FR2901750A1 - Device for progressively absorbing an acceleration induced at an occupant seat of a vehicle with large wheels or a endless track, comprises panels that are preformed and assembled to deform itself progressively under the effect of crushing - Google Patents

Device for progressively absorbing an acceleration induced at an occupant seat of a vehicle with large wheels or a endless track, comprises panels that are preformed and assembled to deform itself progressively under the effect of crushing Download PDF

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Publication number
FR2901750A1
FR2901750A1 FR0605039A FR0605039A FR2901750A1 FR 2901750 A1 FR2901750 A1 FR 2901750A1 FR 0605039 A FR0605039 A FR 0605039A FR 0605039 A FR0605039 A FR 0605039A FR 2901750 A1 FR2901750 A1 FR 2901750A1
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FR
France
Prior art keywords
vehicle
seat
progressively
crushing
effect
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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.)
Pending
Application number
FR0605039A
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French (fr)
Inventor
Jean Michel Ritter
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR0605039A priority Critical patent/FR2901750A1/en
Publication of FR2901750A1 publication Critical patent/FR2901750A1/en
Pending legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
    • B60N2/4242—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42709—Seats or parts thereof displaced during a crash involving residual deformation or fracture of the structure
    • 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
    • F41H7/046—Shock resilient mounted seats for armoured or fighting vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D5/00—Safety arrangements
    • F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
    • F42D5/045—Detonation-wave absorbing or damping means

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The device for progressively absorbing an acceleration induced at an occupant seat of a vehicle with large wheels or a endless track, comprises panels that are preformed and assembled to deform itself progressively under the effect of crushing. The device holds in a volume between floor of the vehicle and base of the seat without exceeding the vertical balance, and is mounted retroactively in the vehicle. The device allows an adjustment of an absorption progressivity and a direction followed by the deformation at the absorption moment.

Description

1 La présente invention concerne un dispositif pour absorber tout ouThe present invention relates to a device for absorbing all or

partie de l'accélération induite a un siège de véhicule a roues ou a chenilles, conséquente a la déflagration d'une charge explosive a la verticale de laquelle se trouverait ce même véhicule.  part of the acceleration induced by a wheeled or crawler vehicle seat, consequent on the explosion of an explosive charge on the vertical of which the same vehicle would be.

Les accélérations induites par ce type d'explosion se montent à plusieurs centaines de "G" et ne durent que quelques centièmes de secondes. Elles ont pour effet principal de causer des dommages corporels souvent mortels pour les occupants, même si aucun éclat ou fragment n'a put pénétrer dans le véhicule grâce à une protection balistique mise en place à cet effet.  The accelerations induced by this type of explosion amount to several hundred "G" and last only a few hundredths of a second. They have the main effect of causing bodily injuries often fatal to the occupants, even if no flare or fragment could penetrate the vehicle thanks to a ballistic protection set up for this purpose.

