PROBLEM TO BE SOLVED: To provide a stepless speed change device for a bicycle, which performs smooth stepless speed change, has a simple structure, can be provided at a low cost, is reduced in noise, vibration, electric loss, and so on without stopping pedal drive during speed change, and is less likely to wear in each of components.SOLUTION: In a stepless speed change device for a bicycle, a sun gear 3 is mounted on a drive shaft 1, which rotates by means of pedals, so as to be no-rotatable with respect to the drive shaft; an internal planetary gear 5 is engaged with the solar gear; an external planetary gear 7 is engaged with the internal planetary gear; an internal gear 9 is mounted on the drive shaft so as to be freely rotatable with respect to the drive shaft; the planetary gear is engaged with the internal gear; a planetary gear support 11 is mounted on the drive shaft so as to be freely rotatable with respect to the drive shaft only in one direction; the internal planetary gear and the external planetary gear are pivotally supported by the planetary gear support so as to be freely rotatable; and the internal gear is connected to a wheel.SELECTED DRAWING: Figure 1

    【課題】無段階の変速を円滑に行うのみならず、構造が簡単であって安価に提供することができ、変速時にペダルの駆動を停止させることなく、騒音、振動、電動ロス等が小さく、構成各部が摩耗し難い自転車用無段変速機を提供する。【解決手段】ペダルにより回転する駆動軸1には太陽歯車3を該駆動軸に対し回転不能に取り付け、該太陽歯車には内側遊星歯車5を歯合させ、該内側遊星歯車には外側遊星歯車7を歯合させ、該駆動軸には内歯車を9を該駆動軸に対し回転自在に取り付け、該内歯車に該遊星歯車を歯合させ、該駆動軸には遊星歯車支持体11を該駆動軸に対し一方向にのみ回転自在に取り付け、該遊星歯車支持体に該内側遊星歯車と外側遊星歯車とをそれぞれ回転自在に軸支させ、該内歯車を車輪に連結させてなる自転車用無段変速機。【選択図】図1


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    Title :

    STEPLESS SPEED CHANGE DEVICE FOR BICYCLE


    Additional title:

    自転車用無段変速機


    Contributors:

    Publication date :

    2018-06-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer / F16H Getriebe , GEARING



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