JP2006076455A - Car body front structure - Google Patents

Car body front structure Download PDF

Info

Publication number
JP2006076455A
JP2006076455A JP2004262920A JP2004262920A JP2006076455A JP 2006076455 A JP2006076455 A JP 2006076455A JP 2004262920 A JP2004262920 A JP 2004262920A JP 2004262920 A JP2004262920 A JP 2004262920A JP 2006076455 A JP2006076455 A JP 2006076455A
Authority
JP
Japan
Prior art keywords
vehicle
vehicle body
rocker
radiator support
body front
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP2004262920A
Other languages
Japanese (ja)
Other versions
JP4297016B2 (en
Inventor
Yoshihiro Kawamoto
吉弘 河本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2004262920A priority Critical patent/JP4297016B2/en
Publication of JP2006076455A publication Critical patent/JP2006076455A/en
Application granted granted Critical
Publication of JP4297016B2 publication Critical patent/JP4297016B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Body Structure For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a car body front structure capable of preventing a front bumper from getting on the rocker of an opposing vehicle when the vehicle concerned has collided with the side of the opposing vehicle. <P>SOLUTION: Under a front side member 12, a second member 38 is installed inclining with a down-gradient. The tail of the second member 38 is fixed to a sub-frame 40, and the middle part in the longitudinal direction is coupled with a vertical column 36 of a radiator support 30 and a radiator support lower 34 in such a condition as pinched thereby from above and below. If the body front part 10 makes lateral collision to the opposing vehicle, the forefront of the second member 38 inclines downward and the middle part is held down from above by the vertical column 36, so that the member 38 undergoes an axial compressive deformation stably and also a moment in the direction that the forefront folds downward will act. Therefore, there is no risk of getting on the rocker 54 of the opposing vehicle. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、車体前部の両サイドに車両前後方向を長手方向として配置された左右一対のフロントサイドメンバを含んで構成された車体前部構造に関する。   The present invention relates to a vehicle body front structure that includes a pair of left and right front side members that are disposed on both sides of a vehicle body front portion with the vehicle longitudinal direction as a longitudinal direction.

従来から、コンパティビリティ対応の車体前部構造の開発が進められている。   Conventionally, the development of a front body structure for compatibility has been underway.

ここで、下記特許文献１には、フロントバンパ下方に補助バンパを設ける技術が開示されている。   Here, Patent Document 1 below discloses a technique of providing an auxiliary bumper below the front bumper.

簡単に説明すると、フロントバンパリインフォースは、その後方に配置されたフロントクロスメンバに左右一対のフロントバンパステーを介して結合されている。フロントバンパステーは前後に二分割された筒体の嵌合構造とされており、入力荷重の大きさに応じて段階的に軸圧縮変形してエネルギー吸収するようになっている。   Briefly, the front bumper reinforcement is coupled to a front cross member disposed behind the front bumper reinforcement via a pair of left and right front bumper stays. The front bumper stage has a cylindrical fitting structure that is divided into two parts, front and rear, and absorbs energy by axially compressing and deforming stepwise according to the magnitude of the input load.

上記フロントバンパリインフォースの下方側には、小断面の補助バンパリインフォースがフロントバンパリインフォースに沿って略平行に配設されている。補助バンパリインフォースの両サイドには車両前後方向を長手方向とする筒状の補助バンパステーが設けられており、当該補助バンパステーの後端部がフロントクロスメンバに結合されている。   On the lower side of the front bumper reinforcement, an auxiliary bumper reinforcement having a small cross section is disposed substantially parallel to the front bumper reinforcement. On both sides of the auxiliary bumper reinforcement, a cylindrical auxiliary bumper stay having a longitudinal direction in the vehicle front-rear direction is provided, and a rear end portion of the auxiliary bumper stay is coupled to the front cross member.

上記構成によれば、歩行者と接触した際にはフロントバンパステーの低強度部分が変形すると共に補助バンパリインフォースが歩行者の脚部下側をすくい上げる方向へのモーメントを作用させる。車両との軽衝突時のような場合には、フロントバンパステー及び補助バンパステーの双方が軸方向に圧壊される。
特開平１１‐７８７３２号公報（段落番号［００３５］〜段落番号［００３７］及び図１１〜図１５） 特開２００２‐１２０７５３号公報 According to the said structure, when it contacts with a pedestrian, the low intensity | strength part of a front bumper stage will deform | transform and the auxiliary bumper reinforcement will apply the moment to the direction which scoops up a leg part of a pedestrian. In the case of a light collision with the vehicle, both the front bumper stay and the auxiliary bumper stay are crushed in the axial direction.
Japanese Patent Laid-Open No. 11-78732 (paragraph number [0035] to paragraph number [0037] and FIGS. 11 to 15) JP 2002-120753 A

しかしながら、上記先行技術による場合、相手車両の側面に衝突した際に、補助バンパリインフォースの先端部が相手車両のロッカへ乗り上げる可能性がある。というのも、昨今では、種々のタイプの自動車が市販されており、車種ごとにロッカの車両上下方向位置が異なるためである。   However, in the case of the above prior art, there is a possibility that the front end portion of the auxiliary bumper reinforcement runs on the rocker of the opponent vehicle when it collides with the side surface of the opponent vehicle. This is because, in recent years, various types of automobiles are commercially available, and the position of the rocker in the vertical direction varies depending on the type of vehicle.

本発明は上記事実を考慮し、相手車両の側面に衝突した場合に相手車両のロッカにフロントバンパ部分が乗り上げるのを防止することができる車体前部構造を得ることが目的である。   In consideration of the above facts, the present invention has an object of obtaining a vehicle body front structure that can prevent a front bumper portion from riding on a rocker of an opponent vehicle when it collides with a side surface of the opponent vehicle.

