CN115649098B - Vehicle body system and vehicle for improving small offset collision performance - Google Patents
Vehicle body system and vehicle for improving small offset collision performance Download PDFInfo
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Abstract
The invention discloses a vehicle body system for improving small offset collision performance and a vehicle, which comprise a front anti-collision beam assembly, a front longitudinal beam assembly, a front fingerboard assembly and a switching member, wherein the front anti-collision beam assembly comprises a front anti-collision beam, a first energy-absorbing box fixed on the rear sides of the left part and the right part of the front anti-collision beam and a second energy-absorbing box connected on the outer side of the first energy-absorbing box, the left end part and the right end part of the front anti-collision beam extend outwards to form an extension part, and the extension part is positioned in front of the second energy-absorbing box; 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 a 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 the A column assembly, and the lower end of the A column assembly is connected with the threshold boundary beam. The deformation of the passenger cabin can be reduced, and the front small-offset collision performance requirement 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 not only an important functional carrier of the whole automobile, but also a safety fort for protecting passengers and pedestrians. With the continuous upgrading of various global safety standards and the implementation of various safety evaluation standards based on the benefit consideration of the insurance industry, the safety evaluation of the traditional automobile body is adversely affected. In the safety collision test of automobiles, especially, the front 25% small offset collision has the most serious challenge on the safety performance of the automobile body, namely, the collision load energy of the whole automobile is loaded on 25% of the automobile body structure, and the impacted area bears 4 times of energy equivalent to the normal working condition, so that the safety collision test has a great challenge on the performance of the automobile body structure.
At present, in order to cope with the increasingly severe offset collision requirements, each automobile factory mainly adopts a mode of locally reinforcing the patch on the basis of the original automobile body design scheme, and a plurality of reinforcing or buffering brackets are added at the later stage to improve the local stress form, so as to cope with the crash test, lack of systematic safety design, and can not basically improve the safety performance of offset collision, thereby being very unfavorable for the safety of the whole automobile.
Therefore, the invention provides the automobile front small offset collision safety automobile body system, which systematically improves the safety collision performance of the whole automobile, is well adapted to the current mainstream manufacturing implementation mode of an automobile factory, 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 cabin and meet the requirement of the front small-offset collision performance.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
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 fingerboard assembly and a switching component, wherein the front anti-collision beam assembly comprises a front anti-collision beam, a first energy absorption box fixed on the rear sides of the left part and the right part of the front anti-collision beam and a second energy absorption box connected to the outer side of the first energy absorption box, the left end part and the right end part of the front anti-collision beam extend outwards to form an extension part, and the extension part is positioned in front of the second energy absorption box; 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 a sill 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 the A column assembly, and the lower end of the A column assembly is connected with a threshold boundary beam.
Further, the front anti-collision cross beam is made of aluminum alloy extruded profiles, steel plates, ultra-high strength steel, rolling or hot forming steel; the first energy absorption box is manufactured by stamping a steel plate with the thickness of 1.5-3.0 mm and the tensile strength of 400-600 MPa; the second energy absorption box is made of dual-phase steel with the thickness of 1.5-3.0 mm and the tensile strength of 400-600 MPa.
The front longitudinal beam assembly comprises a front longitudinal beam front section and a front longitudinal beam rear section, wherein the front longitudinal beam front section is manufactured by stamping a steel plate with the thickness of 1.5-3.0 mm and the tensile strength of 400-1000 MPa, and the surface of the front longitudinal beam front section is coated with a pure zinc or zinc-iron anti-corrosion coating; the rear section of the front longitudinal beam is made of hot formed steel with the thickness of 2.0-3.0 mm and the tensile strength of 1500-2000 MPa, and the surface of the front longitudinal beam is coated with an Al-Si protective coating;
Further, the A column assembly comprises an A column body, a reinforcing piece connected to the A column body and an A column upper edge 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 1.4-2.4 mm and the tensile strength of 800-1200 MPa, or is manufactured by stamping a hot forming steel with the thickness of 1.4-2.4 mm and the tensile strength of 1500-2000 MPa, and the surface of the A column body is protected by an Al-Si protection coating; the reinforcing piece is manufactured by stamping a high-strength steel plate with the thickness of 1.2-2.0 mm and the tensile strength of 600-1000 MPa, or is manufactured by adopting a nylon framework and a high-strength filling rubber body; the A column upper side beam is manufactured by stamping an ultra-high strength steel plate with the thickness of 1.2-2.4 mm and the tensile strength of 1200MPa, or is manufactured by hot forming steel with the thickness of 1.2-2.4 mm and the tensile strength of 1500-2000 MPa.
Further, the front part of the upper boundary beam of the A column is downwards bent to form a vertical section, and the lower end of the vertical section is fixedly overlapped with the upper end of the A column body.
Further, the front anti-collision cross beam is in an arc shape protruding towards the front, and the radius of the arc is 1000-3000 mm.
Further, the outer side face of the rear part of the switching component is an inclined face, and an included angle between the inclined face 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 1.2-2.0 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 by 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 400-600 MPa.
Further, the front fingerboard assembly is made of steel with the thickness of 1.6-3.0 mm and the tensile strength of 600-1000 MPa, and the surface of the front fingerboard assembly is coated with a pure zinc or zinc-iron anti-corrosion coating; the switching component is made of steel with the thickness of 1.6-2.5 mm and the tensile strength of 400-800 MPa.
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 part and the right end part of the front anti-collision beam extend outwards to form an extension part, the extension part is positioned in front of the second energy absorption box, and then the front anti-collision beam is contacted with the collision barrier in small offset collision, collision energy is absorbed by the first energy absorption box and then transmitted and guided to the front longitudinal beam assembly, and the front floor longitudinal beams and the threshold boundary beams on the left side and the right side of the rear part of the front longitudinal beam assembly are decomposed through the bracket and the lining plate, so that the path mainly bears the residual energy of the first energy absorption box, and the influence on the whole main body framework is avoided. After the collision barrier collides with and absorbs the first energy absorption box, the collision barrier continues to push towards the direction of the vehicle body, and the main residual collision energy contacts with the second energy absorption box to absorb part of energy. After the collision barrier passes through the second energy absorption box, the collision barrier continuously collides with the front fingerboard assembly and the switching component, the front fingerboard assembly transmits collision energy to the A-pillar assembly, and the switching component transmits partial 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 cabin is avoided, and the front small offset collision performance requirement is met.
2. The invention limits the specific use materials of each part, reduces the cost investment on the premise of ensuring the economic benefit, and effectively ensures the small offset collision performance of the vehicle body system.
3. The car body system for improving the small offset collision performance can realize the platform application, can be transplanted and copied on different platforms, is suitable for car safety systems with different complexity degrees, and can be iterated continuously along with the upgrading of the platforms.
Drawings
FIG. 1 is a schematic view of a vehicle body system for improving the performance of a small offset collision according to the present invention;
FIG. 2 is a side view of a vehicle body system of the present invention for enhancing the performance of a small offset collision;
FIG. 3 is a schematic view of the front bumper beam of the present invention;
FIG. 4 is a schematic view of the construction 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 the A-pillar assembly of 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 front section, 5-front longitudinal beam rear section, 6-front finger beam assembly, 7-switching component, 71-upper component, 72-lower component, 8-brackets, 9-front floor stringers, 10-liners, 11-rocker side rails, 12-A pillar assemblies, 121-A pillar bodies, 122-reinforcements, 123-A pillar roof side rails, 13-collision barriers, 14-lap joints, 15-existing lap joints.
