Classifications

• • 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
  • B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D27/00—Connections between superstructure or understructure sub-units
  • B62D27/06—Connections between superstructure or understructure sub-units readily releasable
  • B62D27/065—Connections between superstructure or understructure sub-units readily releasable using screwthread

Definitions

• the invention concerns vehicles comprising a structure comprising spars to which a rear axle is secured, and more precisely the anchoring of this rear axle on these spars.
• Certain land vehicles generally of the automobile type, comprise, on the one hand, a structure comprising spars (or “spars”), right and left, and a crosspiece extending transversely between these spars, and on the other hand on the other hand, a rear axle secured in particular to these spars.
• the rear axle comprises two lateral parts which are secured by screwing respectively to fixing devices, themselves secured to support parts which are each secured to one of the external lateral faces of one of the two spars, at the longitudinal level where the crosspiece is installed.
• Such an arrangement requires a relatively large transverse space to accommodate the support part with its fixing device, which is not always possible. Furthermore, this arrangement does not offer complete satisfaction in terms of the quality of the anchoring of the lateral parts of the rear axle. Indeed, due to the shocks absorbed by the support parts, the latter may be subject to premature fatigue and/or partial separation of their host spar, which can cause local collapse of the rear axle.
• the invention therefore aims in particular to improve the situation.
• a land vehicle comprising a structure comprising:
• This land vehicle is characterized by the fact:
• each support part is secured to an internal lateral face of one of the spars, opposite its external lateral face, at the level of a corresponding interface part.
• each spar is inserted between a support part and an interface part, which makes it possible to significantly reinforce the anchoring of each support part and therefore the anchoring of each lower lateral part. of the rear axle.
• the land vehicle according to the invention may include other characteristics which can be taken separately or in combination, and in particular:
• each interface part may comprise a transverse end and two longitudinal wings secured respectively to the lower external face and lateral external face of the spar corresponding.
• each support part may comprise two longitudinal ends secured to the internal lateral face of the spar corresponding to the level of the longitudinal wings of the corresponding interface part;
• each support part can have a transverse section in the general shape of an L, and can comprise, on the one hand, a first wall fixedly secured to the internal lateral face of the spar corresponding to the level longitudinal wings of the corresponding interface part, and, on the other hand, a second wall extending substantially perpendicularly from this first wall while being installed substantially parallel to the lower external face of the corresponding spar and to which a corresponding fixing device is secured ;
• each support part can comprise at least one stamping defined partly on the first wall and partly on the second wall, and capable of reinforcing the holding of the second wall substantially perpendicularly to the first wall;
• each of the spars can have a generally U-shaped transverse section
• each support part can be fixedly secured by welding to the internal side face of the corresponding beam;
• each interface part can be fixedly joined by welding to the corresponding spar and to the corresponding end of the crosspiece;
• each fixing device may comprise, on the one hand, a fixing part secured to the corresponding support part, defining a housing in which a nut is fixedly installed, and comprising a first through hole located in the axis of a threaded hole of this nut, and, on the other hand, a spacer installed between the corresponding support piece and a lower internal face of the corresponding spar, opposite its lower external face, and comprising a second through hole located in the axis of this first through hole;
• each fixing part can comprise two clipping tabs passing through corresponding clipping holes defined in the corresponding support part, in order to achieve fixed attachment to the latter;
• FIG. 1 schematically illustrates, in a perspective view from below, part of an example of an embodiment of a base of a structure of a land vehicle according to the invention, to which a rear axle is attached,
• FIG. 2 schematically illustrates, in a perspective view from below, one of the ends of the crosspiece of Figure 1 coupled to one of the spars via an interface part,
• FIG. 3 schematically illustrates, in a perspective view from above, the coupling between the interface part of Figure 2 and one of the spars and the coupling between the latter and the support part to which a fixing device is secured ,
• FIG. 4 schematically illustrates, in a sectional view in a transverse and vertical plane, the coupling between one of the ends of the crosspiece of Figure 2 and one of the longitudinal members via the interface part, and the coupling between this spar and the support part to which a fixing device is secured.
• the invention aims in particular to propose a land vehicle VT comprising a structure SV comprising a base to which a rear axle TR is secured.
• the land vehicle VT is of the automobile type. This is for example a car, as illustrated non-limitatively and partially in Figure 1. But the invention is not limited to this type of vehicle. It concerns any land vehicle comprising a structure comprising a base to which a rear axle is attached.
• FIG. 1 a part of an exemplary embodiment of a base of an SV structure of a land vehicle VT according to the invention, to which a rear axle TR is secured.
• this base of the structure SV notably comprises spars (or spars) LS, right and left, extending in the longitudinal direction X, and a crosspiece TS extending transversely (in the transverse direction Y). between these LS spars.
• each of the LS spars can have a transverse section in the general shape of a U.
• each LS spar comprises a lower wall extended on both sides. another upwards by an internal side wall and an external side wall. This allows for easier installation inside each LS spar a support piece PS with its fixing device DF, as will be understood later.
