JP2003019907A - Suspension arm - Google Patents
Suspension armInfo
- Publication number
- JP2003019907A JP2003019907A JP2002151068A JP2002151068A JP2003019907A JP 2003019907 A JP2003019907 A JP 2003019907A JP 2002151068 A JP2002151068 A JP 2002151068A JP 2002151068 A JP2002151068 A JP 2002151068A JP 2003019907 A JP2003019907 A JP 2003019907A
- Authority
- JP
- Japan
- Prior art keywords
- plate member
- cylindrical portion
- cylindrical
- arm
- bush support
- 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.)
- Pending
Links
Landscapes
- Vehicle Body Suspensions (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、断面コ字状とされ
た第１板部材の側部と断面コ字状とされた第２板部材の
側部とを溶接することにより中空矩形閉断面構造のアー
ムが構成され、およそ第１板部材から第２板部材へ向か
う方向を軸線方向とする円筒状のブッシュ支持部を有す
るサスペンションアームに関する。
【０００２】
【従来の技術】サスペンション形式には、ダブルウイッ
シュボーン式、ストラット式、マルチリンク式、トレー
リングアーム式等、種々の形式がある。これに対応し
て、サスペンションを構成するサスペンションアームに
も種々の形式がある。形状の観点ではＡ型アーム、Ｌ型
アーム、Ｉ型アーム等があり、構造の観点ではパイプ状
のものや鋼板をプレス加工したもの、或いはアルミ鍛造
製のもの等がある。
【０００３】上述した如く、サスペンションアームには
種々のタイプがある訳であるが、その中でもプレス加工
した二枚の板状部材を相互に溶接することにより構成さ
れたサスペンションアームについて以下に簡単に説明す
る。この種のサスペンションアームの開示例として、ト
ヨタ技術公開集４４５０号（１９９２年２月２８日発
行）を挙げることができる。
【０００４】図７には、前記刊行物に開示されたサスペ
ンションアームであるＬ型ロアアーム１００の正面図が
示されている。この図に示される如く、このＬ型ロアア
ーム１００は、アームアッパ側を構成する上板部材１０
２と、アームロア側を構成する下板部材１０４と、を備
えており、両者の開放側端部１０２Ａ、１０４Ａ同士を
溶接することにより構成されている。また、Ｌ型ロアア
ーム１００のインボード側の端部には、上下方向を軸線
とする円筒形のブッシュ支持部１０６が溶接により取り
付けられている。このブッシュ支持部１０６内に図示し
ないブッシュが圧入される構成である。
【０００５】
【発明が解決しようとする課題】しかしながら、上記構
成による場合、ブッシュ支持部１０６をＬ型ロアアーム
１００のインボード側の端部に溶接する際の熱が、ブッ
シュ支持部１０６に直接伝達されるという問題点があ
る。この場合、熱によるブッシュ支持部１０６の歪みを
考慮する必要があるので、ブッシュ支持部１０６の取付
精度（ひいては、ブッシュ支持部１０６に圧入されるブ
ッシュの軸線精度）を確保しにくくなる。
【０００６】本発明は上記事実を考慮し、ブッシュ支持
部の精度を高めることができるサスペンションアームを
得ることが目的である。
【０００７】
【課題を解決するための手段】本発明は、断面コ字状と
された第１板部材の側部と断面コ字状とされた第２板部
材の側部とを溶接することにより中空矩形閉断面構造の
アームが構成され、およそ第１板部材から第２板部材へ
向かう方向を軸線方向とする円筒状のブッシュ支持部を
有するサスペンションアームであって、前記ブッシュ支
持部は、第１板部材の所定部位を側部より内側でアーム
断面内方へ折り曲げることにより設けられた第１円筒状
部と、第２板部材の所定部位を側部より内側でアーム断
面内方へ折り曲げることにより設けられかつ端部が第１
円筒状部の端部と互いに対向して配置された第２円筒状
部と、によって構成されており、さらに、第１円筒状部
と被溶接部位である第１板部材の側部との間及び第２円
筒状部と被溶接部位である側部との間に、第１円筒状部
及び第２円筒状部に沿う前記各側部の溶接時の熱が第１
円筒状部及び第２円筒状部に直接伝達されるのを阻止す
るための所定の隙間をそれぞれ設けた、ことを特徴とし
ている。
【０００８】
【作用】上記構成によれば、断面コ字状とされた第１板
部材の側部と、断面コ字状とされた第２板部材の側部と
を溶接することにより、中空矩形閉断面構造のサスペン
ションアームが構成される。さらに、第１板部材の所定
部位を側部より内側でアーム断面内方へ折り曲げること
により設けられた第１円筒状部と、第２板部材の所定部
位を側部より内側でアーム断面内方へ折り曲げることに
より設けられかつ端部が第１円筒状部の端部と互いに対
向して配置された第２円筒状部と、によってブッシュ支
持部が構成される。かかる構成のブッシュ支持部内にブ
ッシュが圧入される。
