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KR101784575B1 - a buffer for railway cars - Google Patents

a buffer for railway cars Download PDF

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Publication number
KR101784575B1
KR101784575B1 KR1020150180632A KR20150180632A KR101784575B1 KR 101784575 B1 KR101784575 B1 KR 101784575B1 KR 1020150180632 A KR1020150180632 A KR 1020150180632A KR 20150180632 A KR20150180632 A KR 20150180632A KR 101784575 B1 KR101784575 B1 KR 101784575B1
Authority
KR
South Korea
Prior art keywords
external force
stepped portion
impact
cushioning material
accommodating space
Prior art date
Application number
KR1020150180632A
Other languages
Korean (ko)
Other versions
KR20170072970A (en
Inventor
김재웅
용석필
Original Assignee
현대로템 주식회사
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.)
Filing date
Publication date
Application filed by 현대로템 주식회사, 주식회사 케이오비에이 filed Critical 현대로템 주식회사
Priority to KR1020150180632A priority Critical patent/KR101784575B1/en
Publication of KR20170072970A publication Critical patent/KR20170072970A/en
Application granted granted Critical
Publication of KR101784575B1 publication Critical patent/KR101784575B1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61GCOUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00Buffers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61FRAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F19/00Wheel guards; Bumpers; Obstruction removers or the like
    • B61F19/04Bumpers or like collision guards
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61GCOUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00Buffers
    • B61G11/12Buffers with fluid springs or shock-absorbers; Combinations thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61GCOUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00Buffers
    • B61G11/18Details

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for a railway vehicle, and more particularly, to a shock absorber for a railway vehicle that absorbs impact energy exceeding an external force (force) In the cushioning material accommodating space, the cushioning material accommodating space is formed at one end of the cushioning material accommodating space. The cushioning material accommodating space has an inner surface step for engagement with a plunger for airtightness, And a first outer stepped portion and a second outer stepped portion for receiving and supporting the moving body and the stopper are formed on the outer surface, and the moving body is engaged with the fixed body, and when the required external force is exceeded, A piston rod that is coupled to an inner center of the impact member and interlocks with a pivoting motion, and an external force that is generated in common in the first external surface stepped portion of the impact member and the fixture, And a support ring for restricting the movement of the collision member, And a stopper including a flange having a plurality of fastening holes formed at an edge portion thereof along a circumference so as to be coupled with a bolt mounted on the railway car structure so as to restrict movement of the member and the support ring and a flange ring for fixing and supporting the flange. do.

Description

A buffer for railway cars}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for a railway vehicle, and more particularly, to a shock absorber for a railway vehicle that absorbs impact energy exceeding an external force (force)

2. Description of the Related Art [0002] Generally, a railway car is operated by a plurality of vehicles connected to each other by a train. For this purpose, a linkage for connecting railway vehicles to each other is formed at the front and rear portions of the railway car, And a shock absorber for absorbing impact energy exceeding an external force required at the time of operation and transmitted through the connector.

However, the conventional shock absorber for a railway vehicle is a plastic deformation type and is configured to absorb impact energy while scraping the inner surface by a scraper mounted on the inner tube as a plastic deformation type, There is a problem in that a buffering operation is performed even with a slight excess external force required at the time of connection work between high-cost parts.

In addition, since the shock absorbing operation is performed even with a slight excess external force, parts such as the outer tube of the shock absorber must be replaced, excessive shock energy can not be stably absorbed and the amount of impact applied to passengers or cargo in the room is increased. There is a possibility that the railway vehicle may be derailed or the passenger may be injured or the cargo may be damaged.

Korean Patent Laid-Open No. 10-2009-0059520

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a railway vehicle, a passenger, and a crew, capable of absorbing impact energy exceeding an external force, And to provide a shock absorber for a railway vehicle which is capable of securing the safety of the railway vehicle and reducing the cost.

According to an aspect of the present invention, there is provided a shock absorber for a railway vehicle comprising a fixed body and a moving body, wherein the fixed body has a cushioning material accommodating space formed therein and a plunger A first outer stepped portion and a second outer stepped portion for receiving and supporting the moving body and the stopper are formed on the outer surface, and the moving body is combined with the fixed body, and when the required outer force is exceeded A piston rod that is coupled to an inner center of the impact member and interlocked with a swinging motion, and an external force generated in common in the first external step portion of the impact member and the fixture, And a support ring for restricting movement of the collision member upon return, the second outer step A flange having a plurality of fastening holes formed at an edge portion thereof along a circumference so as to be coupled with a bolt mounted on the railway car structure so as to limit the movement of the collision member and the support ring and a stopper comprising a flange ring for fixing and supporting the flange, .

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As described above, according to the present invention, it is possible to prevent breakage of components through a fixed body and a movable body which absorb impact energy exceeding an external force required when connecting a connecting device between railway vehicles, and to prevent safety of passengers and crew And the cost is reduced.

In addition, since the impact energy can be stably absorbed by the fixed body and the moving body even when a strong impact is transmitted through the connector, compared with the required external force, the present invention minimizes the impact applied to the passenger or the cargo, It is effective.

The pair of shock absorbers are mutually symmetric, and even if the railway vehicles are strongly impacted by the irregularities formed on one surface of the collision member, they are stably coupled to each other to prevent the occurrence of a marching phenomenon of the railway vehicle, It is possible to prevent the risk of injury or damage to the cargo due to the passenger.

1 is a schematic view illustrating an exploded state of a shock absorber for a railway vehicle according to a preferred embodiment of the present invention.
Fig. 2 is a view showing the coupling state of Fig. 1. Fig.
3 is a cross-sectional view of a main portion of a shock absorber for a railway vehicle according to the present invention.
4 is a view schematically showing a state in which a shock absorber for a railway vehicle according to a preferred embodiment of the present invention is installed in a railway vehicle structure.
5 is a cross-sectional view schematically showing a state before the shock absorber for a railway vehicle of FIG. 4 receives an external force.
FIG. 6 is a schematic view showing a state in which a shock absorber for a railway vehicle according to a preferred embodiment of the present invention is installed in a railway vehicle structure and receives an external force.
FIG. 7 is a cross-sectional view of the shock absorber for a railway vehicle shown in FIG. 6 in a state in which an external force is applied.

Hereinafter, preferred embodiments of the shock absorber for a railway vehicle according to the present invention will be described in more detail with reference to the accompanying drawings.

Hereinafter, the same reference numerals will be used to denote the same or similar elements in all of the following drawings, and repetitive descriptions will be omitted. The following terms are defined in consideration of the functions of the present invention. It should be interpreted as meaning.

As shown in FIGS. 1 to 7, the present invention is roughly divided into a fixed body 110, a moving body 120, and a stopper 130.

A plunger for airtightness is formed at one end of the cushioning material accommodating space 111 and an inner surface step for engaging with a plunger for airtightness is formed at one end of the cushioning material accommodating space 111. [ A first outer step portion 113 for receiving and supporting the moving body 120 and the stopper 130 and a second outer step portion 114 for supporting and supporting the moving body 120 and the stopper 130 are formed on the outer surface, .

Here, the fixing body 110 is formed by combining the moving body 120 and the stopper 130 by the first outer stepped portion 113 and the second outer stepped portion 114, It is possible to restrain the movement and facilitate the fixing of the shock absorber 100 for a railway vehicle.

The first outer surface stepped portion 113 and the second outer surface stepped portion 114 are formed with hooking protrusions 113a and 114a, respectively.

A male screw 114b for engaging with the stopper 130 is formed on one side of the second outer surface stepped portion 114.

The fixing body 110 having the first outer stepped portion 113 and the second outer stepped portion 114 as described above can reduce the number of components and secure the supporting force in both directions.

The fixing body 110 has a first outer surface stepped portion 113 and a second outer surface stepped portion 114 or two stepped portions so that the movable body 120 and the stopper 130 are coupled to each other, 120 can be easily restrained by the collision member 121 and fixed to the railway vehicle structure.

The plunger 115 is formed with a coupling hole 115a at its center to support the movement of the piston rod 122 of the moving body 120, which will be described below.

The cushioning material accommodating space 111 is filled with a cushioning material such as silicone to absorb the energy applied suddenly to absorb impact and is transmitted through the moving body 120. [ It absorbs impact energy due to impact.

That is, when an impact energy exceeding the external force required for connection operation of the railway vehicle connector 210 is generated and is transmitted through the moving body 120, the cushioning material 116 forms a repulsive force (repulsive force) .

Here, the cushioning material 116 is preferably made of silicon forming an oil-like material, but may be formed of hydraulic pressure supplied from a separate hydraulic pump (not shown) if necessary.

The moving body 120 is provided with a collision member 121 which is engaged with the fixing body 110 and receives the impact force by being moved toward one side and directly receives an impact force when an external force (force) And a piston rod 122 which is coupled to the inner center of the impact member 121 and interlocked with the pivoting motion and a first outer surface 122 of the impact member 121 and the fixing member 110, And a support ring 123 which is common to the step portion 113 and restrains the movement of the impact member 121 upon returning while supporting an initially generated external force (force).

The impact member 121 is formed with a male screw 121a at one end thereof for engagement with the support ring 123 and an inner diameter 121b formed at the other end , Respectively.

Here, the outer surface of the impact member 121 may be provided with a recess 121c.

It is preferable that the concave-convex portion 121c is formed so as to intersect with the concave-convex portion 121c of the opposed collision member 121.

That is, when the external force (force) required when connecting the railway vehicle connector 210 is exceeded, the irregularities 121c of the impact member 121 mounted on different railway vehicles are formed to be interdigitated .

For example, it is preferable that the concave portions of the concave-convex portions 121c facing each other are coupled to the convex portions, and the convex portions are formed to be coupled to the concave portions.

Accordingly, even when the railway vehicle collides with each other due to unexpected operation, the irregularities 121c of the opposed collision members 121 are coupled to each other to prevent the railway car from being damaged, thereby causing delamination, Risk can be blocked.

The support ring 123 is formed by a first inner diameter 123a having a large step diameter and a second inner diameter 123b having a small diameter and the first inner diameter 123a is formed by the collision member 121, And a female screw 123c for engaging with the male screw 121a of the impact member 121 is formed and engaged with the male screw 121a of the impact member 121. [

A part of the inner bottom surface located on one side of the second inside diameter 123b is engaged with the engaging protrusion 113a of the first outside step portion 113 of the fixing body 110. [

The moving body 120 having such a configuration is configured such that energy is generated when the speed of the railway vehicle is fast or exceeds the required external force at the time of connecting the connector 210 provided for connection between the railway cars at the front and rear portions of the railway car The impact energy transmitted from the coupler 210 is transmitted to the mobile body 120 when the buffer (not shown) of the connector 210 undergoes a buffering action.

At this time, the moving body 120 slides to the one side through the fixing body 110 due to the impact energy and is blocked by the cushioning material 116 to absorb impact energy and disperse.

That is, the collision member 121 and the support ring 123 are slid through the first outer step portion 113 of the fixture 110, and the piston rod 122 is engaged with the engagement of the plunger 115 The shock energy is absorbed and dissipated while being moved by the cushion material 116 while being moved through the hole 115a.

As a result, it is possible to prevent the parts from being damaged and to secure the safety of the railway vehicle, the passenger and the crew.

The stopper 130 includes a flange 131 coupled through the second outer step portion 114 to restrict movement of the collision member 121 and the support ring 123, And the flange ring 132 is formed.

The flange 131 receives a maximum impact force and a compressive force transmitted through the collision member 121 and the support ring 123 and has a plurality of flanges 131 at the edge portions along the circumference to be fastened to a bolt (not shown) And is formed to restrict the movement of the collision member 121 and the support ring 123. As shown in FIG.

In other words, bolts are inserted into the fastening holes 131a and fastened with nuts to tightly attach to the structure of the railway car, thereby restricting the movement of the collision member 121 and the support ring 123.

The flange 131 having such a configuration is fixed and supported by the second outer surface stepped portion 114 formed on the fixing body 110.

A female screw 132a is formed on one side of the inner surface of the flange ring 132 to engage with the male screw 114b formed on one side of the second outer surface stepped portion 114.

The stopper 130 having such a structure is constrained to prevent the moving body 120 from moving beyond a certain distance.

In the assembly of the cushion 100 for a railway vehicle according to the present invention as described above, the collision member 121 is placed on the floor so that the fixture 110 is raised and positioned in a high state, and the support ring 123 is fixed to the fixture 110, The female screw 123c of the support ring 123 and the male screw 121a of the impact member 121 are screwed together and assembled.

At this time, the piston rod 122 formed on the inner side of the collision member 121 is engaged with the coupling hole 115a formed at the center of the plunger 115.

Next, the flange 131 is held by the second outer surface stepped portion 114 of the fixing body 110 and is supported by the engaging step 114a. Then, the female screw 132a of the flange ring 132 is inserted into the second outer step (114b) formed on the base plate (114).

Thereafter, a fastening means (not shown) such as a bolt is inserted through a fastening hole 131a formed in the flange 131 and fastened to the railway vehicle structure to be firmly mounted.

The present invention having such a configuration can greatly simplify the assembling process, thereby achieving significant improvement in workability and cost reduction.

The fixed body 110 having the first outer surface stepped portion 113 and the second outer surface stepped portion 114 formed on the outer surface thereof is provided with an impact force exceeding the required external force by the piston rod 122 through the impact member 121, The piston rod 1220 and the collision member 121 are advanced so as to return to their original positions when the load is removed from the front surface of the collision member 121. In addition, do.

At this time, the stroke of the collision member 121 is restricted by the first outer step portion 113, the second outer step portion 114, and the support ring 123 formed on the fixing body 110, And completes the function.

The operation state of the present invention having the above-described structure will now be described.

First, when the couplers 210 are coupled to each other while moving at a constant speed for connecting the railway vehicle and the railway vehicle, when the impact strength is such that the buffer (not shown) can buffer the shock absorber 100 Are connected to each other easily without contacting each other.

However, when the railway vehicle moves beyond the speed required for connection of the connector 210 to form an external force, the buffering capacity of the buffer (not shown) is exceeded, .

More specifically, when an impact is transmitted to the buffer (not shown) through the connector 000 by the contact with the railway car, the buffer primarily acts as a buffer.

However, if the impact strength exceeds the buffering capacity of the buffer, the connector 210 is pushed inward.

Next, when the jumping movement of the connector 210 occurs, the railway cars are closer to each other, so that the shock absorber 100 installed on both sides of the front and rear parts of the railway car contact each other to absorb and dissipate the collision energy.

That is, when the shock absorbers 100 for railway cars are in contact with each other, the impact members 121 and the support rings 123 slide backward while sliding through the first outer step portion 113 of the fixture 110, The piston rod 122 is moved through the engagement hole 115a of the plunger 115. [

At this time, the piston rod 122 absorbs and dissipates the impact energy while being blocked by the cushioning force of the cushioning material 116 filled in the cushioning material accommodating space 111 of the fixing body 110.

Accordingly, since the shock absorber 100 for a railway vehicle according to the present invention does not absorb impact energy while scraping the inner surface by a scraper as in the prior art, the parts of the shock absorber 100 are not damaged, have.

When the shock absorbers 100 are mutually opposed to each other, concave and convex portions 121c formed on the outer surface of the impact member 121 are mutually cross-coupled.

That is, the concave portions of the concave-convex portions 121c facing each other are coupled with the convex portions, and the convex portions are coupled with the concave portions.

Accordingly, even when the railway vehicle collides with each other due to unexpected operation, the irregularities 121c of the opposed collision members 121 are coupled with each other to prevent the railroad car from being damaged, thereby preventing derailment, Can be avoided.

When the impact energy exceeding the required external force is transmitted through the connector, the buffer is buffered, and then the shock absorber according to the present invention is further contacted to easily absorb external impact energy.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. And will be apparent to those skilled in the art to which the invention pertains.

100: buffer for railroad cars 110: fixed body
111: cushion material receiving space 112: inner stepped portion
113: first outer surface step portion 114: second outer surface step portion
113a, 114a: engagement jaw 114b: male thread
115: plunger 115a: engaging hole
116: cushion material 120: moving body
121: collision member 121a: male thread
121b: inner diameter 121c:
122: piston rod 123: support ring
123a: first inner diameter 123b: second inner diameter
123c: Female thread 130: Stopper
131: flange 131a: fastening hole
132: flange ring 132a: female thread
210: connector

Claims (4)

A shock absorber for a railway car comprising a fixed body and a moving body,
The cushioning material accommodating space is formed in the fixture body. An inner surface stepped portion for engaging the plunger for airtightness is formed at one end of the cushioning material accommodating space. The outer surface of the fixture body accommodates and supports the moving body and the stopper. 1 external surface step portion and a second external surface step portion are formed,
Wherein the moving body comprises a collision member which is engaged with the fixed body and which receives the impact force when the external force exceeds a required external force and moves to one side and directly receives the impact force, a piston rod coupled to the inner center of the collision member, And a support ring for restricting movement of the collision member when returning while supporting an external force generated in common in the first outer surface stepped portion of the stagnation,
A flange having a plurality of fastening holes formed at an edge portion thereof along a circumference to be coupled with a bolt mounted on the railway car structure so as to limit movement of the impact member and the support ring through the second outer stepped portion, And a stopper made of a ring.
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KR1020150180632A 2015-12-17 2015-12-17 a buffer for railway cars KR101784575B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150180632A KR101784575B1 (en) 2015-12-17 2015-12-17 a buffer for railway cars

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150180632A KR101784575B1 (en) 2015-12-17 2015-12-17 a buffer for railway cars

Publications (2)

Publication Number Publication Date
KR20170072970A KR20170072970A (en) 2017-06-28
KR101784575B1 true KR101784575B1 (en) 2017-10-12

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2730817C1 (en) * 2019-11-14 2020-08-26 Общество с ограниченной ответственностью "ЖД ТРАНС" Automatic towing device of electric train

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200161688Y1 (en) * 1997-02-18 1999-12-01 최종목 Absorber for crane

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200161688Y1 (en) * 1997-02-18 1999-12-01 최종목 Absorber for crane

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