EP4251476A1 - Dispositif absorbeur d'energie - Google Patents
Dispositif absorbeur d'energieInfo
- Publication number
- EP4251476A1 EP4251476A1 EP21786235.8A EP21786235A EP4251476A1 EP 4251476 A1 EP4251476 A1 EP 4251476A1 EP 21786235 A EP21786235 A EP 21786235A EP 4251476 A1 EP4251476 A1 EP 4251476A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- energy absorber
- absorber device
- plate
- energy
- extends
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 53
- 239000006096 absorbing agent Substances 0.000 claims description 229
- 230000002093 peripheral effect Effects 0.000 claims description 34
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 230000035939 shock Effects 0.000 description 9
- 239000002131 composite material Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
Definitions
- the present invention relates to the field of energy absorber devices fitted to motor vehicles. More particularly, the invention relates to energy absorber devices arranged at the level of a motor vehicle bumper.
- the energy absorber devices of motor vehicles are usually installed between a bumper and a side member of said vehicle. Whether they are positioned at the level of the front bumper or the rear bumper of the motor vehicle, the energy-absorbing devices have the function of absorbing at least part of the energy transferred to the vehicle during potential impacts with exterior elements. More specifically, the energy-absorbing devices make it possible to prevent this energy from being transmitted entirely to the side members of the vehicle and thus to limit their deformation during these impacts, it being understood that the replacement of a side member, an important structural element of the underbody of the vehicle, would require costly operations.
- Such energy absorber devices can be made with a structure mainly made of a metallic material, but in order to improve the absorption properties, it is known to have energy absorber devices composed at least in part of a composite material.
- the use of these energy-absorbing devices, composed mainly of composite material, can generate a problem when a towing eye must be installed on the motor vehicle.
- the towing rings are positioned at the level of one of the bumpers of the vehicle and are more particularly anchored at the level of one of the energy absorber devices since this is the zone of the bumper most rigid.
- the energy-absorbing devices are composed mainly of composite material, the attachment between the energy-absorbing device and the towing eye does not have satisfactory solidity characteristics.
- connection between the towing eye and the energy absorber device must be solid in order to authorize the use of said towing eye for the traction of an object by the motor vehicle when the 'ring towing ring is attached to the rear bumper or for vehicle traction when the towing eye is attached to the front bumper.
- the object of the invention is therefore to overcome the aforementioned problem by proposing an energy absorber device whose structure and composition make it possible to ensure, on the one hand, the collection of forces in the event of shocks to avoid the transmission of forces to the side members of the vehicle and on the other hand an optimum attachment with the towing eye and thus ensure reliable use of the towing eye and of the energy absorber device.
- the invention relates to an energy absorber device configured to be mounted between a bumper and a side member of a motor vehicle, the energy absorber device comprising at least a first part composed of a first reinforced material and forming a reinforcement of said energy absorber device and a second part composed of a second unreinforced material and arranged around the reinforcement, the energy absorber device extending in a main longitudinal direction between the shocks and the spar and having a front end and a rear end opposite to each other in the longitudinal direction of the energy absorber device, characterized in that the energy absorber device comprises at least one plate produced in a material whose hardness is greater than the hardness of the second unreinforced material and which extends across the longitudinal direction of the energy absorber device.
- the energy absorber device has the function of absorbing at least part of the energy of an impact against the motor vehicle and more particularly an impact at the level of the bumper of the motor vehicle associated with this energy absorber device energy, it being understood that this bumper can here be both a front bumper and a rear bumper of the vehicle.
- the vehicle bumper comprises in particular a beam which extends across a front or rear face of the motor vehicle.
- the spar of the motor vehicle participates in forming the underbody structure under the vehicle, and extends longitudinally over substantially the entire longitudinal dimension of the vehicle, between the front bumper and the rear bumper. The spar is thus arranged substantially perpendicular to the beam of the bumper.
- the energy absorber device is more particularly arranged between the beam and one end of one of the side members participating in forming the underbody of the motor vehicle.
- the front end of the energy absorber device is defined as the end which is at least partly in contact with the beam of the bumper of the motor vehicle and the rear end of the energy absorber device as the end which is in contact at least in part with the side member of the motor vehicle.
- the first material making up the first part is a reinforced material, while the second material of the second part is an unreinforced material.
- the first material has a hardness greater than the hardness of the second material.
- the plate itself comprises a hardness greater than the hardness of the second material. Advantage is taken of such a property of the plate, combined with its positioning across the longitudinal direction of the energy absorber device, in that it reinforces the structure of the energy absorber device, without hindering its energy absorption.
