Lifting tool for repairing marine parts

Abstract

The utility model relates to the technical field of machining, and discloses a lifting tool for repairing marine parts, which comprises a trolley, a lifting device and a lifting device, the movable seat is connected with the top of the bracket in a sliding manner; the chain block is connected with the movable seat; the connecting plate is fixed to the moving seat, a mounting seat is fixed to the side wall of the bottom of the connecting plate, a chain wheel is rotationally arranged on the mounting seat, and the chain wheel is meshed with a hand pulling chain of the hand pulling block; the two limiting assemblies are arranged on the two side walls of the mounting base in a sliding mode, and the two limiting assemblies are used for limiting rotation of the chain wheel; and the power assembly is fixed to the side wall of the connecting plate, the power assembly is connected with the two limiting assemblies, and the power assembly is used for driving the limiting assemblies. The lifting tool for repairing the marine parts aims at solving the problem that according to an existing chain block, a chain is wound, and danger is caused by accidental damage of the chain block.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing technology, specifically to a lifting tool for repairing marine parts. Background Technology

[0002] Hand chain hoists are a type of manual lifting machinery that is simple to use and easy to carry. In the process of ship repair, since ship parts are generally large and made of metal alloys, hand chain hoists are widely used in the repair of ship parts.

[0003] In existing technologies, most manual chain hoists are used by fixing the hoist to a support, securing the hooks and components, and then pulling the chain to lift ship parts. Because the chain of a traditional manual chain hoist is not restricted, the chain and lifting chain inevitably come into contact during use, causing interference and affecting the hoist's normal operation. Furthermore, damage to the anti-return components (ratchet, ratchet, etc.) can cause the chain to move rapidly when heavy ship parts are lowered, potentially injuring workers. Utility Model Content

[0004] The purpose of this utility model is to solve the problems of chain entanglement and accidental damage to hand chain hoists, and to propose a marine component repair and lifting tool.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A marine component repair lifting fixture, comprising:

[0007] The trolley has a support rotatably mounted on its top.

[0008] A movable base, which is slidably connected to the top of the bracket;

[0009] A hand chain hoist, wherein the hand chain hoist is connected to a movable base;

[0010] A connecting plate is fixed to a movable seat. A mounting base is fixed to the bottom side wall of the connecting plate. A sprocket is rotatably mounted on the mounting base, and the sprocket meshes with the chain of the hand chain hoist.

[0011] Two limiting components are slidably disposed on two side walls of the mounting base, and the two limiting components are used to limit the rotation of the sprocket;

[0012] A power assembly is fixed to the side wall of the connecting plate and is connected to two limiting assemblies. The power assembly is used to drive the limiting assemblies.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, the trolley is equipped with casters at all four corners of its bottom, and multiple counterweights are fixed to one side of the top of the trolley.

[0015] Furthermore, the limiting component includes:

[0016] A limiting wheel is rotatably mounted on the side wall of the mounting base, and the limiting wheel and the sprocket are fixed.

[0017] A portal frame is slidably mounted on the side wall of the mounting base, and an arc-shaped plate is fixed to the inner wall of the portal frame near the limiting wheel.

[0018] Furthermore, the power assembly includes:

[0019] A fixing block is fixed to the side wall of the connecting plate, and a fixing hole is provided on the top of the fixing block;

[0020] A cylinder, which is fixed in a fixing hole.

[0021] Furthermore, the power assembly also includes:

[0022] A connecting frame is fixed to the telescopic end of the cylinder, and the connecting frame is fixed to two portal frames;

[0023] The control unit is fixed to the connecting plate and electrically connected to the cylinder.

[0024] Furthermore, the control unit includes:

[0025] A pivot, which is fixed to one of the limiting wheels;

[0026] Multiple reflectors are fixed at equal intervals on the rotating shaft;

[0027] A laser speed sensor is fixed to a connecting plate and is positioned near the rotating shaft.

[0028] Furthermore, the control unit also includes:

[0029] The controller is connected to the laser speed sensor via a signal line and is electrically connected to the cylinder.

[0030] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0031] This invention, through the design of a movable seat, connecting plate, mounting base, and sprocket, allows the position of the hand chain hoist to be changed during use by sliding between the movable seat and the bracket. Since the sprocket is connected to the movable seat through the mounting base and connecting plate, the sprocket remains relatively stationary with respect to the movable seat during the movement of the hand chain hoist. Furthermore, the hand chain is connected to the movable seat, and its chain engages with the sprocket. Therefore, the chain remains taut during both the movement of the hand chain hoist and the pulling of the chain, preventing interference between the chain and the lifting chain that could cause operational inconvenience. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0033] Figure 2 This is a schematic diagram of the movable base and connecting plate structure of this utility model;

[0034] Figure 3 This is the utility model Figure 2 A magnified view of the structure at point A in the middle;

[0035] Figure 4 This is a schematic diagram of the connecting plate, mounting base, and sprocket structure of this utility model;

[0036] Figure 5 This is a schematic diagram of the rotating shaft, limiting wheel, and sprocket structure of this utility model.

[0037] In the diagram: 1. Trolley; 2. Counterweight; 3. Bracket; 4. Moving seat; 5. Hand chain hoist; 6. Connecting plate; 7. Fixing block; 8. Cylinder; 9. Connecting frame; 10. Gantry frame; 11. Arc plate; 12. Limiting wheel; 13. Mounting seat; 14. Sprocket; 15. Shaft; 16. Reflector; 17. Laser speed sensor. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Combination Figures 1-5 As shown, this utility model provides a marine component repair lifting fixture, comprising:

[0040] Cart 1, with a bracket 3 rotatably mounted on its top;

[0041] The movable base 4 and the bracket 3 are slidably connected at the top.

[0042] Hand chain hoist 5, hand chain hoist 5 is connected to the movable base 4;

[0043] The connecting plate 6 and the movable seat 4 are fixed together. The bottom side wall of the connecting plate 6 is fixed with a mounting seat 13. A sprocket 14 is rotatably mounted on the mounting seat 13 and engages with the chain of the hand chain hoist 5.

[0044] Two limiting components are slidably disposed on the two side walls of the mounting base 13, and the two limiting components are used to limit the rotation of the sprocket 14;

[0045] The power assembly is fixed on the side wall of the connecting plate 6. The power assembly is connected to two limiting assemblies and is used to drive the limiting assemblies.

[0046] The trolley 1 serves as the mobile base for the entire tooling, allowing it to be easily moved to the vicinity of the ship parts requiring repair. A bracket 3 is rotatably mounted on the top of the trolley 1, providing stable support for subsequent lifting operations. Next, the movable seat 4 is slidably connected to the top of the bracket 3, allowing the movable seat 4 to move up and down along the bracket 3, thereby driving the connected hand chain hoist 5 to move together. The hand chain hoist 5, as the main lifting device, achieves lifting and lowering of parts through its internal lifting mechanism. Since the sprocket 14 and the hand chain are engaged, and the sprocket 14 remains relatively stationary with the movable seat 4 via the connecting plate 6 and the mounting base 13, the hand chain of the hand chain hoist 5 is always taut during operation and movement. This prevents inconvenience caused by the shaking of the hand chain, and also avoids frequent contact between the hand chain and the lifting chain, ensuring the normal movement of both.

[0047] The controller is connected to the laser speed sensor 17 via a signal line. The laser speed sensor 17, as the acquisition end of speed information, monitors the rotational speed of the sprocket 14 or the limiting wheel 12 in real time and sends this information to the controller in the form of an electrical signal. After receiving the signal, the controller will analyze and process it to determine whether the rotational speed of the sprocket 14 is within the safe range. The controller and the cylinder 8 are electrically connected to achieve control. When the controller determines that the rotational speed of the sprocket 14 exceeds the preset safety threshold, it will immediately issue a control command to the cylinder 8. After receiving the command, the cylinder 8's extension end begins to move, driving the connecting frame 9 and the two gantry frames 10 to descend. This reduces the rotational speed of the sprocket 14 through the friction between the arc plate 11 and the limiting wheel 12. The entire electrical control system requires a stable power supply to ensure the normal operation of each electrical component. Usually, the power supply is connected to the controller to provide the required power to the controller, laser speed sensor 17, cylinder 8, and other electrical components. It should be noted that the selection of the power supply should take into account parameters such as voltage, current, and power to ensure the stable operation and safety of the electrical components.

[0048] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 As shown, the trolley 1 is equipped with casters at all four corners of its bottom, and multiple counterweights 2 are fixed to one side of its top. The trolley 1 serves as the mobile platform for the entire marine component repair and lifting fixture. These casters allow the trolley 1 to move flexibly within the ship's interior or repair area, adapting to different working environments and terrains. Operators can easily push or pull the trolley 1 to quickly and accurately position it near the component requiring repair, greatly improving work efficiency. Simultaneously, to enhance the stability of the trolley 1 during movement, especially to prevent it from tipping over when carrying heavy components, the designers fixed multiple counterweights 2 to one side of the top of the trolley 1. These counterweights 2 effectively reduce the swaying of the trolley 1 during movement or lifting by increasing the gravitational torque at the bottom of the trolley 1, improving the overall stability of the fixture. Furthermore, the placement of the counterweights 2 on one side of the top of the trolley 1 also helps to balance the torque changes caused by the weight variations of the components during lifting, further enhancing the operational safety of the fixture.

[0049] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 , Figure 3 As shown; the limiting components include:

[0050] The limiting wheel 12 is rotatably mounted on the side wall of the mounting base 13, and the limiting wheel 12 and the sprocket 14 are fixed.

[0051] A gantry frame 10 is slidably mounted on the side wall of the mounting base 13. An arc-shaped plate 11 is fixed to the inner wall of the gantry frame 10 near the limiting wheel 12. During the descent of the gantry frame 10, the arc-shaped plate 11 is driven to abut against the limiting wheel 12. By increasing the friction between the arc-shaped plate 11 and the limiting wheel 12, the rotational speed of the limiting wheel 12 is reduced, thereby limiting the rotational speed of the sprocket 14 and thus limiting the movement speed of the hand chain.

[0052] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 , Figure 3 As shown; the power assembly includes:

[0053] Fixing block 7 is fixed to the side wall of connecting plate 6, and fixing hole is provided on the top of fixing block 7;

[0054] Cylinder 8 is fixed in a fixing hole. The position of cylinder 8 can be limited and fixed by a fixing block 7. The output end of cylinder 8 faces the end of the trolley 1.

[0055] In a preferred embodiment, this utility model can be further configured as follows: Figure 3 , Figure 4 As shown; the power assembly also includes:

[0056] Connecting frame 9 is fixed on the telescopic end of cylinder 8, and connecting frame 9 is fixed to two portal frames 10;

[0057] The control unit and the connecting plate 6 are fixed. The control unit and the cylinder 8 are electrically connected. During the displacement process, the cylinder 8 can drive the connecting frame 9 to move together. When the connecting frame 9 is displaced, the two portal frames 10 can move together with the connecting frame 9.

[0058] In a preferred embodiment, this utility model can be further configured as follows: Figure 4 , Figure 5 As shown; the control unit includes:

[0059] A rotating shaft 15 is fixed to one of the limiting wheels 12.

[0060] Multiple reflectors 16 are fixed at equal intervals on the rotating shaft 15;

[0061] A laser speed sensor 17 is fixed to the connecting plate 6 and positioned near the rotating shaft 15, which is fixed to one of the limiting wheels 12. This design ensures that the rotational speed of the shaft 15 is completely synchronized with that of the limiting wheel 12 and, consequently, the sprocket 14. When the sprocket 14 rotates due to the operation of the chain hoist 5, the limiting wheel 12 and the shaft 15 also rotate accordingly. To achieve accurate measurement of the rotational speed of the shaft 15, multiple reflectors 16 are fixed at equal intervals on the shaft 15. These reflectors 16 pass sequentially through the detection area of ​​the laser speed sensor 17 as the shaft 15 rotates. The design of the reflectors 16 not only improves the accuracy of the measurement but also enhances the laser speed sensor's detection through their reflective properties. The detection sensitivity of the laser speed sensor 17 is as follows: As another key component of the speed monitoring system, the laser speed sensor 17 is firmly fixed on the connecting plate 6 and positioned near the rotating shaft 15. Thus, when the rotating shaft 15 rotates, the reflector 16 fixed on it will sequentially cut off or reflect the laser beam emitted by the laser speed sensor 17. By receiving and analyzing the time interval of these reflected or cut-off signals, the laser speed sensor 17 can accurately calculate the rotation speed of the rotating shaft 15 and, consequently, the sprocket 14. Once the rotation speed of the sprocket 14 exceeds the preset safety range, the laser speed sensor 17 will activate the cylinder 8 to drive the limiting component, thereby increasing the friction to reduce the rotation speed of the sprocket 14 and preventing parts from falling rapidly due to damage to the internal parts of the hand chain hoist 5.

[0062] In a preferred embodiment, this utility model can be further configured as follows: Figure 4 , Figure 5 As shown; the control unit also includes:

[0063] The controller and laser speed sensor 17 are connected via signal lines. The controller and cylinder 8 are electrically connected. As the core component of the control unit, the controller undertakes the important task of receiving, processing, and issuing control commands. In this lifting fixture, the controller is connected to the laser speed sensor 17 via signal lines, forming a closed-loop control system for speed monitoring. The laser speed sensor 17, as the acquisition end for speed information, monitors the rotational speed of the sprocket 14 or the limiting wheel 12 in real time and sends this information to the controller in the form of an electrical signal. After receiving the speed signal sent by the laser speed sensor 17, the controller immediately analyzes and processes it. If the rotational speed of the sprocket 14 is within the normal range, the controller will maintain the current state and will not intervene. However, once the rotational speed of the sprocket 14 exceeds the preset safety threshold, it indicates that there may be damage to internal parts of the chain hoist 5 or rapid movement of components. If a safety hazard such as rapid descent is detected, the controller will immediately issue a control command. This control command is transmitted to cylinder 8 via an electrical connection. As an actuator, cylinder 8 responds quickly upon receiving the controller's command. Under the controller's control, the telescopic end of cylinder 8 begins to move, driving the connecting frame 9 and the two gantry frames 10 to descend. As the gantry frames 10 descend, the arc-shaped plate 11 on its inner wall gradually contacts the limiting wheel 12 and generates friction. This friction effectively reduces the rotational speed of the limiting wheel 12, thereby limiting the rotational speed of the sprocket 14. Through this series of chain reactions, the controller successfully controls the rotational speed of the sprocket 14 within a safe range, avoiding safety hazards such as the rapid fall of parts due to damage to the internal parts of the hand chain hoist 5. At the same time, the intervention of the controller also improves the safety and reliability of the entire lifting fixture, providing strong support for the repair work of ship parts.

[0064] The specific working principle of this utility model's marine component repair lifting fixture is as follows:

[0065] When performing repair work, first move the device to the part by moving the trolley 1, then fix the hook on the hand chain hoist 5 to the part, and then pull the hand chain of the hand chain hoist 5 to drive the movement of the lifting chain, thereby realizing the lifting and lowering of the part.

[0066] During the above process, due to the action of the connecting plate 6, the mounting base 13 and the sprocket 14, the hand chain is always kept in a taut state. As a result, the hand chain will not shake too much during the movement and lifting of parts, so as to avoid excessive contact and entanglement between the hand chain and the lifting chain, and ensure the smoothness of the operation.

[0067] During normal operation, the ratchet and other components inside the hand chain hoist 5 prevent the parts from falling during the lifting process. However, if the ratchet and other components in the hand chain hoist 5 are damaged due to improper maintenance, the parts will fall quickly. During this process, the operator only needs to release the chain.

[0068] After the hand chain is released, it moves rapidly during the descent of the parts, causing the sprocket 14 to rotate at an abnormal speed. During this process, the laser speed sensor 17, in conjunction with the reflector 16, constantly monitors the rotation speed of the shaft 15 and the sprocket 14. When the rotation speed of the sprocket 14 is too high, the laser speed sensor 17 sends a signal. After receiving the signal, the controller turns on the switch of the cylinder 8. When the cylinder 8 is working, it drives the connecting frame 9 to descend, which in turn drives the two portal frames 10 to descend, so that the arc plate 11 on the portal frame 10 abuts against the limiting wheel 12. The friction reduces the rotation speed of the limiting wheel 12, thereby limiting the rotation speed of the sprocket 14. Then, the hand chain limits the descent speed of the parts to prevent the parts from falling rapidly and being damaged due to the failure of the hand chain hoist 5.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting fixture for repairing marine components, characterized in that, include: The trolley (1) has a bracket (3) rotatably mounted on its top. The movable seat (4) and the bracket (3) are slidably connected at the top; A hand chain hoist (5) is connected to a movable base (4); A connecting plate (6) is fixed to a movable seat (4). A mounting seat (13) is fixed to the bottom side wall of the connecting plate (6). A sprocket (14) is rotatably mounted on the mounting seat (13), and the sprocket (14) meshes with the chain of the hand chain hoist (5). Two limiting components are slidably disposed on two side walls of the mounting base (13), and the two limiting components are used to limit the rotation of the sprocket (14); A power assembly is fixed on the side wall of the connecting plate (6). The power assembly is connected to two limiting assemblies and is used to drive the limiting assemblies.

2. The marine component repair lifting fixture according to claim 1, characterized in that, The trolley (1) is equipped with universal wheels at the four corners of its bottom, and multiple counterweights (2) are fixed on one side of the top of the trolley (1).

3. The marine component repair lifting fixture according to claim 1, characterized in that, The limiting components include: A limiting wheel (12) is rotatably mounted on the side wall of the mounting base (13), and the limiting wheel (12) and the sprocket (14) are fixed. A portal frame (10) is slidably mounted on the side wall of the mounting base (13), and an arc plate (11) is fixed on the inner wall of the portal frame (10) near the limiting wheel (12).

4. The marine component repair lifting fixture according to claim 3, characterized in that, The power assembly includes: A fixing block (7) is fixed on the side wall of the connecting plate (6), and a fixing hole is provided on the top of the fixing block (7); Cylinder (8), which is fixed in a fixing hole.

5. The marine component repair lifting fixture according to claim 4, characterized in that, The power assembly also includes: A connecting frame (9) is fixed on the telescopic end of the cylinder (8), and the connecting frame (9) and two portal frames (10) are fixed together; The control unit is fixed to the connecting plate (6) and electrically connected to the cylinder (8).

6. The marine component repair lifting fixture according to claim 5, characterized in that, The control unit includes: A rotating shaft (15) is fixed to one of the limiting wheels (12); Multiple reflectors (16) are fixed at equal intervals on the rotating shaft (15); A laser speed sensor (17) is fixed to a connecting plate (6), and the laser speed sensor (17) is located near the rotating shaft (15).

7. The marine component repair lifting fixture according to claim 6, characterized in that, The control unit further includes: The controller and the laser speed sensor (17) are connected by a signal line, and the controller and the cylinder (8) are electrically connected.

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