Effort-saving bicycle

Abstract

The invention discloses an effort-saving bicycle which is a travelling tool for riding instead of walk for people. The effort-saving bicycle is formed by assembling a bicycle handlebar, a front fork,a big frame, a seat, an inserting pipe, a front wheel, a rear wheel, a front brake, a rear brake, a center shaft, left arc-shaped cranks, right arc-shaped cranks, a left thumb shifter, a right thumb shifter, a speed-changing gear disc, a chain, a crankset and pedals. The effort-saving bicycle is characterized in that according to the lever principle, it is known that the longer the cranks of the bicycle are, the larger generated force is, and therefore, the cranks, with the length being 17.5 cm, of an existing bicycle are lengthened to be 28-36 cm (the details are shown as the number 1 in thefigure 1) and made into the arc-shaped vertical cranks shown in the figure 2 and the figure 3, and the acute-angle arc-shaped cranks shown in the figure 4 and the figure 5; and the center shaft is mounted with the distance between the center shaft and the ground being increased to be 38-45 cm (the details are shown as the number 3 in the figure 1), the horizontal distance between an inserting pipeopening of the seat and the center shaft is 25-35 cm, the length of the big frame of the bicycle is increased by 5-12 cm, and thus, the maximum beneficial effect is that the effort for riding the bicycle is saved by 1-1.7 times than the effort for riding the existing bicycle.

Description

Technical field: [0001] The patent of the invention is a tool for people to go out, the labor-saving bicycle figure 1 , especially can be more labor-saving than the existing bicycles, and the riding speed is faster, it involves the bicycle central axis ( figure 1 2) The lengthening of the installation point and the crank and the lengthening of the body, and the horizontal distance between the seat and the central axis. Background technique: [0002] At present, known bicycles are composed of handlebars, front forks, large frames, stools, intubation pipes, front wheels, rear wheels, front brakes, rear brakes, left and right cranks, left and right finger dials, central shaft, speed change discs, chains, and power chainrings. , Pedal assembly. It acts on the bicycle pedal through human power, and the crank drives the chainring through the chain to make the bicycle move forward. According to the principle of leverage, the longer the crank of the bicycle, the greater the force...

AI Technical Summary

Problems solved by technology

According to the principle of leverage, the longer the crank of the bicycle, the greater the force. The existing bicycle crank is 17.5 cm long minus the radius of the chainring 9 cm. The actual length of the crank force is 8.5 cm. The existing bicycle has reduced the diameter of the chainring twice. For the first time, the diameter of the chainring is reduced to 14 cm, and the crank is increased by 2.5 cm, referred to as 2 bars, and the length of the crank force is 10 cm. 13.5 cm, referred to as 1 bar, although the power is increased, but at the same time, the cadence is increased to slow down the cycling speed, but it still does not achieve the best effort saving, and the power is insufficient

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