Theoretical Analysis And Optimal Design Of Automatic Vegetable Transplanter

Transplanting is an important process of vegetable procreating, which has the function of compensating varying climate and shifting the procreating of plants to an earlier time. It helps the plants to use the source of light and temperature sufficiently, which will make considerable economical and social benefits. At present, domestic research and development of transplanting machine is on the level of copying. Significant improvement and technological penetration of abroad transplanting machines has not been done yet. The transplanting machines from overseas are complicated in structure and rich in price, it's difficult to popularize in domestic. So it's a pressing requirement to design a new kind of transplanting machine.This paper concludes the merits and demerits of several kinds of transplanting machines from both domestic and abroad. Based on the achieved research result, a novel automatic vegetable pot seedling transplanting mechanism with planetary elliptic gear train has been designed. This mechanism can be used as seedling fetching mechanism lonely to realize fetching seedlings automatically. Besides, if the mechanism parameters of this mechanism have been optimized properly, the motion of fetching seedlings and transplanting seedlings can both be realized by this mechanism. This automatic vegetable pot seedling transplanting mechanism has simple structure and reliable performance. The inventive patent (201010104378.8) and patent for utility model (201020105717.X) is disclosed. The main content of this paper is listed as bellow:1. According to the technological characteristics and agricultural requirements, imitate the requirements of trajectory, motion and attitude of manual transplanting, invent the automatic vegetable pot seedling transplanting mechanism, which can satisfy the special working trajectory requirements of fetching and transplanting seedlings automatically. This novel vegetable transplanting mechanism has higher working efficiency, steadier transmission and less vibration than existing mechanism.2. The working principle and structural features of this automatic vegetable pot seedling transplanting mechanism has been discussed and the kinematic mathematical model of this mechanism has been established.3. Based on the established kinematic mathematical model and Visual Basic 6.0, develop the kinematic aided analytical and optimal software of this automatic vegetable pot seedling transplanting mechanism (Register Number: 2010R11S001084). Introduce the human-computer interactive interface and functions of this software. By this software, the difficulty of optimization with multiple kinematic objects of this mechanism can be solved.4. According to the agricultural requirements in our country, put forward the parametric optimal objects and methods of the automatic vegetable pot seedling transplanting mechanism. Analyze the influence of parameter vitiation on kinematic characteristics of this transplanting mechanism. Take advantage of the developed software, use the optimization method of human-computer interactive, and obtain the structural parameters which can satisfy the working requirements of automatic vegetable pot seedling transplanting.5. In accordance with the obtained structural parameters, design the ensemble of the automatic vegetable pot seedling transplanting mechanism; discuss the problems which should be noticed in the process of designing. Finally finish the design of parts and the assembly drawing basing on AutoCAD2004.6. Establish the solid model of all parts of this mechanism in UG and then carry out the virtual assemble. Use ADAMS to conduct dynamic simulation of this mechanism.7. The research of test-bed. Manufacture a prototype of the automatic vegetable pot seedling transplanting mechanism, meanwhile design the test-bed. Measure the kinematic characteristics of this mechanism on the test-bed, prove the reliability in engineering application of this novel transplanting mechanism.