Underwater steering engine with sealing structure

Abstract

The utility model relates to underwater rudder motor technical field, concretely is a kind of underwater rudder motor with sealing structure, by being provided with first sealing ring and coating sealant at the connecting place of rudder motor main body and waterproof joint, to form the composite sealing structure of mechanical and chemical combination, it is favorable to the cooperation gap between the plugging of rudder motor main body and waterproof joint, it is helpful to improve the waterproof reliability of connecting part, prevent the moisture infiltration inside rudder motor main body occurs, effectively solved the sealing structure between cable connector and threading hole in the existing underwater rudder motor is often relatively simple, make the existence of subtle gap at the connecting place of rudder motor shell and wire rod, water is easy to enter under long-term use or complex water pressure environment, lead to circuit board damage problem.

Description

Technical Field

[0001] This utility model relates to the field of underwater servo technology, specifically an underwater servo with a sealed structure. Background Technology

[0002] An underwater servo is a high-precision power actuator adapted to the underwater environment and designed specifically for underwater vehicles. Its core function is to receive commands from the control system and drive the rudder or related actuators to deflect precisely, thereby achieving course adjustment, attitude stabilization and depth control of the vehicle. It is a key device to ensure the flexible maneuverability and safe operation of underwater vehicles.

[0003] Existing underwater servos typically consist of a servo housing and cables. The servo housing contains a circuit board, and one side of the housing has a cable hole for connecting the cables. The cables include an integrally formed cable connector, which is installed in the cable hole, allowing the cables to be electrically connected to the circuit board inside the servo housing. However, because the sealing structure between the cable connector and the cable hole is often quite simple, there are tiny gaps at the connection between the servo housing and the cables. Under long-term use or in complex water pressure environments, water can easily enter, leading to damage to the circuit board.

[0004] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0005] The aforementioned problem arises from the simple sealing structure between the cable connector and the cable hole in existing underwater servos, resulting in minute gaps at the connection between the servo housing and the cable. This gaps make the servo housing susceptible to water ingress during prolonged use or under complex water pressure conditions, potentially damaging the circuit board. The technical solution adopted by this invention to address this problem is as follows: An underwater servo with a sealed structure includes a servo body and a waterproof connector for introducing a wire. The waterproof connector is connected to the servo body, and the wire passes through the waterproof connector and is electrically connected to a circuit board inside the servo body. A first sealing ring is provided at the connection between the servo body and the waterproof connector, and sealant is applied to the mating surface at the connection to form a composite sealing structure.

[0006] Furthermore, the waterproof connector includes a clamping end cap and a connector base. The connector base is connected to the servo motor body, the clamping end cap is connected to the connector base, and the connection between the clamping end cap and the connector base is coated with sealant.

[0007] Furthermore, a second elastic sealing block is provided between the clamping end cap and the connector base. When the clamping end cap is connected to the connector base, the second elastic sealing block is squeezed and undergoes elastic deformation to seal the gap between the wire and the interior of the waterproof connector. The joint between the clamping end cap and the wire is coated with sealant.

[0008] Furthermore, the servo motor body includes a bottom cover and a main housing, a third sealing ring is provided between the bottom cover and the main housing, and sealant is applied at the connection between the bottom cover and the main housing.

[0009] Furthermore, the servo motor body includes a top cover, a fourth sealing ring is provided between the top cover and the main housing, and sealant is applied at the connection between the top cover and the main housing.

[0010] Furthermore, the bottom cover and the main housing are arranged vertically, and the waterproof connector is located on the side of the bottom cover away from the main housing and extends vertically.

[0011] Furthermore, the waterproof connector is disposed on the periphery of the main housing and extends in a horizontal direction.

[0012] Furthermore, the servo motor body includes a servo motor and a power output shaft. The power output shaft is connected to the output shaft of the servo motor. The main housing has a mounting groove on the side near the top cover for mounting the servo motor output shaft and the power output shaft. The power output shaft has a first retaining ring, a second retaining ring, and several fifth sealing rings located between the first and second retaining rings. The connection between the mounting groove, the servo motor output shaft, and the power output shaft is sealed with an oil seal.

[0013] Furthermore, a connecting screw is provided between the bottom cover and the main housing. The connecting screw passes through the bottom cover and is threaded to the main housing. A sixth sealing ring is fitted on the connecting screw, and sealant is applied to the mating surface between the connecting screw and the bottom cover.

[0014] Furthermore, the surface of the circuit board inside the servo motor body is covered with a sealant layer.

[0015] The beneficial effects of this utility model are as follows: This invention creates a composite sealing structure combining mechanical and chemical processes by setting a first sealing ring and applying sealant at the connection between the servo motor body and the waterproof connector. This helps to seal the gap between the servo motor body and the waterproof connector, improves the waterproof reliability of the connection, and prevents water from seeping into the servo motor body. It effectively solves the problem that the sealing structure between the cable connector and the wire hole in existing underwater servos is often too simple, resulting in a small gap at the connection between the servo motor housing and the wire. Under long-term use or complex water pressure environments, this gap can easily lead to water ingress and damage to the circuit board.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of the underwater servo motor of this utility model; Figure 2 This is one of the exploded view diagrams of the underwater servo motor of this utility model; Figure 3 This is the second exploded view of the underwater servo motor of this utility model; Figure 4 This is the third exploded view of the underwater servo motor of this utility model; Figure 5 This is the second schematic diagram of the underwater servo mechanism of this utility model. Detailed Implementation

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1 to 5 The underwater servo motor with a sealed structure shown includes a servo motor body 1 and a waterproof connector 2 for introducing a wire 3. The waterproof connector 2 is connected to the servo motor body 1. The wire 3 passes through the waterproof connector 2 and is electrically connected to a circuit board inside the servo motor body 1. A first sealing ring 41 is provided at the connection between the servo motor body 1 and the waterproof connector 2, and sealant is applied to the mating surface at the connection to form a composite sealing structure. This invention creates a composite sealing structure combining mechanical and chemical processes by setting a first sealing ring and applying sealant at the connection between the servo motor body and the waterproof connector. This helps to seal the gap between the servo motor body and the waterproof connector, improves the waterproof reliability of the connection, and prevents water from seeping into the servo motor body. It effectively solves the problem that the sealing structure between the cable connector and the wire hole in existing underwater servos is often too simple, resulting in a small gap at the connection between the servo motor housing and the wire. Under long-term use or complex water pressure environments, this gap can easily lead to water ingress and damage to the circuit board.

[0020] Furthermore, the sealant works synergistically with the first sealing ring 41 to resist vibration and wear during long-term use, while also withstanding water pressure impacts at different depths, maintaining a sealing effect even in complex water pressure environments.

[0021] Optionally, in some embodiments, the sealant applied to the connection between the servo motor body 1 and the waterproof connector 2 is a silicone sealant. This sealant cures at room temperature by absorbing moisture from the air, forming a soft and elastic rubber-like sealing layer that can adapt to the slight deformation of metal or engineering plastic materials caused by temperature changes. It also has good adhesion to a variety of substrates and can maintain stable sealing performance even after long-term immersion in water.

[0022] Optionally, in some embodiments, the sealant applied to the connection between the servo motor body 1 and the waterproof connector 2 is a polyurethane sealant. After curing, the sealant forms a highly elastic sealing layer with a large elongation, which can effectively absorb the structural stress caused by water flow disturbance or mechanical vibration and prevent the sealing interface from failing due to fatigue cracking. Secondly, its molecular structure is dense and has good barrier properties against liquid water and water vapor.

[0023] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the sealant applied to the connection between the servo motor body 1 and the waterproof connector 2 is an anaerobic sealant. This sealant remains liquid in an oxygen-rich environment, making it easy to apply and assemble. When the waterproof connector 2 and the servo motor body 1 are tightened together by threads, the sealant is sealed in the oxygen-free metal-metal mating gap, and then undergoes a polymerization reaction to solidify, forming a strong and dense sealing layer that effectively prevents moisture from seeping in along the thread gap, while also providing a certain degree of anti-loosening function.

[0024] like Figures 1 to 5 The waterproof connector 2 shown includes a clamping end cap 21 and a connector base 22. The connector base 22 is connected to the servo motor body 1, the clamping end cap 21 is connected to the connector base 22, and the connection between the clamping end cap 21 and the connector base 22 is coated with sealant. Furthermore, applying sealant to the mating surfaces of the compression end cap 21 and the connector base 22 can effectively fill the tiny gaps and surface defects between them, blocking the path of water seepage into the interior of the waterproof connector 2, thereby significantly improving the sealing integrity of the waterproof connector 2 itself and preventing water from entering the underwater servo motor due to leakage of the connector structure.

[0025] Furthermore, the sealant has good flowability and interfacial adhesion, which can compensate for the unevenness of the mating surfaces between the compression end cap 21 and the joint base 22 caused by manufacturing tolerances or assembly deviations. This helps to reduce the requirements for the machining accuracy of parts and helps to ensure sealing performance while improving product production consistency and yield.

[0026] Optionally, the connector base 22 and the servo motor body 1 can be connected by threaded connection, snap-fit ​​connection, slot connection, or other connection methods.

[0027] Optionally, the clamping end cap 21 and the connector base 22 can be connected by threaded connection, snap-fit ​​connection, slot connection, or other connection methods.

[0028] Optionally, in some embodiments, the sealant applied at the connection between the compression end cap 21 and the connector base 22 is a silicone sealant. This sealant cures at room temperature by absorbing ambient moisture, forming a rubber-like sealing layer with excellent elasticity and weather resistance. It can adapt to the slight deformation of metal or engineering plastic parts caused by temperature changes and maintain stable sealing performance even after long-term immersion in water.

[0029] Optionally, in some embodiments, the sealant applied at the connection between the compression end cap 21 and the connector base 22 is a polyurethane sealant. After curing, the sealant has high elongation and excellent impact resistance, which can effectively absorb the structural stress caused by water flow disturbance or mechanical vibration during underwater operations and prevent the sealing interface from failing due to fatigue cracking.

[0030] Preferably, the sealant applied at the connection between the clamping end cap 21 and the connector base 22 is an anaerobic sealant. This sealant remains liquid in an oxygen-rich environment, which facilitates assembly operations. When the clamping end cap 21 and the connector base 22 are fastened together by threads, the sealant is in an oxygen-free metal-metal mating gap and then solidifies to form a dense sealing layer, effectively preventing moisture from seeping in along the threads.

[0031] like Figures 1 to 5 A second elastic sealing block 42 is provided between the clamping end cap 21 and the connector base 22. When the clamping end cap 21 is connected to the connector base 22, the second elastic sealing block 42 is squeezed and undergoes elastic deformation to seal the gap between the wire 3 and the interior of the waterproof connector 2. The joint between the clamping end cap 21 and the wire 3 is coated with sealant. Furthermore, the second elastic sealing block 42 fills the gap between the wire 3 and the waterproof connector 2 by squeezing and deforming, thereby achieving a physical seal; secondly, the sealant at the joint between the pressing end cap 21 and the wire 3 fills the tiny gaps at the joint, thereby forming a chemical seal. The double protection blocks moisture penetration from different dimensions.

[0032] Furthermore, during underwater use, the wire 3 may experience slight displacement due to water flow disturbance, mechanical vibration, or temperature changes, resulting in a local decrease in the sealing pressure of the second elastic sealing block 42. At this time, the sealant applied to the joint serves as a static sealing layer, which can compensate for the inadequacy of dynamic sealing and prevent leakage paths caused by the shaking of the wire 3 or the aging and shrinkage of the second elastic sealing block 42, thus enhancing the stability of long-term use.

[0033] Optionally, the sealant applied to the joint between the clamping end cap 21 and the wire 3 is a silicone sealant. This sealant has excellent flexibility and adhesion, and can cure at room temperature to form an elastic sealing layer, effectively adapting to the slight displacement of the wire 3 caused by vibration or bending, and preventing moisture from seeping in along the gap between the outer sheath of the cable 3 and the clamping end cap 21.

[0034] Optionally, the sealant applied to the joint between the clamping end cap 21 and the wire 3 is a polyurethane sealant. After curing, the sealant has high elongation and good wear resistance, and can absorb the deformation caused by mechanical stress or temperature changes at the interface between the wire 3 and the clamping end cap 21. The resulting sealing layer is dense and resistant to hydrolysis.

[0035] Optionally, the sealant applied to the joint between the clamping end cap 21 and the wire 3 is a flexible epoxy sealant. While maintaining the high insulation and moisture and heat resistance of the epoxy material, the sealant introduces flexible segments through molecular structure modification to reduce brittleness, so that it can adapt to the small relative movements between the wire 3 and the clamping end cap 21.

[0036] like Figures 1 to 5 The servo motor body 1 shown includes a bottom cover 11 and a main housing 12. A third sealing ring is provided between the bottom cover 11 and the main housing 12, and sealant is applied at the connection between the bottom cover 11 and the main housing 12. Furthermore, the third sealing ring fills the gap between the bottom cover 11 and the main housing 12 through compression deformation, achieving a basic physical seal; while the sealant further fills the tiny pores between the bottom cover 11 and the main housing 12 and the irregular gaps caused by processing errors during assembly, forming a non-porous sealing layer. The dual protection works synergistically to completely block the path of moisture seeping in from the connection.

[0037] Furthermore, the sealant, after curing, also has adhesive properties, which can enhance the tightness of the connection between the bottom cover 11 and the main housing 12, effectively resisting the risk of loosening caused by long-term underwater vibration and water pressure impact. At the same time, the sealant has good water resistance and corrosion resistance, can withstand the erosion of complex underwater environments, and avoids sealing failure due to aging and wear of the joint surface, which is conducive to extending the sealing service life of the servo motor body 1.

[0038] Furthermore, the main housing 12 has a first protrusion 121 on the side near the bottom cover 11, and the bottom cover 11 has a corresponding first groove 111 on the side near the main housing 12 that engages with the first protrusion 121. The two achieve positioning and initial sealing through the engagement of the protrusion and the groove. The third sealing ring is sleeved on the outer wall of the first protrusion 121. When the bottom cover 11 and the main housing 12 are assembled, the third sealing ring is pressed between the outer wall of the first protrusion 121 and the inner wall of the first groove 111, thereby forming a reliable radial seal and effectively preventing moisture from seeping into the interior from the bottom of the servo motor along the mating gap.

[0039] Optionally, the sealant applied at the connection between the bottom cover 11 and the main housing 12 can be a variety of adhesives suitable for underwater environments, such as silicone sealants, which have excellent flexibility and weather resistance and can cure at room temperature to form an elastic sealing layer to adapt to minor deformations caused by temperature or pressure changes between the housings; anaerobic sealants can also be used, which are suitable for threads or tight mating surfaces of metal materials and form a dense, water-resistant sealing barrier after curing under anaerobic conditions; in addition, modified silane sealants can also be used, which have good adhesion to both metals and engineering plastics and produce no corrosive byproducts during the curing process, making them suitable for underwater servo structures with high requirements for long-term sealing reliability.

[0040] like Figures 1 to 5 The servo motor body 1 shown includes a top cover 13, a fourth sealing ring is provided between the top cover 13 and the main housing 12, and sealant is applied at the connection between the top cover 13 and the main housing 12. Furthermore, the fourth sealing ring fills the gap between the top cover 13 and the main housing 12 through compression deformation, achieving a basic physical seal; while the sealant further fills the tiny pores between the top cover 13 and the main housing 12 and the irregular gaps caused by processing errors during assembly, forming a non-porous sealing layer. The dual protection works synergistically to completely block the path of moisture seeping in from the connection.

[0041] Furthermore, the sealant, after curing, also has adhesive properties, which can enhance the tightness of the connection between the top cover 13 and the main housing 12, effectively resisting the risk of loosening caused by long-term underwater vibration and water pressure impact. At the same time, the sealant has good water resistance and corrosion resistance, can withstand the erosion of complex underwater environments, and avoids sealing failure due to aging and wear of the joint surface, which is conducive to extending the sealing service life of the servo motor body 1.

[0042] Furthermore, the main housing 12 is provided with a second protrusion 122 on the side near the top cover 13, and the top cover 13 is provided with a second groove 131 on the side near the main housing 12, which is inserted and matched with the second protrusion 122. The two achieve positioning and initial sealing through the engagement of the protrusion and the groove. The fourth sealing ring is sleeved on the outer wall of the second protrusion 122. When the top cover 13 and the main housing 12 are assembled, the fourth sealing ring is pressed between the outer wall of the second protrusion 122 and the inner wall of the second groove 131, thereby forming a reliable radial seal and effectively preventing moisture from seeping into the interior from the top of the servo along the mating gap.

[0043] Optionally, the sealant applied at the connection between the top cover 13 and the main housing 12 can be a variety of adhesives suitable for underwater environments, such as silicone sealants, which have excellent flexibility and weather resistance and can cure at room temperature to form an elastic sealing layer to adapt to minor deformations caused by temperature or pressure changes between the housings; anaerobic sealants can also be used, which are suitable for threads or tight mating surfaces of metal materials and form a dense, water-resistant sealing barrier after curing under anaerobic conditions; in addition, modified silane sealants can also be used, which have good adhesion to both metals and engineering plastics and produce no corrosive byproducts during the curing process, making them suitable for underwater servo structures with high requirements for long-term sealing reliability.

[0044] like Figures 1 to 5 The bottom cover 11 and the main housing 12 shown are arranged in a vertical direction, and the waterproof connector 1 is arranged on the side of the bottom cover 11 away from the main housing 12 and extends in a vertical direction; Furthermore, the waterproof connector 2 is placed at the bottom of the servo motor and extends vertically, which facilitates the introduction of the cable 3 from bottom to top. This is suitable for underwater robot joints or submersible structures with bottom wiring, which helps to reduce the risk of disturbance and entanglement of the external cable 3 in the water flow, while avoiding excessive bending of the cable 3, which helps to improve the neatness and reliability of the wiring.

[0045] Furthermore, the bottom cover 11 is vertically assembled with the main shell 12, and the waterproof joint 3 extends vertically, so that the overall structure is compact and regular, which helps to save installation space and adapt to the limited layout space inside the underwater vehicle; secondly, the vertical assembly facilitates positioning and alignment, which helps to reduce installation difficulty and effectively improve assembly efficiency.

[0046] like Figures 1 to 5 The waterproof connector 2 shown is disposed on the periphery of the main housing 12 and extends in the horizontal direction; Furthermore, the waterproof connector 2 extends horizontally around the main housing 12, which helps to avoid occupying the installation space at the top and bottom of the servo motor body 1, and helps to adapt to the compact layout requirements of multiple components inside the underwater vehicle, and facilitates coordinated arrangement with other equipment or pipelines.

[0047] Furthermore, the waterproof connector 2 is horizontally placed on the outer side of the main housing 12, and the cable 3 is led out in the horizontal direction, which can be arranged to be close to the wall or flat against the frame, so as to avoid hanging down and getting hooked on the seabed, reefs, robotic arms, etc.

[0048] like Figures 1 to 5 The servo motor body 1 shown includes a servo motor 14 and a power output shaft 15. The power output shaft 15 is connected to the output shaft of the servo motor 14. The main housing 12 is provided with a mounting groove 16 for mounting the output shaft of the servo motor 14 and the power output shaft 15 on the side near the top cover 13. The power output shaft 15 is provided with a first retaining ring, a second retaining ring, and a plurality of fifth sealing rings located between the first retaining ring and the second retaining ring. The connection between the mounting groove 16, the output shaft of the servo motor 14, and the power output shaft 15 is sealed with an oil seal. Furthermore, several fifth sealing rings on the power output shaft 15 are limited by the first and second retaining rings, forming multiple elastic seals in the circumference of the shaft body. This helps to prevent water from seeping in along the shaft body gap. Combined with the oil seal at the connection between the mounting groove 16 and the two shafts, it forms a double protection of "multiple ring seals on the shaft body and oil seals on the mating surface", which helps to prevent underwater water from entering the motor and the inside of the housing.

[0049] Furthermore, the first and second retaining rings axially limit the movement of several fifth sealing rings, preventing them from shifting, twisting, or being squeezed out during assembly or operation, which helps ensure that the several fifth sealing rings are always in an effective compressed state. Secondly, the mounting groove 16 provides a precise reference for the connection between the power output shaft 15 and the output shaft of the servo motor 14, which helps reduce wear on the oil seal lip caused by eccentricity or runout, and effectively extends the seal life.

[0050] Specifically, there are three fifth sealing rings. Furthermore, the power output shaft 15 is provided with a first retaining ring, a second retaining ring, and three fifth sealing rings that are spaced apart along the axial direction of the power output shaft 15 between the first and second retaining rings. The first and second retaining rings axially limit the three fifth sealing rings to prevent them from shifting during shaft rotation. The three fifth sealing rings work together to form multiple elastic sealing barriers around the power output shaft 15, further improving the sealing reliability between the shaft and the mounting groove 16 and effectively blocking moisture from seeping in along the shaft gap.

[0051] Optionally, the oil seal used at the connection between the mounting slot 16, the output shaft of the servo motor 14, and the power output shaft 15 can be made of a water-resistant and corrosion-resistant material suitable for underwater operation, such as an oil seal made of nitrile rubber. It has good elasticity and water resistance, can fit tightly against the shaft and the inner wall of the mounting slot 16, resist underwater environmental erosion, and adapt to shaft rotation friction. Alternatively, an oil seal made of fluororubber can be used, which has more outstanding high and low temperature resistance and corrosion resistance, can withstand complex salinity and water pressure environments, and is not prone to aging and failure after long-term use. Alternatively, an oil seal made of polyurethane can be used, which has excellent wear resistance, can be adapted to high-frequency shaft rotation scenarios, and also has good sealing performance and water resistance, which helps to ensure stable sealing effect during power transmission.

[0052] Specifically, a multi-stage gear structure 17 for transmitting power is provided between the output shaft of the servo motor 14 and the power output shaft 15. The output torque of the servo motor 14 is reduced and increased through the multi-stage gear structure 17 and transmitted to the power output shaft 15, thereby reducing the speed and amplifying the torque. Finally, the power output shaft 15 drives the externally connected control surface or actuator to move.

[0053] like Figures 1 to 5 A connecting screw is provided between the bottom cover 11 and the main housing 12 shown. The connecting screw passes through the bottom cover 11 and is threaded to the main housing 12. A sixth sealing ring is fitted on the connecting screw, and sealant is applied to the mating surface between the connecting screw and the bottom cover 11. Furthermore, the sixth sealing ring is fitted onto the connecting screw, and fills the assembly gap between the connecting screw and the bottom cover 11 by compression deformation, thereby achieving a physical seal; the sealant applied to the mating surface fills the thread gap and the tiny pores at the fitting point, thereby forming a chemical seal, and the double protection completely prevents moisture from seeping into the housing from the screw mounting hole.

[0054] Furthermore, the sealant, after curing, also acts as an adhesive, which helps to enhance the tightness of the connection between the connecting screws and the bottom cover 11 and the main housing 12. Combined with the tightening force of the threaded connection, it helps to resist the loosening of the screws caused by long-term underwater vibration and water pressure impact, and effectively avoids the sealing gap caused by loose connection.

[0055] Optionally, the sealant applied to the mating surfaces of the connecting screw and the bottom cover 11 can be an adhesive suitable for sealing metal fasteners, such as an anaerobic sealant, which cures in an oxygen-free environment during thread engagement to form a dense sealing layer, effectively preventing moisture from seeping in along the screw hole; silicone sealants can also be used, which have good elasticity and adhesion, forming a flexible seal between the screw head and the end face of the bottom cover 11, adapting to vibration and thermal expansion and contraction; in addition, modified silane sealants can also be used, which have both excellent water resistance and adhesion to metal substrates, making them suitable for underwater environments with high requirements for long-term sealing reliability.

[0056] like Figures 1 to 5 The surface of the circuit board inside the servo motor body 1 shown is covered with a sealant layer; Furthermore, the sealant layer covering the circuit board surface can effectively isolate moisture, salt spray and condensation from corroding electronic components and solder joints, prevent short circuits, leakage or metal oxidation caused by humidity, and help enhance the long-term working stability of the circuit in underwater high humidity environments.

[0057] Furthermore, even if the servo housing experiences minor water leakage due to aging of the seals, loose connections, or accidental damage, the sealant layer on the internal circuit board can still serve as a second line of defense, preventing moisture from directly contacting sensitive electronic components. This facilitates a dual protection mechanism of "external sealing and internal protection," which helps improve the overall reliability of the servo body 1.

[0058] Optionally, the sealant layer covering the circuit board surface inside the servo motor body 1 can be made of various insulating and sealing materials suitable for the protection of electronic devices, such as silicone sealants, which have excellent flexibility, resistance to high and low temperatures and electrical insulation properties, and can remain stable in long-term immersion environments, effectively protecting solder joints and components; polyurethane sealants can also be used, which have strong adhesion and good resistance to damp heat, and form a dense elastic film after curing, suitable for underwater working conditions that need to withstand vibration or temperature cycling; in addition, modified epoxy sealants can also be used, which can reduce internal stress while providing high insulation and chemical corrosion resistance, which helps to avoid damage to precision electronic components.

[0059] The implementation method of Example 1 is as follows: An underwater servo motor with a sealed structure includes a servo motor body 1 and a waterproof connector 2 for introducing a wire 3. The waterproof connector 2 is connected to the servo motor body 1, and the wire 3 passes through the waterproof connector 2 and is electrically connected to a circuit board inside the servo motor body 1. A first sealing ring 41 is provided at the connection between the servo motor body 1 and the waterproof connector 2, and sealant is applied to the mating surface at the connection to form a composite sealing structure.

[0060] This invention creates a composite sealing structure combining mechanical and chemical processes by setting a first sealing ring and applying sealant at the connection between the servo motor body and the waterproof connector. This helps to seal the gap between the servo motor body and the waterproof connector, improves the waterproof reliability of the connection, and prevents water from seeping into the servo motor body. It effectively solves the problem that the sealing structure between the cable connector and the wire hole in existing underwater servos is often too simple, resulting in a small gap at the connection between the servo motor housing and the wire. Under long-term use or complex water pressure environments, this gap can easily lead to water ingress and damage to the circuit board.

[0061] The implementation method of Example 2 is as follows: Based on Example 1, Example 2 also has the following implementation method: The waterproof connector 2 includes a clamping end cap 21 and a connector base 22. The connector base 22 is connected to the servo motor body 1, the clamping end cap 21 is connected to the connector base 22, and the connection between the clamping end cap 21 and the connector base 22 is coated with sealant.

[0062] The implementation method of Example 3 is as follows: Based on Example 2, Example 3 also has the following implementation method: A second elastic sealing block 42 is provided between the clamping end cap 21 and the connector base 22. When the clamping end cap 21 is connected to the connector base 22, the second elastic sealing block 42 is squeezed and undergoes elastic deformation to seal the gap between the wire 3 and the interior of the waterproof connector 2. The joint between the clamping end cap 21 and the wire 3 is coated with sealant.

[0063] The implementation method of Example 4 is as follows: Based on Example 1, Example 4 also has the following implementation method: The servo motor body 1 includes a bottom cover 11 and a main housing 12. A third sealing ring is provided between the bottom cover 11 and the main housing 12, and sealant is applied at the connection between the bottom cover 11 and the main housing 12.

[0064] The implementation method of Example 5 is as follows: Based on Example 4, Example 5 also has the following implementation method: The servo motor body 1 includes a top cover 13, a fourth sealing ring is provided between the top cover 13 and the main housing 12, and a sealant is applied at the connection between the top cover 13 and the main housing 12.

[0065] The implementation method of Example 6 is as follows: Based on Example 5, Example 6 also has the following implementation method: the bottom cover 11 and the main housing 12 are arranged in a vertical direction, and the waterproof connector 1 is arranged on the side of the bottom cover 11 away from the main housing 12 and extends in a vertical direction.

[0066] The implementation method of Example 7 is as follows: Based on Example 5, Example 7 also has the following implementation method: the waterproof connector 2 is disposed on the periphery of the main housing 12 and extends in the horizontal direction.

[0067] The implementation method of Example 8 is as follows: Based on Embodiment 5, Embodiment 8 further includes the following implementation: The servo motor body 1 includes a servo motor 14 and a power output shaft 15. The power output shaft 15 is connected to the output shaft of the servo motor 14. The main housing 12 is provided with a mounting groove 16 for mounting the output shaft of the servo motor 14 and the power output shaft 15 on the side near the top cover 13. The power output shaft 15 is provided with a first retaining ring, a second retaining ring, and several fifth sealing rings located between the first retaining ring and the second retaining ring. The connection between the mounting groove 16, the output shaft of the servo motor 14, and the power output shaft 15 is sealed with an oil seal.

[0068] The implementation method of Example 9 is as follows: Based on Example 4, Example 9 also has the following implementation method: a connecting screw is provided between the bottom cover 11 and the main housing 12. The connecting screw passes through the bottom cover 11 and is threaded to the main housing 12. A sixth sealing ring is fitted on the connecting screw, and sealant is applied to the mating surface between the connecting screw and the bottom cover 11.

[0069] The implementation method of Example 10 is as follows: Based on Example 1, Example 10 also has the following implementation method: the surface of the circuit board inside the servo motor body 1 is covered with a sealant layer.

[0070] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. An underwater servo motor with a sealed structure, comprising a servo motor body (1) and a waterproof connector (2) for introducing a wire (3), characterized in that: The waterproof connector (2) is connected to the servo motor body (1). The wire (3) passes through the waterproof connector (2) and is electrically connected to the circuit board inside the servo motor body (1). A first sealing ring (41) is provided at the connection between the servo motor body (1) and the waterproof connector (2), and sealant is applied to the mating surface at the connection to form a composite sealing structure.

2. The underwater servo motor with a sealed structure according to claim 1, characterized in that: The waterproof connector (2) includes a clamping end cap (21) and a connector base (22). The connector base (22) is connected to the servo motor body (1). The clamping end cap (21) is connected to the connector base (22). The connection between the clamping end cap (21) and the connector base (22) is coated with sealant.

3. The underwater servo motor with a sealed structure according to claim 2, characterized in that: A second elastic sealing block (42) is provided between the clamping end cap (21) and the connector base (22). When the clamping end cap (21) is connected to the connector base (22), the second elastic sealing block (42) is squeezed and undergoes elastic deformation to seal the gap between the wire (3) and the interior of the waterproof connector (2). The joint between the clamping end cap (21) and the wire (3) is coated with sealant.

4. The underwater servo motor with a sealed structure according to claim 1, characterized in that: The servo motor body (1) includes a bottom cover (11) and a main housing (12). A third sealing ring is provided between the bottom cover (11) and the main housing (12), and sealant is applied at the connection between the bottom cover (11) and the main housing (12).

5. An underwater servo motor with a sealed structure according to claim 4, characterized in that: The servo motor body (1) includes a top cover (13), a fourth sealing ring is provided between the top cover (13) and the main housing (12), and sealant is applied at the connection between the top cover (13) and the main housing (12).

6. An underwater servo motor with a sealed structure according to claim 5, characterized in that: The bottom cover (11) and the main housing (12) are arranged in a vertical direction, and the waterproof connector (2) is arranged on the side of the bottom cover (11) away from the main housing (12) and extends in a vertical direction.

7. An underwater servo motor with a sealed structure according to claim 5, characterized in that: The waterproof connector (2) is disposed on the periphery of the main housing (12) and extends in the horizontal direction.

8. An underwater servo motor with a sealed structure according to claim 5, characterized in that: The servo motor body (1) includes a servo motor (14) and a power output shaft (15). The power output shaft (15) is connected to the output shaft of the servo motor (14). The main housing (12) is provided with a mounting groove (16) for mounting the output shaft of the servo motor (14) and the power output shaft (15) on the side near the top cover (13). The power output shaft (15) is provided with a first retaining ring, a second retaining ring, and several fifth sealing rings located between the first retaining ring and the second retaining ring. The connection between the mounting groove (16), the output shaft of the servo motor (14), and the power output shaft (15) is sealed with an oil seal.

9. An underwater servo motor with a sealed structure according to claim 4, characterized in that: A connecting screw is provided between the bottom cover (11) and the main housing (12). The connecting screw passes through the bottom cover (11) and is threaded to the main housing (12). A sixth sealing ring is fitted on the connecting screw, and sealant is applied to the mating surface between the connecting screw and the bottom cover (11).

10. An underwater servo motor with a sealed structure according to claim 1, characterized in that: The surface of the circuit board inside the servo motor body (1) is covered with a sealant layer.

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