WO2022243613A1 - Dispositif de renfort de train arriere de vehicule, notamment automobile. - Google Patents
Dispositif de renfort de train arriere de vehicule, notamment automobile. Download PDFInfo
- Publication number
- WO2022243613A1 WO2022243613A1 PCT/FR2022/050533 FR2022050533W WO2022243613A1 WO 2022243613 A1 WO2022243613 A1 WO 2022243613A1 FR 2022050533 W FR2022050533 W FR 2022050533W WO 2022243613 A1 WO2022243613 A1 WO 2022243613A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vehicle
- reinforcing
- crosspiece
- floor
- extends
- Prior art date
Links
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 52
- 239000002828 fuel tank Substances 0.000 claims abstract description 26
- 230000002787 reinforcement Effects 0.000 claims description 28
- 239000010959 steel Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 235000004522 Pentaglottis sempervirens Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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
-
- 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
- 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
- B62D21/155—Sub-frames or underguards
Definitions
- TITLE VEHICLE REAR END REINFORCEMENT DEVICE, PARTICULARLY AUTOMOTIVE
- the invention relates to the environment of the automobile industry. More particularly, the invention relates to a device for reinforcing the rear axle of a vehicle, in particular a motor vehicle, to preserve a fuel tank in the event of a rear impact.
- Some hybrid vehicles have an electric motor (or electric machine) located at the rear of the vehicle.
- This electric motor is fixed in a protective cradle placed near the fuel tank.
- the cradle does not bend to protect the electric motor and the energy of the impact is transmitted to the elements of the vehicle which are integral with the cradle.
- the invention aims to better control the transmission of the energy caused by the impact in order to avoid any impact between the cradle and the fuel tank.
- Document FR3011800 discloses a chassis structure for a thermal or electric motor vehicle which aims to control the forces due to a frontal impact of the vehicle so that the chassis has a capacity to better absorb shocks without deforming.
- the frame structure comprises a rigid metal cross between two adjacent crosspieces.
- Document FR2955077 also discloses another technical solution aimed at controlling the forces in the event of a frontal impact, which consists in providing an elongated reinforcing element close to the tunnel of the vehicle, which tunnel is provided in particular to house the battery.
- the solutions presented in these documents are not designed to control the forces in the event of a rear impact of the vehicle.
- the invention therefore aims to propose a solution which is implemented at the rear of hybrid vehicles whose electric motor is received in a cradle.
- the invention relates to a device for reinforcing the rear axle of a vehicle, in particular a motor vehicle, said rear axle of a vehicle comprising an electric motor and a fuel tank comprising a concavity capable of giving passage to an exhaust duct and which is extends in a longitudinal direction of the vehicle, said vehicle comprising a vehicle floor, said reinforcement device comprising a cradle comprising two arms between which said electric motor can be received.
- the reinforcement device is remarkable in that it comprises an elongate reinforcement element which extends in a direction perpendicular to the two arms from one of the two arms at its center, said elongate reinforcement element being capable of extending above said floor of said vehicle and in said concavity of said fuel tank, the slender reinforcing element having a length of element and a receiving housing which extends over the entire length of said element to provide passage to said duct exhaust.
- the presence of the slender reinforcing element makes it possible to unload the thrust on the rear axle of the vehicle by channeling the forces towards the floor.
- the slender reinforcement element makes it possible to stiffen the survival space of the fuel tank, while maintaining the volume of the vehicle dedicated to receiving the fuel tank (the bulk dedicated to the tank is not modified thanks to invention).
- the invention thus conceived offers an additional solution to existing vehicles which comprises a rear secondary motorization, providing additional protection making it possible to secure the fuel tank.
- the reinforcement device may also include the following characteristics:
- the slender reinforcing element can be a hollow half-tube. According to other embodiments, there may be provided an elongate reinforcing element comprising a hollow tube, of circular section, or polygonal or other;
- Said slender reinforcing element can be made in one piece with said cradle. According to another variant, it can also comprise two separate elements (cradle and slender reinforcing element), subsequently associated together, for example by spot welding.
- the invention also relates to a vehicle, in particular a motor vehicle, comprising a vehicle rear axle comprising an electric motor and a fuel tank comprising a concavity able to provide passage for an exhaust duct, said concavity extending in a longitudinal direction of the vehicle, said vehicle comprising a vehicle floor and a cradle for protecting said electric motor, said cradle comprising two arms which each extend in a direction transverse to said longitudinal direction of said vehicle, said electric motor being received between the two said arms of the cradle.
- a motor vehicle comprising a vehicle rear axle comprising an electric motor and a fuel tank comprising a concavity able to provide passage for an exhaust duct, said concavity extending in a longitudinal direction of the vehicle, said vehicle comprising a vehicle floor and a cradle for protecting said electric motor, said cradle comprising two arms which each extend in a direction transverse to said longitudinal direction of said vehicle, said electric motor being received between the two said arms of the cradle
- the vehicle according to the invention is remarkable in that it comprises a reinforcement device as defined above, comprising said slender reinforcing element which is received in said concavity of said tank and which extends to above said floor, said slender reinforcing element receiving said exhaust duct.
- the passage of the reinforcing element does not reduce the volume of the fuel tank because the latter is already designed to give passage to the exhaust duct of the vehicle.
- the slender reinforcing element struts the center of the rear axle (being associated with the center of an arm of the cradle), which is the most effective place to limit its recoil in the event of a rear impact of the vehicle.
- the vehicle in accordance with the invention may also comprise the following characteristics, taken separately or in combination (according to different levels of reinforcement that one wishes to bring to a vehicle):
- the vehicle may comprise a reinforcing crosspiece which extends in a direction transverse to said longitudinal direction of said vehicle, said crosspiece being fixed to said vehicle floor and comprising at its center a U-shaped reinforcing strap, surrounding said element of slender reinforcement at the entrance to a tunnel formed in said floor, said crosspiece further comprising at least one fixing lug in said tunnel, - the crosspiece may comprise a continuous central part which extends above said rider, or, as a variant, the crosspiece may comprise two aligned parts separated by a central space, the two said aligned parts being linked by the said jumper,
- said crosspiece may comprise at least one reinforcing sole which extends at least partially over one face of said crosspiece,
- the vehicle may comprise at least two reinforcement bars on said floor which each extend in a direction parallel to the longitudinal direction of said vehicle from the ends of said crossbeam, - the vehicle may also comprise a heel board and a reinforcement support on said heel board, said support reinforcement comprising a cutout to at least partially accommodate said rider.
- FIG. 1 is a perspective view which illustrates certain elements of a vehicle rear axle according to the invention, comprising a reinforcement device according to the invention,
- FIG. 2 is a bird's eye view which illustrates in perspective certain elements shown in figure 1, seen from another angle,
- FIG. 3 is a perspective view of a reinforcement device according to the invention, shown alone, [Fig. 4] and a top and perspective view of an element of the device shown in FIG. 3, associated with another vehicle element according to the invention,
- FIG. 5 is a view from below and in perspective of an element of the device shown in FIG. 4, associated with a third element of the vehicle according to the invention,
- FIG. 6 is a schematic view of an alternative embodiment of the additional element shown in FIG. 4, and
- FIG. 7 is a perspective and side view of yet another element that a vehicle according to the invention may include.
- FIG. 1 shows certain elements of a rear axle of a motor vehicle according to the invention, the motor vehicle being an electric or hybrid vehicle.
- the motor vehicle being an electric or hybrid vehicle.
- the vehicle according to the invention extends in a longitudinal direction L.
- the axis of the wheels of the vehicle extends in a transverse direction T, secant to the longitudinal direction L and, in the example illustrated and concerning in particular the axis of the wheels, the transverse direction T is perpendicular or substantially perpendicular to the longitudinal direction L.
- the rear axle of the vehicle comprises an electric motor 1 (or electric machine) and a fuel tank 2.
- the electric motor 1 is positioned between the rear wheels.
- the left part of the figure is defined as being the front part and the right part of the figure as the rear part.
- An element placed in front of a second element will therefore be represented to the left of the second element in figure 1.
- the fuel tank 2 is positioned in front of the electric motor 1 (therefore in front of the electric motor) in figure 1.
- the fuel tank 2 has an elongated shape, which extends in a transverse direction T1. It comprises, on the top, a concavity 3 which extends in a direction parallel to the longitudinal direction L of the vehicle.
- This concavity 3 is capable of giving passage to an exhaust duct (reference 7 in FIG. 1), that is to say that the concavity is wide enough and deep enough to accommodate the exhaust duct.
