CN110469268B - Expanding bit and drilling tool - Google Patents
Expanding bit and drilling tool Download PDFInfo
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- CN110469268B CN110469268B CN201910866441.2A CN201910866441A CN110469268B CN 110469268 B CN110469268 B CN 110469268B CN 201910866441 A CN201910866441 A CN 201910866441A CN 110469268 B CN110469268 B CN 110469268B
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- 238000005553 drilling Methods 0.000 title claims abstract description 61
- 230000005540 biological transmission Effects 0.000 claims description 75
- 230000000670 limiting effect Effects 0.000 claims description 56
- 238000005520 cutting process Methods 0.000 claims description 16
- 230000008093 supporting effect Effects 0.000 abstract description 18
- 239000003245 coal Substances 0.000 abstract description 12
- 230000002708 enhancing effect Effects 0.000 abstract 1
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- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 17
- 238000004873 anchoring Methods 0.000 description 12
- 238000010276 construction Methods 0.000 description 7
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- 230000002829 reductive effect Effects 0.000 description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
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- 241000018646 Pinus brutia Species 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
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- 229910052619 chlorite group Inorganic materials 0.000 description 1
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the field of drilling equipment, and provides a reaming bit and a drilling tool. The reaming bit comprises a drilling body and a reaming bit body, the reaming bit body comprises a connecting piece, a reaming cutter body and a rotating part, the reaming cutter body is rotatably connected to the connecting piece, the reaming cutter body is arranged on the periphery of the rotating part, and the rotating part is fixedly connected with the drilling body; when the reaming cutter body is in a closed state and needs to be reamed, the rotating part rotates reversely and drives the reaming cutter body to rotate and open relative to the connecting piece, and the reaming cutter body is kept in an open state and rotates synchronously with the rotating part; when the reaming cutter body is in an open state and under the condition that reaming needs to be finished, the rotating component rotates forwards and drives the reaming cutter body to rotate and close relative to the connecting piece. The reaming drill bit and the drilling tool have the advantages of simple reaming operation and simple structure, are suitable for coal mines and geotechnical engineering, and are used for enhancing the supporting effect of the anchor rods and the anchor cables.
Description
Technical Field
The invention relates to the technical field of drilling and excavating equipment, in particular to a reaming bit and a drilling tool.
Background
Anchor rod-anchor cable supports have been used in coal mines and geotechnical engineering in a wide range, and anchor rods-anchor cables are generally anchored with resin anchoring agents or cement mortar. The geological conditions of coal mine tunnel and geotechnical engineering construction are different, and the surrounding rock of the coal mine tunnel is mainly sedimentary rock or coal bed. Wherein, have weak intermediate layer in the country rock, content such as kaolin, chlorite is higher in the mud rock to sedimentary rock intensity is lower, makes the country rock meet water easy argillization deformation and creep deformation, causes stock anchor rope hole to warp, and the anchor strength of anchor body such as stock anchor rope can descend gradually, and then causes the anchor power to descend. With the increase of time, the anchoring force is insufficient, so that the support failure of the anchor rod and the anchor cable is easily caused, the roadway is seriously deformed, the tunneling and the like of the roadway are seriously influenced, serious potential safety hazards are formed, and the site safety and the construction speed are seriously influenced.
Aiming at the problems of poor supporting effect and failure caused by rock mass breakage and soft rock development in surrounding rocks, roadway surrounding rocks are subjected to supplementary supporting by means of repeated roadway repairing and supplementary anchor rod and anchor cable beating on site, so that the supporting effect of a roadway is guaranteed. A large amount of work to repair the roadway also results in a large increase in labor costs.
In addition, the roadway support repairing method has the following problems:
(1) at present, the roadway is seriously deformed due to the development of soft rock of the roadway, secondary supplementary support is mostly carried out, anchor rods and anchor cables are additionally arranged aiming at the roadway at a damaged section, and the reinforcement treatment is carried out in a way of brushing the roadway at the section of the roadway or grouting, so that a great deal of waste of support materials and higher labor cost are caused.
(2) The roadway is brushed for many times after being deformed, the potential safety hazard is large in the construction process, after the roadway is deformed, part of surrounding rock is broken, secondary supplementary supporting is carried out, an effective supporting structure cannot be formed, the active supporting effect of the anchor rod and the anchor cable is reduced, and the overall supporting effect of the roadway is poor.
(3) Along with the increase of coal mining degree of depth, ground stress is bigger and bigger, and soft rock is more and more growing, and the condition that the tunnel support became invalid is more and more caused by surrounding rock creep, and effectual supporting effect can not be guaranteed to general stock anchor rope supporting construction, causes the tunnel support effect to be more and more poor.
Based on the above, the deformation of the anchor rod and the anchor cable hole is easily deformed due to the influences of the argillization deformation, the creep deformation and the like of surrounding rocks, the supporting effect of the anchor rod and the anchor cable is influenced, and the requirement of safety support cannot be met.
Disclosure of Invention
The present invention is directed to a reamer bit and a drilling tool, which solve one of the problems of the prior art or the related art.
In order to solve the above technical problems, an embodiment of the present invention provides a reamer bit, including a drilling bit body and a reaming bit body,
the reaming drill body comprises a connecting piece, a reaming cutter body and a rotating part, the reaming cutter body is rotationally connected to the connecting piece, the reaming cutter body is arranged on the periphery of the rotating part, and the rotating part is fixedly connected with the drilling drill body;
when the reaming cutter body is in a closed state and needs to be reamed, the rotating part rotates reversely and drives the reaming cutter body to rotate and open relative to the connecting piece, and the reaming cutter body is kept in an open state and rotates synchronously with the rotating part; when the reaming cutter body is in an open state and under the condition that reaming needs to be finished, the rotating component rotates forwards and drives the reaming cutter body to rotate and close relative to the connecting piece.
In one embodiment, the rotating component includes a transmission shaft and a transmission block, the transmission shaft is fixedly connected to the drilling bit, the transmission block is disposed on the periphery of the transmission shaft and rotates synchronously with the transmission shaft, the reaming cutter body is disposed on the periphery of the transmission block, and the transmission block drives the reaming cutter body to rotate relative to the connecting member.
In one embodiment, the side surface of the transmission block facing the reaming cutter body is an outer convex curved surface, the reaming cutter body is provided with an inner concave curved surface matched with the outer convex curved surface, and the curvature radius of the outer convex curved surface is different from that of the inner concave curved surface.
In one embodiment, the transmission blocks are uniformly distributed on the circumferential direction of the transmission shaft, the number of the reaming cutter bodies is the same as that of the transmission blocks, and the transmission blocks and the reaming cutter bodies are combined to form a cylindrical structure.
In one embodiment, the reamer body has a first end rotatably connected to the connector and a second end having a cutting portion extending a set length in a radial direction of the drive shaft.
In one embodiment, the reamer body has a thickness and/or width that gradually increases from the first end to the second end.
In one embodiment, the connecting piece and the reaming cutter body are provided with a rotation limiting structure which is matched with each other, the rotation limiting structure comprises a limiting block and a limiting groove, the limiting groove extends along the opening and closing direction of the reaming cutter body, and the limiting block is arranged in the limiting groove.
In one embodiment, the connecting piece is a cylindrical shell, an opening is formed in the circumferential direction of the connecting piece, and the shape and the position of the opening correspond to those of the reaming cutter body.
In one embodiment, the reamer bit further comprises a connecting section, one end of the connecting section is connected with the rotating part, the other end of the connecting section is used for being connected with the output end of the power device, and the connecting section is provided with a limiting structure which is used for limiting the connecting section at the output end of the power device in the circumferential direction and the axial direction.
According to another embodiment of the present invention, there is also provided a drilling tool, including a power device and the reamer head, wherein the power device provides rotational power, and the connecting section is connected to an output end of the power device.
Compared with the prior art, one or more technical schemes in the embodiment of the invention have one of the following technical effects:
the reaming drill bit comprises a drilling body and a reaming drill body, wherein the reaming drill body comprises a connecting piece, a reaming cutter body and a rotating part, and the reaming cutter body can be rotated out relative to the connecting piece and reamed by adjusting the rotating direction of the rotating part; the rotating direction of the rotating part is adjusted again, the rotating part drives the reaming cutter body to return to a closed state, and reaming is finished, so that drilling can be carried out; the reaming process can be carried out independently and can also be carried out simultaneously with the drilling process; the whole structure is simple, the stress is balanced, the operation is simple and convenient, and the service life is long.
When the reaming bit of the embodiment is applied to coal mines and geotechnical engineering, a reaming structure with a certain length is formed at a position where an anchoring agent needs to be installed, so that the contact area of the anchoring agent is increased, and the anchoring performance of an anchor rod and an anchor cable is improved; the problem of poor anchor rod and anchor cable supporting effect can be solved without changing construction equipment.
Drawings
Fig. 1 is a schematic structural view of a reamer bit according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;
fig. 3 is a partial sectional view of a connection element and a rotation element of a reamer head according to an embodiment of the present invention;
in the figure, 1, a drill body is drilled; 2. a drilling cutter body; 3. a reaming drill body; 4. reaming the cutter body; 5. a drill stem; 6. a connecting section; 7. connecting a limiting part; 8. a limiting block; 9. a connecting shaft; 10. a limiting groove; 11. a drive shaft; 12. a transmission block; 13. a connecting member; 14. a cutting section; 15. and a guide groove.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
In addition, in the description of the present invention, "a plurality", and "a plurality" mean two or more unless otherwise specified.
Referring to fig. 1 to 3, an embodiment of the present invention provides a reamer bit, which includes a drilling body 1 and a reaming body 3, wherein the reaming body 3 includes a connecting member 13, a reaming body 4 and a rotating member, the reaming body 4 is disposed at an outer periphery of the rotating member, and the rotating member is fixedly connected to the drilling body 1; when the reaming cutter body 4 is in a closed state and needs to be reamed, the rotating part rotates reversely and drives the reaming cutter body 4 to rotate and open relative to the connecting piece 13, and the reaming cutter body 4 is kept in an open state and rotates synchronously with the rotating part; when the reamer body 4 is in the open state and the reaming needs to be finished, the rotating part rotates forward and drives the reamer body 4 to rotate and close relative to the connecting part 13.
Wherein, the reaming cutter body 4 is in a closed state: the reaming cutter body 4 is positioned in the hole diameter range of the drilling body 1, and the reaming cannot be carried out; the reaming cutter body 4 is in an open state: after the reaming cutter body 4 is rotated and opened, the reaming cutter body is positioned outside the hole diameter range of the drilling drill body 1, namely, the reaming cutter body 4 extends into the wall surface of the drilling hole, and reaming can be carried out.
The drilling body 1 is drilled to cut off rock mass in the drilling process to form a drilled hole; wherein, the drilling body 1 is provided with a drilling cutter body 2, and the drilling cutter body 2 drills in the drilling process. When reaming is needed, namely when the reaming drill body 3 reaches the reaming position, the rotating part drives the reaming cutter body 4 to open and carries out reaming drilling; when reaming is finished, the rotating part can also drive the reaming cutter body 4 to rotate and return to a closed state.
Specifically, referring to fig. 2 and 3, when the reaming drill body 3 is required to perform reaming, the reaming cutter body 4 needs to be changed from a closed state to an open state, at this time, the rotating part rotates reversely and drives the reaming cutter body 4 to rotate and open relative to the connecting part 13, the reaming cutter body 4 is opened to a position extending into the wall surface of the drill hole, the rotating part provides radial support for the reaming cutter body 4, and the rotating part is limited to the reaming cutter body 4, the reaming cutter body 4 is subjected to resistance of the wall surface of the drill hole and keeps a relatively static state with the connecting part 13, that is, the reaming cutter body 4, the connecting part 13 and the rotating part keep relatively static and rotate synchronously to perform rotary reaming.
Meanwhile, the drilling drill body 1 is fixed with the rotating part, and the drilling drill body 1 also rotates synchronously with the rotating part, namely the drilling process and the reaming process can be synchronously carried out.
When reaming needs to be finished, the reaming cutter body 4 needs to be changed from an open state to a closed state, the rotating part rotates forwards, the rotating part drives the reaming cutter body 4 to rotate relative to the connecting piece 13 and restore to the closed state, and the end part of the reaming cutter body 4 does not contact with the wall surface of the drilled hole. The recovery operation of the reamer body 4 is simple and convenient, and the entire structure of the reamer head is simplified.
When the drill body 1 needs to be drilled for independent drilling (namely the reaming cutter body 4 is in a closed state), the rotating part continues to rotate forwards, the reaming cutter body 4 and the connecting piece 13 keep relatively static, the reaming cutter body 4 carries out circumferential limiting on the rotating part, namely the reaming cutter body 4 and the connecting piece 13 keep relatively static with the rotating part, and the reaming cutter body 4, the connecting piece 13 and the rotating part rotate synchronously; because the drilling drill body 1 is fixedly connected with the rotating part, the drilling drill body 1 and the reaming drill body 3 also synchronously rotate, but the reaming cutter body 4 is in a closed state, reaming cannot be carried out, and the drilling drill body 1 carries out independent drilling.
By switching the forward and reverse rotation of the rotating part, the reaming bit can enter a reaming state at any time, the adjustment is flexible, and the reaming process and the drilling process can be carried out simultaneously; and reaming cutter body 4 rotates to remove and adjusts in a flexible way, and the rotating part provides radial supporting acting force for reaming cutter body 4, makes reaming cutter body 4 more stable at the brill in-process that digs, and simple structure.
The reaming drill bit of the embodiment can be used in various fields such as coal mines, petroleum and building construction, is particularly suitable for drilling and reaming in the process of anchor rod and anchor cable support in coal mines and geotechnical engineering, and can be set according to the requirement in size specification.
When the embodiment is applied to coal mines and geotechnical engineering, the method is mainly used for solving the problems of insufficient anchoring force and anchoring failure caused by surrounding rock crushing or soft rock development of the coal mines and the geotechnical engineering. After the hole expanding drill bit is adopted, the hole expanding drill bit can perform hole expanding drilling and excavation on a rock stratum with broken surrounding rocks or soft rocks, so that an anchoring agent or grouting is added to the rock stratum with broken surrounding rocks or soft rocks to improve the anchoring performance of the anchor rod and the anchor cable, and the problem of poor supporting effect of the anchor rod and the anchor cable can be solved without changing construction machines; the anchoring force of the anchor rod and the anchor cable is improved, the supporting effect of surrounding rock is guaranteed, the repairing cost can be reduced, and the overall safety is improved.
Therefore, the reaming bit of the embodiment can effectively reduce the potential safety hazard in the maintenance process after the roadway is deformed, prolong the service time of the anchor rod and anchor cable, and particularly, along with the increase of the coal mining depth, the ground stress level is higher and higher, and the soft rock characteristics of surrounding rocks are more and more obvious under the influence of ground stress, water, ground temperature and the like. At the position that needs to supply the anchoring agent, form the reaming structure of certain length, increased the area of contact of anchoring agent, improved the anchor performance of stock anchor rope, more help exerting the initiative supporting effect of stock anchor rope, greatly reduced the rate of reprocessing of on-the-spot tunnel, improved the supporting effect of country rock, reduced construction cost, guaranteed the supporting effect of soft rock stratum tunnel.
In the following, embodiments of the rotating member are provided.
The rotating part comprises a transmission shaft 11 and a transmission block 12, the transmission shaft 11 is fixedly connected with the drilling body 1, the transmission block 12 is arranged on the periphery of the transmission shaft 11 and rotates synchronously with the transmission shaft 11, the reaming cutter body 4 is arranged on the periphery of the transmission block 12, and the transmission block 12 can drive the reaming cutter body 4 to rotate and open or close relative to the connecting piece 13.
Wherein, the realization mode that transmission piece 12 and transmission shaft 11 synchronous revolution include at least:
first, transmission block 12 fixed connection transmission shaft 11 forms the integral type structure, and the integral type structure can improve transmission block 12 and 11 synchronous motion's of transmission shaft accuracy, and simple structure.
The second kind, transmission block 12 is independent of transmission shaft 11, and transmission shaft 11's radial connection has a limiting plate, and the limiting plate is spacing to the circumference both ends of transmission block 12, makes transmission shaft 11 can drive transmission block 12 synchronous rotation, guarantees the independence between each part simultaneously.
Further, the side surface of the transmission block 12 facing the reaming cutter body 4 is an outward convex curved surface, the reaming cutter body 4 is provided with an inward concave curved surface matched with the outward convex curved surface, and the curvature radius of the outward convex curved surface is different from that of the inward concave curved surface; during reaming, the convex curved surface of the transmission block 12 rotates and abuts against the concave curved surface of the reaming cutter body 4. The transmission shaft 11 rotates reversely to enable the outer convex curved surface to be abutted to the inner concave curved surface, and the transmission block 12 pushes the reaming cutter body 4 to rotate and move out. When the transmission shaft 11 rotates forward, the transmission block 12 drives the reaming cutter body 4 to recover. The shifting-out and the recovery of the reaming cutter body 4 are realized by matching the transmission block 12 with the transmission shaft 11, the reset structure does not need to be additionally arranged, and the structure is simplified.
The contact area between the convex curved surface and the concave curved surface is large, and even if the convex curved surface or the concave curved surface is abraded in the using process, the influence on the moving-out and recovery processes of the reaming cutter body 4 is not large.
The shape of the convex curved surface is similar to that of the concave curved surface, and the concave curved surface surrounds the convex curved surface. The curvature radius of the convex curved surface gradually changes, and the change mode of the curvature radius of the convex curved surface at least comprises: from small to large, from large to small, from small to large and then from large to small, and from large to small to large. The curvature radius of the concave curved surface is gradually changed according to the same rule.
Preferably, as shown in fig. 2, the radius of curvature of the convex curved surface of the transmission block 12 is decreased from large to small, the end with the large radius of curvature of the convex curved surface corresponds to the first end of the reamer body 4, and the end with the small radius of curvature of the convex curved surface corresponds to the second end of the reamer body 4. In addition, the radial dimension of the transmission block 12 is also decreased from the first end to the second end of the reamer body 4, so as to ensure that the reamer body 4 has a sufficient installation space. Wherein, the first end of reaming cutter body 4 rotates to be connected in connecting piece 13, and the second end of reaming cutter body 4 sets up cutting part 14, and cutting part 14 is used for the drilling.
In addition, the transmission block 12 can also be a block with a cross section in various shapes such as triangle, polygon and special shape, and the block structure capable of pushing out the reaming cutter body 4 in a rotating manner and driving the reaming cutter body 4 to recover in a rotating manner can be obtained, and the details are omitted here.
Further, the transmission blocks 12 are uniformly distributed on the circumference of the transmission shaft 11, the number of the reaming cutter bodies 4 is the same as that of the transmission blocks 12, the plurality of reaming cutter bodies 4 are drilled and dug simultaneously, the drilling and digging efficiency is high, and the uniform stress of all parts is facilitated.
As shown in fig. 2, three transmission blocks 12 are provided, three reaming cutter bodies 4 are also provided, and the transmission blocks 12 and the reaming cutter bodies 4 are uniformly distributed in the circumferential direction of the transmission shaft 11, so that the transmission shaft 11, the transmission blocks 12, the connecting member 13 and the reaming cutter bodies 4 are uniformly stressed. Furthermore, the transmission shaft 11, the transmission block 12 and the reaming cutter body 4 are combined to form a cylindrical structure, and the connecting piece 13 is a shell sleeved outside the cylindrical structure and plays a role in protecting internal components.
Next, an embodiment of the reamer body 4 is provided.
As shown in fig. 2, the reamer body 4 is rotatably connected to the connecting member 13 at a first end thereof, and is provided with a cutting portion 14 at a second end thereof, the cutting portion 14 extends along the radial direction of the transmission shaft 11 by a set length, and the cutting portion 14 performs drilling and reaming. The cutting part 14 extends along the radial direction, the stress of the cutting part 14 is balanced in the rotating and reaming process, the contact area of the cutting part 14 and the wall surface is large, and the reaming effect is good.
The first end of reaming cutter body 4 is equipped with first shaft hole, and the corresponding position of connecting piece 13 is equipped with the second shaft hole, and the installation of the reaming cutter body 4 of being convenient for is connected first shaft hole of connecting axle 9 through-going and second shaft hole. In addition, the connecting shaft 9 and the connecting piece 13 can be integrally formed, and the reaming cutter body 4 is provided with a first shaft hole; similarly, the connecting shaft 9 can be integrally formed with the reaming cutter body 4, and the connecting piece 13 is provided with a second shaft hole; the part integration is high, reduces part quantity.
Further, the thickness and/or width of the reamer body 4 increases gradually from the first end to the second end, so that the cutting portion 14 has a sufficiently large volume and the overall strength of the cutting portion 14 is improved.
In one case, as shown in fig. 1, the reamer body 4 has a height that gradually increases from the first end to the second end. Alternatively, as shown in fig. 2, the reamer body 4 may have a width that gradually increases from the first end to the second end. The progressive structure of the reamer body 4 comprises at least one of the two conditions described above.
Further, the connecting piece 13 and the reaming cutter body 4 are provided with a rotation limiting structure, the rotation limiting structure limits the rotation-out and recovery angles of the reaming cutter body 4, and the size range of reaming can be adjusted through the rotation limiting structure. The rotation limiting structure comprises a limiting block 8 and a limiting groove 10, the limiting groove 10 extends along the opening and closing direction of the reaming cutter body 4, the limiting block 8 is arranged in the limiting groove 10, the reaming cutter body 4 is convenient to move out smoothly, and the moving-out process of the reaming cutter body 4 is guided.
As shown in fig. 2, the limiting block 8 is disposed on the connecting member 13, and the limiting groove 10 is disposed on the reamer body 4. In addition, the limiting block 8 can be arranged on the reaming cutter body 4, and the limiting groove 10 is formed in the connecting piece 13.
Further, a guide groove 15 is formed in the reaming cutter body 4, and the guide groove 15 is used for guiding out drill cuttings. The guide groove 15 is opened on the top surface of the reamer body 4, and the guide groove 15 extends outward along the inner side of the reamer body 4, and the guide groove 15 becomes gradually larger from the inner side to the outer side. Wherein, the inner side is the side close to the concave curved surface, and the outer side is the side far away from the concave curved surface.
Next, an embodiment of the connecting member 13 is provided.
Referring to fig. 1 and 3, the connecting member 13 is a cylindrical housing, and the connecting member 13 is provided with an opening in the circumferential direction, and the shape and position of the opening correspond to the reamer body 4, so that the reamer body 4 can be moved out along the opening. The reaming cutter body 4, the transmission block 12 and the transmission shaft 11 are covered and buckled in the connecting piece 13, so that the functions of protecting all parts are achieved; during reaming, the connector 13 prevents drill cuttings from entering it, reducing the interference of the drill cuttings with the components of the reaming body 3.
The connecting member 13 is formed in a cylindrical structure, such as a cylindrical structure or a prismatic structure, and it can be understood that the reaming bit body 3 is formed in a cylindrical structure, which facilitates the uniform distribution of the reaming bit body 4 and the uniform stress during the reaming process. To ensure the extended length of the reamer body 4 and also to prevent damage to the reamer body 4 during reaming, the end of the connector 13 and the adjacent position of the reamer body 4 are maintained at a consistent radius of curvature.
The radial dimension of the connecting piece 13 is not larger than the radial dimension of the drilling body 1, and the reaming drilling body 3 has no interference to the drilling body 1 in the drilling process of the drilling body 1, so that the drilling body 1 is ensured to stably drill.
As shown in fig. 3, the transmission shaft 11 penetrates through the connecting member 13, and at least one end of the connecting member 13 is rotatably connected with the transmission shaft 11 and can be connected through a bearing, so that the frictional resistance is reduced.
In the following, examples of the structure of the connection segment 6 are provided:
the reamer bit further comprises a coupling section 6, one end of the coupling section 6 being coupled to the drive shaft 11 of the rotatable member and the other end being adapted to be coupled to a power means (i.e. the power means output of the drilling tool, such as the drill rod 5) for providing rotational power to the drilling body 1 and the reaming body 3.
In addition, the connecting section 6 can also be provided with a threaded part, and the threaded part is matched with a limiting structure to carry out double limiting.
The connecting section 6 can be in a shaft structure or a shaft sleeve structure, and when the connecting section 6 is in the shaft structure, the connecting section 6 is inserted into the output end of the power device; when the connecting section 6 is of a shaft sleeve structure, the connecting section 6 is sleeved at the output end of the power device.
In another embodiment of the present invention, as shown in fig. 1-3, there is provided a drilling tool comprising a power unit and a reamer head, wherein the connecting section 6 is connected to an output end of the power unit.
Wherein the output end of the power device is generally a drill rod 5 connected to a motor. When the drilling depth is small, the reamer bit can be directly connected to an output shaft of power equipment, such as an output shaft of a motor.
Furthermore, 6 circumference of linkage segment and axial are spacing in power device's output, and under power device was in the condition of just reversing the regulation, the stability of being connected of reamer bit and power equipment output was guaranteed, prevented that the reamer bit from taking off.
When the drilling tool of this embodiment is applied to the brill in stock anchor rope hole and digs the process, through reaming in the drilling, formed the reaming anchor of stock anchor rope, improved the anchor effect of mud rock and the soft rock of high stress greatly, reduced the tunnel and reprocessed the rate, guarantee tunnel and personnel safety, improve the effect of strutting in tunnel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A hole expanding drill bit is characterized by comprising a drilling drill body and a hole expanding drill body,
the reaming drill body comprises a connecting piece, a reaming cutter body and a rotating part, the reaming cutter body is rotationally connected to the connecting piece, the reaming cutter body is arranged on the periphery of the rotating part, and the rotating part is fixedly connected with the drilling drill body;
when the reaming cutter body is in a closed state and needs to be reamed, the rotating part rotates reversely and drives the reaming cutter body to rotate and open relative to the connecting piece, and the reaming cutter body is kept in an open state and rotates synchronously with the rotating part; when the reaming cutter body is in an open state and reaming needs to be finished, the rotating component rotates forwards and drives the reaming cutter body to rotate and close relative to the connecting piece;
the rotating part comprises a transmission shaft and a transmission block, the transmission shaft is fixedly connected with the drilling body, the transmission block is arranged on the periphery of the transmission shaft and rotates synchronously with the transmission shaft, the reaming cutter body is positioned on the periphery of the transmission block, and the transmission block drives the reaming cutter body to rotate relative to the connecting piece; the periphery of the connecting piece is provided with an opening, the shape and the position of the opening correspond to the reaming cutter body, and the reaming cutter body, the transmission block and the transmission shaft cover are buckled in the connecting piece.
2. The reamer bit of claim 1, wherein the side of the transmission block facing the reamer body is a convex curved surface, the reamer body is provided with a concave curved surface matching the convex curved surface, and the radius of curvature of the convex curved surface is different from that of the concave curved surface.
3. The reamer bit of claim 1, wherein the transmission blocks are uniformly distributed in the circumferential direction of the transmission shaft, the number of the reamer bodies is the same as that of the transmission blocks, and the transmission blocks and the reamer bodies are combined to form a cylindrical structure.
4. The reamer bit of claim 1, wherein the reamer body has a first end rotatably connected to the connector and a second end having a cutting portion extending a set length in a radial direction of the drive shaft.
5. The reamer bit of claim 4, wherein the thickness and/or width of the reamer body increases progressively from the first end to the second end.
6. The reamer bit of claim 1, wherein the connecting member and the reamer body are provided with a rotation limiting structure adapted to each other, the rotation limiting structure comprises a limiting block and a limiting groove, the limiting groove extends along an opening and closing direction of the reamer body, and the limiting block is disposed in the limiting groove.
7. The reamer bit of claim 1, wherein the connector is a cylindrical shell.
8. The reamer bit of claim 1, further comprising a connecting section, wherein one end of the connecting section is connected with the rotating component, the other end of the connecting section is used for connecting with an output end of the power device, the connecting section is provided with a limiting structure, and the limiting structure is used for limiting the connecting section at the output end of the power device in the circumferential direction and the axial direction.
9. A drilling tool comprising a power unit and a reamer head according to any one of claims 1 to 8, the power unit providing rotational power, in which case the reamer head further comprises a connecting section, one end of which is connected to the rotating member and the other end of which is connected to an output of the power unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910866441.2A CN110469268B (en) | 2019-09-12 | 2019-09-12 | Expanding bit and drilling tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910866441.2A CN110469268B (en) | 2019-09-12 | 2019-09-12 | Expanding bit and drilling tool |
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| Publication Number | Publication Date |
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| CN110469268A CN110469268A (en) | 2019-11-19 |
| CN110469268B true CN110469268B (en) | 2021-05-28 |
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| CN201910866441.2A Active CN110469268B (en) | 2019-09-12 | 2019-09-12 | Expanding bit and drilling tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115434641B (en) * | 2022-09-05 | 2024-08-23 | 四川大学 | Miniature pile pore-forming drilling machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3938344A (en) * | 1974-04-29 | 1976-02-17 | Kabushiki Kaisha Takechi Koumusho | Earth auger and method for driving piles and the like by means of said earth auger |
| JPH112085A (en) * | 1997-04-18 | 1999-01-06 | Nippon Concrete Ind Co Ltd | Excavating device |
| CN1184874A (en) * | 1997-12-30 | 1998-06-17 | 张佩生 | Variable stiffness pile bore hole expanding machine |
| JP2003041877A (en) * | 2001-07-31 | 2003-02-13 | Nippon Beesu Kk | Excavation head |
| JP5520018B2 (en) * | 2009-11-30 | 2014-06-11 | 憲二 籠田 | Drilling tools |
| CN102505919A (en) * | 2011-12-29 | 2012-06-20 | 山河智能装备股份有限公司 | Bearizing drilling bit |
| CN103967418B (en) * | 2014-05-05 | 2017-01-18 | 天地科技股份有限公司 | Reamer bit and anchoring method for anchor rod |
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