Upper vehicle body structure for improving compressive strength of top of cross-country sport utility vehicle (SUV)

Abstract

The invention discloses an upper vehicle body structure for improving the compressive strength of the top of a cross-country SUV. The upper vehicle body structure comprises an upper vehicle body frame defined by a top cover beam, a column A, a column B, a column C and a doorsill beam. The top cover beam comprises a top cover edge beam, a top cover front cross beam and a top cover rear cross beam, and a skylight reinforcing ring is arranged on the inner side of the top cover beam; the A column comprises an A column reinforcing plate assembly and an A column inner plate assembly; the column B comprises a column B reinforcing plate assembly and a column B inner plate assembly; the C column comprises a C column reinforcing plate assembly and a C column inner plate assembly; the doorsill beam comprises a doorsill reinforcing plate assembly and a doorsill inner plate assembly. The upper vehicle body frame structure has the advantages that a multi-layer, three-dimensional and continuous-path high-strength upper vehicle body frame structure is constructed, a plurality of continuous closed-loop force transmission paths are formed, the structural integrity and deformation resistance are improved, the bearing capacity of the cross-country SUV vehicle when the cross-country SUV vehicle rolls over or the top of the cross-country SUV vehicle is pressed is remarkably improved, the living space in a cabin of a driver and passengers is ensured, and the service life of the cross-country SUV vehicle is prolonged. The strict requirements of top compressive strength regulations are effectively met.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, and in particular to an upper body structure for improving the compressive strength of the roof of an off-road SUV. Background Technology

[0002] With the advancement of the automotive industry, major automakers and consumers are placing increasing emphasis on vehicle safety, constantly demanding higher safety levels to protect the lives and property of occupants. The roof crush resistance is a crucial aspect of vehicle safety. The standard GB26134, "Roof Crushing Strength of Passenger Cars," has raised the roof crush resistance of passenger cars to three times the curb weight or 45 kN, ensuring minimal roof deformation during rollovers or when crushed by other vehicles, thus providing a safe survival space for occupants.

[0003] Currently, with the increasing trend of consumers opting for self-driving tours, off-road SUVs that can simultaneously meet the needs of urban commuting and off-road driving are becoming increasingly popular among family consumers. Off-road SUVs encounter more complex, diverse, and challenging road conditions when driving in the wild, leading to a higher incidence of rollover or overturning accidents. In such situations, the structure of the upper body, especially the A-pillar before the B-pillar, the B-pillar, and the frame structure of the side panels and roof, plays a decisive role in the roof's compressive strength. If the roof's compressive strength is insufficient, serious injuries or fatalities to occupants can easily occur. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an upper body structure that enhances the compressive strength of the roof of an off-road SUV.

[0005] To achieve the above objectives, the present invention can adopt the following technical solutions: The upper body structure for improving the compressive strength of the top of an off-road SUV, as described in this invention, includes an upper body frame formed by a roof beam, A-pillar, B-pillar, C-pillar, and sill beam. The top cover beam includes a pair of parallel top cover side beams, and a rectangular frame formed by the top cover front crossbeam and the top cover rear crossbeam spanning between the two top cover side beams. A skylight reinforcing ring is provided on the inner side of the top cover beam. The front end of the skylight reinforcing ring is fixedly connected to the top cover front crossbeam, and its left and right sides are overlapped and fixedly connected to the top cover side beams. The A-pillar includes an A-pillar reinforcing plate assembly and an A-pillar inner plate assembly. The A-pillar reinforcing plate assembly consists of an upper A-pillar reinforcing plate and a lower A-pillar reinforcing plate. The upper A-pillar reinforcing plate and the lower A-pillar reinforcing plate are connected by an overlap at their joint. The upper end of the upper A-pillar reinforcing plate is connected by an overlap to the top cover side beam and extends rearward along the top cover side beam to the rear of the B-pillar. The B pillar includes a B pillar reinforcement plate assembly and a B pillar inner panel assembly. Among them, the upper end of the B pillar reinforcement plate assembly is lap-connected and fixed to the extension section of the upper A pillar reinforcement plate. The B pillar inner panel assembly is composed of an upper B pillar inner panel and a lower B pillar inner panel. The upper end of the upper B pillar inner panel is fixedly connected to the skylight reinforcement ring through a B pillar connecting member. The lower end of the lower B pillar inner panel extends to the lower stop of the sill beam and is lap-connected and fixed thereto. The C pillar includes a C pillar reinforcement plate assembly and a C pillar inner panel assembly. Among them, the upper end of the C pillar reinforcement plate assembly is lap-connected and fixed to the extension end of the upper A pillar reinforcement plate, and its lower end is lap-connected and fixed to the rear wheel hub frame of the vehicle. The upper end of the C pillar inner panel assembly is fixedly connected to the rear roof crossmember through a crossbeam connecting plate. The sill beam includes a sill reinforcement plate assembly and a sill inner panel assembly. Among them, the front end of the sill reinforcement plate assembly is lap-connected and fixed to the lower end of the lower A pillar reinforcement plate, and its rear end is lap-connected and fixed to the rear wheel hub frame of the vehicle. The middle part of the sill reinforcement plate assembly is lap-connected and fixed to the lower end of the B pillar reinforcement plate assembly.

[0006] Further, the cross-sections of the plate bodies constituting the A pillar reinforcement plate assembly, the B pillar reinforcement plate assembly, the C pillar reinforcement plate assembly, and the sill reinforcement plate assembly are all in a "channel" - shaped structure.

[0007] Further, the lap length at the lap joint of the upper A pillar reinforcement plate and the lower A pillar reinforcement plate is at least 220 mm; an A pillar reinforcement support member in the shape of a box structure is provided inside the lap joint of the upper A pillar reinforcement plate and the lower A pillar reinforcement plate.

[0008] Further, the lap length between the lower end of the lower B pillar inner panel and the lower stop of the sill beam is at least 300 mm.

[0009] Further, an upwardly protruding upper B pillar reinforcing rib is provided along the length direction on the upper part of the B pillar reinforcement plate assembly. A plurality of upwardly protruding lower B pillar reinforcing ribs are provided on the lower end along the B pillar reinforcement plate assembly that overlaps with the sill reinforcement plate assembly. Among them, the upper end of the upper B pillar reinforcing rib extends to the lap joint of the B pillar reinforcement plate assembly and the upper A pillar reinforcement plate.

[0010] Further, an A pillar to B pillar joint reinforcement plate is provided inside the roof side rail. The front end of the A pillar to B pillar joint reinforcement plate is adhesively lapped on the A pillar inner panel assembly, and its rear end is adhesively lapped on the upper B pillar inner panel. An auxiliary reinforcement part is provided on the A pillar to B pillar joint reinforcement plate, and a plurality of the auxiliary reinforcement parts are arranged at intervals along the length direction of the A pillar to B pillar joint reinforcement plate.

[0011] Furthermore, the front crossbeam of the roof is welded together from two layers of crossbeam plates, and the front end of the sunroof reinforcing ring is provided with three connecting claws, each of which is bolted to the front crossbeam of the roof.

[0012] Furthermore, one side edge of the beam connecting plate is screwed and fixed to the rear beam of the top cover, and the opposite side edge is turned down to form an L-shaped flange that fits and overlaps the upper end of the C-pillar inner panel assembly. The beam connecting plate has a recessed reinforcing groove in the middle.

[0013] The advantages of this invention lie in its use of a high-rigidity rectangular frame, formed by the roof side beams, front roof crossbeam, rear roof crossbeam, and sunroof reinforcing ring. This frame is effectively connected to the A-pillar, B-pillar, C-pillar, and sill beams, creating a multi-layered, spatially three-dimensional, and continuously connected high-strength upper body frame structure. This forms multiple continuous closed-loop force transmission paths. When the roof is subjected to compressive loads, the load can be quickly and evenly distributed throughout the upper body through this reinforced frame, improving structural integrity and deformation resistance. This significantly enhances the load-bearing capacity of off-road SUVs in the event of rollovers or roof compression, ensuring the survival space of the occupants and effectively meeting stringent roof compressive strength regulations. This provides stronger safety assurance for off-road SUVs facing high-risk accidents in complex off-road conditions. The entire upper body structure is ingeniously designed and has a simple assembly process, significantly improving the compressive strength of the vehicle roof. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 yes Figure 1 A schematic diagram of the inner side of the A-pillar and B-pillar on one side of the middle.

[0016] Figure 3 yes Figure 1 Schematic diagram of the installation of the reinforcement plate at the joint between the A-pillar and the B-pillar.

[0017] Figure 4 yes Figure 3 Enlarged view of the reinforcement plate at the joint between the A-pillar and B-pillar.

[0018] Figure 5 yes Figure 1 Installation diagram of the middle crossbeam connecting plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 , 2 As shown, the upper body structure for improving the compressive strength of the top of an off-road SUV, as described in this invention, includes an upper body frame formed by a roof beam, A-pillar, B-pillar, C-pillar, and sill beam.

[0021] Specifically, the roof beam includes a pair of parallel roof side beams 1, and a front roof crossbeam 2 and a rear roof crossbeam 3 spanning between the two roof side beams 1. The roof side beams 1, the front roof crossbeam 2, and the rear roof crossbeam 3 together form a high-rigidity rectangular frame. In addition, a sunroof reinforcing ring 4 is provided inside the rectangular frame of the roof beam to compensate for the weakening of the roof rigidity caused by the sunroof opening. The front end of the sunroof reinforcing ring 4 is fixedly connected to the front roof crossbeam 2, and its left and right sides are overlapped and fixedly connected to the roof side beams 1, thereby integrating the sunroof opening area into the high-rigidity rectangular frame formed by the roof side beams 1, the front roof crossbeam 2, and the rear roof crossbeam 3, so as to jointly bear the roof compression load. Furthermore, the front crossbeam 2 of the roof is designed to be made of two layers of crossbeam plates welded together to improve its bending stiffness. At this time, three connecting claws 5 are set at the front end of the sunroof reinforcing ring 4, which are integral with it. These connecting claws 5 are irregularly shaped claws adapted to the shape of the vehicle body. The front end of each connecting claw 5 is bolted to the front crossbeam 2 of the roof with high-strength bolts. This bolted connection method is reliable, easy to assemble, and can effectively transfer longitudinal and lateral loads.

[0022] The A-pillar, a key component connecting the roof and the front of the vehicle, comprises an A-pillar reinforcement assembly 6 and an A-pillar inner panel assembly 7. The A-pillar reinforcement assembly 6 consists of an upper A-pillar reinforcement plate 6.1 and a lower A-pillar reinforcement plate 6.2. The upper and lower A-pillar reinforcement plates 6.1 and 6.2 are connected by an overlapping and welding method, with an overlap length of at least 220mm, ensuring smooth force transmission from bottom to top. Furthermore, a box-shaped A-pillar reinforcement support 8 is provided inside the overlap of the upper and lower A-pillar reinforcement plates 6.1 and 6.2. This support fills the internal cavity of the A-pillar, forming a stable "internal skeleton" structure, significantly improving the crush resistance at the joint between the upper and lower A-pillar reinforcement plates 6.1 and 6.2. Most importantly, the upper end of the upper section of the A-pillar reinforcement plate 6.1 is not only connected to the roof side beam 1, but also extends backward along the roof side beam 1, passing over the B-pillar to reach its rear. This design is one of the core innovations in force transmission, which enables the A-pillar to directly transfer the load to a more rearward area of ​​the vehicle body.

[0023] The B-pillar, serving as a core vertical support for lateral impact and top pressure resistance, comprises a B-pillar reinforcing plate assembly 9 and a B-pillar inner plate assembly 10. The upper end of the B-pillar reinforcing plate assembly 9 is overlapped and fixedly connected to the rearward extension of the upper section reinforcing plate 6.1 of the A-pillar, achieving direct force coupling between the A-pillar and B-pillar in the top region. The B-pillar inner plate assembly 10 consists of an upper section inner plate 10.1 and a lower section inner plate 10.2. The upper end of the upper section inner plate 10.1 is screwed and fixedly connected to the sunroof reinforcing ring 4 via a dedicated B-pillar connector 11. This connector 11 can be a shallow box-shaped structure, with multiple vertical reinforcing protrusions arranged side-by-side on its lower part, which is welded to the upper section inner plate 10.1. Correspondingly overlapping protrusions are also provided on the upper part of the upper section inner plate 10.1, thus establishing a second important top force transmission path between the sunroof area and the B-pillar. The lower end of the inner plate 10.2 of the lower section of the B-pillar extends downward to the lower stop of the sill beam and overlaps and is fixed thereto. The overlap length is at least 300mm. This long overlap ensures that the pressure transmitted from the B-pillar can be fully and evenly absorbed by the sill beam. Furthermore, to improve the rigidity of the B-pillar itself, an outwardly protruding upper B-pillar reinforcing rib 12 is provided along the length direction on the upper part of the B-pillar reinforcing plate assembly 9. The upper end of the B-pillar reinforcing rib 12 extends to the overlap between the B-pillar reinforcing plate assembly 9 and the upper section of the A-pillar reinforcing plate 6.1, effectively strengthening the support strength of this key connection point. At the same time, multiple outwardly protruding lower B-pillar reinforcing ribs are also provided on the lower edge of the B-pillar reinforcing plate assembly 9 that overlaps with the sill beam to enhance its local bending and deformation resistance.

[0024] As a key component for the rear support of the vehicle body, the C-column includes a C-column reinforcement panel assembly 13 and a C-column inner panel assembly 14. Among them, the upper end of the C-column reinforcement panel assembly 13 is lap-connected and fixed to the extended end of the upper A-column reinforcement panel 6.1, which enables the load at the front of the roof to be directly transmitted to the C-column through the backward extension of the upper A-column reinforcement panel 6.1; the lower end of the C-column reinforcement panel assembly 13 is lap-connected and fixed to the sturdy vehicle rear hub frame 15, finally guiding the load borne by the C-column into the vehicle body chassis and the rear vehicle structure. The upper end of the C-column inner panel assembly 14 is fixedly connected to the rear roof crossmember 3 through a crossmember connecting plate 16, completing the force transmission closed-loop at the rear of the roof; as Figure 5 shown, one side edge of the crossmember connecting plate 16 is screwed and fixed to the rear roof crossmember 3, and the opposite side edge is turned downwards to form an L-shaped flange 17 that is lap-welded and fixed to the upper end of the C-column inner panel assembly 14. Moreover, a concave reinforcing groove 18 is stamped in the middle of the crossmember connecting plate 16, significantly enhancing the stiffness of the crossmember connecting plate 16.

[0025] The sill beam serves as the base of the side frame and includes a sill reinforcement panel assembly 19 and a sill inner panel assembly 20. Among them, the front end of the sill reinforcement panel assembly 19 is lap-connected and fixed to the lower end of the lower A-column reinforcement panel 6.2, the rear end is lap-connected and fixed to the vehicle rear hub frame 15, and the middle part of the sill reinforcement panel assembly 19 is lap-connected and fixed to the lower end of the B-column reinforcement panel assembly 9. Thus, the A-column, B-column and the rear of the vehicle body are closely connected through the sill beam, forming a complete bottom support ring.

[0026] To further enhance the stiffness of the roof side rail 1 in the key area from the A-column to the B-column, as Figure 3 、 4 shown, an A-column to B-column joint reinforcement plate 21 can also be provided inside the roof side rail 1. The front end of the A-column to B-column joint reinforcement plate 21 is lap-connected and welded to the A-column inner panel assembly 7, and the rear end is similarly lap-connected and welded to the upper B-column inner panel 10.1. In order to reduce weight without sacrificing strength, auxiliary reinforcement parts 22 that are recessed inward are provided on the A-column to B-column joint reinforcement plate 21. The auxiliary reinforcement parts 22 are arranged at intervals along the length direction of the A-column to B-column joint reinforcement plate 21, playing a strengthening role similar to "ribs".

[0027] In addition, the cross-sections of the plate bodies constituting the A-column reinforcement panel assembly 6, B-column reinforcement panel assembly 9, C-column reinforcement panel assembly 13 and sill reinforcement panel assembly 19 are all designed in a "channel" shape structure. This kind of open cross-section can be butt-jointed with the corresponding inner / outer panels to easily form a closed box cross-section, thus obtaining extremely high bending and torsional stiffness while ensuring material utilization rate.

[0028] During actual processing and assembly, the roof side beam 1 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.6mm; the roof front crossbeam 2 is made of 590MPa high strength steel plate with a thickness of 1.2mm; the roof rear crossbeam 3 is made of 590MPa high strength steel plate with a thickness of 1.2mm; the sunroof reinforcing ring 4 is made of 590MPa high strength steel plate with a thickness of 1.1mm; and the upper section reinforcing plate 6.1 of the A-pillar is made of 1500MPa ultra-high strength steel plate. The A-pillar lower section reinforcement plate 6.2 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.6mm; the A-pillar inner plate assembly 7 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.4mm; the A-pillar reinforcement support 8 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.0mm; the B-pillar reinforcement plate assembly 9 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.6mm; the B-pillar upper section inner plate assembly 9 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.6mm; Plate 10.1 is made of 590MPa high-strength steel plate with a thickness of 1.0mm; the lower section inner plate 10.2 of the B-pillar is made of 1500MPa ultra-high-strength steel plate with a thickness of 1.4mm; the B-pillar connector 11 is made of 1500MPa ultra-high-strength steel plate with a thickness of 1.4mm; the C-pillar reinforcement plate assembly 13 is made of 1500MPa ultra-high-strength steel plate with a thickness of 1.6mm; the C-pillar inner plate assembly 14 is made of 1500MPa ultra-high-strength steel plate. The plate is made of 1.4mm thick steel; the crossbeam connecting plate 16 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.0mm; the sill reinforcement plate assembly 19 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.6mm; the sill inner plate assembly 20 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.4mm; the A-pillar to B-pillar joint reinforcement plate 21 is made of 1500MPa ultra-high strength steel plate with a thickness of 1.4mm.

[0029] When the roof is compressed, the load is first applied to the rectangular frame formed by the roof beams and the sunroof reinforcing ring 4. The load is then distributed downwards through multiple paths: forward, through the front crossbeam 2 of the roof to the windshield frame and the upper part of the A-pillar. Laterally, the load is transferred to the upper ends of the A-pillar, B-pillar, and C-pillar respectively through the roof side beam 1. Among them, the load transferred to the upper end of the A-pillar is partly transferred downward through the A-pillar itself to the sill reinforcement plate assembly 19, and partly transferred directly to the B-pillar reinforcement plate assembly 9 and the C-pillar reinforcement plate assembly 13 through the rearward extension of the upper end of the A-pillar reinforcement plate 6.1. The load transferred to the upper end of the B-pillar reinforcement plate assembly 9 is transferred downward through the B-pillar reinforcement plate assembly 9 to the sill reinforcement plate assembly 19, and also transferred to the sunroof reinforcement ring 4 through the B-pillar connector 11 for force redistribution. In addition, all the loads transferred to the B-pillar and C-pillar are ultimately transferred to the robust sill reinforcement plate assembly 19 and the rear wheel hub frame 15 through their lower ends, completing the closed loop of the entire force flow.

[0030] Through the aforementioned precisely designed structure, this invention successfully constructs a multi-layered, spatially three-dimensional, and continuously connected high-strength upper body frame structure, forming multiple continuous closed-loop force transmission paths. When the roof is subjected to compressive loads, the load can be quickly and evenly distributed to the entire upper body through this reinforced frame, improving the overall structural integrity and resistance to deformation. This significantly enhances the vehicle's load-bearing capacity when it rolls over or is subjected to roof pressure, making its roof compressive strength far exceed national standards and effectively meeting stringent roof compressive strength regulations. This ensures the survival space of the occupants' cabin and is particularly suitable for off-road SUVs with complex road conditions and higher rollover risks, providing stronger safety guarantees for off-road SUVs facing high-risk accidents in complex road conditions.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

Claims

1. An upper body structure for enhancing the top compressive strength of an off-road SUV, comprising an upper body frame surrounded by roof rails, A-pillars, B-pillars, C-pillars and sill beams; characterized in that: The roof rail includes a pair of parallel roof side rails, and a rectangular frame formed by a front roof cross beam and a rear roof cross beam spanning between the two roof side rails. An overhead window reinforcement ring is provided inside the roof rail. The front end of the overhead window reinforcement ring is fixedly connected to the front roof cross beam, and its left and right sides are lapped and fixedly connected to the roof side rails; The A-pillar includes an A-pillar reinforcement plate assembly and an A-pillar inner plate assembly. Among them, the A-pillar reinforcement plate assembly is composed of an upper A-pillar reinforcement plate and a lower A-pillar reinforcement plate. The connection part of the upper A-pillar reinforcement plate and the lower A-pillar reinforcement plate is lapped and fixedly connected. The upper end of the upper A-pillar reinforcement plate is lapped and fixedly connected to the roof side rail and extends backward along the roof side rail to the rear of the B-pillar; The B-pillar includes a B-pillar reinforcement plate assembly and a B-pillar inner plate assembly. Among them, the upper end of the B-pillar reinforcement plate assembly is lapped and fixedly connected to the extended section of the upper A-pillar reinforcement plate. The B-pillar inner plate assembly is composed of an upper B-pillar inner plate and a lower B-pillar inner plate. The upper end of the upper B-pillar inner plate is fixedly connected to the overhead window reinforcement ring through a B-pillar connecting piece. The lower end of the lower B-pillar inner plate extends to the lower stop of the sill beam and is lapped and fixedly connected thereto; The C-pillar includes a C-pillar reinforcement plate assembly and a C-pillar inner plate assembly. Among them, the upper end of the C-pillar reinforcement plate assembly is lapped and fixedly connected to the extended end of the upper A-pillar reinforcement plate, and its lower end is lapped and fixedly connected to the rear wheel hub frame of the vehicle. The upper end of the C-pillar inner plate assembly is fixedly connected to the rear roof cross beam through a cross beam connecting plate; The sill beam includes a sill reinforcement plate assembly and a sill inner plate assembly. Among them, the front end of the sill reinforcement plate assembly is lapped and fixedly connected to the lower end of the lower A-pillar reinforcement plate, and its rear end is lapped and fixedly connected to the rear wheel hub frame of the vehicle. The middle part of the sill reinforcement plate assembly is lapped and fixedly connected to the lower end of the B-pillar reinforcement plate assembly.

2. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 1, characterized in that: The cross-sections of the plate bodies constituting the A-pillar reinforcement plate assembly, the B-pillar reinforcement plate assembly, the C-pillar reinforcement plate assembly and the sill reinforcement plate assembly are all in a "channel" - shaped structure.

3. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 1 or 2, characterized in that: The lapping length at the lapping part of the upper A-pillar reinforcement plate and the lower A-pillar reinforcement plate is at least 220 mm.

4. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 3, characterized in that: An A-pillar reinforcement support member in the shape of a box structure is provided inside the lapping part of the upper A-pillar reinforcement plate and the lower A-pillar reinforcement plate; 5. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 1, characterized in that: The lapping length between the lower end of the lower B-pillar inner plate and the lower stop of the sill beam is at least 300 mm.

6. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 1, characterized in that: An upwardly convex upper B-pillar reinforcement rib is provided along the length direction on the upper part of the B-pillar reinforcement plate assembly, and a plurality of upwardly convex lower B-pillar reinforcement ribs are provided on the lower part of the B-pillar reinforcement plate assembly overlapping with the sill reinforcement plate assembly. Among them, the upper end of the upper B-pillar reinforcement rib extends to the lapping part of the B-pillar reinforcement plate assembly and the upper A-pillar reinforcement plate; 7. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 1, characterized in that: An A-pillar to B-pillar joint reinforcement plate is provided inside the roof side rail. The front end of the A-pillar to B-pillar joint reinforcement plate is lapped and fitted to the A-pillar inner plate assembly, and the rear end is lapped and fitted to the upper B-pillar inner plate.

8. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 7, characterized in that: An inwardly recessed auxiliary reinforcement part is provided on the A-pillar to B-pillar joint reinforcement plate, and multiple auxiliary reinforcement parts are arranged at intervals along the length direction of the A-pillar to B-pillar joint reinforcement plate.

9. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 1, characterized in that: The front crossbeam of the roof is welded together from two layers of crossbeam plates. The front end of the sunroof reinforcing ring is provided with three connecting claws, and each connecting claw is bolted to the front crossbeam of the roof.

10. The upper body structure for improving the compressive strength of the roof of an off-road SUV according to claim 1, characterized in that: One side edge of the crossbeam connecting plate is screwed and fixed to the rear crossbeam of the top cover, and the opposite side edge is turned down to form an L-shaped flange that fits and overlaps the upper end of the inner panel of the C-pillar. The crossbeam connecting plate has a recessed reinforcing groove in the middle.

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