【０００９】ここで、本発明では、第１筒状部と被溶接
部位である第１板部材の開放側端部との間及び第２筒状
部と被溶接部位である第２板部材の開放側端部との間
に、第１円筒状部及び第２円筒状部に沿う前記各側部の
溶接時の熱が第１円筒状部及び第２円筒状部に直接伝達
されるのを阻止するための所定の隙間をそれぞれ設けた
ので、上記溶接した際の熱が第１筒状部及び第２筒状部
に直接伝達されることはない。このため、溶接時の熱に
よる歪みが第１筒状部及び第２筒状部（即ち、ブッシュ
支持部）に生ずることもない。従って、ブッシュ支持部
の精度ひいてはブッシュの取付精度が向上される。
【００１０】
【実施例】以下、図１〜図５を用いて、本発明の一実施
例について説明する。
【００１１】図５にはＬ型のサスペンションアーム１０
の底面図が示されており、又図３にはこのサスペンショ
ンアーム１０の一般断面構造を示す断面図が示されてい
る。これらの図に示されるように、サスペンションアー
ム１０は、断面コ字形とされかつアームアッパ側を構成
する上板部材１２（第１板部材）と、同じく断面コ字形
とされかつアームロア側を構成する下板部材１４（第２
板部材）と、によって構成されている。なお、上板部材
１２及び下板部材１４は、いずれも平面視で略Ｌ字形と
されている。
【００１２】また、上板部材１２の両側部１２Ａの内側
面間の距離は下板部材１４の両側部１４Ａの外側面間の
距離におよそ等しく設定されており、上板部材１２は下
板部材１４に長さＬ（図３参照）だけ上下方向で重なっ
ている。そして、下板部材１４に上板部材１２が上下に
重ね合わされた状態で、上板部材１２の両側部１２Ａの
端末部（即ち、両側部１２Ａの下端部）にて下板部材１
４の両側部１４Ａと上板部材１２の両側部１２Ａとが溶
接されている。なお、図２に溶接材１６が示されてい
る。これにより、サスペンションアーム１０は、断面略
矩形の閉断面構造に形成されている。
【００１３】ここで、上述したサスペンションアーム１
０の後端部に設けられたブッシュ支持部１８の構成につ
いて詳細に説明する。図２にはブッシュ支持部１８の２
−２線に沿った断面構造が示されており、又図１にはブ
ッシュ支持部１８にブッシュ２０が圧入された状態が一
部断面にして示されている。これらの図に示されるよう
に、上板部材１２の後端部にはバーリング加工が施され
ている。これにより、上板部材１２の後端部には、その
両側部１２Ａの他に、両側部１２Ａに沿ってアーム断面
内方へ折れ曲がる上側筒状部１２Ｂ（第１筒状部）が設
けられている。同様に、下板部材１４の後端部にも、バ
ーリング加工が施されている。これにより、下板部材１
４の後端部には、その両側部１４Ａの他に、両側部１４
Ａに沿ってアーム断面内方へ折れ曲がる下側筒状部１４
Ｂ（第２筒状部）が設けられている。
【００１４】上側筒状部１２Ｂの軸方向寸法及び下側筒
状部１４Ｂの軸方向寸法は略一致しており、又上側筒状
部１２Ｂの端部１２Ｂ’と下側筒状部１４Ｂの端部１４
Ｂ’とは互いに対向して配置されている。上述した上側
筒状部１２Ｂ及び下側筒状部１４Ｂによって円筒形のブ
ッシュ支持部１８が構成され、その内部にブッシュ２０
が圧入されている。なお、ブッシュ２０は、内筒２２及
び外筒２４並びに両者の間に介在されるゴム等の弾性体
２６から成り、車両上下方向が軸線方向とされている
（図１参照）。
【００１５】さらに、図２に示される如く、被溶接部位
である上板部材１２の側部１２Ａの内側面と、上側筒状
部１２Ｂの外側面との間には、間隙寸法Ｐの隙間２８が
形成されている。同様に、被溶接部位である下板部材１
４の側部１４Ａの内側面と、下側筒状部１４Ｂの外側面
との間には、間隙寸法Ｑの隙間３０が形成されている。
【００１６】なお、サスペンションアーム１０の前端部
には、図４（Ａ）、（Ｂ）にも示されるように、車両前
後方向を軸線方向とする円筒形のブッシュ支持部３２が
溶接により固着されている。つまり、ここで使用される
ブッシュ支持部３２は、これに圧入されるブッシュ（図
示省略）の軸線を前記の如く車両前後方向に設定する関
係で、上板部材１２及び下板部材１４のプレス方向と９
０度ずれることから、サスペンションアーム１０とは別
体とされている。また、サスペンションアーム１０のア
ウトボード側の端部には、車輪を支持するキャリア（図
示省略）の下端部が取り付けられる。
【００１７】次に、本実施例の作用並びに効果を説明す
る。
【００１８】断面コ字状の上板部材１２を断面コ字状の
下板部材１４に所定長さ上下方向で重ね合わせ、この状
態で上板部材１２の両側部１２Ａと下板部材１４の両側
部１４Ａとを溶接することにより、中空矩形閉断面構造
のＬ型のサスペンションアーム１０が構成される。サス
ペンションアーム１０が構成された段階では、各々バー
リング加工により設けられた上側筒状部１２Ｂの端部１
２Ｂ’と下側筒状部１４Ｂの端部１４Ｂ’とが互いに対
向して配置される。そして、この上側筒状部１２Ｂと下
側筒状部１４Ｂとによって構成された略円筒状のブッシ
ュ支持部１８内へ車両上下方向を軸線方向とするブッシ
ュ２０が圧入される。
【００１９】ここで、本実施例では、被溶接部位である
上板部材１２の側部１２Ａの内側面と上側筒状部１２Ｂ
の外側面との間に間隙寸法Ｐの隙間２８を形成すると共
に、同じく被溶接部位である下板部材１４の側部１４Ａ
の内側面と下側筒状部１４Ｂの外側面との間に間隙寸法
Ｑの隙間３０を形成したので、上板部材１２の両側部１
２Ａと下板部材１４の両側部１４Ａとを溶接した際の熱
は、上側筒状部１２Ｂ及び下側筒状部１４Ｂには直接伝
達されない。このため、溶接時の熱による歪みが上側筒
状部１２Ｂ及び下側筒状部１４Ｂに生ずることもない。
従って、本実施例によれば、ブッシュ支持部１８の精度
ひいてはブッシュ２０の取付精度を向上させることがで
きる。なお、本実施例では、上側筒状部１２Ｂの端部１
２Ｂ’と下側筒状部１４Ｂの端部１４Ｂ’とを対向配置
し、両者を溶接しない構造としているが、この点もブッ
シュ支持部１８に溶接による熱の影響を及ぼさないとい
う意味で、功を奏している。
【００２０】また、本実施例では、上板部材１２及び下
板部材１４の双方にバーリングによる上側筒状部１２Ｂ
及び下側筒状部１４Ｂを設けているので、上側筒状部１
２Ｂ及び下側筒状部１４Ｂの各バーリング長を短くする
ことができる。このため、加工が容易になると共に、ブ
ッシュ２０を圧入するために必要な精度を容易に確保す
ることができる。さらに、この構成を採ることにより、
ブッシュ支持部１８付近のアーム断面構造が二重円筒形
になるので、ブッシュ支持部１８の強度を高めることが
できる。
【００２１】なお、本実施例では、図２に示される如
く、上側筒状部１２Ｂの端部１２Ｂ’及び下側筒状部１
４Ｂの端部１４Ｂ’を屈曲させることなく直線的に加工
しているが、これに限らず、図６に示される如く、上側
筒状部１２Ｂの端部１２Ｂ’及び下側筒状部１４Ｂの端
部１４Ｂ’を予めブッシュ支持部１８の半径方向外側へ
屈曲させておいてもよい。この場合、ブッシュ支持部１
８内へブッシュ２０を圧入する際に、ブッシュ２０の外
筒２４が上側筒状部１２Ｂの端部１２Ｂ’及び下側筒状
部１４Ｂの端部１４Ｂ’に引っ掛からないというメリッ
トがある。
【００２２】また、本実施例では、Ｌ型のサスペンショ
ンアーム１０に本発明を適用したが、これに限らず、種
々のサスペンションアームに本発明を適用することが可
能である。
【００２３】
【発明の効果】以上説明したように本発明に係るサスペ
ンションアームは、第１板部材の所定部位を側部より内
側でアーム断面内方へ折り曲げることにより設けられた
第１円筒状部と、第２板部材の所定部位を側部より内側
でアーム断面内方へ折り曲げることにより設けられかつ
端部が第１円筒状部の端部と互いに対向して配置された
第２円筒状部と、によってブッシュ支持部を構成すると
共に、さらに、第１円筒状部と被溶接部位である第１板
部材の側部との間及び第２円筒状部と被溶接部位である
側部との間に、第１円筒状部及び第２円筒状部に沿う前
記各側部の溶接時の熱が第１円筒状部及び第２円筒状部
に直接伝達されるのを阻止するための所定の隙間をそれ
ぞれ設けたので、ブッシュ支持部の精度を高めることが
できるという優れた効果を有する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side portion of a first plate member having a U-shaped cross section and a side portion of a second plate member having a U-shaped cross section. The present invention relates to a suspension arm having a cylindrical bush support having an axial direction extending from the first plate member to the second plate member. 2. Description of the Related Art There are various suspension types, such as a double wishbone type, a strut type, a multi-link type, and a trailing arm type. Correspondingly, there are various types of suspension arms constituting the suspension. From the viewpoint of the shape, there are an A-shaped arm, an L-shaped arm, an I-shaped arm and the like, and from the viewpoint of the structure, there are a pipe-shaped one, a steel plate pressed or an aluminum forged one. As described above, there are various types of suspension arms. Among them, a suspension arm formed by welding two pressed plate members to each other will be briefly described below. I do. An example of this type of suspension arm is disclosed in Toyota Technical Publication No. 4450 (issued on Feb. 28, 1992). FIG. 7 is a front view of an L-shaped lower arm 100 which is a suspension arm disclosed in the above publication. As shown in this drawing, the L-shaped lower arm 100 is provided with an upper plate member 10 constituting an arm upper side.
