JPH0532276B2 - - Google Patents
Info
- Publication number
- JPH0532276B2 JPH0532276B2 JP60183210A JP18321085A JPH0532276B2 JP H0532276 B2 JPH0532276 B2 JP H0532276B2 JP 60183210 A JP60183210 A JP 60183210A JP 18321085 A JP18321085 A JP 18321085A JP H0532276 B2 JPH0532276 B2 JP H0532276B2
- Authority
- JP
- Japan
- Prior art keywords
- swing arm
- rear wheel
- thickness
- motorcycle
- disposed
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K25/00—Axle suspensions
- B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
- B62K25/28—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay
- B62K25/283—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay for cycles without a pedal crank, e.g. motorcycles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K25/00—Axle suspensions
- B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
- B62K25/28—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay
- B62K25/286—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay the shock absorber being connected to the chain-stay via a linkage mechanism
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Axle Suspensions And Sidecars For Cycles (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スイングアームに関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a swing arm for a motorcycle.
（従来の技術）
断面が閉塞断面形状を呈し、前部が車体フレー
ムに軸支され、後部で後輪を支持する自動二輪車
のスイングアームは、ピリオンステツプと後輪間
の寸法により車幅方向の外形寸法が定まり、また
ドライブチエーン等の寸法により上下方向の外形
寸法が定められる。(Prior Art) The swing arm of a motorcycle, which has a closed cross-sectional shape, is pivotally supported at the front part by the body frame, and supports the rear wheel at the rear part, has a swing arm in the vehicle width direction due to the dimension between the pillion step and the rear wheel. The external dimensions are determined, and the vertical external dimensions are determined by the dimensions of the drive chain, etc.
（発明が解決しようとする問題点）
一方、片持ち式に後輪を支持するスイングアー
ムでは、後輪のアクスルにかかる荷重によつてス
イングアームに曲げ及びねじりが作用する。(Problems to be Solved by the Invention) On the other hand, in a swing arm that supports the rear wheel in a cantilevered manner, bending and twisting are applied to the swing arm due to the load applied to the axle of the rear wheel.
従つて斯かる曲げ及びねじりに対して充分な剛
性をもたせるには、スイングアームの断面形状を
大きくすれば足りるが、単に大きくしたのではス
イングアームの外形寸法が変わる。 Therefore, in order to provide sufficient rigidity against such bending and torsion, it is sufficient to increase the cross-sectional shape of the swing arm, but simply increasing the cross-sectional shape changes the external dimensions of the swing arm.
また、外形寸法を変えずに剛性をもたせるため
肉厚を大きくすることが考えられるが、単に大き
くしたのではスイングアームの重量増となる。 Furthermore, it is conceivable to increase the wall thickness in order to provide rigidity without changing the external dimensions, but simply increasing the thickness would increase the weight of the swing arm.
本発明は前記事情に鑑み案内されたものであつ
て、本発明の目的とする処は、スイングアームの
外形寸法を変えずにスイングアームの剛性アツプ
を図り、同時に軽量化を達成できるスイングアー
ムを提供するにある。 The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a swing arm that can increase the rigidity of the swing arm without changing the external dimensions of the swing arm, and at the same time reduce the weight of the swing arm. It is on offer.
（問題点を解決するための手段）
本発明は前記目的を達成するため、スイングア
ームにおける後輪が配設される側の側面を構成す
る壁部の厚みを、後輪が配設される側とは反対側
の側面を構成する壁部の厚みよりも大きく形成し
たことを特徴とする。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention aims to reduce the thickness of the wall portion constituting the side surface of the swing arm on the side on which the rear wheel is disposed. It is characterized by being formed to have a thickness larger than that of the wall forming the side surface on the opposite side.
（作用）
曲げ及びねじりによつて高い応力が生ずる部分
の肉厚のみを大きく形成し、スイングアームの外
形寸法を変えずに充分な剛性をもたせ、同時に軽
量化を達成した。(Function) Only the parts where high stress is generated by bending and torsion are made thicker to provide sufficient rigidity without changing the external dimensions of the swing arm, and at the same time achieve weight reduction.
（実施例）
以下、本発明の好適一実施例を添付図面に従つ
て説明する。(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図は自動二輪車の側面図、第２図はスイン
グアーム、後輪部分の平面図、第３図はスイング
アームの斜視図を示す。 FIG. 1 is a side view of the motorcycle, FIG. 2 is a plan view of the swing arm and rear wheel portion, and FIG. 3 is a perspective view of the swing arm.
１は自動二輪車で、自動二輪車１の車体フレー
ム２は前端にヘツドパイプ３を備え、該ヘツドパ
イプ３、ハンドル４、フロントフオーク５を介し
て前輪６を操舵する。 Reference numeral 1 denotes a motorcycle, and a body frame 2 of the motorcycle 1 is provided with a head pipe 3 at the front end, and a front wheel 6 is steered via the head pipe 3, a handle 4, and a front fork 5.
前記車体フレーム２はヘツドパイプ３下部から
斜め下方に延出するダウンパイプ１１、ヘツドパ
イプ３上部から斜め後方に延出するメインパイプ
１２、メインパイプ１２後端に結着したスイング
アームブラケツト１３、メインパイプ１２中間部
から後方に延出するシートレール１４、シートレ
ール１４とスイングアームブラケツト１３を接続
するバツクステー１５等で構成し、前記車体フレ
ームメンバー１１，１２，１４，１５は左右一対
設ける。 The vehicle body frame 2 includes a down pipe 11 extending diagonally downward from the bottom of the head pipe 3, a main pipe 12 extending diagonally rearward from the top of the head pipe 3, a swing arm bracket 13 tied to the rear end of the main pipe 12, and a main pipe 12. It is composed of a seat rail 14 extending rearward from the intermediate portion, a back stay 15 connecting the seat rail 14 and the swing arm bracket 13, etc., and the vehicle body frame members 11, 12, 14, 15 are provided in pairs on the left and right.
エンジン２１は前記ダウンパイプ１１、メイン
パイプ１２、スイングアームブラケツト１３を介
して車体フレーム２に搭載し、メインパイプ１２
に燃料タンク２３を、シートレール１４上にシー
ト２４を夫々配設する。 The engine 21 is mounted on the vehicle body frame 2 via the down pipe 11, the main pipe 12, and the swing arm bracket 13.
A fuel tank 23 is disposed on the seat rail 14, and a seat 24 is disposed on the seat rail 14.
後輪３１のアクスル３２を後輪で支持するスイ
ングアーム３３は、前端をピボツト軸３５を介し
てスイングアームブラケツト１３に軸支し、スイ
ングアーム３３とスイングアームブラケツト１３
間には緩衝器３６、リンク機構３７を架設し、ド
ライブチエーン３８、スプロケツト３９等を介し
てエンジン動力により後輪３１を駆動する。 The swing arm 33 that supports the axle 32 of the rear wheel 31 with the rear wheel has its front end pivotally supported on the swing arm bracket 13 via the pivot shaft 35, and the swing arm 33 and the swing arm bracket 13 are connected to each other.
A shock absorber 36 and a link mechanism 37 are installed between them, and the rear wheels 31 are driven by engine power via a drive chain 38, sprocket 39, etc.
前記スイングアーム３３は車体フレーム２側に
軸支されるべく前部４１と、リヤアクスル３２を
支持する後部４２と、前部４１と後部４２を接続
する中間部４３で構成し、第２図に示すように中
間部４３はドライブチエーン３８の張り側と弛み
側の間に位置させ、図中４７はピリオンステツ
プ、４８はステツプホルダーを示す。 The swing arm 33 is composed of a front part 41 that is pivotally supported on the vehicle body frame 2 side, a rear part 42 that supports the rear axle 32, and an intermediate part 43 that connects the front part 41 and the rear part 42, as shown in FIG. As shown, the intermediate portion 43 is located between the tight side and the slack side of the drive chain 38, and in the figure, 47 indicates a pillion step and 48 indicates a step holder.
前記スイングアーム３３の前部４１は、車幅方
向に延出する基部５１と、基部５１から二又状に
前方へ延出する一対の腕部５２，５２を備え、腕
部５２，５２の前端にはピボツト軸３５に結合す
べく筒状の部材５４を設ける。 The front portion 41 of the swing arm 33 includes a base portion 51 extending in the vehicle width direction, and a pair of arm portions 52, 52 extending forward from the base portion 51 in a bifurcated manner. A cylindrical member 54 is provided to be coupled to the pivot shaft 35.
前記中間部４３は基部５１の左側箇所から後方
に延出する。中間部４３は平面視した場合、後輪
３１のタイヤ５６の輪郭に対応させて車幅外方に
凸状に形成し、前記基部５１と、中間部における
車幅外方に突出する部分５７と、該部分５７から
車幅内方に斜めに延出する部分５８により凹部５
９が形成されている。 The intermediate portion 43 extends rearward from the left side of the base portion 51 . When viewed from above, the intermediate portion 43 is formed in a convex shape outward in the vehicle width corresponding to the outline of the tire 56 of the rear wheel 31, and includes the base portion 51 and a portion 57 in the intermediate portion that protrudes outward in the vehicle width. , the recessed portion 5 is formed by a portion 58 extending diagonally inward from the portion 57 in the vehicle width direction.
9 is formed.
スイングアーム３３の後部４２は前記中間部４
３における車幅内方に斜めに延出する部分５８か
ら後方に延出させて形成し、後部４２にはアクス
ル３２を支持すべく軸受等を組込む。 The rear part 42 of the swing arm 33 is connected to the intermediate part 4.
The axle 32 is formed by extending rearward from a portion 58 that extends diagonally inward in the vehicle width at the rear portion 42, and a bearing or the like is incorporated in the rear portion 42 to support the axle 32.
前記スイングアーム３３の各部の断面は夫々上
下に縦長の閉塞断面形状で形成し、第４図に第２
図の−線断面図を示すように、中間部４３及
び後部４２は上下に縦長の略六角形の断面形状で
形成する。 The cross section of each part of the swing arm 33 is formed in a vertically elongated closed cross section shape, as shown in FIG.
As shown in the cross-sectional view taken along the - line in the figure, the intermediate portion 43 and the rear portion 42 are formed to have a vertically elongated substantially hexagonal cross-sectional shape.
そして、曲げとねじりによつてスイングアーム
３３に高い応力が生ずる部分、例えば第２図に斜
線で示すように後輪３１が配設される側の腕部５
２における外側面を構成する壁部５２ａと、基部
５１における背面を構成する壁部５１ａと、中間
部４３及び後部４２における後輪３１が配設され
る側の側面を構成する壁部４３ａ，４２ａの厚み
t1を夫々対向する壁部５２ｂ，５１ｂ，４３ｂ，
４２ｂの厚みt2よりも大きく形成する。尚、実施
例では前部４１を二又状に分岐して剛性を確保し
ているので壁部５２ａの厚みは大きく形成しなく
てもよい。そして実施例では前記壁部５２ａ，５
１ａ，４３ａ，４２ａの厚みを７mmとし、他の壁
部の厚みを４mmとした。 A portion of the swing arm 33 that is subject to high stress due to bending and twisting, for example, the arm portion 5 on the side where the rear wheel 31 is disposed, as shown by diagonal lines in FIG.
2, a wall 51a forming the back surface of the base 51, and walls 43a, 42a forming the side surface of the intermediate portion 43 and rear portion 42 on which the rear wheel 31 is disposed. thickness of
Wall portions 52b, 51b, 43b facing each other at t1 ,
The thickness is formed to be larger than the thickness t 2 of 42b. In the embodiment, since the front portion 41 is bifurcated to ensure rigidity, the thickness of the wall portion 52a does not need to be large. In the embodiment, the wall portions 52a, 5
The thickness of 1a, 43a, and 42a was 7 mm, and the thickness of the other wall portions was 4 mm.
本実施例は前記のように構成し、曲げ及びねじ
りの作用により高い応力が生ずる部分のみの肉厚
を大きくしてスイングアーム３３を形成したの
で、スイングアーム３３の外形寸法を変えること
なく剛性アツプを図れ、同時に剛性アツプを図り
つつスイングアーム３３の軽量化を達成すること
ができる。 In this embodiment, the swing arm 33 is constructed as described above, and the swing arm 33 is formed by increasing the wall thickness only in the portion where high stress is generated due to bending and torsion, so the rigidity can be increased without changing the external dimensions of the swing arm 33. At the same time, the weight of the swing arm 33 can be reduced while increasing the rigidity.
第５図は本発明の第２実施例に係るスイングア
ーム３３の中間部４３の断面図を示す。 FIG. 5 shows a sectional view of an intermediate portion 43 of a swing arm 33 according to a second embodiment of the present invention.
第２実施例では後輪３１が配設される側の側面
を構成する壁部４３ａの厚みt1を対向する壁部４
３ｂの厚みt2よりも大きく形成すると共に、上下
面６１，６２から夫々所定厚みのリブ６３を膨出
形成し、剛性アツプを図つた。 In the second embodiment, the thickness t 1 of the wall portion 43a constituting the side surface on which the rear wheel 31 is disposed is
3b is formed to be larger than the thickness t2 , and ribs 63 of a predetermined thickness are formed to protrude from the upper and lower surfaces 61 and 62, respectively, to increase rigidity.
尚、実施例においてはスイングアーム３３の前
部が二又状の腕部５２，５２に分岐されたものに
ついて説明したが、斯かるスイングアーム３３の
形状は任意で、例えば二又状に分枝せず単に前後
に延出する形状でもよく、要するに本発明は後輪
を片持ち式に支持する形式のすべてのスイングア
ームに適用される。 In the embodiment, the front part of the swing arm 33 is branched into forked arm parts 52, 52, but the shape of the swing arm 33 is arbitrary. For example, it may be branched into a forked shape. In other words, the present invention is applicable to all types of swing arms that support the rear wheel in a cantilevered manner.
（発明の効果）
以上の説明で明らかなように本発明によれば、
外形寸法を変えずにスイングアームに充分な剛性
をもたせ、同時に軽量化を達成することができ
る。(Effect of the invention) As is clear from the above explanation, according to the present invention,
It is possible to provide the swing arm with sufficient rigidity without changing the external dimensions, and at the same time achieve weight reduction.
第１図は自動二輪車の側面図、第２図はスイン
グアーム、後輪部分の平面図、第３図はスイング
アームの斜視図、第４図は第２図の−線断面
図、第５図は第２実施例の断面図である。
尚図面中１は自動二輪車、２は車体フレーム、
６は前輪、３１は後輪、３３はスイングアームで
ある。
Fig. 1 is a side view of the motorcycle, Fig. 2 is a plan view of the swing arm and rear wheel portion, Fig. 3 is a perspective view of the swing arm, Fig. 4 is a sectional view taken along the - line in Fig. 2, and Fig. 5 is a sectional view of the second embodiment. In addition, 1 in the drawing is a motorcycle, 2 is a body frame,
6 is a front wheel, 31 is a rear wheel, and 33 is a swing arm.
Claims (1)
を片持ち式に支持し、閉塞断面形状を呈する自動
二輪車のスイングアームにおいて、前記スイング
アームにおける後輪が配設される側の側面を構成
する壁部の厚みを、後輪が配設される側とは反対
側の側面を構成する壁部の厚みよりも大きく形成
したことを特徴とする自動二輪車のスイングアー
ム。1. In a swing arm of a motorcycle whose front part is pivotally supported by a body frame, whose rear part supports a rear wheel in a cantilevered manner, and which has a closed cross-sectional shape, the side surface of the swing arm on which the rear wheel is disposed is A swing arm for a motorcycle, characterized in that the thickness of a wall portion forming the swing arm is greater than the thickness of a wall portion forming a side surface opposite to the side on which a rear wheel is disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60183210A JPS6243386A (en) | 1985-08-21 | 1985-08-21 | Swing arm for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60183210A JPS6243386A (en) | 1985-08-21 | 1985-08-21 | Swing arm for motorcycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6243386A JPS6243386A (en) | 1987-02-25 |
| JPH0532276B2 true JPH0532276B2 (en) | 1993-05-14 |
Family
ID=16131704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60183210A Granted JPS6243386A (en) | 1985-08-21 | 1985-08-21 | Swing arm for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6243386A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06315Y2 (en) * | 1987-02-06 | 1994-01-05 | 本田技研工業株式会社 | Cantilever type swing arm for motorcycles |
| JPH01145692U (en) * | 1988-03-16 | 1989-10-06 | ||
| JP5618949B2 (en) * | 2011-08-29 | 2014-11-05 | 本田技研工業株式会社 | Swing arm for small vehicle |
-
1985
- 1985-08-21 JP JP60183210A patent/JPS6243386A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6243386A (en) | 1987-02-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |