Lower vehicle body structure and vehicle

Abstract

The utility model provides a lower vehicle body structure and a vehicle. The lower vehicle body structure comprises a first reinforcing plate, a front anti-collision beam assembly and a front longitudinal beam. A first mounting plate is arranged on the front anti-collision beam assembly; a second mounting plate is arranged at the position, opposite to the first mounting plate, of the front longitudinal beam. The first mounting plate is in bolted connection with the second mounting plate; the first reinforcing plate is connected between the end face, deviating from the first mounting plate, of the second mounting plate and the outer side wall of the front longitudinal beam. According to the utility model, the collision safety of the vehicle is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and particularly relates to a lower vehicle body structure and a vehicle. Background Art

[0002] When a vehicle is involved in a small offset frontal collision, the lower body structural components on the impacted side of the vehicle are subjected to a large collision force, which can easily lead to failure of the connection at the welding position between the front anti-collision beam assembly and the front longitudinal beam on the impacted side, thereby easily causing a large intrusion into the passenger compartment, endangering the safety of the occupants and reducing the collision safety of the vehicle. Utility Model Content

[0003] The utility model aims at the technical problems in the prior art that the collision safety of the lower vehicle body structure is low during a small offset collision, and provides a lower vehicle body structure and a vehicle.

[0004] In view of the above technical problems, an embodiment of the utility model provides a lower vehicle body structure, including a front anti-collision beam assembly, a front longitudinal beam and a first reinforcement plate; a first mounting plate is provided on the front anti-collision beam assembly; a second mounting plate is provided on the front longitudinal beam at a position opposite to the first mounting plate; the first mounting plate is bolted to the second mounting plate; the first reinforcement plate is connected between the end surface of the second mounting plate facing away from the first mounting plate and the outer side wall of the front longitudinal beam.

[0005] A vehicle comprises the lower vehicle body structure.

[0006] The lower vehicle body structure provided by the utility model includes an anti-collision beam assembly, a front longitudinal beam and a first reinforcing plate; a first mounting plate is provided on the front anti-collision beam assembly; a second mounting plate is provided on the front longitudinal beam at a position opposite to the first mounting plate; the first mounting plate is bolted to the second mounting plate; the first reinforcing plate is connected between the end face of the second mounting plate away from the first mounting plate and the outer side wall of the front longitudinal beam. In the utility model, the connection strength between the front anti-collision beam assembly and the front longitudinal beam is strengthened by the bolt connection between the first mounting plate and the second mounting plate, and the bolt connection position between the front anti-collision beam assembly and the front longitudinal beam is not easy to fail when subjected to a small offset collision; and the first reinforcing plate is provided between the second mounting plate and the front longitudinal beam, the connection strength between the front anti-collision beam assembly and the front longitudinal beam is further strengthened, and the longitudinal support strength of the front anti-collision beam assembly is increased at the same time, thereby improving the collision safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0008] Figure 1 It is a structural schematic diagram of a lower vehicle body structure provided by an embodiment of the utility model.

[0009] Figure 2 It is a partial structural schematic diagram of a lower vehicle body structure provided by an embodiment of the utility model.

[0010] Figure 3 It is a schematic structural diagram of an energy absorption box of a lower vehicle body structure provided by an embodiment of the utility model.

[0011] Figure 4 It is a partial structural schematic diagram of a lower vehicle body structure provided by another embodiment of the utility model.

[0012] Figure 5 It is a partial structural schematic diagram of a lower vehicle body structure provided by another embodiment of the utility model.

[0013] Figure 6 It is a partial structural schematic diagram of a lower vehicle body structure provided by another embodiment of the utility model.

[0014] Figure 7 It is a structural schematic diagram of a combined beam frame of a lower vehicle body structure provided by another embodiment of the utility model.

[0015] Figure 8 It is a partial structural schematic diagram of a lower vehicle body structure provided by another embodiment of the utility model.

[0016] Fig. 9 It is a partial structural schematic diagram of a lower vehicle body structure provided by another embodiment of the utility model.

[0017] Fig.10 It is a partial structural schematic diagram of an A-pillar assembly of a lower vehicle body structure provided by another embodiment of the utility model.

[0018] Fig.11 It is a partial structural schematic diagram of a lower vehicle body structure provided by another embodiment of the utility model.

[0019] Fig.12 It is a partial structural schematic diagram of a lower vehicle body structure provided by another embodiment of the utility model.

