Anti-drop locking protection mechanism for crane hook
By employing protective and anti-derailment components in the hook anti-derailment locking protection mechanism, the sliding friction between the sling and the hook body is transformed into rolling friction, solving the problem of breakage of the outer steel wire of the sling and achieving long-term stability of the sling and hook and equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN HANWEI LIFTING APP MFG CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-05-15
AI Technical Summary
The existing hook anti-derailment locking protection mechanism causes the outer steel wire of the sling to break due to repeated friction, affecting the long-term stability of the sling and hook.
By employing protective and anti-slip components, the sliding friction between the sling and the hook body is converted into rolling friction. The displacement of the sling and the slippage are limited by sleeves, rollers, anti-slip coatings and multiple protective structures.
Reduce wear on the surface of slings, extend the service life of slings and hooks, and improve the stability of equipment during use.
Smart Images
Figure CN224242546U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-derailment technology for crane hooks, and in particular to a crane hook anti-derailment locking and protection mechanism. Background Technology
[0002] The crane hook anti-detachment locking protection mechanism is a safety device installed on the hook. Its main function is to prevent the load from accidentally falling off during the lifting process, thereby ensuring the safe operation of the lifting operation.
[0003] Existing hook anti-detachment locking protection mechanisms close the hook opening with a locking device to prevent slings or heavy objects from coming off the hook due to shaking, collision, or other reasons. This prevents heavy objects from falling and causing safety accidents, reduces the occurrence of unexpected situations, and helps improve the safety of cranes during use.
[0004] However, in practical applications, existing hook anti-derailment locking protection mechanisms typically use locking devices to restrict the sling to the inside of the hook. However, this connection method makes the outer steel wire of the sling prone to breakage due to repeated friction, which may lead to wear and breakage of the sling. This is not conducive to improving the long-term use of the sling and hook, as well as the stability during use.
[0005] Therefore, this application provides a crane hook anti-detachment locking protection mechanism to meet the requirements. Utility Model Content
[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a crane hook anti-detachment locking protection mechanism.
[0007] To achieve the above objectives, this utility model adopts the following technical solution: a crane hook anti-detachment locking protection mechanism, comprising a hook body, and further comprising:
[0008] A protective component is placed on the hook body. The protective component includes a fixed shaft fixed inside the hook body, and a sleeve is provided on the outside of the fixed shaft.
[0009] An anti-detachment component is provided, which is placed at both ends of a protective component and is used to limit the displacement of the sling. The anti-detachment component includes side plates fixed to both ends of the sleeve, and threaded posts are connected to the side plates. Limiting plates are slidably connected to the threaded posts.
[0010] Furthermore, the middle part of the outer side of the sleeve has an arc-shaped groove structure.
[0011] The beneficial effect of adopting the above-mentioned further solution is that the arc-shaped groove guides the sling to move towards the middle of the sleeve, keeping the sling in a central position and preventing the sling from squeezing the side plate due to skewing.
[0012] Furthermore, the outer side of the fixed shaft is provided with an anti-slip coating.
[0013] The advantage of adopting the above-mentioned further solution is that it ensures that the sling can rotate together with the sleeve when it deflects.
[0014] Furthermore, an annular slider is connected to the side of the sleeve near the fixed shaft, and the sleeve is slidably connected to the fixed shaft through the annular slider.
[0015] The advantages of adopting the above-mentioned further solution are: ensuring the stability of the connection between the sleeve and the fixed shaft, limiting the rotation path of the sleeve, and preventing the sleeve from deviating.
[0016] Furthermore, rollers are rotatably connected to both ends of the fixed shaft, and the rollers are connected to the sleeve in a transmission connection.
[0017] The beneficial effect of adopting the above-mentioned further solution is that the roller reduces friction between the sleeve and the fixed shaft, allowing the sleeve to rotate smoothly.
[0018] Furthermore, the number of threaded posts on the side plate is three, and the three threaded posts are distributed in a ring array on the side plate.
[0019] The beneficial effect of adopting the above-mentioned further solution is that setting threaded posts in three directions and cooperating with limiting plates to restrict and protect the slings from multiple directions is conducive to further improving the anti-derailment effect.
[0020] Furthermore, a spring tongue is rotatably connected to the side of the hook body away from the fixed axis.
[0021] The beneficial effect of adopting the above-mentioned further solution is that the spring tongue and the limiting plate work together to form multiple layers of protection, further improving the anti-loosening effect.
[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0023] 1. By setting up protective components, when the sling is installed inside the hook body, it is mounted on the sleeve surface, thereby converting the sliding friction between the sling and the hook body into rolling friction, reducing the wear on the sling surface, and solving the problem of broken outer steel wires or even sling breakage caused by repeated friction. This not only protects the sling and hook and extends their service life, but also improves the stability of the equipment during use.
[0024] 2. By setting up an anti-slip component, first place the sling stably on the sleeve, then install the limiting plate on the threaded post and tighten it with a nut to restrict the sling on the sleeve, resist the influence of vibration, prevent the sling from separating from the sleeve, prevent the sling from slipping off, and enhance the stability of the hook body during use. Attached Figure Description
[0025] Figure 1 This is a front view of a crane hook anti-detachment locking protection mechanism according to this utility model;
[0026] Figure 2 This is a structural diagram of the protective component in a crane hook anti-detachment locking protection mechanism according to this utility model;
[0027] Figure 3 This is a cross-sectional view of the protective component in a crane hook anti-detachment locking protection mechanism of this utility model;
[0028] Figure 4 This is an exploded view of the protective components in a crane hook anti-detachment locking protection mechanism of this utility model;
[0029] Figure 5 This is a structural diagram of the anti-detachment component in a crane hook anti-detachment locking protection mechanism according to this utility model.
[0030] Figure Labels
[0031] 1. Hook body;
[0032] 2. Protective components; 21. Fixed shaft; 22. Sleeve; 23. Roller; 24. Annular slider; 25. Anti-slip coating; 26. Spring tongue;
[0033] 3. Anti-detachment component; 31. Side plate; 32. Limiting plate; 33. Threaded column. Detailed Implementation
[0034] 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.
[0035] like Figures 1-5 As shown, this utility model provides a technical solution: a crane hook anti-detachment locking protection mechanism, including a hook body 1, and further comprising:
[0036] like Figures 1-3 As shown, the protection component 2 is placed on the hook body 1. The protection component 2 includes a fixed shaft 21 fixed inside the hook body 1, and a sleeve 22 is provided on the outside of the fixed shaft 21.
[0037] like Figures 1-3As shown, the anti-detachment component 3 is placed at both ends of the protective component 2 and is used to limit the displacement of the sling. The anti-detachment component 3 includes side plates 31 fixed to both ends of the sleeve 22. Threaded posts 33 are connected to the side plates 31, and limit plates 32 are slidably connected to the threaded posts 33. By welding the fixed shaft 21 to the hook body 1 and sleeve 22 on the fixed shaft 21, when the sling is installed inside the hook body 1, the sling is positioned on the sleeve 22, converting the sliding friction between the sling and the hook body 1 into rolling friction, reducing the wear on the sling surface, and solving the problem of the outer steel layer of the sling. The wires are prone to breakage due to repeated friction, which may lead to wear and breakage of the sling. This method helps protect the sling and hook, improves their long-term use and stability during use. The side plate 31 is welded to both ends of the sleeve 22, and the threaded post 33 is welded to the side plate 31. First, the sling is placed on the sleeve 22, and then the limiting plate 32 is installed on the threaded post 33 and fixed with a nut to restrict the sling on the sleeve 22. This prevents the sling from separating from the sleeve 22 due to vibration and avoids the sling slippage, which helps improve the stability of the hook body 1 during use.
[0038] Furthermore, such as Figure 3 As shown, the middle part of the outer side of the sleeve 22 has an arc-shaped groove structure. By opening the arc-shaped groove on the outer side of the sleeve 22, the middle part of the sleeve 22 is lower than the two ends. When the sling is in use, the arc-shaped groove guides the sling to move towards the middle of the sleeve 22, keeping the sling in a central position and preventing the sling from squeezing the side plate 31 due to skewing.
[0039] Furthermore, such as Figure 2 As shown, the outer side of the fixed shaft 21 is provided with an anti-slip coating 25. By spraying the anti-slip coating 25 onto the outer surface of the sleeve 22, the friction between the sleeve 22 and the sling is increased, ensuring that the sling can drive the sleeve 22 to rotate together when it deviates.
[0040] Furthermore, such as Figure 4 As shown, an annular slider 24 is connected to the side of the sleeve 22 near the fixed shaft 21. The sleeve 22 is slidably connected to the fixed shaft 21 through the annular slider 24. By opening a groove on the fixed shaft 21 that matches the annular slider 24, the sleeve 22 rotates on the fixed shaft 21 along the groove through the annular slider 24, ensuring the stability of the connection between the sleeve 22 and the fixed shaft 21, and limiting the rotation path of the sleeve 22 to prevent the sleeve 22 from deviating.
[0041] Furthermore, such as Figure 3 As shown, both ends of the fixed shaft 21 are rotatably connected to rollers 23. The rollers 23 are connected to the sleeve 22 in a transmission connection. By opening a sliding groove on the sleeve 22 that matches the rollers 23, when the sleeve 22 rotates, the rollers 23 play a role in reducing friction between the sleeve 22 and the fixed shaft 21, so that the sleeve 22 can rotate smoothly.
[0042] Furthermore, such as Figure 5 As shown, three threaded posts 33 are provided on the side plate 31. The three threaded posts 33 are arranged in a ring array on the side plate 31. By setting the threaded posts 33 from three directions and cooperating with the limiting plate 32, the sling is restricted and protected from multiple directions, which helps to further improve the anti-derailment effect.
[0043] Furthermore, such as Figure 2 As shown, a spring tongue 26 is rotatably connected to the side of the hook body 1 away from the fixed shaft 21. By installing the spring tongue 26 on the hook body 1, when the sling is installed inside the hook body 1, the spring tongue 26 blocks the opening of the hook body 1 to prevent the sling from coming out from the inside of the hook body 1. In addition, the spring tongue 26 cooperates with the limiting plate 32 to form multiple protections, further improving the anti-loosening effect.
[0044] Working principle: such as Figures 1-5 As shown, the sling is first used to push the spring tongue 26 to open, and the hook body 1 is placed on the sleeve 22. The spring tongue 26 rebounds to seal the opening of the hook body 1. The arc groove on the sleeve 22 guides the sling to move towards the center. Then, the limiting plate 32 is installed on the side plate 31 and fixed with a nut to complete the installation and fixation of the sling, preventing the sling from slipping and improving the stability of the hook body 1 during use. When the sling slips during use, the additional friction provided by the anti-slip coating 25 causes the sling to drive the sleeve 22 to slide along the groove on the fixed shaft 21 through the annular slider 24. When the sleeve 22 slides, the roller 23 reduces the friction between the fixed shaft 21 and the sleeve 22, ensuring the stability of the sleeve 22's rotation. This converts the sliding friction between the sling and the hook body 1 into rolling friction, reducing wear on the sling surface and protecting the sling and hook, thus improving their long-term use.
[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A crane hook anti-detachment locking protection mechanism, comprising a hook body (1), characterized in that, Also includes: The protective component (2) is placed on the hook body (1). The protective component (2) includes a fixed shaft (21) fixed inside the hook body (1) and a sleeve (22) is provided on the outside of the fixed shaft (21). Anti-detachment component (3), the anti-detachment component (3) is placed at both ends of the protection component (2) and is used to limit the displacement of the sling. The anti-detachment component (3) includes side plates (31) fixed at both ends of the sleeve (22). Threaded columns (33) are connected to the side plates (31). Limiting plates (32) are slidably connected to the threaded columns (33).
2. The crane hook anti-detachment locking protection mechanism according to claim 1, characterized in that, The outer middle part of the sleeve (22) has an arc-shaped groove structure.
3. The crane hook anti-detachment locking protection mechanism according to claim 1, characterized in that, The outer side of the fixed shaft (21) is provided with an anti-slip coating (25).
4. The crane hook anti-detachment locking protection mechanism according to claim 1, characterized in that, An annular slider (24) is connected to the side of the sleeve (22) near the fixed shaft (21), and the sleeve (22) is slidably connected to the fixed shaft (21) through the annular slider (24).
5. The crane hook anti-detachment locking protection mechanism according to claim 1, characterized in that, Both ends of the fixed shaft (21) are rotatably connected to rollers (23), and the rollers (23) are connected to the sleeve (22) in a transmission connection.
6. The crane hook anti-detachment locking protection mechanism according to claim 5, characterized in that, The number of threaded posts (33) on the side plate (31) is three, and the three threaded posts (33) are arranged in a ring array on the side plate (31).
7. The crane hook anti-detachment locking protection mechanism according to claim 1, characterized in that, A spring tongue (26) is rotatably connected to the side of the hook body (1) away from the fixed shaft (21).