Agricultural unmanned aerial vehicle spraying device

Abstract

The invention relates to the technical field of unmanned aerial vehicle spraying, in particular to an agricultural unmanned aerial vehicle spraying device which comprises a spraying unmanned aerial vehicle, a front support is fixedly connected to the spraying unmanned aerial vehicle, a front shaft seat is rotatably arranged on the front support, a front wind plate is fixedly connected to the front shaft seat, and the front wind plate can drive the front shaft seat to rotate under the action of wind power. The spraying unmanned aerial vehicle is rotationally connected with a front rotating shaft, the axial direction of the front rotating shaft is parallel to the positive wind plate, the front shaft seat can drive the front rotating shaft to rotate through the belt wheel set in the rotating process, the spraying unmanned aerial vehicle is rotationally connected with a front spraying head, and liquid carried in the spraying unmanned aerial vehicle can be sprayed out through the front spraying head. And the front rotating shaft drives the front spray head to rotate, so that the front spray head can spray liquid in the front-back direction against the wind. The device can automatically adjust the pesticide spraying angle under different wind directions and wind power conditions.

Description

Technical Field

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

[0002] A spraying drone is an automated device specifically used in the agricultural field to spray pesticides on crops. It is also called an agricultural plant protection drone. It can spray pesticides over farmland, effectively improving agricultural production efficiency.

[0003] At present, spraying drones are usually used in large-scale cultivated farmland. Due to the open cultivated area, windy weather is often encountered during the operation. The sprayed pesticides will drift excessively to one side under the action of wind, which not only makes it difficult to spray the pesticides in the target area, causing the loss of pesticides, but also may cause excessive spraying of pesticides in other areas, because when spraying the target area, the pesticides may be blown to the area that has been sprayed. Therefore, it is necessary to develop an agricultural drone spraying device that can adjust the spraying angle according to wind direction and wind force. Summary of the invention

[0004] In order to overcome the disadvantage in the prior art that the sprayed pesticides will drift excessively to one side under the action of wind, the purpose of the present invention is to provide an agricultural drone spraying device that can adjust the spraying angle according to wind direction and wind force.

[0005] The technical solution is: an agricultural UAV spraying device, including a spraying UAV, a front bracket is fixedly connected to the spraying UAV, a front axle seat is rotatably arranged on the front bracket, a positive wind plate is fixedly connected to the front axle seat, the positive wind plate can drive the front axle seat to rotate under the action of wind, a front rotating shaft is rotatably connected to the spraying UAV, the axial direction of the front rotating shaft is parallel to the positive wind plate, and the front rotating shaft can be driven to rotate through a pulley group during the rotation of the front axle seat, a front nozzle is rotatably connected to the spraying UAV, and liquid carried in the spraying UAV can be sprayed out through the front nozzle, the front rotating shaft and the rotating shaft of the front nozzle are fixedly connected to drive the front nozzle to rotate through the front rotating shaft, so that the front nozzle can spray liquid in the front and rear directions against the wind.

[0006] As an improvement of the above scheme, it also includes a range reduction mechanism for preventing the front nozzle from rotating at will, the range reduction mechanism includes a sleeve, the sleeve is rotatably connected to the front bracket, and the sleeve is transmission connected to the front axle seat through a pulley group, the front axle seat is sleeved with a secondary torsion spring, the two ends of the secondary torsion spring are fixedly connected to the front axle seat and the sleeve, the sleeve is sleeved with a main torsion spring, the two ends of the main torsion spring are fixedly connected to the front bracket and the sleeve, and the elastic force of the main torsion spring is greater than the elastic force of the secondary torsion spring, a range reduction sleeve is fixedly connected in the sleeve, the front axle seat passes through the range reduction sleeve and is rotatably connected thereto, a notch is opened in the axial direction on the range reduction sleeve, a push rod is fixedly provided on the front axle seat, the push rod is located in the notch opened on the range reduction sleeve, so that the sleeve can be pushed to rotate by the push rod during the rotation of the front axle seat.

