Modularized quick-release mounting and battery-expandable folding locking unmanned aerial vehicle

Abstract

The invention discloses a modular quick-release mounting and battery-extensible folding locking unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. The unmanned aerial vehicle comprises a vehicle body, a battery cabin, a mounting structure and at least two foldable vehicle arms, and the battery cabin is of a semi-open structure with the side wall open; rapid plugging and locking of the battery are realized through the buckle locking mechanism arranged on the battery cover, so that the battery cover is compatible with batteries with different volumes; the hanging structure comprises a hanging frame arranged at the top and / or the bottom of the machine body and a quick release assembly used for fixing the external equipment on the hanging frame; the foldable arms are connected with the fuselage through rotating shafts and are provided with arm locking mechanisms; on the premise that portability and reliability are guaranteed, convenient and compatible replacement of the battery, stable and rapid installation of external equipment and automatic and reliable locking of the vehicle arm in the unfolded state can be achieved.

Description

Technical Field

[0001] This invention relates to the field of drone technology, and more specifically to a modular quick-release mount and battery expandable folding locking drone. Background Technology

[0002] With the widespread application of drone technology in surveying, inspection, logistics, photography, and other fields, users have placed higher demands on drones' battery life, functional expandability, portability, and flight safety. Currently, consumer and industrial drones on the market still have significant shortcomings in the following aspects:

[0003] Poor battery system compatibility and maintainability: Most drones use fully enclosed battery compartments with fixed battery size and capacity. When users need to extend flight time, they often need to customize larger capacity batteries and simultaneously modify the battery compartment and fuselage structure, resulting in high upgrade costs, long cycles, and no backward compatibility with existing batteries. In addition, while the fully enclosed design can protect the battery, it makes quick insertion, removal, and replacement of the battery difficult, affecting operational efficiency.

[0004] The low integration and inconvenient installation of external attachments: Existing UAV attachments (such as searchlights, sensors, and delivery devices) are usually fixed by straps, adhesives, or simple screws, which is cumbersome, time-consuming, and has poor connection stability, making them prone to loosening in high-speed flight or vibrating environments. At the same time, the electrical connection between the external attachments and the UAV body often requires additional wiring, and the interfaces are not standardized, resulting in low system integration and limited scalability.

[0005] Folding arms lack a reliable flight locking mechanism: To improve portability, folding drones have become a mainstream design. However, most folding arms rely solely on friction or simple latches to maintain their unfolded state. During high-speed flight, sharp turns, or encounters with strong airflow, the arms may be subject to the combined effects of propeller drag and motor torque, causing them to unexpectedly fold back. Once the arms fold back, it can easily lead to the propeller striking the fuselage, causing a crash and posing a serious safety hazard.

[0006] In summary, there is a lack of existing technologies that can simultaneously address the challenges of flexible battery expansion, rapid integration of peripherals, and safe locking of the boom during flight. Summary of the Invention

[0007] Purpose of the invention: The purpose of this invention is to address the shortcomings of existing technologies by providing a modular quick-release mounting and battery expandable folding locking drone, which can achieve convenient and compatible battery replacement, stable and quick installation of external devices, and automatic and reliable locking of the arms in the unfolded state, while ensuring portability and reliability.

[0008] Technical solution: The present invention discloses a modular quick-release mounting and battery-expandable folding locking drone, comprising a fuselage, a battery compartment, a mounting structure, and at least two foldable arms.

[0009] The battery compartment has a semi-open structure with open side walls to allow batteries to be installed from the side. The batteries are equipped with limiting surfaces and guide structures adapted to the battery compartment structure. A releasable snap-locking mechanism is provided between the battery compartment and the batteries.

[0010] The mounting structure includes at least one bracket disposed on the top and / or bottom of the fuselage, and a quick-release assembly for detachably securing external equipment to the bracket;

[0011] The foldable arm includes an arm base for connecting the arm. The movable end of the arm base is connected to the fuselage of the multirotor via a pivot. The fuselage also has an arm locking mechanism, which includes a locking shaft. An elastic element is located below the locking shaft. Under the preload of the elastic element, the locking shaft interacts with a slide groove and a locking slot on the arm base. When the arm is in the folding or unfolding process, the locking shaft slides into the slide groove, and the arm is in an unlocked state. When the arm rotates to the unfolded position, the locking shaft falls into the locking slot under the action of the elastic element, achieving circumferential locking of the arm and preventing its rotation.

