Body pillar structure assembly and vehicle

Abstract

This application provides a vehicle body pillar structure assembly and a vehicle, belonging to the field of upper body architecture technology. By setting support reinforcement plates in the C-pillar and D-pillar areas, and combining the connection layout of the C-pillar unit, the D-pillar inner panel unit, and the D-pillar reinforcement plate unit, the structure of the C-pillar and D-pillar areas is strengthened, ultimately playing a positive role in improving the torsional stiffness of the rear area of ​​the vehicle body. By forming a third cavity between the side outer panel and the D-pillar reinforcement plate unit, a three-layer nested cavity structure is formed, further increasing the moment of inertia of the section to improve bending stiffness and the ability to distribute loads, thereby improving impact and torsional performance. Utilizing the space on the support reinforcement plate, the installation function of the tailgate strut is integrated, and the reinforcement effect of the support reinforcement plate further improves the assembly strength of the tailgate strut, which is beneficial to further improving the torsional stiffness of the rear of the vehicle body.

Description

Technical Field

[0001] This application belongs to the field of vehicle body structure technology, and more specifically, relates to a vehicle body pillar structure assembly and a vehicle. Background Technology

[0002] Torsional stiffness of a vehicle body is a crucial indicator of its ability to resist torsional deformation, profoundly impacting overall vehicle performance such as handling, comfort, safety, and durability. For example, insufficient stiffness causes body torsion to interfere with the suspension, altering tire contact characteristics and affecting grip and cornering limits (e.g., understeer or oversteer). High torsional stiffness, on the other hand, reduces body torsional deformation on curves or uneven surfaces, maintaining stable wheel alignment parameters (such as camber and toe), and improving steering response and precision. Furthermore, a low-stiffness body is prone to resonance due to road surface excitation or powertrain vibrations, amplifying cabin noise and low-frequency vibrations. Torsional deformation can also lead to friction between sheet metal parts or connecting components, generating abnormal noises and reducing ride comfort.

[0003] In the existing vehicle body structure, it is difficult to further improve the torsional stiffness of the rear of the vehicle body, which leads to instability of the chassis during driving, affecting the driving experience and safety. Utility Model Content

[0004] The purpose of this application is to provide a vehicle body pillar structure assembly and a vehicle, which aims to solve the problem that it is difficult to improve the torsional stiffness of the rear of the vehicle body in existing vehicles.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a vehicle body pillar structure assembly, including:

[0007] C-pillar unit, D-pillar inner panel unit, D-pillar reinforcing plate unit, and supporting reinforcing plate;

[0008] The C-pillar unit is connected to the front side of the D-pillar inner panel unit, and the D-pillar reinforcing plate unit is connected to the outside of the C-pillar unit and the D-pillar inner panel unit. The C-pillar unit, the D-pillar inner panel unit, and the D-pillar reinforcing plate unit together form the D-pillar inner cavity.

[0009] The supporting reinforcement plate is disposed in the inner cavity of the D-pillar and is supported and connected between the inner plate unit of the D-pillar and the reinforcing plate unit of the D-pillar. The supporting reinforcement plate divides the inner cavity of the D-pillar into a first cavity and a second cavity.

[0010] For vehicle models such as SUVs, the rear part of the vehicle body mainly includes the trunk and the area where the rear suspension is located, and has connection points for connecting components such as the rear suspension and the back door strut. If the design of this area is unreasonable, it is easy to form a stiffness mutation area, resulting in stress concentration. The body pillars (including the C-pillar and D-pillar at the rear of the vehicle body) and the roof longitudinal beam, the sill beam, the floor cross beam, etc. together form the "cage structure" of the passenger compartment. By rigidly connecting each part into a whole, a closed force loop is formed, which is an important structure affecting the torsional resistance performance of the vehicle body. The existing body pillars generally adopt an assembly scheme of welding two sheet metal parts in an inner-outer mating manner. After mating, a beam structure with a closed cavity is formed. The sheet metal parts usually adopt open sections (such as sheet metal parts with a C-shaped or U-shaped cross section). The torsional resistance performance of the sheet metal parts themselves is relatively weak, directly affecting the performance such as the strength of the beam structure, and it is difficult to further improve the performance of the pillars, thereby making it difficult to improve the torsional resistance performance of the rear part of the vehicle body.

[0011] To solve the above problems, the solution shown in the embodiments of the present application has the following beneficial effects compared with the prior art: First, the D-pillar reinforcement plate unit is connected to the outside of the C-pillar unit which is connected to the D-pillar inner plate unit. In addition to meeting the requirements for forming the D-pillar, it also makes the connection between the D-pillar and the C-pillar closer, enhances the integrity of the C-pillar and the D-pillar, and thus plays a role in strengthening the area where the C-pillar and the D-pillar are located. Second, by setting a support reinforcement plate in the inner cavity of the D-pillar, it strengthens the connection between the C-pillar unit and the D-pillar reinforcement plate unit and the connection between the D-pillar inner plate unit and the D-pillar reinforcement plate unit, enhances the bearing capacity in the inner-outer direction, and thus can effectively inhibit the buckling of the side wall of the beam structure, especially more effective when承受压缩或扭转载荷时更为有效,最终起到提升C柱和D柱所在区域的结构强度的作用。承受压缩或扭转载荷时更为有效,最终起到提升C柱和D柱所在区域的结构强度的作用。承受压缩或扭转载荷时更为有效and ultimately plays a role in enhancing the structural strength of the area where the C-pillar and the D-pillar are located. Third, since the support reinforcement plate divides the inner cavity of the D-pillar into a first cavity and a second cavity, forming a "day" - shaped multi-cavity structure, it can significantly increase the moment of inertia of the cross section, thereby enhancing the flexural rigidity; and the multi-cavity design can play a role in dispersing loads, further enhancing the impact resistance and torsional resistance performance.

[0012] Generally speaking, the body pillar structure assembly of the present application realizes the structural strengthening of the C-pillar and D-pillar areas by setting support reinforcement plates in the C-pillar and D-pillar areas and combining the connection layout of the C-pillar unit, the D-pillar inner plate unit and the D-pillar reinforcement plate unit, and ultimately improves the torsional stiffness of the rear part of the vehicle body.

[0013] Combined with the first aspect, in a possible implementation manner, the body pillar structure assembly further includes an outer side panel, and the outer side panel is arranged outside the C-pillar unit, the D-pillar inner plate unit and the D-pillar reinforcement plate unit, and a third cavity is formed between the D-pillar reinforcement plate unit and the outer side panel.

[0014] In the aforementioned technical solution, the side panel, as the core framework of the rear side wall of the vehicle, provides roof support, ensures overall rigidity, provides fixed positions for the side doors and windshields, ensures smooth door opening and closing and the airtightness of the passenger space, and can also enhance the vehicle's visual aesthetics through surface styling design, forming unique body lines and character. Furthermore, a third cavity is formed between the side panel and the D-pillar reinforcement unit, creating a three-layer nested cavity structure. This further increases the moment of inertia of the cross-section, improving bending stiffness and enhancing the ability to distribute loads, thereby improving impact and torsional resistance. Ultimately, this further strengthens the structure of the C-pillar and D-pillar areas.

[0015] In conjunction with the first aspect, in one possible implementation, the rear of the supporting reinforcement plate is provided with a strut connection position, the tailgate strut can be connected to the strut connection position, the body pillar structure assembly further includes an upper section of the rear drainage channel, the upper section of the rear drainage channel is located on the rear side of the D-pillar reinforcement plate unit, and the upper section of the rear drainage channel, the D-pillar reinforcement plate unit and the supporting reinforcement plate are stacked and connected;

[0016] The first cavity and the second cavity are distributed along the front-back direction to provide support for the strut in the front-back direction.

[0017] In the above technical solution, the space on the support reinforcement plate is used to integrate the installation function of the tailgate strut. The reinforcement effect of the support reinforcement plate is used to further improve the assembly strength of the tailgate strut, which is conducive to further improving the torsional rigidity of the rear of the vehicle body.

[0018] In some embodiments, the D-pillar inner panel unit includes a D-pillar inner panel and a roof rear crossbeam connecting plate connected sequentially from bottom to top, and the front side of the D-pillar inner panel and the front side of the roof rear crossbeam connecting plate are both connected to the rear side of the C-pillar unit.

[0019] The supporting reinforcement plate has a box-shaped structure with an opening on one side, which is located on the outer side of the top of the inner panel of the D-pillar; the edge of the opening side of the supporting reinforcement plate is bent to form a supporting reinforcement flange, which is attached to the inner panel of the D-pillar and also attached to the connecting plate of the rear crossbeam of the top cover.

[0020] In the above technical solution, the support reinforcement plate has a box-shaped structure with high structural strength, which can provide reliable support and reinforcement. It is located on the outer side of the top of the D-pillar inner panel. This area is the weak area of ​​the D-pillar reinforcement plate unit. Setting the support reinforcement plate in this position can provide precise support and facilitate assembly with the rear door support rod.

[0021] In conjunction with the first aspect, in one possible implementation, the vehicle body pillar structure assembly further includes wheel arch panels;

[0022] The top of the D-pillar inner panel unit has a first extension end that connects to the rear crossbeam of the roof, the top of the C-pillar unit has a second extension end that connects to the rear section of the B-pillar inner panel, and the lower end of the D-pillar inner panel unit is also connected to the wheel arch plate.

[0023] The top of the D-pillar reinforcing plate unit has a first extension end of the reinforcing plate connected to the first extension end of the inner plate, and a second extension end of the reinforcing plate connected to the second extension end of the inner plate. The lower end of the D-pillar reinforcing plate unit is also connected to the wheel cover plate.

[0024] The first extension end of the inner panel and the first extension end of the reinforcing plate cooperate to form a first end force transmission cavity that transmits force to the rear crossbeam of the roof, and the second extension end of the inner panel and the second extension end of the reinforcing plate cooperate to form a second end force transmission cavity that transmits force to the rear section of the inner panel of the B-pillar.

[0025] In the above technical solution, by forming a Y-shaped force transmission and diversion channel at the top of the C and D pillars, a complete annular force transmission channel is constructed in this area. The vibration energy of the shock absorber can be transmitted to the B pillar, A pillar, front crossbeam of the top cover, and rear crossbeam of the top cover through this area, effectively dispersing stress.

[0026] In some embodiments, the D-pillar reinforcement plate unit includes an upper section of the D-pillar reinforcement plate and a lower section of the D-pillar reinforcement plate connected sequentially from top to bottom. The lower end of the lower section of the D-pillar reinforcement plate is connected to the wheel cover plate, and the top of the upper section of the D-pillar reinforcement plate forms the first extension end and the second extension end of the reinforcement plate.

[0027] The rear side of the upper section of the D-pillar reinforcement plate forms a first channel facade and a second channel facade distributed sequentially from top to bottom. The first channel facade and the second channel facade are set at an angle, and the second channel facade is inclined forward to connect with the lower section of the D-pillar reinforcement plate. The body pillar structure assembly also includes an upper section of the rear water channel, which is fitted and connected to the first channel facade.

[0028] In the above technical solution, the D-pillar reinforcing plate unit is divided into an upper section and a lower section. The upper and lower sections are molded separately according to different connection requirements, resulting in a more flexible structural design. Furthermore, a first channel facade is provided to achieve a snug connection with the upper section of the rear drainage channel, and a second channel facade is provided to achieve a connection with the lower section of the D-pillar reinforcing plate, fully meeting assembly requirements.

[0029] In some embodiments, a rear crossbeam connecting reinforcement plate is connected to the first extension end of the inner plate, and the rear crossbeam connecting reinforcement plate is used to connect with the rear crossbeam of the top cover.

[0030] In the above technical solution, by setting a rear crossbeam connecting reinforcement plate, support is formed in the overlapping area of ​​the two, which prevents the collapse of the rear crossbeam plate of the top cover, and at the same time improves the structural strength of the area.

[0031] In some embodiments, the C-pillar unit includes a C-pillar inner panel and a C-pillar reinforcing plate connected sequentially from top to bottom, and the D-pillar inner panel unit and the D-pillar reinforcing plate unit are respectively connected to the C-pillar inner panel;

[0032] The vehicle body pillar structure assembly also includes a wheel arch plate, and the C-pillar reinforcing plate is fitted and connected to the outer side of the front part of the wheel arch plate, and the two together form a C-pillar force transmission cavity.

[0033] In the above technical solution, when the sill beam is subjected to a side impact, the force can be transmitted upward to the inner plate of the upper C-pillar through the force transmission channel formed by the C-pillar force transmission cavity, and then further transmitted to the rear crossbeam of the roof, B-pillar and other structures through the inner plate of the C-pillar. The force can be effectively transmitted and dispersed, improving the side impact bearing capacity.

[0034] In some embodiments, a fourth cavity is formed between the C-pillar reinforcing plate and the side outer panel, and the fourth cavity is in communication with the third cavity.

[0035] In the above technical solution, the side panel forms an integral cavity structure on the outside of the C-pillar and D-pillar. The D-pillar reinforcement plate unit, the support reinforcement plate and the C-pillar reinforcement plate are divided into multiple layers within the cavity structure to form a multi-layer composite wall structure for the C-pillar and D-pillar. This helps to further improve the torsional stiffness of the rear of the vehicle and the strength of key mounting points (including shock absorber mounting points and tailgate strut mounting points), thereby improving the vehicle's driving stability and durability.

[0036] Secondly, embodiments of this application also provide a vehicle including the aforementioned body pillar structure assembly.

[0037] Compared with the prior art, the solution shown in this application embodiment effectively improves the torsional stiffness of the rear area of ​​the vehicle body by adopting the above-mentioned body pillar structure assembly, and ultimately improves the torsional stiffness of the whole vehicle. This has an improving effect on steering response and accuracy, reducing abnormal noises at the rear of the vehicle body, effectively improving the phenomenon of chassis instability during vehicle driving, and improving driving experience and safety. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic front view of the vehicle body pillar structure assembly provided in this application embodiment. Figure 1 ;

[0040] Figure 2 for Figure 1 BB cross-sectional view;

[0041] Figure 3 for Figure 1 CC section view;

[0042] Figure 4 for Figure 1 DD sectional view;

[0043] Figure 5 A schematic front view of the vehicle body pillar structure assembly provided in this application embodiment. Figure 2 The side panel is not shown.

[0044] Figure 6 A schematic front view of the vehicle body pillar structure assembly provided in this application embodiment. Figure 3 The outer side panels and the upper section of the rear drainage channel are not shown.

[0045] Figure 7 for Figure 6 AA section view;

[0046] Figure 8 A perspective view of the vehicle body pillar structure assembly provided in the embodiments of this application, wherein the side panel outer panel, the upper section of the rear water channel and the D-pillar reinforcement plate unit are not shown;

[0047] Figure 9 Exploded view of the vehicle body pillar structure assembly provided in the embodiments of this application;

[0048] Figure 10 This is a partial assembly diagram of the C-pillar reinforcing plate, wheel arch plate, and C-pillar inner plate used in the embodiments of this application;

[0049] Figure 11 This is an assembly cross-sectional view of the inner panel of the C-pillar, the upper part of the reinforcing plate of the D-pillar, and the rear part of the inner panel of the B-pillar used in the embodiments of this application.

[0050] Figure 12 This is an assembly cross-sectional view of the rear crossbeam connecting plate and the rear crossbeam plate of the top cover used in the embodiments of this application.

[0051] In the diagram: 1. C-column unit; 101. Second extension end of inner panel; 110. C-column inner panel; 120. C-column reinforcing plate; 2. D-column inner panel unit; 201. First extension end of inner panel; 210. D-column inner panel; 220. Rear crossbeam connecting plate of roof cover; 3. D-column reinforcing plate unit; 301. First extension end of reinforcing plate; 302. Second extension end of reinforcing plate; 310. Upper part of D-column reinforcing plate; 311. First passageway elevation; 312. Second passageway elevation; 320. D-column reinforcing plate Lower section; 330, B-pillar connecting reinforcement plate; 4, support reinforcement plate; 401, strut connection position; 410, support reinforcement flange; 5, first cavity; 6, second cavity; 7, side outer panel; 8, third cavity; 9, upper section of rear water channel; 10, wheel cover plate; 1010, wheel cover outer panel; 1020, wheel cover inner panel; 11, rear crossbeam plate of top cover; 12, rear crossbeam connecting reinforcement plate; 13, C-pillar force transmission cavity; 14, fourth cavity; 15, top cover; 16, rear section of B-pillar inner panel. Detailed Implementation

[0052] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0053] It should be noted that when a component is referred to as being "set on" another component, it can be directly on the other component or indirectly on that other component.

[0054] It should be understood that the terms "upper" and "lower" refer to the vertical direction of the vehicle body, "front" and "rear" refer to the longitudinal direction of the vehicle body, "left" and "right" refer to the left and right direction of the vehicle body, and "inner" refers to the direction towards the passenger compartment, while "outer" refers to the opposite direction. Other terms, unless otherwise specified, such as "length," "width," "top," and "bottom," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0056] The implementation manners of the term "fitting connection" include but are not limited to fitting welding, connecting by threaded connectors after fitting, etc.

[0057] Please refer to Figures 1 to 12 , and the body pillar structure assembly provided by the present application will be described below. The body pillar structure assembly includes a C-pillar unit 1, a D-pillar inner panel unit 2, a D-pillar reinforcement panel unit 3, and a support reinforcement panel 4; the C-pillar unit 1 is connected to the front side of the D-pillar inner panel unit 2, the D-pillar reinforcement panel unit 3 is connected to the outer sides of the C-pillar unit 1 and the D-pillar inner panel unit 2, and the C-pillar unit 1, the D-pillar inner panel unit 2, and the D-pillar reinforcement panel unit 3 enclose to form a D-pillar inner cavity; the support reinforcement panel 4 is disposed in the D-pillar inner cavity and is supported and connected between the D-pillar inner panel unit 2 and the D-pillar reinforcement panel unit 3, and the support reinforcement panel 4 divides the D-pillar inner cavity into a first cavity 5 and a second cavity 6. Among them, both the first cavity 5 and the second cavity 6 are closed cavities, and in a cross-section perpendicular to the preset direction, the first cavity 5 and the second cavity 6 cooperate to form a double-cavity structure in the shape of a "day" character. The preset direction refers to the direction perpendicular to the left-right direction and perpendicular to the distribution path of the first cavity 5 and the second cavity 6. In this embodiment, an example where the up-down direction is the preset direction is exemplarily shown.

