Flow guide structure for unmanned aerial vehicle

Abstract

The flow guide structure comprises a base used for being connected with the unmanned aerial vehicle, at least four umbrella ribs are hinged to the base, each umbrella rib rotates around a hinge shaft in the vertical direction through a driving unit, and wind shielding cloth is arranged among the umbrella ribs. Synchronous opening and closing of the four umbrella ribs are achieved through the driving unit, so that the purpose of adjusting the angle of the flow guide plate, namely the wind shielding cloth, is achieved, and the flow guide requirements in different flight scenes are met; the driving unit adjusts the inclination angle of the umbrella ribs according to the flight state, a customized flow guide curved surface is formed, the airflow direction is effectively guided, for example, the curved surface is unfolded to be in a downward concave shape to accelerate airflow downward washing during hovering and adjusted to be in a forward inclined shape to reduce wind resistance during forward flight, and the dynamic response efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of fluid dynamics, specifically a flow guiding structure for unmanned aerial vehicles (UAVs). Background Technology

[0002] During flight, airflow interference can cause additional drag, increased noise, and decreased equipment stability in drones. Airflow guidance structures, by optimizing the airflow path, can significantly improve aerodynamic efficiency, extend flight time, and protect critical components such as propellers and sensors.

[0003] For example, Chinese utility model patent CN222247716U, with an authorization announcement date of December 27, 2024, discloses a fire-fighting drone with a flow deflector, which includes a body. The outer wall of the body is uniformly provided with a frame. A propeller is installed on the upper side of the frame. A flow deflector is installed on the top of the body. Insert plates are symmetrically arranged on the left and right sides of the bottom of the flow deflector. A slot is opened on the top of the body corresponding to the insert plate. Through holes are opened on the left and right sides of the body. Insert rods are arranged inside the through holes. Springs are sleeved on the outer wall of the insert rods. An outer pull pad is provided at the outer end of the insert rods.

[0004] The aforementioned prior art employs a fixed fairing, which is integrally molded and has a simple structure. However, it cannot adjust the airflow effect according to flight conditions (such as high-speed cruise / low-speed hovering). Its fixed shape is difficult to adapt to the needs of multi-mission scenarios and leads to increased energy consumption.

[0005] Therefore, how to effectively solve the problem that the drone fairing cannot adjust its airflow effect according to the flight status, making it difficult to adapt to the needs of multi-mission scenarios and leading to increased energy consumption is an urgent technical problem to be solved. Utility Model Content

[0006] To address the shortcomings of the aforementioned background technology, this utility model proposes a flow guiding structure for unmanned aerial vehicles (UAVs), which solves the problems that the UAV fairing cannot adjust the flow guiding effect according to the flight status, making it difficult to adapt to the needs of multi-mission scenarios and leading to increased energy consumption.

[0007] The technical solution of this application is as follows:

[0008] A flow guidance structure for unmanned aerial vehicles (UAVs) includes a base for connection to the UAV. At least four ribs are hinged to the base, each rib rotating vertically about a hinge axis via a drive unit. A windproof cloth is disposed between the ribs. This invention achieves synchronous opening and closing of the four ribs through the drive unit, thereby adjusting the angle of the flow guide (windproof cloth) to meet the flow guidance requirements in different flight scenarios. The drive unit adjusts the tilt angle of the ribs according to the flight state, forming a customized flow guidance surface that effectively guides the airflow direction. For example, when hovering, it unfolds into a concave shape to accelerate the downwash of airflow, and when flying forward, it adjusts to a forward-tilted shape to reduce wind resistance, thus improving dynamic response efficiency.

[0009] Furthermore, the drive unit includes a rotating assembly connected to a motor, and the rotating assembly is connected to a telescopic assembly for rotating the umbrella ribs.

[0010] Furthermore, the drive unit includes a main bevel gear, which meshes with at least four secondary bevel gears. The telescopic assembly includes a sleeve coaxial with and fixedly connected to the secondary bevel gears. The sleeve has a spiral groove on its circumferential surface. The sleeve and the secondary bevel gears have slidingly engaged rods one and two. The circumferential surface of rod two has a rod three that slides along the groove. The cantilever end of rod two is hinged to the umbrella rib.

[0011] Furthermore, the inner wall of rod one is fitted with the outer wall of rod two, and the circumferential surface of rod one is provided with a clearance elongated hole for rod three to slide.

[0012] Furthermore, the center holes of the main bevel gear and the secondary bevel gear are both bearing holes. A support rod one is rotatably connected inside the bearing hole of the main bevel gear, and a support rod two is rotatably connected inside the bearing hole of the secondary bevel gear. One end of the support rod two is fixedly connected to the support rod one, and the other end is rotatably connected to the rod one.

[0013] Furthermore, the second rod is hinged to the umbrella rib via the first hinge, and the umbrella rib is hinged to the base via the second hinge.

[0014] Furthermore, the umbrella rib is provided with a clearance groove, the first hinge includes a U-shaped plate with a bearing hole, the second rod passes through the bearing hole and rests on the side of the umbrella rib, and the first screw passes through the wing plate of the U-shaped plate and the clearance groove and is positioned by a nut.

[0015] Furthermore, the second hinge includes a perforated ear plate disposed on the lower surface of the base, the end of the umbrella rib is provided with a hole, and the second screw passes through the perforated ear plate and the hole and is positioned by the second nut.

[0016] Furthermore, the opening angle of each umbrella rib is 30°-75°.

[0017] Furthermore, the windproof cloth is made of elastic material. When the opening angle of the four umbrella ribs is larger, the distance between the umbrella ribs is greater, and the windproof cloth can be stretched to a certain extent.

[0018] The specific beneficial effects of this utility model include:

[0019] The motor drives the main bevel gear to rotate, which ingeniously drives four meshing secondary bevel gears to rotate in tandem. As the secondary bevel gears rotate, the telescopic components connected to them extend and retract, thus achieving the synchronous opening and closing of the four parachute ribs. This allows for the adjustment of the angle of the deflector, i.e., the windproof cloth, to meet the airflow guidance requirements in different flight scenarios. The drive unit adjusts the tilt angle of the parachute ribs according to the flight status, forming a customized airflow guiding surface that effectively guides the airflow direction. For example, when hovering, it unfolds into a concave shape to accelerate the downwash of the airflow, and when flying forward, it adjusts to a forward-tilted shape to reduce wind resistance, thereby improving dynamic response efficiency. Attached Figure Description

[0020] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0022] Figure 2 This is a schematic diagram of the base, umbrella ribs, and drive unit in this utility model;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This diagram illustrates the assembly relationship between the main bevel gear, the secondary bevel gear, and the telescopic assembly in this utility model. Figure 1 ;

[0025] Figure 5 This diagram illustrates the assembly relationship between the main bevel gear, the secondary bevel gear, and the telescopic assembly in this utility model. Figure 2 ;

[0026] Figure 6 This is a schematic diagram showing the assembly relationship between the secondary bevel gear and the telescopic assembly in this utility model;

[0027] Figure 7 This is a schematic diagram of the telescopic component in this utility model;

[0028] Figure 8 This is a schematic diagram of the telescopic component and the umbrella ribs in this utility model.

[0029] Explanation of icon numbers:

[0030] 1. Base; 2. Umbrella ribs;

[0031] 3. Drive unit; 4. Windshield cloth;

[0032] 21. Leaving slot;

[0033] 31. Main bevel gear; 32. Secondary bevel gear;

[0034] 33. Sleeve; 34. Channel;

[0035] 35. Pole 1; 36. Pole 2; 37. Pole 3;

[0036] 38. Make way for the elongated hole;

[0037] 41. U-shaped plate; 42. Perforated lug plate;

[0038] 43. Screw 1; 44. Screw 2;

[0039] 311. Support rod one; 312. Support rod two. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] A flow guidance structure for drones, such as Figures 1-3 As shown, the device includes a base 1 for connecting to a drone. The base 1 is hinged with at least four parachute ribs 2, each of which rotates vertically around a hinge axis via a drive unit 3. A windbreak cloth 4 is disposed between the parachute ribs 2. This invention achieves synchronous opening and closing of the four parachute ribs 2 through the drive unit 3, thereby adjusting the angle of the windbreak cloth 4 to meet the airflow guidance requirements in different flight scenarios. The drive unit 3 adjusts the tilt angle of the parachute ribs 2 according to the flight state, forming a customized airflow guiding surface that effectively guides the airflow direction. For example, when hovering, it unfolds into a concave shape to accelerate the downwash of airflow, and when flying forward, it adjusts to a forward-tilted shape to reduce wind resistance, thus improving dynamic response efficiency.

[0042] Based on the above embodiments, as a preferred embodiment, the drive unit 3 includes a rotating component connected to a motor, the rotating component being connected to a telescopic component for rotating the umbrella rib 2, the drive unit 3 including a main bevel gear 31 connected to a motor, the motor being fixedly connected to the main bevel gear 31, the motor driving the main bevel gear 31 to rotate, the main bevel gear 31 being meshed with at least four secondary bevel gears 32, the secondary bevel gears 32 being connected to a telescopic component for rotating the umbrella rib 2 in the vertical direction.

[0043] Specifically, the motor is connected to the base 1 below, and the main bevel gear 31 is connected to the motor below.

[0044] Specifically, the motor drives the main bevel gear 31 to rotate, and the main bevel gear 31 cleverly drives the four meshing secondary bevel gears 32 to rotate in coordination. As the secondary bevel gears 32 rotate, the telescopic components connected to them will then extend and retract, thus realizing the synchronous opening and closing of the four parachute ribs 2, thereby achieving the purpose of adjusting the angle of the deflector, i.e. the windproof cloth 4, to meet the deflection requirements under different flight scenarios.

[0045] Specifically, after repeated testing and optimization, the opening angle of each umbrella rib 2 is 30°-75°. Preferably, the windproof cloth 3 is made of elastic material. When the opening angle of the four umbrella ribs 2 is larger, the distance between the umbrella ribs 2 is greater, and the windproof cloth 3 needs to be stretched to a certain extent.

[0046] Based on the above embodiments, as a preferred embodiment, such as... Figures 4-8 As shown, the telescopic assembly includes a sleeve 33 coaxially and fixedly connected to the secondary bevel gear 32. The sleeve 33 is fixedly connected to the end face of the secondary bevel gear 32. The circumferential surface of the sleeve 33 is provided with a spiral groove 34. A first rod 35 and a second rod 36 are slidably fitted inside the sleeve 33 and the secondary bevel gear 32. The second rod 36 is fitted inside the first rod 35. A third rod 37 is provided on the circumferential surface of the second rod 36, sliding along the groove 34. When the secondary bevel gear 32 rotates, it drives the sleeve 33 to rotate, and the third rod 37 slides along the spiral groove 34. As rod 37 moves, rod 36 and rod 35 extend and retract. Rod 35 rotates with rod 36. The distance between rod 36 and rod 35 increases or decreases. When the distance between rod 36 and rod 35 increases, the cantilever end of rod 36 presses against the side of umbrella rib 2, lifting umbrella rib 2 and causing it to rotate upwards, thus unfolding the four umbrella ribs. When the distance between rod 36 and rod 35 decreases, the cantilever end of rod 36 retracts until it no longer contacts the side of umbrella rib 2, causing umbrella rib 2 to rotate and the four umbrella ribs to close.

[0047] Based on the above embodiments, as a preferred embodiment, such as... Figure 7As shown, the inner wall of rod 35 fits against the outer wall of rod 36, and the circumferential surface of rod 35 is provided with a clearance elongated hole 38 for rod 37 to slide, to prevent rod 36 from separating from rod 35.

[0048] Based on the above embodiments, as a preferred embodiment, the center holes of the main bevel gear 31 and the secondary bevel gear 32 are both bearing holes. A support rod 311 is rotatably connected inside the bearing hole of the main bevel gear 31. When the main bevel gear 31 rotates, the support rod 311 does not rotate. A support rod 312 is rotatably connected inside the bearing hole of the secondary bevel gear 32. When the secondary bevel gear 32 rotates, the support rod 312 does not rotate. One end of the support rod 312 is fixedly connected to the support rod 311, and the other end is rotatably connected to the rod 35.

[0049] Based on the above embodiments, as a preferred embodiment, the second rod 36 is hinged to the umbrella rib 2 via a first hinge, and the umbrella rib 2 is hinged to the base 1 via a second hinge, as follows. Figure 8 As shown, the umbrella rib 2 is provided with a relief groove 21, the first hinge includes a U-shaped plate 41 with a bearing hole, the second rod 36 passes through the bearing hole and rests on the side of the umbrella rib 2, and the first screw 43 passes through the wing plate of the U-shaped plate 41 and the relief groove 21 and is positioned by a nut.

[0050] Specifically, such as Figure 8 As shown, the second hinge includes a perforated ear plate 42 disposed on the lower surface of the base 1, and the end of the umbrella rib 2 is provided with a hole. The second screw 44 passes through the perforated ear plate 42 and the hole and is positioned by the second nut.

[0051] In this invention, the motor drives the main bevel gear 31 to rotate, which ingeniously drives four meshing secondary bevel gears 32 to rotate in tandem. As the secondary bevel gears 32 rotate, the telescopic components connected to them extend and retract, thereby achieving the synchronous opening and closing of the four parachute ribs 2. This allows for the adjustment of the angle of the deflector, i.e., the windproof cloth, to meet the airflow guidance requirements in different flight scenarios. The drive unit adjusts the tilt angle of the parachute ribs 2 according to the flight state, forming a customized airflow guiding surface that effectively guides the airflow direction. For example, when hovering, it unfolds into a concave shape to accelerate the downwash of the airflow, and when flying forward, it is adjusted to a forward tilt shape to reduce wind resistance, thus improving dynamic response efficiency.

[0052] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0053] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flow guiding structure for a drone, characterized by: The utility model provides a kind of unmanned aerial vehicle, including the base (1) for being connected with unmanned aerial vehicle, the base (1) is hinged at least four ribs (2), each rib (2) is rotated around hinged shaft in vertical direction by drive unit (3), windbreak cloth (4) is arranged between the rib (2).

2. The flow guiding structure for a UAV according to claim 1, wherein: The drive unit (3) includes a rotating assembly connected to a motor, and the rotating assembly is connected to a telescopic assembly for rotating the rib (2).

3. The flow guiding structure for a UAV according to claim 2, wherein: The rotating assembly includes a main bevel gear (31), which is engaged with at least four secondary bevel gears (32), respectively.

4. The flow guiding structure for a UAV according to claim 3, wherein: The telescopic assembly includes a sleeve (33) coaxially connected and fixedly connected with the secondary bevel gear (32), the peripheral surface of the sleeve (33) is provided with a spiral channel (34), and the sleeve (33) and the secondary bevel gear (32) are provided with a sliding fit rod one (35) and a rod two (36) inside.

5. The flow guiding structure for a UAV according to claim 4, wherein: The inner wall of the rod one (35) is attached to the outer wall of the rod two (36), and the peripheral surface of the rod one (35) is provided with a long hole (38) for sliding the rod three (37).

6. The flow guiding structure for a UAV according to claim 5, wherein: The central hole of the main bevel gear (31) and the secondary bevel gear (32) is a bearing hole, a support rod one (311) is rotatably connected in the bearing hole of the main bevel gear (31), a support rod two (312) is rotatably connected in the bearing hole of the secondary bevel gear (32), one end of the support rod two (312) is fixedly connected with the support rod one (311), and the other end is rotatably connected with the rod one (35).

7. The flow guiding structure for a UAV according to claim 6, wherein: The rod two (36) is hinged with the rib (2) through a hinge one, and the rib (2) is hinged with the base (1) through a hinge two.

8. The flow guiding structure for a UAV according to claim 7, wherein: The rib (2) is provided with a clearance slot (21), the hinge one includes a U-shaped plate (41) provided with a bearing hole, the rod two (36) is positioned on the side surface of the rib (2) through the bearing hole, a screw rod one (43) is threaded in the wing plate of the U-shaped plate (41) and the clearance slot (21) and positioned by a nut.

9. The flow guiding structure for a drone according to any one of claims 1-8, characterized in that: The hinge two includes a hole ear plate (42) provided on the lower surface of the base (1), and the end of the rib (2) is provided with a hole, a screw rod two (44) is threaded in the hole ear plate (42) and the hole and positioned by a nut two.

10. The flow guiding structure for a drone according to any one of claims 1-8, characterized in that: The opening and closing angle of each rib (2) is 30°-75°. The windbreak cloth (4) is made of elastic material.

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