[0012] In this invention, the battery system features a semi-open battery compartment with open sidewalls that allow the battery to be inserted laterally like a drawer. The battery is guided to the installation position precisely by the matching of the limiting surface and guide groove on the battery with the corresponding structure of the battery compartment. Once in place, the latching mechanism (such as a spring latch) automatically locks the battery in place.

[0013] The mounting system in this invention provides standard mounting points on the bracket. Quick-release components (such as cam-type quick-release handles) quickly lock the equipment clips onto the bracket through a simple operation (such as rotating the handle) using the principle of mechanical force amplification (such as cam pressing), thus achieving stable installation and quick removal of external equipment.

[0014] In this invention, the boom system features a locking shaft with preload provided by a spring that dynamically engages with a special contour (slide groove and locking slot) on the boom base. During boom extension or folding, the locking shaft slides within the slide groove, placing the mechanism in a "non-locking" transitional state. When the boom rotates to its fully extended predetermined position, the locking shaft, propelled by the spring, falls from the slide groove into the communicating locking slot. The locking slot restricts the circumferential movement of the locking shaft, thereby rigidly locking the boom base to the boom body and preventing its rotation.

[0015] Furthermore, the locking mechanism also includes an upper mounting plate and a lower mounting plate, both of which are mounted on the body. The rotating shaft is mounted on the lower mounting plate. After the locking shaft and elastic element are assembled, they pass through the lower mounting plate. The entire mechanism is fixed after the upper mounting plate is closed.

[0016] The upper and lower mounting plates define the modular installation method of the locking mechanism. Core components such as the pivot, locking shaft, and spring are integrated between the upper and lower mounting plates to form an independent, pre-assembleable module. This module is then installed as a whole onto the larger structure of the fuselage.

[0017] Furthermore, the upper end of the locking shaft is equipped with a pressing part. By pressing down on the pressing part to overcome the preload of the elastic element, the locking shaft can be disengaged from the slot, thereby unlocking. The pressing part adds a manual unlocking function to the locking shaft. When it is necessary to fold the arm, manually press down on the pressing part at the upper end of the locking shaft to overcome the preload of the spring, causing the end of the locking shaft to be lifted out of the slot and released from the locked state. At this time, the arm can be freely rotated for folding.

[0018] Furthermore, the elastic element is a spring, which is sleeved on the lower end of the locking shaft and provides a preload force to the locking shaft toward the arm seat. The spring, sleeved on the lower end of the locking shaft, is always in a compressed state, thereby continuously applying an upward preload force to the locking shaft, ensuring that the locking shaft has a stable and sufficient force to press against the arm seat and can reliably fall into the slot.

[0019] The slide groove is a guide groove, and the locking groove is a recess that connects to the end of the slide groove and is used to accommodate the locking shaft. The slide groove acts as a guide channel, guiding the locking shaft to slide as the arm rotates; the locking groove acts as a termination recess, "capturing" the locking shaft in the unfolded position. The two are connected to form a "guide-lock" motion trajectory.

[0020] Furthermore, the battery compartment includes a semi-open compartment and a battery cover. The semi-open compartment is connected to the fuselage via a pin, and the battery cover is detachably connected to the side of the battery body via a connector.

[0021] The latch locking mechanism includes a latch on the battery cover and a torsion spring that drives the latch to bias toward the locking position. It also includes a latch attachment point on the battery body. When the battery body is inserted into the battery compartment along the guide structure and reaches the installation position, the latch engages with the latch attachment point under the action of the torsion spring to lock the battery body.

[0022] The battery cover is an independent movable part. When the battery is inserted, the latch on the battery cover automatically pops up under the action of a torsion spring. When the battery is pushed into place, the latch automatically engages with the attachment point on the battery. To remove, simply press the latch to release it.

[0023] Furthermore, the battery compartment also includes a battery front limiting surface disposed at the front end of the battery body, and a battery compartment front limiting surface disposed at the front of the battery compartment and matching the shape of the battery front limiting surface. The battery front limiting surface and the battery compartment front limiting surface are concentric arc surfaces, and the arc surfaces constitute a rotation guide shaft when the battery body is installed.

