EP1828707A1 - Device for protecting a vehicle floor - Google Patents

Device for protecting a vehicle floor

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Publication number
EP1828707A1
EP1828707A1 EP05824523A EP05824523A EP1828707A1 EP 1828707 A1 EP1828707 A1 EP 1828707A1 EP 05824523 A EP05824523 A EP 05824523A EP 05824523 A EP05824523 A EP 05824523A EP 1828707 A1 EP1828707 A1 EP 1828707A1
Authority
EP
European Patent Office
Prior art keywords
reinforcements
front plate
floor
vehicle
plate
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.)
Granted
Application number
EP05824523A
Other languages
German (de)
French (fr)
Other versions
EP1828707B1 (en
Inventor
Yves Barbe
Sébastien CARRIE
Laurent Wagnez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexter Systems SA
Original Assignee
Nexter Systems SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nexter Systems SA filed Critical Nexter Systems SA
Priority to PL05824523T priority Critical patent/PL1828707T3/en
Publication of EP1828707A1 publication Critical patent/EP1828707A1/en
Application granted granted Critical
Publication of EP1828707B1 publication Critical patent/EP1828707B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 making it possible to protect a floor of a land vehicle against mines.
  • a shielding therein for absorbing the energy produced by the blast of the mine.
  • Known shields comprise one or more metal or composite layers and possibly deflector means.
  • the patent WO03 / 102489 thus describes a convex convex shield ensuring the protection of the mechanical transmission means of the vehicle.
  • the known shields are not suitable for the protection of vehicles with a low ground clearance (of the order of 400 to 500 mm). These vehicles are particularly vulnerable to mines, including anti-tank and anti-personnel blast mines.
  • the subject of the invention is a device for protecting a floor of a land vehicle against mines, characterized in that it comprises at least one layer of deformable reinforcements interposed between a front flat plate and a rear flat plate, the surface mass of the front plate being greater than that of the reinforcements.
  • the ratio of the mass per unit area of the reinforcements to the surface weight of the front plate will advantageously be less than or equal to 0.7.
  • Reinforcements may consist of at least one row of at least two tubes.
  • the device comprises at least two reinforcements in contact with each other and arranged at a substantially middle portion of the front plate.
  • the device may comprise at least one row of reinforcements in contact two by two with each other and distributed over substantially an entire dimension of the floor.
  • the front plate may be rectangular and the reinforcements may have their axes parallel to a length of the front plate.
  • the front plate may be rectangular and the reinforcements may have their axes parallel to a width of the front plate.
  • the rear plate may be constituted by the floor of the vehicle itself.
  • the back plate may advantageously be secured to the front plate and form with it and the reinforcements a protective box adaptable to a vehicle floor.
  • FIG. 1 schematically represents a vehicle passing over a mine, equipped vehicle a floor protection device according to the invention
  • FIG. 2 represents a first embodiment of a protection device according to the invention
  • FIGS. 3, 4 and 5 show other embodiments of the device according to the invention.
  • FIG. 6 is a view from above of the protection device according to FIG. 5;
  • FIG. 7 is a view from above of a variant of a protection device according to the invention.
  • a vehicle 1 comprises a cabin 2 carried by wheels 3 connected to the cab by an axle 4.
  • a mine 5 breath effect placed on the floor ⁇ . This mine generates during its initiation a strong pressure (shown schematically by the arrows p) on the floor 7 of the vehicle 1.
  • a protective device 8 is fixed thereto.
  • the vehicle equipped with the device 8 has a residual ground clearance G which remains greater than 300 mm.
  • FIG. 2 shows a first embodiment of such a device 8.
  • This protection device 8 comprises a flat front plate 9 made of a material with a high mechanical strength as well as at least one layer of deformable reinforcements 10.
  • the deformable reinforcements are tubes made of a material with high mechanical characteristics.
  • the tubes 10 are thus interposed between the front plate 9 and a rear flat plate which is here the floor 7 of the vehicle.
  • a housing 11 (for example made of folded sheet metal) receives the front plate 9 and the reinforcements 10 and has lugs 12 enabling it to be fastened to the floor 7 of the vehicle 1.
  • the surface mass of the front plate 9 is greater than that of the reinforcements 10. It will thus be advantageous to choose a ratio of the reinforcement mass per unit area to the surface mass of the plate which is less than or equal to at 0, 7.
  • mass per unit area refers to the ratio of the mass of the element considered to the floor area covered by this element.
