EP3558793A1 - Longitudinal member for a rear structure of a vehicle chassis and vehicle comprising such a structure - Google Patents

Longitudinal member for a rear structure of a vehicle chassis and vehicle comprising such a structure

Info

Publication number
EP3558793A1
EP3558793A1 EP16828760.5A EP16828760A EP3558793A1 EP 3558793 A1 EP3558793 A1 EP 3558793A1 EP 16828760 A EP16828760 A EP 16828760A EP 3558793 A1 EP3558793 A1 EP 3558793A1
Authority
EP
European Patent Office
Prior art keywords
flanges
vehicle
profile
longeronnet
flange
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.)
Withdrawn
Application number
EP16828760.5A
Other languages
German (de)
French (fr)
Inventor
Olivier Richard
Vincent Higelin
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.)
PSA Automobiles SA
Original Assignee
PSA Automobiles 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 PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3558793A1 publication Critical patent/EP3558793A1/en
Withdrawn legal-status Critical Current

Links

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
    • B62D25/08—Front or rear portions

Definitions

  • the invention relates to a side member for a rear frame structure of the vehicle. It also relates to a vehicle chassis rear structure equipped with two longitudinal members, and a vehicle comprising such a rear structure.
  • the longitudinal members of a rear frame structure of a vehicle are well known to stiffen the chassis structure and ensure the connection including the rear suspension to the chassis.
  • these side rails intended to be connected to the bumper beam of the vehicle, are designed to deform in case of sudden shock, so as to absorb the kinetic energy of the shock.
  • These struts are obtained by stamping processes, which do not allow the use of materials with very high shades. This results in obtaining heavy parts, complex shapes, often difficult to install on the rear frame structure.
  • the structure of the vehicle must be adapted each time to ensure the feasibility of the vehicle, then the side rails must, for each type of vehicle, be the object of a specific development so that their length is adapted to the length of the floor charge.
  • each new spar is expensive, since it involves in particular the development of new tools and multiplies the number of parts to be managed in the factory. It has been proposed in FR 2 956 369 to produce a spar consisting of two parts such as hollow bodies each consisting of an inner and outer profile, extending in the extension of one another by having a covering area and thus allowing adaptation to the length of the silhouette of the vehicle, the recovery area may vary. However, this type of spar is not admissible on long vehicles such as commercial vehicles for which the rear overhang becomes important.
  • the present invention aims to overcome the above disadvantages of the prior art.
  • the invention provides a rear structural frame of a motor vehicle frame comprising a rectilinear profile, and two lateral flanges integral with the profile, each flange being fixed to a straight section in one or two parts depending the length of said rectilinear profile.
  • the flanges are fixed respectively one piece on the profile and thus form a reliable side at one of its ends to a bumper beam of the chassis structure and at its end opposite to a rear crossmember of the chassis structure, the vehicle thus obtained having a cantilever whose length is defined by the length of the flanges.
  • each flange is then cut into two parts to fix each of the two parts a flange on the profile, at the ends thereof to form a reliable spar at one of its ends to a bumper beam of the frame structure and at its end opposite a rear axle beam of the chassis structure.
  • the same flanges are used, either by being fixed in one part on the section or by being respectively cut into two parts then fixed on the section and this, for lengths of cantilever different vehicle.
  • each flange has an end portion that extends beyond one end of the profile and allows attachment to a rear cross member of the frame while an opposite end portion of the flange extends against the opposite end of the frame. profile.
  • each flange has a length L0, said flanges mounted in one part on a profile of length L1 forming a side member determining the minimum overhang, the shortest for this type of vehicle.
  • the flasks once cut into two parts are fixable to the ends of sections of different lengths L2, L3, etc., greater than L0, forming longitudinal members defining cantilever rear vehicle structure longer than the minimum overhang.
  • a spar according to the invention can have different lengths in a simple manner with the same parts by simple cutting operations of the rectilinear profile and flanges.
  • a rectilinear section comprises two side walls and a bottom wall connecting the two side walls and the two side plates are secured respectively to the two side walls of the rectilinear profile, the two side flanges comprising two flanges. folded towards each other and a part is supported under the bottom wall of the profile.
  • the spar comprises means for its connection to the suspension spring of the vehicle, said means being integral with the two folded edges of the two side flanges.
  • the spar thus consists of a part resulting from a profiling and cut to the desired length depending on the vehicle cantilever wanted while each flange is obtained by cutting and bending a plate, by example of steel sheet to form the flanges L0 length corresponding to the shortest cantilever length desired for the vehicle. These flanges are fixed by welding to a profile either in one part or in two parts if necessary.
  • the profile has a U-shaped cross section, the side flanges being secured to the legs of the U profile.
  • the longitudinal edges of the side walls of the profile comprise outer flanges, and each side flange comprises an outer flange, the outer flanges of the two side flanges being secured respectively under the longitudinal flanges of the side walls of the profile.
  • the spar comprises a device for its connection to a bumper beam of the chassis structure, fixing lugs for its connection to a rear cross member of the chassis structure, a device allowing its connection to a tailgating abutment, an attachment piece for its connection to a damper of the vehicle.
  • the two side plates have an end portion for overflow in the extension of one end of the profile, and the attachment piece through the protruding portion of the two side plates being secured two side flanges.
  • one of the flange portions comprises the projecting end portion and the lower flanges for connecting the means for its connection to the suspension spring of the vehicle.
  • the invention also relates to a rear frame structure of a vehicle comprising two side members, characterized in that each side member is as defined above.
  • each spar is secured to a rear cross member of the structure by fixing lugs, the other end of each spar being secured to a bumper beam of the structure by a corresponding connection device.
  • the structure comprises a reinforcing beam whose ends are integral with the two longitudinal members at each connecting means to the suspension spring of each side member.
  • the invention also relates to a vehicle, in particular an automobile, comprising a chassis structure as defined above.
