CN115805887A - Light rear bumper framework - Google Patents
Light rear bumper framework Download PDFInfo
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- CN115805887A CN115805887A CN202211724106.7A CN202211724106A CN115805887A CN 115805887 A CN115805887 A CN 115805887A CN 202211724106 A CN202211724106 A CN 202211724106A CN 115805887 A CN115805887 A CN 115805887A
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- 230000003014 reinforcing effect Effects 0.000 claims description 31
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 12
- 210000003195 fascia Anatomy 0.000 claims 9
- 238000005266 casting Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000004512 die casting Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a light rear bumper framework, which comprises a strip-shaped framework body, wherein the framework body comprises a top plate and a bottom plate which are horizontally arranged, the top plate and the bottom plate are arranged in an up-and-down opposite manner, a vertically arranged middle pressure resisting plate is connected between the top plate and the bottom plate, the middle pressure resisting plate, the top plate and the bottom plate extend in the same direction, the upper edge of the middle pressure resisting plate is fixedly connected with the middle part of the top plate, and the lower edge of the middle pressure resisting plate is fixedly connected with the bottom plate; the front side of the middle pressure-resistant plate is provided with an impact-resistant plate which is vertically connected with the middle pressure-resistant plate, a buffer deformation cavity is formed by the impact-resistant plate, the middle pressure-resistant plate, the top plate and the bottom plate, and an opening of the buffer deformation cavity faces to the front of the middle pressure-resistant plate. The invention has the beneficial effects that: the structure is designed into a thin-wall frame type structure, which not only provides enough structural strength, but also controls the material consumption, thereby reducing the weight; in addition, the whole framework can be molded by conventional casting or die casting, and is easy to produce.
Description
Technical Field
The invention relates to the technical field of seats, in particular to a light rear bumper framework.
Background
Under the condition of meeting the standard, the vehicle body weight is reduced, the vehicle running energy consumption can be reduced, and the power response speed is improved. Automotive body-in-white and non-body load-bearing structural components are typically made of steel. As part of the goal of achieving vehicle weight reduction, it is important to use lightweight materials to make non-major structural components. In recent years, light metal materials are increasingly used for automobile parts, and the weight of products processed by using the light metals is greatly reduced compared with that of steel products under the same performance index. However, light metal materials such as aluminum alloys and magnesium alloys have different workability from steel materials. Light metal materials are generally not suitable for being formed by processing methods such as stamping and the like, and are easy to oxidize at high temperature, so the light metal materials are also not suitable for being assembled by welding. Therefore, the structural design must satisfy the requirements of light weight, strong bearing capacity, easy molding and manufacturing, etc.
Disclosure of Invention
In view of the above, the present invention aims to provide a light rear bumper frame.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the light rear bumper framework is characterized by comprising a strip-shaped framework body, wherein the framework body comprises a top plate and a bottom plate which are horizontally arranged, the top plate and the bottom plate are arranged up and down oppositely, a middle pressure resisting plate which is vertically arranged is connected between the top plate and the bottom plate, the middle pressure resisting plate extends in the same direction as the top plate and the bottom plate, the upper edge of the middle pressure resisting plate is fixedly connected with the middle part of the top plate, and the lower edge of the middle pressure resisting plate is fixedly connected with the bottom plate;
the front side of the middle pressure-resistant plate is provided with an impact-resistant plate which is vertically connected with the middle pressure-resistant plate, a buffer deformation cavity is formed by the impact-resistant plate, the middle pressure-resistant plate, the top plate and the bottom plate, and an opening of the buffer deformation cavity faces to the front of the middle pressure-resistant plate.
Preferably, a group of said impact-resistant panels close to each other forms a reinforcing structural unit comprising at least two said impact-resistant panels cross-connected;
the reinforcing structure units are distributed along the length direction of the middle pressure-resistant plate.
