KR101791910B1 - Controlled variable rock strength test equipment for construction machinery attachments - Google Patents

Controlled variable rock strength test equipment for construction machinery attachments Download PDF

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KR101791910B1
KR101791910B1 KR1020160031071A KR20160031071A KR101791910B1 KR 101791910 B1 KR101791910 B1 KR 101791910B1 KR 1020160031071 A KR1020160031071 A KR 1020160031071A KR 20160031071 A KR20160031071 A KR 20160031071A KR 101791910 B1 KR101791910 B1 KR 101791910B1
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hydraulic
hydraulic cylinder
housing
plate
base portion
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KR1020160031071A
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Korean (ko)
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KR20170107293A (en
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박종원
김성현
최병오
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한국기계연구원
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means

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  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

According to the present invention, there is provided a portable terminal comprising: a base portion formed in a concave shape and having an open upper side and a receiving space formed therein; A cushioning portion accommodated in the base portion and recessed to correspond to an inner space of the base; A hydraulic cylinder in which a lower side of the housing is inserted and positioned inside the buffer, and a striking plate is coupled to an upper end of the rod; And a connecting hole is formed in the base portion and the buffer portion to penetrate the inner side surface and the outer side surface of the base portion and the buffer portion to be connected to the inlet port, Which can test the performance test and durability of construction machine attachments such as hydraulic breakers by controlling the hydraulic pressure applied to the hydraulic breaker, and to test the controllability of the hydraulic breaker by reproducing the strength of each quality of the hydraulic breaker during the operation test of the hydraulic breaker The present invention relates to a control apparatus for variable rock strength.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rock-

The present invention relates to an actual vehicle reproduction test apparatus such as a hydraulic breaker, vibration ripper and other rock crushing apparatus, which is an attachment of a construction machine such as a rock excavation excavator. The operation frequency, operating performance and automatic mode Controllability, etc., and it is possible to reproduce the strength of the rock during the operation test of the hydraulic breaker, so that the performance test and the durability test can be performed by adjusting the hydraulic pressure according to the stroke number of the hydraulic breaker. .

The hydraulic breaker is mounted on a construction machine such as an excavator, a loader, etc., and the kinetic energy of the piston reciprocating from the hydraulic power to the power source is transmitted to the chisel as impact energy to crush the rock and concrete.

The hydraulic breaker generally includes a body 10 including a back head 11, a cylinder 12, and a front head 13 as shown in Fig. 1; A piston 20 provided inside the body 10; And a chisel 30 coupled to one side of the body 10 to be hit by the operation of the piston 20; And a gas chamber 14 is formed in the back head 11 so that the upper end of the piston is disposed and the piston 20 is reciprocated by the operation of the control valve 40 formed on one side of the cylinder 12. [ So that the chisel 30 can be hammered while being moved.

The performance of such a hydraulic breaker can generally be represented by the striking energy, and the amount of energy transmitted through the chisel by a single stroke of the piston is the striking energy. The performance, durability, and reliability of the hydraulic breaker are evaluated by examining the impact energy, impact frequency, impact efficiency, and durability life of the hydraulic breaker.

Conventionally, in order to test the performance of the hydraulic breaker as described above, a hydraulic breaker is directly attached to a construction machine such as an excavator, the lower end of the hydraulic breaker is brought into contact with the metal hitting bracket of the hitting base installed on the ground, The performance of the hydraulic breaker was tested by operating the hydraulic breaker while pressing the breaker. In this case, the striking base for striking is generally embedded in the ground to form a rectangular base structure, a metal striking pedestal is horizontally installed therein, and the lower side and the periphery of the metal striking pedestal are filled with an elastic material .

However, a hydraulic breaker capable of controlling the performance of each rock to be crushed due to the improvement of the current technology level has been developed and marketed. However, such a conventional hitting base can not be reproduced by the strength of the rock. That is, a striking base and a control device for testing a control method and control performance of a construction machine attachment such as a hydraulic breaker are needed.

KR 10-1452901 B1 (October 14, 2014)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems as described above, and it is an object of the present invention to test the performance test and durability life of a construction machine attachment such as a hydraulic breaker, And the controllability of the hydraulic breaker can be tested by reproducing the control signal.

In order to accomplish the above object, there is provided a rock strength variable control type testing apparatus for a construction machine attachment, comprising: a base portion formed concavely and having an upper side opened and a receiving space formed therein; A cushioning portion accommodated in the base portion and recessed to correspond to an inner space of the base portion; A hydraulic cylinder in which a lower side of the housing is inserted and positioned inside the buffer, and a striking plate is coupled to an upper end of the rod; Wherein an inlet port is formed through the lower portion of the housing of the hydraulic cylinder and a connecting hole is formed in the base portion and the buffer portion to penetrate the inner side surface and the outer side surface to be connected to the inlet port.

Further, the diameter of the connection holes connected to the inlet is formed to be larger than the diameter of the inlet formed in the housing.

In addition, an upper cushion is installed at the upper end of the piston and a lower cushion is installed at the lower end.

Further, the upper end of the rod is inserted into the striking plate, and the striking plate is coupled to the rod by the fastening means in the lateral direction around the striking plate.

The cushioning portion may be formed of wood, which is disposed in a lateral direction so as to surround the housing of the hydraulic cylinder along the inner circumference of the housing, and sand, which is disposed on the inner side of the wood and on the lower side of the housing, An elastic member, a metal plate, and an anti-vibration rubber.

Further, the base portion is characterized in that the fixing plate is coupled to the base portion so as to press the upper end of the buffer portion.

The housing of the hydraulic cylinder has a step formed on an outer circumferential surface thereof, and a fixing block is coupled to the fixed plate so that the upper end of the step is caught.

Further, the housing of the hydraulic cylinder has a flange formed on the outer circumference thereof, the flange is disposed on the upper side of the fixed plate, and the anti-vibration rubber is interposed between the flange and the fixed plate to closely contact each other.

The apparatus may further include a supply pressure controller connected to the connection hole of the base to supply the hydraulic pressure to the hydraulic cylinder and to control the hydraulic pressure supplied to the hydraulic cylinder.

The supply pressure control unit may include a hydraulic pump; A supply and shutoff valve connected to the hydraulic pump to supply and shut off the pressure fluid supplied to the hydraulic cylinder; A pressure regulating valve connected to the supply and shutoff valve to control the supply pressure; And an accumulator installed in a flow path for supplying a pressure fluid between the pressure regulating valve and the hydraulic cylinder; And a control unit.

The accumulator is characterized in that a plurality of different operating pressures are installed in parallel.

The rock strength variable control type test apparatus for the construction machine attachment of the present invention can perform the performance test and the durability test of the construction machine attachment such as the hydraulic breaker and can test the stroke control rate of the hydraulic breaker by reproducing the strength of the rock quality There are advantages.

1 is a sectional view showing a conventional hydraulic breaker;
FIG. 2 and FIG. 3 are a perspective view and a front sectional view showing a rock strength control type test apparatus for a construction machine attachment according to an embodiment of the present invention.
4 is a front sectional view showing another embodiment of the hydraulic cylinder housing according to the present invention.
5 is a hydraulic circuit diagram showing a configuration in which a supply pressure control unit is connected to a hydraulic cylinder of a striking base according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rock strength control type test apparatus for a construction machine attachment of the present invention having the above-described configuration will be described in detail with reference to the accompanying drawings.

[Example 1]

2 and 3 are a perspective view and a front sectional view showing a rock strength control type test apparatus for a construction machine attachment according to an embodiment of the present invention.

As shown in the figure, the rock strength variable control type testing apparatus 1000 for a construction machine attachment according to an embodiment of the present invention includes: a base portion 100 formed concavely and having an upper side opened and a receiving space formed therein; A buffer part 200 accommodated in the base part 100 and recessed to correspond to the internal space of the base part 100; A hydraulic cylinder 300 in which the lower side of the housing 310 is inserted and positioned inside the buffer part 200 and the striking plate 340 is coupled to the upper end of the rod 321; And an inlet 311 is formed through the lower portion of the housing 310 of the hydraulic cylinder 300. The base portion 100 and the buffer portion 200 are formed with a plurality of through holes 311, And connection holes 121 and 211 that penetrate through the side surface and the outer side surface may be formed.