Des techniques d'absorption de cette accélération sont déjà connues sous la forme de base de siège spécifique. Ces techniques reposent actuellement sur des principes qui soit : 1- Sont placés directement sous le siège, entre le plancher du véhicule et la base du siège. Ces dispositifs ne permettent pas a ce jour une décélération progressive. Couramment, ces dispositifs font appel a des supports élastiques sous forme de plots en caoutchouc ou de lamelles de métal qui vont résister jusqu'a une certaine valeur d'accélération pour se casser ou se plier d'un coup des que cette valeur est dépassée. Si cette technique permet de revenir instantanément a une accélération de valeur "0", son efficacité est temporaire car elle ne dure que le temps qu'il faille au plancher du véhicule qui monte verticalement, sous l'effet de la poussée de l'onde de choc, de se retrouver a nouveau en contact avec la base du siège et cette fois sans nouveau dispositif pour absorber l'accélération encore restante et qui lui sera a nouveau transmise et induite lors de ce deuxième contact. 2- Sont composés de dispositifs pneumatiques, hydrauliques ou autres, souvent prenant la forme d'un amortisseur ou d'un vérin, placé derrière le dossier du siège sur une base et un support prévu a cet effet. Ces dispositifs offrent une progressivité mais sont encombrants et ne peuvent pas être montés dans un véhicule si la place pour le loger n'a pas été prévue dans le volume et l'architecture du véhicule. 3- Consistent à ne pas fixer le siège au plancher mais a le suspendre au toit ou a l'arceau, ce qui relativise l'effet d'accélération induite sans la supprimer ou l'amortir progressivement au-delà du coefficient d'élasticité des sangles. De plus, ces dispositifs dits "suspendus" ne sont pas compatibles avec les directives européennes sur les équipements de sécurités des véhicules terrestres a moteur car cette directive impose aux siège du véhicule une certaine rigidité, d'être immobilisés durant la conduite et d'opposer une résistance et une moindre déformation lors d'un impact frontal du véhicule et ceci sous l'effet de la force exercée par l'inertie du corps de l'occupant au moment du choc frontale.  Absorption techniques of this acceleration are already known in the form of specific seat base. These techniques are currently based on principles that are: 1- Are placed directly under the seat, between the floor of the vehicle and the base of the seat. These devices do not allow a progressive deceleration to date. Commonly, these devices use elastic supports in the form of rubber pads or metal strips that will resist up to a certain value of acceleration to break or bend at once as this value is exceeded. If this technique makes it possible to return instantly to an acceleration of value "0", its effectiveness is temporary because it lasts only the time it takes to the floor of the vehicle which goes up vertically, under the effect of the thrust of the wave shock, to be again in contact with the base of the seat and this time without new device to absorb the remaining acceleration and which will be transmitted again and induced during this second contact. 2- Are composed of pneumatic devices, hydraulic or other, often taking the form of a damper or cylinder, placed behind the back of the seat on a base and a support provided for this purpose. These devices offer progressiveness but are cumbersome and can not be mounted in a vehicle if the place to house it has not been provided in the volume and architecture of the vehicle. 3- Consist not to attach the seat to the floor but to hang it on the roof or the hoop, which relativizes the induced acceleration effect without removing or gradually damping beyond the elasticity coefficient of straps. Moreover, these so-called "suspended" devices are not compatible with the European directives on safety equipment for land motor vehicles because this directive imposes on the seat of the vehicle a certain rigidity, to be immobilized during the driving and to oppose resistance and less deformation during a frontal impact of the vehicle and this under the effect of the force exerted by the inertia of the body of the occupant at the time of the frontal impact.

Il est notable que bien souvent les techniques actuellement disponibles ne permettent pas non plus: De permettre l'évacuation de l'air sous le siège. Ce volume d'air est souvent prisonnier du dispositif et ne peut s'échapper en quelques centièmes de seconde. Ceci a pour effet de durcir ou de fausser la déformations de certains supports énumérés ci dessus. D'assurer au mieux un déplacement vertical uniforme en tout point de la base du siége au moment de l'écrasement.  It is notable that often the techniques currently available also do not allow: To allow the evacuation of air under the seat. This volume of air is often trapped in the device and can not escape in a few hundredths of a second. This has the effect of hardening or distorting the deformations of some media listed above. To ensure at best a uniform vertical displacement at every point of the base of the seat at the moment of the crash.

Le dispositif selon l'invention permet de remédier à ces inconvénients et manquements. Sa taille et son volume lui permettent d'être logé dans l'espace entre le plancher du véhicule et la base du siège sans dépasser la verticale de l'aplomb du contour du siège. Il 50 est suffisamment rigide pour satisfaire la directive européenne sur les éléments de 45  The device according to the invention overcomes these drawbacks and failures. Its size and volume allow it to be housed in the space between the floor of the vehicle and the base of the seat without exceeding the vertical of the plumb of the seat contour. It is rigid enough to satisfy the European Directive on the elements of 45

2 sécurités des véhicules terrestres a moteur et il offre une déformation continue et progressive Durant toute la phase d'accélération induite suite a une onde de choc. Le dispositif peut aussi se monter rétroactivement dans des véhicules dont l'architecture n'aurait pas été prévue en conséquence a l'origine.  2 safeties of motorized land vehicles and it offers a continuous and progressive deformation during all the acceleration phase induced following a shock wave. The device can also be mounted retroactively in vehicles whose architecture would not have been planned accordingly at the origin.

Le dispositif est constitué de plusieurs panneaux en forme de "zigzags" (même forme que la tôle ondulé mais proportionnellement adapté a la fonction). Les axes des plis sont horizontaux. Les panneaux sont assemblés et soudés entre-eux en forme de cube sans couvercle ni fond pour constituer la base rigide qui fera l'interface entre le plancher du véhicule et le siège. Le fond de ce cube étant remplacé par le plancher, le couvercle étant remplacé par le siège. Les panneaux assemblés sont fixés par boulonnage au plancher du véhicule et le siège est fixé par boulonnage sur les panneaux. Au moment de l'accélération du plancher du véhicule, celui ci ne transmettra son accélération au siège qu'après avoir progressivement écrasé la succession de plis préformés dans les panneaux..  The device consists of several panels in the form of "zigzags" (same shape as the corrugated sheet but proportionally adapted to the function). The axes of the folds are horizontal. The panels are assembled and welded together cube-shaped without cover or bottom to form the rigid base that will interface between the floor of the vehicle and the seat. The bottom of this cube being replaced by the floor, the cover being replaced by the seat. The assembled panels are bolted to the vehicle floor and the seat is bolted to the panels. When accelerating the floor of the vehicle, it will transmit its acceleration to the seat after having gradually crushed the succession of preformed folds in the panels.

A partir de ce principe de base et en fonction des valeurs d'absorption recherchées, il est facile d'ajuster la déformation avec les interventions suivantes: 1- Perforation de trous sur les plis pour en modifier la résistance a la déformation. Ces trous vont être en nombre progressif par étage de plis et vont permettre de régler la progressivité de l'absorption. Aussi, pour assurer une déformation verticale en tous points de la base, la masse de l'occupant n'étant pas uniformément appliquée sur la base, il conviendra de prévoir plus de trous vers la face avant, zone supportant le moins de masse, que dans la face arrière, zone supportant le plus de masse. 2- Afin de permettre à tout l'air de s'échapper rapidement du volume sous le siège et de régler cette évacuation pour pouvoir éventuellement se servir de la compression de cet air en fin de course pour assister l'absorption, on pourra supprimer tout ou partie du panneau avant ou laisser un espace conséquent entre la base du siège et le siège. Dans ce dernier cas, le siège est monté sur sa base par l'entremise d'entretoise de longueur adaptée a la hauteur d'assise recherchée. 3- La progressivité de la déformation peut aussi être obtenue en faisant varier l'épaisseur des panneaux. Une progressivité de l'épaisseur du panneau, de sa base a son extrémité, en projection horizontale, permet d'influencer la progressivité mais cette forme sera plus onéreuse a réaliser. 4- La progressivité de la déformation peut être obtenue en faisant varier les longueurs des 35 sections droites entre deux plis. 5- La progressivité de la déformation peut être obtenue en faisant varier l'angle d'ouverture de l'arc de cercle formant le pli.  From this basic principle and depending on the absorption values sought, it is easy to adjust the deformation with the following interventions: 1- Punch holes on the folds to modify the resistance to deformation. These holes will be in progressive number per layer of folds and will allow to adjust the progressiveness of the absorption. Also, to ensure a vertical deformation at all points of the base, the mass of the occupant not being uniformly applied to the base, it will be necessary to provide more holes to the front side, area supporting the least mass, that in the rear face, area supporting the most mass. 2- In order to allow all the air to escape quickly from the volume under the seat and to regulate this evacuation to be able to possibly use the compression of this air at the end of the race to assist the absorption, one will be able to remove all or part of the front panel or leave a substantial gap between the seat base and the seat. In the latter case, the seat is mounted on its base by means of spacer length adapted to the desired seat height. 3- The progressiveness of the deformation can also be obtained by varying the thickness of the panels. A progressive thickness of the panel, from its base to its end, horizontal projection, can influence the progressivity but this form will be more expensive to achieve. The progressivity of the deformation can be obtained by varying the lengths of the straight sections between two plies. 5- The progressivity of the deformation can be obtained by varying the opening angle of the arc forming the fold.

Les dessins annexes illustrent l'invention. 40 La figure 1 montre une vue d'ensemble en perspective d'un montage a 4 panneaux dans son environnement. La figure 2 montre le montage a 4 panneaux sans son environnement. La figure 3 montre les éléments en éclaté. Le cadre supérieur avec son épaisseur et sa forme en croix sont nécessaire au maintient de l'intégrité de l'ensemble au moment de l'écrasement. 45 La figure 4 montre la forme d'un panneau en coupe. 50 Réalisation du dispositif:  The accompanying drawings illustrate the invention. Figure 1 shows an overall perspective view of a 4-panel assembly in its environment. Figure 2 shows the 4 panel mounting without its environment. Figure 3 shows the exploded elements. The upper frame with its thickness and cross shape is necessary to maintain the integrity of the assembly at the time of crushing. Figure 4 shows the shape of a sectional panel. 50 Realization of the device:

Les panneaux utilisés pour réaliser le dispositif peuvent être formés à partir d'un simple morceau de tôle passé plusieurs fois dans une plieuse pour lui donner une forme dite en "accordéon". Les panneaux sont ensuite assemblés et soudés sur leurs tranches pour rigidifier et stabiliser leur structure. Une bande de fer plat de largeur conséquente est rajoutée par soudure tout autour des ouvertures inférieures et supérieures. Cette bande permet de souder ou de boulonner le dispositif au plancher d'un coté et au siège de l'autre coté. 15 20 25 30 35 40 45 3 50  The panels used to make the device can be formed from a simple piece of sheet metal passed several times in a folder to give it a so-called "accordion" shape. The panels are then assembled and welded on their slices to stiffen and stabilize their structure. A band of flat iron of substantial width is added by welding all around the lower and upper openings. This strip is used to weld or bolt the device to the floor on one side and the seat on the other side. 15 20 25 30 35 40 45 3 50

Claims (5)

Revendicationsclaims : 1- Dispositif pour absorber progressivement l'accélération induite au siège d'un occupant de véhicule a roues ou a chenilles conséquentes a l'accélération induite a ce même véhicule lors d'une explosion sous celui-ci, caractérisé en ce que ce dispositif est constitué de panneaux préformés et assemblés entre eux de sorte a se déformer progressivement sous l'effet de l'écrasement.  : 1 device for progressively absorbing the induced acceleration at the seat of an occupant of a wheeled or crawler vehicle consistent with the acceleration induced to the same vehicle during an explosion beneath it, characterized in that this device consists of panels preformed and assembled together so as to deform progressively under the effect of crushing. 2- Dispositif selon la revendication 1 caractérisé en ce qu'il tient dans le volume entre le plancher du véhicule et la base du siège et sans dépasser l'aplomb vertical de la base du siège.  2- Device according to claim 1 characterized in that it is in the volume between the floor of the vehicle and the base of the seat and without exceeding the vertical plumb of the seat base. 3- Dispositif selon la revendication 1 caractérisé en ce qu'il peut être monté rétroactivement dans un véhicule.  3- Device according to claim 1 characterized in that it can be mounted retroactively in a vehicle. 4- Dispositif selon la revendication 1 caractérisé en ce qu'il permet un ajustement de la progressivité de l'absorption.  4- Device according to claim 1 characterized in that it allows an adjustment of the progressiveness of the absorption. 5- Dispositif selon la revendication 1 caractérisé en ce qu'il permet un ajustement de la direction suivi par la déformation au moment de l'absorption. 25 30 35 40 45 4 50  5- Device according to claim 1 characterized in that it allows an adjustment of the direction followed by the deformation at the time of absorption. 25 30 35 40 45 4 50
FR0605039A 2006-05-31 2006-05-31 Device for progressively absorbing an acceleration induced at an occupant seat of a vehicle with large wheels or a endless track, comprises panels that are preformed and assembled to deform itself progressively under the effect of crushing Pending FR2901750A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0605039A FR2901750A1 (en) 2006-05-31 2006-05-31 Device for progressively absorbing an acceleration induced at an occupant seat of a vehicle with large wheels or a endless track, comprises panels that are preformed and assembled to deform itself progressively under the effect of crushing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0605039A FR2901750A1 (en) 2006-05-31 2006-05-31 Device for progressively absorbing an acceleration induced at an occupant seat of a vehicle with large wheels or a endless track, comprises panels that are preformed and assembled to deform itself progressively under the effect of crushing

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FR2901750A1 true FR2901750A1 (en) 2007-12-07

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FR0605039A Pending FR2901750A1 (en) 2006-05-31 2006-05-31 Device for progressively absorbing an acceleration induced at an occupant seat of a vehicle with large wheels or a endless track, comprises panels that are preformed and assembled to deform itself progressively under the effect of crushing

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3104113A1 (en) * 2014-07-29 2016-12-14 Santa Bárbara Sistemas, S.A. Suspended perforated floor for armored vehicles
CN107082032A (en) * 2011-06-07 2017-08-22 英诺华直升飞机新西兰科技控股有限公司 Aircraft seat
WO2020239362A1 (en) * 2019-05-29 2020-12-03 Rheinmetall Waffe Munition Gmbh Detonation energy absorption device and vehicle equipped with same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107082032A (en) * 2011-06-07 2017-08-22 英诺华直升飞机新西兰科技控股有限公司 Aircraft seat
EP3104113A1 (en) * 2014-07-29 2016-12-14 Santa Bárbara Sistemas, S.A. Suspended perforated floor for armored vehicles
WO2020239362A1 (en) * 2019-05-29 2020-12-03 Rheinmetall Waffe Munition Gmbh Detonation energy absorption device and vehicle equipped with same
DE102019114514A1 (en) * 2019-05-29 2020-12-03 Rheinmetall Waffe Munition Gmbh Energy absorbing device and vehicle
AU2020284371B2 (en) * 2019-05-29 2023-09-28 Rheinmetall Waffe Munition Gmbh Detonation energy absorption device and vehicle equipped with same

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