B-pillar joint structure without c-pillar and vehicle

Abstract

The application discloses a C-pillar-free rear side wall D-pillar joint structure and a vehicle, and relates to the technical field of automobile body frames, wherein the C-pillar-free rear side wall D-pillar joint structure comprises a roof side rail assembly, a roof rear cross beam assembly, a D-pillar assembly, a reinforcing structure cavity formed through the upper part of a rear wheel cover, and a D-pillar joint piece; the D-pillar joint piece is located at the intersection of the roof side rail assembly, the roof rear cross beam assembly and the D-pillar assembly, and connects the roof side rail assembly, the roof rear cross beam assembly, the D-pillar assembly and the reinforcing structure cavity into an integral whole in a four-way mode. The application can ensure the structural strength and torsional stiffness of the rear side wall region under the condition of no C-pillar.

Description

Technical Field

[0001] This invention relates to the field of automobile body frame technology, specifically to a C-pillar-free rear side panel D-pillar joint structure and vehicle. Background Technology

[0002] The A-pillar, B-pillar, and C-pillar of a car are important components of the passenger compartment in a monocoque vehicle body. They are also the main load-bearing components of the car. These pillars support the entire vehicle body and are important steel beam components that support and stabilize the vehicle body structure.

[0003] For SUVs (Sport Utility Vehicles) or MPVs (Multi-Purpose Vehicles), a D-pillar is also present. However, in body structures that typically have a C-pillar, the D-pillar joint contributes less to the structural strength and torsional stiffness of the rear side panel due to the presence of the C-pillar.

[0004] For example, in publicly available solutions in the existing technology, a split-type assembly welding method is usually adopted to weld together the main structural components such as the rear side inner panel, the rear side upper corner connecting plate, the D-pillar inner panel, the D-pillar lower corner plate, the rear wheel cover outer panel, the rear wheel cover inner panel, the C-pillar upper reinforcing plate, and the rear wheel cover upper support plate, thereby providing support for the rigidity and strength of the vehicle body.

[0005] To save costs and reduce overall weight, the C-pillar could be removed, with the D-pillar providing structural strength and torsional stiffness for the rear side panel area. However, in this approach, removing the C-pillar would fail to effectively support the body-in-white assembly to meet stiffness and strength requirements, making it difficult to reduce vehicle cost and weight while ensuring structural strength and torsional stiffness in the rear side panel area. Summary of the Invention

[0006] To address the deficiencies in the existing technology, the first aspect of the present invention provides a rear side panel D-pillar joint structure without a C-pillar, which can simultaneously ensure the structural strength and torsional stiffness of the rear side panel area without a C-pillar.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A C-pillar-less rear side panel D-pillar joint structure includes a roof side beam assembly, a roof rear crossbeam assembly, and a D-pillar assembly, and further includes:

[0009] The reinforced structural cavity formed above the rear wheel arch; and

[0010] The D-pillar connector is located at the intersection of the roof side beam assembly, the roof rear crossbeam assembly, and the D-pillar assembly, and connects the roof side beam assembly, the roof rear crossbeam assembly, the D-pillar assembly, and the reinforcing structural cavity into a whole through a four-way connector.

[0011] In some embodiments, the reinforcing structure cavity includes the lower section of the rear strut inner plate and the reinforcing plate of the rear wheel arch inner plate.

[0012] In some embodiments, the top cover side beam assembly includes a top cover side beam outer plate and a top cover side beam inner plate;

[0013] The rear crossbeam assembly of the roof includes an outer plate of the rear crossbeam and an inner plate of the rear crossbeam.

[0014] The D-pillar assembly includes an outer D-pillar reinforcing plate and a middle section of an inner D-pillar plate.

[0015] The D-pillar connector includes an outer D-pillar reinforcing plate and an inner D-pillar reinforcing plate;

[0016] The outer reinforcing plate of the D column is connected to the outer plate of the top cover side beam, the outer plate of the top cover rear cross beam, the outer plate of the D column reinforcing plate, and the lower section of the inner plate of the rear support column.

[0017] The inner reinforcing plate of the D-pillar is connected to the inner plate of the roof side beam, the inner plate of the roof rear cross beam, the middle section of the inner plate of the D-pillar, and the reinforcing plate of the inner plate of the rear wheel arch.

[0018] In some embodiments, the outer reinforcing plate of the D-column is connected to the outer plate of the roof side beam, the outer plate of the roof rear cross beam, the outer plate of the D-column reinforcing plate, and the lower section of the inner plate of the rear support column by spot welding and structural adhesive to form the outer plate skeleton structure of the rear side D-column area.

[0019] The inner reinforcing plate of the D-pillar is connected to the inner plate of the side beam of the top cover, the inner plate of the rear cross beam of the top cover, the middle section of the inner plate of the D-pillar and the inner plate of the rear wheel arch through spot welding and structural adhesive to form a plate skeleton structure in the D-pillar area.

[0020] The outer frame structure of the rear side D-pillar area and the inner frame structure of the D-pillar area are connected by spot welding and structural adhesive.

[0021] In some embodiments, the D-pillar connector is connected to the roof side beam assembly along the X-direction of the vehicle;

[0022] The D-pillar connector is connected to the rear crossbeam assembly of the roof along the Y-direction of the vehicle.

[0023] The D-pillar connector is connected to the reinforced structural cavity along the Z-direction of the vehicle;

[0024] The D-pillar connector is inclinedly connected to the D-pillar assembly along the XOZ plane.

[0025] In some embodiments, the angle between the D-pillar assembly and the Z-direction of the vehicle is 60 to 65°.

[0026] In some embodiments, the angle between the D-pillar assembly and the Z-direction of the vehicle is 63°.

[0027] In some embodiments, the thickness of the outer reinforcing plate of the D-pillar is 1.5mm-2mm.

[0028] In some embodiments, the D-pillar connector is provided with a weld lap for connection to the roof side beam assembly, the roof rear crossbeam assembly, the D-pillar assembly, and the reinforcing structure cavity.

[0029] A second aspect of the present invention provides a vehicle that can simultaneously ensure the structural strength and torsional stiffness of the rear side panel area without the presence of a C-pillar.

[0030] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0031] A vehicle includes a C-pillarless rear side panel D-pillar connector structure, the C-pillarless rear side panel D-pillar connector structure including a roof side beam assembly, a roof rear cross beam assembly, a D-pillar assembly, and a reinforcing structural cavity formed through the upper part of the rear wheel arch; and

[0032] The D-pillar connector is located at the intersection of the roof side beam assembly, the roof rear crossbeam assembly, and the D-pillar assembly, and connects the roof side beam assembly, the roof rear crossbeam assembly, the D-pillar assembly, and the reinforcing structural cavity into a whole through a four-way connector.

[0033] In some embodiments, the reinforcing structure cavity includes the lower section of the rear strut inner plate and the reinforcing plate of the rear wheel arch inner plate.

[0034] In some embodiments, the top cover side beam assembly includes a top cover side beam outer plate and a top cover side beam inner plate;

[0035] The rear crossbeam assembly of the roof includes an outer plate of the rear crossbeam and an inner plate of the rear crossbeam.

[0036] The D-pillar assembly includes an outer D-pillar reinforcing plate and a middle section of an inner D-pillar plate.

[0037] The D-pillar connector includes an outer D-pillar reinforcing plate and an inner D-pillar reinforcing plate;

[0038] The outer reinforcing plate of the D column is connected to the outer plate of the top cover side beam, the outer plate of the top cover rear cross beam, the outer plate of the D column reinforcing plate, and the lower section of the inner plate of the rear support column.

[0039] The inner reinforcing plate of the D-pillar is connected to the inner plate of the roof side beam, the inner plate of the roof rear cross beam, the middle section of the inner plate of the D-pillar, and the reinforcing plate of the inner plate of the rear wheel arch.

[0040] In some embodiments, the outer reinforcing plate of the D-column is connected to the outer plate of the roof side beam, the outer plate of the roof rear cross beam, the outer plate of the D-column reinforcing plate, and the lower section of the inner plate of the rear support column by spot welding and structural adhesive to form the outer plate skeleton structure of the rear side D-column area.

[0041] The inner reinforcing plate of the D-pillar is connected to the inner plate of the side beam of the top cover, the inner plate of the rear cross beam of the top cover, the middle section of the inner plate of the D-pillar and the inner plate of the rear wheel arch through spot welding and structural adhesive to form a plate skeleton structure in the D-pillar area.

[0042] The outer frame structure of the rear side D-pillar area and the inner frame structure of the D-pillar area are connected by spot welding and structural adhesive.

[0043] In some embodiments, the D-pillar connector is connected to the roof side beam assembly along the X-direction of the vehicle;

[0044] The D-pillar connector is connected to the rear crossbeam assembly of the roof along the Y-direction of the vehicle.

[0045] The D-pillar connector is connected to the reinforced structural cavity along the Z-direction of the vehicle;

[0046] The D-pillar connector is inclinedly connected to the D-pillar assembly along the XOZ plane.

[0047] In some embodiments, the angle between the D-pillar assembly and the Z-direction of the vehicle is 60 to 65°.

[0048] In some embodiments, the angle between the D-pillar assembly and the Z-direction of the vehicle is 63°.

[0049] In some embodiments, the thickness of the outer reinforcing plate of the D-pillar is 1.5mm-2mm.

[0050] In some embodiments, the D-pillar connector is provided with a weld lap for connection to the roof side beam assembly, the roof rear crossbeam assembly, the D-pillar assembly, and the reinforcing structure cavity.

[0051] The C-pillarless rear side panel D-pillar joint structure of this invention includes a roof side beam assembly, a roof rear crossbeam assembly, and a D-pillar assembly. It also includes a reinforcing structural cavity formed above the rear wheel arch, and a D-pillar joint component. The D-pillar joint component is located at the intersection of the roof side beam assembly, the roof rear crossbeam assembly, and the D-pillar assembly, and connects the roof side beam assembly, the roof rear crossbeam assembly, the D-pillar assembly, and the reinforcing structural cavity into a single unit via a four-way connection. Thus, for a C-pillarless vehicle body structure, the D-pillar joint component 5 is used as a four-way structural component, forming an independent reinforcement structure on the upper part of the rear wheel arch that, together with the rear D-pillar assembly 3, constitutes a local reinforcement structure, situated between the traditional C-pillar and D-pillar. This allows the "rear wheel arch beam + D-pillar joint component + D-pillar assembly" to replace the traditional "C-pillar + D-pillar" reinforcement structure in the rear side panel area, reconstructing the load transmission path of the entire rear side panel area and effectively improving the torsional stiffness and structural strength of the rear side panel area. Attached Figure Description

[0052] Figure 1 This is an overall structural diagram of the rear side wall D-pillar joint structure without C-pillar in an embodiment of the present invention;

[0053] Figure 2 This is a top view of the exterior of the vehicle with the D-pillar joint structure without C-pillar in an embodiment of the present invention.

[0054] Figure 3 This is a schematic diagram of the structure of the rear side wall without C-pillar and D-pillar joint structure in an embodiment of the present invention, viewed from the inside of the vehicle when looking upwards.

[0055] Figure 4 This is a schematic cross-sectional view of the D-pillar joint structure without C-pillar in an embodiment of the present invention.

[0056] Figure 5 As described in the embodiments of the present invention Figure 4 A cross-sectional view along the AA direction;

[0057] Figure 6 As described in the embodiments of the present invention Figure 4 A cross-sectional view along the BB direction;

[0058] Figure 7 As described in the embodiments of the present invention Figure 4 A cross-sectional view along the CC direction;

[0059] Figure 8 As described in the embodiments of the present invention Figure 4 A cross-sectional view along the DD direction.

[0060] In the diagram: 1. Roof side beam assembly; 11. Outer plate of roof side beam; 12. Inner plate of roof side beam; 2. Rear crossbeam assembly of roof; 21. Outer plate of rear crossbeam of roof; 22. Inner plate of rear crossbeam of roof; 3. D-pillar assembly; 31. Outer plate of D-pillar reinforcement plate; 32. Middle section of inner plate of D-pillar; 4. Reinforced structural cavity; 41. Lower section of inner plate of rear pillar; 42. Reinforced plate of inner plate of rear wheel arch; 5. D-pillar connector; 51. Outer reinforcement plate of D-pillar; 52. Inner reinforcement plate of D-pillar. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] It's worth noting that the C-pillar refers to the pillar connecting the roof to the body on either side of the rear seats, and it directly affects the deformation and damage in a rear-side collision. For SUVs and MPVs, there is also a D-pillar, typically located at the junction of the rear side window and the rear windshield. Generally, both the C-pillar and D-pillar contribute to the structural strength and torsional stiffness of the rear side area, but the C-pillar contributes more significantly. Due to the presence of the C-pillar, the D-pillar contributes less to the structural strength and torsional stiffness of the rear side area. Therefore, if the C-pillar were removed, it would be difficult to guarantee the structural strength and torsional stiffness of the rear side area relying solely on the D-pillar.

[0063] To solve the above technical problems, see [link to relevant documentation]. Figures 1 to 3 As shown, this embodiment of the invention provides a rear side panel D-pillar joint structure without a C-pillar, including a roof side beam assembly 1, a roof rear crossbeam assembly 2, a D-pillar assembly 3, a reinforcing structural cavity 4 formed through the upper part of the rear wheel arch, and a D-pillar joint component 5.

[0064] The D-pillar connector 5 is located at the intersection of the top cover side beam assembly 1, the top cover rear crossbeam assembly 2, and the D-pillar assembly 3, and connects the top cover side beam assembly 1, the top cover rear crossbeam assembly 2, the D-pillar assembly 3, and the reinforcing structure cavity 4 into a whole through a four-way connection.

[0065] In other words, for a body structure without a C-pillar, this embodiment of the invention uses the D-pillar connector 5 as a four-way structural component, and forms an independent structure on the upper part of the rear wheel arch, which together with the rear D-pillar assembly 3 forms a local reinforcement structure, located between the traditional C-pillar and D-pillar. This allows the "rear wheel arch beam + D-pillar connector + D-pillar assembly" to replace the traditional "C-pillar + D-pillar" reinforcement structure in the rear side panel area, reconstructing the load transmission path of the entire rear side panel area and effectively improving the torsional stiffness and structural strength of the rear side panel area.

[0066] In practice, a reinforcing structural cavity 4 composed of the lower section 41 of the rear pillar inner plate and the reinforcing plate 42 of the rear wheel arch inner plate can be added to the area of ​​the inner and outer plates of the rear wheel arch, thereby providing better support for improving the structural strength and torsional stiffness of the rear side panel area.

[0067] Furthermore, it is worth noting that in this embodiment of the invention, the connection orientations of the D-pillar connector 5 with the roof side beam assembly 1, the roof rear crossbeam assembly 2, the D-pillar assembly 3, and the reinforcing structure cavity 4 are respectively:

[0068] The D-pillar connector 5 is connected to the roof side beam assembly 1 along the X-direction of the vehicle; the D-pillar connector 5 is connected to the roof rear crossbeam assembly 2 along the Y-direction of the vehicle; the D-pillar connector 5 is connected to the reinforcing structure cavity 4 along the Z-direction of the vehicle; and the D-pillar connector 5 is obliquely connected to the D-pillar assembly 3 along the XOZ plane. It is worth noting that the X-direction of the vehicle refers to the length direction, the Y-direction refers to the width direction, and the Z-direction refers to the height direction.

[0069] To achieve the goal of connecting the roof side beam assembly 1, the roof rear crossbeam assembly 2, the D-pillar assembly 3, and the reinforcing structure cavity 4 into a single unit using a four-way connection, in some embodiments, the roof side beam assembly 1 includes an outer roof side beam plate 11 and an inner roof side beam plate 12; the roof rear crossbeam assembly 2 includes an outer roof rear crossbeam plate 21 and an inner roof rear crossbeam plate 22; the D-pillar assembly 3 includes an outer D-pillar reinforcing plate 31 and a middle section 32 of the inner D-pillar plate; and the D-pillar connector 5 includes an outer D-pillar reinforcing plate 51 and an inner D-pillar reinforcing plate 52.

[0070] Then, the outer reinforcing plate 51 of the D-pillar is simultaneously connected to the outer plate 11 of the roof side beam, the outer plate 21 of the roof rear cross beam, the outer plate 31 of the D-pillar reinforcing plate, and the lower section 41 of the inner plate of the rear support column. The inner reinforcing plate 52 of the D-pillar is simultaneously connected to the inner plate 12 of the roof side beam, the inner plate 22 of the roof rear cross beam, the middle section 32 of the inner plate of the D-pillar, and the reinforcing plate 42 of the inner plate of the rear wheel arch. At the same time, the reinforcing plate 42 of the inner plate of the rear wheel arch and the lower section 41 of the inner plate of the rear support column are welded in the upper area of ​​the rear wheel arch to form a cavity structure, so that the columns in the four directions centered on the D-pillar joint 5 all form a reasonable cavity structure.

[0071] It is understandable that the cavity formed by welding the rear wheel arch inner plate reinforcement plate 42 and the lower section 41 of the rear pillar inner plate in the upper area of ​​the rear wheel arch, plus the welded assembly of the inner and outer plates of the D pillar with a larger forward tilt angle, can make the overall structural strength of the side wall area equivalent to that of the traditional rear side wall area with C pillar, thus achieving the structural design goal of the rear side wall area without C pillar.

[0072] Preferably, in some embodiments, the outer reinforcing plate 51 of the D-pillar is connected to the outer plate 11 of the roof side beam, the outer plate 21 of the roof rear crossbeam, the outer plate 31 of the D-pillar reinforcing plate, and the lower section 41 of the rear support inner plate by spot welding and structural adhesive to form the outer plate skeleton structure of the rear side D-pillar area. The inner reinforcing plate 52 of the D-pillar is connected to the inner plate 12 of the roof side beam, the inner plate 22 of the roof rear crossbeam, the middle section 32 of the D-pillar inner plate, and the inner reinforcing plate 42 of the rear wheel arch inner plate by spot welding and structural adhesive to form the inner plate skeleton structure of the D-pillar area; the outer plate skeleton structure of the rear side D-pillar area and the inner plate skeleton structure of the D-pillar area are connected by spot welding and structural adhesive.

[0073] For details, see Figure 4 As shown, Figure 4 This is a partial view of the four-way structure of the D-pillar connector 5 and its mating relationship with the surrounding components. Figure 5 In the middle, the outer reinforcing plate 51 of the D column, the inner reinforcing plate 52 of the D column, the outer plate 11 of the top cover side beam, and the inner plate 12 of the top cover side beam are connected by welding and structural adhesive to enhance the local rigidity of the top cover side beam. Figure 6 In the middle, the outer reinforcing plate 51 of the D column is connected to the outer plate 21 of the rear crossbeam of the roof, the inner plate 22 of the rear crossbeam of the roof, and the inner reinforcing plate 52 of the D column by welding and structural adhesive to enhance the rigidity of the rear crossbeam of the roof and improve the torsional rigidity of the rear door opening. Figure 7 In the middle section, the inner reinforcing plate 52 of the D-pillar is connected to the middle section 32 of the inner plate of the D-pillar and the outer plate 31 of the reinforcing plate of the D-pillar by welding and structural adhesive, thereby enhancing the cavity structure of the D-pillar and improving the rigidity of the D-pillar. Figure 8 In the middle, the outer reinforcing plate 51 of the D-pillar is connected to the lower section 41 of the inner plate of the rear pillar, the inner reinforcing plate 42 of the rear wheel arch, and the inner reinforcing plate 52 of the D-pillar by welding and structural adhesive, forming an independent local reinforcing structure on the upper part of the rear wheel arch, which together with the rear D-pillar forms a local reinforcing structure, providing good support for improving the structural strength and torsional stiffness of the rear side area.

[0074] It should be noted that, in addition to spot welding and structural adhesive bonding, other connection methods can be used to connect the above-mentioned components into a whole, and the embodiments of the present invention do not limit this.

[0075] Furthermore, in some embodiments, the angle between the D-pillar assembly 3 and the vehicle's Z-direction is 60-65°. Preferably, the angle between the D-pillar assembly 3 and the vehicle's Z-direction is 63°. Generally, in the prior art, the angle between the D-pillar assembly 3 and the vehicle's Z-direction is around 40-55°. In this invention, the forward tilt angle of the D-pillar assembly is increased. On the one hand, this meets the styling requirements; on the other hand, by innovating the "four-way" structure of the D-pillar joint, the increased forward tilt angle of the D-pillar is effectively combined with the styling feature of the increased D-pillar tilt angle. Using a low-cost and low-weight solution, the body structure is strengthened, effectively improving the structural strength and torsional stiffness of the rear side panel area, thereby improving the overall performance target of the body-in-white.

[0076] In some embodiments, to facilitate better connection between the D-pillar connector 5 and the roof side beam assembly 1, the roof rear crossbeam assembly 2, the D-pillar assembly 3, and the reinforcing structural cavity 4, the D-pillar connector 5 is provided with weld lap allowances for connection with the roof side beam assembly 1, the roof rear crossbeam assembly 2, the D-pillar assembly 3, and the reinforcing structural cavity 4. That is, the D-pillar connector 5 has weld lap allowances in all four directions corresponding to the four-way connector.

[0077] Furthermore, in some embodiments, the thickness of the outer reinforcing plate 51 of the D-pillar is 1.5mm-2mm. It is worth noting that the thickness of the outer reinforcing plate 51 of the D-pillar can be reasonably set as needed, and this embodiment of the invention does not impose any limitations on it.

[0078] In summary, the D-pillar joint structure without a C-pillar in this invention includes a roof side beam assembly 1, a roof rear crossbeam assembly 2, and a D-pillar assembly 3. It also includes a reinforcing structural cavity 4 formed above the rear wheel arch and a D-pillar joint 5. The D-pillar joint 5 is located at the intersection of the roof side beam assembly 1, the roof rear crossbeam assembly 2, and the D-pillar assembly 3, and connects the roof side beam assembly 1, the roof rear crossbeam assembly 2, the D-pillar assembly 3, and the reinforcing structural cavity 4 into a whole through a four-way connector. Therefore, for the body structure without a C-pillar, the D-pillar connector 5 is used as a four-way structural component, forming an independent structure on the upper part of the rear wheel arch, which together with the rear D-pillar assembly 3 forms a local reinforcement structure, located between the traditional C-pillar and D-pillar. This allows the "rear wheel arch beam + D-pillar connector + D-pillar assembly" to replace the traditional "C-pillar + D-pillar" reinforcement structure in the rear side panel area, reconstructing the load transmission path of the entire rear side panel area and effectively improving the torsional stiffness and structural strength of the rear side panel area.

[0079] Meanwhile, embodiments of the present invention also provide a vehicle that includes a D-pillar joint structure for the rear side panel without a C-pillar.

[0080] One type of structure with a C-pillar-less rear side panel and a D-pillar joint includes a roof side beam assembly 1, a roof rear crossbeam assembly 2, and a D-pillar assembly 3, and further includes:

[0081] The reinforced structural cavity 4 formed on the upper part of the rear wheel arch; and

[0082] The D-pillar connector 5 is located at the intersection of the top cover side beam assembly 1, the top cover rear crossbeam assembly 2 and the D-pillar assembly 3, and connects the top cover side beam assembly 1, the top cover rear crossbeam assembly 2, the D-pillar assembly 3 and the reinforcing structure cavity 4 into a whole through a four-way connection.

[0083] In some embodiments, the reinforcing cavity 4 includes a lower section 41 of the rear strut inner plate and a reinforcing plate 42 of the rear wheel arch inner plate.

[0084] In some embodiments, the top cover side beam assembly 1 includes a top cover side beam outer plate 11 and a top cover side beam inner plate 12;

[0085] The rear crossbeam assembly 2 of the top cover includes an outer plate 21 of the rear crossbeam of the top cover and an inner plate 22 of the rear crossbeam of the top cover.

[0086] The D-pillar assembly 3 includes an outer D-pillar reinforcing plate 31 and a middle section of an inner D-pillar plate 32;

[0087] The D-pillar connector 5 includes an outer D-pillar reinforcing plate 51 and an inner D-pillar reinforcing plate 52;

[0088] The outer reinforcing plate 51 of the D column is connected to the outer plate 11 of the top cover side beam, the outer plate 21 of the rear cross beam of the top cover, the outer plate 31 of the D column reinforcing plate, and the lower section 41 of the inner plate of the rear support column.

[0089] The inner reinforcing plate 52 of the D-pillar is connected to the inner plate 12 of the roof side beam, the inner plate 22 of the roof rear cross beam, the middle section 32 of the inner plate of the D-pillar, and the reinforcing plate 42 of the inner plate of the rear wheel arch.

[0090] In some embodiments, the outer reinforcing plate 51 of the D-column is connected to the outer plate 11 of the roof side beam, the outer plate 21 of the roof rear cross beam, the outer plate 31 of the D-column reinforcing plate, and the lower section 41 of the inner plate of the rear support column by spot welding and structural adhesive to form the outer plate skeleton structure of the rear side D-column area.

[0091] The inner reinforcing plate 52 of the D-pillar is connected to the inner plate 12 of the side beam of the top cover, the inner plate 22 of the rear cross beam of the top cover, the middle section 32 of the inner plate of the D-pillar and the reinforcing plate 42 of the inner plate of the rear wheel cover by spot welding and structural adhesive to form a plate skeleton structure in the D-pillar area.

[0092] The outer frame structure of the rear side D-pillar area and the inner frame structure of the D-pillar area are connected by spot welding and structural adhesive.

[0093] In some embodiments, the D-pillar connector 5 is connected to the roof side beam assembly 1 along the X direction of the vehicle;

[0094] The D-pillar connector 5 is connected to the rear crossbeam assembly 2 of the roof along the Y direction of the vehicle;

[0095] The D-pillar connector 5 is connected to the reinforcing structure cavity 4 along the Z-direction of the vehicle;

[0096] The D-pillar connector 5 is obliquely connected to the D-pillar assembly 3 along the XOZ plane.

[0097] In some embodiments, the angle between the D-pillar assembly 3 and the Z-direction of the vehicle is 60-65°.

[0098] In some embodiments, the angle between the D-pillar assembly 3 and the Z-direction of the vehicle is 63°.

[0099] In some embodiments, the thickness of the outer reinforcing plate 51 of the D-pillar is 1.5mm-2mm.

[0100] In some embodiments, the D-pillar connector 5 is provided with a welded lap for connection with the top cover side beam assembly 1, the top cover rear crossbeam assembly 2, the D-pillar assembly 3 and the reinforcing structure cavity 4.

[0101] In summary, the vehicle of the present invention includes a C-pillarless rear side panel D-pillar joint structure. The C-pillarless rear side panel D-pillar joint structure includes a roof side beam assembly 1, a roof rear crossbeam assembly 2, and a D-pillar assembly 3. It also includes a reinforcing structural cavity 4 formed above the rear wheel arch, and a D-pillar joint member 5. The D-pillar joint member 5 is located at the intersection of the roof side beam assembly 1, the roof rear crossbeam assembly 2, and the D-pillar assembly 3, and connects the roof side beam assembly 1, the roof rear crossbeam assembly 2, the D-pillar assembly 3, and the reinforcing structural cavity 4 into a whole through a four-way connection. Therefore, for the body structure without a C-pillar, the D-pillar connector 5 is used as a four-way structural component, forming an independent structure on the upper part of the rear wheel arch, which together with the rear D-pillar assembly 3 forms a local reinforcement structure, located between the traditional C-pillar and D-pillar. This allows the "rear wheel arch beam + D-pillar connector + D-pillar assembly" to replace the traditional "C-pillar + D-pillar" reinforcement structure in the rear side panel area, reconstructing the load transmission path of the entire rear side panel area and effectively improving the torsional stiffness and structural strength of the rear side panel area.

[0102] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0103] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0104] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A C-pillar-less rear side frame D-pillar joint structure comprising a roof side rail assembly (1), a roof rear cross beam assembly (2) and a D-pillar assembly (3), characterized in that, Also comprising: a reinforcing structure cavity (4) formed through the upper rear wheel cover; and a D-pillar joint member (5) located at the intersection of the roof side rail assembly (1), the roof rear cross beam assembly (2) and the D-pillar assembly (3), and connecting the roof side rail assembly (1), the roof rear cross beam assembly (2), the D-pillar assembly (3) and the reinforcing structure cavity (4) into a whole through a four-way mode; the reinforcing structure cavity (4) comprises a rear pillar inner panel lower section (41) and a rear wheel cover inner panel reinforcing plate (42); the D-pillar joint member (5) is connected with the roof side rail assembly (1) along the X direction of the vehicle; the D-pillar joint member (5) is connected with the roof rear cross beam assembly (2) along the Y direction of the vehicle; the D-pillar joint member (5) is connected with the reinforcing structure cavity (4) along the Z direction of the vehicle; the D-pillar joint member (5) is connected with the D-pillar assembly (3) along the XOZ plane; the roof side rail assembly (1) comprises a roof side rail outer panel (11) and a roof side rail inner panel (12); the roof rear cross beam assembly (2) comprises a roof rear cross beam outer panel (21) and a roof rear cross beam inner panel (22); the D-pillar assembly (3) comprises a D-pillar reinforcing plate outer panel (31) and a D-pillar inner panel middle section (32); the D-pillar joint member (5) comprises a D-pillar outer reinforcing plate (51) and a D-pillar inner reinforcing plate (52); the D-pillar outer reinforcing plate (51) is connected with the roof side rail outer panel (11), the roof rear cross beam outer panel (21), the D-pillar reinforcing plate outer panel (31) and the rear pillar inner panel lower section (41); the D-pillar inner reinforcing plate (52) is connected with the roof side rail inner panel (12), the roof rear cross beam inner panel (22), the D-pillar inner panel middle section (32) and the rear wheel cover inner panel reinforcing plate (42).

2. The C-pillar-free rear side wall D-pillar joint structure according to claim 1, wherein: the D-pillar outer reinforcing plate (51) and the roof side rail outer panel (11), the roof rear cross beam outer panel (21), the D-pillar reinforcing plate outer panel (31) and the rear pillar inner panel lower section (41) are connected to form a rear side wall D-pillar area outer panel framework structure through spot welding and structural adhesive connection; the D-pillar inner reinforcing plate (52) and the roof side rail inner panel (12), the roof rear cross beam inner panel (22), the D-pillar inner panel middle section (32) and the rear wheel cover inner panel reinforcing plate (42) are connected to form a D-pillar area inner panel framework structure through spot welding and structural adhesive connection; the rear side wall D-pillar area outer panel framework structure and the D-pillar area inner panel framework structure are connected through spot welding and structural adhesive connection.

3. The no-pillar rear side member D-pillar joint structure according to claim 1, characterized by: The angle between the D-pillar assembly (3) and the Z direction of the vehicle is 60-65°.

4. The no-pillar rear side member D-pillar joint structure according to claim 3, characterized by: The angle between the D-pillar assembly (3) and the Z direction of the vehicle is 63°.

5. The no-pilar rear side structure D-pillar joint structure according to claim 2, characterized by: The thickness of the D-pillar outer reinforcing plate (51) is 1.5-2 mm.

6. The no-pilar rear side structure of claim 1, wherein: The D-pillar joint member (5) is provided with a welding lap for connecting the roof side rail assembly (1), the roof rear cross beam assembly (2), the D-pillar assembly (3) and the reinforcing structure cavity (4).

7. A vehicle characterized by: The C-pillar-free rear side wall D-pillar joint structure according to any one of claims 1-6.

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