JP2018122766A - Vehicle front structure - Google Patents

Vehicle front structure Download PDF

Info

Publication number
JP2018122766A
JP2018122766A JP2017017504A JP2017017504A JP2018122766A JP 2018122766 A JP2018122766 A JP 2018122766A JP 2017017504 A JP2017017504 A JP 2017017504A JP 2017017504 A JP2017017504 A JP 2017017504A JP 2018122766 A JP2018122766 A JP 2018122766A
Authority
JP
Japan
Prior art keywords
vehicle
end portion
collision
view
width direction
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
JP2017017504A
Other languages
Japanese (ja)
Other versions
JP6747319B2 (en
Inventor
宏 行木
Hiroshi Nameki
宏 行木
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 JP2017017504A priority Critical patent/JP6747319B2/en
Publication of JP2018122766A publication Critical patent/JP2018122766A/en
Application granted granted Critical
Publication of JP6747319B2 publication Critical patent/JP6747319B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Body Structure For Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle front structure which generates lateral force on a vehicle in front surface off-set collision of a vehicle, and can move the vehicle to a direction where collision of a collision object to the vehicle is avoided.SOLUTION: A vehicle front structure 18 comprises: a suspension member 20; and a second member 22 which extends to a front side of a vehicle cross direction from the suspension member 20, and has a bent part which is inclined outward of a vehicle width direction from a vehicle rear side to a front end part 22A side on the front end part 22A in vehicle plane view. A rear side of a front side attachment part 36 on the front end part 22A of the second member 22 has formed a bending start point part 42 which is bent to a vehicle upper side from the vehicle rear side to the front end part 22A side in vehicle side view, and buckles the front end part 22A to an upper direction of a vehicle vertical direction, and the front end part 22A is arranged on a position where the front end part is lapped to a drive train 26 in a height direction in vehicle side view.SELECTED DRAWING: Figure 2

Description

本発明は、車両前部構造に関する。   The present invention relates to a vehicle front structure.

下記特許文献1には、センタクロスメンバ(サスペンションメンバ)の車両前方側に配置されるサイドメンバを備え、サイドメンバが車両幅方向の内方側に傾斜しつつ車両前後方向の後方側に延びた構造が開示されている。なお、サイドメンバに車両幅方向外側へ突出する突出部材を設け、微小ラップ衝突時に車両に対して横力を発生させる構造として、特許文献2に記載されたものがある。   The following Patent Document 1 includes a side member disposed on the vehicle front side of a center cross member (suspension member), and the side member extends rearward in the vehicle front-rear direction while inclining inward in the vehicle width direction. A structure is disclosed. In addition, there exists a thing described in patent document 2 as a structure which provides the side member with the protrusion member which protrudes to the vehicle width direction outer side, and generates a lateral force with respect to a vehicle at the time of a micro lap collision.

特開2013−129221号公報JP 2013-129221 A 特開2015−058793号公報JP2015-058793A

上記特許文献1に記載の構造では、車両の衝突時にサイドメンバの前方部が変形することにより、衝突荷重の吸収部として機能するように構成している。しかし、特許文献1に記載の構造では、微小ラップ衝突時にサイドメンバにより車両に対して横力を加える構造については記載されておらず、改善の余地がある。   The structure described in Patent Document 1 is configured to function as a collision load absorbing portion by deforming the front portion of the side member at the time of a vehicle collision. However, the structure described in Patent Document 1 does not describe a structure in which a lateral force is applied to the vehicle by a side member at the time of a minute lap collision, and there is room for improvement.

本発明は上記事実を考慮し、車両の前面オフセット衝突時に、車両に横力を発生させ、車両を衝突物から回避する方向に移動させることができる車両前部構造を得ることが目的である。   In view of the above facts, an object of the present invention is to obtain a vehicle front structure capable of generating a lateral force in a vehicle and moving the vehicle in a direction to avoid the collision object at the time of a front offset collision of the vehicle.

請求項1の発明に係る車両前部構造は、サスペンションメンバと、前記サスペンションメンバから車両前後方向の前方側に延在され、車両平面視にて車両前後方向の前端部に車両後方側から前記前端部側に向かって車両幅方向の外方側に傾斜する湾曲部を備えたサイドメンバと、前記サイドメンバの前記前端部における車体側の締結部の後方に形成され、車両側面視にて前記前端部が車両のドライブトレインと高さ方向でラップする位置に配置されると共に、車両後方側から前記前端部側に向かって車両上方側に湾曲し、前記前端部を車両上下方向の上方向に座屈させる曲げ起点部と、を有する。   According to a first aspect of the present invention, a vehicle front portion structure extends from the suspension member to the front side in the vehicle front-rear direction from the suspension member, and extends from the vehicle rear side to the front end portion in the vehicle front-rear direction in a vehicle plan view. A side member having a curved portion that inclines outward in the vehicle width direction toward the vehicle side, and a rear side of a fastening portion on the vehicle body side at the front end portion of the side member, and the front end in a side view of the vehicle Is disposed at a position that wraps in the height direction with the drive train of the vehicle, curves from the vehicle rear side toward the front end portion toward the vehicle upper side, and seats the front end portion upward in the vehicle vertical direction. A bending start point portion to be bent.

