CN110843709A - Novel sandwich structure automobile front anti-collision beam and assembly - Google Patents
Novel sandwich structure automobile front anti-collision beam and assembly Download PDFInfo
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- CN110843709A CN110843709A CN201911070997.7A CN201911070997A CN110843709A CN 110843709 A CN110843709 A CN 110843709A CN 201911070997 A CN201911070997 A CN 201911070997A CN 110843709 A CN110843709 A CN 110843709A
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- lattice structure
- automobile front
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 12
- 239000006260 foam Substances 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 241000345822 Cylindera <genus> Species 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 241000264877 Hippospongia communis Species 0.000 description 23
- 210000004027 cell Anatomy 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000006261 foam material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- B60R19/18—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
- B60R19/22—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 containing mainly cellular material, e.g. solid foam
-
- 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
- B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
- B60R2019/1866—Cellular structures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Vibration Dampers (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses a novel automobile front anti-collision beam with a sandwich structure and an assembly, wherein the anti-collision beam comprises a tubular aluminum alloy shell, aluminum foam, a two-layer lattice structure and a honeycomb structure are arranged in the shell, the honeycomb structure is filled between the two-layer lattice structure, the two-layer lattice structure comprises a first lattice structure arranged on one side far away from an automobile, and the first lattice structure comprises a plurality of structures which are mutually connectedThe first unit cell is shaped, and the aluminum foam is filled in a gap between the two layers of lattice structures and the inner wall of the shell. The invention has the advantages of absorbing impact energy, reducing impact peak force, being beneficial to realizing the light weight of the automobile and the like.
Description
Technical Field
The invention relates to a novel automobile front anti-collision beam with a sandwich structure and an assembly.
Background
In the current society, along with the rapid development of economy, automobiles become a necessary travel tool for families, the occupation of automobiles in China is increasing day by day, the frequent occurrence of traffic accidents is brought, the great influence is brought to the life and property safety of people, and besides, the emission of automobile exhaust and the consumption of energy also bring great pressure to the environment and energy in China; therefore, people have been dedicated to the field of automobile safety and the field of light weight in recent years, the field of active automobile safety tends to be perfect, and the field of passive safety is required to be perfect, wherein the passive safety field comprises an automobile energy absorption box, front and rear anti-collision beams, an air bag, an anti-side impact bar and the like; when the automobile collides, the automobile passive safety device is subjected to plastic deformation to absorb energy generated by impact, so that the life health safety of people is protected. The front anti-collision beam of the automobile is used as a first protective component for the front collision of the automobile, the energy absorption effect is of great importance, the traditional front anti-collision beam of the automobile is only made of a pure high-strength steel beam, the energy absorption and protection capabilities of the front anti-collision beam of the automobile are general when the front collision of the automobile occurs, and a good protection effect cannot be really achieved, and the whole mass of the front anti-collision beam of the automobile is large due to the high density of the high-strength steel, so that the light-weight design of the automobile cannot be realized; therefore, a novel front anti-collision beam structure which can meet the overall strength of the front anti-collision beam and can stably and efficiently absorb more impact energy when impact occurs needs to be designed, the dead weight of the front anti-collision beam structure needs to be reduced as much as possible, the weight of an automobile is reduced, emission is reduced, and light weight is realized; in recent years, light-weight and high-strength structures or materials are continuously developed by human beings, such as light-weight aluminum alloy honeycombs and lattice structures with high specific strength and specific stiffness, which have high comprehensive performance in terms of energy absorption and light weight, and the design of the front anti-collision beam structure of the automobile can be considered to obtain expected results. Therefore, the design of the novel automobile front anti-collision beam has very important practical significance and value.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a novel automobile front anti-collision beam with a sandwich structure and an assembly.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a novel crashproof roof beam before sandwich structure car which characterized in that: it includes tubulose aluminum alloy shell, inside aluminum foam, two-layer lattice structure and the honeycomb of being equipped with of shell, honeycomb fill in between the two-layer lattice structure, two-layer lattice structure includes a first lattice structure who sets up in the one side of keeping away from the car, first lattice structure includes that a plurality of interconnect's structure isThe first unit cell is shaped, and the aluminum foam is filled in a gap between the two layers of lattice structures and the inner wall of the shell.
