Unmanned aerial vehicle pesticide spraying device for cherry trees

Abstract

The invention relates to the technical field of agricultural machinery, and discloses an unmanned aerial vehicle pesticide spraying device for cherry trees, the unmanned aerial vehicle pesticide spraying device comprises a main machine body, a rack arranged on the periphery of the main machine body, a supporting seat fixed to the rack and a spraying mechanism arranged on the main machine body, the spraying mechanism comprises a box body arranged on the main machine body, and a high-pressure pump is arranged in the box body; a spray head assembly is arranged below each group of supporting seats, a follow-up mechanism is further arranged below each group of supporting seats, the follow-up mechanisms are used for detecting strong wind blown by the side edge of the unmanned aerial vehicle, and when the follow-up mechanisms detect the strong wind on the side edge, the spray head assemblies are controlled to rotate in the blowing direction of the strong wind, and the spraying direction of the spray head assemblies is adjusted; the follow-up mechanism is used for sensing strong wind and immediately adjusting the spray head assembly to rotate towards the blowing direction of the strong wind, so that the deviation degree of a pesticide spraying path is reduced to a certain extent because pesticide which is originally blown to be deflected by the strong wind on the side is close to the blowing direction of the strong wind, spraying deviation caused by the wind is reduced, and waste of the pesticide is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to an unmanned aerial vehicle pesticide spraying device for cherry trees. Background Art

[0002] With the rapid development of agricultural modernization, drones, as a new type of pesticide spraying tool, have gradually been widely used in the management of various crops, especially in the planting of cherry trees. Drones have been widely used due to their high efficiency and speed. Drones are equipped with spraying systems, sensors and navigation systems. They can quickly cover large areas of orchards, thereby realizing accurate and efficient pesticide spraying operations.

[0003] A multifunctional pesticide spraying UAV equipment disclosed in the existing publication number CN113232835A includes a UAV body, a box, a balancing mechanism and a spraying mechanism; wherein the box is installed below the UAV body, the balancing mechanism is installed inside the box, the balancing mechanism includes a balancing plate, the inside of the balancing plate is rotatably connected to a fixed rod, and one end of the fixed rod is rotatably connected to the inside of the box.

[0004] Although the above technical solution can reduce the shaking of the medicine in the medicine storage box and maintain the stability of the box by using a balancing mechanism, and has the advantage of improving the balancing effect of the UAV body, in the prior art, during actual operation, the flight path of the UAV is usually set to a fixed mode to ensure that the spraying coverage is maximized. When the UAV is flying, the pesticide liquid is evenly sprayed downward through the nozzle in the form of a spray to achieve the best prevention and control effect. However, due to the instability of the wind direction in the air, especially when strong winds blow from the side of the UAV, the path of the spraying liquid will be offset. The deviation of the liquid will cause the pesticide originally planned to be sprayed on the cherry tree to be blown to other areas, thereby causing a waste of liquid, resulting in a significant reduction in the spraying effect, and even causing some areas to fail to achieve the desired prevention and control effect. Therefore, a new type of UAV pesticide spraying device for cherry trees is needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a drone pesticide spraying device for cherry trees to solve the problem proposed in the above background technology that when the drone is flying, when strong wind blows from the side of the drone, the path of the spraying liquid will be offset, resulting in poor spraying effect and waste of liquid.

[0006] The present invention provides a drone pesticide spraying device for cherry trees, which adopts the following technical solution: A drone pesticide spraying device for cherry trees, comprising a main body, a frame arranged around the main body, a support seat fixed to the frame, a rotor mechanism arranged on the support seat, and a spraying mechanism arranged on the main body, wherein the spraying mechanism comprises a box body arranged on the main body, a high-pressure pump is arranged in the box body, a nozzle assembly is arranged below each group of the support seats, the high-pressure pump is used to extract the liquid medicine in the box body and pump it into the nozzle assembly to realize spraying, wherein each group of the nozzle assembly is connected with a pipeline, the other end of the pipeline is detachably connected with a bellows, the other end of the bellows is detachably connected with an infusion tube, the other end of the infusion tube passes through the support seat and the frame in sequence, and is connected with the output end of the high-pressure pump, a protective cover is fixed below each group of the support seats, and the pipeline, the bellows and the infusion tube are all arranged in the protective cover; A follow-up mechanism is also provided under each group of the support seats, and the follow-up mechanism is used to detect strong wind blowing from the side of the drone. When the follow-up mechanism detects strong wind from the side, it controls the nozzle assembly to rotate in the direction of the strong wind and adjusts the spraying direction of the nozzle assembly.

