KR101566374B1

KR101566374B1 - Direct-boring excavator bit

Info

Publication number: KR101566374B1
Application number: KR1020150071654A
Authority: KR
Inventors: 임사인
Original assignee: 임사인
Priority date: 2015-05-22
Filing date: 2015-05-22
Publication date: 2015-11-06

Abstract

The present invention relates to a direct-boring drilling bit. The purpose of the present invention is to provide the direct-boring drilling bit preventing damage and a malfunction of equipment and significantly reducing an overall construction period. To achieve the purpose, the direct-boring drilling bit of the present invention comprises: a ring-shaped boring bit (100); a casing connector (200) rotationally coupled to an upper portion of the ring-shaped boring bit (100); and a recovery bit (300) having a coupling protrusion coupling groove (314). The boring bit (100) enables a coupling protrusion (120) to protrude to be elongated in a vertical direction, and the recovery bit enables the coupling protrusion coupling groove (314) to be vertically elongated on one side surface of a slime discharge groove (313) of a bit head unit (310). The coupling protrusion coupling groove (314) of the recovery bit (300) is easily coupled to the coupling protrusion (120) of the ring-shaped boring bit (100).

Description

Direct-boring excavator bit

The present invention relates to a straight drilling bit, and more particularly, it is very simple and quick to combine and separate the number of bits constituting a straight drilling bit into a round bit, Even if large turning force and hammer ring are applied, there is no fear of damage or breakdown of equipment,

Drilling operation for excavating the ground without replacing equipment and hammer ring for crushing the rock can be performed at the same time by using one equipment. Therefore, equipment purchase cost is drastically reduced and, among other things, And a drill bit can be greatly reduced.

Generally, concrete structures such as bridges and buildings are constructed, or casings are drilled with rock drills to prevent the collapse of the rocks due to subsidence during civil works, and then the casing is installed.

The excavating bit used to excavate such a ground or rock (all-steel layer) is a hitting means used for piercing the ground such as for mine use, earth anchor use, geological use, groundwater development, etc., Hamming and drilling by rotary motion are simultaneously performed in the reciprocating motion in the axial direction transmitted from the hammer to puncture the ground or the rock.

However, since the conventional excavation bit is formed integrally with the bit body formed with the excavation tip protruding on the bottom surface, it is not possible to replace only the excavation tip where abrasion and hit defects easily occur. As a result, Even a reusable bit body is discarded before its life, resulting in a significant economic loss.

In order to solve the problem of the integrated excavation bit, the bit head and the bit body are separated from each other so that only the bit head can be replaced without requiring replacement of all the components in the case where the severity of the excavation tip is severe. .

An example of such an excavation bit is disclosed in Japanese Patent Application Laid-Open No. 10-2015-14276, which is a construction in which a digging tip 11 for excavating a ground surface is protruded from a bottom surface, as shown in FIGS. 1 to 3, A bulb bit 10 protruding from the inner surface of the bulb 12 so as to be horizontally thin and having a predetermined height;

A casing connection port 20 rotatably coupled to the upper portion of the annular boss bit 10 and connected to the upper casing 1;

A fastening protrusion fastening groove 32a is formed at a predetermined height of one side of the slurry discharge groove 32 so as to be inserted into the casing fastening hole 20 and fastened to the annular boss 10, 12, a bit head portion 30a formed horizontally and formed with a drilling tip 31 protruded for excavating the ground surface on the bottom surface, and a bit head portion 30b extending upwardly of the bit head portion 30a to receive power from the outside And a recovery bit 30 having a power transmitting member 30b formed therein.

2, in order to perform a drilling and a hamming operation by fastening a number of bits to the annular boss bit, the bit 30 is inserted into the inner casing 1 or the casing 1 2 through the slime discharge grooves 32 until the slime discharge grooves 32 are aligned with the fastening protrusions 12 of the annular arbor bit 10 so that the fastening protrusions 12 The fastening protrusions 12 are horizontally long and flat on the top surface,

Since the lower end surface 33a of the connecting portion 33 between the slime discharge groove 32 and the slime discharge groove 32 is also horizontally long and flat and has a large contact area, It is not easy to fit in the fastening protrusion of the base 10.

In addition, since the return bit 30 and the annular boss bit 10 are not visible at all from the outside, and because the boss 10 is rotatably coupled to the lower end of the casing coupling 20 without movement, If the lower end face 33a of the flat connecting part 33 and the upper end face of the horizontally flattening fastening protrusion 12 are in contact with each other and the bit 30 is rotated, even if there is an excavation tip, It is not easy to insert the slime discharge groove 32 into the fastening protrusion 12 of the annular arbor bit 10 because the resisting force is generated and the capping bead 10 rotates at the same time.

After the slime discharge groove 32 is aligned with the fastening protrusion 12 of the annular arbor bit 10, the withdrawing bit 30 is further lowered so that the fastening protrusion 12 engages with the fastening protrusion fastening groove 32a. The fastening protrusions 12 must be engaged with the fastening protrusion fastening recesses 32a so that the fastening protrusions 12 are fastened to the fastening protrusion fastening recesses 32a The operation of inserting the slime discharge groove 32 into the fastening protrusion 12 of the annular arbor bit 10 is easy because the winding bit 10 rotates simultaneously when the return bit 30 is rotated I did.

On the other hand, if the drilling operation is completed or the drilling tip formed on the bottom of the recovering bit 30 is worn out and the service life of the recovering bit 30 is completed, the recovering bit 30 should be separated from the capping bit 10 to do,

At this time, since the fastening protrusion 12 is coupled to the horizontally formed fastening protrusion fastening groove 32a, it is not necessary to immediately raise the recovering bit 30, but the operator may rotate the recovering bit 30 in the direction opposite to the excavation direction It is necessary to remove the fastening protrusion 12 from the fastening protrusion fastening groove 32a by lifting up the fastening protrusion 12 and completely remove the fastening protrusion 12 from the slime releasing recess 32 Should be performed.

However, if the recovering bit 30 is rotated in the process of separating, since the capping bit 10 can rotate itself, it rotates simultaneously in the rotating direction of the recovering bit 30, so that the recovering bit 30 is not easily separated There were a lot of situations in which we were in a difficult situation.

Particularly, when the slurry discharge groove 32 has a small amount of a hard crushed product, there is a serious problem that the fastening protrusion 12 is not pulled out even if the return bit 30 is rotated.

As described above, in the conventional excavation bit, it is very inconvenient to perform the operation of separating and combining the recovery bit 30 with the rectangular bit 10, and it takes much time or the separation operation is not performed in time, There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in order to solve all of the above problems, and it is an object of the present invention to provide an apparatus and a method for connecting and disconnecting a number of bits constituting a drilling bit to a long bit, Even if large turning force and hammer ring are applied, there is no fear of damage or breakdown of equipment,

Drilling operation for excavating the ground without replacing equipment and hammer ring for crushing the rock can be performed at the same time by using one equipment. Therefore, equipment purchase cost is drastically reduced and, among other things, And a drastic reduction in the period of time required for the drilling of the drilling bit.

According to an aspect of the present invention, there is provided a drill bit for drilling a ground surface on a bottom surface of the drill bit, the drill bit having a fastening protrusion protruding from the inner surface thereof, An annular boss bit formed therein;

A casing connection port rotatably coupled to the upper portion of the annular boss bit and connected to the upper casing;

A bit head part formed with a fastening protrusion fastening groove for fastening the fastening protrusion to one side of the slime discharge slot so as to be inserted into the casing connector and fastened to the annular boss bit, and a drilling tip protruding from the bottom face, And a power transmitting member extending in an upper direction of the bit head to receive power from the bit head unit,

And the upper end of the fastening protrusion is formed into a convex arcuate shape upward,

And the slit discharge groove of the bit head is provided with a fastening protrusion fastening groove for fastening the fastening protrusion formed so as to be perpendicularly protruded vertically to the inner surface of the annular bushing bit, The lower end surface of the connecting portion between the upper and lower ends of the connecting portion is formed into an arcuate shape convex downward,

Shaped lower end surface of the connection portion slides from the arcuate upper surface convex upward to the upper side of the fastening protrusion when the return bit is to be fastened to the annular recessed bit so that the fastening protrusion of the annular single- So that the fastening projections can be easily fastened.