- the at least one plate is provided at the level of the front end and/or the rear end of the energy absorber device.
- at least one plate is arranged at a longitudinal end of the energy absorber device, and if necessary a first plate can be arranged at a first longitudinal end while a second plate is arranged at a second end. longitudinal.
- the front plate and, where applicable, the rear plate have the particular function of distributing the traction forces generated during towing of the vehicle in the longitudinal extension of the energy absorber device.
- the function of the front plate is to distribute the forces on the first part of the energy absorber device, made of a reinforced material as specified previously, and the rear plate can make it possible to distribute the forces absorbed by the energy absorber device on a support plate for a side member of the vehicle on which the energy absorber device is attached.
- the at least one plate comprises at least one central portion which extends across the longitudinal direction of the energy absorber device and around which extends a peripheral edge, said peripheral edge extending in the longitudinal direction of the energy absorber device.
- the peripheral edge extends along the longitudinal direction of the energy absorber device in the direction of the center of the energy absorber device.
- the peripheral edge may extend along the longitudinal direction of the energy absorber device in the direction opposite to the front end of the energy absorber device.
- the first part of the energy absorber device comprises at least one wall which participates in delimiting a body of the energy absorber device between its front end and its rear end.
- the central portion of the at least one plate is arranged to overlap the body of the energy absorber device.
- the at least one plate can be made at the front end of the energy absorber device and constitutes a front plate.
- the front plate is then the plate which is at least partly in contact with the beam of the bumper of the motor vehicle.
- the front plate has a hardness greater than the hardness of the second material and that it is arranged across the longitudinal direction of the energy absorber device, in that it allows optimal maintenance of the towing eye to which it is attached.
- the pulling force exerted by the towing eye is substantially parallel to the longitudinal direction of the energy absorber device and the arrangement of the plate across this direction reinforces the resistance of the plate to said pulling force of the ring towing; - A through hole is provided in the central portion of the front plate;
- connection member extends into the through hole in the front plate
- connection member extends at least partly in the body of the energy absorber device
- the towing eye is secured to the front plate by means of the connection device.
- the peripheral edge of the front plate is surrounded on either side by the second part of the energy absorber device.
- the at least one wall of the first part of the energy absorber device which participates in delimiting the body of the energy absorber device has an outer surface facing away from said body, the edge peripheral of the front plate extending against the outer surface of said wall.
- the second part of the energy absorber device is molded over the first part of the energy absorber device so that it is at least in contact with the outer surface of the wall of said first part and in contact with the peripheral edge of the front plate. Advantage is taken of such an arrangement of the second part of the energy absorber device in that it ensures the maintenance of the front plate against the body of said energy absorber device.
- the peripheral edge of the front plate is sandwiched between the outer surface of the wall of the first part of the energy absorber device and the second part of the energy absorber device. This ensures that the plate is held in place against the front end of the energy absorber device.
- the front plate of the energy absorber device extends in a first main plane inclined with respect to a plane perpendicular to the longitudinal direction of the energy absorber device.
- the at least one plate is formed at the rear end of the energy absorber device and forms a back plate.
- the rear plate therefore constitutes the plate in contact at least partially with the side member of the motor vehicle.
- the energy absorber device can be equipped with a front plate and/or a back plate.
- the rear plate comprises at least a central surface and a peripheral edge which surrounds the central surface, said peripheral edge extending substantially perpendicularly from said central surface;
- the rear plate comprises at least one fixing hole formed in its central surface, the at least one fixing hole being configured to cooperate with at least one fixing means of the energy absorber device;
- the rear plate comprises at least one slot forming a passage for the second material through the rear plate;
- a bore is formed in the central surface of the rear plate, the bore being delimited by a raised edge;
- the wall of the first part of the energy absorber device comprises an internal surface which delimits the body of the energy absorber device, the raised edge of the rear plate extending against the internal surface of said wall;
- the wall of the first part of the energy absorber device comprises an internal surface which delimits the body of the energy absorber device, the raised edge of the rear plate extending at a non-zero distance from said internal surface;
- the second part of the energy absorber device is molded onto the rear plate so that it is at least in contact with the central surface and the peripheral edge of said rear plate. In this way, the rear plate is maintained in position within the energy absorber device;
- the rear plate extends in a second main plane perpendicular to the longitudinal direction of the energy absorber device.
- the second part of the energy absorber device extends at least partly in the body of the energy absorber device delimited by the wall of the first part of the energy absorber device.
- the structure of the energy absorber device is reinforced by at least partially filling the space formed by the wall of the first part, that is to say the body of the energy absorber device, by means of of the second part comprising the second unreinforced material.
