CN109204368B - A kind of reusable rail vehicle anticollision endergonic structure - Google Patents
A kind of reusable rail vehicle anticollision endergonic structure Download PDFInfo
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- CN109204368B CN109204368B CN201811111126.0A CN201811111126A CN109204368B CN 109204368 B CN109204368 B CN 109204368B CN 201811111126 A CN201811111126 A CN 201811111126A CN 109204368 B CN109204368 B CN 109204368B
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- damping
- guide pipe
- endergonic structure
- hit
- piston
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL 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
- B61F19/00—Wheel guards; Bumpers; Obstruction removers or the like
- B61F19/04—Bumpers or like collision guards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Dampers (AREA)
Abstract
The present invention provides a kind of reusable rail vehicle anticollision endergonic structure, including the bar that is hit, outer tube, damping structure, reply structure and end seat；Damping structure includes damping plug, guide pipe, damped elasticity element and end small footprint, and the reply structure includes replying piston and elasticity recovery element；Outer tube is tubular structure and inside is divided into front cavity and rear chamber by partition, damping hole is set on partition, damper fluid is circulated between the cavity of front and back；In initial position, at least partial-length is arranged in the damping hole damping plug, and damping plug can move forward and backward when being hit, gap is formed between damping plug radial direction thickness and damping hole and is circulated between the cavity of front and back for damper fluid, and via hole is additionally provided on guide pipe enables damper fluid to circulate in the cavity of front and back.The endergonic structure energy-absorbing effect is good, can reduce the injury carried out in secondary collision to occupant, and cost that is reusable thus can significantly reduce endergonic structure.
Description
Technical field
The invention belongs to safety device fields used for rail vehicle, and in particular to a kind of reusable rail vehicle anti-collision
It hits and uses endergonic structure.
Background technique
With the development of rail traffic, people increasingly pay attention to the security performance of rail vehicle.In current orbit vehicle
Endergonic structure is mainly based on metal collapse energy-absorption, and the structure can not be used again after conquassation.Its mechanics characteristic curve is general
To there is the zigzag wave of very big peak value, there is very high triggering threshold requirement, cause deceleration peak value very big, be unfavorable for occupant
Safety.
In the patent of invention CN201610860262.4 and CN201610115228.4 that the present inventor formerly studies
It is each provided with a kind of collision energy-absorbing device used for rail vehicle, these collision energy-absorbing devices achieve good crusherbull zone effect
Fruit, but these devices cannot all be reused.
In other fields, such as automobile collision energy absorber field, wherein some is using reusable oleo cushion
Device.But the impact velocity limit and its absorbable energy level that the apparatus structure of these types can be born all are unable to satisfy at all
The related request in rail vehicle field.
Therefore, a kind of reusable rail vehicle anticollision endergonic structure is urgently developed in this field.
Summary of the invention
Therefore, the present invention provides a kind of reusable rail vehicle anticollision endergonic structure, the endergonic structure
Including the bar that is hit, outer tube, damping structure, reply structure and end seat；The damping structure include damping plug, guide pipe,
Damped elasticity element and end small footprint, the reply structure include replying piston and elasticity recovery element；The outer tube is pipe
Shape structure and inside by partition is divided into front cavity and rear chamber, the damping hole that through hole shape is provided on the partition to damp
Fluid can circulate between front cavity and rear chamber；The bar that is hit includes holding and being located at rear end positioned at being hit for front end
Piston end, the piston end of the bar that is hit is arranged in outer tube, and the end that is hit is arranged other than outer tube；The damping plug is first
At least damping plug can be along energy-absorbing in the damping hole, and when endergonic structure is hit for partial-length setting when beginning position
The front-rear direction of structure moves, and the rear end of outer tube with end seat by being fixedly connected so that entire endergonic structure is capable of fixing setting
On the rail vehicle, it is provided with guide pipe in the rear chamber, damped elasticity element, end small footprint, replys piston and reply
Elastic element, guide pipe is tubular structure and its front end is connected through plate and is fixed on the partition, is set on guide pipe
Being equipped with via hole makes the rear end of damping plug pass through the via hole and be arranged in inside guide pipe, and the inside fixation of guide pipe rear end is set
It is equipped with end small footprint, and through the damped elasticity element to be fixed at end small for the rear end of damping plug in initial position
On pedestal, the radial dimension of the rear end of the damping plug is matched with the internal diameter of the guide pipe, thus the endergonic structure by
The rear end of damping plug can be moved forward and backward along the inner wall of guide pipe after impact；After the axial direction of guide pipe is arranged in the reply piston
End is replied piston in initial position and is fixed in end seat through the elasticity recovery element, and in the energy-absorbing knot
Structure is replied piston after being hit and can be moved forward and backward under the guiding of outer tube wall；The damper fluid is filled in the rod rear end that is hit
In cavity between reply piston nose；The size of the damping plug radial direction thickness is less than the radial dimension of damping hole, makes
Form gap between the two and circulate between front cavity and rear chamber for damper fluid, and conducting is additionally provided on guide pipe
Hole enable damper fluid front cavity, gap, via hole and in guide pipe and end small footprint with the rear chamber of exterior domain
Middle flowing.
