Anti-falling nut for lifting hook

Abstract

The utility model relates to the technical field of fasteners, in particular to an anti-drop nut for a lifting hook, which comprises a nut, the nut comprises a nut body, a contraction ring, a clamping block, a screw cavity, limiting teeth, a limiting ring and a fastening bolt, the contraction ring is arranged in the nut body and is inwards connected with the clamping block, and the clamping block is arranged in the screw cavity. The clamping block is inwards connected to the side of the screw cavity, a limiting ring is arranged on the lower side of the nut body, limiting teeth are arranged in the limiting ring, and a fastening bolt is arranged on one side of the nut body. According to the anti-falling nut for the lifting hook, the contraction ring and the clamping block are arranged to fasten the screw rod, so that the anti-falling capability of the nut is improved; the limiting teeth are arranged on the lower side of the nut, higher friction force can be provided for the connecting position, it is guaranteed that the lifting hook keeps stable and safe in the using process, accidents are avoided, and workers are protected.

Description

[Technical field]

[0001] The utility model relates to the technical field of fasteners, and more specifically to an anti-dropping nut for a lifting hook. [Background technology]

[0002] Bolts and nuts are one of the common mechanical fasteners and are widely used in aerospace, engineering machinery, rail transportation, automotive molds, medical equipment, electronic information, machine tools and other fields. Ordinary standard threaded connections are safe and reliable under static loads, but when ordinary standard nuts are in vibration, impact and other environments, the friction between the thread pairs will gradually decrease or disappear, resulting in threaded connections being unscrewed or loosened. In actual engineering, such failures can easily lead to the machine not being able to work properly or even catastrophic accidents. Therefore, solving the problem of threaded connections falling off in engineering practice has become a major problem that needs to be solved urgently.

[0003] An existing plastic locking anti-loosening nut, with the announcement number: CN 219888459 U, includes a nut body, wherein the nut body includes a normal nut portion, a plastic deformation locking portion, and a gasket portion, wherein the normal nut portion is arranged above the plastic deformation locking portion, and the gasket portion is arranged below the plastic deformation locking portion. A plastic deformation locking portion is provided at one end of the body of the utility model, and when in use, the plastic deformation locking portion is irreversibly plastically deformed by an external force, and after the plastic deformation locking portion is deformed, it can be tightly matched with the screw rod to achieve self-locking, thereby preventing the nut from loosening or losing. Improving the anti-loosening ability of the nut only by the plastic deformation locking portion is not effective when a high-strength fixed connection is required. Now, there is a need for an anti-falling nut for a lifting hook to be fastened and connected to prevent the lifting hook from vibrating and falling off, and to be safer when in use. [Utility Model Content]

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide an anti-falling nut for a lifting hook, which provides good anti-falling performance.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-dropping nut for a lifting hook, comprising a nut, wherein the nut comprises a nut body, a shrinking ring, a clamping block, a screw cavity, limiting teeth, a limiting ring, and a fastening bolt, a shrinking ring is provided inside the nut body, the shrinking ring is connected inwardly to the clamping block, the clamping block is connected inwardly to the screw cavity side, a limiting ring is provided on the lower side of the nut body, limiting teeth are provided inside the limiting ring, and a fastening bolt is provided on one side of the nut body.

[0006] Preferably, the nut is connected to the screw rod via an internal thread, and a connecting block is provided on the lower side of the nut.

[0007] Preferably, the nut body is a hexagonal nut.

[0008] Preferably, the shrink ring comprises a ring body and a shrink opening, the ring body is in a circular ring shape, and a shrink opening is provided on a side of the ring body away from the fastening bolt.

[0009] Preferably, the shrink ring is provided with clamping blocks on both sides thereof, and the clamping blocks are provided with internal threads matching the screw rod.

[0010] Preferably, the clamping block is made of rubber.

[0011] Preferably, the screw cavity is evenly provided with internal threads.

[0012] Preferably, the limiting teeth are a plurality of teeth, the limiting teeth are arranged in the limiting ring, and the height of the limiting teeth is greater than the thickness of the limiting ring.

[0013] Preferably, the fastening bolt is connected to one side of the nut body via a thread, and the fastening bolt is connected inwardly to the shrink ring.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model discloses an anti-dropping nut for a lifting hook, which tightens a screw rod through a shrinking ring and a clamping block, thereby improving the anti-dropping ability of the nut; limiting teeth are arranged on the lower side of the nut, which can provide higher friction force to the connection, ensure that the hook remains stable and safe during use, avoid accidents and protect workers.

Brief Description of the Drawings

[0016] Figure 1 This is a structural schematic diagram of a lifting hook of the utility model when connected with an anti-dropping nut;

[0017] Figure 2 This is a schematic diagram of the structure of an anti-dropping nut for a lifting hook of the utility model;

[0018] Figure 3 This is a schematic diagram of the top view of the structure of an anti-dropping nut for a lifting hook of the utility model;

[0019] In the figure: 1-screw, 2-nut, 21-nut body, 22-shrink ring, 221-ring body, 223-shrink port, 23-clamping block, 24-screw cavity, 25-limiting teeth, 26-limiting ring, 27-fastening bolt, 3-connecting block. [Specific implementation method]

[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 In an embodiment of the utility model, a lifting hook anti-drop nut is provided, wherein the nut 2 is connected to the screw rod 1 through an internal thread, and a connecting block 3 is provided at the lower side of the nut 2.

[0022] See also Figure 2 , Figure 3 In the embodiment of the utility model, a lifting hook anti-drop nut includes a nut 2, the nut includes a nut body 21, a shrinking ring 22, a clamping block 23, a screw cavity 24, a limiting tooth 25, a limiting ring 26, and a fastening bolt 27. The nut body 21 is a hexagonal nut, and a shrinking ring 22 is arranged inside the nut body 21. The shrinking ring 22 includes a ring body 221 and a shrinking opening 222. The ring body 221 is annular, and a shrinking opening 222 is arranged on a side of the ring body 221 away from the fastening bolt 27. The shrinking ring 22 is connected inwardly to the clamping block 23, and the shrinking ring 22 is provided with rubber material on the upper and lower sides. A clamping block 23 is provided, the clamping block 23 is provided with an internal thread matching the screw 1, the clamping block 23 is connected inwardly to the screw cavity 24 side, the screw cavity 24 is evenly provided with internal threads, a limiting ring 26 is provided on the lower side of the nut body 21, and a limiting tooth 25 is provided in the limiting ring 26, the limiting tooth 25 is a plurality of teeth, the limiting tooth 25 is arranged in the limiting ring 26, the height of the limiting tooth 25 is greater than the thickness of the limiting ring 26, a fastening bolt 27 is provided on one side of the nut body 21, the fastening bolt 27 is connected to one side of the nut body 21 by threading, and the fastening bolt 27 is connected inwardly to the shrink ring 22.

[0023] Working principle:

[0024] When the utility model discloses an anti-dropping nut for a lifting hook, the nut 2 is installed on the screw rod 1, and the screw rod cavity 24 is connected with the external thread of the adapted screw rod 1 by rotation. After installation in place, the fastening bolt 27 on one side of the nut 2 is rotated to push in, and the shrinking ring 22 is contracted inwardly, so that the clamping block 23 of the shrinking ring 22 is squeezed inwardly to provide better fastening force. The connection between the nut 2 and the connecting block 3 provides higher fastening due to the friction brought by the set limiting teeth 25.

[0025] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. An anti-drop nut for a lifting hook, characterized in that: The invention comprises a nut (2), wherein the nut comprises (2) a nut body (21), a shrinking ring (22), a clamping block (23), a screw cavity (24), a limiting tooth (25), a limiting ring (26), and a fastening bolt (27). A shrinking ring (22) is provided inside the nut body (21), the shrinking ring (22) is connected inwardly to the clamping block (23), the clamping block (23) is connected inwardly to the screw cavity (24), a limiting ring (26) is provided on the lower side of the nut body (21), the limiting tooth (25) is provided inside the limiting ring (26), and a fastening bolt (27) is provided on one side of the nut body (21).

2. The anti-drop nut for a lifting hook according to claim 1, characterized in that: The nut (2) is connected to the screw rod (1) via an internal thread, and a connecting block (3) is provided on the lower side of the nut (2).

3. The anti-drop nut for a lifting hook according to claim 1, characterized in that: The nut body (21) is a hexagonal nut.

4. The anti-drop nut for a lifting hook according to claim 1, characterized in that: The shrink ring (22) comprises a ring body (221) and a shrink opening (222); the ring body (221) is in a circular ring shape, and a shrink opening (222) is provided on a side of the ring body (221) away from the fastening bolt (27).

5. The anti-drop nut for a lifting hook according to claim 1, characterized in that: The shrink ring (22) is provided with clamping blocks (23) on both sides thereof, and the clamping blocks (23) are provided with internal threads matching the screw rod (1).

6. The anti-drop nut for a lifting hook as claimed in claim 5, characterized in that: The clamping block (23) is made of rubber material.

7. The anti-drop nut for a lifting hook according to claim 1, characterized in that: The screw cavity (24) is evenly provided with internal threads.

8. The anti-drop nut for a lifting hook according to claim 1, characterized in that: The limiting teeth (25) are a plurality of teeth, and the limiting teeth (25) are arranged in the limiting ring (26). The height of the limiting teeth (25) is greater than the thickness of the limiting ring (26).

9. The anti-drop nut for a lifting hook according to claim 1, characterized in that: The fastening bolt (27) is connected to one side of the nut body (21) through a thread, and the fastening bolt (27) is connected inwardly to the shrink ring (22).

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