The Solution Of The Rotary Transplanting Mechanism Based On Multi-function Segmented Transmission Ratio Hypothesize

Rotary planetary mechanism is the execution component of high-speed transplanter, whose non-circular gear transmission ratio decided the motion trajectory of seeding needles. This paper propose a method that can solve transmission ratio of non-circular gear transplanting mechanism and design transplanting mechanism according to the optimum trajectory of seeding needle.According to the rice transplanting agronomic requirements and work characteristics of the transplaning mechanism, choose one transplanting performance excellent trajectory of seeding needle as the optimum seeding needle, solve the non-circular gear transplanting mechanism’s total gear ratio, then use this paper studied multi-function segment transmission ratio hypothesize method to calculated the solar wheel, planet gear and the middle gear. Manufacture the prototype,through the virtual simulation of prototype and field test has proofed that the method this paper studied is proper. The main research work and result of this paper are as follows:1) Reviewed the research status and development of domestic and overseas rotary planetary mechanism. Major problems of high-speed rice transplanter are analysis. Working principle and characteristics of various non-circular gear rotary transplanting mechanism are studied. Establish kinematics model of the planetary mechanism of non-circular gears, and the organization’s kinematics analysis.2) Utilize the numerical calculation method to solve the total gear ratio of the rotary planetary mechanism and present the design idea that distribution the transmission ratio after fitted to the total transmission ratio. Using this paper present the linear function and trigonometric function for multi function is assumed to solve non circular gears of the transmission ratio, generating non circular gear, established a rotary type transplanting mechanism of 3D model. Through the ADAMS virtual prototype simulation verify the difference between solutions of rotary in seedling mechanism needle static trajectory and the ideal of a seedling needle static trajectory is very small and can meet the planting requirements.3) Owing to the seedling needle static path solution rotary transplanting mechanism of the calculation process is complex, development transplanting mechanism of human-computer interaction support optimization analysis software, calculate the in mechanism for real-timestatic trajectory and trajectory simulation analysis and optimization. At the same time, with the help of the software of non-circular gear tooth profile generation window, can quickly generate non circular gear tooth profile and improve the computational efficiency.4) A experimental prototype is fabricated by field transplanting test, verified the method which according to the seedling needle static path solution of rotary type transplanting mechanism design method is correct.