Abstract:In order to improve the working efficiency and reliability of the flexible plate spring in the operation of linear oscillation motor,an eccentric involute flexible plate spring was designed,and its radial stiffness and axial stiffness,fatigue strength and natural frequency were studied.Combined with the stiffness analysis model of variable stiffness coil spring with waist drum type,the stiffness analysis model of the leaf spring was established,and its stiffness was approximately constant in a certain range.The finite element software was used to analyze the stiffness of the leaf spring with different eccentricity,thickness,end angle of involute and phase difference,and the optimization scheme of the leaf spring was obtained.The stiffness,fatigue strength and natural frequency of the optimized scheme were analyzed and verified by relevant tests.The results show that:compared with the experimental data,the stiffness of the leaf spring is approximately constant in a certain range;the stiffness of the leaf spring is affected by the thickness most and the eccentricity is the least;the stiffness of the optimized structure can be effectively improved.The whole design process of the leaf spring meets the requirements of the performance design of the leaf spring,which can better characterize the performance characteristics of the leaf spring.