Fender device with anti-collision buffer structure

Abstract

The application relates to the technical field of fender technology, in particular to a fender device with an anti-collision buffer structure, which comprises a steel base plate, a plurality of bolt holes are formed in the surface of the steel base plate, a limiting sleeve is integrally formed on the surface of the steel base plate, a movable sleeve is sleeved outside the limiting sleeve, the length of the limiting sleeve is equal to the length of the movable sleeve; a rubber sleeve is fixed to one end of the movable sleeve close to the steel base plate, and the rubber sleeve is sleeved outside the limiting sleeve; beneficial effects are that the multiple-stage buffer structure and the double-limiting locking protection structure are provided, and the fender device has obvious technical advantages and practical value; the rubber sleeve, rubber supporting blocks and multiple spring buffer assemblies are matched and arranged between the steel base plate and the movable sleeve, a multi-stage buffer system combining rubber flexible buffering and spring elastic force relief is formed, and the multi-stage buffer system can layer by layer absorb and eliminate the instantaneous impact force generated when a ship is berthed.

Description

Technical Field

[0001] This invention relates to the field of fender technology, specifically to a fender device with a collision buffer structure. Background Technology

[0002] Fenders are essential collision buffer devices for docks and port berths. They are primarily used to absorb impact energy during ship berthing, preventing rigid contact between the ship and the dock, thus protecting the dock's main structure and the ship's hull and paint from collision damage. Currently, most existing fender structures are simple in design, often employing a single-layer rubber buffer or a simple spring buffer structure. With few buffer layers, their effectiveness in absorbing the instantaneous impact force generated during ship berthing is limited. Facing berthing impacts from ships of different tonnages and at different angles, their buffering adaptability is poor, easily leading to incomplete buffering and localized stress concentration, still posing a risk of ship collisions and dock damage.

[0003] Meanwhile, the external protective structure of traditional fenders has poor stability. After long-term exposure to wave impacts and ship compression and vibration, problems such as loosening, detachment, and displacement of the protective sleeve are prone to occur. Furthermore, the structural sealing performance is insufficient, allowing moisture and marine salt spray impurities to easily penetrate the internal structure of the fender, causing internal components to rust, jam, age, and fail, significantly shortening the fender's service life. In addition, existing fenders have poor reset performance; after repeated impacts, structural jamming and incomplete reset are likely to occur, making stable cyclic use impossible. The overall structural robustness, weather resistance, and cushioning durability are ill-suited to the complex working conditions of ports—humid, windy, and high-frequency operations—and exhibit significant technical deficiencies. Summary of the Invention

[0004] The purpose of this invention is to provide a fender device with a collision-resistant buffer structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fender device with an anti-collision buffer structure, comprising a steel base plate, wherein a plurality of bolt holes are formed on the surface of the steel base plate, a limiting sleeve is integrally formed on the surface of the steel base plate, a movable sleeve is fitted on the outer side of the limiting sleeve, the length of the limiting sleeve being equal to the length of the movable sleeve; a rubber sleeve is fixed to one end of the movable sleeve near the steel base plate, the rubber sleeve is fitted on the outer side of the limiting sleeve, and the end of the rubber sleeve away from the movable sleeve is fixed to the surface of the steel base plate; a rubber support block is fixedly installed between the inner wall of the movable sleeve and the steel base plate. The movable sleeve has several sleeves fixed to its inner wall. Each sleeve has a round opening at its end, into which a T-shaped guide rod is inserted. The diameter of the end of the guide rod extending into the sleeve is larger than the inner diameter of the round opening. A spring is fixedly connected between the guide rod and the inner wall of the movable sleeve. A convex-shaped rubber buffer cover is fitted on the outer side of the movable sleeve. One end of the rubber buffer cover is wrapped around a steel base plate, and the other end of the rubber buffer cover has a convex-shaped reserved opening. A threaded sleeve is fixed to the surface of the movable sleeve and is inserted into the reserved opening. An anti-loosening screw is threaded inside the threaded sleeve.

[0006] Preferably, a metal washer is fitted at the end of the threaded sleeve away from the movable sleeve. The thickness of the metal washer is greater than the depth to which the threaded sleeve extends into the larger end of the reserved opening. The metal washer is clamped and fixed between the anti-loosening screw and the end face of the reserved opening.

[0007] Preferably, the inner wall of the rubber buffer cover is provided with several annular slots, and the outer wall of the movable sleeve is fixedly fitted with a limiting ring, which is correspondingly engaged with the slot to achieve limiting cooperation.

[0008] Preferably, a plurality of the sleeves are evenly distributed in a ring on the inner wall of the movable sleeve, and the sleeves, guide rods and springs are matched and matched one-to-one to form multiple sets of synchronous buffer guide components.

[0009] Preferably, the rubber sleeve is an annular flexible sleeve structure, the rubber sleeve completely covers the fitting gap between the limiting sleeve and the movable sleeve, and both ends of the rubber sleeve are respectively sealed and fixedly connected to the movable sleeve and the steel base plate.

[0010] Preferably, the rubber support block is located at the center of the movable sleeve, and the rubber support block and the rubber sleeve cooperate with each other to form a double-layer flexible buffer bearing structure.

[0011] Preferably, the spring is always kept in a pre-tightened assembly state, and the spring, rubber sleeve and rubber support block work together to form a multi-level elastic buffer system.

[0012] Preferably, the inner diameter of the larger end of the reserved opening is larger than the outer diameter of the threaded sleeve, and the smaller end of the reserved opening is adapted to the gap of the outer wall of the threaded sleeve to achieve precise insertion and positioning of the threaded sleeve.

[0013] Preferably, the slot is an annular closed groove, the limiting ring is an elastic metal ring, and the limiting ring is interference-fitted with the slot to achieve circumferential limiting and axial anti-movement fixation of the rubber buffer cover and the movable sleeve.

[0014] Preferably, the metal gasket is a hard, rust-proof metal gasket, which is fitted to the pre-reserved end face to increase the locking force area of ​​the anti-loosening screw and improve the thread locking stability and anti-loosening effect.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The fender device with an anti-collision buffer structure proposed in this invention possesses significant technical advantages and practical value through its multi-layered, graded buffer structure and dual-limiting, locking protective structure. This invention forms a multi-level buffer system combining flexible rubber buffering and elastic spring stress relief by incorporating rubber sleeves, rubber supports, and multiple sets of spring buffer assemblies between the steel base plate and the movable sleeve. This system can absorb and dissipate the instantaneous impact force generated during ship berthing, effectively preventing damage to the hull and dock caused by rigid collisions. Simultaneously, the pre-tensioned reset characteristic of the springs ensures rapid reset of the device after impact, enabling long-term stable cyclic use. The convex-shaped rubber buffer cover provides large-area flexible protection on the outer side, effectively reducing the pressure on the hull and avoiding… It avoids damage to the ship's paint surface and can seal and shield the internal structure, preventing the intrusion of water vapor, salt spray, and impurities, significantly improving the device's corrosion resistance and anti-aging performance, and adapting to the complex operating environment of ports. In addition, through the annular locking cooperation of the limiting ring and the slot, as well as the threaded locking cooperation of the threaded sleeve, metal gasket, and anti-loosening screw, a double limiting and fixing structure is formed, which effectively solves the problem of easy loosening, displacement, and detachment of the traditional external protective structure of the fender. It greatly improves the assembly firmness and operational stability of the overall structure. With the equal-length guide structure of the limiting sleeve and the movable sleeve, it can ensure that the buffer extension and retraction movements are precise and regular, without displacement or jamming, further improving the overall anti-collision buffer performance, service life, and operational reliability of the device, making it more practical and adaptable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point AA; Figure 3 for Figure 2 Sectional view of the structure at point B; Figure 4 for Figure 2 Sectional view of the structure at point C; Figure 5 This is a schematic diagram of the connection structure between the movable sleeve and the limiting sleeve of the present invention; Figure 6This is a schematic diagram of the movable sleeve structure of the present invention; Figure 7 This is a schematic diagram of the connection structure between the steel substrate and the limiting sleeve of the present invention.

[0017] In the figure: steel base plate 1, bolt hole 101, limit sleeve 102, movable sleeve 2, rubber sleeve 201, rubber support block 202, limit ring 203, sleeve 3, guide rod 301, spring 302, rubber buffer cover 4, reserved opening 401, slot 402, threaded sleeve 5, metal gasket 501, anti-loosening screw 502. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 7 This invention provides a technical solution: a fender device with a collision buffer structure. This device is mainly used for collision buffer protection between the edge of the dock and the ship. It can effectively absorb the impact force generated by the ship berthing, avoiding rigid collision damage between the ship hull and the dock structure. The overall structure is stably assembled, with excellent buffer performance and strong protective durability. The main body of the device includes a steel base plate 1, which serves as the mounting base and bearing base of the entire fender device. Multiple bolt holes 101 are evenly opened on the surface of the steel base plate 1. The steel base plate 1 can be positioned and fixed at the edge of the dock through the bolt holes 101. In specific installation operations, installation holes can be pre-set at the edge of the dock corresponding to the bolt holes 101. Expansion connectors are passed through the bolt holes 101 and inserted and fixed inside the holes of the dock, so that the steel base plate 1 can be stably suspended and fixed at the designated position at the edge of the dock, providing a stable installation foundation for the subsequent buffer protection structure.

[0020] A limiting sleeve 102 is integrally formed on the surface of the steel substrate 1. The limiting sleeve 102 is a hollow cylindrical limiting structure that can provide precise guidance and limiting for the subsequent movable buffer structure, effectively preventing structural displacement and misalignment during the buffering process and ensuring the stability of the buffering action. A movable sleeve 2 is fitted on the outer side of the end of the limiting sleeve 102 away from the steel substrate 1, and the length of the limiting sleeve 102 is set to be equal to the length of the movable sleeve 2. This ensures that the movable sleeve 2 can achieve uniform telescopic sliding action throughout the entire process outside the limiting sleeve 102, with regular limiting stroke, further improving the operational stability of the structure. A rubber sleeve 201 is fixedly fitted at one end of the movable sleeve 2 near the steel base plate 1. The rubber sleeve 201 is entirely fitted on the outside of the limiting sleeve 102, and the other end of the rubber sleeve 201 is fixedly connected to the surface of the steel base plate 1. Through the flexible connection of the rubber sleeve 201, the sealing connection and initial buffer between the movable sleeve 2 and the steel base plate 1 can be achieved. At the same time, it can block the fit gap between the limiting sleeve 102 and the movable sleeve 2, and prevent moisture and impurities from entering the interior of the structure and causing corrosion and jamming problems.

[0021] A rubber support block 202 is fixedly installed between the inner wall of the movable sleeve 2 and the opposite end face of the steel base plate 1. As one of the core flexible buffer components, the rubber support block 202 forms a double-layer rubber buffer structure with the outer rubber sleeve 201. When the ship collides and squeezes the movable sleeve 2, the movable sleeve 2 slides and squeezes along the axial direction of the limiting sleeve 102 toward the steel base plate 1. This can simultaneously squeeze the rubber sleeve 201 and the rubber support block 202 to undergo elastic deformation. Through the elastic deformation of the rubber material, the impact force generated by the ship collision is effectively consumed and absorbed, thus initially achieving the anti-collision buffer effect, weakening the rigid collision force, and protecting the edge of the dock and the ship's hull structure from damage.

[0022] To further enhance the graded buffering capacity of the device, multiple sleeves 3 are fixed in a ring around the inner wall of the movable sleeve 2. Each sleeve 3 is evenly distributed within the inner wall of the movable sleeve 2, and each sleeve 3 has a circular insertion port at its free end, into which a guide rod 301 is inserted. The guide rod 301 is configured as a T-shaped circular rod structure, with the diameter of the rod extending into the inner side of the sleeve 3 larger than the diameter of the circular opening at the end of the sleeve 3. This structure provides a limiting stop for the guide rod 301, preventing it from slipping out of the sleeve 3 and ensuring the integrity and stability of the guiding structure. Simultaneously, a spring 302 is fixedly connected between the outer end of the guide rod 301 and the inner wall of the movable sleeve 2. The spring 302 is always in a pre-tightened assembly state, forming an elastic buffering system in conjunction with the rubber sleeve 201 and the rubber support block 202. During a ship collision, when the movable sleeve 2 is pressed and slides, it will simultaneously compress the spring 302. Through the elastic compression and reset deformation of the spring 302, the residual impact kinetic energy is further absorbed, achieving multi-stage buffering and force relief, which greatly improves the anti-collision buffering effect of the device. At the same time, the spring 302 can rely on its own elastic reset after the impact to drive the movable sleeve 2 back to the initial position, ensuring that the device can be reused repeatedly.

[0023] A rubber buffer cover 4 is fitted over the entire outer side of the movable sleeve 2. The rubber buffer cover 4 is designed with a convex circular structure, which has a large area of ​​flexible protection. This can further increase the contact buffer area between the device and the ship, reduce the local pressure on the ship, avoid damage to the hull paint and shell, and comprehensively improve the anti-collision buffer performance. One end of the rubber buffer cover 4 completely covers the outer surface of the steel base plate 1, which can seal and protect the steel base plate 1 and the bottom mounting structure, prevent the steel base plate 1 from rusting and aging due to long-term exposure to humid sea winds and water environment, and extend the service life of the device. The other end of the rubber buffer cover 4 has a reserved opening 401 at the center. The reserved opening 401 is designed with a convex circular structure. A threaded sleeve 5 is fixedly installed on the outer surface of the movable sleeve 2. The threaded sleeve 5 is inserted into the reserved opening 401 to achieve the initial positioning and assembly of the rubber buffer cover 4 and the movable sleeve 2.

[0024] To ensure a secure and locked rubber buffer cover 4, an anti-loosening screw 502 is threaded into the internal thread of the threaded sleeve 5. Simultaneously, a metal washer 501 is fitted onto the outer side of the end of the threaded sleeve 5 furthest from the movable sleeve 2. The thickness of the metal washer 501 is greater than the depth to which the threaded sleeve 5 extends into the larger end of the pre-reserved opening 401, allowing the metal washer 501 to be tightly clamped between the anti-loosening screw 502 and the end face of the pre-reserved opening 401. During assembly, the metal washer 501 is first fitted onto the end of the threaded sleeve 5, and then the anti-loosening screw 502 is locked in place by the threaded engagement of the threaded sleeve 5. The pressure-bearing and limiting effect of the metal washer 501 increases the locking contact area and improves locking stability, effectively preventing the anti-loosening screw 502 from loosening and slipping. This completely avoids displacement and detachment of the rubber buffer cover 4 during long-term vibration buffering, ensuring the overall structural integrity.

[0025] Meanwhile, the inner wall of the rubber buffer cover 4 is provided with multiple grooves 402 in a ring shape. The grooves 402 are designed as annular grooves, and each groove 402 has a corresponding limiting ring 203 inserted into it. The limiting ring 203 is fixedly fitted onto the outer wall of the movable sleeve 2. Through the annular locking cooperation between the limiting ring 203 and the groove 402, the circumferential positioning and axial limiting between the rubber buffer cover 4 and the movable sleeve 2 can be achieved, restricting the radial offset and axial movement of the rubber buffer cover 4. Together with the locking structure of the end threaded sleeve 5 and the anti-loosening screw 502, it forms a double limiting and fixing structure, ensuring the stability and reliability of the rubber buffer cover 4 assembly in all aspects, and ensuring that it can play a stable outer layer buffer protection role for a long time.

