CN219691936U - Can dismantle repeatedly usable's expansion bolts - Google Patents

Abstract

The utility model provides a detachable and reusable expansion bolt which comprises an inner screw rod, an expansion pipe, a gasket, a screw cap and an outer screw rod, wherein one end of the inner screw rod is coaxially connected with a conical pull head, the other end of the inner screw rod is in threaded connection with the outer screw rod, the expansion pipe is sleeved on the inner screw rod, one end of the expansion pipe, which is close to the pull head, is provided with an axial groove, the screw cap is connected to the movable end of the outer screw rod, and the gasket is positioned between the expansion pipe and the screw cap. The utility model has the effect of realizing complete extraction and repeated use of the expansion bolt.

Description

Can dismantle repeatedly usable's expansion bolts

Technical Field

The utility model relates to the technical field of expansion bolts, in particular to a detachable and reusable expansion bolt.

Background

The existing expansion bolts can well play a role in fixing, and bring great convenience to production work; however, it is difficult to remove the expansion bolts during the disassembly process, and most of the expansion bolts protruding from the building are removed by using an angle grinder. This method not only wastes materials, but also damages the structural properties of the building after the expansion bolts left inside the building are corroded, affecting the service life of the building.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a detachable and reusable expansion bolt, which solves the problems that the expansion bolt in the prior art cannot be completely taken out after being installed and the structural property of a building is easy to damage.

According to the embodiment of the utility model, the detachable and reusable expansion bolt comprises an inner screw rod, an expansion pipe, a gasket, a nut and an outer screw rod, wherein one end of the inner screw rod is coaxially connected with a conical pull head, the other end of the inner screw rod is in threaded connection with the outer screw rod, the expansion pipe is sleeved on the inner screw rod, one end, close to the pull head, of the expansion pipe is provided with an axial groove, the nut is connected with the movable end of the outer screw rod, and the gasket is positioned between the expansion pipe and the nut.

Preferably, the connection ends of the inner screw and the outer screw are respectively provided with a convex section and a threaded hole.

Preferably, a radial protrusion is arranged on the outer wall of one end of the inner screw connected with the pull head, and the radial protrusion is positioned in the axial groove of the expansion pipe.

Preferably, the threads at two ends of the outer screw are identical in rotation direction.

Preferably, the movable end of the outer screw is provided with a radial through hole.

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

the outer screw and the inner screw are connected through threads to form a finished screw, the screw with the expansion pipe is sleeved on the screw, a gasket is installed, the assembled screw and the expansion pipe are placed into the opening, the opening is shielded by the gasket, and the screw is pulled outwards, so that one end of the expansion pipe with an axial groove is opened and expanded into a whole with a building; when the expansion pipe is disassembled, the outer screw is unscrewed, the inner screw is knocked through the outer screw, so that the inner screw is separated from the expansion pipe, the expansion pipe is taken out by using a gap after the outer screw is taken out, and finally the inner screw is taken out, so that recovery is completed; the problem that the residual part damages the building structure when the expansion bolts are removed is solved through the removable expansion bolts, and the recyclable expansion bolts reduce the use cost.

Drawings

Fig. 1 is a schematic view of a mounting structure according to an embodiment of the present utility model.

Fig. 2 is a burst map of an embodiment of the utility model.

In the above figures: 1. an outer screw; 2. a screw cap; 3. a gasket; 4. an expansion tube; 5. an inner screw; 6. and (5) mounting holes.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the purpose of removing and recycling the expansion bolts is achieved. The utility model provides a detachable and reusable expansion bolt which comprises an inner screw 5, an expansion pipe 4, a gasket 3, a nut 2 and an outer screw 1, wherein one end of the inner screw 5 is coaxially connected with a conical pull head, the other end of the inner screw is in threaded connection with the outer screw 1, the expansion pipe 4 is sleeved on the inner screw 5, one end of the expansion pipe 4, which is close to the pull head, is provided with an axial groove, the nut 2 is connected with the movable end of the outer screw 1, and the gasket 3 is positioned between the expansion pipe 4 and the nut 2.

The method comprises the steps of drilling a mounting hole 6 corresponding to the size of an expansion bolt on a building by an electric drill, connecting an outer screw 1 with an inner screw 5 through threads to form a complete screw, tightly combining the complete screw with the inner screw, jointly stressed, sleeving an expansion pipe 4 on the screw, integrally placing the expansion pipe 4 into the mounting hole 6, sleeving a gasket 3 on the outer screw 1, covering the mounting hole 6 by the gasket 3, connecting the movable end of the outer screw 1 by using the threaded pipe, pulling the outer screw 1 by using the threaded pipe, driving the inner screw 5 to move outwards, extruding the end part of the expansion pipe 4 with an axial groove by using a pull head at the end part of the inner screw 5, expanding the end part of the expansion pipe 4 into a whole with the building, and finally screwing a nut 2 to finish the installation of the expansion bolt.

When the expansion bolt is removed, the screw cap 2 and the gasket 3 are sequentially taken out, the outer screw rod 1 is reversely rotated, the outer screw rod 1 is separated from the inner screw rod 5, the outer screw rod 1 is used for knocking the inner screw rod 5, the inner screw rod 5 is separated from the expansion pipe 4, after the outer screw rod 1 is taken out, the expansion pipe 4 is taken out from the mounting hole 6 by using the nipper pliers through the mounting gap of the outer screw rod 1, and finally the inner screw rod 5 is taken out, so that the expansion bolt is removed.

As shown in fig. 2, the inner screw 5 is conveniently knocked so that the inner screw 5 is separated from the expansion pipe 4. The connecting ends of the inner screw 5 and the outer screw 1 are respectively provided with a convex section and a threaded hole. A small screw is arranged at the end part of the inner screw 5, and the outer screw 1 or other axial structures can be adopted when the inner screw 5 is knocked; compared with the arrangement of the threaded hole at the end part of the inner screw 5, the inner screw 5 can be accurately knocked.

As shown in fig. 1 and 2, in order to avoid that the inner screw 5 is in a separated state from the expansion pipe 4 during the rotation of the separation outer screw 1 and the inner screw 5, the inner screw 5 rotates with the outer screw 1, so that the outer screw 1 cannot be separated from the inner screw 5. The outer wall of one end of the inner screw 5 connected with the pull head is provided with a radial bulge, and the radial bulge is positioned in the axial groove of the expansion pipe 4. When the expansion pipe 4 is fixed, the inner screw 5 is pulled to move, the axial bulge on the inner screw 5 slides along the axial groove and is fixed, and the rotation of the inner screw 5 is limited through the axial bulge and the axial groove.

As a preferred embodiment of the present utility model, in order to prevent the separation of the inner screw 5 and the outer screw 1 during the tightening of the nut 2, the structural strength of the screw portion of the expansion bolt is lowered. The threads at the two ends of the outer screw 1 are identical in rotation direction. When the nut 2 is screwed, the applied force is the force for continuously screwing the outer screw 1 and the inner screw 5, so that the tight connection of the outer screw 1 and the inner screw 5 can be ensured.

As shown in fig. 1 and 2, the outer screw 1 is pulled for convenience in fixing the expansion bolts. The movable end of the outer screw 1 is provided with a radial through hole. An iron rod is penetrated into the through hole of the outer screw rod 1, so that the pulling force is conveniently applied.

Claims (5)

1. The utility model provides a can dismantle used repeatedly's expansion bolts which characterized in that: including interior screw rod (5), expansion pipe (4), gasket (3), nut (2) and outer screw rod (1), the one end coaxial coupling conical pull head of interior screw rod (5), other end threaded connection outer screw rod (1), expansion pipe (4) suit is on interior screw rod (5), and the axial groove is seted up near the one end of pull head to expansion pipe (4), nut (2) are connected in outer screw rod (1) expansion end, and gasket (3) are located between expansion pipe (4) and nut (2).

2. A removable reusable expansion bolt as claimed in claim 1, wherein: the connecting ends of the inner screw (5) and the outer screw (1) are respectively provided with a convex section and a threaded hole.

3. A removable reusable expansion bolt as claimed in claim 1, wherein: the inner screw (5) is connected with the outer wall of one end of the pull head, radial protrusions are arranged on the outer wall of one end of the pull head, and the radial protrusions are located in the axial grooves of the expansion pipe (4).

4. A removable reusable expansion bolt as claimed in claim 1, wherein: the threads at two ends of the outer screw rod (1) are identical in rotation direction.

5. A removable reusable expansion bolt as claimed in claim 4, wherein: the movable end of the outer screw (1) is provided with a radial through hole.