阅读说明：本技术 一种扩孔钻头 (Expanding drill bit ) 是由 石鸿儒 石中玉 吕中礼 顾成周 于 2020-04-08 设计创作，主要内容包括：本发明涉及五金工具领域,尤其涉及一种扩孔钻头,包括钻头主体和设置在所述钻头主体一端的扩孔头；所述钻头主体包括夹持段、切削段和顶出销；所述夹持段、切削段和顶出销依次排列；所述扩孔头包括钻体、沿径向设置在所述钻体中部侧面的安装槽和与所述钻体固定连接的弹片装置；所述弹片装置设置在安装槽内；本发明可以钻出里面直径大外面直径小的孔,并且提高安装膨胀栓的载荷量。(The invention relates to the field of hardware tools, in particular to a reaming drill bit, which comprises a drill bit main body and a reaming head arranged at one end of the drill bit main body; the drill bit main body comprises a clamping section, a cutting section and an ejector pin; the clamping section, the cutting section and the ejector pin are arranged in sequence; the reaming head comprises a drill body, an installation groove arranged on the side surface of the middle part of the drill body along the radial direction and a spring plate device fixedly connected with the drill body; the elastic sheet device is arranged in the mounting groove; the invention can drill the hole with large inner diameter and small outer diameter, and improve the load capacity of the expansion bolt.)

1. A reamer bit, characterized in that: the drilling tool comprises a drill bit main body and a reaming head arranged at one end of the drill bit main body;

the drill bit main body comprises a clamping section (1), a cutting section (2) and an ejector pin (3); the clamping section (1), the cutting section (2) and the ejection pin (3) are arranged in sequence;

the reaming head comprises a drill body (4), an installation groove (5) which is arranged on the side surface of the middle part of the drill body (4) along the radial direction and a spring plate device which is fixedly connected with the drill body; the elastic piece device is arranged in the mounting groove (5).

2. A reamer bit according to claim 1, wherein: the clamping section (1) is cylindrical; the cutting section (2) is in a twist shape; one end of the ejector pin (3) connected with the cutting section (2) is square, and the other end of the ejector pin is wedge-shaped; the cross-sectional area of the ejector pin (3) is smaller than that of the cutting section (2).

3. A reamer bit according to claim 1, wherein: the drill body (4) further comprises a bolt hole (11); the bolt hole (11) is axially arranged at one end of the drill body (4) close to the drill bit main body; the bolt hole (11) is a square hole; the bolt hole (11) is communicated with the mounting groove (5).

4. A reamer bit according to claim 1, wherein: the drill body (4) further comprises a limiting hole (6) which is radially arranged on the side face of the drill body (4).

5. A reamer bit according to claim 1, wherein: the elastic piece device comprises a first elastic piece (9) and a second elastic piece (10); one end of the first elastic sheet (9) is fixedly connected with one end of the second elastic sheet (10); the other end of the first elastic sheet (9) is tightly attached to the other end of the second elastic sheet (10); one end of the first elastic sheet (9) tightly attached to the second elastic sheet (10) is provided with a groove for the ejection pin (3) to be inserted conveniently.

6. A reamer bit according to claim 4, wherein: the ejection pin (3) is also provided with a sliding groove (8); the sliding groove (8) and the limiting hole (6) are arranged in the same direction.

7. A reamer bit according to claim 6, wherein: the drill bit also comprises a jackscrew (7) which is arranged in the limiting hole (6) and used for preventing the drill body (4) from falling off from the drill bit main body; the jackscrew (7) is matched with the limiting hole (6); the jackscrew (7) is matched with the sliding groove (8).

8. A reamer bit according to claim 1, wherein: one end of the elastic sheet device, which is fixedly connected with the first elastic sheet (9) and the second elastic sheet (10), is fixedly connected with the drill body (4).

Technical Field

The invention relates to the field of hardware tools, in particular to a reaming bit.

Background

The drill bit that punches on the wall can only punch straight hole on the wall at present, and is limited by the use of the electric tool, the drill bit that punches on the wall generally can not be too big, many installation scenes need to use the expansion bolt, when installing the expansion bolt on the wall, drill the hole of the corresponding size on the fixed body with the electric impact drill (hammer) first, then fit bolt, expand tube into hole, screw the nut can make bolt, expand tube, mounting part and fixed body expand tightly and become an organic whole; the expansion bolt is based on the principle that after the expansion bolt is drilled into a hole in the ground or the wall surface, a nut on the expansion bolt is screwed by a spanner, the bolt moves outwards, but an outer metal sleeve is fixed, so that the metal sleeve is expanded by a large head at the bottom of the bolt to fully expand the whole hole, and the expansion bolt cannot be drawn out; however, the conventional punching drill bit is limited by the development of the drill bit technology, and can only punch straight holes, and the expansion of the expansion bolt is limited by the straight holes with the same inside and outside sizes, so that the load capacity of the expansion bolt is smaller; there is therefore a need for a drill bit that optimizes the principle of action of expansion bolts by drilling a hole that solves the problems that exist at present.

Disclosure of Invention

The invention aims to provide a drill bit which can make the inner diameter of a drill hole larger than the outer diameter of the drill hole smaller and improve the load capacity of installing an expansion bolt.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a hole expanding drill bit comprises a drill bit body and a hole expanding head arranged at one end of the drill bit body; the drill bit main body comprises a clamping section, a cutting section and an ejector pin; the clamping section, the cutting section and the ejector pin are arranged in sequence; the clamping section, the cutting section and the ejection pin are sequentially connected end to end and coaxially; the clamping section, the cutting section and the ejector pin jointly form a drill bit main body, and the three sections are integrated; the reaming head comprises a drill body, an installation groove arranged on the side surface of the middle part of the drill body along the radial direction and a spring plate device fixedly connected with the drill body; the elastic sheet device is arranged in the mounting groove; the mounting groove penetrates through the drill body.

As a further improvement of the invention, the clamping section is cylindrical; the cutting section is in a hemp flower shape; one end of the ejector pin, which is connected with the cutting section, is square, and the other end of the ejector pin is wedge-shaped; the ejector pin cross-sectional area is less than the cutting segment cross-sectional area.

As a further improvement of the invention, the drill body further comprises a plug pin hole; the bolt hole is axially arranged at one end of the drill body close to the drill bit main body; the bolt hole is a square hole; the bolt hole is communicated with the mounting groove; the bolt hole is arranged in the center of the end face where the bolt hole is located.

As a further improvement of the invention, the drill body also comprises a limiting hole which is radially arranged on the side surface of the drill body; the limiting hole is communicated with the bolt hole but does not penetrate through the drill body; the limiting hole is arranged at one end close to the bolt hole.

As a further improvement of the present invention, the spring plate device comprises a first spring plate and a second spring plate; one end of the first elastic sheet is fixedly connected with one end of the second elastic sheet; the other end of the first elastic sheet is tightly attached to the other end of the second elastic sheet; a groove which is convenient for an ejection pin to insert is formed at one end of the first elastic sheet which is tightly attached to the second elastic sheet; the groove is a triangular groove.

As a further improvement of the invention, a sliding groove is also arranged on the ejection pin; the sliding groove is consistent with the setting direction of the limiting hole.

As a further improvement of the invention, the device also comprises a top thread; the jackscrew is matched with the limiting hole; the jackscrew also is matched with the sliding groove, and a part of the jackscrew is arranged in the sliding groove to prevent the drill body from falling off from the drill bit main body.

As a further improvement of the present invention, one end of the elastic sheet device, which is fixedly connected to the first elastic sheet and the second elastic sheet, is fixedly connected to the drill body.

Compared with the prior art, the invention has the following beneficial effects:

the drill hole of the invention can make the diameter of the deep part of the drill hole larger relative to the diameter of the drill hole, the diameter of the inner part of the drill hole of the invention is larger, the diameter of the outer part is smaller, the expansion bolt can be fully expanded, and the load capacity of the expansion bolt can be increased; one end of the ejector pin is designed to be wedge-shaped, so that the ejector pin can be inserted between the first elastic sheet and the second elastic sheet more easily, and the two elastic sheets are more easily spread; the triangular groove formed at one end of the first elastic sheet tightly attached to the second elastic sheet can enable the ejector pin to be inserted more conveniently; the bolt hole on the drill body is designed into a square hole, so that the ejection pin can be prevented from rotating in the hole; the limiting hole is a threaded hole, a jackscrew can be screwed in, and a part of the limiting hole is placed in a sliding groove of the ejection pin to prevent the reaming head from falling off from the drill bit main body.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic structural diagram of the working state of the present invention;

FIG. 3 is a sectional view of the present invention in an operating state;

FIG. 4 is a cross-sectional view of an unsprung mass of the present invention;

FIG. 5 is a schematic view of the main body of the drill bit of the present invention;

FIG. 6 is a schematic diagram of the drill body structure of the present invention;

in the drawings: the cutting tool comprises a clamping section 1, a cutting section 2, an ejection pin 3, a drill body 4, a mounting groove 5, a limiting hole 6, a jackscrew 7, a sliding groove 8, a first elastic sheet 9, a second elastic sheet 10, a bolt hole 11 and a bolt hole.

Detailed Description

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