WO2018021801A1 - Intelligent hydraulic breaker using proximity sensor and construction equipment comprising same - Google Patents

Abstract

An intelligent hydraulic breaker according to an embodiment of the present invention comprises: a cylinder supplied with hydraulic pressure; a piston contained in the cylinder and moved forward or backward by the hydraulic pressure; a chisel positioned in front of the piston such that the same is struck by the piston, one end of the chisel being positioned inside the cylinder, and the other end thereof being positioned on the front end of the cylinder while being exposed; a main valve for allowing/blocking supply of hydraulic pressure through a long-stroke port and to a short-stroke port, which are formed in the cylinder, thereby controlling the forward or backward movement of the piston; a sensor formed on the cylinder so as to sense the position of the piston inside the cylinder; a solenoid valve having a hydraulic pressure connection with the main valve so as to allow/block supply of hydraulic pressure through the short-stroke port; and a controller for delivering a control signal to the solenoid valve on the basis of a sensing value delivered from the sensor, wherein the controller controls the stroke distance of the piston on the basis of a sensing value obtained when the sensor senses the bottom dead center of the piston, and the sensor may be formed on the cylinder such that, when striking of the chisel by the front end of the piston is followed by movement of the chisel through a striking object, the sensor is positioned within the stroke distance moved by the piston.

Description

Intelligent Hydraulic Breaker Using Proximity Sensor and Construction Equipment Containing It

The present invention relates to an intelligent hydraulic breaker using a proximity sensor and a construction equipment including the same. More specifically, the stroke distance, the hitting distance or the hitting speed is manually or automatically depending on the hitting condition including the rigidity of the hitting ground. The present invention relates to an intelligent hydraulic breaker using an adjustable proximity sensor and construction equipment including the same.

The present invention is the result of the research carried out with the support of the Ministry of Knowledge Economy and the Korea Institute of Industrial Technology Promotion, "Next Generation Construction Machinery Parts Specialized Complex Development Project."

A breaker is a device used to crush a rock or ground by striking a chisel in contact with an object through a reciprocating motion of a piston, and is mounted on a heavy equipment vehicle such as an excavator in a large construction site. Hydraulic attachment forms are mainly used.

Rock crushing work is one of the important factors that determine the work efficiency due to the construction period. Therefore, the conventional breaker has a long stroke mode that increases the stroke distance of the piston so that the impact force is strengthened for hard rock fracture according to the operator's operation, and a shot speed is improved even if the impact force is somewhat sacrificed for soft rock fracture. It is configured to change the stroke mode (short stroke).

However, such a conventional breaker is not only difficult to use in the case of a non-skilled person because the mode selection depends entirely on the discretion of the operator, there is a problem that the operation is cumbersome when frequent mode changes are required.

Accordingly, the present applicant has proposed a technique for a hydraulic breaker or a striking device that can adjust the stroke distance according to the rigidity or state of the ground in order to solve the problem as described above, and as a reference related to the prior art There is a 'hydraulic control valve for a breaker' of Patent No. 10-1332260.

The present invention has been proposed to solve the above problems, and provides an intelligent hydraulic breaker using a proximity sensor in which the stroke distance of the piston is adjusted according to the hitting condition, and construction equipment including the same.

The present invention provides an intelligent hydraulic breaker using a proximity sensor that can be mounted to the sensor in an optimal position when using a plurality of proximity sensors and construction equipment including the same.

The present invention provides an intelligent hydraulic breaker using a proximity sensor that controls the on / off of the solenoid valve by using the return point of the piston to adjust the stroke distance of the piston in multiple stages, and construction equipment including the same.

The present invention provides an intelligent hydraulic breaker using a proximity sensor that can distinguish the rigidity of the ground or rock using one proximity sensor and thus vary the stroke distance of the piston in multiple stages, and construction equipment comprising the same.

The problem to be solved by the present invention is not limited to the above-described problem, the objects that are not mentioned will be clearly understood by those skilled in the art from the present specification and the accompanying drawings. .

Intelligent hydraulic breaker according to an embodiment of the present invention for achieving the above object, the hydraulic pressure is supplied to the cylinder; A piston housed in the cylinder and forward or backward by hydraulic pressure; A chisel positioned in front of the piston to be hit by the piston, one end of which is located inside the cylinder and the other end of which is exposed from the front end of the cylinder; A main valve controlling the forward or backward of the piston by controlling the hydraulic pressure connected to the long stroke port and the short stroke port formed in the cylinder; A sensor formed in the cylinder to sense a position of the piston in the cylinder; A solenoid valve connected to the main valve and hydraulic pressure to regulate hydraulic pressure connected to the short stroke port; And a controller configured to transmit a control signal to the solenoid valve based on the received sensing value of the sensor, wherein the controller includes a stroke distance of the piston based on a sensing value at which the sensor detects a bottom dead center of the piston. And the sensor may be formed in the cylinder such that the front end of the piston strikes the chisel and the piston moves within a stroke distance when the chisel moves through the hitting object.

The sensor may be formed in the cylinder to be positioned between the long stroke port and the short stroke port.

The sensor is a plurality of proximity sensors, one of the proximity sensor is provided near the long stroke port, the other is provided near the short stroke port and the other is the long stroke port and the short stroke port Can be provided between.

The proximity sensor provided near the long stroke port of the proximity sensor detects hard rock of the hitting object, and the proximity sensor provided near the short stroke port detects soft rock of the hitting object, and the long stroke port and the short stroke port Proximity sensors provided in between can detect the heavy cancer of the hitting object.

The sensor may be a single proximity sensor formed in the cylinder, and the controller may determine the state or the strike condition of the hitting object based on the time duration of the sensing value at which the proximity sensor detects the large diameter portion of the piston.

The proximity sensor may be formed in the cylinder such that the piston is located at one side of the lower edge of the large diameter portion adjacent to the front end of the piston in the large diameter portion of the piston while the piston is in contact with the chisel.

The controller may determine the state or the strike condition of the hitting object from the duration of the ON or OFF state of the proximity sensor, and may determine that the longest duration is soft rock, the shortest is hard cancer, and the middle time is medium cancer.

The controller may be configured to determine the state or rigidity of the hitting object depending on whether the proximity sensor of a plurality of the proximity sensors is turned on when the chisel first penetrates the hitting object while the piston descends to contact the chisel. After the piston is raised, the solenoid valve may be turned on or off according to the required size of the lowering stroke of the piston, and the solenoid valve may be turned on when the hitting object is not hard rock.

The controller may control the stroke size when the piston descends by adjusting the ON / OFF state or duration of the solenoid valve when the hitting object is not hard rock.

The controller may control the stroke size when the piston descends by combining the ON / OFF state of the solenoid valve and the ON / OFF state of the main valve when the hitting object is not hard rock.

The controller may control the stroke size in multiple stages when the piston descends by adjusting the conversion speed or frequency of the ON / OFF state of the solenoid valve when the hitting target is not hard rock.

