Unmanned aerial vehicle arm and tail wing mounting structure

Abstract

This utility model relates to the field of unmanned aerial vehicle (UAV) equipment fixing structure technology, and provides a UAV arm and tail fin mounting structure, including: an arm, a tail fin connecting molded component, and a tail fin; the arm is fixedly connected to the tail fin via the tail fin connecting molded component; two support plate nuts are embedded in the inner wall of the end of the tail fin connecting molded component connected to the arm; arm fixing bolts fix the tail fin connecting molded component to the arm via the support plate nuts; the end of the tail fin connecting molded component connected to the tail fin is provided with several second threaded holes; the end of the tail fin connecting molded component connected to the tail fin adopts an embedded skin extension structure, the trailing edge of the skin extension structure of the tail fin connecting molded component is designed with a progressive contraction angle, and the tail fin is provided with a third threaded hole corresponding to the position of the second threaded hole; the tail fin connecting molded component is fixedly connected to the tail fin via tail fin fixing bolts. This solves the problems of poor compatibility, cumbersome disassembly and assembly, and large aerodynamic losses in traditional tail fin installations, improves assembly efficiency, and reduces induced drag.

Description

Technical Field

[0001] This application relates to the field of unmanned aerial vehicle (UAV) structural technology, and more particularly to a UAV arm and tail fin mounting structure. Background Technology

[0002] During flight, the tail fin plays a crucial role in stabilizing and altering the flight attitude of a drone. Current drone tail fin mounting structures generally face the following technical bottlenecks:

[0003] Poor compatibility: Traditional tail fins use a direct arm-connected design, requiring customized arm interfaces for different tail fin sizes and aerodynamic shapes; furthermore, the installation structure of traditional UAV arms and tail fins needs to be designed independently during the design process of the UAV tail fin, increasing the workload of the design work, consuming more time and effort, resulting in a longer development cycle and increased spare parts management costs.

[0004] Low assembly and disassembly efficiency: Mainstream solutions use adhesive or riveting for fixing, requiring damage to the original structure to replace the tail fin. Insufficient flexibility in installing different tail fins or inconvenient adjustments negatively impact the ease of operation during drone assembly. While quick-release structures improve speed, they have two major drawbacks: First, insufficient vibration resistance: During drone flight, the quick-release structure connecting the tail fin may loosen due to aerodynamic forces, affecting flight safety. Second, only compatible with a single tail fin type: The fixed spacing of the quick-release structure's clips makes it incompatible with different fin root thicknesses.

[0005] Aerodynamic interference issues: The split connectors create a step difference at the junction of the arm and tail, causing airflow separation and increasing the induced drag of the UAV.

[0006] Severe structural redundancy: In order to improve versatility, some solutions use multiple sets of mounting holes, but this results in a 15% decrease in the tail fin's weight reduction rate, and the dense openings weaken the structural strength.

[0007] Therefore, a new type of mounting structure for the drone's arms and tail is needed to solve the above problems. Summary of the Invention

[0008] To address the technical problems existing in the background art, this utility model proposes a drone arm and tail fin mounting structure, which has the ability to assemble tail fins of different types and sizes, and also features easy loading and unloading and high stability.

[0009] To achieve the above objectives, this application provides the following solution:

[0010] A drone arm and tail fin mounting structure includes: an arm, a tail fin connecting molded part, and a tail fin; the arm is fixedly connected to the tail fin through the tail fin connecting molded part;

[0011] In the technical solution provided in this application, a further improvement is that the arm is a hollow composite integral molding structure; the tail wing connecting molding part is a composite molding structure, and the radius of curvature R=5D of the contact surface of the end of the tail wing connecting molding part connected to the arm is used to compensate for manufacturing errors through flexible deformation.

[0012] In the technical solution provided in this application, a further improvement is that two support plate nuts are embedded in the inner wall of the end of the tail wing connecting molded part that is connected to the arm; a first threaded hole is provided at the position of the support plate nuts at the end of the arm connected to the tail wing connecting molded part, and the arm fixing bolt passes through the first threaded hole to fix on the support plate nuts, thereby completing the fixed connection between the tail wing connecting molded part and the arm.

[0013] In the technical solution provided in this application, a further improvement is that the tail fin is a composite material sandwich structure, and the end of the tail fin connecting molded part connected to the tail fin adopts an embedded skin extension structure to cover the tail fin connection seam. The trailing edge of the skin extension structure of the tail fin connecting molded part is designed with a progressive contraction angle. Preferably, the contraction angle contraction ratio TR=0.85.

[0014] A further improvement in the technical solution provided in this application is that the tail wing connecting molded part is provided with a plurality of second threaded holes at one end connected to the tail wing; the tail wing is provided with a third threaded hole corresponding to the position of the second threaded hole, and the distance between two adjacent second threaded holes is equal to the distance between two adjacent third threaded holes; the tail wing fixing bolt passes through the second threaded holes and the third threaded holes to fix the tail wing connecting molded part to the tail wing.

[0015] In the technical solution provided in this application, during installation, the tail wing is first fixed to the tail wing connecting molded part by the tail wing fixing bolt, and then the tail wing connecting molded part is fixed to the arm by the arm fixing bolt and the support plate nut.

[0016] In the technical solution provided in this application, during disassembly, the arm and tail fin can be quickly separated simply by removing the arm fixing bolts from the arm, without the need for other tools, making the operation simple and quick. Removing the tail fin fixing bolts allows for the separation of the tail fin connecting molded part from the tail fin, enabling the installation of different tail fins and ensuring the flexibility of tail fin replacement.

[0017] The beneficial effects of the technical solution in this application are as follows:

[0018] Easy to install and disassemble: The arm is connected to the tail fin connecting molded part by hand-tightening screws, and the tail fin connecting molded part is connected to the tail fin by fixing screws, which can realize the quick connection between the arm and the tail fin, requiring fewer tools and saving assembly time.

[0019] High versatility: The tail fin connecting molded part is fixed to the tail fin with fixing screws. By replacing different sizes and types of tail fins, the needs of different drone models and different application scenarios can be met, providing more flexibility for the design and application of drones.

[0020] High stability: The tail fin and arms are fixed to the tail fin molded parts by fixing screws and hand-tightening screws, which are not easy to loosen due to vibration or force, thus ensuring the flight safety of the drone.

[0021] Zero-step surface fluid optimization: The tail wing end of the molded tail wing connection adopts an embedded skin extension structure, and the separation point is moved to the trailing edge of the tail wing to eliminate assembly gaps, reduce airflow step difference, and allow airflow to flow close to the body, thereby reducing induced drag. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the overall connection structure of the unmanned aerial vehicle (UAV) arm and tail fin mounting structure provided by this utility model;

[0024] Figure 2 A schematic diagram of a molded tail fin connection structure for a drone arm and tail fin mounting structure provided by this utility model;

[0025] Figure 3 A schematic diagram of a tail fin connection molding part and a tail fin mounting structure for a drone arm and tail fin mounting structure provided by this utility model;

[0026] Figure 4 This utility model provides a schematic diagram of the mounting structure for the boom and tail fin of a drone.

[0027] Explanation of the labels in the diagram:

[0028] 1. Arm; 2. Tail fin connecting molded part; 3. Tail fin; 4. Arm fixing bolts; 5. Tail fin fixing bolts; 6. Support plate nut. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1-4 As shown, a drone arm and tail fin mounting structure includes: an arm 1, a tail fin connecting molded part 2, and a tail fin 3; the arm 1 is fixedly connected to the tail fin 3 through the tail fin connecting molded part 2.

[0032] In the technical solution provided in this application, a further improvement is that the arm 1 is a hollow composite integral molding structure; the tail wing connecting molding part 2 is a composite molding structure, and the radius of curvature R of the contact surface at the end of the tail wing connecting molding part 2 connected to the arm 1 is 5D, where D is the diameter of the arm 1, and manufacturing errors are compensated by flexible deformation.

[0033] In the technical solution provided in this application, a further improvement is that two support plate nuts 6 are embedded in the inner wall of the end of the tail wing connecting molded part 2 that is connected to the arm 1; a first threaded hole is provided at the position of the support plate nut 6 at the end of the arm 1 that is connected to the tail wing connecting molded part 2, and the arm fixing bolt 4 passes through the first threaded hole and is fixed on the support plate nut 6, thereby completing the fixed connection between the tail wing connecting molded part 2 and the arm 1.

[0034] In the technical solution provided in this application, a further improvement is that the tail wing 3 is a composite material sandwich structure, and the end of the tail wing connecting molded part 2 connected to the tail wing 3 adopts an embedded skin extension structure to cover the connection seam of the tail wing 3.

[0035] Regarding the skin extension structure of the tail wing connecting molded part 2, a specific embodiment provided in this application is that the skin extension structure can be made by extending the carbon fiber layer of the tail wing connecting molded part 2 outward for a length ≥1.5D, where D is the diameter of the arm 1, used to cover the connecting seam of the tail wing 3, and adopting a variable thickness layup technology, with the thickness of the extension section gradually changing from 1.2mm to 0.6mm.

[0036] In the technical solution provided in this application, a further improvement is that the trailing edge of the skin extension structure of the tail wing connecting molded part 2 is designed with a progressive contraction angle, preferably, the contraction angle contraction ratio TR=0.85;

[0037] Regarding the trailing edge of the skin extension structure of the tail wing connecting molded part 2, a specific embodiment provided in this application is that the progressive contraction angle can use a 50μm thick silicone rubber film as a flexible transition, which is pre-embedded in the contact edge between the tail wing connecting molded part 2 and the tail wing 3. The contraction angle is preferably in the range of 8° to 12°, and the specific value can be dynamically adjusted with the Reynolds number to avoid airflow separation and make the airflow flow close to the body.

[0038] In the technical solution provided in this application, a further improvement is that a plurality of second threaded holes are provided at one end of the tail wing connecting molded part 2 connected to the tail wing 3; a third threaded hole is provided at the position corresponding to the second threaded hole of the tail wing 3, and the distance between two adjacent second threaded holes is equal to the distance between two adjacent third threaded holes; the tail wing fixing bolt 5 passes through the second threaded hole and the third threaded hole to fix the tail wing connecting molded part 2 and the tail wing 3.

[0039] In the technical solution provided in this application, during installation, the tail wing 3 is first fixed to the tail wing connecting molded part 2 by the tail wing fixing bolt 5, and then the tail wing connecting molded part 2 is fixed to the arm 1 by the arm fixing bolt 4 and the support plate nut 6.

[0040] In the technical solution provided in this application, during disassembly, the arm fixing bolt 4 can be removed from the arm 1 to achieve quick disassembly of the arm 1 and the tail fin 3 without the need for other tools, making the operation simple and quick. After removing the tail fin fixing bolt 5, the tail fin connecting molded part 2 and the tail fin 3 can be separated, enabling the installation of different tail fins 3 and ensuring the flexibility of tail fin 3 replacement.

[0041] It is worth mentioning that the illustrations provided in this application are only one application example of the organization, including but not limited to the models shown in the illustrations.

[0042] In the description of this application, it should be understood that the terms "upper", "lower", "opposite", "relative", "upper end face", "lower end face", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0044] The embodiments described above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made to the technical solutions of this application by those skilled in the art without departing from the spirit of this application shall fall within the protection scope defined by the claims of this application.

Claims

1. A mounting structure for the arm and tail of a drone, characterized in that, include: Arms, tail fin connecting molded parts and tail fin; The arm is fixedly connected to the tail fin via the tail fin connecting molded component; the radius of curvature of the contact surface of the tail fin connecting molded component connected to the arm is R=5D, where D is the diameter of the arm; two support plate nuts are embedded in the inner wall of the end of the tail fin connecting molded component connected to the arm. The arm end connected to the tail fin connecting molded component has a first threaded hole corresponding to the position of the support plate nut. The arm fixing bolt passes through the first threaded hole and is fixed to the support plate nut, completing the fixed connection between the tail fin connecting molded component and the arm. One end of the tail fin connecting molded component connected to the tail fin adopts an embedded skin extension structure to cover the tail fin connection seam. The trailing edge of the skin extension structure of the tail fin connecting molded component is designed with a progressive contraction angle. The one end of the tail fin connecting molded component connected to the tail fin has several second threaded holes. The tail fin has a third threaded hole corresponding to the position of the second threaded hole. The tail fin fixing bolt passes through the second threaded hole and the third threaded hole to fix the tail fin connecting molded component to the tail fin.

2. The UAV arm and tail mounting structure according to claim 1, characterized in that, The arm is a hollow composite integral molding structure; the tail fin connecting molding component is a composite molding structure, and the tail fin is a composite sandwich structure.

3. The UAV arm and tail mounting structure according to claim 2, characterized in that, The distance between two adjacent second threaded holes is equal to the distance between two adjacent third threaded holes.

4. The UAV arm and tail mounting structure according to claim 3, characterized in that, During installation, the tail fin is first fixed to the tail fin connecting molded component using the tail fin fixing bolts. Then, the tail fin connecting molded component is fixed to the arm using the arm fixing bolts and the support plate nut. During disassembly, the arm and tail fin can be quickly disassembled simply by removing the arm fixing bolts from the arm. After removing the tail fin fixing bolts, the tail fin connecting molded component can be separated from the tail fin.

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