KR101870072B1 - A hydraulic breaker, buffering fluid monitoring system and buffering fluid monitoring method - Google Patents

Abstract

The inflow-type breaker according to an embodiment of the present invention includes a cylinder having a plurality of hydraulic ports, a piston reciprocating in the cylinder by the hydraulic pressure of the hydraulic oil flowing in or out through the hydraulic port, A buffer for detecting movement of the piston, a pressure sensor for sensing pressure information on the buffer when the piston is moved on the buffer, and a controller for determining whether or not the buffer is leaking the buffer based on the sensed pressure information, And a transmission module for outputting the pressure information to a controller that performs a warning operation when it is determined that the fluid has leaked.

Description

Technical Field [0001] The present invention relates to a hydraulic breaker, a buffer fluid monitoring system, and a buffer fluid monitoring method.

The present invention relates to a hydraulic breaker, a cushioning fluid monitoring system, and a cushioning fluid monitoring method, and more particularly, to a hydraulic breaker, a cushioning fluid monitoring system, and a cushioning fluid monitoring method for monitoring leakage of a cushioning fluid will be.

A breaker is a device used for crushing rocks by striking a chisel that touches an object through a reciprocating motion of the piston. In a large construction site, a hydraulic attachment type mounted on a heavy equipment vehicle such as an excavator is mainly used .

Rock crushing work is one of the important factors in the work speed due to the construction period and so on. Accordingly, the conventional breaker has a long stroke mode in which the stroke distance of the piston is lengthened so as to enhance the hitting force for crushing and carcass destruction according to the operation of the operator, and a long stroke mode in which the hitting speed is improved And is configured to change the short stroke mode.

On the other hand, a shock absorber using a buffer fluid is installed in the breaker to buffer the movement of the reciprocating piston on the cylinder.

The buffer fluid is liable to leak due to scratches and cracks generated in the piston or cylinder.

When the piston continues to reciprocate in a state in which the buffer fluid is leaked, there is a problem that the buffering function of the buffer part falls and the piston or the cylinder is damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a hydraulic breaker, a cushion fluid monitoring system, and a system for detecting leakage of a cushioning fluid and informing a user of the leakage of the cushioning fluid, And a buffer fluid monitoring method.

It is to be understood that the present invention is not limited to the above-described embodiments and that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the following claims .

According to one aspect of the present invention, there is provided a hydraulic control apparatus for an internal combustion engine, comprising: a cylinder having a plurality of hydraulic ports; a piston reciprocating in the cylinder by hydraulic pressure of hydraulic oil flowing in or out of the hydraulic port; A pressure sensor for sensing pressure information on the buffer when the piston is moved on the buffer, and a controller for determining whether the buffer fluid leaks out of the buffer based on the sensed pressure information, A hydraulic breaker including a transmission module that outputs the pressure information to a controller that performs a warning operation may be provided.

According to an aspect of the present invention, there is provided a hydraulic control apparatus for an internal combustion engine, comprising: a cylinder having a plurality of hydraulic ports; a piston reciprocating in the cylinder by hydraulic pressure of hydraulic oil flowing in or out of the hydraulic port; A buffer fluid monitoring system for monitoring a buffer fluid leakage of a hydraulic breaker having a buffer that absorbs shock and pressure is provided on the inner surface of the buffer and detects pressure information on the buffer when the piston is moved on the buffer A buffer fluid monitoring system may be provided that includes a controller that determines that leakage of the buffer fluid has occurred and performs a warning operation when a predetermined condition is satisfied based on the pressure sensor and the sensed pressure information.

According to one aspect of the present invention, there is provided a method of controlling a piston, comprising: a step of striking an object with a chisel in accordance with a reciprocating movement of the piston in the cylinder; a pressure sensor provided on the inner surface of the shock- Sensing the pressure information on the buffer when moving on the buffer, and performing a warning operation when it is determined that leakage of the buffer fluid has occurred when the controller satisfies a predetermined condition based on the sensed pressure information A buffer fluid monitoring method may be provided.

It is to be understood that the solution of the problem of the present invention is not limited to the above-mentioned solutions, and the solutions which are not mentioned can be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

According to the hydraulic breaker, the cushioning fluid monitoring system, and the cushioning fluid monitoring method according to an embodiment of the present invention, when leakage of the cushioning fluid is detected and the cushioning fluid is leaked, The breaking of the breaker can be prevented.

The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned can be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

1 is a schematic view of a construction equipment including a hydraulic breaker according to an embodiment of the present invention.
2 is a schematic view of a hydraulic breaker according to an embodiment of the present invention.
3 is an exploded perspective view of a hydraulic breaker according to an embodiment of the present invention.
4 is a circuit diagram of a hydraulic breaker according to an embodiment of the present invention.
5 is a schematic view showing an installation position of a pressure sensor according to an embodiment of the present invention.
6 and 7 are views illustrating pressure information characteristics sensed by a pressure sensor according to an embodiment of the present invention.
8 is a schematic block diagram of a cushioning fluid monitoring system according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of known configurations or functions related to the present invention will be omitted when it is determined that the gist of the present invention may be blurred.

According to one aspect of the present invention, there is provided a hydraulic system comprising: a cylinder having a plurality of hydraulic ports; A piston reciprocating in the cylinder by hydraulic pressure of hydraulic oil flowing into or out of the hydraulic port; A buffer for buffering movement of the piston using a buffer fluid; A pressure sensor for sensing pressure information on the buffer when the piston is moved on the buffer; And a transmission module for determining whether the buffer fluid leaks from the buffer based on the sensed pressure information and outputting the pressure information to a controller for performing a warning operation when it is determined that the buffer fluid has leaked, Can be provided.

The pressure sensor and the transmission module may be provided on the inner surface of the cushioning portion and may be provided with a hydraulic breaker that is disconnected from the outside of the cushioning portion.

The hydraulic breaker may further include a position sensor disposed on the inner surface of the cushioning portion and sensing position information of the piston moved on the cushioning portion.

Further, a hydraulic breaker installed on the inner surface of the cushioning part and capable of being electrically charged with power to supply electric power to the pressure sensor, the transmission module or the position sensor may be provided.

According to another aspect of the present invention, there is provided a hydraulic control apparatus for an internal combustion engine, comprising: a cylinder having a plurality of hydraulic ports; a piston reciprocating in the cylinder by hydraulic pressure of hydraulic oil flowing in or out of the hydraulic port; The present invention relates to a cushioning fluid monitoring system for monitoring a cushioning fluid leakage of a hydraulic breaker having a cushioning portion for cushioning a cushioning portion of the cushioning portion, A pressure sensor for sensing a pressure of the fluid; And a controller for determining that leakage of buffer fluid has occurred and performing a warning operation when a predetermined condition is satisfied based on the sensed pressure information.

The predetermined condition may be a buffer fluid monitoring system in which the maximum pressure of the pressure information is a predetermined reference pressure or less.

The predetermined condition may be a buffer fluid monitoring system in which, in a reciprocating state of the piston, the frequency at which the maximum pressure of the pressure information is equal to or lower than the reference pressure is equal to or greater than a predetermined reference frequency.

The predetermined condition may be a buffer fluid monitoring system in which the pressure change value of the pressure information is a predetermined reference pressure change value or more.

The predetermined condition may be a buffer fluid monitoring system in which, in a reciprocating state of the piston, the frequency at which the pressure change value of the pressure information is equal to or greater than the reference pressure change value is equal to or greater than a predetermined reference frequency.

And a position sensor disposed on the inner surface of the cushioning portion and sensing positional information of the piston moved on the cushioning portion, wherein the predetermined condition is a predetermined condition that the piston is positioned on the basis of the cushioning portion The pressure of the pressure information at the position is equal to or less than a predetermined reference pressure.

In addition, the pressure of the pressure information is set such that, at a predetermined position between the uppermost point of the upper end of the piston and the lowermost point of the cushion defined as the upper end of the piston reciprocates within the cushioning portion, A buffer fluid monitoring system can be provided, which is the pressure at which the upper end of the fluid is advanced.

And a position sensor disposed on the inner surface of the cushioning portion and sensing positional information of the piston moved on the cushioning portion, wherein the predetermined condition is a predetermined condition that the piston is positioned on the basis of the cushioning portion A buffer fluid monitoring system may be provided wherein the pressure change value of the pressure information at the position is equal to or greater than a predetermined reference pressure change value

In addition, the pressure change value of the pressure information may be changed at a predetermined position between the uppermost point of the upper end of the piston and the lowermost point of the cushion defined as the upper end of the piston reciprocates in the cushioning portion, A buffer fluid monitoring system may be provided which is a pressure change value when the upper end of the piston advances.

The controller may further include an output module for outputting a video or audio signal, and the controller may be provided with a buffer fluid monitoring system that outputs a warning message through the output module when it is determined that leakage of buffer fluid has occurred.

In addition, the controller may be provided with a buffer fluid monitoring system that stops the reciprocating motion of the piston when it is determined that leakage of the buffer fluid has occurred.

The hydraulic breaker may include a control valve for connecting a hydraulic source and a rear chamber of the cylinder for advancing movement of the piston or a control valve for discharging the hydraulic oil from the rear chamber of the cylinder, The controller may be provided with a buffer fluid monitoring system for controlling the shutoff valve so that the shutoff valve blocks the flow of the hydraulic fluid when it is determined that leakage of the buffer fluid has occurred.

The shut-off valve selectively blocks the flow of the hydraulic fluid to the control valve. When the controller determines that leakage of buffer fluid has occurred, the controller controls the shut- A buffer fluid monitoring system for controlling the valve may be provided.

The controller outputs a warning message through the output module when the maximum pressure of the pressure information is equal to or less than the first pressure and when the maximum pressure of the pressure information is equal to or less than a second pressure smaller than the first pressure, A buffer fluid monitoring system that stops the reciprocating motion can be provided.

A charging unit for charging a buffer fluid on the buffer unit; And a charge valve for selectively implementing and shutting off the fluid connection between the charging unit and the buffer unit, wherein the controller is configured to cause the charging unit to charge the buffer fluid on the buffer after the reciprocating motion of the piston is stopped, And controls the charging valve to block the filling of the buffer fluid on the buffer when the pressure of the pressure information reaches a predetermined buffer pressure due to the filling of the buffer fluid, A fluid monitoring system may be provided.

According to still another aspect of the present invention, there is provided a method of controlling a chisel, comprising: hitting an object with a chisel in accordance with a reciprocating motion of the piston in the cylinder; A pressure sensor provided on the inner surface of the shock absorber for absorbing the movement of the piston using the shock absorbing fluid senses pressure information on the shock absorber when the piston is moved on the shock absorber; And if the controller satisfies a predetermined condition based on the sensed pressure information, determining that leakage of the buffer fluid has occurred and performing a warning operation, a buffer fluid monitoring method may be provided.

FIG. 1 is a schematic view of a construction equipment including a hydraulic breaker according to an embodiment of the present invention, FIG. 2 is a schematic view of a hydraulic breaker according to an embodiment of the present invention, and FIG. Fig. 3 is an exploded perspective view of the hydraulic breaker.

FIG. 4 is a circuit diagram of a hydraulic breaker according to an embodiment of the present invention, and FIG. 5 is a schematic view showing an installation position of a pressure sensor according to an embodiment of the present invention.

FIGS. 6 and 7 are views showing pressure information characteristics sensed by a pressure sensor according to an embodiment of the present invention, and FIG. 8 is a schematic block diagram of a cushioning fluid monitoring system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

First, the term for the direction can be defined as the vertical direction with reference to FIG. 2, FIG. 4, and FIG.

As shown in FIG. 1, for example, the construction equipment 100 is a device for performing a batting operation on an object. The construction equipment 100 for the hitting operation is mainly implemented by attaching the hydraulic breaker 1000 to an heavy equipment vehicle such as an excavator as an attachment.

The hydraulic breaker 1000 is a device that performs an operation to strike an object.

Of course, in the present invention, the hydraulic breaker 1000 is not limited to the above-described example, and other types of striking devices that perform a function of striking an object other than the hydraulic breaker should also be understood.

The hydraulic breaker 1000 may be a heavy duty vehicle, that is, an attachment type mounted on the carrier 120, but is not necessarily so, and may exist in a form independent from the carrier 120, such as a form handled by an operator.

A more detailed description of the hydraulic breaker 1000 will be described later.

The carrier 120 can be largely divided into a traveling body 121 and a rotating body 122.

The traveling body 121 is mainly provided as a crawler type or a wheel type, and in some cases, it may be a crane type or a truck type.

The rotating body 122 is mounted on the traveling body 121 so as to be rotatable with respect to the axis perpendicular to the paper.

The rotating body 122 is provided with a connecting member 123 such as a boom or a arm. The hydraulic breaker 1000 may be detachably attached to the end of the connecting member 123 in such a manner that the hydraulic breaker 1000 is directly fastened in the form of an attachment or fastened through the coupler 140.

The connecting member 123 is mainly composed of two or more members fastened in a linking manner, and can be connected to the cylinder to perform an operation of bending or expanding, a stretching and the like by the expansion and contraction of the cylinder. The connecting member 123 can place the hydraulic breaker 1000 attached to its end by this action on the pita boot.

The hydraulic breaker 1000 is mounted on the carrier 120 so that the hydraulic breaker 1000 can be operated or hydraulic pressure may be applied to each part of the carrier 120 including the boom or the arm or the coupler 140, And a hydraulic tank 160a for storing hydraulic oil may be installed.

A cabin 124 is provided on the rotating body 122 so that the user can control the carrier 120 or the hydraulic breaker 1000 by using a handle, a lever, or a button in the cabin 124 .

Hereinafter, a hydraulic breaker 1000 according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG.

