight and preferably adapted to a user's lifestyle and / or to strength requirements for, in particular, optional use on a vehicle.

[0005] The foregoing problem is solved by a vehicle accessory having the features of claim 1, a vehicle having the features of claim 16, and a method having the features of claim 17. Details of the invention will become apparent from the respective dependent claims, the description, and the drawings. Features and details described in connection with the vehicle accessory and / or the vehicle according to the invention naturally also apply in connection with the method according to the invention, and vice versa, so that the disclosure of the individual aspects of the invention always includes, or allows for, reciprocal reference.

[0006] According to the invention, a vehicle accessory in the form of a roof box for a vehicle is provided. The vehicle accessory comprises a first accessory body. The first accessory body includes a wall, which at least partially forms a shape of the first accessory body. Furthermore, the first accessory body includes a mounting interface for attachment to the vehicle, wherein the wall comprises a composite material with at least a first wall material and a second wall material, the first wall material comprising a matrix material for stiffening the wall. It is further provided that the second wall material comprises natural fibers.

[0007] The term "vehicle accessory" can preferably be understood as a supplementary component for an additional function, such as a roof box for the vehicle. The vehicle accessory is a roof box. Thus, the vehicle accessory can be an external component for the vehicle. It can be designed, for example, as a single component or, in particular, as a connected assembly of individual components forming a functional unit. Therefore, the vehicle accessory can also be referred to as a vehicle accessory or functional accessory unit. The vehicle is preferably a motor vehicle, especially an electric vehicle.

[0008] Preferably, the first accessory body forms an essential part of the shape of the vehicle accessory.

[0009] The wall has a planar extent. Therefore, the first accessory body can preferably be a thin-walled component. The first and / or second wall material has a planar extent, particularly at least in certain areas. Furthermore, the first and / or second wall material can be oriented parallel or substantially parallel to an outer surface of the first accessory body. Preferably, the first and second wall materials extend along the entire wall. The phrase "the wall forms the shape of the first accessory body, at least in certain sections" can be understood to mean that the shape of the first accessory body is defined and / or predetermined by the wall, at least in certain areas or completely. For example, the wall can also be clad on an outer surface of the first accessory body.

[0010] The term composite material can be understood to mean, in particular, a composite material, preferably a fiber-reinforced composite. The matrix material can be a solidified casting material or laminate, especially in the form of a bio-based synthetic resin. Preferably, the bio-based synthetic resin contains carbon of which 50% or more, preferably 60% or more, and particularly preferably 100%, is derived from plants. This can have a particularly positive effect on the CO2 balance, especially in the case of thermal recycling. In particular, the wall can be made at least partially watertight and / or gas-tight by the matrix material. The matrix material thus enables the natural fibers of the second wall material to be held together. The natural fibers are preferably embedded in the matrix material and / or bonded to it in a form-fit and / or material-fit manner.In particular, the wall thickness can be less than or equal to 10 mm, preferably less than or equal to 5 mm, and most preferably between 0.05 mm and 1.6 mm or between 1 mm and 1.6 mm.

[0011] Preferably, the second wall material consists of natural fibers. These natural fibers can include, for example, wood fibers, flax, hemp, jute, ramie, kenaf, sisal, henequen, bamboo, silk, and / or cotton. In particular, the wall can consist at least partially or entirely of the first and second wall materials.

[0012] Preferably, the fastening interface is designed for the reversible and / or manual attachment of the first accessory body to a vehicle part. For example, the fastening interface can be designed for screwing the first accessory body to the vehicle part. Furthermore, it is conceivable that the fastening interface includes a locking mechanism for snapping the vehicle accessory onto the vehicle part. It is also conceivable that the fastening interface includes a quick-release fastener with which the first accessory body can be secured to the vehicle part. According to the invention, the fastening interface can be arranged directly on the wall. This allows the fastening interface to be integrated, in particular, into a functional unit of the accessory body. Thus, despite the composite material, it is possible for a user to independently attach and detach the first accessory body to the vehicle part.This allows the user, for example, to mount the vehicle accessory as needed. The mounting interface can be designed, in particular, for the positive and / or non-positive attachment of the first accessory body to the vehicle. Furthermore, the mounting interface can be designed to allow the user to mount the vehicle accessory to the vehicle. For this purpose, the mounting interface can be accessible to the user, particularly without disassembling and / or damaging the vehicle accessory.

[0013] The use of natural fibers thus results in improved environmental friendliness of the vehicle accessory. For example, the CO2 balance can be improved. Furthermore, if the natural fibers are woven, for instance, they can also be produced in an environmentally friendly manner. This can reduce the energy required for the production of the secondary wall material. At the same time, the natural fibers can significantly improve the strength of the vehicle accessory, enabling it to exhibit strength properties comparable to or even better than those of carbon fiber parts. Natural fibers also offer the advantage of being lightweight, which can positively impact the vehicle's energy consumption. In particular, the vehicle accessory can therefore be designed as a lightweight component.

[0014] Furthermore, in a vehicle accessory according to the invention, it is conceivable that the wall is formed as a closed, circumferential surface and / or as a trough. This allows for a three-dimensional shape of the vehicle accessory. In the case of a trough-like shape, a demolding direction can be particularly advantageous when a three-dimensional body is to be formed. For example, the wall can thus form the first accessory body as a half-shell. In particular, the wall can have a base and a closed, circumferential side surface around the base. The side surface can form an obtuse angle with the base. This can improve demolding in a casting process. Preferably, the first accessory body is a base element of a roof box.

[0015] Furthermore, in a vehicle accessory according to the invention, it is advantageously provided that the second wall material is formed by a woven fabric of natural fibers, wherein the second wall material is multilayered. The second wall material can be arranged in layers, preferably in two or three layers. The layers of the second wall material can extend parallel or substantially parallel to an outer surface of the wall. Furthermore, the second wall material can advantageously be designed as a mat and / or be flexible. It is conceivable that the second wall material is pre-fabricated to be placed in a mold during the molding of the vehicle part, to which the matrix material is added. Furthermore, a woven fabric or nonwoven fabric enables internal cohesion of the natural fibers of the second wall material, which can increase the strength of the wall.

