B column assembly structure and automobile

Abstract

The invention belongs to the technical field of automobiles, and provides a B column assembly structure and an automobile, a side wall outer plate, a first bent plate and a second bent plate of the B column assembly structure are sequentially connected to form a # imgabs 0 # cavity, and a B column reinforcing plate is installed in the # imgabs 1 # cavity; the B column reinforcing plate comprises a cavity and a third bent plate which are connected with each other, the third bent plate is fixedly connected with the inner side of the second bent plate, and a protruding plate of the cavity is fixedly connected with the first bent plate; the thickness of the wall of the side, close to the side wall outer plate, of the cavity is smaller than that of the wall of the side, away from the side wall outer plate, of the cavity. The B-column assembly structure comprises the B-column reinforcing plate, the B-column reinforcing plate is composed of the cavity and the third bent plate, the requirement for safe collision can be met, functional structural parts can be installed, the weight reduction effect of a vehicle body is achieved through different wall thicknesses of the cavity, no inner plate is arranged on the upper portion of the B-column reinforcing plate, weight reduction of the vehicle body is achieved, and the weight reduction effect is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobiles, and in particular relates to a B-pillar assembly structure and an automobile. Background Art

[0002] With the rapid development of the new energy vehicle industry, consumers are increasingly concerned about vehicle power and fuel consumption. To meet these demands, there is a demand for lightweight vehicle bodies; the lighter the body frame, the more energy-efficient it is. Aluminum alloy, as a material for lightweight vehicle bodies, plays a crucial role in achieving this. Improving the lightweight performance of the body frame structure is an important factor in measuring vehicle performance indicators and a key factor in evaluating the performance of vehicle body development.

[0003] Traditional vehicle body frames are welded together from steel plates. The traditional B-pillar assembly is constructed from welded steel side panels, B-pillar reinforcements, B-pillar inner panels, upper and lower B-pillar hinge reinforcements, seatbelt retractor reinforcements, height adjuster reinforcements, and locknut plates. The upper portion of the B-pillar assembly is welded to the upper side sill reinforcement and upper inner panel, while the lower portion is welded to the sill beam. Traditional B-pillar assemblies are constructed from welded steel plates. As regulatory collision requirements continue to increase, along with obstacle avoidance and acceleration requirements, the thickness of the B-pillar reinforcements must be increased to improve side collision safety performance. This increases vehicle weight and impacts overall vehicle performance.

[0004] Therefore, in order to improve the performance and safety of the vehicle, a B-pillar assembly with lighter weight and higher structural strength is needed to enhance the consumer experience. Summary of the Invention

[0005] In view of the above problems, the present invention proposes a B-pillar assembly structure, including a B-pillar reinforcement plate, a side panel outer plate, a first bending plate and a second bending plate, wherein the side panel outer plate, the first bending plate and the second bending plate are sequentially connected to form a " " shaped cavity, the B-pillar reinforcement plate is installed in the " "-shaped cavity; the B-pillar reinforcement plate includes a cavity and a third bending plate connected to each other, the cavity and the third bending plate are installed in the " "-shaped cavity; the third bent plate is fixedly connected to the inner side of the second bent plate, and the cavity is fixedly connected to the first bent plate; the thickness of the wall of the cavity close to the side outer plate is less than the thickness of the wall of the cavity away from the side outer plate.

[0006] Furthermore, a reinforcing rib is provided on the inner side of the cavity, and the reinforcing rib is located on the inner wall of the cavity close to the first bent plate.

[0007] Furthermore, a first connecting bracket is fixedly connected to the third bent plate, and the first connecting bracket is fixedly connected to the inner wall of the second bent plate through a first screw.

[0008] Furthermore, the B-pillar assembly structure also includes a first reinforcement plate, one end of which is fixedly connected to a side of the cavity away from the side panel, and the other end of the first reinforcement plate is fixedly connected to the side beam tube beam of the vehicle.

