Fire extinguishing bomb carrying and launching structure based on unmanned rotorcraft

Abstract

The invention provides a fire extinguishing bomb carrying and launching structure based on a rotor unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicle fire extinguishment, the fire extinguishing bomb carrying and launching structure is characterized by comprising a mounting seat, a launching frame and a bomb backup box, and the upper end of the mounting seat is provided with a damping frame connected with an unmanned aerial vehicle structure; the launcher is rotationally connected with the mounting seat through a rotating seat, a bomb pushing fixing structure is arranged on the side, close to an opening, of the launcher and comprises a limiting plate and a driving seat, and the driving seat is used for driving the limiting plate to move towards the side away from the opening of the launcher and is matched with a bomb preparing box to conduct fire extinguishing bomb filling; and the standby bomb box is located at the lower end of the launching rack, is arranged close to the bomb pushing fixing structure, and comprises a lifting mechanism used for jacking the fire extinguishing bomb into the launching rack to be filled with the fire extinguishing bomb. The device has the advantages that magazine type filling use of the fire extinguishing bombs can be achieved, the single-wheel projection bullet carrying amount is increased, the overall fire extinguishing effect is improved, stable guiding can be conducted in cooperation with a launcher structure, and the overall fire extinguishing projection precision is improved.

Description

Technical Field

[0001] This invention relates to the field of drone firefighting technology, and in particular to a fire extinguishing projectile launch structure based on a rotary-wing drone. Background Technology

[0002] With the development and popularization of drone technology, more and more tasks are being carried out by modified rotary-wing drones, especially in high-rise fire fighting, where their ability to fly freely and deploy appropriate fire extinguishing agents or water sources can effectively suppress the spread of fire and improve the overall fire fighting effect.

[0003] Patent CN2023115316364 discloses a fire extinguishing projectile launching device mounted on a drone. This device, through its corresponding launching and projectile storage structure, can fully meet the requirements for launching fire extinguishing projectiles while reducing the size of related equipment to meet the drone's carrying requirements. However, such devices often only allow for single or multiple launches of the corresponding fire extinguishing projectiles during use, resulting in relatively poor overall fire suppression. Furthermore, due to limitations in the storage structure's size and usage method, the overall charge and storage capacity of the fire extinguishing projectiles are relatively small, further leading to unsatisfactory overall fire extinguishing effects. Additionally, if the fire is too large, the hot airflow can severely interfere with the projectile's launch trajectory. The launch guidance structure of this design is relatively simple and cannot fully meet the launch requirements.

[0004] Therefore, there is an urgent need in the market for a structure that can fully guarantee the fire extinguishing effect and achieve stable and accurate delivery to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a fire extinguishing projectile launching structure based on a rotary-wing UAV, which solves the technical problems of insufficient projectile quantity, poor accuracy, and poor overall fire extinguishing effect in the prior art. It achieves the technical effect of increasing the projectile quantity, improving the overall delivery accuracy, and improving the overall fire extinguishing effect.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] A fire extinguishing projectile launch structure based on a rotary-wing UAV includes a mounting base, a launcher, and a reserve ammunition box.

[0008] The mounting base has a shock-absorbing frame at the upper end for use with bolts to connect with the UAV structure;

[0009] The main body of the launcher is a rectangular frame with openings at both ends. The launcher is rotatably connected to the mounting base via a rotating seat to adjust the rotation angle of the launcher. The launcher has a projectile-pushing fixing structure on the side near the opening. The projectile-pushing fixing structure includes a limiting plate and a drive seat. The drive seat is located on both sides of the launcher and is used to cooperate with the lead screw and motor to drive the limiting plate to move away from the opening of the launcher, in order to cooperate with the ammunition box for loading fire extinguishing projectiles.

[0010] The ammunition box is located at the lower end of the launcher and is positioned close to the ammunition-pushing fixing structure. The ammunition box includes a lifting mechanism for lifting the fire extinguishing ammunition into the launcher for loading.

