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JP7255164B2 - vehicle side structure - Google Patents

vehicle side structure Download PDF

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Publication number
JP7255164B2
JP7255164B2 JP2018237073A JP2018237073A JP7255164B2 JP 7255164 B2 JP7255164 B2 JP 7255164B2 JP 2018237073 A JP2018237073 A JP 2018237073A JP 2018237073 A JP2018237073 A JP 2018237073A JP 7255164 B2 JP7255164 B2 JP 7255164B2
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Prior art keywords
vehicle
width direction
joined
sill
floor
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Japanese (ja)
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JP2020097350A (en
Inventor
直紀 小塩
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Suzuki Motor Corp
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Suzuki Motor Corp
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Priority to JP2018237073A priority Critical patent/JP7255164B2/en
Priority to CN201921614571.9U priority patent/CN210734286U/en
Priority to FR1913343A priority patent/FR3090505B1/en
Priority to DE102019134007.1A priority patent/DE102019134007B4/en
Publication of JP2020097350A publication Critical patent/JP2020097350A/en
Priority to JP2022183237A priority patent/JP7444225B2/en
Priority to JP2022183238A priority patent/JP7445223B2/en
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Publication of JP7255164B2 publication Critical patent/JP7255164B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/157—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body for side impacts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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
    • B62D25/025—Side sills thereof
    • 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
    • B62D25/2036—Floors or bottom sub-units in connection with other superstructure subunits the subunits being side panels, sills or pillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D27/00—Connections between superstructure or understructure sub-units
    • B62D27/02—Connections between superstructure or understructure sub-units rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
    • 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

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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)

Description

本発明は、車両側部構造に関する。 The present invention relates to a vehicle side structure.

電気自動車や普通自動車等の車両では、電池パックや燃料タンクなどの車載部材が搭載されており、該車載部材は、レイアウトの都合上、車体フロアの下方などの車両下部に設けられている。そのため、電気自動車等の車両においては、特に車両側突時の衝撃荷重に対する車載部材の破損を避ける措置を施す必要がある。
そこで、従来の車両の中には、車両幅方向外側のサイドシルの内部に衝撃吸収部材を追加して設け、当該サイドシルの車両内側の位置でフロアパネルに接合されるサイドメンバを設けるとともに、当該フロアパネルにカラー及びブラケットを介して接合される電池フレーム（クロスメンバ）を設けることにより、側突時に、電池パック等を支持する電池フレームのフロアパネルからの離脱を防止する構造が取られているものがある（例えば、特許文献１参照）。 2. Description of the Related Art Vehicles such as electric vehicles and ordinary vehicles are equipped with on-vehicle members such as battery packs and fuel tanks. Therefore, in a vehicle such as an electric vehicle, it is necessary to take measures to avoid damage to vehicle-mounted members due to an impact load, particularly in the event of a vehicle side collision.
Therefore, in some conventional vehicles, a shock absorbing member is additionally provided inside the side sill on the vehicle width direction outer side, and a side member is provided that is joined to the floor panel at a position on the vehicle inner side of the side sill. By providing a battery frame (cross member) that is joined to the panel via a collar and bracket, it is structured to prevent the battery frame that supports the battery pack, etc. from coming off the floor panel in the event of a side collision. There is (for example, see Patent Document 1).

特開２０１３－６０１６０号公報JP 2013-60160 A

しかしながら、上述した従来の車両側部構造は、サイドシルの車両内側に位置するフロアパネルにサイドメンバ及びブラケットが接合されていることにより、サイドシルの車両内側に高剛性部が存在することになるので、車両幅方向の荷重に対して高剛性部を軸としてサイドシルが車両上下方向にずれるように変位し、荷重伝達が不十分となってサイドシルの車両内側への侵入量を増加させるおそれがあった。 However, in the above-described conventional vehicle side structure, the side member and the bracket are joined to the floor panel located on the vehicle inner side of the side sill, so that a highly rigid portion exists on the vehicle inner side of the side sill. There is a risk that the side sill will be displaced in the vertical direction of the vehicle about the high-rigidity portion against the load in the width direction of the vehicle, resulting in insufficient load transmission and increasing the amount of penetration of the side sill into the inside of the vehicle.

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、側突時に加わる車両幅方向の荷重によるサイドシルの車両上下方向のずれを抑制し、サイドメンバ及びフロア上のクロスメンバに車両幅方向の荷重を効率良く伝達させ、サイドシルによる車両幅方向の荷重吸収性能を向上させ、サイドシルの車両内側への侵入量を抑制することが可能な車両側部構造を提供することにある。 SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to suppress the displacement of the side sill in the vertical direction of the vehicle due to the load applied in the vehicle width direction in the event of a side collision, thereby providing a side member and a cross member on the floor. To provide a vehicle side structure capable of efficiently transmitting a load in the vehicle width direction to a side sill, improving the load absorption performance of the side sill in the vehicle width direction, and suppressing the intrusion amount of the side sill into the inside of the vehicle. .

上記従来技術の有する課題を解決するために、本発明は、フロアパネルの下面の車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドメンバと、該サイドメンバの車両幅方向外側に設けられ、車両前後方向に延びる左右一対のサイドシルと、前記フロアパネルの上面に設けられ、車両幅方向に延びて前記左右一対のサイドシルを連結するフロア上のクロスメンバとを備え、前記サイドシルは、車両内側のサイドシルインナパネル及び車両外側のサイドシルアウタパネルで構成され、前記サイドシルの内部には衝撃吸収部材が設けられ、前記フロアパネルの車両外側端部は、前記サイドシルに接合されるサイドシル側接合部を有している車両側部構造において、前記サイドメンバと前記サイドシルとは、車両幅方向で隣接して配置され、前記サイドメンバは、前記サイドシルと少なくとも一部が車両側方視で重なる位置に配置され、前記サイドメンバは、前記サイドシルに接合される第１接合部を有し、該第１接合部は、車両側方視で前記衝撃吸収部材の車両内側上部と重なる位置に配置され、前記サイドメンバは、内側壁と外側壁を有し、前記サイドメンバの内部には、前記内側壁と前記外側壁に接合されるリンフォースメントが設けられ、該リンフォースメントの上側には、前記フロアパネルと組み合わされることにより構成される上側閉断面部が設けられ、該上側閉断面部は、車両側方視で前記衝撃吸収部材と重なる位置に配置されている。 In order to solve the above-described problems of the prior art, the present invention provides a pair of left and right side members extending in the vehicle front-rear direction, which are provided on the vehicle width direction side portions of the lower surface of the floor panel, and the vehicle width direction outer sides of the side members. a pair of left and right side sills extending in the longitudinal direction of the vehicle; and a cross member on the floor extending in the width direction of the vehicle and connecting the pair of left and right side sills. , a side sill inner panel on the inner side of the vehicle and a side sill outer panel on the outer side of the vehicle. A shock absorbing member is provided inside the side sill. In the vehicle side structure having a The side member has a first joint portion that is joined to the side sill, and the first joint portion is arranged at a position overlapping an upper portion of the impact absorbing member on the inner side of the vehicle when viewed from the side of the vehicle . The side member has an inner wall and an outer wall, a reinforcement joined to the inner wall and the outer wall is provided inside the side member, and the floor is mounted on the upper side of the reinforcement. An upper closed cross section formed by being combined with the panel is provided, and the upper closed cross section is arranged at a position overlapping the impact absorbing member when viewed from the side of the vehicle.

