JP7028000B2 - Rear body structure - Google Patents

Rear body structure Download PDF

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JP7028000B2
JP7028000B2 JP2018053188A JP2018053188A JP7028000B2 JP 7028000 B2 JP7028000 B2 JP 7028000B2 JP 2018053188 A JP2018053188 A JP 2018053188A JP 2018053188 A JP2018053188 A JP 2018053188A JP 7028000 B2 JP7028000 B2 JP 7028000B2
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vehicle
vehicle width
frame member
width direction
closed cross
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JP2019162996A (en
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英行 塚本
健 山田
晃義 益田
秀典 松岡
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Mazda Motor Corp
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Mazda Motor Corp
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Description

この発明は、リヤサスペンションダンパを支持するダンパ支持部と、車両前後方向に延びるリヤサイドフレーム等のフレーム部材とを備えた構成においてフレーム部材にダンパ支持部としての機能を持たせた後部車体構造に関する。 The present invention relates to a rear vehicle body structure in which a frame member has a function as a damper support portion in a configuration including a damper support portion that supports the rear suspension damper and a frame member such as a rear side frame extending in the front-rear direction of the vehicle.

特許文献1に例示されるように、車両の後部車体構造として、車両前後方向に延びるフレーム部材(リヤサイドフレーム(7))の車幅方向外側かつホイールハウスインナ(19)の車幅方向内側との間に、リヤサスペンションダンパ(以下「ダンパ」と略記する)を支持するダンパ支持部(サス取付部(33))が設けられた構成が従来より知られている。 As exemplified in Patent Document 1, as the rear body structure of the vehicle, the frame member (rear side frame (7)) extending in the front-rear direction of the vehicle is outside the vehicle width direction and the wheel house inner (19) is inside the vehicle width direction. Conventionally, it has been known that a damper support portion (suspension mounting portion (33)) for supporting a rear suspension damper (hereinafter abbreviated as "damper") is provided between them.

上述した特許文献1のように、フレーム部材とダンパ支持部とホイールハウスインナとを車幅方向に並べるのではなく、図13に示す車両の後部車体構造100のように、フレーム部材160に、その下面から上方へ窪んだ窪み部150を形成し、該窪み部150の凹底相当部位に貫通形成したダンパ挿通孔151に、下方から挿通したダンパ(図示省略)を支持する構成が考えられる。 Instead of arranging the frame member, the damper support portion, and the wheel house inner in the vehicle width direction as in Patent Document 1 described above, the frame member 160 is attached to the frame member 160 as in the rear body structure 100 of the vehicle shown in FIG. A configuration is conceivable in which a recessed portion 150 recessed upward from the lower surface is formed, and a damper (not shown) inserted from below is supported in the damper insertion hole 151 formed through the recessed bottom corresponding portion of the recessed portion 150.

しかしその場合、フレーム部材160の車両前後方向における窪み部150に相当する部位は、図13中のD-D線断面図としての図14に示すように、内部の閉断面がダンパに対して車幅方向内外各側に分岐した閉断面160sa,160sbとなることから、窪み部150以外の部位よりも閉断面が小さくなるため、上下方向荷重に対する曲げ強度(断面係数)を向上させるための対策が必要となる。 However , in that case, the portion corresponding to the recessed portion 150 in the vehicle front-rear direction of the frame member 160 has an internal closed cross section with respect to the damper, as shown in FIG. 14 as a cross-sectional view taken along the line DD in FIG. Since the closed cross section is 160sa, 160sb branched to each side in the vehicle width direction, the closed cross section is smaller than the part other than the recess 150, so measures to improve the bending strength (section coefficient) against the load in the vertical direction. Is required.

一方、フレーム部材の車両前後方向における窪み部に相当する部位は、車両走行時に上下動するダンパからの上下方向荷重を受け易いため、このダンパからの上下方向荷重に起因して作用する曲げ荷重、特にフレーム部材の車幅方向に延びる軸回りの曲げ荷重(ピッチモーメント)に対する対策が必要であった。 On the other hand, the portion of the frame member corresponding to the recessed portion in the vehicle front-rear direction is susceptible to a vertical load from a damper that moves up and down when the vehicle is running. In particular , it was necessary to take measures against the bending load (pitch moment) around the axis extending in the vehicle width direction of the frame member.

特開2003-137140号公報Japanese Unexamined Patent Publication No. 2003-137140

本発明はこのような課題に鑑みてなされたもので、上記フレーム部材の車両前後方向における、窪み部に相当する部位の曲げ剛性を高めることができる後部車体構造の提供を目的とする。 The present invention has been made in view of such a problem, and an object of the present invention is to provide a rear vehicle body structure capable of increasing the bending rigidity of a portion corresponding to a recessed portion in the vehicle front-rear direction of the frame member.

この発明は、車体後部に車両前後方向に延びる閉断面が内部に構成されたフレーム部材を有し、上記フレーム部材には、該フレーム部材の下面の車幅方向中央を上方に窪ませることにより、リヤサスペンションに備えたダンパが該フレーム部材の下方から挿入固定される窪み部が形成されており、上記フレーム部材の車両前後方向の上記窪み部に相当する窪み部相当位置にて、上記ダンパに対して車幅方向内外各側に上記閉断面を分岐する分岐状の閉断面を形成した後部車体構造であって、上記窪み部相当位置の上記ダンパに対して車幅方向の少なくとも一方に、上記分岐状の閉断面とは別に車両前後方向に延びる補強閉断面を構成する補強部材を備え、上記補強閉断面は、上記フレーム部材の車両前後方向における、上記窪み部相当位置を車両前後方向に通過するように連続して延びているものである。 INDUSTRIAL APPLICABILITY The present invention has a frame member having a closed cross section extending in the front-rear direction of the vehicle internally formed in the rear portion of the vehicle body, and the frame member is recessed upward at the center of the lower surface of the frame member in the vehicle width direction. A recessed portion is formed in which the damper provided in the rear suspension is inserted and fixed from below the frame member, and the damper is located at a position corresponding to the recessed portion in the vehicle front-rear direction of the frame member with respect to the damper. It is a rear vehicle body structure in which a branched closed cross section is formed on each side of the inside and outside of the vehicle width direction, and the branch is formed in at least one of the dampers in the vehicle width direction with respect to the damper at the position corresponding to the recess. In addition to the closed cross section of the shape, a reinforcing member constituting the reinforced closed cross section extending in the front-rear direction of the vehicle is provided , and the reinforced closed cross section passes through the position corresponding to the recessed portion in the front-rear direction of the frame member in the front-rear direction of the vehicle. It extends continuously like this.

上記構成によれば、補強部材により上記補強閉断面を設けることで、上記フレーム部材の車両前後方向における、窪み部相当位置を補強することができ、窪み部を形成することにより断面係数が低下した窪み部相当位置の車両前後方向(長手方向)の曲げ剛性を高めることができる。 According to the above configuration, by providing the reinforced closed cross section with the reinforcing member, it is possible to reinforce the position corresponding to the dent portion in the vehicle front-rear direction of the frame member, and the section coefficient is lowered by forming the dent portion. It is possible to increase the bending rigidity in the vehicle front-rear direction (longitudinal direction) at the position corresponding to the recess.

ここで、上記補強閉断面は、補強部材とフレーム部材との間に閉断面空間が構成されるように、例えば断面ハット状の補強部材をフレーム部材に接合した構成に限らず、内部に独立した閉断面空間を有する補強部材をフレーム部材に接合した構成も含むものとする。 Here, the reinforcing closed cross section is not limited to a configuration in which a reinforcing member having a cross-section hat shape is joined to the frame member so that a closed cross-section space is formed between the reinforcing member and the frame member, and is independent inside. It also includes a configuration in which a reinforcing member having a closed cross-sectional space is joined to a frame member.

しかも、上記補強閉断面は、上記フレーム部材の車両前後方向における、上記窪み部相当位置を車両前後方向に通過するように連続して延びたものであるから、補強閉断面によって、上記フレーム部材の車両前後方向における、上記窪み部相当位置に対して前後各側の周辺部分を含めて曲げ剛性を高めることができる。 Moreover, since the reinforced closed cross section is continuously extended so as to pass the position corresponding to the recessed portion in the vehicle front-rear direction of the frame member in the vehicle front-rear direction , the reinforced closed cross section of the frame member can be used. It is possible to increase the bending rigidity including the peripheral portions on each of the front and rear sides with respect to the position corresponding to the recessed portion in the front-rear direction of the vehicle.

この発明は、また、車体後部に車両前後方向に延びる閉断面が内部に構成されたフレーム部材を有し、上記フレーム部材には、該フレーム部材の下面の車幅方向中央を上方に窪ませることにより、リヤサスペンションに備えたダンパが該フレーム部材の下方から挿入固定される窪み部が形成されており、上記フレーム部材の車両前後方向の上記窪み部に相当する窪み部相当位置にて、上記ダンパに対して車幅方向内外各側に上記閉断面を分岐する分岐状の閉断面を形成した後部車体構造であって、上記窪み部相当位置の上記ダンパに対して車幅方向の少なくとも一方に、上記分岐状の閉断面とは別に車両前後方向に延びる補強閉断面を構成する補強部材を備え、上記フレーム部材に対して車幅方向外側に備えたリヤホイールハウスインナを補強するサイドブレースと、車体後部の両サイドに備えた上記フレーム部材を車幅方向に連結するリヤクロスメンバとを備え、上記補強部材は、内部に上記補強閉断面を構成する補強部材本体部を備えるとともに、車両上下方向に延びる上記サイドブレースの下端と、車幅方向に延びる上記リヤクロスメンバの車幅外端とを連結する、車幅方向に延びる連結メンバ部を備え、上記補強部材本体部と上記連結メンバ部とは結合されたものである。 The present invention also has a frame member having a closed cross section extending in the front-rear direction of the vehicle internally formed in the rear portion of the vehicle body, and the lower surface of the frame member is recessed upward in the center in the vehicle width direction. As a result, a recessed portion is formed in which the damper provided in the rear suspension is inserted and fixed from below the frame member, and the damper is located at a position corresponding to the recessed portion in the vehicle front-rear direction of the frame member. It is a rear vehicle body structure in which a branched closed cross section is formed on each side of the inside and outside of the vehicle width direction, and the damper is located at a position corresponding to the recessed portion in at least one of the vehicle width directions. In addition to the branch-shaped closed cross section, a reinforcing member that constitutes a reinforced closed cross section that extends in the front-rear direction of the vehicle is provided, and a side brace that reinforces the rear wheel house inner provided on the outside in the vehicle width direction with respect to the frame member, and a vehicle body. A rear cross member for connecting the frame members provided on both sides of the rear portion in the vehicle width direction is provided, and the reinforcing member includes a reinforcing member main body portion constituting the reinforcing closed cross section inside and in the vehicle vertical direction. A connecting member portion extending in the vehicle width direction for connecting the lower end of the extending side brace and the vehicle width outer end of the rear cross member extending in the vehicle width direction is provided, and the reinforcing member main body portion and the connecting member portion are It is a combination.

上記構成によれば、補強部材により上記補強閉断面を設けることで、上記フレーム部材の車両前後方向における、窪み部相当位置を補強することができ、窪み部を形成することにより断面係数が低下した窪み部相当位置の車両前後方向(長手方向)の曲げ剛性を高めることができる。According to the above configuration, by providing the reinforced closed cross section with the reinforcing member, it is possible to reinforce the position corresponding to the dent portion in the vehicle front-rear direction of the frame member, and the section coefficient is lowered by forming the dent portion. It is possible to increase the bending rigidity in the vehicle front-rear direction (longitudinal direction) at the position corresponding to the recess.

しかも、上記補強部材本体部を上記連結メンバ部に結合することで該補強部材本体部の強度を高めることができ、結果的にフレーム部材の長手方向の曲げ剛性をさらに高めることができる。 Moreover, by connecting the reinforcing member main body to the connecting member, the strength of the reinforcing member main body can be increased, and as a result, the bending rigidity of the frame member in the longitudinal direction can be further increased.

この発明の態様として、上記窪み部には、上記ダンパの上部を挿通するダンパ挿通孔が設けられており、上記補強閉断面は、上記窪み部相当位置の車幅方向における、上記ダンパ挿通孔を除く略全体に渡って設けられたものである。As an aspect of the present invention, the recessed portion is provided with a damper insertion hole through which the upper portion of the damper is inserted, and the reinforced closed cross section provides the damper insertion hole in the vehicle width direction at a position corresponding to the recessed portion. It is provided over almost the entire area except.

上記構成によれば、上記窪み部相当位置のダンパ挿通孔を除く車幅方向の略全体に渡って補強閉断面を構成できるため、窪み部を設けることで分岐状の閉断面が形成された上記窪み部相当位置を効果的に補強することができる。According to the above configuration, since it is possible to form a reinforced closed cross section over substantially the entire vehicle width direction excluding the damper insertion hole at the position corresponding to the recess, a branched closed cross section is formed by providing the recess. The position corresponding to the recess can be effectively reinforced.

この発明によれば、上記フレーム部材の車両前後方向における、窪み部に相当する部位の曲げ剛性を高めることができる。 According to the present invention, it is possible to increase the bending rigidity of the portion corresponding to the recessed portion in the vehicle front-rear direction of the frame member.