[0007] Further, the follower mechanism includes a main shaft rotatably arranged below the support seat, a connecting shaft fixed on the main shaft, a wind measuring vane fixedly connected to the connecting shaft, a first bevel gear fixed on the main shaft, and a fixed ring fixedly sleeved outside the pipeline, the fixed ring is rotatably arranged in the protective cover through a shaft rod, one end of the shaft rod passes through the protective cover and is fixed with a second bevel gear, the second bevel gear is meshed and connected with the first bevel gear, and the other end of the shaft rod passes through the outside of the protective cover and is provided with a first torsion spring; When the wind measuring wing contacts the strong wind at the side of the UAV, the wind measuring wing is deflected by the wind force, driving the main shaft to rotate, thereby controlling the shaft, fixing ring, pipeline and nozzle assembly to rotate in the direction of the strong wind.

[0008] Further, the nozzle assembly includes a first nozzle and a second nozzle rotatably sleeved outside the first nozzle, the first nozzle is connected to the pipeline, a plurality of groups of liquid outlet holes are provided on the first nozzle, the second nozzle is provided with the same number of first liquid injection holes and one-to-one corresponding to the liquid outlet holes, wherein the aperture of the first liquid injection hole is smaller than the liquid outlet hole, and the second nozzle is further provided with a plurality of groups of second liquid injection holes corresponding to the liquid outlet holes, wherein the aperture of the second liquid injection hole is the same as the aperture of the liquid outlet hole; The second nozzle is provided with an adjustment mechanism. When the nozzle assembly rotates in the direction of strong wind, the adjustment mechanism controls the second nozzle to rotate outside the first nozzle, so that the second spray hole corresponds to the liquid outlet hole, so that the liquid medicine is sprayed through the second spray hole to produce larger droplets.

[0009] Furthermore, the adjustment mechanism includes a crown gear fixed on the second nozzle, a spur gear meshing with the crown gear, an arc-shaped rack plate meshing with the spur gear, and a connecting plate fixed between the arc-shaped rack plate and the protective cover.

[0010] Furthermore, a fixing frame is fixed outside the pipeline, and the spur gear is rotatably connected to the fixing frame via a rotating shaft, and a second torsion spring is also provided on the rotating shaft.

[0011] Furthermore, the wind measuring wing is horizontally arranged along the flight direction of the UAV, and the wind measuring wing is a flat plate-like structure.

[0012] Furthermore, a limiting frame for limiting the connection shaft is symmetrically fixed on the support seat.

[0013] Furthermore, the bottom end of the protective cover is symmetrically provided with slots for the pipe to rotate; A bracket is fixed outside the protective cover, and the main shaft and the bracket are rotatably connected via a bearing.

[0014] Furthermore, protruding rods for limiting the position of the spur gear are symmetrically fixed to both ends of the arc-shaped rack plate.

[0015] Furthermore, the main body is also provided with sensors, batteries, a navigation system and a pest and disease identification system.

[0016] Beneficial effects of the present invention: By setting up a spraying mechanism, a protective cover and a follow-up mechanism, since strong winds at the side of the drone will cause the path of the spraying liquid by the nozzle assembly to deviate, the follow-up mechanism is used to sense the strong wind and instantly adjust the nozzle assembly to rotate in the direction of the strong wind. As a result, the liquid that would have been blown off by the strong side wind can be closer to the direction of the strong wind, and the degree of deviation of the spraying liquid path can be reduced to a certain extent, thereby reducing the spraying deviation caused by the wind, helping the liquid to settle to the target area more accurately, reducing the risk of deviation, and thus reducing the waste of liquid medicine.

[0017] By setting up a nozzle assembly and an adjusting mechanism, when the nozzle assembly rotates in the direction of strong wind, the adjusting mechanism controls the second nozzle to rotate outside the first nozzle, so that the second spray hole and the liquid outlet hole correspond to each other, so that the medicine forms more obvious droplets through the second spray hole. Therefore, during the spraying process, the influence of strong side wind on the medicine can be reduced, thereby making it easier to control the path of the spraying medicine and reduce the waste of the medicine. When the droplets are large, the sedimentation speed is fast, which further reduces the time the medicine floats in the air and reduces the drift loss of the medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the frame, support base, rotor mechanism, protective cover and follower mechanism of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of a side structural cross-section; Figure 4 For the present invention Figure 2 A schematic cross-sectional view of the three-dimensional structure at the middle protective cover; Figure 5 It is a schematic diagram of the three-dimensional structure of the protective cover of the present invention; Figure 6 It is a schematic diagram of the exploded three-dimensional structure of the nozzle assembly, pipeline, bellows and infusion tube of the present invention; Figure 7 It is an exploded schematic diagram of the three-dimensional structure of the second nozzle, the first nozzle and the pipeline of the present invention; Figure 8 For the present invention Figure 4 Schematic diagram of the three-dimensional structure of the middle pipeline and the regulating mechanism; Fig. 9 For the present invention Figure 8 A schematic diagram of the structure at point A; Fig.10 It is a schematic cross-sectional view of the three-dimensional structure of the nozzle assembly and the pipeline of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the nozzle assembly and the wind measuring vane of the present invention in a rotating state; Fig.12 It is a schematic diagram of the structure of the nozzle assembly and the wind measuring vane of the present invention in a rotating state when viewed from above.

[0019] In the figure: 1. Main body; 2. Frame; 3. Support seat; 31. Limiting frame; 4. Rotor mechanism; 5. Spraying mechanism; 51. Box; 52. Spray head assembly; 521. First spray head; 5211. Liquid outlet; 522. Second spray head; 5221. First liquid outlet; 5222. Second liquid outlet; 53. Pipe; 531. Fixing frame; 54. Bellows; 55. Infusion tube; 6. Protective cover; 6 1. slot; 62. bracket; 7. follow-up mechanism; 71. main shaft; 72. connecting shaft; 73. wind measuring wing; 74. first bevel gear; 75. fixing ring; 76. shaft; 761. first torsion spring; 77. second bevel gear; 8. adjusting mechanism; 81. crown gear; 82. spur gear; 821. rotating shaft; 822. second torsion spring; 83. arc-shaped rack plate; 831. convex rod; 84. connecting plate. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] Reference Figure 1-Figure 3 A drone pesticide spraying device for cherry trees comprises a main body 1, a frame 2 arranged around the main body 1, a support seat 3 fixed to the frame 2, a rotor mechanism 4 arranged on the support seat 3, and a spraying mechanism 5 arranged on the main body 1, wherein the spraying mechanism 5 comprises a box body 51 arranged on the main body 1, a high-pressure pump is arranged in the box body 51, and a nozzle assembly 52 is arranged under each group of support seats 3, and the high-pressure pump is used to extract the liquid in the box body 51 and pump it into the nozzle assembly 52 for spraying, wherein each group of nozzle assemblies 52 is connected with a pipe 53, and the other end of the pipe 53 is detachably connected with a bellows 54, and the other end of the bellows 54 is detachably connected with a liquid infusion pipe 55, and the detachable connection mode is through a threaded connection, and specific reference may be made to the drawings in the specification. Figure 6 The other end of the infusion tube 55 passes through the support base 3 and the frame 2 in sequence, and is connected to the output end of the high-pressure pump, and the infusion tube 55 is fixedly connected to the support base 3; Specifically, the main body 1 is also provided with sensors, batteries, navigation systems and pest identification systems, wherein the sensor is an ultrasonic sensor, which is used to measure the distance between the UAV and the ground in real time to ensure that the appropriate height is maintained during spraying; the pest identification system is a high-definition camera, which is used for image acquisition and can obtain high-definition images of crops to help identify the appearance characteristics and symptoms of pests and diseases and perform visual inspection; the navigation system is a GPS, which provides real-time positioning information, so that the UAV can accurately determine its position in three-dimensional space, and perform path planning and track tracking; the battery serves as the main power source of the UAV, providing power to the sensors, navigation system and pest identification system required for flight.

[0022] Reference Figure 3 A protective cover 6 is fixed under each support seat 3, and the pipeline 53, the bellows 54 and the infusion tube 55 are all arranged in the protective cover 6; Reference Figure 2-Figure 5 A follow-up mechanism 7 is also provided under each group of support seats 3. The follow-up mechanism 7 is used to detect strong wind blowing from the side of the drone. When the follow-up mechanism 7 detects strong wind from the side, it controls the nozzle assembly 52 to rotate in the direction of the strong wind to adjust the spraying direction of the nozzle assembly 52.

[0023] Specifically, the follower mechanism 7 includes a main shaft 71 rotatably arranged under the support seat 3, a connecting shaft 72 fixed on the main shaft 71, a wind measuring wing 73 fixedly connected to the connecting shaft 72, a first bevel gear 74 fixed on the main shaft 71, and a fixing ring 75 fixedly sleeved on the outside of the pipeline 53. The fixing ring 75 is rotatably arranged in the protective cover 6 through an axle rod 76. One end of the axle rod 76 passes through the protective cover 6 and is fixed with a second bevel gear 77. The second bevel gear 77 is meshed and connected with the first bevel gear 74. The other end of the axle rod 76 passes through the outside of the protective cover 6 and is provided with a first torsion spring 761. The first torsion spring 761 is wound around the other end of the axle rod 76, and the two ends of the first torsion spring 761 are respectively fixed between the axle rod 76 and the protective cover 6.

[0024] The bottom end of the protective cover 6 is symmetrically provided with slots 61 for the pipe 53 to rotate. The slots 61 are used to limit the rotation angle of the pipe 53 to ensure that the spray head assembly 52 can stably spray the liquid medicine.

[0025] A bracket 62 is fixed outside the protective cover 6 , and the main shaft 71 and the bracket 62 are rotatably connected via a bearing. The bracket 62 is used to support the main shaft 71 to improve the stability of the main shaft 71 during rotation.

[0026] When the wind measuring wing 73 comes into contact with the strong wind at the side of the drone, the wind measuring wing 73 is deflected by the wind, driving the main shaft 71 to rotate. When the main shaft 71 rotates, the first bevel gear 74 is controlled to drive the second bevel gear 77 to rotate, thereby controlling the shaft 76, the fixing ring 75, the pipeline 53 and the nozzle assembly 52 to rotate in the direction of the strong wind. Since the strong wind at the side of the drone may cause the path of the nozzle assembly 52 to spray the liquid medicine to deviate, the follow-up mechanism 7 is used to sense the strong wind and instantly adjust the nozzle assembly 52 to rotate in the direction of the strong wind. This can reduce the degree of deviation of the spraying liquid path to a certain extent, reduce the spraying deviation caused by the wind, and thus help the spraying liquid to effectively cover the target area and reduce the waste of liquid medicine.

[0027] Among them, the wind measuring wing 73 is horizontally arranged along the flight direction of the UAV. During the flight of the UAV, the wind measuring wing 73 can sense the strong wind on the side of the UAV. Specifically, the wind measuring wing 73 is a flat plate-like structure. By setting the wind measuring wing 73 as a flat plate-like structure, the wind receiving area can be expanded and the sensing sensitivity can be improved.

[0028] Furthermore, a limit frame 31 for limiting the connecting shaft 72 is symmetrically fixed on the support seat 3. When the connecting shaft 72 rotates with the swing of the wind measuring wing 73, the setting of the limit frame 31 can limit the connecting shaft 72. That is, when the wind measuring wing 73 swings when encountering strong side wind, the connecting shaft 72 rotates and contacts the limit frame 31. As the strong wind continues to blow, the connecting shaft 72 can continue to abut against the limit frame 31. At this time, the spraying direction of the nozzle assembly 52 is adjusted and spraying is achieved. When the wind stops, the nozzle assembly 52 is reset by controlling the torque of the first torsion spring 761, thereby resetting the wind measuring wing 73.

[0029] During use: When the drone is spraying pesticides during flight, the liquid medicine in the box 51 is extracted by a high-pressure pump, and the liquid medicine is pumped into the nozzle assembly 52 through the infusion tube 55, the bellows 54 and the pipe 53 for spraying. When the drone encounters strong winds on the side during flight, the strong wind contacts the wind measuring wing 73 and controls the wind measuring wing 73 to swing. After the wind measuring wing 73 swings, it controls the connecting shaft 72, the main shaft 71 and the first bevel gear 74 to rotate. The meshing connection between the first bevel gear 74 and the second bevel gear 77 is used to make the second bevel gear 77 control the shaft rod 76 to rotate, thereby making the fixing ring 75 and the pipe 53 rotate with the shaft rod 76 as the center point, so that the nozzle assembly 52 rotates in the direction of the strong wind to adjust the spraying direction of the nozzle assembly 52. ​​For details, please refer to the drawings in the specification. Figure 11-Figure 12 When the nozzle assembly 52 and the pipe 53 rotate at the same time, the bellows 54 can be deformed to adapt to the rotation of the pipe 53 and the nozzle assembly 52.

[0030] Further, refer to Figure 7-10 The nozzle assembly 52 includes a first nozzle 521 and a second nozzle 522 rotatably sleeved outside the first nozzle 521. The first nozzle 521 is connected to the pipeline 53. The first nozzle 521 is provided with a plurality of groups of liquid outlet holes 5211. The second nozzle 522 is provided with first liquid spray holes 5221 which are the same in number and correspond to the liquid outlet holes 5211. The aperture of the first liquid spray hole 5221 is smaller than that of the liquid outlet hole 5211. The first liquid spray hole 5221 with a small aperture can atomize the liquid medicine into tiny droplets and spray them out. When the spray is formed into a mist-like spray, the surface of the target object can be better covered. The second nozzle 522 is also provided with a plurality of second spray holes 5222 corresponding to the liquid outlet holes 5211, wherein the aperture of the second spray holes 5222 is the same as that of the liquid outlet holes 5211. Compared with the first spray holes 5221 with a small aperture, the liquid sprayed from the second spray holes 5222 with a large aperture will form more obvious droplets. When the droplets are larger, the sedimentation speed of the sprayed liquid in the air is also higher, and the liquid will quickly fall onto the surface of the target object. Specifically, refer to Figure 8-Figure 9The second nozzle 522 is provided with an adjustment mechanism 8, which includes a crown gear 81 fixed on the second nozzle 522, a spur gear 82 meshing with the crown gear 81, an arc-shaped rack plate 83 meshing with the spur gear 82, and a connecting plate 84 fixed between the arc-shaped rack plate 83 and the protective cover 6. When the nozzle assembly 52 rotates in the direction of the strong wind, the adjustment mechanism 8 can simultaneously control the second nozzle 522 to rotate outside the first nozzle 521, thereby making the first spray hole 522 originally corresponding to the liquid outlet hole 5211 1. The second liquid spray hole 5222 is no longer corresponding to the liquid outlet hole 5211, but the second liquid spray hole 5222 is corresponding to the liquid outlet hole 5211. At this time, the liquid medicine is sprayed through the second liquid spray hole 5222 to form larger droplets. Since the liquid medicine will form more obvious droplets when it is sprayed through the second liquid spray hole 5222, the impact of strong side wind on the liquid medicine can be reduced during the spraying process, so that it is easier to control the path of the sprayed liquid medicine, reduce the waste of the liquid medicine, and the sedimentation speed is fast when the droplets are large, which further reduces the time the liquid medicine floats in the air and reduces the drift loss of the liquid medicine.

[0031] Among them, a fixing frame 531 is fixed outside the pipeline 53, and the spur gear 82 is rotatably connected to the fixing frame 531 through a rotating shaft 821. A second torsion spring 822 is also provided on the rotating shaft 821. The second torsion spring 822 is wound around the rotating shaft 821, and the two ends of the second torsion spring 822 are respectively fixed on the fixing frame 531 and the rotating shaft 821. By utilizing the torque control of the second torsion spring 822, the second nozzle 522 can be controlled to reset when the nozzle assembly 52 is reset, so that the first spray hole 5221 and the liquid outlet hole 5211 correspond to each other.

[0032] Protruding rods 831 for limiting the spur gear 82 are symmetrically fixed at both ends of the arc-shaped rack plate 83. The protruding rods 831 can limit the rotation of the spur gear 82, so that the second spray hole 5222 can correspond to the liquid outlet hole 5211.

[0033] During use, when the nozzle assembly 52 rotates in the direction of strong wind, please refer to the figure in the specification for details. Figure 11-Figure 12 , the pipe 53 can drive the spur gear 82 to rotate synchronously under the action of the fixing frame 531 and the rotating shaft 821. As the spur gear 82 is meshed and connected with the arc-shaped rack plate 83, the spur gear 82 can rotate around the rotating shaft 821 and control the crown gear 81 to rotate, thereby controlling the second nozzle 522 to rotate outside the first nozzle 521, so that the first spray hole 5221 originally corresponding to the liquid outlet hole 5211 no longer corresponds to the liquid outlet hole 5211, but the second spray hole 5222 corresponds to the liquid outlet hole 5211. At this time, the liquid medicine is sprayed through the second spray hole 5222 with a large aperture to produce larger droplets, thereby reducing the drift loss of the liquid medicine; When the nozzle assembly 52 is reset, the spur gear 82 rotates with the reset of the pipe 53, still meshing with the arc-shaped rack plate 83 and reversing, and under the torsion of the second torsion spring 822, the spur gear 82 is controlled to drive the crown gear 81 and the second nozzle 522 to reset, so that the first spray hole 5221 corresponds to the liquid outlet hole 5211 again, so that the liquid passes through the small-aperture first spray hole 5221 and is atomized into tiny droplets to better cover the surface of the target object.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A drone pesticide spraying device for cherry trees, comprising a main body (1), a frame (2) arranged around the main body (1), a support base (3) fixed to the frame (2), a rotor mechanism (4) arranged on the support base (3), and a spraying mechanism (5) arranged on the main body (1), wherein the spraying mechanism (5) comprises a box (51) arranged on the main body (1), a high-pressure pump is arranged in the box (51), and a nozzle assembly (52) is arranged under each group of the support bases (3), wherein the high-pressure pump is used to extract the liquid medicine in the box (51) and pump it into the nozzle assembly (52) to achieve spraying, wherein: Each group of nozzle assemblies (52) is connected to a pipe (53), the other end of the pipe (53) is detachably connected to a bellows (54), the other end of the bellows (54) is detachably connected to an infusion pipe (55), the other end of the infusion pipe (55) passes through the support seat (3) and the frame (2) in sequence, and is connected to the output end of the high-pressure pump, characterized in that a protective cover (6) is fixed below each group of the support seat (3), and the pipe (53), the bellows (54) and the infusion pipe (55) are all arranged in the protective cover (6); A follow-up mechanism (7) is also provided below each group of the support seats (3). The follow-up mechanism (7) is used to detect strong wind blowing past the side of the drone. When the follow-up mechanism (7) detects strong wind at the side, it controls the nozzle assembly (52) to rotate in the direction of the strong wind, thereby adjusting the spraying direction of the nozzle assembly (52).

2. The drone pesticide spraying device for cherry trees according to claim 1 is characterized in that: The follower mechanism (7) comprises a main shaft (71) rotatably arranged below the support seat (3), a connecting shaft (72) fixed on the main shaft (71), a wind measuring vane (73) fixedly connected to the connecting shaft (72), a first bevel gear (74) fixed on the main shaft (71), and a fixing ring (75) fixedly sleeved on the outside of the pipe (53); the fixing ring (75) is rotatably arranged in the protective cover (6) via a shaft (76); one end of the shaft (76) passes through the protective cover (6) and is fixed with a second bevel gear (77); the second bevel gear (77) is meshedly connected with the first bevel gear (74); the other end of the shaft (76) passes through the outside of the protective cover (6) and is provided with a first torsion spring (761); When the wind measuring wing (73) contacts the strong wind at the side of the drone, the wind measuring wing (73) is deflected by the wind force, driving the main shaft (71) to rotate, thereby controlling the shaft (76), the fixing ring (75), the pipe (53) and the nozzle assembly (52) to rotate in the direction of the strong wind.

3. The drone pesticide spraying device for cherry trees according to claim 2 is characterized in that: The nozzle assembly (52) comprises a first nozzle (521) and a second nozzle (522) rotatably sleeved outside the first nozzle (521), the first nozzle (521) being in through-connection with a pipeline (53), the first nozzle (521) being provided with a plurality of groups of liquid outlet holes (5211), the second nozzle (522) being provided with first liquid injection holes (5221) the same number as the liquid outlet holes (5211) and corresponding one to one, wherein the aperture of the first liquid injection holes (5221) is smaller than that of the liquid outlet holes (5211), and the second nozzle (522) is also provided with a plurality of groups of second liquid injection holes (5222) corresponding to the liquid outlet holes (5211), wherein the aperture of the second liquid injection holes (5222) is the same as that of the liquid outlet holes (5211); The second nozzle (522) is provided with an adjustment mechanism (8). When the nozzle assembly (52) rotates in the direction of strong wind, the adjustment mechanism (8) controls the second nozzle (522) to rotate outside the first nozzle (521), so that the second liquid spray hole (5222) and the liquid outlet hole (5211) correspond to each other, so that the liquid medicine passes through the second liquid spray hole (5222) to generate larger droplets for spraying.

4. The drone pesticide spraying device for cherry trees according to claim 3 is characterized in that: The adjustment mechanism (8) comprises a crown gear (81) fixed on the second nozzle (522), a spur gear (82) meshingly connected to the crown gear (81), an arc-shaped rack plate (83) meshingly connected to the spur gear (82), and a connecting plate (84) fixed between the arc-shaped rack plate (83) and the protective cover (6).

5. The drone pesticide spraying device for cherry trees according to claim 4 is characterized in that: A fixing frame (531) is fixed outside the pipeline (53), and the spur gear (82) is rotatably connected to the fixing frame (531) via a rotating shaft (821). A second torsion spring (822) is also provided on the rotating shaft (821).

6. The drone pesticide spraying device for cherry trees according to claim 2, characterized in that: The wind measuring wing (73) is arranged horizontally along the flight direction of the UAV, and the wind measuring wing (73) is a flat plate-shaped structure.

7. The drone pesticide spraying device for cherry trees according to claim 2, characterized in that: A limiting frame (31) for limiting the position of the connecting shaft (72) is symmetrically fixed on the support seat (3).

8. The drone pesticide spraying device for cherry trees according to claim 2 is characterized in that: The bottom end of the protective cover (6) is symmetrically provided with slots (61) for the pipe (53) to rotate; A bracket (62) is fixed outside the protective cover (6), and the main shaft (71) and the bracket (62) are rotatably connected via a bearing.

9. The drone pesticide spraying device for cherry trees according to claim 4, characterized in that: Protruding rods (831) for limiting the position of the spur gear (82) are symmetrically fixed at both ends of the arc-shaped rack plate (83).

10. The drone pesticide spraying device for cherry trees according to claim 1, characterized in that: The main body (1) is also provided with a sensor, a battery, a navigation system and a pest identification system.

Images