CN112109652B - Automobile energy absorption box - Google Patents
Automobile energy absorption box Download PDFInfo
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- CN112109652B CN112109652B CN202011057056.2A CN202011057056A CN112109652B CN 112109652 B CN112109652 B CN 112109652B CN 202011057056 A CN202011057056 A CN 202011057056A CN 112109652 B CN112109652 B CN 112109652B
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 3
- 241000221931 Hypomyces rosellus Species 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- 239000006096 absorbing agent Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 241000239290 Araneae Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses an automobile energy absorption box, which comprises an n-shaped pipe and a first tree-shaped structure frame filled in the n-shaped pipe, wherein n is a natural number greater than 3, and the n-shaped pipe is provided with a geometric center of an n-shaped side and vertexes of n-shaped sides; the first tree-shaped structure frame takes the geometric center as a root, the tail end of the first tree-shaped structure frame is fixedly connected to the inner wall of the n-side pipe, the first tree-shaped structure frame is provided with n primary sub-numbers, and the n primary sub-numbers are respectively arranged along the direction from the geometric center to n vertexes; the first tree structure frame is made of a sandwich composite board, the sandwich composite board comprises a water-drop-shaped middle layer, and a composite wave board and an aluminum board are respectively laminated on two sides of the water-drop-shaped middle layer from inside to outside in sequence. It has the following advantages: the tree structure frame in the automobile energy absorber box can meet the crashworthiness requirements of different vehicles, and achieves customization, light weight and simplification.
Description
Technical Field
The invention relates to the technical field of vehicle light protection and energy absorption, in particular to an automobile energy absorption box.
Background
In recent years, as the amount of automobile maintenance continues to increase throughout the years and the performance of automobiles increases at a higher speed, urban traffic and the environment are increasingly deteriorated, the road conditions for driving are complicated, and the number of traffic accidents caused by automobiles increases year by year. In an automobile collision accident, an automobile energy absorption box made of a thin-wall structure plays a key role in the automobile energy absorption box, and kinetic energy of collision is converted into structural plastic deformation energy. The light weight design of the current automobile energy-absorbing box is mainly concentrated on a specific structure, although the automobile energy-absorbing box is obviously promoted, the automobile energy-absorbing box is not suitable for all vehicles, and a novel energy-absorbing box is lacking so as to meet various requirements of different vehicles, and the automobile energy-absorbing box has excellent crashworthiness and light weight and simple manufacturing process flow.
Disclosure of Invention
The invention provides an automobile energy absorption box, which overcomes the defects of the automobile energy absorption box in the background technology.
The technical scheme adopted for solving the technical problems is as follows: the automobile energy absorption box comprises an n-shaped pipe and a first tree-shaped structural frame filled in the n-shaped pipe, wherein n is a natural number larger than 3, and the n-shaped pipe is provided with a geometric center of an n-shaped shape and vertexes of n-shaped shapes; the first tree-shaped structure frame takes the geometric center as a root, the tail end of the first tree-shaped structure frame is fixedly connected to the inner wall of the n-side pipe, the first tree-shaped structure frame is provided with n primary sub-numbers, and the n primary sub-numbers are respectively arranged along the direction from the geometric center to n vertexes; the first tree structure frame is made of a sandwich composite board, the sandwich composite board comprises a water-drop-shaped middle layer, and a composite wave board and an aluminum board are respectively laminated on two sides of the water-drop-shaped middle layer from inside to outside in sequence.
In one embodiment: two sandwich composite boards fixedly connected with each other in the first tree structure frame: the two sandwich composite boards are fixedly connected through the water-drop-shaped middle layer in the fixedly connected two sandwich composite boards.
In one embodiment: the aluminum sheet layer encases the water-drop shaped intermediate layer and the composite corrugated sheet.
In one embodiment: the composite wave plate comprises a composite plate formed by mixing and weaving titanium alloy and carbon fibers in a cobweb shape, and a plurality of pits arranged in a dot matrix are formed on the composite plate in a stamping mode.
In one embodiment: the water-drop-shaped middle layer comprises a plurality of water-drop-shaped units which are in a three-dimensional hollow structure, and the water-drop-shaped units are mutually staggered and overlapped and fixedly connected to form the water-drop-shaped middle layer.
In one embodiment: the water drop-shaped units are of a three-dimensional hollow structure with upper sharp parts and lower round parts, and a net rack or a second tree structure frame is filled in the three-dimensional hollow structure of the water drop-shaped units.
Compared with the background technology, the technical proposal has the following advantages:
The tree structure frame in the automobile energy absorber box can meet the crashworthiness requirements of different vehicles, and achieves customization, light weight and simplification. The tree-shaped unique fractal mode of the tree-shaped structure frame enables the structure to have excellent crashworthiness, the internal space of the original N-shaped pipe structure is fully utilized, the internal space is expanded from inside to outside, the collision stability of the structure is improved, the deformation mode is optimized, and the energy absorption effect is further improved.
