A ferry with automatic lifting and automatic balancing function

Abstract

The present application relates to the technical field of pontoon, and discloses a pontoon with automatic lifting and automatic balancing function, comprising a pontoon body. Through cooperation of the driving motor and the crank, the present application realizes automatic and accurate lifting of the ship gangway, without manual adjustment, and can quickly respond to water level changes or differences in wharf height, drive the ship gangway to stably lift along the limiting column, and ensure that the gangway always maintains a suitable lap angle with the wharf. Meanwhile, in the process of height adjustment of the ship gangway, through the linkage action of the connecting rod and the rocker arm, the lifting range of the second step is greater than that of the first step by using the lever principle, so that the step height can be automatically adjusted, and the first step and the second step always maintain a coherent stepped structure with the positioning block and the ship gangway when the height of the ship gangway changes, so that automatic matching and balancing of the step height are realized, the continuity and safety of personnel passage are ensured, and the passage obstacle caused by mismatching of the step height is avoided.

Description

Technical Field

[0001] This invention belongs to the field of barge technology, specifically, it relates to a barge with automatic lifting and automatic balancing functions. Background Technology

[0002] In water transportation and port operations, pontoons, as floating platforms, are often used to connect land-based docks with ships, providing access for the transfer of people and goods. However, traditional pontoons face many insurmountable problems in actual use.

[0003] When water levels rise and fall due to tides, seasonal changes, or other factors, the overlap angle between the gangplank and the dock changes significantly, sometimes even failing to overlap effectively. In such cases, manual adjustment of the gangplank height using tools is laborious, consuming a large amount of manpower, resulting in low efficiency and difficulty in responding quickly to dynamic changes in water levels. Inaccurate adjustments may also lead to significant drops or tilt angles between the gangplank and the dock, causing great inconvenience to personnel passage and cargo transfer, and even posing safety hazards. The stepped structures connecting the gangplank and the pontoon are often fixed, and their height differences cannot be adjusted synchronously with changes in the gangplank height. When the gangplank is adjusted due to water level changes, the height differences between the steps and the gangplank, and between the steps, become mismatched, resulting in steps that are too high, too low, or broken connections. When people get on and off the pontoon, they have to cross unreasonable height differences, which can easily lead to tripping, falling, and other safety accidents, seriously affecting the continuity and safety of passage.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A barge with automatic lifting and automatic balancing functions, comprising the barge body.

[0007] A boat ramp is vertically slidable on the pontoon body, and the boat ramp is used to connect the pontoon body and the dock. A drive motor is installed at the bottom of the pontoon body, and a crank is installed at the output end of the drive motor. The end of the crank is attached to the bottom of the boat ramp.

[0008] The pontoon body is equipped with a base, the base is equipped with a positioning block, and the base is vertically connected with a first-level step and a second-level step, and the positioning block, the first-level step, the second-level step and the boat ramp are in a stepped shape.

[0009] A connecting rod is rotatably mounted on the side wall of the crank, and a rocker arm is rotatably mounted on the end of the connecting rod. The end of the rocker arm is rotatably connected to the base, and the connection point between the rocker arm and the base is located directly below the first step. The rocker arm is slidably connected directly below the first and second steps. When the height of the boat ramp changes, the relative heights of the first and second steps change accordingly.

[0010] In a preferred embodiment of the present invention, several pairs of rubber pads are installed around the pontoon body. The rubber pads are used to mitigate damage to the pontoon body from collisions with external ships and docks. Steel cables are installed on the rubber pads and are connected to the pontoon body.

[0011] In a preferred embodiment of the present invention, a number of pillars are installed around the pontoon body, and two sets of pull ropes are installed between the pillars. The two sets of pull ropes are vertically distributed, and a gap is provided between the two sets of pull ropes. The gap is located between two adjacent pillars, and a boat ramp is set inside the gap.

[0012] In a preferred embodiment of the present invention, a positioning post is installed on the boat ramp, the positioning post is vertical, a pull plate is installed on the side wall of the positioning post, the end of the pull plate is connected to the side wall of the boat ramp, the pull plate, the positioning post and the boat ramp form a triangle, a reinforcing rib is vertically installed on the boat ramp, the end of the reinforcing rib is connected to the surface of the pull plate, and anti-slip grooves are formed on the surface of the boat ramp, the secondary step, the primary step and the positioning block.

[0013] In a preferred embodiment of the present invention, a limiting post is provided on the pontoon body, and an mounting plate is welded to the bottom of the limiting post. The mounting plate is connected to the boat ramp by bolts. A limiting groove is formed on the limiting post, and a limiting block is slidably provided on the limiting groove. The limiting block is connected to the boat ramp. A limiting rod is vertically provided through the limiting groove. The limiting rod movably passes through the limiting block. A limiting spring is sleeved on the limiting rod. One end of the limiting spring is engaged with the limiting block, and the other end of the limiting spring is engaged with the end face of the limiting groove.

[0014] In a preferred embodiment of the present invention, a pair of connecting plates are installed at the bottom of the boat ramp, and the crank is slidably disposed in the gap between the pair of connecting plates. A through groove is provided on the pair of connecting plates. The through groove is in the shape of a straight line and is parallel to the boat ramp. A roller is rotatably installed on the top of the crank and is slidably connected to the through groove.

[0015] In a preferred embodiment of the present invention, the side wall of the first-level step is slidably connected to the side wall of the positioning block, the other side wall of the first-level step is slidably connected to the side wall of the second-level step, the height of the second-level step is higher than the height of the first-level step, a sliding plate is installed at the end of the boat gangplank, the sliding plate is slidably connected to the side wall of the second-level step, and a vertical groove is provided on the sliding plate, and the vertical groove is slidably connected to the rocker arm.

[0016] In a preferred embodiment of the present invention, a pair of connecting frames are installed on the side walls of the positioning block, the first-level step and the second-level step, and a handrail is installed on the top of the pair of connecting frames. The surface of the handrail is provided with anti-slip grooves, and a cross rib is installed between the pair of connecting frames to improve the stability of the connection.

[0017] In a preferred embodiment of the present invention, positioning rods are installed at the bottom of the first-level step and the second-level step. Positioning sleeves are movably inserted into the side walls of the positioning rods. The positioning sleeves are welded to the base. Positioning plates are installed at the ends of the positioning rods. The positioning plates are slidably disposed on the inner wall of the positioning sleeves. Positioning springs are sleeved on the positioning rods located on the inner wall of the positioning sleeves. One end of the positioning springs is engaged with the positioning plate, and the other end is engaged with the inner wall of the positioning sleeves.

[0018] In a preferred embodiment of the present invention, a mounting base is rotatably mounted at the end of the rocker arm, the mounting base is mounted on the base, a strip groove is provided on the rocker arm, a top rod is installed at the bottom of the first-level step and the second-level step, and a sliding rod is installed at the bottom of the two top rods, with each sliding rod slidably disposed in the strip groove.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention achieves automatic and precise raising and lowering of the pontoon by using a drive motor and crank, eliminating the need for manual adjustment. It can quickly respond to changes in water level or differences in dock height, driving the pontoon to rise and fall smoothly along the limit posts, ensuring that the pontoon always maintains a suitable overlap angle with the dock. This significantly improves the convenience of connecting the pontoon to the dock, while saving labor costs and increasing operational efficiency. Furthermore, during the height adjustment of the pontoon, the linkage of the connecting rod and rocker arm utilizes the lever principle to ensure that the raising and lowering range of the second step is greater than that of the first step. This allows for automatic adjustment of the step height, providing automatic balancing capability of the stepped structure. It ensures that when the height of the pontoon changes, the first and second steps, the positioning blocks, and the pontoon itself maintain a continuous stepped structure, achieving automatic matching and balance of step height. This ensures the continuity and safety of personnel passage and avoids passage obstacles caused by mismatched step heights.

