JP5737602B2

JP5737602B2 - Vehicle front structure

Info

Publication number: JP5737602B2
Application number: JP2010196680A
Authority: JP
Inventors: 上田　哲也; 哲也上田
Original assignee: Suzuki Motor Co Ltd
Current assignee: Suzuki Motor Co Ltd
Priority date: 2010-09-02
Filing date: 2010-09-02
Publication date: 2015-06-17
Anticipated expiration: 2030-09-02
Also published as: JP2012051496A

Description

本発明は、車幅方向左右一対のエプロンサイドメンバの間でエンジンを懸架するように、エプロンサイドメンバにエンジンマウントブラケットを取付けている車両の前部構造に関する。 The present invention relates to a vehicle front structure in which an engine mount bracket is attached to an apron side member so that the engine is suspended between a pair of apron side members on the left and right sides in the vehicle width direction.

最近の車両には、車両に加えられる荷重を吸収することが要求されており、特に、車両前方からの荷重を吸収することが重要となっている。そこで、主に車幅方向左右一対のエプロンサイドメンバによって前方からの荷重を吸収する車両の前部構造が広く採用されている。また、多くの場合、エプロンサイドメンバによってエンジンが支持されている。このエンジン支持については、エプロンサイドメンバにエンジンマウントブラケットが取付けられ、このエンジンマウントブラケットによって車幅方向左右一対のエプロンサイドメンバの間にエンジンが懸架されている。 Recent vehicles are required to absorb the load applied to the vehicle, and in particular, it is important to absorb the load from the front of the vehicle. Therefore, a vehicle front structure that absorbs a load from the front mainly by a pair of left and right apron side members in the vehicle width direction is widely adopted. In many cases, the engine is supported by an apron side member. Regarding the engine support, an engine mount bracket is attached to the apron side member, and the engine is suspended between the pair of apron side members in the vehicle width direction by the engine mount bracket.

このような従来の構造として、例えば、特許文献１では、車両前後方向に延びるエプロンサイドメンバに、車両前後方向に間隔を空けて２つのマウントブラケットが取付けられ、これら２つのマウントブラケットによって支持されるエンジンマウントを介してエンジンが一対のエプロンサイドメンバの間に懸架されている。 As such a conventional structure, for example, in Patent Document 1, two mount brackets are attached to an apron side member extending in the vehicle front-rear direction at an interval in the vehicle front-rear direction and supported by these two mount brackets. The engine is suspended between the pair of apron side members via the engine mount.

また、エプロンサイドメンバの車幅方向外側には前輪が配置されており、車両操舵の際に前輪を旋回可能とする空間を確保すべく、エプロンサイドメンバが車幅方向内側に向かって湾曲して形成されて、エプロンサイドメンバの横断面積が減少することがある。この場合、エプロンサイドメンバの湾曲部の剛性が低下してしまう。そこで、このような湾曲部の剛性を高めるために、エプロンサイドメンバの閉断面の面積を増加させること、又は補強部材を追加することが行なわれている。 In addition, the front wheels are arranged on the outer side in the vehicle width direction of the apron side member, and the apron side member is curved toward the inner side in the vehicle width direction so as to secure a space where the front wheel can turn during vehicle steering. As a result, the cross-sectional area of the apron side member may be reduced. In this case, the rigidity of the curved portion of the apron side member is lowered. Therefore, in order to increase the rigidity of such a curved portion, the area of the closed cross section of the apron side member is increased or a reinforcing member is added.

一方で、車両を船積み等する際には車両前端部にフックが掛けられて、車両前端部が前方斜め下方及び後方斜め下方に向かって引っ張られることがある。 On the other hand, when a vehicle is loaded or the like, a hook is hung on the front end portion of the vehicle, and the front end portion of the vehicle may be pulled toward the front diagonally downward and the rear diagonally downward.

特開２００５−２２５３６０号公報JP 2005-225360 A

しかしながら、特許文献１のような従来の構造は、エプロンサイドメンバにおけるエンジン支持部周辺のみによって、前方からの荷重を吸収するように構成されているにすぎない。特に、エプロンサイドメンバについては、剛性が高すぎる場合、荷重を十分に吸収し得る状態までエプロンサイドメンバが十分に変形しなくなる一方で、剛性が低すぎる場合、荷重を十分に吸収する前にエプロンサイドメンバが完全に変形してしまうという問題がある。このような問題を鑑みると、特許文献１の構造では、エンジン支持部以外の部分を含む車両の前部全体を効果的に変形させて、前方からの荷重を効率良く吸収することができない。 However, the conventional structure like Patent Document 1 is configured only to absorb the load from the front only by the periphery of the engine support portion of the apron side member. In particular, for the apron side member, if the rigidity is too high, the apron side member will not be sufficiently deformed to a state where the load can be sufficiently absorbed, while if the rigidity is too low, the apron before the load is sufficiently absorbed. There is a problem that the side member is completely deformed. In view of such a problem, in the structure of Patent Document 1, the entire front portion of the vehicle including a portion other than the engine support portion cannot be effectively deformed to efficiently absorb the load from the front.

従来の構造にてエプロンサイドメンバの湾曲部の剛性を高めるために、エプロンサイドメンバの閉断面の面積を増加させた場合、エプロンサイドメンバと他部品との間のクリアランスが不十分となる。そのため、エプロンサイドメンバ周辺における部品の取付け作業性が低下して、生産効率が低下することとなる。エプロンサイドメンバの湾曲部の剛性を高めるために、補強部材を追加した場合、車両重量が増加し、補強部材の取付作業の追加により生産効率が低下することとなる。 When the area of the closed cross section of the apron side member is increased in order to increase the rigidity of the curved portion of the apron side member in the conventional structure, the clearance between the apron side member and other parts becomes insufficient. Therefore, the mounting workability of parts around the apron side member is lowered, and the production efficiency is lowered. When a reinforcing member is added to increase the rigidity of the curved portion of the apron side member, the vehicle weight increases, and the production efficiency decreases due to the addition of the reinforcing member mounting operation.

さらに、船積み等の際に車両前端部にフックが掛けられて、車両前端部が引っ張られた場合、エプロンサイドメンバには前方斜め下方及び後方斜め下方に向かって荷重が加えられることになる。この場合、エプロンサイドメンバが曲げ変形して、エプロンサイドメンバの上部に引張り応力が加えられ、エプロンサイドメンバの下部に圧縮応力が加えられることとなる。しかしながら、従来の構造では、エプロンサイドメンバ全体の曲げ変形に対する強度が考慮されておらず、十分な曲げ強度が得られない。 Further, when the front end of the vehicle is hooked and the front end of the vehicle is pulled during shipping or the like, a load is applied to the apron side member toward the front diagonally downward and the rear diagonally downward. In this case, the apron side member is bent and deformed, a tensile stress is applied to the upper part of the apron side member, and a compressive stress is applied to the lower part of the apron side member. However, in the conventional structure, the strength of the entire apron side member with respect to bending deformation is not considered, and sufficient bending strength cannot be obtained.

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、生産効率を低下させず、車両重量を増加させず、かつ前方斜め下方及び後方斜め下方に向かって車両の前端部を引張る荷重に対して十分な強度を確保しながら、前方から車両に加えられる荷重を効率的に吸収できる車両の前部構造を提供することにある。 The present invention has been made in view of such a situation, and the object thereof is not to reduce the production efficiency, increase the vehicle weight, and to the front end portion of the vehicle toward the front diagonally downward and the rear diagonally downward. An object of the present invention is to provide a vehicle front structure that can efficiently absorb a load applied to a vehicle from the front while securing a sufficient strength against a load that pulls the vehicle.

課題を解決するために、本発明の車両の前部構造は、車両前後方向に沿って配置され、かつ車幅方向左右一対に設けられるエプロンサイドメンバと、前記一対のエプロンサイドメンバの間にてエンジンを懸架するように、前記エプロンサイドメンバの上部に取付けられるエンジンマウントブラケットとを備え、前記エプロンサイドメンバが車両前後方向に前部、中間部及び後部に三分割されて、前記前部、中間部及び後部の互いに隣接する部分がそれぞれ結合され、前記エプロンサイドメンバの中間部が、その車幅方向外側に配置される外側部材と、その車幅方向内側に配置される内側部材とを有し、前記外側部材及び内側部材の下部にそれぞれ形成されるフランジが互いに重なって接合されており、前記外側部材及び内側部材のフランジのいずれか一方が横断面Ｌ字状に形成され、前記外側部材及び内側部材のフランジが、前記エンジンマウントブラケットに対して上下方向に重なって配置されている、車両の前部構造において、前記エプロンサイドメンバの中間部における外側部材の横断面が車幅方向内側に向かって湾曲する略円弧形状に形成され、前記エプロンサイドメンバの中間部に用いる板材の肉厚を前記エプロンサイドメンバの前部及び後部に用いる板材の肉厚より厚くすること、前記中間部に用いる材料の剛性を前記前部及び後部に用いる材料の剛性より高くすること、並びに前記中間部に絞り構造を設けることの少なくとも１つによって、前記中間部の剛性が前記前部及び後部の剛性より高く設定されており、前記エンジンマウントブラケットが、前記エプロンサイドメンバの前部及び中間部に跨って取付けられている。 In order to solve the problem, a front structure of a vehicle according to the present invention is provided between an apron side member disposed along a vehicle front-rear direction and provided in a pair of left and right in the vehicle width direction, and the pair of apron side members. to suspend the engine, e Bei an engine mount bracket which is mounted on top of the apron side member, the apron side member is tripartite front, the middle portion and rear in the longitudinal direction of the vehicle, said front, Adjacent portions of the intermediate portion and the rear portion are coupled to each other, and the intermediate portion of the apron side member has an outer member disposed on the outer side in the vehicle width direction and an inner member disposed on the inner side in the vehicle width direction. And flanges formed at lower portions of the outer member and the inner member are joined to each other, and the flanges of the outer member and the inner member are joined together. Deviation or the other is formed in cross section L-shaped, wherein the flange of the outer member and inner member are arranged to overlap in a vertical direction with respect to the engine mount bracket, the front structure of the vehicle, the apron side The cross section of the outer member in the middle part of the member is formed in a substantially arc shape that curves inward in the vehicle width direction, and the thickness of the plate material used in the middle part of the apron side member is the front part and rear part of the apron side member At least one of thickening the thickness of the plate material used for the intermediate portion, making the rigidity of the material used for the intermediate portion higher than the rigidity of the material used for the front portion and the rear portion, and providing a diaphragm structure in the intermediate portion. the stiffness of the intermediate portion is set higher than the front and rear rigidity, the engine mount bracket, the Epuronsa It is attached across the front and middle portion of Domenba.

本発明の車両の前部構造では、前記エプロンサイドメンバの前部、中間部及び後部が結合された状態で、前記エプロンサイドメンバの外周が平滑となっている。 In the front structure of the vehicle according to the present invention, the outer periphery of the apron side member is smooth in a state where the front portion, the middle portion, and the rear portion of the apron side member are coupled.

本発明の車両の前部構造では、前記エプロンサイドメンバの前部、中間部及び後部における互いに隣接する部分の少なくとも１つが、テーラードブランク溶接により接合されている。 In the vehicle front structure according to the present invention, at least one of the apron side member adjacent to each other at the front, middle, and rear thereof is joined by tailored blank welding.

本発明の車両の前部構造では、前記エプロンサイドメンバの中間部前端及び後端の少なくとも一方、又は前記エプロンサイドメンバの前部後端及び前記エプロンサイドメンバの後部前端の少なくとも一方に、前記エプロンサイドメンバの横断面中央に向かってオフセットする結合用フランジが形成され、前記結合用フランジが、隣接する前記エプロンサイドメンバの前部、中間部又は後部と重なって接合されている。 In the vehicle front structure according to the present invention, the apron is provided on at least one of the front front end and the rear end of the apron side member, or at least one of the front rear end of the apron side member and the rear front end of the apron side member. A coupling flange that is offset toward the center of the cross section of the side member is formed, and the coupling flange is joined to overlap the front, middle, or rear part of the adjacent apron side member.

本発明によれば、以下の効果を得ることができる。
本発明の車両の前部構造は、車両前後方向に沿って配置され、かつ車幅方向左右一対に設けられるエプロンサイドメンバと、前記一対のエプロンサイドメンバの間にてエンジンを懸架するように、前記エプロンサイドメンバの上部に取付けられるエンジンマウントブラケットとを備え、前記エプロンサイドメンバが車両前後方向に前部、中間部及び後部に三分割されて、前記前部、中間部及び後部の互いに隣接する部分がそれぞれ結合され、前記エプロンサイドメンバの中間部が、その車幅方向外側に配置される外側部材と、その車幅方向内側に配置される内側部材とを有し、前記外側部材及び内側部材の下部にそれぞれ形成されるフランジが互いに重なって接合されており、前記外側部材及び内側部材のフランジのいずれか一方が横断面Ｌ字状に形成され、前記外側部材及び内側部材のフランジが、前記エンジンマウントブラケットに対して上下方向に重なって配置されている、車両の前部構造において、前記エプロンサイドメンバの中間部における外側部材の横断面が車幅方向内側に向かって湾曲する略円弧形状に形成され、前記エプロンサイドメンバの中間部に用いる板材の肉厚を前記エプロンサイドメンバの前部及び後部に用いる板材の肉厚より厚くすること、前記中間部に用いる材料の剛性を前記前部及び後部に用いる材料の剛性より高くすること、並びに前記中間部に絞り構造を設けることの少なくとも１つによって、前記中間部の剛性が前記前部及び後部の剛性より高く設定されており、前記エンジンマウントブラケットが、前記エプロンサイドメンバの前部及び中間部に跨って取付けられている。
そのため、前方からの荷重が加えられた場合には、前記エプロンサイドメンバの前部が最初に変形し、次に前記エプロンサイドメンバの後部が変形することになる。さらに、前記エンジン、前記エンジンマウントブラケット等が、剛性の高い前記エプロンサイドメンバの中間部とともに後方に平行移動する。そして、最終的に残った荷重が前記エプロンサイドメンバの中間部の変形によって吸収されることとなる。このような変形によって、前方からの荷重が効率的に吸収されることになる。
特に、前記エプロンサイドメンバの車幅方向外側には前輪が配置されることが多くなっているが、これに対して、本発明では、前輪を旋回可能とする空間を確保すべく、前記エプロンサイドメンバの中間部が車幅方向内側に向かって湾曲して形成される一方で、前記エプロンサイドメンバの中間部の剛性が他の部分よりも高く設定されることによって、湾曲部の剛性低下を防止できる。従って、湾曲部を補強するために従来のように前記エプロンサイドメンバの閉断面積を増加させる必要がなく、前記エプロンサイドメンバと他部品とのクリアランスを十分に確保でき、前記エプロンサイドメンバ周辺における部品の取付け作業性が低下せず、生産効率が低下することもない。さらに、湾曲部を補強するために従来のように補強部品を追加していないので、車両重量が増加せず、かつ追加した補強部品の取付けによって生産効率が低下しない。
前記エプロンサイドメンバの上部に取付けられる前記エンジンマウントブラケットが、前記エプロンサイドメンバの前部及び中間部に跨って取付けられているので、前記エプロンサイドメンバの結合部分の上側が特に補強されている。従って、船積み等の際に車両前端部にフックが掛けられて、車両前端部に前方斜め下方及び後方斜め下方に向かう荷重が加えられた場合、このような荷重により発生する前記エプロンサイドメンバの曲げ変形に対する強度が、高められることとなる。
よって、本発明の車両の前部構造は、生産効率を低下させず、車両重量を増加させず、かつ前方斜め下方及び後方斜め下方に向かって車両の前端部を引張る荷重に対して十分な強度を確保しながら、車両前方から車両に加えられる荷重を効率的に吸収できる。 According to the present invention, the following effects can be obtained.
The front structure of the vehicle of the present invention is arranged along an apron side member arranged along the vehicle front-rear direction and provided in a pair of left and right in the vehicle width direction, and the engine is suspended between the pair of apron side members. the example Bei an engine mount bracket which is mounted on top of the apron side members, said apron side member front portion longitudinal direction of the vehicle, is divided into three parts in the intermediate portion and a rear, said front, middle portion and rear portion of the adjacent The apron side member has an outer member disposed on the outer side in the vehicle width direction and an inner member disposed on the inner side in the vehicle width direction. The flanges respectively formed on the lower part of the member are overlapped and joined to each other, and either the outer member or the flange of the inner member has a transverse section L Jo to be formed, the flange of the outer member and the inner member, the are arranged to overlap in the vertical direction with respect to the engine mount bracket, the front structure of the vehicle, the outer member in the middle portion of the apron side member The cross section is formed in a substantially arc shape that curves inward in the vehicle width direction, and the thickness of the plate material used for the intermediate portion of the apron side member is thicker than the thickness of the plate material used for the front and rear portions of the apron side member. to it, to be higher than the rigidity of the material used the rigidity of the material used for the intermediate portion to the front and rear, and by at least one providing a diaphragm structure to the intermediate portion, rigidity of the intermediate portion It is set higher than the rigidity of the front part and the rear part, and the engine mount bracket is connected to the front part and the middle part of the apron side member. It is mounted across the department.
Therefore, when a load from the front is applied, the front part of the apron side member is deformed first, and then the rear part of the apron side member is deformed. Further, the engine, the engine mount bracket, and the like translate rearward together with the middle portion of the apron side member having high rigidity. The finally remaining load is absorbed by the deformation of the intermediate part of the apron side member. Due to such deformation, the load from the front is efficiently absorbed.
In particular, front wheels are often arranged on the outer side in the vehicle width direction of the apron side member . On the other hand, in the present invention, the apron side is secured in order to secure a space in which the front wheels can turn. While the middle part of the member is formed to bend inward in the vehicle width direction, the rigidity of the middle part of the apron side member is set higher than other parts, thereby preventing the rigidity of the curved part from being lowered. it can. Therefore, it is not necessary to increase the closed cross-sectional area of the apron side member as in the prior art in order to reinforce the curved portion, the clearance between the apron side member and other parts can be sufficiently secured, and the apron side member around The mounting workability of parts does not deteriorate, and the production efficiency does not decrease. Further, since reinforcing parts are not added as in the prior art to reinforce the curved portion, the vehicle weight does not increase, and the production efficiency is not lowered by attaching the added reinforcing parts.
The engine mount bracket attached to the upper portion of the apron side member, since the are attached taken across the front and middle portion of the apron side member, the upper coupling portion of the apron side members are specifically reinforced . Therefore, when a hook is hung on the front end of the vehicle during loading or the like and a load is applied to the front end of the vehicle toward the front diagonally downward and rearward diagonally downward, the apron side member bending caused by such a load is applied. The strength against deformation is increased.
Therefore, the vehicle front structure according to the present invention does not decrease the production efficiency, does not increase the vehicle weight, and has sufficient strength against the load that pulls the front end of the vehicle toward the front diagonally downward and the rear diagonally downward. The load applied to the vehicle from the front of the vehicle can be efficiently absorbed while ensuring the above.

また、本発明の車両の前部構造では、前記エプロンサイドメンバの中間部が、その車幅方向外側に配置される外側部材と、その車幅方向内側に配置される内側部材とを有し、前記外側部材及び内側部材の下部にそれぞれ形成されるフランジが互いに重なって接合されており、前記外側部材及び内側部材のフランジのいずれか一方が横断面Ｌ字状に形成され、前記外側部材及び内側部材のフランジが、前記エンジンマウントブラケットに対して上下方向に重なって配置されているので、前記エプロンサイドメンバの曲げ変形に対する強度が向上することとなる。従って、船積み等の際に車両前端部にフックが掛けられて、車両前端部に前方斜め下方に向かう荷重が加えられた場合、このような荷重により発生する前記エプロンサイドメンバの曲げ変形に対する強度が、さらに高められることとなる。
Further, in the vehicle front structure according to the present invention, the apron side member has an intermediate portion disposed on the outer side in the vehicle width direction and an inner member disposed on the inner side in the vehicle width direction. The flanges formed at the lower portions of the outer member and the inner member are joined to each other, and either one of the flanges of the outer member and the inner member is formed in an L-shaped cross section, and the outer member and the inner member Since the flange of the member is disposed so as to overlap in the vertical direction with respect to the engine mount bracket, the strength of the apron side member against bending deformation is improved. Therefore, when a hook is hung on the front end of the vehicle during shipping or the like, and a load is applied to the front end of the vehicle obliquely forward and downward, the strength of the apron side member against bending deformation caused by such a load is increased. It will be further enhanced.

本発明の車両の前部構造では、前記エプロンサイドメンバの前部、中間部及び後部が結合された状態で、前記エプロンサイドメンバの外周が平滑となっているので、エンジンマウントブラケット、エプロンサイドパネル等の取付部品を取付ける前記エプロンサイドメンバの取付面に、段差及び大きなうねり等の大きな形状変化がなくなる。そのため、これらの取付部品を容易かつ確実に前記エプロンサイドメンバに取付けることができ、生産効率を向上させることができる。また、取付部品と前記エプロンサイドメンバとの間に意図しない隙間が生じることを防止でき、このような隙間によって前記エプロンサイドメンバ周辺の車体剛性が変化することを防止できる。よって、前方からの荷重を確実かつ効率的に吸収でき、かつ前記エプロンサイドメンバの曲げ変形に対する強度を確実に高めることができる。 In the vehicle front structure according to the present invention, since the outer periphery of the apron side member is smooth with the front part, the middle part, and the rear part of the apron side member joined together, the engine mount bracket, the apron side panel A large shape change such as a step and a large swell is eliminated on the mounting surface of the apron side member to which the mounting parts such as the above are attached. Therefore, these attachment parts can be easily and reliably attached to the apron side member, and the production efficiency can be improved. Further, it is possible to prevent an unintended gap between the attachment part and the apron side member, and it is possible to prevent the vehicle body rigidity around the apron side member from changing due to such a gap. Therefore, the load from the front can be reliably and efficiently absorbed, and the strength against bending deformation of the apron side member can be reliably increased.

