JP5803691B2 - Body front structure - Google Patents

Body front structure Download PDF

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JP5803691B2
JP5803691B2 JP2012009341A JP2012009341A JP5803691B2 JP 5803691 B2 JP5803691 B2 JP 5803691B2 JP 2012009341 A JP2012009341 A JP 2012009341A JP 2012009341 A JP2012009341 A JP 2012009341A JP 5803691 B2 JP5803691 B2 JP 5803691B2
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side member
vehicle
end portion
front side
panel
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JP2013147159A (en
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俊弘 五嶋
俊弘 五嶋
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Toyota Motor Corp
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Description

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

従来から、平板状のインナパネルと断面ハット形状のアウタパネルとを結合して構成されたフロントサイドメンバ（サイドメンバ）を備えた車両の車体前部構造が知られている（例えば、特許文献１）。また、フロントサイドメンバと、当該フロントサイドメンバの後端部に結合されたエクステンションメンバとを備えた車体のフロント構造が知られている（例えば、特許文献２）。特許文献２に開示された車体のフロント構造では、前側ボルトによってエクステンションメンバの下面（底面部）にサスペンションメンバが取り付けられている。このエクステンションメンバの下面は、サスペンションメンバの取付強度を確保するための補強プレートによって補強されている。   2. Description of the Related Art Conventionally, a vehicle body front structure having a front side member (side member) configured by connecting a flat inner panel and an outer panel having a hat-shaped cross section is known (for example, Patent Document 1). . Further, a front structure of a vehicle body including a front side member and an extension member coupled to a rear end portion of the front side member is known (for example, Patent Document 2). In the front structure of a vehicle body disclosed in Patent Document 2, a suspension member is attached to the lower surface (bottom surface) of the extension member by a front bolt. The lower surface of the extension member is reinforced by a reinforcing plate for securing the attachment strength of the suspension member.

特開２０００−１６８６２４号公報JP 2000-168624 A 特開平１０−０８６８５３号公報JP 10-086853 A

ところで、平板状のアウタパネルと、上下にフランジ部を有する断面ハット形状のインナパネルとを結合して構成されたフロントサイドメンバ前部の後端部に対し、上側が開口された開断面形状を有するフロントサイドメンバ後部の前端部を下方から結合してフロントサイドメンバを構成することが考えられる。この場合、フロントサイドメンバ前部の後端部において、インナパネルの下壁部とフロントサイドメンバ後部の底壁部とを当接させるために、インナパネルの下壁部から下方へ延出する下側フランジ部及びアウタパネルの下端部を切除すると、当該後端部において閉断面を構成することが困難になり、フロントサイドメンバ前部の剛性が低下する可能性がある。また、アウタパネルの下端部を切除せずにインナパネル側へ折り曲げ、当該インナパネルの下壁部と結合して閉断面を構成することが考えられるが、この場合、アウタパネルの下端部に切り欠き等を形成する必要があるため、フロントサイドメンバ前部の剛性が低下する可能性がある。   By the way, it has an open cross-sectional shape in which the upper side is opened with respect to the rear end portion of the front side member front portion formed by combining a flat outer panel and a cross-sectional hat-shaped inner panel having flange portions above and below. It is conceivable to configure the front side member by connecting the front end portion of the rear portion of the front side member from below. In this case, at the rear end portion of the front side member front portion, in order to bring the lower wall portion of the inner panel and the bottom wall portion of the rear portion of the front side member into contact with each other, the bottom extending from the lower wall portion of the inner panel is lowered. When the side flange portion and the lower end portion of the outer panel are cut away, it becomes difficult to form a closed cross section at the rear end portion, and the rigidity of the front portion of the front side member may be reduced. In addition, it is conceivable that the outer panel is bent to the inner panel side without cutting the lower end portion and is combined with the lower wall portion of the inner panel to form a closed cross section. In this case, the lower end portion of the outer panel is notched, etc. Therefore, the rigidity of the front part of the front side member may be reduced.

一方、特許文献２に開示された車体のフロント構造では、前述したようにサスペンションメンバの取付強度を確保するために、補強プレートによってエクステンションメンバの下面を補強する必要があるため、部品点数が増加する。   On the other hand, in the front structure of the vehicle body disclosed in Patent Document 2, it is necessary to reinforce the lower surface of the extension member with a reinforcing plate in order to secure the mounting strength of the suspension member as described above, and thus the number of parts increases. .

本発明は、上記の事実を考慮し、フロントサイドメンバ前部の剛性の低下を抑制すると共に、部品点数を低減しつつ、フロントサイドメンバ後部に対するサスペンションメンバの取付強度を高めることができる車体前部構造を得ることを目的とする。   In consideration of the above-described facts, the present invention suppresses a decrease in rigidity of the front side member front part, and reduces the number of parts while increasing the attachment strength of the suspension member to the rear part of the front side member. The purpose is to obtain a structure.

請求項１に記載の車両前部構造は、平板状に形成された第１パネルと、前記第１パネルと車両幅方向に対向すると共に該第１パネル側を開口した断面ハット形状に形成され、前記第１パネルとで閉断面を構成する第２パネルとを有し、車両前部の両側に車両前後方向を長手方向としてそれぞれ配置されたフロントサイドメンバ前部と、前記フロントサイドメンバ前部の車両前後方向の後側に車両前後方向を長手方向として配置されると共に車両前後方向の前端部が車両上下方向の上側を開口した開断面形状に形成され、前記開口を閉じるように前記前端部に挿入された前記フロントサイドメンバ前部の車両前後方向の後端部と結合されて該フロントサイドメンバ前部とで閉断面を構成するフロントサイドメンバ後部と、前記フロントサイドメンバ後部の前記前端部の車両上下方向の下側に配置されたフロントサスペンションメンバと、前記フロントサイドメンバ前部の前記後端部と前記フロントサイドメンバ後部の前記前端部とで構成された閉断面の内側に少なくとも一部が配置されると共に車両上下方向を軸方向として配置され、上端側が前記フロントサイドメンバ前部の下壁部に結合されたナット部と、前記ナット部の下端部から径方向の外側へ張り出すと共に、前記フロントサイドメンバ後部の底壁部が車両上下方向の下側から当接された張出し部と、前記フロントサイドメンバ後部の前記底壁部に形成された貫通孔を車両上下方向に貫通して前記ナット部に締結され、該ナット部に前記フロントサスペンションメンバを取り付けるボルトと、を備えている。 The vehicle front structure according to claim 1 is formed in a first panel formed in a flat plate shape, a cross-sectional hat shape facing the first panel in the vehicle width direction and opening the first panel side, A front panel having a second panel that forms a closed cross-section with the first panel, and disposed on both sides of the front portion of the vehicle with the vehicle front-rear direction as a longitudinal direction, and a front side member front portion The vehicle front-rear direction is disposed on the rear side of the vehicle front-rear direction and the front end in the vehicle front-rear direction is formed in an open cross-sectional shape that opens the upper side in the vehicle vertical direction, and the front end is closed so as to close the opening A front side member rear portion coupled to a rear end portion of the inserted front side member front portion in the vehicle front-rear direction to form a closed cross section with the front side member front portion; and the front side member A closed cross section composed of a front suspension member disposed on the lower side in the vehicle vertical direction of the front end portion of the rear portion of the bar, the rear end portion of the front portion of the front side member, and the front end portion of the rear portion of the front side member. At least part of which is disposed the placed Rutotomoni vehicle vertical direction as an axial direction, and a nut portion which is upper end coupled to the lower wall portion of the front side member front, radially from the lower end portion of the nut portion of the inner And a through-hole formed in the bottom wall portion of the rear portion of the front side member, and a protruding portion in which the bottom wall portion of the rear portion of the front side member is in contact with the lower side in the vehicle vertical direction. A bolt that penetrates in the vertical direction and is fastened to the nut portion, and that attaches the front suspension member to the nut portion .

