JP2976650B2 - Car front side member - Google Patents
Car front side memberInfo
- Publication number
- JP2976650B2 JP2976650B2 JP3311467A JP31146791A JP2976650B2 JP 2976650 B2 JP2976650 B2 JP 2976650B2 JP 3311467 A JP3311467 A JP 3311467A JP 31146791 A JP31146791 A JP 31146791A JP 2976650 B2 JP2976650 B2 JP 2976650B2
- Authority
- JP
- Japan
- Prior art keywords
- rigid portion
- vehicle body
- section
- side member
- moment
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Body Structure For Vehicles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インナパネルとアウタ
パネルとによって閉断面に形成される剛性部を備える自
動車のフロントサイドメンバに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front side member of an automobile having a rigid portion formed in a closed cross section by an inner panel and an outer panel.
【０００２】図４および図５に示すように、アウタパネ
ル１０とインナパネル１１とによって閉断面に形成され
た、車体の前後方向へ伸びる剛性部１２と、剛性部１２
から車体の横方向の内方かつ下方へ伸びる基部１３とを
備えるフロントサイドメンバがある（実開平3-16580 号
公報）。断面がハット形状を呈するリィインフォース１
４が、閉断面内に配置され、剛性部１２の剛性を高めて
いる。As shown in FIGS. 4 and 5, a rigid section 12 formed in a closed cross section by an outer panel 10 and an inner panel 11 extends in the front-rear direction of the vehicle body, and a rigid section 12.
(See Japanese Utility Model Laid-Open No. 3-16580). Reinforce 1 with a hat-shaped cross section
4 are arranged in the closed cross section and increase the rigidity of the rigid portion 12.
【０００３】図６に示すように、正面視において基部１
３が剛性部１２から車体の内方へ倒れ込んだ形態である
ため、自動車の走行時に車体に上下方向の振動が加わる
と、剛性部１２は矢印Ａのように、内側上方と外側下方
との間で振動する。[0003] As shown in FIG.
3 is a form in which the rigid part 12 has fallen inward into the vehicle body from the rigid part 12, so that when the vehicle body is vibrated in the vertical direction during traveling of the vehicle, the rigid part 12 moves between the inner upper side and the outer lower side as shown by the arrow A. Vibrates at
【０００４】一方、フロントサイドメンバの剛性部１２
の閉断面は、図５に示すように、水平面に関して実質的
に対称であることから、前記閉断面の主軸となる直角座
標軸線Ｉ1、Ｉ2は図示のように位置する。すなわち、軸
線Ｉ1が閉断面の中央で水平に位置し、軸線Ｉ2が垂直に
位置する。ここで、軸線Ｉ1は、この軸線に関する断面
二次モーメントが最大となり、軸線Ｉ2は、この軸線に
関する断面二次モーメントが最小となるものである。On the other hand, the rigid portion 12 of the front side member
Is substantially symmetrical with respect to the horizontal plane as shown in FIG. 5, so that the rectangular coordinate axes I 1 and I 2 which are the main axes of the closed cross section are located as shown. That is, the axis I 1 is positioned horizontally at the center of the closed section, the axis I 2 is positioned vertically. Here, the axis I 1 has the largest moment of inertia with respect to this axis, and the axis I 2 has the smallest moment of inertia with respect to this axis.
【０００５】[0005]
【発明が解決しようとする課題】自動車の走行時にフロ
ントサイドメンバの剛性部が、内側上方と外側下方との
間で振動すること、剛性部の閉断面の主軸となる直角座
標軸線のうち、軸線Ｉ2が垂直に位置し、横方向の剛性
が低くなっていることから、剛性部が比較的低い周波数
の振動、たとえば、20〜30Hzのサスペンション系の振動
に共振することがある。The rigid portion of the front side member vibrates between the upper inner side and the lower outer side when the automobile is running. Of the rectangular coordinate axes which are the main axes of the closed cross section of the rigid portion, the axis is I 2 is positioned vertically, since the rigidity in the lateral direction is low, the vibration of relatively low frequency rigid portion, for example, may resonate with the vibration of the suspension system of 20～30Hz.
【０００６】本発明の目的は、剛性部が比較的低い周波
数の振動に共振するのを防止できる自動車のフロントサ
イドメンバを提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle front side member capable of preventing a rigid portion from resonating with a relatively low frequency vibration.
【０００７】[0007]
【課題を解決するための手段】本発明は、インナパネル
とアウタパネルとによって閉断面に形成された、車体の
前後方向へ伸びる剛性部と、該剛性部から車体の横方向
の内方かつ下方へ伸びる基部とを備える自動車のフロン
トサイドメンバである。SUMMARY OF THE INVENTION The present invention relates to a rigid portion formed in a closed cross section by an inner panel and an outer panel and extending in the front-rear direction of a vehicle body, and from the rigid portion to a laterally inward and downward direction of the vehicle body. A front side member of a motor vehicle having an extending base.
【０００８】１つの発明では、前記剛性部は、前記閉断
面内に配置され、車体の前後方向へ伸びる２つのリィイ
ンフォースを備える。これら２つのリィインフォース
は、前記閉断面の図心を通り、互いに直交する最大及び
最小の断面二次モーメントを表す２つの軸線のうち、断
面二次モーメントが最小となる軸線方向に間隔をおいて
配置され、これによって、前記剛性部は、断面二次モー
メントが最大となる軸線が車体の横方向の外方から内方
へ向けて下向きとなるように形成されている。In one aspect of the invention, the rigid portion includes two reinforcements disposed in the closed cross section and extending in the front-rear direction of the vehicle body. These two reinforcements are spaced apart in the direction of the axis where the second moment of area is minimum among the two axes passing through the centroid of the closed section and representing the maximum and minimum second moments of area orthogonal to each other. Accordingly, the rigid portion is formed such that the axis at which the second moment of area is maximized faces downward from the outside to the inside in the lateral direction of the vehicle body.
【０００９】前記２つのリィインフォースは、前記剛性
部を押出し成形して作ることによって剛性部と一体に設
けられたものとすることができる。The two reinforcements may be provided integrally with the rigid part by extruding the rigid part.
【００１０】別の発明では、前記剛性部は押出し成形し
て作られており、かつ、前記閉断面の図心を通り、互い
に直交する最大及び最小の断面二次モーメントを表す２
つの軸線のうち、断面二次モーメントが最小となる軸線
方向に間隔をおいて位置する、前記インナパネルと前記
アウタパネルとの２つの結合部であって板厚をその他の
部分の板厚より大きくした２つの結合部を有し、これに
よって、前記剛性部は、断面二次モーメントが最大とな
る軸線が車体の横方向の外方から内方へ向けて下向きと
なるように形成されている。In another aspect of the present invention, the rigid portion is formed by extrusion molding, and passes through the centroid of the closed cross section and represents the maximum and minimum second moments of area orthogonal to each other.
Of the two axes, two joints of the inner panel and the outer panel, which are located at an interval in the axial direction where the second moment of area is minimized, and have a greater thickness than the other portions. The rigid portion is formed such that the axis at which the second moment of area is maximized is directed downward from the outside to the inside in the lateral direction of the vehicle body.
【００１１】[0011]
【作用および効果】断面二次モーメントが最大となる軸
線が、車体の横方向の外方から内方へ向けて下向きとな
っているため、剛性部の振動方向に対する剛性が大きく
なる。[Function and Effect] Since the axis at which the second moment of area is maximum is directed downward from the outside to the inside in the lateral direction of the vehicle body, the rigidity of the rigid portion in the vibration direction increases.
【００１２】剛性部の振動方向に対する剛性が大きくな
った結果、剛性部の共振周波数が高くなり、低周波振動
に共振する現象が発生するのを防止できる。As a result of the rigid portion having increased rigidity in the vibration direction, the resonance frequency of the rigid portion is increased, and it is possible to prevent the phenomenon of resonance with low-frequency vibration from occurring.
【００１３】押出し成形により剛性部を作る発明によれ
ば、２つのリィインフォース又は板厚の大きな結合部を
剛性部の成形時に得ることができる。According to the invention in which the rigid portion is formed by extrusion, two reinforces or a joined portion having a large thickness can be obtained when the rigid portion is formed.
【００１４】[0014]
【実施例】自動車のフロントサイドメンバは、図１およ
び図２に示すように、車体の前後方向へ伸びる剛性部２
０と、剛性部２０から車体の横方向の内方かつ下方へ伸
びる基部２２とを備える。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a front side member of an automobile has a rigid portion 2 extending in the front-rear direction of a vehicle body.
0, and a base 22 extending inward and downward in the lateral direction of the vehicle body from the rigid portion 20.
【００１５】剛性部２０はアウタパネル２４とインナパ
ネル２６とによって閉断面に形成される。図示の実施例
では、アウタパネル２４は平板からなり、インナパネル
２６は、断面がコ字状を呈する部材からなる。アウタパ
ネル２４の端縁とインナパネル２６の端縁とを車体の前
後方向にスポット溶接して閉断面とし、剛性部２０が形
成されている。基部２２は、剛性部２０のアウタパネル
２４とインナパネル２６とを、車体の横方向の内方かつ
下方へ延長し、所定の形状としたものである。The rigid portion 20 is formed in a closed cross section by the outer panel 24 and the inner panel 26. In the illustrated embodiment, the outer panel 24 is formed of a flat plate, and the inner panel 26 is formed of a member having a U-shaped cross section. The edge of the outer panel 24 and the edge of the inner panel 26 are spot-welded in the front-rear direction of the vehicle body to form a closed cross section, and the rigid portion 20 is formed. The base 22 extends the outer panel 24 and the inner panel 26 of the rigid portion 20 inward and downward in the lateral direction of the vehicle body to have a predetermined shape.
【００１６】剛性部２０は、その閉断面内に配置され、
車体の前後方向へ伸びる２つのリィインフォース４０，
４２を備える。剛性部２０は、図２に示すように、閉断
面の主軸となる直角座標軸線、すなわち閉断面の図心Ｇ
を通る直角座標軸線Ｉ1，Ｉ2を有する。このうち軸線Ｉ
1は、軸線Ｉ1に関する断面二次モーメントが最大となる
ものであり、軸線Ｉ2は、軸線Ｉ2に関する断面二次モー
メントが最小となるものである。リィインフォース４
０，４２を含む剛性部２０は、断面二次モーメントが最
大となる軸線Ｉ1が車体の横方向の外方から内方へ向け
て下向きとなるように形成する。The rigid part 20 is arranged in its closed section,
Two reinforcements 40 extending in the longitudinal direction of the vehicle body,
42. As shown in FIG. 2, the rigid portion 20 has a rectangular coordinate axis serving as a main axis of the closed section, that is, a centroid G of the closed section.
Have rectangular coordinate axes I 1 , I 2 . Axis I
1 is for the second moment about the axis I 1 is the maximum, the axis I 2 is for the second moment about the axis I 2 is minimized. Reinforce 4
The rigid portion 20 including 0 and 42 is formed such that the axis I 1 at which the second moment of area is maximum is downward from the outside to the inside in the lateral direction of the vehicle body.
【００１７】２つのリィインフォース４０、４２は、剛
性部２０の閉断面の図心Ｇを通る直角座標軸線Ｉ1、Ｉ2
のうち、断面二次モーメントが最小となる軸線Ｉ2方向
に間隔をおいて位置する。すなわち、リィインフォース
４０，４２はほぼクランク状に形成してあり、リィイン
フォース４０を閉断面の上方の内方に、リィインフォー
ス４２を閉断面の下方の外方に取り付けてある。その結
果、軸線Ｉ1は、車体の横方向の外方から内方へ向けて
下向きとなっている。The two reinforces 40 and 42 are orthogonal coordinate axes I 1 and I 2 passing through the centroid G of the closed section of the rigid portion 20.