[0016] Furthermore, in a vehicle accessory according to the invention, it can advantageously be provided that the first wall material is at least partially transparent and / or that the wall forms an outer surface of the first accessory body. Due to the transparent nature of the first wall material, the natural fibers of the second wall material can contribute to the appearance of the vehicle accessory, particularly when the wall forms an outer surface of the first accessory body. This allows for a natural appearance of the vehicle accessory, which can advantageously blend into the user's lifestyle. In particular, the first accessory body can be unpainted. Alternatively, it is conceivable that the first accessory body is painted to achieve any desired appearance of the exterior of the vehicle accessory.If the wall forms the outer surface of the first accessory body, this has the further advantage that the wall can protect underlying components and / or objects from environmental conditions. Thus, the wall can, in particular, function as a housing. The composite material has the advantage that, due to the natural fibers, it can provide advantageous tensile strength and flexural strength. Furthermore, the matrix material can advantageously protect the natural fibers from external mechanical and chemical influences. Therefore, for example, it is not necessary to provide additional protection for the accessory body from environmental conditions.

[0017] Furthermore, in a vehicle accessory according to the invention, it is conceivable that the composite material comprises a third wall material formed by reinforcing strands extending along the second wall material, in particular wherein the reinforcing strands extend at least partially across the wall in a grid-like or strip-like pattern and / or wherein the reinforcing strands comprise natural fibers or a metal. The third wall material can, in particular, extend over the entire wall or a section of the wall, especially one to be reinforced. In particular, the third wall material can run parallel or substantially parallel to an outer surface of the wall. Furthermore, the reinforcing strands can be in contact with the second wall material or arranged at a distance from the second wall material and, in particular, be at least partially or completely embedded in the first wall material.For example, the third wall material can be glued or sewn onto the second wall material. Preferably, the reinforcing strands comprise a yarn made of natural fibers. The yarn can be formed from a single, continuous natural fiber or from several natural fibers. The natural fibers can be the same as those found in the second wall material. It is also conceivable that the natural fibers of the second wall material differ from those of the third wall material. Furthermore, it is conceivable that the reinforcing strands are made of a metal, particularly in the form of wires. For example, the reinforcing strands can comprise aluminum. It is also conceivable that the reinforcing strands are designed as stamped parts. The grid-like or strip-like arrangement of the reinforcing strands can improve the tensile and / or flexural strength of the wall.In particular, it is therefore not necessary for the natural fibers of the third wall material to extend across the entire surface of the wall. The concentrated reinforcing strands can still improve the wall's strength, especially when the reinforcing strands are arranged in a grid-like or strip-like pattern. Preferably, the third wall material can be combined and bonded with the first and / or second wall material in a mat-like fashion. In particular, the wall can consist at least partially or entirely of the first, second, and third wall materials. It is conceivable that the reinforcing strands form polygonal, especially quadrilateral, meshes.

[0018] Furthermore, in a vehicle accessory according to the invention, it is conceivable that gaps are formed between the reinforcing strands of the third wall material, which are filled with the first wall material or are at least partially free of the first wall material, preferably such that the reinforcing strands protrude at least partially on an inner surface of the wall, particularly in relation to the first and second wall materials. Preferably, the reinforcing strands can protrude in a rib-like manner on an inner surface of the wall. Thus, the wall in the gaps can preferably have a smaller thickness than at the reinforcing strands. Therefore, if the gaps are at least partially free of the first wall material, the weight of the vehicle accessory can be reduced, particularly while the strength properties of the first accessory body are essentially maintained.The reinforcing strands preferably protrude from the inner wall of the first accessory body. For example, the outer surface of the first accessory body can be smooth and / or flat. This ensures that the appearance of the vehicle accessory is not negatively affected by the gaps and / or the reinforcing strands when the reinforcing strands are located behind the first and / or second wall material when viewed from the outside.

[0019] Furthermore, in a vehicle accessory according to the invention, it can advantageously be provided that an inner wall surface is at least partially or completely covered with a covering material, in particular wherein the covering material is positively, mechanically, and / or materially bonded to the wall surface. The covering material can, for example, comprise a plastic and / or a textile. This allows, for example, the cavities and reinforcing strands to be concealed if the cavities and reinforcing strands are located on the inner wall surface. Furthermore, the covering material on the inner wall surface can provide an additional functional property. The covering material can, for example, be a protective material for the thermal insulation of the first accessory body on the inner wall surface.Furthermore, it is conceivable that the lining material is designed to hold loose objects. For example, the lining material could be non-slip and / or define the interior of a roof box.

[0020] The cladding material can, for example, be glued to the wall. This can result in an advantageous, non-destructive connection with the composite material.

[0021] Furthermore, in a vehicle accessory according to the invention, it is conceivable that a second accessory body can be fixed to or is fixed to the first accessory body, in particular wherein the second accessory body has an additional wall made of the composite material. Preferably, the second accessory body is designed to be complementary to the first accessory body. Advantageously, the second accessory body can be a lid element of the roof box corresponding to the base element. It can be provided that the second accessory body has a circumferential outer edge that can be coupled to a circumferential outer edge of the first accessory body. This allows, for example, a closable interior space to be formed between the first and second accessory bodies. The additional wall is in particular a further wall. Preferably, the additional wall defines at least a section of the shape of the second accessory body.The additional wall can be made of the composite material. This allows the vehicle accessory to be designed with several individual parts, whereby the previously described advantages of the composite material can also be applied to the second accessory part. In particular, the first and second accessory parts are made of the same material. Furthermore, this can result in a cohesive overall appearance that emphasizes the environmentally conscious design of the vehicle accessory. For example, the additional wall could form an outer surface of the second accessory part, preferably if the material of the first wall of the additional wall is at least partially transparent.

