WO2022243615A1 - Load-absorption system for reducing the load on a rear underbody of a motor vehicle - Google Patents

Load-absorption system for reducing the load on a rear underbody of a motor vehicle Download PDF

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Publication number
WO2022243615A1
WO2022243615A1 PCT/FR2022/050646 FR2022050646W WO2022243615A1 WO 2022243615 A1 WO2022243615 A1 WO 2022243615A1 FR 2022050646 W FR2022050646 W FR 2022050646W WO 2022243615 A1 WO2022243615 A1 WO 2022243615A1
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WO
WIPO (PCT)
Prior art keywords
force
motor vehicle
crossmember
bracket
reinforcing member
Prior art date
Application number
PCT/FR2022/050646
Other languages
French (fr)
Inventor
Ludovic Meresse
Marc Peru
Nicolas Tropee
David JEAMBRUN
Bernard VACCA
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 WO2022243615A1 publication Critical patent/WO2022243615A1/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
    • B62D25/08—Front or rear portions
    • 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
    • B62D21/152—Front or rear frames

Definitions

  • the present invention claims the priority of French application 2105362 filed on May 21, 2021, the content of which (text, drawings and claims) is incorporated herein by reference.
  • the technical context of the present invention is that of motor vehicle elements used to secure a motor vehicle, elements that can be accommodated therein and its occupants during impacts occurring at the rear of motor vehicles. More particularly, the invention relates to a force absorption system on a lower rear part of a motor vehicle.
  • the force take-up system described therein is intended to allow a take-up of force in a lower rear part of a motor vehicle, in particular in the event of impact.
  • the motor vehicle equipped with such a force system comprises, among other things, a rear end cross member extending over almost the entire width of the motor vehicle and having a determined height and two lateral rear beams, one rear end of which is fixed to the upper part of the extreme rear crossmember.
  • a force-absorbing part is used, fixed to the corresponding rear lateral spar and to the lower part of the extreme rear crossmember.
  • the object of the present invention is to provide a force absorption system on a lower rear part of a motor vehicle in order to respond at least in large part to the above problems and also to lead to other advantages.
  • Another object of the invention is to provide a force absorption system on a low rear part of a space-saving motor vehicle, guaranteeing the compactness and lightness of the motor vehicle.
  • Another object of the invention is to provide a force absorption system on a lower rear part of a motor vehicle which does not negatively impact the mass of the motor vehicle.
  • Another object of the invention is to provide a force absorption system on a lower rear part of a motor vehicle which is universal and configured to adapt to different motor vehicles.
  • a force take-up system on a lower rear part of a motor vehicle comprising ( i) a rear cross member of the motor vehicle, the rear cross member being intended to extend on the one hand between two opposite side edges of the motor vehicle and on the other hand between a rear panel of the motor vehicle and a lining of said rear panel, ( ii) two rear side rails of which a rear end of each rear side rail is secured to a side termination of the rear cross member located opposite, by means of a force-absorbing bracket fixed integrally to the rear lateral spar, (iii) a bending reinforcing member of the rear crossmember, the reinforcing member extending along the crossmember rear between two lateral terminations of said rear crossmember.
  • the rear cross member is configured to extend over almost the entire width of the motor vehicle.
  • the bending reinforcement member of the rear cross member increases the bending stiffness of the recovery system.
  • the reinforcement member allows force to be transmitted to each of the two rear side rails by means of the brackets effort recovery.
  • the reinforcement member makes it possible to reduce the depression of the lining of the rear panel of the motor vehicle in the event of a rear impact in the motor vehicle equipped with the force absorption system according to the invention.
  • Such a force recovery system provided with the bending reinforcing member of the rear cross member, makes it possible to ensure, in the motor vehicle that it equips, the protection of the elements located at the rear of the vehicle. automobile, in particular in front of the lining of the rear panel of the motor vehicle.
  • the invention forms a structural reinforcement of the rear panel and the lining of the rear panel to limit its advance during a rear impact.
  • This solution makes it possible to preserve the rear of the motor vehicle during a rear impact, while being simple to implement.
  • the force absorption system according to the invention has the advantage of overcoming the drawbacks mentioned above, without having to make any significant modification to the motor vehicle that it equips.
  • the force absorption system in accordance with the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination: [14] - each force take-up bracket rests on a rabbet of the corresponding rear lateral spar. Such a configuration stabilizes the positioning of the force-absorbing bracket with respect to the lateral rear spar;
  • each force take-up bracket rests on an upper face of the corresponding rear side member.
  • a force take-up bracket resting on the upper face of the rear lateral spar guarantees force transmission between said spar and the force take-up bracket associated with it during the implementation of the load recovery system.
  • the force take-up bracket is made of a metallic material such as steel. By being made of a metallic material, the force absorption bracket is stiffened. Such a force-absorbing bracket allows effective transmission of force between the reinforcing member and the lateral rear spar associated with said force-absorbing bracket;
  • the force-absorbing bracket is fixed solidly to the rear lateral side member, preferably by welding. It is understood that the force-absorbing bracket is fixed integrally to the lateral rear spar, preferably by a permanent fixing means. By permanent fixing, it is meant that the force-absorbing bracket and the lateral rear spar can only be separated from each other by destruction and/or damage to a part of said force-absorbing bracket and/or said lateral rear spar. Alternatively or simultaneously, the force take-up bracket is fixed integrally to the rear panel;
  • the force take-up system comprises a damping element located between each force take-up bracket and the rear panel. It is understood that the damping element makes it possible to absorb a force occurring behind the rear panel;
  • the damping element is made of a deformable material, such as foam or rubber.
  • a damping element formed from a material with a deformable character has increased force absorption capacities.
  • the damping element deforms, for example by compressing;
  • the reinforcing member comprises a plurality of stiffening webs which extend perpendicularly to the rear crossmember.
  • the plurality of stiffening webs structures the reinforcing member and makes it possible to stiffen it while preserving its absorption capacities.
  • the stiffening webs extend along a longitudinal plane of the motor vehicle.
  • the stiffening webs take the form of a wall;
  • stiffening webs are all parallel to each other. Such veils of stiffening allow a regular deformation of the damping element subjected to deformation;
  • the stiffening webs form ribs which increase the bending stiffness of the rear crossmember.
  • the ribs increase the bending inertia of the force absorption system according to the invention.
  • the reinforcing member comprises a plurality of spacers, each spacer being located between two adjacent stiffening webs.
  • the plurality of spacers connects the stiffening webs to each other.
  • the plurality of spacers makes it possible to maintain a fixed spacing between two stiffening sails outside of an impact situation. When the damping element is subjected to deformation, the plurality of spacers facilitates its regular deformation;
  • stiffening webs are evenly spaced relative to each other along the rear crossmember. In other words, a constant space separates two adjacent stiffening webs;
  • the reinforcing member has at least one stiffening veil opposite each force-absorbing bracket.
  • a reinforcing member more easily transmits to the force-absorbing bracket a force coming from the rear crossmember.
  • the reinforcing member has at least two stiffening sails, advantageously several stiffening sails, opposite each force-absorbing bracket. Such a configuration makes it possible to ensure better flat support of the force-absorbing bracket on the stiffening webs;
  • the rear cross member and the reinforcing member are made from material.
  • the term “made from material” means the fact that, in the force absorption system in accordance with the first aspect of the invention, the rear crossmember and the reinforcing member cannot be separated from each other without it their integrity is not affected in whole or in part.
  • the rear crossmember and the reinforcing member form an assembly qualified as one-piece because they together form only one and the same continuous piece, made of a single piece and obtained during the same manufacturing process.
  • the invention in accordance with its first aspect thus advantageously makes it possible to obtain a prefabricated force-absorbing system, the manufacture of which is simplified since it does away with the assembly of the rear crossmember and the reinforcing member as well than the presence of fastening means between the rear cross member and the reinforcing member.
  • a one-piece load bearing system can be machined in a variety of different sizes so as to be adapted to different models of motor vehicles.
  • Such a force absorption system is also more rigid and lighter;
  • the reinforcing member is made of a composite material, such as for example polypropylene.
  • a composite material lightens the force absorption system according to the invention
  • the rear cross member has a honeycomb structure. It is understood that such a rear cross member has a profile with several closed cells.
  • the honeycomb structure of the rear cross member reinforces the robustness to the mechanical forces that may be imposed on the force take-up system according to the invention while ensuring that said force take-up system is light;
  • the reinforcing member is attached to the rear crossmember, the stiffening webs all comprising a passage opening through which the rear crossmember is housed;
  • the rear cross member is made of a material comprising steel and/or aluminium. Such a rear cross member has increased compressive strength properties;
  • the reinforcement member has a fixing lug on the rear crossmember.
  • the reinforcement member is attached to the rear crossmember and fixed to the rear crossmember by means of the fixing lugs;
  • the fixing lug takes the form of a needle screw which extends through the reinforcement member so as to exert radial support on the rear crossmember;
  • the rear cross member is cylindrical in shape, a cross section of the rear cross member being circular or polygonal, preferably of the quadrilateral type.
  • a motor vehicle comprising a force absorption system in accordance with the first aspect of the invention or according to any of its improvements.
  • the force recovery system allows a recovery of force on a lower rear part of said motor vehicle during an impact occurring at the rear of the motor vehicle.
  • the rear cross member extends between two opposite side edges of the motor vehicle, over almost the entire width of the motor vehicle
  • the rear cross member extends between a rear panel of the motor vehicle and a lining of said rear panel.
  • the bending reinforcing member of the rear cross member increases the bending rigidity of the recovery system.
  • the reinforcement member allows a transmission of force to each of the two rear side rails by means of the force take-up brackets. The reinforcement member makes it possible to reduce the depression of the lining of the rear panel of the motor vehicle in the event of a rear impact with said motor vehicle.
  • the motor vehicle in accordance with the second aspect of the invention has a motorization of the thermal type and/or of the electric type.
