KR200345564Y1 - liner outflow preventing structure of hammer bit striking apparatus for excavation - Google Patents

Abstract

The present invention relates to a liner leakage prevention structure of the hammer bit impact device for drilling, the lower end of the back head is coupled to the upper end in a long tube, and the lower inner side by the chuck repeatedly formed a plurality of recesses and protrusions on the inner circumference A sleeve tube in which the fixed hammer bit is slidably coupled, and a plurality of recesses and protrusions are repeatedly formed on the upper outer circumference and positioned above the hammer bit inside the sleeve tube to move up and down reciprocatingly on the inner side of the sleeve tube to lower the hammer bit. In the excavation hammer bit striking device having a piston striking the furnace and a liner which is a cushioning material filled in the gap between the chuck and the hammer bit, an insertion groove formed outwardly on the inner circumference of the chuck at the bottom of the liner, A plurality of recesses and protrusions corresponding to the outer periphery of the piston are formed at the inner periphery and the inner periphery so that the piston can be elevated. The plate-chain liner bearing ring prevents the leakage of the liner filled in the gap between the hammer bit and the chuck from the bottom to enhance the durability of the hammer bit, prolong the service life and reduce the operation noise. There is a significant cost savings.

Description

Liner outflow preventing structure of hammer bit striking apparatus for excavation

The present invention relates to a liner outflow prevention structure of the drilling hammer bit strike device, more specifically, to prevent the flow of the liner filled in the gap between the hammer bit and the chuck from the bottom to increase the durability of the hammer bit to increase the service life The present invention relates to a liner leakage prevention structure of a drilling hammer bit striking device that can extend the length, reduce the operation noise, and thus greatly reduce the operating cost.

In general, a drill is a machine for making holes (blasting holes) for loading explosives for blasting rocks. The drill is divided into leg drills, sinkers, and drifters depending on the purpose of use. Drifter is used a lot to prevent vibration and vibration. Among them, the blow type (hammer type) operated by compressed air is the most widely used. This is caused by the piston reciprocating in the cylinder with the force of compressed air hitting the rear end of the working rod. At the end of the work rod is a chisel (drilling bit). The point that the construction rod is rotated by the ratchet mechanism when the piston retracts is different from the coal pick. A rotary drill is an electric motor that rotates a construction rod with spiral ribs. It is used to drill holes in fragile layers such as coal and shale.

Bits are tools used to drill holes in rock, such as cutting tools at the end of rods and boring cutting tools. Before the Second World War, bits were usually quenched from carbon steel. At present, the tip of cemented carbide or hard alloy is welded to the surface to prevent blunt blade tip.

Various types are used depending on the type of drilling machine and the nature and shape of the rock to be drilled.

The rock drill bit is for blow type rock drills, and when the blade tip is worn, it is separated so that it can be replaced. Wedge-shaped blade ends are straight, and these are crossed by a + character.

Boring bits are bits for rotary boring, in which industrial diamonds are embedded in soft alloys, three gear-type rollers are put together, cemented carbide tips are inserted into the circumference, and cylindrical grooves are cut. And so on.

Among these bits, diamond bits are boring bits made by using diamond as a cutting material, and are also called crowns. According to the type of diamond used, it is classified into carbon bit and bortz bit. Carbon beet is made by four to eight hand-carved carbonado, a relatively large Brazilian earthy diamond at one end of a mild steel edge. 70 pieces (now 100-200 pieces) are made by hand or machine. Thus, bits are classified into hand set bits and mechanical set bits that are driven by a machine according to the method of driving.

In addition, the mechanical set bit is sintered by casting a cast bit in the base of a beryllium-copper alloy and a bolt in a light alloy base in which cobalt (Co) is applied to tungsten carbide (WC). It is classified as a shaped sintered bit. Botsbit also has a surface bit that has been bolted only to its surface and an impregnated bit that is uniformly distributed in the ground with a diamond of fine powder close to the powder. In addition, bits are classified into coring bits and non coring bits according to whether cores are collected, and the latter examples include pilot bits. At present, carbon bits are rarely used, and a method of driving with a machine is mainly used.

There are two types of bits: American, Canadian, British, and Swedish. The outer diameters of the bits are usually 1˝7 / 16 (EX) to 2˝15 / 16 (NX), but oil field Larger diameters are used in the landings of Matsukawa. The quality and grain size of the diamond, its arrangement and direction, the degree of protrusion on the surface of the base, the material and hardness of the base greatly influence the cutting precision of the bit and the efficiency of boring.

Excavation hammer bit striking device having such a bit is located at the bottom of the back head inlet hole and the back head is formed in the inlet hole in which a constant pressure of pneumatic pressure flows in the center to prevent the inlet pneumatic flow out back into the inlet hole of the back head The check valve and the long pipe, the lower end of the back head is hermetically coupled to the upper end, and the lower end of the sleeve tube slidably coupled to the hammer bit fixed to the chuck, and the upper position of the hammer bit inside the sleeve tube A piston that reciprocates up and down on the inner side of the sleeve tube and strikes the hammer bit downward, and is located between the piston and the back head inside the sleeve tube and distributes the pneumatic flow introduced into the inlet hole of the back head to move the piston up and down to make the hammer bit It consists of an air distributor that strikes.

The upper outer circumference of the hammer bit is lifted from the inner circumference of the chuck, and the inner circumference of the chuck fixed to the lower end of the sleeve tube is repeatedly formed with protrusions and recesses, and the upper outer circumference of the hammer bit coupled thereto also has corresponding recesses and protrusions. Formed repeatedly, the hammer bit is lifted by the striking force of the piston.

At this time, a gap is formed between the outer circumference of the hammer bit and the inner circumference of the chuck, and the gap is filled in the gap to fill the liner with a cushioning material that prevents the hammer bit from being worn due to friction and collision when the hammer bit is lifted.

However, as the operation of the hammer bit progresses, the liner melts due to frictional heat and flows along the gap and is lost, and after a certain time, the operation noise due to the collision when the hammer bit is raised due to the gap between the hammer bit and the chuck is generated. Due to such a collision, the wear of expensive hammer bits proceeds rapidly, resulting in an extremely short lifespan.

The present invention is to solve the conventional problems as described above, by suppressing the outflow of the liner filled in the gap between the hammer bit and the chuck from the bottom to enhance the durability of the hammer bit to extend the service life and reduce the operating noise Therefore, the object of the present invention is to provide a liner outflow prevention structure of the hammer bit impact device for drilling, which can greatly reduce the operating cost.

In order to achieve the above object, the present invention is a long tubular body, the upper end of which is coupled to the lower end of the back head is hermetically coupled to the lower inner side so that the hammer bit fixed by the chuck repeatedly formed with a plurality of recesses and protrusions on the inner periphery. The sleeve tube to be coupled, a plurality of recesses and protrusions are formed on the upper outer periphery repeatedly and positioned on the upper side of the hammer bit inside the sleeve tube, the piston reciprocating up and down on the inner side of the sleeve tube and hitting the hammer bit downward, the chuck and the hammer An excavation hammer bit striking device having a liner which is a cushioning material filled in a gap between bits;

An insertion groove formed outwardly at an inner circumference of the chuck at the bottom of the liner;

The outer circumference is inserted into the insertion groove of the chuck inner circumference and the inner circumference has a feature of having a liner support ring which is a plate body formed with a plurality of recesses and protrusions corresponding to the outer circumference of the piston so that the piston can move up and down.

1 is a plan view showing a state of the present invention,

Figure 2 is an enlarged cross-sectional view of the main installation state showing the use state of the present invention embodiment,

3 is an enlarged cross-sectional view of a main part of the enlarged portion A of FIG. 2;

4 is a cross-sectional view taken along the line B-B in FIG.

* Description of the symbols for the main parts of the drawings *

10: liner support ring 11: the main part

12: protrusion 20: chuck

21: insertion groove 23: main part

24: protrusion 30: liner

40: hammer bit 41: main part

42: protrusion 50: piston

60: sleeve tube

Hereinafter, the present invention in more detail by the accompanying drawings as follows.

1 is a plan view showing a state of the present invention embodiment, Figure 2 is an enlarged cross-sectional view of the main portion of the installation state showing the use state of the present invention embodiment, Figure 3 is an enlarged cross-sectional view of the main portion enlarged portion A of Figure 2, Figure 4 It is sectional drawing along the BB line of FIG.

The liner outflow prevention structure of the hammer bit striking device of the present invention is a long pipe, and the lower end of the back head is hermetically coupled to the inside of the upper end, and the plurality of recesses 23 and the protrusion 24 are repeated on the inner circumference of the lower end. The sleeve 60 is slidably coupled to the hammer bit 40 fixed by the formed chuck 20, and a plurality of recesses 51 and protrusions 52 are repeatedly formed on the upper outer circumference and the sleeve 60 is formed. Piston 50 and the chuck 20 and the hammer bit 40 which is located on the upper side of the hammer bit 40 and reciprocating up and down on the inner surface of the sleeve tube 60 and strikes the hammer bit 40 downward. Liner 30 which is a cushioning material filled in the gap between the insertion groove 21 formed on the inner circumference of the inner circumference of the chuck 20 at the bottom of the liner 30, and the outer circumference is the insertion groove of the inner circumference of the chuck 20 ( 21 and a plurality of recesses 11 corresponding to the outer circumference of the piston 50 so that the piston 50 can be lifted and lowered on the inner circumference thereof. Protrusion consists of a plate chain liner support ring 10 (12) is formed.

Referring to the use state of the present invention as follows.

First, when descending from the inner circumference of the sleeve tube 60 of the piston 50 to hit the upper surface of the hammer bit 40 downward, the hammer bit 40 is coupled to the lower end of the sleeve tube 60 by this striking force The inner surface of the chuck 20 and the inner periphery protrusion 24 and the recessed portion 23 is lowered to the bottom to excavate the ground surface

At this time, when the hammer bit 40 is repeatedly raised and lowered on the inner circumference of the chuck 20 by the piston 50, the recess 23 and the projection 24 and the hammer bit 40 of the inner circumference of the chuck 20. The liner 30, which is a cushioning material interposed between the recess 41 and the protrusion 42 of the outer circumference, is melted by the frictional heat between the hammer bit 40 and the chuck 20.

The liner 30 interposed between the recess 23 and the protrusion 24 of the inner circumference of the chuck 20 and the recess 41 and the protrusion 42 of the outer circumference of the hammer bit 40 is gradually melted and flows out downward. On the other hand, the liner support ring 10 coupled to the insertion groove 21 of the chuck 20 does not flow out of the lower portion and is stacked on the liner support ring 10 to remain.

The inner periphery of the liner bearing ring 10 is formed with protrusions 12 and recesses 11 corresponding to the recesses 41 and the protrusions 42 of the outer periphery of the hammer bit 40, and thus the outer periphery of the hammer bit 40. The liner 30 is prevented from leaking to the bottom of the liner support ring 10.

The liner 30 left above the liner support ring 10 is the protrusion 42 and the recess 41 and the inner circumference of the chuck 20 of the outer circumference of the hammer bit 40 which are continuously elevated at the inner circumference of the chuck 20. Wearing the hammer bit 40 by filling the gap formed between the protrusions 24 and the recess 23 of the hammer bit 40 while preventing the hammer bit 40 from moving left and right while filling the gap formed between the protrusions 24 and the recess 23. Effectively prevent.

The operation noise of the hammer bit 40 is greatly reduced and has a semi-permanent lifespan greatly reduces the cost.

As such, the present invention suppresses the outflow of the liner filled in the gap between the hammer bit and the chuck from the bottom to enhance the durability of the hammer bit, thereby extending the service life and reducing the operating noise, thereby reducing the cost of operation. There is a significant savings effect.

The present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (1)

The lower end of the back head is hermetically coupled to the inside of the upper end with a long tube, and the hammer bit 40 fixed by the chuck 20 repeatedly formed with a plurality of recesses 23 and protrusions 24 on the inner circumference is sliding. A sleeve tube 60 that is possibly coupled, and a plurality of recesses 51 and protrusions 52 are repeatedly formed on the upper outer circumference and positioned above the hammer bit 40 inside the sleeve tube 60, and thus the sleeve tube 60. For excavation having a piston 50 that vertically reciprocates on the inner side and strikes the hammer bit 40 downward, and a liner 30 that is a cushioning material filled in the gap between the chuck 20 and the hammer bit 40. In the hammer bit striking device; An insertion groove 21 formed at an inner circumference of the chuck 20 at the bottom of the liner 30; The outer circumferential edge is inserted into the insertion groove 21 of the inner circumference of the chuck 20, and the plurality of recesses 11 and the protrusion 12 corresponding to the outer circumferential edge of the piston 50 so that the piston 50 can be lifted and lowered on the inner circumference. Liner support ring of the excavation hammer bit striking device, characterized in that it is provided with a liner support ring is formed plate.