Underwater vehicle ballast jettison mechanism
By employing a plug-in structure of moving rods and connecting rods in the underwater vehicle jettisoning device, combined with coil drive and battery power supply, the problems of large size and high cost of permanent magnets are solved, and a low-cost and low-power automatic jettisoning function is realized.
Patent Information
- Application Number
- CN202310915565.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-25
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2043-07-25
AI Technical Summary
Existing underwater ballast disposal devices suffer from large and expensive permanent magnets, and the motor drive components also have high costs.
It adopts a plug-in structure of moving rod and connecting rod, uses coil as driving component, and achieves low-power load dropping through control board and battery, eliminating the use of large permanent magnet.
It reduces the cost and size of the ejection mechanism, while achieving a low-power ejection effect and automatically ejecting the load when needed, thus saving energy.
Smart Images
Figure CN117002711B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of underwater vehicle technology, and more specifically to a jettisoning mechanism for underwater vehicles. Background Technology
[0002] To improve the safety of underwater vehicles, they are usually equipped with emergency jettisoning devices. When an emergency occurs, the jettisoning device is triggered to jettison the ballast, so that the underwater equipment is in a positive buoyancy state and can safely float to the surface to await recovery by surface vessels.
[0003] Currently, Chinese Patent Publication No. CN106697234A discloses a low-power underwater ballast disposal device. This device includes a motor, a watertight tank, a permanent magnet, an iron ballast block, a connecting flange, a ballast disposal mechanism cover plate, a watertight connector fixing component, and a pressure-resistant wet-plug connector male. The ballast disposal mechanism cover plate is fixedly and sealed to the watertight tank. The motor is installed inside the watertight tank, and its upper end is electrically connected to the terminal of the pressure-resistant wet-plug connector male. The connecting flange is fixed to the rotating shaft of the motor, and the permanent magnet is fixed to the lower side of the connecting flange. A circular slot is provided at the bottom of the watertight tank opposite to the permanent magnet, and a small portion of the iron ballast block is embedded in the circular slot. When the low-power underwater ballast disposal device is in use, when the motor rotates, it drives the permanent magnet to move along an arc through the connecting flange. After the permanent magnet shifts, the iron ballast block loses the attraction of the permanent magnet and falls under the action of gravity, thereby achieving ballast disposal.
[0004] However, in the aforementioned low-power underwater ballast disposal device, since it is necessary to rely on permanent magnets to directly attract the iron ballast block, a large permanent magnet is required, which results in high cost and a large overall size of the underwater ballast disposal device. Furthermore, the aforementioned low-power underwater ballast disposal device uses an electric motor as the driving component, which also results in high cost. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a jettison mechanism for underwater vehicles, which has the advantages of low power consumption and low cost.
[0006] The underwater vehicle jettisoning mechanism of the present invention includes a moving rod, a coil, a support sleeve, an annular permanent magnet, a clamping sleeve, a spring, a control plate, a battery, a counterweight, a connecting rod, and a cylinder with openings at both ends and internal cavities. A left end cap and a right end cap are respectively sealed and fixed to the left and right ends of the cylinder. An annular support plate is provided on the inner wall of the cylinder. The coil is embedded in the cylinder located to the left of the annular support plate, with the right end of the coil abutting against the left end of the annular support plate. The support sleeve is embedded in the cylinder located to the left of the coil, with the right end of the support sleeve abutting against the left end of the coil. An annular step is provided on the inner wall of the device. An annular permanent magnet is embedded in the annular step and abuts against the inner end of the annular step. The right end of the clamping sleeve is inserted into the annular step and abuts against the left end of the annular permanent magnet. The left end of the clamping sleeve abuts against the right end of the left end cover. The clamping sleeve, annular permanent magnet, support sleeve, and coil are pressed against the annular support plate by the left end cover. The control board and battery are fixed in the cylinder located on the right side of the annular support plate. A lead wire hole is provided on the side wall of the cylinder. The lead wire of the control board is electrically connected to the external power supply unit through the lead wire hole. The lead wire of the control board is connected to the lead wire hole. The coil and battery are electrically connected to the control board, and the coil is filled with sealant. A movable rod is movably inserted through the left end cover, clamping sleeve, annular permanent magnet, support sleeve, coil, annular support plate, control board, battery, and right end cover. A first sealing structure and a second sealing structure are respectively provided between the movable rod and the left and right end covers. A ferromagnetic ring with an outer diameter smaller than the inner diameter of the annular permanent magnet is fitted around the outside of the movable rod. A spring is fitted around the outside of the movable rod, with its left end abutting against the right end of the left end cover and its right end abutting against the left end of the ferromagnetic ring. The annular permanent magnet... The magnetic ring's attraction is greater than the spring force applied to the ferromagnetic ring. An annular boss is provided on the outer wall of the moving rod. When the moving rod moves to the right, the annular boss abuts against the left end of the right end cover. A left guide sleeve is fixed to the left end of the left end cover. The left end of the moving rod is movably inserted into the left guide sleeve. A slot is vertically provided in the left guide sleeve. The upper end of the connecting rod is inserted into the slot. An insertion hole is provided at the upper end of the connecting rod. The left end of the moving rod is inserted into the insertion hole. The lower end of the moving rod is connected to the counterweight. A right guide sleeve is fixed to the right end of the right end cover. The right end of the moving rod is movably inserted into the right guide sleeve.
[0007] This invention locks the counterweight by using the interlocking action of a moving rod and a connecting rod, thus eliminating the need for a large permanent magnet to attract the counterweight, thereby reducing the cost and size of the load-throwing mechanism. Furthermore, this invention uses a coil as the driving component, which has the advantage of low cost. In addition, this invention only connects the coil power supply when load throwing is required, thus having the advantage of low power consumption.
[0008] The underwater vehicle jettisoning mechanism of the present invention includes a first protrusion with an outer diameter smaller than that of the left end cover at the right end. The first protrusion is inserted into the left end of the cylinder. The outer peripheral wall of the first protrusion is in contact with the inner peripheral wall of the cylinder. A first annular groove is provided on the outer wall of the first protrusion. A first O-ring is embedded in the first annular groove. The first O-ring is tightly sealed to the first annular groove and the inner wall of the cylinder. With this structure, under the action of the first O-ring, the first O-ring can be tightly sealed to the first annular groove and the inner wall of the cylinder, thereby enabling the left end cover to be reliably sealed to the left end of the cylinder. The left end cover can be fixed to the left end of the cylinder by a number of bolts distributed circumferentially.
[0009] The underwater vehicle jettisoning mechanism of the present invention includes a second protrusion with an outer diameter smaller than that of the right end cover at its left end. The second protrusion is inserted into the right end of the cylinder, and the outer peripheral wall of the second protrusion is in contact with the inner peripheral wall of the cylinder. A second annular groove is provided on the outer wall of the second protrusion, and a second O-ring is embedded in the second annular groove. The second O-ring is tightly sealed to the second annular groove and the inner wall of the cylinder. With this structure, under the action of the second O-ring, the second O-ring can be tightly sealed to the second annular groove and the inner wall of the cylinder, thereby enabling the right end cover to be reliably sealed to the right end of the cylinder. The right end cover can be fixed to the right end of the cylinder by a plurality of bolts distributed circumferentially.
[0010] The underwater vehicle jettisoning mechanism of the present invention includes a first sealing structure comprising a first sealing ring, a first groove provided in the middle of the left end of the left end cover, the first sealing ring being fitted into the first groove, the first sealing ring being pressed into the first groove by a left guide sleeve, and the left end of a moving rod being movably inserted through the first sealing ring. The first sealing ring is used to seal the gap between the moving rod and the left end cover. With this structure, under the action of the first sealing ring, the first sealing ring can reliably seal the gap between the moving rod and the left end cover.
[0011] The underwater vehicle jettisoning mechanism of the present invention includes a second sealing structure comprising a second sealing ring. A second groove is provided in the middle of the right end of the right end cover, and the second sealing ring is fitted into the second groove. The second sealing ring is pressed into the second groove by a right guide sleeve. The right end of the moving rod is movably inserted into the second sealing ring. The second sealing ring is used to seal the gap between the moving rod and the right end cover. With this structure, the second sealing ring can reliably seal the gap between the moving rod and the right end cover under the action of the second sealing ring.
[0012] The underwater vehicle jettisoning mechanism of the present invention includes a first bushing embedded in the inner wall of the left guide sleeve located on both sides of the slot, and the left end of the moving rod passes through the two first bushings and is slidably connected to the two first bushings; by setting the first bushings, the sliding of the moving rod can be made smoother when it slides relative to the left guide sleeve.
[0013] The underwater vehicle jettisoning mechanism of the present invention includes a second bushing embedded in the inner wall of the right guide sleeve, and the right end of the moving rod passing through the second bushing and slidably connected to the second bushing; by providing the second bushing, the sliding of the moving rod can be made smoother when it slides relative to the right guide sleeve.
[0014] The underwater vehicle jettisoning mechanism of the present invention has a left-hand diameter larger than the right-hand diameter of the moving rod. With this structure, because the left-hand diameter is larger than the right-hand diameter, when the invention is operating underwater, the water pressure on the left-hand end of the moving rod is greater than the water pressure on the right-hand end. As the invention gradually sinks in the water, the pressure difference between the left-hand and right-hand ends of the moving rod gradually increases, meaning the rightward force F on the moving rod gradually increases. When the sum of the force F and the elastic force exerted by the spring on the ferromagnetic ring exceeds the attraction force of the annular permanent magnet on the ferromagnetic ring, the moving rod moves to the right. At this point, the left-hand end of the moving rod disengages from the slot at the upper end of the connecting rod, meaning the upper end of the connecting rod disengages from the left guide sleeve, thus achieving the jettisoning of the connecting rod and the counterweight. With this structure, the invention can automatically jettison the connecting rod and the counterweight after diving to a certain depth in the water.
[0015] The underwater vehicle jettisoning mechanism of the present invention includes a counterweight block with a countersunk hole vertically arranged in the middle, a connecting rod passing through the countersunk hole from bottom to top, and an annular protrusion on the outer wall of the lower end of the connecting rod. The annular protrusion is used to abut against the lower end of the counterweight block to prevent the counterweight block from detaching from the connecting rod. With this structure, the lower end of the connecting rod can be easily connected to the counterweight block, and the situation of the counterweight block detaching from the connecting rod can be effectively avoided. Attached Figure Description
[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0017] Figure 1 This is a three-dimensional structural diagram of the left end of the movable rod in this invention after it is inserted into the socket located at the upper end of the connecting rod.
[0018] Figure 2This is a cross-sectional view of the structure after the left end of the movable rod in this invention is inserted into the socket located at the upper end of the connecting rod.
[0019] Figure 3 This is a cross-sectional view of the moving rod in this invention after it moves to the right and the left end of the moving rod disengages from the insertion hole located at the upper end of the connecting rod. Detailed Implementation
[0020] The following drawings disclose several embodiments of the present invention. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.
[0021] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, such a combination should be considered nonexistent and not within the scope of protection claimed by this invention.
[0022] like Figure 1-3As shown, the underwater vehicle jettisoning mechanism of the present invention includes a moving rod 1, a coil 2, a support sleeve 3, an annular permanent magnet 4, a clamping sleeve 5, a spring 6, a control board 7, a battery 8, a counterweight 91, a connecting rod 92, and a cylindrical body 10 with openings at both ends and an internal cavity. A left end cap 20 and a right end cap 30 are respectively sealed and fixed at the left and right ends of the cylindrical body 10. An annular support plate 101 is provided on the inner wall of the cylindrical body 10. The coil 2 is embedded in the cylindrical body 10 located to the left of the annular support plate 101, with the right end of the coil 2 abutting against the left end of the annular support plate 101. The support sleeve 3 is embedded in the cylindrical body 10 located to the left of the coil 2, with the right end of the support sleeve 3 abutting against the left end of the coil 2. An annular step 31 is provided on the inner wall of the support sleeve 3. The annular permanent magnet 4 is embedded in the annular step 31 and abuts against the inner end of the annular step 31. The right end of the clamping sleeve 5 is inserted into the annular step 31 and abuts against the left end of the annular permanent magnet 4. The left end of the clamping sleeve 5 abuts against the right end of the left end cover 20. The clamping sleeve 5, the annular permanent magnet 4, the support sleeve 3, and the coil 2 are clamped onto the annular support plate 101 by the left end cover 20. The control board 7 and the battery 8 are fixed in the cylinder 10 located on the right side of the annular support plate 101. A lead wire hole is provided on the side wall of the cylinder 10. The lead wire of the control board 7 is electrically connected to the external power supply unit through the lead wire hole. The space between the lead wire of the control board 7 and the lead wire hole is filled with... The sealant, coil 2, and battery 8 are all electrically connected to the control board 7. The moving rod 1 is movably inserted through the left end cover 20, clamping sleeve 5, annular permanent magnet 4, support sleeve 3, coil 2, annular support plate 101, control board 7, battery 8, and right end cover 30. A first sealing structure and a second sealing structure are respectively provided between the moving rod 1 and the left end cover 20 and right end cover 30. A ferromagnetic ring 11, fixed to the moving rod 1 and with an outer diameter smaller than the inner diameter of the annular permanent magnet 4, is sleeved on the outside of the moving rod 1. A spring 6 is sleeved on the outside of the moving rod 1, with its left end abutting against the right end of the left end cover 20 and its right end abutting against the left end of the ferromagnetic ring 11. The annular permanent magnet 4 exerts an attractive force on the ferromagnetic ring 11. The force exerted by the spring 6 on the ferromagnetic ring 11 is greater than that of the spring. An annular boss 12 is provided on the outer wall of the moving rod 1. When the moving rod 1 moves to the right, the annular boss 12 is used to abut against the left end of the right end cover 30. A left guide sleeve 40 is fixed to the left end of the left end cover 20. The left end of the moving rod 1 is movably inserted into the left guide sleeve 40. A slot 401 is vertically provided in the left guide sleeve 40. The upper end of the connecting rod 92 is inserted into the slot 401. An insertion hole 921 is provided at the upper end of the connecting rod 92. The left end of the moving rod 1 is inserted into the insertion hole 921. The lower end of the moving rod 1 is connected to the counterweight 91. A right guide sleeve 50 is fixed to the right end of the right end cover 30. The right end of the moving rod 1 is movably inserted into the right guide sleeve 50.
[0023] The right end of the left end cover 20 is provided with a first protrusion 201 with an outer diameter smaller than that of the left end cover 20. The first protrusion 201 is inserted into the left end of the cylinder 10. The outer peripheral wall of the first protrusion 201 is in contact with the inner peripheral wall of the cylinder 10. A first annular groove 202 is provided on the outer wall of the first protrusion 201. A first O-ring 203 is embedded in the first annular groove 202. The first O-ring 203 is tightly sealed with the first annular groove 202 and the inner wall of the cylinder 10. With this structure, under the action of the first O-ring, the first O-ring can be tightly sealed with the first annular groove and the inner wall of the cylinder, so that the left end cover can be reliably sealed and connected to the left end of the cylinder. The left end cover can be fixed to the left end of the cylinder by several bolts that are circumferentially spaced.
[0024] The left end of the right end cover 30 is provided with a second protrusion 301 with an outer diameter smaller than that of the right end cover 30. The second protrusion 301 is inserted into the right end of the cylinder 10. The outer peripheral wall of the second protrusion 301 is in contact with the inner peripheral wall of the cylinder 10. A second annular groove 302 is provided on the outer wall of the second protrusion 301. A second O-ring 303 is embedded in the second annular groove 302. The second O-ring 303 is tightly sealed with the second annular groove 302 and the inner wall of the cylinder 10. With this structure, under the action of the second O-ring, the second O-ring can be tightly sealed with the second annular groove and the inner wall of the cylinder, so that the right end cover can be reliably sealed and connected to the right end of the cylinder. The right end cover can be fixed to the right end of the cylinder by a number of bolts distributed circumferentially.
[0025] The first sealing structure includes a first sealing ring 204. A first groove 205 is provided in the middle of the left end of the left end cover 20. The first sealing ring 204 is embedded in the first groove 205. The first sealing ring 204 is pressed into the first groove 205 by the left guide sleeve 40. The left end of the moving rod 1 is movably inserted into the first sealing ring 204. The first sealing ring 204 is used to seal the gap between the moving rod 1 and the left end cover 20. With this structure, the first sealing ring can reliably seal the gap between the moving rod and the left end cover under the action of the first sealing ring.
[0026] The second sealing structure includes a second sealing ring 304. A second groove 305 is provided in the middle of the right end of the right end cover 30. The second sealing ring 304 is embedded in the second groove 305. The second sealing ring 304 is pressed into the second groove 305 by the right guide sleeve 50. The right end of the moving rod 1 is movably inserted into the second sealing ring 304. The second sealing ring 304 is used to seal the gap between the moving rod 1 and the right end cover 30. With this structure, the second sealing ring can reliably seal the gap between the moving rod and the right end cover under the action of the second sealing ring.
[0027] First bushings 402 are embedded in the inner walls of the left guide sleeves 40 on both sides of the slot 401. The left end of the moving rod 1 passes through the two first bushings 402 and is slidably connected to the two first bushings 402. By setting the first bushings, the sliding of the moving rod can be made smoother when it slides relative to the left guide sleeve.
[0028] A second bushing 501 is embedded in the inner wall of the right guide sleeve 50. The right end of the moving rod 1 passes through the second bushing 501 and is slidably connected to the second bushing 501. By setting the second bushing, the sliding of the moving rod can be made smoother when it slides relative to the right guide sleeve.
[0029] The outer diameter of the left end of the moving rod 1 is larger than the outer diameter of the right end. With this structure, since the outer diameter of the left end of the moving rod is larger than the outer diameter of the right end, when the invention is working underwater, the water pressure on the left end of the moving rod will be greater than the water pressure on the right end. As the invention gradually sinks in the water, the pressure difference between the water pressure on the left end and the water pressure on the right end of the moving rod will gradually increase, that is, the force F acting on the moving rod to the right will gradually increase. When the sum of the force F and the elastic force exerted by the spring on the ferromagnetic ring is greater than the attraction force of the annular permanent magnet on the ferromagnetic ring, the moving rod will move to the right. At this time, the left end of the moving rod will disengage from the slot at the upper end of the connecting rod, that is, the upper end of the connecting rod will disengage from the left guide sleeve, thus realizing the unloading of the connecting rod and the counterweight. With the above structure, the invention can achieve automatic unloading of the connecting rod and the counterweight after diving to a certain depth in the water.
[0030] A countersunk hole 911 is vertically provided in the middle of the counterweight 91. The connecting rod 92 passes through the countersunk hole 911 from bottom to top. An annular protrusion 922 is provided on the outer wall of the lower end of the connecting rod 92. The annular protrusion 922 is used to abut against the lower end of the counterweight 91 to prevent the counterweight 91 from detaching from the connecting rod 92. With this structure, the lower end of the connecting rod can be easily connected to the counterweight, and the situation of the counterweight detaching from the connecting rod can be effectively avoided.
[0031] In use, the cylinder can be fixed to the bottom of the underwater vehicle using fasteners, such as clamps. Then, the lead wires of the control board are electrically connected to the power supply unit in the underwater vehicle. In case of an emergency, the power supply unit in the underwater vehicle can stop supplying power to the control board, and the control board can detect the disconnection. At this time, the battery can supply power to the control board, and the control board can connect the coil and keep the coil energized for a period of time (this period only needs to allow the ferromagnetic ring to detach from the ring permanent magnet). When the coil is energized... The coil generates a magnetic field that attracts the ferromagnetic ring. At this point, the sum of the coil's attraction to the ferromagnetic ring and the spring force exerted on it is greater than the attraction of the ring-shaped permanent magnet. This causes the moving rod to move to the right. After the moving rod moves to the right, the annular boss on it abuts against the right end cap to limit its movement. Simultaneously, the left end of the moving rod disengages from the insertion hole at the upper end of the connecting rod, allowing the upper end of the connecting rod to disengage from the left guide sleeve. This enables the unloading of the counterweight and connecting rod. When it is necessary to reload the counterweight and connecting rod, [the following steps are taken]. The connecting rod passes through the counterweight from bottom to top. Then, the upper end of the connecting rod is inserted into the slot on the left guide sleeve. Finally, the right end of the moving rod is pushed with a finger to move it to the left. At this point, the left end of the moving rod can be inserted into the hole at the upper end of the connecting rod, thus loading the counterweight and connecting rod. (After pushing the right end of the moving rod to the left, the ferromagnetic ring overcomes the spring force and is magnetically attracted to the ring permanent magnet, allowing the moving rod to remain in the leftward position.) During this process, after the moving rod moves to the left, the spring can... The ferromagnetic ring acts as a spring force, causing the moving rod to move to the right. The ring-shaped permanent magnet attracts the ferromagnetic ring, and under the combined effect of the spring force and the magnetic attraction of the ring-shaped permanent magnet, the ferromagnetic ring and the moving rod are brought to a critical state of rightward movement. Thus, only a small current needs to be applied to the coil to generate a small magnetic field, which is enough to attract the ferromagnetic ring and move the rod to the right. This method has the advantage of low energy consumption. In addition, when the power supply unit in the underwater vehicle re-energizes the control board, the control board can charge the battery.
[0032] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.
Claims
1. A jettisoning mechanism for an underwater vehicle, characterized in that: The system includes a moving rod (1), a coil (2), a support sleeve (3), an annular permanent magnet (4), a clamping sleeve (5), a spring (6), a control board (7), a battery (8), a counterweight (91), a connecting rod (92), and a cylinder (10) with openings at both ends and an internal cavity. The cylinder (10) has a left end cap (20) and a right end cap (30) sealed at its left and right ends respectively. An annular support plate (101) is provided on the inner wall of the cylinder (10). The coil (2) is embedded in the cylinder (10) located to the left of the annular support plate (101), with the right end of the coil (2) abutting against the left end of the annular support plate (101). The support sleeve (3) is embedded in the cylinder (10) located to the left of the coil (2). The right end of the support sleeve (3) abuts against the left end of the coil (2) in the cylinder (10) on the left side. An annular step (31) is provided on the inner wall of the support sleeve (3). The annular permanent magnet (4) is embedded in the annular step (31) and abuts against the inner end of the annular step (31). The right end of the clamping sleeve (5) is inserted into the annular step (31) and abuts against the left end of the annular permanent magnet (4). The left end of the clamping sleeve (5) abuts against the right end of the left end cover (20). The clamping sleeve (5), the annular permanent magnet (4), the support sleeve (3) and the coil (2) are pressed against the annular support plate (101) by the left end cover (20). The control board (7) and the battery (8) are fixed on the annular support plate (101) located on the left side. In the cylinder (10) on the right side of the annular support plate (101), a lead wire hole is provided on the side wall of the cylinder (10). The lead wire of the control board (7) is electrically connected to the external power supply unit through the lead wire hole. The lead wire of the control board (7) and the lead wire hole are filled with sealant. The coil (2) and the battery (8) are both electrically connected to the control board (7). The moving rod (1) is movably inserted through the left end cover (20), the clamping sleeve (5), the annular permanent magnet (4), the support sleeve (3), the coil (2), the annular support plate (101), the control board (7), the battery (8), and the right end cover (30). The moving rod (1) is respectively provided with a first seal between the left end cover (20) and the right end cover (30). The sealing structure and the second sealing structure are provided. The outside of the moving rod (1) is fitted with a ferromagnetic ring (11) that is fixed to the moving rod (1) and whose outer diameter is smaller than the inner diameter of the annular permanent magnet (4). The spring (6) is fitted on the outside of the moving rod (1). The left end of the spring (6) abuts against the right end of the left end cover (20). The right end of the spring (6) abuts against the left end of the ferromagnetic ring (11). The attraction of the annular permanent magnet (4) to the ferromagnetic ring (11) is greater than the elastic force applied by the spring (6) to the ferromagnetic ring (11). An annular boss (12) is provided on the outer wall of the moving rod (1). When the moving rod (1) moves to the right, the annular boss (12) is used to abut against the left end of the right end cover (30).The left end of the left end cover (20) is fixed with a left guide sleeve (40), and the left end of the moving rod (1) is movably inserted into the left guide sleeve (40). A slot (401) is vertically arranged in the left guide sleeve (40), and the upper end of the connecting rod (92) is inserted into the slot (401). An insertion hole (921) is provided at the upper end of the connecting rod (92), and the left end of the moving rod (1) is inserted into the insertion hole (921). The lower end of the moving rod (1) is connected to the counterweight (91). The right end of the right end cover (30) is fixed with a right guide sleeve (50), and the right end of the moving rod (1) is movably inserted into the right guide sleeve (50).
2. The jettisoning mechanism for underwater vehicles according to claim 1, characterized in that, The right end of the left end cap (20) is provided with a first protrusion (201) with an outer diameter smaller than that of the left end cap (20). The first protrusion (201) is inserted into the left end of the cylinder (10). The outer peripheral wall of the first protrusion (201) is in contact with the inner peripheral wall of the cylinder (10). A first annular groove (202) is provided on the outer wall of the first protrusion (201). A first O-ring (203) is embedded in the first annular groove (202). The first O-ring (203) is tightly sealed with the first annular groove (202) and the inner wall of the cylinder (10).
3. The jettisoning mechanism for underwater vehicles according to claim 1, characterized in that, The left end of the right end cap (30) is provided with a second protrusion (301) with an outer diameter smaller than that of the right end cap (30). The second protrusion (301) is inserted into the right end of the cylinder (10). The outer peripheral wall of the second protrusion (301) is in contact with the inner peripheral wall of the cylinder (10). A second annular groove (302) is provided on the outer wall of the second protrusion (301). A second O-ring (303) is embedded in the second annular groove (302). The second O-ring (303) is tightly sealed with the second annular groove (302) and the inner wall of the cylinder (10).
4. The jettisoning mechanism for underwater vehicles according to claim 1, characterized in that, The first sealing structure includes a first sealing ring (204). A first groove (205) is provided in the middle of the left end of the left end cover (20). The first sealing ring (204) is embedded in the first groove (205). The first sealing ring (204) is pressed into the first groove (205) by the left guide sleeve (40). The left end of the moving rod (1) is movably inserted into the first sealing ring (204). The first sealing ring (204) is used to seal the gap between the moving rod (1) and the left end cover (20).
5. The jettisoning mechanism for underwater vehicles according to claim 1, characterized in that, The second sealing structure includes a second sealing ring (304). A second groove (305) is provided in the middle of the right end of the right end cover (30). The second sealing ring (304) is embedded in the second groove (305). The second sealing ring (304) is pressed into the second groove (305) by the right guide sleeve (50). The right end of the moving rod (1) is movably inserted into the second sealing ring (304). The second sealing ring (304) is used to seal the gap between the moving rod (1) and the right end cover (30).
6. The jettisoning mechanism for underwater vehicles according to claim 1, characterized in that, The inner walls of the left guide sleeves (40) located on the left and right sides of the slot (401) are each fitted with a first bushing (402). The left end of the moving rod (1) passes through the two first bushings (402) and is slidably connected to the two first bushings (402).
7. The jettisoning mechanism for underwater vehicles according to claim 1, characterized in that, The inner wall of the right guide sleeve (50) is fitted with a second bushing (501), and the right end of the moving rod (1) passes through the second bushing (501) and is slidably connected to the second bushing (501).
8. The jettisoning mechanism for underwater vehicles according to any one of claims 1-7, characterized in that, The outer diameter of the left end of the moving rod (1) is greater than the outer diameter of the right end of the moving rod (1).
9. The jettisoning mechanism for underwater vehicles according to any one of claims 1-7, characterized in that, The counterweight (91) has a countersunk hole (911) vertically arranged in the middle. The connecting rod (92) passes through the countersunk hole (911) from bottom to top. The outer wall of the lower end of the connecting rod (92) is provided with an annular protrusion (922). The annular protrusion (922) is used to abut against the lower end of the counterweight (91) to prevent the counterweight (91) from detaching from the connecting rod (92).