[0011] As an improvement, the mounting base includes a mounting plate and an electric push rod. The mounting plate has guard plates on both sides, and its width is the same as that of the launcher. The electric push rod is located on both sides of the mounting plate and is rotatably connected to the mounting plate by a rotating pin. Rotating seats are symmetrically fixed on both sides of the launcher. The rotating seats have rotating pins inside that are rotatably connected to the push rod part of the electric push rod to cooperate with the rotation of the rotating launcher.

[0012] A control box is fixed to one side of the mounting base. The control box contains an electric excitation module. One end of the electric excitation module is connected to the excitation end of the limiting plate via a circuit, and is used to fire the fire extinguishing bomb.

[0013] As an improvement, the upper end of the mounting plate is provided with a sliding groove. There are two sets of shock absorbers, which are symmetrically arranged along the axis of the launcher and located above the sliding groove of the mounting plate. The shock absorber includes a connecting seat, a shock absorber spring rod and a sliding frame. The connecting seat has a through hole inside and is slidably connected to the sliding frame. The two ends of the sliding frame have sliders that are slidably connected to the sliding groove.

[0014] There are two sets of shock-absorbing spring rods, which are arranged opposite each other below the sliding frame and are fixedly connected to the mounting plate by bolts. Each set of shock-absorbing spring rods includes two support structures, which are respectively set against the slider and the connecting seat, and are used to stop the entire launcher when the fire extinguishing shell is launched.

[0015] As an improvement, the launcher also includes a fixing plate and a launch guide rail. The fixing plate is fixed to the upper and lower ends of the launcher. The lower fixing plate has a partition. The partition is located on the axis of the launcher and is used to longitudinally divide the launch space. A gap is left between the upper end of the partition and the upper fixing plate to accommodate the fire extinguishing projectile for sliding movement.

[0016] As an improvement, the launch rails consist of four sets, which are fixed back to back and symmetrically arranged with the launcher axis as the reference, dividing the launch space into four parts. The two sides of the launch rails have fixing blocks that are fixedly connected to the launcher and the partition. The inner side of the launch rails is slidably connected to a slider, and the upper end of the slider has an arc-shaped groove for fixing and guiding the launch direction in accordance with the shape of the fire extinguishing projectile.

[0017] As an improvement, the drive seat of the projectile fixing structure has two sets, which are symmetrically fixed on both sides of the launcher. The drive seat has a transmission gear structure that rotates inside. The transmission gear is offset on one side of the axis of the central hole of the drive seat and is connected to the inner lead screw. The two sides of the limiting plate have symmetrical fixing blocks that are fixedly connected to the lead screw. The side of the lead screw away from the limiting plate has a guide block. The guide block cooperates with the protrusions on both sides of the launcher to achieve overall limiting and sliding.

[0018] As an improvement, a motor is provided below the drive base. The motor is fixed to the launcher by bolts. The rotating shaft of the motor is connected to the drive base through a sprocket structure to drive the inner gear of the drive base to rotate, and adjusts the position of the limit plate in conjunction with the lead screw structure.

[0019] As an improvement, the ammunition box has an internal cavity with an opening at its upper end. The ammunition box has sliding seats on both sides for sliding connection with the slide rail structure at the lower end of the launcher. The upper end of the ammunition box has a pin hole near the limiting plate for connecting with the limiting plate with a pin and for linkage loading with the limiting plate.

[0020] As an improvement, the ammunition box also includes a lifting plate located at the bottom of the ammunition box. The lifting plate has a limiting groove in the middle for use with the positioning frame of the fire extinguishing bomb for limiting and fixing. The lifting plate has threaded sleeves on both sides. The lifting mechanism includes a lead screw moving structure and a lead screw motor. The lead screw moving structure is set perpendicular to the lifting plate and is connected to the threaded sleeves for transmission. The rotating shaft of the lead screw motor is connected to the lead screw moving structure through a sprocket structure for driving the lead screw to rotate and lift the lifting plate.

[0021] As an improvement, the positioning frame has a positioning block on its inner side. The positioning block is located inside the positioning frame and is detachably connected to the positioning frame by bolts. A magnet is fixed on one side of the positioning block, and one side of the magnet has an arc groove for fixing and positioning the fire extinguishing bomb.

[0022] The beneficial effects of this invention are as follows: by setting the mounting base and shock absorber structure, it can be easily adapted to the installation and fixation of drones of different sizes. With the help of electric push rods and rotating bases, the launch angle can be flexibly adjusted in flight, which facilitates aiming control and improves the overall projection accuracy.

[0023] By setting up a launcher and launch rails, the lightweight fire extinguishing projectiles can be guided in a directional manner, which facilitates the installation and use of UAV equipment and further improves the flight stability of the projectiles, thereby improving the projection accuracy and range. It can also increase the amount of fire extinguishing projectiles that can be projected in a single shot, thus improving the overall coverage and fire extinguishing effect.

[0024] By setting up a fixed structure for pushing the ammunition and a spare ammunition box, a "magazine" feeding effect can be achieved, increasing the overall ammunition capacity carried by the UAV during a single flight and ensuring the fire extinguishing effect of the fire extinguishing ammunition. By setting up a positioning frame, the fire extinguishing ammunition can be quickly positioned and used, ensuring the overall reliability of ammunition loading, while also facilitating subsequent resupply of fire extinguishing ammunition. Attached Figure Description

[0025] Figure 1 This is a front view of a fire extinguishing projectile launching structure based on a rotary-wing unmanned aerial vehicle (UAV) according to the present invention.

[0026] Figure 2 for Figure 1 Enlarged structural diagram of Part A;

[0027] Figure 3 This is a front view of the loading state of a fire extinguishing projectile launching structure based on a rotary-wing UAV according to the present invention;

[0028] Figure 4 This is a left sectional view of the launcher portion in the loading state of a fire extinguishing projectile-borne launch structure based on a rotary-wing UAV according to the present invention;

[0029] Figure 5 This is a front sectional view of the ammunition box portion of a fire extinguishing ammunition-carrying and launching structure based on a rotary-wing UAV according to the present invention.

[0030] In the diagram: 1. Mounting base; 2. Shock absorber frame; 3. Control box; 4. Launcher; 5. Projectile launching and fixing structure; 6. Ammunition box; 7. Fire extinguishing projectile;

[0031] 101. Mounting plate; 102. Rotary seat; 103. Electric actuator;

[0032] 201. Connecting seat; 202. Shock-absorbing spring rod; 203. Sliding bracket;

[0033] 401. Rotating seat; 402. Fixed plate; 403. Launching guide rail; 404. Slider;

[0034] 501. Limit plate; 502. Drive base; 503. Motor;

[0035] 601. Sliding seat; 602. Lifting plate; 603. Lifting mechanism;

[0036] 701. Positioning frame; 702. Positioning block. Detailed Implementation

[0037] To make the content of this invention easier to understand, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0038] like Figures 1 to 3 As shown, a fire extinguishing bomb launching structure based on a rotary-wing UAV includes a mounting base 1, a launcher 4, and a reserve bomb box 6. The mounting base 1 has a shock-absorbing frame 2 on its upper end for connection with the UAV structure using bolts. The launcher 4 has a rectangular frame as its main body and openings at both ends. The launcher 4 is rotatably connected to the mounting base 1 via a rotating seat 102 for adjusting the rotation angle of the launcher 4. The launcher 4 has a bomb-pushing fixing structure 5 on the side near the opening. The bomb-pushing fixing structure 5 includes a limiting plate 501 and a drive seat 502. The drive seat 502 is located on both sides of the launcher 4 and is used to drive the limiting plate 501 to move away from the opening of the launcher 4 with the help of a lead screw and a motor 503, for loading fire extinguishing bombs 7 into the reserve bomb box 6. The reserve bomb box 6 is located at the lower end of the launcher 4 and is set close to the bomb-pushing fixing structure 5. The reserve bomb box 6 includes a lifting mechanism 603 for lifting the fire extinguishing bombs 7 into the launcher 4 for loading. The fire extinguishing projectile 7 includes a projectile body and a tail tube. The projectile body is teardrop-shaped with a threaded port at one end. A fuse is connected inside the threaded port. The fuse can be a pressure-activated fuse or a timing fuse. The tail tube is located on the side of the projectile body away from the threaded port. The outer side of the tail tube has stabilizing fins. The tail tube is filled with propellant and an electrical signal-activated fuse, which are used in conjunction with the limiting plate 501 to achieve remote-controlled firing.

[0039] The mounting base 1 includes a mounting plate 101 and an electric push rod 103. The mounting plate 101 has protective plates on both sides, with a width consistent with the launcher 4. The electric push rod 103 is located on both sides of the mounting plate 101 and is rotatably connected to the mounting plate 101 via rotating pins. Rotating seats 401 are symmetrically fixed on both sides of the launcher 4. The rotating seats 401 have rotating pins inside that are rotatably connected to the push rod portion of the electric push rod 103, used to cooperate with the rotation of the launcher 4 via the rotating seat 102. A control box 3 is fixed to one side of the mounting base 1. The control box 3 contains an electric excitation module. One end of the electric excitation module is connected to the excitation end of the limiting plate 501 via a circuit, used to fire the fire extinguishing projectile 7. An angle sensor is located on one side of the rotating seat 102 near the connecting shaft. The angle sensor is used to identify the degree of rotation of the launcher 4 and the rotating seat 102, determining the overall pitch angle information data.

[0040] In use, the operator can connect and fix the shock absorber 2 structure to the rotorcraft UAV, then connect and fix the mounting base 1 to the shock absorber 2, and then push the ammunition box 6 into the predetermined position of the launcher 4 and connect it to the ammunition pushing and fixing structure 5. The overall position of the launcher 4 is offset to one side of the rotorcraft UAV's axis, so that the ammunition box 6 structure is at the center of gravity of the launcher 4, ensuring the overall balance of the aircraft. When the fire extinguishing bomb 7 is in the launcher 4, the rotorcraft UAV can fly to the designated altitude and control the angle of the electric push rod 103 according to the image data, so that it aims at the fire location. At this time, the operator can send a corresponding signal to the electric excitation module of the control box 3 through the remote control signal, and ignite the booster propellant in the tail tube of the fire extinguishing bomb 7 to fly along the launcher 4. When the fire extinguishing bomb flies for a corresponding time or comes into contact with a hard wall, it will release the internal fire extinguishing agent to extinguish the fire.

[0041] However, in actual use, the fire extinguishing bomb 7 generates a large reverse force when igniting the propellant and launching it in conjunction with the launcher 4, which seriously affects the normal flight of the rotary-wing UAV. Therefore, in order to ensure the stable operation of the equipment as a whole, the following improvements were made:

[0042] like Figure 2As shown, the upper end of the mounting plate 101 has a sliding groove. There are two sets of shock absorber frames 2, symmetrically arranged along the axis of the launcher 4 and located above the sliding groove of the mounting plate 101. Each shock absorber frame 2 includes a connecting seat 201, a shock absorber spring rod 202, and a sliding frame 203. The connecting seat 201 has a through hole inside and is slidably connected to the sliding frame 203. Both ends of the sliding frame 203 have sliders that are slidably connected to the sliding groove. There are two sets of shock absorber spring rods 202, arranged opposite each other below the sliding frame 203 and fixedly connected to the mounting plate 101 by bolts. Each set of shock absorber spring rods 202 includes two support structures, which respectively abut against the slider and the connecting seat 201, used to restrain the entire launcher 4 during the launch of the fire extinguishing grenade 7. The shock absorber spring rods 202 suppress the overall backward movement of the mounting base 1 at horizontal and 30° oblique angles. The two ends of the obliquely arranged shock absorber spring rods 202 have rotating pins that are rotatably connected to the corresponding support structures, thereby achieving displacement coordination.

[0043] When the launcher 4 fires the fire extinguishing projectile 7, the resulting reaction force is transmitted along the electric push rod 103 and the rotating seat 102 to the connection of the shock absorber 2. At this time, the entire mounting seat 1 will move to one side along the sliding groove. The shock absorber spring rod 202 will push and pull the corresponding support structure to suppress the subsequent movement of the mounting seat 1, thereby canceling the reaction force and reducing the impact of the launcher 4 vibration on the rotary-wing UAV, effectively ensuring the stable flight of the UAV.

[0044] When the Fire Extinguishing Grenade 7 is launched, the overall flight angle is controlled by the tail fin structure of the projectile, resulting in poor guidance control during launch and a tendency to deviate during flight. Therefore, the following improvements were made to ensure stability during flight:

[0045] like Figure 4 As shown, the launcher 4 also includes a fixing plate 402 and a launch guide rail 403. The fixing plate 402 is fixed to the upper and lower ends of the launcher 4. The lower fixing plate 402 has a partition plate located on the axis of the launcher 4, which is used to longitudinally divide the launch space. A gap is left between the upper end of the partition plate and the upper fixing plate 402 to accommodate the sliding movement of the fire extinguishing projectile 7. There are four sets of launch guide rails 403, which are fixed back to back and symmetrically arranged with the axis of the launcher 4 as the reference, dividing the launch space into four parts. The two sides of the launch guide rail 403 have fixing blocks that are fixedly connected to the launcher 4 and the partition plate. A slider 404 is slidably connected to the inner side of the launch guide rail 403. The upper end of the slider 404 has an arc-shaped groove for fixing and guiding the launch direction of the fire extinguishing projectile 7. The launch guide rail 403 has a return spring inside, which is located at the lower end of the slider 404. After the slider 404 delivers the fire extinguishing projectile 7, it moves in the opposite direction to return to its original position.

[0046] When in use, the pusher fixing structure 5 pushes the fire extinguishing projectile onto the launch rail 403. The groove on its inner side will accommodate the placement of the fire extinguishing projectile 7 and magnetically limit it on the side away from the projection direction. When the propellant of the fire extinguishing projectile is ignited, the slider 404 will move along the axial direction on the launch rail 403. After reaching the end of the launch rail 403, it will be stopped by the corresponding limiting structure and separated from the fire extinguishing projectile 7, realizing guided launch during the launch phase and improving subsequent flight stability.

[0047] When in use, the Fire Extinguishing Grenade 7 is usually launched in a single flight. The limited number of Fire Extinguishing Grenade 7 structures that can be carried in a single flight affects the overall fire extinguishing effect and makes it unsuitable for large fires. To ensure the overall fire extinguishing effect, the following improvements have been made:

[0048] like Figure 3 As shown, the drive seat 502 of the projectile-pushing fixing structure 5 consists of two sets, symmetrically fixed on both sides of the launcher 4. The drive seat 502 has a rotating transmission gear structure inside, offset to one side of the central hole axis and connected to an inner lead screw. The limiting plate 501 has symmetrical fixing blocks on both sides, fixed to the lead screw. The side of the lead screw away from the limiting plate 501 has a guide slider, which engages with protrusions on both sides of the launcher 4 to achieve overall limiting and sliding. A motor 503 is located below the drive seat 502, fixed to the launcher 4 with bolts. The shaft of the motor 503 is connected to the drive seat 502 via a sprocket structure, driving the inner gear of the drive seat 502 to rotate, thus adjusting the position of the limiting plate 501 in conjunction with the lead screw structure. The inner side of the limiting plate 501 is provided with a tail flame guide groove. The tail flame guide groove is set on the side away from the flight direction of the fire extinguishing projectile 7. It is used to remove excess tail gas and high temperature hot gas in the launcher 4, stabilize the launcher 4 as a whole, and reduce the reaction force on the launcher 4 as a whole when the fire extinguishing projectile 7 is launched.

[0049] like Figure 5As shown, the ammunition box 6 has an internal cavity with an opening at its upper end. The ammunition box 6 has sliding seats 601 on both sides for sliding connection with the slide rail structure at the lower end of the launcher 4. The upper end of the ammunition box 6 near the limiting plate 501 has a pin hole for connecting with the limiting plate 501 using a pin, facilitating loading in conjunction with the limiting plate 501. The ammunition box 6 also includes a lifting plate 602 located at the bottom of the ammunition box 6. The lifting plate 602 has a limiting groove in its middle for limiting and fixing with the positioning frame 701 of the fire extinguishing bomb 7. The lifting plate 602 has threaded sleeves on both sides. The lifting mechanism 603 includes a lead screw moving structure and a lead screw motor. The lead screw moving structure is perpendicular to the lifting plate 602 and is connected to the threaded sleeves. The shaft of the lead screw motor is connected to the lead screw moving structure via a sprocket structure, driving the lead screw to rotate and lift the lifting plate 602. The positioning frame 701 has a positioning block 702 on its inner side. The positioning block 702 is located inside the positioning frame 701 and is detachably connected to the positioning frame 701 by bolts. A magnet is fixed to one side of the positioning block 702, and one side of the magnet has an arc groove for fixing and positioning the fire extinguishing projectile 7. A boss is fixed to the upper end of the lifting plate 602. After the boss is raised, its overall height is higher than the bottom height of the launcher 4, so that the axial height of the positioning frame 701 coincides with the axial height of the launcher 4, which facilitates the projectile pushing and fixing structure 5 to push it into the inner side of the launcher 4.

[0050] When in use, after the previous round of fire extinguishing shells 7 has been launched, the motor 503 will push out the limiting plate 501 through the drive seat 502 and the lead screw structure. Then the limiting plate 501 will separate from the launcher 4 and drive the ammunition box 6 to move synchronously. When the corresponding position is vacated, the lifting mechanism 603 will drive the lifting plate 602 to move upward, and at the same time drive the positioning frame 701 to the loading height of the launcher 4. Then the motor 503 will reverse, drive the limiting plate 501 to move towards the launcher 4, and push the positioning frame 701 into the launcher 4. At the same time, the end of the electric excitation module will be plugged into the tail tube to achieve energized contact and wait for launch. During this process, the positioning frame 701 will be movably plugged into the notch position of the launcher 4 to realize the recovery and fixation of the positioning frame 701. The positioning block 702 will cooperate with the slider 404 to position and enter the ready-to-launch state. After all the fire extinguishing bombs 7 have been launched, the operator can control the aircraft to descend, quickly remove the ammunition box 6, retrieve the positioning frame 701 in the launcher 4, and reposition the fire extinguishing bombs 7 to achieve a rapid overall loading effect, which is convenient for operation.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fire extinguishing projectile launching structure based on a rotary-wing unmanned aerial vehicle, characterized in that, It includes a mounting base (1), a launcher (4), and a spare ammunition box (6). The mounting base (1) has a shock absorber (2) on its upper end, which is used to connect with the UAV structure in conjunction with bolts; The main body of the launcher (4) is a rectangular frame with openings at both ends. The launcher (4) is rotatably connected to the mounting base (1) via a rotating seat (102) for adjusting the rotation angle of the launcher (4). The launcher (4) has a push-ball fixing structure (5) on the side near the opening. The push-ball fixing structure (5) includes a limiting plate (501) and a drive seat (502). The drive seat (502) is located on both sides of the launcher (4) and is used to cooperate with the lead screw and motor (503) to drive the limiting plate (501) to move away from the opening of the launcher (4) for loading fire extinguishing shells (7) into the ammunition box (6). The ammunition box (6) is located at the lower end of the launcher (4) and is set close to the projectile fixing structure (5). The ammunition box (6) includes a lifting mechanism (603) for lifting the fire extinguishing projectile (7) into the launcher (4) for loading.

2. The fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claim 1, characterized in that, The mounting base (1) includes a mounting plate (101) and an electric push rod (103). The mounting plate (101) has guard plates on both sides, and its width is the same as that of the launcher (4). The electric push rod (103) is located on both sides of the mounting plate (101) and is rotatably connected to the mounting plate (101) by a rotating pin. Rotating seats (401) are symmetrically fixed on both sides of the launcher (4). The rotating seats (401) have rotating pins inside that are rotatably connected to the push rod part of the electric push rod (103) to cooperate with the rotation of the rotating seat (102) and the rotation of the launcher (4). A control box (3) is fixed on one side of the mounting base (1). The control box (3) contains an electric excitation module. One end of the electric excitation module is connected to the excitation end of the limiting plate (501) through a line, and is used to fire the fire extinguishing bomb (7).

3. The fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claim 2, characterized in that, The upper end of the mounting plate (101) has a sliding groove. There are two sets of shock absorbers (2), which are symmetrically arranged along the axis of the launcher (4) and located above the sliding groove of the mounting plate (101). The shock absorber (2) includes a connecting seat (201), a shock absorber spring rod (202) and a sliding frame (203). The connecting seat (201) has a through hole inside and is slidably connected to the sliding frame (203). The two ends of the sliding frame (203) have sliders that are slidably connected to the sliding groove. There are two sets of shock-absorbing spring rods (202), which are arranged opposite to each other below the sliding frame (203) and are fixedly connected to the mounting plate (101) by bolts. Each set of shock-absorbing spring rods (202) includes two support structures, which are respectively set against the slider and the connecting seat (201) for the braking action of the entire launch frame (4) when the fire extinguishing bullet (7) is launched.

4. A fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claims 1 to 3, characterized in that, The launcher (4) also includes a fixing plate (402) and a launch guide rail (403). The fixing plate (402) is fixed to the upper and lower ends of the launcher (4). The lower fixing plate (402) has a partition. The partition is located on the axis of the launcher (4) and is used to longitudinally divide the launch space. There is a gap between the upper end of the partition and the upper fixing plate (402) for accommodating the fire extinguishing projectile (7) to slide.

5. The fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claim 4, characterized in that, There are four sets of launch rails (403), which are fixed back to back and symmetrically arranged with the launcher (4) axis as the reference, dividing the launch space into four parts. The launch rails (403) have fixing blocks on both sides that are fixedly connected to the launcher (4) and the partition. The inner side of the launch rails (403) is slidably connected to a slider (404). The upper end of the slider (404) has an arc-shaped groove, which is used to fix the shape of the fire extinguishing bomb (7) and guide the launch direction.

6. The fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claim 1, characterized in that, The pusher fixing structure (5) has two sets of drive seats (502), which are symmetrically fixed on both sides of the launcher (4). The drive seat (502) is equipped with a transmission gear structure. The transmission gear is offset on one side of the axis of the center hole of the drive seat (502) and is connected to the inner screw. The limiting plate (501) has symmetrical fixing blocks on both sides that are fixed to the screw. The screw has a guide block on the side away from the limiting plate (501). The guide block cooperates with the protrusions on both sides of the launcher (4) to achieve overall limiting sliding.

7. The fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claim 6, characterized in that, A motor (503) is provided below the drive seat (502). The motor (503) is fixed to the launcher (4) by bolts. The rotating shaft of the motor (503) is connected to the drive seat (502) through a sprocket structure to drive the inner gear of the drive seat (502) to rotate, and adjust the position of the limit plate (501) in conjunction with the screw structure.

8. The fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claim 1, characterized in that, The ammunition box (6) has an internal cavity and an opening at its upper end. The ammunition box (6) has sliding seats (601) on both sides for sliding connection with the slide rail structure at the lower end of the launcher (4). The upper end of the ammunition box (6) has a pin hole near the limiting plate (501) for connecting with the pin and the limiting plate (501) for linkage loading with the limiting plate (501).

9. A fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claim 8, characterized in that, The ammunition box (6) also includes a lifting plate (602), which is located at the bottom of the ammunition box (6). The lifting plate (602) has a limiting groove in the middle, which is used to cooperate with the positioning frame (701) of the fire extinguishing bomb (7) for limiting and fixing. The lifting plate (602) has threaded sleeves on both sides. The lifting mechanism (603) includes a screw moving structure and a screw motor. The screw moving structure is set perpendicular to the lifting plate (602) and is connected to the threaded sleeve for transmission. The rotating shaft of the screw motor is connected to the screw moving structure through a sprocket structure for driving the screw to rotate and lift the lifting plate (602).

10. A fire extinguishing projectile mounting and launching structure based on a rotary-wing UAV according to claim 9, characterized in that, The positioning frame (701) has a positioning block (702) on its inner side. The positioning block (702) is located inside the positioning frame (701) and is detachably connected to the positioning frame (701) by bolts. A magnet is fixed on one side of the positioning block (702). The magnet has an arc groove on one side for fixing and positioning the fire extinguishing bomb (7).

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