CN109823415B - Combined carbon fiber vehicle body threshold and floor structure - Google Patents
Combined carbon fiber vehicle body threshold and floor structure Download PDFInfo
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- CN109823415B CN109823415B CN201910150726.6A CN201910150726A CN109823415B CN 109823415 B CN109823415 B CN 109823415B CN 201910150726 A CN201910150726 A CN 201910150726A CN 109823415 B CN109823415 B CN 109823415B
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Abstract
The invention discloses a combined carbon fiber vehicle body threshold and floor structure, which comprises a threshold beam, a front seat beam and a floor, wherein the threshold beam, the front seat beam and the floor are all made of carbon fiber reinforced composite materials, the threshold beam and the floor are connected through viscose glue on an inner plate of the threshold beam, embedded bolts are arranged in a viscose glue area, and the front seat beam and the floor are connected through viscose glue on a flanging area of the front seat beam. The invention reduces the weight of the whole automobile while improving the side crashworthiness of the automobile, and provides a combined carbon fiber automobile body threshold and floor structure.
Description
Technical Field
The invention relates to the field of automobile manufacturing and collision safety, in particular to a combined carbon fiber automobile body threshold and floor structure.
Background
The automobile body threshold and the floor are very important automobile protection components, can effectively resist external invasion in an automobile side collision, protect the integrity of a passenger cabin and reduce the injury of passengers in the automobile. The vehicle side wall structure has the advantages that the vehicle side wall structure is limited by the width space of the vehicle, a driver and a passenger seat in the vehicle are fixed on the floor beam and are very close to a side wall collision area, so that the vehicle side wall structure is required to have enough rigidity and strength to resist the impact of side collision, and meanwhile, the floor and the seat beam structure can provide enough support for the threshold, so that the driver cabin is pushed away from the collision area as soon as possible, and the invasion amount and invasion speed of the side wall structure to the passenger cabin are reduced. Therefore, the strength and rigidity of the automobile body threshold and the floor structure are optimally matched, and the energy absorption and deformation reduction are the main methods for ensuring the side safety performance of the automobile.
Traditional threshold roof beam, floor and seat crossbeam adopt the high strength steel plate to make in most, through optimizing structural style, material grade, steel sheet thickness, reach the crashworthiness requirement of side, but can increase automobile body weight and the performance promotes limitedly. Along with the increasingly strict national requirements on automobile emission, the light weight situation of the automobile is more and more severe, and along with the popularization of pure electric automobiles, a lighter automobile body is important to increase the driving range, so that a lighter and stronger automobile body threshold and floor structure is urgently needed to replace the traditional steel structure.
Disclosure of Invention
The invention mainly aims to provide a combined carbon fiber vehicle body threshold and floor structure for reducing the weight of the whole vehicle while improving the side crashworthiness of the vehicle.
The invention adopts the following technical scheme:
the utility model provides a modular carbon fiber car body threshold and floor structure, includes threshold roof beam, front seat crossbeam, floor, and threshold roof beam, front seat crossbeam and floor constitute by carbon fiber reinforced composite, threshold roof beam is connected through at threshold roof beam inner panel viscose with the floor, has arranged embedded bolt in the viscose region, front seat crossbeam is connected through the turn-ups district viscose at front seat crossbeam with the floor.
A combination formula carbon fiber automobile body threshold and floor structure, the threshold roof beam constitute by threshold roof beam planking, threshold roof beam inner panel, honeycomb aluminium structure, threshold roof beam planking, inner panel are carbon fiber reinforced composite, threshold roof beam planking and threshold roof beam inner panel pass through viscose and bolted connection, honeycomb aluminium structure installs in the cavity that has threshold roof beam, planking to constitute, honeycomb aluminium structure is radial and is perpendicular with the threshold roof beam.
The front seat beam consists of a front seat beam body and a beam reinforcing plate, and the front seat beam body consists of carbon fiber materials; the beam reinforcing plate is composed of a hot forming steel plate; the front row seat beam body is connected with the beam reinforcing plate through adhesive.
The combined carbon fiber vehicle body threshold and floor structure consists of a floor and front coaming overlapping area, a floor central area, a floor and threshold overlapping area, a floor and seat beam overlapping area and a middle channel, wherein the floor and seat beam overlapping area and a front row seat beam form a closed cavity; the floor is provided with more floors in the deformation area close to the threshold beam than in the deformation area far from the collision. The beneficial effects are that:
compared with the prior art, the invention has the following advantages:
(1) The invention adopts the carbon fiber reinforced composite material to realize the light weight of the vehicle body and improve the strength and rigidity of the vehicle body threshold, the floor and the front seat cross beam;
(2) According to the combined carbon fiber threshold and floor structure adopted by the invention, the honeycomb aluminum energy absorption structure is added in the hollow area of the threshold, so that the side impact energy absorption can be effectively increased, the hot forming ultra-high strength steel reinforcing plate is added in the seat cross beam, the strength, the rigidity and the deformation resistance of the seat cross beam can be effectively improved, and the invasion speed and the invasion amount of the side wall structure relative to the passenger cabin are reduced;
(3) According to the combined carbon fiber threshold and floor structure adopted by the invention, the floor structure is partitioned according to the collision stress, the thickness of the carbon fiber layer is optimized in the partition, the number of the layer in the large deformation area is more, the number of the layer in the small deformation area is less, and the weight of the vehicle body can be further reduced.