Of positioned at intervals in the axial I 2 direction geometrical moment of inertia is minimized. That is, the reinforcements 40 and 42 are formed in a substantially crank shape, and the reinforcement 40 is attached to the inside above the closed section and the reinforcement 42 is attached to the outside below the closed section. As a result, the axis I 1 has a downward toward the outside of the vehicle body in the lateral direction inwardly.
【００１８】図３に示した実施例では、剛性部５０はア
ルミニウムを押出し成形して作られたもので、アウタパ
ネル５２と、インナパネル５４とにより閉断面が画定さ
れている。そして、断面二次モーメントが最小となる軸
線Ｉ2方向に間隔をおいて位置する、アウタパネル５２
とインナパネル５４との上方の内方結合部５３と、下方
の外方結合部５５との板厚を、その他の部分の板厚より
大きくしてある。さらに、断面二次モーメントが最小と
なる軸線Ｉ2方向にリィインフォース５６を各結合部に
対向して設けてある。その結果、軸線Ｉ1は、車体の横
方向の外方から内方へ向けて下向きとなっている。In the embodiment shown in FIG. 3, the rigid portion 50 is made by extruding aluminum, and the outer panel 52 and the inner panel 54 define a closed cross section. Then, spaced in the axial I 2 direction geometrical moment of inertia is minimized, the outer panel 52
The thickness of the upper inner joint 53 and the lower outer joint 55 with the inner panel 54 is greater than the thickness of the other portions. Furthermore, it is provided to face the Ryi in force 56 in the axial I 2 direction geometrical moment of inertia is minimized to each coupling portion. As a result, the axis I 1 has a downward toward the outside of the vehicle body in the lateral direction inwardly.
【００１９】図３に示した実施例では、結合部５３、５
５の板厚を大きくすると共に、リィインフォース５６を
設けてあるが、これに代えて、板厚を大きくするだけ、
あるいはアウタパネル５２とインナパネル５４との板厚
を均一にし、リィインフォース５６だけを設けるように
してもよい。In the embodiment shown in FIG.
5 and the reinforcement 56 are provided, but instead of this, only the thickness is increased,
Alternatively, the thickness of the outer panel 52 and the inner panel 54 may be made uniform, and only the reinforcement 56 may be provided.
【図１】本発明に係る自動車のフロントサイドメンバの
実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of a front side member of an automobile according to the present invention.
【図２】図１の２−２線に沿って切断した断面図であ
る。FIG. 2 is a sectional view taken along line 2-2 of FIG.
【図３】本発明に係る自動車のフロントサイドメンバの
別の実施例を示す、図２と同様な断面図である。FIG. 3 is a sectional view similar to FIG. 2, showing another embodiment of the front side member of the vehicle according to the present invention.
【図４】従来の自動車のフロントサイドメンバの斜視図
である。FIG. 4 is a perspective view of a front side member of a conventional automobile.
【図５】図４の５−５線に沿って切断した断面図であ
る。FIG. 5 is a sectional view taken along the line 5-5 in FIG. 4;
【図６】図４に示したフロントサイドメンバの作用を示
す模式図で、（ａ）は平面を、（ｂ）は正面を、そして
（ｃ）は側面を示す。6A and 6B are schematic views showing the operation of the front side member shown in FIG. 4, wherein FIG. 6A is a plan view, FIG. 6B is a front view, and FIG.
２０、５０ 剛性部 ２２ 基部 ２４、５２ アウタパネル ２６、５４ インナパネル ４０、４２、５６ リィインフォース ５３、５５ 結合部 20, 50 Rigid part 22 Base 24, 52 Outer panel 26, 54 Inner panel 40, 42, 56 Reinforce 53, 55 Coupling part
Claims (3)
閉断面に形成された、車体の前後方向へ伸びる剛性部
と、該剛性部から車体の横方向の内方かつ下方へ伸びる
基部とを備える自動車のフロントサイドメンバであっ
て、 前記剛性部は、前記閉断面内に配置され、車体の前後方
向へ伸びる２つのリィインフォースを備え、 これら２つのリィインフォースは、前記閉断面の図心を
通り、互いに直交する最大及び最小の断面二次モーメン
トを表す２つの軸線のうち、断面二次モーメントが最小
となる軸線方向に間隔をおいて配置され、これによっ
て、前記剛性部は、断面二次モーメントが最大となる軸
線が車体の横方向の外方から内方へ向けて下向きとなる
ように形成された、自動車のフロントサイドメンバ。1. A vehicle front having a rigid portion formed in a closed cross section by an inner panel and an outer panel and extending in the front-rear direction of the vehicle body, and a base extending from the rigid portion inward and downward in the lateral direction of the vehicle body. A side member, wherein the rigid portion includes two reinforces disposed in the closed cross section and extending in the front-rear direction of the vehicle body, and these two reinforces pass through the centroid of the closed cross section, Of the two axes that represent the maximum and minimum moments of inertia that are orthogonal to each other, they are arranged at an interval in the axial direction where the moment of inertia is the smallest, whereby the rigid portion has a second moment of area A front side member of an automobile, wherein the maximum axis is directed downward from the outside in the lateral direction of the vehicle body toward the inside.
性部を押出し成形して作ることによって剛性部と一体に
設けられた、請求項１に記載の自動車のフロントサイド
メンバ。2. The front side member according to claim 1, wherein the two reinforcements are provided integrally with the rigid portion by extruding the rigid portion.
閉断面に形成された、車体の前後方向へ伸びる剛性部
と、該剛性部から車体の横方向の内方かつ下方へ伸びる
基部とを備える自動車のフロントサイドメンバであっ
て、 前記剛性部は押出し成形して作られており、かつ、前記
閉断面の図心を通り、互いに直交する最大及び最小の断
面二次モーメントを表す２つの軸線のうち、断面二次モ
ーメントが最小となる軸線方向に間隔をおいて位置す
る、前記インナパネルと前記アウタパネルとの２つの結
合部であって板厚をその他の部分の板厚より大きくした
２つの結合部を有し、これによって、前記剛性部は、断
面二次モーメントが最大となる軸線が車体の横方向の外
方から内方へ向けて下向きとなるように形成された、自
動車のフロントサイドメンバ。3. A vehicle front having a rigid portion formed in a closed cross section by an inner panel and an outer panel and extending in the front-rear direction of the vehicle body, and a base extending from the rigid portion inward and downward in the lateral direction of the vehicle body. A side member, wherein the rigid portion is formed by extrusion molding, and passes through a centroid of the closed cross section, and has a cross section of two axes representing maximum and minimum second moments of area orthogonal to each other. There are two connecting portions of the inner panel and the outer panel, which are located at intervals in the axial direction where the second moment is minimized, and has two connecting portions whose plate thicknesses are larger than those of other portions. Thereby, the rigid portion is formed such that the axis at which the second moment of area is maximized is directed downward from the outside to the inside in the lateral direction of the vehicle body. Members.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3311467A JP2976650B2 (en) | 1991-10-31 | 1991-10-31 | Car front side member |
| US08/235,224 US5370438A (en) | 1991-10-31 | 1994-04-29 | Structural member of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3311467A JP2976650B2 (en) | 1991-10-31 | 1991-10-31 | Car front side member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05124538A JPH05124538A (en) | 1993-05-21 |
| JP2976650B2 true JP2976650B2 (en) | 1999-11-10 |
Family
ID=18017580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3311467A Expired - Fee Related JP2976650B2 (en) | 1991-10-31 | 1991-10-31 | Car front side member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2976650B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19604942C2 (en) * | 1996-02-10 | 2002-09-12 | Daimler Chrysler Ag | suspension carrier |
-
1991
- 1991-10-31 JP JP3311467A patent/JP2976650B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05124538A (en) | 1993-05-21 |
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