DE202020104533U1 - Chassis for a mobile home or motor home - Google Patents

Abstract

Chassis for a mobile home or motorhome, comprising longitudinal (10) and / or transverse members (11) arranged behind a power end (13) and a ladder frame (7), characterized in that
- The longitudinal beams (10) are designed as profile beams which are spaced from the ladder frame (7) at a height (15);
- The cross beams (11) are designed as profile beams, which are spaced from the ladder frame (7) at a height (15) and / or stand perpendicular to the ladder frame (7);
- The lead frame (7) has in its intermediate areas (8) and / or on its carriers surface elements, preferably panels (9), and / or rod elements for reinforcement.

Description

The invention relates to a chassis for a mobile home or motor home. The chassis has longitudinal and transverse beams and a ladder frame. The longitudinal beams are designed as profiled beams spaced one height apart from the ladder frame. In contrast, the cross members are designed as profile carriers spaced one height apart from the ladder frame and / or as profile carriers standing vertically on the lead frame. The lead frame has surface elements, preferably panels, and / or rod elements for reinforcement in its intermediate regions and / or on its carriers.

In addition, the invention relates to a mobile home or motorhome which comprises a chassis of the type mentioned at the beginning.

Background and prior art

There are different types of mobile homes available on the market, currently these are mainly alcove mobile homes, partially integrated mobile homes, (fully) integrated mobile homes, liners and / or panel vans. All but the panel van have in common that manufacturers of mobile homes purchase the chassis with the driver's cab or just the chassis and then add a structure / attachment that is useful for leisure, holiday, camping, etc. The entire structure is rarely taken over by a vehicle manufacturer.

In the case of the above-mentioned vehicle types, the body is primarily made of a timber framework, aluminum sandwich and / or GRP monocoque. The materials used are usually a material mix of XPS foams, EPS foams, PU foams, etc., which are built into a sandwich with panels made of glass fiber reinforced plastic (GRP) and / or aluminum or wood or other materials.

This structure is inexpensive and has good resistance to the effects of the weather. However, due to the design, it offers the occupants little or no protection from the consequences of a possible accident, since the design has no or only inadequate mechanical properties. In the past, it was assumed that measures to increase stability and / or safety are costly and complex and increase the weight of the vehicles enormously.

In particular, the load-bearing parts of the vehicles, the chassis, do not meet today's requirements for occupant protection behind the B-pillar construction of a mobile home or motorhome with the construction methods described. In the event of a side impact or a rollover of the vehicle, constructions from the prior art lead to serious damage, which can result in considerable personal injury if occupants are in the rear area - in the body.

Object of the invention

The object of the invention is thus to eliminate the disadvantages of the prior art and, in particular, to provide a chassis for a mobile home or motor home which enormously improves the safety of the vehicle without (significantly) increasing the vehicle weight. The manufacturing costs and / or retrofitting costs should also be kept as low as possible.

Summary of the invention

The object according to the invention is achieved by the features of the independent claims. Advantageous embodiments of the invention are described in the dependent claims.

• - die Längsträger als Profilträger ausgestaltet sind, die in einer Höhe vom Leiterrahmen beabstandet sind;
• - die Querträger als Profilträger ausgestaltet sind, die die in einer Höhe vom Leiterrahmen beabstandet sind und/oder senkrecht auf dem Leiterrahmen stehen;
• - der Leiterrahmen in seinen Zwischenbereichen und/oder an seinen Trägern Flächenelemente, bevorzugt Paneele, und/oder Stabelemente zur Verstärkung aufweist.

In a preferred embodiment, the invention relates to a chassis for a mobile home or motorhome, comprising longitudinal and cross members arranged behind a power end, and a ladder frame, characterized in that

• - The longitudinal beams are designed as profile beams, which are spaced at a height from the ladder frame;
• - The cross beams are designed as profile beams which are spaced at a height from the ladder frame and / or stand perpendicular to the ladder frame;
• - The lead frame has surface elements, preferably panels, and / or rod elements for reinforcement in its intermediate areas and / or on its carriers.

The preferred chassis is to be regarded as an extension with significant advantages over the constructions for superstructures described from the prior art. In addition to a lead frame, the chassis according to the invention comprises longitudinal and cross members. The preferred longitudinal and transverse members can advantageously absorb a particularly large amount of energy (or forces) in the event of an impact and, moreover, are of very low weight due to their design.

Known power cars from the state of the art for mobile homes and motorhomes meet the highest demands on safety standards due to the many years of development of the automobile manufacturers. For this reason, there is no need to improve the crash structure in this area. Rather, the safety for occupants in the living cabin of a mobile home or motorhome, which is arranged behind the power end (the driver's cab), so that the vehicle occupants are protected in this area, especially in the event of a side impact or rollover of the vehicle. In particular, the preferred longitudinal and cross members of the chassis according to the invention, which are located behind the power end at a distance from the ladder frame, enable such protection. The carriers are placed especially at the height of the seating (especially in the head area of the occupants) of the living cabin, so that the occupants located there experience a particularly high level of protection. In the event of a crash, the longitudinal and transverse members advantageously absorb high proportions of the energy without deforming to a large extent due to their rigidity. Preferred heights at which the longitudinal and cross members are positioned are explained in the further course of the present document.

In a preferred embodiment, the chassis is characterized in that the longitudinal and transverse beams comprise a hybrid fabric and / or scrim. It has been shown that the preferred hybrid fabric gives the longitudinal and cross members a surprisingly high level of stability, this only entailing an extremely small increase in the weight of the longitudinal and cross members.

In addition to the advantageous properties of longitudinal and transverse members, the reinforcement of the lead frame of the chassis with surface elements and / or bar elements in intermediate areas, which is preferred in the context of the invention, also leads to advantageous stability properties. The surface elements are preferably to be viewed as panels and, due to their design, also prove to be very light - like the bar elements.