- the deformation of the energy absorber device is guaranteed in the event of impact against the bumper of the motor vehicle while ensuring its solidity within said motor vehicle.
- the energy absorber device and a beam of the bumper of the motor vehicle are made in one piece.
- the first part of the energy absorber device has an Omega profile.
- the first part of the energy absorber device extends in one piece between the front end and the rear end of said energy absorber device.
- the first material is a composite material.
- the composite material comprises fibers which extend along the longitudinal direction of the energy absorber device.
- the direction of elongation of the fibers is substantially parallel to a direction of the forces absorbed by the energy absorber device during an impact suffered by the motor vehicle.
- the fibers of the composite material extend continuously from the front end to the rear end of the energy absorber device.
- the second material is a plastic material.
- the at least one plate is made of a metallic material.
- the at least one plate is made of a material whose hardness is greater than the hardness of the first reinforced material.
- the invention also relates to a motor vehicle comprising at least one bumper, at least one side member and at least one energy-absorbing device according to any one of the preceding characteristics, the energy-absorbing device being placed between said -shocks and said spar.
- At least one energy absorber device is arranged between a front bumper of the motor vehicle and a front side member and/or a rear bumper of the motor vehicle and a rear side member.
- FIG 1 is a general perspective view of a motor vehicle comprising at least one bumper
- FIG 2 is a schematic view of the bumper of Figure 1 comprising a beam, an energy absorber device according to the invention and at least one side member;
- FIG 3 is a general perspective view of the energy absorber device of Figure 2 according to a first embodiment of the invention
- FIG 4 is a view of the energy absorber device of Figure 3, from a different perspective;
- FIG 5 is a sectional view in a longitudinal and transverse plane of the energy absorber device of Figure 3;
- FIG 6 is a perspective view of a front plate and a rear plate of the energy absorber device of Figure 3;
- FIG 7 is a sectional view of the energy absorber device of Figure 2 according to a second embodiment of the invention.
- a motor vehicle i comprises at least one bumper 2 arranged transversely at the level of its front face, as can be seen in particular in FIG. According to the invention, this bumper is fixed to longitudinal members forming the underbody structure of the vehicle, by means of energy-absorbing devices. It should be considered in the rest of the detailed description that the motor vehicle i also comprises a rear bumper, here not visible, mounted at the opposite end of the longitudinal members via energy-absorbing devices of an equivalent bumper to those which will be described in detail in the description. Thus, in the remainder of the description, bumper 2 will be referred to as the front bumper and the rear bumper when the characteristics apply to both of the bumpers 2.
- the term side member 4 will refer to the front or rear part of the underbody of the vehicle when the characteristics apply to both of the side members 4.
- two energy absorber devices 6 are arranged between side members 4 and a front bumper 2.
- the bumper 2 of the motor vehicle comprises at least one beam 8 which comprises two lateral ends 10. More specifically, the beam 8 comprises a first lateral end 10a and a second lateral end 10b opposite to each other the along a main lateral elongation direction T of the beam 8.
- a first spar 4a and a second spar 4b extend respectively at the level of the first lateral end 10a and the second lateral end 10b of the beam 8 and substantially perpendicular to it.
- the energy absorber device 6 arranged between at least one of the beams 4 and one of the ends of the beam 10, has the function of reducing the structural deformation of the motor vehicle during an impact of the latter against an element external to said vehicle î. More specifically, and for example during a frontal impact, that is to say against the front bumper 2 of the motor vehicle i, the energy absorber device 6 has the function of limiting the structural damage of the front side members 4 by absorbing part of the energy released by the impact.
- the energy absorber device 6 then has a particular structure which allows it to absorb at least part of the energy of the frontal impact, in particular because of its arrangement and its composition which will be detailed in the following detailed description. .
- a towing ring 12 is arranged at the level of the front bumper 2. More specifically, the towing ring 12 is secured at least to the energy absorber device 6, and extends substantially perpendicular to said beam 8 of the bumper 2 before.
- the function of the towing ring 12 is, for example, to allow the connection between the motor vehicle carrying the towing ring 12 and another vehicle, for example in the event of towing of the vehicle equipped with the ring 12. need for the towing eye 12 to be anchored effectively and reliably in the bumper 2 and the energy absorber device 6 of the motor vehicle 1. In other words, the towing ring 12 and the energy absorber device 6 must present a reliable connection while allowing the deformation of the energy absorber device 6 so that it limits the deformation of the spar 4 during an impact.
- the at least one energy absorber device 6 extends between the first spar 4a and the beam 8, at the level of the first lateral end 10a of this beam 8. More specifically, the energy absorber device 6 s extends along a main longitudinal direction, hereinafter referred to as the longitudinal direction L, substantially perpendicular to the main lateral direction of elongation T of the beam 8, between the bumper 2 and the side member 4.
- the energy absorber device 6 comprises a front end 14 and a rear end 16, opposite to each other along the longitudinal direction L of the energy absorber device 6, the front end 14 then being the end in contact with the beam 8 and the the rear end 16 being the end in contact with the spar 4.
- the towing ring 12 previously described extends mainly in the longitudinal direction L of the energy absorber device 6, and is secured to this energy absorber device 6 at its front end 14.
- the connection between the towing eye 12 and the energy absorber device 6 will be described in more detail in following detailed description
- an energy absorber device can be mounted but that an energy absorber device can be provided in accordance with what can exist in the prior art, since it is not expected that the towing ring is arranged in the extension of the second spar but only in the extension of the first spar.
- the energy absorber device 6 comprises at least a first part 18 composed of a first reinforced material and a second part 20 composed of a second unreinforced material. More specifically, the first part 18 forms an armature of the energy absorber device 6 and the second part 20 is arranged around this armature. It results from the use of a reinforced material that the first material has a higher hardness than the hardness of the second unreinforced material.
- the first material is a composite material which comprises fibers which extend along the longitudinal direction L of the energy absorber device 6. Provision may also be made for these fibers to extend continues from the front end 14 to the rear end 16 of the energy absorber device 6.
- the second material may be a plastic material.
- the first part 18 of the energy absorber device 6 extends in one piece between the front end 14 and the rear end 16 of said energy absorber device 6 and comprises at least one wall 22 which participates in delimiting a body 24 of the energy absorber device 6, between its front end 14 and its rear end 16.
- the wall 22 of the first part 18 of the energy absorber device 6 then has an outer surface 26 facing away from said body 24 and an inner surface 28 facing inside the body 24.
- the first part 18 of the energy absorber device 6 may present, in a plane perpendicular to the longitudinal direction L of the energy absorber device 6, a profile in omega.
- the body 24 of the energy absorber device 6 delimited by the wall 22 of the first part 18 has an open section profile, so that the body is open on the outside of said energy absorber device 6, as is particularly visible in Figure 4.
- Figure 3 is particularly visible the second part 20 of the energy absorber device 6 which is molded on the first part 18 of the energy absorber device 6 such that said second part 20 is in contact with at least one part of the external surface 26 of the wall 22 of the said first part 18. Also and as visible in FIG. 4, the second part 20 is molded over the first part 18 of the energy absorber device 6 in such a way that the said second part 20 is in contact with at least a part of the internal surface 28 of the wall 22 of the said first part 18. In other words, the second part 20 extends in the body 24 of the energy absorber device 6 against the internal surface 28 of the wall 22 which participates in delimiting the body 24 of the energy absorber device 6.
- the second part 20 has an openwork structure which extends against the outer surface 26 and the inner surface 28 of the wall 22 of the first part 18 from the rear end 16 as far as the front end 14 of the energy absorber device 6.
- the perforated structure of the second part 20, as it extends on either side of the first part 18 against the outer surface 26 and the internal surface 28 of the wall 22 makes it possible to offer a good compromise between, on the one hand, the resistance to forces of the energy absorber device when slight shocks are suffered by the beam and, on the other hand, the desired deformation of the device energy absorber 6 during a violent impact against the bumper 2 of the motor vehicle 1 where it is desired that the energy generated by this shock is not or only slightly transmitted to the side members of the vehicle.
- the energy absorber device 6 comprises at least one plate 30 made of a material whose hardness is greater than the hardness of the second unreinforced material and which extends across the longitudinal direction L of the absorber device energy 6. Additionally, the hardness of the at least one plate 30 may be greater than the hardness of the first reinforced material and may be made for example of a metallic material.
- the at least one plate 30 comprises at least one central portion 32 which extends across the longitudinal direction L of the energy absorber device 6 and around which extends a peripheral edge 34 which extends the central portion 32 substantially perpendicularly , along the longitudinal direction L of the energy absorber device 6.
- the central portion 32 of the plate 30 extends overlapping the body of the energy absorber device 6, at its front end 14 and/or its end rear 16 and has a substantially parallelepipedic shape.
- the energy absorber device 6 comprises a front plate 30a positioned at the level of the front end 14 of the energy absorber device 6, and a rear plate 30b positioned at the level of the rear end 16 of the energy absorber device 6.
- the front plate 30a extends overlapping the body 24 of the energy absorber device 6 at the level of its front end 14 and the rear plate 30b extends overlapping the body 24 at the level of the rear end 16.
