JP2020175777A - Rear structure of the car body - Google Patents

Rear structure of the car body Download PDF

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Publication number
JP2020175777A
JP2020175777A JP2019079427A JP2019079427A JP2020175777A JP 2020175777 A JP2020175777 A JP 2020175777A JP 2019079427 A JP2019079427 A JP 2019079427A JP 2019079427 A JP2019079427 A JP 2019079427A JP 2020175777 A JP2020175777 A JP 2020175777A
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Prior art keywords
vehicle
wheel house
vehicle body
pillar member
rear pillar
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JP7312369B2 (en
Inventor
晋栄 望月
Kunishige Mochizuki
晋栄 望月
祐介 粂田
Yusuke Kumeta
祐介 粂田
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Suzuki Motor Corp
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Suzuki Motor Corp
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Priority to JP2019079427A priority Critical patent/JP7312369B2/en
Priority to DE102020201382.9A priority patent/DE102020201382B4/en
Priority to FR2003634A priority patent/FR3095181A1/en
Publication of JP2020175777A publication Critical patent/JP2020175777A/en
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Publication of JP7312369B2 publication Critical patent/JP7312369B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/087—Luggage compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/02—Side panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
    • B62D25/2027—Floors or bottom sub-units in connection with other superstructure subunits the subunits being rear structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/088—Details of structures as upper supports for springs or dampers

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

【課題】ホイールハウス周辺メンバに伝わった荷重を車両上方へ伝達して分散させ、サイドメンバ及びリヤホイールハウスへの局所的な荷重集中を低減させる。【解決手段】車体側部１に設けられるリヤドア開口部１１と、車体側部１の下方に設けられるサイドシル２と、サイドシル２の車両幅方向内側に設けられるサイドメンバ３と、リヤドア開口部１１の車両後方側に設けられ、サイドメンバ３から立ち上がって配置されるリヤピラーメンバ４を有し、サイドシル２及びサイドメンバ３の下部には、リヤサスペンションブラケット５が設けられている車体後部構造において、リヤピラーメンバ４の下側の車両前方には、ホイールハウス周辺メンバ７が設けられており、ホイールハウス周辺メンバ７の上部７ａは、リヤピラーメンバ４の下側に接合され、ホイールハウス周辺メンバ７の下部７ｂは、サイドシル２及びサイドメンバ３に接合され、かつリヤサスペンションブラケット５と車両上方視で重なり合って配置されている。【選択図】図２An object of the present invention is to distribute a load transmitted to a wheel house peripheral member upwardly of a vehicle and reduce local concentration of the load on the side member and the rear wheel house. A rear door opening (11) provided in a vehicle body side (1), a side sill (2) provided below the vehicle body side (1), a side member (3) provided inside the side sill (2) in the vehicle width direction, and a rear door opening (11). A rear pillar member in a vehicle body rear structure having a rear pillar member 4 that is provided on the rear side of the vehicle and arranged to stand up from a side member 3, and a rear suspension bracket 5 that is provided below the side sill 2 and the side member 3. A wheel house peripheral member 7 is provided in front of the vehicle on the lower side of 4. An upper portion 7a of the wheel house peripheral member 7 is joined to the lower side of the rear pillar member 4, and a lower portion 7b of the wheel house peripheral member 7 is joined to the lower side of the rear pillar member 4. , the side sill 2 and the side member 3, and are arranged so as to overlap the rear suspension bracket 5 when viewed from above the vehicle. [Selection drawing] Fig. 2

Description

本発明は、車体後部構造に関する。 The present invention relates to a vehicle body rear structure.

従来の車体後部構造は、車体後部のリヤピラー（Ｃピラー）が車体中間部のセンタピラー（Ｂピラー）のような骨格を考慮した構造ではなく、サイドボディアウタパネルとホイールハウスアウタパネル（またはクォータパネル）との間に挟まれた空間を有する構造となっている（例えば、特許文献１参照）。 In the conventional rear body structure, the rear pillar (C pillar) at the rear of the car body is not a structure that considers the skeleton like the center pillar (B pillar) at the middle part of the car body, but the side body outer panel and the wheel house outer panel (or quarter panel). It has a structure having a space sandwiched between the two (see, for example, Patent Document 1).

特開２０１８−５２３７２号公報Japanese Unexamined Patent Publication No. 2018-52372

このように従来の車体後部構造は、リヤピラーが骨格としての機能を持たない構造であり、センタピラーとバックピラー（Ｄピラー、及び機種によりショック取付部リンフォースメント）との間で車両上下方向の骨格が無く、アンダーボディを支持する支柱が存在しない構造となっているので、トレリングアーム取付部やコイル支持部に掛かる車両上下方向の荷重や振動を効率良く抑えることができないという問題を有していた。また、車体後部の荷重及び振動入力点の上下方向の剛性が低いと、ロードノイズ悪化の原因を招いてしまうという問題を有していた。 In this way, the conventional rear body structure is a structure in which the rear pillar does not function as a skeleton, and the vehicle is vertically oriented between the center pillar and the back pillar (D pillar and, depending on the model, the shock mounting portion reinforcement). Since there is no skeleton and there is no support column to support the underbody, there is a problem that the load and vibration in the vertical direction of the vehicle applied to the trailing arm mounting part and the coil support part cannot be efficiently suppressed. Was there. Further, if the load in the rear part of the vehicle body and the rigidity of the vibration input point in the vertical direction are low, there is a problem that the road noise is deteriorated.

