CN1688464A - Pedestrian energy absorber for automotive vehicles - Google Patents
Pedestrian energy absorber for automotive vehicles Download PDFInfo
- Publication number
- CN1688464A CN1688464A CN 03823800 CN03823800A CN1688464A CN 1688464 A CN1688464 A CN 1688464A CN 03823800 CN03823800 CN 03823800 CN 03823800 A CN03823800 A CN 03823800A CN 1688464 A CN1688464 A CN 1688464A
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- energy absorber
- automobile
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Abstract
The present invention relates to an energy absorber (4), which combines the protection on passers-by and automobiles into a front bumper system. The energy absorber includes an integral moulded glass cushion made of thermoplastic material, which is provided with a plurality of crushable convexes (10) protruding outwardly. The energy absorber is combined with an automobile sheet (2) and a reinforced beam (6) to form the automobile bumper system.
Description
Technical field
The present invention relates to a kind of energy absorber, it will be attached to pedestrian's protection in the front bumper system of automobile.
Background technology
The provisional application serial number that the application requires on August 23rd, 2002 to propose is the preceence of the U. S. application of No.60/405793, and the full content of above-mentioned application in this combination as a reference.
In the rules of Japan and European countries, may need energy absorbing design in the future, avoid collision with the shank that helps the protection pedestrian to vehicle bumper system.
Present bumper collision system adopts the several independent parts of stack-mounted.Usually, these parts comprise a soft energy absorber, and this resorber is by the strength beam support of a rigidity, with Federal Motor Vehicle Safety Standards FMVSS and the ECE in Europe 42 collision rules that satisfy the U.S..The parts of energy absorber can be thermoplastic resin spare or the polypropylene foam spares near the rigid support deep beam of steel or aluminum.The bumper/spoiler assembly typically comprises a strength beam, and it constitutes and is connected to Che Liang, an energy absorber, and a decoration Automobile Plate that can be connected on the energy absorber.Automobile Plate is roughly envelope strength beam and energy absorber typically.Traditional vehicle bumper and bumper energy absorber system are designed to when low speed; approximately per hour under the speed of 5 miles (mph); in the collision of the collision of vehicle and vehicle or vehicle and solid element, protection vehicle structure and possible Vehicular occupant.New rules need the front end of automobile that to a certain degree pedestrian protecting is arranged in collision process.Vehicle bumper impacts when impact energy levels will be significantly less than traditional 5mph when such accident takes place.It is may be too hard and can not be hurt the protection of abundance is provided for alleviating the pedestrian that design-calculated is used for the vehicle bumper impacts system of 5mph.
Summary of the invention
According to an embodiment, an elongated crash energy absorption device comprises the molded pad (mat) of a fiber reinforced materials, and this spacer has a bossing forward, and crushing when this part is adapted at colliding is to absorb the power that produces in the collision process.In one embodiment, the front portion of energy absorber longitudinal extension cross-vehicle.In one embodiment, bossing comprises and is used for making a described bossing forward locally starting part of flattening at least forward, to absorb the power that collision produces.Energy absorber is made by reinforced resin material.According to an embodiment, energy absorber system has the structure that promotes to strengthen energy absorption efficiency.This system is suitable for and requires to have only the absorbed situation of a spot of energy demand, the situation when for example colliding with automotive front end in the pedestrian protection zone.
According to an embodiment, a bumper assembly is suitable for reducing or relaxing the injury that the pedestrian is subjected under the low speed situation, the injury of particularly descending leg and last leg to be subjected to.The energy absorber that this system comprises a center beam of bumper of strengthening, made by molded reinforced resin material and the Automobile Plate (fascia) of an envelope energy resorber and beam.According to this embodiment, energy absorber is made up of the molded fibrous composite of compression, has wherein adopted thermoplastic resin.
Description of drawings
Fig. 1 is the decomposition view of energy absorber system;
Fig. 2 is the front perspective view of energy absorber;
The section A-A that Fig. 3 is an energy absorber in Fig. 2 ' sectional elevation;
Fig. 4 is the part top view of the energy absorber among Fig. 2.
