A hook device with a self-locking structure

Abstract

This utility model discloses a hook device with a self-locking structure, relating to the field of stainless steel round bar technology. The hook device includes a lifting body, with a connecting plate on the upper part of the lifting body, and a rack movably connected to the connecting plate. The lifting body has a hook tip groove at its tip, which connects to a movable back tooth hook. A mating hole is provided on the side of the back tooth hook. The back tooth hook, back tooth, and mating hole are integrally formed. The rack and the back tooth's tooth profiles are connected. The back tooth and the mating hole are located on the same side. In use, the weight is first hung on the lifting body with a rope. The back tooth hook is then flipped to close the lifting body. The rack and the back tooth hook's tooth profiles engage to prevent the hook from opening automatically when the lifting body lifts the rope. Finally, the mating hole and the rack's round hole are connected by a pin, thus achieving locking and preventing disengagement.

Description

Technical Field

[0001] This utility model specifically relates to the field of hook technology, and more specifically to a hook device with a self-locking structure. Background Technology

[0002] In modern construction production, large-tonnage hoisting is becoming increasingly common, and the requirements for hoisting connectors are also becoming more stringent. When a crane is lifting an object, in order to ensure the stability and safety of the object, it is necessary to use items such as wire to seal the opening of the lifting ring. This is very inconvenient, time-consuming, and labor-intensive, and results in low work efficiency.

[0003] Chinese utility model publication number CN 205906930U discloses a self-locking lifting hook, which includes a hook and a pulley block connected to the hook. The upper part of the hook is provided with an electromagnetic device and a limiting block. The electromagnetic device is embedded inside the hook and is connected to a pressure detection device, which is located on the upper side of the lower part of the hook. The limiting block is located on the inner side wall of the upper part of the hook. The hook tip is hinged with a self-locking component that cooperates with the limiting block. The self-locking component has a V-shaped structure.

[0004] The hook in the aforementioned patent uses a V-shaped locking device to close the hook, and the V-shaped locking device uses the weight of the lifting rope itself to flip and close. However, if the hook is accidentally pulled at an angle, the V-shaped locking device will deflect according to the shift of the center of gravity of the lifting rope, which may result in the lifting rope coming off the hook. Utility Model Content

[0005] The purpose of this utility model is to provide a hook device with a self-locking structure, which closes the hook by setting a flip-locking part, and the flip-locking part is provided with a serrated groove, which can lock with the hook and will not disengage even in the event of oblique pulling, thus greatly improving the safety of the hook and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A hook device with a self-locking structure includes a lifting body, a connecting plate on the upper part of the lifting body, and a rack that is movably connected to the connecting plate; the rack has round holes on both sides at the end away from the connecting plate; the lifting body has a hook tip groove at the lifting tip, which is connected to a movable back tooth hook; a mating hole is formed between the back tooth hook and the back tooth; the back tooth hook, the back tooth, and the mating hole are integrally formed; the tooth profiles of the rack and the back tooth engage; the back tooth and the mating hole are located on the same side.

[0007] As a further technical solution of this utility model, the connecting plate is connected to the rack and pinion via a shaft pin.

[0008] As a further technical solution of this utility model, the rack has round holes on both sides at the end away from the connecting plate. As a further technical solution of this utility model, the hook tip groove is connected to the back tooth hook by a shaft pin, and the back tooth can be connected to the hanging rack.

[0009] As a further technical solution of this utility model, after the back teeth and the rack are closed, the round hole and the mating hole in the rack are connected by a pin.

[0010] As a further technical solution of this utility model, the inner and outer sides of the lifting body are respectively provided with an inner groove and an outer groove, and an arc-shaped spring piece is fixedly installed at the top of the inner groove near the back tooth hook. The spring piece is bent upward, and a connecting hole is opened through the top of the spring piece.

[0011] As a further technical solution of this utility model, a guide block is fixedly installed at the bottom end of the lifting body on the outside of the outer groove, and two sets of guide wheels are vertically movably installed at the central symmetrical position inside the guide block. A vertical connecting rod is installed at the center position of the top set of guide wheels, and a sleeve rod is fixedly installed at the top of the connecting rod. A return spring is connected between the sleeve rod and the connecting rod.

[0012] As a further technical solution of this utility model, a pull rope is installed inside the inner groove and the outer groove. The starting point of the pull rope is the pivot position of the back tooth hook. One end of the pull rope is fixedly connected to the pivot at the bottom of the back tooth hook. The pull rope passes through the pivot position of the back tooth hook, the inner groove, the connecting hole, the bottom of the connecting plate, the outer groove, and the inside of the guide block, and finally connects to the pivot position of the back tooth hook.

[0013] As a further technical solution of this utility model, a through hole is provided at the end of the rack, through which a limit spring is connected, and the other end of the limit spring is connected to the connecting end of the hanging body.

[0014] As a further technical solution of this utility model, a pull hole is provided at the end of the back tooth hook, and a pull belt is connected inside the pull hole.

[0015] Compared with the prior art, the beneficial effects of this utility model are: In use, the heavy object is first hung on the lifting body by a rope. Due to the arc-shaped structure inside the lifting body, the heavy object moves to the spring plate in the inner groove, applying pressure to the spring plate. At the same time, the spring plate descends, causing the pull rope through the connecting hole to move downwards, which in turn pulls the back tooth hook connected to the pull rope to rotate. Simultaneously, the tightening of the pull rope compresses the return spring inside the guide block. During this process, the back tooth hook flips towards the lifting body to close. When the back tooth hook rotates to the bottom of the hanging rack and engages, the back tooth hook continues to rotate, and the friction causes the hanging rack to rotate in the opposite direction, achieving meshing of the back tooth profiles of the two. Finally, the mating hole and the round hole of the hanging rack are connected by a pin, thereby achieving locking. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This utility model Figure 1 Partial structural diagram.

[0018] Figure 3 This utility model Figure 2 Another perspective view.

[0019] Figure 4 This utility model Figure 3 Floor plan.

[0020] Figure 5 This is a utility model Figure 1 Internal structure diagram of the intermediate guide block.

[0021] In the diagram: 1-Lifting body, 2-Hook tip groove, 3-Back tooth hook, 4-Back tooth, 5-Matching hole, 6-Connecting plate, 7-Hanging rack, 8-Inner groove, 9-Outer groove, 10-Spring piece, 11-Connecting hole, 12-Guide block, 13-Guide wheel, 14-Connecting rod, 15-Sleeve rod, 16-Reset spring, 17-Pull rope, 18-Limit spring. 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] Please see Figure 1-5In this embodiment of the utility model, a hook device with a self-locking structure includes a lifting body 1, a connecting plate 6 on the upper part of the lifting body 1, and a hanging rack 7 movably connected to the connecting plate 6; the hanging rack 7 has round holes on both sides at the end away from the connecting plate 6; the lifting tip of the lifting body 1 has a hook tip groove 2, which is connected to a movable back tooth hook 3; a mating hole 5 is formed between the back tooth hook 3 and the back tooth 4; the back tooth hook 3, the back tooth 4 and the mating hole 5 are integrally formed; the tooth profiles of the hanging rack 7 and the back tooth 4 are engaged; the back tooth 4 and the mating hole 5 are on the same side.

[0024] In this embodiment, the upper part of the lifting body 1 is provided with a connecting plate 6, and the connecting plate 6 is movably connected to the rack 7.

[0025] By adopting the above technical solution, the rack 7 is connected to the connecting plate 6 through the shaft pin, and the rack 7 can move up and down. This makes it easy for the rack 7 to engage with the back tooth 4 when the back tooth hook 3 flips inward, thereby ensuring the stability of the hook closure and avoiding the phenomenon of hook detachment.

