KR200287124Y1 - A hydraulic breaker for reducing noise - Google Patents

Abstract

The present invention relates to a noise reduction hydraulic breaker used in heavy equipment, the piston (2) which is moved up and down by hydraulic pressure is installed in the cylinder body (1), the lower body (1) of the piston (2) The chisel 4 is installed in the upper and lower reciprocating motion of the piston 2 to be transmitted to the chisel 4 to crush the object 5, while the chisel stop jaw formed in the cylinder body 1 The sound insulation ring 6 for tightly blocking the noise is inserted into 1a) so that the noise generated when the piston 2 descends and hits the chisel 4 is blocked by the sound insulation ring 6, The cylinder body (1) is to effectively reduce the noise transmitted to the outside.

Description

A hydraulic breaker for reducing noise

The present invention relates to a hydraulic breaker which is a work machine installed and used in heavy equipment, and more particularly, to a noise reduction hydraulic breaker which can reduce noise transmitted to the outside by embedding a sound insulation member in a cylinder. will be.

In general, the hydraulic breaker is a kind of work machine which is installed instead of the bucket on the arm of the excavator and is effectively used for work such as rock crushing, pile piling, etc. in civil engineering or building foundation work, and its structure is generally called a cylinder, as shown in FIG. A piston 102 is installed in the body 101 to vertically move up and down by hydraulic pressure, and the vertical reciprocating motion of the piston 102 is installed in the cylinder body 101 positioned below the piston 102. ) To break up the object 104.

However, due to the collision motion of the piston 102 and the chisel 104 in the hydraulic breaker as described above, a large noise is generated during operation, which limits the use in the city. Such noise is caused by the piston 102 having a high speed. As the noise generated when the kinetic energy is transmitted to the chisel 103 and the kinetic energy transmitted to the chisel 103 as work energy as the energy to break the crushed object 104, It can be distinguished, conventionally, various methods for improving the working environment by blocking the noise generated when the piston 102 and the chisel 103 collide with the outside has been devised.

4 shows a conventional hydraulic breaker for blocking the noise between the piston 102 and the chisel 103, wherein the chisel 103 is pushed up by the crushed object 104. The upper end of the chisel stop jaw 101a formed in the cylinder body 101 has a structure in which the sound absorbing member 106 is fitted with the bush 105 interposed therebetween, the chisel striking surface formed on the top of the chisel 103 ( The noise generated when 103a collides with the piston striking surface 102a formed at the lower end of the piston 102 is propagated in the direction of the arrow in the drawing to be absorbed by the sound absorbing member 106 so as to be diffused into the air. It is possible to reduce.

However, the conventional noise reduction hydraulic breaker made as described above has a problem that it is difficult to sufficiently absorb the noise generated from the striking surfaces 102a and 103a with the sound absorbing member 106 alone.

The present invention has been made to solve the problems described above, it is an object to provide a noise reduction hydraulic breaker that can effectively block the noise transmitted to the outside by installing a sound insulating member inside the cylinder. .

The present invention for achieving the above object, the piston is moved up and down reciprocating by the hydraulic pressure inside the cylinder body, the chisel is installed through the chisel pin on the lower body of the piston, the vertical reciprocating of the piston In the hydraulic breaker that the movement is transmitted to the chisel to crush the object to be broken, a sound isolation ring for tightly blocking the noise is inserted into the chisel stop jaw formed in the cylinder body, the chisel upper end is fitted Characterized in that it can slide.

Therefore, according to the noise reduction hydraulic breaker of the present invention made as described above, the noise generated when the piston is lowered and hit the chisel is blocked by the sound insulation ring, it is possible to effectively reduce the noise transmitted to the outside of the cylinder.

1 is a longitudinal sectional view of a noise reduction hydraulic breaker according to the present invention;

Figure 2a is a plan view separately showing the sound insulation ring constituting the present invention in Figure 1,

2b is a sectional view of FIG. 2a,

Figure 3a is a plan view showing a second embodiment of the sound insulation ring constituting the present invention as shown in Figure 2a.

Figure 3b is a cross-sectional view as shown in Figure 2b a third embodiment of the sound insulation ring constituting the present invention.

Figure 4 is a longitudinal cross-sectional view showing a noise reduction hydraulic breaker according to the prior art as shown in FIG.

Explanation of symbols on the main parts of the drawings

1: Cylinder Body 1a: Chisel Stop Jaw

2: piston 3: chisel pin

4: chisel 4a: chisel home

5: crushed material 6: sound insulation ring

7,8 ring 9: buffer member

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

Figure 1 is a longitudinal cross-sectional view of the noise reduction hydraulic breaker according to the present invention, Figure 2a and Figure 2b is a plan view and a cross-sectional view showing a separate sound insulation ring constituting the present invention in FIG.

As shown in the present invention, a piston (2) for moving up and down by hydraulic pressure is installed in a cylinder body (1) installed through a bracket on an arm of an excavator, and a cylinder located under the piston (2). The chisel 4 is installed in the body 1 via the chisel pin 3 so that the up and down reciprocating motion of the piston 2 is transmitted to the chisel 4 to crush the object 5.

Here, a chisel groove 4a is formed at the side of the chisel 4 so that the chisel pin 3 can be fitted to prevent the chisel 4 from being pulled out of the cylinder body 1 by its own weight.

In addition, the sound insulation ring 6 is formed in the cylinder body 1 and is tightly inserted into the chisel stop jaw 1a that restricts the upper and lower points of the chisel 4 so as to block the noise. An upper end of the chisel 4 is fitted to 6 so as to vertically reciprocate.

Here, the sound insulation ring 6 can be of various structures, as shown in Figure 3a, the buffer member 9 between two rings of different diameters, that is, the small diameter ring and the large diameter ring (7,8) When the composite structure is inserted, the buffer when the small diameter ring (7) moves up and down by contact friction between the outer peripheral surface of the chisel (4) and the inner peripheral surface of the sound insulation ring (6) when the chisel (4) moves up and down As the member 9 is elastically flowed together, the small-diameter ring 7 can flow with the chisel 4 to some extent, thereby reducing the amount of wear due to sliding friction between the chisel 4 and the small-diameter ring 7. do.

3A shows a second embodiment of the sound insulation ring 6, in which the small-diameter ring 7 of the sound insulation ring 6 is divided into a plurality of divided pieces, and the buffer member 9 is interposed between the divided pieces. When the structure is fitted, the degree of freedom of elastic flow is further increased, resulting in an improvement in abrasion reduction effect due to friction.

In addition, Figure 3b shows another third embodiment of the sound insulating ring (6), the inner diameter of the small diameter ring (7) is a tapered structure that increases as the down, it is possible to block the noise while the chisel ( 4) and the contact area between the small diameter ring (7) is reduced to further reduce the amount of wear due to contact.

According to the noise reduction hydraulic breaker of the present invention made as described above, the impact surface formed on the lower end of the piston (2) when lowering the piston (2) to transmit the impact force to the chisel (4) in order to crush the object to be shredded ( 2a) and the noise generated when the striking surface 4a formed on the top of the chisel 4 collide with each other may be blocked by the sound insulation ring 6 to prevent propagation to the outside of the cylinder body 1. .

As described above, according to the noise reduction hydraulic breaker according to the present invention, the noise generated when the piston descends and hits the chisel is blocked by the sound insulation ring, thereby effectively reducing the noise transmitted to the outside of the cylinder.

Claims (3)

A piston (2) for moving up and down by hydraulic pressure is installed in the cylinder body (1), and a chisel (4) is installed in the cylinder body (1) of the lower part of the piston (2), so that the piston (2) In a hydraulic breaker in which the up and down reciprocating motion is transmitted to the chisel 4 to crush the crushed object 5, A sound insulation ring 6 is inserted into the chisel stopper 1a formed in the cylinder body 1 to close the noise, and the chisel 4 is inserted into the sound insulation ring 6 so that the chisel 4 ), And the sound insulation ring (6) is a noise reduction hydraulic breaker, characterized in that the buffer member (9) is inserted between the small diameter ring and the large diameter ring (7,8) having a different diameter. The noise reduction hydraulic breaker according to claim 1, wherein the small diameter ring (7) is divided into a plurality of split pieces. The noise reduction hydraulic breaker according to claim 1, wherein the small diameter ring (7) is tapered with an inner diameter increasing downward.