上述の如く、本発明に係る車両側部構造は、フロアパネルの下面の車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドメンバと、該サイドメンバの車両幅方向外側に設けられ、車両前後方向に延びる左右一対のサイドシルと、前記フロアパネルの上面に設けられ、車両幅方向に延びて前記左右一対のサイドシルを連結するフロア上のクロスメンバとを備え、前記サイドシルは、車両内側のサイドシルインナパネル及び車両外側のサイドシルアウタパネルで構成され、前記サイドシルの内部には衝撃吸収部材が設けられ、前記フロアパネルの車両外側端部は、前記サイドシルに接合されるサイドシル側接合部を有しており、前記サイドメンバと前記サイドシルとは、車両幅方向で隣接して配置され、前記サイドメンバは、前記サイドシルと少なくとも一部が車両側方視で重なる位置に配置され、前記サイドメンバは、前記サイドシルに接合される第１接合部を有し、該第１接合部は、車両側方視で前記衝撃吸収部材の車両内側上部と重なる位置に配置されている。
したがって、本発明の車両側部構造においては、サイドメンバとサイドシルとが隣り合った状態で接合されることにより、サイドシルがサイドメンバに支持される構造となるので、サイドシルによる車両幅方向からの荷重吸収性能を向上させることができる。また、本発明の車両側部構造においては、サイドメンバの第１接合部がフロアパネルよりも車両上下方向で上側に位置することになるので、車両幅方向からの荷重伝達時にサイドシルがサイドメンバに対して車両上下方向にずれながら車両内側に侵入することを抑制できる。 As described above, the vehicle side structure according to the present invention includes a pair of left and right side members that are provided on the vehicle width direction sides of the lower surface of the floor panel and extend in the vehicle front-rear direction, and the side members are provided outside the vehicle width direction of the side members. a pair of left and right side sills extending in the longitudinal direction of the vehicle; and a cross member on the floor provided on the upper surface of the floor panel and extending in the width direction of the vehicle to connect the pair of left and right side sills, the side sills comprising the pair of left and right side sills. It is composed of an inner side sill inner panel and a vehicle outer side sill outer panel, a shock absorbing member is provided inside the side sill, and the vehicle outer end of the floor panel has a side sill side joint portion that is joined to the side sill. The side member and the side sill are arranged adjacent to each other in the vehicle width direction, the side member is arranged at a position at least partially overlapping the side sill when viewed from the side of the vehicle, and the side member is and a first joint portion joined to the side sill, and the first joint portion is arranged at a position overlapping an upper portion of the impact absorbing member on the inner side of the vehicle when viewed from the side of the vehicle.
Therefore, in the vehicle side structure of the present invention, the side sill is supported by the side member by connecting the side member and the side sill in a state where they are adjacent to each other. Absorption performance can be improved. Further, in the vehicle side portion structure of the present invention, the first joint portion of the side member is positioned above the floor panel in the vertical direction of the vehicle. On the other hand, it is possible to suppress intrusion into the inside of the vehicle while shifting in the vertical direction of the vehicle.

本発明の実施形態に係る車両側部構造において、フロアパネル、サイドシル及びフロア上の上側クロスメンバを車両上方から見た斜視図である。1 is a perspective view of a floor panel, a side sill, and an upper cross member on a floor in a vehicle side structure according to an embodiment of the present invention, viewed from above the vehicle; FIG. 図１におけるＡ－Ａ線断面図である。FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1; 図１におけるサイドシル及びフロア上の上側クロスメンバとその周辺部を車両上方から見た断面斜視図である。FIG. 2 is a cross-sectional perspective view of the upper cross member on the side sill and floor in FIG. 図１におけるフロアパネルを車両下方から見た斜視図である。FIG. 2 is a perspective view of the floor panel in FIG. 1 as seen from below 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。
なお、図において、矢印Ｆｒ方向は車両前方を示し、矢印Ｏ方向は車両幅方向外側を示している。また、矢印Ｘ方向は車両幅方向を示し、矢印Ｙ方向は車両前後方向を示している。 BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the illustrated embodiments.
In the drawings, the direction of arrow Fr indicates the front of the vehicle, and the direction of arrow O indicates the outside in the width direction of the vehicle. The arrow X direction indicates the vehicle width direction, and the arrow Y direction indicates the vehicle front-rear direction.

図１～図４は本発明の実施形態に係る車両側部構造を示すものである。本実施形態の車両側部構造は、図１～図４に示すように、車両幅方向及び車両前後方向に展開するフロアパネル１の下面の車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドメンバ２と、これらサイドメンバ２の車両幅方向外側に設けられ、車両前後方向に延びる左右一対のサイドシル３と、フロアパネル１の上面に設けられ、車両幅方向に延びて左右一対のサイドシル３を連結するフロア上の上側クロスメンバ４とを備えている。
また、本実施形態のサイドシル３は、図２及び図３に示すように、車両内側のサイドシルインナパネル３１及び車両外側のサイドシルアウタパネル３２で閉断面構造に構成されており、当該サイドシルインナパネル３１及びサイドシルアウタパネル３２は、開口部が互いに向き合って配置され、上下端部３１ａ，３１ｂ，３２ａ，３２ｂが車両幅方向でほぼ同じ位置において接合される断面ハット型形状を有している。そして、サイドシル３の内部には、サイドシルアウタパネル３２などに加わる車両幅方向の荷重を吸収する衝撃吸収部材５が設けられている。しかも、フロアパネル１の車両外側端部１ａは、サイドシル３のサイドシルインナパネル３１に接合されるサイドシル側接合部１０を有している。なお、フロアパネル１の車両外側端部１ａとサイドシルインナパネル３１とは接合されるようになっているため、フロア上の上側クロスメンバ４との接合部では、フロアパネル１が切り欠かれている。 1 to 4 show a vehicle side structure according to an embodiment of the invention. As shown in FIGS. 1 to 4, the vehicle side structure of the present embodiment is provided on the vehicle width direction side portion of the lower surface of the floor panel 1 that extends in the vehicle width direction and the vehicle front-rear direction, and extends in the vehicle front-rear direction. a pair of left and right side members 2; a pair of left and right side sills 3 provided outside the side members 2 in the vehicle width direction and extending in the vehicle front-rear direction; and an upper cross member 4 on the floor that connects the side sills 3 of the floor.
As shown in FIGS. 2 and 3, the side sill 3 of the present embodiment has a closed cross-sectional structure composed of a side sill inner panel 31 on the inner side of the vehicle and an outer side sill panel 32 on the outer side of the vehicle. The side sill outer panel 32 has openings facing each other, and has a hat-shaped cross section in which upper and lower ends 31a, 31b, 32a, 32b are joined at approximately the same position in the vehicle width direction. Inside the side sill 3, a shock absorbing member 5 is provided for absorbing a load in the vehicle width direction applied to the side sill outer panel 32 and the like. Moreover, the vehicle outer side end portion 1 a of the floor panel 1 has a side sill-side joint portion 10 that is joined to the side sill inner panel 31 of the side sill 3 . Since the vehicle outer side end portion 1a of the floor panel 1 and the side sill inner panel 31 are joined together, the floor panel 1 is notched at the joint portion with the upper cross member 4 on the floor. .

本実施形態の車両側部構造においては、図２及び図３に示すように、サイドメンバ２とサイドシル３とが車両幅方向で隣接して配置されており、サイドメンバ２は、サイドシル３と少なくとも一部が車両側方視で重なる位置に配置されている。本実施形態の車両側部構造におけるサイドメンバ２は、車両上下方向でサイドシル３の高さ位置よりも低い位置に設けられている。また、サイドメンバ２は、サイドシル３のサイドシルインナパネル３１の側面に接合される第１接合部Ｗ１を有しており、該第１接合部Ｗ１は、車両側方視で衝撃吸収部材５の車両内側上部と重なる位置に配置されている。すなわち、サイドメンバ２とサイドシル３とは、隣り合った状態で第１接合部Ｗ１を介して接合されている。ここで、第１接合部Ｗ１は、サイドメンバ２とサイドシル３とを接合するため、車両前後方向に沿って配置されている。
そのため、サイドシル３は、車両幅方向外側からの荷重に対して、サイドメンバ２に支持される構造となり、サイドシル３による車両幅方向外側からの荷重吸収性が高められるように構成されている。なお、第１接合部Ｗ１は、フロアパネル１の車両外側端部１ａよりも車両上方の位置に配置されていれば良い。 In the vehicle side structure of the present embodiment, as shown in FIGS. 2 and 3, the side member 2 and the side sill 3 are arranged adjacent to each other in the vehicle width direction, and the side member 2 and the side sill 3 are arranged at least. They are arranged at positions where some of them overlap when viewed from the side of the vehicle. The side member 2 in the vehicle side structure of the present embodiment is provided at a position lower than the height position of the side sill 3 in the vertical direction of the vehicle. Further, the side member 2 has a first joint portion W1 that is joined to the side surface of the side sill inner panel 31 of the side sill 3, and the first joint portion W1 corresponds to the impact absorbing member 5 as viewed from the side of the vehicle. It is placed in a position that overlaps with the inner upper part. That is, the side member 2 and the side sill 3 are joined via the first joint portion W1 while being adjacent to each other. Here, the first joint portion W1 is arranged along the vehicle front-rear direction in order to join the side member 2 and the side sill 3 together.
Therefore, the side sill 3 is structured to be supported by the side member 2 against the load from the outside in the vehicle width direction, and is configured so that the side sill 3 can absorb the load from the outside in the vehicle width direction. The first joint portion W1 may be arranged at a position above the vehicle outside end portion 1a of the floor panel 1. As shown in FIG.

本実施形態におけるフロア上の上側クロスメンバ４は、図１～図３に示すように、開口部を下向きに配置した断面ハット型形状に形成されており、車両前後方向に突出したフランジ部４０は、フロアパネル１の上面及びサイドシルインナパネル３１の側面に接合されている。また、フロア上の上側クロスメンバ４は、フロアパネル１の中央面１１に沿って延びる車両内側の本体部４１と、車両幅方向で車両内側から車両外側にかけて車両下方へ傾斜して延びる傾斜部４２を備えている。傾斜部４２は、水平方向に延びる車両幅方向外側端部４２ａでサイドシル３のサイドシルインナパネル３１に接合される第２接合部Ｗ２を有しており、該第２接合部Ｗ２は、サイドシルインナパネル３１の上面３１ｃに位置している。
これによって、第２接合部Ｗ２が車両上側からサイドシルインナパネル３１に接合され、第１接合部Ｗ１が車両幅方向内側からサイドシルインナパネル３１に接合されて接合部が交差して位置することになるため、車両幅方向外側からの衝撃荷重によるサイドシル３の移動が抑制される構造になっている。なお、フロア上の上側クロスメンバ４の上部には、シートブラケット４３が取付けられている。 As shown in FIGS. 1 to 3, the upper cross member 4 on the floor in this embodiment is formed in a hat-shaped cross section with an opening facing downward, and a flange portion 40 protruding in the vehicle front-rear direction is , the upper surface of the floor panel 1 and the side surface of the side sill inner panel 31 . The upper cross member 4 on the floor includes a main body portion 41 extending along the central surface 11 of the floor panel 1 on the inside of the vehicle, and an inclined portion 42 extending downward from the inside to the outside of the vehicle in the vehicle width direction. It has The inclined portion 42 has a second joint portion W2 joined to the side sill inner panel 31 of the side sill 3 at the vehicle width direction outer end portion 42a extending in the horizontal direction. 31 is located on the upper surface 31c.
As a result, the second joint portion W2 is joined to the side sill inner panel 31 from the upper side of the vehicle, and the first joint portion W1 is joined to the side sill inner panel 31 from the inner side in the vehicle width direction so that the joint portions intersect each other. Therefore, the structure is such that the movement of the side sill 3 due to the impact load from the outside in the vehicle width direction is suppressed. A seat bracket 43 is attached to the upper portion of the upper cross member 4 on the floor.

本実施形態のサイドメンバ２は、図２及び図３に示すように、平面状の下面２ａと、該下面２ａの車両幅方向の内側及び外側に位置し、車両上方へ向かって延びる内外両側壁２ｂ，２ｃとを有する断面略Ｕ字状に形成されている。サイドメンバ２の内部には、サイドメンバ２の内側壁２ｂと外側壁２ｃに接合され、これら内外両側壁２ｂ，２ｃを連結するリンフォースメント２１が設けられている。また、このリンフォースメント２１の上側には、フロアパネル１と組み合わされることにより構成される上側閉断面部Ｓ１が設けられており、該上側閉断面部Ｓ１は、車両側方視でサイドシル３内の衝撃吸収部材５と重なる位置に配置されている。この配置により、上側閉断面部Ｓ１が車両幅方向外側からの荷重に対して衝撃吸収部材５を支持することになり、荷重吸収性能が促進される構造になっている。 As shown in FIGS. 2 and 3, the side member 2 of the present embodiment has a planar lower surface 2a and inner and outer side walls positioned on the inner and outer sides of the lower surface 2a in the vehicle width direction and extending upwardly of the vehicle. 2b and 2c, and has a substantially U-shaped cross section. Inside the side member 2, a reinforcement 21 is provided which is joined to the inner wall 2b and the outer wall 2c of the side member 2 to connect the inner and outer walls 2b and 2c. Further, an upper closed cross-section portion S1 configured by combining with the floor panel 1 is provided on the upper side of the reinforcement 21, and the upper closed cross-section portion S1 is located inside the side sill 3 when viewed from the side of the vehicle. is arranged at a position overlapping with the impact absorbing member 5 of . With this arrangement, the upper closed cross-sectional portion S1 supports the impact absorbing member 5 against the load from the outside in the vehicle width direction, and the structure is such that the load absorbing performance is promoted.

一方、本実施形態の車両側部構造において、左右一対のサイドメンバ２の下側には、図２及び図３に示すように、車両幅方向に延び、これら左右一対のサイドメンバ２を連結するフロア下の下側クロスメンバ６が設けられており、該フロア下の下側クロスメンバ６は、サイドメンバ２内のリンフォースメント２１に接合される円筒形の固定部材７によってサイドメンバ２に固定されている。すなわち、サイドメンバ２は、リンフォースメント２１及び固定部材７を介してフロア下の下側クロスメンバ６に支持されるようになっている。
そのため、フロア下の下側クロスメンバ６は、後述の車載部材が固定部Ｄで固定される閉断面構造の本体部６１と、サイドメンバ２に固定されるフランジ部６２を有している。本体部６１は、下側クロスメンバ６の車両幅方向の中間部分に位置しており、上下に間隔を空けて配置される上下一対のメンバ体６１ａ，６１ｂを有している。フランジ部６２は、下側クロスメンバ６の車両幅方向の外側端部に位置しており、車両後方視で本体部６１の車両幅方向外側の開口端を塞ぐように、上下一対のメンバ体６１ａ，６１ｂに接合されている。
また、固定部材７の内周面には、サイドメンバ２と下側クロスメンバ６とを締結する締結ボルト７１の軸部の雄ねじと螺合する雌ねじが形成されている。固定部材７の上部７ａは、取付孔２１ｄを介して取付面２１ａの上方に突出され、中間部７ｃが取付面２１ａの下面に当接した状態でリンフォースメント２１に接合されている。固定部材７の下部７ｂは、サイドメンバ２の下面２ａの上に接合されている。
さらに、リンフォースメント２１は、サイドメンバ２の下面２ａの上方に位置し、該下面２ａに対して間隔を空けて配置される取付面２１ａと、サイドメンバ２の左右両側壁２ｂ，２ｃに接合される側面２１ｂ，２１ｃとを有しており、取付面２１ａには、固定部材７の上部を挿入する取付孔２１ｄが設けられている。なお、サイドメンバ２の下面２ａと、下側クロスメンバ６の本体部６１及びフランジ部６２には、後述するブラケット部材８の貫通孔８５及びリンフォースメント２１の取付孔２１ｄと対応して、締結ボルト７１の軸部を挿通させる挿通孔２ｄ，６１ｃ，６２ａが設けられている。
これにより、サイドメンバ２内のリンフォースメント２１に外部荷重が入力された場合、当該外部荷重は、固定部材７からフロア下の下側クロスメンバ６に伝達されることになり、荷重の伝達及び分散が促進されるような構造になっている。 On the other hand, in the vehicle side portion structure of the present embodiment, as shown in FIGS. 2 and 3, below the pair of left and right side members 2, there extends in the vehicle width direction and connects the pair of left and right side members 2. An underfloor lower cross member 6 is provided, and the underfloor lower cross member 6 is fixed to the side member 2 by a cylindrical fixing member 7 joined to a reinforcement 21 in the side member 2. It is That is, the side member 2 is supported by the lower cross member 6 below the floor via the reinforcement 21 and the fixing member 7 .
Therefore, the lower cross member 6 under the floor has a main body portion 61 with a closed cross section structure to which a vehicle-mounted member (to be described later) is fixed at a fixing portion D, and a flange portion 62 fixed to the side member 2 . The body portion 61 is positioned in the middle portion of the lower cross member 6 in the vehicle width direction, and has a pair of upper and lower member bodies 61a and 61b that are vertically spaced apart. The flange portion 62 is positioned at the outer end portion of the lower cross member 6 in the vehicle width direction, and is a pair of upper and lower member bodies 61a so as to close the opening end of the main body portion 61 on the outer side in the vehicle width direction when viewed from the rear of the vehicle. , 61b.
In addition, the inner peripheral surface of the fixing member 7 is formed with a female thread that engages with the male thread of the shaft portion of the fastening bolt 71 that fastens the side member 2 and the lower cross member 6 . An upper portion 7a of the fixing member 7 protrudes above the mounting surface 21a through the mounting hole 21d, and is joined to the reinforcement 21 with the intermediate portion 7c in contact with the lower surface of the mounting surface 21a. A lower portion 7 b of the fixing member 7 is joined onto the lower surface 2 a of the side member 2 .
Further, the reinforcement 21 is positioned above the lower surface 2a of the side member 2 and joined to the mounting surface 21a spaced from the lower surface 2a and the left and right side walls 2b and 2c of the side member 2. The mounting surface 21a is provided with a mounting hole 21d into which the upper portion of the fixing member 7 is inserted. The lower surface 2a of the side member 2 and the main body portion 61 and the flange portion 62 of the lower cross member 6 are provided with fasteners corresponding to the through holes 85 of the bracket member 8 and mounting holes 21d of the reinforcement 21, which will be described later. Insertion holes 2d, 61c, and 62a through which the shaft portions of the bolts 71 are inserted are provided.
As a result, when an external load is input to the reinforcement 21 in the side member 2, the external load is transmitted from the fixed member 7 to the lower cross member 6 under the floor. The structure is such that dispersion is facilitated.

また、本実施形態の車両側部構造において、サイドメンバ２と下側クロスメンバ６のフランジ部６２とは、図２及び図３に示すように、ブラケット部材８を介して固定されており、これらブラケット部材８と下側クロスメンバ６とが組み合わされることにより、ブラケット部材８の固定部周りの剛性を高める下側閉断面部Ｓ２が形成されている。この下側閉断面部Ｓ２は、車両幅方向で下側クロスメンバ６の本体部６１とフランジ部６２との境界領域Ｒを跨ぐ位置に配置されており、この配置によってサイドメンバ２と下側クロスメンバ６との固定部の応力集中箇所の位置がずらせるようになっている。しかも、ブラケット部材８は、車両幅方向内側の位置で下側クロスメンバ６の本体部６１に固定されるクロスメンバ側固定部８１を有している。
本実施形態のブラケット部材８は、車両上面視で四角形形状に形成され、サイドメンバ２の下面２ａに固定されるサイドメンバ側固定部８２と、該サイドメンバ側固定部８２の車両幅方向内側端部からクロスメンバ側固定部８１まで延び、車両幅方向内側へ向かって下方に傾斜する傾斜面８３を有している。なお、サイドメンバ側固定部６２には、締結ボルト７１の軸部を挿通させる貫通孔８５が設けられている。
これによって、サイドメンバ２からの荷重がブラケット部材８のサイドメンバ側固定部８２及び傾斜面８３を介して下側クロスメンバ６に円滑に伝達され、局所的な荷重集中が抑制されるようになっている。 In addition, in the vehicle side portion structure of this embodiment, the side member 2 and the flange portion 62 of the lower cross member 6 are fixed via the bracket member 8 as shown in FIGS. The combination of the bracket member 8 and the lower cross member 6 forms a lower closed cross-sectional portion S2 that enhances the rigidity around the fixing portion of the bracket member 8. As shown in FIG. The lower closed cross-sectional portion S2 is arranged at a position straddling the boundary region R between the body portion 61 and the flange portion 62 of the lower cross member 6 in the vehicle width direction. The position of the stress-concentrating portion of the portion fixed to the member 6 is deviated. Moreover, the bracket member 8 has a cross member side fixing portion 81 that is fixed to the main body portion 61 of the lower cross member 6 at a position on the inner side in the vehicle width direction.
The bracket member 8 of the present embodiment is formed in a rectangular shape when viewed from the top of the vehicle, and includes a side member side fixing portion 82 fixed to the lower surface 2a of the side member 2, and a vehicle width direction inner end of the side member side fixing portion 82. , to the cross member side fixing portion 81 and has an inclined surface 83 that is inclined downward toward the vehicle width direction inner side. The side member fixing portion 62 is provided with a through hole 85 through which the shaft portion of the fastening bolt 71 is inserted.
As a result, the load from the side member 2 is smoothly transmitted to the lower cross member 6 via the side member side fixing portion 82 and the inclined surface 83 of the bracket member 8, thereby suppressing local concentration of the load. ing.