  • FIG. 1 is a perspective view of a side member for a first rear frame structure of the vehicle according to the invention
  • FIG. 2 is a perspective view of a side member for a second rear vehicle frame structure according to the invention
  • - Figure 3 is an exploded perspective view of a spar according to the invention
  • FIG. 4 is a perspective view of a rear frame structure provided with a longitudinal member according to FIG. 1;
  • FIG. 5 is a perspective view of a side member of the rear frame structure of Figure 4.
  • FIG. 6 is a perspective view of a side member according to Figure 2 on the rear frame structure
  • FIG. 7 is a cross-sectional view of a longitudinal member along line III-III of FIG. 4. motor vehicles, particularly of the utility type, with reference to FIGS. 1 to 7.
  • a longitudinal member 1 comprises a straight section 3 and two side plates 8, 9 integral with the straight section 3.
  • Each flange 8, 9 has a length L0 defining with the profile 3 of length L1 as that shown in Figure 1, a shank 1 for a rear frame structure having a short or minimal overhang of the vehicle.
  • the profile 3 ' has a length L2 greater than L0 , and also to L1.
  • Each flange 8, 9 is then cut into two parts 8a, 8b and 9a, 9b fixed to the ends of the straight section 34 to define with this profile of length L2 greater than L0 and L1 a side member 1 'for a second rear frame structure having a longer vehicle overhang.
  • the spar 1 comprises a rectilinear profile 3 whose cross section has a U-shape.
  • This profile 3 thus comprises two side walls 4, 5 and a bottom wall 6 connecting the two. side walls 4 and 5.
  • the edges of the side walls 4, 5 comprise two external edges 7a and 7b forming a right angle with the side walls 4 and 5 of the profile 3.
  • the spar 1 also comprises the two lateral flanges 8 and 9 respectively integral, for example by welding, the side walls 4 and 5 of the profile rectiligne 3.
  • the two flanges 8, 9 also comprise two flanges folded towards each other, said lower flanges 11a and 11b, a portion of which 12a, 12b bears under the bottom wall 6 of the rectilinear profile 3, as shown in FIG. 3 and a portion of one 13a is superimposed on the portion 13b of the other securing the two flanges 8, 9.
  • Each lateral flange 8, 9 is obtained by folding a plate, for example sheet steel and has a length L0.
  • FIG. 4 represents a perspective view of a rear structure portion of this chassis, which comprises two longitudinal members 1 according to the invention, each being connected by its ends on the one hand to the rear axle cross member 18 by means of legs 14, and on the other hand to the bumper beam 17 by a connecting device 15.
  • Each rear spar 1 comprises a connecting means 2 of said spar 1 with a suspension spring of the vehicle.
  • a cross member 19 reinforces the frame structure in the vicinity of the connection between each side member 1 and a suspension spring, the forces being particularly important at this location.
  • the connecting means 2 of a spar to the suspension spring of the vehicle comprises a sheet metal plate 2a secured to the bottom wall of the spar, for example by welding, and a tubular part 2b integral with the plate of sheet 2a, the suspension spring being intended to be arranged around this tubular piece.
  • the connecting means 2 of the spar to the suspension spring also comprises a connecting device 2c of the spar to a tailgating abutment (not shown).
  • the means 2 allowing the connection of the spar 1 to the suspension spring is secured, for example by welding, the two lower flanges 11a, 11b of the two side flanges 8, 9.
  • the spar 1 has a reinforced structure in the vicinity of the connection between the spar 1 and the suspension spring.
  • each lateral flange 8, 9 comprises an outer rim said upper flange 10a, 10b, bent at right angles to the body of the side flange.
  • the outer flanges 10a, 10b of the two lateral flanges 8, 9 are secured respectively under the two longitudinal flanges 7a, 7b of the side walls 4, 5 of the profile 3, for example by welding.
  • the spar comprises flat parts 16 integral, for example by welding, the lower edges 11a, 11b side flanges 8, 9.
  • the side flanges are thus connected between they by their lower edges 11a, 11b, over their entire length. In this way, it avoids the spacing of the flanges 8, 9 during the deformation of the side members 1, for example caused by a sudden shock at the rear of the vehicle.
  • the spar 1 also comprises a fastening piece 13 for its connection to a damper of the vehicle.
  • This attachment piece 13 of tubular shape, is disposed near the rear cross member 18. [0041] So that the attachment piece 13 does not alter the stiffness characteristics of the side member 1, the two side flanges 8, 9 have an end portion which protrudes in the extension of one end of the profile 3: the attachment piece 13 passes only that portion projecting from the two lateral flanges 8, 9 and is integral with said lateral flanges 8, 9
  • each spar 1 may have a tubular cross-section, square or rectangular.
  • each spar according to the invention can be made by simple rolling and folding operations, using high-grade materials. It is also simpler to manufacture for lower costs by being made from simple definition components such as steel sheets.
  • the spar 1 according to the invention which supports the suspension interfaces and resists the rear shocks of the vehicle, is therefore thinner and lighter than a spar of the prior art obtained by stamping, for benefits of equivalent rigidities.
  • the lateral flanks 8, 9 have a length L0 so as to extend from one piece all along the section 3 of length L1, with an end portion overflowing said section 3 to allow the establishment of the attachment piece 13.
  • the profile 3 to a length L1 is cut a profile 3 'of length L2 greater than the length L1 and at the length L0 of the flanges 8, 9.
  • Each side flange 8, 9 is then cut into two parts, one 8a, 9a having the end portion to be in overflow of the profile 3 'to allow it to be connected to the rear crossbeam 18 by fixing lugs 14 and the other part 8b, 9b being positioned at the opposite end of the profile 3 'to allow its attachment to the bumper beam 17 by a connecting device 15.
  • the flange end portion 8a, 9a connected to the rear crossmember 18 also comprises the portion of the flanges 8, 9 on which the means 2 allowing the connection of the spar 1 to the suspension spring is secured by example by welding.
  • the cutting of the flanges 8, 9 is made along the line AA visible in Figure 1, so that the portion 8a, 9a connected to the rear cross member 18 has the overflow portion and the portion of the flanges 8 , 9 on which is connected the suspension spring and the crosspiece 19.
  • the section of the flanges 8, 9 is such that the end portion 8a, 9a substantially corresponds to 2/3 of L0 and the end portion 8b, 9b corresponds to about 1/3 of L0.

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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 longitudinal member (1, 1') for a rear structure of a motor vehicle chassis, comprising: - a straight profiled section (3, 3'); and - two lateral flanges (8, 9) secured to the profiled section (3, 3'), each flange (8, 9) being attached to a straight profiled section (3, 3') in one or two parts depending on the length of said straight profiled section (3, 3'). The invention applies to the automotive industry.

Description

LONGERONNET POUR UNE STRUCTURE ARRIÈRE DE CHÂSSIS DE VÉHICULE ET VÉHICULE COMPRENANT UNE TELLE STRUCTURE  LONGERONNET FOR A REAR STRUCTURE OF VEHICLE CHASSIS AND VEHICLE COMPRISING SUCH A STRUCTURE
[0001] L'invention concerne un longeronnet pour une structure arrière de châssis de véhicule. Elle vise également une structure arrière de châssis de véhicule équipée de deux longeronnets, ainsi qu'un véhicule comprenant une telle structure arrière. The invention relates to a side member for a rear frame structure of the vehicle. It also relates to a vehicle chassis rear structure equipped with two longitudinal members, and a vehicle comprising such a rear structure.
[0002] Les longeronnets d'une structure arrière de châssis d'un véhicule, notamment automobile, sont bien connus pour rigidifier la structure de châssis et assurer la liaison notamment de la suspension arrière au châssis. D'autre part ces longeronnets, destinés à être reliés à la poutre de pare-chocs du véhicule, sont conçus pour se déformer en cas de choc brutal, de manière à absorber l'énergie cinétique du choc. Ces longeronnets sont obtenus par des procédés d'emboutissage, qui ne permettent pas d'utiliser des matériaux aux nuances très élevées. Il en résulte l'obtention de pièces lourdes, aux formes complexes, souvent difficiles à installer sur la structure arrière de châssis. The longitudinal members of a rear frame structure of a vehicle, in particular a vehicle, are well known to stiffen the chassis structure and ensure the connection including the rear suspension to the chassis. On the other hand these side rails, intended to be connected to the bumper beam of the vehicle, are designed to deform in case of sudden shock, so as to absorb the kinetic energy of the shock. These struts are obtained by stamping processes, which do not allow the use of materials with very high shades. This results in obtaining heavy parts, complex shapes, often difficult to install on the rear frame structure.
[0003] Actuellement, les constructeurs automobiles cherchent à standardiser un maximum de pièces constituant le véhicule ; ainsi ils cherchent à utiliser plusieurs fois une même pièce même pour des véhicules pouvant posséder des silhouettes différentes. Currently, car manufacturers seek to standardize a maximum of parts constituting the vehicle; thus they seek to use several times the same room even for vehicles that can have different silhouettes.
[0004] Toutefois, selon la silhouette du véhicule considéré, par exemple, selon la longueur du plancher de charge ; la structure du véhicule doit être à chaque fois adaptée afin d'assurer la faisabilité du véhicule, les longeronnets doivent alors, pour chaque type de véhicule, faire l'objet d'un développement spécifique afin que leur longueur soit adaptée à la longueur du plancher de charge. However, depending on the silhouette of the vehicle, for example, depending on the length of the load floor; the structure of the vehicle must be adapted each time to ensure the feasibility of the vehicle, then the side rails must, for each type of vehicle, be the object of a specific development so that their length is adapted to the length of the floor charge.
[0005] La fabrication de chaque nouveau longeronnet est coûteuse, puisqu'elle entraîne notamment le développement d'un nouvel outillage et multiplie le nombre de pièces à gérer en usine. [0006] On a proposé dans FR 2 956 369 de réaliser un longeronnet constitué de deux pièces tels que des corps creux constitués chacun d'un profilé intérieur et extérieur, s'étendant dans le prolongement l'un de l'autre en présentant une zone de recouvrement et permettant ainsi une adaptation à la longueur de la silhouette du véhicule, la zone de recouvrement pouvant varier. Toutefois, ce type de longeronnet n'est pas admissible sur des véhicules de grandes longueurs comme les véhicules utilitaires pour lesquels le porte- à-faux arrière devient important. The manufacture of each new spar is expensive, since it involves in particular the development of new tools and multiplies the number of parts to be managed in the factory. It has been proposed in FR 2 956 369 to produce a spar consisting of two parts such as hollow bodies each consisting of an inner and outer profile, extending in the extension of one another by having a covering area and thus allowing adaptation to the length of the silhouette of the vehicle, the recovery area may vary. However, this type of spar is not admissible on long vehicles such as commercial vehicles for which the rear overhang becomes important.
[0007] La présente invention a pour but de pallier les inconvénients ci-dessus de l'art antérieur. [0008] Pour atteindre ce but, l'invention propose un longeronnet de structure arrière de châssis de véhicule automobile comprenant un profilé rectiligne, et deux flasques latéraux solidaires du profilé, chaque flasque étant fixé sur un profilé rectiligne en une ou deux parties en fonction de la longueur dudit profilé rectiligne. The present invention aims to overcome the above disadvantages of the prior art. To achieve this object, the invention provides a rear structural frame of a motor vehicle frame comprising a rectilinear profile, and two lateral flanges integral with the profile, each flange being fixed to a straight section in one or two parts depending the length of said rectilinear profile.
[0009] Ainsi de manière avantageuse, si la longueur du profilé rectiligne et celle des flasques sont en correspondance, les flasques sont fixés respectivement d'une pièce sur le profilé et on forme ainsi un longeronnet reliable à l'une de ses extrémités à une poutre de pare-chocs de la structure de châssis et à son extrémité opposée à une traverse de train arrière de la structure de châssis, le véhicule ainsi obtenu présentant un porte-à-faux dont la longueur est définie par la longueur des flasques. [0010] Pour proposer des véhicules présentant un porte-à-faux plus long, on utilise un profilé rectiligne de la longueur souhaitée, généralement supérieure à la longueur des flasques, et chaque flasque est alors découpé en deux parties pour fixer chacune des deux parties d'un flasque sur le profilé, aux extrémités de celui-ci pour former un longeronnet reliable à l'une de ses extrémités à une poutre de pare-chocs de la structure de châssis et à son extrémité opposée à une traverse de train arrière de la structure de châssis. Thus advantageously, if the length of the rectilinear profile and that of the flanges are in correspondence, the flanges are fixed respectively one piece on the profile and thus form a reliable side at one of its ends to a bumper beam of the chassis structure and at its end opposite to a rear crossmember of the chassis structure, the vehicle thus obtained having a cantilever whose length is defined by the length of the flanges. To provide vehicles with a longer cantilever, using a straight section of the desired length, generally greater than the length of the flanges, and each flange is then cut into two parts to fix each of the two parts a flange on the profile, at the ends thereof to form a reliable spar at one of its ends to a bumper beam of the frame structure and at its end opposite a rear axle beam of the chassis structure.
