Continuously variable speed bicycle with friction wheel transmission

Abstract

The invention discloses a friction wheel transmission stepless transmission bicycle, which comprises a bicycle frame, handlebars, a speed regulating handle, a front wheel, pedals, a front flywheel, a chain, a back flywheel, a rotating direction changing device, a rotating shaft, a friction wheel transmission device, a speed regulating device, a back wheel and a back wheel axle, wherein the rotating direction changing device comprises two mutually engaged bevel gears, one bevel gear is synchronously connected with the back fly wheel, the other bevel gear is connected with the rotating shaft, further, the rotating input of the rotating shaft is realized, the friction wheel transmission device comprises a friction disc, a spring, a regulating screw nut and a friction wheel, the friction disc, the spring and the regulating screw nut are arranged on a back axle, the friction wheel synchronously rotates with the rotating shaft, one end of the rotating shaft is provided with a spline, a friction wheel is glidingly connected onto the spline position, and the friction wheel is in vertical and tight contact with the friction disc. The friction wheel transmission stepless transmission bicycle has the advantages that the stable speed change can be realized under any road conditions, the speed change amplitude is great, the speed change is stable, meanwhile, through the modification on the existing bicycle, the manufacturing is simple, the cost is low, economic performance and reasonableness are realized, and the applicability is high.

Description

technical field [0001] The invention relates to a vehicle, in particular to a continuously variable speed bicycle driven by friction wheels. Background technique [0002] Bicycles have been invented and used for more than 550 years. According to the needs of different users, bicycles can be divided into single-stage, multi-stage and continuously variable speed bicycles. The continuously variable speed bicycles currently on the market mainly refer to TheRide New Finch CVT star transmission bicycle invented in 1999. This product is to install a transmission box at the rear axle of the bicycle, and place two thin metal discs inside as power. The input and output device boldly cancels the chain gear shift setting of the previous bicycle, and the shift device completely relies on the fuzzy adjustment device integrated with the handlebar of the bicycle. By adjusting the arc of a group of small balls in the CVP continuously variable transmission box contacting the power input turnt...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of limited range of speed change in stepped speed change of bicycles, complicated structure and high cost of stepless speed change in the past, the present invention provides a method that can realize stable speed change under any road conditions, with large speed change range and stable speed change; at the same time, it can By modifying the existing bicycles, the continuously variable speed bicycles driven by friction wheels are simple to manufacture, low in cost, reasonable in economy and strong in applicability

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