Unmanned aerial vehicle arm with round head and square tail

Abstract

The utility model relates to the technical field of unmanned aerial vehicle accessories, in particular to a square unmanned aerial vehicle arm with a round head and a square tail, which comprises a hollow main body section, a first end part and a second end part, the first end part and the second end part are fixedly connected to two ends of the main body section respectively, and the first end part is in a round tube shape and is used for being connected with a fuselage of an unmanned aerial vehicle; the second end is in a square tube shape and used for being connected with a power assembly of the unmanned aerial vehicle. And the section of the top of the main body section is arc-shaped, so that the air resistance is reduced. Finally, the unmanned aerial vehicle has obvious advantages in the aspects of improving the flight efficiency and the stability of the unmanned aerial vehicle, and can meet the dual requirements of the modern unmanned aerial vehicle on the performance and the economical efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of drone accessories, and in particular to a drone arm with a round head and a square tail. Background Technology

[0002] A rotary-wing drone typically consists of a main body, a rotor-shaped flight body, and arms. The main body is connected to at least two rotor-shaped flight bodies via the arms. The rotor-shaped flight body typically consists of a motor and a propeller mounted on the motor's rotating shaft (i.e., the motor's rotating shaft and the propeller are coaxially connected). The arms are actually connected to the motor at the tail.

[0003] In the field of drone technology, the arm, as a key component connecting the fuselage and power unit, directly affects the performance of the drone. For example, Chinese patent document CN222496685U discloses an integrated carbon fiber arm for drones, including an upper arm, a reinforcing arm fixed to the bottom end of the upper arm, a lower arm fixed to the end of the reinforcing arm away from the upper arm, a second side arm fixed to one outer wall of the upper arm, a first side arm fixed to the outer wall of the upper arm away from the second side arm, a mounting base provided on the outer wall of the first side arm away from the lower arm, and drone mounts installed at both ends of the second side arm.

[0004] The main body of the drone arm in this patent is a traditional columnar structure. When facing the high-speed airflow generated by the propeller, the surface of the arm is prone to airflow disturbance, resulting in reduced flight efficiency. Furthermore, the connection method between the arm and the fuselage and power components is relatively conventional, making installation and disassembly inconvenient and hindering the rapid maintenance and component replacement of the drone.

[0005] Existing drone arms generally suffer from high air resistance, severe airflow disturbances affecting flight efficiency, unstable connection between the arm and the fuselage and power components, inconvenient installation and disassembly, insufficient structural strength, large weight, and high production costs. There is an urgent need for a newly designed arm to solve these problems. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] This utility model provides a round-headed, square-tailed drone arm, comprising a hollow main body section, a first end, and a second end. The first end and the second end are respectively fixed to the two ends of the main body section. The first end is configured as a circular tube for connecting to the drone's fuselage; the second end is configured as a square tube for connecting to the drone's power components; the cross-sectional shape of the top of the main body section is configured as an arc to reduce air resistance.

[0008] As a further embodiment of this utility model: the cross-sectional shape of the bottom of the main body segment is set to be arc-shaped, and the curvature of the bottom arc is greater than that of the top arc. A smooth transition extension is provided between the top arc portion and the bottom arc portion of the main body segment, so that the outer wall of the main body segment forms a smooth and continuous surface, which facilitates the smooth passage of airflow.

[0009] As a further aspect of this invention, the cross-sectional shape of the main body segment is set to a streamlined shape with a rounded top and a pointed bottom, thereby reducing air resistance.

[0010] As a further embodiment of this utility model: a first transition portion is provided between the side wall of the first end and the side wall of the main body segment. The first transition portion smoothly transitions along the side wall of the main body segment and the side wall of the first end to form a curved surface with a certain curvature.

[0011] As a further embodiment of this utility model: a second transition portion is provided between the side wall of the second end and the side wall of the main body segment. The second transition portion smoothly transitions along the side wall of the main body segment and the side wall of the second end to form a curved surface with a certain curvature.

[0012] As a further embodiment of this utility model: the bottom of the second end is provided with a side wall that is inclined downward at a certain angle, thereby forming a downwardly extending arched structure, so that the cross-sectional shape of the bottom of the second end forms an arc with a certain curvature.

[0013] As a further embodiment of this utility model: a quick-release connector is fixedly connected to the first end, one end of the quick-release connector is fixedly connected to the first end, and the other end is detachably fixedly connected to the fuselage of the drone.

[0014] As a further embodiment of this utility model: the top of the second end is provided with a mounting hole for mounting a power component; the side of the second end away from the main body is provided with an opening for assisting in the mounting of the power component; the opening is provided with a plug for sealing the opening.

[0015] As a further embodiment of this utility model: the main body segment, the first end and the second end are all made of carbon fiber material and are integrally molded using an integral molding process.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. Enhanced Aerodynamic Performance: The top of the main arm section of this UAV is curved, and the bottom is also curved with a greater curvature than the top. The extension between the two sections forms a special wing-like shape, which conforms to aerodynamic principles, effectively reducing air resistance, lowering flight energy consumption, and improving flight efficiency. Simultaneously, the streamlined shape of the main arm section—an inverted teardrop shape with a rounded top and a pointed bottom—reduces airflow separation, friction, and vortices on its surface, further reducing drag and enhancing flight performance.

[0018] 2. Enhanced Structural Stability: The first end is designed as a circle, facilitating a stable connection with the fuselage via a quick-release joint. This quick-release joint also enables electrical connection, supplying power and control to the power components. The second end is square, ensuring a secure connection with the power components and enhancing overall structural stability. The curved and streamlined shape at the bottom of the main body section forms a reinforcing rib structure, improving the arm's torsional strength and load-bearing capacity, ensuring excellent performance under complex flight conditions.

[0019] 3. Enhanced Convenience and Safety: The quick-release connector at the first end facilitates rapid installation and disassembly of the arm and fuselage, simplifying drone maintenance and component replacement. The second end features mounting holes and openings for easy installation of the power components. After installation, the openings can be sealed with plugs to protect internal components from dust and water vapor, improving operational safety.

[0020] 4. Cost and Weight Optimization: The curved design at the bottom of the main arm section enhances structural stability while reducing the number of carbon fiber layers required in production, thus lowering production costs. The entire body is made of carbon fiber and molded in one piece, ensuring high strength and rigidity while effectively reducing overall weight and improving the drone's overall performance.

[0021] Therefore, this invention provides a drone arm with a rounded head and a square tail, reducing air resistance, minimizing airflow disturbance, and improving flight efficiency. It offers significant advantages in improving the flight efficiency and stability of drones, meeting the dual demands of modern drones for performance and economy.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0024] Figure 1 This is a schematic diagram of the structure of the first end and the quick-release connector of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the second end and the power component of this utility model;

[0026] Figure 3 This is a schematic diagram of the bottom of the main body section and the arched structure of this utility model;

[0027] Figure 4 This is a structural schematic diagram of the extension portion and the bottom of the main body section of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the first end and the first transition part of this utility model.

[0029] The reference numerals and names in the figure are as follows:

[0030] 10 Main body section; 11 Top; 12 Bottom; 13 Extension section; 20 First end; 21 First transition section; 22 Quick-release connector; 23 Connecting terminal; 30 Second end; 31 Second transition section; 32 Arched structure; 33 Mounting hole; 34 Plug; 35 Power assembly. Detailed Implementation

[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Please see Figures 1 to 5 In this embodiment of the present invention, a round-headed, square-tailed drone arm includes a hollow main body section 10, a first end 20, and a second end 30. The first end 20 and the second end 30 are respectively fixed to the two ends of the main body section 10. The first end 20 is a circular tube for connecting to the drone's fuselage; the second end 30 is a square tube for connecting to the drone's power assembly 35. The top 11 of the main body section 10 has an arc-shaped cross-section to reduce air resistance.

[0033] Specifically, the drone's power unit 35 typically includes a motor and a propeller. The motor is mounted at the second end 30 of the arm, away from the fuselage. The propeller is connected to the motor's output shaft, causing the motor to rotate and drive the propeller to rotate, creating a high-speed downward flow of air, thus propelling the drone into flight. Typically, the drone's propeller is mounted above the arm to better propel the air upwards. However, the high-speed downward airflow generated by the propeller can easily cause disturbances when passing over the drone's arm, affecting the high-speed airflow and even reducing the drone's flight efficiency.

[0034] Therefore, the main body section 10 of the arm needs to be improved by making the top 11 of the arm facing the airflow an arc-shaped protrusion, thereby reducing wind resistance, reducing airflow disturbance, and improving flight efficiency. The arc-shaped design of the top 11 of the main body section 10 can also be understood as a unique top 11 protrusion. The design of the top 11 of the arm as a circular protrusion helps to reduce air resistance during flight and improve flight efficiency.

[0035] Secondly, the first end 20 is circular for easy and stable quick-release connection to the fuselage; the second end 30 is square to ensure a secure connection with the UAV power assembly 35, enhancing the overall structural stability. The middle section adopts a streamlined shape with a rounded top and pointed bottom, which reduces air resistance and forms a reinforcing rib structure, effectively improving the arm's torsional strength and load-bearing capacity, maintaining excellent performance even under complex flight conditions. The entire body is made of carbon fiber, which has extremely high strength and rigidity, and the lightweight nature of carbon fiber reduces the overall weight.

[0036] like Figure 4 and Figure 5 As shown, preferably, the cross-sectional shape of the bottom 12 of the main body segment 10 is set to be arc-shaped, and the curvature of the bottom 12 arc is greater than the curvature of the top 11 arc. A smooth transition extension 13 is provided between the top 11 arc portion and the bottom 12 arc portion of the main body segment 10, so that the outer wall of the main body segment 10 forms a smooth and continuous surface, which facilitates the smooth passage of airflow.

[0037] Specifically, according to Bernoulli's principle, the shape of the main body section 10 can be optimized and improved. The curvature of the top arc 11 is less than that of the bottom arc 12, and the smooth transition between the two through the extension 13 forms a special wing-like shape, which is more in line with aerodynamics, thereby reducing air resistance and reducing flight energy consumption.

[0038] Secondly, the arc-shaped design of the bottom 12 of the main body section 10 can also form a reinforcing rib structure, making the overall structure of the arm more stable. At the same time, it can reduce the number of carbon fiber bonding layers in the production process, reduce production costs, and also reduce the weight of the arm.

[0039] like Figure 5 As shown, preferably, the cross-sectional shape of the main body segment 10 is set as a streamlined shape with a round upper part and a pointed lower part, thereby reducing air resistance.

[0040] Specifically, the cross-sectional shape of the main body segment 10 can be set as an inverted teardrop shape, that is, the upward part forms a relatively large diameter arc shape, while the downward part forms a relatively small diameter arc shape, and the extension part 13 forms a smooth transition between the two, so that the outer wall of the main body segment 10 forms a smooth and continuous surface, forming an object shape that allows fluid to flow smoothly.

[0041] Secondly, the streamlined shape design primarily aims to reduce the resistance of fluids (such as airflow) flowing over the surface of the object. This prevents airflow from separating as it flows over the surface of the main body section 10, thereby reducing friction and eddies, which in turn lowers drag and improves flight efficiency.

[0042] Alternatively, it can be understood that if the upper and lower parts of the streamlined shape of the main body segment 10 are approximated as arcs, the curvature of the upper circular part is less than that of the lower pointed part. For example, the upper circular part might be an arc with a larger radius (relatively smaller curvature), while the lower pointed part might be an arc with a smaller radius (relatively larger curvature). The different degrees of curvature between the upper and lower arcs can be described by the change in the magnitude of the curvature. An extension 13 is used to smoothly transition the edges of the arcs, forming a streamlined overall shape.

[0043] like Figures 3 to 5 As shown, preferably, a first transition portion 21 is provided between the side wall of the first end portion 20 and the side wall of the main body segment 10. The first transition portion 21 smoothly transitions along the side wall of the main body segment 10 and the side wall of the first end portion 20 to form a curved surface with a certain curvature.

[0044] Specifically, in order to reduce air turbulence, it is preferable to provide a first transition section 21 between the main body section 10 and the first end section 20, and use the curvature of the curved surface to form a smooth transition shape structure to optimize air flow.

[0045] like Figure 4 As shown, preferably, a second transition portion 31 is provided between the side wall of the second end portion 30 and the side wall of the main body segment 10. The second transition portion 31 smoothly transitions along the side wall of the main body segment 10 and the side wall of the second end portion 30 to form a curved body with a certain curvature.

[0046] Similarly, in order to reduce air turbulence, it is preferable to provide a second transition section 31 between the main body section 10 and the second end section 30, and to form a smooth transition shape structure by utilizing the curvature of the curved surface to optimize air flow.

[0047] like Figure 3 and Figure 4 As shown, preferably, the bottom 12 of the second end 30 is provided with a sidewall that is inclined downward at a certain angle, thereby forming a downwardly extending arched structure 32, so that the cross-sectional shape of the bottom 12 of the second end 30 forms an arc with a certain curvature.

[0048] Specifically, to optimize the aerodynamic structure of the second end 30, an arc-shaped arch structure 32 can be provided at the bottom 12 of the second end 30, thereby reducing air turbulence and improving flight efficiency. Understandably, a smooth transition curved surface is also used between the arched bottom 12 of the second end 30 and the arc-shaped bottom 12 of the main body section 10 to further optimize airflow.

[0049] like Figure 1 As shown, preferably, the first end 20 is fixedly connected to a quick-release connector 22, one end of which is fixedly connected to the first end 20, and the other end is detachably fixed to the fuselage of the drone.

[0050] Specifically, to optimize the connection between the arm and the fuselage, a quick-release connector 22 can be provided at the first end 20. This quick-release connector 22 allows for rapid installation or removal of the arm from the fuselage. The quick-release connector 22 can utilize existing quick-release technology structures to achieve quick-release operation. Preferably, the quick-release connector 22 is inserted into a circular tubular structure at the first end 20 and secured with adhesive. Furthermore, the quick-release connector 22 is equipped with a connection terminal 23, thereby forming an electrical connection with the fuselage to supply power and control the power assembly 35 at the second end 30.

[0051] like Figure 2 and Figure 3 As shown, preferably, the top 11 of the second end 30 is provided with a mounting hole 33 for mounting the power assembly 35; the side of the second end 30 away from the main body section 10 is provided with an opening for assisting in the mounting of the power assembly 35; the opening is provided with a plug 34 for sealing the opening.

[0052] Specifically, to facilitate the connection of the power assembly 35, the second end 30 can be designed as a square tube, allowing for a better fit with the motor mount of the power assembly 35. Correspondingly, mounting holes 33 can be provided in the second end 30 to secure the motor mount. The motor mount can be installed on the top 11 of the second end 30 or directly inside the second end 30. Therefore, an opening can be provided on the side of the second end 30 to facilitate the insertion of the relevant accessories of the power assembly 35 into the second end 30, which are then locked in place through the mounting holes 33. Furthermore, the special shape of the second end 30 prevents internal accessories from being damaged or dislodged, increasing the stability of the propeller.

[0053] Secondly, after installation, the opening can be sealed with the plug 34 to further protect the internal components from dust or water vapor.

[0054] Preferably, the main body segment 10, the first end 20, and the second end 30 are all made of carbon fiber and are integrally molded using an integral molding process.

[0055] Specifically, in order to further reduce the weight of the arm and improve its strength and rigidity, carbon fiber material can be used for its manufacture, and it can be manufactured in one piece using the existing one-piece molding process.

[0056] The specific processing flow includes: First, creating a corresponding mold based on the production size requirements. Due to the special square tubular structure of the second end 30, a single inner mold would not allow for demolding. Therefore, a separate sliding block mold method can be used to create the appropriate internal mold. Then, carbon fiber prepreg is cut according to the mold structure and attached to the mold surface. After attachment, a thermoforming operation is performed, followed by demolding. Finally, sanding and painting can be carried out to improve surface smoothness and further reduce air resistance.

[0057] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A head circle tail square unmanned aerial vehicle arm, characterized in that, The utility model relates to a kind of unmanned aerial vehicle power assembly connecting device, including the main body section (10) of internal hollow setting, first end (20) and second end (30), first end (20) and second end (30) are respectively fixed to the both ends of main body section (10), the first end (20) is set as circular tubular, for connecting the fuselage of unmanned aerial vehicle;The second end (30) is set as square tubular, for connecting the power assembly (35) of unmanned aerial vehicle;The top (11) of the main body section (10) is set as arc shape in section shape, to reduce air resistance.

2. The head-round-tail-square unmanned aerial vehicle arm according to claim 1, wherein, The bottom (12) of the main body section (10) is set as arc shape in section shape, and the curvature of bottom (12) arc is greater than the curvature of top (11) arc, and the top (11) arc portion of main body section (10) and the bottom (12) arc portion are provided with the extension (13) of smooth transition, so that the outer wall of main body section (10) forms smooth, continuous surface, and air flow is conveniently and smoothly passed.

3. The head-square-tail rectangular unmanned aerial vehicle arm of claim 2, wherein, The main body section (10) is set as the stream line body shape of upper circle and lower sharp in section shape, to reduce air resistance.

4. The head-round-tail-square unmanned aerial vehicle arm according to claim 1, wherein, The sidewall between first end (20) and the sidewall of main body section (10) is equipped with first transition (21), and first transition (21) is smoothly transitioned along the sidewall of main body section (10) and the sidewall of first end (20), to form curved surface body with certain bending curvature.

5. The head-round-tail-square unmanned aerial vehicle arm according to claim 1, wherein, The sidewall between second end (30) and the sidewall of main body section (10) is equipped with second transition (31), and second transition (31) is smoothly transitioned along the sidewall of main body section (10) and the sidewall of second end (30), to form curved surface body with certain bending curvature.

6. The head circular tail square unmanned aerial vehicle arm of claim 5, wherein, The bottom (12) of second end (30) is equipped with sidewall that is inclined downward by certain angle, to form downwardly extending arch structure (32), so that the section shape of bottom (12) of second end (30) forms arc with certain curvature.

7. The head-round-tail-square unmanned aerial vehicle arm according to claim 1, wherein, First end (20) is fixed with quick release joint (22), one end of quick release joint (22) is fixed to first end (20), and the other end is detachably fixed to the fuselage of unmanned aerial vehicle.

8. The head-square-tail rectangular unmanned aerial vehicle arm of claim 1, wherein, The top (11) of second end (30) is equipped with mounting hole (33) for installing power assembly (35), and the side of second end (30) away from main body section (10) is equipped with opening for assisting installation power assembly (35), and the opening is equipped with plug (34) for plugging opening.

9. The head-square-tail rectangular unmanned aerial vehicle arm of any one of claims 1-8, wherein, The main body section (10), first end (20) and second end (30) are all made of carbon fiber material, and are integrally formed by integral forming process.

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