In a kind of specific embodiment, the gap be width 0.01~5mm circumferential weld, preferably 0.5~
1.5mm。
In a kind of specific embodiment, the front end of the damping plug is front fine and rear thick truncated cone-shaped or pyramid platform shape knot
Structure.
In a kind of specific embodiment, the damped elasticity element and elasticity recovery element are spring and indifferent gas
One of body.
In a kind of specific embodiment, the damped elasticity element be spring when, spring rate be 50~
2000N/mm, preferably 100~1000N/mm.
In a kind of specific embodiment, the damper fluid is hydraulic oil.
In a kind of specific embodiment, when original state, the rear end face for the bar that is hit is between the front end face of partition
Cavity volume be greater than partition rear end face to reply piston front end face between cavity volume.
In a kind of specific embodiment, the endergonic structure further include setting end small footprint and reply piston it
Between excessively reply and collide the block piece of end small footprint for preventing from replying piston, the preferably described block piece is fixed setting
Blocker ring on outer tube wall.
In a kind of specific embodiment, the endergonic structure further include setting outer tube front end and setting by
The sealing element of radial outside in the middle part of impact bar, the connecting plate of the preferably described guide pipe front end be bolted setting it is described every
On plate.
In a kind of specific embodiment, the axial width of the partition is d, and d is 5~100mm, and preferably d is 15
~45mm；In initial position, the front end face of the damping plug is concordant with the front end face of the partition to be arranged or institute endergonic structure
State damping plug front end face the front end face of the partition is set before 0.5d distance within or the damping plug front end face
It is arranged within the 0.8d distance after the front end face of the partition.
In a kind of specific embodiment, the internal diameter of guide pipe is greater than the radial dimension of via hole, and guide pipe
Internal diameter is more than or equal to the radial dimension of damping hole.
The present invention at least has the following beneficial effects:
1, in the present invention in the initial position of damping structure, the front end of damping plug is set in damping hole, when damping is tied
After structure is hit, to be damped the volume that plug fills up in damping hole because damping plug is gradually backed out damping hole backward and becomes smaller,
The damping process that the volume of damper fluid becomes larger, thus occurs after an impact in the present invention in corresponding damping hole is " non-
It is constant " process, the collision process of " constant damper fluid packing volume in damping hole " is more gentle than in the prior art.
2, in a kind of preferred mode, pre-small post-large truncated cone-shaped or rib are set by the front end of damping plug in the present invention
When vertebra platform shape, after endergonic structure is hit, not only damping plug exits in damping hole the variation for causing axial upper volume, and
Size also changes radially for the front end of damping plug in damping hole, " the non-perseverance in damping hole after collision so that of the present invention
The variation of fixed damper fluid packing volume " becomes apparent, the crusherbull zone process damping more cylindrical or prismatic than using
It fills in gentler when front end.
3, in the present invention, damping plug is different in the pressure that different location is damped elastic element and damper fluid, by
Under impact conditions, the damping structure can adjust automatically damping plug protrude into the length in damping hole, form different damping structures, from
And reach gentle damping.
4, generally speaking, for damping structure of the present invention after being collided, mechanics characteristic curve is very perfect, damping
Zero trigger force of structure, resistance rise fast, and cushion effect is steady, and energy-absorbing effect is good, can reduce in secondary collision to occupant into
Capable injury, and cost that is reusable thus can significantly reduce damping structure.
Detailed description of the invention
Fig. 1 is the surface structure schematic diagram of endergonic structure of the present invention.
Fig. 2 is the main view of structure shown in Fig. 1.
Fig. 3 is the sectional view along A-A of structure shown in Fig. 1 and Fig. 2.
Fig. 4 is the portion enlarged diagram of structure shown in Fig. 3.
Fig. 5 is the surface structure schematic diagram of damping structure in endergonic structure of the present invention.
Fig. 6 is the main view of structure shown in Fig. 5.
Fig. 7 is the B-B direction cross-sectional view of structure shown in Fig. 5 and Fig. 6.
Fig. 8 is collision simulation result of the endergonic structure of the present invention under different spring rates.
Specific embodiment
The present invention is illustrated with following embodiment and attached drawing, but protection scope of the present invention is not limited to that, this hair
Bright protection scope should be subject to claims.
Embodiment 1
As shown in Fig. 1~7, the present invention provides a kind of reusable rail vehicle anticollision endergonic structure, described
Endergonic structure includes be hit bar, outer tube, damping structure, reply structure and end seat；The damping structure include damping plug,
Guide pipe, damped elasticity element and end small footprint, the reply structure include replying piston and elasticity recovery element；It is described outer
Pipe is tubular structure and inside is divided into front cavity and rear chamber by partition, and the damping hole that through hole shape is provided on the partition makes
Obtaining damper fluid can circulate between front cavity and rear chamber；The bar that is hit includes positioned at be hit end and the position of front end
The piston end of piston end in rear end, the bar that is hit is arranged in outer tube, and the end that is hit is arranged other than outer tube；The damping
In initial position, at least partial-length is arranged in the damping hole plug, and the damping plug energy edge when endergonic structure is hit
The front-rear direction movement of endergonic structure, the rear end of outer tube by being fixedly connected with end seat entire endergonic structure is consolidated
Fixed setting on the rail vehicle, is provided with guide pipe, damped elasticity element, end small footprint, replys piston in the rear chamber
With elasticity recovery element, guide pipe is tubular structure and its front end is connected through plate and is fixed on the partition, is oriented to
Via hole is provided on pipe makes the rear end of damping plug pass through the via hole and be arranged in inside guide pipe, the inside of guide pipe rear end
It is fixedly installed end small footprint, and the rear end of damping plug is fixed at through the damped elasticity element in initial position
In the small footprint of end, the radial dimension of the rear end of the damping plug is matched with the internal diameter of the guide pipe, thus in the energy-absorbing
The rear end of damping plug can be moved forward and backward along the inner wall of guide pipe after structure is hit；Guide pipe is arranged in the reply piston
Axial rearward end is replied piston in initial position and is fixed in end seat through the elasticity recovery element, and described
Endergonic structure is replied piston after being hit and can be moved forward and backward under the guiding of outer tube wall；The damper fluid, which is filled in, to be hit
In cavity between rod rear end and reply piston nose；The size of the damping plug radial direction thickness is less than the radial ruler of damping hole
It is very little, so that forming gap between the two and circulating between front cavity and rear chamber for damper fluid, and also set up on guide pipe
Have via hole enable damper fluid front cavity, gap, via hole and in guide pipe and end small footprint with exterior domain
It is flowed in rear chamber.
It should be noted that heretofore described " being fixedly connected " or " fixed setting " include that welding etc. is non-removable
It is fixedly connected with mode and is removably fixedly connected with mode with being spirally connected etc..Heretofore described initial position is damping structure by outer
State before power shock.Heretofore described axial direction, that is, damping structure front-rear direction, and it is radial be to axial for
Direction, " radial dimension " in the present invention does not represent corresponding component and is only the cylindrical or symmetrical shape of truncated cone-shaped isoperimetric,
Being also possible to section is the shapes such as triangle, quadrangle or other polygons.