The sandwich composite board comprises a water drop-shaped middle layer, a composite wave plate and an aluminum plate from inside to outside, so that the advantages of different structures and materials in mechanical properties can be fully exerted, the mechanical properties of the structure are optimized, the structure is gradually dense, and the energy absorption effect of the structure is further improved. .
The water drop-shaped middle layer comprises a plurality of water drop-shaped units, so that the comprehensive crashworthiness of the structure is improved, and the weight reduction is realized. The water drop-shaped units are in upper sharp and lower round structures, net racks or second tree-shaped structure frames are filled in the water drop-shaped units, and the structural characteristics of the upper conical lower balls enable the structure to withstand more mechanical impact responses, optimize deformation modes and improve deformation stability during collision.
Drawings
The invention is further described below with reference to the drawings and the detailed description.
FIG. 1 is a cross-sectional design flow diagram of a tree structure of a first tree structure frame of an embodiment;
fig. 2-1 is a schematic structural view of an automobile crash box according to a first embodiment.
Fig. 2-2 is a schematic structural view of an automobile crash box according to a second embodiment.
Fig. 2-3 are schematic structural views of an automobile crash box according to a third embodiment.
FIG. 3 is an exploded perspective view of a sandwich composite panel of an embodiment.
Fig. 4-1 is a schematic perspective view of a composite wave plate according to an embodiment.
Fig. 4-2 is one of schematic structural views of the composite wave plate according to the embodiment.
Fig. 4-3 are second schematic structural views of the composite wave plate according to the embodiment.
FIG. 5-1 is a schematic cross-sectional view of a water droplet-like unit according to the embodiment.
Fig. 5-2 is a schematic structural diagram of two adjacent sandwich composite plates fixedly connected in accordance with the embodiment.
Detailed Description
Referring to fig. 1 to 3, the automobile energy absorber box comprises an N-shaped pipe M and a first tree-shaped structure frame N filled in the N-shaped pipe; the n is a natural number greater than 3, and the n-sided tube is a regular prism-shaped tube, for example, the n-sided tube has a geometric center 10 of an n-sided shape and vertexes 11 of n-sided shapes; the first tree structure frame takes the geometric center 10 as a root, the tail end of the first tree structure frame is fixedly connected to the inner wall of the n-side pipe, the first tree structure frame is provided with n primary sub-numbers, and the n primary sub-numbers are respectively arranged along the direction from the geometric center 10 to the n vertexes 11. The first tree structure is made of a sandwich composite plate 20 comprising a drop-shaped middle layer 23, two sides of which are laminated with a composite corrugated plate 22 and an aluminum sheet 21 in sequence from inside to outside.
Referring to fig. 1, fig. 1 is a cross-sectional design flow chart of a first tree structure frame. The geometric center 10 radiates n primary line segments outwards, the n primary line segments start from the geometric center 10 and are respectively connected with n vertexes 1 1, and the length of each primary line segment generated by the geometric center is l 1; taking a point on the primary line segment as a primary bifurcation point, wherein the primary bifurcation point to the geometric center 10 forms a primary sub-number, and the lengths of the primary sub-number are l 2,l1 and l 2, which have the following relationship:
l2＝a1·l1
Here a 1 represents the specific gravity of the first order sub-number length to the first order line segment l 1. Meanwhile, the primary sub-number is branched into two secondary line segments, the length of each secondary line segment is l 3, the included angle between the two secondary line segments is theta, the two secondary line segments are named as a branching angle, and the branching angle theta can be obtained through the following formula:
The branched secondary line segment is connected with the inner wall of the pipe, one point, namely a secondary branch point, is taken on the secondary line segment, the secondary branch point and the primary branch point form a secondary sub-number, the secondary branch point and the inner wall of the pipe form a tertiary line segment, and the lengths of the tertiary line segment are l 4,l3 and l 4, and the lengths of the tertiary line segment have the following relation:
l4＝a2·l3
Here, a 2 represents the proportion of the third-level line segment to the second-level line segment, and the bifurcation angle of the third-level sub-number is the same as the bifurcation angle of the second-level sub-number. The following processes are all designed in such a way that for the x-th level, a point is taken on the x-1-th level line segment, whereby the truncated length l s of the x-1-th level line segment and its initial length l t can be expressed as:
ls＝ax·lt
Here a x represents the specific gravity of the x-1 level line segment to the x level line segment, and at the same time, the bifurcation angle is θ. The tree structure frame in the specific embodiment is suitable for various outer tube shapes (arbitrary n-sided shapes), and the number of the separation points (the number of the tree-shaped fractal stages x) and the positions of the separation points (the bifurcation point positions a x) can be drawn according to the actual vehicle or road condition requirements, so that different crashworthiness under different requirements can be achieved, and the aim of customization can be achieved.
