| The main edible vegetable oil in our country, including rapeseed oil accounted for more than 50%,high demand, our country needs to import more than 30% of the total consumption each year. Rape rapeseed oil accounted for proportion of total rapeseed oil and rape planting area is rising year by year in recent years, increased from 7.1433 million hectares in 2002 to 2010, 7.3 million hectares, the planting area of our country the highest in the world. Because of planting technology is relatively backward, yield is always not as good as Europe and the United States and other developed countries, improve the rape production capacity and production, guarantee domestic demand, has become an important goal in our country. In recent years, the high-speed development of our country, the urbanization process is accelerating, most young people choose to work in city, the rural population aging serious, the labor was reduced, thus improve the rape planting mechanization is very important.Divided into live and transplanting rape planting way, live is laborious and time-consuming,it has gradually been abandoned. Based on the existing filed in transplanting machine and the rice seedling transplanting machine domestic and overseas,combination rape transplanting agronomic,independently developed a set of non-circular gear planetary gear train automatic rape seedling transplanting machine. Through the modern design method to establish the mathematical model and kinematics model, According to the characteristics of the rape transplanting trail,Based on innovative optimization platform, Self-developed optimization software, Application of computer aided technology CAD series software for structure design of institutions、Virtual simulation and analysis,The specific process is as follows。(1) Analyzes the existing situation in transplanting machine working principle and development situation at home and abroad, combined with the characteristics of rape transplanting, offered to non-circular gear transmission to realize "chick" type transplanting trail, and establish the mathematical model for the analysis of gear pitch curve and transmission characteristics of gears in the process of the movement and posture and position, and eventually gain parameter equation, As to provide theoretical basis for subsequent optimization software development and institutions(2) Based on the established mathematical model, the independent development of transplanting optimization software, and introduces the software interface, function, characteristics and implementation process; Application of the software to optimize the transplanting machine and introduce the “cycloid” non-circular gear generation process.(3) According to the established mathematical model, combining with the rape agronomic requirements, seting kinematics optimization goals, in Visual Basic6.0 Visual programming software, the application of independent development of the cycloid non-circular gear planetary gear train rape pot transplanting machine optimization software, in the form of human-computer interaction, Optimize the accord with rape transplanting transplanting trail(4)Introduce the“ cycloid” non-circular gear planetary gear train rape pot transplanting machine structure composition and the working principle, Analyzed some main parameters effect on the attitude of the transplanting trail; Under the self-developed optimization software, Analysising between seedling pieces when transplanting machine is running point of velocity and acceleration curve.(5) According to optimization of structure parameter, Auto CAD2010 was applied for structure design and determine transplanting machine initial position, and draw the whole assembly drawing and part drawing; Transplanting machine parts to make use of UG8.0 three-dimensional modeling, virtual prototype assembly, after the interference check and correct for subsequent work(6) Using the data exchange between UG and Adams, Import virtual prototype into Adams, According to the principle of transplanting machine movement, adding constraints and kinematic pair, virtual prototype simulation movement, Get relative transplanting trail and absolute transplanting trail, Contrast with theoretical trail, are basically identical; Under the Adams post-processing module, Watch the transplanting machine running animation, If found unreasonable to structure design until the structure is correct, and analysis between seedling pieces cusps of Speed curve, Compared with theoretical curve, posture and position highly consistent,Mechanism design is correct, verifying the rationality of institution. |
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