2 and a lower plate member 104 constituting the arm lower side, and are formed by welding the open side ends 102A, 104A of both sides. Further, a cylindrical bush support portion 106 having an axis in the vertical direction is attached to an end of the L-shaped lower arm 100 on the inboard side by welding. A bush (not shown) is press-fitted into the bush support portion 106. [0005] However, in the case of the above configuration, heat generated when the bush support portion 106 is welded to the inboard end of the L-shaped lower arm 100 is directly transmitted to the bush support portion 106. There is a problem that it is done. In this case, since it is necessary to consider the distortion of the bush support portion 106 due to heat, it becomes difficult to secure the mounting accuracy of the bush support portion 106 (and, consequently, the axial accuracy of the bush pressed into the bush support portion 106). In view of the above, an object of the present invention is to provide a suspension arm capable of improving the accuracy of a bush support. According to the present invention, a side portion of a first plate member having a U-shaped cross section is welded to a side portion of a second plate member having a U-shaped cross section. An arm having a hollow rectangular closed-section structure is configured by: a suspension arm having a cylindrical bush support portion whose axial direction is substantially the direction from the first plate member to the second plate member, wherein the bush support portion is A first cylindrical portion provided by bending a predetermined portion of the first plate member inward of the arm inward from the side, and a predetermined portion of the second plate member is bent inward of the arm inward of the side. And the end is first
An end of the cylindrical portion and a second cylindrical portion disposed to face each other, and further between the first cylindrical portion and a side portion of the first plate member which is a portion to be welded. And between the second cylindrical portion and the side portion which is the portion to be welded, heat generated at the time of welding each side portion along the first cylindrical portion and the second cylindrical portion is the first.
It is characterized in that predetermined gaps for preventing direct transmission to the cylindrical portion and the second cylindrical portion are provided, respectively. According to the above construction, a hollow portion is formed by welding the side portion of the first plate member having a U-shaped cross section and the side portion of the second plate member having a U-shaped cross section. A suspension arm having a rectangular closed section structure is configured. Further, a first cylindrical portion provided by bending a predetermined portion of the first plate member inward of the arm cross section inside the side portion, and a predetermined cylindrical portion of the second plate member inside the arm cross section inside the side portion. The bush support portion is constituted by the second cylindrical portion which is provided by being bent to the side and whose end portion is arranged opposite to the end portion of the first cylindrical portion. The bush is press-fitted into the bush support having such a configuration. Here, according to the present invention, the first tubular member is located between the open end of the first plate member, which is the portion to be welded, and the second tubular member is located between the open end of the second plate member, which is the portion to be welded. Between the open side end, the heat at the time of welding of each side along the first cylindrical portion and the second cylindrical portion is directly transmitted to the first cylindrical portion and the second cylindrical portion. Since the predetermined gaps for blocking are provided, the heat at the time of welding is not directly transmitted to the first cylindrical portion and the second cylindrical portion. Therefore, distortion due to heat during welding does not occur in the first tubular portion and the second tubular portion (that is, the bush support portion). Therefore, the accuracy of the bush support portion and the mounting accuracy of the bush are improved. An embodiment of the present invention will be described below with reference to FIGS. FIG. 5 shows an L-shaped suspension arm 10.
3 is a cross-sectional view showing a general cross-sectional structure of the suspension arm 10. As shown in FIG. As shown in these drawings, the suspension arm 10 has a U-shaped cross section and an upper plate member 12 (first plate member) forming an arm upper side, and a lower arm also having a U-shaped cross section and forming an arm lower side. Plate member 14 (second
Plate member). Each of the upper plate member 12 and the lower plate member 14 is substantially L-shaped in plan view. The distance between the inner side surfaces of both side portions 12A of the upper plate member 12 is set substantially equal to the distance between the outer side surfaces of both side portions 14A of the lower plate member 14. 14 in the vertical direction by a length L (see FIG. 3). Then, in a state where the upper plate member 12 is vertically overlapped on the lower plate member 14, the lower plate member 1 is formed at the terminal portions of the both side portions 12A of the upper plate member 12 (that is, the lower ends of the both side portions 12A).
4 are welded to both side portions 14A of the upper plate member 12. In addition, the welding material 16 is shown in FIG. Thereby, the suspension arm 10 is formed in a closed cross-sectional structure having a substantially rectangular cross section. Here, the suspension arm 1 described above is used.
The configuration of the bush support portion 18 provided at the rear end of the “0” will be described in detail. FIG.
A cross-sectional structure along line -2 is shown, and FIG. 1 shows a state in which the bush 20 is pressed into the bush support portion 18 in a partial cross section. As shown in these drawings, the rear end of the upper plate member 12 is subjected to burring. Accordingly, at the rear end of the upper plate member 12, in addition to the both sides 12A, an upper cylindrical part 12B (first cylindrical part) that bends inward in the arm section along the both sides 12A is provided. I have. Similarly, the rear end of the lower plate member 14 is also subjected to burring. Thereby, the lower plate member 1
4 has two side portions 14A in addition to the two side portions 14A.
A lower cylindrical portion 14 that is bent inward along the arm section along A
B (second cylindrical portion) is provided. The axial dimension of the upper tubular portion 12B and the axial dimension of the lower tubular portion 14B are substantially the same, and the end 12B 'of the upper tubular portion 12B and the end of the lower tubular portion 14B. Part 14
B ′ are arranged to face each other. The above-described upper tubular portion 12B and lower tubular portion 14B constitute a cylindrical bush support portion 18, in which a bush 20 is provided.
