JP2011207264A - Reinforcing structure of collision energy absorbing member of automobile - Google Patents

Reinforcing structure of collision energy absorbing member of automobile Download PDF

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JP2011207264A
JP2011207264A JP2010074501A JP2010074501A JP2011207264A JP 2011207264 A JP2011207264 A JP 2011207264A JP 2010074501 A JP2010074501 A JP 2010074501A JP 2010074501 A JP2010074501 A JP 2010074501A JP 2011207264 A JP2011207264 A JP 2011207264A
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collision energy
energy absorbing
absorbing member
front side
automobile
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JP5533128B2 (en
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Yuichi Tokita
裕一 時田
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JFE Steel Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing structure of a collision energy absorbing member of an automobile allowing effective improvement of collision energy absorbing performance of the collision energy absorbing member such as a front side member of the automobile.SOLUTION: In the collision energy absorbing member (the front side member, etc.) 12 including a U-shaped cross section with a fringe having an opened end, a clip-shaped patch member 13 prepared by bending a metal plate material is inserted into a portion P which is predicted to deform most on an opened end side of the collision energy absorbing member 12 when impact force of a longitudinal direction is applied to the collision energy absorbing member 12, and the patch member 13 is joined by spot-welding.

Description

本発明は、自動車の衝突時の衝突エネルギーを吸収してキャビン（客室）への衝撃力を緩和する衝突エネルギー吸収部材（衝撃吸収部材）の性能を向上させるための、自動車の衝突エネルギー吸収部材の補強構造に関するものである。   The present invention relates to a collision energy absorbing member for an automobile for improving the performance of a collision energy absorbing member (impact absorbing member) that absorbs the collision energy at the time of a car collision and relaxes the impact force on the cabin (cabin). The present invention relates to a reinforcing structure.

自動車の衝突時の衝突エネルギーを吸収してキャビンへの衝撃力を緩和することによって乗員の保護を図るためには、例えばエンジンルームやトランクルームといったキャビン以外のスペースを優先的に潰すことが有効である。そこで、自動車の車体の前部、後部あるいは側部等の適切な個所に、衝突エネルギー吸収部材が配置され、衝突時の衝撃荷重が負荷されると、衝突エネルギー吸収部材が軸方向（衝突エネルギー吸収部材の長手方向）へ変形することによって衝突エネルギーを吸収するようになっている。このような衝突エネルギー吸収部材として、フロントサイドメンバー、サイドシル、リアサイドメンバ等が知られている（例えば、特許文献１参照）。   In order to protect passengers by absorbing the collision energy at the time of automobile collision and reducing the impact force on the cabin, it is effective to preferentially crush spaces other than the cabin, such as the engine room and trunk room, for example. . Therefore, when a collision energy absorbing member is disposed at an appropriate location such as the front, rear, or side of an automobile body and an impact load is applied during a collision, the collision energy absorbing member is axially moved (collision energy absorbing). The collision energy is absorbed by being deformed in the longitudinal direction of the member. As such a collision energy absorbing member, a front side member, a side sill, a rear side member, and the like are known (see, for example, Patent Document 1).

このような衝突エネルギー吸収部材について、以下では、フロントサイドメンバーを例にして述べることにする。   Such a collision energy absorbing member will be described below by taking a front side member as an example.

フロントサイドメンバーは、図１（ａ）に示すように、キャビン１０より前方の車体を構成する主要骨格１１であり、クワガタの大顎のように前方に飛び出した二本のフレーム（骨格）で、ここにエンジンやサスペンション等が取り付けられるとともに、衝突時の衝撃（衝突エネルギー）を吸収する役割を与えられている。   As shown in FIG. 1 (a), the front side member is a main skeleton 11 constituting the vehicle body in front of the cabin 10, and has two frames (skeletons) protruding forward like the chin of the stag beetle. Here, an engine, a suspension, and the like are attached, and a role of absorbing impact (collision energy) at the time of collision is given.

なお、フロントサイドメンバー１１は、通常、上部が開放された略Ｕ字形の横断面を有しているので、ここでは、図１（ｂ−１）に斜視図、図１（ｂ−２）に図１（ｂ−１）のＡ−Ａ断面図を示すような、鍔部１２ａの付いたＵ字形の横断面（鍔付きＵ字形横断面）を備えた形状にモデル化したフロントサイドメンバー１２で説明することにする。   Since the front side member 11 usually has a substantially U-shaped cross section with an open top, here, FIG. 1 (b-1) is a perspective view and FIG. 1 (b-2) is a perspective view. A front side member 12 modeled into a shape having a U-shaped cross section with a flange 12a (a U-shaped cross section with a hook) as shown in the A-A cross section of FIG. I will explain.

ここで、自動車の衝突時の衝撃吸収性能（衝突エネルギー吸収性能）については、例えばオフセット前面衝突において、ギャビン１０まわりの変形を抑えるために、衝突による変形を抑え、かつ衝突吸収エネルギーを向上させるには、フロントサイドメンバー１２が長手方向に折れ難くかつ衝突エネルギーの吸収量が大きくなるような構造であることが望ましい。   Here, with regard to impact absorption performance (collision energy absorption performance) at the time of automobile collision, for example, in order to suppress deformation around the Gavin 10 in an offset frontal collision, to suppress deformation due to collision and to improve collision absorption energy. It is desirable that the front side member 12 has a structure in which the front side member 12 is not easily folded in the longitudinal direction and the amount of collision energy absorbed is large.

そこで、このような構造にするために、フロントサイドメンバー１２全体の板厚を厚くしたり、図２（ａ）、（ｂ）に示すように、フロントサイドメンバー１２とほぼ同じ大きさのＵ字形断面を有する補強部材１９をフロントサイドメンバー１２の内側に重合固着したりすることが行われている。   Therefore, in order to make such a structure, the front side member 12 as a whole is made thicker or, as shown in FIGS. 2 (a) and 2 (b), a U-shape having almost the same size as the front side member 12. A reinforcing member 19 having a cross section is superposed and fixed inside the front side member 12.

特開２００８−１５５７４９号公報JP 2008-155749 A

しかしながら、フロントサイドメンバーの衝突エネルギー吸収性能を向上させるために、フロントサイドメンバー全体の板厚を厚くしたり、フロントサイドメンバーとほぼ同じ大きさのＵ字形断面を有する補強部材をフロントサイドメンバーの内側に重合固着したりする方法は、車体の重量が増加し、燃費の観点から好ましくない。   However, in order to improve the collision energy absorption performance of the front side member, the thickness of the entire front side member is increased, or a reinforcing member having a U-shaped cross section approximately the same size as the front side member is provided on the inner side of the front side member. The method of polymerizing and fixing to the resin increases the weight of the vehicle body and is not preferable from the viewpoint of fuel consumption.

本発明は、上記のような事情に鑑みてなされたものであり、自動車のフロントサイドメンバー等の衝突エネルギー吸収部材について、その衝突エネルギー吸収性能を効果的に向上させることができる、自動車の衝突エネルギー吸収部材の補強構造を提供することを目的とするものである。   The present invention has been made in view of the circumstances as described above, and it is possible to effectively improve the collision energy absorption performance of a collision energy absorbing member such as a front side member of an automobile. It aims at providing the reinforcement structure of an absorption member.

上記課題を解決するために、本発明は以下の特徴を有している。   In order to solve the above problems, the present invention has the following features.

［１］自動車の衝突エネルギー吸収部材で、一端が開放された鍔付きＵ字形横断面を有する衝突エネルギー吸収部材において、該衝突エネルギー吸収部材に長手方向の衝撃力が加わった際に当該衝突エネルギー吸収部材の開放端側で最も変形すると予測される個所に対して、金属板材で作製したパッチ部材を当てて固着したことを特徴とする自動車の衝突エネルギー吸収部材の補強構造。   [1] A collision energy absorbing member of an automobile having a hooked U-shaped cross section with one end opened. When a longitudinal impact force is applied to the collision energy absorbing member, the collision energy absorbing member A reinforcing structure for a collision energy absorbing member of an automobile, wherein a patch member made of a metal plate is applied and fixed to a portion predicted to be most deformed on the open end side of the member.

［２］前記パッチ部材は、金属板材を折り曲げて作製したクリップ式パッチ部材であることを特徴とする前記［１］に記載の自動車の衝突エネルギー吸収部材の補強構造。   [2] The structure for reinforcing a collision energy absorbing member for an automobile according to [1], wherein the patch member is a clip-type patch member manufactured by bending a metal plate.

［３］前記パッチ部材は、金属板材を折り曲げて、くの字形断面にした部品を２枚組み合わせたパッチ部材であることを特徴とする前記［１］に記載の自動車の衝突エネルギー吸収部材の補強構造。   [3] Reinforcement of a collision energy absorbing member for automobiles according to [1], wherein the patch member is a patch member in which two metal plate members are bent to form a U-shaped cross section. Construction.

