t is a rubber part used to connect two shafts or a shaft with rotating parts in a mechanical transmission shaft system. It plays the role of transmitting motion and power, and has the function of compensating the relative displacement of two axes and cushioning and shock absorption. Its function is to attenuate the torsional vibration of the transmission shaft system, unlike other damping products that mainly attenuate the linear vibration of the machine. According to the force, rubber elastic coupling can be divided into compression type and shear type. According to the structural use, the former has rubber sleeve pin couplings, rubber plate couplings, plum blossom elastic couplings, universal elastic couplings and air spring couplings; the latter has rubber metal ring couplings. Couplings, tire couplings and U-shaped rubber couplings. This type of product has small modulus, large elastic deformation, can withstand loads in different directions, and has small damping. They are widely used in vehicles, ships and various machinery. Excellent shock absorption performance, reduce mechanical noise. The rubber portion of the elastomer consists of polygonal rubber with vertices filled with aluminum, each firmly vulcanized and bonded together. The rubber body is respectively connected with the cylinder liner and the flange bushing with bolts, and the transmission is carried out through the rubber body. In particular, the radial bolt connection is the connection between the pre-deformed colloid and the cylinder liner. It is a pre-tightened structure with good flexibility and can transmit vibration and shock well.