CN202645436U - Combined drill bit - Google Patents
Combined drill bit Download PDFInfo
- Publication number
- CN202645436U CN202645436U CN 201220220427 CN201220220427U CN202645436U CN 202645436 U CN202645436 U CN 202645436U CN 201220220427 CN201220220427 CN 201220220427 CN 201220220427 U CN201220220427 U CN 201220220427U CN 202645436 U CN202645436 U CN 202645436U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- bit
- broaching
- hole
- drill
- 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 relates to a combined drill bit which comprises a drill bit part and a broaching part, wherein the drill bit part comprises a drill bit rod and a drill bit; the drill bit is arranged at the front end of the drill bit rod; a first through hole is arranged at the center of the drill bit rod; the broaching part is arranged at the rear end of the drill bit part; the broaching part comprises a broaching base, a broaching knife and a second through hole; the second through hole is arranged at the center of the broaching base; the second through hole is communicated with the first through hole; the broaching knife is arranged on a peripheral wall of the broaching base; and when an external force along a drilling direction of the drill bit is acted on the broaching knife, the radius of the broaching knife is reduced. According to the scheme provided by the utility model, the drill bit is used for drilling while the broaching part is used for broaching; a wall protecting pipe, of which the outer diameter is more than that of the drill bit and less than or equal to that of the broaching part is inserted; the operation is easily realized; and when the combined drill bit is required to be taken out, the combined drill bit is conveniently taken out of the wall protecting pipe, because the radius of the broaching knife is reduced when the external force along the drilling direction of the drill bit is acted on the broaching knife.
Description
Technical field
The utility model relates to a kind of improvement of drill bit, and espespecially a kind of combined drill that makes things convenient for protection casing to insert in the hole that drill bit bores and make things convenient for the taking-up of drill bit belongs to capital construction and improves technical field with drill bit.
Background technology
In capital works, often need to carry out bore operation with drill bit, in the process that drill bit creeps into, for preventing caving in of the hole of having bored, need in the hole of having bored, insert wall protection pipe, the external diameter of wall protection pipe is much the same with hole-drilled internal diameter, like this to make things convenient for the insertion of wall protection pipe; If always so first boring, the wall protection pipe that then follows up operates down, to last, can find that drill bit cannot take out, thereby, need to improve the structure of drill bit, to adapt to the needs of this bore operation.
The utility model content
For the technical problem of above-mentioned existence, the purpose of this utility model is: proposed a kind of combined drill that makes things convenient for protection casing to insert in the hole that drill bit bores and make things convenient for the taking-up of drill bit.
Technical solution of the present utility model is achieved in that a kind of combined drill, comprises bit head, reamer; Described bit head comprises drill bit shaft, drill bit; Described drill bit is arranged on the leading section of drill bit shaft; The center of described drill bit shaft is provided with the first through hole; Described reamer is arranged on the rear end of bit head; Described reamer comprises reaming seat, cornish bit, the second through hole; Described the second through hole is arranged on the center of reaming seat; Described the second through hole is communicated with the first through hole; Described cornish bit arranges on the circle wall of reaming seat; When cornish bit was subject to the external force identical with the drill bit drilling direction, the radius of described cornish bit can dwindle.
Preferably, be provided with groove on the sidewall of described reaming seat, described cornish bit is arranged in the groove by axis of rotation.
Preferably, be provided with spring between described cornish bit and the groove.
Preferably, described cornish bit is triangular in shape or fan-shaped, and the longest edge of described cornish bit is arranged on the top.
Because the utilization of technique scheme, the utility model compared with prior art has following advantages:
Combined drill of the present utility model, can be in the process that drill bit creeps into, carry out reaming by reamer simultaneously, and then insertion wall protection pipe, the external diameter of described wall protection pipe can be less than or equal to greater than the external diameter of drill bit the external diameter of reamer, during the easiest insertion of wall protection pipe of this specification has been holed, after bit drills puts in place, in the time of need to extracting combined drill, because the cornish bit of combined drill is when being subject to the external force identical with the drill bit drilling direction, the radius of described cornish bit can dwindle, and can easily combined drill be extracted from wall protection pipe like this; The utility model scenario-frame is simple, easy to operate, practical.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Accompanying drawing 1 is the schematic diagram of combined drill described in the utility model;
Accompanying drawing 2 is the partial sectional view of the bit head of combined drill described in the utility model;
Accompanying drawing 3 is the front view of the reamer of combined drill described in the utility model;
Accompanying drawing 4 is the top view of the reamer of combined drill described in the utility model;
Wherein: 1, bit head; 2, reamer; 11, drill bit shaft; 12, drill bit; 13, the first through hole; 21, reaming seat; 22, cornish bit; 23, the second through hole; 24, groove; 25, axis of rotation.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described.
Be depicted as a kind of combined drill described in the utility model such as Fig. 1-4, comprise bit head 1, reamer 2; Described bit head 1 comprises drill bit shaft 11, drill bit 12; Described drill bit 12 is arranged on the leading section of drill bit shaft 11; The center of described drill bit shaft 11 is provided with the first through hole 13; Described reamer 2 is arranged on the rear end of bit head 1; Described reamer 2 comprises reaming seat 21, cornish bit 22, the second through hole 23; Described the second through hole 23 is arranged on the center of reaming seat 21; Described the second through hole 23 is communicated with the first through hole 13; Described cornish bit 22 arranges on the circle wall of reaming seat 21; In the present embodiment, be provided with groove 24 on the sidewall of described reaming seat 21, described cornish bit 22 is arranged in the groove 24 by axis of rotation 25; Be provided with spring (not marking) between described cornish bit 22 and the groove 24, so that cornish bit 22 has the ability of stable maintenance certain radius; Described cornish bit 22 is triangular in shape or fan-shaped, and the longest edge of described cornish bit 22 is arranged on the top, and when cornish bit 22 was subject to the external force identical with the drill bit drilling direction, the radius of described cornish bit 22 can dwindle.
Combined drill of the present utility model, can be in the process that drill bit 12 creeps into, carry out reaming by reamer 2 simultaneously, and then insertion wall protection pipe, the external diameter of described wall protection pipe can be less than or equal to greater than the external diameter of drill bit the external diameter of reamer, during the easiest insertion of wall protection pipe of this specification has been holed, after drill bit 12 gets into the position, in the time of need to extracting combined drill, because the cornish bit 22 of combined drill is when being subject to the external force identical with the drill bit drilling direction, the radius of described cornish bit 22 can dwindle, and can easily combined drill be extracted from wall protection pipe like this; The utility model scenario-frame is simple, easy to operate, practical.
Below only be concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the utility model rights protection scope.
Claims (4)
1. a combined drill is characterized in that: comprise bit head, reamer; Described bit head comprises drill bit shaft, drill bit; Described drill bit is arranged on the leading section of drill bit shaft; The center of described drill bit shaft is provided with the first through hole; Described reamer is arranged on the rear end of bit head; Described reamer comprises reaming seat, cornish bit, the second through hole; Described the second through hole is arranged on the center of reaming seat; Described the second through hole is communicated with the first through hole; Described cornish bit arranges on the circle wall of reaming seat; When cornish bit was subject to the external force identical with the drill bit drilling direction, the radius of described cornish bit can dwindle.
2. combined drill according to claim 1, it is characterized in that: be provided with groove on the sidewall of described reaming seat, described cornish bit is arranged in the groove by axis of rotation.
3. combined drill according to claim 2 is characterized in that: be provided with spring between described cornish bit and the groove.
4. according to claim 1 and 2 or 3 described combined drills, it is characterized in that: described cornish bit is triangular in shape or fan-shaped, and the longest edge of described cornish bit is arranged on the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220220427 CN202645436U (en) | 2012-05-17 | 2012-05-17 | Combined drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220220427 CN202645436U (en) | 2012-05-17 | 2012-05-17 | Combined drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202645436U true CN202645436U (en) | 2013-01-02 |
Family
ID=47414558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220220427 Expired - Fee Related CN202645436U (en) | 2012-05-17 | 2012-05-17 | Combined drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202645436U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650193A (en) * | 2012-05-17 | 2012-08-29 | 苏州市能工基础工程有限责任公司 | Combined drill |
| CN105735899A (en) * | 2016-04-12 | 2016-07-06 | 苏州市能工基础工程有限责任公司 | Drum drill for drilling anchor rod |
| CN114352206A (en) * | 2021-11-25 | 2022-04-15 | 傅丽兵 | Drill bit for expanding diameter |
-
2012
- 2012-05-17 CN CN 201220220427 patent/CN202645436U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650193A (en) * | 2012-05-17 | 2012-08-29 | 苏州市能工基础工程有限责任公司 | Combined drill |
| CN105735899A (en) * | 2016-04-12 | 2016-07-06 | 苏州市能工基础工程有限责任公司 | Drum drill for drilling anchor rod |
| CN105735899B (en) * | 2016-04-12 | 2018-05-25 | 苏州市能工基础工程有限责任公司 | Armature boring is bored with cylinder |
| CN114352206A (en) * | 2021-11-25 | 2022-04-15 | 傅丽兵 | Drill bit for expanding diameter |
| CN114352206B (en) * | 2021-11-25 | 2024-01-12 | 湖北兴龙工具有限公司 | Drill bit for expanding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20140517 |