CN206171374U - Car bumper buffer structure - Google Patents
Car bumper buffer structure Download PDFInfo
- Publication number
- CN206171374U CN206171374U CN201621129195.0U CN201621129195U CN206171374U CN 206171374 U CN206171374 U CN 206171374U CN 201621129195 U CN201621129195 U CN 201621129195U CN 206171374 U CN206171374 U CN 206171374U
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- CN
- China
- Prior art keywords
- bumper
- buffer structure
- grid
- pillar
- thin
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a car bumper buffer structure, including bumper shock attenuation crossbeam, the outer baffle of bumper and setting buffer structure between the baffle outside bumper shock attenuation crossbeam and bumper, its characterized in that: is buffer structure bionical pillar the grid structural layer, this pillar the grid structural layer comprises the the wall of grille of polygon grid unit and the thin -walled column who sets up in grid wall intersection, thin -walled column is prismatic wave form with the cross -section that the direction of height is followed to the grid, at the deformation guide line of the wall of grille with intersection's formation wave form of thin -walled column. The utility model discloses bumper buffer structure energy -absorbing is big, the power consumption is stable, effective collision back speed of a motor vehicle that reduces, and the highest safe speed in the time of can further improving car crash safety is applicable to automobile part design especially and makes field or the similar structure that has the anticollision to require, can effectively ensure major structure and people's life safety.
Description
Technical field
This utility model is related to a kind of auto parts machinery, more particularly to a kind of bumper buffer structure.
Background technology
Bumper is to absorb first preventer for relaxing safety before and after foreign impacts power, protection vehicle body, is coordinated
Second preventer-energy-absorption box-ensures the safety of vehicle body and occupant jointly.With auto industry and highway communication
Development, car speed is also more and more faster.The road that bumper has also moved towards to reform as a kind of important safety device, it is existing
Some bumpers mainly include:Bumper outer baffle and bumper damping crossbeam, it is mainly bent and deformed and is consumed
Energy.Existing bumper occurs that during slight impact vehicle body and occupant's safety can be ensured.But when generation is than larger
During collision, will display the drawbacks of consumed energy using bumper flexural deformation, it is weak to show as its impact resistance, buffering effect
It is really poor, larger secondary collision injury can be produced, using dangerous.
The content of the invention
Technical problem to be solved in the utility model is the deficiency existed for above-mentioned prior art, and provides one kind and carry
The bumper of high automatic buffer damping effect.
To solve above-mentioned technical problem, the technical solution adopted in the utility model is：
A kind of bumper with buffer structure, including bumper damping crossbeam, bumper outer baffle and setting
Buffer structure between bumper damping crossbeam and bumper outer baffle, it is characterised in that：The buffer structure is bionical little
Post-cell structure layer, the pillar-cell structure layer by polygon grill unit grid wall and be arranged on cell walls intersection
Thin-walled column is constituted.The thin-walled column is prismatic waveform along the section of short transverse with grid, in grid wall and thin-walled column
Intersection forms the deformation guide line of waveform.In collision process, inhaled by the deformation of this utility model bumper buffer structure
Power consumption collision energy is received, wherein mainly being consumed energy by the compression and flexural deformation of pillar-cell structure layer.Thin-walled column dative
The section of grid wall is provided with the waveform of sine wave or cosine wave or the two combination, and the deformation that can make pillar-cell structure layer consumes
Energy performance is more fully and stable.
The waveform be sine wave y=Asinx or cosine wave y=Aconx or composite wave y=A (conx+sinx), its width
Value A is determined that wherein P is the maximum compression strength without box body during sine wave by following formula, and F is highest resistance to compression required when using
Intensity, x is the variable along short transverse, and dx is to carry out differential to x：
Only sine wave when：
Only cosine wave when：
When sine wave is with cosine wave composite wave：
Pillar-cell structure the layer for being provided with sine wave or cosine wave deformation guide line can by formed by integrally casting molding or
Machining mode is formed.
The polygon grill unit is triangle, tetragon or hexagon.
