CN103085741A - Energy-absorbing block and bumper device provided with same - Google Patents

Energy-absorbing block and bumper device provided with same Download PDF

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Publication number
CN103085741A
CN103085741A CN201110332310XA CN201110332310A CN103085741A CN 103085741 A CN103085741 A CN 103085741A CN 201110332310X A CN201110332310X A CN 201110332310XA CN 201110332310 A CN201110332310 A CN 201110332310A CN 103085741 A CN103085741 A CN 103085741A
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China
Prior art keywords
energy
absorbing section
absorbing
absorbent block
facade
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Application number
CN201110332310XA
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Chinese (zh)
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CN103085741B (en
Inventor
孙金霞
刘宏翔
沈海东
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SAIC General Motors Corp Ltd
Pan Asia Technical Automotive Center Co Ltd
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Pan Asia Technical Automotive Center Co Ltd
Shanghai General Motors Co Ltd
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Priority to CN201110332310.XA priority Critical patent/CN103085741B/en
Publication of CN103085741A publication Critical patent/CN103085741A/en
Application granted granted Critical
Publication of CN103085741B publication Critical patent/CN103085741B/en
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Abstract

The invention discloses an energy-absorbing block and a bumper device provided with the same. The bumper device comprises the energy-absorbing block, a front bumper bar and vehicle front skin. The energy-absorbing block is arranged between the front bumper bar and the vehicle front skin and comprises an upper energy-absorbing portion, a lower energy-absorbing portion and a vertical face energy-absorbing portion. The upper energy-absorbing portion, the lower energy-absorbing portion and the vertical face energy-absorbing portion are made of metal plates, the vertical face energy-absorbing portion is connected between the upper energy-absorbing portion and the lower energy-absorbing portion, the upper energy-absorbing portion, the lower energy-absorbing portion and the vertical face energy-absorbing portion form a rectangular groove or a dovetail groove, hollow bores are reserved on at least one of three energy-absorbing portions, and the upper energy-absorbing portion and the lower energy-absorbing portion of the energy-absorbing block are respectively welded to the front bumper bar and are spaced from the vehicle front skin. By the adoption of the hollow bores on the energy-absorbing portion, weight of the energy-absorbing block is alleviated and overall strength of the energy-absorbing block is lowered, sufficient energy absorption is facilitated, impact of legs of a pedestrian is reduced, and leg fracture of the pedestrian is avoided.

Description

A kind of energy absorbent block and the bumper system with energy absorbent block
Technical field
The present invention relates to the bumper energy absorption piece, especially a kind of energy absorbent block and the bumper system with energy absorbent block.
Background technology
In motor traffic accidents, pedestrian lower leg is the key position that very easily comes to harm, particularly easily and automobile engine cover and front bumper bump.
For this reason, in some present vehicle design plans, the bumper energy absorption piece is set between the crash bar on automobile and covering.When bumping, the energy of part both can absorption portion be clashed in the distortion of energy absorbent block self.
Existing bumper energy absorption piece is the foam energy absorbent block basically, described foam type energy absorbent block is hot-forming by foaming PP (polypropylene) particle, but, this energy absorbent block energy-absorbing efficient is lower, and Material Cost is higher, and, owing to adopting the foam material, want to have energy-absorbing effect preferably and just must increase the thickness of foam energy absorbent block, thereby relatively reduced the front overhang length of automobile, limited the arrangement space of automobile front chamber.Therefore designing a kind of novel bumper energy absorption piece is necessary.
Summary of the invention
Injury in the time of can effectively reducing pedestrian and automotive front collision in order to solve the deficiency of existing bumper energy absorption piece, to the invention provides; Can effectively increase the device of front deck arrangement space again.
In order to realize top said purpose, device of the present invention is like this design: energy absorbent block comprises the energy-absorbing section of being positioned at, lower energy-absorbing section and facade energy-absorbing section, described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section are made by metal sheet, facade energy-absorbing section is connected between energy-absorbing section, lower energy-absorbing section, upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section consist of rectangular channel or dovetail groove, have at least one to be provided with hollow hole in described three energy-absorbing sections.
Preferably, the thickness of described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section is 0.5mm~0.8mm.
Preferably, described hollow hole is square, trapezoidal or circular.
Preferably, described hollow hole is rectangle, and the width of rectangle is that 35-45mm, length are 45-65mm.
Preferably, the energy-absorbing section of described upper and lower surface and facade energy-absorbing section are made by mild steel plate or aluminium sheet.
the present invention also provides a kind of bumper system with energy absorbent block, described bumper system comprises energy absorbent block, Guard Assy and front part of vehicle covering, energy absorbent block is arranged between Guard Assy and front part of vehicle covering, described energy absorbent block comprises the energy-absorbing section of being positioned at, lower energy-absorbing section and facade energy-absorbing section, described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section are made by metal sheet, facade energy-absorbing section is connected to energy-absorbing section, between lower energy-absorbing section, upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section's formation rectangular channel or dovetail groove, have at least one to be provided with hollow hole in described three energy-absorbing sections, the upper energy-absorbing section of energy absorbent block, lower energy-absorbing section arranges with the Guard Assy welding and with front part of vehicle covering interval respectively.
Preferably, the thickness of described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section is 0.5mm~0.8mm.
Preferably, described hollow hole is square, trapezoidal or circular.
Preferably, described hollow hole is rectangle, and the width of rectangle is that 35-45mm, length are 45-65mm.
Preferably, the energy-absorbing section of described upper and lower surface and facade energy-absorbing section are made by mild steel plate or aluminium sheet.
Have at least one to be provided with hollow hole in three energy-absorbing sections of energy absorbent block of the present invention, by with in energy-absorbing section, hollow hole being set, both alleviated the weight of energy absorbent block, reduced again the bulk strength of energy absorbent block, so that abundant energy-absorbing, reduce the impulsive force to pedestrian lower leg, thereby effectively reduced the impact acceleration that in the collision, the pedestrian lower leg knee joint is subject to, avoided pedestrian lower leg that the injury of fracture occurs.This device adopts metallic material, makes energy-absorbing efficient greatly improve, and has also reduced the longitudinal size of vehicle front, has effectively increased front overhang length, has improved front deck master layout space.
Description of drawings
Below in conjunction with accompanying drawing, energy absorbent block of the present invention is elaborated, wherein:
Fig. 1 is the area schematic of pedestrian's shank collision on automobile;
Fig. 2 is the pedestrian protecting shank collision area birds-eye view of energy absorbent block of the present invention and bumper/spoiler;
Fig. 3 is the integral structure figure of a kind of embodiment of energy absorbent block of the present invention;
Fig. 4 is the birds-eye view of Fig. 3;
Fig. 5 is the upward view of Fig. 3;
Fig. 6 has the partial schematic diagram that the present invention installs the automobile of energy absorbent block;
Fig. 7 has the partial section that the present invention installs the automobile of energy absorbent block;
Section drawing when Fig. 8 shows energy absorbent block of the present invention and pedestrian lower leg and bumps;
The section drawing of distortion maximum position when Fig. 9 shows energy absorbent block of the present invention and pedestrian lower leg and bumps.
The specific embodiment
See also Fig. 3-5, the structural representation of a kind of embodiment of energy absorbent block of the present invention, this energy absorbent block comprises energy-absorbing section 10, lower energy-absorbing section 20 and the facade energy-absorbing section 30 that is connected upper and lower surface.Wherein, herein " on ", D score is to be the reference direction of the system of axes of horizontal surface with respect to ground.Upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section consist of rectangular channel or dovetail groove, as shown in Figure 3, energy absorbent block of the present invention is by the incomplete space of sealing of upper energy-absorbing section 10, lower energy-absorbing section 20 and facade energy-absorbing section 30 shapes that are connected upper and lower surface, and this incomplete enclosure space is the class similar C-shaped in the cross section perpendicular to facade energy-absorbing section.
Energy absorbent block is designed to match with front bumper, front covering, and the upper energy-absorbing section 10 of this energy absorbent block, lower energy-absorbing section 20 can be the quadrant shape, and described facade energy-absorbing section 30 can be the arc shape, and therefore, each face of energy absorbent block matches with vehicle body.
For the weight that alleviates energy absorbent block and play better energy-absorbing effect, preferably, described upper energy-absorbing section 10, lower energy-absorbing section 20 and facade energy-absorbing section 30 are made of metal sheet, preferably are made of yielding metals such as dead-soft steel, aluminium.More preferably, the thickness of described metal sheet is 0.5mm~0.8mm.In order to satisfy the requirement of pedestrian protecting shank collision performance, when adopting traditional foam type energy absorbent block, at 700 places, collision area border, thickness longitudinally is 60~70mm at least, in order to absorb more fully energy.After adopting energy absorbent block of the present invention, because energy-absorbing efficient improves greatly, at 700 places, collision area border, thickness longitudinally only needs 40~50mm.Energy absorbent block of the present invention is compared than traditional foam type energy absorbent block, has shortened 1/3rd on above-mentioned longitudinal thickness.
In three energy-absorbing sections of energy absorbent block of the present invention, have at least an energy-absorbing section to be provided with hollow hole 100.Preferably, described energy-absorbing part device arranges hollow hole on each face, and this had both alleviated the weight of energy absorbent block, has reduced again the bulk strength of energy absorbent block so that abundant energy-absorbing has reduced to make energy-absorbing efficient greatly improve to the kneed impulsive force of pedestrian lower leg.
Hollow hole 100 can evenly distribute, and also can set as required.Preferably, hollow hole 100 is with the span setting of 50~60mm.Hollow hole 100 can be designed as various suitable shapes, and is for example square, trapezoidal or circular.The size of hollow hole can design as required, and preferably, the rectangle hollow hole width is 30~45mm, and length is 45~65mm.During concrete the use, preferably the length in rectangle hollow hole 100 is 55 millimeters, and width is 40 millimeters.In a preferred embodiment, when hollow hole was circular, the hollow hole diameter range was 30~50mm.In a kind of preferred implementation of energy absorbent block of the present invention, all be provided with hollow hole in three energy-absorbing sections, when pedestrian lower leg strikes automobile, pedestrian lower leg knee joint and energy absorbent block are clashed into, this energy absorbent block absorption portion Impact energy, the conquassation bending can occur rapidly to reduce the kneed impact acceleration of pedestrian lower leg in the hollow hole of facade energy-absorbing section, subsequently, the hollow hole of two of up and down energy-absorbing section deforms, thereby reduce the kneed angle of bend of pedestrian lower leg, avoid the shank shin bone that the fracture phenomenon occurs.
For further protection pedestrian, the hollow hole position in upper energy-absorbing section 10, lower energy-absorbing section 20 is away from facade energy-absorbing section 30.If the front covering of hollow hole distance is nearer, after pedestrian lower leg clashes into, can fall the conquassation of metal energy absorbent block rapidly, thereby be pressed onto on bumper/spoiler, can cause knee joint to be subject to great impact power.Preferably, the hollow hole in described upper energy-absorbing section and upper energy-absorbing section is positioned at 1/2~2/3 position near facade energy-absorbing section, namely go up energy-absorbing section, lower energy-absorbing section hollow hole 100 close Guard Assy one end ends 1/3~1/2.Hollow hole in the energy-absorbing section of two of up and down of the present invention is near Guard Assy, can guarantee pedestrian's impact on legs automobile during the starting stage metal energy absorbent block certain intensity is arranged.
Fig. 6 and 7 is partial schematic diagrams that the present invention has the automobile that energy absorbent block is installed, and this automobile comprises energy absorbent block 1, front covering 2 and Guard Assy 3, and energy absorbent block 1 is between front covering 2 and Guard Assy 3.
Energy absorbent block 1 comprises energy-absorbing section 10, lower energy-absorbing section 20 and the facade energy-absorbing section 30 that is connected described two energy-absorbing sections, has at least one to be provided with hollow hole 100 in its three energy-absorbing sections.Preferably, upper energy-absorbing section 10, lower energy-absorbing section 20 is the plane at the ends near Guard Assy 3, is cambered surface at the end near front covering 2, and facade energy absorbent block 30 be cambered surface, and its crooked radian is consistent with the moulding face of the front covering 2 of automobile.
Described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section are made by yielding metallic material, such as dead-soft steel, aluminium etc.Upper energy-absorbing section, lower energy-absorbing section is not connected with covering by solder joint 200 and Guard Assy 3 welding.Solder joint be spaced apart 60~70mm.One or more energy-absorbing section in this energy absorbent block is provided with hollow hole 100, and hollow hole 100 can be designed as various suitable shapes, and is for example square, trapezoidal or circular.A kind of preferred implementation of the present invention has adopted the rectangle hollow hole setting of interval type, namely, all the compartment of terrain is provided with one or more hollow holes in energy-absorbing section on energy absorbent block, lower energy-absorbing section and facade energy-absorbing section, this technical scheme has not only realized the target of loss of weight, improved energy-absorbing efficient, and due to the employing metal material, thereby better energy-absorbing function had, the thickness of each energy-absorbing section is also thinner, shortens 1/3rd than traditional foam type energy absorbent block on longitudinal thickness.The entire length of energy absorbent block can be slightly longer or slightly short than Guard Assy, and preferably, both are equal in length.
Schematic diagram when Fig. 8 and 9 bumps for energy absorbent block of the present invention and pedestrian lower leg ram, Fig. 8 show just bumped integral structure section drawing when contacting of energy absorbent block 1 of the present invention and pedestrian lower leg; Integral structure section drawing when Fig. 9 shows the energy absorbent block 1 of invention and pedestrian lower leg and bumps under the distortion maximum case.
Can find out from Fig. 8,9, adopt technical scheme of the present invention, when pedestrian lower leg strikes the automobile front beam system, clash at pedestrian lower leg knee joint and energy absorbent block position, this energy absorbent block absorption portion Impact energy, the hollow hole of middle facade can occur rapidly to press the stain bending to reduce the kneed impact acceleration of pedestrian lower leg, and the hollow hole of upper and lower surfaces deforms and can reduce the kneed angle of bend of pedestrian lower leg subsequently, avoids the shank shin bone that the fracture phenomenon occurs.
Energy absorbent block of the present invention not only meets safety requirements fully, and has reduced thickness.See also Fig. 1, be depicted as the pedestrian protecting shank collision area that national standard requires automobile, Figure 2 shows that the pedestrian protecting shank collision area birds-eye view of energy absorbent block of the present invention and bumper/spoiler.In order to satisfy the requirement of pedestrian protecting shank collision performance; when adopting traditional foam type energy absorbent block; at 700 places, collision area border; longitudinally need at least the thickness of 60~70mm to absorb energy; after adopting metal energy absorbent block of the present invention; because energy-absorbing efficient improves greatly, at 700 places, collision area border, longitudinally only need the thickness of 40~50mm.Along with pedestrian lower leg and automotive front occur further to contact, the conquassation bending can occur rapidly in the hollow hole on the metal energy absorbent block, fully absorb energy, further reduce impact and angle of bend that pedestrian lower leg is subject to, prevent that pedestrian lower leg knee joint bending angle is excessive and cause fracture.If adopt existing 45mm foam energy absorbent block, the maximum impact that pedestrian lower leg is subject to surpasses 170g, and the maximum deflection angle surpasses 19 degree; If adopt 45mm metal energy absorbent block of the present invention, can the maximum impact that pedestrian lower leg is subject to be reduced to below 135g, the maximum deflection angle is reduced to below 15 degree.
It should be noted that at last: above embodiment is only in order to illustrate the present invention and unrestricted technical scheme described in the invention; Therefore, although this specification sheets has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can modify or be equal to replacement the present invention; And all do not break away from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the middle of claim scope of the present invention.

Claims (10)

1. energy absorbent block, it is characterized in that, described energy absorbent block comprises the energy-absorbing section of being positioned at, lower energy-absorbing section and facade energy-absorbing section, described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section are made by metal sheet, facade energy-absorbing section is connected between energy-absorbing section, lower energy-absorbing section, upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section consist of rectangular channel or dovetail groove, have at least one to be provided with hollow hole in described three energy-absorbing sections.
2. energy absorbent block according to claim 1, is characterized in that, the thickness of described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section is 0.5mm~0.8mm.
3. according to claim 1 or 2 described energy absorbent block, it is characterized in that, described hollow hole is square, trapezoidal or circular.
4. according to claim 1 or 2 described energy absorbent block, it is characterized in that, described hollow hole is rectangle, and the width of rectangle is that 35-45mm, length are 45-65mm.
5. according to claim 1 or 2 described energy absorbent block, it is characterized in that, the energy-absorbing section of described upper and lower surface and facade energy-absorbing section are made by mild steel plate or aluminium sheet.
6. the bumper system with energy absorbent block, is characterized in that, described bumper system comprises energy absorbent block, Guard Assy and front part of vehicle covering, and energy absorbent block is arranged between Guard Assy and front part of vehicle covering,
Described energy absorbent block comprises the energy-absorbing section of being positioned at, lower energy-absorbing section and facade energy-absorbing section, described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section are made by metal sheet, facade energy-absorbing section is connected between energy-absorbing section, lower energy-absorbing section, upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section consist of rectangular channel or dovetail groove, have at least one to be provided with hollow hole in described three energy-absorbing sections;
The upper energy-absorbing section of energy absorbent block, lower energy-absorbing section arranges with the Guard Assy welding and with front part of vehicle covering interval respectively.
7. device according to claim 6, is characterized in that, the thickness of described upper energy-absorbing section, lower energy-absorbing section and facade energy-absorbing section is 0.5mm~0.8mm.
8. according to claim 6 or 7 described devices, is characterized in that, described hollow hole is square, trapezoidal or circular.
9. according to claim 6 or 7 described devices, is characterized in that, described hollow hole is rectangle, and the width of rectangle is that 35-45mm, length are 45-65mm.
10. according to claim 6 or 7 described devices, is characterized in that, the energy-absorbing section of described upper and lower surface and facade energy-absorbing section are made by mild steel plate or aluminium sheet.
CN201110332310.XA 2011-10-27 2011-10-27 Energy-absorbing block and bumper device provided with same Active CN103085741B (en)

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CN201110332310.XA CN103085741B (en) 2011-10-27 2011-10-27 Energy-absorbing block and bumper device provided with same

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Application Number Priority Date Filing Date Title
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CN103085741B CN103085741B (en) 2015-07-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103786682A (en) * 2014-02-24 2014-05-14 重庆长安汽车股份有限公司 Automobile and passive pedestrian protection device of automobile
CN108973906A (en) * 2017-06-05 2018-12-11 标致雪铁龙集团 A kind of bumper skeleton structure being crushed and automobile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004284464A (en) * 2003-03-20 2004-10-14 Aisin Seiki Co Ltd Bumper device for automobile
CN1883983A (en) * 2005-06-22 2006-12-27 本田技研工业株式会社 Vehicle front bumper arrangement
CN2915603Y (en) * 2006-04-28 2007-06-27 上海通用汽车有限公司 Automobile bumper system
CN201272311Y (en) * 2008-06-30 2009-07-15 奇瑞汽车股份有限公司 Bumper system
CN101722914A (en) * 2009-11-06 2010-06-09 奇瑞汽车股份有限公司 Front anticollision beam assembly structure for automobile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004284464A (en) * 2003-03-20 2004-10-14 Aisin Seiki Co Ltd Bumper device for automobile
CN1883983A (en) * 2005-06-22 2006-12-27 本田技研工业株式会社 Vehicle front bumper arrangement
CN2915603Y (en) * 2006-04-28 2007-06-27 上海通用汽车有限公司 Automobile bumper system
CN201272311Y (en) * 2008-06-30 2009-07-15 奇瑞汽车股份有限公司 Bumper system
CN101722914A (en) * 2009-11-06 2010-06-09 奇瑞汽车股份有限公司 Front anticollision beam assembly structure for automobile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103786682A (en) * 2014-02-24 2014-05-14 重庆长安汽车股份有限公司 Automobile and passive pedestrian protection device of automobile
CN108973906A (en) * 2017-06-05 2018-12-11 标致雪铁龙集团 A kind of bumper skeleton structure being crushed and automobile

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