JP2013112162A - Mount structure for dash cross member in vehicle front body - Google Patents

Mount structure for dash cross member in vehicle front body Download PDF

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JP2013112162A
JP2013112162A JP2011260158A JP2011260158A JP2013112162A JP 2013112162 A JP2013112162 A JP 2013112162A JP 2011260158 A JP2011260158 A JP 2011260158A JP 2011260158 A JP2011260158 A JP 2011260158A JP 2013112162 A JP2013112162 A JP 2013112162A
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dash
cross member
panel
dash cross
dash panel
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JP2011260158A
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JP5928869B2 (en
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Daisuke Furumoto
大輔 古本
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Suzuki Motor Corp
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Suzuki Motor Corp
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Priority to JP2011260158A priority Critical patent/JP5928869B2/en
Priority to DE102012111166.9A priority patent/DE102012111166B4/en
Priority to CN201210501935.9A priority patent/CN103129623B/en
Publication of JP2013112162A publication Critical patent/JP2013112162A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—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
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
    • B62D25/2045—Floors or bottom sub-units in connection with other superstructure subunits the subunits being fire walls

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

Abstract

PROBLEM TO BE SOLVED: To provide a mount structure for a dash cross member in a vehicle front body in which a burden onto a floor side member is reduced by efficiently distributing a load on a floor tunnel and a degree of freedom in layout can be secured since the dash cross member does not interfere with an engine, its piping, pedals or a steering shaft.SOLUTION: A dash cross member 12 disposed between front side members 5 in a vehicle width direction is divided into three portions which are both side portions 121 and a central portion 122. Both the side portions 121 are bonded to the side of a front face 4F of a dash panel 4, and outer ends 121c of both the side portions 121 are tilted to the front side of a vehicle body and bonded to the front side members 5, respectively. The central portion 122 is bonded to the side of a rear face 4R of the dash panel 4 and the connecting part of both the side portions 121 and the central portion 122 of the dash cross member 12 is formed in such a manner that the cross section of the connecting part of the central portion 122 and both the side portions 121 is continued over the front and rear faces of the dash panel 4.

Description

本発明は、車体前部におけるダッシュクロスメンバの取付構造に関する。   The present invention relates to a structure for attaching a dash cross member at a front portion of a vehicle body.

車体前部にエンジンルームを備えた自動車では、エンジンルームと車室内とをダッシュパネルによって仕切り、このダッシュパネルの両側にダッシュサイドパネルが設けられている。ダッシュパネルの下部は、車室床面を画成するフロアパネルに接合され、ダッシュパネルの下部中央には、フロアパネルの車幅方向の中央部分に車体の前後方向に上方に向けて突出するフロアトンネルが設けられている。エンジンルームの両側には通常、フロントサイドメンバが設けられ、このフロントサイドメンバに連続するフロアサイドメンバがフロアパネル下面側に配設されている。そして、ダッシュパネル部分の補強のためにダッシュクロスメンバが車幅方向に配設されている（例えば、特許文献１〜７）。   In an automobile having an engine room at the front of the vehicle body, the engine room and the vehicle interior are partitioned by a dash panel, and dash side panels are provided on both sides of the dash panel. The lower part of the dash panel is joined to the floor panel that defines the passenger compartment floor, and the center of the lower part of the dash panel protrudes upward in the longitudinal direction of the vehicle body at the center of the floor panel in the vehicle width direction. There is a tunnel. A front side member is usually provided on both sides of the engine room, and a floor side member continuous with the front side member is disposed on the lower surface side of the floor panel. And the dash cross member is arrange | positioned in the vehicle width direction for reinforcement of a dash panel part (for example, patent documents 1-7).

特開２０１０−２６４９０６号公報JP 2010-264906 A 特開２０１０−６１５４号公報JP 2010-6154 A 特開２００８−１６８６８７号公報JP 2008-168687 A 特開２００５−２０６１０８号公報JP-A-2005-206108 特開平９−１０９９２８号公報Japanese Patent Laid-Open No. 9-109928 特開２００２−３６２４１９号公報JP 2002-362419 A 特開２００８−６８８２６号公報JP 2008-68826 A

従来技術によると、前方からバンパに荷重がかかる場合、フロントサイドメンバを経由して、フロアサイドメンバおよびサイドシルへの経路の他に、ダッシュパネルからダッシュクロスメンバに伝わりフロアトンネルに伝達される経路も荷重分散している。このため、フロアトンネルへの荷重分散を増やしてフロアサイドメンバへの負担を軽くするには、ダッシュクロスメンバの剛性向上（閉断面積増加や板厚増加）が必要になり、周辺レイアウトへの圧迫と重量増加が懸念される。   According to the prior art, when a load is applied to the bumper from the front, in addition to the route to the floor side member and side sill via the front side member, there is also a route transmitted from the dash panel to the dash cross member and transmitted to the floor tunnel. The load is distributed. For this reason, in order to increase the load distribution to the floor tunnel and lighten the burden on the floor side member, it is necessary to improve the rigidity of the dash cross member (increase in the closed cross-sectional area and increase in the plate thickness) and press the surrounding layout. There is a concern about weight increase.

