Unmanned aerial vehicle for pesticide spraying in agriculture and forestry

Abstract

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle for pesticide spraying in agriculture and forestry, which comprises an unmanned aerial vehicle frame provided with a plurality of groups of arms, each arm is provided with a wing, and the unmanned aerial vehicle further comprises a controller for controlling the rotation of the wings; the rack is used for supporting the unmanned aerial vehicle rack, the rack comprises supporting legs connected with the unmanned aerial vehicle rack, and adjusting assemblies are arranged in the supporting legs; the fixing assembly is used for fixing the adjusting rod arranged in a sliding mode; when the unmanned aerial vehicle lands on a slope, the base making contact with the slope firstly is squeezed by the gravity of the unmanned aerial vehicle frame, the adjusting rods move upwards, the first air bags are squeezed, internal air is exhausted into the first air bags corresponding to the other adjusting rods, the other first air bags are expanded, and the adjusting rods not making contact with the slope are pushed to stretch out to make contact with the slope; after all the adjusting rods make contact with the slope through the base, the base extrudes the second air bag, air in the second air bag pushes the fixing block into the fixing groove, and the adjusting rods and the supporting legs are fixed in a limited mode.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles (UAVs), and in particular to a UAV used for spraying pesticides in agriculture and forestry. Background Art

[0002] Unmanned machines, also known as drones, are devices that are controlled by radio remote control equipment and self-contained program control devices, or are operated completely or intermittently autonomously by an onboard computer;

[0003] With the development of modern agriculture and forestry, pest control and crop maintenance have placed higher demands on the efficiency, accuracy, and safety of plant protection operations. Traditional manual pesticide spraying has been replaced by drones. In the prior art, Chinese utility model publication No. CN206797743U discloses a pesticide spraying drone. The drone has a plurality of arms arranged around a fuselage. Wings are provided at the tail of each arm away from the fuselage. A landing gear is provided below the fuselage. The fuselage includes an upper cabin and a lower cabin. A drive device is provided within the upper cabin. The lower cabin is configured as a pesticide storage cabin. A pesticide injection port is provided on the wall of the upper cabin. The pesticide injection port is connected to the pesticide storage cabin via a drug inlet pipe. A drug discharge pipe is provided at the lower portion of the pesticide storage cabin. Nozzles are provided below two symmetrical arms. A pressure pump is provided in the middle of the landing gear. The drug discharge pipe is connected to the pressure pump inlet via a hose. A tee is provided at the pressure pump outlet. The two outlets of the tee are connected to the nozzles on the left and right sides via hoses. This utility model adopts a linear spraying method, and the spraying diameter can reach 8m. In addition, the components used for spraying pesticides are small in size and light in weight, which reduces the load burden of the UAV and greatly improves the efficiency of pesticide spraying.

[0004] However, the design of conventional drone landing gear does not take sloped terrain into consideration. After spraying, the drone needs to land to refill pesticides. When landing on a slope, the fuselage will tilt, and the drone is prone to overturning, causing damage to the equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide a drone for spraying pesticides in agriculture and forestry to solve the problems raised by the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A drone for spraying pesticides in agriculture and forestry, comprising a drone frame, a plurality of arms mounted on the drone frame, each arm having a wing mounted on one end away from the drone frame, and further comprising:

[0008] A controller for controlling the rotation of the wings, wherein a medicine box is installed on the UAV frame at a position below the controller, wherein a pump is provided inside the medicine box, the pump is electrically connected to the controller, and an output end of the pump is connected to a connecting pipe, wherein a nozzle is provided on the connecting pipe;

[0009] A frame for supporting the drone frame, the frame comprising a plurality of support legs connected to the lower end of the drone frame, each support leg having an adjustment assembly disposed therein, the adjustment assembly comprising an adjustment rod slidably disposed within each support leg;

[0010] The fixing assembly is used to fix the sliding adjustment rod, and the fixing assembly includes an elastically arranged fixing block.

[0011] Preferably, a countersunk hole is provided at the lower end of each supporting leg, and an adjusting rod is inserted into the interior of each countersunk hole;

[0012] A first return spring is provided between the upper end of each adjusting rod and the inner top end of the corresponding countersunk hole. Each adjusting rod is elastically connected to the corresponding supporting leg through the cooperation of the first return spring.

[0013] Preferably, a first air bag is provided between the upper end of each adjusting rod and the inner top end of the corresponding countersunk hole;

[0014] Connecting rods are provided between the multiple groups of support legs. A through hole is provided inside each connecting rod, and both ends of each through hole pass through the interior of the corresponding support leg and are connected to the corresponding first airbag.

[0015] Preferably, a clearance hole is provided at the lower end of each adjusting rod, and an inserting rod is inserted into the interior of each clearance hole;

[0016] A second return spring is provided between the upper end of each insertion rod and the inner top end of the corresponding clearance hole, and each insertion rod is elastically connected to the corresponding adjustment rod through the corresponding second return spring.

[0017] Preferably, the elastic force of the second return spring is greater than the elastic force of the first return spring;

[0018] One end of the insertion rod away from the second return spring extends to the outside of the adjustment rod and is fixedly connected to the base.

[0019] Preferably, the inner wall of each countersunk hole is provided with multiple groups of spaced-apart fixing grooves, the outer surface of each adjusting rod is provided with a first receiving groove at a position corresponding to the corresponding fixing groove, a fixing block is inserted into the interior of each first receiving groove, and a third return spring is provided between the inner wall of each first receiving groove and the corresponding end of the fixing block, and the fixing block is elastically inserted into the interior of the fixing groove through the third return spring.

[0020] Preferably, a third airbag is provided between the inner wall of each first receiving groove and the end of the corresponding fixing block;

[0021] A second airbag is provided between the upper end of each insertion rod and the inner top end of the corresponding clearance hole, and a first exhaust pipe is provided between each second airbag and the corresponding third airbag. The second airbag is connected to the third airbag through the first exhaust pipe.

[0022] Preferably, a groove is formed at the upper end of each adjusting rod at a position corresponding to the first airbag, a supporting block is inserted into the interior of each groove, and a fourth return spring is provided between the lower end of each supporting block and the inner bottom end of the corresponding groove;

[0023] The inner wall of each groove is provided with symmetrically distributed through grooves, each through groove passes through the side wall of the supporting block, and a damping block is inserted into the interior of each through groove.

[0024] Preferably, the outer surface of each of the supporting blocks is provided with a bevel groove at a position corresponding to the damping block, and a bevel block is slidably provided inside each of the bevel grooves;

[0025] Each of the beveled blocks is connected to the end of the corresponding damping block.

[0026] Preferably, a guide groove is provided inside each of the beveling blocks, and a guide block is provided inside each of the guide grooves for limited sliding movement, and each of the guide blocks is connected to the end portion of the corresponding beveling block.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention supports the drone frame by multiple groups of supporting legs. When landing on the slope, the base that contacts the slope first will be squeezed by the gravity of the drone frame itself, causing the adjustment rod to move upward. When the adjusting rod moves upward, it squeezes the first airbag, and the gas inside the first airbag is discharged through the through hole to the inside of the first airbag corresponding to the adjusting rod that is not in contact with the slope, causing the expansion of the other first airbag. The expansion of the first airbag pushes the adjusting rod that is not in contact with the slope to extend until it contacts the slope. When all the adjusting rods contact the slope through the base, the drone frame continues to press downward by its own gravity. At this time, the base moves relative to the adjusting rod and squeezes the second airbag. The gas inside the second airbag is discharged through the first exhaust pipe to the inside of the third airbag. The expansion of the third airbag pushes the fixing block to the inside of one group of fixing grooves, thereby realizing the limited fixation of the adjusting rod and the supporting legs, and thus realizing the slope self-adaptation of the drone frame.

[0029] When at least one group of bases contacts the slope, the first airbag is squeezed by the drone frame's own gravity. After the first airbag is squeezed, the gas inside the first airbag is discharged to the inside of other first airbags through the through hole, causing the other groups of adjustment rods to extend and contact the slope. When all bases contact the slope, the drone frame's own gravity is evenly distributed on each base, and the first airbags inside each support leg are compressed. At this time, part of the gas squeezes the supporting block downward. After the supporting block moves downward, it cooperates with the bevel groove and the bevel block to support the damping block outward, so that the damping block contacts the inner wall of the countersunk hole. At this time, when the adjusting rod continues to move relative to the support leg, it needs to overcome the friction between the damping block and the inner wall of the countersunk hole, thereby offsetting the vibration amplitude caused by the landing of the drone frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0031] Figure 2 Schematic cross-sectional view of the support leg structure of the present invention;

[0032] Figure 3 for Figure 2 A schematic diagram of the structure at center A;

[0033] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0034] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point C in the middle;

[0035] Figure 6 This is a schematic diagram of the structural connection between the supporting block and the damping block of the present invention;

[0036] Figure 7 This is a schematic diagram of the connection between the adjustment rod and the insertion rod structure of the present invention;

[0037] Figure 8 It is a cross-sectional schematic diagram of the connection between the adjustment rod and the insertion rod structure of the present invention.

[0038] In the picture:

[0039] 1. UAV frame; 2. Arm; 3. Wing; 4. Support leg; 5. Medicine box; 6. Connecting pipe; 7. Nozzle; 8. Connecting rod; 9. Adjusting rod; 10. Base; 11. Controller; 12. Countersunk hole; 13. First airbag; 14. First return spring; 16. Clearance hole; 17. Insert rod; 18. Second return spring; 19. Second airbag; 20. First exhaust duct; 21. First receiving groove; 22. Fixing groove; 23. Fixing block; 24. Third airbag; 25. Third return spring; 26. Groove; 27. Support block; 28. Bevel groove; 29. ​​Fourth return spring; 30. Through groove; 31. Damping block; 32. Guide groove; 33. Guide block; 34. Through hole; 35. Bevel block. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0042] like Figures 1-8 As shown, the present application provides a drone for spraying pesticides in agriculture and forestry, including a drone frame 1, on which multiple sets of arms 2 are installed, and each of the arms 2 is equipped with a wing 3 at one end away from the drone frame 1, and further comprising:

[0043] The controller 11 is used to control the rotation of the wing 3, and the UAV frame 1 is installed with a medicine box 5 at a position below the controller 11. A pump is provided inside the medicine box 5. The pump is electrically connected to the controller 11, and the output end of the pump is connected to a connecting pipe 6, and a nozzle 7 is provided on the connecting pipe 6.

[0044] In this embodiment: the rotation of the wing 3 is controlled by the controller 11. When the wing 3 rotates, the drone frame 1 and the medicine box 5 are driven to rise to the position where pesticides need to be sprayed through the cooperation of the arm 2. Then, the controller 11 controls the start of the pump inside the medicine box 5. The pump transports the pesticide inside the medicine box 5 to the inside of the connecting pipe 6 and sprays it through the nozzle 7.

[0045] Specifically, such as Figure 2-Figure 3 As shown, a frame is used to support a drone frame 1, and the frame includes multiple groups of support legs 4 connected to the lower end of the drone frame 1, and an adjustment component is provided inside each of the support legs 4, and the adjustment component includes an adjustment rod 9 slidably provided inside each of the support legs 4;

[0046] A fixing assembly, used to fix the sliding adjustment rod 9, the fixing assembly including an elastically arranged fixing block 23;

[0047] In this embodiment: the drone frame 1 is supported by each of the support legs 4. When the drone frame 1 lands on a slope, the adjustment rod 9 inside the support leg 4 that is not in contact with the slope slides out to compensate for the length of the support leg 4, so that the drone frame 1 is in a stable state, and then the sliding adjustment rod 9 is limited and fixed by the fixing component.

[0048] Specifically, such as Figure 2-Figure 3 As shown, a countersunk hole 12 is formed at the lower end of each support leg 4, and an adjusting rod 9 is inserted into the interior of each countersunk hole 12;

[0049] A first return spring 14 is provided between the upper end of each adjusting rod 9 and the inner top end of the corresponding countersunk hole 12. Each adjusting rod 9 is elastically connected to the corresponding supporting leg 4 through the cooperation of the first return spring 14.

[0050] A first air bag 13 is provided between the upper end of each adjusting rod 9 and the inner top end of the corresponding countersunk hole 12;

[0051] Connecting rods 8 are provided between the plurality of support legs 4. A through hole 34 is provided inside each connecting rod 8. Both ends of each through hole 34 pass through the interior of the corresponding support leg 4 and communicate with the corresponding first airbag 13.

