CN219618061U

CN219618061U - Screw connection support Luo Zuantou

Info

Publication number: CN219618061U
Application number: CN202320608210.3U
Authority: CN
Inventors: 黄顺军
Original assignee: Yueqing Jinggong Tools Co ltd
Current assignee: Yueqing Jinggong Tools Co ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-09-01
Anticipated expiration: 2033-03-20

Abstract

The utility model relates to a screw joint supporting drill bit which comprises a drill rod and a drill shank which are integrally formed, wherein a connecting hole is formed in the bottom of the drill shank, and connecting threads are arranged in the connecting hole. According to the utility model, the connecting hole with the connecting thread is arranged on the drill handle for connecting with the driving device, so that the stable connection is ensured, and meanwhile, the disassembly and the assembly are convenient enough, and the universality is strong.

Description

Screw connection support Luo Zuantou

Technical Field

The utility model relates to the technical field of corollary drills, in particular to a screw joint Luo Zuantou.

Background

The branch Luo Zuantou is one of the drill bits and is mainly used for perforating wood, and a large amount of scraps are generated during perforation. The existing supporting drill mainly comprises a drill rod and a drill handle, wherein a spiral cutting edge is arranged on the drill rod, and a positioning mechanism is arranged on the drill rod to be connected with a driving device for use. The existing drill bit connection modes mainly comprise two types: the first is that the connection is carried out through the locating slot on the drill shank, such as a high-efficient radiating chip removal branch Luo Zuantou disclosed in the application number 2018216498699. Secondly, the drill bit is connected through a limiting surface on the drill shank, such as a drill bit which is convenient for chip removal and disclosed in the application number 2019223812331. The above connection modes are all connected through limiting, and the connection is unstable, the disassembly and the assembly are inconvenient, and the universality is poor.

Disclosure of Invention

In view of the deficiencies in the prior art, the present utility model provides a threaded shank Luo Zuantou.

The technical scheme adopted by the utility model is as follows: the screw joint supporting drill bit comprises a drill rod and a drill shank which are integrally formed, wherein a connecting hole is formed in the bottom of the drill shank, and connecting threads are arranged in the connecting hole.

Further, a spiral cutting edge is arranged along the length direction of the drill rod, and a tungsten steel tool bit is welded at the top of the spiral cutting edge.

Further, the drill shank is of a cylindrical structure.

Further, chamfers are arranged on the inner side and the outer side of the opening of the connecting hole.

Further, the top of the drill rod is extended with a conical screw tip, the periphery of the conical screw tip is provided with a screw blade, and the diameter of the screw blade is gradually enlarged from top to bottom.

Further, an arc-shaped concave surface is arranged on the inner wall of the lowest end of the spiral blade, and an auxiliary chip groove is arranged at the bottommost part of the spiral blade.

Further, the depth of the auxiliary chip removal groove is 0.2mm-0.5mm.

Further, the spiral cutting edge is two, three or four.

The beneficial effects of the utility model are as follows: according to the utility model, the connecting hole with the connecting thread is arranged on the drill handle for connecting with the driving device, so that the stable connection is ensured, and meanwhile, the disassembly and the assembly are convenient enough, and the universality is strong.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages.

The utility model will be described in further detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Fig. 3 is a schematic structural view of another view of the present utility model.

FIG. 4 is a schematic view of a four-bladed drill bit

In fig. 1-4: 1. a drill rod; 2. a drill shank; 3. a connection hole; 4. a helical cutting edge; 5. tungsten steel tool bit; 6. chamfering; 7. a conical screw tip; 8. a helical blade; 9. an arc-shaped concave surface; 10. and a chip removal groove is assisted.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

The utility model provides a screw connection Luo Zuantou.

In this embodiment, referring to fig. 1-4, the screw joint auger bit comprises a drill rod 1 and a drill shank 2 which are integrally formed, wherein a connecting hole 3 is formed in the bottom of the drill shank, and connecting threads are arranged in the connecting hole.

Among the above-mentioned technical scheme, through set up the connecting hole that has the connecting screw thread on the drill shank and be used for being connected with drive arrangement and use, when guaranteeing to connect stably, the dismouting is also enough convenient, and the commonality is strong.

Specifically, a spiral cutting edge 4 is arranged along the length direction of the drill rod, and a tungsten steel tool bit 5 is welded at the top of the spiral cutting edge.

According to the technical scheme, the tungsten steel tool bit is welded at the top of the spiral cutting edge, so that the tungsten steel tool bit has better wear resistance, and the service life of the drill bit can be greatly prolonged.

The tungsten steel tool bit has better wear resistance, and in addition, the whole of the drill bit is made of the existing common metal alloy, and only the tungsten steel tool bit is welded on the drill bit, so that the service life of the drill bit is greatly prolonged while the manufacturing cost is ensured.

Specifically, the drill handle is of a cylindrical structure; and chamfers 6 are arranged on the inner side and the outer side of the opening of the connecting hole.

Specifically, the top of the drill rod is extended with a conical screw tip 7, the periphery of the conical screw tip is provided with a screw blade 8, and the diameter of the screw blade gradually expands from top to bottom.

In the technical scheme, through setting up toper spiral tip and helical blade, can carry out the predrilled, reduce the cutting pressure of follow-up cutting edge, improve drill bit life.

Specifically, an arc-shaped concave surface 9 is arranged on the inner wall of the lowest end of the spiral blade, and an auxiliary chip groove 10 is arranged at the bottommost part of the spiral blade; the depth of the auxiliary chip removal groove is 0.2mm-0.5mm.

Among the above-mentioned technical scheme, can improve the chip removal ability of drill bit through set up arc concave surface and supplementary chip groove in spiral sword bottom, in time discharge the saw-dust, in time reduce friction, improve the heat dissipation, help improving cutting ability, heat dissipation ability and the chip removal ability of drill bit.

Specifically, the number of the spiral cutting edges is two, three or four.

The skilled person will know: while the utility model has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the utility model, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

Claims

1. The utility model provides a spiro union crow bit, includes integrated into one piece's drilling rod and drill shank, its characterized in that: the bottom of the drill handle is provided with a connecting hole, and connecting threads are arranged in the connecting hole.

2. The threaded connection Luo Zuantou of claim 1, wherein: and a spiral cutting edge is arranged along the length direction of the drill rod, and a tungsten steel tool bit is welded at the top of the spiral cutting edge.

3. The threaded connection Luo Zuantou of claim 1, wherein: the drill shank is of a cylindrical structure.

4. The threaded connection Luo Zuantou of claim 1, wherein: and chamfers are arranged on the inner side and the outer side of the opening of the connecting hole.

5. The threaded connection Luo Zuantou according to any one of claims 1-4, wherein: the top of the drill rod is extended with a conical screw tip, the periphery of the conical screw tip is provided with a screw blade, and the diameter of the screw blade is gradually enlarged from top to bottom.

6. The threaded connection Luo Zuantou of claim 5, wherein: the inner wall of the lowest end of the spiral blade is provided with an arc-shaped concave surface, and the bottommost part of the spiral blade is provided with an auxiliary chip removal groove.

7. The threaded connection Luo Zuantou of claim 6, wherein: the depth of the auxiliary chip removal groove is 0.2mm-0.5mm.

8. The threaded connection Luo Zuantou of claim 2, wherein: the number of the spiral cutting edges is two, three or four.