CN214998687U

CN214998687U - Expansion screw with improved structure

Info

Publication number: CN214998687U
Application number: CN202023175070.0U
Authority: CN
Inventors: 黄祺裕
Original assignee: Suzhou Houqiao Metal Products Co ltd
Current assignee: Suzhou Houqiao Metal Products Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-12-03
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses an expansion screw of institutional advancement, including the expand tube, cup jointed countersunk bolt in the expand tube, countersunk bolt has hexagon nut through the one end spiro union of expand tube, is equipped with bullet pad and flat pad between hexagon nut and the expand tube, but the one end sliding connection that the expand tube is close to hexagon nut has axial displacement's antiskid portion, but the one end shaping that antiskid portion is close to hexagon nut has regular polygon boss. The utility model discloses a set up a telescopic antiskid portion in the expand tube, can prevent that the expand tube from taking place the phenomenon of skidding, can improve the stability between expansion screw and the wall body.

Description

Expansion screw with improved structure

Technical Field

The utility model relates to a screw technical field, concretely relates to construction improvement's inflation screw.

Background

The expansion screw is generally a metal expansion screw, and the expansion screw is fixed by utilizing the wedge-shaped slope to promote expansion to generate friction bond force so as to achieve the fixing effect. One end of the screw is provided with threads, the other end of the screw is provided with a taper, an expansion pipe is wrapped outside the screw, a half of the expansion pipe is provided with a plurality of notches, the expansion pipe and the nut are plugged into a hole drilled in a wall together, then the nut is locked, the screw is pulled outwards by the nut, the taper is pulled into the iron sheet cylinder, and the iron sheet cylinder is expanded and is then tightly fixed on the wall, so that the screw is generally used for fastening protective guards, rain awnings, air conditioners and other materials on cement, bricks and the like. However, when the nut is screwed, the nut drives the expansion pipe to rotate through the screw, and the expansion pipe slips from the bottom hole of the wall body, so that the expansion pipe cannot be stably fixed with the wall body.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art not enough, providing a institutional advancement's inflation screw, it can prevent that the expand tube from taking place the phenomenon of skidding through set up a telescopic antiskid portion in the expand tube, can improve the stability between inflation screw and the wall body.

The utility model provides a technical problem's scheme is:

the utility model provides an expansion screw of institutional advancement, includes the expand tube, has cup jointed countersunk bolt in the expand tube, and countersunk bolt passes the one end spiro union of expand tube and has had hexagon nut, is equipped with bullet pad and flat pad between hexagon nut and the expand tube, but the one end sliding connection that the expand tube is close to hexagon nut has axial displacement's antiskid portion, but the one end shaping that antiskid portion is close to hexagon nut has regular polygon boss.

The one end shaping that the expand tube is close to hexagon nut has the splined hole, the one end shaping that hexagon nut was kept away from to antiskid portion has the outer wall spline, and outer wall spline plug bush is downthehole at the spline.

The maximum outer diameter of the regular polygon boss is smaller than the minimum inner diameter of the spline hole.

The number of the edges of the regular polygon boss is even, and a fillet is formed at each edge of the multi-polygon boss.

The length of the anti-skid part in the axial direction is smaller than the depth of the spline hole.

The utility model discloses an outstanding effect is: compared with the prior art, the expansion pipe is provided with the telescopic anti-skidding part in the expansion pipe, so that the expansion pipe can be prevented from skidding, and the stability between the expansion screw and a wall body can be improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a cross-sectional view of fig. 2 taken about B-B.

Detailed Description

An embodiment, see as shown in fig. 1 to fig. 3, an expansion screw with an improved structure, includes an expansion tube 1, a countersunk head bolt 2 is sleeved in the expansion tube 1, the countersunk head bolt 2 is screwed with a hexagon nut 3 through one end of the expansion tube 1, an elastic pad 4 and a flat pad 5 are arranged between the hexagon nut 3 and the expansion tube 1, one end of the expansion tube 1 close to the hexagon nut 3 is slidably connected with an axially movable anti-slip part 6, and one end of the anti-slip part 6 close to the hexagon nut 3 is formed with a regular polygon boss 61.

Furthermore, a splined hole 11 is formed at one end, close to the hexagon nut 3, of the expansion pipe 1, an outer wall spline 62 is formed at one end, far away from the hexagon nut 3, of the antiskid part 6, and the outer wall spline 62 is inserted and sleeved in the splined hole 11.

Further, the maximum outer diameter of the regular polygonal boss 61 is smaller than the minimum inner diameter of the spline hole 11.

More specifically, the number of the edges of the regular polygonal boss 61 is even, and a rounded corner 63 is formed at each edge of the polygonal boss 61.

Further, the length of the antiskid portion 6 in the axial direction is smaller than the depth of the spline hole 11.

The working principle is as follows: the expanding pipe 1 is inserted and sleeved in a bottom hole in a wall body, then a regular polygon boss 61 of the anti-skid part 6 is clamped by a wrench, then the hexagon nut 3 is rotated, the hexagon nut 3 drives the countersunk head bolt 2 to be pulled outwards, so that the inner end of the expanding pipe is opened to be tightly contacted with the bottom hole, then the wrench is taken down, and the anti-skid part 6 is completely retracted into the expanding pipe.

Finally, the above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. The utility model provides an expansion screw of institutional advancement, includes expand tube (1), has cup jointed countersunk bolt (2) in expand tube (1), and countersunk bolt (2) pass one end spiro union of expand tube (1) have hex nut (3), are equipped with between hex nut (3) and expand tube (1) and play pad (4) and flat pad (5), its characterized in that: but expand tube (1) is close to the one end sliding connection of hexagon nut (3) has axially movable's antiskid portion (6), but the one end shaping that antiskid portion (6) are close to hexagon nut (3) has regular polygon boss (61).

2. An improved expansion screw as claimed in claim 1, wherein: the one end shaping that expand tube (1) is close to hexagon nut (3) has splined hole (11), the one end shaping that hexagon nut (3) was kept away from in antiskid portion (6) has outer wall spline (62), and outer wall spline (62) plug bush is in splined hole (11).

3. An improved expansion screw as claimed in claim 2, wherein: the maximum outer diameter of the regular polygonal boss (61) is smaller than the minimum inner diameter of the spline hole (11).

4. An improved expansion screw as claimed in claim 1, wherein: the number of the edges of the regular polygon boss (61) is even, and a round angle (63) is formed at each edge of the regular polygon boss (61).

5. An improved expansion screw as claimed in claim 2, wherein: the length of the anti-skid part (6) in the axial direction is smaller than the depth of the spline hole (11).