KR101355133B1 - Breaker structure equipment of excavator - Google Patents

Abstract

The present invention relates to a breaker structural apparatus for an excavator and, more specifically, to a breaker structural apparatus in which a piston is divided into first and second pistons which are connected and can be detached, and the piston is raised by a hook part and hits a chisel part by free-fall or fall due to inflation pressure of a compression chamber when the hook unit releases the piston. According to the present invention, whole piston replacement which conventionally results from damage to a piston due to strong friction between the piston and a chisel part such as piston breakage can be prevented, and only a first piston which directly comes into contact with the chisel part is replaced, thereby saving costs.

Description

Breaker structure equipment of excavator

The present invention relates to a breaker structure device of an excavator, and more particularly, the piston is divided into a first piston, a second piston and a third piston so as to be detachably connected to each other, and the piston is connected to an upper side by a hook portion of the cylinder. When the hook is dropped, the piston falls downward due to free fall or the compression pressure of the compression chamber, and hits the chisel. Thus, damage such as piston damage occurs due to strong friction between the piston and the chisel. It relates to a breaker structure of an excavator, which prevents replacement of the whole and reduces the cost of replacing only the first piston directly rubbed with the chisel part.

Excavator is a construction machine that carries out the work of moving equipment as civil engineering, construction, excavation work digging ground, loading work carrying soil, shredding work dismantling building, stopping work to clean up the ground. It is a kind of construction equipment that is composed of sieves and is used mostly when breaking buildings, digging roads, or removing rocks such as mountains.

Here, as shown in FIG. 1, the excavator consists of the lower traveling body 1 and the upper traveling body 2, and an operator rides on this upper traveling body 2, and the cab 3 for operation. At the same time, the front work mechanism 4 and the like are provided. The front work mechanism 4 is provided with the boom 5 provided in the upper traveling body 2 so that lowering and raising operation | movement is possible, and the arm 6 connected to the front-end | tip of this boom 5 so that up-and-down rotation is possible. The front attachment is detachably attached to the tip of the arm 6. A typical front attachment is the bucket, which is suitable for digging soil. In addition to this bucket, there are various kinds of front attachments, and an optimal front attachment is attached to the arm 6 according to the kind of work to be performed.

In addition, a breaker 7 is attached to the tip of the arm 6 as a front attachment of a hydraulic excavator in order to grind the pulverized object such as a large rock or concrete mass. The breaker 7 is configured to drive the chisel 8 made of a steel bar with a sharp tip at the breaker cylinder 9. Therefore, by supplying the hydraulic oil from the hydraulic pump to the breaker cylinder 9 of the breaker 7, the chisel 8 reciprocates and pulverizes it by hitting the object to be milled.

In general, a breaker 7 or an arm drill drift hammer is a work tool used to crush rock or dismantle concrete and asphalt structures in civil engineering or building foundation work by mounting it on the arm of heavy equipment such as an excavator. As shown, a cylinder (9) with a piston (10) and a chisel (8) directly colliding with the rock and crushing the rock is provided so that the piston (10) is reciprocating up and down by hydraulic or pneumatic, and the chisel installed below While hitting (8), the chisel (8) is reciprocated up and down by a predetermined stroke to impact and fracture by rock or the like.

However, in the current way of hitting the chisel with a strong force, the piston is inevitably damaged, as well as the wear and damage of the chisel, in case of damage, the entire piston must be replaced and the resulting cost is large. In order to minimize the cost, there is no special measure other than the method of increasing the rigidity of the piston to improve the durability, but there is a problem in that the cost of manufacturing and finished products for improving the durability is large.

Republic of Korea Patent Publication No. 10-2004-0079396 (2004.09.14) Republic of Korea Patent Publication No. 10-2005-0030236 (2005.03.29) Republic of Korea Patent Publication No. 10-2009-0022475 (2009.03.04)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

The piston is divided into a first piston, a second piston and a third piston so as to be detachably connected to each other, and the piston is driven upward by the hook portion of the cylinder. As the hook portion is dropped, the piston free falls or expands the compression chamber. By hitting the chisel part downward due to the pressure, a conventional friction between the piston and the chisel part prevents damage such as damage to the piston and prevents the entire piston from being replaced. It is an object of the present invention to provide a breaker rescue device for an excavator in which only one piston is dropped and the cost is reduced.

In order to achieve the above object, the present invention comprises a cylinder case having a hollow inside and a chisel portion at an inner lower end and a compression chamber provided at an inner upper end, and a cylinder formed at one end of the cylinder case to drive a piston upward. A cylinder portion;

A first piston installed inside the cylinder case and hitting the chisel;

A second piston connected to one end of the first piston to be detachable and having a locking groove formed to be connected to the cylinder at an outer periphery of the end;

A third piston connected to one end of the second piston so as to be detachable and driven upward by the cylinder and driven downward by a compression force of the compression chamber to strike the first piston by the chisel;

A cap installed at the end of the third piston to prevent friction with the cylinder case when the third piston is driven up and down while preventing the compressive force of the compression chamber from being directly transmitted to the third piston and being damaged. It relates to a breaker structure of an excavator, characterized in that configured.

As described above, the breaker structure device of the excavator of the present invention is connected to the piston is divided into the first piston, the second piston and the third piston so as to be detachable to each other, the piston is the upper side by the hook portion of the cylinder When the hook is dropped, the piston falls downward due to free fall or the compression pressure of the compression chamber, and hits the chisel. Thus, damage such as piston damage occurs due to strong friction between the piston and the chisel. It is possible to prevent the entire replacement and to reduce the cost of replacing only the first piston directly rubbed with the chisel part.

1 is a schematic diagram showing an excavator equipped with a conventional breaker,
2 is a cross-sectional view showing a conventional breaker,
3 is a cross-sectional view showing a breaker structure device of an excavator according to an embodiment of the present invention,
Figure 4 is a schematic diagram showing the operation of the breaker rescue device of the excavator according to an embodiment of the present invention,
5 is a cross-sectional view showing a breaker structure device of an excavator according to another embodiment of the present invention.

The present invention has the following features in order to achieve the above object.

The present invention includes a cylinder case which is hollow and has a chisel portion at an inner lower end thereof, and a compression chamber at an upper end portion thereof, and a cylinder part formed at one end of the cylinder case to drive a piston upward;

A first piston installed inside the cylinder case and hitting the chisel;

A second piston connected to one end of the first piston to be detachable and having a locking groove formed to be connected to the cylinder at an outer periphery of the end;

A third piston connected to one end of the second piston so as to be detachable and driven upward by the cylinder and driven downward by a compression force of the compression chamber to strike the first piston by the chisel;

A cap installed at the end of the third piston to prevent friction with the cylinder case when the third piston is driven up and down while preventing the compressive force of the compression chamber from being directly transmitted to the third piston and being damaged. It is characterized in that the configuration.

The present invention having such characteristics can be more clearly described by the preferred embodiments thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing in detail several embodiments of the present invention with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the details of construction and the arrangement of components shown in the following detailed description or illustrated in the drawings will be. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as "left," " right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first "and" second "are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

3 is a cross-sectional view showing a breaker structure device of an excavator according to an embodiment of the present invention, Figure 4 is a schematic diagram showing the operation of the breaker structure device of an excavator according to an embodiment of the present invention, Figure 5 is a view of the present invention Sectional drawing showing the breaker structure device of an excavator according to another embodiment.

As shown in Figures 3 to 5, the breaker rescue device of the excavator of the present invention is installed in an excavator, excavator, etc., which is a kind of construction equipment that is mostly used when crushing a building, digging a road, or removing a rock such as a mountain It is comprised by the cylinder part 100, the 1st piston 200, the 2nd piston 300, and the 3rd piston 400. As shown in FIG.

3 to 4, the cylinder part 100 is hollow and has a cylinder case 110 having a chisel part 20 at an inner lower end thereof and a compression chamber 130 at an inner upper end thereof. It is formed in one end of the cylinder case 110 is composed of a cylinder 120 for driving the piston (200, 300, 400) up.

Here, the cylinder case 110, as shown in Figure 3, the chisel portion 20 consisting of a chisel and a key is installed at the lowermost end of the hollow interior, the compression chamber 130 filled with a filler such as nitrogen at the top end of the hollow interior ) Is provided, the inlet 131 and the outlet 132 for filling and discharging the filling is formed on the outer surface of the compression chamber 130, respectively.

In addition, the compression chamber 130 is a third piston 400 is driven inwardly as the internal space is narrow and a strong compressive force is generated in the filling, and the compression force to strongly push the third piston 400 to the lower side will be.

In addition, the outer surface of the cylinder case 110 has a through portion (120) so that the shaft 121 and the hook portion 122 of the cylinder 120 are connected to the second piston 300 provided inside the cylinder case 110. 111 is formed, and the penetrating portion 111 is formed to be longer by an interval in which the shaft 121 of the cylinder 120 is driven up and down.

On the other hand, the cylinder 120 is installed outside the cylinder case 110, as shown in Figures 3 to 4, the shaft 121 is driven up and down by hydraulic or pneumatic pressure, the end of the shaft 121 In the hook portion 122 is hinged to be engaged with the engaging groove 310 of the second piston (300).

Here, the hook portion 122 is caught by the engaging groove 310 of the second piston 300 and at the same time in contact with one side of the third piston 400, the third piston 400 to the predetermined interval upwards After driving, it will be described in more detail below in a manner that the locking groove 310 of the second piston 300 is dropped.

4, the shaft 121 of the cylinder 120 is driven at a predetermined interval and is removed from the locking groove 310 of the second piston 300, as shown in FIG. 4. While being caught by the stopper 112 protruding from one end of the cylinder case 110 and rotated outward by the hinge, it is dropped out of the locking groove 310 of the second piston 300. The pistons 200, 300, and 400 are driven downward by the free fall and the expansion pressure of the compression chamber 130.

In addition, the stopper 112 is formed in the through part 111 of the cylinder case 110 and pushes outward while contacting with a locking protrusion (not shown) protruding obliquely on the upper portion of the hook part 122 driven upward. The hook portion 122 is rotated outward.

3 to 4, the piston is driven upward by the cylinder portion 100, and the impact force on the chisel portion 20 while being driven downward by the expansion pressure and free fall of the compression chamber 130. By transmitting the, the first piston 200, the second piston 300 and the third piston 400 is composed, the first piston 200, the second piston 300 and the third piston 400 Are connected to each other to be detachable.

Here, as shown in FIG. 3, the first piston 200 is installed at a portion of the cylinder case 110 that is in contact with the chisel portion 20 to strike the chisel portion 20 and the chisel portion 20. ) It is made of high-strength material for direct contact with

And, the upper portion of the first piston 200 is formed with a protrusion (not shown) to be connected to the second piston 300, the thread is formed on the outer periphery of the protrusion so as to be detachable with the second piston 300. do.

In addition, as shown in FIG. 3, the second piston 300 has a coupling groove (not shown) in the upper and lower portions, respectively, to allow the protrusion and the third piston 400 of the first piston 200 to be attached and detached. Is formed, the inner periphery of the coupling groove is further threaded to be screwed with the first piston 200 and the third piston 400 to connect the first piston 200 and the third piston 400 will be.

In addition, a locking groove 310 is formed at the outer periphery of the end of the second piston 300, that is, at the uppermost outer periphery, so that the hook portion 122 of the cylinder 120 is engaged, and the locking groove 310 is formed. One side is formed to be inclined so that the hook portion 122 easily falls out when dropped.

Here, the third piston 400, as shown in Figure 3, is coupled to the coupling groove of the second piston 300, a protrusion (not shown) is formed at the lower end so as to be detachable, the second periphery of the protrusion A thread is formed in the coupling groove of the piston 300 to be detachable.

In addition, the third piston 400 is provided inside the cylinder case 110, and is provided between the compression chamber 130 and the second piston 300 to engage the locking groove 310 of the second piston 300. It is driven upward by the cylinder 120 is caught, and driven downward by the compression force of the compression chamber 130 to strike the first piston 200 to the chisel portion 20.

In addition, the upper portion of the third piston 400, as shown in Figure 4, while the compression force of the compression chamber 130 is directly transmitted to the third piston 400, while preventing damage to the upper and lower third piston 400 In operation, a special rubber cap 410 is further installed to prevent friction with the cylinder case 110, and a coupling protrusion (not shown) is provided at one side of the third piston 400 to fit the cap 410. Further formed, the engaging projection is formed in the form of an arc or a horizontal plane to receive the expansion pressure of the compression chamber 130 flexibly.

Here, the space 430 spaced apart from each other to prevent the left and right vibration of the third piston 400 is transmitted to the cap 410, as shown in Figure 3 between the third piston 400 and the cap 410. Is formed, spaced apart from each other while interconnecting between the third piston 400 and the cap 410, as shown in Figure 5 to prevent the upper and lower vibrations of the third piston 400 is transmitted to the cap 410 The connecting shaft 440 is further installed to form the space portion 430.

In addition, a plurality of seals 420 are further installed between the cap 410 and the cylinder case 110 to seal the inflow of nitrogen from the compression chamber 130 into the cylinder case 110. In order to prevent the filling of the compression chamber 130 from being discharged to the outside through the penetrating portion 111 of the cylinder case 110, the sealing force of the compression chamber 130 is maintained.

100: cylinder 110: cylinder case
111: through part 112: stopper
120: cylinder 121: shaft
122: hook portion 130: compression chamber
131: inlet 132: outlet
200: first piston 300: second piston
310: engaging groove 400: third piston
410: cap 420: sealing
430: space portion 440: connecting shaft

Claims (4)

A hollow case is formed in the cylinder case 110 having a chisel part 20 at an inner lower end and a compression chamber 130 at an upper end thereof, and formed at one end of the cylinder case 110 to drive a piston upward. Cylinder unit 100 is composed of a cylinder 120 to make;
A first piston (200) installed inside the cylinder case (110) and striking the chisel portion (20);
A second piston (300) connected to one end of the first piston (200) so as to be detachable and having a locking groove (310) formed to be connected to the cylinder (120) at an outer periphery of the end;
It is connected to one end of the second piston 300 so as to be detachable, and is driven upward by the cylinder 120, driven downward by the compression force of the compression chamber 130 is the first piston 200 A third piston 400 that strikes the chisel portion 20;
The cylinder is installed at the end of the third piston 400 to prevent the compression force of the compression chamber 130 is directly transmitted to the third piston 400 to prevent damage to the upper and lower driving of the third piston 400, the cylinder Cap 410 to prevent friction with the case 110;
Breaker rescue device of the excavator, characterized in that comprising a.
The method of claim 1,
Between the third piston 400 and the cap 410 is formed a space portion 430 spaced apart from each other to prevent the vibration of the third piston 400 is transmitted to the cap 410, the cap 410 Breaker structure of the excavator, characterized in that a plurality of seals 420 are further installed to seal the inflow of nitrogen into the cylinder case 110 between the cylinder case 110 and the cylinder case (110).
3. The method of claim 2,
Breaker structure of the excavator, characterized in that the connecting portion 440 is further installed so that the third piston 400 and the cap 410 are connected to each other while being spaced apart from each other.
The method of claim 1,
The cylinder 120 has a shaft 121 is driven up and down hydraulically, the hook portion 122 is hinged to the end of the shaft 121 to be caught by the locking groove 310 of the second piston (300). Is coupled, the hook portion 122 is caught by the engaging groove 310 of the second piston 300 and at the same time in contact with one side of the third piston 400 to drive a predetermined interval upwards, the second piston 300 Breaker structure of the excavator, characterized in that the first, second and third pistons (200, 300, 400) is driven downward by the free fall and the expansion pressure of the compression chamber 130 by falling out of the engaging groove (310) of the.

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