JP2012148743A - Front vehicle-body structure for automobile - Google Patents

Front vehicle-body structure for automobile Download PDF

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JP2012148743A
JP2012148743A JP2011010808A JP2011010808A JP2012148743A JP 2012148743 A JP2012148743 A JP 2012148743A JP 2011010808 A JP2011010808 A JP 2011010808A JP 2011010808 A JP2011010808 A JP 2011010808A JP 2012148743 A JP2012148743 A JP 2012148743A
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vehicle
apron member
apron
wall
body structure
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JP5702161B2 (en
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Kan Senda
款 先田
Yuuri Shinkai
有里 新開
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a front vehicle-body structure for an automobile that effectively transmits a load during a vehicle collision to a front pillar by preventing falling-down of an apron member from the root of the same without causing the problem of an increase in vehicle-body weight and cost increase.SOLUTION: Stiffness breakpoints (a), b are provided on an inner wall of an apron member 3 in order to induce breaking deformation by input from the vehicle front. The stiffness breakpoints (a), b are arranged to be located between the center line C, passing through the axis of a strut tower 6, and the front end 4' of a front pillar 4.

Description

本発明は、車両衝突時の入力をサイドメンバからエプロンメンバを介してフロントピラーに伝達するようにした自動車の前部車体構造に関する。   The present invention relates to a front body structure of an automobile in which an input at the time of a vehicle collision is transmitted from a side member to a front pillar via an apron member.

自動車においては、車両衝突時のエネルギー吸収機能を高めることにより、車室への影響を回避する構造を採用している。例えば、特許文献1,2には、サイドメンバとエプロンメンバとを剛性部材により結合し、衝突時の入力をサイドメンバ,剛性部材を介してエプロンメンバからフロントピラーに分散させて伝達するようにしたエネルギー吸収構造が開示されている。   The automobile employs a structure that avoids the influence on the passenger compartment by enhancing the energy absorption function in the event of a vehicle collision. For example, in Patent Documents 1 and 2, the side member and the apron member are coupled by a rigid member, and the input at the time of collision is transmitted from the apron member to the front pillar via the side member and the rigid member. An energy absorbing structure is disclosed.

特開2006−213245号公報JP 2006-213245 A 特開2005−335619号公報JP 2005-335619 A

ところで、前記従来構造では、車両衝突時の入力によりエプロンメンバのカウル結合部が座屈変形し易いという懸念がある。このような座屈変形を抑制するには、エプロンメンバの板厚を大きくしたり、剛性,強度の高い鋼板に変更したりして補強することが考えられる。しかしながら、このようにすると、エプロンメンバ全体がフロントピラー結合部を起点に車内側に大きく倒れてしまうおそれがあり、衝突荷重をフロントピラーに効果的に伝達できなくなる。特に、エプロンメンバのフロントピラー結合部には、車体の組付け上の都合から上面視で隙間が生じることから、この隙間に起因してエプロンメンバが根元から車内側に倒れ易くなっている。また前記エプロンメンバの板厚を大きくしたり、高強度鋼板に変更したりすると車体重量及びコストアップを招くという問題が生じる。   By the way, in the conventional structure, there is a concern that the cowl coupling portion of the apron member is likely to buckle and deform due to input at the time of a vehicle collision. In order to suppress such buckling deformation, it is conceivable to reinforce by increasing the thickness of the apron member or changing to a steel plate having high rigidity and strength. However, if it does in this way, there exists a possibility that the whole apron member may fall greatly inside a vehicle from the front pillar coupling | bond part, and it becomes impossible to transmit a collision load to a front pillar effectively. In particular, the front pillar coupling portion of the apron member has a gap when viewed from above for the convenience of assembling the vehicle body, and the apron member easily falls from the root to the inside of the vehicle due to this gap. Further, if the thickness of the apron member is increased or changed to a high-strength steel plate, there arises a problem that the vehicle weight and cost are increased.

