Multi-rotor agricultural plant protection unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicles, in particular to a multi-rotor agricultural plant protection unmanned aerial vehicle which comprises a vehicle body, an undercarriage is fixedly mounted at the bottom end of the vehicle body, a support is fixedly mounted on the vehicle body, wings are rotatably mounted on the support, cleaning devices are arranged in the wings, and blades are arranged on the cleaning devices. The cleaning device is used for driving blades to clean sundries on the wings by utilizing centrifugal force; a shielding device is arranged on the wing, the shielding device shields the cleaning device when no sundries exist on the wing, the cleaning device comprises a sliding groove formed in the wing, and a reset spring is fixedly installed at the bottom end of the sliding groove. The capability of the multi-rotor plant protection unmanned aerial vehicle for eliminating sundries wound on the rotors is improved, so that the reliability of the plant protection unmanned aerial vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles (UAVs), and in particular to a multi-rotor agricultural plant protection UAV. Background Art

[0002] Plant protection drones are unmanned aircraft used for agricultural and forestry plant protection operations. This type of drone sprays pesticides, seeds, powders, etc. through ground remote control or navigation flight control to improve production efficiency. Existing plant protection drones are usually in the form shown in patent number: CN107054658A, patent name: Plant Protection Drone, which adopts a multi-rotor design.

[0003] When the multiple rotors of this type of drone are fully deployed, the distance between the rotors is close. At this time, if debris is caught on a rotor, even if the debris can be thrown out by the rotor, it may be caught by another rotor due to the close distance between different rotors, making it difficult to remove the debris. In addition, when debris is caught on a rotor, the rotation of the rotor will be subject to additional resistance, resulting in unstable force on a single rotor, reducing the service life of the rotor. In addition, since the rotors of drones usually act in pairs to provide stable and balanced lift to prevent the drone from tipping over during flight, when one rotor is caught in debris, there will be a difference between the airflow used to generate lift at the rotor and the airflow of the other rotor symmetrical to it, resulting in an imbalance in the lift of the two rotors, affecting the torque balance of the drone during flight, and further affecting the stability of the drone during flight.

[0004] Because agricultural drones need to work in the wild farmland, under the blowing of wind and airflow generated by the drone rotors, debris such as leaves in the farmland or the wild environment may enter the flight area of ​​the drone, causing debris to be caught in the rotor. At the same time, in order to ensure the spraying effect, the suspension height of agricultural drones is limited, making it difficult for drones to avoid the risk of debris being caught in the rotor by a single climbing height.

[0005] Therefore, a multi-rotor agricultural plant protection UAV is proposed. Summary of the invention

[0006] The object of the present invention is to provide a multi-rotor agricultural plant protection drone to improve the ability of the multi-rotor plant protection drone to remove debris caught on the rotors, thereby improving the reliability of the plant protection drone.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A multi-rotor agricultural plant protection drone comprises a body, a landing gear is fixedly installed at the bottom of the body, a bracket is fixedly installed on the body, a wing is rotatably installed on the bracket, a cleaning device is arranged in the wing, and a shielding device is arranged on the wing, and the shielding device is used to shield the cleaning device.

[0009] Based on this setting, when debris such as plant leaves are caught on the wings of the drone, the cleaning device will cut and destroy the overall structure of the debris on the wings, thereby breaking the debris into multiple smaller parts. These parts will then be thrown off the wings as the wings rotate, thereby completing the cleaning operation of the debris on the wings, improving the ability of multi-rotor plant protection drones to remove debris caught on the rotors, thereby improving the reliability of plant protection drones.

[0010] Preferably, the cleaning device includes a slide groove provided in the wing, a return spring is fixedly installed at the bottom end of the slide groove, a slide rod is slidably installed in the slide groove, a limit block is fixedly installed on the slide rod, and the other end of the return spring is fixedly installed on the limit block; an exposure groove is provided on the wing, a plurality of rotating shafts are evenly installed in the slide groove for rotation, a support part is fixedly installed on each of the rotating shafts, a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are respectively fixedly installed on the support part and the wing; a blade is fixedly installed on the support part, the blade is aligned with the exposure groove, a plurality of top blocks are evenly fixedly installed on the slide rod, a sloped portion 1 is provided on the top block, and the top block is used to resist the support part.