2 and 3, the hydraulic breaker 1000 may include a mounting bracket 1200, a main body 1400, and a chisel 1600, for example. The main body 1400 is a portion for generating a striking force in the hydraulic breaker 1000 and has a cylinder 1430 and a piston 1440 accommodated in the cylinder 1430, As the piston 1440 reciprocates by the hydraulic pressure, a hitting force is generated. The chisel 1600 directly hits the pit bulge and the lower portion of the main body 1400 (the piston 1440 advances (advances) in the following description to the upper side of the main body 1400 so as to hit the lower end of the piston 1440 And defines the upward direction in which the piston 1440 is moved upward (downward).

The mounting bracket 1200 is coupled to the upper end of the main body 1400 and serves as a connection between the carrier 120 and the main body 1400.

The main constituent of the main body 1400 may be a cylinder 1430 and a piston 1440.

For example, the piston 1440 is provided in a cylindrical shape, and the cylinder 1430 may be provided in a hollow cylindrical shape so that the piston 1440 can be inserted and reciprocated.

The inner surface 1437 of the cylinder is provided with various hydraulic ports 1433, 1434, 1435 and 1436 for supplying hydraulic pressure to the inside of the cylinder 1430 or discharging the hydraulic pressure from the inside of the cylinder 1430.

The piston 1440 includes at least a small diameter portion 1446, a first large diameter portion 1444 located on the upper side of the small diameter portion 1446 and a second large diameter portion 1442 located on the lower side of the small diameter portion 1446 .

The hydraulic pressure applied to the inside of the cylinder 1430 through the hydraulic port acts on the stepped surfaces 1444a and 1442a formed by the first large diameter portion 1444 and the second large diameter portion 1442, (1430). ≪ / RTI >

Accordingly, by appropriately designing the stepped surfaces 1444a and 1442a of the hydraulic port and the piston 1440 formed in the cylinder 1430, it is possible to control not only the reciprocation of the simple piston 1440 but also the stroke distance of the piston 1440 have.

The front head 1450 and the buffer 1420 can be connected to the lower and upper ends of the cylinder 1430, respectively.

The front head 1450 is provided with a chisel pin (not shown) to which the chisel 1600 is attached and the chisel 1600 is hammered by the lower end of the piston 1440 by advancing the piston 1440 by a chisel pin (not shown) In a suitable position.

A dust protector (not shown) or a sound absorbing member (not shown) for reducing foreign matter from entering into the cylinder 1430 when the piston 1440 reciprocates is added to the front head 1450 As shown in FIG.

The cushioning portion 1420 has a buffer fluid chamber S therein and the buffer fluid chamber S can impart a proper damping effect to the piston 1440 as the volume thereof is compressed upon retraction of the piston 1440 have.

The buffer part 1420 may be formed with a buffer fluid inlet 1402 through which one side of the buffer part 1420 is inserted to fill the buffer fluid chamber S with a buffer fluid.

Thus, the buffer fluid can be charged into the buffer fluid chamber S through the buffer fluid inlet 1402. [

The cushioning portion 1420 is connected to the upper end of the cylinder 1430. However, the cushioning portion 1420 is not limited to this, and if the cushioning fluid is used to impart the damping effect to the piston 1440, The position, shape, etc., of the installation position can be variously changed.

In addition, for example, the hydraulic breaker 1000 may further include a charging unit 1300 for charging a buffer fluid on the buffer 1420.

The charging unit 1300 may be configured to supply the buffer fluid to the buffer fluid chamber S of the buffer unit 1420.

The charging unit 1300 may be installed in the hydraulic breaker 1000, but it is not limited thereto, and may be installed in the carrier 120.

For example, the charging portion 1300 may be installed in a space between the cover portion 1410 surrounding the cylinder 1430 and the cylinder 1430. [

In addition, for example, the hydraulic breaker 1000 may be provided with a fill valve 1310 to selectively implement and shut off the fluid connection between the filler portion 1300 and the cushioning portion 1420.

For example, the charging valve 1310 may be installed in a path through which the buffer fluid reaches the buffer fluid chamber S from the charging section 1300.

For example, the charging valve 1310 may be installed in the path between the charging portion 1300, the buffer fluid inlet 1402 or the charging portion 1300 and the buffer fluid inlet 1402.

The buffer fluid can not be moved from the charging section 1300 to the buffer fluid chamber S when the charging valve 1310 is in the blocking position and the buffer fluid is discharged from the charging section 1300 when the charging valve 1310 is in the coupling position To the buffer fluid chamber (S).

The structure and structure of the hydraulic breaker 1000 described above are only examples of the hydraulic breaker 1000 according to the present invention, and the hydraulic breaker 1000 according to the present invention is similar to the hydraulic structure of the hydraulic breaker 1000 It should be understood that other striking devices having the function are also included.

A circuit diagram of the hydraulic breaker 1000 according to the embodiment of the present invention will be described with reference to Fig.

4, a piston 1440 is inserted into the cylinder 1430, and a chisel 1600 is disposed below the piston 1440. As shown in FIG.

The piston 1440 may be formed with a small diameter portion 1446, a first large diameter portion 1444 located on the upper side of the small diameter portion 1446 and a second large diameter portion 1442 located on the lower side of the small diameter portion 1446 have.

The first large diameter portion 1444 and the second large diameter portion 1442 may have substantially the same outer diameter as the inner diameter of the cylinder 1430. Accordingly, the lower portion of the cylinder 1430, A front chamber 1431 may be formed between the neck portion 1442 and a rear chamber 1432 may be formed between the upper side of the cylinder 1430 and the first large diameter portion 1444.

A backward port 1433 is formed in the front chamber 1431 and a backward port 1433 can be connected to the hydraulic source 160 through a backward line 1433a.

Accordingly, the hydraulic pressure can be applied to the front chamber 1431 by the operating oil flowing into the backward port 1433 from the hydraulic pressure source 160 through the backward line 1433a.

The hydraulic pressure applied to the front chamber 1431 acts on the step surface 1442a of the second large-diameter portion 1442, and the piston 1440 can be subjected to a backward force.

The rear chamber 1432 is formed with a forward port 1434 and the forward port 1434 can be connected to the control valve 1460 through the forward line 1434a.

The control valve 1460 may be disposed at any one of the forward position 1460-2 or the backward position 1460-1 and the forward position 1460a may be disposed at the hydraulic source 160 And the forward line 1434a can be connected to the hydraulic tank 160a in the backward position 1460-1.

Accordingly, when the control valve 1460 is disposed in the forward position 1460-2, the rear chamber 1432 is supplied with the hydraulic fluid from the hydraulic source 160 through the control valve 1460 and the forward line 1434a to the forward port 1434 The hydraulic pressure can be applied by the operating oil.

The hydraulic pressure applied to the rear chamber 1432 acts on the stepped surface 1444a of the first large diameter portion 1444 and a forward force is applied to the piston 1440. [

When the control valve 1460 is disposed in the backward position 1460-1, the rear chamber 1432 is connected to the hydraulic tank 160a via the forward line 1434a and the control valve 1460, 1460-2, the hydraulic fluid flowing into the rear chamber 1432 is discharged to the hydraulic tank 160a.

In this structure, since the stepped surface 1444a of the first large diameter portion 1444 has an area larger than the stepped surface 1442a of the second large diameter portion 1442, the control valve 1460 is moved to the forward position 1460-2 The forward force is greater than the backward force and the piston 1440 can advance.

Conversely, when the control valve 1460 is disposed in the reverse position 1460-1, the hydraulic pressure applied from the hydraulic pressure source 160 acts on only the stepped surface 1442a of the second large-diameter portion 1442, can do.

As a result, the reciprocating motion of the piston 1440 can be realized as the control valve 1460 is disposed in the forward position 1460-2 or the backward position 1460-1.

In one example, the control of the position of the control valve 1460 may be hydraulic.

That is, the control valve 1460 may be a hydraulic valve in which the forward position 1460-2 and the backward position 1460-1 can be selected in accordance with the input hydraulic pressure signal.

At both ends of the control valve 1460, a forward action surface 1464 and a backward action surface 1462, which are connected to the hydraulic line, respectively, may be provided.

Here, the forward action surface 1464 may be connected to the long stroke line 1435a and the forward control line 1464a which is branched to the short stroke line 1436a.

The reverse working surface 1462 can be connected to the hydraulic source 160 via the reverse control line 1462a.

In this structure, the forward action surface 1464 has an area larger than the backward action surface 1462, so that when both hydraulic surfaces are applied to the both action surfaces, the control valve 1460 can be disposed at the forward position 1460-2 Accordingly, the piston 1440 can advance.

Conversely, when hydraulic pressure applied from the hydraulic pressure source 160 is applied only to the reverse operation surface 1462, the control valve 1460 can be disposed from the advance position 1460-2 to the reverse position 1460-1, (1440) can be reversed.

The long stroke line 1435a is connected to the long stroke port 1435 formed in the cylinder 1430. [ The long stroke port 1435 may be formed between the forward port 1434 and the backward port 1433 of the cylinder 1430 so that the long stroke port 1435 can be connected to or disconnected from the front chamber 1431 according to the position of the piston 1440.

More specifically, the long stroke port 1435 is connected to the front chamber 1431 when the piston 1440 advances and the second large diameter portion 1442 is on the long stroke port 1435 or below the long stroke port 1435, Is disconnected.

The long stroke port 1435 is connected to the front chamber 1431 when the piston 1440 is reversed and the second large diameter portion 1442 is located above the long stroke port 1435.

Accordingly, when the long stroke port 1435 is connected to the front chamber 1431, the hydraulic pressure from the hydraulic pressure source 160 is supplied to the reverse line 1433a, the reverse port 1433, the front chamber 1431, the long stroke port 1435, The long stroke line 1435a and the forward control line 1464a to the forward action surface 1464 so that the control valve 1460 can be disposed at the forward position 1460-2.

The short stroke line 1436a may be connected to the short stroke port 1436 formed in the cylinder 1430. [ The short stroke port 1436 is formed between the forward port 1434 and the backward port 1433 of the cylinder 1430 so that the short stroke port 1436 can be connected to or disconnected from the front chamber 1431 according to the position of the piston 1440, May be formed at a position closer to the backward port (1433) than the port (1435).

More specifically, the short stroke port 1436 is connected to the front chamber 1431 when the piston 1440 advances and the second large diameter portion 1442 is on the short stroke port 1436 or is located forward of the short stroke port 1436. [ The connection is blocked.

The short stroke port 1436 is connected to the front chamber 1431 when the piston 1440 is retracted and the second large diameter portion 1442 is located rearward of the short stroke port 1436.

Here, on the short stroke line 1436a, a shift valve 1470 for controlling the short-circuit of the short stroke line 1436a may be provided.

The shift valve 1470 may be selectively disposed at one of the long stroke position 1470-1 and the short stroke position 1470-2 and the short stroke line 1436a And connects the short stroke line 1436a at the short stroke position 1470-2.

Thus, the long stroke mode and the short stroke mode of the piston 1440 can be determined by the transmission valve 1470. [

The shift valve 1470 is disposed at the short stroke position 1470-2 and the second large diameter portion 1442 is positioned further rearward than the short stroke port 1436 so that the short stroke port 1436 and the front chamber 1431 The hydraulic fluid is supplied to the hydraulic source 160, the reverse line 1433a, the reverse port 1433, the front chamber 1431, the short stroke port 1436, the shift valve 1470 and the forward action surface 1464, Can be reached sequentially.

With this structure, the piston 1440 can selectively perform the reciprocating motion in the long stroke mode and the short stroke mode according to the position of the speed change valve 1470.

For example, the shift valve 1470 may automatically switch between the long stroke position 1470-1 and the short stroke position 1470-2 by the controller 180, Stroke position 1470-1 and the short stroke position 1470-2.

The hydraulic breaker 1000 may further include a shutoff valve 1480 for selectively shutting off the flow of the hydraulic fluid.

The shutoff valve 1480 may be installed in a line where the hydraulic oil is to be moved, and may selectively allow the flow of the hydraulic oil or block the flow of the hydraulic oil.

In one example, the shutoff valve 1480 may allow the flow of hydraulic fluid in the connecting position 1480-2 and may block the flow of hydraulic fluid in the cutoff position 1480-1.

In one example, shutoff valve 1480 is located on advancement control line 1464a and extends from actuating oil or short stroke port 1436, which is moved from long stroke port 1435 to advancement action surface 1464, The flow of the hydraulic fluid to be transferred to the first hydraulic pump may be allowed or blocked.

If the shutoff valve 1480 is disposed in the shutoff position 1480-1 to shut off the flow of hydraulic fluid, hydraulic pressure is not applied to the forward action surface 1464 and the control valve 1460 is in the reverse position 1460- 1) to the forward position 1460-2.

Therefore, the hydraulic fluid is not supplied from the hydraulic pressure source 160 to the rear chamber 1432 by the control valve 1460 in the reverse position 1460-1, so that the reciprocation of the piston 1440 can be stopped.

The installation position of the shutoff valve 1480 is not limited to the above-mentioned position, but may be provided on the backward line 1433a or on the forward line 1434a, for example.

Further, the shutoff valve 1480 may be installed in a line through which hydraulic oil is discharged from the hydraulic pressure source 160. [

In this case, when the shutoff valve 1480 interrupts the flow of the hydraulic oil, the hydraulic oil supply from the hydraulic pressure source 160 to the cylinder 1430 can be shut off.

Hereinafter, a technique of monitoring the buffer fluid leakage to detect leakage of the buffer fluid by using the pressure sensor 150 will be described.

The buffer fluid filled on the buffer fluid chamber S may leak from the buffer fluid chamber S through the gap between the buffer fluid inlet 1402 or the buffer portion 1420 and the piston 1440.

When the buffer fluid leaks, the piston 1440 can not be damped appropriately for the movement to be lifted on the cylinder 1430, and the piston 1440 may be broken.

Further, when the buffer fluid leaks, when the piston 1440 advances, the piston 1440 can not have sufficient acceleration due to the pressure of the buffer fluid.

In order to solve the leakage problem of the buffer fluid, the hydraulic breaker 1000 may be provided with a pressure sensor 150 for sensing pressure information on the buffer fluid on the buffer portion 1420.

For example, the hydraulic breaker 1000 may further include a transmission module (not shown).

For example, the transmitting module may be configured to output pressure information to the controller 180. [

For example, the transmitting module may be configured to receive the pressure information sensed by the pressure sensor 150 from the pressure sensor 150 and to transmit the pressure information to the controller 180.

For example, the transmitting module may output pressure information from the pressure sensor 150 to the controller 180 by wire communication, and may output pressure information from the pressure sensor 150 to the controller 180 by wireless communication.

A typical example of the wireless communication of the transmitting module is Bluetooth (BTLE, BlueTooth Low Energy) or Zigbee. Since the communication between the pressure sensor 150 and the controller 180 does not require a high bandwidth, low power communication such as BTLE or duty ratio may be desirable.

However, the communication method between the controller 180 and the pressure sensor 150 in the present invention is not limited thereto.

The controller 180 can determine whether or not the buffer fluid 1420 leaks the buffer fluid based on the sensed pressure information.

For example, when the controller 180 determines that the buffer fluid has leaked, the controller 180 may perform a warning operation.

For example, the controller 180 is an electronic circuit that processes and computes various electronic signals. The controller 180 receives pressure information or signals from the pressure sensor 150, computes information / data, The breaker 1000 and other components of the construction equipment.

The controller 180 is typically located in the carrier 120, but may be located in the hydraulic breaker 1000.

Also, the controller 180 does not necessarily have to be implemented as a single object.

In some cases, the controller 180 may be implemented with a plurality of controllers 180 that can communicate with each other.

For example, the controller 180 may be partly disposed on the side of the hydraulic breaker 1000 and the other part of the controller 180 may be disposed on the carrier 120, / Wired communication and collaborate to perform its function.

For example, when a plurality of controllers 180 are distributed and arranged, some of them may simply transmit signals or information in a slave type, while others may receive various signals or information in a master type and perform processing / Control may be performed.

The description of the controller 180 will be described in more detail below when describing the scratch monitoring system.

As shown in Fig. 5, for example, the pressure sensor 150 may be installed on the buffer portion 1420. Fig.

For example, the pressure sensor 150 may be installed on the inner surface 1421 of the buffer portion 1420.

Accordingly, the pressure sensor 150 can sense information on the pressure on the buffer fluid chamber S.

Further, for example, the transmission module may be installed on the inner surface 1421 of the buffer portion 1420.

Further, for example, the buffer 1420 may further include a position sensor 200 for sensing position information on the up-and-down movement of the piston 1440.

In one example, the position sensor 200 may be installed on the inner surface 1421 of the cushioning portion 1420.

The buffer 1420 may form a buffer fluid chamber S of sufficient volume between the pistons 1440 and the pressure sensor 150, the position sensor 200, May be installed on the seal (S) but not in contact with the reciprocating piston (1440) on the buffer fluid chamber (S).

The pressure sensor 150, the position sensor 200 and the transmission module may be disconnected from the outside of the buffer portion 1420 in that they are installed on the inner surface 1421 of the buffer portion 1420.

More specifically, if an opening is formed through the buffer 1420 to install the pressure sensor 150, the position sensor 200, and the transmission module, and the pressure sensor 150, In the case of installing the sensor 200 and the transmission module, there is a gap between the pressure sensor 150, the position sensor 200, and the transmission module and the buffer portion 1420 forming the opening, and the buffer fluid flows through the gap Leakage may occur.

To solve this problem, the pressure sensor 150, the position sensor 200 and the entire transmission module can be mounted on the inner surface 1421 of the buffer 1420, that is, on the buffer fluid chamber S And as a result, can be disconnected from the outside of the buffer portion 1420.

Here, the transmitting module can transmit pressure information, position information, and the like to the controller 180 through wireless communication with the controller 180.

A power charging unit 1300 (not shown) capable of wirelessly charging power to supply power to the pressure sensor 150, the transmitting module, or the position sensor 200 is connected to the inner surface 1421 of the buffer unit 1420 Can be installed.

The power charging unit 1300 may supply electric power required by the pressure sensor 150, the transmission module or the position sensor 200 in a wireless or wired manner, and may include a power charging device (not shown) installed outside the charging unit 1300, Power can be supplied in a wireless manner.

As a result, the buffering part 1420 does not need to form a separate opening for arranging and driving the pressure sensor 150, the transmitting module or the position sensor 200, and the pressure sensor 150, the transmitting module, (200) is disconnected from the outside of the buffer part (1420), it is possible to more effectively prevent leakage of the buffer fluid on the buffer fluid chamber (S).

Hereinafter, a buffer fluid monitoring system capable of monitoring leakage of the buffer fluid using the pressure sensor 150 and the controller 180 will be described in more detail.

The cushioning fluid monitoring system is a system that implements monitoring for leakage of the cushioning fluid filled on the cushioning portion 1420 of the hydraulic breaker 1000 described above.

For example, the buffer fluid monitoring system can monitor the occurrence of buffer fluid leakage using the pressure information sensed by the pressure sensor 150 described above. If the monitoring result indicates that the buffer fluid has leaked, a warning operation may be performed.

Here, the buffer fluid monitoring system may include a pressure sensor 150 and a controller 180. When the controller 180 satisfies a predetermined condition based on pressure information sensed by the pressure sensor 150, It can be determined that a fluid leak has occurred and a warning operation can be performed.

The predetermined condition may be a reference condition for determining whether or not the buffer fluid on the buffer portion 1420 has leaked.

For example, the controller 180 can determine that leakage of the buffer fluid occurs when the calculated / converted data based on the pressure information or the pressure information sensed by the pressure sensor 150 satisfy a predetermined condition, It can be determined that leakage of the buffer fluid does not occur when the predetermined condition is not satisfied.

The predetermined condition may be set by the user and may be set based on the pressure information obtained from the pressure sensor 150 in a normal state in which the buffer fluid does not leak and / or in a state in which leakage of the buffer fluid occurs.

In addition, the buffer fluid leakage monitoring system may further include an output module 190 for outputting images or sounds.

The output module 190 may be implemented by, for example, a video output module 190 for mainly outputting images or a voice output module 190 for outputting voice.

Of course, various output devices that convey information to the user besides the two can be employed as the output module 190.

The output module 190 may directly output video or audio to the user, or may include a USB port for transmitting video / audio signals to another device that directly outputs video or audio to the user.

The output module 190 may be configured to output a video or voice to output a warning message to the user about the occurrence of buffer fluid leakage.

For example, the output module 190 may be installed in the breaker 1000 or in the carrier 120.

For example, the controller 180 may control the output module 190 to output a warning message to the user about the occurrence of buffer fluid leakage through the output module 190.

The controller 180 and the output module 190 may be capable of wired communication or wireless communication.

Here, for example, as shown in Fig. 6, the predetermined condition may be a condition that the maximum pressure P4 of the pressure information is equal to or lower than predetermined reference pressures P1 and P2.

For example, the maximum pressure P4 of the pressure information may refer to a pressure P4 having the highest value among the pressures of the buffer fluid chamber S, which is changed in accordance with the reciprocating motion of the piston 1440. [

When the buffer fluid in the buffer fluid chamber S leaks, the maximum pressure P4 of the pressure information becomes low. Therefore, when the maximum pressure P4 of the pressure information is less than or equal to the predetermined reference pressures P1 and P2, The controller 180 can determine that leakage of the buffer fluid has occurred.

The predetermined reference pressures P1 and P2 may be set by the user and may be set based on pressure information obtained from the pressure sensor 150 in a normal state in which the buffer fluid has not leaked and / May be set.

In addition, for example, the predetermined condition may be a condition that the minimum pressure P5 of the pressure information is equal to or lower than the predetermined reference pressure P3.

For example, the minimum pressure P5 of the pressure information may refer to a pressure P5 having a minimum value of the pressure of the buffer fluid chamber S, which is changed according to the reciprocating motion of the piston 1440. [

When the buffer fluid in the buffer fluid chamber S leaks, the minimum pressure P5 of the pressure information becomes low, and therefore when the minimum pressure P5 of the pressure information is less than the predetermined reference pressure P3, 180 can determine that leakage of buffer fluid has occurred.

In addition, for example, the predetermined condition may be a condition that the frequency at which the maximum pressure P4 of the pressure information is equal to or lower than the predetermined reference pressure P1 or P2 is equal to or greater than a predetermined reference frequency in the reciprocating motion of the piston 1440. [

In one example, the pressure change of the pressure information can be repeated in accordance with the reciprocating motion of the piston 1440.

More specifically, when the piston 1440 moves forward in the downward direction on the cylinder 1430, the pressure of the pressure information can be lowered, and when the piston 1440 moves backward in the upward direction on the cylinder 1430 The pressure of the pressure information can be increased and the pressure change of this pressure information can be repeated by the reciprocating motion of the piston 1440. [

Here, when the backward movement of the piston 1440 is repeated three times, the maximum pressure P4 of the pressure information can be sensed repeatedly three times.

When the frequency at which the maximum pressure P4 of the pressure information repeatedly detected is equal to or lower than the predetermined reference pressure P1 or P2 is equal to or greater than the predetermined reference frequency, the controller 180 can determine that the buffer fluid has leaked.

For example, when the predetermined reference frequency is three times and the maximum pressure P4 of the pressure information is detected to be equal to or less than the predetermined reference pressure P1 or P2 at least three times in succession, It can be judged that there is leakage.

In addition, for example, the predetermined condition may be a condition in which, in the reciprocating state of the piston 1440, the frequency at which the minimum pressure P5 of the pressure information is equal to or less than the predetermined reference pressure P3 is equal to or greater than a predetermined reference frequency.

The predetermined reference frequency may be set by the user, and may be set based on the pressure information obtained from the pressure sensor 150 in a normal state in which the buffer fluid does not leak and / or in a state in which leakage of the buffer fluid occurs.

In addition, for example, the predetermined condition may be a condition in which the pressure change value AP of the pressure information is equal to or larger than a predetermined reference pressure change value.

If the buffer fluid leaks, the pressure change value AP of the buffer fluid chamber S can be increased by the up-and-down movement of the piston 1440. [

Therefore, based on the pressure change value AP of the pressure information, the controller 180 can determine whether or not the buffer fluid has leaked.

For example, the pressure change value AP may be the difference between the maximum pressure P4 and the minimum pressure P5, and when the pressure change value AP is equal to or greater than a predetermined reference pressure change value, It can be determined that leakage of the fuel gas has occurred.

The predetermined reference pressure change value may be set by the user or may be set based on the pressure information obtained from the pressure sensor 150 in a normal state in which the buffer fluid does not leak and / have.

In addition, for example, the predetermined condition may be a condition that, in the reciprocating state of the piston 1440, the frequency at which the pressure change value AP of the pressure information is equal to or greater than a predetermined reference pressure change value is equal to or greater than a predetermined reference frequency.

For example, the pressure change of the pressure information can be repeated according to the reciprocating motion of the piston 1440. When the frequency of the reference pressure change value or more of the repeated pressure change value AP detected is equal to or greater than a predetermined reference frequency, 180 may determine that the buffer fluid has leaked.

In addition, for example, the predetermined condition may be a condition that the pressure of the pressure information at a predetermined position where the piston 1440 is located with respect to the buffering portion 1420 is equal to or lower than predetermined reference pressures P1 and P2.

More specifically, the pressure of the pressure information used as a basis for determining whether or not the buffer fluid is leaked may be a pressure when the piston 1440 is positioned at a predetermined position on the buffer 1420.

In one example, the pressure of the pressure information may be a predetermined pressure between the maximum pressure P4 and the minimum pressure P5.

For example, the upper end of the piston 1440 can reciprocate on the buffer fluid chamber S of the buffer portion 1420.

5, the uppermost point K1 of the upper end of the piston 1440 defined by the reciprocating motion of the upper end of the piston 1440 in the cushioning portion 1420 and the uppermost point K1 of the cushioning portion 1420 When the pressure of the pressure information at that time is equal to or lower than the predetermined reference pressures P1 and P2 when the hydraulic pressure is located at a predetermined position K3 between the lowermost point K2 and the lowermost point K2, It can be judged that a leak has occurred.

As shown in FIG. 7, the one-dot chain line may be a signal relating to position information sensed from the position sensor 200 as the piston 1440 reciprocates on the buffer portion 1420. The solid line may be a signal relating to pressure information sensed by the pressure sensor 150. [

In one example, the position of the piston 1440 in FIG. 5 indicates that the top of the piston 1440 has advanced on the cushioning portion 1420 to reach the lowermost point.

Here, the position sensor 200 may not detect the piston 1440.

5, when the upper end of the piston 1440 is retracted on the cushioning portion 1420 to reach the uppermost point K1, the position sensor 200 detects the position of the piston 1440 at a predetermined time point the piston 1440 can be sensed from t1.

7, the signal related to the position information sensed by the position sensor 200 can sense the piston 1440 at a specific time point t1-t2 and can detect the piston 1440 at another specific time point 0-t1, t2-t3, the piston 1440 can not be detected.

Using the positional information, the controller 180 can determine whether the piston 1440 is moving forward or backward at a predetermined point and the position of the piston 1440.

Here, the pressure of the pressure information is a pressure at the uppermost point K1 of the upper end of the piston 1440 defined by the reciprocating motion of the upper end of the piston 1440 in the cushioning portion 1420, May be the pressure at which the top of piston 1440 advances, at a predetermined position K3 between point K2.

The predetermined position K3 between the uppermost point K1 of the upper end of the piston 1440 and the lowermost point K2 of the cushioning portion 1420 is such that the position sensor 200 moves the piston 1440 The position of the piston 1440 at the time t2 when the piston 1440 reaches the predetermined position K3 when the upper end of the piston 1440 advances can be the position at which the pressure sensor 150 May be data used to determine whether or not the pressure P6 sensed by the pressure sensor P6 satisfies a predetermined condition.

The forward movement of the piston 1440 is advanced by the pressure of the cushioning fluid in the cushioning portion 1420 and the operating oil flows into the rear chamber 1432 and the pressure of the operating oil 1440 The controller 180 can more accurately determine the leak of the buffer fluid based on the pressure information at the time when the upper end of the piston 1440 advances.

In addition, for example, the predetermined condition may be a condition that the pressure change value AP of the pressure information at a predetermined position where the piston 1440 is positioned with respect to the cushioning portion 1420 is equal to or larger than a predetermined reference pressure change value .

The pressure change value AP is the difference between the maximum pressure P4 and the pressure P6 at the time t2 at which the upper end of the piston 1440 changes to the position K3 where the upper end of the piston 1440 is not sensed from the position sensor 200 Lt; / RTI >

In addition, for example, the pressure change value AP of the pressure information may be the pressure change value AP when the upper end of the piston 1440 advances at the predetermined position K3.

That is, the pressure change value AP of the pressure information is an instantaneous change rate (slope of the tangent line) at the time point t2 when the upper end of the piston 1440 is advanced to the position K3 where the position sensor 200 is not sensed .

Hereinafter, the function implemented by the controller 180 when the controller 180 determines that leakage of the buffer fluid has occurred has been described in detail.

The controller 180 may output a warning message through the output module 190 when it determines that leakage of buffer fluid has occurred.

In addition, for example, the controller 180 may stop the reciprocating motion of the piston 1440 when it is determined that leakage of buffer fluid has occurred.

6, the controller 180 may output a warning message to the user through the output module 190 when the pressure of the pressure information is equal to or greater than the first pressure P1, The reciprocating movement of the piston 1440 can be stopped when the pressure of the piston 1440 is equal to or less than the second pressure P2 smaller than the first pressure P1.

That is, the controller 180 can inform the user of this fact through the output module 190 when the degree of leakage of the buffer fluid is at the warning level. If the degree of leakage of the buffer fluid is equal to or higher than the warning level, The reciprocating movement of the piston 1440 can be stopped without the need for the piston 1440. [

As a result, the controller 180 can prevent the piston 1440 from being damaged due to leakage of the buffer fluid.

For example, the controller 180 may control the shutoff valve 1480 such that the shutoff valve 1480 blocks the flow of hydraulic fluid when it determines that a scratch has occurred.

For example, if the controller 180 does not control the shutoff valve 1480, the shutoff valve 1480 is in a connected position 1480-2 and the controller 180 controls the shutoff valve 1480 Shutoff valve 1480 may be changed from connection position 1480-2 to shutoff position 1480-1.

In other words, the controller 180 can control the shutoff valve 1480 to change from the connection position 1480-2 to the shutoff position 1480-1, so that the shutoff valve 1480 can control the flow of hydraulic fluid Can be blocked.

As described above, when the shutoff valve 1480 is converted from the connection position 1480-2 to the shutoff position 1480-1 by the control of the controller 180, the control valve 1460 is continuously operated in the backward position As a result, the hydraulic fluid of the hydraulic pressure source 160 can not flow into the rear chamber 1432, so that the reciprocating motion of the piston 1440 may not be realized.

The controller 180 controls the hydraulic source 160 so that the hydraulic source 160 supplies the hydraulic oil to the breaker 1000 and the hydraulic oil 160 supplies the hydraulic oil to the breaker 1000. [ It is possible to control the off state to the OFF state.

That is, when the controller 180 determines that a scratch has occurred, the controller 180 may control the hydraulic source 160 so as to prevent the hydraulic fluid from being supplied to the breaker 1000.

For example, the controller 180 may control the shift valve 1470 to control the reciprocating motion of the piston 1440 when it is determined that leakage of buffer fluid has occurred.

For example, the controller 180 controls the shift valve 1470 to control the piston 1440 to change to the short-stroke state when it is determined that the piston 1440 has leaked the buffer fluid in the long-stroke state And may stop the piston 1440 by controlling the shutoff valve 1480 when it is determined that the piston 1440 has leaked the buffer fluid in the short stroke state.

The controller 180 may sequentially control the speed change valve 1470 and the shutoff valve 1480 so that the piston 1440 changes to the short stroke sequentially when the piston 1440 is in the long stroke and stops again at the short stroke.

The user can recognize that the leakage of the buffer fluid has occurred by changing the reciprocating state of the piston 1440 under the control of the controller 180. [

For example, the warning action of the controller 180 may mean outputting a warning message to the user via the output module 190 and / or changing the reciprocating state of the piston 1440.

Further, the controller 180 may control the charging valve 1310 to charge the buffer 1420 with the buffer fluid.

For example, when the controller 180 determines that leakage of buffer fluid has occurred, the controller 180 stops the reciprocating motion of the piston 1440, and thereafter, the charging unit 1300 stops the reciprocating motion of the piston 1440, When the pressure of the pressure information reaches a predetermined cushioning pressure due to the filling of the cushioning fluid, further cushioning fluid is filled on the cushioning portion 1420 The charging valve 1310 may be controlled to change from the connecting position to the blocking position.

For example, the controller 180 stops the reciprocating motion of the piston 1440 when the pressure of the pressure information is equal to or less than the second pressure P2 without the operator's operation, and controls the charging valve 1310 to a predetermined buffer pressure The buffer fluid can be filled on the buffer portion 1420 until reaching the buffer portion 1420.

The predetermined buffer pressure may be set by the user and may be set based on the pressure information obtained from the pressure sensor 150 in a normal state in which the buffer fluid does not leak and / or in a state in which leakage of the buffer fluid occurs.

Hereinafter, the buffer fluid monitoring method will be described.

The buffer fluid monitoring method includes a step (S10) in which the chisel 1600 strikes an object in accordance with the reciprocating motion of the piston 1440 in the cylinder 1430, a step (S10) of buffering the movement of the piston 1440 using the buffer fluid, (S20) of sensing pressure information on the buffer 1420 when the piston 1440 is moved on the buffer 1420 and the pressure sensor 150 provided on the inner surface 1421 of the controller 1420, (S30) when it is determined that leakage of the buffer fluid has occurred and a warning operation is performed if the predetermined condition is satisfied based on the sensed pressure information.

8, the controller 180 and the pressure sensor 150, the position sensor 200, the shutoff valve 1480, the change-over valve (not shown) The shuttle valve 1480, the shift valve 1470, the charge valve 1310, and the charge valve 1310 under the control of the controller 180, And the output module 190 may be controlled.

The predetermined reference pressures P1, P2, and P3 and predetermined reference pressure change values may be input by the input unit 195 and may be input to the controller 180 in a normal state in which the buffer fluid does not leak and / Or may be set based on the pressure information obtained from the pressure sensor 150 in the state where the leakage of the fluid occurs.

The predetermined reference pressures P1, P2, and P3, predetermined reference pressure change values, and the like can be determined based on the temperature measured from the temperature sensor (not shown), so that the controller 180 can detect a normal state in which the buffer fluid does not leak and / And the pressure information obtained from the pressure sensor 150 in a state where leakage of the buffer fluid has occurred.

The predetermined reference pressures P1, P2, and P3, predetermined reference pressure change values, and the like may be determined on the basis of the temperature of the charger 1300 measured from a temperature sensor (not shown) May be set based on temperature and / or external temperature.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that changes or modifications may fall within the scope of the appended claims.

120: Carrier
1000: Hydraulic breaker
150: Pressure sensor
180: controller
190: Transmission module

Claims (20)

A cylinder having a plurality of hydraulic ports;
A piston reciprocating in the cylinder by hydraulic pressure of hydraulic oil flowing into or out of the hydraulic port;
A buffer for buffering movement of the piston using a buffer fluid;
A pressure sensor for sensing pressure information on the buffer when the piston is moved on the buffer;
A position sensor for sensing position information of the piston moved on the buffer; And
In accordance with the pressure information and the position information, at a predetermined position between an uppermost point of the upper end of the piston and a lowest point of the cushion defined by reciprocating motion of the upper end of the piston in the cushion, And a transmitting module for outputting the pressure information to a controller that performs a warning operation when it is determined that the buffer fluid has leaked based on the pressure at the time of advancing.
Hydraulic breaker.
The method according to claim 1,
Wherein the pressure sensor and the transmission module comprise:
A buffer layer provided on the inner surface of the buffer portion,
Hydraulic breaker.
3. The method of claim 2,
Wherein the position sensor is provided on the inner surface of the buffer portion and is disconnected from the outside of the buffer portion,
Hydraulic breaker.
The method of claim 3,
And a power charging unit installed on an inner surface of the buffer to allow power to be wirelessly charged to supply power to the pressure sensor, the transmission module, or the position sensor.
Hydraulic breaker.
A piston having a plurality of hydraulic ports, a piston reciprocating in the cylinder by the hydraulic pressure of hydraulic oil flowing in or out through the hydraulic port, and a buffer for buffering the movement of the piston using the buffer fluid, A buffer fluid monitoring system for monitoring a buffer fluid leakage of a buffer fluid,
A pressure sensor installed on an inner surface of the cushioning portion and sensing pressure information on the cushioning portion when the piston is moved on the cushioning portion;
A position sensor for sensing position information of the piston moved on the buffer; And
At a predetermined position between the uppermost point of the upper end of the piston and the lowermost point of the cushioning defined by the reciprocating motion of the upper end of the piston in the cushioning portion in accordance with the pressure information and the position information, And a controller for determining that leakage of the buffer fluid has occurred and performing a warning operation when the predetermined condition is satisfied,
Buffer fluid monitoring system.
6. The method of claim 5,
The predetermined condition is that,
Wherein the maximum pressure of the pressure information is equal to or less than a predetermined reference pressure,
Buffer fluid monitoring system.
The method according to claim 6,
The predetermined condition is that,
In the reciprocating state of the piston,
Wherein a condition that the frequency at which the maximum pressure of the pressure information is equal to or lower than the reference pressure is equal to or greater than a predetermined reference frequency,
Buffer fluid monitoring system.
6. The method of claim 5,
The predetermined condition is that,
Wherein the pressure change value of the pressure information is equal to or greater than a predetermined reference pressure change value,
Buffer fluid monitoring system.
9. The method of claim 8,
The predetermined condition is that,
In the reciprocating state of the piston,
Wherein the pressure change value of the pressure information is equal to or greater than the reference pressure change value,
Buffer fluid monitoring system.

6. The method of claim 5,
The predetermined condition is that,
The pressure of the pressure information at the predetermined position is equal to or lower than a predetermined reference pressure,
Buffer fluid monitoring system.
delete 6. The method of claim 5,
The predetermined condition is that,
And a pressure change value of the pressure information at the predetermined position is equal to or greater than a predetermined reference pressure change value,
Buffer fluid monitoring system.
delete 6. The method of claim 5,
And an output module for outputting a video or audio,
The controller includes:
And outputting a warning message through the output module when it is determined that leakage of buffer fluid has occurred,
Buffer fluid monitoring system.
6. The method of claim 5,
The controller includes:
And stopping the reciprocating motion of the piston when it is determined that leakage of the buffer fluid has occurred,
Buffer fluid monitoring system.
16. The method of claim 15,
The hydraulic breaker includes a control valve for connecting the hydraulic source and the rear chamber of the cylinder for forward movement of the piston or for discharging the hydraulic oil from the rear chamber of the cylinder, - < / RTI >
The controller includes:
And the shutoff valve controls the shutoff valve to shut off the flow of the hydraulic fluid when it is determined that leakage of the buffer fluid has occurred.
Buffer fluid monitoring system.
17. The method of claim 16,
The shut-off valve selectively blocks the flow of the hydraulic fluid to the control valve,
The controller includes:
And the shutoff valve controls the shutoff valve to shut off the flow of the hydraulic fluid when it is determined that leakage of the buffer fluid has occurred.
Buffer fluid monitoring system.
6. The method of claim 5,
And an output module for outputting a video or audio,
The controller includes:
Outputting a warning message through the output module when the maximum pressure of the pressure information is equal to or less than the first pressure,
Stopping the reciprocation of the piston when the maximum pressure of the pressure information is equal to or less than a second pressure smaller than the first pressure,
Buffer fluid monitoring system.
19. The method of claim 18,
A charging unit for charging a buffer fluid on the buffer unit; And
Further comprising a charge valve selectively implementing and blocking a fluid connection between the live portion and the buffer,
The controller includes:
After the reciprocating movement of the piston is stopped,
The charging unit controls the charging valve to charge the buffer fluid on the buffer,
And controls the fill valve to prevent the buffer fluid from being filled on the buffer when the pressure of the pressure information reaches a predetermined buffer pressure due to the filling of the buffer fluid.
Buffer fluid monitoring system.
Striking the object with the chisel in accordance with the reciprocating motion of the piston in the cylinder;
A pressure sensor provided on the inner surface of the shock absorber for absorbing the movement of the piston using the shock absorbing fluid senses pressure information on the shock absorber when the piston is moved on the shock absorber;
Sensing position information of the piston by a position sensor provided on an inner surface of the buffer portion;
At a predetermined position between the uppermost point of the upper end of the piston and the lowest point of the cushioning portion defined by the reciprocating motion of the upper end of the piston in the cushioning portion in accordance with the pressure information and the position information detected by the controller, Determining that leakage of the buffer fluid has occurred when the predetermined condition is satisfied, and performing a warning operation based on the pressure when the piston top moves forward;
Method for monitoring buffer fluid.

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