The invention provides an internal differential transmission for a bicycle, which comprises a driving body used for transmitting manual driving force, a fixing piece used for fixing a speed changing unit, the speed changing unit and a control part. The speed changing unit changes the speed of motion input by the driving body and then outputs the motion through the second rotating body or the fourth rotating body. The control part can move along the axial direction of the first fixed shaft, and can control the connection and separation of the first rotating body and the second rotating body with the fixing piece and the connection and separation of the first rotating body and the fourth rotating body with the driving body in the moving process. The differential gear train composed of the first rotating body, the second rotating body, the third rotating body and the fourth rotating body serves as a main body, the gear modulus can be increased while the boundary dimension is met, the bending strength is greatly improved, and the service life of the transmission is prolonged.
本发明提供一种自行车用内差动变速器,包括用于传递人力驱动力的驱动体、用于固定变速单元的固定件、变速单元以及控制部,其中,变速单元将驱动体输入的运动进行变速后由第二旋转体或第四旋转体输出,控制部可沿第一定轴的轴向移动,并在移动的过程中可控制第一旋转体和第二旋转体与固定件的连接与分离,以及第一旋转体和第四旋转体与驱动体的连接与分离;本发明以第一旋转体、第二旋转体、第三旋转体以及第四旋转体所组成的差动轮系为主体可以在满足外形尺寸的同时能增加齿轮模数,使弯曲强度大大增强,增加变速器的使用寿命。
Internal differential transmission for bicycle
一种自行车用内差动变速器
2020-09-11
Patent
Electronic Resource
Chinese
BICYCLE SHIFTING DEVICE AND BICYCLE INTERNAL TRANSMISSION HUB
European Patent Office | 2018
|Bicycle shifting device and bicycle internal transmission hub
European Patent Office | 2020
|