Anti-falling lifting hook

Abstract

The anti-falling lifting hook comprises a hook head, the top end of the hook head is fixedly connected with a connecting block, the top surface of the connecting block is fixedly connected with a connector, and the opening end of the hook head is rotationally connected with a protective rod; two limiting plates arranged at intervals are fixedly connected to the side wall of the end, close to the protection rod, of the connecting block, the two side walls of the top of the protection rod are slidably connected with the inner side walls, right opposite to the two limiting plates, of the two limiting plates correspondingly, and limiting assemblies used for limiting rotation of the protection rod are arranged on the two limiting plates. The lifting hook can be suitable for lifting ropes with different diameters, the applicability of the lifting hook is improved, and the situation that when the lifting rope is thick, the lifting hook cannot be closed, and consequently the anti-falling function fails is avoided.

Description

Technical Field

[0001] This utility model relates to the field of lifting hook technology, and in particular to an anti-fall-off lifting hook. Background Technology

[0002] A crane hook is a crucial component in lifting machinery used for suspending and lifting heavy objects. It is typically forged or stamped from high-strength steel and is mostly hook-shaped, with single and double hooks being common types. During operation, the hook, in conjunction with wire ropes and hoists, transmits tension to the lifting equipment. It is widely used in material handling and hoisting operations in factories, construction sites, ports, and other similar settings. Anti-detachment hooks are a critical safety feature in lifting operations. Based on traditional hooks, they incorporate anti-detachment components that lock the hook in place after the load is secured, preventing accidental detachment.

[0003] Existing hook anti-detachment components have a relatively simple structure, usually consisting of a flip-up metal plate (lock) and a connecting shaft. One end of the lock is fixed to one side of the hook opening by a pin, and the lock is connected to the hook body by a spring. Under normal conditions, the spring force causes the lock to close the hook opening, and the lock is only pushed open by overcoming the spring force when the lifting device is inserted. For example, the utility model patent with authorization announcement number CN207890903U discloses an anti-fall hook, including a hook body, an anti-rotation device, and an anti-fall device: the anti-rotation device includes a rotating part and a fixing part, the bottom of the rotating part is provided with a fixing groove, the cross-sectional area of ​​the opening of the fixing groove is smaller than the cross-sectional area inside the fixing groove, the fixing part includes a fixing part top and a connecting part, the fixing part top is inside the fixing groove and can rotate horizontally inside the fixing groove, the cross-sectional area of ​​the fixing part top is larger than the cross-sectional area of ​​the opening of the fixing groove and smaller than the cross-sectional area inside the fixing groove, the connecting part is connected to the top of the hook body, the anti-fall device is connected between the top of the hook body and the hook tooth, and the anti-fall device includes a baffle, the baffle is hinged to the hook body.

[0004] In actual use, although the anti-loosening device of the above-mentioned utility model patent can prevent loosening during the hanging process, the baffle in the device can only rotate inward to the hook and the movement trajectory is arc-shaped. When the lifting rope is thick, the lifting rope will intersect with the movement trajectory of the baffle, which will cause the compression spring to fail to press the baffle on the hook teeth, and the hook will fail to close the hook mouth, thus rendering the anti-loosening device ineffective.

[0005] Therefore, it is necessary to develop a hook that prevents detachment to address the aforementioned defects. Utility Model Content

[0006] The purpose of this utility model is to provide an anti-fall hook that can be used with lifting ropes of different diameters, improve the applicability of the hook, and avoid the failure of the anti-fall function due to the hook not being able to close when the lifting rope is too thick.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] This utility model discloses an anti-fall hook, including a hook head, a connecting block fixedly connected to the top of the hook head, a connecting head fixedly connected to the top surface of the connecting block, and a protective rod rotatably connected to one open end of the hook head; two spaced limiting plates are fixedly connected to the side wall of the connecting block near the protective rod, and the top two side walls of the protective rod are slidably connected to the inner side walls of the two limiting plates respectively, and limiting components for limiting the rotation of the protective rod are provided on the two limiting plates.

[0009] Furthermore, the limiting assembly includes two rotating rods, one end of which is rotatably connected to the outer wall of the two limiting plates, and a limiting rod is provided between the top ends of the two rotating rods; a sliding block is fixedly connected to the top end of the protective rod, and the two side walls of the sliding block are slidably connected to the inner side walls of the two limiting plates facing each other. A limiting groove adapted to the limiting rod is horizontally opened on the side wall of the sliding block away from the connecting block, and an elastic element is provided on the connecting block between the two limiting plates.

[0010] Furthermore, the elastic element includes a slide rod, a compression spring, and a baffle. A sliding hole is provided on the inner wall of the connecting block. One end of the slide rod is slidably connected in the sliding hole, and the baffle is fixedly connected to the other end of the slide rod. The compression spring is sleeved on the slide rod, and both ends of the compression spring are fixedly connected to the connecting block and the baffle, respectively.

[0011] Furthermore, the limiting plate has a circular structure and its arc surface is fixedly connected to the connecting block. The side of the sliding block away from the connecting block is an arc surface, and the limiting groove is formed on the arc surface of the sliding block.

[0012] Furthermore, the two ends of the limiting rod are rotatably connected to the two rotating rods, and the outer wall of the limiting rod is in contact with the arc surface of the limiting plate.

[0013] Furthermore, a lever is fixedly connected between the top ends of the two rotating rods.

[0014] Furthermore, a limiting post is fixedly connected to the outer wall of the limiting plate, and the limiting post is used to limit the limiting rod.

[0015] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0016] This invention utilizes a rotating connection between the protective rod and the hook head, and a sliding connection between the protective rod and two limiting plates. This prevents the protective rod from rotating inside the hook head, avoiding interference from the lifting rope and thus preventing the hook from closing and disabling the anti-fall-off function. It is applicable to lifting ropes of different diameters, improving the hook's versatility. Simultaneously, by setting limiting components on the two limiting plates, the top of the protective rod can be fixed and limited, keeping the protective rod and hook head in a closed state and preventing the protective rod from accidentally detaching from the limiting plates, thus avoiding the failure of the anti-fall-off function due to the protective rod becoming loose. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the anti-fall-off hook of this utility model;

[0019] Figure 2 This is a three-dimensional structural schematic diagram of the anti-fall-off hook of this utility model from another perspective;

[0020] Figure 3 This is a three-dimensional structural diagram of the protective rod of this utility model;

[0021] Figure 4 This is a cross-sectional view of the anti-fall-off hook of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Hook head; 2. Connecting block; 3. Connecting head; 4. Protective rod; 5. Limiting plate; 6. Limiting assembly; 601. Rotating rod; 602. Limiting rod; 603. Sliding block; 604. Limiting groove; 605. Elastic element; 6051. Sliding rod; 6052. Compression spring; 6053. Baffle; 6054. Sliding hole; 606. Actuating rod; 607. Limiting post. Detailed Implementation

[0023] The core of this utility model is to provide an anti-fall hook that can be used with ropes of different diameters, thereby improving the applicability of the hook and preventing the anti-fall function from failing when the rope is too thick and the hook cannot close.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. 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.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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 simplifying the description, 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.

[0026] In one specific embodiment of this utility model, such as Figure 1 As shown, the device includes a hook head 1, a connecting block 2 fixedly connected to the top of the hook head 1, a connecting head 3 fixedly connected to the top surface of the connecting block 2, and a protective rod 4 rotatably connected to one open end of the hook head 1. Two spaced-apart limiting plates 5 are fixedly connected to the side wall of the connecting block 2 near the protective rod 4. The top two side walls of the protective rod 4 are slidably connected to the inner side walls of the two limiting plates 5 respectively. Limiting components 6 for limiting the rotation of the protective rod 4 are provided on the two limiting plates 5.

[0027] Hook 1 is used to suspend and lift heavy objects. Connector 3 connects the hook to the lifting equipment. The specific structure of connector 3 and the specific connection method with the lifting equipment are existing technologies and will not be described in detail here. The hook opening is opened and closed by rotating the guard rod 4 outside the hook head 1. The limiting plate 5 and the limiting component 6 cooperate to limit the rotation of the guard rod 4 and ensure the hook's anti-derailment function.

[0028] In one specific embodiment of this utility model, such as Figures 2-4 As shown, the limiting assembly 6 includes two rotating rods 601, one end of which is rotatably connected to the outer wall of the two limiting plates 5 respectively. A limiting rod 602 is provided between the top ends of the two rotating rods 601. A sliding block 603 is fixedly connected to the top end of the protective rod 4. The two side walls of the sliding block 603 are slidably connected to the inner side walls of the two limiting plates 5 facing each other. A limiting groove 604 adapted to the limiting rod 602 is horizontally opened on the side wall of the sliding block 603 away from the connecting block 2. An elastic element 605 is provided on the connecting block 2 between the two limiting plates 5.

[0029] The limiting rod 602 is supported and fixed by two rotating rods 601. These two rods 601 act as transmission components, driving the limiting rod 602 to rotate until it engages with the limiting groove 604, thus mechanically constraining the rotational freedom of the protective rod 4 and preventing the protective rod 4 from accidentally opening the hook 1. The elastic element 605 continuously applies a pushing force to the sliding block 603, preventing the limiting rod 602 from slipping out of the limiting groove 604.

[0030] Specifically, the elastic element includes a slide rod 6051, a compression spring 6052, and a baffle 6053. A sliding hole 6054 is provided on the inner wall of the connecting block 2. One end of the slide rod 6051 is slidably connected in the sliding hole 6054, and the baffle 6053 is fixedly connected to the other end of the slide rod 6051. The compression spring 6052 is sleeved on the slide rod 6051, and both ends of the compression spring 6052 are fixedly connected to the connecting block 2 and the baffle 6053, respectively.

[0031] Specifically, the limiting plate 5 has a circular structure and its arc surface is fixedly connected to the connecting block 2. The side of the sliding block 603 away from the connecting block 2 is an arc surface, and the limiting groove 604 is opened on the arc surface of the sliding block 603.

[0032] It should be noted that one end of the rotating rod 601 is rotatably connected to the center of the outer wall of the limiting plate 5, causing the side wall of the limiting rod 602 to slide around the arc surface of the limiting plate 5. After the lifting rope is hooked onto the hook 1, the protective rod 4 is rotated, causing the sliding block 603 at the top of the protective rod 4 to slide into the gap between the two limiting plates 5 and come into contact with the baffle 6053. By rotating the rotating rod 601, the limiting rod 602 slides around the arc surface of the limiting plate 5. When it slides to the arc surface of the sliding block 603, the limiting rod 602 will drive the sliding block 603 to slide on the inner wall of the two limiting plates 5. The driving baffle 6053 will drive the sliding rod 6051 to slide in the sliding hole 6054 and compress the compression spring 6052. When the limiting rod 602 slides to the limiting groove 604 of the sliding block 603, the compression spring 6052 will drive the baffle 6053 to slide the sliding block 603 outward through the restoring force, so that the limiting rod 602 is stuck in the limiting groove 604.

[0033] Specifically, the two ends of the limiting rod 602 are rotatably connected to the two rotating rods 601, and the outer wall of the limiting rod 602 is in contact with the arc surface of the limiting plate 5.

[0034] By rotating the limit rod 602 and the rotating rod 601, the friction between the outer wall of the limit rod 602 and the arc surface of the limit plate 5 can be reduced, making it easier for the rotating rod 601 to drive the limit rod 602 to slide on the arc surface of the limit plate 5.

[0035] Specifically, a lever 606 is fixedly connected between the top ends of the two rotating rods 601.

[0036] The toggle lever 606 allows operators to manually rotate the lever 601, thereby controlling the engagement and disengagement of the limit lever 602 and the limit groove 604.

[0037] Specifically, a limiting post 607 is fixedly connected to the outer wall of the limiting plate 5, and the limiting post 607 is used to limit the limiting rod 602.

[0038] By setting the limiting post 607, the rotation angle of the limiting rod 602 is limited, ensuring that after the limiting rod 602 is engaged with the limiting groove 604, it will no longer continue to slide downward along the limiting plate 5.

[0039] The working principle of this utility model is as follows: When using the anti-fall hook of this utility model, when it is necessary to attach a lifting device, the operator presses the protective rod 4, causing the sliding block 603 at the top of the protective rod 4 to slide between the two limiting plates 5, so that the limiting rod 602 disengages from the limiting groove 604. Then, the operator moves the actuating rod 606 upward, driving the two rotating rods 601 to move the limiting rod 602 upward on the arc surface of the limiting plate 5. At this time, the operator rotates the protective rod 4 downward to open the hook opening, and the lifting rope or lifting device is hooked into the hook head 1. Then, the operator rotates the protective rod 4 upward to close the hook opening, and the sliding block 603 at the top of the protective rod 4 slides into the gap between the two limiting plates 5, contacts the baffle 6053, and compresses the compression spring 6052. Move the lever 606 downwards to drive the two rotating rods 601, which in turn drive the limiting rod 602 to slide downwards on the arc surface of the limiting plate 5. When the limiting rod 602 reaches the arc surface of the sliding block 603, it drives the sliding block 603 to slide on the inner walls of the two limiting plates 5. This drives the baffle 6053 to move the sliding rod 6051 within the sliding hole 6054, further compressing the compression spring 6052. When the limiting rod 602 slides into the limiting groove 604 of the sliding block 603, the compression spring 6052, through its restoring force, drives the baffle 6053 to move the sliding block 603 outwards, causing the limiting rod 602 to engage in the limiting groove 604. When it is necessary to remove the lifting device, press the protective rod 4 again and move the lever 606 upwards to release the limit, allowing the hook to be opened and the lifting device removed.

[0040] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0041] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A type of anti-fall-off hook, characterized in that: Includes a hook head (1), a connecting block (2) is fixedly connected to the top of the hook head (1), a connecting head (3) is fixedly connected to the top surface of the connecting block (2), and a protective rod (4) is rotatably connected to one open end of the hook head (1); two spaced limiting plates (5) are fixedly connected to the side wall of the connecting block (2) near the protective rod (4), and the top two side walls of the protective rod (4) are slidably connected to the inner side walls of the two limiting plates (5) respectively, and limiting components (6) for limiting the rotation of the protective rod (4) are provided on the two limiting plates (5).

2. The anti-fall hook according to claim 1, characterized in that: The limiting component (6) includes two rotating rods (601), one end of which is rotatably connected to the outer wall of the two limiting plates (5), and a limiting rod (602) is provided between the top ends of the two rotating rods (601); a sliding block (603) is fixedly connected to the top end of the protective rod (4), and the two side walls of the sliding block (603) are slidably connected to the inner side walls of the two limiting plates (5) facing each other. A limiting groove (604) adapted to the limiting rod (602) is horizontally opened on the side wall of the sliding block (603) away from the connecting block (2), and an elastic element (605) is provided on the connecting block (2) between the two limiting plates (5).

3. The anti-fall hook according to claim 2, characterized in that: The elastic element includes a slide rod (6051), a compression spring (6052), and a baffle (6053). A sliding hole (6054) is provided on the inner wall of the connecting block (2). One end of the slide rod (6051) is slidably connected in the sliding hole (6054), and the baffle (6053) is fixedly connected to the other end of the slide rod (6051). The compression spring (6052) is sleeved on the slide rod (6051), and both ends of the compression spring (6052) are fixedly connected to the connecting block (2) and the baffle (6053) respectively.

4. The anti-fall hook according to claim 3, characterized in that: The limiting plate (5) has a circular structure and its arc surface is fixedly connected to the connecting block (2). The side of the sliding block (603) away from the connecting block (2) is an arc surface, and the limiting groove (604) is opened on the arc surface of the sliding block (603).

5. The anti-fall hook according to claim 4, characterized in that: The two ends of the limiting rod (602) are rotatably connected to the two rotating rods (601), and the outer wall of the limiting rod (602) is in contact with the arc surface of the limiting plate (5).

6. The anti-fall hook according to claim 5, characterized in that: A lever (606) is fixedly connected between the top ends of the two rotating rods (601).

7. The anti-fall hook according to claim 6, characterized in that: A limiting post (607) is fixedly connected to the outer wall of the limiting plate (5), and the limiting post (607) is used to limit the limiting rod (602).

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