JP4193373B2

JP4193373B2 - Hollow structure

Info

Publication number: JP4193373B2
Application number: JP2001143741A
Authority: JP
Inventors: 義博寿浅
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2001-05-14
Filing date: 2001-05-14
Publication date: 2008-12-10
Anticipated expiration: 2021-05-14
Also published as: JP2002337730A

Description

【０００１】
【発明の属する技術分野】
本発明は中空構造体に係り、特に、自動車等の車両の骨格部材を構成する中空構造体に関する。
【０００２】
【従来の技術】
従来、自動車等の車両の骨格部材を構成する中空構造体においては、その一例が特開平９−１９３８３２号公報に示されている。
【０００３】
図６に示される如く、この中空構造体では、中空構造体としてのセンターピラー１００が、アウターパネル１０２、インナーパネル１０４及びロアリインフォースメント１０６で構成されている。また、これらの各部材１０２、１０４、１０６は、フランジが無く樋状に形成されており、各部材１０２、１０４、１０６の両側片部１０２Ａ、１０２Ｂ、１０４Ａ、１０４Ｂ、１０６Ａ、１０６Ｂが互いに平行に重ね合わされ、断面日字状とされている。
【０００４】
【発明が解決しようとする課題】
しかしながら、この中空構造体においては、断面日字状にするために、アウターパネル１０２、インナーパネル１０４、ロアリインフォースメント１０６の３部品を使用しており、構成部品点数が多い。また、この中空構造体においては、アウターパネル１０２、インナーパネル１０４、ロアリインフォースメント１０６の３部品の各側片部１０２Ａ、１０４Ａ、１０６Ａ及び１０２Ｂ、１０４Ｂ、１０６Ｂを溶着しているため、溶着部の間隔Ｌが広くなり強度が低下する。
【０００５】
本発明は上記事実を考慮し、部品点数を低減できると共に強度を向上できる中空構造体を得ることが目的である。
【０００６】
【課題を解決するための手段】
請求項１記載の本発明における中空構造体は、閉断面構造とされ、上壁部に車体前後方向に沿って延びると共に前記閉断面構造の内部に向かって凹む凹部が形成されたサイドメンバと、
前記サイドメンバの上壁部に固定され、前記凹部と対向する部位に上方に突出したビードが車体前後方向に沿って形成されたパネルと、
を有し、前記凹部と前記ビードとで形成した閉断面構造の両外側部において前記サイドメンバと前記パネルとを片側溶接で溶着することで二層閉断面構造を形成したことを特徴とする。
【０００７】
従って、閉断面構造とされ、上壁部に車体前後方向に沿って延びると共に前記閉断面構造の内部に向かって凹む凹部が形成されたサイドメンバの凹部と、サイドメンバの上壁部に固定され、前記凹部と対向する部位に上方に突出したビードが車体前後方向に沿って形成されたパネルのビードと、で二層閉断面構造を形成することができるため、部品点数を低減できる。また、凹部とビードとで形成した閉断面構造の両外側部においてサイドメンバとパネルとを片側溶接で溶着できるため、溶着部の間隔を、サイドメンバの両側壁部の間隔より狭くして強度を向上できる。
【０００８】
請求項２記載の本発明は、請求項１に記載の中空構造体において、前記サイドメンバと前記パネルとで形成される前記閉断面構造を、前記サイドメンバの曲げ圧縮がかかる側に形成したことを特徴とする。
【０００９】
従って、請求項１に記載の内容に加えて、サイドメンバの圧縮を受ける側の強度を上げることができるため、曲げ変形を効果的に抑制できる。
【００１０】
請求項３記載の本発明は、請求項１又は請求項２に記載の中空構造体において、前記サイドメンバと前記パネルとで形成される前記閉断面構造内に充填材を設けたことを特徴とする。
【００１１】
従って、請求項１又は請求項２に記載の内容に加えて、サイドメンバとパネルとで形成される閉断面構造内に充填材を設けたことで、強度を上げることができる。
【００１４】
【発明の実施の形態】
本発明における中空構造体の一実施形態を図１〜図３に従って説明する。