[0009] Furthermore, the B-pillar assembly structure also includes a second reinforcement plate, one end of which is connected to the first bending plate and the third bending plate to form a cavity wrapping the cavity, and the other end of the second reinforcement plate is fixedly connected to the vehicle's door sill reinforcement plate.

[0010] Furthermore, a first mounting bracket is provided on the outer surface of the second reinforcement plate.

[0011] Furthermore, the outer surface of the B-pillar reinforcement plate is provided with a second hinge bracket, a third mounting bracket, a second mounting bracket and a first hinge bracket in sequence from top to bottom.

[0012] Furthermore, a fourth mounting bracket is provided on the outer surface of the cavity and the third bent plate, and a mounting hole is provided on the third bent plate, and the mounting hole is located below the fourth mounting bracket.

[0013] Furthermore, the cavity and the third bent plate are both made of aluminum alloy.

[0014] An automobile comprises a vehicle body and the above-mentioned B-pillar assembly structure, wherein the B-pillar reinforcement plate and the first reinforcement plate of the B-pillar assembly structure are both fixedly connected to the side beam tube beam of the vehicle body; and the B-pillar reinforcement plate and the second reinforcement plate of the B-pillar assembly structure are both fixedly connected to the door sill beam of the vehicle body.

[0015] Beneficial effects: 1. The B-pillar assembly structure of the present invention includes a B-pillar reinforcement plate, which is composed of a cavity and a third bent plate. It can not only meet the requirements of safe collision, but also install functional structural parts. The different wall thicknesses of the cavity achieve the effect of reducing the weight of the vehicle body. There is no inner plate on the upper part of the B-pillar reinforcement plate, which achieves the weight reduction of the vehicle body and achieves a lightweight effect.

[0016] 2. The B-pillar assembly structure of the present invention is an all-aluminum alloy structure. Compared with the traditional steel body frame structure, the aluminum alloy body frame structure achieves weight reduction and lightweight effect of the body. The B-pillar reinforcement plate is composed of a cavity and a third bent plate, and there is no need to add additional reinforcement plates, stiffening plates, hinge reinforcement plates and other structures. The structure of the B-pillar reinforcement plate achieves weight reduction and lightweight effect of the body; the structure of the cavity and the third bent plate can improve the energy absorption effect of the front structure of the body, avoid the bending of the front longitudinal beam when the front longitudinal beam structure collides and is subjected to force, and reduce the deformation of the passenger compartment.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the B-pillar assembly structure in an embodiment of the present invention is shown.

[0020] Figure 2 A schematic structural diagram of a side outer panel in an embodiment of the present invention is shown.

[0021] Figure 3 yes Figure 1 Schematic diagram of the cross section at AA.

[0022] Figure 4 yes Figure 1 Schematic diagram of the cross section at BB.

[0023] Figure 5 yes Figure 1 Schematic diagram of the cross section at CC.

[0024] Figure 6 yes Figure 1 Schematic diagram of the cross section at DD.

[0025] Figure 7 yes Figure 1 Schematic diagram of the cross section at EE.

[0026] Figure 8 Schematic diagram of the B-pillar reinforcement plate in an example of the present invention viewed from outside the vehicle to inside the vehicle.

[0027] Figure 9 Schematic diagram of the B-pillar reinforcement plate in an example of the present invention viewed from the inside of the vehicle to the outside of the vehicle.

[0028] Figure 10 Schematic diagram of the B-pillar reinforcement plate from the outside to the inside of the vehicle in an example of the present invention.

[0029] Figure 11 Schematic diagram of the B-pillar reinforcement plate from the inside to the outside of the vehicle in an example of the present invention.

[0030] Figure 12 This is a first angle schematic diagram of the B-pillar lower reinforcement plate assembly structure from the inside of the vehicle to the outside of the vehicle in an example of the present invention.

[0031] Figure 13 This is a second angle schematic diagram of the B-pillar lower reinforcement plate assembly structure from the inside of the vehicle to the outside of the vehicle in the example of the present invention.

