Driver's cab and utility vehicle

Abstract

A driver's cab (4) for a utility vehicle (1), with an interior space (I) bounded by the driver's cab (4), with a driver's cab floor (12), and with a protrusion (23, 24) which is integrally formed on the driver's cab floor (12) and is arched away from the interior space (I), wherein the protrusion (23, 24) has a first contour (25) which defines the protrusion (23, 24) in a first sectional plane (E1) intersecting the driver's cab floor (12) and which is curved arcuately at least in sections, wherein the protrusion (23, 24) has a second contour (26) which defines the protrusion (23, 24) in a second sectional plane (E2) intersecting the driver's cab floor (12) and which is curved arcuately at least in sections, and wherein the first sectional plane (E1) and the second sectional plane (E2) are positioned perpendicularly to each other.

Description

[0001] The present invention relates to a driver's cab for a commercial vehicle, in particular for a military commercial vehicle, and to a commercial vehicle, in particular a military commercial vehicle, having such a driver's cab. Off-road commercial vehicles for the military sector usually have a protected driver's cab. In order to protect the driver's cab occupants against gunfire, booby traps, improvised explosive devices (IEDs), mines, or the like, the driver's cab has a correspondingly armored driver's cab floor. The applicant is aware of internal prior art in which additional material in the form of thickened portions, such as a plurality of welded-together plates, ribs, and / or stiffening elements, is provided on the driver's cab floor.This makes it possible to produce a cab floor that is as rigid as possible, which can withstand a pressure wave generated when the cab is exploded and does not deform into the cab.

[0002] US 2014 / 0026741 A1 describes a system for absorbing an explosion load for a vehicle. The system comprises an outer skin with an outer side and an inner side, an inner structure arranged relative to the inner side of the outer skin, and an inner skin. The outer skin may be partially doubly curved.

[0003] Against this background, one object of the present invention is to provide an improved driver's cab for a commercial vehicle.

[0004] Accordingly, according to claim 1, a driver's cab for a commercial vehicle, in particular for a military commercial vehicle, is proposed. The driver's cab comprises an interior space delimited by the driver's cab, a driver's cab floor, and a protrusion formed on the driver's cab floor, which is curved away from the interior space such that the protrusion extends away from the interior space and into an area surrounding the driver's cab. The protrusion has a first contour defining the protrusion in a first sectional plane intersecting the driver's cab floor, which first contour is curved in an arcuate manner at least in sections, wherein the protrusion has a second contour defining the protrusion in a second sectional plane intersecting the driver's cab floor, which second contour is curved in an arcuate manner at least in sections, and wherein the first sectional plane and the second sectional plane are positioned perpendicular to one another.In this case, a first protrusion and a second protrusion are formed on the driver's cab floor and are arranged at a distance from one another, wherein a third protrusion is formed on the driver's cab floor, wherein the third protrusion is curved away from the interior, and wherein the third protrusion is arranged between the first protrusion and the second protrusion.

[0005] By providing the cab floor with a protrusion that curves away from the interior, the three-dimensional geometry of the protrusion, defined by the two contours, allows for high structural strength or rigidity of the cab floor. The additional materials mentioned above can advantageously be omitted. This results in a reduction in weight, reduces machining effort, and prevents deterioration of material properties due to heat input during welding of the additional materials.

[0006] The driver's cab can also be referred to as a driver's cab or driver's cabin. The driver's cab is designed to accommodate multiple occupants, such as a driver and a passenger. The driver's cab is, in particular, a protected driver's cab, or can be designated as such. This means that the driver's cab is protected against bullets, booby traps, IEDs, mines, or the like. For this purpose, the driver's cab can be constructed of, for example, armored steel plates or have armored steel plates. However, aluminum alloys or fiber composite materials can also be used.

[0007] The driver's cab comprises a front wall, a rear wall opposite the front wall, two opposite side walls, and the driver's cab floor. A driver's cab ceiling is located opposite the driver's cab floor. A windshield may be attached to the front wall. Doors may be provided on the side walls. The front wall, the rear wall, the side walls, the ceiling, and the driver's cab floor enclose the interior and thus separate the interior from the surroundings of the driver's cab. The interior can be accessible from the surroundings via doors and / or hatches. The cutting planes can be assigned to the driver's cab and / or the driver's cab floor.

[0008] In this context, a "bulge" is understood to mean a three-dimensional geometry that is bulge-shaped or, at least in sections, spherical, egg-shaped, or similarly curved. The bulge can also be referred to as a curvature or bulge. In this case, the bulge has, for example, the shape of a freeform surface. The fact that the bulge is "curved away" from the interior means that the bulge extends away from the interior and into the area surrounding the driver's cab.

[0009] In this context, a "contour" is understood to mean, in particular, a curve that, when viewed perpendicularly to the respective sectional plane, delimits the protrusion from its surroundings. The term "contour" can be replaced by the terms "outline" or "curve." The contours can, in particular, be composed of different radii, elliptical segments, oval segments, curved segments, straight segments, or the like. However, the contours are always curved in an arcuate manner at least in sections or have an arcuate curvature. In this context, a "curvature" is understood to mean the local deviation of the respective contour from a straight line. The contours can be inner contours or outer contours of the protrusion.

[0010] The fact that the contours "define" the protrusion in the respective sectional plane means in particular that the respective contour specifies a two-dimensional geometry of the protrusion, which results in the respective sectional plane when the respective sectional plane intersects the protrusion. In particular, the two contours define or determine the three-dimensional geometry of the protrusion. Preferably, any number of additional first sectional planes arranged parallel to the first sectional plane are provided, with the first contour changing in the different first sectional planes. The same applies to the second sectional plane and the second contour. The superposition of the two contours results in the three-dimensional geometry of the protrusion. In the event that the contours are identical, the protrusion can, in the simplest case, be spherical or spherical cap-shaped in sections.Preferably, however, the contours differ from one another in their two-dimensional geometry. This means that the first contour and the second contour preferably differ from one another and, in particular, are not identical.

[0011] According to one embodiment, a vertical direction of the driver's cab and a longitudinal direction of the driver's cab span the first sectional plane, wherein the vertical direction and a transverse direction of the driver's cab span the second sectional plane, and wherein the vertical direction, the longitudinal direction and the transverse direction are positioned perpendicular to one another.

[0012] The driver's cab is thus assigned a coordinate system with an x-direction or longitudinal direction, a y-direction or vertical direction, and a z-direction or transverse direction. This coordinate system can also be assigned to the driver's cab floor. The fact that the vertical direction and the longitudinal direction "spanning" the first sectional plane means, in this case, that the vertical direction and the longitudinal direction lie in the first sectional plane. Alternatively, the vertical direction and the longitudinal direction can each be aligned parallel to the first sectional plane. The same applies to the second sectional plane and, accordingly, to the vertical direction and the transverse direction.

[0013] According to a further embodiment, the first cutting plane and the second cutting plane each intersect the protrusion centrally.

[0014] The protrusion can be constructed mirror-symmetrically to at least one of the cutting planes. However, as previously mentioned, any number of first cutting planes and / or any number of second cutting planes can be provided, with the first cutting planes and the second cutting planes each being arranged parallel to one another. In this case, these additional cutting planes do not intersect the protrusion centrally.

[0015] According to a further embodiment, the driver's cab comprises a seat which is arranged above the protrusion.

[0016] Preferably, a first seat or driver's seat and a second seat or front passenger seat are provided. In particular, the seat is positioned above the protrusion when viewed in the vertical direction. Each seat can be assigned such a protrusion. However, at least the first seat is assigned such a protrusion. The seats are arranged spaced apart from one another when viewed in the transverse direction. When viewed in the transverse direction, the seats are preferably positioned centrally above the protrusions. However, when viewed in the transverse direction, the seats can also be positioned off-center relative to the respective protrusion.

[0017] According to a further embodiment, the first contour is continuously curved and / or the second contour is continuously curved.

[0018] In particular, the first contour and / or the second contour are continuously curved in an arc shape. This means that either the first contour or the second contour, or both contours, can be continuously curved. "Continuously curved" in this case means that the first contour and / or the second contour have no straight sections. In the case where the first contour and / or the second contour are continuously curved, the respective contour is preferably composed exclusively of different curved geometries, such as circular segments, arcs, radii, elliptical segments, oval segments, and / or curved segments. In this case, an "arc" can be understood to mean a circular arc, i.e., a circular segment. The first contour and / or the second contour can also be a circular segment, an arc, a radius, an elliptical segment, an oval segment, or a curved segment.In this case, the first contour and / or the second contour are not composed of different geometries.

[0019] According to a particularly preferred embodiment, a driver's cab for a commercial vehicle, in particular for a military commercial vehicle, is accordingly proposed. The driver's cab comprises an interior space delimited by the driver's cab, a driver's cab floor, and a protrusion formed onto the driver's cab floor and curved away from the interior space, wherein the protrusion has a first contour defining the protrusion in a first sectional plane intersecting the driver's cab floor, which first contour is continuously curved, wherein the protrusion has a second contour defining the protrusion in a second sectional plane intersecting the driver's cab floor, which second contour is continuously curved, and wherein the first sectional plane and the second sectional plane are positioned perpendicular to one another.

[0020] According to a further embodiment, the protrusion is curved in an egg-shaped manner at least in sections.

[0021] The term "egg-shaped" can be replaced by the term "ovoid-shaped." The geometry of the protrusion can therefore also be referred to as an ovoid. In this case, the terms "egg-shaped" or "ovoid-shaped" refer to a three-dimensional, rounded figure that, in the broadest sense, resembles the profile of a bird's egg. In particular, the egg-shaped geometry can be created by rotating an oval around an axis of symmetry. However, unlike an ellipse, the oval has only one axis of symmetry, to which the oval is mirror-symmetrical. The egg-shaped geometry of the protrusion results from the two contours oriented perpendicular to each other. However, the protrusion only partially forms an egg-shaped geometry, which protrudes downwards from the driver's cab floor into the surrounding area.

[0022] According to a further embodiment, the first contour differs in its curvature from the second contour.

[0023] In this context, "curvature" or "degree of curvature" refers to the deviation of the respective contour from a straight line. The greater the curvature, the tighter or more pronounced the respective contour curves.

[0024] According to a further embodiment, the second contour is more curved than the first contour.

[0025] The differently curved contours result in the egg-shaped geometry of the protrusion. The contours are preferably both convexly curved. Thus, the protrusion itself is also convexly curved. This means that the protrusion bulges out from the interior into the surrounding area.

[0026] A first protrusion and a second protrusion are formed on the cab floor and are arranged at a distance from each other.

[0027] In particular, the first protrusion and the second protrusion are arranged spaced apart from one another in the transverse direction. As previously mentioned, the driver's cab can have two seats, with each seat then being assigned such a protrusion. In particular, the first seat, or driver's seat, is assigned the first protrusion. Accordingly, the second seat, or passenger seat, is assigned the second protrusion.

[0028] A third protrusion is formed on the cab floor, the third protrusion being curved away from the interior, and the third protrusion being arranged between the first protrusion and the second protrusion.

[0029] In particular, the third protrusion is arranged between the first protrusion and the second protrusion, viewed along the transverse direction. Preferably, the third protrusion protrudes less from the interior than the first protrusion and the second protrusion.

[0030] According to a further embodiment, a dome section projecting into the interior is formed on the driver's cab floor and is arranged between the first protrusion and the second protrusion.

[0031] Viewed along the vertical direction, the dome section is preferably arranged above the third protrusion. The driver's cab floor is preferably constructed mirror-symmetrically to a third sectional plane of the driver's cab running centrally through the dome section. The third sectional plane is positioned parallel to the first sectional plane and spaced apart from it. The dome section can, for example, accommodate a transmission tunnel of the commercial vehicle. Viewed along the transverse direction, the dome section is positioned between the first seat and the second seat. In particular, the dome section is arranged centrally in the driver's cab, viewed along the transverse direction.

[0032] According to a further embodiment, the dome section has a radius defining the dome section in the second sectional plane, which radius is curved opposite to the second contour.

[0033] In particular, two radii are provided, which are positioned on either side of the dome section. Preferably, the radius is mirror-symmetrical in the second sectional plane, and on either side of the dome section, a radius of such a type is provided that transitions into the respective second contour of the first protrusion and the second protrusion. The radii preferably have a curvature opposite to the respective second contour of the corresponding protrusion.

[0034] According to a further embodiment, the dome section has a third contour defining the dome section in a third cutting plane parallel to the first cutting plane and spaced therefrom, which third contour is curved in an arcuate manner at least in sections.

[0035] The third contour can be composed of different radii, elliptical sections, oval sections, curved sections, straight sections, or the like. However, the third contour is always curved in an arcuate manner at least in sections or has an arcuate curvature. The third contour merges into a fourth contour of the third protrusion in the third sectional plane. The fourth contour of the third protrusion is curved in the opposite direction to the third contour of the dome section.

[0036] According to a further embodiment, the driver's cab floor has a lower part, on which the protrusion is formed, and an upper part connected to the lower part at an interface.

[0037] The interface can be a weld seam, for example. Preferably, the lower and upper parts are hot-formed separately using a forming process. For this purpose, for example, a blank, in particular in the form of an armored steel plate, is inserted into a suitable pressing tool, and the lower and upper parts are hot-formed. The two-part design of the driver's cab floor allows for a particularly high degree of forming. The lower and upper parts can then be joined together. Alternatively, the driver's cab floor can also be manufactured as a single piece, so that the lower and upper parts are joined together in one piece, in particular as a single piece.

[0038] According to a further embodiment, the lower part and / or the upper part are each formed in one piece, in particular in one piece of material.

[0039] "Integral" or "single-piece" means that the lower and upper sections are each formed as a single component and are not composed of different parts. "Integral" means that the lower and / or upper sections are each made entirely of the same material. Preferably, both the lower and upper sections are made of armored steel. However, other materials, such as aluminum alloys or fiber composites, can also be used for the cab floor.

[0040] Furthermore, according to claim 13, a commercial vehicle, in particular a military commercial vehicle, with such a driver's cab is proposed.

[0041] The commercial vehicle is preferably a land vehicle, in particular a truck. The commercial vehicle is in particular a military commercial vehicle. The commercial vehicle can therefore also be referred to as a military commercial vehicle. In particular, the commercial vehicle is an off-road truck. The commercial vehicle can be an armored vehicle. The commercial vehicle comprises a chassis frame with a plurality of axles. This means that the commercial vehicle is a multi-axle vehicle, in particular a three-axle vehicle. The commercial vehicle preferably comprises all-wheel drive. The commercial vehicle can therefore also be referred to as an all-wheel drive commercial vehicle. The commercial vehicle can be a wheeled vehicle. Alternatively, the commercial vehicle can also be a tracked vehicle.

[0042] The designs and features described for the driver’s cab apply accordingly to the proposed commercial vehicle and vice versa.

[0043] "One" in this case is not necessarily limited to a single element; rather, multiple elements, such as two, three, or more, may also be included. Any other counting term used here should also not be understood as implying a limitation to the exact number of elements stated. Rather, numerical deviations upwards and downwards are possible unless otherwise stated.

[0044] Further advantageous configurations and aspects of the driver's cab and / or the commercial vehicle are the subject of the dependent claims and the exemplary embodiments of the driver's cab and / or the commercial vehicle described below. The driver's cab and / or the commercial vehicle are explained in more detail below using preferred embodiments with reference to the attached figures. Fig. 1 shows a schematic side view of an embodiment of a commercial vehicle; Fig. 2 shows a schematic front view of an embodiment of a driver's cab for the commercial vehicle according to Fig. 1 ; Fig. 3 shows a schematic sectional view of the driver's cab along the section line III-III of Fig. 2 ; Fig. 4 shows a schematic perspective view of an embodiment of a cab floor for the cab according to Fig. 2 ; Fig. 5 shows a schematic side view of the cab floor according to Fig. 4 ; Fig. 6 shows a schematic sectional view of the cab floor along section line VI-VI of Fig. 5 ; Fig. 7 shows a schematic front view of the cab floor according to Fig. 4 ; Fig. 8 shows a schematic sectional view of the cab floor along the section line VIII-VIII of the Fig. 7 ; and Fig. 9 shows a further schematic sectional view of the cab floor according to the section line IX-IX of Fig. 7 .

[0045] In the figures, identical or functionally equivalent elements are provided with the same reference numerals unless otherwise indicated. Hidden components are shown in the figures with dashed lines.

[0046] The Fig. 1 shows a schematic side view of an embodiment of a commercial vehicle 1. The commercial vehicle 1 is a land vehicle. The commercial vehicle 1 is in particular a military commercial vehicle. The commercial vehicle 1 can therefore also be referred to as a military commercial vehicle. The commercial vehicle 1 can, as in the Fig. 1 shown, be a truck. In particular, the commercial vehicle 1 is an off-road truck. The commercial vehicle 1 may be an armored vehicle.

[0047] The commercial vehicle 1 is assigned a coordinate system with an x-direction or longitudinal direction L, a y-direction or vertical direction H and a z-direction or transverse direction Q. The directions H, L, Q are oriented perpendicular to each other. The vertical direction H is oriented parallel to a direction of gravity g. The direction of gravity g is in the orientation of the Fig. 1 oriented from top to bottom.

[0048] The commercial vehicle 1 comprises a chassis 2 with a chassis frame 3 extending in the longitudinal direction L. The chassis frame 3 is rigid and torsionally flexible and extends from a driver's cab 4 to the rear of the vehicle. "Torsionally flexible" means, in particular, that the chassis frame 3 can twist around the longitudinal direction L.

[0049] A plurality of axles 5 to 7 are provided on the chassis frame 3. The axles 5 to 7 carry wheels 8 to 10. For example, three axles 5 to 7 can be provided. This means that the commercial vehicle 1 is a three-axle vehicle in this case. However, the number of axles 5 to 7 is arbitrary. The commercial vehicle 1 preferably comprises an all-wheel drive. This means that all axles 5 to 7 are driven. The commercial vehicle 1 can therefore also be referred to as an all-wheel drive commercial vehicle. The commercial vehicle 1 can, as shown in the Fig. 1 shown, be a wheeled vehicle. Alternatively, the commercial vehicle 1 can also be a tracked vehicle. The vertical direction H is oriented from the axles 5 to 7 in the direction of the chassis frame 3.

[0050] The chassis 2 is suitable for supporting, in addition to the driver's cab 4, an interchangeable and torsion-resistant superstructure 11 of the commercial vehicle 1. The superstructure 11 can be, for example, a flatbed, a container, a box, a tank, or the like. Fig. 1 a body 11 in the form of a flatbed is shown.

[0051] The driver's cab 4 is preferably protected against gunfire, booby traps, improvised explosive devices (IEDs), mines, or the like. The driver's cab 4 defines an interior space I in which passengers, for example, a driver and a passenger, can be located. The driver's cab 4 encloses the interior space I and thus separates it from an environment U of the driver's cab 4.

[0052] The Fig. 2 shows a schematic front view of an embodiment of a driver's cab 4 for the commercial vehicle 1. The Fig. 3 shows a schematic sectional view of the driver's cab 4 according to the section line III-III of the Fig. 2 . The following refers to the Fig. 2 and 3 referred to at the same time.

[0053] The aforementioned coordinate system with the directions H, L, Q can also be assigned to the driver's cab 4. The driver's cab 4 comprises a mine-protected, in particular mine-protection-optimized, driver's cab floor 12, a ceiling 13 arranged opposite the driver's cab floor 12, two oppositely arranged side walls 14, 15, which can be provided with doors, a front wall 16, and a rear wall 17 arranged opposite the front wall 16. The front wall 16 can have a windshield.

[0054] The driver's cab floor 12, the ceiling 13, the side walls 14, 15, the front wall 16 and the rear wall 17 enclose the interior I. The interior I can be accessible from the surroundings U by means of doors and / or hatches. Accommodated in the driver's cab 4, i.e. arranged in the interior I, are a driver's seat or first seat 18 and a passenger seat or second seat 19. The seats 18, 19 are positioned next to one another and spaced from one another as viewed in the transverse direction Q.

[0055] The Fig. 4 shows a schematic perspective view of an embodiment of a cab floor 12 as mentioned above for the cab 4. The Fig. 5 shows a schematic side view of the cab floor 12. The Fig. 6 shows a schematic sectional view of the cab floor 12 according to the section line VI-VI of the Fig. 5 . The Fig. 7 shows a schematic front view of the cab floor 12, the Fig. 8 shows a further schematic sectional view of the driver's cab floor 12 according to the section line VIII-VIII of the Fig. 7 and the Fig. 9 shows a further schematic sectional view of the cab floor 12 according to the section line IX-IX of the Fig. 7 . The following refers to the Fig. 4 bis 9 referred to at the same time.

[0056] The driver's cab floor 12 comprises a lower part 20 and an upper part 21. The lower part 20 and the upper part 21 are connected to each other at an interface 22. The interface 22 can be a weld seam. This means that the driver's cab floor 12 is made of two parts. Alternatively, the driver's cab floor 12 can also be a single-piece component. "Single-piece" or "one-piece" means in this case that the driver's cab floor 12 is formed from only one part and is not composed of different components. The driver's cab floor 12 can, in particular, also be constructed from a single piece of material. "One-piece" means in this case that the driver's cab floor 12 is made entirely of the same material.

[0057] Preferably, however, the driver's cab floor 12 is formed in two parts and comprises the lower part 20 and the upper part 21 firmly connected thereto. The lower part 20 and the upper part 21 are each designed as one-piece, in particular as single-piece components. The lower part 20 and the upper part 21 are made of steel, in particular armored steel. However, other materials, such as aluminum alloys or fiber composite materials, can also be used for the driver's cab floor 12.

[0058] The driver's cab floor 12 is not flat, but rather has a three-dimensional geometry, in particular in the form of a free-form surface. A "free-form surface" is understood here to mean any three-dimensional surface. A free-form surface can be described, in particular, using piecewise polynomial functions. In particular, free-form surfaces are three-dimensional, usually doubly curved surfaces.

[0059] To manufacture the driver's cab floor 12, the lower part 20 and the upper part 21 are preheated as semi-finished products, particularly as blanks, for example, in the form of armored steel plates. Separately, they are placed in a suitable tool and hot-formed. The lower part 20 and the upper part 21 can then be joined at the interface 22. The two-part design of the driver's cab floor 12 thus enables simpler production of the driver's cab floor 12 while simultaneously achieving high degrees of deformation. The "degree of deformation" is a deformation parameter that can be used to measure the permanent geometric change of a workpiece during the forming process.

[0060] As previously mentioned, the coordinate system with the directions H, L, Q can be assigned to the driver's cab 4. Furthermore, the coordinate system with the directions H, L, Q can also be assigned to the driver's cab floor 12. The vertical direction H and the longitudinal direction L define a first sectional plane E1 ( Fig. 6 , 7 und 8 ), which intersects the driver's cab floor 12 or the driver's cab 4. In this context, "spanning" means that the vertical direction H and the longitudinal direction L define the orientation of the first sectional plane E1 in space. The vertical direction H and the longitudinal direction L can lie in the first sectional plane E1 or run parallel to it.

[0061] Furthermore, the driver's cab floor 12 or the driver's cab 4 is provided with a second cutting plane E2 ( Fig. 5 und 6 ). The second section plane E2 is spanned by the vertical direction H and the transverse direction Q. This means that the vertical direction H and the transverse direction Q lie in the second section plane E2 or are arranged parallel to it. The first section plane E1 and the second section plane E2 are positioned perpendicular to each other.

[0062] Any number of first cutting planes E1 can be provided, which, viewed along the transverse direction Q, can be spaced apart from one another and arranged parallel to one another. Furthermore, any number of second cutting planes E2 can also be provided, which, viewed along the longitudinal direction L, are arranged next to one another and spaced apart from one another. However, only one first cutting plane E1 and one second cutting plane E2 are assumed below.

[0063] Furthermore, a third cutting plane E3 ( Fig. 7 and 9) is provided, which is arranged parallel to the first sectional plane E1 and spaced therefrom. This means that the third sectional plane E3 is also spanned by the vertical direction H and the longitudinal direction L, wherein the vertical direction H and the longitudinal direction L can either be placed in the third sectional plane E3 or are arranged parallel to it. The third sectional plane E3 is provided centrally on the driver's cab floor 12. The driver's cab floor 12 is constructed mirror-symmetrically to the third sectional plane E3.

[0064] The driver's cab floor 12 has a first protrusion 23 formed thereon, which is curved away from the interior I. This means that the first protrusion 23 curves into the surroundings U of the driver's cab 4. Preferably, a first protrusion 23, which is assigned to the first seat 18, and a second protrusion 24, which is assigned to the second seat 19, are provided. Viewed along the vertical direction H, the first seat 18 is arranged above the first protrusion 23. Accordingly, the second seat 19, viewed along the vertical direction H, is arranged above the second protrusion 24. The protrusions 23, 24 are preferably constructed identically. The protrusions 23, 24 are positioned mirror-symmetrically to the third sectional plane E3. The protrusions 23, 24 can also be referred to as curvatures or bulges.

[0065] The protrusions 23, 24 have a three-dimensional, buckling-optimized geometry, so that the protrusions 23, 24 have high rigidity or structural strength. The protrusions 23, 24 are egg-shaped or ovoid-shaped, at least in sections. The terms "egg-shaped" or "ovoid-shaped" in this case refer to a three-dimensional, rounded figure that, in the broadest sense, resembles the profile of a bird's egg. In particular, the egg-shaped geometry can be created by rotating an oval around an axis of symmetry. However, unlike an ellipse, the oval has only one axis of symmetry, to which the oval is mirror-symmetrical. The geometry of the protrusions 23, 24 can also be referred to as an ovoid. The protrusions 23, 24 are integrally formed on the lower part 20 of the driver's cab floor 12.

[0066] Since the protrusions 23, 24 are constructed identically or are arranged mirror-symmetrically to the third sectional plane E3, only the first protrusion 23 will be discussed below. However, all explanations concerning the first protrusion 23 are applicable to the second protrusion 24.

[0067] The first sectional plane E1 runs centrally through the first protrusion 23 with respect to the transverse direction Q. The first protrusion 23 can be constructed at least in sections mirror-symmetrically to the first sectional plane E1. The first protrusion 23 comprises a first contour 25 ( Fig. 8 ), which is arranged in the first sectional plane E1. The first contour 25 can be an inner contour of the first protrusion 23. Alternatively, the first contour 23 can also be an outer contour of the first protrusion 23. The inner contour and outer contour differ from one another only by the wall thickness of the first protrusion 23. A "contour" is understood here to mean a curve which, for an observer when viewed perpendicular to the first sectional plane E1, delimits the first protrusion 23 from its surroundings. The term "contour" can be replaced by the terms "outline" or "curve".

[0068] The first contour 25 is convexly curved. This means that the first protrusion 23 curves out from the interior space I into the surrounding area U. The first contour 25 is curved to the left. The first contour 25 can be composed of different radii, elliptical segments, oval segments, curved segments, straight segments, or the like. However, the first contour 25 is in any case at least partially arcuately curved or has an arcuate curvature.

[0069] However, the first contour 25 is particularly preferably continuously curved, in particular continuously curved in an arc. "Continuously curved" in this case means that the first contour 25 has no straight sections. In the event that the first contour 25 is continuously curved, the first contour 25 is preferably composed exclusively of different curved geometries, such as circular segments, arcs, radii, elliptical segments, oval segments, and / or curved segments. An "arc" can be understood in particular as a circular arc, i.e., a circular segment. The first contour 25 can also be a circular segment, an arc, a radius, an elliptical segment, an oval segment, or a curved segment. In this case, the first contour 25 is not composed of different geometries.

[0070] The first contour 25 has a convex curvature. In this context, "curvature" refers to the local deviation of the first contour 25 from a straight line. The term "curvature" can also be replaced by the term "curvature measure," which quantitatively indicates for each point of the first contour 25 how strong this local deviation from a straight line is. The greater the curvature, the more tightly the first contour 25 is curved.

[0071] The first contour 25 defines the first protrusion 23 in the first sectional plane E1. This means that the first contour 25 specifies a two-dimensional geometry of the first protrusion 23, which results in the first sectional plane E1 when the first sectional plane E1 intersects the first protrusion 23. In the event that a plurality of different first sectional planes E1 are considered, which - as previously mentioned - are arranged parallel to one another, a plurality of first contours 25 arise in these additional first sectional planes E1, which differ from one another in their two-dimensional geometry. The Fig. 8 The first cutting plane E1 shown cuts the first protrusion 23 in its greatest deflection away from the interior space I or into the environment U.

[0072] The first protrusion 23 is further provided with a second contour 26 ( Fig. 6 ), which is arranged in the second sectional plane E2. The second contour 26 can also be an inner contour or an outer contour of the first protrusion 23. The inner contour and outer contour differ from each other only in the wall thickness of the first protrusion 23. Here too, in the case that a plurality of different second sectional planes E2 are considered, which - as previously mentioned - are arranged parallel to each other, a plurality of second contours 26 are obtained in these additional second sectional planes E2, which differ from each other in their two-dimensional geometry. The Fig. 6 The second cutting plane E2 shown cuts the first protrusion 23 in its greatest deflection away from the interior space I or into the environment U.

[0073] Since the first cutting plane E1 and the second cutting plane E2 are perpendicular to each other, the first contour 25 and the second contour 26 are also positioned perpendicular to each other. This results in a doubly curved surface that describes the first protrusion 23. The contours 25, 26 thus form the three-dimensional egg-shaped geometry of the first protrusion 23.

[0074] The second contour 26 can be circularly curved, at least in sections. The second contour 26, like the first contour 25, can be composed of different radii, elliptical sections, oval sections, curved sections, straight sections, or the like. However, the second contour 26 is in any case arcuately curved, at least in sections, or has an arcuate curvature. The second contour 26 has a convex curvature. The second contour 26 is preferably curved to the left. The first contour 25 differs from the second contour 26 in its curvature. In particular, the second contour 26 is more strongly curved than the first contour 25.

[0075] However, the second contour 26 is particularly preferably continuously curved, in particular continuously curved in an arc. "Continuously curved" in this case means that the second contour 26 has no straight sections. In the event that the second contour 26 is continuously curved, the second contour 26 is preferably composed exclusively of different curved geometries, such as circular segments, arcs, radii, elliptical segments, oval segments, and / or curved segments. An "arc" can be understood in particular as a circular arc, i.e., a circular segment. The second contour 26 can also be a circular segment, an arc, a radius, an elliptical segment, an oval segment, or a curved segment. In this case, the second contour 26 is not composed of different geometries.

[0076] Between the first protrusion 23 and the second protrusion 24, a dome section 27 is formed on the driver's cab floor 12, in particular on the upper part 21 of the driver's cab floor 12. The dome section 27 projects inward into the interior I of the driver's cab 4. For example, the dome section 27 can accommodate a transmission tunnel.

[0077] As the Fig. 6 shows, the second contour 26 of the respective protrusion 23, 24 merges into the dome section 27 on both sides of the dome section 27 with a respective radius 28, 29. The radii 28, 29 have an opposite direction of curvature to that of the second contours 26 of the two protrusions 23, 24. Furthermore, the second contour 26 of the two protrusions 23, 24 merges via radii 30, 31 into an edge section 32, 33 of the driver's cab floor 12 adjoining the protrusions 23, 24 on both sides. The radii 30, 31 are curved in the opposite direction to the respective second contour 26.

[0078] In the third section plane E3, a third contour 34 defining the dome section 27 ( Fig. 9 ). The third contour 34 can also be an inner contour or an outer contour, which differ from one another only in the wall thickness of the dome section 27. The third contour 34 can be composed of different radii, elliptical sections, oval sections, curved sections, straight sections, or the like. However, the third contour 34 is in any case at least partially curved in an arcuate manner or has an arcuate curvature.

[0079] Furthermore, a third protrusion 35 is provided centrally between the protrusions 23, 24. The third protrusion 35 is curved less far out of the interior space I than the protrusions 23, 24. The third protrusion 35 is defined by means of a fourth contour 36 placed in the third section plane E3 ( Fig. 9 ) and a fifth contour 37 oriented perpendicular to the fourth contour 36 ( Fig. 7 ). The fifth contour 37 lies in a cutting plane parallel to the second cutting plane E2 (not shown). The contours 36, 37 can also be inner contours or outer contours.

[0080] The contours 36, 37 can each be composed of different radii, elliptical sections, oval sections, curved sections, straight sections, or the like. However, both the fourth contour 36 and the fifth contour 37 are in any case at least partially curved in an arcuate manner or have an arcuate curvature. The fourth contour 36 merges into the third contour 34 of the dome section 27. The fourth contour 36 and the third contour 34 are curved in opposite directions.

[0081] The functionality of the driver's cab floor 12 is explained below. If the driver's cab 4 is detonated with an explosive device 38 ( Fig. 2and 3 ), for example in the form of a mine or an IED, the respective protrusion 23, 24 protects the driver or passenger from a blast or pressure wave 39 of the explosive device 38. The protection is provided by the previously explained three-dimensional geometry of the protrusions 23, 24. Due to their three-dimensional geometry, the protrusions 23, 24 are buckling-optimized and have a high degree of rigidity or structural rigidity. This prevents the driver's cab floor 12, particularly under the seats 18, 19, from deforming into the interior I, which could lead to injury to the occupants.

[0082] Due to the partially ovoid geometry of the respective protrusions 23, 24, high structural rigidity can be achieved without additional material in the form of thickenings, ribs, and / or stiffening elements. The geometry of the protrusions 23, 24 exhibits high inherent rigidity due to their ovoid shape. At the same time, a low wall thickness can be achieved for the driver's cab floor 12. This results in weight savings.

[0083] This avoids additional weight due to thickened portions, ribs, and / or stiffening elements, additional processing steps and the resulting additional costs, and deteriorated material properties due to heat input when welding additional material. The driver's cab floor 12 can fully achieve the required safety level when exposed to explosive detonation using the explosive device 38 under the given geometric boundary conditions. LIST OF REFERENCE SYMBOLS

[0084] 1Commercial vehicle 2Chassis 3Chassis frame 4Driver's cab 5Axle 6Axle 7Axle 8Wheel 9Wheel 10Wheel 11Body 12Driver's cab floor 13Ceiling 14Side wall 15Side wall 16Front wall 17Rear wall 18Seat 19Seat 20Lower section 21Upper section 22Interface 23Protrusion 24Protrusion 25Contour 26Contour 27Coupling section 28Radius 29Radius 30Radius 31Radius 32Edge section 33Edge section 34Contour 35Protrusion 36Contour 37Contour 38Explosive device 39Blast wave E1Section plane E2Section plane E3Section plane gDirection of gravity IInterior HVertical direction LLongitudinal direction QTransverse direction UMurroundings

Claims

1. Driver's cab (4) for a utility vehicle (1), in particular for a military utility vehicle, comprising an interior space (I) enclosed by the driver's cab (4), a driver's cab floor (12), a first protrusion (23) formed on the driver's cab floor (12) and a second protrusion (24) formed on the driver's cab floor (12), wherein the first protrusion (23) and the second protrusion (24) are curved away from the interior space (I) such that the first protrusion (23) and the second protrusion (24) extend away from the interior space (I) and extend into a surroundings (U) of the driver's cab (4), wherein the first protrusion (23) and the second protrusion (24) each comprise a first contour (25) defining the first protrusion (23) and the second protrusion (24) in a first sectional plane (E1) intersecting the driver's cab floor (12), wherein the first contour (25) is curved in an arcuate manner at least in sections, wherein the first protrusion (23) and the second protrusion (24) each comprise a second contour (26) defining the first protrusion (23) and the second protrusion (24) in a second sectional plane (E2) intersecting the driver's cab floor (12), wherein the second contour (26) is curved in an arcuate manner at least in sections, and wherein the first sectional plane (E1) and the second sectional plane (E2) are positioned perpendicular to each other, wherein the first protrusion (23) and the second protrusion (24) are arranged at a distance from each other, wherein a third protrusion (35) is formed on the driver's cab floor (12), wherein the third protrusion (35) is curved away from the interior space (I), and wherein the third protrusion (35) is arranged between the first protrusion (23) and the second protrusion (24).

2. Driver's cab according to claim 1, characterized in that a height direction (H) of the driver's cab (4) and a longitudinal direction (L) of the driver's cab (4) span the first sectional plane (E1), wherein the height direction (H) and a cross direction (Q) of the driver's cab (4) span the second sectional plane (E2), and wherein the height direction (H), the longitudinal direction (L) and the cross direction (Q) are positioned perpendicular to each other.

3. Driver's cab according to claim 2, characterized in that the first sectional plane (E1) and the second sectional plane (E2) each intersect the first protrusion (23) and the second protrusion (24) centrally.

4. Driver's cab according to one of claims 1 - 3, characterized in that the first contour (25) is continuously curved, and / or wherein the second contour (26) is continuously curved.

5. Driver's cab according to one of claims 1 - 4, characterized in that the first protrusion (23) and the second protrusion (24) are at least partially egg-shaped.

6. Driver's cab according to one of claims 1 - 5, characterized in that the first contour (25) differs in its curvature from the second contour (26).

7. Driver's cab according to one of claims 1 - 6, characterized in that the second contour (26) is more curved than the first contour (25).

8. Driver's cab according to one of claims 1 - 7, characterized in that a dome section (27) projecting into the interior space (I) is formed on the driver's cab floor (12) and is arranged between the first protrusion (23) and the second protrusion (24).

9. Driver's cab according to claim 8, characterized in that the dome section (27) comprises a radius (28, 29) defining the dome section (27) in the second sectional plane (E2), wherein the radius (28, 29) is curved in the opposite direction to the second contour (26).

10. Driver's cab according to claim 8 or 9, characterized in that the dome section (27) comprises a third contour (34) defining the dome section (27) in a third sectional plane (E3) parallel to the first sectional plane (E1) and arranged at a distance therefrom, wherein the third contour (34) is curved at in an arcuate manner at least in sections.

11. Driver's cab according to one of claims 1 - 10, characterized in that the driver's cab floor (12) comprises a lower part (20), on which the first protrusion (23) and the second protrusion (24) are formed, and an upper part (21) connected to the lower part (20) at an interface (22).

12. Driver's cab according to claim 11, characterized in that the lower part (20) and / or the upper part (21) are each formed integrally, in particular as one piece of material.

13. Utility vehicle (1), in particular military utility vehicle, comprising a driver's cab (4) according to one of claims 1 - 12.

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