Coup-link

The coupling is a part that is used to connect two shafts. Normally, couplings do not cut the connection during operation of the shafts, except for torque limiting couplings, which are designed to cut off the connection if the torque passes through the permissible limit.
The use of couplings is more likely to eliminate the shaft's inconsistency or to create mechanical flexibility and also to connect the drive and axle sections.