A vehicle body structure

Abstract

The present application relates to a vehicle body structure comprising: a side panel assembly and a front body assembly, the side panel assembly including a front pillar and a hinge reinforcement assembly, the hinge reinforcement assembly being fixed to the front pillar; the front body assembly being connected to the side panel assembly, the front body assembly including a front floor assembly and a front engine compartment disposed at the top of the front floor assembly, the front floor assembly being provided with a door sill reinforcement, the door sill reinforcement being located at the junction of the front floor assembly and the front engine compartment; wherein a chamber structure is formed between the front body assembly and the front pillar, the hinge reinforcement assembly and the door sill reinforcement being both located within the chamber structure, and the hinge reinforcement assembly being further fixed to the front floor assembly and the front engine compartment. In the present invention, the hinge reinforcement assembly located within the chamber structure is not only connected to the front pillar, but also fixed to the front floor assembly and the front engine compartment. When the vehicle door and the hinge reinforcement plate are subjected to a large Y-direction impact, the force can be transferred to the front body assembly and the side panel assembly through the hinge reinforcement plate.

Description

Technical Field

[0001] The present application relates to the automotive field, and in particular to a vehicle body structure. Background Art

[0002] Automobile safety is the most important indicator among its many performance settings. How to reduce the intrusion into the passenger compartment in a collision accident, provide sufficient space for safety systems such as seats, seat belts, air curtains, and airbags to play a role, and reduce or avoid occupant injuries is the goal of all automobile manufacturers.

[0003] Traditional vehicle body structure design approaches address head-on collisions by optimizing the energy absorption and force transmission paths and performance of the anti-collision beams, engine compartment longitudinal beams, passenger compartment longitudinal beams, upper side rails, and passenger compartment door ring structures. Side impacts, on the other hand, are addressed by optimizing the energy absorption and force transmission paths and performance of the body rocker beams, door anti-collision beams, passenger compartment door ring structures, and body crossbars. However, due to the small size of the vehicle's side, the reserved side energy absorption space and capacity are often insufficient. Therefore, the primary approach to addressing side impacts is to increase side rigidity and minimize the intrusion of side impacts into the driver's side space.

[0004] Currently, there are proposals to improve the sill body by extending it in the X-direction of the vehicle body to form an extension. The end of the extension is designed as a bowl-shaped structure, and reinforcing bosses and ribs are designed on the A-pillar inner panel. This design, which forms an extension by extending the sill, and also incorporates bowl-shaped and locally reinforced bosses and ribs, replaces the sill connecting plate to improve the torsional performance of the vehicle body and reduce collision intrusion into the vehicle's passenger compartment. Because the sill body extends forward to the wheel stop edge and the bowl-shaped structure at the front end reinforces lateral strength, the lower portion of the front pillar exhibits a sharp change in material thickness and cross-sectional structure compared to the upper portion. This solution is prone to creating stress concentration areas at the junction of the sill extension and the upper portion of the lower A-pillar inner panel during side impacts. In the event of a severe side impact, this stress concentration area could cause the entire vehicle floor to shift, leading to lateral shear deformation of the front pillar and compromising the stability of the door. Summary of the Invention

[0005] The present application provides a vehicle body structure that can solve the problem in the related art that when a front pillar responds to a side collision, a stress concentration area is easily formed in the overlap area between the door sill extension and the upper part of the lower A-pillar inner panel, thereby causing lateral shear deformation of the front pillar.

[0006] An embodiment of the present application provides a vehicle body structure, which includes: a side inner panel assembly and a front body assembly, the side inner panel assembly includes a front pillar and a hinge reinforcement plate assembly, and the hinge reinforcement plate assembly is fixed to the front pillar; the front body assembly is connected to the side inner panel assembly, the front body assembly includes a front floor assembly and a front engine compartment arranged at the top of the front floor assembly, the front floor assembly is provided with a rocker reinforcement, and the rocker reinforcement is located at the junction of the front floor assembly and the front engine compartment; wherein a cavity structure is formed between the front body assembly and the front pillar, the hinge reinforcement plate assembly and the rocker reinforcement are both located inside the cavity structure, and the hinge reinforcement plate assembly is also fixed to the front floor assembly and the front engine compartment.

[0007] In one embodiment, the hinge reinforcement plate assembly includes: an upper reinforcement plate assembly and a lower reinforcement plate assembly, the upper reinforcement plate assembly includes an upper hinge reinforcement plate and an upper hinge connecting plate, the upper hinge reinforcement plate is connected to the upper hinge connecting plate, and the upper hinge reinforcement plate and the upper hinge connecting plate are fixed on the front pillar; the lower reinforcement plate assembly includes a lower hinge reinforcement plate, a lower hinge upper connecting plate and a lower hinge lower connecting plate, and the lower hinge reinforcement plate is fixed between the lower hinge upper connecting plate and the lower hinge lower connecting plate.

[0008] In one embodiment, the lower hinge reinforcement plate is a groove-shaped structure, the lower hinge reinforcement plate includes a reinforcement plate reference surface, the reinforcement plate reference surface is respectively fixed with a front flange and a rear flange on both sides of the reinforcement plate reference surface, the reinforcement plate reference surface end is provided with a welding surface, and the rear flange end is provided with a connecting plane; the lower hinge upper connecting plate is provided with a first flange of the upper connecting plate extending toward the bottom of the vehicle body and a second flange of the upper connecting plate extending toward the top of the vehicle body, the first flange of the upper connecting plate is affixed and fixed to the reinforcement plate reference surface, the front flange and the rear flange, and the lower hinge upper connecting plate has an angle with the horizontal plane, which is an acute angle; the lower hinge lower connecting plate includes a connecting plate reference surface, the connecting plate reference surface is connected to the lower hinge reinforcement plate, a flange surface is provided on one side of the connecting plate reference surface, and a mounting surface is provided at the bottom end of the connecting plate reference surface, the mounting surface has an angle with the horizontal plane, which is an acute angle, and the mounting surface has an angle with the reinforcement plate reference surface, which is an acute angle.

[0009] In one embodiment, the front floor assembly includes: a rocker inner panel assembly and a front floor assembly, the rocker inner panel assembly includes a rocker inner panel front portion and a rocker inner panel rear portion, the rocker inner panel rear portion is arranged at the end portion of the rocker inner panel front portion, the rocker reinforcement is arranged on the rocker inner panel front portion, a groove-shaped structure is formed between the rocker inner panel front portion and the front cabin, and a chamber structure is formed between the groove-shaped structure and the front pillar; the front floor assembly is fixed to the rocker inner panel assembly.

[0010] The front floor assembly comprises a sill inner panel front portion having a groove-shaped structure, an upper trim at one end of the sill inner panel front portion and a rear trim at the other end forming a "J" shape, the sill inner panel front portion including a sill inner panel reference surface, and a flange surface provided at one end of the sill inner panel reference surface;

[0011] The rear portion of the rocker inner panel is a groove-shaped structure, and the groove-shaped cross-section width and depth of the front portion and the rear portion of the rocker inner panel are the same;

[0012] A reinforcement reference surface is provided on the door sill reinforcement, and a rear flange, a front flange, an upper flange and a lower flange are respectively provided on the circumference of the reinforcement reference surface. The rear flange, the front flange, the upper flange and the lower flange are all fitted and fixed to the front of the door sill inner panel. The setting position of the door sill reinforcement is higher than the rear of the door sill inner panel, and there is a gap between the rear flange and the hinge reinforcement plate assembly.

[0013] A front floor assembly, comprising a floor body, on which are disposed an outer floor reinforcement beam, an outer reinforcement longitudinal beam structure, a front seat crossbeam, an inner reinforcement beam, and a center channel. The outer reinforcement longitudinal beam structure, the center channel, the outer floor reinforcement beam, the inner reinforcement beam, and the front seat crossbeam form a mutually perpendicular "well"-shaped frame structure.

