WO2011126146A1 - 衝突エネルギー吸収構造体 - Google Patents

衝突エネルギー吸収構造体 Download PDF

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Publication number
WO2011126146A1
WO2011126146A1 PCT/JP2011/059223 JP2011059223W WO2011126146A1 WO 2011126146 A1 WO2011126146 A1 WO 2011126146A1 JP 2011059223 W JP2011059223 W JP 2011059223W WO 2011126146 A1 WO2011126146 A1 WO 2011126146A1
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WO
WIPO (PCT)
Prior art keywords
cross
collision energy
energy absorbing
section
absorbing structure
Prior art date
Application number
PCT/JP2011/059223
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
貴之 二塚
毅 藤田
Original Assignee
Ｊｆｅスチール株式会社
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 Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to KR1020127026307A priority Critical patent/KR101427020B1/ko
Priority to CN201180017895.4A priority patent/CN102834641B/zh
Publication of WO2011126146A1 publication Critical patent/WO2011126146A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
    • F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
    • F16F7/122—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure characterised by corrugations, e.g. of rolled corrugated material

Definitions

  • the present invention relates to a collision energy absorbing structure used for automobiles and the like.
  • a vehicle body such as an automobile is provided with a structure that deforms and absorbs collision energy in the event of a collision in order to mitigate a collision with an occupant or the vehicle body at the time of the collision.
  • a collision energy absorbing structure As performance required for such a collision energy absorbing structure, from the viewpoint of reducing the weight of the vehicle body in consideration of recent environmental problems, it is required to increase the energy absorption efficiency and make the cross section compact or thin.
  • Such a collision energy absorption structure is required to have high energy absorption efficiency, that is, the deformation resistance load is highly stable even after deformation starts and has high energy absorption ability. Since the collision energy absorbing structure cannot sufficiently absorb the collision energy when the deformation at the time of collision is unstable deformation as shown in FIG. 21 (a), as shown in FIG. 21 (b), large and small concentric circles are formed. It is made of a tubular structure and absorbs collision energy by plastic deformation while the small diameter tube is immersed in the large diameter tube with respect to the collision load in the axial direction (immersion type; for example, Patent Document 1), or FIG. As shown in (c), a structure in which the structure is plastically deformed in a bellows shape against an axial collision load (for example, Patent Documents 2 to 7) is required.
  • Patent Document 2 is a polygonal cross section provided with a recess in the cross section of the structure, and Patent Document 3 has a radial intermediate beam connecting each corner portion from the center of the cross section.
  • Patent Document 4 has an 8-shaped cross-sectional structure, and both increase the cross-sectional line length and the number of ridge lines to obtain a structure with good energy absorption efficiency.
  • Patent document 5 improves collision absorption performance by providing a filler inside a structure.
  • Patent Documents 6 and 7 are provided with concavities and convexities in the vertical direction with respect to the axial direction mainly subjected to the collision load, and are continuously buckled even when receiving an axial impact including an oblique load.
  • the deformation shape is controlled so that the bellows-like plastic deformation shown in FIG.
  • Patent Document 1 has a complicated structure, which causes an increase in the molding process and has problems in cost and productivity.
  • Patent Documents 2 to 7 that are plastically deformed in a bellows shape have the following problems.
  • Patent Document 2 is effective as a method for improving energy absorption efficiency while effectively utilizing a limited space, but greatly buckles when subjected to an axial impact including an oblique load, The deformation load may not be stable, and in such a case, energy absorption efficiency is reduced.
  • the present invention has been made in view of the above points, the structure is not complicated, press working is possible, lightweight and compact, a stable deformed shape is obtained, and the resistance load in the deformation process It is an object of the present invention to provide a collision energy absorption structure that is highly stable and has high energy absorption efficiency.
  • a collision energy absorbing structure that is cylindrical and deforms in the axial direction to absorb collision energy,
  • the cross-sectional shape of the cross section perpendicular to the axial direction is a polygon that is point-symmetric and non-symmetric with respect to the center of the cross-section, and the aspect ratio when the outer shape of the cross-section is a square is less than 1.5.
  • a collision energy absorbing structure characterized in that a ratio of lengths of adjacent sides among polygon sides constituting a cross section is 2.3 or less.
  • the cross-sectional shape of the cross section perpendicular to the axial direction is point symmetric with respect to the center of the cross section and non-axisymmetric, and the aspect ratio is less than 1.5 when the outer shape of the cross section is rectangular.
  • the ratio of the lengths of adjacent sides among the sides of the polygon forming the cross section is 2.3 or less, a stable deformed shape can be obtained. Therefore, a collision energy absorption structure having high energy absorption efficiency can be obtained by pressing without impairing productivity, and the structure can be made compact and lightweight.
  • FIG. 1 shows a collision energy absorbing structure according to an embodiment of the present invention, in which (a) is a perspective view and (b) is a cross-sectional view.
  • the collision energy absorbing structure is basically formed of a cylindrical body, and one end (for example, the upper end) is a collision tip, and collides with the collision tip. When an object collides, it is deformed in the direction of the axis L to absorb collision energy.
  • the shape of the cross section perpendicular to the direction of the axis L is a polygon that is point-symmetric and non-axisymmetric with respect to the center O of the cross section.
  • the figure shows a case where the cross-sectional shape is a hexagon including a recess.
  • the shape of the cross section perpendicular to the axis L into a polygon like this, it can be produced by press working and the cross section line length can be made long, so that the collision performance is improved in a limited space. be able to.
  • the load at the time of collision is not limited to being input in the axial direction, for example, and it is assumed that an oblique load having an angle with respect to the axial direction is received.
  • the deformation of the member becomes unstable due to large buckling or local bending, the deformation load is reduced and the energy absorption ability is remarkably reduced, but the cross section perpendicular to the axis L of the cylindrical body
  • point buckling and non-linear symmetric cause deviation in the progress of buckling on opposite sides, and it is difficult for large deformations such as buckling, lying down, and folding with a large period to occur.
  • the quadrilateral R forming the polygonal outline constituting the cross section has an aspect ratio of less than 1.5.
  • the aspect ratio is a value of long side / short side (a / b in the example in the figure).
  • the aspect ratio is 1, and the aspect ratio is always 1 or more.
  • the ratio of the lengths of adjacent sides among the sides of the polygon constituting the cross section is 2.3 or less.
  • the ratio of the lengths of adjacent sides is the value of the longer side / shorter side.
  • the ratio of the lengths of the adjacent sides is 1, and the ratio of the lengths of the adjacent sides is always 1 or more.
  • the combination having the maximum ratio of the lengths of adjacent sides is a combination of the side L1 and the side L2 (L1> L2), and L1 / L2 ⁇ 2.3.
  • the ratio of the lengths of adjacent sides among the sides of the polygon constituting the cross section is 2.3 or less is that the deformation form is stabilized thereby. This is probably because large deformation is likely to occur in the longer side of the adjacent sides, and in order to suppress such large deformation, the side of the shorter side of the adjacent sides This is probably because the length is important and there is an optimal ratio between these adjacent sides.
  • the collision energy absorbing structure is tapered in the axial direction as shown in FIG.
  • the taper in this case is preferably formed so as to spread from the front end (collision front end) to the rear end, as shown in the figure. This is considered to be because it is possible to specify the part where the deformation starts by attaching a taper, and the deformation starts stably.
  • a part where deformation starts similarly by forming a notched shape N such as a notch at the tip (collision tip), and stably start the deformation. be able to.
  • the collision energy absorbing structure of the present embodiment is preferably configured by press-molding a metal plate.
  • the metal plate to be applied include a hot-rolled steel plate, a cold-rolled steel plate, a plated steel plate obtained by subjecting a steel plate to electroplating such as electrogalvanizing or hot-dip galvanizing, and a stainless steel plate (SUS).
  • a hot dip galvanized steel sheet an alloying treatment may be performed.
  • the plated steel sheet may be further subjected to an organic film treatment after plating.
  • a steel plate having a tensile strength of 270 to 1500 MPa is preferable.
  • other metal materials such as aluminum, magnesium, and these alloys other than a steel plate, can also be used.
  • one metal plate shown in (a) is formed as shown in (b) using a die and a die made of a punch, and this is made into a closed cross-section by bending, and the end portions are aligned. Are joined to obtain the structure shown in (c).
  • the die (die and punch) used for press molding is the above-mentioned cross-sectional shape (a point-symmetrical and non-axisymmetric polygon with respect to the center of the cross-section, and the aspect ratio when the outer shape of the cross-section is a rectangle) Is less than 1.5, and the ratio of the lengths of adjacent sides among the sides of the polygon forming the cross section is 2.3 or less).
  • FIGS. 4 and 5 the case where a structure is manufactured by manufacturing and bonding a molded part having a predetermined cross-sectional shape from one or two metal plates has been described. However, three or more metal plates are used. It is also possible to form the respective parts by using and to manufacture the structure by joining them. As methods for joining the end faces, various methods such as spot welding, laser welding, arc welding, caulking, rivet joining, and application of an adhesive can be employed.
  • the characteristics of the collision energy absorption structure of various shapes were grasped by simulation.
  • general-purpose dynamic explicit software LS-DYNA ver. 971 was used for the simulation.
  • the applied material was a steel plate having a tensile strength of 440 MPa and a plate thickness of 1.6 mm.
  • a flat indenter without curvature was caused to collide at a speed of 15 km / h. The crushing performance of time was simulated.
  • Examples 1 to 7 of the present invention which are within the scope of the present invention, are plastically deformed continuously and stably in a bellows shape during crushing, and the average load per unit weight during crushing is It was confirmed that the absorption energy efficiency was high and high.
  • Comparative Examples 1 to 8 outside the scope of the present invention it was confirmed that bending in the axial direction and buckling with a large period occurred, the deformed shape was unstable, and the average load per unit weight was low. It was done.
  • the cross-sectional shape of the cross section perpendicular to the axial direction is a point-symmetrical and non-axisymmetric polygon with respect to the center of the cross-section as in the present invention, and the outline of the cross-section is a rectangle
  • the aspect ratio is less than 1.5 and the ratio of the lengths of adjacent sides among the polygon sides constituting the cross section is 2.3 or less, a stable deformed shape can be obtained, and the resistance load It has been confirmed that a collision energy absorption structure with high energy absorption efficiency and high energy absorption efficiency can be obtained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Vibration Dampers (AREA)
  • Body Structure For Vehicles (AREA)
PCT/JP2011/059223 2010-04-08 2011-04-07 衝突エネルギー吸収構造体 WO2011126146A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020127026307A KR101427020B1 (ko) 2010-04-08 2011-04-07 충돌 에너지 흡수 구조체
CN201180017895.4A CN102834641B (zh) 2010-04-08 2011-04-07 碰撞能量吸收结构体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010089202A JP4930620B2 (ja) 2010-04-08 2010-04-08 衝突エネルギー吸収構造体
JP2010-089202 2010-04-08

