A marine gangway recovery limiting device

Abstract

This utility model provides a marine gangway retrieval limiting device, including a gangway body and a fixing frame. The gangway body is laterally rotatable on the side of the hull. The fixing frame has a first limiting lock on its side, with an opening and a C-shaped groove at its extended end. A locking block is rotatably disposed within the C-shaped groove. A first inclined surface is provided at the distal end of the first limiting lock. The gangway body has a second limiting lock symmetrical to the center of the first limiting lock. The locking blocks of the first and / or second limiting locks are connected to a reset device. When the two limiting locks are connected, the first inclined surface guides the locking block of the second limiting lock to rotate to the spliced ​​state, and the reset device drives the two locking blocks to rotate and lock within the C-shaped groove. This ensures that the gangway can accurately stop at a preset limit position during retrieval, eliminating the offset risk of traditional retrieval limiting devices and improving the reliability of the marine gangway retrieval device.

Description

Technical Field

[0001] This utility model relates to the field of marine gangplank technology, specifically to a marine gangplank retraction and limiting device. Background Technology

[0002] In port logistics and shipping, cranes at the dock are often used for lifting operations to achieve rapid loading and unloading of vehicles, or dedicated ramps are installed on ships for loading and unloading. Ramps are widely used due to their high flexibility, fast scheduling, and significant efficiency. Compared to crane lifting, ramp loading and unloading has lower requirements for dock equipment conditions and does not rely on large lifting machinery, thus reducing infrastructure investment costs and improving operational convenience. Ramps systems are mainly driven by two methods: hydraulic cylinder drive and wire rope drive. Hydraulic cylinder drive offers stable performance but is expensive and complex to manufacture. In contrast, wire rope drive is easier to maintain and less expensive, making it more suitable for low- to mid-range ship loading and unloading systems.

[0003] However, existing wire rope drive systems have significant technical drawbacks. In conventional designs, one end of the wire rope is mounted on a winch, and the other end is connected to the plank. Limit switches on the wire rope winch control the plank's extreme positions. While this limiting mechanism effectively ensures the plank stops at the designated position initially, over long-term use, mechanical wear, seawater corrosion, or prolonged vibration can cause the limit switches to loosen, leading to a shift in the limit position. This prevents the plank from accurately stopping at its extreme position.

[0004] In conclusion, there is an urgent need for an innovative recovery limiting device. This device can prevent the limiting position from shifting, ensuring that the ramp stops precisely at its extreme position. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and improve the technical problem of the offset of the limiting device of the existing marine gangway.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows.

[0007] In a first aspect, this utility model provides a boat ramp retrieval and limiting device, including a ramp body and a fixing frame. The ramp body is laterally rotatably disposed on the side of the hull. The device is characterized in that a first limiting lock is provided on the side of the fixing frame; the first limiting lock extends beyond the edge of the fixing frame and has an opening. A locking block is rotatably disposed inside the opening via a C-shaped groove. A first inclined surface is provided at the end of the first limiting lock away from the C-shaped groove and the fixing frame; a second limiting lock is centrally symmetrically disposed between the first limiting lock on the ramp body and the first limiting lock on the fixing frame; a reset device is connected to the locking blocks of at least one of the first and second limiting locks; when the first and second limiting locks are connected, the first inclined surface guides the locking block of the second limiting lock to rotate to a connected state; when the locking blocks of the first and second limiting locks are engaged, the reset device causes the two locking blocks to rotate a certain angle within the C-shaped groove to achieve a locked state.

[0008] As a preferred technical solution, the reset device includes a connecting rod extending outward from the locking block and passing through the C-shaped groove. The connecting rod is rotatably mounted on the first limit lock or the second limit lock with the locking block as its axis. One side of the connecting rod is hinged to one end of a spring, and the other end of the spring is hinged to the first limit lock or the second limit lock.

[0009] As an explanation, in the aforementioned technical features, the first limiting lock of the device has a first inclined surface, and the second limiting lock is arranged in a centrally symmetrical manner. When the ramp is retracted, the locking blocks of the first inclined surface and the second limiting lock interact, guiding the locking blocks to rotate into the connected state. This reduces the difficulty of manual alignment and avoids the tedious process of precise manual alignment required by traditional locks. The locking blocks of the first and second limiting locks are rotatably set through C-shaped grooves. During assembly, a reset device rotates the locking blocks at a certain angle to achieve the locking state. In the dynamic environment of a ship, this allows for rapid initial positioning, shortens retrieval time, and improves operational efficiency.

[0010] It is worth noting that the reset device can also be a pneumatic rod, hydraulic rod, or other device, which is connected to the industrial control board or pump body through a reversing valve to replace the function of a spring.

[0011] To ensure the locking block can slide completely within the C-groove, i.e., rotate steadily within it while maintaining rotational stability, and to prevent the locking block from falling off, a preferred technical solution is to provide a circumferential notch in the locking block, with a limiting block fitted within the notch. This limiting block allows the locking block to slide within the C-groove without falling off.

[0012] To improve the stable connection between the locking block and the second limiting lock in the first limiting lock, reduce the risk of frictional misalignment, and improve the matching degree, a preferred technical solution is to provide a positioning boss at the end of the locking block, with the lower bottom surface of the positioning boss coinciding with the end face of the locking block, and the positioning boss being integrally connected to the locking block.

[0013] To improve the stable connection between the locking blocks of the first and second limit locks, enabling them to form a three-dimensional interlock, a preferred technical solution is that the mating surfaces of the locking blocks of the first and second limit locks have an interlocking structure.

[0014] Among the above technical features, the interlocking structure includes, but is not limited to, concave-convex interlocking, such as dovetail grooves, wavy teeth, or stepped structures.

[0015] To reduce the alignment accuracy of the ramp body and the fixed frame during rotational connection, a preferred technical solution is that the first limit lock is connected to the fixed frame via a mounting base, and the mounting base and the first limit lock are rotatably configured via a limit bearing.

[0016] As a preferred technical solution, the inner ring of the limiting bearing is connected to the mounting base, and the outer ring is connected to the first limiting lock. A stop plate is provided on the outer ring extending axially. A stop groove adapted to the stop plate is provided in the mounting base. The stop plate enables the first limiting lock to rotate within the range of 0-30°.

[0017] As a preferred technical solution, the mounting base is bolted onto the fixed frame, and a buffer block is provided between the mounting base and the fixed frame.

[0018] As a preferred technical solution, the first limit lock and / or the second limit lock are further provided with a second inclined surface, the second inclined surface forming a certain angle with the first inclined surface, so that the first limit lock or the second limit lock forms a wedge structure.

[0019] In a second aspect, a marine gangway has the recovery limiting device described in at least one of the above-mentioned technical features.

[0020] The advantages and beneficial effects of this utility model are as follows: Through the cooperation of the first and second limit locks, the first inclined surface guides the lock block to rotate to the connected state, and automatic locking is achieved in conjunction with the reset device. This ensures that the ramp stops precisely at the preset limit position during retrieval, improving operational reliability. The device employs a C-groove and limit block design to prevent the lock block from falling off. The limit bearing and stop plate provide an adaptive rotation range of 0-30°, reducing maintenance frequency and costs. The reset device ensures automated locking, reducing human intervention; simultaneously, the design of the mounting base and buffer block absorbs impact forces, improving the stability of the device in harsh environments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the first limit lock of this utility model;

[0023] Figure 3 This is a schematic diagram of the unlocking state of the first and second limit locks of this utility model;

[0024] Figure 4 This is a schematic diagram of the locking states of the first limit lock and the second limit lock of this utility model;

[0025] Figure 5 This is a schematic diagram of the disassembly structure of the mounting base of this utility model;

[0026] Figure label:

[0027] 1-Pad body, 2-Fixing frame, 3-First limit lock, 4-Opening, 5-C-shaped groove, 6-Locking block, 7-First inclined surface, 8-Second limit lock, 9-Connecting rod, 10-Spring, 11-Notch, 12-Limit block, 13-Positioning boss, 14-Mounting seat, 15-Limit bearing, 16-Inner ring, 17-Outer ring, 18-Brake pad, 19-Stop groove, 20-Buffer block, 21-Second inclined surface. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] like Figure 1-4 As shown, this utility model provides a marine gangway retrieval and limiting device. A fixing frame 2 is fixed to the side of the hull, and a first limiting lock 3 is installed on its side. The first limiting lock 3 extends beyond the edge of the fixing frame 2 and serves as a fixed reference point when the gangway body 1 is retrieved. The gangway body 1 is rotatably mounted on the hull between the two fixing frames 2, and can be retrieved or deployed by lateral rotation. On the gangway body 1, a second limiting lock 8 is centrally symmetrically arranged with respect to the first limiting lock 3 of the fixing frame 2. This symmetrical design ensures precise alignment when the two are connected.

[0031] A first limiting lock 3 is provided on the side of the fixed frame 2. The first limiting lock 3 has an opening 4, a C-shaped groove 5 is provided inside the opening 4, and a locking block 6 is rotatably installed so that the locking block 6 can slide and rotate within the C-shaped groove 5. The end of the first limiting lock 3 away from the C-shaped groove 5 and the fixed frame 2 has a first inclined surface 7, which is used to guide the locking block 6 of the second limiting lock 8 into the connection state. A second limiting lock 8 is provided on the side of the ramp body. When the second limiting lock 8 is connected to the first limiting lock 3, the two are arranged in a centrally symmetrical manner. The second limiting lock 8 includes a similar opening 4, C-shaped groove 5, and locking block 6.

[0032] A reset device is connected to the locking block 6 of at least one of the first limit lock 3 and the second limit lock 8. The reset device causes the locking block 6 to rotate a certain angle during assembly to achieve locking. When the ramp body 1 retracts and approaches the fixing frame 2, the first inclined surface 7 of the first limit lock 3 contacts the locking block 6 of the second limit lock 8, and the first inclined surface 7 guides the locking block 6 of the second limit lock 8 to rotate to the connected state. After the locking blocks 6 of the two limit locks are assembled, the reset device drives the locking block 6 to rotate a certain angle within the C-shaped groove 5 to achieve the locked state, ensuring that the ramp body 1 stops at the preset limit position.

[0033] The reset device includes a connecting rod 9 extending outward from the locking block 6 of the first limiting block 3. The connecting rod 9 passes through the C-shaped groove 5 and is rotatably mounted on the limiting lock with the locking block 6 as its axis. A spring 10 is hinged to one side of the connecting rod 9, and the other end of the spring 10 is hinged to the first limiting lock 3. When the locking block 6 is engaged, the spring 10 provides a reset force to drive the locking block 6 to rotate. The locking block 6 has a notch 11 circumferentially provided, and a limiting block 12 adapted to the notch 11 is provided in the opening 4. The limiting block 12 allows the locking block 6 to slide within the C-shaped groove 5 without falling off.

[0034] A positioning boss 13 is provided at the end of the locking block 6, with its lower bottom surface coinciding with the end face of the locking block 6. The positioning boss 13 is integrally connected to the locking block 6 to improve the matching accuracy of the first limiting lock 3 and the second limiting lock 8 and reduce frictional misalignment. The mating surfaces of the locking blocks 6 of the first limiting lock 3 and the second limiting lock 8 are interlocking structures. The first limiting lock 3 and / or the second limiting lock 8 are provided with a second inclined surface 21, which forms a wedge structure at an angle to the first inclined surface 7 to further optimize the guiding process.

[0035] To improve the flexibility of the device in dynamic environments, the first limit lock 3 is connected to the fixed frame 2 via a mounting base 14. A limit bearing 15 is provided between the mounting base 14 and the first limit lock 3, enabling the first limit lock 3 to adapt when engaged with the second limit lock 8. The inner ring 16 of the limit bearing 15 is connected to the mounting base 14, and the outer ring 17 is connected to the first limit lock 3. A stop plate 18 extends axially from the outer ring 17, and a stop groove 19 adapted to the stop plate 18 is provided in the mounting base 14. The stop plate 18 restricts the first limit lock 3 from rotating within the range of 0-30°. The mounting base 14 is fixed to the fixed frame 2 by bolts, and a buffer block 20 is provided between the two.

[0036] As a preferred embodiment, the switch of the recycling limiting device shown in this apparatus can be made by a lever extending from the connecting rod 11 through the first limiting lock 3, or by a paddle extending from the side of the lock block. To unlock, the lever or paddle is rotated to rotate the lock block.

[0037] It is worth noting that in this utility model, the two locking blocks 6 can be connected by a gap fit in order to facilitate disassembly, which is especially suitable when the two also have an interlocking structure. The gap should not be less than 1-2mm.

[0038] The working principle of this invention is as follows: when the ramp body 1 begins to retract and rotates closer to the fixed frame 2, the first limiting lock 3 on the fixed frame 2 and the second limiting lock 8 on the ramp body 1 approach each other. At this time, the first inclined surface 7 of the first limiting lock 3 and the locking block 6 of the second limiting lock 8 make initial contact, and the wedge-shaped structure formed by the first inclined surface 7 and the second inclined surface 21 guides the locking block 6 to rotate inside the opening 4. The locking blocks 6 of the two limiting locks rotate to the connected state, and at the same time, the locking blocks 6 of the first limiting lock 3 and the second limiting lock 8 are aligned and joined together. During this process, the notch 11 on the locking block 6 cooperates with the limiting block 12 in the opening 4 to ensure that the locking block 6 slides in the C-shaped groove 5 without falling off. The positioning boss 13 is set at the end of the locking block 6, which improves the matching accuracy of the joining surface. After the locking blocks 6 are joined, the reset device drives the two locking blocks 6 to rotate a certain angle in the C-shaped groove 5, automatically completing the locking state.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A kind of marine springboard recovery limiting device, including springboard body (1) and fixed frame (2), the springboard body (1) is laterally rotated and arranged in the side of ship body, it is characterized by: A first limiting lock (3) is provided on the side of the fixed frame (2); the first limiting lock (3) extends out of the edge of the fixed frame (2), the first limiting lock (3) has an opening (4), a locking block (6) is rotatably provided on the inside of the opening (4) through a C-shaped groove (5), and a first inclined surface (7) is provided on the end of the first limiting lock (3) away from the C-shaped groove (5) and the fixed frame (2); the first limiting lock (3) of the ramp body (1) and the fixed frame (2) are provided with a second limiting lock in a centrally symmetrical manner. Position lock (8); at least one of the locking blocks (6) of the first limit lock (3) and the second limit lock (8) is connected to a reset device; when the first limit lock (3) and the second limit lock (8) are connected to each other, the first inclined surface (7) guides the locking block (6) of the second limit lock (8) to rotate to the connected state; when the locking blocks (6) of the first limit lock (3) and the second limit lock (8) are assembled, the reset device causes the two locking blocks (6) to rotate a certain angle in the C-shaped groove (5) to achieve the locking state.

2. The boat boarding ramp retraction limiting device of claim 1, wherein: The reset device includes a connecting rod (9) extending outward from the locking block (6) and passing through the C-shaped groove (5). The connecting rod (9) is rotatably mounted on the first limit lock (3) or the second limit lock (8) with the locking block (6) as the axis. One side of the connecting rod (9) is hinged to one end of the spring (10), and the other end of the spring (10) is hinged to the first limit lock (3) or the second limit lock (8).

3. The marine gangway recovery and limiting device according to claim 2, characterized in that: The locking block (6) has a notch (11) circumferentially provided, and a limiting block (12) adapted to the notch (11) is provided in the opening (4). The limiting block (12) enables the locking block (6) to slide in the C-shaped groove (5) without falling off.

4. The boat boarding ramp retraction limiting device of claim 2, wherein: The end of the locking block (6) is provided with a positioning boss (13), the bottom surface of the positioning boss (13) coincides with the end face of the locking block (6), and the positioning boss (13) is integrally connected with the locking block (6).

5. The boat boarding ramp retraction limiting device of claim 2, wherein: The mating surfaces of the locking block (6) of the first limiting lock (3) and the locking block (6) of the second limiting lock (8) are interlocking structures.

6. The boat boarding ramp retraction limiting device of claim 2, wherein: The first limit lock (3) is connected to the fixed frame (2) through the mounting base (14). The mounting base (14) and the first limit lock (3) are rotatably set through the limit bearing (15). The limit bearing (15) has a certain self-adaptive capability when the first limit lock (3) and the second limit lock (8) are assembled in opposite directions.

7. The boat boarding ramp retraction limiting device of claim 6, wherein: The inner ring (16) of the limiting bearing (15) is connected to the mounting base (14), and the outer ring (17) is connected to the first limiting lock (3). The outer ring (17) is provided with a stop plate (18) extending axially. The mounting base (14) is provided with a stop groove (19) adapted to the stop plate (18). The stop plate (18) enables the first limiting lock (3) to rotate within the range of 0-30°.

8. The boat boarding ramp retraction limiting device of claim 6, wherein: The mounting base (14) is bolted to the fixing frame (2), and a buffer block (20) is provided between the mounting base (14) and the fixing frame (2).

9. The boat boarding ramp retraction limiting device of claim 1, wherein: The first limiting lock (3) and / or the second limiting lock (8) are further provided with a second inclined surface (21) which is at an angle with the first inclined surface (7) so that the first limiting lock (3) or the second limiting lock (8) forms a wedge-shaped structure.

10. A marine jump deck characterized by: The recycling limiting device has the advantages that the recycling limiting device has the advantages that the recycling limiting device has the advantages that

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