A stable plant protection spraying drone

Abstract

The application provides a stable plant protection spraying unmanned plane, and relates to the technical field of plant protection unmanned planes. The stable plant protection spraying unmanned plane comprises a unmanned plane main body, a plurality of first connecting pieces are fixedly arranged in the unmanned plane main body, a plurality of supporting arms are fixedly arranged in the first connecting pieces, a plurality of second connecting pieces are fixedly arranged at the ends of the supporting arms away from each other, flight motors are fixedly arranged at the upper ends of the second connecting pieces, paddles are fixedly arranged at the output ends of the flight motors, heat dissipation mechanisms are sleeved outside the flight motors, a storage mechanism is fixedly arranged at the lower end of the unmanned plane main body, and a medicine pump is fixedly arranged at the upper end of the storage mechanism. The structure is stable, light in weight, low in energy consumption, efficient in heat dissipation, compatible in liquid medicine cooling and spraying, capable of reducing liquid medicine shaking, stable in taking off and landing, uniform in spraying, and convenient in operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plant protection unmanned aerial vehicles, in particular to a stable plant protection spraying unmanned aerial vehicle. BACKGROUND

[0002] In the process of agricultural modernization, using unmanned aerial vehicles for large-scale pesticide spraying on crops has become the most efficient spraying method, which has significant advantages in spraying efficiency and uniformity, and is incomparable with traditional spraying methods. However, there are still many problems to be solved in the actual application of existing plant protection unmanned aerial vehicles.

[0003] In terms of heat dissipation, during the flight of the current plant protection unmanned aerial vehicle, the motor mainly relies on the wind during the flight process for heat dissipation. However, in actual operation, especially in high-temperature environments or long-time continuous operation, the effect of wind cooling is extremely limited. During the operation of the motor of the unmanned aerial vehicle, a large amount of heat is generated due to the current passing through the winding and mechanical friction. When the heat cannot be dissipated in time and effectively, the temperature of the motor will continue to rise. For example, when long-time pesticide spraying operation is carried out in hot summer, the temperature of the motor may exceed its normal working temperature range in a short time. The high temperature will cause the resistance of the motor winding to increase, thereby increasing the current and reducing the output power and efficiency of the motor. At the same time, high temperature will also accelerate the aging of the internal insulation material of the motor, shorten the service life of the motor, and even cause motor failure, leading to unmanned aerial vehicle flight accidents.

[0004] In terms of the design of the pesticide tank, the existing plant protection unmanned aerial vehicle is usually equipped with a simple hollow pesticide tank. Due to the frequent starting, stopping and turning of the unmanned aerial vehicle during flight, the body is prone to tilt. In these cases, the pesticide liquid in the tank will shake and the center of gravity will shift under the action of inertia. For example, when the unmanned aerial vehicle makes a sharp turn, the pesticide liquid in the tank will gather to one side due to inertia, causing the center of gravity of the unmanned aerial vehicle to change and affecting the flight stability. Moreover, the shaking pesticide liquid will also produce a water hammer effect in the tank, that is, the liquid will produce a large impact force on the tank wall due to sudden changes in flow velocity during flow. This impact force not only aggravates the wear of the tank, but also further disturbs the flight state of the unmanned aerial vehicle, increasing the risk of flight accidents. In addition, unstable flight state will also lead to uneven pesticide spraying, affecting the effect of crop disease and pest control.

[0005] In summary, the existing plant protection unmanned aerial vehicle has obvious deficiencies in heat dissipation and tank stability, which seriously limits its operation efficiency, safety and service life, and a new technical solution is urgently needed to solve these problems. SUMMARY

[0006] Technical problems solved:

[0007] In view of the deficiencies of the prior art, the stable plant protection spraying unmanned aerial vehicle is provided to solve the problems of insufficient motor heat dissipation, short service life, flight instability caused by liquid medicine shaking, large take-off and landing impact and uneven spraying.

