Safety hook of crane
Through innovative design of the limiting and disassembly components, the problem of easy displacement or wear of traditional crane safety hooks under impact and vibration has been solved, achieving higher safety and stability, and simplifying the maintenance process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU JIANGZHI AUTOMATION TECH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional crane safety hooks are prone to displacement or wear under frequent impacts and vibrations, causing hoisted items to slip out, posing a safety hazard and having a short service life.
The design incorporates a limit component and a disassembly component. The limit component, through the cooperation of the limit housing and the spring, ensures reliable locking of the hook. The disassembly component, through the cooperation of the knob and the locking block, enables convenient disassembly and maintenance, avoiding the wear and displacement problems of traditional safety cards.
It improves the safety and stability of lifting operations, extends the service life of hooks, simplifies the maintenance process, and reduces maintenance costs.
Smart Images
Figure CN224132541U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane hook technology, and in particular to a crane safety hook. Background Technology
[0002] In modern industrial production and engineering construction, cranes, as indispensable heavy machinery, are widely used in port loading and unloading, construction, and cargo lifting. Their safety hooks, as key components directly supporting the lifted goods, are directly related to the safety and reliability of the entire operation. A malfunction in the safety hook can cause the lifted goods to fall, leading to a major safety accident and resulting in serious casualties and property damage. Therefore, developing efficient, stable, and safe crane safety hook technology has always been an important research direction in the field of mechanical engineering.
[0003] Currently, traditional crane safety hooks mostly employ a spring-loaded safety catch structure. This structure mainly consists of the hook body, a spring, and a safety catch. Its technical principle is that the spring's elastic force tightly secures the safety catch against the hook opening, forming a protective barrier to prevent the hoisted item from accidentally slipping out. During hoisting operations, the operator manually opens the safety catch to hook in the item, and then the safety catch automatically resets due to the spring's tension, blocking the hook opening. This structure utilizes the restoring force generated by the spring's elastic deformation to achieve closure of the hook opening, making operation relatively simple and ensuring a certain level of safety during hoisting operations.
[0004] However, this traditional spring safety catch structure has significant drawbacks. During actual lifting operations, cranes inevitably experience various impacts and vibrations, such as the inertial impact of sudden stops and starts, or collisions caused by the swaying of the lifted goods. Since the spring safety catch relies solely on spring force to maintain its closed state, the spring is prone to fatigue deformation under frequent impacts and vibrations, and the safety catch may also shift. Once the safety catch shifts, the hook opening loses its protection, allowing the lifted goods to slip out and causing a safety accident. Simultaneously, frequent friction between the safety catch and the hook leads to rapid wear of components, reducing service life, increasing maintenance costs, and decreasing the protective performance of the worn safety catch, making it difficult to guarantee the safety and stability of lifting operations. Therefore, a crane safety hook is proposed to address these problems. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides a crane safety hook, which aims to improve the problem that the safety card is easily displaced or worn due to impact, vibration or other factors in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A crane safety hook includes a hook, a threaded post fixedly connected to the top of the hook, and a limit component provided on the outer wall of the hook;
[0008] The limiting component includes a limiting post, the outer wall of which is disposed on the outer wall of the hook. A fixing post is disposed on the outer wall of the hook. A connecting post is fixedly connected to the top of the fixing post. A disassembly and assembly component is disposed inside the connecting post. The limiting post is rotatably connected to the outer wall of the fixing post. A limiting shell is slidably connected to the outer wall of the fixing post. A spring is sleeved on the outer wall of the fixing post. The top of the spring is fixedly connected to the bottom of the connecting post. The bottom of the spring is fixedly connected to the top of the limiting shell.
[0009] As a further description of the above technical solution:
[0010] The assembly / disassembly assembly includes a locking block and a slot formed inside the connecting post, with the outer wall of the locking block slidably connected to the slot.
[0011] As a further description of the above technical solution:
[0012] A fixing block is fixedly connected to the outer wall of the hook, and a fixing shell is fixedly connected to the outer wall of the fixing block. The outer wall of the fixing shell is slidably connected inside the connecting column.
[0013] As a further description of the above technical solution:
[0014] A rotating column is rotatably connected inside the fixed outer shell, and a knob is fixedly connected to the top of the rotating column.
[0015] As a further description of the above technical solution:
[0016] A turntable is fixedly connected to the bottom of the rotating column, and a limit groove is formed inside the turntable.
[0017] As a further description of the above technical solution:
[0018] A sliding column is fixedly connected to the top of the card block, and the outer wall of the sliding column is slidably connected inside the limiting groove.
[0019] As a further description of the above technical solution:
[0020] A limiting plate is fixedly connected to one side of the card block, and the outer wall of the limiting plate is slidably connected inside the fixed outer shell.
[0021] As a further description of the above technical solution:
[0022] A second spring is provided inside the fixed outer shell, and both ends of the second spring are fixedly connected to the outer wall of the limiting plate.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, the limiting column achieves its rotation function by pushing the limiting shell. When the limiting shell is pushed, the limiting column rotates on the outer wall of the fixed column through the drive of the limiting shell and in conjunction with the spring, thereby conveniently locking the hook hole and preventing the hanging object from falling. This solves the problem that traditional safety cards are prone to displacement or wear due to impact and vibration, and improves the safety and stability of lifting operations.
[0025] 2. In this utility model, the card block achieves its movement function by rotating the knob. When the knob is rotated, the knob drives the turntable and the slide column, and in conjunction with the spring, the card plate slides inside the slot, thereby facilitating the disassembly and assembly of the limiting device. This makes it convenient for maintenance, replacement and movement, and solves the problem that multiple tools are required for disassembly and assembly in existing devices, which makes disassembly inconvenient. This improves the convenience of disassembly and assembly of the limiting device. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of a crane safety hook proposed in this utility model;
[0027] Figure 2 This is a schematic diagram of the structure of a limiting column for a crane safety hook proposed in this utility model;
[0028] Figure 3 This is a schematic diagram of the internal structure of the limiting shell of a crane safety hook according to the present invention;
[0029] Figure 4 This is a schematic diagram of the internal structure of the connecting column of a crane safety hook proposed in this utility model;
[0030] Figure 5 This is a schematic diagram of the internal structure of the fixing shell of a crane safety hook according to the present invention;
[0031] Figure 6 This is a schematic diagram of the sliding column of a crane safety hook proposed in this utility model.
[0032] Legend:
[0033] 1. Hook; 2. Limiting post; 3. Limiting housing; 4. Threaded post; 5. Spring 1; 6. Fixing post; 7. Connecting post; 8. Fixing block; 9. Locking block; 10. Locking groove; 11. Fixing housing; 12. Knob; 13. Rotating post; 14. Turntable; 15. Limiting plate; 16. Limiting groove; 17. Sliding post; 18. Spring 2. 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] Reference Figures 1-3 The present invention provides an embodiment of a crane safety hook, including a hook 1, a threaded post 4 fixedly connected to the top of the hook 1, the threaded post 4 being a cylindrical structure with standard threads machined on its surface, used for threaded connection with the crane's lifting arm or other connecting parts to ensure that the hook 1 is securely installed to withstand the huge pulling force during the lifting process, and a limit component is provided on the outer wall of the hook 1.
[0036] The limiting component includes a limiting post 2, which is cylindrical in shape and has its outer wall fitted against the outer wall of the hook 1. It is primarily used to prevent the hung object from sliding out of the hook 1 opening, thus preventing accidental falls and potential safety hazards. The outer wall of the limiting post 2 is set against the outer wall of the hook 1. A fixing post 6 is provided on the outer wall of the hook 1, and a connecting post 7 is fixedly connected to the top of the fixing post 6. The connecting post 7 is rotatably connected to the outer wall of the fixing post 6 via a bearing, allowing the limiting post 2 to rotate flexibly around the fixing post 6, thereby enabling the opening and closing of the hook 1 opening. A disassembly assembly is provided inside the connecting post 7. The limiting post 2 is rotatably connected to the outer wall of the fixing post 6. A limiting housing 3 is slidably connected to the outer wall of the fixing post 6. The limiting housing 3 has a cylindrical structure, and its inner wall is clearance-fitted with the outer wall of the fixing post 6 to ensure smooth sliding. A spring 5 is sleeved on the outer wall of the fixing post 6. The top of the spring 5 is fixedly connected to the bottom of the connecting post 7, and the bottom of the spring 5 is fixedly connected to the top of the limiting housing 3.
[0037] Specifically, when hanging an object, the operator only needs to push the limiting shell 3. The limiting shell 3 and the fixed column 6 adopt a precise sliding fit structure. Under the action of the thrust, the limiting shell 3 can slide smoothly along the outer wall of the fixed column 6. During the sliding process, the limiting shell 3 squeezes the spring 5, causing it to undergo elastic deformation and be compressed. When the spring 5 is compressed, the original limiting constraint on the limiting column 2 is released. At this time, the limiting column 2 gains rotational freedom and can rotate flexibly around the outer wall of the fixed column 6, accurately placing the object on the top of the hook 1. After the hanging is completed, the operator releases the limiting shell 3, and the compressed spring 5 immediately takes effect. Relying on its own strong rebound force, it pushes the limiting shell 3 to reset, re-limiting and fixing the limiting column 2, restoring it to a vertical state, and tightly sealing the opening of the hook 1, thereby effectively preventing the object from accidentally slipping out and providing reliable safety for hoisting operations.
[0038] Reference Figures 3-6 The assembly includes a locking block 9 and a slot 10 inside the connecting column 7. The outer wall of the locking block 9 is slidably connected to the inside of the slot 10. The locking block 9 is a rectangular block structure made of 45# steel that has been quenched, possessing high strength and wear resistance. Its outer wall is in clearance fit with the inner wall of the slot 10, allowing it to slide flexibly within the slot 10. This is used to lock and fix the connecting column 7 to other components, preventing loose connections from affecting the normal use of the crane's safety hook 1. A fixing block 8 is fixedly connected to the outer wall of the hook 1. A fixing shell 11 is fixedly connected to the outer wall of the fixing block 8. The outer wall of the fixing shell 11 is slidably connected to the inside of the connecting column 7. An internal rotating column 13 is connected to the rotating column 13. A knob 12 is fixedly connected to the top of the rotating column 13. The knob 12 is a disc-shaped structure with anti-slip texture on the surface, which is convenient for the operator to manually apply force to rotate. A turntable 14 is fixedly connected to the bottom of the rotating column 13. A limit groove 16 is opened inside the turntable 14. A sliding column 17 is fixedly connected to the top of the locking block 9. The outer wall of the sliding column 17 is slidably connected to the inside of the limit groove 16. A limit plate 15 is fixedly connected to one side of the locking block 9. The outer wall of the limit plate 15 is slidably connected to the inside of the fixed housing 11. A second spring 18 is set inside the fixed housing 11. Both ends of the second spring 18 are fixedly connected to the outer wall of the limit plate 15.
[0039] Specifically, when the crane safety hook 1 has been used for an extended period and its components show wear or malfunction requiring maintenance, the operator simply needs to turn the knob 12. The knob 12 will then drive the rotating column 13, which is coaxially fixed to it, to rotate synchronously. The rotation of the rotating column 13 further drives the turntable 14 to rotate, causing the limiting groove 16 on the turntable 14 to change position. The rotation of the limiting groove 16 drives the internal sliding column 17 to move along a specific trajectory. The sliding column 17 is connected to the limiting plate 15, thus pushing the limiting plate 15 to move. During this process, the limiting plate 15 compresses the second spring 18. As the second spring 18 is compressed, the locking block 9 gradually slides out from inside the slot 10. At this point, the connecting column 7 loses its locking constraint, and the operator can easily remove it for inspection or replacement. After maintenance, the connecting column 7 is reset, the knob 12 is released, and the second spring 18, with its own rebound force, drives the locking block 9 to re-engage precisely inside the slot 10, achieving a stable fixation. The entire process requires no additional tools, greatly improving maintenance efficiency.
[0040] Working principle: When hanging an object, push the limiting shell 3. The limiting shell 3 slides on the outer wall of the fixing post 6 to compress the spring 5, thereby releasing the limitation on the limiting post 2 and allowing it to rotate on the outer wall of the fixing post 6. Only then can the object be hung on the top of the hook 1. After that, release the limiting shell 3. The spring 5 rebounds and limits the limiting post 2, making it vertical and closing the opening of the hook 1.
[0041] Additionally, when the usage time is too long, the knob 12 can be rotated, which will drive the rotating column 13 to rotate, and then drive the turntable 14 to rotate, thereby driving the internal limiting groove 16 to rotate, which will drive the internal sliding column 17 to move, and drive the limiting plate 15 to move, compressing the second spring 18, and sliding the locking block 9 out of the slot 10, so that the connecting column 7 can be removed for maintenance, and then put back, and the knob 12 can be released. The second spring 18 will rebound and drive the locking block 9 to re-lock inside the slot 10 for fixation.
[0042] 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. A crane safety hook comprising a hook (1), characterized in that: The top of the hook (1) is fixedly connected to a threaded post (4), and the outer wall of the hook (1) is provided with a limit component; The limiting component includes a limiting post (2), the outer wall of the limiting post (2) is disposed on the outer wall of the hook (1), the outer wall of the hook (1) is provided with a fixing post (6), the top of the fixing post (6) is fixedly connected to a connecting post (7), the connecting post (7) is provided with a disassembly and assembly component, the limiting post (2) is rotatably connected to the outer wall of the fixing post (6), the outer wall of the fixing post (6) is slidably connected to a limiting shell (3), the outer wall of the fixing post (6) is sleeved with a spring (5), the top of the spring (5) is fixedly connected to the bottom of the connecting post (7), and the bottom of the spring (5) is fixedly connected to the top of the limiting shell (3).
2. A safety hook for a crane according to claim 1, characterised in that: The assembly and disassembly assembly includes a locking block (9) and a slot (10) formed inside the connecting post (7), with the outer wall of the locking block (9) slidably connected inside the slot (10).
3. A safety hook for a crane as claimed in claim 2, characterised in that: The hook (1) is fixedly connected to a fixing block (8) on its outer wall, and the fixing block (8) is fixedly connected to a fixing shell (11) on its outer wall. The fixing shell (11) is slidably connected to the inside of the connecting column (7).
4. A safety hook for a crane according to claim 3, characterised in that: The fixed outer shell (11) is rotatably connected to a rotating column (13), and a knob (12) is fixedly connected to the top of the rotating column (13).
5. A crane safety hook according to claim 4, characterized in that: The bottom of the rotating column (13) is fixedly connected to a turntable (14), and a limit groove (16) is opened inside the turntable (14).
6. A safety hook for a crane as claimed in claim 5, characterised in that: The top of the card block (9) is fixedly connected to a sliding column (17), and the outer wall of the sliding column (17) is slidably connected inside the limiting groove (16).
7. A safety hook for a crane according to claim 6, characterised in that: The card block (9) is fixedly connected to a limiting plate (15) on one side, and the outer wall of the limiting plate (15) is slidably connected to the inside of the fixed outer shell (11).
8. A safety hook for a crane according to claim 7, characterised in that: The fixed outer shell (11) is provided with a second spring (18), and both ends of the second spring (18) are fixedly connected to the outer wall of the limiting plate (15).