CN202606942U - Drill bit capable of forming conical holes - Google Patents
Drill bit capable of forming conical holes Download PDFInfo
- Publication number
- CN202606942U CN202606942U CN 201220320191 CN201220320191U CN202606942U CN 202606942 U CN202606942 U CN 202606942U CN 201220320191 CN201220320191 CN 201220320191 CN 201220320191 U CN201220320191 U CN 201220320191U CN 202606942 U CN202606942 U CN 202606942U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- bit body
- post
- bar portion
- bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a drill bit capable of forming conical holes. The drill bit comprises a drill bit body, wherein a cutting blade is arranged on the top of the drill bit body; a rod is arranged at the tail of the drill bit body; a globe journal is arranged in the middle of the drill bit body; and a spiral chip groove is formed in the periphery of the drill bit body and extends from the top of the drill bit body to the tail end of the drill bit body. A transitional step is arranged between the drill bit body and the rod. Outer threads are formed at a connecting end of the rod, and a plurality of key slots are formed in the tail end of the rod. The drill bit can drill a conical hole at a time, drilling efficiency is improved, and the drill bit is not required to be replaced in a drilling process.
Description
Technical field
The utility model relates to a kind of drill bit, is specifically related to a kind of drill bit that can form the post bellmouth.
Background technology
During the prepackage crab-bolt, need be in the hole that a post taper of ground or metope brill is installed.At present, this post bellmouth adopts two drill bits and leader to hold percussion drill, the leader holds circular bit and forms, and in two drill bits, wherein one being common drill bit, and another is for having the drill bit of globe journal.
The boring method of this post bellmouth is following: load onto cylindrical hole of common bit drills with hand-held percussion drill earlier; Load onto the drill bit that has globe journal with hand-held circular bit then, making this drill bit is the axle center with the globe journal, around the axle center cylindrical hole is hinged into the post bellmouth.The method of this formation post bellmouth, drilling efficiency is low, and work the time need be with two drill bits, two drilling machines, wears inconvenience, the trouble that changes the outfit in the boring procedure.
Summary of the invention
The utility model technical problem to be solved provides a kind of drill bit that can form the post bellmouth, and it can disposable formation post bellmouth.
For solving the problems of the technologies described above, the technical solution that the utility model can form the drill bit of post bellmouth is:
Comprise bit body, the top of bit body is provided with cutting blade, and the afterbody of bit body is provided with bar portion; The middle part of bit body is provided with globe journal; The periphery of bit body is provided with spiral chip area, and chip area extends to tail end from the top of bit body.
Be provided with transition shoulder between said bit body and the bar portion.
The link of said bar portion is provided with external screw thread, and the tail end of bar portion is provided with a plurality of keyways.
Said a plurality of keyway circumferentially evenly distributes along bar portion.
The technique effect that the utility model can reach is:
The utility model can disposable completion post bellmouth boring, improve drilling efficiency, and need not more bit change in the boring procedure.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation:
Fig. 1 is the sketch map that the utility model can form the drill bit of post bellmouth;
Fig. 2 is the stereogram of the utility model.
Description of reference numerals among the figure:
1 is bit body, and 2 is cutting blade,
3 is bar portion, and 4 is globe journal,
5 is chip area, and 6 is transition shoulder,
7 is external screw thread, and 31 is keyway.
The specific embodiment
Like Fig. 1, shown in Figure 2, the utility model can form the drill bit of post bellmouth, comprises bit body 1, and the top of bit body 1 is provided with cutting blade 2, and the afterbody of bit body 1 is provided with bar portion 3;
Be provided with transition shoulder 6 between bit body 1 and the bar portion 3;
The middle part of bit body 1 is provided with globe journal 4;
The periphery of bit body 1 is provided with spiral chip area 5, and chip area 5 extends to tail end from the top of bit body 1;
The link of bar portion 3 is provided with external screw thread 7, and the tail end of bar portion 3 is provided with a plurality of keyways 31; A plurality of keyways 31 circumferentially evenly distribute along bar portion 3.
During use; Bar portion 3 is inserted in the rotary impact type drilling machines, on required ground or the metope percussive drilling, after waiting to pierce the deep hole of required crab-bolt length; Handle the rotation of rotary impact type drilling machine again; Carry out 360 ° of fraisings around globe journal 4, the circular port end is twisted into taper, thus disposable formation post coniform hole.
Claims (4)
1. drill bit that can form the post bellmouth, it is characterized in that: comprise bit body, the top of bit body is provided with cutting blade, and the afterbody of bit body is provided with bar portion; The middle part of bit body is provided with globe journal; The periphery of bit body is provided with spiral chip area, and chip area extends to tail end from the top of bit body.
2. the drill bit that can form the post bellmouth according to claim 1 is characterized in that: be provided with transition shoulder between said bit body and the bar portion.
3. the drill bit that can form the post bellmouth according to claim 1 is characterized in that: the link of said bar portion is provided with external screw thread, and the tail end of bar portion is provided with a plurality of keyways.
4. the drill bit that can form the post bellmouth according to claim 3 is characterized in that: said a plurality of keyways circumferentially evenly distribute along bar portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320191 CN202606942U (en) | 2012-07-04 | 2012-07-04 | Drill bit capable of forming conical holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320191 CN202606942U (en) | 2012-07-04 | 2012-07-04 | Drill bit capable of forming conical holes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202606942U true CN202606942U (en) | 2012-12-19 |
Family
ID=47340674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220320191 Expired - Fee Related CN202606942U (en) | 2012-07-04 | 2012-07-04 | Drill bit capable of forming conical holes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202606942U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717127A (en) * | 2012-07-04 | 2012-10-10 | 邱立华 | Drill being capable of forming cylindrical-conical hole |
| CN104722813A (en) * | 2013-12-21 | 2015-06-24 | 中建四局安装工程有限公司 | Method and percussion bit for drilling back taper hole in concrete wall |
| CN110461515A (en) * | 2018-01-22 | 2019-11-15 | Osg株式会社 | The manufacturing method of step drill and step drill |
-
2012
- 2012-07-04 CN CN 201220320191 patent/CN202606942U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717127A (en) * | 2012-07-04 | 2012-10-10 | 邱立华 | Drill being capable of forming cylindrical-conical hole |
| CN104722813A (en) * | 2013-12-21 | 2015-06-24 | 中建四局安装工程有限公司 | Method and percussion bit for drilling back taper hole in concrete wall |
| CN110461515A (en) * | 2018-01-22 | 2019-11-15 | Osg株式会社 | The manufacturing method of step drill and step drill |
| US11103933B2 (en) | 2018-01-22 | 2021-08-31 | Osg Corporation | Step drill and manufacturing method for step drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20210704 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |