According to the relative position of the two shafts being connected, the coupling can be divided into two types: rigid coupling and flexible coupling. Rigid couplings are used where the two shafts are strictly aligned and do not occur relatively uniquely during work. The flexible coupling is used where the two shafts can have relative displacement.
Rigid couplings do not have the ability to buffer and compensate for the relative displacement of the two axes, and require strict alignment of the two axes. However, this type of coupling has simple structure, low manufacturing cost, and convenient assembly and disassembly.
Flexible couplings can be divided into flexible couplings without elastic elements and flexible couplings with elastic elements. The former type only has the ability to compensate for the relative displacement of the two axes, but cannot cushion the shock; the latter type is due to Containing elastic elements, in addition to the ability to compensate the relative displacement of the two axes, it also has buffering and damping effects, but the transmitted torque is limited by the strength of the elastic element.
Commonly used couplings are gear couplings, drum gear couplings, plum couplings, slider couplings, universal couplings, safety couplings, diaphragm couplings, and elastic couplings And serpentine spring coupling. It is best to select the appropriate coupling according to the specific situation, and, like this common component with high frequency, use good quality.