In another preferred embodiment, the honeycomb structure comprises a plurality of first cylindrical through holes with a first regular hexagon cross section, and second cylindrical through holes with a second regular hexagon cross section are arranged in the first cylindrical through holes; six angles of the second regular hexagon are respectively superposed with the middle points of six edges of the first regular hexagon; a hollow cylinder is arranged at the middle shaft of the first through hole, and six metal plate feet connected to six corners of the second cylindrical through hole are sequentially arranged on the side surface of the hollow cylinder; the included angle between the adjacent metal plate feet is 60 degrees, and the cross section of the honeycomb structure is of a shapeAnd (4) shaping.
In another preferred embodiment, a light carbon fiber plate is respectively arranged between the honeycomb structure and the two lattice structures.
In another preferred embodiment, the two-layer lattice structure includes a second lattice structure disposed on a side close to the vehicle, the second lattice structure includes a plurality of second unit cells connected to each other, and the second unit cells are six XThe hollow parts formed by the truss rods
A hexahedron of the shape.
In another preferred embodiment, both layers of lattice structure are made of stainless steel.
In another preferred embodiment, the honeycomb structure is made of aluminum or an aluminum alloy.
In another preferred embodiment, the housing is connected to the two layers of lattice structure and the honeycomb structure by spot welding.
The utility model provides a novel crashproof assembly before sandwich structure car, it includes anticollision roof beam and gradient energy-absorbing box, gradient energy-absorbing box is inside to be equipped with to run through gradient energy-absorbing box's many nest of tubes, gradient energy-absorbing box's transversal personally submits
And (4) shaping.
In another preferred embodiment, the impact beam is rigidly connected with the gradient energy absorption box.
The invention has the beneficial effects that:
1. the aluminum alloy shell is adopted, so that the rigidity is low, the plastic deformation is easy to occur, and the impact energy is initially absorbed through a stable deformation mode when the collision occurs; then the aluminum alloy shell transmits most of energy to the internal aluminum foam material, the aluminum foam material has small density, obvious porous characteristic and good effect of absorbing high impact energy, and the impact energy is absorbed by extruding pores of the aluminum foam material, so that the impact peak force is reduced; impact energy is transmitted to the two layers of lattice structures and the honeycomb structures in the anti-collision beam, the lattice structures have good rigidity and strength, so that the anti-collision beam is high in impact resistance, and meanwhile, when the truss rods of the lattice structures collapse and break and deform, a large amount of energy can be absorbed by utilizing the porous characteristics of the lattice structures; the gradient energy absorption box is matched with the anti-collision beam, so that the impact energy from different angles of the anti-collision beam can be absorbed, the box body is internally provided with a multi-cell structure, the integral rigidity and the energy absorption effect of the energy absorption box are obviously enhanced, the gradient energy absorption box and the anti-collision beam are matched with each other, the practicability of the first protective barrier of the automobile is greatly improved, and the safety and the stability of the interior of the automobile are powerfully guaranteed.
2. The honeycomb structure improves traditional hexagonal honeycomb, helps to reduce the peak force of collision, and the formation of induced folding wave for honeycomb structure energy-absorbing process is more stable, and total energy-absorbing has also improved by a wide margin.
3. The multi-cell gradient energy absorption box can absorb impact energy in different directions by utilizing the gradient characteristic, the folding wave number is increased, the integral rigidity of the energy absorption box is enhanced by the internal multi-cell characteristic, and the stability and high-efficiency energy absorption of the energy absorption box are further improved.
