CN207466571U - Buffering anti-collision device - Google Patents
Buffering anti-collision device Download PDFInfo
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- CN207466571U CN207466571U CN201721440869.3U CN201721440869U CN207466571U CN 207466571 U CN207466571 U CN 207466571U CN 201721440869 U CN201721440869 U CN 201721440869U CN 207466571 U CN207466571 U CN 207466571U
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- collision device
- power
- buffering anti
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Abstract
The utility model provides a kind of buffering anti-collision device, two energy absorbers including the Crashworthy plate with storage tank and the same side for being symmetrically connected to Crashworthy plate, energy absorber includes lead, be placed in storage tank and with the buffer element of lead pivot bush unit, pivot bush unit is used to connect by the mounting flange of protection body in the power-absorbing on lead and pivot bush unit on lead；One end of buffer element, power-absorbing and mounting flange self- steering column is detachably connected successively to the other end of lead.The utility model employs buffer element, power-absorbing and mounting flange and is detachably connected successively, and the buffering and energy-absorbing task of different collision energy grades are completed by buffer element and power-absorbing, after collision accident, only needing will be by the element replacement of conquassation deformation, so as to solve the technical issues of buffering anti-collision device of monoblock type needs integral replacing, can not meet the buffering of different collision energy grades and energy-absorbing task when contingency occurs.
Description
Technical field
The utility model belongs to energy absorption device technical field, is to be related to a kind of buffering anti-collision device more specifically.
Background technology
At present, would generally pacify at the position that automobile, rail traffic vehicles, high-rise building elevator etc. easily collide
Passive security protective device is filled, wherein, more the most commonly used is buffering anti-collision device, operation principle is by honeycomb plasticity
Deform energy-absorbing.But because the severity of burst accident is different, when bearing the not shock loading of syn-collision grade, cushion bumper
The deflection of device can also have any different, especially for the vehicle that tramcar etc. is run on open road, both existed with
The situation of the collisions such as bicycle, there is also the possibility with the heavy barrier collision such as load truck, collision energy has significance difference
Not.
However, existing buffering anti-collision device generally use monolithic construction, to ensure to fully absorb according in terms of design
Obtained ceiling capacity, in this way in slight contingency, it may appear that only plasticity change occurs buffering anti-collision device for fraction
Shape, but there is still a need for the situations of integral replacing for security consideration, it is impossible to meet the buffering and energy-absorbing of different collision energy grades
Task, and since the energy absorption device of monoblock type manufactures difficult, lead to that cost is higher, deficiency in economic performance.
Utility model content
The purpose of this utility model is to provide a kind of buffering anti-collision devices, and to solve in the prior art, monoblock type is delayed
Rush anticollision device, collision-prevention device needs integral replacing when contingency occurs, and the buffering and energy-absorbing that can not meet different collision energy grades are appointed
The technical issues of business.
To achieve these goals, the technical solution adopted in the utility model is：A kind of buffering anti-collision device is provided, is wrapped
It includes the Crashworthy plate with storage tank and is symmetrically connected to two energy absorbers of the same side of the Crashworthy plate, the energy absorber packet
Include the lead of one end and the Crashworthy plate rotation connection, be placed in the storage tank and with the lead pivot bush unit
Buffer element, pivot bush unit are used to connect in the power-absorbing on the lead and pivot bush unit on the lead
It connects by the mounting flange of protection body；The buffer element, the power-absorbing and the mounting flange are from the one of the lead
It holds to the other end of the lead and is detachably connected successively.
Further, the energy absorber further includes the interval that is located in the buffer element and the power-absorbing
Guide plate, the guide plate and the lead pivot bush unit and can stretch into the storage tank.
Further, limiting slot is offered on the end face of the guide plate, projection on the other end of the guide plate
There is defining flange, the side of the buffer element, which is stretched into, forms limiting in the limiting slot, the defining flange stretches into the suction
Limiting can be formed in gap between element and the lead.
Further, the bearing strength of the buffer element is less than the bearing strength of the power-absorbing.
Further, the buffer element is rubber parts or polyurethane part.
Further, the power-absorbing is honeycomb structure part.
Further, covered with metal skin on the periphery wall of the power-absorbing.
Further, it is provided on the lateral surface of the Crashworthy plate from one end of the Crashworthy plate towards the another of the Crashworthy plate
Multiple anti-climbing teeth of one end extension.
Further, the buffering anti-collision device further include one end for being removably connected to the lead for connecting
The fixing piece of vehicle end carriage, the pulling offered in the middle part of the Crashworthy plate positioned at the interval of the adjacent two anti-climbing teeth connect
Mouthful, the pulling interface is connected with the storage tank.
Further, the Crashworthy plate is provided at both ends with reinforcing rib.
The advantageous effect of buffering anti-collision device provided by the utility model is：Due to buffer element, power-absorbing and consolidate
The one end for determining flange self- steering column is detachably connected, and pass through buffer element and power-absorbing successively to the other end of lead
Complete the buffering of different collision energy grades and energy-absorbing task so that the endergonic process of buffering anti-collision device is more steady, is touching
It hits in the maintenance process after accident, it is thus only necessary to the element replacement by conquassation deformation be fallen, prevented without that will buffer
Collision device integral replacing needs entirety more so as to efficiently solve the buffering anti-collision device of monoblock type when contingency occurs
The technical issues of changing, can not meeting the buffering of different collision energy grades and energy-absorbing task improves the suitable of buffering anti-collision device
With property, the maintenance efficiency of buffering anti-collision device is improved, saves the maintenance cost of buffering anti-collision device.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing is briefly described needed in description, it should be apparent that, the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the stereoscopic schematic diagram of buffering anti-collision device that the utility model embodiment provides；
Fig. 2 is the decomposition diagram of buffering anti-collision device that the utility model embodiment provides；
Fig. 3 is the stereoscopic schematic diagram of energy absorber in the buffering anti-collision device that the utility model embodiment provides；
Fig. 4 is the stereoscopic schematic diagram of corrugated plate that the utility model embodiment provides；
Fig. 5 is the stereoscopic schematic diagram of Crashworthy plate in the buffering anti-collision device that the utility model embodiment provides；
Fig. 6 is the decomposition diagram of buffering anti-collision device use state that the utility model embodiment provides.
Wherein, each reference numeral in figure：
1-buffering anti-collision device, 2-vehicle end carriage, 10-Crashworthy plate, 20-energy absorber, 30-fixing piece, 11-company
Fitting, the 12-the first mounting hole, 13-anti-climbing tooth, 14-pulling interface, 15-third mounting hole, 16-reinforcing rib, 21-are led
Xiang Zhu, 22-buffer element, 23-power-absorbing, 24-mounting flange, 25-guide plate, 100-storage tank, 140-the second
Via, 211-escape groove, the 212-the second mounting hole, the 213-the four mounting hole, 231-corrugated plate, 232-metal skin,
251-limiting slot, 252-defining flange.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and advantageous effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention is further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be directly another
On one element or it is connected on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", " on ", " under ", "front", "rear", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " top ", " bottom " " interior ", " outer " are to be closed based on orientation shown in the drawings or position
System is for only for ease of description the utility model and simplifies description rather than instruction or imply that signified device or element are necessary
With specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature." multiple " are meant that two or two in the description of the present invention,
More than, unless otherwise specifically defined.
It please refers to Fig.1 to Fig.3, now buffering anti-collision device provided by the utility model is illustrated.The cushion bumper fills
It puts 1 and includes Crashworthy plate 10 and two groups of energy absorbers 20, wherein, storage tank 100, two groups of energy absorbers are offered on Crashworthy plate 10
20 are symmetrically connected to the same side of Crashworthy plate 10, and specifically, energy absorber 20 is connected to the inside of Crashworthy plate 10, including being oriented to
Column 21, buffer element 22, power-absorbing 23 and mounting flange 24, herein, buffer element 22 is accommodated in storage tank 100, and
And with 21 pivot bush unit of lead, power-absorbing 23 is actively socketed on lead 21, and mounting flange 24 is actively socketed on guiding
On column 21, and for connecting by protection body, this refers to automobile, rail traffic vehicles and elevator etc. by protection body；Cushioning element
One end of 24 self- steering column 21 of part 22, power-absorbing 23 and mounting flange is detachably connected successively to the other end of lead 21.
Under working condition, above-mentioned lead 21 can sequentially pass through buffer element 22, power-absorbing 23 in edge under external force
It is reciprocating with the interface channel (not marking) of mounting flange 24.When colliding, Crashworthy plate 10 is first in contact, buffering
Anticollision device, collision-prevention device 1 directly bears impact load by Crashworthy plate 10, and then lead 21 is under external force towards far from Crashworthy plate 10
Direction movement, since mounting flange 24 is fixedly connected with by protection body, Crashworthy plate 10 and mounting flange 24 are by buffer element 22
It is compressed with power-absorbing 23, collision energy is converted into the strain energy of distortion of buffer element 22 and power-absorbing 23, is touched so as to absorb
Energy is hit, wherein, buffer element 22 and power-absorbing 23 can be respectively completed the buffering of different collision energy grades and energy-absorbing task.
Since the other end of one end to the lead 21 of 24 self- steering column 21 of buffer element 22, power-absorbing 23 and mounting flange successively may be used
Dismantling connection, therefore, in the maintenance process after collision accident, it is thus only necessary to fall the element replacement by conquassation deformation
, entire buffering anti-collision device 1 can reuse, without by 1 integral replacing of buffering anti-collision device, both improving maintenance effect
Rate, and save maintenance cost.
It is appreciated that：Buffering anti-collision device 1 can be applicable on the rail traffic vehicles for being equipped with special anti-creep device,
It can also apply in the equipment for not needing to anti-creep in elevator etc..
Buffering anti-collision device 1 provided by the utility model, compared with prior art, advantageous effect is：Due to cushioning element
One end of 24 self- steering column 21 of part 22, power-absorbing 23 and mounting flange is detachably connected successively to the other end of lead 21,
And the buffering of different collision energy grades and energy-absorbing task are completed by buffer element 22 and power-absorbing 23 so that buffering is anti-
The endergonic process of collision device 1 is more steady, in the maintenance process after collision accident, it is thus only necessary to will be deformed by conquassation
Element replacement fall, without by 1 integral replacing of buffering anti-collision device, so as to efficiently solve the cushion bumper of monoblock type
Device needs integral replacing when contingency occurs, and can not meet the buffering of different collision energy grades and the skill of energy-absorbing task
Art problem improves the applicability of buffering anti-collision device, improves the maintenance efficiency of buffering anti-collision device, saves cushion bumper
The maintenance cost of device.
Further, Fig. 2 and Fig. 3 are please referred to, a kind of specific reality as buffering anti-collision device provided by the utility model
Mode is applied, above-mentioned energy absorber 20 further includes guide plate 25, which is folded in buffer element 22 and power-absorbing 23
Interval, meanwhile, guide plate 25 and 21 pivot bush unit of lead, and guide plate 25 can be stretched into storage tank 100.Specifically,
Guide plate 25 can be formed by aluminium section bar through over mechanical processing, the phase that buffer element 22 and power-absorbing 23 can respectively with guide plate 25
Both ends of the surface by gluing are fastenedly connected, for interval buffer element 22 and power-absorbing 23, avoid what buffer element 22 was born
Shock loading is directly passed to power-absorbing 23, and power-absorbing 23 is caused to deform together with buffer element 22, reduces suction
The maintenance cost of energy mechanism 20.Certainly, as the case may be and demand, in the other embodiments of the utility model, guide plate
25 can also be that the materials such as iron or nylon fiber are process, and not limit uniquely herein.
Further, Fig. 2 and Fig. 3 are please referred to, a kind of specific reality as buffering anti-collision device provided by the utility model
Mode is applied, limiting slot 251 is offered on the end face of above-mentioned guide plate 25, limit is convexly equipped on the other end of guide plate 25
Position flange 252, wherein, the side of above-mentioned buffer element 22, which is stretched into, forms limiting in limiting slot 251, defining flange 252 stretches into
It states and limiting is formed in the gap between power-absorbing 23 and lead 21.Specifically, the notch internal diameter and cushioning element of limiting slot 251
The outer diameter of part 22 is equal, and the internal diameter of defining flange 252 is greater than or equal to the outer diameter of lead 21, and defining flange 252 is outer
Diameter is equal with the internal diameter of power-absorbing 23.During work, limiting slot 250 can constrain the deformation of buffer element 22, prevent buffer element
Radial deformation along buffer element 22, guide plate 25, defining flange 252 occur under the impact of bump stroke for 22 outer section
Power-absorbing 23 is matched for clamping tightly with mounting flange 24, and then improves the stability and reliability of endergonic process.
Further, as a kind of specific embodiment of buffering anti-collision device provided by the utility model, above-mentioned buffering
The bearing strength of element 22 is less than the bearing strength of power-absorbing 23, so as to reduce the peak load of energy-absorbing starting stage.Work as hair
During raw collision, the buffer element 22 positioned at 23 front end of power-absorbing will deform first, when collision energy smaller grade, inhale
Energy element 23 may not deform, only after buffer element 22 reaches setting extreme limit of travel or mechanical index, energy-absorbing member
Part 23 just starts to act, and then when replacing energy-absorbing component 22, can only replace buffer element 22, therefore can greatly reduce repair
Time and cost.
Preferably as a kind of specific embodiment of buffering anti-collision device provided by the utility model, above-mentioned cushioning element
Part 22 is rubber parts or polyurethane part.Specifically, buffer element 22 is light-weight high-polymer compound synthesis, in this way, buffer element
22 have the cushion performance of large capacity, and when collision energy smaller grade, buffer element 22 can be self-healing original state.Certainly, root
According to concrete condition and demand, in the other embodiments of the utility model, buffer element 22 can also be spring, disc spring etc., herein
It does not limit uniquely.
Preferably, referring to Fig. 4, a kind of specific embodiment as buffering anti-collision device provided by the utility model,
Above-mentioned power-absorbing 23 winds the honeycomb structure part formed for corrugated plate 231.Specifically, power-absorbing 23 is corrugated plate 231
It winds, wherein, the ripple of corrugated plate 231 is evenly spaced on corrugated plate 231, and corrugated plate 231 can pass through rolling or punching press
Mode is process, and the load-carrying properties of power-absorbing 23 are adjusted by adjusting the dimensional parameters of ripple, when collision energy grade
When larger, power-absorbing 23 absorbs the energy of collision by the compressive deformation of itself.Preferably, the ripple of corrugated plate 231 can be
Trapezoidal or triangle, certainly, as the case may be and demand, in the other embodiments of the utility model, the wave of corrugated plate 231
Line can be also the shapes such as semicircle, not limit uniquely herein.
Further, referring to Fig. 2, a kind of specific embodiment party as buffering anti-collision device provided by the utility model
Formula, covered with metal skin 232 on the periphery wall of above-mentioned power-absorbing 23, i.e., the bee wound by above-mentioned corrugated plate 231
Nest structural member is filled in metal skin 232, and when collision energy grade is larger, metal skin 232 can convert collision energy
For flow of metal energy, the honeycomb cellular structure member is coordinated to absorb collision energy, and then improve the energy absorbing efficiency of power-absorbing 23；And
Metal skin 232 is wrapped in the periphery of the honeycomb cellular structure member, and power-absorbing 23 can be effectively prevent to be issued in the impact of bump stroke
Life radially deforms, and improves the stability and reliability of endergonic process.
Further, referring to Fig. 5, a kind of specific embodiment party as buffering anti-collision device provided by the utility model
Formula is provided with multiple anti-climbing teeth 13 on the lateral surface of above-mentioned Crashworthy plate 10, and the anti-climbing tooth 13 is from one end of Crashworthy plate 10 towards anti-
The other end extension of plate 10 is hit, i.e., anti-climbing tooth 13 is laterally distributed on the lateral surface of Crashworthy plate 10.Preferably, multiple anti-climbing teeth 13
Equidistantly arrangement, and is integrally cast with Crashworthy plate 10, certainly, as the case may be and demand, in the utility model
In other embodiments, anti-climbing tooth 13 can also be connect with Crashworthy plate 10 by modes such as welding, not limited uniquely herein；Anti- climbing tooth
13 are mainly used on rail traffic vehicles, and when colliding, the anti-climbing tooth intermeshing on the vehicle of two collisions prevents vehicle
Occur mutually to ride and climb, protect the personal safety of driver and conductor to the maximum limit.
Further, Fig. 5 and Fig. 6 are please referred to, a kind of specific reality as buffering anti-collision device provided by the utility model
Mode is applied, above-mentioned buffering anti-collision device 1 further includes fixing piece 30, and the fixing piece 30 and one end of lead 21 are detachably connected,
For connecting vehicle end carriage 2, meanwhile, it is offered at the middle part of above-mentioned Crashworthy plate 10 and pulls interface 14, which is located at
The interval of two neighboring anti-climbing tooth 13, and pull interface 14 and be connected with storage tank 100.Specifically, interface 14 is being pulled
Structural connecting plates (not marking) are inside provided with, it is interior on structural connecting plates to offer via 140, at the top of Crashworthy plate 10 and bottom
Portion offers third mounting hole 15, meanwhile, the 4th peace is offered in one end across mounting flange 24 of above-mentioned lead 21
Hole 213 is filled, when buffering anti-collision device 1 is installed on vehicle, lead 21 passes through vehicle end carriage 2 to connect with the fastening of fixing piece 30
It connects, herein, fixing piece 30 is screwed in the 4th mounting hole 213 by one end of bolt and is fastenedly connected, and then and vehicle with lead 21
The cooperation of end carriage 2 increases the tensile loads of buffering anti-collision device 1.In this way, in the case where vehicle is fitted without towing hook, trailer
Third mounting hole 15 and via 140 can be passed through to connect to realize the traction to vehicle with the structural connecting plates by axis pin, expanded
The scope of application of buffering anti-collision device 1.
Further, Fig. 3 and Fig. 5 are please referred to, a kind of specific reality as buffering anti-collision device provided by the utility model
Mode is applied, reinforcing rib 16 is provided at both ends in above-mentioned Crashworthy plate 10, for increasing the structural strength at 10 both ends of Crashworthy plate.Specifically
Ground, the front end of above-mentioned lead 21 offer escape groove 211, and the second mounting hole is offered on the cell wall of escape groove 211
212, meanwhile, connector 11 is provided on the inside of Crashworthy plate 10, connector 11 is accommodated in storage tank 100, from storage tank
100 slot bottom protrusion, and the first mounting hole is offered on connector 11, lead 21 passes through the first mounting hole by axis pin
It is rotatablely connected with the second mounting hole 212 with Crashworthy plate 10, and then lead 21 can be rotated around axis pin along escape groove 211；In anticollision
The inside of plate 10 is provided at both ends with reinforcing rib 16, and the lateral surface at the both ends of Crashworthy plate 10 is in arc-shaped, i.e., from above-mentioned anti-creep
The end of tooth 13 is towards the inner arc transition of Crashworthy plate 10, and when angle collision occurs, i.e. the end of Crashworthy plate 10 collides with foreign object
When, it is so common to make since the lateral surface of the end of Crashworthy plate 10 is cambered surface, and Crashworthy plate 10 is rotatablely connected with lead 21
A part of impact load can be drained under, and due to being additionally arranged reinforcing rib 16 on the inside of the end of Crashworthy plate 10, and then improved
The anti-angle collision performance of buffering anti-collision device 1.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
1. buffering anti-collision device, which is characterized in that be connected to including the Crashworthy plate with storage tank and symmetrically the Crashworthy plate
Two energy absorbers of the same side, the energy absorber include one end and the lead of Crashworthy plate rotation connection, are placed in institute
State in storage tank and with the buffer element of the lead pivot bush unit, pivot bush unit in the power-absorbing on the lead,
And pivot bush unit is used to connect by the mounting flange of protection body on the lead；The buffer element, the energy-absorbing
Element and the mounting flange are detachably connected successively from one end of the lead to the other end of the lead.