また、エンジンルームと車室内を隔離するダッシュパネルは、振動騒音を遮蔽する役割を持つ。このダッシュパネル単品を剛性向上するためには、全体を凸曲面に成形したり、板厚増加が考えられるが、周辺レイアウトへの圧迫と重量増加が懸念される。さらに、局所的な凹凸形状はプレスの絞り深さが深くなり、成形性が悪化する。   The dash panel that separates the engine room from the vehicle compartment serves to shield vibration noise. In order to improve the rigidity of this single dash panel, it is possible to form the whole into a convex curved surface or increase the plate thickness. However, there is a concern about pressure on the peripheral layout and an increase in weight. Furthermore, the local uneven shape increases the drawing depth of the press and deteriorates the moldability.

またさらに、ダッシュパネル前面には、エンジンおよびエンジンの配管が隣接しており、配管レイアウトの自由度を確保するには空間自由度を必要とする。エンジンおよびエンジンの配管のためにダッシュパネルを逃がす形状とすると、ダッシュパネルの形状が複雑になり、剛性の低下も懸念される。また、局所的な凹凸形状はプレスの絞り深さが深くなり、成形性が悪化する。ダッシュクロスメンバがある場合は、ダッシュクロスメンバの前後への膨らみ分も周辺レイアウトから回避する必要があり、更にダッシュパネルの形状が複雑になる。   Furthermore, the engine and the engine piping are adjacent to the front surface of the dash panel, and a degree of freedom in space is required to secure the degree of freedom in the piping layout. If the shape of the dash panel is made to escape for the engine and the piping of the engine, the shape of the dash panel becomes complicated, and there is a concern about a decrease in rigidity. Moreover, the local uneven | corrugated shape becomes deep in the drawing depth of a press, and a moldability deteriorates. When there is a dash cross member, it is necessary to avoid the bulge of the dash cross member before and after from the peripheral layout, and the shape of the dash panel becomes more complicated.

さらに、ダッシュパネル後面には、運転席のペダル類やステアリングシャフト貫通穴が設けられており、ペダル類やステアリングシャフトレイアウトの自由度を確保するには空間自由度を必要とする。このペダル類レイアウトのためにダッシュパネルを逃がす形状とすると、ダッシュパネルの形状が複雑になり、剛性の低下も懸念される。また、ダッシュクロスメンバがある場合は、ダッシュクロスメンバの前後への膨らみ分も周辺レイアウトから回避する必要があり、更にダッシュパネルの形状が複雑になる。これにより、局所的な凹凸形状、プレスの絞り深さが深くなり、成形性が悪化する。   Furthermore, the rear surface of the dash panel is provided with pedals for the driver's seat and a steering shaft through hole, and a degree of freedom in space is required to ensure the degree of freedom of the pedals and the steering shaft layout. If the shape of the dash panel is made to escape due to the pedal layout, the shape of the dash panel becomes complicated, and there is a concern that the rigidity may be lowered. In addition, when there is a dash cross member, it is necessary to avoid the bulge of the dash cross member before and after from the peripheral layout, and the shape of the dash panel becomes more complicated. Thereby, local uneven | corrugated shape and the drawing depth of a press become deep, and a moldability deteriorates.

本発明は、上記課題を解決し、フロアトンネルに荷重を効率的に分散してフロアサイドメンバに対する負担を軽減し、エンジンおよびその配管、ペダル類あるいはステアリングシャフト等と干渉しないので、レイアウトの自由度を確保することができる車体前部におけるダッシュクロスメンバの取付構造を提供することを目的とする。   The present invention solves the above-mentioned problems, reduces the burden on the floor side member by efficiently distributing the load to the floor tunnel, and does not interfere with the engine and its piping, pedals or steering shaft, etc. It is an object of the present invention to provide a dash cross member mounting structure in a front portion of a vehicle body capable of ensuring the above.

本発明は、上記課題を解決するため、車室前部を仕切るダッシュパネルと、このダッシュパネルから前方に延びる左右一対のフロントサイドメンバと、前記ダッシュパネルに連続して車室の下面を形成するフロアパネルと、このフロアパネルの車幅方向の中央部分を車室内側に膨出させることにより車体の前後方向に形成されたフロアトンネル部とを備えた車体前部におけるダッシュクロスメンバの取付構造であって、前記フロントサイドメンバ相互間に車幅方向に配設されるダッシュクロスメンバを両側部分と中央部分とに３分割し、前記両側部分を前記ダッシュパネルの前面側に接合するとともに、これら両側部分の外側端部を車体前方側に傾斜させて、それぞれ前記フロントサイドメンバに接合し、前記中央部分を上記ダッシュパネルの後面側に接合するとともに該中央部分と前記両側部分の接続部の断面が前記ダッシュパネルの前後面で連続するように前記ダッシュクロスメンバの両側部分と中央部分の接続部を形成したことにある。   In order to solve the above-mentioned problems, the present invention forms a dash panel that partitions the front part of the passenger compartment, a pair of left and right front side members that extend forward from the dash panel, and a lower surface of the passenger compartment that is continuous with the dash panel. A dash cross member mounting structure in the front part of the vehicle body comprising a floor panel and a floor tunnel part formed in the longitudinal direction of the vehicle body by bulging the center part of the floor panel in the vehicle width direction toward the vehicle interior side. A dash cross member disposed in the vehicle width direction between the front side members is divided into a side part and a center part, and the both side parts are joined to the front side of the dash panel. The outer end of the part is inclined to the front side of the vehicle body and joined to the front side member respectively, and the central part is connected to the dash panel. Together joined to the rear side in the cross section of the connecting portion of the side portions and the central portion to form a connecting portion of both side portions and the central portion of the dash cross member so as to continue with the front and rear surfaces of the dash panel.

