Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
  • B62D25/20—Floors or bottom sub-units
  • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
  • B62D25/2027—Floors or bottom sub-units in connection with other superstructure subunits the subunits being rear structures

Definitions

• the present invention claims priority from French application 2208232 filed on August 10, 2022, the content of which (text, drawings and claims) is here incorporated by reference.
• the invention relates to land vehicles comprising a structure comprising a rear crossmember to which at least one element (possibly structural) must be secured.
• Certain vehicles generally of the automobile type, comprise a structure (or platform) comprising a rear floor located in front of a load floor, and a rear crossmember (sometimes called “crossmember closure”) fixedly secured to the rear floor and to the floor dump.
• the rear floor generally supports the rear seat of the vehicle and extends towards the rear a heel board of the structure, and the load floor generally delimits part of the rear trunk of the vehicle.
• the rear crossmember comprises a lower wall (oriented towards the ground) which serves as an anchoring (or securing) zone for at least one element of the vehicle which depends on the motorization of the latter.
• the lower wall of the rear crossmember serves as an anchoring zone for at least one fixing part of a fuel tank (case of a thermal GMP or hybrid) or for two internal spars of the structure (case of an electric GMP). It is recalled that these two internal spars are generally used to reinforce the structure and allow the fixing of a rear part a main (or traction) battery providing electrical energy for an electric driving machine of the GMP.
• the invention therefore aims in particular to improve the situation. Presentation of the invention
• a rear crossmember on the one hand, suitable for forming part of a structure of a land vehicle, this structure comprising a rear floor located in front of a load floor, and, on the other hand part, suitable for being fixedly attached to the rear floor and to the load floor.
• This rear crosspiece is characterized by the fact that it comprises a lower wall arranged so as to allow connection either of at least one fixing part of a fuel tank of the land vehicle, or of two internal longitudinal members of the structure.
• the rear crossmember according to the invention may include other characteristics which can be taken separately or in combination, and in particular:
• its lower wall may comprise two reinforcing stampings spaced transversely, and adapted to be oriented so as to project downwards and to allow the joining of a fixing part of the fuel tank or of an internal spar ;
• At least one of the stampings may comprise a through hole capable of being traversed by a screw intended to ensure attachment by screwing of a fixing part of the fuel tank;
• the invention also proposes a land vehicle comprising a structure comprising, on the one hand, a rear floor located in front of a load floor, and, on the other hand, a rear crossmember of the type presented above and fixedly attached to the rear floor and the load floor.
• the land vehicle according to the invention may include other characteristics which can be taken separately or in combination, and in particular:
• - it may comprise a fuel tank fixedly secured to the lower wall of the rear crossmember by at least one fixing part associated with a screw;
• its fuel tank can be fixedly secured to the lower wall of the rear crossmember by two fixing parts associated respectively with two screws;
• a battery capable of supplying electrical energy for an electric motor of a powertrain (or GMP) and fixedly secured by screwing to the internal longitudinal members;
• FIG. 1 schematically illustrates, in a bottom view, part of a first example of land vehicle structure comprising a first embodiment of a rear crossmember according to the invention adapted to a thermal GMP,
• FIG. 2 schematically illustrates, in a bottom view, the lower wall of the rear crossmember of Figure 1, before its integration into a thermal GMP vehicle structure
• FIG. 3 schematically illustrates, in a bottom view, part of a second example of land vehicle structure comprising a second example of production of a rear crossmember according to the invention adapted to a hybrid GMP,
• FIG. 4 schematically illustrates, in a bottom view, the lower wall of the rear crossmember of Figure 3, before its integration into a hybrid GMP vehicle structure
• FIG. 5 schematically illustrates, in a bottom view, part of a third example of land vehicle structure comprising a third example of production of a rear crossmember according to the invention adapted to an electric GMP, and
• FIG. 6 schematically illustrates, in a bottom view, the lower wall of the rear crossmember of Figure 5, before its integration into an electric GMP vehicle structure.
• the invention aims in particular to propose a rear crossmember (or crossmember closure) TR intended to be part of an SV structure of a land vehicle V and adapted to the different engines that this vehicle V may include.
• the land vehicle V is of the automobile type. This is for example a car. But the invention is not limited to this type of vehicle. It concerns in fact any land vehicle comprising a structure comprising a rear crossmember (or crossmember closure) serving as a anchoring (or securing) zone for at least one element of the vehicle which depends on the engine of the latter.
• FIG. 1 We have schematically illustrated in Figures 1, 3 and 5, three examples of embodiment of parts of a (land) vehicle SV structure V comprising a rear crossmember (or crossmember closure) TR according to the invention.
• This vehicle V has a structure which can be associated with different powertrains (or GMPs), namely a purely thermal GMP, a hybrid GMP (thermal and electric) and a purely electric GMP.
• GMPs powertrains
• vehicle V partially illustrated in Figure 1 has a purely thermal GMP
• vehicle V partially illustrated in Figure 3 has a hybrid GMP and a dynamic rear axle
• vehicle V partially illustrated in Figure 5 has a purely electric GMP.
• the structure SV of a vehicle V comprises in particular a rear crossmember (or crossmember closure) TR, a rear floor PR and a load floor PC.
• the rear floor PR generally supports the rear seat of the vehicle V, is fixedly secured to the rear crossmember TR, and extends towards the rear a heel board (not shown) which is a structural element extending towards the rear a front floor (not shown).
• the heel board comprises a rear transverse part defining a crosspiece (and therefore extending in the transverse direction Y), and against which the heels of the rear passengers of vehicle V can rest.
• the load floor PC is located behind the rear floor PR, fixedly secured to the rear crossmember TR, and partly delimits the rear trunk of the vehicle V.
• the rear cross member TR is capable of being fixedly secured to two right and left external longitudinal members (not shown) and to the lower faces of the front part of the load floor PC and the rear part of the rear floor PR. It comprises a main part (not visible in the figures), for example having a section in the general shape of an inverted U, and a lower wall PI fixedly secured by welding to the main part, closing the cavity delimited by the latter, and intended to be oriented towards the ground once installed in the vehicle V.
• This lower wall PI is arranged so as to allow the joining of either at least one fixing part PF of an RC fuel tank of the land vehicle V ( Figures 1 to 4, case of thermal and hybrid GMPs), or two internal spars Ll of the SV structure (figures 5 and 6, case of electric GMP).
• each PF fixing part can, for example, pass under a part of the RC fuel tank associated with a thermal or hybrid GMP, and comprise ends secured by screwing to the lower wall PI and to the RC fuel tank or to another element of the SV structure (for example the heel board).
• the two internal spars Ll are fixedly secured to the rear cross member TR and to the heel board between the two external spars. They are also fixedly attached to the underside of the rear floor PR.
• these two internal spars Ll can be used to reinforce the SV structure and allow the fixed connection by screwing of a rear part of a battery capable of supplying electrical energy for an electric driving machine of an electric GMP of the vehicle V.
• the lower wall PI can comprise two reinforcing stampings ER which are spaced transversely, and adapted to be oriented so as to project downwards.
• each reinforcement stamping ER which constitutes a concave zone, is suitable for allowing the joining of a fixing part PF (figures 1 to 4) of a fuel tank RC or of an internal spar Ll ( figures 5 and 6).
• At least one of the reinforcement stampings ER can comprise a through hole TT which is specific to be crossed by a screw intended to ensure the securing by screwing of a PF fixing part of the RC fuel tank.
• a through hole TT which is specific to be crossed by a screw intended to ensure the securing by screwing of a PF fixing part of the RC fuel tank.
• each of the two reinforcement stampings ER includes a through hole TT because the fuel tank RC is held under the rear wall PR by two fixing parts PF screwed to the bottom wall PI via the two through holes TT.
• each through hole TT is now made when necessary, and therefore to accommodate a screw, which advantageously avoids having to close holes when they are not used to ensure the sealing of a TR rear crossmember. This saves time, reduces the diversity and complexity of inventory management, and therefore reduces vehicle costs.
• At least one of the ER reinforcement stampings can comprise a flat lower face suitable for allowing the joining by welding of a internal spar Ll.
• the two ER reinforcement stampings comprise a flat lower face suitable for allowing the joining by welding of a internal spar Ll. In this case, there is no through hole TT to make in an ER reinforcement stamping.
• thermo GMP but it could also be a hybrid GMP associated with a multi-link type rear axle
• the two ER reinforcement stampings have also a flat lower face and only the lower face of one of them (ER) comprises a through hole TT.
• the two ER reinforcement stampings also have a flat lower face, and the two lower faces each comprise a through hole TT.
• the invention makes it possible to reduce assembly time, production costs, logistics, and the number of additional parts or elements necessary for the couplings.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Body Structure For Vehicles (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=83506191

Family Applications (1)

Country Status (3)

Family Cites Families (4)

• 2022
  • 2022-08-10 FR FR2208232A patent/FR3138803B1/fr active Active
• 2023
  • 2023-07-10 EP EP23751673.7A patent/EP4568873A1/de active Pending
  • 2023-07-10 WO PCT/FR2023/051069 patent/WO2024033580A1/fr not_active Ceased

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