Specifically, the damping hole is, for example, the cylindrical hole of 1~80mm of diameter, damping hole is diameter 30mm's in figure
Cylindrical hole, the front end of corresponding damping plug be most thin place diameter be 20mm, thickness diameter is 28mm and front fine and rear thick rotary table, resistance
The height of the truncated cone-shaped front end of Buddhist nun's plug and the consistency of thickness of partition, shape between the truncated cone-shaped front end of damping plug and cylindrical damping hole
Cyclic slit width degree is the gap of 1mm.The internal diameter of the outer tube is 100mm, and the axial length of front cavity (is hit when initial position
The rear end face of bar is to the length between the front end face of partition) be 80mm and the axial length of rear chamber (rear end face of partition is to returning
Bring back to life the length between the front end face of plug) it is 30mm.In the present invention, in initial position, the front end face of the damping plug and institute
The front end face for stating partition is concordantly arranged, described under the action of the reply piston and elasticity recovery element after collision
The front end face of damping plug returns to the position concordant with the front end face of the partition.
In a kind of specific embodiment, the damped elasticity element and elasticity recovery element are spring and indifferent gas
One of body.When the damped elasticity element and elasticity recovery element are spring, the rear end of damping plug and damped elasticity member
The front end of part is fixedly connected, and the rear end of damped elasticity element is fixedly connected with end small footprint；Reply rear end and the reply of piston
The front end of elastic element is fixedly connected, and the rear end of elasticity recovery element is fixedly connected with end seat.Work as the resistance when described
When Buddhist nun's elastic element and elasticity recovery element are inert gas, by the inert gas for filling certain pressure in respective cavities
And make in initial position, damping plug and the relative position of end small footprint are fixed, and the opposite of piston and end seat is replied
Position is fixed.During endergonic structure is hit, inert gas is compressed, and internal pressure increases, after impact, outside
Portion's pressure reduction, inert gas internal pressure is greater than external pressure at this time, and inert gas will push reply piston and be returned to initially
Position.In the present invention, the damper fluid can be hydraulic oil, be also possible to the biggish fluid of other viscosity.
In a kind of specific embodiment, the endergonic structure further include setting outer tube front end and setting by
The sealing element 2 of radial outside in the middle part of impact bar.Specifically, the axial air gap on front side of the piston end for the bar that is hit between sealing element
It is set as vacuum.In the present invention, the sealing element 2 primarily serves following several effects, first is that blocking is hit, bar 1 is replied forward
When limit of sports record position, second is that sealing element 2 and outer tube 3 are provided separately and entire damping structure can be made in assembly and maintenance
Most convenient for processing, such as in assembly it is not necessary that the company of weldering again is truncated in outer tube, third is that sealing element 2 further plays damping stream to outer tube
The effect of body sealing, prevents damper fluid from leaking to other than endergonic structure.
In a kind of specific embodiment, the axial width of the partition is d, and d is 5~100mm, and preferably d is 15
~45mm；In initial position, the front end face of the damping plug is concordant with the front end face of the partition to be arranged or the damping plug
Front end face the front end face of the partition is set before 0.5d distance within or the damping plug front end face be arranged in institute
It states within the 0.8d distance after the front end face of partition.In the present invention, when initial position, if described in the front end face of damping plug stretches out
The front end face of partition is too long, then may be damaged damping plug when damping structure is hit, and if the front end face of damping plug is stepped back
The front end face of the partition is too long, then is difficult to reach ideal impact effect.Damping hole is exited completely in the front end face of damping plug
And when entering in rear chamber, because flowing of the damper fluid at gap becomes flowing of the damper fluid in entire damping hole, because
And any damping is not almost had at this time.
