JPH0448677B2 - - Google Patents
Info
- Publication number
- JPH0448677B2 JPH0448677B2 JP20914783A JP20914783A JPH0448677B2 JP H0448677 B2 JPH0448677 B2 JP H0448677B2 JP 20914783 A JP20914783 A JP 20914783A JP 20914783 A JP20914783 A JP 20914783A JP H0448677 B2 JPH0448677 B2 JP H0448677B2
- Authority
- JP
- Japan
- Prior art keywords
- intermediate shaft
- rear arm
- shaft
- sprocket
- chain
- 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
Links
Landscapes
- Axle Suspensions And Sidecars For Cycles (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、後アーム後端に広幅タイヤの後輪を
１個設けた自動二輪車や自動三輪車等（以下自動
二輪車等という）のチエン駆動装置に関するもの
である。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a chain drive device for a motorcycle, three-wheeled vehicle, etc. (hereinafter referred to as a motorcycle, etc.), which has one rear wheel with a wide tire at the rear end of the rear arm. It is something.
後輪に空気圧を0.1〜0.3Kg／cm2．ｇ程度の低圧
にした広幅タイヤ（所謂バルーンタイヤ）を装着
した自動二輪車がある。この自動二輪車は後輪が
広幅であるため、エンジンの動力を１本のチエン
だけでは後輪へ伝達することができず、そのため
エンジン出力軸と後輪との間に中間軸を介在さ
せ、この中間軸を介して２本のチエンにより伝達
するようにしている。ところが、従来のチエン駆
動装置では中間軸が後アームのピボツト軸上に設
けられているため、この中間軸上のスプロケツト
が運転者の足載位置を制約するという問題があつ
た。
Air pressure in the rear wheels is 0.1-0.3Kg/ cm2 . There are motorcycles that are equipped with wide tires (so-called balloon tires) that have a pressure as low as 1.5 g. Because this motorcycle has a wide rear wheel, the power from the engine cannot be transmitted to the rear wheel with just one chain, so an intermediate shaft is interposed between the engine output shaft and the rear wheel. Transmission is done through two chains via an intermediate shaft. However, in the conventional chain drive device, since the intermediate shaft is provided on the pivot axis of the rear arm, there is a problem in that the sprocket on the intermediate shaft restricts the position where the driver's feet are placed.
この問題を解消するため、上記中間軸を後アー
ム上に設けるようにした発明が先願の特願昭58−
131853号により提案さている。しかし、このよう
に中間軸を後アームに設ける場合の問題は、中間
軸上の一次チエンのスプロケツトと二次チエンの
スプロケツトとの配置により車幅が広くなつた
り、車体長が大きくなつたりすることである。す
なわち、両スプロケツトを後アーム外側部に配置
すると車幅が拡大し、また後アーム内側部に配置
すると後輪との干渉を避けるため車体長を大きく
しなければならなくなる。また、中間軸を片持状
に長つ突出させて両スプロケツトを支持するた
め、曲げモーメントが大きくなつて軸の太径化も
必要になる。 In order to solve this problem, an invention in which the above-mentioned intermediate shaft was provided on the rear arm was proposed in the earlier patent application filed in 1983.
Proposed by No. 131853. However, the problem with installing the intermediate shaft on the rear arm in this way is that the arrangement of the primary chain sprocket and secondary chain sprocket on the intermediate shaft increases the vehicle width and length. It is. That is, if both sprockets are placed on the outside of the rear arm, the vehicle width will be increased, and if they are placed on the inside of the rear arm, the length of the vehicle body must be increased to avoid interference with the rear wheel. Furthermore, since the intermediate shaft is extended in a cantilevered manner to support both sprockets, the bending moment becomes large and the diameter of the shaft must be increased.
本発明の目的は車幅や車体長を大きくすること
なく、かつ中間軸々径を細くすることができる自
動二輪車等のチエン駆動装置を提供せんとするこ
とにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a chain drive device for a motorcycle or the like that can reduce the diameters of intermediate shafts without increasing the vehicle width or body length.
