A rubber fender for ship

Abstract

The present invention relates to the technical field of fender structures, and specifically to a marine rubber fender, a marine rubber fender comprising a mounting seat and a fender; an elastic buffer component is arranged inside the mounting seat, an air bag is arranged between the mounting seat and the fender, and the air bag is respectively connected to the inner wall of the fender and the mounting seat. When the ship docks, the fender buffers the impact force generated by the ship to a certain extent, and then with the transmission of the impact force, the elasticity of the spring and the generated compression deformation cooperate with the air bag to buffer the impact force transmitted to the fender, and the recovery of the distance between the fender and the mounting seat also requires the air bag to restore its initial state accordingly. Therefore, the air bag needs to slowly restore the expanded state, which limits the pushing force of the spring, so that the recovery of the distance between the fender and the mounting seat is slower than the reduction, thereby avoiding the transmission of the rebound force at an excessively fast speed to the ship to cause unnecessary movement.

Description

Technical Field

[0001] The invention relates to the technical field of fender structures, in particular to a marine rubber fender. Background Art

[0002] The main function of fenders is to cushion and absorb impact energy. They are usually made of elastic materials (such as rubber, polyurethane, plastic, etc.), which have good elasticity and can be compressed and deformed when the ship is berthed, absorbing part of the impact force and reducing direct damage to the ship and the dock. For example, a spliced ​​rubber fender for ship protection disclosed in application number CN202410710745.0 includes a mounting plate, to which the rubber fender is fixedly connected, to which liquid storage bags that are staggered up and down are fixedly connected, to which a conduit is connected, to which a cylinder-piston assembly that is symmetrically distributed laterally along the mounting plate is fixedly connected, and an air duct is connected between the cylinder of the cylinder-piston assembly and the adjacent liquid storage bag. When the ship docks, the impact force of the ship on the rubber fender is utilized to fill the liquid storage bag with water and deform it, so that the upper and lower spacing of the liquid storage bag expands and stretches to contact the inner top wall and inner bottom wall of the rubber fender, thereby resisting the upward impact force of the water body on the shore, preventing the bottom of the rubber fender from being unilaterally impacted by the water body and bending and deforming upward, and avoiding affecting the protective performance of the rubber fender on the hull.

[0003] Another example is a ship fender structure disclosed in application number CN202010085492.4, comprising: a main body, an inner groove, a socket, a mounting groove, an inner part, an auxiliary part and an outer part; the main body is a rectangular plate structure, and the main body is made of spring steel; the inner groove is arranged in the middle position of the rear end of the main body; the inner groove includes a side part; the inner groove is an arc-shaped structure; the side part is made of rubber, and a plurality of circular holes are arranged inside the side part; a plurality of contact parts with a conical structure are arranged inside the circular holes of the side part; the main body is used to directly contact the hull, so that the main body can drive the device to be installed on both sides of the hull, thereby protecting the hull. When the main body is in use, multiple main bodies can be spliced ​​and fixed on the outside of the hull, thereby providing comprehensive protection, so that the device can be used on different hulls when in use, can be freely spliced ​​according to needs, and if a single main body is damaged, the single main body can be removed and repaired by manpower.

[0004] However, in the above patent, when the ship contacts the fender, the fender will be compressed and absorb the impact energy. If the fender material has strong elasticity, the fender will quickly return to its original shape when the external force is released. This recovery process may generate a rebound force, causing the ship to move in the opposite direction, thereby causing the ship to leave the dock or generate unnecessary movement.

[0005] So we proposed a marine rubber fender to solve the above-mentioned problems. Summary of the invention

[0006] The object of the present invention is to provide a marine rubber fender to solve the problem in the background art that after a ship collides with a dock, the ship may leave the dock or make unnecessary movements due to the rebound force generated by a spring or the like.

[0007] To achieve the above object, the present invention provides the following technical solutions: A marine rubber fender comprises a mounting seat and a fender for collision contact; An elastic buffer component is arranged inside the mounting seat to form a buffer distance between the fender and the mounting seat; An air bag is arranged between the mounting seat and the fender, the air bag is connected to the inner wall of the fender and the mounting seat respectively, the air bag is provided with an air inlet and an air outlet, and the air inlet rate of the air bag is lower than the air outlet rate thereof.