Preferably, the reinforcing structure unit includes a set of circumferentially distributed impact-resistant plates, inner edges of the same set of impact-resistant plates are connected at a center line of the impact-resistant plates in an intersecting manner, outer edges of the same set of impact-resistant plates extend outward respectively, and the impact-resistant plates are fixedly connected with outer edges of the top plate or the bottom plate corresponding to the outer edges.
Preferably, the top plate and the bottom plate are partially offset upwards or downwards to form reinforcing ribs distributed at intervals, and the reinforcing ribs penetrate through the top plate or the bottom plate in the front-back direction;
and a reinforcing rib is connected between the top plate and the rear side surface of the impact-resistant plate and is arranged along the front-back direction.
Preferably, said intermediate compression plate is partially recessed forward to form a carton, the opening of which is directed rearward;
a reinforcing connecting plate is connected between the outer wall of the packing box and the corresponding top plate and bottom plate, and the reinforcing connecting plate is vertically connected with the impact-resistant plate;
the part of the bottom plate below the packing box is connected with a group of support lugs extending horizontally and backwards, the support lugs are arranged along the length direction of the bottom plate, and the same support plate is stacked on the support lugs.
Preferably, a fitting through hole is formed in the bottom of the fitting box, a first cylinder extending forwards is connected to the hole edge of the fitting through hole, the outer wall of the first cylinder is connected with the corresponding reinforcing connecting plate, and the outer wall of the first cylinder is connected with the adjacent reinforcing structure unit.
Preferably, the bottom of the casing is partially offset to the front of the middle pressure resisting plate to form a casing cavity, the wall of the casing cavity extends forwards beyond the front edges of the top plate and the bottom plate, the casing cavity and the first cylinder share the same side wall, and a through hole is formed in the side wall of the casing cavity, which faces away from the first cylinder, and is located in front of the top plate and the bottom plate.
Preferably, the rear bumper framework comprises two framework units, and the two framework units are spliced along the length direction to form the rear bumper framework;
the framework units comprise the framework bodies, joints are formed at one ends of the framework bodies, and the joints of the two framework units are assembled and connected;
each framework body is respectively provided with the packing box in a molding mode, and each framework unit is internally provided with the framework body, the packing box, the impact-resistant plate and the reinforcing connecting plate in an integrated molding mode.
Preferably, the skeleton unit includes a right skeleton and a left skeleton;
the joints comprise a first joint arranged on the right framework and a second joint arranged on the left framework, and the two joints are staggered front and back and are connected in an overlapping manner;
the top plates of the right framework and the left framework are in lap joint through connecting plates at joints.
Preferably, the first joint comprises two first extending portions extending out to the left framework along the middle compression plate of the right framework, the two first extending portions are arranged up and down, the second joint comprises a second extending portion arranged on the left framework, the extending direction of the second extending portion is opposite to that of the first extending portion, the second extending portion and the first extending portion are staggered back and forth to be overlapped, and at least part of the second extending portion and the middle compression plate of the right framework are overlapped front and back;
at least two connecting columns are formed on the second extending part, connecting holes are formed in the middle pressure-resistant plate of the right framework and the first extending part, and the connecting holes correspond to the connecting columns one by one and are connected through bolts;
the second extending parts are partially offset backwards to form clamping convex blocks which extend between the two first extending parts.
The invention has the beneficial effects that: the structure is designed into a thin-wall frame type structure, which not only provides enough structural strength, but also controls the material consumption, thereby reducing the weight; in addition, the whole framework can be molded by conventional casting or die casting, and is easy to produce.
