Abstract:

To solve these problems of larger diameter, upright position, and film damage, a mechanism with planetary five-bar is proposed based on the theory of zero-speed transplanting. According to the movement characteristics of zero-speed transplanting, the mechanism movement trajectory is analyzed and presented kinematics model. A computer-aided analysis program based on Visual Basic 6.0 is developed for optimizing the structural parameters as well as optimized to satisfy the motion trajectory conditions by human-computer interaction analysis method. The image shows that the static trajectory tallies with its computer simulation. During the field test with the forward speed of 0.5m/s and transplanting frequency of 50 seedlings per minute, note that the advantages of the seedling transplanting mechanism are that the diameter of the planting cave is less than 70 millimeter, 96.7% of the seedling perpendicularity qualification rate can be reached, the film injury rate is only 3.2%, the missing rate of seedling transplanting is merely 3%, and the hanging membrane phenomenon is avoided. The mechanism achieves requirement for a mulch-film transplanting machine.

Key words: cylindrical cam, effective zero-speed transplanting, experimental validation, kinematic, parameter optimization, seedling transplanting on mulch-film