Detailed Description
Further advantages and effects of the present invention will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may 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 fingerboard assembly 6 and a switching member 7, wherein the front anti-collision beam assembly comprises a front anti-collision beam 1, a first energy absorption box 2 fixed on the rear sides of the left part and the right part of the front anti-collision beam 1, and a second energy absorption box 3 connected on the outer side of the first energy absorption box 2, the left end part and the right end part of the front anti-collision beam 1 extend outwards to form an extension part, and the extension part is positioned in front of the second energy absorption box 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 the 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 boundary 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 the A column assembly 12, and the lower end of the A column assembly 12 is connected with the threshold boundary beam 11.
Referring to fig. 3, the front anti-collision beam 1 is in an arc shape protruding towards the front, the radius of the arc is 1000-3000 mm, and the guiding function of the extension part on the impact force in different degrees is realized by adjusting the radius parameter of the arc. The front anti-collision beam 1 is made of aluminum alloy extruded profiles, steel plates, ultra-high strength steel, rolled or thermoformed steel. In the embodiment, the front anti-collision beam 1 adopts an ultra-high strength steel rolling mode with comprehensive balance of cost and performance, adopts dual-phase steel with thickness of 2.4mm and tensile strength of 1200MPa, ensures higher strength, reduces weight and cost, has excellent extensibility, avoids brittle failure risk caused by lower extensibility of martensitic steel or hot forming steel, and obtains the front anti-collision beam 1 through a manufacturing process of welding after rolling.
The first energy absorption box 2 is manufactured by stamping a steel plate with the thickness of 1.5-3.0 mm and the tensile strength of 400-600 MPa; the second energy absorption box 3 is made of dual-phase steel with the thickness of 1.5-3.0 mm and the tensile strength of 400-600 MPa, and the size is determined according to the simulation analysis of collision energy absorption CAE. In the embodiment, the first energy absorption 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 crumple deformation performance, and absorbs 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 at the rear side through a welding process. The second energy-absorbing box 3 is made of dual-phase steel with the thickness of 2.0mm and the tensile strength of 600MPa, the external dimension is wide, high, long=110 mm, 110mm and 50mm, and the second energy-absorbing box 3 is fixedly connected with the first energy-absorbing 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 stamping a steel plate with the thickness of 1.5-3.0 mm and the tensile strength of 400-1000 MPa, and the surface of the steel plate is coated with a pure zinc or zinc-iron anti-corrosion 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 the surface of the front longitudinal beam rear section is coated with an Al-Si protective coating. In the embodiment, the front longitudinal beam front section 4 is punched and pressed by hot dip galvanized high-strength steel plates with the thickness of 2.5mm, the tensile strength of 800MPa and 50/50g, and the front longitudinal beam front section 4 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 formed 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 reinforcing member 122 connected to the a-pillar body 121, and an a-pillar upper edge beam 123 overlapping with the upper end of the a-pillar body 121, where the a-pillar body 121 is made by stamping a high-strength steel plate with a thickness of 1.4-2.4 mm and a tensile strength of 800-1200 mpa, or by stamping a hot forming steel with a thickness of 1.4-2.4 mm and a tensile strength of 1500-2000 mpa, and the surface is protected by an Al-Si protection coating. The reinforcing piece 122 is manufactured by stamping a high-strength steel plate with the thickness of 1.2-2.0 mm and the tensile strength of 600-1000 MPa, or is manufactured by adopting a nylon framework and a high-strength filling rubber body. The A-pillar upper edge beam 123 is manufactured by stamping an ultra-high strength steel plate with the thickness of 1.2-2.4 mm and the tensile strength of 1200MPa, or is manufactured by hot forming steel with the thickness of 1.2-2.4 mm and the tensile strength of 1500-2000 MPa. In this embodiment, the A-pillar roof rail 123 is made of a heat-formed steel having a thickness of 2.0mm and a tensile strength of 1500MPa, and is corrosion-protected 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 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 by 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 400-600 MPa. The threshold side 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 1.6-3.0 mm and the tensile strength of 600-1000 MPa, and the surface of the front fingerboard assembly is coated with a pure zinc or zinc-iron anti-corrosion coating; the switching component is made of steel with the thickness of 1.6-2.5 mm and the tensile strength of 400-800 MPa. 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 piece and an outer piece, and the formed inner piece and the formed outer piece are welded into a whole by spot welding, so that an approximately square cavity is formed.
