Variable-size and variable-amount topdressing device

A variable-size and variable-amount topdressing device, comprising

• a main frame (19);
• an image recognition unit, wherein the image recognition unit is arranged at a traveling end of the main frame (19);
• a variable-amount fertilizer applying portion, wherein the variable-amount fertilizer applying portion is arranged above the main frame (19) and the variable-amount fertilizer applying portion is used for controlling fertilizer applying amounts of multiple fertilizers;
• two electric push rods (20), wherein the two electric push rods (20) are vertically and fixedly connected to inner opposite surfaces of the main frame (19) respectively;
• a variable-size fertilizer applying portion, wherein the variable-size fertilizer applying portion is arranged at an output end of the variable-amount fertilizer applying portion, a height of the variable-size fertilizer applying portion is adjusted by the two electric push rods (20), an output end of the variable-size fertilizer applying portion is arranged corresponding to the output end of the variable-amount fertilizer applying portion, and the variable-size fertilizer applying portion is used for adjusting a fertilizer applying range;
• the variable-amount fertilizer applying portion, the variable-size fertilizer applying portion and the two electric push rods (20) are electrically connected to the image recognition unit;
• the variable-amount fertilizer applying portion comprises a fertilizer box (9), wherein several fertilizer cavities are provided in the fertilizer box (9), output ends of the several fertilizer cavities are vertically and slidably connected to variable-amount fertilizer discharge control plates (17), bottom ends of several variable-amount fertilizer discharge control plates (17) are arranged corresponding to fertilizer discharge openings (14) of the several fertilizer cavities, a top of the fertilizer box (9) is provided with several first driving units for driving the several variable-amount fertilizer discharge control plates (17) to rise and fall respectively, several fertilizer discharge openings (14) are in communication with input ends of several fertilizer discharge pipes (11), output ends of the several fertilizer discharge pipes (11) are arranged corresponding to the variable-size fertilizer applying portion, and the several first driving units are electrically connected to the image recognition unit;
• the variable-size fertilizer applying portion comprises a fertilizer distributor connecting frame (5), a fertilizer distributor linkage rod (6) vertically penetrates a middle end of the fertilizer distributor connecting frame (5), a second driving unit for driving the fertilizer distributor linkage rod (6) to rise and fall is arranged above the fertilizer distributor connecting frame (5), a variable fertilizer distribution unit is arranged between a bottom end of the fertilizer distributor linkage rod (6) and a bottom surface of the fertilizer distributor connecting frame (5), the second driving unit adjusts an opening degree of the variable fertilizer distribution unit by the fertilizer distributor linkage rod (6), an upper part of the variable fertilizer distribution unit is arranged corresponding to the output ends of the several fertilizer discharge pipes (11), and the second driving unit is electrically connected to the image recognition unit;
• fixed ends of the electric push rods (20) are fixedly connected to an inner side wall of the main frame (19), and telescopic ends of the electric push rods (20) are fixedly connected to top surfaces of two ends of the fertilizer distributor connecting frame (5);
• and
• the variable fertilizer distribution unit comprises several variable-size fertilizer distributor umbrella type units (8) and several fertilizer distributor supporting rods (7), top ends of the several variable-size fertilizer distributor umbrella type units (8) are circumferentially hinged at a center of the bottom surface of the fertilizer distributor connecting frame (5) at equal intervals, one ends of the several fertilizer distributor supporting rods (7) are circumferentially hinged at a bottom end of the fertilizer distributor linkage rod (6) at equal intervals, the other ends of the several fertilizer distributor supporting rods (7) are correspondingly hinged on inner side walls of the several variable-size fertilizer distributor umbrella type units (8), the fertilizer divider linkage rod (6) is positioned among the several variable-size fertilizer distributor umbrella type units (8), and upper parts of the several variable-size fertilizer distributor umbrella type units (8) are arranged corresponding to the output ends of the several fertilizer discharge pipes (11).