An unmanned aerial vehicle pesticide spraying device for agricultural aviation

Abstract

This invention provides an agricultural aerial drone pesticide spraying device, belonging to the technical field of pesticide spraying equipment. It includes: a drone body with a pesticide storage cylinder located at the center of its bottom; a support frame inside the storage cylinder; an adjusting disc on the support frame; and two support feet at the bottom of the drone body. A first servo motor is activated to adjust the height of the adjusting disc, ensuring it remains close to the liquid surface to prevent the pesticide from swaying within the storage cylinder. By keeping the pesticide volume relatively stationary, the device's center of gravity is stabilized, reducing the correction pressure on the flight control system and ensuring the drone flies smoothly along a preset path, thus improving operational safety. This invention solves the problem in existing drone pesticide spraying devices where swaying pesticide in the storage cylinder causes interference, alters the device's center of gravity, and leads to fluctuations in the drone's flight attitude, potentially causing flight instability or even a crash.

Description

Technical Field

[0001] This invention relates to the field of pesticide spraying equipment technology, and in particular to a pesticide spraying device for agricultural aviation drones. Background Technology

[0002] Agricultural aviation drone pesticide spraying equipment, commonly known as plant protection drones, is a precision pesticide application equipment that integrates spraying systems using unmanned aerial vehicle technology for agriculture, forestry and other fields.

[0003] Existing drone pesticide spraying devices suffer from interference caused by the shaking of pesticide liquid in the storage tank during use. This alters the device's center of gravity, leading to fluctuations in the drone's flight attitude and potentially causing flight instability or even a crash. Furthermore, the traditional fixed-length pesticide delivery manifold generates wind resistance during flight and is susceptible to lateral torque from wind impacts, causing the drone's flight attitude to deviate and affecting the accuracy of its return route. In addition, the complex operating environment of drones means that after operation, the nozzles are easily contaminated with soil, dust, crop residues, and other debris from the field. These debris can enter the nozzle orifices and cause blockages, affecting the effectiveness of subsequent spraying. Summary of the Invention

[0004] This invention relates to an agricultural aviation drone pesticide spraying device, which can activate a first servo motor to adjust the height of an adjusting disc, keeping the disc close to the liquid surface to prevent the pesticide from swaying in the storage tank. By keeping the liquid volume in a relatively static state, the device's center of gravity is kept stable, reducing the correction pressure on the flight control system, ensuring the drone flies smoothly along a preset path, and improving operational safety.

[0005] This invention provides an agricultural aviation drone pesticide spraying device, specifically comprising: a drone body, a pesticide storage cylinder located at the center of the bottom of the drone body; a support frame located inside the pesticide storage cylinder; an adjusting circular plate located on the support frame; two support legs located at the bottom of the drone body, the two support legs being symmetrically distributed; a mounting base located between the two support legs; a fixing frame located at the center of the top of the mounting base, the fixing frame being located at the bottom of the pesticide storage cylinder; two pesticide delivery mains located at the bottom of the mounting base, the two pesticide delivery mains being centrally symmetrically distributed; a spray head located at the bottom of the pesticide delivery mains, the spray heads being distributed in a linear array; and a fan wheel located at the bottom of the spray head.

[0006] Furthermore, the top of the medicine storage cylinder is provided with a mounting frame, and the mounting frame is fixedly connected to the drone body. A liquid inlet is provided on the outer periphery of the medicine storage cylinder near the top. A liquid level detector is provided inside the medicine storage cylinder. A fixing cover is provided between the medicine storage cylinder and the mounting frame. A pump body is provided on one side of the bottom of the medicine storage cylinder.

[0007] Further, the support frame body includes a support plate, a limiting round rod, a screw rod, and a first servo motor. The support plates are in two places and are distributed symmetrically up and down. A limiting round rod is provided between the left and right ends of the two support plates. A screw rod is rotatably installed between the middle parts of the two support plates through a bearing. The top of the screw rod is provided with a first servo motor, and the first servo motor is located inside the fixed cover.

[0008] Further, a sealing ring is provided on the outer circumference of the adjusting circular plate. A threaded sleeve is provided at the middle position of the adjusting circular plate. Two limiting sleeves are provided on the adjusting circular plate, and the two limiting sleeves are distributed symmetrically.

[0009] Further, the sealing ring of the adjusting circular plate contacts the inner wall of the medicine storage cylinder. The threaded sleeve is sleeved on the screw rod by means of threads. The limiting sleeve is slidably sleeved on the limiting round rod. Moreover, the liquid level detector slidably penetrates through the adjusting circular plate.

[0010] Further, connecting frames are provided at both ends of the mounting seat, and the connecting frames are connected to the support leg frames. Two limiting grooves are provided at the bottom of the mounting seat, and the two limiting grooves are distributed in parallel. A through groove is provided at the middle position of the mounting seat, and the through groove corresponds to the position of the fixed frame.

[0011] Further, a second servo motor is provided on one side of the fixed frame. A rotating shaft rod is rotatably installed on the fixed frame, and the rotating shaft rod is connected to the rotating shaft of the second servo motor. Two gears are provided on the rotating shaft rod, and the gears are located in the through groove and correspond to the limiting grooves.

[0012] Further, a connecting hose is provided at one end of the medicine delivery main pipe, and the connecting hose is connected to the pump body. A limiting slider is provided at the top of the medicine delivery main pipe. A tooth groove is provided at the top of the limiting slider. The medicine delivery main pipe is slidably connected to the limiting groove of the mounting seat through the limiting slider, and the tooth groove is meshed with the gear.

[0013] Further, a connecting bracket is provided at the bottom of the spraying head. The connecting bracket is in a "C" - shaped structure. A support circular plate is provided at the middle position of the bottom horizontal plate of the connecting bracket. A limiting column is provided at the top of the support circular plate; A support ring and a compression spring are sleeved on the limiting column, and the compression spring is supported between the support ring and the support circular plate.

[0014] Further, a bearing sleeve is provided at the bottom of the fan wheel. The fan wheel is arranged on the limiting column, and the bearing sleeve is rotatably connected to the support ring. A stop head is provided at the top of the fan wheel, and the stop head is matched with the spraying head.

[0015] The present invention provides an agricultural aviation - used unmanned aerial vehicle pesticide spraying device, which has the following beneficial effects: In this invention, a first servo motor provides power to drive the lead screw to rotate. Through the transmission cooperation between the lead screw and the threaded sleeve, the adjusting disc can slide downward along the limiting disc. During pesticide spraying, the liquid level detector monitors the liquid level in the storage cylinder, and at the same time, the first servo motor is activated to adjust the height of the adjusting disc, ensuring that the adjusting disc is always close to the liquid surface, preventing the liquid from shaking in the storage cylinder. By keeping the liquid volume in a relatively static state, the center of gravity of the equipment can be kept stable, reducing the correction pressure on the flight control system, ensuring that the UAV flies smoothly along the preset path, and improving operational safety.

[0016] Furthermore, in this invention, the second servo motor provides power to drive the rotating shaft to rotate. By utilizing the meshing transmission of two gears and tooth grooves, the two main delivery pipes can be slidably adjusted along the limiting grooves simultaneously. When the equipment returns after completing the spraying task, the extension length of the two main delivery pipes can be reduced by moving them towards the center. After being folded up, the overall structure of the equipment is more compact, the center of gravity is more concentrated, and the interference of wind load on the flight attitude is significantly reduced, ensuring the accuracy of the return route.

[0017] Furthermore, during the spraying process, the impact force of the drug pushes the fan wheel downwards, causing it to rotate and expand the spraying area. The rotational power of the fan wheel comes from the impact force of the liquid drug itself, eliminating the need for additional drive components such as motors, thus reducing the power load on the equipment. After the drug spraying task is completed, the fan wheel uses the rebound action of the compression spring to drive the baffle head upwards to block the spray head, preventing external debris from entering the spray head and reducing clogging. This eliminates the hassle of frequent unclogging and lowers equipment maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2 A schematic diagram of the drug storage cylinder, support legs, mounting base, fixing frame, drug delivery main pipe, spray head and fan wheel of this application is shown; Figure 3 A schematic diagram showing a cross-sectional view of the drug storage cylinder of this application is provided; Figure 4 A schematic diagram of the support frame and the adjusting circular plate of this application in their disassembled state is shown; Figure 5 A schematic diagram of the support legs, mounting base, and fixing frame of this application is shown; Figure 6 This application shows Figure 5 An enlarged schematic diagram of section A in the middle; Figure 7 A schematic diagram of the main delivery pipe, spray head, and fan wheel of this application is shown; Figure 8 A schematic diagram of the spray head and fan wheel of this application in a disassembled state is shown.

