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WO2013103081A1 - Vehicle body structure for automobile - Google Patents

Vehicle body structure for automobile Download PDF

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Publication number
WO2013103081A1
WO2013103081A1 PCT/JP2012/082633 JP2012082633W WO2013103081A1 WO 2013103081 A1 WO2013103081 A1 WO 2013103081A1 JP 2012082633 W JP2012082633 W JP 2012082633W WO 2013103081 A1 WO2013103081 A1 WO 2013103081A1
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WO
WIPO (PCT)
Prior art keywords
width direction
vehicle width
floor panel
bulging
body structure
Prior art date
Application number
PCT/JP2012/082633
Other languages
French (fr)
Japanese (ja)
Inventor
朋也 彌武
尚平 川田
紘 槙島
正太郎 鮎澤
重人 安原
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2013552400A priority Critical patent/JP5734465B2/en
Publication of WO2013103081A1 publication Critical patent/WO2013103081A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
    • B62D25/2018—Floors or bottom sub-units in connection with other superstructure subunits the subunits being front structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
    • B62D29/041—Understructures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—Front or rear frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/082—Engine compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/16—Mud-guards or wings; Wheel cover panels
    • B62D25/161—Mud-guards made of non-conventional material, e.g. rubber, plastics

Definitions

  • a floor panel portion a front wall portion standing upright from the front end of the floor panel portion, a rear wall portion standing upright from the rear end of the floor panel portion, and the vehicle width direction both ends of the floor panel portion
  • the present invention relates to a vehicle body structure of an automobile in which a bathtub-like cabin having left and right side sill parts is formed from a sheet made of a fiber reinforced resin.
  • a dash lower panel of an automobile is constituted by a dash front panel to which rear ends of left and right front side members (front side frames) are connected, and a dash rear panel to which front ends of left and right front pillars and floor tunnels are connected.
  • a device for transmitting the collision load inputted from the left and right front side members to the left and right front pillars and floor tunnels It is known from document 1.
  • the present invention has been made in view of the above-described circumstances, and it is an object of the present invention to improve collision resistance performance while achieving weight reduction and size reduction of a vehicle body made of fiber reinforced resin.
  • a floor panel portion a front wall portion rising from a front end of the floor panel portion, a rear wall portion rising from a rear end of the floor panel portion, and the floor
  • It is a vehicle body structure of an automobile in which a bathtub-like cabin having left and right side sills standing from both ends in the vehicle width direction of the panel unit is molded from a sheet made of fiber reinforced resin, and supports the rear ends of the left and right front side frames
  • the left and right front bulging parts are expanded forward from the front wall part, and the wheel house part continuous from the rear end of the front bulging part to the front end of the front side frame is formed of a honeycomb panel.
  • a vehicle body structure characterized by 1 is proposed.
  • a second feature is that a vehicle width direction outer surface of a front end of the wheel house portion is continuous with a vehicle width direction outer surface of a rear end of the front side frame.
  • a car body structure of a car is proposed.
  • the front bulging portion is configured to have a closed cross section by closing an opening portion opened in the front wall portion with an inner floor panel.
  • a vehicle body structure characterized by 3 is proposed.
  • the opening portion inside the vehicle width direction of the side sill portion is closed by an inner side panel to form a closed cross section.
  • a vehicle body structure characterized by 4 is proposed.
  • the floor panel portion further includes a triangular-shaped downward bulging portion bulging downward from both side portions in the vehicle width direction of the front portion;
  • a fifth aspect of the present invention there is proposed a vehicle body structure of an automobile, characterized in that a ridge line on the inner side in the vehicle width direction connects the inner surface in the vehicle width direction of the front side frame and the inner surface in the vehicle width direction of the side sill portion.
  • a sixth feature of the automobile is that the lower bulging portion of the floor panel portion is closed by the inner floor panel to form a closed cross section.
  • a car body structure is proposed.
  • a bathtub-like cabin having a floor panel portion, a front wall portion, a rear wall portion, and left and right side sill portions is molded from a sheet made of fiber reinforced resin, so its weight is reduced. can do.
  • the left and right front bulging portions supporting the rear end of the left and right front side frames are expanded forward from the front wall portion, and the wheel house portion continuous from the rear end of the front bulging portion to the front end of the front side frame Because of the high rigidity honeycomb panel, the front collision load input from the front wheel to the wheel house is transmitted from the wheel house to the side sill and is input from the front side frame to the wheel house at the frontal collision of the vehicle.
  • the frontal collision load By transmitting the frontal collision load from the wheel house portion to the side sill, the frontal collision load can be transmitted to the high strength side sill portion and efficiently absorbed.
  • the frontal collision load since it is not necessary to increase the impact absorption stroke of the front wheels to absorb the frontal collision load, it is possible to shorten the overall length of the vehicle body by making the front wheels approach the wheel house portion.
  • the wheel house portion since the outer surface in the vehicle width direction of the front end of the wheel house portion is continuous with the outer surface in the vehicle width direction of the rear end of the front side frame, the wheel house from the outer surface in the vehicle width direction of the front side frame The frontal collision load input to the part can be efficiently transmitted to the side sill part.
  • the opening portion which the front bulging portion opens in the front wall portion is closed by the inner floor panel to form a closed cross section, opening of the front bulging portion is prevented.
  • the strength against the frontal collision load can be further enhanced.
  • the opening in the vehicle width direction inner side of the side sill is closed by the inner side panel to form a closed cross section, the opening of the side sill is prevented from opening.
  • the strength against bumping can be further enhanced.
  • a triangular downward bulging portion bulging downward from both side portions in the vehicle width direction of the front portion of the floor panel portion is provided.
  • the ridge line connects the inner surface of the front side frame in the width direction of the vehicle to the inner surface of the side sill in the width direction. Therefore, the front collision load input to the front side frame is efficiently delivered to the side sill through the high strength ridge of the downward bulging portion. Can be transmitted.
  • the lower bulging portion of the floor panel portion is closed by the inner floor panel to form a closed cross section, opening of the lower bulging portion is prevented and the front side frame is Load transfer to the side sill portion can be performed more reliably.
  • FIG. 1 is a perspective view of a cabin of a fiber-reinforced resin automobile.
  • First Embodiment FIG. 2 is a view in the direction of arrows in FIG.
  • First Embodiment FIG. 3 is a view in the direction of arrows in FIG.
  • First Embodiment FIG. 4 is a view in the direction of four arrows in FIG.
  • First Embodiment FIG. 5 is a cross-sectional view taken along line 5-5 of FIG.
  • First Embodiment 6 is a cross-sectional view taken along line 6-6 of FIG.
  • FIGS. 1 to 6 An embodiment of the present invention will be described based on FIGS. 1 to 6.
  • a cabin 11 of a car made of carbon fiber reinforced resin includes a floor panel 12 and a pair of side sills 13 extending in the front-rear direction along the left and right side edges of the floor panel 12. 13 and a front panel 14 rising from the front end of the floor panel 12 to connect between the front ends of the left and right side sills 13 and 13 and a floor panel so as to connect between the rear ends of the left and right side sills 13 and 13 It has a rear wall portion 15 standing up from the rear end of the portion 12, and is formed in a bathtub shape as a whole.
  • CFRP carbon fiber reinforced resin
  • the floor panel portion 12 is raised one step higher at the rear with respect to the front with the kick-up portion 12a extending in the vehicle width direction, and extends in the front-rear direction at the center in the vehicle width direction at the front.
  • a floor tunnel portion 12b connecting the kickup portion 12a is formed.
  • the main body portion of the cabin 11 is formed by a so-called "hand lay-up” method in which a sheet made of a woven fabric of continuous carbon fibers is solidified with a resin along a forming surface of a forming die. Since the member of closed cross section can not be formed by the method of "hand lay up", a pair of left and right inner side panels 16, 16 made of fiber reinforced resin, and a pair of left and right inner front panels 17, 17 made of fiber reinforced resin. By forming a separate member and connecting them, a high strength closed cross-section portion is configured.
  • the left and right side sills 13, 13 of the cabin 11, and the pair of left and right front pillar lowers 18, 18 extending upward from the front ends of the side sills 13, 13 and connected to both ends of the front wall 14 in the vehicle width direction are It has a U-shaped cross-section opening inward in the vehicle width direction, but it is closed by bonding the left and right pair of inner side panels 16, 16 to the opening by bonding or by using welding and rivet 19 together. Configured in cross section (see FIGS. 5 and 6).
  • the wheel house parts 21 and 21 are formed of high strength honeycomb panels.
  • the honeycomb panel is obtained by sandwiching a core material made of, for example, aluminum between two sheets made of CFRP.
  • the inner spaces of the lower bulging parts 22, 22 communicate with the inner spaces of the side sills 13, 13, and the side sill parts 13, 13 and the lower bulging parts 22, 22 communicate with each other to form a closed cross section ( See Figure 5).
  • the front portions of the inner front panels 17, 17 extend forward from the floor panel 12 and are connected to the wheel house 21 and the front wall 14.
  • the rear end of the front bulging portion 24 is open to the front wall portion 14, but the opening is closed by the inner front panel 17 (see FIG. 6).
  • the rear ends of a pair of left and right metal front side frames 26, 26 are joined to the metal joints 25, 25 by bolts 27.
  • the wheel house 21 is made of a high strength honeycomb plate.
  • the load F1 is efficiently transmitted from the wheel house 21 to the front end of the side sill 13, and is absorbed by the high strength side sill 13 having a closed cross-sectional structure.
  • a part F2 of the collision load input to the front side frame 26 due to a frontal collision of the car is input from the outer side of the front side frame 26 in the vehicle width direction to the front end of the wheel house 21 and a honeycomb plate with high strength It is transmitted to the front end of the side sill portion 13 along the configured wheel house portion 21 and absorbed.
  • the outer surface in the vehicle width direction of the rear end of the front side frame 26 is continuous with the outer surface in the vehicle width direction of the front end of the wheel house portion 21, the front is input to the wheel house portion 21 from the outer surface in the vehicle width direction of the front side frame 26
  • the bump load can be efficiently transmitted to the side sill portion 13.
  • the other part F3 of the collision load is transmitted diagonally backward from the inner surface side in the vehicle width direction of the front side frame 26 along the high ridgeline 12c of the downward bulging part 22 of the floor panel 12, and the side sill part It is transmitted to and absorbed by the inner surface of the vehicle in the vehicle width direction.
  • the collision loads F1, F2 and F3 of the frontal collision of the car are the ridgelines 12c of the wheel house parts 21 and 21 formed of a high strength honeycomb plate and the high strength lower bulging parts 22 and 22, It is transmitted to the side sills 13, 13 by 12c and absorbed.
  • the front wheels 20, 20 can be made closer to the wheel house portions 21, 21, thereby shortening the overall length of the vehicle body.