請求項１に係る車両前部構造によれば、フロントサイドメンバ後部の車両前後方向の前端部は、車両上下方向の上側を開口した開断面形状に形成されている。この開口を閉じるようにフロントサイドメンバ後部の前端部にフロントサイドメンバ前部の車両前後方向の後端部が挿入され、これらのフロントサイドメンバ後部の前端部とフロントサイドメンバ前部の後端部とが結合されている。これにより、フロントサイドメンバ後部の前端部とフロントサイドメンバ前部の後端部とによって閉断面が構成されている。   According to the vehicle front structure according to the first aspect, the front end portion of the rear side of the front side member in the vehicle front-rear direction is formed in an open cross-sectional shape having an upper side in the vehicle vertical direction. The rear end of the front side member front portion in the vehicle front-rear direction is inserted into the front end of the rear portion of the front side member so as to close this opening, and the front end portion of the front side member rear portion and the rear end portion of the front side member front portion And are combined. Thereby, the closed cross section is comprised by the front-end part of a front side member rear part, and the rear-end part of a front side member front part.

このようにフロントサイドメンバ後部の前端部とフロントサイドメンバ前部の後端部とによって閉断面を構成することにより、即ち、フロントサイドメンバ前部の下壁部とフロントサイドメンバ後部の底壁部との間に間隔を空けたことにより、フロントサイドメンバ前部の後端部の断面形状を変えずに、フロントサイドメンバ前部の後端部とフロントサイドメンバ後部の前端部とを結合することができる。これにより、フロントサイドメンバ前部の第１パネルに切り欠き等を形成する必要がないため、フロントサイドメンバ前部の剛性の低下が抑制される。   Thus, by forming a closed cross section with the front end of the front side member rear and the rear end of the front side member front, that is, the lower wall of the front side member front and the bottom wall of the front side member rear The front end of the front side member and the rear end of the front side member are joined to each other without changing the cross-sectional shape of the rear end of the front side member. Can do. Thereby, since it is not necessary to form a notch etc. in the 1st panel of a front side member front part, the fall of the rigidity of a front side member front part is suppressed.

また、フロントサイドメンバ後部の前端部とフロントサイドメンバ前部の後端部とによって閉断面を構成したことにより、フロントサイドメンバ後部の前端部とフロントサイドメンバ前部の後端部との結合部の曲げ剛性が高くなる。   In addition, a closed section is formed by the front end portion of the front side member rear portion and the rear end portion of the front side member front portion, thereby connecting the front end portion of the front side member rear portion and the rear end portion of the front side member front portion. The bending rigidity of the is increased.

更に、これらのフロントサイドメンバ後部の前端部とフロントサイドメンバ前部の後端部とによって構成された閉断面の内側には、ナット部の少なくとも一部が配置されている。このナット部は、車両上下方向を軸方向として配置され、上端側がフロントサイドメンバ前部の下壁部に結合される。また、ナット部の下端部からは、張出し部が径方向の外側へ張り出している。この張出し部には、車両上下方向の下側からフロントサイドメンバ後部の底壁部が当接されている。このフロントサイドメンバ後部の底壁部に形成された貫通孔を車両上下方向に貫通するボルトをナット部に締結することにより、フロントサイドメンバ後部にフロントサスペンションメンバが取り付けられている。これにより、ナット部及び張出し部によってフロントサイドメンバ前部の下壁部とフロントサイドメンバ後部の底壁部とが連結されるため、フロントサイドメンバ後部の前端部とフロントサイドメンバ前部の後端部との結合部の曲げ剛性 が更に高くなると共に、フロントサスペンションメンバの取付強度が高くなる。つまり、ナット部及び張出し部は、フロントサイドメンバ前部の後端部とフロントサイドメンバ後部の前端部との結合部を補強する補強部材としても機能する。従って、フロントサイドメンバ前部の後端部とフロントサイドメンバ後部の前端部との結合部に新たな補強部材を設ける必要がないため、部品点数を低減しつつ、フロントサイドメンバ後部の前端部に対するサスペンションメンバの取付強度を高めることができる。 Further, at least a part of the nut portion is disposed inside the closed cross section formed by the front end portion of the rear portion of the front side member and the rear end portion of the front portion of the front side member. The nut portion is disposed with the vehicle vertical direction as the axial direction, and the upper end side is coupled to the lower wall portion of the front side member front portion . Moreover, the overhang | projection part has protruded to the outer side of radial direction from the lower end part of a nut part. A bottom wall portion of the rear portion of the front side member is in contact with the projecting portion from the lower side in the vehicle vertical direction. The front suspension member is attached to the rear portion of the front side member by fastening a bolt that penetrates the through hole formed in the bottom wall portion of the rear portion of the front side member in the vehicle vertical direction to the nut portion. Accordingly, the lower wall portion of the front side member front portion and the bottom wall portion of the rear portion of the front side member are coupled by the nut portion and the overhang portion , so that the front end portion of the front side member rear portion and the rear end of the front side member front portion are connected. The bending rigidity of the joint portion with the portion is further increased, and the mounting strength of the front suspension member is increased. That is, the nut portion and the overhanging portion also function as a reinforcing member that reinforces the coupling portion between the rear end portion of the front side member front portion and the front end portion of the front side member rear portion. Therefore, it is not necessary to provide a new reinforcing member at the joint between the rear end portion of the front side member front portion and the front end portion of the front side member rear portion, so that the number of parts is reduced and the front end portion of the front side member rear portion is reduced. The attachment strength of the suspension member can be increased.

また、ナット部の下端部から径方向の外側へ張り出した張出し部に車両上下方向の下側からフロントサイドメンバ後部の底壁部を当接させたことにより、張出し部がフロントサイドメンバ後部の底壁部に当接しない構成と比較してナット部の倒れが抑制される。従って、フロントサイドメンバ後部の前端部に対するフロントサスペンションメンバの取付強度が更に高くなる。 Further , the projecting portion is made to contact the bottom wall of the rear side of the front side member by contacting the bottom wall portion of the rear side of the front side member from the lower side in the vehicle vertical direction to the projecting portion that projects radially outward from the lower end portion of the nut portion. Compared with a configuration that does not contact the wall, the fall of the nut is suppressed. Therefore, the attachment strength of the front suspension member to the front end portion of the rear portion of the front side member is further increased.

請求項２に記載の車両前部構造は、請求項１に記載の車体前部構造において、前記第２パネルが、前記第１パネルの下端部と結合された下側フランジ部を有し、前記フロントサイドメンバ後部の前記底壁部が、前記下側フランジ部と車両上下方向に間隔 を空けて配置されている。 The vehicle front portion structure according to claim 2 is the vehicle body front portion structure according to claim 1 , wherein the second panel has a lower flange portion coupled to a lower end portion of the first panel, The bottom wall portion at the rear portion of the front side member is disposed at a distance from the lower flange portion in the vehicle vertical direction.

請求項２に係る車両前部構造によれば、フロントサイドメンバ後部の底壁部が、フロントサイドメンバ前部の第２パネルの下側フランジ部と車両上下方向に間隔 を空けて配置されている。これにより、フロントサイドメンバ後部の底壁部が第２パネルの下側フランジ部と接触する構成と比較して、フロントサイドメンバ前部の下壁部とフロントサイドメンバ後部の底壁部との間隔 が広くなる。従って、フロントサイドメンバ前部の後端部とフロントサイドメンバ後部の前端部との結合部の断面二次モーメントが増大するため、当該結合部の曲げ剛性 が更に高くなる。 According to the vehicle front structure according to the second aspect , the bottom wall portion of the rear portion of the front side member is disposed at a distance from the lower flange portion of the second panel of the front side member front portion in the vehicle vertical direction. . Accordingly, the distance between the lower wall portion of the front side member front portion and the bottom wall portion of the front side member rear portion is compared with the configuration in which the bottom wall portion of the rear portion of the front side member is in contact with the lower flange portion of the second panel. Becomes wider. Therefore, since the secondary moment of section of the joint between the rear end portion of the front side member front portion and the front end portion of the front side member rear portion is increased, the bending rigidity of the joint portion is further increased.

以上説明したように、本発明に係る車両前部構造によれば、フロントサイドメンバ前部の剛性の低下を抑制すると共に、部品点数を低減しつつ、フロントサイドメンバ後部に対するサスペンションメンバの取付強度を高めることができる。   As described above, according to the vehicle front structure according to the present invention, it is possible to reduce the rigidity of the front side member front part and reduce the number of parts while reducing the mounting strength of the suspension member to the rear part of the front side member. Can be increased.

本発明の一実施形態におけるフロントサイドメンバを示す斜視図である。It is a perspective view which shows the front side member in one Embodiment of this invention. 図１に示されるフロントサイドメンバを車両幅方向の外側から見た側面図である。It is the side view which looked at the front side member shown by FIG. 1 from the outer side of the vehicle width direction. 図２の３−３線断面図である。FIG. 3 is a sectional view taken along line 3-3 in FIG. 2.

以下、図面を参照しながら、本発明の一実施形態に係る車体前部構造について説明する。なお、各図において適宜示される矢印ＦＲは車両前後方向の前側を示し、矢印ＵＰは車両上下方向の上側を示し、矢印ＬＨは車両幅方向の外側（車体左側）を示している。   A vehicle body front structure according to an embodiment of the present invention will be described below with reference to the drawings. It should be noted that an arrow FR appropriately shown in each drawing indicates the front side in the vehicle longitudinal direction, an arrow UP indicates the upper side in the vehicle vertical direction, and an arrow LH indicates the outside in the vehicle width direction (the left side of the vehicle body).

図１には、本実施形態に係る車体前部構造１０を構成するフロントサイドメンバ１２を示す斜視図が示されており、図２には、フロントサイドメンバ１２を車両幅方向の外側（車体左側）から見た側面図が示されている。図１及び図２に示されるように、フロントサイドメンバ１２は、車両前部における車両幅方向の両側に車両前後方向を長手方向としてそれぞれ配置されている。フロントサイドメンバ１２の車両前後方向の前端部は、図示しないクラッシュボックスを介して車両前端側に設けられたバンパーリインフォースメントに連結されている。なお、図１には、車体左側に配置されたフロントサイドメンバ１２が示されている。   FIG. 1 is a perspective view showing a front side member 12 constituting a vehicle body front structure 10 according to the present embodiment. FIG. 2 shows the front side member 12 outside the vehicle width direction (the vehicle left side). The side view seen from) is shown. As shown in FIGS. 1 and 2, the front side member 12 is arranged on both sides of the vehicle front portion in the vehicle width direction with the vehicle front-rear direction as the longitudinal direction. The front end portion of the front side member 12 in the vehicle front-rear direction is connected to a bumper reinforcement provided on the vehicle front end side via a crash box (not shown). FIG. 1 shows a front side member 12 disposed on the left side of the vehicle body.

フロントサイドメンバ１２は、車両前後方向の前部を構成するフロントサイドメンバ前部２０と、車両前後方向の後部を構成するフロントサイドメンバ後部４０とを備えている。フロントサイドメンバ前部（以下、単に「サイドメンバ前部」ともいう）２０は、第１パネルとしてのアウタパネル２２と、第２パネルとしてのインナパネル２４とを有している。アウタパネル２２は平板状に形成されており、車両前後方向に沿って配置されている。このアウタパネル２２の車両幅方向の内側には、インナパネル２４が配置されている。   The front side member 12 includes a front side member front portion 20 constituting a front portion in the vehicle front-rear direction and a front side member rear portion 40 constituting a rear portion in the vehicle front-rear direction. The front side member front part (hereinafter also simply referred to as “side member front part”) 20 has an outer panel 22 as a first panel and an inner panel 24 as a second panel. The outer panel 22 is formed in a flat plate shape and is disposed along the vehicle front-rear direction. An inner panel 24 is disposed inside the outer panel 22 in the vehicle width direction.

インナパネル２４は、車両幅方向の外側が開口された断面ハット形状に形成されており、アウタパネル２２と車両幅方向に対向している。インナパネル２４は、車両幅方向の外側が開口された開断面形状（断面略Ｃ字形状）を成すパネル本体部２６と、パネル本体部２６の上端部から車両上下方向の上側へ延出された上側フランジ部２８と、パネル本体部２６の下端部から車両上下方向の下側へ延出された下側フランジ部３０とを有している。パネル本体部２６は、車両上下方向に対向する上壁部２６Ｕ及び下壁部２６Ｌと、これらの上壁部２６Ｕ及び下壁部２６Ｌの車両幅方向の内側の端部同士を接続する側壁部２６Ｓとを有している。   The inner panel 24 is formed in a cross-sectional hat shape that is open on the outer side in the vehicle width direction, and faces the outer panel 22 in the vehicle width direction. The inner panel 24 extends from the upper end of the panel body 26 to the upper side in the vehicle vertical direction. The panel body 26 has an open cross-sectional shape (substantially C-shaped in cross section) that is open on the outside in the vehicle width direction. The upper flange portion 28 and the lower flange portion 30 extending from the lower end portion of the panel main body portion 26 to the lower side in the vehicle vertical direction are provided. The panel main body 26 includes an upper wall portion 26U and a lower wall portion 26L that face each other in the vehicle vertical direction, and a side wall portion 26S that connects the inner end portions of the upper wall portion 26U and the lower wall portion 26L in the vehicle width direction. And have.

インナパネル２４の上側フランジ部２８及び下側フランジ部３０は、アウタパネル２２の車両上下方向の上端部２２Ｕ及び下端部２２Ｌにそれぞれ重ねられており、これらの上端部２２Ｕ及び下端部２２Ｌに溶接等により結合されている。これにより、インナパネル２４とアウタパネル２２とによって閉断面が構成されている。また、本実施形態では、サイドメンバ前部２０の断面形状は、その車両前後方向（長手方向）の全長にわたって略一定とされている。   The upper flange portion 28 and the lower flange portion 30 of the inner panel 24 are overlapped with the upper end portion 22U and the lower end portion 22L of the outer panel 22 in the vehicle vertical direction, respectively, and are welded to the upper end portion 22U and the lower end portion 22L by welding or the like. Are combined. Thereby, the inner panel 24 and the outer panel 22 form a closed cross section. Further, in the present embodiment, the cross-sectional shape of the side member front portion 20 is substantially constant over the entire length in the vehicle front-rear direction (longitudinal direction).

サイドメンバ前部２０の車両前後方向の後側には、フロントサイドメンバ後部４０が配置されている。フロントサイドメンバ後部（以下、単に「サイドメンバ後部」という）４０は車両前後方向を長手方向として配置されており、その車両前後方向の前端部４０Ｆがサイドメンバ前部２０の車両前後方向の後端部２０Ｒに結合されている。また、サイドメンバ後部４０は、その前端部４０Ｆに対して傾斜するキック部４０Ｋを有している。キック部４０Ｋは、図示しないダッシュパネルの下部に沿って車両前後方向の後側かつ車両上下方向の下側へ傾斜されている。このキック部４０Ｋの車両前後方向の後端部は、図示しないフロアパネルを補強するフロアアンダーリインフォースメントの前端部に接続されている。   A front side member rear portion 40 is disposed behind the side member front portion 20 in the vehicle front-rear direction. The front side member rear portion (hereinafter simply referred to as “side member rear portion”) 40 is disposed with the vehicle longitudinal direction as the longitudinal direction, and the front end portion 40F in the vehicle longitudinal direction is the rear end of the side member front portion 20 in the vehicle longitudinal direction. It is coupled to the portion 20R. The side member rear portion 40 has a kick portion 40K that is inclined with respect to the front end portion 40F. The kick portion 40K is inclined to the rear side in the vehicle front-rear direction and the lower side in the vehicle vertical direction along the lower portion of the dash panel (not shown). A rear end portion of the kick portion 40K in the vehicle front-rear direction is connected to a front end portion of a floor under reinforcement that reinforces a floor panel (not shown).

サイドメンバ後部４０の前端部４０Ｆは、車両上下方向の上側が開口された開断面形状（断面略Ｃ字形状）に形成されており、車両幅方向に対向する一対の側壁部４０Ｓ１，４０Ｓ２と、これら一対の側壁部４０Ｓ１，４０Ｓ２の下端部同士を接続する底壁部４０Ｌとを有している。これら一対の側壁部４０Ｓ１，４０Ｓ２の間には開口４２が形成されており、この開口４２を閉じるようにサイドメンバ前部２０の後端部２０Ｒにおける下部が一対の側壁部４０Ｓ１，４０Ｓ２の間へ挿入されている。   The front end portion 40F of the side member rear portion 40 is formed in an open cross-sectional shape (a substantially C-shaped cross-section) that is open on the upper side in the vehicle vertical direction, and a pair of side wall portions 40S1 and 40S2 that face each other in the vehicle width direction, It has the bottom wall part 40L which connects the lower end parts of these pair of side wall parts 40S1 and 40S2. An opening 42 is formed between the pair of side wall portions 40S1 and 40S2, and the lower portion of the rear end portion 20R of the side member front portion 20 extends between the pair of side wall portions 40S1 and 40S2 so as to close the opening 42. Has been inserted.

図３に示されるように、サイドメンバ後部４０の前端部４０Ｆにおける車両幅方向の外側の側壁部４０Ｓ１は、サイドメンバ前部２０のアウタパネル２２の下端部２２Ｌを挟んでインナパネル２４の下側フランジ部３０と対向して配置され、これらのアウタパネル２２の下端部２２Ｌ及びインナパネル２４の下側フランジ部３０に溶接等により結合されている。   As shown in FIG. 3, the side wall portion 40S1 on the outer side in the vehicle width direction at the front end portion 40F of the side member rear portion 40 is a lower flange of the inner panel 24 across the lower end portion 22L of the outer panel 22 of the side member front portion 20. It arrange | positions facing the part 30, and is couple | bonded with the lower end part 22L of these outer panels 22 and the lower side flange part 30 of the inner panel 24 by welding etc. FIG.