[0007] As an improvement to the above solution, the notch formed on the deceleration sleeve is larger than the width of the push rod, so that the push rod can only come into contact with the deceleration sleeve after the front axle seat rotates by a certain angle.

[0008] As an improvement to the above solution, it further includes an exhaust air plate, which is rotatably connected to the positive air plate. Through holes for air flow to pass through are formed on the positive air plate, and the exhaust air plate is located within the through holes.

[0009] As an improvement to the above solution, it further includes a locking mechanism for locking the exhaust air plate. The locking mechanism includes a screw rod, the screw rod is threadedly connected to the positive air plate, a fixed ring equal in number to the exhaust air plate is rotatably connected to the screw rod, a limiting rod is fixedly connected to each fixed ring, a guiding plate for guiding the limiting rod is arranged on the positive air plate, a torsion plate is fixedly connected to the exhaust air plate, the limiting rod and the torsion plate are inserted and matched to limit the rotation of the exhaust air plate, and the screw rod and the positive air plate are threadedly matched to lock the height of the fixed ring.

[0010] As an improvement to the above solution, it further includes a regulating mechanism for adjusting the spraying angle according to the wind force in the left - right direction. The regulating mechanism includes a rear rotating shaft, the rear rotating shaft is arranged on the spraying drone, and the rear rotating shaft and the front rotating shaft are vertically distributed. A rear spray head is rotatably connected to the spraying drone, and the pesticide carried in the spraying drone can also be sprayed out through the rear spray head. A guiding ring is fixedly connected to the rear spray head, the rear rotating shaft is slidably connected to the guiding ring, and when the rear rotating shaft rises or falls, it can drive the rear spray head to rotate in different directions through the guiding ring. A small support is fixedly connected to the spraying drone, a rear axle seat is rotatably connected to the small support, a rear torsion spring is sleeved on the rotating shaft of the rear axle seat, and both ends of the rear torsion spring are fixedly connected to the rear axle seat and the small support. A side wind plate is fixedly connected to the rear axle seat, and a power splitting component is connected to the side wind plate. The power splitting component can drive the rear rotating shaft to move in different directions according to the different rotating directions of the side wind plate.

[0011] As an improvement to the above solution, the power splitting component includes a rear support, the rear support is fixedly connected to the spraying drone, a sliding seat is slidably connected to the rear support, and two springs distributed vertically are arranged on the rear support, and the springs are used to keep the sliding seat in the centered position. A reversing frame is fixedly connected to the sliding seat, two ejector rods are fixedly connected to the reversing frame, an eccentric position of a top block is fixedly connected to the rotating shaft of the rear axle seat, and the top block is located between the two ejector rods.

[0012] As an improvement to the above solution, the positive air plate and the side wind plate are vertically distributed to cope with the wind force in different directions.

[0013] As an improvement to the above solution, through holes for air flow to pass through are also formed on the side wind plate, and an exhaust air plate is rotatably connected within the through holes.

[0014] As an improvement to the above solution, another locking mechanism is arranged at the rear side of the spraying drone, and this locking mechanism is used to lock the exhaust air plate on the side wind plate.

[0015] The beneficial effects are as follows: This device can automatically adjust the pesticide spraying angle under different wind directions and wind force conditions, effectively improving the accuracy and efficiency of pesticide spraying; through the transmission connection of the positive wind plate with the front axle seat, pulley group, and front nozzle, the unmanned aerial vehicle can automatically adjust the spraying angle of the front nozzle according to the wind force in the front and back directions, effectively avoiding the excessive drift of pesticides under the action of wind, improving the spraying accuracy and effect, and the setting of the range reduction mechanism further optimizes the rotation control of the front nozzle, making it stable when the wind force is small or there is no wind, and only adjusting the spraying direction when the wind force reaches a certain level, enhancing the stability and adaptability of the device; the combined use of the exhaust wind plate and the locking mechanism can not only reduce the flight resistance of the unmanned aerial vehicle when there is no natural wind, improve the flight efficiency and endurance, but also lock the exhaust wind plate when the spraying direction needs to be adjusted to ensure the normal progress of the spraying operation. In addition, the introduction of the regulation mechanism and the power distribution component enables the unmanned aerial vehicle to automatically adjust the spraying angle of the rear nozzle according to the wind force in the left and right directions, further expanding the applicable range of the unmanned aerial vehicle and enhancing its operation ability under complex meteorological conditions; the vertical distribution design of the positive wind plate and the side wind plate fully considers the influence of multiple wind directions in the front, back, left, and right directions, improving the control effect of the device on the spraying angle and enhancing the adaptability of the unmanned aerial vehicle to complex environments. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the connection relationship of the pulley group of the present invention.

[0018] Figure 3 It is a schematic diagram of the positional relationship of the sleeve of the present invention.

[0019] Figure 4 It is a schematic diagram of the positional relationship of the push rod of the present invention.

[0020] Figure 5 It is a schematic diagram of the positional relationship of the torsion plate of the present invention.

[0021] Figure 6 It is a schematic diagram of the positional relationship of the top block of the present invention.

[0022] Figure 7 It is a schematic diagram of the structure of the guide ring of the present invention.

[0023] Names of the reference numerals in the figure: 10 - spraying UAV, 11 - front support, 12 - front axle seat, 13 - positive air plate, 14 - front rotating shaft, 15 - pulley set, 16 - front spray head, 20 - sleeve, 21 - auxiliary torsion spring, 22 - main torsion spring, 23 - deceleration sleeve, 24 - push rod, 30 - exhaust air plate, 31 - screw rod, 32 - fixing ring, 33 - limiting rod, 34 - torsion plate, 40 - rear support, 41 - rear rotating shaft, 42 - rear spray head, 43 - guiding ring, 44 - small support, 45 - rear axle seat, 46 - rear torsion spring, 47 - side air plate, 50 - sliding seat, 51 - spring, 52 - reversing frame, 53 - ejector rod, 54 - ejector block. Detailed implementation mode

[0024] The following further illustrates the technical solution in combination with specific embodiments. It should be noted that: The words indicating directions such as up, down, left, and right in this article are only for the positions of the shown structures in the corresponding drawings. The serial numbers assigned to the components in this article itself, for example: first, second, etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And as used in this application: connection, coupling, unless otherwise specified, both include direct and indirect connection (coupling).

[0025] Embodiment 1: An agricultural UAV spraying device, as Figures 1-3 shown, includes a spraying UAV 10, a front support 11, a front axle seat 12, a positive air plate 13, a front rotating shaft 14, a pulley set 15, and a front spray head 16. The spraying UAV 10 is a UAV used for spraying pesticides in the prior art. Two front supports 11 are symmetrically and fixedly connected to the front side of the spraying UAV 10. A front axle seat 12 is rotatably arranged on the two front supports 11 together. A positive air plate 13 is fixedly connected to the front axle seat 12. The positive air plate 13 can drive the front axle seat 12 to rotate under the action of wind force. The front rotating shaft 14 is rotatably connected to the frame on the front side of the spraying UAV 10. The axial direction of the front rotating shaft 14 is parallel to the positive air plate 13. During the rotation of the front axle seat 12, the front rotating shaft 14 can be driven to rotate through the pulley set 15. Two front spray heads 16 are rotatably connected to the frame on the front side of the spraying UAV 10. The front spray heads 16 are communicated with the water tank of the spraying UAV 10 itself, so that the pesticides carried in the spraying UAV 10 can be sprayed out through the front spray heads 16. The front rotating shaft 14 is fixedly connected to the rotating shafts of the two front spray heads 16, so as to drive the two front spray heads 16 to rotate through the front rotating shaft 14, so that the front spray heads 16 can spray pesticides in the upwind direction in the front and back directions.

[0026] As Figures 2-3As shown, it also includes a range reduction mechanism for preventing the front nozzle 16 from rotating at will. The range reduction mechanism is connected to the front axle seat 12. The range reduction mechanism includes a sleeve 20, an auxiliary torsion spring 21, a main torsion spring 22, a range reduction sleeve 23 and a push rod 24. The opposite ends of the two front brackets 11 are rotatably connected to the sleeve 20. The sleeve 20 is connected to the front axle seat 12 through a pulley group 15. The pulley group 15 consists of two pulleys and a transmission belt, one of which is fixedly connected to the front rotating shaft 14, and the other pulley is fixedly connected to the sleeve 20. The transmission belt is wound around the two pulleys. Two auxiliary torsion springs 21 are symmetrically sleeved on the front axle seat 12, one end of the auxiliary torsion spring 21 is fixedly connected to the front axle seat 12, and the other end of the auxiliary torsion spring 21 is fixedly connected to the sleeve 20. A main torsion spring 22 is sleeved on the sleeve 20, and one end of the main torsion spring 22 is fixedly connected to the front The bracket 11 is fixed, and the other end of the main torsion spring 22 is fixed to the sleeve 20, and the elastic force of the main torsion spring 22 is greater than the elastic force of the auxiliary torsion spring 21. A reduction sleeve 23 is fixed in the sleeve 20, and a notch is provided in the axial direction on the reduction sleeve 23 to make it C-shaped. The front axle seat 12 passes through the reduction sleeve 23 and is rotatably connected thereto, that is, the front axle seat 12 is rotatably arranged on the front bracket 11 through the reduction sleeve 23 and the sleeve 20, and a push rod 24 is fixedly arranged on the front axle seat 12, and the push rod 24 is located in the notch provided on the reduction sleeve 23, but the notch on the reduction sleeve 23 is larger than the width of the push rod 24, so that the push rod 24 can contact the reduction sleeve 23 only after the front axle seat 12 rotates a certain angle, and the arrangement of the push rod 24 and the reduction sleeve 23 enables the front axle seat 12 to drive the front shaft 14 to rotate through the pulley set 15 during the rotation process.

[0027] The staff member adds the liquid medicine to be sprayed into the medicine box of the spraying drone 10 in advance, and then controls the spraying drone 10 to take off. The side where the positive wind plate 13 is located is the front side. The spraying drone 10 flies forward. When there is wind blowing from the front side, the wind force will push the positive wind plate 13 and the front axle seat 12 to rotate counterclockwise, and the auxiliary torsion spring 21 will be stored with energy. When the front axle seat 12 rotates, it will drive the push rod 24 to rotate. When the wind force is small, the rotation amplitude of the front axle seat 12 is small. Since the elastic force of the auxiliary torsion spring 21 is less than the elastic force of the main torsion spring 22, the push rod 24 will not contact the deceleration sleeve 23 at this time, that is, the push rod 24 cannot push the sleeve 20 to rotate, and the sleeve 20 cannot drive the front rotating shaft 14 to rotate through the pulley group 15. When the wind force is large, the rotation amplitude of the positive wind plate 13 and the front axle seat 12 is large. At this time, the push rod 24 will contact the deceleration sleeve 23, and the push rod 24 will push the sleeve 20 to rotate through the deceleration sleeve 23, and the main torsion spring 22 will be stored with energy. When the sleeve 20 rotates, it will drive the front rotating shaft 14 and the front nozzle 16 to rotate counterclockwise through the pulley group 15, so that the liquid spraying port at the lower end of the front nozzle 16 tilts forward, avoiding excessive backward spraying of the liquid medicine under the action of the wind force. When there is wind blowing from the rear side, the wind force will push the positive wind plate 13 and the front axle seat 12 to rotate clockwise, and the auxiliary torsion spring 21 will be stored with energy. When the front axle seat 12 rotates, it will drive the push rod 24 to rotate. When the wind force is small, the rotation amplitude of the front axle seat 12 is small. Since the elastic force of the auxiliary torsion spring 21 is less than the elastic force of the main torsion spring 22, the push rod 24 will not contact the deceleration sleeve 23 at this time, that is, the push rod 24 cannot push the sleeve 20 to rotate, and the sleeve 20 cannot drive the front rotating shaft 14 to rotate through the pulley group 15. When the wind force is large, the rotation amplitude of the positive wind plate 13 and the front axle seat 12 is large. At this time, the push rod 24 will contact the deceleration sleeve 23, and the push rod 24 will push the sleeve 20 to rotate through the deceleration sleeve 23, and the main torsion spring 22 will be stored with energy. When the sleeve 20 rotates, it will drive the front rotating shaft 14 and the front nozzle 16 to rotate clockwise, which will drive the liquid spraying port at the lower end of the front nozzle 16 to tilt backward, thus avoiding excessive forward spraying of the liquid medicine under the action of the wind force.

[0028] Embodiment 2: On the basis of Embodiment 1, as Figure 2 shown, it further includes an exhaust air plate 30. The three exhaust air plates 30 are rotatably connected to the positive wind plate 13, and the three exhaust air plates 30 are equidistantly distributed in the vertical direction. Three through holes are equidistantly formed in the positive wind plate 13 in the vertical direction, and each exhaust air plate 30 is located in one through hole.

[0029] As Figure 2 and Figure 5As shown, it further includes a locking mechanism for locking the exhaust air plate 30. The locking mechanism is connected to the positive air plate 13. The locking mechanism includes a screw 31, a fixing ring 32, a limiting rod 33 and a torsion plate 34. The screw 31 is threadedly connected to the positive air plate 13. The screw 31 is only threaded on the upper side. Three fixing rings 32 are rotatably connected to the screw 31 at equal intervals. Limiting rods 33 are fixedly connected to the fixing rings 32. A guiding plate for guiding the limiting rod 33 is arranged on the positive air plate 13, so that the fixing ring 32 can move in the vertical direction when the screw 31 rotates. One end of the rotating shaft of the exhaust air plate 30 close to the screw 31 is fixedly connected with a torsion plate 34. The limiting rod 33 and the torsion plate 34 are inserted and matched to limit the rotation of the exhaust air plate 30. The screw 31 and the positive air plate 13 are threadedly matched to lock the height of the fixing ring 32.

[0030] When there is no wind in the working environment, the so-called no wind here refers to no natural wind. However, there will be air resistance during the flight of the spraying drone 10, which is called non-natural wind here. The staff rotates the screw 31 to make the screw 31 move downward. The screw 31 will drive the fixing ring 32 and the limiting rod 33 to move downward, so that the limiting rod 33 and the torsion plate 34 are separated from contact. At this time, the non-natural wind can push the exhaust air plate 30 to rotate, thereby opening the through hole on the positive air plate 13 and reducing the flight resistance of the spraying drone 10; when it is necessary to close the through hole on the positive air plate 13, the staff first rotates the exhaust air plate 30 to a vertical state, and then reversely rotates the screw 31 to move upward, so that the limiting rod 33 is inserted into the through hole on the torsion plate 34, thereby restricting the rotation of the exhaust air plate 30, so as to adjust the spraying direction of the front nozzle 16 according to the wind force.

[0031] Embodiment 3: On the basis of Embodiment 2, as Figure 1 、 Figure 6 and Figure 7As shown in the figure, it further includes a control mechanism for adjusting the spraying angle according to the wind force in the left - right direction. The control mechanism is installed on the spraying drone 10. The control mechanism includes a rear rotating shaft 41, a rear nozzle 42, a guide ring 43, a small bracket 44, a rear shaft seat 45, a rear torsion spring 46, a side wind plate 47 and a power - dividing component. A rear rotating shaft 41 is arranged at the rear side of the spraying drone 10. The rear rotating shaft 41 and the front rotating shaft 14 are vertically distributed. Two rear nozzles 42 are symmetrically and rotatably connected to the frame on the rear side of the spraying drone 10. The rear nozzles 42 are also communicated with the water tank of the spraying drone 10 itself, so that the pesticides carried in the spraying drone 10 can also be sprayed out through the rear nozzles 42. A guide ring 43 is fixedly connected to the rear nozzle 42. A V - shaped slideway is opened on the guide ring 43. The two ends of the rear rotating shaft 41 are slidably connected to the slideways on the two guide rings 43. When the rear rotating shaft 41 is at the normal height, its two ends are located in the middle of the guide ring 43, so as to drive the rear nozzle 42 to rotate in different directions through the rising and falling of the rear rotating shaft 41. A small bracket 44 is fixedly connected to the rear side of the spraying drone 10. A rear shaft seat 45 is rotatably connected to the small bracket 44. A rear torsion spring 46 is sleeved on the rotating shaft of the rear shaft seat 45. One end of the rear torsion spring 46 is fixedly connected to the rear shaft seat 45, and the other end of the rear torsion spring 46 is fixedly connected to the small bracket 44. A side wind plate 47 is fixedly connected to the rear shaft seat 45. A power - dividing component is connected to the side wind plate 47. The power - dividing component can drive the rear rotating shaft 41 to move in different directions according to the different rotating directions of the side wind plate 47.

[0032] As Figure 1 and Figure 6 As shown in the figure, the power - dividing component includes a rear bracket 40, a slide seat 50, a spring 51, a reversing frame 52, a top rod 53 and a top block 54. A rear bracket 40 is fixedly connected to the rear side of the spraying drone 10. Two guide rods are fixedly arranged on the rear bracket 40. A slide seat 50 is slidably connected to the guide rods in the vertical direction. And two springs 51 are sleeved on each guide rod and are distributed up and down. The slide seat 50 is located between the two springs 51. The two springs 51 are used to keep the slide seat 50 in the centered position. A reversing frame 52 is fixedly connected to the slide seat 50. Two top rods 53 are fixedly connected to the reversing frame 52. A top block 54 is fixedly connected to the rotating shaft of the rear shaft seat 45. And the position where the top block 54 is connected to the rear shaft seat 45 is its eccentric position. The top block 54 is located between the two top rods 53. And when the side wind plate 47 is not affected by the wind force, the top block 54 is in a horizontal state.

[0033] Taking the Figure 6 viewpoint in Figure 6The side where the middle screw 31 is located is the front side. When wind blows from the right side of the spraying drone 10, the wind will push the side wind plate 47 and the rear axle seat 45 to swing to the left, and the rear torsion spring 46 will be charged. The leftward swing of the rear axle seat 45 will drive the top block 54 to push the top rod 53 upward, thereby driving the reversing frame 52 and the slide seat 50 to slide upward, and the upper spring 51 will be compressed, and the slide seat 50 will drive the rear shaft 41 to move upward. When the rear shaft 41 moves upward, it will drive the rear nozzle 42 to swing to the right through the guide ring 43, thereby preventing the liquid from being excessively sprayed under the action of wind. On the contrary, when wind blows from the left side of the spraying drone 10, the wind will push the side wind plate 47 and the rear axle seat 45 to swing to the right, the rear torsion spring 46 will be charged, and the rear axle seat 45 swinging to the right will drive the top block 54 to push the top rod 53 downward, thereby driving the reversing frame 52 and the slide 50 to slide downward, the spring 51 on the lower side will be compressed, and the slide 50 will drive the rear shaft 41 to move downward. When the rear shaft 41 moves downward, it will drive the rear nozzle 42 to swing to the left through the guide ring 43, thereby preventing the liquid from being excessively sprayed to the right under the action of wind.

[0034] The front wind plate 13 and the side wind plate 47 are distributed vertically to adjust the angles of the front nozzle 16 and the rear nozzle 42 according to the wind forces in different directions of front, back, left and right. It should be noted that the front nozzle 16 and the rear nozzle 42 are not used at the same time. When there is wind in the left and right directions, the rear nozzle 42 is used, and when there is wind in the front and back directions, the front nozzle 16 is used.

[0035] The side wind plate 47 is also provided with three through holes equidistantly arranged in the vertical direction, and the exhaust plates 30 are rotatably connected to the three through holes.

[0036] Another locking mechanism is provided on the rear side of the spraying drone 10, which is used to lock the exhaust plate 30 on the side wind plate 47. The specific setting method is that a screw 31 is threadedly connected to the side wind plate 47, and three fixing rings 32 are equidistantly connected to the screw 31 for rotation. A limiting rod 33 is fixedly connected to the fixing ring 32, and a guide plate for guiding the limiting rod 33 is provided on the side wind plate 47, so that the fixing ring 32 can move in the vertical direction when the screw 31 rotates, and a torsion plate 34 is fixedly connected to the end of the rotating shaft of the exhaust plate 30 close to the screw 31, and the limiting rod 33 and the torsion plate 34 are plug-in matched to limit the rotation of the exhaust plate 30, and the screw 31 and the side wind plate 47 are threadedly matched to limit the height of the fixing ring 32. The operation method of the locking mechanism is the same as the operation direction of the locking mechanism on the front wind plate 13 mentioned above, which will not be repeated here.

[0037] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An agricultural drone spraying device, comprising a spraying drone (10), characterized in that, A front bracket (11) is fixedly connected to the spraying drone (10), a front axle seat (12) is rotatably provided on the front bracket (11), a positive wind plate (13) is fixedly connected to the front axle seat (12), and the positive wind plate (13) can drive the front axle seat (12) to rotate under the action of wind. A front rotating shaft (14) is rotatably connected to the spraying drone (10), the axial direction of the front rotating shaft (14) is parallel to the positive wind plate (13), and the front axle seat (12) can drive the front rotating shaft (14) to rotate through a pulley group (15) during the rotation process. A front spray head (16) is rotatably connected to the spraying drone (10), and liquid carried in the spraying drone (10) can be sprayed out through the front spray head (16). The front rotating shaft (14) and the rotating shaft of the front spray head (16) are fixedly connected so that the front spray head (16) can be driven to rotate through the front rotating shaft (14), so that the front spray head (16) can spray liquid in the direction against the wind in the front and rear directions.

2. The agricultural drone spraying device according to claim 1, characterized in that, The invention also comprises a stroke reduction mechanism for preventing the front nozzle (16) from rotating at will, the stroke reduction mechanism comprising a sleeve (20), the sleeve (20) being rotatably connected to the front bracket (11), and the sleeve (20) being transmission-connected to the front axle seat (12) via a pulley group (15), a secondary torsion spring (21) being sleeved on the front axle seat (12), two ends of the secondary torsion spring (21) being fixedly connected to the front axle seat (12) and the sleeve (20), a main torsion spring (22) being sleeved on the sleeve (20), two ends of the main torsion spring (22) being fixedly connected to the front bracket (11), and a main torsion spring (22) being sleeved on the sleeve (20). The sleeve (20) is fixedly connected, and the elastic force of the main torsion spring (22) is greater than the elastic force of the auxiliary torsion spring (21). A range reduction sleeve (23) is fixedly connected in the sleeve (20). The front axle seat (12) passes through the range reduction sleeve (23) and is rotatably connected thereto. A notch is provided in the axial direction of the range reduction sleeve (23). A push rod (24) is fixedly provided on the front axle seat (12). The push rod (24) is located in the notch provided on the range reduction sleeve (23) so that the sleeve (20) can be pushed to rotate by the push rod (24) during the rotation of the front axle seat (12).

3. The agricultural drone spraying device according to claim 2, characterized in that the reduction The notch formed on the travel sleeve (23) is larger than the width of the push rod (24), so that the push rod (24) can contact the travel sleeve (23) only after the front axle seat (12) rotates a certain angle.

4. The agricultural drone spraying device according to claim 2, characterized in that, It also includes an exhaust plate (30), which is rotatably connected to the positive air plate (13). The positive air plate (13) is provided with a through hole for air flow to pass through, and the exhaust plate (30) is located in the through hole.

5. The agricultural drone spraying device according to claim 3, characterized in that, The invention also comprises a locking mechanism for locking the exhaust plate (30), the locking mechanism comprising a screw rod (31), the screw rod (31) being threadedly connected to the positive air plate (13), the screw rod (31) being rotatably connected to the same number of fixing rings (32) as the exhaust plate (30), the fixing rings (32) being all fixedly connected to the limiting rods (33), the positive air plate (13) being provided with a guide plate for guiding the limiting rods (33), the exhaust plate (30) being fixedly connected to the limiting rods (33), the limiting rods (33) and the twisting plate (34) being plugged in and matched to limit the rotation of the exhaust plate (30), and the screw rod (31) and the positive air plate (13) being threadedly matched to lock the height of the fixing rings (32).

6. The agricultural drone spraying device according to claim 5, characterized in that, It further includes a control mechanism for adjusting the spraying angle according to the wind force in the left - right direction. The control mechanism includes a rear rotating shaft (41). The rear rotating shaft (41) is arranged on the spraying UAV (10), and the rear rotating shaft (41) and the front rotating shaft (14) are vertically distributed. A rear nozzle (42) is rotatably connected to the spraying UAV (10). The pesticide carried in the spraying UAV (10) can also be sprayed out through the rear nozzle (42). A guiding ring (43) is fixedly connected to the rear nozzle (42). The rear rotating shaft (41) is slidably connected to the guiding ring (43). When the rear rotating shaft (41) rises or falls, it can drive the rear nozzle (42) to rotate in different directions through the guiding ring (43). A small bracket (44) is fixedly connected to the spraying UAV (10). A rear shaft seat (45) is rotatably connected to the small bracket (44). A rear torsion spring (46) is sleeved on the rotating shaft of the rear shaft seat (45). Both ends of the rear torsion spring (46) are fixedly connected to the rear shaft seat (45) and the small bracket (44). A side wind plate (47) is fixedly connected to the rear shaft seat (45). A power - dividing component is connected to the side wind plate (47). The power - dividing component can drive the rear rotating shaft (41) to move in different directions according to the different rotating directions of the side wind plate (47).

7. The agricultural drone spraying device according to claim 5, characterized in that, The power - dividing component includes a rear bracket (40). The rear bracket (40) is fixedly connected to the spraying UAV (10). A sliding seat (50) is slidably connected to the rear bracket (40). And two springs (51) are arranged on the rear bracket (40) in an up - and - down distribution. The springs (51) are used to keep the sliding seat (50) in the centered position. A reversing frame (52) is fixedly connected to the sliding seat (50). Two ejector rods (53) are fixedly connected to the reversing frame (52). An eccentric position of a top block (54) is fixedly connected to the rotating shaft of the rear shaft seat (45), and the top block (54) is located between the two ejector rods (53).

8. The agricultural drone spraying device according to claim 6, characterized in that, The front wind plate (13) and the side wind plate (47) are vertically distributed to cope with the wind forces in different directions.

9. The agricultural drone spraying device according to claim 6, characterized in that, The side wind plate (47) is also provided with through - holes for the airflow to pass through. An exhaust wind plate (30) is rotatably connected in the through - holes.

10. The agricultural drone spraying device according to claim 9, characterized in that, Another locking mechanism is arranged at the rear side of the spraying UAV (10). The locking mechanism is used to lock the exhaust wind plate (30) on the side wind plate (47).

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