  • the rear ends of the forward bulging portions 24 and 24 present in the transmission path of the collision load are open at the rear surface of the front wall portion 14, but the opening is closed by the inner floor panels 17 and 17 to form a closed cross section. Since it comprised, the opening difference of the front bulging part 24 and 24 can be prevented, and the intensity
  • the inner side panels 16 and 16 close the openings at the inner side in the vehicle width direction of the side sills 13 and 13 to form a closed cross section, the opening of the side sills 13 and 13 is prevented from opening.
  • the strength against bumping can be further enhanced.
  • fiber reinforced resin is not limited to carbon fiber reinforced resin.
  • the cabin 11 is shape

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

Abstract

A vehicle body structure for an automobile, wherein left and right forward-bulging parts (24) for supporting the rear ends of left and right front side frames (26) are caused to bulge forward from a front wall part (14), and a wheelhouse part (21) continuing from the rear ends of the forward-bulging parts (24) to the front ends of the front side frames (26) is configured from a highly rigid honeycomb panel, a frontal collision load inputted to the wheelhouse part (21) from a front wheel during a frontal collision of the vehicle therefore being transmitted from the wheelhouse part (21) to side sill parts (13), and a frontal collision load inputted to the wheelhouse part (21) from the front side frames (26) being transmitted from the wheelhouse part (21) to the side sill parts (13), whereby the frontal collision load can be transmitted to the high-strength side sill parts (13) and efficiently absorbed. Since there is also no need to increase the shock absorption stroke of the front wheel to absorb a frontal collision load, the front wheel can be brought closer to the wheelhouse part (21), and the overall length of the vehicle body can be reduced.

Description

自動車の車体構造Body structure of car
　本発明は、フロアパネル部と、前記フロアパネル部の前端から起立するフロント壁部と、前記フロアパネル部の後端から起立するリヤ壁部と、前記フロアパネル部の車幅方向両端から起立する左右のサイドシル部とを有するバスタブ状のキャビンを繊維強化樹脂製のシートから成形した自動車の車体構造に関する。 According to the present invention, a floor panel portion, a front wall portion standing upright from the front end of the floor panel portion, a rear wall portion standing upright from the rear end of the floor panel portion, and the vehicle width direction both ends of the floor panel portion The present invention relates to a vehicle body structure of an automobile in which a bathtub-like cabin having left and right side sill parts is formed from a sheet made of a fiber reinforced resin.
　自動車のダッシュロアパネルを、左右のフロントサイドメンバ（フロントサイドフレーム）の後端が接続されるダッシュフロントパネルと、左右のフロントピラーおよびフロアトンネルの前端が接続されるダッシュリヤパネルとで構成するとともに、ダッシュフロントパネルおよびダッシュリヤパネル間に車幅方向に延びる四角断面の内部骨格部材を配置することで、左右のフロントサイドメンバから入力した衝突荷重を左右のフロントピラーおよびフロアトンネルに伝達するものが、下記特許文献１により公知である。 A dash lower panel of an automobile is constituted by a dash front panel to which rear ends of left and right front side members (front side frames) are connected, and a dash rear panel to which front ends of left and right front pillars and floor tunnels are connected. By arranging an internal frame member having a square cross section extending in the vehicle width direction between the front panel and the dash rear panel, a device for transmitting the collision load inputted from the left and right front side members to the left and right front pillars and floor tunnels It is known from document 1.
日本特開２００８－４９８９４号公報Japanese Patent Laid-Open No. 2008-49894
　ところで、上記特許文献１に記載されたものは、ダッシュロアパネルを、内部骨格部材を挟んで接合されるダッシュフロントパネルおよびダッシュリヤパネルで構成したので、ダッシュロアパネルの重量が大幅に増加するだけでなく、ダッシュロアパネルの車体前後方向の厚さが必然的に増加するために、ダッシュロアパネルの厚さの増加分だけ前輪の位置が前方に移動して車体の全長が増加してしまう問題があった。 By the way, since what was described in the said patent document 1 comprised the dash lower panel by the dash front panel and dash rear panel joined on both sides of an internal frame member, not only the weight of a dash lower panel increases not only Since the thickness of the dash lower panel in the longitudinal direction of the vehicle necessarily increases, there is a problem that the position of the front wheel moves forward by the increase of the thickness of the dash lower panel and the overall length of the vehicle increases.
　本発明は前述の事情に鑑みてなされたもので、繊維強化樹脂製の自動車の車体の軽量化および小型化を図りながら耐衝突性能を高めることを目的とする。 The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to improve collision resistance performance while achieving weight reduction and size reduction of a vehicle body made of fiber reinforced resin.
　上記目的を達成するために、本発明によれば、フロアパネル部と、前記フロアパネル部の前端から起立するフロント壁部と、前記フロアパネル部の後端から起立するリヤ壁部と、前記フロアパネル部の車幅方向両端から起立する左右のサイドシル部とを有するバスタブ状のキャビンを繊維強化樹脂製のシートから成形した自動車の車体構造であって、左右のフロントサイドフレームの後端を支持する左右の前方膨出部を前記フロント壁部から前方に膨出させるとともに、前記前方膨出部の後端から前記フロントサイドフレームの前端へと連続するホイールハウス部をハニカムパネルで構成したことを第１の特徴とする自動車の車体構造が提案される。 In order to achieve the above object, according to the present invention, a floor panel portion, a front wall portion rising from a front end of the floor panel portion, a rear wall portion rising from a rear end of the floor panel portion, and the floor It is a vehicle body structure of an automobile in which a bathtub-like cabin having left and right side sills standing from both ends in the vehicle width direction of the panel unit is molded from a sheet made of fiber reinforced resin, and supports the rear ends of the left and right front side frames The left and right front bulging parts are expanded forward from the front wall part, and the wheel house part continuous from the rear end of the front bulging part to the front end of the front side frame is formed of a honeycomb panel. A vehicle body structure characterized by 1 is proposed.