[0026] In this embodiment, the lifting body 1 is provided with a hook tip groove 2 at the lifting tip, and the hook tip groove 2 is connected to a movable back tooth hook 3.

[0027] By adopting the above technical solution, the back tooth hook 3 is movably connected to the hook tip groove 2. Under normal circumstances, the back tooth hook 3 is located outside the lifting body 1. When lifting heavy objects, the lifting rope is first placed inside the lifting body 1. Then the back tooth hook 3 is flipped inside the lifting body 1. In this way, the lifting body 1, the back tooth hook 3 and the hanging rack 7 form a closed loop, which can lock the lifting rope and close the lifting rope.

[0028] In this embodiment, the back tooth hook 3, back tooth 4 and mating hole 5 are integrally formed; the tooth profiles of the hanging rack 7 and the back tooth 4 are engaged.

[0029] By adopting the above technical solution, after the tooth profiles are engaged, the round hole at the end of the rack 7 away from the connecting plate 6 and the mating hole 5 are locked by a shaft pin. This ensures the closing effect of the rack 7 and the back hook 3. This is a protection for special situations of crane operators, such as when the hook violates the lifting requirements and is pulled at an angle, it can also ensure that the lifting rope will not come off the hook, thereby enhancing the lifting safety of heavy objects.

[0030] In this embodiment, the back teeth 4 and the mating hole 5 are arranged on the same side.

[0031] The above technical solution is adopted to facilitate the meshing of the back teeth and the rack tooth profiles, and the pin connection between the round hole and the mating hole.

[0032] In this embodiment, the inner and outer sides of the lifting body 1 are respectively provided with an inner groove 8 and an outer groove 9, and an arc-shaped spring piece 10 is fixedly installed at the top of the inner groove 8 near the back tooth hook 3. The spring piece 10 is bent upward, and a connecting hole 11 is opened through the top of the spring piece 10.

[0033] In this embodiment, a guide block 12 is fixedly installed at the bottom end of the lifting body 1 on the outside of the outer groove 9, and two sets of guide wheels 13 are vertically movably installed at the central symmetrical position inside the guide block 12. A vertical connecting rod 14 is installed at the center of the top set of guide wheels 13, and a sleeve rod 15 is fixedly installed at the top of the connecting rod 14. A return spring 16 is connected between the sleeve rod 15 and the connecting rod 14.

[0034] In this embodiment, a pull rope 17 is installed inside the inner groove 8 and the outer groove 9. The starting point of the pull rope 17 is the pivot position of the back tooth hook 3. One end of the pull rope 17 is fixedly connected to the pivot at the bottom of the back tooth hook 3. The pull rope 17 passes through the pivot position of the back tooth hook 3, the inner groove 8, the connecting hole 11, the bottom of the connecting plate 6, the outer groove 9, and the interior of the guide block 12, and finally connects to the pivot position of the back tooth hook 3.

[0035] In this embodiment, a through hole is provided at the end of the rack 7, through which a limit spring 18 is connected, and the other end of the limit spring 18 is connected to the connecting end of the hanging body 1.

