Floor structure for the body of a motor vehicle

Abstract

The invention relates to a floor structure for the body of a motor vehicle, having a vehicle floor (3), which is joined together from a plurality of lightweight plates (13) and is laterally connected to a respective side sill (11). In order that the floor structure has a particularly advantageous accident behavior in the event of a side impact, a plurality of large-format openings (30), which are situated at a distance from the side sills (11), are provided within the vehicle floor (3).

Description

[0001] Floor structure of a motor vehicle body

[0002] The invention relates to a floor structure of a motor vehicle body according to the preamble of claim 1. Furthermore, the invention relates to a method for producing such a floor structure according to the preamble of claim 13.

[0003] Such a floor structure is already known, for example, from DE 199 17 177 B4 and comprises a vehicle floor which is composed of one or more lightweight panels and which is laterally connected to a respective side sill,

[0004] The object of the present invention is to create a floor structure which exhibits particularly favorable accident behavior in the event of a side impact.

[0005] This problem is solved according to the invention by a soil structure with the features of claim 1. Advantageous embodiments with favorable further developments of the invention are the subject of the dependent claims.

[0006] The floor structure according to the invention of a motor vehicle body comprises a vehicle floor which is made up of a plurality of lightweight panels and which is laterally connected to a respective side sill.

[0007] To ensure that the floor structure exhibits particularly favorable crash behavior in the event of a side impact, a number of large openings are provided within the vehicle floor, which are arranged at a distance from the side sills.

[0008] According to the invention, several large openings are incorporated within the vehicle floor to create an adjustable, scalable stiffness system. This ensures that the floor structure exhibits a desired, as uniform as possible, stiffness at every point along the side sill, relative to the vehicle's longitudinal direction, depending on the point of impact of an obstacle / post in a side collision. Furthermore, the openings allow for targeted material savings or the accommodation of various components. These openings can be designed as through-holes or as blind openings, where, for example, only the upper cover wall of the extruded profile is removed.

[0009] All openings share the characteristic of being positioned at a distance from the side sills, meaning they do not extend to the respective side sills. This is primarily to ensure that, in the event of an accidental impact such as a side collision with a pole, the side sill is adequately supported by the vehicle floor. For this reason, the vehicle floor runs continuously along the entire length of the side sill on its outer edges and is not interrupted by any of the openings that reach the side sill. Instead, these openings are recessed at a distance from the side sill, located within the interior of the vehicle floor, or are bordered on their outer circumference by the vehicle floor.

[0010] Large-format openings are understood to mean that these are not merely drill holes or similar smaller openings used for fastening or passing through components, lines or cables, but rather have a corresponding size.

[0011] In a further embodiment of the invention, the side sills at the front and rear ends of the vehicle floor are connected to each other by a cross member. This creates a counter-bearing in the area of ​​the respective door pillars, thus providing particularly favorable support and high rigidity of the side sill in the event of a side impact. A cross member designed as a hollow chamber profile is provided at the front and / or rear end. This allows the vehicle floor to transition particularly smoothly into, for example, a front bulkhead or a rear floor via the respective cross member, with the cross member at the front or rear end of the vehicle floor imparting exceptional rigidity to the floor structure.

[0012] In a further embodiment of the invention, the lightweight panels are arranged one behind the other in the vehicle's longitudinal direction, with their longitudinal extension running in the transverse direction. This results in particularly favorable scalability of the vehicle floor. Furthermore, corresponding openings can be easily created by omitting a portion of the lightweight panels along their length. Due to this orientation of the lightweight panels in the transverse direction and their arrangement one behind the other in the longitudinal direction, it is possible, for example, to create corresponding derivatives or construction variants within a vehicle series in a simple yet rigid and stable manner, whose vehicle floors have different lengths relative to the vehicle's longitudinal direction.In particular, the potential use of different lightweight panels, which may vary in height relative to the vehicle's height and / or width relative to its length, or in their shape, material, or thickness, allows for easy scalability of the floor structure or vehicle floor. Each lightweight panel has a top wall with hollow chambers between it. These top walls are spaced apart, ensuring an extremely rigid design for each panel and the vehicle floor as a whole.Furthermore, the hollow chambers can be used for a wide variety of functions, such as routing cables, conveying media, filling with insulating material and / or energy-absorbing material, or similar applications. The respective lightweight panels are formed primarily by extruded profiles with hollow chambers running transversely to the vehicle. Such extruded profiles are particularly easy and cost-effective to manufacture. The longitudinal extent of the respective lightweight panel refers specifically to the fact that, for example, hollow chambers within the lightweight panels run transversely to the vehicle, or that the corresponding lightweight panels are dimensioned so that their longitudinal extent runs transversely to the vehicle.