[0022] Furthermore, in a vehicle accessory according to the invention, it is conceivable that the wall forms an outer edge of the first accessory body and / or the additional wall forms an outer edge of the second accessory body, particularly wherein the outer edge of the first and / or second accessory body is milled and / or covered. By subsequently treating the outer edge through milling or covering, a high-quality outer edge can thus be created, improving the appearance of the wall. If the composite material is brittle, this can also reduce the risk of injury to a user. For covering the outer edge, a cap element, for example made of plastic or rubber, can be provided to cover the outer edge of the first and / or second accessory body.In particular, the cap element can be pre-tensioned by the locking unit by the locking unit pre-tensioning the second accessory body against the first accessory body in the closed position.

[0023] In a vehicle accessory according to the invention, the fastening interface has a load-bearing element through which a fastening force can be introduced into the wall, wherein the load-bearing element is bonded to the wall and / or at least partially integrated locally into the composite material. The load-bearing element can, for example, be a metal profile, in particular an aluminum profile. For example, the load-bearing element can be designed as a flat body, preferably as a stamped part. This allows the fastening force to be advantageously introduced into the wall. The load-bearing element can, for example, be bonded to the wall. Furthermore, it is conceivable that the load-bearing element is placed in the composite material during the manufacture of the first accessory body. In particular, the load-bearing element can thus be formed integrally with the wall.This can result in advantageous force transmission, so that, particularly if the composite material is brittle, the fastening interface can withstand high loads during operation and / or assembly. The fastening force can be, in particular, a force acting on the fastening interface and / or the wall when attaching the first accessory to the vehicle and / or during vehicle operation. This allows for a local, load-adapted design that is advantageously compatible with the composite material. Furthermore, a lightweight construction of the vehicle accessory can be supported by a locally limited load-bearing element requirement and / or by the use of aluminum profiles.

[0024] Furthermore, a vehicle accessory according to the invention may advantageously include a lockable securing unit for securing the first and / or second accessory body, in particular wherein a coupling element for coupling the securing unit to the first and / or second accessory body is integrated into the wall of the first and / or second accessory body and / or is metallurgically bonded to the wall of the first and / or second accessory body. The lockable securing unit may, in particular, be arranged on the first and / or second accessory body. The lockable securing unit may comprise a mechanical and / or electronic lock. The coupling element may, for example, be a threaded sleeve by which the securing unit is attached or can be attached to the wall or the additional wall.In particular, the coupling element can enable advantageous force transmission when the locking unit is under load. For example, if the vehicle accessory is a roof box, this can prevent unauthorized opening of the roof box. If, for example, the vehicle accessory is a hood, it can also be lockable. Preferably, the locking unit is arranged on the rear side of the vehicle accessory, so that when the vehicle accessory is mounted on the vehicle, the locking unit is located at the rear of the vehicle.

[0025] Furthermore, in a vehicle accessory according to the invention, it can advantageously be provided that the first and second accessory bodies are connected to each other by a joint unit and / or that the second accessory body, in particular by means of the joint unit, can be moved into a closed position in which the second accessory body rests on the first accessory body, in particular flush with the outer surface, and into an open position in which the second accessory body is at least partially or completely lifted away from the first accessory body. Preferably, the second accessory body is pivoted relative to the first accessory body in the open position, in particular about a pivot axis of the joint unit. The joint unit can in particular comprise a hinge.Furthermore, a flush finish between the first and second accessory bodies prevents turbulent airflow from forming in the area between them or at their connection point. This can reduce wind noise while driving. Alternatively, instead of connecting the first and second accessory bodies via the joint unit, the first accessory body can be pivotally mounted to the vehicle part via the joint unit. Preferably, the wall of the first accessory body has a first chamfer, and the additional wall of the second accessory body has a second chamfer. The first and second chamfers can be complementary to each other to allow for a flush finish between the wall and the additional wall. For example, the first and second chamfers can interlock in the closed position.The first slope of the wall can be designed to slope towards the inside of the wall, and the second slope of the additional wall can slope towards the outside. For improved comfort, the joint unit can include one or more gas pressure dampers to dampen the opening and / or closing movement of the second accessory body.

[0026] Within the scope of the invention, a positioning element, particularly a U-shaped one, can be arranged on the wall for the relative positioning of the second accessory body to the first accessory body in the closed position. The positioning element can be arranged directly or indirectly on the wall, preferably attached. For example, the positioning element can be an insert. In particular, the positioning element is designed to center the second accessory body relative to the first accessory body. The U-shaped design of the positioning element can, for example, advantageously enable lateral centering. Furthermore, the U-shape of the positioning element can be open towards a rear side of the vehicle accessory.This allows for flush positioning of the outer edges and / or outer surfaces, particularly outer surfaces, of the first and second accessory bodies in the direction of wind, thereby improving aerodynamic properties. Preferably, the positioning element can be made of or comprise the composite material. Furthermore, it is conceivable that the positioning element comprises a metal, particularly aluminum. The positioning element can also be bonded, particularly by adhesive bonding, to the inner wall of the first accessory body. In addition, it is conceivable that a further positioning element for the relative positioning of the second accessory body to the first accessory body in the closed position is arranged on the secondary wall of the second accessory body, particularly at the rear.

[0027] In a vehicle accessory according to the invention, the positioning element may include a sealant for sealing a gap between the first and second accessory bodies. The sealant may preferably be elastic and contribute to positioning and / or centering the second accessory body relative to the first. For example, the sealant may be made of rubber, silicone, and / or the like. In the closed position, the sealant preferably rests against the second accessory body, particularly against an inner wall of the additional wall. The gap may be, for example, a separation joint. This gap may be formed, for example, circumferentially or in sections circumferentially between the first and second accessory bodies in the closed position. Sealing the gap may reduce the wind resistance of the vehicle accessory.Furthermore, components or objects located behind the seal, e.g., items in a roof box, can be protected from the elements. In the closed position, a shoulder, particularly an arcuate one, of the first accessory body can engage in a recess, particularly an arcuate one, of the second accessory body at the rear. This allows, for example, an advantageous preload to be exerted on the positioning element of the first accessory body and / or the further positioning element of the second accessory body when the locking unit is closed.