[0008] Preferably, the fender is made of rubber material and has a trapezoidal structure. Ear plates are arranged on both sides of the bottom surface of the trapezoidal fender, and an inner groove is arranged on the bottom surface of the trapezoidal fender.

[0009] Preferably, the air inlet of the airbag is provided with a first one-way valve and a first flow control valve in sequence, and the opening of the first one-way valve faces the inside of the airbag.

[0010] Preferably, the air outlet of the airbag is provided with a second one-way valve and a second flow control valve in sequence, and the opening of the second one-way valve faces the outside of the airbag; The flow rate through the first flow control valve is smaller than that through the second flow control valve.

[0011] Preferably, a connecting frame is provided between the fender and the mounting seat, a connecting column is provided on one side of the connecting frame, the connecting columns are distributed on the upper and lower sides of the connecting frame, the connecting columns penetrate the ear plates on both sides of the fender, and the connecting columns are fixedly connected to the ear plates through nuts; Side plates are arranged on both sides of the connecting frame, and the side plates extend into the inner groove of the fender. One end of the airbag is in the inner groove of the fender and fixedly connected to the side plates, and the other end of the airbag is fixedly connected to the outer wall of the mounting seat.

[0012] Preferably, the mounting seat has a rectangular structure, a connecting plate is arranged inside the mounting seat, the connecting plate is arranged inside the mounting seat, sliding rods are symmetrically arranged on the connecting frame, the sliding rods pass through the side wall of the mounting seat and the connecting plate, and fastening plates are arranged at the ends of the sliding rods, and the sliding rods are fixedly connected to the connecting plate through the fastening plates.

[0013] Preferably, the elastic buffer assembly further comprises a push plate and a bottom plate, a longitudinal slide groove is arranged on the side of the connecting plate away from the fender, and the push plate is arranged inside the slide groove of the connecting plate; A longitudinal slide groove is arranged on the inner wall of the mounting seat away from the fender, the bottom plate is arranged on the slide groove of the inner wall of the mounting seat, and an elastic element for driving the push plate away from the bottom plate is arranged between the push plate and the bottom plate.

[0014] Preferably, the elastic element includes a sleeve arranged on the push plate, and a limiting rod arranged on the bottom plate, a limiting plate is arranged at the end of the limiting rod, the limiting plate is located inside the sleeve, a limiting ring is arranged at the end of the sleeve, and the inner diameter of the limiting ring is smaller than the outer diameter of the limiting plate; A spring is arranged inside the sleeve, one end of the spring contacts the limiting sheet, and the other end of the spring contacts the push plate.

[0015] Preferably, a threaded ring is rotatably arranged on the bottom plate, the limiting rod is threadedly connected to the threaded ring, and a guide rod is also arranged on the bottom plate, the guide rod is hexagonal and arranged coaxially with the threaded ring, and the guide rod passes through the limiting rod and is slidably connected thereto; A screw rod is provided on the base, and the screw rod is rotatably connected to the base. A first gear is sleeved on the screw rod, and the first gear is fixedly connected to the screw rod. A second gear is sleeved on the threaded ring, and the second gear is fixedly connected to the threaded ring. The first gear and the second gear are connected by chain transmission.

[0016] Preferably, a sealing strip is arranged around the outer edge of the connecting plate, and the connecting plate is slidably and sealingly connected to the inner wall of the mounting seat.

[0017] Beneficial effects of the present invention: 1. When the ship docks, the fender of the present invention buffers the impact force generated by the ship to a certain extent. Then, as the impact force is transmitted, the elasticity of the spring and the generated compression deformation cooperate with the airbag to buffer the impact force transmitted to the fender. The recovery of the distance between the fender and the mounting seat also requires the airbag to restore its initial state accordingly. Therefore, the airbag needs to slowly restore the expansion state, which limits the pushing force of the spring, so that the recovery of the distance between the fender and the mounting seat is slower than the reduction, thereby avoiding the transmission of the excessively fast rebound force to the ship to cause unnecessary movement; 2. The bearing force of the fender when hit by a ship can be controlled by controlling the compression degree of the spring. Specifically, the staff rotates the screw rod through a tool, and the screw rod rotates and drives the first gear to rotate with it. The first gear drives the second gear to rotate with it through a chain. Since the second gear is sleeved on the threaded ring and the second gear is fixedly connected to the threaded ring, the second gear will drive the threaded ring to rotate. Since the limit rod is threadedly connected to the threaded ring, a guide rod is also provided on the bottom plate. The guide rod is hexagonal and coaxially arranged with the threaded ring. The guide rod passes through the limit rod and is slidably connected with the limit rod, so the limit rod will move axially along the guide rod; the limit rod will push the spring in the sleeve to a compressed or extended state through the limit plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 is a side view of the present invention; Figure 3 A top view of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the airbag of the present invention; Figure 5 The internal structure of the present invention is shown in FIG. Figure 1 ; Figure 6 for Figure 5 A magnified image of point A; Figure 7 The internal structure of the present invention is shown in FIG. Figure 2 ; Figure 8 It is a cross-sectional view of the internal structure of the present invention and a schematic diagram of its local structure.

[0020] In the figure: 1-mounting seat; 2-fender; 21-ear plate; 3-connecting frame; 31-connecting column; 32-nut; 33-side plate; 34-sliding rod; 35-fastening plate; 4-elastic buffer assembly; 41-push plate; 42-seat plate; 421-threaded ring; 422-guide rod; 423-second gear; 43-elastic element; 431-sleeve; 432-limiting ring; 433-limiting rod; 434-limiting plate; 435-spring; 44-screwing rod; 441-first gear; 45-chain; 5-airbag; 51-air inlet; 511-first one-way valve; 512-first flow control valve; 52-air outlet; 521-second one-way valve; 522-second flow control valve; 6-connecting plate; 61-sealing strip. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] The first aspect of the present invention provides a marine rubber fender 2, such as Figures 1 to 3 As shown, it includes a mounting seat 1 and a fender 2 for collision contact; An elastic buffer component 4 is disposed inside the mounting seat 1 to form a buffer distance between the fender 2 and the mounting seat 1; An airbag 5 is arranged between the mounting seat 1 and the fender 2. The airbag 5 is connected to the inner wall of the fender 2 and the mounting seat 1 respectively. The airbag 5 is provided with an air inlet 51 and an air outlet 52. The air intake rate of the airbag 5 is lower than its air outlet rate.

[0024] like Figure 1 As shown, further: The fender 2 is made of rubber material and has a trapezoidal structure. Ear plates 21 are arranged on both sides of the bottom surface of the trapezoidal fender 2 , and an inner groove is arranged on the bottom surface of the trapezoidal fender 2 .

[0025] like Figure 4 As shown, further: The air inlet 51 of the airbag 5 is provided with a first one-way valve 511 and a first flow control valve 512 in sequence, and the opening of the first one-way valve 511 faces the inside of the airbag 5 .

[0026] like Figure 4 As shown, further: The air outlet 52 of the airbag 5 is provided with a second one-way valve 521 and a second flow control valve 522 in sequence, and the opening of the second one-way valve 521 faces the outside of the airbag 5; The flow rate passing through the first flow control valve 512 is smaller than that passing through the second flow control valve 522 .

[0027] like Figure 3 and Figure 5 As shown, further: A connecting frame 3 is provided between the fender 2 and the mounting seat 1, and a connecting column 31 is provided on one side of the connecting frame 3. The connecting columns 31 are distributed on the upper and lower sides of the connecting frame 3, and the connecting columns 31 penetrate the ear plates 21 on both sides of the fender 2, and the connecting columns 31 are fixedly connected to the ear plates 21 through nuts 32; Side plates 33 are provided on both sides of the connecting frame 3 , and the side plates 33 extend into the inner groove of the fender 2 . One end of the airbag 5 is in the inner groove of the fender 2 and fixedly connected to the side plates 33 , and the other end of the airbag 5 is fixedly connected to the outer wall of the mounting seat 1 .

[0028] like Figure 6 As shown, further: The mounting seat 1 has a rectangular structure, and a connecting plate 6 is arranged inside the mounting seat 1. The connecting plate 6 is arranged inside the mounting seat 1. Sliding rods 34 are symmetrically arranged on the connecting frame 3. The sliding rods 34 pass through the side wall of the mounting seat 1 and the connecting plate 6. Fastening plates 35 are arranged at the ends of the sliding rods 34. The sliding rods 34 are fixedly connected to the connecting plate 6 through the fastening plates 35.

[0029] like Figure 7 As shown, further: The elastic buffer assembly 4 also includes a push plate 41 and a bottom plate. A longitudinal slide groove is provided on the side of the connecting plate 6 away from the fender 2, and the push plate 41 is arranged inside the slide groove of the connecting plate 6; A longitudinal slide groove is provided on the inner wall of the mounting seat 1 away from the fender 2 , the bottom plate is provided on the slide groove of the inner wall of the mounting seat 1 , and an elastic element 43 is provided between the push plate 41 and the bottom plate to drive the push plate 41 away from the bottom plate.

[0030] like Figure 8 As shown, further: The elastic element 43 includes a sleeve 431 disposed on the push plate 41, and a limiting rod 433 disposed on the bottom plate, a limiting piece 434 is disposed at the end of the limiting rod 433, and the limiting piece 434 is located inside the sleeve 431, and a limiting ring 432 is disposed at the end of the sleeve 431, and the inner diameter of the limiting ring 432 is smaller than the outer diameter of the limiting piece 434; A spring 435 is disposed inside the sleeve 431 , one end of the spring 435 contacts the limiting piece 434 , and the other end of the spring 435 contacts the push plate 41 .

[0031] In this embodiment, when the fender 2 is hit by a ship, the impact force generated by the ship is firstly buffered by the fender 2 made of rubber material. Then, as the impact force is transmitted, it is transmitted from the fender 2 to the connecting frame 3, the sliding rod 34, the connecting plate 6, and finally to the push plate 41. Since there is an elastic element 43 between the push plate 41 and the seat plate 42, the push plate 41 will transmit the pressure to the spring 435 after being stressed. The impact force transmitted from the fender 2 is buffered by the elasticity of the spring 435 and the generated compression deformation. In this process, the airbag 5 also plays the role of buffering the impact force. Although the airbag 5 has its air outlet 52, since the air outlet 52 is provided with a second flow control valve 522, when the exhaust rate is less than the deformation rate of the airbag 5, the airbag 5 will also have the effect of bearing pressure and buffering, and can produce better shock absorption under the joint action of the airbag 5 and the spring 435, and absorb the collision energy between the ship and the dock or between the ship when docking or mooring to the maximum extent; In order to prevent the ship from leaving the dock or making unnecessary movements due to the rebound force generated by the spring 435 after the ship collides with the dock, the following method will be used to solve the problem. After the ship completes the collision with the fender 2, the pressure applied to the spring 435 stops, and the stored potential energy is converted into kinetic energy, so that the spring 435 returns to its original position or length; in this process, the role of the airbag 5 will intervene. Since one end of the airbag 5 is in the inner groove of the fender 2 and is fixedly connected to the side plate 33, and the other end of the airbag 5 is fixedly connected to the outer wall of the mounting seat 1, in the process of restoring the distance between the fender 2 and the mounting seat 1, the airbag 5 needs to also restore its own expansion state at the same time; The force in the process of restoring the distance between the fender 2 and the mounting seat 1 lies in the driving of the spring 435. The spring 435 pushes the push plate 41 against the limit plate 434, and the push plate 41 pushes the connecting plate 6 to sequentially transmit the sliding rod 34, the connecting frame 3, and finally to the fender 2, so that the fender 2 is away from the mounting seat 1 and the distance between the two is restored; in the process of restoring the distance between the fender 2 and the mounting seat 1, since the air inlet 51 of the airbag 5 is sequentially provided with a first one-way valve 511 and a first flow control valve 512, and the opening of the first one-way valve 511 faces the inside of the airbag 5, the air intake rate of the airbag 5 is lower than its air outlet rate, and the distance between the fender 2 and the mounting seat 1 is restored. The airbag 5 needs to restore its initial state accordingly. Therefore, the airbag 5 needs to slowly restore its expanded state, so that the pushing force of the spring 435 is limited, so that the recovery of the distance between the fender 2 and the mounting seat 1 is slower than the reduction, thereby avoiding the excessively fast rebound force from being transmitted to the ship to cause unnecessary movement; As the number of times the spring is used increases, the spring needs to undergo a large amount of elastic deformation and recovery. After each deformation, the spring will partially recover to its original shape, but due to the gradual loss of material, the recovery amplitude will become smaller and smaller, causing the elasticity of the spring to gradually weaken. In the end, the spring may not be able to recover to its original length or shape; this elastic buffer component can be replaced in a timely manner very conveniently, so that the fender is always in the best buffering state and reduce the economic loss of overall replacement.

[0032] As an implementation method, Figure 8 As shown, further: The bottom plate is rotatably provided with a threaded ring 421, the limiting rod 433 is threadedly connected with the threaded ring 421, and the bottom plate is further provided with a guide rod 422, the guide rod 422 is hexagonal and is coaxially arranged with the threaded ring 421, and the guide rod 422 penetrates the limiting rod 433 and is slidably connected with the limiting rod 433; A screw rod 44 is provided on the base, and the screw rod 44 is rotatably connected to the base. A first gear 441 is sleeved on the screw rod 44, and the first gear 441 is fixedly connected to the screw rod 44. A second gear 423 is sleeved on the threaded ring 421, and the second gear 423 is fixedly connected to the threaded ring 421. The first gear 441 and the second gear 423 are connected through a chain 45.

[0033] In this embodiment, a convex strip is provided inside the mounting seat 1 to control the movement range of the connecting plate 6; In order to improve the tolerance of the present solution to ship collision, since the reaction of the spring 435 is no longer linear, a small force may be required to compress it a little in the early stage, but as the compression increases, the reaction force provided by the spring 435 becomes larger and larger, and a greater force is required to continue to press it down; According to the above principle, the compression degree of the spring 435 can be controlled to control the bearing force of the fender 2 when it is hit by a ship. Specifically, the staff rotates the screw rod 44 through a tool, and the screw rod 44 rotates and drives the first gear 441 to rotate with it. The first gear 441 drives the second gear 423 to rotate with it through the chain 45. Since the second gear 423 is sleeved on the threaded ring 421 and the second gear 423 is fixedly connected to the threaded ring 421, the second gear 423 will drive the threaded ring 421 to rotate. Since the limiting rod 433 is threadedly connected to the threaded ring 421, a guide rod 422 is also provided on the bottom plate. The guide rod 422 is hexagonal and is coaxially arranged with the threaded ring 421. The guide rod 422 penetrates the limiting rod 433 and is slidably connected thereto, so the limiting rod 433 will move axially along the guide rod 422. The limiting rod 433 pushes the spring 435 in the sleeve 431 to a compressed or extended state through the limiting plate 434 .

[0034] As an implementation method, Figure 6 As shown, further: A sealing strip 61 is arranged around the outer edge of the connecting plate 6 , and the connecting plate 6 is slidably and sealingly connected to the inner wall of the mounting seat 1 .

[0035] In this embodiment, in order to prevent water from flowing into the interior of the mounting seat 1 through the sliding rod 34 and corroding the spring 435, a sealing strip 61 is wrapped around the outer edge of the connecting plate 6 and a sliding seal is formed with the interior of the mounting seat 1 to prevent water from intruding.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0037] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A marine rubber fender (2), characterized in that: It comprises a mounting seat (1) and a fender (2) for collision contact; An elastic buffer component (4) is arranged inside the mounting seat (1) to form a buffer distance between the fender (2) and the mounting seat (1); An air bag (5) is arranged between the mounting seat (1) and the fender (2), the air bag (5) being connected to the inner wall of the fender (2) and the mounting seat (1) respectively, the air bag (5) being provided with an air inlet (51) and an air outlet (52), and the air inlet rate of the air bag (5) being lower than the air outlet rate thereof.

2. A marine rubber fender (2) according to claim 1, characterized in that: The fender (2) is made of rubber material and has a trapezoidal structure. Ear plates (21) are arranged on both sides of the bottom surface of the trapezoidal fender (2), and an inner groove is opened on the bottom surface of the trapezoidal fender (2).

3. A marine rubber fender (2) according to claim 2, characterized in that: The air inlet (51) of the airbag (5) is provided with a first one-way valve (511) and a first flow control valve (512) in sequence, and the opening of the first one-way valve (511) faces the interior of the airbag (5).

4. A marine rubber fender (2) according to claim 3, characterized in that: The air outlet (52) of the airbag (5) is provided with a second one-way valve (521) and a second flow control valve (522) in sequence, and the opening of the second one-way valve (521) faces the outside of the airbag (5); The flow rate passing through the first flow control valve (512) is smaller than that passing through the second flow control valve (522).

5. The marine rubber fender (2) according to claim 2, characterized in that: A connecting frame (3) is provided between the fender (2) and the mounting seat (1), and a connecting column (31) is provided on one side of the connecting frame (3). The connecting columns (31) are distributed on the upper and lower sides of the connecting frame (3), and the connecting columns (31) penetrate the ear plates (21) on both sides of the fender (2), and the connecting columns (31) are fixedly connected to the ear plates (21) via nuts (32); Side plates (33) are provided on both sides of the connecting frame (3), and the side plates (33) extend into the inner groove of the fender (2). One end of the airbag (5) is located in the inner groove of the fender (2) and is fixedly connected to the side plates (33), and the other end of the airbag (5) is fixedly connected to the outer wall of the mounting seat (1).

6. A marine rubber fender (2) according to claim 5, characterized in that: The mounting seat (1) has a rectangular structure. A connecting plate (6) is arranged inside the mounting seat (1). The connecting plate (6) is arranged inside the mounting seat (1). Sliding rods (34) are symmetrically arranged on the connecting frame (3). The sliding rods (34) penetrate the side wall of the mounting seat (1) and the connecting plate (6). A fastening plate (35) is arranged at the end of the sliding rod (34). The sliding rod (34) is fixedly connected to the connecting plate (6) via the fastening plate (35).

7. A marine rubber fender (2) according to claim 6, characterized in that: The elastic buffer assembly (4) further comprises a push plate (41) and a bottom plate, a longitudinal slide groove is provided on a side of the connecting plate (6) away from the fender (2), and the push plate (41) is arranged inside the slide groove of the connecting plate (6); A longitudinal slide groove is provided on the inner wall of the mounting seat (1) away from the fender (2), the bottom plate is arranged on the slide groove of the inner wall of the mounting seat (1), and an elastic element (43) is provided between the push plate (41) and the bottom plate for driving the push plate (41) away from the bottom plate.

8. A marine rubber fender (2) according to claim 7, characterized in that: The elastic element (43) comprises a sleeve (431) arranged on the push plate (41), and a limiting rod (433) arranged on the bottom plate, a limiting plate (434) being arranged at the end of the limiting rod (433), the limiting plate (434) being located inside the sleeve (431), and a limiting ring (432) being arranged at the end of the sleeve (431), the inner diameter of the limiting ring (432) being smaller than the outer diameter of the limiting plate (434); A spring (435) is disposed inside the sleeve (431), one end of the spring (435) is in contact with the limiting plate (434), and the other end of the spring (435) is in contact with the push plate (41).

9. A marine rubber fender (2) according to claim 8, characterized in that: A threaded ring (421) is rotatably arranged on the bottom plate, the limiting rod (433) is threadedly connected to the threaded ring (421), and a guide rod (422) is also arranged on the bottom plate. The guide rod (422) is hexagonal and is coaxially arranged with the threaded ring (421). The guide rod (422) passes through the limiting rod (433) and is slidably connected thereto; A screw rod (44) is provided on the base, and the screw rod (44) is rotatably connected to the base; a first gear (441) is sleeved on the screw rod (44), and the first gear (441) is fixedly connected to the screw rod (44); a second gear (423) is sleeved on the threaded ring (421), and the second gear (423) is fixedly connected to the threaded ring (421); the first gear (441) and the second gear (423) are transmission-connected via a chain (45).

10. The marine rubber fender (2) according to claim 6, characterized in that: A sealing strip (61) is arranged around the outer edge of the connecting plate (6), and the connecting plate (6) is slidably and sealingly connected to the inner wall of the mounting seat (1).

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