Anti-dropping lifting hook of crane
By setting an anti-disengagement mechanism and a limiting mechanism outside the crane hook, the problem of large space occupation and loose fastening bolts in the prior art is solved, and higher utilization and safety of use space are achieved.
Patent Information
- Application Number
- CN202421332916.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The anti-detachment device of existing crane hooks occupies a large space, and the fastening bolts are prone to loosening, resulting in unstable hooks and increasing the risk of accidents.
A crane anti-detachment hook is designed. By setting an anti-detachment mechanism and a limiting mechanism outside the hook body, the lifting rope is prevented from slipping and disengaging, and the fastening bolts are fixed through the limiting mechanism to avoid loosening.
It increases the use space inside the hook, improves the fixing stability of the hoisting rope, avoids loosening of the fastening bolts, extends the service life, and improves safety.
Smart Images
Figure CN222454299U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cranes, in particular to an anti-drop hook for cranes. Background Art
[0002] A crane refers to a multi-action lifting machinery that can vertically lift and horizontally move heavy objects within a certain range. It is also called a crane. Cranes are frequently used machinery in factory workshops and play an important role in many fields. The lifting hook is a key part of the crane. Most of the anti-unhooking devices of the crane hook are made of steel plates in a duck-tongue shape. The duck-tongue steel plate is fixed to the neck of the hook using spring clips and thin screws. When in use, the rigging can be directly put on the hook.
[0003] The anti-dropping device currently commonly used in hooks is a torsion spring baffle type, which completely relies on the elastic force of the spring to press the baffle to prevent the sling from falling off. Under the action of the spring elastic force, the anti-dropping device forms a close connection with the hook to prevent the rigging from running out during use. However, during use, due to the structural form of the baffle inside the hook and the large lateral width, the use space inside the hook is reduced, which makes the disassembly and assembly of the lifting rope more restricted. During use, due to the reduction in effective space utilization, the hook baffle undergoes varying degrees of deformation, reducing its service life. In addition, when the wire rope comes out, the operator needs to use his thumb to press the steel plate and take the rigging out of the hook mouth. If the hook is relatively large, the hook will not be easily damaged. The corresponding anti-unhooking device is also relatively large. When the operator removes the rigging from the hook, it is quite laborious to press the anti-unhooking device. In the work, it is often encountered that the anti-unhooking device of the crane hook is inconvenient to use and easy to be damaged, and the rigging is easy to press the fingers when it is taken out from the hook. Some existing hooks are fastened by bolts during installation, and during the lifting work, the bolts are prone to loosening due to long-term stress. If the fastening bolts are loose, during the lifting and falling process, if the lifted weight encounters a collision and tilts or rotates, the hook may be separated from the supporting frame, which will cause the goods to fall, causing mechanical or personal injury accidents, and the safety is low, affecting safe production. Utility Model Content
[0004] The utility model aims to provide a crane anti-drop hook to solve the problems raised in the above background technology.
[0005] To achieve the above purpose, the utility model provides the following technical solutions: a crane anti-drop hook, including a support frame and a pulley rotating above the support frame, and also including:
[0006] A hook body movable at the bottom of the support frame, the bottom of the inner wall of the support frame is rotatably connected with a fastening bolt, one side of the top of the hook body is hinged with a positioning shell, and an anti-slip mechanism is arranged inside the positioning shell;
[0007] The movable grooves are provided on both sides of the positioning shell, and the movable blocks are slidably connected inside the movable grooves. The lower parts of both sides of the support frame are fixedly connected with positioning blocks, and a limiting mechanism is provided below the outer side of the support frame.
[0008] Preferably, the anti-slip mechanism includes a tension spring fixed to one side of the inner wall of the positioning shell and a connecting block fixed to one end of the tension spring, one side of the opening of the connecting block is fixedly connected to a limiting rod, and one side of the hook body of the hook body is provided with a limiting groove.
[0009] Preferably, the limiting mechanism includes a bidirectional threaded rod rotating inside a positioning block on one side and clamps threaded on both sides of the surface of the bidirectional threaded rod, one side of the clamp is slidably connected to a sliding rod, and one end of the bidirectional threaded rod is fixedly connected to a rotating part.
[0010] Preferably, the connecting block is U-shaped, and two sides of the connecting block are respectively fixedly connected to the moving blocks on both sides, and the connecting block is slidably connected to the inner wall of the positioning shell.
[0011] Preferably, the limiting groove is U-shaped, and the inner wall of the limiting groove is movably connected to the limiting rod.
[0012] Preferably, the sliding rod is fixedly connected to the positioning block on the other side, and the positions of the sliding rod and the bidirectional threaded rod are symmetrical.
[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0014] The utility model discloses a hook body is provided with an anti-slip mechanism, and the hook mouth of the hook body is locked, and the lifting rope is fixed, so as to prevent the lifting rope from slipping out of the hook body and causing the goods to fall, thereby improving the safety of use. By arranging the anti-slip device on the outside of the hook body, the occupation of the internal use space of the hook is reduced, and the use space inside the hook body is increased, and it can be adapted to the installation of lifting ropes of various thicknesses, thereby improving the applicability. The fastening bolt is limited and fixed by the limiting mechanism, so as to prevent the fastening bolt from loosening due to long-term use. The utility model is easy to operate and install, and the stability of the fixing of the fastening bolt is improved, thereby solving the problem that some current anti-slip hooks have small internal use space and the fastening bolts are easy to loosen when in use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the anti-slip mechanism of the utility model after closing;
[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the positioning shell in the utility model;
[0018] Figure 4 It is a structural schematic diagram of the limiting mechanism in the utility model.
[0019] In the figure: 1. support frame; 2. pulley; 3. hook body; 4. fastening bolt; 5. positioning shell; 6. anti-slip mechanism; 61. tension spring; 62. connecting block; 63. limit rod; 64. limit groove; 7. moving groove; 8. moving block; 9. positioning block; 10. limit mechanism; 101. bidirectional threaded rod; 102. splint; 103. slide rod; 104. rotating part. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-4As shown, a crane anti-drop hook comprises a support frame 1, the support frame 1 is in a U-shaped configuration, the support frame 1 is used to install parts, a pulley 2 is rotatably connected to the upper part of the inner wall of the support frame 1, the pulley 2 is used to guide the lifting rope when the crane is lifting, the bottom of the support frame 1 is movably connected to a hook body 3, the hook body 3 is used to connect the lifting rope with the cargo, the hook body 3 is detachable, the bottom of the inner wall of the support frame 1 is rotatably connected to a fastening bolt 4, the fastening bolt 4 and the hook body 3 are fastened The top of the hook body 3 is threadedly connected, and the fastening bolt 4 is used to fix the hook body 3, so that the hook body 3 is connected to the support frame 1 and the pulley 2 as a whole, which is convenient for the hook body 3 to be used in conjunction with the pulley 2. A positioning shell 5 is hinged on one side of the top of the hook body 3. The positioning shell 5 is located on one side of the opening of the hook body 3. The positioning shell 5 is used to install parts. An anti-slip mechanism 6 is arranged inside the positioning shell 5. The anti-slip mechanism 6 is used in conjunction with the hook body 3. The anti-slip mechanism 6 is used to limit the opening of the hook body 3 to avoid the hook mouth The inner hoisting rope comes out of the hook mouth, which plays an anti-slip effect. The operation is simple and labor-saving. Moving grooves 7 are provided on both sides of the inner wall of the positioning shell 5. The moving grooves 7 are symmetrically arranged. The moving grooves 7 are used to limit the moving area of the internal parts and can guide the internal parts. The internal sliding connection of the moving groove 7 is provided with a moving block 8. The moving block 8 is used in conjunction with the moving groove 7. The moving block 8 is fixedly connected to the parts of the anti-slip mechanism 6. The moving block 8 cooperates with the moving groove 7 to guide and limit the parts of the anti-slip mechanism 6, so that the parts move more smoothly and prevent the parts from escaping from the interior of the positioning shell 5. Positioning blocks 9 are fixedly connected to the lower parts of the two sides of the support frame 1. The positioning blocks 9 are symmetrically arranged. The positioning blocks 9 are used to position the parts. A limiting mechanism 10 is arranged at the lower part of the outer side of the support frame 1. The limiting mechanism 10 is used to limit the fastening bolts 4 to avoid the loosening of the fastening bolts 4 due to long use time, which affects the stability of the hook body 3 during hoisting, prolongs the service life of the device, and improves the safety of the device when used.
[0022] The anti-slip mechanism 6 includes a tension spring 61 fixed to one side of the inner wall of the positioning shell 5. There are two tension springs 61, which evenly distribute the force and improve the use effect. One end of the tension spring 61 is fixedly connected to a connecting block 62. The connecting block 62 is U-shaped. The two sides of the connecting block 62 are respectively fixedly connected to the moving blocks 8 on both sides. The connecting block 62 is slidably connected to the inner wall of the positioning shell 5. The size of the U-shaped opening on the surface of the connecting block 62 is larger than the size of one side of the hook body of the hook body 3. One side of the opening of the connecting block 62 is fixedly connected to a limiting rod 63. The limiting rod 63 is cylindrical in design. The limiting rod 63 is located at the positioning shell 5. On the outside, a limiting groove 64 is provided on one side of the hook body of the hook body 3. The limiting groove 64 is U-shaped, and the inner wall of the limiting groove 64 is movably connected to the surface of the limiting rod 63. After the lifting rope is installed in the hook mouth of the hook body 3, under the action of the elastic force of the tension spring 61 itself, the limiting rod 63 is pulled to one side, and the positioning shell 5 is rotated downward to make the limiting rod 63 correspond to the position of the limiting groove 64, and the limiting rod 63 is embedded in the inside of the limiting groove 64, so as to block the hook mouth position of the hook body 3, and can close the hook opening when lifting heavy objects on the hook to prevent the heavy objects from falling off, thereby improving the stability of the crane during lifting.
[0023] The limiting mechanism 10 includes a two-way threaded rod 101 that rotates inside a positioning block 9 on one side, the two-way threaded rod 101 is located at the bottom of one side of the support frame 1, and both sides of the surface of the two-way threaded rod 101 are threadedly connected with clamping plates 102, the clamping plates 102 are movably connected to the fastening bolts 4, the clamping plates 102 are symmetrically arranged, one side of the clamping plate 102 is slidably connected with a sliding rod 103, the sliding rod 103 is fixedly connected to the positioning block 9 on the other side, the position of the sliding rod 103 and the two-way threaded rod 101 are symmetrical, the sliding rod 103 is located at the bottom of the other side of the support frame 1, one end of the two-way threaded rod 101 is fixedly connected with a rotating member 104, and when the two-way threaded rod 101 is tightened, the rotating member 104 is fixedly connected to the two-way threaded rod 101. After the hook body 3 is tightened with the fixing bolt 4, the rotating part 104 is rotated to control the two-way threaded rod 101 to rotate, thereby driving the clamping plates 102 on both sides to move inward synchronously to limit the two sides of the fixing bolt 4. While the clamping plate 102 moves, it is guided by the sliding rod 103 to improve the stability of the movement. Similarly, when disassembling and assembling the fixing bolt 4, the rotating part 104 can be rotated in the opposite direction to release the limit on the fixing bolt 4. By fixing the fixing bolt 4, the fixing bolt 4 can be prevented from loosening during use, which may cause the hook body 3 to be unstable, thereby extending the service life of the hook body 3 and improving the safety during the lifting process.
[0024] Working principle: First, when installing the hook body 3, tighten it with the fastening bolt 4. After tightening, rotate the rotating part 104 to one side to control the two-way threaded rod 101 to rotate, driving the clamping plates 102 on both sides to move inward synchronously to clamp and limit the fastening bolts 4, so as to prevent the fastening bolts 4 from loosening due to long-term force during use. When using the hook body 3 for lifting, after the lifting rope is sleeved inside the hook mouth of the hook body 3, stretch the limiting rod 63 to one side and rotate the positioning shell 5 downward, and sleeve the limiting rod 63 inside the limiting groove 64, so as to block the hook mouth of the hook body 3 to prevent the lifting rope from falling off, and then carry out the lifting work. When the lifting is completed and the lifting rope is disassembled, pull the limiting rod 63 to one side to disengage it from the limiting groove 64 to release the blockage at the hook mouth of the hook body 3, and then take out the lifting rope.
[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A crane anti-drop hook, comprising a support frame (1) and a pulley (2) rotating on the upper part of the support frame (1), characterized in that: Also includes: A hook body (3) is movable at the bottom of the support frame (1), a fastening bolt (4) is rotatably connected to the bottom of the inner wall of the support frame (1), a positioning shell (5) is hingedly connected to one side of the top of the hook body (3), and an anti-slip mechanism (6) is arranged inside the positioning shell (5); Moving grooves (7) are provided on both sides of the interior of the positioning shell (5), and moving blocks (8) are slidably connected inside the moving grooves (7). Positioning blocks (9) are fixedly connected below both sides of the support frame (1), and a limiting mechanism (10) is provided below the outer side of the support frame (1).
2. The anti-drop hook for a crane according to claim 1, characterized in that: The anti-slip mechanism (6) comprises a tension spring (61) fixed to one side of the inner wall of the positioning shell (5) and a connecting block (62) fixed to one end of the tension spring (61); one side of the opening of the connecting block (62) is fixedly connected to a limiting rod (63); and one side of the hook body of the hook body (3) is provided with a limiting groove (64).
3. The anti-drop hook for crane according to claim 1, characterized in that: The limiting mechanism (10) comprises a bidirectional threaded rod (101) rotating inside a positioning block (9) on one side and clamping plates (102) threaded on both sides of the surface of the bidirectional threaded rod (101); one side of the clamping plate (102) is slidably connected to a sliding rod (103); and one end of the bidirectional threaded rod (101) is fixedly connected to a rotating member (104).
4. The anti-drop hook for a crane according to claim 2, characterized in that: The connecting block (62) is of U-shaped design, and two surfaces of the connecting block (62) are respectively fixedly connected to the moving blocks (8) on both sides, and the connecting block (62) is slidably connected to the inner wall of the positioning shell (5).
5. The anti-drop hook for crane according to claim 2, characterized in that: The limiting groove (64) is of U-shaped design, and the inner wall of the limiting groove (64) is movably connected to the limiting rod (63).
6. The anti-drop hook for crane according to claim 3, characterized in that: The sliding rod (103) is fixedly connected to the positioning block (9) on the other side, and the positions of the sliding rod (103) and the bidirectional threaded rod (101) are symmetrical.