A steel-aluminum mixed material B-pillar assembly and automobile

Abstract

The present invention belongs to the technical field of automobile safe driving, and specifically relates to a steel-aluminum mixed material B-pillar assembly, including a B-pillar inner panel assembly and a B-pillar reinforcement assembly fixedly mounted on the B-pillar inner panel assembly, the B-pillar reinforcement assembly including a B-pillar reinforcement and an aluminum alloy anti-collision beam assembly, the aluminum alloy anti-collision beam assembly including a bent aluminum alloy anti-collision beam, the aluminum alloy anti-collision beam fixedly mounted on the B-pillar reinforcement, the aluminum alloy anti-collision beam is a cross-section extruded aluminum profile bent and formed, the cross-section of the aluminum alloy anti-collision beam is a hollow self-enclosed form, the elongation of the lower end of the B-pillar inner panel assembly is greater than the elongation of the upper end of the B-pillar inner panel assembly, and the yield strength of the lower end of the B-pillar inner panel assembly is less than the yield strength of the upper end of the B-pillar inner panel assembly. Its purpose is to meet the requirements of the latest version of the China New Car Assessment Program (C-NCAP) for side collision performance while achieving a balance of multiple indicators such as performance, weight, and cost.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile safe driving, and specifically relates to a steel-aluminum mixed material B-pillar assembly and an automobile. Background Art

[0002] A Chinese utility model patent (publication number: CN201989859U) discloses a B-pillar structure for a car. Its B-pillar assembly structure consists of a two-layer structure of an outer panel and an inner panel, and a number of reinforcements are vertically arranged between the outer panel and the inner panel. The reinforcements weaken the mechanical strength of the position below the H point of the car corresponding to the human hip position, and strengthen the mechanical strength of the position above the H point corresponding to the human chest and abdomen, which can ensure the safety of the main parts of the human body, the chest and abdomen. The B-pillar assembly structure described in the prior art can support and absorb energy for the passenger compartment when the car is in a side collision. It plays an important role in reducing the speed of intrusion into the car when the car body is deformed, reducing the amount of intrusion of the car structure into the car, and ensuring the safety of the passengers in the passenger compartment. It is a good solution for the current version of the China New Car Assessment Program (C-NCAP) in terms of car side collision.

[0003] Existing problems: With the increasing demand of consumers for automobile safety and the gradual tightening of collision regulations, the background technology can no longer meet the increasingly stringent side impact test performance requirements. The latest version of the China New Car Assessment Program (C-NCAP) will adjust the test conditions for automobile side impact. Compared with the current assessment procedures, the weight of the barrier for side impact is increased from 1400kg to 1700kg, and the barrier impact speed is increased from 50km / h to 60km / h, resulting in an increase of about 75% in the impact energy of the side impact. At the same time, the height of the barrier for side impact is increased by 50mm from the ground, and the width of the barrier is increased by 115mm. As a result, when the vehicle is undergoing a side impact test, compared with the previous test method, the door sill structure of the vehicle cannot contact the barrier, and the impact area of ​​the barrier is all concentrated in the B-pillar structure and the door area of ​​the vehicle. From the perspective of body structure design, the ability of the B-pillar assembly structure to withstand impact energy must be improved.

[0004] Limited by the requirements of the front and rear door frame opening sizes and the space for the door frame to enter and exit, it is difficult to improve the structural strength of the B-pillar assembly by increasing the cavity size of the B-pillar assembly. For the existing technology, to significantly improve the structural strength of the B-pillar assembly, the available options often involve increasing the number of reinforcement parts, upgrading the material grade of the parts, and increasing the material thickness of the parts within the limited B-pillar cavity structure. This will undoubtedly greatly increase the overall weight and component cost of the B-pillar assembly, running counter to the trend of vehicle lightweighting. Therefore, how to find a new type of B-pillar assembly structure that can balance multiple indicators such as performance, weight, and cost while meeting the side collision performance requirements of the latest version of the China New Car Assessment Program (C-NCAP) is an important issue that urgently needs to be solved by body design engineers. Summary of the Invention

[0005] The object of the present invention is to provide a B-pillar assembly and an automobile made of a steel-aluminum hybrid material, which can balance multiple indicators such as performance, weight, and cost while meeting the side collision performance requirements of the latest version of the China New Car Assessment Program (C-NCAP).

[0006] To achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A B-pillar assembly made of a steel-aluminum hybrid material includes a B-pillar inner panel assembly and a B-pillar reinforcement assembly fixedly installed on the B-pillar inner panel assembly. The B-pillar reinforcement assembly includes a B-pillar reinforcement and an aluminum alloy anti-collision beam assembly. The aluminum alloy anti-collision beam assembly includes a bent aluminum alloy anti-collision beam, and the aluminum alloy anti-collision beam is fixedly installed on the B-pillar reinforcement. The aluminum alloy anti-collision beam is formed by bending an extruded aluminum profile with a hollow cross-section in a self-closed form. The elongation rate of the lower end of the B-pillar inner panel assembly is greater than that of the upper end of the B-pillar inner panel assembly, and the yield strength of the lower end of the B-pillar inner panel assembly is less than that of the upper end of the B-pillar inner panel assembly.