The material selection steel of bumper, aluminium alloy or fibrous composite.
Bumper damping crossbeam and bionical pillar-grid wall construction layer are by being integrally formed, welding or binding agent is connected.
Bionical pillar-grid wall construction layer is connected by welding or binding agent with bumper outer baffle.
Bumper damping crossbeam is plane or curved surface with the outer surface of outer baffle.
This utility model bumper, outside its bumper damping crossbeam, bionical pillar-cell structure layer and bumper
There is first compression to consume energy in the deformation sequence of baffle plate, wait its complete collapse rear bumper to subtract for pillar-cell structure layer
Shake crossbeam and bumper outer baffle occur bending and deformation to consume energy.
When there is larger collision, in addition to existing bumper outer baffle and bumper damping crossbeam, also in
Between bionical pillar-grid wall construction layer：Both consumed energy by the flexural deformation of bumper, more by middle pillar-cell structure
Compression Dissipative Collisions energy.From mechanics principle, the efficiency for compressing power consumption is far above bending energy-wasting, anti-equivalent to twice
Protection unit considerably increases the buffering and damping effect of bumper so as to play dual cushioning effect, improves car insurance
The shock resistance of thick stick and using safety, further improves safe speed during car crass, and emphasis is applied to auto parts and components
Manufacture and design field or the similar structure for having an anticollision requirement, can effective guarantee agent structure and people life security.
Pillar-cell structure has outstanding deformation energy dissipation capacity, whole car insurance in this utility model car insurance
Deformation sequence in thick stick collision process is：There is first compression to consume energy in pillar-cell structure layer, wait its complete collapse
Afterwards, bumper outer baffle and bumper damping crossbeam occur bending and deformation to consume energy.Compared to existing bumper, this reality
It it is 3~5 times of existing bumper with new deformation energy dissipation capacity；(it is not provided with deformed sine wave to draw compared to straight tube
Guide groove) compression energy-dissipation structure layer, this utility model not only has to consume energy stablizes, makes full use of the spy of material plasticity deformability
Point, and the impact force peak value of car crass moment can be effectively reduced, it is reduced as far as the huge punching of impact moment generation
Hit power to threaten the safety of occupant.Therefore the bumper buffer structure can quickly absorb collision energy, consume
Can be stable, collision rift speed is effectively reduced, maximum safe speed during automobile safety collision is further improved, emphasis is applied to vapour
Car parts design manufactures field or the similar structure for having an anticollision requirement, can effective guarantee agent structure and people life peace
Entirely.
Description of the drawings
Fig. 1 is the structural representation of this utility model bumper.
Fig. 2 is bionical pillar-grid wall construction layer schematic diagram in this utility model bumper (by taking sine wave as an example).
Fig. 3 is bionical pillar-grid wall construction side view in this utility model bumper (by taking sine wave as an example).
Fig. 4 is this utility model bumper buffer structure and traditional insurance thick stick impact kinetic energy curve.
Number in figure：1 bumper damping crossbeam；2 is pillar-grid wall construction layer；3 is bumper outer baffle；4 are connection
Bolt hole；5 is hasp；6 is bumper outer baffle lightening hole；7 are deformation guide line；8 is thin-walled column；9 is grid wall.
Specific embodiment
The bumper buffer structure schematic diagram of this utility model embodiment, middle bionical pillar-grid wall construction layer and
Deformed sine wave guide line schematic diagram respectively as shown in Figure 1, Figure 2 and Figure 3.