本発明の車両の前部構造では、前記エプロンサイドメンバの前部、中間部及び後部における互いに隣接する部分の少なくとも１つが、テーラードブランク溶接により接合されているので、前記エプロンサイドメンバの外周を確実に平滑にすることができる。さらに、テーラードブランク溶接による結合部分では応力集中が発生し難いので、前記エプロンサイドメンバの中間部周辺の剛性を低下させず、前方からの荷重を効率的に吸収でき、かつ前記エプロンサイドメンバの曲げ変形に対する強度をさらに高めることができる。 In the vehicle front structure according to the present invention, since at least one of the apron side member adjacent to each other in the front, middle and rear portions is joined by tailored blank welding, the outer periphery of the apron side member can be reliably secured. Can be smoothed. Furthermore, since stress concentration is unlikely to occur in the jointed portion by tailored blank welding, the load from the front can be efficiently absorbed without lowering the rigidity around the middle portion of the apron side member, and the apron side member can be bent. The strength against deformation can be further increased.

本発明の車両の前部構造では、前記エプロンサイドメンバの中間部前端及び後端の少なくとも一方、又は前記エプロンサイドメンバの前部後端及び前記エプロンサイドメンバの後部前端の少なくとも一方に、前記エプロンサイドメンバの横断面中央に向かってオフセットする結合用フランジが形成され、前記結合用フランジが、隣接する前記エプロンサイドメンバの前部、中間部又は後部と重なって接合されているので、前記エプロンサイドメンバの外周を確実に平滑にすることができる。特に、前記エプロンサイドメンバの中間部前端及び後端の少なくとも一方に前記エプロンサイドメンバの横断面中央に向かってオフセットする前記結合用フランジが形成され、前記結合用フランジが隣接する前記エプロンサイドメンバの前部又は後部と重なって接合される場合、剛性の高い前記中間部によって前記前部又は後部が支持されることとなる。そのため、前記エプロンサイドメンバの折れ変形が減少して、前記エプロンサイドメンバが確実に前後方向に潰れるように変形することとなる。その結果、前方からの荷重を効率的に吸収できる。また、剛性の高い前記中間部によって前記前部又は後部が支持されることによって、前記エプロンサイドメンバの曲げ変形に対する強度をさらに高めることができる。 In the vehicle front structure according to the present invention, the apron is provided on at least one of the front front end and the rear end of the apron side member, or at least one of the front rear end of the apron side member and the rear front end of the apron side member. A coupling flange that is offset toward the center of the cross-section of the side member is formed, and the coupling flange is joined to overlap the front, middle, or rear of the adjacent apron side member. The outer periphery of the member can be surely smoothed. In particular, at least one of the front end and the rear end of the apron side member of the apron side member is formed with the coupling flange that is offset toward the center of the cross section of the apron side member, and the apron side member is adjacent to the apron side member. When the front part or the rear part is overlapped and joined, the front part or the rear part is supported by the intermediate part having high rigidity. Therefore, the bending deformation of the apron side member is reduced, and the apron side member is deformed so as to be surely crushed in the front-rear direction. As a result, the load from the front can be absorbed efficiently. In addition, since the front portion or the rear portion is supported by the intermediate portion having high rigidity, the strength of the apron side member against bending deformation can be further increased.

本発明の第１実施形態について、エンジン等の周辺部品を省略した状態の車両の前部構造を車両左前方斜め上方から見た概略斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view of a front structure of a vehicle in a state in which peripheral components such as an engine are omitted according to a first embodiment of the present invention, as viewed obliquely from the upper left front of the vehicle. 本発明の第１実施形態について、エプロンサイドメンバの周辺を車両右前方から見た概略斜視図である。It is the schematic perspective view which looked at the periphery of the apron side member from the vehicle right front about 1st Embodiment of this invention. 本発明の第１実施形態について、車幅方向右側のエプロンサイドメンバと右前輪との位置関係を示す概略底面図である。It is a schematic bottom view showing the positional relationship between the apron side member on the right side in the vehicle width direction and the right front wheel in the first embodiment of the present invention. 本発明の第１実施形態について、図１のＡ部を拡大し、かつＡ部の要部断面を示した斜視図である。It is the perspective view which expanded the A section of FIG. 1 and showed the principal part cross section of the A section about 1st Embodiment of this invention. 本発明の第１実施形態に係る図４のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 4 which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る図４のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 4 which concerns on 2nd Embodiment of this invention.

［第１実施形態］
図１〜図５を参照して、本発明の第１実施形態に係る車両の前部構造１について説明する。
図１及び図２を参照すると、車両の前部構造１には、車幅方向左右一対のエプロンサイドメンバ（以下、「サイドメンバ」という）２、及びエプロンサイドメンバ２の上部に取付けられるエンジンマウントブラケット（以下、「マウントブラケット」という）３が設けられている。車両のエンジン（図示せず）は、マウントブラケット３によって一対のサイドメンバ２の間で懸架されている。一対のサイドメンバ２の車幅方向外側には、それぞれ前輪４が配置されている。 [First Embodiment]
With reference to FIGS. 1-5, the front part structure 1 of the vehicle which concerns on 1st Embodiment of this invention is demonstrated.
Referring to FIGS. 1 and 2, a vehicle front structure 1 includes a pair of left and right apron side members (hereinafter referred to as “side members”) 2 in the vehicle width direction, and an engine mount attached to the top of the apron side member 2. A bracket (hereinafter referred to as “mount bracket”) 3 is provided. A vehicle engine (not shown) is suspended between the pair of side members 2 by a mount bracket 3. Front wheels 4 are respectively arranged on the outer sides in the vehicle width direction of the pair of side members 2.

図１〜図５を参照して、サイドメンバ２について説明する。
サイドメンバ２は、車両前後方向に沿って配置されている。サイドメンバ２は、その車両前後方向にて前部５、中間部６、及び後部７に三分割されている。前部５と中間部６との互いに隣接する部分が結合され、中間部６と後部７との互いに隣接する部分が結合されている。中間部６に用いられる板材の肉厚は、前部５及び後部７に用いられる板材の肉厚よりも厚くなっており、中間部６の剛性は、前部５及び後部７の剛性よりも高く設定されている。 The side member 2 will be described with reference to FIGS.
The side member 2 is disposed along the vehicle front-rear direction. The side member 2 is divided into a front part 5, an intermediate part 6, and a rear part 7 in the vehicle longitudinal direction. The adjacent portions of the front portion 5 and the intermediate portion 6 are joined together, and the adjacent portions of the intermediate portion 6 and the rear portion 7 are joined together. The thickness of the plate material used for the intermediate portion 6 is thicker than the thickness of the plate material used for the front portion 5 and the rear portion 7, and the rigidity of the intermediate portion 6 is higher than the rigidity of the front portion 5 and the rear portion 7. Is set.

サイドメンバ２の中間部６の詳細を説明する。図１〜図３に示すように、サイドメンバ２の中間部６は、車両操舵の際に前輪４が旋回する空間を確保するように、車幅方向内側に向かって湾曲して形成されている。図４に示すように、中間部６は、その車幅方向外側に配置される外側部材８と、その車幅方向内側に配置される内側部材９とを有している。中間部６の閉断面は、外側部材８及び内側部材９によって形成されている。外側部材８は、横断面視で車幅方向内側に湾曲する略円弧状に形成されており、外側部材の下端部には略直線状のフランジ８ａが設けられている。内側部材９は、横断面視で車幅方向内側に向かって突出する略ハット形状に形成されており、内側部材９の下端部には、横断面略Ｌ字状のフランジ９ａが設けられている。外側部材８のフランジ８ａと内側部材９のフランジ９ａとは、重ねられており、スポット溶接によって互いに接合されている。 Details of the intermediate portion 6 of the side member 2 will be described. As shown in FIGS. 1 to 3, the intermediate portion 6 of the side member 2 is formed to be curved inward in the vehicle width direction so as to secure a space for the front wheel 4 to turn during vehicle steering. . As shown in FIG. 4, the intermediate portion 6 includes an outer member 8 disposed on the outer side in the vehicle width direction, and an inner member 9 disposed on the inner side in the vehicle width direction. The closed cross section of the intermediate portion 6 is formed by the outer member 8 and the inner member 9. The outer member 8 is formed in a substantially arc shape that curves inward in the vehicle width direction in a cross-sectional view, and a substantially linear flange 8a is provided at the lower end portion of the outer member. The inner member 9 is formed in a substantially hat shape that protrudes inward in the vehicle width direction when viewed in cross section, and a flange 9 a having a substantially L-shaped cross section is provided at the lower end portion of the inner member 9. . The flange 8a of the outer member 8 and the flange 9a of the inner member 9 are overlapped and joined to each other by spot welding.

サイドメンバ２の前部５及び中間部６の結合部分と、サイドメンバ２の中間部６及び後部７の結合部分とについて説明する。図５に示すように、中間部６後端と後部７前端とはテーラードブランク溶接によって接合されている。また、特に図示はしないが、前部５後端と中間部６前端とも同様にテーラードブランク溶接によって接合されている。そのため、サイドメンバ２の前部５、中間部６、及び後部７の隣接する部分を結合した状態で、サイドメンバ２の外周は平滑となっており、サイドメンバ２の外周には段差及び大きなうねり等の大きな形状変化がなくなっている。 The joint part of the front part 5 and the intermediate part 6 of the side member 2 and the joint part of the intermediate part 6 and the rear part 7 of the side member 2 will be described. As shown in FIG. 5, the rear end of the intermediate portion 6 and the front end of the rear portion 7 are joined by tailored blank welding. Moreover, although not shown in particular, the rear end of the front part 5 and the front end of the intermediate part 6 are similarly joined by tailored blank welding. Therefore, the outer periphery of the side member 2 is smooth with the adjacent portions of the front portion 5, the intermediate portion 6, and the rear portion 7 of the side member 2 joined together, and there are steps and large undulations on the outer periphery of the side member 2. The big shape change such as.

図１、図２、及び図４を参照して、マウントブラケット３について説明する。
マウントブラケット３には車両前後方向にサイドメンバ２に沿って延びる基部３ａが設けられ、該基部３の上側部分には前側取付部３ｂと、後側取付部３ｃとが設けられている。前側取付部３ｂと後側取付部３ｃとは、前後方向に間隔を空けて配置され、連結部３ｄによって連結されており、連結部３ｄは、前側取付部３ｂ及び後側取付部３ｃに対して凹むように形成されている。このような前側取付部３ｂ及び後側取付部３ｃが、エンジン（図示せず）の取付けに用いられる。 The mount bracket 3 will be described with reference to FIGS. 1, 2, and 4.
The mount bracket 3 is provided with a base portion 3a extending along the side member 2 in the vehicle front-rear direction. A front side attachment portion 3b and a rear side attachment portion 3c are provided on the upper portion of the base portion 3. The front mounting portion 3b and the rear mounting portion 3c are arranged at an interval in the front-rear direction and are connected by a connecting portion 3d. The connecting portion 3d is connected to the front mounting portion 3b and the rear mounting portion 3c. It is formed to be recessed. Such a front mounting portion 3b and a rear mounting portion 3c are used for mounting an engine (not shown).

マウントブラケット３の基部３ａは、サイドメンバ２の中間部６と後部７とに跨って配置されており、サイドメンバ２とマウントブラケット３の基部３ａとがスポット溶接により接合されている。このとき、マウントブラケット３の前側取付部３ｂはサイドメンバ２の中間部６の上側部分に位置し、マウントブラケット３の後側取付部３ｃはサイドメンバ２の後部７の上側部分に位置している。そのため、サイドメンバ２の中間部６及び後部７の上側部分に対して、それぞれ同じようにエンジンの重量が上方から加えられる構成となっている。そのため、船積み等の際に車両前端部にフックが掛けられて、車両前端部に前方斜め下方及び後方斜め下方に向かう荷重が加えられた場合、このような荷重により発生するサイドメンバ２の曲げ変形に対する強度が、より効率的に高められることとなる。また、マウントブラケット３は、外側部材８のフランジ８ａ及び内側部材９のフランジ９ａに対して上下方向に重なって配置されている。このようなマウントブラケット３によって、エンジンが一対のサイドメンバ２の間にて懸架されることとなる。 The base 3a of the mount bracket 3 is disposed across the intermediate part 6 and the rear part 7 of the side member 2, and the side member 2 and the base 3a of the mount bracket 3 are joined by spot welding. At this time, the front mounting portion 3b of the mounting bracket 3 is positioned on the upper portion of the intermediate portion 6 of the side member 2, and the rear mounting portion 3c of the mounting bracket 3 is positioned on the upper portion of the rear portion 7 of the side member 2. . Therefore, the weight of the engine is similarly applied to the upper portion of the intermediate portion 6 and the rear portion 7 of the side member 2 from above. Therefore, when a load is applied to the front end portion of the vehicle, such as when the vehicle front end portion is hooked, and the vehicle front end portion is directed obliquely forward and downward and rearward and obliquely downward, the bending deformation of the side member 2 caused by such a load is generated. The strength against is increased more efficiently. The mount bracket 3 is disposed so as to overlap the flange 8a of the outer member 8 and the flange 9a of the inner member 9 in the vertical direction. With such a mounting bracket 3, the engine is suspended between the pair of side members 2.

このような本発明の第１実施形態に係る車両の前部構造において、車両の前方から荷重が加えられた場合の作用を説明する。
車両に前方からの荷重が加えられた場合、サイドメンバ２の前部５が最初に変形し、次にサイドメンバ２の後部７が変形することになる。さらに、エンジン、マウントブラケット３等が、剛性の高いサイドメンバ２の中間部６とともに後方に平行移動する。そして、最終的に残った荷重がサイドメンバ２の中間部６の変形によって吸収されることとなる。 In the vehicle front structure according to the first embodiment of the present invention, the operation when a load is applied from the front of the vehicle will be described.
When a load from the front is applied to the vehicle, the front portion 5 of the side member 2 is deformed first, and then the rear portion 7 of the side member 2 is deformed. Further, the engine, the mount bracket 3 and the like translate rearward together with the intermediate portion 6 of the highly rigid side member 2. Then, the finally remaining load is absorbed by the deformation of the intermediate portion 6 of the side member 2.

以上のように本発明の第１実施形態によれば、上述した作用のように車両の前部構造１が変形することによって、前方からの荷重が効率的に吸収されることになる。
サイドメンバ２の車幅方向外側には前輪４が配置されて、前輪４を旋回可能とする空間を確保すべく、サイドメンバ２の中間部６が車幅方向内側に向かって湾曲して形成された場合に、サイドメンバ２の中間部６の剛性が他の部分よりも高く設定されることによって、湾曲部の剛性低下を防止できる。従って、湾曲部を補強するために従来のようにサイドメンバの閉断面積を増加させる必要がなく、サイドメンバ２と他部品とのクリアランスを十分に確保でき、サイドメンバ２周辺における部品の取付け作業性が低下せず、生産効率が低下することもない。さらに、湾曲部を補強するために従来のように補強部品を追加していないので、車両重量が増加せず、かつ追加した補強部品の取付けによって生産効率が低下しない。
サイドメンバ２の上部に取付けられるマウントブラケット３が、サイドメンバ２の前部５及び中間部６に跨って取付けられているので、サイドメンバ２の結合部分の上側が特に補強されている。従って、船積み等の際に車両前端部にフックが掛けられて、車両前端部に前方斜め下方及び後方斜め下方に向かう荷重が加えられた場合、このような荷重により発生するサイドメンバ２の曲げ変形に対する強度が、高められることとなる。
よって、本発明の車両の前部構造１は、生産効率を低下させず、車両重量を増加させず、かつ前方斜め下方及び後方斜め下方に向かって車両の前端部を引張る荷重に対して十分な強度を確保しながら、前方から車両に加えられる荷重を効率的に吸収できる。 As described above, according to the first embodiment of the present invention, the load from the front is efficiently absorbed by the deformation of the front structure 1 of the vehicle as described above.
A front wheel 4 is disposed on the outer side in the vehicle width direction of the side member 2, and an intermediate portion 6 of the side member 2 is formed to be curved inward in the vehicle width direction so as to secure a space that allows the front wheel 4 to turn. In this case, the rigidity of the curved portion can be prevented from being lowered by setting the rigidity of the intermediate portion 6 of the side member 2 higher than that of the other portions. Therefore, it is not necessary to increase the closed cross-sectional area of the side member as in the prior art in order to reinforce the curved portion, and a sufficient clearance between the side member 2 and other parts can be secured, and the parts are attached around the side member 2. The productivity is not lowered and the production efficiency is not lowered. Further, since reinforcing parts are not added as in the prior art to reinforce the curved portion, the vehicle weight does not increase, and the production efficiency is not lowered by attaching the added reinforcing parts.
Since the mount bracket 3 attached to the upper part of the side member 2 is attached across the front part 5 and the intermediate part 6 of the side member 2, the upper side of the coupling part of the side member 2 is particularly reinforced. Therefore, when a load is applied to the front end portion of the vehicle, such as when the vehicle front end portion is hooked, and the vehicle front end portion is directed obliquely forward and downward and rearward and obliquely downward, the bending deformation of the side member 2 caused by such a load is generated. The strength against is increased.
Therefore, the vehicle front structure 1 of the present invention does not decrease the production efficiency, does not increase the vehicle weight, and is sufficient for a load that pulls the front end of the vehicle toward the front diagonally downward and the rear diagonally downward. The load applied to the vehicle from the front can be efficiently absorbed while securing the strength.

本発明の第１実施形態によれば、サイドメンバ２の中間部６における外側部材８及び内側部材９の下端部にそれぞれ形成されるフランジ８ａ，９ａが互いに重なって接合されており、内側部材９のフランジ９ａが横断面Ｌ字状に形成され、外側部材８及び内側部材９のフランジ８ａ，９ａが、マウントブラケット３に対して上下方向に重なって配置されている。そのため、サイドメンバ２の曲げ変形に対する強度が向上することとなる。従って、船積み等の際に車両前端部にフックが掛けられて、車両前端部に前方斜め下方及び後方斜め下方に向かう荷重が加えられた場合、このような荷重により発生するサイドメンバ２の曲げ変形に対する強度が、さらに高められることとなる。 According to the first embodiment of the present invention, the flanges 8 a and 9 a formed at the lower end portions of the outer member 8 and the inner member 9 in the intermediate portion 6 of the side member 2 are joined to each other so as to overlap each other. Of the outer member 8 and the flanges 8a and 9a of the inner member 9 are arranged so as to overlap the mount bracket 3 in the vertical direction. Therefore, the strength against bending deformation of the side member 2 is improved. Therefore, when a load is applied to the front end portion of the vehicle, such as when the vehicle front end portion is hooked, and the vehicle front end portion is directed obliquely forward and downward and rearward and obliquely downward, the bending deformation of the side member 2 caused by such a load is generated. The strength against is further increased.

本発明の第１実施形態によれば、サイドメンバ２の前部５、中間部６、及び後部７が結合された状態で、サイドメンバ２の外周が平滑となっているので、マウントブラケット３、エプロンサイドパネル等の取付部品を取付けるサイドメンバ２の取付面に、段差及び大きなうねり等の大きな形状変化がなくなる。そのため、これらの取付部品を容易かつ確実にサイドメンバ２に取付けることができ、生産効率を向上させることができる。また、取付部品とサイドメンバ２との間に意図しない隙間が生じることを防止でき、このような隙間によってサイドメンバ２周辺の車体剛性が変化することを防止できる。よって、前方からの荷重を確実かつ効率的に吸収でき、かつサイドメンバ２の曲げ変形に対する強度を確実に高めることができる。 According to the first embodiment of the present invention, since the outer periphery of the side member 2 is smooth with the front part 5, the intermediate part 6 and the rear part 7 of the side member 2 being joined, Large shape changes such as steps and large undulations are eliminated from the mounting surface of the side member 2 to which mounting parts such as an apron side panel are mounted. Therefore, these attachment parts can be easily and reliably attached to the side member 2, and the production efficiency can be improved. In addition, it is possible to prevent an unintended gap between the attachment component and the side member 2 and to prevent the rigidity of the vehicle body around the side member 2 from changing due to such a gap. Therefore, the load from the front can be absorbed reliably and efficiently, and the strength against bending deformation of the side member 2 can be reliably increased.

