The bicycle was invented by a Frenchman, Sifrak. A.D. 1790 developed into a wooden bicycle without handlebars, pedals and chains. The car is shaped like a wooden horse, with two wheels nailed to its feet and fixed on a line. Because this kind of bicycle has no driving device and steering device, the cushion is low, so it can only land with its feet and push it back hard to make the bicycle move straight forward.

Bicycle is one of the most successful human machines invented by human beings. This is a complex machine composed of many simple machines. During the Kangxi period of the Qing Dynasty, Huang Lvzhuang devoted himself to developing bicycles. Unofficial history Grand View in the Qing Dynasty recorded: "Huang Lvzhuang built a two-wheeled vehicle, which was more than three feet long and could seat one person without pushing or pulling.

When you walk, your arm turns once around the axis, then you walk once again as before, and your arm walks 80 miles around the sun. "As you can see, the bicycle he made has a wheel before and after, and the cyclist can turn it by hand, and the bicycle can move forward. This is the earliest bicycle recorded in historical records. About after Huanglvzhuang 100, French Sifrak people made wooden bicycles in 1790.

Bicycle is a traditional industry with a history of more than 65,438+000 years. Due to environmental protection and traffic problems, bicycles have once again become a favorite transportation and fitness tool for residents in all countries of the world, especially in developed countries. In developed countries such as the United States, Europe and Japan, the focus of the world bicycle industry is shifting from traditional means of transportation to sports, mountains and leisure.

Bicycle is a common product for sports, fitness, leisure and entertainment. There is a great demand for bicycles all over the world every year. According to the statistics of Japanese CYCLEPRESS, the global demand for bicycles remains at the level of 65.438+0.06 billion, and the annual turnover of bicycles is about 5 billion US dollars.

Extended information: brief introduction of bicycle development history;

1. Bicycle is a kind of land vehicle that uses human pedals to drive two wheels, commonly known as free car, bicycle or bicycle. Bicycle has been loved by people since it was born in18th century. It has become the best choice for people's fitness and environmental protection travel.

2./kloc-At the end of 0/8, the Frenchman Sifrak invented the earliest bicycle. This kind of earliest bicycle is made of wood and its structure is relatively simple. It has neither driving device nor steering device. Cyclists push forward with their feet and can only get off and move the car when they change direction.

Even so, when Sifrak went for a ride in the park on this bike, everyone present was quite surprised and amazed. The earliest bicycles The first batch of truly practical bicycles in the world appeared in1at the beginning of the 9th century.

4. 18 17, German delaisse invented a wooden two-wheeled bicycle with handlebars in Paris. Although this kind of bicycle can still move forward with pedals, it can change its direction while moving forward, which has aroused great interest since it came out.

The French copied a lot, and hundreds of bicycles appeared on the streets of Paris at one time. 1830, the French government also equipped the postman with bicycles as a means of transportation. Subsequently, the technology and performance of bicycles continued to improve. 1839, the British Macmillan invented the pedal bicycle. You don't have to pedal your feet when riding, which improves the driving speed.

6. 1869 Renault bicycle, the frame is made of steel pipe, and the wheels are also made of steel rings and spokes. It uses solid tires to turn to make the bicycle lighter. ?

7. 1886 British mechanical engineer stahly designed a new bicycle style, with front fork and brakes, and the front and rear wheels are the same size to keep balance. He made a diamond-shaped frame out of steel pipes and used rubber wheels for the first time. Stahly not only improved the structure of bicycles, but also transformed many machine tools for producing bicycle parts, which opened up a broad road for mass production and popularization of bicycles.

Therefore, it was called "the father of bicycles" by later generations. The bicycle model he designed is basically the same as the current bicycle. 1887, British Lawson completed the design of chain-driven bicycles. In the same year, Dunlop, an Englishman, developed pneumatic tires. Since then, bicycle technology has also been commercialized, mass-produced and put into the market.

Reference: History of Bicycle Development in Baidu Encyclopedia