　また本発明によれば、前記第１の特徴に加えて、前記ホイールハウス部の前端の車幅方向外面は、前記フロントサイドフレームの後端の車幅方向外面に連続することを第２の特徴とする自動車の車体構造が提案される。 Further, according to the present invention, in addition to the first feature, a second feature is that a vehicle width direction outer surface of a front end of the wheel house portion is continuous with a vehicle width direction outer surface of a rear end of the front side frame. A car body structure of a car is proposed.
　また本発明によれば、前記第１または第２の特徴に加えて、前記前方膨出部が前記フロント壁部に開口する開口部をインナーフロアパネルで閉塞して閉断面に構成したことを第３の特徴とする自動車の車体構造が提案される。 Further, according to the present invention, in addition to the first or second feature, the front bulging portion is configured to have a closed cross section by closing an opening portion opened in the front wall portion with an inner floor panel. A vehicle body structure characterized by 3 is proposed.
　また本発明によれば、前記第１～第３の何れか１つの特徴に加えて、前記サイドシル部の車幅方向内側の開口部をインナーサイドパネルで閉塞して閉断面に構成したことを第４の特徴とする自動車の車体構造が提案される。 Further, according to the present invention, in addition to any one of the first to third features, it is preferable that the opening portion inside the vehicle width direction of the side sill portion is closed by an inner side panel to form a closed cross section. A vehicle body structure characterized by 4 is proposed.
　また本発明によれば、前記第３の特徴に加えて、前記フロアパネル部の前部の車幅方向両側部から下方に膨出する三角形状の下方膨出部を備え、前記下方膨出部の車幅方向内側の稜線は前記フロントサイドフレームの車幅方向内面と前記サイドシル部の車幅方向内面とを接続することを第５の特徴とする自動車の車体構造が提案される。 According to the present invention, in addition to the third feature, the floor panel portion further includes a triangular-shaped downward bulging portion bulging downward from both side portions in the vehicle width direction of the front portion; According to a fifth aspect of the present invention, there is proposed a vehicle body structure of an automobile, characterized in that a ridge line on the inner side in the vehicle width direction connects the inner surface in the vehicle width direction of the front side frame and the inner surface in the vehicle width direction of the side sill portion.
　また本発明によれば、前記第５の特徴に加えて、前記フロアパネル部の前記下方膨出部を前記インナーフロアパネルで閉塞して閉断面に構成したことを第６の特徴とする自動車の車体構造が提案される。 According to the present invention, in addition to the fifth feature, a sixth feature of the automobile is that the lower bulging portion of the floor panel portion is closed by the inner floor panel to form a closed cross section. A car body structure is proposed.
　本発明の第１の特徴によれば、フロアパネル部、フロント壁部、リヤ壁部および左右のサイドシル部とを有するバスタブ状のキャビンを繊維強化樹脂製のシートから成形したので、その重量を軽減することができる。左右のフロントサイドフレームの後端を支持する左右の前方膨出部をフロント壁部から前方に膨出させるとともに、前方膨出部の後端からフロントサイドフレームの前端へと連続するホイールハウス部を高剛性のハニカムパネルで構成したので、車両の前面衝突時に、前輪からホイールハウス部に入力された前突荷重をホイールハウス部からサイドシルに伝達し、かつフロントサイドフレームからホイールハウス部に入力された前突荷重をホイールハウス部からサイドシルに伝達することで、前突荷重を強度の高いサイドシル部に伝達して効率的に吸収することができる。また前輪の衝撃吸収ストロークを増加させて前突荷重を吸収する必要がないため、前輪をホイールハウス部に接近させて車体の全長を短縮することができる。 According to the first feature of the present invention, a bathtub-like cabin having a floor panel portion, a front wall portion, a rear wall portion, and left and right side sill portions is molded from a sheet made of fiber reinforced resin, so its weight is reduced. can do. The left and right front bulging portions supporting the rear end of the left and right front side frames are expanded forward from the front wall portion, and the wheel house portion continuous from the rear end of the front bulging portion to the front end of the front side frame Because of the high rigidity honeycomb panel, the front collision load input from the front wheel to the wheel house is transmitted from the wheel house to the side sill and is input from the front side frame to the wheel house at the frontal collision of the vehicle. By transmitting the frontal collision load from the wheel house portion to the side sill, the frontal collision load can be transmitted to the high strength side sill portion and efficiently absorbed. In addition, since it is not necessary to increase the impact absorption stroke of the front wheels to absorb the frontal collision load, it is possible to shorten the overall length of the vehicle body by making the front wheels approach the wheel house portion.
　また本発明の第２の特徴によれば、ホイールハウス部の前端の車幅方向外面がフロントサイドフレームの後端の車幅方向外面に連続するので、フロントサイドフレームの車幅方向外面からホイールハウス部に入力した前突荷重を効率的にサイドシル部に伝達することができる。 Further, according to the second feature of the present invention, since the outer surface in the vehicle width direction of the front end of the wheel house portion is continuous with the outer surface in the vehicle width direction of the rear end of the front side frame, the wheel house from the outer surface in the vehicle width direction of the front side frame The frontal collision load input to the part can be efficiently transmitted to the side sill part.
　また本発明の第３の特徴によれば、前方膨出部がフロント壁部に開口する開口部をインナーフロアパネルで閉塞して閉断面に構成したので、前方膨出部の口開きを防止して前突荷重に対する強度を更に高めることができる。 Further, according to the third feature of the present invention, since the opening portion which the front bulging portion opens in the front wall portion is closed by the inner floor panel to form a closed cross section, opening of the front bulging portion is prevented. Thus, the strength against the frontal collision load can be further enhanced.
　また本発明の第４の特徴によれば、サイドシル部の車幅方向内側の開口部をインナーサイドパネルで閉塞して閉断面に構成したので、サイドシル部の開口部の口開きを防止して前突荷重に対する強度を更に高めることができる。 Further, according to the fourth feature of the present invention, since the opening in the vehicle width direction inner side of the side sill is closed by the inner side panel to form a closed cross section, the opening of the side sill is prevented from opening. The strength against bumping can be further enhanced.
　また本発明の第５の特徴によれば、フロアパネル部の前部の車幅方向両側部から下方に膨出する三角形状の下方膨出部を備え、下方膨出部の車幅方向内側の稜線はフロントサイドフレームの車幅方向内面とサイドシル部の車幅方向内面とを接続するので、フロントサイドフレームに入力した前突荷重を下方膨出部の強度の高い稜線を介してサイドシル部に効率的に伝達することができる。 Further, according to a fifth feature of the present invention, a triangular downward bulging portion bulging downward from both side portions in the vehicle width direction of the front portion of the floor panel portion is provided. The ridge line connects the inner surface of the front side frame in the width direction of the vehicle to the inner surface of the side sill in the width direction. Therefore, the front collision load input to the front side frame is efficiently delivered to the side sill through the high strength ridge of the downward bulging portion. Can be transmitted.
　また本発明の第６の特徴によれば、フロアパネル部の下方膨出部をインナーフロアパネルで閉塞して閉断面に構成したので、下方膨出部の口開きを防止してフロントサイドフレームからサイドシル部への荷重伝達を一層確実に行わせることができる。 Further, according to the sixth feature of the present invention, since the lower bulging portion of the floor panel portion is closed by the inner floor panel to form a closed cross section, opening of the lower bulging portion is prevented and the front side frame is Load transfer to the side sill portion can be performed more reliably.
図１は繊維強化樹脂製の自動車のキャビンの斜視図である。（第１の実施の形態）FIG. 1 is a perspective view of a cabin of a fiber-reinforced resin automobile. First Embodiment 図２は図１の２方向矢視図である。（第１の実施の形態）FIG. 2 is a view in the direction of arrows in FIG. First Embodiment 図３は図２の３方向矢視図である。（第１の実施の形態）FIG. 3 is a view in the direction of arrows in FIG. First Embodiment 図４は図２の４方向矢視図である。（第１の実施の形態）FIG. 4 is a view in the direction of four arrows in FIG. First Embodiment 図５は図１の５－５線断面図である。（第１の実施の形態）FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. First Embodiment 図６は図１の６－６線断面図である。（第１の実施の形態）6 is a cross-sectional view taken along line 6-6 of FIG. First Embodiment
１１　　　　キャビン
１２　　　　フロアパネル部
１２ｃ　　　稜線
１３　　　　サイドシル部
１４　　　　フロント壁部
１５　　　　リヤ壁部
１６　　　　インナーサイドパネル
１７　　　　インナーフロアパネル
２１　　　　ホイールハウス部
２２　　　　下方膨出部
２４　　　　前方膨出部
２６　　　　フロントサイドフレーム 11 cabin 12 floor panel portion 12 c ridge line 13 side sill portion 14 front wall portion 15 rear wall portion 16 inner side panel 17 inner floor panel 21 inner floor panel 21 wheel house portion 22 downward bulging portion 24 front bulging portion 26 front side frame
　以下、図１～図６に基づいて本発明の実施の形態を説明する。 Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 6.
第１の実施の形態First embodiment
　図１に示すように、カーボン繊維強化樹脂（ＣＦＲＰ）で構成した自動車のキャビン１１は、フロアパネル部１２と、フロアパネル部１２の左右両側縁に沿って前後方向に延びる一対のサイドシル部１３，１３と、左右のサイドシル部１３，１３の前端間を接続するようにフロアパネル部１２の前端から起立するフロント壁部１４と、左右のサイドシル部１３，１３の後端間を接続するようにフロアパネ部１２の後端から起立するリヤ壁部１５とを有し、全体としてバスタブ状に形成される。フロアパネル部１２は車幅方向に延びるキックアップ部１２ａを挟んで前部に対して後部が一段高くなっており、前部の車幅方向中央部には前後方向に延びてフロント壁部１４およびキックアップ部１２ａを接続するフロアトンネル部１２ｂが形成される。 As shown in FIG. 1, a cabin 11 of a car made of carbon fiber reinforced resin (CFRP) includes a floor panel 12 and a pair of side sills 13 extending in the front-rear direction along the left and right side edges of the floor panel 12. 13 and a front panel 14 rising from the front end of the floor panel 12 to connect between the front ends of the left and right side sills 13 and 13 and a floor panel so as to connect between the rear ends of the left and right side sills 13 and 13 It has a rear wall portion 15 standing up from the rear end of the portion 12, and is formed in a bathtub shape as a whole. The floor panel portion 12 is raised one step higher at the rear with respect to the front with the kick-up portion 12a extending in the vehicle width direction, and extends in the front-rear direction at the center in the vehicle width direction at the front. A floor tunnel portion 12b connecting the kickup portion 12a is formed.
