Tapping device assembly

Abstract

The utility model discloses a tapper assembly, which comprises a drill bit, the drill bit is provided with a drilling part and an abutting part, the drilling part at least comprises a central positioning tooth, slotting teeth extending in the radial direction and arc-shaped chip removal surfaces located on the two sides of the slotting teeth, and the abutting part is formed by extending outwards in the radial direction from the outer wall of the drilling part; and the connecting part is connected with the drill bit and located on the side where the abutting part is located, and the end, away from the drill bit, of the connecting part is provided with a thread switching section. The abutting portion plays a limiting role, an operator can achieve the target drilling depth at a time, and operation is more convenient and faster; chippings generated by drilling can be quickly discharged outwards through the chip removal surface, so that the drilling efficiency is improved; the connecting part can be used in cooperation with an existing machine in the market through the first adapter or the second adapter, disassembly and assembly are convenient, and the application range is wider; drilling is more accurate, and the drilling efficiency is higher; the overall structure is stable and the use stability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of hole-opening drill bits, in particular to a hole-opening device component. Background Art

[0002] Chinese patent CN218659647 U discloses a "high-strength hole-opening drill bit", which includes a drill bit and a hexagonal pin shaft, and is provided with slotted teeth, center positioning teeth, slotted protrusions, and edge teeth. The drill bit has high strength and high working stability. However, it cannot locate the drilling depth during the drilling operation, and its assembly adaptability with external power is relatively low. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a hole opener assembly, which can control the drilling depth and remove chips more smoothly.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a hole opener assembly, comprising:

[0005] A drill bit, comprising a drilling portion and an abutment portion, wherein the drilling portion at least comprises a central positioning tooth, radially extending slotted teeth, and arc-shaped chip removal surfaces located on both sides of the slotted teeth, and the abutment portion is formed by radially extending outward from an outer wall of the drilling portion;

[0006] The connecting portion is connected to the drill bit and is located at the side where the abutting portion is located. The end of the connecting portion away from the drill bit is provided with a threaded adapter section.

[0007] The drill bit of the utility model is provided with an abutment portion which plays a limiting role. Once the abutment portion contacts the surface of an object, it is determined that drilling can be stopped. The operator can achieve the target drilling depth in one go, and the operation is more convenient. The design of the chip removal surface allows the debris generated by drilling to be quickly discharged outwards, thereby improving the drilling efficiency and being beneficial to the final drilling effect.

[0008] Furthermore, it also includes a first adapter that can be connected to the electric drill.

[0009] Furthermore, the first adapter has a first threaded installation section connectable to the threaded adapter section, a blocking section, and an inserting section connectable to the clamping jaw of the electric drill, and the inserting section is formed with a neck with a reduced outer diameter.

[0010] Furthermore, it also includes a second adapter that can be connected to the electric wrench.

[0011] Furthermore, the second adapter has a second threaded mounting section connectable to the threaded adapter section, and a receiving section into which the protrusion of the power supply wrench is inserted, and a mounting hole is formed on the outer wall of the receiving section, which is opened corresponding to the opening of the protrusion.

[0012] The connecting part can be used with the existing electric drill on the market through the first adapter, and can be used with the existing electric wrench on the market through the second adapter. The installation structure between the connecting part and the first adapter and the second adapter is simple and stable, easy to assemble and disassemble, can adapt to different usage scenarios, and has a wider range of applications.

[0013] Furthermore, an annular limiting groove is formed at the location of the accommodating section and the mounting hole.

[0014] Furthermore, the axial height of the drilling portion is 9-15 mm. The above drilling depth can adapt to the hinge structure.

[0015] Furthermore, the drilling part also includes side-opening teeth radially arranged on both sides of the central positioning teeth. The central positioning teeth, side-opening teeth, and slotting teeth form a three-tooth two-edge structure, which makes drilling more accurate, more efficient, and less noisy.

[0016] Furthermore, the thread transition section is an internal thread transition section. The design of the thread transition section facilitates the assembly connection between the connecting part and the first transition piece or the second transition piece.

[0017] Furthermore, the axial length of the connecting portion is H1, the axial length of the threaded adapter section is H2, and H2 / H1 is 0.5-0.7. Under the above numerical ratio, a stable connection between the connecting portion and the first adapter and the second adapter can be achieved, while ensuring the stability of the drill bit drilling.

[0018] The beneficial effects of the utility model are as follows: the abutment portion plays a limiting role, the operator can achieve the target drilling depth in one time, and the operation is more convenient; the debris generated by drilling can be quickly discharged outwards through the chip removal surface, thereby improving the drilling efficiency; the connecting portion can be used in conjunction with existing machines on the market through the first adapter or the second adapter, which is convenient for disassembly and assembly and has a wider range of applications; the drilling is more precise and the drilling efficiency is higher; the overall structure is stable and the stability in use is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The three-dimensional structure of the drill bit and the connecting part of the utility model is shown in FIG. Figure 1 .

