CN219472508U

CN219472508U - Elastic internal forcing expansion bolt

Info

Publication number: CN219472508U
Application number: CN202320454299.2U
Authority: CN
Inventors: 李雄; 李高峰; 段冬梅; 李志法
Original assignee: Handan Aojia Fastener Manufacturing Co ltd
Current assignee: Handan Aojia Fastener Manufacturing Co ltd
Priority date: 2023-03-11
Filing date: 2023-03-11
Publication date: 2023-08-04
Anticipated expiration: 2033-03-11

Abstract

The utility model discloses an elastic internal forcing expansion bolt which comprises a bolt, a nut and an expansion sleeve, wherein the upper end of the nut is connected with a locking assembly, and the locking assembly comprises a strip-shaped hole, a strip-shaped plate, a group of threaded holes, a group of threaded rods, a group of inner hexagon heads and a group of bolts. The elastic internal forcing type expansion bolt has the beneficial effects that the elastic internal forcing type expansion bolt is used for installing an installation piece to be fixed between the nut and the expansion sleeve, the upper end of the nut is connected with the locking assembly, the bolt and the nut can be relatively fixed by adopting a group of screws, the nut is prevented from loosening, and the spring is arranged at the upper end in the expansion sleeve, so that the force can not be directly applied to the expansion sleeve when the nut is installed, the spring plays a buffering role, and the damage of a reserved hole caused by excessive expansion of the expansion sleeve is prevented.

Description

Elastic internal forcing expansion bolt

Technical Field

The utility model relates to the field of expansion bolts, in particular to an elastic internal forcing expansion bolt.

Background

The expansion bolt consists of a countersunk bolt, an expansion pipe, a flat washer, a spring pad and a hexagonal nut, when the expansion bolt is used, an impact electric drill is used for drilling holes with corresponding sizes on a fixed body, then the bolt and the expansion pipe are arranged in the holes, and the bolt, the expansion pipe, the mounting piece and the fixed body can be expanded into a whole by screwing the nut.

In the prior art, the application number is CN 202020591050.2, and an expansion bolt is elastically fastened, and an expansion assembly is arranged so that a nut can not directly apply force to a transverse pipe, but the force of the nut is buffered through the elasticity of a spring; through the cooperation between threaded rod, screw hole, bolt and the transverse groove for nut and transverse tube can carry out relative fixation, improve the joint strength between this elasticity fastening expansion bolts and the external preformed hole. However, the spring and the threaded rod are respectively arranged between the nut and the transverse tube, so that a mounting piece which needs to be fixed cannot be mounted, and the use of the expansion bolt is affected.

The foregoing is not necessarily a prior art, and falls within the technical scope of the inventors.

Disclosure of Invention

In order to overcome the above drawbacks, the present utility model provides an elastic internal forcing expansion bolt, so as to solve the problem that the expansion bolt cannot fix the mounting member in the background art.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

an elastic internal forcing expansion bolt comprises a bolt, a nut and an expansion sleeve, wherein the upper end of the nut is connected with a locking assembly;

the locking assembly comprises a strip-shaped hole, a strip-shaped plate, a group of threaded holes, a group of screws, a group of hexagon socket heads and a group of bolts, wherein the strip-shaped hole is formed in the upper end of the bolt, the strip-shaped plate is inserted into the strip-shaped hole, the group of threaded holes are formed in the two sides of the strip-shaped plate, the group of screws are movably and rotatably screwed into the group of threaded holes, the group of hexagon socket heads are arranged at the upper end of the group of screws, and the group of bolts are arranged at the bottom of the group of screws.

Further, the upper end of the expansion sleeve is provided with a boss, a circular groove is formed in the boss, and a spring is arranged in the circular groove.

Furthermore, the bottom of the nut is provided with a connecting ring, and a plurality of slots are uniformly formed in the connecting ring.

Further, the bottom of the bolt is provided with a front end section.

Further, a plurality of protruding blocks are uniformly arranged on the outer surface of the expansion sleeve, and a plurality of openings parallel to the axial direction of the bolt are formed in the bottom of the expansion sleeve.

The utility model provides an elastic internal forcing type expansion bolt which has the advantages that an installation piece to be fixed is installed between a nut and an expansion sleeve, the upper end of the nut is connected with a locking assembly, the bolt and the nut can be relatively fixed by adopting a group of screws, the nut is prevented from loosening, and a spring is arranged at the upper end in the expansion sleeve, so that the force can not be directly applied to the expansion sleeve when the nut is installed, the spring plays a buffering role, and the damage of a reserved hole caused by excessive expansion of the expansion sleeve is prevented.

Drawings

FIG. 1 is a schematic view of an elastic internal forcing expansion bolt according to the present utility model.

Fig. 2 is a schematic view of a strip plate according to the present utility model.

Fig. 3 is a top view of the nut of the present utility model.

Fig. 4 is a schematic view of an expanded casing according to the present utility model.

Fig. 5 is an external view of an elastic internal forcing expansion bolt according to the present utility model.

In the figure: 1. a bolt; 2. a nut; 3. expanding the casing; 4. a bar-shaped hole; 5. a strip-shaped plate; 6. a threaded hole; 7. a screw; 8. an inner hexagon head; 9. a plug pin; 10. a boss; 11. a circular groove; 12. a spring; 13. a connecting ring; 14. a slot; 15. a front end section; 16. a bump; 17. an opening.

