Unmanned helicopter folding spray assembly

Abstract

The present application relates to the technical field of unmanned agricultural aircraft spraying, and discloses a folding spraying assembly of an unmanned helicopter, which comprises a helicopter body, a base frame for supporting the helicopter body and a mounting frame, the base frame is fixedly installed at the lower end of the helicopter body, the mounting frame is fixedly connected to the top of the inner wall of the base frame on one side, a water spraying assembly for spraying is installed on the top of the inner wall of the base frame, and two tensioning assemblies for improving the stability of the water spraying assembly are installed in the base frame, the folding storage of the supporting rod is realized through motor driving, collision damage of the supporting rod in a non-working state is effectively avoided, safety and service life are improved, the tensioning assembly can automatically retract and release the steel cable along with the movement of the supporting rod, the best tensioning state is maintained at all times, vibration and drooping of the supporting rod are resisted, the stability of the supporting rod is enhanced and the load of the connecting point is reduced, and the supporting assembly automatically provides an additional fulcrum when the supporting rod is unfolded, so that the structural safety of the spraying operation is ensured.

Description

Technical Field

[0001] This invention relates to the field of agricultural drone spraying technology, specifically to a folding spraying assembly for unmanned helicopters. Background Technology

[0002] Unmanned helicopters are unmanned aerial vehicles that use rotors to provide lift and thrust, enabling them to take off and land vertically, hover in the air, and fly in any direction. Unmanned helicopter spraying technology utilizes unmanned helicopters as flight platforms, equipped with spraying equipment such as pesticide tanks, water pumps, and spray booms, to conduct precise spraying of pesticides, fertilizers, or herbicides in areas such as farmland, orchards, and forestry. This technology is mainly applied to large-scale farmland plant protection, forestry pest control in complex terrain, and efficient application of pesticides to tall crops. Its advantages include extremely high efficiency, far exceeding manual operations, strong terrain adaptability, no limitation by ground conditions, reduced risk of human contact with pesticides, and precise application, saving on pesticide costs.

[0003] The existing spray booms of unmanned helicopter spraying components are mostly fixed or simply foldable. Fixed spray booms, due to their non-adjustable structure, must remain extended during the relocation, transportation, and parking of the unmanned helicopter. In this state, the spray boom is prone to scraping or colliding with obstacles in the transport vehicle or parking environment, directly causing deformation of the spray boom body and damage to the nozzle. Such damage not only requires frequent replacement of parts, significantly increasing equipment maintenance costs, but also causes operation interruption due to maintenance downtime, reducing the effective operating time of the unmanned helicopter.

[0004] While the manual folding spray boom uses a hinge structure to fold and store, mitigating the risk of collisions during transport and parking, its unfolding and folding process relies on manual operation by ground staff. This increases the workload of ground staff, prolongs preparation time before and after unmanned helicopter operations, and directly reduces overall operational efficiency. Furthermore, manual operation depends on personnel experience, and operational errors can easily cause the spray boom to loosen during flight operations, or even detach, affecting spraying accuracy and posing a threat to the flight safety of the unmanned helicopter. Therefore, we propose a folding spraying component for unmanned helicopters. Summary of the Invention

[0005] The purpose of this invention is to provide a folding spraying assembly for unmanned helicopters to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a folding spraying assembly for an unmanned helicopter, comprising a helicopter body, a base frame for supporting the helicopter body, and a mounting frame. The base frame is fixedly installed at the lower end of the helicopter body, and the mounting frame is fixedly connected to the top side of the inner wall of the base frame. A water spraying assembly for spraying is installed at the top of the inner wall of the base frame. Two tensioning components for improving the stability of the water spraying assembly are installed inside the base frame, and the two tensioning components are symmetrically arranged. Two support components for supporting the water spraying assembly are installed on the side wall of the mounting frame, and the two support components are symmetrically arranged.

[0007] Preferably, the water spray assembly includes a water storage tank, a motor, and a working trough. The water storage tank is fixedly connected to the top of the inner wall of the base frame, the motor is fixedly connected to the lower side of one side of the mounting frame, and the working trough is located on the lower side of the mounting frame near the water storage tank. Rotating openings are provided on both upper sides of the inner wall of the working trough, and two symmetrically arranged support rods are rotatably connected to the top of the inner wall of the working trough. The two support rods are respectively rotatably arranged in the two rotating openings.

[0008] Preferably, a transmission rod is rotatably connected to the lower part of the inner wall of the working groove. The output end of the motor passes through the mounting bracket and is fixedly connected to one end of the transmission rod. Worms are fixedly sleeved on both sides of the outer side of the transmission rod. The two worms have opposite directions of rotation. Worm wheels are fixedly connected to the lower ends of the two support rods. The two worm wheels have opposite directions of rotation. The lower ends of the two worm wheels are rotatably connected to the bottom of the inner wall of the working groove. The two worms mesh with the two worm wheels respectively.

[0009] Preferably, a set of spray heads is fixedly connected to the lower ends of both support rods. A water pump is fixedly installed on the side of the water storage tank near the mounting frame. The pump's suction end is connected to the inside of the water storage tank, and the pump's discharge end is connected to a T-pipe. Both output ends of the T-pipe are connected to flexible hoses. The input ends of the two sets of spray heads pass through the two support rods respectively, and both sets of spray heads are connected to water supply pipes. The output ends of the two flexible hoses are respectively connected to the output ends of the two water supply pipes.

[0010] Preferably, the tensioning assembly includes a rotating rod, a crank block, a first spur gear, a connecting plate, and a connecting block. The rotating rod is rotatably connected to one side of the inner wall of the base frame, and one end of the rotating rod passes through the base frame. The crank block and the first spur gear are both rotatably connected to one side of the upper end of the mounting frame. The output end of the crank block passes through the mounting frame and is fixedly connected to the upper end of the support rod. The connecting plate is fixedly connected to the side wall of the base frame, and the connecting block is fixedly connected to the middle of the support rod near the water storage tank.

[0011] Preferably, a take-up roller is fixedly sleeved on one side of the outside of the rotating rod, a wire frame is rotatably sleeved on one side of the outside of the rotating rod, a steel cable is sleeved on the outside of the take-up roller, the steel cable is sleeved inside the wire frame, an arc-shaped rack is fixedly connected to the outside of the crank block, the arc-shaped rack meshes with a first spur gear, and a first bevel gear is fixedly connected to the upper end of the first spur gear.

[0012] Preferably, a rotating shaft is rotatably sleeved in the middle of the connecting plate, and a second bevel gear is fixedly connected to one end of the rotating shaft. The first and second bevel gears mesh with each other. A chain drive assembly is provided between the rotating shaft and the rotating rod. A fixed frame is rotatably connected to the upper end of the connecting block, and one end of the steel cable is sleeved in the fixed frame.

[0013] Preferably, the support assembly includes a guide rail, a third bevel gear, a fourth bevel gear, a second spur gear, and a support frame. The guide rail is fixedly connected to the lower part of the mounting frame away from the water storage tank. The third bevel gear is fixedly sleeved on the outer side of the transmission rod. The fourth bevel gear is rotatably connected to one side of the inner wall of the working groove. The third and fourth bevel gears mesh with each other. The second spur gear is rotatably connected to the lower part of the mounting frame away from the water storage tank. The output end of the second spur gear passes through the mounting frame and is fixedly connected to one end of the fourth bevel gear. The support frame is fixedly connected to one side of the support rod.

[0014] Preferably, a support rod is slidably connected inside the guide rail, and a spur rack is fixedly connected to one side of the upper end of the support rod, with the spur rack and the second spur gear meshing with each other.

[0015] Preferably, a guide groove is provided on one side of the mounting frame, a guide block is fixedly connected to one side of the support rod, the guide block is slidably connected in the guide groove, two guide tube frames are fixedly connected to the upper part of one side of the mounting frame, the two telescopic hoses are respectively sleeved in the two guide tube frames, and a support plate is fixedly connected to both sides of the base frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] Driven by a motor, the support rod with a set of water nozzles can rotate around a pivot point, switching between working and non-working states. When not spraying, the support rod can be folded and retracted to both sides of the helicopter body, effectively preventing accidental collisions or damage to the water spray assembly due to exposure in the non-operating state. This reduces the risk of the water spray assembly scraping against obstacles during takeoff, landing, movement, or parking, improving the safety and service life of the water spray assembly. When the support rod is extended, the distance between the support rod and the working slot increases, and the tensioning assembly automatically and synchronously releases a section of steel cable. Similarly, when the support rod is folded and retracted, the tensioning assembly automatically and synchronously retracts a section of steel cable. This design avoids overly tight or completely slack steel cables, ensuring they are always under good tension. The consistently taut cable applies a continuous pulling force to the support rod, effectively counteracting vibrations and sagging during operation. This significantly improves the overall stability of the water spray assembly during flight, while also reducing stress at the connection between the support rod and the working trough, extending the device's lifespan. Furthermore, when the support rod is extended to the working position, the support rod extends from the guide rail and slides under the support frame, forming a solid physical support platform. This provides an additional fulcrum for the support rod, significantly reducing bending caused by its own weight and the weight of the water pipe, ensuring structural safety during spraying operations. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of the folding spraying assembly for an unmanned helicopter;

[0019] Figure 2 This is a schematic diagram of the main structure of the present invention from another perspective;

[0020] Figure 3 This is a schematic diagram of the structure of the support rod after it has been unfolded according to the present invention;

[0021] Figure 4 This is a schematic diagram of the support rod of the present invention from another perspective after it has been unfolded;

[0022] Figure 5 This is a schematic diagram of the water spray assembly structure of the present invention;

[0023] Figure 6 This is an exploded view of the water spray component structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the rotating rod structure of the present invention;

[0025] Figure 8 This is an exploded view of the tensioning component structure of the present invention;

[0026] Figure 9 This is a structural breakdown diagram of the supporting components of the present invention;

[0027] Figure 10This is a schematic diagram of the support rod and straight rack structure of the present invention.

[0028] In the diagram: 1. Helicopter body; 2. Base frame; 3. Mounting bracket; 4. Water spray assembly; 401. Water tank; 402. Motor; 403. Working slot; 404. Rotating port; 405. Support rod; 406. Transmission rod; 407. Worm gear; 408. Worm wheel; 409. Water nozzle; 410. Water pump; 411. T-joint; 412. Telescopic hose; 413. Water supply pipe; 5. Tensioning assembly; 501. Rotating rod; 502. Crank block; 503. First spur gear; 504. Connecting plate; 50 5. Connecting block; 506. Take-up roller; 507. Guide frame; 508. Steel cable; 509. Arc rack; 510. First bevel gear; 511. Rotating shaft; 512. Second bevel gear; 513. Chain drive assembly; 514. Fixing frame; 6. Support assembly; 601. Guide rail; 602. Third bevel gear; 603. Fourth bevel gear; 604. Second spur gear; 605. Support frame; 606. Support rod; 607. Spur rack; 7. Guide groove; 8. Guide block; 9. Guide frame; 10. Support plate. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-10 As shown, the present invention provides a technical solution: an unmanned helicopter folding spraying assembly, including a helicopter body 1, a base frame 2 for supporting the helicopter body 1, and a mounting frame 3. The base frame 2 is fixedly installed at the lower end of the helicopter body 1, and the mounting frame 3 is fixedly connected to the top of the inner wall of the base frame 2 on one side. A water spraying assembly 4 for spraying is installed on the top of the inner wall of the base frame 2. Two tensioning assemblies 5 for improving the stability of the water spraying assembly 4 are installed inside the base frame 2, and the two tensioning assemblies 5 are symmetrically arranged. Two support assemblies 6 for supporting the water spraying assembly 4 are installed on the side wall of the mounting frame 3, and the two support assemblies 6 are symmetrically arranged.

[0031] Furthermore, when not spraying, the water spray assembly 4 can be folded and stowed to both sides of the helicopter body 1, effectively preventing accidental collisions or damage caused by the water spray assembly 4 being exposed when not in operation. This reduces the risk of scratching obstacles during takeoff, landing, movement, or parking, improving the safety and service life of the water spray assembly 4. When the water spray assembly 4 is unfolded, the tensioning assembly 5 can automatically extend synchronously. Similarly, when the water spray assembly 4 is folded and stowed, the tensioning assembly 5 can automatically stow synchronously, preventing the tensioning assembly 5 from being too tight or completely loose. The tensioning component 5 is always in a good tension state, and it can apply a continuous tension to the water spray component 4, effectively counteracting the vibration and sagging force generated during operation. This greatly improves the overall stability of the water spray component 4 during the flight of the helicopter body 1. When the water spray component 4 is deployed to the working position, the support component 6 moves to the bottom of the water spray component 4, forming a solid physical support platform. This provides an additional fulcrum for the water spray component 4, significantly reducing the bending of the water spray component 4 and ensuring the structural safety of the spraying operation.

[0032] It is worth noting that the helicopter body 1 is existing technology. As the core carrier platform of the entire device, the helicopter body 1 mainly consists of the main rotor and tail rotor system that provide lift and thrust, the electric motor that provides power, the flight control system that receives commands and controls flight, and the fuselage structure for installing various mission payloads. Its working principle is to precisely adjust the speed and pitch of each rotor through the flight controller, thereby generating the required lift, thrust and torque, realizing all flight attitudes of the aircraft such as vertical take-off and landing, hovering, forward flight, backward flight and turning, and providing a stable flight platform, power supply and installation foundation for the water spray assembly 4 installed on the lower base frame 2, ensuring that the water spray assembly 4 can work efficiently and stably under complex flight conditions.

[0033] In the preferred embodiment of this technical solution, please refer to Figures 5-6As shown, the water spray assembly 4 includes a water tank 401, a motor 402, and a working trough 403. The water tank 401 is fixedly connected to the top of the inner wall of the base frame 2. The motor 402 is fixedly connected to the lower side of one side of the mounting frame 3. The working trough 403 is located on the lower side of the mounting frame 3 near the water tank 401. Rotating openings 404 are provided on both upper sides of the inner wall of the working trough 403. Two symmetrically arranged support rods 405 are rotatably connected to the top of the inner wall of the working trough 403. The two support rods 405 are rotatably positioned within the two rotating openings 404 respectively. A transmission rod 406 is rotatably connected to the lower part of the inner wall of the groove 403. The output end of the motor 402 passes through the mounting bracket 3 and is fixedly connected to one end of the transmission rod 406. Worms 407 are fixedly sleeved on both sides of the outer side of the transmission rod 406. The two worms 407 have opposite rotation directions. The lower ends of the two support rods 405 are fixedly connected to worm wheels 408. The two worm wheels 408 have opposite rotation directions. The lower ends of the two worm wheels 408 are rotatably connected to the bottom of the inner wall of the working groove 403. The two worms 407 and the two worm wheels 408 mesh with each other.

[0034] Furthermore, when spraying is required, the motor 402 drives the transmission rod 406 to rotate, which in turn rotates the two worm gears 407 with opposite directions of rotation. The worm gears 407 drive the meshing worm wheel 408, which in turn drives the support rod 405 to rotate around the rotation connection point between the support rod 405 and the top of the inner wall of the working groove 403. This allows the support rod 405 to unfold. The mechanical self-locking characteristics of the worm wheel 408 and the worm gears 407 ensure that the support rod 405 remains in the designated position after unfolding, preventing it from rotating. When spraying is not in operation, the motor 402 reverses, and the support rod 405 is pressed tightly against both sides of the helicopter body 1. This greatly reduces the overall size of the device and effectively reduces the risk of the exposed support rod 405 scraping against obstacles during takeoff, landing, movement, or parking of the helicopter body 1, thus reducing maintenance costs and downtime caused by collisions.

[0035] In the preferred embodiment of this technical solution, please refer to Figures 5-6 As shown, a set of spray heads 409 are fixedly connected to the lower ends of the two support rods 405. A water pump 410 is fixedly installed on the side of the water storage tank 401 near the mounting bracket 3. The pumping end of the water pump 410 is connected to the inside of the water storage tank 401. The draining end of the water pump 410 is connected to a three-way pipe 411. Both output ends of the three-way pipe 411 are connected to telescopic hoses 412. The input ends of the two sets of spray heads 409 pass through the two support rods 405 respectively, and both input ends of the two sets of spray heads 409 are connected to water supply pipes 413. The output ends of the two telescopic hoses 412 are connected to the output ends of the two water supply pipes 413 respectively.

[0036] Furthermore, during spraying, the water pump 410 draws water from the water storage tank 401, and the water is discharged through the drain end of the water pump 410 into the three-way pipe 411 for diversion. The water then flows through two independent telescopic hoses 412 to the water supply pipes 413 inside the two support rods 405, and is finally sprayed out by the spray head 409 group fixed to the lower end of the support rod 405, thus realizing the spraying operation. By using the flexible connector 412, the water connection between the fixed water pump 410 and the rotatable and foldable support rod 405 is solved, ensuring... To ensure the water path remains unobstructed and is not pulled, twisted, or damaged during the entire process of unfolding or folding the support rod 405, thus guaranteeing the reliability of the spraying function, a water injection pipe is connected to the upper side of one side of the water tank 401, and a drain pipe is connected to the lower side of one side of the water tank 401. A solenoid valve is installed in the drain pipe. The water injection pipe is used to add water to the inside of the water tank 401, and the drain pipe is used to discharge the residual sewage and cleaning fluid in the water tank 401. The solenoid valve is used to control the opening and closing of the drain pipe.

[0037] In the preferred embodiment of this technical solution, please refer to Figures 7-8 As shown, the tensioning assembly 5 includes a rotating rod 501, a crank block 502, a first spur gear 503, a connecting plate 504, and a connecting block 505. The rotating rod 501 is rotatably connected to one side of the inner wall of the base frame 2, and one end of the rotating rod 501 passes through the base frame 2. The crank block 502 and the first spur gear 503 are both rotatably connected to one side of the upper end of the mounting frame 3. The output end of the crank block 502 passes through the mounting frame 3, and the output end of the crank block 502 is fixedly connected to the upper end of the support rod 405. The connecting plate 504 is fixedly connected to the side wall of the base frame 2. The connecting block 505 is fixedly connected to the middle of the support rod 405 near the water storage tank 401. A winding roller 506 is fixedly sleeved on one side of the rotating rod 501. The moving sleeve is equipped with a conductor frame 507, and a steel cable 508 is sleeved on the outside of the take-up roller 506. The steel cable 508 is sleeved inside the conductor frame 507. An arc-shaped rack 509 is fixedly connected to the outside of the crank block 502. The arc-shaped rack 509 and the first spur gear 503 mesh with each other. A first bevel gear 510 is fixedly connected to the upper end of the first spur gear 503. A rotating shaft 511 is rotatably sleeved in the middle of the connecting plate 504. A second bevel gear 512 is fixedly connected to one end of the rotating shaft 511. The first bevel gear 510 and the second bevel gear 512 mesh with each other. A chain drive assembly 513 is provided between the rotating shaft 511 and the rotating rod 501. A fixed frame 514 is rotatably connected to the upper end of the connecting block 505. One end of the steel cable 508 is sleeved in the fixed frame 514.

[0038] Furthermore, when the support rod 405 is extended or retracted, it drives the crank block 502 to rotate. The arc-shaped rack 509 on the crank block 502 drives the first spur gear 503 to rotate. The crank block 502 is a quarter-circle arc shape. When the support rod 405 is extended or retracted, the arc-shaped rack 509 is always meshed with the first spur gear 503. The first spur gear 503 meshes with the second bevel gear 512 through the first bevel gear 510, thereby causing the rotating shaft 511 to rotate. The chain drive assembly 513 includes two sprockets and a chain, with the chain sleeved on the two sprockets. Outside the wheel, two sprockets are fixedly connected to one end of the rotating shaft 511 and the rotating rod 501, respectively. When one sprocket rotates, the other sprocket will also rotate with the help of the chain, thus completing the power transmission. Therefore, the rotating shaft 511 transmits power to the rotating rod 501 through the chain drive assembly 513. The winding roller 506 on the rotating rod 501 then begins to wind up and unwind the steel cable 508. When the support rod 405 unfolds, the distance between the connection point of the support rod 405 and the working groove 403 increases. At this time, the winding roller 506 can automatically and synchronously unwind a section of the steel cable 508, so that the steel cable... Cable 508 is always taut. The taut steel cable 508 can apply a continuous upward pulling force to the unfolded support rod 405. This pulling force can effectively counteract the vibration generated during flight and operation, as well as the sag of the spray boom itself, greatly improving the overall rigidity and stability of the support rod 405 during flight. Similarly, when the support rod 405 is folded and stored, the distance between the connection point of the support rod 405 and the working groove 403 becomes closer. At this time, the steel cable 508 will become loose, and the rewind roller 506 can automatically and synchronously retract a section of the steel cable 508 after reversing, so that after the support rod 405 is stored, the steel cable... 508 remains taut, allowing the steel cable 508 to share most of the load, thus improving the stability of the support rod 405 after it is retracted. It also reduces the stress at the connection between the support rod 405 and the working groove 403, improving structural reliability. Furthermore, the conductor frame 507 constrains and guides the movement path of the steel cable 508 through its internal channels, effectively preventing the steel cable 508 from detaching, getting stuck, or generating unnecessary friction with surrounding components during the retraction and extension process. This ensures the smooth and reliable feedback and follow-up process of the tensioning component 5 and significantly extends the service life of the steel cable 508.

[0039] In the preferred embodiment of this technical solution, please refer to Figures 9-10As shown, the support assembly 6 includes a guide rail 601, a third bevel gear 602, a fourth bevel gear 603, a second spur gear 604, and a support frame 605. The guide rail 601 is fixedly connected to the lower part of the mounting frame 3 away from the water storage tank 401. The third bevel gear 602 is fixedly sleeved on the outer side of the transmission rod 406. The fourth bevel gear 603 is rotatably connected to one side of the inner wall of the working groove 403. The third bevel gear 602 and the fourth bevel gear 603 mesh with each other. The second spur gear 604 is rotatably connected to the lower part of the mounting frame 3 away from the water storage tank 401. The output end of the second spur gear 604 passes through the mounting frame 3 and is fixedly connected to one end of the fourth bevel gear 603. The support frame 605 is fixedly connected to one side of the support rod 405. A support rod 606 is slidably connected inside the guide rail 601. A spur rack 607 is fixedly connected to one side of the upper end of the support rod 606. The spur rack 607 and the second spur gear 604 mesh with each other.

[0040] Furthermore, when the support rod 405 is extended, the transmission rod 406 rotates, and the third bevel gear 602 outside the transmission rod 406 drives the fourth bevel gear 603, which meshes with the third bevel gear 602, to rotate. The second spur gear 604 then rotates, and the rack 607, which meshes with the second spur gear 604, generates linear motion, pushing the support rod 606, which is fixedly connected to the rack 607, to extend out of the guide rail 601. When the support rod 405 is extended to the working position, the support rod 606 extends and slides onto the support rod 405. Below the support frame 605, a solid additional physical fulcrum is provided for the support frame 605, which greatly enhances the bending resistance and overall structural stability of the support rod 405 during operation, effectively preventing deformation caused by weight and vibration. Similarly, when the support rod 405 is stored, the two support rods 606 move into the guide rail 601, avoiding the risk of the exposed support rods 606 becoming new protruding obstacles and scraping or colliding with other objects during storage or transportation, and protecting the support rods 606 from damage by accidental impact.

[0041] In the preferred embodiment of this technical solution, please refer to Figure 5 , Figure 8 , Figure 9 and Figure 10 As shown, a guide groove 7 is provided on one side of the mounting frame 3, and a guide block 8 is fixedly connected to one side of the support rod 606. The guide block 8 is slidably connected in the guide groove 7. Two guide tube frames 9 are fixedly connected to the upper part of one side of the mounting frame 3, and two telescopic hoses 412 are respectively sleeved in the two guide tube frames 9. Support plates 10 are fixedly connected to both sides of the base frame 2.

[0042] Furthermore, the sliding fit between the guide groove 7 and the guide block 8 provides radial constraint for the movement of the support rod 606, ensuring that the support rod 606 can extend and retract smoothly only in the straight direction without deviation or dislocation. The guide frame 9 organizes, fixes and protects the telescopic hose 412, preventing it from rubbing, tangling or excessively bending with other components during repeated movement, thereby effectively extending the service life of the telescopic hose 412 and ensuring the smooth flow of water. The support plates 10 fixed on both sides of the base frame 2 provide a reliable parking platform for the support rod 405 after it is folded and stored, ensuring the stability and safety of the support rod 405 in the stored state.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An unmanned helicopter folding spraying assembly, comprising a helicopter body (1), a base frame (2) for supporting the helicopter body (1), and a mounting frame (3), characterized in that: The base frame (2) is fixedly installed at the lower end of the helicopter body (1). The mounting frame (3) is fixedly connected to the top of the inner wall of the base frame (2) on one side. A water spraying assembly (4) for spraying is installed on the top of the inner wall of the base frame (2). Two tensioning assemblies (5) for improving the stability of the water spraying assembly (4) are installed inside the base frame (2), and the two tensioning assemblies (5) are symmetrically arranged. Two support assemblies (6) for supporting the water spraying assembly (4) are installed on the side wall of the mounting frame (3), and the two support assemblies (6) are symmetrically arranged. When not spraying, the water spray assembly (4) is folded and retracted to both sides of the helicopter body (1); When spraying, the water spraying assembly (4) extends outward from both sides of the helicopter body (1); When the water spray assembly (4) is folded or unfolded, the movement of the water spray assembly (4) synchronously drives the steel cables of the two tensioning assemblies (5) to automatically retract or extend, so that the tensioning assemblies (5) are in a tensioned state, applying a continuous pulling force to the water spray assembly (4). When the water spray assembly (4) is unfolded, it also synchronously drives the two support assemblies (6) to move to the bottom of the water spray assembly (4), forming a solid physical support platform.

2. The unmanned helicopter folding spraying assembly according to claim 1, characterized in that: The water spray assembly (4) includes a water tank (401), a motor (402), and a working trough (403). The water tank (401) is fixedly connected to the top of the inner wall of the base frame (2). The motor (402) is fixedly connected to the lower side of the mounting frame (3). The working trough (403) is opened on the lower side of the mounting frame (3) near the water tank (401). Rotating openings (404) are opened on both sides of the upper part of the inner wall of the working trough (403). Two symmetrically arranged support rods (405) are rotatably connected to the top of the inner wall of the working trough (403). The two support rods (405) are respectively rotatably arranged in the two rotating openings (404).

3. The unmanned helicopter folding spraying assembly according to claim 2, characterized in that: A transmission rod (406) is rotatably connected to the lower part of the inner wall of the working groove (403). The output end of the motor (402) passes through the mounting bracket (3) and is fixedly connected to one end of the transmission rod (406). Worms (407) are fixedly sleeved on both sides of the outer side of the transmission rod (406). The two worms (407) have opposite rotation directions. The lower ends of the two support rods (405) are fixedly connected to worm wheels (408). The two worm wheels (408) have opposite rotation directions. The lower ends of the two worm wheels (408) are rotatably connected to the bottom of the inner wall of the working groove (403). The two worms (407) mesh with the two worm wheels (408) respectively.

4. The unmanned helicopter folding spraying assembly according to claim 2, characterized in that: A set of spray heads (409) is fixedly connected to the lower end of each of the two support rods (405). A water pump (410) is fixedly installed on the side of the water storage tank (401) near the mounting frame (3). The pumping end of the water pump (410) is connected to the inside of the water storage tank (401). The draining end of the water pump (410) is connected to a three-way pipe (411). Both output ends of the three-way pipe (411) are connected to a telescopic hose (412). The input ends of the two sets of spray heads (409) pass through the two support rods (405) respectively. The input ends of the two sets of spray heads (409) are connected to a water supply pipe (413). The output ends of the two telescopic hoses (412) are connected to the output ends of the two water supply pipes (413) respectively.

5. The unmanned helicopter folding spraying assembly according to claim 2, characterized in that: The tensioning assembly (5) includes a rotating rod (501), a crank block (502), a first spur gear (503), a connecting plate (504), and a connecting block (505). The rotating rod (501) is rotatably connected to one side of the inner wall of the base frame (2), and one end of the rotating rod (501) passes through the base frame (2). The crank block (502) and the first spur gear (503) are both rotatably connected to one side of the upper end of the mounting frame (3). The output end of the crank block (502) passes through the mounting frame (3), and the output end of the crank block (502) is fixedly connected to the upper end of the support rod (405). The connecting plate (504) is fixedly connected to the side wall of the base frame (2), and the connecting block (505) is fixedly connected to the middle of the support rod (405) near the water storage tank (401).

6. The unmanned helicopter folding spraying assembly according to claim 5, characterized in that: A take-up roller (506) is fixedly sleeved on one side of the outside of the rotating rod (501). A wire frame (507) is rotatably sleeved on one side of the outside of the rotating rod (501). A steel cable (508) is sleeved on the outside of the take-up roller (506). The steel cable (508) is sleeved inside the wire frame (507). An arc-shaped rack (509) is fixedly connected to the outside of the crank block (502). The arc-shaped rack (509) and the first spur gear (503) mesh with each other. A first bevel gear (510) is fixedly connected to the upper end of the first spur gear (503).

7. The unmanned helicopter folding spraying assembly according to claim 6, characterized in that: A rotating shaft (511) is rotatably sleeved in the middle of the connecting plate (504). A second bevel gear (512) is fixedly connected to one end of the rotating shaft (511). The first bevel gear (510) and the second bevel gear (512) mesh with each other. A chain drive assembly (513) is provided between the rotating shaft (511) and the rotating rod (501). A fixed frame (514) is rotatably connected to the upper end of the connecting block (505). One end of the steel cable (508) is sleeved in the fixed frame (514).

8. The unmanned helicopter folding spraying assembly according to claim 4, characterized in that: The support assembly (6) includes a guide rail (601), a third bevel gear (602), a fourth bevel gear (603), a second spur gear (604), and a support frame (605). The guide rail (601) is fixedly connected to the mounting frame (3) on the lower side away from the water storage tank (401). The third bevel gear (602) is fixedly sleeved on the outside of the transmission rod (406) on one side. The fourth bevel gear (603) is rotatably connected to one side of the inner wall of the working groove (403). The third bevel gear (602) and the fourth bevel gear (603) mesh with each other. The second spur gear (604) is rotatably connected to the mounting frame (3) on the lower side away from the water storage tank (401). The output end of the second spur gear (604) passes through the mounting frame (3), and the output end of the second spur gear (604) is fixedly connected to one end of the fourth bevel gear (603). The support frame (605) is fixedly connected to one side of the support rod (405).

9. The unmanned helicopter folding spraying assembly according to claim 8, characterized in that: A support rod (606) is slidably connected inside the guide rail (601), and a spur rack (607) is fixedly connected to one side of the upper end of the support rod (606). The spur rack (607) meshes with the second spur gear (604).

10. The unmanned helicopter folding spraying assembly according to claim 9, characterized in that: The mounting bracket (3) has a guide groove (7) on one side, and a guide block (8) is fixedly connected to one side of the support rod (606). The guide block (8) is slidably connected in the guide groove (7). Two guide tube frames (9) are fixedly connected to the upper side of one side of the mounting bracket (3). Two telescopic hoses (412) are respectively fitted in the two guide tube frames (9). The base frame (2) has a support plate (10) fixedly connected to both sides.

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