請求項１記載の本発明に係る車体前部構造は、車体前部の両サイドに車両前後方向を長手方向として配置された左右一対のフロントサイドメンバを含んで構成された車体前部構造であって、前記フロントサイドメンバの下方側に、当該フロントサイドメンバに沿って配置されると共に後端側が車体構造部材に支持された前後方向部材を設け、さらに、当該前後方向部材は、側面視で前端側の方が後端側よりも下がるように傾斜した状態で配置されており、かつ中間部が車両上下方向に沿って配置された上下方向部材に結合されている、ことを特徴としている。   The vehicle body front structure according to the first aspect of the present invention is a vehicle body front structure that includes a pair of left and right front side members that are arranged on both sides of the vehicle front portion with the vehicle longitudinal direction as the longitudinal direction. A front-rear direction member disposed along the front side member and supported at the rear end side by the vehicle body structural member is provided below the front side member, and the front-rear direction member has a front end in side view. It is characterized by being arranged in an inclined state so that the side is lower than the rear end side, and the intermediate part is coupled to a vertical member arranged along the vehicle vertical direction.

請求項２記載の本発明に係る車体前部構造は、請求項１記載の発明において、前記上下方向部材の下端部は、前記前後方向部材の中間部を上方側から押さえ込むように配置されている、ことを特徴としている。   According to a second aspect of the present invention, in the vehicle body front portion structure according to the first aspect of the present invention, the lower end portion of the vertical member is disposed so as to press the intermediate portion of the front / rear direction member from above. It is characterized by that.

請求項３記載の本発明に係る車体前部構造は、請求項１又は請求項２記載の発明において、前記上下方向部材は、略枠状に形成されたラジエータサポートの側部を構成する柱状部材である、ことを特徴としている。   According to a third aspect of the present invention, in the vehicle body front portion structure according to the first or second aspect, the vertical member is a columnar member that forms a side portion of a radiator support that is formed in a substantially frame shape. It is characterized by that.

請求項４記載の本発明に係る車体前部構造は、請求項３記載の発明において、前記柱状部材の下端部と前記前後方向部材の上面とは、両者の間に所定の隙間を設けた状態で結合されている、ことを特徴としている。   According to a fourth aspect of the present invention, in the vehicle body front portion structure according to the third aspect, the lower end of the columnar member and the upper surface of the front-rear direction member are provided with a predetermined gap therebetween. It is characterized by being connected by.

請求項１記載の本発明によれば、相手車両に側面衝突した場合、相互の車種によっては、フロントサイドメンバの下方側に配置された前後方向部材の前端部が、相手車両のロッカに当接することがある。この場合、相手車両のロッカと前後方向部材の前端部とが上下にずれることなく当接したのであれば、前後方向部材は車体構造部材に反力をとって軸圧縮変形し衝突時のエネルギーを吸収する。   According to the first aspect of the present invention, when a side collision occurs with the opponent vehicle, the front end portion of the front-rear direction member disposed on the lower side of the front side member abuts against the rocker of the opponent vehicle depending on the mutual vehicle type. Sometimes. In this case, if the rocker of the opponent vehicle and the front end portion of the front-rear direction member are in contact with each other without being vertically displaced, the front-rear direction member takes a reaction force on the vehicle body structural member and undergoes axial compression deformation, thereby reducing the energy at the time of collision. Absorb.

ここで、本発明では、前後方向部材を側面視で前端側の方が後端側よりも下がるように傾斜した状態で配置したので、仮に相手車両のロッカと前後方向部材の前端部とが上下方向に多少ずれたとしても、前後方向部材が相手車両のロッカへ乗り上がるのを抑制することができる。つまり、前後方向部材の前端部が下方にずれて相手車両のロッカに当接した場合には、前後方向部材には車両下方側への回転モーメントが作用するので、相手車両のロッカへ乗り上げるおそれはない。また、前後方向部材の前端部が上方にずれて相手車両のロッカに当接したとしても、前後方向部材は元々下向きに傾斜して配置されているため、ロッカ乗り上げに対する抵抗が強くなる。従って、前後方向部材が相手車両のロッカに乗り上がる可能性が低くなる。   Here, in the present invention, the front-rear direction member is disposed in an inclined state such that the front end side is lower than the rear end side in a side view, so that the rocker of the counterpart vehicle and the front end portion of the front-rear direction member are vertically Even if the direction is slightly deviated, the front-rear direction member can be prevented from riding on the rocker of the opponent vehicle. In other words, when the front end of the front / rear direction member is displaced downward and comes into contact with the rocker of the opponent vehicle, a rotational moment acts on the front / rear direction member on the lower side of the vehicle. Absent. Further, even if the front end portion of the front / rear direction member is displaced upward and comes into contact with the rocker of the opponent vehicle, the front / rear direction member is originally arranged to be inclined downward, so that the resistance to the rocker ride is increased. Therefore, the possibility that the longitudinal member rides on the rocker of the opponent vehicle is reduced.

また、本発明では、前後方向部材の中間部を車両上下方向に沿って配置された上下方向部材に結合させたので、前後方向部材は後端側と中間部の少なくとも二箇所で車体側に結合及び支持されることになる。このため、前後方向部材に作用するロッカ乗り上げ方向への回転モーメントのモーメントアーム長を短くすることができる。従って、前後方向部材に作用するロッカ乗り上げ方向への回転モーメントを抑制することができる。換言すれば、前後方向部材の後端側と車体構造部材との結合点に過大なロッカ乗り上げ方向への回転モーメントが作用するのを回避することができる。さらに、前後方向部材の中間部が上下方向部材と結合されることによって、前後方向部材の前端部が相手車両のロッカに当接した際に、前後方向部材の前端部に先端下折れ方向の回転モーメント成分を発生させることができる。上記より、本発明によれば、前後方向部材が相手車両のロッカへ乗り上がるのをより一層抑制することができる。   In the present invention, since the middle part of the longitudinal member is coupled to the vertical member arranged along the vehicle vertical direction, the longitudinal member is coupled to the vehicle body side at at least two locations of the rear end side and the intermediate part. And will be supported. For this reason, the moment arm length of the rotational moment acting on the rocker riding direction acting on the longitudinal member can be shortened. Therefore, the rotational moment in the rocker riding direction that acts on the longitudinal member can be suppressed. In other words, it is possible to avoid an excessive rotational moment in the rocker ride-up direction from acting on the coupling point between the rear end side of the front-rear direction member and the vehicle body structural member. Further, the middle part of the front / rear direction member is coupled with the vertical direction member, so that when the front end part of the front / rear direction member abuts against the rocker of the opponent vehicle, the front end part of the front / rear direction member rotates in the downward direction at the tip A moment component can be generated. As mentioned above, according to this invention, it can suppress further that a front-back direction member gets on the rocker of an other party vehicle.

請求項２記載の本発明によれば、上下方向部材の下端部が前後方向部材の中間部を上方側から押さえ込むように配置されているため、前後方向部材が相手車両のロッカへ乗り上がる方向へ変形するのを抑えることができる。   According to the second aspect of the present invention, since the lower end portion of the vertical member is disposed so as to press the intermediate portion of the front / rear direction member from above, the front / rear direction member rides on the rocker of the opponent vehicle. Deformation can be suppressed.

請求項３記載の本発明によれば、略枠状に形成されたラジエータサポートの側部を構成する柱状部材によって上下方向部材を構成したので、既存の部材を活用することができる。   According to the third aspect of the present invention, since the vertical member is constituted by the columnar member constituting the side portion of the radiator support formed in a substantially frame shape, the existing member can be utilized.

請求項４記載の本発明によれば、ラジエータサポートの柱状部材の下端部と前後方向部材の上面との間に所定の隙間を設けた状態で結合する構造としたので、側面衝突時の衝突荷重によって前後方向部材が軸圧縮変形等しても、隙間があることによって、ラジエータサポートの柱状部材が損傷を受けずに済むか、或いは損傷を受けたとしても極めて軽度の損傷程度で済む。   According to the fourth aspect of the present invention, since the structure is such that a predetermined gap is provided between the lower end of the columnar member of the radiator support and the upper surface of the front-rear member, the collision load at the time of a side collision Therefore, even if the front-rear direction member is axially deformed by deformation or the like, the columnar member of the radiator support can be prevented from being damaged due to the gap, or even if it is damaged, only a slight damage is required.

以上説明したように、請求項１記載の車体前部構造は、フロントサイドメンバの下方側に、当該フロントサイドメンバに沿って配置されると共に後端側が車体構造部材に支持された前後方向部材を設け、さらに、当該前後方向部材を側面視で前端側の方が後端側よりも下がるように傾斜した状態で配置し、かつ中間部を車両上下方向に沿って配置された上下方向部材に結合させたので、相手車両の側面に衝突した場合に相手車両のロッカにフロントバンパ部分が乗り上げるのを防止することができるという優れた効果を有する。   As described above, the vehicle body front portion structure according to claim 1 includes the front-rear direction member disposed along the front side member on the lower side of the front side member and supported at the rear end side by the vehicle body structural member. Further, the front-rear direction member is arranged in an inclined state so that the front end side is lower than the rear end side in a side view, and the middle part is coupled to the vertical direction member arranged along the vehicle vertical direction. Therefore, when the vehicle collides with the side surface of the opponent vehicle, the front bumper portion can be prevented from getting on the rocker of the opponent vehicle.

請求項２記載の本発明に係る車体前部構造は、請求項１記載の発明において、上下方向部材の下端部が前後方向部材の中間部を上方側から押さえ込むように配置されているため、前後方向部材が相手車両のロッカへ乗り上がる方向へ変形するのを抑えることができ、その結果、相手車両のロッカへの乗り上げ防止効果に対する信頼性を向上させることができるという優れた効果を有する。   The vehicle body front part structure according to the present invention as defined in claim 2 is the front and rear structure according to the present invention as defined in claim 1, since the lower end portion of the vertical member is disposed so as to press the intermediate portion of the front and rear member from above. It is possible to suppress the direction member from being deformed in the direction of climbing on the rocker of the opponent vehicle, and as a result, there is an excellent effect that the reliability of the effect of preventing the opponent vehicle from climbing on the rocker can be improved.

請求項３記載の本発明に係る車体前部構造は、請求項１又は請求項２記載の発明において、略枠状に形成されたラジエータサポートの側部を構成する柱状部材によって上下方向部材を構成したので、既存の部材を活用することができ、その結果、部品点数の増加を招かず、コスト削減に資することができるという優れた効果を有する。   According to a third aspect of the present invention, in the vehicle body front portion structure according to the first or second aspect of the present invention, a vertical member is constituted by a columnar member constituting a side portion of a radiator support formed in a substantially frame shape. As a result, existing members can be used, and as a result, the number of parts is not increased and the cost can be reduced.

請求項４記載の本発明に係る車体前部構造は、請求項３記載の発明において、柱状部材の下端部と前後方向部材の上面とを、両者の間に所定の隙間を設けた状態で結合したので、前後方向部材を安定した状態で軸圧縮変形させることができると共に、前後方向部材が軸圧縮変形してもラジエータサポートを効果的に保護することができるという優れた効果を有する。   According to a fourth aspect of the present invention, there is provided a vehicle body front part structure according to the third aspect of the invention, wherein the lower end of the columnar member and the upper surface of the front-rear member are joined together with a predetermined gap therebetween. Therefore, the longitudinal member can be compressed and deformed in a stable state, and the radiator support can be effectively protected even if the longitudinal member is axially deformed.

以下、図１及び図２を用いて、本発明に係る車体前部構造の一実施形態について説明する。   Hereinafter, an embodiment of a vehicle body front structure according to the present invention will be described with reference to FIGS. 1 and 2.