- the front plate 30a comprises at least one through hole 36 which is formed in its central portion 32 and which here has a circular shape.
- the through hole 36 of the front plate 30a makes it possible to form a passage through the front plate 30a towards the inside of the body 24 of the energy absorber device 6.
- the through hole 36 is crossed at least by one connecting member 38. More specifically, the through hole 36 is delimited peripherally by an orifice wall 37 which forms a barrel around said through hole 36, the barrel having a main direction of elongation parallel to the longitudinal direction L of the absorber device energy 6.
- connection member 38 makes it possible on the one hand to facilitate the insertion and positioning of the connection member 38 through said through hole 36, the shaft providing a means for guiding the connection member 38, And on the other hand to make it easier to hold the connection member 38 in position with respect to the longitudinal direction L of the energy absorber device 6, the longitudinal dimension of the barrel making it possible to prevent the pivoting of the connection member under forces.
- connection member 38 comprises at least one sleeve 40 forming a hollow cylindrical envelope along the longitudinal direction L of the energy absorber device 6.
- the sleeve 40 is then in contact with the orifice wall 37 of the through hole 36 and is secured to the front plate 30a, for example by welding, in particular when the connection member 38 and the front plate 30a are formed from the same material and in particular metal.
- connection member 38 passes through the front plate 30a, so that this connection member extends partly outside a volume defined by the energy absorber device 6 in the longitudinal direction L of the latter and partly in the body 24 of the energy absorber device 6.
- the connection member 38 extends successively, along the longitudinal direction L of the energy absorber device 6, in the body 24 of the energy absorber device 6, through the front plate 30a via the barrel 37 delimiting the through hole 36, then in the thickness of the beam 8 and has a free end 39, as seen in Figure 2, forming a projection from the beam 8, towards the exterior of the vehicle.
- connection member 38 which protrudes from the beam in that it facilitates the introduction of the towing eye 12 into the socket 40 of said connection member 38.
- the towing ring 12 extends into the connection member 38. More particularly, the towing ring 12 comprises a rod, which cooperates with the sleeve 40 of the connecting member 38 , and a head which forms the ring at one end of the rod and which projects from the beam 8 so that it is able to receive a coupling hook. According to an advantageous configuration, opposite the head, the rod of the towing eye 12 can extend beyond the sleeve 40 of the connection member 38, into the body 24 of the shock absorber device. energy 6 as seen in figure 2.
- the towing ring 12 is secured to the connection member 38 by a securing means which may be a screwing operation carried out by cooperation of a thread formed on the rod of the towing ring 12 and an internal thread formed in the socket 40 of said connection member 38.
- the towing ring 12 is thus secured to the connection member 38, and therefore to the front plate 30a of the energy absorber device 6.
- the peripheral edge 34 of the front plate 30a extends along the longitudinal direction L of the energy absorber device 6, in the direction of the rear end 16 of the energy absorber device 6.
- the second part 20 of the energy absorber device energy 6, which is molded onto the first part 18 of the energy absorber device 6, also extends at least in contact with the peripheral edge 34 of the front plate 30a. More precisely, the second part 20 of the energy absorber device 6 is molded around the peripheral edge 34 of the front plate 30a so that the second part 20 is interposed between the first part 18 of the energy absorber device 6 and said peripheral edge 34 of the front plate 30a, as seen in Figure 5. In this way, it should be noted that the front plate 30a extends away from the first part 18 and is maintained in its position perpendicular to the longitudinal direction L of the energy absorber device 6 by the presence of the second part 20.
- An internal face 33 of the central portion 32 of the front plate 30a facing the body 24 of the energy absorber device 6 and an external face 35 of the central portion 32 of the front plate 30a, opposite the internal face 33 are defined. along the longitudinal direction L of the energy absorber device 6.
- the second part 20 of the energy absorber device 6 which extends by overmolding the peripheral edge 34 of the front plate 30a also extends overlapping the internal face 33 of the central portion 32 of said front plate 30a.
- the second part 20 of the energy absorber device 6 also extends partly overlapping the outer face 35 of the central portion 32 of the front plate 30a. More specifically, the second part 20 extends such that it forms a honeycomb mesh against the outer face 35 of the central portion 32 of the front plate 30a.
- the mesh can be square, triangular or rectangular, the size of the mesh having a dimension sufficient to ensure the mechanical strength in a context of optimizing the cost and weight of the part.
- the front end 14 of the energy absorber device 6 has an inclination with respect to a plane A, perpendicular to the longitudinal direction L of said energy absorber device 6.
- 14 of the energy absorber device 6, and in particular the front plate 30a disposed at the level of this front end 14, extends mainly in an end plane B which is inclined, at an angle a of between i° and 45° , with respect to the plane A perpendicular to the longitudinal direction L of the energy absorber device 6.
- This particular inclination of the front end 14 of the energy absorber device 6 allows the latter to best match the shape of the beam 8 of the motor vehicle in line with the side members 4, as can be seen in FIG. 2, and more precisely at the level of a housing 44 of the beam 8, formed at the level of its first lateral end 10a.
- This inclination of the front plate 30a results in a particular configuration of the barrel formed by the orifice wall 37.
- the orifice wall 37 is one side coming from a boss forming a projection of the front plate opposite the body 24 of the energy absorber device and the other side coming from a depression forming a hollow in the front plate.
- Such a configuration allows the orifice wall 37 to extend the front plate 30a via an intermediate portion 31 which is substantially perpendicular to the longitudinal direction of elongation of the connection member, in order to optimize the management of the towing forces. via the towing eye inserted in the socket of the connecting device.
- the rear plate 30b of the device energy absorber 6 comprises at least one central surface 46 and a peripheral edge 48 which surrounds the central surface 46, said peripheral edge 48 of the rear plate 30b extending substantially perpendicularly from said central surface 46 on its periphery.
- a bore 49 is formed substantially at the center of the central surface 46 of the rear plate 30b, such that it opens inside the body 24 of the energy absorber device 6.
- the bore 49 is delimited by an edge statement 50 here circular and extending substantially perpendicularly the central surface.
- the raised edge 50 which peripherally delimits the bore 49 of the rear plate 30b then extends along the longitudinal direction L of the energy absorber device 6 and in the direction of its front end 14.
- the rear plate 30b has a front face facing the body 24 of the energy absorber device 6 and the raised edge 50 protrudes from this front face of the rear plate.
- the bore 49 of the rear plate 30b is dimensioned such that the raised edge 50 extends at least partly into the body 24 of the energy absorber device 6.
- the raised edge 50 of the bore 49 of the rear plate 30b extends at a non-zero distance I from the internal surface 28 of the wall 22 of the first part 18, this distance being measured along a line perpendicular to the longitudinal direction L of the energy absorber device 6.
- the central surface 46 of the rear plate 30b extends over a larger area than that defined by the projection of the body 24 of the energy absorber device 6 in the plane A perpendicular to the longitudinal direction L of the energy absorber device 6.
- Such a configuration of the central surface 46 of the rear plate 30b facilitates the fixing of the energy absorber device 6 with the spar 4 at the level of the rear end 16 of the energy absorber device.
- a plurality of fixing holes 52 is formed in this peripheral zone of the central surface 46 of the rear plate 30b, the holes being substantially distributed over this peripheral zone.
- the plurality of mounting holes 52 is intended to allow the attachment of the energy absorber device 6 with the spar 4 of the motor vehicle with which it is associated, here the first spar 4a of said vehicle.
- each of the fixing holes 52 is configured to cooperate with at least one fixing means of the energy absorber device 6, not visible, said fixing means being capable of also cooperating with the side member 4 of the motor vehicle.
- the fixing means may for example be a screw.
- a plurality of slots 54 separate from the mounting holes 52, is formed in the central surface 46, again in the peripheral area which consists of a portion of the central surface 46 not covered by the body 24 of the energy absorber device 6.
- the function of the plurality of slots 54 is to form a passage for the second material so that the latter becomes impregnated in the thickness of the rear plate 30b during its overlapping injection of said rear plate 30b and ensures the holding of the rear plate.
- the second part 20 of the energy absorber device 6 is molded over the rear plate 30b, as can be seen in FIG. 3, such that the second part 20 extends at least overlapping the central surface 46 of the the rear plate 30b. More specifically, the second part 20 of the energy absorber device 6 covers the central surface 46, the peripheral edge 48, the raised edge 50 of the bore 49 of the rear plate 30b, as well as the plurality of slots 54 formed in said central surface 46.
- the openings 54 which are filled with the second material forming the second part 20 and the fixing holes 52 for which one makes sure, for example by plugging them during the injection of the second material or well by making these holes after the injection of the second material, that they are not blocked so as not to interfere with the passage of the fixing means provided.
- the rear plate 30b extends in a second main plane C, which is perpendicular to the longitudinal direction L of the energy absorber device 6 and therefore parallel to the plane A mentioned above.
- the front plate 30a extends in an inclined manner with respect to the rear plate 30b, the inclination being determined with respect to the longitudinal direction L of the shock absorber device. energy 6.
