CN115783058A

CN115783058A - Steel-aluminum mixed material B stand column assembly and automobile

Info

Publication number: CN115783058A
Application number: CN202211162605.1A
Authority: CN
Inventors: 胡军; 王珂; 陈强; 陈宇
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-03-14

Abstract

The invention belongs to the technical field of safe driving of automobiles, and particularly relates to a steel-aluminum mixed material B stand column assembly, which comprises a B stand column inner plate assembly and a B stand column reinforcement assembly fixedly arranged on the B stand column inner plate assembly, wherein the B stand column reinforcement assembly comprises a B stand column reinforcement and an aluminum alloy anti-collision beam assembly, the aluminum alloy anti-collision beam assembly comprises an aluminum alloy anti-collision beam which is arranged in a bending mode, the aluminum alloy anti-collision beam is fixedly arranged on the B stand column reinforcement, the aluminum alloy anti-collision beam is formed by bending a section extrusion aluminum profile, the section of the aluminum alloy anti-collision beam is in a hollow self-closed mode, the elongation of the lower end of the B stand column inner plate assembly is larger than the elongation of the upper end of the B stand column inner plate assembly, and the yield strength of the lower end of the B stand column inner plate assembly is smaller than the yield strength of the upper end of the B stand column inner plate assembly. The purpose is as follows: the method is used for meeting the requirements of the latest version of Chinese new vehicle evaluation code (C-NCAP) on the side collision performance and balancing multiple indexes such as performance, weight, cost and the like.

Description

Steel-aluminum mixed material B stand column assembly and automobile

Technical Field

The invention belongs to the technical field of safe driving of automobiles, and particularly relates to a steel-aluminum mixed material B stand column assembly and an automobile.

Background

The Chinese utility model patent (publication number: CN 201989859U) discloses a B pillar structure of an automobile. The B upright post assembly structure is composed of an outer plate and an inner plate, a plurality of reinforcing pieces are vertically arranged between the outer plate and the inner plate, the mechanical strength of the positions below the H point of the automobile corresponding to the hip position of a human body is weakened by the reinforcing pieces, the mechanical strength of the positions above the H point corresponding to the chest and the abdomen of the human body is strengthened, and the safety of the main part of the human body, the chest and the abdomen can be ensured. The B-pillar assembly structure in the prior art can play a role in supporting and absorbing energy for a passenger compartment when a side collision occurs to an automobile, plays an important role in reducing the intrusion speed of an automobile body into the automobile when the automobile body deforms, reducing the intrusion amount of the automobile structure into the automobile, ensuring the safety of drivers and passengers in the passenger compartment and the like, and is a good solution for the side collision of the automobile in the current version of the Chinese new automobile evaluation code (C-NCAP).

The problems that exist are that: with the increasing demands of consumers on automobile safety and the tightening of crash regulations, the background art has been unable to meet the increasingly stringent performance requirements for side impact testing. The test conditions for the side collision of the automobile in the latest version of Chinese New vehicle evaluation code (C-NCAP) are adjusted, compared with the existing evaluation code, the weight of the side collision barrier is increased from 1400kg to 1700kg, the impact speed of the barrier is increased from 50km/h to 60km/h, and the impact energy of the side collision is increased by about 75 percent. Meanwhile, the height of the barrier in side collision from the ground is increased by 50mm, and the width of the barrier is increased by 115mm, so that when a vehicle is subjected to a side collision test, compared with the prior test mode, a doorsill structure of the vehicle cannot be in contact with the barrier, and the collision area of the barrier is completely concentrated in a B column structure and a door area of the vehicle, and the capability of a B column assembly structure for bearing collision energy must be improved from the design aspect of a vehicle body structure.

The structural strength of the B upright post assembly is improved in a mode of increasing the size of a cavity of the B upright post assembly and is difficult to realize due to the limitation of the sizes of the front door frame opening and the rear door frame opening and the requirements of the in-and-out space of the door frame; for the prior art, the strength of the B-column assembly structure is required to be greatly improved, the number of reinforcing parts is increased, the material grade of parts is improved, and the material thickness of the parts is improved in a limited B-column cavity structure, so that the overall weight and the part cost of the B-column assembly are increased undoubtedly, and the trend of the whole vehicle light weight is against that. Therefore, how to find a novel B-pillar assembly structure meets the requirements of the latest version of the chinese new car evaluation code (C-NCAP) on the side collision performance, and at the same time, balances multiple indexes such as performance, weight, cost, and the like, is an important issue that needs to be solved in the front of the car body design engineer.

Disclosure of Invention

The purpose of the invention is: the steel-aluminum mixed material B column assembly and the automobile are provided, and the steel-aluminum mixed material B column assembly and the automobile are used for meeting the requirements of the latest version of Chinese new automobile evaluation code (C-NCAP) on the side collision performance and balancing multiple indexes such as performance, weight, cost and the like.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a mixed material B stand assembly of steel aluminium, includes B stand inner panel assembly and the B stand reinforcement assembly of fixed mounting on B stand inner panel assembly, B stand reinforcement assembly includes B stand reinforcement and aluminum alloy anticollision roof beam assembly, aluminum alloy anticollision roof beam assembly is including the aluminum alloy anticollision roof beam of crooked setting, aluminum alloy anticollision roof beam fixed mounting is on B stand reinforcement, aluminum alloy anticollision roof beam extrudes the aluminium alloy shaping of buckling for the cross-section, the cross-section of aluminum alloy anticollision roof beam is hollow from the closed form, the percentage of elongation of B stand inner panel assembly lower extreme is greater than the percentage of elongation of B stand inner panel assembly upper end, the yield strength of B stand inner panel assembly lower extreme is less than the yield strength of B stand inner panel assembly upper end.

Further limit, the inside of aluminum alloy anticollision roof beam vertically is provided with the strengthening rib that link up. Such structural design through the strengthening rib for aluminum alloy anticollision roof beam is from structural a plurality of independent cavitys that have, and this kind of structural style can promote aluminum alloy anticollision roof beam self structural strength, and it has sufficient intensity to resist external impact force in the earlier stage of side collision process of being convenient for, and the structure of multicavity simultaneously also is convenient for its later stage absorbed energy in side collision process, plays the effect of energy-absorbing buffering.

Further limiting, the number of the reinforcing ribs is two, and the cross section of the aluminum alloy anti-collision beam is in a shape like a Chinese character 'mu'.

Further inject, aluminum alloy anticollision roof beam assembly still includes a plurality of fixed mounting on aluminum alloy anticollision roof beam's connecting piece, connecting piece and B stand reinforcement fixed connection. Such structural design, aluminum alloy anticollision roof beam passes through connecting piece and B stand reinforcement fixed connection, simple structure, simple to operate.

Further defined, the aluminum alloy impact beam and the connecting piece are connected through cold metal transition CMT welding.

Further define, B stand reinforcement assembly still includes the B stand reinforcement tang limit that is located B stand reinforcement both sides, and with B stand reinforcement integrated into one piece, connecting piece and B stand reinforcement tang limit fixed connection. According to the structural design, the connecting piece is fixedly connected with the spigot edge of the B upright post reinforcing piece in a matched mode, the aluminum alloy anti-collision beam is fixedly connected with the connecting piece, and the aluminum alloy anti-collision beam is fixedly connected with the B upright post reinforcing piece.

Further, the connecting piece is connected with the spigot edge of the B column reinforcing piece through self-piercing riveting SPR.

Further inject, the connecting piece is four, and the symmetry lays in the both sides of aluminum alloy anticollision roof beam, the connecting piece is the L type.

Further inject, B stand reinforcement assembly still including be located B stand reinforcement both sides, and with B stand reinforcement integrated into one piece's B stand reinforcement tang limit, B stand inner panel assembly both sides still integrated into one piece have B stand inner panel assembly tang limit, B stand reinforcement tang limit and B stand inner panel assembly tang limit spot welding are connected. Such structural design is connected through the spot welding on B stand reinforcement tang limit and B stand inner panel assembly tang limit, accomplishes the fixed connection of B stand reinforcement assembly and B stand inner panel assembly for B stand inner panel assembly and B stand reinforcement assembly form overall structure, simple process, and processing is convenient, and the practicality is stronger.

Further limiting, the upper end of the B pillar inner plate assembly is a B pillar upper inner plate, the lower end of the B pillar inner plate assembly is a B pillar lower inner plate, the elongation of the B pillar lower inner plate is greater than that of the B pillar upper inner plate, and the yield strength of the B pillar lower inner plate is less than that of the B pillar upper inner plate. Such structural design is through being the inner panel under B stand inner panel and the B stand inner panel on B stand inner panel assembly split to cast respectively, after the casting is accomplished, the rewelding is on B stand reinforcement, and it is more convenient to make, and the practicality is stronger.

Further inject, inner panel lower extreme is equipped with B stand upper inner panel lower connecting portion on the B stand, B stand lower inner panel upper end is equipped with B stand upper inner panel upper junction, lower inner panel upper junction is connected with upper inner panel lower connecting portion, just is located upper inner panel lower connecting portion and keeps away from B stand reinforcement one side. By the structural design, the upper inner plate of the B stand column and the lower inner plate of the B stand column are in lap joint through the upper inner plate lower connecting part of the B stand column and the upper connecting part of the lower inner plate of the B stand column, and the structure is simple and the installation is convenient.

The utility model provides an automobile, includes side wall roof side rail inner panel, threshold boundary beam inner panel, side wall roof side rail planking, threshold boundary beam planking and foretell steel-aluminum mixed material B stand assembly, B stand inner panel assembly upper end is equipped with inner panel upper junction on the B stand, side wall roof side rail inner panel is connected with upper inner panel upper junction, B stand inner panel assembly lower extreme is equipped with inner panel lower junction under the B stand, threshold boundary beam inner panel is connected with lower inner panel lower junction, B stand reinforcement includes connecting portion and connecting portion under reinforcing plate on the reinforcing plate, connecting portion are connected on side wall roof side rail planking and the reinforcing plate, connecting portion are connected under threshold boundary beam planking and the reinforcing plate.

The invention adopting the technical scheme has the following advantages:

1. the aluminum alloy anti-collision beam with the self-closed cross section is arranged in the B stand column assembly with the limited cavity size, so that a plurality of sheet metal reinforcement structures in the cavity of the B stand column assembly are replaced, the lap joint matching structure between parts in the cavity of the B stand column assembly is simplified, the weight balance is optimized, the side collision performance of the B stand column assembly can be greatly improved, meanwhile, the aluminum alloy anti-collision beam is used for replacing the reinforcement of the sheet metal structure, the light weight effect is obvious, and compared with the scheme that the section size of the B stand column assembly is increased on the basis of the prior art, the number of the reinforcement in the cavity of the B stand column assembly is increased, and the material grade or the material thickness of each component part of the B stand column assembly is improved, the invention has the advantages of simple structure, high performance improvement range, obvious overall weight and cost advantages and the like;

2. different yield strengths and different elongations are adopted for the upper end and the lower end of the B upright post inner plate assembly, so that the soft and hard partition of the B upright post assembly in the vertical direction is realized, namely, the lower end of the B upright post inner plate assembly is made of a material with a slightly higher elongation according to the simulation result, so that the B upright post assembly preferentially deforms and absorbs energy corresponding to the area below the H point of the whole vehicle in the side collision process, and the impact energy to the part above the H point is reduced; the upper end of the B upright post inner plate assembly is made of a material with slightly high yield strength according to the simulation result, so that the deformation resistance of the B upright post assembly corresponding to the area above the H point of the whole vehicle is enhanced in the side collision process, the deformation invasion amount of the area above the H point of the B upright post assembly is reduced, and the injury of side collision to passengers in the vehicle is reduced as much as possible;

3. the aluminum alloy anti-collision beam is structurally provided with the independent cavities through the reinforcing ribs, the structural form can improve the structural strength of the aluminum alloy anti-collision beam, the aluminum alloy anti-collision beam is convenient to have enough strength to resist external collision force in the early stage of the side collision process, and meanwhile the multi-cavity structure is also convenient to absorb energy in the later stage of the side collision process, so that the energy absorption and buffering effects are achieved;

4. the connecting piece is fixedly connected with the spigot edge of the B upright post reinforcement and is matched with the fixed connection of the aluminum alloy anti-collision beam and the connecting piece, so that the fixed connection of the aluminum alloy anti-collision beam and the B upright post reinforcement is completed;

5. the fixed connection between the B upright post reinforcement piece assembly and the B upright post inner plate assembly is completed through the spot welding connection of the B upright post reinforcement piece spigot edge and the B upright post inner plate assembly spigot edge, so that the B upright post inner plate assembly and the B upright post reinforcement piece assembly form an integral structure, and the method has the advantages of simple process, convenience in processing and higher practicability;

6. the B stand column inner plate assembly is split into a B stand column upper inner plate and a B stand column lower inner plate, casting is respectively carried out, and after casting is finished, the B stand column inner plate assembly is welded on a B stand column reinforcing piece, so that the B stand column inner plate assembly is more convenient to manufacture and has stronger practicability;

7. the upper inner plate of the B stand column and the lower inner plate of the B stand column are in lap joint through the upper inner plate lower connecting part of the B stand column and the upper connecting part of the lower inner plate of the B stand column, and the structure is simple and the installation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following descriptions are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts. Further, in the drawings, like parts are designated with like reference numerals, and the drawings are not drawn to actual scale;

FIG. 1 is a schematic structural view of a steel-aluminum mixed material B pillar assembly and an embodiment of an automobile according to the present invention;

FIG. 2 is a schematic view of an exploded structure of a steel-aluminum mixed material B pillar assembly and a component of an embodiment of an automobile according to the present invention;

FIG. 3 is a schematic structural view of a steel-aluminum mixed material B-pillar assembly and an anti-collision beam assembly part in an embodiment of an automobile according to the present invention;

FIG. 4 isbase:Sub>A schematic cross-sectional view of the cross-section A-A in FIG. 3;

the main element symbols are as follows:

an upper inner plate 1 of the B upright post, an upper connecting part 11 of the upper inner plate of the B upright post, a lower connecting part 12 of the upper inner plate of the B upright post,

A B pillar lower inner plate 2, a B pillar lower inner plate upper connecting part 21, a B pillar lower inner plate lower connecting part 22,

A B pillar reinforcement 3, a reinforcement plate upper connecting portion 31, a B pillar reinforcement spigot edge 32, a reinforcement plate lower connecting portion 33,

Aluminum alloy anti-collision beam assembly 4, connecting piece 41, aluminum alloy anti-collision beam 42, reinforcing rib 422,

A B pillar inner plate assembly 5, a B pillar inner plate assembly spigot edge 51,

And B column reinforcement assembly 6.

Detailed Description

The following description of the embodiments of the present invention is provided by way of specific examples, and those skilled in the art will appreciate the advantages and utilities of the present invention from the disclosure herein. It should be noted that the drawings provided in the following embodiments are only for illustrative purposes, are schematic drawings rather than actual drawings, and are not to be construed as limiting the invention, and in order to better illustrate the embodiments of the invention, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

The first embodiment is as follows:

as shown in fig. 1 to 4, the B-pillar assembly made of a steel-aluminum mixed material of the present invention includes a B-pillar inner panel assembly 5 and a B-pillar reinforcement assembly 6 fixedly mounted on the B-pillar inner panel assembly 5;

the B upright post reinforcement assembly 6 comprises a B upright post reinforcement 3 and an aluminum alloy anti-collision beam assembly 4, the aluminum alloy anti-collision beam assembly 4 comprises an aluminum alloy anti-collision beam 42 which is arranged in a bending mode, and the aluminum alloy anti-collision beam 42 is fixedly arranged on the B upright post reinforcement 3;

the aluminum alloy anti-collision beam 42 is formed by bending section extruded aluminum profiles, and the section of the aluminum alloy anti-collision beam 42 is in a hollow self-closed form;

the elongation of the lower end of the B upright post inner plate assembly 5 is greater than that of the upper end of the B upright post inner plate assembly 5, and the yield strength of the lower end of the B upright post inner plate assembly 5 is less than that of the upper end of the B upright post inner plate assembly 5.

In this embodiment: the aluminum alloy anti-collision beam with the self-closed cross section is arranged in the B stand column assembly with the limited cavity size, so that a plurality of sheet metal reinforcement structures in the cavity of the B stand column assembly are replaced, the lap joint matching structure between parts in the cavity of the B stand column assembly is simplified, the weight balance is optimized, the side collision performance of the B stand column assembly can be greatly improved, meanwhile, the aluminum alloy anti-collision beam is used for replacing the reinforcement of the sheet metal structure, the light weight effect is obvious, and compared with the scheme that the section size of the B stand column assembly is increased on the basis of the prior art, the number of the reinforcement in the cavity of the B stand column assembly is increased, and the material grade or the material thickness of each component part of the B stand column assembly is improved, the invention has the advantages of simple structure, high performance improvement range, obvious overall weight and cost advantages and the like;

different yield strengths and different elongations are adopted for the upper end and the lower end of the B upright post inner plate assembly 5, so that the soft and hard partition of the B upright post assembly in the vertical direction is realized, namely, the lower end of the B upright post inner plate assembly 5 is made of a material with a slightly higher elongation according to the simulation result, so that the B upright post assembly preferentially deforms and absorbs energy corresponding to the area below the H point of the whole vehicle in the side collision process, and the collision energy to the part above the H point is reduced; the upper end of the B upright post inner plate assembly 5 is made of a material with slightly high yield strength according to simulation results, so that in the process of side collision, the deformation resistance of the B upright post assembly corresponding to the area above the H point of the whole vehicle is enhanced, the deformation invasion amount of the area above the H point of the B upright post assembly is reduced, and the injury of side collision to passengers in the vehicle is reduced as much as possible.

Example two:

as shown in fig. 1 to 4, the B-pillar assembly made of steel-aluminum mixed material of the present invention includes a B-pillar inner panel assembly 5 and a B-pillar reinforcement assembly 6 fixedly mounted on the B-pillar inner panel assembly 5,

the aluminum alloy anti-collision beam 42 is formed by bending an extruded aluminum profile with a hollow self-sealing section, two through reinforcing ribs 422 are longitudinally arranged in the aluminum alloy anti-collision beam 42, and the cross section of the aluminum alloy anti-collision beam 42 is in a shape like a Chinese character 'mu';

In this embodiment, compare with embodiment one, utilize self-sealing's aluminum alloy anticollision roof beam 42 and B stand inner panel assembly 5 of cross section, difference in the aspect of energy absorption between B stand reinforcement 3, make B stand assembly structure realize on the performance "soft or hard" subregion basis, further optimize aluminum alloy anticollision roof beam 42's structure, through strengthening rib 422, make aluminum alloy anticollision roof beam 42 follow and structurally have a plurality of independent cavitys, this kind of structural style can promote aluminum alloy anticollision roof beam 42 self structural strength, it has sufficient intensity to resist external impact force in the earlier stage of side collision process to be convenient for it simultaneously, the structure of multi-cavity also is convenient for its later stage absorbed energy in side collision process, play the effect of energy-absorbing buffering.

Example three:

as shown in fig. 1 to 4, the steel-aluminum mixed material B pillar assembly of the present invention comprises a B pillar inner panel assembly 5 and a B pillar reinforcement assembly 6,B pillar reinforcement assembly 6 fixedly mounted on the B pillar inner panel assembly 5, and comprises a B pillar reinforcement 3 and an aluminum alloy impact beam assembly 4;

the aluminum alloy anti-collision beam assembly 4 further comprises four connecting pieces 41 which are welded and connected to the aluminum alloy anti-collision beam 42 through cold metal transition CMT, the connecting pieces 41 are symmetrically arranged on two sides of the aluminum alloy anti-collision beam 42, and the connecting pieces 41 are L-shaped; the B upright post reinforcement assembly 6 also comprises B upright post reinforcement spigot edges 32 which are positioned at two sides of the B upright post reinforcement 3 and are integrally formed with the B upright post reinforcement 3, and the connecting piece 41 is connected with the B upright post reinforcement spigot edges 32 through self-piercing riveting SPR;

the aluminum alloy anti-collision beam assembly 4 comprises an aluminum alloy anti-collision beam 42 which is arranged in a bending mode, the aluminum alloy anti-collision beam 42 is formed by bending section extruded aluminum profiles, and the section of the aluminum alloy anti-collision beam 42 is in a hollow self-closed mode;