[0032] Figure 14 Schematic diagram of the connection between the B-pillar reinforcement plate and the rocker beam from the outside to the inside of the vehicle in an example of the present invention.

[0033] In the figure, 1. first reinforcement plate; 2. B-pillar reinforcement plate; 3. second reinforcement plate; 4. first mounting bracket; 5. door sill beam; 6. side outer panel; 7. first bending plate; 8. second bending plate; 9. FDS self-tapping screw; 10. first connecting bracket; 11. first screw; 12. second connecting bracket; 13. second screw; 14. second mounting bracket; 15. third screw; 16. first hinge bracket; 17. side beam tube beam; 18. height adjuster mounting pin; 19. second hinge bracket; 20. sound insulation rubber block; 21. third mounting bracket; 22. fourth mounting bracket; 23. fifth mounting bracket; 24. door sill reinforcement plate; 201. cavity; 202. third bending plate; 203. reinforcement rib; 204. mounting hole. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] Traditional steel B-pillar assemblies are one-third heavier than aluminum alloy ones. This doesn't meet the lightweight design goals of the vehicle. The heavy frame consumes fuel and electricity, significantly shortening the vehicle's range and significantly impacting the driving experience. To improve vehicle performance and safety, the following design is recommended.

[0036] Example 1, refer to Figure 1 , a B-pillar assembly structure, including a B-pillar reinforcement plate 2, a side panel 6 (reference Figure 2 ), the first bending plate 7 and the second bending plate 8, the side outer plate 6, the first bending plate 7 and the second bending plate 8 are connected in sequence to form " "-shaped cavity (reference Figure 3 ), B-pillar reinforcement plate 2 is installed in the " In the shaped cavity, the B-pillar reinforcement plate 2 includes a cavity 201 and a third bending plate 202 connected to each other, and the cavity 201 and the third bending plate 202 are both installed in the " "-shaped cavity; the third bent plate 202 is fixedly connected to the inner side of the second bent plate 8, the protruding plate 201 of the cavity is fixedly connected to the first bent plate 7 (reference Figure 6 , that is, the protruding plate of the cavity 201 is fixedly connected to the first bent plate 7 and the second reinforcing plate 3 by the second screw 13); the thickness of the wall of the cavity 201 close to the side outer panel 6 is less than the thickness of the wall of the cavity 201 away from the side outer panel 6.

[0037] Furthermore, the side outer panel 6 and the B-pillar reinforcement plate 2 are both made of aluminum alloy, eliminating the B-pillar inner panel structure. The B-pillar reinforcement plate 2 is an aluminum alloy structure formed by a cavity 201 with different wall thicknesses and a third bent plate 202 (refer to Figure 4 ), the cavity 201 is formed by extrusion of aluminum alloy, and the third bent plate 202 formed integrally therewith is formed by 3D stamping and 3D bending of aluminum alloy; the wall thickness of the cavity 201 on the side close to the interior of the vehicle is relatively thick, and the wall thickness on the side close to the outside of the vehicle is also relatively thick (but the thickness of the wall close to the outside of the vehicle is less than the thickness of the wall close to the inside of the vehicle), and the wall thickness on both sides close to the front and rear doors is relatively thin, and the thickness of the third bent plate 202 is also relatively thin, the cavity 201 is close to the front door side, and the third bent plate 202 is close to the rear door side.

[0038] Specifically, the first reinforcement plate 1 is hydraulically formed from aluminum alloy, the B-pillar reinforcement plate 2 is extruded from aluminum alloy and then formed by 3D bending, 3D stamping, laser cutting and drilling, and 9 aluminum alloy brackets (first connecting bracket 10 and second connecting bracket 12) are welded on the B-pillar reinforcement plate 2; the bent plate (first bent plate 7 and second bent plate 8) is bent from aluminum alloy, the sill beam 5 and the aluminum alloy bent plate (first bent plate 7 and second bent plate 8) are connected to each other through 25 self-piercing rivets SPR two-layer plates, the B-pillar reinforcement plate 2 near the left and right front doors is connected to the bent plate (first bent plate 7 and second bent plate 8) by 6 M6 FDS and 3 M6X16 bolts, and the B-pillar reinforcement plate 2 near the left and right rear doors is connected to the aluminum alloy bent plate (first bent plate 7 and second bent plate 8) by 4 M6X16 bolts.

