Marine gangplank lap joint supporting device

Abstract

The invention discloses a marine gangplank lap joint supporting device. The device comprises a gangplank body, a supporting mechanism, a landing mechanism, a hydraulic system, an electrical system and a turnover system. One side of the springboard main body is a lap joint edge; the supporting mechanism comprises a supporting oil cylinder, and the free end of the supporting oil cylinder is connected with the landing mechanism through a knuckle bearing to achieve spatial rotation of the landing mechanism. The landing mechanism comprises a landing frame with a hinged support frame, a buffer block and two vertical stabilizing oil cylinders, and the stabilizing oil cylinders are hinged to supporting oil cylinders and base plates; the hydraulic system comprises a hydraulic pump station, a valve group and a pipeline and provides power for the oil cylinder; the electrical system comprises a control box for driving and controlling the oil cylinder to act; the turnover system achieves 180-degree turnover of the supporting device through a turnover plate, a guide rail, a swing arm and the like, and is matched with a locking mechanism for fixing, so that the direction of the supporting device can be switched. The device can adapt to different beach terrains, stable loading and unloading are guaranteed, the supporting device can be stored, the bare defect is avoided, and the operation efficiency and practicability of the roll-on-roll-off ship are improved.

Description

Technical Field

[0001] This invention relates to the field of gangplank technology, and more specifically to a gangplank splicing support device for ships. Background Technology

[0002] In the field of roll-on / roll-off (Ro-Ro) shipping, vehicle ramps, as a crucial passage connecting the ship's hull and the shore, are one of the core pieces of equipment for achieving efficient cargo loading and unloading. Existing Ro-Ro ships typically have vehicle ramps installed at the stern of the hold, made of metal, possessing a certain load-bearing capacity and anti-slip design. These ramps, with their sloping structure, allow vehicles to pass between the shore and the ship, playing an irreplaceable role in the Ro-Ro cargo loading and unloading process.

[0003] However, existing vehicle gangway splicing support methods have significant technical limitations. The core issue is that the splicing function of the gangways is highly dependent on fixed structures and fixed working conditions, making it difficult to adapt to diverse shoreline terrain and vessel conditions. From a structural design perspective, existing vehicle gangways are mostly connected to the hull of roll-on / roll-off vessels in a fixed position, and the support structure lacks adjustability. Effective splicing can only be achieved when the vessel is in a preset fixed state (such as when the shoreline height and slope meet standard design values). The root cause of this design flaw is that existing solutions do not fully consider the complexity of shoreline terrain in actual near-shore transportation scenarios. The height and slope differences between different ports and shorelines are significant, and the relative position of the vessel and the shore may shift due to changes in tides and loading conditions during berthing. Fixed-position gangway support structures cannot adaptively adjust to these variables.

[0004] The aforementioned technical deficiencies directly lead to multiple problems in actual operations: when faced with non-standard height differences on the shore or changes in the condition of the vessel, existing vehicle gangways cannot achieve stable connection, resulting in interruption of cargo loading and unloading operations and seriously affecting transportation efficiency; even in some scenarios close to standard operating conditions, forced connection will result in uneven stress on the gangway due to insufficient adaptability of the support structure to the shore, which not only reduces the load-bearing stability of the gangway, but may also exacerbate fatigue wear of the gangway's metal structure and shorten the service life of the equipment; at the same time, the lack of flexible and adaptable support methods also limits the operating range of ro-ro ships, making it impossible to complete cargo transfer on shores with complex terrain, thus reducing the practicality and adaptability of ro-ro ships as a near-shore cargo transportation tool.

[0005] In addition, the existing support device's components such as the hydraulic cylinders and landing frame are an integrated fixed structure with the main body of the gangway, lacking an adjustable position switching mechanism. When the gangway rotates around the hull hinge point and retracts, the support device moves synchronously with the gangway, and is eventually exposed on the outside of the hull due to the lack of storage space.

[0006] For the reasons mentioned above, it is necessary to propose a ship gangway lap support device to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to overcome the defects in the prior art and provide a ship gangway splicing support device.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: A shipboard gangway lap support device includes a gangway body, one side of which is hinged to the hull, and the opposite side forms an lap edge; the support device includes a support mechanism, a landing mechanism, a hydraulic system, and an electrical system; The support mechanism includes a support cylinder, one end of which is fixedly connected to the main body of the ramp. The free end of the support cylinder is provided with a joint bearing. The support cylinder is connected to the landing mechanism through the joint bearing, so that the landing mechanism can rotate in space around the mating point of the joint bearing. The landing mechanism includes a landing frame and a buffer block; the upper surface of the landing frame is provided with a hinge frame, and the bottom of the landing frame is provided with a buffer block; The hydraulic system includes a hydraulic pump station that supplies hydraulic oil to the hydraulic units within the support device; The electrical system includes a motor that drives the hydraulic pump station and controls the hydraulic cylinders to extend and retract as required.

[0009] Furthermore, the landing frame also includes a pad, and the landing mechanism also includes two stabilizing cylinders, the planes of which the two stabilizing cylinders are perpendicular to each other; The free end of the support cylinder is provided with a first hinge seat and a second hinge seat in mutually perpendicular directions. The two hinge seats are respectively hinged to the stabilizing cylinder; the other end of the two stabilizing cylinders is hinged to the pad plate.

[0010] Furthermore, the hinge frame includes two parallel longitudinal ribs, which are triangular in shape. The high point of the two longitudinal ribs is used as the hinge end for the spherical bearing supporting the hydraulic cylinder. The longitudinal ribs are vertically fixed on the pad, and multiple transverse ribs are arranged vertically at intervals on the outer side of the two longitudinal ribs. A connecting and fixing plate is provided between the two longitudinal ribs on the hypotenuse of the triangle.

[0011] Furthermore, the longitudinal ribs, transverse ribs, and connecting fixing plates are provided with a number of weight-reducing holes.

[0012] Furthermore, the hydraulic system also includes hydraulic valve groups and hydraulic pipelines. The hydraulic pump station includes a hydraulic oil tank, a hydraulic pump, and is equipped with a cooler, a control air filter, and a filter. The hydraulic valve group includes several control valve groups. The support cylinder and the stabilizing cylinder are connected to the hydraulic pump station through hydraulic pipelines, and control valve groups are installed on the hydraulic pipelines.

[0013] Furthermore, the electrical system includes the pump station control box and the valve group control box.

[0014] Furthermore, a flipping system is provided on the main body of the springboard, and the support device is provided on the flipping system, so that the support device can be flipped and controlled to face the two sides of the main body of the springboard; the flipping system includes a flipping plate and a locking mechanism, and the flipping plate is fixed by the locking mechanism after rotating 180° and falling back into its original position.

[0015] Furthermore, the flipping system includes a guide rail, a slider, a swing arm, and a linear drive mechanism; the flipping plate has a flipping shaft in the middle, and a sliding shaft is provided on one side of the flipping plate and parallel to the flipping shaft, with the end of the sliding shaft rotatably disposed within the slider; the guide rail is disposed on the main body of the flipping plate, the slider is slidably disposed within the guide rail, the first end of the swing arm is hinged to one end of the guide rail, the second end of the swing arm is hinged to the flipping shaft, and the linear drive mechanism drives the slider to slide within the guide rail to provide power for flipping the flipping plate.

[0016] Furthermore, the main body of the ramp is provided with a rotary drive mechanism for driving the swing arm to swing. The rotary drive mechanism includes a rotary hydraulic cylinder. The output end of the rotary hydraulic cylinder is connected to the first end of the swing arm and controls the swing arm to reciprocate within its rotation range with the first end as the axis.

[0017] Furthermore, the linear drive mechanism includes a linear motor, a chain drive mechanism, and a hydraulic telescopic cylinder.

[0018] Furthermore, the locking mechanism includes a locking pin, a telescopic cylinder, and a locking pin hole. The locking pin holes are located on opposite sides of the flip plate and are respectively located on both sides of the flip shaft. The locking pin holes on both sides are equidistant from the flip shaft. The locking pin and the telescopic cylinder are located inside the main body of the jump plate. The free end of the telescopic cylinder is provided with a locking pin. The locking pin and the locking pin hole are aligned. After the flip plate flips and falls into place, the locking pin hole and the locking pin are aligned. The locking pin is inserted into the locking pin hole to fix the flip plate to the main body of the jump plate.

[0019] The advantages and beneficial effects of this invention are as follows: 1. Through the coordinated design of the support mechanism and the landing mechanism, the joint bearing at the free end of the support cylinder can realize the spatial rotation of the landing mechanism. With the help of two mutually perpendicular stabilizing cylinders, it can flexibly adapt to different beach slopes and height differences, solving the problem that traditional fixed structures cannot be adjusted. The design of the triangular longitudinal ribs, spaced transverse ribs and connecting fixing plates of the hinge frame takes into account both structural strength and load transmission stability. The setting of weight reduction holes achieves lightweighting while ensuring load-bearing capacity, reducing the load and energy consumption of the main body of the ramp.

[0020] 2. The hydraulic system is equipped with components such as coolers and filters to ensure the cleanliness and temperature stability of the hydraulic oil, thus extending the life of hydraulic components; the electrical system achieves precise control through the pump station control box and valve group control box, ensuring stable cylinder operation.

[0021] 3. The tilting system, through the coordinated operation of components such as the tilting plate, guide rails, and swing arms, enables the support device to tilt 180° and change its orientation. Combined with the rigid fixation of the locking mechanism, the support device can be stored on the side of the gangway when it is retracted, avoiding the damage to the hull appearance, equipment corrosion, and port berthing restrictions caused by the exposure of traditional structures. This improves the safety of ship navigation and dock adaptability. The overall solution balances loading and unloading efficiency, structural reliability, and operational flexibility, significantly enhancing the comprehensive benefits of roll-on / roll-off (Ro-Ro) cargo transportation operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the process of deploying and retrieving the gangplank from the shore. Figure 2 This is an overall schematic diagram of a shipboard gangway overlapping support device according to the present invention; Figure 3 This is a schematic diagram of the support mechanism and landing mechanism in this invention; Figure 4 This is an exploded perspective view of the support mechanism and landing mechanism in this invention; Figure 5 This is a schematic diagram of the hydraulic system in this invention; Figure 6 This is a perspective view of the control support device movement of the flipping system in this invention; Figure 7 This is a plan view of the control support device operation of the flipping system in this invention; In the diagram: 1. Main body of the ramp; 2. Hull; 3. Overlap edge; 4. Support mechanism; 5. Landing mechanism; 6. Hydraulic system; 7. Electrical system; 8. Support cylinder; 9. Joint bearing; 10. Landing frame; 11. Hinge frame; 12. Pad; 13. Buffer block; 14. Stabilizing cylinder; 15. First hinge seat; 16. Second hinge seat; 17. Longitudinal rib; 18. Hinge end; 19. Transverse rib; 20. Connecting fixing plate; 21. Weight reduction hole; 22. Hydraulic pipeline; 23. Tilting system; 24. Guide rail; 25. Slider; 26. Swing arm; 28. Tilting shaft; 29. ​​Sliding shaft; 30. U-shaped opening; 31. Locking pin; 33. Locking pin hole; 34. Tilting plate. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to examples. These examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] A type of ship gangway lap support device, such as Figure 1-5 As shown, the device includes a gangplank body 1, with one side hinged to the hull 2 ​​and the opposite side forming an overlap edge 3. The gangplank body 1 serves as the core load-bearing foundation, with one side hinged to the hull 2. This retains the gangplank's ability to rotate around the hinge point for adjustment, while the overlap edge 3 on the opposite side, in conjunction with the support device, forms an overlap end that can flexibly adapt to the conditions of the shoreline. Utilizing the rotating joint between the hull 2 ​​and the gangplank, the gangplank can adjust its base angle initially through its own weight and the auxiliary drive mechanism of the hull 2 ​​(such as the winch originally equipped on the ship), laying the foundation for precise adaptation of the subsequent support device.

[0025] The support mechanism 4, as the core adjustment unit of the device, uses the support cylinder 8 as the actuating element. It is fixed to both sides of the end of the ramp body 1 with high-strength bolts, forming a rigid connection between the support cylinder 8 and the ramp body 1. This ensures that the force exerted by the cylinder during extension and retraction can be stably transmitted to the ramp. Simultaneously, the bolt connection facilitates cylinder disassembly and assembly during later maintenance, reducing maintenance difficulty. The support cylinder 8 is a marine-grade model, using pressurized oil supplied by the hydraulic system 6 to push the cylinder piston rod to extend and retract, thereby adjusting the height of the ramp's overlapping end. The spherical bearing 9 located at the free end of the cylinder, such as… Figure 4 As shown, the spherical bearing 9 utilizes a spherical sliding pair to achieve multi-directional angle compensation, enabling the landing mechanism 5 to rotate at multiple angles in space around the center of the spherical bearing 9. This allows the landing mechanism 5 to automatically adjust its contact angle according to the slope of the beach. Even when the beach has a slight inclination (such as left higher than right or front and back slopes), it can still ensure stable contact between the landing mechanism 5 and the beach, avoiding support instability caused by insufficient contact area. In addition, the support cylinder 8 is designed to be independently controllable for extension and retraction. Through the electrical system 7, the hydraulic valve group is individually controlled, allowing the two cylinders to adjust their extension lengths according to the height difference of the beach. For example, when the left side of the beach is higher than the right side, the extension length of the left cylinder is shortened and the extension length of the right cylinder is increased, ultimately achieving horizontal balance at the ramp joint. Compared with synchronous telescopic cylinders, this independent adjustment capability greatly expands the adaptability of the device to uneven beaches, covering most of the terrain differences of nearshore beaches.

[0026] Landing mechanism 5, as the direct contact unit between the device and the shore, adopts a frame structure welded from high-strength structural steel plates. Utilizing the high strength of the steel and the integrity of the welded structure, a rigid frame capable of transmitting lap support loads is constructed, ensuring that the load during vehicle passage is evenly distributed to the shore, preventing shore collapse or deformation of landing mechanism 5 due to localized overload. The base plate 12 at the bottom of the frame serves as the direct bearing surface, forming a multi-layered protective structure in conjunction with the stabilizing cylinder 14 and buffer block 13: the base plate 12 increases the contact area between landing mechanism 5 and the shore, reducing pressure per unit area and minimizing indentation of the soft shore by expanding the contact area; the stabilizing cylinder 14 is designed to counteract the lateral loads generated during vehicle passage. Its principle is to form bidirectional lateral support through two cylinders arranged perpendicularly to each other. Specifically, as shown... Figure 3 , 4As shown, the side of the free end of the supporting cylinder 8 is provided with a first hinge seat 15 and a second hinge seat 16 in mutually perpendicular directions. The two hinge seats are respectively hinged to the stabilizing cylinder 14; the other ends of the two stabilizing cylinders 14 are hinged to the pad plate 12. When the main body 1 of the ramp is subjected to lateral load, one side of the stabilizing cylinder 14 is compressed and the other side is stretched. The hydraulic locking function inside the cylinder restricts the lateral displacement of the landing mechanism 5. Compared with the unidirectional support that only relies on the supporting cylinder 8, the bidirectional stabilizing cylinder 14 increases the anti-tilt capability of the landing mechanism 5 by at least 1.5 times. The buffer block 13 is set at the bottom of the pad 12. The buffer block 13 is made of nylon and can buffer during the overlapping process. It uses the elastic deformation characteristics of nylon material to absorb the impact energy at the moment the landing mechanism 5 comes into contact with the beach. For example, when the overlapping end of the ramp falls, the buffer block 13 first comes into contact with the beach and deforms, converting the rigid impact into the energy absorption process of elastic deformation, avoiding the direct impact of the hard beach surface on the landing mechanism 5. At the same time, the nylon material has the characteristics of seawater corrosion resistance and wear resistance. Compared with the traditional rubber buffer block 13, it has a longer service life and can still maintain good elasticity in low temperature environment, adapting to the climate conditions of different sea areas in the nearshore. Furthermore, the design of the hinge frame 11 in the landing frame 10 is both functional and rational: the two triangular longitudinal ribs 17 utilize the stability of triangles to enhance the ribs' bending resistance, while the hinge design at the high point allows the force of the supporting cylinder 8 to be transmitted to the pad plate 12 through the ribs, preventing the force transmission path from deviating; the transverse ribs 19 spaced apart on the outer side of the longitudinal ribs 17 increase the moment of inertia of the frame section, enhancing the torsional performance of the entire landing frame 10 and preventing the frame from twisting due to lateral forces during vehicle passage; and the connecting fixing plate 20 between the longitudinal ribs 17 further strengthens the overall integrity of the frame, ensuring that the load can be evenly transmitted within the frame. Meanwhile, the weight-reducing holes 21 on the longitudinal ribs 17, transverse ribs 19, and connecting fixing plate 20, while ensuring structural strength, reduce the overall weight of the landing mechanism 5 by removing material from non-critical parts, reducing the load on the supporting cylinder 8 and improving adjustment efficiency. The weight-reducing holes 21 also facilitate the discharge of seawater and sediment, preventing corrosion problems caused by the accumulation of impurities within the frame.

[0027] Hydraulic system 6 serves as the power source for the device. Its core is the coordinated operation of the hydraulic pump station and hydraulic valve assembly. The hydraulic pump station includes a hydraulic oil tank, hydraulic pump, cooler, control air filter, and filter. The hydraulic oil tank stores hydraulic oil and also serves to dissipate heat and settle impurities, ensuring the cleanliness and temperature stability of the hydraulic oil. The hydraulic pump, as a power component, converts mechanical energy into hydraulic energy through a motor drive, providing pressurized oil to the entire system. A hydraulic pump suitable for marine operating conditions is selected to ensure stable pressure output even under turbulent and tilting conditions. The cooler reduces the temperature of the hydraulic oil through air or water cooling, preventing excessively high oil temperatures from causing a decrease in hydraulic oil viscosity and aging of seals, ensuring system stability. The control air filter balances the air pressure inside and outside the oil tank and filters impurities from the air entering the tank, preventing dust and moisture from contaminating the hydraulic oil. The filter is installed at key locations in the hydraulic pipeline 22 (such as the pump's suction and pressure ports), removing solid particulate impurities from the hydraulic oil through the filter element's filtration function, preventing impurities from entering the cylinders and valve assemblies, thus extending the service life of hydraulic components. The control valve group (such as multi-way valve, check valve, relief valve, etc.) in the hydraulic valve group works by controlling the flow direction, pressure and flow rate of hydraulic oil through the movement of the valve core. For example, the multi-way valve is used to control the extension and retraction direction of the support cylinder 8 and the stabilizing cylinder 14, the check valve prevents the hydraulic oil from flowing back, and the relief valve is used to limit the maximum pressure of the system and protect the hydraulic components from overpressure damage. The support cylinder 8 and the stabilizing cylinder 14 are connected to the hydraulic pump station through the hydraulic pipeline 22 to form a closed hydraulic circulation loop. The principle is that the pressurized oil output by the hydraulic pump is delivered to the valve group through the pipeline, and after being distributed by the valve group, it enters the rodless chamber or rod chamber of the corresponding cylinder, pushing the piston rod to extend and retract. After the action is completed, the hydraulic oil returns to the oil tank through the return oil pipeline, realizing the recycling of hydraulic oil. Compared with mechanical transmission (such as gear and screw transmission), hydraulic transmission has the advantages of small size, large output and smooth operation, and is more suitable for the needs of large load and high precision adjustment in marine applications.

[0028] Electrical system 7, as the control core of the device, plays a crucial role in driving the hydraulic pump station motor and controlling the cylinder movements. Its principle is to achieve automated control of the entire system through electrical components (such as contactors, relays, and PLC controllers) within the pump station control box and valve group control box. When the slipway provides a signal to allow connection, electrical system 7 first receives the signal and supplies power to the hydraulic pump station motor, driving it to start and subsequently operating the hydraulic pump. Simultaneously, electrical system 7 controls the valve core movement of the hydraulic valve group through solenoid valves in the valve group control box, achieving precise control of the extension and retraction of the support cylinder 8 and stabilizing cylinder 14. Its control logic can be preset according to actual needs (e.g., automatically adjusting the cylinder extension length based on signals from the shore height difference sensor, or manual control via buttons). The design of electrical system 7 fully considers the special characteristics of the marine environment, selecting waterproof, corrosion-resistant, and vibration-resistant electrical components to ensure stable operation in humid, salt spray, and turbulent environments. The system also features overload and short-circuit protection functions; in the event of motor overload or short circuit, it automatically cuts off the power supply to protect the electrical components and the entire device.

[0029] From the overall workflow perspective, the construction and operation of the device fully demonstrates the synergy and rationality of each system: In the initial state, the slipway provides a signal to allow connection, which is not only a safety permit but also a trigger condition for the electrical system 7 to start, ensuring that the device only operates under safe conditions; after the slipway is powered on, the gangplank begins to rotate toward the shore under the drive of the original ship's auxiliary mechanism. When it approaches the shore, the electrical system 7 starts the hydraulic pump station motor, and the hydraulic pump station begins to work, driving the hydraulic oil in the oil tank to enter the hydraulic valve group through the hydraulic pipeline 22; at this time, the operator can adjust the operation according to the actual terrain of the shore (such as by visual observation). (Based on observation or sensor feedback), the electrical system 7 controls the independent extension and retraction of the support cylinder 8. For example, when there is a height difference between the shore and the beach, the extension length of the cylinders on both sides is adjusted so that the landing mechanism 5 gradually fits against the beach. At the same time, the stabilizing cylinder 14, under the control of the electrical system 7, keeps the landing mechanism 5 stable and avoids shaking during the fitting process. The buffer block 13 plays a buffering role when the landing mechanism 5 contacts the beach, reducing the impact. Finally, when the support cylinder 8 is adjusted to a balanced state and the landing mechanism 5 is stably fitted against the beach, the device forms a complete vehicle passage, and vehicles can enter the ship from the shore through the gangplank to realize cargo transfer.

[0030] Since the gangplank body 1 is hinged to the hull 2, the support device is located at the bottom of the gangplank body 1 during use. When the gangplank is rotated and retracted, the support device is exposed on the outside of the hull 2, affecting the overall appearance of the hull 2. As an improvement, a flipping system 23 is provided on the gangplank body 1, and the support device is set on the flipping system 23, allowing the support device to be flipped and controlled to face the two sides of the gangplank body 1. The flipping system 23 includes a flipping plate 34 and a locking mechanism. After the flipping plate 34 rotates 180° and falls back into its original position, it is fixed by the locking mechanism. Figure 5-7 As shown, after the gangplank body 1 is equipped with the flipping system 23, when the gangplank body 1 needs to be connected to the shore, the support device can be rotated and positioned at the bottom of the gangplank body 1 under the control of the flipping system 23, just as in the previous embodiment. When the gangplank body 1 needs to be retracted, the flipping system 23 can be controlled to rotate the support device toward the upper side of the gangplank body 1. After the gangplank body 1 is retracted, the appearance of the hull 2 ​​remains relatively flat and will not affect the appearance and size of the hull 2.

[0031] Specifically, the flipping system 23 includes a guide rail 24, a slider 25, a swing arm 26, and a linear drive mechanism. A flipping shaft 28 is provided in the middle of the flipping plate 34, and a sliding shaft 29 is provided on one side of the flipping plate 34 and parallel to the flipping shaft 28. The end of the sliding shaft 29 is rotatably disposed within the slider 25. The guide rail 24 is disposed on the main body 1 of the springboard, and the slider 25 is slidably disposed within the guide rail 24. In actual installation, the guide rail 24 is disposed on opposite sides of the U-shaped opening 30 provided on the side of the main body 1 of the springboard. The opening direction of the U-shaped opening 30 is towards both sides of the springboard. The U-shaped opening 30 is the locking position of the flipping plate 34, meaning that after flipping, the flipping plate 34 falls horizontally into the U-shaped opening 30 and is fixed by the locking mechanism. The first end of the swing arm 26 is hinged to one end of the guide rail 24, and the second end of the swing arm 26 is hinged to the flipping shaft 28. The linear drive mechanism drives the slider 25 to slide within the guide rail 24 to provide power for flipping the flipping plate 34. In actual use, flipping systems 23 are respectively set on both sides of the flipping plate 34. The flipping systems 23 on both sides simultaneously control the flipping plate 34 to flip, so that the flipping of the flipping plate 34 can be more balanced and stable. In use, the sliders 25 on both sides are driven by the linear drive mechanism to move within the guide rail 24. When the sliders 25 on both sides move, the sliding shaft 29 can be controlled to move along the guide rail 24. In addition, in conjunction with the swing arm 26, it can be understood that the swing arm 26 can be set to actively swing, so the swing arm 26 can assist the flipping plate 34 to flip more smoothly. Specifically, the main body 1 of the springboard is provided with a rotary drive mechanism to drive the swing arm 26 to swing. The rotary drive mechanism includes a rotary hydraulic cylinder. The output end of the rotary hydraulic cylinder is connected to the first end of the swing arm 26 and controls the swing arm 26 to swing back and forth within its rotation range with the first end as the axis.In actual use, the slider 25 and the swing arm 26 work simultaneously. When the swing arm 26 swings, it lifts the middle part of the flipping plate 34, that is, the flipping shaft 28 lifts off the surface of the main body 1 of the springboard. At this time, in conjunction with the sliding of the slider 25, the sliding shaft 29 is controlled to move from one end of the guide rail 24 to the other end. When it passes the midpoint of the guide rail 24, the swing arm 26 also swings to the end position and is controlled by the rotating hydraulic cylinder to rotate in the opposite direction back to the position flush with the main body 1 of the springboard. At this time, the slider 25 also slides from the midpoint position to the other end. Thus, the flipping plate 34 completes one flip. That is, the bottom surface of the gangplank body 1 is flipped to the top surface of the gangplank body 1; of course, it can also be controlled in the opposite direction to make the flipping plate 34 rotate again to flip the support device to the bottom surface of the gangplank body 1; in actual use, during the process of lowering the gangplank body 1, the flipping plate 34 is controlled to flip so that the support device is located on the bottom surface of the gangplank; when leaving the shore, the hydraulic winch pulls up the gangplank body 1 through the transmission steel cable, and then the flipping plate 34 is controlled to flip so that the support device faces the upper side of the gangplank body 1. After the gangplank body 1 is closed, there is no support device exposed on the surface of the hull 2, making the outer surface of the hull 2 ​​more regular.

[0032] Furthermore, the linear drive mechanism includes a linear motor, a chain drive mechanism, and a hydraulic telescopic cylinder. In actual use, the linear motor, the chain drive mechanism, and the hydraulic cylinder can all be used to drive the slider 25 to move within the guide rail 24. One of them can be selected according to the actual situation and arranged side by side on one side of the guide rail 24 and connected to the slider 25 to control the reciprocating movement of the slider 25.

[0033] Furthermore, the locking mechanism includes a locking pin 31, a telescopic cylinder, and a locking pin hole 33. The locking pin hole 33 is located on opposite sides of the flip plate 34, and the locking pin holes 33 are respectively located on both sides of the flip shaft 28. The locking pin holes 33 on both sides are equidistant from the flip shaft 28. The locking pin 31 and the telescopic cylinder are located inside the jump plate body 1. The free end of the telescopic cylinder is provided with the locking pin 31. The locking pin 31 and the locking pin hole 33 are aligned. After the flip plate 34 is flipped and positioned, the locking pin hole 33 and the locking pin 31 are aligned. The locking pin 31 is inserted into the locking pin hole 33 to fix the flip plate 34 to the jump plate body 1. Understandably, after the flip plate 34 has finished flipping, it remains in the same plane as the main body 1 of the jumping platform. The flipping shaft 28 and sliding shaft 29 of the flip plate 34 are not fixed shafts, and the flip plate 34 rotates spatially relative to the main body 1 of the jumping platform. In order to ensure that the support device can still be firmly connected to the main body 1 of the jumping platform and transmit the support force, the device is further equipped with a locking mechanism. The telescopic cylinder is fixedly installed in the main body 1 of the jumping platform. The locking pin part 31 is extended or retracted by the telescopic cylinder. A locking pin hole 33 is provided on the side of the flip plate 34. When the main body 1 of the jumping platform is being pulled up or lowered by the transmission steel cable, and the support device has not yet played a supporting role, the flipping system 23 controls the flipping to complete the flipping. After the flip plate 34 falls back to be flush with the main body 1 of the jumping platform, the locking pin part 31 is controlled to be inserted into the corresponding locking pin hole 33, thereby forming a firm connection between the flip plate 34 and the main body 1 of the jumping platform, without affecting the supporting role of the support device for the main body 1 of the jumping platform.

[0034] In this embodiment, the flipping system 23 focuses on "flippable storage" and integrates the support device onto the flipping plate 34. The 180° rotation of the flipping plate 34 allows for orientation switching of the support device, transforming it from being "always fixed to the bottom of the ramp" to "adjustable according to usage." The flipping plate 34 serves as the supporting base, with its central flipping shaft 28 and side sliding shaft 29 forming a "dual-axis cooperative" structure. The flipping shaft 28 provides the basic rotation fulcrum for the flipping plate 34, while the sliding shaft 29, in conjunction with the slider 25 and guide rail 24, achieves position compensation during the flipping process. The flipping shaft 28 can only rotate at a fixed point, while the movement of the sliding shaft 29 allows the flipping plate 34 to adjust its spatial position during rotation, preventing interference with the ramp body 1 or the hull 2 ​​structure during flipping and ensuring a smooth 180° flipping operation. The guide rails 24 are set on both sides of the U-shaped opening on the side of the main body of the springboard 1. The U-shaped opening not only provides storage space for the flip plate 34, but its opening direction is also oriented towards the sides of the springboard. This design also allows the flip plate 34 to fall accurately into the opening after flipping, forming an appearance that is flush with the main body of the springboard 1. This ensures that the flip plate 34 is structurally consistent with the main body of the springboard 1 after being folded up, and avoids appearance protrusions or dimensional deviations caused by flipping deviations.