本発明はこのような実状に鑑みてなされたものであって、その目的は、リヤサスペンションブラケットの車両上方への荷重をサイドメンバが受け、ホイールハウス周辺メンバがサイドメンバの上方から支えることにより、ホイールハウス周辺メンバに伝わった荷重を車両上方へ伝達して分散させ、サイドメンバ及びリヤホイールハウスへの局所的な荷重集中を低減させることが可能な車体後部構造を提供することにある。 The present invention has been made in view of such an actual situation, and an object of the present invention is to allow a side member to receive a load on the rear suspension bracket above the vehicle and to support the wheel house peripheral member from above the side member. It is an object of the present invention to provide a vehicle body rear structure capable of transmitting and distributing the load transmitted to the peripheral members of the wheel house to the upper part of the vehicle and reducing the local load concentration on the side members and the rear wheel house.

上記従来技術の有する課題を解決するために、本発明は、車体側部に設けられるリヤドア開口部と、車体側部の下方に設けられ、車両前後方向に延びるサイドシルと、該サイドシルの車両幅方向内側に設けられ、車両前後方向に延びるサイドメンバと、前記リヤドア開口部の車両後方側に設けられ、前記サイドメンバから立ち上がって配置されるリヤピラーメンバを有し、前記サイドシル及び前記サイドメンバの下部には、リヤサスペンションを取付けるリヤサスペンションブラケットが設けられている車体後部構造において、前記リヤピラーメンバの下側の車両前方には、ホイールハウス周辺メンバが設けられており、該ホイールハウス周辺メンバの上部は、前記リヤピラーメンバの下側に接合されているとともに、前記ホイールハウス周辺メンバの下部は、前記サイドシル及び前記サイドメンバに接合され、かつ前記リヤサスペンションブラケットと車両上方視で重なり合って配置されている。 In order to solve the problems of the prior art, the present invention includes a rear door opening provided on the side of the vehicle body, a side sill provided below the side of the vehicle body and extending in the front-rear direction of the vehicle, and a vehicle width direction of the side sill. It has a side member provided on the inside and extending in the front-rear direction of the vehicle, and a rear pillar member provided on the rear side of the vehicle at the rear door opening and arranged so as to stand up from the side member, and on the side sill and the lower part of the side member. Is a vehicle body rear structure in which a rear suspension bracket for mounting a rear suspension is provided, a wheel house peripheral member is provided in front of the vehicle below the rear pillar member, and an upper portion of the wheel house peripheral member is provided. It is joined to the lower side of the rear pillar member, and the lower part of the wheel house peripheral member is joined to the side sill and the side member, and is arranged so as to overlap the rear suspension bracket when viewed from above the vehicle.

上述の如く、本発明に係る車体後部構造は、車体側部に設けられるリヤドア開口部と、車体側部の下方に設けられ、車両前後方向に延びるサイドシルと、該サイドシルの車両幅方向内側に設けられ、車両前後方向に延びるサイドメンバと、前記リヤドア開口部の車両後方側に設けられ、前記サイドメンバから立ち上がって配置されるリヤピラーメンバを有し、前記サイドシル及び前記サイドメンバの下部には、リヤサスペンションを取付けるリヤサスペンションブラケットが設けられている構造であって、前記リヤピラーメンバの下側の車両前方には、ホイールハウス周辺メンバが設けられており、該ホイールハウス周辺メンバの上部は、前記リヤピラーメンバの下側に接合されているとともに、前記ホイールハウス周辺メンバの下部は、前記サイドシル及び前記サイドメンバに接合され、かつ前記リヤサスペンションブラケットと車両上方視で重なり合って配置されている。
したがって、本発明の車体後部構造では、リヤサスペンションブラケットに加わる車両上方への荷重をサイドメンバが受け、かつ、ホイールハウス周辺メンバがサイドメンバの上方から支えているとともに、当該ホイールハウス周辺メンバに伝わった荷重を車両上方へ伝達して分散するように構成されているので、サイドメンバ及びホイールハウスへの局所的な荷重集中を効果的に低減させることができる。 As described above, the vehicle body rear structure according to the present invention is provided with a rear door opening provided on the vehicle body side portion, a side sill provided below the vehicle body side portion and extending in the vehicle front-rear direction, and inside the side sill in the vehicle width direction. It has a side member extending in the front-rear direction of the vehicle and a rear pillar member provided on the rear side of the rear door opening of the vehicle and arranged so as to stand up from the side member. The side sill and the lower portion of the side member have a rear. The structure is provided with a rear suspension bracket for mounting the suspension, and a wheel house peripheral member is provided in front of the vehicle below the rear pillar member, and the upper portion of the wheel house peripheral member is the rear pillar member. Along with being joined to the lower side, the lower portion of the wheel house peripheral member is joined to the side sill and the side member, and is arranged so as to overlap the rear suspension bracket when viewed from above the vehicle.
Therefore, in the vehicle body rear structure of the present invention, the side member receives the load applied to the rear suspension bracket upward of the vehicle, and the wheel house peripheral member supports the rear suspension bracket from above the side member and is transmitted to the wheel house peripheral member. Since it is configured to transmit and disperse the applied load to the upper part of the vehicle, it is possible to effectively reduce the local load concentration on the side member and the wheel house.

本発明の実施形態に係る構造が適用される車両の車体後部を車両内側の前側斜め上方から見た斜視図である。It is a perspective view which looked at the rear part of the vehicle body of the vehicle to which the structure which concerns on embodiment of this invention is applied from the front side diagonally above on the inside of a vehicle. 図１における車体後部を車両内側から見た側面図である。It is a side view which looked at the rear part of the vehicle body in FIG. 1 from the inside of a vehicle. 図１における車体後部のホイールハウス周辺メンバ及びその周辺部を車両内側の前側斜め上方から見た斜視図である。FIG. 1 is a perspective view of a wheel house peripheral member at the rear of the vehicle body and its peripheral portion as viewed from diagonally above the front side inside the vehicle. 本実施形態の車体後部構造におけるリヤサスペンションブラケット及びその周辺部を車両下方から見た平面図である。It is a top view which looked at the rear suspension bracket and its peripheral part in the vehicle body rear structure of this embodiment from the lower side of a vehicle. 本実施形態の車体後部構造におけるスプリングシート及びその周辺部を車両内側の前側斜め上方から見た斜視図である。It is a perspective view of the spring seat and the peripheral part thereof in the vehicle body rear structure of this embodiment seen from the front side obliquely upper side inside the vehicle.

以下、本発明を図示の実施の形態に基づいて詳細に説明する。
図１〜図５は本発明の実施形態に係る車体後部構造を示すものである。なお、図において、矢印Ｆｒ方向は車両前方を示し、矢印Ｉ方向は車両幅方向内側を示し、矢印Ｕ方向は車両上方を示している。 Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
1 to 5 show a vehicle body rear structure according to an embodiment of the present invention. In the figure, the arrow Fr direction indicates the front of the vehicle, the arrow I direction indicates the inside of the vehicle width direction, and the arrow U direction indicates the upper side of the vehicle.

本発明の実施形態の車体後部構造は、図１及び図２に示すように、車体側部（サイドボディ）１に設けられるリヤドア開口部１１と、車体側部１の下方に設けられ、車両前後方向に延びるサイドシル２と、サイドシル２の車両幅方向内側に隣接して設けられ、車両前後方向に延びるサイドメンバ３と、リヤドア開口部１１の車両後方側に設けられ、サイドメンバ３から立ち上がって配置され、車両上下方向に沿って延びるリヤピラーメンバ４を有している。そして、サイドシル２及びサイドメンバ３の下部には、図示しないリヤサスペンションを取付けるリヤサスペンションブラケット５が設けられている。
サイドシル２は、図１に示すように、車両前後方向で前後に配置されるメインフロアパネル６Ａ及びリヤフロアパネル６Ｂの車両幅方向側部に設けられている。また、サイドメンバ３は、車両前後の位置に設けられるフロントサイドメンバ３１及びリヤサイドメンバ３２を有しており、リヤピラーメンバ４及びリヤサスペンションブラケット５は、サイドメンバ３のリヤサイドメンバ３２側に設けられている。さらに、サイドシル２とサイドメンバ３とは、メインフロアパネル６Ａ及びリヤフロアパネル６Ｂを間において接合されている。 As shown in FIGS. 1 and 2, the vehicle body rear structure of the embodiment of the present invention is provided below the rear door opening 11 provided on the vehicle body side portion (side body) 1 and the vehicle body side portion 1, and is provided in front of and behind the vehicle. The side sill 2 extending in the direction is provided adjacent to the inside of the side sill 2 in the vehicle width direction, the side member 3 extending in the vehicle front-rear direction, and the rear door opening 11 are provided on the rear side of the vehicle and are arranged so as to stand up from the side member 3. It has a rear pillar member 4 extending along the vehicle vertical direction. A rear suspension bracket 5 for mounting a rear suspension (not shown) is provided below the side sill 2 and the side member 3.
As shown in FIG. 1, the side sill 2 is provided on the side portion of the main floor panel 6A and the rear floor panel 6B arranged in the front-rear direction in the vehicle front-rear direction in the vehicle width direction. Further, the side member 3 has a front side member 31 and a rear side member 32 provided at positions in front of and behind the vehicle, and the rear pillar member 4 and the rear suspension bracket 5 are provided on the rear side member 32 side of the side member 3. There is. Further, the side sill 2 and the side member 3 are joined between the main floor panel 6A and the rear floor panel 6B.

本実施形態におけるリヤピラーメンバ４の下側の車両前方には、図１〜図３に示すように、ホイールハウス周辺メンバ７が設けられており、該ホイールハウス周辺メンバ７は、上下部分を除いた部分が車体側部１に重ね合わせて接合可能な断面形状を有している。また、ホイールハウス周辺メンバ７は、斜め後方上がりの状態で、車両上下方向に延びるリヤピラーメンバ４の下側と、車両前後方向に延びるサイドシル２及びサイドメンバ３との前後上下間を傾斜して配置されており、リヤピラーメンバ４とホイールハウス周辺メンバ７とによって、車両側方視で「ト」字形状もしくは「人」字形状に形成されている。そして、ホイールハウス周辺メンバ７の上部７ａは、リヤピラーメンバ４の下側に接合されているとともに、ホイールハウス周辺メンバ７の下部７ｂは、サイドシル２及びサイドメンバ３に接合され、かつリヤサスペンションブラケット５と車両上方視で重なり合って配置されている。これにより、リヤサスペンションブラケット５から入力される車両上方への荷重をホイールハウス周辺メンバ７が受けるとともに、ホイールハウス周辺メンバ７がサイドメンバ３の上方から支えることになり、ホイールハウス周辺メンバ７に伝わった荷重を車両上方へ伝達して分散するように構成されている。
なお、本実施形態のリヤサスペンションブラケット５は、サイドシル２及びサイドメンバ３に接合されており、直接にはホイールハウス周辺メンバ７に接合されていないが、リヤサイドメンバ３２等を介して荷重が伝達されるようになっている。 As shown in FIGS. 1 to 3, a wheel house peripheral member 7 is provided in front of the vehicle below the rear pillar member 4 in the present embodiment, and the wheel house peripheral member 7 excludes upper and lower portions. The portion has a cross-sectional shape that can be overlapped and joined to the vehicle body side portion 1. Further, the wheel house peripheral member 7 is arranged so as to be inclined between the lower side of the rear pillar member 4 extending in the vehicle vertical direction and the side sill 2 and the side member 3 extending in the vehicle front-rear direction in a state of being diagonally raised rearward. The rear pillar member 4 and the wheel house peripheral member 7 form a "T" shape or a "human" shape when viewed from the side of the vehicle. The upper portion 7a of the wheel house peripheral member 7 is joined to the lower side of the rear pillar member 4, and the lower portion 7b of the wheel house peripheral member 7 is joined to the side sill 2 and the side member 3, and the rear suspension bracket 5 And are arranged so that they overlap each other when viewed from above the vehicle. As a result, the wheel house peripheral member 7 receives the load input from the rear suspension bracket 5 to the upper side of the vehicle, and the wheel house peripheral member 7 supports the side member 3 from above, which is transmitted to the wheel house peripheral member 7. It is configured to transmit and disperse the applied load above the vehicle.
The rear suspension bracket 5 of the present embodiment is joined to the side sill 2 and the side member 3, and is not directly joined to the wheel house peripheral member 7, but the load is transmitted via the rear side member 32 and the like. It has become so.

