Unmanned aerial vehicle convenient for dismounting and replacing hydrogen storage tank of hydrogen fuel cell

Abstract

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle facilitating replacement of a hydrogen storage tank of a hydrogen fuel cell, the unmanned aerial vehicle comprises an unmanned aerial vehicle body and a cabin arranged in the unmanned aerial vehicle body, and the cabin is used for bearing the hydrogen storage tank and the fuel cell; a placing plate is arranged at the bottom of the cabin; a floating frame and two first clamping assemblies are arranged on the placing plate, and a cabin door is arranged on the cabin; a first clamping assembly is arranged at the top of the cabin, a second clamping assembly is arranged at the top of the cabin, through relative movement of the two first clamping assemblies, centered primary clamping of the hydrogen storage tank is achieved, then through linkage of the closing action of the cabin door and driving of the second clamping assembly, the hydrogen storage tank can be rapidly pressed and fixed for the second time after butt joint of the hydrogen storage tank and a fuel cell is completed, and the safety of the hydrogen storage tank is improved. A double-clamping protection structure is formed, the mounting stability of the hydrogen storage tank under various working conditions such as flight and landing of the unmanned aerial vehicle is enhanced, the problem of hydrogen storage tank displacement or butt joint loosening caused by jolting and shaking is effectively avoided, and the working continuity and safety of a hydrogen fuel cell system are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a UAV that facilitates the replacement of hydrogen storage tanks in hydrogen fuel cells. Background Technology

[0002] Drones have been widely used in various fields such as aerial photography, agricultural plant protection, express delivery, disaster relief, power line inspection, and film and television shooting, greatly expanding their application boundaries. With the development of environmental protection concepts and energy technologies, hydrogen fuel cells, due to their advantages such as high energy density, long endurance, and zero emissions, are gradually becoming the preferred power solution for large drones. As a core component of energy supply, the installation stability and ease of replacement of hydrogen storage tanks directly affect the operational efficiency and safety performance of drones. However, the existing hydrogen storage tank installation structures for hydrogen fuel cell drones mostly follow the battery fixing methods of traditional large drones, such as fixing the hydrogen storage tank to the drone body through locking strips and bolt connections. This has many problems. To meet hydrogen supply requirements, the hydrogen storage tank usually has a certain weight and volume. Traditional binding or bolt fixing methods require additional tools for installation and disassembly, which is cumbersome, time-consuming and labor-intensive. Especially in outdoor operation scenarios, it seriously affects the efficiency of rapid refueling. At the same time, this fixing method lacks a precise centering and positioning structure. After installation, the hydrogen storage tank is prone to displacement, which not only affects the docking accuracy with the fuel cell and leads to unstable hydrogen supply, but may also cause the hydrogen storage tank to loosen or even shift due to turbulence and vibration during drone flight or landing, posing a safety hazard of high-pressure hydrogen leakage. Summary of the Invention

[0003] To address the aforementioned issues, a drone is provided that facilitates the replacement of hydrogen storage tanks for hydrogen fuel cells. Through the relative movement of two first clamping components, the hydrogen storage tank is initially clamped and aligned. Then, through the closing action of the hatch and the driving linkage of the second clamping component, the hydrogen storage tank can be quickly and quickly secured again after docking with the fuel cell, forming a double-clamping protection structure. This enhances the installation stability of the hydrogen storage tank under various operating conditions such as drone flight and landing, effectively avoiding the problems of hydrogen storage tank displacement or loosening caused by bumps and shaking, and ensuring the continuity and safety of the hydrogen fuel cell system.

[0004] To address the problems of existing technologies, this invention provides a drone for conveniently replacing the hydrogen storage tank of a hydrogen fuel cell. The drone includes a main body and a cabin within the main body. The cabin carries the hydrogen storage tank of the hydrogen fuel cell, and a fuel cell capable of docking with the tank is located beside it within the cabin. A pull-out placement plate is located at the bottom of the cabin. A floating frame and two first clamping assemblies are elastically connected to the placement plate. The floating frame can slide relative to the placement plate along its height. The two first clamping assemblies are symmetrically arranged on both sides of the floating frame and are convexly connected to it. Movement of the floating frame causes the two first clamping assemblies to move closer together, providing initial clamping and centering of the hydrogen tank placed on the floating frame. A door is provided on the cabin. A second clamping assembly is located at the top of the cabin, capable of secondary compression of the hydrogen tank, and its movement is driven by the closing action of the door.

[0005] Preferably, both first clamping components are provided with inclined slide rails, and both ends of the floating frame are provided with sliding rods, which slide in cooperation with the slide rails.

[0006] Preferably, the second clamping assembly includes a mounting frame, a clamping plate, and two connecting rods. The mounting frame is fixedly connected to the top of the cabin, and the two connecting rods are hinged parallel to the mounting frame. The clamping plate is hinged to one end of the two connecting rods away from the mounting frame.

[0007] Preferably, the top of the cabin is provided with a fixed plate and a drive block that slides in the same direction as the placement plate. A drive rod is provided between the drive block and one of the connecting rods. The two ends of the drive rod are respectively hinged to the middle of the drive block and the connecting rod. The drive block is elastically connected to the fixed plate.

[0008] Preferably, the clamping plate near the hydrogen storage tank, the floating frame near the hydrogen storage tank, and the two first clamping components near the hydrogen storage tank are all provided with an arc-shaped structure that matches the outer periphery of the hydrogen storage tank.

[0009] Preferably, the hatch is fixedly connected to one end of the placement plate.

[0010] Preferably, the placement plate is also equipped with a sensor for detecting the height position of the floating frame.

[0011] Preferably, the hatch is locked to the cabin opening via a spring-loaded mechanism.

[0012] Preferably, the bottom of the cabin is provided with two horizontally extending tracks, and the placement plate is slidably mounted on the tracks.

[0013] Preferably, both the first clamping component and the second clamping component are provided with an anti-slip buffer layer.

[0014] The advantages of this invention compared to the prior art are:

[0015] 1. This invention achieves initial centering and clamping of the hydrogen storage tank through the relative movement of two first clamping components. Then, through the door closing action and the driving linkage of the second clamping component, the hydrogen storage tank quickly receives secondary clamping and fixation after docking with the fuel cell, forming a double-clamping protective structure. This enhances the installation stability of the hydrogen storage tank under various operating conditions such as drone flight and landing, effectively avoiding problems such as displacement or loosening of the hydrogen storage tank due to bumps and shaking, ensuring the continuity and safety of the hydrogen fuel cell system. Furthermore, once the placement plate is pushed into place, the hydrogen storage tank and fuel cell can be docked. Combined with the automatic centering and positioning of the first clamping components, the docking process is smooth and precise, requiring no additional adjustments.

[0016] 2. This invention simplifies the operation process by fixing the hatch to one end of the placement plate, compared to a separate hatch. The pull-out action of the placement plate and the opening / closing action of the hatch are integrated into one, eliminating the need for a separate hatch operation step. This improves the convenience and efficiency of hydrogen tank replacement, and is particularly suitable for the rapid outdoor refueling needs of drones. Furthermore, this fixed connection method creates an integrated structure between the hatch and the placement plate, matching the movement of the placement plate with the opening and closing of the hatch.

[0017] 3. This invention, by installing sensors on the placement plate to detect the height of the floating frame, can accurately reflect the placement status of the hydrogen storage tank, avoiding subsequent operations such as pushing the plate or closing the hatch if the hydrogen storage tank is not in place, thus preventing problems such as unstable clamping and docking deviation. The sensor's detection function eliminates the need for manual judgment of whether the hydrogen storage tank is in place, reducing human error. Especially in outdoor operating environments, it can quickly confirm operation nodes and improve replacement efficiency. In addition, the sensor continuously monitors the height of the floating frame, providing real-time feedback on the stability of the clamping status. If the floating frame shifts due to abnormal conditions during flight, the sensor can promptly report the abnormal signal, ensuring the safe operation of the hydrogen fuel cell system and improving the safety, reliability, and ease of operation of the solution. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a drone that facilitates the replacement of hydrogen storage tanks for hydrogen fuel cells.

[0019] Figure 2 This is a cross-sectional structural diagram of a drone that facilitates the replacement of hydrogen storage tanks for hydrogen fuel cells.

[0020] Figure 3 This is a three-dimensional cross-sectional diagram of a drone that facilitates the replacement of hydrogen storage tanks for hydrogen fuel cells.

[0021] Figure 4This is a three-dimensional structural diagram of the internal cabin of a drone that facilitates the replacement of hydrogen storage tanks for hydrogen fuel cells.

[0022] Figure 5 This is a front view of the interior of the cabin of a drone, which facilitates the replacement of hydrogen storage tanks for hydrogen fuel cells.

[0023] Figure 6 This is a three-dimensional structural diagram of a drone that facilitates the replacement of hydrogen storage tanks for hydrogen fuel cells, including a placement plate, a first clamping assembly, and a floating frame.

[0024] Figure 7 This is a three-dimensional structural diagram of a drone that facilitates the replacement of hydrogen storage tanks for hydrogen fuel cells, including a placement plate and a floating frame.

[0025] Figure 8 This is a 3D structural diagram illustrating the process of replacing the battery in a drone that facilitates the replacement of the hydrogen storage tank for a hydrogen fuel cell.

[0026] Figure 9 yes Figure 8 Enlarged view of point A in the middle.

[0027] Figure 10 This is a cross-sectional structural diagram of a drone during battery replacement, which facilitates the removal and replacement of the hydrogen storage tank of a hydrogen fuel cell.

[0028] Figure 11 This is a three-dimensional structural diagram of a first clamping assembly, a second clamping assembly, and a placement plate for replacing the battery of a drone that facilitates the replacement of the hydrogen storage tank of a hydrogen fuel cell.

[0029] The diagram is labeled as follows: 1. UAV body; 2. Cabin; 21. Fuel cell; 22. Placement plate; 221. Hydrogen storage tank; 222. Floating frame; 2221. Sliding rod; 223. First clamping assembly; 2231. Slide rail; 224. Sensor; 23. Second clamping assembly; 231. Mounting frame; 2311. Connecting rod; 2312. Clamping plate; 232. Drive block; 2321. Fixing plate; 2322. Drive rod; 24. Door; 241. Spring buckle; 25. Track. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 5 and Figures 8 to 11As shown: A drone for convenient replacement of hydrogen storage tanks for hydrogen fuel cells includes a drone body 1 and a cabin 2 disposed within the drone body 1. The cabin 2 is used to carry the hydrogen storage tank 221 of the hydrogen fuel cell, and a fuel cell 21 that can dock with the hydrogen storage tank 221 is disposed beside the hydrogen storage tank 221 in the cabin 2. A pull-out placement plate 22 is disposed at the bottom of the cabin 2. A floating frame 222 and two first clamping components 223 are provided on the placement plate 22 and elastically connected thereto. The floating frame 222 can slide relative to the placement plate 22 along the height direction. The first clamping assembly 223 is symmetrically arranged on both sides of the floating frame 222, and both first clamping assemblies 223 are connected to the floating frame 222 in a transmission manner. The movement of the floating frame 222 can drive the two first clamping assemblies 223 to move closer to each other, so as to perform initial clamping and centering on the hydrogen tank placed on the floating frame 222. The cabin 2 is equipped with a hatch 24. The top of the cabin 2 is equipped with a second clamping assembly 23 that can perform secondary clamping on the hydrogen tank, and the movement of the second clamping assembly 23 is driven by the closing action of the hatch 24.

[0032] When it is necessary to replace the hydrogen storage tank 221, first operate the hatch 24 to open it. After the hatch 24 is opened, the driving force on the second clamping assembly 23 is released, and the second clamping assembly 23 is disengaged from the hydrogen storage tank 221, and the secondary clamping state is released. Then, pull out the placement plate 22. The placement plate 22 drives the floating frame 222 and the hydrogen storage tank 221 above it to be pulled out from the cabin 2. At this time, the old hydrogen storage tank 221 can be removed from the floating frame 222. The floating frame 222 slides upward under the reset action of the elastic connection, and at the same time drives the two symmetrically arranged first clamping assemblies 223 to move away from each other and return to the open state to prepare to receive the new hydrogen storage tank 221. When replacing the hydrogen storage tank 221, it is placed on the floating frame 222. The weight of the hydrogen storage tank 221 causes the floating frame 222 to slide downwards relative to the placement plate 22 in the height direction. Since both first clamping components 223 are connected to the floating frame 222, the downward movement of the floating frame 222 will drive the two first clamping components 223 to move closer to each other, thereby achieving initial clamping of the hydrogen storage tank 221 to ensure that the position of the hydrogen storage tank 221 on the placement plate 22 is accurate and stable. After placement, the placement plate 22 is pushed, and it, together with the floating frame 222 and the hydrogen storage tank 221, is pushed into the cabin 2. After the placement plate 22 is pushed into place, the hydrogen storage tank 221 is docked with the fuel cell 21. At this time, the cabin door 24 is closed. The closing action of the cabin door 24 will drive the second clamping component 23 at the top of the cabin 2 to move towards the hydrogen storage tank 221, forming a secondary clamping on the hydrogen storage tank 221, further stabilizing the installation state of the hydrogen storage tank 221 and ensuring the normal operation of the hydrogen fuel cell system.

[0033] The replacement of the hydrogen storage tank 221 requires no complex tools, and the operation is intuitive and convenient, significantly reducing the difficulty of recharging during outdoor operations and effectively improving replacement efficiency to meet the rapid recharging needs of high-frequency drone operations. Through the closing action of the hatch 24 and the driving linkage of the second clamping component 23, the hydrogen storage tank 221 can quickly achieve secondary clamping and fixation after docking with the fuel cell 21, forming a double-clamping protection structure. This enhances the installation stability of the hydrogen storage tank 221 under various operating conditions such as drone flight and landing, effectively avoiding the problem of displacement or loosening of the hydrogen storage tank 221 due to bumps and shaking, ensuring the continuity and safety of the hydrogen fuel cell system. Furthermore, after the placement plate 22 is pushed into place, the hydrogen storage tank 221 and fuel cell 21 can be docked. Combined with the automatic centering and positioning of the first clamping component 223, the docking process is smooth and precise, requiring no additional adjustments.

[0034] like Figures 2 to 7 As shown: Both first clamping components 223 are provided with inclined slide rails 2231, and both ends of the floating frame 222 are provided with sliding rods 2221, which slide in cooperation with the slide rails 2231.

[0035] Two first clamping components 223 are mirror images of each other and are respectively arranged on both sides of the floating frame 222. When the hydrogen storage tank 221 is placed on the floating frame 222, the weight of the hydrogen storage tank 221 will cause the floating frame 222 to slide downward relative to the placement plate 22 in the height direction. The sliding rods 2221 at both ends of the floating frame 222 will move downward synchronously. Since the slide rails 2231 on the two first clamping components 223 are arranged at an angle, and the sliding rods 2221 and the slide rails 2231 are in one-to-one sliding engagement, the sliding rods 2221 in... During the descent, a lateral force is generated along the inclined slide rail 2231. This force drives the two first clamping components 223 to move closer to each other, thereby achieving initial centering and clamping of the hydrogen storage tank 221. When the old hydrogen storage tank 221 is removed, the floating frame 222 slides upward under the reset action of the elastic connection, and the sliding rod 2221 moves upward synchronously along the inclined slide rail 2231. The lateral force acts in the opposite direction on the two first clamping components 223, causing them to move away from each other and return to the open state so as to receive the new hydrogen storage tank 221.

[0036] With the sliding rod 2221 and slide rail 2231, the purely mechanical transmission method requires no additional power drive, resulting in a simple, reliable, and trouble-free structure that is suitable for the complex working conditions of drone outdoor operations. The centering clamping of the two first clamping components 223 ensures the accurate positioning of the hydrogen storage tank 221, guaranteeing smooth docking with the fuel cell 21. It also ensures that the clamping force is evenly distributed on both sides of the hydrogen storage tank 221, preventing excessive localized stress that could damage it. Simultaneously, the smooth and flexible sliding transmission reduces any jamming during operation, making the removal and placement of the hydrogen storage tank 221 more convenient and improving the efficiency of hydrogen tank replacement.

[0037] like Figure 2 , Figure 3 , Figures 8 to 11 As shown: The second clamping assembly 23 includes a mounting frame 231, a clamping plate 2312 and two connecting rods 2311. The mounting frame 231 is fixedly connected to the top of the cabin 2. The two connecting rods 2311 are hinged to the mounting frame 231 in parallel. The clamping plate 2312 is hinged to one end of the two connecting rods 2311 away from the mounting frame 231.

[0038] When the hatch 24 is closed, the closing action of the hatch 24 will cause the two connecting rods 2311 to rotate synchronously around the hinge point on the mounting frame 231. Since the two connecting rods 2311 are kept parallel and the clamping plate 2312 is hinged to the end of the two connecting rods 2311 away from the mounting frame 231, the clamping plate 2312 will be driven to descend smoothly in the vertical direction of the cabin 2 until the clamping plate 2312 is in contact with the top of the hydrogen storage tank 221 and forms a secondary clamping. At this time, the clamping force applied by the clamping plate 2312 will be transmitted to the lower part through the hydrogen storage tank 221. The floating frame 222 is kept in a depressed state, which in turn continuously drives the two first clamping components 223 to maintain a relatively clamped posture, making the initial clamping more stable. When the hatch 24 is opened, the drive mechanism acts in the opposite direction, causing the two connecting rods 2311 to rotate synchronously in the opposite direction. The clamping plate 2312 rises smoothly in the vertical direction with the connecting rods 2311, disengaging from the top of the hydrogen storage tank 221. The secondary pressing state is released, and the floating frame 222 can slide upward under the reset action of the elastic connection, causing the first clamping components 223 to be released.

[0039] The mounting bracket 231, two connecting rods 2311, and clamping plate 2312 are hinged together to form a stable parallel linkage transmission structure. This structure requires no additional power source, is simple and compact, and highly reliable, making it suitable for the lightweight requirements of drones. The two connecting rods 2311 ensure that the clamping plate 2312 remains horizontal during lifting and lowering, allowing it to fully contact the top of the hydrogen storage tank 221 during secondary clamping. This ensures even distribution of clamping force, preventing damage to the hydrogen storage tank 221 due to excessive localized force. It also effectively prevents the hydrogen storage tank 221 from tilting during clamping, ensuring the stability of the connection between the hydrogen storage tank 221 and the fuel cell 21.

[0040] like Figure 2 , Figure 3 , Figures 8 to 11 As shown: The top of the cabin 2 is provided with a fixed plate 2321 and a drive block 232 that slides in the same direction as the placement plate 22. A drive rod 2322 is provided between the drive block 232 and one of the connecting rods 2311. The two ends of the drive rod 2322 are respectively hinged to the middle of the drive block 232 and the connecting rod 2311. The drive block 232 is elastically connected to the fixed plate 2321.

[0041] When the hatch 24 is closed, the closing action of the hatch 24 will push the drive block 232 to move on the top of the cabin 2. The elastic connection structure between the drive block 232 and the fixed plate 2321 will be compressed and stored. At the same time, the drive block 232 will drive the middle of the corresponding connecting rod 2311 through the drive rod 2322, so that the two parallel connecting rods 2311 will rotate synchronously around the hinge point on the mounting frame 231. This will drive the clamping plate 2312 to descend until it is in contact with the top of the hydrogen storage tank 221 and forms a secondary clamping, so that the floating frame 222 always remains in a downward state to prevent loosening. When the hatch 24 is opened, the drive block 232 moves in the opposite direction under the reset force of the elastic connection structure, so that the clamping plate 2312 rises and disengages from the hydrogen storage tank 221, releasing the secondary clamping state on the hydrogen tank.

[0042] Through the cooperation of the fixed plate 2321, the elastically connected drive block 232 and the drive rod 2322, the linkage between the movement of the hatch 24 and the movement of the second clamping component 23 is realized. The key is that the downward pressure generated by the secondary clamping is transmitted to the floating frame 222 through the hydrogen storage tank 221, forming a synergistic linkage effect of secondary clamping and the floating frame 222 being limited to the clamping reinforcement of the first clamping component 223. This makes the initial clamping of the first clamping component 223 and the secondary clamping of the second clamping component 23 cooperate and reinforce each other, which greatly improves the installation stability of the hydrogen storage tank 221 under complex working conditions such as UAV flight and landing, and effectively avoids the problem of displacement or loosening of docking caused by turbulence.

[0043] like Figures 2 to 9 and Figure 11As shown: the clamping plate 2312 near the hydrogen storage tank 221, the floating frame 222 near the hydrogen storage tank 221, and the two first clamping assemblies 223 near the hydrogen storage tank 221 are all provided with arc-shaped structures that are adapted to the outer periphery of the hydrogen storage tank 221.

[0044] By using an arc-shaped structure to fully adapt to the outer contour of the hydrogen storage tank 221, the clamping plate 2312, floating frame 222, and first clamping assembly 223 form surface contact with the hydrogen storage tank 221 instead of point or line contact. This greatly increases the contact area, allowing the clamping force to be evenly distributed on the surface of the hydrogen storage tank 221, effectively avoiding damage to the hydrogen storage tank 221 caused by localized force concentration. It also improves clamping stability, preventing the hydrogen storage tank 221 from shifting or rotating during clamping. Furthermore, the arc-shaped structure makes the loading and unloading of the hydrogen storage tank 221 smoother, reducing the frictional resistance between the first clamping assembly 223, the second clamping assembly 23, and the hydrogen storage tank 221. The structure is also easy to manufacture and can better adapt to cylindrical hydrogen storage tanks 221 of different specifications, enhancing the versatility and practicality of the solution.

[0045] like Figures 2 to 7 As shown: The hatch 24 is fixedly connected to one end of the placement plate 22.

[0046] When the hydrogen storage tank 221 needs to be replaced, since the hatch 24 is fixedly connected to one end of the placement plate 22, pulling the placement plate 22 outward will simultaneously move the hatch 24 away from the opening of the cabin 2, causing the cabin 2 to open automatically without the need for separate unlocking and opening of the hatch 24. However, if a separate hatch 24 is used, it must be unlocked and opened separately before pulling the placement plate 22. When replacing the new hydrogen storage tank 221 and pushing the placement plate 22 into the cabin 2, the placement plate 22 will simultaneously move the hatch 24 closer to the cabin. When the placement plate 22 is fully pushed into the cabin 2 to precisely align the hydrogen storage tank 221 with the fuel cell 21, the cabin door 24 will completely close the cabin 2 opening. At this time, the closing action of the cabin door 24 will simultaneously drive the second clamping assembly 23 to perform secondary clamping on the hydrogen storage tank 221. The secondary clamping force is transmitted through the hydrogen storage tank 221 to the floating frame 222, so that the first clamping assembly 223 maintains a stable clamping state. The independently set cabin door 24 requires additional operation to close after the placement plate 22 is pushed into place.

[0047] The fixed connection of the hatch 24 to one end of the placement plate 22 simplifies the operation process compared to a separate hatch 24. It integrates the pulling action of the placement plate 22 with the opening and closing action of the hatch 24, eliminating the need for a separate operation of the hatch 24. This improves the convenience and efficiency of replacing the hydrogen storage tank 221, especially suitable for the rapid outdoor refueling needs of drones. Furthermore, this fixed connection method creates an integrated structure between the hatch 24 and the placement plate 22, with the movement of the placement plate 22 matching the opening and closing of the hatch 24.

[0048] like Figure 7 As shown: The placement plate 22 is also equipped with a sensor 224 for detecting the height position of the floating frame 222.

[0049] By setting a sensor 224 on the placement plate 22 to detect the height position of the floating frame 222, the placement status of the hydrogen storage tank 221 can be accurately fed back, avoiding subsequent operations such as pushing the plate and closing the hatch 24 when the hydrogen storage tank 221 is not in place, thus preventing problems such as unstable clamping and docking deviation. When the hatch 24 is fixed to the placement plate 22, the arrival signal of the sensor 224 ensures that the hydrogen storage tank 221 is positioned when the placement plate 22 is pushed, making the linkage action of the hatch 24 closing and secondary clamping more reliable and avoiding structural interference or clamping failure caused by the hydrogen storage tank 221 not being in place. At the same time, the detection function of the sensor 224 eliminates the need for manual judgment on whether the hydrogen storage tank 221 is in place, reducing human operation error. Especially in outdoor operating environments, it can quickly confirm operation nodes and improve replacement efficiency. In addition, the sensor 224 continuously monitors the height of the floating frame 222 and can provide real-time feedback on whether the clamping status is stable. If the floating frame 222 shifts due to abnormal conditions during flight, the sensor 224 can promptly provide an abnormal signal, ensuring the safe operation of the hydrogen fuel cell system and improving the safety, reliability and ease of operation of the solution.

[0050] like Figures 2 to 7 As shown: The hatch 24 and the opening of the cabin 2 are locked together by a spring-loaded latch 241 structure.

[0051] The spring-loaded latch 241 mechanism enables rapid locking and unlocking of the hatch 24. Compared to other complex locking mechanisms, this method is simpler and more intuitive, requiring no tools and meeting the convenience requirements of outdoor drone operations. When the hatch 24 is fixed to the placement plate 22, the automatic engagement of the spring-loaded latch 241 precisely matches the pushing stroke of the placement plate 22, ensuring that the placement plate 22 is in place, the hatch 24 closes, the spring-loaded latch 241 locks, and the secondary clamping is completed simultaneously. This avoids asynchronous locking and clamping, improving operational efficiency and structural reliability, and preventing clamping failure due to loosening of the hatch 24. Furthermore, the spring-loaded latch 241 is simple in structure, compact in size, and lightweight, without adding extra weight to the drone, meeting lightweight requirements. The locking mechanism effectively resists turbulence and vibration during drone flight, preventing accidental opening of the hatch 24 and ensuring the airtightness of the cabin 2 and the installation safety of the hydrogen storage tank 221. In addition, the spring-loaded buckle 241 structure has low wear and maintenance costs and can maintain a stable locking effect for a long time. Regardless of which hatch 24 setting it is adapted to, it can simplify operation while enhancing the sealing and safety performance of the engine compartment 2, providing a reliable guarantee for the stable operation of the hydrogen fuel cell system.

[0052] like Figures 2 to 7 and Figure 9 As shown: The bottom of the cabin 2 is provided with two horizontally extending tracks 25, and the placement plate 22 is slidably mounted on the tracks 25.

[0053] By setting two tracks 25 at the bottom of the cabin 2 and sliding the placement plate 22 on them, a precise and stable guiding foundation is provided for the pulling action of the placement plate 22. This effectively limits the lateral displacement of the placement plate 22 during the sliding process, ensuring that the placement plate 22 always moves smoothly in the preset direction. This, in turn, ensures the positional accuracy of the hydrogen storage tank 221 during the picking, placing, and docking process, and avoids the hydrogen storage tank 221 failing to enter the cabin 2 smoothly or deviating from docking with the fuel cell 21 due to the tilt of the placement plate 22. The symmetrical arrangement of the two tracks 25 can evenly distribute the weight of the placement plate 22 and the hydrogen storage tank 221, improve the load-bearing stability of the placement plate 22 during sliding, reduce wear or jamming caused by excessive force on a single track 25, and make the pulling operation smoother and less strenuous. It is especially suitable for the weight load of the hydrogen storage tank 221 and reduces the difficulty of operation during outdoor work.

[0054] like Figures 2 to 10 As shown: Both the first clamping component 223 and the second clamping component 23 are provided with anti-slip buffer layers.

[0055] By incorporating an anti-slip buffer layer (not shown in the figure), the safety and stability of the hydrogen storage tank 221 installation can be improved from multiple dimensions. In terms of anti-slip, the anti-slip buffer layer increases the frictional resistance between the first and second clamping components 223 and the hydrogen storage tank 221, effectively preventing relative displacement of the hydrogen storage tank 221 due to turbulence and vibration during UAV flight and landing. Especially during actions such as pulling out and re-clamping the placement plate 22, it prevents the hydrogen storage tank 221 from slipping or shifting, ensuring the continuity and reliability of docking with the fuel cell 21. The anti-slip effect is stable under both types of door 24 structures. In terms of cushioning, the anti-slip buffer layer absorbs the impact force during the placement of the hydrogen storage tank 221, as well as the pressure during the re-clamping process, preventing surface damage to the hydrogen storage tank 221 caused by rigid contact between the first and second clamping components 223 and the hydrogen storage tank 221. It also alleviates stress transmission caused by vibration during flight, protecting the structural integrity of the hydrogen storage tank 221. In addition, the anti-slip buffer layer can reduce friction and wear between the hydrogen storage tank 221 and the first clamping component 223 and the second clamping component 23 during the replacement process, making the removal and placement of the hydrogen storage tank 221 smoother and reducing the difficulty of operation. Regardless of the type of door 24 structure it is adapted to, it can improve the convenience of the replacement process.

[0056] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A drone for convenient replacement of hydrogen storage tanks for hydrogen fuel cells, comprising a drone body (1) and a cabin (2) disposed within the drone body (1), characterized in that, The cabin (2) is used to carry the hydrogen storage tank (221) of the hydrogen fuel cell, and a fuel cell (21) that can dock with the hydrogen storage tank (221) is provided in the cabin (2) next to the hydrogen storage tank (221). The bottom of the cabin (2) is equipped with a pull-out storage panel (22); The placement plate (22) is provided with a floating frame (222) and two first clamping assemblies (223) that are elastically connected thereto. The floating frame (222) can slide relative to the placement plate (22) in the height direction. Two first clamping components (223) are symmetrically arranged on both sides of the floating frame (222), and both first clamping components (223) are connected to the floating frame (222) in a transmission manner. The movement of the floating frame (222) can drive the two first clamping components (223) to move closer to each other, so as to perform initial clamping of the hydrogen tank placed on the floating frame (222) for centering. The cabin (2) is equipped with a door (24); The top of the cabin (2) is provided with a second clamping assembly (23) that can perform secondary compression of the hydrogen tank, and the movement of the second clamping assembly (23) is driven by the closing action of the cabin door (24).

2. The UAV for convenient replacement of hydrogen storage tanks in hydrogen fuel cells according to claim 1, characterized in that, Both first clamping assemblies (223) are provided with inclined slide rails (2231), and both ends of the floating frame (222) are provided with sliding rods (2221), which slide in cooperation with the slide rails (2231).

3. The UAV for convenient replacement of hydrogen storage tanks in hydrogen fuel cells according to claim 1, characterized in that, The second clamping assembly (23) includes a mounting frame (231), a clamping plate (2312), and two connecting rods (2311). The mounting frame (231) is fixedly connected to the top of the cabin (2). The two connecting rods (2311) are hinged to the mounting frame (231) in parallel. The clamping plate (2312) is hinged to one end of the two connecting rods (2311) away from the mounting frame (231).

4. The UAV for convenient replacement of hydrogen storage tanks in hydrogen fuel cells according to claim 3, characterized in that, The top of the cabin (2) is provided with a fixed plate (2321) and a drive block (232) that slides in the same direction as the placement plate (22). A drive rod (2322) is provided between the drive block (232) and one of the connecting rods (2311). The two ends of the drive rod (2322) are respectively hinged to the middle of the drive block (232) and the connecting rod (2311). The drive block (232) is elastically connected to the fixed plate (2321).

5. The UAV for convenient replacement of hydrogen storage tanks in hydrogen fuel cells according to claim 3, characterized in that, The clamping plate (2312) on the side near the hydrogen storage tank (221), the floating frame (222) on the side near the hydrogen storage tank (221), and the two first clamping assemblies (223) on the side near the hydrogen storage tank (221) are all provided with arc-shaped structures that are adapted to the outer periphery of the hydrogen storage tank (221).

6. A drone for conveniently replacing the hydrogen storage tank of a hydrogen fuel cell, as described in any one of claims 1-5, characterized in that, The hatch (24) is fixedly connected to one end of the placement plate (22).

7. A drone for conveniently replacing the hydrogen storage tank of a hydrogen fuel cell, as described in any one of claims 1-5, characterized in that, The placement plate (22) is also equipped with a sensor (224) for detecting the height position of the floating frame (222).

8. A drone for conveniently replacing the hydrogen storage tank of a hydrogen fuel cell, as described in any one of claims 1-5, characterized in that, The hatch (24) and the opening of the cabin (2) are locked together by a spring-loaded latch (241) structure.

9. A drone for conveniently replacing the hydrogen storage tank of a hydrogen fuel cell, as described in any one of claims 1-5, characterized in that, The bottom of the cabin (2) is provided with two horizontally extending tracks (25), and the placement plate (22) is slidably mounted on the tracks (25).

10. A drone for conveniently replacing the hydrogen storage tank of a hydrogen fuel cell, as described in any one of claims 1-5, characterized in that, Both the first clamping assembly (223) and the second clamping assembly (23) are provided with anti-slip buffer layers.

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