Heavy-load long-endurance unmanned aerial vehicle based on hydrogen fuel cell

Abstract

The invention relates to an unmanned aerial vehicle, in particular to a large-load long-endurance unmanned aerial vehicle based on a hydrogen fuel cell, which is characterized in that for the mounting work of a hydrogen storage bottle body, the hydrogen storage bottle body is supported through the matched use of an arranged stable belt body and a supporting bottom frame; the hydrogen storage bottle body is placed on the supporting bottom frame, one end of a stabilizing belt body penetrates through a connecting through groove in the supporting bottom frame, then the stabilizing belt body is tensioned, and a primary positioning effect is provided for the hydrogen storage bottle body; according to the scheme, the stabilizing assembly is arranged in the supporting bottom frame to lock the stabilizing belt body, auxiliary accessories are arranged in the stabilizing belt body to provide stability for loading of the hydrogen storage bottle body, on the other hand, when the state of the unmanned aerial vehicle is detected and maintained every time a task is executed, if the position of the hydrogen storage bottle body deviates, the situation can be known in time, and the safety of the unmanned aerial vehicle is improved. And the use safety of the hydrogen storage bottle body is ensured.

Description

Technical Field

[0001] The present invention relates to an unmanned aerial vehicle, and more particularly to a large-load and long-endurance unmanned aerial vehicle based on a hydrogen fuel cell. Background Art

[0002] The existing Chinese authorized patent document with the publication number CN220974580U discloses a hydrogen fuel cell unmanned aerial vehicle, and its solution includes: a multi-rotor unmanned aerial vehicle and a hydrogen cylinder; the multi-rotor unmanned aerial vehicle includes: a frame and a fuel cell and a rotor assembly disposed on the frame; the fuel cell is connected to the rotor assembly; the hydrogen cylinder is disposed inside the frame; the hydrogen cylinder is communicated with the fuel cell; the hydrogen cylinder is used for storing hydrogen fuel; the fuel cell is used for converting the chemical energy of the hydrogen fuel into electrical energy; the electrical energy is used for driving the rotor assembly to rotate; its solution improves the problem of space occupation of the hydrogen cylinder on the unmanned aerial vehicle, increases the fuel carrying capacity and the volumetric hydrogen storage density, and is beneficial to long endurance.

[0003] In the prior art, for the loading of the hydrogen fuel cylinder, it is generally installed and fixed at the top or directly below the body of the aircraft, and generally a support frame is used in cooperation with bolts for fixation, and its connection stability needs to be further improved, and later when performing the work of replacing the hydrogen fuel cylinder, the disassembly and assembly operations are cumbersome; furthermore, during use, after each mission is completed, the staff will detect the state of the hydrogen fuel cylinder, including its installation stability, to avoid accidents during the mission, but the detection of the stability of the hydrogen fuel cylinder is relatively troublesome, and it is difficult for the staff to know even when the position of the hydrogen fuel cylinder is shifted, which poses a certain threat to the use safety of the hydrogen fuel cell unmanned aerial vehicle.

[0004] Therefore, the present invention provides a large-load and long-endurance unmanned aerial vehicle based on a hydrogen fuel cell to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a large-load and long-endurance unmanned aerial vehicle based on a hydrogen fuel cell to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A large-load and long-endurance unmanned aerial vehicle based on a hydrogen fuel cell, including an unmanned aerial vehicle main body, flight paddles, support leg frames and a hydrogen storage cylinder body; flight paddles are disposed on the side of the unmanned aerial vehicle main body, and a hydrogen storage cylinder body and support leg frames are disposed on the bottom side of the unmanned aerial vehicle main body; Connecting fixing bodies are symmetrically and fixedly disposed at the bottom end of the unmanned aerial vehicle main body, the connecting fixing bodies are connected to support connecting members, and the hydrogen storage cylinder body is stabilized through the support connecting members provided.

[0007] Preferably, the support connecting member includes a stabilizing belt body, an auxiliary through hole, a support bottom frame, a rubber anti-slip pad, a stabilizing component and an auxiliary fitting; one end of the stabilizing belt body is fixedly connected to the connection fixing body, and an auxiliary through hole is arranged at the side position of the other end of the stabilizing belt body.

[0008] Preferably, a rubber anti-slip pad is fixedly arranged at the support surface position of the support bottom frame, and a stabilizing component is arranged in the support bottom frame.

[0009] Preferably, the stabilizing component includes a connection through groove, an accommodation cavity, a pressing plate member, an auxiliary bearing, a stabilizing cone, a regulating screw column, an auxiliary handle and an auxiliary convex head; the connection through groove is arranged through the support bottom frame and extends to the rubber anti-slip pad, an accommodation cavity is arranged on one side in the connection through groove, and a pressing plate member is movably arranged in the accommodation cavity.

[0010] Preferably, stabilizing cones are fixedly arranged at equal intervals on one side of the pressing plate member, an auxiliary bearing is embedded on the other side of the pressing plate member, the regulating screw column is threadedly connected in the support bottom frame, one end of the regulating screw column extends into the accommodation cavity and is connected to the auxiliary bearing, and an auxiliary handle is fixedly arranged at the other end of the regulating screw column.

[0011] Preferably, the auxiliary handle is arranged as a cylinder, and auxiliary convex heads are fixedly arranged at equal intervals on the outer side wall of one end of the auxiliary handle, and the auxiliary convex heads are arranged in an annular shape at equal intervals on the side of the auxiliary handle.

[0012] Preferably, an auxiliary fitting is arranged at the inner side position of the stabilizing belt body, and the auxiliary fitting includes a placement groove body, an installation card slot, a detection through hole, a bearing strip body, an installation card, a cover plate, an installation accommodation groove, a sliding groove body, a movable block body, a connection convex block, a stabilizing anti-slip stripe, a detection pin body, a connection spring and a spherical detection head; the placement groove bodies are arranged at equal intervals at the inner side position of the stabilizing belt body, installation card slots are symmetrically arranged on both sides of the placement groove bodies, installation thread grooves are arranged in the installation card slots, the detection through holes are symmetrically arranged on both sides of the stabilizing belt body and are communicated with the placement groove bodies, and a bearing strip body is placed in the placement groove body.

[0013] Preferably, a positioning thread groove is arranged on the back side of the bearing strip body and is blocked by a cover plate, an installation hole is arranged at the center position of the cover plate, and the cover plate is fixedly connected to the bearing strip body through a positioning screw, installation cards are symmetrically and fixedly arranged on both sides of the front end of the bearing strip body, installation holes are arranged in the installation cards, the installation cards are adaptively clamped in the installation card slots and are fixed by installation screws.

[0014] Preferably, mounting accommodation grooves are symmetrically arranged on the back side of the bearing strip body, sliding groove bodies are symmetrically arranged on the front side of the bearing strip body, and the sliding groove bodies are communicated with the mounting accommodation grooves. An active block body is placed in the mounting accommodation groove. A connecting convex block is fixedly arranged at the front end of the active block body. A stable anti-slip stripe is arranged at the front end of the connecting convex block. The connecting convex block is arranged in the sliding groove body. A detection pin shaft body is fixedly arranged on one side of the active block body, and a connecting spring is fixedly arranged on the side of the active block body connected to the detection pin shaft body. The other end of the connecting spring is fixedly arranged in the mounting accommodation groove.

[0015] Preferably, one active block body is arranged in one mounting accommodation groove, and a spherical detection head is arranged at one end of the detection pin shaft body.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The hydrogen fuel cell unmanned aerial vehicle designed by the present invention includes an unmanned aerial vehicle main body, flight paddles, support leg frames and a hydrogen storage cylinder body. Flight paddles are arranged on the side of the unmanned aerial vehicle main body, and a hydrogen storage cylinder body and support leg frames are arranged on the bottom side of the unmanned aerial vehicle main body. Among them, connection fixing bodies are symmetrically and fixedly arranged at the bottom end of the unmanned aerial vehicle main body. The connection fixing bodies are connected to support connecting pieces. The hydrogen storage cylinder body is stabilized through the support connecting pieces arranged. For the installation work of the hydrogen storage cylinder body, a support is formed for the hydrogen storage cylinder body through the cooperation of the stabilizing belt body and the support bottom frame, and then it is stabilized through the cooperation of the stabilizing component and the auxiliary accessories arranged. The auxiliary accessories arranged also have a detection function for whether the position of the hydrogen storage cylinder body shifts during use. Place the hydrogen storage cylinder body on the support bottom frame, and then pass one end of the stabilizing belt body through the connection through groove in the support bottom frame, and then tighten the stabilizing belt body to provide a preliminary positioning function for the hydrogen storage cylinder body. In order to ensure the loading firmness of the hydrogen storage cylinder body, in this solution, a stabilizing component is arranged in the support bottom frame to lock the stabilizing belt body, and an auxiliary accessory is arranged in the stabilizing belt body to provide stability for the loading of the hydrogen storage cylinder body. On the other hand, every time the state of the unmanned aerial vehicle is detected and maintained during the execution of tasks, if the position of the hydrogen storage cylinder body shifts, it can be known in time to ensure the use safety of the hydrogen storage cylinder body. Description of the Drawings

[0017] Figure 1 It is a top view of the structural connection of the hydrogen fuel cell unmanned aerial vehicle of the present invention; Figure 2 is Figure 1 an enlarged schematic diagram of the structural connection at A in Figure 3 It is a bottom view of the structural connection of the hydrogen fuel cell unmanned aerial vehicle of the present invention; Figure 4 It is a schematic diagram of the structural connection of the support bottom frame of the present invention; Figure 5 Schematic diagram of the front side of the internal partial structure connection of the support bottom frame of the present invention; Figure 6 Schematic diagram of the back side of the internal partial structure connection of the support bottom frame of the present invention; Figure 7 Explosion schematic diagram of the structural connection between the stable belt body and the stable component of the present invention; Figure 8 For Figure 7 Enlarged schematic diagram of the structural connection at position B in Figure 9 Schematic diagram of the front side of the structural connection of the auxiliary accessory of the present invention; Figure 10 Schematic diagram of the back side of the structural connection of the auxiliary accessory of the present invention; Figure 11 Schematic diagram of the structural connection of the locking accessory of the present invention.

[0018] In the figure: UAV main body 1, flight propeller 2, support leg frame 3, hydrogen storage cylinder body 4, connection fixing body 5, stable belt body 601, auxiliary through hole 602, support bottom frame 603, rubber anti-slip pad 604, connection through groove 701, accommodation cavity 702, extrusion plate member 703, auxiliary bearing 704, stable cone 705, regulation screw column 706, auxiliary handle 707, auxiliary convex head 708, placement groove body 801, installation card slot 802, detection through hole 803, bearing strip body 804, installation card 805, cover plate 806, installation accommodation groove 807, sliding groove body 808, movable block body 809, connection convex block 810, stable anti-slip stripe 811, detection pin shaft body 812, connection spring 813, spherical detection head 814, connection hook 901, elastic connection cord body 902, auxiliary collar 903. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely. For the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1: Please refer to Figures 1-10 , a large-load and long-endurance UAV based on a hydrogen fuel cell, including a UAV main body 1, flight propellers 2, support leg frames 3, and hydrogen storage cylinder bodies 4; flight propellers 2 are arranged on the side of the UAV main body 1, and hydrogen storage cylinder bodies 4 and support leg frames 3 are arranged on the bottom side of the UAV main body 1; wherein connection fixing bodies 5 are symmetrically and fixedly arranged at the bottom end of the UAV main body 1, the connection fixing bodies 5 are connected to support connecting members, and the hydrogen storage cylinder bodies 4 are stabilized through the provided support connecting members.

[0021] For the installation work of the hydrogen storage cylinder body 4, a support for the hydrogen storage cylinder body 4 is formed by the combined use of the set stabilizing belt body 601 and the support bottom frame 603, and then it is stabilized by the combined use of the set stabilizing components and auxiliary accessories. Among them, the set auxiliary accessories also have a detection function for whether the hydrogen storage cylinder body 4 is displaced during use; place the hydrogen storage cylinder body 4 on the support bottom frame 603, and then pass one end of the stabilizing belt body 601 through the connection through groove 701 in the support bottom frame 603, and then tighten the stabilizing belt body 601 to provide a preliminary positioning function for the hydrogen storage cylinder body 4; one end of the stabilizing belt body 601 in the support connecting piece is fixedly connected to the connection fixing body 5, and an auxiliary through hole 602 is arranged at the side position of the other end of the stabilizing belt body 601; a rubber anti-slip pad 604 is fixedly arranged at the support surface position of the support bottom frame 603.

[0022] To ensure the firm loading of the hydrogen storage cylinder body 4, a stabilizing component is provided in the support bottom frame 603. That is, after one hand tightens the stabilizing belt body 601, at the same time, the other hand rotates and adjusts the adjusting screw column 706 through the auxiliary handle 707, so that the adjusting screw column 706 pushes the pressing plate member 703 to move until the pressing plate member 703 presses the stabilizing belt body 601 tightly. And a stabilizing cone 705 is provided on one side of the pressing plate member 703, and the stabilizing cone 705 can further improve the extrusion stability of the stabilizing belt body 601. Finally, tighten the adjusting screw column 706. Here, the purpose of setting the auxiliary convex head 708 on the outer side of one end of the auxiliary handle 707 is to facilitate the staff's rotation operation of the auxiliary handle 707, and thus facilitate the tightening and loosening of the adjusting screw column 706. That is, the connecting through groove 701 in the stabilizing component runs through the support bottom frame 603 and extends into the rubber anti-slip pad 604. A receiving cavity 702 is provided on one side of the connecting through groove 701, and a pressing plate member 703 is movably arranged in the receiving cavity 702. A stabilizing cone 705 is fixedly arranged at equal intervals on one side of the pressing plate member 703. An auxiliary bearing 704 is embedded on the other side of the pressing plate member 703. The adjusting screw column 706 is threadedly connected in the support bottom frame 603. One end of the adjusting screw column 706 extends into the receiving cavity 702 and is connected to the auxiliary bearing 704. The other end of the adjusting screw column 706 is fixedly provided with an auxiliary handle 707. The auxiliary handle 707 is set as a cylinder, and auxiliary convex heads 708 are fixedly arranged at equal intervals on the outer side wall of one end of the auxiliary handle 707. The auxiliary convex heads 708 are arranged in an annular shape at equal intervals on the side of the auxiliary handle 707. That is, when it is necessary to disassemble and replace the hydrogen storage cylinder body 4 in the later stage, it is also very convenient. Just loosen the adjusting screw column 706 through the auxiliary handle 707, and pull back the pressing plate member 703 through the adjusting screw column 706, so as to release the extrusion of the pressing plate member 703 on the stabilizing belt body 601, and thus release the locking of the stabilizing belt body 601. Then, just pull out the stabilizing belt body 601 from the connecting through groove 701 in the support bottom frame 603, and the operation is convenient.

[0023] In this solution, auxiliary accessories are also provided inside the stabilizing belt body 601. That is, the placement grooves 801 in the auxiliary accessories are equidistantly arranged inside the stabilizing belt body 601, and installation card slots 802 are symmetrically arranged on both sides of the placement groove 801. Installation threaded grooves are provided in the installation card slots 802. Detection through holes 803 are symmetrically arranged on both sides of the stabilizing belt body 601, and the detection through holes 803 are communicated with the placement groove 801. A bearing strip body 804 is placed in the placement groove 801; a positioning threaded groove is provided on the back side of the bearing strip body 804, and it is blocked by a sealing cover plate 806. An installation hole is provided at the center of the sealing cover plate 806, and the sealing cover plate 806 is fixedly connected to the bearing strip body 804 through positioning screws. Installation cards 805 are symmetrically and fixedly arranged on both sides of the front end of the bearing strip body 804. Installation holes are provided in the installation cards 805. The installation cards 805 are adaptively clamped in the installation card slots 802 and fixed by installation screws; installation receiving grooves 807 are symmetrically arranged on the back side of the bearing strip body 804. Sliding grooves 808 are symmetrically arranged on the front side of the bearing strip body 804, and the sliding grooves 808 are communicated with the installation receiving grooves 807. A movable block body 809 is placed in the installation receiving groove 807. A connecting convex block 810 is fixedly arranged at the front end of the movable block body 809. A stabilizing anti-slip stripe 811 is provided at the front end of the connecting convex block 810. The connecting convex block 810 is arranged in the sliding groove 808. A detection pin shaft body 812 is fixedly arranged on one side of the movable block body 809, and a connecting spring 813 is fixedly arranged on the side of the movable block body 809 connected to the detection pin shaft body 812. The other end of the connecting spring 813 is fixedly arranged in the installation receiving groove 807; one movable block body 809 is arranged in one installation receiving groove 807, and a spherical detection head 814 is arranged at one end of the detection pin shaft body 812.

[0024] For the use of auxiliary accessories, on the one hand, it is to further improve the installation stability of the hydrogen storage cylinder body 4, that is, the stabilizing belt body 601 contacts and squeezes the hydrogen storage cylinder body 4. There is a connecting convex block 810 provided at the front end of the movable block body 809, and a stabilizing anti-slip stripe 811 is provided at the front end of the connecting convex block 810, which can also provide an anti-slip stability for the hydrogen storage cylinder body 4. On the other hand, every time a task is executed to detect and maintain the state of the drone, if the position of the hydrogen storage cylinder body 4 is offset, it can be known in time. That is, when the position of the hydrogen storage cylinder body 4 is offset, the hydrogen storage cylinder body 4 will drive the movable block body 809 to move, and the movable block body 809 will drive the detection pin shaft body 812 to move, so that the spherical detection head 814 at one end of the detection pin shaft body 812 extends outwards. That is, if the position of the hydrogen storage cylinder body 4 is offset, the spherical detection head 814 will protrude outwards from the auxiliary through hole 602 on the side of the stabilizing belt body 601. At this time, when the staff is performing detection and maintenance work, they can know the offset of the position of the hydrogen storage cylinder body 4, and then the hydrogen storage cylinder body 4 can be re-fixed to ensure the loading stability of the hydrogen storage cylinder body 4. A bright warning color can also be applied to the spherical detection head 814 for easy observation by the staff. For the reset and stabilization work of the hydrogen storage cylinder body 4, that is, first, the auxiliary handle 707 is used to drive the control wire column 706 to pull back the pressing plate 703, releasing the extrusion of the pressing plate 703 on the stabilizing belt body 601. At the same time, the contact extrusion of the stabilizing belt body 601 on the hydrogen storage cylinder body 4 is also released. The movable block body 809 in the bearing strip body 804 is reset under the action of the connecting spring 813, and then drives the detection pin shaft body 812 to retract and reset. After adjusting the position of the hydrogen storage cylinder body 4, the stabilizing belt body 601 is tightened, and then the auxiliary handle 707 is tightened to make the pressing plate 703 squeeze and fix the stabilizing belt body 601, and the loading and stabilizing work of the hydrogen storage cylinder body 4 can be completed.

[0025] Please refer to Figure 11, during the actual loading process, in order to further improve its loading firmness, this solution uses the set locking fittings to have the same stabilizing effect on the stabilizing belt body 601 and the auxiliary handle 707. Among them, the connecting hook 901 in the locking fittings is arranged at one end of the elastic connecting rope body 902, and the other end of the elastic connecting rope body 902 is provided with an auxiliary collar 903. After passing the stabilizing belt body 601 through the connecting through-hole 701 in the support bottom frame 603 and tightening it, and then tightening the auxiliary handle 707, the connecting hook 901 is hooked in the auxiliary through-hole 602 at one end of the stabilizing belt body 601. Then, tighten the elastic connecting rope body 902 until the auxiliary collar 903 at the other end of the elastic connecting rope body 902 is sleeved on the auxiliary handle 707. This process has a stabilizing effect on both the auxiliary handle 707 and the stabilizing belt body 601. Here, the auxiliary convex heads 708 arranged equidistantly in a ring shape on the outer side of the auxiliary handle 707 are equivalent to a limiting retaining ring for the auxiliary collar 903, ensuring that the auxiliary collar 903 does not slip off when sleeved on the auxiliary handle 707.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-load, long-endurance drone based on a hydrogen fuel cell, comprising a drone body (1), a flying paddle (2), a supporting leg frame (3) and a hydrogen storage bottle (4); the flying paddle (2) is arranged on the side of the drone body (1), and the hydrogen storage bottle (4) and the supporting leg frame (3) are arranged on the bottom side of the drone body (1); Features: A connecting fixing body (5) is symmetrically fixedly arranged at the bottom end of the drone body (1), the connecting fixing body (5) is connected to the supporting connecting piece, and the hydrogen storage bottle body (4) is stabilized by the provided supporting connecting piece.

2. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 1 is characterized in that: The supporting connection member comprises a stabilizing belt body (601), an auxiliary through hole (602), a supporting bottom frame (603), a rubber anti-skid pad (604), a stabilizing component and an auxiliary accessory; one end of the stabilizing belt body (601) is fixedly connected to a connecting fixing body (5), and the other end of the stabilizing belt body (601) is provided with an auxiliary through hole (602) at a side position.

3. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 2 is characterized in that: A rubber anti-skid pad (604) is fixedly arranged at the support surface of the support bottom frame (603), and a stabilizing component is arranged in the support bottom frame (603).

4. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 2 is characterized in that: The stabilizing component comprises a connecting through slot (701), a containing cavity (702), an extrusion plate (703), an auxiliary bearing (704), a stabilizing cone (705), a regulating screw (706), an auxiliary handle (707) and an auxiliary protrusion (708); the connecting through slot (701) is arranged through the supporting bottom frame (603), and the connecting through slot (701) extends into the rubber anti-slip pad (604); a containing cavity (702) is arranged on one side of the connecting through slot (701), and an extrusion plate (703) is movably arranged in the containing cavity (702).

5. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 3 is characterized by: A stabilizing cone (705) is fixedly arranged at an equal distance on one side of the extruded plate (703), an auxiliary bearing (704) is embedded in the other side of the extruded plate (703), the regulating thread column (706) is threadedly connected in the supporting bottom frame (603), one end of the regulating thread column (706) extends into the accommodating cavity (702) and is connected to the auxiliary bearing (704), and the other end of the regulating thread column (706) is fixedly arranged with an auxiliary handle (707).

6. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 3 is characterized by: The auxiliary handle (707) is configured as a column, and auxiliary protrusions (708) are fixedly disposed at equal intervals on the outer side wall of one end of the auxiliary handle (707). The auxiliary protrusions (708) are disposed in a ring-like shape at equal intervals on the side of the auxiliary handle (707).

7. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 2 is characterized by: Auxiliary accessories are arranged at the inner side of the stabilizing belt body (601), and the auxiliary accessories include a placement slot body (801), an installation card slot (802), a detection through hole (803), a bearing strip body (804), an installation card (805), a cover plate (806), an installation accommodating slot (807), a sliding slot body (808), a movable block body (809), a connecting protrusion (810), a stabilizing anti-skid strip (811), a detection pin shaft body (812), a connecting spring (813) and a spherical The detection head (814) is provided with a placement groove (801) equidistantly on the inner side of the stabilizing belt (601), and mounting grooves (802) are symmetrically provided on both sides of the placement groove (801), and mounting thread grooves are provided in the mounting grooves (802), and the detection through holes (803) are symmetrically provided on both sides of the stabilizing belt (601), and the detection through holes (803) are connected to the placement groove (801), and a bearing strip (804) is placed in the placement groove (801).

8. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 7 is characterized in that: A positioning thread groove is provided on the back side of the bearing bar (804) and is sealed by a cover plate (806); a mounting hole is provided at the center of the cover plate (806), and the cover plate (806) is fixedly connected to the bearing bar (804) by means of positioning screws; mounting cards (805) are symmetrically fixedly provided on both sides of the front end of the bearing bar (804); mounting holes are provided in the mounting cards (805); the mounting cards (805) are adapted to be snap-fitted and arranged in the mounting card slots (802) and are fixed by means of mounting screws.

9. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 7, characterized in that: The back side of the bearing bar (804) is symmetrically provided with an installation receiving groove (807), the front side of the bearing bar (804) is symmetrically provided with a sliding groove (808), and the sliding groove (808) and the installation receiving groove (807) are connected to each other. A movable block (809) is placed in the installation receiving groove (807), and a connecting protrusion (810) is fixedly provided at the front end of the movable block (809), and a stable anti-skid strip (811) is provided at the front end of the connecting protrusion (810), and the connecting protrusion (810) is arranged in the sliding groove (808). A detection pin shaft body (812) is fixedly provided on one side of the movable block (809), and a connecting spring (813) is fixedly provided on the side of the movable block (809) connected to the detection pin shaft body (812), and the other end of the connecting spring (813) is fixedly provided in the installation receiving groove (807).

10. The large-load and long-endurance UAV based on hydrogen fuel cells according to claim 7, characterized in that: A movable block (809) is disposed in one of the installation accommodating grooves (807), and a spherical detection head (814) is disposed at one end of the detection pin shaft body (812).

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