The motion equations of the flexible linking system that is excited by shock moment are established and the torsional shock response of the system is studied.

Grazing dis continuities in the poincare map of the vibratory system with a gap are likely to be a major cause of the unusual routes to chaos for the system.

The conveyor has the advantages of a large loading capacity, a small impulse inertia moment of force. It can be used for the cases of frequent starts and back rotation.