Studies On The Strength Theory Of Eccentric Wheel Pushrod Planetary Transmission

The eccentric wheel pushrod planetary transmission belongs to the active tooth transmission with a few difference of teeth. Which pushrod frame has succeeded in solving the problems about the input shaft and the output shaft in the same axis. It avoids the parallelogrammical output machine with a complicated planetary wheel system and the flexible wheel of resonance wave transmission, shortens the movement chain observably and reduces the loss of movement transfer. It has many advantages, such as strong load-carrying capacity, high transmission efficiency, large angular velocity ratio, small in size and structure, etc. All of these characteristics make the eccentric wheel pushrod planetary transmission have wide application prospects on industry.The modern design methods, such as the theory of fuzzy reliability, the finite element method and the optical design, are introduced to study the theory of the eccentric wheel pushrod planetary transmission systematically. This dissertation includes the following five aspects. Firstly, the research of kinematics and transmission efficiency; Secondly, the research of dynamic model; Thirdly, the research of strength and strength of fuzzy reliability; Fourthly, the research of engaging stiffness; Lastly, the research of optimal design of parameter.The efficiency of eccentric wheel pushrod planetary transmission is studied by the method of engaging power. The kinematics and force analyses of the transmission are given. The method to calculate the efficiency is proposed and the corresponding formulae for evaluating the efficiency are derived.According to the method for force analysis of statically indeterminate structure and that of common planar mechanisms, the structural deformation coordination equations, which are based on the microdisplacement of movable pushrod, are put forward. Meanwhile, the dynamic model of eccentric wheel pushrod planetary transmission is well established and the method for solving the model is given.The force analysis of eccentric wheel pushrod planetary transmission is investigated. The calculation formulae of stress and strength for various main parts are derived by applying the Hertz stress theory of the stretch mechanics. The theory of fuzzy reliability is applied to study the strength design of eccentric wheel pushrod planetary transmission, the randomness of working Stress and the fuzziness of allowable stress are discussed. And the corresponding formulae of calculating the...