In this embodiment, the cross section of the n-shaped tube is triangle, quadrangle, pentagon, triangle, quadrangle, pentagon forms the first, second and third examples respectively, and their structure diagrams are as shown in fig. 2-1, fig. 2-2 and fig. 2-3, and the crash box of the automobile can provide the extremely large crash performance in a specific direction.
The aluminum sheet 21 is laminated and wrapped with the water-drop-shaped middle layer 23 and the composite wave plate 22, and the aluminum sheet 21 wrapped with the periphery can improve the integrity and ductility of the structure and prevent the invasion of pollutants such as oil stains, particles and the like from affecting the crashworthiness of the structure.
Referring to fig. 4-1 to 4-3, the composite wave plate includes a composite plate formed by cross-knitting titanium alloy 222 and carbon fibers 223 in a web shape, and a plurality of arc-shaped pits 221 arranged in a lattice shape are punched and formed on the composite plate. The lattice-like arrangement of the plurality of arc-like pits 221 can enhance the strength of the structure and improve the deformation mode at the time of collision, and adapt the water-drop-like units of the intermediate layer to play a relatively fixed role. The titanium alloy 222 and the carbon fiber 0123 are lapped and woven with each other in a spider web mode by taking the center of each periodic arc as a divergence point, and a multi-layer staggered weaving mode is adopted, namely, the wave plate structure is formed by combining a plurality of layers of staggered spider web structures, so that excellent mechanical properties such as high strength, high toughness and the like of the titanium alloy and the carbon fiber can be furthest exerted.
Referring to fig. 5-1 and 5-2, the water-drop shaped middle layer 23 includes a plurality of water-drop shaped units 231 having a three-dimensional hollow structure, the plurality of water-drop shaped units 231 are arranged in a plurality of matrixes, each matrix includes a plurality of rows, each row includes a plurality of water-drop shaped units 231, the plurality of water-drop shaped units 231 of the matrix are aligned in direction, and the plurality of water-drop shaped units 231 are arranged in a plurality of matrixes to form the water-drop shaped middle layer by being staggered and overlapped with each other. The drop-shaped unit 231 has an upper sharp and lower round structure, the radii of the upper round angle and the lower round angle are R and R respectively, the thickness is t, the total structure length c, the drop-shaped unit 231 is filled with a bottom groove 233 as an initial point, and a second tree structure frame 232 is filled in the drop-shaped unit, and the layout mode of the second tree structure frame is similar to that of the tree structure frame method. The unique configuration of the structure can play a good role in buffering in the collision process, and light weight is realized. Between the drop-shaped units 231, the vertical positioning is realized between the bottom groove 233 and the small round corner at the top, and the positioning between the same-row structures is realized through the composite wave plates, so that more kinetic energy can be absorbed in the collision process. Two sandwich composite boards fixedly connected with each other in the first tree structure frame: the fixation of the two sandwich composite plates is achieved by the water drop-shaped unit 231 fixedly connecting the water drop-shaped middle layers in the two sandwich composite plates. The unique appearance of water droplet form unit 231 also can realize connection, the fixed between the sandwich composite sheet, makes the assembly process of structure simple and easy, can adapt to different operational environment, and is closely connected between the sandwich composite sheet, can realize the stability of structure under the condition of not adding any adhesive.
The automobile energy absorption box further comprises an energy absorption seat, and the n-shaped pipe is arranged on the outer wall of the energy absorption seat. The n-shaped pipe forms a tree cell structural member, a series of smaller tree cell structural members are produced through manufacturing, the tree cell structural members are arranged on each surface of the energy absorbing seat, and a plurality of tree cell structural members can be combined into different structural styles, so that the requirements of structures in different directions on crashworthiness can be met. The structure is gradually compact from inside to outside no matter what type is, so that the collision stability in the collision process is ensured, and the anti-collision device has more excellent anti-collision performance.
The tree structure frame fully utilizes the bionics principle to apply to the protection energy-absorbing field of the automobile so as to improve the crashworthiness of the automobile energy-absorbing box, protect the passenger cabin, have the least damage during collision, be applicable to various outer tube shapes, and can be used for planning the number of separation points and the positions of the separation points according to the actual vehicle or road condition requirements, so that a polygonal column or a combinable cell structure can be manufactured, different crashworthiness under different requirements can be achieved, and the aim of customization is fulfilled. In terms of manufacturing, the tree-shaped fractal structure is simple, the sandwich structure with the water-drop-shaped units inside is easy to assemble, and the water-drop-shaped units can be printed by 3D.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and therefore should not be taken as limiting the scope of the invention, for all changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein.