　キャビン１１の本体部は、カーボンの連続繊維の織布よりなるシートを成形型の成形面に沿うように樹脂で固めて成形する、いわゆる「ハンドレイアップ」の手法で成形される。「ハンドレイアップ」の手法では閉断面の部材を成形できないため、繊維強化樹脂部製の左右一対のインナーサイドパネル１６，１６と、繊維強化樹脂部製の左右一対のインナーフロントパネル１７，１７とを別部材で構成して結合することで、強度の高い閉断面部分を構成する。 The main body portion of the cabin 11 is formed by a so-called "hand lay-up" method in which a sheet made of a woven fabric of continuous carbon fibers is solidified with a resin along a forming surface of a forming die. Since the member of closed cross section can not be formed by the method of "hand lay up", a pair of left and right inner side panels 16, 16 made of fiber reinforced resin, and a pair of left and right inner front panels 17, 17 made of fiber reinforced resin. By forming a separate member and connecting them, a high strength closed cross-section portion is configured.
　即ち、キャビン１１の左右のサイドシル部１３，１３と、サイドシル部１３，１３の前端から上方に延びてフロント壁部１４の車幅方向両端に連なる左右一対のフロントピラーロア部１８，１８とは、車幅方向内向きに開口するコ字状断面を有しているが、その開口部に左右一対の前記インナーサイドパネル１６，１６を接着あるいは溶着とリベット１９…との併用によって結合することで閉断面に構成される（図５および図６参照）。 That is, the left and right side sills 13, 13 of the cabin 11, and the pair of left and right front pillar lowers 18, 18 extending upward from the front ends of the side sills 13, 13 and connected to both ends of the front wall 14 in the vehicle width direction are It has a U-shaped cross-section opening inward in the vehicle width direction, but it is closed by bonding the left and right pair of inner side panels 16, 16 to the opening by bonding or by using welding and rivet 19 together. Configured in cross section (see FIGS. 5 and 6).
　フロントピラーロア部１８，１８とフロント壁部１４との間には、前輪２０，２０の後部外周を覆う左右一対のホイールハウス部２１，２１が設けられる（図１、図２および図６参照）。ホイールハウス部２１，２１は強度の高いハニカムパネルで構成される。ハニカムパネルは、例えばアルミニウム製のコア材をＣＦＲＰ製の２枚のシート間にサンドイッチしたものである。 Between the front pillar lower portions 18, 18 and the front wall portion 14, a pair of left and right wheel house portions 21, 21 covering the rear outer periphery of the front wheels 20, 20 are provided (see FIGS. 1, 2 and 6). . The wheel house parts 21 and 21 are formed of high strength honeycomb panels. The honeycomb panel is obtained by sandwiching a core material made of, for example, aluminum between two sheets made of CFRP.
　フロアパネル部１２の前部の車幅方向両端部には、サイドシル部１３，１３の車幅方向内縁と、フロント壁部１４の下縁と、車幅方向および前後方向に対して傾斜した稜線１２ｃとに囲まれた直角三角形状の下方膨出部２２，２２が下向きに膨出する（図３～図５参照）。下方膨出部２２，２２は上向きに開口するが、その開口部を前記インナーフロントパネル１７，１７をフロアパネル部１２に接着あるいは溶着とリベット２３…との併用によって結合することで閉断面に構成される。下方膨出部２２，２２の内部空間はサイドシル部１３，１３の内部空間に連通しており、サイドシル部１３，１３および下方膨出部２２，２２は相互に連通して閉断面を構成する（図５参照）。インナーフロントパネル１７，１７の前部はフロアパネル部１２から前方に延び、ホイールハウス部２１およびフロント壁部１４に結合される。 At both ends in the vehicle width direction of the front of the floor panel portion 12, ridge lines 12c inclined with respect to the vehicle width direction inner edge of the side sills 13, 13 and the lower edge of the front wall portion 14 with respect to the vehicle width direction and the front and rear direction And the lower bulging portions 22, 22 in the shape of a right triangle are bulging downward (see FIGS. 3 to 5). The lower bulging portion 22, 22 is opened upward, but the opening is formed into a closed cross section by bonding or bonding the inner front panel 17, 17 to the floor panel 12 by welding or using a combination of a rivet 23. Be done. The inner spaces of the lower bulging parts 22, 22 communicate with the inner spaces of the side sills 13, 13, and the side sill parts 13, 13 and the lower bulging parts 22, 22 communicate with each other to form a closed cross section ( See Figure 5). The front portions of the inner front panels 17, 17 extend forward from the floor panel 12 and are connected to the wheel house 21 and the front wall 14.
　フロント壁部１４の前面から左右一対の前方膨出部２４，２４が前方に突出しており、その先端にそれぞれ金属製のジョイント２５，２５がインサートされる（図２～図４および図６参照）。前方膨出部２４の後端はフロント壁部１４に開口するが、その開口部が前記インナーフロントパネル１７によって閉塞される（図６参照）。金属製のジョイント２５，２５には、左右一対の金属製のフロントサイドフレーム２６，２６の後端がボルト２７…で結合される。 A pair of left and right forward bulging parts 24, 24 project forward from the front face of the front wall part 14, and metal joints 25, 25 are respectively inserted at their tips (see FIGS. 2 to 4 and 6) . The rear end of the front bulging portion 24 is open to the front wall portion 14, but the opening is closed by the inner front panel 17 (see FIG. 6). The rear ends of a pair of left and right metal front side frames 26, 26 are joined to the metal joints 25, 25 by bolts 27.
