A marine heave winch for leading a cable from an aft end

Abstract

The utility model discloses a kind of ocean take-up winch from rear end cable guiding, fixedly installed with main drum assembly on winch frame, the output end of the main drum assembly is sequentially through cable arrangement mechanism and crane arm mechanism again and is fixedly connected with hoisting storage mechanism, the hoisting storage mechanism can be suspended to the winch frame both sides;The main drum assembly is used for taking up signal cable;The crane arm mechanism is used for real-time suspension adjustment the position of the hoisting storage mechanism;The cable arrangement mechanism is fixed in the front end of the main drum assembly in the winch frame, and the cable arrangement mechanism is used for adjusting the output length and direction of signal cable.The utility model can realize that ocean take-up winch is installed in each direction of ship, not limited to the size and position of ship body additional space, can effectively avoid that wet end distance ship side is too close, avoid collision ship body risk, crane arm mechanism can be multi-direction hoisting along circumference.

Description

Technical Field

[0001] This utility model relates to the field of marine winch technology, specifically to a marine winch with a cable-guided cable from the rear end. Background Technology

[0002] Most existing marine winches adopt a crane structure, using hydraulic cylinders to propel the wet end to the sea surface. This method places certain requirements on the installation location of the marine winch and the shape of the stern of the ship. It also limits the overall length, structural size, and strength of the boom. To ensure that the cable laying mechanism and the hydraulic cylinder do not interfere with each other, the overall size of the winch is generally large. The hydraulic cylinder propulsion method has a simple action and is prone to causing the wet end to collide with the ship. The winch is also generally installed at the stern, which requires a lot of installation space. The longer the boom extends, the greater the tilt angle, and the higher the strength requirement of the boom. The larger the boom and the larger and heavier the cylinder, the greater the overall space required for the winch. In addition, hydraulic winches are expensive, noisy, and troublesome to use and maintain. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a marine winch with a rear-end cable guide, comprising a winch frame, a main drum assembly, a boom mechanism, a hoisting and storage mechanism, and a cable laying mechanism. The main drum assembly is fixedly mounted on the winch frame. The output end of the main drum assembly is sequentially connected to the hoisting and storage mechanism via the cable laying mechanism and the boom mechanism. The hoisting and storage mechanism can be suspended to both sides of the winch frame. The main drum assembly is used for launching and retrieving signal cables. The boom mechanism is used for real-time suspension and adjustment of the position of the hoisting and storage mechanism. The cable laying mechanism is fixed to the front end of the main drum assembly within the winch frame and is used to adjust the output length and direction of the signal cable.

[0004] Preferably, the boom mechanism includes a rotary motor, a rotary support mechanism, a three-stage combined boom, a boom transmission assembly, and a cable limiting assembly. The rotary motor is fixedly mounted on the top of the winch frame, and the output end of the rotary motor is drivenly connected to the rotary support mechanism. The rotary support mechanism is rotatably connected to the winch frame. The rotary support mechanism is equipped with a three-stage combined boom that can rotate relative to the winch frame. The lower side of the three-stage combined boom is drivenly connected to the output end of the boom transmission assembly, and the bottom of the boom transmission assembly is fixedly mounted on the rotary support mechanism. A cable limiting assembly is provided on the outer side of the three-stage combined boom, and the front end of the cable limiting assembly is connected to the hoisting and storage mechanism via a signal cable.

[0005] Preferably, the main drum assembly includes a main motor, a transmission gear set, and a cable-laying drum. The main motor is fixedly mounted on one side of the winch frame. The output end of the main motor is adapted to and connected to the transmission gear set. The output end of the transmission gear set is driven to the drive shaft of the cable-laying drum. A cable-laying mechanism is provided at intervals in front of the cable-laying drum. The height of the cable-laying mechanism is not higher than half the diameter of the cable-laying drum.

[0006] Preferably, the three-stage combined boom includes a primary boom, a secondary boom, and a tertiary boom. The primary boom is rotatably mounted on the slewing support mechanism. The secondary boom is nested inside the primary boom, and the tertiary boom is nested inside the secondary boom. A reduction motor passes through the rear end of the primary boom, and the output end of the reduction motor is connected to a transmission screw. The transmission screw is located inside the tertiary boom and is equipped with a wire rope assembly. The front end of the primary boom is equipped with a primary boom front pulley, the front end of the secondary boom is equipped with a secondary boom front pulley, and the inner side of the front end of the tertiary boom is equipped with a fixing block. The fixing block, the secondary boom front pulley, and the primary boom front pulley are connected by the wire rope assembly.

[0007] Preferably, the boom transmission assembly includes a boom electric cylinder, a guide rod, and limit switches. The boom electric cylinder is fixedly installed on the slewing support mechanism, and the output end of the boom electric cylinder is hinged to the lower side of the first-stage boom through a connector. A guide rod is fixedly installed on the boom electric cylinder, and two limit switches are installed at intervals on the guide rod.

[0008] Preferably, the slewing support mechanism includes a slewing support assembly, a slewing mounting base, and a slewing limiting pulley. The winch frame is provided with the slewing support assembly, the lower inner side of the slewing support assembly is provided with a slewing limiting pulley, the upper end of the slewing support assembly is provided with a slewing mounting base, and the upper end of the slewing mounting base is rotatably connected to the lower end of the primary boom via a rotating shaft.

[0009] Preferably, the cable limiting assembly includes a first guide pulley, a second guide pulley, a rear guide wheel assembly, a guide frame, a front guide wheel assembly, a front limiting wheel, and a cable guide roller. The first guide pulley is provided inside the rotary mounting base, the second guide pulley is provided at the protrusion of the first-stage boom, the rear guide wheel assembly is fixedly provided at the top of the first-stage boom, the front end of the third-stage boom is provided with a guide frame, the front guide wheel assembly is rotatably provided inside the guide frame, two sets of front limiting wheels are arranged side by side at the front end of the guide frame, and two sets of cable guide rollers are arranged side by side at intervals on the outer side of the front limiting wheels. The cable guide rollers are separated from the front guide wheel assembly.

[0010] Preferably, the lower front end of the three-stage boom is provided with three-stage boom rear pulleys at intervals.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention has a main drum assembly fixedly installed on the winch frame. The output end of the main drum assembly is connected to the hoisting and storage mechanism in sequence through a cable laying mechanism and a boom mechanism. The hoisting and storage mechanism can be suspended to both sides of the winch frame. The main drum assembly is used to lay and wind up the signal cable. The boom mechanism is used to suspend and adjust the position of the hoisting and storage mechanism in real time. The cable laying mechanism is fixed at the front end of the main drum assembly in the winch frame. The cable laying mechanism is used to adjust the output length and direction of the signal cable. This utility model enables the installation of marine recovery winches in all directions around the ship, without being limited by the size and location of the installation space on the hull. It can effectively avoid the wet end being too close to the ship's side, thus avoiding the risk of collision with the ship's hull. The boom mechanism can perform multi-directional lifting along the circumference. This utility model is electrically driven as a whole, with low noise, low cost, and simple operation. The modular design makes disassembly and assembly convenient, safe, and reliable, and makes subsequent maintenance simpler and faster. The cable exits from the rear end of the marine recovery winch, reducing the overall size of the marine recovery winch and ensuring neat cable arrangement. The overall lightweight and miniaturized design makes it more adaptable to different installations. Furthermore, the roller assembly of this invention is positioned opposite to the boom mechanism, allowing the winch to lay the signal cable from rear to front when laying it. This increases the cable laying angle and effectively avoids the risk of rubbing between the boom mechanism and the signal cable, improving cable neatness and operational safety. It also avoids the problem in the prior art where front-end cable exiting can lead to limited angle between the cable and the cable laying mechanism, further optimizing the cable running path and effectively solving the problem of interference that easily occurs when the angle between the cable laying mechanism and the signal cable is large.

