Agricultural planting precision fertilizer applicator

Abstract

The application discloses an agricultural planting precision fertilizer applicator, which comprises a fertilizer applicator body, a spraying assembly is arranged at the front end of the fertilizer applicator body, a mixing box is arranged at the end of the fertilizer applicator body away from the spraying assembly, a feeding opening is arranged at the top of the mixing box, a filter plate is arranged in the mixing box, a grinding assembly is arranged at the top of the filter plate, the grinding assembly is slidably connected with the inner wall of the mixing box, a mixing assembly is arranged in the center of the mixing box, the filter plate is slidably connected with the mixing assembly, when the mixing assembly rotates, the mixing assembly drives the filter plate to rotate, and the filter plate drives the grinding assembly to rotate when rotating; through cooperation of the mixing box, the grinding assembly and the stirring assembly, the fertilizer added into the mixing box falls on the filter plate, so that the problems that the granular fertilizer or the fertilizer with lumps falls rapidly at the bottom position in the mixing box and possibly blocks the bottom outlet of the mixing box are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural planting equipment, and particularly relates to an agricultural planting precision fertilizer applicator. BACKGROUND

[0002] The agricultural planting precision fertilizer applicator is an advanced agricultural equipment, which can improve the utilization rate of fertilizer, reduce waste, and thus improve crop yield and quality. When the fertilizer applicator is used for fertilizing crops, various required liquid fertilizers and solid fertilizers need to be added into a mixing box in a specific proportion in advance for water mixing, and then sprayed through a spray head.

[0003] Chinese Patent Publication No. CN115104419B discloses an agricultural planting fertilizer spraying device, which comprises a connecting box body, a control panel is connected to the side wall of the connecting box body, a diesel generator is connected to the other side wall of the connecting box body, water pumps are symmetrically arranged on the end face of the connecting box body, stirring structures are symmetrically arranged in the inner cavity of the connecting box body, a lifting structure is arranged at the bottom of the connecting box body, and a driving structure is connected to the bottom of the lifting structure.

[0004] During the process of adding various required liquid fertilizers and solid fertilizers into the mixing box for mixing, the added fertilizers may have a caking phenomenon. The caked fertilizers not only dissolve slowly after being added into the mixing box, but also quickly precipitate to the bottom of the mixing box, which may block the output port of the mixing box and affect the subsequent overall use.

[0005] Therefore, it is necessary to provide an agricultural planting precision fertilizer applicator to solve the above technical problems. SUMMARY

[0006] The present application aims to provide an agricultural planting precision fertilizer applicator to solve the problem that the caked fertilizers not only dissolve slowly after being added into the mixing box, but also quickly precipitate to the bottom of the mixing box, which may block the output port of the mixing box.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an agricultural planting precision fertilizer applicator, comprising a fertilizer applicator body; a spraying assembly is installed at the front end of the fertilizer applicator body, a mixing box is installed at the end of the fertilizer applicator body away from the spraying assembly, a feeding port is arranged at the top of the mixing box, a filter plate is arranged in the mixing box, a grinding assembly is arranged at the top of the filter plate, the grinding assembly is in sliding connection with the inner wall of the mixing box, a mixing assembly is arranged in the center of the mixing box, the filter plate is in sliding connection with the mixing assembly, when the mixing assembly rotates, the mixing assembly drives the filter plate to rotate, and the filter plate drives the grinding assembly to rotate when rotating.

[0008] As a further solution of the present invention: the grinding assembly includes a grinding roller; the end of the grinding roller close to the inner wall of the mixing box is fixedly connected to a connecting shaft, the end of the connecting shaft away from the grinding roller is rotatably connected to a slider, the periphery of the connecting shaft is fixedly connected to a transmission wheel, and the bottom of the transmission wheel is slidably fitted with the top of the filter plate.

[0009] As a further solution of the present invention: the outer periphery of the connecting shaft is rotatably connected to a fixed plate, the bottom of the fixed plate is fixedly connected to an annular plate, and the top of the filter plate is provided with an annular groove slidably connected to the bottom end of the annular plate.

[0010] As a further solution of the present invention: the inner wall of the mixing box is provided with a reciprocating thread groove, and the outer edge side wall of the filter plate is fixedly provided with a protrusion that is slidably adapted to the reciprocating thread groove.

[0011] As a further solution of the present invention: the side wall of the mixing box is provided with a chute, the chute is vertically arranged on the inner wall of the mixing box, and the slider is slidably connected to the chute.

[0012] As a further solution of the present invention: the mixing assembly includes a transmission shaft; the transmission shaft is arranged at the center of the mixing box and the filter plate, and the transmission shaft and the filter plate are slidingly connected, the top transmission of the transmission shaft is provided with a motor, and the motor is fixedly installed at the top center of the mixing box, the periphery of the transmission shaft is symmetrically provided with mixing plates along the center, and multiple groups of mixing plates are arranged in an array along the vertical direction on the transmission shaft, and the filter plate is slidingly connected to the transmission shaft.

[0013] As a further solution of the present invention: a mounting groove is provided on the transmission shaft, a first connecting plate is slidably connected in the mounting groove, a square block is provided at one end of the mixing plate close to the transmission shaft, the end of the square block away from the mixing plate is fixedly connected to the end of the first connecting plate, the center of the filter plate is fixedly connected to a second connecting plate that is slidably adapted to the mounting groove, and a spring is provided between the two adjacent groups of first connecting plates.

[0014] As a further solution of the present invention: the end of the mixing plate close to the square block is fixedly connected to a fixed shaft, the end of the fixed shaft away from the mixing plate is rotatably connected to the square block, the side wall of the square block is elastically connected to a limit frame, and the top of the limit frame slides and protrudes from the top of the square block.

[0015] As a further solution of the present invention: the limit frame is a "concave" structure, and the fixed shaft sleeve is arranged on the periphery of the fixed shaft, a plurality of groups of limit holes are arranged in a circular array on the fixed shaft, and the limit holes are arranged at positions corresponding to the limit frame, and a limit column is fixedly provided on the limit column which is slidably adapted to the limit hole, and the limit column is arranged directly below the fixed shaft.

[0016] As a further solution of the present invention: first inclined surfaces are provided on both sides of the mixing plate, and second inclined surfaces are provided on the upper and lower ends of the mixing plate.

[0017] Compared with the prior art, the beneficial effect of the present invention is that through the coordinated use of the mixing box, the grinding assembly and the stirring assembly, the fertilizer added to the mixing box will fall on the filter plate, thereby avoiding the problem that granular fertilizer or agglomerated fertilizer quickly falls to the bottom of the mixing box and may block the output port at the bottom of the mixing box. Then, the mixing assembly is started, and the mixing assembly rotates to mix the various fertilizers in the mixing box. When the mixing assembly rotates, the filter plate is driven to rotate, so that the fertilizer on the filter plate is evenly spread. Then, the grinding assembly rotates when the filter plate rotates, and the rotating grinding assembly cooperates with the fertilizer on the filter plate that rotates with the mixing assembly to grind and crush, avoiding the existence of some agglomerated fertilizers on the filter plate that cannot be dissolved in time, and ensuring the normal mixing ratio of the fertilizing liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the mixing box in the present invention.

[0020] Figure 3 Schematic diagram of the structure of the grinding assembly in the present invention.

[0021] Figure 4 It is a structural schematic diagram of the reciprocating thread groove in the present invention.

[0022] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle.

[0023] Figure 6 It is a structural schematic diagram of the convex column in the present invention.

[0024] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point B.

[0025] Figure 8 It is a structural schematic diagram of a cross-section of the middle portion of the transmission shaft in the present invention.

[0026] Figure 9 It is a structural schematic diagram of the limit frame and square block in the present invention.

[0027] Figure 10 It is a structural schematic diagram of the limiting column and the limiting hole in the present invention.

[0028] In the figure: 1. Fertilizer spreader body; 2. Spray assembly; 3. Mixing box; 4. Motor; 5. Feeding port; 6. Filter plate; 7. Drive shaft; 8. Grinding roller; 9. Drive wheel; 10. Annular plate; 11. Reciprocating thread groove; 12. Slide; 13. Mixing plate; 14. Slider; 15. Boss; 16. Fixed plate; 17. Annular groove; 18. Mounting groove; 19. Square block; 20. Limiting hole; 21. Limiting frame; 22. First connecting plate; 23. Fixed shaft; 24. Limiting column. DETAILED DESCRIPTION

[0029] See also Figures 1-10 In an embodiment of the present invention, a precision fertilizer applicator for agricultural planting includes a fertilizer applicator body 1, a spray assembly 2 is installed at the front end of the fertilizer applicator body 1, a mixing box 3 is installed at the end of the fertilizer applicator body 1 away from the spray assembly 2, a feeding port 5 is provided on the top of the mixing box 3, a filter plate 6 is provided in the mixing box 3, a grinding assembly is provided on the top of the filter plate 6, the grinding assembly is slidably connected to the inner wall of the mixing box 3, a mixing assembly is provided in the center of the mixing box 3, the filter plate 6 is slidably connected to the mixing assembly, when the mixing assembly rotates, the mixing assembly drives the filter plate 6 to rotate, and when the filter plate 6 rotates, it drives the grinding assembly to rotate.