[0008] Technical scheme:

[0009] To achieve the above object, the stable plant protection spraying unmanned aerial vehicle is realized by the following technical scheme: a stable plant protection spraying unmanned aerial vehicle, comprising a unmanned aerial vehicle main body, a plurality of first connecting pieces are fixedly arranged inside the unmanned aerial vehicle main body, a plurality of support arms are fixedly arranged inside the first connecting pieces, a plurality of second connecting pieces are fixedly arranged at the ends of the support arms away from each other, a plurality of flight motors are fixedly arranged at the upper ends of the second connecting pieces, a plurality of paddle blades are fixedly arranged at the output ends of the flight motors, and a plurality of heat dissipation mechanisms are sleeved outside the flight motors.

[0010] A storage mechanism is fixedly arranged at the lower end of the unmanned aerial vehicle main body, a medicine pump is fixedly arranged at the upper end of the storage mechanism, the output end of the medicine pump is connected to the inside of the heat dissipation mechanism, the input end of the medicine pump is connected to the inside of the storage mechanism, the storage mechanism comprises a protective outer frame, an upper connecting frame is fixedly arranged at the upper end of the protective outer frame, the upper connecting frame is fixedly connected to the unmanned aerial vehicle main body at the upper end, two L-shaped steels are fixedly arranged inside the upper connecting frame, a buffer frame is rotatably arranged between the two L-shaped steels, a buffer inner frame is rotatably arranged inside the buffer frame, the top end of the buffer inner frame is closed and penetrates the input end pipe of the medicine pump, and a plurality of spoilers are fixedly arranged at the inner bottom of the buffer inner frame.

[0011] Preferably, a supplement port is penetratively arranged at one side of the protective outer frame, and the supplement port is connected to the inside of the buffer inner frame through a corrugated pipe.

[0012] Preferably, a spring damper is ball-jointedly arranged at the lower end of the buffer inner frame at the middle position, and the lower end of the spring damper is ball-jointedly arranged at the middle position of the inner bottom of the protective outer frame.

[0013] Preferably, the heat dissipation mechanism comprises a heat-absorbing spiral frame, the heat-absorbing spiral frame is made of copper, and the heat-absorbing spiral frame is spirally wound outside the flight motor.

[0014] Preferably, a first transmission pipe is fixedly arranged at one end of the heat-absorbing spiral frame, the first transmission pipe is connected to the output end of the medicine pump, a second transmission pipe is fixedly arranged at the other end of the heat-absorbing spiral frame, the other end of the second transmission pipe is fixedly arranged with a medicine spraying head, and the medicine spraying head is fixedly arranged at the lower end of the second connecting piece.

[0015] Preferably, two lower support feet are fixedly arranged at the lower end of the unmanned aerial vehicle main body.

[0016] Beneficial effects:

[0017] The application provides a stable plant protection spraying unmanned aerial vehicle.

[0018] 1. The application provides a stable plant protection spraying unmanned aerial vehicle, the medicine pump pumps the medicine into the heat absorbing spiral frame, the heat absorbing spiral frame is made of copper material, has good heat conduction performance, and is wound around the outside of the flight motor in a large area. In this way, the heat generated by the flight motor can be quickly absorbed by the heat absorbing spiral frame, and the heat is transferred to the medicine through heat exchange with the medicine. Compared with the traditional air cooling heat dissipation method, the heat dissipation efficiency is greatly improved. Experimental tests show that under the same continuous operation conditions, the temperature of the motor of the unmanned aerial vehicle using the heat dissipation mechanism of the application can be greatly reduced, effectively avoiding the performance degradation and service life shortening problems caused by overheating of the motor, significantly prolonging the service life of the motor, reducing the maintenance cost of the unmanned aerial vehicle, and improving the reliability and stability of the unmanned aerial vehicle operation.

[0019] 2. The application provides a stable plant protection spraying unmanned aerial vehicle, when the unmanned aerial vehicle tilts during flight, the buffer inner frame will be offset under the drive of the L-shaped steel and the buffer frame, and the spring damper will play a role to buffer and reset the offset of the buffer inner frame. Specifically, when the unmanned aerial vehicle makes a sharp turn and the fuselage tilts, the buffer inner frame can adjust the angle in time to reduce the shaking of the medicine caused by inertia. In addition, the spoiler inside the buffer inner frame can effectively block the flow of the medicine, further inhibiting the shaking of the medicine. Experimental data show that the unmanned aerial vehicle using the storage mechanism of the application greatly reduces the shaking amplitude of the medicine during flight compared with the traditional medicine tank, thereby improving the stability of the unmanned aerial vehicle flight, ensuring that the pesticide spraying operation can be carried out in a stable flight state, improving the uniformity and accuracy of pesticide spraying, and ensuring the effect of crop disease and pest control. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the shaft side of the application;

