JP2005067268A - Vehicle body front structure of cab-over vehicle - Google Patents

Vehicle body front structure of cab-over vehicle Download PDF

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JP2005067268A
JP2005067268A JP2003295952A JP2003295952A JP2005067268A JP 2005067268 A JP2005067268 A JP 2005067268A JP 2003295952 A JP2003295952 A JP 2003295952A JP 2003295952 A JP2003295952 A JP 2003295952A JP 2005067268 A JP2005067268 A JP 2005067268A
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vehicle
cab
horizontal
toe board
collision
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JP4069833B2 (en
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Kimito Koyanagi
公人 小柳
Akihiro Miwa
明宏 三輪
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Toyota Auto Body Co Ltd
トヨタ車体株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body front structure of a cab-over vehicle for efficiently securing a compartment space of a cab, especially a foot space of an occupant at collision of a vehicle. <P>SOLUTION: An upper bumper member 2 provided with an inclined part 2a standing from its top intermediate part toward an upper front part at a gradual inclined posture, and a horizontal part 2b extending forward in parallel to a front side member 1 from its front end is installed to the front side member 1 extending in parallel to a forward and backward direction of a cab-over vehicle, and the inclined part 2a is coupled with a bottom face of a toeboard part 30 at a front end of a cab floor 3, and designed to support the toeboard part 30. The horizontal part 2b is made to project forward from a compartment space blocked by a dash panel 4 standing from a front edge of the toeboard part 30, and the front end of the inclined part 2a of the upper member 2 is bridged with the front member 1 immediately under the end in a forward and backward direction. There is provided with a connecting member 5 for restraining the inclined part 2a of the upper member 2 from breaking at collision of the vehicle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明はキャブオーバー型車の車体前部構造に関する。   The present invention relates to a vehicle body front structure of a cab over type vehicle.
従来、キャブオーバー型車の車体前部構造には、特許文献1に開示されたように、車両前後方向に延びる左右のフロントサイドメンバの前端に車両衝突時に軸方向に圧縮変形して衝撃を吸収する衝撃吸収部が設けられ、かつ、フロントサイドメンバに、後端がフロントサイドメンバの上面中間部に結合されて前方かつ上方へ延出するアッパメンバが設けられ、車両前面衝突時に、上記フロントサイドメンバの衝撃吸収部で衝撃を吸収するとともに、上記アッパメンバが突っ張って車室空間を確保する構造としたものがある。   Conventionally, as disclosed in Patent Document 1, the front body structure of a cab-over type vehicle absorbs an impact by compressing and deforming in the axial direction at the front end of the left and right front side members extending in the vehicle longitudinal direction. And an upper member that extends forward and upward with the rear end coupled to the middle portion of the upper surface of the front side member. There is a structure in which a shock absorber is used to absorb a shock and the upper member is stretched to secure a vehicle compartment space.
また、この種の車体前部構造では、より確実に車室空間を確保するために、アッパメンバの前端に衝撃吸収部を設けることが考えられる。その代表例を図5に示し、フロントサイドメンバ1の前端には、前方をダッシュパネル4で仕切られた車室空間よりも前方へ突出する位置に、衝撃吸収部1bを備えている。アッパメンバ2は、フロントサイドメンバ1の上面中間部から前方かつ上方へ向けて緩やかな傾斜姿勢で立ち上がる傾斜部2aと、傾斜部2aの前端からフロントサイドメンバ1と平行に前方へ延びる水平部2bとを備えている。アッパメンバ2の傾斜部2aはキャブフロア3前端のトーボード部30下面に結合して、トーボード部30を下方より支える。アッパメンバ2の水平部2bは、フロントサイドメンバ1の前端と同様の衝撃吸収部としている。   Further, in this type of vehicle body front structure, it is conceivable to provide an impact absorbing portion at the front end of the upper member in order to ensure the vehicle interior space more reliably. A representative example is shown in FIG. 5, and the front end of the front side member 1 is provided with an impact absorbing portion 1 b at a position protruding forward from the vehicle compartment space partitioned forward by the dash panel 4. The upper member 2 includes an inclined portion 2a that rises forward and upward from a middle portion of the upper surface of the front side member 1, and a horizontal portion 2b that extends forward in parallel with the front side member 1 from the front end of the inclined portion 2a. It has. The inclined part 2a of the upper member 2 is coupled to the lower surface of the toe board part 30 at the front end of the cab floor 3 to support the toe board part 30 from below. The horizontal portion 2 b of the upper member 2 is an impact absorbing portion similar to the front end of the front side member 1.