In this embodiment, compare with embodiment one, utilize self-closed aluminum alloy anticollision roof beam 42 and B stand inner panel assembly 5 of cross section, difference in the aspect of energy absorption between B stand reinforcement 3, make B stand assembly structure realize on the performance "soft or hard" subregion basis, further optimize the connection structure of aluminum alloy anticollision roof beam 42 between B stand reinforcement 3, connecting piece 41 is through the fixed connection with B stand reinforcement tang limit 32, cooperate the fixed connection of aluminum alloy anticollision roof beam 42 and connecting piece 41, accomplish the fixed connection of aluminum alloy anticollision roof beam 42 and B stand reinforcement 3, aluminum alloy anticollision roof beam 42 passes through connecting piece 41 and B stand reinforcement 3 fixed connection, simple structure, simple to operate.

Example four:

the B upright post reinforcement assembly 6 also comprises B upright post reinforcement spigot edges 32 which are positioned at two sides of the B upright post reinforcement 3 and are integrally formed with the B upright post reinforcement 3, B upright post inner plate assembly spigot edges 51 are also integrally formed at two sides of the B upright post inner plate assembly 5, and the B upright post reinforcement spigot edges 32 and the B upright post inner plate assembly spigot edges 51 are connected in a spot welding manner;

In this embodiment, compare with embodiment one, utilize self-closed aluminum alloy anticollision roof beam 42 of cross section and B stand inner panel assembly 5, the difference in the aspect of the energy absorption between B stand reinforcement 3, make B stand assembly structure realize on the performance "soft or hard" subregion basis, further optimize B stand reinforcement assembly 6 and B stand inner panel assembly 5's structure, connect through the spot welding of B stand reinforcement tang limit 32 and B stand inner panel assembly tang limit 51, accomplish the fixed connection of B stand reinforcement assembly 6 and B stand inner panel assembly 5, make B stand inner panel assembly 5 and B stand reinforcement assembly 6 form overall structure, simple process, processing is convenient, and the practicality is stronger.

Example five:

as shown in fig. 1 to 4, the B pillar assembly made of a steel-aluminum mixed material according to the present invention comprises a B pillar inner plate assembly 5 and a B pillar reinforcement assembly 6 fixedly mounted on the B pillar inner plate assembly 5;

the elongation rate of the B pillar lower inner plate 2,B pillar lower inner plate 2 at the upper end of the B pillar inner plate assembly 5, which is the B pillar upper inner plate 1,B pillar inner plate assembly 5, is larger than that of the B pillar upper inner plate 1, and the yield strength of the B pillar lower inner plate 2 is smaller than that of the B pillar upper inner plate 1;

the lower end of the B upright post upper inner plate 1 is provided with a B upright post upper inner plate lower connecting part 12, the upper end of the B upright post lower inner plate 2 is provided with a B upright post lower inner plate upper connecting part 21, and the lower inner plate upper connecting part 21 is connected with the upper inner plate lower connecting part 12 and is positioned on one side of the upper inner plate lower connecting part 12, which is far away from the B upright post reinforcement 3.

In the embodiment, compared with the first embodiment, on the basis of utilizing the difference in energy absorption between the aluminum alloy anti-collision beam 42 with the self-closed cross section and the B-pillar inner plate assembly 5 and the B-pillar reinforcement 3 to realize the soft and hard partition of the B-pillar assembly structure on the performance, the structure of the B-pillar inner plate assembly 5 is further optimized, the B-pillar inner plate assembly 5 is split into the B-pillar upper inner plate and the B-pillar lower inner plate 2, and casting is respectively performed, and after the casting is completed, the B-pillar inner plate assembly is welded on the B-pillar reinforcement 3, so that the manufacturing is more convenient, and the practicability is stronger; and the upper inner plate 1 of the B stand column and the lower inner plate 2 of the B stand column are in lap joint through the upper inner plate lower connecting part 12 of the B stand column and the upper connecting part 21 of the lower inner plate of the B stand column, and the structure is simple and the installation is convenient.

Example six:

the B upright post reinforcement assembly 6 also comprises B upright post reinforcement spigot edges 32 which are positioned at two sides of the B upright post reinforcement 3 and are integrally formed with the B upright post reinforcement 3, B upright post inner plate assembly spigot edges 51 are also integrally formed at two sides of the B upright post inner plate assembly 5, and the B upright post reinforcement spigot edges 32 and the B upright post inner plate assembly spigot edges 51 are connected by spot welding;

the aluminum alloy anti-collision beam assembly 4 further comprises four connecting pieces 41 which are welded and connected to the aluminum alloy anti-collision beam 42 through cold metal transition CMT, the connecting pieces 41 are symmetrically arranged on two sides of the aluminum alloy anti-collision beam 42, and the connecting pieces 41 are L-shaped; the connecting piece 41 is connected with the B upright post reinforcing piece spigot edge 32 through self-piercing riveting SPR;

In the embodiment, the B column assembly is relatively simple in structure, the hollow aluminum alloy anti-collision beam assembly 4 with the cross section in the shape of the Chinese character 'mu' is arranged inside the cavity of the B column assembly, conditions are created for optimizing and reducing the size of the cavity of the B column assembly, a plurality of reinforcing pieces inside the cavity of the B column assembly in the prior art are structurally replaced, the overlapping relation of parts inside the cavity of the B column assembly is optimized, and the external collision force is better resisted and absorbed by virtue of the structural characteristics of the multiple cavities of the aluminum alloy anti-collision beams, so that the requirements of the latest version of the Chinese new vehicle evaluation code (C-NCAP) on the side collision performance and the expectation of a consumer on the safety performance of the side collision of the automobile are met. Compared with the scheme that the material grade is improved, the material thickness is improved and the number of reinforcing pieces in the cavity of the B column assembly is increased in the prior art, the novel B column assembly has the advantages of remarkable weight and cost.

Example seven:

as shown in figures 1 to 4, the automobile of the invention comprises a side wall roof side rail inner plate, a threshold roof side rail inner plate, a side wall roof side rail outer plate, a threshold roof side rail outer plate and a steel-aluminum mixed material B upright post assembly,

the upper end of the B upright post inner plate assembly 5 is provided with a B upright post upper inner plate upper connecting part 11, the side wall upper edge beam inner plate is connected with the upper inner plate upper connecting part 11, the lower end of the B upright post inner plate assembly 5 is provided with a B upright post lower inner plate lower connecting part 22, the doorsill edge beam inner plate is connected with the lower inner plate lower connecting part 22, the B upright post reinforcement 3 comprises a reinforcing plate upper connecting part 31 and a reinforcing plate lower connecting part 33, the side wall upper edge beam outer plate is connected with the reinforcing plate upper connecting part 31, and the doorsill edge beam outer plate is connected with the reinforcing plate lower connecting part 33;

the steel-aluminum mixed material B upright post assembly comprises an upright post B inner plate assembly 5 and an upright post B reinforcement assembly 6 fixedly arranged on the upright post B inner plate assembly 5;

the upper end of the B pillar inner plate assembly 5 is a B pillar upper inner plate 1,B pillar inner plate assembly 5, the lower end of the B pillar lower inner plate 2,B pillar lower inner plate 2 has an elongation rate larger than that of the B pillar upper inner plate 1, and the yield strength of the B pillar lower inner plate 2 is smaller than that of the B pillar upper inner plate 1;

The steel-aluminum mixed material B stand column assembly and the automobile provided by the invention are described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

It should be noted that references in the specification to "one embodiment," "an embodiment," "some alternative embodiments," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

It should be readily understood that "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest manner such that "on … …" means not only "directly on something", but also "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning of "above" or "above" something, but also the meaning of "above" or "above" without intermediate features or layers therebetween (i.e., directly on something).

Furthermore, spatially relative terms, such as "below," "lower," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's illustrated relationship to another element or feature. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly as well.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The utility model provides a steel aluminium mixed material B stand assembly, includes B stand inner panel assembly (5) and B stand reinforcement assembly (6) of fixed mounting on B stand inner panel assembly (5), its characterized in that: b stand reinforcement assembly (6) include B stand reinforcement (3) and aluminum alloy anticollision roof beam assembly (4), aluminum alloy anticollision roof beam assembly (4) are including aluminum alloy anticollision roof beam (42) that the bending set up, aluminum alloy anticollision roof beam (42) fixed mounting is on B stand reinforcement (3), aluminum alloy anticollision roof beam (42) are the aluminium alloy shaping of buckling of extruding for the cross-section, the cross-section of aluminum alloy anticollision roof beam (42) is hollow from the closed form, the percentage elongation of B stand inner panel assembly (5) lower extreme is greater than the percentage elongation of B stand inner panel assembly (5) upper end, the yield strength of B stand inner panel assembly (5) lower extreme is less than the yield strength of B stand inner panel assembly (5) upper end.

2. The steel-aluminum mixed material B column assembly of claim 1, wherein: and a through reinforcing rib (422) is longitudinally arranged in the aluminum alloy anti-collision beam (42).

3. The steel-aluminum mixed material B column assembly of claim 2, wherein: the number of the reinforcing ribs (422) is two, and the cross section of the aluminum alloy anti-collision beam (42) is in a shape like a Chinese character 'mu'.

4. The steel-aluminum mixed material B column assembly of claim 1, wherein: the aluminum alloy anti-collision beam assembly (4) further comprises a plurality of connecting pieces (41) fixedly mounted on the aluminum alloy anti-collision beam (42), and the connecting pieces (41) are fixedly connected with the B column reinforcing piece (3).

5. The steel-aluminum mixed material B column assembly of claim 4, wherein: the aluminum alloy anti-collision beam (42) is connected with the connecting piece (41) through cold metal transition CMT welding.

6. The steel-aluminum mixed material B column assembly of claim 4, wherein: the B upright post reinforcement assembly (6) further comprises B upright post reinforcement spigot edges (32) which are positioned on two sides of the B upright post reinforcement (3) and are integrally formed with the B upright post reinforcement (3), and the connecting piece (41) is fixedly connected with the B upright post reinforcement spigot edges (32).

7. The steel-aluminum mixed material B column assembly of claim 6, wherein: the connecting piece (41) is connected with the B upright post reinforcing piece spigot edge (32) through self-piercing riveting SPR.

8. The steel-aluminum mixed material B column assembly of claim 4, wherein: the four connecting pieces (41) are symmetrically arranged on two sides of the aluminum alloy anti-collision beam (42), and the connecting pieces (41) are L-shaped.

9. The steel-aluminum mixed material B column assembly of claim 1, wherein: b stand reinforcement assembly (6) still including be located B stand reinforcement (3) both sides, and with B stand reinforcement (3) integrated into one piece's B stand reinforcement tang limit (32), the both sides of B stand inner panel assembly (5) still integrated into one piece have B stand inner panel assembly tang limit (51), B stand reinforcement tang limit (32) and B stand inner panel assembly tang limit (51) spot welding are connected.

10. The steel-aluminum mixed material B column assembly of claim 1, wherein: the upper end of B stand inner panel assembly (5) is inner panel (1) on the B stand, the lower extreme of B stand inner panel assembly (5) is inner panel (2) under the B stand, the percentage elongation of inner panel (2) is greater than the percentage elongation of inner panel (1) on the B stand under the B stand, the yield strength of inner panel (2) is less than the yield strength of inner panel (1) on the B stand under the B stand.

11. The steel-aluminum mixed material B column assembly of claim 10, wherein: inner panel (1) lower extreme is equipped with inner panel lower connecting portion (12) on the B stand, inner panel (2) upper end is equipped with connecting portion (21) on the inner panel under the B stand, connecting portion (21) are connected, are located connecting portion (12) keep away from B stand reinforcement (3) one side under upper inner panel and the last inner panel down in inner panel upper junction (21) and the last inner panel.

12. An automobile, characterized in that: including side wall roof side rail inner panel, threshold boundary beam inner panel, side wall roof side rail planking, threshold boundary beam planking and according to claim 1-11 any one a steel-aluminum mixed material B stand assembly, B stand inner panel assembly (5) upper end is equipped with B stand upper inner panel upper junction (11), side wall roof side rail inner panel is connected with upper inner panel upper junction (11), B stand inner panel assembly (5) lower extreme is equipped with B stand lower inner panel lower junction (22), threshold boundary beam inner panel is connected with lower inner panel lower junction (22), B stand reinforcement (3) include reinforcing plate upper junction (31) and reinforcing plate lower junction (33), side wall roof side rail planking is connected with reinforcing plate upper junction (31), the threshold boundary beam planking is connected with reinforcing plate lower junction (33).