本発明は、前記従来の状況に鑑みてなされたもので、車体重量,コストアップの問題を招くことなく、エプロンメンバの根元からの倒れ込みを防止して車両衝突時の荷重をフロントピラーに確実に伝達できる自動車の前部車体構造を提供することを課題としている。   The present invention has been made in view of the above-described conventional situation, and prevents the apron member from collapsing from the base without incurring the problem of increasing the weight and cost of the vehicle body, so that the load at the time of the vehicle collision can be reliably applied to the front pillar. It is an object to provide a front body structure of an automobile that can be transmitted.

請求項1の発明は、車両前後方向に延びるサイドメンバと、該サイドメンバの上方に車両前後方向に延びるよう配設され、車幅方向内側に位置する内側壁部と外側に位置する外側壁部とを有する略中空形状のエプロンメンバと、該エプロンメンバの後端部に接続された車両上下方向に延びるフロントピラーと、前記エプロンメンバと前記サイドメンバとに架け渡して接続された結合部材と、前記エプロンメンバの内側壁部に接続されたストラットタワーとを備えた自動車の前部車体構造であって、前記エプロンメンバの内側壁部には、車両前方からの入力により折れ変形を誘発する剛性断点部が設けられ、該剛性断点部は、前記ストラットタワーの軸芯を通る中心線と前記フロントピラーの前端との間に位置するように配置されていることを特徴としている。   The invention according to claim 1 is a side member that extends in the vehicle longitudinal direction, an inner wall portion that is disposed above the side member in the vehicle longitudinal direction, and that is positioned on the inner side in the vehicle width direction and an outer wall portion that is positioned on the outer side An apron member having a substantially hollow shape, a front pillar connected to the rear end portion of the apron member and extending in the vehicle vertical direction, and a coupling member connected across the apron member and the side member, A front body structure of an automobile including a strut tower connected to an inner wall portion of the apron member, wherein the inner wall portion of the apron member has a rigidity breaking that induces bending deformation by an input from the front of the vehicle. A point portion is provided, and the rigid break point portion is disposed so as to be positioned between a center line passing through the axis of the strut tower and a front end of the front pillar. It is a symptom.

請求項2の発明は、請求項1に記載の自動車の前部車体構造において、前記剛性断点部は、前記エプロンメンバのストラットタワーの上面を跨いだ上側及び下側にそれぞれ設けられていることを特徴としている。   According to a second aspect of the present invention, in the front body structure of the automobile according to the first aspect, the rigid break points are respectively provided on the upper side and the lower side across the upper surface of the strut tower of the apron member. It is characterized by.

請求項1の発明に係る前部車体構造によれば、エプロンメンバの内側壁部に、ストラットタワーの中心線とフロントピラーの前端との間に位置するよう剛性断点部を設けたので、車両衝突時の入力によりエプロンメンバには剛性断点部を起点にして車内側への折れ変形が誘発されることとなり、エプロンメンバの折れ変形をコントロールすることが可能となる。これによりエプロンメンバの座屈変形を抑制できるとともに、フロントピラー結合部からの倒れ込みを抑制でき、衝突荷重をフロントピラーに効率よく伝達することができ、ひいては車室への影響を回避できる。   According to the front body structure of the first aspect of the present invention, since the rigid break point is provided on the inner wall of the apron member so as to be positioned between the center line of the strut tower and the front end of the front pillar, By the input at the time of collision, the apron member is induced to bend toward the inside of the vehicle starting from the rigid break point, and the apron member can be controlled to be bent. As a result, buckling deformation of the apron member can be suppressed, falling from the front pillar coupling portion can be suppressed, collision load can be efficiently transmitted to the front pillar, and influence on the passenger compartment can be avoided.

本発明では、エプロンメンバに剛性断点部を設けるだけの構造であるので、前述の板厚をアップしたり、材質を変更したりする場合のような車体重量,コストアップを招くことはない。   In the present invention, since the apron member has a structure in which only a rigid break point is provided, there is no increase in vehicle weight and cost as in the case where the plate thickness is increased or the material is changed.

請求項2の発明では、剛性断点部をストラットタワーの上面を跨いだエプロンメンバの上側及び下側に設けたので、剛性,強度の高いストラットタワーの変形が容易となり、エプロンメンバの座屈変形及び倒れ込みをより確実に抑制することができる。   In the invention of claim 2, since the rigid break points are provided on the upper and lower sides of the apron member straddling the upper surface of the strut tower, the strut tower having high rigidity and strength is easily deformed, and the apron member is buckled and deformed. In addition, the falling-down can be more reliably suppressed.

本発明の実施例1による自動車の前部車体の側面図である。1 is a side view of a front body of an automobile according to Embodiment 1 of the present invention. 前記前部車体の平面図である。It is a top view of the said front part vehicle body. 前記前部車体の断面図(図1のIII-III線断面図)である。FIG. 3 is a cross-sectional view of the front vehicle body (a cross-sectional view taken along line III-III in FIG. 1). 前記前部車体のエプロンメンバの分解斜視図である。It is a disassembled perspective view of the apron member of the front body. 前記エプロンメンバの折れ変形を示す模式図である。It is a schematic diagram which shows the bending deformation of the said apron member.

以下、本発明の実施の形態を添付図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図1ないし図5は、本発明の実施例1による自動車の前部車体を説明するための図である。   1 to 5 are views for explaining a front body of an automobile according to Embodiment 1 of the present invention.

図において、1は自動車の前部車体を示している。この前部車体1は、車両前後方向に延びる左,右のサイドメンバ2,2と、該左,右のサイドメンバ2の車幅方向外側の上方に配設された略中空形状をなすエプロンメンバ3,3と、該左,右のエプロンメンバ3の後端部3aに接続された車両上下方向に延びるフロントピラー4,4と、前記左,右のエプロンメンバ3と前記サイドメンバ2とに架け渡して接続された結合部材5,5と、前記左,右のエプロンメンバ3の内側に配設されたストラットタワー6,6とを備えている。   In the figure, reference numeral 1 denotes a front body of an automobile. The front vehicle body 1 includes left and right side members 2 and 2 extending in the vehicle front-rear direction, and a substantially hollow apron member disposed above the left and right side members 2 outside the vehicle width direction. 3, 3, the front pillars 4, 4 that are connected to the rear ends 3 a of the left and right apron members 3 and extend in the vehicle vertical direction, and the left and right apron members 3 and the side members 2. The connecting members 5 and 5 connected to each other and the strut towers 6 and 6 disposed inside the left and right apron members 3 are provided.

また前記前部車体1は、該前部車体1をエンジン室Aと車室Bとに画成するダッシュパネル(図示せず)及び前記左,右のエプロンメンバ3,3を結合するように延びるカウルパネル7とを備えている。このカウルパネル7は、車幅方向に延びる前壁7aと後壁7bとを底壁7cにより一体に結合した上方に開口する断面大略ハット形状のものであり、前壁7a,後壁7bの左,右フランジ部7dが前記左,右のエプロンメンバ3に結合されている。   The front vehicle body 1 extends so as to connect a dash panel (not shown) defining the front vehicle body 1 into an engine compartment A and a vehicle compartment B and the left and right apron members 3 and 3. A cowl panel 7 is provided. The cowl panel 7 has a generally hat-shaped cross-section that opens upward, in which a front wall 7a and a rear wall 7b extending in the vehicle width direction are joined together by a bottom wall 7c. The cowl panel 7 has a left side of the front wall 7a and the rear wall 7b. The right flange portion 7d is coupled to the left and right apron members 3.

前記カウルパネル7は、これの前壁7a,底壁7c部分が前記左,右のストラットタワー6の後側上方を覆うように配設されている。これによりエンジン室Aの前後長を縮小することにより、車室Bの拡大を図っている。   The cowl panel 7 is disposed so that the front wall 7a and the bottom wall 7c thereof cover the rear upper side of the left and right strut towers 6. As a result, the front and rear lengths of the engine compartment A are reduced to enlarge the compartment B.

前記左,右のサイドメンバ2は、前後方向に延びるフロント部2aと、該フロント部2aに続いて斜め下方に延びるキック部2bと、該キック部2bに続いて後方に延びるリヤ部2cとを有する。前記左,右のフロント部2a間にエンジンユニット(不図示)が搭載されており、前記左,右のキック部2b及びリヤ部2cの上面にフロアパネル(不図示)が配設されている。   The left and right side members 2 include a front portion 2a extending in the front-rear direction, a kick portion 2b extending obliquely downward following the front portion 2a, and a rear portion 2c extending rearward after the kick portion 2b. Have. An engine unit (not shown) is mounted between the left and right front parts 2a, and floor panels (not shown) are arranged on the upper surfaces of the left and right kick parts 2b and the rear part 2c.

前記フロントピラー4は、断面略ハット形状のピラーアウタ14と、略平板形状のピラーインナ15との間に断面略ハット形状のピラーリインホース16を配設し、これらを一体的に結合することにより上下方向に延びる閉断面を形成した構造を有する。   The front pillar 4 includes a pillar outer hose 16 having a substantially hat-shaped cross section disposed between a pillar outer 14 having a substantially hat-shaped cross section and a pillar inner 15 having a substantially flat plate shape. A closed cross section is formed.

前記結合部材5は、上下方向に延びる閉断面構造を有し、これの上端部5aが前記エプロンメンバ3の前端部3bに結合され、下端部5bが前記サイドメンバ2のフロント部2aに結合されている。   The coupling member 5 has a closed cross-sectional structure extending in the vertical direction, and an upper end portion 5a thereof is coupled to the front end portion 3b of the apron member 3, and a lower end portion 5b is coupled to the front portion 2a of the side member 2. ing.

これにより車両衝突時の荷重は、サイドメンバ2から結合部材5を介してエプロンメンバ3に分散されて伝達され、該エプロンメンバ3からフロントピラー4に伝達される。   Thereby, the load at the time of the vehicle collision is distributed and transmitted from the side member 2 to the apron member 3 through the coupling member 5, and is transmitted from the apron member 3 to the front pillar 4.

前記ストラットタワー6は、不図示の前輪懸架装置のショックアブソーバを支持する支持孔6cが形成された上壁部6aと、該上壁部6aから下方に大略スカート形状をなすよう延びるストラット本体6bとを有する。このストラットタワー6の上端部は前記エプロンメンバ3に結合されており、下端部は前記サイドメンバ2に結合されている。   The strut tower 6 includes an upper wall portion 6a in which a support hole 6c for supporting a shock absorber of a front wheel suspension (not shown) is formed, and a strut body 6b extending downwardly from the upper wall portion 6a so as to form a generally skirt shape. Have The upper end portion of the strut tower 6 is coupled to the apron member 3, and the lower end portion is coupled to the side member 2.

前記エプロンメンバ3は、車幅方向内側に位置する内側壁部と外側に位置する外側壁部とを有する大略中空角筒形状のものであり、詳細には、アウタメンバ10とインナメンバ11とを閉断面をなすよう結合した構造を有する。   The apron member 3 has a generally hollow rectangular tube shape having an inner wall portion positioned on the inner side in the vehicle width direction and an outer wall portion positioned on the outer side. Specifically, the outer member 10 and the inner member 11 are closed in cross section. It has the structure which joined so that.

前記アウタメンバ10は、上フランジ部10aと、該上フランジ部10aに続いて下方に屈曲して延びる外側壁10bと、該外側壁10bの下端から車内側に屈曲して延びる下側壁10cと、該下側壁10cの内端から下方に屈曲して延びる下フランジ部10dとを有する。   The outer member 10 includes an upper flange portion 10a, an outer wall 10b extending downwardly following the upper flange portion 10a, a lower side wall 10c extending bent from the lower end of the outer wall 10b toward the vehicle interior, And a lower flange portion 10d that bends and extends downward from the inner end of the lower side wall 10c.

前記インナメンバ11は、前記上フランジ部10aに溶接により結合された外フランジ部11aと、該外フランジ部11aに続いて車内側に延びる上側壁11bと、該上側壁11bの内端から下方に屈曲して延びる内側壁11cとを有し、該内側壁11cに続いて下方に延びる下フランジ部11dが前記下フランジ部10dに溶接により結合されている。   The inner member 11 includes an outer flange portion 11a joined to the upper flange portion 10a by welding, an upper side wall 11b extending inward of the vehicle following the outer flange portion 11a, and bent downward from an inner end of the upper side wall 11b. And a lower flange portion 11d extending downward following the inner wall 11c is joined to the lower flange portion 10d by welding.

前記エプロンメンバ3の内側壁部は、インナメンバ11の内側壁11c,下フランジ部11d及びアウタメンバ10の下フランジ部10dを含み、前記外側壁部は、アウタメンバ10の上フランジ部10a,外側壁10b及びインナメンバ11の外フランジ部11aを含む。   The inner wall portion of the apron member 3 includes an inner wall 11c, a lower flange portion 11d, and a lower flange portion 10d of the outer member 10, and the outer wall portion includes an upper flange portion 10a, an outer wall 10b, and an outer member 10. An outer flange portion 11a of the inner member 11 is included.

前記アウタメンバ10は、外側壁10bに続いて後方に延びる延長部10eを有し、該延長部10eは前記フロントピラー4のピラーアウタ14に溶接により結合されている。   The outer member 10 has an extension 10e extending rearward after the outer wall 10b, and the extension 10e is coupled to the pillar outer 14 of the front pillar 4 by welding.

また前記インナメンバ11は、内側壁11cに続いて後方に突出する後フランジ部11eを有し、該後フランジ部11eは前記ピラーインナ15とカウルパネル7のフランジ部7dとの結合部に重ね合わせて溶接により一体に結合されている。   The inner member 11 has a rear flange portion 11e that protrudes rearward after the inner wall 11c, and the rear flange portion 11e is overlapped and welded to a joint portion between the pillar inner 15 and the flange portion 7d of the cowl panel 7. Are coupled together.

前記左,右のエプロンメンバ3は、車両上方から見たとき、後端部3aに対して前端部3bが車内側に偏位するよう若干湾曲形成されている。また前記左,右の結合部材5は、上方から見たとき、エプロンメンバ3の前端部3bからサイドメンバ2に向かって車内方に湾曲形成されている。   When viewed from above the vehicle, the left and right apron members 3 are slightly curved so that the front end portion 3b is displaced toward the vehicle inner side with respect to the rear end portion 3a. The left and right connecting members 5 are curved inward from the front end 3b of the apron member 3 toward the side member 2 when viewed from above.

前記左,右のエプロンメンバ3の内側壁部には、車両前方からの入力により折れ変形を誘発する剛性断点部a,bが設けられている。   The left and right apron members 3 are provided with rigid break points a and b that induce bending deformation by an input from the front of the vehicle.

この各剛性断点部a,bは、前記ストラットタワー6の支持孔6cの軸芯を通る中心線Cと前記フロントピラー4の前端との間に位置するように配置されている。より詳細には、ストラットタワー6の中心線Cとカウルパネル7の前壁7aとの間に位置するように配置されている。   The respective rigid break points a and b are arranged so as to be positioned between a center line C passing through the axis of the support hole 6 c of the strut tower 6 and the front end of the front pillar 4. More specifically, the strut tower 6 is disposed between the center line C of the strut tower 6 and the front wall 7 a of the cowl panel 7.

前記各剛性断点部a,bは、前記エプロンメンバ3のストラットタワー6の上面6dを跨いだ上側及び下側に設けられており、詳細には以下の構造を有する。   The rigid break points a and b are provided on the upper side and the lower side across the upper surface 6d of the strut tower 6 of the apron member 3, and have the following structure in detail.

前記ストラットタワー6の上面6dより上側に設けられた剛性断点部aは、前記インナメンバ11の内側壁11cに車内側に膨出するよう形成されたビード11fの前縁により形成されている。   A rigid break point a provided above the upper surface 6d of the strut tower 6 is formed by a front edge of a bead 11f formed on the inner side wall 11c of the inner member 11 so as to bulge toward the vehicle interior side.

このビード11fは、上下方向に延びる縦ビード部11f′と、該縦ビード部11f′に続いて後方に延びる上下一対の横ビード部11f′′,11f′′とを有し、前記縦ビード部11f′の前縁が剛性断点部aとなっている。   The bead 11f has a vertical bead portion 11f ′ extending in the vertical direction and a pair of upper and lower horizontal bead portions 11f ″ and 11f ″ extending rearward after the vertical bead portion 11f ′. The leading edge of 11f 'is a rigid break point a.