  • the motor vehicle in accordance with the second aspect of the invention is for example of the BEV type for the English acronym Battery Electric Vehicle, equipped with an electric motor.
  • the motor vehicle in accordance with the second aspect of the invention is for example of the PHEV type, for the English acronym Plug-in Hybrid Electric, equipped with both a combustion engine and an electric engine.
  • the invention is particularly suitable for motor vehicles with electric motors having large electric batteries housed in a rear unit of the motor vehicle, in front of the lining of the rear panel of the motor vehicle
  • FIG.1 illustrates a schematic view of a motor vehicle according to the second aspect of the invention equipped with a force recovery system according to the first aspect of the invention
  • FIG.2 illustrates a schematic view of the force recovery system according to the first aspect of the invention
  • FIG.3 illustrates a close-up view of a first embodiment of a force take-up bracket of the force take-up system according to the invention
  • FIG.4 illustrates a close-up view of a second embodiment of a force take-up bracket of the force take-up system according to the invention
  • FIG.5 illustrates a series of schematic views of the force recovery system in accordance with the first aspect of the invention in a first embodiment of the invention
  • FIG.6 illustrates a series of schematic views of the force absorption system in accordance with the first aspect of the invention in a second embodiment of the invention
  • FIG.7 illustrates an implementation of the force recovery system in accordance with the first aspect of the invention.
  • the features, variants and different embodiments of the invention may be associated with each other, in various combinations, insofar as they are not mutually exclusive or mutually exclusive.
  • variants of the invention may be imagined comprising only a selection of characteristics described below in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from to the state of the prior art.
  • FIGURE 1 illustrates a schematic view of a motor vehicle 1 according to the second aspect of the invention.
  • a frame of reference is defined in which a longitudinal axis OX, a transverse axis OY and a vertical axis OZ are defined.
  • the longitudinal axis OX corresponds to a trajectory of the motor vehicle 1 when it is in forward gear, in a straight line and on a flat road.
  • the longitudinal axis OX corresponds to a direction running from the front to the rear of the motor vehicle 1, and it is oriented from the front to the rear of the motor vehicle 1.
  • a longitudinal direction parallel to the longitudinal axis OX, the adjectives "front”, “rear” or “frontal” refer to this reference direction, the term “length” also.
  • the transverse axis OY corresponds to the axis around which the wheels of the motor vehicle 1 rotate, and the direction of the axis OY is oriented from a passenger side to a driver's side, in the non-Anglo-Saxon standard.
  • a transverse direction parallel to the transverse axis OY is also defined, and the adjectives “lateral” or “transverse” refer to this reference direction, the term “width” also.
  • the vertical axis OZ is an axis perpendicular simultaneously to the axis OX and to the axis OY, and which is oriented from a floor of the motor vehicle 1 towards a roof of said motor vehicle 1, the adjectives “upper” and “lower” refer to this reference direction, the term “height" also.
  • FIGURE 1 a lower rear part 2 of the motor vehicle 1 is shown in detail.
  • FIGURE 1 shows that the motor vehicle 1 according to the second aspect of the invention comprises two opposite side edges 3, a rear panel 4 and a lining 5 of said rear panel 4.
  • FIGURE 1 shows that the motor vehicle 1 according to the second aspect of the invention is equipped with a force absorption system 6 according to the first aspect of the invention.
  • the force take-up system 6 allows a take-up of force on the lower rear part 2 of a motor vehicle 1.
  • the force take-up system 6 comprises a rear cross member 7 of the motor vehicle 1, two side rear beams 8 , two force-absorbing brackets 9 and, in accordance with the invention, a member 10 for bending reinforcement of the rear crossmember 7.
  • the force-absorbing system 6 is symmetrical with respect to a median longitudinal axis 11 of the vehicle automobile 1 oriented along the direction OX.
  • FIGURE 1 shows that the rear cross member 7 of the motor vehicle 1 extends between the two opposite side edges 3 of the motor vehicle 1, on the quasi- an entire width of the motor vehicle 1.
  • the rear crossmember 7 of the motor vehicle 1 also extends between the rear panel 4 of the motor vehicle 1 and the lining 5 of said rear panel 4, in a space 12 that is usually unused.
  • the rear crosspiece 7 comprises a body 13 of lateral extension and two lateral terminations 14 opposite to each other.
  • FIGURE 1 shows that each of the two lateral rear beams 8 comprises a rear end 15 opposite a front end 16.
  • the rear end 15 of each lateral rear beam 8 is secured to the side termination 14 of the rear crossmember 7 located opposite, via the force take-up bracket 9 fixed integrally both to the lateral rear spar 8 and to the rear crossmember 7.
  • FIGURE 1 shows that the reinforcing member 10 extends along the rear crossmember 7 between the two lateral terminations 14 of said rear crossmember 7.
  • FIGURE 2 illustrates a schematic view of a part of the force absorption system 6 in accordance with the first aspect of the invention, taken at the level of one of the side terminations 14 of the rear crossmember 7.
  • One of the two side rear beams 8, one of the two brackets 9 for absorbing force and a half 17 of the member 10 for bending reinforcement of the rear crossmember 7 are shown there. It is understood that an opposite part of the force absorption system 6 in accordance with the first aspect of the invention, not shown, is similar, by symmetry.
  • FIGURE 2 shows that the reinforcing member 10 marries by its shape and dimensions the rear panel 4 and the lining 5 of the rear panel 4 of the motor vehicle 1.
  • the member 10 reinforcement comprises a plurality of stiffening webs 18 which extend perpendicularly to the rear crossmember 7 and are crossed by the rear crossmember 7.
  • the stiffening webs 18 extend along a longitudinal plane of the motor vehicle 1.
  • the stiffening webs 18 are regularly spaced from each other along the rear crosspiece 7 by a plurality of spacers 19 of the reinforcing member 10 separating two adjacent stiffening webs 18 .
  • FIGURES 3 and 4 illustrate two close-up views of the force recovery system 6 according to the invention, taken at the level of the bracket 9 for force recovery.
  • FIGURES 3 and 4 represents an embodiment of the force-absorbing bracket 9 of the force-absorbing system 6 according to the invention.
  • FIGURES 3 and 4 show that the force-absorbing bracket 9 comprises a horizontal wall 91 resting against the lateral rear spar 8, a vertical wall 92 facing the lining 5 of the rear panel 4 and a wall front 93 connecting the horizontal wall 91 to the vertical wall 92.
  • the force-absorbing bracket 9 further comprises an inner surface 94 opposite an outer surface 95 located in the background of FIGURES 3 and 4.
  • the force-absorbing bracket 9 has a narrower lateral dimension than that of FIGURE 4.
  • the force-absorbing bracket 9 has a larger vertical dimension than that of FIGURE 4.
  • the force-absorbing bracket 9 rests on a rebate 20 of the lateral rear spar 8. More particularly, the outer surface 95 of the bracket 9 for taking up the force rests on a rebate 20 of the lateral rear spar 8.
  • the force take-up bracket 9 rests on an upper face 21 of the lateral rear spar 8. More particularly, the horizontal wall 91 of the bracket 9 for taking up the force rests on an upper face 21 of the lateral rear spar 8.
  • FIGURE 5 illustrates a series of schematic views of part of the force recovery system 6 according to the first aspect of the invention in a first embodiment of the invention, the part of the force recovery system force 6 illustrated in FIGURE 5 being taken at one of the side terminations 14 of the rear crossmember 7.
  • a first insert 501 of FIGURE 5 shows the force absorption system 6 according to the invention seen from the front.
  • a second insert 502 of FIGURE 5 represents the force absorption system 6 according to the invention seen from the front.
  • a third insert 503 of FIGURE 5 represents the force absorption system 6 according to the invention in isometric view.
  • the reinforcing member 10 is attached to the rear crossmember 7.
  • the reinforcing member 10 is formed of a composite material and the rear crossmember 7 is formed of a metal pipe curved at the side terminations 14 relative to the body 13 rectilinear.
  • the first insert 501 of FIGURE 5 and the third insert 503 of FIGURE 5, the stiffening webs 18 all have a passage opening 22 through which the rear crosspiece 7 is housed. Also, the stiffening sails 18 are fitted onto the rear crosspiece 7 and are held apart from each other by the plurality of spacers 19 of the member 10 of reinforcement.
  • the second insert 502 of FIGURE 5 and the third insert 503 of FIGURE 5 show that the rear cross member 7 is cylindrical in shape with a cross section of the rear cross member 7 that is circular.
  • the second inset 502 of FIGURE 5 shows that the reinforcing member 10 has a fixing lug 23 on the rear crossmember 7.
  • the fixing lug 23 takes the form of a conical screw which extends through of the reinforcing member 10 so as to exert radial support on the rear crossmember 7.
  • FIGURE 6 illustrates a series of schematic views of part of the force take-up system 6 according to the first aspect of the invention in a second embodiment of the invention, the part of the take-up system force 6 illustrated in FIGURE 6 being taken at the level of one of the lateral terminations 14 of the rear crossmember 7 as for FIGURE 5.
  • a first insert 601 of FIGURE 6 represents the force recovery system 6 according to the invention seen from the front.
  • a second insert 602 of FIGURE 6 represents the force absorption system 6 according to the invention seen from the front.
  • a third insert 603 of FIGURE 6 represents the force absorption system 6 according to the invention in isometric view.
  • the rear crosspiece 7 and the reinforcing member 10 are made of material.
  • the reinforcing member 10 and the rear crosspiece 7 are formed from a composite material.
  • the plurality of stiffening webs 18 are regularly spaced from the spacers 19.
  • the rear crosspiece 7 has a honeycomb structure.
  • FIGURE 7 illustrates an implementation of the stress relief system 6 according to the first aspect of the invention.
  • the motor vehicle 1 in accordance with the second aspect of the invention is subjected to a rear impact, represented by a first arrow 701.
  • the rear crossmember 7 limits an overturning of the rear panel 4 of the motor vehicle 1 towards the front of the motor vehicle 1.
  • the rear cross member 7 comes to rest on the reinforcing member 10 as shown by the second arrows 702, creating a transverse stress path.
  • the reinforcing member 10 will transfer the forces to the rear side rails 8 as illustrated by the third arrows 703.
  • the force take-up system 6 thus forms a reinforcement structure of the rear panel 4 and of the lining 5 of the rear panel 4 and limits any intrusion during the rear impact beyond the rear crossmember 7, preserving any element upstream of the lining 5 of the rear panel 4 of the motor vehicle 1.
  • the invention relates to a force take-up system 6 on a lower rear part 2 of a motor vehicle 1.
  • the force take-up system 6 according to the invention comprises a rear crossmember 7 of the vehicle automobile 1 and two rear lateral beams 8 of which a rear end 15 of each rear lateral beam 8 is integral with a lateral termination 14 of the rear crossmember 7 located opposite, by means of a bracket 9 for taking up the force integrally fixed both to the lateral rear beam 8 and to the rear crossmember 7.
  • the rear crossmember 7 extends on the one hand between two opposite side edges 3 of the motor vehicle 1 and on the other hand between a rear panel 4 of the motor vehicle 1 and a lining 5 of said rear panel 4.
  • the force absorption system 6 comprises a member 10 for reinforcing the rear crossmember 7 in flexion, organ 10 of reinforcement ent extending along the rear crossmember 7 between two side terminations 14 of said rear crossmember 7.

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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 relates to a load-absorption system (6) for reducing the load on a rear underbody (2) of a motor vehicle (1). The load-absorption system (6) comprises a rear crossbeam (7) of the motor vehicle (1) and two rear side rails (8), one rear end (15) of each rear side rail (8) of which is rigidly attached to a side border (14) of the rear crossbeam (7) by means of a load-absorption bracket (9). The rear crossbeam (7) extends, on the one hand, between two opposing side edges (3) of the motor vehicle (1) and, on the other hand, between a rear panel (4) of the motor vehicle (1) and a lining (5) of the rear panel (4). The load-absorption system (6) comprises a member (10) for flexurally reinforcing the rear crossbeam (7) which extends along the rear crossbeam (7) between two side borders (14) of the rear crossbeam (7).

Description

Description Description
Titre de l'invention : Système de reprise d’effort sur une partie basse arrière d’un véhicule automobile Title of the invention: Force absorption system on a lower rear part of a motor vehicle
[1] jLa présente invention revendique la priorité de la demande française 2105362 déposée le 21 Mai 2021 dont le contenu (texte, dessins et revendications) est ici incorporé par référence. Le contexte technique de la présente invention est celui des éléments de véhicules automobiles servant à sécuriser un véhicule automobile, des éléments pouvant y être logés et ses occupants lors des chocs survenant à l’arrière des véhicules automobiles. Plus particulièrement, l’invention a trait à un système de reprise d’effort sur une partie basse arrière d’un véhicule automobile. [1] The present invention claims the priority of French application 2105362 filed on May 21, 2021, the content of which (text, drawings and claims) is incorporated herein by reference. The technical context of the present invention is that of motor vehicle elements used to secure a motor vehicle, elements that can be accommodated therein and its occupants during impacts occurring at the rear of motor vehicles. More particularly, the invention relates to a force absorption system on a lower rear part of a motor vehicle.
[2] Dans l’état de la technique, on connaît des éléments structuraux des véhicules automobiles et notamment des ensembles de protection configurés pour absorber ou dissiper un choc survenant au niveau du véhicule automobile. Ces ensembles de protection permettent de protéger des éléments du véhicule automobile, notamment les éléments situés au niveau d’une unité arrière dudit véhicule automobile, ainsi que les éléments situés au niveau d’un habitacle du véhicule automobile, tout comme leurs occupants. [2] In the state of the art, there are known structural elements of motor vehicles and in particular protective assemblies configured to absorb or dissipate a shock occurring at the level of the motor vehicle. These protective assemblies make it possible to protect elements of the motor vehicle, in particular the elements located at the level of a rear unit of said motor vehicle, as well as the elements located at the level of a passenger compartment of the motor vehicle, as well as their occupants.
[3] Parmi ces ensembles de protection, on connaît un système de reprise d’effort décrit dans le document FR2932147 B1. Le système de reprise d'effort qui y est décrit est destiné à une permettre une reprise d’effort dans une partie basse arrière d'un véhicule automobile, notamment en cas de chocs. Le véhicule automobile équipé d’un tel système d’effort comporte, entre autres, une traverse extrême arrière s'étendant sur la quasi-totalité de la largeur du véhicule automobile et ayant une hauteur déterminée et deux longerons arrière latéraux dont une extrémité arrière est fixée sur la partie supérieure de la traverse extrême arrière. Conformément à l’invention décrite dans le document FR2932147 B1 pour chaque longeron arrière latéral, on utilise une pièce de reprise d'effort fixée sur le longeron arrière latéral correspondant et sur la partie inférieure de la traverse extrême arrière. [3] Among these protective assemblies, there is a force absorption system described in the document FR2932147 B1. The force take-up system described therein is intended to allow a take-up of force in a lower rear part of a motor vehicle, in particular in the event of impact. The motor vehicle equipped with such a force system comprises, among other things, a rear end cross member extending over almost the entire width of the motor vehicle and having a determined height and two lateral rear beams, one rear end of which is fixed to the upper part of the extreme rear crossmember. In accordance with the invention described in document FR2932147 B1, for each rear lateral spar, a force-absorbing part is used, fixed to the corresponding rear lateral spar and to the lower part of the extreme rear crossmember.
[4] L’inconvénient de ces systèmes de reprise d’effort est qu’ils offrent une capacité d’absorption d’énergie en cas de choc arrière insuffisante pour protéger l’unité arrière du véhicule automobile et des élément critiques pouvant y être logés. Notamment, dans le contexte de véhicules automobiles dotés d'une motorisation électrique, ces systèmes de reprise d’effort sont inefficaces pour limiter un endommagement de batteries électriques du véhicule automobile, ces batteries électriques étant logées dans l’unité arrière du véhicule automobile, en avant d’un pare-chocs arrière du véhicule automobile et entre les longerons arrière latéraux du véhicule automobile. Les batteries électriques actuelles tendent en effet à occuper un volume plus important, notamment pour faire gagner en autonomie le véhicule automobile qu’elles équipent. Dans une telle configuration, les batteries électriques du véhicule automobile se trouvent particulièrement mises en péril lors d’un choc arrière, ce qui expose le véhicule automobile et de ses occupants à des risques électriques importants. [4] The disadvantage of these force absorption systems is that they offer insufficient energy absorption capacity in the event of a rear impact to protect the rear unit of the motor vehicle and the critical elements that can be housed therein . In particular, in the context of motor vehicles equipped with an electric motor, these force take-up systems are ineffective in limiting damage to the electric batteries of the motor vehicle, these electric batteries being housed in the rear unit of the motor vehicle, in front of a rear bumper of the motor vehicle and between the rear side rails of the motor vehicle. Current electric batteries indeed tend to occupy a larger volume, in particular to increase the autonomy of the motor vehicle that they equip. In such a configuration, the electric batteries of the motor vehicle are particularly endangered during a rear impact, which exposes the motor vehicle and its occupants to significant electrical risks.
[5] La présente invention a pour objet de proposer un système de reprise d’effort sur une partie basse arrière d’un véhicule automobile afin de répondre au moins en grande partie aux problèmes précédents et de conduire en outre à d’autres avantages. [5] The object of the present invention is to provide a force absorption system on a lower rear part of a motor vehicle in order to respond at least in large part to the above problems and also to lead to other advantages.
[6] Un autre but de l’invention est de proposer un système de reprise d’effort sur une partie basse arrière d’un véhicule automobile peu encombrant, garantissant la compacité et la légèreté du véhicule automobile. [6] Another object of the invention is to provide a force absorption system on a low rear part of a space-saving motor vehicle, guaranteeing the compactness and lightness of the motor vehicle.
[7] Un autre but de l’invention est de proposer un système de reprise d’effort sur une partie basse arrière d’un véhicule automobile qui n’impacte pas négativement la masse du véhicule automobile. [7] Another object of the invention is to provide a force absorption system on a lower rear part of a motor vehicle which does not negatively impact the mass of the motor vehicle.
[8] Un autre but de l’invention est de proposer un système de reprise d’effort sur une partie basse arrière d’un véhicule automobile qui soit universel et configuré pour s’adapter à différents véhicules automobiles. [8] Another object of the invention is to provide a force absorption system on a lower rear part of a motor vehicle which is universal and configured to adapt to different motor vehicles.
[9] Selon un premier aspect de l’invention, on atteint au moins l’un des objectifs précités avec un système de reprise d’effort sur une partie basse arrière d’un véhicule automobile, le système de reprise d’effort comportant (i) une traverse arrière du véhicule automobile, la traverse arrière étant destinée à s’étendre d’une part entre deux bords latéraux opposés du véhicule automobile et d’autre part entre un panneau arrière du véhicule automobile et une doublure dudit panneau arrière, (ii) deux longerons arrière latéraux dont une extrémité arrière de chaque longeron arrière latéral est solidaire d’une terminaison latérale de la traverse arrière située en regard, par l’intermédiaire d’une équerre de reprise d’effort fixée solidairement au longeron arrière latéral, (iii) un organe de renforcement en flexion de la traverse arrière, l’organe de renforcement s’étendant le long de la traverse arrière entre deux terminaisons latérales de ladite traverse arrière. [9] According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with a force take-up system on a lower rear part of a motor vehicle, the force take-up system comprising ( i) a rear cross member of the motor vehicle, the rear cross member being intended to extend on the one hand between two opposite side edges of the motor vehicle and on the other hand between a rear panel of the motor vehicle and a lining of said rear panel, ( ii) two rear side rails of which a rear end of each rear side rail is secured to a side termination of the rear cross member located opposite, by means of a force-absorbing bracket fixed integrally to the rear lateral spar, (iii) a bending reinforcing member of the rear crossmember, the reinforcing member extending along the crossmember rear between two lateral terminations of said rear crossmember.
[10] Dans le système de reprise d’effort conforme au premier aspect de l’invention, la traverse arrière est configurée pour s’étendre sur la quasi-totalité d’une largeur du véhicule automobile. [10] In the force recovery system according to the first aspect of the invention, the rear cross member is configured to extend over almost the entire width of the motor vehicle.
[11] Dans le système de reprise d’effort conforme au premier aspect de l’invention, l’organe de renforcement en flexion de la traverse arrière augmente la rigidité en flexion du système de reprise. Lors d’un choc survenant à l’arrière du véhicule automobile équipé du système de reprise d’effort selon l’invention, l’organe de renforcement permet une transmission d’effort à chacun des deux longerons arrière latéraux par l’intermédiaire des équerres de reprise d’effort. L’organe de renforcement permet de réduire l’enfoncement de la doublure du panneau arrière du véhicule automobile en cas de choc arrière dans le véhicule automobile équipé du système de reprise d’effort selon l’invention. [11] In the force recovery system according to the first aspect of the invention, the bending reinforcement member of the rear cross member increases the bending stiffness of the recovery system. In the event of an impact occurring at the rear of the motor vehicle equipped with the force absorption system according to the invention, the reinforcement member allows force to be transmitted to each of the two rear side rails by means of the brackets effort recovery. The reinforcement member makes it possible to reduce the depression of the lining of the rear panel of the motor vehicle in the event of a rear impact in the motor vehicle equipped with the force absorption system according to the invention.
