Self-locking anti-falling hook of crane
By employing a worm gear transmission mechanism on the crane hook to achieve self-locking and anti-detachment, the safety hazard of the lifting rope coming off under high-frequency vibration is solved, ensuring that the lifting rope is always confined within the hook, thereby improving the safety and operational accuracy of the crane.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN DONGQI MACHINERY
- Filing Date
- 2025-07-07
- Publication Date
- 2026-07-07
AI Technical Summary
Existing anti-detachment devices for crane hooks are prone to spring fatigue failure under high-frequency vibration conditions, which increases the risk of the lifting rope coming off and poses a safety hazard.
The system employs a symmetrical worm gear transmission mechanism to achieve self-locking and unlocking of the hook through mechanical transmission, ensuring that the limit plate and the hook remain locked and preventing the lifting rope from slipping out.
It effectively prevents the lifting rope from slipping out of the hook, improving the practicality and safety of the crane's self-locking anti-slip hook. The operation process requires no additional energy, and the positioning accuracy can reach the millimeter level.
Smart Images
Figure CN224467368U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hook technology, specifically a self-locking anti-detachment hook for cranes. Background Technology
[0002] In the field of lifting machinery, the hook is the core component that carries heavy objects, and its anti-derailment performance is directly related to the safety and efficiency of operation. However, the existing anti-derailment devices for crane hooks generally adopt spring pin type or manual baffle type structures.
[0003] Traditional anti-derailment devices mostly rely on spring force or manual locking. When the crane is in a high-frequency vibration condition (such as construction or port loading and unloading), the spring is prone to fatigue failure, causing the anti-derailment pin to loosen and fall off. This significantly increases the risk of the lifting rope coming off the hook. Once the lifting rope comes off, the heavy object will fall, generating a huge impact force in an instant. This can easily damage surrounding equipment and building facilities, seriously threatening the lives of on-site workers and causing irreparable personal injury accidents. Therefore, a self-locking anti-derailment hook for cranes is needed. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a self-locking anti-detachment hook for cranes. It solves the problem that traditional anti-detachment devices rely on spring force or manual locking. When the crane is under high-frequency vibration conditions (such as construction or port loading and unloading), the spring is prone to fatigue failure, which can cause the anti-detachment pin to loosen and fall off, significantly increasing the risk of the lifting rope coming off the hook.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a crane self-locking anti-detachment hook, including a hook mounting frame, on which a hook is fixedly mounted, and a self-locking anti-detachment component, which is disposed on the hook mounting frame. The self-locking anti-detachment component includes two L-shaped fixing plates, which are respectively fixedly connected to the front and rear surfaces of the hook mounting frame. A protective box is fixedly connected to the lower surface of each of the two L-shaped fixing plates. A connecting shaft is fixedly connected to the right inner wall of the protective box, and a first worm gear is fixedly connected to the left side of the connecting shaft. The first worm gear is rotatably connected to the inner wall of the protective box.
[0008] Preferably, a second turbine is fixedly sleeved on the outer wall of the connecting shaft, and a second worm is provided on the upper surface of the second turbine, with the second worm and the second turbine meshing together.
[0009] Preferably, a first turbine is provided on the upper surface of the first worm, the first turbine meshes with the first worm, and a transmission rod is fixedly sleeved on the inner wall of the first turbine.
[0010] Preferably, the transmission rod is rotatably connected to the protective box, and the rear end of the transmission rod rotatably extends through the rear surface of the protective box. The structures on the two protective boxes are arranged in a front-to-back mirror configuration.
[0011] Preferably, a connecting rod is provided on the right side of the hook, and the front and rear ends of the connecting rod respectively rotatably penetrate into the interior of the corresponding protective box and are fixedly connected to the corresponding second worm gear.
[0012] Preferably, a limiting plate is provided on the left side of the hook, the limiting plate is fixedly connected to two transmission rods, a first slot is provided on the right side of the limiting plate, and a second slot is provided on the left side of the limiting plate.
[0013] Preferably, a rotating wheel is provided on the front surface of the protective box located on the front side. The rear end of the rotating wheel rotates through the interior of the corresponding protective box and is fixedly connected to the front end of the second worm gear.
[0014] (III) Beneficial Effects
[0015] Compared with the prior art, this utility model provides a self-locking anti-detachment hook for cranes, which has the following beneficial effects:
[0016] 1. The crane's self-locking anti-derailment hook uses a symmetrical worm gear transmission mechanism to ensure that the limit plate rotates synchronously on both sides, avoiding tilting and jamming caused by uneven force on one side. This symmetrical design can control the transmission error on the left and right sides within ±0.5°, ensuring that the limit plate always remains locked to the hook, effectively preventing the lifting rope from coming off the hook and improving the practicality of the crane's self-locking anti-derailment hook.
[0017] 2. The crane features a self-locking anti-detachment hook. When the lifting rope needs to be removed, the wheel is rotated counterclockwise, the limit plate rotates forward to reset, and the first and second locking slots disengage from the hook surface. At this time, the lifting rope can be freely removed. The entire operation process achieves self-locking and unlocking through mechanical transmission, requiring no additional energy. Moreover, the positioning accuracy can reach the millimeter level, meeting the safety requirements of lifting operations. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the self-locking anti-detachment hook for cranes according to this utility model;
[0019] Figure 2 This is a schematic diagram of the entire utility model from the right side.
[0020] Figure 3 This is a schematic diagram of the interior of the protective box of this utility model;
[0021] Figure 4 This is a schematic diagram of the position of the second slot in this utility model.
[0022] In the diagram: 1. Hook mounting bracket; 2. L-shaped fixing plate; 3. Rotary wheel; 4. Protective box; 5. Hook; 6. Limiting plate; 7. Connecting rod; 8. First slot; 9. Transmission rod; 10. First turbine; 11. First worm gear; 12. Connecting shaft; 13. Second slot; 14. Second worm gear; 15. Second turbine. Detailed Implementation
[0023] 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.
[0024] Please see Figure 1-4 This utility model provides a new technical solution: a crane self-locking anti-detachment hook, including a hook mounting frame 1, on which a hook 5 is fixedly mounted, and a self-locking anti-detachment component. The self-locking anti-detachment component is disposed on the hook mounting frame 1 and includes two L-shaped fixing plates 2, which are respectively fixedly connected to the front and rear surfaces of the hook mounting frame 1. A protective box 4 is fixedly connected to the lower surface of each of the two L-shaped fixing plates 2. A connecting shaft 12 is fixedly connected to the right inner wall of the protective box 4, and a first worm gear 11 is fixedly connected to the left side of the connecting shaft 12. The first worm gear 11 is rotatably connected to the inner wall of the protective box 4.
[0025] Furthermore, a second turbine 15 is fixedly sleeved on the outer wall of the connecting shaft 12, and a second worm 14 is provided on the upper surface of the second turbine 15. The second worm 14 and the second turbine 15 mesh together.
[0026] Furthermore, a first turbine 10 is provided on the upper surface of the first worm 11, and the first turbine 10 meshes with the first worm 11. A transmission rod 9 is fixedly sleeved on the inner wall of the first turbine 10.
[0027] Furthermore, the transmission rod 9 is rotatably connected to the protective box 4, and the rear end of the transmission rod 9 rotates through the rear surface of the protective box 4. The structures on the two protective boxes 4 are set in a front-to-back mirror configuration.
[0028] Furthermore, a connecting rod 7 is provided on the right side of the hook 5. The front and rear ends of the connecting rod 7 are respectively rotated and penetrated into the interior of the corresponding protective box 4, and are fixedly connected to the corresponding second worm gear 14.
[0029] Furthermore, a limiting plate 6 is provided on the left side of the hook 5. The limiting plate 6 is fixedly connected to two transmission rods 9. A first slot 8 is provided on the right side of the limiting plate 6, and a second slot 13 is provided on the left side of the limiting plate 6.
[0030] Furthermore, a rotating wheel 3 is provided on the front surface of the front protective box 4. The rear end of the rotating wheel 3 rotates through into the interior of the corresponding protective box 4 and is fixedly connected to the front end of the second worm gear 14.
[0031] Furthermore, when using the self-locking anti-detachment hook of this crane, the worker first places the lifting rope inside the hook 5, and then passes it through the pulley 3;
[0032] When the staff rotates the wheel 3 clockwise, the wheel 3 drives the second worm gear 14 in the front protective box 4 to rotate synchronously. Since the front and rear protective boxes 4 are mirror images, the rotation of the front second worm gear 14 will drive the rear second worm gear 14 to rotate in the same direction through the connecting rod 7.
[0033] The second worm 14 meshes with the second turbine 15, driving the connecting shaft 12 to rotate. The first worm 11 on the connecting shaft 12 rotates accordingly. The first worm 11 drives the first turbine 10 to rotate. The first turbine 10 drives the limiting plate 6 to rotate backward through the transmission rod 9. At this time, the second slot 13 on the left side of the limiting plate 6 gradually approaches the left hook body of the hook 5.
[0034] When the limiting plate 6 is rotated to the horizontal position, the second slot 13 is just engaged with the edge of the hook opening of the hook 5, and at the same time, the first slot 8 on the right side of the limiting plate 6 fits with the outer contour of the hook 5 to form a limiting structure.
[0035] Among them, since the worm gear transmission has a self-locking characteristic, when the wheel 3 stops rotating, the second worm 14 cannot drive the second turbine 15 in the reverse direction, so that the limiting plate 6 is kept in the locked position. Even if the rope is violently shaken, the limiting plate 6 will not rotate due to the force, ensuring that the rope is always restricted in the closed space between the hook 5 and the limiting plate 6.
[0036] Among them, the protective box 4 forms a closed protection for the internal transmission components, preventing dust and rainwater from entering and causing the worm gear meshing failure. At the same time, the L-shaped fixing plate 2 securely installs the protective box 4 on the hook mounting bracket 1, enhancing the vibration resistance of the entire self-locking structure.
[0037] When the lifting rope needs to be removed, the wheel 3 is rotated counterclockwise, the limit plate 6 rotates forward to reset, the first slot 8 and the second slot 13 disengage from the surface of the hook 5, and the lifting rope can be taken out freely. The entire operation process achieves self-locking and unlocking through mechanical transmission, without the need for additional energy, and the positioning accuracy can reach the millimeter level, meeting the safety requirements of lifting operations.
[0038] The symmetrical worm gear transmission mechanism ensures that the two sides of the limit plate 6 rotate synchronously, avoiding tilting and jamming caused by uneven force on one side. This symmetrical design can control the transmission error on the left and right sides within ±0.5°, ensuring that the limit plate 6 always remains locked to the hook 5, effectively preventing the lifting rope from coming off the hook and improving the practicality of the crane's self-locking anti-derailment hook.
[0039] Structural Description:
[0040] Hook mounting bracket 1: The basic load-bearing component of the crane hook, used to fix the hook 5 and the self-locking anti-detachment component, providing installation support for the entire hook device, ensuring that it is firmly connected to the crane, and bearing the tension and stress during lifting operations.
[0041] L-shaped fixing plate 2: It is fixed on the front and rear surfaces of the hook mounting frame 1 respectively, and has an L-shaped structure. It is used to install the protective box 4. Through its own shape and fixing method, it can firmly connect the protective box 4 to the hook mounting frame 1, thereby enhancing the overall stability of the self-locking anti-detachment component.
[0042] Rotating wheel 3: An operating component installed on the front surface of the front protective box 4. Its rear end extends into the interior of the protective box 4 and is fixedly connected to the second worm gear 14. The operator can manually rotate the rotating wheel 3 to drive the transmission mechanism of the entire self-locking anti-detachment assembly, thereby realizing the rotation and locking operation of the limit plate 6.
[0043] Protective box 4: Fixed to the hook mounting bracket 1 by L-shaped fixing plate 2, the protective box 4 houses the connecting shaft 12, the first worm gear 11 and other transmission components. The protective box 4 provides sealed protection for the internal transmission components, preventing the intrusion of external debris such as dust and rainwater, avoiding worm gear meshing failure, and ensuring the normal operation of the self-locking anti-detachment component.
[0044] Hook 5: A key component used for suspending the lifting rope and lifting heavy objects, it is fixedly installed on the hook mounting bracket 1. Hook 5 cooperates with the limiting plate 6 to form a closed space under the action of the self-locking anti-derailment component, ensuring that the lifting rope will not come out of the hook opening and ensuring the safety of lifting operations.
[0045] Limiting plate 6: Located on the left side of hook 5, it is fixedly connected to the two transmission rods 9 and serves to prevent the lifting rope from coming off the hook opening of hook 5. The limiting plate 6 has a first slot 8 on the right side and a second slot 13 on the left side. When rotated to the horizontal position, the two slots respectively fit against the edge of the hook opening and the outer contour of hook 5, restricting the movement of the lifting rope.
[0046] Connecting rod 7: Located on the right side of hook 5, with its front and rear ends extending into the corresponding protective boxes 4 and fixedly connected to the second worm gear 14. Connecting rod 7 is used to transmit the rotation of the second worm gear 14 inside the front and rear protective boxes 4, ensuring synchronous operation of the front and rear structures, and enabling the limit plate 6 to rotate synchronously on both sides, avoiding tilting and jamming.
[0047] First slot 8: It is located on the right side of the limiting plate 6. When the limiting plate 6 is rotated to the horizontal locking position, the first slot 8 fits against the outer contour of the hook 5, which limits the limiting plate 6 and also helps to limit the position of the lifting rope to prevent it from coming off the side of the hook 5.
[0048] Transmission rod 9: Rotatably connected to the protective box 4, with the first turbine 10 fixedly sleeved on the inner wall, and its rear end extending out of the rear surface of the protective box 4 and fixed to the limiting plate 6. Transmission rod 9 transmits the rotational motion of the first turbine 10 to the limiting plate 6, causing the limiting plate 6 to rotate, thereby closing and opening the hook opening of the hook 5.
[0049] The first turbine 10 meshes with the first worm gear 11, and its inner wall is fixedly sleeved on the transmission rod 9. The first turbine 10 rotates under the drive of the first worm gear 11, and drives the limiting plate 6 to rotate through the transmission rod 9. It is one of the key transmission components for realizing the rotation of the limiting plate 6.
[0050] The first worm gear 11 is fixed to the left side of the connecting shaft 12 and is rotatably connected to the inner wall of the protective box 4. Its upper surface meshes with the first turbine 10. The first worm gear 11 rotates under the drive of the connecting shaft 12, driving the first turbine 10 to rotate, thereby realizing the rotation operation of the limiting plate 6.
[0051] Connecting shaft 12: Fixed to the inner right wall of the protective box 4, connected to the first worm gear 11 on the left side, and the second turbine gear 15 is fixedly sleeved on the outer wall. The connecting shaft 12 is used to transmit the rotational motion of the second turbine gear 15, driving the first worm gear 11 to rotate, and plays a connecting and transmission role in the entire transmission process.
[0052] The second slot 13 is located on the left side of the limiting plate 6. When the limiting plate 6 is rotated to the horizontal position, the second slot 13 is precisely engaged with the edge of the hook opening of the hook 5, forming a solid limiting structure to prevent the lifting rope from coming out of the hook opening of the hook 5.
[0053] The second worm gear 14 is disposed on the upper surface of the second turbine 15 and meshes with the second turbine 15. Its front and rear ends are fixedly connected to the connecting rod 7 and the rotating wheel 3, respectively. The second worm gear 14 rotates under the drive of the rotating wheel 3. Through meshing with the second turbine 15, it drives the connecting shaft 12 to rotate, thereby realizing the operation of the entire self-locking anti-detachment assembly.
[0054] The second turbine 15 is fixedly sleeved on the outer wall of the connecting shaft 12, and its upper surface meshes with the second worm gear 14. Driven by the second worm gear 14, the second turbine 15 drives the connecting shaft 12 to rotate, thereby driving the first worm gear 11 and the first turbine 10 to achieve the rotation and locking of the limiting plate 6.
[0055] 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 self-locking, anti-detachment type crane hook, characterized in that, include: A hook mounting bracket (1) is fixedly mounted on the hook mounting bracket (1). A self-locking anti-detachment component is set on the hook mounting bracket (1). The self-locking anti-detachment component includes two L-shaped fixing plates (2). The two L-shaped fixing plates (2) are fixedly connected to the front and rear surfaces of the hook mounting bracket (1) respectively. A protective box (4) is fixedly connected to the lower surface of the two L-shaped fixing plates (2). A connecting shaft (12) is fixedly connected to the right inner wall of the protective box (4). A first worm gear (11) is fixedly connected to the left side of the connecting shaft (12). The first worm gear (11) is rotatably connected to the inner wall of the protective box (4).
2. The crane self-locking anti-detachment hook according to claim 1, characterized in that: The outer wall of the connecting shaft (12) is fixedly sleeved with a second turbine (15), and a second worm (14) is provided on the upper surface of the second turbine (15). The second worm (14) and the second turbine (15) mesh together.
3. A crane self-locking anti-detachment hook according to claim 1, characterized in that: The upper surface of the first worm (11) is provided with a first turbine (10), which meshes with the first worm (11). A transmission rod (9) is fixedly sleeved on the inner wall of the first turbine (10).
4. A crane self-locking anti-detachment hook according to claim 3, characterized in that: The transmission rod (9) is rotatably connected to the protective box (4), and the rear end of the transmission rod (9) rotates through the rear surface of the protective box (4). The structures on the two protective boxes (4) are set in a mirror image.
5. A crane self-locking anti-detachment hook according to claim 1, characterized in that: A connecting rod (7) is provided on the right side of the hook (5). The front and rear ends of the connecting rod (7) are respectively rotated and penetrated into the interior of the corresponding protective box (4), and are fixedly connected to the corresponding second worm gear (14).
6. A crane self-locking anti-detachment hook according to claim 1, characterized in that: A limiting plate (6) is provided on the left side of the hook (5). The limiting plate (6) is fixedly connected to two transmission rods (9). A first slot (8) is provided on the right side of the limiting plate (6), and a second slot (13) is provided on the left side of the limiting plate (6).
7. A crane self-locking anti-detachment hook according to claim 1, characterized in that: A rotating wheel (3) is provided on the front surface of the protective box (4) located on the front side. The rear end of the rotating wheel (3) rotates through into the interior of the corresponding protective box (4) and is fixedly connected to the front end of the second worm (14).