[0021] Figure 2 is a schematic view of the shaft side of the storage mechanism of the application;

[0022] Figure 3 is a top view of the storage mechanism of the application;

[0023] Figure 4 is an exploded view of the storage mechanism of the application;

[0024] Figure 5 is a schematic view of the shaft side of the buffer inner frame of the application;

[0025] Figure 6 is a schematic view of the shaft side of the heat dissipation mechanism of the application.

[0026] Wherein, 1, unmanned aerial vehicle main body; 2, support arm; 3, flight motor; 4, storage mechanism; 5, lower support foot; 6, heat dissipation mechanism; 7, first connecting piece; 8, second connecting piece; 9, paddle; 401, upper connecting frame; 402, L-shaped steel; 403, supplementary port; 404, protective outer frame; 405, buffer inner frame; 406, spoiler; 407, buffer frame; 408, spring damper; 601, heat absorption spiral frame; 602, first transmission pipe; 603, second transmission pipe; 604, medicine spraying head. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] As Figures 1-6 shown, the present application provides a stable spraying unmanned aerial vehicle for plant protection, which comprises an unmanned aerial vehicle main body 1, a plurality of first connecting pieces 7 are fixedly arranged inside the unmanned aerial vehicle main body 1, the first connecting pieces 7 are evenly distributed in a ring shape, are made of high-strength alloy material, are fixed to the inner wall of the unmanned aerial vehicle main body 1 by bolts, and the connection strength can reach 200-300 MPa, which can effectively disperse the load transmitted by the support arms 2. A plurality of support arms 2 are fixedly arranged inside the first connecting pieces 7, the support arms 2 are hollow tubular structures, have an outer diameter of 30-40 mm and an inner diameter of 20-25 mm, are made of carbon fiber composite material, and while ensuring that the bending strength is ≥300 MPa, the weight of the support arms 2 is greatly reduced. A second connecting piece 8 is fixedly arranged at the end of each support arm 2 away from the other, the second connecting piece 8 is fixed to the support arm 2 by welding, and the tensile strength at the welded joint is ≥150 MPa. A flight motor 3 is fixedly arranged at the upper end of each second connecting piece 8, the flight motor 3 is a brushless motor, has a rated voltage of 24-48 V, a rated power of 500-1000 W, and a rotating speed range of 3000-6000 r / min, is fastened to the second connecting piece 8 by bolts, and the perpendicularity error of installation is ≤0.5 mm / m. A paddle 9 is fixedly arranged at the output end of each flight motor 3, the paddle 9 is made of glass fiber reinforced plastic, has a diameter of 500-800 mm and a chord length of 80-120 mm, and can generate a lift of 50-100 N. A heat dissipation mechanism 6 is sleeved outside each flight motor 3;

[0029] Specifically, in the above-described embodiment, the first connector 7 and the second connector 8 rigidly connect the support arm 2 to the drone body 1 and the flight motor 3 to form a stable mechanical structure. When powered, the flight motor 3 drives the propeller blades 9 to rotate at high speed, generating upward lift and forward thrust using aerodynamic principles, enabling the drone to take off, land, and fly. The heat dissipation mechanism 6 is mounted on the exterior of the flight motor 3, directly contacting the motor housing to absorb heat. The evenly distributed first connector 7 and support arm 2 ensure balanced force distribution on the drone. The carbon fiber support arm 2 combines high strength and lightweight properties, reducing energy consumption. The brushless flight motor 3 is highly efficient and long-lasting, and when combined with the large-sized propeller blades 9, it can provide sufficient power. The heat dissipation mechanism 6 provides a foundation for heat dissipation from the motor, preventing overheating from affecting its performance.

[0030] The lower end of the drone body 1 is fixed with two lower support feet 5, which are made of rubber, with a height of 100-150mm and a bottom contact area of ​​100-150cm. 2 , connected to the drone body 1 by bolts through a metal bracket, the bracket thickness is 3-5mm.

[0031] Specifically, in the above-mentioned specific embodiment, the lower support foot 5 contacts the ground when the UAV takes off and lands, and uses the elastic deformation of the rubber to absorb the impact energy, while the metal bracket transfers the impact force to the UAV body 1 to disperse the load. The rubber material has good shock-absorbing and buffering properties, which can reduce the impact on the UAV body 1 and internal components during takeoff and landing; the larger bottom contact area can improve the stability of the UAV when parked and avoid tipping over.

[0032] The unmanned aerial vehicle body 1 is fixedly provided with a storage mechanism 4 at the lower end, and a medicine pump is fixedly arranged at the upper end of the storage mechanism 4. The medicine pump is a diaphragm pump with a flow rate of 1-3 L / min and a working pressure of 0.2-0.5 MPa. The medicine pump is fixed on the top of the storage mechanism 4 by bolts, and the connection sealing property of the storage mechanism 4 is ≤0.5 mL / min leakage. The output end of the medicine pump is connected to the inside of the heat dissipation mechanism 6, and the input end of the medicine pump is connected to the inside of the storage mechanism 4. The storage mechanism 4 comprises a protective outer frame 404 made of ABS engineering plastic with a wall thickness of 3-5 mm and a size of 300 mm x 200 mm x 250 mm. An upper connecting frame 401 is fixedly arranged at the upper end of the protective outer frame 404. The upper connecting frame 401 is a metal frame with a thickness of 4-6 mm, and is connected to the protective outer frame 404 and the unmanned aerial vehicle body 1 by bolts with a connection strength of ≥150 MPa. Two L-shaped steels 402 are fixedly arranged inside the upper connecting frame 401. The L-shaped steels 402 have a specification of 50 x 50 x 5 mm and are fixed to the upper connecting frame 401 by welding with a welding strength of ≥120 MPa. A buffer frame 407 is rotatably arranged between the two L-shaped steels 402. The buffer frame 407 is made of aluminum alloy and is connected to the L-shaped steels 402 by a pin shaft with a diameter of 8-10 mm and a fitting gap of 0.1-0.2 mm. A buffer inner frame 405 is rotatably arranged inside the buffer frame 407. The buffer inner frame 405 is made of plastic with a capacity of 10-15 L and a wall thickness of 2-3 mm, and is connected to the buffer frame 407 by another set of pin shafts with the same parameters as above. The top end of the buffer inner frame 405 is closed and penetrates the input end pipe of the medicine pump. The pipe is made of polyvinyl chloride with an inner diameter of 10-15 mm and a wall thickness of 2-3 mm, and is sealed at the connection with the buffer inner frame 405 by sealing glue. A plurality of spoiler plates 406 are fixedly arranged at the bottom of the buffer inner frame 405. The number of the spoiler plates 406 is 8-12, the height is 30-50 mm, the thickness is 2-3 mm, and the interval is 20-30 mm. The spoiler plates 406 are integrally formed with the buffer inner frame 405. A spring damper 408 is ball-hinged at the lower end of the buffer inner frame 405. The spring damper 408 has a stroke of 50-80 mm, a damping coefficient of 50-100 Ns / m, a spring stiffness of 1000-2000 N / m, and a ball hinge diameter of 15-20 mm at the upper end. The ball hinge at the lower end of the spring damper 408 is arranged at the middle position of the bottom of the protective outer frame 404, and has the same parameters as the ball hinge at the upper end. A supplement port 403 is arranged at one side of the protective outer frame 404. The supplement port 403 has a diameter of 30-40 mm and is connected to the inside of the buffer inner frame 405 by a corrugated pipe with a length of 100-150 mm and an inner diameter of 25-30 mm, which can withstand an internal pressure of 50-100 kPa.

