Boarding ladder capable of preventing ship from being damaged due to shaking

Abstract

The invention relates to the technical field of marine equipment, and discloses a boarding ladder capable of preventing a ship from shaking and being damaged, the boarding ladder comprises a moving platform, an inclined ladder, an adjusting assembly and a connecting platform, one end of the inclined ladder is rotatably connected with the moving platform, the adjusting assembly is used for controlling the inclination angle of the inclined ladder, and the other end of the inclined ladder is provided with a boarding platform; the boarding platform comprises a ladder plate fixed to the end of the inclined ladder, a pedal rotationally connected with the ladder plate through a driving shaft, a bottom plate located on the connecting platform and side plates symmetrically arranged on the two sides of the bottom plate through a rotating shaft. A damping unit is arranged between the side plate and the pedal and comprises a connecting frame fixed to the bottom end of the pedal and pull rods which are symmetrically arranged and rotationally connected with the connecting frame. According to the boarding ladder capable of preventing the ship from waggling and being damaged, by arranging the damping unit, when the ship is affected by stormy waves or changes in water level and swings left and right and fluctuates up and down, the air floating spring effectively weakens the waggling amplitude of the pedal through the compressibility of air.

Description

Technical Field

[0001] The invention relates to the technical field of ship equipment, and in particular to a boarding ladder capable of preventing the ship from being damaged by shaking. Background Art

[0002] The boarding ladder is an important equipment for the safe passage of personnel between the ship and the dock. It is usually firmly docked with the ship through a special 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 are relied on to ensure travel 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 two corresponding sides of the inner wall of the rectangular ladder beam, the step device is evenly distributed between the two corresponding sides of the inner wall of the rectangular ladder beam, the handrail is fixed to the two corresponding sides of the top of the rectangular ladder beam, and the hook is fixed to 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 on the edge of the ship, it is not easily affected by bad weather, and the accumulated 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 the performance of use.

[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 the traditional boarding ladder lacks a dynamic buffer device, it cannot effectively alleviate the impact of the ship's movement on the ladder structure, resulting in concentrated accumulation of stress at the connection position. 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, the slot may loosen, the bolt may break or the hook may 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 caused by ship shaking to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a boarding ladder that prevents damage caused by ship shaking, so as to solve the problem that the existing boarding ladder proposed in the above background technology lacks a dynamic buffer device, cannot alleviate the impact of ship movement on the ladder structure, and aggravates structural damage.

[0006] The present invention provides a boarding ladder for preventing damage caused by the shaking of a ship, which adopts the following technical solution: A boarding ladder for preventing a ship from being damaged by shaking, comprising a moving platform, an inclined ladder, an adjustment assembly and a connecting platform, one end of the inclined ladder being rotatably connected to the moving platform, the adjustment assembly being used to control the inclination angle of the inclined ladder, the other end of the inclined ladder being provided with a boarding platform, the boarding platform comprising a ladder plate fixed to the end of the inclined ladder, a pedal rotatably connected to the ladder plate through a driving shaft, a bottom plate located on the connecting platform and side plates symmetrically arranged on both sides of the bottom plate through a rotation axis; A shock absorbing unit is provided between the side panel and the pedal, and the shock absorbing 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, a connecting shaft is fixed to the end of the pull rod away from the connecting frame, a connecting arm is rotatably connected to the side panel, wherein the connecting arm is connected to the connecting shaft by an elastic element, dampers hinged to the bottom plate are symmetrically arranged on both sides of the connecting frame, and a damping spring is provided on the damper. When the ship shakes, the connecting arm swings with the side panel, and the elastic element is used to offset the vibration of the pedal.

[0007] Furthermore, the elastic element includes an air floating spring, which is arranged at the connection between the connecting shaft and the end of the connecting arm. Transmission shafts are installed at both ends of the air floating spring, and the transmission shafts are rotatably connected to the connecting frame and the connecting shaft respectively.

[0008] Furthermore, 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 plates; The buffer unit comprises a buffer and a buffer spring arranged on the buffer, a bracket for connecting the buffer is fixed on the side plate, and the buffer is rotatably connected to the vertical rod and the bracket respectively through a universal shaft.

[0009] Furthermore, a cross bar is fixed between the vertical bars, and a plurality of groups of air bags for cushioning are arranged between the cross bar and the bottom plate.

[0010] Furthermore, the side panels are connected to the connection platform via a plurality of groups of detachable connectors, the side panels are provided with movable grooves corresponding to the number of connectors, rubber plugs are fixed in the movable grooves, and the rubber plugs are provided with openings for the connectors to pass through.

[0011] Furthermore, the upper and lower edges of the rubber stopper are both provided with flange structures that are in contact with the edge outer wall of the movable groove.

[0012] Furthermore, the bottom ends of the bottom plate and the side plates are both provided with buffer pads which are in frictional contact with the upper surface of the connecting platform.

[0013] Furthermore, the upper surfaces of the ladder board and the pedal are provided with anti-skid pads, and the upper surfaces of the anti-skid pads are designed in a wavy shape.

[0014] Furthermore, a retractable protective cover is provided between the pedal, 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.

[0015] 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.

[0016] Beneficial effects of the present invention: 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 presents a left-right sway and up-and-down movement, the displacement of the side panel drives the connecting arm, and the connecting shaft is pulled by the air floating spring to drive the pull rod, so that the pedal is displaced. The air floating spring utilizes the compressibility of gas to store energy when the ship rises and falls and release energy when it falls back, effectively weakening the swing amplitude of the pedal and reducing the risk of personnel slipping. At the same time, the damper and the damping spring work together to consume the energy of the pedal swing 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 presents a forward and backward fluctuation movement, 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, suppresses excessive swing of the pedal, and the air bag between the cross bar and the bottom plate is compressed or stretched when the ship is bumpy, further buffering the swing of the pedal.

[0017] 2. By setting up an auxiliary unit, when the ship shakes violently and the pedal rotates frequently, the driving shaft will be subjected to a large torque, which may easily lead to wear, deformation or even breakage of the driving shaft due to long-term use. During the rotation of the pedal, the air spring in the auxiliary unit disperses part of the torque through its own buffering effect, provides support and buffering for the pedal from the side, reduces the burden on the driving shaft, ensures the normal service life of the driving shaft, and thus improves the stability of the boarding platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the boarding platform of the present invention; Figure 4It is a cross-sectional schematic diagram of the three-dimensional structure of the bottom plate, side plate and rotating shaft of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the pedal, bottom plate, side plate, buffer pad and shock absorbing unit of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the bottom plate, side plate and shock absorbing unit in the figure of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the connection frame, the pull rod, the connection shaft, the connection arm and the air floating spring of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the connection frame, vertical rods, buffer units and side panels in the figure of the present invention; Fig. 9 It is an exploded schematic diagram of the three-dimensional structure of the side plate, the connecting piece and the rubber plug of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the inclined ladder, ladder board, pedal, driving shaft and auxiliary unit of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the pedal, bottom plate, side plate and protective cover of the present invention.

[0019] In the figure: 1. Mobile platform; 2. Inclined ladder; 3. Adjustment assembly; 4. Connecting platform; 5. Boarding platform; 51. Ladder plate; 52. Pedal; 53. Active shaft; 54. Bottom plate; 55. Side plate; 551. Connector; 552. Movable groove; 553. Rubber plug; 554. Opening; 555. Flanging structure; 56. Rotating shaft; 57. Buffer pad; 58. Anti-skid pad; 59. Protective cover; 6. Shock-absorbing unit; 61. Connecting frame; 611. vertical rod; 612. cross rod; 613. airbag; 62. pull rod; 63. connecting shaft; 64. connecting arm; 65. air spring; 66. transmission shaft; 67. damper; 68. damping spring; 7. buffer unit; 71. buffer; 72. buffer spring; 73. bracket; 74. universal shaft; 8. auxiliary unit; 81. connecting frame; 82. first connecting column; 83. second connecting column; 84. air spring. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] Reference Figure 1-Figure 2 The present invention provides a boarding ladder for preventing damage caused by ship shaking, comprising a mobile platform 1, an inclined ladder 2, an adjustment component 3 and a connecting platform 4, one end of the inclined ladder 2 is rotatably connected to the mobile platform 1, and the adjustment component 3 is used to control the inclination angle of the inclined ladder 2.

[0022] Reference Figure 2-Figure 4 A boarding platform 5 is provided at the other end of the inclined ladder 2. The boarding platform 5 includes a ladder plate 51 fixed to the end of the inclined ladder 2, a pedal 52 rotatably connected to the ladder plate 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.

[0023] Reference Figure 5-Figure 7 A shock absorbing unit 6 is provided between the side plate 55 and the pedal 52. The shock absorbing unit 6 includes a connecting frame 61 fixed at 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. A connecting arm 64 is rotatably connected to the side plate 55 through a rotating shaft, wherein the connecting arm 64 is connected to the connecting shaft 63 through an elastic element. Specifically, the elastic element includes an air floating spring 65, which is arranged at the connection between the connecting shaft 63 and the end of the connecting arm 64. Transmission shafts 66 are installed at both ends of the air floating spring 65, and the transmission shaft 66 is rotatably connected to the connecting frame 61 and the connecting shaft 63, respectively.

[0024] It should be noted that when the ship is affected by wind and waves or water level changes and sways left and right and moves up and down, the bottom plate 54 and the side plate 55 will not only move left and right with the ship, but 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, 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 shaking of the ship, the connecting arm 64 pulls the connecting shaft 63, and the connecting shaft 63 drives the pull rod 62 to move. The pull rod 62 is rotatably connected to the connecting frame 61 fixed at the bottom end of the pedal 52, thereby causing the pedal 52 to produce a corresponding displacement. In this process, the air floating spring 65 uses the removable gas to Compressibility. When impacted by external force, the internal gas is compressed to store 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 pressure on the air floating spring 65. The air floating spring 65 is compressed, and the kinetic energy brought by the rise of the ship is converted into elastic potential energy of the gas and stored. When the ship falls back, the air floating spring 65 slowly releases energy, pushing the connecting shaft 63, the pull rod 62 and other components to reset, slowing down the falling speed of the pedal 52. This process effectively weakens the shaking amplitude of the pedal 52, avoids the violent shaking of the pedal 52 due to the movement of the ship, reduces the risk of people slipping or falling, and compared with the rigid connection of the traditional boarding ladder, it avoids excessive concentration of stress at the connection part, and prevents the boarding ladder from tilting or local deformation due to inability to adapt to the shaking of the ship.

[0025] Among them, refer to Figure 6, dampers 67 hinged to the bottom plate 54 are symmetrically arranged on both sides of the connecting frame 61, and one end of the damper 67 away from the bottom plate 54 is hinged to the connecting frame 61. The damper 67 mainly includes a cylinder, 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, and the damping spring 68 is deformed to generate a damping force. The damping force consumes the energy of the swing of the pedal 52, and further suppresses the swing of the pedal 52. For example, when the air floating spring 65 releases energy to push the pedal 52 to reset, the damper 67 generates a reverse damping force through the damping spring 68 to avoid excessive swinging due to the pedal 52 resetting too fast, and ensure that the pedal 52 returns to a relatively stable position smoothly. The damper 67 works in coordination with the air floating spring 65. The air floating spring 65 is responsible for absorbing most of the impact energy caused by the swaying and ups and downs of the ship, and the damper 67 is used to control the swing speed of the pedal 52, so that it can be reset smoothly, avoid long-term shock, and provide a safe and stable platform for people to board the ship.