The bumper buffer structure includes bumper damping crossbeam 1 and bumper outer baffle 3, horizontal in bumper damping
Bionical pillar-cell structure layer 2 with shock absorbing effect is set between beam 1 and bumper outer baffle 3.Wherein bumper subtracts
Shake crossbeam 1 is fixed by bolt hole 4 and vehicle body, and is fixed with bumper outer baffle by hasp 5.Pillar-cell structure layer 2 by
Grid wall is constituted, and along cell walls intersection thin-walled column is provided with, and thin-walled column 8 is each formed with deforming guide line 7 with grid wall 9,
Can be formed by formed by integrally casting molding or machining mode.The deformation power consumption order of whole bumper is in collision process：It is little
There is first compression to consume energy in post-cell structure layer 2, wait its complete collapse rear bumper damping crossbeam 1 and bumper
Outer baffle 3 occurs bending and deformation to consume energy.Greatly increase so as to play dual cushioning effect equivalent to twice preventer
The buffering and damping effect of bumper, wherein mainly consumed by the compression and flexural deformation of pillar-cell structure layer
Energy.Arranging sine wave (or cosine wave and combinations thereof waveform) deformation guide line can make the deformation of pillar-cell structure layer consume energy
It is more fully and stable, and the amplitude of the deformation guide line that can pass through to change different wave change the peak value of bumper collision power with
Adapt to different use demands.Specifically, when waveform is sine wave y=Asinx or cosine wave y=Aconx or composite wave y=A
(conx+sinx), its amplitude A is determined that wherein P is the maximum compression strength without box body during sine wave, when F is to use by following formula
Required maximum compression strength：
Only sine wave when：
Only cosine wave when：
When sine wave is with cosine wave composite wave：
Using ABAQUS finite element softwares there is the automobile of sine wave guiding deformation buffer structure sheaf to protect to this utility model
Dangerous thick stick is carried out as a example by shock simulation analysis, and compared with existing conventional automobile traditional insurance thick stick, illustrates this utility model
With power consumption it is stable, power consumption is fast, make full use of material plasticity deformability the characteristics of.And the volume phase of two kinds of different bumpers
Together, therefore with more comparability.On this basis, two kinds of bumpers are distinguished as whether being provided with the bionical of sine wave guiding deformation
Pillar-grid buffer structure layer.Bumper adopts material for aluminium alloy, and using C3D20R units grid, overall cell number are split
About 50000, bumper is with the velocity shock rigid plate of 70KM/h, collision time 0.01s.
Fig. 4 is the two impact kinetic energy versus time curve.From the kinetic energy curve, 1) this utility model exists
About 50% kinetic energy is just absorbed during 0.01s；And traditional insurance thick stick absorbs 18% kinetic energy in 0.01s.It means that working as car
When colliding, the half of the absorbable collision energy of this utility model, the ability of remaining half is then undertaken by vehicle energy absorption box,
Greatly alleviate the burden of vehicle energy absorption box and automobile main frame；And traditional insurance thick stick can only absorb before disabling little one
Partial collision energy, the kinetic energy of the overwhelming majority still has vehicle energy absorption box or automobile main frame to dissipate, and secondary touching has been significantly greatly increased
Hit and (because bumper and energy-absorption box can not absorb whole collision energies, absorbed remaining kinetic energy by automobile main frame and produced
Raw collision) risk.Because the impulsive force that secondary collision is produced directly will be undertaken by vehicle frame, it is caused to deform, it is serious to threaten
The safety of occupant；2) it can be seen from FEM Simulation, when collision time is 0.01s, the speed of traditional insurance thick stick
For 62.83KM/h, and bumper buffer structure of the present utility model speed this moment is 45.16KM/h.As can be seen here, tradition is protected
The energy dissipation capacity of dangerous thick stick is very weak, it is impossible to which playing substantially reduces the effect of collision rift speed.And this utility model then can be effective
The speed of collision rift is reduced, 41.5% is decreased by, even if there is high velocity impact, this utility model also can effectively reduce collision rift
Speed, so as to the burden of vehicle energy absorption box and automobile main frame is greatly reduced, effectively reduce secondary collision to vehicle and in-car
The injury that personnel bring.
