KR102719479B1 - Drilling bit and low noise rock drill comprising the drilling bit - Google Patents

Abstract

Since the drill bit disclosed includes a bit connection portion, a bit body portion, and a bit recessed hole, there is an advantage in that a drilling hole can be accurately formed in a required size in a drilling target while reducing the size of the hydraulic pressure for forming the drilling hole.

Description

Drilling bit and low noise rock drill comprising the drilling bit

The present invention relates to a drill bit and a low-noise rock drill including the drill bit.

A rock drill is a device that uses hydraulic pressure to form a drilling hole of a certain depth in at least one rock or ground existing at a construction site and where drilling is required.

An example of such a drilling rig is that of the registered patent No. 10-2198443 among the patent documents presented below.

A drill bit is applied to the front side of the above-mentioned rock drill to contact the above-mentioned perforation target object and perforate the above-mentioned perforation target object so as to form the above-mentioned perforation hole.

An example of the above conventional drill bit is that presented as drawing number 104 in registered utility model No. 20-0410010 among the patent documents presented below.

However, according to the conventional drill bit, since the drill bit is formed in the shape of a circular column and the drilling target is drilled by hydraulic pressure applied from the main body of the rock drill to form the drilling hole, there is a problem in that the peripheral part of the drilling hole in the drilling target is broken together, and the drilling hole is formed larger than the required size, so the drilling hole is not formed accurately to the required size, and an excessive amount of hydraulic pressure is required to form the drilling hole.

Patent registration No. 10-2198443, registration date: 2020.12.29., title of invention: Perforation device for construction site Utility Model Registration No. 20-0410010, Registration Date: 2006.02.22., Title of Invention: Hydraulic Circuit System for Rock Drilling Device

The present invention aims to provide a drill bit capable of accurately forming a perforation hole in a perforation target object to a required size while reducing the size of hydraulic pressure for forming the perforation hole, and a low-noise rock drill including the drill bit.

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A low-noise rock drill according to one aspect of the present invention forms a drilling hole of a certain depth using hydraulic pressure in a drilling target object that is at least one of a rock or ground existing at a construction site and requires drilling.
A boom connecting member connected to a boom of heavy equipment; a drift support member connected to the boom connecting member and formed in a long bar shape with a predetermined length; a rod rotatably arranged on the drift support member; and a drill bit connected to a front side of the rod and configured to perforate the perforation target to form the perforation hole;
The above drill bit includes a bit connection portion connected to the front side of the rod, a bit body portion formed in the shape of a circular column with a predetermined outer diameter in the front direction from the front side of the bit connection portion, and a bit recessed hole formed with a diameter that is smaller by a predetermined size than the outer diameter of the bit body portion while having the same center as the center of the bit body portion, and is recessed to a predetermined depth along the inside of the bit body portion.
When the bit body part is advanced to contact the perforation target and perforate the perforation target by the hydraulic pressure applied from the low-noise rock drill, a part of the perforation target corresponding to the inside of the perforation hole is inserted into the inside of the bit depression hole, and the bit body part forms a perforation hole intermediate body having a circular ring cross-section in the perforation target.
The above low-noise rock drill further includes a drilling pliers unit which is inserted into the drill hole intermediate body from which the drill bit has been removed, and picks up and removes the circular column residue in the shape of a circular column inside the drill hole intermediate body to the outside;
The perforation forceps unit comprises: a perforation first forceps inserted into one side of the perforation hole intermediate body and capable of grasping one side of the perforation hole intermediate body; a perforation first extension extending from the rear side of the perforation first forceps; a perforation second forceps capable of grasping a portion of the perforation hole intermediate body symmetrical to a portion grasped by the perforation first forceps with respect to the center of the perforation hole intermediate body; a perforation second extension extending from the rear side of the perforation second forceps and intersecting with the perforation first extension body in an X shape; a perforation forceps rotation axis penetrating through the intersection of the perforation first extension body and the perforation second extension body and rotatably connecting the perforation first extension body and the perforation second extension body; and a perforation first forceps rotation axis installed between the perforation first extension body and the perforation second extension body so that the gap between the perforation first forceps and the perforation second forceps can be adjusted. It is characterized by including a forceps gap adjusting means for adjusting the gap between the first perforation extension body and the second perforation extension body.

According to a drill bit and a low-noise rock drill including the drill bit according to one aspect of the present invention, since the drill bit includes a bit connection portion, a bit body portion, and a bit recessed hole, there is an effect in that a drilling hole can be accurately formed in a required size in a drilling target while reducing the size of the hydraulic pressure for forming the drilling hole.

FIG. 1 is a plan view showing a low-noise rock drill including a drill bit according to one embodiment of the present invention.
Figure 2 is a perspective view showing a drill bit according to one embodiment of the present invention.
Figure 3 is a cross-sectional view of a drill bit according to one embodiment of the present invention.
FIG. 4 is a plan view showing a noise reduction hydraulic unit constituting a low-noise rock drill according to one embodiment of the present invention.
FIG. 5 is a front view showing a noise reduction hydraulic unit constituting a low-noise rock drill according to one embodiment of the present invention.
FIG. 6 is a right side view showing a noise reduction hydraulic unit constituting a low-noise rock drill according to one embodiment of the present invention.
FIG. 7 is a perspective view showing a perforation grip unit constituting a low-noise rock drill according to one embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a perforation hole intermediate formed in a perforation target by a drill bit according to one embodiment of the present invention.
FIG. 9 is an enlarged view of a portion of a low-noise rock drill according to another embodiment of the present invention.

Hereinafter, a drill bit and a low-noise rock drill including the drill bit according to embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a low-noise rock drill including a drill bit according to an embodiment of the present invention, FIG. 2 is a perspective view showing a drill bit according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of a drill bit according to an embodiment of the present invention, FIG. 4 is a plan view showing a noise reduction hydraulic unit constituting a low-noise rock drill according to an embodiment of the present invention, FIG. 5 is a front view showing a noise reduction hydraulic unit constituting a low-noise rock drill according to an embodiment of the present invention, FIG. 6 is a right side view showing a noise reduction hydraulic unit constituting a low-noise rock drill according to an embodiment of the present invention, FIG. 7 is a perspective view showing a drilling grip unit constituting a low-noise rock drill according to an embodiment of the present invention, and FIG. 8 is a cross-sectional view showing a state in which a drilling hole intermediate body is formed in a drilling target by a drill bit according to an embodiment of the present invention.

Referring to FIGS. 1 to 8 together, a low-noise rock drill (100) according to the present embodiment forms a drilling hole of a certain depth using hydraulic pressure in a drilling target (20) that is at least one of a rock or ground existing at a construction site and requires drilling, and includes a boom connecting member (110), a drift support member (115), a rod (120), and a drill bit (170).

In addition, the low-noise rock drill (100) may further include a perforation gripper unit (180) and a noise reduction hydraulic unit (140).

The above boom connecting member (110) is connected to the boom of heavy equipment.

Drawing number 111 is a boom connecting member formed at the end of the boom connecting member (110) and connected to the boom of the heavy equipment.

The above drift support member (115) is rotatably connected to the boom connecting member (110) by a rotation shaft (116).

The above drift support member (115) is formed in a long bar shape with a certain length, and one side of the drift support member (115) is connected to the boom connection member (110) by the rotation axis (116).

Drawing number 117 is a boom connecting rotation hydraulic cylinder capable of changing the angle between the boom connecting member (110) and the drift support member (115).

The above load (120) is rotatably placed on the drift support member (115).

The above load (120) is arranged along the upper portion of the drift support member (115) in the longitudinal direction of the drift support member (115).

The above drill bit (170) is connected to the front side of the rod (120) and perforates the perforation target (20) to form the perforation hole.

The above drill bit (170) is configured to come into contact with the perforation target (20) to form the perforation hole and perforate the perforation target (20), and includes a bit connection portion (172), a bit body portion (171), and a bit recessed hole (173).

The above bit connection part (172) is connected to the front part of the low-noise rock drill (100) (more specifically, the front part of the rod (120)).

For example, a load-side screw thread (121) may be formed on the outer surface of the front side of the load (120), and the bit connection portion (172) may be formed of a bit-side screw thread that can engage with the load-side screw thread (121).

The above bit body part (171) is formed in the shape of a circular column with a certain outer diameter in the forward direction from the front side of the bit connection part (172).

The above bit recessed hole (173) is formed with a diameter that is smaller by a certain size compared to the outer diameter of the bit body (171) while having the same center as the center of the bit body (171), but is formed by recessing to a certain depth along the inside of the bit body (171).

The above bit body part (171) and the above bit recessed hole (173) are formed in a tube shape overall.