また、本発明は、前記ダッシュクロスメンバの中央部分の上下フランジを介して前記ダッシュパネルの後面側に接合するとともに、該ダッシュクロスメンバの中央部分の下側フランジを前記フロアトンネル部の前端に設けられた前端フランジとともに前記ダッシュパネルの後面に３枚重ねで接合したことにある。
さらに、本発明は、前記ダッシュクロスメンバの両側部分を前記フロントサイドメンバとの接合部からほぼ水平に車幅方向に延設し、前記ダッシュパネルを挟んで前記ダッシュクロスメンバの両側部分と中央部分とで形成する閉断面の中心線は曲率半径の大きな曲線となり、前記ダッシュクロスメンバの両側部分を前記ダッシュパネルの車体後方に折れ曲がる上下の折れ線に重なる位置に接合したことにある。
またさらに、本発明は、前記ダッシュクロスメンバの中央部分に合わせて前記ダッシュパネルの後面を車室内側に突出させて形成し、この突出部に沿って前記ダッシュクロスメンバの中央部分を車室内側に湾曲させて形成したことにある。 In addition, the present invention is joined to the rear surface side of the dash panel through the upper and lower flanges of the center portion of the dash cross member, and the lower flange of the center portion of the dash cross member is provided at the front end of the floor tunnel portion. It is that it was joined on the rear surface of the dash panel in a stacked manner together with the front end flange.
Further, according to the present invention, both side portions of the dash cross member extend substantially horizontally from the joint portion with the front side member in the vehicle width direction, and both side portions and the center portion of the dash cross member are sandwiched between the dash panels. The center line of the closed cross section formed by the curve is a curve with a large radius of curvature, and the both side portions of the dash cross member are joined at positions overlapping the upper and lower fold lines that bend rearward of the dash panel.
Still further, the present invention is such that the rear surface of the dash panel is formed so as to protrude toward the vehicle interior side in accordance with the central portion of the dash cross member, and the central portion of the dash cross member extends along the protruding portion to the vehicle interior side. This is because it is formed to be curved.

本発明によれば、次のような効果を奏することができる。
フロントサイドメンバ相互間に車幅方向に配設されるダッシュクロスメンバを両側部分と中央部分とに３分割し、前記両側部分をダッシュパネルの前面側に接合するとともに、これら両側部分の外側端部を車体前方側に傾斜させて、それぞれ前記フロントサイドメンバに接合し、前記中央部分を前記ダッシュパネルの後面側に接合するとともに該中央部分と前記両側部分の接続部の断面が前記ダッシュパネルの前後面で連続するように前記ダッシュクロスメンバの両側部分と中央部分の接続部を形成したので、フロントサイドメンバに加わる荷重は、ダッシュクロスメンバの両側部分からダッシュパネルの後面側の中央部分へと伝わりフロアトンネル部に伝達することができる。前記ダッシュクロスメンバは、両側部分の外側が前方に突出し、中央部分が車体後方に突出しているので、フロントサイドメンバに加わる荷重をフロアトンネル部を通して車体後方に伝達しやすくなり、ダッシュパネルの構成は単純なままにできることから、荷重の分散とダッシュパネルの剛性の確保を図ることができる。ダッシュクロスメンバの中央部分は、エンジンおよびエンジンの配管と干渉しないので、レイアウトの自由度を確保することができる。ダッシュクロスメンバの両側部分は、ペダル類やステアリングシャフト等と干渉しないので、レイアウトの自由度を確保することができる。前方からの大きな荷重で、エンジン等がダッシュパネルに向けて後退するとき、ダッシュクロスメンバの中央部分と、後方のフロアトンネル部の構造で、荷重を受け止めることができる。 According to the present invention, the following effects can be achieved.
The dash cross member disposed in the vehicle width direction between the front side members is divided into three parts, a side part and a center part, and the both side parts are joined to the front side of the dash panel, and the outer end parts of these side parts Are inclined to the front side of the vehicle body and joined to the front side members, respectively, and the central portion is joined to the rear surface side of the dash panel, and the cross section of the connecting portion between the central portion and the both side portions is the front and rear of the dash panel. Since the connecting portion between the both side portions and the central portion of the dash cross member is formed so as to be continuous on the surface, the load applied to the front side member is transmitted from the both side portions of the dash cross member to the central portion on the rear surface side of the dash panel. It can be transmitted to the floor tunnel. The dash cross member protrudes forward on the outside of both side portions and the central portion protrudes rearward of the vehicle body, so that it is easy to transmit the load applied to the front side member to the rear of the vehicle body through the floor tunnel portion. Since it can be kept simple, the load distribution and the rigidity of the dash panel can be ensured. Since the central portion of the dash cross member does not interfere with the engine and the engine piping, the degree of freedom in layout can be ensured. Since both side portions of the dash cross member do not interfere with the pedals, the steering shaft, etc., the degree of freedom in layout can be secured. When the engine or the like retreats toward the dash panel with a large load from the front, the load can be received by the structure of the center portion of the dash cross member and the rear floor tunnel portion.

