Vehicle body structure

Abstract

The vehicle body structure comprises a side wall inner plate assembly and a front vehicle body assembly, the side wall inner plate assembly comprises a front stand column and a hinge reinforcing plate assembly, and the hinge reinforcing plate assembly is fixed to the front stand column; the front vehicle body assembly is connected with the side wall inner plate assembly, the front vehicle body assembly comprises a front floor assembly and a front cabin arranged at the top end of the front floor assembly, the front floor assembly is provided with a doorsill reinforcing part, and the doorsill reinforcing part is located at the joint of the front floor assembly and the front cabin; wherein a cavity structure is formed between the front vehicle body assembly and the front stand column, the hinge reinforcing plate assembly and the threshold reinforcing piece are both located in the cavity structure, and the hinge reinforcing plate assembly is further fixed to the front floor assembly and the front cabin. According to the structure, the hinge reinforcing plate assembly located in the cavity structure is connected with the front stand column and further fixed to the front floor assembly and the front cabin, and when the automobile door and the hinge reinforcing plate bear large Y-direction impact, force can be transmitted to the front automobile body assembly and the side wall inner plate assembly through the hinge reinforcing plate.

Description

Technical Field

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

[0002] The safety of a car 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 room for the safety systems such as seats, seat belts, air curtains, airbags, etc., and reduce or avoid occupant injuries are the goals that all car manufacturers strive for.

[0003] In the traditional body structure design concept, the energy absorption and force transmission paths and performance optimization of the anti-collision beam, cabin longitudinal beam, passenger compartment longitudinal beam, upper side beam, passenger compartment door ring structure, etc. are used to deal with head-on collision conditions. The energy absorption and force transmission paths and performance optimization of the body sill beam, door anti-collision beam, passenger compartment door ring structure, body cross beam, etc. are used to deal with side collision conditions. However, due to the small size of the vehicle side, the reserved side energy absorption space and capacity are often insufficient. The main method to deal with side collisions is to increase the rigidity of the side and reduce the amount of side collision intrusion into the driver's side space.

[0004] At present, there are plans to improve the door sill body, extend it along the X direction of the car body to form an extension, and design the end of the extension into a bowl-shaped structure, and design a reinforcement boss and reinforcement ribs on the A-pillar inner plate. The door sill is extended to form an extension design, and the bowl-shaped and local reinforcement bosses and reinforcement ribs are designed. The replacement of the door sill connecting plate improves the torsional performance of the car body and reduces the collision intrusion of the vehicle passenger compartment. Since the door sill body extends forward to the edge of the wheel stop, and the bowl-shaped structure of the front end is used to strengthen the side strength. However, the lower part of the front pillar has a sharp change in material thickness and cross-sectional structure compared with the upper part. When dealing with side collisions, this solution is prone to form a stress concentration area in the overlap area between the door sill extension and the upper part of the lower A-pillar inner plate. When subjected to severe side impacts, the above-mentioned stress concentration area may cause the overall displacement of the car floor, resulting in lateral shear deformation of the front pillar, affecting the stability of the door. Summary of the invention

[0005] The present application provides a vehicle body structure, which 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 plate, 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 cabin arranged at the top of the front floor assembly, and a threshold reinforcement is arranged on the front floor assembly, and the threshold reinforcement is located at the junction of the front floor assembly and the front cabin; wherein a chamber structure is formed between the front body assembly and the front pillar, the hinge reinforcement plate assembly and the threshold reinforcement are both located inside the chamber structure, and the hinge reinforcement plate assembly is also fixed to the front floor assembly and the front cabin.

[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 plane, front flanges and rear flanges are respectively fixed on both sides of the reinforcement plate reference plane, a welding surface is provided at the end of the reinforcement plate reference plane, and a connecting plane is provided at the end of the rear flange; the upper connecting plate of the lower hinge is provided with a first flange of the upper connecting plate extending toward the bottom end of the vehicle body and a second flange of the upper connecting plate extending toward the top end of the vehicle body, the first flange of the upper connecting plate is fitted and fixed with the reinforcement plate reference plane, the front flange and the rear flange, and an angle is formed between the upper connecting plate of the lower hinge and the horizontal plane, which angle is an acute angle; the lower connecting plate of the lower hinge includes a connecting plate reference plane, the connecting plate reference plane is connected to the lower hinge reinforcement plate, a flange surface is provided on one side of the connecting plate reference plane, and a mounting surface is provided at the bottom end of the connecting plate reference plane, an angle is formed between the mounting surface and the horizontal plane, which angle is an acute angle, and an angle is formed between the mounting surface and the reinforcement plate reference plane.

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

[0010] The front floor assembly, the front portion of the rocker inner panel is a groove-shaped structure, the upper trimming at one end of the front portion of the rocker inner panel and the rear trimming at the other end are in a "J" shape, the front portion of the rocker inner panel includes a rocker inner panel reference surface, and a flange surface is provided at one end of the rocker 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 of the rocker inner panel and the rear portion of the rocker inner panel are the same;

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

[0013] A front floor assembly, the front floor assembly comprising a floor body, the floor body being provided with an outer floor reinforcement beam, an outer floor reinforcement longitudinal beam structure, a seat front beam, an inner floor reinforcement beam and a middle channel, the outer floor reinforcement longitudinal beam structure, the middle channel, the outer floor reinforcement beam, the inner floor reinforcement beam and the seat front beam forming a mutually perpendicular "well" shaped frame structure;

[0014] The outer reinforcing cross beam of the floor comprises a connecting surface, the connecting surface is pressed on 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, the affixed surfaces are fixedly attached to the floor body, the connecting surface is also provided with an outer cross beam flange, the outer cross beam flange is fixedly attached to the front part of the door sill inner plate;

[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 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 an 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 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 baffle; the front part of the channel is arranged between the base surface and the front baffle, 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 a "J" shape, and the lower edge of the fender inner panel is fitted and fixed to the front floor assembly; a cabin floor flange surface is provided at one end of the upper portion of the cabin floor connecting plate, and the cabin floor flange surface is fitted and fixed to the lower edge of the fender inner panel; a cabin floor connecting plate flange surface is provided at one end of the lower portion of the cabin floor connecting plate, and the cabin floor connecting plate flange surface 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 inner panel assembly further includes: a threshold outer panel, a windshield pillar outer panel, a threshold upper portion and a threshold lower portion, wherein the threshold outer panel is connected to the front pillar and the hinge reinforcement plate assembly; the windshield pillar outer panel is arranged at the top end of the front pillar; the threshold 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 threshold upper portion and the horizontal plane, and the height difference between the top end of the threshold upper portion and the reinforcement reference plane of the threshold 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 same The upper part of the threshold has a first cavity and a second cavity, which is the sum of the height of the upper part of the threshold and the height difference between the turning point at the lower end of the reinforcement reference plane of the threshold reinforcement and the highest point of the upper part of the threshold; the lower part of the threshold is connected to the front pillar; there is a gap between the front pillar and the hinge reinforcement plate assembly; the threshold inner plate reference plane of the threshold 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 threshold inner plate reference plane of the threshold 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 also includes: a collision connecting plate, the collision connecting plate includes a first extension plate, a groove and a second extension plate, the groove is arranged between the first extension plate and the second extension plate, the first extension plate is connected to the front pillar and the hinge reinforcement plate assembly, the second extension plate is connected to the front cabin, and the second extension plate is also connected to the front floor assembly, and there is a gap between the groove and the front floor assembly and between the groove and the side inner panel assembly.

[0020] The beneficial effects brought by the technical solution 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 a front vehicle body assembly and a front pillar, and a 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 panel inner panel assembly and the front vehicle body assembly. When the vehicle door and the hinge reinforcement plate are subjected to a large Y-direction impact, the force can be transmitted to the front vehicle body assembly and the side panel inner panel assembly through the hinge reinforcement plate, thereby reducing a 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 drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0023] Figure 1 A schematic diagram of the front part 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 Sectional view at AA;

[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] Fig. 9 A schematic diagram of the front cabin provided for an embodiment of the present application;

[0032] Fig.10 A schematic diagram of the front cabin provided for an embodiment of the present application;

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

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

[0035] Fig.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] Fig.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] Fig.15 A schematic cross-sectional view of a body-in-white provided in an embodiment of the present application;

[0038] Fig.16 for Fig.15 Sectional view at the middle BB;

[0039] Fig.17 for Fig.15 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. Welding nut; 18. Lower hinge lower connecting plate; 1801. Connecting plate reference surface; 1802. Lower connecting plate flange surface; 1803. Mounting surface; 19. Upper part of threshold; 1901. First upper surface; 1902. Second upper surface; 1903. First chamber; 1904. Second chamber; 20. Lower part of threshold; 2. Front floor assembly; 21. Front part of threshold inner panel; 2101. Upper trimming; 2102. Rear trimming; 2103. Reference surface of threshold inner panel; 2104. Flange surface; 22. Rear part of threshold inner panel; 23. Door sill reinforcement; 2301, reinforcement reference surface; 2302, rear flange; 2303, front flange; 2304, upper flange; 2305, lower flange; 24, outer reinforcement beam of floor; 2401, outer beam flange; 2402, fitting surface; 2403, connection surface; 25, outer reinforcement longitudinal beam structure; 26, floor body; 27, front beam of seat; 28, inner reinforcement beam; 29, center channel; 3, front cabin; 31, inner panel of fender; 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. Screws; 6. Bolts; 7. Side enclosure front reinforcement plate; 8. Side enclosure outer plate. DETAILED DESCRIPTION

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

[0042] The embodiment of 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.

[0043] See also Figures 1 to 17 The 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 cabin 3 arranged at the top of the front floor assembly 2, and a threshold reinforcement 23 is arranged on the front floor assembly 2, and the threshold reinforcement 23 is located at the junction of the front floor assembly 2 and the front cabin 3; wherein, a chamber structure is formed between the front body assembly and the front pillar 11, the hinge reinforcement plate assembly and the threshold 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.

[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 installation 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 stiffness 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 the side collision, and avoiding the transverse shear fracture during the head-on collision.

[0045] Furthermore, the side panel inner panel assembly 1 further includes: a door sill outer panel 12, a windshield pillar outer panel 13, a door sill upper portion 19 and a door sill lower portion 20. In other words, the side panel inner panel assembly 1 is composed of the front pillar 11, the hinge reinforcement plate assembly, the door sill outer panel 12, the windshield pillar outer panel 13, the door sill upper portion 19 and the door sill lower portion 20. The side panel inner panel assembly 1 is provided with a side panel outer panel 8 and a side panel front reinforcement plate 7.

[0046] The front pillar 11, the threshold outer panel 12, and the windshield pillar outer panel 13 form the front door ring outer panel. Through laser welding technology, the front pillar 11 area, the threshold area, the B-pillar area and the front windshield side are formed into a whole. The above-mentioned areas can also be divided into several stamping parts, that is, divided into the front pillar 11, the threshold outer panel 12, and the windshield pillar outer panel 13, and spot welding is used to form an assembly. The threshold outer panel 12 is connected to the front pillar 11 and the hinge reinforcement plate assembly, and the windshield pillar outer panel 13 is set at the top of the front pillar 11. Among them, the threshold outer panel 12 is connected to the front pillar 11 and the lower hinge lower connecting plate 18 by 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 to form the lower reinforcement plate assembly; in order to improve the material utilization rate of the lower hinge reinforcement plate 16 and reduce the manufacturing cost of parts, the lower hinge upper connecting plate 17 of 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, and there is a gap between the front pillar 11 and the hinge reinforcement plate assembly, that is, the welding surface 1605 and the front door ring maintain a gap of at least 3mm, so as to avoid 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 respectively 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 groove-shaped part formed by stamping, the reinforcement plate reference surface 1601 is located at the bottom of the groove structure, and the front flange 1602 and the rear flange 1603 respectively form an angle of not less than 3 degrees with the reinforcement plate reference surface 1601 to facilitate the stamping of the part. The lower part of the reinforcement plate reference surface 1601 is a welding surface 1605, the lower part of the front flange 1602 is provided with a second mounting nut 1607, and the lower part of the rear flange 1603 has a connecting plane 1606.

[0051] The lower hinge reinforcement plate 16 has a plurality of bosses, punching holes and welding nuts 1703, and two hinge mounting holes are also provided thereon, and the hinge mounting holes are provided with first mounting nuts 1604, see Figure 6 As shown, a hole center of a welding nut 1703 is provided on the lower hinge upper connecting plate 17, and the first mounting nut 1604 passes through the hole center of the welding nut 1703. In some embodiments, only a hinge mounting hole is provided on the lower hinge reinforcing plate 16, and the hinge is provided with a welding nut 1703 or a rivet bolt 6, and the first mounting nut 1604 is not required to be provided on the lower hinge reinforcing plate 16.

[0052] See also Fig.17 As shown, the reinforcement plate reference surface 1601 of the lower hinge reinforcement plate 16 is fitted with the front door ring; the reinforcement plate reference surface 1601 of the lower hinge reinforcement plate 16 and the lower hinge upper connecting plate 17 are fitted and welded, and the welding surface 1605 maintains a gap of at least 3mm with the front door ring to avoid abnormal contact noise between the welding edge and the front door ring when the vehicle is twisted. Fig.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 of the vehicle body and a second upper connecting plate flange 1702 extending toward the top of the vehicle body, and a plurality 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 fitted with the reference surface of the fender inner panel 31 of the front engine compartment 3, and 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 along the direction from the inside of the vehicle to the outside of the vehicle, passing through the through hole 3302 of the fender inner panel 31, 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, the connecting plate reference surface 1801 is connected to the lower hinge reinforcing 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 L-shaped as a whole, the connecting plate reference surface 1801 and the welding surface 1605 of the lower hinge reinforcing plate 16 are abutted and welded; the lower connecting plate flanged surface 1802 is located at the rear of the connecting plate reference surface 1801, and is abutted and welded to the connecting plane 1606 of the lower hinge reinforcing plate 16; the mounting surface 1803 is located at the bottom of the lower hinge lower connecting plate 18.

[0056] Furthermore, there is an angle between the mounting surface 1803 and the horizontal plane, which is an acute angle, and there is an angle between the mounting surface 1803 and the reinforcing plate reference plane 1601, which is an acute angle. Specifically, in order to facilitate the closing of the door, the hinge axis of the passenger car is often set to an inclination angle of 3 to 5 degrees. The angle between the mounting surface 1803 of the present application and the horizontal plane is 10 to 25 degrees, that is, the angle between the mounting surface 1803 and the reinforcing plate reference plane 1601 is between 65 and 80 degrees, forming a negative angle with the reinforcing plate reference plane 1601. The stamping process cannot directly flanging the reinforcing plate reference plane 1601 to form the mounting surface 1803, so the lower hinge lower connecting plate 18 is separately set to be welded to the lower hinge reinforcing plate 16.

[0057] The threshold upper portion 19 is connected to the front pillar 11, and 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, see Fig.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] The threshold upper part 19 and the threshold lower part 20 in this embodiment are both aluminum parts, which are formed by cutting equal-section profiles and connecting with bolts 6 or bonding with structural adhesive.

[0060] See also Fig.17As shown, the lower part 20 of the threshold is connected to the front pillar 11. Specifically, the upper part 19 of the threshold and the lower part 20 of the threshold are connected to the front pillar 11 by screws 5, bolts 6 or rivets. The angle between the mounting surface 1803 of the present application and the horizontal plane is 10 to 25 degrees, that is, the angle between the first upper surface 1901 and the second upper surface 1902 of the upper part 19 of the threshold and the horizontal plane is 10 to 25 degrees. The reason for setting this angle range is that the present application sets a crushing energy absorption structure inside the front threshold. When the front threshold and the front pillar 11 are impacted from the side, the side (outer side) where the upper part 19 of the threshold fits the front pillar 11 is first subjected to force and displaced in the direction from the outside to the inside. Since the height of the right side of the upper part 19 of the threshold is small and the height H2 of the middle part is large, the right side of the upper part 19 of the threshold will collapse and deform before the middle part.

[0061] On the basis of the above embodiments, in this embodiment, the front floor assembly 2 includes: a rocker inner panel assembly and a front floor assembly, the rocker inner panel assembly includes a rocker inner panel front portion 21 and a rocker inner panel rear portion 22, the rocker inner panel rear portion 22 is arranged at the end of the rocker inner panel front portion 21, the rocker reinforcement 23 is arranged on the rocker inner panel front portion 21, a groove structure is formed between the rocker inner panel front portion 21 and the front engine compartment 3, and a chamber structure is formed between the groove structure and the front pillar 11.

[0062] Specifically, the front portion 21 of the rocker inner panel is a groove-shaped structure, the upper trimming 2101 at one end of the rocker inner panel front portion 21 and the rear trimming 2102 at the other end are in a "J" shape, and the rocker inner panel front portion 21 includes a rocker inner panel reference surface 2103, and a flange surface 2104 is provided at one end of the rocker inner panel reference surface 2103. Figure 7 As shown, the front portion 21 of the sill inner panel is an L-shaped structure as a whole when viewed from the side, and the overall structure is groove-shaped, the upper trim 2101 and the rear trim 2102 are in the shape of a "J", the bottom of the front portion 21 of the sill inner panel is the sill inner panel reference surface 2103, and a flange surface 2104 is provided at the opening.

[0063] The rear part 22 of the sill inner panel is a groove-shaped structure, and the width and depth of the groove-shaped section of the front part 21 of the sill inner panel and the rear part 22 of the sill inner panel are the same. Specifically, the rear part 22 of the sill inner panel is regular in the side view direction, and the overall structure is groove-shaped. The width and depth of the groove-shaped section of the front part 21 of the sill inner panel and the rear part 22 of the sill inner panel 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 part 21 of the sill inner panel and the rear part 22 of the sill inner panel can be combined into a stamping part to reduce the number of parts and reduce welding costs. The reason for splitting the side of the sill in this embodiment is that a thicker plate with a higher yield strength can be selected for the front part 21 of the sill inner panel to increase the stiffness of the front part of the sill in response to a head-on collision, reduce the deformation of the sill toward the rear of the vehicle body when it is hit, and avoid intrusion into the passenger compartment space.

[0064] A threshold reinforcement 23 is arranged inside the groove-shaped structure of the front portion 21 of the threshold inner panel. The threshold reinforcement 23 is a stamping structure, and a reinforcement reference surface 2301 is arranged on the threshold reinforcement 23. The circumference of the reinforcement 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 rear flange 2302, the front flange 2303, the upper flange 2304 and the lower flange 2305 are all fitted and fixed to the front portion 21 of the threshold inner panel, and are connected by 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 rocker inner panel front part 21, the rocker inner panel rear part 22, the rocker upper part 19 and the rocker lower part 20 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 rocker reinforcement 23 area. 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. Fig.16 As shown, in particular, in the present application, the difference D1 between the rear flange 2302 of the 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, that is, the width of the rear flange 2302 of the sill reinforcement 23 in the front-rear direction of the vehicle body is more than 8 mm greater than the width of the front flange 1602 of the lower hinge reinforcement plate 16 in the front-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 arranged the floor outer reinforcing beam 24, the outer reinforcing longitudinal beam structure 25, the seat front beam 27, the inner reinforcing beam 28 and the middle channel 29, the outer reinforcing longitudinal beam structure 25, the middle channel 29, the floor outer reinforcing beam 24 and the inner reinforcing beam 28, and the seat front beam 27 to form a mutually perpendicular "well"-shaped frame structure; the floor outer reinforcing beam 24 includes a connecting surface 2403, the connecting surface 2403 is pressed on 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 also provided with an outer beam flange 2401, and the outer beam flange 2401 is fitted and fixed to the front part 21 of the door sill inner plate; the flange structure at the end of the seat front beam 27 is fitted and fixed to the rear part 22 of the door sill inner plate.

[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 portion of the front floor assembly, a floor body 26 is provided on the horizontal plane, and a seat front cross beam 27 extending in a left-right square shape, a floor outer reinforcement cross beam 24, and an inner reinforcement cross beam 28 are provided on the upper surface of the floor body 26, and 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 middle 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 crossbeam 24 of the floor, which is fitted 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 fitted and welded to the reinforcement member reference surface 2301 at the rear of the threshold.

[0071] On the basis of the above-mentioned embodiment, in this embodiment, the front cabin 3 includes: a base surface, a front baffle 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 reinforcing longitudinal beam extension plate 35, a channel front portion 36 and a front longitudinal beam side panel 37. The front baffle 34 is arranged at the end of the base surface and is connected to the front floor assembly 2; the fender inner panel 31 is arranged 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, and a chamber structure is formed between the groove structure and 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 side reinforcing longitudinal beam extension plate 35 is arranged between the base surface and the front baffle 34; the front part 36 of the channel is arranged between the base surface and the front baffle 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 Fig. 9 As shown, the fender inner panel 31 is a groove-shaped 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] The cabin floor connecting plate of this embodiment is divided into two parts: the cabin floor connecting plate upper part 32 and the cabin floor connecting plate lower part 33. The reason for dividing into two parts is that different material thicknesses and grades can be selected for the parts, and it is convenient to complete the stamping part forming within the limited number of stamping processes. In another embodiment, the cabin floor connecting plate is divided into the cabin floor connecting plate upper part 32 and the cabin floor connecting plate lower part 33, which can be combined into one stamping part. Among them, a cabin floor flanged surface 3201 is arranged at one end of the upper part 32 of the cabin floor connecting plate, and the cabin floor flanged surface 3201 is bonded and fixed to the lower edge 3101 of the fender inner panel 31. A cabin floor connecting plate flanged surface 3301 is arranged 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 flanged surface 3303, a lower second flanged surface 3304 and a baffle flange 3401. The cabin floor connecting plate flanged surface 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 provided with spot welding connections, and a through hole 3302 is provided on the cabin floor connecting plate flanged surface 3301.

[0074] The front portion 36 of the channel and the outer reinforcing longitudinal beam extension plate 35 are arranged along the front-to-rear direction of the vehicle body and are located above the front fender 34; one end of the front floor assembly 2 is arranged 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 reinforcing plate assembly.

[0075] The front engine compartment 3, the door sill 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 Fig.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 floor front section on the production line welding fixture;

[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 engine compartment 3 from top to bottom on the front floor assembly;

[0080] Since the fender inner panel 31 and the front portion 21 of the sill inner panel on the side of the front engine compartment 3 are both groove-shaped parts, when the front engine compartment 3 is loaded in the up and down direction in the third step, the loading path needs to be accurately planned to avoid interference of parts during the assembly process. This application recommends the use of the second assembly sequence:

[0081] Placing the front engine compartment 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, some structures 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 side 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 fits with the upper trimming 2101 of the front part of the side sill inner panel 21. The lower part 33 of the engine compartment floor connecting plate fits with the grooved cross-section of the front part of the side sill inner panel 21 on the reference plane 2103 of the side sill inner panel. Spot welding is used on the above-mentioned fitting surfaces to realize the welding of the front engine compartment 3 and the side sill inner panel assembly.

[0085] The front section of the outer strengthening longitudinal beam structure 25 falls above the outer strengthening longitudinal beam extension plate 35. Since there is a front baffle 34 below these two parts, the outer strengthening longitudinal beam structure 25 and the outer strengthening 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 strengthening longitudinal beam structure 25 and the outer strengthening 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 fitting surfaces to realize the welding of the front engine compartment 3 and the front floor.

[0088] Furthermore, an upward outer beam flanging 2401 is provided on the outside of the floor outer strengthening cross beam 24 and is fitted and welded to the reference plane 2103 of the front part of the side sill inner panel 21. Three flangings are provided on the outside of the front seat cross beam 27 and are fitted and welded to the bottom surface of the rear part of the side sill inner panel 22.

[0089] See Fig.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 at the same height as the front door ring.

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

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

[0092] See Fig.13 As shown, in addition to the welding points and structural adhesive connections, the front body assembly and the side inner panel assembly 1 are also connected by 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 the two welding 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 the two welding nuts 1703 of the lower hinge upper connecting plate 17; on 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 the welding nuts 1703 of the front part 21 of the door sill 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, one end of the collision connecting plate 4 is fixed to the side inner panel assembly 1 by bolts 6, and the other end is fixed to the threshold inner panel assembly. The collision connecting plate 4 is only fitted with the side inner panel assembly 1 and the threshold inner panel assembly at the connection position of the bolts 6, and the X-direction distance between the groove 403 and the side inner panel assembly 1 and the threshold inner panel assembly is not less than 3 mm, so as to avoid interference with the collision connecting plate 4 due to the deviation of the parts of the side inner panel assembly 1 and the threshold inner panel assembly.

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

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

[0098] Affected by the front wheel arrangement position and its wheel motion envelope, the collision connecting plate 4 and its mounting surface 1803 on the front pillar 11 and the fender inner plate 31 are limited in position. In order to reserve sufficient width in the X direction for the front pillar 11, so as to improve the strength of the front pillar 11 in dealing with frontal collision and side collision. However, the increase in the overall width of the front pillar 11 will cause the door hole sealing strip to move backward, resulting in a smaller opening in the X direction of the front door, which may affect the convenience of getting on and off the front passenger. If the difference D1 between the rear flange 2302 of the sill reinforcement 23 and the front flange 1602 of the lower hinge reinforcement plate 16 in the X direction is too large, it may also cause the opening of the front door in the X direction to become smaller. Therefore, the present invention proposes that the width of the front flange 1602 of the lower hinge reinforcement plate 16 is at least 16 mm to form a row of welding points, the length of the rear flange 2302 of the sill reinforcement 23 is extended as much as possible, and a gap of more than 3 mm is reserved with the front pillar 11 and the lower hinge reinforcement plate 16, so as to maximize the difference D1.

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

[0100] Furthermore, the lower portion 33 of the cabin floor connecting plate of the present embodiment is also configured as a slot-shaped opening structure, and the height of its reference plane is, and the opening direction faces the outer side of the vehicle body. The height of 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 upper portion 19 of the sill and the height difference between the turning point of the lower end of the reinforcement reference plane 2301 of the sill reinforcement 23 and the highest point of the upper portion 19 of the sill, that is, the height H3 of the reference plane of the lower portion 33 of the cabin floor connecting plate is ≥ H1+H2.

[0101] Furthermore, the threshold inner plate reference surface 2103 of the threshold reinforcement 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 threshold inner plate reference surface 2103 of the threshold reinforcement 23 and the first mounting nut 1604 on the hinge reinforcement plate assembly is greater than or equal to a set value, and the height difference H4 is ≥ 10 mm. The reason for setting this height difference is that when the door hinge is deformed toward the inside of the vehicle together with the first mounting nut 1604, it can be blocked by the threshold inner plate reference surface 2103 of the threshold reinforcement 23, thereby limiting the door hinge from further deforming toward the inside of the vehicle.

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

[0103] When the side impact force on the lower part of the side outer panel 8, the front pillar 11 and the outer side of the upper part of the door sill 19 is greater than the yield limit of the parts, deformation from the outside will occur. Due to the cross-sectional shape and the setting of the angle a of the upper part of the door sill 19, the deformation order of the upper part of the door sill 19 is first outside and then inside, and the first chamber Q1 is collapsed first;

[0104] After the first chamber 1903Q1 has completed its collapse and deformation, if the lower portion of the front pillar 11 still has a tendency to deform toward the inside of the vehicle, the second chamber Q2 will continue to collapse, and the collapse of the second chamber 1904Q2 pulls the lower hinge lower connecting plate 18 to deform toward the inside of the vehicle, while the lower portion of the lower hinge lower connecting plate 18 is fixedly connected to the lower hinge reinforcing plate 16 and the upper portion of the lower hinge upper connecting plate 17, thereby enhancing the ability of the second chamber 1904Q2 to resist collapse;

[0105] During the collapse of the second chamber 1904Q2, the lower portion of the lower hinge lower connecting plate 18 will be deformed to flip upwards. By setting the height difference H1, the door sill reinforcement 23 limits the mounting surface 1803 of the lower portion of the lower hinge lower connecting plate 18 from further flipping upwards.

[0106] After the second chamber 1904Q2 is collapsed and deformed, if the lower portion of the front pillar 11 still has a tendency to deform toward the inside of the vehicle, the upper portion 19 of the door sill and the front flange 2303 of the door sill reinforcement 23 fall into the groove-shaped opening of the lower portion 33 of the cabin floor connecting plate, and the lower portion 33 of the cabin floor connecting plate further limits the further displacement of the front pillar 11 toward the inside of the vehicle;

[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 reinforced longitudinal beam structure 25, the middle 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, which transmits the force to the other side of the vehicle body to maintain the integrity of the cockpit.

[0108] Therefore, in the present application, the upper hinge reinforcement plate 14 and the lower hinge reinforcement plate 16 located in the front pillar 11, in addition to having a plurality of fitting surfaces 2402 welded to the front door ring in the hinge installation area, are also connected by bolts 6 on the fender inner plate 31 on the inner side of the vehicle body. By setting a chamber structure that runs through the left and right between the inner and outer plates of the front pillar 11, the rigidity of the upper hinge installation area is improved. When the door and hinge are subjected to a large Y-direction impact, the force can be transmitted to the engine compartment and the other side of the vehicle body through the hinge reinforcement plate, thereby reducing the large deformation or failure of the front door installation point caused by the compression of the cavity of the front pillar 11;

[0109] The lower hinge reinforcement plate 16 located in the front pillar 11 has a connection structure with the door sill inner panel assembly at the lower part, in addition to being connected with the front part of the front door ring and the front pillar 11 at the upper part. The Y-direction impact force of the installation point of the lower hinge reinforcement plate 16 can be transmitted to the door sill and the front floor crossbeam through the connection structure.

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

[0111] The upper surface of the upper part 19 of the door sill in the front pillar 11 is set at an inclined angle, and the first chamber 1903 and the second chamber 1904 are provided to facilitate the planning of the side impact energy absorption path; the first chamber 1903 is crushed to absorb energy first, and the second chamber 1904 pulls the lower hinge reinforcement plate 16 to move inward when crushing, thereby improving the ability of the second chamber 1904 to cope with the side impact;

[0112] The direction of collapse of the second chamber 1904 is limited by the lower hinge lower connecting plate 18 and the door sill reinforcement 23, so as to control the intrusion of the passenger foot space when the front pillar 11, the lower hinge reinforcement plate 16 and the door sill inner plate assembly are folded upward;

[0113] The cabin floor connecting plate is configured as a groove-shaped structure, which further limits 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 the present application, it should be noted that the terms "upper", "lower", etc. 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 the present application and simplifying the description, rather than indicating or implying 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 the present 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present 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 only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such 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 including 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, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0116] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

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 vehicle body assembly, the front vehicle body assembly being connected to the side inner panel assembly (1), the front vehicle body assembly comprising a front floor assembly (2) and a front engine compartment (3) arranged at the top of the front floor assembly (2), a threshold reinforcement (23) being arranged on the front floor assembly (2), and the threshold reinforcement (23) being located at the junction of the front floor assembly (2) and the front engine compartment (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 engine compartment (3).

2. The vehicle body structure according to claim 1, characterized in that: The hinge reinforcement plate assembly 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); A lower reinforcing plate assembly, the lower reinforcing plate assembly comprising a lower hinge reinforcing plate (16), a lower hinge upper connecting plate (17) and a lower hinge lower connecting plate (18), wherein the lower hinge reinforcing 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, characterized in that: The lower hinge reinforcement plate (16) is a groove-shaped structure, and 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), and 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); 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 fitted and fixed with the reinforcing plate reference surface (1601), the front flange (1602) and the rear flange (1603), and an angle is formed between the lower hinge upper connecting plate (17) and the horizontal plane, and the angle is an acute angle; The lower hinge lower connecting plate (18) comprises a connecting plate reference surface (1801), the connecting plate reference surface (1801) is connected to the lower hinge reinforcing plate (16), a flange surface is arranged on one side of the connecting plate reference surface (1801), a mounting surface (1803) is arranged at the bottom end of the connecting plate reference surface (1801), an angle is formed between the mounting surface (1803) and the horizontal plane, and the angle is an acute angle, and an angle is formed between the mounting surface (1803) and the reinforcing plate reference surface (1601), and the angle is an acute angle.

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

5. The vehicle body structure according to claim 4, characterized in that: The front part (21) of the sill inner panel is of 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 sill inner panel are in a "ji" shape. The front part (21) of the sill inner panel includes a sill inner panel reference surface (2103), and a flange surface (2104) is arranged at one end of the sill inner panel reference surface (2103); The rear part (22) of the sill inner panel is of a groove-like structure, and the groove cross-sectional width and depth of the front part (21) of the sill inner panel and the rear part (22) of the sill inner panel are the same; The sill reinforcement (23) is provided with a reinforcement reference surface (2301). Rear flanges (2302), front flanges (2303), upper flanges (2304) and lower flanges (2305) are respectively arranged on the circumferential surface of the reinforcement reference surface (2301). The rear flanges (2302), front flanges (2303), upper flanges (2304) and lower flanges (2305) are all fixedly attached to the front part (21) of the sill inner panel. The installation position of the sill reinforcement (23) is higher than that of the rear part (22) of the sill inner panel, and there is a gap between the rear flanges (2302) and the hinge reinforcement plate assembly.

6. The vehicle body structure according to claim 4, characterized in that: The front floor assembly includes a floor body (26). A floor outer reinforcement cross beam (24), an outer reinforcement longitudinal beam structure (25), a seat front cross beam (27), an inner reinforcement cross beam (28) and a middle channel (29) are arranged on the floor body (26). The outer reinforcement longitudinal beam structure (25), the middle channel (29), the floor outer reinforcement cross beam (24), the inner reinforcement cross beam (28) and the seat front cross beam (27) form a mutually perpendicular "well" shaped frame structure; The floor outer reinforcement cross beam (24) includes a connection surface (2403). The connection surface (2403) is pressed on the top of the outer reinforcement longitudinal beam structure (25) and is fixedly attached to the floor body (26). Fitting surfaces (2402) are arranged at both ends of the connection surface (2403), and the fitting surfaces (2402) are fixedly attached to the floor body (26). An outer cross beam flange (2401) is also arranged on the connection surface (2403), and the outer cross beam flange (2401) is fixedly attached to the front part (21) of the sill inner panel; The flange structure at the end of the seat front cross beam (27) is fixedly attached to the rear part (22) of the sill inner panel.

7. The vehicle body structure according to claim 1, characterized in that: The front engine compartment (3) includes: A base surface; The front baffle (34), the front baffle (34) is arranged at the end of the base surface and is connected to the front floor assembly (2); The inner fender panel (31), the inner fender panel (31) is arranged on one side of the base surface, the inner fender panel (31) is connected to the front floor assembly (2), a groove-like structure is formed between the inner fender panel (31) and the front floor assembly (2), and a chamber structure is formed between the groove-like structure and the front pillar (11), and the sill reinforcement (23) is attached to the reference surface of the inner fender panel (31); The upper part of the engine compartment floor connecting plate (32), the upper part of the engine compartment floor connecting plate (32) is arranged between the base surface and the inner fender panel (31); The lower part of the engine compartment floor connecting plate (33), the lower part of the engine compartment floor connecting plate (33) is arranged between the base surface and the inner fender panel (31) and is connected to the bottom end of the upper part of the engine compartment floor connecting plate (32) and the front floor assembly (2), and the lower part of the engine compartment floor connecting plate (33) is arranged as a groove-like opening structure; The outer side reinforcement longitudinal beam extension plate (35), the outer side reinforcement longitudinal beam extension plate (35) is arranged between the base surface and the front baffle (34); The front part of the channel (36), the front part of the channel (36) is arranged between the base surface and the front baffle (34) and extends along the vehicle body length direction; The front longitudinal beam side plate (37), the front longitudinal beam side plate (37) is arranged on one side of the lower part of the engine compartment floor connecting plate (33) and extends along the vehicle body length direction.

8. The vehicle body structure according to claim 7, wherein: The inner fender panel (31) has a groove-like structure, the lower edge (3101) of the inner fender panel (31) is in a "ji" shape, and the lower edge (3101) of the inner fender panel (31) is fixedly attached to the front floor assembly (2); One end of the upper part of the engine compartment floor connecting plate (32) is provided with an engine compartment floor flanging surface (3201), and the engine compartment floor flanging surface (3201) is fixedly attached to the lower edge (3101) of the inner fender panel (31); One end of the lower part of the engine compartment floor connecting plate (33) is provided with an engine compartment floor connecting plate flanging surface (3301), and the engine compartment floor connecting plate flanging surface (3301) is located below the lower edge (3101) of the inner fender panel (31); One end of the front floor assembly (2) is arranged at the top end of the outer side reinforcement longitudinal beam extension plate (35); Both the upper and lower parts of the inner fender panel (31) are fixedly connected to the hinge reinforcement plate assembly.

9. The vehicle body structure according to claim 7, characterized in that: The inner side panel assembly (1) further includes: The outer sill panel (12), the outer sill panel (12) is connected to the front pillar (11) and the hinge reinforcement plate assembly; The windshield pillar outer panel (13), the windshield pillar outer panel (13) is arranged at the top end of the front pillar (11); A threshold upper portion (19), the threshold upper portion (19) being connected to a front pillar (11), a first upper surface (1901) and a second upper surface (1902) of the threshold upper portion (19) forming an angle with a horizontal plane, a height difference between a top end of the threshold upper portion (19) and a reinforcement reference plane (2301) of a threshold reinforcement (23) being 10 to 20 mm, a height difference of a reference plane of a lower portion (33) of a cabin floor connecting plate being greater than or equal to a sum of a height difference between a turning point at a lower end of a reinforcement reference plane (2103) of the threshold reinforcement (23) and a highest point of the threshold upper portion (19), and the threshold upper portion (19) comprising a first chamber (1903) and a second chamber (1904); A threshold lower portion (20), wherein the threshold lower portion (20) is connected to the front pillar (11); There is a gap between the front pillar (11) and the hinge reinforcement plate assembly; The threshold inner plate reference surface (2103) of the threshold reinforcement (23) is higher in height than the height of the first mounting nut (1604) on the hinge reinforcement plate assembly, and the height difference between the threshold inner plate reference surface (2103) of the threshold reinforcement (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 comprises: 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 a front pillar (11) and a hinge reinforcement plate assembly, the second extension plate (402) being connected to a front cabin (3), the second extension plate (402) being further connected to a 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).

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