[0012] (2) The rear pulley of the three-stage boom and the front guide wheel assembly of this utility model form a cable guiding structure. If the signal cable vibrates during the winding and unwinding process, it can effectively prevent the signal cable from hitting the three-stage boom directly and affecting the operation of the entire winding and unwinding winch. At the same time, the cable guide roller and the front limit wheel work together to constrain the lateral deviation of the signal cable and ensure that it enters the cable laying mechanism smoothly. The front guide wheel assembly in the guide frame automatically adjusts with the cable tension and forms multi-point support with the rear guide wheel assembly to further suppress vibration. When the boom electric cylinder pushes the first-stage boom to pitch, the guide rod and limit switch monitor the stroke in real time to prevent over-extension and damage to the structure and ensure the safe operation of the system. The wire rope assembly achieves precise winding and unwinding under the drive of the transmission screw and effectively shares the load stress with the pulley system of each stage. The coordinated tensioning mechanism between the fixed block and the front and rear pulleys ensures that the cable is always on the ideal trajectory when the three-stage boom is extended and retracted. The geared motor works smoothly and, combined with the high-precision rotation of the slewing support assembly, makes the entire winding and unwinding process dynamically balanced. The distance between the front limit wheel and the cable guide roller is precisely calculated to accommodate cables of different diameters and eliminate the risk of cable slippage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the three-stage combined boom of this utility model when it is extended.

[0014] Figure 2 This is a schematic diagram of the overall structure of the three-stage combined boom of this utility model when it is retracted.

[0015] Figure 3 For the present utility model Figure 2 A sectional view.

[0016] Figure 4 This is a partial exploded view of the present invention.

[0017] Figure 5 This is a schematic diagram of the structure of the electric cylinder for retracting the boom of this utility model.

[0018] Figure 6 This is a schematic diagram of part of the structure of this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 6 As shown, a marine winch with a rear-end cable guide includes a winch frame 1, a main drum assembly 2, a boom mechanism 3, a hoisting and storage mechanism 4, a cable laying mechanism 5, a signal cable 6, a rotary motor 7, a main motor 8, a transmission gear set 9, a cable laying drum 10, a primary boom 11, a secondary boom 12, a tertiary boom 13, a geared motor 14, a transmission screw 15, a wire rope assembly 16, a fixing block 17, a boom electric cylinder 18, a guide rod 19, a limit switch 20, a slewing support assembly 21, a slewing mounting base 22, a slewing limit pulley 23, a rotating shaft 24, a first guide pulley 25, a second guide pulley 26, a rear guide wheel assembly 27, a guide frame 28, a front guide wheel assembly 29, a front limit wheel 30, a cable laying stop roller 31, a tertiary boom rear pulley 32, a primary boom front pulley 33, and a tertiary boom front pulley 34.

[0021] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1 to 6 As shown, a main drum assembly 2 is fixedly installed on the winch frame 1. The output end of the main drum assembly 2 is connected to the hoisting and storage mechanism 4 in sequence through the cable laying mechanism 5 and the boom mechanism 3. The hoisting and storage mechanism 4 can be suspended on both sides of the winch frame 1. The front end of the signal cable 6 is detachably connected to the hoisting and storage mechanism 4. The hoisting and storage mechanism 4 can be suspended on both sides of the winch frame 1. This enhances the self-weight stability of the winch frame 1 and facilitates the replacement of the hoisting and storage mechanism 4.

[0024] The winch frame 1 is fixed to the hull by threaded fastening. Threaded weld blocks can be added to the hull surface to connect with the winch frame 1. The main drum assembly 2 is fixed to the mounting plates on both sides of the winch frame 1 assembly. One end of the drive shaft of the cable-laying drum 10 is connected to the main motor 8 through the transmission gear set 9. The driven shaft of the cable-laying drum 10 is a hollow shaft. The signal cable enters from the large end of the hollow shaft near the drum end and extends from the small end of the hollow shaft. The extended end is connected to the online transmission device inside the main drum assembly 2 to provide signal output. The signal cable 6 is wound around the cable-laying drum 10. The other end of the signal cable 6 is wound around the cable-laying drum 10 and extends out, passing sequentially through the cable-laying mechanism 5, the slewing support assembly 21, and the slewing mounting seat 22, extending out from the outside of the first-stage boom 11, and being transmitted along the first guide pulley 25 and the second guide pulley 26 on the outside of the first-stage boom 11 to the cable-laying guide roller 31.

[0025] The main roller assembly 2 is used for winding and unwinding the signal cable 6; the boom mechanism 3 is used for real-time suspension and adjustment of the position of the hoisting and storage mechanism 4; the cable laying mechanism 5 is fixed to the front end of the main roller assembly 2 inside the winch frame 1, and is used to adjust the output length and direction of the signal cable 6. The cable laying mechanism 5 of this utility model is a common cable laying mechanism 5 on the market, and this utility model has not made any improvements, so its structure and principle are not described in detail.

[0026] The signal cable 6 originates from the cable tray 10, passes through the initial complete stop of the cable tray mechanism 5, is stopped behind by the first guide pulley 25 of the slewing mounting base 22, is stopped in front by the second guide pulley 26 of the first-stage boom 11, and is fixed in the center by the rear guide wheel assembly 27 and the front guide wheel assembly 29, extending out from the middle of the cable tray stop roller 31. The front end of the signal cable 6 connects to the hoisting and storage device, which tightens the signal cable 6. This ensures that the signal cable 6 remains taut during dynamic deployment and retraction, preventing loosening or tangling. A third-stage boom rear pulley 32 is installed at the end of the third-stage boom 13, working in conjunction with the front guide wheel assembly 29 to provide multi-stage guidance, allowing the signal cable 6 to extend smoothly to the work terminal. The slewing motor 7 drives the slewing support assembly 21, causing the entire boom system to rotate horizontally. The rotation angle is limited by the slewing limit pulley 23 to prevent excessive twisting and damage to the cable. The coordinated operation of all moving parts enables precise deployment and retrieval of signal cable 6, ensuring transmission stability and operational safety even in complex sea conditions.

[0027] The boom mechanism 3 includes a rotary motor 7, a rotary support mechanism, a three-stage combined boom, a boom transmission assembly, and a cable limiting assembly. The rotary motor 7 is fixedly mounted on the top of the winch frame 1. The output end of the rotary motor 7 is connected to the rotary support mechanism. The rotary support mechanism is rotatably connected to the winch frame 1. The rotary support mechanism is equipped with a three-stage combined boom that can rotate relative to each other. The lower side of the three-stage combined boom is connected to the output end of the boom transmission assembly. The bottom of the boom transmission assembly is fixedly mounted on the rotary support mechanism. A cable limiting assembly is provided on the outer side of the three-stage combined boom. The front end of the cable limiting assembly is connected to the hoisting and storage mechanism 4 through a signal cable 6.

[0028] Specifically, the three-stage combined boom includes a primary boom 11, a secondary boom 12, and a tertiary boom 13. The primary boom 11 is rotatably mounted on a slewing support mechanism. The secondary boom 12 is housed inside the primary boom 11, and the tertiary boom 13 is housed inside the secondary boom 12. A reduction motor 14 passes through the rear end of the primary boom 11. The output end of the reduction motor 14 is connected to a transmission screw 15, which is located inside the tertiary boom 13. A wire rope assembly 16 is mounted on the transmission screw 15. The front end of the primary boom 11 is provided with a primary boom front pulley 33, the front end of the secondary boom 12 is provided with a secondary boom front pulley 34, and the inner side of the front end of the tertiary boom 13 is provided with a fixing block 17. The fixing block 17, the secondary boom front pulley 34, and the primary boom front pulley 33 are connected by the wire rope assembly 16.

[0029] The wire rope assembly 16 works in conjunction with the transmission screw 15 to achieve smooth telescopic movement of the three-stage combined boom. One end of the assembly is fixed to the fixed block 17 inside the third-stage boom 13, and the other end is anchored to the tail of the first-stage boom 11 after passing through the second-stage boom front pulley 34 and the first-stage boom front pulley 33, ensuring that the booms at each stage are subjected to uniform force and move synchronously during telescopic movement.

[0030] The lower front end of the three-stage boom 13 is provided with rear pulleys 32. These rear pulleys 32, together with the front guide wheel assembly 29, form a cable guiding structure. If the signal cable 6 vibrates during deployment or retraction, it effectively prevents the signal cable 6 from directly hitting the three-stage boom and affecting the operation of the entire winch. Simultaneously, the cable guide roller 31 and the front limit wheel 30 work together to restrain lateral cable deviation, ensuring its smooth entry into the cable deployment mechanism 5. The front guide wheel assembly 29 within the guide frame 28 automatically adjusts with cable tension, forming multi-point support with the rear guide wheel assembly 27, further suppressing vibration.

[0031] The main drum assembly 2 includes a main motor 8, a transmission gear set 9, and a cable laying drum 10. The main motor 8 is fixed on one side of the winch frame 1. The output end of the main motor 8 is adapted to and connected to the transmission gear set 9. The output end of the transmission gear set 9 is connected to the drive shaft of the cable laying drum 10. A cable laying mechanism 5 is provided at intervals in front of the cable laying drum 10. The height of the cable laying mechanism 5 is not higher than half the diameter of the cable laying drum 10, which saves installation space and achieves the best cable laying effect.

[0032] The boom drive assembly includes a boom electric cylinder 18, a guide rod 19, and limit switches 20. The boom electric cylinder 18 is fixedly mounted on the slewing support mechanism, and its output end is hinged to the lower side of the primary boom 11 via a connector. The guide rod 19 is fixedly mounted on the boom electric cylinder 18, and two limit switches 20 are installed at intervals on the guide rod 19. The two limit switches 20 are used to sense and limit the maximum stroke and stop position of the boom electric cylinder 18, respectively, to ensure the safe and reliable operation of the primary boom 11 when the elevation angle changes. The guide rod 19 effectively assists the linear motion of the boom electric cylinder 18, reduces off-center load wear, and improves the durability of the mechanism.

[0033] The slewing support mechanism includes a slewing support assembly 21, a slewing mounting base 22, and a slewing limiting pulley 23. The winch frame 1 is provided with the slewing support assembly 21, and the slewing limiting pulley 23 is provided on the inner side of the lower end of the slewing support assembly 21. The slewing limiting pulley 23 facilitates the signal cable 6 to continue moving in the direction of the first guide pulley 25 without rubbing against the internal structure.

[0034] The upper end of the slewing support assembly 21 is provided with a slewing mounting seat 22, and the upper end of the slewing mounting seat 22 is rotatably connected to the lower end of the primary boom 11 via a rotating shaft 24.

[0035] The cable limiting assembly includes a first guide pulley 25, a second guide pulley 26, a rear guide wheel assembly 27, a guide frame 28, a front guide wheel assembly 29, a front limiting wheel 30, and a cable guide roller 31. The first guide pulley 25 is provided inside the slewing mounting base 22. The second guide pulley 26 is provided at the protrusion of the first-stage boom 11. The rear guide wheel assembly 27 is fixedly provided at the top of the first-stage boom 11. The front end of the third-stage boom 13 is provided with a guide frame 28. The front guide wheel assembly 29 is rotatably provided inside the guide frame 28. Two sets of front limiting wheels 30 are arranged side by side at the front end of the guide frame 28. Two sets of cable guide rollers 31 are arranged side by side at intervals on the outer side of the front limiting wheels 30. The cable guide rollers 31 are separated from the front guide wheel assembly 29.

[0036] When the boom electric cylinder 18 pushes the first-stage boom 11 to pitch, the guide rod 19 and limit switch 20 monitor the stroke in real time to prevent over-travel damage to the structure and ensure safe system operation. The wire rope assembly 16, driven by the transmission screw 15, achieves precise winding and unwinding, effectively sharing the load stress in conjunction with the pulley systems at each stage. The coordinated tensioning mechanism between the fixed block 17 and the rear guide wheel assembly 27 and front guide wheel assembly 29 ensures that the cable remains on the ideal trajectory during the extension and retraction of the third-stage boom 13. The geared motor 14 operates smoothly, and combined with the high-precision rotation of the slewing support assembly 21, it ensures dynamic balance throughout the winding and unwinding process. The distance between the front limit wheel 30 and the cable guide roller 31 is precisely calculated to accommodate cables of different diameters and eliminate the risk of cable slippage.

[0037] The boom transmission assembly of this utility model is connected to the first-stage boom 11 and the slewing mounting base 22 at both ends, which effectively avoids the structural defects of the transmission assembly in the prior art that is connected between the first-stage boom 11 and the second-stage boom 12, and improves the transmission stability and connection strength. The cable limiting assembly adopts an adjustable pulley block structure, which can automatically adjust the limiting position according to the tension of the signal cable 6, ensuring that the signal cable 6 maintains a stable posture during the lifting process and preventing shaking and tangling.

[0038] The working process of this utility model is as follows: S1. The slewing support mechanism operates, rotating the three-stage combined boom to the designated position; S2. The main motor 8 operates, and the main drum assembly 2 performs the cable winding action; the cable laying mechanism 5 works in coordination with the main drum assembly 2 to ensure that the signal cable 6 is arranged in an orderly manner during the winding and unwinding process; S3, the boom electric cylinder 18 works, the drive output push rod moves upward to push out the first stage boom 11, and at the same time the cable drum 10 releases the cable, raising the hoisting and storage device above the ship's side height; S4. After the hoisting and storage mechanism 4 is lifted beyond the ship's side height by the cable-laying drum 10 and the three-stage combined boom synchronously laying cables, the main motor 8 starts, and through the work of the reduction motor 14 and the transmission screw 15, the second-stage boom 12 and the third-stage boom 13 are pushed out. At the same time, the cable-laying drum 10 continues to lay cables synchronously, lifting the hoisting and storage device beyond the ship's side position to the sea level. S5, the output end of the boom electric cylinder 18 pulls the first-stage boom 11 back to the initial position, and the cable laying drum 10 continues to lay the cable, so as to lower and lower the hoisting and storage mechanism 4 to the designated position and depth on the seabed.

[0039] This utility model enables the installation of marine recovery winches in all directions around the ship, without being limited by the size and location of the installation space on the hull. It can effectively avoid the wet end being too close to the ship's side, thus avoiding the risk of collision with the ship's hull. The boom mechanism 3 can perform multi-directional lifting along the circumference. This utility model is electrically driven as a whole, with low noise, low cost, and simple operation. The modular design makes disassembly and assembly convenient, safe, and reliable, and makes subsequent maintenance simpler and faster. The cable exits from the rear end of the marine recovery winch, reducing the overall size of the marine recovery winch and ensuring neat cable arrangement. The overall lightweight and miniaturized design makes it more adaptable to different installations.

[0040] The roller assembly 2 of this invention is positioned opposite to the boom mechanism 3, so that the winding winch lays the signal cable 6 from rear to front when winding it up or down. This increases the cable laying angle and effectively avoids the risk of rubbing between the boom mechanism and the signal cable, improving the neatness of the cable laying and operational safety. It also avoids the problem in the prior art where the front-end cable exit easily leads to the limitation of the angle between the cable and the cable laying mechanism, further optimizing the cable running path and effectively solving the problem of interference that easily occurs when the angle between the cable laying mechanism 5 and the signal cable 6 is large.

[0041] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Therefore, any modifications, equivalent changes, or improvements made in accordance with the claims of this utility model shall still fall within the scope of this utility model.

Claims

1. A marine winch for launching and recovering cables from the rear end, characterized in that: The system includes a winch frame (1), a main drum assembly (2), a boom mechanism (3), a hoisting and storage mechanism (4), and a cable laying mechanism (5). The main drum assembly (2) is fixedly installed on the winch frame (1). The output end of the main drum assembly (2) is connected to the hoisting and storage mechanism (4) in sequence through the cable laying mechanism (5) and the boom mechanism (3). The hoisting and storage mechanism (4) can be suspended to both sides of the winch frame (1). The main drum assembly (2) is used to wind up and unwind the signal cable (6). The boom mechanism (3) is used to suspend and adjust the position of the hoisting and storage mechanism (4) in real time. The cable laying mechanism (5) is fixed to the front end of the main drum assembly (2) inside the winch frame (1). The cable laying mechanism (5) is used to adjust the output length and direction of the signal cable (6).

2. The marine winch for launching and recovering cables from the rear end as described in claim 1, characterized in that: The boom mechanism (3) includes a rotary motor (7), a rotary support mechanism, a three-stage combined boom, a boom transmission assembly, and a cable limiting assembly. The top of the winch frame (1) is fixed with the rotary motor (7). The output end of the rotary motor (7) is connected to the rotary support mechanism. The rotary support mechanism is rotatably connected to the winch frame (1). The rotary support mechanism is provided with a three-stage combined boom that can rotate relative to each other. The lower side of the three-stage combined boom is connected to the output end of the boom transmission assembly. The bottom of the boom transmission assembly is fixed on the rotary support mechanism. The outer side of the three-stage combined boom is provided with a cable limiting assembly. The front end of the cable limiting assembly is connected to the hoisting and storage mechanism (4) through a signal cable (6).

3. A marine winch for launching and recovering cables from the rear end, as described in claim 2, is characterized in that: The main drum assembly (2) includes a main motor (8), a transmission gear set (9), and a cable-laying drum (10). The main motor (8) is fixed on one side of the winch frame (1). The output end of the main motor (8) is adapted to the transmission gear set (9). The output end of the transmission gear set (9) is connected to the drive shaft of the cable-laying drum (10). A cable-laying mechanism (5) is provided at intervals in front of the cable-laying drum (10). The height of the cable-laying mechanism (5) is not higher than half the diameter of the cable-laying drum (10).

4. A marine winch for launching and recovering cables from the rear end, as described in claim 3, is characterized in that: The three-stage combined boom includes a primary boom (11), a secondary boom (12), and a tertiary boom (13). The primary boom (11) is rotatably mounted on the slewing support mechanism. The secondary boom (12) is fitted inside the primary boom (11), and the tertiary boom (13) is fitted inside the secondary boom (12). A reduction motor (14) is installed at the rear end of the primary boom (11). The output end of the reduction motor (14) is connected to a transmission screw (15). The lead screw (15) is located inside the third-stage boom (13), and the lead screw (15) is provided with a wire rope assembly (16); the front end of the first-stage boom (11) is provided with a first-stage boom front pulley (33), the front end of the second-stage boom (12) is provided with a second-stage boom front pulley (34), and the inner side of the front end of the third-stage boom (13) is provided with a fixing block (17). The fixing block (17), the second-stage boom front pulley (34) and the first-stage boom front pulley (33) are connected by the wire rope assembly (16).

5. A marine winch for launching and recovering cables from the rear end, as described in claim 4, characterized in that: The boom transmission assembly includes a boom electric cylinder (18), a guide rod (19), and limit switches (20). The boom electric cylinder (18) is fixedly installed on the slewing support mechanism. The output end of the boom electric cylinder is hinged to the lower side of the first-stage boom (11) through a connector. The boom electric cylinder (18) is fixedly provided with a guide rod (19), and two limit switches (20) are installed at intervals on the guide rod (19).

6. A marine winch for launching and recovering cables from the rear end, as described in claim 5, is characterized in that: The slewing support mechanism includes a slewing support assembly (21), a slewing mounting seat (22), and a slewing limiting pulley (23). The winch frame (1) is provided with the slewing support assembly (21). The slewing support assembly (21) is provided with a slewing limiting pulley (23) on the inner side of its lower end. The slewing support assembly (21) is provided with a slewing mounting seat (22) on its upper end. The upper end of the slewing mounting seat (22) is rotatably connected to the lower end of the first-stage boom (11) via a rotating shaft (24).

7. A marine winch for launching and recovering cables from the rear end as described in claim 6, characterized in that: The cable limiting assembly includes a first guide pulley (25), a second guide pulley (26), a rear guide wheel group (27), a guide frame (28), a front guide wheel group (29), a front limiting wheel (30), and a cable guide roller (31). The first guide pulley (25) is provided in the rotary mounting base (22). The second guide pulley (26) is provided at the protrusion of the first-stage boom (11). The rear guide wheel group (27) is fixed at the top of the first-stage boom (11). The front end of the third-stage boom (13) is provided with a guide frame (28). The front guide wheel group (29) is rotatably provided inside the guide frame (28). Two sets of front limiting wheels (30) are arranged side by side at the front end of the guide frame (28). Two sets of cable guide rollers (31) are arranged side by side at intervals on the outside of the front limiting wheels (30). The cable guide rollers (31) are separated from the front guide wheel group (29).

8. A marine winch for launching and recovering cables from the rear end, as described in claim 4, characterized in that: The three-stage boom (13) is provided with three-stage boom rear pulleys (32) at intervals below the front end.

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