Bicycle

Abstract

The invention discloses a bicycle. A middle shaft wheel is mounted on a middle shaft of a traditional bicycle, and a pair of chain wheels is respectively additionally mounted on the middle shaft and a rear shaft and is connected by a chain to form an auxiliary transmission system of the bicycle. In addition, the front wheel diameter of the bicycle is smaller than the rear wheel diameter, the bicycle is also provided with a spring-tightening device comprising the chain for the transmission of driving force and an energy storage chainwheel which is arranged on the middle shaft and is provided with a spring, and the chain for the transmission of the driving force connects the foot pedals and the energy storage chainwheel. The bicycle is ensured to continuously run under discommodious accidents which often occur to a traditional bicycle, can be more labor-saving and high-efficiency, is simple to modify and has low cost and good effect.

Description

technical field [0001] The present invention relates to the field of bicycles. Background technology 7 [0002] There is a folk saying: "The chain is dropped at a critical moment", which vividly reflects the problems in the power transmission system of traditional bicycles. Traditional bicycles only have one chain to transmit power in structure, so people who ride bicycles in a hurry, I am most afraid of dropping the chain. If the bicycle chain can continue to move forward after the chain is dropped, this is the greatest hope of the cyclist. [0003] In addition, traditional bicycles also often have front or rear wheel blowouts, or other failures, which cause the bicycle to fail to continue driving, which brings great inconvenience to the cyclist. [0004] In addition to the above-mentioned two common problems, bicycles also have the problem of high consumption of human body energy. For example, traditional bicycles use the structure of the same size of front wheels and rea...

AI Technical Summary

Problems solved by technology

[0002] There is a folk saying: "The chain is dropped at a critical moment", which vividly reflects the problems in the power transmission system of traditional bicycles. Traditional bicycles only have one chain to transmit power in structure, so people who ride bicycles in a hurry, I am most afraid of dropping the chain. If the bicycle chain is dropped, it can continue to move forward. This is the greatest hope for cyclists.

[0003] In addition, traditional bicycles also often have front or rear wheel punctures, or other failures, causing the bicycle to be unable to continue driving, which brings great inconvenience to cyclists

[0004] In addition to the above-mentioned two common problems, bicycles also have the problem of high consumption of human body energy. For example, traditional bicycles use the structure of the same size of front wheels and rear wheels. During use, the front wheels produce great resistance. This adds a lot of physical energy consumption to the cyclist

[0005] At present, there are many researches on improving the traditional bicycle to make the bicycle more efficient and labor-saving, such as adding an electric power system to the bicycle, or installing a large wheel on the rear wheel and using the principle of leverage to pull, or installing a pulley on the center shaft Disc and reciprocatingly shrinkable crank, or changing circular drive gears to oblate and elliptical drive gears, etc., although these modifications can all play a certain role in saving labor when riding a bicycle, the labor-saving effect is not significant, and It is complicated to improve, and the cost is also high, and it is impossible to solve the above-mentioned problems that often occur in bicycles such as puncture and chain drop.

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