A multifunctional tobacco fertilizer device

Abstract

The utility model discloses a tobacco multifunctional fertilizing device, including car body, drill head subassembly, fertilizing subassembly, control assembly and moving wheel subassembly, car body includes the flat plate type car body for bearing drill head subassembly, fertilizing subassembly and control assembly, the utility model discloses a technical effect lies in, the utility model discloses a control assembly to control the soil penetration depth of drill head, to this drive chain type elevating gear and the automatic operation of drill head subassembly, still can control the quantitative automatic application of fertilizer. The design not only has improved the accurate control ability of fertilizing depth and fertilizing amount significantly, still through the automatic soil drilling process and fertilizing process, the manpower demand is reduced greatly, and the fertilizing demand of different types of soil and tobacco is satisfied effectively.

Description

Technical Field

[0001] This utility model relates to the field of tobacco planting technology, and in particular to a multifunctional tobacco fertilization device. Background Technology

[0002] Tobacco, as an important economic crop, is widely cultivated globally, and its yield and quality directly affect the economic benefits of the tobacco industry. Fertilizer management is one of the key factors influencing tobacco growth and quality. Traditional fertilization methods typically employ a single depth of application, which fails to meet the nutrient requirements of tobacco at different growth stages, resulting in low nutrient utilization, increased fertilization costs, and negative impacts on the soil environment.

[0003] In recent years, precision agriculture technology has been gradually applied to tobacco cultivation. Precision fertilization improves fertilizer utilization and reduces environmental pollution by accurately controlling the amount and depth of fertilizer application. However, existing tobacco fertilization equipment still suffers from insufficient flexibility, complex operation, and high costs in deep fertilization, making it difficult to meet the needs of modern tobacco cultivation. The root distribution characteristics of tobacco mean that its nutrient requirements vary at different growth stages; the root system is shallower in the early stages and develops deeper in the later stages. Therefore, single-stage deep fertilization cannot fully meet its nutrient needs. Summary of the Invention

[0004] To address the shortcomings of current single-depth fertilization methods in providing sufficient nutrient supply to tobacco and the deficiencies of fertilization equipment, this application provides a tobacco fertilization machine capable of applying fertilizer at different depths.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is as follows:

[0006] A multi-functional tobacco fertilization device includes a vehicle body 8, a drill bit assembly 12, a fertilization assembly, a control assembly, and a moving wheel assembly 10;

[0007] The vehicle body 8 includes a flatbed body for carrying the drill bit assembly 12, the fertilization assembly, and the control assembly;

[0008] The drill assembly 12 includes a chain lifting device 1, a rotary motor 2, and a drill body. The chain lifting device 1 is fixed to the upper surface of the flatbed vehicle body and connected to the rotary motor 2 to control the lifting of the rotary motor 2. The top of the drill body is connected to the rotary motor 2 and driven by the rotary motor 2 to rotate. The bottom of the drill body is the drill tip. The drill tip passes through a drill hole reserved on the flatbed vehicle body and extends downward to drill a hole in the ground under the lifting control of the chain lifting device 1.

[0009] The chain-type lifting device 1 includes a support platform, two sprockets 102, two chains 101, a synchronous shaft 106, a synchronous belt 103, a synchronous pulley 104, and a slider 105. The support platform includes two vertically arranged support plates, with a space between them to accommodate the rotary motor 2. The top of each support plate has a shaft hole for the synchronous shaft 106 to pass through. The synchronous shaft 106 passes horizontally through the two support plates and extends its end beyond the support plates. The synchronous shaft 106 is rotatably fixed in the shaft hole by bearings. The end is connected to the synchronous pulley 104 via a synchronous belt 103. The synchronous pulley 104 is driven by the synchronous motor 3 to rotate and drive the synchronous shaft 106 to rotate. The two sprockets 102 are fixed to both sides of the synchronous shaft 106 through the central hole to follow the rotation of the synchronous pulley 104. The chain 101 is wound around the sprocket 102. One end of the chain 101 is suspended by a slider 105, and the other end is fixed to a fixed protrusion on the side wall of the rotary motor 2, so that the rotary motor 2 can be lifted or lowered under the drive of the synchronous motor 3.

[0010] The fertilization assembly includes a fertilizer storage box 14, a fertilizer delivery pipe, and a fertilizer outlet 17. The fertilizer storage box 14 is a hollow box with an opening at the top. The fertilizer delivery pipe is located at the bottom of the fertilizer storage box 14 and connects to the fertilizer storage box 14. The fertilizer delivery pipe passes through a fertilizer hole pre-reserved on the flatbed vehicle and extends downward. The fertilizer outlet 17 is an extension pipe located at the bottom of the fertilizer delivery pipe, and the fertilizer outlet 17 is inclined toward the drilling position of the drill bit tip to guide the fertilizer into the drill hole. A baffle unit 16 is provided at the connection between the fertilizer outlet 17 and the fertilizer delivery pipe.

[0011] The control components include an electrical box 5 and a PLC controller 4. The electrical box 5 is fixed to the upper surface of the flatbed vehicle body. The electrical box 5 contains a battery assembly for providing power and is electrically connected to the drill bit assembly 12, the fertilizer assembly, and the moving wheel assembly 10. The PLC controller 4 is fixed to the top of the electrical box 5 and is communicatively connected to the drill bit assembly 12, the fertilizer assembly, and the moving wheel assembly 10.

[0012] The movable wheel assembly 10 includes four movable wheels located at the four corners of the lower surface of the flatbed vehicle body. Each movable wheel includes a lifting unit 13 and a wheel unit. The top of the lifting unit 13 is connected to the bottom of the flatbed vehicle body to raise or lower the height of the flatbed vehicle body. The wheel unit is connected to the bottom of the lifting unit 13 and contacts the ground to achieve rolling.

[0013] The multifunctional tobacco fertilization device has through holes at all four corners of the rotary motor 2. Four limiting rods 108 corresponding to the positions of the through holes are fixed on the surface of the flatbed vehicle. The limiting rods 108 pass through the four through holes of the rotary motor 2. A fixing plate is also provided between two vertically arranged support plates. The fixing plate is lower than the bottom of the sprocket 102. The top of the limiting rods 108 is fixed on the fixing plate, and the fixing plate has a chain hole for the chain 101 to pass through.

[0014] The multifunctional tobacco fertilization device has a cylindrical sliding sleeve 109 inside the through hole of the rotary motor 2, and the limiting rod 108 passes through the sliding sleeve 109.

[0015] The multifunctional tobacco fertilization device described above includes a drill bit position sensing unit at the bottom of the flat-panel vehicle body, which is communicatively connected to the control components. The drill bit position sensing unit includes an infrared transmitter 18 and an infrared receiver 19. Both the infrared transmitter 18 and the infrared receiver 19 are located on the lower surface of the flat-panel vehicle body and are respectively located on both sides of the drill bit body. The transmitting end of the infrared transmitter 18 is horizontally facing the receiving end of the infrared receiver 19. The infrared transmission path of the infrared transmitter 18 is blocked when the drill bit is lowered to drill, but is not blocked when the drill bit is raised.

[0016] The multifunctional tobacco fertilization device includes a baffle unit 16 comprising a baffle drive motor, a lead screw module, and a movable baffle. The baffle drive motor is a stepper motor and is electrically connected to a control component. The movable baffle is connected to the baffle drive motor via the lead screw module, and the baffle drive motor drives the lead screw module to achieve lifting and lowering, thereby opening or closing the connection path between the fertilizer delivery pipe and the fertilizer outlet 17.

[0017] The multifunctional tobacco fertilization device has a weight sensor 15 at the bottom of the fertilizer delivery pipe. The weight sensor 15 is communicatively connected to the control component and sends the weight information of the fertilizer storage box 14 and the fertilizer in the fertilizer delivery pipe to the control component.

[0018] The aforementioned multifunctional tobacco fertilization device has shaft holes on both sides of the connection between the fertilizer outlet 17 and the fertilizer delivery pipe. A rotating shaft 9 passes through the shaft holes on the fertilizer outlet 17 and the fertilizer delivery pipe to rotatably connect the fertilizer outlet 17 to the fertilizer delivery pipe, thereby allowing the fertilizer outlet 17 to change its tilt angle relative to the ground. The rotating shaft 9 is a screw, and a nut is provided on one side, so that the fertilizer outlet 17 can be fixed or its tilt angle can be changed by tightening or loosening the nut.

[0019] The multifunctional tobacco fertilization device also includes two push rods 6 and two handles 7. The bottom of the two push rods 6 is fixed to one side of the upper surface of the flatbed vehicle, and the top of the push rods 6 is horizontally fixed with the handles 7.

[0020] The multifunctional tobacco fertilization device includes a drill bit body comprising a drill bit shaft and spiral blades. The top of the drill bit shaft is fixed in a rotary motor 2, the bottom of the drill bit shaft is the drill bit tip, and the spiral blades are spirally arranged around the middle of the drill bit shaft.

[0021] In the aforementioned multifunctional tobacco fertilization device, the wheel unit of the moving wheel assembly 10 is a swivel wheel.

[0022] The technical advantage of this invention lies in its ability to control the soil penetration depth of the drill bit through a control component, thereby driving the automated operation of the chain lifting device 1 and the drill bit assembly 12. It also enables the automated quantitative application of fertilizer. This design not only significantly improves the precise control of fertilization depth and amount but also greatly reduces manpower requirements through automated soil drilling and fertilization processes, effectively meeting the fertilization needs of different soil types and tobacco cultivation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is an exploded view of the chain lifting device.

[0025] Figure 3 This is an exploded view of the rotating electric machine.

[0026] Figure 4 This is a schematic diagram of the rotating shaft.

[0027] Wherein: 1 is a chain lifting device, 2 is a rotary motor, 3 is a synchronous motor, 4 is a PLC controller, 5 is an electrical box, 6 is a push rod, 7 is a handle, 8 is a vehicle body, 9 is a rotating shaft, 10 is a moving wheel assembly, 12 is a drill bit assembly, 13 is a lifting unit, 14 is a fertilizer storage box, 15 is a weight sensor, 16 is a baffle unit, 17 is a fertilizer outlet, 18 is an infrared transmitter, 19 is an infrared receiver, 101 is a chain, 102 is a sprocket, 103 is a synchronous belt, 104 is a synchronous pulley, 105 is a slider, 106 is a synchronous shaft, 108 is a limit rod, 109 is a sliding sleeve, and 201 is a fixed protrusion. Detailed Implementation

[0028] See Figure 1 The multifunctional tobacco fertilization device provided in this embodiment includes a vehicle body 8, a drill bit assembly 12, a fertilization assembly, a control assembly, and a moving wheel assembly 10.

[0029] The vehicle body 8 includes a flatbed body for carrying the drill bit assembly 12, the fertilization assembly, and the control assembly.

[0030] The drill bit assembly 12 includes a chain lifting device 1, a rotary motor 2, and a drill bit body. The chain lifting device 1 is fixed to the upper surface of the flatbed vehicle body and connected to the rotary motor 2 to control the lifting of the rotary motor 2. The top of the drill bit body is connected to the rotary motor 2 and driven by the rotary motor 2 to rotate. The bottom of the drill bit body is the drill bit tip, which passes through a drill bit hole reserved in the flatbed vehicle body and extends downward to drill a hole in the ground under the lifting control of the chain lifting device 1.

[0031] The chain-type lifting device 1 includes a support platform, two sprockets 102, two chains 101, a synchronous shaft 106, a synchronous belt 103, a synchronous pulley 104, and a slider 105. The support platform includes two vertically arranged support plates, with a space between them to accommodate a rotary motor 2. The top of each support plate has a shaft hole for the synchronous shaft 106 to pass through. The synchronous shaft 106 passes horizontally through the two support plates, with its end extending beyond the support plates. The synchronous shaft 106 is rotatably fixed in the shaft hole by bearings. The end of the synchronous shaft 106 is connected to the synchronous pulley 104 via the synchronous belt 103. The synchronous pulley 104 is driven by the synchronous motor 3 to rotate, thereby causing the synchronous shaft 106 to rotate. The two sprockets 102... The chain 101 is fixed to both sides of the synchronous shaft 106 through the central hole to rotate with the synchronous wheel 104. The chain 101 is wound around the sprocket 102. One end of the chain 101 is suspended by a slider 105, and the other end is fixed to a fixed protrusion on the side wall of the rotary motor 2. The slider 105 is used to maintain balance and the rotary motor 2 is lifted or lowered under the drive of the synchronous motor 3. The fixed protrusion is a block-shaped body set outside the rotary motor 2 and has a connector on its surface for connecting the chain so that the chain 101 can be connected.

[0032] To ensure the stability of the rotary motor 2 during movement of the vehicle body 8 and drilling, this embodiment provides through holes at all four corners of the rotary motor 2. Four limiting rods 108, corresponding to the positions of the through holes, are fixed to the upper surface of the flat-plate vehicle body. The limiting rods 108 pass through the four through holes of the rotary motor 2. A fixing plate is also provided between two vertically arranged support plates, with the fixing plate positioned below the bottom of the sprocket 102. The top ends of the limiting rods 108 are fixed to the fixing plate, and the fixing plate has a chain hole for the chain 101 to pass through, ensuring that the movement of the chain 101 is not affected by the fixing plate. Simultaneously, to ensure smooth lifting and lowering of the rotary motor 2 and reduce the frictional impact of the limiting rods 108 on the rotary motor 2 body, this embodiment provides a cylindrical sliding sleeve 109 inside the through holes of the rotary motor 2, through which the limiting rods 108 pass.

[0033] The fertilization assembly includes a fertilizer storage box 14, a fertilizer delivery pipe, and a fertilizer outlet 17. The fertilizer storage box 14 is a hollow box with an opening at the top. The fertilizer delivery pipe is located at the bottom of the fertilizer storage box 14 and connects to the fertilizer storage box 14. The fertilizer delivery pipe passes through a fertilizer hole pre-reserved on the flatbed vehicle and extends downward. The fertilizer outlet 17 is an extension pipe located at the bottom of the fertilizer delivery pipe, and the fertilizer outlet 17 is inclined toward the drilling position of the drill bit tip to guide the fertilizer into the drill hole. A baffle unit 16 is provided at the connection between the fertilizer outlet 17 and the fertilizer delivery pipe.

[0034] The baffle unit 16 of the fertilization assembly in this embodiment includes a baffle drive motor, a lead screw module, and a movable baffle. The baffle drive motor is a stepper motor, which is electrically connected to the control component. The movable baffle is connected to the baffle drive motor via the lead screw module, and the baffle drive motor drives the lead screw module to achieve lifting and lowering, thereby opening or closing the communication path between the fertilizer delivery pipeline and the fertilizer outlet 17. The lead screw of the lead screw module is connected to the baffle drive motor to achieve rotation, and the moving block of the lead screw module is screwed onto the lead screw and connected to the movable baffle to drive the movable baffle to lift and lower.

[0035] To prevent fertilizer from being obstructed and falling correctly into the borehole when the drill bit is lowered, this embodiment also includes a drill bit position sensing unit at the bottom of the flatbed vehicle body, which is communicatively connected to the control components. The drill bit position sensing unit includes an infrared transmitter 18 and an infrared receiver 19, both located on the lower surface of the flatbed vehicle body and on opposite sides of the drill bit body. The transmitting end of the infrared transmitter 18 faces horizontally towards the receiving end of the infrared receiver 19. The infrared emission path of the infrared transmitter 18 is blocked when the drill bit is lowered for drilling, but not when it is raised. Thus, the control components can determine the current raising or lowering status of the drill bit based on whether the infrared receiver 19 receives an infrared signal, thereby stopping fertilizer application when the drill bit is lowered and resuming application after the drill bit is raised.

[0036] To accurately control the amount of fertilizer applied, this embodiment includes a weight sensor 15 at the bottom of the fertilizer delivery pipeline. The weight sensor 15 is communicatively connected to the control component and transmits the weight information of the fertilizer storage box 14 and the fertilizer delivery pipeline to the control component. This allows the control component to obtain the fertilizer weight via the weight sensor 15 before fertilization and to continuously monitor the fertilizer weight during fertilization. When the weight change reaches a predetermined value, the movable baffle is lowered to stop fertilization.

[0037] In order to achieve accurate fertilization based on the relative position of the borehole, the fertilizer outlet 17 in this embodiment is provided with shaft holes on both sides of the connection between the fertilizer outlet 17 and the fertilizer delivery pipe. A rotating shaft 9 passes through the shaft holes on the fertilizer outlet 17 and the fertilizer delivery pipe to rotate the fertilizer outlet 17 to the fertilizer delivery pipe, so that the fertilizer outlet 17 can change its tilt angle relative to the ground. The rotating shaft 9 is a screw and has a nut on one side, so that the fertilizer outlet 17 can be fixed or its tilt angle can be changed by tightening or loosening the nut, so that the fertilizer can fall accurately into the borehole.

[0038] The drill bit body in this embodiment includes a drill bit shaft and helical blades. The top of the drill bit shaft is fixed in the rotary motor 2, the bottom of the drill bit shaft is the drill tip, and the helical blades are spirally arranged around the middle of the drill bit shaft to improve drilling efficiency.

[0039] The control components include an electrical box 5 and a PLC controller 4. The electrical box 5 is fixed to the upper surface of the flatbed vehicle body. The electrical box 5 contains a battery assembly for providing power and is electrically connected to the drill bit assembly 12, the fertilizer assembly, and the moving wheel assembly 10. The PLC controller 4 is fixed to the top of the electrical box 5 and is communicatively connected to the drill bit assembly 12, the fertilizer assembly, and the moving wheel assembly 10.

[0040] The movable wheel assembly 10 includes four movable wheels located at the four corners of the lower surface of the flatbed vehicle. Each movable wheel includes a lifting unit 13 and wheel units. The top of the lifting unit 13 is connected to the bottom of the flatbed vehicle to raise or lower its height. The wheel units are connected to the bottom of the lifting unit 13 and contact the ground for rolling. The lifting unit 13 can be implemented using common lifting components such as cylinders, hydraulic cylinders, or electric cylinders, allowing the flatbed vehicle to rise and fall according to ground conditions for easy movement in the field. In this embodiment, the wheel units of the movable wheel assembly 10 are omnidirectional wheels to facilitate steering during flatbed vehicle movement. The flatbed vehicle also includes two push rods 6 and two handles 7. The bottoms of the two push rods 6 are fixed to one side of the upper surface of the flatbed vehicle, and the tops of the push rods 6 are horizontally fixed to the handles 7. The handles 7 are fitted with striped protrusions to increase friction, facilitating the movement of the flatbed vehicle.

[0041] In this embodiment, fertilization depth of 20 cm is taken as an example during actual operation. First, the fertilizer applicator is moved to the field where fertilization is needed. Then, the power in the electrical box 5 is turned on, the PLC controller 4 is started, and the fertilization depth is set to 20 cm. Pressing the start button, the PLC controller 4 transmits a signal to the chain lifting device 1 motor and the drill assembly 12 rotary motor 2 to start. The chain lifting device 1 motor starts to rotate, driving the chain 101 to drive the fixed socket to move longitudinally in a straight line. The fixed socket drives the rotary motor 2 to penetrate the soil through the drill assembly 12. The spiral blades and drill bit design of the drill assembly 12 ensure effective penetration of the soil to a depth of 20 cm. Using the PLC to control the chain lifting device 1 motor, the drill assembly 12 is retracted from the soil to the ground. At this time, the infrared receiver 19 receives the infrared light emitted by the infrared detector, controls the baffle to open, and the weight sensor, along with the fertilizer, is applied from the fertilizer outlet pipe into the 20 cm deep borehole. When the weight change reaches the set threshold, the baffle closes.

[0042] The above embodiments describe the device composition and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The above embodiments and descriptions in the specification are only for illustrating the specific working principle of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multifunctional tobacco fertilization device, characterized in that, Includes vehicle body (8), drill bit assembly (12), fertilizer assembly, control assembly and moving wheel assembly (10); The vehicle body (8) includes a flatbed body for carrying the drill bit assembly (12), the fertilization assembly and the control assembly; The drill assembly (12) includes a chain lifting device (1), a rotary motor (2) and a drill body; the chain lifting device (1) is fixed to the upper surface of the flatbed vehicle and connected to the rotary motor (2) to control the rotation of the rotary motor (2); the top of the drill body is connected to the rotary motor (2) and driven by the rotary motor (2) to rotate; the bottom of the drill body is the drill tip; the drill tip passes through the drill hole reserved on the flatbed vehicle and extends downward to drill a hole in the ground under the lifting control of the chain lifting device (1); The chain lifting device (1) includes a support platform, two sprockets (102), two chains (101), a synchronous shaft (106), a synchronous belt (103), a synchronous pulley (104), and a slider (105). The support platform includes two vertically arranged support plates, with a distance between the two support plates to accommodate the rotary motor (2). The top of the support plate is provided with a shaft hole for the synchronous shaft (106) to pass through. The synchronous shaft (106) passes through the two support plates and its end extends out of the support plate. The synchronous shaft (106) is rotatably fixed in the shaft hole by bearings. The end of the synchronous shaft (106) is connected to the shaft hole. The synchronous belt (103) is connected to the synchronous pulley (104). The synchronous pulley (104) is driven by the synchronous motor (3) to rotate and drive the synchronous shaft (106) to rotate. The two sprockets (102) are fixed on both sides of the synchronous shaft (106) through the central hole to follow the rotation of the synchronous pulley (104). The chain (101) is wound around the sprocket (102). One end of the chain (101) is suspended by a slider (105), and the other end is fixed on a fixed protrusion on the side wall of the rotary motor (2), so that the rotary motor (2) can be lifted or lowered under the drive of the synchronous motor (3). The fertilization assembly includes a fertilizer storage box (14), a fertilizer delivery pipe, and a fertilizer outlet (17). The fertilizer storage box (14) is a hollow box with an opening at the top. The fertilizer delivery pipe is located at the bottom of the fertilizer storage box (14) and connects to the fertilizer storage box (14). The fertilizer delivery pipe passes through a fertilizer hole reserved on the flatbed vehicle and extends downward. The fertilizer outlet (17) is an extension pipe located at the bottom of the fertilizer delivery pipe. The fertilizer outlet (17) is inclined toward the drilling position of the drill bit tip to guide the fertilizer into the drill hole. A baffle unit (16) is provided at the connection between the fertilizer outlet (17) and the fertilizer delivery pipe. The control components include an electrical box (5) and a PLC controller (4). The electrical box (5) is fixed to the upper surface of the flatbed vehicle body. The electrical box (5) is equipped with a battery assembly for providing power and is electrically connected to the drill assembly (12), the fertilizer assembly and the moving wheel assembly (10). The PLC controller (4) is fixed to the top of the electrical box (5) and is communicatively connected to the drill assembly (12), the fertilizer assembly and the moving wheel assembly (10). The moving wheel assembly (10) includes four moving wheels located at the four corners of the lower surface of the flatbed vehicle body. The moving wheels include a lifting unit (13) and a wheel unit. The top of the lifting unit (13) is connected to the bottom of the flatbed vehicle body to raise or lower the height of the flatbed vehicle body. The wheel unit is connected to the bottom of the lifting unit (13) and contacts the ground to achieve rolling.

2. The multifunctional tobacco fertilization device according to claim 1, characterized in that, The rotary motor (2) has through holes at all four corners. Four limiting rods (108) corresponding to the positions of the through holes are fixed on the upper surface of the flat car body. The limiting rods (108) pass through the four through holes of the rotary motor (2). A fixing plate is also provided between two vertically arranged support plates. The position of the fixing plate is lower than the bottom of the sprocket (102). The top of the limiting rod (108) is fixed on the fixing plate. The fixing plate has a chain (101) hole for the chain (101) to pass through.

3. The multifunctional tobacco fertilization device according to claim 2, characterized in that, The rotary motor (2) has a cylindrical sliding sleeve (109) inside its through hole, and the limiting rod (108) passes through the sliding sleeve (109).

4. The multifunctional tobacco fertilization device according to claim 1, characterized in that, The bottom of the flatbed vehicle body is also provided with a drill bit position sensing unit that is communicatively connected to the control components. The drill bit position sensing unit includes an infrared transmitter (18) and an infrared receiver (19). The infrared transmitter (18) and the infrared receiver (19) are both located on the lower surface of the flatbed vehicle body and are respectively located on both sides of the drill bit body. The transmitting end of the infrared transmitter (18) is horizontally facing the receiving end of the infrared receiver (19). The infrared transmission path of the infrared transmitter (18) is blocked when the drill bit is lowered to drill, but is not blocked after the drill bit is raised.

5. A multifunctional tobacco fertilization device according to claim 4, characterized in that, The baffle unit (16) of the fertilizer application component includes a baffle drive motor, a screw module and a movable baffle. The baffle drive motor is a stepper motor and is electrically connected to the control component. The movable baffle is connected to the baffle drive motor through the screw module and is driven by the baffle drive motor to achieve lifting and lowering, thereby opening or closing the connection path between the fertilizer delivery pipeline and the fertilizer outlet (17).

6. A multifunctional tobacco fertilization device according to claim 5, characterized in that, The bottom of the fertilizer conveying pipeline is equipped with a weight sensor (15), which is communicatively connected to the control component and sends the weight information of the fertilizer storage box (14) and the fertilizer in the fertilizer conveying pipeline to the control component.

7. A multifunctional tobacco fertilization device according to claim 1, characterized in that, The fertilizer outlet (17) is provided with shaft holes on both sides of the connection between the fertilizer outlet (17) and the fertilizer conveying pipe. A rotating shaft (9) passes through the shaft holes on the fertilizer outlet (17) and the fertilizer conveying pipe to rotate the fertilizer outlet (17) to the fertilizer conveying pipe, so that the fertilizer outlet (17) can change its tilt angle relative to the ground. The rotating shaft (9) is a screw and has a nut on one side, so that the fertilizer outlet (17) can be fixed or its tilt angle can be changed by tightening or loosening the nut.

8. A multifunctional tobacco fertilization device according to claim 1, characterized in that, It also includes two push rods (6) and two handles (7), the bottom of the two push rods (6) being fixed to one side of the upper surface of the flatbed vehicle body, and the top of the push rods (6) being horizontally fixed with handles (7).

9. A multifunctional tobacco fertilization device according to claim 1, characterized in that, The drill bit body includes a drill bit shaft and helical blades. The top of the drill bit shaft is fixed in a rotary motor (2), the bottom of the drill bit shaft is the drill bit tip, and the helical blades are spirally arranged around the middle of the drill bit shaft.

10. A multifunctional tobacco fertilization device according to claim 1, characterized in that, The wheel unit of the moving wheel assembly (10) is a swivel wheel.

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