　次に、上記構成を備えた本発明の実施の形態の作用を説明する。 Next, the operation of the embodiment of the present invention having the above configuration will be described.
　図４に示すように、自動車の前面衝突により後退する前輪２０からホイールハウス部２１に衝突荷重Ｆ１が入力されると、ホイールハウス部２１は強度の高いハニカム板で構成されているので、前記衝突荷重Ｆ１はホイールハウス部２１からサイドシル部１３の前端に効率的に伝達され、閉断面構造を備えた強度の高いサイドシル部１３において吸収される。 As shown in FIG. 4, when a collision load F1 is input from the front wheel 20 to the rear of the vehicle due to a frontal collision of the vehicle to the wheel house 21, the wheel house 21 is made of a high strength honeycomb plate. The load F1 is efficiently transmitted from the wheel house 21 to the front end of the side sill 13, and is absorbed by the high strength side sill 13 having a closed cross-sectional structure.
　また自動車の前面衝突によりフロントサイドフレーム２６に入力した衝突荷重の一部Ｆ２は、フロントサイドフレーム２６の車幅方向外面側からホイールハウス部２１の前端に入力され、そこから強度の高いハニカム板で構成されたホイールハウス部２１に沿ってサイドシル部１３の前端に伝達されて吸収される。このとき、フロントサイドフレーム２６の後端の車幅方向外面はホイールハウス部２１の前端の車幅方向外面に連続するので、フロントサイドフレーム２６の車幅方向外面からホイールハウス部２１に入力した前突荷重を効率的にサイドシル部１３に伝達することができる。また前記衝突荷重の他の一部Ｆ３は、フロントサイドフレーム２６の車幅方向内面側からフロアパネル部１２の下方膨出部２２の強度の高い稜線１２ｃに沿って斜め後方に伝達され、サイドシル部１３の車幅方向内側面に伝達されて吸収される。 In addition, a part F2 of the collision load input to the front side frame 26 due to a frontal collision of the car is input from the outer side of the front side frame 26 in the vehicle width direction to the front end of the wheel house 21 and a honeycomb plate with high strength It is transmitted to the front end of the side sill portion 13 along the configured wheel house portion 21 and absorbed. At this time, since the outer surface in the vehicle width direction of the rear end of the front side frame 26 is continuous with the outer surface in the vehicle width direction of the front end of the wheel house portion 21, the front is input to the wheel house portion 21 from the outer surface in the vehicle width direction of the front side frame 26 The bump load can be efficiently transmitted to the side sill portion 13. Further, the other part F3 of the collision load is transmitted diagonally backward from the inner surface side in the vehicle width direction of the front side frame 26 along the high ridgeline 12c of the downward bulging part 22 of the floor panel 12, and the side sill part It is transmitted to and absorbed by the inner surface of the vehicle in the vehicle width direction.
　以上のように、自動車の前面衝突の衝突荷重Ｆ１，Ｆ２，Ｆ３は、強度の高いハニカム板で構成されたホイールハウス部２１，２１と、強度の高い下方膨出部２２，２２の稜線１２ｃ，１２ｃとによってサイドシル部１３，１３に伝達されて吸収される。その結果、前輪２０，２０の衝撃吸収ストロークを増加させて前突荷重を吸収する必要がなくなり、前輪２０，２０をホイールハウス部２１，２１に接近させて車体の全長を短縮することができる。 As described above, the collision loads F1, F2 and F3 of the frontal collision of the car are the ridgelines 12c of the wheel house parts 21 and 21 formed of a high strength honeycomb plate and the high strength lower bulging parts 22 and 22, It is transmitted to the side sills 13, 13 by 12c and absorbed. As a result, it is not necessary to increase the impact absorption stroke of the front wheels 20, 20 to absorb the front collision load, and the front wheels 20, 20 can be made closer to the wheel house portions 21, 21, thereby shortening the overall length of the vehicle body.
　また衝突荷重の伝達経路に存在する前方膨出部２４，２４の後端はフロント壁部１４の後面に開口しているが、その開口部をインナーフロアパネル１７，１７で閉塞して閉断面に構成したので、前方膨出部２４，２４の口開きを防止して前突荷重に対する強度を更に高めることができる。更に、衝突荷重の伝達経路に存在する下方膨出部２２，２２は上面が開口しているが、その開口部をインナーフロアパネル１７，１７で閉塞して閉断面に構成したので、下方膨出部２２，２２の口開きを防止して前突荷重に対する強度を更に高めることができる。更にまた、サイドシル部１３，１３の車幅方向内側の開口部をインナーサイドパネル１６，１６で閉塞して閉断面に構成したので、サイドシル部１３，１３の開口部の口開きを防止して前突荷重に対する強度を更に高めることができる。 The rear ends of the forward bulging portions 24 and 24 present in the transmission path of the collision load are open at the rear surface of the front wall portion 14, but the opening is closed by the inner floor panels 17 and 17 to form a closed cross section. Since it comprised, the opening difference of the front bulging part 24 and 24 can be prevented, and the intensity | strength with respect to front collision load can be raised further. Furthermore, although the upper surface of the lower bulging portion 22, 22 present in the transmission path of the collision load is open, the opening is closed by the inner floor panels 17, 17 to form a closed cross section. The opening of the portions 22, 22 can be prevented to further enhance the strength against the front collision load. Furthermore, since the inner side panels 16 and 16 close the openings at the inner side in the vehicle width direction of the side sills 13 and 13 to form a closed cross section, the opening of the side sills 13 and 13 is prevented from opening. The strength against bumping can be further enhanced.
