Self-locking lifting hook

Abstract

The invention belongs to the technical field of cranes, and particularly relates to a self-locking lifting hook which comprises a hook body, a pulley is rotationally connected into the hook body, and a steel wire rope is arranged on the outer wall of the pulley; one end of the steel wire rope is fixedly connected with a buckle, the other end of the steel wire rope is fixedly connected with a balancing weight, the interior of the balancing weight is rotationally connected with one end of a limiting rod, a first sliding groove is formed in the hook body, the outer wall of the other end of the limiting rod is slidably connected to the inner wall of the first sliding groove, and the outer wall of the buckle is fixedly connected with a limiting plate. A second sliding groove is formed in the hook body in a penetrating mode, the outer wall of the limiting plate is slidably connected into the second sliding groove, and a fixing assembly is arranged on the upper surface of the hook body. The problem that in the prior art, in the actual using process, it is not considered that in the prior art, in the actual using process, the arrangement of a locking plate is likely to hinder a hoisted object, and therefore the hoisted object is not convenient to hook in is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of cranes and relates to a self-locking lifting hook. Background Art

[0002] In industrial production and lifting and transportation, bridge cranes are an important tool and equipment, widely used in various fields, such as industrial and mining enterprises, steel and chemical industry, railway transportation, port terminals and logistics turnover, among which the hook is the main component of the lifting machinery, which plays the role of connecting the lifting machinery and the heavy objects. Therefore, the safety and reliability of the hook are very important to ensure the safe use of the lifting machinery. However, in the use of traditional hooks, there are some problems. First, the hook is easy to get off the rope, causing the heavy objects to fall, causing safety accidents and property losses. Secondly, the wire rope of the hook is easy to deflect, causing the heavy objects to swing and shake during the lifting process, affecting the stability and safety of the lifting. In addition, the hook may be twisted and deformed during use, exceeding the specified deformation angle, further affecting the safety performance of the hook. In order to solve these problems, a self-locking lifting hook came into being.

[0003] The patent with announcement number CN218809887U discloses a self-locking lifting hook, including a lifting buckle and a lifting hook, wherein a lifting hook is fixedly arranged at the bottom of the lifting buckle, a rotating shaft is penetrated above the lifting hook, a locking plate is fixedly arranged on the outer side of the rotating shaft, a sliding groove is opened on the side of the locking plate away from the hook opening, a sliding block is movably clamped in the sliding groove, a receiving groove is arranged on the lifting hook, a spring one is fixedly arranged in the receiving groove, a connecting plate is fixedly arranged on the other end of the spring one, and the other side of the connecting plate is hingedly arranged on the sliding block one, a moving plate is slidingly arranged inside the lifting hook, a spring two is arranged between the moving plate and the bottom of the lifting hook, a steel wire rope connected to the locking plate for driving the locking plate to move is arranged at the bottom of the lifting plate, and a resistance block is fixedly arranged at the bottom of the lifting hook, so as to realize unlocking and locking by the gravity of the lifting object itself, without human intervention, stable locking, preventing the object from being unhooked, and high safety performance. Although the application achieves the effect of locking and unlocking the hook through the cooperation of the wire rope and the locking plate, it does not take into account that in actual use, the setting of the locking plate may easily hinder the hoisted object, thereby causing the problem of inconvenience in hooking the hoisted object. Summary of the invention

[0004] In order to remedy the above deficiencies, the present invention provides a self-locking lifting hook, which aims to improve the problem that the prior art has not taken into account that in actual use, the setting of the locking plate is likely to hinder the hoisting object, thereby making it inconvenient to hook the hoisted object.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A self-locking lifting hook comprises a hook body, wherein the hook body is an L-shaped structure, and a protrusion is provided at the end of the horizontal part thereof to form a hook structure, and the surface of the protrusion is an inclined surface inclined toward the inner side of the hook; the top of the vertical part of the hook body is internally rotatably connected to a pulley, and a steel wire rope is wound around the pulley; the buckle is a C-shaped structure, located in the hook structure of the hook body, the outer end surface of the bottom of the buckle contacts the inner side surface of the protrusion of the hook body, and the end surface of the upper part of the buckle is an inclined surface, which cooperates with the inclined surface of the protrusion, and a closed structure is formed between the buckle and the hook body to achieve locking of the object to be hoisted; one end of the steel wire rope is located outside the hook body and is in contact with the upper surface of the buckle Fixedly connected, the other end of the wire rope is located inside the vertical part of the hook body and is fixedly connected with a counterweight block; the limit rod is located inside the vertical part of the hook body and is arranged horizontally; the interior of the counterweight block is rotatably connected to one end of the limit rod; a first slide groove is provided inside the vertical part of the hook body, and the outer wall of the other end of the limit rod is slidably connected to the inner wall of the first slide groove; the side wall of the buckle is fixedly connected to the limit plate, and a vertical second slide groove is penetrated on the side of the vertical part of the hook body close to the buckle, and the outer wall of the limit plate is slidably connected to the inside of the second slide groove; a fixing component is provided on the upper surface of the top of the hook body.

