An automatic bio-organic fertilizer application device

Abstract

This utility model discloses an automatic bio-organic fertilizer applicator, belonging to the field of fertilization technology. It includes: a tractor; a fertilizer applicator; a dual-sided fertilization assembly, comprising two lateral fertilization pipes symmetrically and laterally installed on both sides of the vehicle frame, and lateral discharge pipes connecting the two lateral fertilization pipes to the fertilizer funnel; and a rotary fertilization assembly, comprising a rotary fertilization pipe rotatably installed at the rear end of the vehicle frame, and a rear discharge pipe connecting the rotary fertilization pipe to the fertilizer funnel. During fertilization, the user selects either the dual-sided fertilization assembly or the rotary fertilization assembly based on the desired fertilization scenario. Multiple fertilizer discharge holes are equidistantly spaced at the bottom of both the two lateral fertilization pipes and the rotary fertilization pipe. This utility model can flexibly switch between two fertilization modes according to actual agronomic needs, realizing the core function of "one machine, two modes, fertilization on demand," and achieving the beneficial effect of "one machine, multiple uses."

Description

Technical Field

[0001] This utility model belongs to the field of fertilization technology, and in particular to an automatic fertilization device for biological organic fertilizer. Background Technology

[0002] An automated bio-organic fertilizer application device is a mechanized equipment used in agricultural planting to precisely and evenly apply bio-organic fertilizer to the soil. It typically consists of a walking mechanism, a fertilizer storage bin, and a fertilizer conveying mechanism. With the increasing promotion of green agriculture and sustainable development concepts, bio-organic fertilizers are widely used in the cultivation of field crops, orchards, vegetables, and cash crops due to their advantages such as improving soil structure, enhancing crop quality, and reducing chemical residues. Traditional fertilizer applicators are mostly designed for chemical fertilizers and cannot meet the specific application requirements of organic fertilizers, necessitating the development of automated fertilization equipment.

[0003] Current fertilizer application equipment on the market exhibits a series of structural and functional defects when used in bio-organic fertilizer operations. For example, the vast majority of existing fertilizer applicators only have a single application mode—they can only perform rear strip fertilization or only support side application. This design stems from the limited application scenarios of traditional chemical fertilizers, but it proves extremely inflexible when faced with diverse organic farming practices. If a single-mode fertilizer applicator is used, farmers have to purchase two sets of equipment or stop the machine midway to replace fertilizer application components, which not only increases equipment investment costs but also significantly reduces operational efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an automatic bio-organic fertilizer application device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic bio-organic fertilizer application device, comprising:

[0006] The tractor unit serves as the power source for fertilization.

[0007] The fertilizer applicator, towed to the rear of a tractor, includes a vehicle frame and a fertilizer funnel chamber mounted on the vehicle frame.

[0008] The dual-sided fertilization assembly includes two lateral fertilization pipes symmetrically and laterally installed on both sides of the vehicle frame, and lateral feed pipes that connect the two lateral fertilization pipes and the fertilization funnel chamber respectively.

[0009] The rotary fertilizer applicator includes a rotary fertilizer applicator pipe rotatably mounted at the rear end of the vehicle frame and a tail discharge pipe connecting the rotary fertilizer applicator pipe and the fertilizer funnel chamber.

[0010] The tail discharge pipe is rotatably connected to the rotary fertilizer pipe. Both the tail discharge pipe and the two side discharge pipes have discharge valves. During fertilization, the fertilization method can be selected from the double-sided fertilizer assembly and the rotary fertilizer assembly according to the required fertilization scenario. The bottom of the two side fertilizer pipes and the rotary fertilizer pipe are provided with multiple fertilizer discharge holes at equal intervals.

[0011] In this preferred embodiment, both the lateral fertilization pipe and the rotary fertilization pipe have a conveying and feeding assembly in their inner cavities for conveying fertilizer to be discharged from the fertilizer feeding hole, and the fertilizer in the fertilizer funnel is output through the lateral feeding pipe or the tail feeding pipe.

