CN216966352U

CN216966352U - Hole digger

Info

Publication number: CN216966352U
Application number: CN202220006352.8U
Authority: CN
Inventors: 谢丙耐
Original assignee: Nanjing Fangrui Machinery Co ltd
Current assignee: Nanjing Fangrui Machinery Co ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-07-15
Anticipated expiration: 2032-01-04

Abstract

The application provides a hole digger, which comprises a hole drilling bit and a drill handle connected with the hole drilling bit, wherein the hole drilling bit comprises a cutting part and a connecting arm connected with the cutting part, and the cutting part is provided with cutting teeth; and the connecting arm is provided with a convex part corresponding to the rotation direction of the punching drill bit, and the convex part protrudes towards the cutting teeth. The hole digger realizes the flatness and smoothness of the holes.

Description

Hole digger

Technical Field

The embodiment of the application relates to electric tool spare and accessory part technical field, especially relates to a hole digger.

Background

With the development of science and technology, the use of electric tools has become more and more widespread. Drill bits used with power tools are also being promoted and updated. The main working principle of the drill bit is as follows: the drill bit rotates around the vertical shaft and moves axially. The drilled material is cut under the action of torque and axial force of the drill bit, is broken and crushed under the action of the extrusion and centrifugal force of the working blades, forms chips which are pressed to the hole wall and is lifted to the outside along the page. When the debris moves to the non-porous wall barrier, the debris is thrown around the hole due to centrifugal force, completing the drilling process. The types of drill bits are various: twist drills, spade drills, deep hole drills, reamer drills, core drills, and the like.

However, the hole opener in the prior art cannot ensure the smoothness of the opening.

Therefore, there is a need to provide a new technical solution to solve the above problems.

Disclosure of Invention

The main technical problem who solves of this application is to provide a hole digger, and the realization trompil that can be fine levels smoothly.

In order to solve the technical problem, the application provides a hole digger, which comprises a hole punching drill bit and a drill handle connected with the hole punching drill bit, wherein the hole punching drill bit comprises a cutting part and a connecting arm connected with the cutting part, and the cutting part is provided with cutting teeth; the connecting arm is provided with a convex portion corresponding to the rotation direction of the hole-piercing drill, and the convex portion protrudes towards the cutting teeth.

In a preferred embodiment, the height of the projection is lower than the height of the cutting tooth.

In a preferred embodiment, the ratio of the width of the protrusion to the width of the connecting arm is 4: 10.

In a preferred embodiment, there are four connecting arms, and the four connecting arms are connected with each other.

In a preferred embodiment, the perforating drill is formed by punching a metal plate and then machining.

In a preferred embodiment, the hole-drilling bit comprises a flat annular limiting part, and the limiting part is perpendicular to the cutting part; the plane of the limiting part is perpendicular to the drill handle.

The beneficial effect of this application: corresponding to the direction of rotation of the hole-drilling bit, the connecting arm is provided with a convex part facing the cutting teeth, and the hole-drilling device realizes smooth and flat hole drilling.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

fig. 1 is a schematic structural view of an embodiment of the present hole opener;

fig. 2 is a schematic view of another angle of the present disclosure of a hole opener.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work according to the embodiments of the present application are within the scope of the present application.

Referring to fig. 1 and 2, the present hole cutter 100 includes a drill bit 1 and a shank 2 connected to the drill bit 1. The drill handle 2 is connected with a motor, and the punching drill bit 1 rotates around a shaft under the driving of the drill handle 2 and moves axially at the same time to realize hole opening.

The hole-drilling bit 1 can be formed by punching a metal plate and then processing the metal plate, and comprises a flat annular limiting part 11, a cutting part 12 connected with the limiting part 11 in a bending manner, and a connecting arm 13 connected to the other end of the cutting part 12. The plane of the limiting part 11 is perpendicular to the drill handle 2. The cutting part 12 is perpendicular to the limiting part 11 and is provided with cutting teeth, and the extending direction of the cutting teeth is the same as the rotating direction of the perforating drill bit 1 and is used for cutting and perforating. The number of the connecting arms 13 may be plural, in this embodiment, four connecting arms 13 are provided, and the four connecting arms 13 are formed by cutting out a metal plate after stamping and are connected with each other. The connecting arm 13 is provided with a projection 131 corresponding to the direction of rotation of the perforating bit 1, the projection 131 projecting towards the cutting teeth. The projection 131 can be used for further cutting or cleaning of chips when the drill bit 1 is large in size. The height of the protrusion 131 is lower than the height of the cutting tooth. The ratio of the width of the convex portion 131 to the width of the connecting arm 13 is 4: 10.

The drill handle 2 is fixedly connected with the connecting arm 13 so as to realize the stable connection of the drill handle 2 and the perforating drill bit 1. The drill shank 2 comprises a clamped portion 21 and a locating portion 22. The clamped part 21 can be a hexagonal prism, so that the motor can be conveniently clamped and connected to realize torque output. The locating portion 22 comprises a locating head which is generally conical.

When the tapping type is performed, firstly, the positioning head is integrally positioned, then the cutting teeth are used for peripheral cutting, further, the convex portion 131 is used for further cutting or cleaning chips, and after the tapping is performed to a certain depth, the limiting portion 11 is used for realizing depth limiting so as to complete tapping. The hole made by the hole opener 100 of the present application is flat and smooth.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A hole digger comprises a hole punching drill bit and a drill handle connected with the hole punching drill bit, and is characterized in that the hole punching drill bit comprises a cutting part and a connecting arm connected with the cutting part, and the cutting part is provided with cutting teeth; the connecting arm is provided with a convex portion corresponding to the rotation direction of the hole-piercing drill, and the convex portion protrudes towards the cutting teeth.

2. The hole cutter of claim 1, wherein the height of the projection is less than the height of the cutting tooth.

3. The hole cutter according to claim 1, wherein the ratio of the width of the projection to the width of the connecting arm is 4: 10.

4. The hole cutter according to claim 1 wherein there are four of said connecting arms, said four connecting arms being interconnected.

5. The hole cutter of claim 1, wherein the perforating bit is stamped and formed from sheet metal.

6. The hole cutter according to claim 1, wherein said hole-piercing drill includes a flat annular stop portion, said stop portion being perpendicular to said cutting portion; the plane of the limiting part is perpendicular to the drill handle.