KR20170108314A - Hydraulic buffer with activating module - Google Patents

Hydraulic buffer with activating module Download PDF

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Publication number
KR20170108314A
KR20170108314A KR1020160032011A KR20160032011A KR20170108314A KR 20170108314 A KR20170108314 A KR 20170108314A KR 1020160032011 A KR1020160032011 A KR 1020160032011A KR 20160032011 A KR20160032011 A KR 20160032011A KR 20170108314 A KR20170108314 A KR 20170108314A
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KR
South Korea
Prior art keywords
activating module
accommodating space
external force
hollow tube
accommodation space
Prior art date
Application number
KR1020160032011A
Other languages
Korean (ko)
Other versions
KR101860090B1 (en
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 KR1020160032011A priority Critical patent/KR101860090B1/en
Publication of KR20170108314A publication Critical patent/KR20170108314A/en
Application granted granted Critical
Publication of KR101860090B1 publication Critical patent/KR101860090B1/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
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/103—Devices with one or more members moving linearly to and fro in chambers, any throttling effect being immaterial, i.e. damping by viscous shear effect only
    • 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
    • F16F9/504—Inertia, i.e. acceleration,-sensitive means
    • 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

Abstract

The hydraulic buffer equipped with the activating module of the present invention includes a body having a closed end at one end and an open end formed at the other end, a body accommodated in a first accommodating space at an inner side thereof, a floating piston inserted into the body, A piston rod including a second accommodating space defined by the floating piston and a third accommodating space, and an activating module opening between the first accommodating space and the second accommodating space when an external force is sensed, , The second accommodation space and the third accommodation space are filled with fluid.

Description

[0001] HYDRAULIC BUFFER WITH ACTIVATING MODULE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic buffer, and more particularly, to a hydraulic buffer that performs an action of absorbing shock energy under specific conditions.

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 the case of a specific driving situation such as a sudden start and stop of a train, a shock generated between passenger cars can be applied suddenly and strongly, and such shocks can increase the fatigue of the passenger car connection and 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 shock among the various shock situations described above, but they are a threat to train operation or obstruct the safety of passengers and cargo For example, in order to prepare for the occurrence of an external force greater than or equal to a predetermined impact force, or for attenuating a specified direction and impact.

However, the conventional hydraulic buffer operates on normal and continuously generated vibrations during operation of a normal train, and does not operate due to the design of the external force direction and the magnitude of the external force in the design requiring the operation of the hydraulic buffer, And it is operated in response to repeated impact repeatedly, resulting in lowering durability.

Therefore, there has been a demand for development of a means for controlling the hydraulic buffer to operate only in a situation where the conditions specified by impact force of a specific direction or size or the like are met.

Therefore, a method for solving such problems is required.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide an impact energy absorbing operation under specified conditions to prevent loss of durability of the apparatus due to unnecessary operation, This is to provide a hydraulic buffer that can be controlled by a trigger type.

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.

In order to accomplish the above object, the hydraulic buffer equipped with the activating module according to the present invention includes a body having a closed end at one end and a first accommodating space formed at an inner end thereof as an open tubular body, a body inserted into the body, A piston rod including a floating piston and including a second accommodation space defined by the floating piston and a third accommodation space, and an activating module opening between the first accommodation space and the second accommodation space when an external force is sensed , The first accommodation space, the second accommodation space and the third accommodation space are filled with fluid.

The body has a hollow tube having an open end, one end of which is fixed to the closed end and the other end is connected to the second accommodation space, and a flow path is formed on the inner side and at least one first flow hole penetrates the inside and the outside. .

Alternatively, the activating module may include an external force sensing part formed to protrude out of the closed end, a throttle bar sliding in the longitudinal direction along a flow path formed in the hollow tube according to the operation of the external force sensing part, And includes a valve for opening and closing.

The external force sensing unit is elastically supported by the elastic member.

Alternatively, the throttle bar includes at least a portion of the passage expanding portion formed to have a small diameter so that the passage formed between the hollow tube is expanded.

And, the valve includes at least one second flow hole which is closed in contact with the open end and is opened to be separated from the open end.

Alternatively, the piston rod may include a restoration flow passage connected to the first accommodation space and the second accommodation space at one side of a boundary that defines the first accommodation space and the second accommodation space to allow the fluid to flow.

Then, the third accommodation space is filled with the gas.

According to an aspect of the present invention, there is provided an oil pressure buffer having an activating module for detecting an external force applied to an external force sensing unit for operation so that the external energy sensing unit is configured to absorb impact energy only when the external force sensing unit is activated And the operation of the hydraulic buffer for absorbing the impact energy under the condition of being exposed to various external forces is limited so that the unnecessary operation is eliminated and the durability of the apparatus is prevented from being reduced.

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 module according to a first embodiment of the present invention.
FIG. 2 is a state diagram showing an external force applied to the external force sensing unit of the hydraulic buffer provided with the activating module according to the first embodiment of the present invention.
3 is a state diagram showing a state in which a valve of a hydraulic buffer equipped with an activating module according to the first embodiment of the present invention is opened.
4 is a state diagram illustrating a state in which an external force is removed from the external force sensing unit of the hydraulic buffer provided with the activating module according to the first embodiment of the present invention.
5 is a state diagram showing a state in which the valve of the hydraulic buffer equipped with the activating module according to the first embodiment is closed.
6 is a cross-sectional view of a hydraulic buffer equipped with an activating module according to a second embodiment of the present invention.
7 is a perspective view illustrating a throttle bar and a valve of a hydraulic buffer equipped with an activating module according to a second embodiment of the present invention.
8 is a state diagram showing a state in which a valve of a hydraulic buffer equipped with an activating module according to a second embodiment of the present invention is opened and closed.

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 equipped with the activating module according to the present invention can be implemented as follows.

FIG. 1 is a cross-sectional view of a hydraulic buffer equipped with an activating module according to a first embodiment of the present invention. FIG. 2 is an external force sensing part of a hydraulic buffer equipped with an activating module according to a first embodiment of the present invention. FIG. 3 is a state diagram illustrating a state in which a valve of a hydraulic buffer provided with an activating module according to the first embodiment of the present invention is open; FIG. 4 is a block diagram illustrating a state in which the activating module according to the first embodiment of the present invention FIG. 5 is a state diagram showing a state in which the valve of the hydraulic buffer equipped with the activating module according to the first embodiment of the present invention is closed. FIG. 5 is a state diagram illustrating a state in which the external force is removed from the external force sensing unit.

1 to 5, a hydraulic buffer equipped with an activating module according to an embodiment of the present invention includes an end cover 110 having a closed end formed at one end thereof, A body 100 in which a first accommodation space 10 is formed on the inside of the body 100, a floating piston 400 which is inserted in the body 100 and which is reciprocable in the body and which is partitioned by the floating piston 400, A piston rod 300 including a space 20 and a third accommodation space 30 and an activating module opening between the first accommodation space 10 and the second accommodation space 20 when an external force is sensed And the first accommodation space 10, the second accommodation space 20, and the third accommodation space 30 can be filled with fluid.

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

The body 100 may be provided with an end cover 110 having a space inside and a closed end, and a tubular body with the other end opened.

The body 100 may be embodied as a circular tube, and may have various cross-sectional 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 the inner space of the body 100 such that the piston 100 can reciprocate so that the piston 100 can reciprocate in the inner space of the body 100, So that the piston rod 300 is not detached from the piston rod 300.

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

The hollow tube 120 is coupled to the center of the closed end 110 located in the inner space of the body 100.

At least one first flow hole 122 passing through the inner space and the outer space of the hollow tube 120 is formed and the first flow hole 122 is formed in the hollow tube 120, May be realized in the form of an orifice so that the pressure in the inner space and the outer space of the hollow tube 120 may be formed differently.

The hollow tube 120 is formed with an open end 124 having one end fixed to the closed end 110 and the other end opened toward an open end of the body 100. [

In an embodiment of the present invention, the cross section of the body 100 and the hollow tube 120 may be formed in a concentric circle, and may be connected to a flow path formed inside the hollow tube 120, (110) is opened.

The activating module includes an external force sensing part 200 formed to protrude outward of the end cover 110 and an external force sensing part 200 connected to the external force sensing part 200 to pass through the end cover 110, The throttle bar 210 is slidably coupled in the longitudinal direction and is coupled to one end of the throttle bar 210 to be in contact with or spaced from the open end 124 of the hollow tube 120, And a valve 220 for interrupting the flow of the fluid to the fluid passage 20.

1 and 2, the external force sensing unit 200 is elastically supported by the elastic member 230 and is protruded to the outside of the end cover 110. The elastic member 230 230 to be inserted toward the closed end 110 and to return to the outside of the closed end 110 upon removal of the external force.

The throttle bar 210 is slid along the flow path formed in the inner space of the hollow tube 120 according to the operation of the external force sensing unit 200 and the outer circumference of the throttle bar 210 and the inner circumference of the hollow tube 120 A space through which the fluid can flow is formed.

The valve 220 is connected to the open end 124 of the hollow tube 120 according to the sliding of the throttle bar 210 and to the flow path of the hollow tube 120 connected to the first accommodation space 10, 20 or the flow path of the hollow tube 120 connected to the first accommodation space 10 by being separated from the open end 124 and the second accommodation space 20 are opened.

When the external force is detected by the external force sensing unit 200, the external force sensing unit 200 moves toward the end cover 110 and is supported by the elastic member 230, (210) slides inside the hollow tube (120) and opens and closes the valve (220).

3 to 4, the throttle bar 210 is provided with a flow path extending portion 212 formed at a position adjacent to the valve 220 so as to widen the gap between the inner circumference of the hollow tube 120 .

The passage expanding portion 212 is formed by expanding a space through which the fluid can flow in the passage formed between the hollow tube 120 and the throttle bar 210. By expanding the passage, It is possible to obtain an effect of smooth returning of the valve 220 when the external force is applied to the external force sensing unit 200 by lowering the hydraulic pressure at the adjacent position.

The piston rod 300 is coupled to at least a part of the open end of the body 100 so as to be slidable in the longitudinal direction of the inner space of the body 100.

In order to prevent the piston rod 300 from being detached from the body 100, a protrusion is formed on the outer circumference of the piston rod 200 to contact the end of the body 100 so that the piston rod 300 contacts the body 100 In the present embodiment.

The protrusion may extend outwardly from the outer surface of the piston rod 300 and may be selectively provided outside the body of the rod block 310 or the piston rod 300 to be described later.

The piston rod 300 is formed by closing an end protruding outward of the body 100.

The rod block 310 may be coupled to the end of the piston rod 200 inserted into the inside of the body 100, or may be integrally formed.

1 and 2, the rod block 310 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 closed by the inner side of the piston rod 200 Which is a space formed in the second accommodation space 20.

A hollow tube 120 is connected to the center of the rod block 310 and a position where the hollow tube 120 and the rod block 310 are in contact with each other is provided slidably while maintaining airtightness.

The restoration flow path 312 is formed on the outer side of the rod block 300 which is penetrated by the hollow tube 120 and connects the first accommodation space 10 and the second accommodation space 20, (10) from the second accommodation space (20) to the first accommodation space (10) in accordance with the embodiment in which the present invention is applied and formed as a passage of fluid flow between the first accommodation space (10) and the second accommodation space Or the like.

The floating piston 400 is slid in the longitudinal direction in the inner space of the piston rod 300 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 300 so that the second accommodation space 20 and the third accommodation space 30 defined by the floating piston 400 are respectively charged 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 300, 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 module according to the embodiment of the present invention, The first accommodating space 10, the second accommodating space 20 and the third accommodating space 30 are formed in the space formed by the coupling of the body 100 and the piston rod 300 or the inside thereof, In one embodiment, the fluid is filled to maintain airtightness with the outside.

6 is a sectional view of a hydraulic buffer equipped with an activating module according to a second embodiment of the present invention. FIG. 7 is a perspective view showing a throttle bar and a valve of a hydraulic buffer equipped with the activating module according to the second embodiment of the present invention. And FIG. 8 is a state diagram showing a state in which the valve of the hydraulic buffer equipped with the activating module according to the second embodiment of the present invention is opened or closed.

6 to 8 illustrate a valve 220 according to a second embodiment of the present invention. Referring to FIGS. 6 to 8, the valve 220 is in contact with the inner circumference of the piston rod 300 And at least one or more second flow holes 222 may be formed to penetrate the valve 220 in the longitudinal direction.

The second flow hole 222 is closed so as to be in contact with the open end 124 of the hollow tube 120 and can be opened when the open end 124 and the valve 220 are separated from each other.

In addition, it can be realized as an orifice type hole so that a pressure difference of fluid can be generated at both ends of the valve 220.

Operation of the hydraulic buffer equipped with the activating module according to an embodiment of the present invention will be described based on the above-described configuration.

2, when an external force is sensed by the external force sensing unit 200 protruding outside the end cover 110, which is a closed end, the external force sensing unit 200 moves toward the end cover 110 The stirrer 210 that is dependent on the external force sensing unit 200 is slid inside the hollow tube 120 and the valve 220 is spaced apart from the open end 124 of the hollow tube 120.

The open end 124 of the hollow tube 120 and the valve 220 are spaced apart and fluid flow occurs between the first accommodation space 10 and the second accommodation space 20. [

The hydraulic pressure buffer having the activating module according to an embodiment of the present invention which reacts with the compressive force in the longitudinal direction moves the piston rod 300 to the inside of the body 100 by the external force applied to the external force sensing unit 200, The volume of the first accommodation space 10 is reduced and the fluid filled in the first accommodation space 10 flows into the second accommodation space 20 together with the opening of the valve 220.

The fluid flows into the second accommodation space 20 through the narrow flow path formed by the hollow tube 120 and the throttle bar 210 through the first flow hole 122 and the second accommodation space 20 is filled with the inflow The volume of the fluid becomes larger.

The floating piston 400 is moved by a volume corresponding to the volume of the fluid flowing into the second accommodation space 20, and the third accommodation space 30 is compressed by the corresponding volume.

Therefore, in an embodiment of the present invention, the first accommodation space 10 and the second accommodation space 20 can be filled with a viscoelastic fluid or liquid, and the third accommodation space 30 can be filled with a gas gas is charged.

When the external force applied to the external force sensing unit 200 is removed, the external force sensing unit 200 is returned to the outside of the end cover 110 by the elastic member 230, The flow path in which the first accommodating space 10 and the second accommodating space 20 are connected to each other is closed.

As the external force is removed, the compressed gas in the third accommodation space 30 expands and returns to the neutral state, and the floating piston 400 moves toward the second accommodation space 20 and is compressed.

The fluid in the second accommodation space 20 is returned to the first accommodation space 10 through the restoration flow path 312 and finally the piston rod 300 which has been inserted into the inner space of the body 100 and inserted, And returns to the neutral state.

If an external force equal to or higher than a specific pressure is applied to the external force sensing unit 200 of the activating module, the hydraulic buffer equipped with the activating module according to an embodiment of the present invention operates to absorb impact energy.

On the other hand, when the external force is not applied to the external input that does not satisfy a predetermined pressure or a condition for activation of the activating module, the apparatus is not operated. When the impact applied to the external force sensing unit 200 is removed, The load 300 is gradually returned to the neutral state.

This makes it possible to perform the operation of the hydraulic buffer provided with the activating module according to the embodiment of the present invention only when necessary, and to eliminate the unnecessary operation, thereby increasing durability.

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: closed end
120: hollow tube 122: first flow hole
124: open end
200: external force sensing unit 210: throttle bar
212: flow path expanding section 220: valve
222: second flow hole 230: elastic member
300: Piston rod 310: Rod block
312: restoration euro
400: floating piston

Claims (8)

A body having a closed end at one end and an open tubular body at the other end, the first accommodating space being formed inside;
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; And
And an activating module for opening between the first accommodating space and the second accommodating space when an external force is sensed,
Wherein the first accommodating space, the second accommodating space, and the third accommodating space are provided with an activating module that is filled with a fluid.
The method according to claim 1,
The body
A hollow tube having an open end whose one end is fixed to the closed end and whose other end is connected to the second accommodating space, at least one first flow hole passing through the inside and outside of the hollow tube;
And an activating module including the activating module.
3. The method of claim 2,
Wherein the activating module comprises:
An external force sensing part protruding outside the closed end;
A throttle bar slidable in the longitudinal direction along a flow path formed in the hollow tube according to the operation of the external force sensing unit; And
A valve coupled to the throttle bar to open and close the open end of the hollow tube;
And an activating module including the activating module.
The method of claim 3,
The external force-
A hydraulic buffer comprising an activating module elastically supported by an elastic member.
The method of claim 3,
The throttle bar
At least a part of which is formed to have a small diameter, so that a flow path formed between the hollow tube is expanded;
And an activating module including the activating module.
The method of claim 3,
Wherein the valve comprises:
At least one second flow hole that is closed in contact with the open end and is opened to be spaced apart from the open end;
And an activating module including the activating module.
7. The method according to any one of claims 1 to 6,
The piston rod
A restoration channel provided at one side of a boundary between the first accommodating space and the second accommodating space to connect the first accommodating space and the second accommodating space to allow fluid to flow;
And an activating module including the activating module.
8. The method of claim 7,
And the third accommodating space is equipped with an activating module to which a gas is charged.
KR1020160032011A 2016-03-17 2016-03-17 Hydraulic buffer with activating module KR101860090B1 (en)

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Application Number Priority Date Filing Date Title
KR1020160032011A KR101860090B1 (en) 2016-03-17 2016-03-17 Hydraulic buffer with activating module

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KR20170108314A true KR20170108314A (en) 2017-09-27
KR101860090B1 KR101860090B1 (en) 2018-05-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112298263A (en) * 2019-07-30 2021-02-02 比亚迪股份有限公司 Buffer device, coupler assembly, train and rail transit system
CN112298262A (en) * 2019-07-30 2021-02-02 比亚迪股份有限公司 Buffer device, coupler assembly, train and rail transit system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102392869B (en) * 2011-11-22 2013-05-01 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112298263A (en) * 2019-07-30 2021-02-02 比亚迪股份有限公司 Buffer device, coupler assembly, train and rail transit system
CN112298262A (en) * 2019-07-30 2021-02-02 比亚迪股份有限公司 Buffer device, coupler assembly, train and rail transit system

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