- the vehicle also comprises a vehicle floor 4, visible in Figures 1 and 2. The floor 4 is located in front of the fuel tank 2.
- the vehicle comprises a reinforcement device making it possible both to protect the electric motor 1 in the event of a rear impact of the vehicle, and to protect the fuel tank:
- the reinforcement device thus comprises a cradle 5 which comprises two arms 50 and 51 of the cradle, the two arms 50 and 51 extending substantially in planes oriented along transverse directions and substantially parallel to each other.
- the electric motor 1 is received in the cradle 5, between the two arms 50 and 51.
- the reinforcement device also comprises an elongated reinforcement element 6 which extends along the longitudinal direction L of the vehicle, perpendicular to the two arms 50 and 51 of the cradle 5.
- the slender reinforcing element 6 is a hollow half-tube which can be seen in particular in FIG. 3.
- the slender reinforcing element 6 could however have another shape without departing from the scope of the invention: it could comprise a hollow tubular element, of round, polygonal or other section (i.e. any shape or shape complementary to another, etc.), as long as it allows the duct to be accommodated exhaust 7 of the vehicle: indeed; the concavity of the fuel tank existed before the invention to allow the passage of the exhaust duct.
- the slender reinforcing element makes it possible to retain the position of the exhaust duct.
- the slender reinforcing element 6 of the reinforcing device according to the invention thus comprises a receiving housing capable of giving passage to the exhaust duct 7.
- the slender reinforcing element thus makes it possible to direct the forces generated by a rear impact towards the floor, above the tank but not on the tank so as to preserve it.
- the slender reinforcing element 6 made of a half-tube facilitates the introduction of said exhaust duct 7.
- the slender reinforcing element 6 can be made in one piece with said cradle. It could also be produced independently of the cradle 5 and subsequently attached to the cradle 5.
- the front arm 50 of the cradle 5 comprises, substantially in its middle (that is to say in its middle or approximately in its middle) a through opening 52 of cylindrical shape, through which the end of the exhaust duct can pass.
- the opening 52 can accommodate one end of the slender reinforcing element 6 or else the end of the slender reinforcing element 6 can be secured at least partially around the opening 52 on the arm 50 of the cradle 5.
- the vehicle also comprises a reinforcing crosspiece 8, which extends in a transverse direction T2 with respect to said direction longitudinal L of said vehicle and which is fixed to the floor 4 of the vehicle.
- the slender reinforcing element 6 bears punctually on the crosspiece 8, thus transmitting to it the forces received by the reinforcing device during a rear impact of the vehicle.
- the crosspiece 8 may comprise a single transverse element which extends in a transverse direction T2 between two ends 80 and 81 of the crosspiece (FIG. 4 or 5), or else two parts of the crosspieces 82 and 83, which are aligned and which are separated by a central space 84 (FIG. 6).
- the crosspiece 8 includes a U-shaped reinforcing rider (reference 9), in the central part of the crosspiece.
- reference 9 In the example where the crosspiece 8 comprises a single transverse element
- crosspiece 8 comprises two aligned crosspiece parts 82 and 83
- said jumper 9 binds the two aligned parts.
- the rider 9 of the crosspiece 8 surrounds the slender reinforcing element 6.
- the floor 4 comprises a tunnel 10 (see figure 2) and the rider 9 is fixed at the entrance to the tunnel 10 made in said floor 4.
- the crosspiece 8 further comprises two fixing lugs 11 which are fixed in said tunnel 10.
- Each fixing lug 11 can be made of stamped or bent sheet metal.
- the crosspiece 8 can also be made of stamped or bent sheet metal.
- it can be made of FB60 steel with a thickness of 1.5 mm.
- the rider can be made of steel or light alloy, with a thickness of 2 mm.
- the crosspiece 8 may also include at least one reinforcing plate 85 which extends at least partially on one side of said crosspiece: in the context of the example shown in Figure 5, the crosspiece 8 comprises two soles which each extend over the face of the crosspiece 8 which is oriented in the same direction as the rider 9 (i.e., downwards so that the sole 85 is pinched between the crosspiece and the floor 4).
- the sole(s) can be made of DP780 steel with a thickness of 1.3 mm.
- the vehicle according to the invention may also comprise two reinforcing bars 12, which each extend in a direction parallel to the longitudinal direction of said vehicle from the ends of said crosspiece (therefore perpendicular to the crosspiece 8) and which are also fixed on said floor (for example, by spot welding).
