Drive chain type：
Chain can be divided into transmission chain, lifting chain and drag chain. Lifting chain and drag chain are used for hoisting and transportation machinery. The transmission chain is widely used in general mechanical transmission. This chapter only introduces transmission chain. Transmission chains can be divided into roller chains and toothed chains.
The chain drive consists of a chain and a chain that is mounted on a parallel shaft, which continuously engages the transmission movement and power through the continuous meshing of the chain and sprocket teeth.
The characteristics of transmission chain：
1)Compared with belt drive, there is no elastic sliding, which can maintain accurate average transmission ratio and high transmission efficiency. The chain does not require a large tensioning force, so the axle and bearing are less loaded. No skid, reliable transmission, strong overload ability, good work under low speed overload;
2)Compared with gear transmission, it can have larger center distance and can work in high temperature environment and dusty environment.
3)The disadvantage is that chain of instantaneous speed and instantaneous transmission ratio is change, driving stability is poorer, with shock and noise in work, not suitable for high speed occasions, do not apply to the frequent change of rotation.