本発明においては、自動車の鍔付きＵ字形横断面を備えた衝突エネルギー吸収部材について、その衝突エネルギー吸収性能を効果的に向上させることができる。   In the present invention, the collision energy absorbing performance of a collision energy absorbing member having a U-shaped cross section with a flange of an automobile can be effectively improved.

フロントサイドメンバーを示す図である。It is a figure which shows a front side member. 従来技術を示す図である。It is a figure which shows a prior art. 本発明の一実施形態における変形予測シミュレーションを示す図である。It is a figure which shows the deformation | transformation prediction simulation in one Embodiment of this invention. 本発明の一実施形態における補強構造を示す図である。It is a figure which shows the reinforcement structure in one Embodiment of this invention. 本発明の一実施形態における他の補強構造を示す図である。It is a figure which shows the other reinforcement structure in one Embodiment of this invention. 本発明の実施例１におけるフロントサイドメンバーを示す図である。It is a figure which shows the front side member in Example 1 of this invention. 本発明の実施例１における平均崩壊荷重を示す図である。It is a figure which shows the average collapse load in Example 1 of this invention.

本発明の一実施形態を図面に基づいて説明する。なお、ここでも、図１（ｂ）に示したモデル化したフロントサイドメンバー１２を対象にして述べることにする。   An embodiment of the present invention will be described with reference to the drawings. Here again, the modeled front side member 12 shown in FIG. 1B will be described.

まず、本発明の一実施形態においては、フロントサイドメンバー１２に対して長手方向に衝撃力が加わった際に、鍔付きＵ字形横断面の開放端側（ここでは、上端側）で最も変形する個所を有限要素法によるシミュレーション計算によって予測する。   First, in one embodiment of the present invention, when an impact force is applied to the front side member 12 in the longitudinal direction, it is most deformed on the open end side (here, the upper end side) of the U-shaped cross section with a hook. The location is predicted by simulation calculation by the finite element method.

その一例を図３に示す。ここでは、フロントサイドメンバー１２の材質は強度が５９０ＭＰａ級の鋼であるとし、図３（ａ）に示すように、フロントサイドメンバー１２の後端を固定した状態で、先端部の下端側のＳ点に衝撃力による１ｍ／ｓの強制変位を与えている。   An example is shown in FIG. Here, it is assumed that the material of the front side member 12 is steel having a strength of 590 MPa class, and as shown in FIG. 3A, the S on the lower end side of the front end portion is fixed with the rear end of the front side member 12 fixed. A forced displacement of 1 m / s due to impact force is given to the point.

その結果、図３（ｂ）に、Ｓ点が４０ｍｍ変位した際の塑性ひずみ分布を示すように、開放端側では図中のＰ点において最も塑性ひずみが大きい（最も変形する）ことが分かる。   As a result, as shown in FIG. 3B, the plastic strain distribution when the point S is displaced by 40 mm shows that the plastic strain is the largest (the most deformed) at the point P in the drawing on the open end side.

そこで、開放端側での最大変形個所であるＰ点に対して、図４（ａ）に示すように、鉄鋼やアルミ等の金属板材を曲げ加工にて作製したクリップ状のパッチ部材１３をフロントサイドメンバー１２の長手方向端部から差し込み、少なくとも鍔部１２ａと縦壁部の２個所をスポット溶接で接合する。これにより、図４（ｂ−１）に斜視図、図４（ｂ−２）に図４（ｂ−１）のＡ−Ａ断面図を示すように、Ｐ点とその近傍がクリップ状パッチ部材１３で補強された構造となる。   Therefore, as shown in FIG. 4A, a clip-like patch member 13 made by bending a metal plate material such as steel or aluminum is applied to the front point P which is the maximum deformation point on the open end side. It inserts from the longitudinal direction edge part of the side member 12, and joins at least 2 places of the collar part 12a and a vertical wall part by spot welding. 4B-1 is a perspective view, and FIG. 4B-2 is a cross-sectional view taken along the line AA of FIG. 4B-1. 13 is reinforced.

これによって、開放端側での最大変形個所Ｐ点とその近傍が変形し難くなり、フロントサイドメンバー１２の衝突エネルギーの吸収量が増加する。   As a result, the maximum deformation point P on the open end side and the vicinity thereof are not easily deformed, and the amount of collision energy absorbed by the front side member 12 increases.

しかも、Ｐ点とその近傍のみを覆うようなクリップ状パッチ部材１３を用いているので、図２に示したような、フロントサイドメンバー１２とほぼ同じ大きさのＵ字形断面を有する補強部材１９をフロントサイドメンバー１２に重合固着する場合に比べて、ほとんど車体重量の増加にはならない。見方を変えれば、クリップ状パッチ部材１３で補強する前と同程度の衝突エネルギー吸収量を有すればよい場合には、フロントサイドメンバー１２の板厚を薄くすることができ、重量を軽減することが可能になる。   In addition, since the clip-like patch member 13 that covers only the point P and the vicinity thereof is used, the reinforcing member 19 having a U-shaped cross section substantially the same size as the front side member 12 as shown in FIG. Compared to the case where the front side member 12 is fixed by polymerization, the weight of the vehicle body is hardly increased. In other words, if it is sufficient to have the same amount of collision energy absorption as before the reinforcement with the clip-shaped patch member 13, the thickness of the front side member 12 can be reduced and the weight can be reduced. Is possible.

なお、クリップ状パッチ部材１３の取り付けには手間がかかる場合には、クリップ状パッチ部材１３に代えて、図５に横断面図（図４（ｂ−１）のＡ−Ａ断面図に相当）を示すように、金属板材を折り曲げて、くの字形断面にした２枚の部品１４ａ、１４ｂを組み合わせた２枚組みパッチ部材１４を用いてもよい。この場合にも、少なくとも鍔部１２ａと縦壁部の２個所をスポット溶接で接合する。   In addition, when it takes time to attach the clip-shaped patch member 13, the cross-sectional view in FIG. 5 (corresponding to the AA cross-sectional view in FIG. 4B-1) is used instead of the clip-shaped patch member 13. As shown, a two-piece patch member 14 that is a combination of two parts 14a and 14b that are formed by bending a metal plate to have a cross-sectional shape may be used. Also in this case, at least two portions of the flange portion 12a and the vertical wall portion are joined by spot welding.

ちなみに、パッチ部材１３、１４の寸法については、フロントサイドメンバー１２の寸法やＰ点の予測変形量の大きさ等を考慮して定めればよい。   Incidentally, the dimensions of the patch members 13 and 14 may be determined in consideration of the dimensions of the front side member 12 and the predicted deformation amount of the P point.

このようにして、この実施形態においては、衝突エネルギー吸収部材であるフロントサイドメンバー１２の衝突エネルギー吸収性能を効果的に向上させることができる。   Thus, in this embodiment, the collision energy absorption performance of the front side member 12 that is a collision energy absorbing member can be effectively improved.

なお、この実施形態では、フロントサイドメンバーを例にして説明したが、本発明はこれに限定されるものではなく、それ以外の鍔付きＵ字形横断面を有する衝突エネルギー吸収部材にも適用できることはいうまでもない。   In this embodiment, the front side member has been described as an example, but the present invention is not limited to this, and can be applied to other collision energy absorbing members having a U-shaped cross section with a hook. Needless to say.

本発明の実施例１として、図６（ａ）に示すような、フロントサイドメンバー１２とほぼ同じ大きさのＵ字形断面を有する補強部材１９をフロントサイドメンバー１２の内側に重合固着した場合を従来例とし、図６（ｂ）に示すような、上記の本発明の一実施形態に基づいて、クリップ状パッチ部材１３によって補強した場合を本発明例として、両者の衝突エネルギー吸収性能（ここでは、平均崩壊荷重）が同等になるようにした際の両者の重量を比較した。なお、フロントサイドメンバー１２の材質は強度が５９０ＭＰａ級の鋼とし、板厚は２．３ｍｍとした。また、Ｕ字形断面補強部材１９とクリップ状パッチ部材１３の材質もそれぞれ強度が５９０ＭＰａ級の鋼とした。   As Example 1 of the present invention, a case where a reinforcing member 19 having a U-shaped cross section substantially the same size as the front side member 12 as shown in FIG. As an example, as shown in FIG. 6B, based on the embodiment of the present invention described above, the case where the clip-shaped patch member 13 is reinforced is used as an example of the present invention. The weights of the two when the average collapse load) was made equal were compared. The material of the front side member 12 was steel having a strength of 590 MPa, and the plate thickness was 2.3 mm. Further, the materials of the U-shaped cross-section reinforcing member 19 and the clip-like patch member 13 were steels each having a strength of 590 MPa.

