KR101987704B1 - Nut loosening prevention device of hammer for digging - Google Patents

Abstract

The present invention relates to a nut loosening prevention device of a hammer for excavation wherein a stable coupling state between an air tank part, a hammer case part, and a bit head part constituting a hammer for excavation is continuously maintained. The nut loosening prevention device of the hammer for excavation comprises: a base plate which has a fastening hole formed therein and is mounted in a state in which a bolt penetrates each of both sides thereof; a pair of rotating members mounted on the base plate, and accommodated in a fastening direction of the nut having a polygonal shape fastened to the bolt and fixed to the fastened state of the received nut; and a pressing plate disposed on top of the pair of rotating members and blocking the rotation of the rotating member while pressing the rotating member by a fixing bolt coupled to the fastening hole.

Description

TECHNICAL FIELD [0001] The present invention relates to a nut loosening prevention device for hammer for digging,

[0001] The present invention relates to an apparatus for preventing the unthreading of a hammer for excavation, and more particularly to an apparatus for preventing the unthreading of a hammer for excavation, To a nut tightening prevention device.

Generally, when constructing excavation for construction work or building foundation work, first drill the excavation hole in the ground, then fill the concrete hole with the steel pipe or steel frame in the excavation hole and construct the column buried in the ground.

In such a construction, it is necessary to drill the depth of the excavation hole as deep as possible or to expand the diameter of the excavation hole in order to sufficiently resist the load of the building and prevent settlement of the ground.

An excavating hammer (drilling hammer) for constructing a drilling hole receives compressed air from a ground excavator to drive a piston provided therein, and thereby, a plurality of hammer bits provided at the tip are driven Soil and rock layers.

This excavation hammer includes an air tank portion provided with a screw for discharging the earth excavated on the outer circumferential surface, which is usually supplied with compressed air, a hammer case portion and a hammer case portion connected to the air tank portion and having a plurality of pistons installed therein And a bit head unit including a plurality of hammer bits.

A technique having the above structure is disclosed in Japanese Patent No. 4628413 in a rotary excavator equipped with a hammer for underground excavation.

However, the underground excavation hammer of Japanese Patent No. 4628413 has a problem in coupling between the air tank portion, the hammer case portion (excavation portion) and the bit head portion.

In other words, since the air tank portion, the hammer case portion, and the bit head portion are fastened through the bolts and the nuts, even if the fastening force is strong, the vibration of the hammer for excavation is so strong that the fastening force for long- There is a problem that the replacement cycle of the hammer for excavation is accelerated.

Further, as the coupling force between the air tank portion, the hammer case portion and the bit head portion is lowered, there is a serious problem that the excavation construction is interrupted.

Japanese Patent No. 4628413 Korean Patent No. 10-1536674

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and technical prejudice, and it is an object of the present invention to provide a hammering hammer, And it is an object of the present invention to provide an apparatus for preventing the unthreading of a hammer for a digging hammer.

In order to accomplish the above object, according to the present invention, there is provided an apparatus for preventing unhooking of a hammer for a digging hammer, comprising: a base plate having a fastening hole, A pair of pivoting members that are seated on the base plate and accommodate and fix the fastened state of the nuts accommodated in the fastening direction of the nuts having the polygonal shape fastened to the bolts; And a pressing plate disposed on the pair of pivoting members for blocking rotation of the pivoting member while pressing the pivoting member by a fixing bolt coupled to the fastening hole.

At this time, the pivoting member includes: a receiver having a rotation fixing portion, in which a nut is received inward, and a plurality of corner receiving cores in which the corners of the nut are positioned along the fastening direction of the nut are formed perpendicularly along the radial direction; And a plate-shaped extension extending from the receiver, the plate-shaped extension having a through slot through which the fixing bolt passes, the plate being curved radially about the receiver.

Preferably, the pair of pivotal member extension pieces are overlapped with each other such that the fixing bolts communicate with the through slots so as to penetrate the through slots.

On the other hand, the pressing plate includes a plate-shaped pressing piece which is seated on the upper surface of the rotating member and has a second through-hole through which the fixing bolt penetrates, and a pressing piece which is bent in a downward direction from one side of the pressing piece, And a stopper which is disposed in the stopper member and blocks the rotation of the tiltable member.

Finally, it is preferable to further include an unlocking piece for preventing the unfastening of the fixing bolt by contacting the head portion of the fixing bolt by being bent upward in the upward direction after the fixing bolt having the polygonal head is combined with the head.

According to the apparatus for preventing the unthreading of the hammer of the present invention having the above-described structure, the coupling between the air tank portion, the hammer case portion and the bit head portion of the hammer for excavation is achieved by fastening the bolt and the nut It also has an excellent effect of blocking the loosening of the bolts and nuts at the same time for strong impacts or vibrations occurring during construction.