[0013] In a further embodiment of the invention, the respective opening is formed by a gap between two lightweight panels extending in the transverse direction of the vehicle and overlapping. Or, in other words, instead of one lightweight panel, two lightweight panels are arranged one behind the other in the longitudinal direction, which are spaced apart from each other to form the corresponding opening. This allows the creation of such an opening in a particularly simple manner.

[0014] In a further embodiment of the invention, the respective opening is spanned by a longitudinal beam structure. This allows any weakening that may arise from the opening to be compensated for in a particularly simple and reliable manner. In a further embodiment of the invention, at least one lightweight panel forms a cross-beam element with a larger cross-section extending in the transverse direction of the vehicle, with the openings being arranged in the area of ​​the lightweight panels having a smaller cross-section. This allows, for example, the corresponding lightweight panel to form a type of cross-beam in order to specifically stiffen the vehicle floor in this area.

[0015] In a further embodiment of the invention, the respective opening is arranged in the central area of ​​the vehicle floor. This allows for particularly large openings to be incorporated into the vehicle floor.

[0016] In a further embodiment of the invention, a plurality of openings are provided, arranged in the longitudinal direction of the vehicle and overlapping each other. This allows, for example, the placement of openings outside the central area of ​​the vehicle floor.

[0017] In a further embodiment of the invention, the respective opening is designed as a through-opening. Here, the openings can be created, for example, simply by omitting a section of a lightweight panel. Likewise, the openings can also be created in the vehicle floor using any other common machining method.

[0018] In a further embodiment of the invention, the side sills connect to a lateral end face of the vehicle floor. This results in particularly favorable support of the side sill at the end face of the vehicle floor.

[0019] Further features of the invention will become apparent from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown in the figures alone, are not only usable in the combinations specified, but also in other combinations or on their own.

[0020] The invention will now be explained in more detail with reference to a preferred embodiment and the drawings. Figures 1a, b, c, and d show a perspective top and bottom view of a floor structure of a motor vehicle body with a vehicle floor constructed from a plurality of lightweight panels, in which the lightweight panels are oriented with their longitudinal extent in the transverse direction of the vehicle and are arranged one behind the other in the longitudinal direction of the vehicle, as well as partial perspective views in the area of ​​the front and rear ends of the vehicle floor.

[0021] Fig. 2a, b respective sectional views, namely the floor structure along a cutting plane running in the longitudinal direction of the vehicle or in the vertical direction of the vehicle,

[0022] Fig. 3 shows further partial sectional views of the vehicle floor along a cutting plane running in the longitudinal direction of the vehicle and in the vertical direction of the vehicle, respectively.

[0023] Fig. 4 shows three schematic and perspective sectional views through a plurality of lightweight panels, by means of which a length scaling of the vehicle floor can be implemented.

[0024] Fig. 5 shows respective sectional views through the floor structure along corresponding cutting planes running in the longitudinal direction of the vehicle or in the vertical direction of the vehicle, in which respective vehicle floors scaled in length according to Fig. 4 are used.

[0025] Fig. 6 shows a partial top view of a vehicle floor formed from a plurality of lightweight panels, within which respective openings are recessed.

[0026] Figs. 7a, 7b respective cross-sectional views along a cutting plane extending in the vehicle's vertical direction or in the vehicle's transverse direction through the floor structure according to the invention,

[0027] Figs. 8a, 8b show partial sectional views along corresponding cutting planes running in the longitudinal direction of the vehicle or in the vertical direction of the vehicle in the area of ​​a respective cross member at the front or rear end of the vehicle floor, respectively.

[0028] Fig. 9 shows a top view of the floor structure with the vehicle floor formed from a plurality of lightweight panels, within which respective openings are recessed.

