A hatch mechanism dedicated to a drone
By coordinating the design of the sliding mechanism and the drive mechanism, the drone door can achieve curved movement on the inclined plane of the fuselage, which solves the problems of mismatched movement trajectory and debris entry in the existing technology, and improves the drone's flight performance and equipment protection capabilities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING AEROSPACE ROCKET ELECTRONIC TECH CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-05
AI Technical Summary
Existing drone door mechanisms cannot adapt to complex fuselage structures, resulting in mismatched motion trajectories, high flight drag, and debris entering the fuselage, affecting the drone's flight stability and equipment lifespan.
Design a hatch system that includes a sliding mechanism, a traction mechanism, and a drive mechanism. The hatch can achieve curved movement on the inclined plane of the fuselage through double track grooves on the slide rail and ball screw transmission, and is equipped with laser sensors and limit posts for precise control.
It enables the cabin door to move in a curved path on a complex fuselage structure, reducing flight drag and debris ingress, improving the flight efficiency and equipment protection of the UAV, and enhancing its stability and reliability in vibration environments.
Smart Images
Figure CN224324138U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of unmanned aerial vehicle (UAV) technology and relates to a cabin door mechanism specifically for UAVs. Background Technology
[0002] With the rapid development of drone technology, drones are increasingly widely used in aerial photography, surveying, agriculture, logistics, and rescue. To meet different mission requirements, drones typically need to carry equipment with various functions, collectively referred to as payloads. The way payloads are installed directly affects the drone's flight performance and equipment protection. Currently, payload installation methods are mainly divided into concealed and non-concealed types. Non-concealed installation exposes the payload directly to the outside of the drone. While this is simple to install, the payload experiences significant air resistance during flight, leading to reduced flight efficiency and increased energy consumption. Furthermore, when stored statically, dust, rainwater, and other impurities can easily adhere to the payload surface or enter the equipment's interior, causing mechanical wear or electrical malfunctions and shortening the equipment's lifespan. In contrast, concealed installation places the payload inside the fuselage, only extending through an extension port during mission execution. This effectively reduces flight drag and protects the payload from external environmental influences, making it more suitable for the design requirements of high-performance drones.
[0003] However, existing concealed installation methods still have certain shortcomings. Some drones have pre-drilled load extension holes on the bottom of the fuselage, but lack effective sealing mechanisms, allowing air to enter the fuselage through these holes, generating additional flight drag and affecting flight stability. Furthermore, open extension holes easily allow dust, foreign objects, and other contaminants to enter the fuselage, increasing the risk of equipment malfunction. To address these issues, some drones have designed simple door mechanisms to seal the extension holes, but existing door mechanisms typically only support linear motion and cannot adapt to complex fuselage structures. For example, in some drone designs, the load is installed only about 20mm from the fuselage surface and located above a sloping surface; the door needs to move along a curved trajectory to avoid the spherical load. Existing linear motion door mechanisms struggle to meet this requirement, easily interfering with the load or causing opening and closing difficulties due to mismatched motion trajectories, thus affecting mission efficiency.
[0004] To address the aforementioned issues, designing a door mechanism capable of adapting to the fuselage's sloping surface and achieving curved motion has become a pressing technical challenge. An ideal door mechanism should possess the following characteristics: first, it should completely seal the load extension opening, reducing flight drag and debris ingress; second, it should support curved motion to adapt to the geometry of the fuselage's sloping surface and the load; third, it should have a compact structure to suit installation environments with limited distance between the load and the fuselage; and fourth, it should have reliable drive and limit control to ensure precise and stable door opening and closing. Furthermore, the door mechanism needs a well-designed drive system to achieve smooth movement and a self-locking function to meet the stability requirements of the UAV in vibration or complex flight environments. In existing technologies, some door mechanisms employ simple hinge or linear guide designs, but these solutions cannot meet the requirements of curved motion and have poor adaptability in compact spaces, making it difficult to balance reliability and lightweight design. Utility Model Content
[0005] In view of this, the purpose of this utility model is to solve the above-mentioned problems and provide a door mechanism specifically for unmanned aerial vehicles (UAVs). Through the coordinated design of a sliding mechanism, a traction mechanism, and a drive mechanism, the door achieves curved movement on the inclined surface of the fuselage, ensuring stability and sealing during the opening and closing process. This effectively solves problems such as mismatched door movement trajectories, high resistance, and the entry of foreign objects in existing technologies, providing an efficient and reliable solution for the design of concealed payload UAVs.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A door mechanism for unmanned aerial vehicles (UAVs) includes a door, a sliding mechanism, a traction mechanism, and a drive mechanism. The sliding mechanism includes slide rails symmetrically arranged on both sides of the UAV's payload extension hole. The slide rails are fixed to the bottom of the UAV fuselage and have two track grooves, each with a roller slidingly mounted therein. Two sliding seats are provided on each side of the door, spaced back to back. Each sliding seat is rotatably connected to a roller in the track groove, allowing the door to slide smoothly against the slide rails. The drive mechanism is fixed to the UAV fuselage and connected to the door via the traction mechanism. Driving the door forward closes the door, while driving it backward opens it.
[0008] The two track grooves on the slide rail are distributed vertically, and each track groove is composed of different multi-line segments. The different distribution shapes of the two track grooves make the front and rear movement trajectories of the hatch different, thereby realizing the curved movement of the hatch on the inclined surface of the UAV fuselage.
[0009] The hatch mechanism is installed on the fuselage ramp within 20mm of the load protrusion hole. The distribution shape of the double track grooves of the slide rail is adapted to the fuselage ramp and the spherical structure of the load, so that the hatch avoids the load during curved movement.
[0010] Furthermore, the traction mechanism includes a traction rod, a bushing, a connecting rod, and a drive rod; the traction rod is fixed to the hatch, and the drive rod is connected to the drive mechanism; one end of the connecting rod is rotatably connected to the drive rod, and the other end is rotatably connected to the traction rod through the bushing, and is axially fixed by an elastic retaining ring.
[0011] Furthermore, the drive mechanism includes a belt drive mechanism, a lead screw drive mechanism, and a motor;
[0012] The screw drive mechanism includes a ball screw, a drive block, a screw fixing seat, and a support side support seat. The ball screw is rotatably connected to the screw fixing seat via the support side support seat. The screw fixing seat is fixed inside the machine body, and two linear guide rails are provided on both sides of the screw fixing seat. The drive block is threaded onto the ball screw, and its two sides are slidably fitted onto the linear guide rails and slide along the linear guide rails. The drive block is connected to the traction mechanism. The motor is driven by the ball screw through a belt drive mechanism, driving the ball screw to rotate, thereby moving the hatch through the drive block and the traction mechanism.
[0013] Furthermore, a brake is provided at one end of the ball screw to achieve braking and self-locking after the door moves.
[0014] Furthermore, the lead screw fixing seat is also equipped with a limiting post and a laser sensor. The limiting post is used to mechanically limit the drive block, and the laser sensor is used to obtain the real-time position of the drive block to provide feedback on the real-time position of the hatch.
[0015] Furthermore, the belt drive mechanism includes a synchronous pulley, a synchronous belt, and a tensioning mechanism. The motor is connected to the ball screw drive through the synchronous pulley and the synchronous belt. The tensioning mechanism is located on one side of the synchronous belt to prevent the synchronous belt from loosening during the vibration of the UAV.
[0016] Furthermore, a proximity switch is provided at the end of the track groove on the slide rail. The proximity switch is used to sense the sliding seat on the hatch to detect whether the hatch is in the correct position.
[0017] Furthermore, a plunger is provided on one side of the sliding seat, and the plunger is located between the sliding seat and the slide rail to control the gap between the hatch and the slide rail and prevent the hatch from shifting when it moves.
[0018] The beneficial effects of this utility model are as follows:
[0019] This utility model provides a door mechanism specifically for unmanned aerial vehicles (UAVs). Through the coordinated design of a sliding mechanism, a traction mechanism, and a drive mechanism, it addresses the need for sealing the payload extension hole of UAVs with concealed payloads. It achieves curved movement of the door on the inclined surface of the fuselage and precise opening and closing control, significantly improving upon the shortcomings of existing technologies and offering the following advantages:
[0020] 1. Achieve curved motion and adapt to complex fuselage structures.
[0021] This invention utilizes two vertically distributed track grooves on a slide rail, employing an arc-shaped trajectory design composed of different multi-segment lines, enabling the hatch to move along the inclined surface of the fuselage in a curved manner. Compared to existing hatch mechanisms that only support linear motion, this mechanism effectively adapts to the geometry of the UAV's inclined fuselage and spherical loads, avoiding interference between the hatch and the load. Particularly suitable for compact installation environments where the distance between the load and the fuselage surface is only about 20mm, the dual-track groove design ensures precise and stable hatch movement, significantly improving the adaptability and reliability of the hatch mechanism in complex fuselage structures, and providing crucial support for the concealed load design of high-performance UAVs.
[0022] 2. Reduces flight drag and debris ingress, improving flight performance and equipment protection.
[0023] This invention's hatch mechanism can completely seal the load extension port at the bottom of the fuselage. When the load is hidden inside the fuselage, the hatch remains closed, effectively preventing air from entering the fuselage through the extension port. This significantly reduces air resistance during flight, thereby improving the drone's flight efficiency and endurance. Compared to existing open or partially closed extension port designs, this mechanism, through its tight seal, prevents dust, rainwater, and other impurities from entering the fuselage, reducing wear and tear and the risk of malfunction for the load and internal equipment, extending equipment lifespan. It is particularly suitable for drone missions in harsh environments.
[0024] 3. Reduce friction and wind resistance, and improve motion stability.
[0025] This invention employs a ball screw as the core component of the screw drive mechanism. Through the meshing of the balls with the drive block, friction during the drive process is significantly reduced, minimizing energy loss caused by wind resistance and mechanical friction. Compared to traditional linear guide or hinged door mechanisms, the ball screw combined with a linear guide design makes the drive block's movement smoother and the door's opening and closing action more fluid. Furthermore, the plunger design in the sliding mechanism effectively controls the gap between the sliding seat and the slide rail, preventing the door from shifting during curved movement, further improving the stability and reliability of the mechanism's operation.
[0026] 4. Precise position control and limit protection
[0027] This invention achieves precise control and safety protection of the hatch movement through the coordinated operation of a laser sensor, proximity switch, and limit post. The laser sensor provides real-time feedback on the position of the drive block, thereby accurately monitoring the hatch's movement status and ensuring the accuracy of the opening and closing actions. The proximity switch detects whether the hatch has reached the open / closed position, preventing insufficient movement or overtravel. The limit post provides a mechanical limit function to prevent the hatch from exceeding its designed travel range due to program errors or other abnormalities. This multi-layered control and protection mechanism significantly improves the system's reliability and safety compared to existing hatch mechanisms with single limit or no feedback design, making it particularly suitable for the needs of high-precision mission UAVs.
[0028] 5. Enhance stability under vibration environments
[0029] This invention incorporates a tensioning mechanism in its belt drive system. An elastic element maintains the tension of the synchronous belt, effectively preventing transmission failure due to belt loosening during vibration or high-speed flight of the UAV. The connection design between the brake and the ball screw enables a self-locking function after the door movement stops, preventing accidental door movement caused by vibration or external forces. Compared to existing door mechanisms lacking self-locking or tensioning designs, this invention significantly improves the stability and durability of the mechanism in complex flight environments, ensuring the door maintains a reliable opening and closing state under various operating conditions.
[0030] 6. Compact structure, suitable for lightweight design
[0031] This invention's door mechanism achieves a compact design within a limited space by optimizing the layout of the sliding mechanism, traction mechanism, and drive mechanism, making it particularly suitable for installation environments where the distance between the load and the fuselage is only 20mm. All components (such as slide rails, ball screws, and drive blocks) are fixed inside the fuselage, resulting in a compact and lightweight structure that meets the requirements of lightweight UAV design. Compared to existing door mechanisms that are larger or more complex, this invention effectively controls weight and space occupation while ensuring functionality, providing support for optimizing the overall performance of the UAV.
[0032] In summary, this invention overcomes the problems of mismatched door movement trajectories, high flight drag, debris ingress, and insufficient stability in existing technologies through innovative double-track slide rails, ball screw transmission, precise position control, and stable drive design. It significantly improves the flight performance, equipment protection capabilities, and mission reliability of concealed payload UAVs. This door mechanism is compact, operates smoothly, and controls precisely, making it suitable for various high-performance UAVs, especially in scenarios requiring frequent payload use such as aerial photography, surveying, and rescue, demonstrating significant practical value and promising prospects for widespread adoption.
[0033] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description
[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:
[0035] Figure 1 This is a schematic diagram of the cabin door mechanism specifically designed for unmanned aerial vehicles (UAVs) in this utility model.
[0036] Figure 2 This is a schematic diagram of the drive mechanism for the door mechanism specifically designed for unmanned aerial vehicles (UAVs) in this utility model.
[0037] Figure 3 This is a partial schematic diagram of the hatch.
[0038] Figure 4 This is a schematic diagram of the slide rail and slide rail groove.
[0039] Figure 5 This is a schematic diagram of pulley installation.
[0040] Figure 6 This is a schematic diagram of the brake installation.
[0041] Figure 7 This is a schematic diagram of the installation of the drone-specific door mechanism of this utility model inside the drone.
[0042] Reference numerals: 1-Slide rail; 2-Hatch door; 3-Traction rod; 4-Shaft sleeve; 5-Connecting rod; 6-Drive rod; 7-Ball screw; 8-Screw fixing seat; 9-Drive block; 10-Linear guide rail; 11-Synchronous pulley; 12-Synchronous belt; 13-Tensioning mechanism; 14-Motor; 15-Proximity switch; 16-Limit pin; 17-Laser sensor; 18-Sliding seat; 19-Roller; 20-Plunger; 21-Key; 22-Set screw; 23-Support side support seat; 24-Brake. Detailed Implementation
[0043] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0044] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0045] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0046] Please see Figures 1-7 This is a door mechanism specifically designed for unmanned aerial vehicles (UAVs). Installed on the bottom of the UAV fuselage, it conceals the payload extension opening, meeting the design requirements of UAVs with concealed payloads. It is particularly suitable for compact spaces with a payload approximately 20mm from the fuselage and for sloping fuselage structures. The door mechanism comprises a door 2, a sliding mechanism, a traction mechanism, and a drive mechanism. Through the coordinated operation of these mechanisms, the door achieves curved movement on the sloping fuselage surface and precise opening and closing control.
[0047] The sliding mechanism, used to achieve the curved movement of the hatch, includes slide rails 1 symmetrically arranged on both sides of the load extension hole. The slide rails 1 are bolted to the bottom of the UAV fuselage. Each slide rail 1 has two vertically distributed track grooves, composed of different line segments forming an arc-shaped trajectory to adapt to the geometry of the fuselage's inclined surface and spherical load. Two sliding seats 18, spaced apart front to back, are located on each side of the hatch 2. Each sliding seat 18 is rotatably connected to a track groove via rollers 19, which slide within the track groove, creating a sliding fit between the hatch 2 and the slide rail 1. A plunger 20 is located on one side of each sliding seat 18. The plunger 20 contacts the inner wall of the slide rail 1 through elastic force, controlling the gap between the hatch 2 and the slide rail 1 to prevent the hatch from shifting during curved movement. A proximity switch 15 is located at the end of the track groove on the slide rail 1 to sense the sliding seat 18 and detect whether the hatch 2 has reached the open / closed position.
[0048] The traction mechanism converts the linear motion of the drive mechanism into the curved motion of the hatch, and includes a traction rod 3, a bushing 4, a connecting rod 5, and a drive rod 6. The traction rod 3 is bolted to the middle of the hatch 2. One end of the connecting rod 5 is rotatably connected to the drive rod 6 via a rotating shaft, and the other end is rotatably connected to the traction rod 3 via the bushing 4, and is axially fixed by an elastic retaining ring to ensure connection stability. The drive rod 6 is fixedly connected to the drive block 9 of the drive mechanism. Through the linear motion of the drive rod 6 and the rotation of the connecting rod 5, the hatch 2 is driven to achieve curved motion along the arc-shaped track groove of the slide rail 1.
[0049] The drive mechanism provides power for the movement of the hatch and includes a belt drive mechanism, a screw drive mechanism, and a motor 14.
[0050] The screw drive mechanism includes a ball screw 7, a drive block 9, a screw fixing seat 8, a support side support 23, and a brake 24. The ball screw 7 is rotatably connected to the screw fixing seat 8 via the support side support 23. The screw fixing seat 8 is bolted to the inside of the machine body, and has a linear guide rail 10 on each side. The drive block 9 is threaded onto the ball screw 7, and its two sides are slidably fitted onto the linear guide rails 10 and slide along the linear guide rails 10. The drive block 9 is bolted to the drive rod 6 of the traction mechanism. A brake 24 is provided at one end of the ball screw 7, which uses friction to brake and self-lock the hatch after it moves. A laser sensor 17 and a limit post 16 are provided on the screw fixing seat 8. The laser sensor 17 is fixed next to the linear guide rail 10 to detect the displacement of the drive block 9 in real time, and then provide feedback on the real-time position of the hatch 2. The limit post 16 is fixed at both ends of the linear guide rail 10 to mechanically limit the drive block 9 and prevent the hatch 2 from exceeding its designed stroke.
[0051] The belt drive mechanism includes a synchronous pulley 11, a synchronous belt 12, a tensioning mechanism 13, a key 21, and a set screw 22. The motor 14 is fixed inside the fuselage, and its output shaft is fixedly connected to one synchronous pulley 11 via the key 21 and set screw 22. The ball screw 7 is fixedly connected to another synchronous pulley 11 via another set of keys 21 and set screws 22. The synchronous belt 12 connects the two synchronous pulleys 11, enabling transmission between the motor 14 and the ball screw 7. The tensioning mechanism 13 is located on one side of the synchronous belt 12 and maintains the tension of the synchronous belt 12 through an elastic element, preventing loosening due to drone vibration.
[0052] like Figure 7 As shown, in this example, the hatch mechanism is installed on the fuselage ramp within 20mm of the load extension hole. The double-track groove design of the slide rail 1 adapts to the geometry of the fuselage ramp and the spherical load, ensuring that the hatch 2 avoids the load during curved movement. When the load is hidden inside the fuselage, the hatch 2 remains closed, sealing the load extension hole. During the task, the motor 14 starts, driving the ball screw 7 to rotate via the synchronous pulley 11, synchronous belt 12, and tensioning mechanism 13. The ball screw 7 drives the drive block 9 to slide along the linear guide rail 10. The drive block 9 drives the traction rod 3 via the drive rod 6, connecting rod 5, and bushing 4, causing the hatch 2 to move backward along the arc-shaped track groove of the slide rail 1, opening the load extension hole and allowing the load to extend. After the task is completed, the motor 14 rotates in the opposite direction, driving the hatch 2 to move forward and close the extension hole. Laser sensor 17 monitors the position of drive block 9 in real time, proximity switch 15 detects the opening and closing status of hatch 2, limit post 16 prevents overtravel, and brake 24 self-locks after hatch stops to ensure stability.
[0053] This embodiment achieves curved movement of the hatch 2 within a compact space (approximately 20mm) through the double-track arc design of the slide rail 1 and the low-friction transmission of the ball screw 7, avoiding interference with spherical loads. The laser sensor 17, proximity switch 15, and limit post 16 ensure precise control, while the brake 24 and tensioning mechanism 13 improve stability under vibration. The key 21 and set screw 22 ensure a secure connection of the transmission components. This mechanism is compact, lightweight, and well-sealed, significantly reducing flight drag and the risk of debris ingress, making it suitable for concealed payload designs in high-performance UAVs used for aerial photography, surveying, and rescue.
[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A door mechanism specifically designed for unmanned aerial vehicles (UAVs), characterized in that: The device includes a hatch, a sliding mechanism, a traction mechanism, and a drive mechanism. The sliding mechanism includes slide rails symmetrically arranged on both sides of the drone's payload extension hole. The slide rails are fixed to the bottom of the drone's fuselage and have two track grooves, each with a roller slidingly mounted therein. The hatch has two sliding seats on each side, spaced back to back. Each sliding seat is rotatably connected to a roller in the track groove, allowing the hatch to slide smoothly with the slide rails. The drive mechanism is fixed to the drone's fuselage and connected to the hatch via the traction mechanism. Driving the hatch forward closes it, while driving it backward opens it. The two track grooves on the slide rail are distributed vertically, and each track groove is composed of different multi-line segments. The different distribution shapes of the two track grooves make the front and rear movement trajectories of the hatch different, thereby realizing the curved movement of the hatch on the inclined surface of the UAV fuselage.
2. The drone-specific door mechanism according to claim 1, characterized in that: The traction mechanism includes a traction rod, a bushing, a connecting rod, and a drive rod; the traction rod is fixed to the hatch, and the drive rod is connected to the drive mechanism; one end of the connecting rod is rotatably connected to the drive rod, and the other end is rotatably connected to the traction rod through the bushing, and is axially fixed by an elastic retaining ring.
3. The drone-specific door mechanism according to claim 1, characterized in that: The drive mechanism includes a belt drive mechanism, a lead screw drive mechanism, and a motor; The screw drive mechanism includes a ball screw, a drive block, a screw fixing seat, and a support side support seat. The ball screw is rotatably connected to the screw fixing seat via the support side support seat. The screw fixing seat is fixed inside the machine body, and two linear guide rails are provided on both sides of the screw fixing seat. The drive block is threaded onto the ball screw, and its two sides are slidably fitted onto the linear guide rails and slide along the linear guide rails. The drive block is connected to the traction mechanism. The motor is driven by the ball screw through a belt drive mechanism, driving the ball screw to rotate, thereby moving the hatch through the drive block and the traction mechanism.
4. The drone-specific door mechanism according to claim 3, characterized in that: One end of the ball screw is equipped with a brake, which is used to brake and self-lock after the door moves.
5. The drone-specific door mechanism according to claim 3, characterized in that: The lead screw fixing seat is also equipped with a limiting post and a laser sensor. The limiting post is used to mechanically limit the drive block, and the laser sensor is used to obtain the real-time position of the drive block to provide feedback on the real-time position of the hatch.
6. The drone-specific door mechanism according to claim 3, characterized in that: The belt drive mechanism includes a synchronous pulley, a synchronous belt, and a tensioning mechanism. The motor is connected to the ball screw drive through the synchronous pulley and the synchronous belt. The tensioning mechanism is located on one side of the synchronous belt to prevent the synchronous belt from loosening during the vibration of the UAV.
7. The drone-specific door mechanism according to claim 1, characterized in that: A proximity switch is provided at the end of the track groove on the slide rail. The proximity switch is used to sense the sliding seat on the hatch to detect whether the hatch is open or closed.
8. The drone-specific door mechanism according to claim 1, characterized in that: A plunger is provided on one side of the sliding seat. The plunger is located between the sliding seat and the slide rail and is used to control the gap between the hatch and the slide rail to prevent the hatch from shifting when it moves.