[0052] In this embodiment: the support of the UAV frame 1 is achieved by multiple groups of supporting legs 4. When landing on the slope, the base 10 that first contacts the slope will be squeezed by the gravity of the UAV frame 1 itself, causing the adjustment rod 9 to move upward. When the adjustment rod 9 moves upward, it squeezes the first airbag 13. The gas inside the first airbag 13 is discharged through the through hole 34 to the inside of the first airbag 13 corresponding to the adjustment rod 9 that is not in contact with the slope, causing the other first airbag 13 to expand. The expansion of the first airbag 13 pushes the adjustment rod 9 that is not in contact with the slope to extend until it contacts the slope.

[0053] Specifically, such as Figure 3-Figure 4 as well as Figure 7-Figure 8 As shown, the lower end of each adjusting rod 9 is provided with a clearance hole 16, and the interior of each clearance hole 16 is provided with an inserting rod 17;

[0054] A second return spring 18 is provided between the upper end of each of the insertion rods 17 and the inner top end of the corresponding clearance hole 16 , and each of the insertion rods 17 is elastically connected to the corresponding adjustment rod 9 via the corresponding second return spring 18 ;

[0055] The elastic force of the second return spring 18 is greater than the elastic force of the first return spring 14;

[0056] One end of the insertion rod 17 away from the second return spring 18 extends to the outside of the adjustment rod 9 and is fixedly connected to the base 10 .

[0057] The inner wall of each of the countersunk holes 12 is provided with multiple groups of spaced-apart fixing grooves 22, and the outer surface of each of the adjusting rods 9 is provided with a first receiving groove 21 at a position corresponding to the corresponding fixing groove 22. A fixing block 23 is inserted into the interior of each of the first receiving grooves 21, and a third return spring 25 is provided between the inner wall of each of the first receiving grooves 21 and the end of the corresponding fixing block 23. The fixing block 23 is elastically inserted into the interior of the fixing groove 22 through the third return spring 25.

[0058] A third airbag 24 is provided between the inner wall of each first receiving groove 21 and the end of the corresponding fixing block 23;

[0059] A second airbag 19 is provided between the upper end of each of the insertion rods 17 and the inner top end of the corresponding clearance hole 16. A first exhaust pipe 20 is provided between each of the second airbags 19 and the corresponding third airbag 24. The second airbag 19 is connected to the third airbag 24 through the first exhaust pipe 20.

[0060] In this embodiment: since the elastic force of the second return spring 18 is greater than the elastic force of the first return spring 14, the base 10 will first compress the first return spring 14 when it contacts the slope. When all the adjustment rods 9 contact the slope through the base 10, the drone frame 1 continues to press down due to its own gravity. At this time, the base 10 moves relative to the adjustment rod 9 and squeezes the second airbag 19. The gas inside the second airbag 19 is discharged to the inside of the third airbag 24 through the first exhaust pipe 20. The third airbag 24 expands and pushes the fixing block 23 into one of the sets of fixing grooves 22, thereby realizing the limited fixation of the adjustment rod 9 and the support leg 4, thereby realizing the slope self-adaptation of the drone frame 1.

[0061] Specifically, such as Figure 5-Figure 6 As shown, a groove 26 is formed at the upper end of each adjusting rod 9 at a position corresponding to the first airbag 13, and a supporting block 27 is inserted into the interior of each groove 26, and a fourth return spring 29 is provided between the lower end of each supporting block 27 and the inner bottom end of the corresponding groove 26;

[0062] The inner wall of each groove 26 is provided with symmetrically distributed through grooves 30 , each through groove 30 passes through the side wall of the abutting block 27 , and a damping block 31 is inserted into the interior of each through groove 30 ;

[0063] A bevel groove 28 is formed on the outer surface of each of the abutting blocks 27 at a position corresponding to the damping block 31 , and a bevel block 35 is slidably disposed inside each of the bevel grooves 28 ;

[0064] Each of the chamfered blocks 35 is connected to the end of the corresponding damping block 31;

[0065] A guide groove 32 is formed inside each of the beveling blocks 35 . A guide block 33 is slidingly limited inside each of the guide grooves 32 . Each of the guide blocks 33 is connected to the end of the corresponding beveling block 35 .

[0066] In this embodiment: when at least one group of bases 10 contacts the slope, the first airbag 13 is squeezed by the weight of the drone frame 1 itself. After the first airbag 13 is squeezed, the internal gas of the first airbag 13 is discharged to the inside of other first airbags 13 through the through hole 34, causing the other groups of adjusting rods 9 to extend and contact the slope. When all bases 10 contact the slope, the weight of the drone frame 1 itself is evenly distributed on each base 10, and the first airbag 13 inside each supporting leg 4 is compressed. At this time, part of the gas squeezes the supporting block 27 downward. After the supporting block 27 moves downward, it cooperates with the bevel groove 28 and the bevel block 35 to press the damping block 31 outward, so that the damping block 31 contacts the inner wall of the countersunk hole 12. At this time, when the adjusting rod 9 continues to move relative to the supporting leg 4, it needs to overcome the friction between the damping block 31 and the inner wall of the countersunk hole 12, thereby offsetting the vibration amplitude caused by the landing of the drone frame 1.

[0067] The specific solution is as follows: pesticide is injected into the medicine box 5, and then the controller 11 controls the rotation of the wings 3. When the wings 3 rotate, the arms 2 cooperate to drive the drone frame 1 and the medicine box 5 to rise to the position where the pesticide needs to be sprayed. Then, the controller 11 controls the pump inside the medicine box 5 to start, and the pump transports the pesticide inside the medicine box 5 to the inside of the connecting pipe 6, and sprays it through the nozzle 7;

[0068] After the spraying is completed, the drone frame 1 needs to be lowered to the slope to replenish pesticides. At this time, the base 10 that contacts the slope first will be squeezed by the gravity of the drone frame 1 itself, causing the adjusting rod 9 to move upward. When the adjusting rod 9 moves upward, it squeezes the first airbag 13, and the gas inside the first airbag 13 is discharged through the through hole 34 to the first airbag 13 corresponding to the adjusting rod 9 that is not in contact with the slope, causing the other first airbags 13 to expand. The expansion of the first airbag 13 pushes the adjusting rod 9 that is not in contact with the slope to extend until it contacts the slope. When all the adjusting rods 9 contact the slope through the base 10, the gravity of the drone frame 1 continues to press down. At this time, the base 10 moves relative to the adjusting rod 9 and squeezes the second airbag 19. The gas inside the second airbag 19 is discharged through the first exhaust pipe 20 to the inside of the third airbag 24. The expansion of the third airbag 24 pushes the fixing block 23 to the inside of one group of fixing grooves 22, thereby realizing the limited fixation of the adjusting rod 9 and the supporting leg 4, thereby realizing the slope self-adaptation of the drone frame 1;

[0069] When at least one group of bases 10 contacts the slope, the first airbag 13 is squeezed by the gravity of the drone frame 1 itself. After the first airbag 13 is squeezed, the internal gas of the first airbag 13 is discharged to the inside of other first airbags 13 through the through hole 34, causing the other groups of adjusting rods 9 to extend and contact the slope. When all bases 10 contact the slope, the gravity of the drone frame 1 itself is evenly distributed on each base 10, and the first airbag 13 inside each supporting leg 4 is compressed. At this time, part of the gas squeezes the supporting block 27 downward. After the supporting block 27 moves downward, it cooperates with the bevel groove 28 and the bevel block 35 to press the damping block 31 outward, so that the damping block 31 contacts the inner wall of the countersunk hole 12. At this time, when the adjusting rod 9 continues to move relative to the supporting leg 4, it needs to overcome the friction between the damping block 31 and the inner wall of the countersunk hole 12, thereby offsetting the vibration amplitude caused by the landing of the drone frame 1.

[0070] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative; within the scope of the present invention, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0071] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A drone for spraying pesticides in agriculture and forestry, comprising a drone frame (1), a plurality of arms (2) mounted on the drone frame (1), each arm (2) having a wing (3) mounted on one end away from the drone frame (1), characterized in that: Also includes: A controller (11) is used to control the rotation of the wing (3), and a medicine box (5) is installed on the drone frame (1) at a position below the controller (11), a pump is provided inside the medicine box (5), the pump is electrically connected to the controller (11), and the output end of the pump is connected to a connecting pipe (6), and a nozzle (7) is provided on the connecting pipe (6); A frame for supporting an unmanned aerial vehicle frame (1), the frame comprising a plurality of support legs (4) connected to the lower end of the unmanned aerial vehicle frame (1), an adjustment assembly being provided inside each of the support legs (4), the adjustment assembly comprising an adjustment rod (9) slidably provided inside each of the support legs (4); A fixing assembly is used for fixing a sliding adjustment rod (9), wherein the fixing assembly comprises an elastically arranged fixing block (23).

2. The drone for spraying pesticides in agriculture and forestry according to claim 1, characterized in that: The lower end of each support leg (4) is provided with a countersunk hole (12), and an adjusting rod (9) is inserted into the interior of each countersunk hole (12); A first return spring (14) is provided between the upper end of each adjusting rod (9) and the inner top end of the corresponding countersunk hole (12), and each adjusting rod (9) is elastically connected to the corresponding supporting leg (4) through the cooperation of the first return spring (14).

3. The drone for spraying pesticides in agriculture and forestry according to claim 2, characterized in that: A first air bag (13) is provided between the upper end of each adjusting rod (9) and the inner top end of the corresponding counterbore (12); Connecting rods (8) are provided between the plurality of groups of support legs (4), a through hole (34) is provided inside each of the connecting rods (8), and both ends of each through hole (34) pass through the interior of the corresponding support leg (4) and are in communication with the corresponding first airbag (13).

4. The drone for spraying pesticides in agriculture and forestry according to claim 3, characterized in that: The lower end of each adjusting rod (9) is provided with a clearance hole (16), and the interior of each clearance hole (16) is provided with an inserting rod (17); A second return spring (18) is provided between the upper end of each insertion rod (17) and the inner top end of the corresponding clearance hole (16), and each insertion rod (17) is elastically connected to the corresponding adjustment rod (9) through the corresponding second return spring (18).

5. The drone for spraying pesticides in agriculture and forestry according to claim 4, characterized in that: The elastic force of the second return spring (18) is greater than the elastic force of the first return spring (14); One end of the insertion rod (17) away from the second return spring (18) extends to the outside of the adjustment rod (9) and is fixedly connected to the base (10).

6. The drone for spraying pesticides in agriculture and forestry according to claim 5, characterized in that: The inner wall of each of the countersunk holes (12) is provided with a plurality of fixed grooves (22) distributed at intervals, and the outer surface of each of the adjusting rods (9) is provided with a first receiving groove (21) at a position corresponding to the corresponding fixed groove (22), and a fixed block (23) is inserted into the interior of each of the first receiving grooves (21), and a third return spring (25) is provided between the inner wall of each of the first receiving grooves (21) and the end of the corresponding fixed block (23), and the fixed block (23) is elastically inserted into the interior of the fixed groove (22) through the third return spring (25).

7. The drone for spraying pesticides in agriculture and forestry according to claim 6, characterized in that: A third air bag (24) is provided between the inner wall of each first receiving groove (21) and the end of the corresponding fixing block (23); A second airbag (19) is provided between the upper end of each of the insertion rods (17) and the inner top end of the corresponding clearance hole (16), and a first exhaust pipe (20) is provided between each of the second airbags (19) and the corresponding third airbag (24). The second airbag (19) is connected to the third airbag (24) through the first exhaust pipe (20).

8. The drone for spraying pesticides in agriculture and forestry according to claim 3, characterized in that: A groove (26) is provided at the upper end of each adjusting rod (9) at a position corresponding to the first airbag (13), a supporting block (27) is inserted into the interior of each groove (26), and a fourth return spring (29) is provided between the lower end of each supporting block (27) and the inner bottom end of the corresponding groove (26); The inner wall of each groove (26) is provided with symmetrically distributed through grooves (30), each through groove (30) passes through the side wall of the supporting block (27), and a damping block (31) is inserted into the interior of each through groove (30).

9. The drone for spraying pesticides in agriculture and forestry according to claim 8, characterized in that: The outer surface of each of the abutting blocks (27) is provided with a bevel groove (28) at a position corresponding to the damping block (31), and a bevel block (35) is slidably provided inside each of the bevel grooves (28); Each of the beveled blocks (35) is connected to the end of the corresponding damping block (31).

10. The drone for spraying pesticides in agriculture and forestry according to claim 9, characterized in that: A guide groove (32) is provided inside each of the bevel blocks (35), and a guide block (33) is provided inside each of the guide grooves (32) for limited sliding movement. Each of the guide blocks (33) is connected to the end of the corresponding bevel block (35).

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