請求項1記載の本発明によれば、サスペンションメンバから車両前後方向の前方側にサイドメンバが延在されている。サイドメンバの車両前後方向の前端部には、車両後方側から前端部側に向かって車両幅方向の外方側に傾斜する湾曲部が設けられている。また、サイドメンバの前端部における車体側の締結部の後方には、車両側面視にて車両後方側から前端部側に向かって車両上方側に湾曲し、前端部を車両上下方向の上方向に座屈させる曲げ起点部が形成されている。さらに、車両側面視にてサイドメンバの前端部が車両のドライブトレインと高さ方向でラップする位置に配置されている。これにより、車両の前面オフセット衝突時(例えば、オブリーク衝突時又は微小ラップ衝突時)に、サイドメンバの前端部が湾曲部により車両幅方向の内方側に座屈すると共に、サイドメンバの前端部が曲げ起点部により車両上下方向の上方向に座屈する。このため、サイドメンバの前端部の座屈した部分がドライブトレインと接触する。これによって、車両に横力を発生させることができ、車両を衝突物から回避する方向に移動させることができる。   According to the first aspect of the present invention, the side member extends from the suspension member to the front side in the vehicle front-rear direction. A curved portion that inclines outward in the vehicle width direction from the vehicle rear side toward the front end portion side is provided at the front end portion of the side member in the vehicle front-rear direction. Further, behind the fastening portion on the vehicle body side at the front end portion of the side member, the vehicle is bent upward from the vehicle rear side toward the front end portion in a side view of the vehicle, and the front end portion is directed upward in the vehicle vertical direction. A bending start point for buckling is formed. Furthermore, the front end portion of the side member is disposed at a position where it wraps in the height direction with the drive train of the vehicle in a side view of the vehicle. As a result, the front end of the side member is buckled inward in the vehicle width direction by the curved portion at the time of a front offset collision of the vehicle (for example, at the time of an oblique collision or a minute lap collision), and the front end of the side member is It buckles upward in the vehicle vertical direction by the bending start point. For this reason, the buckled portion of the front end portion of the side member comes into contact with the drive train. Thereby, a lateral force can be generated in the vehicle, and the vehicle can be moved in a direction avoiding the collision object.

本発明に係る車両前部構造によれば、車両の前面オフセット衝突時に、車両に横力を発生させ、車両を衝突物から回避する方向に移動させることができる。   According to the vehicle front structure according to the present invention, a lateral force can be generated in the vehicle at the time of a front offset collision of the vehicle, and the vehicle can be moved in a direction to avoid the collision object.

一実施形態に係る車両前部構造を示す側面図である。It is a side view showing the vehicle front part structure concerning one embodiment. 一実施形態に係る車両前部構造を拡大した状態で示す側面図である。It is a side view shown in the state where the vehicle front part structure concerning one embodiment was expanded. 一実施形態に係る車両前部構造を示す平面図である。It is a top view which shows the vehicle front part structure which concerns on one Embodiment. 一実施形態に係る車両前部構造の車両幅方向の一方の外側部分を拡大した状態で示す平面図である。It is a top view shown in the state where one outside portion of the vehicle width direction of the vehicle front part structure concerning one embodiment was expanded. 車両の前面オフセット衝突時のサイドメンバの変形状態を模式的に示す底面図である。It is a bottom view which shows typically the deformation state of the side member at the time of front offset collision of vehicles.

以下、図1〜図5を用いて、本発明に係る車両前部構造の一実施形態について説明する。なお、これらの図において適宜示される矢印FRは車両前方側を示しており、矢印UPは車両上方側を示しており、矢印OUTは車両幅方向外側を示している。また、図において適宜示されるDNは、車両上下方向の下側を示している。   Hereinafter, an embodiment of a vehicle front structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side. Further, DN appropriately shown in the figure indicates the lower side of the vehicle vertical direction.

図1には、本実施形態に係る車両前部構造18が適用された車両10の前部11が側面図にて示されており、図2には、車両前部構造18が適用された車両10の前部11が拡大された状態で側面図にて示されている。図3には、車両前部構造18が適用された車両10の前部11が平面図にて示されており、図4には、車両前部構造18が適用された車両10の前部11の車両幅方向の一方側(車両背面視にて車両幅方向左側)が拡大された状態で平面図にて示されている。図1〜図4に示されるように、自動車の車両10の前部11の幅方向外側には、略車両前後方向に沿って延在されるフロントサイドメンバ12が設けられている。フロントサイドメンバ12は、車両骨格部材を構成している。フロントサイドメンバ12の前端部の車両前方側には、クラッシュボックス14が設けられている(図1及び図2参照)。クラッシュボックス14は、フロントサイドメンバ12の前部12Aの車両前方に配置された板状の取付部13を介して締結具(図示省略)等により取り付けられている。   FIG. 1 is a side view showing a front portion 11 of a vehicle 10 to which a vehicle front structure 18 according to this embodiment is applied. FIG. 2 shows a vehicle to which a vehicle front structure 18 is applied. 10 is shown in a side view with the front part 11 enlarged. FIG. 3 is a plan view showing the front portion 11 of the vehicle 10 to which the vehicle front structure 18 is applied, and FIG. 4 shows the front portion 11 of the vehicle 10 to which the vehicle front structure 18 is applied. Is shown in a plan view in an enlarged state on one side in the vehicle width direction (left side in the vehicle width direction when viewed from the back of the vehicle). As shown in FIGS. 1 to 4, a front side member 12 extending substantially along the vehicle front-rear direction is provided on the outer side in the width direction of the front portion 11 of the vehicle 10 of the automobile. The front side member 12 constitutes a vehicle skeleton member. A crash box 14 is provided on the front side of the front end of the front side member 12 (see FIGS. 1 and 2). The crash box 14 is attached by a fastener (not shown) or the like via a plate-like attachment portion 13 disposed in front of the vehicle of the front portion 12A of the front side member 12.

フロントサイドメンバ12及びクラッシュボックス14は、車両10の幅方向両端部に左右一対で配置されている(図3参照)。クラッシュボックス14は、略車両前後方向に配置された筒状部を備えており、衝突荷重の入力時に軸方向に圧縮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。車両10の幅方向両側のクラッシュボックス14の車両前方側には、略車両幅方向に沿って延在されるフロントバンパリインフォース16が取り付けられている(図3参照)。フロントバンパリインフォース16は、車両幅方向中央部が車両幅方向両端部よりも車両前方側に突出するように湾曲して形成されている。   The front side member 12 and the crash box 14 are arranged in a pair of left and right at both ends in the width direction of the vehicle 10 (see FIG. 3). The crash box 14 includes a cylindrical portion disposed substantially in the vehicle front-rear direction, and absorbs collision energy by compressing and deforming in the axial direction when a collision load is input. Front bumper reinforcements 16 extending substantially along the vehicle width direction are attached to the vehicle front side of the crash boxes 14 on both sides in the width direction of the vehicle 10 (see FIG. 3). The front bumper reinforcement 16 is formed to be curved so that the center in the vehicle width direction protrudes toward the vehicle front side from both ends in the vehicle width direction.

フロントサイドメンバ12の後部12Bは、車両上下方向の下方側に傾斜しつつ車両前後方向の後方側に延びている(図1及び図2参照)。フロントサイドメンバ12の後部12Bの後端下部には、サスペンションメンバ20が取り付けられている。サスペンションメンバ20は、車両幅方向に沿って配置されており、左右一対のフロントサイドメンバ12を繋ぐ構成とされている(図3参照)。サスペンションメンバ20は、車両平面視にて左右対称に形成されている。サスペンションメンバ20は、フロントサイドメンバ12の後部12Bの後端下部から車両前方側に略水平方向に延びている(図1及び図2参照)。サスペンションメンバ20には、サスペンションメンバ20から略車両前後方向の前方側に延在されるサイドメンバとしての第二メンバ22が設けられている。第二メンバ22は、車両幅方向外側に左右一対で配置されており、左右一対の第二メンバ22は、車両平面視にて左右対称に形成されている(図3参照)。車両平面視にて第二メンバ22は、それぞれフロントサイドメンバ12の車両上下方向の下方側に配置されている。   The rear portion 12B of the front side member 12 extends rearward in the vehicle front-rear direction while inclining downward in the vehicle vertical direction (see FIGS. 1 and 2). A suspension member 20 is attached to the rear lower portion of the rear portion 12B of the front side member 12. The suspension member 20 is disposed along the vehicle width direction, and is configured to connect the pair of left and right front side members 12 (see FIG. 3). The suspension member 20 is formed symmetrically in the vehicle plan view. The suspension member 20 extends in a substantially horizontal direction from the lower rear end of the rear portion 12B of the front side member 12 to the front side of the vehicle (see FIGS. 1 and 2). The suspension member 20 is provided with a second member 22 as a side member that extends from the suspension member 20 to the front side in the vehicle longitudinal direction. The pair of left and right members 22 are disposed on the outer side in the vehicle width direction, and the pair of left and right second members 22 are formed symmetrically in plan view of the vehicle (see FIG. 3). The second members 22 are respectively arranged on the lower side of the front side member 12 in the vehicle vertical direction in the vehicle plan view.

図3及び図4に示されるように、第二メンバ22は、車両前後方向の前端部22Aから車両幅方向の内方側に傾斜しつつ車両前後方向の後方側に延びており、第二メンバ22の後端部22Bは、サスペンションメンバ20の前部側に接合されている。第二メンバ22の前端部22Aの構成については、後述する。   As shown in FIGS. 3 and 4, the second member 22 extends from the front end portion 22A in the vehicle front-rear direction to the rear side in the vehicle front-rear direction while inclining inward in the vehicle width direction. The rear end 22 </ b> B of 22 is joined to the front side of the suspension member 20. The configuration of the front end portion 22A of the second member 22 will be described later.

図1及び図2に示されるように、サスペンションメンバ20の前部には、車両上方側に突出する突出部28が設けられており、突出部28がフロントサイドメンバ12の下側取付部12Cに図示しない締結具により固定されている。   As shown in FIGS. 1 and 2, the suspension member 20 is provided at the front portion with a protruding portion 28 that protrudes toward the upper side of the vehicle, and the protruding portion 28 is attached to the lower mounting portion 12 </ b> C of the front side member 12. It is fixed by a fastener (not shown).

また、第二メンバ22の前端部22Aには、略車両前後方向に延びたロアクラッシュボックス30が設けられている。ロアクラッシュボックス30は、第二メンバ22の前端部22Aの車両前方に配置された板状の取付部34を介して締結具(図示省略)等により取り付けられている。ロアクラッシュボックス30の前部には、略車両幅方向に沿って延在される連結部材32が設けられている。すなわち、連結部材32は、左右一対のロアクラッシュボックス30に架け渡されている。ロアクラッシュボックス30は、略車両前後方向に配置された筒状部を備えており、衝突荷重の入力時に軸方向に圧縮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。   Further, a lower crash box 30 that extends substantially in the vehicle front-rear direction is provided at the front end 22A of the second member 22. The lower crash box 30 is attached by a fastener (not shown) or the like via a plate-like attachment portion 34 disposed in front of the front end portion 22A of the second member 22. A connecting member 32 extending substantially along the vehicle width direction is provided at the front portion of the lower crash box 30. That is, the connecting member 32 is spanned between a pair of left and right lower crash boxes 30. The lower crash box 30 includes a cylindrical portion disposed substantially in the vehicle front-rear direction, and absorbs collision energy by compressing and deforming in the axial direction when a collision load is input.

第二メンバ22の前端部22Aの取付部34には、車両上方側に延びた締結部としての前側取付部36が設けられている。前側取付部36の上部は、フロントサイドメンバ12の前部12Aの先端部に図示しない締結具により固定されている。なお、フロントサイドメンバ12の前部12Aは、本発明の「車体側」の部材の一例である。また、サスペンションメンバ20には、ロアアーム46を介してフロントタイヤ48が回転自在に支持されている(図3及び図4参照)。   A mounting portion 34 of the front end portion 22A of the second member 22 is provided with a front mounting portion 36 as a fastening portion extending to the vehicle upper side. The upper part of the front attachment portion 36 is fixed to the front end portion of the front portion 12A of the front side member 12 by a fastener (not shown). The front portion 12A of the front side member 12 is an example of the “vehicle body side” member of the present invention. Further, a front tire 48 is rotatably supported on the suspension member 20 via a lower arm 46 (see FIGS. 3 and 4).

図3及び図4に示されるように、車両10の前部11には、左右一対のフロントサイドメンバ12の車両幅方向の内側に、車両10を駆動するドライブトレイン(「パワーユニット」という場合がある)26が配置されている。車両平面視にて第二メンバ22の前端部22Aには、車両前後方向の後方側から前端部22A側に向かって車両幅方向の外方側に傾斜する湾曲部40が設けられている。すなわち、第二メンバ22の湾曲部40の後方側は車両幅方向内側に配置されており、第二メンバ22の湾曲部40の前方側は車両幅方向外側に配置されている。本実施形態では、車両平面視にて第二メンバ22の後方側は、略車両前後方向に沿って延びており、湾曲部40(特に第二メンバ22の車両外側の壁部)は、第二メンバ22の後方側から前端部22A側に向かって車両幅方向の外方側に屈曲させた構成とされている。   As shown in FIG. 3 and FIG. 4, the front portion 11 of the vehicle 10 has a drive train (a “power unit”) that drives the vehicle 10 inside the vehicle width direction of the pair of left and right front side members 12. ) 26 is arranged. The front end portion 22A of the second member 22 is provided with a curved portion 40 that inclines outward in the vehicle width direction from the rear side in the vehicle front-rear direction toward the front end portion 22A in the vehicle plan view. That is, the rear side of the curved portion 40 of the second member 22 is disposed on the inner side in the vehicle width direction, and the front side of the curved portion 40 of the second member 22 is disposed on the outer side in the vehicle width direction. In the present embodiment, the rear side of the second member 22 in the vehicle plan view extends substantially along the vehicle front-rear direction, and the curved portion 40 (particularly the vehicle outer wall portion of the second member 22) The member 22 is bent outward from the rear side of the member 22 toward the front end 22A.