一方、サイドメンバ後部４０の前端部４０Ｆにおける車両幅方向の内側の側壁部４０Ｓ２は、サイドメンバ前部２０のインナパネル２４の側壁部２６Ｓに重ねられて、当該側壁部２６Ｓに溶接等に結合されている。なお、一対の側壁部４０Ｓ１，４０Ｓ２のうち、車両幅方向の内側に配置された側壁部４０Ｓ２の高さ（車両上下方向の長さ）は、車両幅方向の外側に配置された側壁部４０Ｓ１の高さよりも高くされている。   On the other hand, an inner side wall portion 40S2 in the vehicle width direction at the front end portion 40F of the side member rear portion 40 is overlapped with the side wall portion 26S of the inner panel 24 of the side member front portion 20, and is coupled to the side wall portion 26S by welding or the like. ing. Of the pair of side wall portions 40S1 and 40S2, the height of the side wall portion 40S2 disposed on the inner side in the vehicle width direction (the length in the vehicle vertical direction) is the same as that of the side wall portion 40S1 disposed on the outer side in the vehicle width direction. It is higher than the height.

また、サイドメンバ前部２０の後端部２０Ｒとサイドメンバ後部４０の前端部４０Ｆとは、インナパネル２４の下側フランジ部３０とサイドメンバ後部４０の底壁部４０Ｌとの間に車両上下方向に間隔Ｌを空けた状態で結合されている。これにより、インナパネル２４の下側フランジ部３０とサイドメンバ後部４０の底壁部４０Ｌとが接触する構成と比較して、インナパネル２４の下壁部２６Ｌとサイドメンバ後部４０の底壁部４０Ｌとの間隔Ｍが広くなっており、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとの結合部の車両上下方向の曲げ剛性が高くなっている。   Further, the rear end portion 20R of the side member front portion 20 and the front end portion 40F of the side member rear portion 40 are arranged in the vehicle vertical direction between the lower flange portion 30 of the inner panel 24 and the bottom wall portion 40L of the side member rear portion 40. Are connected with an interval L therebetween. Accordingly, the lower wall portion 26L of the inner panel 24 and the bottom wall portion 40L of the side member rear portion 40 are compared with the configuration in which the lower flange portion 30 of the inner panel 24 and the bottom wall portion 40L of the side member rear portion 40 are in contact with each other. And the bending rigidity in the vehicle vertical direction of the connecting portion between the front end portion 40F of the side member rear portion 40 and the rear end portion 20R of the side member front portion 20 is increased.

ここで、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとによって構成された閉断面の内側には、後述するフロントサスペンションメンバ６０が取り付けられる取付部としての取付ナット５０の一部が設けられている。取付ナット５０は、フロントサスペンションメンバ６０を取り付けるためのボルト５４が締結されるナット部５０Ａと、ナット部５０Ａの下端部に設けられた張出し部５０Ｂとを有している。   Here, inside the closed cross section formed by the front end portion 40F of the side member rear portion 40 and the rear end portion 20R of the side member front portion 20, a mounting nut 50 as a mounting portion to which a front suspension member 60 described later is mounted. A part of is provided. The attachment nut 50 has a nut portion 50A to which a bolt 54 for attaching the front suspension member 60 is fastened, and an overhang portion 50B provided at the lower end portion of the nut portion 50A.

ナット部５０Ａは、車両上下方向を軸方向として配置されている。このナット部５０Ａの上端部は、サイドメンバ前部２０の下壁部２６Ｌに形成された貫通孔５２に車両上下方向に貫通されており、当該下壁部２６Ｌに溶接されている。一方、ナット部５０Ａの下端部には、張出し部５０Ｂが設けられている。この張出し部５０Ｂは、ナット部５０Ａの軸方向から見てリング状に形成されており、ナット部５０Ａの下端部から径方向の外側へ張り出している。この張出し部５０Ｂには、車両上下方向の下側からサイドメンバ後部４０の底壁部４０Ｌが当接されている。また、サイドメンバ後部４０の前端部４０Ｆにおける底壁部４０Ｌには、ボルト５４が車両上下方向に貫通される貫通孔５６が形成されている。   The nut portion 50A is arranged with the vehicle vertical direction as the axial direction. The upper end portion of the nut portion 50A is penetrated in the vehicle vertical direction through a through hole 52 formed in the lower wall portion 26L of the side member front portion 20, and is welded to the lower wall portion 26L. On the other hand, a protruding portion 50B is provided at the lower end of the nut portion 50A. The projecting portion 50B is formed in a ring shape when viewed from the axial direction of the nut portion 50A, and projects outward from the lower end portion of the nut portion 50A in the radial direction. A bottom wall portion 40L of the side member rear portion 40 is in contact with the protruding portion 50B from the lower side in the vehicle vertical direction. Further, a through-hole 56 through which the bolt 54 penetrates in the vehicle vertical direction is formed in the bottom wall portion 40L of the front end portion 40F of the side member rear portion 40.

サイドメンバ後部４０の前端部４０Ｆの車両上下方向の下側には、図示しないフロントサスペンションを構成するフロントサスペンションメンバ６０が配置されている。フロントサスペンションメンバ（以下、単に「サスペンションメンバ」ともいう）６０は、車両幅方向を長手方向として配置されており、車両幅方向の外側の端部６０Ａがサイドメンバ後部４０の車両上下方向の下側に配置されている。このサスペンションメンバ６０の端部６０Ａには、ボルト５４が車両上下方向に貫通されている。このボルト５４をサイドメンバ後部４０の底壁部４０Ｌに形成された貫通孔５２を通して取付ナット５０のナット部５０Ａに締結することにより、サスペンションメンバ６０の端部６０Ａがサイドメンバ後部４０の前端部４０Ｆに取り付けられている。   A front suspension member 60 constituting a front suspension (not shown) is disposed below the front end portion 40F of the side member rear portion 40 in the vehicle vertical direction. A front suspension member (hereinafter, also simply referred to as “suspension member”) 60 is disposed with the vehicle width direction as a longitudinal direction, and an outer end portion 60A in the vehicle width direction is a lower side of the side member rear portion 40 in the vehicle vertical direction. Is arranged. A bolt 54 passes through the end 60A of the suspension member 60 in the vehicle vertical direction. The bolt 54 is fastened to the nut portion 50A of the mounting nut 50 through the through hole 52 formed in the bottom wall portion 40L of the side member rear portion 40, so that the end portion 60A of the suspension member 60 becomes the front end portion 40F of the side member rear portion 40. Is attached.

次に、本実施形態に係る車両前部構造の作用について説明する。   Next, the operation of the vehicle front structure according to this embodiment will be described.

図３に示されるように、サイドメンバ後部４０の前端部４０Ｆは、車両上下方向の上側を開口した開断面形状に形成されている。このサイドメンバ後部４０の前端部４０Ｆにおける一対の側壁部４０Ｓ１，４０Ｓ２の間には、これらの側壁部４０Ｓ１，４０Ｓ２の間に形成された開口４２を閉じるようにサイドメンバ前部２０の後端部２０Ｒの下部が挿入されている。各側壁部４０Ｓ１，４０Ｓ２は、サイドメンバ前部２０の後端部２０Ｒにおけるアウタパネル２２の下端部２２Ｌ及びインナパネル２４の側壁部２６Ｓにそれぞれ溶接等により結合されている。これにより、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとが結合されている。また、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとは、サイドメンバ後部４０の底壁部４０Ｌとインナパネル２４の下側フランジ部３０との間に間隔Ｌを空けた状態で結合されている。これにより、サイドメンバ後部４０の前端部４０Ｆ及びサイドメンバ前部２０の後端部２０Ｒによって閉断面が構成されている。   As shown in FIG. 3, the front end portion 40F of the side member rear portion 40 is formed in an open cross-sectional shape having an upper side in the vehicle vertical direction. Between the pair of side wall portions 40S1 and 40S2 at the front end portion 40F of the side member rear portion 40, the rear end portion of the side member front portion 20 is closed so as to close the opening 42 formed between the side wall portions 40S1 and 40S2. The lower part of 20R is inserted. The side wall portions 40S1 and 40S2 are coupled to the lower end portion 22L of the outer panel 22 and the side wall portion 26S of the inner panel 24 at the rear end portion 20R of the side member front portion 20 by welding or the like. Thereby, the front end part 40F of the side member rear part 40 and the rear end part 20R of the side member front part 20 are joined. Further, the front end portion 40F of the side member rear portion 40 and the rear end portion 20R of the side member front portion 20 have a gap L between the bottom wall portion 40L of the side member rear portion 40 and the lower flange portion 30 of the inner panel 24. Combined in an empty state. Thus, a closed cross section is formed by the front end portion 40F of the side member rear portion 40 and the rear end portion 20R of the side member front portion 20.

このようにサイドメンバ後部４０の底壁部４０Ｌとサイドメンバ前部２０の下側フランジ部３０との間に間隔Ｌを空けたことにより、サイドメンバ前部２０の後端部２０Ｒの断面形状を変えずに、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとを結合することができる。即ち、サイドメンバ前部２０の断面形状をその長手方向の全長にわたって略一定にすることができる。   As described above, the space L is provided between the bottom wall portion 40L of the side member rear portion 40 and the lower flange portion 30 of the side member front portion 20, whereby the cross-sectional shape of the rear end portion 20R of the side member front portion 20 is increased. Without change, the front end portion 40F of the side member rear portion 40 and the rear end portion 20R of the side member front portion 20 can be combined. That is, the cross-sectional shape of the side member front portion 20 can be made substantially constant over the entire length in the longitudinal direction.

一方、サイドメンバ前部２０の後端部２０Ｒにおいて、サイドメンバ前部２０の下壁部２６Ｌとサイドメンバ後部４０の底壁部４０Ｌとを当接させるために、サイドメンバ前部２０の下壁部２６Ｌから車両上下方向の下側へ延出する下側フランジ部３０及びアウタパネル２２の下端部２２Ｌを切除すると、当該後端部２０Ｒにおいて閉断面を構成することが困難になり、サイドメンバ前部２０の剛性が低下する可能性がある。また、アウタパネル２２の下端部２２Ｌを切除せずにインナパネル２４側へ折り曲げ、当該インナパネル２４の下壁部２６Ｌと結合して閉断面を構成することが考えられるが、この場合、アウタパネル２２の下端部２２Ｌに折り曲げ加工用の切り欠き等を形成する必要があるため、サイドメンバ前部２０の剛性が低下する可能性がある。   On the other hand, at the rear end portion 20R of the side member front portion 20, the lower wall portion 26L of the side member front portion 20 and the bottom wall portion 40L of the side member rear portion 40 are brought into contact with each other. If the lower flange portion 30 extending from the portion 26L to the lower side in the vehicle vertical direction and the lower end portion 22L of the outer panel 22 are cut away, it becomes difficult to form a closed cross section at the rear end portion 20R, and the side member front portion The rigidity of 20 may be reduced. Further, it is conceivable that the outer panel 22 is bent toward the inner panel 24 without cutting the lower end portion 22L, and is combined with the lower wall portion 26L of the inner panel 24 to form a closed cross section. Since it is necessary to form a notch or the like for bending at the lower end 22L, the rigidity of the side member front portion 20 may be reduced.

これに対して本実施形態では、前述したようにサイドメンバ前部２０の断面形状をその長手方向の全長にわたって略一定にすることができる。従って、サイドメンバ前部２０の後端部２０Ｒの剛性の低下を抑制しつつ、当該後端部２０Ｒとサイドメンバ後部４０の前端部４０Ｆとを結合することができる。   On the other hand, in the present embodiment, as described above, the cross-sectional shape of the side member front portion 20 can be made substantially constant over the entire length in the longitudinal direction. Therefore, the rear end portion 20R and the front end portion 40F of the side member rear portion 40 can be coupled while suppressing a decrease in rigidity of the rear end portion 20R of the side member front portion 20.

また、インナパネル２４の下側フランジ部３０とサイドメンバ後部４０の底壁部４０Ｌとの間に間隔Ｌを空けた状態でサイドメンバ前部２０の後端部２０Ｒとサイドメンバ後部４０の前端部４０Ｆとを結合することにより、サイドメンバ前部２０の後端部２０Ｒ及びサイドメンバ後部４０の前端部４０Ｆによって閉断面が構成される。これにより、インナパネル２４の下側フランジ部３０とサイドメンバ後部４０の底壁部４０Ｌとが接触した構成と比較して、サイドメンバ前部２０の下壁部２６Ｌとサイドメンバ後部４０の底壁部４０Ｌとの間隔Ｍが広くなる。従って、サイドメンバ前部２０の後端部２０Ｒとサイドメンバ後部４０の前端部４０Ｆとの結合部の断面二次モーメントが増大するため、当該結合部の曲げ剛性が更に高くなる。   Further, the rear end portion 20R of the side member front portion 20 and the front end portion of the side member rear portion 40 with a gap L between the lower flange portion 30 of the inner panel 24 and the bottom wall portion 40L of the side member rear portion 40. 40F is combined with the rear end portion 20R of the side member front portion 20 and the front end portion 40F of the side member rear portion 40 to form a closed cross section. Thereby, compared with the structure which the lower side flange part 30 of the inner panel 24 and the bottom wall part 40L of the side member rear part 40 contacted, the bottom wall part 26L of the side member front part 20 and the bottom wall of the side member rear part 40 The interval M with the portion 40L becomes wider. Accordingly, the second moment of section of the joint between the rear end portion 20R of the side member front portion 20 and the front end portion 40F of the side member rear portion 40 is increased, so that the bending rigidity of the joint portion is further increased.

