Research On Transmission Structure Of The Globoidal Cam Planetary Mechanism

The globoidal cam planetary mechanism is used for mechanical transmission and has obvious advantages such as large transmission ratio,high efficiency,low noise,and compact structure.It has broad application prospects as a reducer mechanism.However,the problem of difficult machining of the outer ring cam of the globoidal cam planetary mechanism has affected the application of the mechanism.In response to this problem,our research team proposed a squirrel-cage globoidal cam planetary mechanism.In this paper,the new mechanism is combined with theory and simulation analysis to optimize the design of the main parameters of the new mechanism,for the purpose of exploring a more accurate modeling method,the mechanism and meshing theory of the mechanism,parameter optimization and modeling process are studied,The change of stress value of each component under different parameter combinations is analyzed.Through the analysis of the basic principles and degrees of freedom of the transmission of the globoidal cam planetary mechanism,on the basis of ensuring the original transmission mode of the cam planetary mechanism,a squirrel cage structure of the outer ring cam of the cam surface cam mechanism is proposed.Discretization of the integrated structure is realized,the structure of the outer torus cam is improved,and the problem of difficulty in processing and assembling the original structure of the outer torus cam is improved.Mechanism analysis of squirrel-cage globoidal cam planetary mechanism.The gear ratio of the globoidal cam planetary mechanism is deduced,and the relationship between the number and number of teeth of the planetary gear of the mechanism and the tooth number of the central globoidal cam and the outer ring cam and the spiral angle of rise is analyzed when the mechanism continuity of the mechanism is satisfied It is assembled and properly meshed to achieve the intended transmission.The tooth surface equations of the planetary gear teeth,the meshing equations of the planetary gear with the central globoidal surface cam and the outer toroidal cam,and the instantaneous contact line equations when the planetary gears mesh with the globoidal surface cam are deduced.The structure optimization design of the squirrel-cage globoidal cam planetary mechanism is carried out.According to the characteristics of design variables and constraints,an appropriate optimization method is selected,and the constrained optimization problem is transformed into an unconstrained optimization problem to find the optimal solution.Taking a set of actual parameters as an example,the feasibility of the optimization method and objective function selected for optimization was verified,and the influence of optimization results on the mechanism volume was analyzed.The parameters of the mechanism are optimized to reduce the weight of the squirrel-cage globoidal cam surface planetary mechanism.The three-dimensional modeling method of the squirrel-cage globoidal cam planetary mechanism was improved and improved.The three-dimensional model of the mechanism established by the simulated motion method has high accuracy and is easy to operate.The squirrel-cage globoidal cam planetary mechanism is verified through kinematic simulation Feasibility.The finite element structure analysis of the globoidal cam planetary mechanism.Use ANSYS to analyze the stress of the mechanism with different planetary gear number and planetary gear number combination method under the same size,and compare the three mechanisms based on the factors such as the number of meshing points,the complexity of the mechanism and the weight.Provide the basis.The fatigue life of the squirrel-cage globoidal cam planetary mechanism was analyzed to verify the safety of the mechanism.