KR101689320B1 - Hydraulic buffer with activating valve - Google Patents

Hydraulic buffer with activating valve Download PDF

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Publication number
KR101689320B1
KR101689320B1 KR1020160032007A KR20160032007A KR101689320B1 KR 101689320 B1 KR101689320 B1 KR 101689320B1 KR 1020160032007 A KR1020160032007 A KR 1020160032007A KR 20160032007 A KR20160032007 A KR 20160032007A KR 101689320 B1 KR101689320 B1 KR 101689320B1
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KR
South Korea
Prior art keywords
valve
accommodation space
space
flow hole
flow
Prior art date
Application number
KR1020160032007A
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Korean (ko)
Inventor
용석필
Original Assignee
주식회사 케이오비에이
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to KR1020160032007A priority Critical patent/KR101689320B1/en
Application granted granted Critical
Publication of KR101689320B1 publication Critical patent/KR101689320B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00—Buffers
    • B61G11/12—Buffers with fluid springs or shock-absorbers; Combinations thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00—Buffers
    • B61G11/18—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The hydraulic pressure buffer provided with the activating valve of the present invention includes a body having a first accommodation space formed therein, a second accommodation space partitioned by the floating piston, the second accommodation space being inserted into the body and having a reciprocating floating piston therein, A piston rod including a housing space, a piston rod coupled to one side of the piston rod to form a boundary between the first housing space and the second housing space, and a first flow hole passing through the first housing space and the second housing space, And a valve unit for opening and closing the block and the first flow hole.

Description

[0001] HYDRAULIC BUFFER WITH ACTIVATING VALVE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hydraulic buffer, and more particularly, to a hydraulic buffer that performs impact energy absorption when a certain impact force or more is inputted.

Generally, a variety of external forces act on a vehicle that is traveling.

In the case of trains traveling with a large number of carriages connected to each other, the force acting on the carriage is relatively generated between the carriage and the carriage. Reactions are continuously exposed to more diverse and irregular impacts.

In addition, in a specific driving situation such as a sudden start and stop of a train, impact generated between carriages can be applied suddenly and strongly, and such shocks can increase the fatigue of the carriage connection to reduce the durability, And even when it prevents the normal running of the train.

In this case, a buffer for absorbing a shock that may be generated between the carriage and the carriage may be provided together with a connector for connecting the carriage to each other, or a side buffer may be provided independently of the connector.

Hydraulic buffers using hydraulic pressure are widely used. These hydraulic buffers are not intended to absorb normal and everyday shocks in the various shock situations described above. However, the hydraulic buffers may be a threat to train operation, In order to prevent the occurrence of an external force greater than a predetermined impact force that can hinder the user.

However, the conventional hydraulic buffer has a disadvantage in that it operates also on the vibration which is normally and continuously generated during normal operation of the train, and the durability is lowered by carrying out the shock absorption. In case of generating a large impact energy to be absorbed by the hydraulic buffer And the shock absorption efficiency which is less than the value was shown.

Therefore, a method for solving such problems is required.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a valve capable of interrupting the flow of fluid filled in a hydraulic buffer, So that the durability and the safety are improved.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a hydraulic pressure buffer having an activating valve. The hydraulic pressure buffer includes a body having a first accommodation space therein, a floating piston inserted in the body and reciprocating within the body, A piston rod including a first accommodating space and a second accommodating space; a piston rod coupled to one side of the piston rod to form a boundary between the first accommodating space and the second accommodating space, And a valve unit for opening and closing the first flow hole.

The body includes a hollow tube having one end fixed to the inside of the body and closed at the other end and having at least one or more second flow holes penetrating the inside and the outside.

Alternatively, the rod block may include a depression formed in a surface of the hollow space corresponding to the cross section of the hollow tube, the first flow hole being formed at the center of the depression.

The valve unit includes a third flow hole accommodated in the depressed portion and coupled to the rod block and having a space formed therein and passing through the outer side and the inner side, And a valve that is received in the inner space of the valve receiver and slidably opens and closes the flow of the fluid.

Alternatively, the load block may include a restoration passage connected to the first accommodation space and the second accommodation space to allow the fluid to move.

The valve is a check valve that opens the fluid flow from the first accommodation space to the second accommodation space and closes the fluid flow from the second accommodation space to the first accommodation space.

Alternatively, the valve may include a guide portion that has an outer periphery in contact with the inner surface of the valve receptacle and slides in the longitudinal direction, a connecting portion and a connecting portion extending in the longitudinal direction on one side of the guide portion and spaced from the inner surface of the valve receiving portion, And an opening / closing part for opening / closing the flow of the fluid in contact with the inner surface.

The first accommodation space, the second accommodation space and the third accommodation space are filled with fluid.

According to an aspect of the present invention, there is provided a hydraulic pressure buffer having an activating valve, the shock absorber not performing impact energy unless an impact force of at least a predetermined level is applied thereto, Because it only works in a timely manner, it reduces the fatigue of the hydraulic buffer and improves durability.

In addition, a valve that is opened and closed by hydraulic pressure in the inner space is intermittently opened, and is configured to automatically return to a neutral state in a standby state capable of absorbing impact energy, so that impact energy absorption can be repeatedly performed Effect can be obtained.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a cross-sectional view of a hydraulic buffer equipped with an activating valve according to an embodiment of the present invention.
2 is a simplified cross-sectional view illustrating an inner space of a hydraulic buffer provided with an activating valve according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a load block of a hydraulic buffer having an activating valve according to an embodiment of the present invention.
FIG. 4 is a state diagram illustrating a state in which a valve of an oil pressure buffer equipped with an activating valve is operated according to an embodiment of the present invention.
5 is a front view and a side view showing a sectional shape of a valve and a valve opening / closing part of a hydraulic buffer provided with an activating valve according to an embodiment of the present invention.
6 is an operational state diagram illustrating a state in which a hydraulic buffer equipped with an activating valve is operated by an external force according to an embodiment of the present invention.
7 is an operational state diagram illustrating a process of restoring a neutral state by removing an external force from a hydraulic buffer provided with an activating valve according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

The hydraulic buffer provided with the activating valve according to the present invention can be implemented as follows.

FIG. 1 is a cross-sectional view of a hydraulic buffer provided with an activating valve according to an embodiment of the present invention, FIG. 2 is a simplified cross-sectional view illustrating an inner space of a hydraulic buffer having an activating valve according to an embodiment of the present invention, 3 is a cross-sectional view illustrating a load block of a hydraulic buffer provided with an activating valve according to an embodiment of the present invention, and FIG. 4 is a view illustrating a state in which a valve of a hydraulic buffer equipped with an activating valve according to an embodiment of the present invention is operated 5 is a front view and a side view showing a cross-sectional shape of a valve and a valve opening / closing part of a hydraulic buffer provided with an activating valve according to an embodiment of the present invention.

1 to 5, a hydraulic buffer having an activating valve according to an embodiment of the present invention is roughly divided into a body 100 having a first accommodation space 10 therein, a piston rod 200, a load block 220, and a valve unit 300.

The piston rod 200 is at least partially inserted into the inside of the body 100 and has a floating piston 400 that is reciprocatable in the longitudinal direction.

The inner space of the piston rod 200 is partitioned into the second accommodation space 20 and the third accommodation space 30 by the floating piston 400.

The rod block 220 is coupled to one side of the piston rod 200 inserted to the inside of the body 100 to form a boundary between the first accommodation space 10 and the second accommodation space 20, A first flow hole 314 is formed at the central portion to connect the first accommodation space 10 and the second accommodation space 20.

The valve unit 300 is provided to open and close the first flow hole 314.

Each of the above-described configurations will be described in detail below.

The body 100 may have a tubular body having an end cover 110 having an inner space and a closed end.

And may be implemented in various shapes such as a rectangular tube or a polygon according to an embodiment to which the present invention is applied.

The piston 100 is inserted into and coupled with the inner space of the body 100 to reciprocate the inner space of the body 100. The piston 100 is inserted into the inner space of the body 100, The piston rod 200 is restrained.

The end cover 110 of the body 100 may be integrally formed with the body 100 and may be hermetically coupled to the body 100 in various manners as shown in FIG.

A hollow tube 130 is coupled to the center of the end cover 110 located in the inner space of the body 100.

At least one second flow hole 132 passing through the inner space and the outer space of the hollow tube 130 and at least one second flow hole 132 is formed in the hollow tube 130, May be realized in the form of an orifice so that the inner and outer pressures of the hollow tube 130 may be formed differently.

One end of the hollow tube 130 is fixed to the end cover 110 and the other end is opened toward the open end of the body 100.

In an embodiment of the present invention, the cross section of the body 100 and the hollow tube 130 may be implemented in a concentric circle.

The piston rod 200 is at least partially engaged with the open end of the body 100 and is coupled to be slidable in the longitudinal direction of the inner space of the body 100.

In order to prevent the piston rod 200 from being separated from the body 100, a protrusion 226 is formed on the outer circumference of the piston rod 200, and the piston rod 200 is in contact with the step portion of the body 100, So that it can not be separated from the body 100.

The protrusion 226 extends outwardly from the outer surface of the piston rod 200 and may be selectively provided outside the body of the rod block 220 or the piston rod 200 to be described later.

The piston rod 200 may be formed at the end protruding outward of the body 100, as shown in FIG.

The rod cover 210 is provided so that an external force such as an impact from the outside can be transmitted in various ways according to an embodiment in which the external force is directly applied or the present invention is applied.

The rod block 220 is formed at the end of the piston rod 200 inserted into the body 100 as shown in FIG.

The rod block 220 may be integrally formed with the piston rod 200 and may be coupled to the piston rod 200 in various manners according to an embodiment to which the present invention is applied.

2, the rod block 220 includes a first accommodation space 10 which is sealed by the piston rod 200 as an inner space of the body 100 and a second accommodation space 10 which is formed inside the piston rod 200 Thereby forming a boundary of the second accommodation space 20 which is a space.

A depression may be formed in the center of the surface of the rod block 220 contacting the first accommodation space 10 and recessed in a shape corresponding to the end surface of the hollow tube 130.

The depression is formed such that the hollow tube 130 is slid to the inside and the piston rod 200 is slid to the inside of the body 100 due to external force, Is inserted into the depression.

A first flow hole (314) connecting the first accommodation space (10) and the second accommodation space (20) is formed through the center of the depression.

In one embodiment of the present invention, a bushing 222 may be provided on the inner periphery of the depression as shown in FIG.

The bushing 222 attenuates friction and provides a sealing force when the open end of the hollow tube 130 enters the depression.

The restoration flow path 224 is formed on the outer side of the depression formed in the rod block 200 and connects the first accommodation space 10 and the second accommodation space 20. The restoration flow path 224 connects the first accommodation space 10 and the second accommodation space 20, 2 accommodating space 20 and adapted to permit only fluid flow in one direction from the second accommodating space 20 to the first accommodating space 10 according to an embodiment to which the present invention is applied, To permit flow.

When the fluid is allowed to flow through the restoration passage 224 only in one direction from the second accommodation space 20 to the first accommodation space 10, The operation of the buffer does not operate at all under the set pressure and the flow of the fluid through the recovery channel 224 acts to return the piston rod 200 inserted to the inside of the body 100 to the neutral state.

The protrusion 226 may be selectively formed on the outer surface of the piston rod 200 or on the outer circumference of the rod block 220 and may be interfered with the step portion of the body 100, So that the piston rod 200 does not come off.

The valve unit 300 includes a valve receiver 310 and a valve 320 for opening and closing the first flow hole 314 formed in the rod block 220.

The valve receptacle 310 is coupled adjacent to the first flow hole 314 inside the depression of the load block 220 as shown in FIG.

The valve receptacle 310 forms a space between the first accommodation space 10 and the first flow hole 314 and the third flow hole 312 passing through the space and the first accommodation space 10, And the third flow hole 312 may be formed in the form of an orifice so that the fluid pressure between the inner space of the valve receiver 310 and the first accommodation space 10 is formed differently.

The valve 320 is provided inside the valve receptacle 310 and includes a guide portion 322, a connecting portion 324 and an opening / closing portion 326 as shown in Figs.

The guide portion 322 is formed so that the outer periphery thereof contacts the inner surface of the valve receiver 310 and slides in the longitudinal direction in the inner space of the valve receiver 310.

The opening and closing part 326 is formed so as to increase its outer circumference from one end to the other end so as to be able to close the flow path by contacting a part of the inner surface of the valve receptacle 310 provided corresponding thereto.

As shown in FIG. 5, the opening / closing portion has a concave portion 328 formed concavely in the center direction to serve as a flow path when the valve 320 is opened.

In an embodiment of the present invention, as shown in FIGS. 1 and 4, the inner surface of the valve receiver 310 is formed so as to gradually increase its diameter at a portion adjacent to the first flow hole 314, 320 may be formed in a conical shape having a gradually increasing diameter in a shape corresponding to the inner surface of the valve receiver 310 described above.

Which are illustrative and may be embodied in various shapes of valves 320 according to embodiments to which the present invention is applied.

The connection portion 324 connects the guide portion 322 and the opening and closing portion 318 and is formed to have a diameter smaller than that of the guide portion 322 so as to be spaced from the inner surface of the valve receiver 310.

The diameter of the connection portion 324 is formed to be smaller than that of the guide portion 322 so that the flow of the third flow hole 312 is maintained in the inner space of the valve receiver 310 provided in the valve receiver 310 .

4, a guide portion 322 is slid in an inner space of the valve receiver 310, and a region 316 is formed by the volume of the guide portion 322, The opening and closing part 326 may be provided to provide an elastic force to the guide part 322 so as to be in contact with the inner surface of the valve receiving part 310. [

5, one surface of the opening / closing portion 326 is formed so that the pressure applied by the fluid filled in the second accommodation space 20 acts perpendicular to the surface and the other surface acts on the valve receptacle 310 The pressure due to the fluid applied to the inner side of the valve body 1 is inclined.

This is because the pressure applied to the opening / closing part 326 is different on both sides, and the opening / closing part 326, which is opened and closed through the flow of the fluid, has the effect of eliminating the external force and speeding up the return to the neutral state have.

The floating piston 400 is slid in the longitudinal direction in the inner space of the piston rod 200 and is provided so as to reciprocate.

The floating piston 400 is formed so as to keep the airtightness with the inner surface of the piston rod 200 and is filled in the second accommodation space 20 and the third accommodation space 30 defined by the floating piston 400, So that the fluids do not mix or flow with each other.

Accordingly, as the floating piston 400 reciprocates in the inner space of the piston rod 200, the second accommodation space 20 and the third accommodation space 30 are compressed or expanded, respectively.

The first accommodation space 10, the second accommodation space 20 and the third accommodation space 30 are formed by the configurations of the hydraulic pressure buffer provided with the activating valve according to the embodiment of the present invention, The first accommodation space 10, the second accommodation space 20 and the third accommodation space 30 are formed in the space formed by the coupling of the body 100 and the piston rod 200 or in the inside thereof. In the embodiment, the fluid is filled and the airtightness with the outside can be maintained.

The operation of the hydraulic buffer provided with the activating valve according to an embodiment of the present invention will be described based on the above-described configuration.

FIG. 6 is an operational state view showing a state in which a hydraulic buffer equipped with an activating valve is operated by an external force according to an embodiment of the present invention, and FIG. 7 is a flowchart illustrating an operation of the hydraulic buffer having an activating valve according to an embodiment of the present invention. FIG. 3 is an operational state diagram illustrating a process of removing an external force and restoring the neutral state. FIG.

6, the hydraulic buffer provided with the activating valve according to an embodiment of the present invention includes an end cover 110 of the body 100, a rod cover (not shown) formed in a direction opposite to the end cover 110 210 for reducing the external force exerted on both sides.

The piston rod 200 is pushed into the inner space of the body 100 when an external force such as shock or vibration is applied from both sides through the end cover 110 and the rod cover 210, The volume of the first accommodation space 10 is reduced and the fluid filled in the first accommodation space 10 flows into the hollow tube 130 through the second flow hole 132 corresponding to the reduced volume.

The valve receiver 310 is inserted into the hollow tube 130 depending on the sliding of the piston rod 200 and a narrow flow path is formed between the inner surface of the hollow tube 130 and the valve receiver 310.

The fluid filled in the first accommodation space 10 flows through the narrow flow path formed between the inner surface of the hollow tube 130 and the valve receptacle 310 and flows through the third flow hole 312, And the valve 320 is opened by pushing the opening / closing part 326 of the valve 320. [

The fluid in the first accommodation space 10 flows into the second accommodation space 20 through the first flow hole 314 as the valve 320 is opened and the fluid flowing into the second accommodation space 20 The floating piston 400 slides in the direction of the rod cover 210 from the inside of the piston rod 200. [

Accordingly, the volume of the third accommodation space 30 is reduced and the volume of the third accommodation space 30 is expanded or contracted. In an embodiment of the present invention, in the third accommodation space 30, ). ≪ / RTI >

When the external force is removed, the gas compressed in the third accommodation space 30 expands and the floating piston 400 returns to its original position do.

The volume of the second accommodation space 20 is reduced by the return of the floating piston 400 and the fluid that has flowed into the second accommodation space 20 is returned to the first accommodation space 10 through the opening / And the opening / closing part 326 comes into contact with the inner surface of the valve receiver 310 by the pressing force, thereby closing the flow path.

The fluid in the second accommodation space 20 is returned to the first accommodation space 10 through the restoration flow path 224 and the fluid is returned only by the restoration flow path 224 by closing the valve 320, It is possible to obtain an effect that the operation of returning the hydraulic buffer having the activating valve according to the embodiment to the neutral state is not caused abruptly and smooth operation is performed without shock or vibration.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

10: first accommodation space 20: second accommodation space
30: Third accommodation space
100: Body 110: End cover
130: hollow tube 132: second flow hole
200: Piston rod 210: Rod cover
220: Roadblock 222: Bushing
224: Restoration flow path 226:
300: valve unit 310: valve receiver
312: third flow hole 314: first flow hole
318: elastic body 320: valve
322: guide portion 324:
326: opening and closing part 328:
400: floating piston

Claims (8)

A first receiving space formed in the one end of the tubular body and the other end of the tubular body, the first receiving space being fixed to the center of the closed end, the one end being closed and the other end being open, A body including a hollow tube having a second flow hole;
A piston rod inserted into the body and having a reciprocating floating piston therein and including a second accommodating space defined by the floating piston and a third accommodating space;
A recess formed at a center of a surface of the piston rod which is in contact with the first accommodating space and corresponding to an end surface of the hollow tube, And a first flow hole passing through the first accommodation space and the second accommodation space is formed at the center of the depression; And
At least a part of which is accommodated in the hollow tube and can reciprocate, is spaced apart from the inner side surface of the hollow tube so as to form a flow path, the other side is accommodated in the depression and is coupled to the rod block, And a valve unit including a valve for receiving and sliding the first flow hole and opening and closing the first flow hole,
Wherein the first accommodating space and the second accommodating space are filled with liquid, the third accommodating space is filled with gas, and when the piston rod is inserted into the body, the valve is opened to open the first accommodating space An activated valve is provided in which the charged liquid sequentially flows through the second flow hole, the third flow hole and the first flow hole to flow into the second accommodation space and the floating piston compresses the third accommodation space Hydraulic buffer.
delete delete delete The method according to claim 1,
The road block includes:
A restorative channel connected to the first accommodating space and the second accommodating space to allow the fluid to move;
And an activating valve.
The method according to claim 1,
Wherein the valve comprises:
And an activating valve that is a check valve that opens a fluid flow from the first accommodation space to the second accommodation space and closes fluid flow from the second accommodation space to the first accommodation space.
The method according to claim 1,
Wherein the valve comprises:
A guide portion whose outer periphery is in contact with the inner surface of the valve receiver and sliding in the longitudinal direction;
A connecting portion extending in the longitudinal direction on one surface of the guide portion and spaced apart from the inner surface of the valve receiver; And
An opening / closing part coupled to the connection part and contacting an inner surface of the valve receiver to open / close a flow of the fluid;
And an activating valve.

delete
KR1020160032007A 2016-03-17 2016-03-17 Hydraulic buffer with activating valve KR101689320B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180078488A (en) * 2016-12-30 2018-07-10 주식회사 케이오비에이 Hydraulic buffer with activating valve
KR20180078485A (en) * 2016-12-30 2018-07-10 주식회사 케이오비에이 Hydraulic buffer with multi-flowpath

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102392869A (en) * 2011-11-22 2012-03-28 广东机电职业技术学院 Entity valve type shock absorber with dual intercommunicating gas chambers
KR20130011468A (en) * 2011-07-21 2013-01-30 주식회사 만도 Valve structure of a shock absorber
CN203623705U (en) * 2013-12-11 2014-06-04 南车二七车辆有限公司 Split type hydro-pneumatic buffer for railway vehicle
CN204113991U (en) * 2014-07-30 2015-01-21 北京金自天和缓冲技术有限公司 Liquid and gas damper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130011468A (en) * 2011-07-21 2013-01-30 주식회사 만도 Valve structure of a shock absorber
CN102392869A (en) * 2011-11-22 2012-03-28 广东机电职业技术学院 Entity valve type shock absorber with dual intercommunicating gas chambers
CN203623705U (en) * 2013-12-11 2014-06-04 南车二七车辆有限公司 Split type hydro-pneumatic buffer for railway vehicle
CN204113991U (en) * 2014-07-30 2015-01-21 北京金自天和缓冲技术有限公司 Liquid and gas damper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180078488A (en) * 2016-12-30 2018-07-10 주식회사 케이오비에이 Hydraulic buffer with activating valve
KR20180078485A (en) * 2016-12-30 2018-07-10 주식회사 케이오비에이 Hydraulic buffer with multi-flowpath
KR101941602B1 (en) 2016-12-30 2019-01-24 주식회사 케이오비에이 Hydraulic buffer with activating valve
KR101941598B1 (en) 2016-12-30 2019-04-11 주식회사 케이오비에이 Hydraulic buffer with multi-flowpath

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