The specific embodiment
Fig. 1 shows a view of energy absorber 4, when this energy absorber combines with a reinforcement bumper beam 6 and an Automobile Plate 2, is configured for the energy absorbing bumper assembly of automobile.Protection pedestrian when this bumper assembly is designed for colliding with automobile front beam perhaps is used for the low-yield automobile of low speed and solid structure and collides.Energy absorber 4 has a plurality of projectioies that can crush 10, and each projection 10 has the geometric configuration that required function can be provided, and this function is applicable to strengthens crushing property.In collision process crush lobe 10 or projection 10 mainly provide to leg under the pedestrian and/or on the protection of leg.Crush lobe 10 distortion and absorption energy in collision process.The energy absorption of crush lobe 10 is suitable for being used for reducing power that is delivered to pedestrian lower leg in the collision process and the power that passes to automobile component in automobile low speed collision process.For concrete automobile, can be by the material that uses different densities, the material of different-thickness, and/or the energy absorber of part different geometries regulates the reaction of energy absorber for collision, as described below.According to different embodiment, one or more features that energy absorber incorporates is following: crushing actuator, crushing projection, bulge clearance, density, height, width and the length of the crushing cone degree of depth (draft) and/or resorber.In order to regulate the reaction of energy absorber, can change above-mentioned one or more feature for the particular crash energy level.For example, whether the height of crush lobe 10, width, the degree of depth and/or length basis are designed for the lower power that makes energy absorber generation distortion or the geometric configuration of higher power changes.This geometric configuration also can or provide higher or lower packaging space to change according to the restriction in space or client's style, this geometric configuration comprises the degree of depth of the starter gear of the cone degree of depth of can crushing, crushing cone, height, width and/or the length of crushing cone.
According to an embodiment, energy absorber 4 is by compression molded the forming of low density glass mat thermoplastic compound (GMT).Such pad is prefabricated and be that the pad of SUPERLITE is sold with the trade mark by the AZDEL Co., Ltd.In this density of using and defining weight that is every sq m GMT.Preferably, the density of GMT is about every sq m 600 grams (g/m2) to 3000 gram (g/m
2).The collision degree required according to energy absorber, density can be less than 600g/m
2Or greater than 3000g/m
2Preferably, maximal density should be less than 3000g/m
2The upper limit of density should be too not hard, and the energy that produces in the time of then can not absorbing the collision pedestrian too firmly is delivered to pedestrian's leg or the power on the both legs in the time of for example can not reducing collision.
Preparation SUPERLITE
Pad adopts short glass fiber, thermoplastic resin binder and thermoplastic polymer's monofilm or multilayer film, for example polypropylene (PP), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polycarbonate (PC), PC/PBT compound, or PC/PET compound.Usually PP, PBT, PET, PC/PET or PC/PBT compound are first-selected thermoplastic resin materials.In order to make low-density GMT, will comprise that other additive-treated oil material measures (but continuous measurement) and puts into the foaming agent of dispersion, this foaming agent is contained in the open-topped mixer, and this container utilizes impeller to filter.Foaming agent helps to disperse glass fibre and thermoplastic resin binder.The glass that disperses and the compound of thermoplastic adhesive pump into a hopper by distributing manifold.This hopper is positioned at the distribution part top of paper machine.This foaming agent, rather than glass fibre or thermoplastic adhesive along with the compound that disperses utilizes degree of vacuum to shift out through a wire screen that moves, produce uniform, fibrous wet net (web) continuously.Should wet Netcom cross a drying equipment pressurized to reduce its moisture and softening thermoplastic resin binder.When the wet net of heat came out from drying equipment, by glass fiber mesh, thermoplastic cements and poly-mer thermoplastic monofilm or multilayer film, through the roll gap of a series of heating rollers, a kind of special multilayer thermoplastic film was laminated in the net.Also a PET scrim layer can be connected to the one or both sides of net, strengthen pad so that handle glass fibre.Side at this pad can also have bonding coat or bonding film, to help being connected on strength beam or any other part.Subsequently with SUPERLITE
Compound is through idler roller, and quilt cuts the size that (cutting) becomes to need continuously.
It is the lower density compound that the pad of making requires.Though the density of measuring is not real density value, it is to determine whether this compound is applicable to the observed reading (as mentioned above) of energy absorber.As previously mentioned, be somebody's turn to do " density " preferably from 600g/m
2To 3000g/m
2Usually, the glass mat thermoplastic compound of being made by orthodox method is that density is about 5000g/m
2Or higher high density composites.Such high density composites is not suitable as energy absorber and suppresses or reduce the injury that the pedestrian is subjected to, because such compound is too hard.
Other natural fiber or syntheticfibres, for example mylar's fiber, polyamide fibre, carbon fiber or the like can be used for making low-density pad.And, can adopt the thermoplastic resin of various noncrystalline or crystallizations, for example, polyester (PET, PBT, PPT), acrylonitrile, HDPE, polyethylene (PET), polypropylene (PP), polycarbonate (PC) or PC/PBT compound, or PC/PET compound and similarly need not changes the thermoplastic polymer of the forming process of net.Can change fiber and polymer ratio at an easy rate, and the std wt of net, so that satisfy each demand of cost/performance and energy absorbing.
Glass isolator, low density glass mat (GMT) compound preferably, by forming technique, for example pressing mold or utilize air or gaseous tension as auxiliary thermoforming technology, form energy absorber 4.In thermoforming technology, adopt vacuum, but in forming operation, also can utilize positive pressure to realize through regular meeting.In moulded section, the resin material of reinforcement is heated to sinter point, typically, and from 500 to 700 °F approximately.The resin of heating is placed near the pressing mold bottom surface.Close this pressing mold with compression pad, from the pad of compression or the fortified resin of deposition, flow out up to resin.Require reinforced resin material to be heated to softening point.Mould usually by the metal with high-termal conductivity for example aluminium make.This mould has the heating and cooling system.Typically use oil as cooling system conditioner.Mould can be equipped with backing-out punch so that the pad of moulding is ejected from die cavity.Usually, Heat forming comprises heating and moulding simultaneously, and for example a thin plate is formed into the shape that needs.In case obtained the shape that needs, the object of moulding is cooled below the thermoplastic temperature at it, and takes out from mould." plastic shaping engineering handbook " nineteen ninety-five 468 pages to 498 pages Method and kit fors that describe Heat forming in detail of the 5th edition of writing at DuBois and Pribble.Also can utilize the US Patent U.S.5 that authorizes people such as Mulcahy, the thermoforming process that proposes in 601,679.In hot-forming method, typically utilize vacuum auxiliary device.Thin plate can be placed on vacuum tank or have on the die cavity of the opening that links to each other with vacuum source.In heat process, thin plate begins to sink.Typically, vacuum tank has a plurality of openings that are arranged in the film chamber, so that in the forming operation process thin plate is stretched in the mould.Typically, thin plate is positioned at the appropriate location on the concave mold and is heated by for example infrared heater.The utilization vacuum is stretched to thin plate layer the position that leans the film chamber.This process can change at the top of thin plate layer and utilize positive air pressure, and the combined method that applies degree of vacuum from the bottom is to increase molded power.
Referring to Fig. 1, wherein show the decomposition view of the constituent elements of vehicle front bumper system, this system comprises Automobile Plate 2, energy absorber 4 and the center beam of bumper of strengthening 6.When assembling, energy absorber 4 is placed between the center beam of bumper 6 of Automobile Plate 2 and reinforcement.Automobile Plate 2 is with center beam of bumper 6 (not shown) of fit envelope energy resorber 4 and reinforcement.Need provide energy absorber 4 is fixedly attached to device on the center beam of bumper 6, for example screw bolt and nut.Automobile Plate 2 can be made by thermoplastic material, preferably has finished surface and can utilize traditional automotive paint and/or application techniques to cover with paint, lacquer, colour wash, etc.As mentioned above, usually Automobile Plate with energy absorber 4 and the center beam of bumper 6 strengthened all envelope get up, after they are connected on the automobile, except Automobile Plate 2, can't see any parts like this.Automobile Plate 2 can be connected on other parts of center beam of bumper 6 and automobile.
As shown in Figure 2, energy absorber 4 has a rearward-facing flange or supports 14, is used to attach it to center beam of bumper 6.Be provided with hole 16 on flange 14, be used to insert fastener, bolt (not shown) for example is so that be fixedly installed to energy absorber 4 on the center beam of bumper 6.A plurality of crush lobes 10 are protruding and along energy absorber 4 vertical spaces from flange 14.Fig. 4 shows interval between each crush lobe 10 with Reference numeral 12.As shown in Figure 4, crush lobe 8 is with equidistant 12 spaces.Spacing 12 like this, forms an interval less than single protruding 8 width between adjacent projection 10.Fig. 4 shows the embodiment that has the energy absorber 4 of roughly the same spacing 12 between crushable protruding 10 at each.Can expect to adopt other at interval.Littler interval and the projection of greater number 10 are changeable, to be used for increasing resistance to impact.Shown in Fig. 3 and 5, bossing 20, one crushing actuating sections 8 were positioned between the bossing 18,20 of front and back before each crush lobe 10 comprised a back bossing 18 and one.One crushing actuating section 8 preferably has and is tapered or the shape of cone, and connects with front and back jut 18,20.One or another back bossing 18 or preceding bossing 20 have bigger cross-sectional area.As shown in Figure 2, preceding bossing 20 has the cross-sectional area littler than back bossing 18, and like this, preceding bossing 20 is tending towards being pressed into back bossing 18.Before bossing 20 end at lobe front wall 19 places, the surperficial parallel and space of this antetheca and flange 14.Lobe front wall is along the longitudinal extension of energy absorber 4.The front surface of energy absorber 4 is suitable for contacting and deforming when energy absorber 4 moves in Automobile Plate with Automobile Plate, and the power of disperseing a bumper assembly and an object to bump and produced.