また、本実施形態のリヤピラーメンバ４は、図１〜図５に示すように、サイドメンバ３のリヤサイドメンバ３２から車体上部８のルーフメンバ８１まで車両上下方向に延び、骨格構造を考慮した構造となっている。そのため、リヤピラーメンバ４は、車両上下の位置に設けられる上側リヤピラーメンバ４１及び下側リヤピラーメンバ４２を有しており、上側リヤピラーメンバ４１の下端部と下側リヤピラーメンバ４２の上端部とは互いに接合され、連続して延びる一体構造に構成されている。そして、上側リヤピラーメンバ４１の上部４１ａは、車体上部８のルーフメンバ８１の壁面に重ね合わせることが可能な形状を有しており、当該ルーフメンバ８１の壁面に接合されている。下側リヤピラーメンバ４２の下部４２ａは、リヤサイドメンバ３２の壁面に重ね合わせることが可能な形状を有しており、当該リヤサイドメンバ３２の内側フランジと外側フランジを跨ぎ、リヤフロアパネル６Ｂを間に挟んで当該リヤサイドメンバ３２に接合されている。しかも、下側リヤピラーメンバ４２の下部４２ａは、リヤサイドメンバ３２の下面３２ａに設けられたスプリングシート９と車両上方視で重なり合って配置されている。このスプリングシート９は、図示しないリヤサスペンションに用いられるスプリングを支持する円板形状に形成されている。
これにより、スプリングシート９に掛かる荷重は、まずリヤサイドメンバ３２の底辺が受け、リヤサイドメンバ３２を介して下側リヤピラーメンバ４２に伝達され、周辺のメンバやパネルに分散されるとともに、上側リヤピラーメンバ４１を介してルーフメンバ８１を含む車体後部の広い範囲に分散されることになる。同様に、ホイールハウス周辺メンバ７からの荷重も、車体後部の広い範囲に分散されることになる。 Further, as shown in FIGS. 1 to 5, the rear pillar member 4 of the present embodiment extends from the rear side member 32 of the side member 3 to the roof member 81 of the upper portion 8 of the vehicle body in the vertical direction of the vehicle, and has a structure in consideration of the skeleton structure. It has become. Therefore, the rear pillar member 4 has an upper rear pillar member 41 and a lower rear pillar member 42 provided at positions above and below the vehicle, and the lower end portion of the upper rear pillar member 41 and the upper end portion of the lower rear pillar member 42 are joined to each other. It is configured as an integral structure that extends continuously. The upper portion 41a of the upper rear pillar member 41 has a shape that can be overlapped with the wall surface of the roof member 81 of the upper portion 8 of the vehicle body, and is joined to the wall surface of the roof member 81. The lower portion 42a of the lower rear pillar member 42 has a shape that can be overlapped with the wall surface of the rear side member 32, straddles the inner flange and the outer flange of the rear side member 32, and sandwiches the rear floor panel 6B between them. It is joined to the rear side member 32. Moreover, the lower portion 42a of the lower rear pillar member 42 is arranged so as to overlap the spring seat 9 provided on the lower surface 32a of the rear side member 32 when viewed upward from the vehicle. The spring seat 9 is formed in a disk shape that supports a spring used for a rear suspension (not shown).
As a result, the load applied to the spring seat 9 is first received by the bottom of the rear side member 32, transmitted to the lower rear pillar member 42 via the rear side member 32, distributed to the surrounding members and panels, and distributed to the surrounding members and panels, and the upper rear pillar member 41. It will be distributed over a wide range of the rear part of the vehicle body including the roof member 81. Similarly, the load from the wheel house peripheral member 7 is also distributed over a wide range at the rear of the vehicle body.

