Vehicle springboard platform for roll-on-roll-off ship

Abstract

The vehicle springboard platform for the roll-on-roll-off ship comprises a ship body, a first hinge seat is arranged on the ship body, a main shaft is rotationally connected into the first hinge seat, a main platform is arranged on the main shaft, and a traction piece for driving the main shaft to rotate is arranged on the ship body; a limiting assembly for limiting the inclination of the main platform at a specified angle is arranged on the first hinge seat, a first compensation assembly and a second compensation assembly are arranged at the end, away from the main shaft, of the main platform, and when the main platform is at the specified angle and is not in lap joint with the wharf, the first compensation assembly compensates the height difference between the main platform and the wharf; the second compensation assembly compensates for the length difference between the main platform and the wharf. The inclination angle of the vehicle springboard platform can be kept within the safety threshold value, and normal operation of transportation operation of the roll-on roll-off truck is ensured.

Description

Technical Field

[0001] This application relates to the field of roll-on / roll-off (Ro-Ro) ship technology, and in particular to a vehicle ramp platform for Ro-Ro ships. Background Technology

[0002] Vehicle ramp platforms are essential devices for connecting roll-on / roll-off (Ro-Ro) ships to quay docks. Traditional vehicle ramp platforms typically consist of a deck articulated to the hull, with a traction device installed on the hull to drive the deck to rotate. When the Ro-Ro ship docks, the traction device on the hull drives the deck to rotate and unfold toward the dock, so that the end of the deck away from the hull rests on the dock. At this time, the deck forms a connecting channel between the ship and the dock, allowing Ro-Ro vehicles to complete cargo transfer through a horizontal loading and unloading method of "rolling on and off".

[0003] However, in actual use, factors such as changes in the ship's draft, differences in the quay surface height, and tidal fluctuations can cause the tilt angle of the ramp platform to exceed the safety threshold for normal operations. At this time, the gravitational component of the ro-ro ship on the ramp platform increases. During loading, more power is needed to overcome the gravitational component, which may lead to insufficient power and difficulty for the ro-ro trucks to climb the slope, delaying the loading progress. During unloading, the gravitational component is converted into additional downward driving force, which increases the speed of the ro-ro trucks, thereby reducing the stability of the ro-ro ship. If the anti-slip performance of the deck surface is reduced due to seawater splashing and condensation, it may further lead to safety accidents such as vehicle skidding.

[0004] In summary, existing ro-ro vehicle ramp platforms pose a risk of tilting angles exceeding safety thresholds during actual use, which is detrimental to the normal transportation operations of ro-ro vehicles on the ramp platforms and has obvious shortcomings. Summary of the Invention

[0005] In order to keep the tilt angle of the vehicle ramp platform within a safe threshold and ensure the normal operation of roll-on / roll-off vehicle transportation, this application provides a roll-on / roll-off ship vehicle ramp platform.

[0006] The technical solution for a roll-on / roll-off marine vehicle ramp platform provided in this application is as follows: A roll-on / roll-off (Ro-Ro) vehicle gangway platform includes a hull, a first hinge seat on the hull, a main shaft rotatably connected within the first hinge seat, a main platform mounted on the main shaft, a traction member on the hull for driving the main shaft to rotate, a limiting component on the first hinge seat for limiting the tilt of the main platform to a specified angle, and a first compensation component and a second compensation component at the end of the main platform away from the main shaft. When the main platform is at the specified angle and not connected to the dock, the first compensation component compensates for the height difference between the main platform and the dock, and the second compensation component compensates for the length difference between the main platform and the dock.

[0007] By adopting the above technical solution, during use, the traction component, together with the limiting component, drives the main platform to rotate to a specified angle. At this time, the tilt of the main platform is within the safety threshold. If the end of the main platform is not connected to the dock at this time, the first compensation component fills the height gap between the main platform and the dock, so that the main platform and the dock can be stably connected. The second compensation component makes up for the horizontal length difference between the main platform and the dock by extending, so that the main platform and the dock form a smooth transition connection surface, thereby ensuring the normal operation of the roll-on / roll-off transportation operation and making up for the deficiencies in the existing technology.

[0008] Optionally, the pulling component includes hydraulic cylinders hinged to opposite sides of the main platform, with the ends of the hydraulic cylinders away from the main platform hinged to the hull. A limiting arc groove is formed on the outer wall of the first hinge seat. The limiting component includes a limiting block slidably connected in the limiting arc groove. A first sensor is provided on the inner wall of the limiting arc groove. When the limiting block abuts against the first sensor, the tilt angle of the main platform is a specified angle. A second sensor is provided on the bottom wall of the main platform away from the main shaft.

[0009] By adopting the above technical solution, during use, the piston rod of the hydraulic cylinder extends to push the main shaft to rotate. When the main shaft rotates, it drives the limiting block to slide in the limiting arc groove toward the direction of the first sensor. If the second sensor is triggered before the first sensor, the tilt angle when the main platform is connected to the dock is less than the specified angle. If the limiting block abuts against the first sensor before the second sensor is triggered, the first sensor controls the hydraulic cylinder to stop moving, and the main platform stays at the specified angle. This ensures that the tilt angle when the main platform is connected to the dock is less than or equal to the specified angle. The signals from the first and second sensors can be used to determine whether the main platform is connected to the dock after reaching the specified angle, which serves as the start signal for the first and second compensation components.

[0010] Optionally, the main platform is provided with a receiving groove, and the first compensation component includes a compensation plate slidably connected inside the receiving groove. The inner side wall of the receiving groove is provided with a moving groove, and a bidirectional lead screw is rotatably connected inside the moving groove. The two ends of the bidirectional lead screw with opposite threads are threadedly connected to moving blocks that slide in cooperation with the moving groove. Each moving block is hinged with a compensation rod, and the ends of the two compensation rods away from the corresponding moving blocks are hinged to the compensation plate. A compensation motor that drives the bidirectional lead screw to rotate is provided on the outer surface of the main deck.

[0011] By adopting the above technical solution, when the first sensor is triggered before the second sensor, the compensation motor drives the bidirectional lead screw to rotate. Under the guidance and limit of the moving slot, the bidirectional lead screw drives the two moving blocks to move closer to each other, thereby pushing the two compensation rods to retract inward synchronously. When the compensation rods retract, they drive the compensation plate to move downward until it abuts against the dock surface. At this time, the compensation plate and compensation rod fill the height gap between the main platform and the dock, so that the main platform can obtain additional support when it is not connected to the dock, reducing the possibility of the main platform swaying when it is only supported by the main shaft and the first hinge seat, thereby improving the stability of the main platform after it rotates to the specified angle.

[0012] Optionally, the second compensation component includes a second hinge seat disposed at the end of the main platform, a secondary shaft rotatably connected inside the second hinge seat, a secondary platform disposed on the secondary shaft, a connecting plate sleeved on the outer surface of the secondary shaft, a movable pin disposed on the connecting plate, a compensation cylinder disposed on the outer surface of the main platform, a sliding frame disposed on the piston rod of the compensation cylinder, and a waist-shaped groove provided on the sliding frame for sliding cooperation with the movable pin.

[0013] By adopting the above technical solution, when the first sensor is triggered before the second sensor, the piston rod of the compensation cylinder extends synchronously, pushing the sliding frame to move towards the sub-platform. With the sliding cooperation of the waist-shaped groove and the moving pin, the sliding frame moves and pushes the moving pin to move in the waist-shaped groove. At the same time, the moving pin drives the connecting disc to rotate around the sub-shaft, thereby causing the sub-platform to rotate and unfold around the second hinge seat until it overlaps the dock surface, thus forming a continuous and complete passage for the roll-on / roll-off vehicle. At the same time, the sub-platform abuts against the dock, making the entire ramp platform have more support points, effectively dispersing the lateral load and impact when the roll-on / roll-off vehicle passes, and further improving the stability of the ramp platform after unfolding.

[0014] Optionally, the hull is equipped with a water supply assembly, which includes a water tank. A first water pipe connected to the water body is connected to the water tank. A first water pump and a first valve are installed on the first water pipe. A third sensor for detecting height is installed at the bottom of the compensation block. An installation cavity is opened inside the compensation block. A water storage tank is installed inside the installation cavity. The water storage tank is connected to the water tank through a second water pipe. A second water pump and a second valve are installed on the second water pipe.

[0015] By adopting the above technical solution, when the third sensor detects that the height difference between the main platform and the dock is too large, the first valve and the first water pump are opened, and external water is drawn into the water tank through the first water pipe. After the total weight of the ship increases, the draft increases, thereby reducing the height difference between the main platform and the dock, so that the height difference returns to the range that the first compensation component can adapt to, reducing the possibility that the compensation plate needs to extend excessively due to the initial height difference being too large, thus reducing the support rigidity. After the compensation block abuts against the dock surface, the second valve and the second water pump can be opened to transport the water in the water tank to the storage tank. The increase in weight of the water increases the positive pressure between the compensation plate and the dock surface, thereby improving the support strength of the compensation block. The water supply component realizes the active adjustment of the height difference between the ship and the dock, and at the same time improves the support stability of the compensation plate.

[0016] Optionally, the compensation block is provided with a reinforcing component, which includes a plurality of third hinge seats disposed on the outer periphery of the compensation block. A connecting shaft is rotatably connected to the third hinge seat, and a reinforcing plate is disposed on the connecting shaft. A sliding groove is formed in the reinforcing plate, and a pressing plate is slidably connected inside the sliding groove. A support foot is hinged to the end of the pressing plate. A driving component is provided inside the compensation block, which drives the connected shaft to rotate in a direction away from the compensation block, and at the same time drives the support foot to abut against the dock surface.

[0017] By adopting the above technical solution, after the compensation block abuts against the ground, the drive component drives the connecting shaft to rotate in a direction away from the compensation block. The connecting shaft drives the reinforcing plate to spread out radially from the outer periphery of the compensation block. At the same time, the drive component synchronously drives the abutting plate in the sliding groove to extend outward, driving the support foot to press against the dock ground. In this way, a ring-shaped support frame is formed on the outer periphery of the support block, increasing the contact area between the compensation block and the dock, thus further improving the support strength of the compensation block.

[0018] Optionally, the drive assembly includes gears coaxially mounted on the connecting shaft, rack plates corresponding to each of the gears are slidably connected to the top wall of the mounting cavity, a drive plate is slidably connected inside the mounting cavity, the water storage tank is mounted on the drive plate, steel wire ropes corresponding to each of the rack plates are mounted on the drive plate, a reversing wheel corresponding to each of the steel wire ropes is mounted inside the mounting cavity, the ends of the steel wire ropes away from the drive plate pass around the reversing wheel and are mounted on the corresponding rack plates, a torsion spring is sleeved on the outer surface of the connecting shaft, one end of the torsion spring is mounted on the third hinge seat, and the other end is mounted on the connecting shaft, and in the natural state of the torsion spring, the reinforcing plate remains vertical.

[0019] By adopting the above technical solution, after the second valve and the second water pump are opened, water is injected into the water storage tank through the second water pipe. As the water volume increases, the weight of the water storage tank increases, pushing the drive plate to slide downward. When the drive plate moves downward, the wire rope pulls the rack plate towards the inside of the mounting cavity through the reversing wheel. When the rack plate slides, it drives the meshing gear to rotate, thereby the connecting shaft overcomes the elastic force of the torsion spring and rotates away from the compensation block, so that the reinforcing plate gradually unfolds from the vertical state to the inclined support state, thereby forming the skeleton of the surrounding support frame on the outer periphery of the compensation block. The drive component combines the weight-increasing function of the water storage tank with the unfolding drive of the reinforcing component to realize the multiple utilization of the water source.

[0020] Optionally, the drive assembly further includes an elastic bladder disposed on the bottom wall of the mounting cavity. The elastic bladder abuts against the end face of the drive plate opposite to the water storage tank. When the water storage tank is empty, the elastic bladder is in a naturally inflated state. An air supply pipe corresponding to one of the multiple sliding grooves is connected to the elastic bladder. The air supply pipe extends into the corresponding sliding groove and is connected to an air bladder. The air bladder is disposed on the abutment plate.

[0021] By adopting the above technical solution, when the water tank is filled with water, the drive plate moves downward under the gravity of the water and compresses the elastic bladder. The gas in the elastic bladder is forced into the inflation bladder through the air supply pipe. After the inflation bladder expands, it pushes the clamping plate to extend outward along the sliding groove. The movement of the clamping plate pushes the support foot to press against the surface of the dock. The support foot, together with the reinforcing plate, forms a ring-shaped support frame, which improves the support stability of the compensation block on the surface of the dock.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. This application, by setting up a limiting component, a first compensation component, and a second compensation component, allows the main platform to rotate to a predetermined angle when in use. At this time, the tilt of the main platform is within the safety threshold. If the end of the main platform is not connected to the dock at this time, the first compensation component fills the height gap between the main platform and the dock, so that the main platform and the dock can be stably connected. The second compensation component makes up for the horizontal length difference between the main platform and the dock by extending, so that the main platform and the dock form a smooth transition connection surface, thereby ensuring the normal operation of the roll-on / roll-off transportation operation and making up for the deficiencies in the prior art. 2. This application, by setting up a water supply component, allows for the following operation: When the third sensor detects an excessive height difference between the main platform and the dock, the first valve and the first water pump are activated. External water is drawn through the first water pipe and injected into the water tank. As the total weight of the hull increases, the draft increases, thereby reducing the height difference between the main platform and the dock. This brings the height difference back to the range that the first compensation component can adapt to, reducing the possibility that the compensation plate needs to extend excessively due to an excessive initial height difference, thus reducing the support rigidity. When the compensation block abuts against the dock surface, the second valve and the second water pump can be activated to transport water from the water tank to the storage tank. The increased weight of the water increases the normal pressure between the compensation plate and the dock surface, thereby improving the support strength of the compensation block. The water supply component enables active adjustment of the height difference between the hull and the dock, while also improving the support stability of the compensation plate. 3. By setting up a reinforcing component and a driving component, after the compensation block abuts against the ground, the driving component drives the connecting shaft to rotate in a direction away from the compensation block. The connecting shaft drives the reinforcing plate to spread out radially from the outer periphery of the compensation block. At the same time, the driving component synchronously drives the abutting plate in the sliding groove to extend outward, driving the support foot to press against the dock ground. In this way, a ring-shaped support frame is formed on the outer periphery of the support block, increasing the contact area between the compensation block and the dock, thus further improving the support strength of the compensation block. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this application.

[0024] Figure 2 This is a schematic diagram of the structure of the limiting component and the second compensation component in the embodiments of this application.

[0025] Figure 3 This is a schematic diagram of the structure of the first compensation component in the embodiments of this application.

[0026] Figure 4 This is a cross-sectional view of the compensation plate in an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Hull; 101. Loading port; 102. Pulling component; 2. First hinge seat; 21. Limiting arc groove; 3. Main shaft; 31. Main platform; 311. Receiving groove; 4. Limiting assembly; 41. Limiting block; 42. First sensor; 43. Second sensor; 5. First compensation assembly; 51. Compensation plate; 511. Mounting cavity; 5111. Limiting groove; 52. Bidirectional lead screw; 53. Moving block; 54. Compensating rod; 55. Compensating motor; 6. Second compensation assembly; 61. Second hinge seat; 62. Sub-platform; 63. Connecting plate; 64. Moving pin; 65. Compensating cylinder; 66. Sliding... Frame; 661, Waist-shaped groove; 7, Water supply assembly; 71, Water tank; 72, First water pipe; 721, First water pump; 722, First valve; 73, Second water pipe; 731, Second water pump; 732, Second valve; 74, Water storage tank; 8, Reinforcing assembly; 81, Third hinge seat; 82, Connecting shaft; 83, Reinforcing plate; 831, Sliding groove; 84, Abutting plate; 85, Support foot; 9, Drive assembly; 91, Gear; 92, Rack plate; 93, Drive plate; 931, Limiting block; 94, Steel wire rope; 95, Reversing wheel; 96, Torsion spring; 97, Elastic bladder; 98, Air supply pipe; 99, Inflatable bladder. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses a roll-on / roll-off (Ro-Ro) ship vehicle ramp platform.

[0030] Reference Figure 1 A roll-on / roll-off (Ro-Ro) vehicle gangway platform includes a hull 1, a loading port 101 for storing the gangway platform, a first hinge seat 2 fixedly connected to the end of the hull 1 near the loading port 101, a main shaft 3 rotatably connected inside the first hinge seat 2, a main platform 31 serving as the main base plate of the gangway platform fixedly connected to the main shaft 3, and a pulling member 102 installed on the hull 1 to drive the main platform 31 to unfold and retract. The pulling member 102 is a hydraulic cylinder hinged to the inner side wall of the loading port 101, and the piston rod of the hydraulic cylinder is hinged to both sides of the main platform 31.

[0031] Reference Figure 1 and Figure 2The first hinge seat 2 is provided with a limiting component 4 that cooperates with the pulling member 102. The limiting component 4 includes a limiting block 41 fixedly connected to the end of the main shaft 3 extending out of the first hinge seat 2. A limiting arc groove 21 that slides with the limiting block 41 is opened on the outer surface of the hinge seat. A first sensor 42 is fixedly connected to the inner side wall of one end of the limiting arc groove 21. When the limiting block 41 abuts against the first sensor 42, the tilt of the main platform 31 is a specified angle. This specified angle is within the safe threshold of the tilt of the main platform 31. A second sensor 43 is embedded on the bottom wall of the main platform 31 away from the main shaft 3. In this embodiment, the first sensor 42 and the second sensor 43 are both pressure sensors and are electrically connected to the hydraulic cylinder through the control system.

[0032] In use, the piston rod of the hydraulic cylinder extends to drive the main shaft 3 to rotate the main platform 31 toward the dock. When the main shaft 3 rotates, it drives the limit block 41 to slide in the limit arc groove 21 toward the direction of the first sensor 42. If the second sensor 43 is triggered before the first sensor 42, the second sensor 43 controls the hydraulic cylinder to stop. At this time, the tilt angle of the main platform 31 when it is connected to the dock is less than the specified angle. If the limit block 41 abuts against the first sensor 42 before the second sensor 43 is triggered, the first sensor 42 controls the hydraulic cylinder to stop. The main platform 31 stays at the specified angle. This ensures that the tilt angle of the main platform 31 when it is connected to the dock is within the safe threshold, thereby ensuring the normal operation of the roll-on / roll-off transportation operation.

[0033] Reference Figure 1 and Figure 2 During the rotation of the main platform 31, there may be a situation where the main platform 31 does not connect with the dock when the limit block 41 abuts against the first sensor 42. In this case, the main platform 31 is easily shaken because it is only supported by the main shaft 3 and the first hinge seat 2. In order to solve the above technical problem, the end of the main platform 31 away from the main shaft 3 is provided with a first compensation component 5 and a second compensation component 6. The first compensation component 5 fills the height gap between the main platform 31 and the dock, so that the main platform 31 and the dock can be stably connected. The second compensation component 6 makes up the horizontal length difference between the main platform 31 and the dock by extending, so that the main platform 31 and the dock form a smooth transition connection surface, thereby ensuring the normal operation of the roll-on / roll-off transportation operation.

[0034] Reference Figure 2 and Figure 3The bottom wall of the main platform 31 away from the end of the main shaft 3 is provided with a receiving groove 311. The receiving groove 311 is set parallel to the width direction of the main platform 31. When the inclination of the main platform 31 is a specified angle, the angle between the center line of the receiving groove 311 and the horizontal plane is a right angle. The first compensation component 5 includes a compensation plate 51 slidably connected inside the receiving groove 311. The top wall of the receiving groove 311 is provided with a moving groove (not shown in the figure). A bidirectional lead screw 52 is rotatably connected inside the moving groove. The two ends of the bidirectional lead screw 52 with opposite threads are threadedly connected to moving blocks 53 that slide with the moving groove. Each moving block 53 is hinged with a compensation rod 54. The two compensation rods 54 are distributed crosswise and the ends away from the corresponding moving blocks 53 are hinged to the compensation plate 51. A compensation motor 55 is installed on the outer surface of the main deck. The output shaft of the compensation motor 55 is coaxially fixedly connected to the bidirectional lead screw 52.

[0035] Reference Figure 2 and Figure 3 The second compensation component 6 includes a second hinge seat 61 fixedly connected to the end of the main platform 31 away from the main shaft 3. A secondary shaft (not shown in the figure) is rotatably connected inside the second hinge seat 61. A secondary platform 62 is fixedly connected to the secondary shaft. The two opposite ends of the secondary shaft extend out of the second hinge seat 61 and are coaxially fixedly connected to a connecting plate 63. A movable pin 64 is fixedly connected to the outer surface of the connecting plate 63. The axis of the movable pin 64 is parallel to the axis of the secondary shaft. A compensation cylinder 65 corresponding to the two connecting plates 63 is fixedly connected to the outer surface of the main platform 31. A sliding frame 66 is fixedly connected to the piston rod of the compensation cylinder 65. The sliding frame 66 is an L-shaped sheet metal part. A waist-shaped groove 661 is opened in the sliding frame 66 along the vertical direction. The end of the movable pin 64 extends into the waist-shaped groove 661 and slides with it.

[0036] When the first sensor 42 is triggered before the second sensor 43, it indicates that the main platform 31 has reached the specified angle but has not yet connected with the dock. The compensation motor 55 in the first compensation component 5 drives the bidirectional lead screw 52 to rotate. Under the guidance and limit of the moving groove, the bidirectional lead screw 52 drives the two moving blocks 53 to move closer to each other, thereby pushing the two compensation rods 54 to retract inward synchronously. When the compensation rods 54 retract, they drive the compensation plate 51 to move downward until it abuts against the dock surface. At this time, the compensation plate 51 and the compensation rods 54 fill the height gap between the main platform 31 and the dock, so that the main platform 31 can obtain additional support when it is not connected to the dock. Simultaneously, the two compensation cylinders 65 in the second compensation component 6 extend synchronously, and their piston rods push the sliding frame 66 to move toward the sub-platform 62. With the sliding cooperation of the waist-shaped groove 661 and the moving pin 64, the sliding frame 66 moves and pushes the moving pin 64 to move in the waist-shaped groove 661. At the same time, the moving pin 64 drives the connecting plate 63 to rotate around the sub-shaft, thereby causing the sub-platform 62 to rotate and unfold around the second hinge seat 61 until it overlaps with the surface of the dock, thus forming a continuous and complete passage for the roll-on / roll-off vehicle. At the same time, the sub-platform 62 abuts against the dock, making the entire gangway platform have more support points, further improving the stability of the gangway platform after unfolding.

[0037] Reference Figure 1 and Figure 4 A third sensor (not shown in the figure) is embedded at the bottom of the compensation block. The third sensor is a distance sensor used to measure the height between the compensation block and the dock surface. A water supply assembly 7 is provided on the hull 1. The water supply assembly 7 includes a water tank 71 fixedly installed on the hull 1. A first water pipe 72 connected to the water body is installed on the water tank 71. A first water pump 721 and a first valve 722 are installed on the first water pipe 72. In this embodiment, the first water pump 721 and the first valve 722 are both designed with bidirectional flow adaptation to realize the entry and discharge of water source inside the water tank 71.

[0038] In use, when the third sensor detects that the height difference between the main platform 31 and the dock is too large, the first valve 722 and the first water pump 721 are opened, and external water is drawn into the water tank 71 through the first water pipe 72. After the total weight of the hull 1 increases, the draft increases, thereby reducing the height difference between the main platform 31 and the dock, so that the height difference returns to the range that the first compensation component 5 can adapt to, reducing the possibility that the compensation plate 51 needs to extend excessively due to the initial height difference being too large, thus reducing the support rigidity.

[0039] Reference Figure 1 and Figure 4 The compensation block has an installation cavity 511, and a water storage tank 74 is installed inside the installation cavity 511. A second water pipe 73, which is connected to the water storage tank 74, is installed on the water tank 71. The second water pipe 73 consists of two corrugated sections and a straight section. The straight section is located inside the main platform 31. The two corrugated sections are connected on opposite sides of the straight section and are respectively connected to the water tank 71 and the water storage tank 74. In this embodiment, the second water pump 731 and the second valve 732 are both designed for bidirectional flow. After the compensation block comes into contact with the dock surface, the second valve 732 and the second water pump 731 can be opened to transport the water in the water tank 71 to the water storage tank 74. The increased weight of the water increases the positive pressure between the compensation plate 51 and the dock surface, thereby improving the support strength of the compensation block.

[0040] Reference Figure 1 , Figure 3 and Figure 4 The compensation block is provided with a reinforcing component 8, which includes a plurality of third hinge seats 81 fixedly connected to the outer periphery of the compensation block. In this embodiment, there are four third hinge seats 81. Each third hinge seat 81 is rotatably connected to a connecting shaft 82. A reinforcing plate 83 is fixedly connected to the connecting shaft 82. A sliding groove 831 is provided in the reinforcing plate 83 along its own length direction. A pressing plate 84 is slidably connected inside the sliding groove 831. The end of the pressing plate 84 extends out of the sliding groove 831 and is hinged to a support foot 85.

[0041] Reference Figure 3 and Figure 4 The compensation block is equipped with a drive assembly 9, which includes gears 91 coaxially fixedly connected to the connecting shaft 82. A rack plate 92, corresponding to each of the four gears 91, is slidably connected within the mounting cavity 511. In this embodiment, the rack plate 92 is slidably connected to the top wall of the mounting cavity 511 via a T-block and a T-slot. A drive plate 93 is slidably connected inside the mounting cavity 511. A limiting block 931, corresponding to each of the four rack plates 92, is fixedly connected to the outer periphery of the drive plate 93. A limiting groove 5111 is provided on the inner sidewall of the mounting cavity 511, which slidably engages with the limiting block 931. The sliding engagement between the limiting groove 5111 and the limiting block 931 improves the stability of the drive plate 93's movement.

[0042] Reference Figure 3 and Figure 4 The water storage tank 74 is fixedly connected to the drive plate 93. The drive plate 93 is provided with steel wire ropes 94 corresponding to the four rack plates 92. In this embodiment, the steel wire ropes 94 can be connected to the limiting block 931 by bolting. The mounting cavity 511 is rotatably connected with the reversing wheel 95 corresponding to the four steel wire ropes 94. The ends of the four steel wire ropes 94 away from the drive plate 93 pass around the corresponding reversing wheel 95 and are bolted to the corresponding rack plate 92. Each connecting shaft 82 is fitted with a torsion spring 96 on its outer surface. One end of the torsion spring 96 is fixedly connected to the third hinge seat 81, and the other end is fixedly connected to the connecting shaft 82. In the natural state of the torsion spring 96, the reinforcing plate 83 is in a vertical state that is not unfolded.

[0043] Reference Figure 3 and Figure 4The drive assembly 9 also includes an elastic bladder 97 fixedly connected to the bottom wall of the mounting cavity 511. The elastic bladder 97 stores gas inside. The surface of the elastic bladder 97 abuts against the end face of the drive plate 93 away from the water tank 74. When the water tank 74 is empty, the elastic bladder 97 is in a naturally inflated state. An air supply pipe 98 corresponding to a plurality of sliding grooves 831 is connected to the elastic bladder 97. In this embodiment, the air supply pipe 98 has a corrugated section to meet the rotational movement of the reinforcing plate 83. The air supply pipe 98 extends into the corresponding sliding groove 831 and is connected to an inflatable bladder 99. One end of the inflatable bladder 99 is fixedly connected to the bottom wall of the sliding groove 831, and the other end abuts against the clamping plate 84.

[0044] When water is injected into the water storage tank 74 through the second water pipe 73 to increase the weight of the compensation block, the weight of the water storage tank 74 increases with the increase of water volume, pushing the drive plate 93 to slide downward. When the drive plate 93 moves downward, it pulls the wire rope 94 to move downward. The wire rope 94 pulls the rack plate 92 towards the installation cavity 511 through the reversing wheel 95. When the rack plate 92 slides, it overcomes the elastic force of the torsion spring 96 and drives the meshing gear 91 to rotate. At this time, the connecting shaft 82 rotates away from the compensation block, so that the reinforcing plate 83 gradually unfolds from the vertical state to the inclined support state. Simultaneously, when the drive plate 93 moves under the gravity of the water, it compresses the elastic bladder 97. The gas inside the bladder is forced into the inflation bladder 99 through the air supply pipe 98. After the inflation bladder 99 expands, it pushes the clamping plate 84 to extend outward along the sliding groove 831. The clamping plate 84 moves and pushes the support foot 85 to press against the dock surface. At this time, the support foot 85 pressed against the dock, together with the unfolded reinforcing plate 83, forms a surrounding support frame on the outer periphery of the compensation block, which increases the foundation area of ​​the compensation block and the dock, thereby improving the support stability of the compensation block on the dock surface. Moreover, the drive component 9 combines the weight-increasing function of the water storage tank 74 with the unfolding drive of the reinforcing component 8 to realize the multiple utilization of water source.

[0045] The implementation principle of a roll-on / roll-off (Ro-Ro) vehicle gangway platform according to an embodiment of this application is as follows: During use, the piston rod of the hydraulic cylinder extends, driving the main shaft 3 to rotate the main platform 31 toward the dock. As the main shaft 3 rotates, it causes the limiting block 41 to slide within the limiting arc groove 21 toward the direction close to the first sensor 42. If the second sensor 43 is triggered before the first sensor 42, the second sensor 43 controls the hydraulic cylinder to stop moving. At this time, the inclination angle of the main platform 31 when it overlaps with the dock is less than a specified angle. If the limiting block 41 abuts against the first sensor 42 before the second sensor 43 is triggered, the first sensor 42 controls the hydraulic cylinder to stop moving. The main platform 31 stops at a designated angle, and then the first compensation component 5 fills the height gap between the main platform 31 and the dock, so that the main platform 31 and the dock can be stably connected. The second compensation component 6 extends to make up for the horizontal length difference between the main platform 31 and the dock, so that the main platform 31 and the dock form a smooth transition connection surface. The setting of the limiting component 4 keeps the tilt angle of the vehicle ramp platform within a safe threshold. At the same time, the first compensation component 5 and the second compensation component 6 work together to provide stable support for the main platform 31, ensuring the normal operation of the roll-on and roll-off transportation operation, making up for the deficiencies in the prior art.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A roll-on / roll-off (Ro-Ro) vehicle gangway platform, comprising a hull (1), wherein a first hinge seat (2) is provided on the hull (1), a main shaft (3) is rotatably connected within the first hinge seat (2), and a main platform (31) is provided on the main shaft (3), characterized in that, The hull (1) is provided with a traction member (102) that drives the main shaft (3) to rotate. The first hinge seat (2) is provided with a limiting component (4) that limits the inclination of the main platform (31) to a specified angle. The end of the main platform (31) away from the main shaft (3) is provided with a first compensation component (5) and a second compensation component (6). When the main platform (31) is at the specified angle and is not connected to the dock, the first compensation component (5) compensates for the height difference between the main platform (31) and the dock, and the second compensation component (6) compensates for the length difference between the main platform (31) and the dock.

2. The roll-on / roll-off (Ro-Ro) vehicle gangway platform according to claim 1, characterized in that, The pulling component (102) includes hydraulic cylinders hinged to opposite sides of the main platform (31). The ends of the hydraulic cylinders away from the main platform (31) are hinged to the hull (1). The outer side wall of the first hinge seat (2) has a limiting arc groove (21). The limiting component (4) includes a limiting block (41) slidably connected in the limiting arc groove (21). The inner side wall of the limiting arc groove (21) is provided with a first sensor (42). When the limiting block (41) abuts against the first sensor (42), the tilt of the main platform (31) is a specified angle. The bottom wall of the main platform (31) away from the main shaft (3) is provided with a second sensor (43).

3. The roll-on / roll-off (Ro-Ro) vehicle gangway platform according to claim 1, characterized in that, The main platform (31) is provided with a receiving groove (311). The first compensation component (5) includes a compensation plate (51) slidably connected inside the receiving groove (311). The inner side wall of the receiving groove (311) is provided with a moving groove. A bidirectional lead screw (52) is rotatably connected inside the moving groove. The two ends of the bidirectional lead screw (52) with opposite thread directions are threadedly connected to moving blocks (53) that slide with the moving groove. Each moving block (53) is hinged with a compensation rod (54). The ends of the two compensation rods (54) away from the corresponding moving block (53) are hinged to the compensation plate (51). A compensation motor (55) that drives the bidirectional lead screw (52) to rotate is provided on the outer surface of the main deck.

4. The roll-on / roll-off (Ro-Ro) vehicle gangway platform according to claim 1, characterized in that, The second compensation component (6) includes a second hinge seat (61) disposed at the end of the main platform (31). A secondary shaft is rotatably connected inside the second hinge seat (61). A secondary platform (62) is disposed on the secondary shaft. A connecting plate (63) is sleeved on the outer surface of the secondary shaft. A movable pin (64) is disposed on the connecting plate (63). A compensation cylinder (65) is disposed on the outer surface of the main platform (31). A sliding frame (66) is disposed on the piston rod of the compensation cylinder (65). A waist-shaped groove (661) is opened on the sliding frame (66) to slide and cooperate with the movable pin (64).

5. A roll-on / roll-off (Ro-Ro) ship vehicle ramp platform according to claim 3, characterized in that, The hull (1) is provided with a water supply assembly (7), which includes a water tank (71). A first water pipe (72) communicating with the water body is provided on the water tank (71). A first water pump (721) and a first valve (722) are provided on the first water pipe (72). A third sensor for detecting height is provided at the bottom of the compensation block. An installation cavity (511) is opened in the compensation block. A water storage tank (74) is provided inside the installation cavity (511). The water storage tank (74) is connected to the water tank (71) through a second water pipe (73). A second water pump (731) and a second valve (732) are provided on the second water pipe (73).

6. A roll-on / roll-off (Ro-Ro) ship vehicle ramp platform according to claim 5, characterized in that, The compensation block is provided with a reinforcing component (8), which includes a plurality of third hinge seats (81) disposed on the outer periphery of the compensation block. A connecting shaft (82) is rotatably connected to the third hinge seat (81). A reinforcing plate (83) is provided on the connecting shaft (82). A sliding groove (831) is provided in the reinforcing plate (83). A pressing plate (84) is slidably connected inside the sliding groove (831). A supporting foot (85) is hinged to the end of the pressing plate (84). A driving component (9) is provided inside the compensation block. The driving component (9) drives the connected shaft (82) to rotate in a direction away from the compensation block, and at the same time drives the supporting foot (85) to abut against the surface of the dock.

7. A roll-on / roll-off (Ro-Ro) ship vehicle ramp platform according to claim 6, characterized in that, The drive assembly (9) includes gears (91) coaxially mounted on the connecting shaft (82). A rack plate (92) corresponding to each of the gears (91) is slidably connected to the top wall of the mounting cavity (511). A drive plate (93) is slidably connected inside the mounting cavity (511). The water storage tank (74) is mounted on the drive plate (93). A wire rope (94) corresponding to each of the rack plates (92) is mounted on the drive plate (93). The mounting cavity (511) contains... A reversing wheel (95) is provided corresponding to multiple steel wire ropes (94). The ends of the multiple steel wire ropes (94) away from the drive plate (93) pass around the reversing wheel (95) and are set on the corresponding rack plate (92). A torsion spring (96) is sleeved on the outer surface of the connecting shaft (82). One end of the torsion spring (96) is set on the third hinge seat (81), and the other end is set on the connecting shaft (82). In the natural state of the torsion spring (96), the reinforcing plate (83) remains vertical.

8. A roll-on / roll-off (Ro-Ro) ship vehicle ramp platform according to claim 7, characterized in that, The drive assembly (9) further includes an elastic bladder (97) disposed on the bottom wall of the mounting cavity (511). The elastic bladder (97) abuts against the end face of the drive plate (93) away from the water tank (74). When the water tank (74) is unloaded, the elastic bladder (97) is in a naturally inflated state. An air supply pipe (98) corresponding to one of the multiple sliding grooves (831) is connected to the elastic bladder (97). The air supply pipe (98) extends into the corresponding sliding groove (831) and is connected to an air bladder (99). The air bladder (99) is disposed on the abutment plate (84).

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