STEPLESS SPEED CHANGE DEVICE FOR BICYCLE

• Main Author: OISHI YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 07.06.2018
• Subjects: BLASTING; CYCLES; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; POWERED PROPULSION OF SLEDGES OR; RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; THERMAL INSULATION IN GENERAL; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES; TRANSPORTING; WEAPONS

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