[0020] The reference numerals in the specification are as follows:

[0021] 100. first reinforcing plate; 110. longitudinal reinforcing ribs;

[0022] 200, front anti-collision beam assembly; 210, first mounting plate; 220, front anti-collision beam; 221, beam body; 2211, corner cut; 22111, right-angle side; 22112, front bevel side; 222, first reinforcing rib; 223, second reinforcing rib; 230, energy absorption box; 231, box body; 2311, collapse inducing rib; 232, inner rib plate;

[0023] 300, front longitudinal beam; 310, second mounting plate; 320, first bending portion; 330, second bending portion;

[0024] 400, combined beam frame; 410, first cross beam; 420, second cross beam; 430, second reinforcement plate;

[0025] 500, mounting bracket;

[0026] 600, upper longitudinal beam;

[0027] 700, front wheel housing plate; 710, wheel housing reinforcement plate; 711, raised portion;

[0028] 800, A-pillar assembly; 810, A-pillar inner panel; 820, A-pillar outer panel; 830, connecting wire;

[0029] 900, front longitudinal beam connecting plate;

[0030] 1000, third reinforcement plate;

[0031] 1100, front wall panel; 1110, front wall reinforcement plate; 1120, reinforcement cross beam;

[0032] 1200, floor; 1210, center channel board;

[0033] 1300, threshold;

[0034] 1400, fourth reinforcement plate; 1500, middle channel reinforcement plate;

[0035] 1600, front floor crossbeam; 1700, seat crossbeam. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0038] In the present invention, in order to better illustrate the structure of the lower body structure and its connection relationship, the "front" referred to in the present invention is Figure 6The upper side shown in (i.e., the front side of the vehicle when it is running normally); the “rear” referred to in this utility model refers to Figure 6 The “upper” in this utility model refers to the side toward the roof of the vehicle when the vehicle is driving normally, and the “lower” in this utility model refers to the side toward the bottom of the vehicle when the vehicle is driving normally; the “left” in this utility model refers to the left side. Figure 6 The left side of the lower vehicle body structure shown in FIG. 1 (i.e., the left side when the vehicle is normally traveling) and the "right side" referred to in the present invention refers to the Figure 6 The right side of the lower vehicle body structure shown in the figure (that is, the right side when the vehicle is driving normally). The "longitudinal direction" referred to in this utility model refers to the length direction of the vehicle body, the "lateral direction" referred to in this utility model refers to the width direction of the vehicle body, and the "vertical direction" referred to in this utility model refers to the height direction of the vehicle body.

[0039] like Figures 1 to 12 As shown, an embodiment of the utility model provides a lower vehicle body structure, including a front anti-collision beam assembly 200, a front longitudinal beam 300 and a first reinforcing plate 100; a first mounting plate 210 is provided on the front anti-collision beam assembly 200; a second mounting plate 310 is provided on the front longitudinal beam 300 at a position opposite to the first mounting plate 210; the first mounting plate 210 is bolted to the second mounting plate 310; the first reinforcing plate 100 is connected between the end face of the second mounting plate 310 facing away from the first mounting plate 210 and the outer side wall of the front longitudinal beam 300.

[0040] In this embodiment, the lower body structure is a part of the vehicle body. The vehicle includes but is not limited to a fuel-powered vehicle, an electric vehicle or a hybrid vehicle. The front anti-collision beam assembly 200 extends in the width direction of the vehicle body, and two first mounting plates 210 are symmetrically arranged on the left and right sides of the front anti-collision beam assembly 200. The front longitudinal beam 300 extends in the length direction of the vehicle body. The number of the front longitudinal beams 300 can be two, and the second mounting plate 310 is arranged on one end of the two front longitudinal beams 300 facing the front anti-collision beam assembly 200. The first mounting plates 210 on the two front anti-collision beam assemblies 200 are respectively bolted to the second mounting plates 310 on the two front longitudinal beams 300, so that the front anti-collision beam assembly 200 is supported on the front side of the vehicle body by the two front longitudinal beams 300. When a collision occurs in the vehicle, the front anti-collision beam assembly 200 can withstand and absorb the collision energy on the front side of the vehicle body (including the front or side front, etc.), and then disperse the collision energy that cannot be absorbed to the two front longitudinal beams 300, and further absorb the collision energy through the front longitudinal beams 300.

[0041] During the transmission of the above-mentioned collision energy, the first mounting plate 210 and the second mounting plate 310 are connected by bolts, which can strengthen the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300 and avoid failure of the connection between the front anti-collision beam assembly 200 and the front longitudinal beam 300. The first reinforcing plate 100 is connected between the end surface of the second mounting plate 310 away from the first mounting plate 210 and the outer side wall of the front longitudinal beam 300, so that the end of the first reinforcing plate 100 away from the outer side wall of the front longitudinal beam 300 can be connected to the first mounting plate 210 through the second mounting plate 310, so that the front anti-collision beam assembly 200 provided with the first mounting plate 210 can be supported on the outer side wall of the front longitudinal beam 300 through the first reinforcing plate 100, thereby further strengthening the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300, and at the same time increasing the longitudinal support strength of the front anti-collision beam assembly 200, further avoiding the failure of the connection between the front anti-collision beam assembly 200 and the front longitudinal beam 300 when the vehicle is subjected to a small offset collision.

