Lifting hook

Abstract

The utility model discloses a lifting hook, and relates to the technical field of lifting hooks, the lifting hook comprises a lifting ring connected with a lifting device, the lifting ring is provided with a lifting hook, and an anti-falling plate is rotatably arranged at an opening of the lifting hook; the lifting hook is fixedly sleeved with an elastic sleeve for hanging a lifting rope, and limiting baffles are arranged at the positions, located at the two ends of the elastic sleeve, of the lifting hook; the anti-falling plate is rotationally arranged at the opening of the lifting hook and can be automatically closed after the lifting rope is hung, so that the lifting rope is prevented from accidentally separating from the lifting hook; the elastic sleeve can increase the friction force between the elastic sleeve and the lifting rope and is matched with the limiting baffles at the two ends of the elastic sleeve, transverse displacement of the lifting rope caused by shaking of the heavy object is limited from the contact surface friction layer and the physical blocking layer, the lifting stability of the heavy object is effectively improved, the unhooking risk is reduced, and the safety of lifting operation is guaranteed.

Description

Technical Field

[0001] This application relates to the field of lifting hook technology, and in particular to a lifting hook. Background Technology

[0002] In modern industrial production, construction, and logistics, crane hooks serve as crucial lifting tools, undertaking vital tasks such as material lifting, handling, and unloading. As industries continuously demand higher efficiency and safety in lifting operations, the technological development of crane hooks has garnered increasing attention. Their performance directly impacts the smooth progress of operations and is crucial for personnel safety and stable equipment operation. Therefore, in-depth research and continuous optimization of crane hook technology are of significant practical importance.

[0003] Currently, widely used lifting hooks primarily lift heavy objects by attaching ropes or chains. Their basic structure typically includes a hook body and an anti-detachment device. The hook body, as the core load-bearing component, is forged or rolled from high-strength steel to ensure sufficient strength and toughness; the anti-detachment device prevents the rope or chain from accidentally coming off. During operation, one end of the rope or chain is fixed to the load, and the other end is hooked to the hook body. The crane's lifting mechanism then drives the hook, thus achieving the vertical lifting of the load.

[0004] Regarding the aforementioned technologies, the inventors believe that in actual hoisting operations, when a heavy object sways due to external interference or improper crane operation, the lateral force generated by the swaying, caused by the sliding friction between the hook and the rope, will cause the rope or chain to shift laterally within the hook. This not only disrupts the stability of the hoisting operation and increases the risk of the object becoming detached, but also affects the safety of the hoisting operation. Utility Model Content

[0005] The purpose of this application is to provide a lifting hook to improve the safety of lifting operations when the load is affected by external interference or improper crane operation, and the lateral component of the swaying force causes the rope or chain to shift laterally in the hook.

[0006] This application provides a lifting hook, which adopts the following technical solution:

[0007] A lifting hook includes a lifting ring connected to a lifting device, the lifting ring being provided with a hook, and an anti-derailment plate being rotatably provided at the opening of the hook; the hook is fixedly fitted with an elastic sleeve for attaching a lifting rope, and limiting baffles are provided at both ends of the elastic sleeve.

[0008] By adopting the above technical solution, an anti-detachment plate is rotatably installed at the opening of the hook, which can automatically close after the lifting rope is attached, helping to prevent the lifting rope from accidentally detaching from the hook; the elastic sleeve can increase the friction between the elastic sleeve and the lifting rope, and together with the limiting baffles at both ends of the elastic sleeve, it restricts the lateral displacement of the lifting rope caused by the swaying of the heavy object from two aspects: contact surface friction and physical obstruction, effectively improving the stability of the lifting of heavy objects, reducing the risk of detachment, and ensuring the safety of lifting operations.

[0009] Optionally, the hook is threaded to both ends of the elastic sleeve with sleeves, and the limiting baffle is located on the side wall of the sleeve.

[0010] By adopting the above technical solution, the sleeve is set to facilitate the rotation and adjustment of the position of the limit baffle. When hooking, the limit baffle is rotated to the outside of the hook to facilitate the hooking of the lifting rope.

[0011] Optionally, the limiting baffles are bent and the ends of the two limiting baffles away from the sleeve are positioned directly above the elastic sleeve and fit together.

[0012] By adopting the above technical solution, the limiting baffle is bent and fits together directly above the elastic sleeve to form a closed limiting space, which makes the limiting of the lifting rope more comprehensive and tighter, further improving the restraint effect on the lifting rope. Even if the heavy object shakes significantly, the lifting rope can be better kept in a fixed position in the hook, ensuring the safety of lifting.

[0013] Optionally, the hook is provided with a baffle plate that can fit against the sleeve on the side of the sleeve away from the elastic sleeve.

[0014] By adopting the above technical solution, when the sleeve is tightened, the baffle plate and the end face of the sleeve are tightly abutted, which helps to prevent the sleeve from loosening or rotating due to vibration and other factors during hoisting. It also helps to fix the position of the limit baffle, maintain the effectiveness of the limit structure, reduce the possibility of limit failure due to sleeve loosening, and provide reliable protection for lifting operations.

[0015] Optionally, the hook is provided with a fixing groove for the elastic sleeve to be fitted and fixed.

[0016] By adopting the above technical solution, the elastic sleeve is fixed in the fixed groove, making the connection between the elastic sleeve and the hook more stable, reducing the possibility of relative slippage or detachment of the elastic sleeve during hoisting, and ensuring that the elastic sleeve can continuously and stably play its role in increasing friction and limiting the hoisting rope.

[0017] Optionally, the top surface of the elastic sleeve is provided with a recessed groove that is recessed toward its center.

[0018] By adopting the above technical solution, the central groove can accurately position the lifting rope, allowing it to fall naturally into the groove and restricting its lateral movement. At the same time, the shape of the central groove can make the lifting rope more evenly stressed, further reducing the impact of the lateral force generated by the swaying of the heavy object on the position of the lifting rope and improving the stability of the lifting operation.

[0019] Optionally, a magnetic element is provided at the end of the anti-detachment plate away from its rotating end.

[0020] By adopting the above technical solution, when the anti-detachment plate is closed, the magnetic component is attracted to the surface of the hook. Based on the return spring, an additional locking mechanism is added to the anti-detachment plate, reducing the possibility of the anti-detachment plate being accidentally opened due to external vibration, collision and other factors. This helps to ensure that the lifting rope is always in the closed hook space, greatly improving the anti-detachment safety of the hook.

[0021] Optionally, the lifting ring includes a hanging ring and a lifting ring seat, wherein the lifting ring seat is provided with a fixing nut that is threadedly connected to the lifting hook.

[0022] By adopting the above technical solution, the threaded connection facilitates the installation and disassembly of the hook, and makes it convenient for later maintenance and replacement.

[0023] In summary, this application includes at least one of the following beneficial technical effects of lifting hooks:

[0024] 1. An anti-detachment plate is installed at the opening of the hook, which can automatically close after the lifting rope is attached, helping to prevent the lifting rope from accidentally detaching from the hook; the elastic sleeve can increase the friction between the lifting rope and the lifting rope, and together with the limiting baffles at both ends of the elastic sleeve, it limits the lateral displacement of the lifting rope caused by the swaying of the load from both the contact surface friction and physical blocking levels, effectively improving the stability of the lifting of the load, reducing the risk of detachment, and ensuring the safety of the lifting operation;

[0025] 2. The limiting baffles are bent and fit together directly above the elastic sleeve to form a closed limiting space, which makes the limiting of the lifting rope more comprehensive and tighter, further improving the restraint effect on the lifting rope. Even if the heavy object swings significantly, it can better maintain the fixed position of the lifting rope in the hook and ensure the safety of lifting.

[0026] 3. When the sleeve is tightened, the baffle plate and the end face of the sleeve are tightly abutted, which helps to prevent the sleeve from loosening or rotating due to vibration and other factors during hoisting. It also helps to fix the position of the limit baffle, maintain the effectiveness of the limit structure, reduce the possibility of limit failure due to sleeve loosening, and provide reliable protection for lifting operations. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the lifting hook;

[0028] Figure 2This is a schematic diagram illustrating the fixed groove structure in the embodiment.

[0029] In the diagram, 1. Lifting ring; 11. Hanging ring; 12. Lifting ring seat; 13. Fixing nut; 2. Lifting hook; 21. Fixing groove; 22. Rotating seat; 3. Anti-detachment plate; 31. Magnetic component; 4. Elastic sleeve; 41. Central recess; 5. Sleeve; 51. Limiting baffle; 6. Barrier plate. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2 This application will be described in further detail below.

[0031] A type of lifting hook 2, as shown in the reference Figure 1 The system includes a lifting ring 1 connected to the lifting device. The lifting ring 1 consists of a hanging ring 11 and a lifting ring seat 12, which are fixedly connected by welding. The hanging ring 11 is used to connect to the wire rope or other connecting components of the lifting device. A hook 2 is provided on the lifting ring 1, and the hook 2 is threadedly connected to the lifting ring seat 12. Specifically, the top of the hook 2 has an external thread, and the lifting ring seat 12 has a corresponding internal thread hole. The hook 2 is screwed into the internal thread hole of the lifting ring seat 12 by rotation and then tightened with a fixing nut 13. The fixing nut 13 engages with the external thread on the top of the hook 2, and tightening prevents the hook 2 from loosening and falling off.

[0032] Reference Figure 1 At the opening of the hook 2, an anti-detachment plate 3 is rotatably connected via a pin. This pin passes through the anti-detachment plate 3 and the corresponding rotating seat 22 at the opening of the hook 2, allowing the anti-detachment plate 3 to rotate freely around the pin. A return spring (not shown in the figure) is installed on the anti-detachment plate 3. One end of the return spring is fixed to the anti-detachment plate 3, and the other end is fixed to the hook 2. When the anti-detachment plate 3 is opened, it can automatically return to its original position under the action of the return spring, closing the opening of the hook 2 and preventing the lifting rope from accidentally coming off. A magnetic component 31 is provided at the end of the anti-detachment plate 3 away from its rotating end. This magnetic component 31 is a permanent magnet and is fixed to the anti-detachment plate 3 by adhesive. When the anti-detachment plate 3 is closed, the magnetic component 31 can attract the surface of the hook 2. The hook 2 is made of metal or alloy material, further enhancing the stability of the anti-detachment plate 3 after it is closed.

[0033] Reference Figure 1 , Figure 2An elastic sleeve 4, made of elastic rubber, is fixedly fitted onto the hook 2 for attaching the lifting rope. This elastic sleeve 4 increases the friction between the hook and the lifting rope. A fixing groove 21 is provided on the hook 2 for securing the elastic sleeve 4. The shape of the fixing groove 21 matches the shape of the elastic sleeve 4, and the elastic sleeve 4 is inserted into the fixing groove 21 through an interference fit for a secure installation. A recessed groove 41 is provided on the top surface of the elastic sleeve 4, which serves to limit the movement of the lifting rope and reduce lateral movement of the rope on the hook 2.

[0034] Reference Figure 1 , Figure 2 The hook 2 is provided with limiting baffles 51 at both ends of the elastic sleeve 4 to limit the lateral displacement of the lifting rope. The hook 2 is also threadedly connected to the sleeve 5 at both ends of the elastic sleeve 4. The internal thread of the sleeve 5 is engaged with the external thread on the hook 2. The position of the sleeve 5 on the hook 2 can be adjusted by rotating the sleeve 5. The limiting baffles 51 are welded to the side wall of the sleeve 5.

[0035] Reference Figure 1 , Figure 2 The hook 2 is located on the side of the sleeve 5 away from the elastic sleeve 4, and a baffle 6 is provided that can fit against the sleeve 5. The baffle 6 and the hook 2 are an integral structure. When the sleeve 5 is tightened, the baffle 6 can fit tightly against the end face of the sleeve 5 to prevent the sleeve 5 from continuing to rotate and ensure the stability of the limiting structure. The limiting baffle 51 is bent and when the ends of the two limiting baffles 51 away from the sleeve 5 are directly above the elastic sleeve 4, they fit together to form a closed limiting space, further enhancing the limiting effect on the lifting rope.

[0036] The implementation principle of this application embodiment is as follows:

[0037] In actual use, the hook 2 is connected to the lifting device through the hanging ring 11 of the lifting ring 1. During lifting, one end of the lifting rope is fixed to the heavy object, and the other end is hooked to the elastic sleeve 4 of the hook 2. When hooking, the limiting baffle 51 is rotated to the outside of the hook 2 by rotating the sleeve 5. After hooking, it is rotated back to make the two limiting baffles 51 fit together. The anti-detachment plate 3 closes the opening of the hook 2 under the action of the return spring, and the magnetic part 31 is attracted to the hook 2. When the heavy object sways, the friction between the elastic sleeve 4 and the lifting rope hinders the lateral sliding. At the same time, the limiting baffle 51 and the baffle 6 combine to limit the lifting rope, reduce its lateral movement, maintain the lifting stability, and ensure the safety of operation.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lifting hook comprising a shackle (1) for connection to a lifting device, characterised in that: The lifting ring (1) is provided with a hook (2), and an anti-detachment plate (3) is rotatably provided at the opening of the hook (2); the hook (2) is fixedly fitted with an elastic sleeve (4) for attaching the lifting rope, and a limiting baffle (51) is provided at both ends of the elastic sleeve (4) of the hook (2).

2. A lifting hook according to claim 1, characterized in that: The hook (2) is located at both ends of the elastic sleeve (4) and is threadedly connected to the sleeve (5). The limiting baffle (51) is located on the side wall of the sleeve (5).

3. A lifting hook according to claim 2, characterised in that: The limiting baffles (51) are bent and the ends of the two limiting baffles (51) away from the sleeve (5) are located directly above the elastic sleeve (4) and fit together.

4. A lifting hook according to claim 3, characterised in that: The hook (2) is provided with a baffle (6) on the side of the sleeve (5) away from the elastic sleeve (4) that can abut against the sleeve (5).

5. A lifting hook according to claim 2, characterised in that: The hook (2) is provided with a fixing groove (21) for the elastic sleeve (4) to be fitted and fixed.

6. A lifting hook according to claim 5, characterised in that: The top surface of the elastic sleeve (4) is provided with a recessed groove (41) that is recessed toward its center.

7. A lifting hook according to claim 1, characterized in that: The anti-detachment plate (3) has a magnetic element (31) at the end away from its rotating end.

8. A lifting hook according to claim 1, characterized in that: The lifting ring (1) includes a hanging ring (11) and a lifting ring seat (12), and the lifting ring seat (12) is provided with a fixing nut (13) that is threadedly connected to the hook (2).

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