[0014] The outer reinforcing crossbeam of the floor comprises a connecting surface, which is pressed onto the top of the outer reinforcing longitudinal beam structure and is fixedly attached to the floor body. Both ends of the connecting surface are provided with affixed surfaces, which are fixedly attached to the floor body. The connecting surface is also provided with an outer crossbeam flange, which is fixedly attached to the front portion of the door sill inner panel.

[0015] The flange structure at the end of the front cross beam of the seat is fitted and fixed to the rear part of the door sill inner plate.

[0016] In one embodiment, the front cabin includes: a base surface, a front baffle, a fender inner panel, an upper portion of a cabin floor connecting plate, a lower portion of a cabin floor connecting plate, an outer side reinforcing longitudinal beam extension plate, a front portion of a channel and a front longitudinal beam side panel, wherein the front baffle is arranged at the end portion of the base surface and is connected to the front floor assembly; the fender inner panel is arranged at one side of the base surface, the fender inner panel is connected to the front floor assembly, a groove structure is formed between the fender inner panel and the front floor assembly, a chamber structure is formed between the groove structure and the front pillar, and the door sill reinforcement is attached to the fender inner panel. On the reference plane; the upper part of the cabin floor connecting plate is arranged between the base surface and the fender inner panel; the lower part of the cabin floor connecting plate is arranged between the base surface and the fender inner panel, and is connected to the bottom end of the upper part of the cabin floor connecting plate and the front floor assembly, and the lower part of the cabin floor connecting plate is arranged as a groove-shaped opening structure; the outer reinforcing longitudinal beam extension plate is arranged between the base surface and the front fender; the front part of the channel is arranged between the base surface and the front fender, and extends along the length direction of the vehicle body; the front longitudinal beam side panel is arranged on one side of the lower part of the cabin floor connecting plate, and extends along the length direction of the vehicle body.

[0017] In one embodiment, the fender inner panel has a groove-like structure, and the lower edge of the fender inner panel is in the shape of a "J". The lower edge of the fender inner panel is fitted and fixed to the front floor assembly; a cabin floor flange is provided at one end of the upper portion of the cabin floor connecting plate, and the cabin floor flange is fitted and fixed to the lower edge of the fender inner panel; a cabin floor connecting plate flange is provided at one end of the lower portion of the cabin floor connecting plate, and the cabin floor connecting plate flange is located below the lower edge of the fender inner panel; one end of the front floor assembly is provided at the top end of the outer reinforcing longitudinal beam extension plate; the upper and lower portions of the fender inner panel are both connected and fixed to the hinge reinforcement plate assembly.

[0018] In one embodiment, the side panel inner assembly further comprises: a rocker outer panel, a windshield pillar outer panel, a rocker upper portion, and a rocker lower portion, wherein the rocker outer panel is connected to the front pillar and the hinge reinforcement plate assembly; the windshield pillar outer panel is arranged at the top of the front pillar; the rocker upper portion is connected to the front pillar, and an angle is formed between the first upper surface and the second upper surface of the rocker upper portion and the horizontal plane, and the height difference between the top of the rocker upper portion and the reinforcement reference plane of the rocker reinforcement is 10 to 20 mm, and the height difference between the reference plane of the lower portion of the cabin floor connecting plate is greater than The height of the sill is equal to the sum of the height of the upper portion of the sill and the height difference between the turning point of the lower end of the reinforcement reference surface of the sill reinforcement and the highest point of the upper portion of the sill, the upper portion of the sill having a first cavity and a second cavity; the lower portion of the sill is connected to the front pillar; there is a gap between the front pillar and the hinge reinforcement plate assembly; the reinforcement reference surface of the sill reinforcement is higher than the height of the first mounting nut on the hinge reinforcement plate assembly in the height direction, and the height difference between the reinforcement reference surface of the sill reinforcement and the first mounting nut on the hinge reinforcement plate assembly is greater than or equal to a set value.

[0019] In one embodiment, the vehicle body structure further includes: a collision connecting plate, the collision connecting plate including a first extension plate, a groove and a second extension plate, the groove being arranged between the first extension plate and the second extension plate, the first extension plate being connected to the front pillar and the hinge reinforcement plate assembly, the second extension plate being connected to the front cabin, the second extension plate being also connected to the front floor assembly, and a gap being provided between the groove and the front floor assembly and between the groove and the side inner panel assembly.

[0020] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0021] An embodiment of the present application provides a vehicle body structure, in which a chamber structure is arranged between the front body assembly and the front pillar. The hinge reinforcement plate assembly located in the chamber structure is not only connected to the front pillar, but also fixed to the front floor assembly and the front engine compartment, thereby improving the rigidity of the side inner panel assembly and the front body assembly. When the door and the hinge reinforcement plate are subjected to a large Y-direction impact, the force can be transmitted to the front body assembly and the side inner panel assembly through the hinge reinforcement plate, thereby reducing the large deformation or failure of the front door mounting point caused by the cavity compression of the front pillar; a door sill reinforcement is arranged in the chamber structure, and the door sill reinforcement is located at the junction of the front floor assembly and the front engine compartment, thereby improving the structural rigidity of the junction of the front pillar, the front floor assembly and the front engine compartment, reducing the bending deformation of the joint during a side collision, and avoiding lateral shear fracture during a head-on collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic diagram of the front portion of a body-in-white provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of a side inner panel assembly provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of a side inner panel assembly provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of a hinge reinforcement plate assembly provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of a hinge reinforcement plate assembly provided in an embodiment of the present application;

[0028] Figure 6 for Figure 5 Cross-sectional view at AA in the middle;

[0029] Figure 7 A schematic diagram of a front floor assembly provided in an embodiment of the present application;

[0030] Figure 8 A schematic diagram of a front floor assembly provided in an embodiment of the present application;

[0031] Figure 9 A schematic diagram of the front cabin provided in an embodiment of the present application;

[0032] Figure 10 A schematic diagram of the front cabin provided in an embodiment of the present application;

[0033] Figure 11 A schematic diagram of the front vehicle body assembly provided in an embodiment of the present application;

[0034] Figure 12 A schematic diagram of the front vehicle body assembly provided in an embodiment of the present application;

[0035] Figure 13 A schematic diagram of a side inner panel assembly and a front vehicle body assembly provided in an embodiment of the present application;

[0036] Figure 14 A schematic diagram of a side inner panel assembly and a front vehicle body assembly provided in an embodiment of the present application;

[0037] Figure 15 A schematic cross-sectional view of a body-in-white provided in an embodiment of the present application;

[0038] Figure 16 for Figure 15 Cross-sectional view at the middle BB;

[0039] Figure 17 for Figure 15 Cross-sectional view at CC.

[0040] In the figure: 1. Side inner panel assembly; 11. Front pillar; 12. Door sill outer panel; 13. Windshield pillar outer panel; 14. Upper hinge reinforcement plate; 15. Upper hinge connecting plate; 16. Lower hinge reinforcement plate; 1601. Reinforcement plate reference surface; 1602. Front flange; 1603. Rear flange; 1604. First mounting nut; 1605. Welding surface; 1606. Connecting plane; 1607. Second mounting nut; 17. Lower hinge upper connecting plate; 1701. Upper connecting plate first flange; 1702. Upper connecting plate second flange; 170 3. Weld nut; 18. Lower hinge lower connecting plate; 1801. Connecting plate reference surface; 1802. Lower connecting plate flange surface; 1803. Mounting surface; 19. Upper threshold; 1901. First upper surface; 1902. Second upper surface; 1903. First chamber; 1904. Second chamber; 20. Lower threshold; 2. Front floor assembly; 21. Front threshold inner panel; 2101. Upper trimming; 2102. Rear trimming; 2103. Threshold inner panel reference surface; 2104. Flange surface; 22. Rear threshold inner panel; 23. Door sill reinforcement; 2301, reinforcement reference surface; 2302, rear flange; 2303, front flange; 2304, upper flange; 2305, lower flange; 24, floor outer reinforcement beam; 2401, outer beam flange; 2402, fitting surface; 2403, connection surface; 25, outer reinforcement longitudinal beam structure; 26, floor body; 27, seat front beam; 28, inner reinforcement beam; 29, center tunnel; 3, front cabin; 31, fender inner panel; 3101, lower edge; 32, upper part of cabin floor connecting plate; 32 01. Cabin floor flange; 33. Lower part of cabin floor connecting plate; 3301. Cabin floor connecting plate flange; 3302. Through hole; 3303. Lower first flange; 3304. Lower second flange; 34. Front baffle; 3401. Baffle flange; 35. Outer reinforcing longitudinal beam extension plate; 36. Front part of passage; 37. Front longitudinal beam side plate; 4. Collision connecting plate; 401. First extension plate; 402. Second extension plate; 403. Groove; 5. Screw; 6. Bolt; 7. Side panel front reinforcement plate; 8. Side panel outer plate. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The embodiments of the present application provide a vehicle body structure that can solve the problem in the related art that, when a front pillar responds to a side collision, a stress concentration area is easily formed in the overlap area between the rocker extension and the upper part of the lower A-pillar inner panel, thereby causing lateral shear deformation of the front pillar.

