JP2020185901A - Lower body structure of electric vehicle - Google Patents

Lower body structure of electric vehicle Download PDF

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JP2020185901A
JP2020185901A JP2019092089A JP2019092089A JP2020185901A JP 2020185901 A JP2020185901 A JP 2020185901A JP 2019092089 A JP2019092089 A JP 2019092089A JP 2019092089 A JP2019092089 A JP 2019092089A JP 2020185901 A JP2020185901 A JP 2020185901A
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vehicle
cross
width direction
floor
vehicle width
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JP7338231B2 (en
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大和 松田
Yamato Matsuda
大和 松田
伸之 中山
Nobuyuki Nakayama
伸之 中山
守英 山田
Moriei Yamada
守英 山田
勝人 河野
Katsuto Kono
勝人 河野
俊宏 竹林
Toshihiro Takebayashi
俊宏 竹林
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Mazda Motor Corp
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Mazda Motor Corp
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Priority to CN202010137677.5A priority patent/CN111942480B/en
Priority to EP20161417.9A priority patent/EP3738863B1/en
Priority to US16/833,377 priority patent/US11420686B2/en
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Abstract

To provide a lower body structure of an electric vehicle 1 that can achieve and secure both a foot space of an occupant and desired side collision performance.SOLUTION: A lower body structure of an electric vehicle 1 using output of a rotating electric machine as driving force comprises: a pair of left and right side sills 7; a nearly-flat front floor panel 8; and a second floor cross member 40, arranged on an upper surface of the front floor panel 8 between a front seat 18 and a rear seat, which connects in a vehicle width direction the left and right side sills 7 to each other, at a height lower than a height from the front floor panel 8 to an inner upper surface part 7a of the side sill 7. The second floor cross member 40 comprises, on a longitudinal section disposed along the vehicle width direction, an upward enlarged cross section part 40a having a cross sectional shape in the vicinity of an approximate center in the vehicle width direction enlarged toward an upper side of the vehicle so that an upper surface 43a is positioned at the upper side of the vehicle with respect to an upper surface in the vicinity of an end part in the vehicle width direction.SELECTED DRAWING: Figure 6

Description

この発明は、例えばフロアパネルの車両下方に排気管を備えていないような電動車両の下部車体構造に関する。 The present invention relates to a lower body structure of an electric vehicle, for example, which does not have an exhaust pipe below the vehicle on the floor panel.

昨今、ガソリンなどを燃料とする内燃機関に替えて、回転電機の出力を駆動力とする電動車両が増加している。このような電動車両は、回転電機に電力を供給する車載バッテリが、例えば、車室床面をなすフロアパネルの車両下方に配設されている（特許文献１、及び特許文献２参照）。 Recently, the number of electric vehicles that use the output of a rotary electric machine as a driving force is increasing instead of an internal combustion engine that uses gasoline or the like as fuel. In such an electric vehicle, an in-vehicle battery that supplies electric power to a rotary electric machine is arranged below the vehicle on a floor panel forming the floor surface of the vehicle interior (see Patent Documents 1 and 2).

ところで、特許文献１には、フロアパネルの上面に配設されるとともに、左右のサイドシルを車幅方向に連結するフロアクロスメンバが、フロアパネルの車幅方向略中央に設けたトンネル部を挟んで配設された車体構造が開示されている。
一方、特許文献２には、フロアパネルの上面に配設されるとともに、左右のサイドシルを車幅方向に連結フロアクロスメンバが、フロアパネルの車幅方向略中央に設けたトンネル部を跨ぐように配設された車体構造が開示されている。 By the way, in Patent Document 1, a floor cross member which is arranged on the upper surface of the floor panel and connects the left and right side sills in the vehicle width direction sandwiches a tunnel portion provided substantially in the center of the floor panel in the vehicle width direction. The arranged vehicle body structure is disclosed.
On the other hand, in Patent Document 2, the floor cross member is arranged on the upper surface of the floor panel and the left and right side sills are connected in the vehicle width direction so as to straddle the tunnel portion provided substantially in the center of the floor panel in the vehicle width direction. The arranged vehicle body structure is disclosed.

このように特許文献１、及び特許文献２には、フロアパネルの車幅方向略中央に、車両上方へ突出するとともに、車両前後方向に延びるトンネル部が形成されている。
このようなフロアパネルのトンネル部は、従来、内燃機関で発生した排気を車両後部から車外に排出する排気管の配置スペースとして用いられていたため、排気管が不要な電動車両には不要であった。 As described above, in Patent Document 1 and Patent Document 2, a tunnel portion is formed at substantially the center of the floor panel in the vehicle width direction so as to project upward from the vehicle and extend in the front-rear direction of the vehicle.
Since the tunnel portion of such a floor panel has conventionally been used as a space for arranging an exhaust pipe that exhausts the exhaust generated by the internal combustion engine from the rear part of the vehicle to the outside of the vehicle, it is not necessary for an electric vehicle that does not require an exhaust pipe. ..

さらに、排気管が不要な電動車両では、トンネル部を不要にすることで、車両重量の軽減や、乗員の足元における空間、すなわち乗員の足元空間の拡大を期待できる。
そこで、排気管が不要な電動車両では、排気管の配置スペースとしてのトンネル部を不要にして、比較的平坦なフロアパネルとフロアクロスメンバとで車室床面を構成することが検討されている。 Further, in an electric vehicle that does not require an exhaust pipe, by eliminating the need for a tunnel portion, it is expected that the weight of the vehicle will be reduced and the space at the feet of the occupants, that is, the space at the feet of the occupants will be expanded.
Therefore, in an electric vehicle that does not require an exhaust pipe, it is being studied to eliminate the need for a tunnel portion as a space for arranging the exhaust pipe and to form a passenger compartment floor surface with a relatively flat floor panel and a floor cross member. ..

しかしながら、乗員の足元空間を確保するために、左右のサイドシルを連結するフロアクロスメンバの高さを抑えた場合、車両側方からの衝突荷重に対する車室床面の剛性が、例えばトンネル部を設けた車室床面の剛性に比べて低くなり、所望される側突性能を確保できないおそれがあった。 However, when the height of the floor cross member connecting the left and right side sills is suppressed in order to secure the foot space of the occupant, the rigidity of the vehicle interior floor surface against the collision load from the vehicle side is provided, for example, a tunnel portion. It becomes lower than the rigidity of the floor surface of the passenger compartment, and there is a possibility that the desired lateral collision performance cannot be secured.

国際公開第２０１２／０６３３９３号International Publication No. 2012/063393 特開２０１３−１４７１３７号公報Japanese Unexamined Patent Publication No. 2013-147137

本発明は、上述の問題に鑑み、乗員の足元空間と、所望される側突性能とを両立して確保できる電動車両の下部車体構造を提供することを目的とする。 In view of the above problems, it is an object of the present invention to provide a lower body structure of an electric vehicle that can secure both a occupant's foot space and a desired lateral collision performance.

この発明は、回転電機の出力を駆動力とする電動車両の下部車体構造であって、車両前後方向に延びる左右一対のサイドシルと、該サイドシルの間に配設された略平坦なフロアパネルと、乗員が着席する前席と後席との間におけるフロアパネルの上面に配設されるとともに、前記フロアパネルから前記サイドシルの上面までの高さよりも低い高さで、左右の前記サイドシルを車幅方向に連結するフロアクロスメンバとを備え、該フロアクロスメンバが、車幅方向に沿った縦断面において、車幅方向端部近傍の上面に対して車両上方に上面が位置するように、車幅方向略中央近傍の断面形状を車両上方に拡大させた上方拡大断面部を備えたことを特徴とする。
上記略平坦なフロアパネルとは、車両上方へ突出するとともに、車両前後方向に延びるトンネル部が設けられていないフロアパネルのことをいう。 The present invention is a lower body structure of an electric vehicle that uses the output of a rotary electric machine as a driving force, and comprises a pair of left and right side sills extending in the front-rear direction of the vehicle, a substantially flat floor panel arranged between the side sills, and a substantially flat floor panel. It is arranged on the upper surface of the floor panel between the front seat and the rear seat where the occupant is seated, and the left and right side sill are placed in the vehicle width direction at a height lower than the height from the floor panel to the upper surface of the side sill. The floor cross member is provided with a floor cross member connected to the vehicle width direction so that the upper surface is located above the vehicle surface with respect to the upper surface near the end portion in the vehicle width direction in a vertical cross section along the vehicle width direction. It is characterized by having an upward enlarged cross-sectional portion in which the cross-sectional shape near the center is enlarged upward of the vehicle.
The substantially flat floor panel refers to a floor panel that projects upward from the vehicle and is not provided with a tunnel portion that extends in the front-rear direction of the vehicle.

この発明により、乗員の足元空間と、所望される側突性能とを両立して確保することができる。
具体的には、前席と後席との間に配設されたフロアクロスメンバを、フロアパネルからサイドシルの上面までの高さよりも低い高さとしたことにより、電動車両の下部車体構造は、フロアパネルからサイドシルの上面までの高さと略同じ高さのフロアクロスメンバに比べて、後席に着席する乗員の足元空間を広く確保することができる。 According to the present invention, it is possible to secure both the foot space of the occupant and the desired lateral collision performance.
Specifically, the floor cross member arranged between the front seat and the rear seat has a height lower than the height from the floor panel to the upper surface of the side sill, so that the lower body structure of the electric vehicle is the floor. Compared to the floor cross member, which is approximately the same height as the height from the panel to the upper surface of the side sill, it is possible to secure a wider foot space for the occupants seated in the rear seats.

さらに、フロアクロスメンバが上方拡大断面部を備えたことにより、電動車両の下部車体構造は、車幅方向に長いフロアクロスメンバにおける車幅方向略中央近傍の剛性を向上することができる。
これにより、電動車両の下部車体構造は、車両側方からの衝突荷重に対する車室床面の剛性を向上することができる。 Further, since the floor cross member is provided with the upward enlarged cross section, the lower body structure of the electric vehicle can improve the rigidity of the floor cross member long in the vehicle width direction in the vicinity of substantially the center in the vehicle width direction.
As a result, the lower body structure of the electric vehicle can improve the rigidity of the vehicle interior floor surface against a collision load from the vehicle side.

このため、電動車両の下部車体構造は、車両側方からの側突荷重が加わった際、例えば、フロアパネルが車幅方向略中央で座屈変形する、あるいは折れ曲がり変形することを抑制できる。
従って、電動車両の下部車体構造は、乗員の足元空間と、所望される側突性能とを両立して確保することができる。 Therefore, the lower body structure of the electric vehicle can suppress, for example, buckling deformation or bending deformation of the floor panel at substantially the center in the vehicle width direction when a lateral thrust load from the vehicle side is applied.
Therefore, the lower body structure of the electric vehicle can secure both the foot space of the occupant and the desired lateral collision performance.

この発明の態様として、前記フロアクロスメンバが、左右の前記サイドシルを連結するとともに、前記フロアパネルとで車幅方向に延びる閉断面をなすクロスメンバ本体と、該クロスメンバ本体に固定されるとともに、前記上方拡大断面部をなすクロスメンバ補強部材とで構成され、前記クロスメンバ本体が、略平坦で、かつ平面視略矩形の上面を有する形状に形成されてもよい。 As an aspect of the present invention, the floor cross member connects the left and right side sills, is fixed to the cross member main body having a closed cross section extending in the vehicle width direction with the floor panel, and is fixed to the cross member main body. It may be formed of the cross member reinforcing member forming the upward enlarged cross-sectional portion, and the cross member main body may be formed in a shape having a substantially flat upper surface and a substantially rectangular upper surface in a plan view.

この発明により、電動車両の下部車体構造は、クロスメンバ本体の上面における前端に沿った稜線、及び後端に沿った稜線を、略一直線状にすることができる。このため、電動車両の下部車体構造は、車両側方からの衝突荷重を、一方のサイドシルからフロアクロスメンバを介して、他方のサイドシルに効率よく伝達することができる。
従って、電動車両の下部車体構造は、乗員の足元空間を損なうことなく、安定した側突性能を確保することができる。 According to the present invention, in the lower body structure of the electric vehicle, the ridge line along the front end and the ridge line along the rear end on the upper surface of the cross member main body can be made substantially linear. Therefore, the lower body structure of the electric vehicle can efficiently transmit the collision load from the side of the vehicle from one side sill to the other side sill via the floor cross member.
Therefore, the lower body structure of the electric vehicle can ensure stable lateral collision performance without impairing the foot space of the occupant.

また、この発明の態様として、前記フロアパネルに配設されるとともに、前記サイドシルの近傍を車両前後方向に延びる左右一対のフロアフレームを備え、前記クロスメンバ本体が、前記フロアフレームの間に位置するメンバ中央部と、該メンバ中央部の車幅方向両端に位置する左右一対のメンバ端部とで構成され、前記メンバ中央部が、前記メンバ端部の剛性よりも高剛性な一つの部材で構成されてもよい。 Further, as an aspect of the present invention, the floor panel is provided with a pair of left and right floor frames extending in the front-rear direction of the vehicle in the vicinity of the side sill, and the cross member main body is located between the floor frames. It is composed of a member central portion and a pair of left and right member end portions located at both ends in the vehicle width direction of the member central portion, and the member central portion is composed of one member having a rigidity higher than the rigidity of the member end portion. May be done.

この発明により、電動車両の下部車体構造は、左右のフロアフレームの間における車室床面の剛性を向上できるため、より安定した側突性能を確保することができる。
具体的には、フロアクロスメンバのメンバ端部が、フロアフレームとサイドシルとの間に位置するため、電動車両の下部車体構造は、サイドシルに作用する車両側方からの衝突荷重を、フロアクロスメンバのメンバ端部を介して、フロアフレームと、フロアクロスメンバのメンバ中央部とに分散伝達することができる。 According to the present invention, the lower body structure of the electric vehicle can improve the rigidity of the vehicle interior floor surface between the left and right floor frames, so that more stable lateral collision performance can be ensured.
Specifically, since the member end of the floor cross member is located between the floor frame and the side sill, the lower body structure of the electric vehicle applies the collision load acting on the side sill from the vehicle side to the floor cross member. It can be distributed and transmitted to the floor frame and the central part of the member of the floor cross member through the member end of the floor cross member.

この際、メンバ中央部の剛性に対してメンバ端部の剛性が低いため、電動車両の下部車体構造は、車両側方からの衝突荷重を、メンバ端部の変形によって吸収することができる。このため、電動車両の下部車体構造は、メンバ中央部に作用する車両側方からの側突荷重を抑えることができる。
これにより、電動車両の下部車体構造は、左右のフロアフレームの間における車室床面の剛性を向上できるため、より安定した側突性能を確保することができる。 At this time, since the rigidity of the member end portion is lower than the rigidity of the member central portion, the lower body structure of the electric vehicle can absorb the collision load from the vehicle side by the deformation of the member end portion. Therefore, the lower body structure of the electric vehicle can suppress the lateral impact load acting on the central portion of the member from the side of the vehicle.
As a result, the lower body structure of the electric vehicle can improve the rigidity of the vehicle interior floor surface between the left and right floor frames, so that more stable lateral collision performance can be ensured.

また、この発明の態様として、前記クロスメンバ補強部材が、車両前後方向に沿った縦断面において、前記クロスメンバ本体の下端を介して前記フロアパネルに接合されるとともに、前記クロスメンバ本体とで閉断面をなす断面形状に形成されてもよい。 Further, as an aspect of the present invention, the cross member reinforcing member is joined to the floor panel via the lower end of the cross member main body in a vertical cross section along the vehicle front-rear direction, and is closed by the cross member main body. It may be formed in a cross-sectional shape forming a cross section.

この発明により、電動車両の下部車体構造は、フロアクロスメンバの車幅方向略中央近傍における剛性をより向上することができる。このため、電動車両の下部車体構造は、乗員の足元空間を損なうことなく、さらに安定した側突性能を確保することができる。 According to the present invention, the lower body structure of the electric vehicle can further improve the rigidity of the floor cross member in the vicinity of substantially the center in the vehicle width direction. Therefore, the lower body structure of the electric vehicle can secure more stable lateral collision performance without impairing the foot space of the occupant.

また、この発明の態様として、前記クロスメンバ補強部材の上面が、車幅方向の両端に前記前席の後方脚部が固定される座席固定部を備え、該座席固定部が、車幅方向に沿った縦断面において、前記上方拡大断面部の上面における車幅方向略中央に略同じ車両上下方向の位置に形成されてもよい。 Further, as an aspect of the present invention, the upper surface of the cross member reinforcing member is provided with seat fixing portions to which the rear legs of the front seats are fixed at both ends in the vehicle width direction, and the seat fixing portions are provided in the vehicle width direction. In the vertical cross section along the line, the vehicle may be formed at substantially the same vertical position in the vehicle width direction on the upper surface of the upward enlarged cross section.

この発明により、電動車両の下部車体構造は、座席固定部を設けた場合であっても、クロスメンバ補強部材の上面における前端に沿った稜線、及び後端に沿った稜線を略一直線状に形成することができる。このため、電動車両の下部車体構造は、車両側方からの衝突荷重を、一方のサイドシルからフロアクロスメンバを介して、他方のサイドシルにさらに効率よく伝達することができる。 According to the present invention, the lower body structure of the electric vehicle forms a ridge line along the front end and a ridge line along the rear end on the upper surface of the cross member reinforcing member in a substantially straight line even when a seat fixing portion is provided. can do. Therefore, the lower body structure of the electric vehicle can more efficiently transmit the collision load from the side of the vehicle from one side sill to the other side sill via the floor cross member.

さらに、電動車両の下部車体構造は、クロスメンバ補強部材の上面における車両上下方向の凹凸を抑えることができるため、フロアクロスメンバの高さを抑えることができるとともに、クロスメンバ補強部材の成形性を向上することができる。
従って、電動車両の下部車体構造は、乗員の足元空間と、安定した側突性能と、フロアクロスメンバの成形性とを確保することができる。 Further, the lower body structure of the electric vehicle can suppress unevenness in the vertical direction of the vehicle on the upper surface of the cross member reinforcing member, so that the height of the floor cross member can be suppressed and the formability of the cross member reinforcing member can be improved. Can be improved.
Therefore, the lower body structure of the electric vehicle can secure the foot space of the occupant, stable side collision performance, and moldability of the floor cross member.

また、この発明の態様として、車両前後方向に長い長尺形状で、前部、及び後部が車体に連結された長尺部材を備え、該長尺部材が、車幅方向に沿った縦断面において、車幅方向に対向する左右一対の側壁部を有する断面略門型形状に形成され、前記長尺部材の前記側壁部が、前記フロアクロスメンバの前記上方拡大断面部に固定されてもよい。 Further, as an aspect of the present invention, a long member having a long shape in the front-rear direction of the vehicle and having a front portion and a rear portion connected to a vehicle body is provided, and the long member has a vertical cross section along the vehicle width direction. The side wall portion of the long member may be fixed to the upward enlarged cross-sectional portion of the floor cross member, which is formed in a substantially gate-shaped cross section having a pair of left and right side wall portions facing in the vehicle width direction.

上記長尺部材は、例えば、センターコンソールを支持する支持部材、シフトレバーを支持する支持部材、あるいは車両前後方向へ荷重を伝達する部材として機能する荷重伝達部材などのことをいう。 The long member refers to, for example, a support member that supports the center console, a support member that supports the shift lever, a load transmission member that functions as a member that transmits a load in the front-rear direction of the vehicle, and the like.

この発明により、電動車両の下部車体構造は、重量の増加を抑えて、より一層安定した側突性能を確保することができる。
具体的には、車幅方向に長尺なフロアクロスメンバの上方拡大断面部を、前部、及び後部が車体に連結された長尺部材で支持できるため、電動車両の下部車体構造は、フロアクロスメンバにおける車幅方向略中央近傍の剛性を向上することができる。 According to the present invention, the lower body structure of the electric vehicle can suppress the increase in weight and secure more stable lateral collision performance.
Specifically, since the upwardly enlarged cross section of the floor cross member that is long in the vehicle width direction can be supported by the long member whose front and rear parts are connected to the vehicle body, the lower body structure of the electric vehicle is the floor. It is possible to improve the rigidity of the cross member near the center in the vehicle width direction.

さらに、長尺部材の側壁部が上方拡大断面部に固定されているため、電動車両の下部車体構造は、フロアクロスメンバに作用した車両側方からの側突荷重を、長尺部材を介して車両前後方向に分散伝達することができる。このため、電動車両の下部車体構造は、車両側方からの側突荷重に対する車室床面の剛性を向上することができる。 Further, since the side wall portion of the long member is fixed to the upward enlarged cross-sectional portion, the lower body structure of the electric vehicle applies the lateral thrust load acting on the floor cross member from the vehicle side via the long member. It can be distributed and transmitted in the front-rear direction of the vehicle. Therefore, the lower body structure of the electric vehicle can improve the rigidity of the vehicle interior floor surface with respect to the lateral impact load from the vehicle side.

加えて、長尺部材の側壁部がフロアパネルに固定されていないため、電動車両の下部車体構造は、長尺部材の側壁部がフロアパネルに固定される場合に比べて、側壁部における車両上下方向の長さを短くすることができる。これにより、電動車両の下部車体構造は、側壁部がフロアパネルに固定される場合に比べて、長尺部材の重量を抑えることができる。
従って、電動車両の下部車体構造は、重量の増加を抑えて、より一層安定した側突性能を確保することができる。 In addition, since the side wall portion of the long member is not fixed to the floor panel, the lower body structure of the electric vehicle is higher and lower than the case where the side wall portion of the long member is fixed to the floor panel. The length in the direction can be shortened. As a result, in the lower body structure of the electric vehicle, the weight of the long member can be suppressed as compared with the case where the side wall portion is fixed to the floor panel.
Therefore, the lower body structure of the electric vehicle can suppress the increase in weight and secure more stable lateral collision performance.

本発明により、乗員の足元空間と、所望される側突性能とを両立して確保できる電動車両の下部車体構造を提供することができる。 INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a lower body structure of an electric vehicle that can secure both a occupant's foot space and a desired lateral collision performance.

電動車両の車室部分における外観を示す外観斜視図。The external perspective view which shows the appearance in the passenger compartment part of an electric vehicle. 電動車両の下部車体における外観を示す外観斜視図。The external perspective view which shows the appearance of the lower body of an electric vehicle. 平面視における下部車体の外観を示す平面図。A plan view showing the appearance of the lower vehicle body in a plan view. 図３中のＡ−Ａ矢視断面図。A cross-sectional view taken along the line AA in FIG. 膨出部材における車両後方視の外観を示す外観斜視図。The external perspective view which shows the appearance of the vehicle rear view of the bulging member. 図３中のＢ−Ｂ矢視断面図。FIG. 3 is a cross-sectional view taken along the line BB in FIG. 図４中における車両後方側の要部の拡大断面を示す拡大断面図。FIG. 4 is an enlarged cross-sectional view showing an enlarged cross section of a main part on the rear side of the vehicle in FIG. キックアップ補強部材における車両前方視の外観を示す外観斜視図。The external perspective view which shows the appearance of the vehicle forward view in the kick-up reinforcing member. 図３中のＣ−Ｃ矢視断面図。FIG. 3 is a cross-sectional view taken along the line CC in FIG. 図３中のＤ−Ｄ矢視断面図。FIG. 3 is a cross-sectional view taken along the line DD in FIG. 第２支持ブラケットにおける車両後方視の外観を示す外観斜視図。The external perspective view which shows the appearance of the vehicle rear view in the 2nd support bracket.

この発明の一実施形態を以下図面と共に説明する。
本実施形態の車両は、例えば、リチウムイオン二次電池などのバッテリユニットと、バッテリユニットからの電力供給によって回動する回転電機とを備えるともに、回転電機の出力を駆動力とする電動車両である。このような電動車両１の車室部分における下部車体構造について、図１から図１１を用いて詳しく説明する。 An embodiment of the present invention will be described below with reference to the drawings.
The vehicle of the present embodiment is, for example, an electric vehicle including a battery unit such as a lithium ion secondary battery and a rotating electric machine that rotates by supplying electric power from the battery unit, and using the output of the rotating electric machine as a driving force. .. The lower vehicle body structure in the passenger compartment portion of the electric vehicle 1 will be described in detail with reference to FIGS. 1 to 11.

なお、図１は電動車両１の車室部分における外観斜視図を示す、図２は電動車両１の下部車体における外観斜視図を示し、図３は下部車体の平面図を示し、図４は図３中のＡ−Ａ矢視断面図を示し、図５は膨出部材１４における車両後方視の外観斜視図を示している。 Note that FIG. 1 shows an external perspective view of the passenger compartment portion of the electric vehicle 1, FIG. 2 shows an external perspective view of the lower vehicle body of the electric vehicle 1, FIG. 3 shows a plan view of the lower vehicle body, and FIG. The cross-sectional view taken along the line AA in No. 3 is shown, and FIG. 5 shows an external perspective view of the bulging member 14 when viewed from the rear of the vehicle.

さらに、図６は図３中のＢ−Ｂ矢視断面図を示し、図７は図４中における車両後方側の要部の拡大断面図を示し、図８はキックアップ補強部材５０における車両前方視の外観斜視図を示し、図９は図３中のＣ−Ｃ矢視断面図を示し、図１０は図３中のＤ−Ｄ矢視断面図を示し、図１１は第２支持ブラケット６２における車両後方視の外観斜視図を示している。 Further, FIG. 6 shows a cross-sectional view taken along the line BB in FIG. 3, FIG. 7 shows an enlarged cross-sectional view of a main part on the rear side of the vehicle in FIG. 4, and FIG. 8 shows the front of the vehicle in the kick-up reinforcing member 50. A perspective view of the appearance of the visual view is shown, FIG. 9 shows a cross-sectional view taken along the line CC in FIG. 3, FIG. 10 shows a cross-sectional view taken along the line DD in FIG. 3, and FIG. 11 shows a second support bracket 62. The external perspective view of the vehicle rear view is shown.

また、図示を明確にするため、図１、図２、及び図３中において、サイドシルアウタ７Ａの図示を省略するとともに、図４、図６、及び図７中において、フロントフロアパネル８の車両下方に配設されたバッテリユニット１６の詳細な図示を省略している。 Further, in order to clarify the illustration, the side sill outer 7A is omitted in FIGS. 1, 2, and 3, and the front floor panel 8 is below the vehicle in FIGS. 4, 6, and 7. The detailed illustration of the battery unit 16 arranged in the above is omitted.

また、図中において、矢印Ｆｒ及び矢印Ｒｒは前後方向を示しており、矢印Ｆｒは前方を示し、矢印Ｒｒは後方を示している。さらに、矢印Ｒｈ及び矢印Ｌｈは車幅方向を示しており、矢印Ｒｈは右方向を示し、矢印Ｌｈは左方向を示している。 Further, in the figure, the arrow Fr and the arrow Rr indicate the front-rear direction, the arrow Fr indicates the front direction, and the arrow Rr indicates the rear direction. Further, the arrow Rh and the arrow Lh indicate the vehicle width direction, the arrow Rh indicates the right direction, and the arrow Lh indicates the left direction.

電動車両１の車室には、図１に示すように、車室前部にインストルメントパネル２が配設され、インストルメントパネル２における車幅方向略中央の車両下方にセンターコンソール３、及びシフトレバー４が配設されている。
なお、詳細な図示を省略するが、電動車両１の車室には、センターコンソール３を挟んで２つの前席が配設され、センターコンソール３よりも車両後方に後席が配設されているものとする。 As shown in FIG. 1, in the passenger compartment of the electric vehicle 1, an instrument panel 2 is arranged in the front portion of the passenger compartment, and a center console 3 and a shift are provided below the vehicle substantially in the center of the instrument panel 2 in the vehicle width direction. The lever 4 is arranged.
Although detailed illustration is omitted, in the passenger compartment of the electric vehicle 1, two front seats are arranged across the center console 3, and rear seats are arranged behind the center console 3. It shall be.

また、センターコンソール３は、図１に示すように、インストルメントパネル２の車両下方に位置するセンターコンソール前部３Ａと、センターコンソール前部３Ａの車両後方側に連結されたセンターコンソール後部３Ｂとで構成されている。
このセンターコンソール後部３Ｂには、図１に示すように、シフトレバー４の基部を覆う意匠パネルが一体的に設けられ、その車両後方に、カップホルダー３ａ、及びアームレスト３ｂがこの順番で配設されている。 Further, as shown in FIG. 1, the center console 3 is composed of a center console front portion 3A located below the vehicle of the instrument panel 2 and a center console rear portion 3B connected to the vehicle rear side of the center console front portion 3A. It is configured.
As shown in FIG. 1, a design panel covering the base of the shift lever 4 is integrally provided on the rear portion 3B of the center console, and a cup holder 3a and an armrest 3b are arranged in this order behind the vehicle. ing.

また、シフトレバー４は、図２に示すように、シフトレバー支持ブラケット５を介して、後述するコンソール支持ブラケット６０に載置固定されている。このシフトレバー支持ブラケット５は、その前部が後述する第１フロアクロスメンバ３０の上面に締結固定され、後部が立設ブラケット７０の上面に締結固定されている。 Further, as shown in FIG. 2, the shift lever 4 is mounted and fixed to the console support bracket 60, which will be described later, via the shift lever support bracket 5. The front portion of the shift lever support bracket 5 is fastened and fixed to the upper surface of the first floor cross member 30, which will be described later, and the rear portion is fastened and fixed to the upper surface of the upright bracket 70.

このような電動車両１の車室部分における下部車体は、図１及び図２に示すように、モータルームと車室とを車両前後方向に仕切るダッシュパネル６と、ダッシュパネル６における車幅方向両端の下部から車両後方に延びる左右一対のサイドシル７と、左右のサイドシル７の間に配設され、車室床面をなすフロントフロアパネル８と、フロントフロアパネル８の後端から車両上方に段上げされたキックアップ部９と、キックアップ部９の後端に連結されたリヤフロアパネル１０とを備えている。 As shown in FIGS. 1 and 2, the lower body of the electric vehicle 1 in the passenger compartment has a dash panel 6 that separates the motor chamber and the passenger compartment in the front-rear direction of the vehicle, and both ends of the dash panel 6 in the vehicle width direction. A pair of left and right side sills 7 extending from the lower part of the vehicle to the rear of the vehicle, a front floor panel 8 arranged between the left and right side sills 7 to form the floor of the passenger compartment, and a step up from the rear end of the front floor panel 8 to the upper part of the vehicle. The kick-up portion 9 is provided, and the rear floor panel 10 connected to the rear end of the kick-up portion 9 is provided.

さらに、電動車両１の下部車体は、図１及び図２に示すように、ダッシュパネル６、及びフロントフロアパネル８に跨って車両前後方向に延びる左右一対のフロアフレームアッパ１１と、フロアフレームアッパ１１の後端から車両後方に延びる左右一対のフロアフレームロア１２（図３参照）と、左右のサイドシル７を車幅方向に連結する第１フロアクロスメンバ３０、及び第２フロアクロスメンバ４０とを備えている。 Further, as shown in FIGS. 1 and 2, the lower body of the electric vehicle 1 includes a pair of left and right floor frame uppers 11 extending in the front-rear direction of the vehicle straddling the dash panel 6 and the front floor panel 8, and the floor frame upper 11. A pair of left and right floor frame lowers 12 (see FIG. 3) extending from the rear end to the rear of the vehicle, a first floor cross member 30 for connecting the left and right side sills 7 in the vehicle width direction, and a second floor cross member 40 are provided. ing.

加えて、電動車両１の下部車体は、図１及び図２に示すように、フロントフロアパネル８の後端近傍とキックアップ部９とを連結するキックアップ補強部材５０と、シフトレバー４、及びセンターコンソール３を支持するコンソール支持ブラケット６０と、コンソール支持ブラケット６０を車両下方から支持する立設ブラケット７０とを備えている。 In addition, as shown in FIGS. 1 and 2, the lower body of the electric vehicle 1 includes a kick-up reinforcing member 50 that connects the vicinity of the rear end of the front floor panel 8 and the kick-up portion 9, a shift lever 4, and a shift lever 4. It includes a console support bracket 60 that supports the center console 3 and an upright bracket 70 that supports the console support bracket 60 from below the vehicle.

具体的には、ダッシュパネル６は、車両前後方向に厚みを有するパネル部材であって、その下部が車両後方へ向けて湾曲した形状に形成されている。このダッシュパネル６には、図２から図４に示すように、車幅方向略中央近傍に、車両前方上方から車両後方下方へ向けて延びる略トンネル状に膨出させたトンネル形状部６ａが形成されている。
トンネル形状部６ａは、ダッシュパネル６における車幅方向略中央近傍を切欠いた開口を覆う別部材で構成され、ダッシュパネル６に接合されることで、ダッシュパネル６に一体的に形成されている。 Specifically, the dash panel 6 is a panel member having a thickness in the front-rear direction of the vehicle, and its lower portion is formed in a shape curved toward the rear of the vehicle. As shown in FIGS. 2 to 4, the dash panel 6 is formed with a tunnel-shaped portion 6a bulging in a substantially tunnel shape extending from the upper front of the vehicle to the lower rear of the vehicle in the vicinity of the center in the vehicle width direction. Has been done.
The tunnel shape portion 6a is formed of a separate member that covers an opening notched in the vicinity of the center in the vehicle width direction of the dash panel 6, and is integrally formed with the dash panel 6 by being joined to the dash panel 6.

また、左右のサイドシル７は、車幅方向沿った縦断面における断面形状が、断面略矩形の閉断面をなすように構成されている（図６参照）。
より詳しくは、サイドシル７は、車幅方向に沿った縦断面において、車幅方向外側に突出した断面略ハット状のサイドシルアウタ７Ａ（図６参照）と、車幅方向内側に突出した断面略ハット状のサイドシルインナ７Ｂ（図６参照）とで構成されている。 Further, the left and right side sills 7 are configured such that the cross-sectional shape in the vertical cross section along the vehicle width direction is a closed cross section having a substantially rectangular cross section (see FIG. 6).
More specifically, the side sill 7 has a side sill outer 7A (see FIG. 6) having a substantially hat-shaped cross section protruding outward in the vehicle width direction and a substantially hat cross section protruding inward in the vehicle width direction in a vertical cross section along the vehicle width direction. It is composed of a side silly inner 7B (see FIG. 6).

また、フロントフロアパネル８は、図２から図４に示すように、車両上下方向に厚みを有する略平坦なパネル部材であって、その前端がダッシュパネル６の下端に接合され、後端が後述するキックアップ部９の下端に接合されている。 Further, as shown in FIGS. 2 to 4, the front floor panel 8 is a substantially flat panel member having a thickness in the vertical direction of the vehicle, the front end thereof is joined to the lower end of the dash panel 6, and the rear end thereof is described later. It is joined to the lower end of the kick-up portion 9.

このフロントフロアパネル８の前部には、図４に示すように、車幅方向略中央近傍を、ダッシュパネル６におけるトンネル形状部６ａの内部空間に連続するように切欠いた前方開口Ｓ１が開口形成されている。
一方、フロントフロアパネル８の後部には、図４に示すように、車幅方向略中央近傍を、後述するキックアップ補強部材５０の内部空間に連続するように切欠いた後方開口Ｓ２が開口形成されている。 As shown in FIG. 4, a front opening S1 is formed in the front portion of the front floor panel 8 so as to be continuous with the internal space of the tunnel-shaped portion 6a in the dash panel 6 in the vicinity of the substantially center in the vehicle width direction. Has been done.
On the other hand, as shown in FIG. 4, a rear opening S2 is formed in the rear portion of the front floor panel 8 so as to be continuous with the internal space of the kick-up reinforcing member 50 described later in the vicinity of the substantially center in the vehicle width direction. ing.

そして、上述したフロントフロアパネル８には、図２から図４に示すように、前方開口Ｓ１を覆うとともに、ダッシュパネル６のトンネル形状部６ａから連続するように車両上方に膨出した膨出部材１４が接合されている。なお、膨出部材１４は、フロントフロアパネル８の前端から第１フロアクロスメンバ３０の前端に至る車両前後方向の長さで形成されている。 Then, as shown in FIGS. 2 to 4, the above-mentioned front floor panel 8 covers the front opening S1 and is a bulging member that bulges upward from the tunnel-shaped portion 6a of the dash panel 6 so as to be continuous. 14 are joined. The bulging member 14 is formed with a length from the front end of the front floor panel 8 to the front end of the first floor cross member 30 in the vehicle front-rear direction.

より詳しくは、膨出部材１４は、図４及び図５に示すように、車幅方向で対向する側面視略三角形状の左右一対の側壁部１４ａと、前端に対して後端が車両下方に位置するように傾斜した後壁部１４ｂと、側壁部１４ａの下端、及び後壁部１４ｂの下端に沿ったフランジ部１４ｃとで、車両前方、及び車両下方が開口した略ボックス状に形成されている。 More specifically, as shown in FIGS. 4 and 5, the bulging member 14 has a pair of left and right side wall portions 14a having a substantially triangular side view facing each other in the vehicle width direction, and the rear end thereof is below the vehicle with respect to the front end. The rear wall portion 14b inclined so as to be located, the lower end of the side wall portion 14a, and the flange portion 14c along the lower end of the rear wall portion 14b are formed in a substantially box shape in which the front portion of the vehicle and the lower portion of the vehicle are open. There is.

この膨出部材１４は、側壁部１４ａの前部、及び後壁部１４ｂの前部が、ダッシュパネル６のトンネル形状部６ａに接合され、フランジ部１４ｃがフロントフロアパネル８の上面に接合されることで、ダッシュパネル６のトンネル形状部６ａに連続する略トンネル状の空間を形成している。 In the bulging member 14, the front portion of the side wall portion 14a and the front portion of the rear wall portion 14b are joined to the tunnel-shaped portion 6a of the dash panel 6, and the flange portion 14c is joined to the upper surface of the front floor panel 8. As a result, a substantially tunnel-like space continuous with the tunnel-shaped portion 6a of the dash panel 6 is formed.

また、キックアップ部９は、図２から図４に示すように、車両前後方向に沿った縦断面における断面形状が、フロントフロアパネル８の後端から車両上方へ向けて延設されたキックアップ前面部分９ａと、キックアップ前面部分９ａの上端から車両後方へ向けて延びるキックアップ上面部分９ｂとで、断面略Ｌ字状に形成されている。 Further, as shown in FIGS. 2 to 4, the kick-up portion 9 has a kick-up in which the cross-sectional shape in the vertical cross section along the vehicle front-rear direction extends from the rear end of the front floor panel 8 toward the upper side of the vehicle. The front surface portion 9a and the kick-up upper surface portion 9b extending from the upper end of the kick-up front surface portion 9a toward the rear of the vehicle are formed in a substantially L-shaped cross section.

このキックアップ部９の下面には、図４に示すように、キックアップ前面部分９ａの上部とキックアップ上面部分９ｂの前部とに跨って、車幅方向に延びる第３クロスメンバ１５が接合されている。この第３クロスメンバ１５は、車両前後方向に沿った縦断面における断面形状が、車両後方下方に角部を有する断面略Ｌ字状であって、キックアップ部９とで、車幅方向に延びる断面略矩形の閉断面をなすように形成されている。 As shown in FIG. 4, a third cross member 15 extending in the vehicle width direction is joined to the lower surface of the kick-up portion 9 so as to straddle the upper portion of the kick-up front surface portion 9a and the front portion of the kick-up upper surface portion 9b. Has been done. The third cross member 15 has a substantially L-shaped cross section having a corner portion at the lower rear side of the vehicle in a vertical cross section along the vehicle front-rear direction, and extends in the vehicle width direction with the kick-up portion 9. The cross section is formed so as to form a substantially rectangular closed cross section.

また、リヤフロアパネル１０は、車両上下方向に厚みを有するパネル部材であって、キックアップ部９のキックアップ上面部分９ｂの後端に接合されている。なお、詳細な図示を省略するが、リヤフロアパネル１０の上面には、後席の座面部分が載置固定されるものとする。 Further, the rear floor panel 10 is a panel member having a thickness in the vertical direction of the vehicle, and is joined to the rear end of the kick-up upper surface portion 9b of the kick-up portion 9. Although detailed illustration is omitted, it is assumed that the seat surface portion of the rear seat is mounted and fixed on the upper surface of the rear floor panel 10.

また、フロアフレームアッパ１１は、図２及び図３に示すように、ダッシュパネル６の下部における車室内側の面と、フロントフロアパネル８の上面とに跨って配設されている。このフロアフレームアッパ１１は、詳細な図示を省略するが、車幅方向に沿った縦断面における断面形状が車両上方に突出した断面略ハット状であって、ダッシュパネル６、及びフロントフロアパネル８に接合されることで、車両前後方向に延びる断面略矩形の閉断面を形成している。 Further, as shown in FIGS. 2 and 3, the floor frame upper 11 is arranged so as to straddle the surface of the lower part of the dash panel 6 on the vehicle interior side and the upper surface of the front floor panel 8. Although detailed illustration of the floor frame upper 11 is omitted, the cross-sectional shape of the vertical cross-section along the vehicle width direction is substantially a hat-like cross section protruding upward of the vehicle, and the dash panel 6 and the front floor panel 8 have a cross-sectional shape. By being joined, a closed cross section having a substantially rectangular cross section extending in the front-rear direction of the vehicle is formed.

なお、フロアフレームアッパ１１は、図３に示すように、平面視において、サイドシル７の近傍をとおるように、車幅方向外側近傍に配設されるとともに、前端に対して後端が車幅方向外側に位置するように配設されている。 As shown in FIG. 3, the floor frame upper 11 is arranged near the outside in the vehicle width direction so as to pass through the vicinity of the side sill 7 in a plan view, and the rear end is in the vehicle width direction with respect to the front end. It is arranged so as to be located on the outside.

また、フロアフレームロア１２は、図３に示すように、平面視において、フロアフレームアッパ１１から連続するように、フロントフロアパネル８の下面に配設されている。
より詳しくは、フロアフレームロア１２は、図３に示すように、前端に対して後端が車幅方向外側に位置するように配設されている。換言すると、フロアフレームロア１２は、左右のサイドシル７の近傍をとおるように配設されている。 Further, as shown in FIG. 3, the floor frame lower 12 is arranged on the lower surface of the front floor panel 8 so as to be continuous with the floor frame upper 11 in a plan view.
More specifically, as shown in FIG. 3, the floor frame lower 12 is arranged so that the rear end is located outside in the vehicle width direction with respect to the front end. In other words, the floor frame lower 12 is arranged so as to pass through the vicinity of the left and right side sills 7.

このフロアフレームロア１２は、図６に示すように、車幅方向に沿った縦断面における断面形状が車両下方に突出した断面略ハット状であって、フロントフロアパネル８の下面に接合されることで、車両前後方向に延びる断面略矩形の閉断面を形成している。 As shown in FIG. 6, the floor frame lower 12 has a substantially hat-shaped cross section in a vertical cross section along the vehicle width direction and protrudes downward from the vehicle, and is joined to the lower surface of the front floor panel 8. Therefore, a closed cross section having a substantially rectangular cross section extending in the front-rear direction of the vehicle is formed.

そして、フロントフロアパネル８の車両下方側におけるフロアフレームロア１２の間には、図３及び図４に示すように、フロントフロアパネル８の前端近傍からリヤフロアパネル１０に至る範囲に、回転電機に電力を供給するバッテリユニット１６が配設されている。 Then, as shown in FIGS. 3 and 4, between the floor frame lowers 12 on the lower side of the vehicle of the front floor panel 8, electric power is supplied to the rotary electric machine in a range from the vicinity of the front end of the front floor panel 8 to the rear floor panel 10. A battery unit 16 for supplying a battery unit 16 is arranged.

また、第１フロアクロスメンバ３０は、図２及び図３に示すように、フロントフロアパネル８における膨出部材１４の後端に対して車両後方側に隣接する位置で、左右のサイドシル７を略直線的に連結している。
この第１フロアクロスメンバ３０は、図４に示すように、車両前後方向に沿った縦断面において、フロントフロアパネル８とで車幅方向に延びる閉断面をなす形状に形成されている。 Further, as shown in FIGS. 2 and 3, the first floor cross member 30 omits the left and right side sills 7 at positions adjacent to the rear end of the bulging member 14 on the front floor panel 8 on the rear side of the vehicle. They are connected in a straight line.
As shown in FIG. 4, the first floor cross member 30 is formed in a shape having a closed cross section extending in the vehicle width direction with the front floor panel 8 in a vertical cross section along the vehicle front-rear direction.

また、第２フロアクロスメンバ４０は、図２及び図３に示すように、第１フロアクロスメンバ３０に対して車両後方に所定間隔を隔てた位置において、左右のサイドシル７を略直線的に連結している。
この第２フロアクロスメンバ４０は、図４に示すように、車両前後方向に沿った縦断面において、フロントフロアパネル８とで車幅方向に延びる閉断面をなす形状に形成されている。 Further, as shown in FIGS. 2 and 3, the second floor cross member 40 connects the left and right side sills 7 substantially linearly at positions separated from the first floor cross member 30 at a predetermined distance behind the vehicle. doing.
As shown in FIG. 4, the second floor cross member 40 is formed in a shape having a closed cross section extending in the vehicle width direction with the front floor panel 8 in a vertical cross section along the vehicle front-rear direction.

さらに、第２フロアクロスメンバ４０は、図６に示すように、車幅方向に沿った縦断面において、車幅方向略中央近傍の上面が、車幅方向外側の上面に対して車両上方に位置するように、車幅方向略中央近傍の断面形状を車両上方に拡大させた上方拡大断面部４０ａを有する形状に形成されている。 Further, as shown in FIG. 6, the second floor cross member 40 has an upper surface near the center in the vehicle width direction located above the vehicle with respect to the outer upper surface in the vehicle width direction in a vertical cross section along the vehicle width direction. As such, it is formed in a shape having an upward enlarged cross-sectional portion 40a in which the cross-sectional shape near the center in the vehicle width direction is enlarged upward in the vehicle.

また、キックアップ補強部材５０は、図２から図４に示すように、車幅方向略中央において、フロントフロアパネル８の後方開口Ｓ２を覆うとともに、キックアップ部９のキックアップ前面部分９ａとフロントフロアパネル８とを連結している。 Further, as shown in FIGS. 2 to 4, the kick-up reinforcing member 50 covers the rear opening S2 of the front floor panel 8 at substantially the center in the vehicle width direction, and the kick-up front portion 9a and the front of the kick-up portion 9 are covered. It is connected to the floor panel 8.

また、コンソール支持ブラケット６０は、図２から図４に示すように、フロントフロアパネル８の膨出部材１４と、キックアップ補強部材５０とを車両前後方向に連結している。
さらに、コンソール支持ブラケット６０は、第１フロアクロスメンバ３０の上面、第２フロアクロスメンバ４０の上面、及び立設ブラケット７０の上面にそれぞれ締結固定されている。 Further, as shown in FIGS. 2 to 4, the console support bracket 60 connects the bulging member 14 of the front floor panel 8 and the kick-up reinforcing member 50 in the front-rear direction of the vehicle.
Further, the console support bracket 60 is fastened and fixed to the upper surface of the first floor cross member 30, the upper surface of the second floor cross member 40, and the upper surface of the upright bracket 70, respectively.

なお、コンソール支持ブラケット６０には、図１、図２、及び図４に示すように、シフトレバー４を支持するシフトレバー支持ブラケット５が載置固定されるとともに、センターコンソール後部３Ｂが載置固定されている。
また、立設ブラケット７０は、図２及び図４に示すように、第１フロアクロスメンバ３０と第２フロアクロスメンバ４０との間において、フロントフロアパネル８の上面と、コンソール支持ブラケット６０の上面とを連結支持している。 As shown in FIGS. 1, 2, and 4, the shift lever support bracket 5 that supports the shift lever 4 is mounted and fixed on the console support bracket 60, and the rear portion 3B of the center console is mounted and fixed. Has been done.
Further, as shown in FIGS. 2 and 4, the erection bracket 70 has an upper surface of the front floor panel 8 and an upper surface of the console support bracket 60 between the first floor cross member 30 and the second floor cross member 40. And are connected and supported.

引き続き、上述した第２フロアクロスメンバ４０、キックアップ補強部材５０、及びコンソール支持ブラケット６０について、さらに詳しく説明する。
第２フロアクロスメンバ４０は、図３及び図６に示すように、フロアフレームロア１２の間を車幅方向に延びる一部材である中央メンバ部材４１と、中央メンバ部材４１の車幅方向両端に接合された左右一対の端部メンバ部材４２と、上方拡大断面部４０ａをなすクロスメンバ補強部材４３とで構成されている。 Subsequently, the above-described second floor cross member 40, kick-up reinforcing member 50, and console support bracket 60 will be described in more detail.
As shown in FIGS. 3 and 6, the second floor cross member 40 includes a central member member 41 which is a member extending in the vehicle width direction between the floor frame lowers 12 and both ends of the center member member 41 in the vehicle width direction. It is composed of a pair of left and right end member members 42 that are joined and a cross member reinforcing member 43 that forms an upward enlarged cross-sectional portion 40a.

中央メンバ部材４１は、端部メンバ部材４２の剛性に対して高剛性な一つの部材で形成されている。この中央メンバ部材４１は、例えば、板厚が１．８ｍｍの超高張力鋼板であって、図７に示すように、車両前後方向に沿った縦断面における断面形状が、車両上方に突出した断面略ハット状に形成されている。 The central member member 41 is formed of one member having high rigidity with respect to the rigidity of the end member member 42. The central member member 41 is, for example, an ultra-high-strength steel plate having a plate thickness of 1.8 mm, and as shown in FIG. 7, the cross-sectional shape in the vertical cross section along the vehicle front-rear direction protrudes upward in the vehicle. It is formed in a substantially hat shape.

具体的には、中央メンバ部材４１は、図６及び図７に示すように、車両前方側の面をなすメンバ前面部４１ａと、車両後方側の面をなすメンバ後面部４１ｂと、車両上方の面をなすメンバ上面部４１ｃと、メンバ前面部４１ａの下端から車両前方に延設した前方フランジ部４１ｄと、メンバ後面部４１ｂの下端から車両後方へ延設した後方フランジ部４１ｅとで一体形成されている。 Specifically, as shown in FIGS. 6 and 7, the central member member 41 includes a member front surface portion 41a forming a surface on the front side of the vehicle, a member rear surface portion 41b forming a surface on the rear side of the vehicle, and an upper portion of the vehicle. A member upper surface portion 41c forming a surface, a front flange portion 41d extending from the lower end of the member front surface portion 41a to the front of the vehicle, and a rear flange portion 41e extending from the lower end of the member rear surface portion 41b to the rear of the vehicle are integrally formed. ing.

この中央メンバ部材４１は、図６及び図７に示すように、前方フランジ部４１ｄ、及び後方フランジ部４１ｅがフロントフロアパネル８の上面に接合されている。
このような中央メンバ部材４１のメンバ上面部４１ｃは、図３及び図６に示すように、平面視略矩形の略平板状であって、サイドシルインナ７Ｂのインナ上面部７ａよりも車両下方の位置に形成されている。 As shown in FIGS. 6 and 7, the central member member 41 has a front flange portion 41d and a rear flange portion 41e joined to the upper surface of the front floor panel 8.
As shown in FIGS. 3 and 6, the member upper surface portion 41c of such a central member member 41 has a substantially flat plate shape having a substantially rectangular shape in a plan view, and is located below the inner upper surface portion 7a of the side sill inner 7B. Is formed in.

一方、左右の端部メンバ部材４２は、中央メンバ部材４１に対して低剛性であって、例えば、板厚が１．０ｍｍの高張力鋼板で構成されている。この端部メンバ部材４２は、車両前後方向に沿った縦断面における断面形状が、車両上方に突出した断面略ハット状であって、中央メンバ部材４１から連続して車幅方向に延びる形状に形成されている。 On the other hand, the left and right end member members 42 are made of a high-tensile steel plate having a low rigidity with respect to the central member member 41 and having a plate thickness of, for example, 1.0 mm. The end member member 42 is formed so that the cross-sectional shape in the vertical cross section along the vehicle front-rear direction is a substantially hat-shaped cross section protruding upward of the vehicle and continuously extends in the vehicle width direction from the central member member 41. Has been done.

具体的には、端部メンバ部材４２は、図３及び図６に示すように、中央メンバ部材４１のメンバ上面部４１ｃに略同じ車両上下方向の位置に位置するメンバ上面部４２ａと、メンバ上面部４２ａの前端から車両下方へ延設されたメンバ前面部４２ｂ（図３参照）と、メンバ上面部４２ａの後端から車両下方へ延設されたメンバ後面部４２ｃと、メンバ前面部４２ｂの下端から車両前方に延設した前方フランジ部と、メンバ後面部４２ｃの下端から車両後方へ延設した後方フランジ部とで一体形成されている。 Specifically, as shown in FIGS. 3 and 6, the end member member 42 has a member upper surface portion 42a located at a position substantially the same as the member upper surface portion 41c of the central member member 41 in the vertical direction of the vehicle, and a member upper surface portion 42a. A member front surface 42b (see FIG. 3) extending downward from the front end of the member 42a, a member rear surface 42c extending downward from the rear end of the member upper surface 42a, and a lower end of the member front surface 42b. The front flange portion extending from the front to the front of the vehicle and the rear flange portion extending from the lower end of the member rear surface portion 42c to the rear of the vehicle are integrally formed.

この端部メンバ部材４２は、前方フランジ部、及び後方フランジ部が、フロントフロアパネル８の上面に接合され、メンバ上面部４２ａ（後述する前席外側固定部分４２ｆ）を車幅方向外側へ延設した延設部分が、サイドシル７のインナ上面部７ａに接合されている。 In this end member member 42, the front flange portion and the rear flange portion are joined to the upper surface of the front floor panel 8, and the member upper surface portion 42a (front seat outer side fixing portion 42f described later) extends outward in the vehicle width direction. The extended portion is joined to the inner upper surface portion 7a of the side sill 7.

このような端部メンバ部材４２のメンバ上面部４２ａは、図３及び図６に示すように、中央メンバ部材４１のメンバ上面部４１ｃにおける車両前後方向の長さに略同じ車両前後方向の長さを有する平面視略矩形の略平板状に形成されている。 As shown in FIGS. 3 and 6, the member upper surface portion 42a of the end member member 42 has a length in the vehicle front-rear direction that is substantially the same as the length of the member upper surface portion 41c of the central member member 41 in the vehicle front-rear direction. It is formed in a substantially flat plate shape having a substantially rectangular shape in a plan view.

さらに、メンバ上面部４２ａの車幅方向外側には、図３及び図６に示すように、車幅方向外側のシートスライドレール１７が締結固定される前席外側固定部分４２ｆが、車両上方に膨出させて一体形成されている。 Further, on the outer side of the upper surface portion 42a of the member in the vehicle width direction, as shown in FIGS. 3 and 6, a front seat outer side fixing portion 42f to which the seat slide rail 17 on the outer side in the vehicle width direction is fastened and fixed bulges upward in the vehicle. It is made to be put out and integrally formed.

上述したような構成のため、第２フロアクロスメンバ４０には、中央メンバ部材４１におけるメンバ前面部４１ａとメンバ上面部４１ｃとの角部、及び端部メンバ部材４２におけるメンバ上面部４２ａとメンバ前面部４２ｂとの角部によって、平面視、及び正面視において、車幅方向へ略一直線状に延びる稜線が車両前方側に形成されている。 Due to the above-described configuration, the second floor cross member 40 includes a corner portion between the member front surface portion 41a and the member upper surface portion 41c in the central member member 41, and a member upper surface portion 42a and the member front surface in the end member member 42. A ridge line extending substantially linearly in the vehicle width direction is formed on the front side of the vehicle in the plan view and the front view by the corner portion with the portion 42b.

さらに、第２フロアクロスメンバ４０には、中央メンバ部材４１におけるメンバ後面部４１ｂとメンバ上面部４１ｃとの角部、及び端部メンバ部材４２におけるメンバ上面部４２ａとメンバ後面部４２ｃとの角部によって、平面視、及び背面視において、車幅方向へ略一直線状に延びる稜線が車両後方側に形成されている。 Further, the second floor cross member 40 has a corner portion between the member rear surface portion 41b and the member upper surface portion 41c in the central member member 41, and a corner portion between the member upper surface portion 42a and the member rear surface portion 42c in the end member member 42. Therefore, in the plan view and the rear view, a ridge line extending substantially linearly in the vehicle width direction is formed on the rear side of the vehicle.

また、クロスメンバ補強部材４３は、図６及び図７に示すように、車両前後方向に沿った縦断面における断面形状が、車両上方に突出した断面略ハット状に形成され、中央メンバ部材４１とで車幅方向に延びる閉断面をなす形状に形成されている。 Further, as shown in FIGS. 6 and 7, the cross member reinforcing member 43 has a cross-sectional shape in a vertical cross section along the vehicle front-rear direction, which is formed in a substantially hat-like cross section protruding upward of the vehicle, and is formed with the central member member 41. It is formed in a shape having a closed cross section extending in the vehicle width direction.

具体的には、クロスメンバ補強部材４３は、図６及び図７に示すように、中央メンバ部材４１のメンバ上面部４１ｃよりも車両上方に位置する上面部４３ａと、上面部４３ａの前端から車両下方へ延設された前面部４３ｂと、上面部４３ａの後端から車両下方へ延設された後面部４３ｃと、上面部４３ａにおける車幅方向の両端から車両下方へ延設された左右一対の側面部４３ｄと、前面部４３ｂの下端から車両前方に延設された前方フランジ部４３ｅと、後面部４３ｃの下端から車両後方に延設された後方フランジ部４３ｆとで一体形成されている。 Specifically, as shown in FIGS. 6 and 7, the cross member reinforcing member 43 has an upper surface portion 43a located above the member upper surface portion 41c of the central member member 41 and a vehicle from the front end of the upper surface portion 43a. A pair of left and right front portions 43b extending downward, a rear surface portion 43c extending downward from the rear end of the upper surface portion 43a, and a pair of left and right portions extending downward from both ends of the upper surface portion 43a in the vehicle width direction. The side surface portion 43d, the front flange portion 43e extending from the lower end of the front surface portion 43b to the front of the vehicle, and the rear flange portion 43f extending from the lower end of the rear surface portion 43c to the rear of the vehicle are integrally formed.

さらに、クロスメンバ補強部材４３は、図６に示すように、車幅方向に沿った縦断面における断面形状が断面ハット状をなすとともに、中央メンバ部材４１のメンバ上面部４１ｃとで閉断面をなすように、側面部４３ｄの下端から車幅方向外側へ延設された左右一対の側方フランジ部４３ｇが一体形成されている。 Further, as shown in FIG. 6, the cross member reinforcing member 43 has a cross-sectional shape in a vertical cross section along the vehicle width direction having a cross-sectional hat shape, and has a closed cross section with the member upper surface portion 41c of the central member member 41. As described above, a pair of left and right side flange portions 43g extending outward in the vehicle width direction from the lower end of the side surface portion 43d are integrally formed.

そして、クロスメンバ補強部材４３は、図６及び図７に示すように、前方フランジ部４３ｅが中央メンバ部材４１の前方フランジ部４１ｄを介して、フロントフロアパネル８の上面に接合され、後方フランジ部４３ｆが中央メンバ部材４１の後方フランジ部４１ｅを介して、フロントフロアパネル８の上面に接合され、側方フランジ部４３ｇが中央メンバ部材４１のメンバ上面部４１ｃに接合されている。 Then, as shown in FIGS. 6 and 7, in the cross member reinforcing member 43, the front flange portion 43e is joined to the upper surface of the front floor panel 8 via the front flange portion 41d of the central member member 41, and the rear flange portion is formed. The 43f is joined to the upper surface of the front floor panel 8 via the rear flange portion 41e of the central member member 41, and the side flange portion 43g is joined to the member upper surface portion 41c of the central member member 41.

このようなクロスメンバ補強部材４３の上面部４３ａ、及び側面部４３ｄは、図３、図６、及び図７に示すように、中央メンバ部材４１のメンバ上面部４１ｃに略同じ車両前後方向の長さを有する平面視略矩形に形成されている。 As shown in FIGS. 3, 6, and 7, the upper surface portion 43a and the side surface portion 43d of the cross member reinforcing member 43 have substantially the same length in the vehicle front-rear direction as the member upper surface portion 41c of the central member member 41. It is formed into a substantially rectangular shape in a plan view having dimensions.

さらに、上面部４３ａにおける車幅方向両端には、図６に示すように、車幅方向内側のシートスライドレール１７の後部が締結固定される前席内側固定部４３ｈが、上面部４３ａにおける車幅方向略中央部分と略同じ車両上下方向の位置に一体形成されている。 Further, as shown in FIG. 6, front seat inner fixing portions 43h on which the rear portion of the seat slide rail 17 on the inner side in the vehicle width direction is fastened and fixed are provided at both ends of the upper surface portion 43a in the vehicle width direction. It is integrally formed at a position in the vertical direction of the vehicle, which is substantially the same as the central portion of the direction.

加えて、上面部４３ａの下面には、図６に示すように、前席内側固定部４３ｈよりも車幅方向内側において、締結ボルトＴ１が螺合する２つのウエルドナット４４が、車幅方向に所定間隔を隔てて接合されている。このウエルドナット４４には、図６に示すように、コンソール支持ブラケット６０（後述する第２支持ブラケット６２の第２固定部分６７３ｂ）が、締結ボルトＴ１を介して締結固定される。 In addition, on the lower surface of the upper surface portion 43a, as shown in FIG. 6, two weld nuts 44 into which the fastening bolt T1 is screwed are provided in the vehicle width direction inside the front seat inner side fixing portion 43h in the vehicle width direction. They are joined at a predetermined interval. As shown in FIG. 6, the console support bracket 60 (the second fixing portion 673b of the second support bracket 62 described later) is fastened and fixed to the weld nut 44 via the fastening bolt T1.

また、キックアップ補強部材５０は、図７及び図８に示すように、キックアップ部９のキックアップ前面部分９ａ、及びその車両前方下方のフロントフロアパネル８の上面に接合された本体部材５１と、本体部材５１の上面に着脱自在に設けたカバー部材５２とで構成されている。 Further, as shown in FIGS. 7 and 8, the kick-up reinforcing member 50 is joined to the kick-up front surface portion 9a of the kick-up portion 9 and the main body member 51 joined to the upper surface of the front floor panel 8 below the front of the vehicle. , It is composed of a cover member 52 detachably provided on the upper surface of the main body member 51.

本体部材５１は、図８から図９に示すように、車両前後方向に沿った縦断面における断面形状が断面略Ｌ字状で、かつ車幅方向に沿った縦断面における断面形状が車両上方へ突出した断面略ハット状に形成されている。換言すると、本体部材５１は、車両下方、及び車両後方が開口した略ボックス状に形成されている。 As shown in FIGS. 8 to 9, the main body member 51 has a substantially L-shaped cross section in the vertical cross section along the vehicle front-rear direction, and the cross-sectional shape in the vertical cross section along the vehicle width direction is upward in the vehicle. It is formed in a substantially hat-like cross section with a protruding cross section. In other words, the main body member 51 is formed in a substantially box shape in which the lower part of the vehicle and the rear part of the vehicle are open.

より詳しくは、本体部材５１は、図８から図９に示すように、キックアップ部９におけるキックアップ前面部分９ａの下端に略同じ車両上下方向の位置に形成された上面部５１ａと、上面部５１ａの車幅方向両端から車両下方へ延設した左右一対の側壁部５１ｂと、上面部５１ａの前端から車両下方へ延設した前壁部５１ｃとで、フロントフロアパネル８の後方開口Ｓ２を覆う略ボック状に一体形成されている。 More specifically, as shown in FIGS. 8 to 9, the main body member 51 includes an upper surface portion 51a formed at substantially the same vertical position of the vehicle at the lower end of the kick-up front surface portion 9a in the kick-up portion 9, and an upper surface portion. A pair of left and right side wall portions 51b extending downward from both ends of the 51a in the vehicle width direction and a front wall portion 51c extending downward from the front end of the upper surface portion 51a cover the rear opening S2 of the front floor panel 8. It is integrally formed in a substantially box shape.

さらに、本体部材５１には、側壁部５１ｂの下端を車幅方向外側へフランジ状に延設した部分と、前壁部５１ｃの下端を車両前方へフランジ状に延設した部分とで、左右の側壁部５１ｂの下端、及び前壁部５１ｃの下端に沿った平面視略Ｕ字状のフランジ部５１ｄが一体形成されている。 Further, the main body member 51 includes a portion in which the lower end of the side wall portion 51b is extended outward in the vehicle width direction in a flange shape and a portion in which the lower end of the front wall portion 51c is extended in a flange shape in the front of the vehicle. A flange portion 51d having a substantially U-shape in a plan view is integrally formed along the lower end of the side wall portion 51b and the lower end of the front wall portion 51c.

そして、本体部材５１は、上面部５１ａ、及び左右の側壁部５１ｂがキックアップ部９のキックアップ前面部分９ａに接合され、フランジ部５１ｄがフロントフロアパネル８の上面に接合されている。 Then, in the main body member 51, the upper surface portion 51a and the left and right side wall portions 51b are joined to the kick-up front surface portion 9a of the kick-up portion 9, and the flange portion 51d is joined to the upper surface of the front floor panel 8.

このような本体部材５１の側壁部５１ｂには、図８及び図９に示すように、車両前方、かつ車両上方の位置に設けた開口を介して、締結ボルトＴ２が螺合するウエルドナット５３が内面に接合されている。このウエルドナット５３には、コンソール支持ブラケット６０の後部が、締結ボルトＴ２を介して締結固定される。 As shown in FIGS. 8 and 9, a weld nut 53 into which the fastening bolt T2 is screwed is provided on the side wall portion 51b of the main body member 51 through an opening provided at a position in front of the vehicle and above the vehicle. It is joined to the inner surface. The rear portion of the console support bracket 60 is fastened and fixed to the weld nut 53 via the fastening bolt T2.

また、上面部５１ａには、図７に示すように、フロントフロアパネル８の後方開口Ｓ２に対向する部分を、平面視略矩形に開口した開口部Ｓ３が開口形成されている。
さらに、上面部５１ａには、図８及び図９に示すように、開口部Ｓ３の周囲に車両上方に突出したウエルドボルト５４が４つ接合されている。このウエルドボルト５４には、コンソール支持ブラケット６０の後部、及びカバー部材５２が共締めされる。 Further, as shown in FIG. 7, an opening S3 is formed in the upper surface portion 51a so as to open a portion of the front floor panel 8 facing the rear opening S2 in a substantially rectangular shape in a plan view.
Further, as shown in FIGS. 8 and 9, four weld bolts 54 projecting upward from the vehicle are joined to the upper surface portion 51a around the opening S3. The rear portion of the console support bracket 60 and the cover member 52 are jointly fastened to the weld bolt 54.

一方、カバー部材５２は、図７及び図８に示すように、車両上下方向に所定の厚みを有するとともに、本体部材５１の開口部Ｓ３を覆う略平板状に形成されている。このカバー部材５２は、図７及び図９に示すように、コンソール支持ブラケット６０の後部を挟んで、本体部材５１のウエルドボルト５４に共締めされている。 On the other hand, as shown in FIGS. 7 and 8, the cover member 52 has a predetermined thickness in the vertical direction of the vehicle and is formed in a substantially flat plate shape covering the opening S3 of the main body member 51. As shown in FIGS. 7 and 9, the cover member 52 is fastened together with the weld bolt 54 of the main body member 51 with the rear portion of the console support bracket 60 interposed therebetween.

また、コンソール支持ブラケット６０は、図２及び図３に示すように、フロントフロアパネル８の膨出部材１４と、キックアップ補強部材５０とを車両前後方向に連結している。このコンソール支持ブラケット６０は、図１から図４に示すように、電動車両１の車室内において、センターコンソール前部３Ａを支持する第１支持ブラケット６１と、シフトレバー４、及びセンターコンソール後部３Ｂを支持する第２支持ブラケット６２とで構成されている。 Further, as shown in FIGS. 2 and 3, the console support bracket 60 connects the bulging member 14 of the front floor panel 8 and the kick-up reinforcing member 50 in the front-rear direction of the vehicle. As shown in FIGS. 1 to 4, the console support bracket 60 includes a first support bracket 61 that supports the center console front portion 3A, a shift lever 4, and a center console rear portion 3B in the passenger compartment of the electric vehicle 1. It is composed of a second support bracket 62 that supports it.

第１支持ブラケット６１は、図５に示すように、フロントフロアパネル８の膨出部材１４に接合されるブラケット本体６３と、ブラケット本体６３の後部を補強する後部レインフォースメント６４とで構成されている。
なお、第１支持ブラケット６１は、図４及び図５に示すように、フロントフロアパネル８の膨出部材１４における車両前後方向の長さに略同じ車両前後方向の長さで形成されている。 As shown in FIG. 5, the first support bracket 61 includes a bracket main body 63 joined to the bulging member 14 of the front floor panel 8 and a rear reinforcement 64 for reinforcing the rear portion of the bracket main body 63. There is.
As shown in FIGS. 4 and 5, the first support bracket 61 is formed to have substantially the same length in the vehicle front-rear direction as the length of the bulging member 14 of the front floor panel 8 in the vehicle front-rear direction.

具体的には、ブラケット本体６３は、図５及び図１０に示すように、車幅方向で対面する左右一対のブラケット側壁部６３１と、ブラケット側壁部６３１の上端を連結するブラケット上面部６３２とで、正面視略門型形状に形成されている。 Specifically, as shown in FIGS. 5 and 10, the bracket main body 63 includes a pair of left and right bracket side wall portions 631 facing each other in the vehicle width direction, and a bracket upper surface portion 632 that connects the upper ends of the bracket side wall portions 631. , It is formed in the shape of a front view gate.

ブラケット上面部６３２は、図５及び図１０に示すように、車両下方に凹設されるとともに、車両前後方向に延びる略凹溝状の凹溝部６３２ａを、車幅方向略中央近傍に有する形状に形成されている。この凹溝部６３２ａは、ブラケット上面部６３２における車両前後方向の略中央近傍から後端にかけて凹設されている。 As shown in FIGS. 5 and 10, the bracket upper surface portion 632 is recessed below the vehicle and has a substantially concave groove-shaped concave groove portion 632a extending in the front-rear direction of the vehicle in the vicinity of substantially the center in the vehicle width direction. It is formed. The concave groove portion 632a is recessed in the upper surface portion 632 of the bracket from substantially the vicinity of the center in the vehicle front-rear direction to the rear end.

なお、ブラケット本体６３は、図４に示すように、車両前後方向に沿った縦断面において、後述する後部レインフォースメント６４よりも車両前方で、膨出部材１４の後壁部１４ｂに対して離間した位置のブラケット上面部６３２が、断面略Ｚ字状の連結ブラケット１９を介して、膨出部材１４の後壁部１４ｂに連結されている。 As shown in FIG. 4, the bracket main body 63 is separated from the rear wall portion 14b of the bulging member 14 in front of the rear reinforcement 64 described later in the vertical cross section along the vehicle front-rear direction. The upper surface portion 632 of the bracket at this position is connected to the rear wall portion 14b of the bulging member 14 via the connecting bracket 19 having a substantially Z-shaped cross section.

一方、第１支持ブラケット６１の後部レインフォースメント６４は、図５に示すように、ブラケット本体６３の後部における内面に接合されている。この後部レインフォースメント６４は、図５及び図１０に示すように、ブラケット本体６３のブラケット側壁部６３１の上部に接合された左右一対の側面部６４１と、ブラケット本体６３のブラケット上面部６３２に接合された上面部６４２とで一体形成されている。 On the other hand, the rear reinforcement 64 of the first support bracket 61 is joined to the inner surface of the rear portion of the bracket main body 63 as shown in FIG. As shown in FIGS. 5 and 10, the rear reinforcement 64 is joined to a pair of left and right side surface portions 641 joined to the upper portion of the bracket side wall portion 631 of the bracket body 63 and to the bracket upper surface portion 632 of the bracket body 63. It is integrally formed with the formed upper surface portion 642.

このような後部レインフォースメント６４における側面部６４１の後部には、図５及び図１０に示すように、ブラケット本体６３のブラケット側壁部６３１に設けた開口を介して、締結ボルトＴ３が螺合するウエルドナット６５が溶接されている。このウエルドナット６５には、第２支持ブラケット６２の前部が、締結ボルトＴ３を介して締結固定される。 As shown in FIGS. 5 and 10, a fastening bolt T3 is screwed into the rear portion of the side surface portion 641 of the rear reinforcement 64 through an opening provided in the bracket side wall portion 631 of the bracket main body 63. The weld nut 65 is welded. The front portion of the second support bracket 62 is fastened and fixed to the weld nut 65 via the fastening bolt T3.

さらに、上面部６４２の後部には、図５及び図１０に示すように、ブラケット本体６３のブラケット上面部６３２に設けた開口を介して、車両上方に突出するウエルドボルト６６が、車幅方向に所定間隔を隔てて接合されている。このウエルドボルト６６には、第２支持ブラケット６２の前部が締結固定される。 Further, at the rear portion of the upper surface portion 642, as shown in FIGS. 5 and 10, a weld bolt 66 projecting upward in the vehicle through an opening provided in the bracket upper surface portion 632 of the bracket main body 63 is provided in the vehicle width direction. They are joined at a predetermined interval. The front portion of the second support bracket 62 is fastened and fixed to the weld bolt 66.

また、第２支持ブラケット６２は、図１１に示すように、第１支持ブラケット６１の後部に連結されるブラケット本体６７と、ブラケット本体６７の前部を補強する前部レインフォースメント６８とで構成されている。 Further, as shown in FIG. 11, the second support bracket 62 includes a bracket body 67 connected to the rear portion of the first support bracket 61 and a front reinforcement 68 for reinforcing the front portion of the bracket body 67. Has been done.

ブラケット本体６７は、図９から図１１に示すように、車幅方向に沿った縦断面における断面形状が、車両下方が開口した断面略門型形状であって、車幅方向で対面する左右一対のブラケット側壁部６７１と、ブラケット側壁部６７１の上端を車幅方向に連結するブラケット上面部６７２とで一体形成されている。 As shown in FIGS. 9 to 11, the bracket main body 67 has a cross-sectional shape in a vertical cross section along the vehicle width direction, which is a substantially gate-shaped cross section with an opening below the vehicle width, and a pair of left and right brackets facing each other in the vehicle width direction. The bracket side wall portion 671 and the bracket upper surface portion 672 that connect the upper ends of the bracket side wall portions 671 in the vehicle width direction are integrally formed.

左右のブラケット側壁部６７１は、図１１に示すように、車両上下方向の長さに対して車両前後方向の長さが長い略平板状に形成されている。なお、ブラケット側壁部６７１は、ブラケット上面部６７２からフロントフロアパネル８の上面に至る車両上下方向の長さよりも短い車両上下方向の長さで形成されている。 As shown in FIG. 11, the left and right bracket side wall portions 671 are formed in a substantially flat plate shape in which the length in the vehicle front-rear direction is longer than the length in the vehicle vertical direction. The bracket side wall portion 671 is formed to have a length in the vehicle vertical direction shorter than the length in the vehicle vertical direction from the bracket upper surface portion 672 to the upper surface of the front floor panel 8.

さらに、ブラケット側壁部６７１の下端には、図１１に示すように、前端から後端にかけて、車幅方向外側に延設されたフランジ部６７３が一体形成されている。
このフランジ部６７３には、車両前後方向に所定間隔を隔てた位置において、第１フロアクロスメンバ３０の上面に締結固定される第１固定部分６７３ａと、第２フロアクロスメンバ４０の上面に締結固定される第２固定部分６７３ｂとが、さらにフランジ部として車幅方向外側に向けて延設されている。 Further, as shown in FIG. 11, a flange portion 673 extending outward in the vehicle width direction is integrally formed at the lower end of the bracket side wall portion 671 from the front end to the rear end.
The flange portion 673 has a first fixing portion 673a fastened and fixed to the upper surface of the first floor cross member 30 and fastened and fixed to the upper surface of the second floor cross member 40 at positions spaced apart from each other in the vehicle front-rear direction. The second fixed portion 673b to be formed is further extended as a flange portion toward the outside in the vehicle width direction.

このようなブラケット側壁部６７１には、図９から図１１に示すように、締結ボルトＴ３の挿通を許容するボルト挿通孔６７１ａが、前端近傍に開口形成され、締結ボルトＴ２の挿通を許容するボルト挿通孔６７１ｂが、後端近傍に開口形成されている。 As shown in FIGS. 9 to 11, a bolt insertion hole 671a for allowing the fastening bolt T3 to be inserted is formed in the bracket side wall portion 671 in the vicinity of the front end, and the fastening bolt T2 is allowed to be inserted. An insertion hole 671b is formed in the vicinity of the rear end.

また、ブラケット本体６７のブラケット上面部６７２は、図２から図４に示すように、その前部において、シフトレバー４を車両下方から支持するシフトレバー支持ブラケット５と、センターコンソール後部３Ｂとが、車両前方からこの順番で載置固定されている。 Further, as shown in FIGS. 2 to 4, the bracket upper surface portion 672 of the bracket main body 67 has a shift lever support bracket 5 for supporting the shift lever 4 from below the vehicle and a center console rear portion 3B at the front portion thereof. It is placed and fixed in this order from the front of the vehicle.

このブラケット上面部６７２は、図３及び図１１に示すように、車幅方向の長さが略一定で車両前後方向に長い平面視略矩形の平板状に形成されている。
このため、第２支持ブラケット６２のブラケット本体６７には、ブラケット側壁部６７１とブラケット上面部６７２との角部、及びブラケット側壁部６７１とフランジ部６７３との角部に、少なくとも平面視において、車両前後方向へ略一直線状に延びる稜線が形成されている。 As shown in FIGS. 3 and 11, the bracket upper surface portion 672 is formed in a flat plate shape having a substantially constant length in the vehicle width direction and a length in the vehicle front-rear direction.
Therefore, the bracket body 67 of the second support bracket 62 has a corner portion between the bracket side wall portion 671 and the bracket upper surface portion 672 and a corner portion between the bracket side wall portion 671 and the flange portion 673, at least in a plan view. A ridgeline extending in a substantially straight line in the front-rear direction is formed.

さらに、ブラケット上面部６７２は、図１０及び図１１に示すように、第１支持ブラケット６１の凹溝部６３２ａに連続するように、車両下方に凹設されるとともに、車両前後方向に延びる凹溝部６７２ａが、車幅方向略中央近傍に形成されている。 Further, as shown in FIGS. 10 and 11, the bracket upper surface portion 672 is recessed in the lower part of the vehicle so as to be continuous with the concave groove portion 632a of the first support bracket 61, and the concave groove portion 672a extending in the front-rear direction of the vehicle. However, it is formed in the vicinity of the center in the vehicle width direction.

このブラケット上面部６７２の凹溝部６７２ａは、図３及び図１１に示すように、ブラケット上面部６７２の前端から第２固定部分６７３ｂ近傍に至る車両前後方向の長さで凹設されている。
なお、第１支持ブラケット６１の凹溝部６３２ａ、及び第２支持ブラケット６２の凹溝部６７２ａは、第１支持ブラケット６１、及び第２支持ブラケット６２の剛性を向上させるだけでなく、車室内を車両前後方向に沿って配索されるワイヤーハーネス（図示省略）を収容する収容空間として形成されている。 As shown in FIGS. 3 and 11, the concave groove portion 672a of the bracket upper surface portion 672 is recessed with a length in the vehicle front-rear direction from the front end of the bracket upper surface portion 672 to the vicinity of the second fixed portion 673b.
The concave groove portion 632a of the first support bracket 61 and the concave groove portion 672a of the second support bracket 62 not only improve the rigidity of the first support bracket 61 and the second support bracket 62, but also improve the rigidity of the first support bracket 61 and the second support bracket 62. It is formed as a storage space for accommodating a wire harness (not shown) that is arranged along the direction.

このようなブラケット上面部６７２には、図１０、及び図１１に示すように、第１支持ブラケット６１のウエルドボルト６６の挿通を許容する２つのボルト挿通孔６７２ｂが、前端近傍に開口形成され、第１フロアクロスメンバ３０のウエルドボルト（図示省略）の挿通を許容する２つのボルト挿通孔６７２ｃが、第１固定部分６７３ａに略同じ車両前後方向の位置に開口形成されている。 As shown in FIGS. 10 and 11, two bolt insertion holes 672b that allow the insertion of the weld bolt 66 of the first support bracket 61 are formed in such a bracket upper surface portion 672 with openings near the front end. Two bolt insertion holes 672c that allow insertion of weld bolts (not shown) of the first floor cross member 30 are formed in the first fixed portion 673a at substantially the same positions in the vehicle front-rear direction.

さらに、ブラケット上面部６７２には、図９から図１１に示すように、立設ブラケット７０への締結固定のために立設ブラケット７０に設けたウエルドボルト（図示省略）の挿通を許容する複数のボルト挿通孔６７２ｄが、第１固定部分６７３ａと第２固定部分６７３ｂとの間に開口形成され、キックアップ補強部材５０の４つのウエルドボルト５４のうち、車両前方側の２つのウエルドボルト５４の挿通を許容する２つのボルト挿通孔６７２ｅが、後端近傍に開口形成されている。 Further, as shown in FIGS. 9 to 11, a plurality of weld bolts (not shown) provided in the erection bracket 70 for fastening and fixing to the erection bracket 70 are allowed to be inserted into the bracket upper surface portion 672. A bolt insertion hole 672d is formed between the first fixing portion 673a and the second fixing portion 673b, and of the four weld bolts 54 of the kick-up reinforcing member 50, two weld bolts 54 on the front side of the vehicle are inserted. Two bolt insertion holes 672e that allow the above are formed in the vicinity of the rear end.

第２支持ブラケット６２の前部レインフォースメント６８は、図１０及び図１１に示すように、ブラケット本体６７の前部における内面に接合されている。この前部レインフォースメント６８は、図１０及び図１１に示すように、ブラケット本体６７のブラケット側壁部６７１に接合された左右一対の側面部６８１と、ブラケット本体６７のブラケット上面部６７２に接合された上面部６８２とで、正面視略門型形状に一体形成されている。 The front reinforcement 68 of the second support bracket 62 is joined to the inner surface of the front portion of the bracket body 67 as shown in FIGS. 10 and 11. As shown in FIGS. 10 and 11, the front reinforcement 68 is joined to a pair of left and right side surface portions 681 joined to the bracket side wall portion 671 of the bracket body 67 and to the bracket upper surface portion 672 of the bracket body 67. It is integrally formed with the upper surface portion 682 in a front view substantially gate shape.

上述した構成のコンソール支持ブラケット６０は、図１０に示すように、第１支持ブラケット６１のブラケット側壁部６３１の後部と第２支持ブラケット６２のブラケット側壁部６７１の前部が、締結ボルトＴ３を介して締結固定されるとともに、第１支持ブラケット６１のブラケット上面部６３２の後部と第２支持ブラケット６２のブラケット上面部６７２の前部とが、ウエルドボルト６６を介して締結固定されることで、第１支持ブラケット６１と第２支持ブラケット６２とを車両前後方向に連結している。 In the console support bracket 60 having the above-described configuration, as shown in FIG. 10, the rear portion of the bracket side wall portion 631 of the first support bracket 61 and the front portion of the bracket side wall portion 671 of the second support bracket 62 are interposed via a fastening bolt T3. The rear portion of the bracket upper surface portion 632 of the first support bracket 61 and the front portion of the bracket upper surface portion 672 of the second support bracket 62 are fastened and fixed via the weld bolt 66. The 1 support bracket 61 and the 2nd support bracket 62 are connected in the front-rear direction of the vehicle.

さらに、コンソール支持ブラケット６０は、第１支持ブラケット６１のブラケット側壁部６３１、及びブラケット上面部６３２が、それぞれ膨出部材１４の側壁部１４ａ、及び後壁部１４ｂに接合されることで、膨出部材１４に連結されている。 Further, the console support bracket 60 is bulged by joining the bracket side wall portion 631 of the first support bracket 61 and the bracket upper surface portion 632 to the side wall portion 14a and the rear wall portion 14b of the bulging member 14, respectively. It is connected to the member 14.

加えて、コンソール支持ブラケット６０は、図９に示すように、第２支持ブラケット６２のブラケット側壁部６７１が、締結ボルトＴ２を介してキックアップ補強部材５０の側壁部５１ｂに締結固定され、第２支持ブラケット６２のブラケット上面部６７２が、ウエルドボルト５４を介して、キックアップ補強部材５０の上面部５１ａにカバー部材５２とともに共締めされている。 In addition, as shown in FIG. 9, in the console support bracket 60, the bracket side wall portion 671 of the second support bracket 62 is fastened and fixed to the side wall portion 51b of the kick-up reinforcing member 50 via the fastening bolt T2, and the second support bracket 60 is second. The bracket upper surface portion 672 of the support bracket 62 is fastened together with the cover member 52 to the upper surface portion 51a of the kickup reinforcing member 50 via the weld bolt 54.

これにより、コンソール支持ブラケット６０は、フロントフロアパネル８の膨出部材１４とキックアップ補強部材５０とを車両前後方向に連結している。
さらに、コンソール支持ブラケット６０は、第２支持ブラケット６２のブラケット上面部６７２が、ウエルドボルト（図示省略）を介して、第１フロアクロスメンバ３０の上面に、シフトレバー支持ブラケット５の前部とともに共締めされている。 As a result, the console support bracket 60 connects the bulging member 14 of the front floor panel 8 and the kick-up reinforcing member 50 in the front-rear direction of the vehicle.
Further, in the console support bracket 60, the bracket upper surface portion 672 of the second support bracket 62 is provided on the upper surface of the first floor cross member 30 via a weld bolt (not shown) together with the front portion of the shift lever support bracket 5. It is tightened.

そして、コンソール支持ブラケット６０は、図２、図３、及び図６に示すように、第２支持ブラケット６２の第１固定部分６７３ａが、第１フロアクロスメンバ３０の上面に締結固定され、第２支持ブラケット６２の第２固定部分６７３ｂが、締結ボルトＴ１を介して、第２フロアクロスメンバ４０のクロスメンバ補強部材４３に締結固定されている。 Then, as shown in FIGS. 2, 3, and 6, in the console support bracket 60, the first fixing portion 673a of the second support bracket 62 is fastened and fixed to the upper surface of the first floor cross member 30, and the second support bracket 60 is second. The second fixing portion 673b of the support bracket 62 is fastened and fixed to the cross member reinforcing member 43 of the second floor cross member 40 via the fastening bolt T1.

以上のように、回転電機の出力を駆動力とする電動車両１の下部車体構造は、車両前後方向に延びる左右一対のサイドシル７と、サイドシル７の間に配設された略平坦なフロントフロアパネル８と、乗員が着席する前席１８と後席との間におけるフロントフロアパネル８の上面に配設されるとともに、フロントフロアパネル８からサイドシル７のインナ上面部７ａまでの高さよりも低い高さで、左右のサイドシル７を車幅方向に連結する第２フロアクロスメンバ４０とを備え、第２フロアクロスメンバ４０が、車幅方向に沿った縦断面において、車幅方向端部近傍の上面に対して車両上方に上面部４３ａが位置するように、車幅方向略中央近傍の断面形状を車両上方に拡大させた上方拡大断面部４０ａを備えたことにより、乗員の足元空間と、所望される側突性能とを両立して確保することができる。 As described above, the lower body structure of the electric vehicle 1 whose driving force is the output of the rotary electric machine consists of a pair of left and right side sills 7 extending in the front-rear direction of the vehicle and a substantially flat front floor panel arranged between the side sills 7. The height is lower than the height from the front floor panel 8 to the inner upper surface portion 7a of the side sill 7 while being arranged on the upper surface of the front floor panel 8 between the front seat 18 and the rear seat where the occupants are seated. A second floor cross member 40 that connects the left and right side sills 7 in the vehicle width direction is provided, and the second floor cross member 40 is placed on the upper surface near the end portion in the vehicle width direction in a vertical cross section along the vehicle width direction. On the other hand, by providing the upward enlarged cross-sectional portion 40a in which the cross-sectional shape near the center in the vehicle width direction is enlarged upward in the vehicle width direction so that the upper surface portion 43a is located above the vehicle, the space under the feet of the occupant is desired. It is possible to secure both side collision performance.

具体的には、前席１８と後席との間に配設された第２フロアクロスメンバ４０を、フロントフロアパネル８からサイドシル７のインナ上面部７ａまでの高さよりも低い高さとしたことにより、電動車両１の下部車体構造は、フロントフロアパネル８からサイドシル７のインナ上面部７ａまでの高さと略同じ高さの第２フロアクロスメンバ４０に比べて、後席に着席する乗員の足元空間を広く確保することができる。 Specifically, the height of the second floor cross member 40 arranged between the front seat 18 and the rear seat is set to be lower than the height from the front floor panel 8 to the inner upper surface portion 7a of the side sill 7. The lower body structure of the electric vehicle 1 has a foot space for occupants seated in the rear seats as compared with the second floor cross member 40 having a height substantially the same as the height from the front floor panel 8 to the inner upper surface 7a of the side sill 7. Can be widely secured.

さらに、第２フロアクロスメンバ４０が上方拡大断面部４０ａを備えたことにより、電動車両１の下部車体構造は、車幅方向に長い第２フロアクロスメンバ４０における車幅方向略中央近傍の剛性を向上することができる。
これにより、電動車両１の下部車体構造は、車両側方からの衝突荷重に対する車室床面の剛性を向上することができる。 Further, since the second floor cross member 40 is provided with the upward enlarged cross-sectional portion 40a, the lower body structure of the electric vehicle 1 has rigidity in the vicinity of the center substantially in the vehicle width direction of the second floor cross member 40 which is long in the vehicle width direction. Can be improved.
As a result, the lower body structure of the electric vehicle 1 can improve the rigidity of the vehicle interior floor surface against a collision load from the vehicle side.

このため、電動車両１の下部車体構造は、車両側方からの側突荷重が加わった際、例えば、フロントフロアパネル８が車幅方向略中央で座屈変形する、あるいは折れ曲がり変形することを抑制できる。
従って、電動車両１の下部車体構造は、乗員の足元空間と、所望される側突性能とを両立して確保することができる。 Therefore, the lower body structure of the electric vehicle 1 suppresses buckling deformation or bending deformation of the front floor panel 8 substantially at the center in the vehicle width direction when a lateral thrust load from the vehicle side is applied. it can.
Therefore, the lower body structure of the electric vehicle 1 can secure both the foot space of the occupant and the desired lateral collision performance.

また、第２フロアクロスメンバ４０が、左右のサイドシル７を連結するとともに、フロントフロアパネル８とで車幅方向に延びる閉断面をなすクロスメンバ本体（中央メンバ部材４１、端部メンバ部材４２）と、クロスメンバ本体（中央メンバ部材４１、端部メンバ部材４２）に固定されるとともに、上方拡大断面部４０ａをなすクロスメンバ補強部材４３とで構成され、クロスメンバ本体（中央メンバ部材４１、端部メンバ部材４２）が、略平坦で、かつ平面視略矩形の上面（メンバ上面部４１ｃ、メンバ上面部４２ａ）を有する形状に形成されたことにより、電動車両１の下部車体構造は、クロスメンバ本体（中央メンバ部材４１、端部メンバ部材４２）の上面（メンバ上面部４１ｃ、メンバ上面部４２ａ）における前端に沿った稜線、及び後端に沿った稜線を、略一直線状にすることができる。 Further, the second floor cross member 40 connects the left and right side sills 7 and forms a closed cross section extending in the vehicle width direction with the front floor panel 8 (center member member 41, end member member 42). , Fixed to the cross member main body (center member member 41, end member member 42), and composed of a cross member reinforcing member 43 forming an upward enlarged cross-sectional portion 40a, the cross member main body (center member member 41, end portion). Since the member member 42) is formed in a shape having a substantially flat and substantially rectangular upper surface (member upper surface portion 41c, member upper surface portion 42a), the lower body structure of the electric vehicle 1 is a cross member main body. The ridge line along the front end and the ridge line along the rear end on the upper surface (member upper surface portion 41c, member upper surface portion 42a) of (center member member 41, end member member 42) can be made substantially linear.

このため、電動車両１の下部車体構造は、車両側方からの衝突荷重を、一方のサイドシル７から第２フロアクロスメンバ４０を介して、他方のサイドシル７に効率よく伝達することができる。
従って、電動車両１の下部車体構造は、乗員の足元空間を損なうことなく、安定した側突性能を確保することができる。 Therefore, the lower body structure of the electric vehicle 1 can efficiently transmit the collision load from the side of the vehicle from one side sill 7 to the other side sill 7 via the second floor cross member 40.
Therefore, the lower body structure of the electric vehicle 1 can ensure stable lateral collision performance without impairing the foot space of the occupant.

また、フロントフロアパネル８に配設されるとともに、サイドシル７の近傍を車両前後方向に延びる左右一対のフロアフレームロア１２を備え、クロスメンバ本体が、フロアフレームロア１２の間に位置する中央メンバ部材４１と、中央メンバ部材４１の車幅方向両端に位置する左右一対の端部メンバ部材４２とで構成され、中央メンバ部材４１が、端部メンバ部材４２の剛性よりも高剛性な一つの部材で構成されたことにより、電動車両１の下部車体構造は、左右のフロアフレームロア１２の間における車室床面の剛性を向上できるため、より安定した側突性能を確保することができる。 Further, a central member member is provided on the front floor panel 8 and includes a pair of left and right floor frame lowers 12 extending in the front-rear direction of the vehicle in the vicinity of the side sill 7, and the cross member main body is located between the floor frame lowers 12. It is composed of 41 and a pair of left and right end member members 42 located at both ends in the vehicle width direction of the central member member 41, and the central member member 41 is one member having a rigidity higher than the rigidity of the end member member 42. Due to the configuration, the lower body structure of the electric vehicle 1 can improve the rigidity of the vehicle interior floor surface between the left and right floor frame lowers 12, so that more stable lateral collision performance can be ensured.

具体的には、第２フロアクロスメンバ４０の端部メンバ部材４２が、フロアフレームロア１２とサイドシル７との間に位置するため、電動車両１の下部車体構造は、サイドシル７に作用する車両側方からの衝突荷重を、第２フロアクロスメンバ４０の端部メンバ部材４２を介して、フロアフレームロア１２と、第２フロアクロスメンバ４０の中央メンバ部材４１とに分散伝達することができる。 Specifically, since the end member member 42 of the second floor cross member 40 is located between the floor frame lower 12 and the side sill 7, the lower body structure of the electric vehicle 1 is on the vehicle side acting on the side sill 7. The collision load from the side can be distributed and transmitted to the floor frame lower 12 and the central member member 41 of the second floor cross member 40 via the end member member 42 of the second floor cross member 40.

この際、中央メンバ部材４１の剛性に対して端部メンバ部材４２の剛性が低いため、電動車両１の下部車体構造は、車両側方からの衝突荷重を、端部メンバ部材４２の変形によって吸収することができる。このため、電動車両１の下部車体構造は、中央メンバ部材４１に作用する車両側方からの側突荷重を抑えることができる。
これにより、電動車両１の下部車体構造は、左右のフロアフレームロア１２の間における車室床面の剛性を向上できるため、より安定した側突性能を確保することができる。 At this time, since the rigidity of the end member member 42 is lower than the rigidity of the central member member 41, the lower body structure of the electric vehicle 1 absorbs the collision load from the vehicle side by the deformation of the end member member 42. can do. Therefore, the lower body structure of the electric vehicle 1 can suppress the lateral impact load acting on the central member member 41 from the side of the vehicle.
As a result, the lower body structure of the electric vehicle 1 can improve the rigidity of the vehicle interior floor surface between the left and right floor frame lowers 12, so that more stable lateral collision performance can be ensured.

また、クロスメンバ補強部材４３が、車両前後方向に沿った縦断面において、中央メンバ部材４１の下端を介してフロントフロアパネル８に接合されるとともに、中央メンバ部材４１とで閉断面をなす断面形状に形成されたことにより、電動車両１の下部車体構造は、第２フロアクロスメンバ４０の車幅方向略中央近傍における剛性をより向上することができる。このため、電動車両１の下部車体構造は、乗員の足元空間を損なうことなく、さらに安定した側突性能を確保することができる。 Further, the cross member reinforcing member 43 is joined to the front floor panel 8 via the lower end of the central member member 41 in a vertical cross section along the vehicle front-rear direction, and has a cross-sectional shape forming a closed cross section with the central member member 41. The lower body structure of the electric vehicle 1 can further improve the rigidity of the second floor cross member 40 in the vicinity of substantially the center in the vehicle width direction. Therefore, the lower body structure of the electric vehicle 1 can secure more stable lateral collision performance without impairing the foot space of the occupant.

また、クロスメンバ補強部材４３の上面部４３ａが、車幅方向の両端に前席１８の後方脚部が固定される前席内側固定部４３ｈを備え、前席内側固定部４３ｈが、車幅方向に沿った縦断面において、上面部４３ａにおける車幅方向略中央に略同じ車両上下方向の位置に形成されたことにより、電動車両１の下部車体構造は、前席内側固定部４３ｈを設けた場合であっても、クロスメンバ補強部材４３の上面部４３ａにおける前端に沿った稜線、及び後端に沿った稜線を略一直線状に形成することができる。このため、電動車両１の下部車体構造は、車両側方からの衝突荷重を、一方のサイドシル７から第２フロアクロスメンバ４０を介して、他方のサイドシル７にさらに効率よく伝達することができる。 Further, the upper surface portion 43a of the cross member reinforcing member 43 includes front seat inner fixing portions 43h in which the rear legs of the front seat 18 are fixed at both ends in the vehicle width direction, and the front seat inner fixing portion 43h is provided in the vehicle width direction. In the vertical cross section along the above, the lower body structure of the electric vehicle 1 is provided with the front seat inner fixing portion 43h because the upper surface portion 43a is formed at substantially the same vertical position of the vehicle in the vehicle width direction. Even so, the ridge line along the front end and the ridge line along the rear end of the upper surface portion 43a of the cross member reinforcing member 43 can be formed in a substantially linear shape. Therefore, the lower body structure of the electric vehicle 1 can more efficiently transmit the collision load from the side of the vehicle from one side sill 7 to the other side sill 7 via the second floor cross member 40.

さらに、電動車両１の下部車体構造は、クロスメンバ補強部材４３の上面部４３ａにおける車両上下方向の凹凸を抑えることができるため、第２フロアクロスメンバ４０の高さを抑えることができるとともに、クロスメンバ補強部材４３の成形性を向上することができる。
従って、電動車両１の下部車体構造は、乗員の足元空間と、安定した側突性能と、第２フロアクロスメンバ４０の成形性とを確保することができる。 Further, the lower body structure of the electric vehicle 1 can suppress unevenness in the vehicle vertical direction on the upper surface portion 43a of the cross member reinforcing member 43, so that the height of the second floor cross member 40 can be suppressed and the cross can be suppressed. The moldability of the member reinforcing member 43 can be improved.
Therefore, the lower body structure of the electric vehicle 1 can secure the foot space of the occupant, the stable side collision performance, and the moldability of the second floor cross member 40.

また、車両前後方向に長い長尺形状で、前部、及び後部が車体に連結されたコンソール支持ブラケット６０を備え、コンソール支持ブラケット６０が、車幅方向に沿った縦断面において、車幅方向に対向する左右一対のブラケット側壁部６７１を有する断面略門型形状に形成され、コンソール支持ブラケット６０のブラケット側壁部６７１が、第２フロアクロスメンバ４０の上方拡大断面部４０ａに固定されたことにより、電動車両１の下部車体構造は、重量の増加を抑えて、より一層安定した側突性能を確保することができる。 Further, a console support bracket 60 having a long shape long in the front-rear direction of the vehicle and having front and rear portions connected to the vehicle body is provided, and the console support bracket 60 has a vertical cross section along the vehicle width direction in the vehicle width direction. It is formed in a substantially gate-shaped cross section having a pair of left and right bracket side wall portions 671 facing each other, and the bracket side wall portion 671 of the console support bracket 60 is fixed to the upward enlarged cross section 40a of the second floor cross member 40. The lower body structure of the electric vehicle 1 can suppress an increase in weight and secure even more stable lateral collision performance.

具体的には、車幅方向に長尺な第２フロアクロスメンバ４０の上方拡大断面部４０ａを、前部、及び後部が車体に連結されたコンソール支持ブラケット６０で支持できるため、電動車両１の下部車体構造は、第２フロアクロスメンバ４０における車幅方向略中央近傍の剛性を向上することができる。 Specifically, since the upward enlarged cross-sectional portion 40a of the second floor cross member 40, which is long in the vehicle width direction, can be supported by the console support bracket 60 whose front and rear portions are connected to the vehicle body, the electric vehicle 1 can be supported. The lower vehicle body structure can improve the rigidity of the second floor cross member 40 in the vicinity of substantially the center in the vehicle width direction.

