WO2005090128A1 - A bumper beam arrangement - Google Patents

A bumper beam arrangement Download PDF

Info

Publication number
WO2005090128A1
WO2005090128A1 PCT/SE2005/000397 SE2005000397W WO2005090128A1 WO 2005090128 A1 WO2005090128 A1 WO 2005090128A1 SE 2005000397 W SE2005000397 W SE 2005000397W WO 2005090128 A1 WO2005090128 A1 WO 2005090128A1
Authority
WO
WIPO (PCT)
Prior art keywords
bumper beam
crash
crash boxes
fastened
vehicle
Prior art date
Application number
PCT/SE2005/000397
Other languages
French (fr)
Inventor
Per Muskos
Original Assignee
Gestamp Hardtech Ab
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 Gestamp Hardtech Ab filed Critical Gestamp Hardtech Ab
Priority to EP05722241A priority Critical patent/EP1730003B1/en
Priority to KR1020067021987A priority patent/KR101146880B1/en
Priority to JP2007504911A priority patent/JP4741579B2/en
Priority to US10/591,022 priority patent/US7413226B2/en
Publication of WO2005090128A1 publication Critical patent/WO2005090128A1/en

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
    • 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

Definitions

  • This invention relates to a bumper arrangement for a vehicle comprising a bumper beam fastened in two crash boxes adapted to be fastened to the vehicle, wherein the bumper beam is vertically off-set fastened in the crash boxes, which have greater vertical extension than the bumper beam.
  • the crash boxes are usually fastened to the side rails of the vehicle platform in order to directly transmit crash forces to the side rails.
  • the bumper beam is usually in the same vertical position as the side rails so that the crash forces are transmitted symmetrically to the side rails.
  • the bumper beam and the side rails will be vertically off-set.
  • US-5,803,514 illustrates a bumper beam and side rails that are vertically off set.
  • the portions of the crash boxes that are not covered by the bumper beam extend horizontally to a position within ten mm from the front end of the bumper beam. Triggers may be used to further control the deformation of the crash boxes.
  • Figure 1 shows, as an example of the invention, a bumper beam arrangement seen from above.
  • Figure 2 shows the same arrangement seen as indicated by the arrows 2.
  • Figure 3 is a section taken along line 3-3 in figure 1.
  • Figure 4 is a section taken along line 4-4 in figure 2.
  • FIG. 1 and 2 show a bumper beam 11 fastened in two crash boxes 12,13.
  • the crash boxes and the fastening of the bumper beam in them are similar and only the crash box 13 will be described.
  • the crash box 13 has a plate or flange 14, preferably welded to the box, and the plate or flange has a number of screw holes 15 by which it can be fastened to a supporting part of the vehicle, that is, to the vehicle platform. It can for example be fastened by screws and nuts to a corresponding plate on the front end of a side rail of the vehicle.
  • Figure 3 is a transverse section of the crash box 13 that consists of a lower part 16 and an upper part 17, which are welded together to form a closed profile.
  • the bumper beam is fastened vertically off-set to the crash boxes, which are vertically higher than the bumper beam.
  • the crash box extends with its upper part 17 above the bumper beam substantially to the front end of the bumper beam as can also be seen from figure 4, which is a longitudinal section through the crash box.
  • the bumper beam has preferably a hat profile as shown in figure 4, but it may have another profile. It can be produced with the press hardening method, that is, hot stamped from a flat blank and directly hardened in the forming tools, which are cooled. With this process, yield strength of over 1000 MPa and even over 1500 MPa can be reached. Alternatively, the bumper beam can be formed cold from a high strength cold forming steel sheet. The two halves 16,17 of the crash box can preferably be produced similarly and then welded together.
  • the abutting end of the lower part 16 of the crash box and the abutting end of the lowest portion of the upper part 17 have a form adapted to the bumper beam and are welded to the bumper beam.
  • the bumper beam has a hole 18, in which a support for a tow hook can be fastened.
  • the upper part 17 of the crash box may have a trigger 19 at the inner end of its extended portion, which triggers and controls the initial deformation. Other triggers such as trigger 20 may also be used to control the further deformation of the crash box.
  • the position of the crash boxes 12,13 on the vehicle is determined by the design of the vehicle, and the bumper beam 11 must also be adapted to the design of the vehicle, but also to legislation and standard test procedures.
  • the crash boxes are dimensioned not to begin to deform until the bumper beam has been deformed. They are shown as having a higher cross section height than the bumper beam has at its fastening portions.
  • the portions of the crash boxes that are not covered by the bumper beam extend, as shown, to the front end of the bumper beam profile and these portions will take up crash forces when the bumper beam begins to deform or has been deformed. As a result, the tendency of the crash boxes to bend and to rotate the system downwards will be counteracted. In this way, the deformation properties will be good even though the bumper beam is vertically off-set the crash boxes.
  • the crash boxes extend substantially to the front end of the bumper beam profile as shown, but the desired function will be there also if they end within 10 mm behind the front end of the bumper beam or possibly even if they pass the bumper beam up to 10 mm

Abstract

A bumper beam arrangement comprises a bumper beam fastened in two crash boxes (12,13). The crash boxes are vertically higher than the bumper beam, and the bumper beam is fastened vertically off set in the crash boxes. The portions of the crash boxes that are not covered by the bumper beam extend forwards to the front end of the bumper beam profile.

Description

A bumper beam arrangement
Technichal area
This invention relates to a bumper arrangement for a vehicle comprising a bumper beam fastened in two crash boxes adapted to be fastened to the vehicle, wherein the bumper beam is vertically off-set fastened in the crash boxes, which have greater vertical extension than the bumper beam.
Background of the invention
The crash boxes are usually fastened to the side rails of the vehicle platform in order to directly transmit crash forces to the side rails. The bumper beam is usually in the same vertical position as the side rails so that the crash forces are transmitted symmetrically to the side rails. For some vehicles, for example a SUN, the bumper beam and the side rails will be vertically off-set. US-5,803,514 illustrates a bumper beam and side rails that are vertically off set.
Object of invention
It is an object of the invention to reduce the asymmetrical load on the crash boxes so as to improve the plastic deformation and the energy absorption when the height of the bumper beam is not at the same height as the vehicle platform. To this end, the portions of the crash boxes that are not covered by the bumper beam extend horizontally to a position within ten mm from the front end of the bumper beam. Triggers may be used to further control the deformation of the crash boxes.
Brief description of the drawings
Figure 1 shows, as an example of the invention, a bumper beam arrangement seen from above.
Figure 2 shows the same arrangement seen as indicated by the arrows 2.
Figure 3 is a section taken along line 3-3 in figure 1.
Figure 4 is a section taken along line 4-4 in figure 2.
Description of the illustrated and preferred example of the invention The figures 1 and 2 show a bumper beam 11 fastened in two crash boxes 12,13. The crash boxes and the fastening of the bumper beam in them are similar and only the crash box 13 will be described. The crash box 13 has a plate or flange 14, preferably welded to the box, and the plate or flange has a number of screw holes 15 by which it can be fastened to a supporting part of the vehicle, that is, to the vehicle platform. It can for example be fastened by screws and nuts to a corresponding plate on the front end of a side rail of the vehicle. Figure 3 is a transverse section of the crash box 13 that consists of a lower part 16 and an upper part 17, which are welded together to form a closed profile. From figure 2 can be seen that the bumper beam is fastened vertically off-set to the crash boxes, which are vertically higher than the bumper beam. From figure 1 can be seen that the crash box extends with its upper part 17 above the bumper beam substantially to the front end of the bumper beam as can also be seen from figure 4, which is a longitudinal section through the crash box.
The bumper beam has preferably a hat profile as shown in figure 4, but it may have another profile. It can be produced with the press hardening method, that is, hot stamped from a flat blank and directly hardened in the forming tools, which are cooled. With this process, yield strength of over 1000 MPa and even over 1500 MPa can be reached. Alternatively, the bumper beam can be formed cold from a high strength cold forming steel sheet. The two halves 16,17 of the crash box can preferably be produced similarly and then welded together.
The abutting end of the lower part 16 of the crash box and the abutting end of the lowest portion of the upper part 17 have a form adapted to the bumper beam and are welded to the bumper beam. The bumper beam has a hole 18, in which a support for a tow hook can be fastened. The upper part 17 of the crash box may have a trigger 19 at the inner end of its extended portion, which triggers and controls the initial deformation. Other triggers such as trigger 20 may also be used to control the further deformation of the crash box.
The position of the crash boxes 12,13 on the vehicle is determined by the design of the vehicle, and the bumper beam 11 must also be adapted to the design of the vehicle, but also to legislation and standard test procedures. The crash boxes are dimensioned not to begin to deform until the bumper beam has been deformed. They are shown as having a higher cross section height than the bumper beam has at its fastening portions. The portions of the crash boxes that are not covered by the bumper beam extend, as shown, to the front end of the bumper beam profile and these portions will take up crash forces when the bumper beam begins to deform or has been deformed. As a result, the tendency of the crash boxes to bend and to rotate the system downwards will be counteracted. In this way, the deformation properties will be good even though the bumper beam is vertically off-set the crash boxes. Preferably, the crash boxes extend substantially to the front end of the bumper beam profile as shown, but the desired function will be there also if they end within 10 mm behind the front end of the bumper beam or possibly even if they pass the bumper beam up to 10 mm.

Claims

Claim 1. A bumper arrangement for a vehicle comprising a bumper beam (11) fastened in two crash boxes (12,13) adapted to be fastened to the vehicle, wherein the bumper beam (11) is vertically off-set fastened in the crash boxes (12,13), which have greater vertical extension than the bumper beam characterised in that the portions (17) of the crash boxes that are not covered by the bumper beam extend horisontally to a position within ten mm from the front end of the bumper beam.
2. A bumper beam according to claim 1, characterised by a deformation trigger (19) at the inner end of the crash box portion that extends towards the front end of the bumper beam.
PCT/SE2005/000397 2004-03-23 2005-03-18 A bumper beam arrangement WO2005090128A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05722241A EP1730003B1 (en) 2004-03-23 2005-03-18 A bumper beam arrangement
KR1020067021987A KR101146880B1 (en) 2004-03-23 2005-03-18 A bumper beam arrangement
JP2007504911A JP4741579B2 (en) 2004-03-23 2005-03-18 Bumper beam equipment
US10/591,022 US7413226B2 (en) 2004-03-23 2005-03-18 Bumper beam arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0400728A SE0400728L (en) 2004-03-23 2004-03-23 Bumper arrangement for vehicles
SE0400728-2 2004-03-23

Publications (1)

Publication Number Publication Date
WO2005090128A1 true WO2005090128A1 (en) 2005-09-29

Family

ID=32067482

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/000397 WO2005090128A1 (en) 2004-03-23 2005-03-18 A bumper beam arrangement

Country Status (8)

Country Link
US (1) US7413226B2 (en)
EP (1) EP1730003B1 (en)
JP (1) JP4741579B2 (en)
KR (1) KR101146880B1 (en)
AT (1) ATE395219T1 (en)
ES (1) ES2307161T3 (en)
SE (1) SE0400728L (en)
WO (1) WO2005090128A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1854675A1 (en) * 2006-05-11 2007-11-14 Wagon Automotive GmbH Motor vehicle bumper beam system
WO2007136320A1 (en) * 2006-05-19 2007-11-29 Gestamp Hardtech Ab Crash box for a vehicle
WO2017099651A1 (en) * 2015-12-08 2017-06-15 Gestamp Hardtech Ab Bumper beam

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DE102005029726B4 (en) * 2005-06-24 2007-08-02 Benteler Automobiltechnik Gmbh Bumper for a motor vehicle
SE529533C2 (en) * 2006-01-24 2007-09-04 Gestamp Hardtech Ab Car crash box
EP2024201B2 (en) * 2006-05-18 2015-12-16 Gestamp HardTech AB Bumper beam
US7559589B2 (en) * 2006-08-21 2009-07-14 Shape Corp. Bumper beam crush tower with corner impact attributes
DE102006048429A1 (en) * 2006-10-12 2008-04-17 Magna Automotive Services Gmbh Energy absorption device, in particular for non-axial load
US7651155B2 (en) * 2006-11-03 2010-01-26 Gm Global Technology Operations, Inc. Progressive energy absorber
DE102007012137A1 (en) * 2007-03-12 2008-09-18 Benteler Automobiltechnik Gmbh Crashbox and automobile bumper assembly
DE102007015865A1 (en) * 2007-04-02 2008-10-16 GM Global Technology Operations, Inc., Detroit Motor vehicle frame structure and crashbox for it
JP5040568B2 (en) * 2007-10-01 2012-10-03 マツダ株式会社 Auto body structure
US8210583B2 (en) * 2010-05-12 2012-07-03 GM Global Technology Operations LLC Energy absorber device and method of forming same
DE102010024572A1 (en) * 2010-06-22 2011-12-22 Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) Impact damping structure with crash boxes
JP5587698B2 (en) * 2010-07-30 2014-09-10 アイシン精機株式会社 Bumper device for vehicle
MX337269B (en) * 2010-09-28 2016-02-22 Magna Int Inc Scalable crush can for vehicle.
DE102010050013B4 (en) * 2010-11-02 2020-07-09 Benteler Automobiltechnik Gmbh Bumper assembly for a motor vehicle
KR101308312B1 (en) * 2011-12-15 2013-09-17 현대하이스코 주식회사 Bumper back beam for vehicle using hot press forming beam
KR101510039B1 (en) * 2014-02-06 2015-04-07 현대자동차주식회사 Crash box for vehicle
JP6020497B2 (en) * 2014-03-24 2016-11-02 トヨタ自動車株式会社 Vehicle energy absorption structure and energy absorption member
JP6479612B2 (en) * 2015-09-03 2019-03-06 豊田鉄工株式会社 Manufacturing method for bumper reinforcement
US9764704B1 (en) 2016-03-03 2017-09-19 Ford Global Technologies, Llc Bumper
US11299117B2 (en) * 2017-04-03 2022-04-12 City University Of Hong Kong Energy absorbing device
US11283395B2 (en) 2018-03-23 2022-03-22 Nextracker Inc. Multiple actuator system for solar tracker
US11387771B2 (en) 2018-06-07 2022-07-12 Nextracker Llc Helical actuator system for solar tracker
US11104283B2 (en) * 2018-11-16 2021-08-31 Aisin Seiki Kabushiki Kaisha Vehicular energy absorbing member and manufacturing method thereof
DE102019108907B4 (en) * 2019-04-04 2021-06-02 Benteler Automobiltechnik Gmbh Bumper arrangement with clinched mount
US11050383B2 (en) 2019-05-21 2021-06-29 Nextracker Inc Radial cam helix with 0 degree stow for solar tracker
DE102019130381A1 (en) * 2019-11-11 2021-05-12 Benteler Automobiltechnik Gmbh Motor vehicle component with increased strength
JP2021134913A (en) * 2020-02-28 2021-09-13 トヨタ自動車株式会社 Load absorption member and vehicle load absorption structure

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EP1464546A2 (en) * 2003-04-01 2004-10-06 Benteler Automobiltechnik GmbH Bumper system for narrow mounting space

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1854675A1 (en) * 2006-05-11 2007-11-14 Wagon Automotive GmbH Motor vehicle bumper beam system
WO2007136320A1 (en) * 2006-05-19 2007-11-29 Gestamp Hardtech Ab Crash box for a vehicle
US7874601B2 (en) 2006-05-19 2011-01-25 Gestamp Hardtech Ab Crash box for a vehicle
WO2017099651A1 (en) * 2015-12-08 2017-06-15 Gestamp Hardtech Ab Bumper beam
US10618482B2 (en) 2015-12-08 2020-04-14 Gestamp Hardtech Ab Bumper beam

Also Published As

Publication number Publication date
ATE395219T1 (en) 2008-05-15
EP1730003A1 (en) 2006-12-13
EP1730003B1 (en) 2008-05-14
ES2307161T3 (en) 2008-11-16
US20070182176A1 (en) 2007-08-09
JP2007530346A (en) 2007-11-01
KR101146880B1 (en) 2012-05-16
KR20070006857A (en) 2007-01-11
SE526015C2 (en) 2005-06-14
JP4741579B2 (en) 2011-08-03
SE0400728L (en) 2005-06-14
SE0400728D0 (en) 2004-03-23
US7413226B2 (en) 2008-08-19

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