WO2023161212A1 - Configuration de pare-chocs pour un véhicule automobile, ladite configuration de pare-chocs comprenant au moins un point de flambement prédéfini, et véhicule automobile comprenant une configuration de pare-chocs - Google Patents

Configuration de pare-chocs pour un véhicule automobile, ladite configuration de pare-chocs comprenant au moins un point de flambement prédéfini, et véhicule automobile comprenant une configuration de pare-chocs Download PDF

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Publication number
WO2023161212A1
WO2023161212A1 PCT/EP2023/054277 EP2023054277W WO2023161212A1 WO 2023161212 A1 WO2023161212 A1 WO 2023161212A1 EP 2023054277 W EP2023054277 W EP 2023054277W WO 2023161212 A1 WO2023161212 A1 WO 2023161212A1
Authority
WO
WIPO (PCT)
Prior art keywords
bumper
motor vehicle
bracket
holder
predetermined buckling
Prior art date
Application number
PCT/EP2023/054277
Other languages
German (de)
English (en)
Inventor
Lukas-Daniel Hambach
Original Assignee
Next.E.Go Mobile SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Next.E.Go Mobile SE filed Critical Next.E.Go Mobile SE
Publication of WO2023161212A1 publication Critical patent/WO2023161212A1/fr

Links

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
    • 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
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1886—Bumper fascias and fastening means therefor

Definitions

  • the invention relates to a bumper arrangement for a motor vehicle with at least one predetermined buckling point and a motor vehicle with such a bumper arrangement.
  • Bumpers or bumpers are usually an integral part of an automobile. Such bumpers are usually mounted at the front and rear. For example, such bumpers include a steel beam wrapped or extended with a plastic bumper fascia. It is relatively common for bumper beams to be surrounded by a plastic skin, also known as an apron. Such aprons can also be regarded as bumper cladding. In addition to the bumper support that serves as a bumper, it may also hide other technology, such as distance sensors. Particularly in the case of so-called low-speed crashes, for example bumping into a parking space, it is desirable that the bumper support and parts of the body of the motor vehicle lying behind it, in particular in the form of a vehicle frame, are not immediately damaged.
  • the object of the invention is to provide a solution with which, on the one hand, a bumper can be attached particularly reliably to a structure of a motor vehicle and, on the other hand, it can be ensured in the event of minor collisions that the rest of the motor vehicle is damaged as little as possible.
  • the bumper arrangement according to the invention for a motor vehicle comprises at least one predetermined buckling point.
  • the bumper assembly includes a bumper that includes a bumper beam and a bumper fascia. Furthermore, the bumper arrangement has a bracket, which has the at least one predetermined buckling point.
  • the bumper trim is attached to the bumper support by means of the bracket.
  • the bracket and the predetermined buckling point are designed in such a way that the Bumper arrangement on the motor vehicle, the bracket folds away when there is a pressure load acting on the bumper panel in the longitudinal direction of the vehicle due to material failure at the predetermined buckling point before the bracket is plastically deformed outside of the predetermined buckling point.
  • a body of the motor vehicle can be constructed, for example, in a space frame design.
  • the body can have a skeleton made of closed hollow profiles, for example, which are connected to one another directly or via nodes.
  • Flat components such as the roof or the windshield can be rigidly connected to the skeleton and absorb shear forces.
  • the bumper support of the bumper arrangement can, for example, belong to said skeleton, that is to say to the frame of the body of the motor vehicle.
  • the bumper support which can serve in particular as a bumper, can belong to the bodyshell of the motor vehicle.
  • the bumper trim covers the bumper support, which can be used in particular as a bumper.
  • the bumper support can be a cross member, for example, which can be an extruded profile, for example, which belongs to a vehicle frame of the motor vehicle.
  • the bumper cover can be made of plastic, for example.
  • the bumper cladding can, for example, be designed and designed in such a way that in the event of low-speed crashes, for example in the event of a parking bump, it deforms at least largely or completely only elastically and can return to its original shape.
  • the invention is based in particular on the finding that the bumper covering must be fastened to the bumper support in a particularly stable manner.
  • the structures behind the bumper cover such as the bumper support and other components of the vehicle body, in particular the rest of the vehicle frame, are not damaged as far as possible.
  • the connection of the bumper cover must be designed to be particularly stable and robust, but in the ideal case of a low-speed crash, it should not result in structures located behind the bumper cover, in particular the vehicle frame, being damaged.
  • this is realized by the holder, which has the at least one predetermined buckling point.
  • the bumper trim is attached to the bumper support by means of this bracket.
  • bracket and the predetermined buckling point of the bracket are designed in such a way that, when the bumper assembly is installed in the correct position, the bracket buckles away at a predetermined buckling point due to material failure when there is a compressive load acting on the bumper cladding in the longitudinal direction of the vehicle before the bracket plastically deforms outside of the predetermined buckling point of low-speed crashes, damage to the structures located behind the bumper cladding - of course apart from the bracket with the predetermined buckling point - can be avoided.
  • the bracket fails mechanically at the predetermined buckling point, as a result of which the bracket buckles and significantly less force is exerted on the bumper support than if the bracket did not fail mechanically in this way.
  • the mount fails in the area of its predetermined buckling point at a lower load than under a load that would be required to bring about the plastic deformation of the rest of the mount—that is, outside of the predetermined buckling point.
  • the bumper arrangement according to the invention can thus ensure that no damage occurs to the rest of the motor vehicle, apart from the holder and possibly also the bumper covering.
  • the at least one predetermined buckling point in the area of the bracket which can also be understood as a predetermined breaking point and in particular as a mechanical material weakness, provides a solution that enables the bumper trim to be attached very reliably to the bumper support, while at the same time it can be ensured that in the event of Collisions at low speeds can be ensured that the rest of the motor vehicle, such as a vehicle frame, are not affected.
  • the bumper arrangement is designed for a rear area of the motor vehicle.
  • the bumper which has the bumper support and the bumper cladding, can therefore be a bumper for the rear of the motor vehicle in question.
  • the bumper arrangement can also be designed for a front area of the motor vehicle.
  • the bumper arrangement it is also possible for the bumper arrangement to have a plurality of such mounts with the at least one predetermined buckling point, by means of which the bumper cladding is fastened to the bumper support.
  • bracket is screwed to the bumper support.
  • relatively high notch effects can be achieved in the area of the screw connection, which can lead to one or more screws used for the screw connection breaking off.
  • they can also contribute to the fact that the bracket from a certain forces can no longer be transferred from the bumper cover to the bumper support and thus also to a vehicle frame.
  • the bumper covering is clipped onto the holder.
  • Several clips made of plastic or metal can be used for this, for example, with which the bumper cover is fastened, for example, in corresponding holes or bores in the bracket.
  • the bumper cladding can be mounted on the bracket in a particularly simple manner.
  • a further possible embodiment of the invention provides that the mount can withstand greater tensile forces than compressive forces in the longitudinal direction of the vehicle before it deforms. For example, if someone leans on the bumper cover from above, a corresponding tensile force acts on the bracket.
  • the bracket with its predetermined buckling point is designed in such a way that it can withstand greater tensile forces before the bracket deforms or mechanically fails than is the case with a pressure load that can occur, for example, when bumping into a parking space.
  • the mount has a higher rigidity in the tensile direction than in the compressive direction.
  • air turbulence while driving can also ensure that corresponding tensile forces act on the mount, because air turbulence and the resulting forces act on the bumper cover.
  • the bracket can withstand greater tensile forces than compressive forces in the longitudinal direction of the vehicle before it deforms, it can be ensured that the bumper fascia is reliably held on the bumper support during normal driving and under conventional loads, for example when someone is leaning on the bumper fascia.
  • a further possible embodiment of the invention provides that the holder is made from sheet metal.
  • the mount can be a stamped and bent part, for example.
  • the holder can be manufactured particularly simply and inexpensively.
  • the mount has relatively good mechanical properties when it is made from sheet metal, so that the bumper cladding can be attached or held to the bumper support particularly reliably by means of the mount.
  • the predetermined buckling point is mechanically weakened by a notch, a perforation or a scratch mark in comparison to the surrounding area of the holder. Also it is possible both the notch that Provide perforation and the scratch mark in order to achieve the mechanical weakening in the area of the predetermined buckling point.
  • the holder can, for example, also have a lower material thickness than in the remaining area of the holder, in order to promote the buckling away or buckling of the holder in the manner already described.
  • a further possible embodiment of the invention provides that the bracket has a first limb which is fastened to the underside of the bumper support and a second limb which is fastened to the bumper cladding, the limbs being arranged at right angles to one another and the predetermined buckling point on the first leg is formed.
  • the first leg can run in particular in a plane spanned from the vehicle longitudinal direction and vehicle transverse direction, wherein the second limb can run in a plane spanned from the vehicle vertical direction in the vehicle transverse direction.
  • the force is first introduced to the second arm via the bumper cover and then transferred to the first arm, which is attached to the underside of the bumper support.
  • the holder then collapses at the predetermined buckling point, which is located on the first leg.
  • the first leg of the bracket buckles which then ensures that, particularly in the event of a low-speed crash, no further forces or at least significantly reduced forces are transmitted from the bumper cladding to the bumper support and thus to the rest of the frame of the motor vehicle.
  • a further possible embodiment of the invention provides that the legs are supported on one another via connecting struts, the connecting struts in turn having predetermined buckling points which favor the buckling of the holder before the plastic deformation of the holder outside the predetermined buckling points.
  • the controlled buckling can be set in a particularly targeted manner, particularly in the case of low-speed crashes, such as parking bumps.
  • a relatively high tensile strength of the bracket particularly in the longitudinal direction of the vehicle, can be realized via the connecting struts.
  • the mount In the event of a tensile load in the longitudinal direction of the vehicle, the mount is deformed only if the action on the mount is significantly greater than in the case of a compressive load in the longitudinal direction of the vehicle. This can be done through the corresponding design of the connecting struts can be realized, via which the legs are supported on one another or are held on one another.
  • the motor vehicle according to the invention includes the bumper arrangement according to the invention or a possible configuration of the bumper arrangement according to the invention.
  • the bumper arrangement can be provided in the rear area as well as in the front area or in both places.
  • the motor vehicle can in particular be a passenger car.
  • FIG. 1 shows a partially sectioned perspective view of a rear area of a motor vehicle which has a bumper arrangement with a predetermined buckling point
  • FIG. 2 is an enlarged perspective view, partially in section, of the partially illustrated bumper assembly including a bumper beam and a bumper fascia attached to the bumper beam through the intermediary of a bracket, the bracket having the at least one weakening point;
  • FIG. 3 shows a perspective view of the holder, with several intended buckling points being marked
  • a motor vehicle 10 is shown partially in perspective view in FIG. In the rear area that can be seen here, the motor vehicle 10 includes a bumper arrangement 12.
  • the bumper arrangement 12 includes a bumper support 14 and a bumper cover 16, which together form a bumper of the motor vehicle 10 in the rear area, which is not designated in any more detail.
  • the bumper arrangement 12 includes two brackets 18 by means of which the bumper covering 16 is held on the bumper support 14 .
  • the bumper assembly 12 may also include fewer or more of the brackets 18 .
  • FIG. 2 the area A marked in FIG. 1 is shown in a partially sectioned perspective view.
  • one of the two brackets 18 can be seen here, by means of which the bumper covering 16 is fastened to the bumper support 14 .
  • the holder 18 has a plurality of predetermined buckling points 20 , 22 .
  • the bracket 18 has a first leg 24 which is fastened to the bumper support 14 on the underside.
  • the bracket 18 has a second leg 26 which is fastened to the bumper covering 16 .
  • the two legs 24 , 26 are arranged at right angles to one another, with one of the predetermined buckling points 20 being formed on the first leg 24 .
  • the legs 24 , 26 are supported by two connecting struts 28 , the connecting struts 28 in turn having predetermined buckling points 22 .
  • the brackets 18 and the predetermined buckling points 20, 22 are designed such that when the bumper arrangement 12 is installed in the correct position on the rest of the motor vehicle 10, the brackets 18 buckle away at their predetermined buckling points 20, 22 before the brackets 18 deform outside of the predetermined buckling points 20, 22 plastically.
  • the brackets 18 can be bolted to the bumper beam 14 . In the event of a low-speed crash, notch effects can act on screws (not shown here), as a result of which the screws break off.
  • the bumper arrangement 12 is shown here in the rear area of the motor vehicle 10, a comparable bumper arrangement 12 with the corresponding brackets 18 can also be provided in the front area of the motor vehicle 10.
  • the bumper covering 16 can be clipped onto the mounts 18, for example.
  • the brackets 18 are also designed or designed in such a way that they withstand greater tensile forces than compressive forces in the longitudinal direction of the vehicle before they deform or fail mechanically. If, for example, someone leans on the bumper cover 16 from above, the mounts 18 are subjected to a tensile load, particularly in the area of their legs 24 .
  • the respective predetermined buckling points 20 are designed in such a way that such tensile loads do not lead to the holders 18 deforming or even mechanically failing.
  • the brackets 18 can be made of sheet metal, for example.
  • the brackets 18 can be produced by stamping and bending operations. However, other manufacturing processes are also possible.
  • the predetermined flexing points 20, 22 can be realized, for example, by notches, perforations and/or scratch marks, as a result of which the brackets 18 are correspondingly mechanically weakened in the area of their predetermined flexing points 20, 22.
  • brackets 18 By connecting the bumper cover 16 to the bumper support 14 using the described brackets 18 with their predetermined buckling points 20, 22, it can be ensured, particularly in the case of low-speed crashes, for example parking bumps, that the brackets 18 fail mechanically above a certain force these fail mechanically in the area of their intended buckling points 20, 22. As a result, the brackets 18 buckle or buckle away. This can ensure that in minor accidents, the bumper support and in particular underlying structures of the motor vehicle 10, such as the vehicle frame, are not damaged.

Abstract

L'invention concerne une configuration de pare-chocs (12) pour un véhicule automobile (10), ladite configuration de pare-chocs comprenant au moins un point de flambement prédéterminé (20, 22). La configuration de pare-chocs comprend : un pare-chocs qui possède une poutre de pare-chocs (14) et un revêtement de pare-chocs (16) ; au moins un support (18) qui présente le ou les points de flambement prédéterminés (20, 22) et au moyen duquel le revêtement de pare-chocs (16) est fixé à la poutre de pare-chocs (14), le support (18) et le point de flambement prédéfini (20, 22) étant conçus de sorte que, lorsque la configuration de pare-chocs (12) est installée comme prévu, le support (18) ploie au niveau du point de flambement prédéterminé (20, 22) à la suite d'une défaillance de matériau dans le cas d'une charge de compression agissant sur le revêtement de pare-chocs (16) dans la direction longitudinale du véhicule avant que le support (18) ne se déforme plastiquement à l'extérieur du point de flambement prédéterminé (20, 22). L'invention concerne également un véhicule automobile (10) comportant une telle configuration de pare-chocs (12).
PCT/EP2023/054277 2022-02-25 2023-02-21 Configuration de pare-chocs pour un véhicule automobile, ladite configuration de pare-chocs comprenant au moins un point de flambement prédéfini, et véhicule automobile comprenant une configuration de pare-chocs WO2023161212A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022104524.2 2022-02-25
DE102022104524.2A DE102022104524A1 (de) 2022-02-25 2022-02-25 STOßFÄNGERANORDNUNG FÜR EIN KRAFTFAHRZEUG MIT WENIGSTENS EINER SOLLKNICKSTELLE UND KRAFTFAHRZEUG MIT EINER STOßFÄNGERANORDNUNG

Publications (1)

Publication Number Publication Date
WO2023161212A1 true WO2023161212A1 (fr) 2023-08-31

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PCT/EP2023/054277 WO2023161212A1 (fr) 2022-02-25 2023-02-21 Configuration de pare-chocs pour un véhicule automobile, ladite configuration de pare-chocs comprenant au moins un point de flambement prédéfini, et véhicule automobile comprenant une configuration de pare-chocs

Country Status (2)

Country Link
DE (1) DE102022104524A1 (fr)
WO (1) WO2023161212A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8523251B1 (en) * 2012-06-08 2013-09-03 Nissan North America, Inc. Bumper fascia support assembly
DE102013010869A1 (de) * 2013-06-28 2014-03-27 Daimler Ag Stoßfänger für einen Kraftwagen
US8857897B2 (en) * 2011-09-27 2014-10-14 Honda Motor Co., Ltd. Light-load absorbing structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19637512C2 (de) 1996-09-13 1999-11-11 Daimler Chrysler Ag Stoßfänger
DE102008020055A1 (de) 2008-04-22 2009-11-12 Daimler Ag Deformationselement für einen Kraftwagen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8857897B2 (en) * 2011-09-27 2014-10-14 Honda Motor Co., Ltd. Light-load absorbing structure
US8523251B1 (en) * 2012-06-08 2013-09-03 Nissan North America, Inc. Bumper fascia support assembly
DE102013010869A1 (de) * 2013-06-28 2014-03-27 Daimler Ag Stoßfänger für einen Kraftwagen

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Publication number Publication date
DE102022104524A1 (de) 2023-08-31

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