In the same kind of products, according to the basic structure of the chain, i.e. according to the shape of the components, the parts and parts meshed with the chain, the size proportion between the parts, etc., the chain product series is divided. There are many kinds of chains, but their basic structure is only the following, others are all these kinds of deformation. We can see from the above chain structures that most of the chains are composed of chain plate, chain pin, shaft sleeve and other components. Other types of chain only make different changes to the chain plate according to different requirements. Some of them are equipped with scraper on the chain plate, some of them are equipped with guide bearings on the chain plate, and some of them are equipped with rollers on the chain plate, etc., which are all for the purpose of refitting in different application occasions. According to different purposes and functions, the chain can be divided into four types: transmission chain, conveying chain, traction chain and special chain. 

1. Transmission chain: mainly used to transmit power chain. 

2. Conveying chain: mainly used for conveying materials. 

3. Hauling chain: mainly used for hauling and lifting chain. 

4. Special special chain: mainly used for the chain with special function and structure on special mechanical device.