Is press-fitted. The bush 20 includes an inner cylinder 22 and an outer cylinder 24 and an elastic body 26 such as rubber interposed between the two, and the vertical direction of the vehicle is the axial direction (see FIG. 1). Further, as shown in FIG. 2, a gap 28 having a gap dimension P is provided between the inner surface of the side portion 12A of the upper plate member 12, which is the portion to be welded, and the outer surface of the upper cylindrical portion 12B. Is formed. Similarly, the lower plate member 1 which is a portion to be welded
A gap 30 having a gap dimension Q is formed between the inner surface of the side portion 14A of the fourth member 4 and the outer surface of the lower cylindrical portion 14B. As shown in FIGS. 4 (A) and 4 (B), a cylindrical bush support portion 32 having the vehicle longitudinal direction as the axial direction is fixed to the front end of the suspension arm 10 by welding. ing. In other words, the bush support portion 32 used here has a pressing direction of the upper plate member 12 and the lower plate member 14 in a relation that the axis of the bush (not shown) pressed into the bush support portion 32 is set in the vehicle front-rear direction as described above. And 9
Because it is shifted by 0 degrees, it is separate from the suspension arm 10. A lower end of a carrier (not shown) that supports wheels is attached to an end of the suspension arm 10 on the outboard side. Next, the operation and effect of this embodiment will be described. The upper plate member 12 having a U-shaped cross section is vertically overlapped with the lower plate member 14 having a U-shaped cross section by a predetermined length, and in this state, both sides 12A of the upper plate member 12 and both sides of the lower plate member 14 are provided. The L-shaped suspension arm 10 having a hollow rectangular closed cross-sectional structure is formed by welding the portion 14A. At the stage when the suspension arm 10 is constructed, the end portion 1 of the upper cylindrical portion 12B provided by burring is provided.
2B 'and the end 14B' of the lower cylindrical portion 14B are arranged to face each other. Then, a bush 20 whose axial direction is in the vehicle vertical direction is press-fitted into a substantially cylindrical bush support portion 18 constituted by the upper cylindrical portion 12B and the lower cylindrical portion 14B. In this embodiment, the inner side surface of the side portion 12A of the upper plate member 12 and the upper cylindrical portion 12B are welded portions.
And a side portion 14A of the lower plate member 14, which is a portion to be welded.
Is formed between the inner side surface of the upper plate member 12 and the outer side surface of the lower cylindrical portion 14B.
Heat generated when welding 2A and both side parts 14A of lower plate member 14 is not directly transmitted to upper tubular part 12B and lower tubular part 14B. Therefore, distortion due to heat during welding does not occur in the upper cylindrical portion 12B and the lower cylindrical portion 14B.
Therefore, according to the present embodiment, it is possible to improve the accuracy of the bush support portion 18 and the mounting accuracy of the bush 20. In this embodiment, the end portion 1 of the upper cylindrical portion 12B is used.
2B 'and the end 14B' of the lower cylindrical portion 14B are arranged to face each other, and the two are not welded. However, this point is also effective in that the heat generated by welding does not affect the bush support portion 18. Is playing. In this embodiment, both the upper plate member 12 and the lower plate member 14 are provided with burring upper cylindrical portions 12B.
And the lower tubular portion 14B, the upper tubular portion 1
Each burring length of 2B and lower cylindrical part 14B can be shortened. For this reason, processing becomes easy, and the precision required for press-fitting the bush 20 can be easily secured. Furthermore, by adopting this configuration,
Since the cross-sectional structure of the arm near the bush support portion 18 has a double cylindrical shape, the strength of the bush support portion 18 can be increased. In this embodiment, as shown in FIG. 2, the end portion 12B 'of the upper tubular portion 12B and the lower tubular portion 1
Although the end portion 14B 'of the 4B is processed linearly without bending, the present invention is not limited to this. As shown in FIG. 6, the end portion 12B' of the upper tubular portion 12B and the lower tubular portion 14B are formed. The end 14B 'may be bent outward in the radial direction of the bush support 18 in advance. In this case, the bush support 1
When the bush 20 is press-fitted into the bush 8, there is an advantage that the outer cylinder 24 of the bush 20 is not caught on the end 12B 'of the upper tubular portion 12B and the end 14B' of the lower tubular portion 14B. In the present embodiment, the present invention is applied to the L-shaped suspension arm 10. However, the present invention is not limited to this, and the present invention can be applied to various suspension arms. As described above, the suspension arm according to the present invention has a first cylindrical portion provided by bending a predetermined portion of the first plate member inwardly from the side of the first plate member to the cross section of the arm. And a second cylindrical portion provided by bending a predetermined portion of the second plate member inward of the arm cross section inside the side portion, and the end portion of which is arranged to face the end portion of the first cylindrical portion. And a bush support portion, and further, a portion between the first cylindrical portion and the side portion of the first plate member which is the portion to be welded, and a portion between the second cylindrical portion and the side portion which is the portion to be welded. In the meantime, a predetermined temperature for preventing heat at the time of welding the respective side portions along the first cylindrical portion and the second cylindrical portion from being directly transmitted to the first cylindrical portion and the second cylindrical portion. Since the gaps are provided, the accuracy of the bush support can be improved Have an excellent effect.
