CN210530747U - Foot-type rotary-block concentric reaming and pipe-following drilling tool - Google Patents
Foot-type rotary-block concentric reaming and pipe-following drilling tool Download PDFInfo
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- CN210530747U CN210530747U CN201921279232.XU CN201921279232U CN210530747U CN 210530747 U CN210530747 U CN 210530747U CN 201921279232 U CN201921279232 U CN 201921279232U CN 210530747 U CN210530747 U CN 210530747U
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Abstract
The utility model discloses a young foot formula revolves piece concentric reaming with pipe drilling tool, including central drill bit, young foot and revolves piece, bores tooth and spacer pin, central drill bit head end is equipped with two heavy platforms relatively, young foot revolves the piece and sets up in sinking the platform, is equipped with the counter bore along central drill bit axis direction in sinking the platform, and young foot revolves the piece and cooperates with the counter bore through the pivot on it; an arc-shaped limiting groove is formed in the circumference of the rotating shaft, a limiting pin penetrates through the central drill bit along the radial direction of the central drill bit, and the limiting pin and the arc-shaped limiting groove are matched for limiting; a support table is arranged on the inner side surface of the sinking platform, and a support surface is arranged on the side surface of the foot rotary block; drilling teeth are uniformly distributed at the front ends of the central drill bit and the foot rotary block. The utility model aims at providing a concentric reaming with pipe drilling tool of the young piece formula of revolving of foot, this drilling tool adopt the young piece rotary type reaming structure of revolving of foot, through the optimization to the drilling tool structure, have strengthened the intensity of drilling tool, have prolonged the life of drilling tool by a wide margin.
Description
Technical Field
The utility model belongs to the drilling tool field specifically is a concentric reaming with filling pipe drilling tool of young formula of foot spiral piece.
Background
The down-the-hole drill is mainly used in the drilling blasting work under soft rock stratum and covering rock stratum, and the upper rock stratum is soft or has a covering material, so that the formed hole diameter can not be drilled in the drilling blasting, and the down-the-hole drill can be used for deeper drilling work only by fixing and forming in the upper loose rock stratum.
In the drilling work of soft rock stratum and covering rock stratum, because secondary drilling is usually needed or other drilling tools are adopted, the existing pipe-following drilling tool has the problems of unstable structure, low strength, easy damage, short service life, difficult ash discharge and the like in the use process, and therefore the structure of the existing pipe-following drilling tool needs to be improved and optimized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at above problem, a concentric reaming with pipe drilling tool of the young formula of foot revolves piece is provided, and this drilling tool adopts the young rotary type reaming structure of foot, through the optimization to the drilling tool structure, has strengthened the intensity of drilling tool, has prolonged the life of drilling tool by a wide margin.
In order to realize the above purpose, the utility model adopts the technical scheme that: a leg type rotary block concentric reaming pipe following drilling tool comprises a central drill bit, a leg rotary block, drilling teeth and a limiting pin, wherein two sinking platforms are oppositely arranged at the head end of the central drill bit, the leg rotary block is arranged in the sinking platforms, counter bores are arranged in the sinking platforms along the axial direction of the central drill bit, and the leg rotary block is matched with the counter bores through a rotating shaft on the leg rotary block; an arc-shaped limiting groove is formed in the circumference of the rotating shaft, a limiting pin penetrates through the central drill bit along the radial direction of the central drill bit, and the limiting pin and the arc-shaped limiting groove are matched for limiting; a support table is arranged on the inner side surface of the sinking platform, and a support surface is arranged on the side surface of the foot rotary block; drilling teeth are uniformly distributed at the front ends of the central drill bit and the foot rotary block.
Furthermore, the end part of the foot rotary block is provided with a first cambered surface and a second cambered surface.
Furthermore, a concave surface is arranged at the center of the end face of the central drill bit.
Furthermore, a cavity penetrating to the tail end along the axis direction of the central drill bit is arranged in the central drill bit, and a gas blowing hole penetrating into the cavity is formed in the head end of the central drill bit.
Furthermore, an ash discharge groove is arranged at the air blowing hole.
Furthermore, the drill teeth are made of hard alloy.
Furthermore, the shape of the tooth head of the drill tooth is a semispherical shape, a semi-elliptic shape, a conical sphere shape or a semi-elastic tooth shape.
The utility model has the advantages that: this drilling tool adopts the young rotary type reaming structure of turning round the piece of foot, through the optimization to the drilling tool structure, has strengthened the intensity of drilling tool, has prolonged the life of drilling tool by a wide margin. When the young piece of revolving of foot revolutes the rotation axis and rotates maximum aperture in this practicality, the holding surface leans on tightly with a supporting bench contact, prevents effectively that the young piece of revolving of foot from continuing to rotate, has strengthened when central drill bit impels forward, and the drilling tool has the rigidity intensity.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic view of the cross-sectional structure a-a of fig. 1 according to the present invention.
Fig. 3 is a schematic cross-sectional view of B-B in fig. 2 according to the present invention.
Fig. 4 is the structure diagram of the assembly relationship between the foot rotary block and the limit pin of the present invention.
Fig. 5 is a schematic view of the three-dimensional structure of the center drill of the present invention.
The text labels in the figures are represented as: 1. a center drill; 101. sinking a platform; 102. a counter bore; 103. a support table; 104. a concave surface; 11. a cavity; 12. a gas blowing hole; 2. a foot rotary block; 201. a support surface; 202. a first arc surface; 203. a second arc surface; 21. a rotating shaft; 22. an arc-shaped limiting groove; 3. drilling teeth; 4. and a limiting pin.
Detailed Description
In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.
As shown in fig. 1-5, the specific structure of the present invention is: a leg type rotary block concentric reaming pipe following drilling tool comprises a central drill bit 1, a leg rotary block 2, drilling teeth 3 and a limiting pin 4, wherein the tail end of the central drill bit 1 is connected with an impactor, the head end of the central drill bit 1 is relatively provided with two sinking platforms 101, the leg rotary block 2 is arranged in the sinking platforms 101, counter bores 102 are formed in the sinking platforms 101 along the axial direction of the central drill bit 1, and the leg rotary block 2 is matched with the counter bores 102 through a rotating shaft 21 on the leg rotary block; an arc-shaped limiting groove 22 is formed in the circumference of the rotating shaft 21, a limiting pin 4 penetrates through the central drill bit 1 along the radial direction of the central drill bit, namely a pin hole is formed in the central drill bit 1 along the radial direction of the central drill bit, and the limiting pin 4 is matched with the arc-shaped limiting groove 22 for limiting; the inner side surface of the sinking platform 101 is provided with a supporting platform 103, and the side surface of the foot rotary block 2 is provided with a supporting surface 201. When the foot rotary block 2 rotates to the maximum opening degree around the rotating shaft 21, the supporting surface 201 is tightly contacted with the supporting table 103, the foot rotary block 2 is effectively prevented from continuously rotating, the rigidity of the drilling tool is enhanced when the center drill bit 1 is pushed forwards, and the service life of the drilling tool is greatly prolonged.
Drilling teeth 3 are uniformly distributed at the front ends of the central drill bit 1 and the foot rotary block 2. Preferably, the drilling teeth 3 are embedded in the mounting holes at the front ends of the central drill bit 1 and the foot rotary block 2 in a hot pressing interference manner.
Preferably, the end of the foot rotation block 2 is provided with a first arc surface 202 and a second arc surface 203. When the foot rotary blocks 2 rotate to the maximum opening degree around the rotating shaft 21, the first cambered surfaces 202 on the two foot rotary blocks 2 form a first positioning ring, and the second cambered surfaces 203 on the two foot rotary blocks 2 form a second positioning ring, so that when a hole is drilled forwards, the centering precision is high, and the straightness of the hole is good.
Preferably, the center of the end surface of the center drill 1 is provided with a concave surface 104. The first cambered surface 202 and the second cambered surface 203 of the end part of the foot rotary block 2 are matched, so that the centering precision of the punching is further improved, and the straightness of the hole is ensured.
Preferably, a cavity 11 penetrating to the tail end along the axial direction of the center drill bit 1 is arranged in the center drill bit 1, and a blowing hole 12 penetrating into the cavity 11 is arranged at the head end of the center drill bit 1. The tail end of the cavity 11 is connected with an air source, and when pressure air passes through the cavity 11 and the air blowing holes 12, dust generated at the holes is cleaned.
Preferably, an ash discharge groove is arranged at the position of the air blowing hole 12. The chip can be conveniently removed.
Preferably, the drill teeth 3 are made of hard alloy.
Preferably, the shape of the tooth head of the drill tooth 3 is a semispherical shape, a semi-elliptic shape, a conical sphere shape or a semi-elastic tooth shape.
When the punching machine is used specifically, when the impacter is connected with the central drill bit 1 and performs reciprocating impact punching construction while rotating, the pin rotary block 2 rotates by a certain angle in the sinking platform 101 through the rotating shaft 21 to expand outwards to enlarge the diameter of a punched hole, so as to realize hole expansion, and in the rotating process of the rotating shaft 21, the limiting pin 4 is matched with the arc limiting groove 22 for limiting, so that the pin rotary block 2 cannot fall off from the sinking platform 101; after the punching is finished, the impacter pulls the center drill bit 1 to reversely rotate and retreat, and the leg rotary block 2 is recovered in the sinking platform 101 through the rotating shaft 21.
It is worth noting that when the foot rotary block 2 rotates to the maximum opening degree around the rotating shaft 21, the supporting surface 201 is tightly contacted with the supporting platform 103, so that the foot rotary block 2 is effectively prevented from continuously rotating, the rigidity of the drilling tool is enhanced when the center drill bit 1 is pushed forwards, and the service life of the drilling tool is greatly prolonged.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.
Claims (7)
1. A young foot type revolves concentric reaming of piece and follows a tub drilling tool, includes central drill bit (1), young foot revolves piece (2), bores tooth (3) and spacer pin (4), circlip, characterized by that, the head end of central drill bit (1) is equipped with two heavy platforms (101) relatively, young foot revolves piece (2) and sets up in heavy platform (101), is equipped with counter bore (102) along central drill bit (1) axis direction in the heavy platform (101), young foot revolves piece (2) and cooperates with counter bore (102) through the pivot (21) on it; an arc-shaped limiting groove (22) is formed in the circumference of the rotating shaft (21), a limiting pin (4) penetrates through the central drill bit (1) along the radial direction of the central drill bit, and the limiting pin (4) is matched with the arc-shaped limiting groove (22) for limiting; a support table (103) is arranged on the inner side surface of the sinking platform (101), and a support surface (201) is arranged on the side surface of the leg rotating block (2); drilling teeth (3) are uniformly distributed at the front ends of the central drill bit (1) and the foot rotary block (2).
2. The young foot type rotary block concentric reaming and pipe following drill tool is characterized in that a first cambered surface (202) and a second cambered surface (203) are arranged at the end parts of the young foot type rotary blocks (2).
3. A leg-type rotary block concentric reaming simultaneous casing drilling tool according to claim 1 or 2, characterized in that a concave surface (104) is arranged at the center of the end surface of the central drilling head (1).
4. The leg type rotary block concentric reaming and pipe following drilling tool according to claim 1, characterized in that a cavity (11) penetrating to the tail end along the axial direction of the central drilling bit (1) is arranged in the central drilling bit (1), and a gas blowing hole (12) penetrating into the cavity (11) is arranged at the head end of the central drilling bit (1).
5. The leg type rotary block concentric reaming casing drilling tool according to claim 4, characterized in that an ash discharge groove is arranged at the air blowing hole (12).
6. The leg type rotary block concentric reaming casing drilling tool according to claim 1, characterized in that the drilling teeth (3) are made of hard alloy.
7. The leg type rotary block concentric reaming casing following drilling tool according to claim 1, characterized in that the shape of the tooth head of the drilling tooth (3) is semispherical, semi-elliptic, conical spherical or semi-elastic tooth shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921279232.XU CN210530747U (en) | 2019-08-08 | 2019-08-08 | Foot-type rotary-block concentric reaming and pipe-following drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921279232.XU CN210530747U (en) | 2019-08-08 | 2019-08-08 | Foot-type rotary-block concentric reaming and pipe-following drilling tool |
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| Publication Number | Publication Date |
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| CN210530747U true CN210530747U (en) | 2020-05-15 |
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| CN201921279232.XU Active CN210530747U (en) | 2019-08-08 | 2019-08-08 | Foot-type rotary-block concentric reaming and pipe-following drilling tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252981A (en) * | 2020-09-29 | 2021-01-22 | 湖南新金刚工程机械有限公司 | Foot-type rotary-block concentric reaming and pipe-following drilling tool |
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2019
- 2019-08-08 CN CN201921279232.XU patent/CN210530747U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252981A (en) * | 2020-09-29 | 2021-01-22 | 湖南新金刚工程机械有限公司 | Foot-type rotary-block concentric reaming and pipe-following drilling tool |
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