KR20090063659A

KR20090063659A - Hydraulic breaker with sound-absorbing mechanism

Info

Publication number: KR20090063659A
Application number: KR1020070131109A
Authority: KR
Inventors: 강대식
Original assignee: 강대식
Priority date: 2007-12-14
Filing date: 2007-12-14
Publication date: 2009-06-18

Abstract

A hydraulic breaker with the sound absorption structure is provided to reduce the weight of a tool while providing the good sound absorption effect. A hydraulic breaker with the sound absorption structure comprises: a cylinder(10) connecting on an upper part of a back head(102) including a gas charge unit of hollow shape in the inside; a piston(20) mounted in the cylinder inside; and a crushing part(30) uniting on the lower part of the piston. A hollow part(40) filled with the gas type filler is located on the inner top of the piston. A sound-absorbing layer(50) coated with the soundproofing material is included inside the back head. The gas type filler is the air or the nitrogen and the sound-absorbing layer is made of the urethane material. The hydraulic breaker having the sound absorption structure smashes objects with the crushing part by repeated elevating action of the piston according to the inflow or outflow of the fluid.

Description

Hydraulic Breaker with Sound Absorbing Mechanism

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic breaker, and more particularly, to a hydraulic breaker that provides an economical sound absorbing structure while effectively absorbing noise generated when a piston strikes a tool, thereby dramatically reducing noise.

In general, the hydraulic breaker is widely used for crushing concrete or rock by mounting on construction machinery such as excavators and loaders, and crushing mounted at the end while the piston 20 in the cylinder 10 is vertically repeated by hydraulic pressure. The crushing unit 30 is a device configured to crush the concrete or rock by hitting the crushing unit 30, such as a chisel component.

That is, the crushing force of the crushing part is the change of the hydraulic pressure generated in the process of the fluid flowing in and out of the fluid by the strong pressure into the cylinder 10 of the hydraulic breaker through the fluid supply unit 101 and the back head 102 when the piston rises As the piston rises and falls repeatedly as the gas pressure in the gas filling unit 103 increases, the lower end of the piston 20 hits the upper end of the crushing unit 30.

When the hydraulic breaker works, the noise generated when the tool crushes the crushed object and the noise generated when the piston strikes the tool causes excessive noise. ) Filling sound absorbing materials such as mouth, tin, urethane, and mixed rubber in the front head 104 where the impact point is located, or inserting such sound absorbing materials into the piston to absorb noise generated when the piston hits the crushing part. Various methods have been tried.

However, the conventional sound-absorbing structure should be equipped with expensive sound absorbing material, leading to cost increase, reducing the work efficiency by weighting the weight of the tool, and if the moisture or the like penetrates according to the working or storage environment, Not only was the life shortened, but the structural replacement of the sound absorbing material was not easy.

The present invention was created to solve the above-mentioned problems with the sound absorbing structure of the conventional hydraulic breaker, while providing the same or more sound absorbing effects as the conventional one, and to provide a sound absorbing structure that can be implemented at a light weight and can be easily replaced. do.

In order to achieve the above object, the present invention includes a cylinder having a back head having a hollow gas filling part therein coupled to the upper portion, a piston mounted inside the cylinder, and a crushing portion coupled to the lower portion of the piston. In a hydraulic breaker in which the shortest fractured part breaks an object by the repeated action of raising and lowering the piston according to the inflow and outflow, the piston forms a hollow part in the upper part and a gaseous filler in the hollow part. Provided is a hydraulic breaker having a sound absorbing structure, characterized in that the filling is configured.

According to another feature of the invention, the back head having a hollow gas filling portion therein is provided with a cylinder coupled to the upper portion, a piston mounted inside the cylinder and a crushing portion coupled to the lower piston, inflow of hydraulic pressure and In a hydraulic breaker in which the shortest fractured part breaks an object by the repeated action of raising and lowering the piston according to the outflow, the piston has a hollow portion formed inward from an outer end, and the hollow portion is filled with a gaseous filler. The external connection of the hollow portion provides a hydraulic breaker having a sound absorbing structure, characterized in that it is configured to be closed by the shielding means.

According to another feature of the invention, one side of the shielding means provides a hydraulic breaker having a sound absorbing structure, characterized in that the injection means for injecting and replacing the gas-type filler is further provided.

According to another feature of the invention, the interior of the back head is coated with a sound insulating material to provide a hydraulic breaker, characterized in that provided with a double sound absorbing structure with the hollow portion of the piston.

According to the present invention, since the hollow portion of the piston is filled with the gaseous filler, the weight of the tool is reduced, the cost is reduced, and the gaseous filler can be easily replaced while providing the same sound absorption effect.

In addition, it is possible to provide a double sound absorbing structure through the urethane soundproofing material inside the back head has the advantage that can significantly improve the sound absorbing effect.

Figure 2 is a cross-sectional view of an embodiment of a hydraulic breaker according to the present invention, Figure 3 is an enlarged view of only the sound absorbing structure for understanding.

Since the present invention is characterized by the sound absorbing structure of the hydraulic breaker, the sound absorbing structure according to the present invention can be applied to any type of hydraulic breaker having a piston and a back head.

Therefore, in the following description, the description of the components and the working relationship of the hydraulic breaker itself will be omitted, and the same reference numerals as in FIG.

Noise generated when striking the tool during the upward or downward action of the piston due to the change in hydraulic pressure is released to the outside via the piston itself.

Therefore, it is the starting point of the technical idea of the present invention that the noise caused by the striking of the piston can be absorbed more effectively by the piston itself rather than the front head or the external element.

To this end, the hollow portion 40 is formed inside the piston 20 so that vibrations and noises transmitted during crushing are dissipated through the hollow portion 40.

Applicants have found through research and experiment that the same sound-absorption effect can be achieved even with a gaseous filler including air without filling a separate solid or liquid sound-absorbing material in the hollow part, which is a function of the weight and cost of the tool. There is a remarkable effect of saving and providing durability and ease of management.

The hollow part may be located anywhere in the upper and lower parts as long as it does not affect the piston operation, but most preferably, the hollow part is formed on the upper side as large as possible to improve the sound absorbing effect.

As shown in the figure, a hollow portion 40 formed inside the upper portion of the piston from the upper end of the piston is shown, and the connection path 401 connected to the outside is sealed by shielding means 402 such as a stopper.

Since the hollow part is an empty space formed inside the piston, the hollow part may be provided at all when the piston is manufactured, and thus the hollow part may be formed in an integrated sealed structure without a separate connection to the outside. It may be impossible.

The hollow part is filled with a gaseous filler such as air or nitrogen. In order to facilitate post-injection and replacement of gas, the shielding means 402 further includes an injection means 403 as a gas inlet. It must be constructed.

If the injection means 403 is located at the upper end of the piston, as shown in the drawing, only the back head can be dismantled to inject and replace the gas filler so that a further improved gaseous filler is developed in the present invention. It is possible to secure flexibility for technical use.

According to the present invention, the inside of the back head 102 can be coated with a sound absorbing material to enhance the sound absorbing effect. The vibration and noise reduced by the hollow part are caused by the sound absorbing material layer 50 inside the back head 102. Minimization of the noise absorbed to the outside and emitted to the outside can be achieved.

The sound absorbing material layer 50 inside the back head may utilize a soundproofing material made of urethane, and in forming the sound absorbing material layer, it is important to compress the film completely and uniformly against the inner surface of the back head in terms of sound absorbing effect and durability.

Therefore, as a specific method of forming the sound absorbing material layer 50, (1) the homogenization of the inner surface of the back head and (2) the soundproofing material which is injection molded according to the shape of the inner space of the back head and coated with the adhesive is applied to the inside of the back head. And adsorbing by applying heat.

In addition, any method of firmly bonding the sound absorbing material in the back head may be introduced into the sound absorbing material layer forming according to the present invention.

1 is an exemplary view of a conventional hydraulic breaker.

2 is an exemplary view of a hydraulic breaker employing a sound absorbing structure according to the present invention.

Figure 3 is a detailed view of the sound absorbing structure according to the present invention.

10: cylinder 102: backhead

20: piston 30: crushing portion

40: hollow part 401: connection path

402: shielding means 403: injection means

50: sound absorbing material layer

Claims

A cylinder having a hollow gas filling part therein has a cylinder coupled to the upper portion, a piston mounted inside the cylinder, and a crushing portion coupled to the lower portion of the piston, thereby raising and lowering the piston due to the inflow and outflow of hydraulic pressure. The hydraulic breaker in which the fracture part of the shortest part crushes the object by a repetitive action of the piston, wherein the piston has a sound absorbing structure, characterized in that the hollow portion is formed inside the upper portion and the gaseous filler is filled inside the hollow portion. One hydraulic breaker.

A cylinder having a hollow gas filling part therein has a cylinder coupled to the upper portion, a piston mounted inside the cylinder, and a crushing portion coupled to the lower portion of the piston, thereby raising and lowering the piston due to the inflow and outflow of hydraulic pressure. In the hydraulic breaker wherein the shortest part of the crushing part crushes the object by a repetitive action of the piston, the piston has a hollow portion formed from the outer end to the inner side, the hollow portion is filled with a gas-type filler, the external connection path of the hollow portion is shielded Hydraulic breaker having a sound absorbing structure, characterized in that configured to be closed by means.

3. The hydraulic breaker having a sound absorbing structure according to claim 2, wherein an injection means for injecting and replacing the gaseous filler is further provided on one side of the shielding means.

The hydraulic breaker having a sound absorbing structure according to claim 1 or 2, wherein the inside of the back head further includes a soundproof material layer coated with a soundproof material.

3. The hydraulic breaker having a sound absorbing structure according to claim 1 or 2, wherein the gas-type filler is air or nitrogen.

5. The hydraulic breaker with sound absorption structure according to claim 4, wherein the sound insulation layer is made of urethane material.