CN215332851U

CN215332851U - Circular cutting drilling tool

Info

Publication number: CN215332851U
Application number: CN202120363762.3U
Authority: CN
Inventors: 杨城茏
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-12-28
Anticipated expiration: 2031-02-08

Abstract

The utility model provides a circular cutting drilling tool, and belongs to the technical field of drilling tools. The drilling tool solves the problems of poor stability, low transmission efficiency and high cost of the existing drilling tool. The circular cutting drilling tool comprises a drilling frame, a supporting barrel which is arranged on the drilling frame and can axially move, and a drilling barrel which is coaxially arranged with the supporting barrel and can move along with the supporting barrel, wherein a guide positioning column driven by a power assembly is coaxially arranged in the drilling barrel in a penetrating manner, the drilling barrel is circumferentially limited and axially matched with the guide positioning column in a sliding manner through a linkage assembly, and a stabilizing assembly used for preventing the drilling barrel from shaking is arranged on the guide positioning column. The drill barrel is effectively supported through the stabilizing disc, the drill barrel is prevented from shaking, the drill barrel cannot deviate from the axial position, the stability is good, the transmission efficiency is high, and the cost is low.

Description

Circular cutting drilling tool

Technical Field

The utility model belongs to the technical field of drilling tools, and relates to a circular cutting drilling tool.

Background

In the prior art, tunneling is a common means of non-blasting excavation of rocks, namely, a horizontal circular seam drilling machine is used for drilling circular seams on the tunnel face of the rocks to break the rock boundary, so that the rocks are favorably stripped. In the tunneling construction of the drilling machine, the head part of the drill cylinder of the circular seam drilling machine is provided with the drill teeth, and the tail part of the drill cylinder is provided with the driving shaft, so when a rock core is broken in the drill cylinder, the rock core can only be taken out from the head part of the drill cylinder, but the drill teeth at the head part of the drill cylinder clamp the rock core when the rock core is taken out, so that the rock core is difficult to take out, and certain construction troubles exist.

Therefore, the Chinese patent discloses a circular seam coring and drilling device with a water-passing spiral drill cylinder (application publication number is CN 112031687A), which comprises a drill bit seat, a first rotary motor, a rotary mandrel, a drill cylinder and a coring bit, wherein the drill cylinder is formed by spirally winding at least two pipelines, a down-the-hole bit is arranged in the drill cylinder, the front end of the down-the-hole bit can be abutted against a rock wall for positioning before drilling, and the problem that the drilling bit slips and is askew when drilling is started is avoided; when the drill cylinder retracts, the down-the-hole drill bit can break the drill cylinder and the inner core in the core bit completely and push the core bit out.

The circular seam coring and drilling device has the following problems: the drill cylinder is long, the front end of the drill cylinder can shake during drilling, so that the drill cylinder deviates from the axial position and is poor in stability; although the pre-drilling positioning can be performed by the down-the-hole drill bit, the positioning is an initial positioning, an accurate drilling position is found for the drill cylinder, and the purpose of supporting the drill cylinder is not achieved. In addition, most of the existing drilling tools adopt a hydraulic motor as a power assembly, the hydraulic motor is driven by a motor, the transmission efficiency is low, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provides a circular cutting drill with high transmission efficiency.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a circular cutting drilling tool, includes the drill jig, locate on the drill jig and but axial motion's a support section of thick bamboo and with support the coaxial setting of a section of thick bamboo and can be along with the brill section of thick bamboo that supports a concerted movement, bore coaxial wearing to be equipped with in the section of thick bamboo by the driven direction reference column of power component, bore a section of thick bamboo through linkage subassembly and the spacing and endwise slip cooperation of direction reference column circumference, be equipped with the stabilizing component who is used for preventing to bore a section of thick bamboo and rocks on the direction reference column.

Under the action of the power assembly, the guide positioning column rotates around the central axis of the guide positioning column, the drill cylinder is driven to synchronously rotate along with the guide positioning column through the transmission action of the linkage assembly, the axial position of the drill cylinder is controlled, and the drill cylinder is drilled and withdrawn. The stabilizing component can effectively support the drill barrel, prevents the drill barrel from shaking, does not deviate from the axial position, and has good stability.

In the circular cutting drilling tool, a shaft hole is formed in the guide positioning column, a drill rod is coaxially arranged in the shaft hole in a penetrating mode, a drill bit is arranged at the front end of the drill rod, axial positioning is achieved between the drill rod and the guide positioning column through a first bearing, and a transmission assembly used for enabling the drill rod to rotate around the central axis of the drill rod is further arranged between the drill rod and the guide positioning column.

Before the drill barrel drills, the guide positioning column moves forwards and drives the drill rod to move forwards, the rotation of the guide positioning column is transmitted to the drill rod through the transmission assembly, the drill rod is driven to rotate, and the drill bit drills a positioning hole in the rock surface. The stabilizing assembly is located the front end of direction reference column, and the drill bit is located stabilizing assembly's front end, and when the drill bit creeps into, the direction reference column continues the antedisplacement, and until stabilizing assembly and locating hole cooperation back, the direction reference column just stops the antedisplacement. Through drilling out the locating hole on the rock face, can improve the stability of direction reference column, and then improve the stability of stabilizing the subassembly, reach the purpose that improves a brill section of thick bamboo stability.

In the circular cutting drilling tool, the stabilizing assembly comprises a stabilizing cylinder coaxially arranged at the front end of the guide positioning column and a stabilizing disc coaxially arranged on the stabilizing cylinder, the drill rod coaxially penetrates through the stabilizing cylinder and is axially positioned by the drill rod and the stabilizing cylinder through a second bearing, and the outer diameter of the stabilizing disc is smaller than the inner diameter of the drill cylinder; the drill bit is located at the front end of the stabilizing barrel, the outer diameter of the drill bit is smaller than that of the stabilizing barrel, the front end of the stabilizing barrel is provided with a guiding conical surface, and the minimum outer diameter of the guiding conical surface is smaller than that of the drill bit.

The outer diameter of the guide conical surface is gradually increased from front to back, and the maximum outer diameter of the guide conical surface is equal to the outer diameter of the stabilizing cylinder. Through the cooperation of the guide conical surface and the positioning hole, the stabilizing barrel can be firmly clamped, and the stabilizing barrel is prevented from jumping in the radial direction, so that the radial jumping of the drilling barrel is prevented, particularly the initial jumping of the drilling barrel when the drilling barrel is just contacted with a rock face is prevented, and the stability is further improved. Wherein, the external diameter of the stabilizing disc is slightly smaller than the internal diameter of the drill cylinder, and the stabilizing disc and the drill cylinder are in clearance fit. In order to prevent soil from entering the drill cylinder, an annular groove can be arranged on the periphery of the stabilizing disc, a sealing ring is arranged in the annular groove, and the sealing ring is in contact with the inner wall of the drill cylinder.

In the circular cutting drilling tool, the transmission assembly comprises a clutch disc coaxially sleeved on the drill rod, first meshing teeth arranged on one side of the clutch disc and second meshing teeth arranged at the rear end of the guide positioning column, and the first meshing teeth are meshed with the second meshing teeth.

The first meshing teeth extend along the radial direction of the clutch disc, the second meshing teeth extend along the radial direction of the guide positioning column, when the guide positioning column rotates, the clutch disc rotates through the second meshing teeth and the first meshing teeth, and the drill rod is driven to rotate synchronously when the clutch disc rotates. An independent power unit is not needed to drive the drill rod, so that the cost is greatly reduced.

In the annular cutting drilling tool, the drill rod is provided with a first external spline groove, the clutch disc is provided with a first internal spline, and the first internal spline is matched with the first external spline groove.

The first outer spline groove extends axially along the drill rod, and the first inner spline extends axially along the clutch disc. The clutch disc can move along the axial direction of the drill rod, and the clutch disc and the drill rod are circumferentially limited through the first outer spline groove and the first inner spline. When the drill rod is required to rotate, the clutch disc is close to the guide positioning column, so that the first meshing teeth are meshed with the second meshing teeth, and the guide positioning rod rotates to drive the drill rod to rotate synchronously. After the direction reference column is well fixed a position, the direction reference column is kept away from to the clutch disc, makes first meshing tooth and second meshing tooth part, can not drive the drilling rod when the direction reference column rotates and rotates, avoids the drill bit further to wearing and tearing the locating hole, has improved the stability of drilling rod to a certain extent to the stability of direction reference column has been improved.

In the circular cutting drilling tool, the rear end of the drilling barrel is coaxially and fixedly connected with a connecting barrel extending into the supporting barrel, a third bearing is arranged between the connecting barrel and the supporting barrel, and the linkage assembly is arranged between the connecting barrel and the guide positioning column. The third bearing can carry out axial and radial location to the connecting cylinder, guarantees that connecting cylinder and brill section of thick bamboo are coaxial with the supporting cylinder all the time, and when supporting cylinder axial motion, drives the connecting cylinder axial motion to drive brill section of thick bamboo axial motion.

In the annular cutting drilling tool, the linkage assembly comprises a second outer spline groove arranged on the guide positioning column and a second inner spline arranged on the connecting cylinder, and the second inner spline is matched with the second outer spline groove.

The second external spline groove extends along the axial direction of the guide positioning column, and the second internal spline extends along the axial direction of the connecting cylinder. The connecting cylinder can move along the circumferential direction of the guide positioning column, and the connecting cylinder and the guide positioning column are circumferentially limited through the second external spline groove and the second internal spline. When the guiding positioning column rotates, the connecting cylinder is driven to rotate through the second external spline groove and the second internal spline, so that the drilling cylinder is driven to rotate synchronously.

In the circular cutting drilling tool, the power assembly comprises a motor, a speed reducer in transmission connection with the motor and a driven gear in transmission connection with the speed reducer, and the driven gear is coaxially and fixedly connected with the guide positioning column. The input end of the speed reducer is connected with the output shaft of the motor, the output end of the speed reducer is an output gear, and the output gear is meshed with the driven gear. When the motor works, the speed reducer is driven to work, and after the speed is reduced by the speed reducer, the guide positioning column rotates at a low speed.

In above-mentioned circular cutting drilling tool, be equipped with the first guide rail parallel with the direction reference column on the drill jig, sliding fit has the headstock on the first guide rail, still be equipped with the first driving piece that is used for driving the headstock along first guide rail length direction motion on the drill jig, the direction reference column is worn to establish in the headstock and can follow power box and move together, driven gear and reduction gear are located in the headstock.

In order to realize the rotation of the guide positioning column, a bearing is arranged between the guide positioning column and the power box. The first driving part is a hydraulic cylinder or other linear driving mechanisms such as an electric push rod and drives the power box to move along the length direction of the first guide rail when the first driving part stretches out and draws back, so that the guide positioning column is driven to axially move.

In the circular cutting drilling tool, the drill frame is provided with a second guide rail parallel to the guide positioning column, the supporting cylinder is in sliding fit with the second guide rail, and the drill frame is further provided with a second driving piece for driving the supporting cylinder to axially move. The second driving part is a hydraulic cylinder or other linear driving mechanisms such as an electric push rod and the like, and when the second driving part stretches out and draws back, the supporting cylinder is driven to move along the length direction of the second guide rail, so that the drilling cylinder is driven to axially move.

Compared with the prior art, the annular cutting drilling tool has the following advantages: the guide positioning column is driven to rotate by the motor and the speed reducer, so that the transmission efficiency is high; the drill cylinder is in transmission connection with the guide positioning column through the linkage assembly, and the drill rod is in transmission connection with the guide positioning column through the transmission assembly, so that the number of power assemblies is reduced, and the cost is reduced; the drill cylinder can be effectively prevented from shaking through the stabilizing cylinder and the stabilizing disc, and the drill cylinder cannot deviate from the axial position by being matched with a stabilizing mechanism of the drill frame, so that the stable coaxial rotation of the drill cylinder is effectively ensured; under the matching of the guide conical surface and the positioning hole, the stabilizing cylinder and the guide positioning column can be firmly clamped, so that the guide positioning column is prevented from jumping in the radial direction, and the stability is further improved; after drilling, the stabilizing barrel can also support the core, so that the drilling barrel can conveniently withdraw from the circular seam.

Drawings

Fig. 1 is a cross-sectional view of a circular cutting tool provided by the present invention in a first step.

Fig. 2 is a schematic view of the assembly of the guiding and positioning column and the drill rod provided by the utility model.

Fig. 3 is a cross-sectional view of a circular cutting tool provided by the present invention in a second step.

Fig. 4 is a cross-sectional view of a ring cutting drill provided by the present invention at a third step.

Fig. 5 is a sectional view of the circular cutting tool provided by the present invention at a fourth step.

Fig. 6 is a sectional view of the circular cutting tool provided by the present invention at a fifth step.

Fig. 7 is a sectional view of the ring cutting drill provided by the present invention at the sixth step.

Fig. 8 is a sectional view of the ring cutting drill provided by the present invention at a seventh step.

Figure 9 is a cross-sectional view of a drill rod provided by the present invention.

Fig. 10 is a cross-sectional view of a circular cutting tool in accordance with another embodiment of the present invention.

In the figure, 1, a drill frame; 2. a support cylinder; 3. drilling a barrel; 4. guiding the positioning column; 5. a shaft hole; 6. a drill stem; 7. a drill bit; 8. a first bearing; 9. a stabilizing cylinder; 10. a stabilizing disc; 11. a second bearing; 12. a guiding conical surface; 13. a clutch plate; 14. a first meshing tooth; 15. a second meshing tooth; 16. a first outer spline groove; 17. a connecting cylinder; 18. a third bearing; 19. a second outer spline groove; 20. a motor; 21. a speed reducer; 22. a driven gear; 23. a power box; 24. a support ring; 25. water pores; a. a rock face; b. positioning holes; c. performing circular sewing; 26. and a third meshing tooth.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

The circular cutting drilling tool shown in fig. 1 comprises a drill frame 1, a support cylinder 2 which is arranged on the drill frame 1 and can move axially, and a drill cylinder 3 which is coaxially arranged with the support cylinder 2 and can move along with the support cylinder 2. In order to achieve an axial movement of the support cylinder 2, a second guide rail extending in the axial direction of the support cylinder 2 is provided on the drilling rig 1, the support cylinder 2 is in sliding fit with the second guide rail, and a second drive element for driving the support cylinder 2 to move axially is also provided on the drilling rig 1, the second guide rail and the second drive element not being shown in the figures. The second guide rail may be provided in plurality to support the support cylinder 2 from the side and the bottom. In this embodiment, the second driving member is a hydraulic cylinder or other linear driving mechanism such as an electric push rod, and when a piston rod of the second driving member extends and retracts, the supporting cylinder 2 is driven to move axially, so as to drive the drilling cylinder 3 to move axially.

In some other embodiments, a horizontal driving mechanism may be further provided to drive the support cylinder 2 to move axially, the structure of the horizontal driving mechanism is the same as that of the back-slagging horizontal girth drilling tool (application number CN202010288227.6) applied by the applicant at 14/4/2020, and the modified part of the present application is not included in the horizontal driving mechanism, so the structures of the drill rig 1 and the horizontal driving mechanism are not described in detail in the present application.

As shown in fig. 1, the outer diameter of the drill cylinder 3 is equal to the outer diameter of the support cylinder 2, the rear end of the drill cylinder 3 is coaxially and fixedly connected with a connecting cylinder 17 extending into the support cylinder 2, and two third bearings 18 are arranged between the connecting cylinder 17 and the support cylinder 2. The third bearing 18 can axially and radially position the connecting cylinder 17, and ensures that the connecting cylinder 17 and the drill cylinder 3 are always coaxial with the support cylinder 2. When the support cylinder 2 moves axially, the connecting cylinder 17 is driven to move axially, so that the drill cylinder 3 is driven to move axially.

As shown in fig. 1, a guiding positioning column 4 driven by a power assembly coaxially penetrates through the drill cylinder 3, the drill cylinder 3 is circumferentially limited and axially matched with the guiding positioning column 4 in a sliding manner through a linkage assembly, and the linkage assembly is arranged between a connecting cylinder 17 and the guiding positioning column 4. Under the action of the power assembly, the guide positioning column 4 rotates around the central axis of the guide positioning column, the drill barrel 3 is driven to synchronously rotate along with the guide positioning column 4 through the transmission action of the linkage assembly, the axial position of the drill barrel 3 is controlled, and the drill barrel 3 is drilled and retreated. The stabilizing component can effectively support the drilling barrel 3, prevents the drilling barrel 3 from shaking, and has good stability and no deviation from the axial position.

As shown in fig. 1, the linkage assembly includes a second external spline groove 19 formed on the guiding positioning column 4 and a second internal spline formed on the connecting cylinder 17, and the second internal spline is engaged with the second external spline groove 19. A second external spline groove 19 extends axially along the guide location post 4 and a second internal spline extends axially along the connector barrel 17. The connecting cylinder 17 can move along the circumferential direction of the guide positioning column 4, and the connecting cylinder and the guide positioning column are limited circumferentially through the second external spline groove 19 and the second internal spline. When the guiding positioning column 4 rotates, the connecting cylinder 17 is driven to rotate through the second external spline groove 19 and the second internal spline, so that the drilling cylinder 3 is driven to rotate synchronously.

As shown in fig. 1 and 2, a shaft hole 5 is formed in the guiding positioning column 4, a drill rod 6 coaxially penetrates through the shaft hole 5, the front end of the drill rod 6 penetrates out from the front end of the shaft hole 5, the rear end of the drill rod 6 penetrates out from the rear end of the shaft hole 5, a drill bit 7 is arranged at the front end of the drill rod 6, axial positioning is achieved between the drill rod 6 and the guiding positioning column 4 through at least two first bearings 8, and a transmission assembly used for enabling the drill rod 6 to rotate around the central axis of the transmission assembly is further arranged between the drill rod 6 and the guiding positioning column 4.

In order to prevent the drill rod 6 from shaking or bending, a plurality of support rings 24 are arranged between the guide positioning column 4 and the drill rod 6, and the support rings 24 are fixedly connected with the inner wall of the guide positioning column 4.

Before the drilling barrel 3 drills, the guide positioning column 4 moves forwards, meanwhile, the drill rod 6 is driven to move forwards, the rotation of the guide positioning column 4 is transmitted to the drill rod 6 through the transmission assembly, the drill rod 6 is driven to rotate, and the drill bit 7 drills a positioning hole b in the rock face a. The stabilizing component is located the front end of direction reference column 4, and drill bit 7 is located stabilizing component's front end, and when drill bit 7 bored, direction reference column 4 continued the antedisplacement, and until stabilizing component and locating hole b cooperation back, direction reference column 4 just stopped the antedisplacement. Through drilling out locating hole b on rock face a, can improve the stability of direction reference column 4, and then improve the stability of stabilizing the subassembly, reach the purpose that improves the stability of boring a section of thick bamboo 3.

As shown in fig. 9, the drill rod 6 has an axially extending water/gas hole 25 therein, the front end of the water/gas hole 25 is provided through the drill bit 7, and the rear end of the drill rod 6 is connected to a water/gas supply unit for supplying water and gas. The front end of the water air hole 25 is divided into a plurality of branches, and each branch penetrates out of the conical surface of the drill 7.

As shown in fig. 1 and 2, the transmission assembly includes a clutch disc 13 coaxially sleeved on the drill rod 6, a first engaging tooth 14 disposed on one side of the clutch disc 13, and a second engaging tooth 15 disposed at the rear end of the guiding and positioning column 4, wherein the first engaging tooth 14 is engaged with the second engaging tooth 15. The first meshing teeth 14 extend along the radial direction of the clutch disc 13, the second meshing teeth 15 extend along the radial direction of the guide positioning column 4, when the guide positioning column 4 rotates, the clutch disc 13 rotates through the second meshing teeth 15 and the first meshing teeth 14, and the clutch disc 13 drives the drill rod 6 to rotate synchronously when rotating. An independent power unit is not needed to drive the drill rod 6, so that the cost is greatly reduced.

As shown in fig. 2, a first external spline groove 16 is formed on the drill rod 6, and a first internal spline is formed on the clutch disc 13, and the first internal spline is matched with the first external spline groove 16. The first externally splined groove 16 extends axially along the drill rod 6 and the first internally splined groove extends axially along the clutch disc 13. The clutch disc 13 is axially movable along the drill rod 6, both being circumferentially limited by a first external spline groove 16 and a first internal spline. When the drill rod 6 is required to rotate, the clutch disc 13 is close to the guide positioning column 4, so that the first meshing teeth 14 are meshed with the second meshing teeth 15, and the guide positioning column rotates to drive the drill rod 6 to synchronously rotate. After the guiding positioning column 4 is positioned, the clutch disc 13 is far away from the guiding positioning column 4, so that the first meshing teeth 14 are separated from the second meshing teeth 15, the guiding positioning column 4 cannot drive the drill rod 6 to rotate when rotating, the drill bit 7 is prevented from further wearing the positioning hole b, the stability of the drill rod 6 is improved to a certain extent, and the stability of the guiding positioning column 4 is improved.

In this embodiment, a stabilizing assembly for preventing the drill barrel 3 from shaking is arranged at the front end of the guiding and positioning column 4. As shown in fig. 1 and 2, the stabilizing assembly comprises a stabilizing cylinder 9 coaxially arranged at the front end of the guiding and positioning column 4 and a stabilizing disc 10 coaxially arranged on the stabilizing cylinder 9, the drill rod 6 coaxially penetrates through the stabilizing cylinder 9 and is axially positioned by a second bearing 11, and the outer diameter of the stabilizing disc 10 is smaller than the inner diameter of the drill cylinder 3; the drill bit 7 is positioned at the front end of the stabilizing barrel 9, the outer diameter of the drill bit 7 is smaller than that of the stabilizing barrel 9, the front end of the stabilizing barrel 9 is provided with a guide conical surface 12, and the minimum outer diameter of the guide conical surface 12 is smaller than that of the drill bit 7.

The outer diameter of the guide conical surface 12 gradually increases from front to back, and the maximum outer diameter of the guide conical surface 12 is equal to the outer diameter of the stabilizing cylinder 9. Through the cooperation of the guide conical surface 12 and the positioning hole b, the stabilizing barrel 9 can be firmly clamped, and the stabilizing barrel 9 is prevented from jumping in the radial direction, so that the drill barrel 3 is prevented from jumping in the radial direction, particularly the initial jumping of the drill barrel 3 when just contacting with the rock face a is prevented, and the stability is further improved. Wherein, the outer diameter of the stabilizing disc 10 is slightly smaller than the inner diameter of the drill barrel 3, and the stabilizing disc and the drill barrel are in clearance fit. In order to prevent soil from entering the drill cylinder 3, an annular groove may be provided on the outer periphery of the stabilizer plate 10, and a seal ring may be provided in the annular groove, the seal ring contacting the inner wall of the drill cylinder 3. In order to facilitate slag discharge, a plurality of side holes are formed in the side wall of the drill barrel 3, and the side holes are spirally distributed along the length direction of the drill barrel 3.

As shown in fig. 1, the power assembly includes a motor 20, a speed reducer 21 in transmission connection with the motor 20, and a driven gear 22 in transmission connection with the speed reducer 21, and the driven gear 22 is coaxially and fixedly connected with the guiding positioning column 4. The input end of the speed reducer 21 is connected with the output shaft of the motor 20, and the output end of the speed reducer 21 is an output gear which is meshed with the driven gear 22. When the motor 20 works, the speed reducer 21 is driven to work, and after the speed is reduced by the speed reducer 21, the guide positioning column 4 rotates at a low speed.

The drill frame 1 is provided with a first guide rail parallel to the guide positioning column 4, the first guide rail is slidably matched with the power box 23, the drill frame 1 is further provided with a first driving part used for driving the power box 23 to move along the length direction of the first guide rail, the guide positioning column 4 penetrates through the power box 23 and can move along with the power box 23, and the driven gear 22 and the speed reducer 21 are arranged in the power box 23. The first guide rail and the first driver are not shown in the figures. The first guide rail may be provided in plural numbers, respectively at the side and the bottom of the power box 23. In order to rotate the guide positioning column 4, a bearing is arranged between the guide positioning column 4 and the power box 23. The first driving part is a hydraulic cylinder or other linear driving mechanisms such as an electric push rod, and when the first driving part stretches, the power box 23 is driven to move along the length direction of the first guide rail, so that the guide positioning column 4 is driven to move axially.

In this embodiment, the working process of the circular cutting drill is as follows:

in a first step, as shown in fig. 1, the drill frame 1 is abutted against the rock face a, the front end of the drill barrel 3 and the drill bit 7 are abutted against the rock face a, and the first meshing teeth 14 on the clutch disc 13 are not meshed with the second meshing teeth 15 on the guide positioning column 4.

In the second step, as shown in fig. 3, the clutch disc 13 is moved axially, so that the first engaging teeth 14 on the clutch disc 13 engage with the second engaging teeth 15 at the rear end of the guiding positioning post 4, and the motor 20 operates to transmit power to the driven gear 22 through the speed reducer 21, thereby driving the guiding positioning post 4 to rotate.

And thirdly, as shown in fig. 4, the first driving part acts to drive the power box 23 to move along the first guide rail, and simultaneously drive the guide positioning column 4 and the drill rod 6 to move forwards, and as the drill rod 6 is in a rotating state, a positioning hole b is drilled on the rock surface a when the drill rod advances.

Fourthly, as shown in fig. 5, when the guiding conical surface 12 is matched with the positioning hole b, the first driving part stops working, the first engaging teeth 14 on the clutch disc 13 are separated from the second engaging teeth 15 on the guiding positioning column 4, and the drill rod 6 stops rotating. At the moment, the drill rod 6 is radially positioned through the guide conical surface 12 and the stabilizing cylinder 9, the drill rod 6 radially positions the guide positioning column 4, the guide positioning column 4 radially positions the rear end of the drilling cylinder 3, and the stabilizing disc 10 radially positions the front end of the drilling cylinder 3.

And fifthly, as shown in fig. 6, the second driving part drives the supporting barrel 2 to move forward, so as to drive the drilling barrel 3 to move forward, and the guide positioning column 4 drives the drilling barrel 3 to rotate, so as to drill a circular seam c on the rock surface a.

And sixthly, as shown in fig. 7, the second driving element drives the supporting barrel 2 to move backwards, so that the drilling barrel 3 is withdrawn from the annular gap c. In the process of withdrawing the drill barrel 3, the stabilizing barrel 9 is always abutted against the rock core, so that the rock core is prevented from moving outwards along with the drill barrel 3.

Seventhly, as shown in fig. 8, the first driving member moves the power box 23 backward to drive the guiding and positioning column 4 to move backward, so that the stabilizing cylinder 9 and the drill 7 are separated from the positioning hole b.

And repeating the steps from one to seven to finish the drilling of the next circular seam c.

In some other embodiments, as shown in fig. 10, the transmission assembly comprises a clutch disc 13, a first engaging tooth 14 arranged on one side of the clutch disc 13, a second engaging tooth 15 arranged at the rear end of the guide positioning column 4, and a third engaging tooth 26 arranged at the rear end of the drill rod 6, wherein the first engaging tooth 14 is engaged with the second engaging tooth 15 and the third engaging tooth 26 simultaneously. The first toothing 14 extends radially along the clutch disk 13, the second toothing 15 extends radially along the guide post 4, and the third toothing 26 extends radially along the drill rod 6. When the guiding positioning column 4 rotates, the clutch disc 13 is rotated through the second meshing tooth 15 and the first meshing tooth 14, and when the clutch disc 13 rotates, the drill rod 6 is driven to synchronously rotate through the third meshing tooth 26 and the first meshing tooth 14.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The utility model provides a circular cutting drilling tool, includes drill jig (1), but locate on drill jig (1) and axial motion's a support section of thick bamboo (2) and with a support section of thick bamboo (2) coaxial setting and can be along with a drill section of thick bamboo (3) that support section of thick bamboo (2) the concerted movement, a serial communication port, coaxial guide reference post (4) driven by power component of wearing to be equipped with in the drill section of thick bamboo (3), drill section of thick bamboo (3) through linkage subassembly and guide reference post (4) spacing and axial sliding fit of circumference, be equipped with on guide reference post (4) and be used for preventing to bore the stabilizing assembly that a section of thick bamboo (3) rocked.

2. The circular cutting drilling tool as claimed in claim 1, wherein a shaft hole (5) is formed in the guide positioning column (4), a drill rod (6) coaxially penetrates through the shaft hole (5), a drill bit (7) is arranged at the front end of the drill rod (6), axial positioning is achieved between the drill rod (6) and the guide positioning column (4) through a first bearing (8), and a transmission assembly used for enabling the drill rod (6) to rotate around a central axis of the transmission assembly is further arranged between the drill rod (6) and the guide positioning column (4).

3. The circular cutting drilling tool as claimed in claim 2, characterized in that the stabilizing assembly comprises a stabilizing cylinder (9) coaxially arranged at the front end of the guiding and positioning column (4) and a stabilizing disc (10) coaxially arranged on the stabilizing cylinder (9), the drill rod (6) is coaxially arranged in the stabilizing cylinder (9) in a penetrating manner and axially positioned by a second bearing (11), and the outer diameter of the stabilizing disc (10) is smaller than the inner diameter of the drill cylinder (3); the drill bit (7) is located at the front end of the stabilizing barrel (9), the outer diameter of the drill bit (7) is smaller than that of the stabilizing barrel (9), the front end of the stabilizing barrel (9) is provided with a guide conical surface (12), and the minimum outer diameter of the guide conical surface (12) is smaller than that of the drill bit (7).

4. The annular cutting drilling tool as claimed in claim 2, wherein the transmission assembly comprises a clutch disc (13) coaxially sleeved on the drill rod (6), a first meshing tooth (14) arranged on one side of the clutch disc (13) and a second meshing tooth (15) arranged at the rear end of the guide positioning column (4), and the first meshing tooth (14) is meshed with the second meshing tooth (15).

5. An annular cutting drill according to claim 4, characterized in that the drill rod (6) is provided with a first externally splined groove (16), and the clutch disc (13) is provided with a first internally splined groove, which is engaged with the first externally splined groove (16).

6. The circular cutting drilling tool as claimed in claim 1, characterized in that the rear end of the drill cylinder (3) is coaxially fixedly connected with a connecting cylinder (17) extending into the support cylinder (2), a third bearing (18) is arranged between the connecting cylinder (17) and the support cylinder (2), and the linkage assembly is arranged between the connecting cylinder (17) and the guide positioning column (4).

7. An annular cutting drill according to claim 6, characterized in that the linkage assembly comprises a second external spline groove (19) provided on the pilot post (4) and a second internal spline provided on the connector barrel (17), the second internal spline being engaged with the second external spline groove (19).

8. The circular cutting drill according to claim 1, characterized in that the power assembly comprises a motor (20), a speed reducer (21) in transmission connection with the motor (20), and a driven gear (22) in transmission connection with the speed reducer (21), wherein the driven gear (22) is coaxially fixedly connected with the guide positioning column (4).

9. The circular cutting drilling tool as claimed in claim 8, wherein a first guide rail parallel to the guiding and positioning column (4) is arranged on the drill frame (1), a power box (23) is slidably fitted on the first guide rail, a first driving member for driving the power box (23) to move along the length direction of the first guide rail is further arranged on the drill frame (1), the guiding and positioning column (4) is arranged in the power box (23) in a penetrating manner and can move along with the power box (23), and the driven gear (22) and the speed reducer (21) are arranged in the power box (23).

10. The circular cutting drilling tool as claimed in claim 1, characterized in that a second guide rail parallel to the guiding and positioning column (4) is arranged on the drilling rig (1), the supporting cylinder (2) is in sliding fit with the second guide rail, and a second driving member for driving the supporting cylinder (2) to move axially is further arranged on the drilling rig (1).