In the context of the invention, a rod element is preferably designed as an elongated straight component. Bar elements are preferably selected from the group comprising: solid profiles, hollow profiles, C-profiles, T-profiles, U-profiles, Z-profiles, round tubes, beams. In a further preferred embodiment, rod elements can be designed from a combination of several interconnected components. For example, the rod elements can comprise spring systems or damper systems, which can particularly advantageously absorb energy in the event of a collision / accident. However, the length of all connected / connected components is significantly greater than the width of the components.

Different requirements are placed on the surface elements and bar elements. On the one hand, they should have the highest possible rigidity so that they can absorb external mechanical forces in the assembled state, possibly even become a load-bearing part of the chassis and thereby increase the rigidity of the chassis. On the other hand, some of the surface elements and rod elements should preferably be comparatively flexible in order to serve, for example, as impact surfaces for a vehicle occupant in the event of an accident.

In a further preferred embodiment, the rod elements are made from a material from the group comprising: plastic, steel, aluminum, magnesium, titanium. Furthermore, configurations are also possible in which these materials are reinforced with fibers. Furthermore, the rod elements can also comprise materials which consist of a composite comprising one of the materials described in this paragraph. Fiber-reinforced composites are also possible.

In a further preferred embodiment, the chassis is therefore characterized in that the rod elements are made from a composite material and / or have fiber reinforcement.

In a further preferred embodiment, the rod elements comprise hybrid fabrics and / or scrims. This advantageously increased in particular the rigidity and stability of the rod elements.

For the purposes of the invention, a surface element is preferably a three-dimensional object which is very much larger in its width and / or length than its thickness. For example, surface elements are plates or panels.

In a preferred embodiment of the surface elements, these have a thickness of preferably up to 0.5 meters, more preferably up to 0.2 meters, particularly preferably 0.1 meters and in particular up to 0.05 meters. The described thicknesses of the surface elements make it possible to use small amounts of material while still maintaining a high degree of rigidity.

In a further preferred embodiment, a surface element has a width and / or length of 0.0001 meters to 6 meters, more preferably from 0.1 meters to 3 meters, particularly preferably 0.2 meters to 1.5 meters and in particular 0, 4 meters to 1 meter. The selected widths and lengths, in particular 0.4 meters to 1 meter, simplify mounting on a ladder frame. On the other hand, surface elements up to 6 meters long or wide are of particular advantage for the rigidity and stability of the chassis, as they can be attached continuously over the entire length of a ladder frame and in contrast to "smaller" surface elements that are strung together do not have any weak points caused by transitions between two surface elements.

The surface elements and / or rod elements are preferably arranged to prevent buckling of the supports in the lead frame in the event of a crash, i.e. to avoid, for example, in the event of a collision between the vehicle and an opponent. They are therefore advantageously used to reinforce the lead frame. The carriers are fixed in a defined orientation by the surface elements and / or rod elements. Since the carrier and the surface elements and / or rod elements stabilize one another, sufficient energy can be dissipated in the event of a crash even with an oblique force introduction, that is to say a force introduction inclined to the longitudinal direction of the carrier. The surface elements and / or rod elements are primarily intended to stabilize the carrier. It prevents the carriers from buckling away solely when subjected to an oblique load, so that the carriers break progressively together with the surface element under such a transverse load.

The chassis according to the invention therefore has particularly advantageous properties with regard to the safety of a mobile home and motorhome without, surprisingly, adversely affecting driving behavior. In addition, the construction of such a chassis is particularly lightweight, so that it particularly preferably fulfills the purpose of a lightweight chassis.

For the purposes of the invention, a longitudinal direction of the chassis is preferably the direction of the main direction of travel of a vehicle comprising the chassis according to the invention. Longitudinal beams are preferably aligned in the longitudinal direction. On the other hand, cross members lie transversely to the side members, i.e. preferably at an angle of about 90 °. Accordingly, cross members are aligned transversely to a main direction of travel. According to the invention, longitudinal and transverse members are preferably not part of the lead frame and are to be regarded as separate components independently of it.

In addition, the longitudinal and transverse beams are preferably not part of a vehicle roof structure either; the longitudinal and transverse beams are particularly preferably positioned between a roof structure and ladder frame.

Terms such as “essentially”, “approximately”, “about”, “approx.” Etc. preferably describe a tolerance range of less than ± 40%, preferably less than ± 20%, particularly preferably less than ± 10%, even more preferably less than ± 5% and in particular less than ± 1% and always include the exact value. “Similar” preferably describes sizes that are approximately the same. “Partly” describes preferably at least 5%, particularly preferably at least 10%, and in particular at least 20%, in some cases at least 40%.

In a further embodiment, cross members are preferably aligned approximately in a vertical (perpendicular) direction in relation to a floor. However, cross members can also be aligned in the horizontal direction in relation to a floor. A floor is preferably the subsurface on which a vehicle, comprising the chassis according to the invention, is located. It is also preferred in an alternative that the floor corresponds to a vehicle floor of the vehicle, comprising the chassis according to the invention. The vehicle floor is preferably defined by the ladder frame, so that a cross member lying perpendicular to a vehicle floor is also aligned perpendicular to the ladder frame. Particularly preferably, the cross members are designed to stand vertically on the leadframe.

In a further preferred embodiment of the invention, the chassis has at least one cross member transversely to the direction of travel. Particularly in accidents with a side impact of the vehicle, horizontally aligned cross members, which usually compensate for smaller crumple or deformation zones on the side, can represent an essentially continuous cross element which converts kinetic energy into tension energy and deformation energy.

