CN210397362U

CN210397362U - Wall built-in expansion screw sleeve

Info

Publication number: CN210397362U
Application number: CN201921106717.9U
Authority: CN
Inventors: 吴东坡; 毛必雄; 吴宣甬
Original assignee: Ningbo Haishu Machinery Standard Parts Factory
Current assignee: Ningbo Haishu Machinery Standard Parts Factory
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-04-24
Anticipated expiration: 2029-07-15

Abstract

The utility model provides a built-in inflation swivel nut of wall body. The utility model belongs to the technical field of the fixed device of working face, it has solved current expansion screw and has used inconvenient problem. The utility model discloses built-in inflation swivel nut of wall body includes inflation cover, locking screw and lock nut. The utility model discloses in, when the inclined plane of fastening head and the one end zonulae occludens of inflation cover, when the other end zonulae occludens of spacing ring and inflation cover, in the inclined plane crowded inflation cover, simultaneously, the diameter of inflation cover also increases thereupon to make the anticreep piece can block downthehole at the wall body, thereby reduce the probability that this inflation swivel nut drops in following the wall body. Secondly, be equipped with the stiffening ring on the side of inflation cover, this stiffening ring's setting has effectively increased the fastness of inflation cover for locking screw and lock nut are at threaded connection in-process, and the inflation cover is not fragile.

Description

Wall built-in expansion screw sleeve

Technical Field

The utility model belongs to the technical field of the fixed device of working face, a built-in inflation swivel nut of wall body is related to.

Background

The expansion screw is a common working face fixing device, when the expansion screw sleeve is used, firstly, a drill hole matched with the outer diameter of the expansion screw sleeve is formed in a working face (such as a wall surface and the ground) by a drilling machine, then, the expansion screw sleeve is firstly installed in the drill hole, then, the self-tapping screw is screwed in, and the expansion screw sleeve is outwards expanded to be combined with a drilled hole in a wall, so that a fixing effect is achieved; in practical use, however, when the pulling force of the outside on the expansion sleeve is greater than the friction force of the working face on the expansion sleeve, the expansion sleeve falls out of the drill hole, so that the installation of the expansion screw is unstable; secondly, when the expansion thread insert is actually used, the expansion thread insert is not attractive when being idle, is not easy to remove when being idle, and has poor repeated use effect;

in addition, some expansion thread sleeves on the market are made of plastics, but the plastics have low hardness and good plasticity, so that the expansion force is insufficient, heavy objects cannot be hung, and the plastics are easy to age, so that the stability is poor.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides an expansion thread insert with good stability and good use effect.

The purpose of the utility model can be realized by the following technical proposal: the built-in inflation swivel nut of wall body includes:

an expansion sleeve;

the locking screw is positioned and inserted in the expansion sleeve;

the locking nut is inserted into the expansion sleeve in a positioning mode and connected with the locking screw, a screw hole is formed in the locking nut, and a limiting ring for installing the locking nut in the expansion sleeve in a positioning mode is arranged at one end of the locking nut.

In the expansion thread insert built in the wall body, one end of the locking screw is provided with a fastening head, and the side surface of the fastening head is provided with an inclined surface.

In the expansion thread insert arranged in the wall body, at least two positioning strips are arranged on the inclined surface.

In the expansion threaded sleeve arranged in the wall body, an expansion gap and a positioning notch are formed in the expansion sleeve.

In the expansion thread insert arranged in the wall body, a reinforcing ring is arranged on the side surface of the expansion thread insert.

In the expansion thread insert arranged in the wall body, a plurality of anti-falling sheets are arranged on the side surface of the expansion thread insert along the central axis of the expansion thread insert in an annular array.

In the wall built-in expansion thread insert, a rotating hole is formed in the limiting ring, and the screw hole is communicated with the rotating hole.

In the above expansion screw sleeve built in the wall body, the cross section of the rotation hole may be a triangle, a quadrangle, a pentagon or a hexagon.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses in, when the inclined plane of fastening head and the one end zonulae occludens of inflation cover, when the other end zonulae occludens of spacing ring and inflation cover, in the inclined plane crowded inflation cover, simultaneously, the diameter of inflation cover also increases thereupon to make the anticreep piece can block downthehole at the wall body, thereby reduce the probability that this inflation swivel nut drops in following the wall body.

2. Be equipped with the strengthening ring on the side of inflation cover, the setting of this strengthening ring has effectively increased the fastness of inflation cover for locking screw and lock nut are in threaded connection in the process, and the inflation cover is not fragile.

3. Through the fact that one positioning strip is embedded into the positioning notch and the other positioning strip is embedded into the expansion gap, the phenomenon that the locking screw moves in a staggered mode relative to the expansion sleeve in the use process of the expansion screw sleeve is avoided.

4. The whole expansion threaded sleeve can be immersed into a wall body, and the expansion threaded sleeve can be screwed in the wall body, so that the outer wall is clean and tidy.

5. When the expansion threaded sleeve is not used, only the bolt arranged in the threaded hole needs to be dismantled, and the expansion threaded sleeve is wholly immersed in the wall body and does not need to be dismantled; when the expansion thread insert is used for the next time, only the corresponding bolt needs to be screwed in, so that the expansion thread insert is convenient for people to use, and the reuse effect of the expansion thread insert is enhanced.

6. The utility model discloses in, the built-in inflation swivel nut of wall body is by the preparation of metallic iron material for this inflation swivel nut is difficult ageing, has effectively improved the stability of this inflation swivel nut.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of the expansion shell.

Fig. 3 is a schematic structural view of the lock nut.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-3, the expansion screw sleeve 300 built in the wall of the present invention includes an expansion sleeve 100, a locking screw 200 and a locking nut 300.

The locking screw 200 is positioned and inserted in the expansion sleeve 100, the locking nut 300 is connected with the locking screw 200, a screw hole 310 is formed in the locking nut 300, a limiting ring 320 for positioning and installing the locking nut 300 in the expansion sleeve 100 is arranged at one end of the locking nut 300, when the locking nut 300 is installed, people need to insert the locking screw 200 into the expansion sleeve 100, then insert the locking nut 300 into the expansion sleeve 100, and connect the locking screw 200 and the screw hole 310 of the locking nut 300 together in a threaded manner, in the process, when the limiting ring 320 abuts against one end of the expansion sleeve 100 and one end of the locking screw 200, far away from the locking nut 300, abuts against the expansion sleeve 100, the locking screw 200, the expansion sleeve 100 and the locking nut 300 can be connected together.

One end of the locking screw 200 is provided with a fastening head 210, the side surface of the fastening head 210 is provided with an inclined surface 220, the inclined surface 220 is provided with at least two positioning strips 221, the expansion sleeve 100 is provided with an expansion gap 110 and a positioning notch 120, in the process of threaded connection between the locking screw 200 and the locking nut 300, namely, when the inclined surface 220 of the fastening head 210 abuts against the expansion sleeve 100, one positioning strip 221 needs to be embedded into the positioning notch 120, and the other positioning strip 221 is embedded into the expansion gap 110, so that the phenomenon that the locking screw 200 moves in a dislocation way relative to the expansion sleeve 100 in the using process of the expansion sleeve 300 is avoided.

The side face of the expansion sleeve 100 is provided with the reinforcing ring 130, and the arrangement of the reinforcing ring 130 effectively increases the firmness of the expansion sleeve 100, so that the expansion sleeve 100 is not easy to damage in the process of connecting the locking screw 200 and the locking nut 300 in a threaded manner.

The side of the expansion shell 100 is provided with a plurality of anti-slip tabs 140 in an annular array along its central axis.

The limiting ring 320 is internally provided with a rotating hole 321, the screw hole 310 is communicated with the rotating hole 321, the cross section of the rotating hole 321 can be a triangle, a quadrangle, a pentagon or a hexagon, when the inclined surface 220 of the fastening head 210 abuts against one end of the expansion sleeve 100, and the limiting ring 320 abuts against the other end of the expansion sleeve 100, the locking screw 200 is in threaded connection with the screw hole 310, and the positioning strip 221 at the moment is embedded into the corresponding expansion gap 110 or the positioning notch 120, and then, people need to adopt a tool corresponding to the rotating hole 321, insert the tool into the rotating hole 321, rotate the tool to a preset angle, so that the locking screw 200 can be tightly connected with the locking nut 300, the inclined surface 220 of the fastening head 210 is tightly connected with one end of the expansion sleeve 100, and meanwhile, the limiting ring 320 can be tightly connected with the other end of the expansion sleeve 100.

The following is the installation process for installing the expansion nut 300 in a wall:

the locking screw 200 is inserted into the expansion shell 100, the locking nut 300 is inserted into the expansion shell 100, and the locking screw 200 is threadedly coupled to the screw hole 310 of the locking nut 300 until the inclined surface 220 of the fastening head 210 abuts against one end of the expansion sleeve 100, the stopper ring 320 abuts against the other end of the expansion sleeve 100, at the same time, one positioning strip 221 is fitted into the positioning notch 120, the other positioning strip 221 is fitted into the expansion gap 110, and thereafter, it is required to insert the expansion screw 300 into the wall body, insert a tool corresponding to the rotation hole 321 into the rotation hole 321, and rotate the tool, because the locking screw 200 is inserted into the corresponding positioning notch 120 or the expansion gap through the two positioning strips 221, so that the locking screw 200 can continue to move into the locking nut 300, thereby enabling the inclined surface 220 of the fastening head 210 to be tightly coupled to one end of the expansion sleeve 100 and enabling the stopper ring 320 to be tightly coupled to the other end of the expansion sleeve 100; meanwhile, the inclined surface 220 is continuously embedded into the expansion sleeve 100, and the side surface of the expansion sleeve 100 is provided with the expansion gap 110, so that the diameter of the expansion sleeve 100 is increased when the inclined surface 220 extrudes the expansion sleeve 100, the anti-falling piece 140 can be clamped in a wall body, and the probability that the expansion screw sleeve 300 falls off from the wall body is reduced; after the expansion screw sleeve 300 is completely installed in the wall body, the external bolt (not shown) can be connected with the screw hole 310 through a screw thread, so that external objects can be stably installed on the wall body through the bolt (not shown) and the expansion screw sleeve 300.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The built-in inflation swivel nut of wall body, its characterized in that includes:

an expansion sleeve;

the locking screw is positioned and inserted in the expansion sleeve;

2. The built-in expansion screw sleeve of the wall body as claimed in claim 1, wherein a fastening head is provided at one end of the locking screw, and an inclined surface is provided at a side surface of the fastening head.

3. The wall built-in expansion screw sleeve as claimed in claim 2, wherein at least two positioning strips are arranged on the inclined surface.

4. The built-in expansion screw sleeve for the wall body as claimed in claim 1, wherein the expansion sleeve is provided with an expansion gap and a positioning notch.

5. The built-in expansion screw sleeve of the wall body as claimed in claim 1, wherein a reinforcing ring is arranged on the side surface of the expansion sleeve.

6. The expansion screw sleeve built in the wall body as claimed in claim 1, wherein the side surface of the expansion sleeve is provided with a plurality of anti-falling sheets in an annular array along the central axis thereof.

7. The built-in expansion screw sleeve for the wall body as claimed in claim 6, wherein a rotation hole is formed in the limiting ring, and the screw hole is communicated with the rotation hole.

8. The built-in expansion screw sleeve of the wall body as claimed in claim 7, wherein the cross section of the rotation hole can be a triangle or a quadrangle or a pentagon or a hexagon.