また、ダッシュクロスメンバの中央部分の上下フランジを介してダッシュパネルの後面側に接合するとともに、該ダッシュクロスメンバの中央部分の下側フランジをフロアトンネル部の前端に設けられた前端フランジとともに前記ダッシュパネルの後面に３枚重ねで接合したので、フロアトンネル部への荷重分散が確実に行われる。
さらに、前記ダッシュクロスメンバの両側部分を前記フロントサイドメンバとの接合部からほぼ水平に車幅方向に延設し、前記ダッシュパネルを挟んで前記ダッシュクロスメンバの両側部分と中央部分とで形成する閉断面の中心線は曲率半径の大きな曲線となり、前記ダッシュクロスメンバの両側部分を前記ダッシュパネルの車体後方に折れ曲がる上下の折れ線に重なる位置に接合したので、局所的な剛性のばらつきがなく、荷重の伝達効率が良くなる。
またさらに、ダッシュクロスメンバの中央部分に合わせてダッシュパネルの後面を車室内側に突出させて形成し、この突出部に沿ってダッシュクロスメンバの中央部分を車室内側に湾曲させて形成したので、フロアトンネル部へ効率良く荷重を伝えることができる。ダッシュパネルの後面を車室内側に突出させて形成するので、ダッシュパネルの面剛性を向上することができる。 The dash cross member is joined to the rear surface side of the dash panel via the upper and lower flanges of the center portion of the dash cross member, and the lower flange of the center portion of the dash cross member is connected to the dash panel together with the front end flange provided at the front end of the floor tunnel portion. Since the three panels are joined to the rear surface of the panel, load distribution to the floor tunnel portion is ensured.
Further, both side portions of the dash cross member extend in a vehicle width direction substantially horizontally from a joint portion with the front side member, and are formed by both side portions and a central portion of the dash cross member with the dash panel interposed therebetween. The center line of the closed cross section is a curve with a large radius of curvature, and both side portions of the dash cross member are joined at positions overlapping the upper and lower fold lines that bend to the rear of the vehicle body of the dash panel. The transmission efficiency is improved.
Furthermore, the rear surface of the dash panel is formed so as to protrude toward the vehicle interior side in accordance with the central portion of the dash cross member, and the central portion of the dash cross member is curved along the protrusion portion toward the vehicle interior side. The load can be transmitted efficiently to the floor tunnel. Since the rear surface of the dash panel protrudes toward the vehicle interior side, the surface rigidity of the dash panel can be improved.

本発明の実施の形態による車体前部におけるダッシュクロスメンバの取付構造を示す車体後方から見た斜視図である。It is the perspective view seen from the vehicle body rear which shows the attachment structure of the dash cross member in the vehicle body front part by embodiment of this invention. 図１の車体前方から見た斜視図である。It is the perspective view seen from the vehicle body front of FIG. 図１のダッシュパネルを車室内側から見た正面図である。It is the front view which looked at the dash panel of FIG. 1 from the vehicle interior side. 図２のダッシュパネルを車体前方から見た正面図である。It is the front view which looked at the dash panel of FIG. 2 from the vehicle body front. 図３の平面図である。FIG. 4 is a plan view of FIG. 3. （ａ）は図４のＡ−Ａ線断面図である。（ｂ）は図３のＢ−Ｂ線断面図である。(A) is the sectional view on the AA line of FIG. (B) is the BB sectional drawing of FIG.

以下、本発明の実施の形態を、図面を参照しながら詳細に説明する。
図１ないし図６は、本発明の実施の形態による車体前部におけるダッシュクロスメンバの取付構造を示したものである。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 6 show a dash cross member mounting structure in a front portion of a vehicle body according to an embodiment of the present invention.

本発明の実施の形態による車両は、図１ないし図６に示すように、車体１前部の構造が、車室前部をエンジンルーム２と車室３内とに仕切るダッシュパネル４と、このダッシュパネル４から前方に延びる左右一対のフロントサイドメンバ５と、前記ダッシュパネル４に連続して車室３の下面を形成するフロアパネル６と、このフロアパネル６の車幅方向の中央部分に車室３内側に膨出させることにより車体１の前後方向に形成された横断面ハット形のフロアトンネル部７とを備えて構成されている。   As shown in FIGS. 1 to 6, the vehicle according to the embodiment of the present invention has a dash panel 4 in which the structure of the front portion of the vehicle body 1 divides the front portion of the vehicle compartment into an engine room 2 and a vehicle interior 3. A pair of left and right front side members 5 that extend forward from the dash panel 4, a floor panel 6 that forms a lower surface of the vehicle compartment 3 continuously to the dash panel 4, and a vehicle in the center of the floor panel 6 in the vehicle width direction. A floor tunnel portion 7 having a hat-shaped cross section formed in the front-rear direction of the vehicle body 1 by bulging inside the chamber 3 is configured.

ダッシュパネル４は上部側４ａを略垂直の壁面に形成し、下部側４ｂを後方に向けて斜め下方の斜面に形成しており、その先を前記フロアパネル６に接合している。このダッシュパネル４の両側部にはダッシュサイドパネル８が接合されて車室３内側壁面が形成され、ダッシュパネル４とダッシュサイドパネル８の下部側相互間には、外側にホイールハウス９を形成する湾曲面９ａが室内側に膨出して形成されている。ダッシュサイドパネル８の下端部には、前記フロアパネル６の外側フランジ部が接合されるサイドシル部１０が車体後方に向けて設けられている。   The dash panel 4 has an upper side 4a formed on a substantially vertical wall surface, and a lower side 4b formed rearward on a slanting lower slope, and the tip thereof is joined to the floor panel 6. A dash side panel 8 is joined to both sides of the dash panel 4 to form an inner wall surface of the passenger compartment 3, and a wheel house 9 is formed outside between the dash panel 4 and the lower side of the dash side panel 8. A curved surface 9a is formed to bulge indoors. A side sill portion 10 to which the outer flange portion of the floor panel 6 is joined is provided at the lower end portion of the dash side panel 8 toward the rear of the vehicle body.