【００１５】
なお、図中矢印ＦＲは車両前方方向を、矢印ＵＰは車両上方方向を、矢印ＩＮは車幅内側方向を示す。
【００１６】
図３に示される如く、本実施形態の中空構造体はフロントサイドメンバ１０に適用されており、フロントサイドメンバ１０は、車両前部の車幅方向両端下部近傍に車両前後方向に沿って左右一対（車両左側のフロントサイドメンバは図示省略）配設されている。また、フロントサイドメンバ１０の前部１２は、エンジンルーム内に配設されており、フロントサイドメンバ１０の後部１４は、ダッシュパネル１６の傾斜部１６Ａ、平面部１６Ｂ及びフロアパネル１８の各下面に沿って車両後方へ延設されている。
【００１７】
フロントサイドメンバ１０の前部１２は、フロントサイドメンバ１０の下部を構成する構造体としてのフロントサイドメンバロア２０と、フロントサイドメンバ１０の上部を構成する構造体としてのフロントサイドメンバアッパ２２とで構成されている。なお、フロントサイドメンバロア２０は、例えば、ハイドロフォームにより筒状に製造されている。
【００１８】
フロントサイドメンバ１０の前部１２におけるサスタワー２６の車室側内側部及びその後方となる部位においては、フロントサイドメンバロア２０の車両前後方向から見た断面形状はロ字状とされている。また、フロントサイドメンバアッパ２２の車両前後方向から見た断面形状は、開口部を車両下方へ向けたコ字状とされており、左右の側壁部２２Ａ、２２Ｂの下端部が、それぞれフロントサイドメンバロア２０における左右の側壁部２０Ａ、２０Ｂの上端部にそれぞれレーザ溶接、アーク溶接、プラズマ溶接等の溶接面に対して一方側、即ち、フロントサイドメンバアッパ２２の外周側からのみ溶接する片側溶接にて溶着されている。この結果、フロントサイドメンバ１０の車両前後方向から見た断面形状は、日字状とされている。
【００１９】
なお、フロントサイドメンバロア２０に溶着されたナット２８に螺合するボルト（図示省略）によって、フロントサイドメンバ１０の下部にサスペンションロアアーム（図示省略）が取付けられている。
【００２０】
また、フロントサイドメンバ１０の後部１４は、フロントサイドメンバロア２０のみで構成されている。
【００２１】
図２に示される如く、フロントサイドメンバ１０の後部１４となる部位では、フロントサイドメンバロア２０の上壁部２０Ｃの幅方向中央部に、前後方向に沿って延びる断面形状が逆台形状の凹部３０が形成されている。また、フロントサイドメンバロア２０の凹部３０と対向するダッシュパネル１６の傾斜部１６Ａ及び平面部１６Ｂの各部位には上方に突出した断面形状が台形状のビード３２が前後方向に沿って形成されている。
【００２２】
なお、図３に示される如く、フロントサイドメンバロア２０の凹部３０と対向するフロアパネル１８の部位にもビード３２が前後方向に沿って形成されている。
【００２３】
図１に示される如く、フロントサイドメンバロア２０の上壁部２０Ｃにおける両側部２０Ｄ上に、ダッシュパネル１６におけるビード３２の両外側部１６Ｃが重合されており、レーザ溶接、アーク溶接、プラズマ溶接等の溶接面に対して一方側、即ち、フロントサイドメンバロア２０の上方側からのみ溶接する片側溶接にて溶着（溶着部Ｐ）されている。また、これらの溶着部Ｐは図２に示される如く車両前後方向に沿って連続している。
【００２４】
この結果、フロントサイドメンバロア２０で形成される第１閉断面構造４０において、曲げ圧縮がかかる側、本実施形態では上側に、フロントサイドメンバロア２０とダッシュパネル１６とで形成される第２閉断面構造４２が形成され、二層閉断面構造となっている。
【００２５】
なお、フロントサイドメンバロア２０とフロアパネル１８との接合も同様に二層閉断面構造となっている。
【００２６】
次に、本実施形態の作用を説明する。
【００２７】
本実施形態におけるフロントサイドメンバ１０の後部１４では、フロントサイドメンバロア２０とダッシュパネル１６との２部材を片側溶接にて溶着し二層閉断面構造としている。この結果、３部品により二層閉断面構造を形成する従来構造に比べ、部品点数を低減できる。
【００２８】
また、図１に示される如く、フロントサイドメンバロア２０の両側壁部２０A、２０Ｂの内側となる部位、即ち、フロントサイドメンバロア２０の上壁部２０Ｃにおける両側部２０Ｄ上に、ダッシュパネル１６との２本の溶着部Ｐを形成できるため、２本の溶着部Ｐの間隔Ｌ１が、フロントサイドメンバロア２０の両側壁部２０A、２０Ｂの間隔Ｌ２より狭くなり強度を向上できる。