本実施形態の車体後部構造において、下側リヤピラーメンバ４２の車両前方側には、図１〜図５に示すように、図外のリヤタイヤやリヤサスペンションなどを収めるリヤホイールハウス１２が設けられており、該リヤホイールハウス１２は、車両幅方向外側に位置するホイールハウスアウタパネル１２Ａと車両幅方向内側に位置するホイールハウスインナパネル１２Ｂとから構成されている。ホイールハウスアウタパネル１２Ａ及びホイールハウスインナパネル１２Ｂは、上部稜線のフランジ（図示せず）を接合することにより円弧状に形成されている。そして、ホイールハウス周辺メンバ７は、ホイールハウスインナパネル１２Ｂの上部外周面に沿って斜め後方上側に延びた湾曲形状を有しており、ホイールハウス周辺メンバ７の上部７ａと下側リヤピラーメンバ４２とは、リヤホイールハウス１２に接した状態で接合されている。そのため、ホイールハウスインナパネル１２Ｂ側には、ホイールハウス周辺メンバ７の閉断面が形成されることになる。
これにより、リヤホイールハウス１２を構成するホイールハウスアウタパネル１２Ａ及びホイールハウスインナパネル１２Ｂのフランジ接合部の剛性や、リヤホイールハウス１２の曲面剛性が利用可能となり、ホイールハウス周辺メンバ７の剛性を確保できる構造になっている。 In the vehicle body rear structure of the present embodiment, as shown in FIGS. 1 to 5, a rear wheel house 12 for accommodating a rear tire, a rear suspension, etc. (not shown) is provided on the vehicle front side of the lower rear pillar member 42. The rear wheel house 12 is composed of a wheel house outer panel 12A located outside in the vehicle width direction and a wheel house inner panel 12B located inside in the vehicle width direction. The wheel house outer panel 12A and the wheel house inner panel 12B are formed in an arc shape by joining flanges (not shown) of the upper ridge line. The wheel house peripheral member 7 has a curved shape extending diagonally rearward and upward along the upper outer peripheral surface of the wheel house inner panel 12B, and includes the upper portion 7a and the lower rear pillar member 42 of the wheel house peripheral member 7. Is joined in contact with the rear wheel house 12. Therefore, a closed cross section of the wheel house peripheral member 7 is formed on the wheel house inner panel 12B side.
As a result, the rigidity of the flange joints of the wheel house outer panel 12A and the wheel house inner panel 12B constituting the rear wheel house 12 and the rigidity of the curved surface of the rear wheel house 12 can be used, and the rigidity of the wheel house peripheral member 7 can be secured. It has a structure.

また、本実施形態の車体後部構造においては、図４に示すように、車両上方視で傾斜しているサイドシル２の後端部２ａ、リヤサイドメンバ３２の側部３２ｂ及びホイールハウスインナパネル１２Ｂの前部１２Ｂａの３面によって形成される縦方向（車両上下方向）の筒形状部Ｓを有しており、サイドシル２の後端部２ａは、車両上方視で車両外側へ向かって車両後方に傾斜している。すなわち、リヤサスペンションブラケット５の上方は、サイドシル２とリヤサイドメンバ３２とが別れて空洞になっているとともに、その空洞の車両後方でサイドシル２の後端部２ａ及びリヤサイドメンバ３２の側部３２ｂがホイールハウスインナパネル１２Ｂの前部１２Ｂａと接合されているため、リヤサスペンションブラケット５の上方には、３部品の面で形成された筒状の構造が得られることになる。
筒形状部Ｓが有する縦方向に延びた壁面は、車両上下方向の荷重を伝える剛性を有していることから、リヤサスペンションブラケット５とリヤサイドメンバ３２とが直接接合されていなくても、荷重を効率良く伝えることが可能となり、リヤサイドメンバ３２やリヤホイールハウス１２への荷重負担が低減されることになる。 Further, in the vehicle body rear structure of the present embodiment, as shown in FIG. 4, the rear end portion 2a of the side sill 2 tilted when viewed from above the vehicle, the side portion 32b of the rear side member 32, and the front of the wheel house inner panel 12B. It has a cylindrical portion S in the vertical direction (vehicle vertical direction) formed by the three surfaces of the portion 12Ba, and the rear end portion 2a of the side sill 2 is inclined rearward of the vehicle toward the outside of the vehicle when viewed upward from the vehicle. ing. That is, above the rear suspension bracket 5, the side sill 2 and the rear side member 32 are separated into a cavity, and the rear end portion 2a of the side sill 2 and the side portion 32b of the rear side member 32 are wheels behind the hollow vehicle. Since it is joined to the front portion 12Ba of the house inner panel 12B, a tubular structure formed by the surfaces of the three components can be obtained above the rear suspension bracket 5.
Since the wall surface extending in the vertical direction of the tubular shape portion S has rigidity to transmit the load in the vehicle vertical direction, the load can be applied even if the rear suspension bracket 5 and the rear side member 32 are not directly joined. It becomes possible to transmit efficiently, and the load load on the rear side member 32 and the rear wheel house 12 is reduced.

さらに、本実施形態の車体後部構造においては、図３〜図５に示すように、リヤサスペンションブラケット５及び筒形状部Ｓに隣接して位置するリヤサイドメンバ３２に第１補強プレート３３が設けられており、該第１補強プレート３３は、上部を除く左右側部及び下部がほぼ直角に折り曲げられ、リヤサイドメンバ３２の左右側壁面及び底壁面に接合されている。この第１補強プレート３３は、リヤサスペンションブラケット５からの荷重によって生じるリヤサイドメンバ３２の歪を低減し、車両上方へ荷重を伝える補強部となり、間接的に筒形状部Ｓが倒れて荷重が逃げることを抑える効果を有している。
また、下側リヤピラーメンバ４２の下部４２ａの下側に位置するリヤサイドメンバ３２には、前後一対の第２補強プレート３４が下側リヤピラーメンバ４２の内部と外部に間隔を空けて設けられており、該第２補強プレート３４は、上部を除く左右側部及び下部がほぼ直角に折り曲げられ、リヤサイドメンバ３２の左右側壁面及び底壁面にそれぞれ接合されている。これら第２補強プレート３４は、リヤサイドメンバ３２に入力される荷重を下側リヤピラーメンバ４２に効率良く伝達するものであり、スプリングシート９のスプリング荷重を直接的に下側リヤピラーメンバ４２に伝え、リヤサイドメンバ３２の負担を低減する効果を有している。 Further, in the vehicle body rear structure of the present embodiment, as shown in FIGS. 3 to 5, the first reinforcing plate 33 is provided on the rear suspension bracket 5 and the rear side member 32 located adjacent to the tubular portion S. The left and right side portions and the lower portion of the first reinforcing plate 33 except the upper portion are bent at a substantially right angle, and are joined to the left and right side wall surfaces and the bottom wall surface of the rear side member 32. The first reinforcing plate 33 reduces the distortion of the rear side member 32 caused by the load from the rear suspension bracket 5, serves as a reinforcing portion that transmits the load upward to the vehicle, and indirectly causes the tubular shape portion S to fall and escape the load. It has the effect of suppressing.
Further, the rear side member 32 located below the lower portion 42a of the lower rear pillar member 42 is provided with a pair of front and rear second reinforcing plates 34 at intervals inside and outside the lower rear pillar member 42. The left and right side portions and the lower portion of the second reinforcing plate 34 except the upper portion are bent at a substantially right angle, and are joined to the left and right side wall surfaces and the bottom wall surface of the rear side member 32, respectively. These second reinforcing plates 34 efficiently transmit the load input to the rear side member 32 to the lower rear pillar member 42, and directly transmit the spring load of the spring seat 9 to the lower rear pillar member 42 to the rear side. It has the effect of reducing the burden on the member 32.

このように、本発明の実施形態に係る車体後部構造は、車体側部１に設けられるリヤドア開口部１１と、車体側部１の下方に設けられ、車両前後方向に延びるサイドシル２と、サイドシル２の車両幅方向内側に設けられ、車両前後方向に延びるサイドメンバ３と、リヤドア開口部１１の車両後方側に設けられ、サイドメンバ３から立ち上がって配置されるリヤピラーメンバ４を有しており、サイドシル２及びサイドメンバ３の下部には、リヤサスペンションを取付けるリヤサスペンションブラケット５が設けられている。また、リヤピラーメンバ４の下側の車両前方には、ホイールハウス周辺メンバ７が設けられている。そして、ホイールハウス周辺メンバ７の上部７ａは、リヤピラーメンバ４の下側に接合され、ホイールハウス周辺メンバ７の下部７ｂは、サイドシル２及びサイドメンバ３に接合され、かつリヤサスペンションブラケット５と車両上方視で重なり合って配置されている。
したがって、本実施形態の車体後部構造は、リヤサスペンションブラケット５に掛かる車両上方への荷重をサイドメンバ３が受け、ホイールハウス周辺メンバ７がサイドメンバ３の上方から支える構造となっているので、車体後部の車両上下方向の剛性を確保できるとともに、サイドメンバ３及びリヤホイールハウス１２への局所的な荷重集中を効果的に低減させることができる。しかも、本実施形態の車体後部構造によれば、リヤサスペンションブラケット５からの荷重をホイールハウス周辺メンバ７に伝え、リヤピラーメンバ４を介して車両上方へ伝達するとともに、サイドシル２及びサイドメンバを介して車両前後方向へ伝達することも可能となるので、リヤサスペンション懸架の荷重を車体後部全体に分散させることができる。 As described above, the vehicle body rear structure according to the embodiment of the present invention includes a rear door opening 11 provided in the vehicle body side portion 1, a side sill 2 provided below the vehicle body side portion 1 and extending in the vehicle front-rear direction, and a side sill 2. It has a side member 3 which is provided inside in the vehicle width direction and extends in the vehicle front-rear direction, and a rear pillar member 4 which is provided on the rear side of the vehicle of the rear door opening 11 and is arranged so as to stand up from the side member 3. A rear suspension bracket 5 for attaching the rear suspension is provided below the 2 and the side member 3. Further, a wheel house peripheral member 7 is provided in front of the vehicle below the rear pillar member 4. The upper portion 7a of the wheel house peripheral member 7 is joined to the lower side of the rear pillar member 4, the lower portion 7b of the wheel house peripheral member 7 is joined to the side sill 2 and the side member 3, and the rear suspension bracket 5 and the upper part of the vehicle are joined. They are arranged so that they overlap visually.
Therefore, the vehicle body rear structure of the present embodiment has a structure in which the side member 3 receives the load applied to the rear suspension bracket 5 above the vehicle and the wheel house peripheral member 7 supports the rear suspension bracket 5 from above the side member 3. The rigidity of the rear part of the vehicle in the vertical direction can be ensured, and the local load concentration on the side member 3 and the rear wheel house 12 can be effectively reduced. Moreover, according to the vehicle body rear structure of the present embodiment, the load from the rear suspension bracket 5 is transmitted to the wheel house peripheral member 7, and is transmitted to the upper part of the vehicle via the rear pillar member 4, and also via the side sill 2 and the side member. Since it is possible to transmit the load in the front-rear direction of the vehicle, the load of the rear suspension suspension can be distributed to the entire rear part of the vehicle body.

また、本実施形態の車体後部構造において、リヤピラーメンバ４は、車両上下の位置に設けられる上側リヤピラーメンバ４１及び下側リヤピラーメンバ４２を有している。上側リヤピラーメンバ４１の上部４１ａは、車体上部８のルーフメンバ８１に接合され、下側リヤピラーメンバ４２の下部４２ａは、サイドメンバ３の下面に設けられたスプリングシート９と車両上方視で重なり合って配置されている。
したがって、本実施形態の車体後部構造によれば、スプリングシート９に掛かる荷重をリヤサイドメンバ３２の底辺が受け、高剛性のリヤサイドメンバ３２を介して下側リヤピラーメンバ４２、上側リヤピラーメンバ４１、ホイールハウス周辺メンバ７などに伝わるようになっているので、周辺部位のサイドシル２やリヤフロアパネル６Ｂなどに荷重を分散できるとともに、ルーフメンバ８１を含む車体後部の広い範囲に荷重を分散させることができる。 Further, in the vehicle body rear structure of the present embodiment, the rear pillar member 4 has an upper rear pillar member 41 and a lower rear pillar member 42 provided at positions above and below the vehicle. The upper portion 41a of the upper rear pillar member 41 is joined to the roof member 81 of the upper portion 8 of the vehicle body, and the lower portion 42a of the lower rear pillar member 42 is arranged so as to overlap the spring seat 9 provided on the lower surface of the side member 3 when viewed from above the vehicle. Has been done.
Therefore, according to the vehicle body rear structure of the present embodiment, the bottom of the rear side member 32 receives the load applied to the spring seat 9, and the lower rear pillar member 42, the upper rear pillar member 41, and the wheel house pass through the highly rigid rear side member 32. Since it is transmitted to the peripheral members 7, the load can be distributed to the side sill 2 and the rear floor panel 6B in the peripheral portion, and the load can be distributed to a wide range of the rear part of the vehicle body including the roof member 81.

さらに、本実施形態の車体後部構造において、下側リヤピラーメンバ４２の車両前方側には、リヤホイールハウス１２が設けられており、このリヤホイールハウス１２は、ホイールハウスアウタパネル１２Ａとホイールハウスインナパネル１２Ｂとから構成されている。また、ホイールハウス周辺メンバ７は、ホイールハウスインナパネル１２Ｂの上部外周面に沿って斜め後方上側に延びた形状を有しており、ホイールハウス周辺メンバ７と下側リヤピラーメンバ４２とは、リヤホイールハウス１２に接した状態で接合されている。
したがって、本実施形態の車体後部構造では、リヤホイールハウス１２を構成するホイールハウスアウタパネル１２Ａ及びホイールハウスインナパネル１２Ｂが上部稜線のフランジで接合され、ホイールハウスインナパネル１２Ｂ側にホイールハウス周辺メンバ７の閉断面が形成されているので、リヤホイールハウス１２のフランジ接合部の剛性や、リヤホイールハウス１２の曲面剛性を利用することが可能となり、ホイールハウス周辺メンバ７の剛性を確保できるとともに、ホイールハウス周辺メンバ７に伝達された荷重を周辺部品のメンバやパネルに効率良く分散させることができる。 Further, in the vehicle body rear structure of the present embodiment, a rear wheel house 12 is provided on the vehicle front side of the lower rear pillar member 42, and the rear wheel house 12 includes a wheel house outer panel 12A and a wheel house inner panel 12B. It is composed of and. Further, the wheel house peripheral member 7 has a shape extending diagonally rearward and upward along the upper outer peripheral surface of the wheelhouse inner panel 12B, and the wheelhouse peripheral member 7 and the lower rear pillar member 42 are rear wheels. It is joined in contact with the house 12.
Therefore, in the vehicle body rear structure of the present embodiment, the wheel house outer panel 12A and the wheel house inner panel 12B constituting the rear wheel house 12 are joined by the flange of the upper ridge line, and the wheel house peripheral member 7 is on the wheel house inner panel 12B side. Since the closed cross section is formed, it is possible to utilize the rigidity of the flange joint of the rear wheel house 12 and the rigidity of the curved surface of the rear wheel house 12, and it is possible to secure the rigidity of the member 7 around the wheel house and the wheel house. The load transmitted to the peripheral member 7 can be efficiently distributed to the members and panels of the peripheral parts.

そして、本実施形態の車体後部構造は、サイドシル２の後端部２ａ、リヤサイドメンバ３２の側部３２ｂ（サイドメンバ３の側部）及びホイールハウスインナパネル１２Ｂの前部１２Ｂａ（リヤホイールハウス１２の前部）の３面によって形成される縦方向の筒形状部Ｓを有しているので、筒形状部Ｓの縦方向に延びた壁面が車両上下方向の荷重を伝える剛性を具備することになり、リヤサスペンションブラケット５とリヤサイドメンバ３２とが直接接合されていなくても、リヤサスペンションブラケット５からの荷重をリヤサイドメンバ３２などに効率良く伝えることができ、リヤサイドメンバ３２やリヤホイールハウス１２への荷重負担を低減することができる。 The vehicle body rear structure of the present embodiment includes a rear end portion 2a of the side sill 2, a side portion 32b of the rear side member 32 (side portion of the side member 3), and a front portion 12Ba of the wheel house inner panel 12B (rear wheel house 12). Since it has a vertical tubular shape portion S formed by the three surfaces of the front portion), the wall surface extending in the vertical direction of the tubular shape portion S has rigidity to transmit the load in the vertical direction of the vehicle. Even if the rear suspension bracket 5 and the rear side member 32 are not directly joined, the load from the rear suspension bracket 5 can be efficiently transmitted to the rear side member 32 and the like, and the load on the rear side member 32 and the rear wheel house 12 can be efficiently transmitted. The burden can be reduced.

以上、本発明の実施の形態につき述べたが、本発明は既述の実施の形態に限定されるものではなく、本発明の技術的思想に基づいて各種の変形及び変更が可能である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and modifications can be made based on the technical idea of the present invention.

例えば、既述の実施形態では、リヤピラーメンバ４が上側リヤピラーメンバ４１及び下側リヤピラーメンバ４２の上下２つに分かれた構造となっているが、１つのメンバで構成された構造であっても良い。 For example, in the above-described embodiment, the rear pillar member 4 has a structure in which the upper rear pillar member 41 and the lower rear pillar member 42 are divided into upper and lower parts, but the structure may be composed of one member. ..