[0028] Furthermore, in a vehicle accessory according to the invention, it can advantageously be provided that the joint unit comprises a lever mechanism by which the second accessory body can be completely or substantially completely lifted off the first accessory body, in particular by a combined linear and pivoting movement. The combined linear and pivoting movement can be curved with a variable curvature. Furthermore, the combined linear and pivoting movement can, for example, have a linear component with which the second accessory body can be moved out of the locked position, and a pivoting component with which the angle of the second accessory body relative to the first accessory body can be changed. This allows, for example, the first lifting movement to be at least partially decoupled from a pivoting movement. This, in particular, allows for greater design freedom in the area of ​​a gap between the first and second accessory bodies.Furthermore, this allows for reliable opening with a large access area between the first and second accessory bodies. Additionally, the joint unit can be completely located within an interior space between the first and second accessory bodies in the closed position. Preferably, the lever mechanism has multiple pivot axes. Furthermore, the lever mechanism can be designed such that the second accessory body can be lifted away from the first accessory body towards a front side of the first and second accessory bodies, so that movement from the closed position to the open position occurs at least partially towards the front of the vehicle when the vehicle accessory is mounted on the vehicle.

[0029] In a vehicle accessory according to the invention, the joint unit can be arranged on the front side of the first and second accessory bodies, so that when the vehicle accessory is mounted on the vehicle, the joint unit is located at the front of the vehicle. This front-side arrangement ensures that a wind load acts on the joint unit when the vehicle is moving forward, thus reducing or preventing the risk of the first and second accessory bodies opening unintentionally. At the same time, it allows easy access to the interior if the vehicle accessory is a roof box or a front hood.

[0030] Furthermore, in a vehicle accessory according to the invention, it is conceivable that at least one joint receptacle for attaching the joint unit is arranged on the wall, which is bonded to the wall or at least partially integrated locally into the composite material. The joint receptacle advantageously allows force transmission into the wall during operation or assembly, particularly if the composite material is brittle. The joint receptacle can, for example, comprise an aluminum profile and / or a threaded sleeve. For instance, the joint receptacle can be bonded to the wall to enable a bonded connection. This allows for a load-bearing design of the joint receptacle and ensures a long service life for the vehicle accessory even with frequent opening and closing of the joint.Preferably, the joint receptacle is arranged on an inner surface of the wall.

[0031] Furthermore, in a vehicle accessory according to the invention, it can advantageously be provided that the first accessory body has at least one bicycle holder for fixing at least one part of a bicycle to the first accessory body, in particular wherein the bicycle holder is bonded to the wall or is at least partially locally integrated into the composite material. The bicycle holder can, for example, comprise a wheel mount for receiving a front wheel and / or a frame mount for receiving a bicycle frame. Furthermore, the bicycle holder can comprise an embedding element for softly embedding the bicycle. This allows a bicycle to be easily attached to the vehicle accessory and transported in the vehicle. In particular, if the vehicle accessory is a roof box, this allows a bicycle to be transported gently inside the roof box without damaging any parts of the bicycle.This also allows for a higher vehicle speed, making it achievable and / or tolerable. Furthermore, considering a nature-oriented sport like cycling can support the environmentally conscious impact of the composite material. Additionally, the second accessory body can include at least one bicycle holder for securing a bicycle to it, particularly if the bicycle holder is bonded to the additional wall or at least partially integrated locally into the composite material of the additional wall.

[0032] In a vehicle accessory according to the invention, the accessory is a roof box for mounting on a vehicle roof. The roof box can, in particular, include a storage compartment for carrying items. The roof box can be mounted externally on the vehicle roof. The roof box can be mounted directly or indirectly on the vehicle roof. Preferably, the roof box has an aerodynamic shape, which reduces wind resistance when driving the vehicle. Furthermore, it is conceivable that the roof box has at least one aerodynamic element, in particular in the form of a rear spoiler and / or a rear diffuser. Preferably, the aerodynamic element is integrated into the wall of the first accessory body or into the additional wall of the second accessory body. This can reduce wind resistance and thus reduce wind noise.Especially during outdoor sports excursions, where roof boxes are frequently used, it is desirable to provide components with a natural design so that they blend seamlessly into the user's lifestyle. The use of composite materials thus makes it possible to design an environmentally conscious, lightweight roof box.

[0033] According to the invention, a vehicle is further provided. The vehicle includes at least one vehicle accessory according to the invention in the form of a roof box.

[0034] The vehicle in question may be a motor vehicle, in particular an electric vehicle. Preferably, the vehicle accessory is detachably or permanently connected to a part of the vehicle.

[0035] According to the invention, a method for manufacturing a vehicle accessory according to the invention in the form of a roof box for a vehicle is further provided. The method comprises the following steps: - Providing a first and a second wall material for a wall of a first accessory body of the vehicle accessory, wherein the first wall material comprises a matrix material for stiffening the wall and the second wall material comprises natural fibers, - Positioning the second wall material in a tool element that corresponds, at least partially, to a negative form of the first accessory body, - Completing the first accessory body comprising applying the first wall material to at least the second wall material in the tool element, curing the first wall material so that at least the first and second wall materials form a composite material, and providing a fastening interface for attachment to the vehicle.

[0036] Thus, a method according to the invention offers the same advantages as those already described in detail with reference to a vehicle accessory and / or a vehicle according to the invention. The method is suitable for manufacturing a roof box.

[0037] The negative shape of the tool element allows the wall to define, at least in sections, the shape of the first accessory body once the first wall material has cured. The tool element can comprise a mold, a die, and / or the like. Preferably, the first and second wall materials can be provided separately. The first wall material can be a liquid casting material or a laminate. In its cured state, the first wall material can serve to stiffen the wall. The second wall material can be provided, for example, in layers as a fabric. The tool element can preferably form a pressure chamber, which is preferably bounded by an elastic membrane. A vacuum or a positive pressure can be generated in the pressure chamber.Applying the second wall material can involve inserting it into the pressure chamber until it presses against the elastic membrane. Alternatively, applying the second wall material could involve laminating and / or pressing it together with the first and / or third wall material.

[0038] Preferably, when positioning the second wall material in the tool element, a load-bearing element for the fastening interface, a coupling element for a locking unit, and / or a joint receptacle for a joint unit for connecting the first accessory body to a second accessory body are arranged in the tool element and / or on the second wall material in order to integrate the load-bearing element, the coupling element, and / or the joint receptacle into the wall. The arrangement of the load-bearing element, the coupling element, and / or the joint receptacle can take place before curing, preferably before the application of the first wall material. Additionally or alternatively, it is conceivable that a load-bearing element for the fastening interface, a coupling element for a locking unit, and / or a joint receptacle for a joint unit is attached to the wall after curing, in particular by a material bond.

[0039] Furthermore, a third wall material can be arranged in the tool element before or after the positioning of the second wall material. When the first wall material is applied to the second wall material, at least part of the first wall material is then applied to this third wall material. For example, the third wall material can be joined to the second wall material, particularly by sewing or gluing, before the second and third wall materials are positioned together in the tool element. In particular, the third wall material comprises natural fibers, preferably formed into reinforcing strands. The elastic membrane can, for example, be positioned on the third wall material. Reinforcing strands of the third wall material can then be pressed into the elastic membrane when the first wall material is introduced into the pressure chamber.This leaves the spaces between the reinforcing strands free of the first and second wall materials, which can result in a structured surface. Preferably, when the first wall material is cut, a smooth and / or flat surface of the wall is created, particularly on a side of the wall opposite the third wall material.

[0040] Further advantages and details of the invention will become apparent from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination. The drawings schematically show: Fig. 1 a vehicle according to the invention with a vehicle accessory according to the invention in a first embodiment in the form of a roof box, Fig. 2 a composite material of a wall of the vehicle accessory part in a cross-sectional view, Fig. 3 a top view of the composite material of the wall of the vehicle accessory part from an inside wall surface, Fig. 4 the vehicle accessory in the form of the roof box in a schematic exploded view, Fig. 5a+b Detailed views of the wall of the vehicle accessory part, Fig. 6. A possible design of a wall of the vehicle accessory part, Fig. 7 another possible design of the wall of the vehicle accessory part, Fig. 8 a vehicle with vehicle accessories not included in the invention in further embodiments, Fig. 9 a vehicle accessory not included in the invention in an exemplary embodiment in the form of a seat shell, Fig. 10 a method according to the invention for manufacturing a vehicle accessory part in a schematic representation of method steps, Fig. 11 a vehicle according to the invention with a vehicle accessory according to the invention in a further embodiment in the form of a roof box, and Fig. 12 a detailed view of an outer edge of a wall of a vehicle accessory in a further embodiment.

[0041] In the following description of some embodiments of the invention, the same reference numerals are used for the same technical features even in different embodiments.

[0042] Fig. Figure 1 shows a vehicle 1 according to the invention with a vehicle accessory 10 according to the invention in the form of a roof box 10.1. The vehicle accessory 10 has a first and a second accessory body 20, 30, which are connected to each other via a joint unit 26. In particular, the first accessory body 20 is a base element of the roof box 10.1 and the second accessory body 30 is a lid element of the roof box 10.1. The first accessory body 20 has at least one fastening interface 23 for attaching the vehicle accessory 10 to a vehicle part 2 in the form of a vehicle roof 2.1 of the vehicle 1. Preferably, the first accessory body 20 can have several fastening interfaces 23. In particular, the vehicle accessory 10 can be reversibly attached to the vehicle 1 by means of the fastening interface 23.The first and second accessory bodies 20, 30 are preferably connected to each other by the joint unit 26 such that the second accessory body 30 can be adjusted from a closed position I to an open position II. In closed position I, the second accessory body 30 rests on the first accessory body 20. In open position II, the second accessory body 30 is lifted from the first accessory body 20. For this purpose, the joint unit 26 preferably has a lever mechanism 26.2, which is attached to an inner surface 29 of the first accessory body 20. The lever mechanism 26.2 allows the second accessory body 30 to perform a combined linear and pivoting movement when it is moved from closed position I to open position II. This enables access to the interior of the roof box 10.1.