[0011] Ainsi, de manière avantageuse, les mêmes flasques sont utilisés, soit en étant fixés en une partie sur le profilé soit en étant découpés respectivement en deux parties fixées ensuite sur le profilé et ce, pour des longueurs de porte-à-faux du véhicule différentes. Thus, advantageously, the same flanges are used, either by being fixed in one part on the section or by being respectively cut into two parts then fixed on the section and this, for lengths of cantilever different vehicle.
[0012] Avantageusement, chaque flasque présente une partie d'extrémité qui déborde à une extrémité du profilé et permet la fixation à une traverse arrière du châssis tandis qu'une partie d'extrémité opposée du flasque s'étend contre l'extrémité opposée du profilé. Advantageously, each flange has an end portion that extends beyond one end of the profile and allows attachment to a rear cross member of the frame while an opposite end portion of the flange extends against the opposite end of the frame. profile.
[0013] De préférence chaque flasque présente une longueur L0, lesdits flasques montés en une partie sur un profilé de longueur L1 formant un longeronnet déterminant le porte-à- faux minimal, le plus court pour ce type de véhicule. Les flasques une fois découpés en deux parties sont fixables aux extrémités de profilés de différentes longueurs L2, L3, etc, supérieures à L0, formant des longeronnets déterminant des porte-à-faux de structure arrière de véhicule de longueur supérieure au porte-à-faux minimal. Preferably each flange has a length L0, said flanges mounted in one part on a profile of length L1 forming a side member determining the minimum overhang, the shortest for this type of vehicle. The flasks once cut into two parts are fixable to the ends of sections of different lengths L2, L3, etc., greater than L0, forming longitudinal members defining cantilever rear vehicle structure longer than the minimum overhang.
[0014] Ainsi de manière avantageuse, un longeronnet selon l'invention peut présenter des longueurs différentes de manière simple avec les mêmes pièces par de simples opérations de découpe du profilé rectiligne et des flasques. Thus advantageously, a spar according to the invention can have different lengths in a simple manner with the same parts by simple cutting operations of the rectilinear profile and flanges.
[0015] Selon un mode de réalisation préféré, un profilé rectiligne comporte deux parois latérales et une paroi de fond reliant les deux parois latérales et les deux flasques latéraux sont solidaires respectivement des deux parois latérales du profilé rectiligne, les deux flasques latéraux comprenant deux rebords repliés l'un vers l'autre et dont une partie est en appui sous la paroi de fond du profilé. According to a preferred embodiment, a rectilinear section comprises two side walls and a bottom wall connecting the two side walls and the two side plates are secured respectively to the two side walls of the rectilinear profile, the two side flanges comprising two flanges. folded towards each other and a part is supported under the bottom wall of the profile.
[0016] Avantageusement, le longeronnet comprend un moyen permettant sa liaison au ressort de suspension du véhicule, ledit moyen étant solidaire des deux rebords repliés des deux flasques latéraux. [0017] Le longeronnet est ainsi constitué d'une pièce résultant d'un profilage et coupée à la longueur souhaitée en fonction du porte-à-faux de véhicule voulu tandis que chaque flasque est obtenu par découpe et pliage d'une plaque, par exemple de tôle d'acier pour former les flasques de la longueur L0 correspondant à la longueur de porte-à-faux la plus courte souhaitée pour le véhicule. Ces flasques sont fixés par soudage à un profilé soit en une partie, soit en deux parties le cas échéant. Advantageously, the spar comprises means for its connection to the suspension spring of the vehicle, said means being integral with the two folded edges of the two side flanges. The spar thus consists of a part resulting from a profiling and cut to the desired length depending on the vehicle cantilever wanted while each flange is obtained by cutting and bending a plate, by example of steel sheet to form the flanges L0 length corresponding to the shortest cantilever length desired for the vehicle. These flanges are fixed by welding to a profile either in one part or in two parts if necessary.
[0018] Selon une caractéristique de l'invention, le profilé a une section transversale en forme de U, les flasques latéraux étant solidaires des jambes du U du profilé. According to a feature of the invention, the profile has a U-shaped cross section, the side flanges being secured to the legs of the U profile.
[0019] Selon une autre caractéristique, les bords longitudinaux des parois latérales du profilé comportent des rebords externes, et chaque flasque latéral comprend un rebord externe, les rebords externes des deux flasques latéraux étant solidaires respectivement sous les rebords longitudinaux des parois latérales du profilé. According to another feature, the longitudinal edges of the side walls of the profile comprise outer flanges, and each side flange comprises an outer flange, the outer flanges of the two side flanges being secured respectively under the longitudinal flanges of the side walls of the profile.
[0020] Selon une autre caractéristique, le longeronnet comprend un dispositif permettant sa liaison à une poutre de pare-chocs de la structure de châssis, des pattes de fixation permettant sa liaison à une traverse de train arrière de la structure de châssis, un dispositif permettant sa liaison à une butée de talonnage, une pièce d'accrochage permettant sa liaison à un amortisseur du véhicule. [0021] Selon une autre caractéristique, les deux flasques latéraux présentent une partie d'extrémité destinée à déborder dans le prolongement de l'une des extrémités du profilé, et la pièce d'accrochage traverse la partie débordante des deux flasques latéraux en étant solidaire des deux flasques latéraux. [0022] Ainsi, lorsque les flasques sont fixés en deux parties, l'une des parties de flasques comprend la partie d'extrémité débordante ainsi que les rebords inférieurs permettant la liaison du moyen permettant sa liaison au ressort de suspension du véhicule. According to another characteristic, the spar comprises a device for its connection to a bumper beam of the chassis structure, fixing lugs for its connection to a rear cross member of the chassis structure, a device allowing its connection to a tailgating abutment, an attachment piece for its connection to a damper of the vehicle. According to another characteristic, the two side plates have an end portion for overflow in the extension of one end of the profile, and the attachment piece through the protruding portion of the two side plates being secured two side flanges. Thus, when the flanges are fixed in two parts, one of the flange portions comprises the projecting end portion and the lower flanges for connecting the means for its connection to the suspension spring of the vehicle.
[0023] Cette partie d'extrémité des flasques est fixée à une extrémité du profilé et la partie d'extrémité opposée des flasques est fixée à l'extrémité opposée du profilé. [0024] L'invention concerne également une structure arrière de châssis d'un véhicule comprenant deux longeronnets, caractérisé en ce que chaque longeronnet est tel que défini précédemment. This end portion of the flanges is attached to one end of the profile and the opposite end portion of the flanges is attached to the opposite end of the profile. The invention also relates to a rear frame structure of a vehicle comprising two side members, characterized in that each side member is as defined above.
[0025] Selon une autre caractéristique, une extrémité de chaque longeronnet est solidarisée à une traverse de train arrière de la structure par des pattes de fixation, l'autre extrémité de chaque longeronnet étant solidarisée à une poutre de pare-chocs de la structure par un dispositif de liaison correspondant. According to another feature, one end of each spar is secured to a rear cross member of the structure by fixing lugs, the other end of each spar being secured to a bumper beam of the structure by a corresponding connection device.
[0026] Selon une autre caractéristique, la structure comprend une traverse de renfort dont les extrémités sont solidaires des deux longeronnets au niveau de chaque moyen de liaison au ressort de suspension de chaque longeronnet. [0027] L'invention concerne également un véhicule, notamment automobile, comprenant une structure de châssis telle que définie précédemment. According to another feature, the structure comprises a reinforcing beam whose ends are integral with the two longitudinal members at each connecting means to the suspension spring of each side member. The invention also relates to a vehicle, in particular an automobile, comprising a chassis structure as defined above.
[0028] L'invention sera mieux comprise, et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement dans la description explicative qui va suivre faite en référence aux dessins annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels : The invention will be better understood, and other objects, features, details and advantages thereof will appear more clearly in the explanatory description which follows with reference to the accompanying drawings given solely by way of example illustrating a embodiment of the invention and in which:
- La figure 1 est une vue en perspective d'un longeronnet pour une première structure arrière de châssis de véhicule selon l'invention ; - Figure 1 is a perspective view of a side member for a first rear frame structure of the vehicle according to the invention;
- la figure 2 est une vue en perspective d'un longeronnet pour une deuxième structure arrière de châssis de véhicule selon l'invention ; - la figure 3 est une vue éclatée en perspective d'un longeronnet selon l'invention ; - Figure 2 is a perspective view of a side member for a second rear vehicle frame structure according to the invention; - Figure 3 is an exploded perspective view of a spar according to the invention;
- la figure 4 est une vue en perspective de structure arrière de châssis pourvue d'un longeronnet selon la figure 1 ; FIG. 4 is a perspective view of a rear frame structure provided with a longitudinal member according to FIG. 1;
- la figure 5 est une vue en perspective d'un longeronnet de la structure arrière de châssis de la figure 4 ; - Figure 5 is a perspective view of a side member of the rear frame structure of Figure 4;
- La figure 6 est une vue en perspective d'un longeronnet selon la figure 2 sur structure arrière de châssis ; - Figure 6 is a perspective view of a side member according to Figure 2 on the rear frame structure;
- la figure 7 est une vue en coupe transversale d'un longeronnet selon la ligne lll-lll de la figure 4. [0029] On décrit ci-après, à titre d'exemple non limitatif, une application de l'invention à des véhicules automobiles notamment du type utilitaire, en se référant aux figures 1 à 7. FIG. 7 is a cross-sectional view of a longitudinal member along line III-III of FIG. 4. motor vehicles, particularly of the utility type, with reference to FIGS. 1 to 7.
[0030] Comme représenté à la figure 1, un longeronnet 1 comprend un profilé rectiligne 3 et deux flasques latéraux 8, 9 solidaires du profilé rectiligne 3. Chaque flasque 8, 9 présente une longueur L0 définissant avec le profilé 3 de longueur L1 comme celui représenté à la figure 1 , un longeronnet 1 pour une structure arrière de châssis présentant un porte-à-faux court ou minimal du véhicule. As shown in Figure 1, a longitudinal member 1 comprises a straight section 3 and two side plates 8, 9 integral with the straight section 3. Each flange 8, 9 has a length L0 defining with the profile 3 of length L1 as that shown in Figure 1, a shank 1 for a rear frame structure having a short or minimal overhang of the vehicle.
[0031] Comme visible à la figure 2, lorsque la structure arrière du châssis présente un porte-à-faux long, c'est-à-dire plus long que celui dit court, le profilé 3' présente une longueur L2 supérieure à L0, et également à L1. Chaque flasque 8, 9 est alors découpé en deux parties 8a, 8b et 9a, 9b fixées aux extrémités du profilé rectiligne 34 pour définir avec ce profilé de longueur L2 supérieure à L0 et L1 un longeronnet l' pour une deuxième structure arrière de châssis présentant un porte-à-faux de véhicule plus long. As shown in Figure 2, when the rear structure of the frame has a long cantilever, that is to say longer than said short, the profile 3 'has a length L2 greater than L0 , and also to L1. Each flange 8, 9 is then cut into two parts 8a, 8b and 9a, 9b fixed to the ends of the straight section 34 to define with this profile of length L2 greater than L0 and L1 a side member 1 'for a second rear frame structure having a longer vehicle overhang.
[0032] Comme cela est visible à la figure 3, le longeronnet 1 comprend un profilé rectiligne 3 dont la section transversale a une forme de U. Ce profilé 3 comprend ainsi deux parois latérales 4, 5 et une paroi de fond 6 reliant les deux parois latérales 4 et 5. D'autre part, les bords des parois latérales 4, 5 comprennent deux rebords externes 7a et 7b formant un angle droit avec les parois latérales 4 et 5 du profilé 3. As shown in Figure 3, the spar 1 comprises a rectilinear profile 3 whose cross section has a U-shape. This profile 3 thus comprises two side walls 4, 5 and a bottom wall 6 connecting the two. side walls 4 and 5. On the other hand, the edges of the side walls 4, 5 comprise two external edges 7a and 7b forming a right angle with the side walls 4 and 5 of the profile 3.
[0033] Le longeronnet 1 comprend également les deux flasques latéraux 8 et 9 respectivement solidaires, par exemple par soudure, des parois latérales 4 et 5 du profilé rectiligne 3. Les deux flasques 8, 9 comprennent également deux rebords repliés l'un vers l'autre, dits rebords inférieurs 11a et 11 b, dont une partie 12a, 12b est en appui sous la paroi de fond 6 du profilé rectiligne 3, comme représenté sur la figure 3 et une partie de l'un 13a est superposée sur la partie 13b de l'autre solidarisant les deux flasques 8, 9. Chaque flasque latéral 8, 9 est obtenu par pliage d'une plaque, par exemple de tôle d'acier et présente une longueur L0. The spar 1 also comprises the two lateral flanges 8 and 9 respectively integral, for example by welding, the side walls 4 and 5 of the profile rectiligne 3. The two flanges 8, 9 also comprise two flanges folded towards each other, said lower flanges 11a and 11b, a portion of which 12a, 12b bears under the bottom wall 6 of the rectilinear profile 3, as shown in FIG. 3 and a portion of one 13a is superimposed on the portion 13b of the other securing the two flanges 8, 9. Each lateral flange 8, 9 is obtained by folding a plate, for example sheet steel and has a length L0.
[0034] Le véhicule comprend une caisse formée d'une carrosserie solidarisée à un châssis. La figure 4 représente une vue en perspective d'une partie de structure arrière de ce châssis, qui comprend deux longeronnets 1 selon l'invention, chacun étant relié par ses extrémités d'une part à la traverse de train arrière 18 par des pattes de fixation 14, et d'autre part à la poutre de pare-chocs 17 par un dispositif de liaison 15. The vehicle comprises a body formed of a body secured to a frame. FIG. 4 represents a perspective view of a rear structure portion of this chassis, which comprises two longitudinal members 1 according to the invention, each being connected by its ends on the one hand to the rear axle cross member 18 by means of legs 14, and on the other hand to the bumper beam 17 by a connecting device 15.
[0035] Chaque longeronnet arrière 1 comprend un moyen de liaison 2 dudit longeronnet 1 avec un ressort de suspension du véhicule. Une traverse 19 permet de renforcer la structure de châssis au voisinage de la liaison entre chaque longeronnet 1 et un ressort de suspension, les efforts étant particulièrement importants à cet endroit. Each rear spar 1 comprises a connecting means 2 of said spar 1 with a suspension spring of the vehicle. A cross member 19 reinforces the frame structure in the vicinity of the connection between each side member 1 and a suspension spring, the forces being particularly important at this location.
[0036] Le moyen de liaison 2 d'un longeronnet au ressort de suspension du véhicule comprend une plaque de tôle 2a solidaire de la paroi de fond du longeronnet, par exemple par soudure, ainsi qu'une pièce tubulaire 2b solidaire de la plaque de tôle 2a, le ressort de suspension étant destiné à être disposé autour de cette pièce tubulaire. Le moyen de liaison 2 du longeronnet au ressort de suspension comprend également un dispositif de liaison 2c du longeronnet à une butée de talonnage (non représentée). The connecting means 2 of a spar to the suspension spring of the vehicle comprises a sheet metal plate 2a secured to the bottom wall of the spar, for example by welding, and a tubular part 2b integral with the plate of sheet 2a, the suspension spring being intended to be arranged around this tubular piece. The connecting means 2 of the spar to the suspension spring also comprises a connecting device 2c of the spar to a tailgating abutment (not shown).
[0037] Le moyen 2 permettant la liaison du longeronnet 1 au ressort de suspension est solidaire, par exemple par soudure, des deux rebords inférieurs 11a, 11b des deux flasques latéraux 8, 9. De la sorte, le longeronnet 1 présente une structure renforcée au voisinage de la liaison entre le longeronnet 1 et le ressort de suspension. The means 2 allowing the connection of the spar 1 to the suspension spring is secured, for example by welding, the two lower flanges 11a, 11b of the two side flanges 8, 9. In this way, the spar 1 has a reinforced structure in the vicinity of the connection between the spar 1 and the suspension spring.
[0038] De préférence, chaque flasque latéral 8, 9 comprend un rebord externe dit rebord supérieur 10a, 10b, replié à angle droit par rapport au corps du flasque latéral. Les rebords externes 10a, 10b des deux flasques latéraux 8, 9 sont solidaires respectivement sous les deux rebords longitudinaux 7a, 7b des parois latérales 4, 5 du profilé 3, par exemple par soudage. [0039] En plus des différents moyens et dispositifs de liaison décrits précédemment, le longeronnet comprend des pièces planes 16 solidaires, par exemple par soudure, des bords inférieurs 11a, 11 b des flasques latéraux 8, 9. Les flasques latéraux sont ainsi reliés entre eux par leurs rebords inférieurs 11a, 11b, sur toute leur longueur. De la sorte, on évite l'écartement des flasques 8, 9 lors de la déformation des longeronnets 1 , par exemple occasionnée par un choc brutal à l'arrière du véhicule. Preferably, each lateral flange 8, 9 comprises an outer rim said upper flange 10a, 10b, bent at right angles to the body of the side flange. The outer flanges 10a, 10b of the two lateral flanges 8, 9 are secured respectively under the two longitudinal flanges 7a, 7b of the side walls 4, 5 of the profile 3, for example by welding. In addition to the various means and connection devices described above, the spar comprises flat parts 16 integral, for example by welding, the lower edges 11a, 11b side flanges 8, 9. The side flanges are thus connected between they by their lower edges 11a, 11b, over their entire length. In this way, it avoids the spacing of the flanges 8, 9 during the deformation of the side members 1, for example caused by a sudden shock at the rear of the vehicle.
[0040] Le longeronnet 1 comprend également une pièce d'accrochage 13 permettant sa liaison à un amortisseur du véhicule. Cette pièce d'accrochage 13, de forme tubulaire, est disposée à proximité de la traverse de train arrière 18. [0041] Pour que la pièce d'accrochage 13 n'altère pas les caractéristiques de rigidité du longeronnet 1 , les deux flasques latéraux 8, 9 ont une partie d'extrémité qui déborde dans le prolongement d'une extrémité du profilé 3 : la pièce d'accrochage 13 ne traverse que cette partie débordante des deux flasques latéraux 8, 9 et est solidaire desdits flasques latéraux 8, 9. [0042] Selon une variante de réalisation non représentée, chaque longeronnet 1 peut présenter une section transversale de forme tubulaire, carrée ou rectangulaire. The spar 1 also comprises a fastening piece 13 for its connection to a damper of the vehicle. This attachment piece 13, of tubular shape, is disposed near the rear cross member 18. [0041] So that the attachment piece 13 does not alter the stiffness characteristics of the side member 1, the two side flanges 8, 9 have an end portion which protrudes in the extension of one end of the profile 3: the attachment piece 13 passes only that portion projecting from the two lateral flanges 8, 9 and is integral with said lateral flanges 8, 9 According to an alternative embodiment not shown, each spar 1 may have a tubular cross-section, square or rectangular.
[0043] Les différents points de liaison entre chaque longeronnet 1 et le châssis du véhicule sont, par conception, positionnés à des hauteurs différentes. Pour ces raisons, le bord inférieur de chaque flasque 8, 9 présente la forme d'une ligne brisée c'est-à-dire non rectiligne, tandis que le profilé 3 du longeronnet 1 , comme précisé au-dessus, est rectiligne. De la sorte, chaque longeronnet selon l'invention peut être réalisé par de simples opérations de laminage et de pliage, en utilisant des matériaux aux nuances élevées. Il est également plus simple à fabriquer pour des coûts moins élevés, en étant réalisé à partir de composants de définition simple comme des tôles d'acier. Le longeronnet 1 selon l'invention, qui supporte les interfaces de suspension et résiste aux chocs arrières du véhicule, est donc plus fin et plus léger qu'un longeronnet de l'art antérieur obtenu par emboutissage, pour des prestations de rigidités équivalentes. The different connection points between each side member 1 and the vehicle frame are, by design, positioned at different heights. For these reasons, the lower edge of each flange 8, 9 has the form of a broken line that is to say non-rectilinear, while the profile 3 of the side member 1, as specified above, is rectilinear. In this way, each spar according to the invention can be made by simple rolling and folding operations, using high-grade materials. It is also simpler to manufacture for lower costs by being made from simple definition components such as steel sheets. The spar 1 according to the invention, which supports the suspension interfaces and resists the rear shocks of the vehicle, is therefore thinner and lighter than a spar of the prior art obtained by stamping, for benefits of equivalent rigidities.
[0044] Comme on peut le voir sur les figures, les flancs latéraux 8, 9 présentent une longueur L0 de sorte à s'étendre d'une pièce tout le long du profilé 3 de longueur L1 , avec une partie d'extrémité débordant dudit profilé 3 pour permettre la mise en place de la pièce d'accrochage 13. [0045] Lorsqu'on souhaite proposer un véhicule dont le porte-à-faux est plus long que celui défini avec le longeronnet 1 dont le profilé 3 à une longueur L1 , on découpe un profilé 3' de longueur L2 supérieure à la longueur L1 et à la longueur L0 des flasques 8, 9. As can be seen in the figures, the lateral flanks 8, 9 have a length L0 so as to extend from one piece all along the section 3 of length L1, with an end portion overflowing said section 3 to allow the establishment of the attachment piece 13. When it is desired to propose a vehicle whose cantilever is longer than that defined with the spar 1, the profile 3 to a length L1, is cut a profile 3 'of length L2 greater than the length L1 and at the length L0 of the flanges 8, 9.
[0046] Chaque flasque latéral 8, 9 est alors coupé en deux parties, l'une 8a, 9a comportant la partie d'extrémité devant se trouver en débord du profilé 3' pour lui permettre d'être relié à la traverse de train arrière 18 par des pattes de fixation 14 et l'autre partie 8b, 9b se positionnant à l'extrémité opposée du profilé 3' pour permettre sa fixation à la poutre de pare-chocs 17 par un dispositif de liaison 15. Each side flange 8, 9 is then cut into two parts, one 8a, 9a having the end portion to be in overflow of the profile 3 'to allow it to be connected to the rear crossbeam 18 by fixing lugs 14 and the other part 8b, 9b being positioned at the opposite end of the profile 3 'to allow its attachment to the bumper beam 17 by a connecting device 15.
[0047] De préférence, la partie d'extrémité de flasque 8a, 9a reliée à la traverse arrière 18 comprend également la partie des flasques 8, 9 sur laquelle le moyen 2 permettant la liaison du longeronnet 1 au ressort de suspension est solidaire, par exemple par soudure. Preferably, the flange end portion 8a, 9a connected to the rear crossmember 18 also comprises the portion of the flanges 8, 9 on which the means 2 allowing the connection of the spar 1 to the suspension spring is secured by example by welding.
[0048] De préférence, la découpe des flasques 8, 9 se fait selon la ligne A-A visible à la figure 1 , de sorte que la partie 8a, 9a reliée à la traverse arrière 18 comporte la partie en débord et la partie des flasques 8, 9 sur laquelle est reliée le ressort de suspension et la traverse 19. La coupe des flasques 8, 9 est telle que la partie d'extrémité 8a, 9a correspond sensiblement à 2/3 de L0 et la partie d'extrémité 8b, 9b correspond environ à 1/3 de L0. Preferably, the cutting of the flanges 8, 9 is made along the line AA visible in Figure 1, so that the portion 8a, 9a connected to the rear cross member 18 has the overflow portion and the portion of the flanges 8 , 9 on which is connected the suspension spring and the crosspiece 19. The section of the flanges 8, 9 is such that the end portion 8a, 9a substantially corresponds to 2/3 of L0 and the end portion 8b, 9b corresponds to about 1/3 of L0.

Claims

REVENDICATIONS
1 . Longeronnet (1 , 1 ') de structure arrière de châssis de véhicule automobile comprenant1. Motor vehicle frame rear sill (1, 1 ') comprising
- un profilé rectiligne (3, 3'), et a rectilinear profile (3, 3 '), and
- deux flasques latéraux (8, 9) solidaires du profilé (3, 3'), chaque flasque (8, 9) étant fixé sur un profilé rectiligne (3, 3') en une ou deux parties en fonction de la longueur dudit profilé rectiligne (3, 3').  two lateral flanges (8, 9) integral with the profile (3, 3 '), each flange (8, 9) being fixed on a rectilinear profile (3, 3') in one or two parts depending on the length of said profile rectilinear (3, 3 ').
2. Longeronnet (1 , 1 ') selon la revendication 1 , caractérisé en ce que chaque flasque (8, 9) présente une partie d'extrémité (8a, 9a) qui déborde à une extrémité du profilé (3, 3'), permet la fixation à une traverse arrière du châssis et une partie d'extrémité opposée (8b, 9b) s'étendant contre l'extrémité opposée du profilé (3, 3'). 2. Longeronnet (1, 1 ') according to claim 1, characterized in that each flange (8, 9) has an end portion (8a, 9a) which projects at one end of the profile (3, 3'), allows attachment to a rear crossmember of the frame and an opposite end portion (8b, 9b) extending against the opposite end of the profile (3, 3 ').
3. Longeronnet (1 , 1 ') selon l'une des revendications 1 à 2, caractérisé en ce qu'il comprend un moyen (2) permettant sa liaison au ressort de suspension du véhicule, solidaire des flasques latéraux (8, 9). 3. Longeronnet (1, 1 ') according to one of claims 1 to 2, characterized in that it comprises a means (2) for its connection to the suspension spring of the vehicle, integral with the side flanges (8, 9). .
4. Longeronnet (1 , 1 ') selon l'une des revendications 1 à 3, caractérisé en ce que, lorsque les flasques (8, 9) sont fixés en deux parties, l'une des parties de flasques comprend la partie d'extrémité débordante (8a, 9a). 4. Longeronnet (1, 1 ') according to one of claims 1 to 3, characterized in that, when the flanges (8, 9) are fixed in two parts, one of the flange portions comprises the part d' overflowing end (8a, 9a).
5. Longeronnet (1 , 1 ') selon la revendication 4, caractérisé en ce que la partie de flasque comprenant la partie d'extrémité débordante (8a, 9a) comprend également la zone des flasques (8, 9) permettant la liaison du moyen permettant sa liaison au ressort de suspension du véhicule. 5. Longeronnet (1, 1 ') according to claim 4, characterized in that the flange portion comprising the projecting end portion (8a, 9a) also comprises the area of the flanges (8, 9) for connecting the means allowing its connection to the suspension spring of the vehicle.
6. Longeronnet (1 , 1 ') selon l'une des revendications 1 à 5, caractérisé en ce que le profilé (3) a une section transversale en forme de U, les flasques latéraux (8, 9) étant solidaires des jambes (4, 5) du U du profilé. 6. Longeronnet (1, 1 ') according to one of claims 1 to 5, characterized in that the profile (3) has a U-shaped cross section, the side flanges (8, 9) being integral with the legs ( 4, 5) of the U of the profile.
7. Longeronnet (1 , 1 ') selon la revendication 6, caractérisé en ce que les bords longitudinaux des parois latérales (4, 5) du profilé comportent des rebords externes7. Longeronnet (1, 1 ') according to claim 6, characterized in that the longitudinal edges of the side walls (4, 5) of the profile comprise external flanges.
(7a, 7b), et en ce que chaque flasque latéral (8, 9) comprend un rebord externe (10a, 10b), les rebords externes (10a, 10b) des deux flasques latéraux étant solidaires respectivement sous les rebords longitudinaux (7a, 7b) des parois latérales (4, 5) du profilé. (7a, 7b), and in that each lateral flange (8, 9) comprises an external flange (10a, 10b), the external flanges (10a, 10b) of the two lateral flanges being integral respectively under the longitudinal flanges (7a, 7b) side walls (4, 5) of the profile.
8. Longeronnet (1 , l') selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend un dispositif (15) permettant sa liaison à une poutre de pare-chocs (17) de la structure de châssis, des pattes de fixation (14) permettant sa liaison à une traverse de train arrière (18) de la structure de châssis, un dispositif (2c) permettant sa liaison à une butée de talonnage, une pièce d'accrochage (13) permettant sa liaison à un amortisseur du véhicule. 8. Longeronnet (1, l ') according to any one of claims 1 to 7, characterized in that it comprises a device (15) for its connection to a bumper beam (17) of the frame structure , fastening lugs (14) enabling it to be connected to a rear crossmember (18) of the chassis structure, a device (2c) enabling it to be connected to a tailgating abutment, a fastening piece (13) allowing it to be connection to a shock absorber of the vehicle.
9. Longeronnet (1 , l') selon la revendication 8, caractérisé en ce que les deux flasques latéraux (8, 9) ont une partie (8a, 9a) qui déborde dans le prolongement de l'une des extrémités du profilé (3), et en ce que la pièce d'accrochage (13) traverse la partie débordante des deux flasques latéraux (8, 9) en étant solidaire des deux flasques latéraux (8, 9). 9. Longeronnet (1, l ') according to claim 8, characterized in that the two side flanges (8, 9) have a portion (8a, 9a) which protrudes in the extension of one of the ends of the profile (3 ), and in that the attachment piece (13) passes through the protruding part of the two lateral flanges (8, 9) being integral with the two side plates (8, 9).
10. Structure arrière de châssis d'un véhicule comprenant deux longeronnets (1 , l'), caractérisée en ce que chaque longeronnet (1 , l') est conforme à l'une quelconque des revendications 1 à 9. 10. Rear frame structure of a vehicle comprising two longitudinal members (1, l '), characterized in that each side member (1, l') is according to any one of claims 1 to 9.
1 1. Structure arrière de châssis d'un véhicule comprenant deux longeronnets (1 , l'), selon la revendication 10, caractérisée en ce que les longeronnets sont constitués de flasques de longueur L0 fixés respectivement en une partie sur un profilé rectiligne de longueur L1. 1. A rear frame structure of a vehicle comprising two longitudinal members (1, I ') according to claim 10, characterized in that the longitudinal members consist of flanges L0 length respectively fixed in one part on a straight section of length L1.
12. Structure arrière de châssis d'un véhicule comprenant deux longeronnets (1 , l'), selon la revendication 10, caractérisée en ce que les longeronnets (1') sont constitués de profilés de longueur L2, supérieure à L0, sur lesquels les flasques (8, 9) sont fixés respectivement en deux parties. 12. Rear frame structure of a vehicle comprising two longitudinal members (1, I ') according to claim 10, characterized in that the longitudinal members (1') consist of sections of length L2, greater than L0, on which the flanges (8, 9) are respectively fixed in two parts.
13. Structure arrière de châssis d'un véhicule selon la revendication 10, caractérisée en ce qu'une extrémité de chaque longeronnet (1) est solidarisée à une traverse de train arrière (18) de la structure par des pattes de fixation (14), l'autre extrémité de chaque longeronnet étant solidarisée à une poutre de pare-chocs (17) de la structure par un dispositif de liaison (15) correspondant. 13. Rear frame structure of a vehicle according to claim 10, characterized in that one end of each spar (1) is secured to a rear crossmember (18) of the structure by fixing lugs (14). , the other end of each side member being secured to a bumper beam (17) of the structure by a corresponding connecting device (15).
14. Structure arrière de châssis d'un véhicule selon la revendication 11 , caractérisée en ce qu'elle comprend une traverse de renfort (19) dont les extrémités sont solidaires des deux longeronnets (1 , l') au niveau de chaque moyen de liaison (2a) au ressort de suspension de chaque longeronnet (1 , l'). 14. The rear frame structure of a vehicle according to claim 11, characterized in that it comprises a reinforcing beam (19) whose ends are integral with the two longitudinal members (1, I ') at each connecting means. (2a) to the suspension spring of each spar (1, l ').
15. Véhicule, notamment automobile, comprenant une structure de châssis selon l'une quelconque des revendications 10 à 13. Vehicle, in particular an automobile, comprising a chassis structure according to any one of Claims 10 to 13.
EP16828760.5A 2016-12-20 2016-12-20 Longitudinal member for a rear structure of a vehicle chassis and vehicle comprising such a structure Withdrawn EP3558793A1 (en)

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PCT/FR2016/053574 WO2018115598A1 (en) 2016-12-20 2016-12-20 Longitudinal member for a rear structure of a vehicle chassis and vehicle comprising such a structure

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JP2717860B2 (en) * 1989-07-31 1998-02-25 ダイハツ工業株式会社 Connection structure of body side members
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BR112019009669B1 (en) 2023-04-11

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