In sum, the bumper is except with traditional damping crossbeam and outer baffle, also with outstanding pillar-
Grid wall endergonic structure layer, is remarkably improved the buffering energy-consumption ability of bumper.And the sine arranged on pillar-cell structure layer
Ripple (or cosine wave and combinations thereof waveform) deformation guide line can not only effectively reduce the impact force peak value of car crass moment, and
And the plastic deformation ability of material can be given full play to, energy dissipation capacity is quick and stable.Existing frequently-used bumper and energy-absorption box
It is 35~50KM/h that structure is typically only capable to tackle low speed collision, i.e. safe speed.And the bumper buffer structure and another
One patent submitted to：Bionical energy-absorption box, this surge combination is expected safe speed can be promoted to into 80~90KM/h, so as to notable
Vehicle when reducing traffic accident damages the life security of degree and occupant, great using value.Except automotive field, it is also suitable
The higher field of mechanical property requirements is buffered in Aero-Space, ship and motor-car etc., range of application is extremely extensive.
The structure bumper outer baffle, damping crossbeam and the grid layer containing thin-walled column except being made up of outward, in cavity
It is middle to clog expansion type padded coaming to further enhance shock-absorbing capacity.
The structure is still made up of bumper outer baffle, damping crossbeam and the grid layer containing thin-walled column, but is being made
When, by adjusting mould, realize that plate face becomes bent by flat, further enhance the buffer capacity and the scope of application of bumper.
Claims (8)
1. a kind of bumper buffer structure, including bumper damping crossbeam, bumper outer baffle and bumper is arranged on
Buffer structure between damping crossbeam and bumper outer baffle, it is characterised in that：The buffer structure is bionical pillar-grid knot
Structure layer, the pillar-cell structure layer by polygon grill unit grid wall and be arranged on the thin-walled column structure of cell walls intersection
Into, and the thin-walled column is prismatic waveform along the section of short transverse with grid, in grid wall and the intersection of thin-walled column
Form the deformation guide line of waveform.
2. bumper buffer structure according to claim 1, it is characterised in that：The waveform is sine wave y=
Asinx, cosine wave y=Aconx or composite wave y=A (conx+sinx), its amplitude A is determined that wherein P is without sine by following formula
The maximum compression strength of box body during ripple, F is maximum compression strength required when using, and x is the variable along sandwich layer short transverse,
Dx is the differential to x：
Only sine wave when：
Only cosine wave when：
When sine wave is with cosine wave composite wave：
3. bumper buffer structure according to claim 2, it is characterised in that：Sine wave or cosine wave deformation are set
The pillar of guide line-cell structure layer is formed by formed by integrally casting molding or machining mode.
4. the bumper buffer structure according to claim 1,2 or 3, it is characterised in that：The polygon grid list
Unit is the polygon grid such as triangle, tetragon or hexagon.
5. bumper buffer structure according to claim 1, it is characterised in that：The material selection steel of bumper, aluminum
Alloy or fibrous composite.
6. bumper buffer structure according to claim 1, it is characterised in that：Bumper damping crossbeam is little with bionical
Post-grid wall construction layer by being integrally formed, weld or binding agent is connected.
7. bumper buffer structure according to claim 1, it is characterised in that：Bionical pillar-grid wall construction layer
It is connected with bumper outer baffle by welding or binding agent.
8. bumper buffer structure according to claim 1, it is characterised in that：Bumper damping crossbeam and outer baffle
Outer surface be plane or curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621129195.0U CN206171374U (en) | 2016-10-17 | 2016-10-17 | Car bumper buffer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621129195.0U CN206171374U (en) | 2016-10-17 | 2016-10-17 | Car bumper buffer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206171374U true CN206171374U (en) | 2017-05-17 |
Family
ID=58677615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621129195.0U Expired - Fee Related CN206171374U (en) | 2016-10-17 | 2016-10-17 | Car bumper buffer structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206171374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106379263A (en) * | 2016-10-17 | 2017-02-08 | 东南大学 | Damping structure for vehicle bumper |
-
2016
- 2016-10-17 CN CN201621129195.0U patent/CN206171374U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106379263A (en) * | 2016-10-17 | 2017-02-08 | 东南大学 | Damping structure for vehicle bumper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170517 Termination date: 20211017 |
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| CF01 | Termination of patent right due to non-payment of annual fee |