Pressure type stepless speed change bicycle

Abstract

The invention discloses a pressure type stepless speed change bicycle. The bicycle comprises a driving wheel group device, the driving wheel device comprises a front extending driving wheel and a rearextending driving wheel, the front extending driving wheel and the rear extending driving wheel are connected and driven through a chain, a central shaft penetrates through the center of the front extending driving wheel, the central shaft penetrates through a vehicle frame, a penetrating front driving bottom plate and front driving wheel cover are arranged on one side of the central shaft, the front extending driving wheel is arranged between the front driving bottom plate and the front driving wheel cover, a front central gear is arranged in the front extending driving wheel, the center ofthe central gear is connected with the central shaft, an extending gear tooth meshes with the periphery of the front central gear, the main body of the extending gear tooth is comma-shaped, and a geararc is arranged on one side of the extending gear tooth. By means of the bicycle, the detects of the prior art are overcome, transmission ratio is automatically adjusted, and therefore comfortable riding experience without abrupt sense is achieved.

Description

technical field [0001] The invention relates to the field of bicycles, in particular to a pressure type continuously variable speed bicycle. Background technique [0002] At present, the most common variable speed bicycles on the market are manual variable speed bicycles, including frame, handle, seat, front and rear wheels, pedals, transmission sprocket group, etc., by changing the size of the sprocket and changing the transmission ratio to perform gear shift adjustment This type of bicycle will have a sense of frustration when changing gears. For example, when going uphill, if you fail to change to the correct gear in time, the rider will feel very strenuous, and you cannot adjust the shifting level according to the specific slope , bring a lot of inconvenience in riding, need urgently a kind of more comfortable variable-speed bicycle. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the pr...

AI Technical Summary

Problems solved by technology

[0002] At present, the most common variable speed bicycles on the market are manual variable speed bicycles, including frame, handle, seat, front and rear wheels, pedals, transmission sprocket group, etc., by changing the size of the sprocket and changing the transmission ratio to perform gear shift adjustment This type of bicycle will have a sense of frustration when changing gears. For example, when going uphill, if you fail to change to the correct gear in time, the rider will feel very strenuous, and you cannot adjust the shifting level according to the specific slope , brings a lot of inconvenience in riding, urgently needs a kind of more comfortable variable-speed bicycle

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