[0020] Figure 2 The three-dimensional structure of the drill bit and the connecting part of the utility model is shown in FIG. Figure 2 .

[0021] Figure 3 It is a front view of the drill bit and the connecting part in the utility model.

[0022] Figure 4 for Figure 3 AA section view in.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the first adapter in the utility model.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the drill bit, the connecting part and the second adapter in the utility model.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the second adapter in the utility model.

[0026] Among them, 1-drill bit, 11-drilling part, 111-center positioning tooth, 112-grooved tooth, 113-arc-shaped chip removal surface, 114-edge tooth, 12-abutment part, 2-connecting part, 21-threaded conversion section, 3-first conversion part, 31-first threaded mounting section, 32-blocking section, 33-plug-in section, 331-neck, 4-second conversion part, 41-second threaded mounting section, 42-accommodating section, 43-mounting hole, 44-annular limiting groove. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] like Figure 1-Figure 4 As shown, a hole opener assembly includes a drill bit 1 and a connecting portion 2; the drill bit 1 has a drilling portion 11 and an abutting portion 12, and a center positioning tooth 111, a radially extending slotted tooth 112, radially arranged side teeth 114 on both sides of the center positioning tooth 111, and an arc-shaped chip removal surface 113 on both sides of the slotted tooth 112 are arranged on the side of the drilling portion 11 away from the connecting portion 2. Specifically, the center positioning tooth 111 and the side teeth 114 are located in the same radial direction of the drilling portion 11, and the diameter direction of the slotted tooth 112 is approximately perpendicular to the diameter direction of the center positioning tooth 111 and the side teeth 114. The arc-shaped chip removal surface 113 is formed by being arc-shapedly concave downward from the end surface of the drilling portion 11 and toward both sides. When the drilling portion 11 drills a hole to form chips, the chips accumulate on the arc-shaped chip removal surface 113 and are quickly discharged outward. The drill bit 1 can be made of 45# high-quality structural steel, which has been quenched at high temperature, has high hardness and good wear resistance.

[0029] The abutment portion 12 is formed by radially extending outward from the outer wall of the drilling portion 11, so that when the drill bit 1 is used for drilling, the height of the drilling portion 11 limits its drilling depth. Once the surface of the object contacts the abutment portion 12, no deeper drilling operation can be performed. Therefore, the abutment portion 12 plays a limiting role, which determines the drilling depth of the drill bit 1. The hole opener assembly of the utility model is particularly suitable for drilling hinges. In this embodiment, the axial height of the drilling portion 11 is 9-15mm, that is, Figure 4 The average H3 is 9-15 mm, preferably, H3 is 10-14 mm, and more preferably, H3 is 10.2 mm.

[0030] The connecting portion 2 is fixedly connected to one side of the drill bit 1, and is the side where the abutting portion 12 is located. The end of the connecting portion 2 away from the drill bit 1 has a threaded transition section 21. In this embodiment, the threaded transition section 21 is an internal threaded transition section. Of course, in other embodiments, it can also be an external threaded transition section, which is not specifically limited. Figure 4 As shown, the axial length of the connecting portion 2 is H1, and the axial length of the threaded transition section 21 is H2, then H2 / H1 is 0.5-0.7, preferably, H1 is 40 mm, H2 is 25 mm, and the threaded transition section 21 is an M10 internal threaded hole.

[0031] like Figure 5 As shown, a hole opener assembly also includes a first adapter 3 that can be connected to an electric drill. The electric drill is an existing electric drill on the market, which has a clamping claw structure. The first adapter 3 has a first threaded installation section 31, a blocking section 32, and a plug-in section 33, which are arranged in sequence along the axial direction. The first threaded installation section 31 can be threadedly connected to the threaded adapter section 21 of the connecting part 2. The outer diameter of the blocking section 32 is increased, so that when the blocking section 32 abuts against the end face of the connecting part 2, the connecting part 2 and the first adapter 3 are assembled. The plug-in section 33 has a hexagonal cross section, which is formed with a neck 331 with a reduced outer diameter. The cross section of the neck 331 is circular, so that the plug-in section 33 is extended into the opened clamping claw part, and then the clamping claw part is folded to be fixedly clamped on the neck 331, so that the first adapter 3 and the electric drill will not be axially separated, and the hexagonal cross section of the plug-in section 33 is matched with the electric drill to prevent rotation.

[0032] When in use, an electric drill is used to provide power, which drives the first adapter 3 to rotate, and then drives the connecting part 2 to rotate, and finally achieves the purpose of drilling by the drill bit 1. In order to prevent the first adapter 3 from rotating away from the connecting part 2, the direction in which the electric drill drives the first adapter 3 to rotate is consistent with the threaded connection direction of the connecting part 2 and the first adapter 3; once the abutment portion 12 contacts the surface of the object, the drill bit 1 completes the drilling.

[0033] like Figure 6 , Figure 7As shown, a hole opener assembly also includes a second adapter 4 that can be connected to an electric wrench. The electric wrench is an existing electric wrench on the market, which has a second threaded mounting section 41 and a receiving section 42. The second threaded mounting section 41 can be threadedly connected to the threaded adapter section 21 of the connecting portion 2, and the receiving section 42 is inserted with the protrusion of the electric wrench. Specifically, the front end of the protrusion is cylindrical, and the rear end is a quadrilateral or polygon. The rear end is formed with an opening, and the outer wall of the receiving section 42 is provided with a mounting hole 43 at a position corresponding to the opening. Thus, the protrusion of the electric wrench is inserted into the receiving section 42, and the two are locked and matched, and then the pin is used to insert the mounting hole 43 and the opening in sequence, so as to realize the assembly connection between the second adapter 4 and the electric wrench. In this embodiment, a plurality of mounting holes 43 may be provided, which are evenly spaced along the circumference and all fall within the annular limiting groove 44 on the accommodating section 42. The annular limiting groove 44 can prevent the pin shaft from being offset during installation, and can also cooperate with the axial limiting of some models of electric wrenches to ensure a stable connection between the two.

[0034] When in use, an electric wrench is used to provide power, which drives the second adapter 4 to move, and then drives the connecting part 2 to move, and finally achieves the purpose of drilling by the drill bit 1. In order to prevent the second adapter 4 from rotating away from the connecting part 2, the direction in which the electric drill drives the second adapter 4 to rotate is consistent with the threaded connection direction of the connecting part 2 and the second adapter 4; once the abutment part 12 contacts the surface of the object, the drill bit 1 completes the drilling.

[0035] In different usage scenarios, the first adapter 3 and the second adapter 4 can be replaced.

[0036] The above specific implementation modes are used to explain the present invention rather than to limit the present invention. Any modification and change made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A hole opener assembly, characterized in that: include: A drill bit (1) comprises a drilling portion (11) and an abutment portion (12), wherein the drilling portion (11) comprises at least a central positioning tooth (111), radially extending slotted teeth (112), and arc-shaped chip removal surfaces (113) located on both sides of the slotted teeth (112), and the abutment portion (12) is formed by extending radially outward from the outer wall of the drilling portion (11); The connecting portion (2) is connected to the drill bit (1) and is located on the side where the abutting portion (12) is located. The end of the connecting portion (2) away from the drill bit (1) has a threaded connecting section (21).

2. The hole opener assembly according to claim 1, characterized in that: It also includes a first adapter (3) that can be connected to an electric drill.

3. The hole opener assembly according to claim 2, characterized in that: The first adapter (3) comprises a first threaded mounting section (31) connectable to the threaded adapter section (21), a blocking section (32), and an inserting section (33) connectable to the clamping jaw of an electric drill, wherein the inserting section (33) is formed with a neck (331) with a reduced outer diameter.

4. The hole opener assembly according to claim 1, characterized in that: It also includes a second adapter (4) that can be connected to the electric wrench.

5. The hole opener assembly according to claim 4, characterized in that: The second adapter (4) comprises a second threaded mounting section (41) connectable to the threaded adapter section (21), and a receiving section (42) into which the protruding portion of the power supply wrench is inserted, and a mounting hole (43) is formed on the outer wall of the receiving section (42), and the mounting hole (43) is opened corresponding to the opening of the protruding portion.

6. The hole opener assembly according to claim 5, characterized in that: An annular limiting groove (44) is formed at the location of the accommodating section (42) and the mounting hole (43).

7. The hole opener assembly according to claim 1, characterized in that: The axial height of the drilling portion (11) is 9-15 mm.

8. The hole opener assembly according to claim 1, characterized in that: The drilling portion (11) further comprises open-edge teeth (114) radially arranged on both sides of the central positioning tooth (111).

9. The hole opener assembly according to claim 1, characterized in that: The thread transition section (21) is an internal thread transition section.

10. The hole opener assembly according to claim 1, characterized in that: The axial length of the connecting portion (2) is H1, and the axial length of the threaded transition section (21) is H2, and H2 / H1 is 0.5-0.7.

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