[0021] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0022] In the attached diagram:

[0023] Figure 1 A 3D diagram of a barge with automatic lifting and automatic balancing functions;

[0024] Figure 2 A front view of a barge with automatic lifting and automatic balancing functions;

[0025] Figure 3 A partial view of a barge with automatic lifting and automatic balancing functions. Figure 1 ;

[0026] Figure 4 A barge with automatic lifting and automatic balancing functions. Figure 3 Bottom view;

[0027] Figure 5 A partial view of a barge with automatic lifting and automatic balancing functions. Figure 2 ;

[0028] Figure 6 A partial view of a barge with automatic lifting and automatic balancing functions. Figure 3 ;

[0029] Figure 7 A barge with automatic lifting and automatic balancing functions. Figure 6 Enlarged view of point A in the middle;

[0030] Figure 8 This is a sectional view of the positioning sleeve of a barge with automatic lifting and automatic balancing functions.

[0031] In the picture:

[0032] 1. Pontoon hull; 11. Rubber pad; 111. Steel cable; 12. Post; 121. Guy rope; 122. Notch;

[0033] 2. Boat ramp; 21. Positioning post; 211. Pull plate; 212. Reinforcing rib; 22. Limiting post; 221. Mounting plate; 222. Limiting groove; 223. Limiting block; 224. Limiting rod; 225. Limiting spring; 23. Crank; 231. Roller; 232. Connecting plate; 233. Through groove; 234. Drive motor; 24. Slide plate;

[0034] 3. Base; 31. Positioning block; 32. First step; 33. Second step; 34. Handrail; 341. Cross rib; 342. Connecting frame; 35. Positioning sleeve; 351. Positioning rod; 352. Positioning plate; 353. Positioning spring;

[0035] 4. Rocker arm; 41. Connecting rod; 411. Mounting base; 42. Strip groove; 421. Top rod; 422. Slide rod. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0037] Example 1:

[0038] like Figures 1 to 8 As shown, a barge with automatic lifting and automatic balancing functions includes a barge body 1.

[0039] A boat ramp 2 slides vertically on the pontoon body 1, and the boat ramp 2 is used to connect the pontoon body 1 and the dock. A drive motor 234 is installed at the bottom of the pontoon body 1, and a crank 23 is installed at the output end of the drive motor 234. The end of the crank 23 is attached to the bottom of the boat ramp 2.

[0040] A base 3 is installed on the pontoon body 1, a positioning block 31 is installed on the base 3, and a first-level step 32 and a second-level step 33 are vertically inserted on the base 3. The positioning block 31, the first-level step 32, the second-level step 33 and the boat gangway 2 are in a stepped shape.

[0041] A connecting rod 41 is rotatably mounted on the side wall of crank 23, and a rocker arm 4 is rotatably mounted on the end of connecting rod 41. The end of rocker arm 4 is rotatably connected to base 3, and the connection point between rocker arm 4 and base 3 is located directly below the first step 32. The first step 32 and the second step 33 are slidably connected to rocker arm 4 directly below. When the height of the boat ramp 2 changes, the relative heights of the first step 32 and the second step 33 change accordingly. By driving crank 23 through drive motor 234, and cooperating with the transmission of connecting rod 41 and rocker arm 4, the linkage adjustment of boat ramp 2, first step 32 and second step 33 can be realized, ensuring that each component always maintains a stepped distribution, and improving the flexibility of the pontoon to adapt to different water levels.

[0042] like Figures 1 to 8 As shown, in a specific embodiment, several pairs of rubber pads 11 are installed around the pontoon body 1. The several pairs of rubber pads 11 are used to reduce the damage caused by collisions between external ships and docks to the pontoon body 1. The several pairs of rubber pads 11 are equipped with steel cables 111, which are connected to the pontoon body 1.

[0043] like Figures 1 to 8As shown, furthermore, several pillars 12 are installed around the perimeter of the pontoon body 1, and two sets of ropes 121 are installed between the pillars 12. The two sets of ropes 121 are vertically distributed, and a notch 122 is provided between the two sets of ropes 121. The notch 122 is located between two adjacent pillars 12, and the boat ramp 2 is installed inside the notch 122. The pillars 12 and ropes 121 can protect the edges of the pontoon body 1, and the notch 122 provides reasonable installation space for the boat ramp 2, ensuring that the boat ramp 2 is not disturbed during use.

[0044] Example 2:

[0045] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a positioning post 21 is installed on the boat ramp 2. The positioning post 21 is vertical, and a pull plate 211 is installed on the side wall of the positioning post 21. The end of the pull plate 211 is connected to the side wall of the boat ramp 2. The pull plate 211, the positioning post 21, and the boat ramp 2 form a triangle. A reinforcing rib 212 is vertically installed on the boat ramp 2. The end of the reinforcing rib 212 is connected to the surface of the pull plate 211. Anti-slip grooves are formed on the surfaces of the boat ramp 2, the secondary step 33, the primary step 32, and the positioning block 31. The triangular structure of the pull plate 211 and the positioning post 21 enhances the structural strength of the boat ramp 2, the reinforcing rib 212 further improves stability, and the anti-slip grooves increase friction to prevent people from slipping when passing through.

[0046] like Figures 1 to 8 As shown, in a specific embodiment, a limit post 22 is provided on the pontoon body 1. An installation plate 221 is welded to the bottom of the limit post 22. The installation plate 221 is connected to the boat ramp 2 by bolts. A limit groove 222 is provided on the limit post 22. A limit block 223 is slidably provided on the limit groove 222. The limit block 223 is connected to the boat ramp 2. A limit rod 224 is vertically provided through the limit groove 222. The limit rod 224 movably passes through the limit block 223. A limit spring 225 is sleeved on the limit rod 224. One end of the limit spring 225 is engaged with the limit block 223, and the other end of the limit spring 225 is engaged with the end face of the limit groove 222. The limiting post 22, the limiting block 223 and the limiting rod 224 can guide the raising and lowering of the boat ramp 2 to ensure its vertical movement. The limiting spring 225 can buffer the impact force during raising and lowering, making the boat ramp 2 move more smoothly.

[0047] like Figures 1 to 8As shown, furthermore, a pair of connecting plates 232 are installed at the bottom of the boat ramp 2. The crank 23 is slidably disposed in the gap between the pair of connecting plates 232. The pair of connecting plates 232 are provided with through grooves 233, which are straight and parallel to the boat ramp 2. A roller 231 is rotatably mounted on the top of the crank 23, and the roller 231 is slidably connected to the through groove 233. The connecting plates 232 provide a stable structure for the connection between the crank 23 and the boat ramp 2. The sliding engagement between the roller 231 and the through groove 233 reduces the friction when the crank 23 is driven, making the raising and lowering of the boat ramp 2 smoother and reducing component wear.

[0048] Example 3:

[0049] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, the side wall of the first-level step 32 is slidably connected to the side wall of the positioning block 31, and the other side wall of the first-level step 32 is slidably connected to the side wall of the second-level step 33. The height of the second-level step 33 is higher than that of the first-level step 32. A sliding plate 24 is installed at the end of the boat ramp 2. The sliding plate 24 is slidably connected to the side wall of the second-level step 33, and a vertical groove is provided on the sliding plate 24, which is slidably connected to the rocker arm 4. A pair of connecting frames 342 are installed on the side walls of the positioning block 31, the first-level step 32, and the second-level step 33. A handrail 34 is installed on the top of the pair of connecting frames 342. The surface of the handrail 34 is provided with anti-slip grooves. A cross rib 341 is installed between the pair of connecting frames 342 to improve the stability of the connection. The sliding connection between the first-level step 32 and the positioning block 31 and the second-level step 33, together with the sliding of the sliding plate 24 and the rocker arm 4, ensures the smoothness of step adjustment. The handrail 34 provides support for personnel passage, the anti-slip groove enhances the grip stability, and the cross rib 341 improves the load-bearing capacity of the connecting frame 342.

[0050] like Figures 1 to 8 As shown in the specific embodiment, positioning rods 351 are installed at the bottom of both the first-level step 32 and the second-level step 33. Positioning sleeves 35 are movably inserted into the side walls of the positioning rods 351 and welded to the base 3. A positioning plate 352 is installed at the end of the positioning rods 351 and slidably disposed on the inner wall of the positioning sleeves 35. A positioning spring 353 is sleeved on the positioning rods 351 located on the inner wall of the positioning sleeves 35. One end of the positioning spring 353 is engaged with the positioning plate 352, and the other end is engaged with the inner wall of the positioning sleeves 35. The positioning rods 351 and positioning sleeves 35 guide the lifting and lowering of the first-level step 32 and the second-level step 33, ensuring their vertical movement. The positioning spring 353 facilitates the subsequent repositioning of the first-level step 32 and the second-level step 33.

[0051] like Figures 1 to 8As shown, furthermore, a mounting base 411 is rotatably mounted on the end of the rocker arm 4. The mounting base 411 is mounted on the base 3. A strip groove 42 is provided on the rocker arm 4. A top rod 421 is installed at the bottom of both the first-level step 32 and the second-level step 33. A sliding rod 422 is installed at the bottom of each top rod 421. Each sliding rod 422 is slidably disposed in the strip groove 42. The mounting base 411 provides a stable rotation fulcrum for the rocker arm 4. The sliding cooperation between the strip groove 42 and the sliding rod 422 can convert the rotation of the rocker arm 4 into the lifting and lowering motion of the first-level step 32 and the second-level step 33. The top rod 421 plays a role in force transmission, ensuring that the step adjustment is accurate and in place.

[0052] The implementation principle of the pontoon with automatic lifting and automatic balancing functions of the present invention is as follows:

[0053] The pontoon body 1 of the present invention floats on the water surface. The pontoon body 1 and the dock are connected by a boat gangway 2. Users can get on and off the boat through the boat gangway 2, the second-level step 33, the first-level step 32 and the positioning block 31.

[0054] When the water depth changes, the gangplank 2 will not be able to be properly attached to the dock. At this time, the operator needs to adjust the gangplank 2 to facilitate the user's boarding and disembarking.

[0055] When the height of the gangplank needs to be adjusted to adapt to changes in water level or dock height, the drive motor 234 starts and drives the crank 23 to rotate. Since the roller 231 at the end of the crank 23 is in contact with the through groove 233 at the bottom of the gangplank 2, the rotation of the crank 23 will push the gangplank 2 to slide vertically along the limiting post 22 on the pontoon body 1 through the sliding of the roller 231 in the through groove 233. The limiting block 223 slides along the limiting rod 224 in the limiting groove 222, and the limiting spring 225 provides cushioning, thereby realizing the smooth adjustment of the height of the gangplank 2, so that it can better connect with the dock. This automatic lifting process does not require manual lifting or adjustment of the gangplank. The mechanical transmission of the drive motor 234 achieves precise height control, which not only saves labor costs, but also responds quickly to changes in water level, ensuring that the gangplank always maintains a suitable connection angle with the dock, improving the convenience and safety of passage.

[0056] As crank 23 rotates, connecting rod 41 on its side wall moves synchronously, causing rocker arm 4 to rotate around the connection point with mounting base 411 on base 3. Since rocker arm 4 has a slot 42, the sliding rod 422 at the end of the top rod 421 at the bottom of first-stage step 32 and the corresponding sliding rod 422 at the bottom of second-stage step 33 are both slidably positioned within the slot 42. Furthermore, the connection point between rocker arm 4 and base 3 (i.e., mounting base 411) is located directly below first-stage step 32. This means that the sliding rod 422 at the bottom of second-stage step 33 is further away from the rotation center of rocker arm 4 within the slot 42 than the sliding rod 422 of first-stage step 32. Therefore, when rocker arm 4 rotates around mounting base 411, according to the lever principle, the vertical displacement of the sliding rod 422 corresponding to second-stage step 33, which is farther from the rotation center, is greater than that of the sliding rod 422 of first-stage step 32, resulting in a greater lifting amplitude for second-stage step 33 than for first-stage step 32.

[0057] Meanwhile, the positioning rods 351 at the bottom of the first step 32 and the second step 33 will slide synchronously within the positioning sleeve 35. The positioning spring 353 within the positioning sleeve 35 provides auxiliary support and buffering for the movement of the two through the positioning plate 352, ensuring their smooth lifting and lowering.

[0058] Combining the original stepped arrangement of the first-level step 32, the second-level step 33, the positioning block 31, and the boat ramp 2, the height difference caused by the longer movement distance of the second-level step 33 can accurately match the state after the height adjustment of the boat ramp 2, so that the relative heights of the first-level step 32 and the second-level step 33 always maintain the corresponding step difference, maintaining the overall stepped continuous structure, thereby realizing the automatic balancing function. This ensures that personnel can still pass between the pontoon body 1 and the dock along the continuous and stable stepped structure after the water level changes, avoiding passage obstacles or safety hazards caused by mismatched step heights.

Claims

1. A pier with automatic lifting and automatic balancing functions, comprising a pier body (1), characterized in that: a ship gangway (2) is vertically slid on the pier body (1), and the ship gangway (2) is used to connect the pier body (1) and the pier; a drive motor (234) is installed at the bottom of the pier body (1); a crank (23) is installed at the output end of the drive motor (234); and the end of the crank (23) is attached to the bottom of the ship gangway (2). A base (3) is installed on the pier body (1); a positioning block (31) is installed on the base (3); a first step (32) and a second step (33) are vertically inserted on the base (3); and the positioning block (31), the first step (32), the second step (33), and the ship gangway (2) are in a ladder shape. A connecting rod (41) is rotatably installed on the side wall of the crank (23); a rocker arm (4) is rotatably installed at the end of the connecting rod (41); the end of the rocker arm (4) is rotatably connected with the base (3); the connecting point of the rocker arm (4) and the base (3) is located directly below the first step (32); the first step (32) and the second step (33) are slidably connected with the rocker arm (4) directly below; and the mutual height of the first step (32) and the second step (33) changes correspondingly when the height of the ship gangway (2) changes. A plurality of pairs of rubber pads (11) are installed around the pier body (1); the plurality of pairs of rubber pads (11) are used to reduce damage to the pier body (1) caused by collision with external ships and piers; steel cables (111) are installed between the plurality of pairs of rubber pads (11); and the steel cables (111) are connected with the pier body (1).

2. The pier according to claim 1, wherein, A plurality of columns (12) are installed around the pier body (1); two groups of pull ropes (121) are installed between the plurality of columns (12); the two groups of pull ropes (121) are vertically distributed; a gap (122) is arranged between the two groups of pull ropes (121); the gap (122) is located between two adjacent columns (12); and the ship gangway (2) is arranged inside the gap (122).

