WO2002002393A1 - Motor vehicle body shell designed to limit injuries inflicted to passengers' ankles in case of accident - Google Patents

Motor vehicle body shell designed to limit injuries inflicted to passengers' ankles in case of accident Download PDF

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Publication number
WO2002002393A1
WO2002002393A1 PCT/FR2001/001972 FR0101972W WO0202393A1 WO 2002002393 A1 WO2002002393 A1 WO 2002002393A1 FR 0101972 W FR0101972 W FR 0101972W WO 0202393 A1 WO0202393 A1 WO 0202393A1
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WO
WIPO (PCT)
Prior art keywords
floor
box
relative
deck
event
Prior art date
Application number
PCT/FR2001/001972
Other languages
French (fr)
Inventor
Bernard Vitry
Original Assignee
Renault
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 Renault filed Critical Renault
Priority to JP2002507662A priority Critical patent/JP2004502588A/en
Priority to EP01947583A priority patent/EP1296871A1/en
Publication of WO2002002393A1 publication Critical patent/WO2002002393A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
    • B62D25/2018—Floors or bottom sub-units in connection with other superstructure subunits the subunits being front structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body

Definitions

  • the present invention relates to a motor vehicle body designed to limit injuries to the ankles of passengers in the event of an accident.
  • a motor vehicle body notably comprises a cockpit floor and a driving position apron extending forward from this floor.
  • This apron is intended to receive a plate supporting various members including the pedals for controlling the running of the vehicle.
  • the present invention aims to provide a motor vehicle body of the aforementioned type which makes it possible to limit the risks of occurrence of such injuries in the event of an accident.
  • This object of the invention is achieved with a motor vehicle body comprising in particular a cockpit floor and a driving position apron extending forward from said floor, remarkable in that it comprises means for limit the rotation of said apron relative to said floor under the effect of a particularly frontal impact. Thanks to these characteristics, it is possible to limit the rotational movement of the feet of the passengers in the direction of their legs under the effect of the rotation of the apron in the event of a particularly frontal impact, which makes it possible to limit the risks of occurrence of injuries to ankles.
  • said means comprise means for weakening the resistance of a part of said floor to shear caused by an intrusion of said apron in the event of a frontal impact in particular, - said weakening means comprise ribs formed in said floor part, said ribs are oriented substantially perpendicular to the natural deformation lines diagonally of said floor part under the effect of a particularly frontal impact,
  • said weakening means comprise a zone of lesser thickness located in said part of the floor
  • said weakening means comprise a relatively low Young's modulus zone located in said floor part
  • the said box also comprises a front cradle
  • the said means for limiting the rotation of the said apron relative to the said floor further comprises "" means for limiting the rotation of the said apron with respect to the said cradle in the event of a particularly frontal impact
  • Said means for limiting the rotation of said apron relative to said cradle comprises at least one guide pin integral with said apron and at least one guide cavity integral with said front cradle, said cavity being capable of fitting onto said pin in the event of recoil said cradle under the effect of a particularly frontal impact
  • said body further comprises at least one central spar extending along said floor rearward from said deck
  • said means for limiting the rotation of said deck include in addition to means for allowing said spar to retreat relative to said floor under the effect of a particularly frontal impact
  • the said means for allowing the retraction of the said central spar comprise a free space provided between the said barrier and the said spar
  • said box also comprises a closed barrier extending at the rear of said floor, and said means for allowing the recoil of said central spar comprise a part formed in a rear zone of this spar having less resistance to normal forces
  • - said body further comprises a cross member under seat and means for connecting said central spar to said cross member, and said means for allowing the recoil of said spar comprise fusible parts- formed in said connecting means
  • - said body further comprises means to guide said central beam with respect to said cross member under seat in the event of a particularly frontal impact
  • the said guide means comprise notches formed in the said central spar or in the said cross member under the seat so as to allow the sliding of the said spar relative to the said cross member in the event of a particularly frontal impact
  • Said means for limiting the rotation of said deck relative to said floor further comprises reinforcements interposed between said floor and said deck.
  • the present invention a. also relates to a motor vehicle, remarkable in that it comprises a body conforming to the above.
  • Other characteristics and advantages of the present invention will appear on reading the description which follows and on examining the appended drawing, in which:
  • FIG. 1 is a schematic top view of a part of the box according to the invention
  • FIG. 2 is a diagrammatic side view on a larger scale of zone II of FIG. 1,
  • - Figure 3 is a schematic perspective view on a larger scale of the area III of Figure 1
  • - Figure 4 is a schematic view for comparing the mode of deformation of the body according to the invention in case of accident in the connection area between the floor and the deck to that of a box of the prior art.
  • identical references designate identical or similar members or sets of members.
  • the body 1 of the motor vehicle 2 comprises a floor 3 of the passenger compartment 4 and, extending forward
  • a cockpit apron 5 (i.e. to the left of the drawing sheet), a cockpit apron 5.
  • This apron is typically intended to receive a plate supporting in particular a crankset (these members not being shown) for controlling the running of the motor vehicle 2.
  • the apron 5 and the bottom bracket form a partition making it possible to separate the passenger compartment 4 d 'a front compartment 7 generally intended to receive an engine (not shown) for propelling the motor vehicle 2.
  • the body 1 may further comprise two front side members 9a, 9b, a front cradle 11 connected to these front side members by two cradle side members 13a, 13b, two long legs 15a, 15b, a transom of the driving position 17, a tunnel 19, two central beams 21a, 21b, two flaps 23a, 23b, a cross member under seat 24 and a bumper 27.
  • the parts 25a, 25b of the floor 3 which are located between the central beams 21a, 21b, the flaps 23a, 23b and the cross member under seat 25 comprise ribs 27a, 27b oriented at an angle as shown in the figure.
  • the floor 3 may include areas of reduced thickness located in the parts 25a, 25b.
  • the floor 3 may include zones having a relatively low Young's modulus located in the parts 25a, 25b.
  • these variants are not mutually exclusive, and one can perfectly consider combining them.
  • the box according to the invention also includes guide pins 29 fixed on the deck 5 and extending in the direction of the front compartment 7, and the cradle rails 13a, 13b , which are fixed to the front side members 9a, 9b by fasteners 31, include guide cavities 33 located opposite the pins 29.
  • the central beams 21a, 21b do not extend as far as the barrier 27.
  • the central beams can extend to the barrier 27, and the rear parts of these beams can have less resistance to normal forces (that is to say, say efforts oriented parallel to these beams).
  • the cross member under seat 24 has notches 35 through which extend the central beams 21a, 21b, and tongues 37 formed on the edges of these notches are fixed on the side members 21a, 21b by fusible means such as suitably sized welds.
  • the notches and the tongues could be formed in the central beams, the cross member under seat then extending through these notches.
  • reinforcements such as brackets 39 are interposed between the floor 3 and the deck 5.
  • orientation of the ribs 27a, 27b is in fact substantially perpendicular to the natural deformation lines diagonally of the floor parts 25a, 25b under the effect of a particularly frontal impact.
  • the cradle 11 and the cradle rails 13a, 13b recede, which has the effect of fitting the guide cavities 33 onto the guide pins 29. Furthermore, the fact that the central beams 21a, 21b do not extend as far as the barrier 27 or, as a variant, that these beams have rear parts having less resistance to normal forces, these beams can retreat by relative to the floor 3 under the effect of a shock, especially a frontal impact.
  • fusible link means between the tongues 37 and the central beams 21a, 21b also allows these beams to detach from the crosspiece 25 in the event of a particularly frontal impact, which promotes the backward movement of these beams.
  • notches formed in the cross-member 25 or, as a variant, in the longitudinal members 21a, 21b make it possible to guide these parts relative to one another, and thus to control their movements in the event of a collision, in particular frontal impact.
  • the reinforcements 39 also contribute to obtaining this result. Thanks to these characteristics, the body according to the invention in fact makes it possible to substantially obtain a translational movement of the apron 5 towards the interior of the passenger compartment 4 in the event of a particularly frontal impact, as can be seen in FIG. 4 where we have represented:
  • the translational movement of the deck 5 obtained with the body according to the invention makes it possible, after the impact, to obtain an angle ⁇ between the foot 45 and the leg 47 which is greater than the angle ⁇ 'that would be obtained with a box of the prior art in which the deck would tend to rotate relative to the floor towards the interior of the passenger compartment.
  • the body of the invention thus limits the passengers' feet of rotational movement in steering their legs as a result of the rotation of the deck accident, which limits the risks of recurring ankle injuries.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention concerns a motor vehicle (2) body shell (1) comprising in particular a passenger compartment (4) floor (3) and a driver's compartment dash panel (5) extending forwards from the floor (3). The invention is characterised in that it comprises means (27a, 27b) for limiting the rotation of said dash panel (5) relative to the floor (3) under the effect of an impact, in particular at the front.

Description

Caisse de véhicule automobile conçue pour limiter les lésions infligées aux chevilles des passagers en cas d' accident . La présente invention est relative à une caisse de véhicule automobile conçue pour limiter les lésions infligées aux chevilles des passagers en cas d'accident. Motor vehicle body designed to limit injury to the ankles of passengers in the event of an accident. The present invention relates to a motor vehicle body designed to limit injuries to the ankles of passengers in the event of an accident.
Classiquement, une caisse de véhicule automobile comprend notamment un plancher d'habitacle et un tablier de poste de conduite s'étendant vers l'avant à partir de ce plancher.Conventionally, a motor vehicle body notably comprises a cockpit floor and a driving position apron extending forward from this floor.
Ce tablier est destiné à recevoir une platine supportant différents organes parmi lesquels le pédalier permettant de commander la marche du véhicule.This apron is intended to receive a plate supporting various members including the pedals for controlling the running of the vehicle.
On a pu constater qu'en cas d'accident, et notamment de choc frontal, les passagers assis à l'avant de véhicules comportant des caisses du type susmentionné subissaient fréquemment de graves lésions au niveau des chevilles .It has been found that in the event of an accident, and in particular of a frontal impact, passengers seated in front of vehicles with boxes of the aforementioned type frequently suffered serious injuries to the ankles.
La présente invention a pour but de fournir une caisse de véhicule automobile du type susmentionné qui permette de limiter les risques d'occurrence de telles lésions en cas d'accident.The present invention aims to provide a motor vehicle body of the aforementioned type which makes it possible to limit the risks of occurrence of such injuries in the event of an accident.
On atteint ce but de l'invention avec une caisse de véhicule automobile comportant notamment un plancher d'habitacle et un tablier de poste de conduite s'étendant vers l'avant à partir dudit plancher, remarquable en ce qu' elle comprend des moyens pour limiter la rotation dudit tablier par rapport audit plancher sous l'effet d'un choc notamment frontal. Grâce à ces caractéristiques, on peut limiter le mouvement de rotation des pieds des passagers en direction de leurs jambes sous l'effet de la rotation du tablier en cas de choc notamment frontal, ce qui permet de limiter les risques d' occurrence de lésions aux chevilles.This object of the invention is achieved with a motor vehicle body comprising in particular a cockpit floor and a driving position apron extending forward from said floor, remarkable in that it comprises means for limit the rotation of said apron relative to said floor under the effect of a particularly frontal impact. Thanks to these characteristics, it is possible to limit the rotational movement of the feet of the passengers in the direction of their legs under the effect of the rotation of the apron in the event of a particularly frontal impact, which makes it possible to limit the risks of occurrence of injuries to ankles.
Suivant d'autres caractéristiques de la caisse selon l'invention : lesdits moyens comprennent des moyens pour affaiblir la résistance d'une partie dudit plancher au cisaillement provoqué par une intrusion dudit tablier en cas de choc notamment frontal, - lesdits moyens d'affaiblissement comprennent des nervures formées dans ladite partie de plancher, lesdites nervures sont orientées de manière sensiblement perpendiculaire aux lignes de déformation naturelle en diagonale de ladite partie de plancher sous l'effet d'un choc notamment frontal,According to other characteristics of the box according to the invention: said means comprise means for weakening the resistance of a part of said floor to shear caused by an intrusion of said apron in the event of a frontal impact in particular, - said weakening means comprise ribs formed in said floor part, said ribs are oriented substantially perpendicular to the natural deformation lines diagonally of said floor part under the effect of a particularly frontal impact,
- lesdits moyens d' affaiblissement comprennent une zone de moindre épaisseur située dans ladite partie de plancher,- said weakening means comprise a zone of lesser thickness located in said part of the floor,
- lesdits moyens d'affaiblissement comprennent une zone de module d'Young relativement faible située dans ladite partie de plancher,said weakening means comprise a relatively low Young's modulus zone located in said floor part,
- ladite caisse comprend en outre un berceau avant, et lesdits moyens pour limiter la rotation dudit tablier par rapport audit plancher comprennent en outre "" des moyens pour limiter la rotation dudit tablier par rapport audit berceau en cas de choc notamment frontal,the said box also comprises a front cradle, and the said means for limiting the rotation of the said apron relative to the said floor further comprises "" means for limiting the rotation of the said apron with respect to the said cradle in the event of a particularly frontal impact,
- lesdits moyens pour limiter la rotation dudit tablier par rapport audit berceau comprennent au moins un pion de guidage solidaire dudit tablier et au moins une cavité de guidage solidaire dudit berceau avant, ladite cavité étant susceptible de s'emboîter sur ledit pion en cas de recul dudit berceau sous l'effet d'un choc notamment frontal, ladite caisse comprend en outre au moins un longeron central s'étendant le long dudit plancher vers l'arrière à partir dudit tablier, et lesdits moyens pour limiter la rotation dudit tablier comprennent en outre des moyens pour permettre audit longeron de reculer par rapport audit plancher sous l'effet d'un choc notamment frontal, lesdits moyens pour permettre le recul dudit longeron central comprennent un espace libre ménagé entre ladite pare-close et ledit longeron,- Said means for limiting the rotation of said apron relative to said cradle comprises at least one guide pin integral with said apron and at least one guide cavity integral with said front cradle, said cavity being capable of fitting onto said pin in the event of recoil said cradle under the effect of a particularly frontal impact, said body further comprises at least one central spar extending along said floor rearward from said deck, and said means for limiting the rotation of said deck include in addition to means for allowing said spar to retreat relative to said floor under the effect of a particularly frontal impact, the said means for allowing the retraction of the said central spar comprise a free space provided between the said barrier and the said spar,
- ladite caisse comprend en outre une pare-close s'étendant à l'arrière dudit plancher, et lesdits moyens pour permettre le recul dudit longeron central comprennent une partie formée dans une zone arrière de ce longeron présentant une moindre résistance aux efforts normaux, - ladite caisse comprend en outre une traverse sous siège et des moyens pour relier ledit longeron central à ladite traverse, et lesdits moyens pour permettre le recul dudit longeron comprennent des parties fusibles- formées dans lesdits moyens de liaison, - ladite caisse comprend en outre des moyens pour guider ledit longeron central par rapport à ladite traverse sous siège en cas de choc notamment frontal,- said box also comprises a closed barrier extending at the rear of said floor, and said means for allowing the recoil of said central spar comprise a part formed in a rear zone of this spar having less resistance to normal forces, - said body further comprises a cross member under seat and means for connecting said central spar to said cross member, and said means for allowing the recoil of said spar comprise fusible parts- formed in said connecting means, - said body further comprises means to guide said central beam with respect to said cross member under seat in the event of a particularly frontal impact,
- lesdits moyens de guidage comprennent des encoches formées dans ledit longeron central ou dans ladite traverse sous siège de manière à permettre le glissement dudit longeron par rapport à ladite traverse en cas de choc notamment frontal,the said guide means comprise notches formed in the said central spar or in the said cross member under the seat so as to allow the sliding of the said spar relative to the said cross member in the event of a particularly frontal impact,
- lesdits moyens pour limiter la rotation dudit tablier par rapport audit plancher comprennent en outre des renforts interposés entre ledit plancher et ledit tablier.- Said means for limiting the rotation of said deck relative to said floor further comprises reinforcements interposed between said floor and said deck.
La présente invention a . également pour objet un véhicule automobile, remarquable en ce qu'il comporte une caisse conforme à ce qui précède. D' autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre et à l'examen du dessin annexé, dans lequel :The present invention a. also relates to a motor vehicle, remarkable in that it comprises a body conforming to the above. Other characteristics and advantages of the present invention will appear on reading the description which follows and on examining the appended drawing, in which:
- la figure 1 est une vue schématique de dessus d' une partie de la caisse selon l' invention, - la figure 2 est une vue schématique de côté à plus grande échelle de la zone II de la figure 1,FIG. 1 is a schematic top view of a part of the box according to the invention, FIG. 2 is a diagrammatic side view on a larger scale of zone II of FIG. 1,
- la figure 3 est une vue schématique en perspective à plus grande échelle de la zone III de la figure 1, et - la figure 4 est une vue schématique permettant de comparer le mode de déformation de la caisse selon l'invention en cas d'accident dans la zone de liaison entre le plancher et le tablier à celui d'une caisse de la technique antérieure. Sur ces figures, des références identiques désignent des organes ou ensembles d' organes identiques ou analogues .- Figure 3 is a schematic perspective view on a larger scale of the area III of Figure 1, and - Figure 4 is a schematic view for comparing the mode of deformation of the body according to the invention in case of accident in the connection area between the floor and the deck to that of a box of the prior art. In these figures, identical references designate identical or similar members or sets of members.
Dans ce qui suit, les termes « avant », « arrière », « droite » et « gauche » doivent s'entendre par rapport au sens de la marche du véhicule automobile.In what follows, the terms "front", "rear", "right" and "left" must be understood in relation to the direction of travel of the motor vehicle.
On se reporte à présent à la figure 1, sur laquelle on voit que la caisse 1 de véhicule automobile 2 comprend un plancher 3 d'habitacle 4 et, s'étendant vers l'avantReferring now to Figure 1, in which we see that the body 1 of the motor vehicle 2 comprises a floor 3 of the passenger compartment 4 and, extending forward
(c'est-à-dire vers la gauche de la feuille du dessin), un tablier de poste de conduite 5.(i.e. to the left of the drawing sheet), a cockpit apron 5.
Ce tablier est typiquement destiné à recevoir une platine supportant notamment un pédalier (ces organes n'étant pas représentés) pour commander la marche du véhicule automobile 2. Le tablier 5 et la platine de pédalier forment une cloison permettant de séparer l'habitacle 4 d'un compartiment avant 7 généralement destiné à recevoir un moteur (non représenté) permettant de propulser le véhicule automobile 2. Comme cela est connu en soi, la caisse 1 peut en outre comprendre deux longerons avant 9a, 9b, un berceau avant 11 relié à ces longerons avant par deux longerons de berceau 13a, 13b, deux longs-pieds 15a, 15b, une traverse de poste de conduite 17, un tunnel 19, deux longerons centraux 21a, 21b, deux bavolets 23a, 23b, une traverse sous siège 24 et une pare-close 27.This apron is typically intended to receive a plate supporting in particular a crankset (these members not being shown) for controlling the running of the motor vehicle 2. The apron 5 and the bottom bracket form a partition making it possible to separate the passenger compartment 4 d 'a front compartment 7 generally intended to receive an engine (not shown) for propelling the motor vehicle 2. As is known per se, the body 1 may further comprise two front side members 9a, 9b, a front cradle 11 connected to these front side members by two cradle side members 13a, 13b, two long legs 15a, 15b, a transom of the driving position 17, a tunnel 19, two central beams 21a, 21b, two flaps 23a, 23b, a cross member under seat 24 and a bumper 27.
