Among various transmission forms, gear transmission is used in modern machinery

Among various transmission forms, gear transmission is the most widely used in modern machinery.This is because gear transmission has the following characteristics:
1) High transmission accuracy.As mentioned earlier, belt transmission cannot guarantee an accurate transmission ratio, and chain transmission cannot achieve a constant instantaneous transmission ratio. However, the transmission ratio of modern involute gears is theoretically accurate and constant.This is not only a key requirement for precision machinery and instruments, but also an important condition for reducing dynamic load and achieving smooth transmission under high-speed and heavy-load conditions.
2) Wide application range.The power range transmitted by the gear drive is extremely wide, from 0.001W to 60000kW; the peripheral speed can be very low, or as high as 150m/s, which is incomparable with the belt drive and the chain drive.
3) It can realize the transmission between any two shafts in spaces such as parallel shafts, intersecting shafts, and staggered shafts, which is also impossible with belt transmission and chain transmission.
4) Reliable work and long service life.
5) The transmission efficiency is relatively high, generally 0.94~0.99.
6) The manufacturing and installation requirements are high, so the cost is also high.
7) The requirements for environmental conditions are strict. Except for a few low speed and low precision situations, it is generally required to be placed in the box cover to prevent dust and scale, and it is also necessary to pay attention to lubrication.
8) It is not suitable for transmission between two shafts that are far apart.
9) Vibration damping and impact resistance are not as good as belt drives and other flexible drives.