Drawings
FIG. 1 is a schematic diagram of a first perspective of the present invention;
FIG. 2 is a schematic diagram of a second perspective of the present invention;
FIG. 3 is a schematic structural diagram of the decomposition states of the right skeleton and the left skeleton;
fig. 4 is a schematic view of another perspective of fig. 3.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
The utility model provides a light-duty rear bumper skeleton, includes the skeleton body of rectangular shape, this skeleton body includes roof 110 and bottom plate 120 of level setting, and the relative setting about the two is connected with the middle resistance to compression board 130 of vertical setting between the two, this middle resistance to compression board 130 with roof 110 and bottom plate 120 syntropy extend, the top edge of this middle resistance to compression board 130 with the middle part fixed connection of roof 110, the lower limb with bottom plate 120 fixed connection. An impact-resistant plate 140 is disposed on a front side of the middle compression-resistant plate 130, i.e., a side facing a vehicle compartment, the impact-resistant plate 140 is vertically connected to the middle compression-resistant plate 130, a buffer deformation cavity 150 is defined by the impact-resistant plate 140, the middle compression-resistant plate 130, and the top plate 110 and the bottom plate 120, and an opening of the buffer deformation cavity 150 faces a front side of the middle compression-resistant plate 130.
As shown in fig. 1 to 4, the top plate 110, the bottom plate 120, and the intermediate platen 130 are formed in a groove-like structure in front of the intermediate platen 130, so that the plate can resist a certain degree of impact and can collapse and absorb energy when the impact force is large. The impact resistant plate 140 further improves the impact resistance of the intermediate pressure resistant plate 130, can be elastically deformed under a small impact and can be plastically deformed under a large impact, and the buffer deformable cavity 150 provides a compression space for the deformation of the structure.
The structure is designed to be a thin-wall frame type structure, which not only provides enough structural strength, but also controls the material consumption, thereby reducing the weight. In addition, the whole framework can be molded by conventional casting or die casting, and is demolded along the front-back direction during demolding.
To further improve the structural strength and the force-bearing capacity, a set of said impact-resistant panels 140 close to each other form a reinforced structural unit comprising at least two said impact-resistant panels 140 cross-connected. The reinforcing structure units are distributed along the length direction of the middle pressure-resistant plate 130.
In one embodiment, the reinforced structural unit includes a plurality of circumferentially distributed impact-resistant plates 140, inner edges of the impact-resistant plates 140 of the same group meet at a center line of the impact-resistant plates 140, outer edges of the impact-resistant plates 140 of the same group respectively extend outward, and the impact-resistant plates 140 are fixedly connected with the outer edges of the top plate 110 or the bottom plate 120.
The top plate 110 and the bottom plate 120 serve as a member for connecting the rear bumper to the vehicle body, and in order to improve rigidity and strength, the top plate 110 and the bottom plate 120 are partially offset upward or downward to form ribs 101 distributed at intervals, and the ribs 101 penetrate through the top plate 110 or the bottom plate 120 in the front-rear direction.
Further, since a tail lamp and an outer decorative case are mounted behind impact-resistant plate 140, top plate 110 needs to have sufficient rigidity and strength as a main attachment structure of the outer decorative case. Therefore, a reinforcing rib 102 is connected between the top plate 110 and the rear side of the impact-resistant plate 140, thereby improving the load-bearing capacity. The reinforcing ribs 102 are provided in the front-rear direction so as to be integrally formed with the top plate 110, the bottom plate 120, and the impact-resistant plate 140.
In order to facilitate mounting of a bumper attachment such as a tail lamp on the rear bumper, the intermediate pressure plate 130 is partially recessed forward to form a pocket 170, and the pocket 170 is opened toward the rear side. A reinforcing connecting plate 160 is connected between the outer wall of the casing 170 and the corresponding top plate 110 and bottom plate 120, and the reinforcing connecting plate 160 is vertically connected with the impact-resistant plate 140, so that the demolding of the skeleton product is not affected.
A group of support lugs 121 extending horizontally and rearwardly are connected to a portion of the bottom plate 120 below the box assembly 170, the group of support lugs 121 are arranged along the length direction of the bottom plate 120, and a same support plate 122 is stacked on the group of support lugs 121. The support lug 121 can be formed along with the main body structure, the support lug 121 is reinforced by the support plate 122 in the later stage, the structural strength of the part box 170 is convenient to improve, and meanwhile, a site is provided for mounting of a bumper accessory part and a bumper decorative shell.
A fitting through hole 171 is formed in the bottom of the fitting box 170, a first cylinder 172 extending forward is connected to the edge of the fitting through hole 171, the outer wall of the first cylinder 172 is connected to the corresponding reinforcing connecting plate 160, and the outer wall of the first cylinder 172 is connected to the adjacent reinforcing structure unit. The first cylinder 172 further increases the installation space of the cartridge 170, and the through structure thereof facilitates the passage of the wiring harness.
The bottom of the casing 170 is partially offset to the front of the middle compression resistant plate 130 to form a casing 173, the casing 173 shares the same sidewall with the first cylinder 172, and a through hole is formed on the sidewall of the casing 173 facing away from the first cylinder 172. The adaptor cavity 173 provides a mounting location for other accessory components. Due to the requirement of an installation space, the via hole is installed on the wall of the part installing cavity 173 extending out of the groove-shaped structure, and when the framework main body is formed, the via hole can be formed in a core pulling mode without affecting product demoulding.
The bumper framework can be formed by one-step casting, but because the length of the bumper framework is larger, the bumper framework is more economically and reliably formed into a product by adopting a sectional forming and reassembling mode.
Therefore, in this embodiment, as shown in fig. 1 to 4, the rear bumper frame includes two frame units, and the two frame units are spliced along the length direction to form the rear bumper frame. The skeleton unit includes the skeleton body, the one end shaping of skeleton body has the joint, two the joint assembly connection of skeleton unit. The box-filling 170 is formed on each framework body, and the framework body, the box-filling 170, the impact-resistant plate 140 and the reinforcing connecting plate 160 in each framework unit are integrally formed.
The frame unit includes a right frame 200 and a left frame 100, which correspond to the right side and the left side of the vehicle body, respectively. Two cartridges 170 are adjacent to the left and right sides, respectively. The joint comprises a first joint 300 arranged on the right framework 200 and a second joint 400 arranged on the left framework 100, and the joints are staggered and connected in an overlapping mode from front to back. The top plates 110 of the right and left frames 200 and 100 are overlapped at the joints by connecting plates, thereby ensuring the overall strength of the structure.
The first joint 300 includes two first extension portions 310 extending from the middle compression plate 130 of the right frame 200 to the left frame 100, the two first extension portions 310 are arranged up and down, the second joint 400 includes a second extension portion 410 disposed on the left frame 100, the extension direction of the second extension portion 410 is opposite to that of the first extension portion 310, and the second extension portion 410 is staggered from front to back to overlap, and at least a part of the second extension portion 410 and the middle compression plate 130 of the right frame 200 are overlapped from front to back to ensure the connection strength. The front sides of the middle compression resistant plates 130 of the right and left bobbins 200 and 100 are smoothly transitioned at the joints.
At least two connecting columns 420 are formed on the second extension part 410, connecting holes 320 are formed on the middle pressure-resistant plate 130 and the first extension part 310 of the right frame 200, and the connecting holes 320 are in one-to-one correspondence with the connecting columns 420 and are connected through bolts. The outer wall of the connecting column 420 is also provided with a reinforcing rib plate, and the edge of the connecting hole 320 is provided with an annular reinforcing rib.
In addition, the second extension portion 410 is partially offset backward to form a fastening protrusion 430, and the fastening protrusion 430 extends between the two first extension portions 310, so as to improve positioning stability. The engagement protrusion 430 is a forward opening cavity structure and can also serve as a mounting site for an accessory component.
The two frameworks can be assembled after being integrally formed by adopting light metal respectively, and the structural design ensures the characteristics of high strength, light weight and easy forming.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a light-duty rear bumper skeleton which characterized in that: the framework comprises a strip-shaped framework body, wherein the framework body comprises a top plate (110) and a bottom plate (120) which are horizontally arranged, the top plate (110) and the bottom plate (120) are arranged in an up-and-down opposite manner, a middle pressure resisting plate (130) which is vertically arranged is connected between the top plate and the bottom plate, the middle pressure resisting plate (130) extends in the same direction as the top plate (110) and the bottom plate (120), the upper edge of the middle pressure resisting plate (130) is fixedly connected with the middle part of the top plate (110), and the lower edge of the middle pressure resisting plate is fixedly connected with the bottom plate (120);
an anti-impact plate (140) is arranged on the front side of the middle pressure-resistant plate (130), the anti-impact plate (140) is vertically connected with the middle pressure-resistant plate (130), a buffer deformation cavity (150) is enclosed among the anti-impact plate (140), the middle pressure-resistant plate (130), the top plate (110) and the bottom plate (120), and an opening of the buffer deformation cavity (150) faces to the right front of the middle pressure-resistant plate (130).
2. The light weight rear bumper fascia according to claim 1, wherein: a set of said impact panels (140) adjacent to each other forming a reinforced structural unit comprising at least two of said impact panels (140) cross-connected;
the reinforcing structure units are distributed along the length direction of the middle pressure-resistant plate (130).
3. The light weight rear bumper fascia according to claim 2, wherein: the reinforced structure unit comprises a group of impact-resistant plates (140) distributed in the circumferential direction, the inner edges of the impact-resistant plates (140) in the same group are in intersection connection at the center line of the impact-resistant plates (140), the outer edges of the impact-resistant plates (140) in the same group extend outwards respectively, and the impact-resistant plates (140) correspond to the outer edges of the top plate (110) or the bottom plate (120) and are fixedly connected with the outer edges.
4. The light weight rear bumper fascia according to claim 1, wherein: the top plate (110) and the bottom plate (120) are both partially offset upwards or downwards so as to form reinforcing ribs (101) distributed at intervals, and the reinforcing ribs (101) penetrate through the top plate (110) or the bottom plate (120) in a front-back mode;
a reinforcing rib (102) is connected between the top plate (110) and the rear side of the impact resistant plate (140), and the reinforcing rib (102) is arranged along the front-rear direction.
5. The light weight rear bumper fascia according to claim 2, wherein: the intermediate compression plate (130) is partially recessed forward to form a cartridge (170), the cartridge (170) being open toward the rear side;
a reinforcing connecting plate (160) is connected between the outer wall of the box (170) and the corresponding top plate (110) and bottom plate (120), and the reinforcing connecting plate (160) is vertically connected with the impact-resistant plate (140);
the part of the bottom plate (120) below the box (170) is connected with a group of support lugs (121) which horizontally extend backwards, the group of support lugs (121) are arranged along the length direction of the bottom plate (120), and the same support plate (122) is stacked on the group of support lugs (121).
6. The light weight rear bumper fascia according to claim 5, wherein: the bottom of the packing box (170) is provided with a packing through hole (171), the edge of the packing through hole (171) is connected with a first cylinder (172) extending forwards, the outer wall of the first cylinder (172) is connected with the corresponding reinforcing connecting plate (160), and the outer wall of the first cylinder (172) is connected with the adjacent reinforcing structure unit.
7. The light weight rear bumper fascia according to claim 6, wherein: the bottom of the packing box (170) is partially offset towards the front of the middle pressure resisting plate (130) to form a packing cavity (173), the wall of the packing cavity (173) extends forwards beyond the front edges of the top plate (110) and the bottom plate (120), the packing cavity (173) and the first cylinder (172) share the same side wall, and a through hole is formed in the side wall of the packing cavity (173), which faces away from the first cylinder (172), and is positioned in front of the top plate (110) and the bottom plate (120).
8. The light weight rear bumper fascia according to claim 5, wherein: the rear bumper comprises two framework units, wherein the two framework units are spliced along the length direction to form a rear bumper framework;
the framework units comprise the framework bodies, joints are formed at one ends of the framework bodies, and the joints of the two framework units are assembled and connected;
each framework body is respectively provided with the box filling (170), and the framework body, the box filling (170), the impact-resistant plate (140) and the reinforcing connecting plate (160) in each framework unit are integrally formed.
9. The light weight rear bumper fascia according to claim 8, wherein: the skeleton unit comprises a right skeleton (200) and a left skeleton (100);
the joints comprise a first joint (300) arranged on the right framework (200) and a second joint (400) arranged on the left framework (100), and the two joints are staggered front and back and are connected in an overlapping manner;
the top plates (110) of the right framework (200) and the left framework (100) are overlapped at joints through connecting plates.
10. The light weight rear bumper fascia according to claim 9, wherein: the first joint (300) comprises two first extension parts (310) extending towards the left framework (100) along the middle pressure resistant plate (130) of the right framework (200), the two first extension parts (310) are arranged up and down, the second joint (400) comprises a second extension part (410) arranged on the left framework (100), the extension directions of the second extension part (410) and the first extension part (310) are opposite, the second extension part and the first extension part are staggered back and forth for superposition, and the second extension part (410) and the middle pressure resistant plate (130) of the right framework (200) are at least partially overlapped front and back;
at least two connecting columns (420) are formed on the second extending part (410), connecting holes (320) are formed on the middle pressure-resistant plate (130) of the right framework (200) and the first extending part (310), and the connecting holes (320) are in one-to-one correspondence with the connecting columns (420) and are connected through bolts;
the second extension portion (410) is partially offset rearward to form a snap-fit projection (430), and the snap-fit projection (430) extends between the two first extension portions (310).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211724106.7A CN115805887A (en) | 2022-12-30 | 2022-12-30 | Light rear bumper framework |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211724106.7A CN115805887A (en) | 2022-12-30 | 2022-12-30 | Light rear bumper framework |
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| Publication Number | Publication Date |
|---|---|
| CN115805887A true CN115805887A (en) | 2023-03-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211724106.7A Pending CN115805887A (en) | 2022-12-30 | 2022-12-30 | Light rear bumper framework |
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| Country | Link |
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| CN (1) | CN115805887A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946577A (en) * | 2004-02-27 | 2007-04-11 | 克旦斯革新公司 | Vehicle bumper including a tow ring insert |
| CN108382340A (en) * | 2018-02-09 | 2018-08-10 | 重庆长安汽车股份有限公司 | A kind of connection structure of automobile Front upper bumper and front-end module |
| CN111332235A (en) * | 2020-03-27 | 2020-06-26 | 吉林大学 | Bumper of imitated straw structure |
| CN211280927U (en) * | 2019-10-28 | 2020-08-18 | 浙江吉利控股集团有限公司 | Front bumper middle support and vehicle with same |
| CN215706153U (en) * | 2021-04-16 | 2022-02-01 | 上海凌云工业科技有限公司凌云汽车技术分公司 | Lightweight composite material automobile anti-collision beam assembly |
-
2022
- 2022-12-30 CN CN202211724106.7A patent/CN115805887A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946577A (en) * | 2004-02-27 | 2007-04-11 | 克旦斯革新公司 | Vehicle bumper including a tow ring insert |
| CN108382340A (en) * | 2018-02-09 | 2018-08-10 | 重庆长安汽车股份有限公司 | A kind of connection structure of automobile Front upper bumper and front-end module |
| CN211280927U (en) * | 2019-10-28 | 2020-08-18 | 浙江吉利控股集团有限公司 | Front bumper middle support and vehicle with same |
| CN111332235A (en) * | 2020-03-27 | 2020-06-26 | 吉林大学 | Bumper of imitated straw structure |
| CN215706153U (en) * | 2021-04-16 | 2022-02-01 | 上海凌云工业科技有限公司凌云汽车技术分公司 | Lightweight composite material automobile anti-collision beam assembly |
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