4. The first lattice structure can stably and efficiently absorb a large amount of energy by depending on the position of the inner truss rod, the second lattice structure is compact, the rigidity and the strength of the anti-collision beam are guaranteed by utilizing the X-shaped truss rod, and the phenomenon that too much energy is unstably transmitted to the automobile energy absorption box to cause the local energy concentration of the energy absorption box and lose the energy absorption purpose is avoided.
5. The automobile energy-absorbing structure mainly adopts light materials such as aluminum alloy, aluminum foam and stainless steel, and the structure is mainly a porous structure, so that the relative density of the structure is reduced, the total mass is lower while the rigidity and the energy-absorbing effect of the whole structure are ensured, the burden of an automobile is reduced, and the lightweight of the automobile is facilitated.
The invention is further explained in detail with the accompanying drawings and the embodiments; however, the novel sandwich automotive front impact beam and assembly of the present invention is not limited to the embodiments.
Drawings
FIG. 1 is a schematic structural view of an impact beam in accordance with a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view of an impact beam in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a first dot matrix structure according to a preferred embodiment of the present invention;
FIG. 4 is a diagram of a first cell of a first lattice structure according to a preferred embodiment of the present invention;
FIG. 5 is a cross-sectional view of a honeycomb structure in accordance with a preferred embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a second lattice structure according to a preferred embodiment of the present invention;
FIG. 7 is a diagram of a second cell of a second lattice structure according to a preferred embodiment of the present invention;
FIG. 8 is a side view of a gradient energy absorption box according to a preferred embodiment of the present invention;
FIG. 9 is a cross-sectional view of a gradient energy absorption box according to a preferred embodiment of the invention.
Detailed Description
Example, referring to fig. 1 to 9, a novel sandwich structure front bumper assembly of the present invention comprises a bumper beam and a gradient energy absorption box 70 rigidly connected to the bumper beam, wherein the bumper beam comprises a tubular aluminum alloy outer shell 10, the outer shell 10 is internally provided with an aluminum foam 20, a two-layer lattice structure and a honeycomb structure 40 made of aluminum metal, the outer shell 10 is respectively connected with the two-layer lattice structure and the honeycomb structure 40 by spot welding, the honeycomb structure 40 is filled between the two-layer lattice structure, the two-layer lattice structure comprises a first lattice structure 30 arranged at a side far from the automobile and a second lattice structure 50 arranged at a side near the automobile, the first lattice structure 30 comprises a plurality of interconnected structures such as a first unit cell 31 of fig. 4, the second lattice structure 50 comprises a plurality of interconnected second unit cells 51, the second unit cell 51 is a hexahedron formed by six X-shaped truss rods as shown in fig. 7, the two-layer lattice structure is made of 316L stainless steel through 3D printing, the aluminum foam 20 is filled in a gap between the two-layer lattice structure and the inner wall of the shell 10, and the light carbon fiber plates 60 are respectively arranged between the honeycomb structure 40 and the two-layer lattice structure.
Referring to fig. 5, the honeycomb structure 40 includes a plurality of first cylindrical through holes having a first regular hexagon in cross section, and second cylindrical through holes having a second regular hexagon in cross section are provided in the first cylindrical through holes; six angles of the second regular hexagon are respectively superposed with the middle points of six edges of the first regular hexagon; a hollow cylinder is arranged at the middle shaft of the first through hole, and six metal plate feet connected to six corners of the second cylindrical through hole are sequentially arranged on the side surface of the hollow cylinder; the included angle between the adjacent metal plate feet is 60 degrees.
Referring to fig. 8 and 9, the gradient energy absorption box 70 comprises a hollow regular quadrangular frustum pyramid and a multi-cell tube 71, wherein the multi-cell tube 71 comprises a hollow cuboid with a square bottom surface, which is arranged on the central axis of the regular quadrangular frustum pyramid; the section of the quadrangular frustum pyramid on the same cross section is a first square, the section of the cuboid is a second square, and the diagonal lines of the second square are respectively vertical to two groups of opposite sides of the second square; each side edge of the cuboid is provided with two trapezoidal metal plate feet which are respectively used for connecting two side edges of the regular quadrangular frustum with the side edges of the cuboid adjacent to each other.
