Anti-falling device for lifting hook

Abstract

The utility model belongs to the technical field of safety of hoisting equipment, and particularly relates to a lifting hook anti-falling device which comprises a mounting seat fixedly connected to lug plates, a connecting shaft connected between the two lug plates, through holes formed in the two lug plates, the through holes are formed below the connecting shaft, a limiting piece is detachably connected to the mounting seat and matched with the through holes, and the limiting piece is connected with the connecting shaft. The limiting piece is parallel to the connecting shaft, and the limiting piece is in frictional contact with the lifting hook. The anti-unhooking device is easy to operate, can effectively prevent unhooking, and improves operation safety.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment safety technology, and in particular relates to a hook anti-detachment device. Background Technology

[0002] During crane lifting operations, the crane hook hanging on the lifting lug often needs to be lowered to a certain height to ensure that the lifted object is placed in the designated position. When making minor adjustments to the position of the lifted object, it is often necessary to lift the object again after it has been lowered to the ground. During this operation, the hook often comes off the pin on the lifting lug, requiring the operator to hook the hook back onto the pin on the lifting lug from below the crane. This not only causes inconvenience in lifting but also poses a safety hazard.

[0003] To address this issue, a hook anti-detachment device is provided, which solves the aforementioned problem. Utility Model Content

[0004] The purpose of this invention is to provide a hook anti-detachment device to solve the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides a hook anti-detachment device, including a mounting base fixedly connected to the ear plates, a connecting shaft connecting the two ear plates, and through holes provided on both ear plates, the through holes being located below the connecting shaft. A limiting member is detachably connected to the mounting base, the limiting member being adapted to the through holes, the limiting member being parallel to the connecting shaft, and the limiting member being in frictional contact with the hook.

[0006] Preferably, the mounting base includes a cover, which is fixedly attached to an ear plate. The cover has a through hole, which is coaxially arranged with the through hole. An annular groove is formed on the side of the cover near the ear plate. The annular groove communicates with the through hole, and the diameter of the through hole is smaller than the outer diameter of the annular groove. The annular groove and the ear plate enclose an open receiving cavity, and the limiting member is slidably limited within the receiving cavity.

[0007] Preferably, the limiting member includes a locking pin, a limiting block is provided on the outer wall of one end of the locking pin, and a notch is provided at the edge of the through hole, the outer dimension of the limiting block is smaller than the size of the notch.

[0008] Preferably, the limiting block is a limiting post threadedly connected to the outer wall of the locking pin, the limiting post is located at one end of the locking pin, and the locking pin is slidably limited within the receiving cavity.

[0009] Preferably, a handle is connected to one end of the locking pin near the limiting post.

[0010] Preferably, the handle has an L-shaped structure.

[0011] Preferably, the notch is located above the locking pin.

[0012] Compared with the prior art, the present invention has the following advantages and technical effects:

[0013] This utility model provides a hook anti-detachment device, in which a fixed seat is provided to facilitate the detachable connection of the limiting component to the two ear plates. The limiting component passes through the two ear plates, thereby limiting the vertical position of the hook and preventing the hook from separating from the connecting shaft, thus effectively preventing detachment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a hook anti-detachment device proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the limiting component in the locked state in this utility model;

[0017] Figure 3 This is a schematic diagram of the limiting component in the unlocked state in this utility model;

[0018] The components include: 1. cover; 2. notch; 3. annular groove; 4. locking pin; 5. limit post; 6. handle; 7. hook; 8. ear plate; 9. through hole; 10. connecting shaft; 11. through hole. Detailed Implementation

[0019] 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.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The technical terms used in the embodiments are explained below:

[0022] Cranes are heavy machinery widely used in industry, construction, ports, and mining, primarily for lifting, handling, and moving heavy objects. The following is a detailed analysis of cranes:

[0023] I. Definition and Function:

[0024] A crane is a mechanical device that uses pulleys, wire ropes, or other transmission mechanisms and hooks or other lifting devices to lift, lower, or move heavy objects horizontally. Its main functions include hoisting, handling, installation, unloading, and stacking heavy objects.

[0025] II. Structure and Composition:

[0026] Cranes typically consist of the following main parts:

[0027] Drive unit: such as electric motor, internal combustion engine, etc., provides the power required for the operation of the crane.

[0028] Working mechanisms: including hoisting mechanisms, traveling mechanisms, and luffing mechanisms, used to lift, move, and position heavy objects.

[0029] Lifting devices: such as hooks, grabs, electromagnetic chucks, etc., are used to grab and lift heavy objects.

[0030] Metal structure: mainly made of materials such as shaped steel and steel plates, forming the skeleton of the crane and bearing various loads.

[0031] III. Types and Classifications:

[0032] Cranes can be classified into various types based on their purpose, structure, working principle, and performance characteristics, such as:

[0033] Cranes can be classified by their use: construction cranes, port cranes, mining cranes, loading and unloading cranes, etc.

[0034] According to structure, cranes can be classified as: bridge cranes, gantry cranes, tower cranes, jib cranes, etc.

[0035] According to working principle, cranes can be classified as: fixed column rotary cranes, luffing jib cranes, cable cranes, etc.

[0036] IV. Working Principle and Operation:

[0037] The working principle of a crane is mainly based on the labor-saving principle of pulley systems and the lever principle. Power is provided by a drive unit, and the working mechanism achieves the lifting, lowering, moving, and positioning of heavy objects. During operation, it is necessary to follow the crane's operating procedures and safety precautions to ensure the safety of operators and the normal operation of the equipment.

[0038] V. Application Areas and Importance:

[0039] Cranes play an important role in many fields, such as:

[0040] Industrial applications: Used for material handling and equipment installation on production lines.

[0041] In the construction field: used for hoisting building materials and installing components on construction sites.

[0042] In the port sector: used for loading, unloading, and stacking of goods.

[0043] Mining sector: Used for ore extraction and transportation.

[0044] VI. Maintenance and Care:

[0045] To ensure the normal operation and extend the service life of the crane, regular maintenance and upkeep are necessary. This includes checking the wear and tear of various components, replacing damaged parts, cleaning equipment surfaces, and lubricating the transmission mechanism.

[0046] VII. Safety Precautions:

[0047] When operating a crane, it is essential to strictly adhere to safe operating procedures and pay attention to the following:

[0048] Before operation, check the integrity and safety of the equipment.

[0049] Ensure that lifting devices such as hooks and wire ropes are secure and reliable.

[0050] Avoid overloading and oblique lifting.

[0051] Pay attention to the safety of your surroundings and avoid accidents such as collisions and electric shocks.

[0052] In conclusion, cranes, as important heavy machinery, play an irreplaceable role in many fields. To ensure their normal operation and safety, regular maintenance and upkeep are necessary, and operating procedures and safety precautions must be strictly followed.

[0053] Reference Figures 1 to 3 As shown, this utility model provides a hook anti-detachment device, including a mounting base fixedly connected to the ear plate 8, a connecting shaft 10 connected between the two ear plates 8, and through holes 9 on both ear plates 8. The through holes 9 are located below the connecting shaft 10. A limiting member is detachably connected to the mounting base. The limiting member is adapted to the through hole 9, and the limiting member is parallel to the connecting shaft 10. The limiting member is in frictional contact with the hook 7.

[0054] The fixed seat allows the limiting component to be detachably connected to the two ear plates 8. The limiting component passes through the two ear plates 8, thereby limiting the vertical position of the hook 7 and preventing the hook 7 from separating from the connecting shaft 10, thus effectively preventing disengagement.

[0055] Furthermore, the mounting base includes a cover 1, which is fixedly attached to an ear plate 8. A through hole 11 is provided on the cover 1, which is coaxially arranged with the through hole 9. An annular groove 3 is provided on the side of the cover 1 near the ear plate 8. The annular groove 3 communicates with the through hole 11, and the diameter of the through hole 11 is smaller than the outer diameter of the annular groove 3. The annular groove 3 and the ear plate 8 enclose an open receiving cavity, and the limiting member is slidably limited in the receiving cavity.

[0056] In this embodiment, the side of the cover 1 with the annular groove 3 is attached to the ear plate 8, and the axes of the through hole 11 and the through hole 9 are collinear. The cover 1 and the ear plate 8 are then firmly connected by welding.

[0057] The limiter slides within the open cavity, allowing for detachable connection between the limiter and the cover 1. This facilitates control over the engagement or disengagement of the hook 7 and the connecting shaft 10, enabling rapid switching between the locked and unlocked states of the hook 7.

[0058] Furthermore, the limiting component includes a locking pin 4, a limiting block is provided on the outer wall of one end of the locking pin 4, and a notch 2 is provided at the edge of the through hole 11. The outer dimension of the limiting block is smaller than the dimension of the notch 2.

[0059] The notch 2 allows the locking pin 4 to move the limiting block through, and the locking pin 4 is limited in the open receiving cavity. At the same time, the end of the locking pin 4 away from the limiting block passes through the through hole 9 on the other ear plate 8. Then, by rotating the locking pin 4, the limiting block is displaced from the notch 2, thereby locking and preventing the locking pin 4 from falling off the ear plate 8, thus improving the reliability of the locking pin 4 in vertically limiting the hook 7.

[0060] Furthermore, the limiting block is a limiting post 5 threadedly connected to the outer wall of the locking pin 4. The limiting post 5 is located at one end of the locking pin 4, and the locking pin 4 is slidably limited within the receiving cavity.

[0061] Furthermore, to facilitate the rotation of the locking pin 4, a handle 6 is connected to one end of the locking pin 4 near the limiting post 5. The handle 6 has an L-shaped structure.

[0062] Furthermore, in order to prevent the limiting pin 5 on the locking pin 4 from accidentally coming off the notch 2, the notch 2 is located above the locking pin 4.

[0063] The working principle of the hook anti-detachment device provided by this utility model is as follows: When in use, the hook 7 is engaged with the connecting shaft 10, the locking pin 4 is aligned with the through hole 11 on the cover 1, and the locking pin 4 is inserted into the through hole 9 on the two ear plates 8. Simultaneously, the limiting post 5 on the locking pin 4 is aligned with the notch 2 on the cover 1. As the locking pin 4 is gradually inserted, the limiting post 5 passes through the notch 2 and enters the open receiving cavity. Then, the handle 6 is rotated, causing the locking pin 4 and the limiting post 5 to rotate, thus disengaging the limiting post 5 from the notch 2 and limiting the limiting post 5 to its designated position. Within the open receiving cavity, the locking pin 4 is positioned and connected to the two ear plates 8, effectively preventing the limiting post 5 on the locking pin 4 from coming out of the open receiving cavity during lifting. At this time, the locking pin 4 restricts the vertical movement of the hook 7 and is in a locked state, allowing the crane to be operated for lifting and moving of objects. After the object is moved, simply turn the handle 6 again to align the limiting post 5 with the notch 2 and pull the locking pin 4 outward. At this time, the vertical restriction of the hook 7 by the locking pin 4 is released, and the hook 7 is in an unlocked state. Then, the hook 7 can be removed.

[0064] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0065] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A hook anti-derailment device, characterized in that, The device includes a mounting base fixedly connected to the ear plate (8), a connecting shaft (10) connecting the two ear plates (8), and through holes (9) provided on both ear plates (8). The through holes (9) are located below the connecting shaft (10). A limiting member is detachably connected to the mounting base. The limiting member is adapted to the through hole (9), and the limiting member is arranged parallel to the connecting shaft (10). The limiting member is in frictional contact with the hook (7).

2. The hook anti-detachment device according to claim 1, characterized in that, The mounting base includes a cover (1), which is fixed to an ear plate (8). The cover (1) has a through hole (11) and is coaxially arranged with the through hole (9). The cover (1) has an annular groove (3) on the side near the ear plate (8). The annular groove (3) communicates with the through hole (11), and the diameter of the through hole (11) is smaller than the outer diameter of the annular groove (3). The annular groove (3) and the ear plate (8) enclose an open receiving cavity, and the limiting member is slidably limited within the receiving cavity.

3. The hook anti-detachment device according to claim 2, characterized in that, The limiting component includes a locking pin (4), and a limiting block is provided on the outer wall of one end of the locking pin (4). A notch (2) is provided at the edge of the through hole (11), and the outer dimension of the limiting block is smaller than the dimension of the notch (2).

4. The hook anti-detachment device according to claim 3, characterized in that, The limiting block is a limiting post (5) threadedly connected to the outer wall of the locking pin (4). The limiting post (5) is located at one end of the locking pin (4), and the locking pin (4) is slidably limited within the receiving cavity.

5. The hook anti-detachment device according to claim 4, characterized in that, A handle (6) is connected to one end of the locking pin (4) near the limiting post (5).

6. The hook anti-detachment device according to claim 5, characterized in that, The handle (6) has an L-shaped structure.

7. The hook anti-detachment device according to claim 3, characterized in that, The notch (2) is located above the locking pin (4).

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