上記構造とすることにより、車両前面衝突時、フロントサイドメンバ1およびアッパメンバ2は、上記ダッシュパネル4よりも前方位置で、それぞれの衝撃吸収部1b、2bが共に軸方向に圧縮変形して衝撃を吸収し、ダッシュパネル4およびトーボード30の後方への移動量や変形量を抑制して車室空間を確保することができる。
特公昭54−24166号公報
With the above structure, at the time of a vehicle front collision, the front side member 1 and the upper member 2 are both in front of the dash panel 4 and the impact absorbing portions 1b and 2b are both compressed and deformed in the axial direction to receive an impact. The vehicle interior space can be secured by absorbing and suppressing the amount of rearward movement and deformation of the dash panel 4 and the toe board 30.
Japanese Patent Publication No.54-24166
しかしながら、従来構造では、車両のオフセット衝突時など、一方の側のフロントサイドメンバ1およびアッパメンバ2に大きな衝突荷重が作用したとき、図6に示すように、フロントサイドメンバ1ではその衝撃吸収部1bが軸方向に圧縮変形して衝撃を吸収するものの、アッパメンバ2では、その水平部2bが、衝突荷重を受けて一旦、軸方向に圧縮変形し始めるが、水平部2bを支える傾斜部2aでは後端のフロントサイドメンバ1との結合部を中心に傾斜部2aを押し上げようとする回転力が作用して、該回転力により傾斜部2aがその中間部から上方へ折れるおそれがある。傾斜部2aが折れると、水平部2bでの衝撃吸収が確実に行われず、キャブフロア3のトーボード部30およびダッシュパネル4の後方への移動変形量が大きくなってキャブの車室空間、特に乗員の足元空間を確保することが困難になる。   However, in the conventional structure, when a large collision load is applied to the front side member 1 and the upper member 2 on one side, such as during an offset collision of the vehicle, the front side member 1 has its shock absorbing portion 1b as shown in FIG. However, in the upper member 2, the horizontal portion 2 b of the upper member 2 starts to compress and deform in the axial direction once under the impact load, but the rear portion of the inclined portion 2 a that supports the horizontal portion 2 b. A rotational force that pushes up the inclined portion 2a acts around the connecting portion with the front side member 1 at the end, and the inclined portion 2a may be bent upward from the intermediate portion by the rotational force. When the inclined portion 2a is bent, the shock absorption at the horizontal portion 2b is not reliably performed, and the rearward movement deformation amount of the toe board portion 30 and the dash panel 4 of the cab floor 3 is increased, so that the cabin space of the cab, particularly the occupant It becomes difficult to secure the foot space.
そこで本発明は、フロントサイドメンバおよびアッパメンバに大きな衝突荷重が作用しても、両メンバの前端が確実に軸方向に圧縮変形して効率良く衝撃を吸収することができ、ダッシュパネルおよびキャブフロアのトーボードの後方への移動変形量を抑制してキャブの車室空間を確実に確保できるキャブオーバー型車の車体前部構造を提供することを課題としてなされたものである。   Therefore, according to the present invention, even when a large collision load is applied to the front side member and the upper member, the front ends of both members can be reliably compressed and deformed in the axial direction to efficiently absorb the impact, and the dash panel and the cab floor An object of the present invention is to provide a vehicle body front structure of a cab-over type vehicle that can reliably secure a cabin space of the cab by suppressing the amount of rearward deformation of the toe board.
