Motor vehicle body with an armored floor structure

Abstract

The invention relates to a motor vehicle body with a passenger compartment (1) which is made of an armored base compartment (2) and a floor structure (22) which is connected to the lower face of the base compartment and which has a vehicle floor (29). In order to provide a motor vehicle body with a highly effective armoring of the floor structure (22), the vehicle floor (29) of the floor structure (22) has an armoring with at least one underbody protective plate (37, 38, 39), which is arranged on the lower face of the vehicle floor (29), and at least one protective plate (44), which is arranged on the inner face (43) of the vehicle floor (29), said inner face facing the vehicle interior (42).

Description

[0001] Motor vehicle body with an armored floor structure

[0002] The invention relates to a motor vehicle body with a passenger cell comprising an armoured basic cell and a floor structure, according to the preamble of patent claim 1.

[0003] Armored special-protection vehicles are particularly difficult to manufacture because they must meet a multitude of constraints. On the one hand, the most important goal is by far to equip the bodies of such special-protection vehicles with armor that provides particularly reliable protection for the vehicle occupants in the event of a bombing, shelling, or similar attack. On the other hand, such vehicle bodies should visually resemble, as closely as possible, the corresponding production vehicles without armor, for example, so as not to attract excessive attention in traffic, and should be manufactured with reasonable effort and limited costs.

[0004] Until now, such armored vehicle bodies were typically manufactured by fitting a production vehicle body with armored parts such as steel plates or aramid fiber components. The steel plates were typically attached to the inside of the structural components, particularly the passenger compartment, or within the cavities of the structural components, particularly using mechanical fasteners. This is not only extremely complex but also involves considerable additional weight.

[0005] For this reason, an armored basic cell for the passenger compartment is already known from DE 10 2004 053 198 A1, so that in this area of ​​the vehicle body, the standard passenger compartment is replaced by the armored basic cell. This results in considerable weight savings. This basic cell is covered with cladding parts that, for example, correspond to the wing body. On the underside, the armored basic cell is connected to an essentially unarmored standard floor structure. A front and rear section of the basic cell are connected to an armored bulkhead of the basic cell. The armoring of the floor structure also represents a particular problem, since security vehicles, for example, require anti-magnetic underbody protection, and this poses the particular problem of galvanically isolating the underbody protection from the floor structure or other components made of armored steel.However, complete underbody armoring is often not feasible in this case, for example, when recesses for components in the center tunnel area, such as a transmission, exhaust system, or drive shaft, are required within the underbody protection. The blasting requirements for the underbody protection are particularly stringent.

[0006] The object of the invention is to create a motor vehicle body which has a highly effective armoring of the floor structure.

[0007] This object is achieved according to the invention by a motor vehicle body having the features of patent claim 1. Advantageous embodiments of the invention are the subject of the dependent patent claims and the description.

[0008] The motor vehicle body according to the invention comprises a passenger cell which is formed from an armored basic cell and a floor structure connected to the underside thereof, which has a vehicle floor.

[0009] In order to create a motor vehicle body with highly effective armor plating of the floor structure, according to the invention, the vehicle floor of the floor structure has armor plating with at least one underbody protection plate arranged underneath the vehicle floor and at least one protective plate arranged on an inner side of the vehicle floor facing the vehicle interior. Accordingly, the vehicle floor in this case is provided with multi-part armor plating, which is arranged partially underneath the vehicle floor by means of the underbody protection plate and partially on top of the vehicle floor by means of the protective plate arranged on the inner side of the vehicle floor facing the vehicle interior.The combination of underbody armoring by means of at least one underbody protection plate and at least one protection plate arranged in the interior enables, on the one hand, optimal adaptation to the blasting requirements and, on the other hand, a correspondingly simple way of attaching the respective protection plates to the floor structure. In particular, underbody armoring often cannot be arranged continuously, for example, if the vehicle has a center tunnel with correspondingly housed components of an internal combustion engine. The protection plates arranged in the interior thus optimally complement the armoring.

[0010] In an advantageous embodiment of the invention, the underbody protection plate located underneath the vehicle floor is made of aluminum, as such a ductile material allows for excellent adaptation to blasting requirements. Alternatively, a steel or composite material would also be conceivable.

[0011] In order to achieve a favorable fastening of at least one protective plate arranged underside of the vehicle floor, this is galvanically separated from the vehicle floor made of a steel material.

[0012] In a further embodiment of the invention, the respective protective plate arranged on the inside of the vehicle floor facing the vehicle interior is made of a steel material. Thus, no galvanic isolation is required, and the respective protective plate can be conveniently welded to the vehicle floor, for example.

[0013] Finally, it has proven advantageous to arrange the interior protective plates on the inside of the center tunnel, as this allows the armor plating of the vehicle floor to be achieved particularly effectively in this area as well.

[0014] Further features of the invention emerge 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 alone in the figures, can be used not only in the respective specified combination, but also in other combinations or on their own.

[0015] The invention will now be explained in more detail using a preferred embodiment and with reference to the drawings. They show:

[0016] Fig. 1 is a partial side perspective view of a

[0017] Motor vehicle body for a special protection vehicle with a passenger cell, which is formed from an armoured base cell and an unarmoured series floor structure connected to the underside thereof, and which has an armoured front bulkhead of the base cell, to which a front end is connected at the front, which is designed as a series front end with structural components in the lower area of ​​the series front end, which are directly connected to the series floor structure, and with structural components in the upper area of ​​the series front end, which are connected to the armoured front bulkhead,

[0018] Fig. 2 is a partial side perspective view of the passenger compartment of the motor vehicle, showing a side wall part of the series passenger compartment with which the armored basic cell is covered,

[0019] Fig. 3 a partial perspective view of the passenger compartment of the

[0020] Motor vehicle, which is formed in the vehicle's longitudinal direction in the upper area by the armored bulkhead and underside by the series floor structure, which has a transverse yoke at which the armored bulkhead merges into the floor structure,

[0021] Fig. 4 is a fragmentary and enlarged view of Fig. 3.

[0022] Perspective view of the armored front wall of the basic cell and floor structure with the cross yoke,

[0023] Fig. 5 is a partial and perspective sectional view in

[0024] In the vertical direction of the vehicle and in the longitudinal direction of the vehicle through the vehicle body in the transition area of ​​the passenger cell formed by the armoured basic cell and the floor structure into the front of the vehicle,

[0025] Fig. 6 is a further partial and perspective sectional view in

[0026] In the vertical direction of the vehicle and in the longitudinal direction of the vehicle through the vehicle body in the transition area of ​​the passenger cell into the front of the vehicle,

[0027] Fig. 7 is a further partial and perspective sectional view in

[0028] In the vertical direction of the vehicle and in the longitudinal direction of the vehicle through the vehicle body in the transition area of ​​the passenger compartment into the front of the vehicle, whereby in particular the transition of the upper bulkhead into the transverse yoke is illustrated,

[0029] Fig. 8 is a further enlarged fragmentary and perspective sectional view in the vehicle vertical direction and in the vehicle longitudinal direction through the vehicle body in the transition area of ​​the passenger cell formed by the armored basic cell and the floor structure into the front of the vehicle, with the transition of the upper end wall into the transverse yoke being again illustrated,

[0030] Fig. 9 a perspective bottom view of the floor structure with the

[0031] Vehicle floor, from whose armoring the respective underbody protection plates arranged underneath the vehicle floor can be seen,

[0032] Fig. 10 a perspective bottom view of the floor structure with the

[0033] Vehicle floor analogous to Fig. 9, whereby the front underbody protection plates arranged on the underside of the vehicle floor are omitted,

[0034] Fig. 11 is a partial perspective view of the vehicle floor from above, with the respective protective plates of the armor being arranged on the inside of the vehicle floor facing the vehicle interior.

[0035] Fig. 1 shows a partial side perspective view of a vehicle body for an armored special protection vehicle. In this case, it is a sedan passenger car (notchback), which is also offered as a production vehicle without armor.

[0036] The motor vehicle body comprises a passenger cell 1, which is formed on the upper side from an armored basic cell 2. The armored basic cell 2 is made of a plurality of armor plates that are appropriately formed and welded together. The armor plates are made of a steel material and have, for example, a wall thickness or material thickness of 4 to 15 mm, although these values ​​can vary depending on the resistance class and other boundary conditions. In contrast to generally conventional armored passenger cells, in which respective armor plates are attached to the inside of the unarmored longitudinal components or in their hollow space, a basic cell 2 is created in the present case, which is itself formed from armor plates made of steel or the like. Accordingly, this basic cell 2 differs from the upper part of the safety passenger cell used in unarmored series vehicles.

[0037] In the present case, the respective side wall sections 3 of the armored basic cell 2 with associated door pillars, the respective A-pillar 4, the respective B-pillar 5 and the respective C-pillar 6, as well as the respective side sill sections 7 and the respective roof frame 8 are made of armored steel. Parts of a vehicle roof 9 with associated roof cross members 10 and roof panels 11 are also made of armored steel. A front bulkhead 12 of the basic cell 2 with an associated upper bulkhead cross member 13 is also made of armored steel. Finally, in the rear area, a structure 14 made of armored steel is formed, which, for example, has a rear partition 15 and a panel 16 at the level below a rear window opening 18. Overall, it can be seen that the basic cell 2 also has respective openings 19, 20 for front and rear side doors (not shown) as well as an opening 21 for a windshield.

[0038] The armored basic cell 2 is open at the bottom and is essentially closed by, or connected to, an essentially unarmored standard floor structure 22, which is used in the production vehicle without armor plating. The standard floor structure 22 is also armored, for example, by armor plates or the like attached to the outside or inside of the passenger compartment.

[0039] As a result, the passenger cell 1 is formed from the basic cell 1 designed as an armored cell and the series floor structure 22, which are connected to each other.

[0040] Towards the front in the longitudinal direction of the vehicle, a series front end 23, as used in the series vehicle without armor, adjoins the passenger cell 1 in a manner described below. Towards the rear, a series rear end also adjoins the passenger cell 1. According to Fig. 2, the passenger cell 1 of the motor vehicle body is shown again in a partial side perspective view, wherein a cladding part in the form of a side wall part 24 of the series passenger cell of the series vehicle without armor can be seen, with which the armored basic cell 2 is lined. Accordingly, in the present case, the armored passenger cell 1 is lined with series parts of the vehicle outer skin of the series vehicle without armor, so that the armored vehicle in its appearance corresponds at least substantially to that of the series vehicle without armor.

[0041] According to Fig. 3 and 4, which show a partial perspective view of the passenger cell 1 of the motor vehicle and a partial and enlarged perspective view of the passenger cell 1 compared to Fig. 3, it can be seen that the latter is formed at its front end in the vehicle longitudinal direction in the upper area by the armored front wall 12 and on the underside by the series floor structure 22.

[0042] Of the standard floor structure 22, a transverse yoke 25 can be seen in particular, which extends in relation to the vehicle's longitudinal direction and overlaps the bulkhead 12. This transverse yoke forms a cross member and extends between respective side sills 26, which are formed on the one hand by side sill parts 7 of the basic cell 2 and side sill parts 27 of the standard floor structure 22. In the area of ​​the vehicle center, the transverse yoke 25 rises in an arc to bridge a center tunnel 17 of the standard floor structure 22.

[0043] As can be seen from Figs. 3 and 4, the transverse yoke 25 forms the front upper end of the series floor structure 22, to which the armored end wall 12 of the basic cell 2 is connected at the top.

[0044] As shown in Fig. 5 and 6, which each show a partial and perspective sectional view in the vehicle vertical direction and in the vehicle longitudinal direction through the motor vehicle body in the transition area of ​​the passenger cell 1 formed by the armored basic cell 2 and the floor structure 22 into the series front end 23, a vehicle floor 28 with respective series floor panels 29 and cross members 30, which extend between the side sill parts 27 of the floor structure 22, adjoins the transverse yoke 25 downwards in the vehicle vertical direction and rearwards in the vehicle longitudinal direction. Towards the front in the vehicle longitudinal direction, structural components in the lower area of ​​the series front end 23, for example respective engine longitudinal members 31, at the level of a main longitudinal member level of the series front end 23, are directly connected to the series floor structure 22.3 shows the respective fastening or transition points 32 at which the two engine longitudinal members 31 transition into the transverse yoke 25 of the floor structure 22. Furthermore, the engine longitudinal members are supported and fastened to the floor structure 22 via a support structure 33, which can be seen in Figs. 5 and 6. This clearly shows that the respective structural components in the lower region of the series front end 23 are directly and immediately connected to the floor structure 22 or its transverse yoke 25.

[0045] As can be seen in particular from Fig. 5 in conjunction with Fig. 7, which shows a further partial and perspective sectional view in the vehicle vertical direction and in the vehicle longitudinal direction through the motor vehicle body in the transition area of ​​the passenger compartment into the front end 23, in the upper area of ​​the series front end 22 respective structural components such as respective longitudinal members / support members 34 are provided at the level of respective spring strut mounts 35, which are connected to the armored front bulkhead 12.

[0046] Depending on the material or sheet thickness, the structural components in the upper area of ​​the series front end 22 are connected directly to the bulkhead 12, in particular by gas-shielded arc welding (GAW) or another type of one-sided weld, or indirectly via the respective adapter parts. This is due in particular to the fact that the armored bulkhead 12 has a material thickness of, for example, 4 to 15 mm, so that only structural components with a sheet thickness of, for example, 1.2 to 1.5 mm or more can be welded to it. In contrast, structural components with sheet thicknesses of, for example, approximately 0.8 mm cannot usually be joined to the bulkhead 12 by welding, as they would be subject to excessive thermal input during welding.

[0047] For this reason, in the present case, the armored basic cell 2, in particular the front wall 12, is welded via respective adapter parts to correspondingly thinner structural components of the front end 22 and / or the floor structure 22, wherein the adapter parts have a sheet thickness which, at 1.5 to 4 mm, lies between the material thickness of the correspondingly thin structural component and the material thickness of the armored front wall 12.

[0048] Instead of or in addition to the connections described, it is theoretically also conceivable to connect structural components of the front end 22 to components of the basic cell 2, in particular the front wall 12, via mechanical connecting means.

[0049] Fig. 8 shows a further partial and perspective sectional view, enlarged compared to Fig. 7, in the vehicle vertical direction and in the vehicle longitudinal direction through the motor vehicle body in the transition area of ​​the passenger cell 1 formed by the armoured basic cell 2 and the floor structure 22 into the front section 23, wherein the transition of the upper, armoured front wall 12 into the transverse yoke 25 is again illustrated.

[0050] At least in one longitudinal region, but in this case across at least almost the entire vehicle width, the armored bulkhead 12 is limited at the bottom by the transverse yoke 25. The transverse yoke 25 is open at the top, so that the armored bulkhead 12 protrudes into a cavity 36 of the transverse yoke 25. The transverse yoke 25 is connected to the bulkhead 12 from both sides via corresponding SG welds.

[0051] Figure 9 shows a perspective bottom view of the previously explained series floor structure 22 with the vehicle floor 29. To provide the vehicle floor 29 with armor plating, underbody protection plates, namely two front underbody protection plates 37, 38 and one rear underbody protection plate 39, are attached to the underside of the vehicle floor 29. It is clear that the number and design of the underbody protection plates 37, 38, 39 can vary depending on the vehicle.

[0052] Fig. 10 shows the series floor structure 22 with the vehicle floor 29 in a perspective bottom view analogous to Fig. 9, wherein the front underbody protection plates 37, 38 arranged on the underside of the vehicle floor 29 have been omitted here.

[0053] This initially makes it clear that the vehicle floor 29 has the center tunnel 17 and is therefore designed for a vehicle with an internal combustion engine (ICE) located within the front end 23. Corresponding drivetrain components, which are matched to the internal combustion engine, are arranged in the area of ​​the center tunnel 17. These include, for example, a transmission, an exhaust system, and a propeller shaft, although the components can naturally vary depending on the drivetrain design.

[0054] The two front underbody protection plates 37, 38 are recessed in the area of ​​the center tunnel 17 because, for example, the components extend downwards in the vertical direction of the vehicle or have a cooling requirement that makes complete coverage impossible. The rear protection plate 39 limits the recess 40 for the center tunnel 17 to the rear.

[0055] The protective plates 37, 38, 39 are made of an antimagnetic material, and in this case, in particular, of an aluminum material. The protective plates 37, 38, 39 have a material thickness of, for example, 5 to 20 mm and, in particular, exhibit sufficient ductility to withstand the resulting loads in the event of an explosion. The protective plates 37, 38, 39 are attached to the underbody side 41 of the vehicle floor, for example, to the side sills 26 and in the center of the floor, with galvanic separation from the standard vehicle floor 29 made of steel material or the standard floor structure 22.

[0056] In order to achieve the required armoring, for example, in the area of ​​the center tunnel 17 as well, respective protective plates 44 are arranged on the inner side 43 of the vehicle floor 29 facing the vehicle interior 42 - as can be seen in Fig. 11 in a partial perspective view of the vehicle floor 29 taken obliquely from above. These protective plates 44, arranged on the upper / inside side of the vehicle floor 29, are made of a steel material in the present case and have, for example, a material thickness of 4 to 15 mm. These protective plates 44 can be connected, for example, by welding, for example SG welding, to the vehicle floor 29 of the floor structure 22, which is also made of a steel material. Of course, other connection technologies are also conceivable.

[0057] It is clear that the inner protective plates 44 can be arranged not only in the area of ​​the center tunnel 17 on the inside of the vehicle floor 29, but also anywhere on the inside 43 of the vehicle floor 29 facing the vehicle interior 42. List of reference symbols

[0058] Passenger cell Basic cell Side wall parts A-pillar B-pillar C-pillar Side sill parts Roof frame Vehicle roof Roof cross member Roof panels Bulkhead

[0059] Bulkhead cross member structure rear partition panels

[0060] Center tunnel Rear window opening Opening Opening Opening Series floor structure Series front end Side wall section Cross yoke Side skirts Side skirt parts Vehicle floor

[0061] Standard floor panels Cross member Engine longitudinal member Transition points Support structure Longitudinal member / support member Spring strut mounts Cavity Protection plates Protection plate Protection plate Recess Underbody side Vehicle interior Inside Protection plates

Claims

Patent claims 1. Motor vehicle body with a passenger cell (1) which is formed from an armoured basic cell (2) and a floor structure (22) which is connected to the underside thereof and which has a vehicle floor (29), characterized in that the vehicle floor (29) of the floor structure (22) has armouring with at least one underbody protective plate (37, 38, 39) arranged on the underside of the vehicle floor (29) and at least one protective plate (44) arranged on an inner side (43) of the vehicle floor (29) facing the vehicle interior (42).

2. Motor vehicle body according to claim 1, characterized in that the protective plate (37, 38, 39) arranged on the underside of the vehicle floor (29) is formed from an aluminum material.

3. Motor vehicle body according to claim 2, characterized in that the protective plate (37, 38, 39) arranged on the underside of the vehicle floor (29) is galvanically separated from the vehicle floor (29) made of a steel material.

4. Motor vehicle body according to one of the preceding claims, characterized in that the respective protective plate (44) arranged on the inner side (43) of the vehicle floor (29) facing the vehicle interior (42) is formed from a steel material.

5. Motor vehicle body according to one of the preceding claims, characterized in that the respective protective plate (44) arranged on the inner side (43) facing the vehicle interior (42) is welded to the vehicle floor (29).

6. Motor vehicle body according to one of the preceding claims, characterized in that the vehicle floor (29) has a center tunnel (17) which is recessed from the underbody protection plate (37, 38).

7. Motor vehicle body according to one of the preceding claims, characterized in that respective protective plates (44) are arranged on the inner side (43) of the center tunnel (17).

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