CN207943010U - A kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient - Google Patents
A kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient Download PDFInfo
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- CN207943010U CN207943010U CN201820050669.5U CN201820050669U CN207943010U CN 207943010 U CN207943010 U CN 207943010U CN 201820050669 U CN201820050669 U CN 201820050669U CN 207943010 U CN207943010 U CN 207943010U
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Abstract
The utility model discloses a kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient, which is made of box body, bottom plate, preceding connecting plate, rear connecting plate, energy-absorbing inner core；Energy-absorbing inner core by the three-dimensional negative poisson's ratio structure composition of three layers of different-thickness, by the identical negative poisson's ratio basic cell array of a large amount of shape sizes arranged by every layer of three-dimensional negative poisson's ratio structure, and energy-absorbing inner core is used to absorb energy when automobile collides；The box body and bottom plate of energy-absorption box complement each other to form the internal shell with cavity, and energy-absorbing inner core is fixed on wherein；Energy-absorption box is whole hexagonal with the cavity cross section of bottom plate composition；Energy-absorption box surface is arranged multiple tracks and induces slot and crumple hole, for guiding energy-absorption box that steady-state deformation occurs；The utility model can be effectively improved the energy-absorbing effect of energy-absorption box, improve the passive security performance of vehicle.
Description
Technical field
The utility model is related to vehicle passive safeties to protect field, and in particular to a kind of negative Poisson of the three-dimensional of positive thickness gradient
Than construction car energy-absorption box.
Background technology
In recent years, with the fast development of auto industry, automobile have been developed as in people's life and work can not or
The scarce vehicles.However automobile is while the economic development of go off daily and its people to people brings great convenience
Many safety problems are brought, since the annual output of automobile vendor and car ownership increase rapidly so that daily life
The quantity of traffic accident also constantly rises in work, and serious harm is brought to the safety of life and property of the mankind.According to statistics,
In most traffic accident, it can all be related to the head-on crash of automobile, and the bumper assembly of automobile exists in head-on crash
It is played an important role in the passive security of vehicle.Energy-absorption box is as energy absorbing component important in bumper system for vehicles, installation
Between bumper bar crossbeam and longitudinal beam, on the one hand it absorbs the energy that crossbeam transmits to the maximum extent, and then reduces and touch
The damage to vehicle foreside component and protection passenger safety are hit, is on the other hand that impact force is passed into longeron and is disperseed.
Current common energy-absorption box shape is square structure, some foamed aluminiums or honeycomb energy absorbing structure are filled in inside, this
There is deformation when automobile collides and be not sufficiently stable, compress not thorough enough in energy-absorption box, collide to vehicle to reduce
The assimilation effect of Shi Nengliang is unable to maximum possible and is protected to occupant.
Utility model content
Technical problem to be solved in the utility model is to provide one kind just for defect involved in background technology
The three-dimensional negative poisson's ratio construction car energy-absorption box of thickness gradient.
The utility model uses following technical scheme to solve above-mentioned technical problem：
A kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient, including preceding connecting plate, box body, rear connecting plate
With energy-absorbing inner core；
By the energy-absorbing inner core comprising in being fixed on, both ends are connected with preceding connecting plate, rear connecting plate the box body respectively；
From preceding connecting plate, connecting plate direction includes the first, second, third negative poisson's ratio structure to the energy-absorbing inner core backward；
The first, second, third negative poisson's ratio structure is formed by negative poisson's ratio unit cell array；
The negative poisson's ratio unit cell includes two indent hexagonal structures, and the indent hexagonal structure includes two parallel
Bottom edge and four indents bevel edge, two bottom edges of an indent hexagonal structure respectively wherein point it is corresponding and another in
Two bottom edges of recessed hexagonal structure intersect vertically at midpoint so that the plane where two indent hexagonal structures is vertical；
The wall thickness of the negative poisson's ratio unit cell of the first, second, third negative poisson's ratio structure is sequentially increased.
Three-dimensional negative poisson's ratio construction car energy-absorption box as a kind of positive thickness gradient of the utility model further optimizes
The wall thickness of scheme, the negative poisson's ratio unit cell of the first negative poisson's ratio structure ist1=0.7mm, the second negative poisson's ratio structure are born
The wall thickness of Poisson's ratio unit cell ist2The wall thickness of=1.1mm, the negative poisson's ratio unit cell of third negative poisson's ratio structure ist3=1.5mm。
Three-dimensional negative poisson's ratio construction car energy-absorption box as a kind of positive thickness gradient of the utility model further optimizes
Scheme, the length on the bottom edge of two indent hexagonal structures of the negative poisson's ratio unit cella=11mm, two bottom edges vertical rangel
=13mm, bottom edge and adjacent bevel edge angleθ=60 °, the length of bevel edgec=8.5mm, bevel edge and the width on bottom edgeb=3mm。
Three-dimensional negative poisson's ratio construction car energy-absorption box as a kind of positive thickness gradient of the utility model further optimizes
Scheme, the cross section of connecting plate is the hexagon comprising two parallel bottom edges and four bevel edges, the cross before the box body is parallel to
The length on the section bottom edges Liang Tiaox=121mm, four bevel edges length bey=42mm, bottom edge and the angle of adjacent bevel edge ared=
Height between 115 °, two bottom edgesh=82mm。
Three-dimensional negative poisson's ratio construction car energy-absorption box as a kind of positive thickness gradient of the utility model further optimizes
Scheme, the box body is vertical with the preceding connecting plate, rear connecting plate respectively, and the preceding connecting plate is between the rear connecting plate
Distance be 219mm；
Set on the box surface there are one crumple hole and parallel with the preceding connecting plate first to third induce slot,
Wherein：
It is 79mm that the distance between preceding connecting plate, which is arranged on the upper surface of the box body, in the first induction slot；
It is 144mm that the second induction slot, third, which induce slot, crumple hole to be arranged at the box body apart from preceding connecting plate,
Place；
The crumple hole is arranged on the upper surface of the box body, and the second induction slot, third induce slot about described
Crumple hole is symmetrical, is extended on the upper surface of the box body on the inclined-plane of cassette upper end face both sides respectively.
Three-dimensional negative poisson's ratio construction car energy-absorption box as a kind of positive thickness gradient of the utility model further optimizes
Scheme, described first to third induction slot depth is 3mm.
Three-dimensional negative poisson's ratio construction car energy-absorption box as a kind of positive thickness gradient of the utility model further optimizes
Scheme, the box body are equipped with four, the fiveth induction slots parallel with the rear connecting plate on lower face；
4th induction the distance between the slot and rear connecting plate are 15mm；
5th induction the distance between slot and rear the connecting plate 130mm.
Three-dimensional negative poisson's ratio construction car energy-absorption box as a kind of positive thickness gradient of the utility model further optimizes
The depth of scheme, the four, the 5th inductions slot is 4mm.
The utility model has the following technical effects using above technical scheme is compared with the prior art：
The prior art is compared, the energy-absorption box combination negative poisson's ratio structural material and functionally graded material in the utility model
Advantage, efficiently solves current energy-absorption box existing deformation is unstable when vehicle collides, energy-absorbing effect is poor etc. and lack
Point effectively improves the passive security performance of vehicle.
Description of the drawings
Fig. 1 is a kind of three-dimensional negative poisson's ratio construction car energy-absorption box for positive thickness gradient that the utility model embodiment provides
Schematic diagram；
Fig. 2 is the energy-absorbing inner core schematic diagram that the utility model embodiment provides；
Fig. 3 is the negative poisson's ratio unit cell schematic diagram that the utility model embodiment provides；
Fig. 4 is the indent hexagonal structure schematic diagram that the utility model embodiment provides；
Fig. 5 is the energy-absorption box schematic cross-section that the utility model embodiment provides；
Fig. 6 is the cassette upper end face induction slot and crumple hole site schematic diagram that the utility model embodiment provides；
Fig. 7 is the box body lower face induction groove location schematic diagram that the utility model embodiment provides；
In figure, connecting plate before 1-, 2- box bodys, connecting plate after 3-, 4- energy-absorbing inner cores, the bottom plate of 5- box bodys, 6- first induces
Slot, 7- second induce slot, 8- crumples hole, 9- thirds to induce slot, 10- the 4th that slot, 11- the 5th is induced to induce slot.