[0042] It can be understood that the front end of the first reinforcing plate 100 away from the outer side wall of the front longitudinal beam 300 can be welded or / and bolted to the second mounting plate 310; the front end of the first reinforcing plate 100 can also be directly connected to the second mounting plate 310 and the first mounting plate 210 by bolts. The rear end of the first reinforcing plate 100 away from the second mounting plate 310 can also be connected to the outer side wall of the front longitudinal beam 300 by welding or / and bolting, so as to strengthen the connection strength between the first reinforcing plate 100 and the front longitudinal beam 300 and avoid failure of the connection between the first reinforcing plate 100 and the front longitudinal beam 300.

[0043] In the above-mentioned embodiment of the utility model, the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300 is strengthened by the bolt connection between the first mounting plate 210 and the second mounting plate 310, and the bolt connection position between the front anti-collision beam assembly 200 and the front longitudinal beam 300 is not easy to fail when subjected to a small offset collision; and, by arranging the first reinforcing plate 100 between the second mounting plate 310 and the front longitudinal beam 300, the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300 is further strengthened, and at the same time, the longitudinal support strength of the front anti-collision beam assembly 200 is increased, thereby improving the collision safety of the vehicle.

[0044] like Figure 2As shown, in one embodiment, at least one longitudinal reinforcing rib 110 is provided on the first reinforcing plate 100. It can be understood that the longitudinal reinforcing rib 110 is protruded on the first reinforcing plate 100 substantially along the length direction of the vehicle body to strengthen the longitudinal structural strength of the first reinforcing plate 100. The longitudinal reinforcing rib 110 can directly contact the second mounting plate 310 and the side wall of the front longitudinal beam 300, so that it abuts between the second mounting plate 310 and the side wall of the front longitudinal beam 300 when the front anti-collision beam assembly 200 and the front longitudinal beam 300 just undergo relative deformation; the longitudinal reinforcing rib 110 may not directly contact the second mounting plate 310 and the side wall of the front longitudinal beam 300, but abuts between the second mounting plate 310 and the side wall of the front longitudinal beam 300 after the front anti-collision beam assembly 200 and the front longitudinal beam 300 just undergo a certain relative deformation. The number of the longitudinal reinforcing ribs 110 can be set according to actual conditions, as long as the longitudinal structural strength of the first reinforcing plate 100 can be strengthened.

[0045] like Figure 2 As shown, in one embodiment, the front bumper beam assembly 200 includes a front bumper beam 220 and an energy absorption box 230 connected between the front bumper beam 220 and the first mounting plate 210. It can be understood that the front bumper beam 220 and the energy absorption box 230 can be aluminum extrusion moldings. The front bumper beam 220 can be arched toward the front side of the vehicle body, and the first mounting plate 210 is substantially perpendicular to the length direction of the vehicle body. Therefore, the projection of the energy absorption box 230 connected between the front bumper beam 220 and the first mounting plate 210 on the horizontal plane is substantially trapezoidal. The energy absorption box 230 is connected to the second mounting plate 310 through the first mounting plate 210. Therefore, the energy absorption box 230 is arranged at the front end of the outer side wall of the first reinforcing plate 100 away from the front longitudinal beam 300. The projection of the rear end of the energy absorption box 230 away from the front bumper beam 220 in the length direction of the vehicle body at least partially overlaps with the projection of the front longitudinal beam 300 and the first reinforcing plate 100 in the length direction of the vehicle body. That is, after the collision energy of the front bumper beam 220 is transferred to the energy absorbing box 230, the end of the energy absorbing box 230 away from the front bumper beam 220 is supported by the front longitudinal beam 300 and / or the first reinforcing plate 100, thereby, the collision energy can be more evenly applied to the energy absorbing box 230, and the energy absorbing box 230 can be fully and stably crushed during the collision, thereby improving the crushing performance of the energy absorbing box 230.

[0046] like Figure 3As shown, in one embodiment, the energy absorbing box 230 includes a box body 231 having a crush space, and at least one inner rib plate 232 extending longitudinally in the crush space; the inner rib plate 232 is perpendicular to the first mounting plate 210; and the box body 231 is provided with at least one crush inducing rib 2311. It can be understood that the crush inducing rib 2311 is arranged on the box body 231 in a horizontal or vertical direction, and is substantially perpendicular to the length direction of the inner rib plate 232, so that when the box body 231 is subjected to collision energy transmitted in the length direction of the vehicle body, the box body 231 can be induced to crush stably in the length direction of the vehicle body. The inner rib plate 232 is perpendicular to the first mounting plate 210, so that when subjected to a front collision, the crush inducing rib 2311 can induce the box body 231 to crush stably in the longitudinal direction, and the inner rib plate 232 can strengthen the structural strength of the box body 231 in the length direction of the vehicle body, so that the energy absorbing box 230 can absorb more collision energy.

[0047] like Figure 3 to Figure 4 As shown, in one embodiment, the inner rib plate 232 is arranged in the crush space along a direction substantially perpendicular to the horizontal plane, and the opposite ends are connected between the front anti-collision beam 220 and the first mounting plate 210, thereby dividing the crush space into an outer subspace and an inner subspace. The lateral width ratio of the outer subspace and the inner subspace in the vehicle body width direction is 5:4. The lateral width of the outer subspace is greater than the lateral width of the inner subspace. In a further embodiment, the crush inducing rib 2311 includes two first inducing ribs evenly spaced on the outer side wall of the box body 231 corresponding to the outer subspace, and the outer side wall of the box body 231 corresponding to the outer subspace can be longitudinally divided into three sections by the first inducing ribs. The crush inducing rib 2311 also includes two second inducing ribs spaced apart on the inner subspace; wherein the rear second inducing rib is aligned with the rear first inducing rib, and the front second inducing rib is arranged in the middle position between the rear second inducing rib and the end of the box body 231, and the front first inducing rib is arranged in the middle position between the rear first inducing rib and the end of the box body 231, thereby ensuring that the energy absorption box 230 can be sequentially and fully stably crushed when hit by the front side of the vehicle body, and the energy absorption of the energy absorption box 230 can be increased by 6%.

[0048] like Figures 4 to 5As shown, in one embodiment, the front anti-collision beam 220 includes a beam body 221 provided with an energy absorption space, and a first reinforcing rib 222 and a second reinforcing rib 223 installed in the energy absorption space along the length direction of the beam body 221; the first reinforcing rib 222 and the second reinforcing rib 223 are arranged at intervals; on a cross section perpendicular to the length direction of the beam body 221, the first reinforcing rib 222 is arched in a direction away from the second reinforcing rib 223; the second reinforcing rib 223 is arched in a direction away from the first reinforcing rib 222. It can be understood that the first reinforcing rib 222 and the second reinforcing rib 223 can be evenly spaced in the energy absorption space. When the front anti-collision beam 220 is impacted, the first reinforcing rib 222 and the second reinforcing rib 223 are arranged, so that the impact force can be more evenly applied. And the collapse is more stable and controllable, thereby improving the energy absorption capacity of the front anti-collision beam 220.

[0049] like Figure 5 As shown, in one embodiment, two chamfered portions 2211 are symmetrically arranged at both ends of the beam body 221, and the chamfered portion 2211 includes a right-angled side 22111 arranged at the end of the beam body 221, and a front side bevel 22112 connected between the right-angled side 22111 and the front end face of the beam body 221; one end of the right-angled side 22111 away from the front side bevel 22112 is connected to the rear end face of the beam body 221, and the right-angled side 22111 is substantially perpendicular to the rear end face of the beam body 221. It can be understood that the two chamfered portions 2211 are symmetrically arranged at both ends of the beam body 221, so that the beam body 221 can be effectively collapsed and deformed. The shape of the chamfered portion 2211 can be specifically set according to actual conditions. In one embodiment, the angle between the front bevel 22112 and the rear end face of the beam body 221 is 30 degrees, and the length of the right-angled side 22111 is 8 mm; the arch height of the first reinforcing rib 222 or the second reinforcing rib 223 is 2.2 mm, so that the front anti-collision beam 220 can collapse more stably and the energy absorption capacity is improved by 4%.

[0050] like Figure 1 and Figure 6As shown, in one embodiment, the lower body structure includes two parallel front longitudinal beams 300, and two first mounting plates 210 are symmetrically arranged on the front anti-collision beam assembly 200; the two first mounting plates 210 are respectively bolted to the second mounting plates 310 on the two front longitudinal beams 300; the lower body structure also includes a composite beam frame 400 connected between the two front longitudinal beams 300; the composite beam frame 400 includes a first cross beam 410, a second cross beam 420, and a second reinforcing plate 430 connected between the first cross beam 410 and the second cross beam 420; both ends of the first cross beam 410 and the second cross beam 420 are respectively connected to the two front longitudinal beams 300. It can be understood that the two ends of the first cross beam 410 and the second cross beam 420 are respectively connected to the two front longitudinal beams 300, thereby forming a stable quadrilateral structure, and the second reinforcing plate 430 can strengthen the structural strength of the quadrilateral structure. The collision force along the length direction of the vehicle body received by one end of the first cross beam 410 can be transmitted to the other end of the first cross beam 410 connected to the second cross beam 420. Therefore, the composite beam frame 400 is installed between the two front longitudinal beams 300, and can form a support between the two front longitudinal beams 300, and can transmit the collision energy received by one front longitudinal beam 300 to the other front longitudinal beam 300, thereby dispersing the collision energy, avoiding the front longitudinal beam 300 on the collision side from receiving excessive collision energy and invading the passenger compartment in a small offset collision, causing damage to the occupants, and improving the collision safety of the vehicle.

[0051] like Figure 6 to Figure 7As shown, in one embodiment, the front longitudinal beam 300 is provided with a first bending portion 320 and a second bending portion 330; the second cross beam 420 is provided between the first bending portion 320 and the second bending portion 330, and the second reinforcing plate 430 is aligned with the first bending portion 320. It can be understood that the first bending portion 320 or the second bending portion 330 includes but is not limited to one or more of a guide groove or an avoidance groove, as long as it can be used to guide the collapse of the front longitudinal beam 300, thereby reducing the acceleration generated when the end of the front longitudinal beam 300 away from the front anti-collision beam assembly 200 is hit, thereby reducing the damage to the occupants. After the front longitudinal beam 300 is hit, the collision force is first transmitted to the position of the front longitudinal beam 300 corresponding to the first bending portion 320, and then the first bending, crushing and energy absorption occurs at this position. Then, the collision force continues to be transmitted to the position corresponding to the second bending portion 330 of the front longitudinal beam 300, and the second bending, crushing and energy absorption occurs at this position, thereby improving the energy absorption effect of the front longitudinal beam 300. It can be understood that the second cross beam 420 is arranged between the first bending portion 320 and the second bending portion 330, that is, the second cross beam 420 is located at the front end of the second bending portion 330, so as to avoid the second cross beam 420 affecting the guiding effect of the second bending portion 330 on the bending; at the same time, the second reinforcing plate 430 is aligned with the first bending portion 320, so that the first bending portion 320 is located between the first cross beam 410 and the second cross beam 420, so as to avoid the first cross beam 410 and the second cross beam 420 affecting the guiding effect of the first bending portion 320 on the bending; in this way, in actual use, the energy transfer efficiency between the two front longitudinal beams 300 can be improved by more than 10%, thereby improving the collision safety of the vehicle.

[0052] like Figure 7 As shown, in one embodiment, a through hole is provided on the second reinforcing plate 430, that is, the second reinforcing plate 430 forms a "U"-shaped structure, thereby reducing the weight while ensuring the structural strength.

[0053] like Figure 1 and Figure 8As shown, in one embodiment, the lower vehicle body structure further includes a mounting bracket 500 and an upper longitudinal beam 600; one end of the mounting bracket 500 is connected to the front longitudinal beam 300 and the second mounting plate 310, and the other end of the mounting bracket 500 is connected to the upper longitudinal beam 600. It can be understood that the upper longitudinal beam 600 extends substantially along the length direction of the vehicle body. The height of the upper longitudinal beam 600 is higher than the height of the front longitudinal beam 300 and intersects with the front longitudinal beam 300 in space. The mounting bracket 500 is connected between the upper longitudinal beam 600 and the front longitudinal beam 300, thereby forming a support for the front longitudinal beam 300, and the collision energy can be mutually transmitted between the upper longitudinal beam 600 and the front longitudinal beam 300. The mounting bracket 500 can be welded together by a plurality of metal plates, thereby reducing the weight while ensuring the structural strength. The connection method between the mounting bracket 500 and the upper longitudinal beam 600 includes, but is not limited to, one or more of welding or bolt connection, as long as a stable connection can be formed between the mounting bracket 500 and the upper longitudinal beam 600. There are two front longitudinal beams 300, so the number of the mounting bracket 500 and the number of the upper longitudinal beam 600 are also two. The lower vehicle body structure also includes a front frame installed between the two front longitudinal beams 300. The front frame can be used to install components such as a front bumper and headlights. The connection method between the front frame and the mounting bracket 500 includes, but is not limited to, one or more of bolt connection or welding, as long as a stable connection can be formed between the mounting bracket 500 and the front frame.

[0054] like Figures 8 to 9As shown, in one embodiment, the lower vehicle body structure further includes a front wheel housing plate 700 and a wheel housing reinforcement plate 710 mounted on the front wheel housing plate 700; the wheel housing reinforcement plate 710 is connected between the upper longitudinal beam 600 and the front longitudinal beam 300; a protrusion 711 is provided on the wheel housing reinforcement plate 710, and an energy absorbing cavity is formed between the protrusion 711 and the front wheel housing plate 700. It can be understood that the wheel housing reinforcement plate 710 is connected between the upper longitudinal beam 600 and the front longitudinal beam 300, and in the length direction of the vehicle body, the wheel housing reinforcement plate 710 is located on the side close to the rear side of the vehicle body relative to the mounting bracket 500. The wheel housing reinforcement plate 710 can transfer collision energy between the upper longitudinal beam 600 and the front longitudinal beam 300; and the wheel housing reinforcement plate 710 cooperates with the combined beam frame 400 to transfer collision energy between the two front longitudinal beams 300, reducing the possibility of connection failure between the front wheel housing plate 700 and the front longitudinal beam 300. The connection method between the wheel housing reinforcement plate 710 and the upper longitudinal beam 600 and the front longitudinal beam 300 includes but is not limited to welding or bolting, etc., as long as a stable connection is formed between the wheel housing reinforcement plate 710 and the upper longitudinal beam 600 and the front longitudinal beam 300. The shape of the energy absorption cavity can be set according to actual conditions. In one embodiment, the shape of the energy absorption cavity is roughly a combination of a trapezoid and a triangle, so that in a frontal collision, the energy absorption efficiency of the lower body structure can be improved by 5% to 8%.

[0055] like Figure 1 As shown, in one embodiment, the lower vehicle body structure further includes an A-pillar assembly 800 and a front longitudinal beam connecting plate 900 connected to the A-pillar assembly 800; one end of the front longitudinal beam connecting plate 900 away from the A-pillar assembly 800 is connected to one end of the front longitudinal beam 300 away from the mounting bracket 500; the A-pillar assembly 800 is connected to the upper longitudinal beam 600. It can be understood that the number of the A-pillar assemblies 800 is two. Generally speaking, the spacing between the two A-pillar assemblies 800 is greater than the spacing between the two front longitudinal beams 300, so the front longitudinal beam 300 is connected to the A-pillar assembly 800 through the front longitudinal beam connecting plate 900.

[0056] like Fig.10As shown, in one embodiment, the A-pillar assembly 800 includes an A-pillar inner plate 810 and an A-pillar outer plate 820 connected to each other; the connecting line 830 between the A-pillar outer plate 820 and the A-pillar inner plate 810 is arranged obliquely; in the length direction of the front anti-collision beam assembly 200, the distance between the connecting line 830 and the horizontal plane gradually increases from the edge of the front anti-collision beam assembly 200 toward the center. It can be understood that in a small offset collision, the tire on the collision side will rotate and cause compression to the A-pillar assembly 800. The setting of the connecting line 830 can improve the structural strength of the A-pillar assembly 800 in the tire compression area, thereby avoiding the risk of collapse of the A-pillar assembly 800. The components in the lower body structure (such as the front longitudinal beam connecting plate 900, etc.) are generally connected to the bottom of the A-pillar inner panel 810 near the inner side of the cabin. In this embodiment, the connecting line 830 is inclined so that the bottom end area of ​​the A-pillar inner panel 810 is larger than the bottom end area of ​​the A-pillar outer panel 820, thereby increasing the installable area of ​​the A-pillar inner panel 810 and improving the utilization rate of the A-pillar assembly 800. The connection method between the A-pillar inner panel 810 and the A-pillar outer panel 820 includes, but is not limited to, one or more of welding or bolt connection, as long as a stable connection can be formed between the A-pillar inner panel 810 and the A-pillar outer panel 820.

[0057] like Fig.11 As shown, in one embodiment, the lower body structure further includes a third reinforcing plate 1000; the third reinforcing plate 1000 is connected between the A-pillar assembly 800, the front longitudinal beam connecting plate 900 and the front longitudinal beam 300. It can be understood that the third reinforcing plate 1000 extends along the width direction of the vehicle body. The third reinforcing plate 1000 can strengthen the connection strength between the A-pillar assembly 800, the front longitudinal beam connecting plate 900 and the front longitudinal beam 300.

[0058] like Figure 1 and Fig.11As shown, in one embodiment, the lower body structure further includes a dash panel 1100, a dash reinforcement plate 1110 and a reinforcement beam 1120; the dash reinforcement plate 1110 and the reinforcement beam 1120 are both mounted on the dash panel 1100, the dash reinforcement plate 1110 is connected to the third reinforcement plate 1000; the reinforcement beam 1120 is connected to the A-pillar assembly 800. It can be understood that the dash panel 1100 is used to isolate the engine compartment and the passenger compartment of the vehicle. The reinforcement beam 1120 is connected between the two A-pillar assemblies 800, and while supporting the dash panel 1100, it increases the lateral structural strength of the vehicle body. The dash reinforcement plate 1110 is connected to the third reinforcement plate 1000, so that the dash reinforcement plate 1110 is supported by the third reinforcement plate 1000. The connection method between the third reinforcement plate 1000 and the A-pillar assembly 800, the front longitudinal beam connecting plate 900, the front longitudinal beam 300 and the front wall reinforcement plate 1110 includes but is not limited to one or more of welding or bolt connection, as long as a stable connection can be formed between the third reinforcement plate 1000 and the A-pillar assembly 800, the front longitudinal beam connecting plate 900, the front longitudinal beam 300 and the front wall reinforcement plate 1110.

