KR102197884B1 - Breakers with Low Noise Structure - Google Patents

Abstract

The present invention relates to a breaker with a low noise structure for reducing a noise and vibration. The breaker comprises: a housing (H) having an inner cylinder (100) and a valve (500); a striking noise shielding unit (600); a bracket (800); and a noise and vibration shielding unit (900).

Description

Breakers with Low Noise Structure {Breakers with Low Noise Structure}

The present invention relates to a breaker, and specifically, a region impacted with a chisel by a piston and an upper surface side of the piston exposed to the backhead of the hydraulic breaker and the chisel are configured to be separable, but the contact portion generated by separating and combining Noise generated while the piston strikes the chisel in contact with the crushed object by simultaneously implementing the function of the sound absorbing material and the buffering function of nitrogen gas by filling various amounts of nitrogen gas together with the sound absorbing material according to the specifications of the hydraulic breaker. And it relates to a breaker having a low noise structure for reducing the vibration.

In general, a hammer or hydraulic breaker is widely used for constructing piles or crushing concrete, rock, etc. by mounting it on construction equipment such as an excavator (Excava-tor) and a loader (Loader).

The hammer or hydraulic breaker hits a chisel, which is a pile or crushing tool for construction, using a piston of a cylinder, thereby driving a pile or crushing concrete, rock, etc. by an impact force.

On the other hand, due to the reinforcement of noise regulations at construction sites, it is mandatory to display the noise level of construction machinery, and excavators, dozers, loaders, and breakers are included in the labeling requirements.

In addition, in order to designate an area within a certain distance from a residential area, apartment house, school, hospital, public library, etc. as a quiet area, and to perform a specific construction with a high noise level in accordance with the Ordinance of the Ministry of Environment in a quiet area, soundproofing facilities must be installed before the start of construction .

In order to avoid noise regulation, a low-noise type breaker has been developed to reduce noise by improving the hydraulic breaker to avoid noise regulation.

The noise generated during the operation of such a hydraulic breaker is the impact sound generated when the piston strikes the chisel, the vibration sound generated by the piston, chisel, and surrounding parts vibrating due to the impact, and the chisel can crush the object to be crushed. It can be distinguished by the shredding sound that occurs when it occurs.

In other words, when the piston strikes the chisel, a considerable hitting sound is generated from the cylinder forming the hydraulic breaker, and some of the hitting sound passes through the cylinder wall of the hydraulic breaker and propagates to the outside, and the rest is between the chisel and the upper bush, and between the chisel and the lower bush. It is propagated to the outside through the gap.

In addition, components such as pistons, chisels, cylinders and brackets that make up the hydraulic breaker vibrate due to the impact at the time of impact, resulting in vibration noise.

Therefore, when the piston strikes the crushed part by filling a sound absorbing material such as tin, urethane, mixed rubber, etc., or inserting and installing such a sound absorbing material into the piston at the front head side where the piston strike point is located in order to reduce even the internal noise, Various attempts have been made to absorb the generated noise.

Looking at the prior art for this,

Korean Patent Registration No. 10-2009413 discloses a low-noise breaker, and Korean Patent Registration No. 10-1230361 discloses a low-noise breaker having a noise reduction guide.

In addition, the Korean US Patent Registration No. 10-1775328 discloses a breaker equipped with a vacuum atmosphere.

The posted breaker includes a cylinder in which a piston is provided to reciprocate by a separate drive pump; A housing provided at a lower portion of the cylinder, penetrating along the vertical direction, and having a striking space formed therein; A striking unit provided inside the housing to seal the striking space from a lower portion, and receiving a blow from the piston and hitting a striking object at a lower end thereof; And a vacuum unit communicating with the striking space and controlling the interior of the striking space in a vacuum atmosphere to reduce noise when the piston strikes.

The vacuum breaker as described above has a structure to reduce noise by adjusting the vacuum atmosphere inside the striking space, but it is made in the shape of a cylinder, so it is difficult to expect a noise reduction effect.

In particular, since the seal part of the piston operated by the hydraulic pressure is exposed to the vacuum atmosphere, there is a problem that the lubricating oil leaks into the striking space. In addition, the striking space is a space for attenuating the noise, and does not significantly affect the increase of the striking force of the piston.

Meanwhile, Korean Patent Registration No. 10-1219299 discloses a driving machine, and Korean Patent Publication No. 10-2009-051629 discloses a driving machine including an active noise control device.

In addition, Korean Patent Application Publication No. 10-2011-0139967 discloses a low-noise breaker equipped with a rod guide for noise reduction, and Korean Patent Registration No. 10-128528 (20130705) discloses a hydraulic breaker having a low-noise vibration structure.

The posted low-noise breaker can reduce the noise caused by hitting, but the noise transmitted through the chisel, the noise due to the repulsive force when the rock is crushed by the chisel, and the hitting force when hitting the piston and chisel are transmitted to the breaker body. The vibration and noise generated cannot be reduced.

In addition, Korean Patent Registration No. 10-1197158 discloses a low-noise hydraulic breaker. The posted hydraulic breaker is a hydraulic cylinder; a piston installed inside the hydraulic cylinder; a front head coupled to the lower portion of the hydraulic cylinder; installed inside the front head, and a lower end protruding outside the front head and on the piston Chisel hit by; A striking chamber formed inside an upper end of the front head and in which a lower end of the piston and an upper end of the chisel are positioned; A transfer passage formed in the front head and connected to the striking chamber; an outflow noise shielding device located at a lower end of the front head and having a vibration/sound insulation chamber formed therein; It includes an actuator installed around the outflow noise shielding device.

Korean Patent Registration No. 10-1896100 discloses a low-noise perforator.

However, the conventional sound-absorbing structure used in the above technology has to be equipped with an expensive sound-absorbing material, so it leads to an increase in cost, increases the weight of the tool to reduce work efficiency, and absorbs when moisture etc. penetrate depending on the work or storage environment. Not only is the effect lowered and the life of the sound absorbing material is shortened, but it is also not easy to replace the sound absorbing material after its structure.

In addition, as one of the methods for reducing noise, in many cases, only the lower damper having high hardness is installed without the lower sound absorbing material under the hydraulic breaker cylinder. Even if the lower sound absorbing material is additionally installed, a material that is generally not elastic was used.

However, in the structure of a general hydraulic breaker, the position where the hitting part where the piston strikes the chisel and the object to be crushed are exposed is the lower part of the breaker cylinder, and a lower damper with high hardness is installed at the position where the noise and vibration caused by the blow are the most. As a result, there is a problem in that it is difficult to obtain the effects of leakage noise shielding and vibration damping due to the spacing and material characteristics between parts.

In addition, the conventional low-noise hydraulic breaker, which is known in the art, has both the cylinder and the frame corresponding to the main body in a box type, and the cylinder, which is the main body, is configured to be spaced apart from the inner wall of the frame by a certain distance, and the space between them is various In some cases, it is configured to be filled with sound-absorbing and sound-insulating agents, so that the shock and vibration absorbed through the tool during work are not directly transmitted to the main body and arm, but the noise generated by the impact of the piston and chisel is transmitted to the outside. In order to prevent transmission, a cover or sound-absorbing material is installed around it, and there is no reality to reduce the noise itself generated from the piston and chisel.

Domestic Patent Registration No. 10-2009413 Domestic Patent Registration No. 10-1230361 Domestic Patent Registration No. 10-1775328 Domestic Patent Registration No. 10-1219299 Korean Patent Publication No. 10-2009-051629 Korean Patent Publication No. 10-2011-0139967 Domestic Patent Registration No. 10-0128528 Domestic Patent Registration No. 10-1197158 Domestic Patent Registration No. 10-1896100

The present invention was conceived to solve the above-described other problems, and a hitting noise shielding part is provided in the hydraulic breaker cylinder along the area where the chisel is impacted by the piston, and exposed to the upper backhead of the hydraulic breaker. A backhead sound absorbing member is also formed on the upper surface of the piston, and the bracket provided at the connection part connected to the heavy equipment absorbs the vibration transmitted to the bracket before and after work, and the noise and vibration transmitted to the bracket when the piston strikes the chisel. It is an object of the present invention to provide a structure for reducing noise and vibration generated in the process of hitting a chisel in contact with a to-be-crushed object by configuring a noise-vibration shield that reduces vibration transmitted to the object.

In addition, the present invention is provided with a nitrogen filling unit in addition to the sound absorbing member of the hitting noise shielding unit and the noise vibration shielding unit to reduce heat and vibration generated to the sound absorbing member, and protect the tension of the valve to extend the valve life while simultaneously connecting to heavy equipment. Its purpose is to provide a breaker with a low noise structure that can extend the life of the equipment as well as work efficiency and economy by optimizing the reduction of vibration and noise by making it possible to fill nitrogen in accordance with the standard of hydraulic breaker. .

The present invention for achieving the above object,

"The cylinder 100 is provided inside, and the cylinder 100 is provided with a chisel 300 that is struck by a piston 200 that reciprocates by hydraulic pressure, descends with a certain stroke, and crushes the object to be crushed, A back head 110 is formed above the piston 200, and a housing (H) and a housing (H) provided with a valve 500 to switch and supply hydraulic pressure of high and low pressure for vertical reciprocation of the piston 200 ), the piston 200 is coupled at a predetermined position outside the hitting noise shield 600 surrounding the outside of the hitting area in order to shield the noise generated when the piston 200 hits the chisel 300 and the outside of the housing (H) The bracket 800 provided with the connection part 700 at the end and provided at a predetermined position of the bracket 800, the noise and vibration generated when the piston 200 strikes the chisel 300 and the connection part 700 It includes a noise and vibration shielding part 900 for shielding the noise and vibration generated from),
The hitting noise shielding part 600,
A plate 610 having a coupling groove 611 having a predetermined diameter in the center of the inner surface, an injection hole 612 is perforated in the center of the coupling groove 611, and having a flat plate shape on the outer surface;
It is inserted into the coupling groove 611 and is inserted into the insertion groove 120 formed on the outer surface of the cylinder 100 while being inserted into the through hole h formed in the housing H. The first valve hole 621 having a relatively smaller diameter than the injection hole 612 is perforated, and a receiving groove is formed on the inner surface thereof, but a partition member 623 made of synthetic resin material having elasticity is coupled to the receiving groove. And a noise shielding member 620 having a first nitrogen filling part 624 on the partition member 623 and a urethane layer 625 on the bottom; A breaker having a low noise structure including,

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The noise and vibration shielding part 900,

A plurality of flat plates in which a second valve hole 911 is drilled in the center and a bolt hole 912 is drilled in the outer circumferential surface of the bracket 800 as being in close contact with the coupling holes 801 drilled opposite to each other. (910); The inner side of the flat plate 910 is a cylindrical shape having a central opening and a bolt groove 921 matching the bolt hole 912 on the outer circumferential surface, and a plurality of first fastening grooves 922 on the cylindrical outer circumferential surface. A plurality of cylindrical coupling members 920 in which the first fastening protrusions 923 are alternately formed; In the center of the inner circumferential surface, a fitting portion 931 of a predetermined length is provided, and a plurality of cylindrical shapes in which second fastening grooves 932 and second fastening protrusions 933 are alternately formed on both sides of the fitting portion 931 A cover member 930; One side is a flat plate, and a fixing hole 941 is perforated on the outer circumferential surface to enable fastening of the bolt (V) and nut (N), and a through hole (942) is drilled in the center, and the third fastening groove on the outer circumferential surface in a cylindrical shape on the other side. A plurality of closing members 940 in which the 943 and the third fastening protrusions 944 are alternately formed; A plurality of diaphragms 950 having a second nitrogen filling portion 951 in a'C' shape coupled to the inside of the cylindrical coupling member 920 and the closing member 940; A breaker having a low noise structure including,

The cover member 930 is a breaker having a low noise structure, characterized in that the outer circumferential surfaces of both sides are formed to be inclined upward in the shape of a cylindrical ring,

The cover member 930 is a breaker having a low noise structure, characterized in that made of a rubber material capable of elasticity and vibration,

A breaker having a low noise structure including a backhead sound absorbing member 220 provided on an upper surface side of the piston 200 exposed to the backhead 110,

A breaker having a low noise structure including an annular backhead sound absorbing member 220 that has an annular groove 210 formed on the upper surface of the piston 200 and is press-fit into the groove 210,

A breaker having a low noise structure including forming annular grooves 221 on the inner and outer surfaces of the backhead sound absorbing member 220, respectively,

Rigid supplements 711 which are inserted into connection holes 701 which are respectively perforated at both ends of the connection part 700 and include connection pins 710 for connecting with clamps of heavy equipment, and are provided on the outer peripheral surfaces of both ends of the connection pin 710 ); A bush 713 fitted outside the rigid supplement 711; A circular ring 714 surrounding the outside of the bush 713 and directly in contact with the inner circumferential surface of the connection hole 701 and supported; A stopper 712 made of a urethane material provided and fixed at both ends of the connection pin 710 protruding outward from the connection hole 701; A breaker having a low noise structure including,

A multi-stage concave groove 230 configured to have an inner diameter smaller as it enters the upper surface side of the piston 200; A piston absorbing member 240 inserted into the multi-stage concave groove 230; An end member 250 that covers an upper surface of the piston 200 and is fixed to fix the piston sound absorbing member 240; A breaker having a low noise structure including,

The piston sound absorbing member 240,

A hollow ring member 241 in which an inner diameter corresponding to the lowermost end of the multi-stage concave groove 230 is fitted into a relatively small groove; A rigidity supplementing member 243 having an insertion protrusion 242 for insertion into the ring member 241 and seated in the stepped 231 of a groove having a relatively large inner diameter among the multi-stage concave grooves 230; A sealing member 244 provided on the upper surface of the rigidity supplementing member 243; A breaker having a low noise structure including,

First and second tapered portions 245 and 246 are respectively tapered in the inner direction from both sides of the sealing member 244 and are axially piped, respectively, and the first and second tapered portions 245 and 246 are divided, and the sealing member 244 ) A breaker having a low-noise structure including that consisting of a link portion 247 for cross-linking the inside,

The taper angle of the first tapered part 245 is formed to be relatively smaller than the angle of the second tapered part 246, and the tapered surface length of the first tapered part 245 is the second tapered part 246 The above object can be achieved by constituting a "breaker having a low noise structure including that formed relatively longer than the length of the tapered surface of).

According to the present invention, in the process of crushing an object to be crushed using a hydraulic breaker, the chisel hits the object to be crushed in response to the reciprocating motion of the piston in the vertical stroke distance of the piston according to the supply of high pressure and low pressure circulation into the cylinder. By effectively blocking the noise source generated during the operation, it has the effect of reducing the noise spreading to the surroundings.

In addition, according to the present invention, a nitrogen filling part is provided in addition to the sound-absorbing member of the hitting noise shielding part and the noise vibration shielding part to reduce heat and vibration transmitted to the sound-absorbing member, and protect the tension of the bolt to extend the life of the bolt while simultaneously connecting to heavy equipment. It has the effect of optimizing the reduction of vibration and noise by optimizing the reduction of vibration and noise and extending the life of the equipment as well as the efficiency and economy of work by making it possible to fill nitrogen in accordance with the specifications of the hydraulic breaker.

1 is a schematic cross-sectional view of a breaker having a low noise structure according to the present invention,
Figure 2 is an enlarged view showing the coupling and separation state of a cylinder and a piston and chisel structure provided therein, and a strike noise shield for shielding noise generated when the piston strikes the chisel in the breaker having a low noise structure according to the present invention Outline Drawing,
3 is a bracket provided at a connection part connected to heavy equipment in a breaker having a low noise structure according to the present invention, absorbs vibration transmitted to the bracket before and after work and noise and vibration transmitted to the bracket when the piston strikes the chisel and transmits it to the connection pin. A cross-sectional view of the noise and vibration shielding part that reduces the vibration that is generated,
4 is an exploded perspective view of the noise and vibration shielding part in the breaker having a low noise structure according to the present invention,
Figure 5 is a view showing a schematic cross-section of the present invention in a breaker having a low noise structure in a state provided with a back head sound absorbing member toward the upper surface of the piston;
6 is a view showing another embodiment including a piston absorbing member on the upper surface of the piston in the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in the present specification are exemplified only for the purpose of describing the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention are Since various changes can be added and may have various forms, all changes, equivalents, or substitutes included in the spirit and scope of the present invention are included, and terms or words used in the specification and claims are conventional or dictionary. The meaning and concept consistent with the technical idea of the present invention are not limited to the meaning, and based on the fact that the inventor can appropriately define the concept of terms in order to describe his own invention in the best way. Should be interpreted as. Accordingly, the embodiments described in the specification of the present invention and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, but are substituted at the time of filing of the present invention. It will be understood that various equivalents and variations that may be made are possible or exist.

In addition, unless otherwise defined in the specification of the present invention, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Have. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this specification. Does not.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a schematic cross-sectional view of a breaker having a low noise structure according to the present invention, and FIG. 2 is a cylinder and a piston and chisel structure provided therein in a breaker having a low noise structure according to the present invention, and noise generated when the piston strikes the chisel It is a schematic diagram showing an enlarged view of the coupling and separation state of the hitting noise shielding part for shielding, and FIG. 3 is a bracket provided at a connection part connected to heavy equipment in a breaker having a low noise structure according to the present invention, vibration and piston transmitted to the bracket before and after work The combined cross-sectional view of the noise and vibration shielding part that absorbs the noise and vibration transmitted to the bracket when striking the chisel to reduce the vibration transmitted to the connection pin, and FIG. 4 is a separation of the noise and vibration shielding part from a breaker having a low noise structure according to the present invention. It is a perspective view, and FIG. 5 is a schematic cross-sectional view showing a state in which a back head sound absorbing member is provided on the upper surface of the piston in a breaker having a low noise structure according to the present invention, and FIG. 6 is another diagram including a piston sound absorbing member toward the upper surface of the piston in the present invention. It is a diagram showing an embodiment.

As described above, the present invention reduces noise generated when performing a work for crushing an object to be crushed using the chisel 300 of the hydraulic breaker 1, and a nitrogen filling part at the part of the bracket 800 connected to the heavy equipment. It is equipped to reduce the generation of heat and vibration transmitted to the sound-absorbing member, and protect the tension of the bolt to extend the life of the bolt, and at the same time, optimize the reduction of vibration and noise by making it possible to fill nitrogen in accordance with the standard of hydraulic breakers connected to heavy equipment. Thus, it provides a configuration that can extend the life of the equipment as well as work efficiency and economy.

In the present invention, in order to crush an object to be crushed by the chisel 300, after the lower end of the piston 200 impacts the upper end of the chisel 300, the impact force is transmitted to the chisel 300, and at the same time, the tip of the chisel 300 is It will be crushed by hitting.

In the process, considerable noise is generated, and the part that is notable as the source of the noise is that the piston 200 moves up and down in the cylinder 100 according to the conversion of hydraulic pressure provided at high and low pressure, and the chisel 300 at the bottom is ) Noise generated when hitting the upper surface and the impact force propagated to the upper end of the piston 200 to generate noise in the gas filling chamber 111 of the backhead 110, and the connection part 700 connected to heavy equipment The bracket 800 provided in the connection pin 710 by absorbing the vibration transmitted to the bracket 800 before and after work and the noise and vibration transmitted to the bracket 800 when the piston 200 strikes the chisel 300 It can be divided into vibration and noise transmitted to.

In addition, noise generated when the chisel 300 strikes the crushed object has a characteristic of propagating through the chisel 300.

First, the present invention has a configuration as shown in FIG. 1.

The indicator H indicates a housing, and the housing (H) is provided with a cylinder (100) inside the cylinder (100) and is hit by a piston (200) reciprocating by hydraulic pressure to achieve a constant stroke. A chisel 300 descending and crushing an object to be crushed is provided, and a back head 110 is formed above the piston 200, and a valve ( 500) is provided,

As shown in FIG. 2, the designation 600 indicates a blow noise shield and is coupled at a predetermined position outside the housing (H) to shield the noise generated when the piston 200 strikes the chisel 300. As a structure surrounding the outside of the hitting area in order to,

Specifically,

The hitting noise shielding part 600,

A plate 610 having a coupling groove 611 having a predetermined diameter in the center of the inner surface, an injection hole 612 is perforated in the center of the coupling groove 611, and having a flat plate shape on the outer surface;

It is inserted into the coupling groove 611 and is inserted into the insertion groove 120 formed on the outer surface of the cylinder 100 while being inserted into the through hole h formed in the housing H. The first valve hole 621 having a relatively smaller diameter than the injection hole 612 is perforated, and a receiving groove is formed on the inner surface thereof, but a partition member 623 made of synthetic resin material having elasticity is coupled to the receiving groove. And a noise shielding member 620 having a first nitrogen filling part 624 on the partition member 623 and a urethane layer 625 on the bottom; It is a structure that includes.

Specifically, the hydraulic breaker 1 is provided with a cylinder 100 provided in the housing H, and a back head 110 filled with gas, etc., on the upper portion of the cylinder 100, and the cylinder 100 A piston 200 reciprocating by hydraulic pressure inside is provided.

Meanwhile, a chisel 300 descending by a certain stroke by the piston 200 and crushing through direct contact with the to-be-crushed object is provided in the cylinder 100 in a state adjacent to the piston 200, the chisel 300 The front end of the housing (H) constituting the exterior of the hydraulic breaker (1) is exposed to the lower end.

In addition, a valve 500 is configured outside the cylinder 100 in order to convert and supply high pressure and low pressure hydraulic pressure and control the vertical reciprocating motion of the piston 200.

In the present invention, as shown in Figure 2, in order to shield the noise generated when the piston 200 strikes the chisel 300, the piston 200 strikes the chisel 300, the hitting area Constructs a hitting noise shield 600 for wrapping.

The hitting noise shielding part 600 constitutes a plate 610 and an accommodation groove protruding into the inside of the plate 610 and incorporating the noise shielding member 620.

In addition, in order to insert the noise shielding member 620 through the outside of the cylinder 100 so that the receiving groove part can shield the hitting area of the cylinder 100, an insertion groove ( 120).

Therefore, the region of the insertion groove 120 forms the same position as the hitting region.

On the other hand, the noise shielding member 620 is configured to surround the impact area of the cylinder 100 by passing through the housing (H) that is spaced apart from the outer periphery of the cylinder (100), which penetrates the housing (H). A hole (h) is formed, and a receiving groove protruding to the inside of the noise shielding member 620 is penetrated toward the through hole (h), but the plate 610 outside the noise shielding member 620 is formed on the surface of the housing (h). After making contact with, the plate 610 and the surface of the housing H are fixed using fixing means such as bolts.

In this way, the receiving groove protruding to the inside of the noise shielding member 620 passes through the through hole h of the housing H and is fixed to the outer surface of the housing H by the plate 610, and at the same time, the receiving groove The portion has a structure that is inserted into the insertion groove portion 120 formed as the outer surface of the cylinder 100.

With the above structure, the piston 200 provided inside the cylinder 100 strikes the object to be crushed by vertical movement and strikes the upper end of the chisel 300 to crush the noise. By configuring to be wrapped by the member 620, it is possible to block the propagation of noise generated when the impact between the piston 200 and the chisel 300 to the outside.

On the other hand, the noise shielding member 620 is a first nitrogen filling portion 624 filled with nitrogen gas through the first valve hole 621, as described above, is provided with a urethane layer 625, the By filling the first nitrogen filling part 624 with nitrogen, it reduces the generation of heat and vibration transmitted to the urethane layer 625, and protects the tensile force of the valve installed in the first valve hole 621 and protects the life of the valve. It can be extended, and in particular, by making it possible to fill nitrogen in accordance with the specifications of the hydraulic breaker 1, it is possible to optimize the reduction of vibration and noise, thereby extending the life of the equipment as well as the efficiency and economy of work.

On the other hand, it is preferable that the valve fastened to the first valve hole 621 is a charging valve.

Next, the reference numeral 800 indicates a bracket, and as shown in FIGS. 1 and 3, the bracket 800 is provided with a connection part 700 at the outer end of the housing H, and both sides of the bracket 800 The coupling hole 801 perforated opposite to is formed.

Reference numeral 900 indicates a noise and vibration shielding unit, and as shown in Figs. 3 and 4, the noise and vibration shielding unit 900 is provided at a predetermined position of the bracket 800, and the piston 200 is As a structure for shielding the noise and vibration generated when hitting the chisel 300 and the noise and vibration generated from the connection part 700,

The noise and vibration shielding part 900,

A plurality of flat plates in which a second valve hole 911 is drilled in the center and a bolt hole 912 is drilled in the outer circumferential surface of the bracket 800 as being in close contact with the coupling holes 801 drilled opposite to each other. (910);

The inner side of the flat plate 910 is a cylindrical shape having a central opening and a bolt groove 921 matching the bolt hole 912 on the outer circumferential surface, and a plurality of first fastening grooves 922 on the cylindrical outer circumferential surface. A plurality of cylindrical coupling members 920 in which the first fastening protrusions 923 are alternately formed;

In the center of the inner circumferential surface, a fitting portion 931 of a predetermined length is provided, and a plurality of cylindrical shapes in which second fastening grooves 932 and second fastening protrusions 933 are alternately formed on both sides of the fitting portion 931 A cover member 930;

One side is a flat plate, and a fixing hole 941 is perforated on the outer circumferential surface to enable fastening of the bolt (V) and nut (N), and a through hole (942) is drilled in the center, and the third fastening groove on the outer circumferential surface in a cylindrical shape on the other side. A plurality of closing members 940 in which the 943 and the third fastening protrusions 944 are alternately formed;

A plurality of diaphragms 950 having a second nitrogen filling portion 951 in a'C' shape coupled to the inside of the cylindrical coupling member 920 and the closing member 940; It is a structure that includes.

Preferably, the cover member 930 has a cylindrical ring shape, and both outer circumferential surfaces are formed to be inclined in the upper outer outer direction,

The reason for this inclined is to facilitate close contact with the cylindrical coupling member 920.

Further, the cover member 930 is made of a rubber material capable of elasticity and vibration, and prevents damage due to separation between components from vibration or noise during operation, and ultimately has an elastic force and has a vibration-proof effect. It is to minimize vibration and noise by absorbing it during vibration noise.

Next, the noise and vibration shielding part 900 combines the closing member 940 and the cylindrical coupling member 910 with the cover member 920 as shown in Figs. 3 and 4, but the coupling is, the cylindrical coupling member The second fastening protrusion 933 provided on one side of the cover member 930 is fastened to the first fastening groove 922 of 920, and naturally the first fastening protrusion 923 also fastens the second fastening groove 932 Afterwards, when the second fastening protrusion 933 provided on the other side of the cover member 930 is fastened to the third fastening groove 943 of the closing member 940, the second fastening groove 932 is naturally fastened to the third. Since it is fastened to the protrusion 943, the closing member 940, the cylindrical coupling member 910, and the cover member 920 are coupled, and at this time, the closing member 940 and the cylindrical coupling member 910 by the fitting portion 931 Separation occurs between the liver.

In such a coupled state, the diaphragm 950 is inserted into the closing member 940 and the cylindrical coupling member 910, and then the flat plate 910 is coupled to the cylindrical coupling member 910, but FIGS. 3 and 4 In the coupling of the components as described above, a plurality of plates are formed so as to contact between the flat plates of the closing member 940 and integrated using bolts (V) and nuts (N) on the outer circumferential surface of the flat plate, and then the coupling hole 801 After inserting it with a bolt (V), it is fixedly coupled.

After assembling as described above, the vibration transmitted to the bracket 800 before and after operation and the noise and vibration transmitted to the bracket 800 when the piston 200 strikes the chisel 300 is absorbed, and the connection pin 710 of the heavy equipment The vibration and noise transmitted to the device is reduced.

On the other hand, by providing the first and second nitrogen filling portions 624 and 951, it is intended to solve the shortcomings or problems of the effects that are caused by simply providing a sound absorbing member or a shielding member in the related art, that is, a sound absorbing member provided with a nitrogen filling portion. The efficiency of work by optimizing the reduction of vibration and noise by reducing the generation of heat and vibration transmitted to the body and protecting the tension of the bolt to extend the life of the bolt and at the same time make it possible to fill nitrogen in accordance with the specifications of the hydraulic breaker connected to heavy equipment. It is intended to extend the life of the equipment in addition to economic efficiency.

Next, a gas filling chamber 111 is usually configured in the backhead 110 configured as the upper end of the hydraulic breaker 1, and the piston 200 strikes the chisel 300 and the chisel 300 is avoided. The noise generated when striking and hitting the crushed material is propagated to the outside of the cylinder 100 and at the same time, the noise is propagated to the backhead 110 side.

In order to shield the noise propagating through the backhead 110 as described above, in the present invention, as shown in FIG. 5, the backhead absorbing member 220 is provided on the upper surface side of the piston 200.

That is, in detail, as shown in FIG. 5, an annular groove 210 is formed on the upper surface of the piston 200, and the annular backhead absorbing member 220 is press-fit into the groove 210.

The backhead sound absorbing member 220 has an annular groove 221 formed on an outer circumferential surface and an inner circumferential surface, respectively, so that it can exhibit elasticity and elasticity when it is pressed into and fixed to the concave groove 210, and is not easily separated by external force after press-fitting. It is possible to prevent the noise from propagating toward the gas filling chamber 111 of the backhead 110 by exerting a close contact force with the inner circumferential surface of the groove 210 by elasticity and elasticity.

On the other hand, in the present invention, the configuration of the backhead sound absorbing member 220 may be configured differently as shown in FIG. 6. In the present embodiment, the piston sound absorbing member 240 is designated and indicated with different reference numerals.

That is, the piston sound absorbing member 240 forms a multistage concave groove 230 whose inner diameter decreases as it enters the upper surface side of the piston 200, and is inserted into the multi-stage concave groove 230 ( 240), and to fix the piston absorbing member 240, the cover member 250 covering the upper surface of the piston 200 is fixed.

As a sound-absorbing member provided on the upper surface of the piston 200, it is named and described as the backhead sound-absorbing member 220 in the above-described embodiment, but in this embodiment it is named as the piston sound-absorbing member 240, and names and symbols are separated. I did.

However, the backhead sound absorbing member 220 and the piston sound absorbing member 240 are the same and similar in that they all play a role to offset noise and vibration generated when the piston 200 strikes the chisel 300. Do.

On the other hand, the piston sound absorbing member 240 is fitted with a hollow ring member 241 inserted into a groove having a relatively small inner diameter corresponding to the lowermost end of the multi-stage concave groove 230, and the inside of the ring member 241 It has an insertion protrusion 242 for insertion into the multi-stage concave groove 230, and has a rigidity supplementing member 243 that is seated on the stepped 231 of a groove having a relatively large inner diameter, and the rigidity supplementing member 243 ) Includes that the sealing member 244 is provided on the upper surface.

As shown in FIG. 4, the sealing member 244 is tapered from both sides in the inward direction and constitutes first and second tapered portions 245 and 246, respectively, in the form of a shaft pipe, and the first and second tapered portions 245 and 246 It has a connecting portion 247 that partitions and cross-connects the inside of the sealing member 244.

Meanwhile, the taper angle of the first tapered part 245 is formed to be relatively smaller than the angle of the second tapered part 246, and the tapered surface length of the first tapered part 245 is the second tapered part ( 246) is formed to be relatively longer than the length of the tapered surface.

It is preferable that the ring member 241 and the sealing member 244 are made of an NBR material.

NBR is Acrylonitrile Butadiene Runner (acrylonitrile butadiene), commonly referred to as nitrile rubber, and refers to a material with excellent oil resistance and rust resistance and stable heat resistance.

In addition, the hydraulic breaker 1 is commonly used in connection with a clamp part of heavy equipment (not shown), and the connection part 700 of the hydraulic breaker 1 connected to the clamp of heavy equipment is a connection pin ( 710).

However, in the conventional case, there is a problem in that the crushing operation is performed while being connected by the connection pin 710 between the clamp and the hydraulic breaker 1 or noise due to collision between the connection pin 710 and the clamp during movement is significantly generated.

In order to overcome this point, the present invention provides a connection pin 710 for connecting with a clamp (not shown) through the connection hole 701 of the connection part 700 as shown in FIG. 1, but the connection pin 710 is A stiffness supplement 711 is provided on the outer circumferential surfaces of both ends, and a bush 713 is formed outside the stiffness supplement 711, and a circular ring 714 is formed outside the bush 713 to form a connection hole 710 ) It is configured to be supported in direct contact with the inner circumferential surface, and a stopper 712 made of urethane material is configured at both ends of the connection pin 710 protruding outward from the connection hole 710.

According to the present invention as described above, in the process of crushing an object to be crushed using a hydraulic breaker, the chisel responds to this by the reciprocating movement of the piston in the vertical stroke distance of the piston according to the supply of high and low pressure circulation of hydraulic pressure into the cylinder. By effectively blocking the noise source generated when the sound is hit, it has the effect of reducing the noise that spreads to the surroundings. In addition, in addition to the sound absorbing member of the hitting noise shielding part and the noise vibration shielding part, a nitrogen filling part is provided to the sound absorbing member. Reduces the generation of heat and vibration transmitted and protects the tension of the bolt, prolongs the life of the bolt, and at the same time makes it possible to fill nitrogen in accordance with the specifications of the hydraulic breaker connected to heavy equipment. In addition to economic efficiency, it has the effect of extending the life of the equipment.

As described above, although the present invention has been described by a limited embodiment and drawings, the present invention is not limited to the above embodiment, as well as from the above description by a person having ordinary technical knowledge in the field to which the present invention belongs. It goes without saying that various modifications and variations may be possible.

Therefore, the technical idea in the present invention should be grasped by the claims described below, but it will be apparent that all of the equivalent or equivalent modifications thereof belong to the scope of the technical idea of the present invention.

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One; Hydraulic breaker 100; cylinder
110; Backhead 111; Gas filling room
120; Insertion recess 200; piston
210; Groove 220; Backhead sound absorbing member
221; Annular groove 230; Multi-stage concave groove
231; Stepped 240; Piston absorbing member
241; Ring member 242; Insertion protrusion
243; Rigid complementary member 244; Sealing member
245; A first tapered portion 246; 2nd taper part
247; Link unit 250; End member
300; Chisel 500; valve
600; Hitting noise shielding part 610; plate
611; Coupling groove 612; Injection hole
620; Noise shielding member 621; 1st valve hole
623; Partition member
624; A first nitrogen filling unit 625; Urethane layer
700; Connection 701; Connector
710; Connecting pin 711; Stiffness supplement
712; Stopper 713; bush
714; Circular ring 800; Brackets
801; Coupling hole 900; Noise and vibration shield
910; Flat plate 911; 2nd valve hole
912; Bolt hole 920; Cylindrical coupling member
921; Bolt groove 922; 1st fastening groove
923; A first fastening protrusion 930; Cover member
931; Fitting 932; 2nd fastening groove
933; A second fastening protrusion 940; Finishing member
941; Fixed hole 942; Through hole
943; Third fastening recess 944; 3rd fastening protrusion
950; Diaphragm 951; 2nd nitrogen filling part
H; Housing h; Through hole

Claims (13)

A cylinder 100 is provided inside, and a chisel 300 is provided inside the cylinder 100 by being hit by a piston 200 that reciprocates by hydraulic pressure, descending at a certain stroke, and crushing the object to be crushed. A back head 110 is formed on the upper part of the piston 200, and a housing (H) and the housing (H) provided with a valve 500 to switch and supply hydraulic pressure of high and low pressure for vertical reciprocation of the piston 200 The piston 200 is coupled at a predetermined position outside of the hitting noise shield 600 surrounding the outside of the hitting area to shield the noise generated when the piston 200 hits the chisel 300 and the outer end of the housing (H) Noise and vibration generated when the piston 200 hits the chisel 300 and the connection part 700 is provided at a predetermined position of the bracket 800 provided with the connection part 700 and the bracket 800 It includes a noise and vibration shielding part 900 for shielding the noise and vibration generated from the,
The hitting noise shielding part 600,
A plate 610 having a coupling groove 611 having a predetermined diameter in the center of the inner surface, an injection hole 612 is perforated in the center of the coupling groove 611, and having a flat plate shape on the outer surface;
It is inserted into the coupling groove 611 and is inserted into the insertion groove 120 formed on the outer surface of the cylinder 100 while being inserted into the through hole h formed in the housing H. The first valve hole 621 having a relatively smaller diameter than the injection hole 612 is perforated, and a receiving groove is formed on the inner surface thereof, but a partition member 623 made of synthetic resin material having elasticity is coupled to the receiving groove. And a noise shielding member 620 having a first nitrogen filling part 624 on the partition member 623 and a urethane layer 625 on the bottom; Breaker having a low noise structure comprising a.
delete The method of claim 1,
The noise and vibration shielding part 900,
A plurality of flat plates in which a second valve hole 911 is drilled in the center and a bolt hole 912 is drilled in the outer circumferential surface of the bracket 800 as being in close contact with the coupling holes 801 drilled opposite to each other. (910);
The inner side of the flat plate 910 is a cylindrical shape having a central opening and a bolt groove 921 matching the bolt hole 912 on the outer circumferential surface, and a plurality of first fastening grooves 922 on the cylindrical outer circumferential surface. A plurality of cylindrical coupling members 920 in which the first fastening protrusions 923 are alternately formed;
In the center of the inner circumferential surface, a fitting portion 931 of a predetermined length is provided, and a plurality of cylindrical shapes in which second fastening grooves 932 and second fastening protrusions 933 are alternately formed on both sides of the fitting portion 931 A cover member 930;
One side is a flat plate, and a fixing hole 941 is perforated on the outer circumferential surface to enable fastening of the bolt (V) and nut (N), and a through hole (942) is drilled in the center, and the third fastening groove on the outer circumferential surface in a cylindrical shape on the other side. A plurality of closing members 940 in which the 943 and the third fastening protrusions 944 are alternately formed;
A plurality of diaphragms 950 having a second nitrogen filling portion 951 in a'C' shape coupled to the inside of the cylindrical coupling member 920 and the closing member 940; Breaker having a low noise structure comprising a.
The method of claim 3,
The cover member 930 has a cylindrical ring shape, and both outer circumferential surfaces thereof are formed to be inclined in an upward direction outside the breaker.
The method of claim 3,
The cover member 930 is a breaker having a low noise structure, characterized in that made of a rubber material capable of elasticity and vibration. The method of claim 1,
A breaker having a low noise structure comprising a backhead absorbing member 220 provided on an upper surface side of the piston 200 exposed to the backhead 110.
The method of claim 1,
An annular groove 210 is formed toward the upper surface of the piston 200,
A breaker having a low noise structure including an annular backhead sound absorbing member 220 that is press-fitted into the groove 210.
The method according to any one of claims 6 or 7,
A breaker having a low noise structure comprising forming annular grooves 221 on the inner and outer surfaces of the backhead sound absorbing member 220, respectively.
The method of claim 1,
The connection part 700 is inserted into the connection hole 701, which is respectively perforated at both ends, and includes a connection pin 710 for connecting with a clamp of heavy equipment,
A rigid supplement 711 provided on the outer peripheral surfaces of both ends of the connection pin 710;
A bush 713 fitted outside the rigid supplement 711;
A circular ring 714 surrounding the outside of the bush 713 and directly in contact with the inner circumferential surface of the connection hole 701 and supported;
A stopper 712 made of a urethane material provided and fixed at both ends of the connection pin 710 protruding outward from the connection hole 701;
Breaker having a low noise structure comprising a.
The method of claim 1,
A multi-stage concave groove 230 configured to have an inner diameter smaller as it enters the upper surface side of the piston 200;
A piston absorbing member 240 inserted into the multi-stage concave groove 230;
An end member 250 that covers an upper surface of the piston 200 and is fixed to fix the piston sound absorbing member 240;
Breaker having a low noise structure comprising a.
The method of claim 10,
The piston sound absorbing member 240,
A hollow ring member 241 in which an inner diameter corresponding to the lowermost end of the multi-stage concave groove 230 is fitted into a relatively small groove;
A rigidity supplementing member 243 having an insertion protrusion 242 for insertion into the ring member 241 and seated in the stepped 231 of a groove having a relatively large inner diameter among the multi-stage concave grooves 230;
A sealing member 244 provided on the upper surface of the rigidity supplementing member 243;
Breaker having a low noise structure comprising a.
The method of claim 11,
First and second tapered portions 245 and 246 are respectively tapered in the inward direction from both sides of the sealing member 244 and are axially formed, respectively,
A breaker having a low noise structure comprising a link portion 247 that divides the first and second taper portions 245 and 246 and cross-links the inside of the sealing member 244.
The method of claim 12,
The taper angle of the first tapered part 245 is formed to be relatively smaller than the angle of the second tapered part 246, and the tapered surface length of the first tapered part 245 is the second tapered part 246 ) A breaker having a low noise structure including that formed relatively longer than the length of the tapered surface.

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