[0039] refer to Figure 4 A reinforcing rib 203 is provided inside the cavity 201, and the reinforcing rib 203 is located on the inner wall of the cavity 201 near the first bent plate 7. There is a reinforcing rib 203 on the side wall of the cavity 201 near the front door, and the reinforcing rib 203 runs through from top to bottom, which can enhance the effect of safety collision.

[0040] refer to Figure 5The first connecting bracket 10 is fixedly connected to the third bent plate 202, and the first connecting bracket 10 is fixedly connected to the inner wall of the second bent plate 8 by the first screw 11. Specifically, the connection strength is improved.

[0041] refer to Figure 8 The B-pillar assembly structure also includes a first reinforcement plate 1. One end of the first reinforcement plate 1 is fixedly connected to the side of the cavity 201 away from the side panel 6. The other end of the first reinforcement plate 1 is fixedly connected to the vehicle's side rail tube 17. Specifically, the first reinforcement plate 1 is formed by extrusion and cutting of aluminum alloy. The first reinforcement plate 1 is welded to the B-pillar reinforcement plate 2 using MIG (Metal Inert Gas Welding), and the upper portion of the first reinforcement plate 1 is welded to the side rail tube 17 using MIG (Metal Inert Gas Welding).

[0042] refer to Figure 12 The B-pillar assembly structure further includes a second reinforcing plate 3, one end of which is connected to the first bending plate 7 and the third bending plate 202 (reference Figure 6 ), forming a cavity surrounding the cavity 201. The other end of the second reinforcement plate 3 is fixedly connected to the vehicle's rocker reinforcement plate 24. Specifically, the second reinforcement plate 3 is stamped from aluminum alloy. The second reinforcement plate 3 is connected to the B-pillar reinforcement plate 2 via six M6x16 bolts, and to the rocker beam 5 or rocker reinforcement plate 24 via five M6x16 bolts.

[0043] refer to Figure 12 and Figure 13 The outer surface of the second reinforcing plate 3 is provided with a first mounting bracket 4. The first mounting bracket 4 is connected to the interior panel, which increases the connection points with the interior panel and thus improves the strength of the connection with the interior panel.

[0044] refer to Figure 8 The outer surface of the B-pillar reinforcement plate 2 is sequentially provided with a second hinge bracket 19, a third mounting bracket 21, a second mounting bracket 14 and a first hinge bracket 16 from top to bottom (ie from the roof to the bottom of the vehicle).

[0045] Specifically, the B-pillar reinforcement plate 2 is riveted with four aluminum alloy brackets on the side near the rear door, each of which is riveted with two self-piercing rivets. A second hinge bracket 19 made of an aluminum alloy profile is MIG-welded to the B-pillar reinforcement plate 2. A first hinge bracket 16 made of an aluminum alloy profile is MIG-welded to the B-pillar reinforcement plate 2. A second mounting bracket 14 is MIG-welded to the B-pillar reinforcement plate 2, which is used to secure the lock catch. A third aluminum alloy mounting bracket 21 is welded to the B-pillar reinforcement plate 2, which is used to secure the limiter. Two circular holes, with diameters of 10 and 7, are opened at the bottom of the B-pillar reinforcement plate 2 for mounting sound insulation rubber blocks 20, improving the sound insulation effect.

[0046] Furthermore, four first mounting brackets 4 are SPR-riveted on the B-pillar reinforcement plate 2 , and each small bracket is riveted with two rivets. The small brackets are used to fix the B-pillar interior panel.

[0047] refer to Figure 9 A fourth mounting bracket 22 is provided on the outer surface of the cavity 201 and the third bending plate 202 , and a mounting hole 204 is provided on the third bending plate 202 , and the mounting hole 204 is located below the fourth mounting bracket 22 .

[0048] Furthermore, the B-pillar reinforcement plate 2MIG welded two aluminum alloy bushings, which are used to install the safety height adjuster, the B-pillar reinforcement plate 2MIG welded a fifth mounting bracket 23, the fifth mounting bracket 23 welded two nuts, the fifth mounting bracket 23 is used to fix the seat belt pull ring, and two rectangular holes are opened on the fifth mounting bracket 23 to fix the B-pillar interior panel; the B-pillar reinforcement plate 2MIG welded a fourth mounting bracket 22, the fourth mounting bracket 22 welded a nut, the nut of the fourth mounting bracket 22 is used to fix the seat belt retractor, and a mounting hole 204 is opened at the lower part of the B-pillar reinforcement plate 2 for installing the seat belt retractor, and in the process of side collision, the mounting hole 204 weakens the lower part of the B-pillar reinforcement plate 2 to absorb energy. The fourth mounting bracket 22 and the fifth mounting bracket 23 are both aluminum alloy profiles.

[0049] Furthermore, the cavity 201 and the third bent plate 202 are both made of aluminum alloy.

[0050] Specifically, the present invention aims to solve the problem of lightweighting the B-pillar assembly structure by optimizing its structure and materials. The all-aluminum alloy B-pillar assembly structure achieves the goal of lightweighting the vehicle body frame.

[0051] Example 2, The X, Y, and Z axes in the present invention represent the assembly direction of the B-pillar assembly structure on the vehicle, that is, they represent the front, back, left, right, up, and down positions. The X axis represents the front-to-back direction of the B-pillar assembly structure, the Y axis represents the inside-out direction of the B-pillar assembly structure, and the Z axis represents the up-down direction of the B-pillar assembly structure.

[0052] pass Figure 1As shown, the embodiment of the present invention shows a new type of all-aluminum alloy B-pillar assembly structure. The parts covered by the B-pillar assembly structure are: a first reinforcement plate 1, a B-pillar reinforcement plate 2, a second reinforcement plate 3, a first mounting bracket 4, the first mounting bracket 4 is a B-pillar interior panel mounting bracket; a door sill beam 5, a side panel outer panel 6, a first bending plate 7, a second bending plate 8, the first bending plate 7 and the second bending plate 8 are both aluminum alloys; FDS self-tapping screws 9, a first connecting bracket 10, a second connecting bracket 12, the first connecting bracket 10 and the second connecting bracket 12 are both aluminum alloys; a first screw 11 is a cross head hexagonal pan head screw; a second screw 13 is a cross slot hexagonal pan head screw; a second mounting bracket 14 is an aluminum alloy front door lock mounting bracket; a third screw 15 is a cross slot hexagonal pan head screw; a first hinge bracket 16 is an aluminum alloy lower hinge mounting bracket; a side beam tube beam 17 is made of aluminum alloy; a high adjuster mounting shaft pin 18 (reference Figure 9 ) is made of aluminum alloy; the second hinge bracket 19 is an aluminum alloy upper hinge mounting bracket; the sound insulation rubber block 20; the third mounting bracket 21 is an aluminum alloy limiter mounting bracket; the fourth mounting bracket 22 is an aluminum alloy seat belt pull ring mounting bracket; the fifth mounting bracket 23 is an aluminum alloy seat belt retractor mounting bracket; the door sill reinforcement plate 24 is made of aluminum alloy; The side outer panel 6 is connected to the first bent plate 7 and the second bent plate 8 through SPR, where SPR (Self-Piercing Rivet) is an advanced mechanical connection technology, mainly used for high-strength, permanent connections between metal plates, especially in the connection of lightweight materials such as aluminum alloy and high-strength steel.

