The transmission system in the spring operating mechanism is the key part to transmit force and motion

and the deviation of the motion trajectory from the design position will greatly affect the motion characteristics of the mechanism. In view of the flywheel disk offset fault which is found in the mechanical endurance test of a clamping plate spring operating mechanism in this paper

the rigid body kinematics model is set up by RecurDyn and its mechanical characteristics of closing and opening process are analyzed. The experimental platform of mechanical characteristics is set up

and the obtained experimental results are compared with the simulation results

which verifies the accuracy of the simulation. By changing the angle of flywheel disc

the variation of mechanical characteristics with different deviation degrees is analyzed. The results show that the deviation of flywheel disc will lead to faster closing speed and shorter closing time

and even lead to the failure of closing lock system

thus leading to direct closing after the charging. The work done in this paper provides a theoretical basis for the comparison between the subsequent structural improvement and various parameter schemes

thus shortening the research and development cycle and design guidance.