Specific implementation mode
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings：
The utility model can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.
On the contrary, thesing embodiments are provided so that the disclosure is thorough and complete, and this reality will be given full expression to those skilled in the art
With novel range.In the accompanying drawings, for the sake of clarity it is exaggerated component.
As shown in Figure 1, the utility model discloses a kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient,
Including box body, preceding connecting plate, rear connecting plate and energy-absorbing inner core, box body is by energy-absorbing inner core comprising in being fixed on, and both ends are respectively with before
Connecting plate, rear connecting plate are connected.
As shown in Fig. 2, energy-absorbing inner core is from preceding connecting plate, connecting plate direction includes the first, second, third negative poisson's ratio backward
Structure；First, second, third negative poisson's ratio structure is formed by negative poisson's ratio unit cell array.
As shown in figure 3, negative poisson's ratio unit cell includes two indent hexagonal structures, indent hexagonal structure includes two flat
Distinguish point correspondence wherein and another in two bottom edges of the bevel edge on capable bottom edge and four indents, an indent hexagonal structure
Two bottom edges of indent hexagonal structure intersect vertically at midpoint so that the plane where two indent hexagonal structures is vertical.
The wall thickness of the negative poisson's ratio unit cell of first, second, third negative poisson's ratio structure is sequentially increased.
The wall thickness of the negative poisson's ratio unit cell of first negative poisson's ratio structure ist1=0.7mm, the negative pool of the second negative poisson's ratio structure
Pine is than the wall thickness of unit cellt2The wall thickness of=1.1mm, the negative poisson's ratio unit cell of third negative poisson's ratio structure ist3=1.5mm。
As shown in figure 4, the characteristic parameter of two indent hexagonal structures of negative poisson's ratio unit cell is respectively：Bottom edge length isaThe vertical range of=11mm, two bottom edges isl=13mm, bottom edge and the angle of adjacent bevel edge areθ=60 °, the length of four bevel edges is equal
ForcThe width of=8.5mm, four bevel edges and bottom plate is b=3mm.
As shown in figure 5, the cross section that box body is parallel to preceding connecting plate is to include the six of two parallel bottom edges and four bevel edges
Side shape, two bottom edge length of the cross sectionx=121mm, four the length of the hypotenuse arey=42mm, the folder on bottom edge and adjacent bevel edge
Angle isd=115°；Height between two bottom edgesh=82mm。
As shown in fig. 6, the box body is vertical with the preceding connecting plate, rear connecting plate respectively, and the preceding connecting plate is to institute
It is 219mm to state the distance between rear connecting plate；It is provided with three induction slots and a crumple hole on cassette upper end face, induces slot
Depth is 3mm, and the first induction groove location is at preceding connecting plate 79mm, the second induction slot, third induction slot and crumple hole
Positional distance before connecting plate be 144mm；Second induction slot, third induction slot are symmetrical about the crumple hole, respectively in institute
It states and is extended on the upper surface of box body on the inclined-plane of cassette upper end face both sides.
As shown in fig. 7, box body lower face is equipped with the four, the 5th induction slots, the depth of the four, the 5th induction slots is
4mm, for the 4th induction groove location apart from rear connecting plate 15mm, distance of the 5th induction groove location apart from rear connecting plate is 130mm.
Those skilled in the art of the present technique are it is understood that unless otherwise defined, all terms used herein（Including skill
Art term and scientific terminology）With meaning identical with the general understanding of the those of ordinary skill in the utility model fields
Justice.It should also be understood that those terms such as defined in the general dictionary should be understood that with upper with the prior art
The consistent meaning of meaning hereinafter, and unless defined as here, will not with the meaning of idealization or too formal come
It explains.
Above-described specific implementation mode, to the purpose of this utility model, technical solution and advantageous effect carried out into
One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
The utility model processed, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done,
It should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient, which is characterized in that including preceding connecting plate, box
Body, rear connecting plate and energy-absorbing inner core；
By the energy-absorbing inner core comprising in being fixed on, both ends are connected with preceding connecting plate, rear connecting plate the box body respectively；
From preceding connecting plate, connecting plate direction includes the first, second, third negative poisson's ratio structure to the energy-absorbing inner core backward；
The first, second, third negative poisson's ratio structure is formed by negative poisson's ratio unit cell array；
The negative poisson's ratio unit cell includes two indent hexagonal structures, and the indent hexagonal structure includes two parallel bottoms
The bevel edge on side and four indents, point corresponds to and another indent six wherein respectively on two bottom edges of an indent hexagonal structure
Two bottom edges of side shape structure intersect vertically at midpoint so that the plane where two indent hexagonal structures is vertical；
The wall thickness of the negative poisson's ratio unit cell of the first, second, third negative poisson's ratio structure is sequentially increased.
2. the three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient according to claim 1, which is characterized in that institute
The wall thickness for stating the negative poisson's ratio unit cell of the first negative poisson's ratio structure ist1=0.7mm, the negative poisson's ratio list of the second negative poisson's ratio structure
The wall thickness of born of the same parents ist2The wall thickness of=1.1mm, the negative poisson's ratio unit cell of third negative poisson's ratio structure ist3=1.5mm。
3. the three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient according to claim 1, which is characterized in that institute
State the length on the bottom edge of two indent hexagonal structures of negative poisson's ratio unit cella=11mm, two bottom edges vertical rangel=13mm、
The angle on bottom edge and adjacent bevel edgeθ=60 °, the length of bevel edgec=8.5mm, bevel edge and the width on bottom edgeb=3mm。
4. the three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient according to claim 1, which is characterized in that institute
The cross section for stating connecting plate before box body is parallel to is the hexagon comprising two parallel bottom edges and four bevel edges, the cross section two
The length on bottom edgex=121mm, four bevel edges length bey=42mm, bottom edge and the angle of adjacent bevel edge ared=115 °, two
Height between bottom edgeh=82mm。
5. the three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient according to claim 4, which is characterized in that institute
It is vertical with the preceding connecting plate, rear connecting plate respectively to state box body, and the preceding connecting plate is the distance between to connecting plate after described
For 219mm；
Set on the box surface there are one crumple hole and parallel with the preceding connecting plate first to third induce slot,
In：
It is 79mm that the distance between preceding connecting plate, which is arranged on the upper surface of the box body, in the first induction slot；
It is at 144mm that the second induction slot, third, which induce slot, crumple hole to be arranged at the box body apart from preceding connecting plate,；
The crumple hole is arranged on the upper surface of the box body, and the second induction slot, third induce slot about the crumple
Hole is symmetrical, is extended on the upper surface of the box body on the inclined-plane of cassette upper end face both sides respectively.
6. the three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient according to claim 5, which is characterized in that institute
It is 3mm to state first and induce the depth of slot to third.
7. the three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient according to claim 5, which is characterized in that institute
It states box body and is equipped with four, the fiveth induction slots parallel with the rear connecting plate on lower face；
4th induction the distance between the slot and rear connecting plate are 15mm；
5th induction the distance between slot and rear the connecting plate 130mm.
8. the three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient according to claim 7, which is characterized in that institute
The depth for stating the four, the 5th induction slots is 4mm.
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| CN201820050669.5U CN207943010U (en) | 2018-01-12 | 2018-01-12 | A kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient |
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| CN201820050669.5U CN207943010U (en) | 2018-01-12 | 2018-01-12 | A kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108045338A (en) * | 2018-01-12 | 2018-05-18 | 南京航空航天大学 | A kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient |
| CN111361630A (en) * | 2020-03-19 | 2020-07-03 | 大连理工大学 | Automobile crumple type energy-absorbing steering column with gradient multi-cell structure |
-
2018
- 2018-01-12 CN CN201820050669.5U patent/CN207943010U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108045338A (en) * | 2018-01-12 | 2018-05-18 | 南京航空航天大学 | A kind of three-dimensional negative poisson's ratio construction car energy-absorption box of positive thickness gradient |
| CN111361630A (en) * | 2020-03-19 | 2020-07-03 | 大连理工大学 | Automobile crumple type energy-absorbing steering column with gradient multi-cell structure |
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Granted publication date: 20181009 Termination date: 20210112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |