Single motor driven fluid spraying device

Abstract

The application relates to the technical field of unmanned aerial vehicle fluid spraying, and discloses a single-motor-driven fluid spraying device, which comprises a speed reduction motor, a long light shaft, a driving bevel gear and two short parallel light shafts.The single-motor-driven fluid spraying device can efficiently decompose single-axis rotating power into two routes of vertical rotating power through the cooperation between the components, and the two short light shafts automatically obtain opposite rotating directions.This transmission mode omits the complex worm gear or multi-stage gear reversing mechanism in the traditional scheme, greatly simplifies the transmission chain, effectively improves the power transmission efficiency, significantly reduces the overall volume and weight of the device, reduces the noise and vibration in the transmission process, and enables the device to better adapt to the compact and light mounting requirements of the unmanned aerial vehicle.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) fluid spraying technology, specifically a single-motor driven fluid spraying device. Background Technology

[0002] With the rapid development of drone technology, drones equipped with fluid spraying devices have been widely used in various fields such as agricultural plant protection, urban building exterior wall cleaning, photovoltaic panel cleaning, and fire rescue. Dual-path fluid spraying structures have become the mainstream development direction for current drone spraying systems due to their ability to significantly improve spray coverage and operational efficiency. However, existing dual-path fluid spraying devices still suffer from many insurmountable technical defects in power transmission, synchronous control, and system integration, severely restricting their application in lightweight, long-endurance, and high-reliability drone operation scenarios. Existing dual-path fluid spraying devices typically require converting the horizontal rotational power of the motor into vertical oscillating power, and traditional reversing mechanisms have significant drawbacks. Worm gear reversing transmissions have low efficiency, generate significant heat, and are bulky; multi-stage gear transmissions have long transmission chains, large cumulative errors, and low reliability; complex reversing mechanisms occupy a large amount of installation space, hindering compact design; the reversing mechanism is heavy, increasing the burden on the drone; and multi-gear meshing generates high noise and poor stability, making it difficult to meet the requirements of lightweight, compact, and high-efficiency drones.

[0003] The synchronization of the two spray paths in existing dual-path fluid jet devices is generally poor. Most existing devices use independent motors to drive each nozzle separately. Due to differences in motor speed and transmission errors, it is difficult for the oscillation frequencies of the two nozzles to be synchronized. The lack of a mechanical synchronization mechanism leads to asynchronous oscillation phases, resulting in overlapping or missed sprays. Poor synchronization causes uneven spray distribution, with some areas wasted and others insufficiently cleaned. Reliance on real-time adjustments by electronic control systems increases system complexity and cost, directly affecting the quality of cleaning operations.

[0004] Existing dual-path jetting devices typically use two or more motors to drive the system separately, resulting in system complexity and high energy consumption. Each motor requires an independent power supply line, control circuit, and drive module, making the electrical system complex; simultaneous operation of multiple motors significantly increases power consumption, shortening the single-charge operation time of the drone; the increased number of motors leads to increased device weight, reducing payload capacity; synchronous control of multiple motors requires additional algorithms and sensors, increasing design difficulty and cost; and multi-motor systems have a high failure rate, with the failure of any one motor affecting the overall operational performance. Summary of the Invention

[0005] The purpose of this invention is to provide a single-motor driven fluid spraying device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a single-motor driven fluid spraying device, comprising: a housing, the housing being a rectangular box structure; a reduction motor, the reduction motor being installed inside the housing; a long optical shaft, the long optical shaft being installed inside the housing and drivingly connected to the output shaft of the reduction motor; a driving bevel gear, the driving bevel gear being fixedly installed on the long optical shaft; multiple parallel short optical shafts, each of the multiple short optical shafts penetrating the side wall of the housing; and two driven bevel gears, the two driven bevel gears being respectively fixedly installed on portions of the short optical shafts, the two driven bevel gears simultaneously meshing perpendicularly with the driving bevel gear to form a one-to-two bevel gear set, achieving a 90°... The system includes a power reversal mechanism and two short optical axes rotating in opposite directions. Two transmission discs are fixedly mounted on the extended ends of portions of the short optical axes. Multiple spherical plain bearings and multiple right-angle fixed rods are connected to the transmission discs via the spherical plain bearings, forming a flexible crank-rocker mechanism. This mechanism converts the rotational motion of the short optical axes into the reciprocating oscillation of the right-angle fixed rods. A transmission rod is rigidly connected at one end to each of the two right-angle fixed rods at a quarter-position, enabling synchronous reciprocating oscillation of the two right-angle fixed rods. Multiple fluid injection components are fixedly mounted on the right-angle ends of the multiple right-angle fixed rods, oscillating synchronously with the right-angle fixed rods to achieve dual-path synchronous injection.

[0007] Optionally, it further includes: a coupling, through which the long optical shaft is concentrically connected to the output shaft of the geared motor; and a motor bracket, which is fixedly installed on the bottom surface of the housing, and the geared motor is fixedly connected to the top of the motor bracket.

[0008] Optionally, the flexible crank rocker mechanism includes: four spherical plain bearings and two fully threaded studs, with one spherical plain bearing fixedly connected to the eccentric position of each transmission disc, one spherical plain bearing fixedly connected to the middle part of each right-angle fixed rod, and two spherical plain bearings connected to both ends of each fully threaded stud.

[0009] Optionally, it further includes: a gearbox housing, the gearbox housing being fixed inside the outer shell, the long optical shaft and the two short optical shafts passing through the gearbox housing, four vertical bearing seats, the non-right-angle end of each right-angle fixing rod being rotatably connected to the inner wall of the outer shell through two of the vertical bearing seats, and multiple shaft retaining rings, the shaft retaining rings being installed at both ends of the long optical shaft and the two short optical shafts for axial limiting.

[0010] Optionally, it also includes: a plurality of fixing screws, wherein the motor bracket, the gearbox housing and the vertical bearing are all fastened to the inner wall of the housing by the fixing screws.

[0011] Optionally, it further includes: a housing cover, which covers the end of the housing to form a closed cavity, and the geared motor and the long optical shaft are both installed inside the closed cavity.

[0012] Optionally, it also includes: a DC female connector, which is fixedly installed on the outer side of the housing; wires, the two ends of which are electrically connected to the DC female connector and the terminal block of the geared motor, respectively; two mounting rods, both of which are fixedly installed on the housing cover; two drone tripods, the two drone tripods are respectively fixedly connected to the bottom ends of the two mounting rods; and a tripod crossbeam, the two ends of which are respectively fixedly connected to the two drone tripods to form a drone mounting structure.

[0013] Optionally, the fluid jet assembly includes: a water pipe connector, which is fixedly installed at the right-angle end of the right-angle fixing rod for connecting to an external water source, and a metal nozzle, which is fixedly connected to the end of the water pipe connector.

[0014] Optionally, the coupling is a flexible coupling used to compensate for the coaxiality error between the output shaft of the geared motor and the long optical shaft, and the spherical plain bearing is a self-lubricating spherical plain bearing with angle compensation function.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This single-motor driven fluid spraying device has the following advantages: Through the coordinated operation of various components, the rotational power output by the geared motor is transmitted to the driving bevel gear via the long optical shaft. The driving bevel gear simultaneously meshes perpendicularly with the driven bevel gears on the two short optical shafts, forming a one-to-two transmission structure. This efficiently decomposes the single-axis rotational power into two vertical rotational powers, and the two short optical shafts automatically acquire opposite rotational directions. This transmission method eliminates the complex worm gear or multi-stage gear reversing mechanism in traditional solutions, greatly simplifies the transmission chain, effectively improves power transmission efficiency, and significantly reduces the overall size and weight of the device, as well as noise and vibration during the transmission process. This allows the device to better adapt to the compact and lightweight payload requirements of UAVs.

[0016] Through the coordinated operation of various components, the two short optical shafts drive their respective transmission discs to rotate synchronously. The eccentrically positioned spherical joint bearings convert the rotational motion into reciprocating oscillating motion, which in turn drives the right-angle fixed rods to oscillate around their axes. Since the two right-angle fixed rods are rigidly connected at a specific position through a transmission rod, when one right-angle fixed rod oscillates, the transmission rod transmits the motion synchronously to the other right-angle fixed rod, achieving purely mechanical synchronous oscillation of the two nozzles. This synchronization method does not rely on electronic control systems and sensors at all, fundamentally eliminating synchronization problems caused by differences in motor speed and transmission errors. It ensures that the oscillation angle and frequency of the two nozzles are completely consistent, avoiding spray overlap or omissions, making the spray volume distribution more uniform, and significantly improving the quality of operation.

[0017] Through the coordinated operation of various components, a single geared motor can simultaneously drive two nozzles to complete reciprocating oscillating spraying operations. Compared with traditional multi-motor drive solutions, this significantly reduces the number of motors and associated power lines, control circuits, and drive modules. This not only simplifies the electrical system structure and reduces the overall system complexity and failure rate, but also significantly reduces the energy consumption and weight of the device, effectively extending the operating time of the drone on a single charge and improving the drone's payload capacity. At the same time, the transmission disc and the right-angle fixed rod are connected by a spherical joint bearing, which can adaptively compensate for installation errors and angular deviations during movement, avoiding jamming in the transmission mechanism, making the load distribution more uniform, reducing the wear rate of components, extending the service life of the device, and reducing the frequency and cost of later maintenance. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 The main view; Figure 3 for Figure 1 Side view; Figure 4 for Figure 1 A schematic diagram of the assembly process after subsequent work; Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0020] In the diagram: 1. DC female connector, 2. Wire, 3. Housing, 4. Short optical shaft, 5. Gear motor, 6. Motor bracket, 7. Coupling, 8. Vertical bearing, 9. Gearbox housing, 10. Fully threaded stud, 11. Driven bevel gear, 12. Transmission disc, 13. Long optical shaft, 14. Spherical plain bearing, 15. Transmission rod, 16. Water pipe connector, 17. Right-angle fixing rod, 18. Metal nozzle, 19. Shaft retaining ring, 20. Fixing screw, 21. Housing cover, 22. Mounting rod, 23. UAV landing gear, 24. Landing gear crossbeam, 25. Driven bevel gear. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 5 The technical solution provided by this invention is as follows: A single-motor driven fluid spraying device, comprising: a housing 3, the housing 3 being a rectangular box structure; a reduction motor 5, the reduction motor 5 being installed inside the housing 3; a long optical shaft 13, the long optical shaft 13 being installed inside the housing 3 and being drively connected to the output shaft of the reduction motor 5; a driving bevel gear 25, the driving bevel gear 25 being fixedly installed on the long optical shaft 13; multiple parallel short optical shafts 4, the multiple short optical shafts 4 being provided and all penetrating the side wall of the housing 3; and two driven bevel gears 11, the two driven bevel gears 11 being respectively fixedly installed on a portion of the short optical shafts 4, the two driven bevel gears 11 simultaneously meshing perpendicularly with the driving bevel gear 25 to form a one-to-two bevel gear set, realizing 90° power reversal and two short optical shafts 4 driving the two short optical shafts 13. The optical axis 4 rotates in opposite directions; two transmission discs 12 are fixedly installed on the extended ends of parts of the short optical axis 4; multiple spherical joint bearings 14; multiple right-angle fixed rods 17 are connected to the transmission discs 12 and the right-angle fixed rods 17 through the spherical joint bearings 14 to form a flexible crank rocker mechanism, which converts the rotational motion of the short optical axis 4 into the reciprocating swing of the right-angle fixed rods 17; a transmission rod 15 is rigidly connected at both ends to the two right-angle fixed rods 17 at the quarter position, realizing the synchronous reciprocating swing of the two right-angle fixed rods 17; multiple fluid jet components are fixedly installed on the right-angle ends of the multiple right-angle fixed rods 17, and realize dual-path synchronous jetting by swinging synchronously with the right-angle fixed rods 17.

[0023] In the specific implementation process, it is worth noting that the geared motor 5 adopts a DC geared motor, which has the characteristics of small size, large torque, and adjustable speed. It can adjust the oscillation frequency of the nozzle according to different operation requirements. The long optical shaft 13 is made of high-strength alloy steel with a hardened surface, which has high hardness and wear resistance and can withstand large torque loads. The driving bevel gear 25 and the two driven bevel gears 11 adopt the same module and pressure angle design to ensure meshing accuracy and stability. All bevel gears are fixedly connected to the corresponding optical shafts by flat keys and are axially limited by shaft end retaining rings. The two short optical shafts 4 are symmetrically arranged on both sides of the long optical shaft 13, so that the driving bevel gear 25 is subjected to balanced force on both sides, avoiding shaft deformation caused by excessive load on one side. The long optical shaft 13 and the short optical shafts 4 are connected to the gearbox housing 9 by rolling shafts. The support ensures rotational accuracy and load-bearing capacity. The one-to-two bevel gear set simultaneously performs three functions: power splitting, 90° reversal, and forward and reverse steering output. No additional reversing valve or clutch is required, which greatly simplifies the transmission system structure. The transmission disc 12 is made of metal sheet stamping and the surface is treated with anti-rust treatment, which has good corrosion resistance. The right-angle fixing rod 17 adopts an L-shaped structure. The transmission rod 15 is rigidly connected to the right-angle fixing rod 17 by bolts. The connection is firm and easy to disassemble. The quarter position of the transmission rod 15 refers to the point one-quarter of the length along the rod length, starting from the non-right-angle end where the right-angle fixing rod 17 is connected to the vertical bearing 8. The fluid spray assembly swings synchronously with the right-angle fixing rod 17, which can form a continuous spray coverage area in the horizontal direction, effectively expanding the coverage area of ​​a single operation.

[0024] Furthermore, it also includes: a coupling 7, the long optical shaft 13 being concentrically connected to the output shaft of the geared motor 5 via the coupling 7, a motor bracket 6, the motor bracket 6 being fixedly installed on the bottom surface of the housing 3, and the geared motor 5 being fixedly connected to the top of the motor bracket 6.

[0025] In the specific implementation process, it is worth noting that the motor bracket 6 adopts an integrated stamping structure with high rigidity. During actual installation, a buffer rubber pad is installed at its bottom, which can effectively absorb the vibration generated by the geared motor 5 during operation. A rubber shock-absorbing pad is set between the geared motor 5 and the motor bracket 6 to further reduce the transmission of vibration to the outer shell 3. The two ends of the coupling 7 are connected to the output shaft of the geared motor 5 and the long optical shaft 13 respectively through flat keys. The flat keys adopt standard fit tolerances to ensure the reliability of torque transmission.

[0026] Furthermore, the flexible crank rocker mechanism includes: four spherical plain bearings 14 and two fully threaded studs 10. A spherical plain bearing 14 is fixedly connected to the eccentric position of each transmission disc 12, a spherical plain bearing 14 is fixedly connected to the middle part of each right-angle fixed rod 17, and two spherical plain bearings 14 are connected to both ends of each fully threaded stud 10.

[0027] In the specific implementation process, it is worth noting that the two ends of the fully threaded stud 10 are respectively threaded to the inner rings of the two spherical plain bearings 14. By rotating the fully threaded stud 10, the total length of the connecting rod can be adjusted, thereby precisely adjusting the swing angle range of the right-angle fixed rod 17. Several mounting holes are provided radially on the transmission disc 12. The spherical plain bearings 14 can be installed at different eccentric positions as needed to achieve different swing amplitude adjustments. The outer rings of the spherical plain bearings 14 are fixed to the eccentric positions of the transmission disc 12 and the middle part of the right-angle fixed rod 17 by bolts. The four spherical plain bearings 14 adopt the same specifications and have good interchangeability.

[0028] Furthermore, it also includes: a gearbox housing 9, which is fixed inside the outer shell 3; a long optical shaft 13 and two short optical shafts 4 that pass through the gearbox housing 9; four vertical bearings 8; the non-right-angle end of each right-angle fixing rod 17 is rotatably connected to the inner wall of the outer shell 3 through two vertical bearings 8; and multiple shaft retaining rings 19, with shaft retaining rings 19 installed at both ends of the long optical shaft 13 and the two short optical shafts 4 for axial limiting.

[0029] In the specific implementation process, it is worth noting that the gearbox housing 9 is a split structure, consisting of an upper cover and a lower housing, which facilitates the installation and maintenance of the bevel gear set. The upper cover and the lower housing are fastened together with bolts, and sealing measures are adopted at the mating surfaces. The gearbox housing 9 is filled with an appropriate amount of grease to lubricate the meshing parts of the bevel gears, reducing wear and noise. Each right-angle fixing rod 17 is supported by two vertical bearings 8, forming a double-support structure, which improves the rigidity and rotational accuracy of the shaft system. The inner rings of the right-angle fixing rod 17 and the vertical bearings 8 adopt standard fit tolerances. The shaft retaining ring 19 is inserted into the annular groove at the end of the optical shaft, which can effectively prevent the optical shaft from axially moving during operation.

[0030] Furthermore, it also includes: multiple fixing screws 20, the motor bracket 6, gearbox housing 9 and vertical bearing 8 are all fastened to the inner wall of the outer casing 3 by fixing screws 20.

[0031] In the specific implementation process, it is worth noting that all fixing screws 20 are made of high-strength stainless steel, which has good rust resistance and mechanical strength, and is suitable for use in outdoor humid environments; the motor bracket 6 is fixed to the bottom surface of the housing 3 by multiple fixing screws 20, and the screws are symmetrically distributed to ensure the firmness of the connection; the mounting surfaces of the gearbox housing 9 and the vertical bearing 8 are provided with positioning pin holes, and the positioning pins adopt standard fit. After precise positioning by positioning pins, the fixing screws 20 are tightened to ensure installation accuracy.

[0032] Furthermore, it also includes: a housing cover 21, which covers the end of the housing 3 to form a closed cavity, and the geared motor 5 and the long optical shaft 13 are both installed inside the closed cavity.

[0033] In the specific implementation process, it is worth noting that both the outer shell 3 and the outer shell cover 21 are made of lightweight and high-strength metal materials by die casting. They are lightweight and strong, which can effectively protect the internal transmission components from external impacts.

[0034] Furthermore, it also includes: a DC female connector 1, which is fixedly installed on the outer side of the outer shell 3; a wire 2, the two ends of which are electrically connected to the DC female connector 1 and the terminal of the geared motor 5, respectively; two mounting rods 22, both of which are fixedly installed on the outer shell cover 21; two drone tripods 23, which are fixedly connected to the bottom ends of the two mounting rods 22; and a tripod crossbeam 24, the two ends of which are fixedly connected to the two drone tripods 23, forming a drone mounting structure.

[0035] In the specific implementation process, it is worth noting that the DC female connector 1 has a protective cover, which can be connected externally when not in use. When covered, it can protect the interface. Its voltage level is matched with the onboard power supply voltage of the UAV. The wire 2 is an oil-resistant and aging-resistant insulated wire with a suitable wire diameter to meet the current transmission requirements. It is suitable for use in harsh outdoor environments. The mounting rod 22 and the outer shell cover 21 are fixedly connected by a connecting seat. The UAV tripod 23 is made of lightweight and high-strength composite material, which is lightweight and strong, and can effectively reduce the overall weight of the device. The tripod crossbeam 24 can improve the stability of the tripod.

[0036] Furthermore, the fluid jet assembly includes: a water pipe connector 16, which is fixedly installed at the right-angle end of the right-angle fixing rod 17 for connecting to an external water source, and a metal nozzle 18, which is fixedly connected to the end of the water pipe connector 16.

[0037] In the specific implementation process, it is worth noting that the water pipe connector 16 is a pagoda connector, which can quickly connect and disconnect external water pipes, improving work efficiency. The metal nozzle 18 is made of corrosion-resistant metal material, which has good corrosion resistance and wear resistance. The nozzle of the metal nozzle 18 is a fan-shaped nozzle. By selecting an appropriate spray angle, a uniform fan-shaped spray surface can be formed, improving the spray coverage area and uniformity. The metal nozzle 18 and the water pipe connector 16 are connected by threads, and different specifications of nozzles can be replaced according to different work requirements.

[0038] Furthermore, the coupling 7 is a flexible coupling used to compensate for the coaxiality error between the output shaft of the geared motor 5 and the long optical shaft 13, and the spherical plain bearing 14 is a self-lubricating spherical plain bearing with angle compensation function.

[0039] In the specific implementation process, it is worth noting that the elastic element of the flexible coupling is made of wear-resistant elastic material, which has good elasticity and buffering performance, and can effectively buffer the impact and vibration during the transmission process. The sliding surface of the self-lubricating spherical plain bearing is inlaid with self-lubricating composite material, which does not require additional lubricating oil and is easy to maintain. The spherical plain bearing 14 can swing freely within a certain angle range, effectively compensating for installation errors and angular deviations generated during movement, avoiding jamming in the transmission mechanism, and improving the reliability and service life of the device.

[0040] It is also worth noting that the power system of this device consists of only one electrical component, the geared motor 5, resulting in a simple and reliable overall circuit structure. The device uses a DC female connector 1 fixed to the outer facade of the outer casing 3 as its sole power input interface, which is adapted to connect to the output plug of the UAV's onboard power supply to obtain the DC power required for operation. One end of the wire 2 is soldered or crimped to the internal terminal block of the DC female connector 1, while the other end is neatly routed along the inner wall of the outer casing 3, avoiding the movement paths of all moving parts. It is then fixed to a pre-reserved position on the inner wall of the outer casing 3 using cable ties or clips, and finally connected to the two terminals of the geared motor 5, forming a complete power supply circuit. The start, stop, speed adjustment, and forward / reverse control of the geared motor 5 are all uniformly implemented by the UAV's flight control system through the power supply line, eliminating the need for additional independent control circuit boards or sensors. This further simplifies the system structure and reduces the risk of electrical failures. All electrical connections are insulated with insulating tape or heat shrink tubing, effectively preventing short circuits caused by rainwater and moisture during outdoor operations, ensuring the device's electrical safety in complex environments.

[0041] Working principle: Power input and reversing: When the device is working, the external DC power supply is connected through the DC female connector 1 and the power is transmitted to the geared motor 5 through the wire 2. The geared motor 5 is driven to output a stable rotational torque. The output torque of the geared motor 5 is transmitted to the long optical shaft 13 through the coupling 7, which drives the long optical shaft 13 and its driving bevel gear 25 to rotate synchronously. The driving bevel gear 25 simultaneously meshes perpendicularly with the driven bevel gears 11 on the two parallel short optical shafts 4, forming a one-to-two bevel gear transmission group. While completing the 90° power reversal, the two short optical shafts 4 obtain rotational motion in opposite directions. Dual power split output can be achieved without an additional reversing mechanism.

[0042] Rotational motion conversion: Two short optical shafts 4 rotating in opposite directions drive the transmission disks 12 at their extended ends to rotate synchronously. The spherical plain bearings 14 at the eccentric position of the transmission disks 12 convert the circular motion into planar reciprocating motion. The spherical plain bearings 14 are connected to another spherical plain bearing 14 on the right-angle fixed rod 17 through the fully threaded stud 10, forming a flexible crank rocker mechanism. This mechanism drives the right-angle fixed rod 17 to reciprocate around the axis of the vertical seat bearing 8. The spherical plain bearings 14 can adaptively compensate for installation errors and motion angle deviations, effectively avoiding transmission jamming and component wear.

[0043] Dual-path mechanical synchronization: Since the two right-angle fixed rods 17 are rigidly connected at one-quarter position by the transmission rod 15, when either right-angle fixed rod 17 swings, the transmission rod 15 will synchronously transmit the swing displacement and torque to the other right-angle fixed rod 17. This purely mechanical synchronization method eliminates the speed difference and phase delay that exist in electronic synchronization, ensuring that the swing angle, frequency and phase of the two right-angle fixed rods 17 are consistent, fundamentally avoiding the problem of spray overlap or omission, and ensuring the uniform distribution of spray volume.

[0044] Fluid jetting operation: External high-pressure fluid enters the fluid channel of the right-angle fixed rod 17 through the water pipe joint 16, and is finally ejected at high speed from the metal nozzle 18. As the right-angle fixed rod 17 swings back and forth, the metal nozzle 18 forms a continuous fan-shaped spray surface in the horizontal direction. The two synchronously swinging metal nozzles 18 together constitute a dual-path synchronous spray system, which greatly improves the spray coverage area and operation efficiency. The entire device only requires a single geared motor 5 for drive, realizing the integrated coordinated operation of power, transmission, synchronization and spray, and meeting the requirements of lightweight and long-endurance operation of UAVs.

[0045] 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. A fluid spraying device driven by a single motor, characterized in that, include: The outer shell (3) is a rectangular box structure; A geared motor (5) is installed inside the housing (3); Long optical shaft (13), the long optical shaft (13) is installed inside the housing (3) and is connected to the output shaft of the geared motor (5) for transmission; An active bevel gear (25) is fixedly mounted on the long optical shaft (13); Parallel short optical axes (4) are provided, and multiple parallel short optical axes (4) are provided, and multiple short optical axes (4) penetrate the side wall of the outer shell (3); Two driven bevel gears (11) are fixedly mounted on a portion of the short optical shaft (4). The two driven bevel gears (11) mesh perpendicularly with the driving bevel gear (25) at the same time to form a one-to-two bevel gear set, realizing 90° power reversal and the two short optical shafts (4) rotating in opposite directions. Two drive discs (12) are respectively fixedly installed on the outer end of part of the short optical shaft (4); Multiple spherical plain bearings (14); Multiple right-angle fixed rods (17) are connected to the transmission disc (12) and the right-angle fixed rods (17) through the spherical joint bearing (14) to form a flexible crank rocker mechanism, which converts the rotational motion of the short optical axis (4) into the reciprocating swing of the right-angle fixed rods (17); The transmission rod (15) is rigidly connected at one-quarter position to the two right-angle fixed rods (17) at both ends, so as to realize the synchronous reciprocating swing of the two right-angle fixed rods (17); Multiple fluid jetting components are fixedly installed at the right-angle ends of multiple right-angle fixing rods (17), and swing synchronously with the right-angle fixing rods (17) to achieve dual-path synchronous jetting.

2. The single-motor driven fluid spraying device according to claim 1, characterized in that, Also includes: The long optical shaft (13) is concentrically connected to the output shaft of the geared motor (5) via the coupling (7). The motor bracket (6) is fixedly installed on the bottom surface of the housing (3), and the geared motor (5) is fixedly connected to the top of the motor bracket (6).

3. The single-motor driven fluid spraying device according to claim 1, characterized in that, The flexible crank-rocker mechanism includes: Four spherical plain bearings (14) and two fully threaded studs (10); Each of the transmission discs (12) is fixedly connected to a spherical plain bearing (14) at its eccentric position, and a spherical plain bearing (14) is fixedly connected to the middle part of each right-angle fixed rod (17). Two spherical plain bearings (14) are connected to both ends of each fully threaded stud (10).

4. The single-motor driven fluid spraying device according to claim 1, characterized in that, Also includes: Gearbox housing (9), the gearbox housing (9) is fixed inside the outer shell (3), the long optical axis (13) and the two short optical axes (4) both penetrate the gearbox housing (9). Four vertical bearings (8), and the non-right-angle end of each of the right-angle fixing rods (17) is rotatably connected to the inner wall of the housing (3) through two of the vertical bearings (8); Multiple shaft retaining rings (19) are installed at both ends of the long optical shaft (13) and the two short optical shafts (4) for axial positioning.

5. The single-motor driven fluid spraying device according to claim 2, characterized in that, Also includes: Multiple fixing screws (20) are used to fasten the motor bracket (6), the gearbox housing (9) and the vertical bearing (8) to the inner wall of the outer shell (3).

6. The single-motor driven fluid spraying device according to claim 1, characterized in that, Also includes: The outer casing cover (21) is fitted onto the end of the outer casing (3) to form a closed cavity; The geared motor (5) and the long optical shaft (13) are both installed inside the enclosed cavity.

7. The single-motor driven fluid spraying device according to claim 6, characterized in that, Also includes: DC female connector (1), the DC female connector (1) is fixedly installed on the outer side of the outer shell (3); The two ends of the wire (2) are electrically connected to the DC female connector (1) and the terminal of the geared motor (5), respectively. Two mounting rods (22) are fixedly mounted on the outer casing (21); Two drone tripods (23) are fixedly connected to the bottom ends of the two mounting rods (22); The two ends of the tripod beam (24) are fixedly connected to the two UAV tripods (23) to form a UAV mounting structure.

8. The single-motor driven fluid spraying device according to claim 1, characterized in that, The fluid jetting assembly includes: Water pipe connector (16), the water pipe connector (16) is fixedly installed at the right-angle end of the right-angle fixing rod (17) for connecting to an external water source; Metal nozzle (18) is fixedly connected to the end of the water pipe connector (16).

9. The single-motor driven fluid spraying device according to any one of claims 1 to 8, characterized in that, The coupling (7) is a flexible coupling used to compensate for the coaxiality error between the output shaft of the geared motor (5) and the long optical shaft (13); The spherical plain bearing (14) is a self-lubricating spherical plain bearing with angle compensation function.

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