【００２９】
また、本実施形態では、フロントサイドメンバロア２０で形成される第１閉断面構造４０において、曲げ圧縮がかかる上側に、フロントサイドメンバロア２０とダッシュパネル１６とで形成される第２閉断面構造４２が形成されている。この結果、フロントサイドメンバロア２０における圧縮を受ける上側の強度を上げることができるため、曲げ変形を効果的に抑制できる。
【００３０】
以上に於いては、本発明を特定の実施形態について詳細に説明したが、本発明はかかる実施形態に限定されるものではなく、本発明の範囲内にて他の種々の実施形態が可能であることは当業者にとって明らかである。例えば、上記実施形態では、凹部３０の断面形状を逆台形状とし、ビード３２の断面形状を台形状としたが、凹部３０及びビード３２の断面形状は前記各形状に限定されない。
【００３１】
また、上記実施形態では、図２に示される如く、フロントサイドメンバロア２０とダッシュパネル１６との溶着部Ｐを車両前後方向に沿って連続して形成したが、これに代えて、図４に示される如く、フロントサイドメンバロア２０の曲げ部２０Ｅのみ、または、曲げ部２０Ｅとその近傍のみを連続して溶着し、他の部位は、所定の間隔を開けて溶着しても良い。
【００３２】
また、上記実施形態では、図１に示される如く、フロントサイドメンバロア２０とダッシュパネル１６とで形成される第２閉断面構造４２を空洞としたが、これに代えて、図５に示される如く、フロントサイドメンバロア２０とダッシュパネル１６とで形成される第２閉断面構造４２内に、発泡樹脂等の充填材４４を配設することで、強度を上げることができる構成としても良い。
【００３３】
また、上記実施形態では、本発明の中空構造体をフロントサイドメンバ１０に適用したが、本発明の中空構造体はフロントサイドメンバ以外の他のサイドメンバにも適用可能である。
【００３４】
【発明の効果】
請求項１記載の本発明における中空構造体は、閉断面構造とされ、上壁部に車体前後方向に沿って延びると共に閉断面構造の内部に向かって凹む凹部が形成されたサイドメンバと、サイドメンバの上壁部に固定され、凹部と対向する部位に上方に突出したビードが車体前後方向に沿って形成されたパネルと、を有し、凹部とビードとで形成した閉断面構造の両外側部においてサイドメンバとパネルとを片側溶接で溶着することで二層閉断面構造を形成したため、部品点数を低減できると共に強度を向上できるという優れた効果を有する。
【００３５】
請求項２記載の本発明は、請求項１に記載の中空構造体において、サイドメンバとパネルとで形成される閉断面構造を、サイドメンバの曲げ圧縮がかかる側に形成したため、請求項１に記載の効果に加えて、曲げ変形を効果的に抑制できるという優れた効果を有する。
【００３６】
請求項３記載の本発明は、請求項１又は請求項２に記載の中空構造体において、サイドメンバとパネルとで形成される閉断面構造内に充填材を設けたため、請求項１又は請求項２に記載の効果に加えて、強度を上げることができるという優れた効果を有する。
【図面の簡単な説明】
【図１】図２の１−１線の沿った拡大断面図である。
【図２】本発明の一実施形態に係る中空構造体を示す車体斜め後方内側から見た斜視図である。
【図３】本発明の一実施形態に係る中空構造体が適用された車体の一部を示す車体斜め後方内側から見た斜視図である。
【図４】本発明の他の実施形態に係る中空構造体を示す車体斜め後方内側から見た斜視図である。
【図５】本発明の他の実施形態に係る中空構造体を示す図１に対応する断面図である。
【図６】従来技術の中空構造体を示す断面図である。
【符号の説明】
１０フロントサイドメンバ
１４フロントサイドメンバの後部
１６ダッシュパネル（パネル）
２０フロントサイドメンバロア（閉断面構造のサイドメンバ）
４０第１閉断面構造
４２第２閉断面構造
４４充填材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hollow structure, and more particularly to a hollow structure constituting a skeleton member of a vehicle such as an automobile.
[0002]
[Prior art]
Conventionally, an example of a hollow structure constituting a skeleton member of a vehicle such as an automobile is disclosed in Japanese Patent Laid-Open No. 9-193832.
[0003]
As shown in FIG. 6, in this hollow structure, a center pillar 100 as a hollow structure is composed of an outer panel 102, an inner panel 104, and a lower reinforcement 106. Each of the members 102, 104, and 106 is formed in a bowl shape without a flange, and both side pieces 102A, 102B, 104A, 104B, 106A, and 106B of the members 102, 104, and 106 are parallel to each other. It is overlapped and has a cross-sectional shape.
[0004]
[Problems to be solved by the invention]
However, in this hollow structure, three parts of the outer panel 102, the inner panel 104, and the lower reinforcement 106 are used in order to make the cross-sectional shape of a letter, and the number of component parts is large. Further, in this hollow structure, since the side pieces 102A, 104A, 106A and 102B, 104B, 106B of the three parts of the outer panel 102, the inner panel 104, and the lower reinforcement 106 are welded, The distance L is widened and the strength is lowered.
[0005]
In view of the above facts, an object of the present invention is to obtain a hollow structure that can reduce the number of parts and improve the strength.
[0006]
[Means for Solving the Problems]
The hollow structure according to the first aspect of the present invention has a closed cross-section structure, and a side member in which a concave portion that extends along the vehicle body longitudinal direction and is recessed toward the inside of the closed cross-section structure is formed on the upper wall portion,
A panel that is fixed to the upper wall portion of the side member and has a bead that protrudes upward at a portion facing the concave portion along the longitudinal direction of the vehicle body ;
The two side closed cross-sectional structure is formed by welding the side member and the panel by one-side welding at both outer side portions of the closed cross-sectional structure formed by the recess and the bead .
[0007]
Accordingly, the structure is a closed cross-section structure, and the upper wall portion is fixed to the upper wall portion of the side member that extends along the longitudinal direction of the vehicle body and has a concave portion that is recessed toward the inside of the closed cross-sectional structure. Since the two-layer closed cross-sectional structure can be formed by the bead of the panel in which the bead protruding upward in the portion facing the recess is formed in the longitudinal direction of the vehicle body , the number of parts can be reduced. In addition, since the side member and the panel can be welded by one-side welding at both outer sides of the closed cross-sectional structure formed by the recess and the bead, the interval between the welded portions is made narrower than the interval between the side wall portions of the side member , thereby increasing the strength. It can be improved.
[0008]
According to a second aspect of the invention, the hollow structure according to claim 1, that the closed cross section formed by the said side member and the panel was formed on the side where the bending compression of the side member takes It is characterized by.
[0009]
Therefore, in addition to the content of the first aspect, the strength of the side member subjected to compression can be increased, so that bending deformation can be effectively suppressed.
[0010]
According to a third aspect of the invention, the hollow structure according to claim 1 or claim 2, and characterized in that a filling material into the closed section structure formed by the said side member and said panel To do.
[0011]
Therefore, in addition to the content of Claim 1 or Claim 2 , the strength can be increased by providing the filler in the closed cross-sectional structure formed by the side member and the panel.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a hollow structure in the present invention will be described with reference to FIGS.
[0015]
In the figure, the arrow FR indicates the vehicle front direction, the arrow UP indicates the vehicle upward direction, and the arrow IN indicates the vehicle width inside direction.
[0016]
As shown in FIG. 3, the hollow structure of the present embodiment is applied to the front side member 10, and the front side member 10 is a pair of left and right along the vehicle front-rear direction in the vicinity of both lower ends in the vehicle width direction of the front part of the vehicle. (The front side member on the left side of the vehicle is not shown). Further, the front portion 12 of the front side member 10 is disposed in the engine room, and the rear portion 14 of the front side member 10 is provided on the lower surfaces of the inclined portion 16A, the flat portion 16B, and the floor panel 18 of the dash panel 16. Along the rear of the vehicle.
[0017]
The front portion 12 of the front side member 10 includes a front side member lower 20 as a structure constituting the lower portion of the front side member 10 and a front side member upper 22 as a structure constituting the upper portion of the front side member 10. It is configured. The front side member lower 20 is manufactured in a cylindrical shape by, for example, hydroforming.
[0018]
At the front side 12 of the front side member 10, the cross-sectional shape of the front side member lower 20 viewed from the front-rear direction of the vehicle is the letter R shape. Further, the cross-sectional shape of the front side member upper 22 viewed from the front-rear direction of the vehicle is a U-shape with the opening directed downward in the vehicle, and the lower end portions of the left and right side wall portions 22A and 22B are respectively front side members. For one-side welding in which the upper ends of the left and right side wall portions 20A and 20B in the lower 20 are welded only from one side, that is, from the outer peripheral side of the front side member upper 22 to the welding surfaces such as laser welding, arc welding, and plasma welding. Are welded. As a result, the cross-sectional shape of the front side member 10 viewed from the vehicle front-rear direction is a Japanese character.
[0019]
Note that a suspension lower arm (not shown) is attached to the lower portion of the front side member 10 by a bolt (not shown) screwed into a nut 28 welded to the front side member lower 20.
[0020]
Further, the rear portion 14 of the front side member 10 is composed of only the front side member lower 20.
[0021]
As shown in FIG. 2, in a portion that becomes the rear portion 14 of the front side member 10, a concave portion having a reverse trapezoidal cross-sectional shape extending in the front-rear direction at the center in the width direction of the upper wall portion 20C of the front side member lower 20. 30 is formed. In addition, a bead 32 having a trapezoidal cross-sectional shape protruding upward is formed along the front-rear direction at each portion of the inclined portion 16A and the flat portion 16B of the dash panel 16 facing the concave portion 30 of the front side member lower 20. Yes.
[0022]
As shown in FIG. 3, a bead 32 is also formed along the front-rear direction at a portion of the floor panel 18 that faces the recess 30 of the front side member lower 20.
[0023]
As shown in FIG. 1, both outer side portions 16C of the beads 32 of the dash panel 16 are superposed on both side portions 20D of the upper wall portion 20C of the front side member lower 20, and laser welding, arc welding, plasma welding, etc. Are welded (welded portion P) by one-side welding in which welding is performed only from one side, that is, from above the front side member lower 20. Further, these welds P are continuous along the vehicle longitudinal direction as shown in FIG.
[0024]
As a result, in the first closed cross-section structure 40 formed by the front side member lower 20, the second closed section formed by the front side member lower 20 and the dash panel 16 is formed on the side where bending compression is applied, in the present embodiment, on the upper side. A cross-sectional structure 42 is formed to form a two-layer closed cross-sectional structure.
[0025]
The front side member lower 20 and the floor panel 18 are similarly joined with a two-layer closed cross-sectional structure.
[0026]
Next, the operation of this embodiment will be described.
[0027]
In the rear portion 14 of the front side member 10 in the present embodiment, two members of the front side member lower 20 and the dash panel 16 are welded by one-side welding to form a two-layer closed cross-sectional structure. As a result, the number of parts can be reduced as compared with the conventional structure in which the two-layer closed cross-sectional structure is formed by three parts.
[0028]
In addition, as shown in FIG. 1, the dash panel 16 and the inner side of both side walls 20 </ b> A and 20 </ b> B of the front side member lower 20, that is, on both side portions 20 </ b> D of the upper wall portion 20 </ b> C of the front side member lower 20 Since the two welded portions P can be formed, the distance L1 between the two welded portions P is narrower than the distance L2 between the side wall portions 20A and 20B of the front side member lower 20, and the strength can be improved.
[0029]
In the present embodiment, in the first closed cross-section structure 40 formed by the front side member lower 20, the second closed cross-section structure formed by the front side member lower 20 and the dash panel 16 on the upper side where bending compression is applied. 42 is formed. As a result, the strength of the upper side subjected to compression in the front side member lower 20 can be increased, so that bending deformation can be effectively suppressed.
[0030]
Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the above embodiment, the cross-sectional shape of the concave portion 30 is an inverted trapezoidal shape, and the cross-sectional shape of the bead 32 is a trapezoidal shape, but the cross-sectional shapes of the concave portion 30 and the bead 32 are not limited to the above shapes .
[0031]
Moreover, in the said embodiment, as FIG. 2 showed, although the welding part P of the front side member lower 20 and the dash panel 16 was formed continuously along the vehicle front-back direction, it replaces with this in FIG. As shown, only the bent portion 20E of the front side member lower 20 or only the bent portion 20E and the vicinity thereof may be welded continuously, and other portions may be welded at a predetermined interval.
[0032]
In the above embodiment, as shown in FIG. 1, the second closed cross-sectional structure 42 formed by the front side member lower 20 and the dash panel 16 is a cavity, but instead, this is shown in FIG. 5. As described above, the filler 44 such as foamed resin may be provided in the second closed cross-sectional structure 42 formed by the front side member lower 20 and the dash panel 16 to increase the strength .
[0033]
Moreover, in the said embodiment, although the hollow structure body of this invention was applied to the front side member 10, the hollow structure body of this invention is applicable also to other side members other than a front side member .
[0034]
【The invention's effect】
The hollow structure according to the first aspect of the present invention has a closed cross-sectional structure, a side member in which a concave portion extending along the longitudinal direction of the vehicle body and recessed toward the inside of the closed cross-sectional structure is formed in the upper wall portion, A panel that is fixed to the upper wall of the member and has a bead that protrudes upward in a portion facing the recess and is formed along the longitudinal direction of the vehicle body, on both outer sides of the closed cross-sectional structure formed by the recess and the bead Since the two-layer closed cross-sectional structure is formed by welding the side member and the panel at one part by one-side welding, it has an excellent effect that the number of parts can be reduced and the strength can be improved.
[0035]
According to a second aspect of the present invention, in the hollow structure according to the first aspect, the closed cross-sectional structure formed by the side member and the panel is formed on the side where the side member is bent and compressed. In addition to the effects described above, it has an excellent effect that bending deformation can be effectively suppressed.
[0036]
According to a third aspect of the invention, the hollow structure according to claim 1 or claim 2, in which a filler closed section structure formed by the side member and the panel, according to claim 1 or claim In addition to the effect described in 2 , it has an excellent effect that the strength can be increased.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view taken along line 1-1 of FIG.
FIG. 2 is a perspective view showing a hollow structure according to an embodiment of the present invention, as viewed from the obliquely rearward inner side of the vehicle body.
FIG. 3 is a perspective view showing a part of a vehicle body to which a hollow structure according to an embodiment of the present invention is applied, as viewed from the obliquely rearward inner side of the vehicle body.
FIG. 4 is a perspective view showing a hollow structure according to another embodiment of the present invention as seen from the obliquely rearward inner side of the vehicle body.
FIG. 5 is a cross-sectional view corresponding to FIG. 1 showing a hollow structure according to another embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a conventional hollow structure.
[Explanation of symbols]
10 Front side member 14 Rear part of front side member 16 Dash panel (panel)
20 front side member lower (side members of the closed cross-sectional structure)
40 First closed section structure 42 Second closed section structure 44 Filler

Claims

A side member that has a closed cross-sectional structure and that extends along the longitudinal direction of the vehicle body on the upper wall and has a recess that is recessed toward the inside of the closed cross-sectional structure;
A panel that is fixed to the upper wall portion of the side member and has a bead protruding upward in a vehicle body front-rear direction at a portion facing the recess ;
And a two-layer closed cross-section structure is formed by welding the side member and the panel by one-side welding at both outer side portions of the closed cross-section structure formed by the recess and the bead. Structure.

The hollow structure according to claim 1, characterized in that the said closed section structure formed by the side members and the panels were formed on the side where the bending compression of the side member takes.

The hollow structure according to claim 1 or claim 2, characterized in that a filling material into the closed section structure formed by the said side member and said panel.