さらに、コンソール支持ブラケット６０のブラケット側壁部６７１が上方拡大断面部４０ａに固定されているため、電動車両１の下部車体構造は、第２フロアクロスメンバ４０に作用した車両側方からの側突荷重を、コンソール支持ブラケット６０を介して車両前後方向に分散伝達することができる。このため、電動車両１の下部車体構造は、車両側方からの側突荷重に対する車室床面の剛性を向上することができる。 Further, since the bracket side wall portion 671 of the console support bracket 60 is fixed to the upward enlarged cross-sectional portion 40a, the lower body structure of the electric vehicle 1 has a lateral impact load acting on the second floor cross member 40 from the vehicle side. Can be distributed and transmitted in the front-rear direction of the vehicle via the console support bracket 60. Therefore, the lower body structure of the electric vehicle 1 can improve the rigidity of the vehicle interior floor surface with respect to the lateral impact load from the vehicle side.

加えて、コンソール支持ブラケット６０のブラケット側壁部６７１がフロントフロアパネル８に固定されていないため、電動車両１の下部車体構造は、コンソール支持ブラケット６０のブラケット側壁部６７１がフロントフロアパネル８に固定される場合に比べて、ブラケット側壁部６７１における車両上下方向の長さを短くすることができる。これにより、電動車両１の下部車体構造は、ブラケット側壁部６７１がフロントフロアパネル８に固定される場合に比べて、コンソール支持ブラケット６０の重量を抑えることができる。
従って、電動車両１の下部車体構造は、重量の増加を抑えて、より一層安定した側突性能を確保することができる。 In addition, since the bracket side wall portion 671 of the console support bracket 60 is not fixed to the front floor panel 8, the lower body structure of the electric vehicle 1 is such that the bracket side wall portion 671 of the console support bracket 60 is fixed to the front floor panel 8. The length of the bracket side wall portion 671 in the vehicle vertical direction can be shortened as compared with the case where the bracket side wall portion 671 is used. As a result, the lower body structure of the electric vehicle 1 can reduce the weight of the console support bracket 60 as compared with the case where the bracket side wall portion 671 is fixed to the front floor panel 8.
Therefore, the lower body structure of the electric vehicle 1 can suppress the increase in weight and secure more stable side collision performance.

この発明の構成と、上述の実施形態との対応において、
この発明のフロアパネルは、実施形態のフロントフロアパネル８に対応し、
以下同様に、
フロアクロスメンバは、第２フロアクロスメンバ４０に対応し、
クロスメンバ本体は、中央メンバ部材４１、及び端部メンバ部材４２に対応し、
クロスメンバ本体の上面は、中央メンバ部材４１のメンバ上面部４１ｃ、及び端部メンバ部材４２のメンバ上面部４２ａに対応し、
フロアフレームは、フロアフレームロア１２に対応し、
メンバ中央部は、中央メンバ部材４１に対応し、
メンバ端部は、端部メンバ部材４２に対応し、
クロスメンバ補強部材の上面は、クロスメンバ補強部材４３の上面部４３ａに対応し、
座席固定部は、前席内側固定部４３ｈに対応し、
長尺部材は、コンソール支持ブラケット６０に対応し、
側壁部は、ブラケット側壁部６７１に対応するが、
この発明は、上述の実施形態の構成のみに限定されるものではなく、多くの実施の形態を得ることができる。 In the correspondence between the configuration of the present invention and the above-described embodiment,
The floor panel of the present invention corresponds to the front floor panel 8 of the embodiment.
Similarly below
The floor cross member corresponds to the second floor cross member 40,
The cross member body corresponds to the central member member 41 and the end member member 42.
The upper surface of the cross member main body corresponds to the member upper surface portion 41c of the central member member 41 and the member upper surface portion 42a of the end member member 42.
The floor frame corresponds to the floor frame lower 12
The central part of the member corresponds to the central member member 41.
The member end corresponds to the end member member 42 and
The upper surface of the cross member reinforcing member corresponds to the upper surface portion 43a of the cross member reinforcing member 43.
The seat fixing part corresponds to the front seat inside fixing part 43h,
The long member corresponds to the console support bracket 60 and
The side wall corresponds to the bracket side wall 671,
The present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

例えば、上述した実施形態において、フロントフロアパネル８の前部に別体で構成した膨出部材１４を接合した構成としたが、これに限定せず、フロントフロアパネル８の前部における車幅方向略中央近傍を車両上方に膨出させて、フロントフロアパネル８に膨出部材１４を一体形成してもよい。 For example, in the above-described embodiment, the bulging member 14 formed separately is joined to the front portion of the front floor panel 8, but the present invention is not limited to this, and the vehicle width direction in the front portion of the front floor panel 8 is not limited to this. The bulging member 14 may be integrally formed on the front floor panel 8 by bulging substantially the vicinity of the center above the vehicle.

また、フロントフロアパネル８の後部とキックアップ部９とを連結するキックアップ補強部材５０を別体で構成したが、これに限定せず、キックアップ補強部材５０をフロントフロアパネル８、またはキックアップ部９に一体形成してもよい。 Further, the kick-up reinforcing member 50 that connects the rear portion of the front floor panel 8 and the kick-up portion 9 is configured as a separate body, but the kick-up reinforcing member 50 is not limited to this, and the kick-up reinforcing member 50 is the front floor panel 8 or the kick-up. It may be integrally formed with the portion 9.

また、第２フロアクロスメンバ４０を、中央メンバ部材４１、左右一対の端部メンバ部材４２、及びクロスメンバ補強部材４３で構成したが、これに限定せず、例えば、中央メンバ部材４１と左右の端部メンバ部材４２とが一体形成された第２フロアクロスメンバとしてもよい。あるいは、中央メンバ部材４１とクロスメンバ補強部材４３とが一体形成された、もしくは中央メンバ部材４１、左右一対の端部メンバ部材４２、及びクロスメンバ補強部材４３が一体形成された第２フロアクロスメンバとしてもよい。 Further, the second floor cross member 40 is composed of a central member member 41, a pair of left and right end member members 42, and a cross member reinforcing member 43, but the present invention is not limited to this, and for example, the central member member 41 and the left and right are left and right. The second floor cross member may be integrally formed with the end member member 42. Alternatively, a second floor cross member in which the central member member 41 and the cross member reinforcing member 43 are integrally formed, or the central member member 41, a pair of left and right end member members 42, and the cross member reinforcing member 43 are integrally formed. May be.

また、第１支持ブラケット６１と第２支持ブラケット６２とが締結固定されたコンソール支持ブラケット６０としたが、これに限定せず、第１支持ブラケット６１と第２支持ブラケット６２とが接合されたコンソール支持ブラケットとしてもよい。 Further, the console support bracket 60 in which the first support bracket 61 and the second support bracket 62 are fastened and fixed is used, but the present invention is not limited to this, and the console in which the first support bracket 61 and the second support bracket 62 are joined is not limited to this. It may be used as a support bracket.

また、コンソール支持ブラケット６０を第１支持ブラケット６１と第２支持ブラケット６２とで構成したが、これに限定せず、第１支持ブラケット６１と第２支持ブラケット６２とが一体形成されたコンソール支持ブラケットとしてもよい。 Further, the console support bracket 60 is composed of the first support bracket 61 and the second support bracket 62, but the present invention is not limited to this, and the console support bracket in which the first support bracket 61 and the second support bracket 62 are integrally formed is formed. May be.

また、前部車体である膨出部材１４と後部車体であるキックアップ補強部材５０とを、センターコンソール３、シフトレバー４、及びシフトレバー支持ブラケット５を支持するコンソール支持ブラケット６０で車両前後方向に連結したが、これに限定せず、膨出部材１４とキックアップ補強部材５０とを、車両前後方向に荷重を伝達する長尺部材で、車両前後方向に連結してもよい。 Further, the bulging member 14 which is the front vehicle body and the kick-up reinforcing member 50 which is the rear vehicle body are connected to the center console 3, the shift lever 4, and the console support bracket 60 which supports the shift lever support bracket 5 in the front-rear direction of the vehicle. Although they are connected, the present invention is not limited to this, and the bulging member 14 and the kick-up reinforcing member 50 may be connected in the vehicle front-rear direction with a long member that transmits a load in the vehicle front-rear direction.

１…電動車両
７…サイドシル
８…フロントフロアパネル
１２…フロアフレームロア
１８…前席
４０…第２フロアクロスメンバ
４０ａ…上方拡大断面部
４１…中央メンバ部材
４１ｃ…メンバ上面部
４２…端部メンバ部材
４２ａ…メンバ上面部
４３…クロスメンバ補強部材
４３ａ…上面部
４３ｈ…前席内側固定部
６０…コンソール支持ブラケット
６７１…ブラケット側壁部 1 ... Electric vehicle 7 ... Side sill 8 ... Front floor panel 12 ... Floor frame lower 18 ... Front seat 40 ... Second floor cross member 40a ... Upward enlarged cross section 41 ... Central member member 41c ... Member upper surface 42 ... End member member 42a ... Member upper surface 43 ... Cross member reinforcing member 43a ... Upper surface 43h ... Front seat inside fixing portion 60 ... Console support bracket 671 ... Bracket side wall

Claims (6)

回転電機の出力を駆動力とする電動車両の下部車体構造であって、
車両前後方向に延びる左右一対のサイドシルと、
該サイドシルの間に配設された略平坦なフロアパネルと、
乗員が着席する前席と後席との間におけるフロアパネルの上面に配設されるとともに、前記フロアパネルから前記サイドシルの上面までの高さよりも低い高さで、左右の前記サイドシルを車幅方向に連結するフロアクロスメンバとを備え、
該フロアクロスメンバが、
車幅方向に沿った縦断面において、車幅方向端部近傍の上面に対して車両上方に上面が位置するように、車幅方向略中央近傍の断面形状を車両上方に拡大させた上方拡大断面部を備えた
電動車両の下部車体構造。 It is a lower body structure of an electric vehicle that uses the output of a rotating electric machine as a driving force.
A pair of left and right side sills extending in the front-rear direction of the vehicle,
A substantially flat floor panel arranged between the side sills and
The left and right side sills are arranged in the vehicle width direction at a height lower than the height from the floor panel to the upper surface of the side sill while being arranged on the upper surface of the floor panel between the front seat and the rear seat where the occupant is seated. Equipped with a floor cross member that connects to
The floor cross member
In the vertical cross section along the vehicle width direction, the cross-sectional shape near the center of the vehicle width direction is expanded upward so that the upper surface is located above the vehicle surface with respect to the upper surface near the end in the vehicle width direction. Lower body structure of an electric vehicle equipped with a part. 前記フロアクロスメンバが、
左右の前記サイドシルを連結するとともに、前記フロアパネルとで車幅方向に延びる閉断面をなすクロスメンバ本体と、
該クロスメンバ本体に固定されるとともに、前記上方拡大断面部をなすクロスメンバ補強部材とで構成され、
前記クロスメンバ本体が、
略平坦で、かつ平面視略矩形の上面を有する形状に形成された
請求項１に記載の電動車両の下部車体構造。 The floor cross member
A cross member main body that connects the left and right side sills and forms a closed cross section extending in the vehicle width direction with the floor panel.
It is fixed to the cross member main body and is composed of a cross member reinforcing member forming the upward enlarged cross section.
The cross member body
The lower body structure of the electric vehicle according to claim 1, which is formed in a shape that is substantially flat and has an upper surface that is substantially rectangular in a plan view. 前記フロアパネルに配設されるとともに、前記サイドシルの近傍を車両前後方向に延びる左右一対のフロアフレームを備え、
前記クロスメンバ本体が、
前記フロアフレームの間に位置するメンバ中央部と、
該メンバ中央部の車幅方向両端に位置する左右一対のメンバ端部とで構成され、
前記メンバ中央部が、
前記メンバ端部の剛性よりも高剛性な一つの部材で構成された
請求項２に記載の電動車両の下部車体構造。 A pair of left and right floor frames that are arranged on the floor panel and extend in the front-rear direction of the vehicle in the vicinity of the side sill are provided.
The cross member body
The central part of the member located between the floor frames and
It is composed of a pair of left and right member ends located at both ends in the vehicle width direction at the center of the member.
The central part of the member
The lower body structure of an electric vehicle according to claim 2, which is composed of one member having a rigidity higher than the rigidity of the member end. 前記クロスメンバ補強部材が、
車両前後方向に沿った縦断面において、前記クロスメンバ本体の下端を介して前記フロアパネルに接合されるとともに、前記クロスメンバ本体とで閉断面をなす断面形状に形成された
請求項２または請求項３に記載の電動車両の下部車体構造。 The cross member reinforcing member
Claim 2 or claim 2 or a cross section formed in a vertical cross section along the vehicle front-rear direction, which is joined to the floor panel via the lower end of the cross member main body and has a closed cross section with the cross member main body. The lower body structure of the electric vehicle according to 3. 前記クロスメンバ補強部材の上面が、
車幅方向の両端に前記前席の後方脚部が固定される座席固定部を備え、
該座席固定部が、
車幅方向に沿った縦断面において、前記上方拡大断面部の上面における車幅方向略中央に略同じ車両上下方向の位置に形成された
請求項２から請求項４のいずれか１つに記載の電動車両の下部車体構造。 The upper surface of the cross member reinforcing member
Seat fixing parts for fixing the rear legs of the front seats are provided at both ends in the vehicle width direction.
The seat fixing part
The invention according to any one of claims 2 to 4, wherein in a vertical cross section along the vehicle width direction, the vehicle is formed at substantially the same vertical position in the vehicle width direction on the upper surface of the upward enlarged cross section. Lower body structure of electric vehicle. 車両前後方向に長い長尺形状で、前部、及び後部が車体に連結された長尺部材を備え、
該長尺部材が、
車幅方向に沿った縦断面において、車幅方向に対向する左右一対の側壁部を有する断面略門型形状に形成され、
前記長尺部材の前記側壁部が、
前記フロアクロスメンバの前記上方拡大断面部に固定された
請求項１から請求項５のいずれか１つに記載の電動車両の下部車体構造。
It has a long shape that is long in the front-rear direction of the vehicle, and is equipped with a long member whose front and rear parts are connected to the vehicle body.
The long member
In the vertical cross section along the vehicle width direction, the cross section is formed in a substantially gate shape having a pair of left and right side wall portions facing the vehicle width direction.
The side wall portion of the long member
The lower body structure of an electric vehicle according to any one of claims 1 to 5, which is fixed to the upward enlarged cross section of the floor cross member.
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