Drawings
FIG. 1 is a schematic view of a combined carbon fiber door sill and floor structure according to the present invention;
FIG. 2 is an exploded view of a carbon fiber rocker outer panel, inner panel and honeycomb energy absorbing structure;
FIG. 3 is a transverse cross-sectional view of a carbon fiber body sill beam;
FIG. 4 is a schematic view of a carbon fiber material seat beam and a beam reinforcement plate of a thermoformed steel material;
FIG. 5 is a schematic cross-sectional view of a carbon fiber material seat beam and a thermoformed steel material beam stiffener joined by glue;
FIG. 6 is a schematic view of a carbon fiber floor structure;
The reference numerals in the figures are respectively:
1. A threshold beam; 101. a threshold beam outer plate; 102. a rocker inner panel; 103. a honeycomb aluminum energy absorption structure of a threshold beam.
2. A front seat cross member; 201. front row seat front cross beam; 2011. a front row seat front cross member body; 2012. a front cross beam reinforcing plate; 202. a front seat rear cross member; 2021. a front seat rear cross member body; 2022. a rear cross beam reinforcing plate; 203. structural adhesive for composite materials.
3. A floor; 301. the floor and the dash board overlap joint area; 302. a floor center region; 303. the floor and threshold overlap area; 304. the floor and seat beam overlap area; 305. a middle channel.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the invention relates to a combined carbon fiber vehicle body threshold and floor structure, which comprises a threshold beam 1, a front seat beam 2 and a floor 3. The threshold beam, the front seat beam and the floor are both made of carbon fiber reinforced composite materials. The threshold beam is connected with the floor through the inner plate adhesive of the threshold beam, and embedded bolts are arranged in the adhesive area, so that the connection strength of the threshold beam and the floor is enhanced. The front seat cross beam is connected with the floor through the flanging area adhesive of the front seat cross beam.
As shown in fig. 2-3, the threshold beam is composed of a threshold beam outer plate 101, a threshold beam inner plate 102 and honeycomb aluminum 103, wherein the threshold beam outer plate and the threshold beam inner plate are both made of carbon fiber reinforced composite materials. The outer plate is paved with 24 layers, the inner plate is paved with 22 layers, and the inner plate and the outer plate are connected through adhesive and bolts. In the cavity that the inside and outside board constitutes of threshold roof beam, install energy-absorbing honeycomb aluminum structure, honeycomb aluminum structure is radial and is perpendicular with the threshold roof beam. When the automobile is impacted laterally, the outer plate of the threshold beam is impacted, bending deformation occurs, the honeycomb aluminum structure is axially crushed, deformed and absorbed energy, and the inner plate of the threshold beam transmits deformation and collision force to the seat cross beam and the floor structure. Compared with the traditional steel structure, the carbon fiber threshold beam has higher rigidity under bending deformation and lighter mass, and meanwhile, the honeycomb aluminum in the threshold beam also increases the side collision energy absorption capacity.
As shown in fig. 4-5, the front seat cross beam is composed of a front seat cross beam body and a cross beam reinforcing plate. The front seat front beam body 2011 and the front seat rear beam body 2021 are all made of carbon fiber materials; the front beam stiffener 2012 and the rear beam stiffener 2022 are each composed of a hot formed steel plate; the front seat beam body and the beam reinforcing plate are connected by structural adhesive 203 for composite materials. The carbon fiber seat cross beam with the thermoformed steel reinforcement plate can provide sufficient support for the rocker inner panel 102 during a side collision, reduce the amount of deformation of the rocker, and reduce the intrusion and intrusion rate of the side wall into the interior of the passenger compartment.
