EP1821061B1 - Floor protection device for a vehicle - Google Patents

Floor protection device for a vehicle Download PDF

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Publication number
EP1821061B1
EP1821061B1 EP07290177A EP07290177A EP1821061B1 EP 1821061 B1 EP1821061 B1 EP 1821061B1 EP 07290177 A EP07290177 A EP 07290177A EP 07290177 A EP07290177 A EP 07290177A EP 1821061 B1 EP1821061 B1 EP 1821061B1
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EP
European Patent Office
Prior art keywords
caisson
protection device
floor
lateral walls
vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP07290177A
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German (de)
French (fr)
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EP1821061A1 (en
Inventor
Yves Barbe
Benoît Bettencourt
Laurent Wagnez
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Nexter Systems SA
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Nexter Systems SA
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Publication date
Application filed by Nexter Systems SA filed Critical Nexter Systems SA
Priority to PL07290177T priority Critical patent/PL1821061T3/en
Publication of EP1821061A1 publication Critical patent/EP1821061A1/en
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Publication of EP1821061B1 publication Critical patent/EP1821061B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H7/00—Armoured or armed vehicles
    • F41H7/02—Land vehicles with enclosing armour, e.g. tanks
    • F41H7/04—Armour construction
    • F41H7/042—Floors or base plates for increased land mine protection

