According to the analysis of connection and fastening in Chapter VI of Mechanical Design Manual, the common connection structures are classified as follows:

1, threaded connection

2, key, hook, spline and pin connection

3. Interference connection

4, welding, bonding, riveting connection

According to the possibility of disassembly:

1, detachable connection. Such as threaded connection, spline connection and hook connection.

2. Non-detachable connection. Such as riveted connections and welded connections.

Classification by lock:

1, forcibly locking the connection. Such as interference connection.

2. Shape locking connection. Such as flower key connection, Ping Jian connection, cylindrical pin connection and reaming bolt connection.

3, material locking connection. Such as: brazing connection, adhesive connection, etc.