KR102404994B1 - Hydraulic breaker that can determine the inflow of foreign substances - Google Patents

Abstract

As a hydraulic breaker capable of determining the inflow of foreign substances, the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application includes: a cylinder provided with a hydraulic circuit; a piston which reciprocates up and down in the cylinder by the hydraulic pressure provided by the hydraulic circuit; a chisel located under the piston and provided to hit an object by a vertical reciprocating motion of the piston; a housing having an outer wall surrounding the outer periphery of the cylinder and the piston to accommodate the cylinder and the piston in an inner space formed so as to achieve vertical reciprocating motion of the piston and hitting of the chisel; a horizontal displacement detection unit provided in contact with an outer periphery of the chisel to sense the horizontal displacement of the chisel; and a control unit receiving a displacement signal from the horizontal displacement detecting unit.

Description

A hydraulic breaker capable of determining the inflow of foreign substances {HYDRAULIC BREAKER THAT CAN DETERMINE THE INFLOW OF FOREIGN SUBSTANCES}

The present application relates to a hydraulic breaker capable of determining the inflow of foreign substances.

A hydraulic breaker is an attachment device for an excavator. It converts the power source supplied from the hydraulic pump into the reciprocating kinetic energy of the piston to crush rock or concrete, dismantling buildings, receiving piles at foundation construction sites, and performing civil engineering work. It is a blow crushing equipment that crushes various crushing targets by hitting such as pounding the foundation.

The hydraulic breaker has a problem of shortening the lifespan of the product due to the inflow of foreign substances between the chisel and the housing due to the impact crushing operation.

The technology that is the background of the present application is disclosed in Japanese Patent Application Laid-Open No. 6030482.

The present application provides a hydraulic breaker capable of determining the inflow of foreign substances, which is to solve the problems of the prior art described above, to determine the inflow of foreign substances occurring in the gap between the piston and the cylinder, and to provide a signal to the user according to the determined information aim to do

However, the technical problems to be achieved by the embodiment of the present application are not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, a hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application includes: a cylinder provided with a hydraulic circuit; a piston which reciprocates up and down in the cylinder by the hydraulic pressure provided by the hydraulic circuit; a chisel located under the piston and provided to hit an object by a vertical reciprocating motion of the piston; a housing having an outer wall surrounding the outer periphery of the cylinder and the piston to accommodate the cylinder and the piston in an inner space formed so as to achieve vertical reciprocating motion of the piston and hitting of the chisel; a horizontal displacement detection unit provided in contact with an outer periphery of the chisel to sense the horizontal displacement of the chisel; and a control unit receiving a displacement signal from the horizontal displacement sensing unit, wherein the horizontal displacement sensing unit includes: a rotating member provided in direct contact with the chisel so as to be rotatable with respect to the vertical movement of the chisel; A rotating member accommodating portion provided to accommodate the rotating member so that the rotating member is rotatably in contact with the chisel, even when the chisel is maximally spaced apart from the horizontal displacement sensing unit in the horizontal direction, the rotating member holds the chisel a support unit including an elastic member elastically supporting the rotating member to pressurize and an extension member extending outwardly from the outer end of the rotating member receiving unit and interlocking in the horizontal movement and displacement side of the rotating member receiving unit; and a sensing unit provided to sense an amount of horizontal displacement of the rotating member, wherein the elastic member is provided to be interposed in an elastically compressed state between the rotating member accommodating part and the sensing unit, and the sensing unit includes the rotating member The horizontal displacement amount of the rotary member and the horizontal displacement amount of the chisel with which the rotary member is in direct contact are predicted through the detection of the horizontal displacement amount of the rotary member accommodating part for accommodating the horizontal displacement detection unit and a second horizontal axis that is orthogonal to the first horizontal axis, and may be coupled to the housing.

In addition, the housing includes a sensing unit accommodating groove and a hole to be engageable with the horizontal displacement sensing unit, wherein the sensing unit accommodating groove is formed outside the housing outer wall, and the hole is formed inside the housing outer wall, , the hole is connected to the sensing unit accommodating groove, and a female thread is formed on an inner periphery of the sensing unit accommodating groove so that the sensing unit accommodating groove and the sensing unit can be screwed to each other, and corresponding to the sensing unit accommodating groove. A male thread is formed around the support part, and the support part is provided to have a degree of freedom in a non-rotationally constrained state so that the sensing unit is not rotated by interlocking with the sensing unit when it is rotated by screwing with the sensing unit receiving groove, the horizontal displacement sensing When coupled to the housing, the rotating member is in contact with the chisel, the elastic member is coupled to be interposed in an elastically compressed state, the control unit, based on the displacement signal received from the horizontal displacement sensor A determination is made regarding the introduction of foreign substances between the chisel and the housing, and the rotating member is provided with a ball member or a roller member so as to be rotatable according to the vertical reciprocating motion of the chisel, and the chisel and the housing In order to prevent separation of the rotating member, it may be formed to have a diameter equal to or greater than twice the distance between the chisel and the housing.

In addition, the hydraulic breaker further includes a sound detection sensor for detecting a sound generated by friction between the foreign material and the chisel or the housing when a foreign material is introduced into the gap between the chisel and the housing, wherein the control unit includes: , may be determined based on the sound detected by the sound sensor to determine whether a foreign material is introduced between the chisel and the housing, and the sound sensor may be disposed to be spaced apart from the chisel.

In addition, the hydraulic breaker includes an impact sensor for detecting an amount of impact generated between the chisel and the housing when a foreign material is introduced into the gap between the chisel and the housing, and the control unit detects a plurality of the impacts It may be determined that a foreign material has been introduced between the chisel and the housing by receiving the amount of impact from the sensor and taking into account the change in the scalar value of the impact amount.

In addition, the control unit performs a determination related to the inflow of foreign substances using a previously learned and built neural network model, and the neural network model includes horizontal displacement information obtained from the horizontal displacement detection unit, impact amount information obtained from the impact detection sensor, and The neural network model may be a neural network model built in advance using a learning set in which one or more of the sound waveform information obtained from the sound detection sensor is an input value and a determination item related to the inflow of a foreign material is an output value.

The above-described problem solving means are merely exemplary, and should not be construed as limiting the present application. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description.

According to the above-described problem solving means of the present application, the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application includes a horizontal displacement detection unit coupled through the outer wall of the housing, so that the rotating member of the horizontal displacement detection unit is mounted on the chisel By sensing the horizontal displacement of the chisel by contact, it can be determined that a foreign material has been introduced into the gap between the chisel and the housing.

In addition, according to the above-described problem solving means of the present application, the support portion of the horizontal displacement sensing unit includes an elastic member, so that the chisel is biased from the normal position to either side (at least one of biased by horizontal movement and biased by inclination) According to the continuous elastic compression state such as additional elastic compression or more relaxed elastic compression corresponding to the bias caused by The horizontal displacement of the additional chisel may be detected, and accordingly, it may be determined that a foreign material has been introduced into the gap between the chisel and the housing.

In addition, according to the above-described problem solving means of the present application, the housing of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application includes a sensing unit accommodating groove and a hole so that the horizontal displacement sensing unit can be coupled, the sensing unit accommodating groove By being formed to be screw-coupled to the sensing unit, it is possible to prevent the horizontal displacement sensing unit from being separated from the housing due to vibration generated by the vertical reciprocating motion of the piston.

In addition, according to the above-described problem solving means of the present application, the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application includes a shock sensor, so that when foreign substances are introduced into the gap between the chisel and the housing, between the chisel and the housing It can be determined that foreign substances have entered the gap between the chisel and the housing by detecting the amount of impact generated from the chisel.

In addition, according to the above-described problem solving means of the present application, the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application includes a sound sensor, so that when foreign substances are introduced into the gap between the chisel and the housing, the foreign substances and the chisel or It can be determined that a foreign substance is introduced between the chisel and the housing by detecting a sound generated by friction of the housing.

In addition, according to the above-described problem solving means of the present application, the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application includes a control unit, so that when foreign substances are introduced into the gap between the chisel and the housing, the horizontal displacement sensing unit, the impact By detecting an amount of change occurring in at least one of the detection sensor and the sound detection sensor, an operation stop signal, a cleaning signal, or a replacement signal may be provided to the user so that the user may take an action according to the signal.

1 is a conceptual diagram of a hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application.
2 is a conceptual diagram of a horizontal displacement detection unit of a hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application
3 is a conceptual diagram for explaining a state in which the horizontal displacement sensor is coupled to the housing of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application.
4 is a conceptual diagram for explaining the state of the horizontal displacement sensor when a foreign material is introduced into the hydraulic breaker capable of determining the foreign material inflow according to an embodiment of the present application.
5 illustrates a condition (electrically measured if necessary) in which the outer end of the extension member of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application can be mechanically (physically) measured inside the sensing unit. It is a drawing for illustrative purposes.
6 is a view showing the outer end (end point) of the extension member of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application is extended (protruded) to the outside more than the embodiment of FIG. 5 to be exposed to the outside; It is a diagram for explaining another embodiment in which displacement measurement is possible through an additional mechanical connection (electrical connection, if necessary) to the end point.
7 is a conceptual diagram (plan view) for explaining a horizontal displacement detection unit and an impact detection sensor coupled with respect to the first horizontal axis and the second horizontal axis of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present application pertains can easily carry out. However, the present application may be implemented in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is "connected" with another part, this includes not only the case where it is "directly connected" but also the case where it is "electrically connected" with another element interposed therebetween. do.

Throughout this specification, when a member is positioned “on”, “on”, “on”, “on”, “under”, “under”, or “under” another member, this means that a member is positioned on the other member. It includes not only the case where they are in contact, but also the case where another member exists between two members.

Throughout this specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

Hereinafter, a hydraulic breaker (hereinafter referred to as 'this hydraulic breaker') capable of determining the inflow of foreign substances according to an embodiment of the present application will be described.

1 is a conceptual diagram of a hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application.

Referring to FIG. 1 , the hydraulic breaker 100 includes a cylinder 110 , a piston 120 , a chisel 130 , and a housing 140 . For example, the present hydraulic breaker 100 may be applied to an excavator. For example, the hydraulic breaker 100 may be applied for crushing work such as crushing rock, concrete, etc., or dismantling work of a building.

The cylinder 110 may be provided with a hydraulic circuit. For example, a hydraulic circuit of the cylinder 110 may be provided to reciprocate the piston 120 . For example, the hydraulic circuit may supply hydraulic pressure from the inner surface of the cylinder 110 to the inside of the cylinder 110 or discharge the hydraulic pressure from the inside of the cylinder 110 . Since the hydraulic circuit may be provided with various techniques obvious to those skilled in the art, a more detailed description thereof will be omitted.

Also, referring to FIG. 1 , the piston 120 may be provided in the cylinder 110 . In addition, the piston 120 may reciprocate up and down in the cylinder 110 by hydraulic pressure provided by the hydraulic circuit. For example, the vertical reciprocating motion may be a reciprocating motion in the 12 o'clock-6 o'clock direction based on FIG. 1 .

Also, for example, the hydraulic pressure may be hydraulic pressure generated by the hydraulic circuit of the cylinder 110 .

Also, for example, the piston 120 may strike the chisel 130 while performing a vertical reciprocating motion by hydraulic pressure and gas pressure. Also, for example, the piston 120 may be provided in a cylindrical shape.

Also, for example, the piston 120 may convert energy by hydraulic pressure into hitting energy.

Referring to FIG. 1 , the chisel 130 may be located below the piston 120 . In addition, the chisel 130 may be provided to hit the object by the vertical reciprocating motion of the piston 120 . That is, for example, in the present hydraulic breaker 100, when the piston 120 reciprocates up and down in the cylinder 110 by hydraulic pressure, the piston 120 moves up and down while the lower side of the piston 120 is reciprocated. The chisel 130 located in the chisel 130 may be hit, and the hit chisel 130 may hit the object.

Referring to FIG. 1 , the housing 140 includes a cylinder 110 and a piston 120 to accommodate the cylinder 110 and the piston 120 in an internal space formed so that the up-and-down reciprocating motion of the piston 120 and the striking of the chisel 130 are made. An outer wall surrounding the outer periphery of the piston 120 may be provided. For example, in the inner space of the housing 140, the passage for guiding the piston 120 and the chisel 130 is up and down (Fig. 1 standard, 12 o'clock-6 o'clock) may be provided.

For example, referring to FIG. 1 , the housing 140 may accommodate a portion of the chisel 130 in the internal space. For example, a part of the chisel 130 accommodated in the inner space of the housing 140 may be a part including an upper side (based on FIG. 1 , 12 o'clock direction) in contact with the piston 120 , The part of the chisel 130 not accommodated in the internal space may be a part including the lower side (based on FIG. 1, 6 o'clock direction) hitting the object.

For example, the housing 140 may be provided so that the lower side of the inner space formed to be hit by the chisel 130 is opened.

Also, for example, the housing 140 may be provided with a larger diameter than the diameter of the chisel 130 to enable the vertical movement of the chisel 130 , and accordingly, between the housing 140 and the chisel 130 . can have gaps.

Figure 2 is a conceptual diagram of the horizontal displacement detection unit of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application, Figure 3 is a horizontal displacement detection unit coupled to the housing of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application It is a conceptual diagram to explain the appearance.

For example, referring to FIG. 3 , the interval between the housing 140 and the chisel 130 is a contact (adherence) of the chisel 130 to one inner peripheral surface of the inner space (hollow part) in which the chisel 130 is accommodated. ), it can be assumed that a space corresponding to the gap of 2 g is formed on the opposite side, and in this case, when the chisel 130 is centered, a gap of g is created, and g is the housing 140 at this time. It can be said that the interval between the and the chisel (130).

For example, the cylinder 110, the piston 120, the chisel 130 and the housing 140 of the hydraulic breaker 100 may be provided with various techniques apparent to those of ordinary skill in the art, so more specific A description will be omitted.

1 to 3 , the hydraulic breaker 100 may include a horizontal displacement detection unit 150 . The horizontal displacement detecting unit 150 may be provided in contact with the outer periphery of the chisel 130 to sense the horizontal displacement of the chisel 130 . For example, the horizontal displacement may be a displacement occurring in the horizontal direction corresponding to the 3 o'clock-9 o'clock direction with respect to the horizontal displacement detecting unit 150 shown in FIG. 1 .

The housing 140 may include a sensing unit accommodating groove 141 and a hole 142 so that the horizontal displacement sensing unit 150 can be coupled thereto. A detailed description of the sensing unit accommodating groove 141 and the hole 142 will be described later.

1 to 3 , the horizontal displacement detection unit 150 may include a rotation member 151 , a support unit 152 , and a detection unit 153 .

1 and 3, the rotating member 151 is directly on the chisel 130 so as to be rotatable with respect to (corresponding to) movement in the vertical direction (based on FIG. 1, 12 o'clock - 6 o'clock) of the chisel 130. It may be provided to be in contact.

The rotating member 151 may be rotated according to the vertical movement of the chisel 130 . In addition, the rotating member 151 may be provided as a ball member or a roller member to enable rotation according to the vertical movement of the chisel 130 . For example, when the rotating member 151 is provided as a ball member, the ball member may be provided as a spherical ball bearing. In addition, when the rotating member 151 is provided as a roller member, the roller member may be provided as a cylindrical roller bearing having a circular cross-sectional area. For example, the rotating member 151 provided as a cylindrical roller bearing may be provided to be rotatable by being provided with a horizontal direction as a rotation axis. However, the rotation member 151 is not limited thereto, and may be applied as a member capable of various rotations, which is apparent to those skilled in the art or to be developed in the future.

In addition, referring to FIG. 3 , the rotating member 151 has a gap (g) between the chisel 130 and the housing 140 in order to prevent the rotating member 151 from being separated between the chisel 130 and the housing 140 . ) may be formed to have a diameter more than twice that of For example, the rotating member 151 is spaced so that when the chisel 130 is biased to one side from its original position due to the inflow of foreign substances, the rotating member 151 does not deviate into the interval g region. It may be desirable to have a diameter of at least twice g). If the chisel 130 is completely biased to be in contact with either inner circumferential surface in the inner space of the housing 140, the opposite side of the chisel 130 is 2 g corresponding to twice the interval g when the chisel 130 is positioned in the normal position. A gap region may be formed. In order to prevent the rotation member 151 from being separated with respect to the area having a gap of 2 g, the rotation member 151 is preferably provided to have a diameter of 2 g or more.

Also, referring to FIGS. 1 to 3 , the support part 152 may include a rotating member accommodating part 152a, an elastic member 152b, and an extension member 152c.

The rotating member accommodating part 152a may be provided to accommodate the rotating member 151 so that the rotating member 151 is rotatably in contact with the chisel 130 . For example, when the rotating member accommodating part 152a rotates according to the vertical movement of the chisel 130, the rotating member accommodating part 152a may occur between the rotating member accommodating part 152a and the rotating member 151. In consideration of friction, it may be provided with a low-friction material so as not to interfere with the rotation of the rotating member 151 . Also, for example, a liquid such as lubricating oil may be applied to the rotating member accommodating portion 152a to overcome frictional resistance (to maintain a rotatable low friction state when friction with the chisel occurs).

Also, referring to FIGS. 2 and 3 , for example, the rotating member accommodating part 152a may be provided in a concave shape corresponding to the shape of the rotating member 151 so that the rotating member 151 is rotatable. Also, for example, when the rotating member accommodating part 152a rotates the rotating member 151 or horizontal displacement of the chisel 130 occurs, the shape of the rotating member accommodating part 152a is deformed by the rotating member 151 It may be provided with a hard material so that it does not occur. Also, for example, in order to prevent the rotating member 151 from being separated from the rotating member receiving portion (152a). The rotating member 151 may be coupled (accommodated) with respect to the rotating member accommodating part 152a in a forced-fitting form, and may be rotatably provided in a state of being accommodated in the rotating member accommodating part 152a in a forced-fitting form.

4 is a conceptual diagram for explaining the state of the horizontal displacement detection unit when a foreign substance is introduced into the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application, and FIG. 5 is a foreign substance inflow determination according to an embodiment of the present application A condition that can be mechanically (physically) measured inside the sensing unit of the outer end of the extension member extending outward from the outer end of the rotating member receiving part of the hydraulic breaker and interlocking in the horizontal movement and displacement side of the rotating member receiving part ( If necessary, it is a view for explaining by way of example, and FIG. 6 is a view for exemplarily explaining the external end of the rotating member accommodating part of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application, extending outward to accommodate the rotating member Additional mechanical connection to the end point exposed to the outside by extending (protruding) more outward than the embodiment of FIG. It is a diagram for explaining another embodiment in which displacement measurement is possible through electrical connection if necessary.

In addition, referring to FIGS. 1 to 4 , the elastic member 152b of the support 152 rotates the chisel 130 even when the chisel 130 is maximally spaced apart from the horizontal displacement sensor 150 in the horizontal direction. The rotating member 151 may be elastically supported by pressing the 130 . For example, the elastic member 152b may support the rotating member 151 not to be spaced apart from the chisel 130 in a state in which the horizontal displacement detecting unit 150 is coupled to the housing 140 .

Referring to FIG. 5A , the elastic member 152b may be provided to be interposed between the rotating member accommodating part 152b and the sensing unit 153 in an elastically compressed state. For example, the elastic member 152b is elastically compressed when the rotating member 151 is in contact with the chisel 130 and the chisel 130 is biased in a direction opposite to the position to which the horizontal displacement detecting unit 150 is coupled. The elastic member 152b interposed in the state may be provided in an elastically compressed state so that the rotating member 151 does not move away from the chisel 130 by elasticity. In addition, the elastic member 152b in the elastically compressed state may be compressible even if the elastic member 152b receives more elastic compression.

For example, when the present hydraulic breaker 100 operates and the chisel 130 strikes an object, fragments (foreign substances) of the object that are crushed by the impact flow into the gap between the chisel 130 and the housing 140 . The chisel 130 may be tilted or moved horizontally to one side due to the inflow of the foreign material 200 . At this time, for example, referring to FIGS. 4 and 5 , the elastic member 152b is a rotating member by narrowing or moving the distance between the chisel 130 and the housing 140 as the chisel 130 is biased to one side. Elasticity may be provided to prevent the 151 from being pushed away or pushed back from the chisel 130 . For example, the foreign material 200 may be fragmented particles of the object, or may be processed chips due to insufficient cleaning.

Also, for example, the elastic member 152b may be a member having an empty space (passage) in the middle, such as a coil (helical) spring member, a tube (cylinder) member made of an elastic material, or the like. Also, for example, the elastic member 152b may greatly alleviate the impact transmitted to the horizontal displacement sensing unit when the chisel 130 hits the target.

The extension member 152c may extend outwardly from the outer end of the rotating member accommodating part 152a to be interlocked with horizontal movement and displacement of the rotating member accommodating part 152a. For example, the extension member 152c may be provided to measure the horizontal displacement of the rotary member 151, and is provided to extend outwardly from the outer end of the rotary member accommodating part 152a to the side of the sensing unit 153. can be

Also, for example, referring to FIGS. 5 and 6 , the extension member 152c may be provided to be positioned in an empty space (passage) of the elastic member 152b.

4 to 6 , the sensing unit 153 may be provided to sense the horizontal displacement amount of the rotating member 151 .

In addition, the sensing unit 153 detects the horizontal displacement amount of the rotary member 151 and the rotary member 151 through the detection of the horizontal displacement amount of the rotary member accommodating portion 152a for accommodating the rotary member 151. The amount of displacement in the horizontal direction of the chisel 130 may be predicted.

2, 5 and 6 , the sensing unit 153 may be coupled to a support 152 . For example, the sensing unit 153 may be provided with a groove corresponding to the shape of the support part 152 on one side (eg, the 3 o'clock direction in FIG. 2 ) so that the support part 152 is coupled.

For example, in (a) of FIG. 5, the chisel 130 is normally positioned (for example, it is measured at any position between the chisel 130 and the housing 140 between the chisel 130 and the housing 140) Centering state that can be seen as measured), FIG. 5 (b) shows that the chisel 130 is moved in parallel toward the horizontal displacement sensing unit 150 to be biased or tilted. As a case, the elastic member 152b may be in a more compressed state than the elastic member 152b shown in FIG. ) can be moved to the outside (9 o'clock side based on FIG. 5) more than the outer end position shown in FIG. That is, the sensing unit 153 may measure (predict) the amount of horizontal movement displacement of the rotating member 151 by measuring the position of the outer end of the extended member 152c moved further outward.

In addition, (c) of FIG. 5 is a case in which the chisel 130 is moved in parallel further (inward) from the horizontal displacement sensing unit 150 to be biased or inclined, and the elastic member 152b is shown in FIG. Although the compression is relieved than that of the elastic member 152b shown in (a), it may be placed in an elastically compressed state that pushes the chisel 130 while still having an elastic restoring force, and thus the outer end of the extension member 152c (end point) may be moved more inward (3 o'clock side based on FIG. 5) than the position of the outer end shown in FIG. 5(a) . That is, the sensing unit 1530 may measure (predict) the amount of horizontal movement displacement of the rotating member 151 by measuring the position of the outer end of the extended member 152c moved further inward.

On the other hand, FIG. 6 is similar to FIG. 5 , but exemplarily shows a case in which the outer end point of the extension member 152c is protruded outwardly so as to be exposed to the outside, and thus the outer end is exposed to the outside. In this case, it may be possible to measure displacement from the outside through mechanical (physical) connection and electrical connection to the exposed outer end. For example, the horizontal movement displacement of the outer end of the extension member 152c may be measured through electrical connection using a flexible line that is relatively free from the impact at the time of hitting. However, the mechanical (physical) measurement method or the electrical measurement method for the outer end of the extension member 152c is not limited thereto, and various measurements having durability against impact at the time of hitting or transmission of shock at the time of hitting are more mild. A method or a connection method may be applied. Referring to FIG. 6, for example, a pressure sensor is disposed with respect to the outer end exposed to the outside, the pressure of the outer end exposed to the outside is measured to press the pressure sensor, and the horizontal level of the chisel 130 is used using the pressure. A calculation in the form of estimating the directional movement displacement may be performed. More specifically, as shown in FIG. 6(c), as the outer end of the extension member 152c protrudes relatively less, the pressure applied by the outer end to the pressure sensor is relatively small, and accordingly, the chisel 130 in FIG. 6 In contrast to the state of (a), it can be determined that the horizontal movement is more biased in the 3 o'clock direction based on FIG. 6 . In addition, it can be estimated that the foreign material 200 has flowed into the space between the chisel 130 in the 9 o'clock direction in consideration of whether such a biased state is maintained for a predetermined time or more.

Due to the horizontal movement displacement measurement of the detection unit 153, the detection unit 153 causes the foreign material 200 to flow between the chisel 130 and the housing 140, and when the chisel 130 is biased to one side, The rotating member accommodating part 152a is moved by the horizontal displacement change amount of the chisel 130 to detect the horizontal movement of the rotating member accommodating part 152a and the displacement amount of the extended member 152c interlocked in the displacement side.

Also, referring to FIGS. 3 and 4 , the sensing unit 153 may be provided to be coupled to the housing 140 . 3 and 4 , the sensing unit 153 and the sensing unit accommodating groove 141 of the housing 140 may be provided to be screw-coupled to each other.

The sensing unit accommodating groove 141 and the sensing unit 153 may be formed with female threads on the inner periphery of the sensing unit accommodating groove 141 to be screw-coupled to each other. In addition, a male thread may be formed around the corresponding sensing unit 153 . For example, the sensing unit 153 may be detachably attached to the sensing unit accommodating groove 141 by this screw coupling, and it is connected (coupled, mounted) in a screwed form to be coupled more stably compared to a non-threaded coupling. can

In addition, for example, the hydraulic breaker 100 includes a cover member 154 to prevent the horizontal displacement detection unit 150 from falling off (departing) due to vibration generated during operation of the hydraulic breaker 100. may include For example, the cover member 154 may be a cover cap, and is not limited thereto, and may be a cover member known to those skilled in the art or a cover member to be developed in the future, so a more detailed description will be omitted. do.

In addition, the sensing unit accommodating groove 141 may be formed in the outer wall (circumferential wall) of the housing 140 in the inner and outer directions (refer to FIG. 3 , at the 9 o'clock side).

Also, the hole 142 of the housing 140 may be formed inside the outer wall (circumferential wall) of the housing 140 in the inner and outer directions (refer to FIG. 3 , the 3 o'clock side). Also, the hole 142 may be formed to communicate with the sensing unit accommodating groove 141 . In addition, for example, the hole 142 may be positioned at the center of the sensing unit receiving groove 141 , and the rotating member 151 and the supporting part 152 may be formed to pass therethrough. For example, the hole 142 may be formed to correspond to the position of the support part 152 of the horizontal displacement sensor 150 .

In addition, referring to FIGS. 2 and 3 , the support part 152 of the horizontal displacement detection unit 150 rotates in conjunction with the detection unit 153 when the detection unit 153 is rotated by screwing with the detection unit accommodating groove 141 . It may be provided so as to have a degree of freedom in a rotation-unconstrained state. For example, when the user couples the horizontal displacement detection unit 150 to the housing 140 , the detection unit 153 is rotated as the detection unit 153 is screwed to the detection unit accommodating groove 141 . The support 152 coupled to the sensing unit 153 may be provided to rotate without rotating together with the sensing unit 153 . That is, the support 152 may be provided in a structure in which a degree of freedom is provided so as not to interlock with the rotation of the sensing unit 153 .

In addition, referring to FIGS. 2 and 3 , when the horizontal displacement detecting unit 150 is coupled to the housing 140 , the rotating member 151 contacts the chisel 130 , and the elastic member 152b is elastically compressed. It may be interposedly coupled to the state.

The hydraulic breaker 100 may include a control unit that receives a displacement signal from the horizontal displacement detection unit 150 . For example, the control unit may be disposed on the excavator. Illustratively, the control unit is provided in the excavator, and may be electrically connected to the present hydraulic breaker 100 by electric wires installed along the arm portion to which the present hydraulic breaker 100 is mounted (coupled), etc.

The controller may determine whether a foreign material is introduced between the chisel 130 and the housing 140 based on the displacement signal received from the horizontal displacement sensor 150 . That is, for example, when the amount of change in the horizontal displacement of the chisel 130 occurs, the horizontal displacement detecting unit 150 detects a change in the scalar value of the displacement of the rotating member accommodating part 152a, and the chisel 130 and the housing ( 140), it can be determined that a foreign substance has been introduced between the For example, referring to FIGS. 4 to 6 , when the hydraulic breaker 100 operates and the chisel 130 strikes the object, the fragments (foreign substances) of the object that are crushed by the impact are separated from the chisel 130 and It may be introduced into the gap between the housing 140 , and the chisel 130 may be biased to one side due to the inflow of this foreign material. At this time, for example, referring to FIG. 4 , the elastic member 152b moves with the rotating member 151 in contact with the chisel 130 as the chisel 130 is tilted to one side, and the extension member ( 152c) can also be moved forward or backward from the sensing unit 153 (eg, forward when moving in the 3 o'clock direction in FIG. 5, and backward when moving in the 9 o'clock direction) from the sensing unit 153. The displacement amount of the extension member 152c is sensed through the movement of the extension member 152c, and the controller may determine that a foreign material has been introduced between the chisel 130 and the housing 140 according to a change in the scalar value of the displacement amount.

For example, the controller may measure and determine a change value based on information obtained from the horizontal displacement sensor 150 in a state in which the foreign material 200 is not introduced (normal state).

7 is a conceptual diagram (plan view) for explaining a horizontal displacement detection unit and an impact detection sensor coupled with respect to the first horizontal axis and the second horizontal axis of the hydraulic breaker capable of determining the inflow of foreign substances according to an embodiment of the present application.

Referring to FIG. 7A , the horizontal displacement detecting unit 150 may be coupled to the housing 140 in one direction of the first horizontal axis and one direction of the second horizontal axis, which is a direction orthogonal to the first horizontal axis. For example, the first horizontal axis may be a radial direction from the center (center) of the chisel 130 in a horizontal direction, and a horizontal direction corresponding to the inner and outer directions. For example, referring to FIG. 7A , the first horizontal axis may be an axis corresponding to the 3 o'clock-9 o'clock direction. Also, for example, the second horizontal axis may be a horizontal direction corresponding to a direction orthogonal to the first horizontal axis. For example, referring to FIG. 7A , the second horizontal axis may be an axis corresponding to the 12 o'clock-6 o'clock direction.

For example, the present hydraulic breaker 100, when the horizontal displacement of the chisel 130 with respect to the first horizontal axis occurs, the chisel 130 through the horizontal displacement sensing unit 150 coupled to one direction of the first horizontal axis. , and when the horizontal displacement of the chisel 130 occurs with respect to the second horizontal axis, the horizontal displacement of the chisel 130 is detected through the horizontal displacement detecting unit 150 coupled to one direction of the second horizontal axis. can do. In addition, as another example, the hydraulic breaker 100 is a horizontal displacement detection unit 150 coupled to one direction of the first horizontal axis when the horizontal displacement of the chisel 130 occurs between the first horizontal axis and the second horizontal axis. and the horizontal displacement detecting unit 150 coupled to one direction of the second horizontal axis may be linked to detect the horizontal displacement of the chisel 130 .

Meanwhile, referring to FIG. 1 , the hydraulic breaker 100 may include an impact sensor 160 .

Referring to FIG. 7B , the impact sensor 160 may be provided in the housing 140 in both directions of the first horizontal axis and the second horizontal axis. For example, referring to FIG. 7B , the impact sensor 160 may be provided with respect to two axes covering the horizontal direction of the housing 140 . Accordingly, two impact sensors 160 may be provided to correspond to each of the two axes. Alternatively, as another example, the impact sensor 16 is provided corresponding to each of the positive and negative directions of the first axis among the two axes, and is provided corresponding to each of the positive and negative directions of the second axis A total of four may be provided in the form.

The impact sensor 160 may detect an amount of impact generated between the chisel 130 and the housing 140 when a foreign substance is introduced into the gap between the chisel 130 and the housing 140 . For example, when there is no foreign material in the gap between the chisel 130 and the housing 140, the amount of impact detected by the impact sensor 16 disposed in correspondence to the first axis is a1, and disposed in correspondence to the second axis If the amount of impact detected by the shock detection sensor 16 is a2, when a foreign substance is introduced into the gap, an impact amount different from the a1 and a2 values (for example, a larger impact amount or a smaller impact amount compared to the original impact amount) is can be detected. Based on the change in the sensed amount of impact, the controller may determine that a foreign material has been introduced into the gap between the chisel 130 and the housing 140 .

The controller may receive the amount of impact from the plurality of impact sensors 160 , and determine that the foreign material 200 is introduced between the chisel 130 and the housing 140 in consideration of the change in the scalar value of the amount of impact. At least one of the plurality of impact detection sensors 160 is operated in a state in which foreign substances 200 are not introduced into the hydraulic breaker 100 viewed between the chisel 130 and the housing 140 at their respective installed positions. When it is sensed that an impact amount different from the impact amount has occurred, the controller may determine the inflow of foreign substances based on the changed impact amount detection.

That is, the control unit measures the change value based on the amount of impact obtained from the shock detection sensor 160 during operation of the hydraulic breaker 100 in a normal state in which the foreign material 200 is not introduced to determine whether the foreign material is introduced or not. Characteristics (size, type, hardness, strength, etc.) of foreign substances can be determined.

In addition, the present hydraulic breaker 100 may include a sound sensor. When the foreign material 200 is introduced into the gap between the chisel 130 and the housing 140, the sound sensor may detect a sound generated by friction between the foreign material 200 and the chisel 130 or the housing 140. have. For example, the sound sensor includes a foreign material 200 and a chisel 130 or a foreign material 200 and a housing 140, except for a loud sound such as an impact sound and a crushing sound generated when the hydraulic breaker 100 is operated. ) may be provided to detect the sound of a friction sound generated between the

Also, the controller may determine whether the foreign material 200 is introduced into the space between the chisel 130 and the housing 140 based on the sound sensed by the sound sensor. For example, when the detected sound includes a sound waveform (eg, a sound waveform having a specific frequency band and a specific amplitude) corresponding to a fricative sound caused by the introduction of a foreign substance, the controller may determine that the foreign substance is introduced. As another example, the control unit uses the sensed sound as an input value for the neural network based on a neural network built by learning through a learning set (training set) obtained through an experiment in advance in relation to a fricative sound generated when a foreign substance is introduced. And it is possible to perform sound-based determination of whether foreign substances are introduced by using an AI algorithm that uses the input of foreign substances, the type (characteristic) of the introduced foreign substances, etc. as output values to the neural network.

Since information on sound can be acquired (detected) even at a location spaced apart from a point where the sound is generated, such a sound sensor may be spaced apart from the chisel 130 . For example, the sound sensor may be disposed in an excavator in which the present hydraulic breaker 100 is installed (mounted). In addition, as another example, the sound sensor may be disposed on the housing 140 of the present hydraulic breaker 100 (refer to FIG. 1, 12 o'clock direction). However, the present invention is not limited thereto, and the sound sensor may be arranged in various ways in consideration of the position to the extent that it is not damaged by the impact generated during the operation of the hydraulic breaker 100 .

In addition, the controller may receive detected information measured from at least one of the horizontal displacement sensor 150 , the impact sensor 160 , and the sound sensor. For example, detection information measured by at least one of the horizontal displacement detection unit 150, the impact detection sensor 160, and the sound detection sensor (eg, one of horizontal displacement detection information, impact amount detection information, and sound detection information) above) may be transmitted to the control unit by wire or wirelessly, and the control unit may determine whether or not a foreign material has been introduced, a characteristic (type) of the introduced foreign material, etc. based on the received sensing information.

For example, the controller may receive horizontal displacement information sensed through the horizontal displacement sensor 150 , impact amount information sensed through the impact sensor 160 , and sound waveform information sensed through the sound sensor 160 .

In addition, the control unit may perform a determination regarding the inflow of foreign substances using a previously learned and built neural network model (eg, a neural network model corresponding to deep learning). For example, the neural network model uses a learning set in which at least one of the horizontal displacement information, the impact amount information, and the sound waveform information is an input value and a judgment item related to the inflow of foreign substances is an output value, such as an indoor test, an outdoor test, a field test, etc. After securing in advance through , it can be built in advance using the learning set. The control unit inputs one or more of the actually measured horizontal displacement information, impulse amount information, and sound waveform information to the instrument axis neural network using the previously built neural network model, and input the foreign matter inflow related determination result information output from the instrument axis neural network. Based on the inclusion of foreign substances, a determination may be made.

In addition, as another example, the control unit uses a trend line, a lookup table, an equation, etc. constructed using the detection information received from one or more of the horizontal displacement detection unit 150 , the impact detection sensor 160 , and the sound detection sensor to use foreign substances Judgments can be made regarding inflows.

In addition, the control unit is based on the determination result related to the inflow of foreign substances or based on the detection information received from one or more of the horizontal displacement detection unit 150, the shock detection sensor 160, and the sound detection sensor, the operation stop signal, washing A signal or replacement signal may be generated, and the generated signal may be provided to a user in various ways.

For example, as an example of the various methods, the control unit displays an operation stop signal, a washing signal or a replacement signal on an equipment monitor (eg, a display unit) or transmits the operator's terminal (eg, a mobile phone), etc., You can enable the user to take action based on these signals. Also, as another example, the control unit may transmit an operation stop signal, a washing signal, or a replacement signal to the user through a visual indicator such as an LED display that can be confirmed from the driver's seat of the equipment to which the hydraulic breaker is connected.

In addition, the control unit uses the detection information received from at least one of the horizontal displacement detection unit 150, the shock detection sensor 160, and the sound detection sensor as an input value, and a normal operation signal and an abnormal operation signal (eg, an operation stop signal) , washing signal, and replacement signal) as an output value, it is possible to perform an operation related to signal generation using a neural network model that has been previously learned and built.

The control unit performs overall control so that each of the components can perform their functions normally. Such a control unit may be implemented in the form of hardware or software, or may be implemented in a combined form of hardware and software. The control unit may be implemented in the form of a computing device (arithmetic unit) such as a microprocessor, but is not limited thereto, and may be implemented in various forms apparent to those skilled in the art.

The above description of the present application is for illustration, and those of ordinary skill in the art to which the present application pertains will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present application.

100: hydraulic breaker capable of determining the inflow of foreign substances
110: cylinder
120: piston
130: chisel
140: housing
141: sensing unit receiving groove
142: Hall
150: horizontal displacement detection unit
151: rotating member
152: support
152a: rotating member receiving portion
152b: elastic member
152c: extension member
153: detection unit
154: cover member
160: shock detection sensor
200: foreign matter

Claims (5)

As a hydraulic breaker capable of judging the inflow of foreign substances,
a cylinder provided with a hydraulic circuit;
a piston which reciprocates up and down in the cylinder by the hydraulic pressure provided by the hydraulic circuit;
a chisel located under the piston and provided to hit an object by a vertical reciprocating motion of the piston;
a housing having an outer wall surrounding the outer periphery of the cylinder and the piston to accommodate the cylinder and the piston in an inner space formed so as to perform vertical reciprocating motion of the piston and striking of the chisel;
a horizontal displacement detection unit provided in contact with an outer periphery of the chisel to sense the horizontal displacement of the chisel;
a control unit receiving a displacement signal from the horizontal displacement detecting unit; and
When a foreign material is introduced into the gap between the chisel and the housing, a sound sensor for detecting a sound generated by friction between the foreign material and the chisel or the housing,
The horizontal displacement detection unit,
a rotating member provided to be in direct contact with the chisel so as to be rotatable with respect to the vertical movement of the chisel;
A rotating member accommodating part provided to accommodate the rotating member so that the rotating member is rotatably in contact with the chisel, even when the chisel is maximally spaced apart from the horizontal displacement sensing unit in the horizontal direction, the rotating member holds the chisel a support part including an elastic member elastically supporting the rotating member to pressurize and an extension member extending outwardly from the outer end of the rotating member accommodating part to be interlocked with horizontal movement and displacement of the rotating member accommodating part;
and a sensing unit provided to detect an amount of displacement in the horizontal direction of the rotating member,
The elastic member is provided to be interposed in an elastically compressed state between the rotating member receiving portion and the sensing unit,
The sensing unit predicts the horizontal displacement amount of the rotary member and the horizontal displacement amount of the chisel with which the rotary member is in direct contact through detection of the horizontal displacement amount of the rotary member accommodating part for accommodating the rotary member,
The horizontal displacement sensing unit is coupled to the housing with respect to one direction of the first horizontal axis and one direction of the second horizontal axis, which is a direction orthogonal to the first horizontal axis,
The housing includes a sensing unit accommodating groove and hole so that the horizontal displacement sensing unit can be coupled,
The sensing unit accommodating groove is formed on the outside inside the housing outer wall, and the hole is formed on the inside inside the housing outer wall,
The hole is connected in communication with the sensing unit receiving groove,
A female thread is formed on an inner periphery of the sensing unit accommodating groove so that the sensing unit accommodating groove and the sensing unit can be screwed to each other, and a male thread is formed on a periphery of the sensing unit corresponding thereto,
The support portion is provided to have a degree of freedom in a non-rotationally constrained state so that the sensing unit is not rotated by interlocking with it when it is rotated by screwing with the sensing unit accommodating groove,
The horizontal displacement sensing unit, when coupled to the housing, the rotating member is in contact with the chisel, the elastic member is coupled to be interposed in an elastically compressed state,
The control unit, based on the displacement signal received from the horizontal displacement detection unit, performs a determination regarding the introduction of foreign substances between the chisel and the housing,
The rotating member is
It is provided with a ball member or a roller member to enable rotation according to the vertical reciprocating motion of the chisel,
In order to prevent separation of the rotating member between the chisel and the housing, it is formed to have a diameter of at least twice the distance between the chisel and the housing,
The control unit is
Based on the sound sensed by the sound sensor, a determination is made regarding the introduction of foreign substances between the chisel and the housing,
The sound sensor is a hydraulic breaker capable of determining the inflow of foreign substances, which is arranged to be spaced apart from the chisel. delete delete According to claim 1,
The hydraulic breaker includes an impact sensor that detects an amount of impact generated between the chisel and the housing when a foreign material is introduced into the gap between the chisel and the housing,
The control unit receives an amount of impact from the plurality of impact sensors, and determines that a foreign material has flowed between the chisel and the housing in consideration of a change in a scalar value of the impact amount, a hydraulic breaker capable of determining foreign material inflow. 5. The method of claim 4,
The control unit performs a determination related to the inflow of foreign substances using a neural network model that has been previously learned and built,
The neural network model uses one or more of the horizontal displacement information obtained from the horizontal displacement sensor, the impact amount information obtained from the impact detection sensor, and the sound waveform information obtained from the sound detection sensor as input values, and determines related to the inflow of foreign substances A hydraulic breaker capable of judging the inflow of foreign substances, which is a neural network model built in advance using a learning set with items as output values.

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