JPH0976980A - Power transmission device of bicycle - Google Patents
Power transmission device of bicycleInfo
- Publication number
- JPH0976980A JPH0976980A JP25699595A JP25699595A JPH0976980A JP H0976980 A JPH0976980 A JP H0976980A JP 25699595 A JP25699595 A JP 25699595A JP 25699595 A JP25699595 A JP 25699595A JP H0976980 A JPH0976980 A JP H0976980A
- Authority
- JP
- Japan
- Prior art keywords
- pedal
- shaft
- bicycle
- power transmission
- transmission device
- 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
Landscapes
- Automatic Cycles, And Cycles In General (AREA)
- Transmission Devices (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、自転車の動力伝達
装置に関し、更に詳しくは、ペダル軸と前歯車間等の部
位に巻バネが組み込まれ、該巻バネの作用によりペダル
アームの回転トルクが安定的にして、かつ円滑に得られ
るようにされた自転車の動力伝達装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for a bicycle, and more specifically, a winding spring is incorporated in a portion such as between a pedal shaft and a front gear, and the rotation torque of a pedal arm is stabilized by the action of the winding spring. The present invention relates to a power transmission device for a bicycle, which is designed to be obtained smoothly and smoothly.
【0002】[0002]
【従来の技術】従来の自転車では、ペダルの踏み効率を
よくするために、前歯車にオーバルギャを使用し、ペダ
ルの踏み圧による回転入力は自転車を含めた自重のエナ
ーシによって安定化させていた。2. Description of the Related Art In a conventional bicycle, in order to improve pedaling efficiency, an oval gear is used for the front gear, and rotation input by pedaling pressure is stabilized by the inertia of its own weight including the bicycle. .
【0003】[0003]
【発明が解決しようとする課題】ところが、従来の方法
では、チェーンに撓みが生じ易くて摩耗度が大きく、し
たがって、力の均一性に欠けて、推進、加速の円滑性に
欠け、疲労の軽減性に欠けるものであった。However, in the conventional method, the chain is easily bent and the degree of wear is large. Therefore, lack of uniformity of force, lack of smoothness of propulsion and acceleration, and reduction of fatigue. It lacked sex.
【0004】本発明は、このような従来の技術が有する
問題点に鑑みなされたもので、その目的とするところ
は、従来の踏み効率改善策より積極的にペダルの踏み圧
入力を安定化してペダルによる回転効率の向上を計り、
以って、推進、加速の滑らかな疲労の少ない軽快な乗り
心地が得られる自転車を提供することにある。The present invention has been made in view of the above-mentioned problems of the prior art. The purpose of the present invention is to stabilize the pedal pressure input of the pedal more actively than the conventional measures for improving the pedaling efficiency. Measure the improvement of rotation efficiency with the pedal,
Therefore, the purpose of the present invention is to provide a bicycle that can be smoothly propelled and accelerated and has a light and comfortable ride without fatigue.
【0005】[0005]
【課題を解決するための手段】この目的のため、本発明
は、前歯車の内側周壁内に、該前歯車の回転方向と逆方
向に巻装された巻バネが組み込まれ、またはペダル軸と
前歯車軸との間に組み込まれて、該巻バネの作用により
ペダルアームの過大踏み圧によるトルクが巻バネに蓄積
され、ペダル入力の不足時には蓄積されたトルクが補足
されて、ペダルによる回転効率が向上せられる構成を特
徴とするものである。To this end, the present invention relates to a front gear in which a winding spring wound in a direction opposite to the direction of rotation of the front gear is incorporated in the inner peripheral wall of the front gear, or a pedal shaft. It is installed between the front gear shaft and the winding spring to store the torque due to the excessive pedaling pressure of the pedal arm in the winding spring, and when the pedal input is insufficient, the accumulated torque is supplemented to improve the rotation efficiency of the pedal. It is characterized by an improved configuration.
【0006】[0006]
【発明の実施の形態】本発明の実施の形態について図面
を参照して説明する。図1は本発明に係る動力伝達装置
の一例での一部省略の部分断面図、図2は図1の2方向
から見た端面図で、これら図において、ペダル軸受10
により回転自在に軸支されたペダル軸11はペダルアー
ム12と固着されるとともに、ペダルアーム12には前
歯車13が固着され、これらペダル軸11、前歯車13
はペダルアーム12と一体的に回転するようになってい
る。前歯車13の内側には、ペダル軸11を中心とした
周壁部14が突設されるとともに、該周壁部14内に
は、前歯車13の回転方向と逆方向に巻装された巻バネ
15が組み込まれて、その一端部16が周壁部14の一
部分に係合されるとともに、他端部17が、ペダル軸1
1と偏心して一体的に回転する巻バネ受板18の一部分
に係合され、ペダル位置が前上略45度の時点で、両端
部16、17の係合を介して巻バネ15が巻き込まれ、
ペダル位置が前下略135度の時点で、両端部16、1
7いずれかの係合解除により巻き込みが解除されて巻バ
ネ15は0(ゼロ)になるようになっている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view of an example of a power transmission device according to the present invention with some parts omitted, and FIG. 2 is an end view seen from two directions in FIG.
A pedal shaft 11 rotatably supported by the pedal arm 11 is fixed to a pedal arm 12, and a front gear 13 is fixed to the pedal arm 12.
Is designed to rotate integrally with the pedal arm 12. A peripheral wall portion 14 centering on the pedal shaft 11 is projectingly provided inside the front gear 13, and a winding spring 15 wound in the peripheral wall portion 14 in a direction opposite to the rotation direction of the front gear 13. And one end portion 16 thereof is engaged with a part of the peripheral wall portion 14, and the other end portion 17 thereof is
1 is engaged with a part of the coil spring receiving plate 18 which is eccentric to and integrally rotates, and when the pedal position is approximately 45 degrees above the front, the coil spring 15 is coiled through the engagement of both end portions 16 and 17. ,
When the pedal position is approximately 135 degrees below the front, both ends 16, 1
The winding is released by releasing the engagement of any one of 7 and the winding spring 15 becomes 0 (zero).
【0007】周知のように、自転車のペダル軸11の回
転入力は、ペダル位置が前上略45度付近から前下略1
35度位いの間に入力されて、ペダル軸11の1回転中
に2回大きくなったり、小さくなったりする波動入力で
あって、最大点では過大入力になるためのロスが大きい
ため、前記構成により、ペダル軸11の回転力は、ペダ
ル位置が前上略45度付近で巻き込まれる巻バネ15を
介して前歯車13に伝達されて、過大踏み圧によるロス
分は巻き込まれた巻バネ15に蓄積され、ペダル入力の
不足時にはこの蓄力が回転力に加算される。As is well known, the rotation input of the pedal shaft 11 of the bicycle is such that the pedal position is approximately 45 degrees above the front and approximately 1 below the front.
It is a wave input that is input during about 35 degrees and increases or decreases twice during one rotation of the pedal shaft 11, and since there is a large loss for becoming an excessive input at the maximum point, With the configuration, the rotational force of the pedal shaft 11 is transmitted to the front gear 13 via the winding spring 15 that is wound around when the pedal position is approximately 45 degrees above the front, and the loss due to excessive pedaling pressure is wound into the winding spring 15. When the pedal input is insufficient, this accumulated force is added to the rotational force.
【0008】図3は、巻バネ15がペダル軸11と前歯
車13の回転軸である前歯車軸19との間の空間部20
に組み込まれた実施形態を示したもので、巻バネ15の
一端部16は前歯車軸19の内壁面一部分に係合される
とともに、他端部17はペダル軸11の一部分に係合さ
れ、発進時のペダルアーム12の回転によりペダル軸1
1と前歯車13および前歯車軸19がフレーム21に対
して回転し、ペダル位置が前上略45度付近で巻バネ1
5は巻き込まれて100%になったペダル位置が前下略
135度付近で巻バネ端部との係合が外れて巻バネ15
は元に戻って0(ゼロ)となり、ペダルアーム12の回
転中、この巻バネ15の巻き込みと巻き込み解除が繰り
返され、過大踏み圧によるトルクは巻バネ15に蓄力さ
れ、ペダル入力の不足時にはこの蓄力が補足されて、ペ
ダルの回転効率が向上せられる。In FIG. 3, the coil spring 15 has a space 20 between the pedal shaft 11 and the front gear shaft 19 which is the rotation shaft of the front gear 13.
The first end 16 of the coil spring 15 is engaged with a part of the inner wall surface of the front gear shaft 19, and the other end 17 is engaged with a part of the pedal shaft 11 to start the vehicle. When the pedal arm 12 rotates during operation, the pedal shaft 1
1 and the front gear 13 and the front gear shaft 19 rotate with respect to the frame 21, and when the pedal position is approximately 45 degrees above the front, the coil spring 1
5 is wound up to 100% and the pedal position is close to the front lower 135 degrees and the engagement with the end of the winding spring is released.
Returns to 0 (zero), the winding spring 15 is repeatedly wound and unwound during the rotation of the pedal arm 12, and torque due to excessive pedaling pressure is stored in the winding spring 15, and when the pedal input is insufficient, By supplementing this accumulated force, the rotation efficiency of the pedal is improved.
【0009】図4に示されている実施形態は、巻バネ1
5を図3に示されているゼンマイ(板バネ)状バネに変
えてコイル状バネとした場合であって、他の構成並びに
作用効果については、図3に示されている場合と同様で
ある。したがって、その説明は省略する。The embodiment shown in FIG. 4 has a winding spring 1
5 is a coil-shaped spring instead of the spring (leaf spring) -shaped spring shown in FIG. 3, and other configurations and operational effects are the same as those shown in FIG. . Therefore, its explanation is omitted.
【0010】図5は、巻バネ15(コイル状バネのみが
示されている)が後歯車22の後歯車軸23と後輪ハブ
24の軸部25との間の空間部26に組み込まれた実施
形態を示したもので、巻バネ15の一端部16は後輪ハ
ブ軸部25の内壁面一部分に係合されるとともに、他端
部17は後輪車軸23の外周面一部分に係合され、発進
により巻バネ15が巻き込まれ、また巻き込み解除され
て、後歯車22に残っているトルクのむらは安定化され
て動輪に伝達されるようになっている。In FIG. 5, a coil spring 15 (only a coil spring is shown) is incorporated in a space 26 between the rear gear shaft 23 of the rear gear 22 and the shaft portion 25 of the rear wheel hub 24. In the embodiment, one end portion 16 of the winding spring 15 is engaged with a part of the inner wall surface of the rear wheel hub shaft portion 25, and the other end portion 17 is engaged with a part of the outer peripheral surface of the rear wheel axle 23. The winding spring 15 is wound and unwound by the start, and the unevenness of the torque remaining in the rear gear 22 is stabilized and transmitted to the driving wheel.
【0011】[0011]
【発明の効果】しかして、本発明によれば、発進により
巻き込まれる巻バネの作用によって、ペダルによる回転
効率は向上せられ、推進、加速の滑らかな、従来車に比
して乗りやすく、かつ疲労度の少ない自転車が提供し得
られるものである。As described above, according to the present invention, the action of the winding spring wound by the start improves the rotation efficiency of the pedal, and the propulsion and acceleration are smoother and easier to ride than the conventional vehicle, and A bicycle with less fatigue can be provided and obtained.
【図1】本発明に係る動力伝達装置の一例での一部省略
の部分断面図である。FIG. 1 is a partial cross-sectional view with a part omitted in an example of a power transmission device according to the present invention.
【図2】図1の2方向から見た端面図である。FIG. 2 is an end view as seen from two directions in FIG.
【図3および図4】本発明の他例を示す一部省略の部分
断面図である。FIG. 3 and FIG. 4 are partially omitted partial cross-sectional views showing another example of the present invention.
【図5】本発明の更なる他例を示す半断面図である。FIG. 5 is a half sectional view showing still another example of the present invention.
【符号の説明】 10 ペダル軸受 11 ペダル軸 12 ペダルアーム 13 前歯車 14 周壁部 15 巻バネ 16 巻バネ一端部 17 巻バネ他端部 18 巻バネ受板 19 前歯車軸 20、26 空間部 21 フレーム 22 後歯車 23 後歯車軸 24 後輪ハブ 25 軸部[Explanation of Codes] 10 Pedal Bearing 11 Pedal Shaft 12 Pedal Arm 13 Front Gear 14 Circumferential Wall 15 Winding Spring 16 Winding Spring One End 17 Winding Spring Other End 18 Winding Spring Bearing Plate 19 Front Gear Shaft 20, 26 Space 21 Frame 22 Rear gear 23 Rear gear shaft 24 Rear wheel hub 25 Shaft
Claims (3)
方向と逆方向に巻装された巻バネが組み込まれて、該巻
バネの作用によりペダルアームの過大踏み圧によるトル
クが巻バネに蓄積され、ペダル入力の不足時には蓄積さ
れたトルクが補足されて、ペダルによる回転効率が向上
せられる構成を特徴とする自転車の動力伝達装置。1. A winding spring wound in a direction opposite to the rotation direction of the front gear is incorporated in an inner peripheral wall of the front gear, and a torque generated by excessive pedaling pressure of a pedal arm is wound by the action of the winding spring. A power transmission device for a bicycle, characterized in that the torque stored in a spring is supplemented when the pedal input is insufficient to improve the rotation efficiency of the pedal.
に組み込まれている請求項1の自転車の動力伝達装置。2. The power transmission device for a bicycle according to claim 1, wherein the coil spring is incorporated between the pedal shaft and the front gear shaft.
に組み込まれている請求項1の自転車の動力伝達装置。3. The power transmission device for a bicycle according to claim 1, wherein the coil spring is incorporated between the rear gear shaft and the rear wheel hub.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7256995A JP3015719B2 (en) | 1995-09-08 | 1995-09-08 | Bicycle power transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7256995A JP3015719B2 (en) | 1995-09-08 | 1995-09-08 | Bicycle power transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0976980A true JPH0976980A (en) | 1997-03-25 |
JP3015719B2 JP3015719B2 (en) | 2000-03-06 |
Family
ID=17300263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7256995A Expired - Fee Related JP3015719B2 (en) | 1995-09-08 | 1995-09-08 | Bicycle power transmission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3015719B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009054161A1 (en) | 2007-10-22 | 2009-04-30 | Yoichiro Hamamoto | Rotation transmission mechanism for human power vehicle and human power vehicle and bicycle with the same |
CN103072661A (en) * | 2013-02-04 | 2013-05-01 | 李金栋 | Energy accumulation device and bicycle adopting device |
JP6370460B1 (en) * | 2017-10-30 | 2018-08-08 | 富雄 柿見 | Bicycle shock absorber and bicycle |
-
1995
- 1995-09-08 JP JP7256995A patent/JP3015719B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009054161A1 (en) | 2007-10-22 | 2009-04-30 | Yoichiro Hamamoto | Rotation transmission mechanism for human power vehicle and human power vehicle and bicycle with the same |
CN103072661A (en) * | 2013-02-04 | 2013-05-01 | 李金栋 | Energy accumulation device and bicycle adopting device |
JP6370460B1 (en) * | 2017-10-30 | 2018-08-08 | 富雄 柿見 | Bicycle shock absorber and bicycle |
JP2019081527A (en) * | 2017-10-30 | 2019-05-30 | 富雄 柿見 | Shock absorber for bicycle and bicycle |
Also Published As
Publication number | Publication date |
---|---|
JP3015719B2 (en) | 2000-03-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |