WO2005102785A1 - Unite de pare-chocs en plusieurs parties - Google Patents

Unite de pare-chocs en plusieurs parties Download PDF

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Publication number
WO2005102785A1
WO2005102785A1 PCT/EP2005/004078 EP2005004078W WO2005102785A1 WO 2005102785 A1 WO2005102785 A1 WO 2005102785A1 EP 2005004078 W EP2005004078 W EP 2005004078W WO 2005102785 A1 WO2005102785 A1 WO 2005102785A1
Authority
WO
WIPO (PCT)
Prior art keywords
bumper
bumper unit
unit according
plastic
hollow
Prior art date
Application number
PCT/EP2005/004078
Other languages
German (de)
English (en)
Inventor
Detlef Voehringer
Jürgen Warwel
Original Assignee
Daimlerchrysler Ag
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 Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2005102785A1 publication Critical patent/WO2005102785A1/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
    • B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
    • B60R19/12—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement vertically spaced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3044—Bumpers
    • 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
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians

Definitions

  • the present invention relates to a bumper unit for a motor vehicle according to the preamble of claim 1 and a method for its production.
  • Such bumper units are integrated in the front or rear area of the body of a passenger vehicle, which is covered by a casing.
  • the bumper unit is primarily used to absorb energy in the event of an impact with another vehicle or other stationary or moving obstacle. Recently, however, the problem of a collision with a pedestrian has become the focus of attention, so that more attention is being paid to the design of such bumper units.
  • such bumper units must on the one hand be designed such that they oppose the obstacle with sufficient elasticity in the event of a pedestrian impact in order to damage the pedestrian as little as possible.
  • the relatively serious injuries usually occur because the pedestrian dips under the vehicle with his legs while the upper body hits the bonnet, which in turn causes extremely complicated injuries, especially in the knee area, as a result of this. tongues can come.
  • such a bumper unit must primarily be designed to adequately absorb the impact energy with a larger obstacle, such as another vehicle, by plastically deforming the bumper unit itself.
  • Bumper units that take both cases into account in their construction are known, for example, from German published patent applications DE 19934141 AI and DE 19956561 AI.
  • multi-part bumper systems and supports are proposed, which generally have an intermediate body designed as one or more foam parts as an energy-absorbing structure between the outside formwork, that is to say the bodywork sheet, and a carrier on the vehicle frame side.
  • the bumper unit according to the invention is constructed in three parts and has a bumper part on the outside of the body, an abutment on the vehicle frame side and at least one intermediate part that absorbs shock energy, the at least one intermediate part being extruded as a hollow plastic body.
  • the wall thickness of the hollow plastic body is designed to be infinitely variable over its width and / or height and / or depth, which can be accomplished in the extrusion of hollow bodies without considerable and therefore cost-intensive effort.
  • a variation in the wall thickness of the shock-absorbing plastic hollow body can be used to implement a force-displacement identifier specific to the respective vehicle and its bumper unit, which should determine the behavior of the bumper in the event of a collision with a pedestrian, and on the other hand thereby determining the level of force acting on the pedestrian during the impact-related deceleration of the pedestrian, so that the loads on the pedestrian can be reduced as much as possible.
  • the intermediate part can consist of an upper cross body and a lower cross body, which are then respectively supported on an upper cross member and a lower cross member of the frame.
  • At least one of the cross bodies is extruded according to the invention as a hollow plastic body, while the other cross body, in particular the cross body located above, can be formed as a foam part.
  • Such a construction is chosen to allow the lower cross body to serve as a shock absorber, in particular for the lower leg.
  • the bumper part is designed such that the transverse body located below can be integrated into the bumper part in the assembled state of the bumper unit and at least partially forms the cladding of the bumper unit.
  • the lower transverse body of the intermediate part which is designed as a hollow plastic body, is manufactured separately. Rather, it is conceivable for manufacturing process economic reasons to manufacture it in one piece with the bumper part. In a special version For example, this is achieved by providing on the bumper part inward directed towards the abutment and struts resting thereon to form the cavity, the struts being able to extend over the entire width of the bumper part or in sections to form a plurality of hollow bodies arranged next to one another can be arranged.
  • the hollow plastic body can be closed on both end sides.
  • the plastic with fibers in addition to varying the wall thickness during extrusion, so that the desired stiffness of the hollow plastic body can be produced in a targeted manner.
  • the invention further relates to a method for producing such an impact energy absorbing intermediate part for a bumper unit, wherein according to the invention this intermediate part during extrusion as a hollow plastic body with a defined variation of the wall thickness over its width and / or height and / or depth depending on a previously defined Achieving vehicle and bumper-specific force-displacement identifier is provided.
  • an upper cross body and a lower cross body designed as a plastic hollow body makes it possible to achieve a uniform modular construction, which can be used in different vehicle models, since a lower leg support is always provided.
  • This leg support by the lower cross body is also characterized by a significant improvement in functionality, since this can be made more stable in position when loaded.
  • Fig. La is a schematic exploded view of a bumper unit according to the invention in a first embodiment
  • Fig. Lc schematically shows an exploded view of a bumper unit according to the invention in a second embodiment
  • FIG. 2a shows a schematic plan view in cross section of a plastic hollow body according to the invention
  • FIG. 2b shows a schematic lateral cross-sectional view of a further hollow plastic body
  • FIG. 3 shows a further embodiment of the shock-absorbing intermediate part schematically in cross section.
  • An exploded view of a first embodiment of a bumper unit 1 according to the invention is shown schematically in FIG.
  • This bumper unit 1 essentially consists of three different components. On the one hand from the outer bumper part 2 forming the body panel and opposite from the abutment 3, which is designed as a cross member and is part of the vehicle frame by either being attached to the frame as a separate cross member or forming an integral part of this frame. On the other hand, an impact energy-absorbing intermediate part 4 is arranged between the bumper part 2 and the abutment 3.
  • this intermediate part 4 consists of an upper cross member 5 and a lower cross member 6.
  • the upper cross member 5 is supported on an upper cross member section 7 of the abutment 3 and the lower cross member 6 of the intermediate member 4 in a corresponding manner on a lower cross member section 8 of the abutment 3 from.
  • the bumper unit 1 can be seen in its assembled state.
  • the upper cross member section 7 and the lower cross member section 8 are held together on their rear sides on the side of the vehicle frame by means of flange plates, for example by a crash box.
  • all joining techniques known per se can be used for joining the three different components bumper part 2, intermediate part 4 and abutment 3.
  • the lower cross body 6 of the intermediate part 4 is extruded as a hollow plastic body, whereas the upper cross body 5 of the Intermediate part 4 is designed as a foam part, as is already known from the prior art.
  • the upper cross body 5 forms an impact energy absorbing impact absorber
  • the lower cross body 6, as a hollow plastic body forms the lower leg support in the event of a collision with a pedestrian.
  • FIG. 1c A further exemplary embodiment of a bumper unit 1 is shown in FIG. 1c.
  • the embodiment shown therein is the same as that from FIG. 1 a, with the difference that the bumper part 2 has a recess on the outside of the body into which the transverse body 6 located below is fitted in the assembled state of the bumper unit 1, so that the transverse body 6 partially forms the outer panel as an integral part of the bumper part 2.
  • FIG. 2a shows a schematic plan view of the cross-sectional shape of an intermediate part 4 designed as a hollow plastic body.
  • the wall thickness ⁇ s varies over the width of the intermediate part 4.
  • the variation ⁇ s is only shown here by way of example, but according to the invention it is defined as a function of a defined force-displacement identifier for the bumper unit, so that one leg 10 has one Pedestrian can be opposed to the desired load behavior in the collision.
  • Fig. 2b shows the intermediate part 4, which is attached to a cross member 3, in side cross-section.
  • the wall thickness ⁇ s varies over the height and depth of the hollow plastic body.
  • FIG. 3 Another embodiment of a bumper unit 1 according to the invention is shown by way of example in FIG. 3.
  • This bumper unit 1 in turn consists of a bumper part 2, a frame-side abutment 3 and an intermediate part 4 arranged therein.
  • the lower cross body 6 is designed as a hollow plastic body by struts 11 being integrally connected to the bumper part 2. These struts 11 are supported on the abutment 3 in a corresponding manner.
  • the wall thickness of the struts can vary in order to achieve a specific force-displacement identifier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