[0024] When installing the battery, first align the curved limiting surface at the front of the battery with the corresponding curved surface at the front of the battery compartment to form a temporary rotation axis. Then, using this as a fulcrum, rotate the rear end of the battery downwards into the compartment. The curved surfaces provide an initial, precise positioning reference, guiding the battery into the correct installation trajectory.

[0025] The battery compartment system utilizes an arc-shaped front limiting surface at the battery's tip, which mates with a corresponding concentric arc-shaped limiting surface at the front of the battery compartment. This provides a precise rotational guide axis for battery installation, resulting in smoother battery insertion and more accurate positioning. By integrating latches and torsion springs onto the battery cover and corresponding latching points on the battery, the system automatically locks the battery when pushed in and releases it instantly when pressed, enabling convenient one-handed operation. The semi-open design—constraining only key mating surfaces (such as the front and side limiting surfaces) while maintaining openness or large openings on the top and at least one side of the battery compartment—allows for compatibility with batteries of different capacities and volumes. Specifically, when a larger capacity battery is needed, only the size of the battery casing in the open direction needs to be increased without altering the drone's fuselage structure. This allows for flexible and low-cost expansion of battery life while perfectly backward compatible with existing smaller capacity batteries.

[0026] Furthermore, the quick-release assembly includes a device clip that connects to the external device, and a quick-release handle that is rotatably mounted on the bracket. The quick-release handle is provided with a cam surface. When the quick-release handle is rotated to the locked position, the large radius section of the cam surface pushes the device clip, causing the quick-release handle to clamp the device clip.

[0027] The quick-release handle is a cam. When the handle is rotated, the effective radius of its cam surface changes. When it is turned to the "locked" position, the large radius section contacts the equipment clamp, generating a strong linear thrust. This thrust is transmitted through the mechanical structure, forcing the equipment clamp to tightly hold the bracket.

[0028] Furthermore, the mounting brackets include an upper mounting bracket fixed to the top of the fuselage and a lower mounting bracket fixed to the bottom of the fuselage. Standardized mounting interfaces are provided at both the top and bottom of the fuselage, allowing different devices to be mounted simultaneously or selectively at the top and bottom (such as mounting a gimbal camera on the top and a searchlight or cargo box on the bottom), expanding the application scenarios of the drone.

[0029] Furthermore, the equipment clamp is connected to the quick-release handle via a quick-release screw; the quick-release screw passes through the equipment clamp and the bracket, and its end connects to the internal thread of the quick-release handle. Rotating the handle both drives the cam and tightens the screw, achieving double locking.

[0030] By employing a cam-type quick-release handle, when the handle is turned to the locked position, its large-radius cam surface pushes against the device clamp, generating mechanical gain to transform easy manual rotation into a powerful linear locking force, achieving the core advantages of "effortless operation and secure locking." The integrated design of the quick-release screw and handle allows for simultaneous thread tightening and cam-pressing locking with a single rotation, further enhancing connection reliability. An expansion interface board integrating multiple standard interfaces on the side of the unit provides a unified, plug-and-play electrical connection channel for external devices, avoiding messy wiring and improving system integration and ease of expansion.

[0031] Furthermore, a side expansion interface board is provided on the side of the fuselage, which has several drone equipment interfaces. An all-in-one interface board (which may include power, CAN bus, serial port, USB, etc.) is integrated on the side of the fuselage, and external devices are directly connected to this interface board via cables.

[0032] Beneficial effects: Compared with the prior art, the advantages of the present invention are as follows:

[0033] (1) By setting a locking mechanism consisting of a locking shaft, a spring, a sliding groove, and a slot, the present invention achieves the safety effect of automatically locking the arm after it is unfolded and preventing accidental folding during flight; by setting a pressing part at the upper end of the locking shaft and combining it with the preload of the spring, the invention achieves the effect of unlocking with a single press, making the arm folding operation extremely convenient; by using upper and lower mounting plates to integrate the rotating shaft, locking shaft, and spring into a modular component, the invention achieves the effect of facilitating the assembly and maintenance of the locking mechanism as a whole.

[0034] (2) By adopting a semi-open battery compartment structure with open side walls, and with the limiting surface, guide groove and releaseable buckle locking mechanism provided on the battery, the present invention produces the effect of allowing the battery to be inserted from the side and automatically locked, thus realizing the quick installation and removal of the battery.

[0035] (3) By setting standardized brackets at the top and bottom of the machine body and using a quick-release assembly consisting of equipment clips, quick-release screws and quick-release handles with cam surfaces, the present invention enables external equipment to be flexibly and quickly installed and removed in multiple positions, which significantly improves task adaptability and work efficiency. Attached Figure Description

[0036] Figure 1This is a schematic diagram of the folding arm mechanism in this invention;

[0037] Figure 2 This is a schematic diagram of the locking shaft in the slot in this invention;

[0038] Figure 3 This is a schematic diagram of the locking shaft in the slide groove in this invention;

[0039] Figure 4 This is a schematic diagram of the locking mechanism after the robotic arm is deployed in this invention;

[0040] Figure 5 This is a schematic diagram of the arm unfolding in this invention;

[0041] Figure 6 This is a schematic diagram of the battery structure in this invention;

[0042] Figure 7 This is a schematic diagram of the battery compartment structure in this invention;

[0043] Figure 8 This is another perspective view of the battery compartment in this invention;

[0044] Figure 9 This is a schematic diagram of the battery being placed in the battery compartment in this invention;

[0045] Figure 10 This is a schematic diagram of the mounting system in this invention;

[0046] Figure 11 This is a schematic diagram of the device clamp structure in this invention;

[0047] Figure 12 This is a schematic diagram of the quick-release handle in this invention;

[0048] Figure 13 This is a schematic diagram of the external device mounted on the bottom of the drone in this invention;

[0049] Figure 14 This is a schematic diagram of the external device mounted on the top of the drone in this invention;

[0050] Figure 15 This is a schematic diagram of the multi-rotor aircraft in Embodiment 4 of the present invention. Detailed Implementation

[0051] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0052] Example 1: A lockable folding arm mechanism

[0053] like Figure 1 and 2As shown, a lockable folding arm mechanism mainly includes an arm base 4-4, a rotating shaft 4-1, a locking shaft 4-2, a spring 4-3, an upper mounting plate 4-5, and a lower mounting plate 4-6.

[0054] One end of the arm mount 4-4 is used to fix and connect the arm of the UAV, and the other end is provided with a sleeve structure. A special contour groove is opened on the side wall of the sleeve structure. This contour groove is composed of a sliding groove 4-7 and a retaining groove 4-8. The sliding groove 4-7 is an arc-shaped guide groove whose extension trajectory matches the rotation path of the arm mount; the retaining groove 4-8 is a recess located at the end of the sliding groove 4-7, and its depth and shape are designed to accommodate the end of the locking shaft 4-2.

[0055] The lower mounting plate 4-6 is fixed to the fuselage of the multi-rotor by screws. The rotating shaft 4-1 is a stepped shaft, the lower end of which is press-fitted into the shaft hole of the lower mounting plate 4-6 to form a fixed connection. The sleeve structure of the arm base 4-4 is rotatably fitted onto the rotating shaft 4-1 through bearings or bushings, so that the arm base 4-1 (and the arm connected to it) can rotate around the rotating shaft 4-1 between the unfolded position and the folded position.

[0056] The core components of the locking mechanism are the locking shaft 4-2 and the spring 4-3. The locking shaft 4-2 is a cylindrical pin with a large-diameter pressing part 4-9 at its upper end for easy finger pressing. The lower section of the locking shaft 4-2 passes through a guide hole on the lower mounting plate 4-6. The spring 4-3 is a compression spring, which is sleeved on the lower section of the locking shaft 4-2 and positioned below the lower mounting plate 4-6. In its natural state, the spring 4-3 always pushes the locking shaft 4-2 upward, giving it an upward tendency to move. The upper mounting plate 4-5 is fastened to the lower mounting plate 4-6 with screws, encapsulating the entire mechanism and guiding and limiting the axial movement of the locking shaft 4-2. The middle section of the locking shaft 4-2 passes through the through hole of the upper mounting plate 4-5, and under the action of the spring 4-3, its top end (working end) always abuts against the contour groove of the arm seat 4-4.

[0057] Example 2 Semi-open battery compartment

[0058] like Figures 6-9 As shown, the battery mainly includes a battery casing 2-13 and a battery cover 2-12. The battery casing 2-13 is rotatably connected to the body 1 via a front limiting surface 2-5, allowing it to be opened or closed at a certain angle relative to the body, facilitating overall battery maintenance. The battery cover 2-12 is the main operating component for battery installation and locking. The core of the battery compartment 2 lies in its semi-open structural design: at least one side (usually facing the outside or rear of the body) of its sidewall is open or has a large opening, allowing the battery to be directly inserted or removed from that side.

[0059] To achieve precise battery guidance, reliable connection, and quick locking, the battery compartment 2 and the battery body (i.e., the battery pack) are equipped with mutually cooperating structures:

[0060] Guiding and Positioning Structure: A front limiting surface 2-5, typically a concave arc surface, is located at the front end of the battery body (referred to as the battery pack for ease of distinction). Correspondingly at the front of the semi-open compartment 2-11, a front limiting surface 2-9, precisely matching the shape of the front limiting surface 2-5, is located on the battery compartment. The front limiting surface 2-5 and the front limiting surface 2-9 form a concentric arc surface pair. During battery installation, these two arc surfaces are first aligned and contacted to form the initial rotational guide shaft for battery installation. Using this shaft as the center, the rear end of the battery can be rotated downwards and inserted into the compartment.

[0061] Electrical connection structure: A female connector 2-4 is fixedly installed on the inside of the battery cover 2-12 using screws. A male connector 2-6 is fixedly installed on the corresponding position of the semi-open compartment 2-11 (or directly on the fuselage frame fixed to the compartment) using screws. When the battery is installed in place, the female connector 2-4 and the male connector 2-6 will automatically and precisely mate to complete the power and signal connection.

[0062] Mechanical locking mechanism: A releasable latch locking mechanism is installed on the battery cover 2-12. Specifically, it includes a latch 2-3 and a torsion spring 2-1, both hinged to the battery cover 2-12 by a pin 2-2. The torsion spring 2-1 acts on the latch 2-3, providing it with a continuous torque, causing the hook-shaped end of the latch 2-3 to always deflect towards the locked position (i.e., spring upwards). On the battery body, corresponding to the position of the latch 2-3, a latch attachment point 2-10 (usually a groove or flange) is provided.

[0063] When installing the battery, once the battery has rotated into place along the guide structure (such as the fit between the guide groove 2-7 on the battery and the battery cover), the buckle 2-3 will automatically spring up and engage with the buckle attachment point 2-10 on the battery under the action of the torsion spring 2-1, thus firmly locking the battery in the battery compartment. For disassembly, simply press down on the upper end of the buckle 2-3 with your finger to overcome the torque of the torsion spring 2-1, causing the buckle hook to disengage from the buckle attachment point 2-10. Then, the battery can be lifted upwards and rotated out along the arc-shaped axis.

[0064] Auxiliary limiting structure: The battery may also be provided with a battery guide groove 2-7, which cooperates with the corresponding protrusion on the battery cover 2-12 to provide secondary guidance during installation. The battery compartment may also be provided with a battery compartment side limiting surface 2-8 to constrain the position of the battery in the width direction and ensure the accuracy of connector mating.

[0065] Example 3 Mounting Structure

[0066] like Figures 10-14 As shown, this embodiment provides a modular quick-release mounting structure 3 for unmanned aerial vehicles (UAVs). The mounting structure 3 mainly includes three parts: a mounting system, quick-release components, and a side expansion interface, which together enable the rapid installation, stable fixation, and convenient electrical integration of external devices 3-4.

[0067] The mounting system provides standardized mechanical mounting points for external equipment. In this embodiment, at least two mounting positions are provided to enhance functional flexibility: the upper mounting bracket 3-1 is fixedly installed on the top of the UAV fuselage 1. This is suitable for mounting equipment with unobstructed forward or downward visibility, such as mapping radar and communication relay equipment. The lower mounting bracket 3-2 is fixedly installed on the bottom of the UAV fuselage 1. This is the most commonly used position for mounting gimbal cameras, searchlights, and delivery devices. By setting up both upper and lower mounting brackets, users can flexibly select or use multiple mounting points simultaneously according to mission requirements, equipment functions, and center of gravity balance needs.

[0068] The quick-release assembly is the core component for enabling rapid loading and unloading of equipment. It mainly consists of equipment clamps, quick-release screws 3-7, and quick-release handles 3-4. In this embodiment, the equipment clamps include equipment clamp A 3-5 and equipment clamp B 3-6, which are connected by the quick-release screws 3-7 to form a clamping unit for directly gripping the upper bracket 3-1 or the lower bracket 3-2. The quick-release screws 3-7 act as a connecting spindle, passing sequentially through equipment clamp A 3-5, the external equipment connection part, and equipment clamp B 3-6. The quick-release handles 3-8 are rotatably mounted on the end of the quick-release screws 3-7, and their contact surface with the equipment clamps is machined into a cam-shaped arc surface.

[0069] The working principle and process of quick-release are as follows:

[0070] Installation: First, align the "slot" of the assembled external device 3-4 with the device clamp unit and insert it into the target bracket (3-1 or 3-2). At this time, the quick-release handle 3-8 is in the "open" position, and the small radius section of its cam surface is in contact with the device clamp, and the clamping unit is in a relaxed state.

[0071] Locking: Rotate the quick-release handle 3-8 to the "locked" position. During this process, the larger radius section of the cam surface gradually rotates to contact the equipment clamp. Due to the increased radius, the cam surface generates a significant outward pushing force, which, transmitted through the quick-release screw 3-7, forces the two equipment clamps (3-5, 3-6) to tighten inward simultaneously, thus clamping the bracket forcefully like a vise and achieving a secure lock.

[0072] Disassembly: Rotate the quick-release handle 3-8 in the reverse direction to the "open" position. The radius of the cam surface decreases, the pushing force is released, the clamping unit is loosened, and the entire external device module can be easily removed.

[0073] In addition, to facilitate the electrical integration of external devices with the main UAV system, a side expansion interface board 3-3 is fixedly installed on the side of the fuselage 1. This interface board 3-3 integrates several standardized UAV equipment interfaces, such as power output ports with multiple voltages, CAN bus, serial port (UART), USB, high-definition video interface, etc. After the external device 3-4 is physically fixed by the above-mentioned quick-release components, it can be connected to the corresponding interface on the side expansion interface board 3-3 by using the corresponding cable to realize power supply, control signal transmission and data communication, truly achieving "plug and play".

[0074] Example 4: A multi-rotor aircraft

[0075] This embodiment provides a multi-rotor aircraft, characterized by integrating multiple lockable folding arm mechanisms as described in Embodiment 1, semi-open battery compartments as described in Embodiment 2, and mounting structures as described in Embodiment 3.

[0076] See Figure 3 and Figure 6 The multirotor includes a fuselage body 4-10 and four folding arm mechanisms as described above.

[0077] The fuselage body 4-10 adopts a center plate 4-11 structure, which is typically made of carbon fiber composite material or aluminum alloy and has a certain thickness and strength to support equipment such as the flight controller and battery. Four mounting positions 4-12 are symmetrically arranged around the center plate 4-11. Each mounting position 4-12 has a threaded hole for fixing the lower mounting plate 4-6 in Embodiment 1.

[0078] The four lockable folding arm mechanisms are respectively fastened to the four mounting positions 4-12 of the center plate 4-11 by screws via their lower mounting plates 4-6. Each arm mechanism has an arm 4-13 fixedly mounted on its arm base 4-4, and each arm 4-13 has a motor 4-14 and a propeller 4-15 mounted at its end.

[0079] The overall operating status of the machine is as follows:

[0080] Transport / Storage Status: All arms 4-13 are in the folded state. At this time, the top of the locking shaft 4-2 of each arm mechanism is located in the slide groove 4-7 of its respective arm base 4-4, and the arms 4-13 can be folded tightly against the body, greatly reducing the overall size of the machine and making it easy to put into a backpack or transport box.

[0081] Preparing for flight: The user unfolds each arm 4-13 one by one. When an arm 4-13 is rotated to the fully unfolded position, a clear "click" sound will be heard. This is the feedback that the locking shaft 4-2 has fallen into the slot 4-8, indicating that the arm has been automatically locked. At this time, all arms 4-13 are unfolded steadily in a radial pattern, forming a stable flight platform.

[0082] Flight status: When the multi-rotor aircraft is flying at high speed or performing large maneuvers, although the arm 4-13 will be subjected to huge wind resistance and vibration, the arm base 4-4 cannot rotate because the locking shaft 4-2 is firmly restricted in the slot 4-8, thus completely avoiding the risk of the arm accidentally folding back during flight and ensuring flight safety.

[0083] Post-flight storage: After the flight, users can simply press the pressing part 4-9 of each arm mechanism locking shaft 4-2 in sequence to unlock and fold the arm, quickly restoring it to a portable state.

[0084] The lower part of the fuselage 1 has a semi-open battery compartment 2 for accommodating and quickly replacing batteries. It mainly includes a semi-open compartment body 2-11, a battery cover 2-12, and a battery body 2-13. The semi-open compartment body 2-11 is connected to the fuselage 1 via a pin or hinge and can be opened at a small angle. The front end of the battery has a front limiting surface 2-5 (concave arc surface), and the front of the battery compartment has a corresponding front limiting surface 2-9 (convex arc surface). Both are concentric arc surfaces, forming a rotational guide shaft for battery installation. A connector female 2-4 is fixed inside the battery cover 2-12, and a connector male 2-6 is fixed at a corresponding position on the fuselage. A latch 2-3 is hinged to the battery cover 2-12 via a pin 2-2, and the latch is driven by a torsion spring 2-1 to have an upward latching tendency. A latch attachment point 2-10 is provided at a corresponding position on the battery.

[0085] During installation, align the curved limiting surface 2-5 of the battery with the curved limiting surface 2-9 of the battery compartment, and use this as an axis to press down and rotate the rear end of the battery. The battery slides into the guide groove 2-7 and is precisely positioned under the constraint of the side limiting surface 2-8. At the moment of positioning, the female connector 2-4 and male connector 2-6 engage, and simultaneously, the latch 2-3 automatically springs up under the action of the torsion spring 2-1, locking into the battery's latching point 2-10. To disassemble, press the latch 2-3 to release it, and the battery can be removed.

[0086] The fuselage 1 integrates a mounting structure 3 for carrying mission equipment, including a mounting bracket, quick-release components, and a side expansion interface plate 3-3. The mounting bracket includes an upper mounting bracket 3-1 fixed to the top of the fuselage and a lower mounting bracket 3-2 fixed to the bottom of the fuselage. The quick-release components include equipment clips (such as 3-5 and 3-6) for holding external devices 3-4, quick-release screws 3-7, and quick-release handles 3-8. Quick-release screws 3-7 connect the equipment clips to the external devices, and their ends are threaded into the quick-release handles 3-4. The quick-release handles 3-8 have a cam surface on their inner side. The side expansion interface plate 3-3 is fixed to the side of the fuselage 1 and integrates various standard electrical interfaces (such as power, CAN, and serial ports).

[0087] Assemble the external device 3-4 and attach the device clip to the selected bracket (3-1 or 3-2). Rotate the quick-release handle 3-8 to the locked position. The large radius section of its cam surface pushes the device clip, generating a strong clamping force to firmly lock the device onto the bracket. Finally, connect the external device to the side expansion interface board 3-3 with a cable to complete the electrical integration.

[0088] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A modular quick-release mounting and battery-expandable folding locking unmanned aerial vehicle, comprising a fuselage (1), a battery compartment (2), a mounting structure (3), and at least two foldable arms (4), characterized in that: The battery compartment (2) is a semi-open structure. The side wall of the battery compartment (2) is open to allow the battery to be installed from the side. The battery is provided with a limiting surface and a guiding structure adapted to the battery compartment structure. A releasable buckle locking mechanism is provided between the battery compartment and the battery. The mounting structure (3) includes at least one bracket disposed on the top and / or bottom of the fuselage (1), and a quick-release assembly for detachably fixing the external equipment to the bracket; The foldable arm (4) includes an arm base (4-4) for connecting the arm. The movable end of the arm base (4-4) is connected to the fuselage of the multi-rotor via a pivot (4-1). The fuselage is also provided with an arm locking mechanism, which includes a locking shaft (4-2). An elastic element (4-3) is provided below the locking shaft (4-2). Under the preload of the elastic element (4-3), the locking shaft (4-2) can interact with the sliding groove and the slot on the arm base (4-4). When the arm is in the folding or unfolding process, the locking shaft (4-2) slides with the sliding groove, and the arm is in an unlocked state. When the arm rotates to the unfolded position, the locking shaft (4-2) falls into the slot under the action of the elastic element (4-3), thereby achieving circumferential locking of the arm and preventing it from rotating.

2. The modular quick-release mounting and battery expandable folding locking drone according to claim 1, characterized in that: The locking mechanism further includes an upper mounting plate (4-5) and a lower mounting plate (4-6), both of which are mounted on the body. The rotating shaft (4-1) is mounted on the lower mounting plate (4-6). The locking shaft (4-2) and the elastic element (4-3) are assembled and pass through the lower mounting plate. The upper mounting plate (4-5) closes and fixes the entire mechanism.

3. A modular quick-release mounting and battery expandable folding locking drone according to any one of claims 1 or 2, characterized in that: The upper end of the locking shaft (4-2) is provided with a pressing part. By pressing the pressing part downwards to overcome the pre-tightening force of the elastic element (4-3), the locking shaft (4-2) can be disengaged from the slot, thereby unlocking.

4. A modular quick-release mounting and battery expandable folding locking drone according to any one of claims 3, characterized in that: The elastic element (4-3) is a spring, which is sleeved on the lower end of the locking shaft (4-2) and provides a preload force to the locking shaft (4-2) toward the arm seat (4-4).

5. A modular quick-release mounting and battery expandable folding locking drone according to claim 1, characterized in that: The battery compartment (2) includes a semi-open compartment (2-11) and a battery cover (2-12). The semi-open compartment (2-11) is connected to the fuselage (1) by a pin, and the battery cover (2-12) is detachably connected to the side of the battery body (2-12) by a connector. The latch locking mechanism includes a latch (2-3) disposed on the battery cover (2-12) and a torsion spring (2-1) that drives the latch (2-3) to bias toward the locking position. It also includes a latch attachment point (2-10) disposed on the battery body (2-12). When the battery body (2-12) is inserted into the battery compartment along the guide structure (2-7) and reaches the installation position, the latch (2-3) engages with the latch attachment point (2-10) under the action of the torsion spring (2-1) to lock the battery body (2-12).

6. A modular quick-release mounting and battery expandable folding locking drone according to claim 5, characterized in that: The battery compartment (2) also includes a battery front limiting surface (2-5) disposed at the front end of the battery body (12), and a battery compartment front limiting surface (2-9) disposed at the front of the battery compartment and matching the shape of the battery front limiting surface (2-5). The battery front limiting surface (2-5) and the battery compartment front limiting surface (2-9) are concentric arc surfaces, and the arc surfaces constitute the rotation guide shaft when the battery body (2-12) is installed.

7. A modular quick-release mounting and battery expandable folding locking drone according to claim 1, characterized in that: The quick-release assembly includes a device clip connected to an external device (3-4) and a quick-release handle (3-8) rotatably mounted on the bracket. The quick-release handle (3-8) is provided with a cam surface. When the quick-release handle (3-8) is rotated to the locked position, the large radius section of the cam surface pushes the device clip, causing the quick-release handle to clamp the device clip.

8. A modular quick-release mounting and battery expandable folding locking drone according to claim 7, characterized in that: The mounting bracket includes an upper mounting bracket (3-1) fixed above the fuselage (1) and a lower mounting bracket (3-2) fixed below the fuselage (1).

9. A modular quick-release mounting and battery expandable folding locking drone according to claim 7, characterized in that: The device clip is connected to the quick-release handle (3-8) via quick-release screws (3-7).

10. A modular quick-release mounting and battery-expandable folding locking drone according to claim 1, characterized in that: The fuselage (1) is provided with a side expansion interface board (3-3), and the side expansion interface board (3-3) is provided with several UAV equipment interfaces.

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