De préférence, les parties 25a, 25b du plancher 3 qui sont situées entre les longerons centraux 21a, 21b, les bavolets 23a, 23b et la traverse sous siège 25 comprennent des nervures 27a, 27b orientées en biais comme indiqué sur la figure.Preferably, the parts 25a, 25b of the floor 3 which are located between the central beams 21a, 21b, the flaps 23a, 23b and the cross member under seat 25 comprise ribs 27a, 27b oriented at an angle as shown in the figure.
Selon une première variante de cette caractéristique, le plancher 3 peut comprendre des zones de moindre épaisseur situées dans les parties 25a, 25b.According to a first variant of this characteristic, the floor 3 may include areas of reduced thickness located in the parts 25a, 25b.
Selon une deuxième variante de cette caractéristique, le plancher 3 peut comprendre des zones présentant un module d'Young relativement faible situées dans les parties 25a, 25b. Bien entendu, ces variantes ne sont pas exclusives les unes des autres, et l'on peut parfaitement envisager de les combiner.According to a second variant of this characteristic, the floor 3 may include zones having a relatively low Young's modulus located in the parts 25a, 25b. Of course, these variants are not mutually exclusive, and one can perfectly consider combining them.
De préférence, et comme cela est visible sur la figure 2, la caisse selon l'invention comprend également des pions de guidage 29 fixés sur le tablier 5 et s'étendant en direction du compartiment avant 7, et les longerons de berceau 13a, 13b, qui sont fixés aux longerons avant 9a, 9b par des attaches 31, comprennent des cavités de guidage 33 situées en vis-à-vis des pions 29.Preferably, and as can be seen in FIG. 2, the box according to the invention also includes guide pins 29 fixed on the deck 5 and extending in the direction of the front compartment 7, and the cradle rails 13a, 13b , which are fixed to the front side members 9a, 9b by fasteners 31, include guide cavities 33 located opposite the pins 29.
De préférence, et comme cela est visible sur la figure 1, les longerons centraux 21a, 21b ne s'étendent pas jusqu'à la pare-close 27.Preferably, and as can be seen in FIG. 1, the central beams 21a, 21b do not extend as far as the barrier 27.
Selon une variante possible et non représentée de cette dernière caractéristique, les longerons centraux peuvent s'étendre jusqu'à la pare-close 27, et les parties arrière de ces longerons peuvent présenter une moindre résistance aux efforts normaux (c'est-à-dire aux efforts orientés parallèlement à ces longerons) . De préférence, et comme cela est visible sur la figure 3, la traverse sous siège 24 comporte des encoches 35 à travers lesquelles s'étendent les longerons centraux 21a, 21b, et des languettes 37 formées sur les bords de ces encoches sont fixées sur les longerons 21a, 21b par des moyens fusibles tels que des soudures convenablement dimensionnées .According to a possible variant, not shown, of this last characteristic, the central beams can extend to the barrier 27, and the rear parts of these beams can have less resistance to normal forces (that is to say, say efforts oriented parallel to these beams). Preferably, and as can be seen in FIG. 3, the cross member under seat 24 has notches 35 through which extend the central beams 21a, 21b, and tongues 37 formed on the edges of these notches are fixed on the side members 21a, 21b by fusible means such as suitably sized welds.
Selon une variante possible et non représentée de ces dernières caractéristiques, les encoches et les languettes pourraient être formées dans les longerons centraux, la traverse sous siège s'étendant alors à travers ces encoches.According to a possible and not shown variant of these latter characteristics, the notches and the tongues could be formed in the central beams, the cross member under seat then extending through these notches.
De préférence, et comme cela est visible sur la figure 3, des renforts tels que des équerres 39 sont interposés entre le plancher 3 et le tablier 5.Preferably, and as can be seen in FIG. 3, reinforcements such as brackets 39 are interposed between the floor 3 and the deck 5.
Le comportement de la caisse 1 selon l'invention en cas de choc notamment frontal et les avantages de cette caisse découlent des caractéristiques exposées ci-avant.The behavior of the body 1 according to the invention in the event of a particularly frontal impact and the advantages of this body arise from the characteristics set out above.
Le fait que les parties 25a, 25b du plancher 3 présentent des- nervures 27a, 27b ou/et des zones de moindre épaisseur ou/et des zones de module d'Young relativement faible, entraîne que ces parties 25a, 25b présentent une moindre résistance au cisaillement provoqué par une intrusion du tablier 5 à l'intérieur de l'habitacle 4 sous l'effet d'un choc notamment frontal.The fact that the parts 25a, 25b of the floor 3 have ribs 27a, 27b or / and zones of reduced thickness or / and zones of relatively low Young modulus, means that these parts 25a, 25b have less resistance shear caused by an intrusion of the deck 5 inside the passenger compartment 4 under the effect of a particularly frontal impact.
On notera que l'orientation des nervures 27a, 27b est en fait sensiblement perpendiculaire aux lignes de déformation naturelle en diagonale des parties de plancher 25a, 25b sous l'effet d'un choc notamment frontal.It will be noted that the orientation of the ribs 27a, 27b is in fact substantially perpendicular to the natural deformation lines diagonally of the floor parts 25a, 25b under the effect of a particularly frontal impact.
En outre, en cas de choc notamment frontal, le berceau 11 et les longerons de berceaux 13a, 13b reculent, ce qui a pour effet d'emboîter les cavités de guidage 33 sur les pions de guidage 29. Par ailleurs, du fait que les longerons centraux 21a, 21b ne s'étendent pas jusqu'à la pare-close 27 ou, en variante, que ces longerons comportent des parties arrière présentant une moindre résistance aux efforts normaux, ces longerons peuvent reculer par rapport au plancher 3 sous l'effet d'un choc notamment frontal.In addition, in the event of a particularly frontal impact, the cradle 11 and the cradle rails 13a, 13b recede, which has the effect of fitting the guide cavities 33 onto the guide pins 29. Furthermore, the fact that the central beams 21a, 21b do not extend as far as the barrier 27 or, as a variant, that these beams have rear parts having less resistance to normal forces, these beams can retreat by relative to the floor 3 under the effect of a shock, especially a frontal impact.
La présence de moyens de liaison fusibles entre les languettes 37 et les longerons centraux 21a, 21b permet en outre à ces longerons de se désolidariser de la traverse 25 en cas de choc notamment frontal, ce qui favorise le mouvement de recul de ces longerons.The presence of fusible link means between the tongues 37 and the central beams 21a, 21b also allows these beams to detach from the crosspiece 25 in the event of a particularly frontal impact, which promotes the backward movement of these beams.
On notera également que les encoches formées dans la traverse 25 ou, en variante, dans les longerons 21a, 21b, permettent de guider ces pièces les unes par rapport aux autres, et ainsi de contrôler leurs déplacements en cas de choc notamment frontal.It will also be noted that the notches formed in the cross-member 25 or, as a variant, in the longitudinal members 21a, 21b, make it possible to guide these parts relative to one another, and thus to control their movements in the event of a collision, in particular frontal impact.
Il résulte de l'ensemble de ces caractéristiques qu'en cas de choc notamment frontal, le tablier 5 ne peut que très faiblement tourner par rapport au plancher 3 vers l'intérieur de l'habitacle 4.It follows from all of these characteristics that in the event of a particularly frontal impact, the deck 5 can only turn very slightly relative to the floor 3 towards the interior of the passenger compartment 4.
En effet, le fait que les parties 25a, 25b du plancher 3 présentent une résistance moindre et le fait que les longerons centraux 21a, 21b puissent reculer par rapport au plancher 3 permettent de réduire l'écart de déplacement entre les parties supérieure 41 et inférieure 43 (voir figure 2) du tablier 5 en cas de choc notamment frontal .Indeed, the fact that the parts 25a, 25b of the floor 3 have less resistance and the fact that the central beams 21a, 21b can move back relative to the floor 3 make it possible to reduce the difference in displacement between the upper 41 and lower parts 43 (see FIG. 2) of the deck 5 in the event of a particularly frontal impact.
Le fait que les cavités de guidage 33 puissent s'emboîter sur les pions de guidage 29 a pour effet de limiter la rotation du tablier 5 par rapport au berceauThe fact that the guide cavities 33 can fit onto the guide pins 29 has the effect of limiting the rotation of the deck 5 relative to the cradle
33, et par là même de limiter la rotation du tablier 5 par rapport au plancher 3.33, and thereby limit the rotation of the deck 5 relative to the floor 3.
Les renforts 39 contribuent également à l'obtention de ce résultat. Grâce à ces caractéristiques, la caisse selon l'invention permet en fait d'obtenir sensiblement un mouvement de translation du tablier 5 vers l'intérieur de l'habitacle 4 en cas de choc notamment frontal, comme cela est visible sur la figure 4 où l'on a représenté :The reinforcements 39 also contribute to obtaining this result. Thanks to these characteristics, the body according to the invention in fact makes it possible to substantially obtain a translational movement of the apron 5 towards the interior of the passenger compartment 4 in the event of a particularly frontal impact, as can be seen in FIG. 4 where we have represented:
- en trait continu, la position du tablier 5 avant un choc notamment frontal,- in solid line, the position of the deck 5 before a particularly frontal impact,
- en trait discontinu, la position de ce tablier, du pied 45 et d'une jambe 47 d'un passager après un tel choc, etin broken lines, the position of this apron, the foot 45 and a leg 47 of a passenger after such a shock, and
- en trait mixte, la position qu'occuperaient ce tablier, ce pied et cette jambe après un tel choc dans une caisse de véhicule de la technique antérieure.- in a dashed line, the position that this apron, this foot and this leg would occupy after such a shock in a vehicle body of the prior art.
Comme cela apparaît à l'examen de cette figure, le mouvement de translation du tablier 5 obtenu avec la caisse selon l'invention permet, après le choc, d'obtenir un angle α entre le pied 45 et la jambe 47 qui est supérieur à l'angle α' que l'on obtiendrait avec une caisse de la technique antérieure dans laquelle le tablier aurait tendance à tourner par rapport au plancher vers l'intérieur de l'habitacle.As appears on examining this figure, the translational movement of the deck 5 obtained with the body according to the invention makes it possible, after the impact, to obtain an angle α between the foot 45 and the leg 47 which is greater than the angle α 'that would be obtained with a box of the prior art in which the deck would tend to rotate relative to the floor towards the interior of the passenger compartment.
La caisse selon l'invention permet ainsi de limiter le mouvement de rotation des pieds des passagers en' direction de leurs jambes sous l'effet de la rotation du tablier en cas d'accident, ce qui permet de limiter les risques d'occurrence de lésions aux chevilles.The body of the invention thus limits the passengers' feet of rotational movement in steering their legs as a result of the rotation of the deck accident, which limits the risks of recurring ankle injuries.
Bien entendu, la présente invention n'est pas limitée au mode de réalisation décrit et représenté, fourni à titre d'exemple illustratif et non limitatif. Of course, the present invention is not limited to the embodiment described and shown, provided by way of illustrative and nonlimiting example.

Claims

REVENDICATIONS
1. Caisse (1) de véhicule automobile (2) comportant notamment un plancher (3) d'habitacle (4) et un tablier de poste de conduite (5) s'étendant vers l'avant à partir dudit plancher (3), caractérisée en ce qu'elle comprend des moyens (27a, 27b, 29, 33, 39) pour limiter la rotation dudit tablier (5) par rapport audit plancher (3) sous l'effet d'un choc notamment frontal.1. Motor vehicle body (1) (2) comprising in particular a cockpit floor (3) (4) and a driving position apron (5) extending forward from said floor (3), characterized in that it comprises means (27a, 27b, 29, 33, 39) for limiting the rotation of said deck (5) relative to said floor (3) under the effect of a particularly frontal impact.
2. Caisse (1) selon la revendication 1, caractérisée en ce que lesdits moyens comprennent des moyens (27a,2. Box (1) according to claim 1, characterized in that said means comprise means (27a,
27b) pour affaiblir la résistance d'une partie (25a, 25b) dudit plancher (3) au cisaillement provoqué par une intrusion dudit tablier (5) en cas de choc notamment frontal . 3. Caisse (1) selon la revendication 2, caractérisée en ce que lesdits moyens d'affaiblissement comprennent des nervures (27a, 27b) formées dans ladite partie (25a, 25b) de plancher (3) .27b) to weaken the resistance of a part (25a, 25b) of said floor (3) to shear caused by an intrusion of said deck (5) in the event of a particularly frontal impact. 3. Box (1) according to claim 2, characterized in that said weakening means comprise ribs (27a, 27b) formed in said part (25a, 25b) of floor (3).
4. Caisse (1) selon la revendication 3, caractérisée en ce que lesdites nervures (27a, 27b) sont orientées de manière sensiblement perpendiculaire aux lignes de déformation naturelle en diagonale de ladite partie (25a, 25b) de plancher (3) sous l'effet d'un choc notamment frontal . 5. Caisse (1) selon l'une des revendications 3 ou 4, caractérisée en ce que lesdits moyens d'affaiblissement comprennent une zone de moindre épaisseur située dans ladite partie (25a, 25b) de plancher (3) .4. Box (1) according to claim 3, characterized in that said ribs (27a, 27b) are oriented substantially perpendicular to the natural deformation lines diagonally from said part (25a, 25b) of floor (3) under the effect of a particularly frontal shock. 5. Box (1) according to one of claims 3 or 4, characterized in that said weakening means comprise an area of reduced thickness located in said part (25a, 25b) of floor (3).
6. Caisse (1) selon l'une quelconque des revendications 3 à 5, caractérisée en ce que lesdits moyens d'affaiblissement comprennent une zone de module d'Young relativement faible située dans ladite partie (25a, 25b) de plancher (3) . l Caisse (1) selon l'une quelconque des revendications précédentes comprenant en outre un berceau avant (11), caractérisée en ce que lesdits moyens pour limiter la rotation dudit tablier (5) par rapport audit plancher (3) comprennent en outre des moyens (29, 33) pour limiter la rotation dudit tablier (5) par rapport audit berceau (11) en cas de choc notamment frontal.6. Box (1) according to any one of claims 3 to 5, characterized in that said weakening means comprise a relatively low Young's modulus zone located in said part (25a, 25b) of floor (3) . l Box (1) according to any preceding claim further comprising a cradle front (11), characterized in that said means for limiting the rotation of said apron (5) relative to said floor (3) further comprises means (29, 33) for limiting the rotation of said apron (5) relative to said cradle (11) in the event of a particularly frontal impact.
8. Caisse (1) selon la revendication 7, caractérisée en ce que lesdits moyens pour limiter la rotation dudit tablier (5) par rapport audit berceau (11) comprennent au moins un pion de guidage (29) solidaire dudit tablier (5) et au moins une cavité de guidage (33) solidaire dudit berceau avant (11), ladite cavité (33) étant susceptible de s'emboîter sur ledit pion (29) en cas de recul dudit berceau (11) sous l'effet d'un choc notamment frontal.8. Box (1) according to claim 7, characterized in that said means for limiting the rotation of said deck (5) relative to said cradle (11) comprise at least one guide pin (29) integral with said deck (5) and at least one guide cavity (33) integral with said front cradle (11), said cavity (33) being capable of fitting onto said pin (29) in the event of said cradle (11) receding under the effect of a especially frontal impact.
9. Caisse (1) selon l'une quelconque des revendications précédentes, comprenant en outre au moins un longeron central (21a, 21b) s'étendan le long dudit plancher (3) vers l'arrière à partir dudit tablier (5), caractérisée en ce que lesdits moyens pour limiter la rotation dudit tablier (5) comprennent en outre des moyens pour permettre audit longeron (21a, 21b) de reculer par rapport audit plancher (3) sous l'effet d'un choc notamment frontal.9. Box (1) according to any one of the preceding claims, further comprising at least one central spar (21a, 21b) extending along said floor (3) rearwards from said deck (5), characterized in that said means for limiting the rotation of said apron (5) further comprises means for allowing said spar (21a, 21b) to move back with respect to said floor (3) under the effect of a particularly frontal impact.
10. Caisse (1) selon la revendication 9, comprenant en outre une pare-close (27) s'étendant à l'arrière dudit plancher (3) , caractérisée en ce que lesdits moyens pour permettre le recul dudit longeron central (21a, 21b) comprennent un espace libre ménagé entre ladite pare- close (27) et ledit longeron (21a, 21b) .10. Box (1) according to claim 9, further comprising a windscreen (27) extending at the rear of said floor (3), characterized in that said means for allowing the recoil of said central spar (21a, 21b) comprise a free space formed between said windscreen (27) and said spar (21a, 21b).
11. Caisse (1) selon la revendication 9, comprenant en outre une pare-close (27) s'étendant à l'arrière dudit plancher (3) , caractérisée en ce que lesdits moyens pour permettre le recul dudit longeron central (21a, 21b) comprennent une partie formée dans une zone arrière de ce longeron présentant une moindre résistance aux efforts normau . 11. Box (1) according to claim 9, further comprising a windscreen (27) extending at the rear of said floor (3), characterized in that said means for allowing the recoil of said central spar (21a, 21b) comprise a part formed in a rear zone of this beam having less resistance to normal forces.
12. Caisse (1) selon l'une quelconque des revendications 9 à 11, comprenant en outre une traverse sous siège (24) et des moyens (37) pour relier ledit longeron central (21a, 21b) à ladite traverse, caractérisée en ce que lesdits moyens pour permettre le recul dudit longeron comprennent des parties fusibles formées dans lesdits moyens de liaison (37) .12. Box (1) according to any one of claims 9 to 11, further comprising a cross member under seat (24) and means (37) for connecting said central beam (21a, 21b) to said cross member, characterized in that that said means for allowing the retraction of said spar comprise fusible parts formed in said connecting means (37).
13. Caisse (1) selon la revendication 12, caractérisée en ce qu' elle comprend en outre des moyens (35) pour guider ledit longeron central (21a, 21b) par rapport à ladite traverse sous siège (24) en cas de choc notamment frontal .13. Box (1) according to claim 12, characterized in that it further comprises means (35) for guiding said central beam (21a, 21b) relative to said cross member under seat (24) in the event of an impact in particular frontal.
14. Caisse (1) selon la revendication 13, caractérisée en ce que lesdits moyens de guidage comprennent des encoches (35) formées dans ledit longeron central (21a, 21b) ou dans ladite traverse sous siège (24) de manière à permettre le glissement dudit longeron (21a, 21b) par rapport à ladite traverse (24) en cas de choc notamment frontal. 15. Caisse (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que lesdits moyens pour limiter la rotation dudit tablier (5) par rapport audit plancher (3) comprennent en outre des renforts (39) interposés entre ledit plancher (3) et ledit tablier (5) .14. Box (1) according to claim 13, characterized in that said guide means comprise notches (35) formed in said central beam (21a, 21b) or in said cross member under seat (24) so as to allow sliding of said beam (21a, 21b) relative to said crosspiece (24) in the event of a particularly frontal impact. 15. Box (1) according to any one of the preceding claims, characterized in that said means for limiting the rotation of said deck (5) relative to said floor (3) further comprise reinforcements (39) interposed between said floor ( 3) and said apron (5).
16. Véhicule automobile (2), caractérisé en ce qu'il comporte une caisse (1) conforme à l'une quelconque des revendications précédentes . 16. Motor vehicle (2), characterized in that it comprises a body (1) according to any one of the preceding claims.
PCT/FR2001/001972 2000-07-06 2001-06-22 Motor vehicle body shell designed to limit injuries inflicted to passengers' ankles in case of accident WO2002002393A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002507662A JP2004502588A (en) 2000-07-06 2001-06-22 A car body designed to limit the obstacles to the passenger's ankle in the event of an accident
EP01947583A EP1296871A1 (en) 2000-07-06 2001-06-22 Motor vehicle body shell designed to limit injuries inflicted to passengers' ankles in case of accident

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR00/08809 2000-07-06
FR0008809A FR2811282B1 (en) 2000-07-06 2000-07-06 MOTOR VEHICLE BODY DESIGNED TO LIMIT INJURIES INJURED TO PASSENGER ANKLES IN THE EVENT OF AN ACCIDENT

Publications (1)

Publication Number Publication Date
WO2002002393A1 true WO2002002393A1 (en) 2002-01-10

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PCT/FR2001/001972 WO2002002393A1 (en) 2000-07-06 2001-06-22 Motor vehicle body shell designed to limit injuries inflicted to passengers' ankles in case of accident

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EP (1) EP1296871A1 (en)
JP (1) JP2004502588A (en)
FR (1) FR2811282B1 (en)
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2011104042A3 (en) * 2010-02-24 2011-12-01 Robert Bosch Gmbh Vehicle comprising a deformable passenger compartment

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US5370438A (en) * 1991-10-31 1994-12-06 Toyota Jidosha Kabushiki Kaisha Structural member of automobile
US5611593A (en) * 1994-03-16 1997-03-18 Honda Giken Kogyo Kabushiki Kaisha Automotive floor panel assembly
US5944377A (en) * 1996-07-30 1999-08-31 Dr. Ing. H.C.F. Porsche Ag Floor assembly for a passenger car and method of making same
US5992921A (en) * 1996-03-19 1999-11-30 Toyota Jidosha Kabushiki Kaisha Vehicle body structure
EP0999118A2 (en) * 1998-11-04 2000-05-10 Ford Global Technologies, Inc. Secondary floor assembly for a motor vehicle

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
US5370438A (en) * 1991-10-31 1994-12-06 Toyota Jidosha Kabushiki Kaisha Structural member of automobile
US5611593A (en) * 1994-03-16 1997-03-18 Honda Giken Kogyo Kabushiki Kaisha Automotive floor panel assembly
US5992921A (en) * 1996-03-19 1999-11-30 Toyota Jidosha Kabushiki Kaisha Vehicle body structure
US5944377A (en) * 1996-07-30 1999-08-31 Dr. Ing. H.C.F. Porsche Ag Floor assembly for a passenger car and method of making same
EP0999118A2 (en) * 1998-11-04 2000-05-10 Ford Global Technologies, Inc. Secondary floor assembly for a motor vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011104042A3 (en) * 2010-02-24 2011-12-01 Robert Bosch Gmbh Vehicle comprising a deformable passenger compartment

Also Published As

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FR2811282A1 (en) 2002-01-11
JP2004502588A (en) 2004-01-29
FR2811282B1 (en) 2002-10-31
EP1296871A1 (en) 2003-04-02

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