[12] Un tel système de reprise d’effort, pourvu de l’organe de renforcement en flexion de la traverse arrière permet d’assurer, dans le véhicule automobile qu’il équipe, la protection des éléments situés à l’arrière du véhicule automobile, notamment en avant de la doublure du panneau arrière du véhicule automobile. L’invention forme un renfort structural du panneau arrière et de la doublure du panneau arrière pour en limiter l’avancer lors d’un choc arrière. Ainsi, cette solution permet de préserver l’arrière du véhicule automobile lors d’un choc arrière, tout en étant simple à mettre en œuvre. Le système de reprise d’effort selon l’invention présente l’avantage de pallier les inconvénients cités plus haut, sans avoir à apporter de modification importante au véhicule automobile qu’il équipe. [12] Such a force recovery system, provided with the bending reinforcing member of the rear cross member, makes it possible to ensure, in the motor vehicle that it equips, the protection of the elements located at the rear of the vehicle. automobile, in particular in front of the lining of the rear panel of the motor vehicle. The invention forms a structural reinforcement of the rear panel and the lining of the rear panel to limit its advance during a rear impact. Thus, this solution makes it possible to preserve the rear of the motor vehicle during a rear impact, while being simple to implement. The force absorption system according to the invention has the advantage of overcoming the drawbacks mentioned above, without having to make any significant modification to the motor vehicle that it equips.
[13] Le système de reprise d’effort conforme au premier aspect de l’invention comprend avantageusement au moins un des perfectionnements ci-dessous, les caractéristiques techniques formant ces perfectionnements pouvant être prises seules ou en combinaison : [14] - chaque équerre de reprise d’effort est en appui sur une feuillure du longeron arrière latéral correspondant. Une telle configuration stabilise le positionnement de l’équerre de reprise d’effort par rapport au longeron arrière latéral ; [13] The force absorption system in accordance with the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination: [14] - each force take-up bracket rests on a rabbet of the corresponding rear lateral spar. Such a configuration stabilizes the positioning of the force-absorbing bracket with respect to the lateral rear spar;
[15] - chaque équerre de reprise d’effort est en appui sur une face supérieure du longeron arrière latéral correspondant. Une équerre de reprise d’effort en appui sur la face supérieure du longeron arrière latéral garanti une transmission d’effort entre ledit longeron et l’équerre de reprise d’effort qui lui est associée lors de la mise en œuvre du système de reprise d’effort conforme au premier aspect de l’invention ; [15] - each force take-up bracket rests on an upper face of the corresponding rear side member. A force take-up bracket resting on the upper face of the rear lateral spar guarantees force transmission between said spar and the force take-up bracket associated with it during the implementation of the load recovery system. effort according to the first aspect of the invention;
[16] - l’équerre de reprise d’effort est formée d’un matériau métallique du type acier. En étant formée d’un matériau métallique, l’équerre de reprise d’effort est rigidifiée. Une telle équerre de reprise d’effort permet une transmission d’effort efficace entre l’organe de renforcement et le longeron arrière latéral associé à ladite équerre de reprise d’effort ; [16] - the force take-up bracket is made of a metallic material such as steel. By being made of a metallic material, the force absorption bracket is stiffened. Such a force-absorbing bracket allows effective transmission of force between the reinforcing member and the lateral rear spar associated with said force-absorbing bracket;
[17] - l’équerre de reprise d’effort est fixée solidairement au longeron arrière latéral, de préférence par soudage. On comprend que l’équerre de reprise d’effort est fixée solidairement au longeron arrière latéral, de préférence par un moyen de fixation définitive. Par fixation définitive, on entend que l’équerre de reprise d’effort et le longeron arrière latéral ne peuvent être séparés l’un de l’autre que par destruction et/ou endommagement d’une partie de ladite équerre de reprise d’effort et/ou dudit longeron arrière latéral. Alternativement ou simultanément, l’équerre de reprise d’effort est fixée solidairement au panneau arrière ; [17] - the force-absorbing bracket is fixed solidly to the rear lateral side member, preferably by welding. It is understood that the force-absorbing bracket is fixed integrally to the lateral rear spar, preferably by a permanent fixing means. By permanent fixing, it is meant that the force-absorbing bracket and the lateral rear spar can only be separated from each other by destruction and/or damage to a part of said force-absorbing bracket and/or said lateral rear spar. Alternatively or simultaneously, the force take-up bracket is fixed integrally to the rear panel;
[18] - le système de reprise d’effort comporte un élément d’amortissement situé entre chaque équerre de reprise d’effort et le panneau arrière. On comprend que l’élément d’amortissement permet d’absorber un effort survenant en arrière du panneau arrière ; [18] - the force take-up system comprises a damping element located between each force take-up bracket and the rear panel. It is understood that the damping element makes it possible to absorb a force occurring behind the rear panel;
[19] - l’élément d’amortissement est formé d’un matériau à caractère déformable, tel une mousse ou un caoutchouc. Un élément d’amortissement formé d’un matériau à caractère déformable a des capacités d’absorption d’effort accrues. Lorsque le système de reprise d’effort selon l’invention est soumis à un effort au niveau de la traverse arrière, l’élément d’amortissement se déforme, par exemple en se comprimant ; [20] - l’organe de renforcement comporte une pluralité de voiles de rigidification qui s’étendent perpendiculairement à la traverse arrière. La pluralité de voiles de rigidification structure l’organe de renforcement et permet de le rigidifier tout en préservant ses capacités d’absorption. Dans le véhicule automobile équipé du système de reprise d’effort selon l’invention, les voiles de rigidification s’étendent selon un plan longitudinal du véhicule automobile. Les voiles de rigidification prennent la forme d’une paroi ; [19] - the damping element is made of a deformable material, such as foam or rubber. A damping element formed from a material with a deformable character has increased force absorption capacities. When the force absorption system according to the invention is subjected to a force at the rear crossmember, the damping element deforms, for example by compressing; [20] - the reinforcing member comprises a plurality of stiffening webs which extend perpendicularly to the rear crossmember. The plurality of stiffening webs structures the reinforcing member and makes it possible to stiffen it while preserving its absorption capacities. In the motor vehicle equipped with the force absorption system according to the invention, the stiffening webs extend along a longitudinal plane of the motor vehicle. The stiffening webs take the form of a wall;
[21] - les voiles de rigidification sont tous parallèles entre eux. De telles voiles de rigidifications permettent une déformation régulière de l’élément d’amortissement soumis à déformation ; [21] - the stiffening webs are all parallel to each other. Such veils of stiffening allow a regular deformation of the damping element subjected to deformation;
[22] - les voiles de rigidification forment des nervures qui augmentent la rigidité en flexion de la traverse arrière. Les nervures augmentent l’inertie de flexion du système de reprise d’effort selon l’invention. Lorsque le système de reprise d’effort selon l’invention est soumis à un effort sensiblement perpendiculaire à la traverse arrière, l’élément d’amortissement se déforme en se comprimant latéralement, absorbant une partie de l’effort et rapprochant les voiles de rigidification les uns des autres. Ainsi comprimé, l’élément d’amortissement augmente la rigidité en flexion de la traverse arrière ; [22] - the stiffening webs form ribs which increase the bending stiffness of the rear crossmember. The ribs increase the bending inertia of the force absorption system according to the invention. When the force absorption system according to the invention is subjected to a force substantially perpendicular to the rear crossmember, the damping element deforms by compressing laterally, absorbing part of the force and bringing the stiffening sails closer together. one another. Thus compressed, the damping element increases the bending stiffness of the rear crossmember;
[23] - l’organe de renforcement comporte une pluralité d’entretoises, chaque entretoise étant située entre deux voiles de rigidification adjacents. La pluralité d’entretoise relie les voiles de rigidification les uns aux autres. La pluralité d’entretoise permet de maintenir un écartement fixe entre deux voiles de rigidification hors situation de choc. Lorsque l’élément d’amortissement soumis à déformation, la pluralité d’entretoise facilite sa déformation régulière ; [23] - the reinforcing member comprises a plurality of spacers, each spacer being located between two adjacent stiffening webs. The plurality of spacers connects the stiffening webs to each other. The plurality of spacers makes it possible to maintain a fixed spacing between two stiffening sails outside of an impact situation. When the damping element is subjected to deformation, the plurality of spacers facilitates its regular deformation;
[24] - les voiles de rigidification sont régulièrement espacés les uns par rapport aux autres le long de la traverse arrière. Autrement dit, un espace constant sépare deux voiles de rigidification adjacents ; [24] - the stiffening webs are evenly spaced relative to each other along the rear crossmember. In other words, a constant space separates two adjacent stiffening webs;
[25] - la traverse arrière s’étend au travers des voiles de rigidification ; [25] - the rear crossmember extends through the stiffening panels;
[26] - l’organe de renforcement présente au moins un voile de rigidification en regard de chaque équerre de reprise d’effort. Un tel organe de renforcement transmet plus facilement vers l’équerre de reprise d’effort un effort issu de la traverse arrière. De préférence, l’organe de renforcement présente au moins deux voiles de rigidification, avantageusement plusieurs voiles de rigidification, en regard de chaque équerre de reprise d’effort. Une telle configuration permet d’assurer un meilleur appui plan de l’équerre de reprise d’effort sur les voiles de rigidification ; [26] - the reinforcing member has at least one stiffening veil opposite each force-absorbing bracket. Such a reinforcing member more easily transmits to the force-absorbing bracket a force coming from the rear crossmember. Preferably, the reinforcing member has at least two stiffening sails, advantageously several stiffening sails, opposite each force-absorbing bracket. Such a configuration makes it possible to ensure better flat support of the force-absorbing bracket on the stiffening webs;
[27] - selon un premier mode de réalisation de l’invention, la traverse arrière et l’organe de renforcement sont issus de matière. On entend par « issus de matière » le fait que, dans le système de reprise d’effort conforme au premier aspect de l’invention, la traverse arrière et l’organe de renforcement ne peuvent être séparés les uns des autres sans qu’il ne soit porté atteinte à tout ou partie de leur intégrité. Ainsi, dans le système de reprise d’effort selon l’invention, la traverse arrière et l’organe de renforcement forment un ensemble qualifié de monobloc du fait qu’ils ne forment ensemble qu’une seule et même pièce continue, faite d’un seul tenant et obtenue au cours d’un même procédé de fabrication. L’invention conforme à son premier aspect permet ainsi avantageusement d’obtenir un système de reprise d’effort préfabriqué, dont la fabrication est simplifiée puisqu’elle s’affranchi de l’assemblage de la traverse arrière et de l’organe de renforcement ainsi que de la présence de moyens de fixation entre la traverse arrière et l’organe de renforcement. De plus, un le système de reprise d’effort monobloc peut être usiné dans une variété de dimensions différentes de sorte à être adapté à différents modèles de véhicules automobiles. Un tel le système de reprise d’effort est par ailleurs plus rigide et plus léger ; [27] - according to a first embodiment of the invention, the rear cross member and the reinforcing member are made from material. The term “made from material” means the fact that, in the force absorption system in accordance with the first aspect of the invention, the rear crossmember and the reinforcing member cannot be separated from each other without it their integrity is not affected in whole or in part. Thus, in the force-absorbing system according to the invention, the rear crossmember and the reinforcing member form an assembly qualified as one-piece because they together form only one and the same continuous piece, made of a single piece and obtained during the same manufacturing process. The invention in accordance with its first aspect thus advantageously makes it possible to obtain a prefabricated force-absorbing system, the manufacture of which is simplified since it does away with the assembly of the rear crossmember and the reinforcing member as well than the presence of fastening means between the rear cross member and the reinforcing member. In addition, a one-piece load bearing system can be machined in a variety of different sizes so as to be adapted to different models of motor vehicles. Such a force absorption system is also more rigid and lighter;
[28] - l’organe de renforcement est formé d’un matériau composite, tel que par exemple du polypropylène. Un tel matériau composite allège le système de reprise d’effort selon l’invention ; [28] - the reinforcing member is made of a composite material, such as for example polypropylene. Such a composite material lightens the force absorption system according to the invention;
[29] - la traverse arrière a une structure alvéolaire. On comprend qu’une telle traverse arrière a un profilé présentant plusieurs cellules fermées. La structure alvéolaire de traverse arrière renforce la robustesse aux efforts mécaniques pouvant être imposés au système de reprise d’effort selon l’invention tout en assurant une légèreté dudit système de reprise d’effort ; [29] - the rear cross member has a honeycomb structure. It is understood that such a rear cross member has a profile with several closed cells. The honeycomb structure of the rear cross member reinforces the robustness to the mechanical forces that may be imposed on the force take-up system according to the invention while ensuring that said force take-up system is light;
[30] - selon un deuxième mode de réalisation de l’invention alternatif au premier mode de réalisation de l’invention l’organe de renforcement est rapporté sur la traverse arrière, les voiles de rigidification comportant toutes une ouverture de passage au travers de laquelle la traverse arrière est logée ; [30] - according to a second alternative embodiment of the invention to the first embodiment of the invention, the reinforcing member is attached to the rear crossmember, the stiffening webs all comprising a passage opening through which the rear crossmember is housed;
[31] - la traverse arrière est formée d’un matériau comportant de l’acier et/ou de l’aluminium. Une telle traverse arrière a des propriétés de résistance mécanique en compression accrues ; [31] - the rear cross member is made of a material comprising steel and/or aluminium. Such a rear cross member has increased compressive strength properties;
[32] - l’organe de renforcement comporte une patte de fixation sur la traverse arrière. L’organe de renforcement est rapporté sur la traverse arrière et fixé sur la traverse arrière par l’intermédiaire des pattes de fixation ; [32] - the reinforcement member has a fixing lug on the rear crossmember. The reinforcement member is attached to the rear crossmember and fixed to the rear crossmember by means of the fixing lugs;
[33] - la patte de fixation prend la forme d’une vis pointeau qui s’étend au travers de l’organe de renforcement de manière à exercer un appui radial sur la traverse arrière ; [33] - the fixing lug takes the form of a needle screw which extends through the reinforcement member so as to exert radial support on the rear crossmember;
[34] - l’organe de renforcement est collé sur la traverse arrière ; [34] - the reinforcement member is glued to the rear crossmember;
[35] - la traverse arrière est de forme cylindrique, une section transverse de la traverse arrière étant circulaire ou polygonale, préférentiellement du type d’un quadrilatère. [35] - the rear cross member is cylindrical in shape, a cross section of the rear cross member being circular or polygonal, preferably of the quadrilateral type.
[36] Selon un deuxième aspect de l’invention, il est proposé un véhicule automobile comportant un système de reprise d’effort conforme au premier aspect de l’invention ou selon l’un quelconque de ses perfectionnements. [36] According to a second aspect of the invention, a motor vehicle is proposed comprising a force absorption system in accordance with the first aspect of the invention or according to any of its improvements.
[37] Dans véhicule automobile conforme au deuxième aspect de l’invention, le système de reprise d’effort permet une reprise d’effort sur une partie basse arrière dudit véhicule automobile lors d’un choc survenant à l’arrière du véhicule automobile. [37] In a motor vehicle in accordance with the second aspect of the invention, the force recovery system allows a recovery of force on a lower rear part of said motor vehicle during an impact occurring at the rear of the motor vehicle.
[38] Dans véhicule automobile conforme au deuxième aspect de l’invention, la traverse arrière s’étendre entre deux bords latéraux opposés du véhicule automobile, sur la quasi-totalité d’une largeur du véhicule automobile [38] In a motor vehicle according to the second aspect of the invention, the rear cross member extends between two opposite side edges of the motor vehicle, over almost the entire width of the motor vehicle
[39] Dans véhicule automobile conforme au deuxième aspect de l’invention, la traverse arrière s’étend entre un panneau arrière du véhicule automobile et une doublure dudit panneau arrière. [39] In a motor vehicle according to the second aspect of the invention, the rear cross member extends between a rear panel of the motor vehicle and a lining of said rear panel.
[40] Dans véhicule automobile conforme au deuxième aspect de l’invention, l’organe de renforcement en flexion de la traverse arrière augmente la rigidité en flexion du système de reprise. Lors d’un choc survenant à l’arrière du véhicule automobile conforme au deuxième aspect de l’invention, l’organe de renforcement permet une transmission d’effort à chacun des deux longerons arrière latéraux par l’intermédiaire des équerres de reprise d’effort. L’organe de renforcement permet de réduire l’enfoncement de la doublure du panneau arrière du véhicule automobile en cas de choc arrière audit véhicule automobile. [40] In a motor vehicle according to the second aspect of the invention, the bending reinforcing member of the rear cross member increases the bending rigidity of the recovery system. In the event of an impact occurring at the rear of the vehicle motor vehicle according to the second aspect of the invention, the reinforcement member allows a transmission of force to each of the two rear side rails by means of the force take-up brackets. The reinforcement member makes it possible to reduce the depression of the lining of the rear panel of the motor vehicle in the event of a rear impact with said motor vehicle.
[41] Dans un tel véhicule automobile, la protection des éléments situés à l’arrière du véhicule automobile, notamment en avant de la doublure du panneau arrière du véhicule automobile est renforcée. Ainsi, cette solution permet de préserver l’arrière du véhicule automobile lors d’un choc arrière, tout en étant simple à mettre en œuvre. [41] In such a motor vehicle, the protection of the elements located at the rear of the motor vehicle, in particular in front of the lining of the rear panel of the motor vehicle, is reinforced. Thus, this solution makes it possible to preserve the rear of the motor vehicle during a rear impact, while being simple to implement.
[42] Le véhicule automobile conforme au deuxième aspect de l’invention a une motorisation du type thermique et/ou du type électrique. Le véhicule automobile conforme au deuxième aspect de l’invention est par exemple de type BEV pour l’acronyme anglais Battery Electric Vehicle, dotés d'une motorisation électrique. Le véhicule automobile conforme au deuxième aspect de l’invention est par exemple de type PHEV, pour l’acronyme anglais Plug-in Hybrid Electric, dotés à la fois d'une motorisation thermique et d'une motorisation électrique. [42] The motor vehicle in accordance with the second aspect of the invention has a motorization of the thermal type and/or of the electric type. The motor vehicle in accordance with the second aspect of the invention is for example of the BEV type for the English acronym Battery Electric Vehicle, equipped with an electric motor. The motor vehicle in accordance with the second aspect of the invention is for example of the PHEV type, for the English acronym Plug-in Hybrid Electric, equipped with both a combustion engine and an electric engine.
[43] L’invention est particulièrement adaptée aux véhicules automobiles à motorisation électrique ayant des batteries électriques volumineuses logées dans une unité arrière du véhicule automobile, en avant de la doublure du panneau arrière du véhicule automobile [43] The invention is particularly suitable for motor vehicles with electric motors having large electric batteries housed in a rear unit of the motor vehicle, in front of the lining of the rear panel of the motor vehicle
[44] Des modes de réalisation variés de l’invention sont prévus, intégrant selon l’ensemble de leurs combinaisons possibles les différentes caractéristiques optionnelles exposées ici. [44] Various embodiments of the invention are provided, integrating, according to all of their possible combinations, the various optional features set out here.
[45] D’autres caractéristiques et avantages de l’invention apparaîtront encore au travers de la description qui suit d’une part, et de plusieurs exemples de réalisation donnés à titre indicatif et non limitatif en référence aux dessins schématiques annexés d’autre part, sur lesquels : [45] Other characteristics and advantages of the invention will become apparent through the description which follows on the one hand, and several examples of embodiment given by way of indication and not limiting with reference to the appended schematic drawings on the other hand. , on which ones :
[46] [Fig .1 ] illustre une vue schématique d’un véhicule automobile conforme au deuxième aspect de l’invention équipé d’un système de reprise d’effort conforme au premier aspect de l’invention ; [47] [Fig.2] illustre une vue schématique du système de reprise d’effort conforme au premier aspect de l’invention ; [46] [Fig .1] illustrates a schematic view of a motor vehicle according to the second aspect of the invention equipped with a force recovery system according to the first aspect of the invention; [47] [Fig.2] illustrates a schematic view of the force recovery system according to the first aspect of the invention;
[48] [Fig.3] illustre une vue rapprochée d’un premier exemple de réalisation d’une équerre de reprise d’effort du système de reprise d’effort selon l’invention ; [49] [Fig .4] illustre une vue rapprochée d’un deuxième exemple de réalisation d’une équerre de reprise d’effort du système de reprise d’effort selon l’invention ; [48] [Fig.3] illustrates a close-up view of a first embodiment of a force take-up bracket of the force take-up system according to the invention; [49] [Fig .4] illustrates a close-up view of a second embodiment of a force take-up bracket of the force take-up system according to the invention;
[50] [Fig.5] illustre une série de vues schématiques du système de reprise d’effort conforme au premier aspect de l’invention dans un premier mode de réalisation de l’invention ; [51] [Fig.6] illustre une série de vues schématiques du système de reprise d’effort conforme au premier aspect de l’invention dans un deuxième mode de réalisation de l’invention ; [50] [Fig.5] illustrates a series of schematic views of the force recovery system in accordance with the first aspect of the invention in a first embodiment of the invention; [51] [Fig.6] illustrates a series of schematic views of the force absorption system in accordance with the first aspect of the invention in a second embodiment of the invention;
