CN211993602U

CN211993602U - Punching tool

Info

Publication number: CN211993602U
Application number: CN201922448481.3U
Authority: CN
Inventors: 田玉岐
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-24
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a punching tool. Comprises a handle part and a tool part arranged at the front end of the handle part, wherein the tool part comprises a cylindrical shell and a core part arranged in the cylindrical shell; wherein, the inner surface of the front section of the cylindrical shell is in an inverted cone shape; the core comprises a core handle and an inverted conical core head arranged on the core handle; the side wall section of the front end of the cylinder body is in an inverted cone shape matched with the core head; more than two through holes are arranged at the position of the front section of the cylindrical shell close to the opening, a drill bit is arranged in each through hole, the tail part of the drill bit is abutted against the handle part of the core part, and the bit part of the drill bit faces the outside of the shell; a spring is disposed between the shank of the core and the bottom of the cylindrical housing. The utility model discloses utilize the instrument of punching to utilize back taper core and barrel, outwards release the drill bit sword gradually, make the back taper from the hole with in the wall body to be favorable to taking place deformation with the outer iron sheet pipe (steel pipe) afterbody of expansion screw, thereby it is more firm to make the expansion screw fixed.

Description

Punching tool

Technical Field

The utility model relates to a punching tool.

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, and the other end of the screw is provided with conicity. The wall is covered by an iron cylinder (steel pipe is provided), a plurality of cuts are arranged on one half of the iron cylinder (steel pipe), the iron cylinder (steel pipe) and the cuts are plugged into a straight hole drilled on the wall together, then a nut is locked, the nut pulls a screw outwards to pull the taper into the iron cylinder, and the iron cylinder is expanded and is tightly fixed on the wall.

However, in this structure, a straight hole is drilled on the wall, and the iron cylinder is also a straight cylinder, so that the iron cylinder is less deformed, and thus the metal expansion screw is easily separated from the straight cylinder on the wall, so that the fixation is not very reliable, and the metal expansion screw may be loosened if the load is greatly vibrated, such as a ceiling fan.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model aims to provide a punching tool.

In order to achieve the above object, the punching tool of the present invention comprises a handle and a tool part disposed at the front end of the handle, wherein the tool part comprises a cylindrical housing and a core part disposed in the cylindrical housing; wherein, the inner surface of the front section of the cylindrical shell is in an inverted cone shape;

the core comprises a core handle and an inverted conical core head arranged on the core handle; the diameter of the core handle is matched with the inner diameter of the barrel, the diameter of the large-diameter end of the core head is matched with the outer diameter of the barrel, and the side wall section of the front end of the barrel is in an inverted cone shape matched with the core head;

more than two through holes are arranged at the position of the front section of the cylindrical shell close to the opening, a drill bit is arranged in each through hole, the tail part of the drill bit is abutted against the handle part of the core part, and the bit part of the drill bit faces the outside of the shell;

a spring is disposed between the shank of the core and the bottom of the cylindrical housing.

Further, a ball is provided at the head front end of the core.

Further, the shank of the core is provided with a core drop-off prevention mechanism.

The utility model discloses utilize the instrument of punching to utilize back taper core and barrel, outwards release the drill bit sword gradually, make the back taper from the hole with in the wall body to be favorable to taking place deformation with the outer iron sheet pipe (steel pipe) afterbody of expansion screw, thereby it is more firm to make the expansion screw fixed.

Drawings

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

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 3 is a schematic view of the core of fig. 2 in a compressed configuration.

Fig. 4 is a schematic view of the action of the punching tool of the present invention entering the wall hole 1.

Fig. 5 is a schematic view of the action of the punching tool of the present invention entering the wall hole 2.

Fig. 6 is the schematic diagram of the action taken out from the manhole of the punching tool of the present invention 2.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 6, the punching tool of the present invention includes a shank 1 and a tool portion disposed at a front end of the shank, the tool portion including a cylindrical housing 21 and a core 22 disposed in the cylindrical housing; wherein, the inner surface of the front section of the cylindrical shell is in an inverted cone shape;

the core comprises a core shank 221 and an inverted conical core head 222 arranged on the core shank; the diameter of the core handle is matched with the inner diameter of the barrel, the diameter of the large-diameter end of the core head is matched with the outer diameter of the barrel, and the side wall section of the front end of the barrel is in an inverted cone shape matched with the core head;

more than two through holes are arranged at the position of the front section of the cylindrical shell close to the opening, a drill bit 4 is arranged in each through hole, the tail part of the drill bit is abutted against the handle part of the core part, and the bit part of the drill bit faces the outside of the shell;

a spring 3 is provided between the shank of the core and the bottom of the cylindrical housing.

As a further improvement of the present invention, in order to prevent the front end of the core from rubbing against the wall and causing overheating, a ball or a rotating structure 5 is provided at the front end of the head of the core, as shown in fig. 1, the rotating structure 5 includes: a circular concave hole is formed in the upper portion of the inverted conical core head 222, and a bearing is arranged in the concave hole; a top plate with a T-shaped section is arranged in the bearing.

As a further improvement of the present invention, in order to prevent the core from falling into the wall hole when the core is taken out of the wall hole, a core disengagement preventing mechanism 6 is provided at the shank. As shown in fig. 1, the anti-drop mechanism 6 is provided with an extension rod under the core part, as long as the length of the core part plus the extension rod is greater than that of the wall hole; as shown in fig. 2, an annular recess may be provided in the shank of the core, and a stopper screw may be provided in the side wall of the tool barrel corresponding to the annular recess, so long as the height of the annular recess corresponds to the height of the reverse tapered core 222.

Claims

1. A punching tool is characterized by comprising a handle part and a tool part arranged at the front end of the handle part, wherein the tool part comprises a cylindrical shell and a core part arranged in the cylindrical shell; wherein, the inner surface of the front section of the cylindrical shell is in an inverted cone shape;

2. The piercing tool of claim 1, wherein a ball is disposed at a leading end of the head of the core.

3. The piercing tool of claim 1, wherein the shank of the core is provided with a core retaining mechanism.

4. The perforating tool of claim 3 wherein the retaining mechanism comprises: the shank of the core is provided with an annular recess, and the side wall of the tool barrel is provided with a limit screw corresponding to the annular recess, so long as the height of the annular recess is equivalent to that of the inverted conical core head.