Underwater releasing device based on lead screw structure

Abstract

An underwater releasing device based on a lead screw structure comprises a base, a releasing mechanism and a binding band, the releasing mechanism comprises a driving unit, a releasing unit, an unlocking hook and a rotating rod, and when a limiting piece axially moves and breaks away from contact with the first end of the rotating rod, the rotating rod swings and makes the second end of the rotating rod break away from contact with the unlocking hook; the unlocking hook swings and opens the opening of the locking groove, and the connecting ring is separated from the locking groove so that the binding band can be loosened and the released piece can be released. According to the embodiment of the utility model, the connecting ring is separated from the locking groove to unlock the bandage, so that the released part is released and is completely separated from the released part after being released, the weight of the released part is not increased, unnecessary weight burden is not increased, the streamline of the surface of the released part can be kept, and the service life of the released part is prolonged. The underwater movement resistance of the released part is prevented from being increased, fixing is carried out only through the binding band, locking and fixing are achieved through the lead screw assembly and the unlocking assembly of a mechanical structure, the structure is simple, dismounting and mounting are easy, and the reliability is high after long-time use.

Description

Technical Field

[0001] The utility model belongs to the technical field of ocean detection, and in particular relates to an underwater releasing device based on a screw structure. Background Art

[0002] When deploying underwater observation and detection equipment, a reliable underwater release mechanism is crucial for achieving covert observation and efficient deployment. Currently, common underwater observation and detection equipment includes buoys and underwater gliders. These devices are typically deployed underwater from a carrier platform to ensure they can complete their observation and detection missions while remaining concealed. Therefore, the release mechanism must not only provide adequate preload to prevent the equipment from shifting or falling while the carrier platform is in motion, but also quickly release the restraint upon reaching the deployment location to ensure rapid deployment.

[0003] In the prior art, since most underwater observation and detection equipment uses a cylindrical rotating body structure, it is usually fixed with a rigid clamp, and the restraint is released by means of explosive bolts or hydraulic cylinders. For example, in the patent application "An Underwater Carrying Release Device" with the number 202211431876.2, a solution is proposed to use an annular clamp to fix the released part. In this solution, the annular clamp is tightly connected to the underwater observation and detection equipment. The clamp is fixed to the main body of the release device through multiple hooks. The hooks cooperate with the toothed structure on the annular clamp to limit the movement of the equipment underwater. When the equipment needs to be released, the hydraulic cylinder drives the hook to rotate around the pin, releasing the restraint of the connecting part and releasing the equipment into the water together with the clamp.

[0004] However, this design has the following problems in practical application:

[0005] 1. Weight Increase: Because the ring hoop is an integral part of the released equipment, it enters the water along with the equipment after release. This adds unnecessary weight to equipment that requires precise buoyancy control, such as buoys and underwater gliders. This affects the equipment's buoyancy regulation, potentially leading to buoyancy imbalance or increased energy consumption, and increases resistance during underwater travel.

[0006] 2. Structural complexity: This solution uses four rotating hooks to secure the annular clamp. While this design improves the clamp's fixing strength, it complicates the overall structure of the device and increases the difficulty of installation and disassembly. The multi-component combination and precision requirements of the equipment not only increase the complexity of installation but may also lead to reliability issues in long-term use, such as wear of the hooks and failure of the hydraulic cylinder, which reduces the stability of the device. Utility Model Content

[0007] In response to the shortcomings in the relevant technologies, the utility model provides an underwater release device based on a screw structure to solve the problems of increased weight and complex structure in the current release method of underwater observation and detection equipment.

[0008] The utility model provides an underwater releasing device based on a screw structure, which is used for fixing and releasing a released part, and includes:

[0009] base,

[0010] a release mechanism, mounted on the base;

[0011] A strap, one end of which is fixed to the base and the other end is fixed to the release mechanism, the strap tightly embraces the released part and presses and fixes it to the base;

[0012] Release mechanisms include:

[0013] A drive unit having a motor and a screw assembly, wherein the motor drives the screw rod of the screw assembly so that the screw nut drives the limit member connected thereto to move axially;

[0014] The release unit has a release seat and an unlocking assembly mounted on the release seat. The release seat has a locking groove. The limiter blocks the unlocking assembly so that the unlocking assembly can limit and fix the connecting ring provided at the end of the strap in the locking groove. The unlocking assembly includes:

[0015] an unlocking hook, a first end of which is hinged to a release seat on one side of the locking slot, and a second end of which spans the locking slot and extends to the other side thereof to close an opening of the locking slot;

[0016] The rotating rod has its middle portion hinged on the release seat, the first end of the rotating rod abuts against the limit piece, the limit piece blocks the rotating rod, the second end of the rotating rod abuts against the second end of the unlocking hook and blocks the unlocking hook. When the limit piece moves axially and disengages from the contact with the first end of the rotating rod, the rotating rod swings and disengages its second end from the unlocking hook. The unlocking hook swings and opens the opening of the locking groove, and the connecting ring disengages from the locking groove to loosen the strap and release the released part.

[0017] In some embodiments, a locking member is connected to one end of the strap away from the connecting ring. The locking member is threadedly connected to a threaded hole provided in the base. The locking member is screwed into the threaded hole to tighten the strap.

[0018] In some embodiments, a support seat is provided on the base, and the support seat has a support groove. The strap embraces the released part and presses and fixes it in the support groove.

[0019] In some embodiments, two support seats are provided, and the strap is located between the two support seats.

[0020] In some embodiments, the motor drives the limiting member to move forward and backward, the unlocking hook is located on the front side of the limiting member, the opening of the locking slot faces the front side, and the rotating rod abuts against the side wall of the limiting member.

[0021] In some of these embodiments, the drive unit further includes a cabin;

[0022] The motor is installed in the cabin, one end of the lead screw is connected to the output shaft of the motor through a coupling, and the other end is threadedly connected to the lead screw nut. A transmission rod is provided on the end surface of the lead screw nut away from the motor. The transmission rod extends through a transmission hole provided in the cabin and is coaxially fixedly connected to the limiter.

[0023] When the unlocking assembly limits and fixes the connecting ring in the locking groove, the end surface of the lead screw nut is attached to the inner wall of the cabin to close the transmission hole.

[0024] In some embodiments, a linear bearing is installed in the cabin, and the lead screw nut is fixedly connected to the linear bearing.

[0025] In some embodiments, the lead screw is threadedly connected to the threaded hole of the lead screw nut, and the lead screw ring is provided with a limiting flange. When the limiting flange abuts against the end face of the lead screw nut close to the motor, the end of the transmission rod away from the lead screw nut is located outside the cabin.

[0026] In some embodiments, the linear bearing is slidably mounted on a guide rod fixedly mounted in the cabin, a mounting seat is fixedly mounted on the guide rod, the lead screw passes through the mounting seat and is sleeved with a thrust bearing, and a limiting nut installed on the lead screw presses the thrust bearing on the mounting seat.

[0027] In some embodiments, the screw assembly is parallel to the length direction of the released member.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows: in the embodiment of the utility model, the released part is fixed by the straps limited by the release mechanism; the motor drives the limiting part through the screw assembly to realize the release of the unlocking assembly, so that the connecting ring disengages the locking groove and unlocks the straps, thereby realizing the release of the released part. After the released part is released, the straps originally fixed to it are connected to the base and are completely separated from the released part, which will not cause an increase in the weight of the released part, so that it can accurately control its buoyancy and will not add unnecessary weight burden. It can also keep the surface streamline of the released part, avoid increasing the resistance of the released part to moving underwater, and is only fixed by the straps, and locked and fixed by the screw assembly and unlocking assembly of the mechanical structure. It has a simple structure, is easy to disassemble and install, and has high reliability for long-term use, solving the problems of increased weight and complex structure in the current release method of underwater observation and detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of the underwater release device based on the screw structure of the utility model Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the structure of the underwater release device based on the screw structure of the utility model Figure 2 ;

[0032] Figure 3 This is a cross-sectional structural diagram of the release mechanism in the underwater release device based on the screw structure of the present invention.

[0033] In the picture:

[0034] 1. Base; 11. Support base; 12. Support groove;

[0035] 2. Release mechanism; 21. Drive unit; 211. Motor; 212. Lead screw; 213. Lead screw nut; 214. Stopper; 215. Cabin; 216. Transmission rod; 217. Transmission hole; 218. Stopper flange; 219. Guide rod; 210. Mounting seat; 22. Release unit; 221. Release seat; 222. Locking slot; 223. Unlocking hook; 224. Rotating rod;

[0036] 3. Binding strap; 31. Connecting ring; 32. Locking piece;

[0037] 4. Released part; 5. Coupling; 6. Linear bearing; 7. Thrust bearing; 8. Limit nut. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] The terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of such features.

[0041] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0042] like Figures 1 to 3 As shown, in an illustrative embodiment of the underwater releasing device based on a screw structure of the present invention, the underwater releasing device based on a screw structure includes a base 1, a releasing mechanism 2 and a strap 3.

[0043] The release mechanism 2 is installed on the base 1, one end of the strap 3 is fixed to the base 1, and the other end is fixed to the release mechanism 2. In the process of extending the strap 3 from one end to the other end, it passes around the released part 4 and holds the released part 4 tightly, so that it is pressed and fixed on the base 1.

[0044] The release mechanism 2 includes a drive unit 21 and a release unit 22. The drive unit 21 comprises a motor 211 and a screw assembly, which includes a lead screw 212 and a lead screw nut 213 threadedly connected thereto. The motor 211 is connected to the lead screw 212, and when it is driven to rotate, the lead screw nut 213 moves axially. A stopper 214 is mounted on the lead screw nut 213, allowing it to move axially with the motor. The release unit 22 includes a release seat 221 and an unlocking assembly installed on the release seat 221. The release seat 221 has a locking groove 222. A connecting ring 31 is provided at the end of the strap 3. One side of the connecting ring 31 is located in the locking groove 222. Even if one side of the locking groove 222 partially passes through the connecting ring 31, the limiting member 214 blocks the unlocking assembly so that it cannot move, thereby limiting and fixing the unlocking assembly to close the opening of the locking groove 222, and limiting and fixing one side of the connecting ring 31 in the locking groove 222, so that the release unit 22 limits and fixes the strap 3, so that the strap 3 hugs the released part 4 and presses it to be fixed on the base 1.

[0045] More specifically, the unlocking assembly includes an unlocking hook 223 and a rotating rod 224, the two ends of the unlocking hook 223 are respectively a first end and a second end, the first end of the unlocking hook 223 is hinged on the release seat 221 on one side of the locking groove 222, so that the unlocking hook 223 can swing; the second end of the unlocking hook 223 locks the groove 222 and extends to the other side thereof, thereby closing the opening of the locking groove 222. The rotating rod 224 has a first end and a second end, respectively. The middle portion of the rotating rod 224 is hinged, allowing it to rotate and swing. The first end of the rotating rod 224 abuts against the limiter 214, which blocks the first end of the rotating rod 224 from swinging in the first direction. The second end of the rotating rod 224 abuts against the second end of the unlocking hook 223, which blocks the second end of the rotating rod 224 from swinging in the second direction. At the same time, the second end of the rotating rod 224 blocks the unlocking hook 223 from swinging away from the locking groove 222, thereby keeping the opening of the locking groove 222 closed and securing the connecting ring 31 in the locking groove 222, so that the strap 3 tightly embraces the released member 4 and presses it against the base 1. The first direction is opposite to the second direction, that is, when the first direction is clockwise or counterclockwise, the second direction is counterclockwise or clockwise.

[0046] When releasing the released member 4, the motor 211 of the drive unit 21 drives the lead screw 212 to rotate, causing the limiter 214 to move axially along with the lead screw nut 213 and disengage from the rotating rod 224. The first end of the rotating rod 224 loses the swing restriction imposed by the limiter and swings in the first direction. The second end of the rotating rod 224 then disengages from the unlocking hook 223, eliminating the restriction on the unlocking hook 223. The weight of the released member 4 pulls on the strap 3, causing the connecting ring 31 to pull the unlocking hook 223, causing it to swing away from the locking groove 222. This opens the locking groove 222 and allows the connecting ring 31 to disengage, thereby eliminating the positional restriction on that end of the strap 3. The strap 3 then releases the released member 4, allowing the released member 4 to be released. To ensure that the connecting ring 31 can smoothly push the unlocking hook 223 away and disengage from the locking groove 222 during release, the inner wall of the locking groove 222 is arc-shaped, with a circular transition at the edge.

[0047] In the above-mentioned schematic embodiment, the underwater release device based on the screw structure fixes the released part 4 through the strap 3 that is limited and fixed by the released mechanism 2; the motor 211 drives the limiting part 214 through the screw assembly to realize the release of the unlocking assembly, so that the connecting ring 31 disengages from the locking groove 222 to unlock the strap 3, thereby realizing the release of the released part 4. After the released part 4 is released, the strap 3 originally fixed to it is connected to the base 1 and is completely separated from the released part 4, without causing an increase in the weight of the released part 4, so that it can accurately control its buoyancy and does not add unnecessary weight burden. It can also maintain the streamlined appearance of the released part 4, avoid increasing the resistance of the released part 4 to move underwater, and is only fixed by the strap 3, and is locked and fixed by the screw assembly and unlocking assembly of the mechanical structure. It has a simple structure, is easy to disassemble and install, and has high reliability for long-term use, solving the problems of increased weight and complex structure in the current release method of underwater observation and detection equipment. In addition, the screw assembly has a self-locking capability and can remain fixed when the motor 211 stops, thereby maintaining the stability of the limiter 214, stably and continuously limiting the unlocking assembly, and the unlocking assembly stably closes the locking groove 222, keeping one end of the strap 3 stably fixed.

[0048] In some embodiments, a locking member 32 is connected to one end of the strap 3 away from the connecting ring 31 , and the locking member 32 is threadedly connected to a threaded hole provided in the base 1 , thereby achieving a fixed connection between the strap 3 and the base 1 .

[0049] Since the binding strap 3 is elastic, it is prone to aging after prolonged use and may be stretched under the weight of the released part 4. At this time, even if the connecting ring 31 at the other end of the binding strap 3 is fixed in the locking groove 222 of the release seat 221, it is no longer possible to ensure that the binding strap 3 holds the released part 4 tightly, causing the released part 4 to accidentally loosen and fall. To avoid this problem, when the binding strap 3 ages and stretches, the knob locking member 32 is rotated to screw it deeper into the threaded hole, so that the end of the binding strap 3 is closer to the base 1 or extends into the threaded hole in the base 1, thereby tightening the binding strap 3 at this end, ensuring that the binding strap 3 can hold the released part 4 tightly even after prolonged use, firmly pressing and fixing it to the base 1 to prevent it from loosening and falling.

[0050] Since the released part 4 is generally long and the strap 3 is a flexible part, if the released part 4 is only fixed by tying the middle part of the strap 3, the released part 4 is likely to swing left and right, resulting in increased resistance when the underwater navigation equipment carries it underwater, and the released part 4 is also likely to fall off under the push of the water flow.

[0051] In some embodiments, in order to improve the stability of the released part 4 when it is fixed, a support seat 11 is provided on the base 1. The support seat 11 has a support groove 12. The strap 3 hugs the released part 4 and presses it to be fixed in the support groove 12.

[0052] The support groove 12 of the support seat 11 forms a limit for the released part 4 in the left and right directions, and the strap 3 limits and fixes the released part 4, so that the released part 4 is supported by at least two points in the left and right directions, thereby improving the stability of the released part 4 when it is fixed and preventing it from swinging left and right.

[0053] In some embodiments, two support bases 11 are provided, and the strap 3 is located between the two support bases 11. The two support bases 11 respectively limit the left and right positions of the released member 4 at two points, while the strap 3 mainly limits and fixes the released member 4 in the vertical direction, further improving the stability of the released member 4 when it is fixed.

[0054] In some embodiments, the motor 211 drives the limit member 214 to move forward and backward, the unlocking hook 223 is located on the front side of the limit member 214 , the opening of the locking slot 222 faces the front side, and the rotating rod 224 abuts against the side wall of the limit member 214 .

[0055] The rotating rod 224 is located on the same side of the unlocking hook 223 and the retaining member 214, making the unlocking assembly simple and compact. The two ends of the rotating rod 224 are blocked and restrained by both, preventing them from swinging in either direction. This allows the unlocking hook 223 to stably close the locking groove 222, securing the connecting ring 31 therein. To improve the compactness of the structure and prevent the rotating rod 224 from protruding, the second end of the rotating rod 224 is located in a mounting groove provided at the second end of the unlocking hook 223. After the unlocking hook 223 and the rotating rod 224 abut, the outer surface is smooth.

[0056] In some embodiments, the drive unit 21 further includes a cabin 215. The motor 211 is installed in the cabin 215. One end of the lead screw 212 is connected to the output shaft of the motor 211 via a coupling 5, and the other end is threadedly connected to the lead screw nut 213. A transmission rod 216 is provided on the end surface of the lead screw nut 213 away from the motor 211. The transmission rod 216 extends through a transmission hole 217 provided in the cabin 215 and is coaxially fixedly connected to the limit member 214.

[0057] The motor 211 is installed in the sealed cabin 215. The sealing performance of the cabin 215 is used to ensure that the motor 211 is in a dry environment, so that the motor 211 does not need to be a waterproof motor and can maintain stable operation, thereby reducing equipment costs.

[0058] When the unlocking assembly limits and fixes the connecting ring 31 in the locking groove 222, the limiting member 214 extends to the maximum extent to block the transmission rod 216 of the unlocking assembly, and the end face of the screw nut 213 is attached to the inner wall of the cabin 215, thereby closing the transmission hole 217 and improving the sealing performance of the cabin 215.

[0059] In some embodiments, a linear bearing 6 is mounted within the housing 215, and the lead screw nut 213 is fixedly connected to the linear bearing 6. The housing 215 guides the axial movement of the lead screw nut 213 through the linear bearing 6 and limits the position of the lead screw nut 213 in the circumferential direction, thereby preventing the lead screw nut 213 from rotating synchronously with the lead screw 212 and ensuring that the rotation of the lead screw 212 generates the axial movement of the lead screw nut 213.

[0060] In some embodiments, the lead screw 212 is threadedly connected to the threaded hole of the lead screw nut 213 and is provided with a limiting flange 218. When the limiting flange 218 abuts the end surface of the lead screw nut 213 near the motor 211, the end of the transmission rod 216 away from the lead screw nut 213 is located outside the housing 215. The limiting flange 218 limits the inward axial movement of the lead screw nut 213, preventing excessive movement of the lead screw 212, which could cause the transmission rod 216 to retract into the housing 215 and cause water leakage in the transmission hole 217.

[0061] In some embodiments, the linear bearing 6 is slidably mounted on a guide rod 219 fixedly mounted in the cabin 215, a mounting seat 210 is fixedly mounted on the guide rod 219, a lead screw 212 passes through the mounting seat 210, and is sleeved with a thrust bearing 7, and a limiting nut 8 installed on the lead screw 212 presses the thrust bearing 7 on the mounting seat 210.

[0062] The guide rod 219 not only facilitates the installation of the linear bearing 6 but also provides support for the mounting base 210, enabling the mounting base 210 to provide radial support for the lead screw 212, ensuring its stable rotation. The thrust bearing 7 ensures smooth screw rotation, and the limiting nut 8 mounted on its inner end allows for the limited installation of the thrust bearing 7, simplifying the fixing structure, improving the compactness of the assembly, and reducing the weight of the equipment.

[0063] In order to improve the stability of the mounting seat 210, two guide rods 219 can be set on the left and right. Both guide rods 219 are installed with linear bearings 6 fixedly connected to the limiting nut 8, thereby improving the limiting effect on the limiting nut 8 in the circumferential direction and improving the stability of the axial movement of the limiting nut 8.

[0064] In some embodiments, as Figure 1 As shown, the screw assembly is parallel to the length direction of the released part 4, so that the release mechanism 2 is in a state parallel to the released part 4, so that when carrying the released part 4 underwater, the cross-sectional area of ​​the release mechanism 2 facing the navigation direction is reduced, the reverse impact of the water flow is reduced, and the navigation resistance is reduced.

[0065] In addition, during navigation, the above-mentioned setting method makes it easy for water to flow directly toward the transmission hole 217 on the front side. The end face of the screw nut 213 can be tightly attached to the inner wall of the cabin 215 to seal the transmission hole 217, thereby improving the sealing performance and preventing water from flowing directly into the cabin 215 and causing water seepage inside the cabin 215.

[0066] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for which protection is requested in the present invention.

Claims

1. An underwater release device based on a screw structure, used for fixing and releasing a released part, characterized in that: include: base, a release mechanism, mounted on the base; A strap, one end of which is fixed to the base and the other end is fixed to the release mechanism, the strap tightly embraces the released member and presses and fixes it to the base; The release mechanism comprises: A drive unit having a motor and a screw assembly, wherein the motor drives the screw of the screw assembly to cause the screw nut to drive the limiter connected thereto to move axially; The release unit has a release seat and an unlocking assembly mounted on the release seat, the release seat has a locking groove, the limiter blocks the unlocking assembly so that the unlocking assembly can limit and fix the connecting ring provided at the end of the strap in the locking groove, and the unlocking assembly includes: an unlocking hook, a first end of which is hinged to the release seat on one side of the locking groove, and a second end of which spans the locking groove and extends to the other side thereof to close the opening of the locking groove; A rotating rod, the middle portion of which is hinged on the release seat, the first end of the rotating rod abuts against the limit member, the limit member blocks the rotating rod, the second end of the rotating rod abuts against the second end of the unlocking hook and blocks the unlocking hook, when the limit member moves axially and disengages from the contact with the first end of the rotating rod, the rotating rod swings and disengages its second end from the contact with the unlocking hook, the unlocking hook swings and opens the opening of the locking groove, and the connecting ring disengages from the locking groove to loosen the strap and release the released member.

2. The underwater release device based on the screw structure according to claim 1, characterized in that: One end of the binding strap away from the connecting ring is connected with a locking piece, and the locking piece is threadedly connected to a threaded hole provided in the base. The locking piece is screwed into the threaded hole to tighten the binding strap.

3. The underwater release device based on a screw structure according to claim 1, characterized in that: A support seat is provided on the base, and the support seat has a support groove. The binding belt hugs the released part and presses and fixes it in the support groove.

4. The underwater release device based on a screw structure according to claim 3, characterized in that: There are two support seats, and the strap is located between the two support seats.

5. The underwater release device based on a screw structure according to claim 1, characterized in that: The motor drives the limiting member to move forward and backward, the unlocking hook is located at the front side of the limiting member, the opening of the locking groove faces the front side, and the rotating rod abuts against the side wall of the limiting member.

6. The underwater release device based on a screw structure according to claim 1, characterized in that: The drive unit further includes a cabin; The motor is installed in the cabin, one end of the lead screw is connected to the output shaft of the motor through a coupling, and the other end is threadedly connected to the lead screw nut, and a transmission rod is provided on the end surface of the lead screw nut away from the motor, and the transmission rod extends through the transmission hole provided in the cabin and is coaxially fixedly connected to the limit member; When the unlocking assembly limits and fixes the connecting ring in the locking groove, the end surface of the lead screw nut is attached to the inner wall of the cabin to close the transmission hole.

7. The underwater release device based on a screw structure according to claim 6, characterized in that: A linear bearing is installed in the cabin, and the lead screw nut is fixedly connected to the linear bearing.

8. The underwater release device based on a screw structure according to claim 6, characterized in that: The lead screw is threadedly connected to the threaded hole of the lead screw nut. The lead screw ring is provided with a limiting flange. When the limiting flange abuts against the end face of the lead screw nut close to the motor, the end of the transmission rod away from the lead screw nut is located outside the cabin.

9. The underwater release device based on a screw structure according to claim 7, characterized in that: The linear bearing is slidably mounted on a guide rod fixedly mounted in the cabin, a mounting seat is fixedly mounted on the guide rod, the lead screw passes through the mounting seat and is sleeved with a thrust bearing, and a limiting nut mounted on the lead screw presses the thrust bearing on the mounting seat.

10. The underwater release device based on a screw structure according to claim 1, characterized in that: The screw assembly is parallel to the length direction of the released member.

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