2. buffering anti-collision device as described in claim 1, which is characterized in that the energy absorber, which further includes, is located in described delay
It rushes the guide plate of the interval of element and the power-absorbing, the guide plate and the lead pivot bush unit and institute can be stretched into
It states in storage tank.
3. buffering anti-collision device as claimed in claim 2, which is characterized in that limiting is offered on the end face of the guide plate
Slot is convexly equipped with defining flange on the other end of the guide plate, and shape in the limiting slot is stretched into the side of the buffer element
Into limiting, the defining flange, which stretches into, forms limiting in the gap between the power-absorbing and the lead.
4. buffering anti-collision device as claimed in claim 3, which is characterized in that the bearing strength of the buffer element is less than described
The bearing strength of power-absorbing.
5. buffering anti-collision device as claimed in claim 4, which is characterized in that the buffer element is rubber parts or polyurethane
Part.
6. buffering anti-collision device as claimed in claim 4, which is characterized in that the power-absorbing is honeycomb structure part.
7. buffering anti-collision device as claimed in claim 6, which is characterized in that covered with gold on the periphery wall of the power-absorbing
Belong to covering.
8. buffering anti-collision device as described in any one of claim 1 to 7, which is characterized in that on the lateral surface of the Crashworthy plate
It is provided with the multiple anti-climbing teeth extended from one end of the Crashworthy plate towards the other end of the Crashworthy plate.
9. buffering anti-collision device as claimed in claim 8, which is characterized in that the buffering anti-collision device, which further includes, detachably to be connected
The fixing piece for being used to connect vehicle end carriage of one end of the lead is connected to, is offered in the middle part of the Crashworthy plate positioned at adjacent
The pulling interface of the interval of the two anti-climbing teeth, the pulling interface are connected with the storage tank.
10. buffering anti-collision device as claimed in claim 8, which is characterized in that the Crashworthy plate is provided at both ends with reinforcing rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721440869.3U CN207466571U (en) | 2017-10-31 | 2017-10-31 | Buffering anti-collision device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721440869.3U CN207466571U (en) | 2017-10-31 | 2017-10-31 | Buffering anti-collision device |
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| Publication Number | Publication Date |
|---|---|
| CN207466571U true CN207466571U (en) | 2018-06-08 |
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ID=62262383
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| CN201721440869.3U Active CN207466571U (en) | 2017-10-31 | 2017-10-31 | Buffering anti-collision device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110341744A (en) * | 2019-07-11 | 2019-10-18 | 深圳市乾行达科技有限公司 | Crash energy absorption equipment |
| CN113173193A (en) * | 2021-04-19 | 2021-07-27 | 中车青岛四方车辆研究所有限公司 | Anti-creep energy-absorbing device |
| CN113335331A (en) * | 2021-06-25 | 2021-09-03 | 中车唐山机车车辆有限公司 | Energy absorption device and rail vehicle |
-
2017
- 2017-10-31 CN CN201721440869.3U patent/CN207466571U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110341744A (en) * | 2019-07-11 | 2019-10-18 | 深圳市乾行达科技有限公司 | Crash energy absorption equipment |
| CN113173193A (en) * | 2021-04-19 | 2021-07-27 | 中车青岛四方车辆研究所有限公司 | Anti-creep energy-absorbing device |
| CN113335331A (en) * | 2021-06-25 | 2021-09-03 | 中车唐山机车车辆有限公司 | Energy absorption device and rail vehicle |
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