【図面の簡単な説明】
【図１】本実施例に係るサスペンションアームにおける
ブッシュ支持部付近を一部切断すると共に図５の矢印Ｘ
方向から見て示す側面図である。
【図２】図１に示されるブッシュ支持部を図５の２−２
線に沿って切断して示す断面図である。
【図３】図１に示されるサスペンションアームの一般部
を図５の３−３線に沿って切断して示す断面図である。
【図４】（Ａ）は別体で構成されたブッシュ支持部の取
付状態を図５の矢印Ｙ方向から見て示す側面図であり、
（Ｂ）はその平面図である。
【図５】本実施例に係るサスペンションアームの全体構
成を示す平面図である。
【図６】変形例に係るブッシュ支持部の構造を示す図２
に対応する断面図である。
【図７】従来例に係るサスペンションアームの構成を示
す斜視図である。
【符号の説明】
１０ サスペンションアーム
１２ 上板部材（第１板部材）
１２Ａ 側部
１２Ｂ 上側筒状部（第１円筒状部）
１４ 下板部材（第２板部材）
１４Ａ 側部
１４Ｂ 下側筒状部（第２円筒状部）
１８ ブッシュ支持部
２８ 隙間
３０ 隙間BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a suspension arm according to the present embodiment in which a portion near a bush support portion is partially cut and an arrow X in FIG.
It is a side view shown seen from a direction. FIG. 2 is a perspective view of the bush support shown in FIG.
It is sectional drawing cut | disconnected and shown along a line. FIG. 3 is a cross-sectional view showing a general portion of the suspension arm shown in FIG. 1 along a line 3-3 in FIG. FIG. 4A is a side view showing a mounting state of a bush supporting portion formed separately as viewed from the direction of arrow Y in FIG. 5;
(B) is a plan view thereof. FIG. 5 is a plan view showing the overall configuration of the suspension arm according to the embodiment. FIG. 6 is a view showing a structure of a bush support according to a modification;
It is sectional drawing corresponding to FIG. FIG. 7 is a perspective view showing a configuration of a suspension arm according to a conventional example. DESCRIPTION OF SYMBOLS 10 Suspension arm 12 Upper plate member (first plate member) 12A Side portion 12B Upper cylindrical portion (first cylindrical portion) 14 Lower plate member (second plate member) 14A Side portion 14B Lower cylinder -Shaped part (second cylindrical part) 18 Bush support part 28 Gap 30 Gap
───────────────────────────────────────────────────── フロントページの続き (72)発明者 上野 行一 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 Ｆターム(参考） 3D001 AA18 DA04 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yuichi Ueno 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto Inside the car company F term (reference) 3D001 AA18 DA04
Claims (1)
断面コ字状とされた第２板部材の側部とを溶接すること
により中空矩形閉断面構造のアームが構成され、およそ
第１板部材から第２板部材へ向かう方向を軸線方向とす
る円筒状のブッシュ支持部を有するサスペンションアー
ムであって、 前記ブッシュ支持部は、第１板部材の所定部位を側部よ
り内側でアーム断面内方へ折り曲げることにより設けら
れた第１円筒状部と、第２板部材の所定部位を側部より
内側でアーム断面内方へ折り曲げることにより設けられ
かつ端部が第１円筒状部の端部と互いに対向して配置さ
れた第２円筒状部と、によって構成されており、 さらに、第１円筒状部と被溶接部位である第１板部材の
側部との間及び第２円筒状部と被溶接部位である側部と
の間に、第１円筒状部及び第２円筒状部に沿う前記各側
部の溶接時の熱が第１円筒状部及び第２円筒状部に直接
伝達されるのを阻止するための所定の隙間をそれぞれ設
けた、 ことを特徴とするサスペンションアーム。Claims: 1. A hollow rectangular closed cross section by welding a side portion of a first plate member having a U-shaped cross section and a side portion of a second plate member having a U-shaped cross section. A suspension arm having a cylindrical bush support having an axial direction substantially in a direction from the first plate member to the second plate member, wherein the bush support portion is provided on the first plate member. A first cylindrical portion provided by bending a predetermined portion inside the arm cross section inside the side portion, and a first cylindrical portion provided by bending a predetermined portion of the second plate member inside the arm cross section inside the side portion; An end portion is constituted by an end portion of the first cylindrical portion and a second cylindrical portion arranged to be opposed to each other. Furthermore, the first cylindrical portion and the first plate member which is a portion to be welded. Between the side portions and between the second cylindrical portion and the portion to be welded. Between the first cylindrical portion and the second cylindrical portion along the first cylindrical portion and the second cylindrical portion, and prevents heat at the time of welding of each side portion from being directly transmitted to the first cylindrical portion and the second cylindrical portion. Suspension arms provided with predetermined gaps for the suspension arms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002151068A JP2003019907A (en) | 2002-05-24 | 2002-05-24 | Suspension arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002151068A JP2003019907A (en) | 2002-05-24 | 2002-05-24 | Suspension arm |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7106185A Division JPH08295111A (en) | 1995-04-28 | 1995-04-28 | Suspension arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003019907A true JP2003019907A (en) | 2003-01-21 |
Family
ID=19194743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002151068A Pending JP2003019907A (en) | 2002-05-24 | 2002-05-24 | Suspension arm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003019907A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112009002697T5 (en) | 2008-11-05 | 2013-03-28 | F. Tech Incorporation | Vehicle suspension handlebar in L-type |
| JP2013082341A (en) * | 2011-10-11 | 2013-05-09 | Toyota Motor Corp | Suspension arm |
| US20150266350A1 (en) * | 2014-03-20 | 2015-09-24 | Toyota Jidosha Kabushiki Kaisha | Suspension arm |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3121348A (en) * | 1961-11-28 | 1964-02-18 | Paul J Reed | Torque rod |
| DE4132779A1 (en) * | 1991-10-02 | 1993-04-08 | Vorwerk & Sohn | Axle crossbeam for goods vehicle - has two bearing heads formed by identical half shells welded together |
| JPH06143953A (en) * | 1992-11-02 | 1994-05-24 | Toyota Motor Corp | Suspension arm |
| JPH06264967A (en) * | 1993-03-11 | 1994-09-20 | Toyoda Gosei Co Ltd | Engine mount |
-
2002
- 2002-05-24 JP JP2002151068A patent/JP2003019907A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3121348A (en) * | 1961-11-28 | 1964-02-18 | Paul J Reed | Torque rod |
| DE4132779A1 (en) * | 1991-10-02 | 1993-04-08 | Vorwerk & Sohn | Axle crossbeam for goods vehicle - has two bearing heads formed by identical half shells welded together |
| JPH06143953A (en) * | 1992-11-02 | 1994-05-24 | Toyota Motor Corp | Suspension arm |
| JPH06264967A (en) * | 1993-03-11 | 1994-09-20 | Toyoda Gosei Co Ltd | Engine mount |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112009002697T5 (en) | 2008-11-05 | 2013-03-28 | F. Tech Incorporation | Vehicle suspension handlebar in L-type |
| US8414003B2 (en) | 2008-11-05 | 2013-04-09 | F. Tech Incorporation | Vehicular L-type suspension arm |
| JP2013082341A (en) * | 2011-10-11 | 2013-05-09 | Toyota Motor Corp | Suspension arm |
| US20150266350A1 (en) * | 2014-03-20 | 2015-09-24 | Toyota Jidosha Kabushiki Kaisha | Suspension arm |
| US9421838B2 (en) * | 2014-03-20 | 2016-08-23 | Toyota Jidosha Kabushiki Kaisha | Suspension arm |
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