According to the present invention, in the case of the annular bore bit, the fastening protrusion formed on the inner surface is protruded in the vertical direction. In case of the recovered bit, the lower side of the slit discharge groove of the bit head is opened vertically so that the fastening protrusion fastening groove Therefore, when it is desired to fasten the number of bits to the annular arbor bit, it is possible to achieve an advantage that the fastening projection of the number of bits can be very easily and quickly and accurately performed on the fastening protrusion of the annular arbor bit.

Particularly, the upper end of the fastening protrusion of the annular boss bit is formed in an arcuate shape convex upward, and the lower end face of the connecting part between the fastening protrusion fastening groove of the bit head and the slime discharge groove is formed into a convex arcuate shape downward Therefore, even if the convex arcuate lower end surface of the lower portion of the connecting portion comes into contact with the convex arcuate upper surface of the fastening protrusion when the recovering bit is to be fastened to the annular arbor bit, the bottom surface of the connecting portion smoothly slides downward, The advantage that the fastening protrusion fastening groove of the retracting bit is provided in the fastening protrusion of the bit is much simpler, quicker and more accurate than any type of conventional excavating bit.

At this time, if the drilling tip is formed on the bottom surface of the connection portion between the fastening protrusion fastening recess and the slime discharge recess, the fastening protrusion can be further easily fastened to the fastening protrusion of the annular boss bit, Since the excavation tip can be further formed, the advantage of being able to excavate the ground or the rock more effectively without wearing the fastening protrusion can be exhibited at the same time.

In the meantime, since the fastening protrusion is vertically elongated in the present invention, it is possible to rotate the recovering bit with a strong force, It is possible to hammer the recovered bits with a strong force, which is advantageous in that the excavation efficiency can be greatly increased.

Further, according to the present invention, it is possible to fasten the annular boss bit by using a "C" type metal ring having high durability and strength when the annular boss bit is rotatably fastened to the casing connection port. Since there is no worry of losing, the advantage of being able to carry out work reliably is exercised.

However, in the present invention, when the drilling operation is completed or the drilling tip formed on the bottom of the recovered bit is worn out and the lifetime is exhausted, the operator can increase the recovered bit from the protruded fastening groove of the recovered bit, The recovered bits can be separated very easily and quickly so that the recovered bits are rotated in the direction opposite to the position where the fastening protrusion fastening recesses of the recovered bits are formed and the fastening protrusions are released by the fastening protrusion fastening recesses It is unnecessary to carry out troublesome work to be performed, and in the conventional case, if the number of bits is rotated, the number of bits can be rotated by itself, so that the number of bits can not be easily separated There is no worry of being hit.

Therefore, the drilling bit of the present invention is very simple, fast, accurate, and reliable, even when relatively large rotational force and hammer ring are applied, There is no need to worry about the damage of the ground, and the drilling operation for excavating the ground without using the equipment and the hammer ring for crushing the rock can be carried out at the same time. Therefore, And the total construction period can be greatly shortened by increasing the number of windings.

Figs. 1 to 3 are diagrams showing the configuration of a conventional excavation bit,
1 is an exploded perspective view.
Fig. 2 is an installation view.
FIG. 3 is an enlarged view of a main part showing a state in which a recovering bit is fastened to a lead bit. FIG.
4 to 7 are views showing the construction of the perforated drill bit according to the present invention,
4 is an exploded perspective view.
5 is an enlarged view of a main part showing a state in which a recovering bit is fastened to a leftmost bit.
6 is a perspective view of the assembled state.
7 is an assembled state bottom view.
8 is an exploded perspective view showing another configuration of perforation drilling bits according to the present invention.
FIG. 9 is a view showing a state where a rod is screwed onto the upper end surface of the bit head of the recovered bit as the present invention. FIG.
10 is a state in which the recovery bit is fastened to the casing connecting port by using a "C" type metal ring as the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the embodiments described below are provided for illustrative purposes only, and that the present invention may be embodied with various modifications and alterations. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention. In addition, the attached drawings are not drawn to scale in order to facilitate understanding of the invention, but the dimensions of some of the components may be exaggerated.

As shown in FIGS. 4 to 7, the basic structure of the present invention includes an annular boss bit 100 protruding from a drilling tip 110 for excavating a surface on a bottom surface thereof;

A casing connection port 200 rotatably coupled to the upper portion of the annular boss bit 100 and connected to the upper casing 250;

A bit head part 310 inserted into the casing coupling part 200 and connected to the annular boss bit 100 and formed with a drilling tip 311 protruding from the bottom surface for excavating the ground surface, And a recovery bit (300) having a power transmitting member (320) extending upward in the bit head part (310).

However, when the annular bobbin 100 is closely examined, a fastening protrusion 120 for coupling with the return bit 300 is formed on the inner surface of the fastening protrusion 120. Unlike the conventional fastening protrusion 120, But also the upper end surface 120a of the fastening protrusion 120 is formed in an arcuate shape convex upward.

A key insertion groove 130 is formed on the inner side of the upper side of the fastening protrusion 120. A key hole 131 penetrating the key insertion groove 130 is further formed,

A key insertion slot 130 having a key hole 131 at a lower end of a casing coupling hole 200 formed in the lower outer edge of the casing insertion hole 200 is coupled with an annular boss bit 100 formed in the inner casing, When the resilient key 132 is inserted through the through hole 131, the annular arbor bit 100 can be coupled so as not to fall out, and the annular arbor 100 can be coupled to be rotatable.

In the case of the recovered bits 300, slime discharge grooves 313 are formed in the longitudinal direction of the bit head part 310 in order to discharge the sand having been crushed by the cutting tips 110 and 311 The slit discharge groove 313 is formed at one side thereof with a fastening protrusion coupling groove 314 for fastening the fastening protrusion 120 protruding vertically and vertically on the inner surface of the annular bore bit 100, Of course,

And the lower end surface 315a of the connecting portion 315 between the fastening projection engaging groove 314 and the slime discharge groove 313 is formed into a convex downward convex shape.

The lower end surface 315a of the connection portion 315 is formed in a convex downward convex shape when the withdrawal bit 300 is to be fastened to the annular arbor 100,

Since the upper end surface 120a of the fastening protrusion 120 formed to be vertically long on the inner surface of the cap bite 100 is also formed in a convex arcuate shape upwardly, the fastening protrusion 120 of the annular bore bit 100 300 can be very simply, quickly, and accurately fastened.

The lower surface 315a of the connecting portion 315 formed in a convex arc shape having a downward bottom is connected to the lower end surface 315a of the connecting portion 315 between the connecting protrusion connecting groove 314 and the slime discharging groove 313, And is slid smoothly from the upper surface of the fastening protrusion 120 having a convex arcuate shape upward on the fastening protrusion 120 by the excavating tip 316 formed on the bottom surface of the connecting portion 315, The fastening protrusion fastening groove 314 of the return bit 300 can be easily and quickly and precisely fastened to the fastening protrusion 120 of the annular bobbin 100.

8, the power transmission member 320 may be screwed to the upper end surface of the bit head 310, and as shown in FIG. 9, a separate rod may be screwed .

10, a "C" -shaped metal ring 132a is provided in the key insertion groove 210 formed at the lower end of the lower end of the casing connector 200,

An inclined surface 130a is formed at the upper end of the key insertion groove 130 of the annular bobbin 100,

Shaped metal ring 132a is elastically collapsed on the inclined surface 130a when the casing connecting hole 200 is coupled to the annular arbor 100. When the coupling is completed, So that the annular bobbin 100 can be coupled to be rotatable.

The use state of the perforated drill bit according to the present invention will be described.

The hollow casing 250 is fixedly coupled to the upper end of the casing connecting port 200 having the hollow cylindrical shape through a conventional coupling method such as welding.

The upper end of the annular boss bit 100 having the key insertion groove 130 formed at the lower end of the casing coupling hole 200 formed with the outer key has an elasticity Key 132 is inserted.

The flexible resilient keys 132 inserted through the key holes 131 are inserted into the key insertion recesses 130 and 210 so that the annular recessed bits 100 are firmly coupled from the casing connection recesses 200, The annular bobble bit 100 smoothly rotates itself from the non-rotating casing connection hole 315. [0156]

However, since the flexible resilient key 132 is weak in durability, abrasion occurs during use and there is a risk that the annular boss 100 may be detached from the casing connector 200 when the hammer ring operation is performed.

10, a "C" -shaped metal ring 132a is provided in the key insertion groove 210 formed in the outer edge of the lower end of the casing connection port 200,

A C-shaped metal ring 132a is formed at an upper end of the key insertion groove 130 of the annular bobbin 100 so that when the casing coupling hole 200 is coupled to the annular boss bit 100, And when the coupling is completed, the annular bobbin bit 100 is engaged again so that the annular bobbin bit 100 does not come off, and at the same time, the annular bobbin bit 100 can rotate itself.

In this manner, since the "C" -shaped metal ring 132a has high durability and strength, there is no fear that the annular boss 100 will be detached from the casing connector 200 even when the hamming operation is performed.

Then, after the annular bobbin bit 100 is placed in the perforation hole of the ground, the recovering bit 300 coupled with the power transmitting rod 330 is fully inserted into the casing 250 to the power transmitting member 320 .

The bit head 310 of the recovery bit 300 reaches the inside of the rear end of the cap bit 100 through the casing connection port 315,

At this time, in the present invention, the slit discharge groove 313 is formed in the longitudinal direction on the outer surface of the bit head part 310 in the case of the recovery bit 300. At one side of the slurry discharge groove 313, Since the fastening protrusion coupling groove 314 for fastening the fastening protrusion 120 protruding vertically and vertically is formed vertically on the inner surface of the capping bead 100 so as to open downward, Even when the lower end face 315a of the connection part 315 of the recovery bit 300 comes into contact with the upper end face 120a of the fastening protrusion 120 of the annular arbor bit 100, the lower end face 315a of the connection part 315 smoothly slides The fastening protrusion 120 of the annular bobbin 100 is fastened to the fastening protrusion fastening groove 314 of the recovering bit 300 very simply and quickly and accurately.

Particularly, the lower end surface 315a of the connection portion 315 between the fastening protrusion fastening groove 314 and the slime discharge recess 313 of the recovery bit 300 is formed into a convex downward convex shape, The lower end surface 315a of the connection portion 315 of the recovery bit 300 may be formed without an frictional resistance when the upper end surface 120a of the fastening protrusion 120, The lower end face 315a of the connecting portion 315 is naturally more easily slid downward while sliding without friction resistance even when the upper end face 120a of the fastening protrusion 120 of the annular arbor bit 100 is brought into contact with the upper end face 120a.

In this way, the direct drilling bit of the present invention is much simpler and quicker and more accurate than any conventional drilling bit for fastening the recovering bit 300 to the whipping bit 100.

When the drilling tip 316 is formed on the lower end surface 315a of the connecting portion 315 between the fastening protrusion coupling groove 314 and the slime discharge groove 313, It is possible to easily slip from the upper end surface 120a of the fastening protrusion 120 having a convex arcuate shape upward to the upper side of the fastening protrusion 120 so that the fastening protrusion 120 of the annular bobbin bit 100 can be more easily 300 of the first embodiment.

In the state where the fastening protrusion fastening groove 314 of the return bit 300 is fastened to the fastening protrusion 120 of the annular arbor bit 100 as described above, When the return bit 300 is rotated while supplying air or cutting water through the spray hole 312 and hemming is performed, the excavation of the ground proceeds while simultaneously rotating the cap bit 100.

Then, the ground and the rock are crushed and the finely crushed slime is discharged to the outside through the slime discharge grooves 313.

In addition, since the fastening protrusions 120 are vertically long, the force of the fastening protrusions 120 is strong even when a large force is transmitted horizontally from the side of the rotation, Even when the hammer ring is vertically transmitted, since the resisting force is strong, the drill bit 300 can be hammered by the strong force, which can greatly increase the drilling efficiency.

Since the excavating tip 121 can be further formed on the bottom surface of the coupling protrusion 120, the ground or the rock can be excavated more effectively without wearing the coupling protrusion 120.

When the excavation work is completed or the excavation tip 311 formed on the bottom surface of the recovering bit 300 is worn out and the service life is reached, the recovering bit 300 may be separated from the excavating bit 100.

At this time, if the operator repeatedly raises the recovering bit 300, the fastening protrusion 120 of the capping bit 100 is naturally released from the fastening protrusion fastening groove 314 of the recovering bit 300, Is very simple and quick.

Therefore, the retraction bit 300 is rotated in a direction opposite to the position where the fastening protrusion fastening recess 314 of the retraction bit 300 is formed and the fastening protrusion 120 is released by the fastening protrusion fastening recess 314 In the conventional case, if the recovered bit 300 is rotated, the capped bit 100 can rotate itself. Therefore, since the recovered bit 300 is simultaneously rotated in the rotational direction of the recovered bit 300, There is no fear that the user may be in a difficult situation in which separation of the battery 300 is difficult.

In addition, even if a comparatively hard crushed material is caught in the slime discharge groove, the recovered bits can be easily taken out without being interfered with at all.

As can be seen from the above, the use of the drilling bit of the present invention enables the operation of coupling and separating the recovered bits 300 to and from the long bits 100, which is very simple and accurate, Even if large turning force and hammer ring are applied, there is no fear of damage or breakdown of equipment.

In addition, it is possible to simultaneously perform various operations such as drilling for ground excavation and hammer ring for crushing rock by using one equipment, so that equipment purchase cost is greatly reduced and, among other things, The total construction period can be greatly reduced.

As described above, the present invention has been described by reference to the preferred embodiments and drawings, but it should be understood that the present invention is not limited to these embodiments, and various changes and modifications may be made without departing from the spirit and scope of the present invention by those skilled in the art. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the appended claims.

100: Presidential bit 110, 121, 311, 316: Excavation tip
120: fastening protrusion 120a: upper surface
130, 210: key insertion groove 200: casing connection port
250,250 ': casing 300: recovery bit
310: bit head part 312: fluid ejection hole
313: slime discharge groove 314: fastening protrusion fastening groove
315: connection portion 315a: bottom surface
320: Power transmission member 330: Power transmission rod

Claims

delete

An annular boss bit 100 formed with a drilling tip 110 for drilling a ground surface on the bottom surface and a fastening protrusion 120 protruding from the inner surface and a key insertion groove 130 formed on the inner side of the fastening protrusion 120, Wow;
A casing connection port 200 rotatably coupled to the upper portion of the annular boss bit 100 and connected to the upper casing 250;
A coupling protrusion coupling groove 314 is formed in one side of the slime discharge groove 313 so as to be inserted into the casing coupling hole 200 and to be coupled to the annular boss bit 100, And a power transmitting member 320 extending upward from the bit head unit 310 for receiving power from the outside. The power transmitting member 320 is provided with an excitation tip 311 for excavating the bit head unit 310, In constructing the perforated excavation bit comprising the recovered bits 300,
The upper surface 120a of the fastening protrusion 120 is formed in an arcuate shape which is convex upward,
The lower end surface 315a of the connecting portion 315 between the fastening protrusion fastening groove 314 and the slime discharge groove 313 is formed to be convex downward Shaped,
Shaped lower end surface 315a protruding downward from the connecting portion 315 when the withdrawal bit 300 is to be fastened to the annular arbor 100. The arcuate upper end surface 120a Wherein the fastening protrusion fastening groove (314) of the recovering bit (300) is easily fastened to the fastening protrusion (120) of the annular arbor bit (100) while being slidably displaced from the fastening protrusion (300).

3. The method of claim 2,
An excavating tip 316 is formed on the lower end surface 315a of the connecting portion 315 and the excavating tip 316 formed on the lower end surface 315a of the connecting portion 315 forms an upper end surface 120a of the fastening protrusion 120 Wherein the fastening protrusion coupling groove (314) of the return bit (300) is easily fastened to the fastening protrusion (120) of the annular arbor bit (100) while being slidably displaced from the fastening protrusion (300).

delete