[0021] List of reference numerals in the attached diagram: 1. UAV body; 2. Medicine storage cylinder; 201. Mounting bracket; 202. Liquid inlet; 203. Liquid level detector; 204. Fixing cover; 205. Pump body; 3. Support frame; 301. Support plate; 302. Limiting rod; 303. Lead screw; 304. First servo motor; 4. Adjusting plate; 401. Sealing ring; 402. Threaded sleeve; 403. Limiting sleeve; 5. Support legs; 6. Mounting base; 601. Connecting frame; 60 2. Limiting groove; 603. Through groove; 7. Fixing frame; 701. Second servo motor; 702. Rotating shaft; 703. Gear; 8. Drug delivery main pipe; 801. Connecting hose; 802. Limiting slider; 803. Gear groove; 9. Spray head; 901. Connecting bracket; 902. Supporting circular plate; 903. Limiting post; 9031. Support ring; 9032. Compression spring; 10. Fan wheel; 1001. Bearing sleeve; 1002. Stop. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. Based on the described 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.

[0023] Example 1: Please refer to Figures 1 to 8 : This invention proposes an agricultural aviation drone pesticide spraying device, comprising: a drone body 1, a pesticide storage cylinder 2 located at the bottom center of the drone body 1; a support frame 3 located inside the pesticide storage cylinder 2; an adjusting circular plate 4 located on the support frame 3; two support legs 5 located at the bottom of the drone body 1, symmetrically distributed; a mounting base 6 located between the two support legs 5; a fixing frame 7 located at the top center of the mounting base 6, situated at the bottom of the pesticide storage cylinder 2; two pesticide delivery pipes 8 located at the bottom of the mounting base 6, centrally symmetrically distributed; spray heads 9 located at the bottom of the pesticide delivery pipes 8, arranged in a linear array; and fan wheels 10 located at the bottom of the spray heads 9. The top of the medicine storage cylinder 2 is provided with a mounting bracket 201, and the mounting bracket 201 is fixedly connected to the UAV body 1. The outer periphery of the medicine storage cylinder 2 is provided with a liquid inlet 202 near the top. The medicine storage cylinder 2 is provided with a liquid level detector 203. A fixing cover 204 is provided between the medicine storage cylinder 2 and the mounting bracket 201. A pump body 205 is provided on one side of the bottom of the medicine storage cylinder 2.

[0024] In this embodiment, as Figure 3 and Figure 4 As shown, the support frame 3 includes a support plate 301, a limiting round rod 302, a lead screw 303, and a first servo motor 304. The support plate 301 is distributed in two symmetrical positions, and the limiting round rod 302 is provided between the left and right ends of the two support plates 301. The lead screw 303 is rotatably installed between the middle of the two support plates 301 through a bearing. The first servo motor 304 is provided at the top of the lead screw 303 and is located inside the fixed cover 204. The outer periphery of the adjusting circular plate 4 is provided with a sealing ring 401, the middle position of the adjusting circular plate 4 is provided with a threaded sleeve 402, and the adjusting circular plate 4 is provided with two limiting sleeves 403, which are distributed symmetrically. The sealing ring 401 of the adjusting disc 4 contacts the inner wall of the storage cylinder 2, and the threaded sleeve 402 is threaded onto the lead screw 303. The limiting sleeve 403 is slidably fitted onto the limiting rod 302, and the liquid level detector 203 slides through the adjusting disc 4. In this invention, the first servo motor 304 provides power to drive the lead screw 303 to rotate. Through the transmission cooperation between the lead screw 303 and the threaded sleeve 402, the adjusting disc 4 can slide downward along the limiting rod 302. During pesticide spraying, the liquid level detector 203 monitors the liquid level in the storage cylinder 2, and at the same time, the first servo motor 304 is turned on to adjust the height of the adjusting disc 4, controlling the adjusting disc 4 to always be close to the liquid surface, preventing the liquid from shaking in the storage cylinder 2, and keeping the liquid volume in a relatively static state.

[0025] In this embodiment, as Figures 5 to 7 As shown, the mounting base 6 has connecting brackets 601 at both ends, and the connecting brackets 601 are connected to the support brackets 5. The bottom of the mounting base 6 has two limiting grooves 602, and the two limiting grooves 602 are distributed in parallel. The middle position of the mounting base 6 has a through groove 603, and the through groove 603 corresponds to the position of the fixing bracket 7. A second servo motor 701 is provided on one side of the fixed frame 7. A rotating shaft 702 is rotatably mounted on the fixed frame 7 via a bearing. The rotating shaft 702 is connected to the rotating shaft of the second servo motor 701. Two gears 703 are provided on the rotating shaft 702. The gears 703 are located in the through groove 603 and correspond to the limiting groove 602. One end of the medicine delivery main pipe 8 is provided with a connecting hose 801, and the connecting hose 801 is connected to the pump body 205. A limit slider 802 is provided at the top of the medicine delivery main pipe 8, and a tooth groove 803 is provided at the top of the limit slider 802. The medicine delivery main pipe 8 is slidably connected to the limit groove 602 of the mounting seat 6 through the limit slider 802, and the tooth groove 803 is meshed with the gear 703. In the present invention, the second servo motor 701 provides power to drive the rotation of the rotating shaft rod 702. By using the meshing transmission of the two gears 703 and the tooth grooves 803, the two medicine delivery main pipes 8 can be simultaneously slid and adjusted along the limit groove 602. When the device returns after completing the spraying task, by moving the two medicine delivery main pipes 8 towards the middle for adjustment, the extended length of the medicine delivery main pipe 8 can be reduced.

[0026] Embodiment 2, on the basis of Embodiment 1, as Figure 8 shown, a connecting bracket 901 is provided at the bottom of the spray head 9. The connecting bracket 901 has a "C" - shaped structure, and a support circular plate 902 is provided at the middle position of the bottom horizontal plate of the connecting bracket 901. A limit column 903 is provided at the top of the support circular plate 902; A support ring 9031 and a compression spring 9032 are sleeved on the limit column 903, and the compression spring 9032 is supported between the support ring 9031 and the support circular plate 902; A bearing sleeve 1001 is provided at the bottom of the fan wheel 10. The fan wheel 10 is arranged on the limit column 903, and the bearing sleeve 1001 is rotatably connected to the support ring 9031. A stop head 1002 is provided at the top of the fan wheel 10, and the stop head 1002 is matched with the spray head 9. During the spraying process of the spray head 9 of the present invention, the drug impact force will push the fan wheel 10 downward and make it rotate to expand the drug spraying area. When the drug spraying task is completed, by the rebounding action of the compression spring 9032, the fan wheel 10 drives the stop head 1002 to move upward to block the spray head 9, isolating external debris from entering the interior of the spray head 9 and reducing the blockage of the spray head 9.

[0027] The working principle of this embodiment is as follows: During use, the first servo motor 304 provides power to drive the lead screw 303 to rotate. Through the transmission cooperation between the lead screw 303 and the threaded sleeve 402, the adjusting disc 4 can slide downward along the limiting disc 302. During pesticide spraying, the liquid level detector 203 monitors the liquid level in the storage cylinder 2, and at the same time, the first servo motor 304 is turned on to adjust the height of the adjusting disc 4, controlling the adjusting disc 4 to always be close to the liquid surface, preventing the liquid from shaking in the storage cylinder 2, and keeping the liquid volume in a relatively static state; the second servo motor 701 provides power to drive the rotating shaft 702 to rotate, utilizing the two The meshing transmission of gear 703 and tooth groove 803 allows the two main delivery pipes 8 to slide and adjust along the limiting groove 602 simultaneously. When the equipment returns after completing the spraying task, the extension length of the two main delivery pipes 8 can be reduced by moving them towards the middle. During the spraying process, the impact force of the drug will push the fan wheel 10 downward and make it rotate to expand the spraying area. After the spraying task is completed, the fan wheel 10 drives the stop head 1002 to adjust upward and block the spray head 9 by the rebound action of the compression spring 9032, preventing external debris from entering the spray head 9 and reducing the clogging of the spray head 9.

[0028] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An agricultural aerial drone pesticide spraying device, characterized in that, include: The drone body (1) has a medicine storage cylinder (2) located at the bottom center of the drone body (1); a support frame (3) is located inside the medicine storage cylinder (2); an adjustment plate (4) is located on the support frame (3); two support legs (5) are located at the bottom of the drone body (1), and the two support legs (5) are symmetrically distributed; a mounting base (6) is located between the two support legs (5); a fixing frame (7) is located at the top center of the mounting base (6), and the fixing frame (7) is located at the bottom of the medicine storage cylinder (2); two medicine delivery pipes (8) are located at the bottom of the mounting base (6), and the two medicine delivery pipes (8) are symmetrically distributed; a spray head (9) is located at the bottom of the medicine delivery pipe (8), and the spray head (9) is distributed in a linear array; a fan wheel (10) is located at the bottom of the spray head (9).