[0007] Furthermore, the fixing assembly comprises a connecting block, the lower surface of which is fixedly connected to the upper surface of the top of the hook body.

[0008] Furthermore, a universal coupling is provided inside the connecting block, the upper part of the universal coupling is located outside the connecting block, the top of the universal coupling is fixedly connected to a connecting seat, the upper surface of the connecting seat is fixedly connected to a slide plate, the upper surface of the slide plate is fixedly connected to a plurality of telescopic rods, and the outer wall of the telescopic rod is provided with a spring.

[0009] Furthermore, a shell is fixedly connected to the upper surface of the telescopic rod.

[0010] Furthermore, the tensile strength of the slide plate is greater than the tensile strength of the connecting seat.

[0011] Furthermore, the upper end of the spring is fixedly connected to the inside of the housing, and the lower end of the spring is fixedly connected to the upper surface of the slide plate.

[0012] Furthermore, the outer wall of the slide plate is slidably connected to the inside of the shell, and the lengths of multiple sides of the connecting seat are all smaller than the width of the slide plate.

[0013] Furthermore, the outer wall of the connecting seat is slidably connected to the inside of the shell.

[0014] Furthermore, a connecting ring is provided on the upper surface of the shell for connecting a crane.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, the hook body is raised by a crane, and the gravity of the object being lifted causes the buckle to slide downward until the inclined surface fits, thereby achieving the effect of locking the object. When the object being lifted is lowered, the gravity is borne by the ground, and the direction of the wire rope is changed by the pulley to pull the buckle up. The limit plate limits the buckle, thereby achieving the effect of unlocking the object being lifted, thereby improving the convenience and safety of the device.

[0017] 2. In the present invention, when the object to be hoisted is placed on the ground, a reaction force is generated on the hook body, thereby pushing the connecting block, and then driving the connecting seat and the slide plate through the universal coupling. The universal coupling can change the angle of the hook body, thereby achieving the effect of facilitating the placement of objects while allowing smooth thrust transmission. The slide plate compresses the telescopic rod and the spring, thereby achieving the effect of buffering the hook body and the object to be hoisted, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of a self-locking lifting hook of the present invention;

[0019] Figure 2 A cross-sectional view of a hook body of a self-locking lifting hook of the present invention;

[0020] Figure 3 The present invention is a structural diagram of a counterweight block of a self-locking lifting hook.

[0021] In the figure: 1. hook body; 2. pulley; 3. wire rope; 4. buckle; 5. counterweight; 6. limit rod; 7. first slide groove; 8. limit plate; 9. second slide groove; 10. connecting block; 11. universal coupling; 12. connecting seat; 13. slide plate; 14. telescopic rod; 15. spring; 16. housing. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0023] Reference Figure 1-3, an embodiment of the present invention is: a self-locking lifting hook, comprising a hook body 1, the hook body 1 is an L-shaped structure, and the end of its horizontal part is provided with a protrusion to form a hook structure, and the surface of the protrusion is an inclined surface inclined toward the inner side of the hook; the top of the vertical part of the hook body 1 is internally rotatably connected to a pulley 2, and a steel wire rope 3 is wound around the pulley 2; the buckle 4 is a C-shaped structure, located in the hook structure of the hook body 1, the outer end surface of the bottom of the buckle 4 is in contact with the inner side surface of the protrusion of the hook body 1, and the upper end surface of the buckle 4 is an inclined surface, which cooperates with the inclined surface of the protrusion, and a closed structure is formed between the buckle 4 and the hook body 1 to achieve locking of the object to be hoisted; one end of the steel wire rope 3 is located outside the hook body 1, and is in contact with the upper surface of the buckle 4. The hook body 1 is fixedly connected with the hook surface, the other end of the wire rope 3 is located inside the vertical part of the hook body 1, and is fixedly connected with a counterweight 5; the limit rod 6 is located inside the vertical part of the hook body 1 and is arranged horizontally; the interior of the counterweight 5 is rotatably connected to one end of the limit rod 6; a first slide groove 7 is opened inside the vertical part of the hook body 1, and the outer wall of the other end of the limit rod 6 is slidably connected to the inner wall of the first slide groove 7; the side wall of the buckle 4 is fixedly connected with a limit plate 8, and a vertical second slide groove 9 is penetrated through the side of the vertical part of the hook body 1 close to the buckle 4, and the outer wall of the limit plate 8 is slidably connected to the inside of the second slide groove 9; a fixing component is provided on the upper surface of the top of the hook body 1.

[0024] Specifically, the crane drives the hook body 1 to rise. At this time, the gravity of the object to be lifted will gradually be applied to the lower end of the buckle 4. This process is gradual, and the gravity gradually increases. As the gravity increases, the buckle 4 will be subjected to the pressure of the object to be lifted, thereby pulling the buckle 4 to slide downward. This process continues until the inclined surface of the buckle 4 is completely aligned with the inclined surface of the hook body 1. Once this state is reached, it is considered that the object to be lifted is locked. This locking method can effectively prevent the object to be lifted from accidentally falling off during the lifting process, thereby ensuring the safety of the operation. When it is necessary to put down the object to be lifted, after the object to be lifted contacts the ground, its gravity will be borne by the ground. In this case, the buckle 4 is no longer subjected to the pressure of the object to be lifted. At this time, the counterweight block 5 pulls the buckle 4 up through the wire rope 3. In this process, the pulley 2 will change the direction of the wire rope 3, so that the buckle 4 drives the limiting plate 8 to rise along the second slide groove 9. This process plays a role in limiting the sliding of the buckle 4, thereby realizing the unlocking of the hook.

[0025] Reference Figure 1 and Figure 2 The fixing assembly includes a connecting block 10, the lower surface of which is fixedly connected to the upper surface of the hook body 1; a universal coupling 11 is arranged inside the connecting block 10, the upper surface of the universal coupling 11 is fixedly connected to a connecting seat 12, the upper surface of the connecting seat 12 is fixedly connected to a slide plate 13, the upper surface of the slide plate 13 is fixedly connected to a telescopic rod 14, and the outer wall of the telescopic rod 14 is provided with a spring 15.

[0026] Specifically, the thrust transmission effect of the universal coupling 11 is significant. In traditional lifting equipment, the transmission of thrust is often restricted, resulting in reduced work efficiency. The emergence of the universal coupling 11 effectively solves this problem. Through its special design, the thrust is more stable during transmission, reducing energy loss and ensuring the stable operation of the lifting equipment. Secondly, the universal coupling 11 has a good angle adjustment function. During the lifting process, the position and angle of the lifted object often need to be adjusted to facilitate the operator to pick up and place. With the help of the universal coupling 11, the angle of the hook body 1 can be easily adjusted, making the lifting process more flexible and improving work efficiency.

[0027] Reference Figure 2 The upper surface of the telescopic rod 14 is fixedly connected with a shell 16; the slide plate 13 is made of high-strength steel, and the tensile strength of the slide plate 13 is greater than the tensile strength of the connecting seat 12; the upper end of the spring 15 is fixedly connected to the inside of the shell 16, and the lower end of the spring 15 is fixedly connected to the upper surface of the slide plate 13; the outer wall of the slide plate 13 is slidably connected to the inside of the shell 16, and multiple side lengths of the connecting seat 12 are smaller than the width of the slide plate 13; the outer wall of the connecting seat 12 is slidably connected to the inside of the shell 16.

[0028] Specifically, when the suspended object is completely placed on the ground, the object will generate a reaction force on the hook. At this time, the role of the hook is no longer just to bear gravity, but it becomes a force transmitter. When the object exerts a reaction force on the hook, the hook will be driven by the force and then push the connecting block 10. In this process, the slide plate 13 will compress the telescopic rod 14 and the spring 15 upward. The role of the telescopic rod 14 and the spring 15 is to buffer the force between the hook and the suspended object. When the slide plate 13 compresses the telescopic rod 14 and the spring 15 upward, they will absorb part of the force, so that the force between the hook and the object is reduced, thereby reducing the impact and vibration during the lifting process.

[0029] Working principle: when a self-locking lifting hook is needed, the object to be lifted is first inserted into the lifting ring below the buckle 4, and then the crane is started, which drives the hook body 1 to rise, and the gravity of the object to be lifted is gradually applied to the lower end of the buckle 4, thereby pulling the buckle 4 to slide downward until the inclined surface of the buckle 4 fits with the inclined surface of the hook body 1, thereby achieving the effect of locking the object to be lifted and preventing the object to be lifted from falling off. When the object to be lifted is lowered, after the object to be lifted contacts the ground, the gravity of the object to be lifted is borne by the ground, and at this time the buckle 4 is no longer subjected to the pressure of the object to be lifted, so when the counterweight 5 pulls the buckle 4 up through the wire rope 3, the pulley 2 is changed The direction of the change wire rope 3, the buckle 4 drives the limit plate 8 to rise along the second slide groove 9, and then limits the sliding of the buckle 4, thereby unlocking the hook. At the same time, when the suspended object is just completely placed on the ground, the suspended object will exert a reaction force on the hook body 1. At this time, the hook body 1 pushes the connecting block 10, and then pushes the connecting seat 12 and the slide plate 13 through the universal coupling 11. The universal coupling 11 can not only make the transmission of thrust smoother, but also adjust the angle of the hook body 1 to facilitate the placement of the suspended object. The slide plate 13 compresses the telescopic rod 14 and the spring 15 upward, thereby achieving the effect of buffering the hook body 1 and the suspended object.

Claims

1. A self-locking lifting hook, comprising a hook body (1), characterized in that: The hook body (1) is an L-shaped structure, and a protrusion is provided at the end of its horizontal part to form a hook structure, and the surface of the protrusion is an inclined surface inclined toward the inner side of the hook; the top of the vertical part of the hook body (1) is internally rotatably connected to a pulley (2), and a steel wire rope (3) is wound around the pulley (2); the buckle (4) is a C-shaped structure, located in the hook structure of the hook body (1), the outer end surface of the bottom of the buckle (4) contacts the inner side surface of the protrusion of the hook body (1), and the upper end surface of the buckle (4) is an inclined surface, which cooperates with the inclined surface of the protrusion, and a closed structure is formed between the buckle (4) and the hook body (1) to achieve locking of the object to be hoisted; one end of the steel wire rope (3) is located outside the hook body (1) and is fixedly connected to the upper surface of the buckle (4), and the steel wire rope (3) is The other end is located inside the vertical part of the hook body (1) and is fixedly connected with a counterweight (5); the limit rod (6) is located inside the vertical part of the hook body (1) and is arranged horizontally; the inside of the counterweight (5) is rotatably connected to one end of the limit rod (6); a first slide groove (7) is provided inside the vertical part of the hook body (1), and the outer wall of the other end of the limit rod (6) is slidably connected to the inner wall of the first slide groove (7); the side wall of the buckle (4) is fixedly connected to a limit plate (8), and a vertical second slide groove (9) is penetrated through the side of the vertical part of the hook body (1) close to the buckle (4), and the outer wall of the limit plate (8) is slidably connected to the inside of the second slide groove (9); a fixing component is provided on the upper surface of the top of the hook body (1).

2. A self-locking lifting hook according to claim 1, characterized in that: The fixing assembly comprises a connecting block (10), the lower surface of the connecting block (10) being fixedly connected to the upper surface of the top of the hook body (1).

3. A self-locking lifting hook according to claim 2, characterized in that: A universal coupling (11) is arranged inside the connection block (10); the upper part of the universal coupling (11) is located outside the connection block (10); the top of the universal coupling (11) is fixedly connected to a connection seat (12); the upper surface of the connection seat (12) is fixedly connected to a slide plate (13); the upper surface of the slide plate (13) is fixedly connected to a plurality of telescopic rods (14); and the outer wall of the telescopic rod (14) is sleeved with a spring (15).

4. A self-locking lifting hook according to claim 3, characterized in that: The upper surface of the telescopic rod (14) is fixedly connected to a housing (16).

5. A self-locking lifting hook according to claim 4, characterized in that: The tensile strength of the slide plate (13) is greater than the tensile strength of the connecting seat (12).

6. A self-locking lifting hook according to claim 5, characterized in that: The upper end of the spring (15) is fixedly connected to the inside of the housing (16), and the lower end of the spring (15) is fixedly connected to the upper surface of the slide plate (13).

7. A self-locking lifting hook according to claim 6, characterized in that: The outer wall of the slide plate (13) is slidably connected to the interior of the shell (16), and the lengths of multiple sides of the connecting seat (12) are all smaller than the width of the slide plate (13).

8. A self-locking lifting hook according to claim 4, characterized in that: The outer wall of the connecting seat (12) is slidably connected to the interior of the shell (16).

9. A self-locking lifting hook according to claim 4, characterized in that: The upper surface of the shell (16) is provided with a connecting ring for connecting a crane.

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