Symmetrical reversal double-rotor shaftless propeller

Abstract

The invention relates to a symmetrical reverse rotation double-rotor shaftless propeller which comprises a body, hydrofoils, an energy storage part, a propelling part and a grabbing part. A motor is installed on the inner side of the motor shell, the output end penetrates through the mechanical sealing mechanism to be connected with a first straight gear, a second gear is in meshing transmission with the outer side of the first gear, and a gear is arranged on one side of the second gear. A first rotating ring and a second rotating ring are rotationally arranged on the inner side of the first shell and the inner side of the second shell, a motor drives the two rotating rings provided with gear rings to rotate reversely through a gear set, aquatic sundries cannot be wound, the double rotating rings are symmetrically arranged to generate balance thrust, single-shaft torque is offset, operation is stable, and vibration and energy loss are reduced. The left outer tooth impeller and the right outer tooth impeller are symmetrically arranged, the angles and the rotation directions of the impellers are opposite, thrust is the same, an exposed shaft system is eliminated, sundries such as aquatic plants and fishing nets cannot be wound, balance thrust is generated, single-shaft torque is effectively offset, control is easy, and vibration and energy loss are reduced. Meanwhile, the propeller can be provided with hydrofoils, so that people can stand on the hydrofoils to run.

Description

Technical Field

[0001] This application relates to the field of propulsion, and more particularly to a symmetrical reversing dual-rotor shaftless propulsion. Background Technology

[0002] Underwater or surface propulsion devices are based on Newton's third law. They use an electric motor to drive a propeller or water jet to push water flow and generate reaction force, thereby providing power and motion control for ships, diving equipment, underwater robots, etc. Their core components include an electric motor, a propeller, and a sealing system. They are characterized by high efficiency, corrosion resistance, and low noise, and are widely used in marine exploration, underwater engineering, national defense, and water recreation.

[0003] Regarding the aforementioned technologies, the inventors believe that current underwater propulsion devices help divers move quickly underwater or on the surface. However, a problem exists in practical use: traditional propulsion devices are all shafted, with the motor directly driving through a shaft or reducer. As the blades and shaft rotate, the shaft can easily become entangled with weeds or other aquatic vegetation, creating safety hazards. Furthermore, existing shaftless propulsion devices use hub motors to directly drive the impeller, which presents challenges in deep-water sealing. Additionally, a single-shaft impeller generates a reverse torque, especially in high-powered small submersibles. Therefore, the inventors urgently need to design a symmetrical, counter-rotating, dual-rotor shaftless propulsion device to improve the safety of underwater operation and to combine it with various applications such as diving and standing-on-water movement. Summary of the Invention

[0004] To improve the safety of the propulsion system and reduce the risk of it becoming entangled with weeds underwater, this application provides a symmetrical, counter-rotating, shaftless dual-rotor propulsion system, on which hydrofoils can be mounted and remotely controlled. Handles, marine accessories, and other components provide power in various ways.

[0005] The symmetrical, reversible, dual-rotor shaftless thruster provided in this application adopts the following technical solution: A symmetrical reversing dual-rotor shaftless propulsion device includes a main body, hydrofoils, and a remote control unit; the main body includes an energy storage unit and a propulsion unit, the propulsion unit includes a motor housing, a first housing, and a second housing, a motor is installed inside the motor housing, and the output end of the motor is connected to a first spur gear through a mechanical seal mechanism, and a second gear meshes with the outer side of the first spur gear; The inner sides of the first outer shell and the second outer shell are rotatably provided with a first rotating ring and a second rotating ring, and the inner sides of the first rotating ring and the second rotating ring are arranged in a ring array with several blades. The first rotating ring and the second rotating ring are respectively provided with a first gear ring and a second gear ring on their outer sides. The first spur gear meshes with the second gear ring for transmission, and the second gear meshes with the first gear ring for transmission, so as to realize the synchronous reverse rotation of the two rotating rings.

[0006] The first outer shell and the second outer shell are assembled and connected, and the first rotating ring and the second rotating ring are mirror-distributed on the inner sides of the first outer shell and the second outer shell.

[0007] The hydrofoil includes a middle plate, with wing plates inserted into both sides of the middle plate in a mirror image. The middle plate is provided with a placement groove for mounting the main body and is locked by a device.

[0008] The main body has mounting holes, which can be used to mount hydrofoils, diving supports, or marine supports.

[0009] By adopting the above technical solution, a compact, high-efficiency, low-disturbance, and multi-condition adaptable underwater propulsion function is achieved. The propeller uses a single motor to drive a first spur gear meshing with a gear ring, causing the first and second rotating rings to rotate synchronously in opposite directions, forming a symmetrical, counter-rotating dual-rotor propulsion mode. This effectively counteracts the anti-torque generated by a traditional single-rotor, improving propulsion stability and heading control capability, reducing attitude control burden. The shaftless blade structure avoids the entanglement of weeds and other debris caused by traditional drive shaft blades, improving system reliability and long-term service life. The annular array of blades is arranged on the rotating rings. The inner side streamlines the thruster's shape, reducing cavitation noise and energy loss while ensuring thrust output. It is suitable for underwater or shipboard applications where low noise and high concealment are required. The mirrored structure of the first and second outer shells makes the force distribution more balanced, improving the overall structural strength and smooth operation. Through the modular design of the mounting holes, hydrofoils, diving supports, or marine supports can be flexibly installed as needed, enabling the thruster to quickly switch between various application scenarios such as diving, hydrofoil propulsion, submersible propulsion, and ship auxiliary propulsion. It has good versatility and engineering adaptability.

[0010] The energy storage unit includes a housing mounted on the propulsion unit, and a plurality of battery packs are installed on the inner side of the housing.

[0011] By adopting the above technical solution, the battery pack is centrally integrated into the casing installed on the propulsion unit, realizing the integrated layout of energy storage and propulsion system. This effectively shortens the power transmission path, reduces line loss and failure risk, and the casing provides structural protection and sealed isolation for the battery pack, improving its safety and reliability in underwater or humid environments. At the same time, the quick-change battery structure facilitates modular replacement and maintenance of the batteries, thereby improving the overall endurance and engineering practicality of the propulsion unit.

[0012] Optionally, the battery pack includes several battery groups, an end cap is sealed at the front end of the casing, a tail cap is sealed at the rear end of the casing, and a handle is provided on the surface of the end cap. The battery pack is installed obliquely into the battery module, and the battery module can be inserted and removed into the energy storage section of the main body.

[0013] By adopting the above technical solution, the battery pack is composed of multiple battery groups and installed in an oblique insertion manner, which realizes quick insertion and removal and reliable positioning of the batteries, making it easy to complete assembly and replacement in a confined space. The sealing structure of the end cover and tail cover improves the waterproof and moisture-proof performance of the energy storage unit. Together with the battery pack limiting rod, it enhances the convenience of battery pack loading and unloading, thereby effectively improving the system's maintenance efficiency and continuous operation capability.

[0014] Optionally, the tail cap is sealed to the motor housing, and the motor is controlled by an electronic controller. The electronic controller is electrically connected to the battery pack and can adjust the motor according to the control signal from the operator's handheld remote control.

[0015] By adopting the above technical solution, a reliable sealed connection is formed between the tail cover and the motor housing, making the motor power unit and electronic components such as the battery independent sealed cavities. This improves the operational safety and stability of the propulsion system in the underwater environment. The electronic controller enables intelligent power supply and control between the battery pack and the motor, and adjusts the motor output status in real time according to the control signals sent by the remote control unit, achieving flexible control of propulsion force and operating mode, and improving control precision and ease of use.

[0016] Optionally, the remote control unit includes at least one control switch, and the remote control unit communicates wirelessly with the main body via wireless signals to remotely command the motor to operate.

[0017] By adopting the above technical solution, a remote control unit with a control switch is established to establish wireless communication with the main body, realizing remote control of the motor operation. This avoids the limitations of wired connection on the scope of use and operational flexibility. The wireless remote control method allows the operator to complete the start-stop and operation condition adjustment within a safe distance, improving the ease of use, environmental adaptability and overall operational safety of the thruster.

[0018] Optionally, the remote control unit can be installed at different positions on the main body via a bracket and can serve as a handle for the submersible.

[0019] By adopting the above technical solution, the remote control unit can be flexibly installed in different positions on the main body via the bracket, and also functions as a submersible handle to meet the needs of different usage postures and operating habits. While achieving stable control, it is convenient for the operator to directly grasp the thruster for underwater movement, thus improving human-machine adaptability, operational stability, and safety during diving operations.

[0020] Optionally, counterweights of different sizes can be installed on the bracket to adjust the buoyancy.

[0021] By adopting the above technical solutions, the overall weight and buoyancy of the thruster can be flexibly adjusted according to the usage environment and operational requirements, thereby achieving buoyancy balance and attitude stability of the thruster in water, reducing the operator's control burden, and improving the stability, control precision, and applicable working conditions of underwater motion.

[0022] In summary, this application includes at least one of the following beneficial technical effects: By using a symmetrical reverse-rotor design, the two rotating rings can rotate synchronously in opposite directions, effectively counteracting the anti-torque, improving the propeller's heading control and attitude stability, and reducing the handling burden. The thruster housing has a modular structure, which facilitates disassembly, cleaning, and maintenance.

[0023] The shaftless propulsion structure, combined with the mechanical seal mechanism, reduces the risk of debris such as weeds getting entangled in the through-shaft blades, and improves the waterproof performance and long-term operational reliability of the propulsion system; The ring array blade arrangement and mirror shell structure optimize the force distribution and hydrodynamic characteristics, achieving high-efficiency propulsion, low disturbance and low cavitation noise, making it suitable for highly concealed underwater operations. The modular energy storage design, the angled battery pack installation and the end cap sealing structure facilitate quick replacement and maintenance, and improve the range and system reliability. The tail cap is sealed to the motor housing and the electronic controller is intelligently adjusted to achieve precise control of the propeller motor, improving operating sensitivity and ease of use; The motor propulsion unit and battery energy compartment are designed as independent sealed compartments, increasing reliability.

[0024] The remote control unit supports wireless communication and multi-position installation. It can also be used as a submersible handle and a remote speed controller to meet different operational requirements such as diving, hydrofoil, and marine power. 503. The connecting plate can be fitted with counterweights of different specifications, supporting buoyancy adjustment, so that the thruster is buoyant and stable underwater, adapting to different working conditions and improving control precision and operating comfort. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a symmetrically reversed dual-rotor shaftless propulsion device according to an embodiment of this application.

[0026] Figure 2 yes Figure 1 Schematic diagram of the central propulsion unit Figure 1 .

[0027] Figure 3 yes Figure 1Schematic diagram of the central propulsion unit Figure 2 .

[0028] Figure 4 This is the book Figure 1 A schematic diagram of the deployment of the hydrofoil.

[0029] Figure 5 This is a schematic diagram of the internal structure of the connecting propulsion unit in an embodiment of this application.

[0030] Figure 6 This is a schematic diagram of the body bolt mounting interface according to an embodiment of this application.

[0031] Figure 7 This is a schematic diagram of the body with hydrofoils installed in an embodiment of this application.

[0032] Figure 8 This is a schematic diagram of the installation of the battery pack and battery assembly according to an embodiment of this application.

[0033] Figure 9 This is a schematic diagram of an embodiment of this application when used as a submersible.

[0034] Explanation of reference numerals in the attached drawings: 1. Hydrofoil; 101. Intermediate plate; 102. Wing plate; 103. Placement slot; 2. Energy storage unit; 201. Housing; 202. End cap; 203. Tail cap; 204. Battery pack; 2041. Battery group; 205. Limiting rod; 3. Propulsion unit; 301. Motor housing; 302. First housing; 303. Second housing; 304. First rotating ring; 305. Second rotating ring; 306. Motor; 307. Reinforcing rod; 308. First spur gear; 309. Gear 2; 311. First gear ring; 312. Second gear ring; 313. Mechanical seal mechanism; 4. Remote control unit; 5. Main body; 502. Connecting hole; 503. Connecting plate. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0036] This application discloses a symmetrical, reverse-rotor, shaftless propulsion system. (Refer to...) Figure 1 It includes a main body 5, a hydrofoil 1, and a remote control unit 4; the main body 5 includes an energy storage unit 2 and a propulsion unit 3. The energy storage unit 2 and the propulsion unit 3 are integrated into the main body 5. Combined with the symmetrical counter-rotating dual-rotor shaftless propulsion structure, it achieves efficient and stable propulsion in the underwater environment, effectively counteracts the anti-torque, improves directional stability, and reduces the risk of water flow disturbance and entanglement. At the same time, with the flexible configuration of the hydrofoil and the remote control unit, it improves safety and adaptability to various operating scenarios. Reference Figure 2 , Figure 3The propulsion unit 3 includes a motor housing 301, a first housing 302, and a second housing 303. A motor 306 is installed inside the motor housing 301. The output end of the motor 306 is connected to a first spur gear 308 through a mechanical sealing mechanism 313. A second gear 309 meshes with the outer side of the first spur gear 308. A first rotating ring 304 and a second rotating ring 305 are rotatably arranged on the inner sides of the first outer shell 302 and the second outer shell 303. Several blades are arranged in a ring array on the inner sides of the first rotating ring 304 and the second rotating ring 305. A first gear ring 311 and a second gear ring 312 are respectively arranged on the outer sides of the first rotating ring 304 and the second rotating ring 305. A first spur gear 308 meshes with the second gear ring 312, and a second gear 309 meshes with the first gear ring 311, realizing synchronous reverse rotation of the two rotating rings. A single motor 306 drives the first spur gear 306 and the second gear 309 through a mechanical seal mechanism, and they mesh with the first gear ring 308 and the second gear ring 312 respectively, realizing synchronous reverse rotation of the first rotating ring 304 and the second gear ring 305. The synchronous reverse rotation of the second rotating ring 305 enables the annular array blades to form a stable symmetrical reverse propulsion flow field. While outputting propulsion force, it effectively counteracts the anti-torque generated by the traditional single propeller, reduces attitude deviation and vibration during propulsion operation, and improves heading stability and control precision. The symmetrical arrangement of the first outer shell 302 and the second outer shell 303 ensures that the rotating ring is subjected to uniform force, improves the overall structural strength and smoothness of operation. The mechanical seal mechanism 313 ensures efficient power transmission while effectively isolating water from entering the motor cavity, enhancing the waterproof reliability and safety of the propulsion unit 3 under long-term underwater operation conditions, reducing energy loss, extending equipment service life, and improving the overall performance of the propulsion unit in complex aquatic environments.

[0037] Reference Figure 4 The hydrofoil 1 includes a middle plate 101, with wing plates 102 mirror-connected to both sides of the middle plate 101. The surface of the middle plate 101 has a placement groove 103 for limiting the position of the main body 5. The hydrofoil 1 adopts a mirror-connection arrangement of the middle plate 101 and the wing plates 102, realizing the modularity and adjustability of the buoyancy mechanism. Users can adjust the extension degree of the wing plates as needed to change the buoyancy magnitude and distribution, adapting to different load conditions and operational requirements. At the same time, the placement groove 103 on the surface of the middle plate 101 provides precise positioning and fixing functions for the main body 5. If the main body 5 shifts or loosens during operation, it not only ensures the stability of the equipment's center of gravity but also facilitates the quick installation of the main body 5, greatly improving the convenience and safety of use.

[0038] Reference Figure 5 , Figure 6The front part of the main body 5 is the energy storage unit 2, which includes a housing 201. The housing 201 is fastened to the intermediate plate 101 by clamps and bolts. Several battery packs 2041 are installed inside the housing 201. The installation method of fastening the housing 201 to the intermediate plate 101 by clamps and bolts achieves a firm and reliable fixing effect, preventing the battery packs from loosening or shifting in the underwater vibration environment, and ensuring the stability of the power connection. At the same time, the multiple battery packs 2041 installed inside the housing adopt a distributed layout, which optimizes the weight distribution and provides redundancy backup. The failure of a single battery will not cause the entire system to be paralyzed, which greatly improves the reliability and safety of the energy system and extends the service life of the overall equipment.

[0039] Reference Figure 6 When the dual-rotor shaftless propulsion unit is installed and used with a non-powered boat or kayak, several connecting holes 502 are axially arranged on the circumference of the main body 5. The connecting holes 502 are fixedly connected to the hull by connectors. When the dual-rotor shaftless propulsion unit starts working, the driving force drives the non-powered boat to move, improving navigation efficiency and maneuverability, enabling the non-powered boat to have the ability to move, and expanding its use scenarios and application value.

[0040] Reference Figure 7 The main body 5 of the dual-rotor shaftless propulsion unit is equipped with hydrofoils 1. The middle plate 101 of the hydrofoils 1 is fixedly connected to the main body 5. The wing plates 102 on both sides of the middle plate 101 are mirror-connected. The operator stands on the wing plates 102 on both sides of the middle plate 101. The remote control of the dual-rotor shaftless propulsion unit is carried by the operator, who commands the dual-rotor shaftless propulsion unit to execute according to the operator's commands. By installing hydrofoils on the main body of the dual-rotor shaftless propulsion unit, the propulsion unit and the hydrofoils form an integrated propulsion structure. The operator can stand on the wing plates on both sides of the middle plate to operate the unit and control the propulsion unit with the remote control carried by the operator. This achieves a safe operation mode of human-machine separation, improves gliding stability and movement flexibility, and enhances the safety, fun and control experience of water sports.

[0041] Reference Figure 8 The main body 5 of the dual-rotor shaftless propulsion unit houses a battery pack 204, which contains several battery groups 2041. These battery groups 2041 are connected in series and electrically via limiting rods 205, forming an integrated battery module. This structure ensures stable connection between the batteries and facilitates overall installation and maintenance, greatly improving the integrity and reliability of the battery pack. The battery groups 2041 are connected by a snap-fit ​​method, allowing for the connection of one or more battery groups 2041 as needed. The battery groups 2041 can be quickly replaced via two side buttons. The battery pack 204 is installed on the main body 5. Both the battery pack 204 and the battery groups 2041 are angled insertion type, facilitating easy installation and disassembly.

[0042] Reference Figure 9 When the dual-rotor shaftless propulsion system is used as a submersible, a connecting plate 503 is fixed on the circumference of the main body 5. The axial position of the connecting plate 503 fixed on the main body 5 can be adjusted according to the individual shape of the diver, such as height, to improve human-machine compatibility. Remote control units 4 are provided on both sides of the connecting plate 503. The remote control units 4 have grip handles, which make it easy for the diver to directly control the system underwater, so as to achieve stable and labor-saving underwater operation and improve the safety and operation efficiency of diving operations.

[0043] In specific implementation, the remote control unit 4 includes at least one control switch. The remote control unit 4 communicates wirelessly with the main body 5 via wireless signals to remotely command the motor 306 to work. The remote control unit 4 can be installed at different positions on the main body via a bracket and can also be used as a handle for a submersible. At the same time, different sizes of counterweights can be installed on the bracket to facilitate the adjustment of the overall buoyancy when used as a submersible.

[0044] The dual-rotor shaftless thruster disclosed in this application offers high efficiency, reliability, and safety in underwater operations and surface motion. It solves the safety hazards caused by exposed shafts easily getting entangled in weeds, fishing nets, and other debris. The unique shaftless structure improves the stability and operability of the thruster. Through the synchronous rotation mechanism of the dual rotating rings and the high-efficiency motor drive system, it increases thrust while reducing energy loss and ensuring low operating noise, making it suitable for various underwater operating environments, especially in applications requiring concealment and high-efficiency propulsion.

[0045] In this embodiment, the dual-rotor shaftless thruster drives a series of gear systems connected by a precision mechanical seal mechanism 313 via a motor 306. The power output of the motor 306 is transmitted to the first spur gear 308 through the mechanical seal device, and then to the second gear ring 312 through the gear set, realizing the synchronous rotation of the two rotating rings 304 and 305. This solves the problem of shaft entanglement in traditional systems, and the symmetrical thrust generated by the two rotating rings effectively offsets the torque generated by the single rotating body, ensuring the stable operation of the thruster in water.

[0046] The hydrofoil 1 and energy storage unit 2 of the dual-rotor shaftless propulsion system adopt a modular design. The hydrofoil is constructed by interlocking the intermediate plate 101 and the wing plate 102, which enhances the stability of the structure and provides flexibility, making it easy to adjust the buoyancy and distribution as needed. The bottom surface of the hydrofoil 1 adopts an arc design, which effectively reduces water flow resistance and enables the propulsion system to work more efficiently. The battery module of the energy storage unit 2 is housed in the casing 201 and is independently sealed from the propulsion unit 301, ensuring the sealing and reliability of the battery and motor in the underwater environment. The distributed layout improves redundancy and ensures that the system can still operate normally when a single battery fails.

[0047] The dual-rotor shaftless propulsion system is highly adaptable, serving as a standalone underwater propulsion device or as a power unit for kayaks or other watercraft as needed. The propulsion system's control module is detachable from the main body and connected via a wireless receiver, supporting remote control and communication control. It is suitable for a wider range of underwater and surface operations, and the quick-change battery pack system greatly improves the equipment's maintenance efficiency.

[0048] The dual-rotor shaftless propulsion system of this embodiment performs excellently in terms of reliability, efficiency, and safety. Further optimization of its energy management system and control mechanism enhances its application potential in intelligent and underwater automated operations. The application of shaftless propulsion systems in marine, fishery, military, and environmental protection fields will help promote the development of related technologies. In terms of operational safety and efficiency in complex aquatic environments, continuous optimization of battery technology, intelligent control systems, and material applications will improve safety and efficiency.

[0049] In practice The implementation principle of a symmetrical reversing dual-rotor shaftless propulsion device according to an embodiment of this application is as follows: The main body 5 is powered by the battery pack 204 of the energy storage unit 2 to the motor 306. After the motor 306 is started, its output end drives the first spur gear 308 to rotate through the mechanical seal mechanism 313, which in turn drives the second spur gear 309 and the third spur gear mechanical seal mechanism to rotate. The third spur gear mechanical seal mechanism meshes with the first gear ring 311 on the first rotating ring 304, while the first spur gear 308 meshes with the second gear ring 312 on the second rotating ring 305, thereby driving the two rotating rings and the blades inside to rotate synchronously, pushing the water flow forward with thrust. The entire device is buoyed by the hydrofoil 1, whose curved bottom surface reduces resistance. The intermediate plate 101 and the wing plate 102 constitute the main body, and the placement groove 103 is used for the main body 5. The design completely avoids the hidden danger of easy entanglement of traditional shaft systems and improves underwater safety.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A symmetrical, reversible, dual-rotor shaftless propulsion system, characterized in that: It includes a main body (5), a hydrofoil (1), and a remote control unit (4); the main body (5) includes an energy storage unit (2) and a propulsion unit (3), the propulsion unit (3) includes a motor housing (301), a first housing (302), and a second housing (303), a motor (306) is installed on the inner side of the motor housing (301), the output end of the motor (306) is connected to a first spur gear (308) through a mechanical sealing mechanism (313), and a second gear (309) is meshed on the outer side of the first spur gear (308); The inner sides of the first housing (302) and the second housing (303) are provided with a first rotating ring (304) and a second rotating ring (305), and the inner sides of the first rotating ring (304) and the second rotating ring (305) are arranged with a plurality of blades in a ring array; The first rotating ring (304) and the second rotating ring (305) are respectively provided with a first gear ring (311) and a second gear ring (312). The first spur gear (308) meshes with the second gear ring (312) for transmission, and the second gear 309 meshes with the first gear ring (311) for transmission, so as to realize the synchronous reverse rotation of the two rotating rings.

2. The shaftless thruster according to claim 1, characterized in that: The first outer shell (302) and the second outer shell (303) are assembled and connected, and the first rotating ring (304) and the second rotating ring (305) are mirror-distributed on the inner sides of the first outer shell (302) and the second outer shell (303).

3. The shaftless thruster according to claim 1, characterized in that: The hydrofoil (1) includes a middle plate (101), and wing plates (102) are mirror-inserted on both sides of the middle plate (101). The middle plate (101) is provided with a placement groove (103) for mounting the body (5) and is locked by a device.

4. The shaftless thruster according to claim 1, characterized in that: The main body (5) has mounting holes, which can be used to install hydrofoils or connecting plates (503).

5. The shaftless thruster according to claim 1, characterized in that: The energy storage unit (2) includes a housing (201) which is mounted on the propulsion unit 3, and a plurality of battery packs (204) are installed on the inner side of the housing (201).

6. The shaftless thruster according to claim 5, characterized in that: The battery pack (204) includes several battery groups (2041). An end cap (202) is sealed at the front end of the casing (201), and a tail cap (203) is sealed at the rear end of the casing (201). A handle is provided on the surface of the end cap (202). The battery pack (2041) is installed obliquely on the battery pack (204) bracket, and the battery pack (204) can be inserted and removed into the energy storage section (2) of the main body (5).

7. The shaftless thruster according to claim 6, characterized in that: The tail cap (203) is sealed to the motor housing (301). The motor (306) is controlled by an electronic controller. The electronic controller is electrically connected to the battery pack (204) and can adjust the motor according to the control signal of the operator's handheld remote control (4). The power part of the motor and the battery and control part are independent sealed cavities.

8. The shaftless thruster according to claim 1, characterized in that: The remote control unit (4) includes at least one control switch. The remote control unit (4) communicates wirelessly with the main body (5) via wireless signals to remotely command the motor (306) to work.

9. The shaftless thruster according to claim 1, characterized in that: The remote control unit (4) is located at both ends of the connecting plate and can be installed at different positions on the main body via the connecting plate (503), and can also be used as a handle for a submersible.

10. The shaftless thruster according to claim 9, characterized in that: Different sizes of counterweights can be installed on the connecting plate (503) to adjust the buoyancy; or installed on the bottom of the ship for the ship's power.

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