[0033] Specifically, in the above specific embodiments, in the storage mechanism 4, the protective outer frame 404 provides protection for the internal components, and the upper connecting frame 401 fixes the storage mechanism 4 on the unmanned aerial vehicle body 1; the L-shaped steel 402 is rotatably connected with the buffer frame 407 and the buffer frame 407 is rotatably connected with the buffer inner frame 405, so that the buffer inner frame 405 can rotate relative to the protective outer frame 404 to adapt to the inclination of the unmanned aerial vehicle; the spring damper 408 connects the buffer inner frame 405 and the protective outer frame 404 through a spherical hinge, generates damping force and restoring force when the buffer inner frame 405 rotates, and suppresses the shaking thereof; the spoiler 406 can block the flow of the liquid medicine and destroy the inertial motion of the liquid medicine; the replenishment port 403 replenishes the liquid medicine to the buffer inner frame 405 through a corrugated pipe, and the corrugated pipe can deform with the movement of the buffer inner frame 405. The medicine pump pumps the liquid medicine in the buffer inner frame 405 out to the heat dissipation mechanism 6 through a pipeline, the protective outer frame 404 has high strength and can protect the internal structure; the combination of the rotational connection and the spring damper 408 can effectively buffer the shaking of the buffer inner frame 405, the spoiler 406 further reduces the inertial influence of the liquid medicine, and improves the flight stability of the unmanned aerial vehicle; the replenishment port 403 connected by the corrugated pipe is convenient for replenishing the liquid medicine and does not affect the movement of the buffer inner frame 405; the diaphragm medicine pump has stable flow and can reliably deliver the liquid medicine.

[0034] The heat dissipation mechanism 6 comprises a heat-absorbing spiral frame 601, which is made of red copper, has a circular cross section, a diameter of 8-10 mm, a wall thickness of 1-2 mm, 5-8 spiral turns, a pitch of 15-20 mm, and is tightly wound outside the flight motor 3, with a contact area with the motor shell of ≥100 cm 2 . One end of the heat-absorbing spiral frame 601 is fixedly provided with a first transmission pipe 602 made of polyethylene, which has an inner diameter of 8-10 mm and a length of 300-500 mm, and the first transmission pipe 602 is connected to the output end of the medicine pump. The other end of the heat-absorbing spiral frame 601 is fixedly provided with a second transmission pipe 603 having the same parameters as the first transmission pipe 602, and the other end of the second transmission pipe 603 is fixedly provided with a medicine spraying head 604 having a hole diameter of 1-2 mm and a spraying angle of 60-90°, and the medicine spraying head 604 is fixedly arranged at the lower end of the second connecting piece 8.

[0035] Specifically, in the above specific embodiments, in the heat dissipation mechanism 6, the red copper heat-absorbing spiral frame 601 absorbs the heat of the flight motor 3 due to its good thermal conductivity, and the liquid medicine delivered by the medicine pump exchanges heat with the pipe wall when flowing through the heat-absorbing spiral frame 601, thereby taking away the heat; the heat-absorbed liquid is sent to the medicine spraying head 604 through the second transmission pipe 603, and finally sprayed to complete the spraying, the red copper heat-absorbing spiral frame 601 has high heat conduction efficiency, a large contact area with the motor, and good heat dissipation effect; the liquid medicine serves as both a spraying medium and a cooling medium, achieving functional reuse and saving energy and space; the medicine spraying head 604 has a suitable spraying angle, which can ensure the spraying range and uniformity.

[0036] Working principle: when the unmanned aerial vehicle starts and begins to work, the flight motor 3 runs at high speed to generate heat. At this time, the medicine pump starts to work, and the medicine liquid in the storage mechanism 4 is pumped out and delivered to the heat-absorbing spiral frame 601 of the heat dissipation mechanism 6 through the pipeline. Since the heat-absorbing spiral frame 601 is tightly wound outside the flight motor 3 and is made of copper with high thermal conductivity, the heat generated by the flight motor 3 can be quickly transferred to the heat-absorbing spiral frame 601. Then, the heat is transferred to the medicine liquid flowing in the heat-absorbing spiral frame 601 by heat conduction. The medicine liquid absorbing heat continues to flow in the pipeline under the continuous pushing of the medicine pump, and is finally sprayed out through the medicine spraying head 604. In this process, the heat of the flight motor 3 is continuously taken out, realizing the continuous heat dissipation of the motor and ensuring the stable work of the motor in the appropriate temperature range.