The working principle of endergonic structure is as follows in the present invention: certain mass and the shock of the object of speed are hit after bar 1, by
Impact bar 1 compresses the damper fluid in front cavity, and damper fluid generates damping force by damping structure.In impact process, resistance
Ni Sai is moved under the effect of damper fluid pressure along guide pipe backward, and the damped elasticity element being connected with damping plug is to damping
It is plugged with reaction force.Both this effect can be such that damping plug moves forward and backward along guide pipe, during the motion damping plug and damping
The relative position in hole changes, and forms continually changing damping structure, to reach preferable damping.It was impacting
Cheng Zhong replys piston under the action of damper fluid pressure along the inner wall of outer tube with the increase of damper fluid in rear chamber
It moves backward.After impact, replys piston and be returned to initial position under the action of elasticity recovery element.In Recovery Process
In, reply piston will push damper fluid and the bar that is hit returns back to the initial position before impact occurs.
Fig. 8 is collision simulation result of the endergonic structure of the present invention under different damping spring rate.It is emulation in figure
The spring and rigidity that simulation stiffness spring (incompressible), rigidity are 1000N/mm are 400N/mm (its bullet than 1000N/mm
Spring is easy to be compressed) the emulation number that is obtained in 1 ton of object with 7 metre per second (m/s) velocity shock damping structures of the present invention of spring
According to.The simulated effect from figure it is found that damping spring rigidity be 400N/mm when, the collision energy-absorbing excellent effect of the endergonic structure.
The above content is combine specific preferred embodiment to the further description of the invention made, and it cannot be said that originally
The specific implementation of invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, not
Under the premise of being detached from present inventive concept, several simple deductions and replacement can also be made, all shall be regarded as belonging to guarantor of the invention
Protect range.
Claims (10)
1. a kind of reusable rail vehicle anticollision endergonic structure, the endergonic structure includes the bar (1), outer of being hit
It manages (3), damping structure (4), reply structure and end seat (7)；
The damping structure includes damping plug (8), guide pipe (10), damped elasticity element (11) and end small footprint (12), institute
Stating and replying structure includes replying piston (5) and elasticity recovery element (6)；
The outer tube is tubular structure and inside is divided into front cavity (14) and rear chamber (15) by partition, is arranged on the partition
There is the damping hole (13) of through hole shape that damper fluid is circulated between front cavity and rear chamber；
The bar that is hit includes be hit end and the piston end positioned at rear end positioned at front end, the piston end setting for the bar that is hit
In outer tube, and the end that is hit is arranged outside outer tube；
The damping plug at least partial-length setting in initial position is hit in the damping hole, and in endergonic structure
When damping plug can be moved along the front-rear direction of endergonic structure, the rear end of outer tube with end seat by being fixedly connected so that entire
Endergonic structure is capable of fixing setting on the rail vehicle, and guide pipe, damped elasticity element, end handle are provided in the rear chamber
Seat replys piston and elasticity recovery element, and guide pipe is tubular structure and its front end is connected through plate (101) and is fixed at
Via hole (102) is provided on the partition, on guide pipe makes the rear end of damping plug pass through the via hole and guide pipe is arranged in
Inside is fixedly installed end small footprint on the inside of guide pipe rear end, and in initial position damping plug rear end through the resistance
Buddhist nun's elastic element and be fixed in the small footprint of end, the radial dimension of the rear end of the damping plug is interior with the guide pipe
Diameter matching, thus the rear end of damping plug can be moved forward and backward along the inner wall of guide pipe after the endergonic structure is hit；It is described
The axial rearward end that guide pipe is arranged in piston is replied, piston is replied in initial position and is fixedly installed through the elasticity recovery element
Reply piston can move forward and backward under the guiding of outer tube wall in end seat, and after the endergonic structure is hit；
The damper fluid is filled in the cavity being hit between rod rear end and reply piston nose；The damping plug is radial most
The size slightly located be less than damping hole radial dimension so that between the two formed gap and for damper fluid in front cavity and rear chamber
Between circulate, and be additionally provided on guide pipe via hole (16) enable damper fluid front cavity, gap, via hole and
In guide pipe and end small footprint to flow in the rear chamber of exterior domain.
2. endergonic structure according to claim 1, which is characterized in that the gap is ring of the width in 0.5~1.5mm
Seam.
3. endergonic structure according to claim 1, which is characterized in that the front end of the damping plug is front fine and rear thick rotary table
Shape or pyramid platform shape structure.
4. endergonic structure according to claim 1, which is characterized in that the damped elasticity element and elasticity recovery element are equal
For one of spring and inert gas.
5. endergonic structure according to claim 4, which is characterized in that when the damped elasticity element is spring, spring
Rigidity is 100~1000N/mm.
6. endergonic structure according to claim 1, which is characterized in that the damper fluid is hydraulic oil.
7. endergonic structure according to claim 1, which is characterized in that the endergonic structure further includes being arranged in end handle
It is used to prevent to reply the block piece (17) that end small footprint was excessively replied and collided to piston between seat and reply piston, and described
Block piece is the blocker ring being fixed on outer tube wall.
8. endergonic structure described according to claim 1~any one of 7, which is characterized in that the endergonic structure further includes
Be arranged in outer tube front end and in the middle part of the bar that is hit radial outside sealing element (2), and the connecting plate of the guide pipe front end
It is fixed on the partition by bolt (9).
9. endergonic structure described according to claim 1~any one of 7, which is characterized in that the axial width of the partition
For d, and d is 15~45mm；For endergonic structure in initial position, the front end face of the front end face of the damping plug and the partition is flat
The front end face of neat setting or the damping plug front end face of the partition is set before 0.5d distance within or the resistance
The front end face of Buddhist nun's plug is arranged within the distance of the 0.8d after the front end face of the partition.
10. endergonic structure described according to claim 1~any one of 7, which is characterized in that the internal diameter of guide pipe is big
In the radial dimension of via hole, and the internal diameter of guide pipe is greater than or equal to the radial dimension of damping hole.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811111126.0A CN109204368B (en) | 2018-09-22 | 2018-09-22 | A kind of reusable rail vehicle anticollision endergonic structure |
| EP18934185.2A EP3778343B1 (en) | 2018-09-22 | 2018-10-30 | Reusable collision energy absorption device for rail vehicle |
| PCT/CN2018/112615 WO2020056849A1 (en) | 2018-09-22 | 2018-10-30 | Reusable collision energy absorption device for rail vehicle |
| US17/044,826 US12012130B2 (en) | 2018-09-22 | 2018-10-30 | Reusable collision energy absorption device for rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811111126.0A CN109204368B (en) | 2018-09-22 | 2018-09-22 | A kind of reusable rail vehicle anticollision endergonic structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109204368A CN109204368A (en) | 2019-01-15 |
| CN109204368B true CN109204368B (en) | 2019-07-02 |
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ID=64985168
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811111126.0A Active CN109204368B (en) | 2018-09-22 | 2018-09-22 | A kind of reusable rail vehicle anticollision endergonic structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN109204368B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108860206B (en) * | 2018-09-22 | 2019-05-28 | 中南大学 | A kind of reusable collision energy-absorbing device used for rail vehicle |
| CN111439287B (en) * | 2020-04-26 | 2020-12-29 | 中车青岛四方车辆研究所有限公司 | Anti-climbing energy-absorbing device for train |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1428767A (en) * | 1972-02-26 | 1976-03-17 | Baya Pena J | Vehicle-mounted bumper assemblies |
| CN2456972Y (en) * | 2000-09-30 | 2001-10-31 | 于新潮 | Collosion buffer device of automobile |
| CN201102518Y (en) * | 2007-04-09 | 2008-08-20 | 广州大学 | Simple and effective energy-absorbing device for vehicle collision |
| CN108860206A (en) * | 2018-09-22 | 2018-11-23 | 中南大学 | A kind of reusable collision energy-absorbing device used for rail vehicle |
-
2018
- 2018-09-22 CN CN201811111126.0A patent/CN109204368B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1428767A (en) * | 1972-02-26 | 1976-03-17 | Baya Pena J | Vehicle-mounted bumper assemblies |
| CN2456972Y (en) * | 2000-09-30 | 2001-10-31 | 于新潮 | Collosion buffer device of automobile |
| CN201102518Y (en) * | 2007-04-09 | 2008-08-20 | 广州大学 | Simple and effective energy-absorbing device for vehicle collision |
| CN108860206A (en) * | 2018-09-22 | 2018-11-23 | 中南大学 | A kind of reusable collision energy-absorbing device used for rail vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109204368A (en) | 2019-01-15 |
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