その結果、従来例では、板厚が１．６ｍｍのＵ字形断面補強部材１９を用い、本発明例では、板厚が１．０ｍｍのクリップ状パッチ部材１３を用いた場合に、図７に示すように、両者の平均崩壊荷重がほぼ１５ｋＮと同等になった。これにより、本発明例においては、従来例に比べて２０％の軽量化が達成された。   As a result, the U-shaped cross-section reinforcing member 19 having a plate thickness of 1.6 mm is used in the conventional example, and the clip-like patch member 13 having a plate thickness of 1.0 mm is used in the present invention example as shown in FIG. Thus, both average collapse loads became equivalent to about 15 kN. Thereby, in the example of this invention, 20% of weight reduction was achieved compared with the prior art example.

これによって、本発明の有効性を確認することができた。   Thereby, the effectiveness of the present invention could be confirmed.

１０ キャビン（客室）
１１ フロントサイドメンバー
１２ フロントサイドメンバー（モデル化）
１２ａ 鍔部
１３ クリップ状パッチ部材
１４ ２枚組みパッチ部材
１４ａ、１４ｂ くの字形断面の部品
１９ Ｕ字形断面を有する補強部材 10 cabins (guest rooms)
11 Front side member 12 Front side member (modeling)
12a ridge part 13 clip-shaped patch member 14 two-piece set patch member 14a, 14b parts with a U-shaped cross section 19 reinforcing member having a U-shaped cross section

Claims (3)

自動車の衝突エネルギー吸収部材で、一端が開放された鍔付きＵ字形横断面を有する衝突エネルギー吸収部材において、該衝突エネルギー吸収部材に長手方向の衝撃力が加わった際に当該衝突エネルギー吸収部材の開放端側で最も変形すると予測される個所に対して、金属板材で作製したパッチ部材を当てて固着したことを特徴とする自動車の衝突エネルギー吸収部材の補強構造。   A collision energy absorbing member for automobiles having a U-shaped cross section with a hook that is open at one end. When a longitudinal impact force is applied to the collision energy absorbing member, the collision energy absorbing member is opened. A reinforcing structure for a collision energy absorbing member of an automobile, wherein a patch member made of a metal plate is applied and fixed to a portion predicted to be most deformed on the end side. 前記パッチ部材は、金属板材を折り曲げて作製したクリップ式パッチ部材であることを特徴とする請求項１に記載の自動車の衝突エネルギー吸収部材の補強構造。   The reinforcing structure for a collision energy absorbing member of an automobile according to claim 1, wherein the patch member is a clip type patch member produced by bending a metal plate. 前記パッチ部材は、金属板材を折り曲げて、くの字形断面にした部品を２枚組み合わせたパッチ部材であることを特徴とする請求項１に記載の自動車の衝突エネルギー吸収部材の補強構造。   2. The reinforcing structure for a collision energy absorbing member for an automobile according to claim 1, wherein the patch member is a patch member obtained by combining two parts each having a U-shaped cross section by bending a metal plate material.
JP2010074501A 2010-03-29 2010-03-29 Reinforcement structure of automobile collision energy absorbing member Expired - Fee Related JP5533128B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611058A4 (en) * 2017-04-10 2021-01-06 Nippon Steel Corporation Structural member for automobiles
CN112429085A (en) * 2020-12-07 2021-03-02 安徽江淮汽车集团股份有限公司 Automobile longitudinal beam structure and automobile
CN114932364A (en) * 2022-06-13 2022-08-23 山东舜晟冲压科技股份有限公司 Automatic clamping and welding equipment for connecting patches for processing longitudinal beams of carriage

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JPS52126517U (en) * 1976-03-22 1977-09-26
JPH0353381U (en) * 1989-09-30 1991-05-23
JP2004291754A (en) * 2003-03-26 2004-10-21 Nissan Diesel Motor Co Ltd Cab deformation preventive structure
JP2009190547A (en) * 2008-02-14 2009-08-27 Toyota Motor Corp Vehicle body structure

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611058A4 (en) * 2017-04-10 2021-01-06 Nippon Steel Corporation Structural member for automobiles
US11400800B2 (en) 2017-04-10 2022-08-02 Nippon Steel Corporation Structural member for automobiles
CN112429085A (en) * 2020-12-07 2021-03-02 安徽江淮汽车集团股份有限公司 Automobile longitudinal beam structure and automobile
CN114932364A (en) * 2022-06-13 2022-08-23 山东舜晟冲压科技股份有限公司 Automatic clamping and welding equipment for connecting patches for processing longitudinal beams of carriage
CN114932364B (en) * 2022-06-13 2023-12-19 山东舜晟冲压科技股份有限公司 Automatic welding equipment that presss from both sides of connection paster for longeron processing of carriage

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