Underwater vehicle jettisoning device

Abstract

The present invention relates to the technical field of underwater vehicles, and in particular to a device for jettisoning underwater vehicles. The device comprises a front connecting frame, a rear connecting frame and a jettisoning box, wherein the front connecting frame and the rear connecting frame are respectively provided with a touch rod; the jettisoning box is located between the front connecting frame and the rear connecting frame, and the front connecting frame and / or the rear connecting frame are provided with a driving device for driving the jettisoning box to move; a jettisoning assembly, a first support seat and a jettisoning block are provided in the jettisoning box, and the jettisoning assembly comprises a fixed seat, a second support seat, a transmission rod and a support seat tension spring; the second support seat can move in the front-to-back direction on the fixed seat, and the jettisoning block is positioned and supported between the two support seats; the support seat tension spring is used to apply an elastic force to the second support seat, forcing it to move away from the jettisoning block; one end of the transmission rod has a touch portion, and the other end thereof is provided with a limit portion for limiting cooperation with the second support seat; the jettisoning assembly also includes a retaining structure for maintaining the limit portion in limited cooperation with the second support seat.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater vehicles, and in particular to a jettisoning device for underwater vehicles. Background Art

[0002] As the primary tool for replacing humans in ocean exploration, underwater vehicles are widely used in military and civilian fields, including unmanned island and reef patrols, seafloor mapping, offshore drilling platforms, and offshore wind power operation and maintenance. As underwater exploration missions become increasingly complex and diverse, higher requirements are placed on underwater vehicles for long-endurance, safe, and reliable navigation performance.

[0003] Underwater vehicles have very limited onboard energy, and currently, conventional power is primarily provided by propellers and steering gear. These consume significant energy during underwater navigation, significantly reducing the vehicle's range. Furthermore, emergency jettisoning devices, essential for underwater vehicles, must jettison load blocks to increase the vehicle's buoyancy and enable emergency ascent in the event of power loss, collision damage, or other emergencies. Traditional jettisoning methods, such as electromagnets, require constant power to maintain adsorption, similarly consuming significant energy.

[0004] The Chinese invention patent application with application publication number CN111731461A discloses an underwater load-jetting mechanism, which uses an electromagnetic connection between a de-energized electromagnet and a ferromagnetic disk. When the power is off, the de-energized electromagnet and the ferromagnetic disk are adsorbed together, so that the weight is suspended on the second lever; when the power is on, the magnetism of the de-energized electromagnet disappears, the connection between the de-energized electromagnet and the ferromagnetic disk is disconnected, and the second lever rotates, so that the weight is released.

[0005] Since the power-off electromagnet is not energized when the weight is in a suspended state, and is energized only when the weight needs to be released, the energy loss of the underwater vehicle can be reduced. However, it still cannot solve the problem that the underwater vehicle consumes more energy when sailing underwater using the power provided by the thrusters and servos. Summary of the Invention

[0006] The object of the present invention is to provide an underwater vehicle jettisoning device to solve the problem in the prior art that underwater vehicles consume a lot of energy when navigating underwater using the power provided by a propeller and a steering gear.

[0007] To achieve the above-mentioned purpose, the technical solution of the underwater vehicle jettisoning device of the present invention is:

[0008] The underwater vehicle jettisoning device comprises a front connecting frame, a rear connecting frame and a jettisoning box, wherein the front connecting frame and / or the rear connecting frame are provided with a touch rod; the jettisoning box is located between the front connecting frame and the rear connecting frame, and the front connecting frame and / or the rear connecting frame are provided with a driving device for driving the jettisoning box to move in the front and rear directions; a jettisoning assembly, a first supporting seat and a jettisoning block are provided in the jettisoning box, and the jettisoning box has a jettisoning port facing downward for the jettisoning block to fall, and the jettisoning assembly comprises a fixed seat, a second supporting seat, a transmission rod and a support seat tension spring, the fixed seat is fixed to the corresponding box wall of the jettisoning box, the second supporting seat can move in the front and rear directions on the fixed seat, and the jettisoning block is fixed in the front and rear directions. The support is between the first support seat and the second support seat; one end of the support seat tension spring is connected to the jettisoning box, and the other end of the support seat tension spring is connected to the second support seat, and the support seat tension spring is used to apply an elastic force to the second support seat to force it away from the jettisoning block; the end of the transmission rod away from the jettisoning block has a touch portion for the corresponding touch rod to touch, and the end of the transmission rod close to the jettisoning block is provided with a limiting portion or the end of the transmission rod close to the jettisoning block is connected to the limiting portion, and the limiting portion is used to cooperate with the second support seat to limit the second support seat to the position supporting the jettisoning block; the jettisoning assembly also includes a retaining structure to keep the limiting portion and the second support seat in position.

[0009] The beneficial effect is that the underwater vehicle jettisoning device of the present invention integrates the jettisoning function and the center of mass adjustment function. The driving device drives the jettisoning box to move in the front-to-back direction to change the center of mass of the vehicle, causing the pitch angle of the vehicle to change during navigation, thereby enabling the vehicle to adjust its initial attitude and glide in different water environments. During this process, only the main propeller is working, while the steering gear and auxiliary propeller are not working, which can significantly reduce the power energy consumption of the vehicle. In an emergency, the driving device drives the transmission rod to drive the limit part to move, so that the jettisoning block in the jettisoning box can be dropped in time, increasing the positive buoyancy of the vehicle and floating in time to ensure navigation safety. This process consumes less energy. Moreover, the jettisoning function and the center of mass adjustment function can be achieved with only one set of driving devices, simplifying the structure of the vehicle.

[0010] As a further improvement, the jettisoning assembly also includes a limit rod, an end of the limit rod away from the jettisoning block is hinged on the fixed seat, and an end of the limit rod close to the jettisoning block is hinged to the transmission rod, the limit part is arranged on the limit rod and is located between the two hinged positions of the limit rod, and the retaining structure is a retaining spring; the transmission rod close to the jettisoning block is provided with a pushing part, which is used to push and cooperate with the bottom of the second support seat when the touching rod touches the touching part of the transmission rod, so as to drive the end of the limit rod close to the jettisoning block to rotate in the direction away from the second support seat, thereby releasing the limit on the second support seat by the limit part.

[0011] The beneficial effect is: when the touch rod touches the touch part of the transmission rod, the pushing part cooperates with the bottom pushing of the second support seat, so that the transmission rod drives the end of the limit rod close to the throw-load block to rotate in the direction away from the second support seat, which is conducive to the limiting part to release the limit on the second support seat.

[0012] As a further improvement, the retaining structure includes a retaining rod and a retaining spring, the end of the retaining rod away from the throw-off block is hinged on the fixed seat, the end of the retaining rod close to the throw-off block is hinged to the transmission rod, and the retaining spring is used to apply an elastic force to the retaining rod to force the end close to the throw-off block to rotate toward the second support seat, so that the limiting part at the end of the transmission rod is matched with the limiting part of the second support seat.

[0013] The beneficial effect is that, since the size of the retaining rod is small, only a small elastic force is required to keep the retaining rod in the set position, thus facilitating the stability of the retaining rod.

[0014] As a further improvement, the dumping assembly is used as a rear dumping assembly, and a front dumping assembly with the same structure as the rear dumping assembly is further provided in the dumping box, and the front dumping assembly includes the first support seat.

[0015] The beneficial effect is that, with this design, no matter whether the driving device drives the dumping box to move forward or backward to the set position, the dumping block can be dropped.

[0016] As a further improvement, the driving device includes a screw and a driving motor for driving the screw to rotate. The screw is rotatably assembled on the front connecting frame and the rear connecting frame, and the jettisoning box is threadedly connected to the screw to form a screw nut mechanism with the screw.

[0017] The beneficial effect is that since the lead screw can be rotatably assembled on the front connecting frame and the rear connecting frame, only the drive motor and the end of the lead screw will protrude from the corresponding connecting frame, making the structure of the underwater vehicle jettisoning device more compact.

[0018] As a further improvement, the throw-off block is located directly below the lead screw.

[0019] The beneficial effect is that: with this design, there is no need to set up a guide column, and when the dump box moves in the front and rear directions, the dump box is kept from rotating by relying on its own gravity.

[0020] As a further improvement, the transmission rod is an L-shaped rod.

[0021] The beneficial effect is that the L-shaped rod is more convenient to process.

[0022] As a further improvement, the retaining spring is a retaining tension spring or a retaining torsion spring.

[0023] The beneficial effect is that the retaining tension spring and the retaining torsion spring are both easier to install, which is beneficial for assembly.

[0024] As a further improvement, a touch plate is provided at the end of the transmission rod away from the throw-off block, the cross-sectional dimension of the touch plate is larger than the cross-sectional dimension of the transmission rod, and the touch plate constitutes the touch portion.

[0025] The beneficial effect is that such a design increases the touching area of ​​the touching portion, ensuring that the touching rod stably touches the transmission rod.

[0026] As a further improvement, the transmission rod is located in a jettisoning box, and a through hole for the touch rod to pass through is provided on the wall of the jettisoning box.

[0027] The beneficial effect is that, with this design, the transmission rod is less affected by the water flow, so that there will not be too much deviation between the transmission rod and the touch rod, thereby ensuring that the contact parts of the touch rod and the transmission rod touch each other stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a first embodiment of the underwater vehicle jettisoning device of the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the structure of the mid-jet load box;

[0030] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 This is a schematic structural diagram of the jettisoning box of Example 2 of the underwater vehicle jettisoning device of the present invention.

[0032] In the figure: 11. Front connecting frame; 12. Rear connecting frame; 13. Load throwing box; 14. Touch rod; 15. Lead screw; 16. Coupling; 17. Drive motor; 18. Guide column; 19. Load throwing block; 20. Support seat; 21. Limiting part; 22. Support seat tension spring; 23. Fixed seat; 24. Touch part; 25. Transmission rod; 26. Retaining tension spring; 27. Limiting rod; 28. Pushing part; 29. ​​Retaining rod. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0035] It should be noted that relational terms such as "first" and "second" that may appear are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include," "comprise," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, elements defined by the phrase "including a..." do not exclude the presence of other identical elements in the process, method, article, or device that includes the elements. In addition, the terms "front," "back," "up," "down," "left," and "right" are based on the orientation and positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or component referred to must have a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0037] Embodiment 1 of the underwater vehicle jettisoning device of the present invention:

[0038] like Figure 1 As shown, the underwater vehicle jettisoning device includes a front connecting frame 11, a rear connecting frame 12 and a jettisoning box 13. The front connecting frame 11 and the rear connecting frame 12 are respectively provided with a touch rod 14 on the opposite sides. The jettisoning box 13 is located between the front connecting frame 11 and the rear connecting frame 12.

[0039] In this embodiment, the front and rear connecting frames 11 and 12 are equipped with a drive mechanism for driving the jettisoning box 13 in the fore-aft direction. Specifically, the drive mechanism includes a lead screw 15 and a drive motor 17. The lead screw 15 is rotatably mounted on the front and rear connecting frames 11 and 12, respectively. The drive motor 17 drives the lead screw 15 through a coupling 16. The jettisoning box 13 is threadedly connected to the lead screw 15, forming a lead screw-nut mechanism with the lead screw 15. The drive motor 17 drives the lead screw 15 to rotate, thereby driving the jettisoning box 13 in the fore-aft direction.

[0040] In this embodiment, in order to prevent the jettison box 13 from rotating when moving in the front and rear directions, a guide column 18 extending along the front and rear directions is further provided between the front connecting frame 11 and the rear connecting frame 12. The guide column 18 passes through the jettison box 13 to guide the jettison box 13.

[0041] like Figure 1 and Figure 2 As shown, the dump box 13 is equipped with a front dump assembly and a rear dump assembly spaced apart in the front-to-back direction. A dump block 19 is located between the two dump assemblies. The dump box 13 has a downward-facing dump opening for the dump block 19 to be released. Since the dump block 19 is located directly below the lead screw 15, the guide post 18 is not required. As the dump box 13 moves in the front-to-back direction, its own weight prevents it from rotating. In other embodiments, the dump block and lead screw may be spaced apart in the left-to-right direction, in which case the guide post is required.

[0042] In this embodiment, the structures of the front dumping load assembly and the rear dumping load assembly are the same, and the front dumping load assembly is taken as an example for specific description. Figure 2 and Figure 3 As shown, the front load jettisoning assembly includes a fixed seat 23, a support seat 20, a transmission rod 25, a limiting rod 27, and a support seat tension spring 22. The fixed seat 23 is fixed to the front wall of the jettisoning box 13. The support seat 20 can be guided and moved in the front-to-back direction on the fixed seat 23. The jettisoning block 19 is positioned and supported between the two support seats 20 in the front-to-back direction. One end of the support seat tension spring 22 is connected to the front wall of the jettisoning box 13, and the other end is connected to the support seat 20. The support seat tension spring 22 is used to apply an elastic force to the support seat 20, forcing it away from the jettisoning block 19. The transmission rod 25 is an L-shaped rod.

[0043] In this embodiment, the end of the transmission rod 25 away from the load-bearing block 19 has a contact portion 24 for contact with the contact rod 14, and the end of the transmission rod 25 near the load-bearing block 19 has a push portion 28. The end of the limit rod 27 away from the load-bearing block 19 is hinged to the fixed seat 23, and the end of the limit rod 27 near the load-bearing block 19 is hinged to the transmission rod 25. The limit rod 27 is provided with a limit portion 21, which is located between the two hinged positions of the limit rod 27. The limit portion 21 is used to engage with the protrusion on the bottom side of the support seat 20 to limit the support seat 20 to a position supporting the load-bearing block 19. The load-bearing assembly also includes a retaining spring 26 that maintains the retaining engagement between the limit portion 21 and the support seat 20, and the retaining spring 26 constitutes a retaining structure.

[0044] In this embodiment, the front support base 20 constitutes a first support base, and the rear support base 20 constitutes a second support base.

[0045] In this embodiment, the contact portion 24 is a contact plate disposed at the end of the transmission rod 25 away from the throw-load block 19. The cross-sectional dimensions of the contact plate are larger than those of the transmission rod 25. This design increases the contact area of ​​the contact portion 24 and ensures that the contact rod 14 stably contacts the transmission rod 25. In other embodiments, the transmission rod may not be provided with a contact plate, and the cross-sectional dimensions of the transmission rod may be larger, with the end of the transmission rod constituting the contact portion.

[0046] In this embodiment, through holes are provided on the front and rear side walls of the jettison box 13 , and the through holes allow the touch rod 14 to pass through to touch the touch portion 24 of the transmission rod 25 .

[0047] When in use, the underwater vehicle jettisoning device of this embodiment is installed at the front of the vehicle. In the initial state after the vehicle is launched into the water, the drive motor 17 drives the screw 15 to rotate through the coupling 16 to drive the jettisoning box 13 to move forward and backward until the vehicle is in a balanced state. When the vehicle starts to sail, the jettisoning box 13 moves forward and backward to make the vehicle enter the gliding mode, specifically as follows: (1) During the vehicle's diving process, the jettisoning box 13 moves forward continuously, the vehicle's angle of attack is positive, and it begins to dive under the action of the main propeller. When it gradually approaches the desired target depth, the drive motor 17 drives the jettisoning box 13 to move backward, so that the vehicle's angle of attack continuously approaches zero, and this cycle repeats until the vehicle reaches the target depth. (2) During the vehicle's ascent process, the jettisoning box 13 moves backward continuously, the vehicle's angle of attack is negative, and it begins to ascent under the action of the main propeller. When it gradually approaches the desired target depth, the drive motor 17 drives the jettisoning box 13 to move forward, so that the vehicle's angle of attack continuously approaches zero, and this cycle repeats until the vehicle reaches the target depth.

[0048] During the normal gliding of the aircraft, the two support seat tension springs 22 are always in a stretched stress state, and under the action of the two retaining tension springs 26, the limiting parts 21 on the two limiting rods 27 cooperate with the support seat 20 to limit the two support seats 20, so that the two support seats 20 position and support the jettisoning block 19, thereby ensuring that the jettisoning block 19 is fixed. When the aircraft encounters an emergency situation such as power loss, water ingress in the cabin, collision, etc., the drive motor 17 drives the jettisoning box 13 to move to the extreme position at the left or right end, and the touch rod 14 touches the touch part 24 of the corresponding transmission rod 25. Since the support seat 20 is fixed, the pushing part 28 of the transmission rod 25 cooperates with the bottom pushing of the support seat 20, driving the end of the limit rod 27 close to the jettisoning block 19 to rotate away from the support seat 20, thereby releasing the limit part 21 on the support seat 20; at this time, under the action of the corresponding support seat tension spring 22, the corresponding support seat 20 is pulled away, the jettisoning block 19 falls, the buoyancy of the aircraft increases and it floats up urgently.

[0049] The underwater vehicle jettisoning device of the present invention integrates jettisoning and center of mass adjustment functions. By moving a jettisoning box containing a jettisoning block forward and backward, the center of mass of the vehicle is altered, causing the pitch angle of the vehicle to change during navigation. This in turn enables the vehicle to adjust its initial attitude and glide in various water environments. During this process, only the main propeller operates, while the steering gear and auxiliary propellers do not, significantly reducing the vehicle's power consumption. In an emergency, the jettisoning block in the box can be promptly dropped, increasing the positive buoyancy of the vehicle and allowing it to ascend promptly to ensure navigation safety. Furthermore, a single drive unit is required to achieve both the jettisoning and center of mass adjustment functions, simplifying the vehicle's structure.

[0050] Embodiment 2 of the underwater vehicle jettisoning device of the present invention:

[0051] The difference between this embodiment and embodiment 1 is that in embodiment 1, the limiting portion 21 is provided on the limiting rod 27, the transmission rod 25 is hinged to the limiting rod 27 to drive the limiting portion 21 to move, wherein the holding structure is a holding tension spring 26. In this embodiment, Figure 4 As shown, the limiting portion 21 is arranged on the transmission rod 25, and the retaining structure includes a retaining rod 29 and a retaining tension spring 26. The end of the retaining rod 29 away from the throw-off block 19 is hinged on the fixed seat 23, and the end of the retaining rod 29 close to the throw-off block 19 is hinged to the transmission rod 25. The retaining tension spring 26 is used to apply an elastic force to the retaining rod 29 to force the end close to the throw-off block 19 to rotate toward the support seat 20, so that the limiting portion 21 at the end of the transmission rod 25 is limited and matched with the support seat 20.

[0052] In other embodiments, the retaining rod may not be provided, and only a retaining spring may be provided. In this case, the transmission rod is hinged to the fixed seat, one end of the retaining spring is connected to the fixed seat, and the other end of the retaining spring is connected to the transmission rod and is below the hinged position of the transmission rod.

[0053] Embodiment 3 of the underwater vehicle jettisoning device of the present invention:

[0054] The difference between this embodiment and embodiment 1 is that, whereas in embodiment 1, the jettison box is provided with a front jettison assembly and a rear jettison assembly, and the two jettison assemblies have the same structure, this embodiment is provided with a rear jettison assembly and a first support base. The support base included in the rear jettison assembly is the second support base, and the first support base can be fixed to a fixed base or directly to the front box wall.

[0055] Embodiment 4 of the underwater vehicle jettisoning device of the present invention:

[0056] The difference between this embodiment and embodiment 1 is that in embodiment 1, the driving device includes a lead screw and a driving motor, and the driving motor drives the lead screw to rotate to drive the jettisoning box to move forward and backward. In this embodiment, the driving device is an electric push rod.

[0057] Embodiment 5 of the underwater vehicle jettisoning device of the present invention:

[0058] The difference between this embodiment and embodiment 1 is that in embodiment 1, the retaining spring is a retaining tension spring, while in this embodiment, the retaining spring is a retaining torsion spring.

[0059] Embodiment 6 of the underwater vehicle jettisoning device of the present invention:

[0060] This embodiment differs from Example 1 in that, in Example 1, the transmission rod is located within the jettisoning box, and a through-hole is provided in the wall of the jettisoning box for the contact rod to pass through. In this embodiment, the transmission rod is located within the jettisoning box, and a downwardly facing notch is provided in the wall of the jettisoning box for the contact rod to pass through. In other embodiments, the transmission rod may be located outside the jettisoning box, in which case neither the through-hole nor the notch is required.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An underwater vehicle jettisoning device, characterized in that: The invention comprises a front connecting frame (11), a rear connecting frame (12) and a dumping box (13), wherein a touch rod (14) is provided on the front connecting frame (11) and / or the rear connecting frame (12); the dumping box (13) is located between the front connecting frame (11) and the rear connecting frame (12); a driving device for driving the dumping box (13) to move in a front-back direction is provided on the front connecting frame (11) and / or the rear connecting frame (12); a dumping assembly, a first supporting seat and a dumping block (19) are provided in the dumping box (13); the dumping box (13) has a dumping port facing downward for the dumping block (19) to fall down; the dumping assembly includes a first support seat and a dumping block (19); the first support seat and the dumping block (19) are provided in the dumping box (13 ... The invention comprises a fixed seat (23), a second support seat, a transmission rod (25) and a support seat tension spring (22), wherein the fixed seat (23) is fixed on the corresponding box wall of the dumping box (13), the second support seat can move on the fixed seat (23) in the front-back direction, and the dumping block (19) is positioned and supported between the first support seat and the second support seat in the front-back direction; one end of the support seat tension spring (22) is connected to the dumping box (13), and the other end of the support seat tension spring (22) is connected to the second support seat, and the support seat tension spring (22) is used to apply an elastic force to the second support seat to force it to move away from the dumping block (19); The end of the transmission rod (25) away from the throwing load block (19) has a touch portion (24) for contact by the corresponding touch rod (14), and the end of the transmission rod (25) close to the throwing load block (19) is provided with a limiting portion (21) or the end of the transmission rod (25) close to the throwing load block (19) is connected to the limiting portion (21), and the limiting portion (21) is used to cooperate with the second support seat to limit the second support seat at a position supporting the throwing load block (19); the throwing load assembly also includes a holding structure for keeping the limiting portion (21) in limited cooperation with the second support seat.

2. The underwater vehicle jettisoning device according to claim 1, characterized in that: The jettisoning assembly further comprises a limiting rod (27), one end of the limiting rod (27) away from the jettisoning block (19) is hinged on the fixing seat (23), and one end of the limiting rod (27) close to the jettisoning block (19) is hinged to the transmission rod (25), the limiting portion (21) is arranged on the limiting rod (27) and is located between two hinged positions of the limiting rod (27), and the holding structure is a holding spring; the end of the transmission rod (25) close to the jettisoning block (19) is provided with a pushing portion (28), and the pushing portion (28) is used to push and cooperate with the bottom of the second support seat when the touching rod (14) touches the touching portion (24) of the transmission rod (25), so as to drive the end of the limiting rod (27) close to the jettisoning block (19) to rotate in a direction away from the second support seat, thereby releasing the limiting portion (21) from limiting the second support seat.

3. The underwater vehicle jettisoning device according to claim 1, characterized in that: The holding structure comprises a holding rod (29) and a holding spring, wherein one end of the holding rod (29) away from the throw-load block (19) is hinged on the fixing seat (23), and one end of the holding rod (29) close to the throw-load block (19) is hinged to the transmission rod (25), and the holding spring is used to apply an elastic force to the holding rod (29) to force the end close to the throw-load block (19) to rotate toward the second support seat, so that the limiting portion (21) at the end of the transmission rod (25) is limitedly matched with the second support seat.

4. The underwater vehicle jettisoning device according to claim 1, 2 or 3, characterized in that: The dumping assembly is used as a rear dumping assembly, and a front dumping assembly having the same structure as the rear dumping assembly is further provided in the dumping box (13), and the front dumping assembly includes the first support seat.

5. The underwater vehicle jettisoning device according to claim 1, 2 or 3, characterized in that: The driving device comprises a lead screw (15) and a driving motor (17) for driving the lead screw (15) to rotate. The lead screw (15) is rotatably mounted on a front connecting frame (11) and a rear connecting frame (12). The jettisoning box (13) is threadedly connected to the lead screw (15) to form a lead screw nut mechanism with the lead screw (15).

6. The underwater vehicle jettisoning device according to claim 5, characterized in that: The throw-off block (19) is located directly below the lead screw (15).

7. The underwater vehicle jettisoning device according to claim 1, 2 or 3, characterized in that: The transmission rod (25) is an L-shaped rod.

8. The underwater vehicle jettisoning device according to claim 2 or 3, characterized in that: The retaining spring is a retaining tension spring (26) or a retaining torsion spring.

9. The underwater vehicle jettisoning device according to claim 1, 2 or 3, characterized in that: The end of the transmission rod (25) away from the throwing block (19) is provided with a touch plate, the cross-sectional dimension of the touch plate is larger than the cross-sectional dimension of the transmission rod (25), and the touch plate constitutes the touch portion (24).

10. The underwater vehicle jettisoning device according to claim 1, 2 or 3, characterized in that: The transmission rod (25) is located in the dumping box (13), and a through hole for the touch rod (14) to pass through is provided on the wall of the dumping box (13).

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