Shaftless propeller of water surface cleaning machine

Abstract

The utility model provides a shaftless propeller of a water surface cleaning machine, the shaftless propeller is used for pushing the water surface cleaning machine to move in water, the shaftless propeller comprises a shell, a motor rotor, a motor stator and paddles, the shaftless propeller of the water surface cleaning machine directly drives the paddles to rotate through the motor rotor, obstruction of a center shaft is avoided, water flow diffusion is reduced, and the water surface cleaning machine is more stable in water flow. The water flow is more concentrated in the propelling direction, the water flow cavity formed in the motor rotor allows external water flow to penetrate through, it means that the water flow can pass through the propeller more smoothly, obstruction and energy loss of the water flow in the propelling process are reduced, and therefore the propelling efficiency is improved, and the shell is designed to be in the mode that the shell can be fixed to the water surface cleaning machine. The shaftless propeller of the water surface cleaning machine is fixed on the water surface cleaning machine through the shell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water surface cleaning, and in particular to a shaftless propeller of a water surface cleaning machine. BACKGROUND

[0002] In the existing technical field of water surface cleaning, traditional water surface cleaning machines generally use shafted propellers as their power propulsion devices. Such propellers usually include a central shaft on which a paddle is mounted. Through the driving of a motor, the central shaft drives the paddle to rotate, thereby generating a thrust to push the water surface cleaning machine to move in water. However, this traditional shafted propeller design has many deficiencies.

[0003] First, from the perspective of propulsion efficiency, the water flow is diffused in all directions when the traditional shafted paddle rotates and propels, which results in a loss of part of the propulsion force. This water flow diffusion phenomenon not only reduces the propulsion efficiency, but also increases the energy consumption, which is not conducive to the long-term and efficient operation of the water surface cleaning machine.

[0004] Secondly, the traditional shafted propeller is connected between the motor and the paddle through the central shaft, which means that the motor body must be exposed to the humid water environment. In order to ensure the normal operation of the motor and prevent water from entering to cause short circuit or damage, a complex waterproof structure design is usually required for the motor body. This usually requires an additional sealed box to be added to the motor body to isolate the water. However, this additional waterproof structure not only increases the manufacturing cost, but also may cause poor heat dissipation of the motor, further affecting the service life and performance of the motor.

[0005] Therefore, in view of the above technical problems of the traditional shafted propeller of the water surface cleaning machine, it is necessary to develop a new type of shaftless propeller to improve the propulsion efficiency, simplify the waterproof structure, and reduce the manufacturing cost. CONTENT OF THE INVENTION

[0006] Therefore, it is necessary to provide a shaftless propeller of a water surface cleaning machine to solve the above problems.

[0007] Embodiments of the present application provide a shaftless propeller of a water surface cleaning machine for pushing the water surface cleaning machine to move in water, comprising:

[0008] A housing, the shaftless propeller of the water surface cleaning machine allows the housing to be fixed to the water surface cleaning machine;

[0009] A motor rotor, the motor rotor is rotationally connected in the housing, a water flow cavity is formed in the motor rotor, and the shaftless propeller of the water surface cleaning machine allows external water flow to pass through the water flow cavity;

[0010] A motor stator, the motor stator is fixed in the housing, and the motor stator is in transmission connection with the motor rotor.

[0011] a plurality of paddles disposed on the motor rotor and located in the water flow cavity;

[0012] The motor stator drives the motor rotor to rotate on the shell, the motor rotor drives the plurality of paddles to rotate, and the rotation of the paddles drives the water flow to pass through the water flow cavity.

[0013] In at least one embodiment of the present application, the motor rotor has a barrel-shaped portion, both ends of the barrel-shaped portion are rotationally connected to the shell, the motor rotor is rotationally connected to the shell through the barrel-shaped portion, and the motor rotor rotates around the central axis of the barrel-shaped portion;

[0014] The water flow cavity is located in the barrel-shaped portion and communicates with the outside through both ends of the barrel-shaped portion.

[0015] In at least one embodiment of the present application, a placement cavity is formed between the barrel-shaped portion and the shell, and the motor stator is located in the placement cavity.

[0016] In at least one embodiment of the present application, the shell includes a protective shell and two cover plates provided on the protective shell, the motor stator, the motor rotor, and the paddles are located inside the protective shell, the placement cavity is located between the protective shell and the barrel-shaped portion, the length direction of the barrel-shaped portion is the first direction, and the placement cavity communicates with the outside through the protective shell along the first direction.

[0017] The two cover plates are respectively provided on both sides of the protective shell in the first direction, and when the cover plates are provided on the protective shell, the cover plates cut off the communication between the placement cavity and the outside.

[0018] In at least one embodiment of the present application, the shaftless propeller of the water surface cleaning machine further includes two bearings, both of which are sleeved on the barrel-shaped portion, and the motor rotor is rotationally connected to the shell through the bearings.

[0019] In at least one embodiment of the present application, the two bearings are respectively located at both ends of the barrel-shaped portion in the first direction.

[0020] In at least one embodiment of the present application, the motor rotor further includes a limiting portion, the limiting portion is located on the barrel-shaped portion and protrudes outward from the barrel-shaped portion, two positioning members are sleeved on the barrel-shaped portion, and the two positioning members correspond one-to-one to the two bearings.

[0021] Two bearings are respectively located on two sides of the limiting part in the first direction, the positioning member is located between the bearings and the limiting part, and the bearings are located between the positioning member and the cover plate.

[0022] When the cover plate is covered on the protective shell, the positioning member is fixed between the bearings and the limiting part, and the bearings are fixed between the positioning member and the cover plate.

[0023] In at least one embodiment of the present application, the shaftless propeller of the water surface cleaning machine further comprises a stator core, the stator core is arranged on the shell, and the motor stator is fixed between the stator core and the shell.

[0024] In at least one embodiment of the present application, the shaftless propeller of the water surface cleaning machine further comprises a connecting part, the connecting part is arranged outside the shell, and the shaftless propeller of the water surface cleaning machine allows the connecting part to be bolted with the water surface cleaning machine.

[0025] In at least one embodiment of the present application, a wire outlet hole is arranged on the protective shell, and the wire outlet hole is in communication with the inside of the shell and the outside of the shell.

[0026] The above-mentioned shaftless propeller of the water surface cleaning machine directly drives the paddle to rotate through the motor rotor, without the obstruction of the center shaft, reduces the diffusion of water flow, makes the water flow more concentrated in the propulsion direction, the water flow cavity formed in the motor rotor allows the external water flow to penetrate, which means that the water flow can pass through the propeller more smoothly, reduces the obstruction and energy loss of the water flow in the propulsion process, thereby improving the propulsion efficiency, and the shell is designed to be fixed on the water surface cleaning machine, so that the shaftless propeller of the water surface cleaning machine is fixed on the water surface cleaning machine through the shell. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure perspective view of the shaftless propeller of the water surface cleaning machine;

[0028] Figure 2 It is a structure perspective view of the shaftless propeller of the water surface cleaning machine;

[0029] Figure 3 It is a structure perspective view of the shaftless propeller of the water surface cleaning machine;

[0030] Figure 4 It is a top view of the shaftless propeller of the water surface cleaning machine;

[0031] Figure 5 It is Figure 4 It is a sectional view at C-C;

[0032] Figure 6 It is a structure exploded view of the shaftless propeller of the water surface cleaning machine;

[0033] Figure 7 Structure exploded view of shaftless propeller of water surface cleaning machine;

[0034] Figure 8 Structure perspective view of paddle and motor rotor;

[0035] Figure 9 Structure schematic view of shaftless propeller of water surface cleaning machine when arranged on water surface cleaning machine.

[0036] Main component symbol explanation

[0037] 100, shaftless propeller of water surface cleaning machine; 1, shell; 11, protective shell; 12, cover plate; 13, wire outlet hole; 2, motor rotor; 21, water flow cavity; 22, barrel-shaped part; 23, limiting part; 3, motor stator; 4, paddle; 6, bearing; 7, positioning member; 8, stator core; 9, connecting part; A, placement cavity; B, first direction. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0039] It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component or can exist simultaneously with a middle component. When one component is considered to be "arranged" on another component, it can be directly arranged on the other component or can exist simultaneously with a middle component. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and the like used herein are for illustrative purposes only.

[0040] The embodiments of the present application provide a shaftless propeller of water surface cleaning machine for pushing the water surface cleaning machine to move in water, comprising:

[0041] Shell, the shaftless propeller of water surface cleaning machine allows the shell to be fixed on the water surface cleaning machine;

[0042] Motor rotor, the motor rotor is rotationally connected in the shell, a water flow cavity is formed in the motor rotor, and the shaftless propeller of water surface cleaning machine allows external water flow to pass through the water flow cavity;

[0043] Motor stator, the motor stator is fixed in the shell, and the motor stator is in transmission connection with the motor rotor;

[0044] Paddle, a plurality of paddles are arranged on the motor rotor, and the plurality of paddles are located in the water flow cavity;

[0045] The motor stator drives the motor rotor to rotate on the shell, the motor rotor drives the plurality of paddles to rotate, and the rotation of the paddles drives the water flow to pass through the water flow cavity. The shaftless propeller of the water surface cleaning machine provided above directly drives the paddles to rotate through the motor rotor, without the obstruction of the central shaft, reduces the diffusion of the water flow, and makes the water flow more concentrated in the propulsion direction. The water flow cavity formed in the motor rotor allows external water flow to pass through, which means that the water flow can pass through the propeller more smoothly, reduces the obstruction and energy loss of the water flow in the propulsion process, and thus improves the propulsion efficiency. The shell is designed in a style capable of being fixed on the water surface cleaning machine, so that the shaftless propeller of the water surface cleaning machine is fixed on the water surface cleaning machine through the shell.

[0046] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0047] Please refer to Figures 1-9 The embodiments of the present application provide a shaftless propeller 100 of a water surface cleaning machine for propelling the water surface cleaning machine to move in water, comprising:

[0048] A shell 1, the shaftless propeller 100 of the water surface cleaning machine allows the shell 1 to be fixed on the water surface cleaning machine;

[0049] A motor rotor 2, the motor rotor 2 is rotationally connected in the shell 1, a water flow cavity 21 is formed in the motor rotor 2, and the shaftless propeller 100 of the water surface cleaning machine allows external water flow to pass through the water flow cavity 21;

[0050] A motor stator 3, the motor stator 3 is fixed in the shell 1, and the motor stator 3 is in transmission connection with the motor rotor 2;

[0051] A plurality of paddles 4, the plurality of paddles 4 are arranged on the motor rotor 2, and the plurality of paddles 4 are located in the water flow cavity 21;

[0052] The motor stator 3 drives the motor rotor 2 to rotate on the shell 1, the motor rotor 2 drives the plurality of paddles 4 to rotate, and the rotation of the paddles 4 drives the water flow to pass through the water flow cavity 21.

[0053] Specifically, the housing 1, as the main structure of the entire shaftless thruster, protects and supports the internal components. The shaftless thruster is fixed to the water surface cleaning machine via the housing 1, ensuring stable installation and operation. The housing 1 enhances the structural strength and stability of the shaftless thruster, facilitates connection and fixation to the water surface cleaning machine, and provides waterproofing. The motor rotor 2 is the power component of the thruster, responsible for converting electrical energy into mechanical energy. It is rotatably connected to the housing 1 and contains a water flow cavity 21, allowing external water to flow through. The rotation of the motor rotor 2 drives the blades 4, generating thrust. The design of the water flow cavity 21 allows for smooth water flow, improving propulsion efficiency. Located within the motor rotor 2, the water flow cavity 21 is the main channel for water flow. It allows external water to flow through it as the motor rotor 2 rotates, interacting with the blades 4. This improves water utilization and enhances propulsion. Optimizing the design of the water flow cavity 21 can further improve the thruster's performance. The motor stator 3 is the stationary component of the propeller, connected to the motor rotor 2 via a transmission connection. Fixed within the housing 1, it provides electrical energy and drives the motor rotor 2 to rotate. The motor rotor 2, through its interaction with the propeller, converts electrical energy into mechanical energy. The blades 4 are the key component of the propeller, responsible for converting the rotational power of the motor rotor 2 into thrust. Multiple blades 4 are mounted on the motor rotor 2 and located within the water flow cavity 21. The rotation of the blades 4 effectively drives the water flow, generating forward thrust. The number and shape of the blades 4 can be adjusted according to actual needs to optimize the propulsion effect. When the motor stator 3 is energized, it generates a magnetic field that drives the motor rotor 2 to rotate. As the motor rotor 2 rotates, it drives the blades 4 on it to rotate as well. During rotation, the blades 4 interact with the water flow penetrating the water flow cavity 21, generating forward thrust that propels the water surface cleaner in the water. This shaftless propeller is suitable for various water surface cleaning equipment, such as water surface garbage collectors and water surface weeders. It can replace the traditional propeller propulsion method, improving the propulsion efficiency and stability of the equipment.

[0054] In one specific example, the motor rotor 2 has a barrel-shaped portion 22, both ends of which are rotatably connected to the housing 1. The motor rotor 2 is rotatably connected to the housing 1 through the barrel-shaped portion 22, and the motor rotor 2 rotates around the central axis of the barrel-shaped portion 22.

[0055] The water flow cavity 21 is located inside the barrel-shaped part 22, and the water flow cavity 21 passes through both ends of the barrel-shaped part 22 and communicates with the outside.

[0056] Specifically, in the water surface cleaning machine without shaft propeller, the motor rotor 2 is designed to contain a barrel-shaped part 22. This barrel-shaped part 22 is a key component of the motor rotor 2, which presents a hollow cylindrical or approximately cylindrical structure. Both ends of the barrel-shaped part 22 are rotationally connected with the shell 1, which means that the motor rotor 2 can freely rotate around the central axis of the barrel-shaped part 22. The barrel-shaped part 22 provides the necessary structural support for the motor rotor 2, ensuring its stability during rotation. This design helps to reduce vibration and noise, improving the overall performance of the propeller. Inside the barrel-shaped part 22 forms a water flow cavity 21, which is the key channel for water flow through the propeller. The design of the water flow cavity 21 allows external water flow to smoothly pass through it and interact with the blades 4, thereby generating thrust. The central axis of the barrel-shaped part 22 serves as the rotation center of the motor rotor 2, ensuring uniform and smooth rotation. This helps to reduce wear and energy loss, improving propulsion efficiency. The water flow cavity 21 is located inside the barrel-shaped part 22 and extends through both ends of the barrel-shaped part 22, connecting with the outside. This means that water flow can enter the water flow cavity 21 from one end of the propeller, after the rotation of the blades 4, and flow out from the other end. The design of the water flow cavity 21 allows water flow to pass through the propeller according to the predetermined path. This helps to optimize the flow state of water flow, reduce energy loss, and improve propulsion efficiency. The water flow cavity 21 provides an ideal action area for the blades 4. During rotation, the blades 4 can fully contact and interact with the water flow in the water flow cavity 21, thereby generating thrust. During the rotation of the motor rotor 2, due to the current passing and mechanical friction, etc., a certain amount of heat will be generated. The design of the water flow cavity 21 helps to take away this part of the heat, achieving the effect of heat dissipation and cooling, prolonging the service life of the propeller.

[0057] In a specific example, a placement cavity A is formed between the barrel-shaped part 22 and the shell 1, and the motor stator 3 is located in the placement cavity A.

[0058] Specifically, in the water surface cleaning machine without shaft propeller, a specific space is formed between the barrel-shaped part 22 (as part of the motor rotor 2) and the shell 1, which is called the placement cavity A. The placement cavity A is an annular or approximately annular space between the outer wall of the barrel-shaped part 22 and the inner wall of the shell 1, which extends along the length direction of the barrel-shaped part 22. The main function of the placement cavity A is to provide a mounting space for accommodating the motor stator 3. As the stationary part of the propeller, the motor stator 3 needs to be stably fixed in a certain position to interact electromagnetically with the motor rotor 2 (including the barrel-shaped part 22). The placement cavity A meets this requirement. The placement cavity A not only provides a mounting space for the motor stator 3, but also provides necessary structural support and protection. This helps to prevent the motor stator 3 from being damaged or disturbed by vibration during the operation of the propeller. In some designs, the placement cavity A can also serve as part of the heat dissipation channel. When the motor rotor 2 and the motor stator 3 are working, they will generate heat. By reasonably designing the shape and material of the placement cavity A, this part of the heat can be effectively taken away, ensuring the stable operation of the propeller. The motor stator 3 is fixed in the placement cavity A, maintaining a certain gap with the barrel-shaped part 22 (part of the motor rotor 2). This design ensures that the motor stator 3 and the motor rotor 2 can effectively interact electromagnetically, while avoiding direct contact and friction. The electromagnetic interaction between the motor stator 3 and the motor rotor 2 is the basis for the operation of the propeller. When the coils on the motor stator 3 are energized, a magnetic field is generated, which interacts with the permanent magnets or electromagnets on the motor rotor 2, thereby generating a rotating torque to drive the motor rotor 2 to rotate. The interaction between the motor stator 3 and the motor rotor 2 realizes the conversion of electrical energy into mechanical energy. This is the key to the propeller being able to generate thrust. Fixing the motor stator 3 in the placement cavity A helps to improve the stability and reliability of the propeller. This design reduces the vibration and displacement of the motor stator 3 during the operation of the propeller, thereby prolonging the service life of the propeller.

[0059] In a specific example, the shell 1 includes a protective shell 11 and two cover plates 12 covering the protective shell 11, the motor stator 3, the motor rotor 2, and the paddle 4 are located inside the protective shell 11, the placement cavity A is located between the protective shell 11 and the barrel-shaped part 22, and the length direction of the barrel-shaped part 22 is the first direction B, the placement cavity A extends through the protective shell 11 and communicates with the outside along the first direction B;

[0060] The two cover plates 12 are respectively covered on both sides of the protective shell 11 in the first direction B, and when the cover plates 12 are covered on the protective shell 11, the cover plates 12 cut off the communication between the placement cavity A and the outside.

[0061] In particular, the housing 1 of the shaftless propeller of the water surface cleaning machine is composed of two main parts: a protective shell 11 and two cover plates 12. The protective shell 11 is a relatively closed structure that houses the motor stator 3, the motor rotor 2 (including the barrel-shaped part 22), and other key components such as the paddle 4. The two cover plates 12 are respectively placed on the two open ends of the protective shell 11, forming a complete closed space. The main function of the protective shell 11 is to provide a safe and stable environment for housing all the key components of the propeller. This helps to prevent these components from being disturbed or damaged by the external environment. The protective shell 11 provides the necessary structural support for the entire propeller. It ensures that all components can be assembled together in a predetermined manner and maintain a stable working state. The protective shell 11 also prevents water, dust, and other impurities from entering the propeller, thereby prolonging the service life of the propeller and improving its reliability. The two cover plates 12 are respectively placed on the two open ends of the protective shell 11, forming a complete closed space. This helps to prevent external impurities from entering the propeller, while also helping to maintain the cleanliness and dryness of the propeller interior. When the cover plates 12 are placed on the protective shell 11, they cut off the communication between the placement cavity A and the outside world. The placement cavity A is the space formed between the barrel-shaped part 22 and the protective shell 11, used to house the motor stator 3. Cutting off the communication can prevent external impurities from entering the placement cavity A, thereby protecting the motor stator 3 from damage. The design of the cover plates 12 makes it easy to access and maintain the internal components of the propeller. When it is necessary to repair or replace components, the cover plates 12 can be easily removed without the need to disassemble the entire propeller. The placement cavity A is located between the protective shell 11 and the barrel-shaped part 22, it extends along the length direction (denoted as the first direction B) of the barrel-shaped part 22, and penetrates through the protective shell 11 to communicate with the outside world. However, when the cover plates 12 are placed on the protective shell 11, they cut off this communication path. The placement cavity A provides a mounting space for the motor stator 3. This space is large enough to ensure that the motor stator 3 can be stably fixed in the predetermined position and maintain the appropriate gap with the motor rotor 2. Although the placement cavity A is cut off from the outside world after the cover plates 12 are placed, in some designs it can still serve as a heat dissipation and ventilation channel. By reasonably designing the materials, shapes, and structures of the protective shell 11 and the cover plates 12, the heat generated inside the propeller can be effectively removed, and the normal operating temperature of the components can be ensured.

[0062] In a specific example, the shaftless propeller 100 of the water surface cleaning machine further includes two bearings 6, both of which are sleeved on the barrel-shaped part 22, and the motor rotor 2 is rotationally connected with the housing 1 through the bearings 6.

[0063] In particular, in the shaftless propeller 100 of the water surface cleaning machine, two bearings 6 are designed, which are both sleeved on the barrel-shaped part 22. The barrel-shaped part 22, as part of the motor rotor 2, is rotatably connected with the shell 1 through the two bearings 6. This means that the motor rotor 2 (including the barrel-shaped part 22) can rotate freely around its axis without generating excessive friction or wear. The main function of the bearings 6 is to provide rotational support, ensuring that the motor rotor 2 can rotate smoothly and smoothly. They reduce direct contact between the motor rotor 2 and the shell 1, thereby reducing friction and wear, and prolonging the service life of the propeller. Bearings 6 also play a role in positioning and guiding. They ensure that the motor rotor 2 can maintain a predetermined track during rotation and will not deviate from the axis or generate excessive vibration. During the operation of the propeller, the motor rotor 2 will be subjected to various forces and loads from the water flow, the paddle 4 and the motor inside. Bearings 6 can bear these loads and ensure the stable operation of the propeller. Bearings 6 come in many types, including rolling bearings 6, sliding bearings 6, etc. In the shaftless propeller 100 of the water surface cleaning machine, rolling bearings 6 are usually chosen because they have the advantages of small friction coefficient, high carrying capacity, smooth operation, etc. When choosing bearings 6, several factors need to be considered, including the weight, speed, load size and working environment of the motor rotor 2. These factors will directly affect the selection, size and material selection of bearings 6. The installation of bearings 6 needs to follow certain steps and precautions. First of all, it is necessary to ensure the cleanliness and smoothness of the bearing 6 seat and the journal, so that the bearing 6 can be installed smoothly. Secondly, appropriate tools and methods need to be used to press or install the bearing 6 in the predetermined position. Finally, necessary adjustments and checks need to be made to ensure the installation quality and performance of the bearing 6.

[0064] In a specific example, the two bearings 6 are respectively located at two ends of the barrel-shaped part 22 in the first direction B.

[0065] Specifically, in the shaftless propeller 100 of the water surface cleaning machine, two bearings 6 are precisely installed at both ends of the barrel-shaped portion 22. The "first direction B" mentioned here generally refers to the length direction of the barrel-shaped portion 22, that is, the axis direction of the rotation of the motor rotor 2. Therefore, the two bearings 6 are respectively located at the two extreme positions of the barrel-shaped portion 22 in this direction. One bearing 6 is installed at the front end (or one end) of the barrel-shaped portion 22, close to a certain fixed part or input end of the propeller. This bearing 6 mainly bears the load generated at the front end of the motor rotor 2 during rotation, and ensures that the rotor can start rotating smoothly. The other bearing 6 is installed at the rear end (or the other end) of the barrel-shaped portion 22, usually close to the output end or paddle 4 part of the propeller. This bearing 6 mainly bears the load generated at the rear end of the rotor during rotation, including the reaction force generated by the interaction between the paddle 4 and the water flow. Precise installation of the two bearings 6 at both ends of the barrel-shaped portion 22 helps to balance the load generated by the motor rotor 2 during rotation. This can ensure that the rotor remains stable during rotation, reducing vibration and wear. The precise installation position of the bearing 6 is crucial to improving the overall stability of the propeller. They ensure that the motor rotor 2 can remain on the predetermined track during rotation, without deviating from the axis or generating excessive displacement. By reasonably arranging the position of the bearing 6, the direct contact and friction between the motor rotor 2 and the shell 1 can be reduced, thereby prolonging the service life of the propeller. In addition, the lubrication and cooling of the bearing 6 also become easier and more effective. Installing the bearing 6 at both ends of the barrel-shaped portion 22 makes it easier to access and operate when the bearing 6 needs to be repaired or replaced. This helps to reduce downtime and maintenance costs.

[0066] In a specific example, the motor rotor 2 further includes a limiting portion 23 located on the barrel-shaped portion 22 and protruding outward from the barrel-shaped portion 22, and two positioning members 7 are sleeved on the barrel-shaped portion 22, one-to-one corresponding to the two bearings 6;

[0067] The two bearings 6 are respectively located on both sides of the limiting portion 23 in the first direction B, the positioning member 7 is located between the bearing 6 and the limiting portion 23, and the bearing 6 is located between the positioning member 7 and the cover plate 12;

[0068] When the cover plate 12 is covered on the protective shell 11, the positioning member 7 is fixed between the bearing 6 and the limiting portion 23, and the bearing 6 is fixed between the positioning member 7 and the cover plate 12.

[0069] In particular, the motor rotor 2 is one of the core components of the shaftless propeller, which is mainly composed of a barrel-shaped part 22 and a limiting part 23. The barrel-shaped part 22 serves as the main body of the motor rotor 2, usually containing permanent magnets or electromagnets, which are used to interact with the motor stator 3 to generate electromagnetic interaction and achieve rotation. The limiting part 23 is a special structure on the barrel-shaped part 22, which protrudes from the outer side of the barrel-shaped part 22 and is used to limit the axial displacement of the motor rotor 2. The main function of the limiting part 23 is to ensure that the motor rotor 2 does not produce excessive displacement along its axis during rotation. This helps to maintain the constant gap between the motor rotor 2 and the motor stator 3, thereby ensuring the stability and efficiency of electromagnetic interaction. At the same time, the limiting part 23 can also prevent the motor rotor 2 from colliding with the shell 1 or other components under extreme working conditions, thereby protecting the overall structure of the propeller. On the barrel-shaped part 22, two positioning members 7 are sleeved, which correspond to two bearings 6 one by one. The main function of the positioning member 7 is to fix the position of the bearing 6, ensuring that the bearing 6 can stably support the motor rotor 2. At the same time, the positioning member 7 also plays a role in connecting the bearing 6 and the limiting part 23, thereby forming a stable support structure. The two positioning members 7 are located on both sides of the limiting part 23 in the first direction B (i.e. the length direction of the barrel-shaped part 22). This means that each positioning member 7 is located between a bearing 6 and the limiting part 23, ensuring that the bearing 6 can be accurately positioned at the predetermined position. In addition, the positioning member 7 is fixed on the shell 1 or the protective shell 11 through some means (such as bolts, snap rings, etc.), thereby enhancing the stability of the entire support structure. When the cover plate 12 is covered on the protective shell 11, the positioning member 7 is fixed between the bearing 6 and the limiting part 23, and the bearing 6 is fixed between the positioning member 7 and the cover plate 12. This arrangement ensures that the motor rotor 2 can be stably supported and limited during rotation, and also helps to maintain the cleanliness and dryness of the inside of the propeller. The bearing 6 is fixed at the predetermined position through the positioning member 7, providing stable support for the motor rotor 2. This helps to reduce the vibration and displacement of the motor rotor 2 during rotation, thereby improving the stability and reliability of the propeller. The limiting part 23 cooperates with the positioning member 7 to limit the axial displacement of the motor rotor 2, ensuring the constant gap between the motor rotor 2 and the motor stator 3. This helps to maintain the stability and efficiency of electromagnetic interaction, thereby improving the performance of the propeller. When the cover plate 12 is covered on the protective shell 11, they form a closed cavity together with the positioning member 7 and the bearing 6. This helps to prevent external impurities from entering the inside of the propeller, thereby protecting the key components such as the motor rotor 2 and the stator from damage.

[0070] In a specific example, the shaftless propeller 100 of the water surface cleaning machine further comprises a stator core 8, which is arranged on the shell 1, and the motor stator 3 is fixed between the stator core 8 and the shell 1.

[0071] In particular, the shaftless propeller 100 of the water surface cleaning machine, in addition to containing key components such as motor rotor 2, bearing 6, positioning piece 7, etc., also includes stator core 8. The stator core 8 is an important part of the motor, which is usually made up of multiple layers of thin silicon steel sheets to reduce eddy current loss and improve the efficiency of the motor. The stator core 8 is arranged inside the shell 1, opposite the motor rotor 2, providing a solid support for the motor stator 3. The stator core 8 is fixed to the shell 1, usually through bolts, welding or other fastening methods. The motor stator 3 is fixed between the stator core 8 and the shell 1, which means that the motor stator 3 is tightly sandwiched between the stator core 8 and the shell 1, forming a stable electromagnetic field. This electromagnetic field is the basis of the motor's work, which interacts with the permanent magnets or electromagnets in the motor rotor 2 to generate a rotating torque, driving the propeller to work. One of the main functions of the stator core 8 is to support and fix the motor stator 3. It provides a solid base for the motor stator 3, ensuring that the motor stator 3 does not suffer from excessive vibration or displacement during rotation. This helps to maintain the constant gap between the motor stator 3 and the rotor, ensuring the stability and efficiency of electromagnetic interaction. The stator core 8 is made up of multiple layers of thin silicon steel sheets, which helps to reduce eddy current loss. Eddy current loss is a common energy loss in motors, which can cause the efficiency of the motor to decrease and the temperature to rise. By reducing eddy current loss, the stator core 8 can significantly improve the efficiency of the motor, reduce energy consumption, and prolong the service life of the motor. When the motor is powered on, the stator core 8, together with the motor stator 3, forms a powerful electromagnetic field. This electromagnetic field interacts with the permanent magnets or electromagnets in the motor rotor 2 to generate a rotating torque. This torque is the key force that drives the propeller to work, enabling the motor rotor 2 to rotate smoothly and efficiently. The fixed relationship between the stator core 8 and the shell 1 is crucial to the stability and reliability of the motor. The fastening method between them needs to ensure that the motor does not produce excessive vibration or displacement during high-speed rotation. At the same time, the gap between the stator core 8 and the shell 1 also needs to be precisely controlled to ensure the stability and efficiency of the electromagnetic field.

[0072] In a specific example, the shaftless propeller 100 of the water surface cleaning machine also includes a connecting part 9 arranged outside the shell 1, allowing the connecting part 9 to be bolted to the water surface cleaning machine.

[0073] In particular, the shaftless propeller 100 of the water surface cleaning machine, in addition to containing key components such as motor rotor 2, stator core 8, bearing 6, positioning piece 7, etc., also includes a connecting part 9. This connecting part 9 is designed on the outside of the shell 1, which serves as an interface or connection point for connecting the shaftless propeller with other parts of the water surface cleaning machine. The connecting part 9 is usually located at a position of the shell 1 that is easy to access and operate, in order to facilitate installation and maintenance. Its main function is to provide a reliable connection point, so that the shaftless propeller can be fixed to the main body or other components of the water surface cleaning machine through bolt connection or other means. This connection method is both firm and convenient, ensuring that the shaftless propeller will not fall off or shift during operation. The main role of the connecting part 9 is to fix and support the shaftless propeller. By bolt connecting the connecting part 9 with the water surface cleaning machine, it can ensure that the shaftless propeller maintains a stable position and posture during operation. This is crucial for improving the efficiency and reliability of the propeller, as it ensures that the propeller can correctly interact with the water flow to generate the required thrust. The design of the connecting part 9 also takes into account the convenience of installation and maintenance. Through bolt connection, the shaftless propeller can be easily disassembled and replaced, which is very important for the maintenance and upgrading of the equipment. In addition, the connecting part 9 can also serve as a marker to help operators quickly find the installation position of the propeller, thereby simplifying the installation process. The design of the connecting part 9 also has a certain flexibility, which can adapt to different models and specifications of water surface cleaning machines. This means that the shaftless propeller can be used as a universal component in a variety of different water surface cleaning equipment, thereby improving the compatibility and replaceability of the equipment. Bolt connection is a commonly used connection method, which has the characteristics of firmness and reliability. Through appropriate tightening torque, it can ensure that the connection between the connecting part 9 and the water surface cleaning machine is tight and stable, and is not easy to loosen or fall off. Bolt connection also has the advantage of easy disassembly. When maintenance or replacement of the shaftless propeller is required, the connecting part 9 can be easily disassembled by loosening the bolts, thereby simplifying the maintenance process.

[0074] In a specific example, the protective shell 11 has a wire outlet hole 13, which communicates between the inside of the shell 1 and the outside of the shell 1.

[0075] In particular, the wire exit hole 13 is located at a certain position of the protective shell 11, which is usually carefully designed to ensure that it neither interferes with the normal operation of the propeller nor facilitates the passage of the wire or cable. The wire exit hole 13 can be located on the side, top or bottom of the protective shell 11, depending on the design and installation requirements of the propeller. The main function of the wire exit hole 13 is to connect the inside and outside of the protective shell 11, allowing the wire or cable to pass from the inside of the protective shell 11 and connect to the external power supply or control system. This is crucial for the power supply and control of the propeller, as it ensures that the motor can receive the necessary power signal to drive the propeller to work. When designing the wire exit hole 13, special attention should be paid to its sealing. Since the main purpose of the protective shell 11 is to prevent external moisture, dirt and other impurities from entering the propeller, the wire exit hole 13 must be designed tightly enough to prevent these impurities from entering through the gap. Usually, the wire exit hole 13 will be equipped with a sealing pad or gasket to ensure that the wire or cable does not damage the seal when passing through. The size and shape of the wire exit hole 13 also need to be carefully designed according to the specifications of the wire or cable. The hole diameter must be large enough to accommodate the diameter of the wire or cable, but not too large to reduce the sealing effect or allow too much impurity to enter. In terms of shape, the wire exit hole 13 is usually designed as a circle or oval to facilitate the smooth passage of the wire or cable. The location of the wire exit hole 13 is also an important consideration in the design. It should be located in a position that is convenient for the connection of the wire or cable, while avoiding interference with other parts of the propeller. In addition, if the propeller needs to be installed at a specific angle or direction, the location of the wire exit hole 13 also needs to be adjusted accordingly.

[0076] The above is only an embodiment of the present application, and it should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present application, but these are within the scope of protection of the present application.

Claims

1. A shaftless propeller of a water surface cleaning machine for propelling the water surface cleaning machine to move in water, characterized in that, The water surface cleaning machine comprises: a shell, the shaftless propeller of the water surface cleaning machine allows the shell to be fixed on the water surface cleaning machine; a motor rotor, the motor rotor is rotationally connected in the shell, a water flow cavity is formed in the motor rotor, and the shaftless propeller of the water surface cleaning machine allows external water flow to pass through the water flow cavity; a motor stator, the motor stator is fixed in the shell, and the motor stator is in transmission connection with the motor rotor; a plurality of paddles, the plurality of paddles are arranged on the motor rotor and located in the water flow cavity; the motor stator drives the motor rotor to rotate on the shell, the motor rotor drives the plurality of paddles to rotate, and the rotation of the paddles drives water flow to pass through the water flow cavity.

2. Shaftless propeller of a water surface cleaning machine according to claim 1, characterized in that The motor rotor has a barrel-shaped part, both ends of the barrel-shaped part are rotationally connected to the shell, the motor rotor is rotationally connected to the shell through the barrel-shaped part, and the motor rotor rotates around the central axis of the barrel-shaped part. The water flow cavity is located in the barrel-shaped part and communicates with the outside through both ends of the barrel-shaped part.

3. Shaftless propeller of a water surface cleaning machine according to claim 2, characterized in that A placement cavity is formed between the barrel-shaped part and the shell, and the motor stator is located in the placement cavity.

4. Shaftless propeller of a water surface cleaning machine according to claim 3, characterized in that The shell comprises a protective shell and two cover plates arranged on the protective shell, the motor stator, the motor rotor and the paddles are located on the inner side of the protective shell, the placement cavity is located between the protective shell and the barrel-shaped part, the length direction of the barrel-shaped part is the first direction, and the placement cavity communicates with the outside through the protective shell along the first direction. The two cover plates are respectively arranged on both sides of the protective shell in the first direction, and the cover plates cut off the communication between the placement cavity and the outside when the cover plates are arranged on the protective shell.

5. Shaftless propeller of a water surface cleaning machine according to claim 4, characterized in that The shaftless propeller of the water surface cleaning machine further comprises two bearings, the two bearings are sleeved on the barrel-shaped part, and the motor rotor is rotationally connected to the shell through the bearings.

6. Shaftless propeller of a water surface cleaning machine according to claim 5, characterized in that The two bearings are respectively located at both ends of the barrel-shaped part in the first direction.

7. The shaftless thruster of a water surface cleaning machine according to claim 5, characterized in that The motor rotor further comprises a limiting part, the limiting part is located on the barrel-shaped part and protrudes from the outer side of the barrel-shaped part, two positioning members are sleeved on the barrel-shaped part, and the two positioning members correspond to the two bearings one by one. The two bearings are respectively located on both sides of the limiting part in the first direction, the positioning members are located between the bearings and the limiting part, and the bearings are located between the positioning members and the cover plates. When the cover plates are arranged on the protective shell, the positioning members are fixed between the bearings and the limiting part, and the bearings are fixed between the positioning members and the cover plates.

8. The shaftless thruster of a water surface cleaning machine according to claim 1, characterized in that, The shaftless propeller of the water surface cleaning machine further comprises a stator core, the stator core is arranged on the shell, and the motor stator is fixed between the stator core and the shell.

9. The shaftless thruster of a water surface cleaning machine according to claim 1, characterized in that, The shaftless propeller of the water surface cleaning machine further comprises a connecting part, the connecting part is arranged on the outer side of the shell, and the shaftless propeller of the water surface cleaning machine allows the connecting part to be bolted with the water surface cleaning machine.

10. The shaftless thruster of a water surface cleaning machine according to claim 4, characterized in that, A wire outlet hole is arranged on the protective shell, and the wire outlet hole communicates the inner side of the shell with the outer side of the shell.

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