[0029] Figures 1a and 1b show, in perspective top and bottom views respectively, a floor structure and chassis of a motor vehicle body, comprising a front structure 1 and a rear structure 2, between which a vehicle floor 3 extends. The front structure 1 extends longitudinally to the rear of the vehicle up to a front bulkhead 4, which divides the front structure 1 from a passenger compartment 5. Within the area of ​​the front structure 1, longitudinal members / engine mounts 6 and upper longitudinal members 7 at the level of each fender bank are visible, extending rearward to the respective front door pillars 8, which laterally frame the front bulkhead 4.

[0030] The rear body structure 2 essentially comprises rear longitudinal members 9, which extend inside the respective wheel arches 10 over the rear wheels and connect at their front ends to the rear ends of the respective side sills 11, which extend over the entire length of the vehicle floor 3 between the front and rear wheel arches 10. Between the rear longitudinal members 9 are also respective body-in-white structural components, such as cross members of a rear floor structure 12.

[0031] Figures 1c and 1c show partial perspective views of the front and rear ends of the vehicle floor 3. Longitudinal structures 31, which are designed like a central tunnel or exhibit a similar stiffening behavior, are further explained in connection with Figures 6, 7a, and 7b.

[0032] Figures 2a and 2b each show a sectional view along a section plane extending in the longitudinal direction and vertical direction of the vehicle, respectively, of the floor structure according to Figures 1a and 1b. Furthermore, Figure 3 shows partial sectional views of the vehicle floor 3, also along a section plane extending in the longitudinal direction and vertical direction of the vehicle. Figure 4 additionally illustrates the scaling possibilities of the vehicle floor 3 using three schematic sectional views, which will be explained in more detail below.

[0033] In summary, Figures 1a to 4 show that the vehicle floor 3 is formed from a plurality of lightweight panels 13, which are oriented in their longitudinal extent in the transverse direction of the vehicle and are arranged one behind the other in the longitudinal direction of the vehicle.

[0034] As can be seen particularly from Figures 2a to 4, in the present embodiment the respective lightweight panels 13 are designed as extruded profiles, with respective cover walls 14, 15, between which respective hollow chambers subdivided by webs 16 are formed. The extruded profiles or hollow chambers 17 of the lightweight panels 13 therefore also extend in their longitudinal direction transverse to the vehicle.

[0035] In particular, Fig. 4 shows that a plurality of lightweight panels 13, extending transversely and approximately horizontally, are arranged one behind the other to form the vehicle floor 3 of a corresponding length, depending on the derivative or construction variant of the respective vehicle series being created. Experience has shown that the vehicle floor 3, which is also referred to as the main floor or floor center, is longer in a 4- or 5-door sedan than, for example, in a three-door coupe or convertible.

[0036] As can be seen particularly in Fig. 4, the vehicle floor 3 is therefore scalable in length with respect to the longitudinal direction of the vehicle by arranging a different number of lightweight panels 3 one behind the other in the longitudinal direction of the vehicle. While, for example, six lightweight panels 13 are used in the lower embodiment according to Fig. 4, nine lightweight panels 13 are used in the middle embodiment and seven lightweight panels 13 in the uppermost embodiment.

[0037] Figure 4 also shows that the respective lightweight panels 13 can assume different shapes or forms in cross-section. While some lightweight panels 13 have a uniform thickness with, for example, only one row of hollow chambers 17, there are also lightweight panels 13h which, for example, have a larger cross-section with two rows of hollow chambers 17 arranged one above the other. These lightweight panels 13h serve, for example, as crossbeams or seat crossbeams.

[0038] Furthermore, Fig. 4 shows individual lightweight panels 13ü, each with openings 18 in one of the cover walls 14. These openings 18 can serve various purposes, for example, for fastening corresponding components or parts, or for routing components, lines, cables, or the like within the hollow chambers 17, or for at least partially housing components within the respective lightweight panel 13ü.

[0039] By using uniform lightweight panels 13 that are both cross-model and intended for several derivatives or model variants of a vehicle series, as well as model variant-specific lightweight panels 13 that are intended only for one or more derivatives or model variants of a vehicle series, it is thus possible, as shown in Fig. 4, to easily assemble a desired vehicle floor 3 of the corresponding length, for example to obtain a vehicle floor 3 for a longer vehicle, such as a sedan, or for a shorter vehicle, such as a coupe or a convertible.

[0040] The respective lightweight panels 13 can be connected to each other, for example, by means of appropriate joining connections, by means of mechanical connecting devices or by means of other components, for example support components, such as the side sills 11.

[0041] Another connection option can be seen in conjunction with Figs. 3 and 4 with Figs. 8a and 8b, in which respective sectional views of the front and rear ends of the vehicle floor are shown along a respective cutting plane running in the longitudinal direction of the vehicle or in the vertical direction of the vehicle.

[0042] For example, Fig. 8b shows how the lightweight panel 13 is joined to the lightweight panel 13H, which in this case is designed as a cross member or heel element 32, at which the vehicle floor 3 transitions into a rear floor at its rear end. It is evident that the two lightweight panels 13 and 13H each have a projecting flange 21 or 22 on their respective facing end faces 19, 20 and on their opposite broad sides or cover walls 14, 15. These flanges are connected to the corresponding cover wall 14, 15 of the adjacent lightweight panel 13, 13H by forming a flange connection 23, 24.For example, an adhesive bond or adhesive connection can be provided between the respective flange 21, 22 and their associated cover wall 14, 15. Likewise, a corresponding adhesive bond can be present between the respective end faces 19, 20 of the two lightweight panels 13, 13H.

[0043] Furthermore, it is evident that this type of double-shear connection with the two flange connections 23, 24 is suitable for compensating for tolerances in the longitudinal direction of the vehicle, depending on the relative spacing of the two end faces 19, 20. It is also evident that the two flange connections 23, 24, spaced apart at the level of the respective cover wall 14, 15, create a connection between the two lightweight panels 13, 13H, allowing the entire vehicle floor to be subjected to tensile or compressive loads, for example, in the plane of the respective cover wall 14, 15. The sandwich-like, double-walled design of the respective lightweight panel 13, 13H in the joining area thus provides a particularly stiff and stable connection between the respective lightweight panels.The two-section connection of the respective lightweight panels 13, 13H shown here can of course be applied to all lightweight panels, such as those shown in connection with Fig. 4.

[0044] Alternatively, the two lightweight panels 13, 13H can also be joined together by gas metal arc welding in the area of ​​the flange connections 23, 24. Furthermore, it is conceivable to use flow-drill screws or semi-tubular rivets in addition to the adhesive bond.

[0045] Figures 2a to 3 further show that the present sandwich floor, or vehicle floor 3, is scalable both in terms of the height of the respective lightweight panels 13, their profile design or division of the hollow chambers 17, and the wall thickness of the respective cover walls 14, 15 or webs 16. Thus, as can be seen, for example, in Figure 3, individual lightweight panels 13H with a different height profile can be exchanged according to arrow 25, for example, depending on the vehicle weight or other parameters. Likewise, individual lightweight panels 13H can be exchanged depending on the corresponding seat connection or other parameters according to arrow 26.

[0046] Figure 5, which shows the floor structure in three sectional views along a respective section plane running in the longitudinal direction of the vehicle and in the vertical direction of the vehicle, illustrates the different lengths of the vehicle floors as shown in Figure 4. It is also particularly evident that a cross member element 27, 28 in the form of a corresponding lightweight profile or a lightweight panel / extruded profile is arranged at the front and rear ends of the vehicle floor 3. This respective cross member element 27, 28 is connected to the respective lightweight panels 13 of the vehicle floor 3 in the manner described in connection with Figures 8a and 8b. The front cross member element 27 creates, in particular, a transition from the vehicle floor 3 to the front wall 4, which can be formed, for example, as a sheet metal forming part, a cast component, or also from lightweight panels.The connection of the corresponding crossbeam element 27 to the front wall 4 can be effected, for example, by a joining connection or by mechanical fasteners. The respective front longitudinal beams / engine mounts 6 are also supported and fastened to the front crossbeam element 27.

[0047] The rear crossmember element 28, at which the vehicle floor 3 transitions into a rear floor 29, is also designed as an extruded profile or multi-chamber profile or lightweight panel. The height of this crossmember element 28 can be variable. The crossmember element 28 is connected to the rear floor 29, which can be formed, for example, from a sheet metal forming part, a metal casting component, or several lightweight panels, via joining connections and / or mechanical fasteners.