更に、これらのサイドメンバ前部２０の後端部２０Ｒとサイドメンバ後部４０の前端部４０Ｆとによって構成された閉断面の内側には、取付ナット５０の一部が設けられている。この取付ナット５０のナット部５０Ａに、サイドメンバ後部４０の底壁部４０Ｌ及びサスペンションメンバ６０の端部６０Ａを車両上下方向に貫通するボルト５４を締結することにより、サイドメンバ後部４０の前端部４０Ｆにサスペンションメンバ６０の端部６０Ａが取り付けられている。   Further, a part of the mounting nut 50 is provided inside the closed cross section formed by the rear end portion 20R of the side member front portion 20 and the front end portion 40F of the side member rear portion 40. A bolt 54 that passes through the bottom wall portion 40L of the side member rear portion 40 and the end portion 60A of the suspension member 60 in the vehicle vertical direction is fastened to the nut portion 50A of the mounting nut 50, whereby the front end portion 40F of the side member rear portion 40 is secured. An end portion 60A of the suspension member 60 is attached to the suspension member 60.

この取付ナット５０によってサイドメンバ後部４０の底壁部４０Ｌとサイドメンバ前部２０の下壁部２６Ｌとが連結されるため、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとの結合部における車両上下方向の曲げ剛性が更に高くなると共に、サスペンションメンバ６０の取付強度が高くなる。つまり、取付ナット５０は、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとの結合部を補強する補強部材としても機能する。従って、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとの結合部に新たな補強部材（例えば、補強プレートやバルク）を設ける必要がないため、部品点数を低減しつつ、サイドメンバ後部４０の前端部４０Ｆに対するサスペンションメンバ６０の端部６０Ａの取付強度を高めることができる。   Since the bottom wall portion 40L of the side member rear portion 40 and the lower wall portion 26L of the side member front portion 20 are connected by the mounting nut 50, the front end portion 40F of the side member rear portion 40 and the rear end portion of the side member front portion 20 are connected. The bending rigidity in the vehicle vertical direction at the joint with 20R is further increased, and the mounting strength of the suspension member 60 is increased. That is, the mounting nut 50 also functions as a reinforcing member that reinforces the joint between the front end portion 40F of the side member rear portion 40 and the rear end portion 20R of the side member front portion 20. Accordingly, it is not necessary to provide a new reinforcing member (for example, a reinforcing plate or a bulk) at the joint between the front end portion 40F of the side member rear portion 40 and the rear end portion 20R of the side member front portion 20, thereby reducing the number of parts. On the other hand, the attachment strength of the end portion 60A of the suspension member 60 with respect to the front end portion 40F of the side member rear portion 40 can be increased.

更にまた、取付ナット５０のナット部５０Ａの下端部には、張出し部５０Ｂが設けられている。張出し部５０Ｂは、ナット部５０Ａの下端部から径方向の外側へ張り出している。この張出し部５０Ｂにサイドメンバ後部４０の底壁部４０Ｌを車両上下方向の下側から当接（面接触）させたことにより、当該張出し部５０Ｂをサイドメンバ後部４０の底壁部４０Ｌに当接させない構成と比較して、ナット部５０Ａの倒れが抑制される。従って、サイドメンバ後部４０の前端部４０Ｆに対するサスペンションメンバ６０の端部６０Ａの取付強度が更に高くなる。   Furthermore, an overhang 50B is provided at the lower end of the nut 50A of the mounting nut 50. The overhang portion 50B projects outward in the radial direction from the lower end portion of the nut portion 50A. By contacting the bottom wall portion 40L of the side member rear portion 40 from the lower side in the vehicle vertical direction (surface contact) with the overhang portion 50B, the overhang portion 50B abuts against the bottom wall portion 40L of the side member rear portion 40. Compared with a configuration that does not allow the nut portion 50A to fall down. Accordingly, the attachment strength of the end portion 60A of the suspension member 60 with respect to the front end portion 40F of the side member rear portion 40 is further increased.

次に、上記実施形態に係る車体パネルの接合構造の変形例について説明する。   Next, a modified example of the vehicle body panel joint structure according to the embodiment will be described.

上記実施形態では、サイドメンバ前部２０のアウタパネル２２を平板状に形成すると共にサイドメンバ前部２０のインナパネル２４をアウタパネル２２側が開口された断面ハット形状に形成したが、これとは逆に、インナパネルを平板状に形成すると共にアウタパネルをインナパネル側が開口された断面ハット形状に形成しても良い。   In the above embodiment, the outer panel 22 of the side member front portion 20 is formed in a flat plate shape, and the inner panel 24 of the side member front portion 20 is formed in a cross-sectional hat shape with the outer panel 22 side opened. The inner panel may be formed in a flat plate shape, and the outer panel may be formed in a hat shape in cross section with the inner panel side opened.

また、上記実施形態では、サイドメンバ前部２０の後端部２０Ｒにおける下側フランジ部３０とサイドメンバ後部４０の前端部４０Ｆにおける底壁部４０Ｌとの間に間隔Ｌを空けた状態で、これらのサイドメンバ前部２０の後端部２０Ｒとサイドメンバ後部４０の前端部４０Ｆとを結合したがこれに限らない。即ち、サイドメンバ前部２０の後端部２０Ｒにおける下側フランジ部３０とサイドメンバ後部４０の前端部４０Ｆにおける底壁部４０Ｌとを接触させた状態で、これらのサイドメンバ前部２０の後端部２０Ｒとサイドメンバ後部４０の前端部４０Ｆとを結合しても良い。   Moreover, in the said embodiment, in the state which left the space | interval L between the lower flange part 30 in the rear end part 20R of the side member front part 20 and the bottom wall part 40L in the front end part 40F of the side member rear part 40, Although the rear end portion 20R of the side member front portion 20 and the front end portion 40F of the side member rear portion 40 are coupled, this is not restrictive. That is, in the state where the lower flange portion 30 at the rear end portion 20R of the side member front portion 20 and the bottom wall portion 40L at the front end portion 40F of the side member rear portion 40 are in contact with each other, the rear ends of these side member front portions 20 The portion 20R and the front end portion 40F of the side member rear portion 40 may be coupled.

