KR200195924Y1 - Connector of an air hammer - Google Patents

Abstract

The present invention is formed in the connector of the pneumatic hammer that is continuously connected to the rear end of the pneumatic hammer to form a reinforcing welding portion to the connector for supplying the pneumatic pressure to increase the coupling strength and prevent damage by the torsional stress generated during rotation It is about. One end is connected to one end of the pipe 110 through the first welding part 190, and in use, the first connecting member 116 is screwed to the back head 16 fixed to the rear of the pneumatic hammer, and the second welding part In the connector of the pneumatic hammer according to the present invention having a second connector 216 coupled to the other end of the pipe 110 through 290, the pipe 110 and the first and second connectors 116 and 216. The first and second reinforcing welds 192 and 292 are further formed at the coupling portions of the φ).

Description

Connector of pneumatic hammer {CONNECTOR OF AN AIR HAMMER}

The present invention relates to a pneumatic hammer, and more particularly, to form a reinforcing welding portion in the connector that is continuously coupled to the rear end of the pneumatic hammer to supply the pneumatic pressure to increase the coupling strength and to prevent damage by torsional stress generated during rotation It relates to a connector of a pneumatic hammer having a structure that can be.

In the field of civil engineering, which drills tunnels for the construction of various roads, or drills ground for the development of earth anchors and underground resources, the rock layers are often met. Therefore, in order to proceed with the operation, the rock layer should be removed, and for this purpose, a rock drill or an excavator is usually used. In the case of drilling and crushing rock using these equipment, the pneumatic hammer shown in FIG. 1 is used.

1 is a cross-sectional view showing the configuration of a general pneumatic hammer, Figure 2 is a cross-sectional view showing the configuration of a connector according to the prior art.

In the overall configuration of the pneumatic hammer, the sleeve 10 into which the compressed air flows in through the inlet hole 16a of the back head 16 fitted to the rear end, and a check valve to prevent backflow of ground water when the supply of compressed air is stopped. And a valve chest 70 having a plurality of circumferential grooves 74 through which compressed air passes on an outer circumferential surface thereof, having a valve guide portion 72 on which the check valve 80 is slidably mounted in the longitudinal direction. And the valve seat 50 into which the circumferential direction is formed with a plurality of circumferential holes 54 in the circumferential direction and a valve seat 50 fitted to the outer circumferential surface of the rear end, and the compression flowed in along the outer circumferential surface of the valve seat 50. By air A piston 30 mounted to slide in the longitudinal direction along the inner wall of the sleeve 10, an inner cylinder 40 in which the rear end 33 of the piston 30 is slidably mounted, and a piston ( A bit 20 striking by 30) and striking the rock layer by a plurality of projections 22 in front of it while repeatedly moving along the longitudinal direction, and the sleeve 10 to be able to move the bit 20 in the longitudinal direction. It consists of a chuck 12 coupled to the front end of the.

On the rear outer circumferential surface of the back head 16 coupled to the rear end of the sleeve 10, a threaded portion 16a is formed for engagement of the pneumatic hose, and the back head 16 is assembled via the O-ring 84 during assembly. It is hermetically screwed to the rear end of the sleeve 10. In addition, the material of the sleeve need not be particularly limited, but a material such as a barrel having excellent durability and strength may be used, or a material of equivalent strength may be used. In the present specification, the rear refers to a side into which compressed air is introduced, and the front refers to a side from which compressed air is discharged. The rear end 80b of the check valve 80 to selectively block the inflow of compressed air has a structure capable of closing the check end 16c of the back head 16, and a spring (80) at the front end 80a. 82) is fitted.

An O-ring 88 is fitted at the rear end of the valve seat 50 to maintain the airtightness with the valve chest 70, and an O-ring 86 is fitted to the outer circumferential surface for airtightness with the inner cylinder 40. Inside the piston 30, a through hole 34 through which compressed air introduced along the outer circumferential surface of the valve seat 50 strikes the piston 30 and passes therethrough. The rear of the through hole 34 is guided to slide along the longitudinal direction while being inserted into the piston guide portion 52 formed at the front end of the valve seat 50. Similarly, the front of the through hole 34 is guided to slide along the longitudinal direction while being inserted into the piston guide portion 28 formed at the rear end of the bit 20.

The rear outer peripheral surface 33 of the piston 30 slides along the inner wall of the inner cylinder 40, while the outer peripheral surface 36 of the intermediate point slides along the inner wall of the sleeve 10, and the front end 32 ) Directly price the price end 26 of the bit 20. A plurality of through holes 42 are formed at the front end of the inner cylinder 40 into which the rear outer circumferential surface 30 of the piston 30 is inserted. The rear outer circumferential surface of the bit 20 is moved along the longitudinal direction while being supported by the bit ring 14.

When rock work is performed using the pneumatic hammer having such a configuration, since the drilling depth is usually very deep, in order to supply the pneumatic pressure stably to the pneumatic hammer, a plurality of connecting connectors as shown in FIG. 2 are used. That is, in the drawing, the right end is composed of a first connector 116 for screwing the connecting connector 100 to the back head 16 of the pneumatic hammer. In the drawing, the left end is used to connect another connector. It is composed of a second connector 216 for. What is necessary is just to connect and use as many connectors 100 as necessary, and in the case of the connector arranged in the best position, the 2nd connector 216 is connected to a compressor via a pneumatic hose.

Among them, a female screw 116a is formed on the inner circumferential surface of the first connector 116 and screwed to the male thread 16a of the back head 16, and another connector is formed on the outer circumferential surface of the second connector 216. A male screw 216a to which the pneumatic hose is screwed is formed. These first connecting bodies 116 and second connecting bodies 216 are welded to both ends of the connecting pipe 110.

In the pneumatic hammer connector having such a structure, a state in which the first connecting member 116 is inserted into the pipe 110 in a conventional method for fixing the first connecting member 116 to the connecting pipe 110. In the above, by welding the V-shaped grooves formed at these engaging portions, a method of forming the first welding portion 190 and assembling it firmly is adopted. Similarly, in order to fix the second connecting body 216, first, by welding the V-shaped grooves formed at their coupling portions while the second connecting body 216 is fitted inside the pipe 110, 2 to form a welded portion 290 is firmly assembled. The air flowing into the inner hole 216b of the second connector 216 along the arrow direction P from the pneumatic compressor passes through the pipe 110 and follows the first connector 116 along the arrow direction P '. It is supplied to the pneumatic hammer through the inner hole (116b) of the.

The connector of the pneumatic hammer having such a configuration connects the first and second connectors to both ends of the connecting pipe through the first welding portion and the second welding portion. There is a problem that it is damaged and cannot function as a connector.

The present invention devised to solve such a problem is to form a first reinforcing welding portion and a second reinforcing welding portion when the first connecting member and the second connecting member and the pipe additionally to increase the welding strength The purpose is to provide a connector.

1 is a cross-sectional view showing the configuration of a general pneumatic hammer

Figure 2 is a cross-sectional view showing the configuration of a connector according to the prior art

3 is a cross-sectional view showing the configuration of the connector according to the present invention

♣ Explanation of symbols for main part of drawing ♣

10: Sleeve 12: Chuck

14: Beat ring 16: Back head

20: bit 22: protrusion

26 ': price section 28, 52: piston guide section

30: piston 40: inner cylinder

50: valve seat 54: cylinder hole

60: Valve 70: Valve chest

72: valve guide portion 74: circumferential groove

80: check valve 82: spring

100: connector 110: connection pipe

190, 290: weld 192, 292: reinforced weld

The connector of the pneumatic hammer according to the present invention for achieving the above object, one end is coupled to one end of the pipe through the first welding portion, the first connector is screwed to the back head fixed to the rear of the pneumatic hammer in use And a connector of the pneumatic hammer having a second connecting member coupled to the other end of the pipe through a second welding portion, wherein the coupling portions of the pipe and the first and second connecting bodies are respectively provided with a first and a second connector. Reinforcing welding is characterized in that it is further formed.

Hereinafter, with reference to the accompanying Figure 3 will be described in detail with respect to the bits of the pneumatic hammer according to a preferred embodiment of the present invention, the same parts as the conventional structure described in Figures 1 and 2 are denoted by the same reference numerals.

3 is a cross-sectional view showing a connector of a pneumatic hammer according to the present invention.

First, as described in FIG. 2, when the overall configuration of the connector used to connect to the pneumatic hammer is used, the pipe 110 having a predetermined length and one end of the pipe 110 are connected to each other through the first welding part 190. A second coupling coupled to one end and a second coupling coupled to the other end of the pipe 110 through a first connecting member 116 connected to the back head 16 fixed to the rear of the pneumatic hammer and a second welding portion 290. It consists of a connecting body (216).

In the connector 100 of the pneumatic hammer having such a configuration, in order to increase the coupling strength between the first and second connectors 116, 216 and the connecting pipe 110, in a preferred embodiment of the present invention In addition to the first and second welding portions 190 and 290, first and second reinforcing welding portions 192 and 292 may be connected to the coupling portions of the pipe 110 and the first and second connecting bodies 116 and 216, respectively. ) Was further formed.

Therefore, at the time of assembling, while the first connector 116 is inserted into the pipe 110, the V-shaped grooves formed at the coupling portions thereof are welded to form the first welded portion 190. By forming the first reinforcing welding portion 192 through additional welding, it is firmly assembled to the pipe 110. Similarly, in order to fix the second connecting body 216, first, by welding the V-shaped grooves formed at their coupling portions while the second connecting body 216 is fitted inside the pipe 110, At the same time as forming the second welding portion 290, the second reinforcement welding portion 292 is formed through additional welding to be firmly assembled to the pipe (110).

Next, FIG. 3 is a lateral cross-sectional view for illustrating the second reinforcing welding portion 292. Although not shown, the first reinforcing welding portion 192 has the same structure. As shown, a plurality of welding holes 294 are formed in the second connecting body 216 and the pipe 110 to provide the second reinforcing welding part 292, and the welding is performed. The second reinforcing welding portion 292 may be further formed by welding the hole 294. The first reinforcement weld 192 may also be formed in the same manner.

According to the present invention described above, since the pipe constituting the body of the connector and the first and second connectors connected to both ends of the pipe are joined by the welding portion and the reinforcing welding portion of the present invention, the impact and torsion transmitted during operation By having a strength that can withstand stress sufficiently, there is an advantage of extending the life.

Claims (1)

One end is connected to one end of the pipe 110 through the first welding part 190, and in use, the first connecting member 116 is screwed to the back head 16 fixed to the rear of the pneumatic hammer, and the second welding part In the connector of the pneumatic hammer having a second connector 216 is coupled to the other end of the pipe 110 through 290, The connector of the pneumatic hammer, characterized in that the first and second reinforcing welding portion (192, 292) is further formed on the coupling portion of the pipe (110) and the first and second connectors (116, 216), respectively.