The controller may control the time required for the lowering of the piston to be shorter than the time required for the ascending when the piston descends while hitting the chisel.

On the other hand, the present invention, the intelligent hydraulic breaker; And an excavator equipped with the intelligent hydraulic breaker.

Intelligent hydraulic breaker using a proximity sensor according to the present invention and construction equipment including the same, it is possible to automatically adjust the stroke distance or the size of the piston in accordance with the rigidity of the object or the impact conditions.

Intelligent hydraulic breaker using a proximity sensor according to the present invention and construction equipment including the same, when using a plurality of proximity sensors can provide the optimum position that can be mounted proximity sensor.

Intelligent hydraulic breaker using a proximity sensor according to the present invention and construction equipment including the same, multi-stage the stroke of the piston by controlling the on / off of the solenoid valve using the return point of the piston to adjust the stroke distance of the piston in multiple stages Can be controlled by

Intelligent hydraulic breaker using a proximity sensor according to the present invention and construction equipment comprising the same, even if only one proximity sensor is used to distinguish the rigidity of the ground or rock and accordingly can maintain the piston stroke distance in multiple stages It can improve maintenance convenience and reduce manufacturing cost or operating cost.

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

1 is a view showing the construction equipment according to an embodiment of the present invention.

2 is an exploded perspective view of an intelligent hydraulic breaker according to an embodiment of the present invention.

3 is a hydraulic circuit diagram of an intelligent hydraulic breaker according to an embodiment of the present invention.

4A and 4B are views for explaining the proximity sensor position of the intelligent hydraulic breaker according to an embodiment of the present invention.

5 is a view for explaining a process of determining the hitting object according to the position of the piston and the sensing value of the proximity sensor of the intelligent hydraulic breaker according to an embodiment of the present invention.

6a to 6c and 7 are views for explaining the positional relationship between the solenoid valve operation and the piston of the intelligent hydraulic breaker according to an embodiment of the present invention.

8 is a hydraulic circuit diagram of an intelligent hydraulic breaker according to another embodiment of the present invention.

9A to 9C are views for explaining the relationship between the piston position and the proximity sensor of the intelligent hydraulic breaker according to FIG. 8.

10A to 10C are views showing signals of a proximity sensor according to the piston position of the intelligent hydraulic breaker according to FIG. 8.

FIG. 11 is a block diagram illustrating a schematic configuration of a controller of the intelligent hydraulic breaker according to FIG. 8.

12 is a flow chart for explaining the operation of the intelligent hydraulic breaker according to FIG.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention; However, the present invention is not limited or limited by the embodiments. Like reference numerals in the drawings denote like elements.

1 is a schematic diagram of construction equipment 100 equipped with an intelligent hydraulic breaker 1000 in accordance with one embodiment of the present invention. Construction equipment 100 according to an embodiment of the present invention is equipment for performing a blow operation on the object. The construction equipment 100 for the impact work may be implemented in a form in which the intelligent hydraulic breaker 1000 is mounted as an attachment to a heavy-duty vehicle such as an excavator.

Intelligent hydraulic breaker 1000 is a device that performs the operation of hitting the object. Representative examples of the intelligent hydraulic breaker 1000 may be a hydraulic breaker (crushing rock) or a hydraulic hammer (hydraulic hammer) to press the pile (pile). Of course, the intelligent hydraulic breaker 1000 in the present invention is not limited to the above-described examples, it should be understood as a concept encompassing all other types of hitting device that performs a function of hitting the object in addition to the hydraulic breaker or hydraulic hammer.

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

The carrier 120 may be largely divided into a driving body 121 and a rotating body 122. The traveling body 121 is mainly provided in a crawler type or a wheel type, and in some cases, 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 in the vertical direction.

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

The connection member 123 is mainly two or more members are fastened in a link manner, connected to the hydraulic cylinder 1430 may be bent or stretched by the expansion and contraction of the hydraulic cylinder 1430, stretching operation and the like. . The connection member 123 may position the intelligent hydraulic breaker 1000 attached to the end by the operation on the hitting object.

In addition, the carrier 120 applies hydraulic pressure to the intelligent hydraulic breaker 1000 so that the mounted intelligent hydraulic breaker 1000 can operate, or in addition to each part or coupler 140 of the carrier 120 including a boom or an arm. A hydraulic source 160 for supplying hydraulic pressure and a hydraulic tank 160a for storing hydraulic oil are installed.

In addition, a cabin on which the operator rides is provided on the rotating body 122, so that the operator can operate the carrier 120 or the intelligent hydraulic breaker 1000 by using an operation facility such as a handle, a lever, or a button in the cabin.

In addition, the carrier 120 may include an outrigger (not shown) for stably fixing the construction equipment 100 to the ground or a counter weight (not shown) for stabilizing the balance of the construction equipment 100.

2 and 3, the intelligent hydraulic breaker 1000 may include a mounting bracket 1200, a housing 1410, and a chisel 1600. The housing 1410 is a site for generating a striking force in the intelligent hydraulic breaker 1000, and has a cylinder 1430 and a piston 1440 accommodated in the cylinder 1430 therein to be applied to the hydraulic pressure applied from the hydraulic source 160. As a result, the piston 1440 reciprocates to generate a striking force. The chisel 1600 is a portion directly hitting a hitting object such as ground or rock, and the front end of the housing 1410 so that its rear end is hit by the front end of the piston 1440 when the piston 1440 is extended (in the following description) The direction in which the piston 1440 is advanced (extended) is defined as the front, and the direction in which the piston 1440 is reversed (reduced) is defined as the rear.

The mounting bracket 1200 is coupled to the rear end of the housing 1410 and serves as a connection between the carrier 120 and the intelligent hydraulic breaker 1000.

The cylinder 1430 and the piston 1440 may be accommodated in the housing 1410. The piston 1440 is provided in a cylindrical shape, the cylinder 1430 is provided in a hollow cylindrical shape so that the piston 1440 is inserted to reciprocate. The inner wall of the cylinder 1430 is provided with various hydraulic ports for supplying hydraulic pressure to the interior of the cylinder 1430 or for discharging the hydraulic pressure from the interior of the cylinder 1430. The piston 1440 is provided with at least two large diameter portions 1442 and 1444 and a small diameter portion 1446 therebetween along the longitudinal direction of the piston 1440. As the hydraulic pressure applied into the cylinder 1430 through the hydraulic port acts on the stepped surfaces 1442a and 1444a formed by the large diameter portions 1442 and 1444, the piston 1440 reciprocates back and forth in the cylinder 1430. To do.

Therefore, according to the proper design of the stepped surfaces (1442a, 1444a) of the hydraulic port or the piston 1440 formed in the cylinder 1430, it is possible not only to reciprocate the simple piston 1440 but also to control the stroke distance of the piston 1440. There is a detailed description thereof will be described later.

The front head 1450 and the head cap 1420 are connected to the front and rear ends of the cylinder 1430, respectively. The front head 1450 is provided with a chisel pin (not shown) on which the chisel 1600 is placed, and the chisel 1600 is hit by the front end of the piston 1440 when the piston 1440 is advanced by the chisel pin (not shown). Be placed in the proper position. In addition, the front head 1450 may further include a dust protector (not shown) for preventing foreign matter from entering the cylinder 1430 when the piston 1440 is reciprocated, or a sound absorbing member (not shown) for reducing the impact sound. Can be installed.

The head cap 1420 has a gas chamber (not shown) therein, and the gas chamber imparts an appropriate damping effect to the piston 1440 as the volume thereof is compressed upon retraction of the piston 1440, so that the rear end of the piston 1440 is Prevents collisions.

The head cap 1420, the cylinder 1430, and the front head 1450 are sequentially connected by the long bolts 1402, and the housing 1410 is configured by covering the connecting body. In addition, by inserting the chisel 1600 into the front side of the housing 1410 through the front head (1450) side and hooks to the chisel pin (not shown), by mounting the mounting bracket 1200 to the rear end of the housing 1410 intelligent hydraulic breaker 1000 may be configured.

The configuration or structure of the intelligent hydraulic breaker 1000 described above is only one embodiment of the intelligent hydraulic breaker 1000 according to the present invention, and the intelligent hydraulic breaker 1000 according to the present invention is somewhat different from the above-described configuration or structure. It should be understood that other intelligent hydraulic breakers 1000 having similar functions, although different, are also included.

Hereinafter, an automatic stroke distance adjustment function performed by the intelligent hydraulic breaker 1000 according to an embodiment of the present invention will be described.

In rock crushing operations using hydraulic breakers, a long stroke may be required if the rock is a hard bedrock, and a short stroke may be necessary for a soft bedrock. This is because, in the case of hard rock, high hitting force is required, and in the case of short stroke, it is more advantageous to improve the working speed. In addition, if the hydraulic breaker uses a process larger than the energy required for crushing, the breaker is stressed due to repulsion of residual energy after crushing, and a cavity is generated in the cylinder 1430. This eventually leads to equipment damage, so adjusting the stroke distance is not just for improving work efficiency.

The automatic stroke distance adjusting function according to the embodiment of the present invention can automatically adjust the stroke distance of the piston 1440 according to the hitting condition. For example, when the intelligent hydraulic breaker 1000 is a hydraulic breaker used for rock crushing work, the stroke distance can be adjusted using the hardness of the hitting object as the hitting condition. As another example, in the case where the intelligent hydraulic breaker 1000 is a hydraulic hammer used for driving a pile or pile, the stroke distance may be adjusted based on the striking force required for pressing the pile.

In detail, the automatic stroke distance adjustment function may be performed by first detecting the signal reflecting the hitting condition by the intelligent hydraulic breaker 1000 and determining the hitting condition according to the detected result, and selecting the appropriate stroke mode for the determined hitting condition. . Here, representative examples of the signal reflecting the hitting condition may include vibration generated during the hitting or a distance in which the piston 1440 retreats due to the repulsive force after the hitting. In addition, the volume of the sound generated by the hitting, the piston ( 1440) A forward distance (maximum forward position, bottom dead center) when moving forward may also be used as a signal reflecting a hit condition.

Hereinafter, various examples of the circuit of the intelligent hydraulic breaker 1000 for implementing the automatic stroke distance adjustment function according to the embodiment of the present invention will be described. However, since the hydraulic circuit diagrams described below are merely exemplary for implementing the automatic stroke distance adjustment function, the present invention is not limited thereto, and variations of the circuit diagrams to be described below are also provided without departing from the spirit of the present invention. It should be understood that it belongs to the present invention.

3 is a hydraulic circuit diagram of an intelligent hydraulic breaker according to an embodiment of the present invention.

Referring to FIG. 3, a piston 1440 is inserted into the cylinder 1430, and a chisel 1600 is disposed at the front end of the piston 1440, and the front end of the chisel 1600 is located at the front end of the cylinder 1430. May be arranged to be exposed.

The front large diameter portion 1442 and the rear large diameter portion 1444 are formed in the piston 1440, and the small diameter portion 1446 may be formed between the front large diameter portion 1442 and the rear large diameter portion 1444. The outer diameter of the large diameter is substantially the same as the inner diameter of the cylinder 1430, so that the inside of the cylinder 1430, the front chamber 1431 is formed between the entire cylinder 1430 and the front large diameter portion 1442, the cylinder A rear chamber 1432 may be formed between the rear portion of the 1430 and the rear large diameter portion 1444.

A reverse port 1433 is formed in the front chamber 1431, and the reverse port 1433 may be connected to the hydraulic source 160 through the reverse line 1433a. Hydraulic pressure may be applied to the front chamber 1431 by hydraulic oil flowing from the hydraulic source 160 to the reverse port 1433 via the reverse line 1433a. The hydraulic pressure applied to the front chamber 1431 acts on the stepped surface 1442a of the front large-diameter portion 1442, whereby a reverse force is applied to the piston 1440.

A forward port 1434 is formed in the rear chamber 1432, and the forward port 1434 is connected to the main valve 1460 through the forward line 1434a. The main valve 1460 can be switched to either the forward position 1460-2 or the reverse position 1460-1, and the forward position 1460-2 transfers the forward line 1434a to the hydraulic source. And the forward line 1434a to the hydraulic tank 160a at the reverse position 1460-1.

Accordingly, when the main valve 1460 is converted to the forward position 1460-2, the rear chamber 1432 flows into the forward port 1434 from the hydraulic source 160 through the main valve 1460 and the forward line 1434a through the main valve 1460. Hydraulic pressure may be applied by the working oil to be. The hydraulic pressure applied to the rear chamber 1432 acts on the stepped surface 1444a of the rear large-diameter portion 1444, and forward force is applied to the piston 1440.

In addition, when the main valve 1460 is converted to the reverse position 1460-1, the rear chamber 1432 is connected to the hydraulic tank 160a via the forward line 1434a and the main valve 1460 to move the forward position 1460-1. The hydraulic oil introduced from 2) is discharged to the hydraulic tank 160a.

In this structure, when the stepped surface 1444a of the rear large-diameter portion 1444 has an area larger than the stepped surface 1442a of the front large-diameter portion 1442, the main valve 1460 is converted to the forward position 1460-2. The forward force may be greater than the reverse force so that the piston 1440 may advance. On the contrary, when the main valve 1460 is converted to the reverse position 1460-1, the hydraulic pressure applied from the hydraulic source 160 acts only on the step surface 1442a of the front large diameter portion 1442 so that the piston 1440 may reverse. Can be. As such, as the main valve 1460 is converted to the forward position 1460-2 or the backward position 1460-1, the reciprocating motion of the piston 1440 may be induced.

Position control of the main valve 1460 may be made hydraulic. That is, the main valve 1460 may be a hydraulic valve in which the forward position 1460-2 and the reverse position 1460-1 may be selected according to the input hydraulic signal.

Both ends of the hydraulic main valve 1460 may be provided with a forward action surface 1464 and a reverse action surface 1462 respectively connected to the hydraulic line. Here, the forward action surface 1464 is connected to the forward control line 1464a branched into the long stroke line 1435a and the short stroke line 1434a. Reverse action surface 1462 is also connected to hydraulic source 160 via reverse control line 1462a.

In this structure, the forward acting surface 1464 has an area larger than the backward acting surface 1462, so that when the hydraulic pressure is applied to both the acting surfaces 1462 and 1464, the main valve 1460 moves forward 1460-2. Piston 1440 may be advanced accordingly. On the contrary, if the hydraulic pressure applied from the hydraulic source 160 is applied only to the reverse action surface 1462, the main valve 1460 may be converted to the reverse position 1460-1, and thus the piston 1440 may reverse.

In other words, when at least one of the long stroke line 1435a and the short stroke line 1434a connected to the forward control line 1464a is connected to the hydraulic source 160, the piston 1440 may perform the forward operation. In addition, when both the long stroke line 1435a and the short stroke line 1434a are blocked from the hydraulic source 160, the piston 1440 may perform the reverse operation.

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 reverse port 1433 of the cylinder 1430 to be connected or disconnected from the front chamber 1431 according to the position of the piston 1440.

Specifically, the long stroke port 1435 is disconnected from the front chamber 1431 when the piston 1440 is advanced so that the front large diameter portion 1442 is on the long stroke port 1435 or located ahead of the long stroke. On the contrary, the long stroke port 1435 is connected to the front chamber 1431 when the piston 1440 is reversed and the front large diameter portion 1442 is located behind the long stroke port 1435.

Therefore, when the long stroke port 1435 is connected with the front chamber 1431, the hydraulic pressure from the hydraulic source 160 is reverse line 1433a, the reverse port 1433, the front chamber 1431, the long stroke port 1435. The main valve 1460 may be converted to the forward position 1460-2 by being applied to the forward action surface 1464 via the long stroke line 1435a and the forward control line 1464a.

The short stroke line 1436a may be connected to the short stroke port 1434 formed in the cylinder 1430. The short stroke port 1436 is formed between the forward port 1434 and the reverse port 1433 of the cylinder 1430 to be connected to or disconnected from the front chamber 1431 according to the position of the piston 1440, and the long stroke Rather, it may be formed at a position closer to the reverse port 1433.

Specifically, the short stroke port 1436 is disconnected from the front chamber 1431 when the piston 1440 is advanced so that the front large diameter portion 1442 is on the short stroke port 1434 or located ahead of the short stroke. On the contrary, the short stroke port 1434 may be connected to the front chamber 1431 when the piston 1440 is backward and the front large diameter portion 1442 is positioned behind the short stroke port 1434.

Here, a solenoid valve 1470 may be installed on the short stroke line 1436a to control a short circuit of the short stroke line 1436a. The solenoid valve 1470 may be switched to any one of the long stroke position 1470-1 and the short stroke position 1470-2, and the short stroke line 1436a at the long stroke position 1470-1. ) And the short stroke line 1436a can be connected at the short stroke position 1470-2.

Thus, when the short stroke port 1434 is connected with the front chamber 1431, the hydraulic line 160 retracts the line 1433a, the reverse port 1433, the front chamber 1431, the long stroke port 1435, and the long from the hydraulic source 160. The solenoid valve 1470 may determine whether hydraulic pressure is applied to the forward action surface 1464 via the stroke line 1435a and the forward control line 1464a. At this time, when the solenoid valve 1470 is converted to the short stroke position 1470-2, the short stroke line 1434a is blocked so that the main valve 1460 is reversed by the hydraulic pressure applied through the reverse control line 1462a. Position 1460-1, and when the solenoid valve 1470 is switched to the on position, the main valve 1460 is converted to the forward position 1460-2 by hydraulic pressure applied through the forward control line 1464a. Can be.

As described above, the piston 1440 may perform reciprocating motion in the long stroke mode and the short stroke mode according to the setting change of the solenoid valve 1470.

In the long stroke mode, the solenoid valve 1470 is switched to the long stroke position 1470-1. In this state, when the piston 1440 is advanced, the long stroke port 1435 is blocked by the front large diameter portion 1442 from the front chamber 1431, and the main valve 1460 is converted to the reverse position 1460-1. Hydraulic pressure from the hydraulic source 160 is not transmitted to the stepped surface 1444a of the rear large diameter portion 1444 of the piston 1440 so that the piston 1440 performs the reverse operation.

In this state, when the piston 1440 reverses and the front large diameter portion 1442 passes through the long stroke port 1435, the long stroke port 1435 is connected to the front chamber 1431, and the main valve 1460 is in the forward position. 1460-2, the hydraulic pressure from the hydraulic source 160 is transmitted to the step surface 1444a of the rear large diameter portion 1444 of the piston 1440 so that the piston 1440 performs the forward operation.

At this time, the front large diameter portion 1442 passes through the short stroke port 1434 before passing through the long stroke port 1435, but since the short stroke line 1436a is blocked by the solenoid valve 1470, hydraulic transmission is performed. There is no support.

That is, in the long stroke mode, the forward operation is started based on the position of the front large diameter portion 1442 of the piston 1440 passing through the long stroke port 1435.

On the other hand, in the short stroke mode, the solenoid valve 1470 is switched to the short stroke position 1470-2. In this state, when the piston 1440 is advanced, the short stroke port 1434 is blocked by the front large diameter portion 1442 from the front chamber 1431, and the main valve 1460 is converted to the reverse position 1460-1. Hydraulic pressure from the hydraulic source 160 is not transmitted to the stepped surface 1444a of the rear large diameter portion 1444 of the piston 1440 so that the piston 1440 performs the reverse operation. In this state, when the piston 1440 is reversed and the front large diameter portion 1442 passes through the short stroke port 1434, the short stroke port 1434 is connected to the front chamber 1431 and is shortened by the solenoid valve 1470. Since the stroke line 1436a is connected, hydraulic pressure is applied from the hydraulic source to the forward action surface 1464 of the main valve 1460 to convert the main valve 1460 to the forward position 1460-2, and the hydraulic source 160 The hydraulic pressure from) is transmitted to the step surface 1444a of the rear large-diameter portion 1444 of the piston 1440 so that the piston 1440 performs the forward operation.

That is, in the short stroke mode, the forward operation is started based on the position of the front large diameter portion 1442 of the piston 1440 passing through the short stroke port 1434.

Here, since the long stroke port 1435 is located behind the short stroke port 1434, the start of the forward operation is started earlier in the short stroke mode than in the long stroke mode, and consequently the backward distance of the piston 1440 is reduced. The stroke distance becomes smaller.

As such, the adjustment of the stroke distance may be made by mode selection between the long stroke mode and the short stroke mode, and mode switching is dependent on the solenoid valve 1470. That is, it may be made by the ON / OFF control of the solenoid valve 1470.

The solenoid valve 1470 may automatically convert between the long stroke position 1470-1 and the short stroke position 1470-2 according to the strike condition.

The intelligent hydraulic breaker 1000 according to an embodiment of the present invention may include sensors 2202, 2204, and 2206 to detect a strike condition or a rigidity of the hitting object. The sensors 2202, 2204, and 2206 detect a hitting condition and transmit a signal related to the hitting condition to the controller 180, and the controller 180 transmits a control signal to the solenoid valve 1470 based on the hitting condition to solenoid. The position or ON / OFF of the valve 1470 can be controlled.

Proximity sensors may be used as the sensors 2202, 2204, and 2206. Proximity sensors 2202, 2204, and 2206 may be mounted on the intelligent hydraulic breaker 1000 to detect the position of the piston 1440 upon hitting.

For example, the proximity sensors 2202, 2204, and 2206 may detect the position of the maximum forward position (hereinafter, referred to as 'lower dead center') when the piston 1440 strikes the rock through the chisel 1600. In detail, the proximity sensors 2202, 2204, and 2206 may be inserted into grooves or holes formed in the cylinder 1430 and installed in a direction perpendicular to the reciprocating direction of the piston 1440. Accordingly, the proximity sensors 2202, 2204 and 2206 pass through the small diameter portion 1446 or the large diameter portions 1442 and 1444 through the installation point of the proximity sensors 2202, 2204 and 2206 during the reciprocating motion of the piston. You can detect if you are.

In addition, a plurality of proximity sensors 2202, 2204, and 2206 may be disposed on the cylinder 1430 along the reciprocating direction of the piston 1440. For example, the proximity sensors 2202, 2204, and 2206 may include the first sensor 2202, the second sensor 2204, and the third sensor disposed in order from the side close to the rear end of the cylinder 1430 to the side close to the front end. 2206).

Referring to FIG. 3, three proximity sensors 2202, 2204, and 2206 sequentially disposed from the rear side to the front side of the cylinder 1430 may detect the front large diameter portion 1442. Here, the arrangement of the proximity sensors 2202, 2204, and 2206 is such that the rear stepped surface 1442a of the front large-diameter portion 1442 is disposed by the proximity sensors 2202, 2204, and 2206 when the piston 1440 is in the maximum forward position. It may be arranged to be located near the area. The maximum forward position of the piston 1440 when the intelligent hydraulic breaker 1000 strikes hard rock is formed behind the maximum forward position of the piston 1440 when hitting soft rock. This is because chisels penetrate the hard rock to be weaker than penetrating soft rock. Accordingly, when the proximity sensors 2202, 2204, and 2206 are arranged as illustrated in FIG. 3, the proximity sensors 2202, 2204, and 2206 are sequentially turned on from the first sensor 2202 as the piston 1440 moves forward. For example, the more signals detected by each of the proximity sensors 2202, 2204, and 2206, the closer the hitting object is to hard rock, and the smaller the hitting object is to be closer to soft rock.

Meanwhile, the proximity sensors 2202, 2204, and 2206 may be disposed to detect the rear large diameter part 1444 of the piston 1440. Proximity sensors 2202, 2204, and 2206 may be disposed at positions for detecting the front large diameter portion 1442 when the piston 1440 moves forward and for detecting the rear large diameter portion 1444 when the piston 1440 moves backward. In this case, a plurality of proximity sensors 2202, 2204, and 2206 may be disposed in the cylinder 1430 along the longitudinal direction thereof.

According to the arrangement state of the proximity sensor 2200 as shown in FIG. 3, the striking condition may be determined according to whether the front large diameter portion 1442 is detected by each of the proximity sensors 2202, 2204, and 2206 when the piston 1440 is moved forward. have.

However, the proximity sensors 2202, 2204, and 2206 are not limited to those illustrated in FIG. 3, and may be disposed at various points of the cylinder 1430 as needed.

As described above, in the case where the plurality of proximity sensors 2202, 2204, and 2206 are installed in the cylinder 1430, it is very important to install each proximity sensor in an optimal position. In the case of the present invention, a plurality of proximity sensors (2202, 2204, 2206) for detecting the position of the piston 1140 in the cylinder 1430, the front end of the piston 1440 hit the chisel 1600, the chisel 1600 ) Is preferably formed in the cylinder 1440 such that the piston 1440 is located within a moving stroke distance when traveling through the hitting object.

In other words, the intelligent hydraulic breaker 1000 according to an embodiment of the present invention, the cylinder 1430 is supplied with hydraulic pressure; A piston 1440 accommodated in the cylinder 1430 and moving forward or backward by hydraulic pressure; A chisel 1600 positioned in front of the piston 1440 so as to be hit by the piston 1440, one end of which is positioned inside the cylinder 1430 and the other end of which is exposed at the front end of the cylinder 1430; A main valve 1460 for controlling forward or backward movement of the piston 1440 by intermittent hydraulic pressure connected to the long stroke port 1435 and the short stroke port 1434 formed in the cylinder 1430; Sensors (2202, 2204, 2206) formed in the cylinder (1430) for detecting the position of the piston (1440) in the cylinder (1430); A solenoid valve 1470 connected to the main valve 1460 and hydraulic pressure to regulate the hydraulic pressure connected to the short stroke port 1434; And a controller 180 that transmits a control signal to the solenoid valve 1470 based on the sensed values of the received sensors 2202, 2204, and 2206. The controller 180 includes the sensors 2202, 2204, and 2206. Controls the stroke distance of the piston 1440 based on the sensing value of sensing the bottom dead center of the piston 1440, the sensor (2202, 2204, 2206) the front end of the piston 1440 hit the chisel 1600 The chisel 1600 may be formed in the cylinder 1430 such that the piston 1440 is located within a moving stroke distance when the chisel 1600 passes through the hitting object.

In the intelligent hydraulic breaker 1000 according to the present invention, when the chisel 1600 hits the hitting object of various conditions, the degree to which the chisel 1600 penetrates the hitting object is different, and the proximity sensors 2202, 2204, and 2206 are used. Should be able to detect all positions of the piston 1440 and minimize the shaded area that the sensor does not detect. To this end, when the actual chisel 1600 is in contact with the piston 1440 in the intelligent hydraulic breaker 1000, the piston 1440 hits the chisel 1600 so that the chisel 1600 penetrates the rock, that is, the hitting object. It is best to install a proximity sensor within a range that can detect the movement of the piston 1440 within a stroke distance that can be lowered.

The stroke distance that the piston 1440 hits the chisel 1600 and the chisel 1600 can penetrate the hitting object may vary depending on the capacity of the intelligent hydraulic breaker 1000. The 45-ton machine is about 55 mm and the 50-ton machine Is about 60mm. Therefore, when installing a plurality of proximity sensors (2202, 2204, 2206) to the cylinder 1430, it is necessary to ensure that all the proximity sensors are within the stroke range of 55mm or 60mm. As long as the plurality of proximity sensors 2202, 2204, and 2206 are installed within the above-described stroke distance, the proximity sensors 2202, 2204, and 2206 may operate regardless of whether the proximity sensor 1242 or the rear diameter 1444 are detected.

When installing a plurality of proximity sensors within the stroke distance of the piston 1440, it is possible to accurately detect the state of the hitting object depending on how and where each proximity sensor is disposed. First, a plurality of proximity sensors may be spaced apart at equal intervals within the stroke distance.

As shown in FIG. 3, the plurality of proximity sensors 2202, 2204, and 2206 may be formed in the cylinder 1430 to be positioned between the long stroke port 1435 and the short stroke port 1434. That is, any one of a plurality of proximity sensors 2202, 2204, and 2206 is provided near the long stroke port 1435, the other is provided near the short stroke port 1434, and the other is a long stroke port. 1435 and the short stroke port 1434. 3 illustrates a case in which three proximity sensors 2202, 2204, and 2206 are formed (S1, S2, and S3), and four or more proximity sensors may be installed. When four or more proximity sensors are installed, the rearmost sensor S1 is located near the long stroke port 1435 and the frontmost sensor S3 is located near the short stroke port 1436. The remaining sensors may be located at equal intervals between the two sensors mentioned above.

Referring to FIG. 4A, the use of three proximity sensors 2202, 2204, and 2206 can detect up to four sections, which in turn can control the movement of the piston 1440 in four stages for the conditions of the hitting object. It means that there is. If only the proximity sensors 2202 and S1 located near the long stroke port 1435 detect the piston 1440 and the remaining sensors S2 and S3 do not detect the piston 1440, the hitting object is determined as hard rock. Accordingly, the piston 1440 may be driven to move to the first position. If all of the proximity sensors S1, S2, and S3 detect the piston 1440, it is determined that the hitting object is soft rock, and the piston 1440 is driven to move to the third position accordingly. In the case where the hitting target is a middle rock having a hardness between the hard and soft rocks, only the sensor S1 near the long stroke port 1435 and the sensor S2 in front of the long stroke port 1435 detect the piston 1440. Therefore, the piston 1440 may be driven to move to the second stage position.

As such, the proximity sensor 2202 provided near the long stroke port 1435 among the proximity sensors 2202, 2204, and 2206 senses hard rock among the hitting objects, and the proximity sensor 2206 provided near the short stroke port 1436. ) Detects soft rock among the hitting objects, and the proximity sensor 2204 provided between the long stroke port 1435 and the short stroke port 1436 may detect the heavy rock among the hitting objects.

4B shows three proximity sensors 2202 within a stroke distance in which the chisel 1600 penetrates the hitting object while the piston 1440 is in contact with the chisel 1600 when the intelligent hydraulic breaker 1000 is 50 ton. The optimal location of 2204, 2206 is shown by way of example. For example, the rearmost proximity sensors 2202 and S1 are located at a distance of 8.5 mm from the long stroke port 1435 and the frontmost proximity sensor located near the short stroke port 1434 ( 2206 and S3 may be installed 51 mm apart from the long stroke port 1435, and the proximity sensors 2204 and S2 located in the middle may be installed 31 mm apart from the long stroke port 1435. It is not limited to. As described above, in the case of installing a plurality of proximity sensors, the piston 1440 contacts the chisel 1600 according to the capacity of the intelligent hydraulic breaker 1000, and the chisel 1600 penetrates the hitting object and enters within the stroke distance. Sensors should be installed but preferably located between long stroke port 1435 and short stroke port 1434.

On the other hand, Figure 5 is a view for explaining the process of determining the hitting object according to the position of the piston and the sensing value of the proximity sensor of the intelligent hydraulic breaker according to an embodiment of the present invention, Figures 6a to 6c and 7 is a view for explaining the positional relationship between the solenoid valve operation and the piston of the intelligent hydraulic breaker according to an embodiment of the present invention.

Intelligent hydraulic breaker 1000 according to an embodiment of the present invention has one advantage that it can be driven in multiple stages by automatically adjusting the stroke of the piston 1440 according to the rigidity of the hitting object. To this end, the piston 1440 is lowered in contact with the chisel 1600, the proximity sensor (2202, 2204, 2206) detects the piston 1440 in the process of entering the chisel 1600 through the hitting object to hit the hitting object When the state of the sensing unit and transmits the result to the controller 180, the controller 180 operates the main valve 1460 and the solenoid valve 1470 to control the hydraulic pressure transmitted to the piston 1440 consequently multi-stage operation This becomes possible. At this time, it is necessary to determine whether the solenoid valve 1470 is ON / OFF or control timing of the ON time and the OFF time according to the state of the hitting object, and when the piston 1440 descends, the proximity sensors 2002, 2204, 2206 It may be determined by the sensing value.

Referring to FIG. 5, while the chisel 1600 and the piston 1440 are in contact with each other, the piston 1440 descends to measure the rigidity or state of the object to be hit, and the stroke is raised again according to the state of the object to be hit. Will be determined. For example, if only the sensor S1 is ON and the other two sensors are OFF for the three proximity sensors S1, S2, and S3 sequentially installed from the rear of the cylinder 1430 to the front, the hitting object is hard rock. At this time, the piston 1440 is raised to a long stroke distance to strike the hard rock. On the contrary, when all three sensors are turned on, the hitting object may be called soft rock. At this time, the piston 1440 may rise to the short stroke distance to hit the soft rock, and hit the soft rock while repeatedly rising and falling at high speed. Get ready. When the hitting target is a heavy rock, the two sensors S1 and S2 are turned on, but the other sensor S3 is turned off. As such, the piston 1440 senses the state of the hitting object while descending and drives the piston 1440 in multiple stages according to the result. The multi-stage driving of the piston 1440 is determined by the operation of the solenoid valve 1470. Can be.

6A to 6C illustrate the multi-stage driving of the piston 1440 when the hitting object is hard rock, medium rock, or soft rock. That is, when the strike object is hard rock, medium rock, soft rock, the piston 1440 may be driven in one stage, two stages, and three stages, respectively. FIG. 6A shows that the piston 1440 is sensed only by the sensor S1 when the piston 1440 is lowered when the hitting object is hard rock (stage 1), and when raised, the piston 1440 is raised to the sensor S1 position to strike the hard rock with a long stroke. do. FIG. 6B shows that the piston 1440 is sensed only by the sensors S1 and S2 when the piston 1440 is lowered when the hitting object is the middle arm (two stages). Will be hit. FIG. 6C shows that the piston 1440 is sensed by all of the sensors S1 to S3 when the piston 1440 is lowered when the hitting object is hard rock (stage 1), and when raised, the piston 1440 is raised to the position of the sensor S3 and the light stroke is short stroke. Will hit.

For the multi-stage control of the piston 1440, the controller 180 of the intelligent hydraulic breaker 1000 according to the present invention, the chisel 1600 hits for the first time while the piston 1440 is lowered and in contact with the chisel 1600. When penetrating the object, judging the state or degree of rigidity of the object to be hit according to whether the proximity sensor of the plurality of proximity sensors (2202, 2204, 2206) is turned on, and after the piston 1440 is raised piston 1440 required The solenoid valve 1470 may be turned on or off depending on the size of the lower stroke, and the solenoid valve 1470 may be turned on when the strike object is not hard rock.

Referring to FIG. 7, the piston 1440 measures the state of the hitting object while initially rising and falling, and accordingly as a result, the piston 1440 repeatedly strikes and descends at the stroke distance according to the hitting object during the next lowering. If the hitting object is hard rock, the piston 1440 rises and descends to one section (see FIG. 4A). In the case of hard rock, the solenoid valve 1470 remains OFF and only the main valve 1460 operates to operate the longest long rod. Strike the hitting object.

When it is measured that the hitting object is soft rock, the piston 1440 ascends to the 4th section and repeatedly hits the hitting object while repeatedly lifting at the short stroke distance. For this, the main valve 1460 and the solenoid valve 1470 are All works.

Similarly, even when the hitting target is a heavy rock, both the main valve 1460 and the solenoid valve 1407 operate to drive the piston 1440 with a stroke suitable for the hitting target. That is, except in the case of hard rock, the solenoid valve 1470 is operated. In the case of medium or soft rock, the piston 1440 suitable for the middle rock or soft rock is controlled by adjusting the ON time or the ON holding time of the solenoid valve 1470. Multi-stage drive by the stroke of.

As such, the controller 180 may control the stroke size when the piston 1440 descends by adjusting the ON / OFF state or duration of the solenoid valve 1470 when the hitting target is not hard rock. .

Alternatively, the controller 180 may combine the ON / OFF state of the solenoid valve 1470 and the ON / OFF state of the main valve 1460 when the strike object is not hard rock. Can be controlled in multiple stages.

Alternatively, when the hitting target is not hard rock, the controller 180 may control the stroke size when the piston 1440 descends by adjusting the conversion speed or frequency of the ON / OFF state of the solenoid valve 1470. have.

When the hitting target is hard rock, the solenoid valve 1470 is turned off to operate only the main valve 1460, and the piston 1440 descends by a long stroke. However, when the hitting target is medium or soft rock, the solenoid valve 1470. ) Is turned on to lower the piston 1440 in the middle stroke or the short stroke. At this time, in the case of soft rock, since the solenoid valve 1470 is always kept in the ON state, the piston 1440 can move quickly in a short stroke. In the case of the middle arm, the solenoid valve 1470 is switched to the ON state and the OFF state, so that the piston 1440 can be lowered by the middle stroke.The solenoid valve 14700 can increase or decrease the ON / OFF conversion speed of the middle stroke. The size can be made more varied, and as a result, multi-stage operation of more various sizes is possible.

On the other hand, when the piston 1440 descends while hitting the chisel 1600, the controller 180 may control the time required for the lowering of the piston 1440 to be shorter than the time required for the ascending. Referring to FIG. 7, it can be seen that after the initial first measurement blow, the piston 1440 slowly rises to the stroke distance according to the state of the hitting object, while rapidly descending when the piston descends. As such, when the piston 1440 descends relatively quickly when descending, the piston may hit the object with a greater hitting force.

Up to now, the use of a plurality of proximity sensors to control the piston in multiple stages according to the state of the hitting object has been described. Therefore, the piston can be controlled in multiple stages. This will be described below with reference to the drawings.

8 is a hydraulic circuit diagram of an intelligent hydraulic breaker according to another embodiment of the present invention, Figures 9a to 9c is a view for explaining the relationship between the piston position and the proximity sensor of the intelligent hydraulic breaker according to Figure 8, Figures 10a to 10c 8 is a view showing a signal of a proximity sensor according to the piston position of the intelligent hydraulic breaker according to Figure 8, Figure 11 is a block diagram showing a schematic configuration of the controller of the intelligent hydraulic breaker according to Figure 8, Figure 12 is an intelligent according to Figure 8 A flowchart for explaining the operation of the hydraulic breaker.

Referring to FIG. 8, a single proximity sensor 3202 is formed in the cylinder 1430. Here, the proximity sensor 3202 detects the large diameter portions 1442 and 1444 of the piston 1440 when the piston 1440 descends, and senses that the proximity sensor 3202 detects the large diameter portions 1442 and 1444. The controller 180 may determine the state or the hitting condition of the hitting object based on the time duration of the value. That is, unlike the case of FIG. 3, in the case of FIG. 8, the single proximity sensor 3202 is not used as a sensing value when the piston 1440 is lowered, but the single proximity sensor 3202 is used as the sensing value. There is a difference in detecting large diameter portions 1442 and 1444 and using the duration of the detection state as a sensing value.

The single proximity sensor 3202 has a large diameter portion 1442 adjacent to the front end of the piston 1440 among the large diameter portions 1442 and 1444 of the piston 1440 while the piston 1440 is in contact with the chisel 1600. It may be formed in the cylinder 1430 to be located on one side of the lower edge. However, the position of the proximity sensor 3202 is not necessarily at one side of the lower edge of the front large diameter portion 1442, but may be formed at one side of the lower edge of the rear large diameter portion 1444, and the large diameter portions 1442 and 1444. It may be formed on one side of the upper edge.

When the proximity sensor 3202 is formed at one side of the lower edge of the rear large diameter portion 1442 as shown in FIG. 8, when the piston 1440 is lowered, the proximity sensor 3202 is turned on by detecting the large diameter portion 1442. The controller 180 may detect the time that the ON state of the proximity sensor 3202 lasts to drive the piston 1440 in multiple stages according to the hitting object.

9A to 9C illustrate a sensing value of the proximity sensor 3202 as the piston 1440 descends when a single proximity sensor 3202 is installed at one side of the lower edge of the rear large diameter portion 1442 of the piston 1440. 10 is a graph illustrating a change in time of a proximity sensor signal for each state.

FIG. 9A illustrates a case in which the hitting target is hard rock. Since the distance at which the piston 1440 descends is short, the proximity sensor 3202 detects the rear large diameter portion 1442 and the ON state is short (see FIG. 10A). . FIG. 9B illustrates a case in which the hitting object is a heavy rock, and since the piston 1440 descends longer than the hard rock, the proximity sensor 3202 detects the rear large-diameter portion 1442 so that the ON state is longer than the hard rock (FIG. 10b). 9C illustrates a case in which the hitting object is soft rock, the proximity sensor 3202 detects the rear large-diameter portion 1442 so that the ON state lasts the longest time (see FIG. 10C).

9A to 9C and 10A to 10C, a single proximity sensor 3202 detects the large diameter portions 1442 and 1444 to determine the state of the hitting object from the time that the ON state is maintained, and multiply the piston 1440. In this case, the single proximity sensor 3202 may detect the small diameter portion 1446 of the piston 1440. When the proximity sensor 3202 detects the small diameter portion 1446, the piston 1440 descends to determine the length of time that the OFF state of the proximity sensor 3202 lasts, thereby determining the length of the piston 1440 according to the hitting object. The movement can be controlled in multiple stages.

As such, the controller 180 determines the condition or the hitting condition of the hitting target from the duration of the ON or OFF state of the single proximity sensor. If the duration is the longest, soft rock, the minimum is the hard rock, and the duration is the middle cancer. Judging by

As shown in FIG. 11, the controller 180 may include a micro control unit (181), a power supply unit 182, a communication unit 183, a solenoid valve control unit 1884, and a sensor signal input unit 185. have.

The controller 180 illustrated in FIG. 11 may correspond to both the controller 180 of FIGS. 3 and 8. The sensor signal input unit 185 receives sensing values of the proximity sensors 2202, 2204, 2206, and 3202, which are transmitted to the MCU 181 to determine whether the piston 1440 is driven in multiple stages. The value determined by the MCU 181 may be transferred to the solenoid valve control unit 184 to control whether the solenoid valve 1470 is ON / OFF or the ON / OFF state change time to control the multi-stage driving of the piston 1440. .

In addition, the signal of the proximity sensors 2202, 2204, 2206, and 3202 may be received by wire or wirelessly through the communication unit 183. As a wireless communication method, all known wireless communication methods may be used.

FIG. 12 illustrates a method of controlling the driving of the piston 1440 when using a single proximity sensor 3202 as in the case of FIG. 8. Referring to FIG. 12, first, the proximity sensor 3202 detects that the piston 1440 is lowered (S110). When the piston 1440 is lowered, the ON signal of the proximity sensor 3202 is input to the controller 180 by the rear large diameter portion 1442 (S120). The controller 180 calculates a width of the ON signal of the proximity sensor 3202 (S130). By this calculation, it is possible to know the time duration of the ON state of the proximity sensor 3202 and determine the length of the duration to determine the strength of the rock, that is, the hitting object (S140). The controller 180 calculates the ON timing of the solenoid valve 1470 according to the strength determination result of the hitting object (S150). That is, if the hitting object is hard rock, the solenoid valve 1470 is maintained in the OFF state, but in the case of medium or soft rock, the solenoid valve 1470 is turned on. do.

After calculating the ON time of the solenoid valve 1470, the piston 1440 is raised to strike the stroke according to the strength of the hitting object (S160). The controller 180 turns on the solenoid valve 1470 according to the strength of the hitting object while the piston 1440 is rising (S170). The process of turning ON the solenoid valve 1470 is as shown in FIG. The solenoid valve 1470 is turned on and the main valve 1460 is switched to control the rising or falling of the piston 1440 (S180). Finally, after the piston 1440 is raised to the stroke stroke, the piston 1440 is lowered to hit the hitting object (S190).

As described above, in one embodiment of the present invention has been described by the specific embodiments, such as specific components and limited embodiments and drawings, but this is provided to help a more general understanding of the present invention, the present invention in the above embodiment The present invention is not limited thereto, and various modifications and variations are possible to those skilled in the art. Therefore, the spirit of the present invention should not be limited to the described embodiments, and all the things that are equivalent to or equivalent to the claims as well as the following claims will belong to the scope of the present invention.

The present invention can be used in construction machinery, heavy equipment, fork cranes, excavators and the like.

Claims (13)

1. A cylinder to which hydraulic pressure is supplied;

   A piston housed in the cylinder and forward or backward by hydraulic pressure;

   A chisel positioned in front of the piston to be hit by the piston, one end of which is located inside the cylinder and the other end of which is exposed from the front end of the cylinder;

   A main valve controlling the forward or backward of the piston by controlling the hydraulic pressure connected to the long stroke port and the short stroke port formed in the cylinder;

   A sensor formed in the cylinder to sense a position of the piston in the cylinder;

   A solenoid valve connected to the main valve and hydraulic pressure to regulate hydraulic pressure connected to the short stroke port; And

   And a controller configured to transmit a control signal to the solenoid valve based on the sensed value of the sensor.

   The controller controls the stroke distance of the piston based on a sensing value of the sensor detects the bottom dead center of the piston,

   And the sensor is formed in the cylinder such that the front end of the piston strikes the chisel and the piston moves within the stroke distance that the piston moves as it travels through the hitting object.
2. The method of claim 1,

   And the sensor is formed in the cylinder to be positioned between the long stroke port and the short stroke port.
3. The method of claim 2,

   The sensor is a plurality of proximity sensors, one of the proximity sensor is provided near the long stroke port, the other is provided near the short stroke port and the other is the long stroke port and the short stroke port Being arranged between, intelligent hydraulic breaker.
4. The method of claim 3,

   The proximity sensor provided near the long stroke port of the proximity sensor detects hard rock of the hitting object, and the proximity sensor provided near the short stroke port detects soft rock of the hitting object, and the long stroke port and the short stroke port Proximity sensor provided between the intelligent hydraulic breaker, which detects the heavy of the hitting object.
5. The method of claim 1,

   The sensor is a single proximity sensor formed in the cylinder,

   And the controller determines a state or a hitting condition of the hitting target based on a time duration of the sensing value of the proximity sensor detecting the large diameter portion of the piston.
6. The method of claim 5,

   The proximity sensor is formed in the cylinder so that the piston is located on one side of the lower edge of the large diameter portion adjacent to the front end of the piston of the large diameter portion of the piston in contact with the chisel, intelligent hydraulic breaker.
7. The method of claim 6,

   The controller determines the state or the strike condition of the hitting object from the duration of the ON or OFF state of the proximity sensor,

   Intelligent hydraulic breaker, judging by soft rock if the longest duration, hard rock if the shortest, and medium cancer if the duration is medium.
8. The method of claim 3,

   The controller,

   The state of the hitting object or the degree of rigidity is determined according to whether the proximity sensor of a plurality of the proximity sensor is turned on when the chisel is first penetrating the hitting object while the piston is lowered and in contact with the chisel. An intelligent hydraulic breaker for turning on or off the solenoid valve according to the required down stroke size of the piston after the piston is raised, and turning on the solenoid valve when the object to be hit is not hard rock.
9. The method of claim 8,

   The controller,

   Intelligent hydraulic breaker to control the stroke size when the piston descends by adjusting the ON / OFF state or duration of the solenoid valve when the object is not hard rock.
10. The method of claim 8,

    The controller,

    Intelligent hydraulic breaker for controlling the stroke size when the piston descends by combining the ON / OFF state of the solenoid valve and the ON / OFF state of the main valve when the hitting object is not hard rock.
11. The method of claim 8,

    The controller,

    Intelligent hydraulic breaker for controlling the stroke size when the piston descends by adjusting the conversion speed or frequency of the ON / OFF state of the solenoid valve when the hitting object is not hard rock.
12. The method of claim 8,

    The controller,

    And when the piston descends while hitting the chisel, controlling the time required for the lowering of the piston to be shorter than the time required for the ascending.
13. An intelligent hydraulic breaker according to any one of claims 1 to 12; And

    And an excavator equipped with said intelligent hydraulic breaker.

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