[0011] Through this arrangement, when the UAV is flying, the rotation of the wing drives the slide bar to rotate. At this time, the slide bar will overcome the elastic force of the return spring and undergo centrifugal motion, that is, move in the direction away from the wing. Therefore, the top block on the slide bar will also be displaced, so that the multiple inclined portions on the multiple top blocks are respectively inserted into the bottom of the multiple support portions and abut against these support portions, and as the top block gradually moves, the support portion will be gradually pushed out by the inclined portion and rotate around the rotating shaft. In the process of the support portion rotating, the blade on the support portion will also gradually extend out of the exposed groove, so that the wing has a blade in front of its rotation direction. Therefore, when there is debris involved in the wing, the blade will use the impact force of the collision at the moment when the debris hits the wing to cut and destroy the debris into smaller parts, so these parts will be thrown away from the wing as the wing rotates, thereby completing the cleaning operation of the debris on the wing, improving the ability of the multi-rotor plant protection UAV to remove the debris involved in the rotor, thereby improving the reliability of the plant protection UAV.

[0012] When the drone lands and the wing stops rotating, the slide bar will be retracted into the wing under the action of the return spring. At this time, the abutment between the top block and the support portion is released, and the top block no longer abuts against the support portion. Therefore, under the elastic force of the torsion spring, the blade will be retracted into the exposed groove, so that the blade will not extend out after the wing stops rotating, thereby preventing the user from being injured by the blade when carrying the drone in the closed state, thereby improving the safety of the present invention.

[0013] Preferably, the shielding device includes a spring piece fixedly mounted on the wing, the spring piece is V-shaped, and one end of the V-shape is fixedly connected to the wing; a cover is fixedly mounted on the other end of the spring piece, a through slot is provided on the cover, and the exposed slot is aligned with the through slot.

[0014] With this arrangement, when the wing rotates, the shield will cover the blade inside it, so that when the wing is not entangled or collided with debris, that is, when the wing is not involved in debris, the blade can be prevented from protruding from the overall shape of the wing. At the same time, the shield will form part of the wing shape. Therefore, when the wing is in a rotating state and no debris is involved, the shield can prevent the extended blade from destroying the overall shape of the wing, thereby preventing the extended blade from affecting the airflow state on the wing, thereby ensuring that the airflow state on the wing can meet the design state and improve the flight stability and reliability of the drone.

[0015] When debris is caught on the wing, the impact force generated when the debris collides with the wing will cause the shrapnel to be squeezed and deformed, causing the mask to retreat toward the wing. At this time, the blade that has already extended from the exposure slot will extend from the through slot again as the mask retreats. At this time, the blade truly protrudes onto the shape of the wing. Therefore, the blade edge will come into contact with the debris and use the impact force when the debris collides with the wing to cut and destroy the debris, so that the debris is cut and destroyed into smaller parts, which will then be thrown off the wing as the wing rotates, thereby completing the cleaning operation of the debris on the wing and improving the ability of the multi-rotor plant protection drone to remove debris caught on the rotor, thereby improving the reliability of the plant protection drone.

[0016] Preferably, a plane portion 1 is provided on the top block, and a plane portion 2 and a slope portion 2 are provided on the support portion; the plane portion 1 is used to abut against the plane portion 2, and the slope portion 1 is used to abut against the slope portion 2 to move the blade.

[0017] When the top block on the slide bar tries to drive the support part to rotate, the inclined portion 1 on the top block needs to be inserted into the bottom of its corresponding support part. At this time, by providing the inclined portion 2 on the support part, specifically, at the bottom of the support part, that is, on the side of the support part close to the slide bar, the inclined portion 2 is provided, so that there can be a larger gap between the support part and the top bar in a local range, thereby facilitating the insertion of the inclined portion 1, thereby ensuring that the inclined portion 1 can be accurately inserted into the bottom of the support part, thereby improving the reliability and stability of the movement of the mechanism of the present invention.

[0018] In addition, by providing the plane part 1 and the plane part 2, when the inclined part 1 on the slide bar pushes out the blade through its cooperation with the inclined part 2, as the slide bar continues to move, the inclined part 1 and the inclined part 2 will no longer abut against each other, and the plane part 1 and the plane part 2 will abut against each other instead. At this time, when the blade is hit by an external impact, the abutment of the two plane parts will prevent the support part from applying a thrust to the slide bar in the axial direction of the slide bar, which means that the position of the blade is firmly locked, thus ensuring that the blade can stably maintain an extended state when debris is caught on the wing, thereby cutting the debris, thereby improving the reliability of the present invention.

[0019] Preferably, a limiting portion is fixedly mounted on the side wall surface of the slide groove, the limiting portion abuts against the side surface of the slide rod, and the side wall surface of the rotating shaft abuts against the side surface of the slide rod.

[0020] Since the slide bar needs to be provided with a limit block for fixing the reset spring, a corresponding dimensional margin needs to be reserved in the matching clearance between the slide groove and the slide bar, which may cause the slide bar to shake greatly when sliding in the slide groove, thereby causing local and greater friction between the side wall surface of the slide bar and the slide groove, and then causing the slide bar to be subject to additional and unnecessary friction when sliding in the slide groove, affecting the smooth movement of the mechanism of the present invention, and may also make it difficult to insert the top block and the bottom end of the support portion.

[0021] For this purpose, a limiting part is provided, and the side wall surface of the rotating shaft is made to abut against the side surface of the slide bar. Thus, when the slide bar slides in the slide groove, the limiting part and the rotating shaft will jointly provide a limit for the sliding of the slide bar, restrict the shaking of the slide bar, and improve the stability of the mechanism movement of the present invention.

[0022] Preferably, a silicone ring is fixedly installed at one end of the slide groove that is connected to the outside of the wing. The cross-sectional shape of the silicone ring is a triangle, and one vertex of the triangle points to the center of the silicone ring.

[0023] By setting a silicone ring, the slide can be shielded at the end where the slide is connected to the outside of the wing, thereby preventing debris or liquids in the external environment from invading the slide, thereby ensuring the cleanliness of the slide, and preventing the slide rod from increasing its movement resistance due to the intrusion of impurities, which is conducive to ensuring the smooth movement of the slide rod in the slide. At the same time, when the wing rotates and the slide rod slides, the center part of the silicone ring is easily deformed because the cross-section of the silicone ring is triangular. Therefore, when the slide rod moves centrifugally away from the wing, it can break through the obstruction of the silicone ring and move normally, and can also be retracted normally under the elastic force of the return spring, without affecting the normal use of the slide rod.

[0024] In addition, a counterweight block can be fixedly installed at the top of the sliding rod, thereby changing the position of the center of gravity of the sliding rod, making the center of gravity of the sliding rod closer to the end close to the silicone ring. Therefore, when the sliding rod undergoes centrifugal movement away from the wing, the position where the centrifugal force acts on it is closer to this end of the sliding rod, thereby improving the stability of the sliding rod's movement in the slide groove at this time.

[0025] Preferably, the blade edge of the blade is in an arc shape, and the plane where the arc contour line is located is perpendicular to the axis of the rotating shaft. Therefore, when the blade is ejected from the exposure groove, the portion protruding from the exposure groove can direct the blade edge toward the debris hanging on the wing as much as possible, thereby ensuring the cutting effect of the blade and improving the reliability of the present invention.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. By setting up a cleaning device, when the drone is flying, if there are debris caught on the wing, the blade will use the impact force of the collision to cut and destroy the debris into multiple smaller parts at the moment when the debris hits the wing, and then these parts will be thrown away from the wing as the wing rotates, thereby completing the cleaning operation of the debris on the wing, improving the ability of the multi-rotor plant protection drone to remove the debris caught on the rotor, thereby improving the reliability of the plant protection drone. At the same time, when the drone lands, the blade will be retracted into the wing, thereby improving the safety of the present invention.

[0028] 2. By setting up a shielding device, when the wing rotates, the shield will cover the blade inside it, so that when the wing is not entangled or collided with debris, that is, when the wing is not involved in debris, the blade can be prevented from protruding from the overall shape of the wing. At the same time, the shield will form part of the wing shape. Therefore, when the wing is in a rotating state and no debris is involved, the shield can prevent the extended blade from destroying the overall shape of the wing, thereby preventing the extended blade from affecting the airflow state on the wing, thereby improving the flight stability and reliability of the drone.

[0029] 3. By setting a silicone ring, the slide can be shielded at the end where the slide is connected to the outside of the wing, thereby preventing foreign objects or liquids from the outside environment from invading the slide, thereby ensuring the cleanliness of the slide, and preventing the slide rod from increasing its movement resistance due to the intrusion of foreign objects, which is conducive to ensuring the smooth movement of the slide rod in the slide. At the same time, when the slide rod undergoes centrifugal movement away from the wing, it can break through the obstruction of the silicone ring and move normally, and can also be retracted normally under the elastic force of the return spring, without affecting the normal use of the slide rod. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 2 for Figure 1 A schematic diagram of the structure from top view;

[0032] Figure 3 for Figure 2 A partial cross-sectional diagram of part A;

[0033] Figure 4 for Figure 3 A partial enlarged schematic diagram of part B;

[0034] Figure 5 for Figure 3 A partial enlarged schematic diagram of part C in the middle;

[0035] Figure 6 for Figure 3 Schematic diagram of the local structure under the middle DD section;

[0036] Figure 7 for Figure 4 A partial enlarged schematic diagram of part E in the middle;

[0037] Figure 8 for Figure 7 Schematic diagram of the state in which the plane part 1 and the plane part 2 are in contact with each other.

[0038] In the figure: 1. fuselage body; 2. landing gear; 3. wing; 4. bracket; 31. slide groove; 32. cover; 33. slide bar; 34. exposure groove; 35. limit block; 311. silicone ring; 312. limit part; 321. through groove; 322. spring; 331. counterweight block; 332. top block; 333. inclined portion 1; 334. plane portion 1; 341. rotating shaft; 342. supporting portion; 343. blade; 344. plane portion 2; 345. inclined portion 2; 351. return spring. DETAILED DESCRIPTION

[0039] The following content will use the drawings listed in the aforementioned "Description of Drawings" section to clearly explain the specific implementation methods of the present invention, in the hope that readers can have a more complete and objective understanding of the working principle of the present invention and the corresponding technical effects.

[0040] like Figures 1 to 8 FIG. 1 shows a specific embodiment of the present invention.

[0041] When the present invention is installed, first take out the fuselage body 1, then fix the landing gear 2 on the bottom of the fuselage body 1, fix the bracket 4 on the fuselage body 1, rotatably install the wing 3 on the bracket 4, a cleaning device is arranged in the wing 3, and a shielding device is arranged on the wing 3, which is used to shield the cleaning device.

[0042] Among them, the cleaning device includes a slide groove 31 opened in the wing 3, a return spring 351 is fixedly installed at the bottom end of the slide groove 31, a slide rod 33 is slidably installed in the slide groove 31, a limit block 35 is fixedly installed on the slide rod 33, and the other end of the return spring 351 is fixedly installed on the limit block 35; an exposure groove 34 is opened on the wing 3, a plurality of rotating shafts 341 are evenly installed in the slide groove 31 for rotation, each rotating shaft 341 is fixedly installed with a support portion 342, a torsion spring is sleeved on the rotating shaft 341, and the two ends of the torsion spring are respectively fixedly installed on the support portion 342 and the wing 3; a blade 343 is fixedly installed on the support portion 342, the blade 343 is aligned with the exposure groove 34, a plurality of top blocks 332 are evenly fixedly installed on the slide rod 33, and an inclined portion 333 is provided on the top block 332, and the top block 332 is used to abut against the support portion 342. The shielding device includes a spring piece 322 fixedly mounted on the wing 3. The spring piece 322 is V-shaped, and one end of the V-shape is fixedly connected to the wing 3. A mask 32 is fixedly mounted on the other end of the spring piece 322. A through slot 321 is provided on the mask 32, and the exposed slot 34 is aligned with the through slot 321.

[0043] In addition, the top block 332 is provided with a plane portion 1 334, and the support portion 342 is provided with a plane portion 2 344 and a slope portion 2 345; the plane portion 1 334 is used to abut against the plane portion 2 344, and the slope portion 1 333 is used to abut against the slope portion 2 345 to move the blade 343. Figure 4 As shown, a limiting portion 312 is fixedly installed on the side wall surface of the slide 31, and the limiting portion 312 abuts against the side surface of the slide rod 33, and the side wall surface of the rotating shaft 341 abuts against the side surface of the slide rod 33. A silicone ring 311 is fixedly installed at one end of the slide 31 that is connected to the outside of the wing 3. The cross-sectional shape of the silicone ring 311 is triangular, and one vertex of the triangle points to the center of the silicone ring 311. A counterweight 331 is fixedly installed on the top of the slide rod 33, and the counterweight 331 is spherical. The blade of the blade 343 is in the shape of an arc, and the plane where the contour line of the arc is located is perpendicular to the axis of the rotating shaft 341.

[0044] When the present invention is working, if debris such as plant leaves are caught on the wing 3 of the drone, the cleaning device will cut and destroy the overall structure of the debris on the wing 3, thereby breaking the debris into multiple smaller parts, which will then be thrown away from the wing 3 as the wing 3 rotates, thereby completing the cleaning operation of the debris on the wing 3, improving the ability of the multi-rotor plant protection drone to remove debris caught on the rotor, and thus improving the reliability of the plant protection drone.

