Motorcycle highlights (6 pieces)
The development of trailer has experienced the vicissitudes of 100 years.
The original motorcycle, a real model existing in Munich Science and Technology Museum, Germany, is the world's first motorcycle patented by Daimler in Germany on August 29th, 1885.
100 years ago, the gasoline engine at that time was still in a low-level and naive state, and the vehicle manufacturing at that time was still in the stage of carriage technology. Primitive motorcycles are quite different from modern motorcycles in appearance, structure and performance. The original motorcycle frame was made of wood. Judging from the wood grain, it is made by carpenters and the wheels are also made of wood. The outer layer of the wheel is covered with a layer of iron. There are several square wooden frames in the middle and lower part of the frame, on which the engine is placed. There are small support wheels on both sides of the wooden frame to prevent it from toppling when it is still. Therefore, the car actually landed on four wheels. Single cylinder fan cooling engine, output power
motorcycle
This force drives the rear wheel forward through the two-stage reduction transmission of belt and gear. The car seat is saddle-shaped and covered with leather. The working volume of engine cylinder is 264mL, and the maximum power is 0.37kW(700r/min), which is only 1/5 of that of modern simple motorcycle. Speed 12km, not much faster than walking. Because there were no buffers such as springs at that time, this kind of car was called "bone shaking car". As you can imagine, driving on the stone street in the19th century is worse than execution. Although the original motorcycle was so simple, since then, motorcycles have been constantly changed and improved. 100 years ago, hundreds of millions of descendants of modern motorcycles have emerged.
Compared with German motorcycles, American motorcycles, among which Harry Davidson Company is world-famous. 1903 1 (the earliest commercial motorcycle in the United States) produced by Harley company in the United States, the working volume of engine cylinder is 409mL, the power is 2.94kW, and the bicycle frame is adopted. Motorcycle is a product of the times, and it is a model that reflects the level of science and technology at that time, that is, motorcycles at different stages are marked with the development of science and technology in different times. The original motorcycle could not be used because the technology at that time could not meet the most basic parts needed for its normal operation, so it could only be put in the laboratory.
Military motorcycle
19 from the 1990s to the early 20th century, early motorcycles began to have practical value by adopting new inventions and technologies at that time, such as pneumatic rubber tires, ball bearings, clutches and transmissions, front suspension damping systems, spring seats, etc. Mass production in the factory and become a commodity. This is the second generation motorcycle, which is called commodity motorcycle. For example, 19 12 X -8A single-cylinder motorcycle produced by Harley Company in the United States. At that time, the transmission and transmission system had not been solved, only the belt was used to drive the big pulley attached to the rear wheel, and the rear brake shoe was pulled by the handle to brake. At that time, the problem of the rear shock absorber was not solved, and the front shock absorber had a simple shock absorber attached to the front fork.
After 1930s, with the continuous progress of science and technology, motorcycle production adopted rear suspension damping system, mechanical ignition system, drum mechanical braking device, chain drive and so on. , make the motorcycle climb to a new level, gradually mature and widely used in transportation, competition and military. This is the third stage of the motorcycle-the mature stage. From 65438 to 0936, American Harley Company has been able to manufacture high-level motorcycles. The car uses a V-type twin-cylinder engine, 1000mL, OHV, 27.93kW, and the top speed150 km/h/h.