JP4734797B2 - Rear body structure of automobile - Google Patents

Rear body structure of automobile Download PDF

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Publication number
JP4734797B2
JP4734797B2 JP2001240180A JP2001240180A JP4734797B2 JP 4734797 B2 JP4734797 B2 JP 4734797B2 JP 2001240180 A JP2001240180 A JP 2001240180A JP 2001240180 A JP2001240180 A JP 2001240180A JP 4734797 B2 JP4734797 B2 JP 4734797B2
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Japan
Prior art keywords
gusset
rear side
damper
cross member
bracket
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JP2001240180A
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Japanese (ja)
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JP2003048568A (en
Inventor
忠信 山本
昭雄 柴田
勝美 江島
晋 佐野
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Mazda Motor Corp
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Mazda Motor Corp
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Priority to JP2001240180A priority Critical patent/JP4734797B2/en
Publication of JP2003048568A publication Critical patent/JP2003048568A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/60Subframe construction

Description

【0001】
【発明の属する技術分野】
この発明は、車両の前後方向に延びる左右のリヤサイドフレームと、リヤサスペンションとを備えたような自動車の後部車体構造に関する。
【0002】
【従来の技術】
従来、上述例の自動車の後部車体構造としては、例えば、特開平5−139342号公報に記載のものがある。
すなわち、リヤサスペンションのダンパ部材を回避するように、リヤサイドフレームにおけるダンパ部材と対応する部分を車幅方向内方へ湾曲させたものである。
【0003】
このように車両の前後方向に延びる左右のリヤサイドフレームの一部を車幅方向内方へ湾曲させると、これら湾曲部相互間の間隔が狭くなり、左右のタイヤハウス間の間隔が狭小となって、荷室スペースが小さくなる問題点があった。
【0004】
このような問題点を解決するために、特開平8−133133号公報に記載の自動車の後部車体構造においては、リヤフロアに凹状のV溝部を形成し、このV溝部とアクスルハブとの間にリヤサスペンションのダンパ部材を取付けている。
【0005】
このように構成すると、荷室スペースの拡大を図ることができる利点がある反面、外低内高状にスラント配置させたダンパ部材の上端部をリヤフロアパネルに取付ける関係上、シール性などで極めて不利となる問題点があった。
【0006】
【発明が解決しようとする課題】
この発明は、車両の前後方向に沿ってほぼ直線状に延びる左右のリヤサイドフレームを設け、これらリヤサイドフレーム間にクロスメンバを接続し、このクロスメンバとリヤサイドフレームとをガセット部材で連結して、該ガセット部材にダンパ部材を支持させると共に、上記ガセット部材とクロスメンバとに架設されたブラケットを設けて、上記ダンパ部材を該ブラケットに支持させ、該ブラケットをクロスメンバに1点で支持させると共に、ガセット部材に2点で支持させて、上記リヤサイドフレームと離間して配設し、上記ダンパ部材をフロアの下側に配置して、上記ガセット部材を上記クロスメンバおよび上記リヤサイドフレームの下縁よりも上方に位置させつつ、上記ガセット部材により上記クロスメンバおよび上記リヤサイドフレームの下縁よりも上方で上記ダンパ部材を支持させ、上記ガセット部材の延設方向と上記ダンパ部材の傾斜方向を同じに設定することで、ダンパ部材をフロア下側にレイアウトすることができて、左右のタイヤハウス間のスペースを広く設定することができて、荷室スペースの拡大を図ることができ、またダンパ部材はリヤフロアに取付けることなく、ガセット部材に支持させることにより、フロアのシール性などの問題が生じないことは勿論、クロスメンバとリヤサイドフレームとの結合部分の剛性を上記ガセット部材にて向上させることができるうえ、ダンパ部材の支持剛性向上を図ることができ、しかも、必要最小限の支持点数でもって、ブラケットをクロスメンバおよびガセット部材に強固に支持することができる自動車の後部車体構造の提供を目的とする。
【0007】
【課題を解決するための手段】
この発明による自動車の後部車体構造は、車両の前後方向に沿ってほぼ直線状に配置された左右のリヤサイドフレームを設け、上記左右のリヤサイドフレーム間にクロスメンバを接続すると共に、上記クロスメンバと上記リヤサイドフレームとをガセット部材で連結し、上記ガセット部材にリヤサスペンションのダンパ部材を支持させ、上記ガセット部材とクロスメンバとに架設されたブラケットを設けて、上記ダンパ部材を該ブラケットに支持させており、該ブラケットはクロスメンバに1点で支持されると共に、ガセット部材に2点で支持され、上記リヤサイドフレームと離間して配設されており、上記ダンパ部材はフロアの下側に配置され、上記ガセット部材が上記クロスメンバおよび上記リヤサイドフレームの下縁よりも上方に位置し、上記クロスメンバおよび上記リヤサイドフレームの下縁よりも上方で上記ダンパ部材を支持しており、上記ガセット部材の延設方向と上記ダンパ部材の傾斜方向が同じに設定されたものである。
上記構成のリヤサスペンションは、マルチリンクサスペンションで構成してもよい。
【0008】
上記構成によれば、上述のガセット部材にダンパ部材を支持させたので、このダンパ部材をフロア下側にレイアウトすることができて、左右のタイヤハウス間のスペースを広く設定することができ、この結果、荷室スペースの拡大を図ることができる。
【0009】
また、上述のダンパ部材はリヤフロアに取付けることなく、上記ガセット部材に支持させるので、フロアのシール性などの問題は発生しない。
しかも、クロスメンバとリヤサイドフレームとをガセット部材で連結したので、クロスメンバとリヤサイドフレームとの結合部分の剛性を上述のガセット部材にて向上させることができるうえ、ダンパ部材の支持剛性向上を図ることができる。
【0010】
また、上記ブラケットを設けたことにより、ダンパ部材の支持剛性がさらに向上する。
【0011】
また、上記ブラケットはクロスメンバに1点で支持されると共に、ガセット部材に2点で支持されるので、必要最小限の支持点数でもって、ブラケットをクロスメンバおよびガセット部材に強固に支持することができる。
【0012】
また、上記ダンパ部材はフロアの下側に配置されることで、ダンパ部材がフロアの上側に突出しないので、荷室スペースを何等阻害することなく、加えて、ダンパ部材がフロアを貫通する構造でもないので、シール性についても何等問題は発生しない。
【0013】
この発明の一実施態様においては、上記ダンパ部材はその上部が車幅方向内方で、かつ車両前方となるよう傾斜配設されたものである。
上記構成によれば、ダンパ部材を上述のように傾斜配設したので、該ダンパ部材の配設高さを小さくしつつ、ダンパ部材のストロークを確保することができる。
【0014】
この発明の一実施態様においては、上記クロスメンバの一部と上記ガセット部材との両者で平面視で略U字状部が形成され、上記ブラケットは略U字状部に沿設するよう上記両者間に支持されたものである。
【0015】
上記構成によれば、ダンパ部材の上部を略U字状部による空間部分に位置させることができるので、ダンパ部材の配設スペースを充分に確保しつつ、該ダンパ部材の支持剛性をより一層向上させることができる。
【0016】
【実施例】
この発明の一実施例を以下図面に基づいて詳述する。
図面は自動車の後部車体構造を示し、図1、図2において、リヤフロアパネル1の下面には車両の前後方向に延び平面から見てほぼ直線状に配置された左右のリヤサイドフレーム2,2(但し、図面においては図示の便宜上、右側のリヤサイドフレームのみを示す)を設けている。
【0017】
上述のリヤサイドフレーム2はその上部に接合フランジ部2a,2aを有し、これらの接合フランジ部2a,2aをリヤフロアパネル1の下面に接合することで、車両の前後方向に延びる閉断面3を形成している。
【0018】
上述の左右のリヤサイドフレーム2,2間には車幅方向に延びるクロスメンバ4を接続し、このクロスメンバ4とリヤフロアパネル1との間には、車幅方向に延びる閉断面5を形成している。
【0019】
上述のクロスメンバ4は図3に示す如く、その上部前後に該クロスメンバ4の長手方向(車幅方向)に沿った接合フランジ部4a,4aを有すると共に、左右両端部には上記リヤサイドフレーム2の縦壁部と底部とに接合する接合片4b,4b,4cが一体または一体的に成されている。
【0020】
上述のクロスメンバ4の接合フランジ部4a,4aをリヤフロアパネル1の下面に、接合片4b,4bをリヤサイドフレーム2の縦壁部に、接合片4cをリヤサイドフレーム2の底部にそれぞれ接合することにより、該クロスメンバ4を左右のリヤサイドフレーム2,2間に張架している。
【0021】
一方、図1、図2に示すようなマルチリンクタイプのリヤサスペンション6を設けている。
このリヤサスペンション6は、トレーリングアーム7、アッパアーム8、ロアアーム9、ラテラルリンク10、ダンパ部材11およびサスペンションクロスメンバ12(いわゆるサスクロス)を備え、左右の後輪を独立懸架する。
【0022】
上述のトレーリングアーム7は車体への取付け部7a、ラテラルリンク貫通部7b、ダンパ部材取付け部7c、アッパアーム取付け部7d、ロアアーム取付け部7eを有し、車体への取付け部7aがリヤサイドフレーム2の所定部に取付けられている。
【0023】
サスペンションクロスメンバ12は図4に示すように複数の部材13〜16を組合わせて一体化したもので、このサスペンションクロスメンバ12の左右両端部は車両の前後方向に離反する二股状に形成されている。
【0024】
そして、上述の二股状部の端部に設けられた合計4つのマウント部m1,m2,m3,m4はラバーマウントを介してリヤサイドフレーム2,2の所定箇所にマウントされる。
【0025】
また上述の複数の部材13〜16のうち部材16はアッパアームブラケットに設定され、このアッパアームブラケット16にはアッパアーム8の車体内方側端部が揺動自在に支持される。
【0026】
ところで、図1、図3に示すように、上述の車幅方向に延びるクロスメンバ4と、車両の前後方向に延びるリヤサイドフレーム2とをガセット部材17で連結し、図1、図3に示す如くクロスメンバ4の端部側一部とガセット部材17との両者で平面視で略U字状部18を形成している。
【0027】
上述のガセット部材17は図5に示すようにその上部前後にはリヤフロアパネル1に接合する接合フランジ部17a,17aを有すると共に、車外側端部にはリヤサイドフレーム2の縦壁部と底部とに接合する接合片17b,17cが一体形成され、車内側端部にはクロスメンバ4の縦壁部と側部とに接合する接合片17d,17eが一体形成された補強手段である。
【0028】
そして、ガセット部材17の接合フランジ部17a,17aをリヤフロアパネル1およびクロスメンバ4における接合フランジ部4aの下面に接合して、閉断面19(図2参照)を形成し、またガセット部材17の接合片17bをリヤサイドフレーム2の縦壁部に、接合片17cをリヤサイドフレーム2の底部に、接合片17dをクロスメンバ4の縦壁部に、接合片17eをクロスメンバ4の底部にそれぞれ接合することにより、このガセット部材17をクロスメンバ4とリヤサイドフレーム2との間に取付けている。
しかも、図1、図2に示すように上述のガセット部材17とクロスメンバ4との間に架設されたブラケット20を設けている。
【0029】
上述のブラケット20は図6に示すように、ガセット部材17の底部に取付けられる断面門形のリヤ側の取付け部21と、クロスメンバ4の底部に取付けられる断面門形のフロント側の取付け部22と、上述の取付け部21から上方に立ち上がる略コの字の立設片23とを一体または一体形成した補強部材であって、この実施例ではリヤ側の取付け部21に対してフロント側の取付け部22が所定量低くなるように構成されている。
【0030】
上述のリヤ側の取付け部21には合計2個の取付け孔24,24が形成され、フロント側の取付け側22には1個の取付け孔25が形成されると共に、立設片23の対向部位にはダンパ部材11の上部を取付ける取付け孔26,26が形成されている。
【0031】
上述のブラケット20は図1に平面図で示すように略U字状部18に沿設するようにクロスメンバ4の底部とガセット部材17の底部とに支持されている。
すなわち、図1、図5、図7に示すようにクロスメンバ4の閉断面5内には取付け孔25に対応して、予めナット27を接合固定する一方、ガセット部材17の閉断面19内には取付け孔24,24に対応して予めナット28,28を接合固定し、略U字状部18に沿設すべくクロスメンバ4およびガセット部材17の底部に配置したブラケット20の下方からボルト29,30,30を上述のナット27,28,29に締付けることで、該ブラケット20をクロスメンバ4に1点で支持し、ガセット部材17に2点で支持させている。
【0032】
上述のダンパ部材11(いわゆるショックアブソーバ)は図7に示すように、内部に衝撃緩衝機能を有すると共に、外筒31、内筒32、アッパアイ33、ロアアイ34および上下のダンパ支持ピン(ダンパ支持軸)35,36を備えている。
【0033】
上述のダンパ部材11はリヤフロアパネル1の下側において、図1、図7に示す如く、その上部が車幅方向内方で、かつ車両前方となるように傾斜配設されている。
【0034】
つまり、上側のダンパ支持ピン35はブラケット20の立設片23における取付け孔26に支持され、下側のダンパ支持ピン36はリヤサスペンション6を構成するトレーリングアーム7のダンパ部材取付け部7cに支持されている。なお、図中符号Fは車両の前方向を示す。
【0035】
このように上記実施例の自動車の後部車体構造は、車両の前後方向に沿ってほぼ直線状に配置された左右のリヤサイドフレーム2,2を設け、上記左右のリヤサイドフレーム2,2間に車幅方向に延びるクロスメンバ4を接続すると共に、上記クロスメンバ4と上記リヤサイドフレーム2とをガセット部材17で連結し、上記ガセット部材17にリヤサスペンション6のダンパ部材11を支持させたものである。
この構成によれば、上述のガセット部材17にダンパ部材11を支持させたので、このダンパ部材11をリヤフロア下側にレイアウトすることができて、左右のタイヤハウス間のスペースを広く設定することができ、この結果、荷室スペースの拡大を図ることができる。
【0036】
また、上述のダンパ部材11はリヤリヤフロアパネル1に取付けることなく、上記ガセット部材17に支持させるので、リヤフロアのシール性などの問題は発生しない。
しかも、クロスメンバ4とリヤサイドフレーム2とをガセット部材17で連結したので、クロスメンバ4とリヤサイドフレーム2との結合部分の剛性を上述のガセット部材17にて向上させることができるうえ、ダンパ部材11の支持剛性向上を図ることができる。
【0037】
さらに、上記ガセット部材17とクロスメンバ4とに架設されたブラケット20を設け、上記ダンパ部材11を該ブラケット20に支持させたものである。
この構成によれば、上記ブラケット20を設けたことにより、ダンパ部材11の支持剛性がさらに向上する。
【0038】
加えて、上記ブラケット20はクロスメンバ4に1点(ボルト29,ナット27参照)で支持されると共に、ガセット部材17に2点(ボルト30,30,ナット28,28参照)で支持されたものである。
この構成によれば、必要最小限の支持点数でもって、ブラケット20をクロスメンバ4およびガセット部材17に強固に支持することができる。
【0039】
また、上記ダンパ部材11はリヤフロアパネル1の下側に配置されたものである。
この構成によれば、ダンパ部材11がリヤフロアパネル1の上側に突出しないので、荷室スペースを何等阻害することなく、加えて、ダンパ部材11がリヤフロアパネル1を貫通する構造でもないので、シール性についても何等問題は発生しない。
【0040】
さらに、上記ダンパ部材11は図1、図2で示したように、その上部が車幅方向内方で、かつ車両前方となるよう傾斜配設されたものである。
この構成によれば、ダンパ部材11を上述のように傾斜配設したので、該ダンパ部材11の配設高さを小さくしつつ、ダンパ部材11のストロークを確保することができる。
【0041】
そのうえ、上記クロスメンバ4の一部と上記ガセット部材17との両者で平面視で略U字状部18が形成され、上記ブラケット20は略U字状部18に沿設するよう上記両者4,7間に支持されたものである。
【0042】
この構成によれば、ダンパ部材11の上部を図7に示すように略U字状部18による空間部分に位置させることができるので、ダンパ部材11の配設スペースを充分に確保しつつ、該ダンパ部材11の支持剛性をより一層向上させることができる。
【0043】
図8は自動車の後部車体構造の参考例を示し、先の実施例ではブラケット20をクロスメンバ4に対して1点で支持し、ガセット部材17に対して2点で支持すべく構成したが、図8に示すこの参考例ではブラケット20におけるフロント側の取付け部22を先の実施例のそれに対して大きく形成し、このブラケット20をクロスメンバ4とガセット部材17とにそれぞれ2点で、すなわち合計4点で支持すべく構成したものである。
【0044】
このように構成すると、ブラケット20それ自体の剛性および取付け強度の向上を図ることができる。なお、図8に示すこの参考例においても、その他の構成、作用、効果については先の実施例とほぼ同様であるから、図8において前図と同一の部分には同一符号を付して、その詳しい説明を省略する。
【0045】
この発明の構成と、上述の実施例との対応において、
この発明のリヤサスペンションは、実施例のマルチリンクタイプのリヤサスペンション6に対応し、
以下同様に、
フロアは、リヤフロアパネル1に対応するも、
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い。
【0046】
【発明の効果】
この発明によれば、車両の前後方向に沿ってほぼ直線状に延びる左右のリヤサイドフレームを設け、これらリヤサイドフレーム間にクロスメンバを接続し、このクロスメンバとリヤサイドフレームとをガセット部材で連結して、該ガセット部材にダンパ部材を支持させると共に、上記ガセット部材とクロスメンバとに架設されたブラケットを設けて、上記ダンパ部材を該ブラケットに支持させ、該ブラケットをクロスメンバに1点で支持させると共に、ガセット部材に2点で支持させて、上記リヤサイドフレームと離間して配設し、上記ダンパ部材をフロアの下側に配置して、上記ガセット部材を上記クロスメンバおよび上記リヤサイドフレームの下縁よりも上方に位置させつつ、上記ガセット部材により上記クロスメンバおよび上記リヤサイドフレームの下縁よりも上方で上記ダンパ部材を支持させ、上記ガセット部材の延設方向と上記ダンパ部材の傾斜方向を同じに設定することで、ダンパ部材をフロア下側にレイアウトすることができて、左右のタイヤハウス間のスペースを広く設定することができて、荷室スペースの拡大を図ることができ、またダンパ部材はリヤフロアに取付けることなく、ガセット部材に支持させることにより、フロアのシール性などの問題が生じないことは勿論、クロスメンバとリヤサイドフレームとの結合部分の剛性を上記ガセット部材にて向上させることができるうえ、ダンパ部材の支持剛性向上を図ることができ、しかも、必要最小限の支持点数でもって、ブラケットをクロスメンバおよびガセット部材に強固に支持することができる効果がある。
【図面の簡単な説明】
【図1】 本発明の自動車の後部車体構造を示す平面図。
【図2】 図1のA−A線矢視断面図。
【図3】 クロスメンバおよびガセット部材の斜視図。
【図4】 サスペンションクロスメンバの平面図。
【図5】 ガセット部材の斜視図。
【図6】 ブラケットの斜視図。
【図7】 図2の要部拡大図。
【図8】 本発明の自動車の後部車体構造の参考例を示す平面図。
【符号の説明】
1…リヤフロアパネル(フロア)
2…リヤサイドフレーム
4…クロスメンバ
6…リヤサスペンション
11…ダンパ部材
17…ガセット部材
18…略U字状部
20…ブラケット
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rear vehicle body structure including left and right rear side frames extending in the front-rear direction of a vehicle and a rear suspension.
[0002]
[Prior art]
Conventionally, as the rear body structure of the automobile of the above-described example, for example, there is one described in JP-A-5-139342.
That is, the portion corresponding to the damper member in the rear side frame is curved inward in the vehicle width direction so as to avoid the damper member of the rear suspension.
[0003]
Thus, if a part of the left and right rear side frames extending in the front-rear direction of the vehicle is curved inward in the vehicle width direction, the distance between these curved parts becomes narrower and the distance between the left and right tire houses becomes narrower. There was a problem that the space for the cargo space was reduced.
[0004]
In order to solve such problems, in the rear vehicle body structure described in Japanese Patent Application Laid-Open No. 8-133133, a concave V-groove is formed on the rear floor, and a rear suspension is formed between the V-groove and the axle hub. The damper member is attached.
[0005]
This configuration has the advantage that the cargo space can be expanded, but it is extremely disadvantageous in terms of sealing performance because the upper end portion of the damper member that is slanted in the outer, inner, and inner heights is attached to the rear floor panel. There was a problem.
[0006]
[Problems to be solved by the invention]
The present invention provides left and right rear side frames extending substantially linearly in the longitudinal direction of the vehicle, connecting a cross member between the rear side frames, connecting the cross member and the rear side frame with a gusset member, Rutotomoni to support the damper member to the gusset member, provided with a bracket that is bridged and the gusset member and the cross member, the damper member is supported by the bracket, with is supported at one point the bracket to the cross member, The gusset member is supported at two points, and is disposed apart from the rear side frame. The damper member is disposed on the lower side of the floor, and the gusset member is positioned below the lower edge of the cross member and the rear side frame. While being positioned upward, the cross member and the rear side frame are moved by the gusset member. Than the lower edge of the over arm is supporting the damper member upwards, the inclination direction of the extending direction and the damper member of said gusset member by setting the same, it is possible to lay the damper member on the floor lower Thus, the space between the left and right tire houses can be set wide, the cargo space can be expanded, and the damper member is not attached to the rear floor, but is supported by the gusset member to seal the floor. of course any problems such as sexual does not occur, after which it is possible to improve the rigidity of the coupling portion between the cross member and the rear side frame in the gusset member, it is possible to support improved rigidity of the damper member, moreover, need with a minimum of support points, the rear wheel of a vehicle bracket can be firmly supported by the cross member and the gusset member And an object thereof is to provide a structure.
[0007]
[Means for Solving the Problems]
The rear vehicle body structure of an automobile according to the present invention includes left and right rear side frames arranged substantially linearly in the longitudinal direction of the vehicle, and connects a cross member between the left and right rear side frames. The rear side frame is connected by a gusset member, the damper member of the rear suspension is supported by the gusset member, a bracket is provided between the gusset member and the cross member, and the damper member is supported by the bracket. The bracket is supported by the cross member at one point and supported by the gusset member at two points, and is disposed apart from the rear side frame. The damper member is disposed below the floor. The gusset member is located above the lower edge of the cross member and the rear side frame. , Than the lower edge of the cross member and the rear side frame and supporting the damper member upwards, in which the inclination direction of the extending direction and the damper member of the gusset member is set to be the same.
The rear suspension configured as described above may be configured as a multi-link suspension.
[0008]
According to the above configuration, since the damper member is supported by the gusset member, the damper member can be laid out on the lower side of the floor, and the space between the left and right tire houses can be set wide. As a result, the cargo space can be expanded.
[0009]
Further, since the above-described damper member is supported by the gusset member without being attached to the rear floor, problems such as floor sealing performance do not occur.
Moreover, since the cross member and the rear side frame are connected by the gusset member, the rigidity of the joint portion between the cross member and the rear side frame can be improved by the above-described gusset member, and the support rigidity of the damper member can be improved. Can do.
[0010]
Further, by providing the bracket, the support rigidity of the damper member is further improved.
[0011]
Further, since the bracket is supported by the cross member at one point and supported by the gusset member at two points, the bracket can be firmly supported by the cross member and the gusset member with the minimum number of support points. it can.
[0012]
In addition, since the damper member is arranged on the lower side of the floor, the damper member does not protrude above the floor, so that it does not obstruct the cargo space, and in addition, the damper member has a structure that penetrates the floor. Since there is no problem, there is no problem with sealing performance.
[0013]
In one embodiment of the present invention, the damper member is inclinedly disposed so that the upper portion is inward in the vehicle width direction and forward of the vehicle.
According to the above configuration, since the damper member is disposed in an inclined manner as described above, the stroke of the damper member can be secured while reducing the arrangement height of the damper member.
[0014]
In one embodiment of the present invention, both the part of the cross member and the gusset member form a substantially U-shaped part in plan view, and the bracket is arranged so that the bracket extends along the substantially U-shaped part. It was supported in between.
[0015]
According to the above configuration, since the upper portion of the damper member can be positioned in the space portion formed by the substantially U-shaped portion, the support rigidity of the damper member is further improved while ensuring a sufficient space for the damper member. Can be made.
[0016]
【Example】
An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show the rear body structure of an automobile. In FIGS. 1 and 2, left and right rear side frames 2 and 2 (provided that the rear floor panel 1 extends in the front-rear direction of the vehicle and is arranged substantially linearly as viewed from the plane. In the drawings, only the right rear side frame is shown for convenience of illustration).
[0017]
The above-described rear side frame 2 has joint flange portions 2a and 2a at the upper portion thereof, and by joining these joint flange portions 2a and 2a to the lower surface of the rear floor panel 1, a closed cross section 3 extending in the front-rear direction of the vehicle is formed. is doing.
[0018]
A cross member 4 extending in the vehicle width direction is connected between the left and right rear side frames 2 and 2, and a closed cross section 5 extending in the vehicle width direction is formed between the cross member 4 and the rear floor panel 1. Yes.
[0019]
As shown in FIG. 3, the cross member 4 has joint flange portions 4a, 4a along the longitudinal direction (vehicle width direction) of the cross member 4 at the front and rear of the upper portion, and the rear side frame 2 at the left and right ends. Joint pieces 4b, 4b, and 4c that are joined to the vertical wall portion and the bottom portion are integrally or integrally formed.
[0020]
By joining the joining flange portions 4a and 4a of the cross member 4 to the lower surface of the rear floor panel 1, the joining pieces 4b and 4b to the vertical wall portion of the rear side frame 2, and the joining piece 4c to the bottom portion of the rear side frame 2, respectively. The cross member 4 is stretched between the left and right rear side frames 2 and 2.
[0021]
On the other hand, a multi-link type rear suspension 6 as shown in FIGS. 1 and 2 is provided.
The rear suspension 6 includes a trailing arm 7, an upper arm 8, a lower arm 9, a lateral link 10, a damper member 11 and a suspension cross member 12 (so-called suspension cross), and independently suspends left and right rear wheels.
[0022]
The above-described trailing arm 7 includes a vehicle body attachment portion 7 a, a lateral link penetration portion 7 b, a damper member attachment portion 7 c, an upper arm attachment portion 7 d, and a lower arm attachment portion 7 e, and the vehicle attachment portion 7 a of the rear side frame 2. It is attached to a predetermined part.
[0023]
As shown in FIG. 4, the suspension cross member 12 is formed by combining a plurality of members 13 to 16, and the left and right ends of the suspension cross member 12 are formed in a bifurcated shape that separates in the longitudinal direction of the vehicle. Yes.
[0024]
A total of four mount portions m1, m2, m3, and m4 provided at the end portions of the above-mentioned bifurcated portion are mounted at predetermined positions on the rear side frames 2 and 2 via rubber mounts.
[0025]
Of the plurality of members 13 to 16 described above, the member 16 is set as an upper arm bracket, and the upper arm bracket 16 supports the vehicle arm inner side end of the upper arm 8 in a swingable manner.
[0026]
As shown in FIGS. 1 and 3, the cross member 4 extending in the vehicle width direction and the rear side frame 2 extending in the front-rear direction of the vehicle are connected by a gusset member 17, as shown in FIGS. A substantially U-shaped portion 18 is formed in plan view by both the end side portion of the cross member 4 and the gusset member 17.
[0027]
As shown in FIG. 5, the gusset member 17 has joint flange portions 17a and 17a joined to the rear floor panel 1 at the front and rear of the upper portion thereof, and the vertical wall portion and the bottom portion of the rear side frame 2 at the vehicle outer end portion. The joining pieces 17b and 17c to be joined are integrally formed, and the joining pieces 17d and 17e to be joined to the vertical wall portion and the side portion of the cross member 4 are integrally formed at the vehicle inner end portion.
[0028]
Then, the joining flange portions 17a and 17a of the gusset member 17 are joined to the lower surfaces of the joining flange portions 4a of the rear floor panel 1 and the cross member 4 to form a closed section 19 (see FIG. 2). The piece 17b is joined to the vertical wall portion of the rear side frame 2, the joining piece 17c is joined to the bottom portion of the rear side frame 2, the joining piece 17d is joined to the vertical wall portion of the cross member 4, and the joining piece 17e is joined to the bottom portion of the cross member 4. Thus, the gusset member 17 is attached between the cross member 4 and the rear side frame 2.
Moreover, as shown in FIGS. 1 and 2, a bracket 20 is provided between the gusset member 17 and the cross member 4 described above.
[0029]
As shown in FIG. 6, the bracket 20 described above is attached to the bottom of the gusset member 17 and has a rear-side mounting portion 21 with a cross-sectional gate shape and a front-side mounting portion 22 with a cross-sectional portal shape to be attached to the bottom portion of the cross member 4. And a substantially U-shaped standing piece 23 that rises upward from the mounting portion 21 described above, and is a reinforcing member that is integrally or integrally formed. In this embodiment, the front side mounting portion 21 is attached to the rear side mounting portion 21. The part 22 is configured to be lower by a predetermined amount.
[0030]
A total of two mounting holes 24, 24 are formed in the above-described rear-side mounting portion 21, and one mounting hole 25 is formed in the front-side mounting side 22. Are formed with mounting holes 26 and 26 for attaching the upper portion of the damper member 11.
[0031]
The bracket 20 described above is supported by the bottom of the cross member 4 and the bottom of the gusset member 17 so as to extend along the substantially U-shaped portion 18 as shown in a plan view in FIG.
That is, as shown in FIGS. 1, 5, and 7, the nut 27 is joined and fixed in advance in the closed cross section 5 of the cross member 4 corresponding to the attachment hole 25, while the gusset member 17 is in the closed cross section 19. The nuts 28 and 28 are joined and fixed in advance corresponding to the mounting holes 24 and 24, and bolts 29 are provided from below the bracket 20 disposed at the bottom of the cross member 4 and the gusset member 17 so as to extend along the substantially U-shaped portion 18. , 30 and 30 are fastened to the nuts 27, 28 and 29, so that the bracket 20 is supported on the cross member 4 at one point and the gusset member 17 is supported at two points.
[0032]
As shown in FIG. 7, the above-described damper member 11 (so-called shock absorber) has an impact buffering function inside, as well as an outer cylinder 31, an inner cylinder 32, an upper eye 33, a lower eye 34, and upper and lower damper support pins (damper support shafts). ) 35, 36.
[0033]
As shown in FIGS. 1 and 7, the above-described damper member 11 is inclined on the lower side of the rear floor panel 1 so that the upper portion is inward in the vehicle width direction and forward of the vehicle.
[0034]
That is, the upper damper support pin 35 is supported by the mounting hole 26 in the standing piece 23 of the bracket 20, and the lower damper support pin 36 is supported by the damper member mounting portion 7 c of the trailing arm 7 constituting the rear suspension 6. Has been. In addition, the code | symbol F in a figure shows the front direction of a vehicle.
[0035]
As described above, the rear vehicle body structure of the automobile of the above embodiment is provided with the left and right rear side frames 2 and 2 arranged substantially linearly in the longitudinal direction of the vehicle, and the vehicle width between the left and right rear side frames 2 and 2. The cross member 4 extending in the direction is connected, and the cross member 4 and the rear side frame 2 are coupled by a gusset member 17, and the damper member 11 of the rear suspension 6 is supported by the gusset member 17.
According to this configuration, since the damper member 11 is supported by the gusset member 17 described above, the damper member 11 can be laid out on the lower side of the rear floor, and the space between the left and right tire houses can be set wide. As a result, the cargo space can be expanded.
[0036]
Further, since the above-described damper member 11 is supported by the gusset member 17 without being attached to the rear rear floor panel 1, problems such as sealing performance of the rear floor do not occur.
In addition, since the cross member 4 and the rear side frame 2 are connected by the gusset member 17, the rigidity of the joint portion between the cross member 4 and the rear side frame 2 can be improved by the gusset member 17, and the damper member 11. The support rigidity can be improved.
[0037]
Furthermore, a bracket 20 is provided between the gusset member 17 and the cross member 4, and the damper member 11 is supported by the bracket 20.
According to this configuration, the support rigidity of the damper member 11 is further improved by providing the bracket 20.
[0038]
In addition, the bracket 20 is supported by the cross member 4 at one point (see bolts 29 and nuts 27) and supported by the gusset member 17 at two points (see bolts 30 and 30 and nuts 28 and 28). It is.
According to this configuration, the bracket 20 can be firmly supported by the cross member 4 and the gusset member 17 with the minimum number of support points.
[0039]
The damper member 11 is disposed below the rear floor panel 1.
According to this configuration, since the damper member 11 does not protrude above the rear floor panel 1, it does not obstruct the cargo space, and in addition, the damper member 11 does not have a structure that penetrates the rear floor panel 1. There will be no problem.
[0040]
Further, as shown in FIGS. 1 and 2, the damper member 11 is inclined so that the upper portion is inward in the vehicle width direction and forward of the vehicle.
According to this configuration, since the damper member 11 is disposed as described above, the stroke of the damper member 11 can be ensured while the height of the damper member 11 is reduced.
[0041]
In addition, a substantially U-shaped portion 18 is formed in a plan view by both a part of the cross member 4 and the gusset member 17, and the bracket 20 is arranged so as to be along the substantially U-shaped portion 18. 7 is supported.
[0042]
According to this configuration, the upper portion of the damper member 11 can be positioned in the space portion by the substantially U-shaped portion 18 as shown in FIG. The support rigidity of the damper member 11 can be further improved.
[0043]
FIG. 8 shows a reference example of the rear body structure of an automobile. In the previous embodiment, the bracket 20 is supported at one point with respect to the cross member 4 and is configured to be supported at two points with respect to the gusset member 17. In this reference example shown in FIG. 8, the mounting portion 22 on the front side of the bracket 20 is formed larger than that of the previous embodiment, and the bracket 20 is formed on the cross member 4 and the gusset member 17 at two points, that is, in total. It is configured to support at 4 points.
[0044]
If comprised in this way, the improvement of the rigidity and attachment strength of bracket 20 itself can be aimed at. In this reference example shown in FIG. 8 as well, the other configurations, operations, and effects are almost the same as those of the previous embodiment. Therefore, in FIG. Detailed description thereof is omitted.
[0045]
In the correspondence between the configuration of the present invention and the above-described embodiment,
The rear suspension of the present invention corresponds to the multi-link type rear suspension 6 of the embodiment,
Similarly,
The floor corresponds to the rear floor panel 1,
The present invention is not limited to the configuration of the above-described embodiment.
[0046]
【The invention's effect】
According to the present invention, the left and right rear side frames extending substantially linearly along the longitudinal direction of the vehicle are provided, the cross member is connected between the rear side frames, and the cross member and the rear side frame are connected by the gusset member. , Rutotomoni to support the damper member to the gusset member, provided with a bridging has been bracket and the gusset member and the cross member, the damper member is supported by the bracket, it is supported at one point the bracket to the cross member In addition, the gusset member is supported at two points and is spaced apart from the rear side frame. The damper member is disposed on the lower side of the floor. The gusset member is attached to the lower edge of the cross member and the rear side frame. The cross member and the rear support by the gusset member. Than the lower edge of the lead frame by supporting the damper member upwards, the inclination direction of the extending direction and the damper member of said gusset member by setting the same, it is possible to lay the damper member on the floor lower Thus, the space between the left and right tire houses can be set wide, the cargo space can be expanded, and the damper member is not attached to the rear floor, but is supported by the gusset member to seal the floor. of course any problems such as sexual does not occur, after which it is possible to improve the rigidity of the coupling portion between the cross member and the rear side frame in the gusset member, it is possible to support improved rigidity of the damper member, moreover, need With the minimum number of support points, the bracket can be firmly supported by the cross member and the gusset member. .
[Brief description of the drawings]
FIG. 1 is a plan view showing a rear body structure of an automobile according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a perspective view of a cross member and a gusset member.
FIG. 4 is a plan view of a suspension cross member.
FIG. 5 is a perspective view of a gusset member.
FIG. 6 is a perspective view of a bracket.
FIG. 7 is an enlarged view of a main part of FIG.
FIG. 8 is a plan view showing a reference example of a rear body structure of an automobile according to the present invention.
[Explanation of symbols]
1 ... Rear floor panel (floor)
2 ... Rear side frame 4 ... Cross member 6 ... Rear suspension 11 ... Damper member 17 ... Gusset member 18 ... Substantially U-shaped part 20 ... Bracket

Claims (3)

車両の前後方向に沿ってほぼ直線状に配置された左右のリヤサイドフレームを設け、
上記左右のリヤサイドフレーム間にクロスメンバを接続すると共に、
上記クロスメンバと上記リヤサイドフレームとをガセット部材で連結し、
上記ガセット部材にリヤサスペンションのダンパ部材を支持させ
上記ガセット部材とクロスメンバとに架設されたブラケットを設けて、
上記ダンパ部材を該ブラケットに支持させており、
該ブラケットはクロスメンバに1点で支持されると共に、ガセット部材に2点で支持され、
上記リヤサイドフレームと離間して配設されており、
上記ダンパ部材はフロアの下側に配置され、
上記ガセット部材が上記クロスメンバおよび上記リヤサイドフレームの下縁よりも上方に位置し、上記クロスメンバおよび上記リヤサイドフレームの下縁よりも上方で上記ダンパ部材を支持しており、
上記ガセット部材の延設方向と上記ダンパ部材の傾斜方向が同じに設定された
自動車の後部車体構造。
Provide left and right rear side frames that are arranged almost linearly in the longitudinal direction of the vehicle,
While connecting a cross member between the left and right rear side frames,
The cross member and the rear side frame are connected by a gusset member,
Support the damper member of the rear suspension to the gusset member ,
Provide a bracket erected on the gusset member and cross member,
The damper member is supported on the bracket,
The bracket is supported at one point on the cross member and supported at two points on the gusset member.
It is spaced apart from the rear side frame,
The damper member is disposed below the floor,
The gusset member is positioned above the lower edge of the cross member and the rear side frame, and supports the damper member above the lower edge of the cross member and the rear side frame;
The rear body structure of an automobile in which the extending direction of the gusset member and the inclination direction of the damper member are set to be the same .
上記ダンパ部材はその上部が車幅方向内方で、かつ車両前方となるよう傾斜配設された
請求項1記載の自動車の後部車体構造。
The damper member is inclined so that the upper part is inward in the vehicle width direction and in front of the vehicle.
The rear body structure of an automobile according to claim 1 .
上記クロスメンバの一部と上記ガセット部材との両者で平面視で略U字状部が形成され、
上記ブラケットは略U字状部に沿設するよう上記両者間に支持された
請求項1記載の自動車の後部車体構造。
A substantially U-shaped part is formed in a plan view in both the part of the cross member and the gusset member,
The bracket was supported between the two so as to extend along a substantially U-shaped portion.
The rear body structure of an automobile according to claim 1 .
JP2001240180A 2001-08-08 2001-08-08 Rear body structure of automobile Expired - Fee Related JP4734797B2 (en)

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JP4670280B2 (en) * 2004-08-25 2011-04-13 マツダ株式会社 Rear body structure of automobile
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