Fig. 3 is the view in the A-A ' cross section in Fig. 2, and it shows energy absorber 4 is connected to reinforcement by the hole (not shown) on the flange 14 of energy absorber 4 center beam of bumper 6 and crushing actuating section 8.Flange 14 shown in Fig. 2 and 3 is integral parts of energy absorber 4.As shown in Figure 3, this cross-sectional plane shows an embodiment, and the top of one of them projection 10 and projection 10 bottom are by being separated at horizontal upper wall and the lower wall 24,26 along the vertical axis extension of energy absorber respectively.Upper wall and lower wall 24,26 are connected with adjacent projection 10 respectively.As shown in Figure 3, last lower wall forms a groove 28, its extend past projection 10.Crush lobe 10 is long-pending mutually to become one, and each projection acts on simultaneously when bumping and is out of shape like this.The power that causes 10 distortion of a projection is delivered to adjacent projection 10 by last lower wall 24,26.
Fig. 4 is the top view of energy absorber 4, and it shows flange 14, crushing actuating section 8, and have the crushing projection cone 10 of the actuating section 8 of crushing and the interval 12 between the crushing projection cone 10.
Though the crushing projection cone has bevelled structure, the distance that they preferably have the degree of depth 35 or stretch out forward to the impact front of energy absorber from flange as shown in FIG..This degree of depth also helps at first impulsive force to be delivered to fast the crushing actuating section 8 of each crush lobe 10, thereby helping to reduce acts on pedestrian's impulsive force on one's body.In other words, provide crushing actuating section 8 and crush lobe 10 so that the energy when absorbing collision effectively, and then be delivered to the power of pedestrian lower leg when reducing to collide.By GMT material that uses different densities and/or the shape of passing through to change energy absorber, the angle of crushing projection cone, the crushing interval of projection cone and/or height, width and the length of aforesaid energy absorber can be regulated the energy absorber of concrete vehicle.In order to regulate the reaction of energy absorber for specific impact energy levels, these aspects can change.
Though disclosed the preferred embodiments of the present invention are through well-designed to satisfy described purpose, should be appreciated that in the design and the scope that do not break away from according to the appended invention that claim limited, can retrofit, change and revise the present invention.
Claims (10)
1, a kind of being suitable for being connected on the automobile in order to absorb the energy absorber of the power that is produced by collision, described energy absorber comprises a single-piece structure, this structure comprises a pad that is molded as by the fiber reinforced resinous material of strengthening, and this structure has a crushable bossing forward that is suitable for crushing when collision.
2, a kind of being suitable for being connected on the automobile as claimed in claim 1 in order to absorb the energy absorber of the power that is produced by collision, wherein said energy absorber has elongated shape, and be suitable for being installed to the front end of automobile, so that cross the width longitudinal extension of automobile.
3, a kind of being suitable for being connected on the automobile in order to absorbing the energy absorber of the power that is produced by collision as claimed in claim 2, wherein said energy absorber are suitable for pedestrian's shank is protected and had a mode of crushing efficiently.
4, a kind of being suitable for being connected on the automobile in order to absorb the energy absorber of the power that is produced by collision as claimed in claim 2, wherein said energy absorber is suitable for reducing the impact force that acts on pedestrian lower leg.
5, a kind of being suitable for being connected on the automobile in order to absorbing the energy absorber of the power that is produced by collision as claimed in claim 2, wherein said energy absorber absorb energy when being suitable for bumping with the low velocity traveling automobile that is less than or equal to 5MPH.
6, a kind of being suitable for being connected on the automobile in order to absorb the energy absorber of the power that is produced by collision as claimed in claim 2, wherein said energy absorber mainly is made of the independent integral unit that Heat forming or compression molded material are made.
7, a kind of being suitable for being connected on the automobile in order to absorbing the energy absorber of the power that is produced by collision as claimed in claim 6, wherein said before bossing comprise a plurality of crush lobes of projection forward.
8, a kind of being suitable for being connected on the automobile as claimed in claim 7 in order to absorb the energy absorber of the power that is produced by collision, wherein said energy absorber comprises that one is used for the support section of described crush lobe, and described support section is suitable for being connected on the center beam of bumper.
9, a kind of being suitable for being connected on the automobile as claimed in claim 8 in order to absorb the energy absorber of the power that is produced by collision, wherein said a plurality of crush lobe stretches out from support section, each described projection has forward-facing an antetheca, and at least one pair of adjacent projection has interconnective antetheca.
10, a kind of being suitable for being connected on the automobile as claimed in claim 9 in order to absorb the energy absorber of the power that is produced by collision, wherein each crush lobe comprises a crushing actuating section, and the part of described projection has the cross-sectional area different with another part of described projection.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40579302P | 2002-08-23 | 2002-08-23 | |
| US60/405,793 | 2002-08-23 | ||
| US10/617,219 | 2003-07-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1688464A true CN1688464A (en) | 2005-10-26 |
| CN100347008C CN100347008C (en) | 2007-11-07 |
Family
ID=35306282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038238004A Expired - Fee Related CN100347008C (en) | 2002-08-23 | 2003-07-31 | Pedestrian energy absorber for automotive vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100347008C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102582546A (en) * | 2012-04-09 | 2012-07-18 | 黄玉兰 | Front safety girder and rear safety girder capable of realizing rigidity and flexibility combined efficient buffering energy absorption |
| CN103201141A (en) * | 2010-10-29 | 2013-07-10 | 沙特基础创新塑料Ip私人有限责任公司 | Reinforced plastic energy absorber system with crush lobes and methods of making the same |
| CN103958925A (en) * | 2011-11-28 | 2014-07-30 | 帝人株式会社 | Impact resistant member |
| CN104010886A (en) * | 2011-12-13 | 2014-08-27 | 丰田铁工株式会社 | Vehicle bumper beam |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2012123392A (en) * | 2009-11-06 | 2013-12-20 | Шэйп Корп. | ENERGY ABSORBER WITH ACCESSORIES THAT MAKE A UNIFORM PEDESTRIAN SHOCK |
| CN101844550B (en) * | 2010-05-10 | 2012-02-08 | 清华大学 | Automobile bumper with two energy-absorbing modes |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4781612A (en) * | 1983-12-14 | 1988-11-01 | Amp Incorporated | Socket for single in-line memory module |
| US4961700A (en) * | 1988-12-15 | 1990-10-09 | Owens-Corning Fiberglas Corporation | Shaping means for the production of fiber-reinforced preform articles |
| ES2080146T3 (en) * | 1989-07-10 | 1996-02-01 | Ube Nitto Kasei Co | PRINTABLE SHEET MADE OF THERMOPLASTIC RESIN REINFORCED WITH FIBERS AND MOLDED ARTICLE THEREOF. |
| US5967592A (en) * | 1998-03-23 | 1999-10-19 | The Budd Company | Hollow FRP bumper |
| US6406081B1 (en) * | 2001-03-20 | 2002-06-18 | General Electric Company | Energy absorber system |
-
2003
- 2003-07-31 CN CNB038238004A patent/CN100347008C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201141A (en) * | 2010-10-29 | 2013-07-10 | 沙特基础创新塑料Ip私人有限责任公司 | Reinforced plastic energy absorber system with crush lobes and methods of making the same |
| US9050939B2 (en) | 2010-10-29 | 2015-06-09 | Sabic Global Technologies B.V. | Reinforced plastic energy absorber system and methods of making the same |
| CN103201141B (en) * | 2010-10-29 | 2016-03-09 | 沙特基础全球技术有限公司 | There is reinforced plastics energy absorber system and the manufacture method thereof of extruding lobe |
| US9434334B2 (en) | 2010-10-29 | 2016-09-06 | Sabic Global Technologies B.V. | Reinforced plastic energy absorber system and methods of making the same |
| US10005409B2 (en) | 2010-10-29 | 2018-06-26 | Sabic Global Technologies B.V. | Reinforced plastic energy absorber system and methods of making the same |
| CN103958925A (en) * | 2011-11-28 | 2014-07-30 | 帝人株式会社 | Impact resistant member |
| CN104010886A (en) * | 2011-12-13 | 2014-08-27 | 丰田铁工株式会社 | Vehicle bumper beam |
| CN104010886B (en) * | 2011-12-13 | 2016-05-04 | 丰田铁工株式会社 | Vehicular bumper beam |
| CN102582546A (en) * | 2012-04-09 | 2012-07-18 | 黄玉兰 | Front safety girder and rear safety girder capable of realizing rigidity and flexibility combined efficient buffering energy absorption |
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| Publication number | Publication date |
|---|---|
| CN100347008C (en) | 2007-11-07 |
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