Definitions

  • the technical field of the invention is that of devices for protecting a floor of a land vehicle against mines.
  • shielding In order to protect the floor of a land vehicle, it is known to arrange a shielding therein for absorbing and / or deflecting the breath produced by the mine.
  • Known shields comprise one or more metal or composite layers and possibly deflector means.
  • the DE10144208 thus describes a shield comprising a convex box covering the floor of the vehicle.
  • the shape of the box ensures a diversion of a part of the breath of a mine.
  • shields or known protection devices usually have a constant thickness over the entire width to be protected and defined according to the maximum stresses generated by the mine. This results in a large mass for the armor which penalizes the mobility of the vehicle. This also results in reduced ground clearance.
  • the patent is also known WO 2007/020531 which was published on 22/02/2007 and describes a device for protecting the floor of a vehicle.
  • This device consists of a box whose side walls are resistant to the bottom wall so as to cause the deformation of the side walls to gradually flatten the box.
  • the subject of the invention is a device for protecting a floor of a land vehicle against mines, a device comprising at least one box having a convex external surface oriented towards the ground, the box comprising a massive middle part arranged between two side walls and extending over the entire length of the box, the combination of the side walls and the median part giving the overall convex shape of the box, shape to deflect part of the breath during the detonation of a mine, the medial part having a thickness (E) greater than that (e) of the side walls and being designed so as to transmit, during the detonation of the mine, the forces towards the side walls so as to cause deformation of the walls; lateral leading to a progressive flattening of the box towards the floor, characterized in that the middle part is formed by a distinct central piece which is secured to the side walls by fastening means, the middle piece being in contact with the side walls by bearing surfaces.
  • the median part may comprise at least one internal cavity.
  • the middle portion and the side walls may constitute a one-piece assembly.
  • the box may have at least one internal partition.
  • the box may also contain at least one block of damping material.
  • the box may constitute an element attached to a vehicle.
  • the box may itself be part of the structure of a lower part of a vehicle.
  • the figure 1a shows a vehicle 1 which has a cabin 2 carried by wheels 3 which are connected to the cab by axle arms 4. It is shown on the figure 1a a blast mine 5 placed on the ground 6. This mine generates during its initiation a strong pressure (shown by the arrows p) towards a floor 7 of the vehicle 1.
  • the device is shown here in the form of a separate box which is attached to the lower part of the vehicle 1.
  • box 8 in the sense of the invention will therefore be understood a structure delimited by walls and which itself delimits an internal volume 9.
  • This structure can be reported to an existing vehicle to achieve an over protection. It may also be defined, from the design of the vehicle, as a constituent part of a cabin or floor of the vehicle.
  • the box 8 has an external surface which is convex and oriented towards the ground 6.
  • This box further comprises a median portion 10 which is disposed between two side walls 11a, 11b.
  • This middle portion has a thickness E which is greater than the thicknesses e of the side walls 11a and 11b.
  • the side walls 11a and 11b are thus constituted by sheets (for example of steel) while the median part is formed here by a piece 10 (for example of steel), obtained by machining or foundry, and which is made integral with the walls.
  • lateral 11a 11b by fastening means, for example by welding.
  • the piece 10 extends over the entire length L of the box 8.
  • the box 8 is delimited at its front and rear faces by closure plates 12a and 12b made of steel, welded to the walls 11a and 11b. It is of course possible to lighten the device not to provide closure plates 12a, 12b (especially when the box is an over-protection reported).
  • the part 10 is connected to the walls 11a, 11b by bearing surfaces 13 which will be inclined relative to the vertical (see Figure la).
  • the box 8 will be given a length L equal to that of the part of the vehicle that is primarily to be protected. It will be possible eventually to have a well 8 whose total length will be equal to the length of the vehicle 1.
  • the box according to the invention has a behavior during the detonation of a mine which is totally different from that of the known convex boxes.
  • the known caissons partly deflect the breath of the mine thanks to their convexity but they must be sufficiently resistant mechanically to avoid any tearing of the sheets of the box. This results in thick and heavy boxes.
  • the box according to the invention comprises a median solid part 10 which resists tearing and which transmits to the side walls part of the shock received. This transmission is via the bearing surfaces 13 connecting the side walls to the part 10.
  • the main force received vertically at the portion 10, is transmitted to the walls 11a, 11b and it causes a deformation of the latter and a progressive flattening of the box 8 in the direction of the floor 7.
  • This mechanical deformation has a slower kinematics than that of constant thickness boxes. It allows to consume the energy communicated by the mine and thus ensures the protection of the floor.
  • the side walls 11a and 11b may be thinner because they are located at a distance from the middle part which is the one most solicited by the effects of a mine.
  • the bearing surfaces 13 represented on the figure 1a are flat surfaces substantially perpendicular to the side walls 11a and 11b.
  • the figure 1b shows thus substantially horizontal bearing surfaces 13 which are formed by grooves 14 provided on each side of the part 10 and on which beveled ends of the side walls 11a, 11b.
  • the skilled person will size the side walls 11a, 11b and the piece 10 according to the characteristics of the mine threat against which he wants to protect the vehicle and according to the characteristics of the vehicle itself.
  • the surface density of the box according to the invention can be reduced compared to that of known boxes having a constant thickness. This results in a reduced overall mass for protection.
  • box 8 associating steel side walls 11a, 11b and a central piece 10 also made of steel. It is of course possible to implement different materials. We can for example make a box 8 of non-magnetic materials such as aluminum, aluminum alloys, titanium. It would also be possible to make the casing 8 partially made of composite materials. These solutions would lighten the box even further and reduce its magnetic signature.
  • the internal volume 9 of the box 8 may allow to house the mechanical parts of the vehicle, for example a transmission shaft.
  • the outer shape of the piece 10 may also be different from a triangular shape. We can adopt a part 10 whose outer profile is rounded for example cylindrical or hyperbolic.
  • FIG 3 shows another embodiment of the invention in which the casing 8 has internal partitions 15 which allow to stiffen it. These partitions have a profile similar to that of the closure plates 12a, 12b and they bear on both the side walls 11a, 11b and on the part 10.
  • the partitions 15 will for example be made in the form of sheets welded to the walls 11a, 11b. Such an embodiment makes it possible to define between each pair of partitions, different zones of deformation for the structure of the box.
  • the blocks may be made of a cellular material (such as a honeycomb).
  • the blocks may be made of metallic material or of organic or composite material.
  • the figure 4 shows two blocks 16 disposed at a front portion of the box 8.
  • the two housing delimited by partitions 15 at the rear of the box 8 are free of blocks. It is thus possible to provide damping blocks 16 only at a zone of the box 8 that is particularly sought to strengthen.
  • FIGS. 5a and 5b show another embodiment of the invention in which the casing 8 comprises a median part 10 which is lightened. This part 10 thus has cavities 17 regularly distributed over its length.
  • the skilled person will easily size the number, shape, dimensions and distribution of the cavities 17 on the part 10 according to the desired stiffness characteristics.
  • the cavities 17 may be made by machining or obtained by casting during the manufacture of the part 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Body Structure For Vehicles (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Vehicle Body Suspensions (AREA)
  • Vibration Prevention Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Seal Device For Vehicle (AREA)

Abstract

The device has a shell (8) comprising an external convex surface oriented towards ground, and a median part (10) disposed between two lateral walls (11a, 11b). The median part is extended on entire length of the shell and transmits the force towards the lateral walls during detonation of mine (5), where the thickness (E) of the median part is greater than the thickness (e) of the lateral wall.

Description

Le domaine technique de l'invention est celui des dispositifs permettant d'assurer la protection d'un plancher de véhicule terrestre contre les mines.The technical field of the invention is that of devices for protecting a floor of a land vehicle against mines.

Pour protéger le plancher d'un véhicule terrestre il est connu de disposer sous celui-ci un blindage permettant d'absorber et/ou de dévier le souffle produit par la mine. Les blindages connus comprennent une ou plusieurs couches métalliques ou composites et éventuellement des moyens déflecteurs.In order to protect the floor of a land vehicle, it is known to arrange a shielding therein for absorbing and / or deflecting the breath produced by the mine. Known shields comprise one or more metal or composite layers and possibly deflector means.

Le brevet DE10144208 décrit ainsi un blindage comportant un caisson convexe recouvrant le plancher du véhicule. La forme du caisson assure une déviation d'une partie du souffle d'une mine.The DE10144208 thus describes a shield comprising a convex box covering the floor of the vehicle. The shape of the box ensures a diversion of a part of the breath of a mine.

Ces blindages ou dispositifs de protections connus ont habituellement une épaisseur constante sur l'ensemble de la largeur à protéger et définie en fonction des contraintes maximales engendrées par la mine. Il en résulte une masse importante pour le blindage qui pénalise la mobilité du véhicule. Il en résulte également une garde au sol réduite.These shields or known protection devices usually have a constant thickness over the entire width to be protected and defined according to the maximum stresses generated by the mine. This results in a large mass for the armor which penalizes the mobility of the vehicle. This also results in reduced ground clearance.

On connaît par le brevet WO 03/102489 un dispositif de protection de plancher comprenant différents éléments fixés par boulonnage (deux poutres longitudinales, des poutres transversales, des poutres obliques latérales, des plaques de blindage). Dans un tel dispositif il y a plusieurs plaques de blindage fixées aux poutres et qui couvrent des zones de dimensions réduites bien localisées. L'architecture n'est pas optimisée du point de vue de la transmission des efforts.We know by the patent WO 03/102489 a floor protection device comprising various elements fastened by bolting (two longitudinal beams, transverse beams, lateral oblique beams, armor plates). In such a device there are several shielding plates attached to the beams and which cover small areas well localized. The architecture is not optimized from the point of view of the transmission of efforts.

On connaît également le brevet WO 2007/020531 qui a été publié le 22/02/2007 et qui décrit un dispositif de protection du plancher d'un véhicule. Ce dispositif est constitué d'un caisson dont les parois latérales sont résistante que la paroi de fond de façon à provoquer la déformation des parois latérales pour aplatir progressivement le caisson.The patent is also known WO 2007/020531 which was published on 22/02/2007 and describes a device for protecting the floor of a vehicle. This device consists of a box whose side walls are resistant to the bottom wall so as to cause the deformation of the side walls to gradually flatten the box.

C'est le but de l'invention que de proposer un dispositif de protection permettant d'assurer, avec une masse totale relativement réduite, une protection efficace des planchers ou des parties basses des véhicules contre les effets des mines et notamment des mines à effet de souffle.It is the object of the invention to provide a protective device for ensuring, with a relatively small total mass, effective protection of the floors or the lower parts of the vehicles against the effects of mines and in particular effect mines of breath.

Ainsi, l'invention a pour objet un dispositif de protection d'un plancher d'un véhicule terrestre contre les mines, dispositif comprenant au moins un caisson présentant une surface externe convexe orientée vers le sol, le caisson comportant une partie médiane massive disposée entre deux parois latérales et s'étendant sur toute la longueur du caisson, l'association des parois latérales et de la partie médiane donnant la forme convexe globale du caisson, forme permettant de dévier une partie du souffle lors de la détonation d'une mine, la partie médiane ayant par ailleurs une épaisseur (E) supérieure à celle (e) des parois latérales et étant conçue de façon à transmettre, lors de la détonation de la mine, les efforts vers les parois latérales de façon à provoquer une déformation des parois latérales conduisant à un aplatissement progressif du caisson en direction du plancher, caractérisé en ce que la partie médiane est formée par une pièce médiane distincte qui est rendue solidaire des parois latérales par des moyens de fixation, la pièce médiane étant en contact avec les parois latérales par des surfaces d'appui.Thus, the subject of the invention is a device for protecting a floor of a land vehicle against mines, a device comprising at least one box having a convex external surface oriented towards the ground, the box comprising a massive middle part arranged between two side walls and extending over the entire length of the box, the combination of the side walls and the median part giving the overall convex shape of the box, shape to deflect part of the breath during the detonation of a mine, the medial part having a thickness (E) greater than that (e) of the side walls and being designed so as to transmit, during the detonation of the mine, the forces towards the side walls so as to cause deformation of the walls; lateral leading to a progressive flattening of the box towards the floor, characterized in that the middle part is formed by a distinct central piece which is secured to the side walls by fastening means, the middle piece being in contact with the side walls by bearing surfaces.

La pièce médiane pourra comporter au moins une cavité interne.The median part may comprise at least one internal cavity.

Selon un autre mode de réalisation, la partie médiane et les parois latérales pourront constituer un ensemble monobloc.According to another embodiment, the middle portion and the side walls may constitute a one-piece assembly.

Dans tous les modes de réalisation, le caisson pourra présenter au moins une cloison interne.In all embodiments, the box may have at least one internal partition.

Le caisson pourra également renfermer au moins un bloc de matériau amortisseur.The box may also contain at least one block of damping material.

Selon un mode de mise en oeuvre de l'invention, le caisson pourra constituer un élément rapporté sur un véhicule.According to one embodiment of the invention, the box may constitute an element attached to a vehicle.

Selon un autre mode de mise en oeuvre, le caisson pourra lui-même constituer une partie de la structure même d'une partie basse d'un véhicule.According to another embodiment, the box may itself be part of the structure of a lower part of a vehicle.

L'invention sera mieux comprise à la lecture de la description qui va suivre de différents modes de réalisation, description faite en référence aux dessins annexés et dans lesquels :

  • la figure 1a représente schématiquement un véhicule passant au-dessus d'une mine, véhicule équipé d'un dispositif de protection de plancher selon l'invention,
  • la figure 1b est une vue de détail d'un mode de réalisation des surfaces d'appui,
  • la figure 2 représente en vue de dessus (vue suivant la flèche F repérée figure 1a) un premier mode de réalisation d'un dispositif de protection selon l'invention,
  • les figures 3 et 4 montrent, également en vue de dessus, deux autres modes de réalisation du dispositif selon l'invention,
  • les figures 5a et 5b montrent un autre mode de réalisation de l'invention, la figure 5b étant une vue de dessus et la figure 5a une vue en coupe transversale, coupe réalisée suivant le plan AA dont la trace est visible à la figure 5a.
The invention will be better understood on reading the following description of various embodiments, a description given with reference to the appended drawings and in which:
  • the figure 1a schematically represents a vehicle passing over a mine, vehicle equipped with a floor protection device according to the invention,
  • the figure 1b is a detail view of an embodiment of the bearing surfaces,
  • the figure 2 represents in top view (view along the arrow F spotted figure 1a ) a first embodiment of a protection device according to the invention,
  • the Figures 3 and 4 show, also in plan view, two other embodiments of the device according to the invention,
  • the Figures 5a and 5b show another embodiment of the invention, the figure 5b being a view from above and the figure 5a a cross-sectional view, section taken along the plane AA whose trace is visible at the figure 5a .

La figure 1a montre un véhicule 1 qui comporte une cabine 2 portée par des roues 3 qui sont reliées à la cabine par des bras d'essieu 4. On a représenté sur la figure 1a une mine 5 à effet de souffle posée sur le sol 6. Cette mine engendre lors de son initiation une forte pression (schématisée par les flèches p) en direction d'un plancher 7 du véhicule 1.The figure 1a shows a vehicle 1 which has a cabin 2 carried by wheels 3 which are connected to the cab by axle arms 4. It is shown on the figure 1a a blast mine 5 placed on the ground 6. This mine generates during its initiation a strong pressure (shown by the arrows p) towards a floor 7 of the vehicle 1.

Conformément à l'invention, on prévoit un dispositif 8 permettant d'assurer la protection du plancher 7 (ou d'une partie basse du véhicule).According to the invention, there is provided a device 8 for providing protection of the floor 7 (or a lower part of the vehicle).

Le dispositif est représenté ici sous la forme d'un caisson distinct qui est fixé à la partie inférieure du véhicule 1.The device is shown here in the form of a separate box which is attached to the lower part of the vehicle 1.

Il est bien entendu possible, sans sortir du cadre de l'invention, de définir un véhicule dont la structure même incorporera dès la conception le dispositif 8 incorporé à la cabine 2. Le caisson 8 pourra ainsi être incorporé au plancher lui-même.It is of course possible, without departing from the scope of the invention, to define a vehicle whose structure itself incorporates the design device 8 incorporated in the cabin 2. The box 8 may thus be incorporated in the floor itself.

Par caisson 8 au sens de l'invention on entendra donc une structure délimitée par des parois et qui délimite elle-même un volume interne 9. Cette structure pourra être rapportée à un véhicule existant pour réaliser une sur protection. Elle pourra aussi être définie, dès la conception du véhicule, comme une partie constitutive d'une cabine ou d'un plancher du véhicule.By box 8 in the sense of the invention will therefore be understood a structure delimited by walls and which itself delimits an internal volume 9. This structure can be reported to an existing vehicle to achieve an over protection. It may also be defined, from the design of the vehicle, as a constituent part of a cabin or floor of the vehicle.

Conformément à l'invention le caisson 8 présente une surface externe qui est convexe et orientée vers le sol 6.According to the invention, the box 8 has an external surface which is convex and oriented towards the ground 6.

Ce caisson comporte par ailleurs une partie médiane 10 qui est disposée entre deux parois latérales 11a, 11b.This box further comprises a median portion 10 which is disposed between two side walls 11a, 11b.

Cette partie médiane a une épaisseur E qui est supérieure aux épaisseurs e des parois latérales 11a et 11b.This middle portion has a thickness E which is greater than the thicknesses e of the side walls 11a and 11b.

Les parois latérales 11a et 11b sont ainsi constituées par des tôles (par exemple en acier) alors que la partie médiane est formée ici par une pièce 10 (par exemple en acier), obtenue par usinage ou fonderie, et qui est rendue solidaire des parois latérales 11a 11b par des moyens de fixation, par exemple par soudure.The side walls 11a and 11b are thus constituted by sheets (for example of steel) while the median part is formed here by a piece 10 (for example of steel), obtained by machining or foundry, and which is made integral with the walls. lateral 11a 11b by fastening means, for example by welding.

Comme cela est plus particulièrement visible sur la figure 2, qui est une vue de dessus du caisson suivant la flèche F repérée figure 1a, la pièce 10 s'étend sur toute la longueur L du caisson 8.As this is particularly visible on the figure 2 , which is a view from above of the box according to the spotted arrow F figure 1a , the piece 10 extends over the entire length L of the box 8.

Par ailleurs le caisson 8 est délimité au niveau de ses faces avant et arrière par des plaques de fermeture 12a et 12b en acier, soudées aux parois 11a et 11b. Il est bien entendu possible pour alléger le dispositif de ne pas prévoir de plaques de fermeture 12a,12b (notamment lorsque le caisson est une surprotection rapportée).Furthermore, the box 8 is delimited at its front and rear faces by closure plates 12a and 12b made of steel, welded to the walls 11a and 11b. It is of course possible to lighten the device not to provide closure plates 12a, 12b (especially when the box is an over-protection reported).

La pièce 10 est reliée aux parois 11a, 11b par des surfaces d'appui 13 qui seront inclinées par rapport à la verticale (voir figure la).The part 10 is connected to the walls 11a, 11b by bearing surfaces 13 which will be inclined relative to the vertical (see Figure la).

On donnera au caisson 8 une longueur L égale à celle de la partie du véhicule que l'on cherche prioritairement à protéger. On pourra éventuellement avoir ainsi un caisson 8 dont la longueur totale sera égale à la longueur du véhicule 1.The box 8 will be given a length L equal to that of the part of the vehicle that is primarily to be protected. It will be possible eventually to have a well 8 whose total length will be equal to the length of the vehicle 1.

En proposant ainsi de donner au caisson 8 une épaisseur en partie médiane E qui est supérieure à celle des parois latérales 11a,11b on améliore la résistance du caisson tout en l'allégeant. En effet les parois latérales sont plus éloignées du sol que la partie médiane et elles sont inclinées. Il est donc possible de les alléger par rapport à la partie médiane.By proposing to give the box 8 a thickness in the middle part E which is greater than that of the side walls 11a, 11b improves the strength of the box while reducing it. Indeed the side walls are further from the ground than the middle part and they are inclined. It is therefore possible to lighten them compared to the middle part.

Le caisson selon l'invention a un comportement lors de la détonation d'une mine qui est totalement différent de celui des caissons convexes connus.The box according to the invention has a behavior during the detonation of a mine which is totally different from that of the known convex boxes.

Les caissons connus dévient en partie le souffle de la mine grâce à leur convexité mais ils doivent être suffisamment résistants mécaniquement pour éviter tout déchirement des tôles du caisson. Il en résulte des caissons épais et lourds.The known caissons partly deflect the breath of the mine thanks to their convexity but they must be sufficiently resistant mechanically to avoid any tearing of the sheets of the box. This results in thick and heavy boxes.

Le caisson selon l'invention comporte une partie massive médiane 10 qui résiste au déchirement et qui transmet aux parois latérales une partie du choc reçu. Cette transmission se fait via les surfaces d'appui 13 reliant les parois latérales à la partie 10.The box according to the invention comprises a median solid part 10 which resists tearing and which transmits to the side walls part of the shock received. This transmission is via the bearing surfaces 13 connecting the side walls to the part 10.

Si une partie du souffle est déviée par la forme convexe, l'effort principal, reçu verticalement au niveau de la partie 10, est transmis aux parois 11a, 11b et il provoque une déformation de ces dernières ainsi qu'un aplatissement progressif du caisson 8 en direction du plancher 7.If a part of the breath is deflected by the convex shape, the main force, received vertically at the portion 10, is transmitted to the walls 11a, 11b and it causes a deformation of the latter and a progressive flattening of the box 8 in the direction of the floor 7.

Cette déformation mécanique a une cinématique plus lente que celle des caissons à épaisseur constante. Elle permet de consommer l'énergie communiquée par la mine et assure ainsi la protection du plancher.This mechanical deformation has a slower kinematics than that of constant thickness boxes. It allows to consume the energy communicated by the mine and thus ensures the protection of the floor.

Les parois latérales 11a et 11b peuvent donc être plus minces car elles se situent à distance de la partie médiane qui est celle la plus sollicitée par les effets d'une mine.The side walls 11a and 11b may be thinner because they are located at a distance from the middle part which is the one most solicited by the effects of a mine.

Les surfaces d'appui 13 représentées sur la figure 1a sont des surfaces planes sensiblement perpendiculaires aux parois latérales 11a et 11b.The bearing surfaces 13 represented on the figure 1a are flat surfaces substantially perpendicular to the side walls 11a and 11b.

Il est bien entendu possible de donner aux surfaces d'appui une autre forme ou orientation facilitant la fixation par soudure de la pièce 10 ainsi que la transmission des efforts.It is of course possible to give the bearing surfaces another shape or orientation facilitating the attachment by welding of the part 10 and the transmission of forces.

La figure 1b montre ainsi des surfaces d'appui 13 sensiblement horizontales qui sont formées par des rainures 14 aménagées sur chaque côté de la pièce 10 et sur lesquelles s'appliquent des extrémités biseautées des parois latérales 11a,11b.The figure 1b shows thus substantially horizontal bearing surfaces 13 which are formed by grooves 14 provided on each side of the part 10 and on which beveled ends of the side walls 11a, 11b.

L'Homme du Métier dimensionnera les parois latérales 11a, 11b et la pièce 10 en fonction des caractéristiques de la menace mine contre laquelle il veut protéger le véhicule ainsi qu'en fonction des caractéristiques du véhicule lui-même.The skilled person will size the side walls 11a, 11b and the piece 10 according to the characteristics of the mine threat against which he wants to protect the vehicle and according to the characteristics of the vehicle itself.

Il est ainsi possible de réaliser des caissons 8 dont la hauteur H est plus réduite que celle des caissons de déviation de souffle connus. La garde au sol du véhicule se trouve donc améliorée.It is thus possible to make boxes 8 whose height H is smaller than that of the boxes of breath diversion known. The ground clearance of the vehicle is therefore improved.

A capacité de protection équivalente, la masse surfacique du caisson selon l'invention peut être ainsi réduite par rapport à celle des caissons connus ayant une épaisseur constante. Il en résulte une masse globale réduite pour la protection.With equivalent protection capacity, the surface density of the box according to the invention can be reduced compared to that of known boxes having a constant thickness. This results in a reduced overall mass for protection.

On a décrit un caisson 8 associant des parois latérales 11a, 11b en acier et une pièce médiane 10 également en acier. Il est bien entendu possible de mettre en oeuvre des matériaux différents. On pourra par exemple réaliser un caisson 8 en matériaux amagnétiques comme par exemple l'aluminium, les alliages d'aluminium, le titane. On pourrait également réaliser le caisson 8 partiellement en matériaux composites. Ces solutions permettraient d'alléger encore plus le caisson et de diminuer sa signature magnétique.There is described a box 8 associating steel side walls 11a, 11b and a central piece 10 also made of steel. It is of course possible to implement different materials. We can for example make a box 8 of non-magnetic materials such as aluminum, aluminum alloys, titanium. It would also be possible to make the casing 8 partially made of composite materials. These solutions would lighten the box even further and reduce its magnetic signature.

Le volume interne 9 du caisson 8 pourra permettre d'abriter des organes mécaniques du véhicule, par exemple un arbre de transmission.The internal volume 9 of the box 8 may allow to house the mechanical parts of the vehicle, for example a transmission shaft.

La forme externe de la pièce 10 peut également être différente d'une forme triangulaire. On pourra adopter une pièce 10 dont le profil externe est arrondi par exemple cylindrique ou hyperbolique.The outer shape of the piece 10 may also be different from a triangular shape. We can adopt a part 10 whose outer profile is rounded for example cylindrical or hyperbolic.

Il est également possible de réaliser un caisson monobloc dont la partie médiane 10 sera réalisée d'une seule pièce avec les parois latérales 11a,11b. Le caisson 8 sera alors monobloc et obtenu par exemple par fonderie ou usinage.It is also possible to make a monobloc housing whose middle portion 10 will be made in one piece with the side walls 11a, 11b. The casing 8 will then be monobloc and obtained for example by casting or machining.

La figure 3 montre un autre mode de réalisation de l'invention dans lequel le caisson 8 comporte des cloisons internes 15 qui permettent de le rigidifier. Ces cloisons ont un profil analogue à celui des plaques de fermeture 12a, 12b et elles sont en appui à la fois sur les parois latérales 11a, 11b et sur la pièce 10.The figure 3 shows another embodiment of the invention in which the casing 8 has internal partitions 15 which allow to stiffen it. These partitions have a profile similar to that of the closure plates 12a, 12b and they bear on both the side walls 11a, 11b and on the part 10.

Les cloisons 15 seront par exemple réalisées sous la forme de tôles soudées aux parois 11a,11b. Un tel mode de réalisation permet de délimiter entre chaque paire de cloisons, des zones de déformation différentes pour la structure du caisson.The partitions 15 will for example be made in the form of sheets welded to the walls 11a, 11b. Such an embodiment makes it possible to define between each pair of partitions, different zones of deformation for the structure of the box.

Afin d'augmenter encore le niveau de protection, il est possible, comme représenté à la figure 4, de disposer entre deux cloisons 15 un ou plusieurs blocs 16 d'un matériau compressible. On pourra par exemple réaliser les blocs en un matériau alvéolaire (tel qu'un nid d'abeille). Les blocs pourront être en matériau métallique ou bien en matériau organique ou composite.In order to further increase the level of protection, it is possible, as shown in figure 4 , to have between two partitions 15 one or more blocks 16 of a compressible material. For example, the blocks may be made of a cellular material (such as a honeycomb). The blocks may be made of metallic material or of organic or composite material.

Il est bien entendu possible de prévoir un ou plusieurs blocs 16 dans un caisson dépourvu de cloisons 15 (caisson tel que représenté à la figure 2). Dans ce cas le ou les blocs 16 seront fixés au caisson 8, par exemple par collage sur les parois latérales 11a, 11b.It is of course possible to provide one or more blocks 16 in a box without walls 15 (box as shown in FIG. figure 2 ). In this case the block or blocks 16 will be fixed to the box 8, for example by gluing on the side walls 11a, 11b.

La figure 4 montre deux blocs 16 disposés au niveau d'une partie avant du caisson 8. Les deux logements délimités par des cloisons 15 à l'arrière du caisson 8 sont dépourvus de blocs. Il est ainsi possible de ne prévoir des blocs amortisseurs 16 qu'au niveau d'une zone du caisson 8 que l'on cherche particulièrement à renforcer.The figure 4 shows two blocks 16 disposed at a front portion of the box 8. The two housing delimited by partitions 15 at the rear of the box 8 are free of blocks. It is thus possible to provide damping blocks 16 only at a zone of the box 8 that is particularly sought to strengthen.

Les figures 5a et 5b montrent un autre mode de réalisation de l'invention dans lequel le caisson 8 comporte une pièce médiane 10 qui est allégée. Cette pièce 10 comporte ainsi des cavités 17 régulièrement réparties sur sa longueur.The Figures 5a and 5b show another embodiment of the invention in which the casing 8 comprises a median part 10 which is lightened. This part 10 thus has cavities 17 regularly distributed over its length.

Ces cavités permettent de diminuer la masse de la pièce 10 sans pour autant réduire sa rigidité.These cavities make it possible to reduce the mass of the part 10 without reducing its rigidity.

L'Homme du Métier dimensionnera aisément le nombre, la forme, les dimensions et la répartition des cavités 17 sur la pièce 10 en fonction des caractéristiques de rigidité souhaitées.The skilled person will easily size the number, shape, dimensions and distribution of the cavities 17 on the part 10 according to the desired stiffness characteristics.

Les cavités 17 pourront être réalisées par usinage ou bien obtenues par fonderie lors de la fabrication de la pièce 10.The cavities 17 may be made by machining or obtained by casting during the manufacture of the part 10.

Il est bien entendu possible de combiner les différents modes de réalisation précédemment décrits en fonction des besoins opérationnels.It is of course possible to combine the various embodiments described above according to the operational requirements.

On pourra définir un caisson selon les figures 5a, 5b comportant également des cloisons 15 et/ou des blocs 16.We can define a box according to Figures 5a, 5b also comprising partitions 15 and / or blocks 16.

On pourra dans tous les cas choisir des formes de surfaces d'appui 13 du type de celles représentées à la figure 1b.In any case, it will be possible to choose forms of bearing surfaces 13 of the type shown in FIG. figure 1b .

On pourra enfin prévoir dans le volume 9 du caisson 8 des cloisons longitudinales perpendiculaires aux cloisons transversales 15. On réalisera ainsi un treillis interne à l'intérieur duquel pourront être disposés des blocs de matériau amortissant.Finally, it will be possible to provide, in the volume 9 of the box 8, longitudinal partitions perpendicular to the transverse partitions 15. Thus, an internal lattice will be made inside which blocks of damping material may be arranged.

Claims (7)

  1. A protection device for the floor (7) of a land vehicle (1) against mines (5), device comprising at least one caisson (8) with a convex external surface oriented towards the ground (6), the caisson (8) incorporating a median part (10) arranged between two lateral walls (11a, 11b) and extending over the full length of the caisson (8), the combination of the lateral walls (11a, 11b) and of the median part (10) giving the global convex form of the caisson, form providing the deviation of part of the blast produced by the detonation of the mine, the median part (10) being of a thickness (E) greater than that (e) of the lateral walls (11a, 11b) and being designed so as to transmit the stress, when a mine detonates, towards the lateral walls (11a, 11b) causing them to deform and causing the caisson to gradually flatten towards the floor, characterised in that the median part is formed by a separate median part (10) which is made integral with the lateral walls (11a, 11b) by fastening means, the median part (10) is in contact with the lateral walls (11a, 11b) by bearing surfaces (13).
  2. A floor protection device according to Claim 1, characterised in that the median part (10) incorporates at least one internal cavity (17).
  3. A floor protection device according to Claim 1, wherein the median part (10) and the lateral walls (11a, 11b) constitute a single-piece assembly.
  4. A floor protection device according to one of Claims 1 to 3, wherein the caisson (8) has at least one internal partition (15).
  5. A floor protection device according to one of Claims 1 to 4, wherein the caisson (8) encloses at least one block (16) of shock-absorbing material.
  6. A floor protection device according to one of Claims 1 to 5, wherein the caisson (8) constitutes an element added onto a vehicle (1).
  7. A floor protection device according to one of Claims 1 to 6, wherein the caisson (8) constitutes part of the very structure of a lower part of a vehicle (1).
EP07290177A 2006-02-17 2007-02-13 Floor protection device for a vehicle Not-in-force EP1821061B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07290177T PL1821061T3 (en) 2006-02-17 2007-02-13 Floor protection device for a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0601526A FR2897677B1 (en) 2006-02-17 2006-02-17 DEVICE FOR PROTECTING A VEHICLE FLOOR

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EP1821061A1 EP1821061A1 (en) 2007-08-22
EP1821061B1 true EP1821061B1 (en) 2011-11-23

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US (1) US7685924B2 (en)
EP (1) EP1821061B1 (en)
AT (1) ATE534881T1 (en)
ES (1) ES2376593T3 (en)
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PL (1) PL1821061T3 (en)

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Publication number Publication date
FR2897677B1 (en) 2010-05-28
ES2376593T3 (en) 2012-03-15
US7685924B2 (en) 2010-03-30
FR2897677A1 (en) 2007-08-24
PL1821061T3 (en) 2012-04-30
ATE534881T1 (en) 2011-12-15
US20080034953A1 (en) 2008-02-14
EP1821061A1 (en) 2007-08-22

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