A forest plant protection drone

Abstract

This invention discloses a forest plant protection drone, relating to the field of drone technology. It includes a drone, a spraying assembly, at least one delivery device, and at least one pesticide pack. The spraying assembly includes at least one nozzle, each connected to the drone's landing gear, and each nozzle is used to spray pesticides onto the forest. Delivery devices are mounted on the drone's fuselage and can apply force to the pesticide pack to attach it to the fuselage. Each delivery device can also release the force on the pesticide pack, allowing it to fall under gravity. Each pesticide pack can burst open at the center of the tree canopy or the center of the tree trunk. This invention improves the uniformity and comprehensiveness of pesticide application, reduces the overall structural weight of the drone, and helps increase the drone's pesticide payload.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a forest plant protection UAV. Background Technology

[0002] Agricultural drones are unmanned aerial vehicles used for the protection of agricultural and forestry plants. Currently, large-payload rotary-wing drones are mostly used for forest protection. These drones typically carry independent, modular pesticide storage pods mounted on their undersides. When performing forest protection operations, they are equipped with atomizing sprayers, centrifugal nozzles, and spreading modules on the ground to achieve targeted pesticide application to forest vegetation. However, the operation method of these pesticide storage pods is relatively limited, leading to uneven pesticide application to trees. Specifically, this is because: only nozzles or spreading modules can be selected for spraying or spreading operations, and operations are usually conducted at a distance of more than 5 meters from the target tree's affected area. In mountainous areas, crosswinds can cause uneven spraying. Furthermore, compared to field crops like rice and wheat, forest protection requires operating on the entire tree canopy, which can be several meters or even tens of meters high. This results in only the top of the tree receiving adequate pesticide application, while the lower parts of the trunk receive less, leading to uneven pesticide application. Summary of the Invention

[0003] The purpose of this invention is to provide a forest plant protection drone to solve the problems existing in the prior art, improve the uniformity and comprehensiveness of pesticide application, reduce the overall structural weight of the drone, and help increase the pesticide load of the drone.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a forest plant protection drone, comprising a drone, a spraying assembly, at least one delivery device, and at least one pesticide pack. The spraying assembly includes at least one nozzle, each nozzle being connected to the drone's landing gear and used for spraying pesticides onto the forest. Each delivery device is mounted on the drone's fuselage and can apply a force to the pesticide pack to attach it to the fuselage. Each delivery device can also release the force on the pesticide pack, allowing it to fall under gravity. Each pesticide pack can burst open at the center of the tree canopy or the center of the tree trunk.

[0006] Preferably, the device also includes a spraying tank and a sprayer. The spraying tank is detachably and fixedly connected to the machine body, and the sprayer is fixedly connected to the bottom of the spraying tank. The sprayer is capable of spraying the pesticide in the spraying tank.

[0007] Preferably, each throwing device corresponds to one of the medicine packets. Each throwing device includes a supporting component and a telescopic device. Each supporting component is rotatably connected to the machine body, and each telescopic device is rotatably connected to the machine body. The output end of each telescopic device is rotatably connected to the corresponding supporting component. Each telescopic device can switch the corresponding supporting component to a conveying state or a throwing state by extending or retracting along its own output shaft. When each supporting component is in the conveying state, it can support the corresponding medicine packet and press it against the outer wall of the dispensing box. When each supporting component switches to the throwing state, it removes the force on the medicine packet, allowing the medicine packet to fall under gravity.

[0008] Preferably, the outer wall of the spraying box is provided with multiple grooves, and each supporting component can support the corresponding medicine pack and press the corresponding medicine pack into one of the grooves.

[0009] Preferably, it further includes at least two hooks, each hook including a locking component and at least one claw hook, each claw hook forming a rotatable connection with the machine body about a first axis; each claw hook can switch to a working state and a released state by rotating about the first axis; when each claw hook is in the working state, each claw hook can extend into one of the grooves and contact the inner top wall of the corresponding groove to provide vertical support for the medicine dispensing box; when each claw hook is in the released state, each claw hook is located outside the corresponding groove; each locking component can lock the corresponding claw hook in the working state onto the medicine dispensing box.

[0010] Preferably, each locking component includes a connecting plate, a sliding piece, and a latch. Each latch is fixedly connected to the medicine dispensing box and is located below the corresponding claw hook. Each latch has a slot on the side near the corresponding claw hook. One end of each connecting plate is fixedly connected to multiple claw hooks of the corresponding hook, and the other end of each connecting plate has a sliding groove extending toward the corresponding latch. Each sliding piece can slide along the sliding groove under external force and switch between a locked state and an unlocked state. When each sliding piece is in the locked state, the end of each sliding piece away from the claw hook can extend into the corresponding slot. Each slot can restrict the corresponding sliding piece from rotating around the first axis and away from the medicine dispensing box. When each sliding piece is in the unlocked state, each sliding piece is located outside the corresponding slot.

[0011] Preferably, the body includes a first annular frame, the spraying box is fitted inside the first annular frame, a portion of the inner surface of the first annular frame can contact the outer wall of the spraying box, and the first annular frame can restrict the movement of the spraying box along a direction perpendicular to the centerline of the first annular frame.

[0012] Preferably, it further includes multiple limiting rings, each of the claw hooks is rotatably connected to the first annular frame around the first axis; each of the limiting rings is fixedly connected to the first annular frame; each of the claw hooks is provided with a limiting ring on both sides, and the two limiting rings on both sides of each claw hook can restrict the corresponding claw hook from moving along the direction of the corresponding first axis.

[0013] Preferably, the body further includes a second annular frame, which is fixedly connected to the first annular frame; the spraying box is fitted inside the second annular frame, the inner ring of the second annular frame can contact the outer wall of the spraying box, and the second annular frame can restrict the movement of the spraying box along a direction perpendicular to the center line of the second annular frame.

[0014] Preferably, the device further includes at least one battery. At least one mounting groove is provided on the upper surface of the spraying box. Each battery is disposed within one of the mounting grooves, and the outer bottom wall of each battery contacts the inner bottom wall of the corresponding mounting groove. At least a portion of the outer side wall of each battery contacts the inner side wall of the corresponding mounting groove. Each battery has a protrusion at its upper end, and the lower surface of each protrusion has a limiting groove extending along the centerline of the second annular frame. At least one limiting strip protruding from the upper surface of the second annular frame is provided. The limiting groove and the limiting strip correspond one-to-one. When each battery is installed into its corresponding mounting groove, each limiting strip extends into its corresponding limiting groove to restrict the movement of the corresponding battery along a direction perpendicular to the centerline of the second annular frame.

[0015] The present invention achieves the following technical effects compared to the prior art:

[0016] This invention provides a forest plant protection drone, comprising a drone, a spraying assembly, at least one delivery device, and at least one pesticide pack. The spraying assembly includes at least one nozzle, each nozzle being connected to the drone's landing gear and used for spraying pesticides onto the forest. Each delivery device is mounted on the drone's fuselage and can apply force to the pesticide pack to attach it to the fuselage. Each delivery device can also release the force on the pesticide pack, allowing it to fall under gravity. Each pesticide pack can burst open at the center of the tree canopy or the center of the tree trunk. This invention provides an integrated "spraying-dropping" agricultural drone, capable of both spraying and dropping pesticide packets. Compared to sprayed droplets, the larger weight of the pesticide packet makes it less susceptible to crosswinds, improving overall pesticide distribution uniformity. The pesticide packet bursts at the center of the tree canopy and trunk, allowing for targeted application to the base and middle of the trunk, further enhancing uniformity and coverage. Furthermore, the integrated spray nozzle on the drone's landing gear eliminates the need for a spray boom, reducing overall weight and increasing payload capacity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the forest plant protection drone provided by the present invention;

[0019] Figure 2 A partial structural diagram of the hook and throwing device for the forest plant protection drone provided by the present invention. Figure 1 ;

[0020] Figure 3 A partial structural diagram of the hook and throwing device for the forest plant protection drone provided by the present invention. Figure 2 ;

[0021] Figure 4 This is a front view of the forest plant protection drone provided by the present invention;

[0022] Figure 5 for Figure 4 Sectional view of AA;

[0023] Figure 6 for Figure 5 Enlarged view of B in the middle;

[0024] Figure 7 A bottom view of the forest plant protection drone provided by the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the spraying box provided by the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the limiting strip provided by the present invention;

[0027] In the diagram: 100. Forest plant protection drone; 1. Drone; 101. Fuselage; 102. First ring frame; 103. Second ring frame; 104. Limiting strip; 2. Nozzle; 3. Throwing device; 301. Supporting component; 302. Telescopic device; 4. Agent pack; 5. Spreading box; 501. Groove; 502. Mounting slot; 6. Spreader; 7. Hook; 701. Claw hook; 702. Connecting plate; 703. Sliding plate; 704. Lock; 705. Slide groove; 8. Limiting ring; 9. Battery. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "center," "longitudinal," "transverse," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "clockwise," and "counterclockwise," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Additionally, it should be noted that in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The purpose of this invention is to provide a forest plant protection drone to solve the problems existing in the prior art, improve the uniformity and comprehensiveness of pesticide application, reduce the overall structural weight of the drone, and help increase the pesticide load of the drone.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1-9 As shown, the present invention provides a forest plant protection drone 100, including a drone 1, a spraying assembly, at least one throwing device 3, and at least one pesticide pack 4. Preferably, there are four throwing devices 3 and four pesticide packs 4. The spraying assembly includes at least one nozzle 2, each nozzle 2 is connected to the landing gear of the drone 1, and each nozzle 2 is used to spray pesticides on the forest. Each throwing device 3 is mounted on the fuselage 101. Each throwing device 3 can apply a force to the pesticide pack 4 to connect the pesticide pack 4 to the fuselage 101, and each throwing device 3 can release the force on the pesticide pack 4 to allow the pesticide pack 4 to fall under the action of gravity. Each pesticide pack 4 can burst open at the middle of the tree crown or the middle of the tree trunk. This invention provides an integrated "spraying-dropping" agricultural drone. It can not only spray pesticides using nozzles 2, but also drop pesticide packets 4. Compared to spraying droplets, the pesticide packets 4 have greater weight and are less affected by crosswinds, thus improving overall pesticide uniformity. The pesticide packets 4 can burst open at the center of the tree canopy and trunk, enabling pesticide application to the middle and base of the trunk, further improving uniformity and coverage. Simultaneously, the nozzles 2 are integrated into the drone's landing gear, eliminating the need for spray booms and reducing the overall weight of the drone, thereby increasing its pesticide payload.

[0033] In this specific embodiment, it also includes a spraying tank 5 and a sprayer 6. The spraying tank 5 is detachably and fixedly connected to the machine body 101, and the sprayer 6 is fixedly connected to the bottom of the spraying tank 5. The sprayer 6 can spray the medicine in the spraying tank 5.

[0034] In this specific embodiment, each throwing device 3 corresponds to a medicine pack 4. Each throwing device 3 includes a supporting component 301 and a telescopic device 302. Each supporting component 301 is rotatably connected to the machine body 101, and each telescopic device 302 is rotatably connected to the machine body 101. The output end of each telescopic device 302 is rotatably connected to the corresponding supporting component 301. Each telescopic device 302 can rotate the corresponding supporting component 301 around the connection point between the supporting component 301 and the machine body 101 by extending and retracting along its own output shaft, so as to switch to the conveying state or the throwing state. When each supporting component 301 is in the conveying state, each supporting component 301 can support the corresponding medicine pack 4 and press the corresponding medicine pack 4 tightly against the outer wall of the dispensing box 5. When each supporting component 301 switches to the throwing state, each supporting component 301 removes the force on the medicine pack 4 so that the medicine pack 4 falls under the action of gravity. When the telescopic device 302 extends, the supporting component 301 rotates toward the spraying box 5 and fixes the medicine pack 4. When the telescopic device 302 shortens, the supporting component 301 rotates away from the spraying box 5 and the medicine pack 4 falls off.

[0035] In this specific embodiment, a plurality of grooves 501 are provided on the outer side wall of the spraying box 5. Each supporting component 301 can support the corresponding medicine pack 4 and press the corresponding medicine pack 4 into a groove 501, which helps to increase the contact area between the medicine pack 4 and the spraying box 5 and improve the fixing effect of the medicine pack 4.

[0036] In this specific embodiment, at least two hooks 7 are also included. Each hook 7 includes a locking component and at least one claw hook 701. Each claw hook 701 is rotatably connected to the body 101 about a first axis. Each claw hook 701 can switch between a working state and a released state by rotating about the first axis. When each claw hook 701 is in the working state, it can extend into a groove 501 and contact the inner top wall of the corresponding groove 501 to provide vertical support for the medicine dispensing box 5. When each claw hook 701 is in the released state, it is located outside the corresponding groove 501. Each locking component can lock the corresponding claw hook 701 in the working state onto the medicine dispensing box 5. It should be noted that the first axis corresponding to each claw hook 701 is not the same axis, and their extension directions may be different or the same.

[0037] In this specific embodiment, each locking component includes a connecting plate 702, a sliding plate 703, and a locking buckle 704. Each locking buckle 704 is fixedly connected to the spraying box 5, and each locking buckle 704 is located below the corresponding claw hook 701. Each locking buckle 704 has a slot on the side near the corresponding claw hook 701. One end of each connecting plate 702 is fixedly connected to multiple claw hooks 701 of the corresponding hook 7, and the other end of each connecting plate 702 is provided with a sliding groove 705 extending toward the corresponding locking buckle 704. Each sliding plate 703... 03 can slide along the slide groove 705 under the action of external force and switch between locked and unlocked states; when each slide 703 is in the locked state, the end of each slide 703 away from the claw hook 701 can extend into the corresponding slot; each slot can restrict the corresponding slide 703 from rotating around the first axis and away from the dispensing box 5; when each slide 703 is in the unlocked state, each slide 703 is located outside the corresponding slot, so that the connecting plate 702 and the claw hook 701 can rotate outward to disengage from the groove 501.

[0038] In this specific embodiment, the body 101 includes a first annular frame 102, and the medicine dispensing box 5 is fitted inside the first annular frame 102. A portion of the inner surface of the first annular frame 102 can contact the outer wall of the medicine dispensing box 5, and the first annular frame 102 can restrict the movement of the medicine dispensing box 5 along a direction perpendicular to the center line of the first annular frame 102. Preferably, the arc-shaped inner sidewalls at the four corners of the first annular frame 102 can contact the outer wall of the medicine dispensing box 5.

[0039] In this specific embodiment, it also includes multiple limiting rings 8, and each claw hook 701 is rotatably connected to the first annular frame 102 around the first axis; each limiting ring 8 is fixedly connected to the first annular frame 102; each claw hook 701 is provided with limiting rings 8 on both sides, and the two limiting rings 8 on both sides of each claw hook 701 can restrict the corresponding claw hook 701 from moving along the direction of the corresponding first axis.

[0040] In this specific embodiment, the body 101 also includes a second annular frame 103, which is fixedly connected to the first annular frame 102; the spraying box 5 is fitted inside the second annular frame 103, the inner ring of the second annular frame 103 can contact the outer wall of the spraying box 5, and the second annular frame 103 can restrict the movement of the spraying box 5 along a direction perpendicular to the center line of the second annular frame 103.

[0041] In this specific embodiment, the centerline of the second annular frame 103 is collinear with the centerline of the first annular frame 102. It should be noted that... Figure 9 Two extension rods are provided on each side of the second annular frame 103.

[0042] In this specific embodiment, at least one battery 9 is also included. The battery 9 can supply power to the telescopic device 302 and the power components of the drone 1. At least one mounting groove 502 is provided on the upper surface of the dispensing box 5. Each battery 9 is disposed in a mounting groove 502, and the outer bottom wall of each battery 9 contacts the inner bottom wall of the corresponding mounting groove 502. At least a portion of the outer side wall of each battery 9 contacts the inner side wall of the corresponding mounting groove 502. A protrusion is provided at the upper end of each battery 9. A limiting groove extending along the center line direction of the second annular frame 103 is provided on the lower surface of each protrusion. At least one limiting strip 104 protruding from the upper surface of the second annular frame 103 is provided on the upper surface of the second annular frame 103. The limiting groove and the limiting strip 104 correspond one-to-one. When each battery 9 is installed into the corresponding mounting groove 502, each limiting strip 104 extends into the corresponding limiting groove to restrict the movement of the corresponding battery 9 in the direction perpendicular to the center line of the second annular frame 103. The spraying box 5 is equipped with mounting slots 502 and grooves 501 for installing the battery 9 and the medicine pack 4, which helps to simplify the structure of the body 101.

[0043] In this specific embodiment, the telescopic device 302 is an electric lead screw. The supporting component 301 has an arc-shaped surface for supporting the medicine package 4, and the medicine package 4 is spherical.

[0044] In this specific embodiment, the drone 1 is preferably a rotary-wing drone with four rotor arms, each rotor arm integrating two nozzles 2. There are four medicine bags 4 and four grooves 501. The medicine dispensing box 5 is approximately hexagonal in shape, with grooves 501 located on the four side edges of the dispensing box 5. Each hook 7 includes two claw hooks 701.

[0045] In this specific embodiment, the spray boom structure is similar to the landing gear structure of the UAV 1. The spray boom serves as the landing gear of the UAV 1, that is, the spray boom is fixedly connected below each rotor arm, and the nozzle 2 is fixedly connected to the spray boom. This invention integrates the rotor arms and the spray boom, so that the nozzle 2 is integrated into the fuselage 101 of the UAV 1. The spray boom serves as the landing gear of the UAV 1, supporting the main body of the UAV during takeoff and landing to ensure its stable support during this phase. The integrated design of the spray boom and the landing gear of the UAV 1 reduces the weight of the UAV 1, improves the structural efficiency to a certain extent, and increases the endurance of the UAV 1 under drug-carrying operations. At the same time, it meets the storage needs of the drug-spraying tank 5 in the altitude direction.

[0046] In this specific embodiment, the rotor arm is made of carbon fiber structural components, which not only have good waterproof and corrosion-resistant properties, but also meet the requirements of rotor power thrust strength design, cable layout and electrical connector connection.

[0047] In this specific embodiment, the spraying assembly also includes a spraying tank and a water pump (not shown in the attached drawings). The spraying tank is connected to each nozzle 2 via pipelines, and the water pump is connected to both the spraying tank and each nozzle 2 to pump the liquid medicine in the spraying tank into the nozzle 2 for spraying.

[0048] In this specific embodiment, the agent pack 4 includes a shell, a time-delay start device, and a detonation device. The shell contains the agent. The time-delay start device and the detonation device are connected by a signal. Before performing the operation, the terrain and landform information of the operation area collected in advance is comprehensively analyzed and calculated, and the relative height between the detonation position and the operation ground is preset in advance. The required falling height of the agent pack 4 can be obtained based on the flight altitude of the UAV 1 during operation and the ground clearance of the required detonation position. The time-delay start device counts down according to the required falling height. After the agent pack 4 falls for the set time under the action of gravity, the detonation device automatically detonates to achieve automatic detonation at the middle position of the tree crown and the middle position of the tree trunk.

[0049] In this specific embodiment, the explosive charge 4 can also be detonated by a distance detection device. The distance detection device is installed on the shell and is used to monitor the height of the explosive charge 4 above the ground. The distance detection device is connected to the detonation device. When the distance detected by the distance detection device is the same as or within the set height range of the position to be detonated, the detonation device will automatically detonate.

[0050] It should be noted that the structure and principle of the automatic detonation device can adopt the relevant structure and principle in the existing technology, which will not be elaborated here.

[0051] This invention integrates a spraying-dropping design with the overall layout of a rotary-wing drone. Taking into account the overall configuration, structural weight, operational efficiency, and operational scenarios of the rotary-wing drone, the spraying tank 5 is designed as a single unit, incorporating a drop-able pesticide pack 4. This allows for the drop-able pesticide pack 4 to be dropped in dense pest control areas in conjunction with traditional spraying methods. This ensures the pesticide bursts near the center of the dense forest and tree trunks, achieving effective pesticide application to the middle and base of the tree trunks. This integrated design on the drone 1 fully utilizes the structural functions and efficiency of the rotary-wing drone. The drop-able operation compensates for the limitations of spraying scenarios, providing multiple application scenarios for the trees, increasing the pesticide adhesion to the middle and base of the tree trunks, and increasing the amount of pesticide applied to trees per application. This further aligns with the productization concept of "cost reduction and efficiency improvement," enhancing the operational efficiency of forest protection processes.

[0052] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A forest plant protection drone, characterized in that: The device includes a drone, a spraying assembly, at least one delivery device, and at least one pesticide pack. The spraying assembly includes at least one nozzle, each nozzle being connected to the landing gear of the drone and used to spray pesticide onto the forest. Each delivery device is mounted on the fuselage and can apply a force to the pesticide pack to attach it to the fuselage. Each delivery device can also release the force on the pesticide pack to allow it to fall under the influence of gravity. Each of the aforementioned medicine packets can burst open at the center of the tree crown or the center of the tree trunk; It also includes a spraying tank and a sprayer. The spraying tank is detachably and fixedly connected to the machine body, and the sprayer is fixedly connected to the bottom of the spraying tank. The sprayer can spray the pesticide in the spraying tank. Each throwing device corresponds to one of the medicine packs. Each throwing device includes a supporting component and a telescopic device. Each supporting component is rotatably connected to the machine body, and each telescopic device is rotatably connected to the machine body. The output end of each telescopic device is rotatably connected to the corresponding supporting component. Each telescopic device can switch the corresponding supporting component to a conveying state or a throwing state by extending or retracting along its own output shaft. When each supporting component is in the conveying state, it can support the corresponding medicine pack and press the corresponding medicine pack firmly against the outer wall of the spraying box. When each of the supporting components switches to the throwing state, each of the supporting components removes the force applied to the medicine pack, allowing the medicine pack to fall under the action of gravity.

2. The forest plant protection drone according to claim 1, characterized in that: The outer wall of the spraying box is provided with multiple grooves, and each supporting component can support the corresponding medicine pack and press the corresponding medicine pack into one of the grooves.

3. The forest plant protection drone according to claim 2, characterized in that: It also includes at least two hooks, each hook comprising a locking assembly and at least one claw hook, each claw hook forming a rotatable connection with the body about a first axis; each claw hook can switch between a working state and a released state by rotating about the first axis; when each claw hook is in the working state, each claw hook can extend into one of the grooves and contact the inner top wall of the corresponding groove to provide vertical support for the medicine dispensing box; when each claw hook is in the released state, each claw hook is located outside the corresponding groove; each locking assembly can lock the corresponding claw hook in the working state onto the medicine dispensing box.

4. The forest plant protection drone according to claim 3, characterized in that: Each locking assembly includes a connecting plate, a sliding piece, and a latch. Each latch is fixedly connected to the medicine dispensing box and is located below the corresponding claw hook. Each latch has a slot on the side near the corresponding claw hook. One end of each connecting plate is fixedly connected to multiple claw hooks of the corresponding hook, and the other end of each connecting plate has a sliding groove extending toward the corresponding latch. Each sliding piece can slide along the sliding groove under external force and switch between a locked state and an unlocked state. When each sliding piece is in the locked state, the end of each sliding piece away from the claw hook can extend into the corresponding slot. Each slot can restrict the corresponding sliding piece from rotating around the first axis away from the medicine dispensing box. When each sliding piece is in the unlocked state, each sliding piece is located outside the corresponding slot.

5. The forest plant protection drone according to claim 4, characterized in that: The body includes a first annular frame, and the spraying box is fitted inside the first annular frame. A portion of the inner surface of the first annular frame can contact the outer wall of the spraying box, and the first annular frame can restrict the movement of the spraying box along a direction perpendicular to the center line of the first annular frame.

6. The forest plant protection drone according to claim 5, characterized in that: It also includes multiple limiting rings, each of the claw hooks is rotatably connected to the first annular frame about a first axis; each of the limiting rings is fixedly connected to the first annular frame; each of the claw hooks is provided with a limiting ring on both sides, and the two limiting rings on both sides of each claw hook can restrict the corresponding claw hook from moving along the extension direction of the first annular frame.

7. The forest plant protection drone according to claim 5, characterized in that: The body also includes a second annular frame, which is fixedly connected to the first annular frame; the spraying box is fitted inside the second annular frame, the inner ring of the second annular frame can contact the outer wall of the spraying box, and the second annular frame can restrict the movement of the spraying box along a direction perpendicular to the center line of the second annular frame.

8. The forest plant protection drone according to claim 7, characterized in that: It also includes at least one battery. At least one mounting groove is provided on the upper surface of the spraying box. Each battery is disposed in one of the mounting grooves, and the outer bottom wall of each battery contacts the inner bottom wall of the corresponding mounting groove. At least a portion of the outer side wall of each battery contacts the inner side wall of the corresponding mounting groove. Each battery has a protrusion at its upper end, and the lower surface of each protrusion has a limiting groove extending along the centerline of the second annular frame. At least one limiting strip protruding from the upper surface of the second annular frame is provided. The limiting groove and the limiting strip correspond one-to-one. When each battery is installed into its corresponding mounting groove, each limiting strip extends into its corresponding limiting groove to restrict the movement of the corresponding battery along a direction perpendicular to the centerline of the second annular frame.

Images