Unmanned aerial vehicle variable rate fertilization device

Abstract

The utility model relates to an unmanned aerial vehicle variable rate fertilization device which comprises a body, four groups of propeller driving pairs are arranged on the outer side of the body in the circumferential direction, a hollow cavity used for containing fertilizer is formed in the body, the middle of the body is rotationally connected with a rotating shaft penetrating through the body, and a discharging pipe is arranged at the lower end of the body. A feeding port and a transmission box are arranged at the upper end of the body, a telescopic device for driving a rotating shaft to ascend and descend is arranged in the transmission box, a conical cam is arranged at the lower end of the rotating shaft, a guide groove is formed in the inner side of a discharging pipe, and a valve plate penetrating through the guide groove is elastically connected into the guide groove. The telescopic output end of the telescopic device is controlled to stretch out and draw back to drive the conical cam to ascend and descend, the conical cam extrudes the valve plate to adjust the length of the valve plate inserted into the discharging pipe, then the opening size of the discharging pipe is adjusted, the fertilizer discharging speed is controlled, and then variable fertilization is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural drones, and particularly relates to a variable-rate fertilization device for drones. Background Art

[0002] A plant protection drone, also known as an unmanned aerial vehicle, as the name implies, is an unmanned aircraft used for agricultural and forestry plant protection operations. This type of unmanned aircraft consists of a flight platform (fixed-wing, helicopter, multi-rotor aircraft), a navigation and flight control system, and a spraying mechanism. Through ground remote control or navigation and flight control, spraying operations can be achieved, and agents, seeds, powders, etc. can be sprayed. With the rapid development of drone technology, the more widely defined "agricultural drone" has gradually replaced the "plant protection drone". Agricultural drones can not only be used for spraying pesticides, but also for various operations such as spreading fertilizers, seeds, and feeds, meeting the diverse needs of farmers, improving production efficiency, and strongly promoting the development, innovation, and progress of global agriculture.

[0003] Currently, the fertilization method of existing drone fertilization equipment is relatively single, often quantitative fertilization. However, in the actual fertilization process, variable fertilization needs to be carried out according to different cultivated crops or different soil types. This increases the difficulty of drone fertilization, making it difficult to control the fertilizer application rate during fertilization and difficult to truly achieve variable-rate fertilization. Summary of the Utility Model

[0004] The embodiment of the utility model provides a variable-rate fertilization device for drones. According to the variety of cultivated crops or soil conditions, the fertilizer application rate is controlled by adjusting the opening size of the material discharge pipe, thereby achieving variable-rate fertilization. This can solve the problem in the prior art that it is difficult to control the fertilizer application rate during drone fertilization, and thus difficult to achieve variable-rate fertilization.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions: A variable-rate fertilization device for drones includes a main body. Four groups of propeller drive pairs are circumferentially arranged on the outer side of the main body. The inside of the main body is a hollow chamber for accommodating fertilizers. A rotating shaft passing through the main body is rotatably connected to the middle of the main body. A material discharge pipe is arranged at the lower end of the main body. An inlet and a transmission box are arranged at the upper end of the main body. A telescopic device for driving the rotating shaft to move up and down is arranged inside the transmission box. A conical cam is arranged at the lower end of the rotating shaft. A guide groove is arranged inside the material discharge pipe. A valve plate passing through the guide groove is elastically connected inside the guide groove. One end of the valve plate close to the conical cam is in close contact with the conical cam under the elastic force.

[0006] Preferably, a limiting groove is arranged inside the guide groove. A sliding block slidingly connected to the limiting groove is arranged on the valve plate. A spring is arranged between the sliding block and the inner side wall of the limiting groove.

[0007] Preferably, it further includes two anti-drift plates arranged oppositely and two connecting rods. The upper ends of the two anti-drift plates are hinged to the body, one end of the connecting rod is hinged to the lower end of the rotating shaft, and the other end of the connecting rod is hinged to the lower half of the anti-drift plate.

[0008] Preferably, a bushing is rotatably connected to the middle of the upper end of the body. A keyway is provided on the inner surface of the bushing, and a key slidably connected to the keyway is provided on the rotating shaft.

[0009] Preferably, a motor is provided at the output end of the telescopic device. The rotating shaft is provided at the output end of the motor. A driving gear is provided at the upper part of the bushing. A driven shaft whose lower end extends into the feeding pipe is rotatably connected to the body. A dredging tooth is provided on the driven shaft, and a driven gear meshing with the driving gear is provided at the upper end of the driven shaft.

[0010] Preferably, a mounting plate is provided at the lower part of the bushing, and a crushing rod is provided on the mounting plate.

[0011] Preferably, the telescopic device is an electric telescopic rod or a cylinder.

[0012] Compared with the prior art, through the cooperative setting of the body, the propeller driving pair, the hollow chamber, the feeding pipe, the feeding port, the transmission box, the telescopic device, the rotating shaft, the conical cam, the guiding groove and the valve plate, according to the cultivated crop variety or soil condition, the output end of the telescopic device is controlled to stretch and drive the conical cam to rise and fall. By squeezing the valve plate with the conical cam, the length inserted into the feeding pipe is adjusted, and further the opening size of the feeding pipe is adjusted to realize the control of the fertilizer application rate, and thus variable fertilization is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the schematic front sectional structure view of the present utility model;

[0014] Figure 2 is the schematic structure view of the bushing of the present utility model;

[0015] Figure 3 is the schematic structure view of the rotating shaft of the present utility model.

[0016] In the figure: 1, body; 2, propeller driving pair; 3, hollow chamber; 4, feeding port; 5, feeding pipe; 6, transmission box; 7, telescopic device; 8, motor; 9, rotating shaft; 10, conical cam; 11, guiding groove; 12, valve plate; 13, anti-drift plate; 14, connecting rod; 15, bushing; 16, keyway; 17, key; 18, driving gear; 19, driven shaft; 20, dredging tooth; 21, driven gear; 22, mounting plate; 23, crushing rod; 24, limiting groove; 25, slider; 26, spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the technical solution of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0018] As Figures 1 to 3 shown, a variable-rate fertilization device for an unmanned aerial vehicle includes a main body 1. Four groups of propeller drive pairs 2 are arranged on the outer circumference of the main body 1. The inside of the main body 1 is a hollow chamber 3 for accommodating fertilizers. A rotating shaft 9 passing through the main body 1 is rotatably connected to the middle of the main body 1. A blanking pipe 5 is arranged at the lower end of the main body 1. An inlet 4 and a transmission box 6 are arranged at the upper end of the main body 1. An expansion device 7 for driving the lifting of the rotating shaft 9 is arranged inside the transmission box 6. A conical cam 10 is arranged at the lower end of the rotating shaft 9. A guide groove 11 is arranged inside the blanking pipe 5. A valve plate 12 passing through the guide groove 11 is elastically connected inside the guide groove 11. One end of the valve plate 12 close to the conical cam 10 is in close contact with the conical cam 10 under the elastic force.

[0019] During specific use, according to the cultivated crop variety or soil conditions, control the expansion and contraction of the output end of the expansion device 7 to drive the lifting of the conical cam 10, and adjust the length inserted into the blanking pipe 5 by squeezing the valve plate 12 with the conical cam 10, so as to adjust the opening size of the blanking pipe 5, realize the control of the fertilizer application rate, and thus realize variable-rate fertilization.

[0020] To achieve the purpose of variable-rate fertilization, preferably, a limiting groove 24 is opened inside the guide groove 11, a slider 25 slidably connected to the limiting groove 24 is arranged on the valve plate 12, and a spring 26 is arranged between the slider 25 and the inner side wall of the limiting groove 24.

[0021] To achieve the purpose of preventing fertilizer waste, preferably, it further includes two oppositely arranged anti-drift plates 13 and two connecting rods 14. The upper ends of the two anti-drift plates 13 are hinged to the main body 1. One end of the connecting rod 14 is hinged to the lower end of the rotating shaft 9, and the other end of the connecting rod 14 is hinged to the lower half of the anti-drift plate 13. The telescopic end of the telescopic device 7 telescopically drives the rotating shaft 9 to rise and fall, and the rotating shaft 9 drives the anti-drift plate 13 to rotate inwards or outwards, changing the angle of the anti-drift plate 13, so that when the fertilizer application rate is large, the lower opening of the anti-drift plate 13 is larger, improving the uniformity of fertilizer application. When the fertilizer application rate is small, the lower opening of the anti-drift plate 13 is smaller, realizing concentrated fertilization, and at the same time playing a role in preventing fertilizer from drifting with the wind, saving fertilizer.

[0022] To achieve the purpose of variable rate fertilization, preferably, a bushing 15 is rotatably connected to the middle of the upper end of the main body 1. A keyway 16 is provided on the inner surface of the bushing 15, and a key 17 slidably connected to the keyway 16 is provided on the rotating shaft 9.

[0023] The output end of the telescopic device 7 is provided with a motor 8, the rotating shaft 9 is arranged at the output end of the motor 8, a driving gear 18 is arranged on the upper part of the bushing 15, a driven shaft 19 whose lower end extends into the feeding pipe 5 is rotatably connected to the main body 1, a dredging tooth 20 is arranged on the driven shaft 19, a driven gear 21 meshing with the driving gear 18 is arranged at the upper end of the driven shaft 19, a mounting plate 22 is arranged at the lower part of the bushing 15, and a crushing rod 23 is arranged on the mounting plate 22.

[0024] During use, according to the cultivated crop variety or soil conditions, control the telescopic output end of the telescopic device 7 to drive the conical cam 10 to rise and fall, and adjust the length inserted into the feeding pipe 5 by squeezing the valve plate 12 through the conical cam 10, thereby adjusting the opening size of the feeding pipe 5 to achieve the control of the fertilizer application rate. Then start the motor 8, the motor 8 drives the rotating shaft 9 to rotate, the rotating shaft 9 drives the bushing 15 to rotate through the keyway 16 and the key 17, the bushing 15 drives the driving gear 18 and the mounting plate 22 to rotate synchronously, the mounting plate 22 drives the crushing rod 23 to rotate to break up the agglomerated fertilizer, and the broken-up fertilizer flows out from the feeding pipe 5. The driving gear 18 drives the dredging tooth 20 on the driven shaft 19 to rotate through the driven gear 21, and synchronously dredges the feeding pipe 5 to prevent the feeding pipe 5 from being blocked by fertilizer.

[0025] Preferably, the telescopic device 7 is an electric telescopic rod or a cylinder.

[0026] Compared with the prior art, the utility model is provided with a cooperation of a body 1, a propeller drive pair 2, a hollow chamber 3, a blanking pipe 5, a feed inlet 4, a transmission box 6, a telescopic device 7, a rotating shaft 9, a conical cam 10, a guide groove 11 and a valve plate 12. According to the cultivated crop variety or soil condition, the telescopic output end of the telescopic device 7 is controlled to stretch and drive the conical cam 10 to rise and fall. The length inserted into the blanking pipe 5 is adjusted by the extrusion of the conical cam 10 on the valve plate 12, so as to adjust the opening size of the blanking pipe 5, realize the control of the fertilizer application rate, and further realize variable fertilization.

[0027] The above are only the preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An unmanned aerial vehicle variable-rate fertilizer application device, comprising a body (1), wherein four sets of propeller drive pairs (2) are arranged on the outer circumference of the body (1), and characterized in that: The interior of the body (1) is a hollow chamber (3) for accommodating fertilizers. The middle part of the body (1) is rotatably connected to a rotating shaft (9) that passes through the body (1). The lower end of the body (1) is provided with a feeding pipe (5). The upper end of the body (1) is provided with a feeding port (4) and a transmission box (6). The transmission box (6) is provided with a telescopic device (7) for driving the rotating shaft (9) to rise and fall. The lower end of the rotating shaft (9) is provided with a conical cam (10). The inner side of the feeding pipe (5) is provided with a guide groove (11). The interior of the guide groove (11) is elastically connected to a valve plate (12) that passes through the guide groove (11). One end of the valve plate (12) close to the conical cam (10) is in close contact with the conical cam (10) under the elastic force.

2. The variable-rate fertilization device of an unmanned aerial vehicle according to claim 1, characterized in that: A limiting groove (24) is provided inside the guide groove (11), a sliding block (25) slidably connected to the limiting groove (24) is provided on the valve plate (12), and a spring (26) is provided between the sliding block (25) and the inner side wall of the limiting groove (24).

3. The variable-rate fertilization device of an unmanned aerial vehicle according to claim 1 or 2, characterized in that: It also includes two anti-drift plates (13) and two connecting rods (14) arranged opposite to each other, wherein the upper ends of the two anti-drift plates (13) are hinged to the main body (1), one end of the connecting rod (14) is hinged to the lower end of the rotating shaft (9), and the other end of the connecting rod (14) is hinged to the lower half of the anti-drift plate (13).

4. The variable-rate fertilization device of an unmanned aerial vehicle according to claim 3, characterized in that: A shaft sleeve (15) is rotatably connected to the middle of the upper end of the body (1), a key slot (16) is provided on the inner surface of the shaft sleeve (15), and a key (17) slidably connected to the key slot (16) is provided on the rotating shaft (9).

5. The variable-rate fertilization device of an unmanned aerial vehicle according to claim 4, characterized in that: The output end of the telescopic device (7) is provided with a motor (8), the rotating shaft (9) is provided at the output end of the motor (8), the upper part of the shaft sleeve (15) is provided with a driving gear (18), the main body (1) is rotatably connected with a driven shaft (19) whose lower end extends into the feeding tube (5), the driven shaft (19) is provided with dredging teeth (20), and the upper end of the driven shaft (19) is provided with a driven gear (21) meshing with the driving gear (18).

6. The variable-rate fertilization device of an unmanned aerial vehicle according to claim 5, characterized in that: A mounting plate (22) is provided at the lower part of the shaft sleeve (15), and a crushing rod (23) is provided on the mounting plate (22).

7. The variable-rate fertilization device of an unmanned aerial vehicle according to claim 6, characterized in that: The telescopic device (7) is an electric telescopic rod or a cylinder.

Images