The front portion of the upper side beam 123 of the A column is downwards bent to form a vertical section, the lower end of the vertical section is fixedly overlapped with the upper end of the A column body 121, namely, the lapping wire 14 is arranged on the A column body 121, the advantage of the cross section size of the A column body 121 is effectively utilized, the lapping area and the number of welding spots are increased, the stress structure and the deformation form of the area are improved, the traditional lapping form is avoided that the traditional lapping wire 15 is arranged on the fine upper side beam 123 of the A column, the lapping area of the traditional lapping mode becomes the weakest point of the front collision, the front collision test is often caused to fail, and the safety of a passenger cabin is not facilitated.
The transfer member 7 is formed by punching, welding and combining two sheet steel plates and comprises an upper member 71 and a lower member 72, and the transfer 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 400-800 MPa. In this embodiment, the upper member 71 and the lower member 72 are each made of high-strength structural steel having a thickness of 2.0mm and a tensile strength of 600 MPa. The transfer component 7 is connected and combined with the front longitudinal beam assembly and the front finger beam assembly 6 into a whole through a spot welding process
The outer side surface of the rear part of the switching member 7 is an inclined surface, an included angle alpha between the inclined surface and the axis of the front longitudinal beam assembly is 15-85 degrees, a stable triangular structural form is formed, and different force transmission levels and energy absorption effects can be realized by adjusting the included angle alpha. In this embodiment, the included angle α is set to 40 °.
In a small offset crash, the crash barrier 13 is in the 25% offset position of the vehicle. The collision barrier 13 is pushed to the direction of the vehicle body by test simulation or real vehicle working conditions, is contacted with an extension part which is designed by the front anti-collision cross beam 1 and extends to the side surface of the vehicle, transmits 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 weight, the speed and other conditions of a platform vehicle model at extremely low cost, so that the adaptation to different collision working conditions is realized. By optimizing the overlapping ratio of the front side member front section 4 and the test crash barrier 13, the crash energy that the front side member assembly needs to transmit is set, and the overlapping ratio of the two is set to be completely overlapping, or not overlapping at all, or overlapping at the ratio in the present invention. Part of 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 front floor longitudinal beam 9 and the threshold boundary beam 11 on the left side and the right side of the rear part of the front longitudinal beam assembly are decomposed 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, so that the influence on the whole main body framework is avoided.
The front anti-collision beam 1 is provided with a certain radian, collision energy and a force transmission path are guided to avoid the front longitudinal beam front section 4 of the main body structure of the vehicle body, the collision barrier 13 continues to push towards the direction of the vehicle body after being impacted and absorbed by the first energy absorption box 2, main residual collision energy is contacted with the second energy absorption box 3, part of energy is absorbed, and the second energy absorption box 3 is designed into different structures and forms according to the energy size. After passing through the second energy absorption box 3, the collision barrier 13 continuously collides with the front fingerboard assembly 6 and the switching member 7, the front fingerboard assembly 6 transmits collision energy to the A-pillar assembly 12, and the switching member 7 transmits part of energy to the front longitudinal beam front section 4. In the invention, the reinforcing piece 122 is arranged in the A column body 121 to receive impact energy caused by collision and backward movement of the front wheels, so that the structural integrity and safety of the passenger cabin are protected. Referring to fig. 6, the residual impact energy after deformation and absorption of the front fingerboard (106) and the impact energy transmitted from the front wheels are received through the a-pillar body 121 and the reinforcement 122 and transmitted to the a-pillar roof side rail 123 and the rocker 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 explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention.
Claims (10)
1. A vehicle body system for improving small offset crash performance, comprising: the front anti-collision beam 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 beam (1), a first energy absorption box (2) fixed on the rear sides of the left part and the right part of the front anti-collision beam (1) and a second energy absorption box (3) connected to the outer side of the first energy absorption box (2), the left end part and the right end part of the front anti-collision beam (1) extend outwards to form an extension part, and the extension part is positioned in front of the second energy absorption box (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 outer side of the rear part of the front longitudinal beam assembly is connected with a threshold boundary 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 the A column assembly (12), and the lower end of the A column assembly (12) is connected with the threshold boundary beam (11);
the second energy-absorbing box (3) is fixedly connected with the first energy-absorbing box (2) through a spot welding process, during small offset collision, the collision barrier (13) is contacted with an extension part formed by outwards extending the left end part and the right end part of the front anti-collision beam (1) and transmits collision stress to the first energy-absorbing box (2), and after the collision barrier (13) is impacted and absorbed by the first energy-absorbing box (2), the main residual collision energy is continuously pushed towards the vehicle body direction, contacts with the second energy-absorbing box (3) and absorbs part of energy.
2. The vehicle body system for improving small offset crash performance of claim 1 wherein: the front anti-collision cross beam (1) is made of aluminum alloy extruded profiles, steel plates, ultra-high strength steel, rolling or hot forming steel;
the first energy absorption box (2) is manufactured by stamping a steel plate with the thickness of 1.5-3.0 mm and the tensile strength of 400-600 MPa;
the second energy absorption box (3) is made of dual-phase steel with the thickness of 1.5-3.0 mm and the tensile strength of 400-600 MPa.
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 1.5-3.0 mm and the tensile strength of 400-1000 MPa, and the surface of the steel plate is coated with a pure zinc or zinc-iron anti-corrosion 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 the surface of the front longitudinal beam rear section is coated with an Al-Si protective coating.
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 edge beam (123) overlapped with the upper end of the A column body (121), wherein the A column body (121) is manufactured by stamping a high-strength steel plate with the thickness of 1.4-2.4 mm and the tensile strength of 800-1200 MPa, or is manufactured by stamping a hot forming steel with the thickness of 1.4-2.4 mm and the tensile strength of 1500-2000 MPa, and the surface of the A column body is protected by an Al-Si protection coating;
The reinforcing piece (122) is manufactured by stamping a high-strength steel plate with the thickness of 1.2-2.0 mm and the tensile strength of 600-1000 MPa, or is manufactured by adopting a nylon framework and a high-strength filling colloid;
The A column upper edge beam (123) is manufactured by stamping an ultra-high strength steel plate with the thickness of 1.2-2.4 mm and the tensile strength of 1200MPa, or is manufactured 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 for improving small offset crash performance of claim 4 wherein: the front part of the upper boundary beam of the A column is downwards bent to form a vertical section, and the lower end of the vertical section is fixedly overlapped with the upper end of the A column body.
6. The vehicle body system for improving small offset collision performance according to claim 1 or 2, characterized in that: the front anti-collision cross beam is in an arc shape protruding forwards, 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 surface of the rear part of the switching component is an inclined surface, and the included angle between the inclined surface 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 forming 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 by a rolling or rolling and stamping mixed process;
The bracket (8) and the lining plate (10) are made of steel with the thickness of 1.5-3.0 mm and the tensile strength of 400-600 MPa.
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 1.6-3.0 mm and the tensile strength of 600-1000 MPa, and the surface of the front fingerboard assembly is coated with a pure zinc or zinc-iron anti-corrosion coating; the switching component is made of steel with the thickness of 1.6-2.5 mm and the tensile strength of 400-800 MPa.
10. A vehicle, characterized in that: a vehicle body system comprising the small offset crash feature of any one of claims 1-9.
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