Unmanned aerial vehicle rotor wing protection device and unmanned aerial vehicle

Abstract

The invention relates to an unmanned aerial vehicle rotor wing protection device and an unmanned aerial vehicle. The unmanned aerial vehicle rotor wing protection device comprises a protection cylinder and an air inlet adjusting assembly. The two ends of the protection cylinder are provided with communicating openings, the protection cylinder is used for being installed at a rotor wing of the unmanned aerial vehicle, and the rotor wing is located in the protection cylinder. An air inlet adjusting assembly is arranged at one end of the protection barrel, an air inlet channel is formed in the protection barrel, airflow in the protection barrel can enter the air inlet channel, the air inlet adjusting assembly communicates with the air inlet channel, and the air inlet adjusting assembly can stretch out and draw back under the action of air pressure so that the size of an opening in one end of the protection barrel can be adjusted. Airflow generated by the rotor wings is used as power to push the air inlet adjusting assembly to stretch out and draw back, then the size of an opening in one end of the protection barrel is adjusted, the lift force of all the rotor wings in the unmanned aerial vehicle can be adjusted, distribution of the lift force can be adjusted, the unmanned aerial vehicle obtains better flight stability, steering control is improved, and the unmanned aerial vehicle is more stable. And the unmanned aerial vehicle can conveniently fly under the condition of complex crosswind.

Description

Technical Field

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

[0002] Rotor drones have multiple rotors driven by motors that rotate at high speeds installed on their frames. The motors drive the rotors to rotate at high speeds, and the reaction force of high-speed airflow drives the drone to fly. Most of the existing drones have rotor protection covers to prevent the rotors from directly hitting obstacles during flight, thereby damaging the structural integrity of the rotors. Such protection devices have a single function and cannot improve the stability of drones in complex crosswind environments.

[0003] Invention or content

[0004] 1. Technical issues to be resolved

[0005] The present invention provides a UAV rotor protection device and a UAV, aiming to solve the problem in the prior art that the rotor protection device cannot improve the flight stability of the UAV in a complex crosswind environment.

[0006] (II) Technical solution

[0007] In order to solve the above problems, the present invention provides a UAV rotor protection device, which includes a protection tube and an air inlet adjustment component;

[0008] Both ends of the protective tube are provided with communicating openings, and the protective tube is used to be installed on the rotor of the UAV, and the rotor is located inside the protective tube;

[0009] The air inlet regulating component is provided at one end of the protective tube, and an air inlet duct is provided on the protective tube. The airflow in the protective tube can enter the air inlet duct, and the air inlet regulating component is connected to the air inlet duct. The air inlet regulating component can be expanded and contracted under the action of air pressure to adjust the size of the opening at one end of the protective tube.

[0010] Preferably, the air inlet adjustment assembly includes a plurality of flexible air bags.

[0011] The circumferential array of the flexible airbags is arranged on the inner wall of the protective tube, and the inner wall of the protective tube has air inlets and pressure relief ports that are connected one by one with the flexible airbags, and the air inlets are connected with the air inlet duct;

[0012] The airflow in the air inlet duct can enter the flexible airbag through the air inlet, thereby causing the flexible airbag to expand.

[0013] Preferably, the air inlet adjustment assembly further includes a telescopic rod and an elastic reset member;

[0014] The flexible airbag is provided with the telescopic rod, the first end of the telescopic rod is fixedly provided on the protective tube, and the second end of the telescopic rod is fixedly connected to the flexible airbag;

[0015] The elastic reset member is sleeved on the telescopic rod, one end of the elastic reset member is fixedly connected to the protective tube, and the other end of the elastic reset member is fixedly connected to the second end of the telescopic rod.

[0016] Preferably, the air inlet adjustment assembly further includes a guide shaft, an elastic reset member and a slider;

[0017] The guide shaft is arranged in each of the flexible airbags, the first end of the guide shaft is fixedly arranged on the protective tube, the slider is slidably mounted on the guide shaft, and the slider is connected to the flexible airbag;

[0018] The elastic reset member is sleeved on the guide shaft, one end of the elastic reset member is fixedly connected to the protection tube, and the other end of the elastic reset member is fixedly connected to the sliding block.

[0019] Preferably, the elastic return member is a spring or an elastic sleeve.

[0020] Preferably, a ventilation plate is further provided in the protection tube, and a plurality of ventilation holes are penetrated through the ventilation plate.

[0021] Preferably, a ventilation duct is provided in the ventilation plate, the ventilation duct is connected with the air inlet duct, and an air inlet connected with the ventilation duct is provided on a side of the ventilation plate facing the flexible airbag.

[0022] Preferably, a pressure relief valve is provided at the pressure relief port, and a one-way valve is provided at the air inlet, so that the airflow in the air inlet duct can enter the flexible airbag through the one-way valve.

[0023] Preferably, the present invention further provides a drone, wherein a plurality of arms are provided on the drone, and one end of each of the arms is provided with the drone rotor protection device as described above;

[0024] A rotor and the protective tube are provided at one end of the support arm, and the rotor is located inside the protective tube.

[0025] (III) Beneficial effects

[0026] The present invention arranges an air intake adjustment component in the protective tube. When the UAV is working, the airflow generated by the rotor is used as power to push the air intake adjustment component to expand and contract, thereby adjusting the size of the opening at one end of the protective tube. By adjusting the size of the air intake above the UAV rotor, the size of the lift at each rotor in the UAV can be adjusted, and the distribution of the lift can be adjusted, so that the UAV can obtain better flight stability, improve steering control, and facilitate the UAV to fly in complex crosswind conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the UAV rotor protection device of the present invention;

[0028] Figure 2 A cross-sectional view of the UAV rotor protection device of the present invention;

[0029] Figure 3 The figure is a schematic diagram of assembling the UAV rotor protection device of the present invention on a UAV.

[0030] [Description of Reference Numerals]

[0031] 1: protection tube; 11: air inlet; 12: air inlet; 13: pressure relief port;

[0032] 2: air inlet adjustment component; 21: flexible airbag; 22: guide shaft; 23: elastic reset member; 24: slider;

[0033] 3: ventilation plate; 31: ventilation hole;

[0034] 4: UAV; 41: support arm; 42: rotor. DETAILED DESCRIPTION

[0035] In order to better explain the present invention or, to facilitate understanding, the present invention or is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0036] It should be noted that all directional indications in the present invention or embodiments (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, the descriptions of "first", "second", etc. in the present invention or in the specification are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention or in the specification, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention or in the text, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention or in the text can be understood according to specific circumstances.

[0039] The present invention provides a drone rotor protection device, which includes a protection tube 1 and an air inlet adjustment component 2. Both ends of the protection tube 1 are provided with interconnected openings, and the protection tube 1 is used to be installed at the rotor of the drone, and the rotor is located in the protection tube 1. One end of the protection tube 1 is provided with an air inlet adjustment component 2, and the protection tube 1 is provided with an air inlet duct 11, and the airflow in the protection tube 1 can enter the air inlet duct 11. The air inlet adjustment component 2 is connected to the air inlet duct 11, and the air inlet adjustment component 2 can be extended and retracted under the action of air pressure to adjust the size of the opening at one end of the protection tube 1.

[0040] The present invention arranges an air inlet adjustment component 2 in the protective tube 1. When the UAV is working, the airflow generated by the rotor is used to introduce part of the airflow into the air inlet adjustment component 2 through the air inlet duct 11, and the airflow is used as a power to push the air inlet adjustment component 2 to expand and contract, thereby adjusting the size of the opening at one end of the protective tube 1. When the size of the air inlet above the UAV rotor is adjustable, the size of the lift at each rotor of the UAV can be adjusted, and the distribution of the lift can be adjusted, so that the UAV can obtain better flight stability, improve steering control, and facilitate the UAV to fly in complex crosswind conditions.

[0041] Furthermore, the air inlet adjustment component 2 includes a plurality of flexible airbags 21. The flexible airbags 21 are arranged in a circumferential array on the inner wall of the protective tube 1, and the air inlet 12 and the pressure relief port 13 on the inner wall of the protective tube 1 are connected one by one with the flexible airbags 21, and the air inlet 12 is connected with the air inlet duct 11. The airflow in the air inlet duct 11 can enter the flexible airbag 21 through the air inlet 12, thereby causing the flexible airbag 21 to expand.

[0042] In the above scheme, the airflow generated by the rotor is used to push the flexible airbag 21 to expand. When the flexible airbags 21 on the inner wall of the protective tube 1 are all expanded, the opening at one end of the protective tube 1 becomes smaller; conversely, if the pressure relief port 13 is opened, the pressure in the flexible airbag 21 is reduced, and the flexible airbag 21 will shrink, thereby making the opening at one end of the protective tube 1 larger. The present invention uses the airflow generated by the rotor to drive the flexible airbag 21. The power source is simple. It will be generated when the drone is flying. There is no need to add an additional power source to drive it, which reduces the counterweight and will not affect the normal flight of the drone.

[0043] In one embodiment (not shown), the air inlet adjustment assembly 2 also includes a telescopic rod and an elastic reset member 23. The flexible airbag 21 is provided with a telescopic rod, the first end of the telescopic rod is fixedly arranged on the protective tube 1, and the second end of the telescopic rod is fixedly connected to the flexible airbag 21. The telescopic rod is sleeved with an elastic reset member 23, one end of the elastic reset member 23 is fixedly connected to the protective tube 1, and the other end of the elastic reset member 23 is fixedly connected to the second end of the telescopic rod. When the flexible airbag 21 expands, the flexible airbag 21 can drive the telescopic rod to extend, that is, the second end of the telescopic rod is away from the first end, and the elastic reset member 23 is stretched at this time; when the pressure relief port 13 is depressurized, the telescopic rod shrinks under the action of the elastic reset member 23, and the flexible airbag 21 also shrinks at this time. The telescopic rod and the elastic reset member 23 are provided to guide the movement direction of the flexible airbag 21. In a more preferred embodiment, the telescopic direction of the telescopic rod is the radial direction of the protective tube 1. Specifically, the telescopic rod is two rods sleeved together and can slide relative to each other, and the telescopic rod is arranged along the radial direction of the protective tube 1.

[0044] In another embodiment (such as Figure 2 As shown, this embodiment is different from the previous embodiment mainly in that the telescopic rod is changed into a guide shaft, and a slider is added to the guide shaft). The air inlet adjustment assembly 2 also includes a guide shaft 22, an elastic reset member 23 and a slider 24. A guide shaft 22 is provided in the flexible airbag 21. The first end of the guide shaft 22 is fixedly provided on the protective tube 1. The slider 24 is slidably installed on the guide shaft 22, and the slider 24 is connected to the flexible airbag 21. The elastic reset member 23 is sleeved on the guide shaft 22. One end of the elastic reset member 23 is fixedly connected to the protective tube 1, and the other end of the elastic reset member 23 is fixedly connected to the slider 24. The length direction of the guide shaft 22 is consistent with the radial direction of the protective tube 1. A through hole is penetrated on the slider 24. The slider 24 is sleeved on the guide shaft 22 through the through hole. The slider 24 can move along the length direction of the guide shaft 22, and there is a sealing material between the slider 24 and the guide shaft 22. In this solution: when the flexible airbag 21 needs to expand, the flexible airbag 21 expands in the radial direction of the protective tube 1 under the guidance of the slider 24, and the elastic reset member 23 is stretched; when the flexible airbag 21 needs to shrink, the slider 24 slides toward the inner wall of the protective tube 1 under the action of the elastic reset member 23, and the flexible airbag 21 shrinks at this time, and the guide shaft 22 extends out of the flexible airbag 21.

[0045] In the above two solutions, the elastic reset member 23 is a spring or an elastic sleeve. By adopting mature parts, reliability is improved.

[0046] Furthermore, a ventilation plate 3 is provided in the protection tube 1, and a plurality of ventilation holes 31 are provided through the ventilation plate 3. In the UAV, the ventilation plate 3 is located between the rotor and the flexible airbag 21, and the ventilation plate 3 can ensure that the flexible airbag 21 will not be sucked onto the rotor due to excessive airflow, thereby ensuring the normal operation of the rotor.

[0047] In addition, a ventilation duct is provided in the ventilation plate 3, and the ventilation duct is connected to the air inlet duct 11. An air inlet connected to the ventilation duct is provided on the side of the ventilation plate 3 facing the flexible airbag 21. When the drone takes off, part of the airflow generated by the rotor enters the air inlet duct 11 in the protective tube 1 through the air inlet and ventilation duct on the ventilation plate 3, thereby providing power for the expansion of the flexible airbag 21.

[0048] In a preferred embodiment, a pressure relief valve is provided at the pressure relief port 13 , and a one-way valve is provided at the air inlet 12 , so that the airflow in the air inlet 11 can enter the flexible airbag 21 through the one-way valve.

[0049] Finally, the present invention also provides a drone 4, which is provided with a plurality of arms 41, and one end of each arm 41 is provided with the above-mentioned drone rotor protection device. A rotor 42 and a protection tube 1 are provided at one end of the arm 41, and the rotor 42 is located in the protection tube 1.

[0050] It should be understood that the above description of the specific embodiments of the present invention or the invention is only for the purpose of illustrating the technical route and characteristics of the present invention or the invention, and its purpose is to enable those skilled in the art to understand the content of the present invention or the invention and implement it accordingly, but the present invention or the invention is not limited to the above specific implementation methods. All changes or modifications made within the scope of the present invention or the claims should be included in the protection scope of the present invention or the invention.

Claims

1. A drone rotor protection device, characterized in that: The unmanned aerial vehicle rotor protection device comprises a protection tube (1) and an air inlet adjustment component (2); Both ends of the protective tube (1) are provided with communicating openings, and the protective tube (1) is used to be installed on the rotor of the drone, and the rotor is located inside the protective tube (1); The air inlet adjustment component (2) is arranged at one end of the protective tube (1), an air inlet duct (11) is arranged on the protective tube (1), the air flow in the protective tube (1) can enter the air inlet duct (11), the air inlet adjustment component (2) is connected to the air inlet duct (11), and the air inlet adjustment component (2) can be extended and retracted under the action of air pressure to adjust the size of the opening at one end of the protective tube (1).

2. The UAV rotor protection device according to claim 1, characterized in that: The air inlet adjustment component (2) comprises a plurality of flexible air bags (21). The flexible airbags (21) are arranged in a circular array on the inner wall of the protective tube (1), and the inner wall of the protective tube (1) has air inlets (12) and pressure relief ports (13) which are connected one by one with the flexible airbags (21), and the air inlets (12) are connected with the air inlet duct (11); The airflow in the air inlet duct (11) can enter the flexible airbag (21) through the air inlet port (12), thereby causing the flexible airbag (21) to expand.

3. The UAV rotor protection device according to claim 2, characterized in that: The air inlet adjustment assembly (2) also includes a telescopic rod and an elastic reset member (23); The flexible airbag (21) is provided with the telescopic rod, the first end of the telescopic rod is fixedly arranged on the protective tube (1), and the second end of the telescopic rod is fixedly connected to the flexible airbag (21); The telescopic rod is sleeved with the elastic reset member (23), one end of the elastic reset member (23) is fixedly connected to the protective tube (1), and the other end of the elastic reset member (23) is fixedly connected to the second end of the telescopic rod.

4. The UAV rotor protection device according to claim 2, characterized in that: The air inlet adjustment assembly (2) further comprises a guide shaft (22), an elastic reset member (23) and a sliding block (24); The guide shaft (22) is arranged in each of the flexible airbags (21), the first end of the guide shaft (22) is fixedly arranged on the protective tube (1), the slider (24) is slidably mounted on the guide shaft (22), and the slider (24) is connected to the flexible airbag (21); The elastic reset member (23) is sleeved on the guide shaft (22), one end of the elastic reset member (23) is fixedly connected to the protection tube (1), and the other end of the elastic reset member (23) is fixedly connected to the sliding block (24).

5. The UAV rotor protection device according to claim 3 or 4, characterized in that: The elastic reset member (23) is a spring or an elastic sleeve.

6. The UAV rotor protection device according to any one of claims 2 to 4, characterized in that: A ventilation plate (3) is also provided in the protection tube (1), and a plurality of ventilation holes (31) are provided through the ventilation plate (3).

7. The UAV rotor protection device according to claim 6, characterized in that: A ventilation duct is arranged inside the ventilation plate (3), and the ventilation duct is connected to the air inlet duct (11). An air inlet connected to the ventilation duct is arranged on one side of the ventilation plate (3) facing the flexible airbag (21).

8. The UAV rotor protection device according to any one of claims 2 to 4, characterized in that: The pressure relief port (13) is provided with a pressure relief valve, and the air inlet (12) is provided with a one-way valve, so that the airflow in the air inlet duct (11) can enter the flexible airbag (21) through the one-way valve.

9. A drone, characterized in that: The drone (4) is provided with a plurality of supporting arms (41), and one end of each supporting arm (41) is provided with a drone rotor protection device according to any one of claims 1 to 8; A rotor (42) and the protective tube (1) are provided at one end of the support arm (41), and the rotor (42) is located inside the protective tube (1).

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