Anti-falling type lifting hook structure of crane

Abstract

The invention relates to the technical field of crane accessories, and particularly discloses an anti-falling type lifting hook structure of a crane, the top of a connecting frame is rotatably connected with a rotating shaft, the side face of the rotating shaft is fixedly connected with a fixing plate, the side face of the connecting frame is fixedly connected with a hook ring, and the inner side of the hook ring is slidably connected with a contact part; the side face of the positioning part is in sliding connection with the inner side of the connecting frame. According to the anti-falling type lifting hook structure of the crane, the positioning component comprises the receding groove and the sliding groove, the receding groove is formed in the middle of the connecting frame, the anti-falling type lifting hook structure of the crane is provided with the resisting mechanism, the resisting frame physically blocks the opening of the shackle after returning to the original position, and a steel wire rope is prevented from accidentally falling off from the opening; the arc plates on the side faces can be tightly attached to the steel wire rope under the action of the second springs, secondary protection is formed, the unhooking risk is remarkably reduced through a double-protection mechanism, and the safety of hoisting operation is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of crane accessories, in particular to an anti-falling hook structure for a crane. Background Art

[0002] A crane refers to a multi-action lifting machinery that vertically lifts and horizontally transports heavy objects within a certain range. It is also called an overhead crane, overhead crane, or crane. When a crane lifts goods, a hook structure is used. The hook structure is mainly used to carry and lift goods. Its functions are mainly divided into carrying goods, lifting goods, and lowering goods. The principle that the hook in the crane can carry and lift goods is to utilize the gravity of the heavy object itself and the structural design of the crossbeam (flower basket) at the bottom of the hook. The bottom of the hook in the crane is a hook-shaped structure, which forms a balance point under the action of the heavy object. When lifting goods, the crane lowers the height of the suspension hook, so that the goods interact with the lifting system composed of wire ropes and other components through the gravity and local pressure of the hook to complete the lifting operation.

[0003] When the wire rope is being hoisted by the anti-falling mechanism on the existing hook, if the wire rope slides on the inside of the hook, it is easy to cause squeezing and collision on the anti-falling mechanism, and then the anti-falling mechanism and the hook become loose, thereby posing a safety hazard during the hoisting operation. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A crane anti-falling hook structure, comprising: A connecting frame, wherein the top of the connecting frame is rotatably connected to a rotating shaft, the side of the rotating shaft is fixedly connected to a fixing plate, the side of the connecting frame is fixedly connected to a hook ring, and the inner side of the hook ring is slidably connected to a contact component; A positioning component, which is used to protect the hook and loop from falling off, and the side surface of the positioning component is slidably connected to the inner side of the connecting frame; The positioning component includes a clearance groove and a sliding groove, the clearance groove is opened in the middle of the connecting frame, the sliding groove is opened on the side of the connecting frame, and the sliding grooves are arranged on both sides of the clearance groove, the side of the connecting frame away from the sliding groove is fixedly connected to the buffer mechanism, and the inner side of the buffer mechanism is slidably connected to the blocking mechanism; During the hoisting operation, the steel wire rope is placed on the shackle, and the resisting mechanism is squeezed by the steel wire rope to slide and shift in the give way groove, and the steel wire rope is accurately placed on the shackle. After the steel wire rope is in place, the resisting mechanism is driven to reset through the buffer mechanism, and the resisting mechanism is used to form a blocking limit for the steel wire rope on the shackle to prevent the steel wire rope from falling off the shackle during the hoisting process, ensuring the safe and stable hoisting operation. The top of the circular plate is fixedly connected to the circular rod, and one end of the circular rod is away from the circular plate and is slidably connected to the inner side of the circular rod. The circular rod is fixedly provided with a second spring, and the top of the second spring is fixedly connected to the side of the circular rod close to the circular rod, and the bottom of the second spring is fixedly connected to the side of the circular plate close to the circular rod. Preferably, when the wire rope is placed, the retaining frame is squeezed by the wire rope, and the retaining frame slides in the buffer groove through the round rod, and at the same time squeezes the first spring. The sliding of the round rod drives the retaining frame to move away from the shackle, so that the retaining frame is separated from the inner side of the shackle, thereby creating conditions for the wire rope to be placed in the shackle, reducing time waste and potential safety hazards caused by installation difficulties, thereby reducing the phenomenon of manual movement of the retaining frame and increasing the practicality of the device; Preferably, during the placement operation of the wire rope, when the wire rope contacts the retaining frame, its own gravity and the placement force squeeze the retaining frame, and the retaining frame drives the round rod to slide in the buffer groove, synchronously squeezing the first spring, and the sliding of the round rod further pushes the retaining frame to move away from the shackle, so that it quickly separates from the inner side of the shackle, making room for the wire rope to smoothly fall into the shackle; Preferably, the tedious steps of the traditional manual toggle of the retaining frame are completely abandoned, thus avoiding the time waste caused by manual operation errors or installation difficulties, making the wire rope placement process smoother and more efficient, and greatly shortening the operation preparation time; reducing the direct contact between manual labor and moving parts, avoiding accidental injuries such as pinching hands and collisions that may occur during manual operation, and ensuring the personal safety of operators; enhancing the practicality of the device, through the adaptive mechanical structure, it can adapt to the placement requirements of wire ropes of different thicknesses and weights without manual intervention, expanding the scope of application of the device, and effectively improving the versatility and reliability of the equipment under complex working conditions; When the wire rope needs to be placed on the shackle, the first spring returns to its original position and pulls the round rod, which drives the blocking frame to resist the inner side of the shackle. At this time, the blocking frame can effectively resist the opening of the shackle. At the same time, the arc plate connected to the side of the blocking frame will be tightly pressed against the wire rope on the shackle under the pull of the second spring, which can prevent the wire rope from slipping and unhooking, thereby improving the safety of the lifting work, reducing the risk of equipment damage and casualties caused by unhooking of the wire rope, and ensuring the smooth progress of the lifting operation and the safety of personnel and equipment. Preferably, the buffer mechanism includes a buffer groove, the buffer groove is opened on the side of the connecting frame, a sliding shaft is fixedly connected to the inner side of the buffer groove, a first spring is sleeved on the sliding shaft, one end of the first spring is fixedly connected to the side of the round rod, and the other end of the first spring is fixedly connected to the inner wall of the buffer groove; Preferably, during the wire rope unloading operation, after pulling the connecting shaft, it will drive the pushing frame to move in the sliding groove. At the same time, the pushing frame makes the blocking frame separate from the inner side of the hook ring through the round rod. During this process, the blocking frame will also drive the arc plate to move in the giving groove, avoiding interference between the blocking frame, the arc plate and the wire rope during the wire rope unloading process, thereby ensuring that the unloading work can be carried out smoothly and efficiently, avoiding the occurrence of unloading jams or even damage to the equipment due to interference, reducing obstacles in the operation, greatly improving the smoothness and safety of the unloading operation, reducing the maintenance cost and time loss caused by interference problems, and providing reliable protection for the wire rope unloading work; Preferably, the contact component includes a notch, the notch is opened in the middle of the hook ring, and the inner side of the notch is slidably connected to a moving mechanism; During hoisting operations, after placing the wire rope on the shackle, when the wire rope slips and shakes on the shackle, the moving mechanism will contact the wire rope and slide inside the slot. During this process, the moving mechanism can effectively absorb the impact force generated by the shaking of the wire rope, acting as a buffer for the shaking wire rope, thereby reducing the wear between the wire rope and the shackle due to severe shaking, reducing the risk of wire rope unhooking, and ensuring the safety and stability of the hoisting operation; Preferably, the moving mechanism includes a moving block and a connecting rod, both ends of the connecting rod are fixedly connected to the inner side of the notch, the connecting rod is slidably connected to the moving block, the bottom of the moving block is fixedly connected to the moving plate, the side surface of the moving plate is slidably connected to the inner side of the notch, the top of the moving block is fixedly connected to a pad, the bottom of the pad is slidably connected to the inner side of the hook ring, the top of the pad is fixedly connected to a rubber strip, a third spring is sleeved on the connecting rod, one end of the third spring is fixedly connected to the side surface of the moving block, and the other end of the third spring is fixedly connected to the inner wall of the notch; Preferably, when the wire rope is placed on the shackle, the wire rope is placed directly on the pad, and the rubber strips evenly distributed on the top of the pad significantly increase the friction between the wire rope and the pad by increasing the surface roughness, thereby preventing the wire rope from sliding easily on the shackle; Preferably, once the wire rope shows a sliding tendency, the pad will be subjected to the force generated by the movement of the wire rope. At this time, the pad drives the moving block to slide on the connecting rod, and at the same time the moving plate moves inside the slot and squeezes the third spring. The third spring absorbs the moving force of the wire rope through elastic deformation, and converts the kinetic energy generated by it into elastic potential energy, thereby reducing the sliding force of the wire rope, preventing the wire rope from falling off due to sliding on the hook ring, improving the safety of the lifting operation, reducing the risk of equipment damage and personal injury caused by the falling of the wire rope, and reducing the abnormal wear of the wire rope and the hook ring.

[0005] The present invention provides a crane anti-drop hook structure, which has the following beneficial effects: 1. The anti-fall hook structure of the crane is provided with a positioning component. When performing lifting operations, the wire rope is placed on the hook ring, and the resisting mechanism is squeezed by the wire rope to make it slide and shift in the makeshift groove, and the wire rope is accurately placed on the hook ring. After the wire rope is in place, the resisting mechanism is driven to reset through the buffer mechanism, and the resisting mechanism is used to form a blocking limit for the wire rope on the hook ring to prevent the wire rope from falling off the hook ring during the lifting process, thereby ensuring safe and stable lifting operations.

[0006] 2. The crane's anti-fall hook structure is equipped with a resisting mechanism. After the resisting frame returns to its position, it forms a physical barrier to the hook ring opening to prevent the wire rope from accidentally falling out of the opening; the arc plate on the side can fit tightly against the wire rope under the action of the second spring to form a secondary protection. The double protection mechanism significantly reduces the risk of unhooking, effectively ensures the safety of lifting operations, and avoids equipment damage or safety accidents caused by the falling wire rope.

[0007] 3. The anti-fall hook structure of the crane is equipped with a buffer mechanism, which allows for quick and convenient blocking structure shifting operations, significantly reducing the preparation time before unloading and the adjustment time during unloading. Avoiding interference can effectively prevent the wire rope from wear and deformation due to obstruction, thereby extending the service life of the wire rope.

[0008] 4. The anti-detachment hook structure of the crane is provided with a moving mechanism. The rubber strip on the top of the backing plate significantly increases the friction force with the steel wire rope, making it difficult for the steel wire rope to slide relatively after being placed on the hook ring. The backing plate can slide inside the hook ring, and together with the linkage structure of the moving block, moving plate and spring, it can adjust adaptively according to the actual sliding situation of the steel wire rope. No matter how the direction and force of the steel wire rope sliding change, this structure can respond in a timely manner and provide corresponding resistance and buffering, which is more flexible and reliable than the fixed structure and improves the adaptability of the hook to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of the anti-detachment hook structure of the crane of the present invention; Figure 2 is a schematic structural diagram of the connecting frame of the present invention; Figure 3 is a schematic structural diagram of the positioning component of the present invention; Figure 4 is a schematic structural diagram of the sliding groove of the present invention; Figure 5 is a schematic structural diagram of the resisting mechanism of the present invention; Figure 6 of the present invention Figure 4 is a schematic structural diagram of the part A in; Figure 7 is a schematic structural diagram of the contact component of the present invention; Figure 8 is a schematic structural diagram of the moving mechanism of the present invention.

[0010] In the figure: 1, connecting frame; 2, hook ring; 3, fixing plate; 4, rotating shaft; 5, positioning component; 51, relief groove; 52, sliding groove; 53, buffering mechanism; 531, buffering groove; 532, sliding shaft; 533, first spring; 54, resisting mechanism; 541, pushing frame; 542, connecting shaft; 543, round rod; 544, round hole; 545, resisting frame; 546, arc plate; 547, arc rod; 548, second spring; 6, contact component; 61, notch; 62, moving mechanism; 621, moving block; 622, moving plate; 623, backing plate; 624, rubber strip; 625, connecting rod; 626, third spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0012] See also Figure 1 - Figure 2 The present invention provides a technical solution: a crane anti-falling hook structure, comprising: A connecting frame 1, the top of the connecting frame 1 is rotatably connected to a rotating shaft 4, a side of the rotating shaft 4 is fixedly connected to a fixing plate 3, a side of the connecting frame 1 is fixedly connected to a hook ring 2, and the inner side of the hook ring 2 is slidably connected to a contact component 6; A positioning component 5 is used to prevent the hook and loop 2 from falling off, and the side surface of the positioning component 5 is slidably connected to the inner side of the connecting frame 1; See also Figure 1 - Figure 4 The positioning component 5 includes a clearance groove 51 and a sliding groove 52. The clearance groove 51 is opened in the middle of the connecting frame 1, and the sliding groove 52 is opened on the side of the connecting frame 1. The sliding grooves 52 are arranged on both sides of the clearance groove 51. A buffer mechanism 53 is fixedly connected to the side of the connecting frame 1 away from the sliding groove 52. A resisting mechanism 54 is slidably connected to the inner side of the buffer mechanism 53. During the hoisting operation, the steel wire rope is placed on the shackle 2, and the resisting mechanism 54 is squeezed by the steel wire rope, so that it slides and shifts in the clearance groove 51, and the steel wire rope is accurately placed on the shackle 2. After the steel wire rope is in place, the resisting mechanism 54 is driven to reset through the buffer mechanism 53, and the resisting mechanism 54 is used to form a blocking limit for the steel wire rope on the shackle 2, preventing the steel wire rope from falling off the shackle 2 during the hoisting process, thereby ensuring the safe and stable hoisting operation. See also Figure 1 - Figure 5 The resisting mechanism 54 includes a connecting shaft 542, both ends of which are fixedly connected to a pushing frame 541, the side of the pushing frame 541 is slidably connected to the inner side of the sliding groove 52, and the side of the pushing frame 541 away from the connecting shaft 542 is fixedly connected to a round rod 543, the side of the round rod 543 is slidably connected to the inner side of the buffer groove 531, and a round hole 544 is opened in the middle of the side of the round rod 543, the inner side of the round hole 544 is slidably connected to the side of the sliding shaft 532, and the side of the round rod 543 is rotatably connected to a resisting frame 545, and the inner side of the resisting frame 545 is slidably connected to both sides of the connecting frame 1. The side of the resisting frame 545 close to the pushing frame 541 is rotatably connected to the arc plate 546, and the side of the arc plate 546 away from the resisting frame 545 contacts the inner side of the yield groove 51. The top of the arc plate 546 is fixedly connected to the arc rod 547. The end of the arc rod 547 away from the arc plate 546 is slidably connected to the inner side of the resisting frame 545. A second spring 548 is sleeved on the arc rod 547. The top of the second spring 548 is fixedly connected to the side of the resisting frame 545 close to the arc rod 547, and the bottom of the second spring 548 is fixedly connected to the side of the arc plate 546 close to the arc rod 547. When the wire rope is placed, the retaining frame 545 is squeezed by the wire rope, and the retaining frame 545 slides in the buffer groove 531 through the round rod 543, and at the same time squeezes the first spring 533. The sliding of the round rod 543 drives the retaining frame 545 to move away from the hook ring 2, so that the retaining frame 545 is separated from the inner side of the hook ring 2, thereby creating conditions for the wire rope to be placed in the hook ring 2, reducing the time waste and potential safety hazards caused by installation difficulties, thereby reducing the phenomenon of manually moving the retaining frame 545, and increasing the practicality of the device; During the placement operation of the wire rope, when the wire rope contacts the retaining frame 545, its own gravity and the placement force squeeze the retaining frame 545, and the retaining frame 545 drives the round rod 543 to slide in the buffer groove 531, and simultaneously squeezes the first spring 533. The sliding of the round rod 543 further pushes the retaining frame 545 away from the shackle 2, so that it quickly separates from the inner side of the shackle 2, making room for the wire rope to smoothly fall into the shackle 2; The tedious steps of manually adjusting the retaining frame 545 are completely eliminated, avoiding time wasted due to manual errors or installation difficulties, making the wire rope placement process smoother and more efficient, and significantly shortening job preparation time. Direct contact between humans and moving parts is reduced, avoiding accidental injuries such as hand pinching and collisions that may occur during manual operation, thereby ensuring the personal safety of operators. The practicality of the device is enhanced. Through its adaptive mechanical structure, it can adapt to the placement requirements of wire ropes of different thicknesses and weights without manual intervention, expanding the device's scope of application and effectively improving the versatility and reliability of the equipment under complex working conditions. When the wire rope is placed on the hook ring 2, the first spring 533 returns to its original position and pulls the round rod 543, which drives the blocking frame 545 to resist the inner side of the hook ring 2. At this time, the blocking frame 545 can effectively resist the opening of the hook ring 2. At the same time, the arc plate 546 connected to the side of the blocking frame 545 will be tightly pressed against the wire rope on the hook ring 2 under the pull of the second spring 548, which can prevent the wire rope from slipping and unhooking, thereby improving the safety of the lifting operation, reducing the risk of equipment damage and casualties caused by the unhooking of the wire rope, and ensuring the smooth progress of the lifting operation and the safety of personnel and equipment. See also Figure 1 - Figure 6 The buffer mechanism 53 includes a buffer groove 531, which is opened on the side of the connecting frame 1. A sliding shaft 532 is fixedly connected to the inner side of the buffer groove 531. A first spring 533 is sleeved on the sliding shaft 532. One end of the first spring 533 is fixedly connected to the side of the round rod 543, and the other end of the first spring 533 is fixedly connected to the inner wall of the buffer groove 531. During the wire rope cutting operation, after pulling the connecting shaft 542, it drives the pushing frame 541 to move within the sliding groove 52. At the same time, the pushing frame 541 causes the resisting frame 545 to disengage from the inner side of the hook ring 2 through the round rod 543. During this process, the resisting frame 545 also drives the arc plate 546 to move within the relief groove 51, preventing interference between the resisting frame 545, the arc plate 546, and the wire rope during the wire rope cutting process. This ensures that the cutting work can proceed smoothly and efficiently, avoiding situations such as cutting jams or even equipment damage caused by interference, reducing obstacles during the operation, significantly improving the fluency and safety of the cutting operation, reducing the maintenance costs and time losses caused by interference problems, and providing reliable guarantee for the wire rope cutting work; Please refer to Figure 1 - Figure 7 , the present invention provides a technical solution: the contact component 6 includes a notch 61, the notch 61 is opened in the middle of the hook ring 2, and a moving mechanism 62 is slidably connected to the inner side of the notch 61; During the hoisting operation, after placing the wire rope on the hook ring 2, when the wire rope slides and shakes on the hook ring 2, the moving mechanism 62 will abut against the wire rope and slide inside the notch 61. During this process, the moving mechanism 62 can effectively absorb the impact force generated by the shaking of the wire rope, play a buffering role for the shaking wire rope, thereby reducing the wear between the wire rope and the hook ring 2 caused by severe shaking, reducing the risk of wire rope unhooking, and ensuring the safety and stability of the hoisting operation; Please refer to Figure 1 - Figure 8 , the moving mechanism 62 includes a moving block 621 and a connecting rod 625. Both ends of the connecting rod 625 are fixedly connected to the inner side of the notch 61. The moving block 621 is slidably connected to the connecting rod 625. A moving plate 622 is fixedly connected to the bottom of the moving block 621. The side surface of the moving plate 622 is slidably connected to the inner side of the notch 61. A backing plate 623 is fixedly connected to the top of the moving block 621. The bottom of the backing plate 623 is slidably connected to the inner side of the hook ring 2. A rubber strip 624 is fixedly connected to the top of the backing plate 623. A third spring 626 is sleeved on the connecting rod 625. One end of the third spring 626 is fixedly connected to the side surface of the moving block 621, and the other end of the third spring 626 is fixedly connected to the inner wall of the notch 61; When placing the wire rope on the hook ring 2, the wire rope is directly placed on the backing plate 623. The rubber strips 624 evenly distributed on the top of the backing plate 623 significantly increase the friction with the wire rope by increasing the surface roughness, preventing the wire rope from sliding easily on the hook ring 2; Once the wire rope shows a sliding tendency, the backing plate 623 will be subjected to the force generated by the movement of the wire rope. At this time, the backing plate 623 drives the moving block 621 to slide on the connecting rod 625. Meanwhile, the moving plate 622 moves inside the notch 61 and squeezes the third spring 626. The third spring 626 absorbs the moving force of the wire rope through elastic deformation, converts the kinetic energy generated by it into elastic potential energy, thereby reducing the sliding force of the wire rope, preventing the wire rope from falling off the hook ring 2 due to sliding, improving the safety of the hoisting operation, reducing the risks of equipment damage and personal injury caused by the wire rope falling off, and at the same time reducing the abnormal wear of the wire rope and the hook ring 2.

[0013] Specific working process: During the operation of controlling the wire rope of the crane, first, the connecting rope is sequentially passed through the preset holes on the fixing plate 3 to complete the basic threading; subsequently, the top of the rotating shaft 4 is accurately installed on the corresponding connecting part of the crane to ensure the stable connection of the rotating shaft 4. When the hook ring 2 starts to perform the wire rope hoisting operation, the wire rope is smoothly placed on the surface of the contact part 6 through the positioning part 5. Through the coordinated action of the positioning part 5 and the contact part 6, the effective positioning and support of the wire rope are realized, so as to smoothly carry out the hoisting work.

[0014] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art and related fields based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art without special instructions and limitations.

Claims

1. An anti-detachment hook structure for a crane, characterized in that, include: A connecting frame (1), wherein the top of the connecting frame (1) is rotatably connected to a rotating shaft (4), a side of the rotating shaft (4) is fixedly connected to a fixing plate (3), a side of the connecting frame (1) is fixedly connected to a hook ring (2), and an inner side of the hook ring (2) is slidably connected to a contact component (6); A positioning component (5), the positioning component (5) is used to protect the hook ring (2) from falling off, and the side surface of the positioning component (5) is slidably connected to the inner side of the connecting frame (1); The positioning component (5) includes a clearance groove (51) and a sliding groove (52), wherein the clearance groove (51) is provided in the middle of the connecting frame (1), and the sliding groove (52) is provided on the side of the connecting frame (1), and the sliding groove (52) is provided on both sides of the clearance groove (51), and a buffer mechanism (53) is fixedly connected to a side of the connecting frame (1) away from the sliding groove (52), and a resisting mechanism (54) is slidably connected to the inner side of the buffer mechanism (53).

2. The anti-dropping hook structure of a crane according to claim 1, characterized in that: The buffer mechanism (53) comprises a buffer groove (531), the buffer groove (531) being opened on the side of the connecting frame (1), a sliding shaft (532) being fixedly connected to the inner side of the buffer groove (531), and a first spring (533) being sleeved on the sliding shaft (532).

3. The anti-dropping hook structure of a crane according to claim 2, characterized in that: The resisting mechanism (54) comprises a connecting shaft (542), both ends of the connecting shaft (542) are fixedly connected to a pushing frame (541), a side of the pushing frame (541) away from the connecting shaft (542) is fixedly connected to a round rod (543), a round hole (544) is provided in the middle of the side of the round rod (543), the side of the round rod (543) is rotatably connected to a resisting frame (545), the side of the resisting frame (545) close to the pushing frame (541) is rotatably connected to an arc plate (546), the top of the arc plate (546) is fixedly connected to an arc rod (547), and a second spring (548) is sleeved on the arc rod (547).

4. The anti-detachment hook structure of a crane according to claim 3, characterized in that: The inner side of the circular hole (544) is slidably connected to the side of the sliding shaft (532), the side of the round rod (543) is slidably connected to the inner side of the buffer groove (531), one end of the first spring (533) is fixedly connected to the side of the round rod (543), and the other end of the first spring (533) is fixedly connected to the inner wall of the buffer groove (531).

5. The anti-dropping hook structure of a crane according to claim 4, characterized in that: The side of the pushing frame (541) is slidably connected to the inner side of the sliding groove (52), the inner side of the retaining frame (545) is slidably connected to both sides of the connecting frame (1), and the side of the arc plate (546) away from the retaining frame (545) contacts the inner side of the giving way groove (51).

6. The anti-detachment hook structure of a crane according to claim 5, characterized in that: The top of the second spring (548) is fixedly connected to the side of the retaining frame (545) close to the arc rod (547), the bottom of the second spring (548) is fixedly connected to the side of the arc plate (546) close to the arc rod (547), and the end of the arc rod (547) away from the arc plate (546) is slidably connected to the inner side of the retaining frame (545).

7. A structure of an anti-dropping hook for a crane according to claim 1, characterized in that: The contact component (6) includes a notch (61) which is opened in the middle of the hook ring (2), and a moving mechanism (62) is slidably connected to the inner side of the notch (61).

8. A structure of an anti-drop hook for a crane according to claim 7, characterized in that: The moving mechanism (62) includes a moving block (621) and a connecting rod (625). Both ends of the connecting rod (625) are fixedly connected to the inner side of the notch (61), and the moving block (621) is slidably connected to the connecting rod (625). A moving plate (622) is fixedly connected to the bottom of the moving block (621), a backing plate (623) is fixedly connected to the top of the moving block (621), a rubber strip (624) is fixedly connected to the top of the backing plate (623), and a third spring (626) is sleeved on the connecting rod (625).

9. The anti-dropping hook structure of a crane according to claim 8, characterized in that: The side surface of the moving plate (622) is slidably connected to the inner side of the notch (61). One end of the third spring (626) is fixedly connected to the side surface of the moving block (621), the other end of the third spring (626) is fixedly connected to the inner wall of the notch (61), and the bottom of the backing plate (623) is slidably connected to the inner side of the hook ring (2).

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