Gear transmission is mechanical transmission using two gear teeth meshing transmission power and motion.

According to the relative position of the gear axis parallel to the axis of cylindrical gear transmission division, bevel gear drive shaft and intersecting cross axis helical gears. Has the characteristics of compact structure, high efficiency, long service life etc..

1) according to the relative position and the tooth axis direction, can be divided into the following types:

<1>cylindrical gear transmission;

<2>bevel gear transmission;

<3>crossed helical gear drive.

(2) according to the working condition of gears, can be divided into:

<1>open gear drive gear drive, gear exposed, does not guarantee good lubrication.

<2>semi open gear drives, gear oil immersion pool, with shields, but not closed.

<3>closed gear transmission, gear, shaft and bearings are installed in the closed box, good lubrication condition, dust is not easy to enter, the installation accuracy, Gear has a good working conditions, is the most widely used gear.