[0036] The back tooth hook 3 has a pull hole at its end, and a pull belt is connected inside the pull hole; The working principle of this utility model is as follows: When in use, the heavy object is first hung on the lifting body 1 by the sling rope. At this time, due to the arc-shaped structure on the inner side of the lifting body 1, the heavy object will move to the spring piece 10 at the inner groove 8 position and apply pressure to the spring piece 10. At the same time, the spring 10 descends, causing the pull rope 17 through the connecting hole 11 to move downwards, which in turn pulls the back tooth hook 3 connected to the pull rope 17 to rotate. Meanwhile, the tightening of the pull rope 17 will compress the return spring 16 inside the guide block 12. During this process, the back tooth hook 3 flips to close the lifting body 1. When the back tooth hook 3 rotates to the bottom of the hanging rack 7 and connects, the back tooth hook 3 continues to rotate, which will cause the hanging rack 7 to rotate in the opposite direction through friction, so that the back tooth 4 of the two can mesh and connect. Finally, the mating hole 5 and the round hole of the hanging rack 7 are connected by a shaft pin, so as to achieve locking and prevent the hook from coming off. On the other hand, when the lifting body is unlocked, the heavy object falls to the ground. First, the shaft pin inside the mating hole 5 is removed. There is no tension inside the guide block 12, so the reset spring 16 resets and pushes the pull rope 17 at the guide wheel 13 downward. At this time, a force is generated to cause the back tooth hook 3 to separate from the back tooth 4 at the rack 7. However, since the back teeth 4 are engaged, they cannot separate. During this process, the user pulls the pull belt at the end of the back tooth hook 3 downward. The back tooth hook 3 moves downward, and the limit spring 18 pulls the rack 7 upward to reset. The two then separate, completing the unlocking process.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hook device with a self-locking structure, characterized in that: The device includes a lifting body (1), a connecting plate (6) on the upper part of the lifting body (1), and a rack (7) movably connected to the connecting plate (6); the lifting body (1) has a hook tip groove (2) at the lifting tip, and the hook tip groove (2) is connected to a movable back tooth hook (3); the back tooth hook (3) has a mating hole (5) on its side; the back tooth hook (3), back tooth (4) and mating hole (5) are integrally set; the rack (7) and back tooth (4) are connected by tooth profiles; the back tooth (4) and mating hole (5) are set on the same side.

2. A hook device with a self-locking structure according to claim 1, characterized in that: The connecting plate (6) is connected to the rack (7) via a pin.

3. A hook device with a self-locking structure according to claim 1, characterized in that: The rack (7) has round holes on both sides at the end away from the connecting plate (6).

4. A hook device with a self-locking structure according to claim 1, characterized in that: The hook tip groove (2) is connected to the back tooth hook (3) by a shaft pin, and the back tooth (4) can engage with the tooth profile of the rack (7).

5. A hook device with a self-locking structure according to claim 1, characterized in that: After the back teeth (4) and the rack (7) are closed, the round hole in the rack (7) and the mating hole (5) are connected by a pin.

6. A hook device with a self-locking structure according to claim 1, characterized in that: The inner and outer sides of the lifting body (1) are respectively provided with an inner groove (8) and an outer groove (9), and an arc-shaped spring piece (10) is fixedly installed at the top of the inner groove (8) near the back tooth hook (3). The spring piece (10) is bent upward, and a connecting hole (11) is opened through the top of the spring piece (10).

7. A hook device with a self-locking structure according to claim 6, characterized in that: The bottom end of the lifting body (1) is fixedly installed with a guide block (12) on the outside of the outer groove (9), and two sets of guide wheels (13) are vertically installed at the center symmetrical position inside the guide block (12). A vertical connecting rod (14) is installed at the center of the top set of guide wheels (13), and a sleeve rod (15) is fixedly installed at the top of the connecting rod (14). A return spring (16) is connected between the sleeve rod (15) and the connecting rod (14).

8. A hook device with a self-locking structure according to claim 7, characterized in that: A pull rope (17) is installed inside the inner groove (8) and the outer groove (9). The starting point of the pull rope (17) is the pivot position of the back tooth hook (3). One end of the pull rope (17) is fixedly connected to the pivot at the bottom of the back tooth hook (3). The pull rope (17) passes through the pivot position of the back tooth hook (3), the inner groove (8), the connecting hole (11), the bottom of the connecting plate (6), the outer groove (9), and the interior of the guide block (12), and finally connects to the pivot position of the back tooth hook (3).

9. A hook device with a self-locking structure according to claim 8, characterized in that: The rack (7) has a through hole at its end, through which a limit spring (18) is connected. The other end of the limit spring (18) is connected to the connecting end of the hanging body (1).

10. A hook device with a self-locking structure according to claim 9, characterized in that: The back tooth hook (3) has a pull hole at its end, and a pull belt is connected inside the pull hole.

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