[0043] The first accessory body 20 has a wall 21 with a planar extent that at least partially defines the shape of the first accessory body 20. In particular, the first accessory body 20 is thus a thin-walled body. The wall 21 further comprises a composite material 40, which is incorporated into the Fig. 2 and Fig. The composite material 40 is shown section by section 3. It comprises at least a first and a second wall material 41, 42. The first wall material 41 comprises a matrix material for stiffening the wall 21, and the second wall material 42 comprises natural fibers. The second wall material 42 can thus improve the tensile, compressive, tear, and / or flexural strength of the wall 21. At the same time, the natural fibers represent a particularly biodegradable component with low weight. For example, the natural fibers of the second wall material 42 can be in the form of a woven fabric. Furthermore, the second wall material 42 can be multilayered. Preferably, two layers of the second wall material 42 can be arranged directly adjacent to one another. The matrix material of the first wall material 41 can, for example, be a solidified cast material or a laminate.The second wall material 42, in particular the fabric of the second wall material 42, can be impregnated with and / or penetrated by the first wall material 41. This results in an advantageous bond of the composite material 40. Furthermore, the composite material 40 comprises a third wall material 43 and reinforcing strands 44, which preferably also consist of natural fibers. For example, the reinforcing strands 44 can be formed from the natural fibers of the third wall material 43, particularly in the form of a yarn. However, it is also conceivable that the reinforcing strands 44 comprise a metal, e.g., aluminum, preferably in the form of wires. This allows the wall 21 to be reinforced without covering the entire surface of the wall 21 with the third wall material 43. Advantageously, the reinforcing strands 44 extend over the wall 21 in a grid-like pattern.In this arrangement, gaps 45 are formed between the reinforcing strands 44, which are preferably at least partially free of the first wall material 41. This allows for weight savings through the gaps 45, while the reinforcing strands 44 still improve the strength properties of the wall 21. Alternatively, the gaps 45 can be filled with the first wall material 41, for example, if even greater component stiffness is desired. Preferably, the reinforcing strands 44 protrude at least partially from the first and second wall materials 41, 42 on an inner wall surface 27 of the wall 21. In particular, an outer wall surface 28 of the wall 21 forms an outer surface 22 of the first accessory body 20. Preferably, the outer wall surface 28 of the wall 21 is flat and / or smooth.This allows the vehicle accessory 10 to have an appealing appearance while simultaneously maintaining the weight advantage of the gaps 45 in a simple manner.

[0044] Additionally or alternatively, the reinforcing strands 44 can be arranged in strips. The reinforcing strands 44 can run parallel or substantially parallel to each other. This allows the spaces 45 to run horizontally or vertically in the wall 21, for example to enable improved strength properties in a specific direction.

[0045] Fig. Figure 4 shows the vehicle accessory 10 in the form of the roof box 10.1 in a schematic exploded view. The wall 21 of the first accessory body 20 is trough-shaped with a closed, circumferential outer edge 20.1. The outer edge 20.1 is preferably milled or covered. This allows the wall 21 to form the outer edge 20.1 and the composite material 40 to extend, in particular, to the outer edge 20.1. The second accessory body 30 also has an additional wall 31, which also comprises the composite material 40 and / or is formed at least partially from the composite material 40. The first and second accessory bodies 20, 30 can be secured to each other in the locking position I by a locking unit 25. Preferably the safety unit 25 is arranged on a rear side 13 of the vehicle accessory part 10, so that the safety unit 25 is oriented towards a vehicle rear 1.2 on the vehicle 1.In particular, the locking unit 25 prevents the second accessory body 30 from being moved into the open position II. This prevents unauthorized access to the interior of the roof box 10.1. Furthermore, the inner wall 27 of the wall 21 of the first accessory body 20 is preferably covered with a lining material 11, so that the lining material 11 forms an inner surface 29 of the first accessory body 20. This allows, for example, the gaps 45 to be visually concealed and / or simplifies the arrangement of items in the roof box 10.1. It is also conceivable that the additional wall 31 is lined on the inside.

[0046] The first accessory body 20 further comprises a joint receptacle 26.1 for receiving and fastening the joint unit 26, a coupling element 25.1 for coupling the locking unit 25 to the wall 21 of the first accessory body 20, and at least one load-bearing element 23.1 of the fastening interface 23 for introducing a fastening force into the wall 21. Preferably, the joint receptacle 26.1, the coupling element 25.1, and / or the load-bearing element 23.1 are materially bonded to the wall 21, for example, by adhesive bonding, or each is locally integrated into the composite material 40 of the wall 21. For example, an aluminum profile for the joint receptacle 26.1, the coupling element 25.1 and / or the load-bearing element 23.1 can each be arranged on the second and / or third wall material 42, 43 during the production of the wall 21 and then combined with the first wall material 41 to form the joint receptacle 26.1, the coupling element 25.1 and / or the load-bearing element 23.1 are integrated into the wall 21. This allows an additional material, such as a metal, for the joint receptacle 26.1, the coupling element 25.1, and / or the load-bearing element 23.1 to be designed to withstand the stresses, while simultaneously minimizing the amount of additional material required. It is conceivable that the second accessory body 30 also has a joint receptacle 26.1, a coupling element 25.1, and / or a load-bearing element 23.1. The joint receptacle 26.1, the coupling element 25.1, and / or the load-bearing element 23.1 of the second accessory body 30 can be integrated into the composite material 40 of the additional wall 31 or be bonded to the additional wall. Preferably, the joint receptacle 26.1 is arranged at least on the inner wall surface 27 of the wall 21 and / or on an inner wall surface 37 of the additional wall 31.Furthermore, a bicycle holder 60 for securing a bicycle to the first and / or second accessory body 20, 30 can be arranged, in particular on the inner wall 27 of wall 21 and / or on the inner wall 37 of the additional wall 31. This allows the bicycle to be transported safely inside the roof box 10.1.

[0047] Furthermore, the first and second accessory bodies 20, 30 are designed to be complementary to each other, so that the interior space between the first and second accessory bodies 20, 30 is closed in the closed position I. Thus, the first and second accessory bodies 20, 30 form, in particular, a housing for the roof box 10.1. Preferably, the outer edge 20.1 and / or the outer wall surface 27 of the wall 21 of the first accessory body 20 and an outer edge 30.1 and / or an outer wall surface 38 of the additional wall 31 of the second accessory body 30 are designed such that the first and second accessory bodies 20, 30 are flush with each other on the outer surface 22 in the closed position I. Preferably, a positioning element 50, in particular a U-shaped one, is arranged on the inner wall surface 27 of the wall 21 for centering the second accessory body 30 relative to the first accessory body 20. [Figure 1 shows...] Fig. 5b The first accessory body 20 and the second accessory body 30 in the closed position I in a schematic partial cross-section. A gap 52 in the form of a separation joint is formed between the first and second accessory bodies 20, 30, which is sealed by a sealant 51 of the positioning element 50. The sealant 51 also contributes to the centering of the first and second accessory bodies 20, 30. The positioning element 50 can be inclined towards the inside 29 of the first accessory body 20, in particular at an angle of approximately 65°, to facilitate the centering process when moving the second accessory body 30 from the open position II to the closed position I. Preferably, the positioning element 50 is U-shaped and open towards the rear side 13 of the vehicle accessory 10. As in Fig. As shown in Figure 5a in a partial side view of the rear side 13, the second accessory body 30 can have a further positioning element 50 in the opening area of ​​the U-shape, so that the interior of the roof box 10.1 is completely or substantially completely sealed in the closed position I. In the closed position I, a, in particular, arcuate, shoulder 21.4 of the first accessory body 20 can engage in a, in particular arcuate, recess 31.2 of the second accessory body 30. This allows, for example, an advantageous preload to be exerted on the positioning element 50 and / or the further positioning element 50 when the locking unit 25 is closed.

[0048] Furthermore, at least one aerodynamic element 32, for example in the form of a rear spoiler or a rear diffuser, is arranged on the second accessory body 30. The aerodynamic element 32 can be part of the additional wall 31. Additionally or alternatively, the first accessory body 20 can have an aerodynamic element 32, in particular as part of the wall 21. Furthermore, the roof box 10.1 can have a teardrop shape, at least on the front 12. This can improve the aerodynamic properties of the roof box 10.1.

[0049] The composite material 40 can advantageously extend over the entire wall 21 of the first accessory body 21, as shown in Fig. Figure 6 is shown schematically. However, it is also conceivable that the composite material 40 extends only over a first wall section 21.2, as shown in Fig. Figure 7 shows that further wall sections 21.3 may be provided which have a different material, e.g. aluminium.

[0050] The Fig. 8 and Fig. Figure 9 shows exemplary embodiments of a vehicle accessory not covered by the invention. Figure 10. According to Fig. 8 The vehicle accessory 10 can be designed, for example, as a hood, tailgate, door panel, exterior mirror, or roof rack of a vehicle 1 according to the invention. The mounting interface 23 allows for easy retrofitting or replacement of existing parts. Furthermore, it is conceivable that the vehicle accessory 10 is designed as a seat shell, as shown in Fig. Figure 9 shows the following. A first accessory body 20 can be provided, which forms a seat surface. Furthermore, a second accessory body 30 can be provided, which forms a backrest. The first and second accessory bodies 20, 30 can be pivotally connected to each other by a joint unit 26. The first accessory body 20 has a wall 21, which is either closed or open, and the second accessory body 30 has an additional wall 31, which is either closed or open. A mounting interface 23 of the first accessory body 20 also allows for easy installation in the interior of the vehicle 1. This enables the seat shell to be lightweight while simultaneously offering high strength.

[0051] Fig. Reference 10 further discloses a method 100 for manufacturing a vehicle accessory 10 for a vehicle 1. The method 100 is suitable for manufacturing the vehicle accessory 10 according to the first embodiment. The method 100 comprises providing 101 a first and a second wall material 42 for a wall 21 of a first accessory body 20 of the vehicle accessory 10. The first wall material 41 comprises a matrix material for stiffening the wall 21. The second wall material 42 comprises natural fibers. Furthermore, the method 100 comprises positioning 102 the second wall material 42 in a tool element that corresponds, at least partially, to a negative mold of the first accessory body 20.

[0052] Furthermore, as part of the process 100, the first accessory body 20 is finished 103. During finishing 103, the first wall material 41 is applied 103.1 to at least the second wall material 42 in the tool element. Subsequently, the first wall material 41 is cured 103.2, so that the first and second wall materials 41, 42 form a composite material 40. Finishing 103 also includes providing 103.3 a fastening interface 23 for attachment to the vehicle 1. The provision 103.3 of the fastening interface 23 can, for example, take place before or after the curing 103.2 of the first wall material 41.

[0053] Fig. Figure 11 shows a vehicle 1 according to the invention with a vehicle accessory 10 according to the invention in the form of a roof box 10.1 in a further embodiment. The roof box 10.1 is essentially designed according to the first embodiment. However, a hinge unit 26 is arranged directly on a front side 12 of the vehicle accessory 10, and thus, in particular, on a front 1.1 of the vehicle 1. This ensures that the roof box 10.1 does not open unintentionally due to wind pressure while the vehicle 1 is moving forward, even at high speeds.

[0054] As in Fig.As shown in a schematic partial cross-section in Figure 12, a further embodiment of a vehicle accessory 10 according to the invention can be provided such that the wall 21 of the first accessory body 20 has a first slope 21.1 and the additional wall 31 of the second accessory body 30 has a second slope 31.1, wherein the first and second slopes 21.1, 31.1 interlock in the locking position I. In particular, the first slope 21.1 of the wall 21 slopes towards the inner surface 27 and the second slope 31.1 of the additional wall 31 slopes towards the outer surface 22. This allows a flush finish of the first and second accessory bodies 20, 30 to be achieved. List of reference symbols 1 vehicle 1.1 Vehicle front 1.2 Vehicle rear 2 Vehicle part 2.1 Vehicle roof 10 vehicle accessories 10.1 Roof box 11. Cladding material 12 Front 13 Rear side 20 first accessory body 20.1 Outer edge 21 Wall 21.1 first slope 21.2 first wall section 21.3 further wall section 22 Outside of 20 23 Mounting interface 23.1 Load-bearing element 25 fuse unit 25.1 Coupling element 26 Joint unit 26.1 Joint view 26.2 Lever gears 27 Inner wall of 21 28 Outer wall of 21 29 Inside of 20 30 second accessory body 30.1 Outer edge 31 Additional wall 31.1 second slope 32 Aerodynamic element 37 Inner wall of 31 38 Outer wall of 31 40 Composite material 41 first wall material 42 second wall material 43 third wall material 44 reinforcement strands 45 space 50 positioning element 51 Sealants 52 gaps 60 bicycle holders I Locking position II Open position

Claims

[1] Vehicle accessory (10) in the form of a roof box (10.1) for mounting on a vehicle roof (2.1) of a vehicle (1), comprising a first accessory body (20) with a wall (21) through which a shape of the first accessory body (20) is formed at least in sections, and a fastening interface (23) for fastening to the vehicle (1), wherein the wall (21) comprises a composite material (40) with at least a first wall material (41) and a second wall material (42), wherein the first wall material (41) comprises a matrix material for stiffening the wall (21), characterized by , that the second wall material (42) comprises natural fibers, wherein the second wall material (42) is formed by a woven fabric made of the natural fibers, wherein the second wall material (42) is formed in multiple layers, wherein the fastening interface (23) has a load-bearing element (23.1) through which a fastening force can be introduced into the wall (21), wherein the load-bearing element (23.1) is integrally connected to the wall (21) and / or is at least partially locally integrated into the composite material (40). [2] Vehicle accessory (10) according to one of claims 1, characterized by that the first wall material (41) is at least partially transparent and / or that the wall (21) forms an outer side (22) of the first accessory body (20). [3] Vehicle accessory (10) according to one of the preceding claims, characterized byin that the composite material (40) has a third wall material (43) which is formed by reinforcing strands (44) which extend along the second wall material (42), in particular wherein the reinforcing strands (44) extend at least in sections in a grid-like or strip-like manner over the wall (21) and / or wherein the reinforcing strands (44) comprise natural fibers or a metal. [4] Vehicle accessory (10) according to one of the preceding claims, characterized by that between the reinforcing strands (44) of the third wall material (43) intermediate spaces (45) are formed, which are filled with the first wall material (41) or which are at least partially free of the first wall material (41), in particular so that the reinforcing strands (44) protrude at least partially on an inner wall side (27) of the wall (21). [5] Vehicle accessory (10) according to one of the preceding claims, characterized bythat an inner wall side (27) of the wall (21) is at least partially covered with a cladding material (28), in particular wherein the cladding material (11) is connected to the wall (21) in a form-fitting, force-fitting and / or material-fitting manner. [6] Vehicle accessory (10) according to one of the preceding claims, characterized by that a second accessory body (30) can be or is fixed to the first accessory body (20), in particular wherein the second accessory body (30) has an additional wall (31) with the composite material (40). [7] Vehicle accessory (10) according to one of the preceding claims, characterized by that an outer edge (20.1) of the first accessory body (20) is formed by the wall (21) and / or an outer edge (30.1) of the second accessory body (30) is formed by the additional wall (31), wherein the outer edge (20.1, 30.1) of the first and / or second accessory body (20, 30) is milled and / or covered. [8] Vehicle accessory (10) according to one of the preceding claims, characterized by that the load-bearing element (23.1) is a metal profile, in particular an aluminum profile. [9] Vehicle accessory (10) according to one of the preceding claims, characterized by that a lockable security unit (25) is provided for securing the first and / or second accessory body (20, 30), in particular wherein a coupling element (25.1) for coupling the security unit (25) to the first and / or second accessory body (20, 30) is integrated into the wall (21) of the first and / or second accessory body (20, 30) and / or is integrally connected to the wall (21) of the first and / or second accessory body (20, 30). [10] Vehicle accessory (10) according to one of the preceding claims, characterized bythat the first and second accessory bodies (20, 30) are connected to one another by a joint unit (26) and / or that the second accessory body (30) can be brought into a closed position (I), in which the second accessory body (30) rests flush on the first accessory body (20), in particular on the outer side (22), and into an open position (II), in which the second accessory body (30) is lifted off the first accessory body (20) at least in some areas. [11] Vehicle accessory (10) according to one of the preceding claims, characterized by that a positioning element (50), in particular a U-shaped one, is arranged on the wall (21) for positioning the second accessory body (30) relative to the first accessory body (20) in the closed position (I). [12] Vehicle accessory (10) according to one of the preceding claims, characterized bythat the positioning element (50) has a sealing means (51) for sealing a gap (52) between the first and second accessory bodies (20, 30). [13] Vehicle accessory (10) according to one of the preceding claims, characterized by that the joint unit (26) comprises a lever mechanism (26.2) by means of which the second accessory body (30) can be completely lifted off the first accessory body (20), in particular by means of a combined linear and pivoting movement. [14] Vehicle accessory (10) according to one of the preceding claims, characterized by that at least one joint receptacle (26.1) for fastening the joint unit (26) is arranged on the wall (21), which joint receptacle is materially connected to the wall (21) or is at least partially locally integrated into the composite material (40). [15] Vehicle accessory according to one of the preceding claims, characterized byin that the first accessory body (20) has at least one bicycle holder (60) for fixing at least part of a bicycle to the first accessory body (20), in particular wherein the bicycle holder (60) is integrally connected to the wall (21) or is at least partially locally integrated into the composite material (40). [16] Vehicle (1) comprising at least one vehicle accessory (10) according to one of the preceding claims. [17] Method (100) for producing a vehicle accessory (10) according to one of claims 1 to 15 for a vehicle (1), comprising the following steps: - Providing (101) a first and a second wall material (42) for a wall (21) of a first accessory body (20) of the vehicle accessory part (10), wherein the first wall material (41) comprises a matrix material for stiffening the wall (21) and the second wall material (42) comprises natural fibers, - positioning (102) the second wall material (42) in a tool element which corresponds at least in sections to a negative form of the first accessory body (20), - Completion (103) of the first accessory body (20) comprising applying (103.1) the first wall material (41) to at least the second wall material (42) in the tool element, curing (103.2) the first wall material (41) such that at least the first and second wall materials (41, 42) form a composite material (40), and providing (103.3) a fastening interface (23) for fastening to the vehicle (1).

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