The polyurethane elastomer is restricted by the convex claw block,which can avoid the internal deformation caused by the impact and the external deformation caused by the centrifugal force;A large concave surface that reduces the surface pressure on the involute teeth;It has the compensation of two axis relative offset, buffer, shock absorption and wear resistance;It is suitable for the transmission shafting of the two coaxial line, which is widely used in the situati.

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