前記ビード11fは、車両側方から見ると、前記カウルパネル7の前壁7aと後壁7bとに前後方向に架け渡すように配置され、かつ後端が前記フロントピラー4の前縁4′近傍に位置するよう配置されている。これによりエプロンメンバ3のカウルパネル7との結合剛性を高めることができ、カウルパネル7の座屈変形が抑制されており、かつフロントピラー4への入力伝達を高めている。   When viewed from the side of the vehicle, the bead 11f is disposed so as to span the front wall 7a and the rear wall 7b of the cowl panel 7 in the front-rear direction, and the rear end is in the vicinity of the front edge 4 'of the front pillar 4 It is arranged to be located in. Thereby, the joint rigidity with the cowl panel 7 of the apron member 3 can be increased, buckling deformation of the cowl panel 7 is suppressed, and input transmission to the front pillar 4 is enhanced.

前記ストラットタワー6の上面6dより下側に設けられた剛性断点部bは、前記アウタメンバ10の下フランジ10dに続いて下方に突出形成されたひれ状の突出部10fの前縁により形成されている。   A rigid break point b provided below the upper surface 6d of the strut tower 6 is formed by a front edge of a fin-like protrusion 10f that protrudes downward following the lower flange 10d of the outer member 10. Yes.

この突出部10fは、車両側方から見ると、ストラット本体6bにより覆われており、前記縦ビード部11f′の下方に位置するよう配置されている。   When viewed from the side of the vehicle, the projecting portion 10f is covered with the strut body 6b and is disposed below the vertical bead portion 11f ′.

そして各剛性断点部a,bは、車両側方から見ると、該断点部a,b同士を結ぶ線が中心線Cに対して後下方に傾斜し、かつ大略直線上に位置するよう配置されている。   When viewed from the side of the vehicle, each of the rigid break points a and b is located so that the line connecting the break points a and b is inclined rearward and downward with respect to the center line C and is substantially on a straight line. Has been placed.

本実施例によれば、エプロンメンバ3の内側壁部を形成する内側壁11c及び下フランジ部10dにそれぞれビード11f,突出部10fを形成して剛性断点部a,bを設け、この剛性断点部a,bをストラットタワー6の中心線Cとフロントピラー4の前端との間に配置したので、車両衝突時の入力によりエプロンメンバ3には剛性断点部a,bを起点とした車内側への折れ変形が誘発されることとなり、エプロンメンバ3の折れ変形をコントロールすることが可能となる。これにより、エプロンメンバ3のカウルパネル7結合部分における座屈変形を抑制できるとともに、フロントピラー結合部である後端部3aからの倒れ込みを抑制でき、衝突荷重をフロントピラー4に効率よく伝達することができ、ひいては車室への影響を回避できる。   According to the present embodiment, the bead 11f and the protruding portion 10f are formed on the inner wall 11c and the lower flange portion 10d that form the inner wall of the apron member 3, respectively, and the rigid break points a and b are provided. Since the point portions a and b are arranged between the center line C of the strut tower 6 and the front end of the front pillar 4, the apron member 3 is provided with a vehicle having the rigid break points a and b as the starting points by the input at the time of vehicle collision. Inward bending deformation is induced, and the bending deformation of the apron member 3 can be controlled. Thereby, buckling deformation at the coupling part of the cowl panel 7 of the apron member 3 can be suppressed, and the collapse from the rear end part 3a which is the front pillar coupling part can be suppressed, and the collision load can be efficiently transmitted to the front pillar 4. Can be avoided, and as a result, the influence on the passenger compartment can be avoided.

ここで、エプロンメンバ3のフロントピラー結合部には、車体の組み付け上の都合から隙間が生じ、これが起因してエプロンメンバが根元から大きく倒れる易くなっている。本実施例では、エプロンメンバ3がこれの中途部に設定した剛性断点部a,bで折れ変形することから、前記根元での変形量を小さくできる。即ち、図5に示すように、エプロンメンバ3がこれの中途部3′と根元3′′とで車内側に2段階に折れ変形し、中途部3′の変形が根元3′′の変形を抑制するように作用する。その結果、車室への影響をより確実に抑制できる。   Here, a gap is generated in the front pillar coupling portion of the apron member 3 for convenience of assembly of the vehicle body, and this causes the apron member to easily fall down from the base. In this embodiment, since the apron member 3 is bent and deformed at the rigid break points a and b set in the middle of the apron member, the amount of deformation at the base can be reduced. That is, as shown in FIG. 5, the apron member 3 is bent and deformed in two steps at the midway portion 3 ′ and the root portion 3 ″, and the deformation of the midway portion 3 ′ deforms the root portion 3 ″. Acts to suppress. As a result, the influence on the passenger compartment can be more reliably suppressed.

本実施例の剛性断点部a,bは、前記エプロンメンバ3にビード11f,突出部10eを形成するだけの構造であるので、従来のようなエプロンメンバの板厚をアップしたり、高剛性の材質に変更したりする場合のような車体重量,コストアップを招くことはなく、軽量化,低コスト化に貢献できる。   The rigid break points a and b of the present embodiment have a structure in which the bead 11f and the protruding portion 10e are only formed on the apron member 3, so that the thickness of the apron member as in the prior art is increased or the rigidity is increased. The weight of the vehicle body and the cost are not increased as in the case of changing to the material, and it can contribute to weight reduction and cost reduction.

本実施例では、前記剛性断点部a,bを、ストラットタワー6の上面6dを跨いだエプロンメンバ3の上側及び下側に設けたので、強度,剛性の高いストラットタワー6の変形が容易となり、エプロンメンバ3の座屈変形及び倒れ込みをより確実に抑制することができる。   In this embodiment, the rigid break points a and b are provided on the upper and lower sides of the apron member 3 across the upper surface 6d of the strut tower 6, so that the strut tower 6 having high strength and rigidity can be easily deformed. The buckling deformation and the collapse of the apron member 3 can be more reliably suppressed.

特に小型車の場合には、車室の拡大を図る観点から、カウルパネル7をストラットタワー6の上方に張り出すように配置する場合がある。このトラットタワーの上壁部は、前輪を介して伝わる路面振動に対する剛性を確保するために板厚が大きいため、入力により座屈しにくい。一方、カウルパネルは、荷重伝達を効果的行うためにもできるだけ断面形状を潰したくない。   In particular, in the case of a small vehicle, the cowl panel 7 may be disposed so as to protrude above the strut tower 6 from the viewpoint of expanding the cabin. The upper wall portion of the trat tower is not easily buckled by input because the plate thickness is large in order to ensure rigidity against road surface vibration transmitted through the front wheels. On the other hand, the cowl panel does not want to crush the cross-sectional shape as much as possible in order to effectively transmit the load.

本実施例では、各剛性断点部a,bを板厚の大きい上壁部6aを上,下に跨ぐように配置したので、ストラットタワー6,特にストラット本体6bの折れ変形が容易となり、狭いエンジン室でのレイアウトであっても大きなエネルギー吸収効果を得ることができる。   In this embodiment, the rigid break points a and b are arranged so as to straddle the upper wall portion 6a having a large plate thickness upward and downward, so that the strut tower 6, in particular, the strut body 6b is easily bent and deformed, and is narrow. Even with the layout in the engine compartment, a large energy absorption effect can be obtained.

なお、前記実施例では、剛性断点部a,bを、エプロンメンバ3にビード11f及び突出部10fを形成することにより構成したが、本発明の構成断点部は、エプロンメンバの剛性を中途部で変化させることにあるから、例えば脆弱部等により形成することも可能である。   In the above-described embodiment, the rigidity break points a and b are formed by forming the bead 11f and the protrusion 10f on the apron member 3, but the structure break point according to the present invention has an intermediate effect on the rigidity of the apron member. For example, it may be formed by a weak part.

1 前部車体
2 サイドメンバ
3 エプロンメンバ
3a 後端部
4 フロントピラー
4′ 前端
5 結合部材
6 ストラットタワー
6d 上面
10b 外側壁(エプロンメンバの外側壁部)
10d 下フランジ部(エプロンメンバの内側壁部)
11c 内側壁(エプロンメンバの内側壁部)
a,b 剛性断点部
DESCRIPTION OF SYMBOLS 1 Front vehicle body 2 Side member 3 Apron member 3a Rear end part 4 Front pillar 4 'Front end 5 Connecting member 6 Strut tower 6d Upper surface 10b Outer side wall (outer wall part of apron member)
10d Lower flange (inner wall of apron member)
11c Inner wall (inner wall of apron member)
a, b Rigid break point

Claims (2)

車両前後方向に延びるサイドメンバと、
該サイドメンバの上方に車両前後方向に延びるよう配設され、車幅方向内側に位置する内側壁部と外側に位置する外側壁部とを有する略中空形状のエプロンメンバと、
該エプロンメンバの後端部に接続された車両上下方向に延びるフロントピラーと、
前記エプロンメンバと前記サイドメンバとに架け渡して接続された結合部材と、
前記エプロンメンバの内側壁部に接続されたストラットタワーとを備えた自動車の前部車体構造であって、
前記エプロンメンバの内側壁部には、車両前方からの入力により折れ変形を誘発する剛性断点部が設けられ、
該剛性断点部は、前記ストラットタワーの軸芯を通る中心線と前記フロントピラーの前端との間に位置するように配置されている
ことを特徴とする自動車の前部車体構造。
A side member extending in the longitudinal direction of the vehicle;
A substantially hollow apron member that is disposed to extend in the vehicle front-rear direction above the side member and has an inner wall portion located on the inner side in the vehicle width direction and an outer wall portion located on the outer side;
A front pillar connected to the rear end of the apron member and extending in the vehicle vertical direction;
A coupling member connected across the apron member and the side member;
A front body structure of an automobile comprising a strut tower connected to an inner wall portion of the apron member,
The inner side wall portion of the apron member is provided with a rigid break point portion that induces bending deformation by input from the front of the vehicle,
The front vehicle body structure of an automobile, wherein the rigid break point is disposed between a center line passing through the axis of the strut tower and a front end of the front pillar.
請求項1に記載の自動車の前部車体構造において、
前記剛性断点部は、前記エプロンメンバのストラットタワーの上面を跨いだ上側及び下側にそれぞれ設けられている
ことを特徴とする自動車の前部車体構造。
The front body structure of an automobile according to claim 1,
The front vehicle body structure according to claim 1, wherein the rigid break points are respectively provided on an upper side and a lower side across the upper surface of the strut tower of the apron member.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015003657A (en) * 2013-06-21 2015-01-08 スズキ株式会社 Peripheral part structure of cowl side member and strut tower
DE102016106720A1 (en) 2015-04-15 2016-10-20 Suzuki Motor Corporation Vehicle front structure
JP2020075629A (en) * 2018-11-08 2020-05-21 スズキ株式会社 Vehicle body front part structure

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JPS55136660A (en) * 1979-04-11 1980-10-24 Fuji Heavy Ind Ltd Frame structure
JPH0463775A (en) * 1990-06-30 1992-02-28 Mazda Motor Corp Front part body construction for automobile
JP2010023634A (en) * 2008-07-18 2010-02-04 Honda Motor Co Ltd Vehicle body front structure of automobile

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Publication number Priority date Publication date Assignee Title
JPS55136660A (en) * 1979-04-11 1980-10-24 Fuji Heavy Ind Ltd Frame structure
JPH0463775A (en) * 1990-06-30 1992-02-28 Mazda Motor Corp Front part body construction for automobile
JP2010023634A (en) * 2008-07-18 2010-02-04 Honda Motor Co Ltd Vehicle body front structure of automobile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015003657A (en) * 2013-06-21 2015-01-08 スズキ株式会社 Peripheral part structure of cowl side member and strut tower
DE102016106720A1 (en) 2015-04-15 2016-10-20 Suzuki Motor Corporation Vehicle front structure
JP2016203647A (en) * 2015-04-15 2016-12-08 スズキ株式会社 Front structure of vehicle
JP2020075629A (en) * 2018-11-08 2020-05-21 スズキ株式会社 Vehicle body front part structure
JP7180293B2 (en) 2018-11-08 2022-11-30 スズキ株式会社 Body front structure

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