As shown in fig. 6, the floor structure is composed of 5 parts, namely a floor and dash panel overlapping area 301, a floor central area 302, a floor and threshold overlapping area 303, a floor and seat cross beam overlapping area 304, and a middle channel 305. The floor and threshold overlap area 303 needs to bear deformation and extrusion of the threshold inner panel 102 during a side collision, and the area is prone to cracking and failure, so that 22-26 carbon fiber cloth layers are required to be arranged to improve the strength of the floor in the area. The floor and seat beam overlap region 304, the front seat beam body and the beam reinforcing plate form a closed cavity, and the floor region is connected with the front seat beam body through glue, so that 20-22 layers of carbon fiber cloth are required to be arranged in order to provide a solid foundation for the front seat beam structure. The closed structure formed by the floor area and the front seat cross beam has the characteristics of high strength and high rigidity, and is a main force transmission structure. The central area 302 and the middle channel 305 of the floor are far away from the collision area, so that side impact is less, structural deformation is small, and the number of carbon fiber cloth layers can be properly reduced to 14-18 layers. On the basis of light weight of the carbon fiber material, the weight of the vehicle body is further reduced by optimizing the partition layering of the floor structure fiber cloth.
According to the optimization and design thought, the obtained combined carbon fiber vehicle body threshold and floor structure has the advantages that the threshold beam resists side collision, the energy absorption and buffering of the honeycomb aluminum structure are realized, the structural support of the threshold beam by the front and rear cross beams of the seat and the connection of the floor to the threshold and the seat cross beams form a combined structure with excellent side collision protection performance and remarkable light weight effect. The carbon fiber composite material can be connected through different materials for improving the crashworthiness of the steel body and reducing the weight, can also be used for developing and designing the carbon fiber body structure of the new energy automobile, can obviously improve the side collision performance and the weight reduction performance, and brings social and economic benefits.
The traditional steel threshold beam, seat beam and floor structure weigh 78 kg, and the combined carbon fiber threshold beam and floor structure weigh 60 kg. Compared with the traditional steel car body structure, the combined carbon fiber car body threshold and floor structure has the advantages of good side collision performance and light weight.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (1)
1. The combined carbon fiber vehicle body threshold and floor structure is characterized by comprising a threshold beam, a front seat beam and a floor, wherein the threshold beam, the front seat beam and the floor are made of carbon fiber reinforced composite materials, the threshold beam and the floor are connected through viscose glue on the inner plate of the threshold beam, embedded bolts are arranged in a viscose glue area, and the front seat beam and the floor are connected through viscose glue on a flanging area of the front seat beam;
The door sill beam consists of a door sill beam outer plate, a door sill beam inner plate and a honeycomb aluminum structure, wherein the door sill beam outer plate and the door sill beam inner plate are made of carbon fiber reinforced composite materials, the door sill beam outer plate and the door sill beam inner plate are connected through glue and bolts, the honeycomb aluminum structure is arranged in a cavity formed by the door sill beam inner plate and the door sill beam outer plate, and the honeycomb aluminum structure is vertical to the door sill beam in the radial direction;
the front seat cross beam consists of a front seat cross beam body and a cross beam reinforcing plate, and the front seat cross beam body consists of carbon fiber materials; the beam reinforcing plate is composed of a hot forming steel plate; the front row seat beam body is connected with the beam reinforcing plate through adhesive;
the floor structure consists of a floor and dash board overlapping area, a floor central area, a floor and threshold overlapping area, a floor and seat beam overlapping area and a middle channel, wherein the floor and seat beam overlapping area and a front row seat beam form a closed cavity; the floor is provided with more floors in the deformation area close to the threshold beam than in the deformation area far from the collision.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910150726.6A CN109823415B (en) | 2019-02-28 | 2019-02-28 | Combined carbon fiber vehicle body threshold and floor structure |
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| CN201910150726.6A CN109823415B (en) | 2019-02-28 | 2019-02-28 | Combined carbon fiber vehicle body threshold and floor structure |
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| CN109823415A CN109823415A (en) | 2019-05-31 |
| CN109823415B true CN109823415B (en) | 2024-08-02 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525522B (en) * | 2019-08-21 | 2023-10-27 | 中极氢能汽车(长治)有限公司 | Threshold beam structure of hydrogen energy automobile |
| CN111546868B (en) * | 2020-04-23 | 2021-04-13 | 浙江零跑科技有限公司 | A vehicle structure for improving the side impact safety performance of new energy electric vehicles |
| CN112339865A (en) * | 2020-11-25 | 2021-02-09 | 浙江吉利控股集团有限公司 | Collision energy-absorbing structure, vehicle body structural part and vehicle |
| CN113524808B (en) * | 2021-06-22 | 2024-02-20 | 广东汇天航空航天科技有限公司 | Aerocar floor, preparation method thereof and aerocar |
| CN114132393A (en) * | 2021-12-21 | 2022-03-04 | 广东亚太新材料科技有限公司 | Locally-reinforced lightweight carbon fiber material vehicle body middle floor |
| CN115416760B (en) * | 2022-09-02 | 2024-08-16 | 长城汽车股份有限公司 | Front floor assembly and vehicle |
| CN115923935B (en) * | 2023-01-10 | 2024-05-24 | 广州汽车集团股份有限公司 | Lower body structure and vehicle |
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