Modular quick-change nose payload bay connection structure

Abstract

The utility model relates to a head task load cabin connecting structure of modularization quick change of module, belongs to unmanned plane body structure field. Including head frame, fuselage frame and multiple groups of quick unloading lock assembly, head frame is installed in the open end of head cover, and head frame and head cover constitute the head task load cabin of unmanned plane bearable, and task load is installed in the head task load cabin, and is connected with the fixed connection of head frame. The fuselage frame is installed in the one end of fuselage department towards the head, and fuselage frame and head frame face contact and positioning butt joint. Multiple groups of quick unloading lock assembly are used for the locking of fuselage frame and head frame. The utility model discloses that the task load cabin is the modularization whole structure, and each task load is independently installed in the head task load cabin of each self, and the whole change is loaded, and the connecting structure realizes the toolless quick assembly and disassembly of the whole head task load cabin and fuselage frame, avoids the bolt connection of the existing head cover and fuselage frame rim strip, and the problem that the disassembly inconvenient leads to the inconvenient task load change.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) airframe structure, specifically to a modular, quick-change nose mission payload bay connection structure. Background Technology

[0002] The nose section of a drone is the payload bay, which houses various payload devices. Currently, most of the equipment or payloads inside the drone's nose are directly mounted on the fuselage frame or connected to the fuselage frame's web via brackets. The payload bay in the nose is mostly a non-load-bearing payload bay, with no main load-bearing frame inside. The nose cone, which forms the external structure of the payload bay, is a non-load-bearing structure, only bearing aerodynamic forces and mainly serving to maintain shape and straighten airflow. The nose cone is connected to the fuselage frame's edge strip around the circumference using standard fasteners such as screws.

[0003] With the diversification of UAV functional requirements, it is necessary to replace different payloads in the nose payload bay to meet the specific functional requirements of the UAV, such as replacing them with electro-optical payloads, SAR (synthetic aperture radar) payloads, or anti-radiation payloads. During replacement, the fixed connection between the nose cone and the fuselage frame strip must first be removed, and the nose cone removed. If the payload is installed on the fuselage frame web, the original payload must first be removed from the fuselage frame web before the new payload is installed on-site. On the one hand, the nose cone and fuselage frame strip are connected using standard fasteners, and the disassembly and assembly process mostly requires tools, which is time-consuming and labor-intensive, and carries the risk of losing or misinstalling standard parts during disassembly and assembly. Excessive disassembly and assembly can also lead to problems such as deformation of the standard part holes. On the other hand, the fuselage frame or fuselage frame web needs to have corresponding interfaces to match the installation of different payloads, resulting in poor versatility and affecting replacement efficiency.

[0004] Therefore, it is necessary to provide a modular, quick-change nose mission payload bay connection structure to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved:

[0006] To overcome the shortcomings of existing technologies, this utility model provides a modular and quick-change nose mission payload bay connection structure. By designing the non-load-bearing nose mission payload bay as a load-bearing nose mission payload bay, the mission payload is directly installed in the independent nose mission payload bay. According to the functional requirements of the UAV, the overall nose mission payload bay can be modularly replaced. The modular overall nose mission payload and the fuselage frame adopt a tool-less quick-disassembly connection method to solve the problems of inconvenience and low efficiency in changing mission payloads in existing non-load-bearing nose mission payload bays.

[0007] The technical solution of this utility model is: a modular, quick-change nose mission payload bay connection structure, comprising:

[0008] The nose frame is installed at the open end of the nose cone. The nose frame and the nose cone together constitute the nose payload compartment of the UAV. The payload is installed in the nose payload compartment and is fixedly connected to the nose frame.

[0009] The fuselage frame is installed at the end of the fuselage facing the head, and the fuselage frame and the head frame face contact and are positioned and aligned.

[0010] And multiple quick-release lock assemblies, each including a lock base and a quick-release lock. The lock base is installed on the fuselage frame, and the quick-release lock is installed on the inner wall of the nose cone of the mission payload compartment. The locking rod of the lock base is inserted into the mission payload compartment of the nose and locked with the quick-release lock. The switch of the quick-release lock is exposed outside the nose cone.

[0011] The outer wall of the head frame facing the fuselage is in contact with the outer wall of the fuselage frame facing the head. The outer wall of the head frame has an annular boss at its center, and a positioning post at its center. The outer wall of the fuselage frame has an annular groove at its center, and a positioning hole at its center. The annular boss is embedded in the annular groove and docks with it, and the positioning post passes through the positioning hole.

[0012] A further technical solution of this utility model is: the nose frame is an integral structure, which includes a plate-shaped nose frame web and a nose frame edge strip surrounding the nose frame web. The outer peripheral surface of the nose frame edge strip is fixedly connected to the inner wall surface of the nose cover, and the nose frame web is perpendicular to the UAV's heading.

[0013] A further technical solution of this utility model is: the annular boss and the positioning post are provided on the outer side wall of the head frame web facing the body.

[0014] A further technical solution of this utility model is: the fuselage frame is an integral structure, and its shape matches the nose frame. The fuselage frame includes a fuselage frame belly plate and a fuselage frame edge strip surrounding the fuselage frame belly plate. The outer peripheral surface of the fuselage frame edge strip is fixedly connected to the inner wall surface of the fuselage skin. The fuselage frame belly plate is perpendicular to the UAV's heading.

[0015] A further technical solution of this utility model is: the positioning hole is provided on the web plate of the fuselage frame, and the annular groove is provided on the outer side wall of the web plate of the fuselage frame facing the head. When docking, the web plate of the head frame and the web plate of the fuselage frame are in contact.

[0016] A further technical solution of this utility model is: the inner sidewall of the head frame web and the inner sidewall of the body frame web are provided with multiple reinforcing ribs to improve the support rigidity of the head frame and the body frame.

[0017] A further technical solution of this utility model is: the lock seat is a hook-shaped lock seat, the lock seat includes a base plate and a lock rod, the base plate is installed on the inner side wall of the fuselage frame facing away from the nose frame, one end of the lock rod is fixedly connected to the base plate, and the other end passes through the fuselage frame and the nose frame in sequence to enter the nose mission payload compartment, and the end of the rod is provided with a locking ring, which is used to lock with the quick release lock.

[0018] A further technical solution of this utility model is: the quick-release lock is a hook-shaped quick-release lock, which includes a lock body, a lock hook and a switch. The lock body is installed on the inner wall of the machine head cover, the lock hook extends out of the lock body, and its end is a hook head structure. The hook head is used to engage with the lock ring, and the switch is used to control the locking and unlocking of the lock hook.

[0019] A further technical solution of this utility model is: multiple sets of quick-release lock assemblies are arranged around the perimeter of the mating surface of the body frame and the head frame, and the body frame and the head frame are respectively provided with through holes for the lock rod to pass through.

[0020] A modular, quick-change nose mission payload bay includes a nose cone, a nose frame, and a quick-release lock. The inner wall of the nose frame is equipped with an optoelectronic mission payload, a SAR mission payload, or an anti-radiation mission payload. The nose cone is provided with a cover for opening and maintaining the equipment inside the bay.

[0021] The beneficial effects of this utility model are as follows: This utility model provides a modular, quick-change nose mission load compartment connection structure. By installing the nose frame at the opening end of the nose cover, the mission load is installed inside the nose frame, transforming the non-load-bearing nose mission load compartment into a load-bearing nose mission load compartment. Simultaneously, through matching the design of the nose frame and fuselage frame structures, annular bosses and positioning posts are provided on the outer wall of the nose frame web facing the fuselage frame, while annular grooves and positioning holes are provided on the outer wall of the fuselage frame web facing the nose frame. The nose frame web and fuselage frame web surfaces are in contact, allowing the positioning posts to pass through the positioning holes, and the annular bosses to embed into the annular grooves for positioning and docking. The cooperation of the annular bosses and annular grooves not only achieves the positioning effect but also transfers the load of the nose frame to the fuselage frame, improving the load-bearing capacity of the nose frame. Finally, multiple sets of quick-release locking assemblies arranged around the nose frame and fuselage frame achieve docking and locking. This connection structure enables tool-free and rapid loading and unloading of the nose mission payload compartment and the fuselage frame, avoiding the problems of inconvenient disassembly and assembly and low efficiency of mission payload replacement caused by the existing nose cover and fuselage frame edge strips which are connected by bolts.

[0022] This utility model presents a modular, integrated nose payload bay. Each payload is independently installed within its respective nose payload bay, such as optoelectronic payloads, SAR payloads, or anti-radiation payloads. These payloads are installed inside the nose frame of their respective nose payload bays. During replacement, the entire nose payload bay can be replaced; only the fuselage frame and locking seat described in this application need to be installed on the fuselage, allowing for rapid installation and docking of the modular nose payload bay with the fuselage. The modular design improves the speed of payload replacement for UAVs, and a single fuselage frame structure can accommodate all modular nose payload bays, avoiding the need for various installation interfaces on the fuselage frame, thus improving installation versatility and replacement efficiency.

