Optimization Method And Polygon-like Analysis And Application Research Of Non-circular Three Wheeled Synchronous Belt Transmission

With the development of society and the progress of science and technology,in order to meet the requirements of different working environments,most of them need non-uniform transmission to achieve specific movement laws.For example,the paper feeding mechanism of high-speed printing press often adopts non-uniform transmission to ensure the printing quality.For example,press,gear shaper and so on,often use variable ratio transmission mechanism to improve working efficiency and motion characteristics,but the existing non-uniform transmission mechanism don’t have both the characteristics of stable transmission and reliability and large center distance.Based on the above situation,this paper presents an optimum design method of non-circular tensioner for non-circular three-wheel synchronous belt transmission mechanism,namely automatic optimization algorithm(path diameter method)to solve the optimal non-circular tensioner pitch curve,and presents a concave-convex judgment method for non-circular tensioner pitch curve(vector ipsilateral method)and the non-circular synchronous belt drive "polygon effect" numerical method,also designs the non-circular three-wheel synchronous belt transmission mechanism to test analysis.and built for experimental analysis.A non-uniform double crank fivebar planting mechanism driven by non-circular three-wheel synchronous belt is proposed and its kinematics is analyzed.The main contents of this paper are as follows:1)In view of the complexity of current methods for judging the concave and convex of noncircular tension wheel pitch curves,a method for judging the concave and convex of non-circular tension wheel pitch curves(vector ipsilateral method)is proposed,and the advantages and disadvantages of this method and the existing concave and convex judgment method(differential geometry method)are quantitatively compared and analyzed.2)In order to solve the non-circular tension knuckle curve corresponding to the minimum theoretical relaxation at one time,according to the law of transmission ratio(continuous or discrete)of a given master-slave wheel,an automatic optimization algorithm(path diameter method)is proposed to iteratively find the optimal non-circular tension knuckle curve,and an example is given to prove the convergence of the automatic optimization algorithm’s rationality and wide applicability.3)Based on the influence of polygon-like effect on the transmission ratio of non-circular synchronous belt transmission,a mathematical model of polygon-like effect is established by numerical method,and the influence of relevant parameters on polygon-like effect is quantitatively analyzed by calculating examples.4)According to the influence of the relevant parameters of non-circular synchronous belt drive on its polygon-like effect,Creo is used to design the mechanism scheme of the non-circular threewheel synchronous belt drive mechanism test-bed,and the assembly and test are carried out.The results of test data collection and theoretical calculation are compared and analyzed to verify the non-circular three-wheel drive mechanism proposed in this paper.Rationality and correctness of optimization method for synchronous belt drive.5)In order to further optimize the trajectory and posture of the current uniform double crank five-bar planting mechanism,a non-circular three-wheel synchronous belt-driven non-uniform double crank five-bar planting mechanism is proposed,and its kinematics analysis is carried out.The relevant parameters are optimized and compared with the uniform double crank five-bar planting mechanism,which improves the original double crank five-bar planting mechanism.The trajectory and attitude of the rod planting mechanism prove the superiority of the non-uniform double crank five-bar planting mechanism and the application prospect of the non-circular threewheel synchronous belt drive mechanism.