WO2017078311A1

WO2017078311A1 - Excavation bit

Info

Publication number: WO2017078311A1
Application number: PCT/KR2016/011952
Authority: WO
Inventors: 계진태
Original assignee: (주)씨엔피텍; 동림산업 주식회사
Priority date: 2015-11-02
Filing date: 2016-10-24
Publication date: 2017-05-11
Also published as: KR101705284B1

Abstract

The present invention relates to an excavation bit, and the excavation bit may comprise: a bit head part that has a pointed end excavation surface formed thereon, a plurality of stopper accommodating grooves having equal angles disposed on an outer circumference surface thereof, and a sliding shaft part formed in a rear end thereof; a wing bit that has a body that is formed long in a length direction, and shaft protrusions formed in both side surfaces thereof, wherein the shaft protrusions are inserted along guide grooves formed in the stopper accommodation grooves of the bit head part and installed to be foldable/unfoldable in the vicinity of the pointed end excavation surface of the bit head part; and an outer shell member that has a first stopper installed on one side thereof, being inserted deep into the stopper accommodation grooves and contacting the wing bit so that the wing bit can protrude outwardly from the bit head part while maintaining an unfolded state, and having a first length, and a second stopper installed on another side thereof, being inserted shallowly into the stopper accommodation grooves so as to form a space for the folded wing bit, and having a second length that is shorter than the first length.

Description

Drilling bits

The present invention relates to an excavation bit, and more particularly, to an excavation bit that enables drilling of narrow and wide holes as needed with a single bit without replacing the bit or equipment.

In general, the steel pipe grouting method is an underground excavation auxiliary method that improves the order while reinforcing the ground. The steel pipe is installed on the ground and the grout material is injected into the inside of the steel pipe. It is characterized by increasing the shear strength of soil and rock, and it is very advantageous in terms of constructability and economical efficiency because injection is performed in steel pipes.

The steel pipe grouting method is widely used as a part of the tunnel reinforcing method in recognition of its effect.

In general, the steel pipe grouting method includes the steps of drilling the ground, inserting a steel pipe provided with a strainer (groove injection part) in the drilled hole, inserting a sealing material between the steel pipe and the hole, and installing a packer. While the cement is made of.

However, this method has a problem in that it is difficult to insert the steel pipe due to the collapse of the drilling hole or the mixing of foreign matters in the soft soil ground in which the drilling hole is not naturally maintained because it proceeds by inserting the steel pipe after the drilling.

In order to solve the above problems, conventionally, as disclosed in the Republic of Korea Patent Publication No. 100919628, a technology has been developed that can facilitate the installation of steel pipes by using a foldable wing bit.

On the other hand, in the case of a solid ground depending on the shape of the ground during drilling, if a narrow ground hole with a narrow width, if necessary, such as a soft ground, a drilled through a wide width hole having a wide width and grouting in between Even if the tool is drilled, it may be necessary to drill in a different shape depending on the environment with narrow or wide holes as necessary.

However, the conventional drilling bit can be drilled with only one width. For example, in the case where the narrow hole is drilled with the narrow hole drilling bit and the wide hole is to be drilled into the wide hole, the drilling bit and the drilling bit may be used. After lifting all the connected equipment, there was a need to replace all the drilling bits or equipment, such as replacing the drill hole drilling bit.

An object of the present invention is to provide a drilling bit that can be drilled in various widths, as needed, as well as narrow width ball using a single drilling bit to improve the conventional problem. However, these problems are exemplary, and the scope of the present invention is not limited thereby.

Excavation bit according to the idea of the present invention for solving the above problems, the tip head is formed, the bit head portion is formed with a plurality of stopper receiving grooves in the outer diameter surface, the sliding shaft is formed at the rear end; The body is elongated and formed in the longitudinal direction, and both sides of the projections are formed, the projections are inserted along the guide grooves formed in the stopper receiving groove of the bit head portion is expanded and folded near the cutting edge of the bit head portion A wing bit possibly installed; And a shaft accommodating space for accommodating the sliding shaft portion of the bit head portion so as to be relatively axially moved forward and backward with respect to the bit head portion, and at a first angle and a second angle based on the rotation direction of the bit head portion. Axial rotation is possible, and when the shaft is rotated at the first angle with respect to the rotational direction of the bit head, and the first sliding forward, the wing bit protrudes outward to maintain the unfolded state A first stopper having a first length inserted deeply into the stopper receiving groove to contact the wing bit is installed at one side to drill the wide mouth, and retracts based on the bit head, and then the shaft at the second angle. After the rotation, when the secondary sliding advance, the wing bit is accommodated in the stopper receiving groove in the folded state to puncture the narrow hole And an outer cylinder member having a second stopper of a second length shorter than the first length, which is inserted into the stopper receiving groove on the other side so as to form a folding space of the wing bit.

In addition, according to the present invention, a locking pin is installed to be coupled to the neck portion of the sliding shaft portion through the through hole of the outer cylinder member so that the sliding shaft portion of the bit head portion is not separated from the outer cylinder member, the bit head portion A polygonal groove portion may be formed in the neck portion by a sliding length to enable forward and backward rotation and an angle of 90 degrees.

In addition, according to the present invention, the neck portion may be partially formed on the outer diameter surface of the sliding shaft portion so that the bit head portion can be rotated at an angle of 90 degrees.

Further, according to the present invention, the stopper receiving groove is formed in the outer diameter surface of the bit head portion in the axial direction, each of the first receiving groove, the second receiving groove, the third receiving groove and the fourth receiving is disposed at an angle of 90 degrees The guide groove may be formed to be long in the longitudinal direction from an inlet portion to an inner side surface of the first accommodation groove and the third accommodation groove positioned on the opposite side thereof, and may have a rounded end portion thereof.

According to the present invention, the wing bit has a rounded surface formed at a rear end thereof close to the shaft protrusion, and the first stopper has a first concave corresponding to the rounded surface so as to be in contact with the rounded surface at the front end. A surface is formed, and the second stopper may have a second concave surface corresponding to the distal end of the wing bit so as to accommodate the distal end of the wing bit.

According to some embodiments of the present invention made as described above, can be drilled in a wide range of widths, as well as narrow holes, as needed, without changing the bit or equipment to reduce work time and work costs to improve workability and productivity It has an effect that can be greatly improved. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view showing a drilling bit in accordance with some embodiments of the present invention.

FIG. 2 is an exploded perspective view of parts showing the drilling bit of FIG. 1. FIG.

3 is a rear perspective view showing the bit head portion of the drilling bit of FIG.

4 is a perspective view showing a wing bit of the drilling bit of FIG.

FIG. 5 is a perspective view illustrating an outer cylinder member of the drilling bit of FIG. 1. FIG.

6 is a perspective view illustrating a coupling state of a bit head part and a locking pin of the drilling bit of FIG. 1.

7 is a side view illustrating a wide hole drilling state of the drilling bit of FIG. 1.

FIG. 8 is a side view illustrating a narrow-hole punching state of the drilling bit of FIG. 1. FIG.

Hereinafter, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, and the following examples can be modified in various other forms, and the scope of the present invention is It is not limited to an Example. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In addition, the thickness or size of each layer in the drawings is exaggerated for convenience and clarity of description.

Throughout the specification, when referring to one component, such as a film, region or substrate, being positioned on, "connected", "stacked" or "coupled" to another component, said one configuration It may be interpreted that an element may be in direct contact with, or “coupled to”, “stacked” or “coupled” another component, or that there may be further components interposed therebetween. On the other hand, when one component is said to be located on another component "directly on", "directly connected", or "directly coupled", it is interpreted that there are no other components intervening therebetween. do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various members, parts, regions, layers, and / or parts, these members, parts, regions, layers, and / or parts are defined by these terms. It is obvious that not. These terms are only used to distinguish one member, part, region, layer or portion from another region, layer or portion. Thus, the first member, part, region, layer or portion, which will be discussed below, may refer to the second member, component, region, layer or portion without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "bottom" or "bottom" may be used herein to describe the relationship of certain elements to other elements as illustrated in the figures. It may be understood that relative terms are intended to include other directions of the device in addition to the direction depicted in the figures. For example, if the device is turned over in the figures, elements depicted as present on the face of the top of the other elements are oriented on the face of the bottom of the other elements. Thus, the exemplary term "top" may include both "bottom" and "top" directions depending on the particular direction of the figure. If the device faces in the other direction (rotated 90 degrees relative to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. Also, as used herein, "comprise" and / or "comprising" specifies the presence of the mentioned shapes, numbers, steps, actions, members, elements and / or groups of these. It is not intended to exclude the presence or the addition of one or more other shapes, numbers, acts, members, elements and / or groups.

Embodiments of the present invention will now be described with reference to the drawings, which schematically illustrate ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, embodiments of the inventive concept should not be construed as limited to the specific shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacturing.

1 is a perspective view showing a drilling bit 100 according to some embodiments of the present invention. 2 is an exploded perspective view of parts showing the excavation bit 100 of FIG. 1.

First, as shown in FIGS. 1 and 2, the drilling bit 100 according to some embodiments of the present invention includes a bit head 10, a wing bit 20, and an outer cylinder member 30. It may include.

For example, the bit head portion 10 has a tip drilling surface 11 is formed, a plurality of stopper receiving grooves (H1) (H2) (H3) (H4) is conformally disposed on the outer diameter surface, the sliding shaft portion ( 12) may be a kind of metal block formed.

More specifically, for example, although not shown, the tip drilling surface 11 may be provided with hemispherical cemented carbide tips to facilitate the excavation.

In addition, the bit head portion 10 may be formed, for example, a working fluid inlet hole or a working fluid discharge groove. Therefore, during drilling, a working fluid such as air or water is introduced into the working fluid inlet hole to reduce friction or impact, and the excavated foreign matters can be easily discharged to the outside along the working fluid discharge groove. The number or shape of the working fluid inlet hole or the working fluid discharge groove may vary.

3 is a rear perspective view illustrating the bit head portion 10 of the drilling bit 100 of FIG. 1.

As shown in FIG. 3, more specifically, for example, the stopper accommodation grooves H1, H2, H3, and H4 of the bit head portion 10 may have an outer diameter surface of the bit head portion 10. It may include a first receiving groove (H1), the second receiving groove (H2), the third receiving groove (H3) and the fourth receiving groove (H4) which is formed in the axial direction elongated, respectively is disposed at 90 degrees. .

In addition, the guide groove (G), the inlet portion on the inner surface of the first receiving groove (H1) and the third receiving groove (H3) located on the opposite side to guide the wing bit (20) It is formed long in the longitudinal direction from the Ga) and the end portion (Gb) can be rounded to facilitate the rotation of the wing bit 20 reached to the end portion (Gb).

4 is a perspective view showing the wing bit 20 of the drilling bit 100 of FIG.

As shown in FIG. 4, the wing bit 20 has a body 21 extending in the longitudinal direction, and a protrusion 22 is formed on both sides thereof, and the protrusion 22 is the bit head portion ( 10 are inserted along the guide grooves G formed in the stopper receiving grooves H1 and H3 of 10), and are provided to be unfolded and folded near the tip digging surface 11 of the bit head portion 10. It may be a wing-shaped metal block. Here, the number of the wing bits 20 is not limited to two, and at least one or three, four, five, six, etc. may be installed.

In addition, a wing bit excavation surface may be formed on the wing bit 20, and at least one cemented carbide tip may be installed on the wing bit excavation surface.

Therefore, the wing bit 20 can be unfolded from the bit head portion 10 when drilling the wide hole, and can be folded in the direction of the bit head portion 10 when drilling the narrow hole. have.

FIG. 5 is a perspective view illustrating the outer cylinder member 30 of the drilling bit 100 of FIG. 1.

As shown in FIG. 5, the outer cylinder member 30 accommodates the sliding shaft portion 12 of the bit head portion 10 so as to be axially moved back and forth relative to the bit head portion 10. A shaft portion accommodating space (A) is formed, and the shaft rotation is possible at a first angle and a second angle with respect to the bit head portion 10, and the shaft at a first angle with respect to the bit head portion 10 After the rotation, when the first sliding forward, the wing bit 20 protrudes in the outward direction of the bit head portion 10 to the stopper receiving groove (H1) (H3) on one side to maintain the unfolded state A first stopper 31 having a first length L1 inserted deeply and in contact with the wing bit 20 is installed, retracted based on the bit head portion 10, and then rotated at a second angle. After the second sliding forward, the wing bit 20 of the stopper receiving groove (H1) (H3) in the folded state A second shorter than the first length (L1) that is inserted into the stopper receiving groove (H1) (H3) on the other side to be accommodated therein to form a folding space (B) of the wing bit 20 It may be a generally cylindrical metal block on which the second stopper 32 of the length L2 is installed. Accordingly, the outer cylinder member 30 may be rotated forward and backward relative to the bit head portion 10.

FIG. 6 is a perspective view illustrating a coupling state of the bit head part 10 and the locking pin P of the drilling bit 100 of FIG. 1.

As shown in FIG. 6, the sliding shaft 12 of the bit head portion 10 passes through the through hole H of the outer cylinder member 30 so as not to be separated from the outer cylinder member 30. A locking pin P may be installed to engage the neck 13 of the shaft 12.

Therefore, when the bit head portion 10 is assembled to the outer cylinder member 30 and the locking pin P is fastened to the through hole H, the neck 13 is attached to the locking pin P. The engagement is not to be separated from the outer cylinder member 30, it can be rotated forward and backward at the same time.

More specifically, for example, as shown in Figs. 2 and 5, the slot head portion by the sliding length (L3) in the neck portion 13 so that the bit head portion 10 can be rotated forward and backward and 90 degrees 14 can be formed.

Here, the neck 13 may be partially formed on the outer diameter surface of the sliding shaft 12 so that the bit head 10 can be rotated at a 90 degree angle.

Therefore, the bit head portion 10 can be pivotally limited only within a constant angle, the first angle to the second angle, that is, within a 90 degree angle.

1 to 6, the wing bit 20 has a round surface 23 formed at a rear end thereof close to the shaft protrusion 22, and the first stopper 31 is A first concave surface F1 corresponding to the round surface 23 may be formed at a tip thereof so as to be in contact with the round surface 23.

Therefore, the first concave surface F1 of the first stopper 31 is in close contact with the rounded surface 23 of the wing bit 20 when the wing bit 20 is unfolded and fixed, so that the wing bit 20 is fixed. ), And the outer cylinder member 30 can support the wing bit 20 very firmly.

In addition, the second stopper 32 may have a second concave surface F2 corresponding to the distal end of the wing bit 20 to accommodate the distal end of the wing bit 20.

Therefore, when the wing bit 20 is folded, the wing bit 20 is inserted into the first receiving groove H1 and the third receiving groove H3 while facing the second stopper 32. It can be accommodated so as not to protrude.

FIG. 7 is a side view illustrating a wide hole drilling state of the drilling bit 100 of FIG. 1, and FIG. 8 is a side view illustrating a narrow hole drilling state of the drilling bit 100 of FIG. 1.

As illustrated in FIGS. 7 and 8, the operation process of the drilling bit 100 according to some embodiments of the present invention will be described. First, as illustrated in FIG. 7, the outer cylinder member 30 is After the shaft is rotated at a first angle with respect to the bit head portion 10 and the first sliding forward, the two first stoppers 31 having relatively long lengths are provided with the wing bits 20. Inserted into the first receiving groove (H1) and the third receiving groove (H3), respectively, in close contact with the two wing bits 20 can be firmly supported so that the wing bit 20 is no longer rotated backwards. have.

Therefore, when the bit head part 10 and the outer cylinder member 30 are rotated in the clockwise direction in the unfolded state of the wing bit 20, a wide hole having a wide width W1 may be drilled.

In this case, as shown in FIG. 7, the second stopper 32 having a relatively short length may include the second accommodation groove H2 and the fourth accommodation groove where the wing bits 20 are not installed. H4) may be temporarily inserted into the standby.

Subsequently, as shown in FIG. 8, when the outer cylinder member 30 retracts with respect to the bit head portion 10 and then rotates at a second angle, the second cylinder slides forward, the length is relatively long. Is formed when the two second stoppers 32 are formed into the first accommodating groove H1 and the third accommodating groove H3 in which the wing bits 20 are installed, respectively, the two wing bits 20 are formed. And loosened, the wing bit 20 can be naturally folded back.

At this time, the wing bit 20 is accommodated in the stopper receiving groove (H1) (H3) does not protrude to the outside. In addition, the first stopper 31 having a relatively long length is temporarily inserted into the second accommodating groove H2 and the fourth accommodating groove H4 where the wing bits 20 are not installed. Can be.

Therefore, when the bit head portion 10 and the outer cylinder member 30 are rotated clockwise again in the folded state of the wing bit 20, a narrow width hole having a narrow width W2 may be punctured.

For example, the operator drills the wide-hole while rotating the outer cylinder member 30 clockwise with the bit head portion 10, and then reverses the outer cylinder member 30, and then rotates the outer cylinder member 30. After rotating the lens 90 degrees counterclockwise, the first stopper 31 or the second stopper 32 may be selectively inserted into the first accommodating groove H1 and the third accommodating groove H3. In this way, narrow holes can be drilled if necessary.

Therefore, according to the present invention, it is possible to drill not only narrow holes, but also wide holes as wide as necessary, without changing bits and equipment, thereby reducing work time and work costs, thereby greatly improving workability and productivity.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

According to some embodiments of the present invention made as described above, as well as the narrow hole without changing the bit or equipment, can be drilled to various widths as needed, can greatly improve the workability and productivity, drilling work This saves you time and costs.

Claims

A bit head portion in which a tip excavation surface is formed, a plurality of stopper receiving grooves are conformally disposed on the outer diameter surface, and a sliding shaft portion is formed at a rear end thereof;

The body is elongated and formed in the longitudinal direction, and both sides of the projections are formed, the projections are inserted along the guide grooves formed in the stopper receiving groove of the bit head portion is expanded and folded near the cutting edge of the bit head portion A wing bit possibly installed; And

A shaft accommodating space for accommodating the sliding shaft portion of the bit head portion is formed so as to be axially moved forward and backward with respect to the bit head portion, and the shaft is formed at a first angle and a second angle based on the rotation direction of the bit head portion. Rotation is possible, and when the shaft is rotated at the first angle with respect to the rotational direction of the bit head part and then the first sliding forward, the wing bit protrudes in the outward direction of the bit head part to maintain its unfolded state. A first stopper having a first length inserted deeply into the stopper receiving groove to be in contact with the wing bit is installed at one side so as to be able to puncture a ball. After the second sliding forward, the wing bit is accommodated in the stopper accommodation groove in a folded state to drill a narrow hole. To lock the other side is inserted into the lower stopper receiving groove outer cylindrical member and a second stopper of the first and second length shorter than a length capable of forming a fold area of the wing bit installed;

Containing, drilling bit.
The method of claim 1,

A locking pin is installed to penetrate the through-hole of the outer cylinder member to engage the neck portion of the sliding shaft so that the sliding shaft portion of the bit head portion is not separated from the outer cylinder member.

Digging groove is formed in the neck portion by the sliding length in the neck so that the bit head portion can be rotated forward and backward and 90 degrees.
The method of claim 2,

And the neck portion is partially formed on an outer diameter surface of the sliding shaft portion such that the bit head portion can be rotated at a 90 degree angle.
The method of claim 1,

The stopper receiving groove is a first receiving groove, a second receiving groove, a third receiving groove and a fourth receiving groove which are formed axially long on the outer diameter surface of the bit head portion, and are respectively disposed at 90 degrees.

The guide groove is formed in the longitudinal direction from the inlet portion in the longitudinal direction on the inner surface of the first receiving groove and the third receiving groove which is located on the opposite side, the end is rounded bit.
The method of claim 1,

The wing bit, a round surface is formed at the rear end close to the shaft projection,

The first stopper has a first concave surface corresponding to the rounded surface to be in contact with the rounded surface at the front end,

And the second stopper has a second concave surface corresponding to the distal end of the wing bit so as to accommodate the distal end of the wing bit at the distal end.