Unmanned aerial vehicle propeller and unmanned aerial vehicle

Abstract

According to the unmanned aerial vehicle propeller and the unmanned aerial vehicle, a flow guide piece of the unmanned aerial vehicle propeller protrudes out of the surface of a propeller blade, so that airflow passes through the surface of the propeller blade more smoothly, turbulent flow and vortex are reduced, energy loss is reduced, the stress area of the propeller blade is increased to a certain degree, and the service life of the unmanned aerial vehicle propeller is prolonged. According to the propeller, turbulence and energy loss are reduced, the effective area of the propeller can be enlarged, thrust is enhanced, and the propeller is particularly remarkable in the scene needing larger lift force.

Description

Technical Field

[0001] This application relates to the field of flight equipment technology, specifically to a drone propeller and a drone. Background Technology

[0002] A drone propeller is a device used to propel a drone in flight. It typically consists of a rotating blade and a motor mounted on a support. The blade is driven to rotate by the motor, generating thrust that propels the drone forward. Drone propellers are usually made of high-strength, lightweight materials, such as carbon fiber composites, to withstand the tensile and impact forces during flight. Their design is also specially considered to improve efficiency and stability, employing techniques such as bending structures and biomimetic designs.

[0003] The performance requirements of drone propellers vary under different altitudes, speeds, and load conditions. How to make the propellers make full use of airflow in different flight states, and how to minimize energy loss in some flight states where airflow cannot be fully utilized, is a problem that has long been of concern to those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a drone propeller that reduces airflow energy loss to enhance propeller thrust. Another purpose of this application is to provide a drone including the aforementioned drone propeller.

[0005] In a first aspect, this application provides a drone propeller, comprising:

[0006] The connector is equipped with a power connection part;

[0007] At least two propeller blades, each of the propeller blades being connected circumferentially to the connecting seat;

[0008] At least two guide elements are connected to the surface of at least one of the propeller blades, and the guide elements at least partially protrude from the surface of the propeller blades; each of the guide elements is arranged at intervals along a first direction, the guide elements extend along a second direction, the first direction and the second direction are at an angle, the first direction is the length direction of the propeller blade, and the guide elements extend to the side edge of the propeller blade.

[0009] In this embodiment, the guide protrudes from the surface of the propeller blade, making the airflow smoother over the surface of the propeller blade, reducing the generation of turbulence and eddies, thereby reducing energy loss. It also increases the force-bearing area of ​​the propeller blade to a certain extent, reducing turbulence and energy loss, and can expand the effective area of ​​the propeller to enhance thrust, which is particularly significant in scenarios requiring greater lift.

[0010] In one example, the guide includes a first end and a second end arranged along the second direction, the first end being located on the side of the second end away from the side edge of the propeller blade, the structure of the guide exposed outside the propeller blade is streamlined, and the height of the guide exposed outside the propeller blade gradually increases from the first end to the second end.

[0011] In one example, the guide includes a first bending plate and a second bending plate, the first bending plate and the second bending plate are set at a certain angle, the second bending plate is fixedly connected to the propeller blade, at least a portion of the first bending plate is exposed outside the propeller blade, and the width of the first bending plate and / or the second bending plate gradually increases from the first end to the second end.

[0012] In one example, the guide further includes a connecting post extending along the second direction, wherein the first bending plate and the second bending plate are respectively connected to both sides of the connecting post.

[0013] In one example, the propeller blade is provided with a mounting groove, and both the connecting post and the second bending plate are partially located inside the mounting groove, with the ends of the connecting post and the second bending plate extending out of the mounting groove near the side edge.

[0014] In one example, a detachable component is also included, through which the flow guide is mounted to the propeller blade.

[0015] In one example, the propeller blade has a mounting groove that corresponds one-to-one with the flow guide. The flow guide is partially fitted and fixed inside the mounting groove, and the detachable part is located outside the mounting groove.

[0016] In one example, the outer wall of the guide member is provided with a mounting boss, the bottom of the mounting boss is in contact with the surface of the propeller blade, the top of the mounting boss is inclined to transition with the surface streamline of the propeller blade, and the detachable part is provided on the mounting boss.

[0017] In one example, the detachable component is a screw, the mounting boss is provided with a stepped through hole, the propeller blade is provided with a threaded hole, the threaded portion of the screw passes through the through hole and connects to the threaded hole, and the head of the screw is recessed into the interior of the stepped through hole.

[0018] Secondly, this application provides a drone, including a body, a power unit, and a drone propeller as described in any of the above, wherein the power output shaft of the power unit is connected to the power connection part.

[0019] The drone provided in this application includes the drone propeller in any of the above embodiments, and therefore the drone also has the above-mentioned technical effects of the drone propeller. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a drone propeller provided in one embodiment of this application;

[0021] Figure 2 for Figure 1 The diagram shows a partial exploded view of the UAV propeller.

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the flow guide in one embodiment of this application;

[0024] Figure 5 for Figure 4 A schematic diagram of the guide element in another direction;

[0025] Figure 6 for Figure 2 A further enlarged schematic diagram of the mounting groove and flow guide;

[0026] Figure 7 This is a schematic diagram showing the positions of the mounting boss, screw, and threaded hole in an embodiment of this application.

[0027] in, Figures 1 to 7 The one-to-one correspondence between the reference numerals and component names in the attached drawings is as follows:

[0028] 1 Connecting seat; 11 Power connection part; 2 Propeller blade; 21 Surface; 22 Side edge; 23 Mounting groove; 231 Groove opening; 232 Groove bottom; 24 Threaded hole; 3 Guide component; 31 First bending plate; 32 Second bending plate; 33 Connecting column; 34 Mounting boss; 341 Stepped through hole; 4 Detachable part. Detailed Implementation

[0029] Regarding the issue of reducing airflow energy loss mentioned in the background art, the inventors of this application have conducted extensive research. The research revealed that the common understanding among those skilled in the art regarding reducing airflow energy loss is to process the propeller blade surface to a smooth surface. The inventors of this application found that smooth surfaces easily generate turbulence and eddies, thus reducing local airflow velocity variations and increasing energy loss. Following this research, a technical solution different from existing approaches is proposed, which can reduce airflow energy loss and enhance propeller thrust.

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] This application provides an embodiment of a drone, including a fuselage, a power unit, and a drone propeller. The power unit and the drone propeller are mounted on the fuselage. The power unit provides rotational power to the drone propeller. The power unit may include a motor, and may also include other power transmission components besides a motor.

[0032] Please refer to Figures 1 to 7 , Figure 1 This is a schematic diagram of the structure of a drone propeller provided in one embodiment of this application; Figure 2 for Figure 1 The diagram shows a partial exploded view of the UAV propeller. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the flow guide in one embodiment of this application; Figure 5 for Figure 4 A schematic diagram of the guide element in another direction; Figure 6 for Figure 2 A further enlarged schematic diagram of the mounting groove and flow guide; Figure 7 This is a schematic diagram showing the positions of the mounting boss, screw, and threaded hole in an embodiment of this application.

[0033] In this embodiment, the UAV propeller includes a connecting seat 1, at least two propeller blades 2, and a guide member 3. The connecting seat 1 is provided with a power connection portion 11 for connecting to the power output shaft of a power component. The power connection portion 11 can be a hole structure, and the power output shaft and the hole structure can be connected by a key connection or interference fit, etc., to transmit power from the power component to the power connection portion 11.

[0034] In this embodiment, the propeller blade 2 is fixedly connected to the connecting seat 1 circumferentially. The propeller blade 2 and the connecting seat 1 can be welded together or integrally formed by a process. The number of propeller blades 2 is at least two, with each propeller blade 2 spaced apart and evenly distributed along the circumference of the connecting seat 1. The figure shows a specific embodiment where the connecting seat 1 is connected to two propeller blades 2. The two propeller blades 2 are approximately 180° apart. Of course, the number of propeller blades 2 can also be three, four, or more than five. The number of propeller blades 2 depends on the specific UAV product.

[0035] In this embodiment, at least one propeller blade 2 has a flow guide 3 on its surface 21. The number of flow guides 3 on the propeller blade 2 is two or more, and all flow guides 3 on the same propeller blade 2 are arranged at intervals along a first direction, wherein the length direction of the propeller blade 2 is defined as the first direction in this application. The flow guide 3 extends along a second direction, and the second direction forms an angle with the first direction. In this embodiment, the flow guide 3 is inclined relative to the first direction. The number of flow guides 3 on a single propeller blade 2 can be set according to the specific product structure and can be two or more arbitrary integers.

[0036] The guide member 3 extends to the side edge 22 of the propeller blade 2. The guide member 3 can be located on one side of the propeller blade 2 parallel to the centerline S in the first direction, extending from the centerline to the side edge 22. In this application, the two ends of the guide member 3 arranged along the second direction are defined as the first end and the second end. The first end is close to the centerline, and the second end is close to the side edge 22. That is, the first end is located on the side of the second end away from the side edge 22 of the propeller blade 2. The second end of the guide member 3 can extend to the side edge 22, or it can be at a certain distance from the side edge 22.

[0037] In this embodiment, the guide member 3 protrudes from the surface of the propeller blade 2, making the airflow smoother over the surface of the propeller blade 2, reducing the generation of turbulence and eddies, thereby reducing energy loss. It also increases the force-bearing area of ​​the propeller blade 2 to a certain extent, reducing turbulence and energy loss, and can expand the effective area of ​​the propeller to enhance thrust, which is particularly significant in scenarios requiring greater lift.

[0038] In this example, from the first end to the second end, the height of the guide member 3 exposed outside the propeller blade 2 gradually increases. The shape of the guide member 3 outside the propeller blade 2 is streamlined, and the guide member 3 is biomimetic feather-shaped. The biomimetic feather shape imitates the structure of bird feathers. This guide member 3 has the characteristics of bending and gradual expansion. The gradual expansion allows the airflow to gradually diffuse as it passes through, reducing local airflow speed changes, thereby reducing energy loss, stabilizing the airflow, reducing vibration during flight, and improving flight stability.

[0039] In one specific embodiment, the guide member 3 includes a first bending plate 31 and a second bending plate 32, which are arranged at a certain angle. The second bending plate 32 is fixedly connected to the propeller blade 2. At least a portion of the first bending plate 31 is exposed outside the propeller blade 2. From the first end to the second end, the width of the first bending plate 31 and / or the second bending plate 32 gradually increases. The width refers to the dimension in the direction perpendicular to the second direction.

[0040] In this embodiment, the first bending plate 31 and the second bending plate 32 are plate-shaped structures, which increase the force-bearing area of ​​the propeller blade 2, so that more airflow can be effectively utilized. The larger force-bearing area means that more airflow can be converted into lift and thrust, thereby improving the overall performance of the propeller. In addition, the structure of the guide 3 is relatively simple.

[0041] Furthermore, the flow guide 3 also includes a connecting post 33, which extends along the second direction, with a first bending plate 31 and a second bending plate 32 respectively connected to both sides of the connecting post 33. The connecting post 33 improves the strength of the flow guide 3 to a certain extent.

[0042] The propeller blade 2 is provided with a mounting groove 23. Both the connecting post 33 and the second bending plate 32 are partially located inside the mounting groove 23, and the ends of the connecting post 33 and the second bending plate 32 near the side edge 22 extend out of the mounting groove 23. As can be seen from the figure, the bottom 232 of the mounting groove 23 intersects with the surface 21, that is, the side of the groove opening 231 near the side edge 22 is an open structure.

[0043] In this way, the guide component 3 can be inserted into the mounting groove 23 from the side of the mounting groove 23 near the side edge 22, which is convenient for installation. Furthermore, the size of the guide component 3 is not limited by the length of the mounting groove 23. As long as the guide component 3 has a structure that is compatible with the mounting groove 23, it can be installed in the mounting groove 23. In this way, the mounting groove 23 can install guide components 3 of different sizes, improving the adaptability and flexibility of the UAV.

[0044] A first guide surface 311 can be provided on the end face of the first bending plate 31 away from the side edge, and a second guide surface 312 can be provided on the end face of the first bending plate 31 near the side edge. This is beneficial for the airflow to be guided from the surface of the propeller blade to the first bending plate 31, or to guide the airflow on the first bending plate 31 to the propeller blade or the outside.

[0045] In the above embodiments, the drone propeller also includes a detachable component. The guide component 3 is installed on the propeller blade 2 through the detachable component. The detachable connection design between the guide component 3 and the propeller blade 2 allows for quick replacement when the feathers are damaged or worn, without disassembling the entire propeller. This simplifies the maintenance process, extends the service life of the propeller, and allows for quick replacement of biomimetic feather components of different sizes and shapes according to different flight missions and environments, thereby improving the adaptability and flexibility of the drone.

[0046] In one specific embodiment, the propeller blade 2 has an installation groove 23, which corresponds one-to-one with the guide member 3. The guide member 3 is partially fitted and fixed inside the installation groove 23, and the detachable part is located outside the installation groove 23, which facilitates the installation and removal of the guide member 3.

[0047] In this embodiment, the outer wall of the guide member 3 is provided with a mounting boss 34. The bottom of the mounting boss 34 is in contact with the surface of the propeller blade 2, and the top of the mounting boss 34 is inclined to transition smoothly with the surface of the propeller blade 2. A detachable part is provided on the mounting boss 34.

[0048] In this embodiment, the top of the mounting boss 34 is tilted, so that the guide member 3 and the surface of the propeller blade 2 form a continuous gradient curved surface, reducing the risk of airflow separation. Furthermore, the tilted surface guides the airflow to smoothly transition along the rotation direction of the propeller blade 2, suppressing the generation of tip vortices.

[0049] In conjunction with the above embodiments, the guide member 3 includes a structure comprising a first bending plate 31, a second bending plate 32, and a connecting post 33. The detachable member can connect the second bending plate 32 and the propeller blade 2. Specifically, the detachable member connects the portion of the second bending plate 32 or the connecting post 33 located outside the mounting groove 23.

[0050] In one specific embodiment, the detachable component 4 is a screw. The mounting boss 34 is provided with a stepped through hole 341, and the propeller blade 2 is provided with a threaded hole 24. The threaded portion of the screw passes through the through hole and connects to the threaded hole 24, and the head of the screw is recessed into the interior of the stepped through hole 341. The screw connection is relatively simple and occupies little space.

[0051] In this embodiment, the head of the screw is recessed into the stepped through hole 341, which can prevent the screw from protruding from the mounting boss 34 and affecting the airflow, thus improving the smoothness of the airflow.

[0052] In the above embodiments, the first bending plate 31, the second bending plate 32, the connecting column 33 and the mounting boss 34 can all be made of carbon fiber, plastic composite material or glass fiber. These materials can effectively reduce weight while ensuring strength.

[0053] For other structures of the drone mentioned in this application, please refer to the prior art; they will not be elaborated upon here.

[0054] The drone in this application embodiment includes the drone propeller in any of the above embodiments, so the drone also has the above-mentioned technical effects of the drone propeller.

[0055] The directional terms mentioned in the embodiments of this application, such as "inner" and "outer", are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] In the description of the embodiments in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0057] In the embodiments of this application, "or / and" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0058] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A drone propeller, characterized in that, include: The connecting seat (1) is provided with a power connection part (11); At least two propeller blades (2), each of the propeller blades (2) being connected to the connecting seat (1) in the circumferential direction; At least two guide elements (3) are connected to the surface of at least one of the propeller blades (2), and the guide elements (3) at least partially protrude from the surface of the propeller blade (2); each of the guide elements (3) is arranged at intervals along a first direction, the guide elements (3) extend along a second direction, the first direction and the second direction are at an angle, the first direction is the length direction of the propeller blade (2), and the guide elements (3) extend to the side edge (22) of the propeller blade (2).

2. The UAV propeller according to claim 1, characterized in that, The guide member (3) includes a first end and a second end arranged along the second direction. The first end is located on the side of the second end away from the side edge (22) of the propeller blade (2). The structure of the guide member (3) exposed outside the propeller blade (2) is streamlined, and the height of the guide member (3) exposed outside the propeller blade (2) gradually increases from the first end to the second end.

3. The UAV propeller according to claim 2, characterized in that, The guide (3) includes a first bending plate (31) and a second bending plate (32). The first bending plate (31) and the second bending plate (32) are set at a certain angle. The second bending plate (32) is fixedly connected to the propeller blade (2). At least a portion of the first bending plate (31) is exposed outside the propeller blade (2). From the first end to the second end, the width of the first bending plate (31) or / and the second bending plate (32) gradually increases.

4. The UAV propeller according to claim 3, characterized in that, The guide (3) also includes a connecting post (33) that extends along the second direction, and the first bending plate (31) and the second bending plate (32) are respectively connected to both sides of the connecting post (33).

5. The UAV propeller according to claim 4, characterized in that, The propeller blade (2) is provided with a mounting groove (23), and both the connecting post (33) and the second bending plate (32) are partially located inside the mounting groove (23). The ends of the connecting post (33) and the second bending plate (32) near the side edge (22) extend out of the mounting groove (23).

6. The UAV propeller according to any one of claims 1 to 5, characterized in that, It also includes a detachable component (4), through which the guide component (3) is mounted to the propeller blade (2).

7. The UAV propeller according to claim 6, characterized in that, The propeller blade (2) has an installation groove (23) that corresponds to the flow guide (3). The flow guide (3) is partially fitted and fixed inside the installation groove (23), and the detachable part (4) is located outside the installation groove (23).

8. The UAV propeller according to claim 7, characterized in that, The outer wall of the guide member (3) is provided with a mounting boss (34). The bottom of the mounting boss (34) is in contact with the surface of the propeller blade (2). The top of the mounting boss (34) is inclined to transition with the surface streamline of the propeller blade (2). The detachable part (4) is provided on the mounting boss (34).

9. The UAV propeller according to claim 8, characterized in that, The detachable part (4) is a screw. The mounting boss (34) is provided with a stepped through hole. The propeller blade (2) is provided with a threaded hole (24). The threaded part of the screw passes through the through hole and connects to the threaded hole (24). The head of the screw is recessed into the interior of the stepped through hole.

10. A drone, characterized in that, It includes a body, a power unit, and a UAV propeller as described in any one of claims 1 to 9, wherein the power output shaft of the power unit is connected to the power connection part (11).

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