[0037] Before the unmanned aerial vehicle flies, the medicine liquid is injected into the buffer inner frame 405 through the supplement port 403 on one side of the protective outer frame 404 by using the bellows. When the unmanned aerial vehicle tilts due to starting, stopping, turning and other operations during flight, the buffer inner frame 405 will produce a corresponding deviation along with the tilt direction of the fuselage under the action of the rotating connection of the two L-shaped steels 402 and the buffer bracket 407. At the same time, the spring damper 408 arranged in the middle position of the lower end of the buffer inner frame 405 starts to work, buffers and resets the deviation of the buffer inner frame 405, and reduces the shaking amplitude of the buffer inner frame 405. In addition, the plurality of spoilers 406 fixedly arranged in the inner bottom of the buffer inner frame 405 can effectively block the flow of the internal medicine liquid. When the medicine liquid tries to flow under the action of inertia, the spoilers 406 will change the flow direction of the medicine liquid, consume the kinetic energy of the medicine liquid, and inhibit the shaking of the medicine liquid. In this way, through the synergistic effect of the buffer inner frame 405, the spring damper 408 and the spoilers 406, the influence of the shaking of the medicine liquid on the flight stability of the unmanned aerial vehicle is maximally reduced, and the unmanned aerial vehicle can fly stably, providing a stable platform for pesticide spraying operation.

[0038] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A stable plant protection spraying drone, comprising a drone body (1), characterized in that: A plurality of first connecting members (7) are fixedly provided inside the drone body (1), a support arm (2) is fixedly provided inside each of the plurality of first connecting members (7), a second connecting member (8) is fixedly provided at one end of each of the plurality of support arms (2) away from each other, a flight motor (3) is fixedly provided at the upper end of each of the plurality of second connecting members (8), a propeller blade (9) is fixedly provided at the output end of each of the plurality of flight motors (3), and a heat dissipation mechanism (6) is provided on the outside of each of the plurality of flight motors (3); The lower end of the drone body (1) is fixedly provided with a storage mechanism (4), the upper end of the storage mechanism (4) is fixedly provided with a medicine pump, the output end of the medicine pump is connected to the inside of the heat dissipation mechanism (6), and the input end of the medicine pump is connected to the inside of the storage mechanism (4), the storage mechanism (4) comprises a protective outer frame (404), the upper end of the protective outer frame (404) is fixedly provided with an upper connecting frame (401), the upper end of the upper connecting frame (401) is fixedly connected to the drone body (1), two L-shaped steels (402) are fixedly provided inside the upper connecting frame (401), a buffer frame (407) is rotatably provided between the two L-shaped steels (402), a buffer inner frame (405) is rotatably provided inside the buffer frame (407), the top end of the buffer inner frame (405) is closed and passes through a pipeline connected to the input end of the medicine pump, and a plurality of spoilers (406) are fixedly provided on the bottom of the buffer inner frame (405); A spring damper (408) is provided at a ball hinge at the middle position of the lower end of the buffer inner frame (405), and a ball hinge is provided at the lower end of the spring damper (408) at the middle position of the inner bottom of the protective outer frame (404).

2. A stable plant protection spraying drone according to claim 1, characterized in that: A supplementary port (403) is provided through one side of the protective outer frame (404), and the supplementary port (403) is connected to the inside of the buffer inner frame (405) via a bellows.

3. The stable plant protection spraying drone according to claim 1, characterized in that: The heat dissipation mechanism (6) comprises a heat absorbing spiral frame (601), the heat absorbing spiral frame (601) is made of copper, and the heat absorbing spiral frame (601) is spirally wound and arranged outside the flight motor (3).

4. The stable plant protection spraying drone according to claim 3, characterized in that: A first transmission tube (602) is fixedly provided at one end of the heat-absorbing spiral frame (601), and the first transmission tube (602) is connected to the output end of the medicine pump. A second transmission tube (603) is fixedly provided at the other end of the heat-absorbing spiral frame (601), and a medicine spraying head (604) is fixedly provided at the other end of the second transmission tube (603), and the medicine spraying head (604) is fixedly provided at the lower end of the second connecting member (8).

5. The stable plant protection spraying drone according to claim 1, characterized in that: Two lower supporting feet (5) are fixedly provided at the lower end of the drone body (1).

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