Multi-angle spraying mechanism of plant protection unmanned aerial vehicle

Abstract

A multi-angle spraying mechanism of a plant protection unmanned aerial vehicle relates to the technical field of agricultural spraying devices and comprises a spraying nozzle connected with a spraying box through a guide pipe, and an adjusting assembly is fixedly mounted on the bottom surface of the spraying box. A first rotating shaft driven by a first servo motor and a second rotating shaft driven by a second servo motor are coaxially and rotationally installed on the two sides of the bottom plate correspondingly, the first rotating shaft is fixedly connected with one side of the opening end of a U-shaped frame, and the other side of the opening end of the U-shaped frame is rotationally connected with the second rotating shaft. One end of the connecting rod penetrates through the middle of the closed end of the U-shaped frame to be fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear fixedly installed on a second rotating shaft, the other end of the connecting rod is fixedly connected with the side face of an adjusting plate, and the bottom face of the adjusting plate is connected with a spraying nozzle through a vertical telescopic sleeve. The adjusting plate is controlled through the adjusting assembly to adjust the angle, the problem of fixing the angle of the spraying nozzle is solved, and the flexibility and practicability of the device are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural spraying devices, and in particular to a multi-angle spraying mechanism of a plant protection UAV. Background Art

[0002] At present, China needs a large amount of agricultural plant protection operations every year. In order to improve the efficiency of agricultural plant protection operations, people have begun to use plant protection drones for spraying operations; plant protection drones, also known as unmanned aerial vehicles, as the name suggests, are unmanned aircraft used for agricultural and forestry plant protection operations. This type of unmanned aircraft consists of three parts: a flight platform (fixed-wing, helicopter, multi-axis aircraft), a navigation flight control, and a spraying mechanism. The spraying operation is achieved through ground remote control or navigation flight control, and can spray pesticides, seeds, powders, etc.

[0003] The Chinese utility model patent, application number CN202010777288.9, discloses an anti-sway plant protection drone, including a body, a spiral wing, a spray box and a mounting device; the mounting device includes a damping slider, a first support spring, a second support spring, a telescopic hydraulic rod, a rocker arm and a shock-absorbing assembly, the damping slider is slidably connected to the body and is located inside the storage cavity, one side of the first support spring is fixedly connected to the damping slider, and the other side is fixedly connected to the body and is located between the body and the damping slider, the second support spring One side is fixedly connected to the damping slider, and the other side is fixedly connected to the body, and is located on the side of the damping slider close to the first supporting spring. One end of the telescopic hydraulic rod is fixedly connected to the damping slider, passes through the body, and is located between the first supporting spring and the second supporting spring. The rocker arm is rotatably connected to the telescopic hydraulic rod and is fixedly connected to the spray box. The spray box absorbs vibrations in multiple directions on the horizontal plane, which can keep the drone stable during flight; however, its nozzle angle is fixed and cannot be adjusted, and its practicality is low. Summary of the Invention

[0004] The present invention provides a multi-angle spraying mechanism for a plant protection UAV.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-angle spraying mechanism for a plant protection drone comprises a spray box arranged under the plant protection drone and a spray nozzle connected to the spray box through a conduit, an adjustment component is fixedly installed on the bottom of the spray box, the adjustment component comprises a base plate, a support plate, a first servo motor, a second servo motor, a first bevel gear, a second bevel gear, a U-shaped frame, a first rotating shaft and a second rotating shaft, a first rotating shaft driven by the first servo motor and a second rotating shaft driven by the second servo motor are coaxially installed on both sides of the base plate, the first rotating shaft is fixedly connected to one side of the open end of the U-shaped frame, and the other side of the open end of the U-shaped frame is rotatably connected to the second rotating shaft, one end of the connecting rod passes through the middle of the closed end of the U-shaped frame and is fixedly connected to the first bevel gear, the first bevel gear is meshed with the second bevel gear fixedly mounted on the second rotating shaft, the other end of the connecting rod is fixedly connected to the side of the adjustment plate, and the bottom surface of the adjustment plate is connected to the spray nozzle through a vertical telescopic sleeve.

[0006] A further preferred solution of the present invention is that the fixed ends of the first servo motor and the second servo motor are respectively fixedly mounted on opposite back surfaces of the support plate, and the output ends of the first servo motor and the second servo motor pass through the support plate and are fixedly connected to the first rotating shaft and the second rotating shaft.