更に、上記実施形態では、取付ナット５０のナット部５０Ａの下端部に張出し部５０Ｂを設けたが、当該張出し部５０Ｂは適宜省略可能である。この場合、ナット部５０Ａの下端部をサイドメンバ後部４０の底壁部４０Ｌに当接させれば良い。また、サイドメンバ後部４０の前端部４０Ｆとサイドメンバ前部２０の後端部２０Ｒとによって構成された閉断面の内側に取付ナット５０の全体を配置し、当該取付ナット５０の上端部をサイドメンバ前部２０の下壁部２６Ｌに結合しても良い。   Furthermore, in the said embodiment, although the overhang | projection part 50B was provided in the lower end part of the nut part 50A of the attachment nut 50, the said overhang | projection part 50B can be abbreviate | omitted suitably. In this case, the lower end portion of the nut portion 50A may be brought into contact with the bottom wall portion 40L of the side member rear portion 40. Further, the entire mounting nut 50 is disposed inside the closed cross section formed by the front end portion 40F of the side member rear portion 40 and the rear end portion 20R of the side member front portion 20, and the upper end portion of the mounting nut 50 is connected to the side member. You may couple | bond with the lower wall part 26L of the front part 20. FIG.

更にまた、上記実施形態では、サスペンションメンバ６０が取り付けられる取付部及びサスペンションメンバ６０を取付部に固定するための固定部材として取付ナット５０及びボルト５４を用いたがこれに限らず、従来周知の種々の取付部及び固定部材を用いることができる。   Furthermore, in the above embodiment, the mounting nut 50 and the bolt 54 are used as the mounting portion to which the suspension member 60 is mounted and the fixing member for fixing the suspension member 60 to the mounting portion. The attachment part and the fixing member can be used.

以上、本発明の一実施形態について説明したが、本発明はこうした実施形態に限定されるものではなく、一実施形態及び各種の変形例を適宜組み合わせて用いても良いし、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。   As mentioned above, although one embodiment of the present invention has been described, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be appropriately combined and the gist of the present invention may be used. Of course, various embodiments can be implemented without departing from the scope.

１０ 車体前部構造
１２ フロントサイドメンバ
２０ フロントサイドメンバ前部
２０Ｒ 後端部
２２ アウタパネル（第１パネル）
２４ インナパネル（第２パネル）
４０ フロントサイドメンバ後部
４０Ｆ 前端部
４２ 開口
５０ 取付ナット（取付部）
５０Ａ ナット部
５０Ｂ 張出し部
５４ ボルト（固定部材）
６０ フロントサスペンションメンバ DESCRIPTION OF SYMBOLS 10 Vehicle body front part structure 12 Front side member 20 Front side member front part 20R Rear end part 22 Outer panel (1st panel)
24 Inner panel (second panel)
40 Front side member rear portion 40F Front end portion 42 Opening 50 Mounting nut (mounting portion)
50A Nut 50B Overhang 54 Bolt (fixing member)
60 Front suspension member

Claims (2)

平板状に形成された第１パネルと、前記第１パネルと車両幅方向に対向すると共に該第１パネル側を開口した断面ハット形状に形成され、前記第１パネルとで閉断面を構成する第２パネルとを有し、車両前部の両側に車両前後方向を長手方向としてそれぞれ配置されたフロントサイドメンバ前部と、
前記フロントサイドメンバ前部の車両前後方向の後側に車両前後方向を長手方向として配置されると共に車両前後方向の前端部が車両上下方向の上側を開口した開断面形状に形成され、前記開口を閉じるように前記前端部に挿入された前記フロントサイドメンバ前部の車両前後方向の後端部と結合されて該フロントサイドメンバ前部とで閉断面を構成するフロントサイドメンバ後部と、
前記フロントサイドメンバ後部の前記前端部の車両上下方向の下側に配置されたフロントサスペンションメンバと、
前記フロントサイドメンバ前部の前記後端部と前記フロントサイドメンバ後部の前記前端部とで構成された閉断面の内側に少なくとも一部が配置されると共に車両上下方向を軸方向として配置され、上端側が前記フロントサイドメンバ前部の下壁部に結合されたナット部と、
前記ナット部の下端部から径方向の外側へ張り出すと共に、前記フロントサイドメンバ後部の底壁部が車両上下方向の下側から当接された張出し部と、
前記フロントサイドメンバ後部の前記底壁部に形成された貫通孔を車両上下方向に貫通して前記ナット部に締結され、該ナット部に前記フロントサスペンションメンバを取り付けるボルトと、
を備えた車体前部構造。 A first panel formed in a flat plate shape, a first hat formed in a cross-sectional hat shape that faces the first panel in the vehicle width direction and opens the first panel side, and forms a closed cross section with the first panel. Two front panels, front side member front parts arranged on both sides of the front part of the vehicle with the longitudinal direction of the vehicle as the longitudinal direction,
The vehicle front-rear direction is disposed on the rear side of the front side member front portion in the vehicle front-rear direction as a longitudinal direction, and the front end portion of the vehicle front-rear direction is formed in an open cross-sectional shape that opens the upper side in the vehicle vertical direction. A front side member rear portion which is coupled to a rear end portion of the front side member front portion of the front side member inserted in the front end portion so as to be closed and forms a closed section with the front side member front portion;
A front suspension member disposed on the lower side in the vehicle vertical direction of the front end portion of the front side member rear portion;
Wherein at least a portion the front side member front portion of the rear end portion inside the closed cross section constituted by said front side member rear portion of the front end portion is disposed is arranged Rutotomoni vehicle vertical direction as an axial direction, an upper end A nut portion whose side is coupled to the lower wall portion of the front side member front portion;
An overhanging portion in which the bottom wall portion of the rear portion of the front side member is in contact with the lower side of the vehicle in the vertical direction while projecting radially outward from the lower end of the nut portion;
A bolt that passes through a through hole formed in the bottom wall portion of the rear portion of the front side member in the vehicle vertical direction and is fastened to the nut portion, and the front suspension member is attached to the nut portion ;
Body front structure with 前記第２パネルが、前記第１パネルの下端部と結合された下側フランジ部を有し、The second panel has a lower flange coupled to a lower end of the first panel;
前記フロントサイドメンバ後部の前記底壁部が、前記下側フランジ部と車両上下方向に間隔The bottom wall portion at the rear of the front side member is spaced from the lower flange portion in the vehicle vertical direction. を空けて配置されている、Arranged with a gap,
請求項１に記載の車体前部構造。The vehicle body front part structure according to claim 1.
JP2012009341A 2012-01-19 2012-01-19 Body front structure Expired - Fee Related JP5803691B2 (en)

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JP3724079B2 (en) * 1996-09-12 2005-12-07 日産自動車株式会社 Body front structure
JP3506363B2 (en) * 1998-08-21 2004-03-15 日産車体株式会社 Front side member extension
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