さらに、本実施形態の車両側部構造において、フロア下の下側クロスメンバ６は、図２及び図３に示すように、本体部６１とフランジ部６２との境界領域Ｒにおいて、車両幅方向内側へ向かって湾曲する湾曲部６３を有している。すなわち、湾曲部６３は、下側クロスメンバ６の上側に位置するフランジ部６２から本体部６１の下側メンバ体６１ｂへ向かって車両幅方向内側へ湾曲した横置きの略Ｓ字形状に形成されており、湾曲部６３の周辺部は、本体部６１の下側メンバ体６１ｂに接合されている。このような形状の湾曲部６３によって、ブラケット部材８側の閉断面部Ｓ２と下側クロスメンバ６の本体部６１が有する閉断面部を合わせた合計閉断面部の断面積変化を減らし、合計閉断面部の面積を維持する構造が得られることになる。
また、下側クロスメンバ６の湾曲部６３は、車両上下方向の荷重に対して剛性を有している。そのため、当該湾曲部６３は、ブラケット部材８の傾斜面８３と車両幅方向で重なる位置に配置されている。これに伴い、湾曲部６３と本体部６１とが接合される部分に荷重が集中して変形が生じる場合に、湾曲部６３が傾斜面８３の範囲内に配置されていることから、傾斜面８３に荷重が伝達され、当該湾曲部６３への荷重集中が防げる構造になっている。 Further, in the vehicle side portion structure of the present embodiment, the underfloor lower cross member 6 is positioned inward in the vehicle width direction at the boundary region R between the body portion 61 and the flange portion 62, as shown in FIGS. It has a curved portion 63 that curves toward. That is, the curved portion 63 is formed in a substantially horizontal S-shape that curves inward in the vehicle width direction from the flange portion 62 positioned above the lower cross member 6 toward the lower member body 61b of the main body portion 61 . A peripheral portion of the curved portion 63 is joined to the lower member body 61 b of the main body portion 61 . The curved portion 63 having such a shape reduces the change in cross-sectional area of the total closed cross-sectional portion including the closed cross-sectional portion S2 on the bracket member 8 side and the closed cross-sectional portion of the body portion 61 of the lower cross member 6, thereby reducing the total closed cross-sectional area change. A structure that maintains the area of the cross section is obtained.
Further, the curved portion 63 of the lower cross member 6 has rigidity against the load in the vertical direction of the vehicle. Therefore, the curved portion 63 is arranged at a position overlapping the inclined surface 83 of the bracket member 8 in the vehicle width direction. As a result, when the load concentrates on the portion where the curved portion 63 and the main body portion 61 are joined together and deformation occurs, the curved portion 63 is arranged within the range of the inclined surface 83 . The load is transmitted to the curved portion 63, and the load concentration on the curved portion 63 can be prevented.

なお、本実施形態のブラケット部材８と下側クロスメンバ６のフランジ部６２との間には、図２及び図３に示すように、サイドメンバ２と下側クロスメンバ４との固定を補助する円筒形の固定補助部材７２が設けられている。固定補助部材７２は、ブラケット部材８のサイドメンバ側固定部８２と、下側クロスメンバ６の本体部６１の上側メンバ体６１ａとの上下間に配置可能で、かつ円筒体の上下面がサイドメンバ側固定部８２及び上側メンバ体６１ａと当接可能な上下長さを有している。また、固定補助部材７２は、締結ボルト７１を挿通させることが可能な内径を有している。しかも、固定部材７及び固定補助部材７２は、締結ボルト７１により締結されており、締結ボルト７１の車両幅方向の剛性を利用できる構造を有している。これにより、サイドメンバ２から入力される荷重が固定補助部材７２を介して下側クロスメンバ６に伝達されることになり、荷重の分散がさらに促進されるようになっている。 Between the bracket member 8 and the flange portion 62 of the lower cross member 6 of this embodiment, as shown in FIGS. A cylindrical fixation aid 72 is provided. The fixing auxiliary member 72 can be arranged between the upper and lower sides of the side member side fixing portion 82 of the bracket member 8 and the upper member body 61a of the main body portion 61 of the lower cross member 6, and the upper and lower surfaces of the cylindrical body are the side members. It has a vertical length that allows contact with the side fixing portion 82 and the upper member body 61a. In addition, the fixing auxiliary member 72 has an inner diameter through which the fastening bolt 71 can be inserted. Moreover, the fixing member 7 and the fixing auxiliary member 72 are fastened by the fastening bolts 71 and have a structure that can utilize the rigidity of the fastening bolts 71 in the vehicle width direction. As a result, the load input from the side member 2 is transmitted to the lower cross member 6 via the auxiliary fixing member 72, further promoting the distribution of the load.

本実施形態の車両側部構造におけるフロアパネル１は、図１～図４に示すように、車両上方（車室内側）へ向かって膨出する中央面１１を有しており、該中央面１１は、車室内側における車両上方視で四角形状に形成されている。また、本実施形態のフロアパネル１は、車両幅方向で車両内側の中央面１１から車両外側にかけて車両下方へ傾斜する傾斜面１２を有し、該傾斜面１２の下方には、電池パック、燃料タンク等の車載部材１００が搭載されている。一方、フロアパネル１の傾斜面１２には、図２～図４に示すように、サイドメンバ２に接合されるサイドメンバ側接合部９１を有するフロア補強部材９の車両外側端部９ａがサイドメンバ２の内側壁２ｂを介在させた状態で接合されており、フロア補強部材９の車両内側端部９ｂは、傾斜面１２よりも車両内側の位置（中央面１１）でフロアパネル１に接合されている。そのため、フロア補強部材９は、車両幅方向に延びながら、フロアパネル１の中央面１１及び傾斜面１２に沿って配置されている。
すなわち、本実施形態の車両側部構造は、車両幅方向外側からの荷重がサイドメンバ２に入力された場合において、フロアパネル１の傾斜面１２の車両内側への変形がフロア補強部材９により抑制され、サイドメンバ２への荷重伝達が円滑に行われる構造になっている。 As shown in FIGS. 1 to 4, the floor panel 1 in the vehicle side structure of the present embodiment has a central surface 11 that bulges upward (toward the interior of the vehicle). is formed in a quadrangular shape on the inside of the passenger compartment when viewed from above the vehicle. In addition, the floor panel 1 of the present embodiment has an inclined surface 12 that inclines downward in the vehicle width direction from a center surface 11 on the inner side of the vehicle to the outer side of the vehicle. An in-vehicle member 100 such as a tank is mounted. On the other hand, on the inclined surface 12 of the floor panel 1, as shown in FIGS. The vehicle-inside end portion 9b of the floor reinforcing member 9 is joined to the floor panel 1 at a position (center surface 11) inside the vehicle relative to the inclined surface 12. there is Therefore, the floor reinforcing member 9 is arranged along the central surface 11 and the inclined surface 12 of the floor panel 1 while extending in the vehicle width direction.
That is, in the vehicle side structure of the present embodiment, when a load is applied to the side member 2 from the outside in the vehicle width direction, the floor reinforcing member 9 suppresses the deformation of the inclined surface 12 of the floor panel 1 toward the inside of the vehicle. , so that the load can be smoothly transmitted to the side members 2 .

一方、本実施形態の衝撃吸収部材５は、図２及び図３に示すように、開口部が向き合って配置され、上下端部５１ａ，５１ｂ，５２ａ，５２ｂが車両幅方向でほぼ同じ位置において接合される断面ハット型形状の内側部材５１及び外側部材５２と、車両上下方向に真っ直ぐ延び、上下中間部５３ａ，５３ｂが内側部材５１及び外側部材５２の上下端部５１ａ，５１ｂ，５２ａ，５２ｂ間に挟持されているとともに、上下部５３ｃ，５３ｄがサイドシルインナパネル３１の上下端部３１ａ，３１ｂとサイドシルアウタパネル３２の上下端部３２ａ，３２ｂとの間に挟持された状態で接合される中央部材５３を有している。
そのため、車両幅方向の荷重がサイドシル３のサイドシルアウタパネル３２から衝撃吸収部材５に入力された場合、内側部材５１及び外側部材５２が、中央部材５３の介在により車両内側へ向かってほぼ均等に変形することになり、高い荷重吸収性能を有する衝撃吸収部材５がサイドシル３の内部に設けられていることになる。 On the other hand, as shown in FIGS. 2 and 3, the shock absorbing member 5 of the present embodiment has openings facing each other, and the upper and lower ends 51a, 51b, 52a, and 52b are joined at approximately the same positions in the vehicle width direction. The inner member 51 and the outer member 52 each having a hat-shaped cross section and the upper and lower middle portions 53a, 53b extending straight in the vertical direction of the vehicle are arranged between the upper and lower end portions 51a, 51b, 52a, 52b of the inner member 51 and the outer member 52. The central member 53 is sandwiched and joined with the upper and lower portions 53c and 53d sandwiched between the upper and lower end portions 31a and 31b of the side sill inner panel 31 and the upper and lower end portions 32a and 32b of the side sill outer panel 32. have.
Therefore, when a load in the vehicle width direction is input to the shock absorbing member 5 from the side sill outer panel 32 of the side sill 3, the inner member 51 and the outer member 52 are deformed almost uniformly toward the vehicle inner side due to the interposition of the central member 53. Therefore, the shock absorbing member 5 having high load absorbing performance is provided inside the side sill 3 .

このように、本発明の実施形態に係る車両側部構造では、フロアパネル１の下面の車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドメンバ２と、サイドメンバ２の車両幅方向外側に設けられ、車両前後方向に延びる左右一対のサイドシル３と、フロアパネル１の上面に設けられ、車両幅方向に延びて左右一対のサイドシル３を連結するフロア上の上側クロスメンバ４とを備えている。サイドシル３は、車両内側のサイドシルインナパネル３１及び車両外側のサイドシルアウタパネル３２で構成され、サイドシル３の内部には衝撃吸収部材５が設けられており、フロアパネル１の車両外側端部１ａは、サイドシル３に接合されるサイドシル側接合部１０を有している。また、サイドメンバ２とサイドシル３とは、車両幅方向で隣接して配置され、サイドメンバ２は、サイドシル３と少なくとも一部が車両側方視で重なる位置に配置されている。しかも、サイドメンバ２は、サイドシル３に接合され、車両前後方向に沿うように配置される第１接合部Ｗ１を有し、第１接合部Ｗ１は、車両側方視で衝撃吸収部材５の車両内側上部と重なる部分を有する位置に配置されている。
したがって、本発明の車両側部構造は、サイドメンバ２とサイドシル３とが車両幅方向において隣り合った状態で接合されることにより、車両外側のサイドシル３が車両内側のサイドメンバ２に支持される構造となるので、サイドシル３による車両幅方向からの荷重吸収性能を向上させることができる。また、本発明の車両側部構造においては、サイドメンバ２の第１接合部Ｗ１がフロアパネル１よりも車両上下方向で上側に位置することになるので、車両幅方向からの荷重入力時にサイドシル３がサイドメンバ２に対して車両上下方向にずれるのを抑制し、当該荷重をサイドメンバ２及びフロア上の上側クロスメンバ４に効率良く伝達させ、サイドシル３の車両内側への侵入量を低減させることができる。 As described above, in the vehicle side structure according to the embodiment of the present invention, the pair of left and right side members 2, which are provided on the vehicle width direction side portions of the lower surface of the floor panel 1 and extend in the vehicle front-rear direction, A pair of left and right side sills 3 provided outside in the width direction and extending in the longitudinal direction of the vehicle, and an upper floor cross member 4 provided on the upper surface of the floor panel 1 and extending in the width direction of the vehicle and connecting the pair of left and right side sills 3 . It has The side sill 3 is composed of a side sill inner panel 31 on the inner side of the vehicle and a side sill outer panel 32 on the outer side of the vehicle. 3 has a side sill side joint 10. The side member 2 and the side sill 3 are arranged adjacent to each other in the width direction of the vehicle, and the side member 2 is arranged so that at least a part of the side member 2 overlaps the side sill 3 when viewed from the side of the vehicle. Moreover, the side member 2 is joined to the side sill 3 and has a first joint portion W1 arranged along the vehicle front-rear direction. It is arranged in a position having a portion that overlaps with the inner upper portion.
Therefore, in the vehicle side structure of the present invention, the side member 2 and the side sill 3 are joined to each other so that they are adjacent to each other in the vehicle width direction, so that the side sill 3 on the vehicle outer side is supported by the side member 2 on the vehicle inner side. Since it becomes a structure, the load absorption performance from the vehicle width direction by the side sill 3 can be improved. In the vehicle side portion structure of the present invention, the first joint W1 of the side member 2 is positioned above the floor panel 1 in the vertical direction of the vehicle. is restrained from being displaced in the vertical direction of the vehicle with respect to the side member 2, the load is efficiently transmitted to the side member 2 and the upper cross member 4 on the floor, and the intrusion amount of the side sill 3 into the inside of the vehicle is reduced. can be done.

また、本実施形態の車両側部構造において、フロア上の上側クロスメンバ４は、車両幅方向で車両内側から車両外側にかけて車両下方へ傾斜して延びる傾斜部４２を備え、傾斜部４２は、車両幅方向外側端部４２ａでサイドシルインナパネル３１に接合される第２接合部Ｗ２を有しており、第２接合部Ｗ２は、サイドシルインナパネル３１の上面３１ｃに位置している。
したがって、本実施形態の車両側部構造では、フロア上の上側クロスメンバ４の第２接合部Ｗ２が車両上側からサイドシルインナパネル３１の上面３１ｃに接合され、サイドメンバ２の第１接合部Ｗ１が車両幅方向内側からサイドシルインナパネル３１の側面に接合され、２つの接合部Ｗ１，Ｗ２が互いに交差する位置に配置されることになるので、車両幅方向外側からの衝撃荷重によるサイドシル３の移動を抑制でき、サイドシル３による衝撃荷重の吸収効果を更に向上させることができる。 Further, in the vehicle side portion structure of the present embodiment, the upper cross member 4 on the floor includes an inclined portion 42 extending inclined downward from the vehicle inner side to the vehicle outer side in the vehicle width direction. It has a second joint portion W2 that is joined to the side sill inner panel 31 at the width direction outer end portion 42a.
Therefore, in the vehicle side structure of the present embodiment, the second joint W2 of the upper cross member 4 on the floor is joined to the upper surface 31c of the side sill inner panel 31 from the upper side of the vehicle, and the first joint W1 of the side member 2 is The side sill inner panel 31 is joined to the side surface of the side sill inner panel 31 from the inside in the vehicle width direction, and the two joining portions W1 and W2 are arranged at positions where they intersect each other. Therefore, the impact load absorption effect of the side sill 3 can be further improved.

そして、本実施形態の車両側部構造において、サイドメンバ２は、内側壁２ｂと外側壁２ｃを有しており、サイドメンバ２の内部には、内側壁２ｂと外側壁２ｃに接合されるリンフォースメント２１が設けられている。リンフォースメント２１の上側には、フロアパネル１と組み合わされることにより構成される上側閉断面部Ｓ１が設けられ、上側閉断面部Ｓ１は、車両側方視で衝撃吸収部材５と重なる位置に配置されている。
したがって、本実施形態の車両側部構造によれば、上側閉断面部Ｓ１が車両幅方向外側からの荷重に対して衝撃吸収部材５を支持することが可能となり、衝撃吸収部材５の荷重吸収性能をより一層促進することができる。 In the vehicle side structure of the present embodiment, the side member 2 has an inner wall 2b and an outer wall 2c. A force 21 is provided. Above the reinforcement 21, an upper closed cross-section portion S1 configured by combining with the floor panel 1 is provided. It is
Therefore, according to the vehicle side portion structure of the present embodiment, the upper closed section portion S1 can support the shock absorbing member 5 against the load from the outside in the vehicle width direction, and the load absorbing performance of the shock absorbing member 5 is improved. can be further promoted.

さらに、本実施形態の車両側部構造において、左右一対のサイドメンバ２の下側には、車両幅方向に延び、左右一対のサイドメンバ２を連結するフロア下の下側クロスメンバ６が設けられており、このフロア下の下側クロスメンバ６は、リンフォースメント２１に接合される固定部材７によってサイドメンバ２に固定されている。
したがって、本実施形態の車両側部構造では、サイドメンバ２内のリンフォースメント２１に側突時の衝撃荷重が入力された場合、この衝撃荷重は、固定部材７からフロア下の下側クロスメンバ６に伝達されることになるので、荷重の伝達性能を促進させて荷重の分散効果を高めることができ、従来の車両側部構造と比べて、サイドメンバ２をより強固に支持することができる。 Further, in the vehicle side structure of the present embodiment, a lower cross member 6 under the floor that extends in the vehicle width direction and connects the pair of left and right side members 2 is provided below the pair of left and right side members 2 . The lower cross member 6 under the floor is fixed to the side member 2 by a fixing member 7 joined to the reinforcement 21 .
Therefore, in the vehicle side structure of this embodiment, when an impact load at the time of a side collision is input to the reinforcement 21 in the side member 2, this impact load is transferred from the fixed member 7 to the lower cross member under the floor. 6, it is possible to promote the load transmission performance and enhance the load dispersion effect, and the side member 2 can be supported more firmly than the conventional vehicle side structure. .

そして、本実施形態の車両側部構造において、フロアパネル１は、車両幅方向で車両内側から車両外側にかけて車両下方へ傾斜する傾斜面１２を有し、傾斜面１２の下方には車載部材１００が搭載されている。一方、フロアパネル１の傾斜面１２には、サイドメンバ２に接合されるサイドメンバ側接合部９１を有するフロア補強部材９の車両外側端部９ａが接合され、フロア補強部材９の車両内側端部９ｂは、傾斜面１２よりも車両内側の位置でフロアパネル１に接合されている。
したがって、本実施形態の車両側部構造では、車両幅方向からの荷重がサイドメンバ２に入力された場合、フロアパネル１の傾斜面１２の車両内側への変形がフロア補強部材９によって抑制されることになるので、車両幅方向からの荷重がサイドメンバ２に伝達されやすくなり、車両幅方向の荷重伝達を促進させることができる。 In the vehicle side structure of the present embodiment, the floor panel 1 has an inclined surface 12 that inclines downward from the vehicle inner side to the vehicle outer side in the vehicle width direction. is installed. On the other hand, the vehicle outer side end portion 9a of the floor reinforcing member 9 having the side member side joint portion 91 joined to the side member 2 is joined to the inclined surface 12 of the floor panel 1, and the vehicle inner side end portion of the floor reinforcing member 9 is joined. 9b is joined to the floor panel 1 at a position on the inner side of the vehicle relative to the inclined surface 12. As shown in FIG.
Therefore, in the vehicle side structure of the present embodiment, when a load is applied to the side members 2 in the vehicle width direction, the floor reinforcing member 9 suppresses the deformation of the inclined surface 12 of the floor panel 1 toward the vehicle inner side. Therefore, the load from the vehicle width direction is easily transmitted to the side member 2, and the load transmission in the vehicle width direction can be promoted.

また、本実施形態の車両側部構造において、衝撃吸収部材５は、開口部が向き合って配置され、上下端部５１ａ，５１ｂ，５２ａ，５２ｂが車両幅方向でほぼ同じ位置において接合される断面ハット型形状の内側部材５１及び外側部材５２と、車両上下方向に真っ直ぐ延び、上下中間部５３ａ，５３ｂが内側部材５１及び外側部材５２の上下端部５１ａ，５１ｂ，５２ａ，５２ｂ間に挟持されているとともに、上下部５３ｃ，５３ｄがサイドシルインナパネル３１とサイドシルアウタパネル３２との間に挟持された状態で接合される中央部材５３を有している。
したがって、本実施形態の車両側部構造によれば、車両幅方向の荷重がサイドシル３のサイドシルアウタパネル３２から衝撃吸収部材５に入力された場合、中央部材５３が介在する内側部材５１及び外側部材５２を車両内側へ向かってほぼ均等に変形させることができ、衝撃吸収部材５の荷重吸収性能をより一層高めることができる。 In addition, in the vehicle side structure of the present embodiment, the shock absorbing member 5 is arranged such that the openings face each other, and the upper and lower ends 51a, 51b, 52a, 52b are joined at approximately the same positions in the vehicle width direction. Mold-shaped inner member 51 and outer member 52, and upper and lower intermediate portions 53a, 53b extending straight in the vertical direction of the vehicle are sandwiched between upper and lower end portions 51a, 51b, 52a, 52b of the inner member 51 and outer member 52. In addition, the upper and lower portions 53c and 53d of the side sill inner panel 31 and the side sill outer panel 32 have a central member 53 that is joined to them while being sandwiched between them.
Therefore, according to the vehicle side portion structure of the present embodiment, when a load in the vehicle width direction is input to the shock absorbing member 5 from the side sill outer panel 32 of the side sill 3, the inner member 51 and the outer member 52 with the central member 53 interposed therebetween can be deformed almost uniformly toward the inside of the vehicle, and the load absorbing performance of the impact absorbing member 5 can be further enhanced.

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 changes are possible based on the technical idea of the present invention.

１ フロアパネル
１ａ 車両外側端部
２ サイドメンバ
２ａ 下面
２ｂ 内側壁
２ｃ 外側壁
２ｄ 挿通孔
３ サイドシル
４ フロア上の上側クロスメンバ
５ 衝撃吸収部材
６ フロア下の下側クロスメンバ
７ 固定部材
７ａ 上部
７ｂ 下部
７ｃ 中間部
８ ブラケット部材
９ フロア補強部材
９ａ 車両外側端部
９ｂ 車両内側端部
１０ サイドシル側接合部
１２ フロアパネルの傾斜面
２１ リンフォースメント
２１ａ 取付面
２１ｂ，２１ｃ 側面
２１ｄ 取付孔
３１ サイドシルインナパネル
３１ａ 上端部
３１ｂ 下端部
３１ｃ 上面
３２ サイドシルアウタパネル
３２ａ 上端部
３２ｂ 下端部
４０ フロア上の上側クロスメンバのフランジ部
４１ フロア上の上側クロスメンバの本体部
４２ フロア上の上側クロスメンバの傾斜部
４２ａ 車両幅方向外側端部
５１ 衝撃吸収部材の内側部材
５１ａ 上端部
５１ｂ 下端部
５２ 衝撃吸収部材の外側部材
５２ａ 上端部
５２ｂ 下端部
５３ 中央部材
５３ａ 上中間部
５３ｂ 下中間部
５３ｃ 上部
５３ｄ 下部
６１ フロア下の下側クロスメンバの本体部
６１ｃ 挿通孔
６２ フロア下の下側クロスメンバのフランジ部
６２ａ 挿通孔
６３ 湾曲部
７１ 締結ボルト
８５ ブラケット部材の貫通孔
９１ フロア補強部材のサイドメンバ側接合部
１００ 車載部材
Ｓ１ 上側閉断面部
Ｗ１ 第１接合部
Ｗ２ 第２接合部 REFERENCE SIGNS LIST 1 floor panel 1a outer edge of vehicle 2 side member 2a lower surface 2b inner wall 2c outer wall 2d insertion hole 3 side sill 4 upper cross member above floor 5 impact absorbing member 6 lower cross member below floor 7 fixing member 7a upper portion 7b lower portion 7c Intermediate portion 8 Bracket member 9 Floor reinforcing member 9a Outer end of vehicle 9b Inner end of vehicle 10 Side sill side joint 12 Inclined surface of floor panel 21 Reinforcement 21a Mounting surface 21b, 21c Side surface 21d Mounting hole 31 Side sill inner panel 31a Upper end portion 31b Lower end portion 31c Upper surface 32 Side sill outer panel 32a Upper end portion 32b Lower end portion 40 Flange portion of upper cross member on floor 41 Body portion of upper cross member on floor 42 Inclined portion of upper cross member on floor 42a Vehicle width direction Outer end 51 Inner member of shock absorbing member 51a Upper end 51b Lower end 52 Outer member of shock absorbing member 52a Upper end 52b Lower end 53 Central member 53a Upper intermediate portion 53b Lower intermediate portion 53c Upper portion 53d Lower portion 61 Under the floor Body portion of cross member 61c Insertion hole 62 Flange portion of lower cross member under the floor 62a Insertion hole 63 Curved portion 71 Fastening bolt 85 Through hole of bracket member 91 Joint portion of floor reinforcing member on side member side 100 In-vehicle member S1 Upper closing Cross section W1 First joint W2 Second joint