[0058] It should be noted that this embodiment shows the body pillar structure assembly located on the left side of the vehicle body. The body pillar structure assemblies on the left and right sides of the vehicle body are symmetrically arranged and will not be elaborated here.

[0059] Taking the cavity formed inside the support reinforcement panel 4 as the first cavity 5 as an example, the distribution of the first cavity 5 and the second cavity 6 will be described here: the distribution path between the first cavity 5 and the second cavity 6 can be distributed along the front-back direction, or along the up-down direction, or along other paths. The other paths form an angle with both the front-back direction and the up-down direction. As long as a double-cavity structure in the shape of a "day" character is formed, it can play a strengthening role.

[0060] In addition, taking the distribution path of the first cavity 5 and the second cavity 6 as the preset path, in the direction perpendicular to the preset path and perpendicular to the left-right direction, the length of the first cavity 5 is not greater than the length of the second cavity 6, that is, the support reinforcement panel 4 is always within the coverage range of the D-pillar reinforcement panel unit 3 and will not protrude outside the D-pillar reinforcement panel unit 3. Figure 8The illustrated embodiment shows an example where the first cavity 5 is located behind the second cavity 6, and the length of the first cavity 5 in the up-and-down direction is less than that of the second cavity 6. At this time, the support reinforcement plate 4 is required to block both ends of the first cavity 5 in the length direction of the first cavity 5; if the length of the first cavity 5 is equal to the length of the second cavity 6, both ends of the support reinforcement plate 4 extend to the corresponding inner walls of the D-pillar inner cavity. It should be understood that since the D-pillar reinforcement plate unit 3 covers the support reinforcement plate 4, based on the relatively small length of the first cavity 5, the coverage range of the second cavity 6 also extends above and below the first cavity 5.

[0061] In this embodiment, in order to form the D-pillar inner cavity, the D-pillar reinforcement plate unit 3 is an arched sheet metal structure, and its edge forms a reinforcement plate connecting flange, so that the cross-section of the D-pillar reinforcement plate unit 3 is in a "U" shape. Among them, the front reinforcement plate connecting flange is adhesively connected to the C-pillar unit 1, and the rear reinforcement plate connecting flange is adhesively connected to the D-pillar inner plate unit 2.

[0062] For models such as SUVs, the rear part of the vehicle body mainly includes the trunk and the area where the rear suspension is located, and has connection points for connecting components such as the rear suspension and the back door strut. If the design of this area is unreasonable, it is easy to form a stiffness mutation area, resulting in stress concentration. The body pillars (including the C-pillar and D-pillar at the rear of the vehicle body) and the roof longitudinal beam, the sill beam, the floor cross beam, etc. together constitute the "cage structure" of the passenger compartment, and are combined into a whole through rigid connections to form a closed force loop, which is an important structure affecting the torsional resistance performance of the vehicle body. The existing body pillars generally adopt an assembly scheme of welding two sheet metal parts inside and outside in alignment. After alignment, a beam structure with a closed cavity is formed. The sheet metal parts usually adopt an open cross-section (such as a sheet metal part with a C-shaped or U-shaped cross-section). The torsional resistance performance of the sheet metal part itself is relatively weak, which directly affects the performance such as the strength of the beam structure, and it is difficult to further improve the performance of the pillar, and thus the improvement of the torsional resistance performance of the rear part of the vehicle body encounters a bottleneck.

[0063] To solve the above problems, the body pillar structure assembly provided by the present application has the following beneficial effects compared with the prior art: First, the D-pillar reinforcement plate unit 3 is connected to the outer sides of the C-pillar unit 1 and the D-pillar inner panel unit 2. In addition to meeting the requirements for forming the D-pillar, it also makes the connection between the D-pillar and the C-pillar closer, enhances the integrity of the C-pillar and the D-pillar, and thus plays a role in strengthening the area where the C-pillar and the D-pillar are located. Second, by arranging the support reinforcement plate 4 in the D-pillar cavity, it strengthens the connection between the C-pillar unit 1 and the D-pillar reinforcement plate unit 3 and the connection between the D-pillar inner panel unit 2 and the D-pillar reinforcement plate unit 3, enhances the bearing capacity in the inner and outer directions, and thus can effectively inhibit the buckling of the side wall of the beam structure, especially more effective when承受 compression or torsional loads, and ultimately plays a role in enhancing the structural strength of the area where the C-pillar and the D-pillar are located. Third, since the support reinforcement plate 4 divides the D-pillar cavity into the first cavity 5 and the second cavity 6, forming a double-cavity structure in the shape of "日", it can significantly increase the section moment of inertia, thereby enhancing the flexural rigidity; and the multi-cavity design can play a role in dispersing loads, further enhancing the impact resistance and torsional resistance performance.

[0064] Generally speaking, the body pillar structure assembly of the present application realizes the structural strengthening of the C-pillar and D-pillar areas by arranging the support reinforcement plate 4 in the C-pillar and D-pillar areas and combining the connection layout of the C-pillar unit 1, the D-pillar inner panel unit 2 and the D-pillar reinforcement plate unit, and finally enhances the torsional rigidity of the rear area of the vehicle body. In addition, the strengthening of the C-pillar and D-pillar areas also realizes the strengthening of the rear shock absorber mounting point and the rear door strut mounting point, enhances the assembly strength of structures such as the shock absorber and the rear door strut, and is also beneficial to enhancing the torsional rigidity of the rear area of the vehicle body.

[0065] In some embodiments, referring to Figures 1 to 3 and Figure 9 , the body pillar structure assembly further includes an outer side panel 7, which is arranged on the outer sides of the C-pillar unit 1, the D-pillar inner panel unit 2 and the D-pillar reinforcement plate unit, and a third cavity 8 is formed between the D-pillar reinforcement plate unit 3 and the outer side panel 7. Among them, the third cavity 8 is a closed cavity; in addition, since the D-pillar reinforcement plate unit 3 is within the coverage of the outer side panel 7, the lengths of the first cavity 5 and the second cavity 6 are both not greater than the length of the third cavity 8.

[0066] The outer side panel 7 serves as the core framework of the rear side wall of the vehicle body, provides support for the roof panel 15, ensures the overall rigidity, can provide fixed positions for the side door and windshield glass, ensures smooth opening and closing of the door and the sealing of the driving space, and can also enhance the visual aesthetic feeling of the vehicle through surface styling design, forming unique body lines and temperament. On this basis, a third cavity 8 is formed between the outer side panel 7 and the D-column reinforcement plate unit 3, forming a three-layer nested cavity structure, further increasing the sectional moment of inertia to enhance the flexural stiffness, further enhancing the ability to disperse loads, so as to enhance the impact resistance and torsional resistance, and finally, further strengthen the structure of the C-column and D-column regions.

[0067] Optionally, the D-column reinforcement plate unit 3 is arranged closer to the rear of the outer side panel 7. In the cross-section perpendicular to the aforementioned preset direction, the first cavity 5, the second cavity 6 and the third cavity 8 cooperate to form a three-cavity structure in the shape of "eye", as Figure 2 shown.

[0068] In some embodiments, referring to Figures 1 to 3 , Figures 5 to 9 , a strut connection position 401 is formed at the rear of the support reinforcement plate 4. The back door strut can be connected to the strut connection position 401. The vehicle body column structure assembly further includes the upper rear water trough 9. The upper rear water trough 9 is located behind the D-column reinforcement plate unit 3. The upper rear water trough 9, the D-column reinforcement plate unit 3 and the support reinforcement plate 4 are stacked and connected; the first cavity 5 and the second cavity 6 are distributed in the front-rear direction to support the strut in the front-rear direction. In this embodiment, the space on the support reinforcement plate 4 is utilized to realize the integration of the installation function of the back door strut. By using the strengthening effect of the support reinforcement plate 4, the assembly strength of the back door strut is further enhanced, which is beneficial to further enhancing the torsional stiffness of the rear part of the vehicle body.

[0069] Optionally, if the outer side panel 7 is provided on the outer sides of the C-column unit 1, the D-column inner panel unit 2 and the D-column reinforcement plate unit 3, and a third cavity 8 is formed between the D-column reinforcement plate unit 3 and the outer side panel 7, then a triple cavity structure capable of transmitting force in the up-down direction is formed on the inner side of the outer side panel 7, which can guide the force at the rear part of the vehicle body upward and conduct it forward (for example, to the B-column area) through the longitudinal beam at the top of the vehicle body, and can also conduct it to the side (specifically, to the roof panel 15), and conduct it to the side through the rear roof cross member, optimizing the annular force transmission path at the rear part of the vehicle body, enhancing the dispersion and transmission effect of the force transmission path on the acting force, and can disperse and transmit the forces at the rear shock absorber point, the strut installation point and the side collision and rear collision to the whole vehicle body through multiple composite overlapping cavity structures, effectively improving the performance of the whole vehicle. Among them, the rear roof cross member is located at the rear side of the roof and is connected to the rear side of the roof panel 15 and the tops of the vehicle body column assemblies on both sides.

[0070] In some embodiments, referring to Figure 8The support rod connection position 401 can be implemented in ways including but not limited to support rod mounting holes. Multiple support rod mounting holes are provided to ensure the installation strength of the tailgate support rod. In specific implementation, in order to facilitate connection with the tailgate support rod, the assembly direction of the support rod mounting position is generally rearward. It can be completely parallel to the front-rear direction or set at a certain angle to the front-rear direction, as long as it meets the assembly requirements of the tailgate support rod.

[0071] In some embodiments, see Figure 5 The upper section 9 of the rear drainage channel is fitted and connected to the rear of the D-pillar reinforcement plate unit 3. Its main function is to collect rainwater from the roof drainage channel and guide the rainwater downward to prevent water accumulation. Therefore, the upper section 9 of the rear drainage channel has a guide channel for water diversion. On this basis, the rear edge of the side panel 7 is fitted and connected to the front and rear edges or the outer edge of the upper section 9 of the rear drainage channel to avoid obstructing the guide channel.

[0072] In some embodiments, the aforementioned D-pillar inner panel unit 2 can be adopted as follows: Figure 8 The structure shown. See also Figure 8 The D-pillar inner panel unit 2 includes a D-pillar inner panel 210 and a roof rear crossbeam connecting plate 220 connected sequentially from bottom to top. The front sides of both the D-pillar inner panel 210 and the roof rear crossbeam connecting plate 220 are connected to the rear side of the C-pillar unit 1. The support reinforcement plate 4 has a box-shaped structure with one side opening, which is located on the outer side of the top of the D-pillar inner panel 210. The edge of the support reinforcement plate 4 on the open side is bent to form a support reinforcement flange 410, which is fitted and connected to the D-pillar inner panel 210 and also to the roof rear crossbeam connecting plate 220. The roof rear crossbeam connecting plate 220 is connected to the end of the roof rear crossbeam.

[0073] In this embodiment, the support reinforcement plate 4 has a box-shaped structure with high structural strength, providing reliable support and reinforcement. It is located on the outer side of the top of the D-pillar inner panel 210, in an area that is the weakest point of the D-pillar reinforcement plate unit 3. The support reinforcement plate 4 in this location provides precise support and facilitates assembly with the tailgate strut. Furthermore, this embodiment divides the D-pillar inner panel unit 2 into the D-pillar inner panel 210 and the roof rear crossbeam connecting plate 220. Both can be molded separately for different assembly requirements before welding, simplifying the manufacturing process. The support reinforcement flange 410 is simultaneously attached to both the D-pillar inner panel 210 and the roof rear crossbeam connecting plate 220, further enhancing the overall integrity of the assembled D-pillar inner panel 210 and roof rear crossbeam connecting plate 220. Simultaneously, it facilitates the rapid transfer of force from the tailgate strut to the other side of the vehicle body via the roof rear crossbeam connecting plate 220.

[0074] In some embodiments, see Figure 5 , Figure 6 , Figure 8 , Figure 11 and Figure 12 The vehicle body pillar structure assembly also includes a wheel arch plate 10; the top of the D-pillar inner panel unit 2 has a first extension end 201 of the inner panel connected to the rear crossbeam plate 11 of the roof rear crossbeam; the top of the C-pillar unit 1 has a second extension end 101 of the inner panel connected to the rear section 16 of the B-pillar inner panel; the lower end of the D-pillar inner panel unit 2 is also connected to the wheel arch plate 10; the top of the D-pillar reinforcing plate unit 3 has a first extension end 301 of the reinforcing plate connected to the first extension end 201 of the inner panel, and a second extension end 302 of the reinforcing plate connected to the second extension end 101 of the inner panel; the lower end of the D-pillar reinforcing plate unit 3 is also connected to the wheel arch plate 10; the first extension end 201 of the inner panel and the first extension end 301 of the reinforcing plate cooperate to form a first end force transmission cavity for transmitting force to the rear crossbeam of the roof; the second extension end 101 of the inner panel and the second extension end 302 of the reinforcing plate cooperate to form a second end force transmission cavity for transmitting force to the rear section 16 of the B-pillar inner panel.

[0075] Among them, the wheel cover 10 covers the area above the wheel and is a key component for protecting the tire, with the core functions of reducing noise transmission and optimizing aerodynamic performance.

[0076] In this embodiment, the D-pillar inner panel unit 2 and the C-pillar unit 1 cooperate with the D-pillar reinforcing plate unit 3 to form a first end force transmission cavity that transmits force to the rear crossbeam of the roof, and a second end force transmission cavity that transmits force to the rear section 16 of the B-pillar inner panel. The vibration energy generated by the shock absorber can be transmitted upward through the wheel arch plate 10 and diverted near the roof 15. Part of the energy passes through the first end force transmission cavity and the rear crossbeam of the roof in sequence and is transmitted to the other side of the vehicle body. The remaining energy passes through the second end force transmission cavity and the rear section 16 of the B-pillar inner panel in sequence and is transmitted to the front side of the vehicle body. It can be seen that this embodiment forms a Y-shaped force diversion channel at the top of the C-pillar and D-pillar, constructing a complete annular force transmission channel in this area. The vibration energy of the shock absorber can be transmitted through this area to the B-pillar, A-pillar, front crossbeam of the roof, rear crossbeam of the roof, etc., effectively dispersing stress.

[0077] In this embodiment, the wheel cover plate 10 includes an inner wheel cover plate 1020 and an outer wheel cover plate 1010 that is attached to the outside of the inner wheel cover plate 1020.

[0078] Based on the above embodiments, see Figure 5 and Figure 6, the D-pillar reinforcement plate unit 3 includes a D-pillar reinforcement plate upper section 310 and a D-pillar reinforcement plate lower section 320 that are sequentially connected from top to bottom. The lower end of the D-pillar reinforcement plate lower section 320 is connected to the wheelhouse plate 10, and the top of the D-pillar reinforcement plate upper section 310 forms a reinforcement plate first extension end 301 and a reinforcement plate second extension end 302. On the rear side of the D-pillar reinforcement plate upper section 310, a first channel facade 311 and a second channel facade 312 are sequentially distributed from top to bottom. The first channel facade 311 and the second channel facade 312 are arranged at an angle, and the second channel facade 312 slopes forward to connect with the D-pillar reinforcement plate lower section 320; the body pillar structure assembly further includes an upper rear water trough 9, and the upper rear water trough 9 is fitted and connected to the first channel facade 311.

[0079] In this embodiment, the D-pillar reinforcement plate unit 3 is divided into a D-pillar reinforcement plate upper section 310 and a D-pillar reinforcement plate lower section 320, and the D-pillar reinforcement plate upper section 310 and the D-pillar reinforcement plate lower section 320 are respectively formed according to different connection requirements, and the structural design of the two is more flexible. On this basis, the first channel facade 311 is provided to achieve the fitting connection with the upper rear water trough 9, and the second channel facade 312 is provided to achieve the connection with the D-pillar reinforcement plate lower section 320, fully meeting the assembly requirements.

[0080] In addition, since the first channel facade 311, the second channel facade 312 and the rear side of the D-pillar reinforcement plate lower section 32 are formed into a Z-shaped facade structure, this design can bring the following beneficial effects: First, it can increase the sectional moment of inertia of the side wall and effectively resist the buckling deformation under axial pressure, especially suitable for thin-walled structures such as the D-pillar reinforcement plate unit 3; Second, the polygonal side wall may form an effect similar to "stiffening ribs" to disperse local stress, avoid single-plane instability, and enhance multi-directional stability; Third, the bending of the Z-shaped facade structure can decompose the load into components in multiple directions, change the force transmission direction through the geometric shape change, and avoid stress concentration. It can be seen that the Z-shaped facade structure on the rear side of the D-pillar reinforcement plate unit 3 significantly promotes the structural stability of the D-pillar reinforcement plate unit 3.

[0081] It should be noted that both the D-pillar reinforcement plate upper section 31 and the D-pillar reinforcement plate lower section 32 are sheet metal parts with a "C" - shaped cross-section. Connecting flanges are respectively provided around the D-pillar reinforcement plate upper section 310 and the D-pillar reinforcement plate lower section 320 to be fitted and connected to the corresponding C-pillar unit 1 or D-pillar inner plate unit 2, and the outwardly arched parts of the D-pillar reinforcement plate upper section 310 and the D-pillar reinforcement plate lower section 320 can cooperate with the C-pillar unit 1 and the D-pillar inner plate unit 2 to form a force transmission channel. The first channel facade 311 and the second channel facade 312 are arranged in the arched area of the D-pillar reinforcement plate upper section 310. Among them, both the first channel facade 311 and the second channel facade 312 are arranged at an angle with the plate surface of the D-pillar inner plate unit 2 to facilitate the assembly with the upper rear water trough 9.

[0082] In some specific embodiments, referring to Figure 6 、 Figure 8 and Figure 9 , a B-pillar connection reinforcement plate 330 is further provided on the first extension end 301 of the reinforcement plate. The B-pillar connection reinforcement plate 330 is arched and straddles the upper and lower sides of the second extension end 101 of the inner panel. As an extension of the upper section 310 of the D-pillar reinforcement plate, the B-pillar connection reinforcement plate 330 can expand the force transmission joint area between the upper section 310 of the D-pillar reinforcement plate and the rear section 16 of the B-pillar inner panel when transmitting force and搭接 with the rear section 16 of the B-pillar inner panel. Moreover, it can also support the force transmission of the rear section 16 of the B-pillar inner panel and enhance the structural strength of the connection area.

[0083] In some embodiments, referring to Figure 8 and Figure 9 , a rear crossmember connection reinforcement plate 12 is connected to the first extension end 201 of the inner panel. The rear crossmember connection reinforcement plate 12 is used to connect to the roof rear crossmember plate 11 in the roof rear crossmember. Among them, the roof rear crossmember plate 11 belongs to a part of the roof rear crossmember, and it directly abuts against the first extension end 201 of the inner panel. By providing the rear crossmember connection reinforcement plate 12, support is formed in the joint area between the two to prevent the roof rear crossmember plate 11 from collapsing and at the same time enhance the structural strength of this area.

[0084] Optionally, the rear crossmember connection reinforcement plate 12 is a box-shaped member, and its edge forms a connecting flange, making the cross-section of the rear crossmember connection reinforcement plate 12 in a "U" shape. Combined with the box-shaped design, the rear crossmember connection reinforcement plate 12 has relatively high structural strength, can also enhance the bonding strength with the first extension end 201 of the inner panel, form support at the end of the roof rear crossmember plate 11, and enhance the structural strength of this area.

[0085] In some embodiments, referring to Figure 5 、 Figure 6 、 Figure 8 and Figure 9 , the C-pillar unit 1 includes a C-pillar inner panel 110 and a C-pillar reinforcement plate 120 connected in sequence from top to bottom. The D-pillar inner panel unit 2 and the D-pillar reinforcement plate unit 3 are respectively connected to the C-pillar inner panel 110; the body pillar structure assembly further includes a wheelhouse panel 10. The C-pillar reinforcement plate 120 is adhesively connected to the outer side of the front part of the wheelhouse panel 10, and the two enclose a C-pillar force transmission cavity 13. In this embodiment, the front side of the wheelhouse panel 10 is connected to the sill beam. When the sill beam is subjected to a side impact, the acting force can be transmitted upward through the force transmission channel formed by the C-pillar force transmission cavity 13 to the upper C-pillar inner panel 110, and then further transmitted to structures such as the roof rear crossmember and the B-pillar through the C-pillar inner panel 110. The acting force can be effectively transmitted and dispersed, enhancing the side impact bearing capacity.

[0086] Optionally, the rear side of the top of the C-column reinforcement plate 120 is adhesively connected to the outer side of the bottom of the C-column inner plate 110. The lower part of the C-column reinforcement plate 120 is adapted to the edge shape of the wheelhouse plate 10. The cross-section of the C-column reinforcement plate 120 is in a "ji" shape, and the arched area forms the C-column force transmission cavity 13. The connecting flanges at the edges are used for adhesively connecting to the C-column inner plate 110 and the wheelhouse plate 10.

[0087] Based on the above embodiments, refer to Figures 1 to 4 , a fourth cavity 14 is formed between the C-column reinforcement plate 120 and the outer side panel 7. The fourth cavity 14 is connected to the third cavity 8. The C-column reinforcement plate 120 divides the fourth cavity 14. The C-column force transmission cavity 13 and the fourth cavity 14 form a cavity distribution pattern similar to a "day" character, which can significantly increase the section moment of inertia, thereby enhancing the bending stiffness. Moreover, the multi-cavity design can play a role in dispersing loads, further improving the impact resistance and torsional resistance. In addition, since the fourth cavity 14 is connected to the third cavity 8, the outer side panel 7 forms an integral cavity structure on the outer sides of the C-column and the D-column. The D-column reinforcement plate unit 3, the support reinforcement plate 4, and the C-column reinforcement plate 120 are multi-layer separated within this cavity structure, forming the C-column and D-column structures of a multi-layer composite wall, which helps to further improve the torsional stiffness of the rear part of the vehicle body and the strength of key mounting points (including the shock absorber mounting point and the back door strut mounting point), thereby improving the driving stability and durability of the vehicle.

[0088] It should be noted that, according to Figures 2 to 4 the shown perspective, the third cavity 8 and the fourth cavity 14 are distributed in the front-rear direction.

[0089] In the present application, the wheelhouse plate 10, the outer side panel 7, and the upper section of the rear water trough 9 cooperate with the C-column unit 1, the D-column inner plate unit 2, the D-column reinforcement plate unit 3, and the support reinforcement plate 4 to form the C-column and D-column structures strengthened by multi-layer composite cavities, and improve the force transmission structure design of the rear shock absorber mounting point and the back door strut mounting point, enhancing the torsional stiffness of the whole vehicle and the strength of key mounting points, thereby improving the driving stability and durability of the vehicle and ultimately enhancing the quality of the whole vehicle.

[0090] Based on the same inventive concept, the embodiment of the present application further provides a vehicle, including the above-mentioned body pillar structure assembly.

[0091] Compared with the prior art, the vehicle provided by the present application effectively improves the torsional stiffness of the rear part of the vehicle body by adopting the above-mentioned body pillar structure assembly, and ultimately improves the torsional stiffness of the whole vehicle, which has an improvement effect on aspects such as improving steering response and accuracy, reducing abnormal noises in the rear part of the vehicle body, effectively improving the phenomenon of unstable chassis during vehicle driving, and enhancing the driving experience and safety.