In a further preferred embodiment, the chassis has at least one longitudinal member along the direction of travel. It was surprising that not only can the safety of the entire cabin be increased by such a longitudinal member, but also the driving properties are significantly improved, due to a preferably higher rigidity of the chassis and / or the entire vehicle.

In the context of the invention, a height is preferably a direction which is oriented vertically / perpendicularly with respect to a longitudinal axis of the chassis. Furthermore, the height preferably denotes the distance between an object point and a reference line or surface. The reference is preferably for a height of the leadframe of the chassis, the reference preferably being a carrier of the leadframe, more preferably a connecting plane of the upper-side bearing surfaces of the carrier of the leadframe. The supports for the reference of the height are preferably located in an edge area and / or more preferably in an inner area of the lead frame. In an alternative, the vehicle axle, in particular the rear wheel axle, is the reference for a height.

In a further preferred embodiment, the chassis is characterized in that the longitudinal and / or transverse girders are spaced from the lead frame at a height of 0.1 meters to 2 meters. In this context, the reference for the height is preferably the top-side bearing surface of a carrier of the lead frame, in particular a carrier in the inner region of the lead frame. The longitudinal and cross members at the preferred height of 0.1 meters to 2 meters advantageously ensure that the occupants of the motorhome or motorhome are particularly well protected, because the seats and, accordingly, the occupants' bodies are preferably located at this height.

In the context of the invention, the profile supports are designed as elongated hollow bodies (for example pipes). In the outer geometry, the profile supports are preferably round and / or angular. The profiles are preferably selected from materials from the group comprising: plastic (preferably fiber-reinforced plastic), aluminum, steel.

In a further preferred embodiment of the invention, the fiber reinforcement of the plastic with regard to the profiles is selected from the group comprising carbon fibers, aramid fibers and / or glass fibers.

• - wobei die Profile als länglicher Hohlkörper ausgebildet sind und in ihrer Außengeometrie rund und/oder eckig ausgestaltet sind;
• - wobei ein Hohlraum der Profile einen Hartschaum umfasst.

In a further preferred embodiment, the chassis is characterized in that the profiles of the longitudinal and cross members are designed as foamed profiles

• - The profiles are designed as elongated hollow bodies and are round and / or angular in their outer geometry;
• - wherein a cavity of the profiles comprises a hard foam.

The cavity of the profiles here preferably comprises a rigid foam, in particular extruded polystyrene rigid foam (XPS). Foam-filled components not only have excellent damping properties with simultaneous weight reduction, but also have a surprisingly positive effect on the stability of the profiles.

• - eine nach außen gerichtete Fläche aufweisen, die ein Hybridgewebe und/oder - gelege umfasst, und;
• - einen innenliegenden Bereich des Hohlkörpers aufweisen, welcher mit Schaum ausgefüllt ist.

In a further embodiment, the chassis is characterized in that the profile beams or longitudinal and / or transverse beams

• have an outwardly directed surface which comprises a hybrid fabric and / or scrim, and;
• - Have an inner region of the hollow body which is filled with foam.

In a further embodiment, the chassis is characterized in that the foam is XPS foam.

In a preferred embodiment of the chassis, the foamed profiles are preferably designed as cross members, particularly preferably as longitudinal members. In a further alternative according to the invention, the foamed-in profiles are preferably designed both as cross members and as longitudinal members.

(Textile) scrims include in particular one or more layers / layers of fibers in the same or different orientation (unidirectional or multiaxial scrims). The fibers can preferably be connected by threads (also called knitting threads). Structural stretching can be avoided by aligning the fibers in a stretched and / or load-appropriate form. This greatly improves the mechanical properties. The following types of stitch can preferably be used: fringe, offset fringe, tricot, double tricot and / or hexagonal stitch. These scrims are particularly practical to use.

Fabrics, however, preferably comprise woven fibers as in textiles and can e.g. B. have the form of mats and / or fabric tapes.

The fiber orientation or alignment in a scrim is preferably based on the direction of production of the scrim. The direction of production of a scrim preferably defines a 0 ° direction. The fiber orientation of the respective layers of a scrim is arranged as a function of this direction. The orientation of the fiber orientation of the individual layers is indicated with an angle to the production direction.

According to the invention, a multilayer, multiaxial scrim (preferably hybrid scrim), with a fiber orientation of z. B. 90 °, -45 °, 0 °, + 45 ° (four-layer) indirectly produced by standardized biaxial scrims (preferably hybrid scrims), in particular with a fiber orientation of 0 ° and 90 °. The biaxial fabrics are laminated one on top of the other. Two 0 ° / 90 ° scrims laminated on top of one another result in a 0 ° / -45 ° / 90 ° / 45 ° scrim. The person skilled in the art is familiar with the production of further multilayer fabrics (preferably hybrid fabrics) by laminating standardized biaxial hybrid fabrics.

In a preferred embodiment, the chassis, in particular the longitudinal and cross members, comprises a hybrid fabric and / or scrim. This is preferably characterized in that it is made from mixed types of fibers. Are preferred Hybrid fabric and / or scrim made from a mixture comprising carbon fibers and aramid fibers. Hybrid fabrics and / or scrims have particularly advantageous material properties with regard to modulus of elasticity, elongation at break and tensile or compressive strength.

In a further preferred embodiment, the chassis is characterized in that the hybrid fabric and / or scrim comprises 2 to 14, preferably 2 to 9 and in particular 4 to 7 layers, the fiber orientations of the successive layers each at an angle of about 15 ° , 18 °, 30 °, 45 ° or 90 °.

1. i. bevorzugt 1 bis 10, besonders bevorzugt 2 bis 6 und insbesondere 2 Schichten, wobei sich die Faserorientierungen der aufeinanderfolgenden Schichten jeweils um einen Winkel von etwa 90°unterscheiden oder
2. ii. bevorzugt 1 bis 12, besonders bevorzugt 3 bis 9 und insbesondere 3 Schichten umfasst, wobei sich die Faserorientierungen der aufeinanderfolgenden Schichten jeweils um einen Winkel von etwa 45°unterscheiden.

In a preferred embodiment, the hybrid fabric and / or scrim comprises

1. i. preferably 1 to 10, particularly preferably 2 to 6 and especially 2 layers, the fiber orientations of the successive layers differing by an angle of approximately 90 ° or
2. ii. preferably 1 to 12, particularly preferably 3 to 9 and in particular 3 layers, the fiber orientations of the successive layers each differing by an angle of approximately 45 °.

1. i. bevorzugt 2 bis 12, besonders bevorzugt 3 bis 8 und insbesondere 4 Schichten, wobei sich die Faserorientierungen der aufeinanderfolgenden Schichten jeweils um einen Winkel von etwa 30°unterscheiden oder
2. ii. bevorzugt 2 bis 12, besonders bevorzugt 4 bis 8 und insbesondere 6 Schichten, wobei sich die Faserorientierungen der aufeinanderfolgenden Schichten jeweils um einen Winkel von etwa 18°unterscheiden oder
3. iii. bevorzugt 2 bis 14, besonders bevorzugt 4 bis 9 und insbesondere 7 Schichten, wobei sich die Faserorientierungen der aufeinanderfolgenden Schichten jeweils um einen Winkel etwa 15° unterscheiden.

In a further preferred embodiment, the hybrid fabric and / or scrim comprises

1. i. preferably 2 to 12, particularly preferably 3 to 8 and in particular 4 layers, the fiber orientations of the successive layers each differing by an angle of about 30 ° or
2. ii. preferably 2 to 12, particularly preferably 4 to 8 and in particular 6 layers, the fiber orientations of the successive layers each differing by an angle of about 18 ° or
3. iii. preferably 2 to 14, particularly preferably 4 to 9 and in particular 7 layers, the fiber orientations of the successive layers each differing by an angle of about 15 °.

Such a configuration of the hybrid fabric and / or structure advantageously brings about a high level of stability of the longitudinal and transverse beams.

It is clear to the average person skilled in the art that all angles mentioned in this document can have a certain tolerance range. Correspondingly, obvious angles with a deviation of preferably +/- 10 °, particularly preferably +/- 5 ° and more preferably +/- 2 ° from the angles mentioned are also included.

In a further preferred variant, each layer of the hybrid fabric and / or layer has a thickness of approximately 0.3 mm. This saves material in an advantageous manner and is therefore particularly economical.

According to the invention, the longitudinal and transverse beams made of profiles are preferably designed in such a way that a hybrid fabric and / or scrim is preferably attached to the outwardly facing surface of the profiles. This has a beneficial, positive effect on the stability of the profiles.

In a further preferred embodiment, the chassis is characterized in that the lead frame is part of a tractor. A tractor is preferably a motor-driven tractor. In the context of the invention, the tractor preferably comprises a driver's cab (also referred to as a power head), a drive and at least two axles. Conventional structures for motor homes or motor homes are constructed on lead frames associated with tractors, which are sold by large automobile manufacturers. A tractor also preferably comprises a power car and a ladder frame. A ladder frame is also known as a chassis.

A ladder frame is a type of vehicle frame in the automotive industry. Several cross struts are preferably inserted between two strong longitudinal beams, which give it the shape of a ladder. To improve torsional rigidity, lead frames are preferably made from closed profiles. They are then also called box frames

In further preferred configurations, the lead frame is also configured separately from a power end. In these embodiments, the power car is sold separately by automobile manufacturers and supplemented by ladder frames developed in-house, in particular by motorhome manufacturers. In these cases, the ladder frame is initially not part of a tractor, but only after it has been installed with the power car.

In a further preferred embodiment, the longitudinal and cross members are preferably positioned behind the B-pillar of the mobile home or motorhome. The B-pillar is a load-bearing vehicle pillar that preferably connects the roof area (roof and inner side parts) with the chassis substructure (sills, floor) of a vehicle. The vehicle pillars are identified with letters running from front to back - regardless of the side of the vehicle. The average person skilled in the art is sufficiently familiar with the B-pillar of a vehicle.

In a further preferred embodiment, the chassis is characterized in that the tractor comprises a power end, the chassis being arranged behind the B-pillar of the power end.

The B-pillar of the mobile home or motorhome preferably separates the power end from the preferred chassis. The power car and its supporting elements are therefore preferably not included in the preferred chassis.

According to the invention, a panel is preferably defined as a flat element. A panel can have any surface geometry. Panels are preferably designed as polygons, and the panels are particularly preferably designed as rectangles.

In a further preferred embodiment, the surface elements are preferably dropped. For example, the surface elements can be designed as sheet steel folds. Such surface elements are bent using bending processes so that they visually have a sawtooth pattern. The folds give the surface element good damping properties and increased rigidity, so that a particularly large amount of energy can be absorbed by the surface elements in the event of an accident.

In a further preferred embodiment of the invention, the panels are attached in intermediate areas of the lead frame. The intermediate areas are preferably the free areas between carriers of the leadframe. The panels are attached to the beams adjoining the intermediate areas by means of connecting means and preferably fill the intermediate areas over the entire area. The carriers of the lead frame are therefore preferably connected to one another over a large area. In addition to the stability-promoting properties of the panels, they also serve as an aerodynamic lining. From such an arrangement of the panels, it was surprising for the inventors that an advantageously good flow resistance coefficient (drag coefficient [c _w value]) emerged on the underside of the vehicle.

Connection means are preferably selected from the group comprising: screw connections, rivet connections, adhesive connections, nail connections, clamp connections, welded connections, soldered connections.

In a further preferred embodiment, the rod elements are oriented at an angle of 0 ° to 90 °, more preferably at an angle of 0 °, 45 ° or 90 ° with respect to a main direction of travel. Furthermore, a large number of rod elements can be present in the intermediate regions of the lead frame. These are preferably parallel and / or crossed to one another.

In a further preferred embodiment, the rod elements (or just one rod element) are designed continuously without interruptions from a front area, preferably from the B-pillar, to a rear area, preferably the rear axle of the tractor. Such rod elements are attached above and / or below the carrier of the lead frame, wherein they are firmly connected to the carriers of the lead frame.

In a further preferred embodiment, a rod element has a length of 0 meters to about 6 meters, more preferably from about 0.1 meters to about 3 meters, particularly preferably about 0.2 meters to about 1.5 meters and in particular about 0, 4 meters to about 1 meter. The preferred lengths of the rod elements lead to an advantageously ideal compromise between rigidity, assembly and weight.

In a further preferred embodiment, a hybrid fabric and / or scrim is attached to the panels over the entire area and / or encompassed by the panels. This can advantageously increase the stability of the chassis.

In a further preferred embodiment, the chassis is characterized in that the surface elements, preferably panels, have a honeycomb structure made of carbon fiber-reinforced plastic. According to the invention, the honeycomb structure is preferably designed in a so-called sandwich construction and is also known as a honeycomb. The honeycomb structure preferably consists of a honeycomb core and load-bearing outer skins. The cover skins preferably consist of at least one layer of the hybrid fabric and / or scrim and / or can be attached to structural elements of the chassis. The honeycomb core preferably consists of prisms with a hexagonal base made of carbon fiber-reinforced plastic. The base area can, however, also have any other polygon shape (triangle, square, pentagon, heptagon, octagon, hexagon etc.). The prisms are preferably arranged in connection with one another through their outer surfaces and thereby result in the honeycomb structure known to the person skilled in the art. Surprisingly, in addition to the improved stability of the chassis (or, as a result, of the entire vehicle), the thermal insulation of the preferred mobile home or motorhome has also improved.

In a further preferred embodiment of the honeycomb structure, the honeycomb core is attached directly to structural elements of the chassis without cover skins. “Leaving out” the outer skins advantageously saves material and Surprisingly, it continues to meet all the stability criteria of the safety cabin. In a further preferred variant, the honeycomb core is surrounded on one side by a cover skin, the uncovered free side of the honeycomb core being attached to structural elements of the chassis. Structural elements of the chassis are preferably all longitudinal and transverse members as well as the lead frame.

In a further preferred embodiment, a honeycomb structure made of carbon fiber-reinforced plastic is attached to at least one transverse and / or longitudinal carrier and / or to at least one carrier of the leadframe, preferably circumferentially. The surface of the respective carrier is thus designed with the honeycomb structure. The honeycomb structure is preferably attached to the transverse or longitudinal beams without and / or particularly preferably with outer skins.

In a further preferred embodiment of the invention, a honeycomb structure is introduced into the panels on the longitudinal side. The honeycomb structure is preferably contained in the panels without and / or particularly preferably with outer skins.

In a further preferred embodiment, a panel is designed as a honeycomb structure comprising a honeycomb core and cover skins, the surfaces of the panels forming the cover skins and a honeycomb core being present within the panels. The outer skins are preferably made from hybrid fabric and / or scrim.

In a further preferred embodiment, the chassis is characterized in that the lead frame is made of steel and / or aluminum. Aluminum supports have excellent properties in terms of rigidity, so that the ladder frame, which is made of aluminum, achieves very good driving behavior.

In addition, aluminum is very light and durable. Steel, on the other hand, is particularly economical and very easy to recycle. It also has high strength.

In a further preferred embodiment, the chassis is characterized in that the longitudinal and / or cross members and / or carriers of the lead frame are encased in a honeycomb structure made of carbon fiber reinforced plastic. Beams, especially the preferred longitudinal and transverse beams, experience increased stability and rigidity through such a configuration, which means that the overall structure of the chassis can withstand high loads - compared to configurations from the prior art, and also in relation to it to loads that act on the carrier at an unfavorable angle.

In a further preferred embodiment, the chassis is characterized in that the honeycomb structure comprises a honeycomb core and load-bearing cover skins, the cover skins being designed from at least one layer of a hybrid fabric and / or scrim.

In a further preferred embodiment, the chassis is characterized in that at least one longitudinal and / or cross member is firmly connected to the lead frame. It is an essential difference to the devices known from the prior art that, in addition to a lead frame, the chassis contains further longitudinal and cross members, which are in particular firmly connected to the lead frames. This advantageously means that loads which act, for example, due to an impact on a vehicle above the ladder frame, can be absorbed by longitudinal and transverse members arranged there. The forces acting on the side and cross members are also conducted into the ladder frame of the vehicle through the fixed connection to one another, which results in a particularly stable vehicle structure.

In a further preferred embodiment, the chassis is characterized in that the lead frame and a longitudinal and / or cross member are connected to one another via connecting means and / or adapters.

In the context of the invention, an adapter is preferably a technical connection piece which is set up to connect a mechanical connection between different components with different orientations and different geometrical configurations. In a preferred embodiment of an adapter, this is designed to be detachable, so that two components can be reversibly connected and detached to one another.

In a further preferred embodiment, the chassis is characterized in that the lead frame is to be divided into an inner area and an outer edge area, the surface elements, preferably panels, and / or the rod elements being in the intermediate areas of the edge area. The division into two areas advantageously makes it possible to better protect essential areas. The inner region of the lead frame preferably has thicker supports and / or supports with increased strength compared to the outer edge region.