[0059] like Figure 1 and Fig.12 As shown, in one embodiment, the lower vehicle body structure further includes a floor 1200 and a central channel plate 1210 mounted on the floor 1200; the central channel plate 1210 is connected to the front wall reinforcement plate 1110. It can be understood that the central channel plate 1210 extends along the length direction of the vehicle body. The connection method between the central channel plate 1210 and the front wall reinforcement plate 1110 includes but is not limited to one or more of welding or bolt connection, as long as a stable connection can be formed between the central channel plate 1210 and the front wall reinforcement plate 1110.

[0060] like Fig.12As shown, in one embodiment, the lower vehicle body structure further includes a door sill 1300, a fourth reinforcement plate 1400, a center channel reinforcement plate 1500, a front floor cross beam 1600 and at least one seat cross beam 1700; the center channel reinforcement plate 1500 is connected to one end of the center channel plate 1210 away from the front enclosure reinforcement plate 1110; the front floor cross beam 1600 and the seat cross beam 1700 are both connected to the center channel reinforcement plate 1500 and the door sill 1300; the fourth reinforcement plate 1400 is mounted on the front floor cross beam 1600, and the opposite ends of the fourth reinforcement plate 1400 are respectively connected to the third reinforcement plate 1000 and the seat cross beam 1700. It can be understood that the middle channel reinforcement plate 1500 extends roughly along the length direction of the vehicle body, and together with the middle channel plate 1210, forms a support in the length direction of the vehicle body, so that the vehicle body can be supported in the length direction of the vehicle body without the need for a floor longitudinal beam (i.e., a support beam for the length direction of the vehicle body), thereby reducing the weight of the vehicle by 6kg to 8kg, and since no floor longitudinal beam is provided, the occupation of the lateral space under the floor is reduced, and the layout space of the battery pack can be increased. The middle channel plate 1210, the middle channel reinforcement plate 1500, the front floor cross beam 1600, the seat cross beam 1700, and the fourth reinforcement plate 1400 together constitute a force transmission beam frame, thereby dispersing the collision energy transmitted from the front longitudinal beam 300 to various components to avoid the collision force being concentrated on a certain component. The connection method between the central channel reinforcement plate 1500 and the front floor cross beam 1600 and the seat cross beam 1700 includes but is not limited to one or more of welding or bolt connection, as long as a stable connection can be formed between the central channel reinforcement plate 1500 and the front floor cross beam 1600 and the seat cross beam 1700.

[0061] An embodiment of the present invention further provides a vehicle, comprising the lower vehicle body structure. The specific structure of the lower vehicle body structure can refer to the above embodiments, and will not be described in detail here.

[0062] In the vehicle of the above-mentioned embodiment of the utility model, the lower body structure is connected by bolts between the first mounting plate 210 and the second mounting plate 310, thereby strengthening the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300, and when subjected to a small offset collision, the bolt connection position between the front anti-collision beam assembly 200 and the front longitudinal beam 300 is not easy to fail; and by arranging the first reinforcing plate 100 between the second mounting plate 310 and the front longitudinal beam 300, the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300 is further strengthened, and at the same time, the longitudinal support strength of the front anti-collision beam assembly 200 is increased, thereby improving the collision safety of the vehicle.

[0063] The above are merely embodiments of the lower body structure and vehicle of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lower vehicle body structure, characterized in that: It includes a front anti-collision beam assembly, a front longitudinal beam and a first reinforcement plate; a first mounting plate is provided on the front anti-collision beam assembly; a second mounting plate is provided on the front longitudinal beam at a position opposite to the first mounting plate; the first mounting plate is bolted to the second mounting plate; the first reinforcement plate is connected between the end surface of the second mounting plate facing away from the first mounting plate and the outer side wall of the front longitudinal beam.

2. The lower vehicle body structure according to claim 1, characterized in that: At least one longitudinal reinforcing rib is disposed on the first reinforcing plate.

3. The lower vehicle body structure according to claim 1, characterized in that: The front anti-collision beam assembly includes a front anti-collision beam and an energy absorption box connected between the front anti-collision beam and the first mounting plate, the energy absorption box includes a box body having a collapse space, and at least one inner rib plate extending longitudinally and arranged in the collapse space; The inner rib plate is perpendicular to the first mounting plate; and the box body is provided with at least one collapse inducing rib.

4. The lower vehicle body structure according to claim 3, characterized in that: The front anti-collision beam comprises a beam body provided with an energy absorbing space, and a first reinforcing rib and a second reinforcing rib installed in the energy absorbing space along the length direction of the beam body; the first reinforcing rib and the second reinforcing rib are arranged at intervals; On a cross section perpendicular to the length direction of the beam body, the first reinforcing rib is arched in a direction away from the second reinforcing rib; and the second reinforcing rib is arched in a direction away from the first reinforcing rib.

5. The lower vehicle body structure according to claim 4, characterized in that: Two corner cuts are symmetrically arranged at both ends of the beam body, and the corner cuts include a right-angled side arranged at the end of the beam body, and a front beveled side connected between the right-angled side and the front end face of the beam body; one end of the right-angled side away from the front beveled side is connected to the rear end face of the beam body, and the right-angled side is approximately perpendicular to the rear end face of the beam body.

6. The lower vehicle body structure according to claim 1, characterized in that: The lower vehicle body structure comprises two parallel front longitudinal beams, and two first mounting plates are symmetrically arranged on the front anti-collision beam assembly; the two first mounting plates are respectively bolted to the second mounting plates on the two front longitudinal beams; The lower vehicle body structure also includes a combined beam frame connected between the two front longitudinal beams; the combined beam frame includes a first cross beam, a second cross beam, and a second reinforcing plate connected between the first cross beam and the second cross beam; both ends of the first cross beam and the second cross beam are respectively connected to the two front longitudinal beams.

7. The lower vehicle body structure according to claim 6, characterized in that: The front longitudinal beam is provided with a first bending portion and a second bending portion; the second cross beam is provided between the first bending portion and the second bending portion, and the second reinforcing plate is aligned with the first bending portion.

8. The lower vehicle body structure according to claim 1, characterized in that: The lower vehicle body structure further includes a mounting bracket and an upper longitudinal beam; one end of the mounting bracket is connected to the front longitudinal beam and the second mounting plate, and the other end of the mounting bracket is connected to the upper longitudinal beam.

9. The lower vehicle body structure according to claim 8, characterized in that: The lower vehicle body structure also includes a front wheel cover plate and a wheel cover reinforcement plate installed on the front wheel cover plate; the wheel cover reinforcement plate is connected between the upper longitudinal beam and the front longitudinal beam; a protrusion is provided on the wheel cover reinforcement plate, and an energy absorption cavity is formed between the protrusion and the front wheel cover plate.

10. The lower vehicle body structure according to claim 8, characterized in that: The lower vehicle body structure also includes an A-pillar assembly and a front longitudinal beam connecting plate connected to the A-pillar assembly; an end of the front longitudinal beam connecting plate away from the A-pillar assembly is connected to an end of the front longitudinal beam away from the mounting bracket; the A-pillar assembly is connected to the upper longitudinal beam.

11. The lower vehicle body structure according to claim 10, characterized in that: The A-pillar assembly includes an A-pillar inner panel and an A-pillar outer panel connected to each other; the connection line between the A-pillar outer panel and the A-pillar inner panel is arranged obliquely; In the length direction of the front anti-collision beam assembly, the distance between the connecting line and the horizontal plane gradually increases from the edge of the front anti-collision beam assembly toward the center.

12. The lower vehicle body structure according to claim 10, characterized in that: The lower body structure also includes a third reinforcement plate, which is connected between the A-pillar assembly, the front longitudinal beam connecting plate and the front longitudinal beam; the lower body structure also includes a front panel, a front panel reinforcement plate and a reinforcement cross beam, the front panel reinforcement plate and the reinforcement cross beam are both installed on the front panel, the front panel reinforcement plate is connected to the third reinforcement plate, and the reinforcement cross beam is connected to the A-pillar assembly.

13. The lower vehicle body structure according to claim 12, characterized in that: The lower vehicle body structure also includes a floor and a center channel plate installed on the floor; the center channel plate is connected to the front wall reinforcement plate.

14. The lower vehicle body structure according to claim 13, characterized in that: The lower body structure also includes a rocker, a fourth reinforcement plate, a center channel reinforcement plate, a front floor cross member and at least one seat cross member; The middle channel reinforcement plate is connected to one end of the middle channel plate away from the front wall reinforcement plate; the front floor crossbeam and the seat crossbeam are both connected to the middle channel reinforcement plate and the door sill; the fourth reinforcement plate is installed on the front floor crossbeam, and the opposite ends of the fourth reinforcement plate are respectively connected to the third reinforcement plate and the seat crossbeam.

15. A vehicle, characterized in that: It comprises the lower vehicle body structure as claimed in any one of claims 1 to 14.

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