KR20090054192A - Hammer bit for digging - Google Patents

Hammer bit for digging Download PDF

Info

Publication number
KR20090054192A
KR20090054192A KR1020070120929A KR20070120929A KR20090054192A KR 20090054192 A KR20090054192 A KR 20090054192A KR 1020070120929 A KR1020070120929 A KR 1020070120929A KR 20070120929 A KR20070120929 A KR 20070120929A KR 20090054192 A KR20090054192 A KR 20090054192A
Authority
KR
South Korea
Prior art keywords
bit
hammer
groove
pilot
pilot bit
Prior art date
Application number
KR1020070120929A
Other languages
Korean (ko)
Inventor
임사인
Original Assignee
임사인
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 임사인 filed Critical 임사인
Priority to KR1020070120929A priority Critical patent/KR20090054192A/en
Publication of KR20090054192A publication Critical patent/KR20090054192A/en

Links

Images

Classifications

    • 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
    • E21B10/36—Percussion drill bits
    • 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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

The present invention relates to a drill hammer bit that improves the fastening structure between the pilot bit and the outer bit constituting the drill hammer bit used for drilling the ground or rock (stone layer) directly; On the front end is provided with a plurality of first cutting tips, the rear end of the pilot bit is supported by the hammer, and the front end of the pilot bit is formed of an outer bit which is provided with a plurality of second cutting tips in the front end The pilot bit may include a plurality of first guide grooves having the same shape in the front and rear direction on an outer circumferential surface of the body, and a second guide groove crossing the first guide grooves is formed along the outer circumferential surface of the body. When the first and second guide grooves are formed with a locking groove at one side of the intersection portion, a stopper portion is formed at the rear end of the second guide groove, and the outer bit is guided to the first guide groove to be supported by the stopper portion. It characterized in that the locking projection is formed to be engaged to the locking groove when rotating to one side.

According to the present invention, by improving the fastening structure of the pilot bit and the outer bit constituting the drilling hammer bit, when the outer bit is fastened to the front of the pilot bit, the operator does not need to adjust the position there is an advantage that the fastening operation is easy .

Perforated, hammer, beat

Description

Hammer Bit for Digging

The present invention relates to a drill hammer bit, and more particularly, to a drill hammer bit that improves the fastening structure of the pilot bit and the outer bit constituting the drill hammer bit used for direct drilling of the ground or rock (stone layer) It is about.

In general, to construct a concrete structure such as a bridge or a building, or to prevent the collapse of the construction due to the ground subsidence during civil engineering, the casing is installed after drilling the ground or rock (stone layer) directly with an excavation device.

Excavation equipment used to dig such ground or rock (stone layer) is provided with a drill hammer bit 1 as shown in Figs. 1 to 3 at one end of the hammer.

At this time, the drilling hammer bit (1) is rotated with the hammer that rotates by the hydraulic or pneumatic inflow from the outside.

At this time, the drilling hammer bit (1) is formed with a plurality of cutting pins 12, the rear end of the pilot bit 10 is fastened to the hammer, and the end of the pilot bit 10 is fastened to the ground or rock Outer bit 20 that rotates together when the pilot bit 10 is directly drilled (rotational layer) and the core or rock (hole layer) is directly drilled and separated from the pilot bit 10 after the completion of the drilling. Is made of.

More specifically, the pilot bit 10 is provided with a rod 14 at the rear end thereof, coupled to the hammer, and formed through the air passage 10a through which the compressed air moves, and at the front end thereof, the air passage 10a. The air discharge hole (10b) and a plurality of cutting tips 12 are communicated with.

In addition, the pilot bit 10 maintains a 120 ° interval on the outer circumferential surface thereof, and a guide groove 11 is formed in the front and rear directions, and a locking groove 13 is formed at one side of the guide groove 11.

On the other hand, the outer bit 20 is made of a cylindrical shape is provided with a plurality of cutting tips 22 at its front end, the inner circumferential surface is guided to the guide groove 11 is fastened to the locking groove 13 The number of devices 24 is provided to correspond to the guide groove (11).

Accordingly, in order to fasten the outer bit 20 to the front of the pilot bit 10, the engaging protrusion 24 of the outer bit 20 is aligned with the guide groove 11 of the pilot bit 10. After moving to the rear of the pilot bit 10 is guided along the guide groove 11 while rotating the outer bit 20 in one direction in the centrifugal direction at an appropriate position when the locking projection 24 is fastened to the locking groove (13) do.

In such a state, when directly drilling the ground or rock (stone layer) or the like, when the pilot bit 10 is rotated in the opposite direction, the outer bit 20 is integrally rotated and drilled, and the pilot is completed after the drilling is completed. When the bit 10 is rotated in the forward direction, the outer bit 20 is separated from the pilot bit 10 and remains in the direct drilling portion of the ground or rock (stone layer).

By the way, the engaging protrusion 24 of the outer bit 20 is made of a substantially (-) shape, the guide groove 11 of the pilot bit 10 is also formed of a (-).

Accordingly, in order to fasten the outer bit 20 to the pilot bit 10, the locking protrusion 24 of the outer bit 20 is matched with the guide groove 11 of the pilot bit 10 and then moved backward. It is not possible to check the section to be caught with the naked eye (肉眼), so as to advance the outer bit 20 along the guide groove 11 to find the locking groove 13 to which the locking projection 24 is engaged, so the outer bit 20 Had a disadvantage of not being easy to fasten.

Therefore, it is not easy for the operator to fasten the outer bit 20 made of steel to the pilot bit 10, and workability also has a disadvantage.

Accordingly, to solve these problems, an object of the present invention is to improve the fastening structure of the pilot bit and the outer bit used to drill the ground or rock (stone layer) for easy drilling and drilling work excellent for workability To provide a bit.

The present invention for achieving the above object;

On the front end is provided with a plurality of first cutting tips, the rear end of the pilot bit is supported by the hammer, and the front end of the pilot bit is formed of an outer bit which is provided with a plurality of second cutting tips in the front end In;

The pilot bit has a plurality of first guide grooves having the same shape in the front-rear direction on the outer circumferential surface of the body, and a second guide groove crossing the first guide groove is formed along the outer circumferential surface of the body, A locking groove is formed at one side of the first guide portion and the second guide groove, and a stopper portion is formed at a rear end of the second guide groove;

When the outer bit is guided to the first guide groove and supported by the stopper part, the outer bit provides a bit for the drilling hammer, wherein a locking protrusion is formed to be engaged with the locking groove when rotated to one side.

According to the present invention, by improving the fastening structure of the pilot bit and the outer bit constituting the drilling hammer bit, when the outer bit is fastened to the front of the pilot bit, the operator does not need to adjust the position there is an advantage that the fastening operation is easy .

With reference to the accompanying drawings, the drilling hammer bit according to the present invention will be understood by the embodiments described in detail below.

At this time, Figure 4 is an exploded perspective view showing a drill hammer bit according to the invention, Figure 5 is a combined perspective view showing a drill hammer bit according to Figure 4, Figure 6 is a drill hammer bit according to Figure 4 7 is a view illustrating a coupling structure, and FIG. 7 illustrates another embodiment of the drilling hammer bit according to the present invention, and FIG. 8 illustrates another embodiment of the drilling hammer bit according to the present invention. One drawing.

First, according to FIGS. 4 to 6, the drilling hammer bit 100 according to the present invention has a first cutting tip 114 formed of a plurality of cemented carbides protrudingly formed at the front end of the body 112, and the rear end thereof is supported by the hammer. The pilot bit 110 is formed, and the outer bit 120 is fastened to the front of the pilot bit 110.

Hereinafter, the components of the drilling hammer bit according to the present invention will be described in more detail.

The pilot bit 110 has a plurality of first cutting tips 114 protrudingly formed at the front end of the body 112, the rear end is supported by a hammer and a key groove 116a is formed on the outer circumferential surface to prevent idleness The rod 116 is provided, and an air passage 117a is formed in the center thereof, and an air discharge hole 117b communicating with the air passage 117a is formed at the front end thereof.

Therefore, compressed air is guided along the air passage 117a and discharged to the air discharge hole 117b in front of the body 112.

The pilot bit 110 has a plurality of first guide grooves 112a formed at the outer circumferential surface of the body 112 and having the same shape in the front-rear direction, and the outer circumferential surface of the body 112 is formed. Accordingly, the second guide groove 112b is formed to cross the first guide groove 112a.

In this case, a locking groove 112c is formed at one side of a portion where the first and second guide grooves 112a and 112b cross each other.

In addition, a stopper part 115 protruding inward is formed in the rear side first guide groove 112a of the second guide groove 112b.

On the other hand, the outer bit 120 is formed in a cylindrical shape is provided with a second cutting tip 124 made of a plurality of cemented carbide at its front end, the inner peripheral surface of the first and second guide grooves (112a, 112b) The guide protrusions 112 which are guided and fastened to the locking grooves 112c are provided as many as the number corresponding to the first guide grooves 112a.

In addition, an extension part 126 having a reduced diameter is formed at a rear side of the outer bit 120 to mount a cylindrical case 130 surrounding the outside of the pilot bit 110.

At this time, the extension portion 126 of the outer bit 120 is formed with a support groove 126b on the surface thereof, the support on the inner peripheral surface of the front end of the cylindrical case 130 surrounding the outside of the pilot bit 110 A support protrusion 130b that extends over the groove 126b is formed so that the case 130 is fastened and supported by the surface support groove 126b of the outer bit 120.

When the pilot bit 110 and the outer bit 120 are rotated due to the operation of the hammer by such a configuration, the case 130 is maintained without being rotated so that the pilot bit 110 and the outer are rotated. When the bit 120 is rotated, the case 130 is free.

Therefore, the case 10 is maintained in a state simply supported by the outer bit 120, it is also possible to expect the effect of minimizing the power loss for drilling.

On the other hand, the locking projection 122 is a horizontal projection (122a) having a rear end of the rectangular so that the first and second guide grooves (112a, 112b) can move, and the locking projection in front of the horizontal projection (122a) (122b) is formed and consists of a (b) shape as a whole.

Therefore, the horizontal protrusion 122a of the locking protrusion 122 moves along the first and second guide grooves 112a and 112b of the pilot bit 110, and the locking step 122b of the locking protrusion 122 is performed. Is fastened to the locking groove 112c of the pilot bit 110.

On the other hand, the stopper portion 115 protrudes on the first guide groove 112a at the rear end of the second guide groove 112b, so that the horizontal protrusion 122a of the locking protrusion 122 is formed of the pilot bit 110. Since the horizontal protrusion 122a is supported by the stopper 115 while being retracted along the first guide groove 112a, the fastening operation is easy.

Hereinafter, the fastening process of the drilling hammer bit according to the present invention with reference to Figures 4 to 6 will be described in detail.

First, in order to fasten the outer bit 120 in front of the pilot bit 110, the locking protrusion 122 of the outer bit 120 is aligned with the first guide groove 112a of the pilot bit 110. Thereafter, the outer bit 120 is moved to the rear of the pilot bit 110.

In this case, when the outer bit 120 is reversed to some extent, the locking protrusion 122 of the stopper part 115 formed on the road of the first guide groove 112a naturally formed on the outer circumferential surface of the pilot bit 110 may be formed. The horizontal protrusion 122a is supported so that it is no longer reversed.

As such, when the outer bit 120 is rotated in one direction in the centrifugal direction while being supported by the stopper unit 115, the horizontal protrusion 122a of the locking protrusion 122 crosses the first guide groove 112a. It moves along the second guide groove 112b.

Then, if the rotation continues while moving along the second guide groove (112b), the locking jaw portion (122b) of the locking projection 122 is fastened to the locking groove (112c) of the pilot bit 110 is supported no longer rotated do.

As the horizontal rotation is performed at a predetermined angle as described above, a constant space portion (not shown) is formed by the first guide groove 112a of the pilot bit 110 and the inner circumferential surface 120a of the outer bit 120 to form a ground or rock ( The compressed air discharged through the pulverized product and the air discharge hole 117b generated in the process of directly drilling the front electrode layer can be moved.

On the other hand, if you want to drill the ground or rock (stone layer) and the like in this state, the pilot bit 110 should be rotated in the opposite direction, and accordingly the outer bit 120 is integrally rotated and perforated. If the drill bit 110 is rotated in the forward direction, the outer bit 120 is separated from the pilot bit 110 to be embedded in the ground or rock (stone layer). Will remain.

7 is a view showing another embodiment of the drilling hammer bit according to the present invention, the shape of the second cutting tip 124 made of cemented carbide provided in the front end portion of the outer bit 120 is the embodiment Not hemispheric as in "

Figure 112007084849611-PAT00001
"The shape of the cutting tip 124a is to be fixed by welding.

