KR20090052134A - Hydraulic breaker of low noise type - Google Patents

Abstract

The present invention relates to a low-noise hydraulic breaker. More specifically, the compressed air deteriorated by the high temperature compressed at high pressure during the downward movement of the piston and the impact noise generated when the piston hits the chisel are primarily reduced and reduced within the cylinder. The present invention relates to a low-noise hydraulic breaker that minimizes the impact noise by splitting and discharging the impact noise through a plurality of holes at the same time, and maximizes the efficiency by circulating the air inside the breaker and the air outside the breaker to cool the breaker. In bar, the present invention is provided with a gas chamber in the upper portion of the housing in which the cylinder is formed therein, the cylinder is installed in the upper and lower pistons, the front head is attached to the lower portion of the housing and the chisel is installed in the interior of the cylinder chamber Piece having the same shape as the inside In the breaker for hitting the chisel while compressing the hitting chamber by the lowering, the hitting chamber is formed in a spherical shape, the packing means is installed in contact with the chisel at the end where the chisel is retracted, the penetration of the bolt is installed to join the housing It is characterized by the fact that a plurality of through-holes are formed in communication with the space to suck the outside air and discharge the inside air.

Description

HYDRAULIC BREAKER OF LOW NOISE TYPE}

The present invention relates to a low-noise hydraulic breaker. More specifically, the compressed air deteriorated by the high temperature compressed at high pressure during the downward movement of the piston and the impact noise generated when the piston hits the chisel are primarily reduced and reduced within the cylinder. The present invention relates to a low-noise hydraulic breaker that maximizes efficiency by circulating air inside the breaker and air outside the breaker to minimize the size of the impact noise by dividing and discharging the impact noise through a plurality of through holes at the same time. .

In general, the hydraulic breaker is a kind of work machine which is installed on the arm of an excavator instead of a bucket, and is used for rock crushing, pile piling, etc. in civil engineering or building foundation work, and a piston that vertically reciprocates in the main body of the striking device. At the bottom of the piston is a structure in which a holder for holding a pile to install a chisel or a pile for crushing rock is installed.

The piston repeats the up and down reciprocating motion by the hydraulic pressure supplied to the striking device, and particularly, when descending, the piston descends rapidly by the force of hydraulic pressure or compressed gas, and strongly strikes the pile holder for drilling a chisel or pile for rock fracture. Done.

In response to such a hit, a reaction force against hydraulic pressure or compressed gas supplied to lower the piston strongly acts on the main body of the striking device, and vibration of the main body of the striking device is caused by a strong impact of the piston. That is, while the piston is accelerated up and down by the hydraulic or compressed gas force in the main body of the striking device and reciprocating, it strongly strikes the chisel or the pile holder at the bottom dead center when descending. There is a large impact pressure due to the recoil of the piston.

The fluctuations in the pressure of the hydraulic pressure or the gas inside the striking device main body cause vibration of the striking device main body, and the vibration of the striking device main body causes vibration of the bracket supporting the striking device, causing severe noise.

Thus, Korean Utility Model Registration No. 432315 has been proposed, but the low noise type hydraulic breaker of Utility Model Registration No. 432315 has a soundproof sheet attached to the inner surface of the case and the inner surface of the cover covering one side opening of the case. It is a structure to reduce the noise generated when attaching the chisel to the outside of the case.

The conventional low-noise hydraulic breaker can absorb some of the impact sound by the soundproof sheet, but it does not reduce the noise fundamentally and also does not release the heat generated inside the breaker to the outside so that the gas filled in the breaker is thermally expanded and lowered. This influenced the movement of the piston and caused the breaker efficiency to decrease.

Thus, as shown in FIG. 1, a gas chamber 120 is provided at an upper portion of a housing 100 in which a cylinder is formed therein, and a piston 200 that moves up and down is installed at a cylinder 110, and a lower portion of the housing 100 is provided. The front head 130 is attached and the piston 200 is applied to the inside of the front head 130 while applying the structure to absorb and shield the noise of the utility model registration No. 432315 outside the breaker formed by the chisel 300 is installed. When rising, the ball 410 pressurizes the spring 420 by the pressure difference, and opens the air inlet hole 430 as much as the air escaped between the front head 130 and the chisel 300 to allow the outside air to enter the air. When the piston 200 is lowered and the ball 200 is lowered, the valve 400 is installed to close the air inlet hole 430 to cool the high temperature heat generated inside the breaker.

However, the above-described breaker of the conventional structure compresses the striking chamber during the downward movement of the piston. At this time, the compressed air compressed at high pressure and the impact noise generated when the piston strikes the chisel simultaneously discharge the impact sound between the chisel and the front head. there is a problem.

Another problem is that when the breaker moves up and down the piston, the internal temperature of the breaker rises due to frictional heat, and heat is transferred to the gas filled in the gas chamber to increase the coefficient of thermal expansion of the gas. As it affects the rise of, the moving distance of the piston is shortened, which causes the efficiency of crushing to fall.

As described above, in order to prevent the efficiency deterioration due to the temperature rise inside the breaker, the operator removes the gas charged in the gas chamber, so that the gas is lost. This also affects the descending speed when the piston descends, thereby reducing the efficiency of crushing. Caused it.

The present invention has been made in view of the above-described conventional problems, and its object is to reduce primarily the noise noise generated when the piston hits the chisel and compressed air degraded by high temperature when the piston moves downward. Provides a breaker that minimizes the size of impact noise by dividing and reducing the impact noise through multiple through holes at the same time and maximizes the efficiency of crushing by circulating the air inside the breaker and the air outside the breaker to cool the breaker. It is.

An object of the present invention described above is provided with a gas chamber in the upper portion of the housing in which the cylinder is formed therein, the cylinder is provided with a piston moving up and down, the front head is attached to the lower portion of the housing and the chisel is installed inside the front head of the cylinder In a breaker in which a piston having the same shape as the inside of the seal descends and strikes the chisel while compressing the striking chamber, the striking chamber has a convex sphere shape and a packing means is installed at the end where the chisel is retracted. It is to provide a low-noise hydraulic breaker, characterized in that a plurality of through-holes for sucking the outside air and discharge the inside air is formed.

On the other hand, when the piston is raised, the outside air is sucked from the through hole, and when the piston is lowered, it is preferable to discharge the inside air from the through hole.

As described above, the present invention reduces the compressed air deteriorated by the high temperature compressed by the high pressure during the downward movement of the piston and the impact noise generated when the piston strikes the chisel in the cylinder, and reduces the impact noise through a plurality of through holes at the same time. Minimize the size of the impact noise by splitting and circulating the air inside the breaker and the air outside the breaker to cool the breaker to maximize the efficiency.

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

2 is a cross-sectional view showing a structure of a low noise hydraulic breaker 1 to which the technique of the present invention is applied. According to the present invention, the gas chamber 12 is formed on the upper portion of the housing 10 in which the cylinder 11 is formed. The piston 11 is provided in the cylinder 11 to move up and down, the front head 13 is attached to the lower portion of the housing 10 and the chisel 30 is installed inside the front head, While hitting the chisel 30 while the piston 20 descends and compresses the striking chamber 40 having the same shape as the shape, in which the striking chamber 40 has a spherical shape and an end into which the chisel 30 is retracted. The packing means 50 is installed in the tube and communicates with the through space 15 of the bolt 60 installed to couple the housing 10 to the suction and the inside of the outside air.

A plurality of through holes 18 for discharging air are formed.

Referring to the working state of the present invention having the structure as described above attached to the piston 20 when the upward movement as shown in Figure 3 the piston 20 is moved from the lower portion of the cylinder 11 to the upper portion, the piston When the air moves from the through space 15 to the impact chamber 40 by the volume of (11), the pressure is dropped in the through space 15 so that the outside cold air is sucked into the through hole 18.

At this time, the outside air sucked into the housing 10 is a high temperature in the cold outside air by the frictional heat generated by the vertical movement of the piston (20).

As described above, the piston 20 is lowered as shown in FIG. Compressing and hitting the chisel (30) at the same time is very severe impact noise occurs.

The impact noise generated in the striking chamber 40 tries to move downward by compression due to the lower movement of the piston 20, but the movement of the impact chamber 40 is moved by the packing means 50 which is in contact with the upper side of the chisel 30. As a result, the impact noise moves toward the through space 15 of the bolt 60, which is installed to couple the housing 10 together with the compressed air to the compressed air as a medium.

The high temperature air is moved toward the through space 15 while accompanied by impact noise, and at the same time, discharges the impact noise and high temperature air from the through hole 18 formed at the bottom of the housing 10. The hot air and the impact noise moved to the top of the through space 15 of 10) are discharged through the through holes 18 again.

When the piston 20 is raised, the outside air is sucked from the through hole 18, and when the piston is lowered, the inside air is discharged from the through hole 18. The impact noise generated in the impact chamber 40 is the housing 10. The shot noise is divided into a plurality of through holes 18 by being sequentially discharged while being delivered to the through space 15 of the through space 15 so that the impact noise is divided and discharged small.

1 is a cross-sectional view showing the structure of a conventional breaker.

Figure 2 is a cross-sectional view showing the structure of a low noise hydraulic breaker to which the technique of the present invention is applied.

Figure 3 is a cross-sectional view showing a state before hitting the low-noise hydraulic breaker of the present invention.

Figure 4 is a cross-sectional view showing a blow state of the present invention low noise hydraulic breaker.

※ Explanation of symbols about main part of drawing ※

1: Breaker 10: Housing

11 cylinder 12 gas chamber

13: front head 15: through space

18: through hole 20: piston

30: Chisel 40: Strike Room

50: packing means 60: bolt

Claims (3)

 A gas chamber is provided at an upper portion of the housing in which a cylinder is formed, and a piston is installed in the cylinder, and a piston is moved up and down. A front head is attached to a lower portion of the housing, and a chisel is installed inside the front head. In the breaker for hitting the chisel while the piston having a lower descending to compress the impact chamber, The percussion chamber is formed in a spherical shape and the packing means is installed in contact with the chisel at the end where the chisel is introduced and communicates with the through space of the bolt installed to couple the housing, so that the intake of external air and the internal air are discharged. Low noise hydraulic breaker, characterized in that formed a plurality. The low-noise hydraulic breaker of claim 1, wherein when the piston is raised, the outside air is sucked in the through hole, and when the piston is lowered, the inside air is discharged from the through hole. The low-noise hydraulic breaker of claim 1, wherein the blow noise generated in the blow chamber is transferred to an upper portion of the housing.

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