本発明は、キャブオーバー型車の車体前後方向に水平に延びるフロントサイドメンバに、その上面中間部から前方かつ上方へ向けて緩やかな傾斜姿勢で立ち上がる傾斜部と、該傾斜部の前端から上記フロントサイドメンバと平行に前方へ延びる水平部とを備えたアッパメンバを設け、上記アッパメンバの傾斜部をキャブフロア前端のトーボード部下面に結合して上記傾斜部により上記トーボード部を支えるようになし、かつ上記水平部を、トーボード部前端縁から起立するダッシュパネルにより仕切られた車室空間よりも前方へ突出せしめたキャブオーバー型車の車体前部構造において、上記アッパメンバの傾斜部の前端と、その直下の上記フロントサイドメンバとを上下方向に架けわたす連結部材を設ける(請求項1)。これによれば、車両衝突時に上記アッパメンバの傾斜部に上方への回転力が作用しても、フロントサイドメンバとアッパメンバとを連結する連結部材によってアッパメンバの傾斜部の上下方向の折れが抑制される。従って、キャブフロアのトーボード部やダッシュパネルの後方への移動変形量が大きくならず、キャブの車室空間を確実に確保することができる。   The present invention provides a front side member that extends horizontally in the longitudinal direction of a cab-over type vehicle on a front side member, an inclined portion that rises from a middle portion of the upper surface forward and upward in a moderately inclined posture, and the front portion from the front end of the inclined portion. An upper member provided with a horizontal portion extending in parallel to the side member, the inclined portion of the upper member is coupled to the lower surface of the toe board portion at the front end of the cab floor, and the toe board portion is supported by the inclined portion; and In the vehicle body front structure of a cab-over type vehicle in which the horizontal portion protrudes forward from the passenger compartment space partitioned by the dash panel rising from the front edge of the toe board portion, the front end of the inclined portion of the upper member, A connecting member is provided to hang the front side member in the vertical direction. According to this, even if an upward rotational force acts on the inclined portion of the upper member at the time of a vehicle collision, the connecting member that connects the front side member and the upper member suppresses the vertical folding of the inclined portion of the upper member. . Therefore, the rearward movement deformation amount of the toe board portion and the dash panel of the cab floor does not increase, and the cabin space of the cab can be reliably ensured.
上記フロントサイドメンバの前端部および上記アッパメンバの水平部を、車両衝突時に軸方向に圧縮変形して衝撃を吸収する衝撃吸収部とし、上記フロントサイドメンバおよびアッパメンバの両衝撃吸収部の直後位置に、上記連結部材を架けわたす(請求項2)。車両衝突時、アッパメンバは傾斜部が変形しないのでアッパメンバの衝撃吸収部を確実に軸方向に圧縮変形させることができ、フロントサイドメンバの衝撃吸収部とで相互に効率よく衝撃を吸収させることができる。   The front end portion of the front side member and the horizontal portion of the upper member are shock absorbing portions that absorb the shock by compressing and deforming in the axial direction at the time of a vehicle collision, and are positioned immediately after both the shock absorbing portions of the front side member and the upper member. The connecting member is bridged (claim 2). In the event of a vehicle collision, since the inclined portion of the upper member is not deformed, the shock absorbing portion of the upper member can be reliably compressed and deformed in the axial direction, and the shock can be efficiently absorbed with the shock absorbing portion of the front side member. .
本発明によれば、キャブオーバー型車のフロントサイドメンバとアッパメンバ間にこれらを上下方向に架けわたす連結部材を設けたから、車両衝突時に、フロントサイドメンバおよびアッパメンバに大きな衝突荷重が作用しても、アッパメンバの傾斜部が上下方向で折れることなく、両メンバの前端が軸方向に圧縮変形して衝撃を吸収することができ、キャブのダッシュパネルおよびキャブフロアのトーボードの後方への移動変形量を抑制してキャブの車室空間、特に乗員の足元空間を確実かつ十分に確保することができる。またアッパメンバは傾斜部で折れないから、その前端に設けた衝撃吸収部は確実に軸方向に圧縮変形して効率よく衝撃を吸収する。   According to the present invention, since the connecting member is provided between the front side member and the upper member of the cab over type vehicle so as to hang them up and down, even when a large collision load acts on the front side member and the upper member at the time of a vehicle collision, Without tilting the upper member in the vertical direction, the front ends of both members can be compressed and deformed in the axial direction to absorb shocks, reducing the amount of rearward deformation of the cab dash panel and cab floor toeboard. Thus, the cabin space of the cab, particularly the foot space of the occupant can be secured reliably and sufficiently. Further, since the upper member does not break at the inclined portion, the shock absorbing portion provided at the front end thereof is reliably compressed and deformed in the axial direction to efficiently absorb the shock.
図1ないし図4に基づいて本発明の実施形態を説明する。図1(A)に示すように、キャブオーバー型車の車体前部には、キャブのキャブフロア3の下方位置に、キャブを支える車体の骨格部材たる左右のフロントサイドメンバ1が車体前後方向に延設してある。尚、キャブフロア3は、前後中間位置に前下がり傾斜状の段差が設けてあり、フロア前半部を、フロントシートSが設置されるフロア後半部よりも一段低くして、フロア前半部でフロントシートSに着座する乗員の足元のトーボード部30を形成している。上記フロア後半部の床下には、エンジンルームおよびホイールハウスのスペースが確保されている。また、トーボード部の前縁には、キャブ内の車室空間の前壁を形成する縦壁状のダッシュパネル4が立設してある。   An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 (A), at the front of the cab-over type vehicle body, left and right front side members 1 that are skeleton members of the vehicle body that supports the cab are disposed in the vehicle longitudinal direction at a position below the cab floor 3 of the cab. It is extended. The cab floor 3 is provided with a step-down inclined step at the front and rear intermediate position. The front half of the floor is one step lower than the rear half of the floor on which the front seat S is installed, and the front seat is located at the front half of the floor. A toe board portion 30 is formed at the feet of the occupant seated in S. A space for an engine room and a wheel house is secured under the floor in the latter half of the floor. In addition, a vertical wall-shaped dash panel 4 that forms the front wall of the cabin space in the cab is erected on the front edge of the toe board portion.
左右のフロントサイドメンバ1は同一構造で、一方のフロントサイドメンバ1を中心に説明する。図1(A),(B)に示すように、フロントサイドメンバ1は、断面ほぼU字形をなすメンバ本体11と、その上部開口を塞ぐアッパプレート12からなる閉断面構造をなす。キャブフロア3直下のフロントサイドメンバ1の一般部1aは、その内部に長手方向に沿って閉断面を上下に仕切るリィンフォースメント13を内設して剛性が強化してある。   The left and right front side members 1 have the same structure, and one front side member 1 will be mainly described. As shown in FIGS. 1A and 1B, the front side member 1 has a closed cross-sectional structure including a member main body 11 having a substantially U-shaped cross section and an upper plate 12 that closes the upper opening. The general portion 1a of the front side member 1 directly below the cab floor 3 is provided with a reinforcement 13 that divides the closed cross section vertically along the longitudinal direction, thereby enhancing the rigidity.
図1(A)および図3に示すように、上記ダッシュパネル4よりも車体前方へ延出するフロントサイドメンバ1の前端部は、側面および下面に前後方向に所定の間隔をおいて複数のクラッシュビード14を設け、車両衝突時に軸方向に圧縮変形して衝撃を吸収する衝撃吸収部1bとしてある。   As shown in FIG. 1A and FIG. 3, the front end portion of the front side member 1 extending forward of the vehicle body from the dash panel 4 has a plurality of crashes at predetermined intervals in the front-rear direction on the side surface and the lower surface. The bead 14 is provided as an impact absorbing portion 1b that compresses and deforms in the axial direction and absorbs an impact when the vehicle collides.
フロントサイドメンバ1の前端末には、車幅方向に沿って左右のメンバ1を架けわたすフロントクロスメンバ6が設けてあり、該フロントクロスメンバ6はバンパーリィンフォースメントを兼ね、これによりフロントバンパーBを支えるようにしている。図1(A)の16は、フロントサイドメンバ1の中間部側面に設けられ、前輪のサスペンションを支持するアッパーコントロールアームブラケットである。   The front terminal of the front side member 1 is provided with a front cross member 6 that spans the left and right members 1 along the vehicle width direction. The front cross member 6 also serves as a bumper reinforcement. I try to support it. Reference numeral 16 in FIG. 1A denotes an upper control arm bracket that is provided on the side surface of the intermediate portion of the front side member 1 and supports the suspension of the front wheels.
フロントサイドメンバ1には前方かつ上方へ分岐するアッパメンバ2が設けてある。アッパメンバ2は、その後端20をフロントサイドメンバ1の前後方向の中間部に結合して、該結合部から上方かつ前方へ向かって緩やかな傾斜姿勢で立ち上がる傾斜部2aと、傾斜部2aの前端から屈折してフロントサイドメンバ1前端の衝撃吸収部1bと平行に前方へ延びる水平部2bを備えている。アッパメンバ2の前端末はフロントサイドメンバ1の前端末と揃えてある。   The front side member 1 is provided with an upper member 2 that branches forward and upward. The upper member 2 has a rear end 20 coupled to an intermediate portion in the front-rear direction of the front side member 1, an inclined portion 2a that rises upward and forward from the coupled portion, and a front end of the inclined portion 2a. A horizontal portion 2b that refracts and extends forward in parallel with the shock absorbing portion 1b at the front end of the front side member 1 is provided. The front terminal of the upper member 2 is aligned with the front terminal of the front side member 1.
図2に示すように、アッパメンバ2の後端20は、断面ほぼU字形をなすメンバ本体21の上部開口を、アッパプレート22で塞いだ閉断面構造をなす。後端20は、フロントサイドメンバ1の前後中間位置で、一部、そのアッパプレート12を設けずに開断面構造とした部位のメンバ本体11内へその上方から嵌入し、アッパメンバ2の後端20の左右の側面をフロントサイドメンバ1の内面に重ね合わせて溶接固定してある。   As shown in FIG. 2, the rear end 20 of the upper member 2 has a closed cross-sectional structure in which the upper opening of the member main body 21 having a substantially U-shaped cross section is closed by the upper plate 22. The rear end 20 is partly inserted into the member main body 11 of the portion having an open cross-sectional structure without providing the upper plate 12 from the front and rear intermediate positions of the front side member 1, and the rear end 20 of the upper member 2. The left and right side surfaces are overlapped with the inner surface of the front side member 1 and fixed by welding.
図1(B)に示すように、アッパメンバ2の傾斜部2aでは、メンバ本体21が断面逆ハット形に形成してあり、左右の側縁フランジをキャブフロア3のトーボード部30の下面に重合溶接してトーボード部30とで閉断面構造を形成している。   As shown in FIG. 1B, in the inclined portion 2 a of the upper member 2, the member main body 21 is formed in an inverted hat shape in cross section, and the left and right side edge flanges are superposed on the lower surface of the toe board portion 30 of the cab floor 3. Thus, the toe board portion 30 forms a closed cross-sectional structure.
アッパメンバ2の水平部2bは、図3に示すように、メンバ本体21とアッパプレート22とで閉断面構造としてある。そして、フロントサイドメンバ1の衝撃吸収部1bと同様、側面および下面に前後方向に所定の間隔をおいて複数のクラッシュビード23が設けてあり、車両衝突時に軸方向に圧縮変形して衝撃を吸収する衝撃吸収部としてある。   As shown in FIG. 3, the horizontal portion 2 b of the upper member 2 has a closed cross-sectional structure with a member main body 21 and an upper plate 22. Similar to the shock absorbing portion 1b of the front side member 1, a plurality of crush beads 23 are provided on the side surface and the lower surface with a predetermined interval in the front-rear direction, and the impact is absorbed by compressive deformation in the axial direction at the time of a vehicle collision. It is as a shock absorbing part.
アッパメンバ2の前端末には、フロントサイドメンバ1と同様、車幅方向に沿って左右のメンバ2を架けわたすフロントクロスメンバ6aが設けてあり、フロントサイドメンバ1のフロントクロスメンバ6と同様にフロントバンパーBを支えるようにしている。   The front end of the upper member 2 is provided with a front cross member 6a that spans the left and right members 2 along the vehicle width direction, like the front side member 1, and the front bumper is the same as the front cross member 6 of the front side member 1. B is supported.
このように構成したフロントサイドメンバ1とアッパメンバ2との間には、図1(A),(B)に示すように、両メンバ1,2の衝撃吸部1b,2bの直後の位置で、キャブフロア3のトーボード部30前縁に対応するアッパメンバ2の傾斜部2aの前端と、その直下のフロントサイドメンバ1の一般部1aの前端との間に上下方向に連結部材5が架けわたしてある。連結部材5は、強度が高い板厚2.6mmの帯状の鋼板で構成してあり、連結部材5の横幅は約30mmとしてある。連結部材5の上下の両端部は、中間部に対して若干広幅に形成してあり、両端部の中央にはボルト貫通孔が形成してある。   Between the front side member 1 and the upper member 2 configured in this way, as shown in FIGS. 1A and 1B, at positions immediately after the impact absorbing portions 1b and 2b of both members 1 and 2, Between the front end of the inclined portion 2a of the upper member 2 corresponding to the front edge of the toe board portion 30 of the cab floor 3 and the front end of the general portion 1a of the front side member 1 immediately below the connecting member 5 is extended vertically. . The connecting member 5 is made of a strip-shaped steel plate having a high thickness of 2.6 mm, and the connecting member 5 has a lateral width of about 30 mm. The upper and lower ends of the connecting member 5 are formed to be slightly wider than the intermediate portion, and a bolt through hole is formed at the center of both ends.
連結部材5は、その上端部をアッパメンバ2の傾斜部2a前端の外側面に重ね合わせ、上記ボルト貫通孔に貫通せしめたボルト部材51を、傾斜部2a前端の外側面に形成された内部にウェルドナットを有するネジ孔に締結する一方、連結部材5の下端部をフロントサイドメンバ1の一般部1a前端の外側面に重ね合わせ、下端部のボルト貫通孔を介して一般部1aのネジ孔にボルト部材51を締結することにより固定してある。   The connecting member 5 has an upper end overlapped with an outer surface of the front end of the inclined portion 2a of the upper member 2, and a bolt member 51 penetrated through the bolt through hole is welded to the inside formed on the outer surface of the front end of the inclined portion 2a. While fastening to the screw hole having a nut, the lower end portion of the connecting member 5 is overlapped with the outer surface of the front end of the general portion 1a of the front side member 1, and the bolt is connected to the screw hole of the general portion 1a through the bolt through hole in the lower end portion. The member 51 is fixed by fastening.
本実施形態によれば、車両のオフセット衝突時等、フロントバンパーBを介して、一方の側のフロントサイドメンバ1およびアッパメンバ2に大きな衝突荷重が作用すると、図4に示すように、フロントサイドメンバ1では、バリヤーDと一般部1aとの間で、衝撃吸収部1bが軸方向に圧縮変形して衝撃を吸収する。アッパメンバ2では、バリヤーDと傾斜部2aとの間で、水平部(衝撃吸収部)2bが軸方向に圧縮変形し始めるとともに、水平部2bを支える傾斜部2aにはその前端を押し上げようとする回転力が作用するが、傾斜部2aの前端は連結部材5により剛性の高いフロントサイドメンバ1と上下方向に連結されているから、傾斜部2a前端の上記移動変形が抑制される。これにより、水平部2bが確実に軸方向に圧縮変形して効率よく衝撃を吸収する。衝突荷重の大きさによっては、傾斜部2a前端が若干軸方向に圧縮変形するが、従来構造のように傾斜部2aが上方かつ後方へ折れることはない。従って、アッパメンバ2の傾斜部2aにより支えられたキャブフロア3のトーボード部30やダッシュパネル4の後方への移動変形量も、従来構造に比べて遙に小さくなり、キャブの車室空間、特に乗員の足元の空間を十分に確保することができる。   According to the present embodiment, when a large collision load acts on the front side member 1 and the upper member 2 on one side via the front bumper B, such as at the time of an offset collision of the vehicle, as shown in FIG. Then, between the barrier D and the general part 1a, the shock absorbing part 1b compresses and deforms in the axial direction to absorb the shock. In the upper member 2, the horizontal portion (impact absorbing portion) 2b starts to compress and deform in the axial direction between the barrier D and the inclined portion 2a, and the front end of the inclined portion 2a supporting the horizontal portion 2b is pushed up. Although the rotational force acts, the front end of the inclined portion 2a is connected to the rigid front side member 1 in the vertical direction by the connecting member 5, so that the above-described movement deformation of the front end of the inclined portion 2a is suppressed. Thereby, the horizontal part 2b reliably compresses and deforms in the axial direction and efficiently absorbs the impact. Depending on the magnitude of the collision load, the front end of the inclined portion 2a is slightly compressed and deformed in the axial direction, but the inclined portion 2a does not bend upward and rearward as in the conventional structure. Accordingly, the rearward deformation amount of the toe board portion 30 and the dash panel 4 of the cab floor 3 supported by the inclined portion 2a of the upper member 2 is much smaller than that of the conventional structure, and the cabin space of the cab, particularly the occupant A sufficient space can be secured at the feet.
従来構造の車両と、本実施形態を適用した車両とをそれぞれ時速64kmで実験用のオフセットデフォーマブルバリヤーに衝突させる衝突実験を行った結果、従来構造では足元空間へのバリヤー浸入量が約270mmだったのに対し、本実施形態では約230mmに減少した。   As a result of a collision experiment in which a vehicle having a conventional structure and a vehicle to which this embodiment is applied collide with an experimental offset deformable barrier at a speed of 64 km / h, the barrier intrusion into the foot space is about 270 mm in the conventional structure. On the other hand, in this embodiment, it decreased to about 230 mm.
上述の実施形態では、連結部材5を鋼板で構成したが、これに限らず、引っ張り荷重に対する強度の高いワイヤ部材としてもよい。   In the above-mentioned embodiment, although the connection member 5 was comprised with the steel plate, it is good not only as this but a wire member with high intensity | strength with respect to a tensile load.
図1(A)は本発明を適用した車体前部構造の概略側面図、図1(B)は図1(A)のIB−IB線に沿う縦断面図である。1A is a schematic side view of a vehicle body front structure to which the present invention is applied, and FIG. 1B is a longitudinal sectional view taken along line IB-IB in FIG. 1A. 図1(A)のII−II線に沿う縦断面図である。It is a longitudinal cross-sectional view which follows the II-II line | wire of FIG. 1 (A). 図1(A)のIII −III 線に沿う縦断面図である。It is a longitudinal cross-sectional view which follows the III-III line | wire of FIG. 1 (A). 本発明の車体前部構造の衝突後の状態を示す概略側面図である。It is a schematic side view which shows the state after the collision of the vehicle body front part structure of this invention. 従来の車体前部構造の概略側面図である。It is a schematic side view of the conventional vehicle body front part structure. 従来の車体前部構造の衝突後の状態を示す概略側面図である。It is a schematic side view which shows the state after the collision of the conventional vehicle body front part structure.
符号の説明Explanation of symbols
1 フロントサイドメンバ
1b 前端部(衝撃吸収部)
2 アッパメンバ
2a 傾斜部
2b 水平部(衝撃吸収部)
3 キャブフロア
30 トーボード部
4 ダッシュパネル
5 連結部材
1 Front side member 1b Front end (shock absorbing part)
2 Upper member 2a Inclined part 2b Horizontal part (shock absorbing part)
3 Cab floor 30 Toe board part 4 Dash panel 5 Connecting member

Claims (2)

  1. キャブオーバー型車の車体前後方向に水平に延びるフロントサイドメンバに、その上面中間部から前方かつ上方へ向けて緩やかな傾斜姿勢で立ち上がる傾斜部と、該傾斜部の前端から上記フロントサイドメンバと平行に前方へ延びる水平部とを備えたアッパメンバを設け、上記アッパメンバの傾斜部をキャブフロア前端のトーボード部下面に結合して上記傾斜部により上記トーボード部を支えるようになし、かつ上記水平部を、トーボード部前端縁から起立するダッシュパネルにより仕切られた車室空間よりも前方へ突出せしめたキャブオーバー型車の車体前部構造において、
    上記アッパメンバの傾斜部の前端と、その直下の上記フロントサイドメンバとを上下方向に架けわたす連結部材を設け、該連結部材により、車両衝突時に上記アッパメンバの傾斜部が上下方向で折れることを抑制するようになしたキャブオーバー型車の車体前部構造。
    A front side member that extends horizontally in the longitudinal direction of the body of a cab-over type vehicle, an inclined portion that rises in a gently inclined posture from the middle of the upper surface to the front and upward, and parallel to the front side member from the front end of the inclined portion An upper member having a horizontal portion extending forward is provided, the inclined portion of the upper member is coupled to the lower surface of the toe board portion at the front end of the cab floor, and the toe board portion is supported by the inclined portion, and the horizontal portion is In the vehicle body front structure of a cab-over type car that protrudes forward from the cabin space partitioned by a dash panel that stands up from the front edge of the toe board part,
    A connecting member is provided to vertically extend the front end of the inclined portion of the upper member and the front side member immediately below the upper member, and the connecting member suppresses the inclined portion of the upper member from being bent in the vertical direction at the time of a vehicle collision. The front structure of the cab-over type car body.
  2. 上記フロントサイドメンバの前端部および上記アッパメンバの水平部を、車両衝突時に軸方向に圧縮変形して衝撃を吸収する衝撃吸収部とし、上記フロントサイドメンバおよびアッパメンバの両衝撃吸収部の直後位置に、上記連結部材を架けわたした請求項1に記載のキャブオーバー型車の車体前部構造。   The front end portion of the front side member and the horizontal portion of the upper member are shock absorbing portions that absorb the shock by compressing and deforming in the axial direction at the time of a vehicle collision, and are positioned immediately after both the shock absorbing portions of the front side member and the upper member. The front body structure of a cab-over type vehicle according to claim 1, wherein the connecting member is mounted.
JP2003295952A 2003-08-05 2003-08-20 Front body structure of cab-over type car Active JP4069833B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006111311A1 (en) * 2005-04-22 2006-10-26 Daimlerchrysler Ag Collision-protected front frame structure of a truck
JP2008543663A (en) * 2005-06-22 2008-12-04 ダイムラー・アクチェンゲゼルシャフト Car
JP2013184587A (en) * 2012-03-08 2013-09-19 Daihatsu Motor Co Ltd Vehicle front structure

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JPH11134720A (en) 1997-08-28 1999-05-21 Matsushita Electric Ind Co Ltd Optical information recording medium and its recording/ reproducing method
US6343062B1 (en) 1997-09-26 2002-01-29 Matsushita Electric Industrial Co., Ltd Optical disk device and optical disk for recording and reproducing high-density signals
TW448443B (en) 1998-08-05 2001-08-01 Matsushita Electric Ind Co Ltd Optical information storage media and production method as well as the storage reproducing method and device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006111311A1 (en) * 2005-04-22 2006-10-26 Daimlerchrysler Ag Collision-protected front frame structure of a truck
JP2008543663A (en) * 2005-06-22 2008-12-04 ダイムラー・アクチェンゲゼルシャフト Car
JP2013184587A (en) * 2012-03-08 2013-09-19 Daihatsu Motor Co Ltd Vehicle front structure

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