JPH06518B2 - Motorcycle frame - Google Patents

Motorcycle frame

Info

Publication number
JPH06518B2
JPH06518B2 JP58140188A JP14018883A JPH06518B2 JP H06518 B2 JPH06518 B2 JP H06518B2 JP 58140188 A JP58140188 A JP 58140188A JP 14018883 A JP14018883 A JP 14018883A JP H06518 B2 JPH06518 B2 JP H06518B2
Authority
JP
Japan
Prior art keywords
square pipe
wall thickness
frame
recess
bending
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 - Lifetime
Application number
JP58140188A
Other languages
Japanese (ja)
Other versions
JPS6033178A (en
Inventor
芳樹 篠原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Co Ltd
Original Assignee
Suzuki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Co Ltd filed Critical Suzuki Co Ltd
Priority to JP58140188A priority Critical patent/JPH06518B2/en
Publication of JPS6033178A publication Critical patent/JPS6033178A/en
Publication of JPH06518B2 publication Critical patent/JPH06518B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Motorcycle And Bicycle Frame (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、自動二輪車のフレームに関するものである。TECHNICAL FIELD The present invention relates to a frame of a motorcycle.

(従来の技術) 自動二輪車のフレーム1は、通常、第1図に示すように
パイプ材2を曲げ加工を施こし、これに各種補強材等を
溶接して組立てられている。従来にあってはフレーム用
パイプとして丸パイプが使用されていたが、溶接強度の
問題から、近時、第2図に示すような四角パイプが利用
されるようになってきた。
(Prior Art) A frame 1 of a motorcycle is usually assembled by bending a pipe material 2 and welding various reinforcing materials to the pipe material 2 as shown in FIG. In the past, a round pipe was used as a frame pipe, but due to the problem of welding strength, a square pipe as shown in FIG. 2 has recently come into use.

この四角パイプ3は、鉄パイプのこともあるが、軽量化
の要請から、アルミ合金、樹脂などの材質が用いられる
こともある。そしてその断面形状は四角形であり、その
平面部3aの肉厚寸法t2は、全体的に同一寸法になってい
る。この四角形の一辺における平面を利用して溶接強度
の向上を図ろうとするものであるが、この四角パイプ3
に曲げ加工を施こす場合、以下に挙げる問題があり、そ
の解決は重要な課題とされている。
The square pipe 3 may be an iron pipe, but may be made of a material such as an aluminum alloy or a resin in order to reduce the weight. The cross-sectional shape is a quadrangle, and the thickness t 2 of the flat surface portion 3a is the same overall. The flat surface on one side of this quadrangle is used to improve the welding strength.
There are the following problems when bending is applied to, and it is an important issue to solve them.

すなわち、 四角パイプは丸パイプに比して重量が大きい上に、
加工性が悪く、曲げ加工が容易でない。
That is, the square pipe is heavier than the round pipe, and
Workability is poor and bending is not easy.

曲げ加工部(第1図のA部内側の面で変形ひずみ4
が生じ(第3図参照)、フレーム1の強度低下の一因と
なる。
Bending part (deformation strain 4 on the inner surface of part A in FIG. 1)
Occurs (see FIG. 3), which contributes to the decrease in the strength of the frame 1.

変形やひずみによって製品の外観が悪くなることが
ある。
The appearance of the product may deteriorate due to deformation or distortion.

などである。And so on.

(発明が解決しようとする課題) そこでこの目的を達成するための手段として、四角パイ
プの角部を除いた各辺の厚さを角部の厚さより小さくす
ることを案出し、それに基づいたフレームを製作したと
ころ(特公昭64-6994号公報参照)、肉厚寸法を全体的
に同一にした従来のものに比し、曲げ加工時に変形やひ
ずみ、あるいはしわ等が発生しにくくなり、また重量軽
減を図ることができた。
(Problems to be solved by the invention) Then, as means for achieving this object, it was devised to make the thickness of each side of the square pipe excluding the corners smaller than the thickness of the corners, and a frame based on it (See Japanese Patent Publication No. Sho 64-6994), compared to the conventional one with the same wall thickness, it is less likely to be deformed, distorted, or wrinkled during bending, and has a high weight. We were able to reduce it.

しかしながらこのフレームは、四角パイプの曲げ加工時
に全くしわが生じないというものではなく、実用上の問
題はなくても、厳密に調べれば僅かではあってもしわが
発生することがある。
However, this frame is not one in which wrinkles do not occur at all when the square pipe is bent, and even if there is no problem in practical use, wrinkles may occur even if it is a slight amount if strictly examined.