[0026] When the ship is in a stable state, the shock absorbing unit 6 supports the boarding platform 5. When the ship is shaken by wind and waves or water level changes, the connecting arm 64 swings with the side plate 55, and the elastic element is compressed or stretched to absorb and buffer the impact force caused by the shaking of the ship and offset the vibration of the pedal 52. At the same time, the damper 67 cooperates with the damping spring 68 to suppress excessive shaking of the boarding platform 5.

[0027] Reference Figure 6 , vertical rods 611 are symmetrically arranged at the bottom end of the connecting frame 61, and horizontal rods 612 are fixed between the vertical rods 611. Multiple groups of air bags 613 for buffering are arranged between the horizontal rods 612 and the bottom plate 54. The air bags 613 are between the horizontal rods 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 relative to the horizontal rod 612, and the air bags 613 are compressed. When the ship falls back, the air bags 613 release energy, pushing the horizontal rod 612 and the pedal 52 connected thereto to return to their original position smoothly, further buffering the shaking of the pedal 52 and reducing its displacement amplitude.

[0028] Further, see Figure 8 A buffer unit 7 is symmetrically provided between the vertical rod 611 and the side plate 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 body, a piston rod, a damping medium and a piston. When the ship shakes and causes the pedal 52 to displace, the buffer unit 7 can further provide buffering, the buffer spring 72 absorbs vibration energy, and the universal shaft 74 ensures that the buffer 71 can effectively function in different directions.

[0029] It should be noted that when the ship is affected by wind and waves or the water level changes and presents a forward and backward undulating motion, during this process, the pedal 52, the bottom plate 54 and the side plate 55 are displaced as the ship shakes. At this time, the connecting arm 64 rotates around the rotation axis between it and 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 displacement relative to the side plate 55 through the connecting frame 61. At this time, the buffer 71 flexibly adapts to the change of the angle between the vertical rod 611 and the side plate 55 through the universal shaft 74, regardless of how the angle of the two changes due to the forward and backward undulations of the ship. , the buffer 71 can be effectively connected and work, the buffer spring 72 is compressed or stretched under the action of the buffer 71, and further absorbs the energy generated by the displacement of the pedal 52 relative to the side plate 55. For example, when the ship rises and falls forward, the pedal 52 tilts forward, 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, and pushes the piston rod of the buffer 71 to extend, thereby suppressing the excessive swing of the pedal 52, thereby keeping the pedal 52 in a stable state when the ship shakes.

[0030] Among them, refer to Fig. 9 The side panels 55 are connected to the connecting platform 4 through multiple groups of detachable connecting members 551. The connecting members 551 can be bolts. The connecting platform 4 is provided with screw holes adapted to the connecting members 551. The side panels 55 are provided with movable grooves 552 corresponding to the number of the connecting members 551. Rubber plugs 553 are fixed in the movable grooves 552. The rubber plugs 553 are provided with openings 554 for the connecting members 551 to pass through. When the ship is affected by wind and waves or water level changes and bumps, the side panels 55 will be displaced accordingly. At this time, the movable grooves 552 provide a certain amount of movable space for the connecting members 551. During the displacement of the side panels 55, the connecting members 551 can move in a small range in the movable grooves 552. When the connecting members 551 move in the movable grooves 552, the rubber plugs 553 can undergo a certain degree of elastic deformation to absorb the vibration energy generated by the displacement, thereby playing a buffering effect and avoiding excessive rigid stress between the side panels 55 and the connecting platform 4 due to the shaking of the ship.

[0031] Furthermore, the upper and lower edges of the rubber plug 553 are provided with a flange structure 555 that contacts the edge outer wall of the movable groove 552. The flange structure 555 enhances the connection stability between the rubber plug 553 and the movable groove 552, prevents the rubber plug 553 from escaping from the movable groove 552 during the buffering process, and further improves the buffering effect.

[0032] Reference Figure 5The bottom ends of the bottom plate 54 and the side plates 55 are both provided with buffer pads 57 which 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-skid role, reducing the wear between the bottom plate 54 and the side plates 55 and the connecting platform 4 caused by vibration, thereby enhancing the overall stability of the boarding ladder.

[0033] Reference Fig.10 The upper surfaces of the ladder board 51 and the pedal board 52 are provided with anti-skid pads 58, and the upper surfaces of the anti-skid pads 58 are wavy in design. The wavy anti-skid pads 58 can effectively increase the friction between the soles and the ladder board 51 and the pedal board 52 to prevent the boarders from slipping.

[0034] Reference Fig.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, and at the same time prevent debris from entering, preventing it from scratching and wearing the shock absorbing unit 6 and the buffer unit 7.

[0035] The buffer pad 57 , the anti-slip pad 58 and the protective cover 59 can all be made of rubber.

[0036] Further, see Fig.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 with a first connecting column 82 through a rotating shaft. The two sides of the pedal 52 are rotatably connected with a 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 torque exerted on the driving shaft 53 to avoid damage to the driving shaft 53 due to excessive torque, 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.

[0037] The working principle of a boarding ladder for preventing damage caused by shaking of a ship provided by the present invention 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 adjusting the assembly 3 so that the inclined ladder 2 can adapt to the ship to be connected, and then the bottom plate 54 and the side plate 55 are placed on the connecting platform 4, and connected to the connecting platform 4 through multiple groups of connecting pieces 551, and the connecting platform 4 is provided with threaded grooves adapted to the connecting pieces 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 and the auxiliary unit 8 and other components are relatively stationary; When the ship sways left and right and moves up and down, the bottom plate 54 and the side plate 55 move together with the ship. At this time, the connecting arm 64 rotatably connected to the side plate 55 changes position accordingly, and the connecting arm 64 pulls the connecting shaft 63, and the connecting shaft 63 drives the pull rod 62 to cause the pedal 52 to move accordingly. At this time, the air floating spring 65 uses the compressibility of gas. When the ship rises and falls upward and the side plate 55 drives the connecting arm 64 to move upward, the connecting shaft 63 presses the air floating spring 65 to compress it, converting the upward kinetic energy of the ship into gas elastic potential energy storage. When the ship falls downward, the air floating spring 65 slowly releases Energy is released to push the connecting shaft 63, the pull rod 62 and other components to reset, slowing down the falling speed of the pedal 52 and reducing the swing 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 cooperate with the damping spring 68 to work. The piston rod of the damper 67 moves relative to the cylinder barrel, and the damping spring 68 deforms to generate a damping force to consume the swing energy of the pedal 52. In particular, when the air floating spring 65 releases energy to push the pedal 52 to reset, the damper 67 generates a reverse damping force through the damping spring 68 to avoid excessive swing caused by the pedal 52 being reset too quickly, so that the pedal 52 returns to a relatively stable position. When the boat pitches up and down, the multiple groups of air bags 613 are compressed or stretched as the relative positions of the bottom plate 54 and the crossbar 612 change, further buffering the shaking of the pedal 52; When the boat is moving forward and backward, the pedal 52, the bottom plate 54 and the side plate 55 are displaced with the shaking of the boat. At this time, the connecting arm 64 rotates around the rotation axis between it and the side plate 55, and the bottom plate 54 rotates around the rotation axis 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 shaft 74, and the buffer spring 72 is compressed or stretched to absorb the energy generated by the displacement of the pedal 52 relative to the side plate 55, thereby suppressing the excessive swing of the pedal 52 and keeping the pedal 52 stable. When the ship bumps and 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 to absorb the vibration energy generated by the displacement, thereby avoiding excessive rigid stress between the side plate 55 and the connecting platform 4. The air spring 84 of the auxiliary unit 8 between the two sides of the pedal 52 and the side wall of the inclined ladder 2 buffers the torsion of the driving shaft 53 when the pedal 52 rotates, thereby providing support and buffering for the pedal 52 from the side and reducing the burden on the driving shaft 53.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A boarding ladder for preventing damage caused by swaying of a ship, comprising a moving platform (1), an inclined ladder (2), an adjustment component (3) and a connecting platform (4), wherein one end of the inclined ladder (2) is rotatably connected to the moving platform (1), and the adjustment component (3) is used to control the inclination angle of the inclined ladder (2), and is characterized in that: A boarding platform (5) is provided at the other end of the inclined ladder (2), the boarding platform (5) comprising a ladder plate (51) fixed to the end of the inclined ladder (2), a pedal (52) rotatably connected to the ladder plate (51) via 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) via a rotating shaft (56); A shock absorbing unit (6) is provided between the side plate (55) and the pedal (52), the shock absorbing unit (6) comprising 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) being fixed to one end of the pull rod (62) away from the connecting frame (61), a connecting arm (64) being rotatably connected to the side plate (55), wherein the connecting arm (64) and the connecting shaft (63) are connected via an elastic element, dampers (67) hinged to the bottom plate (54) are symmetrically provided on both sides of the connecting frame (61), and a damping spring (68) is provided on the damper (67), when the boat shakes, the connecting arm (64) swings along with the side plate (55), and the elastic element is used to offset the vibration of the pedal (52).

2. The boarding ladder for preventing damage caused by ship shaking according to claim 1, characterized in that: The elastic element comprises an air floating spring (65), the air floating spring (65) being arranged at the connection between the connecting shaft (63) and the end of the connecting arm (64), and transmission shafts (66) being 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).

3. The boarding ladder for preventing damage caused by ship shaking according to claim 1, characterized in that: A vertical rod (611) is symmetrically arranged at the bottom end of the connection frame (61), and a buffer unit (7) is symmetrically arranged between the vertical rod (611) and the side plate (55); The buffer unit (7) comprises a buffer (71) and a buffer spring (72) arranged on the buffer (71); a bracket (73) for connecting the buffer (71) is fixed on the side plate (55); and the buffer (71) is rotatably connected to the vertical rod (611) and the bracket (73) respectively via a universal shaft (74).

4. The boarding ladder for preventing damage caused by ship shaking according to claim 3 is characterized in that: A cross bar (612) is fixed between the vertical bars (611), and a plurality of groups of air bags (613) for cushioning are arranged between the cross bar (612) and the bottom plate (54).

5. The boarding ladder for preventing damage caused by ship shaking according to claim 1, characterized in that: The side plate (55) is connected to the connection platform (4) via a plurality of groups of detachable connecting pieces (551); the side plate (55) is provided with movable grooves (552) corresponding to the number of connecting pieces (551); a rubber plug (553) is fixed in the movable groove (552); and the rubber plug (553) is provided with an opening (554) for the connecting pieces (551) to pass through.

6. The boarding ladder for preventing damage caused by ship shaking according to claim 5, characterized in that: The upper and lower edges of the rubber stopper (553) are both provided with flange structures (555) that are in contact with the outer wall of the edge of the movable groove (552).

7. The boarding ladder for preventing damage caused by ship shaking according to claim 1, characterized in that: The 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 connection platform (4).

8. The boarding ladder for preventing damage caused by ship shaking according to claim 1, characterized in that: The upper surfaces of the ladder plate (51) and the pedal (52) are provided with anti-skid pads (58), and the upper surfaces of the anti-skid pads (58) are designed in a wavy shape.

9. The boarding ladder for preventing damage caused by ship shaking according to claim 1, characterized in that: A retractable protective cover (59) is provided between the pedal (52), 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).

10. The boarding ladder for preventing damage caused by ship shaking according to claim 1, characterized in that: 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) comprising a connecting frame (81) symmetrically fixed to the two side walls of the inclined ladder (2), a first connecting column (82) being rotatably connected to the connecting frame (81), a second connecting column (83) being rotatably connected to the two sides of the pedal (52), and an air spring (84) being fixedly connected between the second connecting column (83) and the first connecting column (82).

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