KR20160103281A - Gas Chamber Structure for Breaker - Google Patents

Abstract

The present invention relates to a gas chamber structure for a breaker. According to the present invention, the breaker in which a gas chamber housing (700) where a gas chamber (710) is formed is coupled to a cylinder (600) comprises: a side expansion chamber (720) formed by being processed in one or more places at a side of the gas chamber (710); multiple gas chamber expansion through-holes (420) formed in the cylinder (600) and having one side toward the gas chamber housing (700) open and the other side closed; and a gas through-hole (730) formed in the gas chamber housing (700) for the side expansion chamber (720) to be in communication.

Description

A gas chamber structure of a breaker (Gas Chamber Structure for Breaker)

The present invention relates to a gas chamber structure of a breaker, in which a gas chamber housing (700) formed with a gas chamber (710) is coupled to a cylinder (600) A plurality of gas chamber extension holes 420 are formed in the cylinder 600 and the gas chamber housing 700 is opened in the opposite direction and the gas chamber extension holes 420 are closed in the opposite direction, A gas vent hole 730 formed in the gas chamber housing 700 such that the side expansion chamber 720 and the gas chamber expansion hole 420 are communicated with each other; And a gas chamber structure of the breaker.

Generally, a breaker (BREAKER) is a device that intermittently acts on a top surface of a piston due to hydraulic or pneumatic power, and a piston reciprocating up and down in a certain region strikes a head of a chisel, The tip of the chisel is made to crush the tip of the chisel in a state where the object to be crushed is in contact.

1, a compressible gas such as nitrogen gas is injected into the gas chamber 50 formed at the upper end of the piston 70 in the cylinder 10 to fill the cylinder 70. At the lower end of the piston 70, The head of the piston 30 is coaxially mounted so as to be in contact with the piston 70 and the pressure state of the fluid supplied in this state is switched by the control valve provided in the valve chamber VR, At this time, the expansion force of the nitrogen gas in the gas chamber 50 is converted into hammering energy that hits the head of the chisel 30 through the piston 70, so that the rock, And the like.

Examples of such breakers are well known, including those disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 10-0078639 ([Striking Mechanism Using Gas and Hydraulic Pressure]).

However, in the case of the conventional breaker, there is a problem that the size of the gas chamber housing constituting the gas chamber must be increased in order to increase the volume of the gas chamber 50 for more efficient operation. In addition, due to the characteristic that a relatively high-pressure operating gas is used, the gas chamber is usually configured so that its main shape is a cylindrical shape. On the other hand, most of the outer shape of the gas chamber housing is a rectangular parallelepiped, .

In the meantime, the biggest problem of the existing invention is that when the piston is operated for hitting the chisel, vibrations occur during operation due to the load applied by the pressure of the working gas to the gas chamber housing, so that the mechanical strength and durability There is a disadvantage in that it is disadvantageous to secure.

Patent No. 10-0078639

It is an object of the present invention to solve the above-mentioned problems of the prior art, and it is possible to increase the volume of the gas chamber to about 130 to 250% even in the case of the gas chamber housing of the same size, And a gas chamber structure of the breaker which can increase the gas chamber structure of the breaker.

In addition, since vibration due to the load applied by the pressure of the working gas to the gas chamber housing during the operation of the piston for hitting the chisel is much canceled by the load in the opposite direction applied to the gas chamber expansion hole formed in the cylinder, The vibration generated during the operation of the breaker is extremely reduced, thereby providing a structure of the gas chamber of the breaker which is very advantageous in ensuring mechanical strength and durability.

The gas chamber structure of the breaker of the present invention for achieving the above object is a breaker in which a gas chamber housing 700 formed with a gas chamber 710 is coupled to a cylinder 600, And a side expansion chamber 720 formed at one or more positions in the gas chamber housing 700 and formed in the cylinder 600. The gas chamber housing 700 is opened in a direction opposite to that of the gas chamber housing 700, A gas vent hole 730 formed in the gas chamber housing 700 such that the side expansion chamber 720 and the gas chamber expansion hole 420 are communicated with each other; And a control unit.

Further, the gas chamber 710 has a main shape of a cylindrical shape, and the side expansion chambers 720 are formed at predetermined intervals along the outer circumferential edge of the gas chamber 710, And has a shape of a part of the surface.

And is formed in a corner of the gas chamber housing (700).

According to the present invention, even in the case of a gas chamber housing of the same size, it is possible to increase the volume of the gas chamber by about 130 to 250%, thereby greatly increasing the operating efficiency of the breaker relative to the overall size thereof have.

In addition, since vibration due to the load applied by the pressure of the working gas to the gas chamber housing during the operation of the piston for hitting the chisel is much canceled by the load in the opposite direction applied to the gas chamber expansion hole formed in the cylinder, The vibration generated when the vibration is generated is extremely reduced, which is advantageous in securing the mechanical strength and securing the durability.

1 shows a schematic configuration of a breaker according to an embodiment of the present invention;
2 is a perspective view showing a gas chamber structure of a breaker according to an embodiment of the present invention;
3 is a side cross-sectional view showing a gas chamber structure of a breaker according to an embodiment of the present invention;
4 is a front sectional view of the gas chamber housing of the gas chamber structure of the breaker according to one embodiment of the present invention.
5 is a schematic view for explaining the vibration canceling effect of the gas chamber structure of the breaker according to the embodiment of the present invention.

Hereinafter, a gas chamber structure of a breaker according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts are denoted by the same reference numerals whenever possible. In describing the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

As shown in FIG. 2, the gas chamber structure of the breaker of the present invention includes a side expansion chamber 720 formed by machining at least one position on the side surface of the gas chamber 710, a plurality of side expansion chambers 720 formed in the cylinder 600, The gas chamber extension hole 420 is opened in the direction of the gas chamber housing 700 and in the opposite direction to the gas chamber extension hole 420. The gas chamber extension hole 420 and the gas chamber extension hole 420 are communicated with each other, And a gas vent hole (730) formed in the gas chamber housing (700).

In this case, it is common that the gas chamber 710 has a cylindrical shape in its main shape in order to prevent uniform distribution of the operating gas pressure and hence stress concentration. 4, the side-side expansion chamber 720 may be formed in a side surface of the gas chamber 710 so as to prevent a uniform distribution of the operating gas pressure, And the main shape is preferably a shape of a part of the cylinder.

On the other hand, in the gas chamber housing 700 having a shape similar to a rectangular parallelepiped, the side expansion chamber 720 is formed to have a thickness as large as a predetermined thickness while ensuring as much volume as possible So as to be formed in a corner of the gas chamber housing (700).

In the case of the gas chamber structure of the breaker having the above characteristics, the volume of the portion substantially functioning as the gas chamber is substantially the same as the volume of the gas chamber 710, the side expansion chamber 720, 730 and the gas chamber expansion holes 420. Therefore, even when the gas chamber housing 700 of the same size is applied, the volume of the substantial gas chamber is increased to about 130 to 250% It is possible to greatly increase the operating efficiency of the breaker with respect to the overall size thereof.

Meanwhile, when the piston for hitting the chisel is operated, a load is applied to the gas chamber housing 710 as indicated by a black arrow in FIG. 5 due to the pressure of the working gas, , The gas chamber expansion hole 420 formed in the communicating cylinder is subjected to a load in the opposite direction as indicated by a black arrow. Therefore, since the vibrations generated by the load due to the load in the opposite direction are canceled by a large amount, the vibration generated during the operation is extremely reduced, which is advantageous in securing the mechanical strength and securing the durability.

In the foregoing, optimal embodiments have been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Valve plug 200: Valve spool
300: Valve housing VR: Valve chamber
400: cylinder
410: Piston operating ball
420: expansion chamber for gas chamber
500: Chisel
600: piston
700: gas chamber housing 710: gas chamber
720: side extension chamber
730: Gas ventilation

Claims (3)

In the breaker in which the gas chamber housing 700 with the gas chamber 710 formed therein is coupled to the cylinder 600,
A side extension chamber 720 formed at one or more sides of the gas chamber 710;
A plurality of gas chamber extension holes (420) formed in the cylinder (600), the gas chamber housing (700) direction being open and the opposite direction being closed;
A gas vent hole 730 formed in the gas chamber housing 700 such that the side expansion chamber 720 and the gas chamber expansion hole 420 are communicated with each other; And the gas chamber structure of the breaker.

The method according to claim 1,
The gas chamber 710 has a cylindrical shape in its main shape,
Wherein the side expanding chamber (720) is formed at a predetermined interval along the outer periphery of the side surface of the gas chamber (710), and the main shape of the side expanding chamber (720) is a part of the cylinder. The method according to claim 2,
Wherein the side extension chamber (720) is formed in a corner direction of the gas chamber housing (700).

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