CN115649098A - Vehicle body system for improving small offset collision performance and vehicle - Google Patents
Vehicle body system for improving small offset collision performance and vehicle Download PDFInfo
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Abstract
The invention discloses a vehicle body system and a vehicle for improving small offset collision performance, which comprise a front anti-collision beam assembly, a front longitudinal beam assembly, a front finger beam assembly and a switching component, wherein the front anti-collision beam assembly comprises a front anti-collision cross beam, first energy absorption boxes fixed on the rear sides of the left and right ends of the front anti-collision cross beam and second energy absorption boxes connected to the outer sides of the first energy absorption boxes; the front end of the front longitudinal beam assembly is connected with the rear end of the first energy absorption box, the inner side of the rear part of the front longitudinal beam assembly is connected with the front floor longitudinal beam through a bracket, and the inner side of the rear part of the front longitudinal beam assembly is connected with the threshold boundary beam through a lining plate; the front end of the front fingerboard assembly is connected with the second energy absorption box, the inner side of the front end of the front fingerboard assembly is fixedly connected with the outer side of the front longitudinal beam assembly into a whole through a switching component, the rear end of the front fingerboard assembly is connected with an A-pillar assembly, and the lower end of the A-pillar assembly is connected with a threshold boundary beam. The deformation of the passenger compartment can be reduced, and the requirement of the front small offset collision performance is met.
Description
Technical Field
The invention relates to the field of automobile bodies, in particular to a body system for improving small offset collision performance and a vehicle.
Background
The automobile body of the automobile is an important function carrier of the whole automobile and is a safe fort for protecting passengers and pedestrians. With the continuous upgrade of various global safety standards and the implementation of various safety evaluation standards proposed by the insurance industry based on the interest consideration of the insurance industry, the safety evaluation of the traditional automobile body is adversely affected. In the safety collision test of automobiles, the front 25% small offset collision has the most serious challenge on the safety performance of automobile bodies, in popular terms, the collision load energy of the whole automobile is loaded on 25% of automobile body structures, and the collided area bears 4 times of energy equivalent to normal working conditions, so that the challenge on the performance of the automobile body structures is huge.
At present, in order to meet the increasingly severe requirement of offset collision, various automobile factories mainly adopt a method of local reinforcement of 'patching' on the basis of an original automobile body design scheme, and some reinforcement or buffer supports are added at the later stage to improve the local stress form, so that the collision test of a test-taking type is carried out for coping, the systematic safety design is lacked, the safety performance of the offset collision cannot be basically improved, and the safety of the whole automobile is very unfavorable.
Therefore, the invention provides the automobile front small offset collision safety body system, which systematically improves the safety collision performance of the whole automobile, is well adapted to the mainstream manufacturing implementation mode of the current automobile factories, effectively solves the problem of collision safety, greatly reduces the implementation cost and improves the technical level.
Disclosure of Invention
The invention aims to provide a vehicle body system and a vehicle for improving small offset collision performance, which can reduce deformation of a passenger compartment and meet the requirement of front small offset collision performance.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a vehicle body system for improving small offset collision performance comprises a front anti-collision beam assembly, a front longitudinal beam assembly, a front finger beam assembly and a switching component, wherein the front anti-collision beam assembly comprises a front anti-collision cross beam, first energy absorption boxes fixed to the rear sides of the left and right parts of the front anti-collision cross beam and second energy absorption boxes connected to the outer sides of the first energy absorption boxes; the front end of the front longitudinal beam assembly is connected with the rear end of the first energy absorption box, the inner side of the rear part of the front longitudinal beam assembly is connected with the front floor longitudinal beam through a bracket, and the inner side of the rear part of the front longitudinal beam assembly is connected with the threshold boundary beam through a lining plate; the front end of the front fingerboard assembly is connected with the second energy absorption box, the inner side of the front end of the front fingerboard assembly is fixedly connected with the outer side of the front longitudinal beam assembly into a whole through a switching component, the rear end of the front fingerboard assembly is connected with an A-pillar assembly, and the lower end of the A-pillar assembly is connected with a threshold boundary beam.
Further, the front anti-collision cross beam is made of aluminum alloy extruded sections, steel plate stamping welding, ultra-high strength steel rolling or hot forming steel; the first energy absorption box is made by stamping a steel plate with the thickness of 1.5-3.0 mm and the tensile strength of 400-600MPa; the second energy absorption box is made of dual-phase steel with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 600MPa.
Further, the front longitudinal beam assembly comprises a front longitudinal beam section and a front longitudinal beam rear section, the front longitudinal beam section is manufactured by punching a steel plate with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 1000MPa, and the surface of the front longitudinal beam section is coated with a pure zinc or zinc-iron anticorrosive coating; the rear section of the front longitudinal beam is made of hot forming steel with the thickness of 2.0-3.0 mm and the tensile strength of 1500-2000 MPa, and an Al-Si protective coating is coated on the surface of the rear section of the front longitudinal beam;
further, the A column assembly comprises a A column body, a reinforcing piece connected to the A column body and an A column upper boundary beam lapped with the upper end of the A column body, wherein the A column body is manufactured by stamping a high-strength steel plate with the thickness of 1.4 to 2.4mm and the tensile strength of 800 to 1200MPa or is manufactured by hot-forming steel with the thickness of 1.4 to 2.4mm and the tensile strength of 1500 to 2000MPa, and an Al-Si protective coating is protected on the surface; the reinforcing piece is made by stamping a high-strength steel plate with the thickness of 1.2 to 2.0mm and the tensile strength of 600 to 1000MPa, or is made by adopting a nylon framework and a high-strength filling colloid; the A-column upper edge beam is formed by punching an ultrahigh-strength steel plate with the thickness of 1.2 to 2.4mm and the tensile strength of 1200MPa, or is formed by hot forming steel with the thickness of 1.2 to 2.4mm and the tensile strength of 1500 to 2000 MPa.
Furthermore, the front part of the A-column upper edge beam is bent downwards to form a vertical section, and the lower end of the vertical section is fixed with the upper end of the A-column body in an overlapping manner.
Further, the front anti-collision beam is an arc protruding towards the front, and the radius of the arc is 1000-3000 mm.
Furthermore, the outer side face of the rear part of the adapter component is an inclined plane, and the included angle between the inclined plane and the axis of the front longitudinal beam assembly is 15-85 degrees.
Further, the threshold side beam is made of hot forming steel with the thickness of 1.2 to 2.0mm and the tensile strength of 1500 to 2000MPa, or is made of dual-phase steel with the thickness of 1.2 to 2.0mm and the tensile strength of 1200MPa through rolling or rolling and stamping mixed technology; the bracket and the lining plate are made of steel with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 600MPa.
Further, the front fingerboard assembly is made of steel with the thickness of 1.6 to 3.0mm and the tensile strength of 600 to 1000MPa, and the surface of the front fingerboard assembly is coated with a pure zinc or zinc-iron anticorrosive coating; the adapter member is made of steel with the thickness of 1.6-2.5 mm and the tensile strength of 400-800MPa.
A vehicle comprises the vehicle body system for improving the small offset collision performance.
The invention has the beneficial effects that:
1. the left end and the right end of the front anti-collision cross beam extend outwards to form extending parts, the extending parts are positioned in front of the second energy absorption box, so that the front anti-collision cross beam can be firstly contacted with the collision barrier in small offset collision, collision energy is absorbed by the first energy absorption box, is transmitted to the front longitudinal beam assembly and guided, and is decomposed by the front floor longitudinal beams and the doorsill side beams on the left side and the right side of the rear part of the front longitudinal beam assembly through the bracket and the lining plate, and the path mainly bears residual energy of the first energy absorption box and does not influence the whole vehicle main body framework. After the collision barrier collides and absorbs with the first energy absorption box, the collision barrier continues to push towards the direction of the vehicle body, and the main residual collision energy is contacted with the second energy absorption box to absorb part of energy. After passing through the second energy-absorbing box, the collision barrier continuously collides with the front fingerboard assembly and the switching component, the front fingerboard assembly transmits the collision energy to the A-pillar assembly, and the switching component transmits part of the energy to the front longitudinal beam assembly, so that the small offset collision energy of the collision barrier is effectively reduced, the deformation of a passenger compartment is avoided, and the requirement of the front small offset collision performance is met.
2. The invention limits the specific materials of each part, reduces the cost investment on the premise of ensuring the economic benefit and effectively ensures the small bias collision performance of the vehicle body system.
3. The vehicle body system capable of improving the small offset collision performance can realize platform application, is transplanted, copied or imitated on different platforms, is suitable for various automobile safety systems with different complexity degrees, and can be continuously iterated along with the upgrading of the platforms.
Drawings
FIG. 1 is a schematic structural view of a vehicle body system for enhancing small offset crash performance according to the present invention;
FIG. 2 is a side view of the vehicle body system of the present invention for enhancing low offset crash performance;
FIG. 3 is a schematic structural view of a front impact beam according to the present invention;
FIG. 4 is a schematic view of the adapter member of the present invention;
FIG. 5 is a side view of the adapter member of the present invention;
FIG. 6 is a schematic structural view of an A-pillar assembly according to the present invention.
In the figure, 1-front anti-collision cross beam, 2-first energy absorption box, 3-second energy absorption box, 4-front longitudinal beam section, 5-front longitudinal beam rear section, 6-front fingerboard assembly, 7-switching component, 71-upper component, 72-lower component, 8-bracket, 9-front floor longitudinal beam, 10-lining board, 11-doorsill edge beam, 12-A column assembly, 121-A column body, 122-reinforcing component, 123-A column upper edge beam, 13-collision barrier, 14-lap line, 15-existing lap line.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure herein, wherein the embodiments of the present invention are described in detail with reference to the accompanying drawings and preferred embodiments. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, amount and proportion of each component in actual implementation can be changed freely, and the layout of the components can be more complicated.
Referring to fig. 1 and 2, the vehicle body system for improving the small offset collision performance comprises a front anti-collision beam assembly, a front longitudinal beam assembly, a front finger beam assembly 6 and a switching member 7, wherein the front anti-collision beam assembly comprises a front anti-collision cross beam 1, first energy absorption boxes 2 fixed on the rear sides of the left and right parts of the front anti-collision cross beam 1 and second energy absorption boxes 3 connected to the outer sides of the first energy absorption boxes 2, the left and right end parts of the front anti-collision cross beam 1 extend outwards to form an extension part, and the extension part is positioned in front of the second energy absorption boxes 3. The front end of the front longitudinal beam assembly is connected with the rear end of the first energy absorption box 2, the inner side of the rear part of the front longitudinal beam assembly is connected with a front floor longitudinal beam 9 through a bracket 8, and the inner side of the rear part of the front longitudinal beam assembly is connected with a threshold side beam 11 through a lining plate 10. The front end of the front fingerboard assembly 6 is connected with the second energy absorption box 3, the inner side of the front end of the front fingerboard assembly 6 is fixedly connected with the outer side of the front longitudinal beam assembly into a whole through a switching component 7, the rear end of the front fingerboard assembly 6 is connected with an A column assembly 12, and the lower end of the A column assembly 12 is connected with a doorsill boundary beam 11.
Referring to fig. 3, the front anti-collision beam 1 is an arc protruding towards the front, the arc radius is 1000 to 3000mm, and the function of guiding the extension part to the impact force in different degrees is realized by adjusting the arc radius parameters. The front anti-collision beam 1 is made of aluminum alloy extruded sections, steel plate stamping welding, ultrahigh-strength steel rolling or hot forming steel. In this embodiment, preceding crashproof crossbeam 1 adopts the super high-strength steel roll-in mode that cost and performance are synthesized balancedly, adopts thickness to be 2.4mm, and tensile strength is 1200 MPa's dual phase steel, has both guaranteed higher intensity, has reduced weight and cost, has good ductility simultaneously, has avoided the brittle failure risk that martensite steel or the lower elongation of hot forming steel brought, through the manufacturing process of welding after the roll-in, obtains preceding crashproof crossbeam 1.
The first energy absorption box 2 is made by stamping a steel plate with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 600MPa; the second energy-absorbing box 3 is made of dual-phase steel with the thickness of 1.5-3.0 mm and the tensile strength of 400-600MPa, and the size of the second energy-absorbing box is determined according to the simulation analysis of the collision energy-absorbing CAE. In the embodiment, the first energy-absorbing box 2 is made of high-strength dual-phase steel with the thickness of 2.5mm and the tensile strength of 600MPa, has certain strength and strong collapse deformation performance, and absorbs the collision energy to the maximum extent. The first energy absorption box 2 is fixedly connected with the left part or the right part of the front anti-collision beam 1 through a welding process. The second energy absorption box 3 is made of dual-phase steel with the thickness of 2.0mm and the tensile strength of 600MPa, the external dimension of the second energy absorption box is wide multiplied by the height multiplied by the length =110mm multiplied by 50mm, and the second energy absorption box 3 is fixedly connected with the first energy absorption box 2 through a spot welding process.
The front longitudinal beam assembly comprises a front longitudinal beam front section 4 and a front longitudinal beam rear section 5, wherein the front longitudinal beam front section 4 is manufactured by punching a steel plate with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 1000MPa, and the surface of the steel plate is coated with a pure zinc or zinc-iron anticorrosive coating; the front longitudinal beam rear section 5 is made of hot forming steel with the thickness of 2.0-3.0 mm and the tensile strength of 1500-2000 MPa, and an Al-Si protective coating is coated on the surface. In the embodiment, the front section 4 of the front longitudinal beam is formed by stamping a hot-galvanized high-strength steel plate with the thickness of 2.5mm, the tensile strength of 800MPa and the weight of 50/50g, and the front section 4 of the front longitudinal beam is fixedly connected with the rear end of the first energy absorption box 2 through eight high-strength bolts. The rear section 5 of the front longitudinal beam is made of Al-Si protective coating hot forming steel with the thickness of 2.2mm and the tensile strength of 1500 MPa.
Referring to fig. 6, the a-pillar assembly 12 includes an a-pillar body 121, a reinforcement 122 connected to the a-pillar body 121, and an a-pillar upper beam 123 overlapping the upper end of the a-pillar body 121, where the a-pillar body 121 is made of a high-strength steel plate with a thickness of 1.4 to 2.4mm and a tensile strength of 800 to 1200mpa by stamping, or is made of hot-formed steel with a thickness of 1.4 to 2.4mm and a tensile strength of 1500 to 2000mpa, and has an Al-Si protective coating on its surface. The reinforcing member 122 is made by stamping a high-strength steel plate with the thickness of 1.2 to 2.0mm and the tensile strength of 600 to 1000MPa, or is made by adopting a nylon framework and a high-strength filling colloid. The A-column upper edge beam 123 is formed by punching an ultrahigh-strength steel plate with the thickness of 1.2 to 2.4mm and the tensile strength of 1200MPa, or is formed by hot forming steel with the thickness of 1.2 to 2.4mm and the tensile strength of 1500 to 2000 MPa. In this embodiment, the pillar a roof side rail 123 is made of hot-formed steel having a thickness of 2.0mm and a tensile strength of 1500MPa, and is protected from corrosion by an Al — Si plating layer. The front fingerboard assembly 6 and the A-pillar assembly 12 are connected and combined into a whole through a spot welding process.
The doorsill side beam 11 is made of hot formed steel with the thickness of 1.2-2.0 mm and the tensile strength of 1500-2000 MPa, or is made of dual-phase steel with the thickness of 1.2-2.0 mm and the tensile strength of 1200MPa through a rolling or rolling and stamping mixed process; the bracket and the lining plate are made of steel with the thickness of 1.5-3.0 mm and the tensile strength of 400-600MPa. The threshold boundary beam 11 is connected and combined with the lower end of the A column assembly 12 into a whole through a spot welding process.
The front fingerboard assembly 6 is made of steel with the thickness of 1.6 to 3.0mm and the tensile strength of 600 to 1000MPa, and the surface of the front fingerboard assembly is coated with a pure zinc or zinc-iron anticorrosive coating; the adapter member is made of steel with the thickness of 1.6-2.5 mm and the tensile strength of 400-800MPa. In this embodiment, the front fingerboard assembly 6 is formed by stamping a hot-dip galvanized high-strength steel plate with a thickness of 2.0mm, a tensile strength of 600MPa and a tensile strength of 50/50g to obtain an inner sheet and an outer sheet, and the formed inner sheet and the formed outer sheet are welded together by spot welding to form an approximately square cavity.
A post roof side rail 123 front portion is buckled down and is formed vertical section, this vertical section lower extreme is fixed with A post body 121 upper end overlap joint, be about to overlap joint line 14 sets up on A post body 121, effectively utilize the cross sectional dimension advantage of A post body 121 itself, overlap joint area and solder joint quantity have been increased, this regional atress structure and deformation form have been improved, it sets up current overlap joint line 15 in tiny A post roof side rail 123 to have avoided traditional overlap joint form, the overlap joint district of current overlap joint mode can become the weakest point of frontal collision, often can cause the experimental failure of frontal collision, be unfavorable for passenger cabin security.
The adapter member 7 is formed by punching, welding and combining two-piece steel plates and comprises an upper member 71 and a lower member 72, wherein the adapter member 7 is made of high-strength structural steel, low-alloy high-strength steel or dual-phase steel with the thickness of 1.6-2.5 mm and the tensile strength of 400-800MPa. In this embodiment, the upper member 71 and the lower member 72 are both made of high-strength structural steel having a thickness of 2.0mm and a tensile strength of 600 MPa. The switching component 7 is connected and combined with the front longitudinal beam assembly and the front fingerboard assembly 6 into a whole through a spot welding process
The outer side face of the rear part of the adapter component 7 is an inclined face, an included angle alpha between the inclined face and the axis of the front longitudinal beam assembly is 15-85 degrees, a stable triangular structure form is formed, and different force transmission levels and energy absorption effects can be achieved by adjusting the included angle alpha. In the present embodiment, the angle α is set to 40 °.
In a small offset collision, the collision barrier 13 is located at a 25% offset position of the entire vehicle. The collision barrier 13 is pushed towards the direction of the vehicle body under the test simulation or the real vehicle working condition, firstly contacts with an extension part which is designed on the front collision-prevention cross beam 1 and extends towards the side surface of the vehicle, and transmits the collision stress to the first energy absorption box 2, and the first energy absorption box 2 sets different lengths and section sizes according to the conditions of the weight, the speed and the like of a platform vehicle model at extremely low cost, so that the adaptation to different collision working conditions is realized. The collision energy to be transmitted by the front-side member assembly is set by optimizing the overlap ratio of the front-side member front section 4 to the test collision barrier 13, and the overlap ratio of the two is set to be either completely overlapped, or not overlapped at all, or overlapped at a ratio. Partial energy is continuously transmitted to the front longitudinal beam rear section 5 through the front longitudinal beam front section 4 and is decomposed to two sides through the transmission guide and structure reinforcing module, namely the partial energy is decomposed to the front floor longitudinal beam 9 and the threshold side beam 11 on the left side and the right side of the rear part of the front longitudinal beam assembly through the bracket 8 and the lining plate 10, and the stress path mainly bears the residual energy of the first energy absorption box 2 in small offset collision and does not influence the main body framework of the whole vehicle.
The front anti-collision cross beam 1 is provided with a certain radian to guide collision energy and a force transmission path to avoid a front longitudinal beam front section 4 of a vehicle body main structure, the collision barrier 13 continues to be propelled towards the vehicle body direction after being impacted and absorbed by the first energy absorption box 2, main residual collision energy is in contact with the second energy absorption box 3 to absorb partial energy, and the second energy absorption box 3 is designed into different structures and forms according to the energy. After passing through the second energy-absorbing box 3, the collision barrier 13 continuously collides with the front fingerboard assembly 6 and the adapter member 7, the front fingerboard assembly 6 transmits the impact energy to the A-pillar assembly 12, and the adapter member 7 transmits part of the energy to the front longitudinal beam front section 4. In the invention, the reinforcing part 122 is arranged in the A-pillar body 121 to bear the impact energy caused by the backward movement of the front wheel during collision, thereby protecting the structural integrity and safety of the passenger compartment. Referring to fig. 6, the residual impact energy after deformation and absorption of the front fingerboard (106) and the impact energy transmitted by the front wheel are received by the a-pillar body 121 and the reinforcement 122 and transmitted to the a-pillar roof side rail 123 and the threshold side rail 11, and at this time, the energy decomposition is completed, and the passenger compartment is safe and complete.
A vehicle comprises the vehicle body system for improving the small offset collision performance.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention.
Claims (10)
1. The utility model provides a promote automobile body system and vehicle of little offset crash performance which characterized in that: the front anti-collision beam assembly comprises a front anti-collision beam assembly, a front longitudinal beam assembly, a front fingerboard assembly (6) and a switching component (7), wherein the front anti-collision beam assembly comprises a front anti-collision cross beam (1), first energy absorption boxes (2) fixed on the rear sides of the left and right parts of the front anti-collision cross beam (1) and second energy absorption boxes (3) connected to the outer sides of the first energy absorption boxes (2), the left and right end parts of the front anti-collision cross beam (1) extend outwards to form extension parts, and the extension parts are positioned in front of the second energy absorption boxes (3); the front end of the front longitudinal beam assembly is connected with the rear end of the first energy absorption box (2), the inner side of the rear part of the front longitudinal beam assembly is connected with a front floor longitudinal beam (9) through a bracket (8), and the inner side of the rear part of the front longitudinal beam assembly is connected with a threshold side beam (11) through a lining plate (10); the front end of the front fingerboard assembly (6) is connected with the second energy absorption box (3), the inner side of the front end of the front fingerboard assembly (6) is fixedly connected with the outer side of the front longitudinal beam assembly into a whole through a switching component (7), the rear end of the front fingerboard assembly (6) is connected with an A column assembly (12), and the lower end of the A column assembly (12) is connected with a threshold boundary beam (11).
2. The vehicle body system for improving small offset crash performance of claim 1, wherein: the front anti-collision beam (1) is made of aluminum alloy extruded sections, steel plates through stamping and welding, ultra-high strength steel rolling or hot forming steel;
the first energy absorption box (2) is made by stamping a steel plate with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 600MPa;
the second energy absorption box (3) is made of dual-phase steel with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 600MPa.
3. The vehicle body system for improving small offset collision performance according to claim 1 or 2, characterized in that: the front longitudinal beam assembly comprises a front longitudinal beam front section (4) and a front longitudinal beam rear section (5), wherein the front longitudinal beam front section (4) is manufactured by stamping a steel plate with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 1000MPa, and the surface of the steel plate is coated with a pure zinc or zinc-iron anticorrosive coating; the front longitudinal beam rear section (5) is made of hot forming steel with the thickness of 2.0-3.0 mm and the tensile strength of 1500-2000 MPa, and an Al-Si protective coating is coated on the surface.
4. The vehicle body system for improving small offset collision performance according to claim 1 or 2, characterized in that: the A column assembly (12) comprises an A column body (121), a reinforcing piece (122) connected to the A column body (121) and an A column upper beam (123) in lap joint with the upper end of the A column body (121), wherein the A column body (121) is stamped by a high-strength steel plate with the thickness of 1.4 to 2.4mm and the tensile strength of 800 to 1200MPa, or is stamped by hot-formed steel with the thickness of 1.4 to 2.4mm and the tensile strength of 1500 to 2000MPa, and an Al-Si protective coating is protected on the surface;
the reinforcing piece (122) is made by stamping a high-strength steel plate with the thickness of 1.2 to 2.0mm and the tensile strength of 600 to 1000MPa or is made by a nylon framework and a high-strength filling colloid;
the A-column upper edge beam (123) is made by punching an ultrahigh-strength steel plate with the thickness of 1.2-2.4 mm and the tensile strength of 1200MPa, or is made by hot forming steel with the thickness of 1.2-2.4 mm and the tensile strength of 1500-2000 MPa.
5. The vehicle body system and the vehicle for improving the small offset collision performance according to claim 4, wherein: the front part of the A-column upper side beam is bent downwards to form a vertical section, and the lower end of the vertical section is fixedly connected with the upper end of the A-column body in an overlapping manner.
6. The vehicle body system for improving small offset collision performance according to claim 1 or 2, characterized in that: the front anti-collision beam is an arc protruding towards the front, and the radius of the arc is 1000-3000 mm.
7. The vehicle body system for improving small offset collision performance according to claim 1 or 2, characterized in that: the outer side face of the rear part of the adapter component is an inclined plane, and an included angle between the inclined plane and the axis of the front longitudinal beam assembly is 15-85 degrees.
8. The vehicle body system for improving small offset collision performance according to claim 1 or 2, characterized in that: the threshold side beam (11) is made of hot formed steel with the thickness of 1.2-2.0 mm and the tensile strength of 1500-2000 MPa, or is made of dual-phase steel with the thickness of 1.2-2.0 mm and the tensile strength of 1200MPa through rolling or rolling and stamping mixed technology;
the bracket (8) and the lining plate (10) are made of steel with the thickness of 1.5 to 3.0mm and the tensile strength of 400 to 600MPa.
9. The vehicle body system for improving small offset collision performance according to claim 1 or 2, characterized in that: the front fingerboard assembly (6) is made of steel with the thickness of 1.6 to 3.0mm and the tensile strength of 600 to 1000MPa, and the surface of the front fingerboard assembly is coated with a pure zinc or zinc-iron anticorrosive coating; the adapter member is made of steel with the thickness of 1.6 to 2.5mm and the tensile strength of 400 to 800MPa.
10. A vehicle, characterized in that: the vehicle body system for improving the small offset collision performance, which comprises the vehicle body system as claimed in any one of claims 1 to 9.
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