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Publication Number Publication Date
WO2011126146A1 true WO2011126146A1 (ja) 2011-10-13

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JP (1) JP4930620B2 (zh)
KR (1) KR101427020B1 (zh)
CN (1) CN102834641B (zh)
WO (1) WO2011126146A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014073084A1 (ja) * 2012-11-08 2014-05-15 Ｊｆｅスチール株式会社 衝撃吸収部材

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6156514B2 (ja) * 2013-11-27 2017-07-05 新日鐵住金株式会社 衝撃吸収部品
CN103982208A (zh) * 2014-05-19 2014-08-13 辽宁工程技术大学 矿用内外翻转式抗让吸能防冲装置
JP6044624B2 (ja) * 2014-12-17 2016-12-14 マツダ株式会社 車両用フレーム構造
CN107606019B (zh) * 2017-08-09 2019-06-21 西北工业大学 一种具有高效缓冲吸能特性的双层端封双翻转吸能结构
JP7238867B2 (ja) * 2020-08-18 2023-03-14 Ｊｆｅスチール株式会社 自動車用衝突エネルギー吸収部品、該自動車用衝突エネルギー吸収部品の製造方法
US20230356680A1 (en) 2020-10-20 2023-11-09 Nippon Steel Corporation Impact absorbing member
CN114857193B (zh) * 2022-04-19 2023-04-14 福建工程学院 一种易于拆装且三维自锁的卡槽式薄壁管吸能***

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JP2006123887A (ja) * 2004-09-28 2006-05-18 Aisin Seiki Co Ltd 車両の衝撃吸収具及び車両の衝撃吸収構造
JP2006207725A (ja) * 2005-01-28 2006-08-10 Sumitomo Metal Ind Ltd 衝撃吸収部材
JP2009096225A (ja) * 2007-10-12 2009-05-07 Kobe Steel Ltd エネルギー吸収部材

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JP4412282B2 (ja) * 2003-07-28 2010-02-10 住友金属工業株式会社 衝撃吸収部材
JP4280153B2 (ja) * 2003-11-28 2009-06-17 キョーラク株式会社 車両用衝撃吸収体
JP4471904B2 (ja) 2005-08-01 2010-06-02 豊田鉄工株式会社 自動車用バンパービーム
JP5011516B2 (ja) 2007-07-20 2012-08-29 キョーラク株式会社 車両用衝撃吸収体
JP5330674B2 (ja) * 2007-11-05 2013-10-30 豊田鉄工株式会社 クラッシュボックス
JP2009227037A (ja) * 2008-03-21 2009-10-08 Toyota Motor Corp 車両のバンパ構造及びエネルギ吸収体
KR101010177B1 (ko) * 2008-05-14 2011-01-20 성준엽 자동차용 에너지 업소버

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006123887A (ja) * 2004-09-28 2006-05-18 Aisin Seiki Co Ltd 車両の衝撃吸収具及び車両の衝撃吸収構造
JP2006207725A (ja) * 2005-01-28 2006-08-10 Sumitomo Metal Ind Ltd 衝撃吸収部材
JP2009096225A (ja) * 2007-10-12 2009-05-07 Kobe Steel Ltd エネルギー吸収部材

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014073084A1 (ja) * 2012-11-08 2014-05-15 Ｊｆｅスチール株式会社 衝撃吸収部材

Also Published As

Publication number Publication date
CN102834641A (zh) 2012-12-19
JP2011218935A (ja) 2011-11-04
JP4930620B2 (ja) 2012-05-16
KR20120135314A (ko) 2012-12-12
CN102834641B (zh) 2015-07-08
KR101427020B1 (ko) 2014-08-05

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