- the bars 12 are, for example, made by profiles whose section is U-shaped, which allows to fix the bars on a projecting part of the floor of rectangular section, called stretcher .
- Each bar could also have two associated elements, each having an L shape.
- the arms 12 are made of FB60 steel with a thickness of 2 mm.
- the ends of the reinforcing bars 12 rest or are fixed on the ends 80 and 81 of the crosspiece, to also dissipate the effects of a possible rear impact on the floor of the vehicle. It is also planned to equip the vehicle according to the invention with a support reinforcement 13 on a heel board of the vehicle, in the case of a vehicle equipped with a heel board (see figure 7), said support reinforcement 13 comprising a central cutout 14 to accommodate at least partially the rider 9.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22717855.5A EP4341149A1 (fr) | 2021-05-20 | 2022-03-23 | Dispositif de renfort de train arriere de vehicule, notamment automobile |
US18/559,202 US20240246609A1 (en) | 2021-05-20 | 2022-03-23 | Device for reinforcing a rear axle of a vehicle, in particular a motor vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2105257A FR3123044B1 (fr) | 2021-05-20 | 2021-05-20 | Dispositif de renfort de train arriere de vehicule, notamment automobile |
FR2105257 | 2021-05-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022243613A1 true WO2022243613A1 (fr) | 2022-11-24 |
Family
ID=76375310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2022/050533 WO2022243613A1 (fr) | 2021-05-20 | 2022-03-23 | Dispositif de renfort de train arriere de vehicule, notamment automobile. |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240246609A1 (fr) |
EP (1) | EP4341149A1 (fr) |
FR (1) | FR3123044B1 (fr) |
WO (1) | WO2022243613A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2105257A1 (fr) | 1970-09-04 | 1972-04-28 | Hewlett Packard Co | |
JP2010247622A (ja) * | 2009-04-14 | 2010-11-04 | Honda Motor Co Ltd | 自動車の後部車体構造 |
FR2955077A1 (fr) | 2010-01-12 | 2011-07-15 | Peugeot Citroen Automobiles Sa | Vehicule dote d'un plancher apte a recevoir une batterie et une poutre de renforcement |
WO2011135221A1 (fr) * | 2010-04-29 | 2011-11-03 | Peugeot Citroën Automobiles SA | Chassis pour un vehicule hybride, formant un cadre |
FR3011800A1 (fr) | 2013-10-14 | 2015-04-17 | Renault Sa | Structure de chassis pour vehicule automobile thermique ou electrique |
US20190276093A1 (en) * | 2018-03-09 | 2019-09-12 | Honda Motor Co., Ltd. | Vehicle rear structure |
-
2021
- 2021-05-20 FR FR2105257A patent/FR3123044B1/fr active Active
-
2022
- 2022-03-23 EP EP22717855.5A patent/EP4341149A1/fr active Pending
- 2022-03-23 WO PCT/FR2022/050533 patent/WO2022243613A1/fr active Application Filing
- 2022-03-23 US US18/559,202 patent/US20240246609A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2105257A1 (fr) | 1970-09-04 | 1972-04-28 | Hewlett Packard Co | |
JP2010247622A (ja) * | 2009-04-14 | 2010-11-04 | Honda Motor Co Ltd | 自動車の後部車体構造 |
FR2955077A1 (fr) | 2010-01-12 | 2011-07-15 | Peugeot Citroen Automobiles Sa | Vehicule dote d'un plancher apte a recevoir une batterie et une poutre de renforcement |
WO2011135221A1 (fr) * | 2010-04-29 | 2011-11-03 | Peugeot Citroën Automobiles SA | Chassis pour un vehicule hybride, formant un cadre |
FR3011800A1 (fr) | 2013-10-14 | 2015-04-17 | Renault Sa | Structure de chassis pour vehicule automobile thermique ou electrique |
US20190276093A1 (en) * | 2018-03-09 | 2019-09-12 | Honda Motor Co., Ltd. | Vehicle rear structure |
Also Published As
Publication number | Publication date |
---|---|
FR3123044A1 (fr) | 2022-11-25 |
EP4341149A1 (fr) | 2024-03-27 |
US20240246609A1 (en) | 2024-07-25 |
FR3123044B1 (fr) | 2024-04-12 |
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