JPS62265085A - Frame for car such as motorcycle - Google Patents
Frame for car such as motorcycleInfo
- Publication number
- JPS62265085A JPS62265085A JP10814686A JP10814686A JPS62265085A JP S62265085 A JPS62265085 A JP S62265085A JP 10814686 A JP10814686 A JP 10814686A JP 10814686 A JP10814686 A JP 10814686A JP S62265085 A JPS62265085 A JP S62265085A
- Authority
- JP
- Japan
- Prior art keywords
- head pipe
- main
- pipe
- frame structure
- motorcycle
- 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.)
- Granted
Links
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（Ｓ乗上の利用分野〕
本発明は、自動二輪車等の車両に用いられるフレームに
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of application for S-riding) The present invention relates to a frame used for a vehicle such as a motorcycle.
この種のフレームでは、ステアリングヘッドパイプとこ
こからリヤアームの枢支部に向って延びるメインパイプ
との連結部分に、充分な強度と剛性が要求される。この
ことから、従来、上記メインパイプをその断面形状が上
下方向に縦長となる偏平な角筒形に形成するとともに、
ステアリングヘッドパイプに連なる前端部を後方側に比
べて太く大きな中空箱形に形成したものが知られている
。In this type of frame, sufficient strength and rigidity are required for the connecting portion between the steering head pipe and the main pipe extending from the steering head pipe toward the pivot portion of the rear arm. For this reason, conventionally, the main pipe has been formed into a flat rectangular cylinder whose cross section is vertically elongated, and
It is known that the front end connected to the steering head pipe is formed into a hollow box shape that is thicker and larger than the rear end.
ところが、車両の運動性能を＾めるためには、剛性面ば
かりでなく、フレームの軽量化を図ることも重要な課題
であり、上記従来のフレームでは、この軽層化と高剛性
の両立を図る点において、いま−要改善の余地があった
。However, in order to improve the dynamic performance of a vehicle, it is important not only to improve the rigidity but also to reduce the weight of the frame, and with the conventional frames mentioned above, it is difficult to achieve both lightness and high rigidity. There was room for improvement in terms of this.
そこで、本発明においては、フロントフォークを枢支す
るステアリングヘッドパイプに、このステアリングヘッ
ドパイプに連なる前端部が中空の箱形に形成されたメイ
ンフレーム構体を突き合わせて溶接するに当り、
上記ステアリングヘッドパイプの周面に、上記メインフ
レーム構体の前端部で囲まれる範囲内に開口する肉抜き
孔を穿設したことを特徴とする。Therefore, in the present invention, when welding the main frame structure, which has a hollow box-shaped front end connected to the steering head pipe, to the steering head pipe that pivotally supports the front fork, the above-mentioned steering head pipe is welded. The main frame structure is characterized in that a lightening hole is formed in the circumferential surface of the main frame structure, the hole opening within a range surrounded by the front end of the main frame structure.
この構成によれば、ステアリングヘッドパイプに穿設し
た肉抜き孔が、メインフレーム構体とステアリングヘッ
ドパイプとの溶接合せ部に位置することはなく、これら
両者の接合面積や溶接長をこれまでと同等に確保するこ
とができる。According to this configuration, the lightening hole drilled in the steering head pipe is not located at the weld joint between the main frame structure and the steering head pipe, and the joint area and weld length between the two are the same as before. can be secured.
したがっＣ、ステアリングヘッドパイプとメインフレー
ム構体との連結部分の剛性や強度を坦状通り充分に確保
しつつ、ステアリングヘッドパイプの無駄な肉を極力取
去ることができ、その分、フレームの軽量が可能となる
。Therefore, while ensuring sufficient rigidity and strength of the connecting part between the steering head pipe and the main frame structure, it is possible to remove as much unnecessary meat from the steering head pipe as possible, which reduces the weight of the frame. It becomes possible.
以下本発明の一実施例を、自動二輪車に適用した図面に
もとづいて説明する。An embodiment of the present invention will be described below based on drawings in which the present invention is applied to a motorcycle.
図中符号１はアルミ合金製のフレームであり、その前端
に縦置きされたステアリングヘッドパイプ２ （以下ヘ
ッドパイプと称する）にはフロントフォーク３が枢支さ
れている。このヘッドパイプ２には後方に向って延びる
メインフレーム構体４が連結されており、本実施例のメ
インフレーム構体４は、ヘッドパイプ２とリヤアーム５
を枢支するブラケット６との間を、側面視略−直線状に
結ぶ左右一対のメインパイプ７．７を備えている。Reference numeral 1 in the figure is an aluminum alloy frame, and a front fork 3 is pivotally supported by a steering head pipe 2 (hereinafter referred to as head pipe) placed vertically at the front end of the frame. A main frame structure 4 extending rearward is connected to the head pipe 2, and the main frame structure 4 of this embodiment includes the head pipe 2 and the rear arm 5.
A pair of left and right main pipes 7.7 are provided which connect the main pipes 7.7 to the bracket 6 which pivotally supports the main pipes 7 and 7 in a substantially straight line when viewed from the side.
このメインパイプ７．１は第３図に示すように、断面口
字形をなした一対のフレーム素材７ａ、 ７ｂを左右方
向から衝合して溶接したもので、その断面形状が上下方
向に縦長となる偏平な角筒形に形成されている。そして
、メインパイプ７．７の前端部の縦方向寸法は、ヘッド
パイプ２の軸長と略等しく形成されており、このメイン
パイプ１．７の前端開口部がヘッドパイプ２の周面に突
き合わされている。As shown in Fig. 3, this main pipe 7.1 is made by welding a pair of frame materials 7a and 7b, each of which has a cross-sectional shape, from the left and right sides, and its cross-sectional shape is vertically elongated in the vertical direction. It is formed into a flat prismatic cylinder shape. The vertical dimension of the front end of the main pipe 7.7 is approximately equal to the axial length of the head pipe 2, and the front end opening of the main pipe 1.7 is butted against the circumferential surface of the head pipe 2. ing.
ヘッドパイプ２の周面には、メインパイプ７゜１の突き
合わせ位置を案内でるだめの案内壁８゜８が軸方向に沿
って突設されており、この案内壁８．８はメインパイプ
７．７の前端開口部に導入されて、その外側部内面に重
ね合わされている。A guide wall 8.8 is provided on the circumferential surface of the head pipe 2 to protrude along the axial direction to guide the abutting position of the main pipe 7.1. 7 and is superimposed on the inner surface of its outer side.
そして、メインパイプ７．７はその前端開口部の外側縁
部から上下縁部に亘る範囲をヘッドパイプ２の周面に連
続して溶接することで固着されており、このメインパイ
プ７．７はヘッドパイプ２の直後において左右方向に拡
開されて後方に延びている。The main pipe 7.7 is fixed by continuous welding to the circumferential surface of the head pipe 2 from the outer edge of the front end opening to the upper and lower edges. Immediately after the head pipe 2, it is expanded in the left-right direction and extends rearward.
メインパイプ７．７の前端部上面および下面には、略三
角形状をなした補強プレート９，１０が重ね合わせて溶
接されており、この上下の補強プレート９．１０の前縁
部はヘッドパイプ２の周面に突き合わせ溶接されている
。また、補強プレート９゜１０の後縁部間にはバックプ
レート１１が溶接されており、このバックプレート１１
の左右両側縁部はメインパイプ７．７の内側面に溶接さ
れている。Reinforcement plates 9 and 10 having substantially triangular shapes are superimposed and welded to the upper and lower surfaces of the front end of the main pipe 7.7, and the front edges of the upper and lower reinforcement plates 9.10 are attached to the head pipe 2. butt welded to the circumferential surface of the Further, a back plate 11 is welded between the rear edges of the reinforcing plates 9 and 10, and this back plate 11
The left and right side edges of are welded to the inner surface of the main pipe 7.7.
したがって、メインフレーム構体４の前端部は、上記メ
インパイプ７．７、補強プレート９．１０およびバック
プレート１１によって中空の箱形に組立てられており、
この箱形部１２の前端部はヘッドパイプ２に連なってい
る。Therefore, the front end of the main frame structure 4 is assembled into a hollow box shape by the main pipe 7.7, the reinforcing plate 9.10, and the back plate 11.
The front end of this box-shaped portion 12 is connected to the head pipe 2.
ところで、上記ヘッドパイプ２の周面には、このヘッド
パイプ２の中心を通り、かつ前後方向に沿う中心線Ｘ１
−Ｘｓの左右両側に位置して、例えば３個の肉抜き孔１
３・・・が軸方向に間隔を存して穿設されている。これ
ら肉抜き孔１３・・・はヘッドパイプ２の鋳造成形後に
機械加工により孔開けしたもので、上記中空な箱形部１
２で囲まれる範囲内に開口されている。すなわち、この
肉抜き孔１３・・・はメインパイプ７．１および上下の
補強プレート９゜１０とヘッドパイプ２との溶接合せ部
を外れた位置に設けられており、その略半分がメインパ
イプ７゜１内に開口されているとともに、残りの半分が
箱形部１２内に開口されている。By the way, on the circumferential surface of the head pipe 2, there is a center line X1 passing through the center of the head pipe 2 and along the front-rear direction.
- Located on both the left and right sides of Xs, for example, 3 lightening holes 1
3... are bored at intervals in the axial direction. These hollow holes 13 are made by machining after the head pipe 2 is cast and formed, and the hollow box-shaped portion 1
It is opened within the range surrounded by 2. That is, the lightening holes 13 are provided at positions outside the welded joints between the main pipe 7.1 and the upper and lower reinforcing plates 9.10 and the head pipe 2, and approximately half of them are located outside the main pipe 7.1 and the welded joints between the upper and lower reinforcing plates 9. 1, and the remaining half is opened into the box-shaped part 12.
なお、メインパイプ１．１の前端下面とブラケット６と
の間には、左右のダウンチューブ１４が架設されており
、これらダウンチューブ１４とメインパイプ７．７との
間にエンジン１５が搭載されている。Note that left and right down tubes 14 are installed between the lower surface of the front end of the main pipe 1.1 and the bracket 6, and an engine 15 is mounted between these down tubes 14 and the main pipe 7.7. There is.
このような構成によれば、ヘッドパイプ２の周面に穿設
した肉抜き孔１３・・・は、左右のメインパイプ７．７
および上下の補強プレート９，１ｏによって囲まれる範
囲内に開口するので、この肉抜き孔１３・・・がメイン
フレーム構体４とヘッドパイプ２との溶接合せ部上に位
置することはなく、これら両者の接合面積や溶接長さを
これまでと同等に確保することができる。According to such a configuration, the lightening holes 13 formed in the circumferential surface of the head pipe 2 are connected to the left and right main pipes 7.7.
and the upper and lower reinforcing plates 9, 1o, so that the lightening holes 13 are not located above the welded joint between the main frame structure 4 and the head pipe 2, and both The joint area and welding length can be maintained at the same level as before.
したがって、ヘッドパイプ２とメインフレーム構体４と
の連結部分の剛性や強度を充分に確保しつつ、ヘッドパ
イプ２の無駄な肉を取り去ることができ、その分、フレ
ーム１の軽量化が可能となる。Therefore, while ensuring sufficient rigidity and strength of the connecting portion between the head pipe 2 and the main frame structure 4, unnecessary flesh of the head pipe 2 can be removed, and the weight of the frame 1 can be reduced accordingly. .
なお、上述した実施例では、メインパイプの外側縁部か
ら上下縁部に亘る範囲をヘッドパイプに溶接したが、場
合によっては、メインパイプの内側縁部もヘッドパイプ
の肉抜き孔間の壁面部分に溶接しても良い。In the above embodiment, the range from the outer edge to the upper and lower edges of the main pipe was welded to the head pipe, but in some cases, the inner edge of the main pipe may also be welded to the wall surface between the lightening holes of the head pipe. It may be welded to
また、上述した実施例では、メインパイプの前端部を直
接ヘッドパイプに連続させ、このメインパイプ、上下の
補強パネルおよびバックプレートにより箱形部を構成し
たが、本発明はこれに限らず、例えばヘッドパイプに複
数枚のパネル材を箱組みした箱形部を溶接し、この箱形
部の後面両側１３・・・肉抜き孔。Furthermore, in the above embodiment, the front end of the main pipe is directly connected to the head pipe, and the main pipe, the upper and lower reinforcing panels, and the back plate constitute a box-shaped part. However, the present invention is not limited to this, and for example, A box-shaped section made by assembling a plurality of panel materials is welded to the head pipe, and holes 13 on both sides of the rear surface of this box-shaped section are formed.
部に左右のメインパイプを溶接しても良い。The left and right main pipes may be welded to the section.
さらに、本発明に係るフレームは、自動二輪車用に限ら
ず、後輪が二輪の自動三輪車であっても同様に実施可能
である。Further, the frame according to the present invention is not limited to use in a motorcycle, but can be similarly applied to a tricycle having two rear wheels.
以上詳述した本発明によれば、ステアリングヘッドパイ
プとメインフレーム構体との連結部分に充分な剛性や強
度を確保しつつ、ヘッドパイプの無駄な肉を取り去るこ
とができ、その分、フレームを軽量化することができる
。According to the present invention described in detail above, while ensuring sufficient rigidity and strength at the connecting portion between the steering head pipe and the main frame structure, unnecessary meat of the head pipe can be removed, making the frame lighter by that amount. can be converted into
図面は本発明の一実施例を示し、第１図はステアリング
ヘッドパイプとメインフレーム構体との連結部分の断面
図、第２図は同じくその平面図、第３図は第２図中■−
■線に沿う断面図、第４図は第２図中ＩＶ −ＩＶ線に
沿う断面図、第５図はステアリングヘッドパイプの側面
図、第６図は自動二輪車の側面図である。The drawings show one embodiment of the present invention, in which Fig. 1 is a cross-sectional view of the connecting portion between the steering head pipe and the main frame structure, Fig. 2 is a plan view thereof, and Fig. 3 is a section (■-- in Fig. 2).
4 is a sectional view taken along line IV--IV in FIG. 2, FIG. 5 is a side view of the steering head pipe, and FIG. 6 is a side view of the motorcycle.
Claims (1)
に、このステアリングヘッドパイプに連なる前端部が中
空の箱形に形成されたメインフレーム構体を突き合わせ
て溶接した自動二輪車等の車両用フレームにおいて、 上記ステアリングヘッドパイプの周面に、上記メインフ
レーム構体の前端部で囲まれる範囲内に開口する肉抜き
孔を穿設したことを特徴とする自動二輪車等の車両用フ
レーム。[Claims] In a frame for a vehicle such as a motorcycle, in which a main frame structure, the front end of which is connected to the steering head pipe and is formed in a hollow box shape, is butt-welded to a steering head pipe that pivotally supports a front fork. A frame for a vehicle such as a motorcycle, characterized in that a lightening hole is formed in the circumferential surface of the steering head pipe and opens within a range surrounded by the front end of the main frame structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61108146A JPH0774021B2 (en) | 1986-05-12 | 1986-05-12 | Frame for vehicles such as motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61108146A JPH0774021B2 (en) | 1986-05-12 | 1986-05-12 | Frame for vehicles such as motorcycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62265085A true JPS62265085A (en) | 1987-11-17 |
| JPH0774021B2 JPH0774021B2 (en) | 1995-08-09 |
Family
ID=14477104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61108146A Expired - Fee Related JPH0774021B2 (en) | 1986-05-12 | 1986-05-12 | Frame for vehicles such as motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0774021B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0416806A (en) * | 1990-05-10 | 1992-01-21 | Sumitomo Electric Ind Ltd | Optical fiber and production thereof |
| JPH0478358U (en) * | 1990-11-20 | 1992-07-08 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5534938U (en) * | 1978-08-29 | 1980-03-06 |
-
1986
- 1986-05-12 JP JP61108146A patent/JPH0774021B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5534938U (en) * | 1978-08-29 | 1980-03-06 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0416806A (en) * | 1990-05-10 | 1992-01-21 | Sumitomo Electric Ind Ltd | Optical fiber and production thereof |
| JPH0478358U (en) * | 1990-11-20 | 1992-07-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0774021B2 (en) | 1995-08-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |