Multi-rotor fire extinguishing bomb throwing unmanned aerial vehicle

Abstract

This invention relates to the field of drone fire extinguishing bomb throwing technology, and discloses a multi-rotor fire extinguishing bomb throwing drone. The invention includes a drone body, on which one or more guide tubes for placing fire extinguishing bombs are fixedly mounted. A throwing baffle is disposed below the guide tubes. A control component corresponding to the throwing baffle is mounted on one of the landing gears. The control component includes a mechanical elastic limiting structure and an electronic drive structure. An electromagnetic lock is fixedly mounted on the lower side wall of the guide tube, and a locking block corresponding to the electromagnetic lock is fixedly mounted on the throwing baffle. This invention releases the restriction on the fire extinguishing bombs by rotating the throwing baffle, avoiding the possibility of the fire extinguishing bombs getting stuck when it is opened downwards. The dual mechanical and electronic control structure further prevents the throwing baffle from getting stuck and unable to open. Furthermore, an auxiliary pushing structure is provided on the guide tube for fast and stable throwing of the fire extinguishing bombs.

Description

Technical Field

[0001] This invention relates to the field of drone fire extinguishing bomb throwing technology, and in particular to a multi-rotor fire extinguishing bomb throwing drone. Background Technology

[0002] Multi-rotor drones are special unmanned rotary-wing aircraft with three or more rotor shafts. Fire extinguishing bombs come in several forms: one type involves the bomb being thrown into the fire, where the high temperature causes it to explode and spray extinguishing agent; another type contains an explosive device that senses the bomb's altitude after being dropped from a height, detonating automatically at a certain point above the ground, thus expanding the extinguishing agent's spray range. Current technology often uses drones to carry fire extinguishing bombs for aerial delivery. Multi-rotor platforms, equipped with dedicated fire extinguishing bombs and delivery mechanisms, enable contactless, precise, and rapid initial fire suppression, making them particularly suitable for scenarios difficult to reach using traditional methods, such as high-rise buildings, forests, and confined spaces.

[0003] Currently, there are three types of fire extinguishing bombs: vertical drop, magazine-type, and launch tube-type. Among them, the vertical drop type is more commonly used because it has the advantages of high accuracy and suitability for fixed-point delivery. However, this type of drop also has some shortcomings. The general structure uses a hook on the fuselage to suspend the fire extinguishing bomb. However, because the fire extinguishing bomb needs to be suspended at the bottom of the drone, the overall height of the drone is greater than the length of the fire extinguishing bomb. This requires a longer landing gear, which results in a lower center of gravity for the drone and poor maneuverability. At the same time, since the fire extinguishing bomb is usually suspended from the top, it is easy for the center of gravity of the fire extinguishing bomb to become unstable and sway in the air during the drop. After the fire extinguishing bomb is dropped, its attitude is unstable, which reduces the accuracy of the drop and the fire extinguishing effect. Chinese patent application CN202311189960.2 discloses a multi-rotor fire extinguishing bomb delivery drone, comprising a drone fuselage and multiple arms arranged around the fuselage. A propeller is mounted on the end of each arm furthest from the fuselage. Landing frames are connected to the lower surface of the fuselage. One or more guide tubes for placing fire extinguishing bombs are fixedly mounted on the fuselage. The guide tubes extend vertically, with the upper part extending above the fuselage and the lower part extending below the fuselage. A delivery device is located below the guide tubes. The throwing baffle is mounted on one side of the landing gear. When locked and laid flat, the throwing baffle supports the fire extinguishing bombs. When unlocked and flipped down, it is used to throw the fire extinguishing bombs. The drone's guide tube design avoids the need for a long landing gear and the swaying of the fire extinguishing bombs. However, it achieves a blocking effect through the throwing baffle. After unlocking, the throwing baffle flips down and opens using itself and the gravity of the fire extinguishing bombs to throw them. The single control structure may get stuck, and the way it flips down can easily interfere with the throwing of the fire extinguishing bombs.

[0004] To address these issues, we propose a multi-rotor fire extinguishing bomb delivery drone. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a multi-rotor fire extinguishing bomb throwing drone.

[0006] The present invention is achieved by the following technical solution: a drone body, wherein two tripods are symmetrically arranged on the lower end of the drone body, and a partition is provided in the middle of the drone body and fixed by four fixed rods for setting up the subsequent throwing structure; one or more guide tubes for placing fire extinguishing bombs are fixedly arranged on the drone body, the guide tubes are arranged in the gap in the middle of the drone body, the guide tubes are vertically continuous and the upper part extends to the top of the drone body, and the lower part of the guide tube extends to the bottom of the drone body. A throwing baffle is provided below the guide cylinder, and the throwing baffle corresponds to the lower opening of the guide cylinder. A control component corresponding to the throwing baffle is provided on one of the legs. The control component includes a control arm fixedly connected to the throwing baffle. A base is fixedly provided on one of the legs. The lower end of the base is cylindrical and has a circular slot. A rotating shaft is rotatably provided in the circular slot. One end of the rotating shaft extends out of the circular slot and is fixedly connected to the control arm. The control component is provided with a mechanical elastic limiting structure and an electronic drive structure. An electromagnetic lock is fixedly installed on the lower side wall of the guide cylinder, and a locking block corresponding to the electromagnetic lock is fixedly installed on the throwing baffle.

[0007] As a further improvement to the above solution, two connectors are fitted on the guide cylinder. Two connecting blocks are symmetrically arranged on both sides of the connector, and the connecting blocks are provided with symmetrical threaded holes. One of the guide cylinders is fixed on four fixed rods, and adjacent guide cylinders are fixed by a threaded structure.

[0008] As a further improvement to the above solution, the mechanical elastic limiting structure includes an annular slot on the inner wall of the circular slot, a torsion spring is provided in the annular slot, the torsion spring is sleeved on the rotating shaft and elastically limits it, and the electronic drive structure includes a cavity in the base corresponding to the circular slot, a micro motor is fixedly installed in the cavity, the output end of the micro motor is coaxially fixedly connected to a moving magnetic rotor, and a driven rotor is fixedly provided on the upper end of the rotating shaft corresponding to the moving magnetic rotor.

[0009] As a further improvement to the above scheme, two limiting short posts are centrally symmetrically arranged on the side wall of the rotating shaft, and an arc-shaped groove matching the two limiting short posts is provided on the inner wall of the annular groove.

[0010] As a further improvement to the above solution, the inner wall of the guide cylinder is provided with a threaded groove and damping rubber is embedded in the threaded groove.

[0011] As a further improvement to the above solution, a cover is matched and provided on the upper end of the guide cylinder. One end of the cover is rotatably connected to the guide cylinder, and a locking structure is provided between the other end of the cover and the guide cylinder for locking. A soft pad is provided inside the cover, and the soft pad is fixedly connected to the cover by a limiting spring.

[0012] As a further improvement to the above solution, the end face of the throwing baffle facing the guide cylinder is polished smooth.

[0013] As a further improvement to the above solution, the leg is configured as a frame-shaped rod, the upper end of the base is provided with an arc-shaped slot and a matching arc-shaped limiting block is provided, the arc-shaped limiting block is fixed to the base by several bolts, the arc-shaped limiting block is fixedly provided with a limiting protrusion, and the leg is provided with several limiting grooves corresponding to the limiting protrusion.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The throwing accuracy is controllable and the fire extinguishing target is extremely strong. It can achieve a stable downward throwing attitude of the fire extinguishing bomb, thereby ensuring the throwing accuracy of the fire extinguishing bomb.

[0015] 2. Multiple anti-jamming designs: Addressing the pain points of jamming and accidental throwing in the downward-tilting throwing mechanism, this invention incorporates multiple anti-jamming optimizations. The guide tube's cover is equipped with a limit spring and soft pads to limit and secure the fire extinguishing bomb inside the guide tube, preventing it from swaying or shifting. It also provides a pushing effect during throwing, preventing jamming. The throwing baffle uses a rotating opening mechanism, eliminating the downward tilting action and avoiding potential interference with the fire extinguishing bomb during this process. The throwing baffle is dually controlled by a mechanical structure and an electronic control structure, ensuring rapid opening and preventing jamming.

[0016] 3. Modular quick-release design: The guide tube adopts a split modular structure, which can be disassembled and assembled as needed. Combined with the quick-release and quick-assembly base, different numbers of fire extinguishing bombs can be thrown at once as needed. Attached Figure Description

[0017] Figure 1 This is a front-view view of the multi-rotor fire extinguishing bomb delivery drone of the present invention; Figure 2 This is a rear-view view of the multi-rotor fire extinguishing bomb delivery drone of the present invention; Figure 3 This is a top-down view of the multi-rotor fire extinguishing bomb delivery drone of the present invention; Figure 4This is a structural diagram of the control components; Figure 5 This is a structural diagram showing the cap and its connecting components; Figure 6 A breakdown diagram of the control components; Figure 7 An exploded view of the control components; Figure 8 This is a cross-sectional view of the control component.

[0018] Explanation of key symbols: 100. UAV body; 101. Landing frame; 200. Guide tube; 201. Throwing baffle; 202. Control arm; 203. Base; 204. Rotating shaft; 205. Torsion spring; 206. Limiting short post; 207. Micro motor; 208. Moving magnetic rotor; 209. Driven rotor; 210. Cover; 211. Locking structure; 212. Soft pad block; 213. Limiting spring; 214. Connector; 215. Connecting block; 216. Electromagnetic lock; 217. Locking block; 218. Arc-shaped limiting block; 219. Limiting protrusion. Detailed Implementation

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0020] Please combine Figures 1 to 8A multi-rotor fire extinguishing bomb throwing drone includes: a drone body 100, with two landing gears 101 symmetrically mounted on the lower end of the drone body 100. This is the existing drone structure. The drone body 100 has a partition in the middle, secured by four fixing rods 102, for setting up the subsequent throwing structure. Because existing methods of suspending fire extinguishing bombs on drones typically involve suspending them at the bottom, requiring a long landing gear and a relatively high overall height, which can easily lead to instability during flight, the suspension position of the fire extinguishing bombs can be improved. Specifically, one or more guide tubes 200 for placing fire extinguishing bombs are fixedly mounted on the drone body 100, and the guide tubes 200 are arranged in the gaps between the drone body 100. The guide cylinder 200 is positioned to avoid existing defects. Therefore, the guide cylinder 200 is vertically continuous, with the upper part extending above the drone body and the lower part extending below the drone body. Multiple guide cylinders 200 should be symmetrical to ensure uniform stress on the drone body 100. In this invention, the overall length of the guide cylinder 200 is longer than the fire extinguishing bomb to be used, allowing it to fully accommodate the fire extinguishing bomb. Specifically, to install and fix multiple guide cylinders 200, two connectors 214 are fitted onto the guide cylinder 200. Two connecting blocks 215 are symmetrically arranged on both sides of the connectors 214, and the connecting blocks 215 have symmetrical threaded holes. One guide cylinder 200 is fixed to four fixing rods 102, and adjacent guide cylinders 200 can be fixed using a threaded structure.

[0021] A throwing baffle 201 is set below the guide tube 200, and the throwing baffle 201 corresponds to the lower opening of the guide tube 200. A control component corresponding to the throwing baffle 201 is set on one of the legs 101. When the throwing baffle 201 is placed below the guide tube 200, it can restrict the fire extinguishing bomb inside the guide tube 200, thereby completing the suspension of the fire extinguishing bomb. Compared with the existing suspension method, this suspension method has the advantages of firstly, because the guide tube 200 is set through the main body of the UAV 1, the lower end of the fire extinguishing bomb will not be too long when it is suspended. Therefore, the legs 101 on the main body of the UAV 1 do not need to be set to be too long. The center of gravity of the UAV is more stable when it takes off and the swaying of the fire extinguishing bomb can be avoided when it is suspended. When throwing is required, the throwing baffle 201 can be repositioned via a control component, thereby removing the limiting effect on the fire extinguishing bomb and allowing it to detach from the bottom of the guide tube 200 for throwing. Addressing the issue of jamming in existing limiting structures for the throwing baffle 201, this invention employs a dual control structure, consisting of a mechanical elastic limiting structure and an electronic drive structure, to simultaneously control the throwing baffle 201 to release its limiting effect on the fire extinguishing bomb. Furthermore, the current downward-tilting release mechanism is prone to interfering with the fire extinguishing bomb; therefore, a control arm 202 is fixedly connected to the throwing baffle 201. A base 203 is fixedly mounted on one of the legs 101, and the lower end of the base 203 is equipped with… The device is cylindrical and has a circular slot. A rotating shaft 204 is rotatably mounted inside the circular slot. One end of the rotating shaft 204 extends outside the circular slot and is fixedly connected to the control arm 202. The mechanical elastic limiting structure is configured as follows: an annular slot is provided on the inner wall of the circular slot, and a torsion spring 205 is provided in the annular slot. The torsion spring 205 is sleeved on the rotating shaft 204 and elastically limits it. Its main function is to drive the rotating shaft 204 to rotate, thereby releasing the limiting effect of the throwing baffle 201 on the fire extinguishing bomb. In order to limit the maximum rotation position of the throwing baffle 201, two limiting short posts 206 are symmetrically arranged on the side wall of the rotating shaft 204. An arc-shaped slot matching the two limiting short posts 206 is provided on the inner wall of the annular slot. The electronic drive structure also drives the rotating shaft 204 to rotate, and it can cooperate with the mechanical elastic limiting structure. The rotating shaft 204 can be driven to rotate by setting a motor structure. However, since the rotation range of the rotating shaft 204 is limited, in this invention, a cavity with a corresponding circular slot is provided in the base 203, and a micro motor 207 is fixedly installed in the cavity. The output end of the micro motor 207 is coaxially fixedly connected to the moving magnetic rotor 208. A driven rotor 209 is provided on the upper end of the rotating shaft 204 corresponding to the moving magnetic rotor 208. There is a magnetic coupling between the driven rotor 209 and the moving magnetic rotor 208. When it is necessary to throw the bomb, the micro motor 207 rotates, synchronously driving the moving magnetic rotor 208 to rotate. Through the magnetic coupling, the driven rotor 209 rotates, that is, the rotating shaft 204 rotates, thereby releasing the limiting effect of the throwing baffle 201 on the fire extinguishing bomb. The dual control structure and the lateral movement of the throwing baffle 201 minimize the probability of the fire extinguishing bomb getting stuck.

[0022] A dual mechanical and electronic structure is designed to prevent jamming, while also preventing the fire extinguishing bomb from easily detaching. This means that the throwing baffle 201 needs to maintain its limiting effect on the fire extinguishing bomb. Therefore, an electromagnetic lock 216 is fixedly installed on the lower side wall of the guide tube 200, and a locking block 217 corresponding to the electromagnetic lock 216 is fixedly installed on the throwing baffle 201. When not throwing, the electromagnetic lock 216 firmly locks the locking block 217, restricting the position of the throwing baffle 201, thereby limiting the fire extinguishing bomb within the guide tube 200.

[0023] To enable the base 203 to be fixed on the stand 101, and to allow the guide cylinders 200 to be installed in any number as needed, the base 203 is also designed as a detachable structure. The stand 101 is a frame-shaped rod. The upper end of the base 203 is provided with an arc-shaped slot and a matching arc-shaped limiting block 218. The arc-shaped limiting block 218 is fixed to the base 203 by several bolts. A limiting protrusion 219 is fixedly provided on the arc-shaped limiting block 218. The stand 101 is provided with several limiting grooves corresponding to the limiting protrusions 219, which can be installed according to the position and number of guide cylinders 200.

[0024] Although the guide tube 200 can prevent the fire extinguishing bomb from swaying due to the drone's flight, the fire extinguishing bomb will still be unstable in the air after being thrown. To avoid this, referring to the design of a bullet chamber, the inner wall of the guide tube 200 is provided with a threaded groove and damping rubber is embedded in the threaded groove. When the fire extinguishing bomb is thrown, it will rotate a certain amount due to the action of the threaded damping rubber, thus better maintaining its attitude in the air, increasing the throwing accuracy and fire extinguishing effect. In some embodiments of the present invention, adding a threaded structure can increase the throwing stability of the guide cylinder 200, but it also creates some obstruction during the throwing process. Therefore, a cap 210 is provided at the upper end of the guide cylinder 200. One end of the cap 210 is rotatably connected to the guide cylinder 200, and a locking structure 211 is provided between the other end of the cap 210 and the guide cylinder 200 for locking. When the fire extinguishing bomb is placed inside the guide cylinder 200, it can be sealed and protected by the cap 210. Simultaneously, to counteract the aforementioned threaded structure... To mitigate the obstruction of the structure, a soft pad 212 is provided inside the cover 210. The soft pad 212 is fixedly connected to the cover 210 via a limiting spring 213. When the cover 210 is closed, the soft pad 212 presses against the fire extinguishing bullet, while the limiting spring 213 is compressed. In this way, when the fire extinguishing bullet is released from its restraint and thrown, the limiting spring 213 can provide elastic force to assist in the throwing of the fire extinguishing bullet, further preventing jamming. The soft pad 212 also has a shock absorption effect, preventing the large reaction force of the limiting spring 213 from acting on the drone and causing flight instability.

[0025] The implementation principle of a multi-rotor fire extinguishing bomb throwing drone in this application embodiment is as follows: First, the fire extinguishing bomb is loaded. At this time, the throwing baffle 201 is located at the lower end of the guide tube 200. After the fire extinguishing bomb enters the guide tube 200, it is restricted inside by the throwing baffle 201. Then, the guide tube 200 is closed by the cover 210. At this time, the limit spring 213 is in a compressed state, and at the same time, the soft pad block 212 is pressed against the fire extinguishing bomb. In this state, the electromagnetic lock 216 cooperates with the locking block 217 to restrict the position of the throwing baffle 201, and the fire extinguishing bomb is loaded into the guide tube 200. When the main body of the drone 100 moves to the desired throwing position, the electromagnetic lock 216 releases its restriction on the locking block 217. At this time, the mechanical elastic limiting mechanism drives the rotating shaft 204 to rotate through the torsion spring 205, thereby driving the throwing baffle 201 to rotate quickly and move out of the position under the guide cylinder 200 through the control arm 202, releasing the restriction on the fire extinguishing bomb inside the guide cylinder 200. At the same time, the electronic drive structure drives the moving magnetic rotor 208 to rotate through the rotation of the micro motor 207. The moving magnetic rotor 208 drives the driven rotor 209 to rotate through magnetic coupling, thereby driving the rotating shaft 204 to rotate. The above two methods work together to better ensure that the throwing baffle 201 moves and releases its restriction, avoiding jamming.

[0026] The fire extinguishing bomb is released from its restraints and, under its own weight and the elastic force of the limiting spring 213, moves downwards and detaches from the guide tube 200. At the same time, it is affected by the internal thread structure of the guide tube 200, which causes it to rotate and is thrown towards the fire point.

[0027] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A multi-rotor fire extinguishing bomb delivery drone, comprising: The drone body (100) has two tripods (101) symmetrically arranged on its lower end. The drone body (100) is characterized by having a partition in the middle, which is fixed by four fixing rods (102) for setting up a subsequent throwing structure. One or more guide tubes (200) for placing fire extinguishing bombs are fixedly arranged on the drone body (100). The guide tubes (200) are arranged in the gap in the middle of the drone body (100), with the guide tubes (200) extending vertically and vertically, with the upper part extending above the drone body and the lower part extending below the drone body. A throwing baffle (201) is provided below the guide cylinder (200), and the throwing baffle (201) corresponds to the lower opening of the guide cylinder (200). A control component corresponding to the throwing baffle (201) is provided on one of the legs (101). The control component includes a control arm (202) fixedly connected to the throwing baffle (201). A base (203) is fixedly provided on one of the legs (101). The lower end of the base (203) is cylindrical and has a circular hole groove. A rotating shaft (204) is rotatably provided in the circular hole groove. One end of the rotating shaft (204) extends to the outside of the circular hole groove and is fixedly connected to the control arm (202). The control component is provided with a mechanical elastic limit structure and an electronic drive structure. An electromagnetic lock (216) is fixedly installed on the lower side wall of the guide tube (200), and a locking block (217) corresponding to the electromagnetic lock (216) is fixedly installed on the throwing baffle (201).

2. The multi-rotor fire extinguishing bomb delivery drone as described in claim 1, characterized in that, Two connectors (214) are fitted on the guide cylinder (200). Two connecting blocks (215) are symmetrically arranged on both sides of the connector (214) and symmetrical threaded holes are provided on the connecting blocks (215). One of the guide cylinders (200) is fixed on four fixing rods (102), and the adjacent guide cylinders (200) are fixed by a threaded structure.

3. The multi-rotor fire extinguishing bomb delivery drone as described in claim 1, characterized in that, The mechanical elastic limiting structure includes an annular slot on the inner wall of the circular slot, and a torsion spring (205) is provided in the annular slot. The torsion spring (205) is sleeved on the rotating shaft (204) and elastically limits it. The electronic drive structure includes a cavity in the base (203) corresponding to the circular slot. A micro motor (207) is fixedly installed in the cavity. The output end of the micro motor (207) is coaxially fixedly connected to a moving magnetic rotor (208). A driven rotor (209) is fixedly provided on the upper end of the rotating shaft (204) corresponding to the moving magnetic rotor (208).

4. The multi-rotor fire extinguishing bomb delivery drone as described in claim 3, characterized in that, Two limiting short posts (206) are centrally symmetrically arranged on the side wall of the rotating shaft (204), and an arc-shaped groove matching the two limiting short posts (206) is provided on the inner wall of the annular groove.

5. The multi-rotor fire extinguishing bomb delivery drone as described in claim 1, characterized in that, The inner wall of the guide cylinder (200) is provided with a threaded groove and a damping rubber is embedded in the threaded groove.

6. The multi-rotor fire extinguishing bomb delivery drone as described in claim 1, characterized in that, A cover (210) is matched and provided on the upper end of the guide cylinder (200). One end of the cover (210) is rotatably connected to the guide cylinder (200), and a locking structure (211) is provided between the other end of the cover (210) and the guide cylinder (200) for locking. A soft pad (212) is provided inside the cover (210), and the soft pad (212) is fixedly connected to the cover (210) by a limiting spring (213).

7. The multi-rotor fire extinguishing bomb delivery drone as described in claim 1, characterized in that, The end face of the throwing baffle (201) facing the guide cylinder (200) is polished smooth.

8. The multi-rotor fire extinguishing bomb delivery drone as described in claim 1, characterized in that, The stand (101) is configured as a frame rod, and the upper end of the base (203) is provided with an arc-shaped slot and a matching arc-shaped limiting block (218). The arc-shaped limiting block (218) is fixed to the base (203) by several bolts. A limiting protrusion (219) is fixedly provided on the arc-shaped limiting block (218), and the stand (101) is provided with several limiting grooves corresponding to the limiting protrusions (219).

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