[0008] Further limited, a through reinforcement rib is longitudinally arranged inside the aluminum alloy anti-collision beam. With such a structural design, through the reinforcement rib, the aluminum alloy anti-collision beam has multiple independent cavities in terms of structure. This structural form can enhance the structural strength of the aluminum alloy anti-collision beam itself, facilitating it to have sufficient strength to resist external collision forces in the early stage of the side collision process. At the same time, the multi-cavity structure is also conducive to absorbing energy in the later stage of the side collision process, playing a role in energy absorption and buffering.

[0009] Further limited, there are two reinforcement ribs, and the cross-section of the aluminum alloy anti-collision beam is in the shape of a "mu".

[0010] It is further defined that the aluminum alloy anti-collision beam assembly also includes a plurality of connectors fixedly mounted on the aluminum alloy anti-collision beam, and the connectors are fixedly connected to the B-pillar reinforcement. With such a structural design, the aluminum alloy anti-collision beam is fixedly connected to the B-pillar reinforcement through the connectors, which has a simple structure and is easy to install.

[0011] It is further defined that the aluminum alloy anti-collision beam and the connecting piece are connected by cold metal transition (CMT) welding.

[0012] It is further defined that the B-pillar reinforcement assembly also includes B-pillar reinforcement stop edges located on both sides of the B-pillar reinforcement and formed integrally with the B-pillar reinforcement, and the connecting piece is fixedly connected to the stop edges of the B-pillar reinforcement. With such a structural design, the connecting piece is fixedly connected to the stop edges of the B-pillar reinforcement and cooperates with the fixed connection between the aluminum alloy anti-collision beam and the connecting piece to complete the fixed connection between the aluminum alloy anti-collision beam and the B-pillar reinforcement.

[0013] It is further defined that the connecting member is connected to the stop edge of the B-pillar reinforcement by self-piercing riveting SPR.

[0014] It is further defined that the number of the connecting parts is four and they are symmetrically arranged on both sides of the aluminum alloy anti-collision beam, and the connecting parts are L-shaped.

[0015] It is further defined that the B-pillar reinforcement assembly also includes B-pillar reinforcement stop edges located on both sides of the B-pillar reinforcement and formed integrally with the B-pillar reinforcement, and the B-pillar inner panel assembly stop edges are also formed integrally on both sides of the B-pillar inner panel assembly, and the B-pillar reinforcement stop edges and the B-pillar inner panel assembly stop edges are spot-welded. Such a structural design completes the fixed connection between the B-pillar reinforcement assembly and the B-pillar inner panel assembly through the spot-welding connection of the B-pillar reinforcement stop edges and the B-pillar inner panel assembly stop edges, so that the B-pillar inner panel assembly and the B-pillar reinforcement assembly form an integral structure, which has simple process, convenient processing, and strong practicality.

[0016] It is further defined that the upper end of the B-pillar inner panel assembly is the B-pillar upper inner panel, the lower end of the B-pillar inner panel assembly is the B-pillar lower inner panel, the elongation of the B-pillar lower inner panel is greater than the elongation of the B-pillar upper inner panel, and the yield strength of the B-pillar lower inner panel is less than the yield strength of the B-pillar upper inner panel. Such a structural design is more convenient to manufacture and more practical by splitting the B-pillar inner panel assembly into the B-pillar upper inner panel and the B-pillar lower inner panel, and casting them separately, and then welding them to the B-pillar reinforcement after casting.

[0017] It is further defined that the lower end of the B-pillar upper inner panel is provided with a B-pillar upper inner panel lower connecting portion, the upper end of the B-pillar lower inner panel is provided with a B-pillar lower inner panel upper connecting portion, the lower inner panel connecting portion is connected to the upper inner panel lower connecting portion, and is located on the side of the upper inner panel lower connecting portion away from the B-pillar reinforcement. With this structural design, the B-pillar upper inner panel and the B-pillar lower inner panel are overlapped through the B-pillar upper inner panel lower connecting portion and the B-pillar lower inner panel connecting portion, which is simple in structure and easy to install.

[0018] A car comprises a side panel upper side beam inner plate, a door sill side beam inner plate, a side panel upper side beam outer plate, a door sill side beam outer plate and a B-pillar assembly made of a steel-aluminum mixed material as described above, wherein the upper end of the B-pillar inner plate assembly is provided with a B-pillar upper inner plate upper connecting portion, the side panel upper side beam inner plate is connected to the upper inner plate upper connecting portion, the lower end of the B-pillar inner plate assembly is provided with a B-pillar lower inner plate lower connecting portion, the door sill side beam inner plate is connected to the lower inner plate lower connecting portion, the B-pillar reinforcement comprises a reinforcement plate upper connecting portion and a reinforcement plate lower connecting portion, the side panel upper side beam outer plate is connected to the reinforcement plate upper connecting portion, and the door sill side beam outer plate is connected to the reinforcement plate lower connecting portion.