3. The kind of ferryboat with automatic lifting and automatic balancing function according to claim 1, characterized in that, A positioning column (21) is installed on the ship gangway (2); the positioning column (21) is in a vertical state; a pull plate (211) is installed on the side wall of the positioning column (21); the end of the pull plate (211) is connected with the side wall of the ship gangway (2); the pull plate (211), the positioning column (21), and the ship gangway (2) form a triangle; a reinforcing rib (212) is vertically installed on the ship gangway (2); the end of the reinforcing rib (212) is connected with the surface of the pull plate (211); and anti-skid grooves are formed on the surfaces of the ship gangway (2), the second step (33), the first step (32), and the positioning block (31).

4. The landing stage with automatic lifting and automatic balancing function according to claim 1, characterized in that, ​ 5. The kind of pier with automatic lifting and automatic balancing function according to claim 1, characterized in that, The gangway body (1) is provided with a limiting column (22), the bottom of the limiting column (22) is welded with a mounting plate (221), the mounting plate (221) is connected with the marine gangway (2) through bolt screwing, the limiting column (22) is provided with a limiting groove (222), the limiting groove (222) is slidably provided with a limiting block (223), and the limiting block (223) is connected with the marine gangway (2), the limiting groove (222) is vertically provided with a limiting rod (224), the limiting rod (224) is movably inserted into the limiting block (223), the limiting rod (224) is sleeved with a limiting spring (225), one end of the limiting spring (225) is clamped on the limiting block (223), and the other end of the limiting spring (225) is clamped on the end face of the limiting groove (222).

6. The landing stage with automatic lifting and automatic balancing function according to claim 1, characterized in that, The marine gangway (2) is provided with a pair of connecting plates (232) at the bottom, the connecting plates (232) are slidably provided with a crank (23), and the connecting plates (232) are provided with a through groove (233), the through groove (233) is in a linear shape, and the through groove (233) is parallel to the marine gangway (2), the crank (23) is rotatably provided with a roller (231) at the top, and the roller (231) is slidably connected with the through groove (233).

7. The landing stage with automatic lifting and automatic balancing function according to claim 1, characterized in that, The side wall of the first step (32) is slidably connected with the side wall of the positioning block (31), the other side wall of the first step (32) is slidably connected with the side wall of the second step (33), the height of the second step (33) is higher than that of the first step (32), the marine gangway (2) is provided with a sliding plate (24) at the end, the sliding plate (24) is slidably connected with the side wall of the second step (33), the sliding plate (24) is provided with a vertical groove, and the vertical groove is slidably connected with the rocker arm (4).

8. The landing stage with automatic lifting and automatic balancing function according to claim 1, characterized in that, The side wall of the positioning block (31), the first step (32) and the second step (33) are provided with a pair of connecting frames (342), the top of the connecting frames (342) is provided with a handrail (34), the surface of the handrail (34) is provided with an anti-skid groove, the connecting frames (342) are provided with a cross rib (341), and the cross rib (341) is used for improving the stability of the connection.

9. The landing stage with automatic lifting and automatic balancing function according to claim 1, characterized in that, The bottom of the first step (32) and the second step (33) is provided with a positioning rod (351), the side wall of the positioning rod (351) is movably inserted into a positioning sleeve (35), the positioning sleeve (35) is welded on the base (3), the end of the positioning rod (351) is provided with a positioning plate (352), the positioning plate (352) is slidably arranged in the inner wall of the positioning sleeve (35), the positioning rod (351) in the inner wall of the positioning sleeve (35) is sleeved with a positioning spring (353), one end of the positioning spring (353) is clamped on the positioning plate (352), and the other end of the positioning spring (353) is clamped on the inner wall of the positioning sleeve (35).

10. The landing stage with automatic lifting and automatic balancing function according to claim 1, characterized in that, The rocker arm (4) is rotatably installed with a mounting seat (411), the mounting seat (411) is installed on the base (3), a strip-shaped slot (42) is formed in the rocker arm (4), the first step (32) and the second step (33) are both installed with a top rod (421), the bottom of the two top rods (421) is both installed with a sliding rod (422), and the sliding rod (422) is slidably arranged in the strip-shaped slot (42).

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