[0048] Figure 6, which shows a partial top view of the vehicle floor 3, illustrates that three openings 30 can be provided within the vehicle floor 3. These openings 30 are formed, in particular, by maintaining a corresponding gap between two lightweight panels 13 that overlap each other in the transverse direction of the vehicle. In other words, in the area of ​​each opening 30, two lightweight panel sections 13t are provided by means of a continuous lightweight panel 13, which have the same width in the longitudinal direction of the vehicle. This creates a suitable opening 30 in a simple manner, for example, in areas that are subject to little stress or that are necessary, for example, to access a corresponding area below the vehicle floor, such as for a battery housing of an electric drive system.

[0049] In combination with Figs. 1a and 1b, Fig. 6 and Figs. 7a and 7b, which show respective cross-sectional views along a cutting plane running in the vehicle's vertical direction or in the vehicle's transverse direction through the floor structure according to the invention, it becomes particularly clear how the front and rear longitudinal structure 31 are designed.

[0050] The front longitudinal structure 31, which, according to Fig. 1a, connects to a pedal base 37 of the front bulkhead 4, comprises two profile elements 33 extending towards each other in the longitudinal direction of the vehicle. These profile elements are designed as extruded profiles extending in the longitudinal direction of the vehicle. In the connection area to the pedal base 37, additional, essentially triangular profile elements 34 are attached to the upper side of the respective profile elements 33, providing additional stiffening. The two profile elements 34 are also connected to each other via at least one transverse element 35.

[0051] The longitudinal structure 31, or the respective profile elements 33, which span the openings 18 in a bridge-like manner, also connect the corresponding lightweight panels 13 on their upper sides. The longitudinal structures 31 serve, in particular in the longitudinal direction of the vehicle, to stiffen the vehicle floor 3.

[0052] In the longitudinal structure 31 shown in Fig. 1d, respective profile elements 36 are provided, which in particular serve as corner stiffeners between the lightweight panels 13 of the vehicle floor 3 and the extruded profile 13 designed as a heel element 32. The profile elements 36 are also designed as extruded profiles.

[0053] Figures 7a and 7b show, in particular, the respective side sills and their connection to the vehicle floor 3. Figure 7a shows a cross-section through the floor structure in the area of ​​the longitudinal structure 31. Figure 7b shows a cross-section through the floor structure in the area of ​​a raised lightweight panel 13h, which in this case is designed as a seat cross member.

[0054] Furthermore, it becomes clear that the vehicle floor 3, or rather its lightweight panels 13, butt-jointly connect to the respective side sills 11 and are connected to the corresponding side sill 11, for example, via a weld seam in both the area of ​​the upper cover wall 14 and the lower cover wall 15. The side sills 11 are, for example, composed of profile elements, which are designed as extruded profiles running horizontally in the longitudinal direction of the vehicle.

[0055] Fig. 9 shows, analogous to Fig. 6, a top view of the floor structure with the vehicle floor 3 formed from a plurality of lightweight panels 13, 13h, within which the respective openings 30 are recessed.

[0056] In the present case, two rectangular openings 30 are recessed in the central area of ​​the vehicle floor 3 at the front. In the rear area of ​​the vehicle floor, behind a rear seat crossmember 13h, two openings 30 are provided to the sides of the central area. All openings 30 have in common that they are arranged at a distance from the side sills, i.e., they do not extend to the respective side sill 11. This is particularly important to ensure that the respective side sill 11 is adequately supported by the vehicle floor 3 in the event of a force applied in an accident resulting from a side collision, for example, in the case of an impact with a pole 38 (shown schematically). For this reason, the vehicle floor 3 runs continuously along its entire outer length along the side sill 11 and is not interrupted by any of the openings 30 that extend to the side sill 11.Rather, these are set back at a distance from the side sill 11 inside the vehicle floor 3 or are limited on the outer circumference by the vehicle floor.

[0057] The openings 30 are formed, in particular, by maintaining a corresponding gap between two lightweight panels 13 that overlap each other in the transverse direction of the vehicle. In other words, in the area of ​​each opening 30, two lightweight panel sections 13t are provided by means of a continuous lightweight panel 13, which have the same width with respect to the longitudinal direction of the vehicle. This creates a corresponding opening 30 in a simple manner. It would also be conceivable, of course, to create the openings 30 in the vehicle floor using known methods. The openings 30 can, in particular, be designed as through-openings, if necessary.However, they can also be designed as blind openings, in which, for example, only the upper cover wall and, if applicable, corresponding webs between the chambers of the lightweight panels / extruded profiles 13 are removed, as is the case, for example, with the openings 18. The openings can remain clear or serve to accommodate components, pipes, ducts, cables, or the like.

[0058] Furthermore, it can be seen that the side sills 11 at the front and rear ends of the vehicle floor 3 are connected to each other by the respective cross member element 27, 28.

[0059] The front crossmember element 27, together with the door pillar (A-pillar 8), serves as a counter-bearing in the front area of ​​the vehicle floor 3, by means of which, in the event of a side collision, for example, an impact with a pole 38 (schematically indicated), the corresponding side sill 11 is supported towards the center of the vehicle. A battery housing located below the vehicle floor is thus optimally protected from damage in this area.

[0060] The rear crossmember element 28, which, for example, includes the heel element 32 and a front section 39 of the rear vehicle structure 2, serves together with a rear door pillar (C-pillar 40) as a counter-bearing in the rear area of ​​the vehicle floor 3. In the event of a side collision, such as an impact with a schematically indicated pole 38, this support braces the corresponding side sill 11 towards the center of the vehicle. The battery housing located below the vehicle floor is thus optimally protected from damage in this area.

[0061] In the middle area of ​​the floor structure, the sandwich structure of the vehicle floor 3 serves as a counter bearing to absorb the forces F, which are introduced, for example, in a side collision such as a pile impact of a pile 38.

[0062] As described above, the vehicle floor 3 with the openings 30 serves as an adjustable, scalable stiffness system by means of which the desired deformation and energy absorption in the central area of ​​the vehicle floor 3 or the floor structure is achieved. The adjustment is made in particular by the number, size, and arrangement of the openings 30 at their distance from the respective side sill 11. Factors such as vehicle weight, ride height, and other influencing variables are taken into account.

[0063] In the area of ​​the front structure 1 and the rear structure 2, respective drive components 41, 42 are shown, which may have high moments of inertia M in the event of a side collision, which must also be taken into account when considering the physical basic relationships of the present sill system.

[0064] Reference symbol list

[0065] Front structure Rear structure Vehicle floor Bulkhead Passenger compartment Longitudinal members / engine mounts Longitudinal members Door pillars Longitudinal members Wheel arches Side sills Floor structure Lightweight panels Cover wall Cover wall Web Hollow chamber Opening Front face Front face Flange Flange Joint connection Joint connection Arrow Arrow Cross member element Cross member element Rear floor Opening Longitudinal structure Heel element Profile elements Profile elements Transverse element Profile elements Pedal floor Pile Partial area C-pillar Drive components

Claims

Patent claims 1. Floor structure of a motor vehicle body, comprising a vehicle floor (3) which is made up of a plurality of lightweight panels (13) and which is laterally connected to a respective side sill (11), characterized in that a plurality of large-format openings (30) are provided within the vehicle floor (3), which are arranged at a distance from the side sills (11).

2. Floor structure according to claim 1, characterized in that the side sills (11) at the front and rear ends of the vehicle floor (3) are connected to each other by a cross member element (27, 28).

3. Floor structure according to claim 1 or 2, characterized in that the lightweight panels (13) are arranged one behind the other with their longitudinal extent extending in the transverse direction of the vehicle and in the longitudinal direction of the vehicle.

4. Floor structure according to one of the preceding claims, characterized in that the respective opening (30) is formed by a gap between two lightweight panels (13) extending in the transverse direction of the vehicle in overlapping fashion.

5. Floor structure according to one of the preceding claims, characterized in that the respective opening (30) is spanned by a longitudinal beam structure (31).

6. Soil structure according to one of the preceding claims, characterized in that a cross member element (27, 28) extending in the transverse direction of the vehicle with a larger height cross-section is formed by at least one lightweight panel (13h), wherein the openings are arranged in the area of ​​the lightweight panels (13h) with a smaller height cross-section.

7. Floor structure according to one of the preceding claims, characterized in that the respective opening (30) is arranged in the central area of ​​the vehicle floor (3).

8. Floor structure according to one of the preceding claims, characterized in that a plurality of openings (30) arranged in the longitudinal direction of the vehicle in overlapping arrangements are provided.

9. Floor structure according to one of the preceding claims, characterized in that the respective opening (30) is designed as a through-opening.

10. Floor structure according to one of the preceding claims, characterized in that the side sills (11) connect to a lateral end face of the vehicle floor (3).

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