Couplings belong to the category of general mechanical parts and are used to connect two shafts (active shaft and driven shaft) in different mechanisms to make them rotate together to transmit torque. In high-speed and heavy-load power transmission, some couplings also have the function of buffering, damping and improving the dynamic performance of the shafting. The coupling is composed of two halves, which are respectively connected with the driving shaft and the driven shaft.
The general power machine is mostly connected with the working machine by means of a coupling, which is the most commonly used coupling component for shaft transmission of mechanical products. In the late 20th century, coupling products at home and abroad developed rapidly. In product design, how to choose a coupling that can meet the requirements of the machine from a variety of couplings with different performances? For most designers, It is always a troublesome problem. Commonly used couplings include diaphragm couplings, drum gear couplings, universal couplings, safety couplings, elastic couplings and serpentine spring couplings.