前記左右一対のフロントサイドメンバ５の後端部には、前記フロアパネル６の下面側に車体前後方向に配設される左右一対のフロアサイドメンバ１１の前端が接合されている。このフロントサイドメンバ５は、後端部５ａが下方向に湾曲するとともにダッシュサイドパネル８の下端部を通過してフロアサイドメンバ１１の前端部に接合されている。前記フロントサイドメンバ５相互間には、両端部側面をダッシュパネル４の前面に接合されたダッシュクロスメンバ１２が設けられている。   The rear ends of the pair of left and right front side members 5 are joined to the front ends of a pair of left and right floor side members 11 disposed in the vehicle longitudinal direction on the lower surface side of the floor panel 6. The front side member 5 is joined to the front end portion of the floor side member 11 through the lower end portion of the dash side panel 8 while the rear end portion 5a is curved downward. Between the front side members 5, a dash cross member 12 having both side surfaces joined to the front surface of the dash panel 4 is provided.

ダッシュクロスメンバ１２は、両側部分１２１と中央部分１２２とに３分割されて形成されており、両側部分１２１を前記ダッシュパネル４の前面４Ｆ側に接合するとともに中央部分１２２を前記ダッシュパネル４の後面４Ｒ側に接合して、該中央部分１２ｂと前記両側部分１２１の各接続部の断面が前記ダッシュパネル４の前後面で連続するように構成されている。ダッシュクロスメンバ１２の両側部分１２１と中央部分１２２は、図６（ａ）（ｂ）に示すように上下方向断面が略ハット形の断面に形成されており、これら両側部分１２１と中央部分１２２は、上下のフランジ部１２１ａ，１２１ｂ，１２２ａ，１２２ｂを介して前記ダッシュパネル４の前後面４Ｆ，４Ｒに接合されている。前記両側部分１２１は前記ダッシュパネル４の前面４Ｆ側に上下のフランジ部１２１ａ，１２１ｂを介して接合されるとともに、これら両側部分１２１の外側端部１２１ｃ側を車体前方側に出るように僅かに傾斜させて、それぞれ前記フロントサイドメンバ５の後端部５ａ側および内側面に接合している。   The dash cross member 12 is formed by being divided into three parts, a side part 121 and a central part 122, and the both side parts 121 are joined to the front surface 4 F side of the dash panel 4 and the central part 122 is connected to the rear surface of the dash panel 4. Joining to 4R side, it is comprised so that the cross section of each connection part of this center part 12b and the said both-sides part 121 may continue in the front-and-back surface of the said dash panel 4. As shown in FIG. As shown in FIGS. 6A and 6B, the both side portions 121 and the central portion 122 of the dash cross member 12 are formed in a substantially hat-shaped cross section as shown in FIGS. 6A and 6B. The upper and lower flange portions 121a, 121b, 122a, 122b are joined to the front and rear surfaces 4F, 4R of the dash panel 4. The both side portions 121 are joined to the front surface 4F side of the dash panel 4 through upper and lower flange portions 121a and 121b, and slightly inclined so that the outer end portions 121c side of these both side portions 121 come out to the front side of the vehicle body. Thus, the front side member 5 is joined to the rear end portion 5a side and the inner side surface, respectively.

前記ダッシュパネル４の後面４Ｒ側の中央部には、車室３内側に突出させて形成し、車体後方側に向けて横断面台形状に膨出する突出部４１が設けられており、この突出部４１に沿って前記中央部分１２２は、後方に向けて台形状に突出するように中央の両側の両端部１２２ｃを車体後方に向けて徐々に近づくように傾斜させて形成されている。一方、前記ダッシュパネル４の後面４Ｒ側の突出部４１に対応する前面４Ｆ側の中央部には、突出部４１の裏側の凹部４２が形成されている。
ダッシュクロスメンバ１２の中央部分１２２は、下側フランジ１２２ｂを前記フロアトンネル部７の前端に設けられた前端フランジ７ａとともに前記ダッシュパネル４の後面４Ｒに３枚重ねで接合されている（図６（ｂ）参照）。 A projection 41 is formed at the center of the rear surface 4R side of the dash panel 4 so as to project inside the vehicle compartment 3 and bulge out in a trapezoidal cross section toward the rear of the vehicle body. The central portion 122 is formed along the portion 41 so as to incline so that both end portions 122c on both sides of the center gradually approach toward the rear of the vehicle body so as to protrude in a trapezoidal shape toward the rear. On the other hand, a recess 42 on the back side of the protrusion 41 is formed at the center on the front surface 4F side corresponding to the protrusion 41 on the rear surface 4R side of the dash panel 4.
The center portion 122 of the dash cross member 12 is joined to the rear surface 4R of the dash panel 4 with the lower flange 122b and the front end flange 7a provided at the front end of the floor tunnel portion 7 in a stacked manner (FIG. 6 ( b)).