Description of the embodiments

The utility model is described in detail below with reference to the accompanying drawings, as shown in fig. 1-5: an elastic internal forcing expansion bolt comprises a bolt 1, a nut 2 and an expansion sleeve 3, wherein the upper end of the nut 2 is connected with a locking assembly; the locking assembly comprises a strip-shaped hole 4, a strip-shaped plate 5, a group of threaded holes 6, a group of screws 7, a group of inner hexagon heads 8 and a group of bolts 9, wherein the strip-shaped hole 4 is formed at the upper end of the bolt 1, the strip-shaped plate 5 is inserted into the strip-shaped hole 4, the group of threaded holes 6 are formed at the two sides of the strip-shaped plate 5, the group of screws 7 are movably and rotatably screwed into the group of threaded holes 9, the group of inner hexagon heads 8 are arranged at the upper end of the group of screws 7, and the group of bolts 9 are arranged at the bottom of the group of screws 7; a boss 10 is arranged at the upper end of the expansion sleeve 3, a circular groove 11 is formed in the boss 10, and a spring 12 is arranged in the circular groove 11; the bottom of the nut 2 is provided with a connecting ring 13, and a plurality of slots 14 are uniformly formed in the connecting ring 13; the bottom of the bolt 1 is provided with a front end section 15; the outer surface of the expansion sleeve 3 is uniformly provided with a plurality of convex blocks 16, and the bottom of the expansion sleeve 3 is provided with a plurality of openings 17 parallel to the axial direction of the bolt 1.

The working principle of the embodiment is as follows: the upper end of the expansion sleeve 3 is provided with a boss 10, a circular groove 11 is formed in the boss 10, a spring 12 is installed in the circular groove 11, the spring 12 extends out of the circular groove 11 in an initial state, as shown in fig. 4, when the elastic internal forcing expansion bolt is used, the bolt 1 and the expansion sleeve 3 are firstly installed in a reserved hole;

when locking: when the mounting piece and the nut 2 which need to be fixed are sequentially mounted and the nut 2 is hung downwards and screwed, the spring 12 is pressed into the circular groove 11 through the mounting piece, so that the nut 2 can not directly apply force to the expansion sleeve 3, the spring 12 plays a role in buffering, the damage of a reserved hole caused by excessive expansion of the expansion sleeve 3 is prevented, the nut 2 is continuously hung downwards and screwed, the bolt 1 is driven to move upwards, the front end section 15 at the bottom of the bolt 1 extrudes the expansion sleeve 3, the expansion sleeve 3 is tightly abutted against the inner wall of the reserved hole outside, and the bump 16 improves the tight fit between the expansion sleeve 3 and the reserved hole outside;

the upper end of the bolt 1 is provided with a strip-shaped hole 4, the strip-shaped plate 5 is inserted in the strip-shaped hole 4, the strip-shaped plate 5 is provided with a group of threaded holes 6, the bottom of the nut 2 is provided with a connecting ring 13, a plurality of slots 14 are uniformly formed in the connecting ring 13, when the nut 2 is hung and screwed down, one group of the slots 14 are opposite to one group of the threaded holes 6, then, a group of screws 7 are respectively inserted in one group of the threaded holes 6, one group of screws 7 are hung down through one group of hexagon socket heads 8, one group of bolts 9 at the bottom of the screw 7 are inserted in the opposite group of the slots 14 on the connecting ring 13 at the bottom of the nut 2, as shown in fig. 1, the nut is fixed, a mounting piece to be fixed is mounted between the nut 2 and the expansion sleeve 3, and the upper end of the nut 2 is connected with a locking assembly which can relatively fix the bolt 1 and the nut 2 by adopting the group of screws 7, so that the nut 2 is prevented from loosening.

The above technical solution only represents the preferred technical solution of the present utility model, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present utility model, and the technical solution falls within the scope of the present utility model.

Claims

1. An elastic internal forcing expansion bolt comprises a bolt (1), a nut (2) and an expansion sleeve (3), and is characterized in that the upper end of the nut (2) is connected with a locking assembly;

the locking assembly comprises a strip-shaped hole (4), a strip-shaped plate (5), a group of threaded holes (6), a group of threaded rods (7), a group of inner hexagon heads (8) and a group of bolts (9), wherein the strip-shaped hole (4) is formed in the upper end of the bolt (1), the strip-shaped plate (5) is inserted into the strip-shaped hole (4), the group of threaded holes (6) are formed in the two sides of the strip-shaped plate (5), the group of threaded rods (7) are movably and rotatably screwed into the group of threaded holes (6), the group of inner hexagon heads (8) are arranged at the upper ends of the group of threaded rods (7), and the group of bolts (9) are arranged at the bottom of the group of threaded rods (7).

2. An elastic internal forcing type expansion bolt according to claim 1, characterized in that a boss (10) is arranged at the upper end of the expansion sleeve (3), a circular groove (11) is formed in the boss (10), and a spring (12) is arranged in the circular groove (11).

3. An elastic internal forcing type expansion bolt according to claim 1, wherein the bottom of the nut (2) is provided with a connecting ring (13), and a plurality of slots (14) are uniformly formed in the connecting ring (13).

4. An elastic internal forcing expansion bolt according to claim 1, characterized in that the bottom of the bolt (1) is provided with a front end section (15).

5. An elastic internal forcing type expansion bolt according to claim 1, characterized in that the outer surface of the expansion sleeve (3) is uniformly provided with a plurality of protruding blocks (16), and the bottom of the expansion sleeve (3) is provided with a plurality of openings (17) parallel to the axial direction of the bolt (1).