１ 車体側部
２ サイドシル
２ａ 後端部
３ サイドメンバ
４ リヤピラーメンバ
５ リヤサスペンションブラケット
６Ａ メインフロアパネル
６Ｂ リヤフロアパネル
７ ホイールハウス周辺メンバ
７ａ 上部
７ｂ 下部
８ 車体上部
９ スプリングシート
１１ リヤドア開口部
１２ リヤホイールハウス
１２Ａ ホイールハウスアウタパネル
１２Ｂ ホイールハウスインナパネル
１２Ｂａ 前部
３１ フロントサイドメンバ
３２ リヤサイドメンバ
３２ａ 下面
３２ｂ 側部
４１ 上側リヤピラーメンバ
４１ａ 上部
４２ 下側リヤピラーメンバ
４２ａ 下部
Ｓ 筒形状部 1 Body side 2 Side sill 2a Rear end 3 Side member 4 Rear pillar member 5 Rear suspension bracket 6A Main floor panel 6B Rear floor panel 7 Wheel house peripheral members 7a Upper 7b Lower 8 Body upper 9 Spring seat 11 Rear door opening 12 Rear wheel house 12A Wheelhouse Outer Panel 12B Wheelhouse Inner Panel 12Ba Front 31 Front Side Member 32 Rear Side Member 32a Bottom 32b Side 41 Upper Rear Pillar Member 41a Upper 42 Lower Rear Pillar Member 42a Lower S Cylindrical Part

Claims (4)

車体側部に設けられるリヤドア開口部と、車体側部の下方に設けられ、車両前後方向に延びるサイドシルと、該サイドシルの車両幅方向内側に設けられ、車両前後方向に延びるサイドメンバと、前記リヤドア開口部の車両後方側に設けられ、前記サイドメンバから立ち上がって配置されるリヤピラーメンバを有し、
前記サイドシル及び前記サイドメンバの下部には、リヤサスペンションを取付けるリヤサスペンションブラケットが設けられている車体後部構造において、
前記リヤピラーメンバの下側の車両前方には、ホイールハウス周辺メンバが設けられており、該ホイールハウス周辺メンバの上部は、前記リヤピラーメンバの下側に接合されているとともに、前記ホイールハウス周辺メンバの下部は、前記サイドシル及び前記サイドメンバに接合され、かつ前記リヤサスペンションブラケットと車両上方視で重なり合って配置されていることを特徴とする車体後部構造。 A rear door opening provided on the side of the vehicle body, a side sill provided below the side of the vehicle body and extending in the vehicle front-rear direction, a side member provided on the inside of the side sill in the vehicle width direction and extending in the vehicle front-rear direction, and the rear door. It has a rear pillar member that is provided on the rear side of the vehicle at the opening and is arranged so as to stand up from the side member.
In the rear structure of the vehicle body, a rear suspension bracket for attaching the rear suspension is provided at the lower part of the side sill and the side member.
A wheel house peripheral member is provided in front of the vehicle below the rear pillar member, and the upper portion of the wheel house peripheral member is joined to the lower side of the rear pillar member and of the wheel house peripheral member. The lower portion is a vehicle body rear structure that is joined to the side sill and the side member and is arranged so as to overlap the rear suspension bracket when viewed from above the vehicle. 前記リヤピラーメンバは、車両上下の位置に設けられる上側リヤピラーメンバ及び下側リヤピラーメンバを有し、前記上側リヤピラーメンバの上部は、車体上部のルーフメンバに接合され、前記下側リヤピラーメンバの下部は、前記サイドメンバの下面に設けられたスプリングシートと車両上方視で重なり合って配置されていることを特徴とする請求項１に記載の車体後部構造。 The rear pillar member has an upper rear pillar member and a lower rear pillar member provided at positions above and below the vehicle, the upper portion of the upper rear pillar member is joined to the roof member of the upper part of the vehicle body, and the lower portion of the lower rear pillar member is The vehicle body rear structure according to claim 1, wherein the spring seats provided on the lower surface of the side member are arranged so as to overlap each other when viewed from above the vehicle. 前記下側リヤピラーメンバの車両前方側には、リヤホイールハウスが設けられ、該リヤホイールハウスは、ホイールハウスアウタパネルとホイールハウスインナパネルとから構成され、前記ホイールハウス周辺メンバは、前記ホイールハウスインナパネルの上部外周面に沿って斜め後方上側に延びた形状を有し、前記ホイールハウス周辺メンバと前記下側リヤピラーメンバとは、前記リヤホイールハウスに接した状態で接合されていることを特徴とする請求項１または２に記載の車体後部構造。 A rear wheel house is provided on the vehicle front side of the lower rear pillar member, the rear wheel house is composed of a wheel house outer panel and a wheel house inner panel, and the wheel house peripheral member is the wheel house inner panel. It has a shape extending diagonally rearward and upward along the upper outer peripheral surface of the wheel house, and the wheel house peripheral member and the lower rear pillar member are joined in a state of being in contact with the rear wheel house. The vehicle body rear structure according to claim 1 or 2. 前記サイドシルの後端部、前記サイドメンバの側部及び前記リヤホイールハウスの前部の３面によって形成される縦方向の筒形状部を有していることを特徴とする請求項１〜３のいずれかに記載の車体後部構造。 Claims 1 to 3 include a longitudinal tubular portion formed by three surfaces of a rear end portion of the side sill, a side portion of the side member, and a front portion of the rear wheel house. The rear structure of the vehicle body described in either.
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