Clamping spline plum blossom elastic coupling polyurethane plastic is an elastic element, which has the advantages of cushioning, shock absorption, wear resistance, easy disassembly and assembly, and the working temperature is -35~+80 degrees.It can be interchanged with West German ROTEX coupling.The polyurethane elastomer is limited by the convex claw block, which can avoid internal deformation caused by impact and external deformation caused by centrifugal force; the large concave surface of the convex claw makes the surface pressure on the involute tooth very small, even if the tooth is overloaded , The teeth will not wear or deform.