[0012] In a preferred embodiment of this scheme, the conveying and feeding assembly includes a conveying screw rotatably installed in the inner cavity of the lateral fertilization pipe and the rotary fertilization pipe, respectively, and a second servo motor fixed at one end of the lateral fertilization pipe and the rotary fertilization pipe for driving the conveying screw to rotate.

[0013] In this preferred embodiment, the end of the lateral fertilization pipe and the rotary fertilization pipe away from the fertilization funnel is integrally formed with an inner connecting pipe. A removable sealing cap is snapped onto the inner connecting pipe. The removable sealing cap is fastened to the inner connecting pipe by fixing bolts. The end of the conveying screw away from the fertilization funnel is connected to the removable sealing cap by a bearing.

[0014] In a preferred embodiment, the rear end of the tractor is connected to a traction axle, the end of the vehicle frame near the tractor is welded with an extension axle, and the free end of the traction axle is welded with a traction engagement plate for engaging the extension axle.

[0015] In a preferred embodiment, the extension shaft is adapted to be inserted into the traction engagement plate, and the traction engagement plate is fastened to the extension shaft by a pin and a locking bolt.

[0016] In this preferred embodiment, a motor support is welded to the rear end of the vehicle frame, and a first servo motor is installed in the motor support. The output shaft of the first servo motor rotates longitudinally through the motor support and is connected to a rotating support plate. A connecting base is welded to the bottom surface of the side fertilizer pipe and the rotating fertilizer pipe near the fertilizer funnel. The connecting base of the rotating fertilizer pipe is fixedly connected to the rotating support plate by bolts.

[0017] In this preferred embodiment, a sealed bearing is fixedly embedded at the top of the rotating fertilizer pipe and at one end near the fertilizer funnel, and the end of the tail discharge pipe away from the fertilizer funnel is interference-fitted with the inner ring of the sealed bearing.

[0018] In a preferred embodiment, a power distribution box is installed on the top surface of the vehicle frame near the tractor, a wheel cover is provided above the tires of the tractor, and a control panel box is installed on the top surface of the wheel cover.

[0019] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0020] This automatic bio-organic fertilizer applicator features a technical solution that allows for flexible switching between two fertilization modes based on actual agronomic needs, achieving the core function of "one machine, two modes, and on-demand fertilization." Specifically, the dual-side fertilization components are connected to the fertilizer funnel via two lateral fertilization pipes and a lateral discharge pipe, while the rotary fertilization components are connected to the fertilizer funnel via a rotary fertilization pipe and a tail discharge pipe. This structural design allows the device to simultaneously fertilize both sides of the crop rows or switch to a tail-swinging wide-range fertilization mode during field operations. Compared to traditional fertilizer applicators with a single fertilization mode that cannot adapt to multiple scenarios, this solution significantly improves the equipment's versatility and operational efficiency, avoiding the cost of farmers purchasing multiple specialized devices. It also reduces non-operational time such as turning around and changing equipment in the field, achieving the beneficial effects of "one machine for multiple uses and high efficiency and cost savings." Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the fertilizer applicator of this utility model;

[0024] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A;

[0025] Figure 4 This is a schematic diagram of the installation structure of the rotary fertilizer applicator of this utility model;

[0026] Figure 5 This is a schematic diagram of the disassembly structure of the pin and locking bolt of this utility model;

[0027] Figure 6 This is a schematic diagram of the installation structure of the side feed tube and the tail feed tube of this utility model;

[0028] Figure 7 This utility model Figure 4 Enlarged structural diagram at point B;

[0029] Figure 8This is a schematic diagram of the disassembled structure of the conveying screw of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] In the diagram: 1. Tractor; 2. Fertilizer applicator; 3. Dual-sided fertilizer applicator assembly; 4. Rotary fertilizer applicator assembly; 5. Wheel cover; 6. Control panel box; 7. Extension shaft; 8. Vehicle frame; 9. Fertilizer funnel; 10. Side fertilizer pipe; 11. Electrical distribution box; 12. Rotary fertilizer pipe; 13. Traction shaft; 14. Moving wheel; 15. Side feed pipe; 16. Tail feed pipe; 17. Motor support; 18. First servo motor; 19. Rotary support plate; 20. Traction engagement plate; 21. Pin; 22. Locking bolt; 23. Feed valve; 24. Sealed bearing; 25. Second servo motor; 26. Connecting base; 27. Fertilizer feed hole; 28. Conveying screw; 29. ​​Internal connecting pipe; 30. Removable sealing cover; 31. Fixing bolt. Detailed Implementation

[0032] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0033] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0034] This embodiment provides, for example Figures 1 to 8 An automatic bio-organic fertilizer application device shown includes:

[0035] Tractor 1 serves as the power source for fertilization;

[0036] Fertilizer truck 2 is towed to the rear end of tractor 1, and includes a vehicle frame 8 and a fertilizer funnel 9 mounted on the vehicle frame 8.

[0037] The dual-side fertilization assembly 3 includes two lateral fertilization pipes 10 symmetrically and laterally installed on both sides of the vehicle frame 8, and a lateral feeding pipe 15 that connects the two lateral fertilization pipes 10 and the fertilization funnel 9 respectively.

[0038] The rotary fertilizer applicator 4 includes a rotary fertilizer applicator pipe 12 rotatably mounted at the rear end of the vehicle frame 8 and a tail discharge pipe 16 connecting the rotary fertilizer applicator pipe 12 and the fertilizer funnel 9.

[0039] The tail discharge pipe 16 is rotatably connected to the rotary fertilizer pipe 12. Both the tail discharge pipe 16 and the two side discharge pipes 15 have discharge valves 23. When fertilizing, one of the two side fertilizer components 3 and the rotary fertilizer component 4 can be selected for operation according to the required fertilization scenario. The bottom of the two side fertilizer pipes 10 and the rotary fertilizer pipe 12 are provided with multiple fertilizer discharge holes 27 at equal intervals.

[0040] In this embodiment, both the lateral fertilization pipe 10 and the rotary fertilization pipe 12 have conveying and discharging components in their inner cavities for discharging fertilizer from the fertilizer discharge holes 27. The fertilizer in the fertilizer funnel 9 is output through the lateral discharge pipe 15 or the tail discharge pipe 16. The conveying and discharging components can overcome the problems of large bio-organic fertilizer particles, poor flowability, and easy bridging and clogging, ensuring that the fertilizer is stably and continuously conveyed to each fertilizer discharge hole 27. This design achieves a reliable discharge function for high-viscosity, high-moisture organic fertilizer. Compared with existing technologies that rely on gravity-fed fertilizer discharge and are prone to material interruption or uneven discharge, this solution significantly improves the uniformity and continuity of fertilization, achieving a stable fertilizer supply effect.

[0041] In this embodiment, the conveying and feeding assembly includes a conveying screw 28 rotatably installed in the inner cavity of the lateral fertilization pipe 10 and the rotary fertilization pipe 12, and a second servo motor 25 fixed at one end of the lateral fertilization pipe 10 and the rotary fertilization pipe 12 for driving the conveying screw 28 to rotate.

[0042] In this embodiment, an inner connecting pipe 29 is integrally formed at the end of the lateral fertilization pipe 10 and the rotary fertilization pipe 12 away from the fertilization funnel 9. A removable sealing cap 30 is snapped onto the inner connecting pipe 29 and is securely connected to the inner connecting pipe 29 by fixing bolts 31. The end of the conveying screw 28 away from the fertilization funnel 9 is connected to the removable sealing cap 30 through a bearing. This allows the removable sealing cap 30 to be easily removed, facilitating subsequent inspection and maintenance of the conveying screw 28. The second servo motors 25 connected to the lateral fertilization pipe 10 and the rotary fertilization pipe 12 are both located at the end close to the fertilization funnel 9, thereby preventing the other ends of the lateral fertilization pipe 10 and the rotary fertilization pipe 12 from sinking due to unbalanced weight distribution.

[0043] In this embodiment, the rear end of the tractor 1 is connected to a traction shaft 13, and the end of the vehicle frame 8 near the tractor 1 is welded with an extension shaft 7. The free end of the traction shaft 13 is welded with a traction engagement plate 20 for engaging the extension shaft 7.

[0044] In this embodiment, the extension shaft 7 is adapted to be inserted into the traction engagement plate 20, and the traction engagement plate 20 is fastened to the extension shaft 7 by a pin 21 and a locking bolt 22. When connected solely by the pin 21, the extension shaft 7 can swing within the traction engagement plate 20, which helps the fertilizer applicator 2 to turn and move. When locked by the locking bolt 22, the fertilizer applicator 2 keeps moving in a straight line, closely following the tail end of the tractor 1.

[0045] In this embodiment, a motor support 17 is welded to the rear end of the vehicle frame 8. A first servo motor 18 is installed in the motor support 17. The output shaft of the first servo motor 18 rotates longitudinally through the motor support 17 and is connected to a rotating support plate 19. A connecting base 26 is welded to the bottom surface of the side fertilizer pipe 10 and the rotating fertilizer pipe 12 near the fertilizer funnel 9. The connecting base 26 of the rotating fertilizer pipe 12 is fixedly connected to the rotating support plate 19 by bolts. When the output shaft of the first servo motor 18 rotates and drives the rotating support plate 19 to rotate on the motor support 17, it can drive the rotating fertilizer pipe 12 to swing back and forth in a semi-circle with the first servo motor 18 as the center at the rear end of the vehicle frame 8. This allows the fertilizer in the rotating fertilizer pipe 12 to swing in a semi-circular amplitude at the rear end of the vehicle frame 8 through this semi-circular reciprocating swing. After this semi-circular fertilization is completed, the tractor 1 drives the fertilizer truck 2 forward to perform the next round of semi-circular amplitude fertilization.

[0046] In this embodiment, a sealed bearing 24 is fixedly embedded at the top of the rotary fertilizer applicator 12 and near the fertilizer funnel 9. The end of the tail discharge pipe 16 away from the fertilizer funnel 9 is interference-fitted with the inner ring of the sealed bearing 24. This allows the fertilizer in the fertilizer funnel 9 to be transported to the rotary fertilizer applicator 12 through the tail discharge pipe 16 when the rotary fertilizer applicator 4 mode is selected for fertilization. Simultaneously, the first servo motor 18 drives the rotary fertilizer applicator 12 to rotate. The design of the sealed bearing 24 does not interfere with the swing of the rotary fertilizer applicator 12. When the dual-side fertilization assembly 3 is selected for fertilization, the discharge valve 23 of the tail discharge pipe 16 is closed, and the discharge valves 23 of the two side discharge pipes 15 are opened, so that the fertilizer in the fertilization funnel 9 is transported through the two side discharge pipes 15 to the two side fertilization pipes 10, and fertilization is carried out through the fertilization discharge holes 27 at the bottom of the two side fertilization pipes 10. The tractor 1 pulls the fertilization vehicle 2 to walk on the field ridge, so that the side fertilization pipes 10 can carry the fertilization vehicle 2 to the field edges on both sides of the fertilization vehicle 2 while being pulled by the tractor 1.

[0047] In this embodiment, a power distribution box 11 is installed on the top surface of the vehicle frame 8 near the tractor 1. A wheel cover 5 is located above the tires of the tractor 1, and a control panel box 6 is installed on the top surface of the wheel cover 5. The power distribution box 11 contains a rechargeable battery that supplies power to three second servo motors 25 and one first servo motor 18. The control panel box 6 contains opening and closing operation buttons for controlling the opening and closing of the three second servo motors 25 and the first servo motor 18. The wiring in the control panel box 6 is connected to the wiring in the power distribution box 11. Four casters 14 are installed on the bottom surface of the vehicle frame 8.

[0048] Working principle

[0049] This automatic bio-organic fertilizer applicator operates by having the operator load the bio-organic fertilizer into the fertilizer funnel 9 and activate the rechargeable battery in the power distribution box 11 to power the first servo motor 18, three second servo motors 25, and the controller. The desired fertilization mode is selected via operation buttons on the control panel box 6: dual-side fertilization mode (using dual-side fertilization component 3) or rotary swing fertilization mode (using rotary fertilization component 4). The tractor 1 connects to the extension shaft 7 of the fertilizer applicator 2 via the traction shaft 13, with the extension shaft 7 inserted into the traction engagement plate 20. For stable straight-line movement (such as large-area strip fertilization), tighten the locking bolt 22 to rigidly connect the fertilizer applicator 2 to the tractor 1; for flexible steering (such as turning on field ridges), only the pin 21 connection remains, allowing the extension shaft 7 to swing within the traction engagement plate 20, improving steering flexibility.

[0050] Dual-sided fertilization mode: The discharge valve 23 in the tail discharge pipe 16 is closed, while the discharge valves 23 in the two side discharge pipes 15 are opened simultaneously. Under gravity, the bio-organic fertilizer in the fertilization funnel 9 flows through the side discharge pipes 15 into the left and right side fertilization pipes 10. Two second servo motors 25 drive the corresponding conveying screws 28 in the side fertilization pipes 10 to rotate. The conveying screws 28 push the fertilizer from the end closest to the fertilization funnel 9 to the far end, and it is evenly discharged through multiple equidistant fertilizer discharge holes 27 at the bottom of the side fertilization pipes 10, achieving continuous and uniform strip-shaped fertilization along the direction of travel. The tractor 1 drives the fertilization vehicle 2 along the field, with the moving wheels 14 supporting the stable movement of the vehicle frame 8. As the device moves forward, the side fertilization pipes 10 on both sides simultaneously fertilize the sides of the crop rows or the edges of the field ridges, suitable for crop planting scenarios with fixed row spacing.

[0051] Rotary oscillating fertilization mode: Close the discharge valves 23 in the two side discharge pipes 15, and simultaneously open the discharge valve 23 in the tail discharge pipe 16. Fertilizer flows from the fertilizer funnel 9 into the rotary fertilization pipe 12 through the tail discharge pipe 16. The first servo motor 18 starts, and its output shaft drives the rotary support plate 19 to rotate. The rotary fertilization pipe 12 is fixedly connected to the rotary support plate 19 through its connecting base 26. Therefore, it oscillates in a semi-circular manner around the first servo motor 18 at the tail end of the vehicle frame 8. The tail discharge pipe 16 is connected to the top of the rotary fertilization pipe 12 through a sealed bearing 24 to ensure that fertilizer flows in continuously and stably during the oscillation without leakage or interference. The second servo motor 25 inside the rotary fertilization pipe 12 drives the conveying screw 28 to rotate, pushing the fertilizer from the feed end to the far end, and spreading it evenly in a fan-shaped or semi-circular area through multiple fertilizer discharge holes 27 at the bottom during the oscillation. After one semi-circular swaying fertilization cycle is completed, the tractor unit pauses briefly or moves forward slowly for a distance (e.g., 2–3 meters), then resumes swaying fertilization to form a continuous fan-shaped coverage area. This mode is particularly suitable for scenarios requiring wide-area concentrated fertilization.

[0052] The removable sealing caps 30 at the distal ends of the lateral fertilization pipe 10 and the rotary fertilization pipe 12 are connected to the inner connecting pipe 29 by fixing bolts 31. When the conveying screw 28 becomes blocked or worn, the fixing bolts 31 are loosened, the removable sealing caps 30 are removed, and the conveying screw 28 can be pulled out from the pipe end for cleaning or replacement. All second servo motors 25 are installed at the end near the fertilization funnel 9 to prevent the distal end of the pipe from being too heavy and sagging or deformed, ensuring that the fertilization holes 27 are at a consistent height from the ground and guaranteeing uniform fertilization.

[0053] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic bio-organic fertilizer application device, characterized in that, include: Tractor (1); The fertilizer truck (2) is towed to the rear end of the tractor (1), and includes a vehicle frame (8) and a fertilizer funnel (9). The dual-side fertilization assembly (3) includes two lateral fertilization pipes (10) symmetrically installed on both sides of the vehicle frame (8) and a lateral feed pipe (15) connecting the two lateral fertilization pipes (10) and the fertilization funnel (9). The rotary fertilizer application assembly (4) includes a rotary fertilizer application tube (12) that is rotatably mounted on the rear end of the vehicle frame (8) and a tail discharge tube (16) that connects the rotary fertilizer application tube (12) and the fertilizer funnel (9). The tail discharge pipe (16) is rotatably connected to the rotary fertilizer pipe (12). The tail discharge pipe (16) and the two side discharge pipes (15) are equipped with discharge valves (23). When fertilizing, one of the two side fertilizer components (3) and the rotary fertilizer component (4) is selected according to the required fertilization scenario.

2. The automatic bio-organic fertilizer applying device according to claim 1, characterized in that: Both the lateral fertilization pipe (10) and the rotary fertilization pipe (12) have conveying and feeding components in their inner cavities for conveying fertilizer to be discharged from the fertilizer feeding hole (27). The fertilizer in the fertilizer funnel (9) is output through the lateral feeding pipe (15) or the tail feeding pipe (16).

3. The automatic bio-organic fertilizer applying device according to claim 2, characterized in that: The conveying and feeding assembly includes a conveying screw (28) rotatably installed in the inner cavity of the lateral fertilization pipe (10) and the rotary fertilization pipe (12), and a second servo motor (25) fixed at one end of the lateral fertilization pipe (10) and the rotary fertilization pipe (12) for driving the conveying screw (28) to rotate.

4. The automatic bio-organic fertilizer applying device according to claim 3, characterized in that: The lateral fertilization pipe (10) and the rotary fertilization pipe (12) are integrally formed with an inner connecting pipe (29) at the end away from the fertilization funnel (9). A removable sealing cap (30) is snapped onto the inner connecting pipe (29). The removable sealing cap (30) is fastened to the inner connecting pipe (29) by a fixing bolt (31). The end of the conveying screw (28) away from the fertilization funnel (9) is connected to the removable sealing cap (30) by a bearing.

5. The automatic bio-organic fertilizer applying device according to claim 1, characterized in that: The rear end of the tractor (1) is connected to a traction shaft (13), and an extension shaft (7) is welded to one end of the vehicle frame (8) near the tractor (1). The free end of the traction shaft (13) is welded with a traction engagement plate (20) for engaging the extension shaft (7).

6. The automatic bio-organic fertilizer applying device according to claim 5, characterized in that: The extension shaft (7) is adapted to be inserted into the traction engagement plate (20), and the traction engagement plate (20) is fastened to the extension shaft (7) by a pin (21) and a locking bolt (22).

7. The automatic bio-organic fertilizer applying device according to claim 1, characterized in that: The rear end of the vehicle frame (8) is welded with a motor support (17), in which a first servo motor (18) is installed. The output shaft of the first servo motor (18) rotates longitudinally through the motor support (17) and is connected to a rotating support plate (19). The bottom surface of the side fertilizer pipe (10) and the rotating fertilizer pipe (12) near the fertilizer funnel (9) is welded with a connecting base (26). The connecting base (26) of the rotating fertilizer pipe (12) is fixedly connected to the rotating support plate (19) by bolts.

8. The automatic bio-organic fertilizer applying device according to claim 7, characterized in that: A sealed bearing (24) is fixedly embedded at the top of the rotating fertilizer pipe (12) and at one end near the fertilizer funnel (9), and the end of the tail discharge pipe (16) away from the fertilizer funnel (9) is interference-fitted with the inner ring of the sealed bearing (24).

9. The automatic bio-organic fertilizer applying device according to claim 1, characterized in that: The vehicle frame (8) has an electrical distribution box (11) installed on the top surface of one end near the tractor (1). The tractor (1) has a wheel cover (5) above the tires. The top surface of the wheel cover (5) has a control panel box (6).

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