In product design, the motion smoothness and reliability of reciprocating mechanisms directly affect the motion and dynamic performance of the mechanism and the product quality. From the perspective of dynamics and kinematics, this paper conducts a reliability study based on motion smoothness for the widely used crank slider mechanism. By establishing an equivalent mechanical model of the crank slider mechanism, the center of mass balance method is used to reduce the vibration source, and Matlab software is used for programming calculation and simulation to obtain the motion smoothness law of the actuator; then the influence of the dimensional error of the mechanism and the clearance error of the kinematic pair on the motion reliability of the mechanism is comprehensively considered, and the relevant motion parameters are determined and optimized according to the actual situation of the mechanical product, so as to obtain the best motion smooth reliability structure of the mechanism.
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