JP2008062695A - Vehicle body rear structure - Google Patents

Vehicle body rear structure Download PDF

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JP2008062695A
JP2008062695A JP2006240162A JP2006240162A JP2008062695A JP 2008062695 A JP2008062695 A JP 2008062695A JP 2006240162 A JP2006240162 A JP 2006240162A JP 2006240162 A JP2006240162 A JP 2006240162A JP 2008062695 A JP2008062695 A JP 2008062695A
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vehicle
upper wall
rear side
side member
reinforcement
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JP4876801B2 (en
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Yuya Adachi
祐也 足立
Katsumi Morita
勝己 森田
Kaori Kawaguchi
香里 川口
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body rear structure capable of improving load absorption balance by a side member by approximately equally inputting a load from a vehicle rear side from the upper end of the side member to the lower end thereof while lowering the lower edge of a back door opening to enlarge its opening area. <P>SOLUTION: The upper wall 11 of a reinforcement 10 is offset lower than the upper end of a rear side member 1, thereby the upper wall 2u of a tail cross member 2 positioned above the reinforcement 10 is lowered to enlarge the opening area of the door opening 5, and unloading of load is facilitated by lowering of the lower edge of the back door opening 5. Since an erected flange section 14 formed on the vehicle front end of the upper wall 11 of the reinforcement 10 is connected to the front wall 2f of the tail cross member 2, vehicle rear load is transmitted to the upper part of the rear side member 1 through the erected flange part 14, and load absorption balance by the rear side member 1 is improved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、車体の後部構造に関し、とりわけ、リヤサイドメンバの後端の延長上にレインフォースが車両後方に突出して配設された車体の後部構造に関する。   The present invention relates to a rear structure of a vehicle body, and in particular, relates to a rear structure of a vehicle body in which a reinforcement is provided on the extension of the rear end of a rear side member so as to protrude rearward of the vehicle.

フロアパネルの後部下面には、車幅方向両側に車両前後方向に延在する左右一対のリヤサイドメンバが配設されており、これらリヤサイドメンバは、フロアパネル後端に接合されて車幅方向に延在するクロスメンバの前壁に結合されている。   A pair of left and right rear side members extending in the vehicle front-rear direction are arranged on both sides in the vehicle width direction on the rear lower surface of the floor panel, and these rear side members are joined to the rear end of the floor panel and extend in the vehicle width direction. It is connected to the front wall of the existing cross member.

前記リヤサイドメンバおよび前記クロスメンバはそれぞれ閉断面に形成され、このクロスメンバの内部にはリヤサイドメンバの延長上にレインフォースを配置して、該レインフォースをクロスメンバの前壁に接合して車両後方に突出させてあり、つまり、レインフォースはリヤサイドメンバの後端から連続して突出する形状となり、リヤバンパーから入力される後面衝突荷重を前記レインフォースを介してリヤサイドメンバの長手方向に効率良く入力させるようになっている。   The rear side member and the cross member are each formed in a closed cross section, and a reinforcement is disposed on the extension of the rear side member inside the cross member, and the reinforcement is joined to the front wall of the cross member to rearward the vehicle. In other words, the reinforcement has a shape that protrudes continuously from the rear end of the rear side member, and the rear collision load input from the rear bumper is efficiently input in the longitudinal direction of the rear side member through the reinforcement. It is supposed to let you.

前記レインフォースは、上壁とその上壁の車幅方向両側から垂下された両側壁とによって断面逆U字状に形成されたレインフォースアッパを備えて構成されている(例えば、特許文献1参照)。
特開平10−316051号公報(第3頁、第1−2図)
The said reinforcement is comprised including the reinforcement upper part formed in the cross-section reverse U-shape by the upper wall and the both side walls suspended from the vehicle width direction both sides of the upper wall (for example, refer patent document 1). ).
Japanese Patent Laid-Open No. 10-316051 (page 3, FIG. 1-2)

しかしながら、かかる従来の車体の後部構造にあっては、レインフォースアッパの上壁が閉断面に形成されたリヤサイドメンバの上壁と略一致するようにしてレインフォースを結合してあるため、該レインフォースを内部に配置したクロスメンバの上壁は必然的にリヤサイドメンバの上壁よりも高位置となる。   However, in such a conventional rear structure of the vehicle body, the reinforcement is coupled so that the upper wall of the reinforcement upper portion is substantially coincident with the upper wall of the rear side member formed in the closed cross section. The upper wall of the cross member in which the force is disposed is necessarily higher than the upper wall of the rear side member.

このため、前記クロスメンバの上壁が下縁となるバックドア開口部の開口面積を大きくすることが不可能となり、また、このようにバックドア開口部の下縁が高くなることにより荷物の積み下ろしが困難になってしまう。   For this reason, it is impossible to increase the opening area of the back door opening portion where the upper wall of the cross member is the lower edge, and the lower edge of the back door opening portion becomes higher in this way, thereby loading and unloading luggage. Will become difficult.

一方、バックドア開口部の下縁を低くするために、単にレインフォースをリヤサイドメンバの上壁よりも下方に下げて取り付けると、レインフォースに入力された後面衝突荷重はリヤサイドメンバの下部に集中するため、リヤサイドメンバによる衝突荷重の吸収バランスが悪化して、衝突による衝撃吸収効率が低下してしまう。   On the other hand, if the reinforcement is simply lowered below the upper wall of the rear side member in order to lower the lower edge of the back door opening, the rear collision load input to the reinforcement concentrates on the lower part of the rear side member. Therefore, the absorption balance of the collision load by the rear side member is deteriorated, and the shock absorption efficiency due to the collision is lowered.

そこで、本発明は、バックドア開口部の下縁を下げてその開口面積を大きくしつつ、車両後方からの荷重をリヤサイドメンバの上端から下端まで略均等に入力させて、リヤサイドメンバによる荷重の吸収バランスを向上できる車両の後部構造を提供するものである。   Therefore, the present invention lowers the lower edge of the back door opening to increase the opening area, and allows the load from the rear of the vehicle to be input substantially evenly from the upper end to the lower end of the rear side member to absorb the load by the rear side member. A rear structure of a vehicle capable of improving the balance is provided.

本発明にあっては、フロアパネルの下面に接合されて車両前後方向に延在するリヤサイドメンバと、フロアパネルおよびリヤサイドメンバの後端に結合されて車幅方向に延在する閉断面構造のクロスメンバと、少なくとも上壁とこの上壁の車幅方向両側から垂下された両側壁とを有し、前記クロスメンバの内部に配置されて、リヤサイドメンバの延長上でクロスメンバの前壁に結合され、車両後方に突出するレインフォースと、を備えた車体の後部構造において、前記レインフォースの上壁を前記リヤサイドメンバの上端位置よりも下方に所定量オフセットして配置するとともに、該レインフォースの上壁の車両前方端部に、上方に立ち上がって前記クロスメンバの前壁に接合される起立フランジ部を形成したことを最も主要な特徴とする。   In the present invention, a rear side member joined to the lower surface of the floor panel and extending in the vehicle front-rear direction, and a cross having a closed cross-section structure joined to the rear ends of the floor panel and the rear side member and extended in the vehicle width direction A member, and at least an upper wall and both side walls suspended from both sides of the upper wall in the vehicle width direction, disposed inside the cross member, and coupled to the front wall of the cross member on an extension of the rear side member A rear portion of the vehicle body having a reinforcement projecting rearward of the vehicle, wherein the upper wall of the reinforcement is disposed with a predetermined amount offset below the upper end position of the rear side member, The most important feature is that an upstanding flange portion that rises upward and is joined to the front wall of the cross member is formed at the vehicle front end portion of the wall.

本発明によれば、リヤサイドメンバの後端から車両後方に突出するレインフォースの上壁を、リヤサイドメンバの上端よりも下方に所定量オフセットして配置したので、レインフォースを内蔵したクロスメンバの上壁の地上高を下げることができ、ひいては、該上壁が下縁となるバックドア開口部の開口面積を大きく取ることができるとともに、該バックドア開口部の下縁の地上高が下がることにより荷物の積み下ろしが容易になる。   According to the present invention, since the upper wall of the reinforcement projecting rearward from the rear end of the rear side member is disposed below the upper end of the rear side member by a predetermined amount, the upper wall of the cross member incorporating the reinforcement is disposed. The ground clearance of the wall can be lowered, and as a result, the opening area of the back door opening where the upper wall becomes the lower edge can be increased, and the ground clearance of the lower edge of the back door opening can be lowered. Easy loading and unloading of luggage.

また、このようにレインフォースの上壁を下げた場合でも、該上壁の車両前方端部に上方に立ち上がる起立フランジ部を形成して、該起立フランジ部をクロスメンバの前壁に接合したので、車両後方から入力される荷重が前記レインフォースを介してリヤサイドメンバに伝達される際に、この荷重は前記起立フランジ部を介してリヤサイドメンバの上部にも伝達することができるので、リヤサイドメンバには上端から下端まで略均等に荷重が入力されて、リヤサイドメンバによる荷重の吸収バランスを向上させることができ、ひいては、リヤサイドメンバによる荷重吸収効率を向上することができる。   Even when the upper wall of the reinforcement is lowered in this way, a standing flange portion that rises upward is formed at the vehicle front end portion of the upper wall, and the standing flange portion is joined to the front wall of the cross member. When the load input from the rear of the vehicle is transmitted to the rear side member via the reinforcement, the load can be transmitted to the upper portion of the rear side member via the standing flange portion. The load is input substantially evenly from the upper end to the lower end, so that the load absorption balance by the rear side member can be improved, and consequently the load absorption efficiency by the rear side member can be improved.

以下、本発明の実施形態を図面と共に詳述する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図1〜図3は本発明にかかる車両の後部構造の第1実施形態を示し、図1は車体右側後部の骨格構造を示す斜視図、図2は図1中A−A線に沿った断面図、図3はレインフォースの斜視図である。   1 to 3 show a first embodiment of a rear structure of a vehicle according to the present invention, FIG. 1 is a perspective view showing a skeleton structure of a right rear portion of a vehicle body, and FIG. 3 and 3 are perspective views of the reinforcement.

本実施形態の車両の後部構造は、図1に示すようにフロアパネル3の下面に接合されて車幅方向両側に配置されるリヤサイドメンバ1の後部に適用され、該リヤサイドメンバ1は車両前後方向に延在し、フロアパネル3の後端およびリヤサイドメンバ1の後端に閉断面構造のクロスメンバ、つまりテールクロスメンバ2が結合される。   The rear structure of the vehicle according to the present embodiment is applied to a rear portion of a rear side member 1 that is joined to the lower surface of the floor panel 3 and disposed on both sides in the vehicle width direction as shown in FIG. A cross member having a closed cross-sectional structure, that is, a tail cross member 2 is coupled to the rear end of the floor panel 3 and the rear end of the rear side member 1.

リヤサイドメンバ1は上方が開放されたハット形断面に形成され、その上端部両側に設けられたフランジ1aをフロアパネル3の下面に接合することにより、フロアパネル3とリヤサイドメンバ1とで略矩形状の閉断面を構成している。   The rear side member 1 is formed in a hat-shaped cross section with its upper part open, and the floor panel 3 and the rear side member 1 have a substantially rectangular shape by joining flanges 1 a provided on both sides of the upper end portion to the lower surface of the floor panel 3. The closed cross section is configured.

前記テールクロスメンバ2は、図2に示すように上壁2uと前壁2fとによって断面逆L字状に形成されたフロントパネル2Aと、底壁2bと後壁2rとによって断面L字状に形成されたリヤパネル2Bとを、それぞれの両側部に設けたフランジ2Af,2Bfを相互に接合することにより略矩形状の閉断面に形成されている。   As shown in FIG. 2, the tail cross member 2 has a front panel 2A formed in an inverted L-shaped section by an upper wall 2u and a front wall 2f, and a L-shaped section by a bottom wall 2b and a rear wall 2r. The formed rear panel 2B is formed into a substantially rectangular closed cross section by joining flanges 2Af and 2Bf provided on both side portions to each other.

前記テールクロスメンバ2は、その上下方向寸法h1がリヤサイドメンバ1の上下方向寸法h2よりも長く形成されており、テールクロスメンバ2の前壁2fの前面上部がリヤサイドメンバ1の後端1rに接合され、テールクロスメンバ2の上壁2uとリヤサイドメンバ1の上端、つまりフロアパネル3との高さを略一致させてある。   The tail cross member 2 is formed such that its vertical dimension h1 is longer than the vertical dimension h2 of the rear side member 1, and the front upper portion of the front wall 2f of the tail cross member 2 is joined to the rear end 1r of the rear side member 1. In addition, the height of the upper wall 2u of the tail cross member 2 and the upper end of the rear side member 1, that is, the floor panel 3, is substantially matched.

また、前記テールクロスメンバ2の車幅方向両端部には左右一対のバックピラー4が立設され、テールクロスメンバ2と、バックピラー4と、これら一対のバックピラー4の上端部に跨って連結される図示省略したリヤルーフレールとによって、前記テールクロスメンバ2の上壁2uを下縁とするバックドア開口部5が形成される。   Further, a pair of left and right back pillars 4 are erected on both ends of the tail cross member 2 in the vehicle width direction, and are connected across the tail cross member 2, the back pillar 4, and the upper ends of the pair of back pillars 4. The rear roof rail (not shown) forms a back door opening 5 having the upper wall 2u of the tail cross member 2 as a lower edge.

前記バックピラー4は、前記テールクロスメンバ2と同様に断面略矩形状の閉断面に形成されるが、図1,図2ではその閉断面を形成するバックピラー4のインナプレート基部4Aのみが示されており、このインナプレート基部4Aに図示省略した一般部分となるインナプレートが上方に向かって一体に接合され、これらインナプレートの外側に閉断面を形成するようにアウタープレートが接合されることにより、前記閉断面構造のバックピラー4が形成される。   The back pillar 4 is formed in a closed cross section having a substantially rectangular cross section like the tail cross member 2, but only the inner plate base portion 4A of the back pillar 4 forming the closed cross section is shown in FIGS. The inner plate, which is a general part (not shown), is integrally joined upward to the inner plate base 4A, and the outer plate is joined so as to form a closed cross section outside the inner plate. The back pillar 4 having the closed cross-sectional structure is formed.

前記テールクロスメンバ2の内部には、車両後方からの荷重、例えば後面衝突荷重をテールクロスメンバ2の潰れを抑制して効率よくリヤサイドメンバ1に伝達するためのレインフォース10が設けられる。   Inside the tail cross member 2 is provided a rain force 10 for efficiently transmitting a load from the rear of the vehicle, for example, a rear collision load, to the rear side member 1 while preventing the tail cross member 2 from being crushed.

前記レインフォース10は、図3に示すように上壁11とこの上壁11の車幅方向両側から垂下された両側壁12,13とを備えて断面略逆U字状に形成され、両側壁12,13の車両前端部をそれぞれ車幅方向外方に折曲して取付フランジ12a,13aが形成されているとともに、上壁11および両側壁12,13の車両後端部は、それぞれで囲まれる内方に所定幅をもって折曲されて荷重受け面11a,12b,13bが形成されている。   As shown in FIG. 3, the reinforcement 10 includes an upper wall 11 and both side walls 12 and 13 suspended from both sides of the upper wall 11 in the vehicle width direction. The vehicle front end portions 12 and 13 are bent outward in the vehicle width direction to form mounting flanges 12a and 13a, respectively, and the vehicle rear end portions of the upper wall 11 and the side walls 12 and 13 are surrounded by each. Load receiving surfaces 11a, 12b, and 13b are formed by being bent inward with a predetermined width.

そして、前記レインフォース10は、図1,図2に示すようにリヤサイドメンバ1の延長上に位置させて、取付フランジ12a,13aをクロスメンバ10の前壁2fに結合することにより、レインフォース10はリヤサイドメンバ1の後端から車両後方に向かって突出されている。   The reinforcement 10 is positioned on the extension of the rear side member 1 as shown in FIGS. 1 and 2, and the attachment flanges 12 a and 13 a are coupled to the front wall 2 f of the cross member 10. Is projected from the rear end of the rear side member 1 toward the rear of the vehicle.

レインフォース10の前端に設けた荷重受け面11a,12b,13bと、テールクロスメンバ2の後壁2rとの間には適宜間隔が設けられており、かつ、テールクロスメンバ2の車両後側は図示省略したリヤバンパーのバンパーフェイシャで覆われ、後面衝突時はその時の入力荷重でバンパーフェイシャおよびテールクロスメンバ2の後壁2rを変形し、この後壁2rが前記荷重受け面11a,12b,13bに当接した後は、レインフォース10を介してリヤサイドメンバ1に荷重伝達されるようになっている。   An appropriate space is provided between the load receiving surfaces 11a, 12b, 13b provided at the front end of the reinforcement 10 and the rear wall 2r of the tail cross member 2, and the rear side of the tail cross member 2 in the vehicle is The rear bumper is covered with a bumper fascia of a rear bumper (not shown), and at the time of a rear collision, the rear wall 2r of the bumper fascia and the tail cross member 2 is deformed by the input load at that time. After the contact, the load is transmitted to the rear side member 1 through the reinforcement 10.

ここで、本発明は、前記レインフォース10の上壁11を前記リヤサイドメンバ1の上端、つまり、フロアパネル3よりも下方に所定量αをもってオフセットして配置してあり、このレインフォース10の上壁11の車両前方端部には、上方に立ち上がって前記テールクロスメンバ2の前壁2fに接合される起立フランジ部14を形成してある。   Here, according to the present invention, the upper wall 11 of the reinforcement 10 is offset with a predetermined amount α below the upper end of the rear side member 1, that is, below the floor panel 3. A standing flange portion 14 that rises upward and is joined to the front wall 2 f of the tail cross member 2 is formed at the vehicle front end portion of the wall 11.

また、本実施形態ではレインフォース10の前記上壁11の後端から前記起立フランジ部14の上端に亘って連続するビード20を設けてある。   Further, in the present embodiment, a bead 20 that is continuous from the rear end of the upper wall 11 of the reinforcement 10 to the upper end of the upright flange portion 14 is provided.

このビード20は、上壁11では上方に膨出されているとともに、起立フランジ部14では車両後方に膨出されている。   The bead 20 bulges upward on the upper wall 11 and bulges rearward of the vehicle at the standing flange portion 14.

つまり、前記ビード20は、上壁11では上方に膨出されることにより、その上壁11の下面には車両前後方向に延びる溝部20aが形成されるとともに、起立フランジ部14では車両後方に膨出されることにより、起立フランジ部14の前面には上下方向に延びる溝部20bが形成され、これら両溝部20a,20bは互いに連続されており、かつ、起立フランジ部14がテールクロスメンバ2の前壁2fに結合された状態で前記溝部20bの上端は上方に解放される。   That is, the bead 20 bulges upward on the upper wall 11, thereby forming a groove 20 a extending in the vehicle front-rear direction on the lower surface of the upper wall 11, and bulges rearward of the vehicle at the standing flange 14. As a result, a groove portion 20b extending in the vertical direction is formed on the front surface of the upright flange portion 14, the two groove portions 20a and 20b are continuous with each other, and the upright flange portion 14 is connected to the front wall 2f of the tail cross member 2. In this state, the upper end of the groove 20b is released upward.

また、本実施形態では前記ビード20は、上壁11および起立フランジ14の車幅方向略中央部に形成されている。   In the present embodiment, the bead 20 is formed at the substantially central portion of the upper wall 11 and the upright flange 14 in the vehicle width direction.

更に、レインフォース10の前記両側壁12,13は、それらの下辺12c,13cを車両後方に向かって上方に傾斜して形成してある。   Further, the both side walls 12 and 13 of the reinforcement 10 are formed such that their lower sides 12c and 13c are inclined upward toward the rear of the vehicle.

つまり、前記レインフォース10は、上壁11が路面と略平行となっており、その上壁11に対して前記両側壁12,13は車両後方に向かって先細りの形状となっている。   That is, in the reinforcement 10, the upper wall 11 is substantially parallel to the road surface, and the side walls 12 and 13 are tapered toward the rear of the vehicle with respect to the upper wall 11.

以上の構成により本実施形態の車体の後部構造によれば、閉断面構造のテールクロスメンバ2の内部に設けたレインフォース10が、リヤサイドメンバ1の延長上に配置されているので、レインフォース10に入力された後面衝突荷重を効率良くリヤサイドメンバ1に伝達できる。   With the above configuration, according to the rear structure of the vehicle body of the present embodiment, the reinforcement 10 provided inside the tail cross member 2 having a closed cross-sectional structure is disposed on the extension of the rear side member 1. Can be transmitted to the rear side member 1 efficiently.

このとき、レインフォース10の上壁11を、リヤサイドメンバ1の上端となるフロアパネル3よりも下方に所定量αをもってオフセットして配置したので、このレインフォース10の上方に位置するテールクロスメンバ2の上壁2uの地上高を下げることができる。   At this time, since the upper wall 11 of the reinforcement 10 is arranged with a predetermined amount α offset below the floor panel 3 that is the upper end of the rear side member 1, the tail cross member 2 positioned above the reinforcement 10 is disposed. The ground clearance of the upper wall 2u can be lowered.

従って、本実施形態では前記上壁2uをリヤサイドメンバ1の上端となるフロアパネル3と略等しい高さにして、その上壁2uが下縁となるバックドア開口部5の開口面積を大きく取ることができるとともに、このバックドア開口部5の下縁が下がることにより荷物の積み下ろしが容易になる。   Therefore, in the present embodiment, the upper wall 2u is made substantially equal in height to the floor panel 3 which is the upper end of the rear side member 1, and the opening area of the back door opening 5 where the upper wall 2u is the lower edge is increased. And lowering the lower edge of the back door opening 5 facilitates loading and unloading of luggage.

また、このようにレインフォース10の上壁11を下げた場合でも、この上壁11の車両前方端部に形成した起立フランジ部14をテールクロスメンバ2の前壁2fに接合したので、車両後方から入力される荷重が前記レインフォース10を介してリヤサイドメンバ1に伝達される際に、この荷重は前記起立フランジ部14を介してリヤサイドメンバ1の上部にも伝達することができるので、リヤサイドメンバ1には上端から下端まで略均等に荷重が入力されて、リヤサイドメンバ1による荷重の吸収バランスを向上させることができ、ひいては、リヤサイドメンバ1による荷重吸収効率を向上することができる。   Even when the upper wall 11 of the reinforcement 10 is lowered as described above, the upright flange portion 14 formed at the vehicle front end portion of the upper wall 11 is joined to the front wall 2 f of the tail cross member 2. When the load input from the rear side member 1 is transmitted to the rear side member 1 through the reinforcement 10, the load can be transmitted to the upper portion of the rear side member 1 through the standing flange portion 14. 1, the load is input substantially evenly from the upper end to the lower end, so that the load absorption balance by the rear side member 1 can be improved. As a result, the load absorption efficiency by the rear side member 1 can be improved.

また、本実施形態ではレインフォース10の上壁11の後端から起立フランジ部14の上端に亘って連続するビード20を設けたので、レインフォース10の上壁11から起立フランジ部14に至る剛性を高めることができるので、後面衝突荷重のリヤサイドメンバ1上部への伝達が良好となる。   Further, in the present embodiment, the bead 20 that is continuous from the rear end of the upper wall 11 of the reinforcement 10 to the upper end of the standing flange portion 14 is provided, so that the rigidity from the upper wall 11 of the reinforcement 10 to the standing flange portion 14 is provided. Therefore, the transmission of the rear collision load to the upper part of the rear side member 1 is good.

更に、前記ビード20は、上壁11では上方に膨出されているとともに、起立フランジ部14では車両後方に膨出されていて、上壁11の下面に形成される溝部20aと起立フランジ部14の前面に形成される溝部20bとが連続されるので、車体を電着塗装する際に断面略逆U字状となったレインフォース10の上部に溜まった空気を前記溝部20a,20bで案内しつつ、起立フランジ部20aの溝部20bの上端から外方に排出できるため、前記ビード20をエア抜きガイドとして電着塗装を良好に行わせることができる。   Further, the bead 20 bulges upward on the upper wall 11, and bulges rearward of the vehicle on the standing flange portion 14, so that the groove 20 a and the standing flange portion 14 formed on the lower surface of the upper wall 11. Since the groove portion 20b formed on the front surface of the body is continuous, air accumulated in the upper portion of the reinforcement 10 having a substantially inverted U-shaped cross section when the vehicle body is electrodeposited is guided by the groove portions 20a and 20b. However, since it can discharge | emit outward from the upper end of the groove part 20b of the standing flange part 20a, the electrodeposition coating can be favorably performed by using the bead 20 as an air bleeding guide.

更にまた、レインフォース10の両側壁12,13の下辺12c,13cを車両後方に向かって上方に傾斜して形成してあるので、レインフォース10の座屈を抑制して後面衝突荷重を安定的にリヤサイドメンバ1に伝達できるとともに、後面衝突荷重のリヤサイドメンバ1への伝達部位を効率よく高位置にできるため、荷重がリヤサイドメンバ1の下部に集中して入力されるのを抑制することができる。   Furthermore, since the lower sides 12c and 13c of the both side walls 12 and 13 of the reinforcement 10 are inclined upward toward the rear of the vehicle, buckling of the reinforcement 10 is suppressed and the rear collision load is stabilized. Can be transmitted to the rear side member 1 at the same time, and the transmission part of the rear collision load to the rear side member 1 can be efficiently placed at a high position, so that it is possible to prevent the load from being concentrated and input to the lower portion of the rear side member 1. .

図4は本発明の第2実施形態を示し、前記第1実施形態と同一構成部分に同一符号を付して重複する説明を省略して述べるものとし、図4は図2に対応した断面図である。   FIG. 4 shows a second embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. 4 is a sectional view corresponding to FIG. It is.

本実施形態の車体の後部構造は、基本的に第1実施形態と略同様の構成となり、図4に示すようにレインフォース10をテールクロスメンバ2内に配置して、リヤサイドメンバ1の延長上でテールクロスメンバ2の前壁2fに結合してあり、かつ、レインフォース10の上壁11を前記リヤサイドメンバ1の上端となるフロアパネル3よりも下方に所定量α(図2参照)をもってオフセットして配置してあり、そして、テールクロスメンバ2の上壁2uとリヤサイドメンバ1の上端となるフロアパネル3との高さを略一致させてある。   The rear structure of the vehicle body of this embodiment is basically the same as that of the first embodiment. As shown in FIG. 4, the reinforcement 10 is disposed in the tail cross member 2 to extend the rear side member 1. Are connected to the front wall 2f of the tail cross member 2 and the upper wall 11 of the reinforcement 10 is offset by a predetermined amount α (see FIG. 2) below the floor panel 3 serving as the upper end of the rear side member 1. Further, the height of the upper wall 2u of the tail cross member 2 and the floor panel 3 which is the upper end of the rear side member 1 are substantially matched.

勿論、本実施形態にあってもレインフォース10の上壁11の車両前方端部に起立フランジ部14を形成して、この起立フランジ部14がテールクロスメンバ2の前壁2fに接合されている。   Of course, even in the present embodiment, the standing flange portion 14 is formed at the vehicle front end portion of the upper wall 11 of the reinforcement 10, and the standing flange portion 14 is joined to the front wall 2 f of the tail cross member 2. .

そして、本実施形態では前記テールクロスメンバ2の上壁2uを、その車両後方を下方に下げて形成してある。   In this embodiment, the upper wall 2u of the tail cross member 2 is formed by lowering the vehicle rear side downward.

つまり、前記テールクロスメンバ2の上壁2uは、その車両前端2ufが前記リヤサイドメンバ1の上端となるフロアパネル3と略同一高さとなっており、その前端2ufから所定距離Lだけ車両後方に移動した点Pから車両後方に向かって徐々に下方に傾斜する傾斜面2Sを形成してある。   That is, the upper wall 2u of the tail cross member 2 has a vehicle front end 2uf that is substantially the same height as the floor panel 3 that is the upper end of the rear side member 1, and moves rearward from the front end 2uf by a predetermined distance L. An inclined surface 2S that is gradually inclined downward from the point P toward the rear of the vehicle is formed.

前記傾斜面2Sは直線的に傾斜される場合を図示したが、これに限ることなく上壁2uの車両後方が全体的に押し下げられる形状、例えば、階段状に傾斜させることもできる。   Although the case where the inclined surface 2S is inclined linearly is illustrated, the present invention is not limited to this, and the inclined surface 2S may be inclined in a shape such as a stepped shape in which the vehicle rear side of the upper wall 2u is entirely pushed down.

従って、本実施形態の車体の後部構造によれば、バックドア開口部5の下縁となるリヤクロスメンバ2の上壁2uの車両後方が下方に下げられているため、前記バックドア開口部5の入口部分の開口面積をより大きくすることができ、荷物の積み下ろしがより容易になる。   Therefore, according to the rear structure of the vehicle body of the present embodiment, the vehicle rear of the upper wall 2u of the rear cross member 2 serving as the lower edge of the back door opening 5 is lowered downward, so that the back door opening 5 The opening area of the entrance portion of the bag can be increased, and the loading and unloading of the load becomes easier.

ところで、本発明の車体の後部構造は前記第1・第2実施形態に例をとって説明したが、これら実施形態に限ることなく本発明の要旨を逸脱しない範囲で他の実施形態を各種採用することができ、例えば、レインフォース10は上壁11および両側壁12,13を備えて断面略逆U字状に形成したが、両側壁12,13の下辺を一体若しくは別体に覆って、レインフォース10を閉断面として形成した場合にも本発明を適用することができる。   By the way, the rear structure of the vehicle body of the present invention has been described by taking the first and second embodiments as examples. However, the present invention is not limited to these embodiments, and various other embodiments are adopted without departing from the gist of the present invention. For example, the reinforcement 10 includes an upper wall 11 and both side walls 12 and 13 and is formed in a substantially inverted U shape in cross section, but covers the lower sides of both side walls 12 and 13 integrally or separately, The present invention can also be applied when the reinforcement 10 is formed as a closed cross section.

本発明の第1実施形態における車体右側後部の骨格構造を示す斜視図。The perspective view which shows the frame | skeleton structure of the vehicle body right side rear part in 1st Embodiment of this invention. 図1中A−A線に沿った断面図。Sectional drawing along the AA line in FIG. 本発明の第1実施形態におけるレインフォースの斜視図。The perspective view of the reinforcement in 1st Embodiment of this invention. 図2に対応した断面図。Sectional drawing corresponding to FIG.

符号の説明Explanation of symbols

1 リヤサイドメンバ
2 テールクロスメンバ(クロスメンバ)
2u クロスメンバの上壁
2f クロスメンバの前壁
10 レインフォース
11 レインフォースの上壁
12,13 レインフォースの側壁
14 起立フランジ部
20 ビード
1 Rear side member 2 Tail cross member (cross member)
2u Upper wall of cross member 2f Front wall of cross member 10 Reinforce 11 Reinforce upper wall 12, 13 Reinforce side wall 14 Standing flange 20 Bead

Claims (5)

フロアパネルの下面に接合されて車両前後方向に延在するリヤサイドメンバと、
フロアパネルおよびリヤサイドメンバの後端に結合されて車幅方向に延在する閉断面構造のクロスメンバと、
少なくとも上壁とこの上壁の車幅方向両側から垂下された両側壁とを有し、前記クロスメンバの内部に配置されて、リヤサイドメンバの延長上でクロスメンバの前壁に結合され、車両後方に突出するレインフォースと、を備えた車体の後部構造において、
前記レインフォースの上壁を前記リヤサイドメンバの上端位置よりも下方に所定量オフセットして配置するとともに、該レインフォースの上壁の車両前方端部に、上方に立ち上がって前記クロスメンバの前壁に接合される起立フランジ部を形成したことを特徴とする車体の後部構造。
A rear side member joined to the lower surface of the floor panel and extending in the vehicle longitudinal direction;
A cross member having a closed cross-sectional structure coupled to the rear ends of the floor panel and the rear side member and extending in the vehicle width direction;
At least an upper wall and both side walls hanging from both sides of the upper wall in the vehicle width direction, disposed inside the cross member, and coupled to the front wall of the cross member on the extension of the rear side member, In the rear structure of the vehicle body, which has
The upper wall of the reinforcement is disposed offset by a predetermined amount below the position of the upper end of the rear side member, and rises upward at the vehicle front end of the upper wall of the rear force to the front wall of the cross member. A rear structure of a vehicle body, wherein a standing flange portion to be joined is formed.
レインフォースの上壁後端から前記起立フランジ部の上端に亘って連続するビードを設けたことを特徴とする請求項1に記載の車体の後部構造。   The rear structure of the vehicle body according to claim 1, wherein a bead is provided continuously from the rear end of the upper wall of the reinforcement to the upper end of the standing flange portion. ビードは、上壁では上方に膨出されるとともに、起立フランジ部では車両後方に膨出させたことを特徴とする請求項2に記載の車体の後部構造。   The rear structure of the vehicle body according to claim 2, wherein the bead is bulged upward at the upper wall and bulged rearward of the vehicle at the standing flange portion. レインフォースの両側壁は、それらの下辺が車両後方に向かって上方に傾斜して形成されたことを特徴とする請求項1〜3のいずれか1つに記載の車体の後部構造。   The rear part structure of the vehicle body according to any one of claims 1 to 3, wherein both side walls of the reinforcement are formed such that their lower sides are inclined upward toward the rear of the vehicle. クロスメンバの上壁は、その車両後方を下方に下げて形成したことを特徴とする請求項1〜4のいずれか1つに記載の車体の後部構造。   The rear part structure of a vehicle body according to any one of claims 1 to 4, wherein the upper wall of the cross member is formed by lowering the rear of the vehicle downward.
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FR2932147A1 (en) * 2008-06-10 2009-12-11 Renault Sas SYSTEM FOR REASSURING EFFORT ON THE LOWER PART OF THE REAR OF A VEHICLE
FR2951427A1 (en) * 2009-10-15 2011-04-22 Peugeot Citroen Automobiles Sa Rear body part for motor vehicle, has metal sheets attached on one another to form hollow body, where hollow body emerges towards exterior by opening at each of opposite ends of part
EP2666675A1 (en) * 2012-05-22 2013-11-27 Honda Motor Co., Ltd. Vehicle body rear structure
CN112776894A (en) * 2021-02-26 2021-05-11 重庆长安汽车股份有限公司 Stiffening beam in automobile front wall plate
JP7532575B1 (en) 2023-02-24 2024-08-13 本田技研工業株式会社 Body structure

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JPH0752820A (en) * 1993-08-09 1995-02-28 Nissan Motor Co Ltd Manufacture of frame member for automobile
JPH09104363A (en) * 1995-10-12 1997-04-22 Mazda Motor Corp Rear part structure of vehicle body
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2932147A1 (en) * 2008-06-10 2009-12-11 Renault Sas SYSTEM FOR REASSURING EFFORT ON THE LOWER PART OF THE REAR OF A VEHICLE
EP2133258A1 (en) * 2008-06-10 2009-12-16 Renault s.a.s. Load-bearing system on the bottom rear of a vehicle
FR2951427A1 (en) * 2009-10-15 2011-04-22 Peugeot Citroen Automobiles Sa Rear body part for motor vehicle, has metal sheets attached on one another to form hollow body, where hollow body emerges towards exterior by opening at each of opposite ends of part
EP2666675A1 (en) * 2012-05-22 2013-11-27 Honda Motor Co., Ltd. Vehicle body rear structure
US8888151B2 (en) 2012-05-22 2014-11-18 Honda Motor Co., Ltd. Vehicle body rear structure
CN112776894A (en) * 2021-02-26 2021-05-11 重庆长安汽车股份有限公司 Stiffening beam in automobile front wall plate
JP7532575B1 (en) 2023-02-24 2024-08-13 本田技研工業株式会社 Body structure

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