[0007] A further preferred solution of the present invention is as follows: a sleeve rod is sleeved on the outer side of one end close to the first rotating shaft and the second rotating shaft, two guide grooves are provided on the first rotating shaft, the sleeve rod is slidably installed on the guide groove, and the first transmission gear and the second transmission gear are fixedly installed at both ends of the sleeve rod, the middle part of the sleeve rod is rotatably connected to the guide rod, the guide rod is fixedly connected to the output shaft of the first cylinder, and the fixed end of the first cylinder is fixedly connected to the base plate.

[0008] A further preferred solution of the present invention is: a slide groove is provided on the adjustment plate, a screw rod is rotatably installed in the slide groove, the threads at both ends of the screw rod are rotated in opposite directions, the front and rear ends of the screw rod are screwed with protective shells, the top of the protective shell is slidably installed in the slide groove, and the two protective shells correspond to each other.

[0009] A further preferred solution of the present invention is that one end of the screw rod passes through the connecting rod and the first gear in sequence and is fixedly connected to the face gear, and the face gear cooperates with the first transmission gear and the second transmission gear.

[0010] A further preferred solution of the present invention is that ratchets are fixedly installed on both sides of the open end of the U-shaped frame, and two pawls controlled by double-headed and double-outlet cylinders are installed on the first rotating shaft and the second rotating shaft, and the pawls cooperate with the ratchets.

[0011] The present invention has the following benefits: 1. The present invention adjusts the angle by controlling the adjustment plate through the adjustment component, thereby solving the problem of fixed angle of the spray nozzle and increasing the flexibility and practicality of the device.

[0012] 2. The present invention controls the rotation of the screw by the first servo motor, thereby controlling the protective shell to move toward the center to protect the spray nozzle or to move toward both sides to allow the spray nozzle to work, thereby increasing the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 Schematic diagram of the top view of the adjustment assembly of the present invention; Figure 3 This is a schematic diagram of the enlarged structure of part A of the present invention; Figure 4 This is a schematic diagram of the enlarged structure of part B of the present invention; Figure 5 is a schematic side sectional structural diagram of the first rotating shaft of the present invention; Figure 6 Schematic diagram of the bottom structure of the adjustment plate of the present invention; In the figure: 1-plant protection drone, 2-spray box, 3-adjustment plate, 4-spray nozzle, 5-adjustment assembly, 6-vertical telescopic sleeve, 7-conduit, 8-connecting rod, 9-base plate, 10-support plate, 11-first servo motor, 12-second servo motor, 13-U-shaped frame, 14-first rotating shaft, 15-second rotating shaft, 16-first bevel gear, 17-second bevel gear, 18-sleeve rod, 19-face gear, 20-screw, 21-first transmission gear, 22-guide rod, 23-first cylinder, 24-ratchet, 25-pawl, 26-double-head double-outlet cylinder, 27-chute, 28-protective shell. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] according to Figure 1-6As shown, a multi-angle spraying mechanism of a plant protection drone includes a spray box 2 arranged under the plant protection drone 1 and a spray nozzle 4 connected to the spray box 2 through a conduit 7. The bottom surface of the spray box 2 is fixedly installed with an adjustment component 5. The adjustment component 5 includes a base plate 9, a support plate 10, a first servo motor 11, a second servo motor 12, a first bevel gear 16, a second bevel gear 17, a U-shaped frame 13, a first rotating shaft 14 and a second rotating shaft 15. The first rotating shaft 14 driven by the first servo motor 11 is coaxially installed on both sides of the base plate 9. And the second rotating shaft 15 driven by the second servo motor 12, the first rotating shaft 14 is fixedly connected to one side of the open end of the U-shaped frame 13, the other side of the open end of the U-shaped frame 13 is rotatably connected to the second rotating shaft 15, one end of the connecting rod 8 passes through the middle of the closed end of the U-shaped frame 13 and is fixedly connected to the first bevel gear 16, the first bevel gear 16 is engaged with the second bevel gear 17 fixedly mounted on the second rotating shaft 15, the other end of the connecting rod 8 is fixedly connected to the side of the adjusting plate 3, and the bottom surface of the adjusting plate 3 is connected to the spray nozzle 4 through the vertical telescopic sleeve 6.

[0016] The fixed ends of the first servo motor 11 and the second servo motor 12 are fixedly mounted on opposite back surfaces of the support plate 10 , and the output ends of the first servo motor 11 and the second servo motor 12 pass through the support plate 10 and are fixedly connected to the first rotating shaft 14 and the second rotating shaft 15 .

[0017] A sleeve rod 18 is sleeved on the outer side of one end near the first rotating shaft 14 and the second rotating shaft 15. Two guide grooves are provided on the first rotating shaft 14, and the sleeve rod 18 is slidably installed on the guide groove. The first rotating shaft 14 can control the rotation of the sleeve rod 18, and the rotation of the sleeve rod 18 does not affect the rotation of the second rotating shaft 14. The first transmission gear 21 and the second transmission gear are fixedly installed at both ends of the sleeve rod 18. The middle part of the sleeve rod 18 is rotatably connected with the guide rod 22. The rotation of the sleeve rod 18 cannot drive the guide rod 22 to rotate, and the rotation of the sleeve rod 18 does not affect the guide rod 22. The guide rod 22 is fixedly connected to the output shaft of the first cylinder 23. The first cylinder 23 can control the guide rod 22 to move, thereby moving the position of the first transmission gear 21 and the second transmission gear, so that the first transmission gear 21 is engaged with the face gear 19, or the second transmission gear is engaged with the face gear 19, or neither the first transmission gear 21 nor the second transmission gear is engaged with the face gear 19. The fixed end of the first cylinder 23 is fixedly connected to the base plate 9.

[0018] A slide groove 27 is provided on the adjustment plate 3, and a screw rod 20 is rotatably installed in the slide groove 27. The threads at both ends of the screw rod 20 rotate in opposite directions. This arrangement can ensure that when the screw rod 20 rotates forward, the protective shells 28 at both ends of the screw rod 120 move toward the middle at the same time. When the screw rod 20 rotates reversely, the protective shells 28 at both ends of the screw rod 20 move toward both ends at the same time, and the middle threads of the screw rod 20 are not connected. This arrangement is for the stability of the protection shell 28 and to ensure the working range of the protection shell 28. The front and rear ends of the screw rod 20 are both screwed with protective shells 28, and the top of the protective shell 28 is slidably installed in the slide groove 27, and the two protective shells 28 correspond to each other.

[0019] One end of the screw rod 20 passes through the connecting rod 8 and the first gear and is fixedly connected to the face gear 19 in sequence. The rotation of the screw rod 20 is not controlled by the connecting rod 8. The face gear 19 cooperates with the first transmission gear 21 and the second transmission gear. When the face gear 19 is engaged with the first transmission gear 21, the first transmission gear 21 drives the face gear 19 to rotate forward, and the screw rod 20 rotates forward. When the face gear 19 is engaged with the second transmission gear, the second transmission gear drives the face gear 19 to rotate reversely, and the screw rod 20 rotates reversely. The first transmission gear 21 and the second transmission gear are both driven by the first servo motor to rotate forward.

[0020] Ratchets 24 are fixedly installed on both sides of the open end of the U-shaped frame 13, and two pawls 25 controlled by a double-headed double-outlet air cylinder 26 are installed on the first rotating shaft 14 and the second rotating shaft 15. The pawls 25 cooperate with the ratchet 24, and the pawls 25 are symmetrically arranged on both sides of the ratchet 24. When the double-headed double-outlet air cylinder 26 is not working, the pawls 25 are engaged with the ratchet 24. When the double-headed double-outlet air cylinder 26 is working, the pawls 25 are separated from the ratchet 24.

[0021] Working principle: When work is required, the double-headed and double-outlet air cylinder 26 on the first rotating shaft 14 works, the ratchet 25 on one side of the first rotating shaft 14 is separated from the ratchet 24, and the first cylinder 23 controls the guide rod 22 to move, the sleeve rod 18 moves on the first rotating shaft 14, the second transmission gear is engaged with the face gear 19, the first servo motor 11 starts to work, the second transmission gear drives the face gear 19 to rotate in the opposite direction, the screw rod 20 rotates in the opposite direction, and the protective shells 28 at both ends of the screw rod 20 move to both ends at the same time, and the spray nozzle 4 can work. When the tilt angle of the spray nozzle 4 in the front and rear directions needs to be adjusted, the second servo motor 12 is controlled to work, the first servo motor 11 does not work, and the second servo motor 12 drives the second umbrella through the second rotating shaft 15 The gear 17 rotates, and the second bevel gear 17 drives the first bevel gear 16 to rotate, ensuring that the adjustment plate 3 changes the inclination angle, so that the sprinkler head 4 changes the inclination angle in the front-to-back direction, and controls the vertical telescopic sleeve 6 to make the sprinkler head 4 work; when it is necessary to adjust the inclination angle of the sprinkler head 4 in the left and right directions, the first servo motor 11 and the second servo motor 12 are controlled to work, and the first servo motor 11 drives the U-shaped frame 13 to rotate through the first rotating shaft 14, and the second servo motor 12 drives the second bevel gear 17 to rotate through the second rotating shaft 15 to limit the first bevel gear 16, ensuring that the inclination angle of the sprinkler head 4 in the left and right directions is changed. As needed, the first servo motor 11 and the second servo motor 12 are adjusted at the same time to ensure the same speed.

[0022] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multi-angle spraying mechanism for a plant protection drone, characterized by: The invention comprises a spray box (2) arranged under a plant protection drone (1) and a spray nozzle (4) connected to the spray box (2) through a conduit (7); an adjustment assembly (5) is fixedly installed on the bottom surface of the spray box (2); the adjustment assembly (5) comprises a base plate (9), a support plate (10), a first servo motor (11), a second servo motor (12), a first bevel gear (16), a second bevel gear (17), a U-shaped frame (13), a first rotating shaft (14) and a second rotating shaft (15); the first rotating shaft (14) driven by the first servo motor (11) and the second rotating shaft (15) are coaxially mounted on both sides of the base plate (9). The motor (12) drives the second rotating shaft (15), the first rotating shaft (14) is fixedly connected to one side of the open end of the U-shaped frame (13), the other side of the open end of the U-shaped frame (13) is rotatably connected to the second rotating shaft (15), one end of the connecting rod (8) passes through the middle of the closed end of the U-shaped frame (13) and is fixedly connected to the first bevel gear (16), the first bevel gear (16) is engaged with the second bevel gear (17) fixedly mounted on the second rotating shaft (15), the other end of the connecting rod (8) is fixedly connected to the side of the adjusting plate (3), and the bottom surface of the adjusting plate (3) is connected to the spray nozzle (4) through the vertical telescopic sleeve (6).

2. The multi-angle spraying mechanism of a plant protection drone according to claim 1, characterized in that: The fixed ends of the first servo motor (11) and the second servo motor (12) are respectively fixedly mounted on opposite back surfaces of the support plate (10), and the output ends of the first servo motor (11) and the second servo motor (12) pass through the support plate (10) and are fixedly connected to the first rotating shaft (14) and the second rotating shaft (15).

3. The multi-angle spraying mechanism of a plant protection drone according to claim 2, characterized in that: A sleeve rod (18) is sleeved on the outer side of one end adjacent to the first rotating shaft (14) and the second rotating shaft (15). Two guide grooves are provided on the first rotating shaft (14). The sleeve rod (18) is slidably mounted on the guide grooves. A first transmission gear (21) and a second transmission gear are fixedly mounted on both ends of the sleeve rod (18). The middle portion of the sleeve rod (18) is rotatably connected to the guide rod (22). The guide rod (22) is fixedly connected to the output shaft of the first cylinder (23). The fixed end of the first cylinder (23) is fixedly connected to the base plate (9).

4. The multi-angle spraying mechanism of a plant protection drone according to claim 1, characterized in that: A slide groove (27) is provided on the adjustment plate (3), and a screw rod (20) is rotatably installed in the slide groove (27). The threads at both ends of the screw rod (20) are rotated in opposite directions. The front and rear ends of the screw rod (20) are both screwed with protective shells (28). The top of the protective shell (28) is slidably installed in the slide groove (27), and the two protective shells (28) correspond to each other.

5. The multi-angle spraying mechanism of a plant protection drone according to claim 4, characterized in that: One end of the screw rod (20) passes through the connecting rod (8) and the first gear and the face gear (19) in sequence and is fixedly connected. The face gear (19) cooperates with the first transmission gear (21) and the second transmission gear.

6. The multi-angle spraying mechanism of a plant protection drone according to claim 1, characterized in that: Ratchets (24) are fixedly mounted on both sides of the open end of the U-shaped frame (13), and two ratchets (25) controlled by a double-headed double-outlet cylinder (26) are mounted on the first rotating shaft (14) and the second rotating shaft (15), and the ratchets (25) cooperate with the ratchets (24).

Images