Therefore, in order to fix the cutting tip 124a, a front end of the outer bit 120 is gripped to form a seating groove (not shown), and the cutting tip 124a is inserted into the seating groove and then welded. It is fixed as.

On the other hand, Figure 8 is a view showing another embodiment of the drilling hammer bit according to the present invention, the pilot bit 110 is a body 112, the rod 116 is fastened to the rear end of the body 112 It consists of.

That is, a fastening hole 118 in which a female thread 118b is formed at a rear end of the body 112 is formed, and a male thread 116b is formed at a front end of the rod 116 to form the rod 116. The front end of the body 112 to the rear fastening hole 118 and rotate in one direction to zoom by screwing the male thread 116b of the rod 116 to the female thread 118b of the body 112. The pilot bit 110 is completed.

By separating and manufacturing the body 112 and the rod 116 as described above, the pilot bit 110 can be easily manufactured.

As described above, embodiments of the present invention have been described in detail, but the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to the embodiments of the present invention.

1 is an exploded perspective view showing a bit for a general drilling hammer.

2 is a front view of the bit for the drilling hammer according to FIG.

3 shows a cross section of the drill hammer bit according to FIG. 1;

Figure 4 is an exploded perspective view showing the drilling hammer bit in accordance with the present invention.

5 is a perspective view of the combination of the drilling hammer bit according to FIG.

6 is a view showing for explaining the coupling structure of the drilling hammer bit according to FIG.

7 shows another embodiment of a drill hammer bit in accordance with the present invention.

8 shows yet another embodiment of a drill hammer bit in accordance with the present invention.

*** Explanation of symbols for main parts of drawing ***

100: drilling hammer bit 110: pilot bit

112: body 112a: first guide groove

112b: second guide groove 112c: locking groove

114: first cutting tip 115: stopper portion

116: load 120: outer bit

122: engaging protrusion 122a: horizontal protrusion

122b: locking jaw portion 124: second cutting tip

130: case

Claims (5)

A plurality of first cutting tips 114 are provided at a front end thereof, and a pilot bit 110 having a rear end thereof supported by a hammer, and a plurality of second cutting tips 124 fastened to the front of the pilot bit 110 and provided at a front end thereof. In the drilling hammer bit consisting of an outer bit 120 is provided; The pilot bit 110 has a plurality of first guide grooves 112a having the same shape in the front-rear direction on the outer circumferential surface of the body 112, and the first guide grooves along the outer circumferential surface of the body 112. A second guide groove 112b is formed to intersect with 112a, and the first and second guide grooves 112a and 112b are formed with a locking groove 112c at one side of the intersection, and the second guide groove 112b. The stopper portion 115 is formed at the rear end of When the outer bit 120 is guided to the first guide groove 112a and supported by the stopper 115, a locking protrusion 122 is formed to be fastened to the locking groove 112c when rotated to one side. Characterized by the drill hammer bits. The method of claim 1, The locking protrusion 122 of the outer bit 120 may have a horizontal protrusion 122a having a rectangular rear end thereof so as to move the first and second guide grooves 112a and 112b, and the horizontal protrusion 122a of the horizontal protrusion 122a. Bits for drilling hammer, characterized in that the locking jaw portion (122b) is fastened to the engaging groove (112c) is formed in the forward (b) shape. The method of claim 1, An extension portion 126 supporting the cylindrical case 130 is formed at the rear end of the outer bit 120, but a support groove 126b is formed on the outer peripheral surface of the extension portion 120. On the inner circumferential surface of the front end of the case 130, a support protrusion 130b is formed that spans the support groove 126b so that the case 130 is fastened and supported by the support groove 126b of the extension portion. beat. The method of claim 1, The front end of the outer bit 120 is gripped to form a seating groove, and the welding of the seating groove "
Figure 112007084849611-PAT00002
"A drill bit for an excavation hammer, characterized in that the second cutting tip 124 is formed in a fixed shape. The method of claim 1, The pilot bit 110 has a body 112 having a plurality of first cutting tips 114 formed at a front end and a fastening hole 118 having a female thread 118b at a rear end thereof, and a male screw thread at a front end thereof. Bits for drilling hammer, characterized in that consisting of a rod 116 is fastened to the fastening hole 118 of the body 112 is formed.
KR1020070120929A 2007-11-26 2007-11-26 Hammer bit for digging KR20090054192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070120929A KR20090054192A (en) 2007-11-26 2007-11-26 Hammer bit for digging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070120929A KR20090054192A (en) 2007-11-26 2007-11-26 Hammer bit for digging

Publications (1)

Publication Number Publication Date
KR20090054192A true KR20090054192A (en) 2009-05-29

Family

ID=40861405

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070120929A KR20090054192A (en) 2007-11-26 2007-11-26 Hammer bit for digging

Country Status (1)

Country Link
KR (1) KR20090054192A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101246305B1 (en) * 2010-09-08 2013-03-21 이문수 Direct boring bit
KR101468567B1 (en) * 2013-02-15 2014-12-03 이문수 Bit assembly
KR101522197B1 (en) * 2013-07-29 2015-05-21 김명중 Down hole bit assembly
KR20150110997A (en) * 2014-03-24 2015-10-05 (주)씨엔피텍 Drilling bit
WO2017078311A1 (en) * 2015-11-02 2017-05-11 (주)씨엔피텍 Excavation bit
WO2017116001A1 (en) * 2015-12-29 2017-07-06 동림산업 주식회사 Head-enhanced drill bit
KR102240908B1 (en) * 2020-02-18 2021-04-14 윤택규 Telescopic Direction-keep Semi-shild Method
KR20240044624A (en) 2022-09-29 2024-04-05 주식회사 펠콘 Excavating bit and apparatus for direct boring comprising the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101246305B1 (en) * 2010-09-08 2013-03-21 이문수 Direct boring bit
KR101468567B1 (en) * 2013-02-15 2014-12-03 이문수 Bit assembly
KR101522197B1 (en) * 2013-07-29 2015-05-21 김명중 Down hole bit assembly
KR20150110997A (en) * 2014-03-24 2015-10-05 (주)씨엔피텍 Drilling bit
WO2017078311A1 (en) * 2015-11-02 2017-05-11 (주)씨엔피텍 Excavation bit
WO2017116001A1 (en) * 2015-12-29 2017-07-06 동림산업 주식회사 Head-enhanced drill bit
KR102240908B1 (en) * 2020-02-18 2021-04-14 윤택규 Telescopic Direction-keep Semi-shild Method
KR20240044624A (en) 2022-09-29 2024-04-05 주식회사 펠콘 Excavating bit and apparatus for direct boring comprising the same

Similar Documents

Publication Publication Date Title
KR20090054192A (en) Hammer bit for digging
JP6330573B2 (en) Drilling tools
JP2007162220A (en) Excavating rod, excavating bit, and excavating tool
KR101658658B1 (en) Drilling bit
KR20230036610A (en) Connection apparatus of steel pipe to ring bit, reinforcement apparatus of direct boring and it's installation method
KR100686697B1 (en) Tension and compressure supporting pile
KR200352180Y1 (en) Apparatus having a detachable ring bit for drilling a hole in ground
JP2006283516A (en) Excavation tool and excavation method
KR101957438B1 (en) Drilling bit with extensible casing and non-welding coupler and tunnel construction method for extended cutting pipe therewith
KR102141162B1 (en) The excavation method using continuous free surface for reducing vibration
JP2008190287A (en) Excavation tool and excavation construction method
KR20110116603A (en) Borehole drilling apparatus having extendable toe bits
KR20160004494A (en) Doughnut hammer apparatus and excavation method therefor
JP2019116808A (en) Drilling device, rotary drilling machine, drilling method and drill bit
JP2004183471A (en) Excavating tool
KR20210117910A (en) Order wall installation device and order wall installation method for constructing ground drilling and order wall using ground excavator at the same time
KR101258506B1 (en) Hammer bit structure of ground boring apparatus
JP6372732B1 (en) Drilling rig
KR20200109962A (en) Withdrawable drilling bit
KR101704216B1 (en) Expansion core bit for core drill
KR20140004680U (en) Hammer bit of excavation hammer for core barrel work
KR20190108780A (en) Sd nailing method
KR102613542B1 (en) Under reaming auger apparatus and under reamed pile construction method using the same
JP2005320811A (en) First casing used in execution 0f cast-in-place pile
JP2019094708A (en) Excavating device, rotary excavator, excavation method and drilling bit

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E601 Decision to refuse application
AMND Amendment
J201 Request for trial against refusal decision
B601 Maintenance of original decision after re-examination before a trial
J301 Trial decision

Free format text: TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 20090707

Effective date: 20100526