本実施形態の後部車体構造の斜視図。The perspective view of the rear body structure of this embodiment. 本実施形態の後部車体構造の底面図。Bottom view of the rear body structure of this embodiment. 本実施形態の後部車体構造の要部を車幅方向外側かつ底面側から見た斜視図。A perspective view of a main part of the rear body structure of the present embodiment as viewed from the outside in the vehicle width direction and from the bottom surface side. 図1の矢視Aから見た本実施形態の後部車体構造の要部拡大図。An enlarged view of a main part of the rear body structure of the present embodiment as seen from the arrow A of FIG. 図2中のA-A線拡大断面図。FIG. 2 is an enlarged cross-sectional view taken along the line AA in FIG. 図2中のB-B線拡大断面図。FIG. 2 is an enlarged sectional view taken along line BB in FIG. フロントサイドフレームの窪み部相当位置の上面を省略して示した内部構造を上方かつ車幅方向内側から視た構成説明図。A configuration explanatory view of the internal structure shown by omitting the upper surface of the position corresponding to the recessed portion of the front side frame as viewed from above and from the inside in the vehicle width direction. フロントサイドフレームの窪み部相当位置の図7に示す部位の分解斜視図。An exploded perspective view of a portion shown in FIG. 7 at a position corresponding to a recessed portion of the front side frame. 図1において、フロントサイドフレームの上面に対して補強部材を分離した状態を示す図1の要部対応図。FIG. 1 is a diagram corresponding to a main part of FIG. 1, showing a state in which a reinforcing member is separated from the upper surface of the front side frame. 図5中のC-C線矢視断面図。FIG. 5 is a cross-sectional view taken along the line CC in FIG. 本実施形態の補強部材の平面図(a)、本実施形態の補強部材の底面図(b)。A plan view (a) of the reinforcing member of the present embodiment and a bottom view (b) of the reinforcing member of the present embodiment. 他の実施形態の後部車体構造の図4対応図(a)、他の実施形態の後部車体構造の図1の要部対応図(b)。FIG. 4 correspondence diagram (a) of the rear body structure of another embodiment, and the main part correspondence diagram (b) of FIG. 1 of the rear body structure of another embodiment. 従来の後部車体構造の底面図。Bottom view of the conventional rear body structure. 図13中のD-D線拡大断面図。FIG. 13 is an enlarged cross-sectional view taken along the line DD in FIG.

以下、図面に基づいて本発明の実施形態を詳述する。
図中、矢印Fは車両前方を示し、矢印Rは車両右側を示し、矢印Lは車両左側を示し、矢印Uは車両上方を示すものとし、矢印outは車幅方向外側を示し、矢印inは車幅方向内側を示すものとする。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the figure, arrow F indicates the front of the vehicle, arrow R indicates the right side of the vehicle, arrow L indicates the left side of the vehicle, arrow U indicates the upper side of the vehicle, arrow out indicates the outside in the vehicle width direction, and arrow in indicates the outside in the vehicle width direction. It shall indicate the inside in the vehicle width direction.

図1、図2は、本発明の本実施形態の後部車体構造Vを示し、まず、本実施形態の後部車体構造Vの前提構造について主に図1、図2を用いて説明する。 1 and 2 show the rear body structure V of the present embodiment of the present invention, and first, the premise structure of the rear body structure V of the present embodiment will be described mainly with reference to FIGS. 1 and 2.

図2に示すように自動車の車体においては、車室の床面を形成するフロアパネル1を設け、このフロアパネル1の両サイドには、サイドシルインナ2aとサイドシルアウタ(図示省略)とを備えて車両前後方向に延びる閉断面2sが構成される車体強度部材としてのサイドシル2を接合固定している。 As shown in FIG. 2, in the vehicle body of an automobile, a floor panel 1 forming the floor surface of the passenger compartment is provided, and side sill inners 2a and side sill outers (not shown) are provided on both sides of the floor panel 1. The side sill 2 as a vehicle body strength member having a closed cross section 2s extending in the front-rear direction of the vehicle is joined and fixed.

図1、図2に示すように、上述のフロアパネル1の後部には、上方に立ち上がるキックアップ部3を介して車体後部フロアを構成するリヤフロアパネル4を一体的に連設しており、該リヤフロアパネル4の両サイドには、車両前後方向に延びるリヤサイドフレーム6(以下、「フレーム部材6」と称する)が設けられている。 As shown in FIGS. 1 and 2, a rear floor panel 4 constituting the rear floor of the vehicle body is integrally connected to the rear portion of the floor panel 1 described above via a kick-up portion 3 rising upward. Rear side frames 6 (hereinafter referred to as "frame members 6") extending in the front-rear direction of the vehicle are provided on both sides of the rear floor panel 4.

図2に示すように、リヤフロアパネル4の前部4F(以下、「リヤフロア前部4F」と称する)には、下方に燃料タンク5が配置されている。この燃料タンク5は図示しないインシュレータで保護されている。 As shown in FIG. 2, a fuel tank 5 is arranged below the front portion 4F of the rear floor panel 4 (hereinafter, referred to as “rear floor front portion 4F”). The fuel tank 5 is protected by an insulator (not shown).

同図に示すように、燃料タンク5には、車体後部の左側面に設けられたフィラーリッド内部(図示省略)の燃料供給口(図示省略)から燃料タンク5へ燃料を給油するための燃料パイプ5a(フィラーパイプ5a)や蒸発燃料の通路となるブリーザパイプ5bがリヤフロアパネル4の下方から車両左側のフレーム部材6を横切るようにして車両左側に配管されている。 As shown in the figure, the fuel tank 5 has a fuel pipe for refueling the fuel tank 5 from a fuel supply port (not shown) inside the filler lid (not shown) provided on the left side surface of the rear part of the vehicle body. The breather pipe 5a (filler pipe 5a) and the breather pipe 5b serving as a passage for the evaporated fuel are piped to the left side of the vehicle so as to cross the frame member 6 on the left side of the vehicle from below the rear floor panel 4.

図1に示すように、リヤフロアパネル4の後部4R(以下、「リヤフロア後部4R」と称する)には、その車幅方向中間部に下方に窪むスペアタイヤパン又は他の部品を兼ねる凹部4aが一体形成されている。 As shown in FIG. 1, the rear 4R of the rear floor panel 4 (hereinafter referred to as “rear floor rear 4R”) has a recess 4a that also serves as a spare tire pan or other parts that is recessed downward in the middle portion in the vehicle width direction. It is integrally formed.

上述したフレーム部材6は、キックアップ部3からリヤフロアパネル4の後端まで内部に車両前後方向に延びる閉断面6sが形成された車体側部剛性部材として構成しており、前端がサイドシル2の後部に接続されている。 The frame member 6 described above is configured as a vehicle body side rigid member having a closed cross section 6s formed inside from the kick-up portion 3 to the rear end of the rear floor panel 4 in the vehicle front-rear direction, and the front end is the rear portion of the side sill 2. It is connected to the.

図1、図2に示すように、フレーム部材6は、車両前後方向全体に渡って上方へ凸の断面ハット形状のフレーム部材アッパ61(図1参照)と、下方へ凸の断面ハット形状のフレーム部材ロア62(図2参照)等を備えている。これらフレーム部材アッパ61とフレーム部材ロア62とは、夫々の車幅方向内端にフランジ部61a,62aが形成されており(図5、図6参照)、これらフランジ部61a,62aによってリヤフロアパネル4の車幅方向外側端部4bを挟み込んだ状態で溶接にて3重接合されている(同図参照)。 As shown in FIGS. 1 and 2, the frame member 6 includes a frame member upper 61 (see FIG. 1) having a cross-section hat shape that is convex upward in the entire front-rear direction of the vehicle, and a frame having a cross-section hat shape that is convex downward. A member lower 62 (see FIG. 2) and the like are provided. Flange portions 61a and 62a are formed at the inner ends of the frame member upper 61 and the frame member lower 62 in the vehicle width direction (see FIGS. 5 and 6), and the rear floor panel 4 is formed by the flange portions 61a and 62a. The outer end portion 4b in the vehicle width direction is sandwiched and triple-bonded by welding (see the figure).

図1、図2に示すように、フレーム部材6の車幅方向外側には、リヤホイールハウス7が設けられている。リヤホイールハウス7は、不図示のリヤホイールハウスアウタとリヤホイールハウスインナ7a(以下、「ホイールハウスインナ7a」と称する)とを接合して構成されている。 As shown in FIGS. 1 and 2, a rear wheel house 7 is provided on the outer side of the frame member 6 in the vehicle width direction. The rear wheel house 7 is configured by joining a rear wheel house outer (not shown) and a rear wheel house inner 7a (hereinafter referred to as “wheel house inner 7a”).

図1に示すように、ホイールハウスインナ7aには、該ホイールハウスインナ7aを補強する前後各側のサイドブレース8,9が車幅方向内面側から接合されている。これら前後各側のサイドブレース8,9とホイールハウスインナ7aとの間には閉断面8s,9sが夫々形成されている。 As shown in FIG. 1, side braces 8 and 9 on the front and rear sides for reinforcing the wheel house inner 7a are joined to the wheel house inner 7a from the inner surface side in the vehicle width direction. Closed cross sections 8s and 9s are formed between the side braces 8 and 9 on each of the front and rear sides and the wheel house inner 7a, respectively.

同図に示すように、前後両側のサイドブレース8,9は、夫々車両側面視アーチ状に形成したホイールハウスインナ7aのアーチ部71における頂部71aに対して前後各側部位に配設されており、共にホイールハウスインナ7aの縦壁部72の上下方向中間位置から上方へと延びている。 As shown in the figure, the side braces 8 and 9 on both the front and rear sides are arranged on the front and rear side portions with respect to the top portion 71a of the arch portion 71 of the wheel house inner 7a formed in the shape of a vehicle side view arch. Both extend upward from the vertical intermediate position of the vertical wall portion 72 of the wheel house inner 7a.

また図1、図2に示すように、リヤフロア前部4Fとリヤフロア後部4Rとの境界部においてリヤフロアパネル4の上下両部には、リヤクロスメンバアッパ11(図1参照)とリヤクロスメンバロア12(図2参照)とをスポット溶接等により夫々接合固定している。これら両者11,12は何れも車幅方向に延びて両サイドのフレーム部材6を車幅方向に連結するリヤクロスメンバ(いわゆるNo.4クロスメンバ)であって、リヤクロスメンバアッパ11とリヤフロアパネル4との間、並びにリヤクロスメンバロア12とリヤフロアパネル4との間には、上下方向にオーバーラップする閉断面11s,12sが形成されている。 Further , as shown in FIGS. 1 and 2, at the boundary between the rear floor front portion 4F and the rear floor rear portion 4R, the rear cross member upper 11 (see FIG. 1) and the rear cross member lower are provided on both the upper and lower portions of the rear floor panel 4. 12 (see FIG. 2) is joined and fixed by spot welding or the like. Both 11 and 12 are rear cross members (so-called No. 4 cross members) that extend in the vehicle width direction and connect the frame members 6 on both sides in the vehicle width direction, and are the rear cross member upper 11 and the rear floor panel. Closed cross sections 11s and 12s that overlap in the vertical direction are formed between the rear cross member lower 12 and the rear floor panel 4 and between the rear cross member lower 12 and the rear floor panel 4.

さらに図2に示すように、リヤフロア後部4Rには、リヤフロア後部4Rの凹部4aを横切るように車幅方向に延びて両サイドのフレーム部材6を車幅方向に連結する後側リヤクロスメンバ13(いわゆるNo.5クロスメンバ)をリヤフロア後部4Rの下面側から接合固定している。これら後側リヤクロスメンバ13とリヤフロアパネル4との間には車幅方向に延びる閉断面13sが形成されている。 Further , as shown in FIG. 2, the rear rear cross member 13 extends in the vehicle width direction so as to cross the recess 4a of the rear floor rear 4R and connects the frame members 6 on both sides in the vehicle width direction to the rear floor rear portion 4R. (So-called No. 5 cross member) is joined and fixed from the lower surface side of the rear floor rear portion 4R. A closed cross section 13s extending in the vehicle width direction is formed between the rear rear cross member 13 and the rear floor panel 4.

続いて本実施形態の後部車体構造Vの詳細について説明する。
なお、本実施形態の後部車体構造Vは、左右対称であるため、図1、図2に加えて図3~図7を用いて車体左側の構成に基づいて説明する。
Subsequently, the details of the rear body structure V of the present embodiment will be described.
Since the rear vehicle body structure V of the present embodiment is symmetrical, it will be described based on the configuration on the left side of the vehicle body by using FIGS. 3 to 7 in addition to FIGS. 1 and 2.

図2に示すように、本実施形態のフレーム部材6は、その車両前後方向の中間位置(不図示のリヤサスペンションに対応する位置)に、サスペンション部品取付部14,(15),16が設けられている。 As shown in FIG. 2, the frame member 6 of the present embodiment is provided with suspension component mounting portions 14, (15), 16 at an intermediate position in the vehicle front-rear direction (position corresponding to a rear suspension (not shown)). ing.

図2、図3に示すように、サスペンション部品取付部14,(15),16は、フレーム部材6の車両前後方向の中間位置において、車両前後方向に沿って、前側サスペンション部品取付部14、ダンパ支持部(15)、後側サスペンション部品取付部16を備えている。 As shown in FIGS. 2 and 3, the suspension component mounting portions 14, (15) and 16 are located at the intermediate position of the frame member 6 in the vehicle front-rear direction, along the vehicle front-rear direction, with the front suspension component mounting portion 14 and the damper. It includes a support portion (15) and a rear suspension component mounting portion 16.

前側サスペンション部品取付部14は、フレーム部材6の車両前後方向の中間位置の前側位置に、例えば、不図示のサスペンションクロスメンバやトレーリングアーム等のリヤサスペンション部品をサスペンション装着用ボルト(図示省略)を介して取り付け支持可能にボルト挿通孔14aを有して台座状に下方へ迫り出して形成される。 The front suspension component mounting portion 14 has a suspension mounting bolt (not shown) for rear suspension components such as a suspension cross member and a trailing arm (not shown) at a front position of the frame member 6 at an intermediate position in the vehicle front-rear direction. It has a bolt insertion hole 14a so that it can be mounted and supported via the pedestal, and is formed so as to protrude downward in a pedestal shape.

後側サスペンション部品取付部16は、フレーム部材6の車両前後方向の前側サスペンション部品取付部14より後側位置に、例えば、サスペンションクロスメンバ等のリヤサスペンション部品をサスペンション装着用ボルト(図示省略)を介して取り付け支持可能にボルト挿通孔16aを有して台座状に下方へ迫り出して形成される。 The rear suspension component mounting portion 16 is located at a position rearward from the front suspension component mounting portion 14 in the vehicle front-rear direction of the frame member 6, for example, a rear suspension component such as a suspension cross member is attached via a suspension mounting bolt (not shown). It has a bolt insertion hole 16a so that it can be mounted and supported, and is formed so as to protrude downward in a pedestal shape.

上述したリヤクロスメンバ11,12は、両サイドのフレーム部材6の車両前後方向の前側サスペンション部品取付部14に相当する位置にて車幅方向内側から接合されるとともに(図2、図3参照)、上述した後側リヤクロスメンバ13は、両サイドのフレーム部材6の車両前後方向の後側サスペンション部品取付部16に相当する位置にて車幅方向内側から接合されている(同図参照)。 The rear cross members 11 and 12 described above are joined from the inside in the vehicle width direction at positions corresponding to the front suspension component mounting portions 14 in the vehicle front-rear direction of the frame members 6 on both sides (see FIGS. 2 and 3). The rear rear cross member 13 described above is joined from the inside in the vehicle width direction at a position corresponding to the rear suspension component mounting portion 16 in the vehicle front-rear direction of the frame members 6 on both sides (see the figure).

一方図2、図3、図5に示すように、フレーム部材6の前後各側のサスペンション部品取付部14,16の間、換言するとフレーム部材6の車両前後方向のホイールハウスインナ7aの車両前後方向の中間位置(頂部71a(図3参照)に相当する位置)において、フレーム部材6の下面の車幅方向中央を上方に窪ませた窪み部15が形成されている。
なお、図5は、図2中のA-A線断面図を示し、詳しくはフレーム部材6の車両前後方向の窪み部相当位置Pにおける直交断面を示す。
On the other hand , as shown in FIGS. 2, 3 and 5, between the suspension component mounting portions 14 and 16 on the front and rear sides of the frame member 6, in other words, the vehicle of the wheel house inner 7a in the vehicle front-rear direction of the frame member 6. At an intermediate position in the front-rear direction (a position corresponding to the top portion 71a (see FIG. 3)), a recessed portion 15 is formed in which the center of the lower surface of the frame member 6 in the vehicle width direction is recessed upward.
Note that FIG. 5 shows a sectional view taken along line AA in FIG. 2, and more specifically, shows an orthogonal sectional view of the frame member 6 at a recessed portion corresponding position P in the vehicle front-rear direction.

この窪み部15は、フレーム部材6の下面の車幅方向中央部に上下方向に向けて開口する開口部15aを備えており(図5参照)、その開口部15aから不図示のリヤサスペンションに備えたダンパD(図5参照)を挿入して固定する上記ダンパ支持部(15)として形成されている。 The recess 15 is provided with an opening 15a that opens in the vertical direction at the center of the lower surface of the frame member 6 in the vehicle width direction (see FIG. 5), and is provided for a rear suspension (not shown) from the opening 15a. It is formed as the damper support portion (15) for inserting and fixing the damper D (see FIG. 5).

すなわち、図2に示すように、本実施形態のダンパ支持部(15)は、フレーム部材6に窪み部15を設けることによって構成されており、フレーム部材6に窪み部15を設けることによって該フレーム部材6の車両前後方向の該窪み部15に相当する位置P(窪み部相当位置P)は、他の部位と比較して車幅方向外側に幅広となる幅広部6Aを形成している(図2、図3参照)。 That is, as shown in FIG. 2, the damper support portion (15) of the present embodiment is configured by providing the recessed portion 15 in the frame member 6, and by providing the recessed portion 15 in the frame member 6, the frame is provided. The position P (recessed portion corresponding position P) corresponding to the recessed portion 15 in the vehicle front-rear direction of the member 6 forms a wide portion 6A that is wider outside in the vehicle width direction as compared with other portions (FIG. 2. See Fig. 3).

これにより図5に示すように、フレーム部材6の車両前後方向に延びる閉断面6sは、該フレーム部材6の車両前後方向の窪み部相当位置Pにて窪み部15に挿入固定されたダンパDに対して車幅方向内側の閉断面6sa(車幅内側閉断面6sa)と、車幅方向外側の閉断面6sb(車幅外側閉断面6sb)とで二股状に形成される。 As a result , as shown in FIG. 5, the closed cross section 6s of the frame member 6 extending in the vehicle front-rear direction is inserted and fixed in the recess 15 at the position P corresponding to the recess in the vehicle front-rear direction of the frame member 6. On the other hand, the closed cross section 6sa inside the vehicle width direction (closed cross section 6sa inside the vehicle width) and the closed cross section 6sb outside the vehicle width direction 6sb (closed cross section outside the vehicle width 6sb) form a bifurcated shape.

このため、図2に示すように、後突時にフレーム部材6の窪み部相当位置Pを通過して車両前方へ伝達される後突荷重のロードパスは、窪み部相当位置Pにおいて車幅内側閉断面6saと車幅外側閉断面6sbとの夫々に対応する2つのロードパスL1,L2が構成されることになる。 Therefore, as shown in FIG. 2, the load path of the rear collision load that passes through the recessed portion corresponding position P of the frame member 6 and is transmitted to the front of the vehicle at the time of the rear collision is closed inside the vehicle width at the recessed portion equivalent position P. Two load paths L1 and L2 corresponding to each of the cross section 6sa and the vehicle width outer closed cross section 6sb are configured.

また本実施形態の後部車体構造Vにおいては、上述したように、フレーム部材6にダンパ支持機能を持たせるために、上述したように、該フレーム部材6に窪み部15を設けたものである。 Further , in the rear body structure V of the present embodiment, as described above, in order to give the frame member 6 a damper support function, the frame member 6 is provided with a recessed portion 15. ..

これに伴って、車体後部の両サイドにおいて、フレーム部材6は、従来のように、フレーム部材とダンパ支持部とホイールハウスインナとを車幅方向の内側から外側に別々に配設した構成(例えば、図13参照)と比して全体的に(すなわち車両前後方向に平行に延びる部分を)、車幅方向内側へオフセットした位置に配設される。 Along with this, on both sides of the rear part of the vehicle body, the frame member 6 has a configuration in which the frame member, the damper support portion, and the wheel house inner are separately arranged from the inside to the outside in the vehicle width direction (for example, as in the conventional case). , (See FIG. 13), as a whole (that is, the portion extending parallel to the vehicle front-rear direction) is arranged at a position offset inward in the vehicle width direction.

つまり、本実施形態においては、フレーム部材6は、その長手方向(車両前後方向)に沿った軸心6x(図2参照)が上述した従来の構成と比して車幅方向内側に寄せさせた位置に配設されるため、これに起因してサイドシル2に対する車幅方向内側へのオフセット量も従来の構成と比して大きく設定される。 That is, in the present embodiment, the frame member 6 has an axial center 6x (see FIG. 2) along its longitudinal direction (vehicle front-rear direction) moved inward in the vehicle width direction as compared with the conventional configuration described above. Since it is arranged at the position, the amount of offset inward in the vehicle width direction with respect to the side sill 2 is also set to be larger than that of the conventional configuration.

そして図2、図3に示すように、本実施形態のフレーム部材6は、その車両前後方向の前部を除く部位が車両前後方向と略平行に延びているのに対して、該フレーム部材6の前部は前方ほど車幅方向外側に位置するよう斜め方向に延びる傾斜部6Fを形成しており、この傾斜部6Fの前端(つまりフレーム部材6の前端)は、サイドシル2の後部に接合されている(同図参照)。 As shown in FIGS. 2 and 3, the frame member 6 of the present embodiment has a portion excluding the front portion in the vehicle front-rear direction extending substantially parallel to the vehicle front-rear direction. The front portion of 6 forms an inclined portion 6F extending in an oblique direction so as to be located outward in the vehicle width direction toward the front, and the front end of the inclined portion 6F (that is, the front end of the frame member 6) is joined to the rear portion of the side sill 2. (See the figure).

このように、フレーム部材6の前部に傾斜部6Fを形成したうえで前端をサイドシル2に接続することで、上述したように、フレーム部材6に窪み部15を設けることに起因してフレーム部材6がサイドシル2に対して車幅方向内側へオフセットした位置に配設された本実施形態のような構成においても、フレーム部材6の前端をサイドシル2の後部に滑らかに接続することができるため、後突時に該フレーム部材6からサイドシル2へ後突荷重を効率よく伝達することが可能となる。 As described above, by forming the inclined portion 6F on the front portion of the frame member 6 and connecting the front end to the side sill 2, the frame member is provided with the recessed portion 15 as described above. Even in the configuration as in the present embodiment in which the 6 is arranged at a position offset inward in the vehicle width direction with respect to the side sill 2, the front end of the frame member 6 can be smoothly connected to the rear portion of the side sill 2. At the time of rear collision, the rear collision load can be efficiently transmitted from the frame member 6 to the side sill 2.

なお、本実施形態では傾斜部6Fは、フレーム部材6の車両前後方向の窪み部相当位置Pと前側サスペンション部品取付部14との間の位置(換言すると幅広部6Aの前端相当位置)から該フレーム部材6の前端にかけての部分に相当する。 In the present embodiment, the inclined portion 6F is located from the position between the recessed portion corresponding position P in the vehicle front-rear direction of the frame member 6 and the front suspension component mounting portion 14 (in other words, the position corresponding to the front end of the wide portion 6A). It corresponds to the portion extending to the front end of the frame member 6.

また図2、図3に示すように、傾斜部6Fの前部は、サイドシルインナ2aの後部、すなわち、該サイドシルインナ2aの後端からキックアップ部3の後方手前まで車両前後方向のオーバーラップしている。このオーバーラップ部分において、傾斜部6Fの前部は、サイドシルインナ2aの後部に車幅方向内側から接合されている。 Further , as shown in FIGS. 2 and 3, the front portion of the inclined portion 6F overlaps the rear portion of the side sill inner 2a, that is, from the rear end of the side sill inner 2a to the rear front of the kick-up portion 3 in the vehicle front-rear direction. is doing. In this overlapping portion, the front portion of the inclined portion 6F is joined to the rear portion of the side silina 2a from the inside in the vehicle width direction.

さらに本実施形態のフレーム部材6は、上述したように、ダンパ支持部(15)としての窪み部15を設けることに起因して窪み部相当位置Pに幅広部6Aを設けたが、特にこの幅広部6Aは、車幅方向外側に拡幅して形成したものである(同図参照)。 Further , as described above, the frame member 6 of the present embodiment is provided with the wide portion 6A at the position corresponding to the recess portion P due to the provision of the recess portion 15 as the damper support portion (15) . The wide portion 6A is formed by widening outward in the vehicle width direction (see the figure).

フレーム部材6は、窪み部相当位置P(幅広部6A)において、幅広部6Aを形成しない場合と比して車幅方向外側(車幅方向におけるサイドシル2の側)へ軸心6x(図2参照)を寄せることができ、結果的にフレーム部材6に窪み部15を設けることによる弊害を是正することができる。 The frame member 6 has an axial center 6x (see FIG. 2) at the recessed portion equivalent position P (wide portion 6A) toward the outside in the vehicle width direction (the side of the side sill 2 in the vehicle width direction) as compared with the case where the wide portion 6A is not formed. ), And as a result, the harmful effects of providing the recessed portion 15 in the frame member 6 can be corrected.

具体的には、フレーム部材6に窪み部15を設けることにより、該フレーム部材6がサイドシル2に対して車幅方向内側へのオフセット量が大きくなることで、後突時に、フレーム部材6からサイドシル2への後突荷重のスムーズな伝達が阻害され、フレーム部材6の前部とサイドシル2の後部との車両前後方向の重複量(オーバーラップ量)が大きくなるように、すなわち、フレーム部材とサイドシル部材とが平面視でZ字状になるように変形するおそれがあるという弊害を抑制することができる。 Specifically, by providing the recessed portion 15 in the frame member 6, the amount of offset of the frame member 6 inward in the vehicle width direction with respect to the side sill 2 becomes large, so that the side sill from the frame member 6 at the time of rear collision. Smooth transmission of the rear collision load to 2 is hindered, and the amount of overlap (overlap amount) between the front portion of the frame member 6 and the rear portion of the side sill 2 in the vehicle front-rear direction becomes large, that is, the frame member and the side sill. It is possible to suppress the adverse effect that the member may be deformed so as to have a Z shape in a plan view.

上述した幅広部6Aについて詳述すると、幅広部6Aは、フレーム部材6の後側サスペンション部品取付部16よりも後方位置から前側サスペンション部品取付部14の後側直近位置にかけて、窪み部相当位置Pが最も車幅方向外側へ幅広となるようにフレーム部材6の車幅方向外縁辺6oを車幅方向外側へ緩やかに拡幅して形成している(図2参照)。 Explaining the above-mentioned wide portion 6A in detail, the wide portion 6A has a recessed portion corresponding position P from a position behind the rear suspension component mounting portion 16 of the frame member 6 to a position close to the rear side of the front suspension component mounting portion 14. The outer edge 6o of the frame member 6 in the vehicle width direction is gently widened outward in the vehicle width direction so as to be widest outward in the vehicle width direction (see FIG. 2).

一方、フレーム部材6の車幅方向内縁辺6iは、車両前後方向における、幅広部6A、すなわち窪み部相当位置Pを含めて車幅方向内側へ拡幅せずに該フレーム部材6の後端からリヤクロスメンバロア12との接合部にかけて、車両前後方向に沿って略直線状に形成されている(図2参照)。 On the other hand, the inner edge 6i in the vehicle width direction of the frame member 6 does not widen inward in the vehicle width direction including the wide portion 6A, that is, the position P corresponding to the recessed portion in the vehicle front-rear direction, from the rear end of the frame member 6. It is formed in a substantially straight line along the front-rear direction of the vehicle toward the joint with the rear cross member lower 12 (see FIG. 2).

すなわち、幅広部6Aは、フレーム部材6の車幅方向外縁辺6oのみを車両前後方向の窪み部相当位置Pを中心としてホイールハウスインナ7aに向けて迫り出すように膨出することによって形成している。そして窪み部15は、底面視で長軸が車両前後方向に一致する楕円形状に形成しており、その軸心65aa(図5参照)は、フレーム部材6の幅広に形成した幅広部6A(窪み部相当位置P)の車幅方向中央部に設けたものである。 That is, the wide portion 6A is formed by bulging only the outer edge 6o of the frame member 6 in the vehicle width direction so as to protrude toward the wheel house inner 7a centering on the recessed portion corresponding position P in the vehicle front-rear direction. There is. The recessed portion 15 is formed in an elliptical shape in which the long axis coincides with the vehicle front-rear direction when viewed from the bottom surface, and the axial center 65aa (see FIG. 5) is a wide portion 6A (see FIG. 5) formed to be wide of the frame member 6. It is provided in the central portion in the vehicle width direction of the recessed portion corresponding position P).

これにより図2に示すように、後突時にフレーム部材6の窪み部相当位置Pを通過するロードパスL1,L2のうち、車幅外側閉断面6sbを通過する後突荷重のロードパスL2は、フレーム部材6の窪み部相当位置Pにおいて車幅方向外側へ窪み部15を迂回するように前方へ伝達する一方で、車幅内側閉断面6saを通過する後突荷重のロードパスL1は、窪み部相当位置Pにおいて車幅方向内側へ窪み部15を迂回することなく該フレーム部材6の長手方向(車両前後方向)に沿って直線状に前方に伝達される。 As a result , as shown in FIG. 2, of the load paths L1 and L2 that pass through the recessed portion corresponding position P of the frame member 6 at the time of rear collision, the load path L2 of the rear collision load that passes through the vehicle width outer closed cross section 6sb becomes At the position P corresponding to the recessed portion of the frame member 6, the load path L1 of the rear collision load passing through the vehicle width inner closed cross section 6sa is transmitted forward so as to bypass the recessed portion 15 outward in the vehicle width direction. At the portion corresponding position P, the frame member 6 is linearly transmitted forward along the longitudinal direction (vehicle front-rear direction) of the frame member 6 without bypassing the recessed portion 15 inward in the vehicle width direction.

また図2、図3、図6に示すように、フレーム部材6の下面部における、窪み部相当位置Pよりも前方部分には、フレーム部材6の長手方向(車両前後方向)に連続して延びる稜線17が形成されている。 Further , as shown in FIGS. 2, 3 and 6, in the lower surface portion of the frame member 6 in front of the recessed portion corresponding position P, the frame member 6 is continuously in the longitudinal direction (vehicle front-rear direction). An extending ridge line 17 is formed.

図2、図3に示すように、この稜線17は、フレーム部材6の車両前後方向のおける窪み部15の前下端(窪み部15の下方に有する開口部15aの前端)からリヤクロスメンバロア12に相当する位置を越えるまで前方にへ延びている。 As shown in FIGS. 2 and 3, the ridge line 17 is a rear cross member lower 12 from the front lower end of the recessed portion 15 in the vehicle front-rear direction of the frame member 6 (the front end of the opening portion 15a held below the recessed portion 15). It extends forward until it exceeds the position corresponding to.

より詳しくは、稜線17は、フレーム部材6の車両前後方向おける窪み部15の前下端からリヤクロスメンバロア12の車幅方向に沿って延びる軸心12x(図2参照)に相当する位置よりも前方へ延びている。 More specifically, the ridge line 17 is from a position corresponding to an axial center 12x (see FIG. 2) extending from the front lower end of the recessed portion 15 in the vehicle front-rear direction of the frame member 6 along the vehicle width direction of the rear cross member lower 12. Also extends forward.

さらに図2に示すように、稜線17の前部(幅広部6Aの前端相当位置よりも前側部分)は、フレーム部材6の前部(傾斜部6F)の傾斜形状に応じて前方ほど車幅方向外側へ前側サスペンション部品取付部14の車幅方向外縁に沿って延び、サイドシルインナ2aに達する手にて前端がフレーム部材6の車幅方向外縁辺6oへ合流している。 Further , as shown in FIG. 2, the front portion of the ridge line 17 (the portion in front of the position corresponding to the front end of the wide portion 6A) has a vehicle width toward the front according to the inclined shape of the front portion (inclined portion 6F) of the frame member 6. It extends outward in the direction along the outer edge of the front suspension component mounting portion 14 in the vehicle width direction, and the front end of the front end joins the outer edge 6o of the frame member 6 in the vehicle width direction before reaching the side sill inner 2a.

図2、図3、図6に示すように、フレーム部材6の下面に稜線17を設けることによって、フレーム部材6の車両前後方向の窪み部相当位置Pの前側部位の車幅方向外側下部コーナー部には、車幅方向内側上方に向けて凹んだ凹部18が形成されている。この凹部18によってフレーム部材6の稜線17に対して車幅方向外側下方には、凹状空間18sを形成することができる。 As shown in FIGS. 2, 3, and 6, by providing the ridge line 17 on the lower surface of the frame member 6, the lower corner portion in the vehicle width direction of the front portion of the recess portion corresponding position P in the vehicle front-rear direction of the frame member 6. Is formed with a recess 18 recessed inward and upward in the vehicle width direction. The concave portion 18 can form a concave space 18s below the outer side in the vehicle width direction with respect to the ridge line 17 of the frame member 6.

換言すると図2、図3に示すように、フレーム部材6の下面に稜線17を設けることによって、フレーム部材6の下部は、稜線17に対して車幅方向内側部分が車幅方向外側部分(凹部18)に対して下方へ突出するように車両前後方向の直交断面が段状に形成されており、車幅方向における稜線17に相当する位置には上下方向に延びる段差面18aが稜線17に沿って形成される。 In other words , as shown in FIGS. 2 and 3, by providing the ridge line 17 on the lower surface of the frame member 6, the lower portion of the frame member 6 has the inner portion in the vehicle width direction with respect to the ridge line 17 and the outer portion in the vehicle width direction ( An orthogonal cross section in the vehicle front-rear direction is formed in a stepped manner so as to project downward with respect to the recess 18), and a stepped surface 18a extending in the vertical direction is formed on the ridge line 17 at a position corresponding to the ridge line 17 in the vehicle width direction. Formed along.

ここで図3、図6に示すように、フレーム部材6の下面における、稜線17に対して車幅方向内側部分を下方突出部19とすると、該下方突出部19には、該下方突出部19を横切るように車幅方向に沿って配索したブリーザパイプ5bを挿通するためのパイプ挿通部19aが設けられている。 Here , as shown in FIGS. 3 and 6, assuming that the inner portion of the lower surface of the frame member 6 in the vehicle width direction with respect to the ridge line 17 is a downward projecting portion 19, the downward projecting portion 19 has the downward projecting portion. A pipe insertion portion 19a for inserting a breather pipe 5b arranged along the vehicle width direction so as to cross 19 is provided.

これにより、燃料タンク5から延出される燃料パイプ5aとブリーザパイプ5bは、共にフレーム部材6を横切るように車幅方向内側から外側へ配索されるが、燃料パイプ5aはフレーム部材6の傾斜部6Fの下方を横切るように配索されるのに対して(図2参照)、ブリーザパイプ5bは、パイプ挿通部19aに挿通した状態でフレーム部材6の下方突出部19を横切るように配索される(図2、図6参照)。 As a result, the fuel pipe 5a and the breather pipe 5b extending from the fuel tank 5 are arranged from the inside to the outside in the vehicle width direction so as to cross the frame member 6, but the fuel pipe 5a is an inclined portion of the frame member 6. While the breather pipe 5b is routed so as to cross the lower part of the 6F (see FIG. 2), the breather pipe 5b is routed so as to cross the downward projecting portion 19 of the frame member 6 while being inserted into the pipe insertion portion 19a. (See FIGS. 2 and 6).

なお、本実施形態では、ブリーザパイプ5bのみをパイプ挿通部19aに挿通した状態でフレーム部材6の下方突出部19を横切るように配索したが、本発明はこの構成に限らず、図示省略するがフレーム部材6の下方突出部19に、燃料パイプ5aや他のパイプを挿通可能なパイプ挿通部を設けた構成も排除しない。 In the present embodiment, only the breather pipe 5b is arranged so as to cross the downward projecting portion 19 of the frame member 6 in a state of being inserted into the pipe insertion portion 19a, but the present invention is not limited to this configuration and is not shown. However, the configuration in which the downward projecting portion 19 of the frame member 6 is provided with a pipe insertion portion through which the fuel pipe 5a and other pipes can be inserted is not excluded.

上述したようにブリーザパイプ5bは、フレーム部材6の下方突出部19に設けたパイプ挿通部19aに車幅方向内側から挿通して該フレーム部材6の車幅方向外側へ延出されるが、このブリーザパイプ5bの延出部分を、フレーム部材6の車幅方向外側下部に位置する凹状空間18sに配置することができる。 As described above , the breather pipe 5b is inserted into the pipe insertion portion 19a provided in the downward projecting portion 19 of the frame member 6 from the inside in the vehicle width direction and extends outward in the vehicle width direction of the frame member 6. The extending portion of the breather pipe 5b can be arranged in the concave space 18s located at the lower outer side in the vehicle width direction of the frame member 6.

すなわち、凹部18によって形成される凹状空間18sに、ブリーザパイプ5bにおける、フレーム部材6(下方突出部19)に対して車幅方向外側への延出部分を配置することで、該延出部分のレイアウト性(取り回し性)を高めることができる。 That is, by arranging an extending portion of the breather pipe 5b to the outside in the vehicle width direction with respect to the frame member 6 (downward protruding portion 19) in the concave space 18s formed by the concave portion 18, the extending portion of the extending portion is provided. Layout (manageability) can be improved.

よって、ブリーザパイプ5bを、パイプ挿通部19aに挿通することでフレーム部材6(下方突出部19)によって保持しつつ、凹状空間18sによってブリーザパイプ5bにおける、下方突出部19に対して車幅方向外側への延出部分がフレーム部材6に対して車幅方向外側に密接して又は直近に設けられたホイールハウスインナ7aと干渉することなく、該延出部分のレイアウト性(取り回し性)を高めることができる。 Therefore, while the breather pipe 5b is inserted into the pipe insertion portion 19a and held by the frame member 6 (downward protruding portion 19), the concave space 18s allows the breather pipe 5b to be outside the vehicle width direction with respect to the downward protruding portion 19. To improve the layout (maneuverability) of the extended portion so that the extended portion does not interfere with the wheel house inner 7a provided in close contact with or closest to the frame member 6 on the outer side in the vehicle width direction. Can be done.

また図2に示すように、フレーム部材6は車両前後方向において複数の構成部材6a,6b,6m,6cを接続して一体に構成されており、特に、フレーム部材6の車両前後方向の窪み部相当位置Pにおいて、フレーム部材アッパ61は中間部材61mによって構成されるとともにフレーム部材ロア62は中間部材62mによって構成されている。 Further , as shown in FIG. 2, the frame member 6 is integrally configured by connecting a plurality of constituent members 6a, 6b, 6m, 6c in the vehicle front-rear direction, and in particular, a recess of the frame member 6 in the vehicle front-rear direction. At the portion corresponding position P, the frame member upper 61 is composed of the intermediate member 61m , and the frame member lower 62 is composed of the intermediate member 62m.

ここで図7は、フレーム部材アッパ61の中間部材61mを取り外してフレーム部材6の車両前後方向の窪み部相当位置Pを車幅方向外側上方から視た斜視図である。図8はフレーム部材6の窪み部15の分解図を示す。 Here , FIG. 7 is a perspective view in which the intermediate member 61m of the frame member upper 61 is removed and the position P corresponding to the recessed portion in the vehicle front-rear direction of the frame member 6 is viewed from the outside and upper side in the vehicle width direction. FIG. 8 shows an exploded view of the recessed portion 15 of the frame member 6.

図5~図8に示すように、フレーム部材6は、その車両前後方向の窪み部相当位置Pにおいて、フレーム部材アッパ61の中間部材61mに相当するフレームアッパ中間部材61m(図5、図9参照)と、フレーム部材ロア62の中間部材62mに相当するフレームロア中間部材62mと、窪み部15の凹底にてダンパDを取り付ける天板部材65と、車幅方向外側面を構成するアウタパネル66(図3、図5参照)と、で構成されている。 As shown in FIGS. 5 to 8, the frame member 6 has a frame upper intermediate member 61m corresponding to the intermediate member 61m of the frame member upper 61 at the recessed portion corresponding position P in the vehicle front-rear direction (see FIGS. 5 and 9). ), The frame lower intermediate member 62m corresponding to the intermediate member 62m of the frame member lower 62, the top plate member 65 to which the damper D is attached at the concave bottom of the recessed portion 15, and the outer panel 66 constituting the outer surface in the vehicle width direction (). (See FIGS. 3 and 5).

さらに図5、図7、図8に示すように、フレームロア中間部材62mは、フレームロア車幅内側中間部材63とフレームロア車幅外側中間部材64とから構成される。 Further , as shown in FIGS. 5, 7, and 8, the frame lower intermediate member 62m is composed of a frame lower vehicle width inner intermediate member 63 and a frame lower vehicle width outer intermediate member 64.

フレームロア車幅内側中間部材63は、底面視楕円形状の窪み部15の車幅方向内側半分の側面を構成するように車幅方向内側に迫り出した窪み車幅内側面部63aと、該窪み車幅内側面部63aの前縁から前方へ延出する前側フランジ部63b(図7、図8参照)と、該窪み車幅内側面部63aの後縁から後方へ延出する後側フランジ部63c(同図参照)と、窪み車幅内側面部63aの下端部に対して車幅方向内側かつ車両前後方向に延びて車幅内側閉断面6saの下面(底面)を構成する下面部63dと、該下面部63dの車幅方向内端から縦壁状に立ち上がる車幅内側面部63eと、車幅内側面部63eの上端から車幅方向内側へ延出する接合フランジ部62aとで成形により一体に形成されている。 The frame lower vehicle width inner intermediate member 63 includes a recessed vehicle width inner side surface portion 63a protruding inward in the vehicle width direction so as to form a side surface of the vehicle width direction inner half of the recessed portion 15 having an elliptical bottom view, and the recessed vehicle. The front flange portion 63b (see FIGS. 7 and 8) extending forward from the front edge of the width inner side surface portion 63a and the rear flange portion 63c extending rearward from the rear edge of the recessed vehicle width inner side surface portion 63a (same as above). (See the figure), a lower surface portion 63d that extends inward in the vehicle width direction and in the vehicle front-rear direction with respect to the lower end portion of the recessed vehicle width inner side surface portion 63a to form a lower surface (bottom surface) of the vehicle width inner closed cross section 6sa, and the lower surface portion. The vehicle width inner side surface portion 63e rising from the inner end in the vehicle width direction of 63d in a vertical wall shape and the joint flange portion 62a extending inward in the vehicle width direction from the upper end of the vehicle width inner side surface portion 63e are integrally formed by molding. ..

ここで図5に示すように、接合フランジ部62aは、上述したようにリヤフロアパネル4の車幅方向外側端部4bに下面側から接合される。 Here , as shown in FIG. 5, the joint flange portion 62a is joined to the outer end portion 4b in the vehicle width direction of the rear floor panel 4 from the lower surface side as described above.

また図8に示すように、フレームロア車幅内側中間部材63は、下面部63dの車幅方向外端が、窪み車幅内側面部63aの半楕円形状の下端部全体に接合されることに加えて前側フランジ部63bおよび後側フランジ部63c(厳密には後述する後端相当部分63g(図8参照))の各下端部にも一体に接合されている。 Further , as shown in FIG. 8, in the frame lower vehicle width inner intermediate member 63, the outer end in the vehicle width direction of the lower surface portion 63d is joined to the entire semi-elliptical lower end portion of the recessed vehicle width inner side surface portion 63a. In addition , the front flange portion 63b and the rear flange portion 63c (strictly speaking, the rear end corresponding portion 63g (see FIG. 8)) are integrally joined to each lower end portion.

さらにまた図3、図8に示すように、窪み車幅内側面部63aの上下方向に延びる前縁の下部には、フレーム部材6の窪み部15の前側に有する段差面18a(図3、図6参照)の後端相当部分63gが設けられている。すなわち図8に示すように、この後端相当部分63gは、前側フランジ部63bの下部に備えたものであり、前側フランジ部63bは、後端相当部分63gを含めて窪み車幅内側面部63aの前部に上下方向に一体に形成されている。一方、後側フランジ部63cについても、窪み車幅内側面部63aの後縁の上下方向の全体に渡って形成されている。 Furthermore , as shown in FIGS. 3 and 8, a stepped surface 18a (FIG. 3, FIG. 6) The rear end corresponding portion 63 g is provided. That is , as shown in FIG. 8, the rear end corresponding portion 63g is provided in the lower part of the front flange portion 63b, and the front flange portion 63b includes the rear end corresponding portion 63g and is recessed in the vehicle width inner side surface portion 63a. It is integrally formed in the front part of the car in the vertical direction. On the other hand, the rear flange portion 63c is also formed over the entire trailing edge of the inner side surface portion 63a of the recessed vehicle width in the vertical direction.

図5、図7、図8に示すように、フレームロア車幅外側中間部材64は、底面視楕円形状の窪み部15の車幅方向外側半分の側面を構成するように車幅方向外側に迫り出した窪み車幅外側面部64aと、該窪み車幅外側面部64aの前縁から前方へ延出する前側フランジ部64b(図7、図8参照)と、該窪み車幅外側面部64aの後縁から後方へ延出する後側フランジ部64c(同図参照)と、窪み車幅外側面部64aの下端部に対して車幅方向外側かつ車両前後方向に延びて車幅外側閉断面6sbの下面(底面)を構成する下面部64dと、該下面部64dの車幅方向外端から縦壁状に立ち上がる接合フランジ部64eとで成形により一体に形成されている。 As shown in FIGS. 5, 7, and 8, the frame lower vehicle width outer intermediate member 64 approaches the vehicle width outer side so as to form the side surface of the vehicle width outer half of the recess portion 15 having an elliptical bottom view. A recessed vehicle width outer surface portion 64a, a front flange portion 64b (see FIGS. 7 and 8) extending forward from the front edge of the recessed vehicle width outer surface portion 64a, and a trailing edge of the recessed vehicle width outer surface portion 64a. The lower surface of the vehicle width outer closed cross section 6sb extending rearward from the rear side flange portion 64c (see the figure) and extending in the vehicle width direction and in the vehicle front-rear direction with respect to the lower end portion of the recessed vehicle width outer surface portion 64a. The lower surface portion 64d constituting the bottom surface) and the joint flange portion 64e rising from the outer end of the lower surface portion 64d in the vehicle width direction in a vertical wall shape are integrally formed by molding.

ここで窪み部15の前側の車幅方向外側に凹部18を設けることによって図7、図8に示すように、フレームロア車幅外側中間部材64は、車両の後方から前方へ窪み車幅外側面部64aの上下方向長さが徐々に小さくなるように形成している。 Here, by providing the recess 18 on the front side of the recess 15 on the outside in the vehicle width direction, as shown in FIGS. 7 and 8, the frame lower vehicle width outer intermediate member 64 is recessed from the rear to the front of the vehicle and is outside the vehicle width. The surface portion 64a is formed so that the vertical length thereof gradually decreases.

さらに、フレームロア車幅内側中間部材63と同様に、フレームロア車幅外側中間部材64は、その下面部64dの車幅方向内端が、窪み車幅外側面部64aの半楕円形状の下端部全体に接合されることに加えて前側フランジ部64bおよび後側フランジ部64cの各下端部にも一体に接合されている。 Further, similarly to the frame lower vehicle width inner intermediate member 63, the frame lower vehicle width outer intermediate member 64 has an inner end in the vehicle width direction of the lower surface portion 64d thereof, and the entire lower end portion of the semi-elliptical shape of the recessed vehicle width outer surface portion 64a. In addition to being joined to the lower end portions of the front flange portion 64b and the rear flange portion 64c, they are also integrally joined to each lower end portion.

また図5に示すように、フレームロア車幅外側中間部材64の接合フランジ部64eは、アウタパネル66の下端部に接合される。 Further , as shown in FIG. 5, the joint flange portion 64e of the frame lower vehicle width outer intermediate member 64 is joined to the lower end portion of the outer panel 66.

図5、図7、図8に示すように、天板部材65は、平面視楕円形をした平板状のダンパ取付部65aと、ダンパ取付部65aの前後両端を除く周縁から下方へ延出する接合フランジ部65fとで成形により一体形成している。 As shown in FIGS. 5, 7, and 8, the top plate member 65 extends downward from a flat plate-shaped damper mounting portion 65a having an elliptical plan view and a peripheral edge excluding the front and rear ends of the damper mounting portion 65a. It is integrally formed with the joint flange portion 65f by molding.

ダンパ取付部65aは、平面視中央部にダンパDを挿通するダンパ挿通孔65bが貫通形成されており、ダンパ挿通孔65bに対して前後各側には、ボルト挿通孔65c,65dが形成されている(図7、図8参照)。そしてダンパ取付部65aには、ダンパを下方からダンパ挿通孔65bに挿通させて、該ダンパ側に設けたフランジ状の取付け部Da(図5参照)を該ダンパ取付部65aの下面から当接した状態でボルト挿通孔65c,65dにてボルト締結することでダンパDが取付け固定される。 The damper mounting portion 65a has a damper insertion hole 65b through which a damper D is inserted in the central portion in a plan view, and bolt insertion holes 65c and 65d are formed on the front and rear sides of the damper insertion hole 65b. (See FIGS. 7 and 8). Then, the damper D is inserted into the damper insertion hole 65b from below through the damper mounting portion 65a, and the flange-shaped mounting portion Da (see FIG. 5) provided on the damper side abuts from the lower surface of the damper mounting portion 65a. The damper D is attached and fixed by fastening the bolts at the bolt insertion holes 65c and 65d in this state.

上述した窪み部15は、フレームロア車幅内側中間部材63とフレームロア車幅外側中間部材64との各前側フランジ部63b,64b同士を接合するとともに、各後側フランジ部63c,64c同士を接合する(図7参照)。さらに図5に示すように、天板部材65の接合フランジ部65fを、フレームロア車幅内側中間部材63とフレームロア車幅外側中間部材64の各上部63h,64hに窪み部15の内面側から接合することによって形成される。 In the recessed portion 15 described above, the front flange portions 63b and 64b of the frame lower vehicle width inner intermediate member 63 and the frame lower vehicle width outer intermediate member 64 are joined to each other, and the rear flange portions 63c and 64c are joined to each other. (See Fig. 7). Further , as shown in FIG. 5, the joint flange portion 65f of the top plate member 65 is provided on the inner surface side of the recessed portion 15 in the upper portions 63h and 64h of the frame lower vehicle width inner intermediate member 63 and the frame lower vehicle width outer intermediate member 64, respectively. It is formed by joining from.

ここで図5、図6に示すように、フレームアッパ中間部材61mは、上述したように一体に接合したフレームロア中間部材62mと天板部材65とを上方から覆うように配設されており、特に図5に示すように、平面視でダンパ取付部65aに対応する部位において、該ダンパ取付部65aの上面に接合されている。 Here , as shown in FIGS. 5 and 6, the frame upper intermediate member 61m is arranged so as to cover the frame lower intermediate member 62m and the top plate member 65 integrally joined as described above from above. In particular, as shown in FIG. 5, it is joined to the upper surface of the damper mounting portion 65a at a portion corresponding to the damper mounting portion 65a in a plan view.

さらに、フレームアッパ中間部材61mの平面視でダンパ取付部65aのダンパ挿通孔65b、前後各側のボルト挿通孔65c,65dに対応する部位には、夫々該ダンパ挿通孔65bと連通するダンパ挿通孔61ma(図5、図9参照)、前後各側のボルト挿通孔65c,65dと連通する前後各側のボルト挿通孔61mb,61mdが形成されている(図9参照)。 Further, in the plan view of the frame upper intermediate member 61m, the damper insertion holes 65b of the damper mounting portion 65a and the parts corresponding to the bolt insertion holes 65c and 65d on each of the front and rear sides are the damper insertion holes communicating with the damper insertion holes 65b, respectively. 61ma (see FIGS. 5 and 9), bolt insertion holes 61mb and 61md on each front and rear side communicating with bolt insertion holes 65c and 65d on each front and rear side are formed (see FIG. 9).

図5に示すように、アウタパネル66は、その下端部66aが上述したように、フレームロア車幅外側中間部材64の接合フランジ部64eに接合されている。さらにアウタパネル66は、フレーム部材6の車両前後方向の少なくとも窪み部相当位置Pの車幅方向外側面を構成する本体部分66bからさらに上方に延出する上端フランジ部66cが形成されている(図5参照)。 As shown in FIG. 5, the lower end portion 66a of the outer panel 66 is joined to the joint flange portion 64e of the frame lower vehicle width outer intermediate member 64 as described above. Further , the outer panel 66 is formed with an upper end flange portion 66c extending further upward from the main body portion 66b constituting the outer surface in the vehicle width direction of at least the recessed portion corresponding position P in the vehicle front-rear direction of the frame member 6 (FIG. 5).

一方図5、図6に示すように、フレームアッパ中間部材61mには、その車幅方向外端から縦壁状に立ち上がる車幅方向外側フランジ部61mcが形成されている。 On the other hand , as shown in FIGS. 5 and 6, the frame upper intermediate member 61 m is formed with a vehicle width direction outer flange portion 61 mc that rises like a vertical wall from the vehicle width direction outer end thereof.

そして同図に示すように、アウタパネル66の上端フランジ部66cとフレームアッパ中間部材61mの車幅方向外側フランジ部61mcとホイールハウスインナ7aの下端部7bと後述する補強部材30の上方フランジ部37とは、上端フランジ部66cと車幅方向外側フランジ部61mcとをホイールハウスインナ7aの下端部7bと上方フランジ部37とによって挟み込むようにしてリベット(図示省略)等により接合されている。 Then , as shown in the figure, the upper end flange portion 66c of the outer panel 66, the outer flange portion 61 mc in the vehicle width direction of the frame upper intermediate member 61 m, the lower end portion 7b of the wheel house inner 7a, and the upper flange portion 37 of the reinforcing member 30 described later. The upper end flange portion 66c and the outer flange portion 61mc in the vehicle width direction are joined by rivets (not shown) or the like so as to be sandwiched between the lower end portion 7b of the wheel house inner 7a and the upper flange portion 37.

以上により図5に示すように、車幅内側閉断面6saは主にフレームロア車幅内側中間部材63とフレームアッパ中間部材61mとによって形成される一方で、車幅外側閉断面6sbは主にフレームロア車幅外側中間部材64とフレームアッパ中間部材61mとアウタパネル66とによって形成されている。 As shown in FIG. 5, the vehicle width inner closed cross section 6sa is mainly formed by the frame lower vehicle width inner intermediate member 63 and the frame upper intermediate member 61 m, while the vehicle width outer closed cross section 6sb is mainly formed by the frame. It is formed by a lower vehicle width outer intermediate member 64, a frame upper intermediate member 61 m, and an outer panel 66.

また図3、図5、図6に示すように、アウタパネル66は、フレーム部材6の車両前後方向における、後側サスペンション部品取付部16に相当する位置から窪み部相当位置Pを通過して車両前方へ連続して延びている。 Further , as shown in FIGS. 3, 5, and 6, the outer panel 66 passes through the recessed portion corresponding position P from the position corresponding to the rear suspension component mounting portion 16 in the vehicle front-rear direction of the frame member 6 to the vehicle. It extends continuously forward.

図3に示すように、アウタパネル66は、フレーム部材6の車両前後方向における、窪み部相当位置Pの車幅方向外面のみならず傾斜部6Fに相当する部位の車幅方向外面も形成するように傾斜部6Fの傾斜形状に沿ってサイドシルインナ2aの後端に達するまで延びている。 As shown in FIG. 3, the outer panel 66 forms not only the outer surface in the vehicle width direction of the recessed portion corresponding position P in the vehicle front-rear direction of the frame member 6, but also the outer surface in the vehicle width direction of the portion corresponding to the inclined portion 6F. It extends along the inclined shape of the inclined portion 6F until it reaches the rear end of the side sill inner 2a.

そしてアウタパネル66の前端はサイドシルインナ2aの後端に接合されている。 The front end of the outer panel 66 is joined to the rear end of the side silina 2a.

具体的には、ホイールハウスインナ7aの下端部7bと、アウタパネル66の前端と、サイドシルインナ2aの後端とは、車幅方向において該前端を下端部7bと該後端とによって挟み込むようにしてリベット等により3重接合されている(図示省略)。 Specifically, the lower end portion 7b of the wheel house inner 7a, the front end of the outer panel 66, and the rear end of the side sill inner 2a are sandwiched between the lower end portion 7b and the rear end in the vehicle width direction. It is triple-bonded by rivets or the like (not shown).

さらに図3、図6に示すように、アウタパネル66には、車幅方向外側へ突出する稜線67が形成されている。この稜線67は、窪み部相当位置Pからサイドシル2との上記接合部に渡って該アウタパネル66の長手方向(車両前後方向)に連続して延びており、傾斜部6Fの傾斜形状に沿って延びるアウタパネル66の強度を高めている。 Further , as shown in FIGS. 3 and 6, the outer panel 66 is formed with a ridge line 67 projecting outward in the vehicle width direction. The ridge line 67 extends continuously in the longitudinal direction (vehicle front-rear direction) of the outer panel 66 from the recessed portion corresponding position P to the joint portion with the side sill 2, and extends along the inclined shape of the inclined portion 6F. The strength of the outer panel 66 is increased.

さらに本実施形態においては、図1、図4~図6、図9、図10に示すように、フレーム部材6の車両前後方向の特に窪み部相当位置Pを補強する補強部材30をフレーム部材6の上部に備えている。 Further , in the present embodiment, as shown in FIGS. 1, 4 to 6, 9 and 10, the frame member 30 is a reinforcing member 30 that reinforces the position P corresponding to the recessed portion in the vehicle front-rear direction of the frame member 6. It is provided at the top of 6.

補強部材30は、フレーム部材6の車両前後方向の窪み部相当位置Pの前側位置にて前側サイドブレース8とリヤクロスメンバアッパ11とに連結する連結メンバ部31(図1、図4、図9参照)と、連結メンバ部31の後方に位置する補強部材本体部33とでアルミダイカストにより一体に形成されている。 The reinforcing member 30 is a connecting member portion 31 (FIGS. 1, FIG. 4, FIG. 9) connected to the front side brace 8 and the rear cross member upper 11 at the front side position of the recessed portion corresponding position P in the vehicle front-rear direction of the frame member 6. (See) and the reinforcing member main body 33 located behind the connecting member portion 31 are integrally formed by aluminum die casting.

図1、図4、図9に示すように、連結メンバ部31は、フレーム部材6の上方にて該フレーム部材6を横切るように車幅方向に延びており、車幅方向外端が前側サイドブレース8の下端に連結されるとともに、車幅方向内端がリヤクロスメンバアッパ11の車幅方向外端に上方から連結される。これにより、前側サイドブレース8とリヤクロスメンバアッパ11とは、連結メンバ部31を介して連続して延びている(図1、図4参照)。 As shown in FIGS. 1, 4, and 9, the connecting member portion 31 extends in the vehicle width direction above the frame member 6 so as to cross the frame member 6, and the outer end in the vehicle width direction is the front side. It is connected to the lower end of the brace 8 and the inner end in the vehicle width direction is connected to the outer end in the vehicle width direction of the rear cross member upper 11 from above. As a result, the front side brace 8 and the rear cross member upper 11 extend continuously via the connecting member portion 31 (see FIGS. 1 and 4).

連結メンバ部31は、ホイールハウスインナ7aの縦壁部72の車幅方向内面とフレーム部材6の上面とのコーナー部に閉断面31s(図10参照)が構成されるように、これらフレーム部材6とホイールハウスインナ7aとに接合されている。 The connecting member portion 31 has a frame member 6 such that a closed cross section 31s (see FIG. 10) is formed at a corner portion between the inner surface of the vertical wall portion 72 of the wheel house inner 7a in the vehicle width direction and the upper surface of the frame member 6. And the wheel house inner 7a.

図1、図4、図10に示すように、補強部材本体部33は、フレーム部材6の車両前後方向の少なくとも窪み部相当位置Pを通過する車両前後長さを有しており、図4~図6に示すように、上壁部34と車幅内壁部35と後壁部36(図4参照)等によって一体に形成されている。 As shown in FIGS. 1, 4, and 10, the reinforcing member main body 33 has a vehicle front-rear length that passes through at least a recessed portion corresponding position P in the vehicle front-rear direction of the frame member 6. As shown in FIG. 6, the upper wall portion 34, the vehicle width inner wall portion 35, the rear wall portion 36 (see FIG. 4), and the like are integrally formed.

図4に示すように、上壁部34は、フレーム部材6の上面に対して一段高い段状に形成されており、図4~図6に示すように、フレーム部材6の幅広部6Aに相当する幅(車幅方向長さ)を有している。さらに図4、図5、図9に示すように、上壁部34は、平面視でフレーム部材6のダンパ挿通孔61maに対応する部位には、該ダンパ挿通孔61maと上下方向に連通するダンパ挿通孔34aが貫通形成されている。 As shown in FIG. 4, the upper wall portion 34 is formed in a stepped shape higher than the upper surface of the frame member 6, and corresponds to the wide portion 6A of the frame member 6 as shown in FIGS. 4 to 6. It has a width (length in the vehicle width direction). Further , as shown in FIGS. 4, 5, and 9, the upper wall portion 34 communicates vertically with the damper insertion hole 61ma at a portion corresponding to the damper insertion hole 61ma of the frame member 6 in a plan view. The damper insertion hole 34a is formed through.

さらにまた、上壁部34のダンパ挿通孔34aに対して前後両側には、図4、図10、図11(a)に示すように、それぞれ前側ダンパ取付凹部34b、後側ダンパ取付凹部34cが形成されており、共に上壁部34の上面から下方へ凹状に形成されている。そして、前後各側のダンパ取付凹部34b,34cの凹底の中心部には、図4、図9、図11(a)(b)に示すように、ダンパ締結用のボルト挿通孔34d,34eが前後各側のボルト挿通孔61mc,61mbに上下方向に連通するように貫通形成されている。 Furthermore, as shown in FIGS. 4, 10 and 11 (a), the front damper mounting recess 34b and the rear damper mounting recess 34c are provided on both front and rear sides of the upper wall portion 34 with respect to the damper insertion hole 34a, respectively. It is formed, and both are formed in a concave shape downward from the upper surface of the upper wall portion 34. Then, as shown in FIGS. 4, 9 and 11 (a) and 11 (b), bolt insertion holes 34d and 34e for fastening dampers are located at the center of the concave bottoms of the damper mounting recesses 34b and 34c on the front and rear sides. Is formed to penetrate the bolt insertion holes 61 mc and 61 mb on each of the front and rear sides so as to communicate with each other in the vertical direction.

図4、図6、図10に示すように、上壁部34の車幅方向外端には、該車幅方向外端から上方に延びる上方フランジ部37が一体に形成されている。 As shown in FIGS. 4, 6 and 10, an upper flange portion 37 extending upward from the outer end in the vehicle width direction is integrally formed at the outer end in the vehicle width direction of the upper wall portion 34.

なお図1、図4、図10に示すように、補強部材本体部33の車両前後方向における、後側ダンパ取付凹部34cが形成された位置の車幅方向外側端部には、該車幅方向外側端部から上方フランジ部37よりもさらに上方へ延する上方延出部38が形成されており、上方延出部38の上端は後側サイドブレース9の下端部に接合される(図1、図4参照)。さらに、上方延出部38は、ホイールハウスインナ7aにも接合されており、両者の間には、上下方向に延びる閉断面38sを構成する。 As shown in FIGS. 1, 4, and 10, the vehicle width is located at the outer end portion of the reinforcing member main body 33 in the vehicle front-rear direction at the position where the rear damper mounting recess 34c is formed. An upward extending portion 38 extending further upward from the upper flange portion 37 from the outer end portion in the direction is formed, and the upper end of the upper extending portion 38 is joined to the lower end portion of the rear side brace 9 (FIG. 1). , See FIG. 4). Further, the upward extending portion 38 is also joined to the wheel house inner 7a, and a closed cross section 38s extending in the vertical direction is formed between the two.

図4~図6、図11(a)(b)に示すように、車幅内壁部35は、上壁部34の車幅方向内端から下方程車幅方向内側へ延びており、その下部には下方程車幅方向内側へさらに延出する側方フランジ部35aが一体に形成されている。 As shown in FIGS. 4 to 6 and 11 (a) and 11 (b), the vehicle width inner wall portion 35 extends inward in the vehicle width direction from the inner end in the vehicle width direction of the upper wall portion 34, and the lower portion thereof. A side flange portion 35a that extends further inward in the vehicle width direction toward the lower side is integrally formed.

図4、図10、図11(a)(b)に示すように、後壁部36は、上壁部34の後端から下方へ延びており、その下端部には該下端部から後方へ延出する後方フランジ部36aが一体に形成されている。 As shown in FIGS. 4, 10, 11 (a) and 11 (b), the rear wall portion 36 extends downward from the rear end of the upper wall portion 34, and the lower end portion thereof extends rearward from the lower end portion. The extending rear flange portion 36a is integrally formed.

そして、補強部材本体部33の上方フランジ部37をホイールハウスインナ7aの縦壁部72(図4~図6、図10参照)に、上述したように、上端フランジ部66cと車幅方向外側フランジ部61mcとを介してリベット(図示省略)等により接合されている(図5参照)。さらに、補強部材本体部33の側方フランジ部35aをフレームアッパ中間部材61mの車幅方向内側面部61md(図4~図6参照)に、補強部材本体部33の後方フランジ部36aをフレーム部材6の上面部61me(図4、図10参照)に、夫々リベット接合することにより、補強部材本体部33はフレーム部材6に対して上壁部34が上方に***するように取り付けられている。なお、図4中の●印はリベット部分を示し、×印はスポット溶接部分を示す。 Then, as described above, the upper flange portion 37 of the reinforcing member main body portion 33 is attached to the vertical wall portion 72 of the wheel house inner 7a (see FIGS. 4 to 6 and 10), and the upper end flange portion 66c and the outer flange in the vehicle width direction are used. It is joined to the portion 61 mc by a rivet (not shown) or the like (see FIG. 5). Further, the side flange portion 35a of the reinforcing member main body 33 is attached to the inner side surface portion 61md (see FIGS. 4 to 6) of the frame upper intermediate member 61m in the vehicle width direction, and the rear flange portion 36a of the reinforcing member main body 33 is attached to the frame member 6. The reinforcing member main body 33 is attached to the upper surface portion 61me (see FIGS. 4 and 10) so that the upper wall portion 34 rises upward with respect to the frame member 6. The ● mark in FIG. 4 indicates a rivet portion, and the × mark indicates a spot welded portion.

これにより図5、図6に示すように、補強部材本体部33(特に上壁部34と車幅内壁部35)とフレーム部材6の上面部61meとフレーム部材6の車幅方向外側フランジ部61mcとによって、車両前後方向に延びる閉断面33sを構成している。
同図に示すように、閉断面33sは、フレーム部材6の上方において該フレーム部材6の上面部61meとホイールハウスインナ7aの縦壁部72とのコーナー部のみならず、該フレーム部材6の車幅方向の全体に渡って形成されている。
As a result , as shown in FIGS. 5 and 6, the reinforcing member main body portion 33 (particularly the upper wall portion 34 and the vehicle width inner wall portion 35), the upper surface portion 61me of the frame member 6, and the vehicle width direction outer flange portion of the frame member 6 The 61 mc constitutes a closed cross section 33 s extending in the front-rear direction of the vehicle.
As shown in the figure, the closed cross section 33s includes not only the corner portion between the upper surface portion 61me of the frame member 6 and the vertical wall portion 72 of the wheel house inner 7a above the frame member 6, but also the vehicle of the frame member 6. It is formed over the entire width direction.

また図4、図5、図10、図11(a)(b)に示すように、補強部材30には、車幅方向および上下方向に延びる面を有するリブ50~55を備えている。 Further, as shown in FIGS. 4, 5, 10, 11 (a) and 11 (b), the reinforcing member 30 is provided with ribs 50 to 55 having surfaces extending in the vehicle width direction and the vertical direction.

リブ50~55は、補強部材本体部33の上壁部34に対して上下各側において補強部材本体部33の車両前後方向に間隔を隔てて複数配設されている(図4、図10、図11(a)(b)参照)。 A plurality of ribs 50 to 55 are arranged on each of the upper and lower sides of the upper wall portion 34 of the reinforcing member main body 33 at intervals in the vehicle front-rear direction of the reinforcing member main body 33 (FIGS. 4, 10 and 10). 11 (a) and 11 (b)).

具体的に図10、図11(b)に示すように、補強部材本体部33の上壁部34の下面側から下側に形成された下リブ50,51(51a,51b,51c),52,53(53a,53b,53c)は、車両前方から後方へ順に前端下リブ50、前側下第1リブ51a、前側下第2リブ51b(図11(b)参照)、前側下第3リブ51c、中間下リブ52(図5、図11(b)参照)、後側下第1リブ53a、後側下第2リブ53b(図11(b)参照)、後側下第3リブ53cを備えている。これら下リブ50~53は、いずれも閉断面33sに配設されており、車幅方向内端が補強部材本体部33の車幅内壁部35に接合されている。 Specifically, as shown in FIGS. 10 and 11 (b), the lower ribs 50, 51 (51a, 51b, 51c), 52 formed from the lower surface side to the lower side of the upper wall portion 34 of the reinforcing member main body portion 33. , 53 (53a, 53b, 53c) are the front end lower rib 50, the front lower first rib 51a, the front lower second rib 51b (see FIG. 11B), and the front lower third rib 51c in order from the front to the rear of the vehicle. , Middle lower rib 52 (see FIGS. 5, 11 (b)), rear lower first rib 53a, rear lower second rib 53b (see FIG. 11 (b)), rear lower third rib 53c. ing. All of these lower ribs 50 to 53 are arranged in a closed cross section 33s, and the inner end in the vehicle width direction is joined to the vehicle width inner wall portion 35 of the reinforcing member main body portion 33.

図10、図11(b)に示すように、前端下リブ50は、補強部材本体部33の前端(補強部材本体部33と連結メンバ部31部との結合部)において補強部材本体部33の閉断面33s(図10参照)と連結メンバ部31部の閉断面31s(同図参照)とを仕切るように配設されている。 As shown in FIGS. 10 and 11B, the front end lower rib 50 is a reinforcing member main body 33 at the front end of the reinforcing member main body 33 (a joint portion between the reinforcing member main body 33 and the connecting member 31). It is arranged so as to partition the closed cross section 33s (see FIG. 10) and the closed cross section 31s (see FIG. 10) of the connecting member portion 31.

同図に示すように、前側下第1リブ51a、前側下第2リブ51b(図11(b)参照)、前側下第3リブ51cは、夫々上壁部34の車両前後方向の凹状の前側ダンパ取付凹部34bの前縁、ボルト挿通孔34dの中心、後縁に対応する位置に配設されている。 As shown in the figure, the front lower first rib 51a, the front lower second rib 51b (see FIG. 11B), and the front lower third rib 51c are each concave front side of the upper wall portion 34 in the vehicle front-rear direction. It is arranged at a position corresponding to the leading edge of the damper mounting recess 34b, the center of the bolt insertion hole 34d, and the trailing edge.

図5、図11(b)に示すように、中間下リブ52は、上壁部34の車両前後方向のダンパ挿通孔34aの中心に対応する位置にて車幅内壁部35とダンパ挿通孔34aの車幅方向内端とを車幅方向に連結するように配設されている。 As shown in FIGS. 5 and 11B, the intermediate lower rib 52 has the vehicle width inner wall portion 35 and the damper insertion hole 34a at positions corresponding to the center of the damper insertion hole 34a in the vehicle front-rear direction of the upper wall portion 34. It is arranged so as to connect the inner end in the vehicle width direction of the vehicle in the vehicle width direction.

図10、図11(b)に示すように、後側下第1リブ53a、後側下第2リブ53b(図11(b)参照)、後側下第3リブ53cは、夫々上壁部34の車両前後方向の凹状の後側ダンパ取付凹部34c部の前縁、ボルト挿通孔34eの中心、後縁に対応する位置に配設されている。 As shown in FIGS. 10 and 11B, the lower rear side first rib 53a, the lower rear side lower second rib 53b (see FIG. 11B), and the lower rear side lower third rib 53c are the upper wall portions, respectively. The 34 is arranged at a position corresponding to the leading edge of the concave rear damper mounting recess 34c in the vehicle front-rear direction, the center of the bolt insertion hole 34e, and the trailing edge.

一方図4、図10、図11(a)に示すように、補強部材本体部33の上壁部34の上面から上側に形成された上リブ54(54a,54b),55(55a,55b)は、車両前方から後方へ順に、前側上第1リブ54a、前側上第2リブ54b、後側上第1リブ55a、後側上第2リブ55bが配設されおり、いずれも車幅方向外端が上方フランジ部37に接合されている。 On the other hand , as shown in FIGS. 4, 10, and 11 (a), the upper ribs 54 (54a, 54b), 55 (55a, 55b) formed above the upper surface of the upper wall portion 34 of the reinforcing member main body 33. ) Are arranged in order from the front to the rear of the vehicle, the front upper first rib 54a, the front upper second rib 54b, the rear upper first rib 55a, and the rear upper second rib 55b, all of which are arranged in the vehicle width direction. The outer end is joined to the upper flange portion 37.

前側上第1リブ54a、前側上第2リブ54bは、夫々上壁部34の車両前後方向の凹状の前側ダンパ取付凹部34bの前縁、後縁に対応する位置に配設されている(同図参照)。 The front upper first rib 54a and the front upper second rib 54b are arranged at positions corresponding to the leading edge and the trailing edge of the concave front damper mounting recess 34b of the upper wall portion 34 in the vehicle front-rear direction, respectively (the same). See figure).

後側上第1リブ55a、後側上第2リブ55bは、夫々上壁部34の車両前後方向の凹状の後側ダンパ取付凹部34cの前縁、後縁に対応する位置に配設されている(同図参照)。 The rear upper first rib 55a and the rear upper second rib 55b are arranged at positions corresponding to the leading edge and the trailing edge of the concave rear damper mounting recess 34c of the upper wall portion 34 in the vehicle front-rear direction, respectively. (See the figure).

すなわち図10に示すように、前側上第1リブ54aと前側下第1リブ51a、前側上第2リブ54bと前側下第3リブ51c、後側上第1リブ55aと後側下第1リブ53a、後側上第2リブ55bと後側下第3リブ53cは、共に上壁部34を隔てて上下方向に連続するように延びいている。 That is , as shown in FIG. 10, the front upper first rib 54a and the front lower first rib 51a, the front upper second rib 54b and the front lower third rib 51c, and the posterior upper first rib 55a and the rear lower first. The rib 53a, the rear upper second rib 55b, and the rear lower third rib 53c both extend so as to be continuous in the vertical direction across the upper wall portion 34.

上述したように、本実施形態の後部車体構造Vは、車体後部に車両前後方向に延びる閉断面6sが内部に構成されたフレーム部材6を有し(図1、図2参照)、フレーム部材6には、該フレーム部材6の下面の車幅方向中央を上方に窪ませることにより、リヤサスペンションに備えたダンパD(図5参照)を下方から挿入固定する窪み部15が形成されており(図2、図3参照)、フレーム部材6の車両前後方向の窪み部15に相当する窪み部相当位置Pにて、ダンパDに対して車幅方向内外各側に閉断面6sを分岐する分岐状の閉断面6sa,6sbを形成した後部車体構造であって(図5参照)、窪み部相当位置PのダンパDに対して車幅方向の少なくとも一方に、分岐状の閉断面6sa,6sbとは別に車両前後方向に延びる閉断面33s(補強閉断面)を構成する補強部材30を備えたものである(図1、図4、図5、図10参照)。 As described above, the rear vehicle body structure V of the present embodiment has a frame member 6 having a closed cross section 6s extending in the vehicle front-rear direction inside the rear portion of the vehicle body (see FIGS. 1 and 2), and the frame member 6 In the frame member 6, a recessed portion 15 is formed in which the center of the lower surface of the frame member 6 in the vehicle width direction is recessed upward to insert and fix the damper D (see FIG. 5) provided in the rear suspension from below (FIG. 5). 2. Refer to FIG. 3), at the position P corresponding to the recess 15 in the vehicle front-rear direction of the frame member 6, a branched cross section 6s is branched to the inside and outside of the vehicle width direction with respect to the damper D. It is a rear vehicle body structure having closed cross sections 6sa and 6sb formed (see FIG. 5), and is separate from the bifurcated closed cross sections 6sa and 6sb on at least one of the vehicle width directions with respect to the damper D at the recessed portion corresponding position P. It is provided with a reinforcing member 30 constituting a closed cross section 33s (reinforcing closed cross section) extending in the front-rear direction of the vehicle (see FIGS. 1, 4, 5, and 10).

上記構成によれば、フレーム部材6の車両前後方向における、窪み部相当位置Pは、該窪み部15が形成されることによって、フレーム部材6の内部に有する閉断面6sが車幅方向内外両側に分岐状に構成される(図5参照)。このため、フレーム部材6の窪み部相当位置Pは、窪み部15が形成されていない部位と比較して閉断面6s(断面係数)が小さくなるが、フレーム部材6に補強部材30を備えることにより、これらフレーム部材6と補強部材30との間に車両前後方向に延びる閉断面33sを構成することができる。 According to the above configuration, at the recessed portion corresponding position P in the vehicle front-rear direction of the frame member 6, the closed cross section 6s inside the frame member 6 is formed on both the inside and outside of the vehicle width direction by forming the recessed portion 15. It is configured in a branched shape (see FIG. 5). Therefore, the closed cross-section 6s (section moment of area) of the frame member 6 corresponding to the recessed portion P is smaller than that of the portion where the recessed portion 15 is not formed, but the frame member 6 is provided with the reinforcing member 30. A closed cross section 33s extending in the front-rear direction of the vehicle can be formed between the frame member 6 and the reinforcing member 30.

従って、フレーム部材6の窪み部相当位置Pを補強部材30によって補強することができ、窪み部相当位置Pの車両前後方向(長手方向)の曲げ剛性(断面係数)を高めることができる。 Therefore, the recessed portion corresponding position P of the frame member 6 can be reinforced by the reinforcing member 30, and the bending rigidity (cross-sectional coefficient) of the recessed portion equivalent position P in the vehicle front-rear direction (longitudinal direction) can be increased.

この発明の態様として、閉断面33sは、フレーム部材6の車両前後方向における、窪み部相当位置Pを車両前後方向に通過するように連続して延びている(図5、図6、図10参照)。 As an aspect of the present invention, the closed cross section 33s continuously extends so as to pass through the recessed portion corresponding position P in the vehicle front-rear direction of the frame member 6 in the vehicle front-rear direction (see FIGS. 5, 6, and 10). ).

上記構成によれば、閉断面33sによって、フレーム部材6の車両前後方向における、窪み部相当位置Pに対して前後各側の周辺部分を含めて曲げ剛性を高めることができる。 According to the above configuration, the closed cross section 33s makes it possible to increase the bending rigidity of the frame member 6 in the vehicle front-rear direction, including the peripheral portions on each of the front-rear sides with respect to the recessed portion corresponding position P.

この発明の態様として、窪み部15には、ダンパDの上部を挿通するダンパ挿通孔65bが設けられており、閉断面33sは、窪み部相当位置Pの車幅方向における、上記ダンパ挿通孔65bに対応するダンパ挿通孔34aを除く略全体に渡って設けられたものである(図1、図4、図5参照)。 As an aspect of the present invention, the recessed portion 15 is provided with a damper insertion hole 65b through which the upper portion of the damper D is inserted, and the closed cross section 33s is the damper insertion hole 65b in the vehicle width direction of the recessed portion corresponding position P. It is provided over substantially the entire area except for the damper insertion hole 34a corresponding to the above (see FIGS. 1, 4, and 5).

上記窪み部相当位置Pのダンパ挿通孔34aを除く車幅方向の略全体に渡って閉断面33sを構成できるため、窪み部15を設けることで分岐状の閉断面6sa,6sbが形成されたフレーム部材6の窪み部相当位置Pを効果的に補強することができる。 Since the closed cross section 33s can be formed over substantially the entire vehicle width direction except for the damper insertion hole 34a at the position P corresponding to the recessed portion, the frame in which the branched closed cross sections 6sa and 6sb are formed by providing the recessed portion 15. The position P corresponding to the recessed portion of the member 6 can be effectively reinforced.

この発明の態様として図1、図4、図9に示すように、フレーム部材6に対して車幅方向外側に備えたホイールハウスインナ7aを補強するサイドブレースとしての前側サイドブレース8と、車体後部の両サイドに備えたフレーム部材6を車幅方向に連結するリヤクロスメンバとしてのリヤクロスメンバアッパ11とを備え、補強部材30は、内部に閉断面33s(図5、図6、図10参照)を構成する補強部材本体部33を備えるとともに、車両上下方向に延びる前側サイドブレース8の下端と、車幅方向に延びるリヤクロスメンバアッパ11の車幅外端とを連結する、車幅方向に延びる連結メンバ部31を備え、補強部材本体部33と連結メンバ部31とは結合されたものである。 As an embodiment of the present invention, as shown in FIGS. 1, 4, and 9, a front side brace 8 as a side brace for reinforcing the wheel house inner 7a provided on the outer side in the vehicle width direction with respect to the frame member 6, and a vehicle body. A rear cross member upper 11 as a rear cross member that connects the frame members 6 provided on both sides of the rear portion in the vehicle width direction is provided, and the reinforcing member 30 has a closed cross section 33s (FIGS. 5, 6, and 10) inside. The vehicle width direction is provided with the reinforcing member main body 33 constituting the vehicle (see), and the lower end of the front side brace 8 extending in the vehicle vertical direction is connected to the vehicle width outer end of the rear cross member upper 11 extending in the vehicle width direction. The connecting member portion 31 is provided, and the reinforcing member main body portion 33 and the connecting member portion 31 are connected to each other.

上記構成によれば、補強部材本体部33を連結メンバ部31に結合することで該補強部材本体部33の強度を高めることができ、結果的にフレーム部材6の長手方向の曲げ剛性をさらに高めることができる。 According to the above configuration, the strength of the reinforcing member main body 33 can be increased by connecting the reinforcing member main body 33 to the connecting member portion 31, and as a result, the bending rigidity of the frame member 6 in the longitudinal direction is further increased. be able to.

この発明は、上述の実施例の構成のみに限定されるものではなく様々な実施形態で形成することができる。
例えば、補強部材30は、フレーム部材6の車両前後方向の窪み部相当位置Pにて、これらフレーム部材6とホイールハウスインナ7aとのコーナー部に閉断面33sを形成するように、ホイールハウスインナ7aとフレーム部材6とに接合した構成であれば特に限定せず、例えば、図12(a)(b)に示すように構成してもよい。
The present invention is not limited to the configuration of the above-described embodiment, and can be formed in various embodiments.
For example, the reinforcing member 30 forms a closed cross section 33s at the corner portion between the frame member 6 and the wheel house inner 7a at the position P corresponding to the recessed portion in the vehicle front-rear direction of the frame member 6 so that the wheel house inner 7a is formed. The structure is not particularly limited as long as it is joined to the frame member 6 and may be configured as shown in FIGS. 12 (a) and 12 (b), for example.

図12(a)(b)は、上述した補強部材30とは異なる本発明の他の実施の補強部材30Aを備えた他の実施形態の後部車体構造VAの要部拡大図であって図12(a)、図12(b)は夫々他の実施形態の後部車体構造VAの図4対応図、図1の要部対応図である。
以下、他の実施の補強部材30Aを中心に他の実施形態の後部車体構造VAについて説明するが、上述した補強部材30と同様の構成については同一の符号を付してその説明を省略する。
12 (a) and 12 (b) are enlarged views of a main part of the rear body structure VA of another embodiment provided with the reinforcing member 30A of another embodiment of the present invention different from the reinforcing member 30 described above. (A) and FIG. 12 (b) are a diagram corresponding to FIG. 4 and a diagram corresponding to a main part of FIG. 1 of the rear body structure VA of another embodiment, respectively.
Hereinafter, the rear body structure VA of another embodiment will be described centering on the reinforcing member 30A of another embodiment, but the same reference numerals will be given to the same configurations as those of the reinforcing member 30 described above, and the description thereof will be omitted.

図12(a)(b)に示すように、ここでの後部車体構造VAは、ホイールハウスインナ7aの後部を補強する後側サイドブレース9(図1参照)を備えずに形成しているため、該後側サイドブレース9に連結する上方延出部38を備えずに構成している。 As shown in FIGS. 12 (a) and 12 (b), the rear body structure VA here is formed without the rear side brace 9 (see FIG. 1) for reinforcing the rear portion of the wheel house inner 7a. The rear side brace 9 is not provided with the upward extending portion 38 connected to the rear side brace 9.

さらに上述した補強部材30は、閉断面33sを補強部材本体部33の車両前後方向の全体に渡って形成しているのに対して、補強部材30Aは、閉断面33sを、フレーム部材6の車幅方向全体に形成せずに、車幅方向外側のみ、すなわち、フレーム部材6とホイールハウスインナ7aとのコーナー部側にのみ形成している。 Further , the reinforcing member 30 described above has a closed cross section 33s formed over the entire vehicle front-rear direction of the reinforcing member main body 33, whereas the reinforcing member 30A has a closed cross section 33s of the frame member 6. It is not formed in the entire vehicle width direction, but is formed only on the outside in the vehicle width direction, that is, only on the corner portion side of the frame member 6 and the wheel house inner 7a.

具体的に図12(a)に示すように、補強部材30Aに備えた補強部材本体部33Aを、該補強部材本体部33Aの車両前後方向における、天板部材65のダンパ取付部65a(図10参照)に対応する部位、および該対応する部位よりも前後各側を、それぞれ本体中間部33Ab、本体前側部33Aa、本体後側部33Acに便宜上区分けして夫々について説明する。 Specifically, as shown in FIG. 12A, the reinforcing member main body 33A provided in the reinforcing member 30A is attached to the damper mounting portion 65a of the top plate member 65 in the vehicle front-rear direction of the reinforcing member main body 33A (FIG. 10). Reference) and the front and rear sides of the corresponding parts will be described separately for convenience by dividing them into a main body intermediate portion 33Ab, a main body front side portion 33Aa, and a main body rear side portion 33Ac, respectively.

図12(a)(b)に示すように、補強部材本体部33Aは、本体前側部33Aaおよび本体後側部33Acにおいて、フレーム部材6の車幅方向全体に渡って形成していないが、該フレーム部材6の車幅方向外端からダンパ挿通孔34aの中心(前後各側のボルト挿通孔34d,34e)よりも車幅方向内側に延びており、閉断面33sがフレーム部材6の上面の車幅方向の内側を除いた部位に至まで形成されている。 As shown in FIGS. 12A and 12B, the reinforcing member main body portion 33A is not formed in the main body front side portion 33Aa and the main body rear side portion 33Ac over the entire vehicle width direction of the frame member 6. The frame member 6 extends inward in the vehicle width direction from the center of the damper insertion holes 34a (bolt insertion holes 34d, 34e on each of the front and rear sides) from the outer end in the vehicle width direction, and the closed cross section 33s is a vehicle on the upper surface of the frame member 6. It is formed up to the part excluding the inside in the width direction.

一方図12(a)(b)に示すように、閉断面33sは、本体中間部33Abにおいて、ダンパ挿通孔34aおよび前後各側のボルト挿通孔34d,34eを車幅方向外側へ迂回するように本体前側部33Aaおよび本体後側部33Acよりも幅小にフレーム部材6の車幅方向外側のみに形成している。 On the other hand , as shown in FIGS. 12A and 12B, the closed cross section 33s detours the damper insertion hole 34a and the bolt insertion holes 34d and 34e on each of the front and rear sides outward in the vehicle width direction in the main body intermediate portion 33Ab. It is formed only on the outer side of the frame member 6 in the vehicle width direction, which is smaller in width than the front side portion 33Aa of the main body and the rear side portion 33Ac of the main body.

そして、補強部材本体部33A(閉断面33s)は、本体前側部33Aa、本体中間部33Ab、および本体後側部33Acに渡って車両前後方向に連続(連通)している。 The reinforcing member main body portion 33A (closed cross section 33s) is continuous (communication) in the vehicle front-rear direction over the main body front side portion 33Aa, the main body intermediate portion 33Ab, and the main body rear side portion 33Ac.

これにより、他の実施形態の後部車体構造VAは、フレーム部材6のダンパDに対して車幅方向の少なくとも一方(当例では車幅方向外側)に、窪み部相当位置Pを通過するように閉断面6sとは別に車両前後方向に延びる閉断面33sを構成する補強部材30Aを備えたものである。 As a result, the rear body structure VA of the other embodiment passes through the recessed portion corresponding position P in at least one of the vehicle width directions (in this example, the outside in the vehicle width direction) with respect to the damper D of the frame member 6. In addition to the closed cross section 6s, the reinforcing member 30A constituting the closed cross section 33s extending in the front-rear direction of the vehicle is provided.

また図12(a)(b)に示すように、車幅内壁部35の本体中間部33Abにおける下端部には該下端から車幅方向内側へ延出するフランジ部39が台座状に形成されている。 Further , as shown in FIGS. 12 (a) and 12 (b), a flange portion 39 extending inward in the vehicle width direction from the lower end is formed in a pedestal shape at the lower end of the main body intermediate portion 33Ab of the vehicle width inner wall portion 35. ing.

上述した補強部材本体部33Aの本体中間部33Abにおける車幅方向内端に形成されたフランジ部39は、フレーム部材6の上面に接合されており、平面視で天板部材65のダンパ取付部65aに相当する部位全体に渡ってフレーム部材6(フレームアッパ中間部材61m)の上面に接合されている。
これにより、フランジ部39を、ダンパ取付部65aを補強するダンパ支持補強部として形成している。
The flange portion 39 formed at the inner end in the vehicle width direction of the main body intermediate portion 33Ab of the reinforcing member main body portion 33A described above is joined to the upper surface of the frame member 6, and the damper mounting portion 65a of the top plate member 65 is joined in a plan view. It is joined to the upper surface of the frame member 6 (frame upper intermediate member 61 m) over the entire portion corresponding to the above.
As a result, the flange portion 39 is formed as a damper support reinforcing portion that reinforces the damper mounting portion 65a.

なお、このダンパ支持補強部としてのフランジ部39については、ダンパ取付部65aに形成したダンパ挿通孔65bおよびこの前後各側のボルト挿通孔65c,65dの夫々に対応してダンパ挿通孔34a、前後各側のボルト挿通孔34d,34eが形成されている。 Regarding the flange portion 39 as the damper support and reinforcing portion, the damper insertion holes 34a, front and rear, corresponding to the damper insertion holes 65b formed in the damper mounting portion 65a and the bolt insertion holes 65c and 65d on the front and rear sides thereof, respectively. Bolt insertion holes 34d and 34e on each side are formed.

また、補強部材本体部33Aにも上壁部34に対して上下各側に複数のリブ56が形成されている(図12(a)(b)参照)。 Further, the reinforcing member main body 33A is also formed with a plurality of ribs 56 on each of the upper and lower sides with respect to the upper wall portion 34 (see FIGS. 12 (a) and 12 (b)).

また、他の実施形態として、図5中の仮想線で示すように、車幅内側閉断面6saには、フレームロア車幅内側中間部材63を補強する車幅内側補強パネル63iを備えてもよく、同様に、車幅外側閉断面6sbには、フレームロア車幅外側中間部材64を補強する車幅外側補強パネル64iを備えてもよい。 Further, as another embodiment, as shown by a virtual line in FIG. 5, the vehicle width inner closed cross section 6sa may be provided with a vehicle width inner reinforcing panel 63i for reinforcing the frame lower vehicle width inner intermediate member 63. Similarly, the vehicle width outer closed cross section 6sb may be provided with a vehicle width outer reinforcing panel 64i for reinforcing the frame lower vehicle width outer intermediate member 64.

ここで本実施形態においては、上述したように、窪み部15を、その側面部に相当するフレームロア中間部材62m(63,64)と、ダンパ支持部(15)に相当する天板部材65とで別部材に形成することで(図5、図7、図8参照)、各部材62m,65を、それぞれに要求されるダンパ支持強度に応じた板厚で形成することができる。具体的に本実施形態においては、フレーム部材6の上部に補強部材30,30Aを備えることで、ダンパ支持部(15)を側面部よりも薄い板厚で形成することができることから、上述したように、車幅内側補強パネル63iおよび車幅外側補強パネル64iを備えても、結果的に窪み部15全体を軽量化することができる。 Here, in the present embodiment, as described above, the recessed portion 15 is provided with the frame lower intermediate member 62 m (63, 64) corresponding to the side surface portion thereof and the top plate member 65 corresponding to the damper support portion (15) . By forming the members into separate members (see FIGS. 5, 7, and 8), the respective members 62m and 65 can be formed with a plate thickness corresponding to the damper supporting strength required for each. Specifically, in the present embodiment, by providing the reinforcing members 30 and 30A on the upper portion of the frame member 6, the damper support portion (15) can be formed with a plate thickness thinner than that of the side surface portion, as described above. Even if the vehicle width inner reinforcing panel 63i and the vehicle width outer reinforcing panel 64i are provided, the weight of the entire recessed portion 15 can be reduced as a result.

V,Va…後部車体構造
6…フレーム部材
6s…閉断面
6sa,6sb…分岐状の閉断面
11…リヤクロスメンバアッパ(リヤクロスメンバ)
7a…リヤホイールハウスインナ
8…前側サイドブレース(サイドブレース)
15…窪み部(ダンパ支持部)
30,30A…補強部材
31…連結メンバ部
33…補強部材本体部
33s…閉断面(補強閉断面)
65b…ダンパ挿通孔
D…ダンパ
P…窪み部相当位置
V, Va ... Rear body structure 6 ... Frame member 6s ... Closed cross section 6sa, 6sb ... Branched closed cross section 11 ... Rear cross member upper (rear cross member)
7a ... Rear wheel house inner 8 ... Front side brace (side brace)
15 ... Recessed part (damper support part)
30, 30A ... Reinforcing member 31 ... Connecting member portion 33 ... Reinforcing member main body portion 33s ... Closed cross section (reinforcing closed cross section)
65b ... Damper insertion hole D ... Damper P ... Position equivalent to the recess

Claims (3)

車体後部に車両前後方向に延びる閉断面が内部に構成されたフレーム部材を有し、
上記フレーム部材には、該フレーム部材の下面の車幅方向中央を上方に窪ませることにより、リヤサスペンションに備えたダンパが該フレーム部材の下方から挿入固定される窪み部が形成されており、
上記フレーム部材の車両前後方向の上記窪み部に相当する窪み部相当位置にて、上記ダンパに対して車幅方向内外各側に上記閉断面を分岐する分岐状の閉断面を形成した後部車体構造であって、
上記窪み部相当位置の上記ダンパに対して車幅方向の少なくとも一方に、上記分岐状の閉断面とは別に車両前後方向に延びる補強閉断面を構成する補強部材を備え
上記補強閉断面は、上記フレーム部材の車両前後方向における、上記窪み部相当位置を車両前後方向に通過するように連続して延びている
後部車体構造。
The rear part of the vehicle body has a frame member having a closed cross section extending in the front-rear direction of the vehicle.
The frame member is formed with a recessed portion in which the damper provided on the rear suspension is inserted and fixed from below the frame member by recessing the center of the lower surface of the frame member in the vehicle width direction upward.
A rear vehicle body structure in which a branched closed cross section is formed on each side of the frame member in the vehicle width direction in and out of the vehicle at a position corresponding to the recess corresponding to the recess in the vehicle front-rear direction. And,
A reinforcing member constituting a reinforcing closed cross section extending in the front-rear direction of the vehicle is provided on at least one of the dampers corresponding to the recessed portion in the vehicle width direction in addition to the branched closed cross section .
The reinforced closed cross section continuously extends so as to pass through the position corresponding to the recess in the vehicle front-rear direction of the frame member in the vehicle front-rear direction.
Rear body structure.
車体後部に車両前後方向に延びる閉断面が内部に構成されたフレーム部材を有し、
上記フレーム部材には、該フレーム部材の下面の車幅方向中央を上方に窪ませることにより、リヤサスペンションに備えたダンパが該フレーム部材の下方から挿入固定される窪み部が形成されており、
上記フレーム部材の車両前後方向の上記窪み部に相当する窪み部相当位置にて、上記ダンパに対して車幅方向内外各側に上記閉断面を分岐する分岐状の閉断面を形成した後部車体構造であって、
上記窪み部相当位置の上記ダンパに対して車幅方向の少なくとも一方に、上記分岐状の閉断面とは別に車両前後方向に延びる補強閉断面を構成する補強部材を備え、
上記フレーム部材に対して車幅方向外側に備えたリヤホイールハウスインナを補強するサイドブレースと、
車体後部の両サイドに備えた上記フレーム部材を車幅方向に連結するリヤクロスメンバとを備え、
上記補強部材は、
内部に上記補強閉断面を構成する補強部材本体部を備えるとともに、
車両上下方向に延びる上記サイドブレースの下端と、車幅方向に延びる上記リヤクロスメンバの車幅外端とを連結する、車幅方向に延びる連結メンバ部を備え、
上記補強部材本体部と上記連結メンバ部とは結合されている
後部車体構造。
The rear part of the vehicle body has a frame member having a closed cross section extending in the front-rear direction of the vehicle.
The frame member is formed with a recessed portion in which the damper provided on the rear suspension is inserted and fixed from below the frame member by recessing the center of the lower surface of the frame member in the vehicle width direction upward.
A rear vehicle body structure in which a branched closed cross section is formed on each side of the frame member in the vehicle width direction in and out of the vehicle at a position corresponding to the recess corresponding to the recess in the vehicle front-rear direction. And,
A reinforcing member constituting a reinforcing closed cross section extending in the front-rear direction of the vehicle is provided on at least one of the dampers corresponding to the recessed portion in the vehicle width direction in addition to the branched closed cross section.
The side brace that reinforces the rear wheel house inner provided on the outside in the vehicle width direction with respect to the above frame member,
It is equipped with a rear cross member that connects the above frame members provided on both sides of the rear part of the vehicle body in the vehicle width direction.
The above reinforcing member
In addition to being provided with a reinforcing member main body that constitutes the above-mentioned reinforced closed cross section,
A connecting member portion extending in the vehicle width direction is provided, which connects the lower end of the side brace extending in the vertical direction of the vehicle and the outer end of the rear cross member extending in the vehicle width direction.
A rear body structure in which the reinforcing member main body portion and the connecting member portion are connected.
上記窪み部には、上記ダンパの上部を挿通するダンパ挿通孔が設けられており、
上記補強閉断面は、上記窪み部相当位置の車幅方向における、上記ダンパ挿通孔を除く略全体に渡って設けられた
請求項1または2に記載の後部車体構造。
The recessed portion is provided with a damper insertion hole through which the upper portion of the damper is inserted.
The rear vehicle body structure according to claim 1 or 2, wherein the reinforced closed cross section is provided over substantially the entire area excluding the damper insertion hole in the vehicle width direction at a position corresponding to the recess.
JP2018053188A 2018-03-20 2018-03-20 Rear body structure Active JP7028000B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012006544A (en) 2010-06-28 2012-01-12 Mazda Motor Corp Lower part vehicle body structure for vehicle
JP2018034577A (en) 2016-08-30 2018-03-08 マツダ株式会社 Vehicle body rear part structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0687155U (en) * 1993-05-28 1994-12-20 富士重工業株式会社 Vehicle rear suspension mounting structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012006544A (en) 2010-06-28 2012-01-12 Mazda Motor Corp Lower part vehicle body structure for vehicle
JP2018034577A (en) 2016-08-30 2018-03-08 マツダ株式会社 Vehicle body rear part structure

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