Marine gangplank recycling limiting device

Abstract

The marine springboard recycling limiting device comprises a springboard body and a fixing frame, the springboard body is transversely and rotatably arranged on the side portion of a ship body, a first limiting lock is arranged on the side portion of the fixing frame, an opening and a C-shaped groove are formed in the extending end of the fixing frame, a locking block is rotatably arranged in the C-shaped groove, and a first inclined face is arranged at the far end of the first limiting lock; the springboard body is provided with a second limiting lock which is centrosymmetric with the first limiting lock; the lock block of the first and / or second limiting lock is connected with a reset device; and when the two limiting locks are connected, the first inclined surface guides the locking block of the second limiting lock to rotate to a splicing state, and the resetting device drives the two locking blocks to rotate and lock in the C-shaped groove. And it is ensured that the springboard can accurately stop at the preset limit position during recovery, the deviation risk of a traditional recovery limiting device is eliminated, and the reliability of the marine springboard recovery device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ship gangplanks, and in particular to a ship gangplank recovery and limiting device. Background Art

[0002] In port logistics and ship transportation, to achieve rapid vehicle loading and unloading, dock cranes are often used for lifting operations, or dedicated ramps are installed on ships for loading and unloading. Ramp loading and unloading is widely used due to its high flexibility, fast scheduling, and significant loading and unloading efficiency. Compared to crane lifting, ramp loading and unloading requires less demanding dock equipment and does not require reliance on large lifting machinery, thus reducing infrastructure investment costs and improving operational convenience. Ramp systems are primarily driven by two methods: cylinder drive and wire rope drive. Cylinder drive offers stable performance but is expensive and complex. In contrast, wire rope drive is easy to maintain, inexpensive, and more suitable for mid- and low-end 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 attached to a winch, and the other end is connected to a ramp. A limit switch is installed on the winch to control the ramp's movement limits. This limit mechanism effectively ensures the ramp stays in the designated position initially. However, over time, due to mechanical wear, seawater corrosion, or prolonged vibration, the limit switch can become loose, causing the limit position to shift. This can prevent the ramp from accurately stopping at its limit position.

[0004] In summary, an innovative recovery limit device is urgently needed. The device can prevent the limit position from shifting and ensure that the springboard stops accurately at the limit position. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and improve the technical problem of the deviation of the limiting device of the existing marine gangway.

[0006] To achieve the above objectives, the present invention provides the following technical solutions.

[0007] In a first aspect, the present invention provides a ship ramp recovery limit device, comprising a ramp body and a fixing frame, wherein the ramp body is arranged to rotate laterally on the side of the hull, and is characterized in that a first limit lock is provided on the side of the fixing frame; the first limit lock extends out of the edge of the fixing frame, the first limit lock is provided with an opening, and a locking block is rotatably provided on the inner side of the opening through a C-shaped groove, and a first inclined surface is provided on one end of the first limit lock away from the C-shaped groove and the fixing frame; a second limit lock is provided in a centrally symmetrical manner between the first limit lock of the ramp body and the fixing frame; the locking block of at least one of the first limit lock and the second limit lock is connected to a reset device; when the first limit lock and the second limit lock are connected to each other, the first inclined surface guides the locking block of the second limit lock to rotate to a connected state, and when the locking blocks of the first limit lock and the second limit lock are spliced, the reset device causes the two locking blocks to rotate a certain angle in 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 set on the first limit lock or the second limit lock with the locking block as the axis. One side of the connecting rod is hinged to one end of the 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 above technical features, the first limit lock of the device is provided with a first inclined surface, and the second limit lock is arranged in a centrally symmetrical manner. When the gangway is recovered, the first inclined surface interacts with the locking block of the second limit lock, guiding the locking block to rotate to 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 limit locks are arranged to rotate through C-shaped grooves. When assembled, the reset device rotates the locking blocks to a certain angle to achieve the locked state. In the dynamic environment of the ship, initial positioning can be quickly achieved, the recovery time can be shortened, and operational efficiency can be improved.

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

[0011] In order to allow the locking block to completely slide in the C-shaped groove, that is, to rotate along the C-shaped groove inside the C-shaped groove, maintain stable rotation, and prevent the locking block from falling out, as a preferred technical solution, the locking block is provided with a notch on its circumference, and a stop block adapted to the notch is provided in the opening, so that the stop block can slide in the C-shaped groove without falling out.

[0012] In order to improve the stable connection between the locking block in the first limit lock and the second limit lock, reduce the risk of frictional misalignment, and improve the matching degree, as a preferred technical solution, a positioning boss is provided at the end of the locking block, the lower bottom surface of the positioning boss coincides with the end surface of the locking block, and the positioning boss and the locking block are integrally connected.

[0013] In order to improve the stable connection between the locking block in the first limit lock and the second limit lock, so that the two locking blocks can form a three-dimensional interlocking, as a preferred technical solution, the joint surface of the locking block of the first limit lock and the locking block of the second limit lock is a chimeric structure.

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

[0015] In order to reduce the alignment accuracy of the springboard body and the fixing frame when they are assembled during the rotational connection, as a preferred technical solution, the first limit lock and the fixing frame are connected via a mounting seat, and the mounting seat and the first limit lock are rotatably arranged via a limit bearing.

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

[0017] As a preferred technical solution, the mounting seat is arranged on the fixing frame by means of bolts, and a buffer block is provided between the mounting seat and the fixing frame.

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

[0019] In a second aspect, a ship gangway is provided, comprising a recovery limit device according to at least one of the above-mentioned technical features.

[0020] The advantages and beneficial effects of the present invention are as follows: through the cooperation of the first limit lock and the second limit lock, the first inclined surface is used to guide the locking block to rotate to the connected state, and combined with the reset device, automatic locking is achieved. This ensures that the springboard can accurately stop at the preset limit position during recovery, thereby improving operational reliability. The device adopts a C-shaped groove and limit block design to prevent the locking block from falling off. The limit bearing and stop plate provide an adaptive rotation range of 0-30°, reducing maintenance frequency and cost. The reset device ensures the automation of the locking process and reduces human intervention. At the same time, the design of the mounting seat and buffer block absorbs impact force and improves the stability of the device in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 Schematic diagram of the internal structure of the first limit lock of the present invention; Figure 3Schematic diagram of the unlocked state of the first limit lock and the second limit lock of the present invention; Figure 4 Schematic diagram of the locked state of the first limit lock and the second limit lock of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the mounting base of the present invention; Reference numerals: 1- springboard body, 2- fixing frame, 3- first limit lock, 4- opening, 5- C-shaped groove, 6- lock 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 DESCRIPTION

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] like Figure 1-4 As shown, the present invention provides a shipboard ramp recovery and positioning device. A mounting bracket 2 is fixed to the side of the ship's hull, and a first positioning lock 3 is mounted on the side of the mounting bracket 2. The first positioning lock 3 extends beyond the edge of the mounting bracket 2 and serves as a fixed reference point when the ramp body 1 is recovered. The ramp body 1 is pivotally mounted on the ship's hull between the two mounting brackets 2, allowing it to be recovered or deployed laterally. A second positioning lock 8 is positioned on the ramp body 1, symmetrically with the first positioning lock 3 of the mounting brackets 2. This symmetrical design ensures precise alignment of the two during connection.

[0025] A first limit lock 3 is installed on the side of the fixed frame 2. The first limit lock 3 has an opening 4, a C-shaped groove 5 is located inside the opening 4, and a locking block 6 is rotatably mounted therein, allowing the locking block 6 to slide and rotate within the C-shaped groove 5. A first inclined surface 7 is provided on the end of the first limit lock 3, away from the C-shaped groove 5 and the fixed frame 2, for guiding the locking block 6 of the second limit lock 8 into the connected state. A second limit lock 8 is installed on the side of the springboard body. When connected to the first limit lock 3, the second limit lock 8 and the first limit lock 3 are arranged in a centrally symmetrical manner. The second limit lock 8 includes a similar opening 4, C-shaped groove 5, and locking block 6.

[0026] The locking block 6 of at least one of the first and second limit locks 3, 8 is connected to a reset device. This reset device rotates the locking block 6 to a certain angle during assembly to lock the springboard body 1. When the springboard body 1 is retracted and moved toward the fixed frame 2, the first inclined surface 7 of the first limit lock 3 contacts the locking block 6 of the second limit lock 8, guiding the locking block 6 of the second limit lock 8 to rotate into 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 springboard body 1 stops at the preset limit position.

[0027] The reset mechanism includes a connecting rod 9 extending outward from the locking block 6 of the first limit block 3. This connecting rod 9 passes through the C-shaped groove 5 and is pivotally mounted on the limit lock, with the locking block 6 as the axis. A spring 10 is hinged to one end of the connecting rod 9, and the other end of the spring 10 is hinged to the first limit lock 3. When the locking blocks 6 are assembled, the spring 10 provides a reset force that drives the locking blocks 6 to rotate. The locking blocks 6 are circumferentially provided with notches 11, and a limit block 12 is positioned within the opening 4 to fit within these notches 11. This limit block 12 prevents the locking blocks 6 from sliding within the C-shaped groove 5.

[0028] The end of the locking block 6 is provided with a positioning boss 13, whose lower surface coincides with the end surface of the locking block 6. The positioning boss 13 is integrally connected to the locking block 6, improving the matching accuracy between the first limit lock 3 and the second limit lock 8 and reducing frictional misalignment. The mating surfaces of the locking block 6 of the first limit lock 3 and the locking block 6 of the second limit lock 8 form a chimeric structure. The first limit lock 3 and / or the second limit lock 8 are provided with a second inclined surface 21, which forms a wedge-shaped structure at an angle with the first inclined surface 7, further optimizing the guidance process.

[0029] To enhance the device's flexibility 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 positioned between the mounting base 14 and the first limit lock 3, enabling adaptive positioning when the first limit lock 3 and the second limit lock 8 are assembled. The inner ring 16 of the limit bearing 15 is connected to the mounting base 14, while 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 retaining groove 19 is provided within the mounting base 14 to accommodate this stop plate 18. This stop plate 18 limits the rotation of the first limit lock 3 within a range of 0-30°. The mounting base 14 is bolted to the fixed frame 2, with a buffer block 20 positioned between them.

[0030] As a preferred embodiment, the switch of the recovery limit device shown in this device can be made of a lever extending from the connecting rod 11 through the first limit lock 3, or it can be realized by a paddle extending from the side of the lock block. To unlock, the lever or paddle is rotated to rotate the lock block.

[0031] It is worth noting that, in order to facilitate disassembly, the two locking blocks 6 in the present invention can be connected by a clearance fit, which is particularly suitable when the two also have a chimeric structure, and the clearance should be no less than 1-2 mm.

[0032] The operating principle of the present invention is that when the springboard body 1 begins to retract and rotates toward the fixed frame 2, the first limit lock 3 on the fixed frame 2 and the second limit lock 8 on the springboard body 1 approach each other. At this point, the first inclined surface 7 of the first limit lock 3 and the locking block 6 of the second limit lock 8 make initial contact. 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 limit locks rotate to a connected state. Simultaneously, the locking blocks 6 of the first limit lock 3 and the second limit lock 8 align with each other and engage. During this process, the notches 11 in the locking blocks 6 engage with the limiting blocks 12 in the opening 4, ensuring that the locking blocks 6 slide within the C-shaped groove 5 without falling out. The positioning bosses 13 provided at the ends of the locking blocks 6 improve the matching accuracy of the engaging surfaces. After the locking blocks 6 are engaged, a reset device drives the two locking blocks 6 to rotate a certain angle within the C-shaped groove 5, automatically completing the locked state.

[0033] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A ship-use ramp recovery and limiting device, comprising a ramp body (1) and a fixing frame (2), wherein the ramp body (1) is arranged on the side of the hull in a lateral rotation manner, and is characterized in that: A first limit lock (3) is provided on the side of the fixing frame (2); the first limit lock (3) extends out of the edge of the fixing frame (2); the first limit lock (3) is provided with an opening (4); a locking block (6) is provided on the inner side of the opening (4) through a C-shaped groove (5) for rotation; a first inclined surface (7) is provided on one end of the first limit lock (3) away from the C-shaped groove (5) and the fixing frame (2); a second limit lock (7) is provided on the springboard body (1) and the first limit lock (3) of the fixing frame (2) in a centrally symmetrical manner. The invention relates to a locking device for locking a plurality of locking members. The locking member (6) of the first limiting lock (3) and the second limiting lock (8) is connected to a reset device. When the first limiting lock (3) and the second limiting lock (8) are connected to each other, the first inclined surface (7) guides the locking member (6) of the second limiting lock (8) to rotate to a connected state. When the locking member (6) of the first limiting lock (3) and the second limiting lock (8) are assembled, the reset device causes the two locking members (6) to rotate a certain angle in the C-shaped groove (5) to achieve a locked state.

2. The ship ramp recovery and limiting device according to claim 1, characterized in that: The reset device comprises 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 arranged on the first limit lock (3) or the second limit lock (8) with the locking block (6) as an axis; one side of the connecting rod (9) is hinged to one end of a 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 ship ramp recovery and limiting device according to claim 2, characterized in that: The locking block (6) is provided with a notch (11) in the circumferential direction, 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 ship ramp recovery and limiting device according to claim 2, characterized in that: A positioning boss (13) is provided at the end of the locking block (6), the lower bottom surface of the positioning boss (13) coincides with the end surface of the locking block (6), and the positioning boss (13) and the locking block (6) are integrally connected.

5. The ship ramp recovery and limiting device according to claim 2, characterized in that: The joint surfaces of the locking block (6) of the first limiting lock (3) and the locking block (6) of the second limiting lock (8) are a chimeric structure.

6. The ship ramp recovery and limiting device according to claim 2, characterized in that: The first limit lock (3) and the fixing frame (2) are connected via a mounting seat (14); the mounting seat (14) and the first limit lock (3) are rotatably arranged via a limit bearing (15); the limit bearing (15) enables the first limit lock (3) and the second limit lock (8) to have a certain self-adaptive ability when they are assembled toward each other.

7. The ship ramp recovery and limiting device according to claim 6, characterized in that: The inner ring (16) of the limit bearing (15) is connected to the mounting seat (14), and the outer ring (17) is connected to the first limit lock (3). The outer ring (17) is provided with a stop plate (18) extending along the axial direction. A stop groove (19) adapted to the stop plate (18) is provided in the mounting seat (14). The stop plate (18) enables the first limit lock (3) to rotate within the range of 0-30 degrees.

8. The ship ramp recovery and limiting device according to claim 6, characterized in that: The mounting seat (14) is mounted on the fixing frame (2) via bolts, and a buffer block (20) is provided between the mounting seat (14) and the fixing frame (2).

9. The ship ramp recovery and limiting device according to claim 1, characterized in that: The first limit lock (3) and / or the second limit lock (8) is further provided with a second inclined surface (21), and the second inclined surface (21) forms a certain angle with the first inclined surface (7), so that the first limit lock (3) or the second limit lock (8) forms a wedge-shaped structure.

10. A marine gangway, characterized in that: A recovery limiter device according to any one of claims 1 to 9.

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