湾曲部40は、第二メンバ22の前側をフロントサイドメンバ12の前部12Aに固定する前側取付部36の後方に設けられている。第二メンバ22の前端部22Aに湾曲部40を設けることで、車両10の前面オフセット衝突時(例えば、オブリーク衝突時又は微小ラップ衝突時)に、第二メンバ22の前端部22Aが、湾曲部40を起点(きっかけ)として車両幅方向内側に座屈するようになっている。   The bending portion 40 is provided behind the front attachment portion 36 that fixes the front side of the second member 22 to the front portion 12 </ b> A of the front side member 12. By providing the bending portion 40 at the front end portion 22A of the second member 22, the front end portion 22A of the second member 22 is bent at the front offset collision of the vehicle 10 (for example, at the time of oblique collision or minute lap collision). 40 starts from the starting point (trigger) and buckles inward in the vehicle width direction.

図1及び図2に示されるように、車両側面視にて第二メンバ22の前端部22Aにおける前側取付部36の後方には、車両前後方向の後方側から前端部22A側に向かって車両上方側に湾曲し(立上がり)、前端部22Aを車両上下方向の上方向に座屈させる曲げ起点部42が設けられている。すなわち、第二メンバ22の曲げ起点部42の後方側は車両上下方向の下側に配置されており、第二メンバ22の曲げ起点部42の前方側は車両上下方向の上側に配置されている。本実施形態では、車両側面視にて第二メンバ22の後方側は、略車両前後方向に沿って延びており、曲げ起点部42は、第二メンバ22の後方側から前端部22A側に向かって車両上下方向の上方側に傾斜するように屈曲させた構成とされている。   As shown in FIG. 1 and FIG. 2, in the vehicle side view, behind the front mounting portion 36 in the front end portion 22 </ b> A of the second member 22, the vehicle upper direction from the rear side in the vehicle front-rear direction toward the front end portion 22 </ b> A side. A bending starting point portion 42 that is curved to the side (rises) and buckles the front end portion 22A upward in the vehicle vertical direction is provided. That is, the rear side of the bending start point portion 42 of the second member 22 is disposed below the vehicle vertical direction, and the front side of the bending start point portion 42 of the second member 22 is disposed above the vehicle vertical direction. . In the present embodiment, the rear side of the second member 22 in the vehicle side view extends substantially along the vehicle front-rear direction, and the bending start portion 42 is directed from the rear side of the second member 22 toward the front end portion 22A. Thus, the vehicle is bent so as to incline upward in the vertical direction of the vehicle.

さらに、車両側面視にて第二メンバ22の前端部22A(曲げ起点部42の前側)は、ドライブトレイン26と高さ方向でラップする(重なる)位置に配置されている(図1及び図2参照)。また、本実施形態では、車両平面視にて第二メンバ22の前端部22Aは、ドライブトレイン26と上下方向に重なっておらず、第二メンバ22の前端部22Aの車両幅方向の内方側でドライブトレイン26と重なるように配置されている(図3及び図4参照)。   Furthermore, the front end portion 22A of the second member 22 (the front side of the bending start portion 42) is disposed at a position that overlaps (overlaps) with the drive train 26 in the height direction when viewed from the side of the vehicle (FIGS. 1 and 2). reference). Further, in the present embodiment, the front end portion 22A of the second member 22 does not overlap the drive train 26 in the vertical direction in the vehicle plan view, and the vehicle width direction inward side of the front end portion 22A of the second member 22 Thus, they are arranged so as to overlap the drive train 26 (see FIGS. 3 and 4).

第二メンバ22の前端部22Aに曲げ起点部42を設けることで、車両10の前面オフセット衝突時(例えば、オブリーク衝突時又は微小ラップ衝突時)に、曲げ起点部42を起点(きっかけ)として、第二メンバ22の前端部22Aを車両上下方向の上方側に座屈させるようになっている。本実施形態では、第二メンバ22の車両前後方向における前端部22Aのほぼ同じ位置に、湾曲部40と曲げ起点部42が設けられている。これにより、車両10の前面オフセット衝突時に、第二メンバ22の前端部22Aが、湾曲部40と曲げ起点部42により、車両幅方向内側に座屈すると共に車両上下方向の上方側に座屈するようになっている。   By providing the bending start point portion 42 at the front end portion 22A of the second member 22, the bending start point portion 42 is set as a starting point (trigger) at the time of a front offset collision of the vehicle 10 (for example, at the time of an oblique collision or a minute lap collision). The front end 22A of the second member 22 is buckled upward in the vehicle vertical direction. In the present embodiment, the bending portion 40 and the bending start point portion 42 are provided at substantially the same position of the front end portion 22A of the second member 22 in the vehicle longitudinal direction. Thereby, at the time of a front offset collision of the vehicle 10, the front end portion 22 </ b> A of the second member 22 is buckled inward in the vehicle width direction and buckled upward in the vehicle vertical direction by the bending portion 40 and the bending start point portion 42. It has become.

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

車両前部構造18では、サスペンションメンバ20から車両前後方向の前方側にサイドメンバとしての第二メンバ22が延在されている。車両平面視にて、第二メンバ22の前端部22Aには、車両前後方向の後方側から前端部22A側に向かって車両幅方向の外方側に傾斜する湾曲部40が設けられている(図3及び図4参照)。また、第二メンバ22の前端部22Aには、フロントサイドメンバ12に締結する前側取付部36の後方に、車両側面視にて車両後方側から前端部22A側に向かって車両上方側に湾曲し、前端部22Aを車両上下方向の上方向に座屈させる曲げ起点部42が形成されている(図1及び図2参照)。さらに、車両側面視にて第二メンバ22の前端部22Aがドライブトレイン26と高さ方向でラップする位置に配置されている(図1及び図2参照)。   In the vehicle front structure 18, a second member 22 as a side member extends from the suspension member 20 to the front side in the vehicle front-rear direction. In the vehicle plan view, the front end portion 22A of the second member 22 is provided with a curved portion 40 that inclines outward in the vehicle width direction from the rear side in the vehicle front-rear direction toward the front end portion 22A ( 3 and 4). Further, the front end portion 22A of the second member 22 is curved rearwardly of the front side attachment portion 36 fastened to the front side member 12, from the vehicle rear side toward the front end portion 22A side in the vehicle side view, toward the vehicle upper side. A bending starting point portion 42 is formed to buckle the front end portion 22A upward in the vehicle vertical direction (see FIGS. 1 and 2). Furthermore, the front end portion 22A of the second member 22 is disposed at a position where it wraps in the height direction with the drive train 26 in a side view of the vehicle (see FIGS. 1 and 2).

図5には、車両10の前部11がバリア50に前面オフセット衝突したとき(例えば、オブリーク衝突時又は微小ラップ衝突時)のCAE(Computer Aided Engineering)による解析結果が模式的に示されている。図5に示されるように、車両10の前部11がバリア50と前面オフセット衝突したとき、第二メンバ22の前端部22Aが湾曲部40により車両幅方向の内方側に座屈すると共に、第二メンバ22の前端部22Aが曲げ起点部42により車両上下方向の上方向に座屈する。これにより、第二メンバ22の前端部22Aの座屈した部分が、ドライブトレイン26の側方と接触する。このため、車両10に横力(車両幅方向で衝突側とは反対側へ向かう反力)を発生させることができ、車両10をバリア50から回避する方向に移動させることができる。また、車両10に横力(車両幅方向で衝突側とは反対側へ向かう反力)を発生させることで、ドライブトレイン26が配置されるエンジンルーム内でのエネルギー吸収量を増加させることができる。   FIG. 5 schematically shows an analysis result by CAE (Computer Aided Engineering) when the front portion 11 of the vehicle 10 collides with the barrier 50 in a front offset collision (for example, during an oblique collision or a minute lap collision). . As shown in FIG. 5, when the front portion 11 of the vehicle 10 collides with the barrier 50 and the front surface offset, the front end portion 22A of the second member 22 is buckled inward in the vehicle width direction by the curved portion 40, and The front end portion 22A of the two members 22 is buckled upward by the bending start point portion 42 in the vehicle vertical direction. As a result, the buckled portion of the front end 22 </ b> A of the second member 22 contacts the side of the drive train 26. Therefore, a lateral force (a reaction force toward the side opposite to the collision side in the vehicle width direction) can be generated in the vehicle 10, and the vehicle 10 can be moved in a direction avoiding the barrier 50. Further, by generating a lateral force (reaction force toward the side opposite to the collision side in the vehicle width direction) on the vehicle 10, the amount of energy absorbed in the engine room in which the drive train 26 is disposed can be increased. .

また、車両前部構造18では、フロントサイドメンバ12のみで衝突性能を担保する構成と比較して、サスペンションメンバ20から車両前方側に延在される第二メンバ22を使用することで、効率よく衝突エネルギーを吸収することができる。   Further, in the vehicle front structure 18, the use of the second member 22 that extends from the suspension member 20 to the vehicle front side is more efficient than the configuration that ensures the collision performance with only the front side member 12. The collision energy can be absorbed.

一方、比較例として、サスペンションメンバから車両前方側に延びた第二メンバを直線状に配置した車両前部構造について説明する。比較例の車両前部構造では、CAE解析結果によると、車両の前面オフセット衝突時(例えば、オブリーク衝突時又は微小ラップ衝突時)に、第二メンバが座屈せず、第二メンバがドライブトレインと接触しない。このため、第二メンバを利用して車両に横力を発生させることができない。   On the other hand, as a comparative example, a vehicle front structure in which a second member extending from the suspension member to the vehicle front side is arranged in a straight line will be described. In the vehicle front structure of the comparative example, according to the CAE analysis result, the second member does not buckle at the time of front offset collision of the vehicle (for example, at the time of oblique collision or minute lap collision), and the second member is Do not touch. For this reason, a lateral force cannot be generated in the vehicle using the second member.

なお、上記実施形態では、サイドメンバとしての第二メンバ22の前端部22Aに曲げ起点部42を設けたが、本発明は、この構成に限定されるものではない。例えば、サイドメンバが車両上方側に座屈するような折れ起点(きっかけ)を与えるビード(例えば、車両上方側に凸状に突出するビード)などの折れ起点部や、断面耐力差などを設けた構造としてもよい。   In the above embodiment, the bending start point portion 42 is provided at the front end portion 22A of the second member 22 as the side member. However, the present invention is not limited to this configuration. For example, a structure provided with a fold starting point portion such as a bead (for example, a bead protruding in a convex manner on the vehicle upper side) or a cross-sectional strength difference, etc., which gives a fold starting point (choke) such that the side member buckles to the vehicle upper side. It is good.

また、上記実施形態では、サイドメンバとしての第二メンバ22の前端部22Aに湾曲部40を設けたが、本発明は、この構成に限定されるものではない。例えば、サイドメンバが車両幅方向内側に座屈するような折れ起点(きっかけ)を与えるビード(例えば、車両幅方向内側に凸状に突出するビード)などの折れ起点部や、断面耐力差などを設けた構造としてもよい。   Moreover, in the said embodiment, although the curved part 40 was provided in 22 A of front-end parts of the 2nd member 22 as a side member, this invention is not limited to this structure. For example, a bending starting point portion such as a bead (for example, a bead protruding in the vehicle width direction in a convex manner) that gives a bending starting point (trigger) such that the side member buckles inward in the vehicle width direction, a cross-sectional strength difference, etc. are provided. It is good also as a structure.

また、上記実施形態では、第二メンバ22の車両前後方向における前端部22Aのほぼ同じ位置に、湾曲部40と曲げ起点部42が設けられているが、本発明はこれに限定するものではない。例えば、第二メンバ22の前端部22Aに、車両前後方向に位置をずらして、車両幅方向内側に座屈するような湾曲部などの折れ起点部等と、車両上方側に座屈するような曲げ起点部等とを設けてもよい。   Moreover, in the said embodiment, although the curved part 40 and the bending origin part 42 are provided in the substantially same position of 22 A of front-end parts in the vehicle front-back direction of the 2nd member 22, this invention is not limited to this. . For example, the front end 22A of the second member 22 is shifted in the vehicle front-rear direction and bent starting point such as a curved portion that buckles inward in the vehicle width direction, and a bending start point that buckles upward in the vehicle. And the like may be provided.

さらに、上記実施形態において、第二メンバ22の前端部22Aをフロントサイドメンバ12に固定する前側取付部36の構成は、変更が可能である。   Furthermore, in the said embodiment, the structure of the front side attaching part 36 which fixes 22 A of front-end parts of the 2nd member 22 to the front side member 12 can be changed.

10 車両
11 前部
12 フロントサイドメンバ(車体側)
18 車両前部構造
20 サスペンションメンバ
22 第二メンバ(サイドメンバ)
22A 前端部
26 ドライブトレイン
36 前側取付部(締結部)
40 湾曲部
42 曲げ起点部
10 Vehicle 11 Front 12 Front side member (vehicle body side)
18 Vehicle front structure 20 Suspension member 22 Second member (side member)
22A Front end portion 26 Drive train 36 Front side mounting portion (fastening portion)
40 Bending part 42 Bending origin part

Claims (1)

サスペンションメンバと、
前記サスペンションメンバから車両前後方向の前方側に延在され、車両平面視にて車両前後方向の前端部に車両後方側から前記前端部側に向かって車両幅方向の外方側に傾斜する湾曲部を備えたサイドメンバと、
前記サイドメンバの前記前端部における車体側の締結部の後方に形成され、車両側面視にて前記前端部が車両のドライブトレインと高さ方向でラップする位置に配置されると共に、車両後方側から前記前端部側に向かって車両上方側に湾曲し、前記前端部を車両上下方向の上方向に座屈させる曲げ起点部と、
を有する車両前部構造。
Suspension members,
A curved portion that extends from the suspension member to the front side in the vehicle front-rear direction and inclines toward the front end portion in the vehicle front-rear direction from the vehicle rear side toward the front end portion side in the vehicle width direction in a vehicle plan view. A side member with
It is formed behind the fastening portion on the vehicle body side at the front end portion of the side member, and is arranged at a position where the front end portion wraps in the height direction with the drive train of the vehicle in a side view of the vehicle. A bending starting point portion that curves toward the vehicle upper side toward the front end portion and buckles the front end portion in the vehicle up-down direction;
A vehicle front structure having:
JP2017017504A 2017-02-02 2017-02-02 Vehicle front structure Expired - Fee Related JP6747319B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017017504A JP6747319B2 (en) 2017-02-02 2017-02-02 Vehicle front structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017017504A JP6747319B2 (en) 2017-02-02 2017-02-02 Vehicle front structure

Publications (2)

Publication Number Publication Date
JP2018122766A true JP2018122766A (en) 2018-08-09
JP6747319B2 JP6747319B2 (en) 2020-08-26

Family

ID=63109273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017017504A Expired - Fee Related JP6747319B2 (en) 2017-02-02 2017-02-02 Vehicle front structure

Country Status (1)

Country Link
JP (1) JP6747319B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021154838A (en) * 2020-03-26 2021-10-07 日産自動車株式会社 Vehicular front suspension device

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003252233A (en) * 2002-02-27 2003-09-10 Nissan Motor Co Ltd Subframe of vehicle
JP2004123027A (en) * 2002-10-04 2004-04-22 Nissan Motor Co Ltd Structure of car body front part
JP2013006503A (en) * 2011-06-24 2013-01-10 Mazda Motor Corp Lower vehicle body structure of vehicle
JP2013129221A (en) * 2011-12-20 2013-07-04 Mazda Motor Corp Front subframe structure of vehicle
JP2013256266A (en) * 2012-06-14 2013-12-26 Toyota Motor Corp Vehicle body front structure
WO2014162880A1 (en) * 2013-04-05 2014-10-09 日産自動車株式会社 Vehicle body front portion structure
US20140360798A1 (en) * 2013-06-07 2014-12-11 Fiat Group Automobiles S.P.A. Motor vehicle provided with a release system to uncouple a cross member in the engine compartment in the event of a front crash
JP2015030375A (en) * 2013-08-02 2015-02-16 トヨタ自動車株式会社 Vehicle body front part structure of motor car
JP2015058793A (en) * 2013-09-18 2015-03-30 トヨタ自動車株式会社 Vehicle body front part structure
JP2015227167A (en) * 2015-09-25 2015-12-17 トヨタ自動車株式会社 Vehicle body front structure of automobile
JP2016117433A (en) * 2014-12-22 2016-06-30 トヨタ自動車株式会社 Vehicle front structure
JP2016222248A (en) * 2016-10-03 2016-12-28 トヨタ自動車株式会社 Vehicle body front part structure

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003252233A (en) * 2002-02-27 2003-09-10 Nissan Motor Co Ltd Subframe of vehicle
JP2004123027A (en) * 2002-10-04 2004-04-22 Nissan Motor Co Ltd Structure of car body front part
JP2013006503A (en) * 2011-06-24 2013-01-10 Mazda Motor Corp Lower vehicle body structure of vehicle
JP2013129221A (en) * 2011-12-20 2013-07-04 Mazda Motor Corp Front subframe structure of vehicle
JP2013256266A (en) * 2012-06-14 2013-12-26 Toyota Motor Corp Vehicle body front structure
WO2014162880A1 (en) * 2013-04-05 2014-10-09 日産自動車株式会社 Vehicle body front portion structure
US20140360798A1 (en) * 2013-06-07 2014-12-11 Fiat Group Automobiles S.P.A. Motor vehicle provided with a release system to uncouple a cross member in the engine compartment in the event of a front crash
JP2015030375A (en) * 2013-08-02 2015-02-16 トヨタ自動車株式会社 Vehicle body front part structure of motor car
JP2015058793A (en) * 2013-09-18 2015-03-30 トヨタ自動車株式会社 Vehicle body front part structure
JP2016117433A (en) * 2014-12-22 2016-06-30 トヨタ自動車株式会社 Vehicle front structure
JP2015227167A (en) * 2015-09-25 2015-12-17 トヨタ自動車株式会社 Vehicle body front structure of automobile
JP2016222248A (en) * 2016-10-03 2016-12-28 トヨタ自動車株式会社 Vehicle body front part structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021154838A (en) * 2020-03-26 2021-10-07 日産自動車株式会社 Vehicular front suspension device
JP7419921B2 (en) 2020-03-26 2024-01-23 日産自動車株式会社 Vehicle front suspension device

Also Published As

Publication number Publication date
JP6747319B2 (en) 2020-08-26

Similar Documents

Publication Publication Date Title
JP5907147B2 (en) Lower body structure
JP6048318B2 (en) Body front structure
JP5979084B2 (en) Body front structure
JP5907126B2 (en) Auto body front structure
JP6187447B2 (en) Vehicle front structure
JP2016037074A (en) Vehicle front structure
JP2009184430A (en) Vehicle hood structure
JP2010070133A (en) Car body structure
JP2015209111A (en) Vehicle front structure
JP2014004990A (en) Vehicle body frame structure
JP6156356B2 (en) Vehicle rear structure
JP2006315440A (en) Floor structure of vehicle
JP2019064516A (en) Vehicle body lower structure
WO2015068556A1 (en) Rear body structure of vehicle
JP2004123027A (en) Structure of car body front part
JP2014184857A (en) Vehicle front structure
JP2008068795A (en) Vehicular hood structure
JP5297687B2 (en) Vehicle hood structure
JP2011126399A (en) Front bumper of automobile
JP6575317B2 (en) Vehicle front structure
JP6747319B2 (en) Vehicle front structure
JP2013111990A (en) Vehicular knee bolster
JP2015113026A (en) Vehicle lower part structure
JP2008201195A (en) Vehicle body structure
JP7059808B2 (en) Vehicle glove box connection structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190423

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20200206

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200212

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200409

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: 20200707

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200720

R151 Written notification of patent or utility model registration

Ref document number: 6747319

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

LAPS Cancellation because of no payment of annual fees