La présente invention concerne une unité de pare-chocs (1) et un procédé de fabrication de celle-ci. L'unité de pare-chocs selon l'invention est caractérisé en ce que la partie intermédiaire absorbant les chocs, située entre une partie de pare-chocs extérieure (2) et une butée (3) côté châssis, est au moins partiellement conçue en tant que corps creux en plastique. De manière avantageuse, l'épaisseur (?s) du corps creux en plastique est conçue de façon à varier progressivement en fonction d'une détection force-trajectoire définie pour un impact, notamment avec un piéton.
PCT/EP2005/004078 2004-04-21 2005-04-18 Unite de pare-chocs en plusieurs parties WO2005102785A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004019149A DE102004019149A1 (de) 2004-04-21 2004-04-21 Mehrteilige Stoßfängereinheit
DE102004019149.2 2004-04-21

Publications (1)

Publication Number Publication Date
WO2005102785A1 true WO2005102785A1 (fr) 2005-11-03

Family

ID=34965833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/004078 WO2005102785A1 (fr) 2004-04-21 2005-04-18 Unite de pare-chocs en plusieurs parties

Country Status (2)

Country Link
DE (1) DE102004019149A1 (fr)
WO (1) WO2005102785A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007032029A1 (de) 2007-07-10 2009-01-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorbau eines Kraftfahrzeugs
DE102007032030A1 (de) 2007-07-10 2009-01-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorbau eines Kraftfahrzeugs
DE102017109887B4 (de) 2017-05-09 2024-05-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Fahrzeugheck eines Kraftfahrzeuges

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404974A (en) * 1992-03-25 1995-04-11 Volkswagen Ag Impact-absorbing transverse support arrangement
EP1038732A1 (fr) * 1999-03-25 2000-09-27 Compagnie Plastic Omnium Pare-chocs muni d'un appui bas
WO2003010029A2 (fr) * 2001-07-25 2003-02-06 Decoma International Inc. Systeme de securite pour pietons protegeant les jambes
DE10143532A1 (de) * 2001-09-06 2003-03-27 Opel Adam Ag Stoßfänger für ein Kraftfahrzeug
EP1314614A2 (fr) * 2001-11-23 2003-05-28 Faurecia Industries Ensemble de pare-chocs et une poutre rigide d'impact pour véhicules automobiles
EP1329363A1 (fr) * 2002-01-16 2003-07-23 Alcan Technology & Management AG Elément déformable absorbeur d'énergie pour un véhicule
EP1352789A1 (fr) * 2002-04-11 2003-10-15 Renault s.a.s. Bouclier pare-chocs pour un véhicule automobile comportant un point de fixation destructible
EP1384629A2 (fr) * 2002-07-25 2004-01-28 Fuji Jukogyo Kabushiki Kaisha Structure de pare-chocs pour véhicule
WO2004106117A1 (fr) * 2003-06-03 2004-12-09 Decoma International Inc. Amortisseur de pare-chocs et procede de fabrication et d'assemblage

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5889438A (ja) * 1981-11-25 1983-05-27 Nissan Motor Co Ltd 自動車バンパ−用ハニカムブロツクの製造方法
FR2632587B1 (fr) * 1988-06-10 1990-08-31 Renault Dispositif de fixation pour pare-chocs de vehicules automobiles
NO173538C (no) * 1991-09-06 1993-12-29 Norsk Hydro As Konstruksjonsbjelke og fremgangsmaate ved produksjon av den samme
NO960288D0 (no) * 1996-01-24 1996-01-24 Raufoss Automotive As Stötfangerskinne
US5799991A (en) * 1996-10-23 1998-09-01 Concept Analysis Corporation Molded bumper system with reinforcement beam
ES2150849B1 (es) * 1998-04-24 2001-06-01 Fundacio Ascamm Ct Tecnologic "parachoques para vehiculos automoviles".
DE19934141A1 (de) * 1999-07-26 2001-02-01 Dynamit Nobel Kunststoff Gmbh Stoßfängerabstützung für verbesserten Fußgängerschutz bei Kraftfahrzeugen
DE19956561A1 (de) * 1999-11-24 2001-05-31 Benteler Werke Ag Stoßfängeranordnung
DE10234038A1 (de) * 2001-11-09 2003-06-05 Dynamit Nobel Kunststoff Gmbh Stoßfänger mit einem Pralldämpfer und einer Stoßfängerverkleidung

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404974A (en) * 1992-03-25 1995-04-11 Volkswagen Ag Impact-absorbing transverse support arrangement
EP1038732A1 (fr) * 1999-03-25 2000-09-27 Compagnie Plastic Omnium Pare-chocs muni d'un appui bas
WO2003010029A2 (fr) * 2001-07-25 2003-02-06 Decoma International Inc. Systeme de securite pour pietons protegeant les jambes
DE10143532A1 (de) * 2001-09-06 2003-03-27 Opel Adam Ag Stoßfänger für ein Kraftfahrzeug
EP1314614A2 (fr) * 2001-11-23 2003-05-28 Faurecia Industries Ensemble de pare-chocs et une poutre rigide d'impact pour véhicules automobiles
EP1329363A1 (fr) * 2002-01-16 2003-07-23 Alcan Technology & Management AG Elément déformable absorbeur d'énergie pour un véhicule
EP1352789A1 (fr) * 2002-04-11 2003-10-15 Renault s.a.s. Bouclier pare-chocs pour un véhicule automobile comportant un point de fixation destructible
EP1384629A2 (fr) * 2002-07-25 2004-01-28 Fuji Jukogyo Kabushiki Kaisha Structure de pare-chocs pour véhicule
WO2004106117A1 (fr) * 2003-06-03 2004-12-09 Decoma International Inc. Amortisseur de pare-chocs et procede de fabrication et d'assemblage

Also Published As

Publication number Publication date
DE102004019149A1 (de) 2005-11-24

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