Bolt screwing-in type expansion nut

Abstract

The utility model relates to the technical field of expansion nuts, in particular to a bolt screwing-in type expansion nut which comprises a locking nut, an expansion nut and a connecting assembly used for connecting the locking nut and the expansion nut. The connecting assembly comprises a sliding groove formed in the outer wall of the locking nut, a plurality of sliding blocks are arranged in the sliding groove, and connecting pieces are fixed to the sliding blocks. The connecting piece is made of a spring piece material, the locking nut can be in contact with the expansion nut, one end of the connecting piece is welded to the expansion nut, the sliding block at the other end of the connecting piece is embedded into the sliding groove, the locking nut can be movably connected with the expansion nut, the expansion nut deforms under the action of a bolt, and therefore the expansion nut can be locked. And then the locking nut is rotated to rotate on the bolt, and the locking nut is propped against the expansion nut, so that the bolt can be fixed again.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion nuts, in particular to a bolt-screwed expansion nut. Background Technique

[0002] In a bolt-screwed expansion nut with the publication number of CN220505521U, the bolt-screwed expansion nut includes a nut body, and an internal thread matched with a standard bolt is arranged in the nut body; the nut body is divided into a first section and a second section, the first section is a conical surface, the end of the conical surface is the large end of the conical surface, and the end where the conical surface is connected to the second section is the small end; an axial notch is opened on the conical surface, and by means of the thread of the screwed-in bolt, the first section of the expansion nut embedded in the blind hole that the plastic part cannot penetrate expands outwards, so as to increase the normal pressure between the expansion nut and the plastic through hole. The more the bolt is screwed in, the greater the pre-tightening force of the connected part, and the greater the normal pressure between the expansion nut and the plastic through hole, thereby generating a greater static friction force, preventing the expansion nut from coming out of the plastic blind hole, and meeting the requirements of the bolt connection site where it is inconvenient to open through holes and there are sealing requirements.

[0003] Generally, when a general expansion nut is deformed under force, it provides a layer of fixation. If this fixation layer is damaged, it is easy to affect the fixation function of this layer of the expansion nut. For this reason, we propose a bolt-screwed expansion nut. Summary of the Invention

[0004] The purpose of the utility model is to provide a bolt-screwed expansion nut to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A bolt-screwed expansion nut, comprising:

[0007] A lock nut and an expansion nut, and a connection assembly for connecting the lock nut and the expansion nut;

[0008] The connection assembly includes a chute opened on the outer wall of the lock nut, several sliders are arranged inside the chute, and a connecting piece is fixed on the slider.

[0009] Preferably, the chute is annular, the chute is slidably connected with the slider and is locally adapted.

[0010] Preferably, several of the connecting pieces are welded on the expansion nut in an annular shape.

[0011] Preferably, the expansion nut includes a stress area and an expansion area, and an annular groove is opened between the stress area and the expansion area.

[0012] Preferably, a plurality of axial notches are provided in the expansion area.

[0013] Preferably, a plurality of deformation areas are provided in the expansion area.

[0014] Preferably, a plurality of arc grooves are provided on the outside of the deformation area.

[0015] Preferably, two crease wire grooves are provided inside the deformation area.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] The connecting piece provided by the present utility model is made of a spring piece material, which can bring the lock nut into contact with the expansion nut, weld one end of the connecting piece to the expansion nut, and embed the slider at the other end into the inside of the chute, so that the lock nut and the expansion nut can be movably connected. When the expansion nut deforms under the action of the bolt, then rotate the lock nut to rotate on the bolt, and press the lock nut against the expansion nut, the bolt can be fixed again.

[0018] The present utility model can press the expansion nut into the installation hole, apply pressure to the expansion nut through the bolt. Under the action of force, the expansion area of the expansion nut will deform, and the friction force of the expansion nut can be increased through a plurality of arc grooves, thereby increasing the firmness of the expansion nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the expansion nut of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the lock nut of the present utility model;

[0022] Figure 4 is a schematic connection structure diagram of the connecting piece and the slider of the present utility model.

[0023] In the figure:

[0024] 1. Lock nut;

[0025] 2. Expansion nut; 21. Ring groove; 22. Expansion area; 23. Axial notch; 24. Arc groove; 25. Crease wire groove;

[0026] 3. Connecting piece; 4. Slider; 5. Chute. DETAILED DESCRIPTION OF THE INVENTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1-4 , a bolt-screwed expansion nut, comprising:

[0029] A locking nut 1 and an expansion nut 2, and a connecting component for connecting the locking nut 1 and the expansion nut 2;

[0030] The connecting component includes a chute 5 opened on the outer wall of the locking nut 1. A plurality of sliders 4 are arranged inside the chute 5. A connecting piece 3 is fixed to the slider 4. The chute 5 is circular. The chute 5 is slidably connected with the slider 4 and is partially adapted. A plurality of connecting pieces 3 are welded to the expansion nut 2 in a circular shape.

[0031] In this embodiment, the connecting piece 3 is made of spring sheet material. The locking nut 1 can be contacted with the expansion nut 2, and one end of the connecting piece 3 is welded to the expansion nut 2. The slider 4 at the other end is embedded inside the chute 5, so that the locking nut 1 can be movably connected with the expansion nut 2. When the expansion nut 2 is deformed under the action of the bolt, then the locking nut 1 is rotated to rotate on the bolt, and the locking nut 1 is abutted against the expansion nut 2, and the bolt can be fixed again.

[0032] As Figure 1 and Figure 2 shown, the expansion nut 2 includes a stress area and an expansion area 22, and an annular groove 21 opened between the stress area and the expansion area 22. A plurality of axial notches 23 are opened in the expansion area 22. The expansion area 22 is provided with a plurality of deformation areas. A plurality of arc grooves 24 are opened outside the deformation areas. Two crease wire grooves 25 are opened inside the deformation areas.

[0033] In this embodiment, the expansion nut 2 can be pressed into the installation hole. The pressure is applied to the expansion nut 2 through the bolt. Under the action of the force on the expansion nut 2, the expansion area 22 of the expansion nut 2 will deform, and the friction force of the expansion nut 2 is increased through a plurality of arc grooves 24, so that the firmness of the expansion nut 2 can be increased.

[0034] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A bolt-screwed expansion nut, characterized in that, Comprising: A locking nut (1) and an expansion nut (2), and a connecting component for connecting the locking nut (1) and the expansion nut (2); The connecting component includes a chute (5) opened on the outer wall of the locking nut (1), and a plurality of sliders (4) are arranged inside the chute (5), and a connecting piece (3) is fixed to the slider (4).

2. The expansion nut with screw-in type bolt according to claim 1, wherein, The chute (5) is annular, the chute (5) is slidably connected with the slider (4) and is locally adapted.

3. The expanding nut with screw-in bolts according to claim 1, characterized in that, A plurality of the connecting pieces (3) are welded to the expansion nut (2) in an annular shape.

4. The expansion nut with screw-in type bolt according to claim 1, characterized in that The expansion nut (2) includes a stress area and an expansion area (22), and an annular groove (21) is opened between the stress area and the expansion area (22).

5. The expansion nut screwed with a bolt according to claim 4, characterized in that, A plurality of axial notches (23) are opened in the expansion area (22).

6. The expansion nut with screw-in bolts according to claim 4, characterized in that, A plurality of deformation areas are provided in the expansion area (22).

7. A bolt-screw-in type expansion nut according to claim 6, wherein, A plurality of arc grooves (24) are opened outside the deformation area.

8. The expansion nut with screw-in type bolt according to claim 7, characterized in that, Two crease wire grooves (25) are opened inside the deformation area.

Images