[0045] When the cleaning device is in flight, the rotation of the wing 3 drives the slide bar 33 to rotate. At this time, the slide bar 33 will overcome the elastic force of the return spring 351 and move centrifugally, that is, move in a direction away from the wing 3. Therefore, the top block 332 on the slide bar 33 will also be displaced, so that the multiple inclined surface parts 333 on the multiple top blocks 332 are respectively inserted into the bottom of the multiple support parts 342 and abut against these support parts 342. As the top block 332 gradually moves, the support part 342 is gradually pushed out by the inclined surface part 333 and rotates around the rotating shaft 341. During the rotation of the support part 342, the blade 343 on the support part 342 will also gradually extend out of the exposure slot 34, so that the wing 3 has a blade in front of its rotation direction. Therefore, when debris is caught on the wing 3, the blade 343 will use the impact force of the collision to cut the debris into smaller parts at the moment the debris collides with the wing 3. These parts will then be thrown away from the wing 3 as the wing 3 rotates, thereby completing the cleaning operation of the debris on the wing 3, improving the ability of the multi-rotor plant protection drone to remove debris caught on the rotor, and thus improving the reliability of the plant protection drone.

[0046] When the UAV lands and the wing 3 stops rotating, the slide bar 33 will be retracted into the wing 3 under the action of the return spring 351. At this time, the abutment between the top block 332 and the support portion 342 is released, and the top block 332 no longer abuts against the support portion 342. Therefore, under the elastic force of the torsion spring, the blade will be retracted into the exposed groove 34, so that the blade 343 will not extend out after the wing 3 stops rotating, thereby preventing the user from being injured by the blade 343 when carrying the UAV in the closed state, thereby improving the safety of the present invention.

[0047] In addition, when the wing 3 rotates, the shielding device will cover the blade 343 inside, so that when the wing 3 is not entangled or collided with debris, that is, when the debris is not involved, the blade 343 can be prevented from protruding from the overall shape of the wing 3. At the same time, the shield 32 will constitute a part of the shape of the wing 3. Therefore, when the wing 3 is in a rotating state and no debris is involved, the shield 32 can prevent the extended blade 343 from destroying the overall shape of the wing 3, thereby preventing the extended blade 343 from affecting the airflow state on the wing 3, thereby ensuring that the airflow state on the wing 3 can meet the design state, and improving the flight stability and reliability of the drone.

[0048] When debris is caught on the wing 3, the impact force generated at the moment of collision between the debris and the wing 3 will cause the shrapnel 322 to be squeezed and deformed, thereby causing the mask 32 to retreat toward the wing 3. At this time, the blade 343 that has already extended from the exposure groove 34 will extend from the through groove 321 again as the mask 32 retreats. At this time, the blade 343 truly protrudes onto the shape of the wing 3. Therefore, the blade of the blade 343 will come into contact with the debris and, by virtue of the impact force when the debris collides with the wing 3, cut and destroy the debris, so that the debris is cut and destroyed into multiple smaller parts, which will then be thrown off the wing 3 as the wing 3 rotates, thereby completing the cleaning operation of the debris on the wing 3, improving the ability of the multi-rotor plant protection drone to remove debris caught on the rotor, and thus improving the reliability of the plant protection drone.

[0049] It is worth adding that, by providing the plane part 1 334 and the plane part 2 344, when the inclined part 1 333 on the slide bar 33 pushes out the blade 343 through its cooperation with the inclined part 2 345, as the slide bar 33 continues to move, the inclined part 1 333 and the inclined part 2 345 will no longer abut against each other, and the plane part 1 334 and the plane part 2 344 will abut against each other. At this time, when the blade 343 is hit by an external impact, the abutment of the two plane parts will prevent the support part 342 from applying a thrust to the slide bar 33 in the axial direction of the slide bar 33, which means that the position of the blade 343 is firmly locked, thus ensuring that the blade 343 can stably maintain an extended state when debris is caught on the wing 3, thereby cutting the debris, thereby improving the reliability of the present invention.

[0050] In addition, by providing the silicone ring 311, the slide slot 31 can be shielded at the position of one end where the slide slot 31 is connected to the outside of the wing 3, thereby preventing foreign matter or liquid from the external environment from invading the slide slot 31, thereby ensuring the cleanliness of the slide slot 31, and preventing the increase in the movement resistance of the slide bar 33 due to the intrusion of foreign matter, which is conducive to ensuring the smooth movement of the slide bar 33 in the slide slot 31. At the same time, when the wing 3 rotates and the slide bar 33 slides, since the cross section of the silicone ring 311 is triangular, the central part of the silicone ring 311 is easy to deform, so that when the slide bar 33 moves centrifugally away from the wing 3, it can break through the obstruction of the silicone ring 311 and move normally, and can also be retracted normally under the elastic force of the return spring 351, without affecting the normal use of the slide bar 33.

[0051] It should be emphasized that, based on the contents recorded in the above text, although the beneficial effects of the present invention have been elaborated in detail and corresponding specific implementation methods have been provided for this purpose, ordinary technicians in this field can still make conventional substitutions, deformations, etc. based on the given technical solutions without creative labor to achieve the same technical effects, based on the full understanding of the working principle of the present invention, but this should not be considered to exceed the scope of the present invention. Specifically, the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-rotor agricultural plant protection drone, comprising a body (1), a landing gear (2) fixedly mounted at the bottom of the body (1), a bracket (4) fixedly mounted on the body (1), a wing (3) rotatably mounted on the bracket (4), characterized in that: A cleaning device is provided in the wing (3), the cleaning device is provided with a blade (343), and the cleaning device uses centrifugal force to drive the blade (343) to clear the debris on the wing (3); a shielding device is provided on the wing (3), and the shielding device shields the cleaning device when there is no debris on the wing (3).

2. A multi-rotor agricultural plant protection drone according to claim 1, characterized in that: The cleaning device comprises a slide groove (31) provided in the wing (3), a return spring (351) is fixedly installed at the bottom end of the slide groove (31), a slide rod (33) is slidably installed in the slide groove (31), a limit block (35) is fixedly installed on the slide rod (33), and the other end of the return spring (351) is fixedly installed on the limit block (35); an exposure groove (34) is provided on the wing (3), and a plurality of rotating shafts (341) are evenly rotatably installed in the slide groove (31), and each of the rotating shafts (341) A support portion (342) is fixedly mounted on the rotating shaft (341), a torsion spring is sleeved on the rotating shaft (341), and two ends of the torsion spring are fixedly mounted on the support portion (342) and the wing (3) respectively; a blade (343) is fixedly mounted on the support portion (342), and the blade (343) is aligned with the exposure groove (34); a plurality of top blocks (332) are evenly fixedly mounted on the sliding rod (33), and an inclined portion (333) is provided on the top block (332), and the top block (332) is used to abut against the support portion (342).

3. The multi-rotor agricultural plant protection drone according to claim 2, characterized in that: The shielding device comprises a spring sheet (322) fixedly mounted on the wing (3); the spring sheet (322) is V-shaped, and one end of the V-shaped portion is fixedly connected to the wing (3); a shield (32) is fixedly mounted on the other end of the spring sheet (322); a through slot (321) is provided on the shield (32); and the exposure slot (34) is aligned with the through slot (321).

4. The multi-rotor agricultural plant protection drone according to claim 2, characterized in that: The top block (332) is provided with a plane portion 1 (334), and the support portion (342) is provided with a plane portion 2 (344) and a slope portion 2 (345); the plane portion 1 (334) is used to abut against the plane portion 2 (344), and the slope portion 1 (333) is used to abut against the slope portion 2 (345) to move the blade (343).

5. The multi-rotor agricultural plant protection drone according to claim 2, characterized in that: A limiting portion (312) is fixedly mounted on the side wall surface of the slide groove (31), the limiting portion (312) abuts against the side surface of the slide rod (33), and the side wall surface of the rotating shaft (341) abuts against the side surface of the slide rod (33).

6. The multi-rotor agricultural plant protection drone according to claim 2, characterized in that: A silicone ring (311) is fixedly installed at one end of the slide groove (31) that is in communication with the outside of the wing (3); the cross-sectional shape of the silicone ring (311) is a triangle, and one vertex of the triangle points to the center of the silicone ring (311).

7. The multi-rotor agricultural plant protection drone according to claim 6, characterized in that: A counterweight block (331) is fixedly mounted on the top end of the slide bar (33), and the counterweight block (331) is spherical.

8. The multi-rotor agricultural plant protection drone according to claim 2, characterized in that: The blade edge of the blade (343) is in an arc shape, and the plane where the arc contour line is located is perpendicular to the axis of the rotating shaft (341).

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