JPH03164390A - Swing arm for motorcycle - Google Patents
Swing arm for motorcycleInfo
- Publication number
- JPH03164390A JPH03164390A JP30086689A JP30086689A JPH03164390A JP H03164390 A JPH03164390 A JP H03164390A JP 30086689 A JP30086689 A JP 30086689A JP 30086689 A JP30086689 A JP 30086689A JP H03164390 A JPH03164390 A JP H03164390A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- forks
- bridge
- welding
- swing arm
- 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
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000725 suspension Substances 0.000 claims abstract description 12
- 241000272184 Falconiformes Species 0.000 claims description 7
- 238000003466 welding Methods 0.000 abstract description 18
- 238000003825 pressing Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
Landscapes
- Axle Suspensions And Sidecars For Cycles (AREA)
Abstract
Description
【発明の詳細な説明】 (産業上の利用分野) この発明は自動二輪車のスイングアームに関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a swing arm for a motorcycle.
(従来の技術)
自動二輪車は、スイングアームの前端をフレームに揺動
自在に軸着し、スイングアームの前寄り部分をフレーム
上部の間にサスペンションを連結し、スイングアームの
後端に後輪を回転自在に支承した車軸を締着するように
なっている。一般にスイングアームは、所望強度のバイ
ブ材を選択し、これを溶接して製作されている。又、左
右のホーク部分を板材を二つ割りにしてプレス成形し、
これを最中状に合せて溶着して製作しているものがある
。更に前部の大きい荷重を受ける部分を鋳造で一体成形
し、この左右後端にパイプ材のホークを溶着して製作す
るようにしたものもある。例えば、実開昭81−111
892号公報参照。(Prior art) In a motorcycle, the front end of a swing arm is pivotally attached to a frame, a suspension is connected between the front part of the swing arm and the upper part of the frame, and the rear wheel is attached to the rear end of the swing arm. It is designed to fasten a rotatably supported axle. Generally, a swing arm is manufactured by selecting a vibrator material with a desired strength and welding the materials together. In addition, the left and right hawk parts are made by cutting the plate material into two and press forming them.
Some products are manufactured by welding this to match the middle shape. Furthermore, there is also a model in which the front part, which receives a large load, is integrally formed by casting, and pipe material hawks are welded to the left and right rear ends. For example, Utsukai Showa 81-111
See Publication No. 892.
(発明が解決しようとする課題)
スイングアー′ムは、前寄りのサスペンションを連結す
る部分が最も大きい荷重を受け、そこから前又は後にな
るに従って荷重が小さくなる。このため、スイングアー
ム前寄りのサスペンション連結部分を最も強度を有する
ようにする必要がある。(Problems to be Solved by the Invention) In the swing arm, the portion that connects the front suspension receives the largest load, and the load decreases from there toward the front or rear. For this reason, it is necessary to make the suspension connecting portion near the front of the swing arm the strongest.
バイブ材を溶着して作るものは、前後の受ける荷重が小
さい部分が、過剰強度になって重くなる不都合がある。A vibrator made by welding vibrator materials has the disadvantage that the front and rear parts, which receive less load, have excessive strength and become heavy.
左右のホークを二つ割りにして板材でプレス成形し最中
状に合せて溶着するものは、断面が必要強度に応じて変
えることができて軽量化できる。しかし、溶着長さが長
くなり、溶着コストが高く、溶着跡が見苦しい不都合が
ある。更にスイングアームの前部を鋳造で一体或形する
ものは、各断面を所望強度に応じて変化させて成形でき
るが、鋳造品はパイプ材に比べて材質が粗であるので、
その分だけ肉厚さを厚くして強度を保つ必要があり、重
量軽減ができない不便がある。By splitting the left and right forks into two, press-forming them from plate material, and then welding them together, the cross section can be changed depending on the required strength, and the weight can be reduced. However, the welding length is long, the welding cost is high, and the welding marks are unsightly. Furthermore, if the front part of the swing arm is integrally formed by casting, each cross section can be changed depending on the desired strength, but since the material of a cast product is rougher than pipe material,
It is necessary to increase the wall thickness accordingly to maintain strength, and there is an inconvenience that the weight cannot be reduced.
この発明は、かかる点に鑑み、パイプ材を用いて必要強
度に断面を変化させて軽量にでき、溶着コストも安く体
裁よく仕上げることができる自動二輪車のスイングアー
ムを得ることを目的とする。In view of the above, an object of the present invention is to obtain a swing arm for a motorcycle that can be made lightweight by changing the cross section to the required strength using a pipe material, and can be finished at a low welding cost and with good appearance.
(課題を解決するための手段)
上記目的を達成するために、この発明の自動二輪車のス
イングアームは、所定長さに切断したパイプ材を外型内
にセットして両端側から加圧しながら内側に油圧を加え
てバルジ加工して前寄り部分が太く前後が細くなった断
面長四角形の左右のホークを形成し、該左右のホークの
前端を軸筒に突当てて溶着すると共に左右のホークの前
寄り部分をサスペンションボスを設けたブリッジで溶着
連結するようにしたことにある。(Means for Solving the Problems) In order to achieve the above object, the swing arm of a motorcycle of the present invention is produced by setting a pipe material cut to a predetermined length in an outer mold, and applying pressure from both ends to the inside of the swing arm. The left and right hawks with a long rectangular cross section are thickened at the front and thinner at the front and back by applying hydraulic pressure to form a bulge. The front part is welded and connected with a bridge equipped with a suspension boss.
(作 用)
左右のホークは、パイプ材を両面側から加圧しながら内
側に油圧を加えてバルジ加工することによって、肉厚さ
の均一化を図りながら、サスペンションボスを有するブ
リッジを連結する最も大きい荷重を受ける前寄り部分を
太い断面にでき、前後を受ける荷重に合せて細く、軽量
にできる。そして、溶着箇所は、左右のホークと軸筒と
、左右のホークとブリッジの間だけで、溶着長さが短く
溶着コストが安価で、溶着跡も少く目立たないようにで
きる。(Function) The left and right hawks are made by pressurizing the pipe material from both sides and applying hydraulic pressure to the inside to form a bulge, thereby making the wall thickness uniform and making it the largest bridge that connects the bridge with the suspension boss. The front part that receives the load can be made thicker, and the front and rear parts can be thinner and lighter to accommodate the load. The welding points are only between the left and right forks and the shaft cylinder, and between the left and right forks and the bridge, and the welding length is short, the welding cost is low, and the welding traces are small and inconspicuous.
(実施例) 以下、本発明の実施例を図面によって説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
左右のホーク1は、第3図に示すように、軽合金などの
押出しパイプ材2を(イ)に示すように所望長さに切断
し、これを(ロ)に示すように二つの割りの外型にセッ
トする。そして、押圧型4で両端側から加圧しながら内
側に油圧を加えてバルジ加工し、肉厚さの均一化を図り
ながら(ハ)に示すように、前寄り部分5が、上下長さ
及び左右長さが最も大きく、そこから前後が細くなった
断面長四角形のホーク1に成形し、(二)に示すように
し、前後を切断してホーク1とする。こうして成形した
左右一対のホーク1の前端を軸筒6に突当てて溶着し、
左右のホーク1の前寄り部分5の太い箇所の内側6=、
サスペンションボス7を設けた管状のブリッジ8を溶着
連結する。左右のホーク1の後端には、車軸孔9を穿設
する。軸筒6は、フレームに軸着し、サスペンションボ
ス7にはサスペンションを連結し、揺動クッシ5ンでき
るようにし、車軸孔9に後輪の車軸を締着する。As shown in Fig. 3, the left and right hawks 1 are made by cutting an extruded pipe material 2 made of light alloy or the like to a desired length as shown in (a), and cutting it into two pieces as shown in (b). Set it in the outer mold. Then, while applying pressure from both ends with the pressing die 4, hydraulic pressure is applied to the inside to form a bulge, and as shown in (c), the front part 5 is The hawk 1 is formed into a long rectangular cross section with the longest length and narrower at the front and back, as shown in (2), and cut at the front and back to form the hawk 1. The front ends of the pair of left and right hawks 1 thus formed are brought into contact with the shaft cylinder 6 and welded,
Inside the thick part 6 of the front part 5 of the left and right hawks 1 =,
A tubular bridge 8 provided with a suspension boss 7 is welded and connected. An axle hole 9 is bored in the rear ends of the left and right forks 1. The shaft cylinder 6 is pivotally attached to the frame, a suspension is connected to the suspension boss 7 so that a swinging bush 5 can be mounted, and the axle of the rear wheel is fastened to the axle hole 9.
(発明の効果)
以上説明したように、この発明は、上述のように構成し
たので、左右のホークをパイプ材を用いながらバルジ加
工で、肉厚さの均一化を図りながら、断面を所用強度に
変化させることができて、軽量化が図れる。そして、溶
着個所が少くて、溶着コストが低減できてコストダウン
が図れ、溶着跡も少くて美しく仕上げることができる。(Effects of the Invention) As explained above, since the present invention is configured as described above, the left and right forks are bulged using pipe material, and the cross section is made to have the required strength while making the wall thickness uniform. It can be changed to make it lighter. In addition, there are fewer welding locations, which reduces welding costs, resulting in lower costs, and fewer welding marks, resulting in a beautiful finish.
図は本発明の一実施例を示し、
第1図は平面図、
第2図は側面図、
第3図は(イ)〜(二)の順にホークの成形を示す成形
説明図、
である。
1・・・ホーク、2・・・パイプ材、3・・・外型、5
・・・前寄り部分、6・・・軸筒、7・・−サスペンシ
ョンボス、8・・・ブリッジ。The drawings show one embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is a side view, and FIG. 3 is a forming explanatory view showing the forming of the hawk in the order of (a) to (ii). 1...Hawk, 2...Pipe material, 3...Outer mold, 5
...Front part, 6...Axle tube, 7...Suspension boss, 8...Bridge.
Claims (1)
側から加圧しながら内側に油圧を加えてバルジ加工して
前寄り部分が太く前後が細くなった断面長四角形の左右
のホークを形成し、該左右のホークの前端を軸筒に突当
てて溶着すると共に左右のホークの前寄り部分をサスペ
ンションボスを設けたブリッジで溶着連結するようにし
たことを特徴とする自動二輪車のスイングアーム。Pipe material cut to a predetermined length is set in an outer mold, and while pressure is applied from both ends, hydraulic pressure is applied to the inside to create a bulge, creating left and right hawks with a rectangular cross section that is thicker at the front and narrower at the front and back. A swing arm for a motorcycle, characterized in that the front ends of the left and right forks abut against and weld to the shaft cylinder, and the front parts of the left and right forks are welded and connected by a bridge provided with a suspension boss. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30086689A JPH03164390A (en) | 1989-11-21 | 1989-11-21 | Swing arm for motorcycle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30086689A JPH03164390A (en) | 1989-11-21 | 1989-11-21 | Swing arm for motorcycle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03164390A true JPH03164390A (en) | 1991-07-16 |
Family
ID=17890053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30086689A Pending JPH03164390A (en) | 1989-11-21 | 1989-11-21 | Swing arm for motorcycle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03164390A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6182994B1 (en) * | 1995-09-25 | 2001-02-06 | Honda Giken Kogyo Kabushiki Kaisha | Rear swing arm of motor-bike with tapered rectangular pipe member and method of manufacturing tapered rectangular pipe for vehicle body |
US6789638B2 (en) * | 2001-06-20 | 2004-09-14 | Yamaha Hatsudoki Kabushiki Kaisha | Motorcycle rear suspension swingarm assembly |
JP2016067616A (en) * | 2014-09-30 | 2016-05-09 | 株式会社松永製作所 | Frame structure of wheelchair and the wheelchair |
-
1989
- 1989-11-21 JP JP30086689A patent/JPH03164390A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6182994B1 (en) * | 1995-09-25 | 2001-02-06 | Honda Giken Kogyo Kabushiki Kaisha | Rear swing arm of motor-bike with tapered rectangular pipe member and method of manufacturing tapered rectangular pipe for vehicle body |
US6789638B2 (en) * | 2001-06-20 | 2004-09-14 | Yamaha Hatsudoki Kabushiki Kaisha | Motorcycle rear suspension swingarm assembly |
JP2016067616A (en) * | 2014-09-30 | 2016-05-09 | 株式会社松永製作所 | Frame structure of wheelchair and the wheelchair |
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