[0053] Furthermore, both the side panel 6 and the B-pillar reinforcement plate 2 are made of aluminum alloy, achieving lightweighting. The elimination of the B-pillar inner panel reduces the number of parts and also achieves the goal of reducing vehicle weight. The B-pillar assembly structure consists of the side panel 6, the B-pillar reinforcement plate 2, the aluminum alloy bent plates (first bent plate 7, second bent plate 8), the second reinforcement plate 3, and the first reinforcement plate 1, connected by FDS self-tapping screws 9, SPR, and bolts. The B-pillar stop is formed by riveting the side panel 6, the first bent plate 7, and the second bent plate 8 together using SPR. Without the avoidance structure of multiple layers of panels, the stop thickness is uniform, which is beneficial for sealing the door opening. This aluminum alloy B-pillar assembly structure is significantly lighter than a steel B-pillar assembly.

[0054] Furthermore, the B-pillar reinforcement plate 2 is connected to the first bent plate 7 by 6 FDS self-tapping screws 9 (refer to Figure 10 ), the B-pillar reinforcement plate 2 is connected to the second bent plate 8 by four first screws 11 (refer to Figure 11); The B-pillar reinforcement plate 2 is connected to the first reinforcement plate 1 through three aluminum alloy MIG welds, the first reinforcement plate 1 is connected to the side beam tube beam 17 through two MIG welds, the B-pillar reinforcement plate 2 is connected to the side beam tube beam 17 through one MIG weld, the second reinforcement plate 3 is connected to the B-pillar reinforcement plate 2 through six third screws 15, two first connecting brackets 10 are welded to the B-pillar reinforcement plate 2, the B-pillar reinforcement plate 2 is connected to the first connecting bracket 10 through two SPRs (self-piercing rivets), and the first connecting bracket 10 is connected to the second bent plate 8 through one.

[0055] Furthermore, a nut is welded on the first reinforcement plate 1 for mounting the interior panel of the B-pillar, two aluminum alloy threaded height adjuster mounting shaft pins 18 are welded on the B-pillar reinforcement plate 2 for mounting the height adjuster of the seat belt, and two second connecting brackets 12 are welded on the B-pillar reinforcement plate 2 (refer to Figure 6 ), the B-pillar reinforcement plate 2 is connected to the two second connecting brackets 12 by SPR (self-piercing riveting), the second connecting bracket 12 is connected to the second bent plate 8 by a third screw 15, a second hinge bracket 19 is MIG welded on the B-pillar reinforcement plate 2, a third mounting bracket 21 is MIG welded on the B-pillar reinforcement plate 2, a second mounting bracket 14 is MIG welded on the B-pillar reinforcement plate 2, and a first hinge bracket 16 is MIG welded on the B-pillar reinforcement plate 2 (reference Figure 7 ), a sound insulation rubber block 20 is assembled at the lower part of the B-pillar reinforcement plate 2.

[0056] Furthermore, the third bent plate 202 on the B-pillar reinforcement plate 2 is MIG-welded to the fourth mounting bracket 22, a fifth mounting bracket 23 is MIG-welded to the B-pillar reinforcement plate 2, four first mounting brackets 4 are welded to the second reinforcement plate 3, each first mounting bracket 4 is connected by two SPRs, and the third bent plate 202 is MIG-welded to the door sill beam 5. Figure 14 The lower portion of the second bent plate 8 is connected to the sill beam 5 via an FDS self-tapping screw 9. The first bent plate 7 is connected to the sill beam 5 via an FDS self-tapping screw 9. The sill reinforcement plate 24 is MIG welded to the sill beam 5. The second reinforcement plate 3 is connected to the sill reinforcement plate 24 using five third screws 15. Four first mounting brackets 4 are welded to the second reinforcement plate 3, and the second reinforcement plate 3 and the first mounting bracket 4 are connected using two SPRs.

[0057] Example 3, An automobile comprises a vehicle body and a B-pillar assembly structure according to Example 1 or Example 2. The B-pillar reinforcement plate 2 and the first reinforcement plate 1 of the B-pillar assembly structure are both fixedly connected to the vehicle body's side rail tube beam 17; and the B-pillar reinforcement plate 2 and the second reinforcement plate 3 of the B-pillar assembly structure are both fixedly connected to the vehicle body's rocker beam 5. This aluminum alloy B-pillar assembly structure can be applied not only to all-aluminum alloy sports car bodies, but also to SUVs, sedans, and MPVs, achieving the goal of reducing vehicle weight and lightening.

[0058] Although the present invention 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 make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A B-pillar assembly structure, characterized in that: It comprises a B-pillar reinforcement plate (2), a side outer plate (6), a first bent plate (7) and a second bent plate (8), wherein the side outer plate (6), the first bent plate (7) and the second bent plate (8) are sequentially connected to form a "-shaped cavity, the B-pillar reinforcement plate (2) is installed in the" "-shaped cavity; the B-pillar reinforcement plate (2) comprises a cavity (201) and a third bent plate (202) connected to each other, the cavity (201) and the third bent plate (202) are both installed in" "-shaped cavity; the third bent plate (202) is fixedly connected to the inner side of the second bent plate (8); the cavity (201) is fixedly connected to the first bent plate (7); the thickness of the wall of the cavity (201) on the side close to the side outer plate (6) is smaller than the thickness of the wall of the cavity (201) on the side away from the side outer plate (6).

2. The B-pillar assembly structure according to claim 1, characterized in that: A reinforcing rib (203) is provided on the inner side of the cavity (201), and the reinforcing rib (203) is located on the inner wall of the cavity (201) close to the first bending plate (7).

3. The B-pillar assembly structure according to claim 1, characterized in that: A first connecting bracket (10) is fixedly connected to the third bent plate (202), and the first connecting bracket (10) is fixedly connected to the inner wall of the second bent plate (8) via a first screw (11).

4. The B-pillar assembly structure according to claim 1, characterized in that: The B-pillar assembly structure further comprises a first reinforcement plate (1), one end of the first reinforcement plate (1) being fixedly connected to a side of the cavity (201) away from the side panel (6), and the other end of the first reinforcement plate (1) being fixedly connected to a side beam tube beam (17) of the vehicle.

5. The B-pillar assembly structure according to claim 1, characterized in that: The B-pillar assembly structure further comprises a second reinforcing plate (3), one end of the second reinforcing plate (3) being connected to the first bending plate (7) and the third bending plate (202) to form a cavity that wraps the cavity (201), and the other end of the second reinforcing plate (3) being fixedly connected to the vehicle's door sill reinforcing plate (24).

6. The B-pillar assembly structure according to claim 5, characterized in that: A first mounting bracket (4) is provided on the outer surface of the second reinforcement plate (3).

7. The B-pillar assembly structure according to claim 1, characterized in that: The outer surface of the B-pillar reinforcement plate (2) is provided with a second hinge bracket (19), a third mounting bracket (21), a second mounting bracket (14) and a first hinge bracket (16) in sequence from top to bottom.

8. The B-pillar assembly structure according to claim 1, characterized in that: A fourth mounting bracket (22) is provided on the outer surfaces of the cavity (201) and the third bent plate (202), and a mounting hole (204) is provided on the third bent plate (202), wherein the mounting hole (204) is located below the fourth mounting bracket (22).

9. The B-pillar assembly structure according to any one of claims 1 to 8, characterized in that: The cavity (201) and the third bent plate (202) are both made of aluminum alloy.

10. An automobile, comprising a vehicle body and a B-pillar assembly structure according to any one of claims 1 to 9, wherein the B-pillar reinforcement plate (2) and the first reinforcement plate (1) of the B-pillar assembly structure are both fixedly connected to the side beam tube beam (17) of the vehicle body; and the B-pillar reinforcement plate (2) and the second reinforcement plate (3) of the B-pillar assembly structure are both fixedly connected to the door sill beam (5) of the vehicle body.

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