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History of Gear
Classification： Blog
Release time：2024-06-20
As early as 350 BC, the ancient Greek philosopher Aristotle recorded gears in the literature. Around 250 BC, the mathematician Archimedes also described in the literature the use of a turbine worm hoist. In the ruins of Ketesfin in present-day Iraq, there are still gears of the BC era.
Gear also has a long history in our country. According to historical records, gears have been used in ancient China as far back as 400-200 BC. The bronze gears unearthed in Shanxi, China, are ancient gears that have been discovered so far. As a guide to reflect the achievements of ancient science and technology, it is a mechanical device with gear mechanism as the core. The Italian Renaissance in the second half of the 15th century, the all-round Leonardo. Leonardo da Vinci, not only in culture and art, but also left indelible achievements in the history of gear technology. After more than 500 years, the current gear still retains the prototype of the sketch at that time.
Until the end of the 17th century, people began to study the correct transmission of motion of the tooth shape. In the 18th century, after the European Industrial Revolution, the application of gear transmission became more and more extensive; first, the development of cycloid gears, and then involute gears, until the beginning of the 20th century, involute gears have been dominant in the application. Subsequently, the development of modified gears, circular arc gears, bevel gears, helical gears and so on.
Modern gear technology has reached: gear modulus 0.004-100mm; The diameter of the gear ranges from 1mm to 150 m; The transmission power can reach 100,000 kilowatts. The rotating speed can reach 100,000 revolutions per minute. The high circumferential speed reaches 300 m/s.
Internationally, the power transmission gear device is developing along the direction of miniaturization, high speed and standardization. The application of special gears, the development of planetary gear devices, and the development of low vibration and low noise gear devices are some of the characteristics of gear design.
keyword： Gear,Shaft
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