2. The agricultural aerial drone pesticide spraying device according to claim 1, characterized in that, The top of the medicine storage cylinder (2) is provided with a mounting bracket (201), and the mounting bracket (201) is fixedly connected to the drone body (1). The medicine storage cylinder (2) is provided with a liquid inlet (202) near the top of the outer periphery. The medicine storage cylinder (2) is provided with a liquid level detector (203). A fixing cover (204) is provided between the medicine storage cylinder (2) and the mounting bracket (201). A pump body (205) is provided on one side of the bottom of the medicine storage cylinder (2).

3. The agricultural aerial drone pesticide spraying device according to claim 1, characterized in that, The support frame (3) includes a support plate (301), a limiting rod (302), a lead screw (303), and a first servo motor (304). The support plate (301) is distributed in two symmetrical positions, and the limiting rod (302) is provided between the left and right ends of the two support plates (301). The lead screw (303) is rotatably installed between the middle of the two support plates (301) through a bearing. The first servo motor (304) is provided at the top of the lead screw (303), and the first servo motor (304) is located inside the fixed cover (204).

4. The agricultural aerial drone pesticide spraying device according to claim 1, characterized in that, The adjusting circular plate (4) is provided with a sealing ring (401) on its outer periphery, and a threaded sleeve (402) is provided in the middle position of the adjusting circular plate (4). The adjusting circular plate (4) is provided with two limiting sleeves (403), and the two limiting sleeves (403) are distributed symmetrically.

5. The agricultural aerial drone pesticide spraying device according to claim 4, characterized in that, The sealing ring (401) of the adjusting disc (4) is in contact with the inner wall of the medicine storage cylinder (2), and the threaded sleeve (402) is fitted onto the lead screw (303) by means of threads, and the limiting sleeve (403) is slidably fitted onto the limiting disc (302), and the liquid level detector (203) slides through the adjusting disc (4).

6. The agricultural aerial drone pesticide spraying device according to claim 1, characterized in that, The mounting base (6) has connecting brackets (601) at both ends, and the connecting brackets (601) are connected to the support brackets (5). The mounting base (6) has two limiting grooves (602) at the bottom, and the two limiting grooves (602) are distributed in parallel. The mounting base (6) has a through groove (603) in the middle, and the through groove (603) corresponds to the position of the fixing bracket (7).

7. The agricultural aerial drone pesticide spraying device according to claim 1, characterized in that, On one side of the fixed frame (7), there is a second servo motor (701). A rotating shaft rod (702) is rotatably mounted on the fixed frame (7) through a bearing, and the rotating shaft rod (702) is connected to the rotating shaft of the second servo motor (701). There are two gears (703) on the rotating shaft rod (702), and the gears (703) are located in the through groove (603), and the gears (703) correspond to the limit grooves (602).

8. The agricultural aerial drone pesticide spraying device according to claim 1, characterized in that, One end of the medicine delivery main pipe (8) is provided with a connecting hose (801), and the connecting hose (801) is connected to the pump body (205). A limit slider (802) is arranged on the top of the medicine delivery main pipe (8), and a tooth groove (803) is arranged on the top of the limit slider (802). The medicine delivery main pipe (8) is slidably connected to the limit groove (602) of the mounting seat (6) through the limit slider (802), and the tooth groove (803) is meshed with the gear (703).

9. The agricultural aerial drone pesticide spraying device according to claim 1, characterized in that, The bottom of the spray head (9) is provided with a connecting bracket (901). The connecting bracket (901) is in a "C" - shaped structure, and a support circular plate (902) is arranged in the middle of the bottom horizontal plate of the connecting bracket (901). A limit column (903) is arranged on the top of the support circular plate (902). A support ring (9031) and a compression spring (9032) are sleeved on the limit column (903), and the compression spring (9032) is supported between the support ring (9031) and the support circular plate (902).

10. An agricultural aerial drone pesticide spraying device according to claim 1, characterized in that... , The bottom of the fan wheel (10) is provided with a bearing sleeve (1001). The fan wheel (10) is arranged on the limit column (903), and the bearing sleeve (1001) is rotatably connected to the support ring (9031). A stop head (1002) is arranged on the top of the fan wheel (10), and the stop head (1002) is matched with the spray head (9).

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