[0092] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vehicle body pillar structure assembly, characterized by, include: C-pillar unit (1), D-pillar inner panel unit (2), D-pillar reinforcing plate unit (3) and supporting reinforcing plate (4); The C-pillar unit (1) is connected to the front side of the D-pillar inner panel unit (2), and the D-pillar reinforcing plate unit (3) is connected to the outside of the C-pillar unit (1) and the D-pillar inner panel unit (2). The C-pillar unit (1), the D-pillar inner panel unit (2) and the D-pillar reinforcing plate unit (3) together form the D-pillar inner cavity. The supporting reinforcement plate (4) is disposed in the inner cavity of the D-pillar and is supported and connected between the inner plate unit (2) of the D-pillar and the reinforcing plate unit (3) of the D-pillar. The supporting reinforcement plate (4) divides the inner cavity of the D-pillar into a first cavity (5) and a second cavity (6).

2. The vehicle body pillar structure assembly of claim 1, wherein, The vehicle body pillar structure assembly also includes a side outer panel (7), which is located outside the C-pillar unit (1), the D-pillar inner panel unit (2) and the D-pillar reinforcing plate unit (3), and forms a third cavity (8) between the D-pillar reinforcing plate unit (3) and the side outer panel (7).

3. The vehicle body pillar structure assembly of claim 1, wherein, The rear of the support reinforcement plate (4) has a strut connection position (401), and the tailgate strut can be connected to the strut connection position (401). The body pillar structure assembly also includes a rear water channel upper section (9), which is located on the rear side of the D-pillar reinforcement plate unit (3). The rear water channel upper section (9), the D-pillar reinforcement plate unit (3), and the support reinforcement plate (4) are stacked and connected. The first cavity (5) and the second cavity (6) are distributed in the front-back direction to provide support for the strut in the front-back direction.

4. The vehicle body pillar structure assembly of claim 3, wherein, The D-pillar inner panel unit (2) includes a D-pillar inner panel (210) and a roof rear crossbeam connecting plate (220) connected sequentially from bottom to top. The front side of the D-pillar inner panel (210) and the front side of the roof rear crossbeam connecting plate (220) are both connected to the rear side of the C-pillar unit (1). The supporting reinforcement plate (4) has a box-shaped structure with an opening on one side, and is located on the outer side of the top of the inner panel (210) of the D-pillar. The edge of the opening side of the supporting reinforcement plate (4) is bent to form a supporting reinforcement flange (410). The supporting reinforcement flange (410) is attached to the inner panel (210) of the D-pillar and is also attached to the rear crossbeam connecting plate (220) of the top cover.

5. The vehicle body pillar structural assembly of claim 1, wherein, The vehicle body pillar structure assembly also includes wheel arch panels (10); The top of the D-pillar inner panel unit (2) has a first extension end (201) of the inner panel connected to the rear crossbeam of the roof, the top of the C-pillar unit (1) has a second extension end (101) of the inner panel connected to the rear section (16) of the B-pillar inner panel, and the lower end of the D-pillar inner panel unit (2) is also connected to the wheel cover plate (10). The top of the D-pillar reinforcing plate unit (3) is formed with a first extension end (301) of the reinforcing plate connected to the first extension end (201) of the inner plate, and a second extension end (302) of the reinforcing plate connected to the second extension end (101) of the inner plate. The lower end of the D-pillar reinforcing plate unit (3) is also connected to the wheel cover plate (10). The first extension end (201) of the inner panel and the first extension end (301) of the reinforcing plate cooperate to form a first end force transmission cavity for transmitting force to the rear crossbeam of the top cover, and the second extension end (101) of the inner panel and the second extension end (302) of the reinforcing plate cooperate to form a second end force transmission cavity for transmitting force to the rear section (16) of the inner panel of the B-pillar.

6. The vehicle body pillar structural assembly of claim 5, wherein, The D-pillar reinforcing plate unit (3) includes an upper section (310) and a lower section (320) of the D-pillar reinforcing plate connected sequentially from top to bottom. The lower end of the lower section (320) of the D-pillar reinforcing plate is connected to the wheel cover plate (10). The top of the upper section (310) of the D-pillar reinforcing plate forms the first extension end (301) and the second extension end (302) of the reinforcing plate. The rear side of the upper section (310) of the D-pillar reinforcement plate forms a first channel facade (311) and a second channel facade (312) distributed sequentially from top to bottom. The first channel facade (311) and the second channel facade (312) are set at an angle. The second channel facade (312) is inclined forward to connect with the lower section (320) of the D-pillar reinforcement plate. The body pillar structure assembly also includes an upper section (9) of the rear water channel, which is fitted and connected to the first channel facade (311).

7. The vehicle body pillar structural assembly of claim 5, wherein, A rear crossbeam connecting reinforcement plate (12) is connected to the first extension end (201) of the inner plate, and the rear crossbeam connecting reinforcement plate (12) is used to connect with the rear crossbeam of the top cover.

8. The vehicle body pillar structure assembly as described in claim 2, characterized in that, The C-pillar unit (1) includes a C-pillar inner panel (110) and a C-pillar reinforcing plate (120) connected sequentially from top to bottom. The D-pillar inner panel unit (2) and the D-pillar reinforcing plate unit (3) are respectively connected to the C-pillar inner panel (110). The vehicle body pillar structure assembly also includes a wheel cover plate (10), and the C-pillar reinforcing plate (120) is attached to the outer side of the front part of the wheel cover plate (10), and the two together form a C-pillar force transmission cavity (13).

9. The vehicle body pillar structural assembly of claim 8, wherein, A fourth cavity (14) is formed between the C-pillar reinforcing plate (120) and the side outer plate (7), and the fourth cavity (14) is connected to the third cavity (8).

10. A vehicle characterized by comprising: Includes the vehicle body pillar structure assembly as described in any one of claims 1-9.

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