本発明はこの点に鑑みてなされたものであり、上記した
角パイプの特徴はそのまま残し、さらに曲げ加工時に変
形やしわが生ずることがなく、またこれらが少々生じた
としても、目立たないようにすると共に、加工性の向上
とコスト低減とが図れる自動二輪車のフレームを提供し
ようとするものである。
The present invention has been made in view of this point, the characteristics of the square pipe described above are left as they are, deformation and wrinkles do not occur during bending, and even if these occur a little, it is not conspicuous At the same time, it is an object of the present invention to provide a frame for a motorcycle that can improve workability and reduce cost.

(課題を解決するための手段) 本発明は、上記課題を解決するための手段として、四角
パイプを使用し、該四角パイプの各平面部にそれぞれ凹
所を形成し、該凹所を形成した部分の肉厚寸法を、角部
の肉厚寸法より小さくすると共に、該四角パイプの曲げ
加工部分の内側となる一側面の凹所部分の肉厚寸法を、
外側となる他の三面の凹所部分の肉厚寸法より大きくし
た構成としたものである。
(Means for Solving the Problem) As a means for solving the above problems, the present invention uses a square pipe, forms a recess in each plane portion of the square pipe, and forms the recess. The wall thickness dimension of the portion is made smaller than the wall thickness dimension of the corner portion, and the wall thickness dimension of the concave portion on one side which is the inside of the bent portion of the square pipe is
The structure is made larger than the wall thickness dimension of the recessed portions on the other three outer surfaces.

(作用) このように、四角パイプの曲げ加工部分の内側となる一
側面の凹所部分の肉厚寸法を、外側となる他の三面の凹
所部分の肉厚寸法より大きくしたことにより、曲げ加工
時に応力が加わる内側曲げ部の強度が向上するので、変
形やしわがきわめて生じにくくなる。
(Operation) In this way, by making the wall thickness dimension of the recessed portion on one side on the inside of the bent portion of the square pipe larger than the wall thickness dimension of the recessed portion on the other three sides on the outer side, Since the strength of the inner bent portion to which stress is applied during processing is improved, deformation and wrinkling are extremely unlikely to occur.

(実施例) 以下、本発明の一実施例を第4図について説明する。本
発明に係る四角パイプ3は、角部3bの間に存在する平面
部を凹所3c,3dに形成し、この凹所3c,3dを形成した部
分の肉厚寸法t1,t2を、角部3bの肉厚寸法t3より小さく
すると共に、四角パイプ3の曲げ加工方向をB−B方向
としたとき、この四角パイプ3の曲げ加工部分の内側と
なる部分3eの肉厚寸法t1を、外側となる部分3fの肉厚寸
法t2より大きくしてある。
Embodiment An embodiment of the present invention will be described below with reference to FIG. In the square pipe 3 according to the present invention, the plane portions existing between the corner portions 3b are formed in the recesses 3c and 3d, and the wall thickness dimensions t 1 and t 2 of the portions where the recesses 3c and 3d are formed are When it is made smaller than the wall thickness dimension t 3 of the corner portion 3b and the bending direction of the square pipe 3 is set to the BB direction, the wall thickness dimension t 1 of the portion 3e which is inside the bending portion of the square pipe 3 is Is larger than the wall thickness dimension t 2 of the outer portion 3f.

このように構成することにより、縦横の外形寸法X,Y
を同一にした凹所のない従来のフレーム(第2図参照)
に比し、容易に重量軽減ができ、曲げ加工性も向上でき
ることになる。すなわち、肉厚寸法t2の部分が、従来の
四角パイプ3の肉厚寸法t4より薄いので、強度および剛
性はあまり低下させずに、その薄くなった分だけ重量軽
減が図れ、曲げ加工性も向上することになるのである。
With this configuration, the vertical and horizontal external dimensions X, Y
Conventional frame with the same recess (see Fig. 2)
Compared with the above, the weight can be easily reduced and the bending workability can be improved. That is, the portion of the wall thickness t 2 is because thinner than the thickness dimension t 4 of the conventional square pipe 3, without strength and rigidity is much lowered, Hakare its thinned amount corresponding weight reduction, bendability Will also improve.

曲げ加工時の変形、ひずみは主に圧縮方向で問題とな
る。したがって本発明のように平面部に凹所を形成し、
この部分の肉厚寸法を角部の肉厚寸法より小さく(薄
く)すると共に、曲げ加工部分の内側となる部分の肉厚
寸法t1を、外側となる部分の肉厚寸法t2より大きくする
ことにより、曲げ加工時に生ずる変形やひずみ、あるい
はしわ等は、肉厚寸法を全体的に同一にしてある従来の
ものに比してきわめて少なくなり、これらが少々生じた
としても、図面における縦方向の平面部の凹所3dの全幅
寸法が短くなるので目立つことがなくなることになる。
Deformation and strain during bending are mainly problems in the compression direction. Therefore, as in the present invention, a recess is formed in the flat portion,
The wall thickness of this part should be smaller (thinner) than the wall thickness of the corner, and the wall thickness t 1 of the inner part of the bent part should be larger than the wall thickness t 2 of the outer part. As a result, the deformation, strain, and wrinkles that occur during bending are much smaller than those of the conventional ones, which have the same overall wall thickness dimension. Since the overall width dimension of the recess 3d in the plane portion becomes short, it becomes inconspicuous.

(発明の効果) 本発明は以上説明したように、四角パイプを使用し、こ
の四角パイプの各平面部にそれぞれ凹所を形成し、この
凹所を形成した部分の肉厚寸法を、角部の肉厚寸法より
小さくすると共に、この四角パイプの曲げ加工部分の内
側となる一側面の凹所部分の肉厚寸法を、外側となる他
の三面の凹所部分の肉厚寸法より大きくした構成とした
ものであるから、曲げ加工時に、特に目に触れ易い部分
での変形やひずみ、あるいはしわ等が発生しない効果が
ある。また、加工工程において加工性が向上し、コスト
低減が図れる効果もある。
(Effect of the invention) As described above, the present invention uses a square pipe, forms a recess in each flat surface of the square pipe, and determines the wall thickness dimension of the part where the recess is formed as the corner portion. The thickness of the recessed part on one side inside the bent part of this square pipe is made larger than the thickness of the recessed part on the other three sides outside. Therefore, during bending, there is an effect that deformation, strain, wrinkles, etc. do not occur particularly in a portion that is easily visible. Further, there is an effect that workability is improved in the processing step and cost can be reduced.

【図面の簡単な説明】[Brief description of drawings]

第1図は自動二輪車のフレームの概略を示す斜視図、第
2図は第1図のフレームを角パイプにしたときの断面
図、第3図は第2図のものの曲げ加工時にひずみが生じ
た状態を示す断面図、第4図は本発明の一実施例の角パ
イプの断面図である。 1…フレーム 3…四角パイプ 3a…平面部 3b…角部 3c,3d…凹所 3e…内側となる部分 3f…外側となる部分
FIG. 1 is a perspective view showing an outline of a frame of a motorcycle, FIG. 2 is a sectional view when the frame of FIG. 1 is made into a square pipe, and FIG. 3 is distorted during bending of the thing of FIG. FIG. 4 is a sectional view showing a state, and FIG. 4 is a sectional view of a square pipe according to an embodiment of the present invention. 1 ... Frame 3 ... Square pipe 3a ... Plane part 3b ... Corner part 3c, 3d ... Recess 3e ... Inner part 3f ... Outer part

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】四角パイプを使用し、該四角パイプの各平
面部にそれぞれ凹所を形成し、該凹所を形成した部分の
肉厚寸法を、角部の肉厚寸法より小さくすると共に、該
四角パイプの曲げ加工部分の内側となる一側面の凹所部
分の肉厚寸法を、外側となる他の三面の凹所部分の肉厚
寸法より大きくしたことを特徴とする自動二輪車のフレ
ーム。
1. A square pipe is used, a recess is formed in each flat surface of the square pipe, and the thickness of the portion where the recess is formed is made smaller than the thickness of the corner. A frame for a motorcycle, wherein a thickness of a recessed portion on one side inside the bent portion of the square pipe is made larger than a thickness of a recessed portion on the other three sides outside.
JP58140188A 1983-07-30 1983-07-30 Motorcycle frame Expired - Lifetime JPH06518B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58140188A JPH06518B2 (en) 1983-07-30 1983-07-30 Motorcycle frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58140188A JPH06518B2 (en) 1983-07-30 1983-07-30 Motorcycle frame

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP20011793A Division JP2555857B2 (en) 1993-07-19 1993-07-19 Body components of motorcycles

Publications (2)

Publication Number Publication Date
JPS6033178A JPS6033178A (en) 1985-02-20
JPH06518B2 true JPH06518B2 (en) 1994-01-05

Family

ID=15262951

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58140188A Expired - Lifetime JPH06518B2 (en) 1983-07-30 1983-07-30 Motorcycle frame

Country Status (1)

Country Link
JP (1) JPH06518B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0674071B2 (en) * 1985-06-05 1994-09-21 ヤマハ発動機株式会社 Motorcycle frame

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS542017U (en) * 1977-06-06 1979-01-08
JPS5510329A (en) * 1978-07-10 1980-01-24 Dai Ichi High Frequency Co Ltd Production of large-diameter thick-walled bent pipe
JPS598590B2 (en) * 1979-12-28 1984-02-25 ヤマハ発動機株式会社 motorcycle frame
JPS646994A (en) * 1987-06-30 1989-01-11 Canon Kk Projector apparatus

Also Published As

Publication number Publication date
JPS6033178A (en) 1985-02-20

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