  • the operation of the device according to the invention is as follows. During the initiation of the mine 5, the pressure is exerted on the front plate 9 which is strong enough to consume a portion of the energy of the mine and also to stop splinters and projections. The dimensions of the front plate 9 allow it to give it sufficient rigidity to communicate to the tubular reinforcements 10 a portion of the energy received.
  • These reinforcements are dimensioned to deform in flexion and compression in a relatively localized manner and allow (with a small space requirement) to consume a portion of the energy produced by the blast of the mine 5. Moreover, they have the property of have a moment of inertia of flexion sufficient to participate in the stiffness of the protection at the vertical of the mine.
  • the level of protection is increased with a minimum protection mass.
  • the deformation of the front plate 9 is militated because of the proximity of the reinforcements and the increase in stiffness that results from their mutual contact.
  • two reinforcements in contact have an overall stiffness which is increased with respect to. that of the same two reinforcements arranged at a distance one of
  • the invention thus makes it possible to obtain the best compromise between a reduced protection mass and an optimum level of protection.
  • the reinforcements 10 make it possible to stiffen the floor 7 of the vehicle and thus to limit its deformation consecutive to the explosion of the mine.
  • deformable reinforcements for example profiles having a different section (for example polygonal or elliptical) or angled profiles or beams I.
  • cylindrical shape is the one that ensures the best compromise between the capacity of deformation, the moment of inertia in flexion and the reduced bulk.
  • FIG. 3 shows a protection device according to another embodiment which differs from the previous embodiment only in the presence of a rear plate 13 integral with the reinforcements and having a simple role of holding the tubes.
  • the two plates 9 and 13 and the reinforcements 10 are made integral with a housing 11 which forms a protective box adaptable to a vehicle floor, for example by means of fixing lugs 12.
  • the reinforcements 10 are deformed plastically between the two plates 9 and 13.
  • the box 8 is therefore autonomous and it is possible to fix it at some distance from the floor 7 of a vehicle.
  • a row 15 of three tubular reinforcements 10 is thus arranged at a middle portion M of the front plate 9. Isolated reinforcements 10a and 10b are arranged at a distance on either side of this median row 15.
  • This embodiment makes it possible to reduce the mass of the protection device. It is indeed essential to protect the middle part of the floor since it is at this level that the pressure generated by the initiation of a blast mine is maximum.
  • the peripheral reinforcements 10a and 10b improve the distribution of the forces communicated by the front plate 9.
  • FIGS. 5 and 6 thus show such an embodiment in which the middle row 15 comprises five reinforcements 10.
  • reinforcements 10 of the middle row are made integral with the front plate 9 by means of flanges 16 sheet metal, welded to the front plate 9 (see also Figure 6).
  • the assembly shall be fixed to the floor of the vehicle by any appropriate means, for example fixing lugs 12.
  • the front plate 9 is substantially rectangular with a width 1 and a length L which are substantially those of the floor of the vehicle to be protected.
  • the tubular reinforcements 10 have their axes 17 parallel to the longitudinal axis of the vehicle (here represented by the length L of the front plate 9) (see FIG. 6). It is of course possible to arrange the tubular reinforcements 10 with a different orientation.
  • FIG. 7 thus shows a protection device in which the tubular reinforcements 10 have their axes 17 perpendicular to the longitudinal axis of the vehicle (hence here parallel to the width 1 of the front plate 9).
  • a first row 18 of reinforcements 10 joined to each other two by two is arranged in the vicinity of the rear part AR of the device (arranged here towards the rear of the floor 7 of the vehicle).
  • Other insulated reinforcements are arranged towards the front part AV of the device.
  • the reinforcements 10 are preferably at the level of the most sensitive zones (passenger compartment in particular). Such an arrangement also makes it possible to lighten the device.
  • the tubular reinforcements are more numerous in the vicinity of the rear of the vehicle since it is at this level
  • reinforcements 10 having a length substantially equal to the length L or to the width 1 of the front plate 9 have been represented.
  • the protective device it is of course possible to lighten the protective device by choosing reinforcements having a shorter length.
  • the reinforcements will be concentrated at the level of the zone that is mainly to be protected.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention concerns a device (8) for protecting a floor (7) of a land vehicle (1) against mines (5). Said device is characterized in that it comprises at least one layer of deformable reinforcements (10) interposed between a planar front plate (9) and a planar rear plate (7, 13), the surface density of the front plate (9) being higher than that of the reinforcements (10).

Description

DISPOSITIF DE PROTECTION DE PLANCHER DE VEHICULE VEHICLE FLOOR PROTECTION DEVICE
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 making it possible to protect 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 l ' énergie produite par le souffle de la mine . Les blindages connus comprennent une ou plusieurs couches métalliques ou composites et éventuellement des moyens déflecteurs . Le brevet WO03/102489 décrit ainsi un blindage rapporté convexe assurant la protection des moyens de transmission mécanique du véhicule .In order to protect the floor of a land vehicle, it is known to arrange a shielding therein for absorbing the energy produced by the blast of the mine. Known shields comprise one or more metal or composite layers and possibly deflector means. The patent WO03 / 102489 thus describes a convex convex shield ensuring the protection of the mechanical transmission means of the vehicle.
Les blindages connus ne sont pas adaptés pour la protection de véhicules ayant une garde au sol faible (de l ' ordre de 400 à 500 mm) . Ces véhicules sont particulièrement vulnérables aux mines et notamment aux mines antichar et anti-personnel à effet de souffle .The known shields are not suitable for the protection of vehicles with a low ground clearance (of the order of 400 to 500 mm). These vehicles are particularly vulnerable to mines, including anti-tank and anti-personnel blast mines.
C ' est le but de l ' invention que de proposer un dispositif de protection permettant d ' assurer, avec une épaisseur totale relativement réduite, une protection efficace des planchers 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 which makes it possible to provide, with a relatively small total thickness, an effective protection of the floors of the vehicles against the effects of the mines and in particular the blast mines.
Ainsi l ' invention a pour objet un dispositif de protection d ' un plancher de véhicule terrestre contre les mines , dispositif caractérisé en ce qu ' il comporte au moins une couche de renforts déformables interposés entre une plaque plane avant et une plaque plane arrière, la masse surfacique de la plaque avant étant supérieure à celle des renforts .Thus, the subject of the invention is a device for protecting a floor of a land vehicle against mines, characterized in that it comprises at least one layer of deformable reinforcements interposed between a front flat plate and a rear flat plate, the surface mass of the front plate being greater than that of the reinforcements.
Le rapport de la masse surfacique des renforts sur la masse surfacique de la plaque avant sera avantageusement inférieur ou égal à 0 , 7.The ratio of the mass per unit area of the reinforcements to the surface weight of the front plate will advantageously be less than or equal to 0.7.
Les renforts pourront être constitués par au moins une rangée d ' au moins deux tubes .Reinforcements may consist of at least one row of at least two tubes.
Selon un mode de réalisation, le dispositif comporte au moins deux renforts en contact l ' un avec l ' autre et disposés au niveau d ' une partie sensiblement médiane de la plaque avant .According to one embodiment, the device comprises at least two reinforcements in contact with each other and arranged at a substantially middle portion of the front plate.
Le dispositif pourra comporter au moins une rangée de renforts en contact deux par deux les uns avec les autres et répartis sur sensiblement toute une dimension du plancher .The device may comprise at least one row of reinforcements in contact two by two with each other and distributed over substantially an entire dimension of the floor.
La plaque avant pourra être rectangulaire et les renforts pourront avoir leurs axes parallèles à une longueur de la plaque avant .The front plate may be rectangular and the reinforcements may have their axes parallel to a length of the front plate.
Inversement, la plaque avant pourra être rectangulaire et les renforts pourront avoir leurs axes parallèles à une largeur de la plaque avant .Conversely, the front plate may be rectangular and the reinforcements may have their axes parallel to a width of the front plate.
La plaque arrière pourra être constituée par le plancher du véhicule lui-même .The rear plate may be constituted by the floor of the vehicle itself.
La plaque arrière pourra avantageusement être solidaire de la plaque avant et former avec celle ci et les renforts un caisson de protection adaptable à un plancher de véhicule .The back plate may advantageously be secured to the front plate and form with it and the reinforcements a protective box adaptable to a vehicle floor.
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 1 représente schématiquement un véhicule passant au-dessus d ' une mine, véhicule équipé d ' un dispositif de protection de plancher selon l ' invention,The invention will be better understood on reading the following description of various embodiments, a description given with reference to the accompanying drawings and in which: FIG. 1 schematically represents a vehicle passing over a mine, equipped vehicle a floor protection device according to the invention,
- la figure 2 représente un premier mode de réalisation d ' un dispositif de protection selon l ' invention,FIG. 2 represents a first embodiment of a protection device according to the invention,
- les figures 3, 4 et 5 montrent d' autres modes de réalisation du dispositif selon l ' invention,FIGS. 3, 4 and 5 show other embodiments of the device according to the invention,
- la figure 6 est une vue de dessus du dispositif de protection selon la figure 5 , - la figure 7 est une vue de dessus d ' une variante d ' un dispositif de protection selon invention .FIG. 6 is a view from above of the protection device according to FIG. 5; FIG. 7 is a view from above of a variant of a protection device according to the invention.
En se reportant à la figure 1 , un véhicule 1 comporte une cabine 2 portée par des roues 3 reliées à la cabine par un essieu 4. On a représenté sur la figure 1 une mine 5 à effet de souffle posée sur le sol β . Cette mine engendre lors de son initiation une forte pression ( schématisée par les flèches p) sur le plancher 7 du véhicule 1. Conformément à l ' invention, pour permettre au plancher 7 de résister aux effets du souffle, on fixe sur celui ci un dispositif de protection 8.Referring to Figure 1, a vehicle 1 comprises a cabin 2 carried by wheels 3 connected to the cab by an axle 4. There is shown in Figure 1 a mine 5 breath effect placed on the floor β. This mine generates during its initiation a strong pressure (shown schematically by the arrows p) on the floor 7 of the vehicle 1. According to the invention, to enable the floor 7 to withstand the effects of the blast, a protective device 8 is fixed thereto.
Bien que le véhicule ait une garde au sol faible, le véhicule équipé du dispositif 8 présente une garde au sol résiduelle G qui reste supérieure à 300 mm.Although the vehicle has a low ground clearance, the vehicle equipped with the device 8 has a residual ground clearance G which remains greater than 300 mm.
La figure 2 montre un premier mode de réalisation d ' un tel dispositif 8. Ce dispositif de protection 8 comporte une plaque plane avant 9 réalisée en un matériau à haute résistance mécanique ainsi qu ' au moins une couche de renforts déformables 10.FIG. 2 shows a first embodiment of such a device 8. This protection device 8 comprises a flat front plate 9 made of a material with a high mechanical strength as well as at least one layer of deformable reinforcements 10.
Ici les renforts déformables sont des tubes réalisés en un matériau à hautes caractéristiques mécaniques .Here the deformable reinforcements are tubes made of a material with high mechanical characteristics.
Les tubes 10 sont ainsi interposés entre la plaque avant 9 et une plaque plane arrière qui est ici le plancher 7 du véhicule .The tubes 10 are thus interposed between the front plate 9 and a rear flat plate which is here the floor 7 of the vehicle.
Afin de faciliter le montage du dispositif, un boîtier 11 (par exemple en tôle pliée) reçoit la plaque avant 9 et les renforts 10 et il comporte des pattes 12 permettant sa fixation au plancher 7 du véhicule 1.In order to facilitate the mounting of the device, a housing 11 (for example made of folded sheet metal) receives the front plate 9 and the reinforcements 10 and has lugs 12 enabling it to be fastened to the floor 7 of the vehicle 1.
Selon une autre caractéristique de l ' invention, la masse surfacique de la plaque avant 9 est supérieure à celle des renforts 10. On choisira ainsi avantageusement un rapport de la masse surfacique des renforts sur la masse surfacique de la plaque qui est inférieur -ou égal à 0 , 7.According to another characteristic of the invention, the surface mass of the front plate 9 is greater than that of the reinforcements 10. It will thus be advantageous to choose a ratio of the reinforcement mass per unit area to the surface mass of the plate which is less than or equal to at 0, 7.
On entend par masse surfacique le rapport de la masse de l ' élément considéré à la surface de plancher 7 couverte par cet élément .The term "mass per unit area" refers to the ratio of the mass of the element considered to the floor area covered by this element.
On considère ici que l ' on couvre un plancher rectangulaire de largeur 1 et de longueur L . Pour le mode de réalisation selon la figure 2 où les tubes 10 couvrent sensiblement toute la largeur 1 du plancher, il suffit donc de dire que la masse de la plaque avant 9 est supérieure à la masse des renforts 10. Tous les tubes ont ici le même diamètre et sont en contact deux par deux le long de génératrices . Le même niveau de protection est donc assuré pour toute la surface du plancher 7. Les tubes sont fixés à la plaque avant 9 par un moyen de maintien statique (par exemple : collage, bridage, soudage par points...) .It is considered here that one covers a rectangular floor of width 1 and length L. For the embodiment according to Figure 2 where the tubes 10 cover substantially the entire width 1 of the floor, it is sufficient to say that the mass of the front plate 9 is greater than the mass of the reinforcements 10. All tubes here have the same diameter and are in contact two by two along generators. The same level of protection is thus ensured for the entire surface of the floor 7. The tubes are fixed to the front plate 9 by a static holding means (for example: gluing, clamping, spot welding ...).
Le fonctionnement du dispositif selon l ' invention est le suivant . Lors de l ' initiation de la mine 5 , la pression s ' exerce sur la plaque avant 9 qui est suffisamment résistante pour consommer une partie de l ' énergie de la mine et également pour arrêter les éclats et proj ections . Les dimensions de la plaque avant 9 permettent de lui conférer une rigidité suffisante lui permettant de communiquer aux renforts tubulaires 10 une partie de l ' énergie reçue .The operation of the device according to the invention is as follows. During the initiation of the mine 5, the pressure is exerted on the front plate 9 which is strong enough to consume a portion of the energy of the mine and also to stop splinters and projections. The dimensions of the front plate 9 allow it to give it sufficient rigidity to communicate to the tubular reinforcements 10 a portion of the energy received.
Ces renforts sont dimensionnés pour se déformer en flexion et en compression d ' une façon relativement localisée et permettent (avec un encombrement réduit) de consommer une partie de l ' énergie produite par le souffle de la mine 5. De plus ils possèdent la propriété d' avoir un moment d ' inertie de flexion suffisant pour participer à la raideur de la protection à la verticale de la mine .These reinforcements are dimensioned to deform in flexion and compression in a relatively localized manner and allow (with a small space requirement) to consume a portion of the energy produced by the blast of the mine 5. Moreover, they have the property of have a moment of inertia of flexion sufficient to participate in the stiffness of the protection at the vertical of the mine.
Par ailleurs , en disposant au moins deux renforts profilés en contact l' un avec l' autre on accroît le niveau de protection avec une masse de protection minimale . En effet, la déformation de la plaque avant 9 est militée du fait de la proximité des renforts et par l' accroissement de raideur qui résulte de leur contact mutuel . Deux renforts en contact ont en^ effet une raideur globale qui est accrue par rapport à. celle des deux mêmes renforts disposés à distance l' un deMoreover, by arranging at least two profiled reinforcements in contact with one another, the level of protection is increased with a minimum protection mass. Indeed, the deformation of the front plate 9 is militated because of the proximity of the reinforcements and the increase in stiffness that results from their mutual contact. In fact, two reinforcements in contact have an overall stiffness which is increased with respect to. that of the same two reinforcements arranged at a distance one of
1' autre .The other.
En proposant de disposer ces renforts au niveau de la zone de plancher que l' on cherche principalement à protéger, l' invention permet ainsi d' obtenir le meilleur compromis , entre une masse de protection réduite et un niveau de protection optimal .By proposing to have these reinforcements at the level of the floor area that is primarily sought to be protected, the invention thus makes it possible to obtain the best compromise between a reduced protection mass and an optimum level of protection.
Il est ainsi possible d' assurer une protection efficace du plancher 7 du véhicule avec une épaisseur de protection relativement faible (E inférieure à 200 mm) , ce qui autorise la protection du plancher de véhicules à garde au sol réduite . De plus les renforts 10 permettent de rigidifier le plancher 7 du véhicule et ainsi de limiter sa déformation consécutive à l ' explosion de la mine .It is thus possible to ensure effective protection of the floor 7 of the vehicle with a relatively low protection thickness (E less than 200 mm), which allows the protection of the floor of vehicles with reduced ground clearance. In addition, the reinforcements 10 make it possible to stiffen the floor 7 of the vehicle and thus to limit its deformation consecutive to the explosion of the mine.
A titre de variante, on pourrait utiliser d ' autres types de renforts déformables , par exemple des profilés ayant une section différente (par exemple polygonale ou elliptique) ou bien des profilés en équerre ou des poutrelles en I .Alternatively, one could use other types of deformable reinforcements, for example profiles having a different section (for example polygonal or elliptical) or angled profiles or beams I.
Cependant la forme cylindrique est celle qui assure le meilleur compromis entre la capacité de déformation, le moment d ' inertie en flexion et l ' encombrement réduit .However, the cylindrical shape is the one that ensures the best compromise between the capacity of deformation, the moment of inertia in flexion and the reduced bulk.
L ' Homme du Métier dimensionnera aisément les tubes (nature des matériaux, longueur et épaisseur) et la plaque avant en fonction des caractéristiques de protection souhaitées pour un véhicule donné . La figure 3 montre un dispositif de protection selon un autre mode de réalisation qui ne diffère du précédent que par la présence d ' une plaque arrière 13 solidaire des renforts et ayant un simple rôle de maintien des tubes .The skilled person will easily size the tubes (type of materials, length and thickness) and the front plate according to the desired protection characteristics for a given vehicle. FIG. 3 shows a protection device according to another embodiment which differs from the previous embodiment only in the presence of a rear plate 13 integral with the reinforcements and having a simple role of holding the tubes.
Les deux plaques 9 et 13 ainsi que les renforts 10 sont rendus solidaires d ' un boîtier 11 qui forme un caisson de protection adaptable à un plancher de véhicule, par exemple à l ' aide de pattes de fixation 12.The two plates 9 and 13 and the reinforcements 10 are made integral with a housing 11 which forms a protective box adaptable to a vehicle floor, for example by means of fixing lugs 12.
Avec ce mode de réalisation, les renforts 10 sont déformés plastiquement entre les deux plaques 9 et 13. Le caisson 8 est donc autonome et il est possible de le fixer à quelque distance du plancher 7 d ' un véhicule .With this embodiment, the reinforcements 10 are deformed plastically between the two plates 9 and 13. The box 8 is therefore autonomous and it is possible to fix it at some distance from the floor 7 of a vehicle.
Il est donc ainsi possible de protéger un véhicule dans lequel des organes de transmission 14 sont disposés en dessous du plancher 7. Suivant le mode de réalisation de la figure 4 les renforts 10 ne couvrent pas toute la surface du plancher .It is thus possible to protect a vehicle in which transmission members 14 are disposed below the floor 7. According to the embodiment of Figure 4 the reinforcements 10 do not cover the entire floor surface.
Une rangée 15 de trois renforts tubulaires 10 est ainsi disposée au niveau d ' une partie médiane M de la plaque avant 9. Des renforts isolés 10a et 10b sont disposés à distance de part et d ' autre de cette rangée médiane 15.A row 15 of three tubular reinforcements 10 is thus arranged at a middle portion M of the front plate 9. Isolated reinforcements 10a and 10b are arranged at a distance on either side of this median row 15.
Ce mode de réalisation permet de diminuer la masse du dispositif de protection . Il est en effet essentiel de protéger la partie médiane du plancher puisque c ' est à ce niveau que la pression engendrée par l ' initiation d ' une mine à effet de souffle est maximale .This embodiment makes it possible to reduce the mass of the protection device. It is indeed essential to protect the middle part of the floor since it is at this level that the pressure generated by the initiation of a blast mine is maximum.
Les renforts périphériques 10a et 10b améliorent la répartition des efforts communiqués par la plaque avant 9.The peripheral reinforcements 10a and 10b improve the distribution of the forces communicated by the front plate 9.
Il est bien entendu possible de ne disposer des renforts 10 qu ' au niveau de la partie médiane M. Les figures 5 et β montrent ainsi un tel mode de réalisation dans lequel la rangée médiane 15 comporte cinq renforts 10. Suivant ce mode de réalisation les renforts 10 de la rangée médiane sont rendus solidaires de la plaque avant 9 à l ' aide de brides 16 en tôle, soudées à la plaque avant 9 (voir aussi la figure 6) .It is of course possible to have reinforcements 10 only at the middle portion M. FIGS. 5 and 6 thus show such an embodiment in which the middle row 15 comprises five reinforcements 10. reinforcements 10 of the middle row are made integral with the front plate 9 by means of flanges 16 sheet metal, welded to the front plate 9 (see also Figure 6).
L ' ensemble sera fixé au plancher du véhicule par tout moyen approprié par exemple des pattes de fixation 12.The assembly shall be fixed to the floor of the vehicle by any appropriate means, for example fixing lugs 12.
Il est bien entendu possible de combiner les modes de réalisation précédents , par exemple de réaliser un dispositif analogue à celui représenté figure 4 mais dépourvu de plaque arrière 13. Dans ce cas les renforts tubulaires seront fixés à la plaque avant 9 par exemple par des colliers en tôle . L ' ensemble sera ensuite appliqué contre un plancher 7 du véhicule .It is of course possible to combine the previous embodiments, for example to produce a device similar to that shown in Figure 4 but without a back plate 13. In this case the tubular reinforcements will be fixed to the front plate 9 for example by collars in jail . The assembly will then be applied against a floor 7 of the vehicle.
Dans tous les modes de réalisation décrits jusqu ' à présent la plaque avant 9 est sensiblement rectangulaire avec une - largeur 1 et une longueur L qui sont sensiblement celles du plancher du véhicule à protéger . Par ailleurs les renforts tubulaires 10 ont leurs axes 17 parallèles à l ' axe longitudinal du véhicule ( figuré ici par la longueur L de la plaque avant 9) (voir la figure 6) . II est bien entendu possible de disposer les renforts tubulaires 10 avec une orientation différente .In all the embodiments described up to now the front plate 9 is substantially rectangular with a width 1 and a length L which are substantially those of the floor of the vehicle to be protected. In addition, the tubular reinforcements 10 have their axes 17 parallel to the longitudinal axis of the vehicle (here represented by the length L of the front plate 9) (see FIG. 6). It is of course possible to arrange the tubular reinforcements 10 with a different orientation.
La figure 7 montre ainsi un dispositif de protection dans lequel les renforts tubulaires 10 ont leurs axes 17 perpendiculaires à l ' axe longitudinal du véhicule (donc ici parallèles à la largeur 1 de la plaque avant 9) .FIG. 7 thus shows a protection device in which the tubular reinforcements 10 have their axes 17 perpendicular to the longitudinal axis of the vehicle (hence here parallel to the width 1 of the front plate 9).
Une première rangée 18 de renforts 10 accolés les uns aux autres deux par deux est disposée au voisinage de la partie arrière AR du dispositif (disposée ici vers l ' arrière du plancher 7 du véhicule) . D ' autres renforts 10 isolés sont disposés vers la partie avant AV du dispositif . On dispose de préférence les renforts 10 au niveau des zones les plus sensibles (habitacle notamment) . Une telle disposition permet également d ' alléger le dispositif . Les renforts tubulaires sont plus nombreux au voisinage de l ' arrière du véhicule puisque c ' est à ce niveauA first row 18 of reinforcements 10 joined to each other two by two is arranged in the vicinity of the rear part AR of the device (arranged here towards the rear of the floor 7 of the vehicle). Other insulated reinforcements are arranged towards the front part AV of the device. The reinforcements 10 are preferably at the level of the most sensitive zones (passenger compartment in particular). Such an arrangement also makes it possible to lighten the device. The tubular reinforcements are more numerous in the vicinity of the rear of the vehicle since it is at this level
(habitacle) que la protection maximale doit être assurée donc que la capacité d' absorption d' énergie doit être la plus forte . On pourra diminuer le nombre de tubes en regard des zones moins sensibles (groupe motopropulseur par exemple) .(cockpit) that the maximum protection must be ensured so that the energy absorption capacity must be the strongest. We can reduce the number of tubes compared to less sensitive areas (powertrain for example).
Là encore les renforts sont rendus solidaires de la plaque de base à l ' aide de brides 19.Again the reinforcements are secured to the base plate with flanges 19.
On a représenté sur les figures précédentes des renforts 10 ayant une longueur sensiblement égale à la longueur L ou à la largeur 1 de la plaque avant 9.In the preceding figures, reinforcements 10 having a length substantially equal to the length L or to the width 1 of the front plate 9 have been represented.
Il est bien entendu possible d ' alléger le dispositif de protection en choisissant des renforts ayant une longueur plus réduite . Lors de la définition du dispositif de protection, on concentrera les renforts au niveau de la zone que l ' on cherche principalement à protéger . It is of course possible to lighten the protective device by choosing reinforcements having a shorter length. When defining the protection device, the reinforcements will be concentrated at the level of the zone that is mainly to be protected.

Claims

REVENDICATIONS
1. Dispositif de protection ( 8 ) d ' un plancher (7 ) de véhicule terrestre contre les mines , dispositif caractérisé en ce qu' il comporte au moins une couche de renforts déformables ( 10) interposés entre une plaque plane avant ( 9 ) et une plaque plane arrière (7 , 13) , la masse surfacique de la plaque avant ( 9 ) étant supérieure à celle des renforts ( 10 ) .Protective device (8) for a ground vehicle floor (7) against mines, characterized in that it comprises at least one layer of deformable reinforcements (10) interposed between a front plane plate (9) and a rear flat plate (7, 13), the surface mass of the front plate (9) being greater than that of the reinforcements (10).
2. Dispositif de protection selon la revendication 1 , caractérisé en ce que le rapport de la masse surfacique des renforts ( 10 ) sur la masse surfacique de la plaque avant ( 9 ) est inférieur ou égal à 0 , 7.2. Protective device according to claim 1, characterized in that the ratio of the mass per unit area of the reinforcements (10) to the surface mass of the front plate (9) is less than or equal to 0.7.