A rock strength variable control type test apparatus 1000 for a construction machine attachment of the present invention comprises a base unit 100, a buffer unit 200 and a hydraulic cylinder 300 equipped with a striking plate 340, Connection holes 121 and 211 may be formed in the base portion 100 and the buffer portion 200 so as to be connected in series with the inlet port 311 formed in the cylinder 300. So that it can be formed as a striking base including the above configuration.

The base part 100 may be formed of a metal material so as to have a sufficient rigidity as a base part. The base part 100 is coupled to the upper side of the horizontal board 110 to connect the horizontal board 110 and the vertical board 120, And can be formed in the form of a concave container. That is, the receiving space may be formed so that the lower side is closed by the horizontal plate 110, the side is surrounded by the vertical plate 120, and the upper side is opened. At this time, the vertical plate 120 may be formed in a rectangular shape that surrounds the side surfaces, or may be formed in a circular shape. The strength of the base part 100 can be improved by joining the reinforcing plate 130 to the base part 100 so that both ends are coupled to the horizontal part 110 and the vertical part 120. The base 100 may be placed on the ground so that the lower surface of the horizontal plate 110 is in contact with the ground, and may be fixed to the ground using fastening means or the like.

The buffer part 200 is a part capable of absorbing shock and vibration and is formed in a concave shape that is accommodated in the base part 100 and corresponds to the accommodation space inside the base part 100 As shown in Fig. The buffer part 200 may be coupled to the inner circumferential surface of the base part 100 in a close contact manner. In addition, the buffer part 200 may be formed of various materials other than a single material, and various materials may be sequentially inserted or filled into the base part 100. The description thereof will be described in more detail below.

The hydraulic cylinder 300 is coupled with the upper portion of the housing 310 and the upper portion of the rod 321 and the rod 321 so that the lower portion of the housing 310 is inserted into the buffer portion 200 to be housed. The striking plate 340 may be disposed such that it is exposed to the upper side that is outside the base portion 100 and the buffer portion 200. The hydraulic cylinder 300 may be formed in a container shape so that the piston 320 may be inserted into the housing 310 which is closed at the lower side and opened at the upper side so that the piston 320 is coupled to the piston 320, And can be extended upward. The rod cover 330 may be coupled to the upper end of the housing 310 to seal the upper side of the housing 310 so that the upper portion of the rod 321 is exposed to the outside, A flange may be protruded and fixed to the upper side of the housing 310 by a fastening means or the like. In this case, the housing 310 may be provided with an inlet 311 passing through the inner side surface and the outer side surface so that the hydraulic oil can be supplied to the housing 310. When the hydraulic oil is supplied through the inlet 311, 321 can linearly move along the housing 310 in the vertical direction.

An inlet 311 may be formed in a lower side of the housing 310 of the hydraulic cylinder 300 in a lateral direction and an inlet 311 may be formed at a lower height than the height of the base 100 and the upper end of the buffer 200 An inlet 311 may be formed in the lateral direction. The base portion 100 and the buffer portion 200 may be formed with connection holes 121 and 211 which penetrate the inner side surface and the outer side surface to be connected to the inlet 311. That is, the piping for supplying the operating fluid can be installed and connected to the outside of the connection hole 121 of the base part 100. The operating fluid is supplied to the housing 310 through the inlet 311 and the connecting holes 121 and 211, Lt; / RTI >

The pressure of the hydraulic oil supplied to the hydraulic cylinder 300 may be adjusted to adjust the pressure of the hydraulic oil supplied to the hydraulic cylinder 300, Strength can be reproduced. Thus, when the operating oil is supplied to the hydraulic cylinder 300 with a pressure corresponding to the rock to be tested, the hydraulic breaker is operated by touching the chisel of the hydraulic breaker to the striking plate 340 to perform the blow test. At this time, since piping for supplying the hydraulic oil can be installed and connected to the outside of the connection hole 121 of the base part 100, even if vibrations and shocks are applied to the hydraulic cylinder 300 during the impact test of the hydraulic breaker, Since vibrations and shocks transmitted to the base unit 100 are reduced by the main body 200, a connection port such as a nipple or a coupling, which is provided to connect the hydraulic fluid supply pipe to the connection hole 121 formed in the base unit 100, It is possible to prevent leakage of the operating oil from being generated.

As described above, the rock strength control type test apparatus for construction machine attachment of the present invention can perform the performance test and the durability test of a construction machine attachment such as a hydraulic breaker, and the strength control of the hydraulic breaker is tested can do.

The diameters of the connection holes 121 and 211 connected to the inlet 311 may be larger than the diameter of the inlet 311 formed in the housing 310.

That is, although a part of the lower side of the housing 310 of the hydraulic cylinder 300 is inserted and coupled to the inside of the cushion unit 200, a large external force, shock, and vibration are acted upon the impact test of the hydraulic breaker, And the housing 310 may occur, and movement in the vertical direction may occur. Accordingly, the inlet port 311 of the housing 310 may not completely coincide with the connection holes 121 and 211, and even the connection may not be established. Therefore, the connection holes 121 and 211 connected to the inlet 311 are formed to be larger in diameter than the inlet 311, and the inlet 311 and the connection holes 121 and 211, The entire inlet port 311 can always be connected to the connection hole 211 formed in the buffer part 200 so that the pressure supplied to the hydraulic cylinder due to the vibration of the hydraulic cylinder 300 fluctuates So that a more accurate test can be made.

An upper cushion 360 may be installed at the upper end of the piston 320 and a lower cushion 370 may be provided at the lower end of the piston 320.

That is, the piston 320 coupled with the rod 321 moves up and down due to vibration and impact when the hydraulic breaker is hit, so that the rod cover 330 or the housing 310 hits the bottom surface, The upper cushion 360 may be provided at the upper end of the piston 320 and the lower cushion 370 may be provided at the lower end thereof. The coupling means for fixing the rod cover 330 to the housing 310 by the buffering action of the upper cushion 360 and the lower cushion 370 may not be broken and the rod cover 330, And the piston 320 can be prevented from being deformed or damaged.

The upper end of the rod 321 is inserted into the striking plate 340 and the striking plate 340 is coupled to the rod 321 by the fastening means 350 in the lateral direction around the striking plate 340 .

That is, as shown in the drawing, the lower surface of the striking plate 340 is concave upwardly so that the upper end of the rod 321 can be inserted into the concave space of the striking plate 340, The fastening means 350 may be coupled to the side surface of the rod 340 so that the striking plate 340 can be fixed to the rod 321. A through hole is formed in the circumferential portion of the striking plate 340 in the horizontal direction and a fastening hole is formed in the rod 321 in the horizontal direction in the form of an female screw or the like so that the fastening means 350, The plate 340 can be coupled to the rod 321 to be firmly fixed.

As a result, the upper surface of the striking plate 340 can be smoothly formed so as to have a uniform thickness, and the striking plate 340 can be smoothly formed with a chisel of a hydraulic breaker, The center of the striking plate 340 can be struck when the upper surface of the striking plate 340 is tested. Thus, more accurate testing is possible, and damage and breakage of the fastening means can be prevented.

The buffer part 200 includes a wood 210 disposed in a lateral direction so as to surround the housing 310 of the hydraulic cylinder 300 along the inner circumference of the housing 310, The elastic member 230, the metal plate 240, and the anti-vibration rubber 250, which are disposed on the lower side of the housing 310 and are stacked in order from the lower side to the upper side.

That is, the buffer part 200 for absorbing vibrations and shocks can be formed in a combination of various materials, so that vibration and shock transmitted from the hydraulic cylinder 300 to the base part 100 can be more effectively Absorbing layer. At this time, the wood 210 may be formed vertically along the inner surface of the vertical plate 120 of the base 100, and the outer surface of the wood 210 may be closely contacted. Since the outer circumferential surface of the hydraulic cylinder 300 is generally circular, the inner circumferential surface of the wood 210 may have a circular shape corresponding to the hydraulic cylinder 300. The upper end of the wood 210 is formed to have the same height as that of the vertical plate 120 so that the lower end of the wood 210 is in close contact with the upper surface of the horizontal plate 110 of the base 100, And can be pressed and fixed in the vertical direction. The metal plate 240 is placed on the upper side of the elastic member 230 after the sand 220 is filled in the wood 210 to a specific thickness and the elastic member 230 such as a waste tire is stacked on the sand 220, The elastic member 220 and the elastic member 230 can be pressed in a flat state. The anti-vibration rubber 250 may be laminated on the upper side of the metal plate 240. At this time, the sand 220, the elastic member 230, the metal plate 240, and the vibration-proof rubber 250 may be disposed in the inner lower part of the wood 210 and stacked to form respective layers in a horizontal form .

In addition, the base plate 100 may be coupled to the base plate 100 by a fixing plate 140 so as to press the upper end of the buffering unit 200.

That is, the plate-shaped fixing plate 140 can be coupled to the upper end of the vertical plate 120 of the base unit 100 so that the buffer unit 200 can be pressed and fixed as described above. At this time, the fixing plate 140 may be formed in the shape of a donut through which a hole penetrating the upper and lower surfaces is formed at the center, and the hydraulic cylinder 300 can pass through the hole. In addition, the upper end of the wood 210, which is a vertical portion of the buffer part 200, can be pressed downward by the fixing plate 140.

Thus, even if the housing 310 of the hydraulic cylinder 300 moves up and down due to vibration and impact, the buffer part 200 can be kept stationary without moving.

The housing 310 of the hydraulic cylinder 300 has a step 313 formed on an outer circumferential surface thereof and the fixing block 150 may be coupled to the fixing plate 140 so that the upper end of the step 313 is caught .

In other words, the hydraulic cylinder 300 may be fixed and coupled in various forms so as to restrict the upward and downward movement. For example, as shown in the figure, the outer diameter of the upper side of the housing 310 is formed smaller than the outer diameter of the lower side, The fixing block 150 may be coupled to the fixing plate 140 such that the fixing block 150 presses the upper surface of the step 313 or is disposed at a position spaced apart from the upper surface .

The flange 314 is formed on the outer circumferential surface of the housing 310 of the hydraulic cylinder 300 so that the flange 314 is disposed on the upper side of the fixed plate 140 and between the flange 314 and the fixed plate 140 The vibration-proof rubber can be closely contacted with.

4, the flange 314 may protrude horizontally from the outer circumferential surface of the housing 310 so that the flange 314 may be disposed on the upper side of the fixing plate 140 and the flange 314 and the fixing plate 140 can be prevented from transmitting vibration and impact between the base portion 100 and the hydraulic cylinder 300.

[Example 2]

5 is a hydraulic circuit diagram showing a configuration in which a supply pressure control unit is connected to a hydraulic cylinder of a striking base according to the present invention.

The rock strength variable control type test apparatus 1000 for a construction machine attachment according to an embodiment of the present invention is connected to the connection hole 121 of the base unit 100 and is connected to the hydraulic cylinder 300 by hydraulic pressure And a supply pressure control unit 400 capable of controlling the hydraulic pressure supplied to the hydraulic cylinder 300. [

That is, the supply pressure control unit 400 may be connected to the hydraulic cylinder 300 so as to supply the pressurized hydraulic fluid to the hydraulic cylinder 300 so as to adjust the pressure of the supplied hydraulic fluid. At this time, the hydraulic pressure pipe may be connected to the connection hole 121 of the base part 100 of the supply pressure control part 400.

Thus, it is possible to reproduce the rock strength test by regulating the supply pressure of the hydraulic oil supplied to the hydraulic cylinder, and to perform the performance test and the durability test of the construction machine attachment such as the hydraulic breaker. It is also possible to test the stroke control ratio of the hydraulic breaker by adjusting the supply pressure of the operating oil.

Also, the supply pressure control unit 400 includes a hydraulic pump 410; A supply and shutoff valve 420 connected to the hydraulic pump 410 to supply and shut off the pressure fluid supplied to the hydraulic cylinder 300; A pressure regulating valve 430 connected to the supply and shutoff valve 420 to control the supply pressure; And an accumulator (450) installed in a flow path for supplying a pressure fluid between the pressure regulating valve (430) and the hydraulic cylinder (300). . ≪ / RTI >

That is, a hydraulic pump 410 may be provided to pressurize the hydraulic fluid and press-feed the hydraulic fluid to the hydraulic cylinder 300. A supply and shutoff valve (not shown) may be connected to the hydraulic pump 410 to control the supply and shut- 420 may be installed at the rear end of the hydraulic pump 410. A pressure regulating valve 430 for regulating the pressure may be installed at the rear end of the supply and cutoff valve 420 and a hydraulic cylinder 300 may be connected to the rear end of the pressure regulating valve 430. At this time, a pressure gauge and a variable relief valve are installed in the flow path branched from the flow path connecting the hydraulic pump 410 and the supply and shutoff valve 420, so that excessive pressure rise can be prevented, and the hydraulic oil connected to the variable relief valve An oil cooler may be installed on the line returned to the main tank. In addition, a check valve may be installed on the flow path connecting the supply and shutoff valve 420 and the hydraulic cylinder 300 to prevent reverse flow. Further, a return flow path that branches from the flow path connecting the check valve and the hydraulic cylinder 300 to return to the main tank may be formed, and the return flow path may be provided with a discharge valve 460 so as not to be returned or returned . A pressure gauge 440 and a pressure switch are provided at the front end of the hydraulic cylinder 300 to measure the supply pressure of the hydraulic oil flowing into the hydraulic cylinder 300. The pressure regulating valve 430 may be formed of a variable relief valve or a pressure regulator. The pressure regulating valve 430 is branched from a flow path connecting the check valve and the hydraulic cylinder 300, Can be installed.

Thus, the pressure of the hydraulic oil supplied to the hydraulic cylinder can be precisely adjusted, the hydraulic oil can be supplied or cut off, and the hydraulic oil filled in the hydraulic cylinder can be discharged to lower the pressure. Further, vibration and shock applied to the hydraulic cylinder can be absorbed by the accumulator 450, thereby preventing the parts constituting the hydraulic circuit and the piping from being damaged.

In addition, the accumulator 450 may be installed in parallel with a plurality of different operating pressures.

In other words, since the pressure of the hydraulic oil supplied to the hydraulic cylinder 300 can be variously adjusted, the pressure of the hydraulic oil supplied to the hydraulic cylinder 300 can be adjusted by the force, The accumulator 450 can absorb the pressure, and a plurality of the accumulators can be installed in parallel with each other, so that the accumulators can be installed at different pressures to absorb shocks and pressures in the hydraulic circuit corresponding to various supply pressures .

The upper portion of the housing 310 of the hydraulic cylinder 300 exposed to the upper side of the base portion 100 and the buffer portion 200 is provided with an inner space communicating with the inner space of the housing 310 corresponding to the upper side of the piston 320 And the air that is compressed between the piston 320 and the rod cover 330 can be discharged to the outside of the housing 310 when the piston 320 rises through the discharge port 312. [ have.

The inlet 311 formed in the housing 310 of the hydraulic cylinder 300 and the connecting hole 211 formed in the wood 210 of the buffer part 200 are connected to seal surfaces And a connection hole 121 formed in the vertical plate 120 of the base part 100 and a connection hole 211 formed in the wood 210 of the wood part 210 and the buffer part 200 A sealing member or the like is also interposed in the contact surface to be connected so that leakage of the operating oil can be prevented.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

1000: Rock-strength variable control type test equipment for construction machine attachment
100: Base portion
110: horizontal plate 120: vertical plate
121: connection hole 130: reinforcing plate
140: fixing plate 150: fixing block
200: buffer
210: Wood 211: Connection hole
220: Sand 230: Elastic member
240: metal plate 250: anti-vibration rubber
300: Hydraulic cylinder
310: Housing
311: Inlet port 312: Outlet port
313: step 314: flange
320: piston 321: rod
330: Road cover
340: striking plate 350: fastening means
360: upper cushion 370: lower cushion
400: Supply pressure control section
410: Hydraulic pump 420: Supply and shutoff valve
430: Pressure regulating valve 440: Manometer
450: accumulator 460: discharge valve

Claims (11)

A base portion formed concavely and opened at an upper side and having a receiving space therein;
A cushioning portion accommodated in the base portion and recessed to correspond to an inner space of the base portion; And
A hydraulic cylinder in which a lower side of the housing is inserted and positioned inside the buffer, and a striking plate is coupled to an upper end of the rod; , ≪ / RTI >
Wherein the buffer includes a wood disposed laterally to surround the housing of the hydraulic cylinder along an inner circumference of the housing,
Wherein the base portion includes a vertical plate formed along an outer surface of the wood,
Wherein an inlet port is formed in a lower portion of the housing of the hydraulic cylinder, and a connection hole is formed in the vertical plate and the wood so as to penetrate the inner side surface and the outer side surface to be connected to the inlet port, the diameter of the connection hole being larger than the diameter of the inlet, The piping is installed at an outer portion of the connection hole formed in the vertical plate to allow the hydraulic oil to flow into the housing through the connection hole through the inlet Characteristics of Rock Strength Variable Control Type Test Apparatus for Construction Machine Attachment.
delete The method according to claim 1,
Wherein an upper cushion is provided at the upper end of the piston and a lower cushion is provided at the lower end of the piston.
The method according to claim 1,
Wherein the upper end of the rod is inserted into the striking plate and the striking plate is coupled to the rod by the fastening means in the lateral direction around the striking plate.
The method according to claim 1,
Wherein the cushioning portion comprises sand, an elastic member, a metal plate, and a vibration-damping rubber disposed inwardly of the wood and below the housing and stacked in order from the lower side to the upper side. Device.
The method according to claim 1,
Wherein the base portion is coupled to the base portion by a fixing plate so as to press the upper end of the cushioning portion.
The method according to claim 6,
Wherein the housing of the hydraulic cylinder has a step formed on an outer circumferential surface thereof and a fixed block is coupled to the fixed plate so as to catch the upper end of the step.
The method according to claim 6,
Wherein the housing of the hydraulic cylinder has a flange formed on an outer circumferential surface thereof and the flange is disposed on the upper side of the fixed plate and a vibration proof rubber is interposed between the flange and the fixed plate so as to be in close contact with each other.
The method according to claim 1,
And a supply pressure control unit connected to the connection hole of the base unit to supply the hydraulic pressure to the hydraulic cylinder and to control the hydraulic pressure supplied to the hydraulic cylinder. .
10. The method of claim 9,
Wherein the supply-
Hydraulic pump;
A supply and shutoff valve connected to the hydraulic pump to supply and shut off the pressure fluid supplied to the hydraulic cylinder;
A pressure regulating valve connected to the supply and shutoff valve to control the supply pressure; And
An accumulator installed in a passage through which pressure fluid between the pressure regulating valve and the hydraulic cylinder is supplied; And a control unit for controlling the rock strength of the rock mass in the construction machine.
11. The method of claim 10,
Wherein the accumulator is installed in parallel with a plurality of different operating pressures.
KR1020160031071A 2016-03-15 2016-03-15 Controlled variable rock strength test equipment for construction machinery attachments KR101791910B1 (en)

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KR102005263B1 (en) * 2018-08-27 2019-10-08 주식회사 액트 Performance measuring apparatus and method for hydraulic breaker by compressible fluid
KR102402772B1 (en) * 2020-10-20 2022-05-26 주식회사 포스코 Jig for centering alignment of high temperature compression test appratus

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JP2007003453A (en) * 2005-06-27 2007-01-11 Hiroshi Kurabayashi Quick load testing machine of pile
KR101353085B1 (en) 2012-09-24 2014-01-20 (주)한뫼테크 Apparatus for testing the breaker
KR101452901B1 (en) 2013-07-08 2014-10-22 한국기계연구원 Apparatus for testing of hydraulic breaker
JP2015001419A (en) * 2013-06-14 2015-01-05 丸善工業株式会社 Striking force determination device

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Publication number Priority date Publication date Assignee Title
JP2007003453A (en) * 2005-06-27 2007-01-11 Hiroshi Kurabayashi Quick load testing machine of pile
KR101353085B1 (en) 2012-09-24 2014-01-20 (주)한뫼테크 Apparatus for testing the breaker
JP2015001419A (en) * 2013-06-14 2015-01-05 丸善工業株式会社 Striking force determination device
KR101452901B1 (en) 2013-07-08 2014-10-22 한국기계연구원 Apparatus for testing of hydraulic breaker

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