[0026] This fender device adopts a multi-layered, graded buffer structure. During use, when a ship berths at the collision device, the outer rubber buffer cover 4 first absorbs the impact force for primary buffering. Subsequently, the movable sleeve 2 is pressed and slides precisely along the limiting sleeve 102, simultaneously squeezing the rubber sleeve 201 and rubber support block 202 to achieve secondary buffering. At the same time, the internal spring 302 is compressed to complete tertiary buffering and force relief. Through the synergistic effect of multiple buffer structures, the impact force generated by the ship berthing can be reduced to the maximum extent, completely avoiding rigid collisions between the ship and the edge of the dock. Moreover, the overall structure is tightly assembled and firmly limited, with good anti-detachment, anti-corrosion, and anti-aging properties. It can adapt to the complex operating environment of the dock, which is humid and windy, and has excellent long-term stability.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fender device with a collision-resistant buffer structure, characterized in that: The system includes a steel substrate (1), on which several bolt holes (101) are formed. A limiting sleeve (102) is integrally formed on the surface of the steel substrate (1). A movable sleeve (2) is fitted on the outside of the limiting sleeve (102). The length of the limiting sleeve (102) is equal to the length of the movable sleeve (2). A rubber sleeve (201) is fixed to one end of the movable sleeve (2) near the steel substrate (1). The rubber sleeve (201) is fitted on the outside of the limiting sleeve (102), and the end of the rubber sleeve (201) away from the movable sleeve (2) is fixed to the surface of the steel substrate (1). A rubber support block (202) is fixedly installed between the inner wall of the movable sleeve (2) and the steel substrate (1). Several bolt holes (101) are fixed to the inner wall of the movable sleeve (2). A sleeve (3) has a round opening at its end, into which a T-shaped guide rod (301) is inserted. The diameter of the end of the guide rod (301) that extends into the sleeve (3) is larger than the inner diameter of the round opening. A spring (302) is fixedly connected between the guide rod (301) and the inner wall of the movable sleeve (2). A rubber buffer cover (4) with a convex structure is fitted on the outside of the movable sleeve (2). One end of the rubber buffer cover (4) is wrapped around a steel base plate (1), and the other end of the rubber buffer cover (4) has a convex structure reserved opening (401). A threaded sleeve (5) is fixed on the surface of the movable sleeve (2). The threaded sleeve (5) is inserted into the reserved opening (401), and an anti-loosening screw (502) is threaded inside the threaded sleeve (5).

2. The fender device with anti-collision buffer structure according to claim 1, characterized in that: A metal washer (501) is fitted on the end of the threaded sleeve (5) away from the movable sleeve (2). The thickness of the metal washer (501) is greater than the depth of the threaded sleeve (5) extending into the large end of the reserved opening (401). The metal washer (501) is clamped and fixed between the anti-loosening screw (502) and the end face of the reserved opening (401).

3. The fender device with anti-collision buffer structure according to claim 1, characterized in that: The inner wall of the rubber buffer cover (4) is provided with several annular slots (402), and the outer wall of the movable sleeve (2) is fixedly fitted with a limiting ring (203). The limiting ring (203) is correspondingly engaged with the slot (402) to achieve limiting cooperation.

4. The fender device with anti-collision buffer structure according to claim 1, characterized in that: Several sleeves (3) are evenly distributed in a ring on the inner wall of the movable sleeve (2), and the sleeves (3), guide rods (301) and springs (302) are matched and matched one by one to form multiple sets of synchronous buffer guide components.

5. The fender device with anti-collision buffer structure according to claim 1, characterized in that: The rubber sleeve (201) is a ring-shaped flexible sleeve structure. The rubber sleeve (201) completely covers the fitting gap between the limiting sleeve (102) and the movable sleeve (2), and the two ends of the rubber sleeve (201) are respectively sealed and fixedly connected to the movable sleeve (2) and the steel base plate (1).

6. The fender device with anti-collision buffer structure according to claim 1, characterized in that: The rubber support block (202) is located at the center of the movable sleeve (2). The rubber support block (202) and the rubber sleeve (201) cooperate with each other to form a double-layer flexible buffer bearing structure.

7. The fender device with anti-collision buffer structure according to claim 1, characterized in that: The spring (302) is always in a pre-tight assembly state. The spring (302), the rubber sleeve (201) and the rubber support block (202) work together to form a multi-level elastic buffer system.

8. The fender device with anti-collision buffer structure according to claim 1, characterized in that: The inner diameter of the larger end of the reserved opening (401) is larger than the outer diameter of the thread sleeve (5), and the smaller end of the reserved opening (401) is adapted to the gap between the outer wall of the thread sleeve (5).

9. The fender device with anti-collision buffer structure according to claim 3, characterized in that: The slot (402) is an annular closed groove, and the limiting ring (203) is an elastic metal ring. The limiting ring (203) and the slot (402) are press-fitted together to achieve circumferential limiting and axial anti-movement fixing of the rubber buffer cover (4) and the movable sleeve (2).

10. The fender device with anti-collision buffer structure according to claim 2, characterized in that: The metal gasket (501) is a hard, rust-proof metal gasket. The metal gasket (501) is fitted to the end face of the reserved opening (401) to increase the locking force area of ​​the anti-loosening screw (502).

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