- the rear plate 30b is arranged so that its face rear, facing away from the body 24, or perpendicular to the longitudinal direction of the energy absorber device 6 so as to facilitate the pressing of the energy absorber device on a plate formed at the end of the corresponding spar.
- the second material injected to form the second part does not extend overlapping the rear face, to facilitate obtaining a flat surface for attachment to the plate of the corresponding spar.
- FIG. 7 showing a view in longitudinal section of the energy absorber device 6.
- the first embodiment of the invention will be mentioned.
- the front plate 30a and the rear plate 30b have an arrangement according to their respective plane B, C , identical to what has been detailed in the first embodiment of the invention.
- the second part 20 of the energy absorber device 6 extends in the body 24 of the energy absorber device 6 delimited by the wall 22 of the first part 18, such that the entire of the space defined inside the body 24 is filled with the second material forming the second part 20.
- Such an arrangement of the second part 20 of the energy absorber device 6 within the body 24 of the latter makes it possible to reinforce its structure for holding the bumper and the energy-absorbing devices in the event of small shocks, while allowing the deformation of the energy-absorbing device 6 during larger shocks, the second part 20 being made of unreinforced material.
- the central portion 32 of the front plate 30a is dimensioned such that the peripheral edge 34 of the front plate 30a extends against the outer surface 26 of the wall 22 of the first part 18 of the energy absorber device 6. It is then understood that in this second embodiment of the invention, when the second part 20 of the energy absorber device 6 is molded over the peripheral edge 34 of the front plate 30a, said peripheral edge 34 is enclosed between the outer surface 26 of the wall 22 of the first part 18 of the energy absorber device 6 and the second part 20 of the energy absorber device 6. It is then understood that a such an arrangement between the first part 18, the peripheral edge 34 of the front plate 30a and the second part 20 makes it possible to firmly hold said front plate 30a overlapping the body 24 of the energy absorber device 6 at its front end 14.
- the peripheral edge 48 of the rear plate 30b extends perpendicularly from the central surface 46 and in the direction of the side member of the motor vehicle.
- the peripheral edge 48 projects from the rear face of the rear plate 30b, opposite the volume defined by the body 24 of the energy absorber device 6.
- Another difference consists in that the edge raised 50 of the bore 49 of the rear plate 30b extends against the internal surface 28 of the wall 22 of the first part 18. It is then understood from the foregoing that the raised edge 50 of the bore 49 is sandwiched between the internal surface 28 of the wall 22 of the first part 18 and the second part 20 of the energy absorber device 6 which extends into the body 24 of the energy absorber device 6.
- the rear plate 30b retains its previously described role of distributing the forces over the entire plate formed at the end of the spar, and the fact that this rear plate is directly in contact with the wall 22 of the first part allows a direct transfer of the forces and better resistance of the vehicle structure to the forces generated by towing operations.
- the second part 20 can be injected to fill both the interior of the body 24 and the internal volume defined by the peripheral edge 48 and the central surface 46 of the rear plate.
- the energy absorber device 6 as it has just been described can be manufactured by assembling the first material of the first part 18 with the front plate 30a and the rear plate 30b, then overmoulding of the second material of the second part 20 on the assembly described above. The energy absorber device 6 thus formed is then placed and secured in the motor vehicle, in particular with the corresponding side member 4 and the beam 8 of the bumper 2.
- the latter may first comprise a step of assembling the first material with the front plate 30a and the rear plate 30b, then a step of overmolding the second material forming the second part 20 of the energy absorber device 6, but in such a way that the second material also forms the beam 8 of the bumper 2.
- the energy absorber device 6 and the beam 8 of the motor vehicle are made of in one piece.
- the invention as it has just been described therefore makes it possible, by simple means, to increase the solidity of the connection between a towing ring and an energy absorber device, while retaining the properties of deformation and energy absorption of the latter.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2012187A FR3116491B1 (fr) | 2020-11-26 | 2020-11-26 | Dispositif absorbeur d’énergie. |
PCT/EP2021/077597 WO2022111896A1 (fr) | 2020-11-26 | 2021-10-06 | Dispositif absorbeur d'energie |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4251476A1 true EP4251476A1 (fr) | 2023-10-04 |
Family
ID=74758948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21786235.8A Pending EP4251476A1 (fr) | 2020-11-26 | 2021-10-06 | Dispositif absorbeur d'energie |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240001878A1 (fr) |
EP (1) | EP4251476A1 (fr) |
CN (1) | CN116419872A (fr) |
FR (1) | FR3116491B1 (fr) |
WO (1) | WO2022111896A1 (fr) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2842152B1 (fr) * | 2002-07-15 | 2005-02-11 | Peugeot Citroen Automobiles Sa | Armature de pare-chocs avec elements absorbeur de chocs perfectionne |
JP5634896B2 (ja) * | 2011-01-26 | 2014-12-03 | 昭和電工株式会社 | 車両用衝撃吸収部材 |
EP2675662B1 (fr) * | 2011-08-17 | 2015-01-21 | Kirchhoff Automotive Deutschland GmbH | Construction de pare-chocs pour véhicule |
KR101724498B1 (ko) * | 2015-10-14 | 2017-04-07 | 현대자동차 주식회사 | 차량용 크래쉬 박스 및 그 제조방법 |
US10065468B2 (en) * | 2016-04-22 | 2018-09-04 | GM Global Technology Operations LLC | Attachment plate and towing lug combination for a composite bumper beam and composite crush can assembly |
FR3074750B1 (fr) * | 2017-12-11 | 2020-07-10 | Compagnie Plastic Omnium | Systeme d'absorption de choc pour vehicule automobile |
-
2020
- 2020-11-26 FR FR2012187A patent/FR3116491B1/fr active Active
-
2021
- 2021-10-06 EP EP21786235.8A patent/EP4251476A1/fr active Pending
- 2021-10-06 US US18/254,716 patent/US20240001878A1/en active Pending
- 2021-10-06 WO PCT/EP2021/077597 patent/WO2022111896A1/fr active Application Filing
- 2021-10-06 CN CN202180066152.XA patent/CN116419872A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
US20240001878A1 (en) | 2024-01-04 |
WO2022111896A1 (fr) | 2022-06-02 |
CN116419872A (zh) | 2023-07-11 |
FR3116491B1 (fr) | 2023-03-10 |
FR3116491A1 (fr) | 2022-05-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1426242B1 (fr) | Coque de poutre de pare-chocs comportant une doublure de coque et un renfort | |
WO2005100100A1 (fr) | Lot d'au moins deux appuis bas pour pare-choc de vehicule automobile, et lot de deux blocs avant | |
EP3661812B1 (fr) | Ensemble pare-chocs pour vehicule automobile | |
EP2762367B1 (fr) | Ensemble de pare-chocs pour véhicule automobile | |
EP2380781A1 (fr) | Ensemble d'absorption d'énergie de pare-chocs arrière de véhicule automobile | |
FR2998524A1 (fr) | Ensemble de pare-chocs pour vehicule automobile a deux demi-coques | |
EP3083375B1 (fr) | Ensemble comportant une traverse de planche de bord pour véhicule automobile et deux supports latéraux permettant de fixer cette traverse à la caisse du véhicule | |
WO2012168658A1 (fr) | Châssis de véhicule automobile avec renfort de pare-chocs | |
FR2842152A1 (fr) | Armature de pare-chocs avec elements absorbeur de chocs perfectionne | |
EP4251476A1 (fr) | Dispositif absorbeur d'energie | |
WO2020007651A1 (fr) | Agencement d'un soubassement de caisse d'un véhicule intégrant un ensemble de batteries et véhicule ayant un tel agencement | |
EP0208582B1 (fr) | Mandrin d'enroulement notamment pour sangle de sécurité | |
EP1762439A1 (fr) | Poutre de pare-chocs de véhicule automobile | |
EP3023306B1 (fr) | Ensemble de pare-chocs comprenant une âme formée de deux demi-âmes et une coque formée de deux demi-coques | |
FR3123038A1 (fr) | Système de reprise d’effort sur une partie basse arrière d’un véhicule automobile | |
EP0687819A2 (fr) | Dispositif d'assemblage d'au moins deux éléments par exemple de carrosserie automobile | |
WO2009066043A1 (fr) | Structure de vehicule automobile | |
WO2019043314A1 (fr) | Ensemble pare-chocs pour vehicule automobile | |
FR3127741A1 (fr) | Dispositif d’absorption d’energie | |
EP2497690B1 (fr) | Absorbeur d'énergie, dispositif d'absorption d'énergie comprenant un tel absorbeur et véhicule automobile équipé d'un tel dispositif | |
FR3123275A1 (fr) | Ensemble polyvalent pour véhicule automobile comprenant une poutre de pare-chocs | |
FR3122377A1 (fr) | Traverse de pare-chocs | |
FR3081423A1 (fr) | Vehicule avec dispositif d’absorption a surface d’impact augmentant durant un choc. | |
FR3136737A1 (fr) | ensemble structurel pour véhicule automobile | |
WO2018115657A1 (fr) | Organe de fixation d'un élément au plancher d'un véhicule |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20230510 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20240305 |