In the embodiment, the gap between the two lattice structures and the aluminum alloy shell 10 is filled with the aluminum foam 20 material which has metal and bubble characteristics, has small density which is only 0.1-0.4 times of metal aluminum, has strong impact absorption capacity, sound insulation, noise reduction and corrosion resistance, can be used as a buffer material, filters the impact on the aluminum alloy shell 10, and then transmits the impact to the two lattice structures inside, so as to avoid the premature failure of the two lattice structures or the honeycomb structure 40 due to overlarge peak force and the loss of energy absorption function, further protect the internal structure from being damaged by utilizing the corrosion resistance of the material, a layer of light carbon fiber plate 60 is arranged between the two lattice structures and the honeycomb structure 40 inside the anti-collision beam, and the stability of energy transmission between the layers is ensured by the characteristics of high tensile strength and strong impact resistance of the light carbon fiber plate, the structural principle of the honeycomb structure 40 is mainly improved from an original hexagonal honeycomb to be conductive to reducing the peak collision force, the formation of the induced folding wave ensures that the energy absorption process of the honeycomb structure 40 is more stable, the total energy absorption is also greatly improved, meanwhile, the energy stable transition between two layers of lattice structures can be ensured by virtue of the good ductility and plastic deformation capability of aluminum materials, the energy absorption box matched with the anti-collision beam adopts a gradient design, a plurality of cell tubes 71 are arranged inside the energy absorption box, the energy absorption capability of the tubes is enhanced by the cooperation of cell walls, the gradient design well responds to impacts in different directions, the energy transmitted by the anti-collision beam is absorbed as much as possible, and the safety and stability in an automobile are ensured.
The above embodiments are only used to further illustrate the novel sandwich structure automobile front impact beam and assembly of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a novel crashproof roof beam before sandwich structure car which characterized in that: it includes tubulose aluminum alloy shell, inside aluminum foam, two-layer lattice structure and the honeycomb of being equipped with of shell, honeycomb fill in between the two-layer lattice structure, two-layer lattice structure includes a first lattice structure who sets up in the one side of keeping away from the car, first lattice structure includes that a plurality of interconnect's structure is
The first unit cell is shaped, and the aluminum foam is filled in a gap between the two layers of lattice structures and the inner wall of the shell.
2. The novel sandwich structure automobile front anti-collision beam is characterized in that: the honeycomb structure comprises a plurality of first cylindrical through holes with first regular hexagons in cross sections, and second cylindrical through holes with second regular hexagons in cross sections are arranged in the first cylindrical through holes; six angles of the second regular hexagon are respectively superposed with the middle points of six edges of the first regular hexagon; a hollow cylinder is arranged at the middle shaft of the first through hole, and six corners connected to the second cylindrical through hole are sequentially arranged on the side surface of the hollow cylinderA metal plate leg; the included angle between the adjacent metal plate feet is 60 degrees, and the cross section of the honeycomb structure is of a shape
And (4) shaping.
3. The novel sandwich structure automobile front anti-collision beam is characterized in that: and a light carbon fiber plate is respectively arranged between the honeycomb structure and the two layers of lattice structures.
4. The novel sandwich structure automobile front anti-collision beam is characterized in that: the two-layer lattice structure comprises a second lattice structure arranged on one side close to the automobile, the second lattice structure comprises a plurality of second unit cells connected with each other, and the second unit cells are hollow parts formed by six X-shaped truss rodsA hexahedron of the shape.
5. The novel sandwich structure automobile front anti-collision beam is characterized in that: the two layers of lattice structures are both made of stainless steel.
6. The novel sandwich structure automobile front anti-collision beam is characterized in that: the honeycomb structure is made of aluminum or an aluminum alloy.
7. The novel sandwich structure automobile front anti-collision beam is characterized in that: the shell is respectively connected with the two layers of lattice structures and the honeycomb structure through spot welding.
8. The utility model provides a novel crashproof assembly before sandwich structure car which characterized in that: comprising an impact beam according to any one of claims 1 to 7 and a gradient energy absorption box, said impact beamThe gradient energy absorption box is internally provided with a plurality of cell tubes which penetrate through the gradient energy absorption box, and the cross section of the gradient energy absorption box is shaped asAnd (4) shaping.
9. The novel sandwich structure automobile front anti-collision assembly according to claim 8, is characterized in that: the anti-collision beam is rigidly connected with the gradient energy absorption box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070997.7A CN110843709A (en) | 2019-11-05 | 2019-11-05 | Novel sandwich structure automobile front anti-collision beam and assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070997.7A CN110843709A (en) | 2019-11-05 | 2019-11-05 | Novel sandwich structure automobile front anti-collision beam and assembly |
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| CN110843709A true CN110843709A (en) | 2020-02-28 |
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| CN201911070997.7A Pending CN110843709A (en) | 2019-11-05 | 2019-11-05 | Novel sandwich structure automobile front anti-collision beam and assembly |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509161A (en) * | 2020-06-15 | 2020-08-07 | 华北电力大学（保定） | Anti-collision temperature control integrated battery module structure, processing device and method |
| CN111559333A (en) * | 2020-05-28 | 2020-08-21 | 上海理工大学 | Collision-resistant front bumper anti-collision cross beam |
| CN112406756A (en) * | 2020-12-01 | 2021-02-26 | 大连理工大学 | Anticollision roof beam assembly based on jump single cell structure of bullet |
| CN114000415A (en) * | 2021-12-13 | 2022-02-01 | 江苏宏远科技工程有限公司 | Multistage layered anti-collision device |
| CN114151487A (en) * | 2021-11-25 | 2022-03-08 | 湖南大学 | High-energy absorption structure with strong recoverability and manufacturing process |
| CN114537308A (en) * | 2022-01-25 | 2022-05-27 | 靖江市钜顺精密轻合金成型科技有限公司 | High-precision die-casting aluminum casting for automobile manufacturing and die-casting die thereof |
| CN115246451A (en) * | 2021-04-26 | 2022-10-28 | 北京航空航天大学 | Car body of racing car, preparation method of car body and formula car |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111559333A (en) * | 2020-05-28 | 2020-08-21 | 上海理工大学 | Collision-resistant front bumper anti-collision cross beam |
| CN111509161A (en) * | 2020-06-15 | 2020-08-07 | 华北电力大学（保定） | Anti-collision temperature control integrated battery module structure, processing device and method |
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| CN112406756A (en) * | 2020-12-01 | 2021-02-26 | 大连理工大学 | Anticollision roof beam assembly based on jump single cell structure of bullet |
| CN112406756B (en) * | 2020-12-01 | 2022-03-25 | 大连理工大学 | Anticollision roof beam assembly based on jump single cell structure of bullet |
| CN115246451A (en) * | 2021-04-26 | 2022-10-28 | 北京航空航天大学 | Car body of racing car, preparation method of car body and formula car |
| CN115246451B (en) * | 2021-04-26 | 2023-07-28 | 北京航空航天大学 | Automobile body of racing automobile, preparation method of automobile body and formula racing automobile |
| CN114151487A (en) * | 2021-11-25 | 2022-03-08 | 湖南大学 | High-energy absorption structure with strong recoverability and manufacturing process |
| CN114000415A (en) * | 2021-12-13 | 2022-02-01 | 江苏宏远科技工程有限公司 | Multistage layered anti-collision device |
| CN114537308A (en) * | 2022-01-25 | 2022-05-27 | 靖江市钜顺精密轻合金成型科技有限公司 | High-precision die-casting aluminum casting for automobile manufacturing and die-casting die thereof |
| CN114537308B (en) * | 2022-01-25 | 2023-01-10 | 靖江市钜顺精密轻合金成型科技有限公司 | High-precision die-casting aluminum casting for automobile manufacturing and die-casting die thereof |
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