Windproof propeller for unmanned aerial vehicle

Abstract

The windproof propeller for the unmanned aerial vehicle relates to the technical field of unmanned aerial vehicles and comprises a vehicle arm, a rotating shaft is arranged at one end of the top of the vehicle arm, three fixed propellers are arranged on the outer side of the top end of the rotating shaft in an annular array mode, and adjusting bolts are arranged in threaded grooves formed in the tops of the three fixed propellers. Sliding grooves are formed in the two sides of the inner walls of the three fixed paddles correspondingly, and telescopic paddles are arranged in the three fixed paddles correspondingly. According to the utility model, the adjusting bolt is detached and taken out from the original adjusting threaded hole, the limiting fixation between the telescopic paddle and the fixed paddle is relieved, and the flight controllability of the unmanned aerial vehicle can be improved after the paddle pitch between the telescopic paddle and the fixed paddle is adjusted, so that when the wind is strong, the paddle pitch is increased so as to increase the windward area and tension of the paddle blades; when the wind is small, the propeller pitch is reduced to improve the efficiency of the propeller, and the unmanned aerial vehicle can obtain the optimal flight performance under different wind conditions by accurately controlling the propeller pitch.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a windproof propeller for UAVs. Background Technology

[0002] The drone propeller is a crucial component of a drone's flight system, playing an indispensable role throughout its operation. Structurally, a drone propeller typically consists of two main parts: the blades and the hub. The blades are the part of the propeller that directly interacts with the air, and their shape, material, and size are carefully considered to achieve efficient aerodynamic performance. Generally, the blades have a specific airfoil design, which creates a pressure difference on the blade surface as the drone rotates, thereby generating upward or forward thrust.

[0003] However, in existing technologies, most drone propellers lack wind resistance. In windy conditions, especially crosswinds, the propellers experience uneven forces, which can lead to control failure. Furthermore, to overcome wind resistance, the motors need to output more power to drive the propellers, meaning that with the same battery capacity, the drone's flight time will be shorter. Therefore, we provide a windproof propeller for drones. Utility Model Content

[0004] The purpose of this invention is to provide a windproof propeller for unmanned aerial vehicles (UAVs) to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a windproof propeller for a drone, comprising an arm, a rotating shaft at one top end of the arm, three fixed propellers arranged in a circular array on the outer side of the top of the rotating shaft, adjusting bolts in threaded grooves at the top of each of the three fixed propellers, sliding grooves on both sides of the inner walls of each of the three fixed propellers, telescopic propellers inside each of the three fixed propellers, sliders on both sides of each of the three telescopic propellers near the fixed propellers, three adjusting threaded holes arranged in an array at the top of each of the three telescopic propellers near the fixed propellers, and air guide grooves at the top of each of the three telescopic propellers away from the fixed propellers. Fixed posts are provided on both sides of one end of the arm, and connecting frames are provided on one side of two of the fixed posts. The connecting frames are fixedly installed to the fixed posts by fixing bolts. Connecting posts are provided on the top side of the two connecting frames away from the fixed posts, and arc-shaped wind shields are provided on the top of the connecting posts.

[0006] As a further preferred embodiment of this technical solution, a rotating shaft is rotatably mounted on one end of the top of the arm, and three fixed propellers are fixedly connected in a ring array on the outer side of the top of the rotating shaft.

[0007] As a further preferred embodiment of this technical solution, the end of the telescopic paddle near the slider is connected to the fixed paddle, and sliders are fixedly connected to both sides of the end of the telescopic paddle near the fixed paddle.

[0008] As a further preferred embodiment of this technical solution, the outside of the slider is slidably connected to the inner wall of the groove, and the adjusting bolt passes through the threaded groove opened at the top of the fixed paddle and is threadedly connected to the inner wall of the adjusting threaded hole.

[0009] As a further preferred embodiment of this technical solution, fixed columns are fixedly connected to both sides of one end of the robotic arm.

[0010] As a further preferred embodiment of this technical solution, a connecting column is fixedly connected to the top side of the end of the connecting frame away from the fixed column.

[0011] As a further preferred embodiment of this technical solution, the tops of both connecting columns are fixedly connected to the bottom of the arc-shaped windbreak plate.

[0012] This utility model provides a windproof propeller for drones, which has the following beneficial effects:

[0013] (1) By removing the adjusting bolt from the original adjusting threaded hole, the limiting fixation between the telescopic propeller and the fixed propeller will be released. After adjusting the pitch between the telescopic propeller and the fixed propeller, the controllability of the UAV flight can be increased. In the case of strong wind, the pitch can be increased to increase the windward area and thrust of the propeller blades; in the case of weak wind, the pitch can be reduced to improve the efficiency of the propeller. By precisely controlling the pitch, the UAV can obtain the best flight performance under different wind conditions.

[0014] (2) The present invention allows air to flow in an orderly manner along the direction of the groove by opening the air guide groove at the end of the telescopic propeller, reducing the accumulation and turbulence of air at the end, thereby reducing air resistance and accelerating the air flow at the end of the propeller blade, thereby increasing the pressure difference between the upper and lower surfaces of the propeller blade, and thus increasing the lift generated by the propeller.

[0015] (3) The present invention installs an arc-shaped wind shield at one end of the arm. The arc-shaped wind shield can effectively block the direct impact of the crosswind on the propeller, guide the crosswind to both sides, reduce the uneven pressure of the wind on the propeller, and enable the propeller to operate more stably in the wind, thereby enhancing the stability of the UAV during flight. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a windproof propeller structure for a drone according to the present invention.

[0017] Figure 2 This is a structural schematic diagram of the side of a disassembled windproof propeller for a drone according to the present invention.

[0018] Figure 3 This is a structural diagram of the side view of the disassembled windproof propeller fixed propeller and telescopic propeller of a drone according to the present invention.

[0019] Figure 4 This is a structural schematic diagram of the disassembled side of a windproof propeller connecting frame and fixing column for a drone according to the present invention.

[0020] In the diagram: 11. Arm; 12. Shaft; 13. Fixed propeller; 14. Adjusting bolt; 15. Slide groove; 16. Telescopic propeller; 17. Adjusting threaded hole; 18. Sliding block; 19. Air guide duct; 110. Fixed column; 111. Connecting frame; 112. Fixed bolt; 113. Connecting column; 114. Curved wind shield. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model provides a technical solution: such as Figures 1-4 As shown, in this embodiment, a windproof propeller for a drone includes an arm 11. A rotating shaft 12 is rotatably mounted on one end of the top of the arm 11. Three fixed propellers 13 are fixedly connected in a ring array on the outer side of the top of the rotating shaft 12. Adjusting bolts 14 are provided in the threaded grooves on the top of each of the three fixed propellers 13. Sliding grooves 15 are provided on both sides of the inner wall of each of the three fixed propellers 13. Telescopic propellers 16 are provided inside each of the three fixed propellers 13. Slider blocks 18 are provided on both sides of each telescopic propeller 16 near the end of the fixed propeller 13. The end of the telescopic propeller 16 near the slider 18 is connected to the inside of the fixed propeller 13. Slider blocks 18 are fixedly connected to both sides of the telescopic propeller 16 near the end of the fixed propeller 13. The top of each of the three telescopic propellers 16 near the end of the fixed propeller 13 has an array of through-holes. There are three adjusting threaded holes 17. The outside of the slider 18 is slidably connected to the inner wall of the slide groove 15. The adjusting bolt 14 passes through the threaded groove opened on the top of the fixed paddle 13 and is threadedly connected to the inner wall of the adjusting threaded hole 17. The top of the three telescopic paddles 16 at the end away from the fixed paddle 13 is provided with air guide grooves 19. The two sides of one end of the arm 11 are fixedly connected to the fixed columns 110. The two fixed columns 110 are provided with the connecting frame 111 on one side. The connecting frame 111 and the fixed column 110 are fixedly installed by the fixing bolt 112. The top side of the end of the connecting frame 111 away from the fixed column 110 is fixedly connected to the connecting column 113. The top of the connecting column 113 is provided with the arc-shaped wind shield 114. The tops of the two connecting columns 113 are fixedly connected to the bottom of the arc-shaped wind shield 114.

[0023] In this embodiment, in strong winds, the unstable force on the propeller may cause the drone to malfunction. Therefore, to ensure the controllability of the drone's flight, the propeller pitch can be adjusted during the takeoff preparation phase. Specifically, the adjusting bolt 14 can be removed from the original adjusting threaded hole 17, releasing the limiting fixation between the telescopic propeller 16 and the fixed propeller 13. The pitch between the telescopic propeller 16 and the fixed propeller 13 can be changed using the slider 18 and the groove 15. After adjustment, the adjusting bolt 14 is threaded back into the new adjusting threaded hole 17, thus restoring the limiting fixation between the telescopic propeller 16 and the fixed propeller 13. In strong winds, the pitch is increased to increase the blade's frontal area and thrust; in weak winds, the pitch is decreased to improve propeller efficiency. By precisely controlling the pitch, the drone can achieve optimal flight performance under different wind conditions. The air guide slot 19 allows air to flow in an orderly manner along the direction of the slot, reducing air accumulation and turbulence at the end, thereby reducing air resistance and accelerating airflow at the blade tip, thus increasing the pressure difference between the upper and lower surfaces of the blade and increasing the lift generated by the propeller. In addition, in the event of crosswinds, the air guide slot 19 can guide the crosswinds to flow along the direction of the slot, reducing the direct impact of the crosswinds on the propellers. This allows the propellers to maintain better stability in crosswinds, reducing the attitude changes and flight deviations of the UAV caused by crosswinds. The curved wind shield 114 can be installed at one end of the arm 11 by fixing bolts 112. The curved wind shield 114 can effectively block the direct impact of the crosswinds on the propellers, guiding part of the crosswinds to both sides, reducing the uneven pressure of the wind on the propellers, and allowing the propellers to operate more stably in the wind, thereby enhancing the stability of the UAV during flight.

[0024] This utility model provides a windproof propeller for drones, and its working principle is as follows:

[0025] During the preparation phase for drone takeoff, the adjusting bolt 14 needs to be removed from the original adjusting threaded hole 17. This removes the restriction between the telescopic propeller 16 and the fixed propeller 13, allowing for free adjustment. After the telescopic propeller 16 and the fixed propeller 13 are released from their limiting positions, the pitch between them can be changed using the slider 18 and the groove 15. This design makes the pitch adjustment more flexible and precise, meeting different flight requirements. After adjusting to the appropriate pitch, the adjusting bolt 14 is used again to thread it into the new adjusting threaded hole 17. At this point, the telescopic propeller 16 and the fixed propeller 13 are once again restricted and fixed, ensuring the stability of the propeller during flight. Qualitatively, increasing the blade pitch is of great significance, as it increases the blade's frontal area and thrust. In addition, a guide slot 19 is provided at the end of the telescopic blade 16. The guide slot 19 can guide the air to flow in an orderly manner along the direction of the slot, reducing the accumulation and turbulence of air at the propeller end, thereby reducing air resistance. At the same time, the guide slot 19 can also accelerate the airflow at the blade end, making the propeller more efficient. Furthermore, an arc-shaped wind shield 114 is installed at one end of the arm 11. This arc-shaped wind shield 114 can effectively block the direct impact of crosswinds on the propeller. When encountering crosswinds, the wind shield can guide part of the crosswind to both sides, reducing the uneven pressure of the wind on the propeller.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A windproof propeller for a drone, comprising an arm (11), characterized in that: The top end of the arm (11) is provided with a rotating shaft (12). Three fixed propellers (13) are arranged in a circular array on the outer side of the top end of the rotating shaft (12). Adjusting bolts (14) are provided in the threaded grooves opened on the top of the three fixed propellers (13). Sliding grooves (15) are opened on both sides of the inner wall of the three fixed propellers (13). Telescopic propellers (16) are provided inside the three fixed propellers (13). Sliding blocks (18) are provided on both sides of the three telescopic propellers (16) near the end of the fixed propellers (13). The top of the three telescopic propellers (16) near the end of the fixed propellers (13) are arranged in a through array. There are three adjusting threaded holes (17). The top of the three telescopic paddles (16) away from the fixed paddle (13) is provided with air guide grooves (19). The two sides of one end of the arm (11) are provided with fixed columns (110). The two fixed columns (110) are provided with connecting frames (111) on one side. The connecting frames (111) and the fixed columns (110) are fixedly installed by fixing bolts (112). The top side of the two connecting frames (111) away from the fixed columns (110) is provided with connecting columns (113). The top of the connecting columns (113) is provided with arc-shaped wind shields (114).

2. A windproof propeller for a drone according to claim 1, characterized in that: The top end of the arm (11) is rotatably mounted with a rotating shaft (12), and three fixed propellers (13) are fixedly connected to the outer side of the top of the rotating shaft (12) in a ring array.

3. A windproof propeller for a drone according to claim 1, characterized in that: The telescopic paddle (16) is connected to the fixed paddle (13) at one end near the slider (18), and sliders (18) are fixedly connected to both sides of the telescopic paddle (16) near the fixed paddle (13).

4. A windproof propeller for a drone according to claim 1, characterized in that: The outside of the slider (18) is slidably connected to the inner wall of the groove (15), and the adjusting bolt (14) passes through the threaded groove opened on the top of the fixed paddle (13) and is threadedly connected to the inner wall of the adjusting threaded hole (17).

5. A windproof propeller for a drone according to claim 1, characterized in that: Both sides of one end of the arm (11) are fixedly connected to fixed columns (110).

6. A windproof propeller for a drone according to claim 1, characterized in that: The connecting frame (111) has a connecting column (113) fixedly connected to the top side of the end away from the fixed column (110).

7. A windproof propeller for a drone according to claim 1, characterized in that: The tops of the two connecting columns (113) are fixedly connected to the bottom of the arc-shaped windbreak plate (114).

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