上記目的を達成する本発明のチエン駆動装置
は、後アームの後端に広幅タイヤからなる後輪を
１個設け、この後輪を後アーム上の中間軸を介し
該中間軸とエンジン出力軸の間の一次チエンと、
中間軸と後輪の間の二次チエンとにより駆動すべ
くした自動二輪車等において、前記中間軸の中間
部を後アーム上に支持し、後アームの左右両側に
突出した前記中間軸々端の一方に前記一次チエン
のスプロケツトを固定し、他方に前記二次チエン
のスプロケツトをそれぞれ固定したことを特徴と
するものである。 The chain drive device of the present invention that achieves the above object has one rear wheel made of a wide tire at the rear end of the rear arm, and the rear wheel is connected to the intermediate shaft and the engine output shaft via an intermediate shaft on the rear arm. A primary chain between the
In a motorcycle or the like that is intended to be driven by a secondary chain between an intermediate shaft and a rear wheel, an intermediate portion of the intermediate shaft is supported on a rear arm, and each end of the intermediate shaft protrudes on both left and right sides of the rear arm. The sprocket of the primary chain is fixed to one side, and the sprocket of the secondary chain is fixed to the other side.
以下、本発明を図に示す実施例により説明す
る。
Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.
図において１は主フレーム、２はその下方に搭
載されたエンジン、３は前輪、４は後輪である。
主フレーム１から後方へ延長したシートレール５
上にはシート６が設けてある。 In the figure, 1 is the main frame, 2 is the engine mounted below it, 3 is the front wheel, and 4 is the rear wheel.
Seat rail 5 extending rearward from main frame 1
A sheet 6 is provided on top.
後輪４は内圧が0.1〜0.3Kg／cm2．ｇ程度の低圧
広幅タイヤであり、その幅はエンジン２又はシー
トレール５と同程度又はそれより若干広めになつ
ている。この広幅タイヤの後輪４は左右の後アー
ム７，７の後端に支持され、後アーム７は前端側
を主フレーム１後部のピボツト軸８に枢支されて
いる。また中間部は緩衝器９を介してフレームに
対し弾性支持されている。片側の後フレーム７の
中間位置には中間軸１０が支持され、その両軸端
が後アーム７の左右両側に突出するようになつて
いる。その両軸端にはそれぞれスプロケツト１
２，１３が固定されている。後アーム７の内側に
設けたスプロケツト１２には、エンジン出力軸
（クランク軸）１５に固定したスプロケツト１１
との間に一次チエン１６が巻回され、また後アー
ム７の外側に設けたスプロケツト１３には、後輪
に固定したスプロケツト１４との間に二次チエン
１７が巻回されている。エンジン２の動力はこの
一次チエン１６と二次チエン１７を介して後輪４
へ伝達される。後アーム７のピボツト軸８前方に
は、車体の両側にそれぞれ足載台２７，２７が設
けてある。 The internal pressure of the rear wheel 4 is 0.1 to 0.3Kg/cm 2 . It is a low-pressure wide tire with a pressure of about 1.5 g, and its width is about the same as or slightly wider than that of the engine 2 or the seat rail 5. The wide tire rear wheel 4 is supported by the rear ends of left and right rear arms 7, 7, and the front end of the rear arm 7 is pivotally supported by a pivot shaft 8 at the rear of the main frame 1. Further, the intermediate portion is elastically supported by the frame via a buffer 9. An intermediate shaft 10 is supported at an intermediate position of the rear frame 7 on one side, and both ends of the shaft protrude to both left and right sides of the rear arm 7. There is a sprocket 1 at each end of the shaft.
2 and 13 are fixed. A sprocket 12 provided inside the rear arm 7 has a sprocket 11 fixed to an engine output shaft (crankshaft) 15.
A primary chain 16 is wound around the sprocket 13 provided on the outside of the rear arm 7, and a secondary chain 17 is wound around the sprocket 14 fixed to the rear wheel. The power of the engine 2 is transmitted to the rear wheels 4 through this primary chain 16 and secondary chain 17.
transmitted to. In front of the pivot shaft 8 of the rear arm 7, footrests 27 are provided on both sides of the vehicle body, respectively.
中間軸１０を支持している側の後アーム７は前
方の板金部材７ａと後方の引抜部材７ｂとの両部
材に分離され、この両部材７ａ，７ｂの間に中間
軸１０の軸支持部材１８が介在し溶接されてい
る。また板金部材７ａは他方の後アーム７に連結
され、さらに斜めの補強材２６を介して引抜部材
７ｂにも連結されている。 The rear arm 7 on the side supporting the intermediate shaft 10 is separated into two members: a sheet metal member 7a at the front and a pull-out member 7b at the rear, and a shaft support member 18 for the intermediate shaft 10 is disposed between the two members 7a and 7b. is interposed and welded. Further, the sheet metal member 7a is connected to the other rear arm 7, and further connected to the extraction member 7b via a diagonal reinforcing member 26.
第３図に示すように、中間軸１０は軸支持部材
１８に軸受１９を介して回動自在に支持されてい
る。中間軸１０の両端にはそれぞれスプライン２
０，２１が刻設され、その一方のスプライン２０
にはスプロケツト１２が噛合し、他方のスプライ
ン２１にはスプロケツト１３が噛合している。ス
プロケツト１３は溝２２に嵌合させた内歯付プレ
ート２３により抑えられると共に、ボルト２４に
よつて内歯付プレート２３に一体に固定されてい
る。この状態で他方のスプロケツト１２側の軸端
にナツト２５が螺合され且つ締付られることによ
り、両スプロケツト１２，１３が中間軸１０上に
固定されるようになつている。このような固定状
態において、軸支持部材１８の両縁部は平面視状
態でそれぞれチエン１６，１７と一部オーバラツ
プした状態になる。 As shown in FIG. 3, the intermediate shaft 10 is rotatably supported by a shaft support member 18 via a bearing 19. As shown in FIG. Splines 2 are provided at both ends of the intermediate shaft 10, respectively.
0,21 are engraved, and one spline 20
A sprocket 12 meshes with the spline 21, and a sprocket 13 meshes with the other spline 21. The sprocket 13 is held down by a plate 23 with internal teeth fitted into the groove 22, and is integrally fixed to the plate 23 with internal teeth by bolts 24. In this state, the nut 25 is screwed onto the shaft end on the other sprocket 12 side and tightened, thereby fixing both sprockets 12 and 13 on the intermediate shaft 10. In such a fixed state, both edges of the shaft support member 18 partially overlap the chains 16 and 17, respectively, when viewed from above.
上述したように、中間軸１０はその中間部が後
アーム７を横切るように支持され、両軸端が後ア
ーム７の左右両側に突出し、その両側にスプロケ
ツト１２，１３が振り分け固定されている。その
ため両スプロケツト１２，１３を後アーム７のい
ずれか一方だけに配置する場合に比べて車体幅は
狭くなり、また後輪４との干渉をなくして車体長
を大きくすることがない。また中間軸１０に負荷
される曲げモーメントは、後アーム７での支持点
からの突出長が短くなつた分だけ小さくなり、そ
れによつて軸径を細くすることができる。 As described above, the intermediate shaft 10 is supported so that its intermediate portion crosses the rear arm 7, and both shaft ends protrude to both left and right sides of the rear arm 7, and sprockets 12 and 13 are fixedly distributed on both sides. Therefore, the vehicle body width becomes narrower than in the case where both sprockets 12, 13 are arranged only on either one of the rear arms 7, and interference with the rear wheel 4 is eliminated, so that the vehicle body length does not increase. Further, the bending moment applied to the intermediate shaft 10 is reduced by the reduction in the protruding length of the rear arm 7 from the support point, thereby making it possible to reduce the shaft diameter.
なお、上述の実施例は自動二輪車の場合である
が、本発明は前輪３を二輪にした自動三輪車につ
いても適用可能である。 Although the above-mentioned embodiment is a case of a motorcycle, the present invention is also applicable to a tricycle in which the front wheels 3 are two wheels.
上述したように本発明のチエン駆動装置は、後
アームの後端に広幅タイヤからなる後輪を１個設
け、この後輪を後アーム上の中間軸を介し該中間
軸とエンジン出力軸の間の一次チエンと、中間軸
と後輪の間の二次チエンとにより駆動すべくした
自動二輪車等において、前記中間軸の中間部を後
アーム上に支持し、後アームの左右両側に突出し
た前記中間軸々端の一方に前記一次チエンのスプ
ロケツトを固定し、他方に前記二次チエンのスプ
ロケツトをそれぞれ固定したので、両スプロケツ
トが後アームの左右両側に振り分けられることに
よつて車幅を大きくしたり、また車体長を長くし
たりすることがない。また後アームからの中間軸
の突出長が短くなるため曲げモーメントを小さく
し、それによつて軸径を細くすることができる。
As described above, the chain drive device of the present invention is provided with one rear wheel made of a wide tire at the rear end of the rear arm, and this rear wheel is connected between the intermediate shaft and the engine output shaft via the intermediate shaft on the rear arm. In a motorcycle or the like which is intended to be driven by a primary chain and a secondary chain between an intermediate shaft and a rear wheel, the intermediate part of the intermediate shaft is supported on a rear arm, and the said intermediate shaft protrudes on both left and right sides of the rear arm. Since the sprocket of the primary chain is fixed to one end of each intermediate shaft, and the sprocket of the secondary chain is fixed to the other end, the vehicle width can be increased by distributing both sprockets to the left and right sides of the rear arm. There is no need to increase the length of the vehicle or increase the length of the vehicle. In addition, since the protruding length of the intermediate shaft from the rear arm is shortened, the bending moment can be reduced, thereby making it possible to reduce the shaft diameter.
第１図は本発明によるチエン駆動装置を設けた
自動二輪車の側面図、第２図は同自動二輪車の要
部のみを示す平面図、第３図は中間軸部分の拡大
断面図である。
２……エンジン、４……後輪、７……後アー
ム、１０……中間軸、１１，１２，１３，１４…
…スプロケツト、１５……エンジン出力軸、１
６，１７……チエン、１８……軸支持部材。
FIG. 1 is a side view of a motorcycle equipped with a chain drive device according to the present invention, FIG. 2 is a plan view showing only the main parts of the motorcycle, and FIG. 3 is an enlarged sectional view of an intermediate shaft portion. 2... Engine, 4... Rear wheel, 7... Rear arm, 10... Intermediate shaft, 11, 12, 13, 14...
... Sprocket, 15 ... Engine output shaft, 1
6, 17... Chain, 18... Shaft support member.
Claims (1)
１個設け、この後輪を後アーム上の中間軸を介し
該中間軸とエンジン出力軸の間の一次チエンと、
中間軸と後輪の間の二次チエンとにより駆動すべ
くした自動二輪車等において、前記中間軸の中間
部を後アーム上に支持し、後アームの左右両側に
突出した前記中間軸々端の一方に前記一次チエン
のスプロケツトを固定し、他方に前記二次チエン
のスプロケツトをそれぞれ固定したことを特徴と
する自動二輪車等のチエン駆動装置。1. One rear wheel made of a wide tire is provided at the rear end of the rear arm, and this rear wheel is connected to a primary chain between the intermediate shaft and the engine output shaft via an intermediate shaft on the rear arm,
In a motorcycle or the like that is intended to be driven by a secondary chain between an intermediate shaft and a rear wheel, an intermediate portion of the intermediate shaft is supported on a rear arm, and each end of the intermediate shaft protrudes on both left and right sides of the rear arm. A chain drive device for a motorcycle or the like, characterized in that a sprocket of the primary chain is fixed to one side, and a sprocket of the secondary chain is fixed to the other side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20914783A JPS60104481A (en) | 1983-11-09 | 1983-11-09 | Drive for chain of motorcycle, etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20914783A JPS60104481A (en) | 1983-11-09 | 1983-11-09 | Drive for chain of motorcycle, etc. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60104481A JPS60104481A (en) | 1985-06-08 |
| JPH0448677B2 true JPH0448677B2 (en) | 1992-08-07 |
Family
ID=16568083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20914783A Granted JPS60104481A (en) | 1983-11-09 | 1983-11-09 | Drive for chain of motorcycle, etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60104481A (en) |
-
1983
- 1983-11-09 JP JP20914783A patent/JPS60104481A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60104481A (en) | 1985-06-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |