Crane hook anti-falling device

Abstract

The utility model discloses an anti-dropping device of a crane hook, which relates to the technical field of crane hooks, and comprises a hook seat and a hook main body arranged below the hook seat, the top end of the hook main body is fixedly provided with a connecting rod, the connecting rod is rotatably arranged at the bottom end of the hook seat, the middle part of the hook main body is provided with a through groove in a penetrating manner, and the through groove is provided with a through hole. A tongue plate is rotatably arranged in the through groove, a limiting block is slidably arranged at the top end in the through groove, and the two sides of the limiting block are each of an inclined structure. According to the lifting hook, the lifting hook body, the tongue plate and the limiting block are arranged, the tongue plate can rotate in the through groove in the lifting hook body and is limited by the limiting block after rotating, and when a lifting rope or a lifting ring is installed on the lifting hook body, the tongue plate can rotate by a circle to penetrate through the through groove and then reset; therefore, the tongue plate can be prevented from being interfered by a lifting rope or a lifting ring and cannot be reset to affect the anti-falling effect.

Description

Technical Field

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

[0002] Single-girder cranes and double-girder cranes, commonly used in the machinery industry, are generally referred to as "overhead cranes." As critical equipment for process turnover, overhead cranes not only facilitate the handling of workpieces but also significantly impact the safety of lifting personnel. To ensure operator safety, existing overhead cranes are equipped with spring-loaded anti-disengagement devices. However, these devices have been found to have drawbacks in terms of short lifespan and poor effectiveness over long-term use. This is particularly problematic in the heavy machinery industry, where the workpieces being lifted are heavy, the hooks are frequently loaded and unloaded, and the lifting rings are heavy. Inevitably, collisions occur when operators use their hands to lift the rings and chains and attach them to the hook, causing the anti-disengagement device to lose its locking function due to baffle deformation and spring malfunction, creating a safety hazard.

[0003] In practical applications, existing hooks are equipped with anti-detachment mechanisms to prevent the lifting rope or ring from falling off. However, the existing anti-detachment mechanisms are prone to interference with the lifting rope or ring. When the lifting rope or ring is too heavy, the anti-detachment mechanism is easily pressed into the hook and cannot be reset. This not only fails to achieve the effect of preventing falling off, but also affects the installation stability of the lifting rope or ring.

[0004] Therefore, it is necessary to invent a crane hook anti-detachment device to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a crane hook anti-detachment device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a crane hook anti-detachment device, comprising a hook seat and a hook body installed below the hook seat, a connecting rod fixedly provided at the top end of the hook body, the connecting rod being rotatably disposed at the bottom end of the hook seat, a through groove penetrating the middle of the hook body, a tongue plate rotatably provided inside the through groove, a limiting block slidably provided at the top end of the through groove, both sides of the limiting block being inclined structures, and a slip ring fixedly provided at the top end of the limiting block, and the slip ring... The sliding ring is slidably located on the outer top of the hook body. The top of the sliding ring is rotatably provided with a limiting ring via a bearing. The top of the outer wall of the limiting ring has two symmetrically distributed limiting grooves. The top of the outer wall of the hook body is fixedly provided with two limiting rods that are adapted to the limiting grooves. The top of the outer wall of the hook body has two sets of symmetrically distributed positioning grooves, and each set of positioning grooves has two. The inner wall of the limiting ring is fixedly provided with two symmetrically distributed positioning blocks, and each positioning block is adapted to the two positioning grooves.

[0007] Preferably, both the positioning block and the positioning groove are designed as semi-circular structures, and the positioning block is designed as a deformable rubber block.

[0008] Preferably, a fixed seat is fixedly provided at the top of the outer side wall of the hook body, and the fixed seat is located at the opening of the through groove. The fixed seat is provided with a movable block that can be rotatably provided inside by a pin, and a torsion spring is provided between the movable block and the fixed seat.

[0009] Preferably, the bottom end of the movable block is fixedly provided with a stop block, the stop block is located inside the through groove, and the stop block is designed as an arc-shaped structure adapted to the tongue plate.

[0010] Preferably, the through groove is provided with a plurality of reinforcing rods, and the plurality of reinforcing rods are respectively misaligned with the rotation trajectory of the tongue plate.

[0011] Preferably, a bonding plate is fixedly provided at the top of the hook body, and the bonding plate is rotatably located below the hook seat.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model, by setting up a hook body, a tongue plate, and a limiting block, allows the tongue plate to rotate within a through groove inside the hook body and be limited by the limiting block after rotation. When the lifting rope or shackle is installed on the hook body, the tongue plate can rotate one revolution through the through groove and then reset, thus avoiding interference from the lifting rope or shackle that prevents the tongue plate from resetting and affecting its anti-detachment effect. Furthermore, the limiting block can slide up and down within the through groove and is in a locked position. The position of the limiting block does not need to be locked when the lifting rope or shackle is installed. During the rotation and reset process, the tongue plate can squeeze the limiting block to make it move, so as to facilitate the rapid reset of the tongue plate. After the lifting rope or shackle is installed, rotating the limiting ring above the limiting block can lock its position, thereby achieving rapid locking of the tongue plate position, thus improving the installation efficiency of the lifting rope and shackle and facilitating the use of the device.

[0014] 2. This utility model, by setting a movable block and a stop block, allows the movable block to drive the stop block to rotate within the through groove. Furthermore, the movable block is subjected to a torsion spring, causing the stop block to be subjected to a force in the direction of the tongue plate. During the resetting process, the tongue plate can be blocked by the stop block, which helps to determine the position of the tongue plate. In addition, the stop block and the limiting block can restrict the position of the tongue plate, thereby preventing the tongue plate from shaking during hoisting operations and affecting the anti-detachment effect of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the hook body and tongue plate structure of this utility model.

[0017] Figure 3 This is a cross-sectional schematic diagram of the main structure of the hook of this utility model.

[0018] Figure 4 This is a cross-sectional schematic diagram of the main structure of the hook of this utility model.

[0019] Figure 5 This is a schematic diagram of the main structure of the hook of this utility model.

[0020] Figure 6 This is a schematic diagram of the limiting ring structure of this utility model.

[0021] In the diagram: 1. Hook seat; 2. Hook body; 3. Connecting rod; 4. Through groove; 5. Tongue plate; 6. Limiting block; 7. Slip ring; 8. Limiting ring; 9. Limiting groove; 10. Limiting rod; 11. Positioning groove; 12. Positioning block; 13. Fixed seat; 14. Movable block; 15. Torsion spring; 16. Stop block; 17. Reinforcing rod; 18. Adhesive plate. Detailed Implementation

[0022] 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.

[0023] This utility model provides, for example Figure 1-6 The crane hook anti-detachment device shown includes a hook seat 1 and a hook body 2 installed below the hook seat 1. A connecting rod 3 is fixedly provided at the top of the hook body 2, and the connecting rod 3 is rotatably provided at the bottom of the hook seat 1. A through groove 4 is provided through the middle of the hook body 2. A tongue plate 5 is rotatably provided inside the through groove 4. A limiting block 6 is slidably provided at the top of the through groove 4. Both sides of the limiting block 6 are provided with inclined structures. The design of the inclined structures allows the limiting block 6 to move upward when it is squeezed by the tongue plate 5.

[0024] A sliding ring 7 is fixedly provided at the top of the limiting block 6, and the sliding ring 7 is slidably located at the top outer side of the hook body 2. A limiting ring 8 is rotatably provided at the top of the sliding ring 7 via a bearing. Two symmetrically distributed limiting grooves 9 are provided at the top outer side wall of the limiting ring 8. Two limiting rods 10 that are adapted to the limiting grooves 9 are fixedly provided at the top outer side wall of the hook body 2. Two sets of symmetrically distributed positioning grooves 11 are provided at the top outer side wall of the hook body 2, and two positioning grooves 11 are provided in each set. The inner wall of the positioning ring 8 is fixed with two symmetrically distributed positioning blocks 12, and each positioning block 12 is adapted to two positioning grooves 11. Both the positioning block 12 and the positioning groove 11 are designed as semi-circular structures, and the positioning block 12 is designed as a deformable rubber block. The positioning block 12 cooperates with the positioning groove 11 to prevent the limiting ring 8 from rotating automatically. When the positioning block 12 coincides with the two positioning grooves 11, the limiting groove 9 on the outer side of the limiting ring 8 and the limiting rod 10 are respectively in the overlapping and misaligned states.

[0025] A fixed seat 13 is fixedly provided at the top of the outer side wall of the hook body 2, and the fixed seat 13 is located at the opening of the through groove 4. The fixed seat 13 is rotatably provided with a movable block 14 through a pin, and a torsion spring 15 is provided between the movable block 14 and the fixed seat 13. A stop block 16 is fixedly provided at the bottom of the movable block 14. The stop block 16 is located inside the through groove 4, and the stop block 16 is designed with an arc-shaped structure that matches the tongue plate 5. The stop block 16 is used to assist in positioning the tongue plate 5, and presses the tongue plate 5 against the inner side of the limiting block 6 under the action of the torsion spring 15. It should be noted that when the stop block 16 is subjected to the action of the torsion spring 15, its inner wall is in contact with the opening of the through groove 4. At this time, the position of the stop block 16 corresponds to the position of the tongue plate 5 locking the lifting rope or lifting ring.

[0026] Multiple reinforcing rods 17 are fixedly installed inside the through groove 4, and the multiple reinforcing rods 17 are respectively misaligned with the rotation trajectory of the tongue plate 5. The setting of the reinforcing rods 17 can improve the structural strength of the hook body 2.

[0027] A fitting plate 18 is fixedly provided at the top of the hook body 2. The fitting plate 18 is rotatably located below the hook seat 1. The fitting plate 18 ensures that the hook body 2 will not tilt relative to the hook seat 1.

[0028] Working principle of this utility model:

[0029] When this device is in use, the hook body 2 is installed on the crane's traction rope via the hook seat 1. The lifting rope or shackle can be hung on the hook body 2 to facilitate lifting operations. When the lifting rope or shackle is connected to the hook body 2, the limiting ring 8 is rotated first, causing the limiting groove 9 on the outer side of the limiting ring 8 to rotate below the limiting rod 10. At this time, the limiting ring 8 can slide upward without being interfered with by the limiting rod 10. Then, the lifting rope or shackle is placed above the hook body 2, and the lifting rope or shackle moves downward into the hook body 2. During this process, the lifting rope or shackle presses down on the tongue plate 5, causing the tongue plate 5 to rotate around the pin. At this time, the tongue plate 5 presses against the stop block 16, causing the stop block 16 to drive the movable block 14 to rotate until the stop block 16 separates from the tongue plate 5. At this time, the tongue plate 5 continues to rotate into the through groove 4. At this time, the lifting rope or shackle is completely inside the hook body 2. At this time, the installation of the lifting rope or shackle inside the hook body 2 is completed without being restricted by the tongue plate 5.

[0030] Then continue to turn the tongue plate 5 until it rotates one full turn and resets. During the reset process, the tongue plate 5 contacts the bottom of the outer wall of the limiting block 6 and presses the inclined surface of the bottom of the outer side of the limiting block 6, causing the limiting block 6 to move upward. After the limiting block 6 moves upward, the tongue plate 5 rotates past the bottom of the limiting block 6 and enters the through groove 4, and is then blocked by the stop block 16 to complete the positioning. At this time, the limiting block 6 falls and resets under the action of gravity. Then rotate the limiting ring 8 so that the limiting groove 9 on the outer side of the limiting ring 8 and the limiting rod 10 reset. At this time, the limiting rod 10 fits with the top of the limiting ring 8 and restricts the limiting ring 8 so that it cannot move upward. At this time, the limiting block 6 cannot move upward, and the tongue plate 5 cannot rotate outward and slide out. At this time, the tongue plate 5 will be blocked by the suspension rope or the ring when it rotates inward. At this time, the tongue plate 5 can achieve the anti-detachment restriction of the suspension rope and the ring.

[0031] When the hoisting operation is completed and the hoisting rope or ring needs to be removed, the limiting ring 8 is rotated so that the limiting groove 9 on its outer side rotates below the limiting rod 10. At this time, the limiting ring 8 can move upward. Pulling the hoisting rope or ring upward will cause the hoisting rope or ring to move upward toward the hook body 2 and squeeze the tongue plate 5. The tongue plate 5 is squeezed and flips upward, squeezing the inclined surface on the inner side of the limiting block 6, causing the limiting block 6 to move upward. At this time, the tongue plate 5 can flip to the outside of the hook body 2 to release the limitation on the hoisting rope or ring. At this time, the hoisting rope or ring can be removed from the hook body 2.

[0032] 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 hook anti-drop device, comprising a hook seat (1) and a hook body (2) installed below the hook seat (1), characterized in that: The top end of the hook body (2) is fixedly provided with a connecting rod (3), and the connecting rod (3) is rotatably arranged at the bottom end of the hook base (1), a through groove (4) is arranged at the middle part of the hook body (2), a tongue plate (5) is rotatably arranged in the through groove (4), a limiting block (6) is slidably arranged at the top end of the through groove (4), the two sides of the limiting block (6) are both arranged as inclined structures, a sliding ring (7) is fixedly arranged at the top end of the limiting block (6), and the sliding ring (7) is slidably arranged at the outer top end of the hook body (2), a limiting ring (8) is rotatably arranged at the top end of the sliding ring (7) through a bearing, two limiting grooves (9) are symmetrically arranged at the top end of the outer side wall of the limiting ring (8), two limiting rods (10) are fixedly arranged at the top end of the outer side wall of the hook body (2) and matched with the limiting grooves (9), two groups of positioning grooves (11) are symmetrically arranged at the top end of the outer side wall of the hook body (2), and each group of positioning grooves (11) is provided with two, two positioning blocks (12) are fixedly arranged at the inner side wall of the limiting ring (8) and matched with the two positioning grooves (11).

2. A load hook anti-drop device according to claim 1, characterised in that: The positioning block (12) and the positioning groove (11) are both arranged as semicircular structures, and the positioning block (12) is arranged as a deformable rubber block.

3. A load hook anti-drop device according to claim 1, characterised in that: A fixing seat (13) is fixedly arranged at the top end of the outer side wall of the hook body (2) and located at the slot opening of the through groove (4), a movable block (14) is rotatably arranged in the fixing seat (13) through a pin shaft, and a torsional spring (15) is arranged between the movable block (14) and the fixing seat (13).

4. A load hook anti-drop device according to claim 3, characterised in that: A stop block (16) is fixedly arranged at the bottom end of the movable block (14), the stop block (16) is arranged in the through groove (4) and arranged as an arc-shaped structure matched with the tongue plate (5).

5. A load hook anti-drop device according to claim 1, characterised in that: A plurality of reinforcing rods (17) are fixedly arranged in the through groove (4) and arranged in a staggered manner with the rotation track of the tongue plate (5).

6. A load hook anti-drop device according to claim 1, characterised in that: A matching plate (18) is fixedly arranged at the top end of the hook body (2) and rotatably arranged below the hook base (1).

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