図１には、本実施形態に係る車体前部構造の側面図が示されている。この図に示されるように、車体前部１０の両サイドには、車両前後方向を長手方向として左右一対のフロントサイドメンバ１２が配設されている。フロントサイドメンバ１２は、車両前後方向に沿って直線状に延びる本体部１２Ａと、この本体部１２Ａの後端部から斜め下方へ屈曲するように設定されたキックアップ部１２Ｂと、このキックアップ部１２Ｂの下端部から図示しない車体フロアの下面側へ延出される後部１２Ｃと、によって構成されている。なお、フロントサイドメンバ１２は、アウタパネルとインナパネルとを結合させることにより略筒状（閉断面構造）に形成されている。   FIG. 1 shows a side view of a vehicle body front structure according to the present embodiment. As shown in this figure, a pair of left and right front side members 12 is disposed on both sides of the vehicle body front portion 10 with the longitudinal direction of the vehicle being the longitudinal direction. The front side member 12 includes a main body portion 12A that extends linearly along the vehicle front-rear direction, a kick-up portion 12B that is set to bend obliquely downward from a rear end portion of the main body portion 12A, and the kick-up portion. The rear portion 12C extends from the lower end portion of 12B to the lower surface side of the vehicle body floor (not shown). The front side member 12 is formed in a substantially cylindrical shape (closed cross-sectional structure) by connecting the outer panel and the inner panel.

キックアップ部１２Ｂの後端部は、フロントサイドメンバアウタリインフォース１４を介してダッシュクロスメンバ１６及び図示しないフロントピラー（Ａピラー）の双方に結合されている。このフロントサイドメンバアウタリインフォース１４が存在することによって、衝突時にフロントサイドメンバ１２がキックアップ部１２Ｂで屈曲するのが抑制されると共に、衝突荷重がフロントサイドメンバアウタリインフォース１４からフロントピラーの上下へ分散されるようになっている。   The rear end portion of the kick-up portion 12B is coupled to both the dash cross member 16 and a front pillar (A pillar) (not shown) via the front side member outer reinforcement 14. The presence of the front side member outer reinforcement 14 prevents the front side member 12 from bending at the kick-up portion 12B at the time of a collision, and the collision load is distributed from the front side member outer reinforcement 14 to the top and bottom of the front pillar. It has come to be.

また、上記左右一対のフロントサイドメンバ１２の前端部には、所定値以上の衝突荷重が入力されることにより軸圧縮塑性変形する略筒体形状のクラッシュボックス１８が取り付けられている。さらに、左右のクラッシュボックス１８の前端部同士は、車両幅方向を長手方向として配置された長尺状のフロントバンパリインフォース２０によって相互に連結されている。これにより、衝突時にフロントバンパ２２に入力された荷重が、左右のクラッシュボックス１８及びフロントサイドメンバ１２に効率良く伝達されるようになっている。   A substantially cylindrical crash box 18 that is axially compressed and plastically deformed when a collision load of a predetermined value or more is input is attached to the front ends of the pair of left and right front side members 12. Further, the front end portions of the left and right crash boxes 18 are connected to each other by a long front bumper reinforcement 20 arranged with the vehicle width direction as a longitudinal direction. Thereby, the load input to the front bumper 22 at the time of a collision is efficiently transmitted to the left and right crash boxes 18 and the front side member 12.

なお、フロントバンパリインフォース２０はフロントバンパ２２の一部を構成する強度部材であり、その前方側には図示しないアブソーバ及びフロントバンパカバー２４が配設されている。   The front bumper reinforcement 20 is a strength member that constitutes a part of the front bumper 22, and an absorber and a front bumper cover 24 (not shown) are disposed on the front side thereof.

また、フロントサイドメンバ１２の上方側には、車体側部の上縁部を構成するエプロンアッパメンバ２６が配設されている。エプロンアッパメンバ２６は下向きに開放された略コ字状断面を成しており、車両前後方向を長手方向として配設されている。エプロンアッパメンバ２６とフロントサイドメンバ１２との間の側面部には、両者を上下方向に繋ぐフロントフェンダエプロン２８が配設されている。   Further, an apron upper member 26 that constitutes an upper edge portion of the vehicle body side portion is disposed above the front side member 12. The apron upper member 26 has a substantially U-shaped cross section opened downward, and is disposed with the longitudinal direction of the vehicle as the longitudinal direction. A front fender apron 28 that connects the apron upper member 26 and the front side member 12 in the vertical direction is disposed on the side surface portion.

また、車体前部１０の前端部には、図示しないラジエータを車体に支持するラジエータサポート３０が配設されている。ラジエータサポート３０は正面視で略矩形枠状に構成されており、ラジエータサポートアッパ３２、ラジエータサポートロア３４、上下方向部材としての左右一対の縦柱３６によって構成されている。   A radiator support 30 for supporting a radiator (not shown) on the vehicle body is disposed at the front end of the vehicle body front portion 10. The radiator support 30 is configured in a substantially rectangular frame shape when viewed from the front, and includes a radiator support upper 32, a radiator support lower 34, and a pair of left and right vertical columns 36 serving as vertical members.

ここで、上述した左右一対のフロントサイドメンバ１２の下方側には、略車両前後方向を長手方向とする前後方向部材としての長尺状の第２メンバ３８がそれぞれ配設されている。第２メンバ３８は、軸方向に見て「田」の字状に形成されており、アルミニウム合金材料を押出し成形することにより製作されている。   Here, on the lower side of the pair of left and right front side members 12 described above, a long second member 38 as a longitudinal member whose longitudinal direction is substantially the longitudinal direction of the vehicle is disposed. The second member 38 is formed in the shape of a “field” when viewed in the axial direction, and is manufactured by extruding an aluminum alloy material.

第２メンバ３８の後端部は、車体下部に配置された車体構造部材としてのサブフレーム（フロントサスペンションメンバ）４０の前端部にボルト４２及びウエルドナットで締結（結合）されている。第２メンバ３８の前端部同士は、フロントバンパリインフォース２０に沿って略平行に配置された断面「日」の字状のバンパリインフォース４４によって相互に連結されている。従って、上下二段にフロントバンパリインフォース２０とバンパリインフォース４４とが配置された構造になっている。   The rear end portion of the second member 38 is fastened (coupled) with a bolt 42 and a weld nut to a front end portion of a subframe (front suspension member) 40 as a vehicle body structural member disposed at the lower portion of the vehicle body. The front end portions of the second member 38 are connected to each other by a bumper reinforcement 44 having a cross-sectional “day” shape disposed substantially parallel to the front bumper reinforcement 20. Therefore, the front bumper reinforcement 20 and the bumper reinforcement 44 are arranged in two upper and lower stages.

上記第２メンバ３８は、ラジエータサポート３０の縦柱３６の下端部と結合されている。具体的には、第２メンバ３８の長手方向の中間部には、車両上下方向を軸方向としかつ軸長が第２メンバ３８の高さより若干長いカラー４６が貫通状態で配置（溶接により固定）されている。そして、組付けに際しては、カラー４６の上端面をラジエータサポート３０の縦柱３６の底面に当接させると共に、カラー４６の下端面をラジエータサポートロア３４の上面に当接させる。なお、ラジエータサポート３０の縦柱３６の水平断面形状は平面視でＬ字状とされており、当該縦柱３６の下端部の上面には図示しないウエルドナットが予め溶着されている。そして、ラジエータサポートロア３４の下側からボルト４８をカラー４６内へ挿入してウエルドナットに螺合させることにより、第２メンバ３８の長手方向中間部がラジエータサポート３０の縦柱３６の下端部とラジエータサポートロア３４との間に上下に挟まれた状態で結合されている。   The second member 38 is coupled to the lower end portion of the vertical column 36 of the radiator support 30. Specifically, a collar 46 having an axial direction in the vertical direction of the vehicle and a slightly longer axial length than the height of the second member 38 is disposed in the middle portion in the longitudinal direction of the second member 38 (fixed by welding). Has been. When assembling, the upper end surface of the collar 46 is brought into contact with the bottom surface of the vertical column 36 of the radiator support 30 and the lower end surface of the collar 46 is brought into contact with the upper surface of the radiator support lower 34. The horizontal cross-sectional shape of the vertical column 36 of the radiator support 30 is L-shaped in plan view, and a weld nut (not shown) is welded in advance to the upper surface of the lower end portion of the vertical column 36. Then, the bolt 48 is inserted into the collar 46 from the lower side of the radiator support lower 34 and screwed into the weld nut, whereby the longitudinal middle portion of the second member 38 is connected to the lower end portion of the vertical column 36 of the radiator support 30. It is coupled with the radiator support lower 34 while being sandwiched between the upper and lower sides.

組付後の状態では、ラジエータサポート３０の縦柱３６が第２メンバ３８の長手方向の中間部を上方側から押さえ込むように配置されている。また、カラー４６の軸方向の両端部が第２メンバ３８の上下の締結面から若干突出しているので、第２メンバ３８の上面とラジエータサポート３０の縦柱３６の下端部との間及び第２メンバ３８の下面とラジエータサポートロア３４との間にそれぞれ所定の（僅かな）隙間５０、５２が設定されている。これらの隙間５０、５２は、第２メンバ３８が軸圧縮変形した際にラジエータサポート３０との干渉を避ける役割を果たしている。   In the state after assembly, the vertical column 36 of the radiator support 30 is disposed so as to press the intermediate portion in the longitudinal direction of the second member 38 from above. In addition, since both end portions of the collar 46 in the axial direction slightly protrude from the upper and lower fastening surfaces of the second member 38, the collar 46 is disposed between the upper surface of the second member 38 and the lower end portion of the vertical column 36 of the radiator support 30. Predetermined (slight) gaps 50 and 52 are respectively set between the lower surface of the member 38 and the radiator support lower 34. These gaps 50 and 52 serve to avoid interference with the radiator support 30 when the second member 38 undergoes axial compression deformation.

上述した第２メンバ３８は、側面視で前端側の方が後端側よりも下がるように傾斜した状態で（車両前方側へ向かうにつれて下り勾配となるように）配置されている。   The second member 38 described above is arranged in a state of being inclined such that the front end side is lower than the rear end side in a side view (so that the second member 38 is inclined downward toward the vehicle front side).

（本実施形態の作用・効果）
次に、本実施形態の作用並びに効果について説明する。 (Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

図２（Ａ）に示される状態が衝突前の状態である。この状態では、相手車両のロッカ５４が、第２メンバ３８の前端部に配置されたバンパリインフォース４４と対向（ほぼ正対）している。   The state shown in FIG. 2A is the state before the collision. In this state, the rocker 54 of the opponent vehicle faces (substantially directly faces) the bumper reinforcement 44 disposed at the front end of the second member 38.

この状態から車体前部１０が相手車両の側面に衝突すると、相手車両のロッカ５４にバンパリインフォース４４が当接し、バンパリインフォース４４を介して第２メンバ３８へ衝突荷重が入力される。これにより、第２メンバ３８はサブフレーム４０に反力をとって軸圧縮変形していき、これにより衝突時のエネルギーが吸収される。なお、フロントサイドメンバ１２側においても、フロントバンパリインフォース２０から衝突荷重が入力されると、クラッシュボックス１８が軸圧縮変形して所定のエネルギー吸収を行う。   When the vehicle body front part 10 collides with the side surface of the opponent vehicle from this state, the bumper reinforcement 44 comes into contact with the rocker 54 of the opponent vehicle, and a collision load is input to the second member 38 via the bumper reinforcement 44. As a result, the second member 38 is subjected to axial compression deformation by applying a reaction force to the subframe 40, thereby absorbing energy at the time of collision. In the front side member 12 side as well, when a collision load is input from the front bumper reinforcement 20, the crash box 18 undergoes axial compression deformation and absorbs predetermined energy.

ここで、本実施形態に係る車体前部構造では、第２メンバ３８を側面視で前端側の方が後端側よりも下がるように傾斜した状態で配置したので、仮に相手車両のロッカ５４と第２メンバ３８の前端部とが上下方向に多少ずれたとしても、第２メンバ３８が相手車両のロッカ５４へ乗り上がるのを抑制することができる。つまり、第２メンバ３８の前端部が下方にずれて相手車両のロッカ５４に当接した場合には、第２メンバ３８には車両下方側への回転モーメントが作用するので、相手車両のロッカ５４へ乗り上げるおそれはない。また、第２メンバ３８の前端部が上方にずれて相手車両のロッカ５４に当接したとしても、第２メンバ３８は元々下向きに傾斜して配置されているため、ロッカ乗り上げに対する抵抗が強くなる。従って、第２メンバ３８が相手車両のロッカ５４に乗り上がる可能性が低くなる。   Here, in the vehicle body front part structure according to the present embodiment, the second member 38 is arranged in an inclined state so that the front end side is lower than the rear end side in a side view. Even if the front end portion of the second member 38 is slightly displaced in the vertical direction, the second member 38 can be prevented from climbing onto the rocker 54 of the opponent vehicle. In other words, when the front end portion of the second member 38 is displaced downward and comes into contact with the rocker 54 of the opponent vehicle, a rotational moment acts on the second member 38 on the lower side of the vehicle. There is no risk of getting on. Further, even if the front end portion of the second member 38 is displaced upward and comes into contact with the rocker 54 of the opponent vehicle, the second member 38 is originally arranged to be inclined downward, so that resistance to riding on the rocker is increased. . Therefore, the possibility that the second member 38 gets on the rocker 54 of the opponent vehicle is reduced.

また、本実施形態に係る車体前部構造では、第２メンバ３８の長手方向の中間部にラジエータサポート３０の縦柱３６の下端部を上方側から押さえ込むように結合させているので、第２メンバ３８は後端側と中間部の少なくとも二箇所で車体側に結合及び支持されることになる。このため、第２メンバ３８に作用するロッカ乗り上げ方向への回転モーメントのモーメントアーム長を短く（図２（Ａ）のＬ１からＬ２に短縮）することができる。従って、第２メンバ３８に作用するロッカ乗り上げ方向への回転モーメントを抑制することができる。換言すれば、第２メンバ３８の後端側とサブフレーム４０との結合点（Ｐ線矢視部）に、モーメントアーム長がＬ１のロッカ乗り上げ方向への過大な回転モーメントが作用するのを回避することができる。さらに、第２メンバ３８の長手方向の中間部がラジエータサポート３０の縦柱３６の下端部と結合されることによって、第２メンバ３８の前端部が相手車両のロッカ５４に当接した際に、第２メンバ３８の前端部に先端下折れ方向の回転モーメント成分（図２（Ｂ）の回転モーメントＭ）を発生させることができる。上記より、本実施形態によれば、第２メンバ３８が相手車両のロッカ５４へ乗り上がるのをより一層抑制することができる。   Further, in the vehicle body front structure according to the present embodiment, the lower end of the vertical column 36 of the radiator support 30 is joined to the middle part in the longitudinal direction of the second member 38 so as to be pressed from above, so the second member 38 is coupled and supported on the vehicle body side in at least two locations, the rear end side and the intermediate portion. For this reason, the moment arm length of the rotational moment acting on the second member 38 in the rocker riding direction can be shortened (shortened from L1 to L2 in FIG. 2A). Therefore, the rotational moment in the rocker riding direction that acts on the second member 38 can be suppressed. In other words, an excessive rotational moment in the rocker riding direction with the moment arm length L1 is prevented from acting on the coupling point (part indicated by arrow P) between the rear end side of the second member 38 and the subframe 40. can do. Furthermore, when the middle part in the longitudinal direction of the second member 38 is coupled to the lower end part of the vertical column 36 of the radiator support 30, when the front end part of the second member 38 comes into contact with the rocker 54 of the opponent vehicle, A rotational moment component (rotational moment M in FIG. 2 (B)) in the forward bending direction can be generated at the front end portion of the second member 38. As described above, according to the present embodiment, it is possible to further suppress the second member 38 from climbing onto the rocker 54 of the opponent vehicle.

以上より、本実施形態に係る車体前部構造によれば、相手車両の側面に衝突した場合に相手車両のロッカ５４にフロントバンパ部分（バンパリインフォース４４）が乗り上げるのを防止することができる。   As described above, according to the vehicle body front structure according to the present embodiment, it is possible to prevent the front bumper portion (bumper reinforcement 44) from riding on the rocker 54 of the opponent vehicle when the vehicle collides with the side surface of the opponent vehicle.

なお、図２（Ｂ）では第２メンバ３８の先端部を車両下方側へ下折れした状態で描いているが、ロッカ５４の中心にバンパリインフォース４４が当接し、第２メンバ３８の軸芯に衝突荷重が入力された場合には、第２メンバ３８の先端部が下折れせずに軸圧縮変形のみするという態様も当然ある。   In FIG. 2B, the tip of the second member 38 is drawn in a state of being folded downward on the vehicle. However, the bumper reinforcement 44 abuts on the center of the rocker 54, and the axis of the second member 38 is Of course, when a collision load is input, there is also a mode in which the distal end portion of the second member 38 does not bend down and only undergoes axial compression deformation.

また、本実施形態に係る車体前部構造では、ラジエータサポート３０の縦柱３６の下端部が第２メンバ３８の長手方向の中間部を上方側から（図２（Ｂ）の矢印Ｖ方向へ）押さえ込むように配置されているため、第２メンバ３８が相手車両のロッカ５４へ乗り上がる方向へ変形するのを抑制することができる。その結果、本実施形態によれば、第２メンバ３８の相手車両のロッカ５４への乗り上げ防止効果に対する信頼性を向上させることができる。   Moreover, in the vehicle body front part structure according to the present embodiment, the lower end portion of the vertical column 36 of the radiator support 30 is located above the intermediate portion in the longitudinal direction of the second member 38 (in the direction of arrow V in FIG. 2B). Since it arrange | positions so that it may hold down, it can suppress that the 2nd member 38 deform | transforms in the direction which rides on the rocker 54 of an other vehicle. As a result, according to the present embodiment, it is possible to improve the reliability with respect to the effect of preventing the second member 38 from riding on the rocker 54 of the opponent vehicle.

さらに、前記の如く、ラジエータサポート３０の縦柱３６とラジエータサポートロア３４とによって第２メンバ３８の長手方向の中間部を上下から挟み込むように結合することにより、第２メンバ３８の軸圧縮変形を安定化させる効果も得られる。   Further, as described above, the longitudinal support 36 of the radiator support 30 and the radiator support lower 34 are coupled so as to sandwich the longitudinal intermediate portion of the second member 38 from above and below, thereby reducing the axial compression deformation of the second member 38. A stabilizing effect is also obtained.

加えて、本実施形態に係る車体前部構造では、第２メンバ３８とラジエータサポート３０との締結面との間に所定の隙間５０、５２を設定したので、相手車両の側面に衝突した際の衝突荷重によって第２メンバ３８が軸圧縮変形等しても、隙間５０、５２があることによって、ラジエータサポート３０の縦柱３６やラジエータサポートロア３４が損傷を受けずに済むか、或いは損傷を受けたとしても極めて軽度の損傷程度で済む。その結果、本実施形態によれば、第２メンバ３８を安定した状態で軸圧縮変形させることができると共に、第２メンバ３８が軸圧縮変形してもラジエータサポート３０を効果的に保護することができる。   In addition, in the vehicle body front part structure according to the present embodiment, the predetermined gaps 50 and 52 are set between the fastening surfaces of the second member 38 and the radiator support 30, so that when the vehicle collides with the side surface of the opponent vehicle Even if the second member 38 is subjected to axial compression deformation or the like due to a collision load, the vertical columns 36 and the radiator support lower 34 of the radiator support 30 are not damaged or damaged due to the clearances 50 and 52. Even very little damage is required. As a result, according to the present embodiment, the second member 38 can be axially compressed and deformed in a stable state, and the radiator support 30 can be effectively protected even if the second member 38 is axially deformed. it can.

さらに、本実施形態に係る車体前部構造では、略枠状に形成されたラジエータサポート３０の縦柱３６によって上下方向部材を構成したので、既存の部材を活用することができる。その結果、本実施形態によれば、部品点数の増加を招かず、コスト削減に資することができる。   Furthermore, in the vehicle body front part structure according to the present embodiment, since the vertical member is constituted by the vertical column 36 of the radiator support 30 formed in a substantially frame shape, an existing member can be used. As a result, according to the present embodiment, it is possible to contribute to cost reduction without increasing the number of parts.

（実施形態の補足説明）
なお、上述した本実施形態では、上下方向部材としてラジエータサポート３０の縦柱３６を利用したが、これに限らず、ラジエータサポートとは無関係な専用部材を設定する構成を採ってもよい。 (Supplementary explanation of the embodiment)
In the above-described embodiment, the vertical column 36 of the radiator support 30 is used as the vertical member. However, the present invention is not limited to this, and a configuration may be adopted in which a dedicated member unrelated to the radiator support is set.

また、上述した本実施形態では、第２メンバ３８の長手方向の中間部をラジエータサポート３０の縦柱３６とラジエータサポートロア３４とで上下から挟むように結合させたが、これに限らず、少なくとも上下方向部材の下端部が第２メンバ３８の長手方向の中間部に上方側から結合される構成であればよい。   Further, in the present embodiment described above, the intermediate portion in the longitudinal direction of the second member 38 is coupled so as to be sandwiched from above and below by the vertical column 36 of the radiator support 30 and the radiator support lower 34. What is necessary is just the structure by which the lower end part of an up-down direction member is couple | bonded with the intermediate part of the longitudinal direction of the 2nd member 38 from upper side.

さらに、上述した本実施形態では、第２メンバ３８を円滑に軸圧縮変形させかつラジエータサポート３０への悪影響を排除するという観点から、第２メンバ３８の長手方向の中間部とラジエータサポート３０側の上下締結面との間にそれぞれ隙間５０、５２を設定したが、請求項１乃至請求項３記載の本発明には、かかる隙間が設定されていない構成も含まれる。   Further, in the present embodiment described above, from the viewpoint of smoothly axially compressing and deforming the second member 38 and eliminating an adverse effect on the radiator support 30, the longitudinal intermediate portion of the second member 38 and the radiator support 30 side are provided. The gaps 50 and 52 are set between the upper and lower fastening surfaces, respectively, but the invention according to claims 1 to 3 includes a configuration in which such a gap is not set.

本実施形態に係る車体前部構造の全体構成を示す側面図である。It is a side view which shows the whole structure of the vehicle body front part structure which concerns on this embodiment. （Ａ）は衝突前の状態を示す図１に対応する車体前部構造の側面図であり、（Ｂ）は衝突後の状態を示す車体前部構造の側面図である。(A) is a side view of the vehicle body front part structure corresponding to FIG. 1 which shows the state before a collision, (B) is a side view of the vehicle body front part structure which shows the state after a collision.

符号の説明Explanation of symbols

１０ 車体前部
１２ フロントサイドメンバ
３０ ラジエータサポート
３６ 縦柱（上下方向部材、柱状部材）
３８ 第２メンバ（前後方向部材）
４０ サブフレーム（車体構造部材）
５０ 隙間
５２ 隙間 DESCRIPTION OF SYMBOLS 10 Car body front part 12 Front side member 30 Radiator support 36 Vertical column (vertical member, columnar member)
38 Second member (front-rear direction member)
40 Subframe (body structure member)
50 gap 52 gap

Claims (4)

車体前部の両サイドに車両前後方向を長手方向として配置された左右一対のフロントサイドメンバを含んで構成された車体前部構造であって、
前記フロントサイドメンバの下方側に、当該フロントサイドメンバに沿って配置されると共に後端側が車体構造部材に支持された前後方向部材を設け、
さらに、当該前後方向部材は、側面視で前端側の方が後端側よりも下がるように傾斜した状態で配置されており、かつ中間部が車両上下方向に沿って配置された上下方向部材に結合されている、
ことを特徴とする車体前部構造。 A vehicle body front part structure configured to include a pair of left and right front side members disposed on both sides of the vehicle body front portion with the vehicle front-rear direction as a longitudinal direction,
On the lower side of the front side member, a front-rear direction member that is disposed along the front side member and whose rear end side is supported by the vehicle body structural member is provided.
Furthermore, the front-rear direction member is arranged in a state in which the front end side is inclined so that the front end side is lower than the rear end side in a side view, and the intermediate portion is arranged in the vehicle up-down direction. Combined,
A vehicle body front structure characterized by that. 前記上下方向部材の下端部は、前記前後方向部材の中間部を上方側から押さえ込むように配置されている、
ことを特徴とする請求項１記載の車体前部構造。 The lower end portion of the vertical member is disposed so as to press the intermediate portion of the front-rear member from above.
The vehicle body front part structure according to claim 1. 前記上下方向部材は、略枠状に形成されたラジエータサポートの側部を構成する柱状部材である、
ことを特徴とする請求項１又は請求項２記載の車体前部構造。 The vertical member is a columnar member constituting a side portion of a radiator support formed in a substantially frame shape.
The vehicle body front part structure according to claim 1 or 2, wherein 前記柱状部材の下端部と前記前後方向部材の上面とは、両者の間に所定の隙間を設けた状態で結合されている、
ことを特徴とする請求項３記載の車体前部構造。 The lower end portion of the columnar member and the upper surface of the front-rear direction member are joined in a state where a predetermined gap is provided therebetween.
The vehicle body front part structure according to claim 3.
JP2004262920A 2004-09-09 2004-09-09 Body front structure Expired - Fee Related JP4297016B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004262920A JP4297016B2 (en) 2004-09-09 2004-09-09 Body front structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004262920A JP4297016B2 (en) 2004-09-09 2004-09-09 Body front structure

Publications (2)

Publication Number Publication Date
JP2006076455A true JP2006076455A (en) 2006-03-23
JP4297016B2 JP4297016B2 (en) 2009-07-15

Family

ID=36156275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004262920A Expired - Fee Related JP4297016B2 (en) 2004-09-09 2004-09-09 Body front structure

Country Status (1)

Country Link
JP (1) JP4297016B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009040187A (en) * 2007-08-08 2009-02-26 Aisin Seiki Co Ltd Vehicular bumper device
JP2009248818A (en) * 2008-04-08 2009-10-29 Honda Motor Co Ltd Vehicular body front structure
US8789874B2 (en) 2011-03-30 2014-07-29 Fuji Jukogyo Kabushiki Kaisha Front vehicle body structure
JP2016055755A (en) * 2014-09-09 2016-04-21 トヨタ自動車株式会社 Vehicle front part structure
JP2018058532A (en) * 2016-10-07 2018-04-12 トヨタ自動車東日本株式会社 Impact absorption structure of vehicle front part

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013206785A1 (en) * 2013-04-16 2014-10-16 Ford Global Technologies, Llc Bumper structure for a vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009040187A (en) * 2007-08-08 2009-02-26 Aisin Seiki Co Ltd Vehicular bumper device
JP2009248818A (en) * 2008-04-08 2009-10-29 Honda Motor Co Ltd Vehicular body front structure
US8789874B2 (en) 2011-03-30 2014-07-29 Fuji Jukogyo Kabushiki Kaisha Front vehicle body structure
JP2016055755A (en) * 2014-09-09 2016-04-21 トヨタ自動車株式会社 Vehicle front part structure
US9676268B2 (en) 2014-09-09 2017-06-13 Toyota Jidosha Kabushiki Kaisha Vehicle front section structure
JP2018058532A (en) * 2016-10-07 2018-04-12 トヨタ自動車東日本株式会社 Impact absorption structure of vehicle front part

Also Published As

Publication number Publication date
JP4297016B2 (en) 2009-07-15

Similar Documents

Publication Publication Date Title
JP5949600B2 (en) Front body structure of the vehicle
JP5907147B2 (en) Lower body structure
JP4525802B2 (en) Vehicle skeleton structure
US10611410B2 (en) Front chassis structure for automobile
US8651564B2 (en) Polygonal cross-sectional frame, and rear vehicle body structure
US20140327254A1 (en) Front vehicle body structure
JP5597682B2 (en) Body frame structure
JP2003002247A (en) Front structure of vehicle body
US8491049B2 (en) Frontal structure of vehicle
JP5949532B2 (en) Rear bumper reinforcement structure and vehicle rear structure
JP2016537253A (en) Body
CN114435286A (en) Subframe for vehicle
JP5954203B2 (en) Front body structure of the vehicle
JP4297016B2 (en) Body front structure
JP6027448B2 (en) Body front structure
JP5954204B2 (en) Front body structure of the vehicle
JP5896827B2 (en) Auto body frame structure
JP4297075B2 (en) Body front structure
JP2014040209A (en) Vehicle body lower structure of vehicle
JP7496065B2 (en) Vehicle front structure
JP5669595B2 (en) Vehicle body front
JP4396264B2 (en) Body front structure
JP4304464B2 (en) Front body structure of the vehicle
JP7129749B2 (en) vehicle structure
JP2017226307A (en) Vehicle front part structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061016

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20081001

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20081111

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090108

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090324

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090406

R151 Written notification of patent or utility model registration

Ref document number: 4297016

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120424

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120424

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130424

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140424

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees