An unmanned aerial vehicle and a water landing recovery device thereof

Abstract

This invention relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a UAV and its water recovery device. It includes a fuselage, a mounting plate, a control box, and two positioning devices. The two positioning devices are respectively installed on the outside of two landing gears. Each positioning device includes a mounting plate fixedly connected to the top of the mounting plate. A storage box is fixedly installed on one side of the mounting plate. A slider is slidably connected inside the storage box. A locking block is fixedly connected to one side of the slider. The locking block slides in cooperation with the storage box and the mounting plate. The locking block is located on the top of the landing gear. By employing a structure combining pneumatic positioning and locking, universal ball joint adaptive adjustment, and centralized air source linkage drive, the UAV fixing platform can achieve adaptive adjustment of the UAV's fixing and deployment / retraction attitude on mobile carriers such as patrol boats. The pneumatically driven locking block quickly limits the movement of the UAV landing gear.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and more specifically, to a UAV and its water recovery device. Background Technology

[0002] A drone is an unmanned, self-powered aircraft that can fly via remote control or autonomous programs. Drones can be divided into military and civilian applications. In the civilian sector, drones combined with industry applications represent the real necessity of drones. Applications include aerial photography, agriculture, plant protection, miniature selfies, express delivery, disaster relief, wildlife observation, infectious disease monitoring, surveying, news reporting, power line inspection, and film and television production.

[0003] Based on existing technology, with the widespread application of drone technology in maritime fields such as maritime law enforcement, marine inspection and search and rescue, the demand for autonomous take-off and landing of drones on mobile platforms such as patrol boats and law enforcement vessels is becoming increasingly urgent. Patrol boats are constantly subject to rolling and pitching due to the influence of wind and waves during navigation. Traditional take-off methods require the platform to be stationary or are only applicable to stationary land platforms. Since they cannot meet the needs of dynamic operations at sea, when drones take off from the deck of a ship, if the tilting and swaying of the hull are not taken into account, they are prone to capsizing or colliding with deck facilities, resulting in take-off failure or even crashing into the sea. Summary of the Invention

[0004] This invention provides a drone and its water recovery device. By employing a structure combining pneumatic positioning and locking, universal ball joint adaptive adjustment, and centralized air source linkage drive, the drone fixing platform can achieve adaptive adjustment of the drone's fixing and deployment attitude on mobile carriers such as patrol boats. The pneumatically driven locking block quickly limits the drone's landing gear. Combined with the guiding structure and pressure sensor monitoring, the positioning capability and fixing reliability are improved, thereby solving the problem mentioned in the background art: due to the inability to meet the dynamic operation requirements at sea, when the drone takes off from the deck of a ship, if the tilt and sway of the hull are not taken into account, it is easy to capsize or collide with deck facilities, resulting in takeoff failure or even crashing into the sea.

[0005] To achieve the above objectives, a drone and its water recovery device include a body, a fixed plate, a control box, and two positioning devices. Four propellers are fixedly mounted on the outside of the body, and two landing gears are fixedly connected to the bottom of the body. The bottom of the control box is fixedly connected to the top of the body. A positioning module, an inertial module, a combined navigation module, and a wireless module are fixedly mounted inside the control box. The two positioning devices are respectively located outside the two landing gears. Each positioning device includes a fixed plate fixedly connected to the top of the fixed plate. A storage box is fixedly mounted on one side of the fixed plate. A slider is slidably connected inside the storage box, and a locking block is fixedly connected to one side of the slider. The locking block slides in cooperation with the storage box and the fixed plate, and the locking block is located on the top of the landing gear.

[0006] The bottom of the fixed plate is provided with an adjustment device, which includes a base plate located directly below the fixed plate, a ball seat fixedly connected to the top of the base plate, and a rotating cylinder fixedly connected to the bottom of the fixed plate, with the top of the ball seat embedded inside the rotating cylinder.

[0007] In the above technical solution, two springs are fixedly connected to one side of the slider and the inside of the storage box. Two pressure sensors are fixedly installed inside the fixed plate, and the pressure sensors are located directly below the landing gear. Two side plates are fixedly connected to the top of the fixed plate. A guide plate is fixedly connected to one side of the fixed plate, and the guide plate is located on one side of the landing gear. A main air pipe is fixedly connected to the end of the storage box away from the fixed plate. When air is injected into the main air pipe, the main air pipe will guide the gas into the storage box, causing the gas to compress the slider and make the slider drive the locking block to slide to the top of the landing gear, thereby restricting the position of the landing gear.

[0008] Secondly, four placement blocks are fixedly connected to the top of the base plate, and a sleeve is fixedly connected to the top of each placement block. An air bladder is embedded inside the sleeve, and a slide is slidably connected inside the sleeve. The slide is fitted over the air bladder, and a ball head is fixedly connected to the top of the slide near the bottom of the fixed plate. When the air bladder receives compressed gas, the air bladder is expanded by the compressed gas and pushes the slide and ball head upward. The ball head moves against the fixed plate to drive the fixed plate to rotate the rotating cylinder on the ball seat surface.

[0009] Furthermore, based on the above, the bottom of the airbag is fixedly connected to an auxiliary air tube, the inside of the sleeve is provided with multiple sliding grooves, the slide is slidably engaged with the sleeve through multiple sliding grooves, the inside of the placement block is threadedly connected to a positioning plate, the bottom of the positioning plate is fixedly connected to two push blocks, and the auxiliary air tube is embedded inside the positioning plate.

[0010] Meanwhile, a drive assembly is provided on the outside of the main air pipe and the auxiliary air pipe. The drive assembly includes a delivery pipe located directly above the base plate. Solenoid valves are fixedly installed on the outside of the two main air pipes and the multiple auxiliary air pipes. A main pipe is fixedly connected to the outside of the solenoid valves on one side of the two main air pipes and the delivery pipe. A secondary pipe is fixedly connected to the outside of the solenoid valves on one side of the multiple auxiliary air pipes and the delivery pipe. A high-pressure air pump is provided on one side of the delivery pipe to provide compressed gas to the main air pipe and the auxiliary air pipe. When the wireless module receives the landing signal, the high-pressure air pump starts and supplies air to the delivery pipe, so that the main air pipe guides the gas into the storage box to drive the locking block to lock the landing gear.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The UAV and its water recovery device employ a structure combining pneumatic positioning and locking, universal ball joint adaptive adjustment, and centralized air source linkage drive. This allows the UAV fixing platform to achieve adaptive adjustment of the UAV's fixation and deployment / retraction attitude on mobile carriers such as patrol boats. Pneumatically driven blocks quickly limit the UAV's landing gear, and the guiding structure and pressure sensor monitoring enhance positioning capability and fixation reliability. The bottom ball joint, together with multiple airbags, forms a flexible adjustment mechanism that can follow the ship's roll and pitch attitude in real time, keeping the platform at the same tilt angle as the ship and providing the UAV with takeoff conditions that match its attitude. The airbags serve both attitude drive and shock absorption functions. Furthermore, the single air source with multiple air supply channels and the absence of complex transmission components enable it to adapt to the maritime operating environment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is an enlarged structural diagram of point A in this invention;

[0015] Figure 3 This is a cross-sectional view of the storage box in this invention.

[0016] Figure 4 This is a side view of the structure of the machine body in this invention;

[0017] Figure 5 This is a side view of the adjustment device in this invention.

[0018] Figure 6 This is a bottom view of the bottom plate structure in this invention;

[0019] Figure 7 This is a bottom view of the auxiliary trachea in this invention;

[0020] Figure 8This is a three-dimensional structural diagram of the connecting device and the storage device in this invention;

[0021] Figure 9 This is a side view of the storage device in this invention.

[0022] Figure 10 This is an enlarged structural diagram of point B in the present invention.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Airframe; 2. Propeller blades; 3. Landing gear; 4. Positioning device; 41. Fixing plate; 42. Storage box; 43. Slider; 44. Locking block; 45. Spring; 46. Pressure sensor; 47. Side plate; 48. Guide plate; 49. Main air pipe; 5. Fixing disc; 6. Drive assembly; 61. Delivery pipe; 62. Main pipe; 63. Secondary pipe; 64. Solenoid valve; 7. Adjustment device; 701. Base plate; 702. Placement block; 703. Sleeve; 704. Airbag; 705. Carriage; 706. Ball joint; 7 7. Auxiliary air pipe; 708. Positioning plate; 709. Push block; 710. Ball seat; 711. Rotary cylinder; 8. Control box; 9. Positioning module; 10. Inertial module; 11. Combined navigation module; 12. Wireless module; 13. Connecting device; 131. Fixing frame; 132. Control rod; 133. Extension rod; 134. Connecting rod; 14. Storage device; 141. Half ring; 142. Rotating ring; 143. Connecting ring; 144. Retaining ring; 145. Pad; 146. Magnetic strip; 15. Buoyancy chamber. Detailed Implementation

[0025] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] Because it cannot meet the needs of dynamic operations at sea, when drones take off from the deck of a ship, if the tilting and swaying of the ship are not taken into account, they are prone to capsizing or colliding with deck facilities, resulting in takeoff failure or even crashing into the sea.

[0027] Therefore, in view of the above-mentioned problems, the present invention provides a drone and its water recovery device, Embodiment 1; Reference Figure 1 - Figure 3As shown, it includes a body 1, a fixed plate 5, a control box 8, and two positioning devices 4. Four propellers 2 are fixedly installed on the outside of the body 1. Two landing gears 3 are fixedly connected to the bottom of the body 1. The bottom of the control box 8 is fixedly connected to the top of the body 1. The control box 8 is fixedly installed with a positioning module 9, an inertial module 10, a combined navigation module 11, and a wireless module 12. It can acquire the position, attitude, and motion status information of the body 1 in real time, provide data support for the positioning devices 4, and improve the overall control accuracy and response speed.

[0028] Two positioning devices 4 are respectively installed on the outside of the two landing gears 3. The positioning device 4 includes a fixed plate 41 fixedly connected to the top of the fixed plate 5. A storage box 42 is fixedly installed on one side of the fixed plate 41. A slider 43 is slidably connected inside the storage box 42. A locking block 44 is fixedly connected to one side of the slider 43. The locking block 44 slides in cooperation with the storage box 42 and the fixed plate 41. The locking block 44 is located on the top of the landing gear 3 and can limit and fix the landing gear 3 to prevent the UAV from shifting, shaking or overturning under the conditions of hull swaying and vibration. At the same time, it improves the structural stability during parking and take-off. The whole device can achieve positioning in a limited deck space and is suitable for the complex operating conditions of maritime mobile platforms.

[0029] refer to Figure 3 As shown, two springs 45 are fixedly connected to one side of the slider 43 and the inside of the storage box 42. After the pressure is released, the slider 43 and the locking block 44 will automatically reset. Two pressure sensors 46 are fixedly installed inside the fixing plate 41. The pressure sensors 46 are located directly below the landing gear 3 and can monitor the contact status of the landing gear 3 in real time, which facilitates the quick locking of the landing gear 3. Two side plates 47 are fixedly connected to the top of the fixing plate 41, and a guide plate 48 is fixedly connected to one side of the fixing plate 41. The guide plate 48 is located on one side of the landing gear 3.

[0030] The side plate 47 and the guide plate 48 form a guiding and limiting structure, which guides the landing gear 3 to quickly center and position during the parking or landing of the UAV. The end of the storage box 42 away from the fixed plate 41 is fixedly connected to the main air pipe 49. When air is filled into the main air pipe 49, the gas enters the storage box 42 and pushes the slider 43, so that the slider 43 drives the locking block 44 to slide smoothly to the top of the landing gear 3 to complete the limiting and fixing.

[0031] refer to Figure 5 - Figure 7As shown, the bottom of the fixed plate 5 is equipped with an adjustment device 7. The adjustment device 7 includes a base plate 701 located directly below the fixed plate 5. A ball seat 710 is fixedly connected to the top of the base plate 701, and a rotating cylinder 711 is fixedly connected to the bottom of the fixed plate 5. The top of the ball seat 710 is embedded inside the rotating cylinder 711. Through the cooperation between the ball seat 710 and the rotating cylinder 711, the fixed plate 5 can freely and adaptively deflect with the hull's roll and pitch, realizing real-time synchronous matching between the platform attitude and the hull attitude. Four placement blocks 702 are fixedly connected to the top of the base plate 701, and a sleeve 703 is fixedly connected to the top of the placement blocks 702. An airbag 704 is embedded inside the sleeve 703. By inflating and deflating the airbag, the fixed plate 5 can be flexibly driven to complete attitude fine-tuning. It has the dual functions of angle adjustment and buffering and vibration reduction, isolating hull vibration and take-off and landing impact, and protecting the stable operation of the UAV and airborne equipment.

[0032] refer to Figure 5 and Figure 7 As shown, a slide 705 is slidably connected inside the sleeve 703. The slide 705 is fitted over the outside of the airbag 704. A ball head 706 is fixedly connected to the top of the slide 705 near the bottom of the fixed plate 5. The slide 705 and the ball head 706 cooperate to convert the flexible thrust of the airbag 704 into a stable rigid support, preventing the airbag 704 from being directly subjected to force and swaying. When the airbag 704 receives compressed gas, the airbag 704 is expanded by the compressed gas and pushes the slide 705 and the ball head 706 to slide upward. The ball head 706 moves against the fixed plate 5 to drive the fixed plate 5 to drive the rotating cylinder 711 to rotate on the surface of the ball seat 710.

[0033] The bottom of the airbag 704 is fixedly connected to an auxiliary air tube 707, which can stably deliver compressed gas. The sleeve 703 has multiple sliding grooves inside. The slide 705 slides in cooperation with the sleeve 703 through multiple sliding grooves. The sliding grooves limit the slide 705 to prevent jamming or displacement during the lifting and lowering of the slide 705. The placement block 702 is internally threaded with a positioning plate 708. The bottom of the positioning plate 708 is fixedly connected to two push blocks 709. The auxiliary air tube 707 is embedded inside the positioning plate 708. The positioning plate 708 and the push blocks 709 facilitate the assembly and disassembly of the airbag 704.

[0034] refer to Figure 4 As shown, a drive assembly 6 is provided on the outside of the main air pipe 49 and the auxiliary air pipe 707. The drive assembly 6 includes a delivery pipe 61 located directly above the bottom plate 701. Solenoid valves 64 are fixedly installed on the outside of the two main air pipes 49 and the multiple auxiliary air pipes 707. A main pipe 62 is fixedly connected to the outside of the solenoid valve 64 and the delivery pipe 61 on one side of the two main air pipes 49. A secondary pipe 63 is fixedly connected to the outside of the solenoid valve 64 and the delivery pipe 61 on one side of the multiple auxiliary air pipes 707. A single air source is used for centralized air supply, which reduces the number of pipes and components and improves the installation adaptability in the shipboard environment.

[0035] A high-pressure air pump is provided on one side of the delivery pipe 61 to provide compressed gas to the main air pipe 49 and the auxiliary air pipe 707, which can provide stable power for pneumatic locking and attitude adjustment of the airbag 704. When the wireless module 12 receives the landing signal, the high-pressure air pump starts and supplies air to the delivery pipe 61, so that the main air pipe 49 introduces the gas into the storage box 42 to drive the locking block 44 to lock the landing gear 3.

[0036] Working principle of the invention: During operation, the positioning module 9, inertial module 10, combined navigation module 11 and wireless module 12 in the control box 8 work together to collect the position, attitude and motion status information of the body 1 in real time, providing data support for the positioning, locking and attitude adjustment of the device.

[0037] When the drone lands or parks above the fixed plate 5, the side plate 47 at the top of the fixed plate 41 and the guide plate 48 form a guiding constraint, guiding the landing gear 3 to fall on the fixed plate 41. The bottom of the landing gear 3 contacts the pressure sensor 46, and the pressure sensor 46 provides real-time feedback of the contact signal, providing a trigger basis for the locking action.

[0038] After compressed gas is introduced into the main air pipe 49, the gas enters the storage box 42 and pushes the slider 43 to slide. The slider 43 drives the locking block 44 to extend and move to the top of the landing gear 3, thereby limiting and fixing the landing gear 3. After depressurization, the slider 43 and the locking block 44 automatically reset under the action of the spring 45, quickly releasing the constraint and meeting the takeoff preparation requirements.

[0039] The bottom of the fixed plate 5 is universally engaged with the ball seat 710 on the base plate 701 via the rotating cylinder 711. It can freely deflect with the hull's roll and pitch, keeping the platform attitude synchronized with the hull attitude in real time. When compressed gas is introduced into the auxiliary air pipe 707, the air bladder 704 inside the sleeve 703 expands and pushes the slide 705 to move upward along the slide groove. The ball head 706 at the top of the slide 705 drives the fixed plate 5 to rotate around the ball seat 710 in a rigid support manner, realizing the fine adjustment of the platform attitude. While providing driving force, the air bladder 704 also buffers the vibration and take-off and landing impact transmitted by the hull, protecting the stable operation of the airborne equipment.

[0040] The drive assembly 6 forms a centralized air supply circuit through a high-pressure air pump, a delivery pipe 61, a main pipe 62, and a secondary pipe 63. Each air route is independently controlled by a solenoid valve 64 to drive the locking mechanism and the attitude adjustment mechanism synchronously or separately according to work requirements.

[0041] Example 2; see below Figure 8 - Figure 10Based on Embodiment 1, the present invention provides a technical solution: a connecting device 13 is provided on the outside of the base plate 701. The connecting device 13 includes a fixing frame 131. One side of the fixing frame 131 is fixedly installed on the outside of the base plate 701. A control rod 132 is slidably connected inside the fixing frame 131 to realize height adjustment and adapt to the installation space and usage height requirements of different boat decks. An extension rod 133 is threadedly connected to the bottom end of the control rod 132. The extension rod 133 adopts a segmented threaded connection and the overall length can be flexibly adjusted according to the usage scenario. A connecting rod 134 is threadedly connected to the bottom end of the extension rod 133.

[0042] A storage device 14 is provided on one side of the connecting rod 134. The storage device 14 includes a semi-ring 141 fixedly connected to the outside of the connecting rod 134. Two rotating rings 142 are rotatably connected to the outside of the semi-ring 141. Two connecting rings 143 are fixedly connected to the end of the rotating ring 142 near the semi-ring 141. The two connecting rings 143 are embedded inside the semi-ring 141. When the semi-ring 141 approaches the drone, the drone body directly squeezes the connecting rings 143. The connecting rings 143 drive the rotating rings 142 to rotate inward, so that the two rotating rings 142 fit together. This allows the drone to enter the semi-ring 141 and complete the storage without the need for other driving devices to achieve automatic clamping.

[0043] A retaining ring 144 is fixedly connected to one side of each of the two connecting rings 143. The retaining ring 144 limits the rotation radius of the connecting ring 143. A pad 145 is fixedly connected inside the half ring 141. Magnetic strips 146 are fixedly connected to the ends of the two rotating rings 142 that are close to each other, and the two magnetic strips 146 attract each other magnetically. After the drone enters, the rotating ring 142 closes and locks, maintaining stable clamping under the swaying of the waves and the ship. Buoyancy chambers 15 are fixedly installed on the outside of the two landing gears 3, so that the drone can float on the water after it falls into the water.

[0044] The working principle of this invention is as follows: When using the entire water recovery device, the connecting rod 134 is inserted into the fixed frame 131, and then multiple extension rods 133 are installed on the connecting rod 134. The number of extension rods 133 is selected according to the height difference between the fixed frame 131 and the water surface. Finally, the control rod 132 is fixed on the topmost extension rod 133.

[0045] After the drone falls into the water, the buoyancy chamber 15 outside the landing gear 3 provides buoyancy, allowing the drone to float on the water surface, making it easier for the storage device 14 to be positioned and approached. The operator adjusts the length of the control lever 132, extension lever 133 and connecting lever 134, bringing the semi-ring 141 close to the drone. When the semi-ring 141 contacts the drone fuselage, the fuselage directly squeezes the connecting ring 143 at the end of the rotating ring 142. After being stressed, the connecting ring 143 drives the rotating ring 142 to rotate inward around the semi-ring 141, so that the two rotating rings 142 gradually come together.

[0046] During this process, the retaining ring 144 limits the connecting ring 143, restricting its rotation radius, preventing the rotating ring 142 from rotating excessively and affecting the storage effect, and ensuring that the drone can smoothly enter the interior of the semi-ring 141.

[0047] After the drone fully enters the semi-ring 141, the magnetic strips 146 at the ends of the two rotating rings 142 attract each other, realizing the automatic closing and locking of the rotating rings 142. The pad 145 inside the semi-ring 141 can support the drone and reduce the possibility of the drone falling off.

[0048] After the drone is fixed inside the semi-ring 141, pull the control lever 132 to move the extension rod 133, the connecting rod 134 and the semi-ring 141. After the semi-ring 141 moves to a suitable height, remove the drone and disassemble the control lever 132, the extension rod 133 and the connecting rod 134 for storage.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drone and its water recovery device, comprising a body (1), a fixed plate (5), a control box (8), and two positioning devices (4), wherein four propellers (2) are fixedly installed on the outside of the body (1), two landing gears (3) are fixedly connected to the bottom of the body (1), the bottom of the control box (8) is fixedly connected to the top of the body (1), and a positioning module (9), an inertial module (10), a combined navigation module (11), and a wireless module (12) are fixedly installed inside the control box (8), characterized in that: The two positioning devices (4) are respectively set outside the two landing gears (3). The positioning device (4) includes a fixed plate (41) fixedly connected to the top of the fixed plate (5). A storage box (42) is fixedly installed on one side of the fixed plate (41). A slider (43) is slidably connected inside the storage box (42). A locking block (44) is fixedly connected to one side of the slider (43). The locking block (44) slides in cooperation with the storage box (42) and the fixed plate (41). The locking block (44) is located on the top of the landing gear (3). The bottom of the fixed plate (5) is provided with an adjustment device (7). The adjustment device (7) includes a base plate (701) located directly below the fixed plate (5). A ball seat (710) is fixedly connected to the top of the base plate (701). A rotating cylinder (711) is fixedly connected to the bottom of the fixed plate (5). The top of the ball seat (710) is embedded inside the rotating cylinder (711).

2. The UAV and its water recovery device according to claim 1, characterized in that: Two springs (45) are fixedly connected to one side of the slider (43) and inside the storage box (42). Two pressure sensors (46) are fixedly installed inside the fixing plate (41). The pressure sensors (46) are located directly below the landing gear (3).

3. The UAV and its water recovery device according to claim 1, characterized in that: The top of the fixed plate (41) is fixedly connected to two side plates (47), and a guide plate (48) is fixedly connected to one side of the fixed plate (41). The guide plate (48) is located on one side of the landing gear (3).

4. The UAV and its water recovery device according to claim 1, characterized in that: The storage box (42) is fixedly connected to a main air pipe (49) at the end away from the fixed plate (41). When air is filled into the main air pipe (49), the main air pipe (49) will introduce the gas into the storage box (42), so that the gas squeezes the slider (43) and causes the slider (43) to drive the locking block (44) to slide to the top of the landing gear (3) to limit the position of the landing gear (3).

5. The UAV and its water recovery device according to claim 4, characterized in that: The top of the base plate (701) is fixedly connected to four placement blocks (702), and the top of the placement blocks (702) is fixedly connected to a sleeve (703). An airbag (704) is embedded inside the sleeve (703).

6. The UAV and its water recovery device according to claim 5, characterized in that: The sleeve (703) is slidably connected to a slide (705), which is fitted over the airbag (704). A ball head (706) is fixedly connected to the top of the slide (705) near the bottom of the fixed plate (5). When the airbag (704) receives compressed gas, the airbag (704) is expanded by the compressed gas and pushes the slide (705) and the ball head (706) to slide upward. The ball head (706) moves against the fixed plate (5) to drive the fixed plate (5) to drive the rotating cylinder (711) to rotate on the surface of the ball seat (710).

7. The UAV and its water recovery device according to claim 5, characterized in that: The bottom of the airbag (704) is fixedly connected to the auxiliary air tube (707), and the inside of the sleeve (703) is provided with multiple sliding grooves. The slide (705) slides and engages with the sleeve (703) through the multiple sliding grooves.

8. The UAV and its water recovery device according to claim 7, characterized in that: The placement block (702) is internally threaded with a positioning disc (708), and two push blocks (709) are fixedly connected to the bottom of the positioning disc (708). The auxiliary air pipe (707) is embedded inside the positioning disc (708).

9. The UAV and its water recovery device according to claim 7, characterized in that: The main air pipe (49) and the auxiliary air pipe (707) are provided with a drive assembly (6). The drive assembly (6) includes a delivery pipe (61) located directly above the base plate (701). Solenoid valves (64) are fixedly installed on the outside of the two main air pipes (49) and the multiple auxiliary air pipes (707). A main pipe (62) is fixedly connected to the outside of the solenoid valve (64) and the delivery pipe (61) on one side of the two main air pipes (49). A secondary pipe (63) is fixedly connected to the outside of the solenoid valve (64) and the delivery pipe (61) on one side of the multiple auxiliary air pipes (707).

10. The UAV and its water recovery device according to claim 9, characterized in that: A high-pressure air pump is provided on one side of the delivery pipe (61) to supply compressed gas to the main air pipe (49) and the auxiliary air pipe (707). When the wireless module (12) receives the landing signal, the high-pressure air pump starts and supplies air to the delivery pipe (61), so that the main air pipe (49) introduces the gas into the storage box (42) to drive the locking block (44) to lock the landing gear (3).

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