Underwater propelling device

Abstract

The utility model discloses an underwater propelling device which comprises a propelling device body, a control circuit and a motor, and the motor is electrically connected with a battery pack and the control circuit. The propelling device comprises a propelling device body and is characterized in that the propelling device body comprises a shell, the shell is of a streamline structure, a noise reduction structure, a power assembly and a control circuit are arranged in the shell, and the shell is connected with a protective shell through a protective net; one end of the protective shell is connected with the protective net, the other end of the protective shell is provided with a protective grating, and the side wall of the protective shell is provided with symmetrically designed handles; the power assembly is electrically connected with the control circuit; the control circuit is used for controlling starting and speed adjustment of the power assembly; a propeller is connected between the outer shell and the protective shell through a rotating shaft. And by arranging the noise reduction structure, noise generated during operation of the motor is effectively reduced, and hearing impairment of an operator in the long-time use process is prevented.

Description

Technical Field

[0001] This utility model relates to the field of underwater equipment technology, and in particular to an underwater propulsion device. Background Technology

[0002] An underwater propulsion device is a device used to generate thrust in water, enabling objects such as submersibles, unmanned vessels, and underwater robots to move. It is based on Newton's third law of physics, which states that for every action, there is an equal and opposite reaction. Thrust is generated through specific mechanical or hydraulic mechanisms. Underwater propulsion devices are mainly divided into waterjet propulsion systems, waterjet propulsion systems, and electric propulsion systems. With continuous technological development, underwater propulsion devices are playing an increasingly important role in fields such as ocean exploration, resource exploration, environmental monitoring, and disaster relief. For example, in marine engineering, underwater propulsion devices can be used for laying submarine cables and pipelines; in diving operations, they can provide power support for divers; in underwater exploration, they can carry various detection equipment for underwater topographic mapping and resource exploration; and in military reconnaissance, they can serve as the power source for unmanned underwater vehicles, performing tasks such as intelligence gathering and target tracking. With continuous technological advancements and innovations, the performance and efficiency of underwater propulsion devices will continue to improve, providing stronger support for human exploration of the ocean and utilization of marine resources.

[0003] Currently, a search reveals that Chinese patent CN216909100U discloses an underwater propulsion device, including a pressure-resistant shell, a motor, a propeller assembly, a protective cover, a safety indicator light, and a power switch. While this patent can reduce drag, it still has the following technical drawbacks:

[0004] On the one hand, the lack of noise reduction mechanisms means that underwater propulsion devices often generate high decibel levels of noise during operation, far exceeding the natural background noise of the general underwater environment. Some propulsion devices, especially those using high-speed rotating components, may produce sharp and piercing noise that can cause auditory discomfort. On the other hand, when underwater propulsion devices move in the water, the interaction between their surface and the water flow generates resistance. This resistance increases with the increase of water flow speed, thus consuming more energy. An unreasonable shape design can also increase turbulence and eddies on the device surface, further increasing resistance. Because the device has a warning light at the front, this light can affect the overall drag reduction design, increasing turbulence and eddies on the device surface and thus increasing resistance.

[0005] Another issue is that the handheld part is not equipped with an anti-slip mechanism for underwater operation. Because the friction between the liquid and the object surface is low when operating underwater, the operator is prone to losing their hand when using the device, and needs to use a large grip force to hold it. This can easily cause operator fatigue after prolonged use.

[0006] In view of the numerous defects and shortcomings of the above-mentioned underwater propulsion devices, such as high noise, poor drag reduction effect and insufficient anti-slip effect, the key to solving the above technical problems lies in developing a more practical and efficient underwater propulsion device. Summary of the Invention

[0007] In view of the many defects and deficiencies in the above-mentioned background technology, this utility model has made improvements and innovations, with the aim of providing an underwater propulsion device. By setting a noise reduction structure inside the shell, the noise during motor operation is reduced, effectively avoiding auditory discomfort for operators after long-term use.

[0008] Another objective of this invention is to reduce the turbulence and eddies of water flow on the device surface by setting a streamlined outer shell and covering the outer shell surface with a drag-reducing coating, thereby reducing resistance. Furthermore, by setting a uniformly distributed microporous structure on the propeller, the surface roughness of the propeller is increased, improving the surface hydrophobicity. At the same time, the air film generated between the micropores further reduces resistance, allowing the underwater propulsion device to operate better.

[0009] Another objective of this invention is to increase the friction between the handle and the operator's hand by installing an anti-slip ring on the handle, with anti-slip texture on the outer wall of the anti-slip ring, thereby preventing the underwater propulsion device from slipping out of the hand during underwater operations.

[0010] To solve the above problems and achieve the objectives of the invention, this utility model provides an underwater propulsion device by employing the following design mechanism and the following technical solution:

[0011] An underwater propulsion device includes a propulsion device body, a control circuit 4, and a motor 31. The motor 31 is electrically connected to a battery pack 32 and the control circuit 4. The propulsion device body includes:

[0012] The outer shell 1 has a streamlined structure and is equipped with a noise reduction structure 11, a power component 3 and a control circuit 4 inside. The outer shell 1 is connected to the protective shell 2 through a protective net 21.

[0013] Protective shell 2, one end of which is connected to protective net 21, and the other end is provided with protective grille 23. Its side wall is provided with symmetrically designed handles 22.

[0014] Power assembly 3 is electrically connected to control circuit 4 and is used to drive propeller 24 to rotate.

[0015] Control circuit 4 is used to control the opening and speed regulation of power component 3;

[0016] A propeller 24 is connected between the outer shell 1 and the protective shell 2 via a rotating shaft 33.

[0017] Preferably, the power assembly 3 includes a battery pack 32, which is connected to the end face of the motor 31 through a noise reduction structure 11 and is electrically connected to the charging assembly 321.

[0018] The charging component 321 is disposed on the side wall of the housing 1 and is sealed to the housing 1, and includes a charging port, a charging indicator light and a sealing cover 3211.

[0019] Rotating shaft 33, one end of which is fixedly connected to motor 31, and the other end passes through propeller 24 and protective grille 23 and is connected to fixing member 331;

[0020] The rotating shaft 33 has a "T-shaped" limiting structure on its side wall, which works in conjunction with the mounting hole of the propeller 24 to enable the motor 31 to drive the rotating shaft 33, thereby driving the propeller 24 to rotate.

[0021] Preferably, the noise reduction structure 11 is installed between the motor 31 and the battery pack 32 to reduce the noise generated by the motor 31 during operation;

[0022] The upper shell 13 has a ring-shaped fixing frame 131 inside the upper shell 13. The fixing frame 131 has several grooves that work with the noise reduction structure 11, and its outer wall is covered with a drag reduction coating 12.

[0023] The lower shell 14 is sealed to the upper shell 13. The side wall of the lower shell 14 is provided with an installation groove 141 for embedding one end of the protective net 21 and a charging component 321. Its outer wall is covered with a drag-reducing coating 12. The end of the lower shell 14 is provided with a rubber ring 142. The rubber ring 142 has a hole for cooperating with the rotating shaft 33.

[0024] Noise reduction coating 15 is uniformly coated on the inside of the housing 1 to reduce the noise generated during the operation of the power component 3.

[0025] Among them, after the rotating shaft 33 passes through the outer shell 1, the rubber ring 142 seals the inside of the outer shell 1.

[0026] Preferably, the noise reduction structure 11 includes: an upper plate 111, one end of which is connected to the battery pack 32, and the other end is connected to the lower plate 114 via a positioning pin 112;

[0027] The positioning pin 112 is designed in several ways. It has a limiting ring in the middle and a spring 113 is sleeved between the limiting ring and the lower plate 114. One end of the positioning pin 112 passes through the upper plate and is embedded in the groove of the fixing bracket 131, and the other end passes through the lower plate 114 and is connected and fixed to the connector 115.

[0028] Lower plate 114, lower plate 114 is connected to motor 31;

[0029] The lower plate 114 can slide between the limiting ring and the connecting piece 115.

[0030] Preferably, the control circuit 4 includes: a PLC board, a control button 41 and a connecting line 42. The control button 41 includes a switch button 411, an acceleration button 412 and a deceleration button 413, which are located at the thumb contact position on the side wall of any handle 22. The control button 41 is connected to the PLC board through the connecting line 42.

[0031] The PLC board is electrically connected to the motor 31 and the battery pack 32.

[0032] Preferably, the strips 211 on the protective net 21 are hollow tubular structures, which are used in conjunction with the small holes provided on the side wall of the lower shell 14 for wiring.

[0033] Preferably, the handle 22 is fitted with an anti-slip sleeve 221.

[0034] Preferably, the surface of the propeller 24 is uniformly provided with micropores 241.

[0035] Preferably, the drag-reducing coating 12 is a polytetrafluoroethylene coating, a nano-coating, a graphene coating, or a fluorocarbon coating.

[0036] Preferably, the noise-reducing coating 15 is a polymer foam.

[0037] The working principle is as follows: This utility model sets a noise reduction structure 11 between the battery pack 32 and the motor 31 inside the outer casing 1. The noise reduction structure 11 uses a positioning pin 112 between the upper plate 111 and the lower plate 114. One end of the positioning pin 112 is a threaded post that can pass through the upper plate and be embedded in the groove of the fixing bracket 131. The middle part of the positioning pin 112 has an annular structure, and its other end passes through the lower plate and can fix the lower plate by the connector 115. A spring 113 is sleeved on its outer wall so that the lower plate 114 can be fixed between the annular structure and the connector 11. The components slide between the 5, and through the action of the spring 113, the vibration generated during the operation of the motor 31 is transmitted to the positioning pin 112 through the lower plate 114. Under the action of the spring, the lower plate 114 reciprocates between the annular structure and the connecting piece 115 to eliminate the vibration. Then, because the depth of the groove of the fixing frame 131 is greater than the length of the threaded end of the positioning pin 112, when the positioning pin 112 moves upward, the threaded end of the positioning pin 112 reciprocates within the groove of the fixing frame 131, thereby achieving a better vibration elimination effect and reducing noise.

[0038] Meanwhile, a noise-reducing coating 15 is coated inside the outer shell 1. The noise-reducing coating 15 is made of polymer foam or acoustic sponge, etc., which absorbs the noise of the motor 31. Together with the noise-reducing structure 11, it achieves a better noise reduction effect.

[0039] This invention involves longitudinally coating a drag-reducing coating 12 onto the surface of the outer shell 1 until the drag-reducing coating 12 completely covers the surface of the outer shell 1. After solidification, the surface of the drag-reducing coating 12 is polished to make it smooth without burrs or unevenness. Furthermore, by setting uniformly distributed micropores 241 on the propeller 24, the water flow can form a stable air film or vortex on the surface of the micropores 241, thereby reducing the direct contact between the water flow and the surface of the propeller 24 and reducing frictional resistance.

[0040] In summary, the beneficial effects of this utility model compared with the prior art are as follows:

[0041] 1. By setting a noise reduction structure and uniformly coating the inner and outer shells with a noise reduction coating, this utility model can effectively reduce the noise generated by the device during underwater operation and avoid discomfort to the operator's hearing during long-term use.

[0042] 2. This utility model reduces water flow resistance during use by setting a streamlined outer shell and coating the surface of the outer shell with a drag-reducing coating, and by using a microporous design on the propeller.

[0043] 3. Because the handle is equipped with an anti-slip sleeve, the friction between the device and the operator's hand is increased, which effectively prevents the operator from slipping out of their hand during underwater operation due to the smooth surface of the handle.

[0044] 4. Because the protective mesh strip is a hollow tubular structure, the connection wire of the control button can enter the outer shell through the hole in the outer shell from the handle through the strip and connect to the control circuit. The wiring structure is more reasonable and avoids the situation where the connection wire gets tangled during the propeller rotation, causing the control button to fail.

[0045] 5. Because this utility model is equipped with a protective net and a protective grid, the water flow passes through the protective net and the protective grid during use, which reduces resistance and can also prevent debris from getting entangled in the propeller during underwater use, thereby damaging the propeller or motor, and prevent the operator from being injured during operation. Attached Figure Description

[0046] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0047] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0048] Figure 2 This is one of the overall structural schematic diagrams of this utility model;

[0049] Figure 3 This is the second schematic diagram of the overall structure of this utility model;

[0050] Figure 4 This is a cross-sectional view of the overall structure of this utility model;

[0051] Figure 5 This is a schematic diagram showing the connection relationship between the handle 22 and the protective shell 2 of this utility model;

[0052] Figure 6 This is a schematic diagram showing the connection relationship between the outer shell 1 and the protective shell 2 of this utility model;

[0053] Figure 7 This is a schematic diagram showing the connection relationship between the outer shell 1 and the power component 3 of this utility model;

[0054] Figure 8 This is an exploded structural diagram of the noise reduction structure 11 of this utility model;

[0055] Figure 9 This is a schematic diagram of the structure of the control button 41 of this utility model;

[0056] Figure 10 This is a schematic diagram of the propeller 24 structure of this utility model;

[0057] Figure 11 This is a schematic diagram of the structure of embodiment 4 of this utility model;

[0058] Figure 12 This is a schematic diagram of the structure of embodiment 5 of this utility model;

[0059] Figure 13 These are the side view and sectional view of Embodiment 5 of this utility model;

[0060] Figure 14 This is a schematic diagram of the anti-slip sleeve 221 of this utility model;

[0061] In the diagram, the following labels are used: 1—outer shell, 11—noise reduction structure, 12—drag reduction coating, 13—upper shell, 14—lower shell, 15—noise reduction coating, 111—upper plate, 112—positioning pin, 113—spring, 114—lower plate, 115—connector, 116—airbag body, 131—fixed bracket, 132—light strip, 141—mounting groove, 142—rubber ring;

[0062] 2—Protective shell, 21—Protective net, 22—Handle, 23—Protective grille, 24—Propeller, 211—Strip, 221—Anti-slip sleeve, 241—Micropore;

[0063] 3—Power assembly, 31—Motor, 32—Battery pack, 33—Rotating shaft, 321—Charging assembly, 3211—Sealing cover, 331—Fixed component;

[0064] 4—Control circuit, 41—Control button, 42—Connecting wire, 411—Switch button, 412—Increase speed button, 413—Decrease speed button. Detailed Implementation

[0065] To make the technical means, inventive features, and achieved objectives and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0066] Example 1

[0067] like Figures 1 to 11 An underwater propulsion device is shown, comprising a propulsion device body and a control circuit 4. The propulsion device body includes:

[0068] The outer shell 1 has a streamlined structure and is equipped with a noise reduction structure 11, a power component 3 and a control circuit 4 inside. The outer shell 1 is connected to the protective shell 2 through a protective net 21.

[0069] Protective shell 2, one end of which is connected to protective net 21, and the other end is provided with protective grille 23. Its side wall is provided with symmetrically designed handles 22.

[0070] Power component 3 is electrically connected to control circuit 4;

[0071] Control circuit 4 is used to control the opening and speed regulation of power component 3;

[0072] A propeller 24 is connected between the outer shell 1 and the protective shell 2 via a rotating shaft 33.

[0073] Furthermore, the power assembly 3 includes:

[0074] Motor 31 is electrically connected to battery pack 32 and control circuit 4;

[0075] Battery pack 32 is connected to the end face of motor 31 via noise reduction structure 11 and is electrically connected to charging component 321.

[0076] The charging component 321 is disposed on the side wall of the housing 1 and is sealed to the housing 1, and includes a charging port, a charging indicator light and a sealing cover 3211.

[0077] Rotating shaft 33, one end of which is fixedly connected to motor 31, and the other end passes through propeller 24 and protective grille 23 and is connected to fixing member 331;

[0078] The rotating shaft 33 has a "T-shaped" limiting structure on its side wall, which works in conjunction with the mounting hole of the propeller 24 to enable the motor 31 to drive the rotating shaft 33, thereby driving the propeller 24 to rotate.

[0079] Before using one of the underwater propulsion devices with the above-mentioned design structure, the operator must first assemble the device:

[0080] During assembly, the operator first applies a noise-reducing coating 15 evenly to the inside of the outer casing 1, such as... Figure 4 As shown, the battery pack 32 is fixed to the upper plate 111 using bolts. One end of the positioning pin 112 passes through the upper plate 111 and is connected to the fixing bracket 131 on the upper shell 13. The other end of the positioning pin 112 passes through the spring 113 and the lower plate 114 in sequence and is fixed by the connector 115. The rotating shaft 33 and the motor 31 are connected, and the motor 31 is fixed to the end face of the lower plate 114 using bolts. Figure 8 As shown, the battery pack 32, motor 31, and charging assembly 321 are connected using wires. The control circuit 4 is fixed inside the housing 1, and the control circuit 4 is connected to the motor 31 using wires. The upper housing 13 and lower housing 14 are closed. At this time, the rotating shaft 33 passes through one end of the rubber ring 142 of the lower housing 14, as shown. Figure 7 As shown, the rubber ring 142 serves a sealing function, and the drag-reducing coating 12 is evenly applied to the surface of the outer shell 1. Then, bolts are used to fix the handles 22 to the preset positions on the protective shell 2, as shown. Figure 5 As shown, a control button 41 is provided on the handle 22, such as... Figure 3 As shown, one end of the protective net 21 is snapped into the mounting groove 141 of the outer shell 1. The connecting wire 42 of the control button 41 is passed through the handle, through the hollow strip 211 and the hole in the lower shell 14, and connected to the control circuit 4, allowing the operator to operate the control button 41 to switch the motor 31 on and off and adjust its speed. Then, the rotating shaft 33 is passed through the propeller 24 and the protective grille 23 in sequence, and connected to one end of the protective grille 23 by the fastener 331 to limit the rotation of the rotating shaft 33. The other end of the protective net 21 is connected to the protective shell 2, thus completing the assembly of this utility model. In use, as... Figure 1 As shown, the operator holds handle 22 and operates control button 41 to make motor 31 run. At this time, the charging indicator light on charging component 321 is green; it is red when the power is low. When the red light is on, the device needs to be charged with a charging cable. Motor 31 drives rotating shaft 33 to rotate, thereby driving propeller 24 to rotate. During the operation of motor 31, as... Figure 8As shown, the vibration generated by the motor 31 is transmitted to the positioning pin 112 via the lower plate 114. Due to the action of the spring 113, the positioning pin 112 reciprocates to eliminate the vibration. When the positioning pin 112 moves upward, one end of the positioning pin 112 reciprocates within the groove of the fixing bracket 131, thereby eliminating noise. Furthermore, the noise-reducing coating 15 applied inside the outer casing 1 also significantly reduces the noise generated during operation. Figure 10 As shown, the micropores 241 designed on the surface of the propeller 24 effectively reduce noise and resistance, improve hydrodynamic efficiency, and reduce energy loss. At the same time, the streamlined design of the outer shell 1 and the uniform coating of the drag-reducing coating 12 on the surface further enhance the drag reduction effect, enabling the operator to move underwater. The operator can adjust the speed of the motor 31 by operating the control button 41 and other buttons, thereby changing the speed during underwater movement.

[0081] After operation, the operator presses control button 41 to stop motor 31. After drying, the battery pack 32 is charged by inserting the charging cable into the charging port of charging assembly 321. During charging, the charging indicator light is red, and it turns green when fully charged. After charging, the device is stored in a fixed location for future use.

[0082] The control methods described above, which achieve the above functions through control button 41 and PLC board control, are all conventional technologies in this field and do not involve improvements to computer software control. This section only describes the operation process, and the specific principles and methods will not be elaborated here.

[0083] Furthermore, the outer casing 1 includes:

[0084] Noise reduction structure 11 is installed between motor 31 and battery pack 32 to reduce the noise generated by motor 31 during operation;

[0085] The upper shell 13 has a ring-shaped fixing frame 131 inside the upper shell 13. The fixing frame 131 has several grooves that work with the noise reduction structure 11, and its outer wall is covered with a drag reduction coating 12.

[0086] The lower shell 14 is sealed to the upper shell 13. The side wall of the lower shell 14 is provided with an installation groove 141 for embedding one end of the protective net 21 and a charging component 321. Its outer wall is covered with a drag-reducing coating 12, and its end is provided with a rubber ring 142. The rubber ring 142 has a hole for cooperating with the rotating shaft 33.

[0087] Noise reduction coating 15 is uniformly coated on the inside of the housing 1 to reduce the noise generated during the operation of the power component 3.

[0088] Among them, after the rotating shaft 33 passes through the outer shell 1, the rubber ring 142 seals the inside of the outer shell 1.

[0089] In this utility model, such as Figure 7 As shown, the upper shell 13 and the lower shell 14 are sealed together. The charging component 321 and the lower shell 14 are sealed to prevent water ingress. The rubber ring 142 provided at the end of the lower shell 14 seals the inside of the outer shell 1.

[0090] Furthermore, the noise reduction structure 11 includes:

[0091] The upper plate 111 is connected to the battery pack 32 at one end and to the lower plate 114 at the other end via a positioning pin 112.

[0092] The positioning pin 112 is designed in several ways. It has a limiting ring in the middle and a spring 113 is sleeved between the limiting ring and the lower plate 114. One end of the positioning pin 112 passes through the upper plate and is embedded in the groove of the fixing bracket 131, and the other end passes through the lower plate 114 and is connected and fixed to the connector 115.

[0093] Lower plate 114, lower plate 114 is connected to motor 31;

[0094] The lower plate 114 can slide between the limiting ring and the connecting piece 115.

[0095] In this utility model, such as Figure 8 As shown, the vibration generated when the motor 31 is running is transmitted to the positioning pin 112 through the lower plate 114. Due to the action of the spring 113, the positioning pin 112 reciprocates to eliminate the vibration. When the positioning pin 112 moves upward, one end of the positioning pin 112 reciprocates in the groove of the fixing frame 131.

[0096] Example 2

[0097] This embodiment 2 is the same as embodiment 1, except that, as Figure 9 As shown, the control button 41 includes a switch button 411, an acceleration button 412, and a deceleration button 413. The operator turns the motor 31 on and off by operating the switch button 411, increases the speed of the motor 31 by operating the acceleration button 412 to achieve a faster forward speed, and decreases the speed of the motor 31 by operating the deceleration button 413 to achieve a deceleration effect.

[0098] Furthermore, the control circuit 4 includes: a PLC board, a control button 41 and a connecting line 42. The control button 41 includes a switch button 411, an acceleration button 412 and a deceleration button 413, which are located at the thumb contact position on the side wall of any handle 22. The control button 41 is connected to the PLC board through the connecting line 42.

[0099] The PLC board is electrically connected to the motor 31 and the battery pack 32.

[0100] In this utility model, such as Figure 9 As shown, the control button 41 includes a switch button 411, an acceleration button 412, and a deceleration button 413. When the operator presses the switch button 411, the battery pack 32 supplies power to the motor 31, causing the motor 31 to start running. If the speed is insufficient, the operator presses the acceleration button 412, which adjusts the motor speed via the PLC board, thereby increasing the speed of the motor 31. The motor speed has three levels: low speed, medium speed, and high speed. If the motor 31 speed is too fast, the operator presses the deceleration button 413 to downshift, thereby reducing the speed.

[0101] The control methods used by the PLC board to achieve the above functions are all conventional technologies in this field and do not involve improvements to computer software control. Only the operation process is described here, and the specific principles and methods will not be elaborated.

[0102] Example 3

[0103] This embodiment 3 is the same as embodiment 1 and embodiment 2, except that the strip 211 set on the protective net 21 is a hollow tubular structure, which is used in conjunction with the small holes set on the side wall of the lower shell 14 for wiring.

[0104] In this utility model, such as Figure 4 As shown, the strip 211 is set as a hollow tubular structure, so that the connecting wire 42 of the control button 41 can enter the housing 1 from the handle 22 through the strip 211 through the hole opened in the housing 1 and connect to the control circuit 4. The wiring structure is more reasonable and avoids the situation where the connecting wire 42 is entangled during the rotation of the propeller 24, causing the connecting wire 42 to break and the control button 41 to fail.

[0105] Furthermore, the handle 22 is fitted with an anti-slip sleeve 221.

[0106] In this utility model, an anti-slip sleeve 221 is provided on the handle 22, such as Figure 14 As shown, this can prevent the operator from slipping out of their hand due to the smooth surface of the handle 22 during underwater operations.

[0107] Furthermore, the surface of the propeller 24 is uniformly provided with micropores 241.

[0108] In this utility model, such as Figure 10 As shown, the micropores 241 on the surface of the propeller 24 can not only reduce noise and vibration, but also reduce flow resistance by forming an air film through the bubbles attached to the micropores 241. It can also make the propeller lighter and solve the shortcomings of large inertia and slow response caused by the propeller being too thick and heavy.

[0109] Furthermore, the drag-reducing coating 12 is a polytetrafluoroethylene coating, a nano-coating, a graphene coating, or a fluorocarbon coating.

[0110] Furthermore, the noise-reducing coating 15 is a polymer foam.

[0111] Example 4

[0112] This embodiment 4 is the same as embodiments 1 to 3, the only difference being that the upper shell 13 has a ring-shaped light strip 132 on its side wall, such as Figure 11 As shown, the light strip 132 and the battery pack 32 are electrically connected. The operator can turn on the light strip 132 and start the motor 31 by pressing the switch button 411. The light strip illuminates different lights according to different speed levels, for example: yellow light at low speed, blue light at medium speed, and green light at high speed. The light strip 132 can provide illumination for the operator underwater and emit light signals so that other personnel can observe the position of the underwater operator. The design of the light strip 132 being arranged in a ring on the upper shell 13 can effectively avoid the situation where adding lighting components would affect the overall drag reduction effect.

[0113] Example 5

[0114] This embodiment 5 is the same as embodiments 1 to 4, the only difference being that an airbag 116 is provided between the upper plate 111 and the lower plate 114, such as Figure 12 As shown, the airbag body 116 is connected as a whole by bolts passing through the lower plate 114, the fixing nut, and the upper plate 111 in sequence. The airbag body 116 has holes for wires to pass through. Figure 13 As shown, the vibration generated during the operation of the motor 31 is absorbed by the airbag 116, thereby reducing noise. The airbag 116 is filled with air or a soft polymer material.

[0115] In this utility model, the connection is either a fixed connection or a detachable connection. The fixed connection is either a welded connection or a directly machined integral structure, while the detachable connection is either an internal or external threaded connection, a snap-fit ​​connection, or a plug-in structure connection.

[0116] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An underwater propulsion device comprising a propulsion device body and a control circuit (4) and an electric motor (31), the electric motor (31) being electrically connected to a battery pack (32) and to the control circuit (4); characterized in that, The propulsion device body includes: The outer shell (1) has a streamlined structure and is equipped with a noise reduction structure (11), a power component (3) and a control circuit (4) inside. The outer shell (1) is connected to the protective shell (2) through a protective net (21). The protective shell (2) is connected to the protective net (21) at one end and the protective grille (23) at the other end. Its side wall is provided with symmetrically designed handles (22). The power assembly (3) is electrically connected to the control circuit (4) and is used to drive the propeller (24) to rotate; Control circuit (4) is used to control the opening and speed regulation of power component (3); A propeller (24) is connected between the outer shell (1) and the protective shell (2) via a rotating shaft (33).

2. An underwater propulsion device according to claim 1, characterised in that The power assembly (3) includes a battery pack (32), which is connected to the end face of the motor (31) through a noise reduction structure (11) and is electrically connected to the charging assembly (321). The charging component (321) is disposed on the side wall of the housing (1) and is sealed to the housing (1), including a charging port, a charging indicator light and a sealing cover (3211). Rotating shaft (33), one end of rotating shaft (33) is fixedly connected to motor (31), and the other end passes through propeller (24) and protective grid (23) and is connected to fixing part (331); The rotating shaft (33) has a "T-shaped" limiting structure on its side wall, which works in conjunction with the propeller (24) mounting hole so that the motor (31) can drive the rotating shaft (33) and thus drive the propeller (24) to rotate.

3. An underwater propulsion device according to claim 2, wherein, The noise reduction structure (11) is installed between the motor (31) and the battery pack (32) to reduce the noise generated by the motor (31) during operation; The upper shell (13) has a ring-shaped fixing frame (131) inside the upper shell (13). The fixing frame (131) has several grooves that are used in conjunction with the noise reduction structure (11), and its outer wall is covered with a drag-reducing coating (12). The lower shell (14) is sealed to the upper shell (13). The side wall of the lower shell (14) is provided with an installation groove (141) for embedding one end of the protective net (21) and a charging component (321). Its outer wall is covered with a drag-reducing coating (12). The end of the lower shell (14) is provided with a rubber ring (142). The rubber ring (142) has a hole for cooperating with the rotating shaft (33). Noise reduction coating (15) is uniformly coated on the inside of the housing (1) to reduce the noise generated during the operation of the power assembly (3); Among them, after the rotating shaft (33) passes through the outer shell (1), the rubber ring (142) seals the inside of the outer shell (1).

4. An underwater propulsion device according to claim 3, wherein, The noise reduction structure (11) includes: an upper plate (111), one end of which is connected to the battery pack (32), and the other end is connected to the lower plate (114) through a positioning pin (112); The positioning pin (112) has several designs, with a limiting ring in the middle and a spring (113) sleeved between the limiting ring and the lower plate (114). One end of the positioning pin (112) passes through the upper plate and is embedded in the groove of the fixing bracket (131), and the other end passes through the lower plate (114) and is connected and fixed to the connector (115). The lower plate (114) is connected to the motor (31); The lower plate (114) can slide between the limiting ring and the connecting piece (115).

5. An underwater propulsion device according to claim 1, wherein, The control circuit (4) includes: a PLC board, a control button (41) and a connecting line (42). The control button (41) includes a switch button (411), an acceleration button (412) and a deceleration button (413), which are located at the thumb contact position on the side wall of any handle (22). The control button (41) is connected to the PLC board through the connecting line (42). The PLC board is electrically connected to the motor (31) and the battery pack (32).

6. An underwater propulsion device according to claim 3, wherein, The strips (211) on the protective net (21) are hollow tubular structures that work in conjunction with the small holes on the side wall of the lower shell (14) for wiring.

7. An underwater propulsion device according to claim 1, wherein, The handle (22) is fitted with an anti-slip sleeve (221).

8. An underwater propulsion device according to claim 1, wherein, The surface of the propeller (24) is uniformly provided with micropores (241).

9. An underwater propulsion device according to claim 3, wherein, The drag-reducing coating (12) is a polytetrafluoroethylene coating, a nano-coating, a graphene coating, or a fluorocarbon coating.

10. An underwater propulsion device according to claim 3, wherein, The noise-reducing coating (15) is a polymer foam.

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