Unmanned aerial vehicle for pesticide spraying

Abstract

The invention provides a pesticide spraying unmanned aerial vehicle, and particularly relates to the technical field of unmanned aerial vehicles, the pesticide spraying unmanned aerial vehicle comprises an unmanned aerial vehicle main body, the bottom of the unmanned aerial vehicle main body is fixedly connected with a bottom plate, the bottom of the bottom plate is detachably connected with a pesticide liquid box, and the bottoms of the ends, away from the unmanned aerial vehicle main body, of two side plates are fixedly provided with electric telescopic rods; the telescopic end of the electric telescopic rod moves downwards to reduce the spraying height of the fan-shaped spray head, so that the overall flight height of the aircraft does not need to be adjusted in actual spraying operation, and the flight stability is prevented from being influenced by adjustment of the flight height of the aircraft; in this way, the spraying height of the four fan-shaped sprayers arranged under the four driving motors is flexibly reduced, downward-pressing airflow generated when the flying wings rotate is better utilized, the downward-pressing airflow is used for pushing liquid medicine to the surfaces of plants, the penetrating power of the liquid medicine to crops is enhanced, the deposition effect of the liquid medicine is improved, and the spraying efficiency is improved. Therefore, the spraying effect of unmanned flying pesticide spraying is improved.

Description

Technical Field

[0001] The invention provides an unmanned aerial vehicle for spraying pesticides, and particularly relates to the technical field of unmanned aerial vehicles. Background Art

[0002] Pesticide spraying unmanned aerial vehicles, also known as pesticide spraying drones, are widely used in agricultural spraying in agricultural production. They are equipped with an automatic pesticide spraying device on the unmanned aerial vehicle, and the user controls the aircraft through a remote control system to automatically spray pesticides.

[0003] The invention patent with authorization announcement number CN107200130B discloses an intelligent pesticide spraying aircraft and method. The intelligent pesticide spraying aircraft combines image processing technology with drone technology, and uses a camera to detect and identify objects under the aircraft. It can not only monitor the growth of crops, but also achieve intelligent spraying, that is, pesticides will only be sprayed when there are crops under the aircraft. The implementation of intelligent spraying can not only reduce the use of pesticides, but also reduce pollution to the environment.

[0004] However, the intelligent pesticide spraying aircraft has the following deficiencies when used specifically: during the actual spraying operation, the above-mentioned pesticide spraying aircraft will generate crosswinds during outdoor spraying operations. When crosswinds are generated, in order to reduce the impact of crosswinds on the spraying effect, the prior art will lower the flight altitude of the drone to indirectly reduce the spraying altitude. However, there are many unstable factors when adjusting the altitude of the drone, which not only affects the stability of the drone flight, but if the drone directly adjusts the flight altitude to ensure the spraying effect, as the altitude of the drone is too low, the large downward pressure airflow of the wing will excessively sweep the plants, causing the plants to tilt, making it impossible to spray the liquid directly onto the plants, and it will also cause the downward pressure airflow to be unstable, thereby affecting the uniformity of the liquid spraying. It can be seen that the above-mentioned pesticide spraying aircraft lacks the function of flexibly adjusting the height of the liquid spraying, which leads to poor spraying effect during the actual spraying operation, which is not conducive to the plants obtaining the best efficacy of the liquid.

[0005] Therefore, the present invention proposes a pesticide spraying unmanned aerial vehicle to make up for and improve the deficiencies of the prior art. Summary of the invention

[0006] In view of the defects existing in the prior art, the present invention provides an unmanned aerial vehicle for spraying pesticides, which can effectively solve the relevant technical problems raised by the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The invention discloses a pesticide spraying unmanned aerial vehicle, comprising an unmanned aerial vehicle main body, wherein four Y-shaped rods are evenly fixedly arranged on the outer surface of the unmanned aerial vehicle main body, two driving motors are fixedly arranged on the ends of the four Y-shaped rods away from the unmanned aerial vehicle main body, a bottom plate is fixedly connected to the bottom of the unmanned aerial vehicle main body, a medicine liquid tank is detachably connected to the bottom of the bottom plate, a water pump is fixedly arranged on the top surface of the medicine liquid tank, a water inlet pipe is connected to the water inlet end of the water pump, and the water inlet pipe is connected to the inside of the medicine liquid tank, two liquid supply pipes are connected to the water outlet end of the water pump, and fan-shaped spray heads are connected to the ends of the two liquid supply pipes away from the water pump, four fan-shaped spray heads are arranged in total, a transverse pipe is connected between two fan-shaped spray heads, and the four fan-shaped spray heads are located directly below the corresponding driving motors, and active adjustment mechanisms are symmetrically arranged on both sides of the unmanned aerial vehicle main body.

[0009] The active adjustment mechanism includes two side panels symmetrically fixedly connected to the outer walls of both sides of the drone body, the bottom of the two side panels away from the drone body are fixedly installed with electric telescopic rods, the lower telescopic ends of the two electric telescopic rods are fixedly connected with fixed plates, the outer ring surfaces of the two fixed plates are fixedly connected with frame plates, and two rectangular grooves are respectively provided on the sides of the two frame plates away from the fixed plates, and two strip rods are slidably connected to the two rectangular grooves, and the lower ends of the two strip rods are commonly fixedly connected with a vertical rod, and the lower end of the vertical rod is detachably connected to the top of the fan-shaped nozzle.

[0010] Preferably, four positioning holes are evenly arranged on the top surface of the medicine liquid tank, and a positioning plate is fixedly arranged at positions on the bottom surface of the base plate corresponding to the four positioning holes, and the positioning plate is threadedly connected to the positioning holes by screws.

[0011] Preferably, two limit plates are symmetrically arranged at the position where the strip rod and the rectangular groove are slidably matched, and the two limit plates are respectively attached to the upper and lower outer walls of the frame plate.

[0012] Preferably, the outer wall of the lower end of the vertical rod is provided with an external thread, the top of the fan-shaped nozzle is provided with an internal thread hole, and the fan-shaped nozzle is threadedly connected to the external thread of the lower end of the vertical rod through the internal thread hole.

[0013] Preferably, a matching displacement mechanism is symmetrically arranged on one side of the two fixed plates away from the drone body, and the matching displacement mechanism includes a displacement plate fixedly connected to the outer wall of the fixed plate away from the drone body, the top of the displacement plate away from the fixed plate end is fixedly connected to a threaded rod, the outer wall of the electric telescopic rod close to the displacement plate is fixedly connected to a grooved plate, the end of the grooved plate away from the electric telescopic rod is rotatably connected to a synchronous wheel 1, the position of the grooved plate corresponding to the threaded rod is provided with a through hole for the threaded rod to vertically pass through, the threaded rod and the center of the synchronous wheel 1 constitute a ball screw structure, and initially the lower end of the threaded rod passes through the center of the synchronous wheel 1, wherein the bottom center of the two driving motors is rotatably connected to a synchronous wheel 2, the synchronous wheel 2 and the synchronous wheel 1 are transmission-connected by a synchronous belt, a gear ring is fixedly arranged on the bottom outer ring surface of the synchronous wheel 2, and a tooth plate is fixedly connected to the top outer wall of the vertical rod corresponding to the synchronous wheel 2, and the gear ring and the tooth plate are meshed with each other.

[0014] Preferably, the grooved plate is provided with a rectangular hole for the displacement plate to pass through for vertical displacement.

[0015] Preferably, the length of the threaded rod is equal to the telescopic length of the telescopic end of the electric telescopic rod.

[0016] Preferably, the tooth plate consists of a plate body and a plurality of teeth evenly arranged on a surface of the plate body on one side close to the gear ring, and the length of each tooth is equal to the vertical displacement distance of the threaded rod.

[0017] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] The pesticide spraying unmanned aerial vehicle uses an electric telescopic rod to move downward by using the telescopic end of the electric telescopic rod to reduce the spraying height of the fan-shaped nozzle. Therefore, in actual spraying operations, there is no need to adjust the flight height of the entire aircraft, and the adjustment of the flight height of the aircraft to avoid affecting the flight stability, thereby flexibly reducing the spraying height of four fan-shaped nozzles arranged directly below four driving motors, so as to better utilize the downward pressure airflow generated when the flying wing rotates, and use the downward pressure airflow to push the liquid medicine to the surface of the plant, thereby enhancing the penetration of the liquid medicine into the crop and improving the deposition effect of the liquid medicine, thereby improving the spraying effect of the unmanned aerial pesticide spraying;

[0019] The telescopic end of the electric telescopic rod can drive the four fan-shaped nozzles to freely adjust the spraying height of the four fan-shaped nozzles according to the height of different plants during the actual spraying operation, which can not only improve the flexibility and adaptability of the spraying operation, but also better spray the liquid medicine on the plants;

[0020] In the process of lowering the spraying height of the four fan-shaped nozzles, the horizontal distance between the two fan-shaped nozzles can be automatically adjusted through the cooperation of the gear ring, gear plate and other components. Therefore, after the fan-shaped nozzles are lowered, the distance between the two fan-shaped nozzles becomes larger, thereby increasing the coverage area of ​​the fan-shaped nozzles when spraying liquid medicine. This not only ensures the stable spraying effect of the fan-shaped nozzles, but also improves the spraying effect of the fan-shaped nozzles to improve the spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a main perspective structural diagram of the present invention;

[0022] Figure 2 It is a partial three-dimensional structural diagram of the liquid medicine tank and the water pump and related components of the present invention;

[0023] Figure 3 It is a partial three-dimensional structural diagram of the side panels and related parts of the electric telescopic rod of the present invention;

[0024] Figure 4 It is a partial three-dimensional structural diagram of the relevant components of the frame plate of the present invention;

[0025] Figure 5 It is a partial three-dimensional structural diagram of the relevant components of the strip rod of the present invention;

[0026] Figure 6 It is a partial three-dimensional structural diagram of the relevant components of the displacement plate of the present invention;

[0027] Figure 7 It is a partial three-dimensional structural diagram of two related parts of the synchronous wheel of the present invention;

[0028] Figure 8 It is a partial three-dimensional structural diagram of the relevant components of the synchronous belt of the present invention;

[0029] Fig. 9 It is a partially cutaway three-dimensional structural diagram of a connection between a grooved plate and a synchronous wheel according to the present invention.

[0030] The numbers in the figure represent:

[0031] 1. UAV body; 11. Y-shaped rod; 12. driving motor; 13. bottom plate; 14. liquid tank; 15. water pump; 16. liquid supply pipe; 17. fan-shaped nozzle; 171. horizontal pipe;

[0032] Active adjustment mechanism: 21, side plate; 22, electric telescopic rod; 221, fixed plate; 23, frame plate; 24, rectangular groove; 25, strip rod; 26, vertical rod;

[0033] Matching displacement mechanism: 31, displacement plate; 32, threaded rod; 33, grooved plate; 34, synchronous wheel one; 35, synchronous wheel two; 36, synchronous belt; 37, gear ring; 38, gear plate. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the embodiments.

[0035] Embodiment 1: Figure 1 , Figure 2 As shown, a pesticide spraying unmanned aerial vehicle includes a drone body 1, a built-in control system is provided in the drone body 1, and a monitoring sensor for monitoring plant height is also provided on the drone body 1. Four Y-shaped rods 11 are evenly fixedly provided on the outer surface of the drone body 1, and two drive motors 12 are fixedly provided at the ends of the four Y-shaped rods 11 away from the drone body 1. The drive motors 12 are provided with no less than eight in total, and the top output shafts of the eight drive motors 12 are fixedly provided with flying wings. The bottom of the drone body 1 is fixedly connected to a bottom plate 13, and the bottom of the bottom plate 13 is detachably connected to a liquid tank 14, which is used to hold the sprayed liquid, and a liquid filling port is provided on the top surface of the liquid tank 14, and a sealing plug is connected to the liquid filling port. Four positioning holes are evenly arranged on the top surface of the medicine liquid tank 14, and a positioning plate is fixedly arranged on the bottom surface of the bottom plate 13 at positions corresponding to the four positioning holes. The positioning plate and the positioning holes are threadedly connected by screws. When in use, the user can remove the four screws to separate the medicine liquid tank 14 from the bottom plate 13, so that the user can replace the medicine liquid tank 14 or clean the medicine liquid tank 14. A water pump 15 is fixedly arranged on the top surface of the medicine liquid tank 14, and a water inlet pipe is connected to the water inlet end of the water pump 15, and the water inlet pipe is connected to the inside of the medicine liquid tank 14, and two liquid supply pipes 16 are connected to the water outlet end of the water pump 15, and the two liquid supply pipes 16 are connected to fan-shaped nozzles 17 at one end away from the water pump 15. There are four fan-shaped nozzles 17 in total, and a horizontal pipe 171 is connected between two fan-shaped nozzles 17, and the four fan-shaped nozzles 17 are all located directly below the corresponding drive motors 12. Specifically, four of the eight drive motors 12 are provided with corresponding fan-shaped nozzles 17 directly below, and the liquid supply pipe 16 is configured as a hose.

[0036] When in use: the user opens the sealing plug on the liquid medicine box 14 in advance, injects the prepared spray liquid into the liquid medicine box 14, and seals the sealing plug and the liquid filling port after the liquid medicine is filled. Then, the user can control the eight drive motors 12 to start at the same time through the external control system, drive the flying wings to start rotating, and fly the drone body 1 and all the components on the drone body 1 to the area where the liquid medicine needs to be sprayed. When arriving at the spraying area, the water pump 15 is controlled to start through the external control system. The water pump 15 extracts the liquid medicine inside the liquid medicine box 14 through the water inlet pipe, and under the pressurized action of the water pump 15, the liquid medicine is sent to the corresponding two fan-shaped nozzles 17 through the two liquid supply pipes 16, thereby prompting the four fan-shaped nozzles 17 to spray the liquid medicine on the plants, realizing unmanned aerial spraying and spraying of the plants, thereby avoiding the situation of low spraying efficiency caused by manual spraying of the liquid medicine, and improving the effect of liquid medicine spraying.

[0037] As an improvement, Figure 1 , Figures 3 to 5 As shown, active adjustment mechanisms are symmetrically arranged on both sides of the drone body 1, and the active adjustment mechanisms include two side panels 21 symmetrically fixedly connected to the outer walls of both sides of the drone body 1, and the bottoms of the two side panels 21 away from the end of the drone body 1 are fixedly installed with electric telescopic rods 22, and the lower telescopic ends of the two electric telescopic rods 22 are fixedly connected with fixed plates 221, and the outer ring surfaces of the two fixed plates 221 are fixedly connected with frame plates 23, and the two frame plates 23 are respectively provided with two rectangular grooves 24 on one side away from the fixed plates 221, and two strip rods 25 are slidably connected to the two rectangular grooves 24, and two limit plates are symmetrically arranged on the upper and lower parts of the strip rods 25 and the rectangular grooves 24 where they slide together, and the two limit plates are respectively attached to the upper and lower outer walls of the frame plate 23, so that the strip rods 25 can only be horizontally displaced in the rectangular grooves 24. The lower ends of the two strip rods 25 are fixedly connected with a hanging rod 26, the lower end outer wall of the hanging rod 26 is provided with an external thread, the top of the fan-shaped nozzle 17 is provided with an internal thread hole, and the fan-shaped nozzle 17 is threadedly connected with the external thread of the lower end of the hanging rod 26 through the internal thread hole. The lower end of the hanging rod 26 is detachably connected to the top of the fan-shaped nozzle 17.

[0038] When in use: In addition, considering that the liquid medicine sprayed from the fan-shaped nozzle 17 will be affected by the external crosswind during the actual spraying process, resulting in uneven liquid medicine spraying, the prior art generally reduces the height of the sprayed liquid medicine by lowering the flight altitude, thereby reducing the influence of the crosswind on the liquid medicine spraying. During the spraying operation of the pesticide spraying unmanned aerial vehicle, the height of the plants in the spraying area is monitored by the monitoring sensor on the drone body 1, so as to achieve the best spraying effect by adjusting the spraying height of the fan-shaped nozzle 17. At this time, if the spraying height of the fan-shaped nozzle 17 needs to be adjusted, there is no need to adjust the flight altitude of the entire aircraft. Under the condition of maintaining the stable altitude of the aircraft, the telescopic ends of the two electric telescopic rods 22 can be controlled by an external controller to extend downward, thereby driving the fixed plate 221 and the frame plate 23 to move downward synchronously, and then the frame plate 23, the rectangular groove 24, and the strip rod 25 drive the vertical rod 26 to move downward synchronously, thereby realizing the synchronous downward movement of the four vertical rods 26 and the corresponding four fan-shaped nozzles 17. After moving downward to the desired height, the telescopic end of the electric telescopic rod 22 can be kept at the current position through the external controller. Therefore, by setting the electric telescopic rod 22, the telescopic end of the electric telescopic rod 22 moves downward to reduce the spraying height of the fan-shaped nozzle 17, so that in the actual spraying operation, there is no need to adjust the flight height of the aircraft as a whole, and avoid adjusting the flight height of the aircraft to affect the flight stability, so as to flexibly reduce the spraying height of the four fan-shaped nozzles 17 set directly below the four driving motors 12, so as to better utilize the downward pressure airflow generated when the flying wing rotates, and use the downward pressure airflow to push the liquid medicine to the surface of the plant, thereby enhancing the penetration of the liquid medicine into the crop and improving the deposition effect of the liquid medicine, thereby improving the spraying effect of the unmanned aerial spraying.

[0039] At the same time, the telescopic end of the electric telescopic rod 22 can drive the four fan-shaped nozzles 17 to freely adjust the spraying height of the four fan-shaped nozzles 17 according to the height of different plants during the actual spraying operation, which can not only improve the flexibility and adaptability during the spraying operation, but also better spray the liquid medicine on the plants.

[0040] Embodiment 2: Figure 1 , Figures 6 to 9As shown, the above-mentioned pesticide spraying unmanned aerial vehicle also includes a matching displacement mechanism symmetrically arranged on the side of the two fixed plates 221 away from the drone body 1, and the matching displacement mechanism includes a displacement plate 31 fixedly connected to the outer wall of the fixed plate 221 away from the drone body 1. The top of the displacement plate 31 away from the fixed plate 221 is fixedly connected with a threaded rod 32, and the length of the threaded rod 32 is equal to the telescopic length of the telescopic end of the electric telescopic rod 22, that is, when the telescopic end of the electric telescopic rod 22 extends downward to the maximum length, the threaded rod 32 also moves to the maximum distance. A grooved plate 33 is fixedly connected to the outer wall of the electric telescopic rod 22 close to the displacement plate 31, and the grooved plate 33 is fixed to the outer wall of the fixed end of the electric telescopic rod 22. A rectangular hole is opened on the grooved plate 33 for the displacement plate 31 to pass through for vertical displacement. One end of the grooved plate 33 away from the electric telescopic rod 22 is rotatably connected to a synchronous wheel 1 34, and a through hole for the threaded rod 32 to vertically pass through is provided at a position of the grooved plate 33 corresponding to the threaded rod 32. The threaded rod 32 and the center of the synchronous wheel 1 34 form a ball screw structure, and initially the lower end of the threaded rod 32 passes through the center of the synchronous wheel 1 34, wherein the bottom centers of the two drive motors 12 are rotatably connected to a synchronous wheel 2 35. Specifically, there are two synchronous wheels 2 35, and the two synchronous wheels 2 35 rotate at the bottom centers of the corresponding drive motors 12 respectively. A synchronous belt 36 is provided for transmission connection between the adjacent synchronous wheel 2 35 and the synchronous wheel 1 34. A gear ring 37 is fixedly provided on the bottom outer ring surface of the synchronous wheel 2 35. A tooth plate 38 is fixedly connected to the top outer wall of the vertical rod 26 corresponding to the synchronous wheel 2 35. The tooth plate 38 consists of a plate body and a plurality of long teeth evenly provided on the surface of one side of the plate body close to the gear ring 37. The length of each long tooth is equal to the vertical displacement distance of the threaded rod 32. Initially, the gear ring 37 is engaged with the bottom of the plurality of long teeth. That is to say, when the threaded rod 32 moves down to the final position, the long teeth on the tooth plate 38 are still engaged with the gear ring 37. In the process that the tooth plate 38 follows the above-mentioned vertical rod 26 to move down, the long teeth are always engaged with the gear ring 37.

[0041] When in use: to enhance the effect of spraying the liquid medicine on the plants by the four fan-shaped nozzles 17. In the above-mentioned embodiment 1, when the telescopic end of the electric telescopic rod 22 drives the fixed plate 221 to move downward, it also drives the two displacement plates 31 and the two threaded rods 32 to move downward synchronously. As the two threaded rods 32 move downward, they drive the corresponding synchronous wheel 1 34 to rotate counterclockwise. Note: The rotation direction can be referred to Figure 6As shown. With the rotation of synchronous wheel 1 34, synchronous belt 36 drives synchronous wheel 2 35 and gear ring 37 to rotate synchronously. With the counterclockwise rotation of gear ring 37, tooth plate 38 will gradually move horizontally in the direction away from the drone body 1 under the limiting effect of rectangular groove 24, thereby driving the fan-shaped nozzle 17 corresponding to tooth plate 38 to move horizontally synchronously. After the horizontal movement of fan-shaped nozzle 17, it will drive another fan-shaped nozzle 17 to move synchronously through transverse tube 171. In this way, the two fan-shaped nozzles 17 on the same side of transverse tube 171 can both move horizontally in the direction away from the drone body 1, that is, the two fan-shaped nozzles 17 move horizontally away from each other. When the telescopic end of the electric telescopic rod 22 moves upward, it will drive synchronous wheel 1 34 to rotate in the opposite direction through threaded rod 32, thereby driving tooth plate 38 and two fan-shaped nozzles 17 to move horizontally towards each other through gear ring 37. Therefore, in the process of lowering the spraying height of the four fan-shaped nozzles 17, the horizontal distance between the two fan-shaped nozzles 17 can be automatically adjusted by the cooperation of the gear ring 37, the tooth plate 38 and other components, so that after the fan-shaped nozzle 17 is lowered, the distance between the two fan-shaped nozzles 17 becomes larger, thereby increasing the coverage area when the fan-shaped nozzle 17 sprays the liquid medicine. This can not only ensure the stable spraying effect of the fan-shaped nozzle 17, but also improve the spraying effect of the fan-shaped nozzle 17 liquid medicine to improve the spraying efficiency. In addition, the adjustment of the horizontal distance between two of the four fan-shaped nozzles 17 can be coordinated and adapted with the adjustment of the upper and lower heights of the fan-shaped nozzles 17, thereby further improving the flexibility during the spraying operation.

[0042] As a supplement: in the process of the upward and downward movement of the above-mentioned threaded rod 32 driving the synchronous wheel 34 to rotate forward and reverse, and finally realizing the horizontal distance adjustment between two fan-shaped nozzles 17 among the four fan-shaped nozzles 17, the four fan-shaped nozzles 17 are always located within the range of the downward pressure airflow generated when the flying wing rotates on the driving motor 12, so as to ensure that the fan-shaped nozzle 17 can always be assisted by the downward pressure airflow of the flying wing when spraying the liquid medicine.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pesticide spraying unmanned aerial vehicle, comprising an unmanned aerial vehicle body (1), characterized in that: Four Y-shaped rods (11) are evenly and fixedly arranged on the outer surface of the drone body (1), and two driving motors (12) are fixedly arranged at one end of the four Y-shaped rods (11) away from the drone body (1). A bottom plate (13) is fixedly connected to the bottom of the drone body (1), and a liquid medicine tank (14) is detachably connected to the bottom of the bottom plate (13). A water pump (15) is fixedly arranged on the top surface of the liquid medicine tank (14), and a water inlet pipe is arranged on the water inlet end of the water pump (15), and the water inlet pipe is connected to the liquid medicine tank (14). The interior of the box (14) is connected, two liquid supply pipes (16) are connected to the water outlet end of the water pump (15), and the ends of the two liquid supply pipes (16) away from the water pump (15) are connected to fan-shaped nozzles (17), a total of four fan-shaped nozzles (17) are provided, and a horizontal pipe (171) is connected between two fan-shaped nozzles (17), and the four fan-shaped nozzles (17) are located directly below the corresponding drive motors (12), and active adjustment mechanisms are symmetrically provided on both sides of the drone body (1); The active adjustment mechanism comprises two side panels (21) symmetrically fixedly connected to the outer walls of both sides of the drone body (1); the bottom of the two side panels (21) away from the drone body (1) is fixedly installed with an electric telescopic rod (22); the lower telescopic ends of the two electric telescopic rods (22) are fixedly connected with a fixed plate (221); the outer ring surfaces of the two fixed plates (221) are fixedly connected with a frame plate (23); the two sides of the two frame plates (23) away from the fixed plate (221) are respectively provided with two rectangular grooves (24); the two rectangular grooves (24) are slidably connected with two strip rods (25); the lower ends of the two strip rods (25) are commonly fixedly connected with a vertical rod (26); the lower end of the vertical rod (26) is detachably connected to the top of the fan-shaped nozzle (17).

2. The pesticide spraying unmanned aerial vehicle according to claim 1, characterized in that: The top surface of the liquid medicine box (14) is evenly provided with four positioning holes, and a positioning plate is fixedly provided at positions on the bottom surface of the bottom plate (13) corresponding to the four positioning holes, and the positioning plate is threadedly connected to the positioning holes via screws.

3. The pesticide spraying unmanned aerial vehicle according to claim 1, characterized in that: Two limit plates are symmetrically arranged at the position where the strip rod (25) and the rectangular groove (24) are slidably matched, and the two limit plates are respectively attached to the upper and lower outer walls of the frame plate (23).

4. The pesticide spraying unmanned aerial vehicle according to claim 1, characterized in that: The outer wall of the lower end of the vertical rod (26) is provided with an external thread, and the top of the fan-shaped spray head (17) is provided with an internal thread hole. The fan-shaped spray head (17) is threadedly connected to the external thread of the lower end of the vertical rod (26) through the internal thread hole.

5. The pesticide spraying unmanned aerial vehicle according to claim 1, characterized in that: A matching displacement mechanism is symmetrically arranged on one side of the two fixed plates (221) away from the drone body (1), and the matching displacement mechanism comprises a displacement plate (31) fixedly connected to the outer wall of the fixed plate (221) away from the drone body (1), and a threaded rod (32) is fixedly connected to the top of one end of the displacement plate (31) away from the fixed plate (221), and a grooved plate (33) is fixedly connected to the outer wall of the electric telescopic rod (22) close to the displacement plate (31), and one end of the grooved plate (33) away from the electric telescopic rod (22) is rotatably connected to a synchronous wheel (34), and a position of the grooved plate (33) corresponding to the threaded rod (32) is provided with a threaded rod (32) for the threaded rod (32) to rotate. 2) a through hole passing vertically therethrough, the threaded rod (32) and the center of the synchronous wheel one (34) form a ball screw structure, and initially the lower end of the threaded rod (32) passes through the center of the synchronous wheel one (34), wherein the bottom centers of the two driving motors (12) are rotatably connected with a synchronous wheel two (35), a synchronous belt (36) is transmission-connected between the synchronous wheel two (35) and the synchronous wheel one (34), a gear ring (37) is fixedly provided on the bottom outer ring surface of the synchronous wheel two (35), a toothed plate (38) is fixedly connected to the top outer wall of the vertical rod (26) corresponding to the synchronous wheel two (35), and the gear ring (37) and the toothed plate (38) are meshed with each other.

6. The pesticide spraying unmanned aerial vehicle according to claim 5, characterized in that: The grooved plate (33) is provided with a rectangular hole through which the displacement plate (31) can vertically displace.

7. The pesticide spraying unmanned aerial vehicle according to claim 5, characterized in that: The length of the threaded rod (32) is equal to the telescopic length of the telescopic end of the electric telescopic rod (22).

8. The pesticide spraying unmanned aerial vehicle according to claim 5, characterized in that: The tooth plate (38) is composed of a plate body and a plurality of teeth evenly arranged on the surface of one side of the plate body close to the tooth ring (37), and the length of each tooth is equal to the vertical displacement distance of the threaded rod (32).

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