[0030] Preferably, the spray assembly 2 includes a fixed bracket and a spray rod, the fixed bracket is installed at the front end of the fertilizer machine body 1, the spray rod is installed on the fixed bracket, a nozzle is installed at the bottom of the spray rod, and the spray rod can be folded and retracted, and the forward direction of the fertilizer machine body 1 is the front end. The fertilizer machine body 1 is provided with a driving assembly for driving the spray assembly 2 to retract and fold, and a conveying assembly for transporting the fertilizer liquid for crops in the mixing box 3 to the spray rod and spraying it from the nozzle. The fertilizer machine body 1 and the conveying assembly and driving assembly thereon are all related components commonly used in the prior art for fertilizing crops. The detailed related structure and working principle will not be described in detail here.

[0031] During use, when it is necessary to fertilize crops in agricultural planting, the relevant liquid fertilizers and solid fertilizers are added into the mixing box 3 through the feeding port 5 respectively. Under the action of the filter plate 6, the fertilizers added into the mixing box 3 will fall on the filter plate 6, thereby avoiding the problem that the granular fertilizers or the agglomerated fertilizers quickly fall to the bottom of the mixing box 3, causing the problem that the output port at the bottom of the mixing box 3 may be blocked. Then, water of corresponding proportion is added. After the addition is completed, the mixing component is started, and the mixing component rotates to mix the various fertilizers in the mixing box 3. When the mixing component rotates, it drives the filter plate 6 to rotate, so that the fertilizers on the filter plate 6 are evenly spread. Then the filter plate 6 is During the rotation, the grinding assembly rotates on its own, and the rotating grinding assembly cooperates with the filter plate 6 that revolves around the mixing assembly to grind and crush the fertilizer thereon, thereby avoiding the presence of some lumps of fertilizer on the filter plate 6 that cannot be dissolved in time, ensuring the normal proportion and speed of the fertilizing liquid mixing, and at the same time avoiding the lumps of fertilizer directly falling on the bottom of the mixing box 3, and when fertilizer or water is added, impurities may be mixed in it, which may cause clogging of the nozzle after being transported to the spray rod by the conveying assembly. After the mixing is completed, the driving assembly is started to expand the spray assembly 2, and then the conveying assembly is started to transport the fertilizing liquid in the mixing box 3 and spray it out through the nozzle.

[0032] See also Figure 3-Figure 8, Preferably, the grinding assembly includes a grinding roller 8; one end of the grinding roller 8 close to the inner wall of the mixing box 3 is fixedly connected to a connecting shaft, and the end of the grinding roller 8 away from the connecting shaft is toward the center position of the filter plate 6, and the end of the connecting shaft away from the grinding roller 8 is rotatably connected to a slider 14, and the periphery of the connecting shaft is fixedly connected to a transmission wheel 9, and the bottom of the transmission wheel 9 slides in contact with the top of the filter plate 6, and the periphery of the connecting shaft is rotatably connected to a fixed plate 16, which is arranged between the transmission wheel 9 and the grinding roller 8, and the bottom of the fixed plate 16 is fixedly connected to an annular plate 10, and the top of the filter plate 6 is provided with an annular groove 17 that is slidably connected to the bottom end of the annular plate 10. When in use, the position of the grinding roller 8 is restricted by the action of the annular plate 10 and the fixed plate 16 and the cooperation of the slider 14, and the annular plate 10 completely blocks the annular groove 17 to avoid Fertilizer may fall into the annular groove 17 and affect the rotation of the annular plate 10, and the bottom of the transmission wheel 9 is tightly fitted with the top of the filter plate 6 near the inner wall of the mixing box 3. In this way, when the filter plate 6 rotates, the friction between the filter plate 6 and the transmission wheel 9 can make the filter plate 6 drive the transmission wheel 9 to rotate, and the rotation of the transmission wheel 9 drives the grinding roller 8 to rotate through the connecting shaft. The connecting shaft is restricted by the sliding connection between the slider 14 and the inner wall of the mixing box 3, so the grinding roller 8 is in a relatively fixed state, and the self-rotation of the filter plate 6 and the self-rotation of the transmission wheel 9 completes the grinding and crushing of the fertilizer on the top of the filter plate 6, avoiding the problem of fertilizer agglomeration and inability to dissolve in time affecting the mixing ratio, and the problem of slow dissolution of some granular fertilizers, so that the fertilizing liquid is mixed quickly and the efficiency is improved.

[0033] See also Figure 4-Figure 5Preferably, the inner wall of the mixing box 3 is provided with a reciprocating thread groove 11, and the outer edge side wall of the filter plate 6 is fixedly provided with a boss 15 that is slidably adapted to the reciprocating thread groove 11. There is a certain gap between the top height of the reciprocating thread groove 11 and the top of the inner wall of the filter plate 6, so as to facilitate the addition of fertilizer, and the bottom height of the reciprocating thread groove 11 is higher than the height of the mixing component. When in use, in the initial state, the filter plate 6 is at the top position of the reciprocating thread groove 11. When the mixing component rotates, the mixing component drives the filter plate 6 to rotate. At the same time, the grinding roller 8 continuously grinds the fertilizer on the filter plate 6. When the filter plate 6 rotates, through the action of the boss 15 and the guide restriction of the reciprocating thread groove 11, the filter plate 6 will first move to the bottom of the mixing box 3, thereby achieving the fertilizer on the filter plate 6 The material is in contact with and mixed with different layers of other liquids added to the mixing box 3 in time, avoiding the problem that when the filter plate 6 is relatively close to the top of the mixing box 3, some solid fertilizers need to fall slowly, resulting in a long mixing time, and the problem that the liquid concentration near the top of the mixing box 3 is higher than the liquid concentration at the bottom of the mixing box 3. When the filter plate 6 moves to the bottom end position of the reciprocating thread groove 11, the filter plate 6 will move upward and reset with the cooperation of the protruding column 15 and the reciprocating thread groove 11, and the upward movement of the filter plate 6 will accelerate the granular fertilizer on the filter plate 6 that is ground and crushed by the grinding roller 8 to pass through the filter plate 6, that is, the fertilizer particles on it are quickly moved downward through the filter plate 6 under the impact of the water flow, so the rapid and uniform mixing of various fertilizers is achieved by the up and down reciprocating movement of the filter plate 6.

[0034] The bottom end of the slide 12 is connected to the bottom end of the transmission shaft 7 by sliding.

[0035] See also Figure 1-Figure 2 、 Figure 4 - Figure 5 、 Figures 8-10Preferably, the mixing assembly comprises a transmission shaft 7; the transmission shaft 7 is arranged at the center of the mixing box 3 and the filter plate 6, and the transmission shaft 7 and the filter plate 6 are in sliding connection; the top of the transmission shaft 7 is provided with the motor 4, which is fixedly arranged at the top center of the mixing box 3; the periphery of the transmission shaft 7 is provided with the mixing plate 13 in a central symmetry, and the mixing plate 13 is arranged in multiple groups in the vertical direction on the transmission shaft 7; the filter plate 6 is in sliding connection with the transmission shaft 7; in use, when the fertilizing liquid needs to be mixed, the motor 4 is started, the motor 4 rotates to drive the transmission shaft 7 to rotate, and the transmission shaft 7 rotates to drive the mixing plate 13 to revolve around the transmission shaft 7, so as to realize the mixing work of the fertilizing liquid in the mixing box 3, and at the same time, the transmission shaft 7 rotates to drive the filter plate 6 to rotate.

[0036] Further, preferably, the transmission shaft 7 is provided with the mounting groove 18, the first connecting plate 22 is in sliding connection in the mounting groove 18, one end of the mixing plate 13 close to the transmission shaft 7 is provided with the square block 19, the end of the square block 19 away from the mixing plate 13 is fixedly connected with the end of the first connecting plate 22, the center of the filter plate 6 is fixedly connected with the second connecting plate in sliding connection with the mounting groove 18, the adjacent two groups of first connecting plates 22 are provided with the spring, and the bottom of the first connecting plate 22 and the bottom of the square block 19 are spaced apart, so that when multiple groups of square blocks 19 are attached, the space between the first connecting plate 22 and the square block 19 is used to accommodate the spring, when the mixing plate 13 is in a vertical state, the upper and lower ends of the mixing plate 13 are not higher than the upper and lower ends of the square block 19, so that when the filter plate 6 moves downward and is attached to the top of the square block 19, the top of the mixing plate 13 and the bottom of the filter plate 6 are spaced apart, and when multiple groups of square blocks 19 are attached, the adjacent two groups of mixing plates 13 are spaced apart.

[0037] When in use, in the initial state, the filter plate 6 is at the top position in the mixing box 3, and the second connecting plate is at the top position in the installation groove 18, and the multiple groups of first connecting plates 22 are in a state of uniform distribution in the installation groove 18 under the action of adjacent springs, thereby making the mixing plates 13 in a uniformly distributed state in the mixing box 3. In this way, when the transmission shaft 7 rotates, the mixing plate 13 is caused to revolve around the transmission shaft 7 through the action of the first connecting plate 22 and the square block 19, thereby mixing the liquid below the filter plate 6 in the mixing box 3. When the filter plate 6 rotates, the filter plate 6 first moves downward under the cooperation of the protruding column 15 and the reciprocating thread groove 11, so that the second connecting plate 13 is in the installation groove 18. The groove 18 moves toward the first connecting plate 22, thereby causing the second connecting plate to push the first connecting plate 22 to move downward and allowing multiple groups of first connecting plates 22 to gradually fit together. When the boss 15 moves to the bottom end of the reciprocating thread groove 11 and begins to move upward to reset, multiple groups of square blocks 19 fit together, thereby causing multiple groups of mixing plates 13 to approach each other. During the mixing process of the fertilizing liquid, the reciprocating movement of the filter plate 6 will not affect the mixing effect of the mixing plate 13 through the movable mixing plate 13, and during the downward movement of the filter plate 6, the fertilizer on it will continue to fall downward, and the falling fertilizer will be quickly mixed through a group of mixing plates 13 close to the filter plate 6, thereby improving the mixing efficiency.

[0038] Furthermore, preferably, one end of the mixing plate 13 close to the square block 19 is fixedly connected to a fixed shaft 23, and the other end of the fixed shaft 23 away from the mixing plate 13 is rotatably connected to the square block 19. The side wall of the square block 19 is elastically connected to the limit frame 21 by a spring, and the top of the limit frame 21 slides out of the top of the square block 19. The limit frame 21 is a "concave" structure, and the limit frame 21 is sleeved on the periphery of the fixed shaft 23. A plurality of groups of limit holes 20 are provided in a ring array on the fixed shaft 23, and the limit holes 20 are provided at positions corresponding to the limit frames 21. The limit posts 24 are fixedly provided with limit holes corresponding to the limit holes. 20 sliding adaptation limit column 24, the limit column 24 is set just below the fixed shaft 23; in specific use, in the initial state, multiple groups of mixing plates 13, square blocks 19, and first connecting plates 22 are evenly distributed on the transmission shaft 7, and the filter plate 6 is at the top position of the mounting groove 18. The top of the limit frame 21 protrudes from the top of the square block 19 under the action of the corresponding spring. The limit column 24 is adapted to the limit hole 20 so that the position of the fixed shaft 23 is limited. When the filter plate 6 moves downward, the bottom of the filter plate 6 will first contact the top of the limit frame 21 and push the limit frame 21 to move downward. , the limit frame 21 moves downward so that the limit column 24 moves and separates from the limit hole 20, thereby releasing the limit on the fixed shaft 23, so that the mixing plate 13 has the conditions for rotation, and then the filter plate 6 moves downward to the bottom end position of the reciprocating thread groove 11 and starts to move and reset. During this process, the multiple groups of square blocks 19 gradually approach and fit together, thereby making the multiple groups of limit frames 21 move downward respectively, so that the corresponding limit columns 24 and limit holes 20 are separated, so that the multiple groups of mixing plates 13 can have the conditions for free rotation. In this way, when the multiple groups of square blocks 19 fit together, the mixing plate 13 is The self-rotation of the mixing plate 13 can generate stronger turbulence, increase the turbulence of the liquid, and make the fertilizers of different components more fully mixed, thereby improving the mixing uniformity and avoiding the problem of too high or too low concentration of the fertilizer liquid near the bottom of the mixing box 3. At the same time, it avoids the situation where multiple groups of mixing plates 13 cannot rotate after approaching each other and are in a vertical state, so that multiple groups of mixing plates 13 form plates with a similar larger area. In this way, when the mixing plate 13 rotates, it will push the liquid on both sides to rotate as a whole, thereby failing to effectively achieve effective mixing of the various components in the fertilizer liquid.

[0039] See also Figure 9Preferably, a first inclined surface is provided on both sides of the mixing plate 13, and a second inclined surface is provided at the upper and lower ends of the mixing plate 13. Through the setting of the first inclined surface and the second inclined surface, when the water flows along the first inclined surface and the second inclined surface, different pressures will be generated on both sides of the mixing plate 13, forming a torque around the fixed axis 23 as the axis, causing the mixing plate 13 to rotate. The rotation of the mixing plate 13 increases the shear force of the liquid, which helps to break up the agglomerated particles and make them more evenly dispersed and mixed, thereby helping to improve the quality and production efficiency of fertilizer mixing.

Claims

1. A precision fertilizer applicator for agricultural planting, comprising a fertilizer applicator body; characterized in that: A spray assembly is installed at the front end of the fertilizer spreader body, a mixing box is installed at one end of the fertilizer spreader body away from the spray assembly, a feeding port is provided on the top of the mixing box, a filter plate is provided in the mixing box, a grinding assembly is provided on the top of the filter plate, the grinding assembly is slidably connected to the inner wall of the mixing box, a mixing assembly is provided in the center of the mixing box, the filter plate is slidably connected to the mixing assembly, when the mixing assembly rotates, the mixing assembly drives the filter plate to rotate, and when the filter plate rotates, the grinding assembly is driven to rotate; The grinding assembly includes a grinding roller; one end of the grinding roller close to the inner wall of the mixing box is fixedly connected to a connecting shaft, and the end of the connecting shaft away from the grinding roller is rotatably connected to a slider, and the periphery of the connecting shaft is fixedly connected to a transmission wheel, and the bottom of the transmission wheel is slidably engaged with the top of the filter plate; The mixing assembly includes a transmission shaft; the transmission shaft is arranged at the center of the mixing box and the filter plate, and the transmission shaft and the filter plate are slidably connected. The top transmission of the transmission shaft is provided with a motor, and the motor is fixedly installed at the top center of the mixing box. The periphery of the transmission shaft is symmetrically provided with mixing plates along the center, and the mixing plates are arranged in multiple groups in a vertical array on the transmission shaft. The filter plate is slidably connected to the transmission shaft; The inner wall of the mixing box is provided with a reciprocating thread groove, and the outer edge side wall of the filter plate is fixedly provided with a protrusion that is slidably adapted to the reciprocating thread groove; The transmission shaft is provided with a mounting groove, in which a first connecting plate is slidably connected, a square block is provided on one end of the mixing plate close to the transmission shaft, and an end of the square block away from the mixing plate is fixedly connected to the end of the first connecting plate, and the center of the filter plate is fixedly connected to a second connecting plate that is slidably adapted to the mounting groove, and a spring is provided between two adjacent groups of first connecting plates; One end of the mixing plate close to the square block is fixedly connected to a fixed shaft, and the other end of the fixed shaft away from the mixing plate is rotatably connected to the square block. A limit frame is elastically connected to the side wall of the square block, and the top of the limit frame slides and protrudes from the top of the square block. The limit frame is a "concave" structure, and the fixed shaft is sleeved on the periphery of the fixed shaft. The fixed shaft is provided with multiple groups of limit holes in a circular array, and the limit holes are arranged at positions corresponding to the limit frame. The limit frame is fixed with a limit column that is slidably adapted to the limit hole, and the limit column is arranged directly below the fixed shaft.

2. The agricultural planting precision fertilizer applicator according to claim 1, characterized in that: The outer periphery of the connecting shaft is rotatably connected to a fixed plate, the bottom of the fixed plate is fixedly connected to an annular plate, and the top of the filter plate is provided with an annular groove slidably connected to the bottom end of the annular plate.

3. The agricultural planting precision fertilizer applicator according to claim 2, characterized in that: The side wall of the mixing box is provided with a slide groove, and the sliding block is slidably connected to the slide groove.

4. The agricultural planting precision fertilizer applicator according to claim 3, characterized in that: The mixing plate is provided with first inclined surfaces on both sides, and second inclined surfaces are provided on the upper and lower ends of the mixing plate.

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