前記ダッシュクロスメンバ１２の両側部分１２１を前記フロントサイドメンバ５との接合部からほぼ水平に車幅方向に延設して前記凹部４２内の斜面に沿って前記突出部４１の裏側に延設している。前記ダッシュパネル４を挟んで前記ダッシュクロスメンバ１２の両側部分１２１と中央部分１２２とで形成する閉断面の中心線は曲率半径の大きな曲線となるように形成されている。
前記ダッシュクロスメンバ１２の両側部分１２１は、前記フロアトンネル部７の前端フランジ部７ａの接合部に対応する前記ダッシュパネル４の前面４Ｆの凹部４２内の斜面にかけて接合フランジ１２１ａ，１２１ｂを接合し組付けられている。前記ダッシュクロスメンバ１２の両側部分１２１は、前記ダッシュパネル４の車体後方に折れ曲がる上面４ａと下面４ｂの境になる上下の折れ線Ｌに重なる位置に接合している。なお、エンジンルーム２には、エンジン１３およびその配管１４，１５等が配設されており、車室３内には、図示しないハンドルあるいはブレーキおよびアクセル等のペダル類が配設されている。 Both side portions 121 of the dash cross member 12 are extended substantially horizontally from the joint portion with the front side member 5 in the vehicle width direction, and are extended to the back side of the protruding portion 41 along the slope in the recess 42. ing. The center line of the closed cross section formed by the both side portions 121 and the central portion 122 of the dash cross member 12 with the dash panel 4 interposed therebetween is formed to be a curve with a large curvature radius.
The both side portions 121 of the dash cross member 12 are joined by joining flanges 121a and 121b to the slopes in the recesses 42 of the front surface 4F of the dash panel 4 corresponding to the joint portions of the front end flange portion 7a of the floor tunnel portion 7. It is attached. Both side portions 121 of the dash cross member 12 are joined at positions overlapping the upper and lower fold lines L that are the boundary between the upper surface 4a and the lower surface 4b of the dash panel 4 that are bent rearward of the vehicle body. The engine room 2 is provided with an engine 13 and pipes 14 and 15 thereof, and the vehicle compartment 3 is provided with pedals such as a handle or a brake and an accelerator (not shown).

上記実施の形態によると、前方からの衝撃荷重が車体前部に加わった場合、前部両側のフロントサイドメンバ５に衝撃が伝わる。このフロントサイドメンバ５に伝達された衝撃荷重は、フロントサイドメンバ５の基端部からダッシュパネル４に伝わるとともに、フロントサイドメンバ５からダッシュクロスメンバ１２の両側部分１２１に伝達される。ダッシュクロスメンバ１２の両側部分１２１に伝わる荷重は、両側部分１２１の外側端部１２１ｃが前方に突出し、中央部分１２２が車体後方に突出し、両側部分１２１を前記ダッシュパネル４の前面４Ｆ側に接合している。また、ダッシュクロスメンバ１２の中央部分１２２を前記ダッシュパネル４の後面４Ｒ側に接合して、該中央部分１２ｂと前記両側部分１２ａの各接続部の断面が前記ダッシュパネル４の前後面で連続するように構成され、ダッシュクロスメンバ１２の両側部分１２１と中央部分１２２のつながり方が閉断面変化が小さく、あたかも一本のダッシュクロスメンバのように形成されていることから、局所的な剛性のばらつきがなく、荷重がダッシュパネル４の前面４Ｆ側の両側部分１２１からダッシュパネル４の後面４Ｒ側の中央部分１２２へと効率良く伝わり、フロアトンネル部７に伝達することができる。   According to the above embodiment, when an impact load from the front is applied to the front part of the vehicle body, the impact is transmitted to the front side members 5 on both sides of the front part. The impact load transmitted to the front side member 5 is transmitted from the base end portion of the front side member 5 to the dash panel 4 and from the front side member 5 to both side portions 121 of the dash cross member 12. The load transmitted to both side portions 121 of the dash cross member 12 is such that the outer end portion 121c of both side portions 121 protrudes forward, the central portion 122 protrudes rearward of the vehicle body, and both side portions 121 are joined to the front surface 4F side of the dash panel 4. ing. Further, the central portion 122 of the dash cross member 12 is joined to the rear surface 4R side of the dash panel 4, and the cross sections of the connecting portions of the central portion 12b and the both side portions 12a are continuous on the front and rear surfaces of the dash panel 4. Since the closed cross-sectional change is small in the way of connecting the both side portions 121 and the central portion 122 of the dash cross member 12 and it is formed like a single dash cross member, there is local variation in rigidity. Thus, the load is efficiently transmitted from the both side portions 121 on the front surface 4F side of the dash panel 4 to the central portion 122 on the rear surface 4R side of the dash panel 4 and can be transmitted to the floor tunnel portion 7.

したがって、前記ダッシュクロスメンバ１２は、両側部分１２２の外側が前方に突出し、フロントサイドメンバ５に加わる荷重を、フロアトンネル部７を通して車体後方に伝達しやすくなり、ダッシュパネル４の構成は単純なままにできることから、荷重の分散とダッシュパネル４の剛性の確保を図ることができる。ダッシュクロスメンバ１２の中央部分１２２は、エンジンルーム２内のエンジンおよびエンジンの配管と干渉しないので、レイアウトの自由度を確保することができる。ダッシュクロスメンバ１２の両側部分１２１は、ペダル類やステアリングシャフト等と干渉しないので、レイアウトの自由度を確保することができる。前方からの大きな荷重で、エンジン等がダッシュパネル４に向けて後退するとき、ダッシュクロスメンバ１２の中央部分１２２と、後方のフロアトンネル部７の構造で、荷重を受け止めることができる。   Accordingly, the dash cross member 12 protrudes forward at the outer sides of both side portions 122, so that the load applied to the front side member 5 can be easily transmitted to the rear of the vehicle body through the floor tunnel portion 7, and the configuration of the dash panel 4 remains simple. Therefore, the load distribution and the rigidity of the dash panel 4 can be ensured. Since the center portion 122 of the dash cross member 12 does not interfere with the engine in the engine room 2 and the piping of the engine, a degree of freedom in layout can be ensured. Since both side portions 121 of the dash cross member 12 do not interfere with pedals, a steering shaft, and the like, a degree of freedom in layout can be ensured. When the engine or the like retreats toward the dash panel 4 with a large load from the front, the load can be received by the structure of the center portion 122 of the dash cross member 12 and the rear floor tunnel portion 7.

また、ダッシュクロスメンバ１２の中央部分１２２の上下フランジ１２２ａ、１２２ｂを介してダッシュパネル４の後面４Ｒ側に接合するとともに、該ダッシュクロスメンバ１２の中央部分１２２の下側フランジ１２２ｂをフロアトンネル部７の前端に設けられた前端フランジ７ａとともに前記ダッシュパネル４の後面４Ｒに３枚重ねで接合できるので、フロアトンネル部７への荷重分散が確実に行われる。
さらに、ダッシュクロスメンバ１２の両側部分１２１をフロントサイドメンバ５との接合部からほぼ水平に車幅方向に延設し、ダッシュパネル４を挟んで前記ダッシュクロスメンバ１２の両側部分１２１と中央部分１２２とで形成する閉断面の中心線は曲率半径の大きな曲線となり、ダッシュクロスメンバ１２の両側部分１２１をダッシュパネル４の車体後方に折れ曲がる上下の折れ線Ｌに重なる位置に接合したので、局所的な剛性のばらつきがなく、ダッシュパネル４の折れ部周辺は、平面状よりも剛性があり、この折れ部とダッシュクロスメンバ１２の剛性が協働し、真っ直ぐにフロアトンネル部７へと剛性がつながることから、フロントサイドメンバ５に加わる荷重を効率良くフロアトンネル部７へ分散することができる。
またさらに、ダッシュクロスメンバ１２の中央部分１２２に合わせてダッシュパネル４の後面４Ｒを車室３内側に突出させて形成し、この突出部に沿ってダッシュクロスメンバ１２の中央部分１２２を車室３内側に湾曲させて形成したので、フロアトンネル部７へ効率良く荷重を伝えることができる。また、ダッシュパネル４の後面４Ｒを車室３内側に突出させて形成しているので、ダッシュパネル４の面剛性を向上することができる。 The dash cross member 12 is joined to the rear surface 4R side of the dash panel 4 through the upper and lower flanges 122a and 122b of the center portion 122, and the lower flange 122b of the center portion 122 of the dash cross member 12 is connected to the floor tunnel portion 7. Since it can be joined to the rear surface 4R of the dash panel 4 together with the front end flange 7a provided at the front end, the load distribution to the floor tunnel portion 7 is ensured.
Further, both side portions 121 of the dash cross member 12 are extended substantially horizontally from the joint portion with the front side member 5 in the vehicle width direction, and the both side portions 121 and the central portion 122 of the dash cross member 12 are sandwiched between the dash panels 4. The center line of the closed cross section formed by the curve is a curve with a large radius of curvature, and both side portions 121 of the dash cross member 12 are joined at positions overlapping the upper and lower fold lines L that are bent rearward of the vehicle body of the dash panel 4. There is no variation, and the periphery of the folded portion of the dash panel 4 is more rigid than the planar shape, and the rigidity of the folded portion and the dash cross member 12 cooperates, and the rigidity is straightly connected to the floor tunnel portion 7. The load applied to the front side member 5 can be efficiently distributed to the floor tunnel portion 7.
Furthermore, the rear surface 4R of the dash panel 4 is formed so as to protrude inside the vehicle compartment 3 in accordance with the central portion 122 of the dash cross member 12, and the central portion 122 of the dash cross member 12 is formed along the protruding portion. Since it is formed to be curved inward, a load can be efficiently transmitted to the floor tunnel portion 7. Further, since the rear surface 4R of the dash panel 4 is formed so as to protrude toward the inside of the vehicle compartment 3, the surface rigidity of the dash panel 4 can be improved.

なお、本発明は、上記実施の形態のみに限定されるものではなく、例えば、ダッシュクロスメンバ１２は、両側部分１２１と中央部分１２２の３分割に形成し、両側部分１２１はダッシュパネル４の前面４Ｆ側に、中央部分１２２はダッシュパネル４の後面４Ｒ側に接合して、両側部分１２１と中央部分１２２の断面が連続するように形成したが、この接続部分の断面は特に限定されるものではなく、任意の形状で接続することもできる。等、その他、本発明の技術思想に基づいて各種の変形および変更が可能である。   Note that the present invention is not limited to the above-described embodiment. For example, the dash cross member 12 is formed in three parts, that is, a side part 121 and a central part 122, and the both side parts 121 are the front surface of the dash panel 4. On the 4F side, the central portion 122 is joined to the rear surface 4R side of the dash panel 4 so that the cross sections of both side portions 121 and the central portion 122 are continuous. However, the cross section of this connecting portion is not particularly limited. It can also be connected in any shape. In addition, various modifications and changes can be made based on the technical idea of the present invention.

１ 車体
２ エンジンルーム
３ 車室
４ ダッシュパネル
４Ｆ 前面
４Ｒ 後面
５ フロントサイドメンバ
６ フロアパネル
７ フロアトンネル部
８ ダッシュサイドパネル
１１ フロアサイドメンバ
１２ ダッシュクロスメンバ
１２１ 両側部分
１２２ 中央部分
１２１ａ，１２１ｂ，１２２ａ，１２２ｂ フランジ部
１２１ｃ 外側端部 DESCRIPTION OF SYMBOLS 1 Car body 2 Engine room 3 Car compartment 4 Dash panel 4F Front 4R Rear 5 Front side member 6 Floor panel 7 Floor tunnel part 8 Dash side panel 11 Floor side member 12 Dash cross member 121 Both side parts 122 Center part 121a, 121b, 122a, 122b flange portion 121c outer end portion

Claims (4)

車室前部を仕切るダッシュパネルと、このダッシュパネルから前方に延びる左右一対のフロントサイドメンバと、前記ダッシュパネルに連続して車室の下面を形成するフロアパネルと、このフロアパネルの車幅方向の中央部分を車室内側に膨出させることにより車体の前後方向に形成されたフロアトンネル部とを備えた車体前部におけるダッシュクロスメンバの取付構造であって、前記フロントサイドメンバ相互間に車幅方向に配設されるダッシュクロスメンバを両側部分と中央部分とに３分割し、前記両側部分を前記ダッシュパネルの前面側に接合するとともに、これら両側部分の外側端部を車体前方側に傾斜させて、それぞれ前記フロントサイドメンバに接合し、前記中央部分を上記ダッシュパネルの後面側に接合するとともに該中央部分と前記両側部分の接続部の断面が前記ダッシュパネルの前後面で連続するように前記ダッシュクロスメンバの両側部分と中央部分の接続部を形成したことを特徴とする車体前部におけるダッシュクロスメンバの取付構造。   A dash panel that partitions the front part of the passenger compartment, a pair of left and right front side members that extend forward from the dash panel, a floor panel that continuously forms the lower surface of the passenger compartment, and the vehicle width direction of the floor panel A dash cross member mounting structure in a front part of a vehicle body having a floor tunnel part formed in the front-rear direction of the vehicle body by bulging the center part of the vehicle toward the vehicle interior side. The dash cross member arranged in the width direction is divided into three parts, a side part and a center part, and the both side parts are joined to the front side of the dash panel, and the outer ends of these side parts are inclined to the front side of the vehicle body. And joined to the front side member, and the central portion is joined to the rear side of the dash panel and the central portion. The dash cross member in the front portion of the vehicle body is formed with a connection portion between the both side portions and the center portion of the dash cross member so that a cross section of the connection portion of the both side portions is continuous on the front and rear surfaces of the dash panel. Mounting structure. 前記ダッシュクロスメンバの中央部分の上下フランジを介して前記ダッシュパネルの後面側に接合するとともに、該ダッシュクロスメンバの中央部分の下側フランジを前記フロアトンネル部の前端に設けられた前端フランジとともに前記ダッシュパネルの後面に３枚重ねで接合したことを特徴とする請求項１に記載の車体前部におけるダッシュクロスメンバの取付構造。   The dash cross member is joined to the rear surface side of the dash panel through the upper and lower flanges of the center portion of the dash cross member, and the lower flange of the center portion of the dash cross member is combined with the front end flange provided at the front end of the floor tunnel portion. The structure for mounting a dash cross member in a front portion of a vehicle body according to claim 1, wherein three panels are joined to the rear surface of the dash panel. 前記ダッシュクロスメンバの両側部分を前記フロントサイドメンバとの接合部からほぼ水平に車幅方向に延設し、前記ダッシュパネルを挟んで前記ダッシュクロスメンバの両側部分と中央部分とで形成する閉断面の中心線は曲率半径の大きな曲線となり、前記ダッシュクロスメンバの両側部分を前記ダッシュパネルの車体後方に折れ曲がる上下の折れ線に重なる位置に接合したことを特徴とする請求項１または２に記載の車体前部におけるダッシュクロスメンバの取付構造。   A closed cross-section formed by extending both sides of the dash cross member in the vehicle width direction substantially horizontally from the joint with the front side member, and forming the both sides and the center of the dash cross member across the dash panel 3. The vehicle body according to claim 1, wherein the center line of the vehicle body is a curve having a large curvature radius, and both side portions of the dash cross member are joined to positions overlapping the upper and lower fold lines that are bent rearward of the vehicle body of the dash panel. Dash cross member mounting structure at the front. 前記ダッシュクロスメンバの中央部分に合わせて前記ダッシュパネルの後面を車室内側に突出させて形成し、この突出部に沿って前記ダッシュクロスメンバの中央部分を車室内側に湾曲させて形成したことを特徴とする請求項１ないし３のいずれか１項に記載の車体前部におけるダッシュクロスメンバの取付構造。   The rear surface of the dash panel is formed to protrude toward the vehicle interior side in accordance with the central portion of the dash cross member, and the central portion of the dash cross member is formed to curve toward the vehicle interior side along the protrusion. The mounting structure of the dash cross member in the vehicle body front part according to any one of claims 1 to 3.
JP2011260158A 2011-11-29 2011-11-29 Dash cross member mounting structure at the front of the vehicle body Expired - Fee Related JP5928869B2 (en)

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JP2011260158A JP5928869B2 (en) 2011-11-29 2011-11-29 Dash cross member mounting structure at the front of the vehicle body
DE102012111166.9A DE102012111166B4 (en) 2011-11-29 2012-11-20 Mounting structure for dashboard cross member in a front part of a vehicle body
CN201210501935.9A CN103129623B (en) 2011-11-29 2012-11-29 The installation constitution of the front panel crossbeam of body forward structure

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DE102012111166B4 (en) 2018-11-15
DE102012111166A1 (en) 2013-05-29

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