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Drill bits for drilling convex holes

A convex hole and drill bit technology, applied in the drill bit field, can solve the problem that the drill bit cannot drill the convex hole and the like

Inactive Publication Date: 2017-02-22
深圳市鑫金泉精密技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, the drill bit can only drill holes with the same internal and external diameters. However, in engineering, it is often necessary to drill holes with a large internal diameter and a small external diameter. Such holes are similar in shape to the Chinese character "convex", so such holes are named convex holes. , prior art drills cannot drill convex holes

Method used

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  • Drill bits for drilling convex holes
  • Drill bits for drilling convex holes
  • Drill bits for drilling convex holes

Examples

Experimental program
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Effect test

Embodiment 1

[0027] See attached figure 1 , is the left view of the present invention. In order to facilitate the description of the specification and to keep the picture from looking messy, some components are omitted in this figure. These appended figure 1 Components that are omitted in , and that are necessary, will be described in other paragraphs that follow in this specification.

[0028] According to the knowledge of mechanics, when an object moves in a circle, if the centripetal force is insufficient, it will move away from the center of the circle.

[0029] attached figure 1 Among them, the clamping handle 1 and the circular rotating box 6 are fixedly connected, the rotating surface of the rotating box 6 is perpendicular to the rotating axis where the clamping handle 1 is located, and the center of mass of the rotating box 6 is a point where the rotating axis of the clamping handle 1 is located. The other end of the shaft 2 extends out of the rotating box 6 and is fixedly connec...

Embodiment 2

[0036] There can be three groups of throwing shafts in the rotary box 6, and corresponding throwing sheets 3, grinding sheets 4, spacer rings 21, shaft-limiting seats 22, coil springs 23, and fixed rods 231. Those skilled in the relevant art should know that: in order to prevent vibration, the center of mass of all the flingers 3 and the grinding piece 4 is a point where the rotation axis of the clamping handle 1 is located.

Embodiment 3

[0038] There can be four groups of throwing shafts in the rotating box 6, and corresponding throwing sheets 3, grinding sheets 4, spacer rings 21, shaft limiting seats 22, coil springs 23, and fixed rods 231. Those skilled in the relevant art should know that: in order to prevent vibration, the center of mass of all the flingers 3 and the grinding piece 4 is a point where the rotation axis of the clamping handle 1 is located. In the same way, there can be more sets of swing shafts, and corresponding other components.

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Abstract

The invention relates to a drill bit used for drilling a convex hole. Holes with large inner diameters and small outer diameters frequently need to be drilled in a project, and convex holes cannot be drilled through drill bits in the prior art. In order to overcome the defects in the prior art, the drill bit used for drilling the convex hole comprises a clamping handle and is characterized in that the other end of the clamping handle is connected with a round rotating box, the plane where throwing pieces are located is perpendicular to the rotating axis of the clamping handle, the ends, away from throwing shafts, of the throwing pieces are provided with grinding pieces perpendicular to the throwing pieces, the grinding pieces are fixedly connected with the throwing pieces, the grinding pieces are in a circular arc shape, the curvature radius of the inner diameter of the grinding pieces is equal to the radius of the rotating box, and the centers of mass of the throwing pieces and the grinding pieces are points where the rotating axis of the clamping handle is located.

Description

[0001] This application is a divisional application of the invention application with the application number: 2013102357822, the title of the invention: drill bit for drilling convex holes, and the application date: June 16, 2013. technical field [0002] The invention relates to a drill bit, especially a drill bit capable of drilling convex holes. Background technique [0003] Usually, the drill bit can only drill holes with the same internal and external diameters. However, in engineering, it is often necessary to drill holes with a large internal diameter and a small external diameter. Such holes are similar in shape to the Chinese character "convex", so such holes are named convex holes. , the drill bit of the prior art cannot drill out the convex hole. Contents of the invention [0004] In order to solve the deficiencies of the prior art, the present invention proposes a drill bit, which can drill convex holes. The technical solution adopted by the present invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B5/48
CPCB24B5/48
Inventor 窦明乾王聪奎
Owner 深圳市鑫金泉精密技术有限公司
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