[0019] The invention adopting the above technical solution has the following advantages:

[0020] 1. By arranging a self-enclosed aluminum alloy anti-collision beam in the B-pillar assembly with a limited cavity size, so as to replace several sheet metal reinforcement structures in the cavity of the B-pillar assembly, the lap matching structure between the internal parts of the B-pillar assembly cavity is simplified and the weight balance is optimized, and the side collision performance of the B-pillar assembly can be greatly improved. At the same time, the aluminum alloy anti-collision beam is used to replace the reinforcement of the sheet metal structure, and the lightweight effect is significant. Compared with the scheme of increasing the cross-sectional size of the B-pillar assembly, increasing the number of reinforcements in the cavity of the B-pillar assembly, and increasing the material grade or material thickness of each component of the B-pillar assembly on the basis of the existing technology, the present invention has the advantages of simple structure, high performance improvement, and obvious overall advantages in weight and cost.

[0021] 2. By using different yield strengths and elongations at the upper and lower ends of the B-pillar inner panel assembly, the purpose is to achieve soft and hard partitioning of the B-pillar assembly in the vertical direction, that is, the lower end of the B-pillar inner panel assembly needs to use a material with a slightly higher elongation according to the simulation results, so that during a side collision, the area below the H point of the B-pillar assembly corresponding to the whole vehicle will be deformed and absorb energy first, thereby reducing the impact energy to the part above the H point; the upper end of the B-pillar inner panel assembly needs to use a material with a slightly higher yield strength according to the simulation results, so that during a side collision, the deformation resistance of the area above the H point of the B-pillar assembly corresponding to the whole vehicle will be enhanced, the deformation intrusion amount of the area above the H point of the B-pillar assembly will be reduced, and the damage to the occupants in the vehicle caused by the side collision will be reduced as much as possible;

[0022] 3. The aluminum alloy anti-collision beam has multiple independent cavities in structure through reinforcing ribs. This structural form can improve the structural strength of the aluminum alloy anti-collision beam itself, so that it has sufficient strength to resist external collision force in the early stage of the side collision process. At the same time, the multi-cavity structure also makes it easier to absorb energy in the later stage of the side collision process, playing the role of energy absorption and buffering;

[0023] 4. The connecting piece is fixedly connected to the stop edge of the B-pillar reinforcement, and cooperates with the fixed connection between the aluminum alloy anti-collision beam and the connecting piece to complete the fixed connection between the aluminum alloy anti-collision beam and the B-pillar reinforcement;

[0024] 5. The fixed connection between the B-pillar reinforcement assembly and the B-pillar inner panel assembly is completed by spot welding the stop edge of the B-pillar reinforcement and the stop edge of the B-pillar inner panel assembly, so that the B-pillar inner panel assembly and the B-pillar reinforcement assembly form an integral structure, which has simple process, convenient processing and strong practicality;

[0025] 6. By splitting the B-pillar inner panel assembly into the B-pillar upper inner panel and the B-pillar lower inner panel, and casting them separately, and then welding them to the B-pillar reinforcement after casting, the manufacturing is more convenient and more practical;

[0026] 7. The upper inner plate of the B-pillar and the lower inner plate of the B-pillar are overlapped by the lower connecting part of the upper inner plate of the B-pillar and the upper connecting part of the lower inner plate of the B-pillar, which has a simple structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In addition, in the drawings, the same components are marked with the same reference numerals, and the drawings are not drawn according to the actual scale;

[0028] Figure 1 It is a structural schematic diagram of a steel-aluminum mixed material B-pillar assembly and an automobile embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the exploded structure of parts of a steel-aluminum mixed material B-pillar assembly and an automobile embodiment of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a steel-aluminum mixed material B-pillar assembly and an anti-collision beam assembly part in an automobile embodiment of the present invention;

[0031] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the section at AA;

[0032] The main component symbols are described as follows:

[0033] B pillar upper inner plate 1, B pillar upper inner plate connecting portion 11, B pillar upper inner plate lower connecting portion 12,

[0034] B pillar lower inner plate 2, B pillar lower inner plate connecting portion 21, B pillar lower inner plate lower connecting portion 22,

[0035] B pillar reinforcement 3, connection part 31 on reinforcement plate, stop edge 32 of B pillar reinforcement, connection part 33 under reinforcement plate,

[0036] Aluminum alloy anti-collision beam assembly 4, connecting piece 41, aluminum alloy anti-collision beam 42, reinforcing rib 422,

[0037] B pillar inner panel assembly 5, B pillar inner panel assembly stop edge 51,

[0038] B pillar reinforcement assembly 6. DETAILED DESCRIPTION

[0039] The following describes the implementation of the present invention through specific specific embodiments, and those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and only schematic diagrams are shown, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the figures.

[0040] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] Embodiment 1:

[0042] like Figure 1 to Figure 4 As shown, a steel-aluminum mixed material B-pillar assembly 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;

[0043] The B-pillar reinforcement assembly 6 includes a B-pillar reinforcement 3 and an aluminum alloy anti-collision beam assembly 4, wherein the aluminum alloy anti-collision beam assembly 4 includes a bent aluminum alloy anti-collision beam 42, and the aluminum alloy anti-collision beam 42 is fixedly mounted on the B-pillar reinforcement 3;

[0044] The aluminum alloy anti-collision beam 42 is formed by bending a cross-section of an extruded aluminum profile, and the cross-section of the aluminum alloy anti-collision beam 42 is a hollow self-enclosed form;

[0045] The elongation of the lower end of the B-pillar inner panel assembly 5 is greater than the elongation of the upper end of the B-pillar inner panel assembly 5 , and the yield strength of the lower end of the B-pillar inner panel assembly 5 is less than the yield strength of the upper end of the B-pillar inner panel assembly 5 .

[0046] In this embodiment: by arranging an aluminum alloy anti-collision beam with a self-enclosed cross section inside the B-pillar assembly with a limited cavity size, so as to replace a plurality of sheet metal reinforcement structures inside the cavity of the B-pillar assembly, the lap matching structure between the internal components of the cavity of the B-pillar assembly is simplified and the weight balance is optimized, and the side collision performance of the B-pillar assembly can be greatly improved. At the same time, the aluminum alloy anti-collision beam is used to replace the reinforcement of the sheet metal structure, and the lightweight effect is significant. Compared with the scheme of increasing the cross-sectional size of the B-pillar assembly, increasing the number of reinforcements inside the cavity of the B-pillar assembly, and increasing the material grade or material thickness of each component of the B-pillar assembly on the basis of the prior art, the present invention has the advantages of simple structure, high performance improvement, and obvious overall advantages in weight and cost.

[0047] By adopting different yield strengths and elongations at the upper and lower ends of the B-pillar inner panel assembly 5, the purpose is to achieve soft and hard zoning of the B-pillar assembly in the vertical direction, that is, the lower end of the B-pillar inner panel assembly 5 needs to use a material with a slightly higher elongation according to the simulation results, so that during a side collision, the area below the H point of the B-pillar assembly corresponding to the whole vehicle can be deformed and absorb energy first, thereby reducing the impact energy to the part above the H point; the upper end of the B-pillar inner panel assembly 5 needs to use a material with a slightly higher yield strength according to the simulation results, so that during a side collision, the deformation resistance of the area above the H point of the B-pillar assembly corresponding to the whole vehicle can be enhanced, the deformation intrusion amount of the area above the H point of the B-pillar assembly can be reduced, and the damage to the occupants in the vehicle caused by the side collision can be reduced as much as possible.

[0048] Embodiment 2:

[0049] like Figure 1 to Figure 4 As shown, a steel-aluminum mixed material B-pillar assembly 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.

[0050] The B-pillar reinforcement assembly 6 includes a B-pillar reinforcement 3 and an aluminum alloy anti-collision beam assembly 4. The aluminum alloy anti-collision beam assembly 4 includes a bent aluminum alloy anti-collision beam 42, and the aluminum alloy anti-collision beam 42 is fixedly installed on the B-pillar reinforcement 3.

[0051] The aluminum alloy anti-collision beam 42 is formed by bending an extruded aluminum profile with a cross-section, and the cross-section of the aluminum alloy anti-collision beam 42 is in a hollow self-enclosed form. Two through ribs 422 are longitudinally arranged inside the aluminum alloy anti-collision beam 42, and the cross-section of the aluminum alloy anti-collision beam 42 is in a "mu" shape.

[0052] The elongation rate of the lower end of the B-pillar inner panel assembly 5 is greater than that of the upper end of the B-pillar inner panel assembly 5, and the yield strength of the lower end of the B-pillar inner panel assembly 5 is less than that of the upper end of the B-pillar inner panel assembly 5.

[0053] In this embodiment, compared with the first embodiment, by utilizing the difference in energy absorption between the aluminum alloy anti-collision beam 42 with a self-enclosed cross-section and the B-pillar inner panel assembly 5 and the B-pillar reinforcement 3, on the basis of realizing the "soft-hard" zoning in the performance of the B-pillar assembly structure, the structure of the aluminum alloy anti-collision beam 42 is further optimized. Through the ribs 422, the aluminum alloy anti-collision beam 42 has multiple independent cavities in structure. This structural form can improve the structural strength of the aluminum alloy anti-collision beam 42 itself, facilitate it to have sufficient strength to resist external collision forces in the early stage of a side collision, and at the same time, the multi-cavity structure is also convenient for it to absorb energy in the later stage of a side collision, playing a role in energy absorption and buffering.

[0054] Embodiment Three:

[0055] As Figure 1 to Figure 4 shown, a steel-aluminum hybrid B-pillar assembly of the present invention includes a B-pillar inner panel assembly 5 and a B-pillar reinforcement assembly 6 fixedly installed on the B-pillar inner panel assembly 5. The B-pillar reinforcement assembly 6 includes a B-pillar reinforcement 3 and an aluminum alloy anti-collision beam assembly 4;

[0056] The aluminum alloy anti-collision beam assembly 4 further includes four connectors 41 connected to the aluminum alloy anti-collision beam 42 by cold metal transfer CMT welding. The connectors 41 are symmetrically arranged on both sides of the aluminum alloy anti-collision beam 42, and the connectors 41 are in an L shape. The B-pillar reinforcement assembly 6 further includes B-pillar reinforcement stop edges 32 located on both sides of the B-pillar reinforcement 3 and integrally formed with the B-pillar reinforcement 3. The connectors 41 are connected to the B-pillar reinforcement stop edges 32 by self-piercing riveting SPR;

[0057] The aluminum alloy anti-collision beam assembly 4 includes a bent aluminum alloy anti-collision beam 42. The aluminum alloy anti-collision beam 42 is formed by bending an extruded aluminum profile with a cross-section, and the cross-section of the aluminum alloy anti-collision beam 42 is in a hollow self-enclosed form;

[0058] The elongation of the lower end of the B-pillar inner panel assembly 5 is greater than the elongation of the upper end of the B-pillar inner panel assembly 5 , and the yield strength of the lower end of the B-pillar inner panel assembly 5 is less than the yield strength of the upper end of the B-pillar inner panel assembly 5 .

[0059] In this embodiment, compared with the first embodiment, the difference in energy absorption between the aluminum alloy anti-collision beam 42 with a self-closed cross-section and the B-pillar inner panel assembly 5 and the B-pillar reinforcement 3 is utilized to achieve "soft and hard" zoning in performance of the B-pillar assembly structure, and the connection structure between the aluminum alloy anti-collision beam 42 and the B-pillar reinforcement 3 is further optimized. The connecting member 41 is fixedly connected to the stop edge 32 of the B-pillar reinforcement, and the fixed connection between the aluminum alloy anti-collision beam 42 and the connecting member 41 is coordinated to complete the fixed connection between the aluminum alloy anti-collision beam 42 and the B-pillar reinforcement 3. The aluminum alloy anti-collision beam 42 is fixedly connected to the B-pillar reinforcement 3 through the connecting member 41, and the structure is simple and easy to install.

[0060] Embodiment 4:

[0061] like Figure 1 to Figure 4 As shown, a steel-aluminum mixed material B-pillar assembly 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;

[0062] The B-pillar reinforcement assembly 6 also includes a B-pillar reinforcement stop edge 32 located on both sides of the B-pillar reinforcement 3 and formed integrally with the B-pillar reinforcement 3. The B-pillar inner panel assembly stop edges 51 are also formed integrally on both sides of the B-pillar inner panel assembly 5. The B-pillar reinforcement stop edge 32 and the B-pillar inner panel assembly stop edge 51 are spot-welded;

[0063] The B-pillar reinforcement assembly 6 includes a B-pillar reinforcement 3 and an aluminum alloy anti-collision beam assembly 4, wherein the aluminum alloy anti-collision beam assembly 4 includes a bent aluminum alloy anti-collision beam 42, and the aluminum alloy anti-collision beam 42 is fixedly mounted on the B-pillar reinforcement 3;

[0064] The aluminum alloy anti-collision beam 42 is formed by bending a cross-section of an extruded aluminum profile, and the cross-section of the aluminum alloy anti-collision beam 42 is a hollow self-enclosed form;

[0065] The elongation of the lower end of the B-pillar inner panel assembly 5 is greater than the elongation of the upper end of the B-pillar inner panel assembly 5 , and the yield strength of the lower end of the B-pillar inner panel assembly 5 is less than the yield strength of the upper end of the B-pillar inner panel assembly 5 .

[0066] In this embodiment, compared with the first embodiment, the difference in energy absorption between the aluminum alloy anti-collision beam 42 with a self-closed cross-section and the B-pillar inner panel assembly 5 and the B-pillar reinforcement 3 is utilized to achieve "soft and hard" zoning in performance of the B-pillar assembly structure, and the structures of the B-pillar reinforcement assembly 6 and the B-pillar inner panel assembly 5 are further optimized. The fixed connection between the B-pillar reinforcement assembly 6 and the B-pillar inner panel assembly 5 is completed by spot welding the B-pillar reinforcement stop edge 32 and the B-pillar inner panel assembly stop edge 51, so that the B-pillar inner panel assembly 5 and the B-pillar reinforcement assembly 6 form an integral structure, which has a simple process, convenient processing and strong practicality.

[0067] Embodiment five:

[0068] like Figure 1 to Figure 4 As shown, a steel-aluminum mixed material B-pillar assembly 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;

[0069] The B-pillar reinforcement assembly 6 includes a B-pillar reinforcement 3 and an aluminum alloy anti-collision beam assembly 4, wherein the aluminum alloy anti-collision beam assembly 4 includes a bent aluminum alloy anti-collision beam 42, and the aluminum alloy anti-collision beam 42 is fixedly mounted on the B-pillar reinforcement 3;

[0070] The aluminum alloy anti-collision beam 42 is formed by bending a cross-section of an extruded aluminum profile, and the cross-section of the aluminum alloy anti-collision beam 42 is a hollow self-enclosed form;

[0071] The upper end of the B-pillar inner panel assembly 5 is the B-pillar upper inner panel 1, and the lower end of the B-pillar inner panel assembly 5 is the B-pillar lower inner panel 2. The elongation of the B-pillar lower inner panel 2 is greater than the elongation of the B-pillar upper inner panel 1, and the yield strength of the B-pillar lower inner panel 2 is less than the yield strength of the B-pillar upper inner panel 1.

[0072] A B-pillar upper inner panel lower connecting portion 12 is provided at the lower end of the B-pillar upper inner panel 1, and a B-pillar lower inner panel upper connecting portion 21 is provided at the upper end of the B-pillar lower inner panel 2. The lower inner panel connecting portion 21 is connected to the upper inner panel lower connecting portion 12 and is located on the side of the upper inner panel lower connecting portion 12 away from the B-pillar reinforcement 3.

[0073] In this embodiment, compared with the first embodiment, the difference in energy absorption between the aluminum alloy anti-collision beam 42 with a self-sealing cross-section and the B-pillar inner panel assembly 5 and the B-pillar reinforcement 3 enables the B-pillar assembly structure to achieve a "soft-hard" partition in performance. On this basis, the structure of the B-pillar inner panel assembly 5 is further optimized. By splitting the B-pillar inner panel assembly 5 into the upper B-pillar inner panel and the lower B-pillar inner panel 2 and casting them separately, and then welding them to the B-pillar reinforcement 3 after casting, the manufacturing is more convenient and the practicability is stronger. The upper B-pillar inner panel 1 and the lower B-pillar inner panel 2 are overlapped through the lower connection part 12 of the upper B-pillar inner panel and the upper connection part 21 of the lower B-pillar inner panel, with a simple structure and convenient installation.

[0074] Embodiment Six:

[0075] As Figure 1 to Figure 4 shown, a steel-aluminum hybrid B-pillar assembly of the present invention includes a B-pillar inner panel assembly 5 and a B-pillar reinforcement assembly 6 fixedly installed on the B-pillar inner panel assembly 5;

[0076] The B-pillar reinforcement assembly 6 further includes B-pillar reinforcement stop edges 32 located on both sides of the B-pillar reinforcement 3 and integrally formed with the B-pillar reinforcement 3. B-pillar inner panel assembly stop edges 51 are integrally formed on both sides of the B-pillar inner panel assembly 5. The B-pillar reinforcement stop edges 32 and the B-pillar inner panel assembly stop edges 51 are connected by spot welding;

[0077] The B-pillar reinforcement assembly 6 includes a B-pillar reinforcement 3 and an aluminum alloy anti-collision beam assembly 4. The aluminum alloy anti-collision beam assembly 4 includes a bent aluminum alloy anti-collision beam 42, and the aluminum alloy anti-collision beam 42 is fixedly installed on the B-pillar reinforcement 3;

[0078] The aluminum alloy anti-collision beam 42 is formed by bending a cross-section extruded aluminum profile. The cross-section of the aluminum alloy anti-collision beam 42 is in a self-sealing hollow form. Two through ribs 422 are longitudinally arranged inside the aluminum alloy anti-collision beam 42, and the cross-section of the aluminum alloy anti-collision beam 42 is in a "mu" shape;

[0079] The aluminum alloy anti-collision beam assembly 4 further includes four connectors 41 connected to the aluminum alloy anti-collision beam 42 by cold metal transfer CMT welding. The connectors 41 are symmetrically arranged on both sides of the aluminum alloy anti-collision beam 42, and the connectors 41 are in an L shape; the connectors 41 are connected to the B-pillar reinforcement stop edges 32 by self-piercing riveting SPR;

[0080] The upper end of the B-pillar inner panel assembly 5 is the upper B-pillar inner panel 1, and the lower end of the B-pillar inner panel assembly 5 is the lower B-pillar inner panel 2. The elongation rate of the lower B-pillar inner panel 2 is greater than that of the upper B-pillar inner panel 1, and the yield strength of the lower B-pillar inner panel 2 is less than that of the upper B-pillar inner panel 1;

[0081] The lower end of the inner upper B-pillar panel 1 is provided with a lower connecting portion 12 of the inner upper B-pillar panel, and the upper end of the inner lower B-pillar panel 2 is provided with an upper connecting portion 21 of the inner lower B-pillar panel. The upper connecting portion 21 of the inner lower B-pillar panel is connected to the lower connecting portion 12 of the inner upper B-pillar panel and is located on the side of the lower connecting portion 12 of the inner upper B-pillar panel away from the B-pillar reinforcement 3.

[0082] In this embodiment, the structure of the B-pillar assembly is relatively simple. The aluminum alloy anti-collision beam assembly 4, which is hollow and has a "mu" shaped cross-section, is arranged inside the cavity of the B-pillar assembly. This not only creates conditions for optimizing and reducing the cavity size of the B-pillar assembly, but also replaces several reinforcing members inside the cavity of the B-pillar assembly in the prior art solution in terms of structure, optimizing the lap relationship of the components inside the cavity of the B-pillar assembly. Moreover, relying on the multi-cavity structural characteristics of the aluminum alloy anti-collision beam, it can better resist and absorb external collision forces to meet the requirements of the latest version of the China New Car Assessment Program (C-NCAP) for side collision performance and the expectations of consumers for the side collision safety performance of automobiles. Compared with the prior art solution that uses methods such as improving the material grade, increasing the material thickness, and increasing the number of reinforcing members inside the cavity of the B-pillar assembly, the present invention has significant weight and cost advantages.

[0083] Embodiment Seven:

[0084] As Figure 1 to Figure 4 shown, an automobile of the present invention includes an inner upper side member panel, an inner lower sill panel, an outer upper side member panel, an outer lower sill panel, and a steel-aluminum hybrid B-pillar assembly.

[0085] The upper end of the B-pillar inner panel assembly 5 is provided with an upper connecting portion 11 of the inner upper B-pillar panel. The inner upper side member panel is connected to the upper connecting portion 11 of the inner upper B-pillar panel. The lower end of the B-pillar inner panel assembly 5 is provided with a lower connecting portion 22 of the inner lower B-pillar panel. The inner lower sill panel is connected to the lower connecting portion 22 of the inner lower B-pillar panel. The B-pillar reinforcement 3 includes an upper connecting portion 31 of the reinforcement plate and a lower connecting portion 33 of the reinforcement plate. The outer upper side member panel is connected to the upper connecting portion 31 of the reinforcement plate, and the outer lower sill panel is connected to the lower connecting portion 33 of the reinforcement plate.

[0086] The steel-aluminum hybrid B-pillar assembly includes a B-pillar inner panel assembly 5 and a B-pillar reinforcement assembly 6 fixedly installed on the B-pillar inner panel assembly 5.

[0087] The B-pillar reinforcement assembly 6 further includes B-pillar reinforcement stop edges 32 located on both sides of the B-pillar reinforcement 3 and integrally formed with the B-pillar reinforcement 3. On both sides of the B-pillar inner panel assembly 5, there are also integrally formed B-pillar inner panel assembly stop edges 51. The B-pillar reinforcement stop edges 32 and the B-pillar inner panel assembly stop edges 51 are connected by spot welding.

[0088] The B-pillar reinforcement assembly 6 includes a B-pillar reinforcement 3 and an aluminum alloy anti-collision beam assembly 4. The aluminum alloy anti-collision beam assembly 4 includes an aluminum alloy anti-collision beam 42 which is bent. The aluminum alloy anti-collision beam 42 is fixedly installed on the B-pillar reinforcement 3.

[0089] The aluminum alloy anti-collision beam 42 is formed by bending an extruded aluminum profile with a cross-section. The cross-section of the aluminum alloy anti-collision beam 42 is in a hollow self-enclosed form. Two through stiffeners 422 are longitudinally arranged inside the aluminum alloy anti-collision beam 42, and the cross-section of the aluminum alloy anti-collision beam 42 is in a "mu" shape.

[0090] The aluminum alloy anti-collision beam assembly 4 further includes four connectors 41 which are connected to the aluminum alloy anti-collision beam 42 by cold metal transfer CMT welding. The connectors 41 are symmetrically arranged on both sides of the aluminum alloy anti-collision beam 42, and the connectors 41 are in an L shape. The connectors 41 are connected to the B-pillar reinforcement stop edge 32 by self-piercing riveting SPR.

[0091] The upper end of the B-pillar inner panel assembly 5 is the B-pillar upper inner panel 1, and the lower end of the B-pillar inner panel assembly 5 is the B-pillar lower inner panel 2. The elongation rate of the B-pillar lower inner panel 2 is greater than that of the B-pillar upper inner panel 1, and the yield strength of the B-pillar lower inner panel 2 is less than that of the B-pillar upper inner panel 1.

[0092] The lower end of the B-pillar upper inner panel 1 is provided with a B-pillar upper inner panel lower connection part 12, and the upper end of the B-pillar lower inner panel 2 is provided with a B-pillar lower inner panel upper connection part 21. The lower inner panel upper connection part 21 is connected to the upper inner panel lower connection part 12 and is located on the side of the upper inner panel lower connection part 12 away from the B-pillar reinforcement 3.

[0093] The above has introduced in detail a steel-aluminum hybrid B-pillar assembly and an automobile provided by the present invention. The description of the specific embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0094] It should be noted that the expressions such as "an embodiment", "embodiments", "some optional embodiments", "exemplary embodiments", "some embodiments" mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily each embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when combining specific features, structures or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures or characteristics in combination with other embodiments that are explicitly or not explicitly described.

[0095] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0096] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0097] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A steel-aluminum hybrid B-pillar assembly, comprising a B-pillar inner panel assembly (5) and a B-pillar reinforcement assembly (6) fixedly mounted on the B-pillar inner panel assembly (5), characterized in that: The B-pillar reinforcement assembly (6) includes a B-pillar reinforcement (3) and an aluminum alloy anti-collision beam assembly (4). The aluminum alloy anti-collision beam assembly (4) includes an aluminum alloy anti-collision beam (42) that is bent. The aluminum alloy anti-collision beam (42) is fixedly installed on the B-pillar reinforcement (3). The aluminum alloy anti-collision beam (42) is formed by bending a cross-section extruded aluminum profile. The cross-section of the aluminum alloy anti-collision beam (42) is in a hollow self-closed form. The elongation rate of the lower end of the B-pillar inner panel assembly (5) is greater than that of the upper end of the B-pillar inner panel assembly (5), and the yield strength of the lower end of the B-pillar inner panel assembly (5) is less than that of the upper end of the B-pillar inner panel assembly (5). The aluminum alloy anti-collision beam assembly (4) further includes a plurality of connectors (41) fixedly installed on the aluminum alloy anti-collision beam (42). The connectors (41) are fixedly connected to the B-pillar reinforcement (3). The B-pillar reinforcement assembly (6) further includes B-pillar reinforcement stop edges (32) located on both sides of the B-pillar reinforcement (3) and integrally formed with the B-pillar reinforcement (3). The connectors (41) are fixedly connected to the B-pillar reinforcement stop edges (32).

2. The steel-aluminum mixed material B-pillar assembly according to claim 1, characterized in that: A through stiffening rib (422) is longitudinally arranged inside the aluminum alloy anti-collision beam (42).

3. The steel-aluminum mixed material B-pillar assembly according to claim 2, characterized in that: There are two stiffening ribs (422), and the cross-section of the aluminum alloy anti-collision beam (42) is in a "mu" shape.

4. The steel-aluminum mixed material B-pillar assembly according to claim 1, characterized in that: The aluminum alloy anti-collision beam (42) and the connector (41) are connected by cold metal transfer CMT welding.

5. The steel-aluminum mixed material B-pillar assembly according to claim 1, characterized in that: The connector (41) and the B-pillar reinforcement stop edge (32) are connected by self-piercing riveting SPR.

6. The steel-aluminum mixed material B-pillar assembly according to claim 1, characterized in that: There are four connectors (41), which are symmetrically arranged on both sides of the aluminum alloy anti-collision beam (42). The connectors (41) are in an L shape.

7. The steel-aluminum mixed material B-pillar assembly according to claim 1, characterized in that: B-pillar inner panel assembly stop edges (51) are integrally formed on both sides of the B-pillar inner panel assembly (5). The B-pillar reinforcement stop edges (32) and the B-pillar inner panel assembly stop edges (51) are connected by spot welding.

8. The steel-aluminum mixed material B-pillar assembly according to claim 1, characterized in that: The upper end of the B-pillar inner panel assembly (5) is the B-pillar upper inner panel (1), and the lower end of the B-pillar inner panel assembly (5) is the B-pillar lower inner panel (2). The elongation rate of the B-pillar lower inner panel (2) is greater than that of the B-pillar upper inner panel (1), and the yield strength of the B-pillar lower inner panel (2) is less than that of the B-pillar upper inner panel (1).

9. The steel-aluminum mixed material B-pillar assembly according to claim 8, characterized in that: A B-pillar upper inner panel lower connection part (12) is provided at the lower end of the B-pillar upper inner panel (1). A B-pillar lower inner panel upper connection part (21) is provided at the upper end of the B-pillar lower inner panel (2). The lower inner panel upper connection part (21) is connected to the upper inner panel lower connection part (12) and is located on the side of the upper inner panel lower connection part (12) away from the B-pillar reinforcement (3).

10. An automobile, characterized in that: The invention comprises a side panel upper beam inner plate, a door sill beam inner plate, a side panel upper beam outer plate, a door sill beam outer plate and a steel-aluminum mixed material B-pillar assembly as claimed in any one of claims 1 to 9, wherein the upper end of the B-pillar inner plate assembly (5) is provided with a B-pillar upper inner plate upper connecting portion (11), the side panel upper beam inner plate is connected to the upper inner plate upper connecting portion (11), the lower end of the B-pillar inner plate assembly (5) is provided with a B-pillar lower inner plate lower connecting portion (22), the door sill beam inner plate is connected to the lower inner plate lower connecting portion (22), the B-pillar reinforcement (3) comprises a reinforcement plate upper connecting portion (31) and a reinforcement plate lower connecting portion (33), the side panel upper beam outer plate is connected to the reinforcement plate upper connecting portion (31), and the door sill beam outer plate is connected to the reinforcement plate lower connecting portion (33).

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