• each LS spar could have a transverse section of a general shape other than a U.
• internal side wall is meant a first side wall of a spar LS oriented towards one end of the crosspiece TS, and by “external side wall” a second side wall of this same spar LS oriented towards the exterior of the vehicle, and substantially parallel to its internal side wall (at +/- 5°).
• the structure SV also includes two right and left PI interface parts, each secured to one of the two opposite ends of the crosspiece TS.
• each PI interface part is also secured to a lower external face FEI and a lateral external face FEL of one of the LS beams.
• each spar LS Attached to each spar LS is a support piece PS to which a fixing device DF is attached.
• Two (lower lateral) parts PL of the rear axle TR are secured respectively to the two fixing devices DF.
• the latter (DF) serve as a fixing point for the two (lower lateral) parts PL, which allows the two support parts PS to serve as anchors for the latter (PL).
• each of them is advantageously secured to a lateral internal face FIL of one of the longitudinal members LS, opposite its lateral external face FEL, at the level of a corresponding PI interface part.
• each spar LS is inserted between a support part PS and an interface part PI, while being fixedly secured to the latter (PS, PI), which amounts to saying that each support part PS is fixedly attached to the corresponding interface part PI (via this spar LS).
• This makes it possible to significantly strengthen the anchoring of each piece of support PS and therefore the anchoring of each lower lateral part PL of the rear axle TR.
• the risk of premature fatigue and/or partial separation of the LS spar from a support part is therefore significantly reduced, as is the risk of local collapse of the TR rear axle.
• each PS support part is now housed with its DF fixing device inside an LS spar, there is no longer any problem of transverse bulk.
• inter face a face of a wall of a spar LS which is oriented towards the inside of this spar LS
• external face a face of this same wall which is oriented towards the exterior of this LS spar, and therefore opposite the internal face of this wall.
• lower face means a face of a lower wall of an LS spar, that is to say that which is located at the lowest level of this LS spar.
• lateral face means a face of a side wall of a spar LS, that is to say oriented towards one end of the crosspiece TS (in the case of an internal wall) or towards the exterior of the vehicle (in the case of an external wall).
• each interface part PI can comprise a transverse end ET and two longitudinal wings AL.
• the transverse end ET is secured to the lower external face FEI (of the lower wall) of a spar LS and the two longitudinal wings AL are secured to the lateral external face FEL (of the internal side wall) of this same LS spar.
• each support part PS comprises two longitudinal ends EL which are secured to the internal lateral face FIL (of the internal side wall) of this same spar LS respectively at the level of the two longitudinal wings AL of the corresponding interface part PI .
• each support piece PS can have a transverse section in the general shape of L, and can comprise first P1 and second P2 walls which extend mutually.
• first wall P1 is fixedly secured to the internal lateral face FIL (of the internal side wall) of a spar LS corresponding to the level of the two longitudinal wings AL of the corresponding interface part PI.
• the second wall P2 extends substantially perpendicularly the first wall P1 by being installed substantially parallel to the lower external face FEI of the corresponding spar LS and to which a corresponding fixing device DF is secured.
• each PS support piece constitutes a kind of angle, which makes it possible to reinforce its rigidity.
• each support part PS can comprise at least one stamping ER defined partly on the first wall P1 and partly on the second wall P2.
• Each stamping ER is capable of reinforcing the maintenance of the second wall P2 substantially perpendicular to the first wall P1. This makes it possible to further reinforce the rigidity of each PS support part.
• each support piece PS can be fixedly secured by welding to the internal lateral face FIL (of the internal side wall) of the corresponding spar LS. But this is not obligatory. Indeed, we could consider a fixed connection by screwing.
• each PI interface part can be fixedly secured by welding, on the one hand, to the corresponding LS spar (and more precisely here to the external lateral face FEL of its internal side wall and to the external face inferior FEI of its lower wall), and, on the other hand, at the corresponding end of the crosspiece TS. But this is not obligatory. Indeed, we could consider a fixed connection by screwing.
• each fixing device DF can comprise a fixing part PF, a nut EF and a spacer EN.
• the fixing part PF is secured to the corresponding support part PS, defines a housing in which the nut EF is fixedly installed, and comprises a first through hole TT1 which is located in the axis of a threaded hole of this EF nut (see figure 4).
• the EN spacer is installed between the corresponding PS support piece and the lower internal face Fil (of the lower wall) of the corresponding LS spar, opposite its lower external face FEI.
• this spacer EN comprises a second through hole TT2 which is located in the axis of the first through hole TT1 to allow the passage of a bolt (or a screw) for fixing a lower lateral part PL of the train rear TR (see figures 2 and 4).
• each fixing part PF can comprise two clipping lugs PC which pass through corresponding clipping holes TC defined in the corresponding support part PS, in order to carry out the fixed connection to the latter (PS).
• PS fixed connection to the latter

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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)
• Vehicle Body Suspensions (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=87554714

Family Applications (1)

Country Status (3)

Family Cites Families (5)

• 2022
  • 2022-12-15 FR FR2213460A patent/FR3143524A1/fr active Pending
• 2023
  • 2023-11-29 WO PCT/FR2023/051868 patent/WO2024126917A1/fr not_active Ceased
  • 2023-11-29 EP EP23825425.4A patent/EP4634041A1/de active Pending

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