When the bit body (171) is advanced to contact the perforation target (20) and perforate the perforation target (20) by hydraulic pressure applied from the above low-noise rock drill (100) (more specifically, the hydraulic low-noise rock drill (145) constituting the noise reduction hydraulic unit (140), described later), a portion of the perforation target (20) corresponding to the inside of the perforation hole (a portion corresponding to the circular column remnant (12) described later) is inserted into the inside of the bit recessed hole (173), and the bit body (171) forms a perforation hole intermediate body (10) having a circular ring cross-section shape in the perforation target (20).

As shown in Fig. 8, the perforation hole intermediate body (10) formed by the drill bit (170) is composed of a perforation intermediate hole (11) penetrated to a certain depth in the shape of a circular ring cross section, and a circular pillar residual body (12) remaining in the shape of a circular pillar in the central portion of the perforation intermediate hole (11) which is the interior of the perforation hole intermediate body (10).

When the above circular column remnant (12) is removed by the above perforation forceps unit (180), the perforation hole can be completed.

The above drill bit (170) includes a plurality of perforation projections (174) that are formed protruding on the front surface of the bit body (171), the outer surface of the front side of the bit body (171), and the inner surface of the front side of the bit body (171).

Each of the above perforation protrusions (carbide) (174) is formed in a hemispherical shape or the like to protrude from the front surface of the bit body (171), the outer surface of the front side of the bit body (171), and the inner surface of the front side of the bit body (171), thereby preventing slippage of the drill bit (170) when the drill bit (170) forms the perforation hole intermediate body (10), thereby allowing the perforation intermediate hole (11) to be easily formed in the perforation target body (20).

The above-described noise reduction hydraulic unit (140) includes a unit base (150) connected to the drift support member (115), a hydraulic low-noise drilling unit (145) such as a hydraulic cylinder arranged on the unit base (150) to rotate and advance the rod (120) so that the drill bit (170) can drill the drilling target (20), and a noise reduction casing (141) coupled to the unit base (150) and arranged in a form that surrounds the hydraulic low-noise drilling unit (145).

The above unit base (150) is in the form of a flat plate connected to the rear end of the drift support member (115).

The above noise reduction casing (141) is formed in the shape of a rectangular box that is sealed to the outside and is connected to the unit base (150), and the hydraulic low-noise rock drilling unit (145) is installed internally in the noise reduction casing (141).

The main body of the above-described hydraulic low-noise drilling unit (145) is installed inside the above-described noise reduction casing (141), and only the piston (146) of the above-described hydraulic low-noise drilling unit (145) protrudes outside the above-described noise reduction casing (141), so that the rod (120) is connected to the piston (146) of the above-described hydraulic low-noise drilling unit (145), so that when the above-described hydraulic low-noise drilling unit (145) rotates and advances the piston (146), the rod (120) also rotates and advances, causing the drill bit (170) connected to the front side of the rod (120) to form the above-described perforation hole.

In this embodiment, the inside of the noise reduction casing (141) is filled with the liquid noise reduction material, so that the hydraulic low-noise drilling unit (145) is immersed in the noise reduction material inside the noise reduction casing (141). Then, the noise generated when the hydraulic low-noise drilling unit (145) operates is absorbed by the noise reduction material, and accordingly, the transmission of noise to the outside of the noise reduction casing (141) during the operation of the hydraulic low-noise drilling unit (145) can be reduced, and the hydraulic low-noise drilling unit (145) can be cooled by the noise reduction material.

Here, water can be suggested as the noise reduction material.

A hydraulic connection panel (142) is formed on the rear side of the above noise reduction casing (141), and a plurality of pipe connections (143) are formed on the hydraulic connection panel (142) to which hydraulic pipes connecting an external hydraulic pump and the above hydraulic low-noise rock drilling unit (145) are connected.

Hydraulic pressure can be supplied from the hydraulic pump to the hydraulic low-noise drilling unit (145) through the above pipe connection (143).

Meanwhile, the noise reduction hydraulic unit (140) includes a one-side damage prevention member (151) arranged along the upper portion of one of the two side surfaces of the noise reduction casing (141) to protect the noise reduction casing (141) from external impact, and a other-side damage prevention member (160) arranged along the upper portion of the other of the two side surfaces of the noise reduction casing (141) to protect the noise reduction casing (141) from external impact.

The above-mentioned one-side damage prevention member (151) and the other-side damage prevention member (160) are arranged symmetrically with the noise reduction casing (141) interposed therebetween.

In detail, the one-side damage prevention member (151) comprises a front one-side pillar (152) erected on one side of the front portion of the noise reduction casing (141), a front one-side tilting member (153) formed in a shape that is inclined outwardly compared to the front one-side pillar (152) so as to extend from the upper portion of the front one-side pillar (152) but face toward the upper portion of one of the two side portions of the noise reduction casing (141), a rear one-side pillar (154) erected on one side of the rear portion of the noise reduction casing (141) so as to be symmetrical with the front one-side pillar (152) with the noise reduction casing (141) interposed therebetween, and a rear one-side pillar (154) extending from the upper portion of the rear one-side pillar (154) so as to be symmetrical with the front one-side tilting member (153) with the noise reduction casing (141) interposed therebetween but face toward the upper portion of one of the two side portions of the noise reduction casing (141). It includes a rear one-side tilting body (155) formed in a shape that is tilted outward compared to the rear one-side pillar (154), and a one-side cross damage prevention connecting body (156) that is arranged along the upper part of one of the two side portions of the noise reduction casing (141) to a certain length and whose front and rear sides are connected to the front one-side tilting body (153) and the rear one-side tilting body (155).

The front one-side pillar (152) is vertically erected at a certain height on the unit base (150) at a position spaced apart from the front of the noise reduction casing (141), and the front one-side tilting body (153) is formed in a form that extends upward from the upper part of the front one-side pillar (152) but gradually tilts outward as it goes upward, and extends from the upper part of the front part of the noise reduction casing (141) to an upper part that is relatively further outward than the upper part of the side of the noise reduction casing (141), and the rear one-side pillar (154) is vertically erected at a certain height on the unit base (150) at a position spaced apart from the rear of the noise reduction casing (141), and the rear one-side tilting body (155) is formed in a form that extends upward from the upper part of the rear one-side pillar (154) but gradually tilts outward as it goes upward, and the noise reduction The upper portion of the rear surface of the casing (141) extends to an upper portion that is relatively further outward than the upper portion of the side surface of the noise reduction casing (141), and the one-sided cross breakage prevention connecting member (156) connects the upper portion of the front one-sided inclination body (153) and the upper portion of the rear one-sided inclination body (155), but is spaced apart from the upper one-sided edge of the noise reduction casing (141) by a certain distance and is arranged parallel to the upper one-sided edge of the noise reduction casing (141).

The above-mentioned other-side damage prevention member (160) comprises a front other-side pillar (161) erected on the other side of the front portion of the noise reduction casing (141), a front other-side tilting member (162) formed in a form that is inclined outwardly compared to the front other-side pillar (161) so as to extend from the upper portion of the front other-side pillar (161) but face the upper portion of the other side of the noise reduction casing (141), a rear other-side pillar (163) erected on the other side of the rear portion of the noise reduction casing (141) so as to be symmetrical with the front other-side pillar (161) with the noise reduction casing (141) interposed therebetween, and a rear other-side pillar (163) erected so as to be symmetrical with the front other-side tilting member (162) with the noise reduction casing (141) interposed therebetween, and a rear other-side pillar (163) extending from the upper portion of the rear other-side pillar (163) so as to be symmetrical with the front other-side tilting member (162) with the noise reduction casing (141) interposed therebetween but face the upper portion of the other side of the noise reduction casing (141). It includes a rear other-side tilting body (164) formed in a shape that is tilted outward compared to the rear other-side pillar (163), and an other-side cross damage prevention connecting body (165) that is arranged along the upper part of the other of the two side portions of the noise reduction casing (141) to a certain length and whose front and rear sides are connected to the front other-side tilting body (162) and the rear other-side tilting body (164).

The front other side pillar (161) is vertically erected at a certain height on the unit base (150) so as to be symmetrical with the front one side pillar (152) at a position spaced apart from the front of the noise reduction casing (141), and the front other side tilting body (162) is formed in a shape that extends upward from the upper part of the front other side pillar (161) but gradually tilts outward as it goes upward, so as to extend from the upper part of the front part of the noise reduction casing (141) to an upper part that is relatively further outward than the upper part of the side of the noise reduction casing (141), and the rear other side pillar (163) is vertically erected at a certain height on the unit base (150) so as to be symmetrical with the rear one side pillar (154) at a position spaced apart from the rear part of the noise reduction casing (141), and the rear other side tilting body (164) is formed from the upper part of the rear other side pillar (163). It is formed in a shape that extends upward but gradually tilts outward as it goes upward, and extends from the upper part of the rear part of the noise reduction casing (141) to an upper part that is relatively further outward than the upper part of the side of the noise reduction casing (141), and the other side cross breakage prevention connecting member (165) connects the upper part of the front other side tilting body (162) and the upper part of the rear other side tilting body (164), but is spaced apart from the upper other side edge of the noise reduction casing (141) by a certain distance and is arranged parallel to the upper other side edge of the noise reduction casing (141).

In addition, the noise reduction hydraulic unit (140) includes a plurality of cross breakage prevention connectors (157) arranged so as to be spaced apart from each other in a form that crosses the upper part of the noise reduction casing (141) in a lateral direction to connect the one-side cross breakage prevention connector (156) and the other-side cross breakage prevention connector (165) to each other, and a plurality of cross supports (158) arranged so as to be spaced apart from each other in a form that crosses the upper part of the noise reduction casing (141) in a front-back direction to connect the respective cross breakage prevention connectors (157) to each other.

A plurality of the above cross breakage prevention connecting bodies (157) and a plurality of the above cross supports (158) are connected to each other and formed in a grid shape to protect the upper part of the above noise reduction casing (141).

As described above, since the noise reduction hydraulic unit (140) includes the one-side damage prevention member (151), the other-side damage prevention member (160), the cross damage prevention connecting member (157), and the cross support member (158), the noise reduction casing (141) can be protected from damage by rock fragments, etc. that fall during the work of forming the perforation hole in the perforation target (20).

Drawing number 130 is an axial support member that is coupled to the front side of the drift support member (115) and through which the rod (120) is rotatably passed and supported.

The above-mentioned perforation forceps unit (180) is inserted into the perforation hole intermediate body (10) from which the drill bit (170) has been removed, and picks up the circular pillar remnants (12) in the shape of a circular pillar inside the perforation hole intermediate body (10) and removes them to the outside.

In detail, the perforation gripper unit (180) comprises a perforation first gripper (181) that is inserted into one side of the perforation hole intermediate body (10) and can grip one side of the perforation hole intermediate body (10), a perforation first extension body (183) that extends from the rear side of the perforation first gripper (181), a perforation second gripper (182) that can grip a portion of the perforation hole intermediate body (10) that is symmetrical to the portion gripped by the perforation first gripper (181) based on the center of the perforation hole intermediate body (10), a perforation second extension body (184) that extends from the rear side of the perforation second gripper (182) and intersects the perforation first extension body (183) in an X shape, and a perforation first extension body (183) that intersects the perforation second extension body (184) at the intersection of the perforation first extension body (183) and the perforation second extension body (184). It includes a perforation forceps rotation shaft (185) that rotatably connects the perforation first extension body (183) and the perforation second extension body (184) by penetrating, and a forceps gap adjustment means (188) such as a hydraulic cylinder that is installed between the perforation first extension body (183) and the perforation second extension body (184) so that the gap between the perforation first extension body (183) and the perforation second extension body (184) can be adjusted.

The above-mentioned first perforation forceps (181) and the above-mentioned second perforation forceps (182) are each formed as a curved body that can be inserted into the above-mentioned perforation middle hole (11) and are formed in a shape facing each other, and the above-mentioned first perforation extension body (183) and the above-mentioned second perforation extension body (184) are formed in a shape that intersects in an X shape.

An extension connection hole (186, 187) is formed at each end of the first perforation extension (183) and the second perforation extension (184), so that a connecting means such as a bolt passes through the extension connection hole (186, 187), thereby allowing the perforation gripper unit (180) to be connected to the boom of the heavy equipment from which the boom connection member (110) has been removed.

The cylinder body of the forceps gap adjustment means (188) is rotatably connected to the end of one of the perforation first extension (183) and the perforation second extension (184), and the piston of the forceps gap adjustment means (188) is rotatably connected to the end of the other of the perforation first extension (183) and the perforation second extension (184), so that when the piston of the forceps gap adjustment means (188) is inserted into the cylinder body of the forceps gap adjustment means (188), the perforation first forceps (181) and the perforation second forceps (182) are formed to be parallel to each other so that they can be inserted into the perforation middle hole (11), and when the piston of the forceps gap adjustment means (188) protrudes from the cylinder body of the forceps gap adjustment means (188), the perforation first forceps (181) and the The second perforation forceps (182) are inserted into the perforation center hole (11) and pressurized from both sides to grasp the circular column residue (12).

When the perforation gripper unit (180) is retracted entirely while the first perforation gripper (181) and the second perforation gripper (182) are holding the circular column remnant (12), the circular column remnant (12) is removed from the perforation middle hole (11) while being held by the first perforation gripper (181) and the second perforation gripper (182), thereby enabling the perforation hole to be formed.

As described above, since the drill bit (170) includes the bit connection portion (172), the bit body portion (171), and the bit recessed hole (173), the drilling hole can be accurately formed in the drilling target (20) to a required size, while the size of the hydraulic pressure for forming the drilling hole can be reduced.

Hereinafter, a drill bit and a low-noise rock drill including the drill bit according to another embodiment of the present invention will be described with reference to the drawings. In performing this description, any description that overlaps with the content already described in one embodiment of the present invention described above will be omitted here.

FIG. 9 is an enlarged view of a portion of a low-noise rock drill according to another embodiment of the present invention.

Referring to FIG. 9, in the present embodiment, the piston (246) of the hydraulic low-noise drilling unit (245) arranged inside the noise reduction casing (241) protrudes together forward and backward of the hydraulic low-noise drilling unit (245), and the portion of the piston (246) protruding forward of the hydraulic low-noise drilling unit (245) is connected to a rod, and the portion of the piston (246) protruding backward of the hydraulic low-noise drilling unit (245) is formed in a form in which it protrudes a certain length into the internal space of the noise reduction casing (241).

The rear one-side pillar (254), the rear one-side tilt body and the one-side cross breakage prevention connector (256) are formed entirely in the form of a single hollow connector.

The low-noise rock drill according to the present embodiment further includes a flow generating unit (290) that generates flow in the noise reduction material inside the noise reduction casing (241).

The above-mentioned flow generating unit (290) comprises a flow generating rotation shaft (291) that extends from a portion protruding from the rear of the hydraulic low-noise drilling unit (245) of the piston (246) to the internal space of the noise reduction casing (241), a flow generating rotational blade (292) that is connected to the flow generating rotational shaft (291) and rotates according to the rotation of the flow generating rotational shaft (291) to generate flow in the noise reduction material inside the noise reduction casing (241), a flow inducing curved body (293) that is formed on the internal rear surface of the noise reduction casing (241) to face the flow generating rotational blade (292) and is formed in a curved shape that is sunken with a certain curvature so that the noise reduction material flowing by the flow generating rotational blade (292) comes into contact with it and is guided in the internal front direction of the noise reduction casing (241), and a flow generating A casing pillar communication body (294) formed at the center portion that contacts an imaginary line extending axially from a rotational axis (291) and connects the inside of the noise reduction casing (241) and the inside of the rear one-side pillar (254) so that some of the noise reduction material flowed by the flow-generating rotary blade (292) flows into the inside of the rear one-side pillar (254), a flow accelerator (295) that extends from the flow-generating rotational axis (291) and is inserted into the inside of the casing pillar communication body (294) and has screw blades formed on the outer surface to accelerate the flow of the noise reduction material through the casing pillar communication body (294), and a flow accelerator (295) that is protruded from the inner surface of the rear one-side pillar (254) so as to face the outlet of the casing pillar communication body (294) on the rear one-side pillar (254) so that the noise reduction material flowed through the casing pillar communication body (294) comes into contact with the rear one-side pillar (254) A guide curved body (296) formed in a curved shape with a certain curvature to be guided toward the slanted body, an acceleration through hole (297) formed across the casing column communicating body (294) and the flow inducing curved body (293) so that the surfaces of the casing column communicating body (294) and the flow inducing curved body (293) are communicated so that some of the noise reduction material flowing through the casing column communicating body (294) is sprayed toward the surface of the flow inducing curved body (293), and a cross casing connecting pipe (298) that connects the one-sided cross breakage prevention connecting body (256) and the noise reduction casing (241) so that some of the noise reduction material flowing through the one-sided cross breakage prevention connecting body (256) is guided by the guide curved body (296) and flows toward the rear one-sided slanted body and then sprayed toward the upper part of the interior of the noise reduction casing (241). Includes.

The above piston (246), the flow generating rotation shaft (291), and the flow accelerator (295) are connected integrally and rotate together.

The above casing pillar connecting member (294) is formed in a tapered shape that gradually narrows from the inside of the noise reduction casing (241) toward the inside of the rear one-side pillar (254), so that the noise reduction material that flows from the inside of the noise reduction casing (241) through the casing pillar connecting member (294) can be sprayed more quickly into the inside of the rear one-side pillar (254).

The above-mentioned fluid accelerator (295) is formed sharply in a tapered shape so as to face the tapered inner surface of the casing column connecting body (294), and the outer surface of the above-mentioned fluid accelerator (295) is formed in a shape in which screw blades are wound multiple times, so that the noise reduction material flowing through the above-mentioned casing column connecting body (294) can be accelerated according to the rotation of the above-mentioned fluid accelerator (295).

The above acceleration through hole (297) is formed in a form that gradually narrows from the inlet side of the casing column connecting body (294) toward the outlet side of the surface of the flow-inducing curved body (293), and the outlet of the acceleration through hole (297) is formed on the surface of the flow-inducing curved body (293) so that the noise reduction material flowing through the acceleration through hole (297) is sprayed along the surface of the flow-inducing curved body (293), so that some of the noise reduction material flowing through the casing column connecting body (294) flows through the acceleration through hole (297) and is then sprayed toward the surface of the flow-inducing curved body (293), and accordingly, some of the noise reduction material flowing along the surface of the flow-inducing curved body (293) according to the rotation of the flow-generating rotary vane (292) is accelerated by the noise reduction material sprayed through the acceleration through hole (297), thereby reducing the noise. Since it can be refluxed in the forward direction of the casing (241), the mixing of the noise reduction material inside the noise reduction casing (241) can be more smoothly achieved.

The above cross casing connecting pipes (298) can be formed in multiple numbers spaced apart from each other.

In each of the above cross casing connecting pipes (298), the outlet portion connected to the noise reduction casing (241) in each of the above cross casing connecting pipes (298) is formed in the forward direction of the noise reduction casing (241) compared to the inlet portion connected to the one-sided cross breakage prevention connector (256), so that each of the above cross casing connecting pipes (298) is formed in a form inclined in the forward direction of the noise reduction casing (241), so that when the noise reduction material flowing through the one-sided cross breakage prevention connector (256) flows through each of the above cross casing connecting pipes (298) and is then sprayed into the upper space inside the noise reduction casing (241), the noise reduction material can be sprayed in the forward direction inside the noise reduction casing (241), and accordingly, the mixed flow inside the noise reduction casing (241) can be formed more smoothly.

As described above, when the flow generation unit (290) is applied, the noise reduction material is mixed inside the noise reduction casing (241) so that the flow is generated, and the heat that may be generated by the operation of the hydraulic low-noise rock drilling unit (245) can be quickly spread throughout the noise reduction material inside the noise reduction casing (241), and some of the noise reduction material can be cooled by external air while flowing through the rear one-side pillar (254), the rear one-side inclination body, and the one-side cross breakage prevention connecting body (256), and thus the cooling efficiency of the hydraulic low-noise rock drilling unit (245) can be improved.

While the present invention has been illustrated and described above with respect to specific embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention as set forth in the claims below. However, it should be made clear that all such modifications and variations are within the scope of the present invention.

According to a drill bit according to one aspect of the present invention and a low-noise rock drill including the drill bit, a drill hole can be accurately formed in a drilling target body to a required size while reducing the size of hydraulic pressure for forming the drill hole, so that the industrial applicability thereof is high.

170 : Drill bit
171: Beat body
172 : Bit connector
173 : Bit sink hole

Claims (5)

delete delete A low-noise rock drill that uses hydraulic pressure to form a drilling hole of a certain depth in at least one of the rocks or ground existing at a construction site and requiring drilling.
A boom connecting member that connects to the boom of heavy equipment;
A drift support member connected to the above boom connecting member and formed in the shape of a long bar with a certain length;
a rod rotatably arranged on the drift support member; and
A drill bit connected to the front side of the above load and configured to perforate the perforation target to form the perforation hole;
The above drill bit has a bit connection part that is connected to the front side of the above load,
A bit body formed in the shape of a circular pillar with a certain outer diameter in the forward direction from the front side of the above bit connection part,
A bit recessed hole is formed with a diameter that is smaller by a certain size than the outer diameter of the bit body while having the same center as the center of the bit body, and is formed to a certain depth along the inside of the bit body.
When the bit body part is advanced to contact the perforation target and perforate the perforation target by the hydraulic pressure applied from the low-noise rock drill, a part of the perforation target corresponding to the inside of the perforation hole is inserted into the inside of the bit depression hole, and the bit body part forms a perforation hole intermediate body having a circular ring cross-section in the perforation target.
The above low noise drilling machine
It further includes a drilling pliers unit that is inserted into the drilling hole intermediate body from which the drill bit has been detached, and picks up and removes the circular column residue in the shape of a circular column inside the drilling hole intermediate body to the outside;
The above perforation forceps unit
A first perforation forceps inserted into one side of the above perforation hole intermediate body and capable of grasping one side of the above perforation hole intermediate body,
A first perforation extension body extending from the rear side of the first perforation forceps,
A second perforation forceps capable of picking up a portion of the perforation hole intermediate body that is symmetrical to the portion picked up by the first perforation forceps based on the center of the perforation hole intermediate body,
A second perforation extension body extending from the rear side of the second perforation forceps and intersecting with the first perforation extension body in an X shape,
A perforation forceps rotation axis that penetrates the intersection of the first perforation extension body and the second perforation extension body and rotatably connects the first perforation extension body and the second perforation extension body,
A low-noise rock drill characterized by including a forceps gap adjusting means installed between the first perforation extension body and the second perforation extension body so that the gap between the first perforation forceps and the second perforation forceps can be adjusted, and adjusting the gap between the first perforation extension body and the second perforation extension body. delete In the third paragraph,
The above low noise drilling machine
A noise reduction hydraulic unit including a unit base connected to the drift support member, a hydraulic low-noise drilling unit arranged on the unit base to rotate and advance the rod so that the drill bit can perforate the perforation target, and a noise reduction casing coupled to the unit base and arranged in a form that surrounds the hydraulic low-noise drilling unit; and
Further comprising a flow generating unit that generates flow in the noise reduction material inside the noise reduction casing;
The above noise reduction hydraulic unit
It includes a one-sided breakage prevention member arranged along the upper part of one of the two side surfaces of the noise reduction casing to protect the noise reduction casing from external impact.
The above one-sided breakage prevention member
A front side pillar erected on one side of the front part of the above noise reduction casing,
A front side slanted body formed in a form that extends from the upper part of the front side pillar but is inclined outwardly compared to the front side pillar so as to face the upper part of one of the two side portions of the noise reduction casing,
A rear side pillar erected on one side of the rear portion of the noise reduction casing so as to be symmetrical with the front side pillar with the noise reduction casing in between,
A rear side tilting member that extends from the upper part of the rear side pillar so as to be symmetrical with the front side tilting member with the noise reduction casing in between, but is formed in a shape that is tilted outward compared to the rear side pillar so as to face upward of one of the two side portions of the noise reduction casing;
It includes a one-side breakage prevention connecting member that is arranged along the upper part of one of the two side surfaces of the noise reduction casing to a certain length and whose front and rear sides are connected to the front one-side tilting body and the rear one-side tilting body.
The above fluid generating unit
A flow-generating rotational shaft extending from the piston of the above hydraulic low-noise rock drilling unit to the internal space of the noise reduction casing from a protruding portion at the rear of the above hydraulic low-noise rock drilling unit,
A flow-generating rotary blade that is connected to the above-mentioned flow-generating rotary shaft and rotates according to the rotation of the above-mentioned flow-generating rotary shaft to generate flow in the above-mentioned noise-reducing material inside the above-mentioned noise-reducing casing,
A flow-inducing curved body formed in a curved shape with a predetermined curvature so as to face the flow-generating rotary vane on the inner rear surface of the noise reduction casing, and which induces the noise reduction material flowing by the flow-generating rotary vane to come into contact and be guided in the inner front direction of the noise reduction casing;
A casing column connecting body formed at the center of the above flow-inducing curved body in contact with an imaginary line extending axially from the flow-generating rotational axis and connecting the inside of the noise reduction casing and the inside of the rear one-side column so that some of the noise reduction material flowed by the flow-generating rotary vane flows into the inside of the rear one-side column;
A flow accelerator that extends from the above-mentioned flow generating rotational axis and is inserted into the interior of the above-mentioned casing column connecting body and has screw wings formed on the outer surface thereof to accelerate the flow of the above-mentioned noise reduction material through the above-mentioned casing column connecting body;
A guide curved body formed in a curved shape with a predetermined curvature so that it protrudes from the inner surface of the rear one-side column so as to face the rear one-side column exit of the casing column communication body, and so that the noise reduction material flowing through the casing column communication body comes into contact with it and is guided toward the rear one-side inclined body;
An acceleration through hole formed across the casing column communicating body and the flow inducing curved body so that the surfaces of the casing column communicating body and the flow inducing curved body are in communication, and a portion of the noise reduction material flowing through the casing column communicating body is sprayed toward the surface of the flow inducing curved body;
A low-noise rock drill characterized by including a cross casing connecting pipe that connects the one-sided cross breakage prevention connecting body and the noise reduction casing, guides the noise reduction material by the guide curved body to flow toward the rear one-sided inclined body, and then allows some of the noise reduction material flowing through the one-sided cross breakage prevention connecting body to be sprayed toward the upper part of the interior of the noise reduction casing.