KR200439968Y1 - Low-noise type hydraulic breaker - Google Patents

Abstract

A low noise hydraulic breaker is disclosed that can minimize the blow noise generated when the piston strikes the chisel of the fracture part. The piston reciprocates up and down by hydraulic pressure inside the hydraulic cylinder. The body portion is coupled to the lower portion of the hydraulic cylinder. The crushing unit is coupled to the key to crush the crushed object in the blasting chamber formed inside the body part and is supported by the upper bush and the lower bush to crush the crushed object with the chisel. The chisel is formed with a sound absorbing protrusion having a step. The sound absorbing material is installed between the lower bush and the sound absorbing protrusion to absorb vibrations and shocks due to the impact and to suppress the ringing of the hydraulic cylinder to reduce noise. With this configuration, the sound absorbing material is installed between the lower bush and the chisel of the hydraulic breaker used in the construction site, minimizing the blow noise generated between the piston and the chisel during the crushing work to solve the complaints caused by the noise pollution. In addition, construction can be done both day and night, which can shorten the construction period. When the lower bush is worn by the friction with the chisel, only the lower bush can be used to reduce the cost of parts replacement.

Breakers, cylinders, pistons, sound absorbers, blow noise

Description

LOW-NOISE TYPE HYDRAULIC BREAKER}

1 is a partial cutaway perspective view of a low-noise hydraulic breaker according to a preferred embodiment of the present invention;

2 is a schematic cross-sectional view of a low noise hydraulic breaker according to the present invention;

Figure 3 is a schematic cross-sectional view of the piston hit the chisel of the low-noise hydraulic breaker according to the present invention; And

Figure 4 is a cross-sectional view showing a hydraulic breaker according to the prior art.

<Description of the code | symbol about the principal part of drawing>

100: hydraulic breaker 110: hydraulic cylinder

111: piston 120: fracture part

122: chisel 124: sound absorption protrusion

125: step 130: body

140: hitting unit 141: hitting room

150: upper bush 160: lower bush

180: sound absorbing material 182: fitting hole

184: stepped hole

The present invention relates to a low-noise hydraulic breaker, and more particularly, to a low-noise hydraulic breaker that absorbs the blow noise generated when the piston hits the chisel when breaking a building or digging a road to improve noise reduction efficiency. .

Generally, hydraulic breaker is widely used in the crushing of concrete or rock by mounting on construction equipment such as excavator, loader, etc. Strike the piston while moving up and down to crush concrete and rock by the impact force.

This breaker consists of a hydraulically actuated cylinder and a piston, with a rod attached to the front of the cylinder to break the object. When the piston is reciprocated by the operation of the cylinder, the rod is hit and a strong impact is applied to the object, which causes the object to split or break.

However, experience shows that while the breaker is in operation, the pistons hit the rods and the noise generated when the object is destroyed and the noise generated.

In particular, when a building is crushed or a road is crushed in the downtown area, the noise is severely generated at the time of hitting, which has been a subject of complaint in the construction site.

Recently, a low noise type breaker has been developed to reduce the occurrence of noise of the breaker.

Figure 4 is a schematic cross-sectional view showing a hydraulic breaker according to the prior art.

As shown in FIG. 4, the breaker 10 includes a hydraulic cylinder 20 which is formed such that the piston 21 reciprocates up and down and forms an exterior, and a body portion 40 which is coupled to the lower portion of the hydraulic cylinder 20. And, it is coupled to the key 80 to crush the object in the striking chamber 51 of the striking portion 50 formed in the body portion 40 is supported on the upper bush 60 and the lower bush 70 and A crushing unit 30 for crushing the crushed object with the chisel 32 and an impact chamber 51 which is an empty space for hitting the chisel 32 of the crushing unit 30 with the piston 21 of the hydraulic cylinder 20 are formed. It consists of one striking part 50.

A gas chamber 23 is provided at an upper end of the hydraulic cylinder 20 in contact with the upper end of the piston 21, and a valve 25 is formed at one side of the outer circumferential surface of the hydraulic cylinder 20, and the hydraulic pressure is lowered adjacent to the valve 25. An accumulator 27 is formed for temporarily storing oil and using it as a kinetic energy source.

The sound insulation inserting hole 71 is formed in the inner circumferential surface of the lower bush 70, and the sound insulation insert 90 is inserted into the sound insulation inserting hole 71 to exhibit the effect of preventing the inflow of foreign matter and noise from the outside.

The breaker 10 according to the related art configured as described above is installed on the soundproofing agent 90 installed on the inner circumferential surface of the lower bush 70 supporting the chisel 32 to prevent noise generated from the chisel 32 by the impact of the piston 21. Minimize and prevent foreign substances from entering the outside.

However, in the conventional breaker 10, when the piston 21 reciprocates up and down and the chisel 32 strikes the concrete, the lower bush 70 is worn by the chisel 32. When 70 is worn out, the soundproofing agent 90 installed on the inner circumferential surface of the lower bush 70 does not accurately cover the lower bush 70, and thus the blow sound generated by the piston 21 hitting the chisel 32 is air. There was a problem that is propagated through and radiated to the outside.

In addition, when the worn lower bush 70 needs to be replaced at the same time, the sound absorbent 90 inserted into the inner circumferential surface of the lower bush 70 has to be replaced at a high price.

The present invention is devised to solve the problems of the prior art as described above, the technical problem of the present invention is to absorb the noise generated when the piston hits the chisel when crushing a building or digging a road, noise reduction efficiency It is to provide a low-noise hydraulic breaker that can increase the.

In order to achieve the above object, the present invention,

A piston is formed to reciprocate up and down, and the outer cylinder is coupled with a key to crush the to-be-crushed object in the hydraulic cylinder that forms the exterior, the body portion coupled to the lower portion of the hydraulic cylinder, and the striking portion formed inside the body portion. A hydraulic breaker comprising a crushing part supported by a bush and crushing a crushed object with a chisel, and a crushing part having a blow chamber which is an empty space for hitting the chisel of the crushing part with a piston,

A sound absorption protrusion having a step is formed on one side of the outer peripheral surface of the chisel,

Between the sound absorbing protrusion and the lower bush provides a low-noise hydraulic breaker, characterized in that the sound absorbing material is installed to absorb the vibration and the impact of the impact.

Preferred embodiments of the present invention having the features as described above will be described in detail with reference to the accompanying drawings.

1 is a partial cutaway perspective view of a low noise hydraulic breaker according to a preferred embodiment of the present invention, Figure 2 is a schematic cross-sectional view of a low noise hydraulic breaker according to the present invention.

As shown in FIGS. 1 and 2, the hydraulic breaker 100 includes a hydraulic cylinder 110, which is formed such that the piston 111 reciprocates up and down, and forms an exterior thereof, and a body part coupled to a lower portion of the hydraulic cylinder 110. 130 and the key 170 to crush the object in the impact chamber 141 of the hitting portion 140 formed inside the body portion 130 to the upper bush 150 and the lower bush 160 A crushing unit 120 that is supported and crushes the crushed object with the chisel 122, and an impact chamber 141 which is an empty space that strikes the chisel 122 of the crushing unit 120 by the piston 111 of the hydraulic cylinder 110. It consists of a hitting portion 140 formed.

Further, a gas chamber 113 is provided at an upper end of the hydraulic cylinder 110 in contact with the upper end of the piston 111, and a valve 115 is formed at one side of the outer circumferential surface of the hydraulic cylinder 110, and a lower side adjacent to the valve 115 is provided. The accumulator 117 for temporarily storing the hydraulic oil to use as a kinetic energy source is formed.

A sound absorbing protrusion 124 having a step 125 is formed on one side of the outer circumferential surface of the chisel 122, that is, the outer side of the lower bush 160 in the direction of hitting the concrete.

Between the sound absorbing protrusion 124 and the lower bush 160, a sound absorbing material 180 for absorbing vibration and shock due to the strike is provided.

Sound absorbing material 180 has a circular shape is fitted with a fitting hole 182 is coupled to the chisel 122, and one side of the fitting hole 182 is stepped coupling hole 184 is joined to the stepped 125 Is formed.

And the sound absorbing material 180 is composed of a viton containing a urethane, mixed rubber and fluorine resin.

Referring to the operation of the present invention configured as described above as follows.

First, the hydraulic breaker 100 is mounted on a construction machine such as an excavator or a loader, and the accumulator 117 is operated by operating the valve 115 in a state where the chisel 122 of the crushing unit 120 is positioned on the crushed object. Repeated supply and discharge of gas to the gas chamber 113 while preventing the pulsation in the piston 111 is hitting the upper portion of the chisel 122 in the impact chamber 141 of the impact portion 140 formed at the bottom while reciprocating up and down To break up the crushed object (see FIG. 3).

Here, a hitting noise is generated when hitting the upper end of the chisel 122 by the vertical reciprocating motion of the piston 111, the hitting noise is a sound absorbing material provided between the lower bush 160 and the sound absorbing protrusion 124 of the chisel 122 Absorbed and buffered by the 180, the impact noise is not emitted to the outside. In addition, since the resonance phenomenon is removed by the sound absorbing material 180, it is possible to prevent the transmission of vibration and noise.

In addition, even when the inner peripheral surface of the lower bush 160 is worn out due to the friction between the chisel 122 and the lower bush 160 during a long time use, the sound absorbing material 180 is the lower bush 160 and the sound absorbing protrusion ( It is tightly coupled between the 124 and can block the blow noise emitted to the outside.

On the other hand, the present invention, the lower bush 160 and the sound absorbing material 180 is formed separately so that when the lower bush 160 is worn out and wants to replace, only the lower bush 160 without replacing the lower bush and the sound insulation at the same time as in the prior art Can be used interchangeably to reduce the cost of parts replacement.

Although the breaker is described as being operated hydraulically in the present invention, it can be applied to a breaker operated by pneumatic pressure.

According to the low noise type hydraulic breaker according to the present invention as described in detail above, by installing a sound absorbing material between the lower bush and the chisel of the hydraulic breaker used in the construction site to minimize the blow noise generated between the piston and the chisel during the crushing operation Complaints due to noise pollution can be resolved, and construction can be done both day and night, which can shorten the construction period.

And since the resonance phenomenon is removed by the sound absorbing material it can prevent the transmission of vibration and noise.

In addition, when the lower bush wear due to friction with the chisel can be used to replace only the lower bush can reduce the cost of parts replacement.

In the above described with reference to a preferred embodiment of the present invention, the present invention is not limited to the above-described embodiment, those skilled in the art is the subject matter of the present invention described in the utility model registration claims below It will be readily understood that various modifications may be made without departing from the scope thereof.

Claims (4)

delete The piston 111 is formed to reciprocate up and down, forming a hydraulic cylinder 110, the body portion 130 is coupled to the lower portion of the hydraulic cylinder 110, and formed inside the body portion 130 Crushing unit coupled to the key 170 to crush the object to be crushed in the impact chamber 141 of the striking unit 140 is supported by the upper bush 150 and the lower bush 160 and crushed the crushed object with a chisel 122 In the hydraulic breaker 100 including a blower 140 formed of a blow chamber 141 which is an empty space for hitting the chisel 122 of the crushing unit 120 with the piston 111 , A sound absorbing protrusion 124 having a step 125 is formed at one side of the outer circumferential surface of the chisel 122. A sound absorbing material 180 is installed between the sound absorbing protrusion 124 and the lower bush 160 to absorb vibrations and impacts due to the impact, and the sound absorbing material 180 is circularly coupled to the chisel 122 inside. The fitting hole 182 is formed, the low noise type hydraulic breaker, characterized in that the stepped coupling hole 184 is formed on the side of the fitting hole (184) is formed on one side of the step (125). The low noise type hydraulic breaker of claim 2, wherein the sound absorbing material (180) is urethane. The low noise type hydraulic breaker of claim 2, wherein the sound absorbing material is made of Viton.

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