[0023] The modular quick-change nose mission payload compartment of this utility model has a simple connection structure, is easy to process, and can meet the requirements of tool-free quick disassembly and assembly. With the help of the change-up lifting platform, it can be quickly changed by a single person, so that the nose frame of the modular nose mission payload compartment can be quickly connected or separated from the fuselage frame, which has high practicality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the installation scenario of a modular, quick-change nose mission payload bay connection structure according to this utility model (the fuselage is hidden).

[0026] Figure 2 This is a schematic diagram of a modular, quick-change nose mission payload compartment connection structure according to the present invention.

[0027] Figure 3 This is a cross-sectional view of a modular, quick-change nose mission payload compartment connection structure according to this utility model;

[0028] Figure 4 This is a schematic diagram of the head frame structure in this utility model. Figure 1 (Showing the inner side facing away from the fuselage frame);

[0029] Figure 5 This is a schematic diagram of the head frame structure in this utility model. Figure 2 (Showing the outer side facing the fuselage frame);

[0030] Figure 6 This is a schematic diagram of the fuselage frame structure in this utility model. Figure 1(Showing the outer side facing the nose frame);

[0031] Figure 7 This is a schematic diagram of the fuselage frame structure in this utility model. Figure 2 (Showing the inner side of the front frame away from the main body)

[0032] Figure 8 An explosion scene depicting the installation of a modular, quick-change nose mission payload bay connection structure according to this utility model. Figure 1 (The fuselage was concealed);

[0033] Figure 9 An explosion scene depicting the installation of a modular, quick-change nose mission payload bay connection structure according to this utility model. Figure 2 (The fuselage was hidden)

[0034] Figure 10 This is a schematic diagram of a modular, quick-change nose mission payload bay according to this utility model. Figure 1 (Integrated optoelectronic mission payload);

[0035] Figure 11 This is a schematic diagram of a modular, quick-change nose mission payload bay according to this utility model. Figure 2 (Includes anti-radiation mission payload);

[0036] Figure 12 This is a schematic diagram of a modular, quick-change nose mission payload bay according to this utility model. Figure 3 (Includes SAR mission payload).

[0037] In the diagram: 1. Nose frame, 11. Nose frame web, 12. Nose frame flange, 13. Annular boss, 14. Positioning post, 2. Fuselage frame, 21. Fuselage frame web, 22. Fuselage frame flange, 23. Annular groove, 24. Positioning hole, 3. Quick release lock, 31. Lock body, 32. Lock hook, 33. Switch, 4. Lock seat, 41. Base plate, 42. Lock rod, 43. Lock ring, 5. Nose cover, 51. Exit cover, 6. Optoelectronic mission payload, 7. Anti-radiation mission payload, 8. SAR mission payload, 9. Screw. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] This utility model discloses an embodiment of a modular, quick-change nose payload bay connection structure. A nose frame is installed at the open end of the nose cone to form a load-bearing nose payload bay. The payloads are then installed on the inner sidewall of the nose frame within the nose payload bay. Each payload is independently installed in its respective nose payload bay, thus forming a modular nose payload. When changing payloads on a UAV, only the nose payload bay corresponding to the payload needs to be replaced with the entire UAV fuselage. By matching the design of the nose frame and fuselage frame structures and installing quick-release locking components, rapid docking, positioning, and locking of the nose frame and fuselage frame are achieved, enabling tool-free, quick-change of modular nose payloads.

[0040] like Figures 1-3 As shown, the modular, quick-change nose mission payload bay connection structure of this utility model includes: a nose frame 1, a fuselage frame 2, and multiple sets of quick-release lock assemblies. In the connection structure, the nose frame 1 belongs to the UAV nose section and is installed at the open end of the nose cowl 5. The fuselage frame 2 belongs to the UAV fuselage section and is installed inside the fuselage skin facing the nose. By connecting and fixing the nose frame 1 and the fuselage frame 2, the modular nose mission payload bay is connected to the fuselage as a whole.

[0041] For details, please refer to the following: Figure 8 , Figure 9 The head frame 1 is installed at the open end of the head cover 5 and is fixedly connected to the head frame 1. For example... Figure 4 , Figure 5 As shown, the nose frame 1 is an integral structure, a machined aluminum alloy web frame, comprising a plate-shaped nose frame web 11 and a nose frame flange 12 surrounding the nose frame web 11. The nose frame 1 is embedded inside the nose cover 5, with the outer circumferential surface of the nose frame flange 12 contacting the inner wall surface of the nose cover 5, and fixedly connected circumferentially by multiple screws 9, ensuring that the nose frame web 11 is perpendicular to the UAV's heading and closes the open end of the nose cover 5. Figure 10-12 As shown, the nose frame 1 and the nose cover 5 constitute the nose mission payload compartment of the UAV. A certain mission payload, such as the optoelectronic mission payload 6, the anti-radiation mission payload 7, or the SAR mission payload 8, is installed in the nose mission payload compartment. The mission payload is fixed to the inner side wall of the nose frame web plate 11 by the mounting bracket, thus forming an integral modular nose mission payload.

[0042] like Figure 6 , Figure 7As shown, the fuselage frame 2 is an integral structure, a machined aluminum alloy web frame, whose shape matches the nose frame 1 to achieve a flush outer perimeter after docking with the nose frame 1, allowing the nose cone 5 and fuselage skin to be fully docked. The fuselage frame 2 includes a plate-like fuselage frame web 21 and a fuselage frame flange 22 surrounding the fuselage frame web 21. The outer periphery of the fuselage frame flange 22 is fixedly connected to the inner wall of the fuselage skin, and the fuselage frame web 22 is perpendicular to the UAV's heading.

[0043] To achieve the positioning and docking of the head frame 1 and the fuselage frame 2, an annular boss 13 is provided at the center of the outer side wall of the head frame web 11 facing the fuselage direction. The annular boss is 6mm thick and protrudes 5mm in height. A positioning post 14 with a diameter of 5mm and a height of 8mm is provided at the center of the annular boss 13. The positioning post 14 and the annular boss 13 are coaxial. An annular groove 23 is provided at the center of the outer side wall of the fuselage frame web 21 facing the head direction. A positioning hole 24 with a diameter of 5.1mm is provided at the center of the annular groove 23. The positioning hole 24 and the annular groove 23 are coaxial. When the head frame 1 and the fuselage frame 2 are docked, the head frame web 11 and the fuselage frame web 21 are in surface contact, the annular boss 13 is inserted into the annular groove 23 and docks with it, and the positioning post 14 is inserted into the positioning hole 24 for positioning. The annular boss 13 and the annular groove 23 are fitted with a small clearance. The two fit together to achieve a positioning effect and transfer the load of the head frame 1 to the body frame 2, and then to the body, thereby improving the load-bearing capacity of the head frame 1.

[0044] To improve the support rigidity of the nose frame 1 and the fuselage frame 2, such as Figure 4 , Figure 7 As shown, multiple reinforcing ribs are provided on the inner wall of the head frame web 11 and the inner wall of the fuselage frame web 21. The reinforcing ribs on the two webs have the same structure, using two longitudinal and two transverse ribs arranged alternately.

[0045] To achieve weight reduction, this embodiment, while ensuring the rigidity of the head frame 1 and the body frame 2, provides six weight-reduction holes on both the web plate 11 of the head frame and the web plate 21 of the body frame to reduce the weight of the connecting structure. These weight-reduction holes can also serve as cable passage holes, allowing cables to pass through and enabling electrical connections between the equipment inside the head frame and the equipment inside the body.

[0046] After the nose frame 1 and fuselage frame 2 are docked, they are locked together by multiple sets of quick-release lock components, thus securing the modular nose mission payload bay to the fuselage. For example... Figure 1 , Figure 2 , Figure 8 , Figure 9As shown in this example, four sets of quick-release lock assemblies are set around the perimeter of the mating surface between the fuselage frame 2 and the nose frame 1. Each quick-release lock assembly includes a lock seat 4 and a quick-release lock 3. The lock seat 4 is installed on the fuselage frame 2, and the quick-release lock 3 is installed on the inner wall of the nose cover 5 in the nose mission payload compartment. The locking rod 42 of the lock seat 4 passes through the nose mission payload compartment and locks with the quick-release lock 3. The switch of the quick-release lock 3 protrudes from the nose cover 5 to facilitate unlocking.

[0047] Specifically, the lock seat 4 is a hook-shaped lock seat. In this embodiment, the aviation standard hook-shaped lock seat HB7463-1996 is used. The lock seat 4 includes a base plate 41 and a lock rod 42. The base plate 41 is installed on the inner side wall of the fuselage frame 2 facing away from the nose frame 1. One end of the lock rod 42 is provided with an external thread and is screwed to a corresponding threaded hole in the center of the base plate 41. The other end passes into the nose mission payload compartment. The end of the lock rod 42 that enters the nose mission payload compartment is provided with a locking ring 43, which is used to lock with the quick-release lock 3. The rod part of the lock rod 42 passes through the fuselage frame 2 and the nose frame 1. Correspondingly, through holes passing through the lock rod 42 are provided on the fuselage frame web plate 21 and the nose frame web plate 11. The quick-release lock 3 is a hook-type quick-release lock. In this embodiment, the aviation standard hook-type quick-release lock HB6858-1993 is used. The quick-release lock 3 includes a lock body 31, a lock hook 32, and a switch 33. The lock body 31 is the main part of the quick-release lock, and the lock hook 32 and the switch 33 are installed inside it. The lock body 31 is installed on the inner wall of the nose cone 5. The lock hook 32 extends out of the lock body 31. The end of the lock hook 32 is a hook head structure, which is used to engage with the lock ring 43. The switch 33 is used to control the locking and unlocking of the lock hook 32. In order to realize the operation of the switch 33, a through hole is provided on the nose cone 5 at the position corresponding to the switch 33, so that the switch 33 can be exposed outside the nose cone 5. When the hook head at the end of the lock hook 32 engages with the lock ring 43, the fuselage frame 2 and the nose cone 1 are locked. When it is necessary to unlock the connection between the lock hook 32 and the lock ring 43, the switch 33 can be pressed to unlock.

[0048] This embodiment includes a modular, quick-change nose payload bay, such as... Figure 10 , Figure 11 and Figure 12 As shown, the nose cone includes a nose cone 5, with a nose cone frame 1 installed at the open end of the nose cone to form a load-bearing nose mission load compartment. The mission load is installed inside the nose mission load compartment and is specifically fixedly connected to the web of the nose cone frame 1 by a mounting bracket. The quick-release lock 3 in the quick-release lock assembly is installed on the inner wall of the nose cone 5 near the open end, thereby forming a modular nose mission load compartment. Figure 10 It is an integrated nose section that carries optoelectronic mission payloads. Figure 11 It is an integral nose section that carries anti-radiation mission payloads. Figure 12It is an integral nose section that carries the SAR mission payload. When a replacement is needed, the integral nose section is simply docked with the fuselage frame 2 (which has a locking seat 4) of this utility model structure. The modular nose payload compartments and fuselage frame 2 use a unified mechanical and electrical interface for docking, which is universal and improves the efficiency of replacement.

[0049] To facilitate the maintenance of equipment inside the nose cone, a cover 51 is provided on the nose cone 5. The maintenance of the mission load inside the cabin can be carried out by opening the cover 51.

[0050] When assembling the modular, quick-change nose mission payload compartment, first fix the nose frame 1 to the tooling, then fix the bracket for mounting the mission payload to the inner wall of the nose frame web 11, and then install the mission payload on the bracket. Cover the nose cover 5 over the nose frame 1, and fix the nose cover 5 and the nose frame 1 with screws 9. Install quick-release locks 3 on the inner wall of the nose cover 5, and make through holes corresponding to switches 33 in the nose cover 5.

[0051] When installing the frame 2 and the lock seat 4, the frame 2 is installed on the frame, and the base plate 41 of the lock seat 4 is installed on the inner side wall of the web plate 21 of the frame. The threaded end of the frame 2 with the lock rod 41 is threadedly connected to the corresponding through hole and the base plate 41, so that the lock ring 43 is located on the outside of the frame 2.

[0052] When the nose mission payload compartment and fuselage frame 2 are docked, the nose mission payload compartment is placed on the bracket, so that the positioning pin 14 is inserted into the positioning hole 24, the annular boss 13 is embedded into the corresponding annular groove 23, and the locking ring 43 of the locking rod 41 passes through the corresponding through hole of the nose frame 1 and engages with the locking hook 32 of the quick-release lock 3 to achieve locking. After locking, the equipment cables in the nose mission payload compartment are pulled out from the cable passage hole on the belly plate 11 of the nose frame and passed through the cable passage hole on the belly plate 21 of the fuselage frame for wiring, and the wiring socket is plugged in. Finally, the maintenance cover 51 on the top of the nose mission payload compartment is installed.

[0053] When the nose mission payload compartment is completely disassembled, open the cover 51, unplug the socket, disconnect the equipment cables, press the switch 33 of the quick-release lock 3 on the outside of the nose cover 5 to unlock the quick-release lock 3, remove the modular nose mission payload compartment, and then replace it with another modular nose mission payload compartment.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular, quick-change nose mission payload bay connection structure, characterized in that, include: The nose frame is installed at the open end of the nose cone. The nose frame and the nose cone together constitute the nose payload compartment of the UAV. The payload is installed in the nose payload compartment and is fixedly connected to the nose frame. The fuselage frame is installed at the end of the fuselage facing the head, and the fuselage frame and the head frame face contact and are positioned and aligned. And multiple quick-release lock assemblies, each including a lock base and a quick-release lock. The lock base is installed on the fuselage frame, and the quick-release lock is installed on the inner wall of the nose cone of the mission payload compartment. The locking rod of the lock base is inserted into the mission payload compartment of the nose and locked with the quick-release lock. The switch of the quick-release lock is exposed outside the nose cone. The outer wall of the head frame facing the fuselage is in contact with the outer wall of the fuselage frame facing the head. The outer wall of the head frame has an annular boss at its center, and a positioning post at its center. The outer wall of the fuselage frame has an annular groove at its center, and a positioning hole at its center. The annular boss is embedded in the annular groove and docks with it, and the positioning post passes through the positioning hole.

2. The modular, rapid-change nose mission payload bay connection structure according to claim 1, characterized in that, The nose frame is an integral structure, which includes a plate-shaped nose frame web and a nose frame edge strip surrounding the nose frame web. The outer peripheral surface of the nose frame edge strip is fixedly connected to the inner wall of the nose cover. The nose frame web is perpendicular to the UAV's heading.

3. The modular, rapid-change nose mission payload bay connection structure according to claim 2, characterized in that, The annular boss and positioning post are located on the outer side wall of the head frame web facing the fuselage.

4. The modular, rapid-change nose mission payload bay connection structure according to claim 2, characterized in that, The fuselage frame is an integral structure, and its shape matches the nose frame. The fuselage frame includes a fuselage frame belly plate and a fuselage frame flange strip that surrounds the fuselage frame belly plate. The outer peripheral surface of the fuselage frame flange strip is fixedly connected to the inner wall surface of the fuselage skin. The fuselage frame belly plate is perpendicular to the UAV's heading.

5. The modular, rapid-change nose mission payload bay connection structure according to claim 4, characterized in that, The positioning hole is located on the web of the fuselage frame, and the annular groove is located on the outer side wall of the web of the fuselage frame facing the head. During docking, the web of the head frame and the web of the fuselage frame are in contact.

6. The modular, rapid-change nose mission payload bay connection structure according to claim 4, characterized in that, The inner wall of the head frame web and the inner wall of the fuselage frame web are provided with multiple reinforcing ribs to improve the support rigidity of the head frame and the fuselage frame.

7. The modular, rapid-change nose mission payload bay connection structure according to claim 1, characterized in that, The lock seat is a hook-shaped lock seat, which includes a base plate and a lock rod. The base plate is installed on the inner side wall of the fuselage frame facing away from the nose frame. One end of the lock rod is fixedly connected to the base plate, and the other end passes through the fuselage frame and the nose frame in sequence to enter the nose mission payload compartment. The end of this rod is provided with a locking ring, which is used to lock with the quick-release lock.

8. The modular, rapid-change nose mission payload bay connection structure according to claim 7, characterized in that, The quick-release lock is a hook-shaped quick-release lock, which includes a lock body, a lock hook, and a switch. The lock body is installed on the inner wall of the machine head cover, and the lock hook extends out of the lock body. Its end is a hook head structure, which is used to engage and lock with the lock ring. The switch is used to control the locking and unlocking of the lock hook.

9. The modular, rapid-change nose mission payload bay connection structure according to claim 1, characterized in that, Multiple quick-release lock assemblies are arranged around the perimeter of the mating surfaces of the body frame and the head frame, and the body frame and the head frame are respectively provided with through holes for the lock rod to pass through.

10. A modular, quick-change nose mission payload bay, characterized in that, The device includes the nose cone, nose frame, and quick-release lock as described in any one of claims 1-9. The inner wall of the nose frame is equipped with an optoelectronic mission payload, an anti-radiation mission payload, or a SAR mission payload. The nose cone is provided with a cover for opening and maintaining the equipment inside the cabin.

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