Rotatable amphibious unmanned aerial vehicle arm structure

Abstract

The utility model provides a rotatable arm structure of an amphibious unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The problems that most of current underwater unmanned aerial vehicles are folding vehicle arms, the urgent to-be-optimized points are that rotating shafts at the connecting points of the vehicle arms and a vehicle body need to rotate, a certain gap exists, complete sealing cannot be achieved by replacing materials and the like, and the water inflow risk is large are solved. A rotatable amphibious unmanned aerial vehicle arm structure comprises an arm rod, a duct body and a sealing ring, the arm rod is fixedly installed on the duct body, a movable ring and a spring seat are fixedly arranged on the arm rod, a spring is arranged on the spring seat, a static ring is installed on the spring, the static ring is pressed on the movable ring by the spring, and the sealing ring is arranged on the duct body. And the sealing rings are arranged between the movable ring and the arm lever and between the static ring and the spring seat. The advantages that the arms are resistant to water immersion, and the waterproofness and precision are enhanced are achieved.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a rotatable amphibious UAV arm structure. Background Technology

[0002] The drone arm is an indispensable part of a drone. Structurally, it supports and fixes the fuselage, propellers, motors, and other components, maintaining the overall shape and structural stability of the drone. In terms of power transmission and installation, the motor and propeller are installed at the end of the arm, and the internal wiring channels integrate and protect the wires connecting various components, transmitting power and control signals. In flight attitude control, the flight control system adjusts the arm motor speed to achieve attitude control using the lever arm principle, increasing rotational inertia to improve stability. Functionally, the arm can carry cameras, sensors, and other equipment to meet different mission requirements; some also have special functions such as folding, integrated lighting, and obstacle avoidance sensors. However, most current underwater drones use folding arms. A key area for optimization is that the hinge at the connection point between the arm and the fuselage needs to rotate, creating a gap that cannot be completely sealed by changing materials, posing a significant risk of water ingress. Once water enters, it can irreversibly affect the drone's performance and lifespan. Furthermore, aerial movement requires vertical power, while underwater movement requires horizontal power, requiring the drone's propellers and motors to rotate during the transition from air to water. How to achieve the rotation of the boom to drive the rotation of the propeller and motor is a major challenge that needs to be solved. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a rotatable amphibious drone arm structure, which has the advantages of water-proof arm, enhanced waterproofness and precision. It solves the problem that most current underwater drones have foldable arms, and the urgent point of optimization is that the pivot at the connection point between the arm and the fuselage needs to rotate, which leaves a certain gap. It is impossible to achieve a complete seal by changing materials, etc., which poses a significant risk of water ingress.

[0005] (II) Technical Solution

[0006] To achieve the aforementioned purpose of preventing water immersion in the boom and enhancing its waterproofness and precision, this utility model provides the following technical solution: a rotatable amphibious unmanned aerial vehicle boom structure, comprising a boom rod, a duct body, and a sealing ring. The boom rod is fixedly installed on the duct body. A moving ring and a spring seat are fixedly installed on the boom rod. A spring is installed on the spring seat, and a stationary ring is installed on the spring. The stationary ring is pressed tightly against the moving ring by the spring. The sealing ring is installed between the moving ring and the boom rod, and between the stationary ring and the spring seat.

[0007] Preferably, the end of the boom is provided with an upper locking tooth.

[0008] Preferably, the end of the boom is further provided with a limiting seat, a limiting spring is provided on the limiting seat, a lower locking tooth is installed on the limiting spring, the lower locking tooth is pressed against the upper locking tooth by the limiting spring, and the lower locking tooth and the upper locking tooth mesh with each other.

[0009] Preferably, the material of the moving ring is silicon carbide.

[0010] Preferably, the stationary ring is made of graphite.

[0011] Preferably, the sealing ring is made of fluororubber.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, this utility model provides a rotatable amphibious drone arm structure, which has the following beneficial effects:

[0014] This rotatable amphibious drone arm structure utilizes the interplay of its various components. Sealing rings are installed between the rotating ring and the arm, and between the stationary ring and the spring seat. This mechanical seal effectively prevents water from being brought into the drone body during rotation, achieving waterproofing in underwater environments. The interlocking of upper and lower locking teeth allows for rotational limitation: when the arm is not rotating, the lower locking tooth is tightly engaged with the upper locking tooth by a limiting spring; when the arm rotates, the lower locking tooth moves downwards due to the action of the upper locking tooth, causing them to separate and allowing normal arm rotation. This achieves water resistance for the arm, enhances waterproofing and precision, and enables the arm's rotation to drive the propellers and motor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the rotatable amphibious drone arm structure according to the present invention.

[0016] In the diagram: 1. Moving ring; 2. Stationary ring; 3. Spring; 4. Spring seat; 5. Sealing ring; 6. Boom rod; 7. Duct body; 8. Upper clamping tooth; 9. Lower clamping tooth; 10. Limiting spring; 11. Limiting seat. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1 A rotatable amphibious unmanned aerial vehicle (UAV) arm structure is disclosed, comprising an arm rod 6, a duct 7, and a sealing ring 5. The arm rod 6, as the core component of the arm structure, plays a crucial role in support and connection. The duct 7 protects the arm rod 6 from external environmental interference and damage. The sealing ring 5 primarily functions to seal the connection between the rotating ring 1 and the arm rod 6, and between the stationary ring 2 and the spring seat 4, preventing water from entering the UAV. When the amphibious UAV performs underwater missions or flies in humid environments, the sealing ring 5 effectively blocks moisture, protecting the internal electronic components and mechanical parts from water corrosion and preventing equipment malfunction or damage due to water ingress. The sealing ring 5 is made of fluororubber (FKM), which possesses excellent chemical resistance and high-temperature stability.

[0019] The boom 6 is fixedly mounted on the duct body 7. A rotating ring 1 and a spring seat 4 are fixedly mounted on the boom 6. A spring 3 is mounted on the spring seat 4, and a stationary ring 2 is mounted on the spring 3. The stationary ring 2 is pressed tightly against the rotating ring 1 by the spring 3. The rotating ring 1 is made of silicon carbide and is directly mounted on the boom 6, rotating at high speed with the boom 6. Its surface is precision ground to ensure a high-precision sealing surface with the stationary ring 2. The stationary ring 2 is made of graphite and is tightly fitted to the rotating ring 1 by the preload provided by the spring 3. The stationary ring 2 is fixed inside the spring seat 4, ensuring the stability and reliability of the sealing surface. The spring 3 is located between the rotating ring 1 and the spring seat 4, providing continuous preload to maintain appropriate contact pressure between the rotating ring 1 and the stationary ring 2. The spring 3 is designed to compensate for temperature changes and wear, ensuring sealing performance during long-term operation. The spring seat 4, as the support structure for the entire sealing assembly, is fixed to the boom shaft. It not only provides the mounting position for the stationary ring 2 but also protects the internal components from external environmental influences. The spring seat 4 has multiple mounting holes for easy connection with other equipment components.

[0020] The end of the boom 6 is provided with an upper retaining tooth 8. The upper retaining tooth 8 is provided with a mounting hole and is fixed to the end of the boom 6.

[0021] A limiting seat 11 is also provided at the end of the boom 6. A limiting spring 10 is installed on the limiting seat 11, and a lower locking tooth 9 is mounted on the limiting spring 10. The lower locking tooth 9 is pressed against the upper locking tooth 8 by the limiting spring 10, and the lower locking tooth 9 and the upper locking tooth 8 mesh with each other. The lower locking tooth 9 is tightly fitted with the upper locking tooth 8 by the preload provided by the limiting spring 10, so that the two can be tightly fitted and can also rotate relative to each other as the boom 6 rotates. The limiting spring 10 is located between the lower locking tooth 9 and the limiting seat 11, providing a continuous preload, so that the upper locking tooth 8 and the lower locking tooth 9 can be tightly fitted and can also rotate relative to each other as the boom 6 rotates. The design of the limiting spring 10 takes into account temperature changes to ensure a stable preload during long-term operation. The limiting seat 11, as the support structure of the entire sealing assembly, is fixed to the boom 6, and it provides the installation position for the lower locking tooth 9. The limit seat 11 is also provided with multiple mounting holes to facilitate connection with other equipment components.

[0022] Working principle: A sealing ring 5 is installed between the rotating ring 1 and the boom 6, and between the stationary ring 2 and the spring seat 4. This mechanical seal structure effectively prevents water from being brought into the machine body during boom shaft rotation, achieving waterproofing in underwater environments. The engagement of the upper locking teeth 8 and lower locking teeth 9 allows the lower locking teeth 9 to be tightly fitted with the upper locking teeth 8 when the boom 6 is not rotating, thus limiting rotation. When the boom 6 rotates, the lower locking teeth 9 move downwards due to the action of the upper locking teeth 8, causing the upper locking teeth 8 and lower locking teeth 9 to separate, allowing the boom 6 to rotate normally. This achieves waterproofing of the boom, enhances waterproofing and precision, and enables the boom rotation to drive the rotation of the propellers and motor.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotatable amphibious unmanned aerial vehicle (UAV) arm structure, characterized in that: The assembly includes a boom (6), a duct body (7), and a sealing ring (5). The boom (6) is fixedly installed on the duct body (7). A moving ring (1) and a spring seat (4) are fixedly installed on the boom (6). A spring (3) is installed on the spring seat (4). A stationary ring (2) is installed on the spring (3). The stationary ring (2) is pressed against the moving ring (1) by the spring (3). The sealing ring (5) is installed between the moving ring (1) and the boom (6), and between the stationary ring (2) and the spring seat (4).

2. The rotatable amphibious unmanned aerial vehicle arm structure according to claim 1, characterized in that: The end of the boom (6) is provided with an upper cleat (8).

3. The rotatable amphibious unmanned aerial vehicle arm structure according to claim 1, characterized in that: The end of the boom (6) is also provided with a limit seat (11), and a limit spring (10) is provided on the limit seat (11). A lower locking tooth (9) is installed on the limit spring (10). The lower locking tooth (9) is pressed against the upper locking tooth (8) by the limit spring (10). The lower locking tooth (9) and the upper locking tooth (8) mesh with each other.

4. The rotatable amphibious unmanned aerial vehicle arm structure according to claim 1, characterized in that: The material of the moving ring (1) is silicon carbide.

5. The rotatable amphibious unmanned aerial vehicle arm structure according to claim 1, characterized in that: The stationary ring (2) is made of graphite.

6. The rotatable amphibious unmanned aerial vehicle arm structure according to claim 1, characterized in that: The sealing ring (5) is made of fluororubber.

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