3. Dispositif de protection selon une des revendications 1 ou 2 , caractérisé en ce que les renforts ( 10 ) sont constitués par au moins une rangée d ' au moins deux tubes . 3. Protective device according to one of claims 1 or 2, characterized in that the reinforcements (10) consist of at least one row of at least two tubes.
4. Dispositif de protection selon une des revendications 1 à 3 , caractérisé en ce qu ' il comporte au moins deux renforts ( 10 ) en contact l ' un avec l ' autre et disposés au niveau d ' une partie sensiblement médiane (M) de la plaque avant ( 9 ) . Protective device according to one of claims 1 to 3, characterized in that it comprises at least two reinforcements (10) in contact with each other and arranged at a substantially middle portion (M) of the front plate (9).
5. Dispositif de protection selon la revendication 4 ,- caractérisé en ce qu ' il comporte au moins une rangée ( 15, 18 ) de renforts ( 10 ) en contact deux par deux les uns avec les autres et répartis sur sensiblement toute une dimension du plancher . 5. Protective device according to claim 4, characterized in that it comprises at least one row (15, 18) of reinforcements (10) in contact two by two with each other and distributed over substantially a whole dimension of floor.
6. Dispositif de protection selon la . revendication 5 , caractérisé en ce que la plaque avant ( 9 ) est rectangulaire et en ce que les renforts ( 10 ) ont leurs axes ( 17 ) parallèles à une longueur (L) de la plaque avant ( 9 ) .6. Protection device according to the. claim 5, characterized in that the front plate (9) is rectangular and in that the reinforcements (10) have their axes (17) parallel to a length (L) of the front plate (9).
7. Dispositif de protection selon la revendication 5, caractérisé en ce que la plaque avant ( 9 ) est rectangulaire et en ce que les renforts ( 10 ) ont leurs axes ( 17 ) parallèles à une largeur (1 ) de la plaque avant ( 9 ) .Protective device according to claim 5, characterized in that the front plate (9) is rectangular and in that the reinforcements (10) have their axes (17) parallel to a width (1) of the front plate (9). ).
8. Dispositif de protection selon une des revendications 1 à 7 , caractérisé en ce que la plaque arrière est constituée par le plancher ( 7 ) du véhicule lui-même .8. Protection device according to one of claims 1 to 7, characterized in that the rear plate is constituted by the floor (7) of the vehicle itself.
9. Dispositif de protection selon une des revendications 1 à 7 , caractérisé en ce que la plaque arrière ( 13) est solidaire de la plaque avant ( 9 ) et forme avec celle ci et les renforts ( 10 ) un caisson de protection adaptable à un plancher ( 7 ) de véhicule . 9. Protective device according to one of claims 1 to 7, characterized in that the rear plate (13) is integral with the front plate (9) and forms with it and the reinforcements (10) a protective box adaptable to a floor (7) of the vehicle.
EP05824523A 2004-12-21 2005-12-05 Device for protecting a vehicle floor Active EP1828707B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05824523T PL1828707T3 (en) 2004-12-21 2005-12-05 Device for protecting a vehicle floor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0413619A FR2879731B1 (en) 2004-12-21 2004-12-21 VEHICLE FLOOR PROTECTION DEVICE
PCT/FR2005/003025 WO2006067291A1 (en) 2004-12-21 2005-12-05 Device for protecting a vehicle floor

Publications (2)

Publication Number Publication Date
EP1828707A1 true EP1828707A1 (en) 2007-09-05
EP1828707B1 EP1828707B1 (en) 2013-04-03

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EP05824523A Active EP1828707B1 (en) 2004-12-21 2005-12-05 Device for protecting a vehicle floor

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US (1) US7914069B2 (en)
EP (1) EP1828707B1 (en)
DK (1) DK1828707T3 (en)
ES (1) ES2415247T3 (en)
FR (1) FR2879731B1 (en)
IL (1) IL179168A (en)
PL (1) PL1828707T3 (en)
WO (1) WO2006067291A1 (en)
ZA (1) ZA200609449B (en)

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Also Published As

Publication number Publication date
PL1828707T3 (en) 2013-08-30
IL179168A0 (en) 2007-03-08
US7914069B2 (en) 2011-03-29
EP1828707B1 (en) 2013-04-03
FR2879731A1 (en) 2006-06-23
FR2879731B1 (en) 2010-06-04
ZA200609449B (en) 2009-10-28
US20080111396A1 (en) 2008-05-15
ES2415247T3 (en) 2013-07-24
IL179168A (en) 2012-04-30
DK1828707T3 (en) 2013-06-17
WO2006067291A1 (en) 2006-06-29

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