本発明の第１実施形態によれば、サイドメンバ２の前部５、中間部６、及び後部７における互いに隣接する部分が、テーラードブランク溶接により接合されているので、サイドメンバ２の外周を確実に平滑にすることができる。さらに、テーラードブランク溶接による結合部分では応力集中が発生し難いので、サイドメンバ２の中間部６周辺の剛性を低下させず、前方からの荷重を効率的に吸収でき、かつサイドメンバ２の曲げ変形に対する強度をさらに高めることができる。 According to the first embodiment of the present invention, the adjacent portions of the front portion 5, the intermediate portion 6 and the rear portion 7 of the side member 2 are joined by tailored blank welding, so that the outer periphery of the side member 2 can be reliably secured. Can be smoothed. Further, since stress concentration is unlikely to occur at the joint portion by tailored blank welding, the load from the front can be efficiently absorbed without reducing the rigidity around the intermediate portion 6 of the side member 2, and the bending deformation of the side member 2 is also achieved. The strength against can be further increased.

［第２実施形態］
本発明の第２実施形態に係る車両の前部構造を以下に説明する。第２実施形態に係る車両の前部構造の基本的な形態は、第１実施形態に係る車両の前部構造の形態と同様になっている。第１実施形態と同様な要素は、第１実施形態と同様の符号および名称を用いて説明する。ここでは、第１実施形態と異なる構成について説明する。 [Second Embodiment]
A vehicle front structure according to the second embodiment of the present invention will be described below. The basic form of the front structure of the vehicle according to the second embodiment is the same as the form of the front structure of the vehicle according to the first embodiment. Elements similar to those in the first embodiment will be described using the same symbols and names as those in the first embodiment. Here, a configuration different from the first embodiment will be described.

サイドメンバ２の前部５及び中間部６の結合部分と、サイドメンバ２の中間部６及び後部７の結合部分とについて説明する。図６に示すように、サイドメンバ２の中間部６後端には、サイドメンバ２の横断面中央に向かってオフセットする結合用フランジ６ａが形成されている。この結合用フランジ６ａが、サイドメンバ２の後部７前端の内周面と当接し、中間部６後端の結合用フランジ６ａと後部７前端とが、重なって、スポット溶接により互いに接合されている。また、特に図示はしないが、サイドメンバ２の中間部６前端にも同様に、サイドメンバ２の横断面中央に向かってオフセットする結合用フランジが形成されている。この結合用フランジは、サイドメンバ２の前部５後端の内周面と当接し、中間部６前端の結合用フランジと前部５後端とが、重なって、スポット溶接により互いに接合されている。 The joint part of the front part 5 and the intermediate part 6 of the side member 2 and the joint part of the intermediate part 6 and the rear part 7 of the side member 2 will be described. As shown in FIG. 6, a coupling flange 6 a that is offset toward the center of the cross section of the side member 2 is formed at the rear end of the intermediate portion 6 of the side member 2. The coupling flange 6a is in contact with the inner peripheral surface of the front end of the rear portion 7 of the side member 2, and the coupling flange 6a at the rear end of the intermediate portion 6 and the front end of the rear portion 7 are overlapped and joined to each other by spot welding. . Further, although not particularly illustrated, a coupling flange that is offset toward the center of the cross section of the side member 2 is also formed at the front end of the intermediate portion 6 of the side member 2. The coupling flange is in contact with the inner peripheral surface of the rear end of the front portion 5 of the side member 2, and the coupling flange of the front end of the intermediate portion 6 and the rear end of the front portion 5 are overlapped and joined to each other by spot welding. Yes.

以上のように本発明の第２実施形態によれば、第１実施形態と同様の効果が得られるとともに、サイドメンバ２の中間部６前端及び後端にサイドメンバ２の横断面中央に向かってオフセットする結合用フランジ６ａが形成され、結合用フランジ６ａが隣接するサイドメンバ２の前部５及び後部７とそれぞれ重なって接合されるので、剛性の高い中間部６によって前部５及び後部７が支持されることとなる。そのため、サイドメンバ２の折れ変形が減少して、サイドメンバ２が確実に前後方向に潰れるように変形することとなる。その結果、前方からの荷重を効率的に吸収できる。また、剛性の高い中間部６によって前部５及び後部７が支持されることによって、サイドメンバ２の曲げ変形に対する強度をさらに高めることができる。 As described above, according to the second embodiment of the present invention, the same effects as those of the first embodiment can be obtained, and at the front and rear ends of the intermediate portion 6 of the side member 2 toward the center of the cross section of the side member 2. Since the coupling flange 6a to be offset is formed and the coupling flange 6a is overlapped and joined to the front part 5 and the rear part 7 of the adjacent side member 2, the front part 5 and the rear part 7 are joined by the intermediate part 6 having high rigidity. Will be supported. Therefore, the bending deformation of the side member 2 is reduced, and the side member 2 is deformed so as to be surely crushed in the front-rear direction. As a result, the load from the front can be absorbed efficiently. Further, the front part 5 and the rear part 7 are supported by the intermediate part 6 having high rigidity, so that the strength against bending deformation of the side member 2 can be further increased.

ここまで本発明の第１実施形態及び第２実施形態について述べたが、本発明は既述の実施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および変更が可能である。 The first embodiment and the second embodiment of the present invention have been described so far, but the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention. Is possible.

例えば、本発明の第１変形例として、第１実施形態及び第２実施形態にて、マウントブラケット３が、サイドメンバ２の前部５と中間部６とに跨って取付けられていてもよい。このとき、マウントブラケット３の前側取付部３ｂはサイドメンバ２の前部５の上側部分に位置し、マウントブラケット３の後側取付部３ｃはサイドメンバ２の後部７の上側部分に位置している。第１実施形態及び第２実施形態と同様の効果が得られる。 For example, as a first modification of the present invention, the mount bracket 3 may be attached across the front portion 5 and the intermediate portion 6 of the side member 2 in the first embodiment and the second embodiment. At this time, the front mounting portion 3b of the mounting bracket 3 is positioned on the upper portion of the front portion 5 of the side member 2, and the rear mounting portion 3c of the mounting bracket 3 is positioned on the upper portion of the rear portion 7 of the side member 2. . The same effects as those in the first embodiment and the second embodiment can be obtained.

本発明の第２変形例として、第１実施形態及び第２実施形態にて、サイドメンバ２の中間部６の剛性をサイドメンバ２の前部５及び後部７の剛性より高くするために、中間部６に、前部５及び後部７の材料よりも高い剛性を有する材料が用いられてもよい。例えば、中間部６に高張力材料が用いられてもよい。この場合、第１実施形態では、テーラードブランク溶接以外の溶接によって、前部５、中間部６及び後部７のそれぞれの接合が行なわれてもよい。第１実施形態及び第２実施形態と同様の効果が得られる。 As a second modification of the present invention, in the first embodiment and the second embodiment, in order to make the rigidity of the intermediate portion 6 of the side member 2 higher than the rigidity of the front portion 5 and the rear portion 7 of the side member 2, A material having higher rigidity than the material of the front part 5 and the rear part 7 may be used for the part 6. For example, a high tensile material may be used for the intermediate portion 6. In this case, in 1st Embodiment, each joining of the front part 5, the intermediate part 6, and the rear part 7 may be performed by welding other than tailored blank welding. The same effects as those in the first embodiment and the second embodiment can be obtained.

本発明の第３変形例として、第１実施形態及び第２実施形態にて、サイドメンバ２の中間部６の剛性をサイドメンバ２の前部５及び後部７の剛性より高くするために、中間部６に、絞り構造等の補強構造が採用されてもよい。第１実施形態及び第２実施形態と同様の効果が得られる。 As a third modification of the present invention, in the first embodiment and the second embodiment, in order to make the rigidity of the intermediate part 6 of the side member 2 higher than the rigidity of the front part 5 and the rear part 7 of the side member 2, A reinforcing structure such as a throttle structure may be employed for the portion 6. The same effects as those in the first embodiment and the second embodiment can be obtained.

本発明の第４変形例として、第１実施形態及び第２実施形態にて、サイドメンバ２の中間部６における外側部材８のフランジ８ａが、横断面略Ｌ字状に形成され、内側部材９のフランジ９ａが略直線状に形成されていてもよい。第１実施形態及び第２実施形態と同様の効果が得られる。 As a fourth modification of the present invention, in the first embodiment and the second embodiment, the flange 8a of the outer member 8 in the intermediate portion 6 of the side member 2 is formed in a substantially L-shaped cross section, and the inner member 9 The flange 9a may be formed in a substantially linear shape. The same effects as those in the first embodiment and the second embodiment can be obtained.

本発明の第５変形例として、第１実施形態にて、サイドメンバ２の前部５及び中間部６の結合部分と、サイドメンバ２の中間部６及び後部７の結合部分とのいずれか一方のみが、テーラードブランク溶接により接合されていてもよい。 As a fifth modification of the present invention, in the first embodiment, one of the coupling portion of the front portion 5 and the intermediate portion 6 of the side member 2 and the coupling portion of the intermediate portion 6 and the rear portion 7 of the side member 2 is used. Only may be joined by tailored blank welding.

本発明の第６変形例として、第２実施形態にて、サイドメンバ２の前部５後端にサイドメンバ２の横断面中心に向かってオフセットした結合用フランジが設けられて、この結合用フランジと中間部６前端とが重ねて接合されていてもよい。サイドメンバ２の後部７前端にサイドメンバ２の横断面中心に向かってオフセットした結合用フランジが設けられて、この結合用フランジと中間部６後端とが重ねて接合されていてもよい。
また、前部５後端に結合用フランジを設けた構成と、中間部６後端に結合用フランジ６ａを設けた構成とを組み合わせてもよい。中間部６前端に結合用フランジを設けた構成と、後部７前端に結合用フランジを設けた構成とを組み合わせてもよい。前部５後端に結合用フランジを設けた構成と、後部７前端に結合用フランジを設けた構成とを組み合わせてもよい。 As a sixth modification of the present invention, in the second embodiment, a coupling flange that is offset toward the center of the cross section of the side member 2 is provided at the rear end of the front portion 5 of the side member 2, and this coupling flange is provided. And the intermediate part 6 front end may overlap and be joined. A coupling flange offset toward the center of the cross section of the side member 2 may be provided at the front end of the rear portion 7 of the side member 2, and the coupling flange and the rear end of the intermediate portion 6 may be joined together.
Moreover, you may combine the structure which provided the coupling flange in the front part 5 rear end, and the structure which provided the coupling flange 6a in the intermediate part 6 rear end. You may combine the structure which provided the coupling flange in the intermediate part 6 front end, and the structure which provided the coupling flange in the rear part 7 front end. You may combine the structure which provided the coupling flange in the front part 5 rear end, and the structure which provided the coupling flange in the rear part 7 front end.

本発明の第７変形例として、第１実施形態及び第２実施形態に係るサイドメンバ２及びマウントブラケット３が、車幅方向左右のいずれか一方にのみ設けられていてもよい。 As a seventh modification of the present invention, the side member 2 and the mount bracket 3 according to the first embodiment and the second embodiment may be provided only on either the left or right side in the vehicle width direction.

本発明の第８変形例として、第１実施形態及び第２実施形態にて、スポット溶接の代わりに、ガス溶接、アーク溶接、ティグ溶接、プラズマ溶接、セルフシールドアーク溶接、エレクトロスラグ溶接、電子ビーム溶接、レーザービーム溶接、プロジェクション溶接、シーム溶接、アプセット溶接、フラッシュ溶接、バットシーム溶接、ろう接、ろう付け等が用いられてもよい。また、スポット溶接の代わりに、ネジ、ボルト等の締結部材が用いられてもよい。第１実施形態及び第２実施形態と同様の効果が得られる。 As an eighth modification of the present invention, in the first and second embodiments, instead of spot welding, gas welding, arc welding, TIG welding, plasma welding, self-shielded arc welding, electroslag welding, electron beam Welding, laser beam welding, projection welding, seam welding, upset welding, flash welding, butt seam welding, brazing, brazing, and the like may be used. Further, instead of spot welding, fastening members such as screws and bolts may be used. The same effects as those in the first embodiment and the second embodiment can be obtained.

１車両の前部構造
２エプロンサイドメンバ（サイドメンバ）
３エンジンマウントブラケット（マウントブラケット）
５前部
６中間部
６ａ結合用フランジ
７後部
８外側部材
８ａフランジ
９内側部材
９ａフランジ 1 Vehicle front structure 2 Apron side member (side member)
3 Engine mount bracket (mount bracket)
5 Front part 6 Middle part 6a Connecting flange 7 Rear part 8 Outer member 8a Flange 9 Inner member 9a Flange

Claims

Apron side members arranged along the vehicle longitudinal direction and provided in a pair of left and right in the vehicle width direction,
To suspend the engine in between the pair of apron side members, Bei example an engine mount bracket which is mounted on top of the apron side member,
The apron side member is divided into a front part, an intermediate part, and a rear part in the vehicle longitudinal direction, and the adjacent parts of the front part, the intermediate part, and the rear part are combined,
An intermediate portion of the apron side member has an outer member disposed on the outer side in the vehicle width direction, and an inner member disposed on the inner side in the vehicle width direction,
The flanges formed respectively on the lower part of the outer member and the inner member are joined to overlap each other,
Either one of the flanges of the outer member and the inner member is formed in a L-shaped cross section,
In the front structure of the vehicle , wherein the flanges of the outer member and the inner member are arranged so as to overlap in the vertical direction with respect to the engine mount bracket ,
The cross section of the outer member in the middle part of the apron side member is formed in a substantially arc shape that curves inward in the vehicle width direction,
The thickness of the plate material used for the intermediate portion of the apron side member is made thicker than the thickness of the plate material used for the front and rear portions of the apron side member, and the rigidity of the material used for the intermediate portion is used for the front and rear portions. be higher than the rigidity of the material, and by at least one providing a diaphragm structure to the intermediate portion, rigidity of the intermediate portion is set higher than the front and rear of the rigid,
A front structure of a vehicle, wherein the engine mount bracket is attached across a front portion and an intermediate portion of the apron side member.

2. The vehicle front structure according to claim 1, wherein an outer periphery of the apron side member is smooth in a state in which a front portion, an intermediate portion, and a rear portion of the apron side member are coupled.

The vehicle front structure according to claim 2, wherein at least one of the apron side member adjacent to each other at the front, middle, and rear thereof is joined by tailored blank welding.

At least one of the front end and the rear end of the apron side member or at least one of the front rear end of the apron side member and the rear front end of the apron side member is offset toward the center of the cross section of the apron side member. A connecting flange is formed,
The vehicle front structure according to claim 2, wherein the coupling flange overlaps and is joined to a front part, an intermediate part, or a rear part of the adjacent apron side members.