Novel variable-speed labor-saving bicycle

Abstract

The invention discloses a novel variable-speed labor-saving bicycle comprising a main bicycle frame, a first telescopic lower frame, a second telescopic lower frame, a wheel assembly, a boosting assembly, a pedal assembly and a transmission assembly, a handlebar is installed at one end of the main bicycle frame, a rear seat is installed at the other end of the main bicycle frame, and the second telescopic lower frame is movably inserted into the end, close to the handlebar, of the main bicycle frame in a penetrating mode. The bicycle has the advantages that a transmission rod and a connecting structure are used for replacing chain transmission, riding is achieved, multi-stage speed changing can be conducted, the stability of multi-stage speed changing is guaranteed, when a short slope or an uneven road surface is met, the vehicle can be boosted through the weight of the main frame and the weight of a rider, and the physical strength of the rider is saved. The heights of pedals can be adjusted to adjust the heights of the pedals in real time according to the leg length of a rider so as to adjust the pedaling strength, the segmented tires are used, the whole tires do not need to be replaced when the tires are replaced, damping can be conducted from the tires and the whole bicycle, and the riding comfort is improved.

Description

technical field [0001] The invention belongs to the field of bicycles, and in particular relates to a novel variable-speed and labor-saving bicycle. Background technique [0002] A bicycle, also known as a bicycle or bicycle, is usually a small land vehicle with two wheels. After a person rides on the car, it is powered by pedals, which is a green and environmentally friendly means of transportation. There are many types of bicycles, including single bicycles, tandem bicycles, and multi-person bicycles. Bicycles can be used as an environmentally friendly means of transportation for transportation and travel; more and more people use bicycles as fitness equipment for cycling and exercising; Bicycle itself is also a competitive sport, including road bike race, mountain bike race, track bike race, stunt bike race, etc.; among the 25 parts of the bicycle frame, tires, pedals, brakes, chains, etc., the basic parts are missing. One must. Among them, the frame is the skeleton of...

AI Technical Summary

Problems solved by technology

[0003] Most of the current bicycles are driven by chains, which can achieve the purpose of multi-stage speed change, but the chains are easy to break and will come out of the sprockets when used for a long time, which is very inconvenient to use. Some manufacturers also use gears, transmission rods, etc. instead of chains for transmission. However, the transmission mode of such structures as gears and transmission rods is not convenient for multi-stage speed change, and its transmission speed ratio is fixed and cannot be selected according to road conditions. Therefore, existing bicycles cannot simultaneously perform multi-stage transmission when replacing chains for stable transmission. variable speed;

[0004] And when going up a short slope, the rider needs to accumulate speed in advance to use the inertia of the bicycle to ride up at one go, so it is very laborious when going uphill, and when riding on uneven road conditions, the bicycle bumps up and down, and riding is very laborious. The bicycle is very strenuous when going up short slopes or on uneven roads;

[0005] The turnover diameter of the existing pedals is fixed, and the turnover diameter of the pedals cannot be selected in good time according to the height of the rider's body. Although the rider can adjust the pedal turnover diameter of the legs by adjusting the height of the seat, but in When riding, it is found that because the turnover diameter of the pedals is fixed, the highest and lowest points of the knees are also fixed during cycling. For example, a short person still needs to lift his legs high when riding a bicycle, which is inconvenient to use;

[0006] The tires of existing bicycles mostly inflate the inner tubes, but when the tires are broken, the whole inner tubes need to be replaced or repaired, but the tires also need to be replaced if the repair times are too many. Need to inflate, but the shock absorption of this kind of wheel is poor, and the whole tire needs to be taken off if one damage occurs, which is very inconvenient to use

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