[0043] See also Figures 1 to 17 , an embodiment of the present application provides a vehicle body structure, which includes: a side inner panel assembly 1 and a front body assembly, the side inner panel assembly 1 includes a front pillar 11 and a hinge reinforcement plate assembly, and the hinge reinforcement plate assembly is fixed to the front pillar 11; the front body assembly is connected to the side inner panel assembly 1, the front body assembly includes a front floor assembly 2 and a front engine compartment 3 arranged at the top of the front floor assembly 2, a rocker reinforcement 23 is provided on the front floor assembly 2, and the rocker reinforcement 23 is located at the junction of the front floor assembly 2 and the front engine compartment 3; wherein, a cavity structure is formed between the front body assembly and the front pillar 11, the hinge reinforcement plate assembly and the rocker reinforcement 23 are both located inside the cavity structure, and the hinge reinforcement plate assembly is also fixed to the front floor assembly 2 and the front engine compartment 3.

[0044] In the present application, a chamber structure is provided between the front body assembly and the front pillar 11. The hinge reinforcement plate assembly located in the chamber structure is not only connected to the front pillar 11, but also fixed to the front floor assembly 2 and the front engine compartment 3, thereby improving the rigidity of the side inner panel assembly 1 and the front body assembly. When the door and the hinge reinforcement plate are subjected to a large Y-direction impact, the force can be transmitted to the front body assembly and the side inner panel assembly 1 through the hinge reinforcement plate, thereby reducing the large deformation or failure of the front door mounting point caused by the cavity compression of the front pillar 11; a door sill reinforcement 23 is provided in the chamber structure, and the door sill reinforcement 23 is located at the junction of the front floor assembly 2 and the front engine compartment 3, thereby improving the structural rigidity of the junction of the front pillar 11, the front floor assembly 2 and the front engine compartment 3, reducing the bending deformation of the joint during a side collision, and avoiding lateral shear fracture during a head-on collision.

[0045] Furthermore, the side panel inner assembly 1 also includes a rocker outer panel 12, a windshield pillar outer panel 13, an upper rocker 19, and a lower rocker 20. In other words, the side panel inner assembly 1 consists of the front pillar 11, the hinge reinforcement plate assembly, the rocker outer panel 12, the windshield pillar outer panel 13, the upper rocker 19, and the lower rocker 20. The side panel inner assembly 1 is provided with the side panel outer panel 8 and the side panel front reinforcement panel 7.

[0046] The front door ring outer panel consists of the front pillar 11, the door sill outer panel 12, and the windshield pillar outer panel 13. Laser welding is used to integrate the front pillar 11, door sill, B-pillar, and front windshield sides into a single piece. Alternatively, these areas can be separated into several stamped parts, namely the front pillar 11, door sill outer panel 12, and windshield pillar outer panel 13, and then spot welded together to form a single assembly. The door sill outer panel 12 is connected to the front pillar 11 and the hinge reinforcement plate assembly, while the windshield pillar outer panel 13 is mounted on the top of the front pillar 11. The door sill outer panel 12 is connected to the front pillar 11 and the lower hinge lower connecting plate 18 using self-tapping screws 5.

[0047] Among them, the hinge reinforcement plate assembly includes: an upper reinforcement plate assembly and a lower reinforcement plate assembly, the upper reinforcement plate assembly includes an upper hinge reinforcement plate 14 and an upper hinge connecting plate 15, the upper hinge reinforcement plate 14 is connected to the upper hinge connecting plate 15, and the upper hinge reinforcement plate 14 and the upper hinge connecting plate 15 are fixed on the front pillar 11; the lower reinforcement plate assembly includes a lower hinge reinforcement plate 16, a lower hinge upper connecting plate 17 and a lower hinge lower connecting plate 18, and the lower hinge reinforcement plate 16 is fixed between the lower hinge upper connecting plate 17 and the lower hinge lower connecting plate 18.

[0048] Specifically, the lower hinge reinforcement plate 16, the lower hinge upper connecting plate 17, and the lower hinge lower connecting plate 18 are welded together to form the lower reinforcement plate assembly. To improve material utilization of the lower hinge reinforcement plate 16 and reduce component manufacturing costs, the lower hinge upper connecting plate 17 in this embodiment is formed separately and welded to the lower hinge reinforcement plate 16. The welding surface 1605 of the lower hinge reinforcement plate 16 and the connecting plate reference surface 1801 of the lower hinge lower connecting plate 18 are welded together. A gap is maintained between the front pillar 11 and the hinge reinforcement plate assembly. Specifically, a gap of at least 3 mm is maintained between the welding surface 1605 and the front door ring to prevent abnormal noise caused by contact between the welding edge and the front door ring when the vehicle is twisted.

[0049] The lower hinge reinforcement plate 16 is a groove-shaped structure, and the lower hinge reinforcement plate 16 includes a reinforcement plate reference surface 1601, and a front flange 1602 and a rear flange 1603 are fixed on both sides of the reinforcement plate reference surface 1601. A welding surface 1605 is provided at the end of the reinforcement plate reference surface 1601, and a connecting plane 1606 is provided at the end of the rear flange 1603.

[0050] See also Figure 4 As shown, the lower hinge reinforcement plate 16 is a trough-shaped part formed by stamping. The reinforcement plate reference surface 1601 is located at the bottom of the trough structure. The front flange 1602 and the rear flange 1603 each form an angle of at least 3 degrees with the reinforcement plate reference surface 1601 to facilitate stamping. Below the reinforcement plate reference surface 1601 is a welding surface 1605. A second mounting nut 1607 is provided below the front flange 1602, and a connecting flat surface 1606 is provided below the rear flange 1603.

[0051] The lower hinge reinforcement plate 16 has a plurality of bosses, punching holes and welding nuts 1703, and is also provided with two hinge mounting holes, in which the first mounting nuts 1604 are provided. Figure 6 As shown, a hole for a weld nut 1703 is provided on the lower hinge upper connecting plate 17, and the first mounting nut 1604 is passed through the hole of the weld nut 1703. In some embodiments, only the hinge mounting hole is provided on the lower hinge reinforcement plate 16, and the hinge is provided with a weld nut 1703 or a rivet bolt 6, eliminating the need for the first mounting nut 1604 on the lower hinge reinforcement plate 16.

[0052] See also Figure 17 As shown, the reinforcement plate reference surface 1601 of the lower hinge reinforcement plate 16 is in contact with the front door ring; the reinforcement plate reference surface 1601 of the lower hinge reinforcement plate 16 is in contact with the lower hinge upper connecting plate 17 and welded, and the welding surface 1605 maintains a gap of at least 3mm with the front door ring to avoid contact noise between the welding edge and the front door ring when the vehicle is twisted. Figure 16 As shown, the left side of the front pillar 11 is in contact with the front flange 1602 of the lower hinge reinforcement plate 16 , and the right side of the front pillar 11 is in contact with the rear flange 1603 of the lower hinge reinforcement plate 16 .

[0053] The lower hinge upper connecting plate 17 is provided with a first upper connecting plate flange 1701 extending toward the bottom end of the vehicle body and a second upper connecting plate flange 1702 extending toward the top end of the vehicle body, and a number of welding nuts 1703 are provided on the second upper connecting plate flange 1702. The first upper connecting plate flange 1701 is fitted and fixed to the reinforcing plate reference plane 1601, the front flange 1602 and the rear flange 1603. There is an angle between the lower hinge upper connecting plate 17 and the horizontal plane, which is an acute angle. The angle between the lower hinge upper connecting plate 17 and the horizontal plane is 3 to 5 degrees.

[0054] The second flange 1702 of the upper connecting plate of the lower hinge upper connecting plate 17 is in contact with the reference plane of the fender inner panel 31 of the front engine compartment 3. Bolts 6 are used between the second flange 1702 of the upper connecting plate and the fender inner panel 31 of the front engine compartment 3, passing through the through hole 3302 of the fender inner panel 31 from the inside of the vehicle to the outside of the vehicle, and tightened on the welding nut 1703 of the lower hinge upper connecting plate 17.

[0055] The lower hinge lower connecting plate 18 includes a connecting plate reference surface 1801, which is connected to the lower hinge reinforcement plate 16. A flanged surface is provided on one side of the connecting plate reference surface 1801, and a mounting surface 1803 is provided at the bottom end of the connecting plate reference surface 1801. The lower hinge lower connecting plate 18 is generally L-shaped. The connecting plate reference surface 1801 is aligned and welded to the welding surface 1605 of the lower hinge reinforcement plate 16. The lower connecting plate flanged surface 1802 is located behind the connecting plate reference surface 1801 and is aligned and welded to the connecting plane 1606 of the lower hinge reinforcement plate 16. The mounting surface 1803 is located at the bottom of the lower hinge lower connecting plate 18.

[0056] Furthermore, an acute angle is formed between the mounting surface 1803 and the horizontal plane, and an acute angle is formed between the mounting surface 1803 and the reinforcement plate reference plane 1601. Specifically, to facilitate door closure, the hinge axis of a passenger car is often set at an inward angle of 3 to 5 degrees. In the present application, the angle between the mounting surface 1803 and the horizontal plane is set at 10 to 25 degrees, that is, the angle between the mounting surface 1803 and the reinforcement plate reference plane 1601 is between 65 and 80 degrees, forming a negative angle with the reinforcement plate reference plane 1601. The stamping process cannot directly flange the reinforcement plate reference plane 1601 to form the mounting surface 1803. Therefore, a separate lower hinge lower connecting plate 18 is provided and welded to the lower hinge reinforcement plate 16.

[0057] The threshold upper portion 19 is connected to the front pillar 11. The first upper surface 1901 and the second upper surface 1902 of the threshold upper portion 19 form an angle with the horizontal plane. The threshold upper portion 19 has a first cavity 1903 and a second cavity 1904. Figure 17 As shown, the first chamber 1903 is Q1 and the second chamber 1904 is Q2.

[0058] The mounting surface 1803 of the lower hinge lower connecting plate 18 is in contact with the second cavity 1904 of the door sill upper portion 19 .

[0059] In this embodiment, the threshold upper portion 19 and the threshold lower portion 20 are both aluminum parts, which are formed by cutting uniform cross-section profiles and connecting with bolts 6 or bonding with structural adhesive.

[0060] See also Figure 17As shown, the lower part 20 of the sill is connected to the front pillar 11. Specifically, the upper part 19 and the lower part 20 of the sill are connected to the front pillar 11 by screws 5, bolts 6 or rivets. The included angle between the mounting surface 1803 of the present application and the horizontal plane ranges from 10° to 25°, that is, the included angles between the first upper surface 1901 and the second upper surface 1902 of the upper part 19 of the sill and the horizontal plane range from 10° to 25°. The reason for setting this angle range is that a crash energy absorption structure is set inside the front sill of the present application. When the front sill and the front pillar 11 are subjected to a side impact, the side (outer side) where the upper part 19 of the sill fits with the front pillar 11 is stressed first and undergoes displacement along the direction from outside to inside. Since the height of the right side of the upper part 19 of the sill is smaller and the height H2 of the middle part is larger, the right side of the upper part 19 of the sill will undergo crash deformation prior to the middle part.

[0061] Based on the above embodiments, in this embodiment, the front floor assembly 2 includes: an inner sill assembly and a front floor assembly. The inner sill assembly includes a front inner sill part 21 and a rear inner sill part 22. The rear inner sill part 22 is arranged at the end of the front inner sill part 21. A sill reinforcement 23 is arranged on the front inner sill part 21. A groove-like structure is formed between the front inner sill part 21 and the front engine compartment 3, and a chamber structure is formed between the groove-like structure and the front pillar 11.

[0062] Specifically, the front inner sill part 21 is a groove-like structure. The upper trimming 2101 at one end and the rear trimming 2102 at the other end of the front inner sill part 21 are in a "Ji" shape. The front inner sill part 21 includes a front inner sill reference surface 2103, and a flange surface 2104 is arranged at one end of the front inner sill reference surface 2103. See Figure 7 As shown, the front inner sill part 21 as a whole is in an L-shaped structure in the side view direction, the overall structure is in a groove-like shape, the upper trimming 2101 and the rear trimming 2102 are in a "Ji" shape, the bottom of the front inner sill part 21 is the front inner sill reference surface 2103, and a flange surface 2104 is arranged at the opening part.

[0063] The rear inner sill part 22 is a groove-like structure, and the widths and depths of the groove-like cross-sections of the front inner sill part 21 and the rear inner sill part 22 are the same. Specifically, the rear inner sill part 22 is regular in the side view direction, and the overall structure is in a groove-like shape. The widths and depths of the groove-like cross-sections of the front inner sill part 21 and the rear inner sill part 22 are the same, and the two parts are respectively bonded and welded at the bottom, side and flange surface 2104 of the groove. In another embodiment, the front inner sill part 21 and the rear inner sill part 22 can be combined into one stamping part to reduce the number of parts and the welding cost. The reason for splitting the side of the sill in this embodiment is that a thicker plate with a higher material yield strength can be selected for the front inner sill part 21 to improve the stiffness of the front part of the sill during a frontal collision, reduce the deformation amount of the sill towards the rear part of the vehicle body when the sill is impacted, and avoid intrusion into the occupant compartment space.

[0064] A sill reinforcement 23 is installed within the groove-shaped structure of the front portion of the inner rocker panel 21. This is a stamped part with a reinforcement base surface 2301. Surrounding this base surface 2301 are a rear flange 2302, a front flange 2303, an upper flange 2304, and a lower flange 2305. These three flanges are all secured to the front portion of the inner rocker panel 21 and connected via spot welding.

[0065] The setting position of the rocker reinforcement 23 is higher than the rear part 22 of the rocker inner panel. The reason is that the parts such as the front part 21 of the rocker inner panel, the rear part 22 of the rocker inner panel, the upper part 19 and the lower part 20 of the rocker are located at the bottom of the vehicle body, forming a front-to-back through-structure. The rigidity during a head-on collision is very strong, and a large lateral shear force is likely to occur in the area of ​​the rocker reinforcement 23. The setting of the rocker reinforcement 23 strengthens the joint at the intersection of the front pillar 11 and the rocker, avoiding bending and deformation of the joint during a side collision and lateral shear fracture during a head-on collision.

[0066] There is a gap between the rear flange 2302 and the hinge reinforcement plate assembly. Figure 16 As shown, in particular, in the present application, the difference D1 between the rear flange 2302 of the rocker reinforcement 23 and the front flange 1602 of the lower hinge reinforcement plate 16 in the X direction is not less than 8 mm, that is, the width of the rear flange 2302 of the rocker reinforcement 23 in the front-to-rear direction of the vehicle body is more than 8 mm larger than the width of the front flange 1602 of the lower hinge reinforcement plate 16 in the front-to-rear direction of the vehicle body.

[0067] Furthermore, the front floor assembly is fixed to the door sill inner panel assembly. Among them, the front floor assembly includes a floor body 26, on which are provided an outer floor reinforcement beam 24, an outer reinforcement longitudinal beam structure 25, a seat front crossbeam 27, an inner reinforcement beam 28 and a central channel 29. The outer reinforcement longitudinal beam structure 25, the central channel 29, the outer floor reinforcement beam 24, the inner reinforcement beam 28 and the seat front crossbeam 27 form a mutually perpendicular "well"-shaped frame structure; the outer floor reinforcement beam 24 includes a connecting surface 2403, which is pressed onto the top of the outer reinforcement longitudinal beam structure 25 and is bonded and fixed to the floor body 26. Bonding surfaces 2402 are provided at both ends of the connecting surface 2403, and the bonding surfaces 2402 are bonded and fixed to the floor body 26. The connecting surface 2403 is also provided with an outer crossbeam flange 2401, which is bonded and fixed to the front part 21 of the door sill inner panel; the flange structure at the end of the seat front crossbeam 27 is bonded and fixed to the rear part 22 of the door sill inner panel.

[0068] Specifically, in addition to the sill inner panel front portion 21, the sill inner panel rear portion 22 and the sill reinforcement 23 provided on the side of the front part of the front floor assembly, a floor body 26 is also provided on the horizontal plane. On the upper surface of the floor body 26, a seat front cross beam 27 extending in a left and right square shape, an outer floor reinforcement cross beam 24, and an inner reinforcement cross beam 28 are provided. An outer reinforcement longitudinal beam structure 25 and a center channel 29 extending in the front-to-back direction are provided.

[0069] Furthermore, the outer reinforcing longitudinal beam structure 25, the central channel 29, the outer reinforcing cross beam 24 and the inner reinforcing cross beam 28 of the floor, and the front cross beam 27 of the seat form a "well"-shaped frame structure that is perpendicular to each other.

[0070] Furthermore, an upward upper flange 2304 is provided on the outer side of the outer reinforcing beam 24 of the floor, which is bonded and welded to the threshold inner plate reference surface 2103 at the front of the threshold; three flanges are provided on the outer side of the front crossbeam 27 of the seat, which are bonded and welded to the reinforcement reference surface 2301 at the rear of the threshold.

[0071] On the basis of the above embodiment, in this embodiment, the front cabin 3 includes: a base surface, a front fender 34, a fender inner panel 31, an upper portion 32 of a cabin floor connecting plate, a lower portion 33 of a cabin floor connecting plate, an outer side reinforcing longitudinal beam extension plate 35, a channel front portion 36 and a front longitudinal beam side panel 37. The front fender 34 is provided at the end of the base surface and is connected to the front floor assembly 2; the fender inner panel 31 is provided at one side of the base surface, the fender inner panel 31 is connected to the front floor assembly 2, a groove structure is formed between the fender inner panel 31 and the front floor assembly 2, the groove structure forms a chamber structure with the front pillar 11, and the door sill reinforcement 23 is attached to the front pillar 11. On the reference plane of the fender inner panel 31; the upper part 32 of the cabin floor connecting plate is arranged between the base surface and the fender inner panel 31; the lower part 33 of the cabin floor connecting plate is arranged between the base surface and the fender inner panel 31, and is connected to the bottom end of the upper part 32 of the cabin floor connecting plate and the front floor assembly 2, and the lower part 33 of the cabin floor connecting plate is arranged as a groove-shaped opening structure; the outer reinforcing longitudinal beam extension plate 35 is arranged between the base surface and the front fender 34; the front part 36 of the channel is arranged between the base surface and the front fender 34, and extends along the length direction of the vehicle body; the front longitudinal beam side panel 37 is arranged on one side of the lower part 33 of the cabin floor connecting plate, and extends along the length direction of the vehicle body.

[0072] For details, see Figure 9 As shown, the fender inner panel 31 has a groove-like structure, and the lower edge 3101 of the fender inner panel 31 is in a "J" shape. The lower edge 3101 of the fender inner panel 31 is fitted and fixed to the front floor assembly 2.

[0073] In this embodiment, the cabin floor connecting plate is divided into two parts: an upper part 32 and a lower part 33. This division allows for the use of different material thicknesses and grades, while also facilitating the completion of stamping within the required number of stamping steps. In another embodiment, the upper part 32 and the lower part 33 can be combined into a single stamped part. Among them, a cabin floor flange 3201 is provided at one end of the upper part 32 of the cabin floor connecting plate, and the cabin floor flange 3201 is bonded and fixed to the lower edge 3101 of the fender inner panel 31. A cabin floor connecting plate flange 3301 is provided at one end of the lower part 33 of the cabin floor connecting plate. The cabin floor connecting plate is also provided with a lower first flange 3303, a lower second flange 3304 and a baffle flange 3401. The cabin floor connecting plate flange 3301 is located below the lower edge 3101 of the fender inner panel 31 and is bonded to the reference surface of the fender inner panel 31. The above-mentioned bonding surfaces 2402 are all spot-welded, and a through hole 3302 is provided on the cabin floor connecting plate flange 3301.

[0074] The front portion of the channel 36 and the outer reinforcing longitudinal beam extension plate 35 are both arranged along the front-to-back direction of the vehicle body and are located above the front fender 34; one end of the front floor assembly 2 is set at the top of the outer reinforcing longitudinal beam extension plate 35; the upper and lower portions of the fender inner panel 31 are both connected and fixed to the hinge reinforcement plate assembly.

[0075] The front cabin 3, the rocker inner panel assembly and the front floor assembly are connected by welding, structural adhesive bonding and standard parts to form the front vehicle body assembly.

[0076] See also Figure 11 As shown, an assembly sequence of the front engine compartment 3, the rocker inner panel assembly and the front floor assembly is as follows:

[0077] Place the front section of the front floor on the production line welding jig;

[0078] Fit the right side sill inner panel assembly to the side of the front floor assembly from right to left;

[0079] Place the front cabin 3 from top to bottom on the front floor assembly;

[0080] Since the fender inner panel 31 and the front portion 21 of the door sill inner panel on the side of the front nacelle 3 are both groove-shaped parts, when loading the parts up and down in the third step of the front nacelle 3, it is necessary to accurately plan the loading path to avoid interference between parts during the assembly process. This application recommends the use of the second assembly sequence:

[0081] Place the front nacelle 3 on the production line welding fixture;

[0082] Place the front part of the front floor assembly on the welding fixture from top to bottom. At this time, part of the structure of the front part of the front floor assembly will fall above the front engine compartment 3, thus forming a welding surface 1605;

[0083] Place the right side sill inner panel assembly along the direction from right to left and fit it to the sides of the front engine compartment 3 and the front floor.

[0084] After the front engine compartment 3, the sill inner panel assembly and the front floor assembly are assembled together, the lower edge 3101 of the lower part of the inner fender panel 31 is in contact with the upper trimming 2101 of the front part of the sill inner panel 21. The lower part 33 of the engine compartment floor connecting plate is in contact with the grooved cross-section of the front part of the sill inner panel 21 on the sill inner panel reference surface 2103. Spot welding is used on the above-mentioned contact surfaces to realize the welding of the front engine compartment 3 and the sill inner panel assembly.

[0085] The front section of the outer reinforcing longitudinal beam structure 25 falls above the outer reinforcing longitudinal beam extension plate 35. Since there is a front baffle 34 below these two parts, the outer reinforcing longitudinal beam structure 25 and the outer reinforcing longitudinal beam extension plate 35 cannot be connected by spot welding. In the embodiment of the present invention, an arc welding connection process is used.

[0086] Specifically, a bolt 6 connection method can also be used between the outer reinforcing longitudinal beam structure 25 and the outer reinforcing longitudinal beam extension plate 35.

[0087] The front section of the floor body 26 falls behind the front baffle 34, and the front section of the middle channel 29 falls behind the front part of the channel 36. Spot welding is used on the above-mentioned contact surfaces to realize the welding of the front engine compartment 3 and the front floor.

[0088] Further, an upward outer beam flange 2401 is provided on the outer side of the floor outer reinforcing cross beam 24 and is in contact with and welded to the sill inner panel reference surface 2103 of the front part of the sill inner panel 21. Three flanges are provided on the outer side of the front seat cross beam 27 and are in contact with and welded to the bottom surface of the rear part of the sill inner panel 22.

[0089] See Figure 13 As shown, the left and right side inner panel assemblies 1 are respectively assembled on the left and right sides of the front vehicle body, and the profile of the front part of the outer side panel 8 is the same as the height of the front door ring.

[0090] The inner fender panel 31 and the front part of the sill inner panel 21 form a grooved structure including the front pillar 11 and the front sill area. The above two grooved structures are in contact through the flange surface 2104 to form an approximately "mouth" - shaped closed cross-section.

[0091] In the cavity surrounded by this cross-section, the upper hinge reinforcement plate 14, the upper hinge connecting plate 15, the lower hinge reinforcement plate 16, the upper connecting plate of the lower hinge 17, the lower connecting plate of the lower hinge 18, the upper part of the sill 19 and the lower part of the sill 20 are accommodated.

[0092] See Figure 13 As shown, in addition to the welding points and structural adhesive connection, the front body assembly and the side inner panel assembly 1 are also connected with bolts 6 at the following locations: the upper section of the fender inner panel 31, from the inside of the vehicle to the outside of the vehicle, two bolts 6 are used to tighten into the two weld nuts 1703 of the upper hinge connecting plate 15; the lower section of the fender inner panel 31, from the inside of the vehicle to the outside of the vehicle, two bolts 6 are used to tighten into the two weld nuts 1703 of the lower hinge upper connecting plate 17; and the through hole 3302 of the lower part 33 of the cabin floor connecting plate, from the inside of the vehicle to the outside of the vehicle, bolts 6 are used to tighten into the weld nuts 1703 of the front part 21 of the rocker inner panel.

[0093] On the basis of the above embodiments, in this embodiment, the vehicle body structure also includes: a collision connecting plate 4, the collision connecting plate 4 includes a first extension plate 401, a groove 403 and a second extension plate 402, the groove 403 is arranged between the first extension plate 401 and the second extension plate 402, the first extension plate 401 is connected to the front pillar 11 and the hinge reinforcement plate assembly, the second extension plate 402 is connected to the front cabin 3, and the second extension plate 402 is also connected to the front floor assembly 2, and there is a gap between the groove 403 and the front floor assembly 2, and between the groove 403 and the side inner panel assembly 1.

[0094] Specifically, after the front body assembly and the side inner panel assembly 1 are assembled, bolts 6 are used to secure one end of the collision plate 4 to the side inner panel assembly 1 and the other end to the rocker inner panel assembly. The collision plate 4 only mates with the side inner panel assembly 1 and the rocker inner panel assembly at the connection point of bolts 6. The X-axis distance between the groove 403 and the side inner panel assembly 1 and the rocker inner panel assembly is no less than 3 mm to prevent interference with the collision plate 4 due to component deviation between the side inner panel assembly 1 and the rocker inner panel assembly.

[0095] Furthermore, the fixing points of the collision connecting plate 4 and the side inner panel assembly 1 are set on the rear flange 1603 of the lower hinge reinforcement plate 16. The fixing points of the collision connecting plate 4 and the rocker inner panel assembly also have a connection function to the front longitudinal beam side panel 37. These connection points are set on the front portion 21 of the rocker inner panel, and at least one fixing point is located in the cavity between the rocker reinforcement 23 and the fender inner panel 31.

[0096] In particular, the present invention proposes that the difference D1 between the rear flange 2302 of the rocker reinforcement 23 and the front flange 1602 of the lower hinge reinforcement plate 16 in the X direction is not less than 8 mm, that is, the width of the rear flange 2302 of the rocker reinforcement 23 in the front-to-rear direction of the vehicle body is more than 8 mm larger than the width of the front flange 1602 of the lower hinge reinforcement plate 16 in the front-to-rear direction of the vehicle body.

[0097] The purpose of this design is that when the lower part of the front pillar 11 is subjected to a large impact, the front pillar 11 will move toward the fender inner panel 31. The door sill reinforcement 23 and the fender inner panel 31 can wrap the hinge reinforcement plate and the front pillar 11, reducing the movement of the lower hinge reinforcement plate 16 and the front pillar 11 toward the vehicle, and avoiding a large bending of the lower part of the front pillar 11 toward the vehicle and toward the rear of the vehicle.

[0098] Due to the front wheel layout and its wheel envelope, the location of the collision link plate 4 and its mounting surface 1803 on the front pillar 11 and fender inner panel 31 is limited. To provide sufficient X-direction width for the front pillar 11 and enhance its resistance to frontal and side impacts, the increased overall width of the front pillar 11 causes the door opening seal to shift rearward, resulting in a smaller X-direction opening for the front door, potentially impacting front passenger entry and exit convenience. Excessive X-direction difference D1 between the rear flange 2302 of the rocker reinforcement 23 and the front flange 1602 of the lower hinge reinforcement plate 16 can also result in a smaller X-direction opening for the front door. Therefore, the present invention proposes that the front flange 1602 of the lower hinge reinforcement plate 16 be at least 16 mm wide to form a single row of weld points. The rear flange 2302 of the rocker reinforcement 23 is maximized, with a clearance of at least 3 mm between it and the front pillar 11 and lower hinge reinforcement plate 16 to maximize this difference D1.

[0099] The upper flange 2304 and the lower flange 2305 of the rocker reinforcement 23 are attached to the lower edge 3101 of the fender inner panel 31. Figure 17 As shown, H2 is set to be the maximum height of the rocker upper portion 19, and the distance between the turning point at the lower end of the reinforcement reference surface 2301 of the rocker reinforcement 23 and the highest point of the rocker upper portion 19 is H1. In the embodiment of the present invention, the height difference H1 between the highest point at the top of the rocker upper portion 19 and the turning point at the lower end of the reinforcement reference surface 2301 of the rocker reinforcement 23 is set to 10-20 mm. The reason for setting this height difference is that when the rocker upper portion 19 and the mounting surface 1803 of the lower hinge lower connecting plate 18 deform toward the vehicle, they can always be below the rocker reinforcement 23, thereby controlling the direction of collision deformation, reducing the amount of deformation caused by the front pillar 11 and the rocker inner panel assembly squeezing the rocker reinforcement 23, the lower portion of the cabin floor connecting plate 33, and the front fender 34 upward, and reducing the encroachment on the occupant's foot space.

[0100] Furthermore, the lower portion 33 of the cabin floor connecting plate of this embodiment is also configured as a slot-shaped opening structure, with its reference plane height (H3) oriented toward the vehicle body exterior. Furthermore, the reference plane height of the lower portion 33 of the cabin floor connecting plate is greater than or equal to the sum of the height of the upper rocker 19 and the height difference between the turning point at the lower end of the reinforcement reference plane 2301 of the rocker reinforcement 23 and the highest point of the upper rocker 19. In other words, the reference plane height H3 of the lower portion 33 of the cabin floor connecting plate is ≥ H1 + H2.

[0101] Furthermore, the reinforcement reference surface 2301 of the rocker sill reinforcement 23 is higher than the height of the first mounting nut 1604 on the hinge reinforcement plate assembly. Furthermore, the height difference between the reinforcement reference surface 2301 of the rocker sill reinforcement 23 and the first mounting nut 1604 on the hinge reinforcement plate assembly is greater than or equal to a set value, with height difference H4 ≥ 10 mm. This height difference is set so that when the door hinge, along with the first mounting nut 1604, deforms inwardly, it will be blocked by the reinforcement reference surface 2301 of the rocker sill reinforcement 23, thereby limiting further inward deformation of the door hinge.

[0102] In summary, according to the technical solution of the present application, the transmission path of the force and energy at the lower portion of the front pillar 11 during a side collision is as follows:

[0103] When a side impact force exceeds the yield strength of the components, the lower portion of the side panel 8, the front pillar 11, and the outer side of the rocker upper 19 will deform outward. Due to the cross-sectional shape and angle a of the rocker upper 19, the rocker upper 19 deforms outward first and then inward, with the first chamber, Q1, collapsing first.

[0104] After the first chamber 1903Q1 has completed its collapse and deformation, if the lower portion of the front pillar 11 still tends to deform inward, the second chamber Q2 will continue to collapse. The collapse of the second chamber 1904Q2 pulls the lower hinge lower connecting plate 18 to deform inward. The lower portion of the lower hinge lower connecting plate 18 is fixedly connected to the lower hinge reinforcement plate 16 and the upper portion of the lower hinge upper connecting plate 17, thereby enhancing the second chamber 1904Q2's ability to resist collapse.

[0105] During the collapse of the second chamber 1904Q2, the lower portion of the lower hinge lower connecting plate 18 will deform upward. By setting the height difference H1, the door sill reinforcement 23 restricts the mounting surface 1803 of the lower portion of the lower hinge lower connecting plate 18 from further upward rotation.

[0106] After the second cavity 1904Q2 has collapsed and deformed, if the lower portion of the front pillar 11 still tends to deform inwardly, the upper portion 19 of the rocker sill and the front flange 2303 of the rocker sill reinforcement 23 fall into the slot-shaped opening of the lower portion 33 of the cabin floor connecting plate, further limiting the further movement of the front pillar 11 inwardly.

[0107] The inner side of the lower part 33 of the cabin floor connecting plate has a "well"-shaped frame structure formed by the outer reinforcing longitudinal beam structure 25, the middle channel 29, the outer reinforcing crossbeam 24 and the inner reinforcing crossbeam 28 of the floor, and the front crossbeam 27 of the seat, which transmits the force to the other side of the vehicle body and maintains the integrity of the cockpit.

[0108] Therefore, in this application, the upper hinge reinforcement plate 14 and lower hinge reinforcement plate 16 located in the front pillar 11, in addition to being welded to the front door ring with multiple mating surfaces 2402 in the hinge mounting area, are also connected by bolts 6 to the fender inner panel 31 on the inner side of the vehicle body. By providing a cavity structure that runs through the inner and outer panels of the front pillar 11, the rigidity of the upper hinge mounting area is improved. When the door and hinge are subjected to a large Y-direction impact, the force can be transferred to the engine compartment and the other side of the vehicle body through the hinge reinforcement plate, reducing the possibility of significant deformation or failure of the front door mounting point due to compression of the cavity in the front pillar 11.

[0109] The lower hinge reinforcement plate 16 located in the front pillar 11 is connected to the front portion of the front door ring and the front pillar 11 at the upper portion, and also has a connection structure with the rocker inner panel assembly at the lower portion. The Y-direction impact force at the mounting point of the lower hinge reinforcement plate 16 can be transmitted to the rocker and the front floor cross member through this connection structure.

[0110] A rocker reinforcement 23 is provided in the groove-shaped structure of the rocker inner panel front portion 21. The rocker reinforcement 23 is provided at a higher position than the rocker inner panel rear portion 22 to improve the structural rigidity of the junction between the front pillar 11 and the rocker inner panel assembly, reduce bending deformation of the joint during a side impact, and avoid transverse shear fracture during a head-on impact.

[0111] The upper surface of the rocker upper portion 19 of the front pillar 11 is inclined at an angle, and the first chamber 1903 and the second chamber 1904 are provided to facilitate planning of the energy absorption path in a side impact. The first chamber 1903 preferentially collapses to absorb energy, while the collapse of the second chamber 1904 pulls the lower hinge reinforcement plate 16 inward, thereby improving the second chamber 1904's ability to cope with side impacts.

[0112] The direction in which the second chamber 1904 collapses is limited by the lower hinge lower connecting plate 18 and the rocker reinforcement 23, thereby controlling the intrusion of the front pillar 11, the lower hinge reinforcement plate 16 and the rocker inner panel assembly into the passenger foot space when the assembly is folded upward.

[0113] The cabin floor connecting plate is configured as a groove-shaped structure, further limiting the intrusion of the front pillar 11 , the upper portion of the door sill 19 and the fender inner panel 31 into the vehicle.

[0114] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0115] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0116] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present 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 the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A vehicle body structure, characterized in that: It includes: A side panel inner panel assembly (1), the side panel inner panel assembly (1) comprising a front pillar (11) and a hinge reinforcement plate assembly, the hinge reinforcement plate assembly being fixed to the front pillar (11); A front body assembly, the front body assembly being connected to the side inner panel assembly (1), the front body assembly comprising a front floor assembly (2) and a front cabin (3) arranged at the top of the front floor assembly (2), a threshold reinforcement (23) being arranged on the front floor assembly (2), the threshold reinforcement (23) being located at the junction of the front floor assembly (2) and the front cabin (3); A chamber structure is formed between the front body assembly and the front pillar (11), the hinge reinforcement plate assembly and the door sill reinforcement (23) are both located inside the chamber structure, and the hinge reinforcement plate assembly is also fixed to the front floor assembly (2) and the front cabin (3); The hinge reinforcement plate assembly comprises: a lower reinforcement plate assembly, wherein the lower reinforcement plate assembly comprises a lower hinge reinforcement plate (16); The lower hinge reinforcement plate (16) comprises a reinforcement plate reference surface (1601), and a front flange (1602) and a rear flange (1603) are respectively fixed on both sides of the reinforcement plate reference surface (1601); The door sill reinforcement member (23) is provided with a reinforcement member reference surface (2301), and the circumferential surface of the reinforcement member reference surface (2301) is respectively provided with a rear flange (2302), a front flange (2303), an upper flange (2304), and a lower flange (2305); The difference D1 between the rear flange (2302) of the door sill reinforcement (23) and the front flange (1602) of the lower hinge reinforcement plate (16) in the X direction is not less than 8 mm.

2. The vehicle body structure according to claim 1, wherein: The hinge reinforcement plate assembly further comprises: An upper reinforcement plate assembly, the upper reinforcement plate assembly comprising an upper hinge reinforcement plate (14) and an upper hinge connecting plate (15), the upper hinge reinforcement plate (14) being connected to the upper hinge connecting plate (15), and the upper hinge reinforcement plate (14) and the upper hinge connecting plate (15) being fixed to the front pillar (11); The lower reinforcement plate assembly further comprises a lower hinge upper connecting plate (17) and a lower hinge lower connecting plate (18), and the lower hinge reinforcement plate (16) is fixed between the lower hinge upper connecting plate (17) and the lower hinge lower connecting plate (18).

3. The vehicle body structure according to claim 2, wherein: The lower hinge reinforcement plate (16) is a groove-shaped structure, the end of the reinforcement plate reference surface (1601) is provided with a welding surface (1605), and the end of the rear flange (1603) is provided with a connecting plane (1606); The lower hinge upper connecting plate (17) is provided with a first upper connecting plate flange (1701) extending toward the bottom end of the vehicle body and a second upper connecting plate flange (1702) extending toward the top end of the vehicle body. The first upper connecting plate flange (1701) is fixedly fitted with the reinforcing plate reference surface (1601), the front flange (1602) and the rear flange (1603). The lower hinge upper connecting plate (17) has an angle with the horizontal plane, and the angle is an acute angle. The lower connecting plate (18) of the lower hinge includes a connecting plate reference surface (1801), the connecting plate reference surface (1801) is connected to the lower hinge reinforcing plate (16), a flanging surface is provided on one side of the connecting plate reference surface (1801), an installation surface (1803) is provided at the bottom end of the connecting plate reference surface (1801), there is an included angle between the installation surface (1803) and the horizontal plane, and this included angle is an acute angle, and there is an included angle between the installation surface (1803) and the reinforcing plate reference surface (1601), and this included angle is an acute angle.

4. The vehicle body structure according to claim 1, wherein: The front floor assembly (2) includes: An inner sill panel assembly, the inner sill panel assembly includes a front part (21) of the inner sill panel and a rear part (22) of the inner sill panel, the rear part (22) of the inner sill panel is arranged at the end of the front part (21) of the inner sill panel, a sill reinforcing member (23) is arranged on the front part (21) of the inner sill panel, a groove-like structure is formed between the front part (21) of the inner sill panel and the front engine compartment (3), and a chamber structure is formed between this groove-like structure and the front pillar (11); A front floor assembly, the front floor assembly is fixed to the inner sill panel assembly.

5. The body structure according to claim 4, wherein: The front part (21) of the inner sill panel is a groove-like structure, the upper trimming (2101) at one end and the rear trimming (2102) at the other end of the front part (21) of the inner sill panel are in a "ji" shape, the front part (21) of the inner sill panel includes an inner sill panel reference surface (2103), and a flange surface (2104) is provided at one end of the inner sill panel reference surface (2103); The rear part (22) of the inner sill panel is a groove-like structure, and the widths and depths of the groove-like cross-sections of the front part (21) of the inner sill panel and the rear part (22) of the inner sill panel are the same; The rear flanging (2302), the front flanging (2303), the upper flanging (2304) and the lower flanging (2305) are all fixedly attached to the front part (21) of the inner sill panel, the setting position of the sill reinforcing member (23) is higher than the rear part (22) of the inner sill panel, and there is a gap between the rear flanging (2302) and the hinge reinforcing plate assembly.

6. The body structure according to claim 4, wherein: The front floor assembly includes a floor body (26), a floor outer reinforcing cross beam (24), an outer reinforcing longitudinal beam structure (25), a front seat cross beam (27), an inner reinforcing cross beam (28) and a middle channel (29) are arranged on the floor body (26), and the outer reinforcing longitudinal beam structure (25), the middle channel (29), the floor outer reinforcing cross beam (24), the inner reinforcing cross beam (28) and the front seat cross beam (27) form a mutually perpendicular "well" - shaped frame structure; The outer reinforcing beam (24) of the floor comprises a connecting surface (2403), the connecting surface (2403) is pressed onto the top of the outer reinforcing longitudinal beam structure (25), and is fitted and fixed to the floor body (26), and both ends of the connecting surface (2403) are provided with fitting surfaces (2402), and the fitting surfaces (2402) are fitted and fixed to the floor body (26), and the connecting surface (2403) is further provided with an outer beam flange (2401), and the outer beam flange (2401) is fitted and fixed to the front portion of the door sill inner plate (21); The flange structure at the end of the front crossbeam (27) of the seat is fitted and fixed to the rear portion (22) of the door sill inner plate.

7. The vehicle body structure according to claim 1, wherein: The front nacelle (3) comprises: base surface; A front baffle (34), the front baffle (34) being arranged at an end portion of the base surface and connected to the front floor assembly (2); A fender inner panel (31), the fender inner panel (31) being arranged on one side of the base surface, the fender inner panel (31) being connected to the front floor assembly (2), a groove-shaped structure being formed between the fender inner panel (31) and the front floor assembly (2), a chamber structure being formed between the groove-shaped structure and the front pillar (11), and the sill reinforcement (23) being attached to the base surface of the fender inner panel (31); An upper portion (32) of a cabin floor connecting plate, wherein the upper portion (32) of the cabin floor connecting plate is arranged between the base surface and the fender inner plate (31); A cabin floor connecting plate lower portion (33), the cabin floor connecting plate lower portion (33) being arranged between the base surface and the fender inner panel (31), and being connected to the bottom end of the cabin floor connecting plate upper portion (32) and the front floor assembly (2), the cabin floor connecting plate lower portion (33) being arranged as a slot-shaped opening structure; an outer side reinforcing longitudinal beam extension plate (35), wherein the outer side reinforcing longitudinal beam extension plate (35) is arranged between the base surface and the front baffle (34); A channel front portion (36), the channel front portion (36) being arranged between the base surface and the front baffle (34) and extending along the length direction of the vehicle body; A front longitudinal beam side plate (37) is provided on one side of the lower portion (33) of the cabin floor connecting plate and extends along the length direction of the vehicle body.

8. The vehicle body structure according to claim 7, wherein: The fender inner panel (31) has a groove-shaped structure, and the lower edge (3101) of the fender inner panel (31) is in the shape of a "J" character. The lower edge (3101) of the fender inner panel (31) is fitted and fixed to the front floor assembly (2); A cabin floor flange (3201) is provided at one end of the upper portion (32) of the cabin floor connecting plate, and the cabin floor flange (3201) is fitted and fixed to the lower edge (3101) of the fender inner panel (31); A cabin floor connecting plate flange (3301) is provided at one end of the lower portion (33) of the cabin floor connecting plate, and the cabin floor connecting plate flange (3301) is located below the lower edge (3101) of the fender inner plate (31); One end of the front floor assembly (2) is arranged at the top end of the outer reinforcing longitudinal beam extension plate (35); The upper and lower parts of the fender inner plate (31) are both connected and fixed to the hinge reinforcement plate assembly.

9. The vehicle body structure according to claim 7, wherein: The side inner panel assembly (1) further includes: A threshold outer panel (12), the threshold outer panel (12) being connected to the front pillar (11) and the hinge reinforcement plate assembly; A windshield support outer plate (13), wherein the windshield support outer plate (13) is arranged at the top end of the front pillar (11); A threshold upper portion (19), the threshold upper portion (19) is connected to the front pillar (11), a first upper surface (1901) and a second upper surface (1902) of the threshold upper portion (19) form an angle with a horizontal plane, a height difference between the top of the threshold upper portion (19) and a reinforcement reference plane (2301) of the threshold reinforcement (23) is 10 to 20 mm, a height difference between the reference plane of the lower portion (33) of the cabin floor connecting plate is greater than or equal to the sum of the height of the threshold upper portion (19) and the height difference between the turning point of the lower end of the reinforcement reference plane (2301) of the threshold reinforcement (23) and the highest point of the threshold upper portion (19), and the threshold upper portion (19) has a first cavity (1903) and a second cavity (1904); A threshold lower portion (20), the threshold lower portion (20) being connected to the front pillar (11); There is a gap between the front pillar (11) and the hinge reinforcement plate assembly; The reinforcement member reference surface (2301) of the door sill reinforcement member (23) is higher than the height of the first mounting nut (1604) on the hinge reinforcement plate assembly in the height direction, and the height difference between the reinforcement member reference surface (2301) of the door sill reinforcement member (23) and the first mounting nut (1604) on the hinge reinforcement plate assembly is greater than or equal to a set value.

10. The vehicle body structure according to claim 1, wherein: The vehicle body structure further includes: A collision connecting plate (4), the collision connecting plate (4) comprising a first extension plate (401), a groove (403) and a second extension plate (402), the groove (403) being arranged between the first extension plate (401) and the second extension plate (402), the first extension plate (401) being connected to the front pillar (11) and the hinge reinforcement plate assembly, the second extension plate (402) being connected to the front cabin (3), the second extension plate (402) being further connected to the front floor assembly (2), and a gap being provided between the groove (403) and the front floor assembly (2), and between the groove (403) and the side inner panel assembly (1).

Images