　以上、本発明の実施の形態を説明したが、本発明はその要旨を逸脱しない範囲で種々の設計変更を行うことが可能である。 As mentioned above, although embodiment of this invention was described, this invention can perform various design changes in the range which does not deviate from the summary.
　例えば、繊維強化樹脂はカーボン繊維強化樹脂に限定されるものではない。 For example, fiber reinforced resin is not limited to carbon fiber reinforced resin.
　また実施の形態ではキャビン１１をハンドレイアップで成形しているが、樹脂の射出成形やプリプレグのプレス成形等の他の任意の手法で成形することができる。 Moreover, although the cabin 11 is shape | molded by hand layup in embodiment, it can shape | mold by other arbitrary methods, such as injection molding of resin, and press molding of a prepreg.

Claims (6)

  1. 　フロアパネル部（１２）と、前記フロアパネル部（１２）の前端から起立するフロント壁部（１４）と、前記フロアパネル部（１２）の後端から起立するリヤ壁部（１５）と、前記フロアパネル部（１２）の車幅方向両端から起立する左右のサイドシル部（１３）とを有するバスタブ状のキャビン（１１）を繊維強化樹脂製のシートから成形した自動車の車体構造であって、
    　左右のフロントサイドフレーム（２６）の後端を支持する左右の前方膨出部（２４）を前記フロント壁部（１４）から前方に膨出させるとともに、前記前方膨出部（２４）の後端から前記フロントサイドフレーム（２６）の前端へと連続するホイールハウス部（２１）をハニカムパネルで構成したことを特徴とする自動車の車体構造。     A floor panel (12), a front wall (14) standing upright from the front end of the floor panel (12), a rear wall (15) standing upright from the rear end of the floor panel (12); It is a car body structure of an automobile, in which a bathtub-like cabin (11) having left and right side sills (13) standing from both ends in the vehicle width direction of the floor panel (12) is formed from a sheet made of fiber reinforced resin
    The left and right front bulging parts (24) supporting the rear ends of the left and right front side frames (26) are bulging forward from the front wall part (14), and the rear end of the front bulging part (24) A vehicle body structure of an automobile, wherein a wheel house (21) continuous from the front side frame (26) to the front end of the front side frame (26) is formed of a honeycomb panel.
  2. 　前記ホイールハウス部（２１）の前端の車幅方向外面は、前記フロントサイドフレーム（２６）の後端の車幅方向外面に連続することを特徴とする、請求項１に記載の自動車の車体構造。 The vehicle body structure of an automobile according to claim 1, wherein a vehicle width direction outer surface of a front end of the wheel house portion (21) is continuous with a vehicle width direction outer surface of a rear end of the front side frame (26). .
  3. 　前記前方膨出部（２４）が前記フロント壁部（１４）に開口する開口部をインナーフロアパネル（１７）で閉塞して閉断面に構成したことを特徴とする、請求項１または請求項２に記載の自動車の車体構造。 The opening portion which the front bulging portion (24) opens in the front wall portion (14) is closed by an inner floor panel (17) to form a closed cross section. Body structure of the car described in.
  4. 　前記サイドシル部（１３）の車幅方向内側の開口部をインナーサイドパネル（１６）で閉塞して閉断面に構成したことを特徴とする、請求項１～請求項３の何れか１項に記載の自動車の車体構造。 The opening portion inside the vehicle width direction of the side sill portion (13) is closed by an inner side panel (16) to form a closed cross section, according to any one of claims 1 to 3, Car body structure.
  5. 　前記フロアパネル部（１２）の前部の車幅方向両側部から下方に膨出する三角形状の下方膨出部（２２）を備え、前記下方膨出部（２２）の車幅方向内側の稜線（１２ｃ）は前記フロントサイドフレーム（２６）の車幅方向内面と前記サイドシル部（１３）の車幅方向内面とを接続することを特徴とする、請求項３に記載の自動車の車体構造。 A ridge-shaped downward bulging portion (22) bulging downward from both sides in the vehicle width direction of the front portion of the floor panel portion (12), and a ridge line on the inner side in the vehicle width direction of the lower bulging portion The vehicle body structure of an automobile according to claim 3, wherein (12c) connects the inner surface in the vehicle width direction of the front side frame (26) and the inner surface in the vehicle width direction of the side sill portion (13).
  6. 　前記フロアパネル部（１２）の前記下方膨出部（２２）を前記インナーフロアパネル（１７）で閉塞して閉断面に構成したことを特徴とする、請求項５に記載の自動車の車体構造。 The vehicle body structure of an automobile according to claim 5, characterized in that the lower bulging portion (22) of the floor panel portion (12) is closed by the inner floor panel (17) to form a closed cross section.
PCT/JP2012/082633 2012-01-06 2012-12-17 Vehicle body structure for automobile WO2013103081A1 (en)

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CN105882766A (en) * 2014-12-15 2016-08-24 金华职业技术学院 Passenger vehicle cab floor reinforcing plate and floor assembly
JP2018070084A (en) * 2016-11-04 2018-05-10 本田技研工業株式会社 Auto body structure

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