[0035] From the perspective of motion mechanism, the flipping action of the flipping system 23 relies on the coordinated control of "linear drive + swing drive" to convert linear motion into spatial rotational motion of the flipping plate 34. Specifically, when it is necessary to flip the support device from the bottom to the top of the platform, the linear drive mechanism (such as a hydraulic telescopic cylinder) first drives the slider 25 to move within the guide rail 24. The slider 25 drives the sliding shaft 29 to slide along the rail. At this time, the movement of the sliding shaft 29 will provide lateral traction force for the flipping plate 34. At the same time, the rotation drive mechanism (rotary hydraulic cylinder) inside the platform body 1 drives the swing arm 26 to swing around the hinge point. The swing arm 26, through its connection with the flipping shaft 28, drives the middle part of the flipping plate 34 to lift, so that the flipping plate 34 is separated from the surface of the platform body 1, forming the spatial gap required for rotation. During this process, the sliding of slider 25 and the swinging of swing arm 26 form a synergistic effect of "traction + lifting". The lateral movement of slider 25 provides horizontal motion power for flipping plate 34, while the swinging of swing arm 26 provides vertical lifting force for flipping plate 34. The two work together to make flipping plate 34 slowly rotate around the virtual rotation center (determined by the relative position of sliding axis 29 and flipping axis 28). When slider 25 moves to the midpoint of guide rail 24, flipping plate 34 has just completed a 90° flip. At this time, swing arm 26 reaches the swing termination position, and the rotating hydraulic cylinder drives it to swing in the opposite direction. At the same time, slider 25 continues to move to the other end of the rail, driving flipping plate 34 to complete the remaining 90° flip, finally making the support device face the upper part of the jump plate, and flipping plate 34 falls into the U-shaped opening and is flush with the jump plate body 1. This "segmented cooperative motion" avoids the 180° large-angle flipping that is difficult to complete by a single drive mechanism by disassembling the motion. At the same time, by using the motion switching at the midpoint position, it ensures the torque balance during the flipping process and prevents the flipping plate 34 from shaking or jamming due to uneven force. Compared with the flipping mechanism with a single drive, its motion stability and reliability are significantly improved.

[0036] The locking mechanism is crucial for ensuring a secure connection between the tilting plate 34 and the ramp body 1 after tilting. The locking pin 31 is driven by a telescopic cylinder, and its telescopic movement is linked to the tilting movement of the tilting plate 34. When the tilting plate 34 completes its tilt and falls into the U-shaped opening, the electrical system 7 triggers the telescopic cylinder to push the locking pin 31 into the locking pin hole 33. At this point, the tilting plate 34 and the ramp body 1 form a rigid connection, restricting the horizontal and vertical displacement of the tilting plate 34. This ensures that when the support device is working, the load of the vehicle can be stably transmitted to the ramp body 1 through the tilting plate 34, preventing support failure due to loose connection. In addition, the design of the locking mechanism also fully considers safety. When the ramp body 1 is lowered and the support device needs to work, the locking mechanism ensures that the tilting plate 34 is fixed to the bottom of the ramp, preventing the tilting plate 34 from accidentally tilting during support. When the ramp is retracted, the locking mechanism can fix the tilting plate 34 in the U-shaped opening, preventing the tilting plate 34 from shaking due to turbulence during navigation, thus balancing operational reliability and navigation safety.

[0037] The design of the flipping system 23 in this embodiment not only solves the aesthetic problem but also achieves multiple improvements in practicality and adaptability. Regarding appearance and size, when the support device is retracted, it flips to the upper part of the gangway and is stored within the U-shaped opening, keeping the surface of the hull 2 ​​flat and avoiding the protrusions of traditional fixed structures. This advantage is particularly evident when the ship is docked or sailing, meeting both the aesthetic requirements of the ship's exterior design and preventing dimensional deviations caused by exposed support devices, thus reducing the risk of collisions with dock facilities or other vessels. In terms of ease of operation, the operation of the flipping system 23 is controlled by the linkage between the electrical system 7 and the hydraulic system 6, enabling automated flipping. Operators only need to use control buttons to switch the orientation of the support device without manual adjustment. Compared to traditional support structures that require disassembly or folding, this significantly reduces operational intensity and improves the efficiency of gangway retraction and deployment. All components of the tilting system 23 (such as the linear drive mechanism, swing arm 26, and locking mechanism) are integrated inside or on the side of the gangway body 1, requiring no major modifications to the hull structure 2. This allows for compatibility with gangways of different models. The principle behind this system is to reduce the difficulty of adapting to existing structures through modular design, balancing the needs of both old ship retrofitting and new ship construction. The "dual-axis collaboration + dual-drive control" design in this embodiment ensures precise and controllable tilting movements, while the rigid connection of the locking mechanism ensures stable transmission of the supporting load.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A marine gangway overlapping support device, characterized in that, The system includes a gangplank body, one side of which is hinged to the hull, and the opposite side forming an overlap edge; the support device includes a support mechanism, a landing mechanism, a hydraulic system, and an electrical system. The support mechanism includes a support cylinder, one end of which is fixedly connected to the main body of the ramp. The free end of the support cylinder is provided with a joint bearing. The support cylinder is connected to the landing mechanism through the joint bearing, so that the landing mechanism can rotate in space around the mating point of the joint bearing. The landing mechanism includes a landing frame and a buffer block; the upper surface of the landing frame is provided with a hinge frame, and the bottom of the landing frame is provided with a buffer block; The hydraulic system includes a hydraulic pump station that supplies hydraulic oil to the hydraulic units within the support device; The electrical system includes a motor that drives the hydraulic pump station and controls the hydraulic cylinders to extend and retract as required.

2. The marine gangway overlapping support device according to claim 1, characterized in that, The landing frame also includes a pad, and the landing mechanism also includes two stabilizing cylinders, with the planes of the two stabilizing cylinders being perpendicular to each other. The free end of the supporting cylinder is provided with a first hinge seat and a second hinge seat in mutually perpendicular directions. The two hinge seats are respectively hinged to one end of the stabilizing cylinder; the other ends of the two stabilizing cylinders are respectively hinged to the pad plate.

3. The marine gangway overlapping support device according to claim 2, characterized in that, The hinge frame includes two parallel longitudinal ribs, which are triangular in shape. The high point of the two longitudinal ribs is set as the hinge end with the spherical bearing supporting the hydraulic cylinder. The longitudinal ribs are vertically fixed on the pad, and multiple transverse ribs are arranged vertically at intervals on the outer side of the two longitudinal ribs. A connecting and fixing plate is provided between the two longitudinal ribs on the hypotenuse of the triangle.

4. The marine gangway overlapping support device according to claim 3, characterized in that, The longitudinal ribs, transverse ribs, and connecting fixing plates are provided with several weight-reducing holes.

5. A marine gangway overlapping support device according to claim 2, characterized in that, The hydraulic system also includes hydraulic valve groups and hydraulic pipelines. The hydraulic pump station includes a hydraulic oil tank, a hydraulic pump, and is equipped with a cooler, a control air filter, and a filter. The hydraulic valve group includes several control valve groups. The support cylinder and the stabilizing cylinder are connected to the hydraulic pump station through hydraulic pipelines, and control valve groups are installed on the hydraulic pipelines.

6. The marine gangway overlapping support device according to claim 1, characterized in that, The electrical system includes the pump station control box and the valve group control box.

7. The marine gangway overlapping support device according to claim 1, characterized in that, The main body of the springboard is provided with a flipping system, and the support device is provided on the flipping system so that the support device can be flipped and controlled to face the two sides of the main body of the springboard. The flipping system includes a flipping plate and a locking mechanism. After the flipping plate rotates 180° and falls back into its original position, it is fixed by the locking mechanism.

8. A marine gangway overlapping support device according to claim 7, characterized in that, The flipping system includes a guide rail, a slider, a swing arm, and a linear drive mechanism. A flipping shaft is located in the center of the flipping plate, and a sliding shaft is located on one side of the flipping plate, parallel to the flipping shaft. The end of the sliding shaft is rotatably disposed within the slider. The guide rail is mounted on the main body of the flipping plate, and the slider is slidably disposed within the guide rail. The first end of the swing arm is hinged to one end of the guide rail, and the second end of the swing arm is hinged to the flipping shaft. The linear drive mechanism drives the slider to slide within the guide rail to provide power for flipping the flipping plate.

9. A marine gangway overlapping support device according to claim 8, characterized in that, The main body of the springboard is equipped with a rotary drive mechanism that drives the swing arm to swing. The rotary drive mechanism includes a rotary hydraulic cylinder. The output end of the rotary hydraulic cylinder is connected to the first end of the swing arm and controls the swing arm to reciprocate within its rotation range with the first end as the axis.

10. A marine gangway overlapping support device according to claim 8, characterized in that, The locking mechanism includes a locking pin, a telescopic cylinder, and locking pin holes. The locking pin holes are located on opposite sides of the flip plate and are also located on both sides of the flip shaft. The locking pin holes on both sides are equidistant from the flip shaft. The locking pin and the telescopic cylinder are located inside the main body of the jump plate. The free end of the telescopic cylinder is provided with a locking pin. The locking pin and the locking pin holes are aligned. After the flip plate flips and falls into place, the locking pin holes and the locking pin are aligned. The locking pin is inserted into the locking pin holes to fix the flip plate to the main body of the jump plate.

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