[52] [Fig.7] illustre une mise en œuvre du système de reprise d’effort conforme au premier aspect de l’invention. [53] Bien entendu, les caractéristiques, les variantes et les différentes formes de réalisation de l'invention peuvent être associées les unes avec les autres, selon diverses combinaisons, dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres. On pourra notamment imaginer des variantes de l’invention ne comprenant qu’une sélection de caractéristiques décrites par la suite de manière isolées des autres caractéristiques décrites, si cette sélection de caractéristiques est suffisante pour conférer un avantage technique ou pour différencier l’invention par rapport à l’état de la technique antérieur. [52] [Fig.7] illustrates an implementation of the force recovery system in accordance with the first aspect of the invention. [53] Of course, the features, variants and different embodiments of the invention may be associated with each other, in various combinations, insofar as they are not mutually exclusive or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of characteristics described below in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from to the state of the prior art.
[54] En particulier toutes les variantes et tous les modes de réalisation décrits sont combinables entre eux si rien ne s’oppose à cette combinaison sur le plan technique. [54] In particular, all the variants and all the embodiments described can be combined with each other if nothing prevents this combination from a technical point of view.
[55] Sur les figures, les éléments communs à plusieurs figures conservent la même référence. [55] In the figures, the elements common to several figures retain the same reference.
[56] La FIGURE 1 illustre une vue schématique d’un véhicule automobile 1 conforme au deuxième aspect de l’invention. Dans la suite de la description, on définit un référentiel dans lequel sont définis un axe longitudinal OX, un axe transversal OY et un axe vertical OZ. L’axe longitudinal OX correspond à une trajectoire du véhicule automobile 1 lorsqu’il est en marche avant, en ligne droite et sur une route plate. L’axe longitudinal OX correspond à une direction allant de l’avant à l’arrière du véhicule automobile 1, et il est orienté depuis l’avant vers l’arrière du véhicule automobile 1. On définit également une direction longitudinale parallèle à l’axe longitudinal OX, les adjectifs « avant », « arrière » ou « frontal » se réfèrent à cette direction de référence, le terme « longueur » également. L’axe transversal OY correspond à l’axe autour desquels des roues du véhicule automobile 1 tournent, et le sens de l’axe OY est orienté depuis un côté passager vers un côté conducteur, dans la norme non anglo-saxonne. On définit également une direction transversale parallèle à l’axe transversal OY, et les adjectifs « latéral » ou « transversal » se réfèrent à cette direction de référence, le terme « largeur » également. L’axe vertical OZ est un axe perpendiculaire simultanément à l’axe OX et à l’axe OY, et qui est orienté depuis un plancher du véhicule automobile 1 vers un toit dudit véhicule automobile 1 , les adjectifs « supérieur » et « inférieur » se réfèrent à cette direction de référence, le terme « hauteur » également. [56] FIGURE 1 illustrates a schematic view of a motor vehicle 1 according to the second aspect of the invention. In the remainder of the description, a frame of reference is defined in which a longitudinal axis OX, a transverse axis OY and a vertical axis OZ are defined. The longitudinal axis OX corresponds to a trajectory of the motor vehicle 1 when it is in forward gear, in a straight line and on a flat road. The longitudinal axis OX corresponds to a direction running from the front to the rear of the motor vehicle 1, and it is oriented from the front to the rear of the motor vehicle 1. A longitudinal direction parallel to the longitudinal axis OX, the adjectives "front", "rear" or "frontal" refer to this reference direction, the term "length" also. The transverse axis OY corresponds to the axis around which the wheels of the motor vehicle 1 rotate, and the direction of the axis OY is oriented from a passenger side to a driver's side, in the non-Anglo-Saxon standard. A transverse direction parallel to the transverse axis OY is also defined, and the adjectives “lateral” or “transverse” refer to this reference direction, the term “width” also. The vertical axis OZ is an axis perpendicular simultaneously to the axis OX and to the axis OY, and which is oriented from a floor of the motor vehicle 1 towards a roof of said motor vehicle 1, the adjectives “upper” and “lower” refer to this reference direction, the term "height" also.
[57] Dans la FIGURE 1, une partie basse arrière 2 du véhicule automobile 1 est représentée de façon détaillée. [57] In FIGURE 1, a lower rear part 2 of the motor vehicle 1 is shown in detail.
[58] La FIGURE 1 montre que le véhicule automobile 1 conforme au deuxième aspect de l’invention comprend deux bords latéraux 3 opposés, un panneau arrière 4 et une doublure 5 dudit panneau arrière 4. [58] FIGURE 1 shows that the motor vehicle 1 according to the second aspect of the invention comprises two opposite side edges 3, a rear panel 4 and a lining 5 of said rear panel 4.
[59] La FIGURE 1 montre que le véhicule automobile 1 conforme au deuxième aspect de l’invention est équipé d’un système de reprise d’effort 6 conforme au premier aspect de l’invention. Le système de reprise d’effort 6 permet une reprise d’effort sur la partie basse arrière 2 d’un véhicule automobile 1. Le système de reprise d’effort 6 comporte une traverse arrière 7 du véhicule automobile 1, deux longerons 8 arrière latéraux, deux équerres 9 de reprise d’effort et, conformément à l’invention, un organe 10 de renforcement en flexion de la traverse arrière 7. Le système de reprise d’effort 6 est symétrique par rapport à un axe longitudinal médian 11 du véhicule automobile 1 orienté selon la direction OX. [59] FIGURE 1 shows that the motor vehicle 1 according to the second aspect of the invention is equipped with a force absorption system 6 according to the first aspect of the invention. The force take-up system 6 allows a take-up of force on the lower rear part 2 of a motor vehicle 1. The force take-up system 6 comprises a rear cross member 7 of the motor vehicle 1, two side rear beams 8 , two force-absorbing brackets 9 and, in accordance with the invention, a member 10 for bending reinforcement of the rear crossmember 7. The force-absorbing system 6 is symmetrical with respect to a median longitudinal axis 11 of the vehicle automobile 1 oriented along the direction OX.
[60] La FIGURE 1 montre que la traverse arrière 7 du véhicule automobile 1 s’étend entre les deux bords latéraux 3 opposés du véhicule automobile 1, sur la quasi- totalité d’une largeur du véhicule automobile 1. La traverse arrière 7 du véhicule automobile 1 s’étend également entre le panneau arrière 4 du véhicule automobile 1 et la doublure 5 dudit panneau arrière 4, dans un espace 12 habituellement inexploité. La traverse arrière 7 comprend un corps 13 d’extension latérale et deux terminaisons latérales 14 opposées l’une à l’autre. [60] FIGURE 1 shows that the rear cross member 7 of the motor vehicle 1 extends between the two opposite side edges 3 of the motor vehicle 1, on the quasi- an entire width of the motor vehicle 1. The rear crossmember 7 of the motor vehicle 1 also extends between the rear panel 4 of the motor vehicle 1 and the lining 5 of said rear panel 4, in a space 12 that is usually unused. The rear crosspiece 7 comprises a body 13 of lateral extension and two lateral terminations 14 opposite to each other.
[61] La FIGURE 1 montre que chacun des deux longerons 8 arrière latéraux comprend une extrémité arrière 15 opposée à une extrémité avant 16. L’extrémité arrière 15 de chaque longeron 8 arrière latéral est solidaire de la terminaison latérale 14 de la traverse arrière 7 située en regard, par l’intermédiaire de l’équerre 9 de reprise d’effort fixée solidairement à la fois au longeron 8 arrière latéral et à la traverse arrière 7. [61] FIGURE 1 shows that each of the two lateral rear beams 8 comprises a rear end 15 opposite a front end 16. The rear end 15 of each lateral rear beam 8 is secured to the side termination 14 of the rear crossmember 7 located opposite, via the force take-up bracket 9 fixed integrally both to the lateral rear spar 8 and to the rear crossmember 7.
[62] La FIGURE 1 montre que l’organe 10 de renforcement s’étend le long de la traverse arrière 7 entre les deux terminaisons latérales 14 de ladite traverse arrière 7. [63] La FIGURE 2 illustre une vue schématique d’une partie du système de reprise d’effort 6 conforme au premier aspect de l’invention, prise au niveau de l’une des terminaisons latérales 14 de la traverse arrière 7. L’un des deux longerons 8 arrière latéraux, l’une des deux équerres 9 de reprise d’effort et une moitié 17 de l’organe 10 de renforcement en flexion de la traverse arrière 7 y sont représentés. On comprend qu’une partie opposée du système de reprise d’effort 6 conforme au premier aspect de l’invention, non représentée, est similaire, par symétrie. [62] FIGURE 1 shows that the reinforcing member 10 extends along the rear crossmember 7 between the two lateral terminations 14 of said rear crossmember 7. [63] FIGURE 2 illustrates a schematic view of a part of the force absorption system 6 in accordance with the first aspect of the invention, taken at the level of one of the side terminations 14 of the rear crossmember 7. One of the two side rear beams 8, one of the two brackets 9 for absorbing force and a half 17 of the member 10 for bending reinforcement of the rear crossmember 7 are shown there. It is understood that an opposite part of the force absorption system 6 in accordance with the first aspect of the invention, not shown, is similar, by symmetry.
[64] La FIGURE 2 montre que l’organe 10 de renforcement épouse par sa forme et ses dimensions le panneau arrière 4 et la doublure 5 du panneau arrière 4 du véhicule automobile 1. [65] La FIGURE 2 montre que l’organe 10 de renforcement comporte une pluralité de voiles de rigidification 18 qui s’étendent perpendiculairement à la traverse arrière 7 et sont traversés par la traverse arrière 7. Les voiles de rigidification 18 s’étendent selon un plan longitudinal du véhicule automobile 1. Les voiles de rigidification 18 sont régulièrement espacés les uns par rapport aux autres le long de la traverse arrière 7 par une pluralité d’entretoises 19 de l’organe 10 de renforcement séparant deux voiles de rigidification 18 adjacents. [66] Les FIGURES 3 et 4 illustrent deux vues rapprochées système de reprise d’effort 6 selon l’invention, pris au niveau de l’équerre 9 de reprise d’effort. Chacune des FIGURES 3 et 4 représente un exemple de réalisation de l’équerre 9 de reprise d’effort du système de reprise d’effort 6 selon l’invention. [64] FIGURE 2 shows that the reinforcing member 10 marries by its shape and dimensions the rear panel 4 and the lining 5 of the rear panel 4 of the motor vehicle 1. [65] FIGURE 2 shows that the member 10 reinforcement comprises a plurality of stiffening webs 18 which extend perpendicularly to the rear crossmember 7 and are crossed by the rear crossmember 7. The stiffening webs 18 extend along a longitudinal plane of the motor vehicle 1. The stiffening webs 18 are regularly spaced from each other along the rear crosspiece 7 by a plurality of spacers 19 of the reinforcing member 10 separating two adjacent stiffening webs 18 . [66] FIGURES 3 and 4 illustrate two close-up views of the force recovery system 6 according to the invention, taken at the level of the bracket 9 for force recovery. Each of FIGURES 3 and 4 represents an embodiment of the force-absorbing bracket 9 of the force-absorbing system 6 according to the invention.
[67] Les FIGURES 3 et 4 montrent que l’équerre 9 de reprise d’effort comprend une paroi horizontale 91 en appui contre le longeron 8 arrière latéral, une paroi verticale 92 en regard de la doublure 5 du panneau arrière 4 et une paroi avant 93 reliant la paroi horizontale 91 à la paroi verticale 92. L’équerre 9 de reprise d’effort comprend en outre une surface intérieure 94 opposée à une surface extérieure 95 située en arrière-plan des FIGURES 3 et 4. [67] FIGURES 3 and 4 show that the force-absorbing bracket 9 comprises a horizontal wall 91 resting against the lateral rear spar 8, a vertical wall 92 facing the lining 5 of the rear panel 4 and a wall front 93 connecting the horizontal wall 91 to the vertical wall 92. The force-absorbing bracket 9 further comprises an inner surface 94 opposite an outer surface 95 located in the background of FIGURES 3 and 4.
[68] Dans la FIGURE 3, l’équerre 9 de reprise d’effort a une dimension latérale plus étroite que celle de la FIGURE 4. Dans la FIGURE 3, l’équerre 9 de reprise d’effort a une dimension verticale plus grande que celle de la FIGURE 4. Dans la FIGURE 3, l’équerre 9 de reprise d’effort est en appui sur une feuillure 20 du longeron 8 arrière latéral. Plus particulièrement, la surface extérieure 95 de l’équerre 9 de reprise d’effort est en appui sur une feuillure 20 du longeron 8 arrière latéral. Dans la FIGURE 4, l’équerre 9 de reprise d’effort est en appui sur une face supérieure 21 du longeron 8 arrière latéral. Plus particulièrement, la paroi horizontale 91 de l’équerre 9 de reprise d’effort est en appui sur une face supérieure 21 du longeron 8 arrière latéral. [68] In FIGURE 3, the force-absorbing bracket 9 has a narrower lateral dimension than that of FIGURE 4. In FIGURE 3, the force-absorbing bracket 9 has a larger vertical dimension than that of FIGURE 4. In FIGURE 3, the force-absorbing bracket 9 rests on a rebate 20 of the lateral rear spar 8. More particularly, the outer surface 95 of the bracket 9 for taking up the force rests on a rebate 20 of the lateral rear spar 8. In FIGURE 4, the force take-up bracket 9 rests on an upper face 21 of the lateral rear spar 8. More particularly, the horizontal wall 91 of the bracket 9 for taking up the force rests on an upper face 21 of the lateral rear spar 8.
[69] La FIGURE 5 illustre une série de vues schématiques d’une partie du système de reprise d’effort 6 conforme au premier aspect de l’invention dans un premier mode de réalisation de l’invention, la partie du système de reprise d’effort 6 illustrée en FIGURE 5 étant prise au niveau de l’une des terminaisons latérales 14 de la traverse arrière 7. Un premier encart 501 de la FIGURE 5 représente le système de reprise d’effort 6 selon l’invention vu de face. Un deuxième encart 502 de la FIGURE 5 représente le système de reprise d’effort 6 selon l’invention vu de face. Un troisième encart 503 de la FIGURE 5 représente le système de reprise d’effort 6 selon l’invention en vue isométrique. [69] FIGURE 5 illustrates a series of schematic views of part of the force recovery system 6 according to the first aspect of the invention in a first embodiment of the invention, the part of the force recovery system force 6 illustrated in FIGURE 5 being taken at one of the side terminations 14 of the rear crossmember 7. A first insert 501 of FIGURE 5 shows the force absorption system 6 according to the invention seen from the front. A second insert 502 of FIGURE 5 represents the force absorption system 6 according to the invention seen from the front. A third insert 503 of FIGURE 5 represents the force absorption system 6 according to the invention in isometric view.
[70] Dans le mode de réalisation illustré en FIGURE 5, l’organe 10 de renforcement est rapporté sur la traverse arrière 7. L’organe 10 de renforcement est formé d’un matériau composite et la traverse arrière 7 est formée d’un tube métallique recourbé au niveau de la terminaisons latérales 14 par rapport au corps 13 rectiligne. [70] In the embodiment illustrated in FIGURE 5, the reinforcing member 10 is attached to the rear crossmember 7. The reinforcing member 10 is formed of a composite material and the rear crossmember 7 is formed of a metal pipe curved at the side terminations 14 relative to the body 13 rectilinear.
[71] Le premier encart 501 de la FIGURE 5 et le troisième encart 503 de la FIGURE 5, les voiles de rigidification 18 comportent toutes une ouverture 22 de passage au travers de laquelle la traverse arrière 7 est logée. Aussi, les voiles de rigidification 18 sont emmanchées sur la traverse arrière 7 et sont maintenus écartés les uns des autres par la pluralité d’entretoises 19 de l’organe 10 de renforcement. [71] The first insert 501 of FIGURE 5 and the third insert 503 of FIGURE 5, the stiffening webs 18 all have a passage opening 22 through which the rear crosspiece 7 is housed. Also, the stiffening sails 18 are fitted onto the rear crosspiece 7 and are held apart from each other by the plurality of spacers 19 of the member 10 of reinforcement.
[72] Le deuxième encart 502 de la FIGURE 5 et le troisième encart 503 de la FIGURE 5 montrent que la traverse arrière 7 est de forme cylindrique avec une section transverse de la traverse arrière 7 circulaire. [72] The second insert 502 of FIGURE 5 and the third insert 503 of FIGURE 5 show that the rear cross member 7 is cylindrical in shape with a cross section of the rear cross member 7 that is circular.
[73] Le deuxième encart 502 de la FIGURE 5 montre que l’organe 10 de renforcement comporte une patte de fixation 23 sur la traverse arrière 7. La patte de fixation 23 prend la forme d’une vis pointeau qui s’étend au travers de l’organe 10 de renforcement de manière à exercer un appui radial sur la traverse arrière 7. [73] The second inset 502 of FIGURE 5 shows that the reinforcing member 10 has a fixing lug 23 on the rear crossmember 7. The fixing lug 23 takes the form of a conical screw which extends through of the reinforcing member 10 so as to exert radial support on the rear crossmember 7.
[74] La FIGURE 6 illustre une série de vues schématiques d’une partie du système de reprise d’effort 6 conforme au premier aspect de l’invention dans un deuxième mode de réalisation de l’invention, la partie du système de reprise d’effort 6 illustrée en FIGURE 6 étant prise au niveau de l’une des terminaisons latérales 14 de la traverse arrière 7 comme pour la FIGURE 5. Un premier encart 601 de la FIGURE 6 représente le système de reprise d’effort 6 selon l’invention vu de face. Un deuxième encart 602 de la FIGURE 6 représente le système de reprise d’effort 6 selon l’invention vu de face. Un troisième encart 603 de la FIGURE 6 représente le système de reprise d’effort 6 selon l’invention en vue isométrique. [74] FIGURE 6 illustrates a series of schematic views of part of the force take-up system 6 according to the first aspect of the invention in a second embodiment of the invention, the part of the take-up system force 6 illustrated in FIGURE 6 being taken at the level of one of the lateral terminations 14 of the rear crossmember 7 as for FIGURE 5. A first insert 601 of FIGURE 6 represents the force recovery system 6 according to the invention seen from the front. A second insert 602 of FIGURE 6 represents the force absorption system 6 according to the invention seen from the front. A third insert 603 of FIGURE 6 represents the force absorption system 6 according to the invention in isometric view.
[75] Dans le mode de réalisation illustré en FIGURE 6, la traverse arrière 7 et l’organe 10 de renforcement sont issus de matière. L’organe 10 de renforcement et la traverse arrière 7 sont formés d’un matériau composite. La pluralité de voiles de rigidification 18 sont régulièrement espacés des entretoises 19. [75] In the embodiment illustrated in FIGURE 6, the rear crosspiece 7 and the reinforcing member 10 are made of material. The reinforcing member 10 and the rear crosspiece 7 are formed from a composite material. The plurality of stiffening webs 18 are regularly spaced from the spacers 19.
[76] Dans le mode de réalisation illustré en FIGURE 6, la traverse arrière 7 a une structure alvéolaire. [76] In the embodiment illustrated in FIGURE 6, the rear crosspiece 7 has a honeycomb structure.
[77] Le deuxième encart 602 de la FIGURE 6 et le troisième encart 603 de la FIGURE 6 montrent que la traverse arrière 7 est de forme cylindrique, une section transverse de la traverse arrière 7 polygonale du type d’un quadrilatère. [78] La FIGURE 7 illustre une mise en œuvre du système de reprise d’effort 6 conforme au premier aspect de l’invention. Le véhicule automobile 1 conforme au deuxième aspect de l’invention est soumis à un choc arrière, représenté par une première flèche 701. La traverse arrière 7 limite un déversement du panneau arrière 4 du véhicule automobile 1 vers l’avant du véhicule automobile 1. Au cours du choc, la traverse arrière 7 vient s’appuyer sur l’organe 10 de renforcement comme montré par les deuxièmes flèches 702, créant une voie d’effort transversale. Conformément à l’invention, l’organe 10 de renforcement va transférer les efforts sur les longerons 8 arrière latéraux comme illustré par les troisièmes flèches 703. Le système de reprise d’effort 6 conforme au premier aspect de l’invention forme ainsi un renfort structural du panneau arrière 4 et de la doublure 5 du panneau arrière 4 et limite toute intrusion lors du choc arrière au- delà de la traverse arrière 7, préservant tout élément en amont de la doublure 5 du panneau arrière 4 du véhicule automobile 1. [77] The second inset 602 of FIGURE 6 and the third inset 603 of FIGURE 6 show that the rear cross member 7 is cylindrical in shape, a cross section of the rear cross member 7 polygonal of the type of a quadrilateral. [78] FIGURE 7 illustrates an implementation of the stress relief system 6 according to the first aspect of the invention. The motor vehicle 1 in accordance with the second aspect of the invention is subjected to a rear impact, represented by a first arrow 701. The rear crossmember 7 limits an overturning of the rear panel 4 of the motor vehicle 1 towards the front of the motor vehicle 1. During the impact, the rear cross member 7 comes to rest on the reinforcing member 10 as shown by the second arrows 702, creating a transverse stress path. In accordance with the invention, the reinforcing member 10 will transfer the forces to the rear side rails 8 as illustrated by the third arrows 703. The force take-up system 6 according to the first aspect of the invention thus forms a reinforcement structure of the rear panel 4 and of the lining 5 of the rear panel 4 and limits any intrusion during the rear impact beyond the rear crossmember 7, preserving any element upstream of the lining 5 of the rear panel 4 of the motor vehicle 1.
[79] En synthèse, l’invention concerne un système de reprise d’effort 6 sur une partie basse arrière 2 d’un véhicule automobile 1. Le système de reprise d’effort 6 selon l’invention comporte une traverse arrière 7 du véhicule automobile 1 et deux longerons 8 arrière latéraux dont une extrémité arrière 15 de chaque longeron 8 arrière latéral est solidaire d’une terminaison latérale 14 de la traverse arrière 7 située en regard, par l’intermédiaire d’une équerre 9 de reprise d’effort fixée solidairement à la fois au longeron 8 arrière latéral et à la traverse arrière 7. Dans le véhicule automobile 1 équipé de l’invention, la traverse arrière 7 s’étend d’une part entre deux bords latéraux 3 opposés du véhicule automobile 1 et d’autre part entre un panneau arrière 4 du véhicule automobile 1 et une doublure 5 dudit panneau arrière 4. Conformément à l’invention, le système de reprise d’effort 6 comporte un organe 10 de renforcement en flexion de la traverse arrière 7, l’organe 10 de renforcement s’étendant le long de la traverse arrière 7 entre deux terminaisons latérales 14 de ladite traverse arrière 7. [79] In summary, the invention relates to a force take-up system 6 on a lower rear part 2 of a motor vehicle 1. The force take-up system 6 according to the invention comprises a rear crossmember 7 of the vehicle automobile 1 and two rear lateral beams 8 of which a rear end 15 of each rear lateral beam 8 is integral with a lateral termination 14 of the rear crossmember 7 located opposite, by means of a bracket 9 for taking up the force integrally fixed both to the lateral rear beam 8 and to the rear crossmember 7. In the motor vehicle 1 equipped with the invention, the rear crossmember 7 extends on the one hand between two opposite side edges 3 of the motor vehicle 1 and on the other hand between a rear panel 4 of the motor vehicle 1 and a lining 5 of said rear panel 4. In accordance with the invention, the force absorption system 6 comprises a member 10 for reinforcing the rear crossmember 7 in flexion, organ 10 of reinforcement ent extending along the rear crossmember 7 between two side terminations 14 of said rear crossmember 7.
[80] Bien sûr, l’invention n’est pas limitée aux exemples qui viennent d’être décrits et de nombreux aménagements peuvent être apportés à ces exemples sans sortir du cadre de l’invention. Notamment, les différentes caractéristiques, formes, variantes et modes de réalisation de l’invention peuvent être associées les unes avec les autres selon diverses combinaisons dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres. En particulier toutes les variantes et modes de réalisation décrits précédemment sont combinables entre eux. ! [80] Of course, the invention is not limited to the examples which have just been described and many adjustments can be made to these examples without departing from the scope of the invention. In particular, the different characteristics, forms, variants and embodiments of the invention may be associated with each other in various combinations insofar as they are not incompatible or mutually exclusive. In particular, all the variants and embodiments described above can be combined with each other. !

Claims

Revendications Claims
[Revendication 1] Système de reprise d’effort (6) sur une partie basse arrière (2) d’un véhicule automobile (1), le système de reprise d’effort (6) comportant : [Claim 1] Force take-up system (6) on a lower rear part (2) of a motor vehicle (1), the force take-up system (6) comprising:
- une traverse arrière (7) du véhicule automobile (1), la traverse arrière (7) étant destinée à s’étendre d’une part entre deux bords latéraux (3) opposés du véhicule automobile (1) et d’autre part entre un panneau arrière (4) du véhicule automobile (1) et une doublure (5) dudit panneau arrière (4) ; - a rear crossmember (7) of the motor vehicle (1), the rear crossmember (7) being intended to extend on the one hand between two opposite side edges (3) of the motor vehicle (1) and on the other hand between a rear panel (4) of the motor vehicle (1) and a lining (5) of said rear panel (4);
- deux longerons (8) arrière latéraux dont une extrémité arrière (15) de chaque longeron 8 arrière latéral est solidaire d’une terminaison latérale (14) de la traverse arrière (7) située en regard, par l’intermédiaire d’une équerre- two side rear beams (8) of which a rear end (15) of each side rear beam 8 is secured to a side termination (14) of the rear cross member (7) located opposite, by means of a bracket
(9) de reprise d’effort fixée solidairement au longeron (8) arrière latéral ; caractérisé en ce que le système de reprise d’effort (6) comporte un organe(9) force absorption fixed integrally to the side rear spar (8); characterized in that the force take-up system (6) comprises a member
(10) de renforcement en flexion de la traverse arrière (7), l’organe (10) de renforcement s’étendant le long de la traverse arrière (7) entre deux terminaisons latérales (14) de ladite traverse arrière (7). (10) for bending reinforcement of the rear crossmember (7), the reinforcing member (10) extending along the rear crossmember (7) between two lateral terminations (14) of said rear crossmember (7).
[Revendication 2] Système de reprise d’effort (6) selon la revendication 1 , dans lequel chaque équerre (9) de reprise d’effort est en appui sur une feuillure (20) du longeron (8) arrière latéral correspondant. [Claim 2] Force recovery system (6) according to claim 1, wherein each force recovery bracket (9) rests on a rabbet (20) of the corresponding rear lateral spar (8).
[Revendication 3] Système de reprise d’effort (6) selon la revendication 1 , dans lequel chaque équerre (9) de reprise d’effort est en appui sur une face supérieure (21) du longeron (8) arrière latéral correspondant. [Claim 3] Force-absorbing system (6) according to claim 1, in which each force-absorbing bracket (9) rests on an upper face (21) of the corresponding rear lateral beam (8).
[Revendication 4] Système de reprise d’effort (6) selon l’une quelconque des revendications précédentes, dans lequel le système de reprise d’effort (6) comporte un élément d’amortissement situé entre chaque équerre (9) de reprise d’effort et le panneau arrière (4). [Claim 4] Force take-up system (6) according to any one of the preceding claims, in which the force take-up system (6) comprises a damping element located between each bracket (9) for taking up effort and the rear panel (4).
[Revendication 5] Système de reprise d’effort (6) selon l’une quelconque des revendications précédentes, dans lequel l’organe (10) de renforcement comporte une pluralité de voiles de rigidification (18) qui s’étendent perpendiculairement à la traverse arrière (7). [Revendication 6] Système de reprise d’effort [Claim 5] Force-absorbing system (6) according to any one of the preceding claims, in which the reinforcing member (10) comprises a plurality of stiffening webs (18) which extend perpendicularly to the crosspiece back (7). [Claim 6] Force take-up system
(6) selon la revendication précédente, dans lequel l’organe (10) de renforcement comporte une pluralité d’entretoises (19), chaque entretoise (19) étant située entre deux voiles de rigidification (18) adjacents. (6) according to the preceding claim, in which the reinforcing member (10) comprises a plurality of spacers (19), each spacer (19) being located between two adjacent stiffening webs (18).
[Revendication 7] Système de reprise d’effort (6) selon l’une quelconque des revendications 5 ou 6, dans lequel l’organe (10) de renforcement présente au moins un voile de rigidification (18) en regard de chaque équerre (9) de reprise d’effort. [Claim 7] Force-absorbing system (6) according to any one of Claims 5 or 6, in which the reinforcing member (10) has at least one stiffening web (18) opposite each bracket ( 9) stress recovery.
[Revendication 8] Système de reprise d’effort (6) selon l’une quelconque des revendications 1 à 7, dans lequel la traverse arrière (7) et l’organe (10) de renforcement sont issus de matière. [Claim 8] Force-absorbing system (6) according to any one of Claims 1 to 7, in which the rear crosspiece (7) and the reinforcing member (10) are made of material.
[Revendication 9] Système de reprise d’effort (6) selon l’une quelconque des revendications 1 à 7, dans lequel l’organe (10) de renforcement est rapporté sur la traverse arrière (7), les voiles de rigidification (18) comportant toutes une ouverture (22) de passage au travers de laquelle la traverse arrière (7) est logée. [Claim 9] Force-absorbing system (6) according to any one of claims 1 to 7, in which the reinforcing member (10) is attached to the rear crosspiece (7), the stiffening webs (18 ) all having a passage opening (22) through which the rear crosspiece (7) is housed.
[Revendication 10] Véhicule automobile (1 ) comportant un système de reprise d’effort (6) selon l’une quelconque des revendications précédentes i [Claim 10] Motor vehicle (1) comprising a force absorption system (6) according to any one of the preceding claims i
PCT/FR2022/050646 2021-05-21 2022-04-07 Load-absorption system for reducing the load on a rear underbody of a motor vehicle WO2022243615A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2105362A FR3123038B1 (en) 2021-05-21 2021-05-21 Force take-up system on a lower rear part of a motor vehicle
FRFR2105362 2021-05-21

Publications (1)

Publication Number Publication Date
WO2022243615A1 true WO2022243615A1 (en) 2022-11-24

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ID=76730806

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Application Number Title Priority Date Filing Date
PCT/FR2022/050646 WO2022243615A1 (en) 2021-05-21 2022-04-07 Load-absorption system for reducing the load on a rear underbody of a motor vehicle

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FR (1) FR3123038B1 (en)
WO (1) WO2022243615A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2105362A5 (en) 1970-09-02 1972-04-28 Solvay COMPOSITIONS OF PLASTICS BASED ON POLYVINYL CHLORIDE AND CONTAINERS MADE FROM THESE COMPOSITIONS
JPS60259576A (en) * 1984-06-05 1985-12-21 Nissan Motor Co Ltd Rear chassis structure for automobile
KR20040024970A (en) * 2002-09-18 2004-03-24 현대자동차주식회사 Rear body combination structure of vehicle having tail gate
FR2932147B1 (en) 2008-06-10 2010-06-11 Renault Sas SYSTEM FOR REASSURING EFFORT ON THE LOWER PART OF THE REAR OF A VEHICLE
KR20180124230A (en) * 2017-05-11 2018-11-21 현대자동차주식회사 Rear end assembly for vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2105362A5 (en) 1970-09-02 1972-04-28 Solvay COMPOSITIONS OF PLASTICS BASED ON POLYVINYL CHLORIDE AND CONTAINERS MADE FROM THESE COMPOSITIONS
JPS60259576A (en) * 1984-06-05 1985-12-21 Nissan Motor Co Ltd Rear chassis structure for automobile
KR20040024970A (en) * 2002-09-18 2004-03-24 현대자동차주식회사 Rear body combination structure of vehicle having tail gate
FR2932147B1 (en) 2008-06-10 2010-06-11 Renault Sas SYSTEM FOR REASSURING EFFORT ON THE LOWER PART OF THE REAR OF A VEHICLE
KR20180124230A (en) * 2017-05-11 2018-11-21 현대자동차주식회사 Rear end assembly for vehicle

Also Published As

Publication number Publication date
FR3123038B1 (en) 2023-04-07
FR3123038A1 (en) 2022-11-25

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