Claims (1)
1. Automobile energy-absorbing box, its characterized in that: the device comprises an n-shaped pipe and a first tree-shaped structure frame filled in the n-shaped pipe, wherein n is a natural number larger than 3, the n-shaped pipe is a regular prism-shaped pipe and is provided with a geometric center of an n-shape and vertexes of the n-shapes; the first tree-shaped structure frame takes the geometric center as a root, the tail end of the first tree-shaped structure frame is fixedly connected to the inner wall of the n-side pipe, the first tree-shaped structure frame is provided with n primary sub-numbers, and the n primary sub-numbers are respectively arranged along the direction from the geometric center to n vertexes; the first tree structure frame is made of a sandwich composite board, the sandwich composite board comprises a water-drop-shaped middle layer, and a composite wave board and an aluminum board are respectively laminated on two sides of the water-drop-shaped middle layer from inside to outside in sequence;
The geometric center radiates n primary line segments outwards, the n primary line segments start from the geometric center and are respectively connected with n vertexes 1 1, and the length of each primary line segment generated by the geometric center is l 1; taking a point on the primary line segment as a primary bifurcation point, wherein the primary bifurcation point to the geometric center forms a primary sub-number, and the lengths of the primary bifurcation point and the primary sub-number are l 2,l 1 and l 2, which have the following relation:
l2＝a1·l1
where a 1 represents the specific gravity of the primary sub-number length to the primary segment l 1; meanwhile, the primary sub-number is branched into two secondary line segments, the length of each secondary line segment is l 3, the included angle between the two secondary line segments is theta, the two secondary line segments are named as a branching angle, and the branching angle theta is obtained by calculating the following formula:
The branched secondary line segment is connected with the inner wall of the pipe, one point, namely a secondary branch point, is taken on the secondary line segment, the secondary branch point and the primary branch point form a secondary sub-number, the secondary branch point and the inner wall of the pipe form a tertiary line segment, and the lengths of the tertiary line segment are l 4,l 3 and l 4, and the lengths of the tertiary line segment have the following relation:
l4＝a2·l3
Here, a 2 represents the proportion of the third-level line segment to the second-level line segment, and the bifurcation angle of the third-level sub-number is the same as the bifurcation angle of the second-level sub-number; the following processes are all designed in such a way that for the x-th level, a point is taken on the x-1-th level line segment, whereby the truncated length l s of the x-1-th level line segment and its initial length l t can be expressed as:
ls＝ax·lt
Here a x represents the proportion of the x-1 level line segment to the x level line segment, and meanwhile, the bifurcation angles are all theta;
Two sandwich composite boards fixedly connected with each other in the first tree structure frame: the two sandwich composite boards are fixedly connected through the water-drop-shaped middle layer in the fixedly connected two sandwich composite boards;
The aluminum plate layer is wrapped by the water-drop-shaped middle layer and the composite wave plate; the composite wave plate comprises a composite plate formed by mixing and weaving titanium alloy and carbon fibers in a cobweb shape, wherein a plurality of pits arranged in a dot matrix are formed on the composite plate in a punching mode; the water drop-shaped middle layer comprises a plurality of water drop-shaped units which are in a three-dimensional hollow structure, the water drop-shaped units are arranged into a plurality of matrixes, each matrix comprises a plurality of rows, each row comprises a plurality of water drop-shaped units, the water drop-shaped units of the matrixes are aligned in the direction, and the water drop-shaped units of the matrixes are arranged in a staggered and overlapped mode and are fixedly connected with each other to form the water drop-shaped middle layer; the water drop-shaped units are of a three-dimensional hollow structure with a pointed upper part and a round lower part, and a net rack or a second tree structure frame is filled in the three-dimensional hollow structure of the water drop-shaped units;
the energy absorption seat is characterized by further comprising an energy absorption seat, and the n-shaped pipe is arranged on the outer wall of the energy absorption seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011057056.2A CN112109652B (en) | 2020-09-29 | 2020-09-29 | Automobile energy absorption box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011057056.2A CN112109652B (en) | 2020-09-29 | 2020-09-29 | Automobile energy absorption box |
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| CN112109652A CN112109652A (en) | 2020-12-22 |
| CN112109652B true CN112109652B (en) | 2024-06-07 |
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| CN114880791B (en) * | 2022-04-13 | 2023-11-03 | 汕头大学 | Chiral multicellular structure unit, assembly and intelligent construction method |
| CN117565809B (en) * | 2024-01-12 | 2024-04-30 | 广东粤港澳大湾区黄埔材料研究院 | Composite material energy-absorbing box and anti-collision beam assembly |
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2020
- 2020-09-29 CN CN202011057056.2A patent/CN112109652B/en active Active
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