In addition, since the bolts and nuts are prevented from being loosened, the joint state between the parts is stabilized so that it is possible to perform precise excavation construction, and additionally, the damage of the equipment is prevented, thereby reducing the financial loss due to the maintenance.

FIG. 1 is a photograph showing a nut fastening preventing device of a hammer for excavation according to the present invention,
Fig. 2 is a perspective view of the main part showing the nut loosening preventing device of Fig. 1,
Fig. 3 is an exploded perspective view of Fig. 2,
FIG. 4 is a view showing a process of the coupling block of FIG. 3,
Fig. 5 is a sectional view of the main part of Fig. 2,
FIG. 6 and FIG. 7 are reference views showing the rotation state of the nut in the structure of the nut unclamping preventing device of the hammer for excavation according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

2 is a perspective view showing a nut loosening prevention device of FIG. 1, FIG. 3 is an exploded perspective view of FIG. 2, FIG. 4 is an exploded perspective view of the hammer of the hammer of FIG. FIG. 5 is a sectional view of the main part of FIG. 2, and FIGS. 6 and 7 are reference views showing the rotation state of the nut in the structure of the nut unclamping preventing device of the hammer for excavation according to the present invention .

As shown in FIGS. 1 to 7, the nut detaching device 80 of the present invention includes a base plate 40 having a fastening hole 41 and seated on both sides of the bolt B, respectively. And a pair of pivoting members which are seated on the base plate 40 and accommodate the nuts N having a polygonal shape fastened to the bolts B and fix the fastened state of the housed nuts N, (50); And the rotation member 50 is disposed on the pair of pivoting members 50 and blocks the rotation of the pivoting member 50 while pressing the pivoting member 50 by the fixing bolts 71 engaged with the pivoting holes 41 And a pressure plate (60).

Although the nut detaching device 80 of the present invention is described as being installed in the hammer 100 for excavation in the present embodiment, if the structure is such that the application position is not limited and fastening is performed through the bolts B and the nuts N And may be installed at various positions to prevent loosening of the nut (N).

1, the excavation hammer 100 includes a cylindrical air tank portion 10 provided with a screw to which compressed air is supplied from the outside and excavated on the outer circumferential surface thereof, And a bit head unit 30 connected to the lower side of the hammering case unit 20 and having a plurality of hammer bits (not shown). The hammer case unit 20 includes a plurality of pistons.

At this time, the air tank unit 10, the hammer case unit 20, the hammer case unit 20, and the bit head unit 30 are fastened through the nut tightening prevention unit 80 of the present invention.

Although the nut detaching device 80 is shown on the upper side and the lower side of the excavation hammer 100 in the drawing, it may be installed either on the upper side or the lower side depending on the structure of the excavation hammer 100 would.

In the following description, the nut detaching device 80 of the present invention is applied to the hammer case 20 and the bit head 30.

A plurality of installation spaces S recessed inwardly are formed in the hammering case part 20 in the radial direction so that the nut unwinding device 80 can be installed as shown in FIG. The base plate 40 is seated.

As shown in FIG. 3, the base plate 40 has a flat surface with a top surface and a bottom surface in a predetermined length and thickness, and a fastening hole 41 in which a fixing bolt 71 And two bolts B which are exposed to the installation space S pass through the hammer case portion 20 while being fastened to the bit head portion 30 at both sides of the fastening hole 41 A first through hole 40a is formed.

That is, the base plate 40 is seated on the bottom surface of the installation space S with the two exposed bolts B passing through the first through holes 40a.

2 to 5, a pair of tiltable members 50 having a corresponding structure are seated on the upper surface of the base plate 40, and penetrate through the base plate 40, (A hexagon in the figure) engaged with the bolt B to fix the fastened state of the received nut N.

The pivoting member (50) is constituted by a receiver (51) and an extending piece (55).

The receptacle 51 receives a nut N which is fastened to the bolt B inwardly in a cylindrical shape having a predetermined height.

A rotation fixing part 53 having a diameter for receiving the nut N is formed in the inside of the receiving part 51. The rotation fixing part 53 is provided with a nut N corresponding to the fastening direction of the nut N. And a plurality of corner receiving corrugations 54 at which the respective corners are located are formed perpendicularly along the radial direction.

4, the corner receiving groove 54 has a depth at which only a part of the edge of the nut N is accommodated, and the angle of the corner formed by the polygonal shape (pentagon, hexagon, octagon) And a plurality of rotors are provided along the rotation fixing portion 53 so as to match the positions.

The reason for forming the plurality of corner receiving corrugations 54 in the rotation fixing portion 53 is that the edge of the nut N is not received in each corner even if the direction of the corner of the nut N fastened to the bolt B is any direction. So that the fastened state of the nut N can be fixed through the tiltable member 50 (see FIGS. 6 and 7).

Although the rotation fixing part 53 is shown as being formed through the receiver 51 in the present embodiment, the structure is not limited because it can be formed in a cap shape.

The extension piece 55 extends from the receptor 51 and has a plate-like shape having an upper surface and a lower surface in a flat shape. Inside the plate surface, through which the fixing bolt 71 described later passes as shown in Figs. 3 and 4, A slot 56 is formed.

At this time, it is preferable that the through slots 56 are formed to be curved in the radial direction about the receptors 51. Since the directions of the corners due to the completion of the fastening of the nuts N may be different, So that interference with the fixing bolt 71 passing through the through slot 56 is prevented (see FIG. 7).

In addition, the extension pieces 55 of the pair of pivoting members 50 are disposed so as to be superimposed so that the fastened state of the nuts N respectively coupled to the two bolts B can be fixed at the same time, as shown in FIG.

The fixing bolts 71 are screwed into the through slots 56 for engagement with the fastening holes 41 of the base plate 40 as the through slots 56 of the elongated pieces 55 communicate with each other, So as to form a connection passage.

The extension piece 55 of the receiver 51 is formed on the upper side of the receiver 51 and the extension piece 55 of the other receiver 51 is formed on the upper side of the receiver 51 so that the pair of extension pieces 55 can be overlapped. It is preferably formed on the lower side of the receptor 51.

The pair of pivoting members 50 having the above configuration are configured to accommodate the nuts N in the inside regardless of the direction of the edges of the nuts N fastened to the bolts B, Thereby preventing the nut N from being loosened, thereby fixing the fastened state.

2 to 5, the pressing plate 60 is disposed on the upper surface of the extension piece 55 of the pivoting member 50 in the form of a plate having a predetermined width and is fixed to the fixing bolt 71 to block the rotation of the pivoting member 50 while pressing the upper surface of the extending piece 55 of the pivoting member 50. [

3 and 4, the pressing plate 60 is accurately positioned on the upper side of the pivoting member 50 containing the fastened nut N, that is, on the upper side of the overlapping extended piece 55, 60 to push down the pivoting member 50 in the downward direction by the fastening force of the fixing bolt 71 fastened to the fastening hole 41.

To this end, the presser plate 60 includes a plate-like presser piece 61 formed on the upper surface of the elongated piece 55 of the tiltable member 50 and having a second through-hole 61a through which the fixing bolt 71 passes, And a stopper 63 disposed on one side of the pivoting member 50 in a state of being bent downward from one side (left side in the drawing) of the compression piece 61 to block rotation of the pivoting member 50.

2, the stopper 63 is disposed on one side of the overlapped extension piece 55 when the pressing plate 60 is fixed to the upper side of the extension piece 55 by the fixing bolt 71, And the rotation of the tiltable member (50) due to the impact is blocked in advance.

4, a fixing bolt 71 having a polygonal head is coupled to the other side (right side in the drawing) of the compression piece 61, and then the upper side of the fixing bolt 71 is bent upward, (One-dot chain line) may be further formed.

The release preventing piece 65 is kept in contact with the head surface of the fixing bolt 71 in the folded state to thereby control the rotation of the fixing bolt 71 due to vibration and impact to prevent the fixing bolt 71 from being released .

Hereinafter, a process of installing the nut releasing preventing device 80 will be described with reference to the accompanying drawings.

First, as shown in FIG. 3, the two bolts B are fastened so that one side of the bit head 30 is exposed upward and the other side of the bit head 30 is fastened.

Thereafter, the base plate 40 is seated while the bolts B are passed through the first through-hole 40a of the base plate 40.

After mounting the base plate 40, the nut N is fastened to the bolt B passing through the first through hole 40a.

At this time, since the amount of rotation of the nut (N) fastened to each bolt (B) is made by mechanical coupling, there is a slight difference according to the fastening degree of the operator or the fastening depth of the nut (N).

That is, the positions of the edges of the fastened nuts N on the left and right sides in the drawing can not be maintained at the same positions.

In this state, a pair of pivoting members 50 are sequentially seated on the upper surface of the mounted base plate 40. In this process, the nuts N (N) are fixed to the rotation fixing portions 53 of the respective pivoting members 50, Is accommodated.

Each of the corners of the nut (N) is accommodated in each of the corner receiving corrugations (54) formed in the rotation fixing portion (53) when the nut (N)

As shown in the drawing, the pair of pivoting members 50 are arranged such that the right pivoting member 50 is first seated, then the left pivoting member 50 is seated, and the pivoting members 50 And the through slots 56 of the extending pieces 55 are in communication with each other.

On the other hand, when the amount of tightening of the nut N fastened to the two bolts B is the same, the pair of pivoting members 50 maintains the same direction as the pair of pivoting members 50 The fastening plate 60 and the fixing bolt 71 may be fastened together.

7, when the amount of fastening rotation of one of the two nuts N is different, the rotation fixing portion 53 of the pivoting member 50 is aligned with the direction of each corner of the rotated nut N The fastening plate 60 and the fastening bolt 71 may be fastened together.

Since the pair of pivoting members 50 accommodate the nuts N irrespective of the amount of rotation of the nuts N, an operator does not necessarily have to make an effort to align the positions of the edges of the nuts N. [

When the pivoting member (50) is fully seated, the pressing plate (60) is seated on the upper surface of the overlapping extended piece (55).

The stopper 63 of the pressing plate 60 is in contact with the second through hole 61a of the pressing plate 60 and the stopper 63 of the pressing plate 60 Is located on one side of the member (50).

Thereafter, the fixing bolt 71 is passed through the second through hole 61a and the through slot 56, and is engaged with the fastening hole 41 of the base plate 40.

The pressing piece 61 of the pressing plate 60 presses the pair of pivoting members 50 while being pressed by the fixing bolts 71 so that the pivoting member 50 accommodating the nut N is eventually pressed, The fastening state of the nut N is fixed.

When the fastening of the fastening bolt 71 is completed, as shown in Fig. 4, the right side of the compression piece 61 in the drawing is bent in the one-dot chain line direction to form a release preventing piece 65 that comes into contact with the head surface of the fastening bolt 71 The release of the fastening bolt 71 is prevented, thereby completing the installation of the nut fastening preventing device 80.

The nut releasing device 80 is installed in a plurality of installation spaces S in the same manner.

As described above, the apparatus for preventing the unthreading of the hammer for excavation according to the present invention is such that the coupling between the air tank portion, the hammer case portion and the bit head portion of the excavation hammer is achieved by fastening bolts and nuts as in the prior art And at the same time, there is an excellent effect of blocking the loosening of the bolt and the nut at the same time even in the case of a strong shock or vibration generated at the time of construction.

In addition, since the bolts and nuts are prevented from being loosened, the joint state between the parts is stabilized so that it is possible to perform precise excavation construction, and additionally, the damage of the equipment is prevented, thereby reducing the financial loss due to the maintenance.

Although the present invention has been described with reference to the preferred embodiments and the accompanying drawings, it is needless to say that the technical scope of the invention is not limited thereto .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. There is no doubt that it is within.

10: Air tank part 20: Hammer case part
30: bit head part 40: base plate
40a: first through hole 41: fastening hole
50: rotating member 51: receptor
53: rotation fixing portion 54: corner receiving groove
55: extension piece 56: through slot
60: pressure plate 61:
61a: second through hole 63: stopper
65: Release prevention piece 71: Fixing bolt
80: nut unwinding device 100: hammer for digging
B: Bolt N: Nut
S: Installation Space

Claims (5)

A nut fastening preventing device (80) for an excavating hammer comprising an air tank part (10), a hammer case part (20) and a bit head part (30)
A base plate 40 formed with a fastening hole 41 and seated on both sides of the bolt B in a penetrating manner;
And a pair of pivoting members which are seated on the base plate 40 and accommodate the nuts N having a polygonal shape fastened to the bolts B and fix the fastened state of the housed nuts N, (50); And
The pressing member 50 is disposed on the pair of pivoting members 50 and presses the pivoting member 50 by the fixing bolts 71 engaged with the fixing holes 41, And a plate (60).
The method according to claim 1,
The tiltable member (50)
And a plurality of corner receiving corrugations 54 in which the corners of the nuts N corresponding to the fastening direction of the nuts N are accommodated, 53); And
And a plate-like extension piece (55) extending from the receptor (51) and having a through slot (56) through which the fixing bolt (71) penetrates is formed in a radially curved shape about the receptor (51) Wherein the hammer is provided with a nut.
3. The method of claim 2,
The extending piece 55 of the pair of pivoting members 50 is overlapped so that the fixing bolt 71 can communicate with the through slots 56 so that the fixing bolts 71 can pass through the through slots 56 A device for preventing loosening of a nut of a drilling hammer.
The method according to claim 1,
The pressing plate (60)
A plate-like pressing piece 61 which is seated on the upper surface of the tiltable member 50 and has a second through hole 61a through which the fixing bolt 71 passes, And a stopper (63) disposed on one side of the tiltable member (50) in a state in which the tiltable member (50) is in contact with the tiltable member (50) to block rotation of the tiltable member (50).
5. The method of claim 4,
A fixing bolt 71 having a polygonal head is coupled to the other side of the pressing piece 61 and then bent upward to be brought into contact with the head surface of the fixing bolt 71 to thereby prevent the fixing bolt 71 from being loosened, (65) is further provided on the outer periphery of the hammer.

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