Overload-preventing lifting hook device for tower crane
The anti-overload hook device, which combines a sliding component and a hydraulic cylinder, enables real-time overload monitoring and early warning of tower crane hooks. This solves the problem of difficulty in timely detection of overloads in existing technologies, and improves construction safety and equipment reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 山东中建众力机械工程有限公司
- Filing Date
- 2025-05-29
- Publication Date
- 2026-04-14
AI Technical Summary
Existing tower crane hook devices are difficult to detect overload in a timely manner, mechanical devices are easily overlooked, and electronic sensors are affected by electromagnetic interference, resulting in signal delays or false alarms. This leads to the continuous accumulation of overload risks and threatens construction safety.
The system employs a combination of sliding components and hydraulic cylinders. Overload is indicated by a sliding disc and a ball-operated trigger light, and the hook is locked in case of overload to prevent further loading. This combination of mechanical and electronic means enables real-time monitoring and early warning.
It enables timely alerts and prevention of hook overload, improving the timeliness and safety of the device and reducing the risk of equipment damage and accidents.
Smart Images
Figure CN224118602U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of anti-overload hook devices, and in particular to an anti-overload hook device for tower cranes. Background Technology
[0002] Tower cranes, as indispensable heavy equipment in modern construction, directly impact construction efficiency and personnel safety through the safety and reliability of their hook devices. In large-scale construction scenarios such as high-rise buildings and bridge projects, hooks often need to bear loads of several tons or even tens of tons. Overloading can easily lead to serious accidents such as wire rope breakage, structural deformation, or even crane overturning. While traditional hook devices have basic load-bearing capacity, they lack real-time monitoring and early warning mechanisms, making it difficult to cope with sudden overload conditions. With the increasing demand for intelligent construction, developing a hook device that integrates overload early warning and anti-disengagement functions has become an urgent need in the industry. Such devices need to ensure structural strength while achieving dynamic load monitoring through mechanical or electronic means, thereby providing operators with a window for timely intervention and reducing the risk of accidents.
[0003] Most existing tower crane hook devices adopt mechanical limit structures. Mechanical solutions usually rely on lever principles or elastic element deformation, such as indirectly reflecting the load size through spring compression, and then triggering the limit switch through mechanical linkage.
[0004] The main problem with existing technologies is that it is difficult to detect when the hook reaches its maximum load limit in a timely manner. Mechanical devices rely on manual observation of spring deformation or pointer scale, which can be easily overlooked in noisy construction sites. While electronic sensors can provide real-time data feedback, they are affected by electromagnetic interference, humid environments, or mechanical vibrations, resulting in signal delays or false alarms. Especially when the crane is in blind lifting mode, operators cannot visually judge the hook status, leading to a continuous accumulation of overload risk. If this problem is not solved, it can cause equipment damage at best, and trigger a chain of accidents such as wire rope breakage and cargo falling at worst, seriously threatening construction safety. Therefore, an anti-overload hook device for tower cranes is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides an anti-overload hook device for tower cranes, which aims to improve the problem that it is difficult to detect in time when the hook reaches its maximum load limit in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: an anti-overload hook device for tower cranes, comprising a hook, a sliding column 1 fixedly connected to the top of the hook, a sliding disc 1 fixedly connected to the top of the sliding column 1, a disc provided at the top of the hook, the bottom of the disc fitting against the top of the hook, a hollow column 1 fixedly connected to the top of the disc, a hollow column 2 fixedly connected to the outer wall of the hollow column 1, and a sliding component provided inside the hollow column 2;
[0007] The sliding assembly includes a retaining ball and a second sliding column. The retaining ball is slidably connected inside the second hollow column, and the second sliding column is slidably connected inside the second hollow column. A hollow block is fixedly connected to the outer wall of the second hollow column, and an indicator light is provided on the side wall of the hollow block. A first sliding disc is slidably connected to the inner wall of the first hollow column. A bearing assembly is provided inside the first hollow column, and an elastic assembly is sleeved on the outer wall of the second sliding column. A third hollow column is fixedly connected inside the hook, and a limit assembly is provided inside the third hollow column.
[0008] As a further description of the above technical solution:
[0009] The load-bearing component includes a hydraulic cylinder, the sliding column is slidably connected inside the hydraulic cylinder, and the hook is provided with an anti-detachment component.
[0010] As a further description of the above technical solution:
[0011] The elastic component includes a spring, one end of which is fixedly connected to the side wall of the ball, and the other end of which is fixedly connected to the inside of the hollow column.
[0012] As a further description of the above technical solution:
[0013] The anti-detachment component includes an anti-detachment hook and a retaining spring. The anti-detachment hook is rotatably connected inside the hook, and the retaining spring is disposed inside the anti-detachment hook.
[0014] As a further description of the above technical solution:
[0015] The limiting component includes a sliding column three and a sliding disk two. The sliding disk two is slidably connected inside the hollow column three, and the sliding column three is fixedly connected inside the sliding disk two. A ring is fixedly connected to one end of the sliding column three.
[0016] As a further description of the above technical solution:
[0017] Spring 2 is sleeved on the outer wall of the sliding column 3. One end of spring 2 is fixedly connected to the side wall of the sliding disk 2, and the other end of spring 2 is fixedly connected to the inner wall of the hollow column 3. A fixing frame is fixedly connected to the outer wall of the hollow column 3, and a support frame is fixedly connected to the top of the fixing frame.
[0018] As a further description of the above technical solution:
[0019] The support frame is slidably connected to a pull ring column, which engages with the sliding column in three phases. A limit plate is fixedly connected to the outer wall of the pull ring column.
[0020] As a further description of the above technical solution:
[0021] A spring is fitted on the outer wall of the pull ring column. One end of the spring is fixedly connected to the top of the limiting plate, and the other end of the spring is fixedly connected to the inside of the support frame.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, the sliding disc drives the sliding column to move inside the hydraulic cylinder. Then, the outer wall of the sliding disc squeezes the ball, causing the ball to slide inside the hollow column and drive the spring to slide into the hollow block. At the same time, it contacts the indicator light, thereby achieving the effect of prompting the hook to be overloaded. This solves the problem that it is difficult to detect the hook reaching its maximum load limit in time and improves the timeliness of the device.
[0024] 2. In this utility model, the locking state of the sliding column three is unlocked by pulling the pull ring column. Then, the spring two releases the elastic force, causing the sliding disc two to slide inside the hollow column three. At the same time, it causes one end of the sliding column three to slide to the outside of the hollow column three, so that one end of the sliding column three engages with the anti-detachment hook, thereby achieving the effect of locking and limiting the anti-detachment hook. This solves the problem of workers continuing to place goods on the hook when it is overloaded, and improves the safety of the device. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of an anti-overload hook device for a tower crane proposed in this utility model;
[0026] Figure 2 This is a cross-sectional structural diagram of a hollow column of a tower crane anti-overload hook device proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the support frame structure of an anti-overload hook device for a tower crane proposed in this utility model;
[0028] Figure 4This is a cross-sectional structural diagram of the fixing frame of the anti-overload hook device for a tower crane proposed in this utility model.
[0029] Legend:
[0030] 1. Lifting hook; 2. Disc; 3. Hollow column one; 4. Hollow column two; 5. Anti-disengagement hook; 6. Hollow column three; 7. Snap ring; 8. Sliding disc one; 9. Sliding column one; 10. Hydraulic cylinder; 11. Ball catcher; 12. Spring one; 13. Sliding column two; 14. Signal light; 15. Hollow block; 16. Fixing frame; 17. Support frame; 18. Pull ring column; 19. Ring; 20. Sliding column three; 21. Sliding disc two; 22. Spring two; 23. Spring three; 24. Limiting disc. Detailed Implementation
[0031] 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.
[0032] Reference Figure 1 and Figure 2 An embodiment of this utility model provides an overload protection hook device for a tower crane, comprising a hook 1, a sliding column 9 fixedly connected to the top of the hook 1, the sliding column 9 being used to transmit the suspended load and guide the vertical movement of a sliding disc 8, the sliding disc 8 being fixedly connected to the top of the sliding column 9, the sliding disc 8 being used to slide within a hollow column 3 and trigger a load-bearing component, a disc 2 being provided at the top of the hook 1, the disc 2 being used to connect the hook 1 and the hollow column 3 and distribute the force, the bottom of the disc 2 being in contact with the top of the hook 1, the top of the disc 2 being fixedly connected to a hollow column 3, the hollow column 3 being used to accommodate the sliding disc 8 and support the load-bearing component, a hollow column 4 being fixedly connected to the outer wall of the hollow column 3, the hollow column 4 being used to accommodate the sliding component and transmit an overload signal, and a sliding component being provided inside the hollow column 4;
[0033] The sliding assembly includes a retaining ball 11 and a sliding post 13. The retaining ball 11 is used to displace and trigger the indicator light 14 in case of overload. The sliding post 13 is used to push the retaining ball 11 and compress the elastic assembly. The retaining ball 11 is slidably connected inside the hollow post 14, and the sliding post 13 is also slidably connected inside the hollow post 14. A hollow block 15 is fixedly connected to the outer wall of the hollow post 14. The hollow block 15 is used to fix the indicator light 14 and provide installation space. The indicator light 14 is provided on the side wall of the hollow block 15. The indicator light 14 is used to trigger the indicator light 14 in case of overload. When a load is applied, a warning signal is issued. The sliding disc 8 is slidably connected to the inner wall of the hollow column 3. The inside of 3 is equipped with a load-bearing component, which is used to detect the load and drive the sliding component. The outer wall of the sliding column 13 is fitted with an elastic component, which is used to reset the sliding column 13 under normal load. The inside of the hook 1 is fixedly connected to a hollow column 6, which is used to accommodate the limiting component and enhance the structural strength. The inside of the hollow column 6 is equipped with a limiting component, which is used to prevent the hook 1 from accidentally disengaging.
[0034] Reference Figure 1 - Figure 4The load-bearing component includes a hydraulic cylinder 10, which detects the load and drives the sliding column 9 to move through hydraulic changes. The sliding column 9 is slidably connected inside the hydraulic cylinder 10 and slides within the hydraulic cylinder 10 to transmit load changes. An anti-detachment component is installed inside the hook 1 to prevent the suspended object from accidentally falling off. The elastic component includes a spring 12, which maintains the initial position of the retaining ball 11 under normal load. One end of the spring 12 is fixedly connected to the side wall of the retaining ball 11, and the other end is fixedly connected to the air... Inside the core column 2 4, the anti-detachment assembly includes an anti-detachment hook 5 and a retaining spring 7. The anti-detachment hook 5 is used to lock the suspended object, and the retaining spring 7 is used to provide the return spring force of the anti-detachment hook 5. The anti-detachment hook 5 is rotatably connected inside the hook 1. The retaining spring 7 is located inside the anti-detachment hook 5. The limiting assembly includes a sliding column 3 20 and a sliding disc 21. The sliding column 3 20 is used to control the opening and closing of the limiting mechanism. The sliding disc 21 is used to slide inside the hollow column 3 6 and compress the spring 22. The sliding disc 21 is slidably connected inside the hollow column 3 6, and the sliding column 3 20 is fixedly connected inside the sliding disc 21. A ring 19 is fixedly connected to one end of the sliding column 3 20. The ring 19 is used to limit the movement range of the sliding column 3 20. A spring 22 is sleeved on the outer wall of the sliding column 3 20. The spring 22 is used to reset the sliding disk 21 after the limit is released. One end of the spring 22 is fixedly connected to the side wall of the sliding disk 21, and the other end of the spring 22 is fixedly connected to the inner wall of the hollow column 3 6. A fixing frame 16 is fixedly connected to the outer wall of the hollow column 3 6. The fixing frame 16 is used to support the installation structure of the limit component. A support frame 17 is fixedly connected to the top of the fixing frame 16. The support frame 17 is used to guide... The guide ring post 18 slides, and the support frame 17 has a sliding connection to the pull ring post 18. The pull ring post 18 is used to manually control the locking and releasing of the limit component. The pull ring post 18 is engaged with the sliding post 20. The outer wall of the pull ring post 18 is fixedly connected to the limit plate 24. The limit plate 24 is used to limit the movement range of the pull ring post 18. The outer wall of the pull ring post 18 is fitted with a spring 23. The spring 23 is used to maintain the default locked position of the pull ring post 18. One end of the spring 23 is fixedly connected to the top of the limit plate 24, and the other end of the spring 23 is fixedly connected to the inside of the support frame 17.
[0035] Working principle: When using the overload protection hook device, when the cargo hook is on the hook 1, it will cause the hook 1 to move downwards. When the hook 1 moves downwards, it will cause the sliding disc 8 and the sliding column 9 to slide inside the hollow column 3. When the weight of the cargo exceeds the maximum load capacity of the hydraulic cylinder 10, the sliding column 9 inside the hydraulic cylinder 10 will cause the sliding disc 8 to slide downwards on the inner wall of the hollow column, causing the sliding disc 8 to contact the retaining ball 11. When the sliding disc 8 squeezes the retaining ball 11, it will cause the sliding column 13 to slide inside the hollow column 4. Through the sliding column 13, it slides into the hollow block 15. The contact between the moving column 2 13 and the signal light 14 causes the signal light 14 to illuminate, thus providing a timely warning when the hook is overloaded. When the hook reaches its maximum load limit, pulling the pull ring column 18 unlocks the lock between the pull ring column 18 and the sliding column 3 20. Subsequently, the compressed spring 2 22 releases its elasticity, causing the sliding disc 2 21 to slide inside the hollow column 3 6. At the same time, it causes the sliding column 3 20 to slide out from inside the hollow column 3 6, so that one end of the sliding column 3 20 engages with the anti-disengagement hook 5 to limit the movement, preventing workers from continuing to lift goods onto the hook, thereby preventing hook overload.
[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An overload protection hook device for a tower crane, comprising a hook (1), characterized in that: The top of the hook (1) is fixedly connected to a sliding column (9), the top of the sliding column (9) is fixedly connected to a sliding disc (8), the top of the hook (1) is provided with a disc (2), the bottom of the disc (2) is in contact with the top of the hook (1), the top of the disc (2) is fixedly connected to a hollow column (3), the outer wall of the hollow column (3) is fixedly connected to a hollow column (4), and the hollow column (4) is provided with a sliding component inside. The sliding assembly includes a ball (11) and a second sliding column (13). The ball (11) is slidably connected inside the second hollow column (4). The second sliding column (13) is slidably connected inside the second hollow column (4). A hollow block (15) is fixedly connected to the outer wall of the second hollow column (4). A signal light (14) is provided on the side wall of the hollow block (15). The first sliding disk (8) is slidably connected to the inner wall of the first hollow column (3). A bearing assembly is provided inside the first hollow column (3). An elastic assembly is sleeved on the outer wall of the second sliding column (13). A third hollow column (6) is fixedly connected inside the hook (1). A limit assembly is provided inside the third hollow column (6).
2. The anti-overload hook device for tower cranes according to claim 1, characterized in that: The load-bearing component includes a hydraulic cylinder (10), the sliding column (9) is slidably connected inside the hydraulic cylinder (10), and the hook (1) is provided with an anti-detachment component.
3. The anti-overload hook device for tower cranes according to claim 1, characterized in that: The elastic component includes a spring (12), one end of which is fixedly connected to the side wall of the ball (11), and the other end of which is fixedly connected to the inside of the hollow column (4).
4. The anti-overload hook device for a tower crane according to claim 2, characterized in that: The anti-detachment component includes an anti-detachment hook (5) and a retaining ring (7). The anti-detachment hook (5) is rotatably connected inside the hook (1), and the retaining ring (7) is disposed inside the anti-detachment hook (5).
5. The anti-overload hook device for a tower crane according to claim 1, characterized in that: The limiting component includes a sliding column three (20) and a sliding disk two (21). The sliding disk two (21) is slidably connected inside the hollow column three (6). The sliding column three (20) is fixedly connected inside the sliding disk two (21). A ring (19) is fixedly connected to one end of the sliding column three (20).
6. The anti-overload hook device for a tower crane according to claim 5, characterized in that: Spring 2 (22) is sleeved on the outer wall of the sliding column 3 (20). One end of spring 2 (22) is fixedly connected to the side wall of the sliding disk 2 (21), and the other end of spring 2 (22) is fixedly connected to the inner wall of the hollow column 3 (6). A fixed frame (16) is fixedly connected to the outer wall of the hollow column 3 (6), and a support frame (17) is fixedly connected to the top of the fixed frame (16).
7. The anti-overload hook device for a tower crane according to claim 6, characterized in that: The support frame (17) is slidably connected to a pull ring post (18), which engages with the sliding post (20), and a limit plate (24) is fixedly connected to the outer wall of the pull ring post (18).
8. The anti-overload hook device for a tower crane according to claim 7, characterized in that: The outer wall of the pull ring post (18) is fitted with a spring three (23), one end of the spring three (23) is fixedly connected to the top of the limiting plate (24), and the other end of the spring three (23) is fixedly connected to the inside of the support frame (17).