A boarding ladder for preventing damage caused by ship shaking

Abstract

The present invention relates to the technical field of marine equipment, and discloses a boarding ladder for preventing damage caused by the shaking of a ship, which includes a mobile platform, an inclined ladder, an adjusting component and a connecting platform. One end of the inclined ladder is rotatably connected to the mobile platform, and the adjusting component is used to control the inclination angle of the inclined ladder. The other end of the inclined ladder is provided with a boarding platform, which includes a ladder board fixed at the end of the inclined ladder, a pedal rotatably connected to the ladder board through a driving shaft, a bottom board located on the connecting platform, and side boards symmetrically arranged on both sides of the bottom board through a rotating axis; a shock absorption unit is arranged between the side board and the pedal, and the shock absorption unit includes a connecting frame fixed at the bottom end of the pedal and a pull rod symmetrically arranged and rotatably connected to the connecting frame. For the boarding ladder for preventing damage caused by the shaking of a ship, by arranging the shock absorption unit, when the ship sways left and right and moves up and down under the influence of wind and waves or water level changes, the air floating spring utilizes the compressibility of gas to effectively weaken the shaking amplitude of the pedal.

Description

Technical Field

[0001] The present invention relates to the technical field of marine equipment, and in particular to a boarding ladder capable of preventing damage caused by shaking of a ship. Background Art

[0002] A boarding ladder is an important piece of equipment for the safe passage of personnel between ships and docks. It is usually securely docked with the ship through a dedicated connection structure on the edge of the ship's deck. Its connection methods include fixed slots, bolt assemblies or hook-type devices, which can be adapted to different ship structures to ensure that the boarding ladder is tightly integrated with the deck when the ship is docked. When the boarding ladder is correctly installed, personnel can smoothly board the ship from the dock or shore through its non-slip steps and handrails. During the process, the handrails and anti-slip design on both sides of the ladder body ensure safety.

[0003] The existing publication number CN113619736A discloses a boarding ladder for marine engineering ships, including a base, an anti-slip seat, a rectangular ladder beam, a step device, a handrail, and a hook. The anti-slip seat is fixed at the bottom of the base and close to the edge. The rectangular ladder beam is rotatably connected to the top of the base and is located in the center. The step device is arranged between the corresponding two sides of the inner wall of the rectangular ladder beam. The step device is evenly distributed between the corresponding two sides of the inner wall of the rectangular ladder beam. The handrail is fixed at the corresponding two sides of the top of the rectangular ladder beam. The hook is fixed at the corresponding position of the end of the rectangular ladder beam and away from the side of the base. Although the above technical solution can be adjusted by adjusting the angle of the rectangular ladder beam and using the hook to buckle it on the edge of the ship, it is not easily affected by bad weather. Water on the surface of the boarding ladder and the bottom of the crew's feet can be cleaned in time, which has the advantage of improving performance.

[0004] In the prior art, boarding ladders are usually rigidly connected to the ship through fixed slots, bolt assemblies or hook-type devices on the edge of the ship's deck. Although this type of connection method can ensure the stability of the boarding ladder under static conditions, when the ship is affected by wind and waves or the water level changes and causes the ship to bump, the relative displacement between the ship and the dock will cause the rigidly connected boarding ladder to be subjected to dynamic stress. Since traditional boarding ladders lack dynamic buffer devices, they cannot effectively alleviate the impact of the ship's movement on the ladder structure, resulting in concentrated accumulation of stress at the connection part. This stress concentration may cause the boarding ladder to be unable to adapt to the shaking of the ship and become tilted or partially deformed, reducing the supporting stability of the anti-slip steps and handrails, and increasing the risk of people slipping or falling. Moreover, when the stress exceeds the design threshold of the connection structure, it may cause the slot to loosen, the bolt to break or the hook to fall off, causing the boarding ladder to detach from the ship as a whole, posing a serious safety hazard. Therefore, there is an urgent need for a boarding ladder that can prevent damage from ship shaking to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a boarding ladder that prevents damage caused by the shaking of a ship, so as to solve the problem in the above-mentioned background technology that the existing boarding ladder lacks a dynamic buffer device and cannot relieve the impact of the ship's movement on the ladder structure, exacerbating structural damage.

[0006] A boarding ladder that prevents damage caused by the shaking of a ship provided by the present invention adopts the following technical solutions:

[0007] A boarding ladder that prevents damage caused by the shaking of a ship includes a mobile platform, an inclined ladder, an adjustment component and a connection platform. One end of the inclined ladder is rotatably connected to the mobile platform, and the adjustment component is used to control the inclination angle of the inclined ladder. The other end of the inclined ladder is provided with a boarding platform, and the boarding platform includes a ladder board fixed at the end of the inclined ladder, a pedal rotatably connected to the ladder board through a driving shaft, a bottom board located on the connection platform, and side boards symmetrically arranged on both sides of the bottom board through a rotation axis;

[0008] A shock absorption unit is provided between the side board and the pedal. The shock absorption unit includes a connection frame fixed at the bottom end of the pedal and pull rods symmetrically arranged and rotatably connected to the connection frame. A connection shaft is fixed at the end of the pull rod far from the connection frame. An articulating arm is rotatably connected to the side board, and an elastic element is connected between the articulating arm and the connection shaft. Dampers hinged to the bottom board are symmetrically arranged on both sides of the connection frame, and damping springs are provided on the dampers. When the ship shakes, the articulating arm swings with the side board, and the elastic element is used to offset the vibration of the pedal.

[0009] Further, the elastic element includes an air-floating spring, the air-floating spring is arranged at the connection between the connection shaft and the end of the articulating arm, and transmission shafts are installed at both ends of the air-floating spring and are respectively rotatably connected to the connection frame and the connection shaft.

[0010] [[ID=l5]]Further, vertical rods are symmetrically arranged at the bottom end of the connection frame, and buffer units are symmetrically arranged between the vertical rods and the side board;

[0011] The buffer unit includes a buffer and a buffer spring arranged on the buffer. A bracket for connecting the buffer is fixed on the side board, and the buffer is rotatably connected to the vertical rod and the bracket respectively through a universal shaft.

[0012] Further, a cross bar is fixed between the vertical rods, and multiple groups of air bags for buffering are arranged between the cross bar and the bottom board.

[0013] Further, the side board is connected to the connection platform through multiple groups of detachable connectors. Activity slots corresponding to the number of connectors are opened on the side board, rubber plugs are fixed in the activity slots, and through holes for the connectors to pass through are opened on the rubber plugs.

[0014] Further, flanging structures in contact with the outer walls of the edges of the activity slots are arranged on both the upper and lower edges of the rubber plug.

[0015] Furthermore, the bottom ends of the bottom plate and the side plates are each provided with a buffer pad that is in frictional contact with the upper surface of the connecting platform.

[0016] Furthermore, the upper surfaces of the ladder plate and the pedals are provided with anti-skid pads, and the upper surfaces of the anti-skid pads are designed to be wavy.

[0017] Furthermore, a retractable protective cover is provided between the pedal and the bottom plate and the side plate, the top of the protective cover is fixed to the edge of the lower surface of the pedal, and the bottom of the protective cover is fixed to the edge of the upper surface of the bottom plate and the side plate.

[0018] Furthermore, an auxiliary unit is provided between the two sides of the pedal and the side walls of the inclined ladder, and the auxiliary unit includes a connecting frame symmetrically fixed on the two side walls of the inclined ladder, and a first connecting column is rotatably connected to the connecting frame, and a second connecting column is rotatably connected to the two sides of the pedal, and an air spring is fixedly connected between the second connecting column and the first connecting column.

[0019] Beneficial effects of the present invention:

[0020] 1. By providing a shock-absorbing unit and a buffer unit, when the ship is affected by wind and waves or the water level changes and sways left and right and moves up and down, the displacement of the side panel drives the connecting arm, which pulls the connecting shaft and drives the pull rod through the air floating spring to displace the pedal. The air floating spring uses the compressibility of gas to store energy when the ship rises and falls and release energy when it falls back, effectively reducing the amplitude of the pedal shaking and reducing the risk of people slipping. At the same time, the damper and the damping spring work together to consume the energy of the pedal shaking and prevent it from resetting too quickly, ensuring that the pedal is stable. When the ship is affected by wind and waves or the water level changes and moves back and forth, the buffer flexibly adapts to the angle change between the vertical rod and the side panel through the universal shaft. The buffer spring absorbs the energy generated by the displacement of the pedal relative to the side panel, suppressing excessive swing of the pedal. The air bag between the cross bar and the bottom plate is compressed or stretched when the ship is bumpy, further buffering the pedal shaking.

[0021] 2. By setting up an auxiliary unit, when the ship shakes violently and the pedals rotate frequently, the driving shaft will be subjected to a large torque, which may easily cause wear, deformation or even breakage of the driving shaft during long-term use. The air spring in the auxiliary unit disperses part of the torque through its own buffering effect during the rotation of the pedals, providing support and buffering for the pedals from the side, reducing the burden on the driving shaft, ensuring the normal service life of the driving shaft, and thereby improving the stability of the boarding platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a side structural schematic diagram of the present invention;

[0024] Figure 3 Schematic diagram of the three-dimensional structure at the boarding platform of the present invention;

[0025] Figure 4 Schematic diagram of the cross-sectional three-dimensional structure of the bottom plate, side plate and rotating shaft of the present invention;

[0026] Figure 5 Schematic diagram of the three-dimensional structure of the pedal, bottom plate, side plate, buffer pad and shock absorption unit of the present invention;

[0027] Figure 6 Schematic diagram of the three-dimensional structure of the bottom plate, side plate and shock absorption unit in the figure of the present invention;

[0028] Figure 7 Schematic diagram of the three-dimensional structure of the connection frame, pull rod, connection shaft, connecting arm and air floating spring of the present invention;

[0029] Figure 8 Schematic diagram of the three-dimensional structure of the connection frame, vertical rod, buffer unit and side plate in the figure of the present invention;

[0030] Figure 9 Exploded schematic diagram of the three-dimensional structure of the side plate, connecting piece and rubber plug of the present invention;

[0031] Figure 10 Schematic diagram of the three-dimensional structure of the inclined ladder, ladder board, pedal, driving shaft and auxiliary unit of the present invention;

[0032] Figure 11 Schematic diagram of the three-dimensional structure of the pedal, bottom plate, side plate and protective cover of the present invention.

[0033] In the figure:

[0034] 1. Mobile platform; 2. Inclined ladder; 3. Adjusting component; 4. Connection platform; 5. Boarding platform; 51. Ladder board; 52. Pedal; 53. Driving shaft;  54. Bottom plate; 55. Side plate; 551. Connecting piece; 552. Activity groove; 553. Rubber plug; 554. Opening; 555. Flanging structure; 56. Rotating shaft; 57. Buffer pad; 58. Anti-slip pad; 59. Protective cover; 6. Shock absorption unit; 61. Connection frame; 611. Vertical rod; 612. Cross rod; 613. Airbag; 62. Pull rod; 63. Connection shaft; 64. Connecting arm; 65. Air floating spring; 66. Transmission shaft; 67. Damper; 68. Damper spring; 7. Buffer unit; 71. Buffer; 72. Buffer spring; 73. Bracket; 74. Universal shaft; 8. Auxiliary unit; 81. Connection frame; 82. First connecting column; 83. Second connecting column; 84. Air spring. Detailed implementation manners

[0035] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given in conjunction with the accompanying drawings of the specification.

[0036] Referring to Figures 1 - 2 , a boarding ladder for preventing a ship from shaking and being damaged provided by the present invention includes a moving platform 1, an inclined ladder 2, an adjusting assembly 3, and a connecting platform 4. One end of the inclined ladder 2 is rotatably connected to the moving platform 1, and the adjusting assembly 3 is used to control the inclination angle of the inclined ladder 2.

[0037] Referring to Figures 2 - 4 , a boarding platform 5 is provided at the other end of the inclined ladder 2. The boarding platform 5 includes a ladder board 51 fixed to the end of the inclined ladder 2, a pedal 52 rotatably connected to the ladder board 51 through a driving shaft 53, a bottom plate 54 located on the connecting platform 4, and side plates 55 symmetrically arranged on both sides of the bottom plate 54 through a rotating shaft 56.

[0038] Referring to Figures 5 - 7 , a shock absorption unit 6 is provided between the side plate 55 and the pedal 52. The shock absorption unit 6 includes a connecting frame 61 fixed to the bottom end of the pedal 52 and a pull rod 62 symmetrically arranged and rotatably connected to the connecting frame 61. A connecting shaft 63 is fixed to the end of the pull rod 62 away from the connecting frame 61. An articulating arm 64 is rotatably connected to the side plate 55 through a rotating shaft. Among them, the articulating arm 64 and the connecting shaft 63 are connected through an elastic element. Specifically, the elastic element includes an air-floating spring 65. The air-floating spring 65 is arranged at the connection between the connecting shaft 63 and the end of the articulating arm 64. Transmission shafts 66 are installed at both ends of the air-floating spring 65, and the transmission shafts 66 are respectively rotatably connected to the connecting frame 61 and the connecting shaft 63.

[0039] It should be noted that when the ship sways left and right and moves up and down due to the influence of wind and waves or changes in water level, in addition to moving left and right with the ship, the bottom plate 54 and the side plate 55 will also move up and down with the ship. At this time, the connecting arm 64 rotatably connected to the side plate 55 will change its position due to the displacement of the side plate 55. Since the end of the connecting arm 64 is connected to the connecting shaft 63 through the air-floating spring 65, and the connecting shaft 63 is fixed to the pull rod 62 which is symmetrically arranged and rotatably connected to the connecting frame 61. When the side plate 55 moves with the ship's swaying, the connecting arm 64 pulls the connecting shaft 63, and the connecting shaft 63 drives the pull rod 62 to move. And the pull rod 62 is rotatably connected to the connecting frame 61 fixed to the bottom end of the pedal 52, so that the pedal 52 generates a corresponding displacement. In this process, the air-floating spring 65 utilizes the compressibility of the gas. When it is impacted by an external force, the gas inside it is compressed and stores energy. For example, when the ship rises and falls, the side plate 55 drives the connecting arm 64 to move upward, and the connecting shaft 63 generates a pressure on the air-floating spring 65. The air-floating spring 65 is compressed, and the kinetic energy brought by the ship's rise is converted into the elastic potential energy of the gas and stored. When the ship falls back down, the air-floating spring 65 slowly releases energy, pushing components such as the connecting shaft 63 and the pull rod 62 to reset, slowing down the falling speed of the pedal 52. This process effectively weakens the swaying amplitude of the pedal 52, avoids the violent swaying of the pedal 52 caused by the ship's movement, reduces the risk of personnel slipping or falling, and compared with the rigid connection of the traditional boarding ladder, it avoids the excessive concentration of stress at the connection part, preventing the boarding ladder from tilting or undergoing local deformation due to its inability to adapt to the ship's swaying.

[0040] Among them, referring to Figure 6 , dampers 67 hinged to the bottom plate 54 are symmetrically arranged on both sides of the connecting frame 61. One end of the damper 67 far from the bottom plate 54 is hinged to the connecting frame 61. The damper 67 mainly includes a cylinder block, a piston rod, a damping medium and a piston. A damping spring 68 is provided on the damper 67. The piston rod of the damper 67 moves relative to the cylinder barrel, and the damping spring 68 deforms to generate a damping force. The damping force consumes the energy of the swaying of the pedal 52, further suppressing the swaying of the pedal 52. For example, during the process of the air-floating spring 65 releasing energy to push the pedal 52 to reset, the damper 67 generates a reverse damping force through the damping spring 68, avoiding the excessive swaying caused by the too fast reset speed of the pedal 52 and ensuring that the pedal 52 smoothly returns to a relatively stable position. The damper 67 and the air-floating spring 65 work together. The air-floating spring 65 is responsible for absorbing most of the impact energy brought by the ship's swaying and undulating, and the damper 67 is used to control the swaying speed of the pedal 52, making it reset smoothly and avoiding long-term oscillation, providing a safe and stable platform for personnel to board the ship.

[0041] When the ship is in a stable state, the shock absorption unit 6 supports the boarding platform 5. When the ship sways due to wind, waves or water level changes, the connecting arm 64 swings with the side plate 55, and the elastic element compresses or stretches, absorbing and buffering the impact force brought by the ship's sway, offsetting the vibration of the pedal 52. At the same time, the damper 67 and the damping spring 68 cooperate to suppress excessive sway of the boarding platform 5.

[0042] Referring to Figure 6 , vertical rods 611 are symmetrically arranged at the bottom end of the connecting frame 61. A cross bar 612 is fixed between the vertical rods 611. A plurality of air bags 613 for buffering are arranged between the cross bar 612 and the bottom plate 54. The air bags 613 are between the cross bar 612 and the bottom plate 54 and will be compressed or stretched as the relative positions of the two change. When the ship bumps upward, the bottom plate 54 moves upward closer to the cross bar 612, and the air bags 613 are compressed. When the ship falls back, the air bags 613 release energy, pushing the cross bar 612 and the pedal 52 connected thereto to reset smoothly, further buffering the sway of the pedal 52 and reducing its displacement amplitude.

[0043] Further, referring to Figure 8 , buffer units 7 are symmetrically arranged between the vertical rods 611 and the side plates 55. The buffer unit 7 includes a buffer 71 and a buffer spring 72 provided on the buffer 71. A bracket 73 for connecting the buffer 71 is fixed on the side plate 55. The buffer 71 is rotatably connected to the vertical rod 611 and the bracket 73 respectively through a universal shaft 74. The buffer 71 mainly includes a cylinder block, a piston rod, a damping medium and a piston. When the ship sways and causes the pedal 52 to displace, the buffer unit 7 can further buffer. The buffer spring 72 absorbs vibration energy, and the universal shaft 74 ensures that the buffer 71 can effectively play its role in different directions.

[0044] It should be noted that when the ship is affected by wind and waves or the water level changes and shows a pitching motion, during this process, the pedal 52, the bottom plate 54 and the side plate 55 generate displacements as the ship sways. At this time, the connecting arm 64 rotates around its rotation axis with the side plate 55, and the bottom plate 54 rotates around the rotation axis 56 due to the pulling of the connecting arm 64, so that the pedal 52 drives the vertical rod 611 to generate a displacement relative to the side plate 55 through the connecting frame 61. At this time, the buffer 71 flexibly adapts to the change in the angle between the vertical rod 611 and the side plate 55 through the universal joint 74. No matter how the angle between the two changes due to the pitching of the ship, the buffer 71 can be effectively connected and work. The buffer spring 72 compresses or extends under the action of the buffer 71, further absorbing the energy generated by the displacement of the pedal 52 relative to the side plate 55. For example, when the ship pitches forward, the pedal 52 tilts forward accordingly, the connecting frame 61 drives the vertical rod 611 to move forward and downward, the piston rod of the buffer 71 retracts in the cylinder, and the buffer spring 72 is compressed. When the ship falls backward, the pedal 52 swings back, the buffer spring 72 releases energy, pushes the piston rod of the buffer 71 to extend, and inhibits the excessive backswing of the pedal 52, so that the pedal 52 remains stable when the ship sways.

[0045] Among them, referring to Figure 9 , the side plate 55 is connected to the connecting platform 4 through multiple groups of detachable connectors 551. The connectors 551 can be bolts. The connecting platform 4 is provided with screw holes adapted to the connectors 551. The side plate 55 is provided with movable grooves 552 corresponding to the number of the connectors 551. A rubber plug 553 is fixed in the movable groove 552. The rubber plug 553 is provided with an opening 554 for the connector 551 to pass through. When the ship is bumpy due to the influence of wind and waves or water level changes, the side plate 55 will generate a displacement accordingly. At this time, the movable groove 552 provides a certain amount of movable space for the connector 551. During the displacement process of the side plate 55, the connector 551 can move within a small range in the movable groove 552. When the connector 551 moves in the movable groove 552, the rubber plug 553 can undergo a certain degree of elastic deformation, absorb the vibration energy generated by the displacement, and play a buffering effect, avoiding excessive rigid stress between the side plate 55 and the connecting platform 4 caused by the ship's swaying.

[0046] Furthermore, flanging structures 555 that contact the outer walls of the edges of the movable groove 552 are arranged on both the upper and lower edges of the rubber plug 553. The flanging structures 555 enhance the connection stability between the rubber plug 553 and the movable groove 552, prevent the rubber plug 553 from being disengaged from the movable groove 552 during the buffering process of the rubber plug 553, and further improve the buffering effect.

[0047] Referring to Figure 5The bottom ends of the bottom plate 54 and the side plates 55 are both provided with buffer pads 57 that are in frictional contact with the upper surface of the connecting platform 4. During the installation and use of the boarding ladder, the buffer pads 57 play a shock-absorbing and anti-slip role, reducing the wear caused by vibration between the bottom plate 54 and the side plates 55 and the connecting platform 4, and enhancing the overall stability of the boarding ladder.

[0048] Reference Figure 10 The upper surfaces of the ladder 51 and the pedal 52 are provided with anti-slip pads 58. The upper surface of the anti-slip pads 58 is designed in a wavy shape. The wavy anti-slip pads 58 can effectively increase the friction between the soles of shoes and the ladder 51 and the pedal 52 to prevent boarders from slipping.

[0049] Reference Figure 11 A retractable protective cover 59 is provided between the pedal 52 and the bottom plate 54 and the side plate 55. The top of the protective cover 59 is fixed to the edge of the lower surface of the pedal 52, and the bottom of the protective cover 59 is fixed to the edge of the upper surface of the bottom plate 54 and the side plate 55. When the pedal 52 and the bottom plate 54 and the side plate 55 move relative to each other, the retractable protective cover 59 can cover the gap between the pedal 52 and the bottom plate 54 and the side plate 55 to play a waterproof role, while preventing debris from entering and preventing it from scratching and wearing the shock absorbing unit 6 and the buffer unit 7.

[0050] The buffer pad 57 , the anti-slip pad 58 and the protective cover 59 may all be made of rubber.

[0051] Further, refer to Figure 10 An auxiliary unit 8 is provided between the two sides of the pedal 52 and the side walls of the inclined ladder 2. The auxiliary unit 8 includes a connecting frame 81 symmetrically fixed on the two side walls of the inclined ladder 2. The connecting frame 81 is rotatably connected to the first connecting column 82 through a rotating shaft. The two sides of the pedal 52 are rotatably connected to the second connecting column 83 through a rotating shaft. An air spring 84 is fixedly connected between the second connecting column 83 and the first connecting column 82. When the pedal 52 rotates, the air spring 84 of the auxiliary unit 8 buffers the torsion of the driving shaft 53 to avoid damage to the driving shaft 53 due to excessive torsion, provides support and buffering for the pedal 52 from the side, reduces the burden on the driving shaft 53, and ensures the normal service life of the driving shaft 53.

[0052] The working principle of the boarding ladder provided by the present invention for preventing damage caused by ship sway is as follows: when the inclined ladder 2 needs to be connected to the ship, the inclination angle of the inclined ladder 2 is first controlled by the adjustment component 3 so that the inclined ladder 2 adapts to the ship to be connected. Then, the bottom plate 54 and the side plates 55 are placed on the connecting platform 4 and connected to the connecting platform 4 via multiple groups of connecting members 551. The connecting platform 4 is provided with threaded grooves that are compatible with the connecting members 551. After the inclined ladder 2 is connected to the connecting platform 4, when the ship is in a stable state, the shock absorbing unit 6, the buffer unit 7, the auxiliary unit 8 and other components are relatively stationary.

[0053] When dealing with the situation where the ship sways from side to side and moves up and down, the bottom plate 54 and the side plate 55 move along with the ship. At this time, the connecting arm 64 rotatably connected to the side plate 55 changes its position accordingly. The connecting arm 64 pulls the connecting shaft 63, and the connecting shaft 63 drives the pull rod 62, causing the pedal 52 to have a corresponding displacement. At this time, the air-floating spring 65 utilizes the compressibility of the gas. When the ship moves upward and the side plate 55 drives the connecting arm 64 to move upward, the connecting shaft 63 presses on the air-floating spring 65 to compress it, converting the upward kinetic energy of the ship into elastic potential energy of the gas for storage. When the ship moves downward, the air-floating spring 65 slowly releases energy, pushing components such as the connecting shaft 63 and the pull rod 62 to reset, slowing down the falling speed of the pedal 52 and weakening the swaying amplitude of the pedal 52. At the same time, the dampers 67 rotatably connected to the bottom plate 54 on both sides of the connecting frame 61 work in coordination with the damping springs 68. The piston rod of the damper 67 moves relative to the cylinder barrel, and the damping spring 68 deforms to generate a damping force, consuming the swaying energy of the pedal 52. Especially during the process of the air-floating spring 65 releasing energy to push the pedal 52 to reset, the damper 67 generates a reverse damping force through the damping spring 68 to prevent the pedal 52 from resetting too quickly and causing excessive swaying, so that the pedal 52 returns to a relatively stable position;

[0054] When the ship jolts up and down, multiple air bags 613 are compressed or stretched as the relative positions of the bottom plate 54 and the cross bar 612 change, further buffering the swaying of the pedal 52;

[0055] When the ship presents a pitching motion, the pedal 52, the bottom plate 54, and the side plate 55 generate displacements as the ship sways. At this time, the connecting arm 64 rotates around its rotation axis with the side plate 55, and the bottom plate 54 rotates around the rotation shaft 56 due to the pulling of the connecting arm 64. At this time, the buffer 71 adapts to the angle change between the vertical rod 611 and the side plate 55 through the universal joint 74, and the buffer spring 72 compresses or extends, absorbing the energy generated by the relative displacement of the pedal 52 with respect to the side plate 55, inhibiting the excessive backward swing of the pedal 52, and keeping the pedal 52 stable;

[0056] When the ship's jolting causes the side plate 55 to displace, the movable groove 552 provides a movable space for the connecting piece 551, and the rubber plug 553 undergoes elastic deformation, absorbing the vibration energy generated by the displacement, and preventing excessive rigid stress from being generated between the side plate 55 and the connecting platform 4. For the auxiliary unit 8 between the two sides of the pedal 52 and the side wall of the inclined ladder 2, its air spring 84 buffers the torque received by the driving shaft 53 when the pedal 52 rotates, providing support and buffering for the pedal 52 from the side and reducing the burden on the driving shaft 53.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A boarding ladder for preventing damage caused by ship swaying, comprising a mobile platform, an inclined ladder, an adjustment assembly, and a connecting platform. One end of the inclined ladder is rotatably connected to the mobile platform, and the adjustment assembly is used to control the inclination angle of the inclined ladder. The characteristics are: The other end of the inclined ladder is provided with a boarding platform, which includes a ladder board fixed at the end of the inclined ladder, a pedal rotatably connected to the ladder board through a driving shaft, a bottom board located on the connecting platform, and side boards symmetrically arranged on both sides of the bottom board through a rotating axis; A shock absorption unit is arranged between the side board and the pedal. The shock absorption unit includes a connecting frame fixed at the bottom end of the pedal and pull rods symmetrically arranged and rotatably connected to the connecting frame. A connecting shaft is fixed at one end of the pull rod far away from the connecting frame. An articulated arm is rotatably connected to the side board. The articulated arm and the connecting shaft are connected through an elastic element. Dampers hinged to the bottom board are symmetrically arranged on both sides of the connecting frame. A damping spring is arranged on the damper. When the ship sways, the articulated arm swings along with the side board, and the elastic element is used to offset the vibration of the pedal; Vertical rods are symmetrically arranged at the bottom end of the connecting frame, and buffer units are symmetrically arranged between the vertical rods and the side board; The buffer unit includes a buffer and a buffer spring arranged on the buffer. A bracket for connecting the buffer is fixed on the side board. The buffer is rotatably connected to the vertical rod and the bracket through a universal shaft respectively; A cross bar is fixed between the vertical rods, and multiple groups of air bags for buffering are arranged between the cross bar and the bottom board; An auxiliary unit is arranged between the two sides of the pedal and the side wall of the inclined ladder. The auxiliary unit includes connecting frames symmetrically fixed on the two side walls of the inclined ladder. A first articulated column is rotatably connected to the connecting frame. A second articulated column is rotatably connected to both sides of the pedal. An air spring is fixedly connected between the second articulated column and the first articulated column.

2. The boarding ladder for preventing damage caused by the rocking of a ship according to claim 1, characterized in that: The elastic element includes an air floating spring. The air floating spring is arranged at the connection between the connecting shaft and the end of the articulated arm. Transmission shafts are installed at both ends of the air floating spring and are rotatably connected to the connecting frame and the connecting shaft respectively.

3. The boarding ladder for preventing damage caused by the rocking of a ship according to claim 1, characterized in that: The side board is connected to the connecting platform through multiple groups of detachable connectors. Activity grooves corresponding to the number of connectors are opened on the side board. Rubber plugs are fixed in the activity grooves, and through holes for the connectors to pass through are opened on the rubber plugs.

4. The boarding ladder for preventing damage caused by ship swaying according to claim 3, characterized in that: Flanging structures in contact with the outer walls of the edges of the activity grooves are arranged on both the upper and lower edges of the rubber plug.

5. The boarding ladder for preventing damage caused by ship swaying according to claim 1, characterized in that: Buffer pads in frictional contact with the upper surface of the connecting platform are arranged at the bottom ends of the bottom board and the side board.

6. The boarding ladder for preventing damage caused by ship swaying according to claim 1, wherein: Anti-slip pads are arranged on the upper surfaces of the ladder board and the pedal, and the upper surface of the anti-slip pad is designed in a wavy shape.

7. The boarding ladder for preventing damage caused by ship swaying according to claim 1, characterized in that: A retractable protective cover is arranged between the pedal and the bottom board and the side board. The top of the protective cover is fixed to the edge of the lower surface of the pedal, and the bottom of the protective cover is fixed to the edge of the upper surfaces of the bottom board and the side board.

Images