CN220846178U - Drill rod connecting assembly and tapping machine - Google Patents

Abstract

The application discloses a drill rod connecting assembly and a tapping machine. The positioning piece is penetrated through the positioning piece and is positioned in the entering groove in the connecting hole, the drill rod is pushed to the end with smaller width of the entering groove through the end with larger width of the entering groove, the positioning piece is pushed to be far away from the inserting end in the axial direction of the through hole, the elastic piece which is arranged in a telescopic way along the axial direction of the through hole is compressed, and the two ends of the elastic piece respectively act on the connecting sleeve and the inserting end. The locating piece moves to the limiting groove of the drill rod to accommodate the locating piece, the locating piece moves along the direction that the limiting groove extends to penetrate through the drill rod, the elastic piece resets the locating piece to the position where the limiting groove abuts against the surface of the locating piece, and the drill rod is fixed relative to the locating piece and the connecting sleeve. When the drill rod is removed, the drill rod is axially inserted into the inlet groove to be pulled out. In the process of disassembling and assembling the drill rod, only the drill rod is operated, and the positioning piece is not required to be inserted and pulled out from the connecting sleeve and the drill rod, so that the time and labor cost are reduced.

Description

Drill rod connecting assembly and tapping machine

Technical Field

The application belongs to the technical field of drill rod replacement, and particularly relates to a drill rod connecting assembly and a tapping machine.

Background

The tapping machine is special equipment for drilling a tap hole plugged by stemming, and is an important component of a blast furnace. The tapping machine comprises a driving element with a driving shaft, a connecting sleeve, a drill rod and a positioning pin. The driving shaft of the driving element is connected with one end of the connecting sleeve, the other end of the connecting sleeve is provided with a connecting hole, the drill rod is inserted into the connecting hole, and the positioning pin is sequentially inserted into the connecting sleeve and the drill rod to fix the connecting sleeve and the drill rod. The driving element drives the driving shaft to move, the driving shaft transmits power to the connecting sleeve and the drill rod fixed with the connecting sleeve, and one end of the drill rod, which is far away from the connecting sleeve, is controlled to work at a tap hole of the blast furnace. The drill rod is directly contacted with molten iron at the iron notch of the blast furnace, the drill rod can be subjected to high temperature at the iron notch and burning loss of the molten iron, and almost one drill rod can be damaged every time the iron notch is opened, so that the drill rod needs to be replaced frequently.

In the prior art, the drill rod is replaced by manual work, and the positioning pin for connecting the drill rod and the connecting sleeve is inserted and pulled by manual force so as to realize the connection and separation of the drill rod and the connecting sleeve. Because the locating pin is tightly connected with the connecting sleeve and the drill rod, the locating pin is manually inserted and pulled out, and the drill rod is required to be connected with the connecting sleeve, so that time and labor are wasted.

Disclosure of Invention

The application aims to solve the problems of time and labor waste in assembling and disassembling the drill rod at least to a certain extent. Therefore, the application provides a drill rod connecting assembly and a tapping machine.

The drill rod connecting assembly provided by the embodiment of the application comprises:

the connecting sleeve is provided with a through hole and a connecting hole for inserting the drill rod, and the through hole is communicated with the connecting hole and is arranged at an angle;

The positioning piece is provided with an insertion end and an abutting end, the insertion end is movably inserted into and extends out of the through hole, the width of the abutting end is larger than the diameter of the through hole,

The positioning piece is provided with an entering groove penetrating through the positioning piece and positioned in the connecting hole for the drill rod to enter, and the width of the entering groove is reduced in the direction which is close to the bottom of the connecting hole and is close to the insertion end;

The drill rod is slidably inserted into the connecting hole, and a limiting groove penetrating through the drill rod and used for propping against the surface of the positioning piece is formed;

The elastic piece is arranged along the axial extension of the through hole, and two ends of the elastic piece respectively act on the connecting sleeve and the insertion end.

Optionally, the entering groove is provided with a first end close to the bottom of the connecting hole and a second end far away from the bottom of the connecting hole, and the first end is attached to the peripheral wall of the drill rod.

Optionally, the width of the second end is twice the width of the first end.

Optionally, the positioning piece is provided with a guiding inclined plane facing the bottom of the connecting hole and communicated with the entering groove, and one end part with smaller width of the entering groove is positioned in the limiting groove.

Optionally, the cross section of the limiting groove is trapezoid with wide upper part and small lower part.

Optionally, the drill rod connection assembly further comprises:

the limiting piece is connected with the insertion end and is provided with at least two limiting ends perpendicular to the stretching direction of the elastic piece, and one end of the elastic piece abuts against the limiting piece.

Optionally, the limiting piece is a limiting pin inserted and connected to the insertion end, and two ends of the limiting pin form the limiting end.

Optionally, the drill rod connection assembly further comprises:

And the gasket is sleeved at the insertion end and positioned between the elastic piece and the limiting piece, and one end of the elastic piece is abutted against the limiting piece through the gasket.

The application provides a tapping machine, comprising:

The drill rod connecting assembly is characterized in that the positioning piece is provided with a guide inclined plane which is positioned in the connecting hole and faces to the bottom of the connecting hole;

and the driving element is provided with a driving shaft, and the driving shaft is connected with one end of the connecting sleeve, which is far away from the connecting hole.

Optionally, the tapping machine further comprises an insulating clamping hand placed on the driving element and used for clamping the drill rod to axially move.

The embodiment of the application has at least the following beneficial effects:

In the drill rod connecting assembly, the connecting hole of the connecting sleeve is slidably inserted into the drill rod, and the through hole communicated with the connecting hole provides installation of the positioning piece. The inserting end of the locating piece is inserted into the through hole and extends out of the through hole to be matched with the elastic piece, the locating piece can be connected to the connecting sleeve, the width of the abutting end of the locating piece is larger than the diameter of the through hole, then the abutting end of the locating piece cannot enter the through hole, and the abutting limiting effect can be achieved. The locating piece is gone up and runs through the locating piece and is located the entering groove of connecting hole can provide the space of entering connecting hole for the drill rod, the width of entering groove is being close to the bottom of connecting hole and is close to the direction of inserting the end and reduce, then the drill rod promotes to the less one end of entering groove width through the great one end of entering groove width, promote the locating piece in the axial of through-hole and keep away from the inserting the end, the butt end of locating piece moves to and offsets with the adapter sleeve, can compress simultaneously and set up and both ends act on the elastic component of adapter sleeve and inserting the end respectively along the axial of through-hole. The locating piece moves to the limiting groove of the drill rod to accommodate the locating piece, the drill rod and the locating piece are not interacted in the axial direction of the through hole, the locating piece moves along the direction that the limiting groove extends to penetrate the drill rod under the resetting action of the compressed elastic piece, the elastic piece pushes the locating piece to reset until the limiting groove abuts against the surface of the locating piece, the drill rod is fixed relative to the locating piece and the connecting sleeve, and the installation of the drill rod is completed. When the drill rod needs to be removed, the elastic piece can be manually compressed or the positioning piece can be manually pushed along the axial direction of the through hole, so that the drill rod can be axially inserted into the entering groove to be pulled out. In the process of disassembling and assembling the drill rod, only the drill rod is required to be controlled, and the positioning piece is not required to be inserted and pulled out from the connecting sleeve and the drill rod, so that the time and labor required to be consumed in the process of installing the drill rod are reduced.

Drawings

FIG. 1 is a schematic view of a drill rod connection assembly according to the present application.

FIG. 2 is a cross-sectional view of the drill rod connection assembly of FIG. 1, in accordance with the present application.

Fig. 3 is a front view of a positioning member provided by the present application.

Fig. 4 is a left side view of the positioning member provided by the present application.

Fig. 5 is a right side view of the positioning member according to the present application.

Fig. 6 is a simplified schematic structure of the tapping machine according to the present application.

Reference numerals illustrate: 1. connecting sleeves; 11. a through hole; 12. a connection hole; 2. a positioning piece; 21. an insertion end; 22. an abutment end; 23. entering a groove; 231. a first end; 232. a second end; 233. a first side; 234. a second side; 2341. entering a section; 2342. a guide section; 24. a guide slope; 25. an abutting plate; 26. an insertion plate; 3. a drill rod; 31. a limit groove; 4. an elastic member; 5. a limiting piece; 6. a gasket; 10. a driving element; 101. a drive shaft; 20. insulating grip.

Detailed Description

In order to make the present application more clearly understood by those skilled in the art, the following detailed description of the technical scheme of the present application will be given by way of specific examples with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a drill rod connection assembly provided by the present application, fig. 2 is a cross-sectional view of the drill rod connection assembly in fig. 1 provided by the present application, and in combination with fig. 1 and fig. 2, a drill rod connection assembly provided by an embodiment of the present application includes:

The connecting sleeve 1 is provided with a through hole 11 and a connecting hole 12 for inserting the drill rod 3, and the through hole 11 is communicated with the connecting hole 12 and is arranged at an angle.

The positioning piece 2 is provided with an insertion end 21 and an abutting end 22, wherein the insertion end 21 is movably inserted into and extends out of the through hole 11, and the width of the abutting end 22 is larger than the diameter of the through hole 11. The positioning member 2 is provided with an entry slot 23 penetrating the positioning member 2 in the connecting hole 12 into which the shank 3 enters, the width of the entry slot 23 decreasing in a direction approaching the bottom of the connecting hole 12 and approaching the insertion end 21.

The drill rod 3 is slidably inserted into the connecting hole 12, and a limiting groove 31 penetrating the drill rod 3 and abutting against the surface of the positioning piece 2 is formed.

The elastic member 4 is telescopically arranged along the axial direction of the through hole 11, and both ends of the elastic member respectively act on the connecting sleeve 1 and the insertion end 21.

In the drill rod 3 connection assembly, the connection hole 12 of the connection sleeve 1 is slidably inserted into the drill rod 3, and the through hole 11 communicating with the connection hole 12 provides for mounting of the positioning member 2. The inserting end 21 of the positioning piece 2 is inserted into the through hole 11 and extends out of the through hole 11 to be matched with the elastic piece 4, the positioning piece 2 can be connected to the connecting sleeve 1, the width of the abutting end 22 of the positioning piece 2 is larger than the diameter of the through hole 11, and then the abutting end 22 of the positioning piece 2 cannot enter the through hole 11, so that the abutting limiting effect can be achieved. The locating piece 2 is penetrated the locating piece 2 and is located the entering groove 23 of connecting hole 12 can provide the space of entering connecting hole 12 for drill rod 3, entering groove 23's width is being close to the bottom of connecting hole 12 and is close to the direction of inserting end 21 and reducing, then drill rod 3 promotes the less one end of entering groove 23 width through the great one end of entering groove 23 width, promote locating piece 2 in the axial of through-hole 11 and keep away from inserting end 21, the butt end 22 of locating piece 2 moves to and offsets with adapter sleeve 1, simultaneously can compress the flexible piece 4 that sets up and both ends are acted on adapter sleeve 1 and inserting end 21 respectively along the axial of through-hole 11. The locating piece 2 moves to the limit groove 31 of the drill rod 3 to accommodate the locating piece 2, the drill rod 3 and the locating piece 2 do not interact with each other in the axial direction of the through hole 11, then under the reset action of the compressed elastic piece 4, the locating piece 2 moves along the direction that the limit groove 31 extends to penetrate the drill rod 3, the elastic piece 4 pushes the locating piece 2 to reset until the limit groove 31 abuts against the surface of the locating piece 2, the drill rod 3 is fixed relative to the locating piece 2 and the connecting sleeve 1, and the installation of the drill rod 3 is completed. When the drill rod 3 needs to be removed, the elastic piece 4 can be manually compressed or the positioning piece 2 can be manually pushed along the axial direction of the through hole 11, so that the drill rod 3 can be axially inserted into the entering groove 23 to extract the drill rod 3 according to the reverse operation. In the process of disassembling and assembling the drill rod 3, only the drill rod 3 is required to be controlled, and the positioning piece 2 is not required to be inserted and pulled out from the connecting sleeve 1 and the drill rod 3, so that the time and the labor required to be consumed in the process of installing the drill rod 3 are reduced.

The surface of the positioning member 2 does not include the wall of the entry groove 23 and the through hole 11.

In some embodiments of the present application, the through hole 11 and the connecting hole 12 may be disposed perpendicular to each other. The drill rod 3 is convenient to prepare and easy to assemble and disassemble the positioning piece 2.

In some embodiments of the present application, the elastic member 4 may be a spring that is sleeved on the positioning member 2. The telescopic effect can be conveniently realized.

In some embodiments provided by the present application, the elastic member 4 may also include other elastic materials that are sleeved on the positioning member 2 in a ring shape and have an elastic effect. The application is not limited in this regard.

Fig. 3 is a front view of the positioning member according to the present application, fig. 4 is a left side view of the positioning member according to the present application, fig. 5 is a right side view of the positioning member according to the present application, and referring to fig. 1 to 5, in some embodiments of the present application, the entry slot 23 is provided with a first end 231 near the bottom of the connection hole 12 and a second end 232 far from the bottom of the connection hole 12, and the first end 231 is attached to the peripheral wall of the drill rod 3.

The entering groove 23 is provided with a first end 231 close to the bottom of the connecting hole 12 and a second end 232 far away from the bottom of the connecting hole 12, the first end 231 is attached to the peripheral wall of the drill rod 3, and the first end 231 can play a limiting and guiding role on the drill rod 3, so that the drill rod 3 is convenient to install. And the first end 231 is attached to the peripheral wall of the drill rod 3, so that no large gap exists between the first end 231 and the drill rod 3 in the axial direction of the through hole 11, and when the drill rod 3 moves to the position where the limiting groove 31 can accommodate the positioning piece 2, the positioning piece 2 can quickly enter the limiting groove 31. The disassembly and assembly efficiency of the drill rod 3 is improved.

In some embodiments provided by the present application, the width of the second end 232 is twice the width of the first end 231.

The second end 232 has a width twice that of the first end 231, so that the drill rod 3 can be easily inserted into the slot 23, and the moving range of pushing the positioning member 2 in the axial direction of the through hole 11 is also proper. The disassembly and assembly efficiency of the drill rod 3 is improved.

In some embodiments of the present application, the access slot 23 is provided with a first side 233 and a second side 234 intersecting the surface of the positioning member 2, the first side 233 being parallel to the axial direction of the connecting hole 12 and close to the insertion end 21, and the second side 234 being close to the abutment end 22 and being provided with an access section 2341 and a guide section 2342 connected along the axial extension of the connecting hole 12. And the distance between the entry segment 2341 and the first side 233 is gradually reduced in a direction in which the opening of the connection hole 12 extends to the bottom of the connection hole 12, and the distance between the guide segment 2342 and the first side 233 is unchanged.

The first side 233 and the second side 234 are provided on the entering groove 23, so that stable guiding of the drill rod 3 can be realized, and meanwhile, when the drill rod 3 is inserted into the entering groove 23, stable pushing of the positioning piece 2 is realized in the axial direction of the through hole 11, thereby being beneficial to improving the inserting efficiency of the drill rod 3.

In some embodiments provided by the present application, the first side 233 is parallel to the axial direction of the connection hole 12 and near the insertion end 21, and the second side 234 is near the abutment end 22, and the distance between the second side 234 and the first side 233 may also decrease gradually in the direction in which the opening of the connection hole 12 extends to the bottom of the connection hole 12. It is also possible to realize stable pushing of the positioning member 2, to which the present application is not limited.

Referring to fig. 1 to 5, in some embodiments of the present application, the positioning member 2 is provided with a guiding inclined surface 24 facing the bottom of the connecting hole 12 and communicating with the entering groove 23, and the smaller end portion of the entering groove 23 is located in the limiting groove 31.

The guide bevel 24 may facilitate the movement of the shank 3 out of the connection hole 12. The guiding inclined plane 24 is communicated with the entering groove 23, and one end part with smaller width of the entering groove 23 is positioned in the limiting groove 31 of the drill rod 3, so that when the drill rod 3 moves from the bottom to the opening of the connecting hole 12 along the axial direction of the connecting hole 12, the limiting groove 31 of the drill rod 3 is contacted with the guiding inclined plane 24 to push the positioning piece 2. The elastic member 4 is compressed by moving the positioning member 2, and the drill rod 3 can push the guide inclined surface 24 and then be inserted into the groove 23, pass through the groove 23 and be separated from the connecting hole 12 of the connecting sleeve 1. The difficulty of separating the drill rod 3 from the connecting sleeve 1 can be reduced, and the time and labor cost for dismantling the drill rod 3 can be reduced. And because the connecting sleeve 1 is connected with the driving shaft 101 of the tapping machine in actual use, the driving shaft 101 of the tapping machine applies rotating power to the connecting sleeve 1, under the action of inertia, the positioning piece 2 can move along the axial direction of the through hole 11, the elastic piece 4 is compressed, so that the entering groove 23 moves to the position where the drill rod 3 can be inserted into the entering groove 23, and then the drill rod 3 is applied with the acting force along the axial direction of the connecting hole 12, so that the drill rod 3 can be conveniently separated from the connecting sleeve 1. And the guide inclined surface 24 can also be used as a sign to avoid that the guide inclined surface 24 faces the opening side of the connecting hole 12 after the positioning member 2 is mounted.

In some embodiments, the positioning member 2 may include an abutment plate 25 and an insertion plate 26 perpendicularly connected to the plate surface of the abutment plate 25. The plate surface of the abutting plate 25 connected with the inserting plate 26 is an abutting end 22, one end of the inserting plate 26 far away from the abutting plate 25 is an inserting end 21, and the guiding inclined surface 24 and the entering groove 23 are arranged on the inserting plate 26. The positioning piece 2 adopts the structure, is simple and easy to prepare, and is beneficial to reducing the preparation cost.

In some embodiments provided by the application, the cross section of the limiting groove 31 is trapezoid with a wide upper part and a small lower part. The drill rod 3 can be conveniently moved relative to the guide inclined plane 24 through the limit groove 31 while the cooperation between the drill rod 3 and the positioning piece 2 can be ensured.

Referring to fig. 1, in some embodiments of the present application, the drill rod 3 connection assembly further includes:

The limiting piece 5, the limiting piece 5 is connected with the insertion end 21 and is provided with at least two limiting ends perpendicular to the extending and contracting direction of the elastic piece 4, and one end of the elastic piece 4 abuts against the limiting piece 5.

The addition of the limiting piece 5 can facilitate the installation and limiting of the elastic piece 4.

In some embodiments provided by the present application, the limiting member 5 is a limiting pin inserted and connected to the insertion end 21, and two ends of the limiting pin form limiting ends. The limiting piece 5 is a limiting pin, is easy to prepare and is convenient to realize connection with the positioning piece 2.

When the limiting member 5 is a limiting pin, the insertion end 21 may be provided with a through insertion hole corresponding to the limiting pin. And the connection and the matching between the limiting pin and the limiting pin are convenient to realize.

In some embodiments of the present application, the limiting member 5 may also be provided as an annular plate that is sleeved on the insertion end 21 of the positioning member 2. The fitting with the elastic member 4 can also be realized. The application is not limited in this regard.

In some embodiments of the present application, the drill rod 3 connection assembly further comprises:

and a gasket 6 sleeved at the insertion end 21 and positioned between the elastic piece 4 and the limiting piece 5, wherein one end of the elastic piece 4 is abutted against the limiting piece 5 through the gasket 6. The gasket 6 can reduce the impact between the elastic piece 4 and the limiting piece 5, and is convenient for replacement and maintenance.

Fig. 6 is a simplified schematic structural diagram of a tapping machine according to the present application, and referring to fig. 6, the present application provides a tapping machine comprising:

The drill rod 3 connecting assembly as described above, the positioning piece 2 is provided with a guiding inclined plane 24 which is positioned in the connecting hole 12 and faces the bottom of the connecting hole 12; a drive element 10 of a drive shaft 101 is provided, the drive shaft 101 being connected to the end of the connecting sleeve 1 remote from the connecting bore 12.

The specific effects of the rod 3 connection assembly are as described above and will not be described here. The guide bevel 24 may facilitate the movement of the shank 3 out of the connection hole 12. The guiding inclined plane 24 is communicated with the entering groove 23, and one end part with smaller width of the entering groove 23 is positioned in the limiting groove 31 of the drill rod 3, so that when the drill rod 3 moves from the bottom to the opening of the connecting hole 12 along the axial direction of the connecting hole 12, the limiting groove 31 of the drill rod 3 is contacted with the guiding inclined plane 24 to push the positioning piece 2. The elastic member 4 is compressed by moving the positioning member 2, and the drill rod 3 can push the guide inclined surface 24 and then be inserted into the groove 23, pass through the groove 23 and be separated from the connecting hole 12 of the connecting sleeve 1. The difficulty of separating the drill rod 3 from the connecting sleeve 1 is reduced, and the time and labor cost for dismantling the drill rod 3 are reduced. The connecting sleeve 1 is connected with the driving shaft 101 of the driving element 10 of the tapping machine, the driving shaft 101 of the tapping machine applies rotating power to the connecting sleeve 1, the positioning piece 2 can move along the axial direction of the through hole 11 under the action of inertia, the elastic piece 4 is compressed, so that the entering groove 23 moves to the position where the drill rod 3 can be inserted into the entering groove 23, and the drill rod 3 can be conveniently separated from the connecting sleeve 1 by applying the axial acting force along the connecting hole 12 to the drill rod 3.

In some embodiments of the present application, when the tapping machine further comprises the function of a rock drill, the driving shaft 101 of the driving element 10 may apply a rotational force to the connecting sleeve 1, and after the drill rod 3 is inserted into the access slot 23, the driving shaft 101 may also apply a force to the connecting sleeve 1 in the axial direction of the connection hole 12, so that the drill rod 3 inserted into the access slot 23 is separated from the connection hole 12. Realizing the full-automatic disassembly of the drill rod 3.

In some embodiments of the application, the tapping machine further comprises an insulating clamping hand 20 placed on the driving element 10 and adapted to clamp the axial movement of the drill rod 3. The drill rod 3 can be operated along the axial direction of the connecting hole 12 through the insulating clamping hand 20, so that the safety of dismounting the drill rod 3 is improved.

In some embodiments of the application, the axial movement of the shank 3 may also be achieved by a robot. The application is not limited in this regard.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A drill rod connection assembly, comprising:

the connecting sleeve is provided with a through hole and a connecting hole for inserting the drill rod, and the through hole is communicated with the connecting hole and is arranged at an angle;

The positioning piece is provided with an insertion end and an abutting end, the insertion end is movably inserted into and extends out of the through hole, the width of the abutting end is larger than the diameter of the through hole,

The positioning piece is provided with an entering groove penetrating through the positioning piece and positioned in the connecting hole for the drill rod to enter, and the width of the entering groove is reduced in the direction which is close to the bottom of the connecting hole and is close to the insertion end;

The drill rod is slidably inserted into the connecting hole, and a limiting groove penetrating through the drill rod and used for propping against the surface of the positioning piece is formed;

The elastic piece is arranged along the axial extension of the through hole, and two ends of the elastic piece respectively act on the connecting sleeve and the insertion end.

2. The drill rod connection assembly of claim 1, wherein the access slot is provided with a first end proximate to the bottom of the connection hole and a second end distal from the bottom of the connection hole, the first end conforming to the peripheral wall of the drill rod.

3. The drill rod connection assembly of claim 2, wherein the second end has a width twice the width of the first end.

4. A drill rod connection assembly according to any one of claims 1 to 3, wherein the locating member is provided with a guide inclined surface facing the bottom of the connection hole and communicating with the entry slot, and the smaller width end portion of the entry slot is located in the limit slot.

5. The drill rod connection assembly according to claim 4, wherein the cross section of the limiting groove is trapezoid with a wide upper part and a small lower part.

6. A drill rod connection assembly according to any one of claims 1 to 3, further comprising:

the limiting piece is connected with the insertion end and is provided with at least two limiting ends perpendicular to the stretching direction of the elastic piece, and one end of the elastic piece abuts against the limiting piece.

7. The drill rod connection assembly of claim 6, wherein the limiting member is a limiting pin inserted and connected to the insertion end, and two ends of the limiting pin form the limiting end.

8. The drill rod connection assembly of claim 6, further comprising:

And the gasket is sleeved at the insertion end and positioned between the elastic piece and the limiting piece, and one end of the elastic piece is abutted against the limiting piece through the gasket.

9. A tapping machine, characterized by comprising:

The drill rod connection assembly of any one of claims 1 to 8, the positioning member being provided with a guide ramp located within the connection bore and facing the bottom of the connection bore;

and the driving element is provided with a driving shaft, and the driving shaft is connected with one end of the connecting sleeve, which is far away from the connecting hole.

10. The tapping machine of claim 9, further comprising an insulating clamping hand disposed on the drive member for clamping the axial movement of the drill rod.