According to the invention, an outer edge area is preferably an area of the chassis which, in the top view of the chassis, starting from an edge (outermost edge of the lead frame) does not extend beyond the central longitudinal axis of the chassis along a transverse direction. The The outer edge region extends preferably starting from an edge up to approximately preferably 0.3 meters, more preferably 0.5 meters, and in particular up to approximately 1 meter in the direction of a central longitudinal axis, along a transverse direction. The larger the edge area, the better the inner area of the chassis is protected by reinforcing elements in the edge area. It has been shown that even with an edge area which extends 0.3 meters in the direction of a centrally located longitudinal axis, the protection of the inner area is sufficient to hold even highly sensitive components (on impact).

The inner area is preferably between two outer edge areas. The inner area of a lead frame is preferably protected in a particularly pronounced manner. Therefore, sensitive vehicle components, in particular components which can cause great damage, fulfill essential functions of the vehicle or are of high value, are preferably placed in the inner area. It is in the nature of things that an inner realm should be protected by an outer realm. Therefore, according to the invention, the outer edge area is preferably reinforced by surface elements in order to protect the inner area as much as possible.

In a further preferred embodiment, the chassis is characterized in that the outer edge region of the lead frame has surface elements, preferably panels, and / or rod elements, along its entire longitudinal direction. Since the entire length of the edge area is designed to be continuous with panels, the chassis has an extremely high level of stability and rigidity along its entire chassis length.

In a further preferred embodiment, the chassis is characterized in that the hybrid fabric and / or scrim comprises a mixed fiber reinforcement made of carbon fibers and aramid fibers.

In a further preferred embodiment, the chassis is characterized in that the fiber reinforcement of the hybrid fabric and / or structure comprises aramid fibers with a weight proportion between 40% and 60% and in particular approximately 50%, with carbon fibers also being included and with the weight proportions refer to the total weight of the fiber reinforcement. With this composition, in particular, it has surprisingly been found that the processing and / or further treatment of the hybrid fabric and / or scrim is made possible in a simple manner. In addition, the material properties in this composition are surprisingly advantageous with an optimum in terms of modulus of elasticity, elongation at break, and tensile or compressive strength.

In a further embodiment, the fiber reinforcement of the hybrid fabric and / or scrim preferably comprises a volume fraction between 40% and 60% and in particular approximately 50% aramid fibers, carbon fibers also being included and the volume proportions relating to the total volume of the fiber reinforcement.

In a further preferred embodiment, the chassis is characterized in that the longitudinal and cross members are arranged in the rear area of the chassis. As a result, the rear area absorbs the impact energy, especially in rear-end collisions (accidents in which a vehicle drives the motorhome or motorhome into the rear) and converts it so that the passengers receive less kinetic impact energy. The passengers preferably sit in the front area of the chassis and / or in the driver's cab.

In a preferred embodiment of the invention, the rear area is preferably to be regarded as an area which extends from a rear of the chassis to a center of the chassis. The middle is preferably half the distance between the rear and the driver's cab or B-pillar.

In a further preferred embodiment, the chassis is characterized in that the longitudinal and cross members are connected to one another and arranged in one plane, the plane being 0.8-1.8 meters in height from the ladder frame. If occupants are seated in the area of the chassis (not in the driver's cab) while driving, the body parts that are sensitive to impacts and vital for survival, such as the head, are located at the preferred height. The longitudinal and transverse members, which are placed at the preferred height, accordingly protect the head area of the occupants in a particularly advantageous manner.

In a further preferred embodiment, the chassis is characterized in that the chassis comprises three longitudinal members and five transverse members. In particular, this number of longitudinal and cross members has proven - quite surprisingly for the inventors - to be a very good ratio between improved stability behavior and additional weight.

In a further preferred embodiment, the chassis is characterized in that an energy storage device, preferably a battery or a gas tank, a heating source and a fresh and waste water tank are attached in the inner area of the lead frame.

In a further preferred embodiment, the invention relates to a mobile home or motorhome comprising a chassis of the type mentioned at the beginning.

In further alternatives, the chassis according to the invention can also be used, for example, for ambulance vehicles and / or transport vehicles. Vehicles which have the chassis according to the invention can ensure both increased safety for occupants and also for transported goods.

In a further preferred embodiment, the invention relates to a mobile home or motorhome comprising a chassis of the type mentioned at the beginning and walls.

In a further preferred embodiment, the mobile home or mobile home is characterized in that at least one wall of the mobile home or mobile home comprises a honeycomb structure made of carbon fiber reinforced plastic and / or hybrid fabric and / or scrim

• - wobei die Längsträger als vom Leiterrahmen in einer Höhe beabstandete Profilträger ausgestaltet sind;
• - wobei die Querträger als vom Leiterrahmen in einer Höhe beabstandete Profilträger und/oder als senkrecht auf dem Leiterrahmen stehende Profilträger ausgestaltet sind;
• - wobei die Längs- und Querträger ein Hybridgewebe und/oder -gelege umfassen.

In a further preferred embodiment, the mobile home or mobile home is characterized in that at least one wall of the mobile home or mobile home comprises an integrated longitudinal and / or cross member

• - wherein the longitudinal beams are configured as profiled beams spaced one height apart from the ladder frame;
• - wherein the transverse beams are designed as profiled beams spaced at a height from the ladder frame and / or as profiled beams standing perpendicularly on the ladder frame;
• - wherein the longitudinal and transverse beams comprise a hybrid fabric and / or scrim.

The essential advantages of the invention in relation to the chassis mentioned at the outset can be transferred in the same way to the mobile home or motorhome according to the invention.

Detailed description

Figure list

• 1 . Representation of a preferred lead frame with attached elements, namely: a battery, a heating source and a fresh and a waste water tank
• 2 Representation of a preferred lead frame comprising panels in the edge area for reinforcement
• 3 Exploded view of a rear area of a preferred mobile home or motorhome
• 4th Side view of a preferred mobile home or motor home
• 5 Representation of a preferred chassis from a front view
• 6th Representation of a preferred chassis from a rear view
• 7th Representation of a preferred chassis from a bottom view
• 8th Honeycomb structure

Detailed description of the figures

1 is a representation of a preferred lead frame 7th with attached elements, namely: a battery 3 , a heating source 6th and a fresh 5 as well as a waste water tank 6th . Such a lead frame 7th is well known from the prior art and is commonly used for mobile homes and motor homes. Automobile manufacturers supply such vehicles as so-called basic vehicles, comprising only one power car 13 and ladder frames 7th (without body), manufacturers for bodies or box bodies. Manufacturers of bodies or box bodies can accordingly attach and sell individual solutions for your body on the base vehicle. The illustrated lead frame 7th is in an inner area 1 and an outer edge area 2 to subdivide. The inner area 1 is designed in particular by thicker ladder frame supports (lengthways and crossways). The inner area 1 is particularly well protected. Inside the inner area 1 are accordingly special and shock-sensitive components such as an energy store 3 : here a battery, a waste water tank 4th , a fresh water tank 5 and a heating source 6th appropriate. The outer edge area 2 of the lead frame 7th includes a variety of intermediate areas 8th , which are configured between different lead frame supports.

2 Figure 3 shows a preferred lead frame 7th comprising panels 9 in the outer edge area for reinforcement. In the particularly protected interior area 1 of the lead frame 7th the following components are preferably attached: Battery 3 , Heating source 6th , Waste water tank 4th and fresh water tank 5 . The outer edge area 2 is also preferred with a variety of panels 9 designed to reinforce the lead frame 7th serve. The panels 7th are along the entire longitudinal axis of the lead frame 7th in the edge areas 2 appropriate.

In the 3 an exploded view of a structure for a preferred mobile home or motorhome is illustrated. In the exploded view, the chassis is spatially separated from the interior fittings of the body and the walls belonging to the body. The preferred chassis has longitudinal 10 and cross members 11 on. In addition, the chassis is made of panels 9 in an edge area 2 of the lead frame 7th designed.

The 4th shows a preferred mobile home or motorhome in a side view. The power car 13 is positioned in a front area of the vehicle, in particular in front of the chassis according to the invention, and is firmly connected to the preferred lead frame 7th . The preferred chassis is covered by side walls of the mobile home or motorhome. The B-pillar 14th of the motorhome or motorhome separates the power car 13 of the living room with the chassis according to the invention.

5 Figure 3 shows a preferred chassis from a front view. The side walls of the mobile home or motorhome surrounding the chassis are only indicated schematically and transparently. The preferred embodiment of the chassis comprises a lead frame 7th , which in an outer edge area 2 with panels 9 is designed. The panels 9 preferably have a honeycomb structure, the honeycomb structure leading to increased rigidity and stability of the leadframe 7th leads. Furthermore, in a rear area of the chassis lying in one plane longitudinal 10 and cross members 11 arranged. The longitudinal 10 and cross members 11 are preferably designed from a hybrid fabric and / or scrim.

6th Fig. 3 is an illustration of a preferred chassis from FIG 5 from a rear view. The longitudinal 10 as well as cross members 11 in the rear of the chassis are three vertically aligned cross members 11 with the ladder frame 7th connected by connecting means. The vertical cross members 11 stand vertically on the ladder frame 7th . The through longitudinal 10 as well as cross members 11 The plane formed is parallel to a rear plane of the lead frame 7th designed and therefore the longitudinal 10 as well as cross members 11 at a height 15th from the ladder frame 7th spaced. The beyond are the edge areas 2 of the lead frame 7th with panels 9 configured, which, however, are not attached over the tires of the vehicle. The longitudinal 10 and cross members 11 are also encased in a honeycomb structure.

7th FIG. 13 is an illustration of a preferred chassis in the embodiments of FIG 5 and 6th from a bottom view. The panels 9 comprising a honeycomb structure are in an outer edge region of the lead frame 7th appropriate.

8th is the representation of a honeycomb structure 18th . The honeycomb structure 18th includes two outer skins 16 which, in the context of the invention, are preferably made of hybrid fabric and / or scrim. There is a honeycomb core between the outer skins 17th arranged. The honeycomb core 17th preferably consists of prisms with a hexagonal base made of carbon fiber reinforced plastic. The prisms are preferably arranged in connection with one another through their outer surfaces. 8a) is the representation of a composite honeycomb structure 18th . 8b) shows the individual comprehensive elements of a honeycomb structure in an exploded view 18th . In preferred versions, only the honeycomb crown is used 17th used to reinforce structural elements of the preferred chassis.

List of reference symbols

1

inner area of the lead frame

2

outer edge area of the lead frame

3

Energy storage

4th

Waste water tank

5

Fresh water tank

6th

Heating source

7th

Ladder frame

8th

Intermediate areas of the lead frame

9

Panels

10

Side member

11

Cross member

12

tractor

13

Power end

14th

B-pillar

15th

height

16

Top layer

17th

Honeycomb core

18th

Honeycomb structure

Claims (31)

Chassis for a motorhome or motorhome comprising longitudinal (10) and / or transverse members (11) arranged behind a power end (13) and a ladder frame (7), characterized in that - the longitudinal members (10) are designed as profile carriers which are from Lead frames (7) are spaced apart at a height (15); - The cross beams (11) are designed as profile beams, which are spaced from the ladder frame (7) at a height (15) and / or stand perpendicular to the ladder frame (7); - The lead frame (7) has in its intermediate areas (8) and / or on its carriers surface elements, preferably panels (9), and / or rod elements for reinforcement. Chassis after Claim 1 characterized in that the longitudinal (10) and cross members (11) comprise a hybrid fabric and / or scrim. Chassis according to one or more of the preceding claims, characterized in that the surface elements, preferably panels (9), have a honeycomb structure (18) made of carbon fiber-reinforced plastic. Chassis according to one or more of the preceding claims, characterized in that the profile girders or longitudinal (10) and / or transverse girders (11) are designed as foamed profiles, - the profiles being designed as elongated hollow bodies and round and / or in their outer geometry or are angular. Chassis according to one or more of the preceding claims, characterized in that the profile girders or longitudinal (10) and / or transverse girders (11) - have an outwardly directed surface which comprises a hybrid fabric and / or - scrim, and; - Have an inner region of the hollow body which is filled with foam. Chassis according to the previous one Claim 5 characterized in that the foam is XPS foam. Chassis according to one or more of the preceding claims, characterized in that the lead frame (7) is part of a tractor (12). Chassis according to one or more of the preceding claims, characterized in that the tractor (12) comprises a power end (13), the chassis being arranged behind a B-pillar (14) of the power end (13). Chassis according to one or more of the preceding claims, characterized in that the lead frame (7) is made of steel and / or aluminum. Chassis according to one or more of the preceding claims, characterized in that the longitudinal (10) and / or cross members (11) and / or carriers of the lead frame (7) are encased in a honeycomb structure (18) made of carbon fiber reinforced plastic. Chassis according to one or more of the preceding claims, characterized in that the honeycomb structure (18) comprises a honeycomb core (17) and load-bearing cover skins (16), the cover skins (16) being designed from at least one layer of a hybrid fabric and / or scrim. Chassis according to one or more of the preceding claims, characterized in that at least one longitudinal (10) and / or cross member (11) is firmly connected to the ladder frame (7). Chassis according to one or more of the preceding claims, characterized in that the longitudinal (10) and / or cross members (11) are spaced from the lead frame (7) at a height of 0.1 meters to 2 meters. Chassis according to one or more of the preceding claims, characterized in that the longitudinal (10) and / or cross members (11) are integrated in the side walls of the mobile home or mobile home. Chassis according to one or more of the preceding claims, characterized in that the lead frame (7) and a longitudinal (10) and / or cross member (11) are connected to one another via connecting means and / or adapters. Chassis according to one or more of the preceding claims, characterized in that the lead frame (7) is to be divided into an inner area (1) and an outer edge area (2), wherein the surface elements, preferably panels (9), and / or the rod elements are present in the intermediate areas (8) of the edge area (2). Chassis according to one or more of the preceding claims, characterized in that the outer edge region (2) of the lead frame (7) has surface elements, preferably panels (9) and / or rod elements, along its entire longitudinal direction. Chassis according to one or more of the preceding claims, characterized in that the hybrid fabric and / or scrim comprises a mixed fiber reinforcement made of carbon fibers and aramid fibers. Chassis according to one or more of the preceding claims, characterized in that the fiber reinforcement of the hybrid fabric and / or structure comprises aramid fibers with a weight proportion between 40% and 60% and in particular about 50%, with carbon fibers also being included and with the weight proportions refer to the total weight of the fiber reinforcement. Chassis according to one or more of the preceding claims, characterized in that the hybrid fabric and / or scrim 2 to 14, preferably 2 to 9 and in particular 4 to 7 layers, the fiber orientations of the successive layers each differing by an angle of approximately 15 °, 18 °, 30 °, 45 ° or 90 °. Chassis according to one or more of the preceding claims, characterized in that each layer of the hybrid fabric and / or scrim has a thickness of approximately 0.3 mm. Chassis according to one or more of the preceding claims, characterized in that the longitudinal (10) and cross members (11) are arranged in a rear region of the chassis. Chassis according to one or more of the preceding claims, characterized in that the longitudinal (10) and cross members (11) are connected to one another and arranged in one plane, the plane being 0.3-1.8 meters in height from the ladder frame (7) . Chassis according to one or more of the preceding claims, characterized in that the rod elements comprise a material selected from the group: plastic, steel, aluminum, magnesium, titanium. Chassis according to one or more of the preceding claims, characterized in that the rod elements are made from a composite material and / or have fiber reinforcement. Chassis according to one or more of the preceding claims, characterized in that the rod elements comprise hybrid fabrics and / or scrims. Chassis according to one or more of the preceding claims, characterized in that the chassis comprises three longitudinal members (10) and five transverse members (11). Chassis according to one or more of the preceding claims, characterized in that in the inner area (1) of the lead frame (7) an energy store (3), preferably a battery or a gas tank, a heating source (6) and a fresh (5) and waste water tank (4) are attached. Residential or mobile home comprising a chassis according to one or more of the preceding claims and walls. Residential or mobile home, characterized in that at least one wall of the mobile home or mobile home comprises a honeycomb structure made of carbon fiber reinforced plastic and / or hybrid fabric and / or scrim Residential or mobile home, characterized in that at least one wall of the mobile home or mobile home comprises an integrated longitudinal (10) and / or transverse beam (11) - the longitudinal beams (10) being designed as profiled beams spaced one height apart from the ladder frame; - The cross members (11) being designed as profiled carriers spaced one height apart from the ladder frame and / or as profiled carriers standing vertically on the ladder frame; - wherein the longitudinal (10) and cross members (11) comprise a hybrid fabric and / or scrim.

Images