A boat launching and launching device and a vessel

Abstract

This invention belongs to the field of boat and vessel deployment and recovery technology, and discloses a boat and vessel deployment and recovery device and a vessel. The boat and vessel deployment and recovery device comprises multiple ramp components that are rotatably connected in sequence, allowing the ramp structure to be placed on the vessel in a rolled-up state. When the boat needs to be retrieved or released, the ramp structure is unfolded by the deployment and recovery mechanism, placing the boat on the ramp structure. A lifting mechanism then moves the boat along the ramp structure, achieving the retrieval or release of the boat. After the boat has finished moving, the ramp structure returns to its rolled-up state and is stored on the vessel. This boat and vessel deployment and recovery device saves space on the vessel, expands the effective usable area of ​​the deck, and allows for the installation of different numbers of ramp components to adjust the length and slope of the ramp structure according to the vessel's freeboard. It has good practicality, is simple to design, and is safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of boat launching and recovery technology, and in particular to a boat launching and recovery device and a vessel. Background Technology

[0002] With the rapid development of science and technology and the deepening understanding of unmanned systems, the application potential of unmanned surface vessels (USVs) in navigation, detection, search and rescue, and other fields is becoming increasingly prominent. In practical applications, the higher the degree of automation in the deployment and retrieval process of USVs and the faster they enter working condition, the more efficient they become and the higher their mission success rate.

[0003] However, the deployment and retrieval technology compatible with unmanned surface vessels (USVs) is relatively lagging behind. Currently, the main research directions for USV deployment and retrieval technology both domestically and internationally include hoisting deployment, stern-slipway deployment, and dock-based rapid deployment. Hoisting deployment requires lifting equipment, wave compensation systems, and automatic leveling dual-winch systems, limiting its usability. Stern-slipway deployment requires recesses in the stern deck of the wooden boat to accommodate the slipway, wasting deck space on the mother ship. Dock-based rapid deployment requires a dock at the stern for flooding the mother ship, making the operation quite complex.

[0004] Therefore, there is an urgent need for a boat launching and launching device and a vessel to solve the above problems. Summary of the Invention

[0005] One objective of this invention is to provide a boat launching and retrieving device that can be rolled up on the deck of a ship, occupies little deck area, has a simple movement mechanism, and ensures the safe launching and retrieving of boats.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A boat launching and retrieving device is provided, comprising:

[0008] Multiple ramp components are rotatably connected in sequence to form a ramp structure. The top of the ramp structure is fixed to the ship. The ramp structure includes a rolled-up state and an unfolded state. When in the rolled-up state, the ramp structure is rolled up to the ship. When in the unfolded state, the bottom of the ramp structure extends into the water.

[0009] The mechanism includes a winch and a cable. The winch is fixed to the vessel, and one end of the cable is wound around the winch, while the other end is connected to the bottom of the ramp structure.

[0010] The lifting mechanism includes a lifting winch and a lifting cable. The lifting winch is fixed to the vessel, and one end of the lifting cable is wound around the lifting winch, while the other end is used to connect to the vessel to be retrieved or launched.

[0011] As an optional solution for a boat launching and launching device, the ramp assembly includes a crossbeam and multiple longitudinal beams. The longitudinal beams extend along the direction of the ramp structure, and the multiple longitudinal beams are parallel to each other and spaced apart. The crossbeam is connected between two adjacent longitudinal beams, and the multiple longitudinal beams of adjacent ramp assemblies correspond one-to-one and are rotatably connected.

[0012] As an alternative to the boat launching and retrieving device, the ramp assembly also includes rollers that are fitted onto the crossbeam and rotate around the crossbeam.

[0013] As an optional solution for the boat launching and retracting device, the ramp assembly also includes a support structure connected to the longitudinal beam. When the ramp structure is in the retracted state, the support structures of two adjacent ramp assemblies abut against each other, and the support structures located at the bottom and top of the ramp structure abut against each other.

[0014] As an alternative to the boat launching and retrieving device, the boat launching and retrieving device includes two launching and retrieving mechanisms, which are respectively connected to both sides of the ramp structure.

[0015] As an optional solution for the boat launching and retrieving device, the lifting mechanism further includes a guide cable, the two ends of which are slidably connected to the two launching and retrieving cables, and the lifting cable is connected to the guide cable.

[0016] As an optional solution for the boat launching and retrieving device, the launching and retrieving mechanism further includes multiple connectors, and the ramp assembly further includes at least two sleeves. The two sleeves are respectively disposed at the top and bottom of the ramp assembly and extend along the direction of the ramp structure. When the ramp structure is in the deployed state, one connector is inserted into the sleeves disposed at the bottom and top of two adjacent ramp assemblies.

[0017] As an optional solution for the boat launching and retrieving device, the launching and retrieving cable is configured as a ring cable, including a lifting part, a winding part, and a fixing part. The lifting part is connected to the bottom of the ramp structure, the winding part is wound around the launching and retrieving winch, the fixing part is passed through all the sleeves, and a plurality of the plug-in parts are spaced apart and connected to the fixing part. The launching and retrieving cable drives the plug-in parts to move relative to the ramp structure when the ramp structure is launched and retrieving.

[0018] Another objective of this invention is to provide a vessel that can flexibly install several boat launching and retraction devices at the stern and sides of the hull, saving deck space and facilitating boat transportation.

[0019] To achieve this objective, the present invention adopts the following technical solution:

[0020] A vessel is provided, comprising: a hull and a plurality of the aforementioned boat launching and retracting devices, wherein the boat launching and retracting devices are fixed to the stern of the hull;

[0021] And / or, the boat launching and retraction device is located on the side of the hull.

[0022] As an alternative to the vessel, the hull is provided with several bevels, each of which corresponds to a vessel deployment and retraction device. When the ramp structure is in the deployed state, the bevels are supported below the ramp structure.

[0023] The beneficial effects of this invention are:

[0024] This invention provides a boat launching and recovering device. Multiple ramp components are rotatably connected in sequence, allowing the ramp structure to be placed on the vessel in a coiled state when boat recovery or recovery is not required. When boat recovery or recovery is needed, the rotation of the launching winch first releases the launching cable, allowing the bottom of the ramp structure to extend into the water and become deployed. Then, the end of the lifting cable is connected to the boat to be recovered or released, and the boat is placed on the ramp structure. The rotation of the lifting winch allows the lifting cable to be coiled or released, enabling the boat to move along the ramp structure, thus achieving boat recovery or recovery. After the boat has moved, the launching winch is rotated to coil the launching cable, returning the ramp structure to its coiled state. This boat launching and retrieving device eliminates the need for recesses on the deck or a dock at the stern, saving space and expanding the effective usable area of ​​the deck. The ramp structure avoids the influence of the boat's shape and draft on launching and retrieving. Furthermore, different numbers of ramp components can be installed according to the boat's freeboard to change the length and slope of the ramp structure, making it highly practical, simple to design, and safe and reliable. Attached Figure Description

[0025] Figure 1 This is a first side view of the boat launching and retrieving device provided by the present invention in its deployed state;

[0026] Figure 2 This is a second side view of the boat launching and retracting device provided by the present invention in its deployed state;

[0027] Figure 3 This is a top view of the boat launching and retracting device provided by the present invention in its deployed state.

[0028] Figure 4 This is a schematic diagram of the boat launching and retracting device provided by the present invention in its retracted state;

[0029] Figure 5 yes Figure 1 Enlarged view of point B in the middle;

[0030] Figure 6 yes Figure 3 Enlarged view at point C;

[0031] Figure 7 yes Figure 2 Cross-sectional view at point AA;

[0032] Figure 8 This is a schematic diagram of a first embodiment of the ship provided by the present invention;

[0033] Figure 9 This is a schematic diagram of a second embodiment of the ship provided by the present invention.

[0034] In the picture:

[0035] 100. Ramp assembly; 110. Longitudinal beam; 120. Crossbeam; 130. Roller; 140. Support structure; 150. Sleeve;

[0036] 200. Retracting / unwinding mechanism; 210. Retracting / unwinding winch; 220. Retracting / unwinding cable; 221. Lifting section; 222. Winding section; 223. Fixing section; 230. Connector;

[0037] 300. Lifting mechanism; 310. Lifting winch; 320. Lifting cable; 330. Guide cable;

[0038] 400. Hull; 410. Bevel; 420. Pad. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0040] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0043] like Figures 1 to 7 As shown, the boat launching and recovering device of this embodiment includes a ramp assembly 100, a launching and recovering mechanism 200, and a lifting mechanism 300. Multiple ramp assemblies 100 are provided, and these multiple ramp assemblies 100 are rotatably connected in sequence to form a ramp structure. The top of the ramp structure is fixed to the vessel. The ramp structure includes a rolled-up state and an extended state. When in the rolled-up state, the ramp structure is rolled up onto the vessel. When in the extended state, the bottom of the ramp structure extends into the water, allowing the ramp structure to be placed on the vessel in the rolled-up state when the boat does not need to be recovered or released. When the boat needs to be recovered or released, the boat can be raised or lowered on the extended ramp structure.

[0044] The retrieval and deployment mechanism 200 includes a retrieval and deployment winch 210 and a retrieval and deployment cable 220. The retrieval and deployment winch 210 is fixed to the vessel, and one end of the retrieval and deployment cable 220 is wound around the retrieval and deployment winch 210, while the other end is connected to the bottom of the ramp structure. When it is necessary to retrieve or release the vessel, the rotation of the retrieval and deployment winch 210 first causes the retrieval and deployment cable 220 to be released, allowing the bottom of the ramp structure to extend into the water. At this time, the ramp structure changes from a wound state to an extended state. After the vessel has moved, the rotation of the retrieval and deployment winch 210 rewinds the retrieval and deployment cable 220, causing the ramp structure to return to a wound state.

[0045] The lifting mechanism 300 includes a lifting winch 310 and a lifting cable 320. The lifting winch 310 is fixed to the vessel, and one end of the lifting cable 320 is wound around the lifting winch 310, while the other end is used to connect to the vessel to be retrieved or released. During the retrieval or release of the vessel, the ramp structure is in the deployed state. The end of the lifting cable 320 is connected to the vessel to be retrieved or released, and the vessel is placed on the ramp structure. The rotation of the lifting winch 310 causes the lifting cable 320 to be wound or released, thereby allowing the vessel to move on the ramp structure, achieving the retrieval or release of the vessel.

[0046] This boat launching and retrieving device eliminates the need for recesses on the ship's deck or a dock at the stern, saving space and increasing the effective usable area of ​​the deck. The ramp structure avoids the influence of the ship's shape and draft on launching and retrieving the boat. Furthermore, different numbers of ramp components can be installed according to the ship's freeboard to change the length and slope of the ramp structure. It is highly practical, simple to design, and safe and reliable.

[0047] Reference Figures 1 to 3 As shown, the ramp assembly 100 includes a crossbeam 120 and multiple longitudinal beams 110. The longitudinal beams 110 extend along the ramp structure direction, and the multiple longitudinal beams 110 are parallel to each other and spaced apart. The crossbeam 120 connects between two adjacent longitudinal beams 110. The multiple longitudinal beams 110 of adjacent ramp assemblies 100 correspond one-to-one and are rotatably connected. Optionally, two adjacent ramp assemblies 100 are hinged together by a hinge structure, which is simple in structure, low in cost, and easy to operate.

[0048] In this embodiment, each ramp component 100 includes two longitudinal beams 110, and three crossbeams 120 connect the two longitudinal beams 110. This ensures the connection strength of the ramp structure while saving production costs. In some other embodiments, the ramp component 100 may also have three or four longitudinal beams 110, and two or four crossbeams 120 may connect adjacent longitudinal beams 110, which can increase the strength of the ramp structure. Further details are omitted here.

[0049] Optionally, the ramp assembly 100 further includes rollers 130, which are fitted onto the crossbeam 120 and rotate around it. When a boat moves on the ramp structure, the boat contacts the rollers 130, causing the rollers 130 to rotate around the crossbeam 120, reducing the frictional resistance between the boat and the ramp structure and minimizing wear on both the boat and the crossbeam 120. In this embodiment, the rollers 130 can be rubber rollers, which can act as a buffer between the crossbeam 120 and the boat, reducing the impact of the boat on the ramp structure and further improving the service life of the ramp structure.

[0050] Preferably, the diameter of the rubber rollers on the ramp component 100 located at the bottom of the ramp structure can be appropriately increased. This arrangement can improve the buoyancy at the bottom of the ramp structure, enabling a smooth docking of the boat and the ramp structure. Of course, floating components such as airbags or floats can also be added to the bottom of the ramp structure to achieve the same effect, which will not be elaborated here.

[0051] Continue to refer to Figures 1 to 4 As shown, the ramp assembly 100 also includes a support structure 140, which is connected to the longitudinal beam 110. When the ramp structure is in the retracted state, the support structures 140 of two adjacent ramp assemblies 100 abut against each other, and the support structures 140 located at the bottom and top of the ramp structure abut against each other, which can prevent the problem of collision between boats due to accidental movement caused by ship movement and wave environment.

[0052] In this embodiment, the ramp assembly 100 includes two support structures 140, each connected to a longitudinal beam 110. The support structures 140 and the longitudinal beam 110 form a trapezoidal frame structure. When the ramp structure is in a rolled-up state, it forms a regular polygonal structure, making the structure compact during roll-up. This helps maintain the stability of the vessel's launching and retracting device during roll-up and also improves the aesthetics of the appearance. It is understood that by setting the ramp structure as a regular polygonal structure, the appropriate circumscribed circle radius can be designed according to the ship's freeboard height, allowing for quick determination of the dimensions of the regular polygonal structure and facilitating the design of the ramp structure.

[0053] For example, in this embodiment, the boat launching and retracting device is provided with six ramp components 100, which form a regular hexagonal structure when in the retracted state. In some other embodiments, the number of ramp components 100 may also be four, five, eight, etc., which will not be elaborated here.

[0054] Optionally, the boat launching and retrieving device includes two launching and retrieving mechanisms 200, which are respectively connected to both sides of the ramp structure. Specifically, the ramp assembly 100 at the top is fixed to the boat, the launching and retrieving winches 210 of the two launching and retrieving mechanisms 200 are respectively fixed to the support structure 140 of the top ramp assembly 100, and the launching and retrieving cables 220 are connected to the support structure 140 at the bottom of the ramp structure, thereby ensuring the stable operation of the launching and retrieving mechanisms 200.

[0055] Furthermore, referring to Figure 5 and Figure 6As shown, the retraction mechanism 200 also includes multiple connectors 230, and the ramp assembly 100 also includes at least two sleeves 150. Two of the at least two sleeves 150 are respectively disposed at the top and bottom of the ramp assembly 100 and extend along the ramp structure direction. When the ramp structure is in the unfolded state, one connector 230 is inserted into the sleeves 150 disposed at the bottom and top of two adjacent ramp assemblies 100 respectively. That is, when the connector 230 is inserted into the sleeve 150, it can prevent the hinge structure from rotating, thereby locking the two adjacent ramp assemblies 100 and preventing the ramp structure from deforming after bearing the load.

[0056] In this embodiment, two sleeves 150 are respectively connected to both ends of the longitudinal beam 110. The sleeves 150 on the two rotatably connected longitudinal beams 110 are correspondingly arranged, which reduces the length of the connector 230, improves the connection strength of the connector, and saves production costs. Optionally, continue to refer to Figure 6 As shown, sleeves 150 are provided on both sides of the longitudinal beam 110, that is, plug-in parts 230 can be provided on both sides of the hinge structure to further improve the load-bearing capacity of the ramp structure.

[0057] Furthermore, continue to refer to Figure 1 and Figure 5 As shown, the take-up and release cable 220 is configured as a ring cable, including a lifting part 221, a winding part 222 and a fixing part 223. The lifting part 221 is connected to the bottom of the ramp structure, the winding part 222 is wound around the take-up and release winch 210, the fixing part 223 is passed through all the sleeves 150, and multiple plug-in parts 230 are spaced apart and connected to the fixing part 223. The take-up and release cable 220 drives the plug-in parts 230 to move relative to the ramp structure when the ramp structure is taken up and released.

[0058] During the deployment of the ramp structure, the cable 220 is gradually released, causing the ramp structure to gradually descend. When the cable 220 is completely released, the ramp structure reaches its maximum height. Figure 1 In the deployed state, the retrieval winch 210 continues to pull the retrieval cable 220, causing multiple connectors 230 to move relative to the ramp structure simultaneously. Each connector 230 can be inserted into the sleeve 150, locking the ramp structure. After the boat's deployment and retrieval are completed, the retrieval winch 210 is activated, causing multiple connectors 230 to simultaneously disengage from the sleeve 150, further tensioning the retrieval cable 220, allowing the ramp structure to gradually wind up. Figure 3 The ramp structure is wound up, completing the winding process.

[0059] Furthermore, the lifting mechanism 300 also includes a guide cable 330, the two ends of which are slidably connected to two retractable cables 220. The lifting cable 320 is connected to the guide cable 330, so that the boat can maintain balance when moving on the ramp structure and prevent the boat from scraping against the support structure 140.

[0060] like Figure 8 and Figure 9 As shown, this embodiment also provides a vessel, including a hull 400 and a plurality of the above-mentioned boat launching and retracting devices. The boat launching and retracting devices are fixed to the stern of the hull 400, or the boat launching and retracting devices are disposed on the side of the hull 400, or the boat launching and retracting devices can be fixed to both the stern of the hull 400 and disposed on the side of the hull 400.

[0061] Specifically, one, two, or three boat launching and retrieving devices can be installed at the stern of the hull 400, which can be adjusted according to the width of the hull 400 and the width of the boat launching and retrieving devices. In some embodiments, multiple boat launching and retrieving devices on the side of the hull 400 can be arranged at an angle to the forward direction of the hull 400, and the multiple boat launching and retrieving devices are parallel to each other and spaced apart to avoid collisions when releasing multiple boats at the same time; in some other embodiments, the center lines of multiple boat launching and retrieving devices converge at a point on the side of the hull 400, thereby realizing multi-channel boat launching and retrieving. Compared with traditional slipway structures and semi-submersible vessels, the structure is simple, launching and retrieving is convenient, and it is easy to control the launching and retrieving of boats in a cluster, thus improving work efficiency.

[0062] Furthermore, the hull 400 is provided with several bevels 410, each corresponding to a boat launching and retracting device. The inclination angle of the bevels 410 is the same as the inclination angle of the ramp structure in the deployed state. When the ramp structure is in the deployed state, the bevels 410 support the ramp structure from below, ensuring the stability of the ramp structure. During the boat's raising process, the bevels 410 can prevent the ramp structure from rotating, ensuring the stability of the boat launching and retracting.

[0063] Optionally, the hull 400 is also provided with a pad 420, which can be supported between the bottom surface of the ramp 410 and the ramp structure, providing space for the ramp structure to adjust its state.

[0064] When a vessel needs to launch or retrieve boats, the following steps are included in this embodiment:

[0065] First, after placing the pad block 420 above the bottom surface of the ramp 410, gradually release the pull cable 220 to allow the ramp structure to gradually unfold. The ramp structure is fully extended when the pull cable 220 is completely released. Figure 1 In the unfolded state, that is, the ramp structure is in a straight state, the winch 210 is used to pull the cable 220, so that the connector 230 moves and inserts into the sleeve 150, locking the ramp structure.

[0066] Next, connect the lifting cable 320 to the guide cable 330, and attach the guide cable 330 to the take-up cable 220. Use the take-up winch 210 to lift the take-up cable 220, remove the pad block 420, and then gradually release the take-up cable 220, allowing the ramp structure to gradually descend to the water surface. During this process, the lifting cable 320 and the guide cable 330 also gradually slide down to the water surface until they reach the desired depth. Figure 2 This state ensures the stability of the deployment and take-up device and facilitates docking.

[0067] Once the vessel is connected to the lifting cable 320, the lifting winch 310 can be activated, allowing the vessel to gradually rise under the action of the lifting cable 320. The vessel can slide on the ramp structure. When the vessel is raised to the deck, it is transferred to the deck storage tray, and the lifting cable 320 is released, allowing it to slide freely to the water surface for a second lifting operation until all lifting requirements are met. During the vessel release process, the ramp structure is in the deployed state. The vessel is transported to the ramp structure, and under the influence of gravity, it slides freely down the ramp structure to the water surface, thus completing the vessel release process.

[0068] For the ramp structure winding process: After completing the boat winding and unwinding work, the lifting cable 320 is retracted, the guide cable 330 is removed, the winding winch 210 is started, multiple connectors 230 simultaneously withdraw from the sleeve 150, and the winding cable 220 is gradually tensioned, causing the ramp structure to gradually wind up and retract until it is fully retracted. Figure 4 The ramp structure is locked in its winding state, and the winch 210 is engaged to complete the winding process of the ramp structure.

[0069] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A boat launching and retrieving device, characterized in that, include: Multiple ramp components (100) are rotatably connected in sequence to form a ramp structure. The top of the ramp structure is fixed to the ship. The ramp structure includes a rolled-up state and an unfolded state. When in the rolled-up state, the ramp structure is rolled up on the ship. When in the unfolded state, the bottom of the ramp structure extends into the water. The take-up and release mechanism (200) includes a take-up and release winch (210) and a take-up and release cable (220). The take-up and release winch (210) is fixed to the vessel, and one end of the take-up and release cable (220) is wound around the take-up and release winch (210), and the other end is connected to the bottom of the ramp structure. The lifting mechanism (300) includes a lifting winch (310) and a lifting cable (320). The lifting winch (310) is fixed to the vessel. One end of the lifting cable (320) is wound around the lifting winch (310), and the other end is used to connect to the boat to be retrieved or launched. The retraction mechanism (200) further includes multiple connectors (230), and the ramp assembly (100) further includes at least two sleeves (150), wherein the two sleeves (150) are respectively disposed at the top and bottom of the ramp assembly (100) and extend along the ramp structure direction. When the ramp structure is in the unfolded state, the retraction winch (210) is used to pull the retraction cable (220) so that the connectors (230) are inserted into the sleeves (150) disposed at the bottom and top of two adjacent ramp assemblies (100).

2. The boat launching and retrieving device according to claim 1, characterized in that, The ramp assembly (100) includes a crossbeam (120) and a plurality of longitudinal beams (110). The longitudinal beams (110) extend along the direction of the ramp structure. The plurality of longitudinal beams (110) are parallel to each other and spaced apart. The crossbeam (120) is connected between two adjacent longitudinal beams (110). The plurality of longitudinal beams (110) of adjacent ramp assemblies (100) correspond one-to-one and are rotatably connected.

3. The boat launching and retrieving device according to claim 2, characterized in that, The ramp assembly (100) also includes a roller (130) which is fitted onto the crossbeam (120) and rotates around the crossbeam (120).

4. The boat launching and retrieving device according to claim 2, characterized in that, The ramp assembly (100) also includes a support structure (140) connected to the longitudinal beam (110). When the ramp structure is in a rolled-up state, the support structures (140) of two adjacent ramp assemblies (100) abut against each other, and the support structures (140) located at the bottom and top of the ramp structure abut against each other.

5. The boat launching and retrieving device according to claim 1, characterized in that, The boat launching and retrieving device includes two launching and retrieving mechanisms (200), which are respectively connected to both sides of the ramp structure.

6. The boat launching and retrieving device according to claim 5, characterized in that, The lifting mechanism (300) also includes a guide cable (330), the two ends of which are slidably connected to the two retracting cables (220), and the lifting cable (320) is connected to the guide cable (330).

7. The boat launching and retrieving device according to claim 1, characterized in that, The retractable cable (220) is configured as a ring cable, including a lifting part (221), a winding part (222) and a fixing part (223). The lifting part (221) is connected to the bottom of the ramp structure. The winding part (222) is wound around the retractable winch (210). The fixing part (223) is passed through all the sleeves (150). A plurality of plugs (230) are spaced apart and connected to the fixing part (223). The retractable cable (220) drives the plugs (230) to move relative to the ramp structure when the ramp structure is retracted or extended.

8. A ship, characterized in that, It includes a hull (400) and several boat launching and retracting devices as described in any one of claims 1-7, the boat launching and retracting devices being fixed to the stern of the hull (400); And / or, the boat launching and retraction device is located on the side of the hull (400).

9. The ship according to claim 8, characterized in that, The hull (400) is provided with a number of bevels (410), each bevel (410) corresponding to a boat launching and retracting device. When the ramp structure is in the deployed state, the bevels (410) are supported under the ramp structure.

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