KR102219023B1 - Fixing structure for sensor of hydraulic breaker - Google Patents

Abstract

The present invention relates to a fixing structure for a sensor of a hydraulic breaker which is able to fix the sensor firmly on an outer side of a cylinder of the hydraulic breaker by using a vibration-proof structure, to prevent the sensor from being displaced following an external impact or vibration generated when the hydraulic breaker operates, to prevent the sensor from being damaged due to the impact, and to have an improved structure. According to the present invention, the fixing structure for the sensor of the hydraulic breaker comprises: a communication hole formed to allow an outer side and an inner side of the cylinder of the hydraulic breaker to communicate with each other, and to have a screw engagement unit with a female screw thread formed on the inner circumferential surface; the sensor which has a screw unit formed on the outer circumferential surface and a cable connected by a connector unit on the other end unit to be fastened with the screw engagement unit of the communication hole by a screw; a cap unit which has an accommodation unit covering the connector unit of the sensor, and a penetrating hole formed in the center to allow the cable to pass through; a vibration-proof member made of soft materials, which includes a flange unit formed to be extended to both sides of the cap unit and to have an engagement hole formed to be engaged with an outer wall of the cylinder with the communication hole by an engagement means; and an airtight means which keeps the airtightness of a gap between the sensor and the cap unit. The engagement means includes: a vibration-proof adapter which is fixed on the inner circumferential surface of the engagement hole and which has a fastening hole formed in the center to have a fixing bolt fastened by a screw; and the fixing bolt whose one end unit is fastened with fastening hole and the cylinder.

Description

Fixing structure for sensor of hydraulic breaker

The present invention relates to a sensor fixing structure for a hydraulic breaker, and in particular, by using a vibration-proof structure to securely fix the sensor to the outside of the cylinder of the hydraulic breaker, it prevents the sensor from being detached due to external shock or vibration generated when the hydraulic breaker is operated. It can be, and the structure is improved to prevent damage to the sensor due to impact to a sensor fixing structure for a hydraulic breaker.

In general, a hydraulic breaker is widely used for crushing concrete or rock by attaching it to construction equipment such as an excavator and a loader. It crushes concrete and rock mass by the impact force hitting the piston while moving it up and down.

This hydraulic breaker consists of a cylinder and a piston operated by hydraulic pressure, and a chisel used to crush an object is attached to the front of the cylinder.

When the piston moves reciprocally by the operation of the cylinder, the chisel is hit and a strong impact is applied to the object, causing the object to be split or broken.

A gas chamber is provided at the rear end of the hydraulic cylinder, and a valve device that controls the supply of fluid required for the operation of the piston is provided on one side of the surface of the hydraulic cylinder, and hydraulic oil is temporarily stored on the surface of the hydraulic cylinder adjacent to the fluid control unit for movement. An accumulator for use as an energy source is formed.

Existing hydraulic breakers have a constant stroke distance of the piston when moving the piston up and down regardless of the type and strength of the rock mass to be crushed, so the working speed cannot be changed according to the strength of the rock mass. There is a problem of deterioration.

As a prior art for improving this, as disclosed in Korean Patent Laid-Open Publication No. 10-2015-0034071 "Stroke Valve for Hydraulic Breaker Control" (published date: 2015.04.02), the piston is formed to be capable of reciprocating motion, A stroke valve for controlling a hydraulic breaker having a cylinder body in which a plurality of pressure holes for increasing or decreasing the pressure are formed, connected to the pressure holes of the hydraulic breaker, and the stroke of the piston by selectively increasing or decreasing the pressure of each of the pressure holes. It is to set the distance.

Conventional breakers have a long stroke mode that lengthens the stroke distance of the piston so that the impact force is reinforced for hard rock crushing according to the operator's operation, and a short stroke mode that improves the hitting speed even at the expense of some hitting force for soft rock crushing. It is configured to change (short stroke).

However, such a conventional breaker is not only difficult to use in the case of an unskilled person because the mode selection depends entirely on the operator's discretionary judgment, and there is a problem in that it is cumbersome to operate when frequent mode change is required when hitting.

As a prior art related to a sensor applied to an existing hydraulic breaker, as disclosed in Korean Patent Publication No. 10-1799576, "Intelligent hydraulic breaker using proximity sensor and construction equipment including the same" (registration date: 2017.11.14), A cylinder to which hydraulic pressure is supplied; A piston accommodated in the cylinder and moving forward or backward by hydraulic pressure; A chisel positioned in front of the piston so as to be hit by the piston, one end positioned inside the cylinder and the other end exposed from the front end of the cylinder; A main valve configured to control a forward or backward movement of the piston by controlling hydraulic pressure connected to the long stroke port and the short stroke port formed in the cylinder; A sensor formed in the cylinder to detect the position of the piston in the cylinder; A solenoid valve connected to the main valve and hydraulic pressure, and controlling hydraulic pressure connected to the short stroke port; And a controller that transmits 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 so that the chisel is positioned within a stroke distance of the movement when the chisel passes through the hitting object.

However, although a proximity sensor is adopted as a sensor that detects the position of the existing piston, the above-described proximity sensor is arranged to be fixed outside the cylinder of the hydraulic breaker, but the fixed structure is damaged by external shock and vibration transmitted when the breaker is hit. In addition, there is a fear that the sensor may be separated from the hydraulic breaker by being released or released, and there is a fear that accurate sensing and measurement may not be made.

Korean Patent Application Publication No. 10-2015-0034071 "Stroke valve for hydraulic breaker control" (Publication date: 2015.04.02) Korean Patent Publication No. 10-1799576 "Intelligent hydraulic breaker using proximity sensor and construction equipment including the same" (Registration date: 2017.11.14)

The present invention was created to solve the above problems in consideration of the above problems, and its object is to securely fix the sensor to the outside of the cylinder of the hydraulic breaker using a vibration-proof structure, thereby preventing external shock or vibration generated during operation of the hydraulic breaker. It is to provide a sensor fixing structure for a hydraulic breaker with an improved structure so as to prevent separation of the sensor and prevent damage to the sensor due to impact.

The present invention for achieving the above object is a communication hole formed to communicate with the outside and inside the cylinder of the hydraulic breaker and provided with a fastening portion having a female thread formed on the inner peripheral surface; A sensor having a threaded portion formed on the outer circumferential surface so as to be screwed into the fastening portion of the communication hole and a cable connected to the other end thereof by a connector portion; A receiving portion in the form of enclosing the connector portion of the sensor is formed and a cap portion having a through hole formed in the center so that the cable passes through, and the cap portion formed to extend to both left and right sides of the cap portion and formed to extend to both the left and right sides of the cap portion by a coupling means on the outer wall of the cylinder where the communication hole is formed. A vibration-proof member made of a soft material composed of a flange portion having a coupling hole formed to be coupled; And an airtight means for maintaining the airtightness of the gap between the sensor and the cap part; wherein the coupling means is fixed to the inner circumferential surface of the coupling hole, and a vibration-proof adapter having a fastening hole formed so that a fixing bolt is screwed in the center, and one end of the fastening It characterized in that it consists of a ball and a fixing bolt fastened to the cylinder.

The vibration isolating member is made of a urethane material, and the vibration isolating adapter is made of a monomer caster nylon material.

The anti-vibration adapter includes a fastening portion having a male thread formed on an outer circumferential surface to be screwed with the coupling hole, and a head portion having a diameter larger than that of the fastening portion outwardly spaced apart from the fastening portion, and the head portion being accommodated outside the coupling hole. The receiving groove is formed, and the receiving groove and the head are bonded to each other by a bonding liquid.

One end of the sensor is disposed to be spaced apart from the inner wall of the cylinder toward the outside with a predetermined gap.

The vibration-proof adapter has a width shorter than the thickness of the flange portion so as to have a clearance gap corresponding to the contraction width of the vibration-proof member.

Another characteristic element of the present invention includes a communication hole formed to communicate the outside and the inside of the cylinder of the hydraulic breaker; The first and second fitting portions stepped on the outer circumferential surface and a coupling flange having a diameter larger than that of the second fitting portion are formed, and the first and second fitting portions are fitted into the communication hole, and the threaded portion of the sensor is screwed into the center. A vibration isolator made of a material softer than the material of the cylinder, and the fastening hole is formed; A sensor having a threaded portion formed on the outer circumferential surface so as to be screwed into the fastening hole and a cable connected to the other end thereof by a connector portion; Airtight means for maintaining airtightness between the sensor and the receiving portion of the vibration isolator; A vibration-proof adapter that is fitted to an inner circumferential edge of the connection hole formed on the coupling flange and has a fastening hole formed at a center to which a fixing bolt is fastened, and is made of a material harder than the vibration-proof hole; And a fixing bolt fastened to the fastening hole and screwed to the cylinder to fix the vibration isolator to the cylinder.

The anti-vibration adapter is bonded to the inner circumferential surface of the connection hole of the coupling flange with a bonding solution.

The present invention securely couples the screw part of the sensor to the communication hole by screwing and bonding, and prevents the separation of the vibration-proof member by using a vibration-proof adapter and a fixing bolt, and is transmitted to the sensor side when the hydraulic breaker is operated. By minimizing shock or vibration, even if the connection between the sensor and the communication hole is released, it is possible to accurately sense the stroke position of the piston by preventing separation of the sensor, and has a useful advantage of improving the durability of the sensor product.

In addition, since the communication hole of the present invention is composed of stepped first and second communication holes, one end of the sensor has the advantage of being able to easily limit the movement distance of the sensor so that it is spaced apart from the piston accommodated in the cylinder at an appropriate sensing interval.

And, in the vibration-proof adapter of the present invention, the width of the vibration-proof adapter is formed to be shorter than the thickness of the flange portion so as to have a clearance gap corresponding to the contraction width of the flange portion. Due to the gap, the dust-proof adapter is in surface contact with the outer wall of the cylinder, so that the dust-proof adapter can be firmly fixed.

1 is an exploded view showing the configuration of an embodiment of a sensor fixing structure for a hydraulic breaker according to the present invention.
Figure 2 is an exploded perspective view of the present invention dustproof member and dustproof adapter.
Figure 3 is a front view showing the coupling state of the present invention the vibration-proof member and the dust-proof adapter.
Figure 4 is an enlarged cross-sectional view showing the coupling structure of the vibration-proof member and the dust-proof adapter of the present invention.
5 is a combined state diagram of an embodiment of the present invention.
6 is a cross-sectional view showing another embodiment of a sensor fixing structure for a hydraulic breaker according to the present invention.
Figure 7 is an exploded perspective view of the present invention dust-proof and dust-proof adapter.
Figure 8 is an exploded view of Figure 6;

The present invention improves a structure in which a sensor is coupled to a communication hole drilled through the inside and outside of a cylinder, thereby improving vibration isolation performance to minimize shock or vibration transmitted to the sensor side.

Hereinafter, a sensor fixing structure for a hydraulic breaker according to the present invention will be described in more detail through detailed description of embodiments with reference to the drawings.

In describing the present invention, if it is determined that a detailed description of a related known technology or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to user intentions or customs. Therefore, the definition should be made based on the contents throughout this specification. In addition, "including" a certain component means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

An embodiment of the sensor fixing structure for a hydraulic breaker according to the present invention will be described with reference to FIGS. 1 to 5, a screw coupling part formed to communicate the outside and the inside of the cylinder 100 of the hydraulic breaker and having a female thread on the inner circumferential surface ( 115) a communication hole 110 provided; A sensor 300 having a threaded portion 310 formed on the outer circumferential surface so as to be screwed into the screwing portion 115 of the communication hole 110 and connected to the other end portion by a connector portion 320; A cap part 210 in which a receiving part 212 in a form surrounding the connector part 320 of the sensor 300 is formed and a through hole 215 is formed in the center so that the cable 330 passes, and the cap part 210 A vibration-proof member made of a soft material consisting of a flange portion 220 formed with a coupling hole 230 so as to be coupled to the outer wall of the cylinder 100 in which the communication hole 110 is formed and to be coupled to the outer wall of the cylinder 100 in which the communication hole 110 is formed (200); And an airtight means 600 for maintaining the airtightness of the gap between the sensor 300 and the cap 210, wherein the coupling means is fixed to the inner circumferential surface of the coupling hole 230 and a fixing bolt 500 at the center A vibration-proof adapter 400 having a fastening hole 430 formed therein so as to be screwed, and a fixing bolt 500 having one end fastened to the fastening hole 430 and the cylinder 100.

1 and 2, the communication hole 110 is a first communication hole 112 formed so that the outer wall and the interior of the cylinder 100 of the hydraulic breaker communicate, and the outer side of the first communication hole 112 The second communication hole 114 is formed to communicate with each other and has an inner diameter larger than the inner diameter of the first communication hole 112.

The first communication hole 112 is inserted so that one end of the sensor 300 is accommodated, and the threaded portion 310 of the sensor 300 is coupled to the inner circumferential surface of the second communication hole 114 by a screw fastening method. The screw coupling portion 115 is formed, and has a structure in which the screw coupling portion 115 and the screw coupling portion of the screw portion 310 are bonded by a bonding liquid.

To this end, the second communication hole 114 has a structure in which a female thread is formed on an inner circumferential surface.

The sensor 300 will be described as an example of a proximity sensor for detecting a long stroke or a short stroke position of the piston 150 provided in the cylinder 100.

The anti-vibration member 200 is provided with a cap portion 210 having a receiving portion 212 in which the connector portion 320 of the sensor 300 is accommodated in the center, and a flange portion outside one end of the cap portion 210 ( 220) has a structure that extends.

The cap part 210 is formed in a cylindrical structure protruding outward from the center of the flange part 220, and has a structure in which a through hole 215 is formed so that the cable 330 passes through the center.

The flange part 220 is fixed to the cylinder 100 of the hydraulic breaker by using a fixing bolt 500, and a coupling hole 230 formed in the flange part 220 to prevent separation of the fixing bolt 500 The vibration-proof adapter 400 is coupled to the vibration-proof adapter 400, and the fixing bolt 500 is screwed into the fastening hole 430 of the vibration-proof adapter 400.

The fixing bolt 500 is screwed into the fastening hole 430 and the end thereof is screwed into the fixing hole formed in the cylinder 100.

The vibration isolating member 200 is made of a soft material capable of minimizing the transmission of vibration or shock generated when the hydraulic breaker is operated to the sensor 300 side, and the vibration isolating adapter 400 is the fixing bolt 500 ) Is made of a harder material than the vibration isolating member 200 to prevent separation.

For example, the anti-vibration member 200 may employ a urethane material, and the anti-vibration adapter 400 may be formed of a monomer caster nylon material.

The monomer caster nylon material has better vibration-proofing performance than metal materials, and has superior durability properties than soft materials such as urethane.

In addition, the anti-vibration adapter 400 may employ a light metal such as brass, not a monomer caster nylon material.

2 and 3, a receiving groove part 235 in which the head part 420 of the vibration-proof adapter 400 is accommodated is formed outside the coupling hole 230, and the receiving groove part 235 The inner diameter is formed to have a larger diameter than the inner diameter of the coupling hole 230.

The anti-vibration adapter 400 has a male thread formed on one outer circumferential surface to form a fastening part 410 which is screwed with the inner circumferential surface of the coupling hole 230, and a head 420 accommodated in the receiving groove 235 on the other side. ) Has a formed structure.

The head portion 420 is accommodated in the receiving groove portion 235 and has an outer peripheral surface circumferentially bonded to the inner peripheral surface of the receiving groove portion 235 to prevent separation.

In addition, as shown in FIG. 4, the vibration-proof adapter 400 has a width of the vibration-proof adapter 400 to have a clearance gap corresponding to the contraction width of the flange portion 220 of the vibration-proof member 200. It is formed shorter than the thickness width of the branch part 220 (W1<W2).

Therefore, even if the flange portion 220 of the vibration isolating member 200 is contracted by the tightening force of the fixing bolt 500, the vibration isolating adapter 400 is in surface contact with the outer wall of the cylinder 100 by the clearance gap. The anti-vibration adapter 400 may be firmly fixed.

The sensor 300 is at a position spaced outward from the inner wall 105 of the cylinder 100 in a state where one end is inserted into the first hollow hole and enters the inside of the first communication hole 112 It is arranged to be located.

Accordingly, the present invention provides a gap for processing a groove formed in the inner wall 105 of the cylinder 100 by disposing one end of the sensor 300 to be spaced apart from the inner wall 105 of the cylinder 100. By providing a groove in the inner wall 105 of the cylinder 100 can be prevented from interfering with one end of the sensor 300 during processing.

The sensor 300 has a threaded portion 310 having a male thread formed at an outer periphery spaced apart from one end for screwing with the screwing portion 115.

The screw portion 310 may be screwed to the screw coupling portion 115 and bonded to the inner circumferential surface of the screw coupling portion 115 for fixing.

The first sealing material 610 of the airtight means 600 performs a function of sealing the gap between the sensor 300 and the second communication hole 114 to prevent the oil in the cylinder 100 from leaking to the outside. And, it may be composed of one or a plurality of spaced apart from each other.

The second sealing material 620 of the airtight means 600 seals the space between the connector part 320 and the receiving part 212 of the sensor 300, and through the receiving part 212, the inside of the cylinder 100 In addition to preventing oil from leaking to the outside through the through hole 215 of the cap part 210, foreign substances such as external dust may be prevented from flowing into the cap part 210.

In an embodiment of the present invention having such a configuration, referring to FIG. 5, by rotating while entering one end of the sensor 300 into the interior of the communication hole 110, the threaded portion 310 of the sensor 300 is connected to the second communication. After screwing into the screwing part 115 formed on the inner circumferential surface of the hole 114, the connector part 320 of the sensor 300 is accommodated in the receiving part 212 of the cap part 210, and then a fixing bolt Using 500, the vibration isolating member 200 is fixed to the outer wall of the cylinder 100.

At this time, before the fixing bolt 500 is fastened, the fastening part 410 of the vibration-proof adapter 400 is screwed into the coupling hole 230 of the flange part 220, and the vibration-proof adapter 400 is The head portion 420 is bonded to the inner circumferential surface of the receiving groove portion 235 with a bonding solution to securely fix it, and oil in the cylinder 100 can be prevented from leaking to the outside.

In the fastening operation of the fixing bolt 500, when the end of the fixing bolt 500 is screwed into the fastening hole 430 of the vibration-proof adapter 400 and screwed into the fixing hole of the cylinder 100, The flange portion 220 of the vibration isolating member 200 is coupled to be fixed to the outside of the cylinder 100.

Accordingly, the cap portion 210 of the vibration isolating member 200 is formed integrally with the flange portion 220, so that the cap portion 210 is combined with the cylinder 100 using the fixing bolt 500. The receiving part 212 closes the connector part 320 of the sensor 300 to the communication hole 110 side, so that the screw part 310 and the communication hole 110 are fastened by vibration generated when the hydraulic breaker is operated. Even when the state is released, it is possible to prevent the sensor 300 from being separated from the communication hole 110.

In addition, the vibration isolating member 200 provides a buffering function against the shock when the crushed rock piece acts on the sensor 300 as an external shock when the hydraulic breaker is operated.

Since the communication hole 110 is composed of stepped first and second communication holes 112 and 114, the threaded portion 310 of the sensor 300 is screwed into the second communication hole 114 and the first communication The end of the sensor 300 located inside the hole 112 is spaced apart from the inner wall 105 of the cylinder 100 and is located at a position spaced apart from the piston.

Accordingly, since the end of the sensor 300 is spaced apart from the inner wall 105 of the cylinder 100, interference with a groove groove (not shown) formed in the inner wall 105 of the cylinder 100 It can be avoided.

According to an embodiment of the present invention, the screw portion 310 of the sensor 300 is screwed and bonded to the communication hole 110 to be firmly coupled, and by using the anti-vibration adapter 400 and the fixing bolt 500 Separation of the anti-vibration member 200 can be prevented, and even when the coupling state between the sensor 300 and the communication hole 110 is released by minimizing shock or vibration transmitted to the sensor 300 when the hydraulic breaker is operated, the sensor 300 ) By preventing the separation, it is possible to accurately sense the stroke position of the piston 150, and has a useful advantage of improving the durability of the sensor 300 product.

In addition, since the communication hole 110 of the present invention is composed of stepped first and second communication holes 112 and 114, one end of the sensor 300 is spaced apart from the piston 150 accommodated in the cylinder 100 by an appropriate sensing interval. It has the advantage of being able to limit the moving distance of the sensor 300 as easily as possible.

The following description relates to another embodiment of the present invention, and the same reference numerals are used for the same components as those of the previous embodiment, and redundant descriptions will be omitted.

6 to 8 are views showing another embodiment of a sensor fixing structure for a hydraulic breaker according to the present invention, the configuration of which is a communication hole 110 formed to communicate the outside and the inside of the cylinder 100 of the hydraulic breaker; Stepped first and second fitting portions 252 and 254 and a coupling flange 256 having a diameter larger than that of the second fitting portion 254 are formed on the outer circumferential surface, and the first and second fitting portions 252 and 254 are formed in the communication hole ( A locking hole 257 that is fitted into the interior of 110 and in which the screw portion 310 of the sensor 300 is screwed is formed in the center, and a vibration isolator 200A made of a material softer than the material of the cylinder 100; A sensor 300 having a threaded portion 310 formed on the outer circumferential surface so as to be screwed into the fastening hole 257 and connected to the other end thereof by a connector portion 320; An airtight means 600 for maintaining airtightness between the sensor 300 and the receiving portion 212 of the vibration isolator 200A; A fastening hole 430 is formed on the edge of the inner circumferential surface of the connection hole 260 formed in the coupling flange 256 and fastened to the fixing bolt 500 in the center, and is made of a harder material than the vibration isolator 200A. Adapter 400; And a fixing bolt 500 that is fastened to the fastening hole 430 and screwed to the cylinder 100 to fix the vibration isolator 200A to the cylinder 100.

The communication hole 110 is formed of first and second communication holes 112 and 114 stepped so that the first and second fitting portions 252 and 254 are fitted, and the inner circumferential surface of the second communication hole 114 and the vibration isolator ( The outer peripheral surface of the second fitting portion 254 of 200A) may be bonded to each other by a bonding solution.

6 and 7, the vibration isolator 200A has first and second fitting portions 252 and 254 having different diameters on one side, and a coupling flange 256 is formed on the other side of the second fitting portion 254 ) Has a structure formed to extend from the other end.

The fastening hole 257 of the vibration isolator 200A has a structure in which a fixing spiral part 257a having a female thread formed thereon so as to be screwed with the threaded part 310 of the sensor 300 is formed.

More preferably, in order to securely fix the sensor 300 and the vibration isolator 200A, a bonding solution is applied to the fixing spiral portion and the screw portion 310 of the sensor 300 and the fastening portion 410 to be bonded.

A connection hole 260 is formed in the coupling flange 256 of the vibration isolating hole 200A to fix the fixing bolt 500, and a vibration isolating adapter 400 inserted into the inner circumference of the connection hole 260 is screwed. It has a fastening structure.

The anti-vibration adapter 400 is fitted to the edge of the inner circumferential surface of the connection hole 260 and has a fastening hole 430 in which the fixing bolt 500 is fastened, and is made of a harder material than the anti-vibration hole 200A. .

In addition, the anti-vibration adapter 400 has a fastening portion 410 that is screwed to the inner peripheral surface of the connection hole 260 on one outer circumferential surface, and a large-diameter groove 265 formed to extend to the outside of the connection hole 260 on the other side. ) Has a structure in which the head portion 420 accommodated in it is formed.

The vibration isolating adapter 400 has a clearance gap corresponding to the contraction width of the coupling flange 256 of the vibration isolating hole 200A, as in the previous embodiment, so that the width of the vibration isolating adapter 400 is It is formed shorter than the thickness of 256).

The airtight means 600 includes a first sealing material 610 that maintains airtightness of the gap between the vibration isolator 200A and the second communication hole 114, and a fastening hole 257 of the vibration isolator 200A and a sensor It consists of a second sealing material 620 that maintains the airtight gap between the (300).

Another embodiment of the present invention having such a configuration, referring to Figs. 6 and 8, the first and second fitting portions 252 and 254 of the vibration isolator 200A are inserted into the interior of the communication hole 110 to be fitted, The anti-vibration hole 200A is fixed by screwing the fixing bolt 500 into the fixing hole 430 of the vibration-proof adapter 400 and the fixing hole of the cylinder 100 coupled within the connection hole 260 of the coupling flange 256. Let it.

Subsequently, the sensor 300 is coupled by screwing while inserting the threaded portion 310 of the sensor 300 into the fastening hole 257 of the vibration isolator 200A.

At this time, the first fitting portion 252 of the vibration isolator 200A is fitted into the first communication hole 112 of the communication hole 110, and the second fitting portion 254 is the second communication hole It is combined to fit in (114).

In order to securely fix the vibration isolator 200A, a bonding solution is applied between the outer circumferential surface of the second fitting part 254 and the inner circumferential surface of the second communication hole 114 to be bonded.

The bond solution may be applied to the inner circumferential surfaces of the first fitting portion 252 and the first communication hole 112, but the second communication hole 114 having an inner diameter larger than that of the first communication hole 112 Since it is easy to apply the coating to the inner circumferential surface and there is a possibility that the bonding liquid may flow into the cylinder 100, it is preferable to apply it to the outer circumferential surfaces of the second communication hole 114 and the second fitting part 254.

In addition, while the vibration-proof adapter 400 is coupled into the connection hole 260 of the coupling flange 256 of the vibration-proof hole 200A, the coupling portion 410 of the vibration-proof adapter 400 becomes the connection hole ( It is screwed to 260, the head portion 420 is coupled to be accommodated in the large-diameter groove portion 265.

The fixing bolt 500 is entered through the fastening hole 430 of the vibration-proof adapter 400 and is screwed, and screwed into the fixing hole of the cylinder 100 so that the vibration isolating hole 200A is attached to the cylinder 100. It performs the function of firmly fixing.

Therefore, in another embodiment of the present invention, in the process of coupling the sensor 300 to the communication hole 110 of the cylinder 100, the threaded portion 310 of the sensor 300 is coupled to the inside of the communication hole 110 and the sensor By combining the connector part 320 of 300 to be exposed to the outside of the communication hole 110 and the vibration isolator 200A, external shock or vibration transmitted to the sensor 300 side by using the vibration isolator 200A It can be attenuated, and by using the fixing bolt 500 and the vibration-proof adapter 400, the vibration isolator 200A is firmly fixed to the cylinder 100 to accurately sense the stroke position of the piston, and the separation of the sensor 300 It can be prevented, and has a useful advantage of improving the durability of the sensor 300 product.

As described above, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention is limited to the embodiments described above and should not be limited, and should be determined by the claims and equivalents as well as the claims to be described later.

That is, the present invention described above is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims Of course, various modifications are possible, and such modifications are within the scope of the description of the claims.

100: cylinder (of hydraulic breaker)
105: inner wall 110: communication hole
112: first communication hole 114: second communication hole
115: screw coupling portion 150: piston
200: anti-vibration member 210: cap portion
212: receiving part 215: through hole
220: flange portion 230: coupling hole
235: receiving groove 200A: dustproof port
252,254: 1st and 2nd fitting part
256: coupling flange 257: fastening hole
257a: fixed spiral part 260: connecting hole
265: large diameter groove 300: sensor
310: screw part 320: connector part
330: cable 400: dustproof adapter
410: fastening portion 420: head portion
430: fastening hole 500: fixing bolt
600: airtight means 610,620: first, second sealing material

Claims (7)

A communication hole 110 formed to communicate the outside and the inside of the cylinder 100 of the hydraulic breaker and provided with a screw coupling portion 115 having a female thread formed on the inner peripheral surface thereof;
A sensor 300 having a threaded portion 310 formed on the outer circumferential surface so as to be screwed into the screwing portion 115 of the communication hole 110 and connected to the other end portion by a connector portion 320;
A cap part 210 in which a receiving part 212 in a form surrounding the connector part 320 of the sensor 300 is formed and a through hole 215 is formed in the center so that the cable 330 passes, and the cap part 210 A vibration-proof member made of a soft material consisting of a flange portion 220 formed with a coupling hole 230 so as to be coupled to the outer wall of the cylinder 100 in which the communication hole 110 is formed and to be coupled to the outer wall of the cylinder 100 in which the communication hole 110 is formed (200); And
Including; an airtight means 600 for maintaining the airtightness of the gap between the sensor 300 and the cap portion 210,
The coupling means is fixed to the inner circumferential surface of the coupling hole 230 and a vibration-proof adapter 400 having a fastening hole 430 formed so that a fixing bolt 500 is screwed into the center,
A sensor fixing structure for a hydraulic breaker, characterized in that one end is composed of a fixing bolt (500) fastened to the fastening hole (430) and the cylinder (100). The method according to claim 1,
The vibration isolating member 200 is made of a urethane material, and the vibration isolating adapter 400 is a sensor fixing structure for a hydraulic breaker, characterized in that made of a monomer caster nylon material. The method according to claim 1,
The anti-vibration adapter 400 has a fastening part 410 formed with a male thread so as to be screwed with the coupling hole 230 on an outer circumferential surface, and a diameter larger than the fastening part 410 in an outer space spaced apart from the fastening part 410. The head portion 420 is provided,
A receiving groove portion 235 in which the head portion 420 is accommodated is formed outside the coupling hole 230,
A sensor fixing structure for a hydraulic breaker, characterized in that the receiving groove portion 235 and the head portion 420 are bonded to each other by a bonding liquid. The method according to claim 1,
A sensor fixing structure for a hydraulic breaker, characterized in that one end of the sensor 300 is disposed to be spaced apart from the inner wall 105 of the cylinder 100 with a predetermined gap toward the outside. The method according to claim 1,
The vibration isolating adapter 400 is a sensor fixing structure for a hydraulic breaker, characterized in that the width is formed shorter than the thickness of the flange portion 220 so as to have a clearance gap corresponding to the contraction width of the vibration isolating member (200). A communication hole 110 formed to communicate the outside and the inside of the cylinder 100 of the hydraulic breaker;
Stepped first and second fitting portions 252 and 254 and a coupling flange 256 having a diameter larger than that of the second fitting portion 254 are formed on the outer circumferential surface, and the first and second fitting portions 252 and 254 are formed in the communication hole ( A locking hole 257 that is fitted into the interior of 110 and in which the screw portion 310 of the sensor 300 is screwed is formed in the center, and a vibration isolator 200A made of a material softer than the material of the cylinder 100;
A sensor 300 having a threaded portion 310 formed on the outer circumferential surface so as to be screwed into the fastening hole 257 and connected to the other end thereof by a connector portion 320;
An airtight means 600 for maintaining airtightness between the sensor 300 and the receiving part 212 of the vibration isolator 200A;
A fastening hole 430 is formed on the edge of the inner circumferential surface of the connection hole 260 formed in the coupling flange 256 and fastened to the fixing bolt 500 in the center, and is made of a harder material than the vibration isolator 200A Adapter 400; And
A fixing bolt 500 which is fastened to the fastening hole 430 and is screwed to the cylinder 100 to fix the vibration isolator 200A to the cylinder 100; Structure. The method of claim 6,
The vibration-proof adapter 400 is bonded to the inner circumferential surface of the connection hole 260 of the coupling flange 256 with a bonding liquid.

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