Claims (5)

フロアパネルの下面の車両幅方向側部に設けられ、車両前後方向に延びる左右一対のサイドメンバと、該サイドメンバの車両幅方向外側に設けられ、車両前後方向に延びる左右一対のサイドシルと、前記フロアパネルの上面に設けられ、車両幅方向に延びて前記左右一対のサイドシルを連結するフロア上のクロスメンバとを備え、
前記サイドシルは、車両内側のサイドシルインナパネル及び車両外側のサイドシルアウタパネルで構成され、前記サイドシルの内部には衝撃吸収部材が設けられ、
前記フロアパネルの車両外側端部は、前記サイドシルに接合されるサイドシル側接合部を有している車両側部構造において、
前記サイドメンバと前記サイドシルとは、車両幅方向で隣接して配置され、前記サイドメンバは、前記サイドシルと少なくとも一部が車両側方視で重なる位置に配置され、
前記サイドメンバは、前記サイドシルに接合される第１接合部を有し、該第１接合部は、車両側方視で前記衝撃吸収部材の車両内側上部と重なる位置に配置され、
前記サイドメンバは、内側壁と外側壁を有し、前記サイドメンバの内部には、前記内側壁と前記外側壁に接合されるリンフォースメントが設けられ、該リンフォースメントの上側には、前記フロアパネルと組み合わされることにより構成される上側閉断面部が設けられ、該上側閉断面部は、車両側方視で前記衝撃吸収部材と重なる位置に配置されていることを特徴とする車両側部構造。 a pair of left and right side members provided on the vehicle width direction side portions of the lower surface of the floor panel and extending in the vehicle front-rear direction; a pair of left and right side sills provided outside the side members in the vehicle width direction and extending in the vehicle front-rear direction; a cross member on the floor that is provided on the upper surface of the floor panel and extends in the vehicle width direction to connect the pair of left and right side sills;
The side sill is composed of a side sill inner panel on the inner side of the vehicle and a side sill outer panel on the outer side of the vehicle, and a shock absorbing member is provided inside the side sill,
In the vehicle side structure, the vehicle outer side end portion of the floor panel has a side sill side joint portion that is joined to the side sill,
The side member and the side sill are arranged adjacent to each other in the vehicle width direction, and the side member is arranged at a position at least partially overlapping the side sill when viewed from the side of the vehicle,
The side member has a first joint portion that is joined to the side sill, and the first joint portion is arranged at a position overlapping an upper portion of the impact absorbing member on the inner side of the vehicle when viewed from the side of the vehicle ,
The side member has an inner wall and an outer wall, a reinforcement joined to the inner wall and the outer wall is provided inside the side member, and the reinforcement is provided on the upper side of the reinforcement. A vehicle side portion, comprising: an upper closed cross-sectional portion configured by combining with a floor panel; structure. 前記フロア上のクロスメンバは、車両幅方向で車両内側から車両外側にかけて車両下方へ傾斜して延びる傾斜部を備え、該傾斜部は、車両幅方向外側端部で前記サイドシルインナパネルに接合される第２接合部を有し、該第２接合部は、前記サイドシルインナパネルの上面に位置していることを特徴とする請求項１に記載の車両側部構造。 The cross member on the floor includes an inclined portion that extends inclined downward from the vehicle inner side to the vehicle outer side in the vehicle width direction, and the inclined portion is joined to the side sill inner panel at the vehicle width direction outer end portion. 2. The vehicle side structure according to claim 1, further comprising a second joint portion, wherein the second joint portion is located on the upper surface of the side sill inner panel. 前記左右一対のサイドメンバの下側には、車両幅方向に延び、前記左右一対のサイドメンバを連結するフロア下のクロスメンバが設けられ、該フロア下のクロスメンバは、前記リンフォースメントに接合される固定部材によって前記サイドメンバに固定されていることを特徴とする請求項１または２に記載の車両側部構造。 Under the pair of left and right side members, an underfloor cross member that extends in the vehicle width direction and connects the pair of left and right side members is provided, and the underfloor cross member is joined to the reinforcement. 3. The vehicle side structure according to claim 1, wherein the side member is fixed to the side member by a fixed member. 前記フロアパネルは、車両幅方向で車両内側から車両外側にかけて車両下方へ傾斜する傾斜面を有し、該傾斜面の下方には車載部材が搭載されている一方、
前記フロアパネルの前記傾斜面には、前記サイドメンバに接合されるサイドメンバ側接合部を有するフロア補強部材の車両外側端部が接合され、前記フロア補強部材の車両内側端部は、前記傾斜面よりも車両内側の位置で前記フロアパネルに接合され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両側部構造。 The floor panel has an inclined surface that inclines downward from the vehicle inner side to the vehicle outer side in the vehicle width direction, and an in-vehicle member is mounted below the inclined surface,
A vehicle outer side end portion of a floor reinforcing member having a side member side joint portion that is joined to the side member is joined to the inclined surface of the floor panel, and a vehicle inner side end portion of the floor reinforcing member is connected to the inclined surface. 4. The vehicle side structure according to any one of claims 1 to 3 , wherein the vehicle side structure is joined to the floor panel at a position on the inner side of the vehicle. 前記衝撃吸収部材は、開口部が向き合って配置され、上下端部が車両幅方向でほぼ同じ位置において接合される断面ハット型形状の内側部材及び外側部材と、車両上下方向に真っ直ぐ延び、上下中間部が前記内側部材及び前記外側部材の上下端部間に挟持されているとともに、上下部が前記サイドシルインナパネルと前記サイドシルアウタパネルとの間に挟持された状態で接合される中央部材を有していることを特徴とする請求項１に記載の車両側部構造。
The shock absorbing member includes an inner member and an outer member having a hat-shaped cross-section whose openings are arranged to face each other and whose upper and lower ends are joined at approximately the same position in the vehicle width direction, and an inner member and an outer member that extend straight in the vehicle vertical direction and extend vertically in the middle of the vehicle. a central member sandwiched between the upper and lower ends of the inner member and the outer member, and joined with the upper and lower portions sandwiched between the inner side sill panel and the outer side sill panel; 2. The vehicle side structure according to claim 1 , wherein:
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