Lower vehicle body structure and vehicle

Abstract

The present application provides a lower vehicle body structure and a vehicle. The lower vehicle body structure comprises first reinforcing plates, a front bumper beam assembly, and front longitudinal beams; first mounting plates are provided on the front bumper beam assembly; second mounting plates are provided on the front longitudinal beams at the positions corresponding to the first mounting plates; the first mounting plates are connected to the second mounting plates by means of bolts; and the first reinforcing plates are connected between the end surfaces of the second mounting plates facing away from the first mounting plates and the outer side walls of the front longitudinal beams. The present application improves the collision safety of a vehicle.

Description

Lower body structure and vehicle

[0001] The present application claims priority to the Chinese Patent Application No. 202410963708.0, filed on July 17, 2024, entitled "Lower body structure and vehicle", and the Chinese Patent Application No. 202421701796.9, filed on July 17, 2024, entitled "Lower body structure and vehicle", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of vehicles, in particular relates to a lower body structure and a vehicle. BACKGROUND

[0003] When a vehicle is subjected to a front small offset collision, the lower body structure elements on the collision side of the vehicle are subjected to a large collision force, and the inventors have realized that this easily leads to the connection of the welding position between the front crash beam assembly and the front longitudinal beam on the collision side being invalid, thereby easily causing a large intrusion of the passenger compartment, endangering the safety of the passengers, and reducing the collision safety of the vehicle.

[0004] SUMMARY

[0005] The present application provides a lower body structure and a vehicle to solve the technical problem of low collision safety of the lower body structure in the prior art when subjected to a small offset collision.

[0006] In view of the above technical problems, the embodiments of the present application provide a lower body structure, comprising a front crash beam assembly, a front longitudinal beam, and a first reinforcing plate; a first mounting plate is arranged on the front crash beam assembly; a second mounting plate is arranged on the front longitudinal beam at a position opposite to the first mounting plate; the first mounting plate and the second mounting plate are bolted; and 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.

[0007] A vehicle comprising the lower body structure.

[0008] The lower body structure provided by the application comprises a front collision beam assembly, a front longitudinal beam and a first reinforcing plate; the front collision beam assembly is provided with a first mounting plate; the front longitudinal beam is provided with a second mounting plate at a position opposite to the first mounting plate; the first mounting plate is bolted to the second mounting plate; and the first reinforcing plate is connected between an end surface of the second mounting plate away from the first mounting plate and an outer side wall of the front longitudinal beam. In the application, the bolted connection between the first mounting plate and the second mounting plate strengthens the connection strength between the front collision beam assembly and the front longitudinal beam, and the bolted connection position between the front collision beam assembly and the front longitudinal beam is not prone to failure when subjected to a small offset collision; and the first reinforcing plate arranged between the second mounting plate and the front longitudinal beam further strengthens the connection strength between the front collision beam assembly and the front longitudinal beam, and increases the longitudinal support strength of the front collision beam assembly, thereby improving the collision safety of the vehicle.

[0009] The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features and advantages of the application will become apparent from the description, the drawings, and the claims. BRIEF DESCRIPTION OF DRAWINGS

[0010] The application will be further described below with reference to the drawings and embodiments.

[0011] Fig. 1 is a structural schematic view of a lower body structure provided by an embodiment of the application.

[0012] Fig. 2 is a partial structural schematic view of a lower body structure provided by an embodiment of the application.

[0013] Fig. 3 is a structural schematic view of an energy absorption box of a lower body structure provided by an embodiment of the application.

[0014] Fig. 4 is a partial structural schematic view of a lower body structure provided by another embodiment of the application.

[0015] Fig. 5 is a partial structural schematic view of a lower body structure provided by another embodiment of the application.

[0016] Fig. 6 is a partial structural schematic view of a lower body structure provided by another embodiment of the application.

[0017] Fig. 7 is a structural schematic view of a combined beam frame of a lower body structure provided by another embodiment of the application.

[0018] Fig. 8 is a partial structural schematic view of a lower body structure provided by another embodiment of the application.

[0019] Fig. 9 is a partial structural schematic view of a lower body structure provided by another embodiment of the application.

[0020] Fig. 10 is a schematic view of a partial structure of an A-pillar assembly of a lower body structure according to another embodiment of the present application.

[0021] Fig. 11 is a schematic view of a partial structure of a lower body structure according to another embodiment of the present application.

[0022] Fig. 12 is a schematic view of a partial structure of a lower body structure according to another embodiment of the present application.

[0023] The reference signs in the description are as follows: 100, first reinforcement plate; 110, longitudinal reinforcement rib; 200, front bumper beam assembly; 210, first mounting plate; 220, front bumper beam; 221, beam body; 2211, cut corner portion; 22111, right angle edge; 22112, front side bevel; 222, first reinforcement rib; 223, second reinforcement rib; 230, energy absorption box; 231, box body; 2311, collapse inducing rib; 232, inner rib plate; 300, front longitudinal beam; 310, second mounting plate; 320, first bending portion; 330, second bending portion; 400, combined beam frame; 410, first cross beam; 420, second cross beam; 430, second reinforcement plate; 500, mounting bracket; 600, upper longitudinal beam; 700, front wheel cover plate; 710, wheel cover reinforcement plate; 711, protruding portion; 800, A-pillar assembly; 810, A-pillar inner plate; 820, A-pillar outer plate; 830, connecting line; 900, front longitudinal beam connecting plate; 1000, third reinforcement plate; 1100, front wall plate; 1110, front wall reinforcement plate; 1120, reinforcement cross beam; 1200, floor; 1210, middle channel plate; 300, rocker; 1400, fourth reinforcement plate; 1500, middle channel reinforcement plate; 1600, front floor cross beam; 1700, seat cross beam. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0025] It should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In the present application, in order to better show the structure of the lower body structure and the connection relationship thereof, "front" in the present application refers to the upper side in FIG. 6 (i.e., the front side when the vehicle is normally running); "rear" in the present application refers to the lower side in FIG. 6 (i.e., the rear side when the vehicle is normally running); "upper" in the present application refers to the side toward the roof when the vehicle is normally running; "lower" in the present application refers to the side toward the bottom when the vehicle is normally running; "left" in the present application refers to the left side of the lower body structure in FIG. 6 (i.e., the left side when the vehicle is normally running); "right" in the present application refers to the right side of the lower body structure in FIG. 6 (i.e., the right side when the vehicle is normally running). "Longitudinal" in the present application refers to the length direction of the vehicle body; "transverse" in the present application refers to the width direction of the vehicle body; and "vertical" in the present application refers to the height direction of the vehicle body.

[0027] As shown in FIGS. 1 to 12, an embodiment of the present application provides a lower body structure, comprising a front impact beam assembly 200, a front longitudinal beam 300, and a first reinforcing plate 100; the front impact beam assembly 200 is provided with a first mounting plate 210; the front longitudinal beam 300 is provided with a second mounting plate 310 at a position opposite to the first mounting plate 210; the first mounting plate 210 and the second mounting plate 310 are bolted; and the first reinforcing plate 100 is connected between the end face of the second mounting plate 310 away from the first mounting plate 210 and the outer side wall of the front longitudinal beam 300.

[0028] In the present 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, etc. The front impact beam assembly 200 extends along 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 impact beam assembly 200. The front longitudinal beam 300 extends along the length direction of the vehicle body. The number of the front longitudinal beams 300 can be two, and each of the two front longitudinal beams 300 is provided with the second mounting plate 310 at one end thereof toward the front impact beam assembly 200. The first mounting plates 210 on the two front impact beam assemblies 200 are respectively bolted with the second mounting plates 310 on the two front longitudinal beams 300, so that the front impact beam assembly 200 is supported on the front side of the vehicle body by the two front longitudinal beams 300. When the vehicle is involved in a collision accident, the front impact beam assembly 200 can bear and absorb the collision energy on the front side (including the front or the side front, etc.) of the vehicle body, and then disperse and transmit the collision energy that cannot be absorbed to the two front longitudinal beams 300, so that the front longitudinal beams 300 further absorb the collision energy.

[0029] In the transmission of the above-mentioned collision energy, the bolt connection between the first mounting plate 210 and the second mounting plate 310 can strengthen the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300, and avoid the connection failure between the front anti-collision beam assembly 200 and the front longitudinal beam 300. The first reinforcing plate 100 is connected between the end face 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 one end of the first reinforcing plate 100 away from the outer side wall of the front longitudinal beam 300 is connected to the first mounting plate 210 through the second mounting plate 310, and then 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, further strengthening the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300, and increasing the longitudinal support strength of the front anti-collision beam assembly 200, further avoiding the connection failure between the front anti-collision beam assembly 200 and the front longitudinal beam 300 when the vehicle is subjected to a small offset collision.

[0030] 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 bolted to the second mounting plate 310 and the first mounting plate 210 together. The connection mode of the rear end of the first reinforcing plate 100 away from the second mounting plate 310 and the outer side wall of the front longitudinal beam 300 can also be 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 the connection failure between the first reinforcing plate 100 and the front longitudinal beam 300.

[0031] In the above-mentioned embodiments of the present application, the bolt connection between the first mounting plate 210 and the second mounting plate 310 strengthens the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300, 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 the first reinforcing plate 100 arranged between the second mounting plate 310 and the front longitudinal beam 300 further strengthens the connection strength between the front anti-collision beam assembly 200 and the front longitudinal beam 300, and increases the longitudinal support strength of the front anti-collision beam assembly 200, thereby improving the collision safety of the vehicle.

[0032] As shown in FIG. 2, in an embodiment, the first reinforcing plate 100 is provided with at least one longitudinal reinforcing rib 110. It can be understood that the longitudinal reinforcing rib 110 is protruded on the first reinforcing plate 100 along the length direction of the vehicle body, so as to reinforce the longitudinal structural strength of the first reinforcing plate 100. The longitudinal reinforcing rib 110 can be in direct contact with the second mounting plate 310 and the side wall of the front longitudinal beam 300, so as to be in abutment between the second mounting plate 310 and the side wall of the front longitudinal beam 300 when the front crash beam assembly 200 and the front longitudinal beam 300 just have relative deformation; or the longitudinal reinforcing rib 110 can not be in direct contact with the second mounting plate 310 and the side wall of the front longitudinal beam 300, and is in abutment between the second mounting plate 310 and the side wall of the front longitudinal beam 300 after the front crash beam assembly 200 and the front longitudinal beam 300 have certain relative deformation. The number of the longitudinal reinforcing rib 110 can be set according to actual conditions, as long as the longitudinal structural strength of the first reinforcing plate 100 can be reinforced.

[0033] As shown in FIG. 2, in an embodiment, the front crash beam assembly 200 comprises a front crash beam 220 and an energy absorption box 230 connected between the front crash beam 220 and the first mounting plate 210. It can be understood that the front crash beam 220 and the energy absorption box 230 can be aluminum extrusion molded parts. The front crash beam 220 can be arched towards the front side of the vehicle body, and the first mounting plate 210 is substantially perpendicular to the length direction of the vehicle body, so the projection of the energy absorption box 230 on the horizontal plane is substantially trapezoidal. The energy absorption box 230 is connected with the first mounting plate 210 and the second mounting plate 310, so the energy absorption box 230 is arranged at the front end of the first reinforcing plate 100 away from the outer side wall of the front longitudinal beam 300. The projection of the rear end of the energy absorption box 230 away from the front crash beam 220 on the length direction of the vehicle body at least partially overlaps with the projections of the front longitudinal beam 300 and the first reinforcing plate 100 on the length direction of the vehicle body. That is, after the collision energy of the front crash beam 220 is transmitted to the energy absorption box 230, the end of the energy absorption box 230 away from the front crash beam 220 is supported by the front longitudinal beam 300 or / and the first reinforcing plate 100, so that the collision energy can be more uniformly applied to the energy absorption box 230, and the energy absorption box 230 can be stably crushed during the collision process, thereby improving the crushing performance of the energy absorption box 230.

[0034] As shown in FIG. 3, in an embodiment, the energy absorption box 230 comprises a box body 231 with a collapsing space, and at least one inner rib plate 232 arranged in the collapsing space in the longitudinal direction; the inner rib plate 232 is perpendicular to the first mounting plate 210; the box body 231 is provided with at least one collapsing inducing rib 2311. It can be understood that the collapsing inducing rib 2311 is arranged on the box body 231 in the transverse or vertical direction, which is substantially perpendicular to the length direction of the inner rib plate 232, so that the box body 231 can be induced to collapse stably in the length direction of the vehicle body when the collision energy transmitted in the length direction of the vehicle body is received. The inner rib plate 232 is perpendicular to the first mounting plate 210, so that when a front collision is received, the collapsing inducing rib 2311 can induce the box body 231 to collapse 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 absorption box 230 can absorb more collision energy.

[0035] As shown in FIGS. 3-4, in an embodiment, the inner rib plate 232 is arranged in the collapsing space in 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 collapsing space into an outer sub-space and an inner sub-space. The transverse width ratio of the outer sub-space and the inner sub-space in the width direction of the vehicle body is 5:4. The transverse width of the outer sub-space is greater than that of the inner sub-space. In a further embodiment, the collapsing inducing rib 2311 comprises two first inducing ribs uniformly arranged on the outer side wall of the box body 231 corresponding to the outer sub-space, which can longitudinally divide the outer side wall of the box body 231 corresponding to the outer sub-space into three sections. The collapsing inducing rib 2311 further comprises two second inducing ribs arranged in the inner sub-space; wherein the rear second inducing rib is aligned with the rear first inducing rib, and the front second inducing rib is arranged at 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 at 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 sequentially and stably collapse when a collision from the front side of the vehicle body is received, and the energy absorption capacity of the energy absorption box 230 can be improved by 6%.

[0036] As shown in FIGS. 4-5, in an 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 is arranged spaced apart from the second reinforcing rib 223; in a cross section perpendicular to the length direction of the beam body 221, the first reinforcing rib 222 is arched towards a direction away from the second reinforcing rib 223; and the second reinforcing rib 223 is arched towards 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 uniformly spaced apart in the energy absorption space, and when the front anti-collision beam 220 is subjected to a collision, by arranging the first reinforcing rib 222 and the second reinforcing rib 223, the force of the collision can be more evenly borne. And the collapse is more stable and controllable, thereby improving the energy absorption capacity of the front anti-collision beam 220.

[0037] As shown in FIG. 5, in an embodiment, two cut corner portions 2211 are symmetrically arranged at both ends of the beam body 221, the cut corner portion 2211 includes a right angle edge 22111 arranged at the end of the beam body 221, and a front side bevel 22112 connected between the right angle edge 22111 and the front end face of the beam body 221; one end of the right angle edge 22111 away from the front side bevel 22112 is connected to the rear end face of the beam body 221, and the right angle edge 22111 is substantially perpendicular to the rear end face of the beam body 221. It can be understood that by symmetrically arranging two cut corner portions 2211 at both ends of the beam body 221, the beam body 221 can effectively collapse and deform. The shape of the cut corner portion 2211 can be specifically arranged according to actual conditions. In an embodiment, the included angle between the front side bevel 22112 and the rear end face of the beam body 221 is 30 degrees, and the length of the right angle edge 22111 is 8 mm; the arching 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%.

[0038] As shown in FIG. 1 and FIG. 6, in an embodiment, the lower vehicle body structure includes two front longitudinal beams 300 arranged in parallel, and two first mounting plates 210 symmetrically arranged on the front anti-collision beam assembly 200; the two first mounting plates 210 are bolted to the second mounting plates 310 on the two front longitudinal beams 300, respectively; the lower vehicle body structure further includes a combined beam frame 400 connected between the two front longitudinal beams 300; the combined 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 connected to the two front longitudinal beams 300, respectively. It can be understood that both ends of the first cross beam 410 and the second cross beam 420 are connected to the two front longitudinal beams 300, respectively, thereby forming a stable quadrilateral structure, and the second reinforcing plate 430 can strengthen the structural strength of the quadrilateral structure. The impact force in the length direction of the vehicle body on one end of the first cross beam 410 can be transmitted to the other end of the first cross beam 410 and the second cross beam 420. Therefore, the combined beam frame 400 is installed between the two front longitudinal beams 300, can form a support between the two front longitudinal beams 300, and can transmit the impact energy on one of the front longitudinal beams 300 to the other front longitudinal beam 300, thereby dispersing the impact energy, avoiding the front longitudinal beam 300 on the impact side from intruding into the passenger compartment and causing harm to the passengers when small offset collision occurs, and improving the collision safety of the vehicle.

[0039] As shown in Figures 6 and 7, in one embodiment, the front longitudinal beam 300 is provided with a first bend 320 and a second bend 330; the second crossbeam 420 is disposed between the first bend 320 and the second bend 330, and the second reinforcing plate 430 is aligned with the first bend 320. It can be understood that the first bend 320 or the second bend 330 may include, but is not limited to, one or more of a guide groove or a clearance 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 bumper beam assembly 200 is impacted, and thus reducing the injury to the occupant. After the front longitudinal beam 300 is impacted, the impact force is first transmitted to the position of the front longitudinal beam 300 corresponding to the first bend 320, and then the first bending and collapse occurs at the position to absorb energy. Afterwards, the impact force continues to be transmitted to the position corresponding to the second bend 330 of the front longitudinal beam 300, and the second bending and collapse occurs at the position to absorb energy, thereby improving the energy absorption effect of the front longitudinal beam 300. Understandably, the second crossbeam 420 is positioned between the first bend 320 and the second bend 330, that is, the second crossbeam 420 is located at the front end of the second bend 330, to prevent the second crossbeam 420 from affecting the guiding effect of the position of the second bend 330 on the bend; at the same time, the second reinforcing plate 430 is aligned with the first bend 320, so that the first bend 320 is located between the first crossbeam 410 and the second crossbeam 420, to prevent the first crossbeam 410 and the second crossbeam 420 from affecting the guiding effect of the position of the first bend 320 on the bend; thus, 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.

[0040] As shown in Figure 7, in one embodiment, the second reinforcing plate 430 is provided with through holes, that is, the second reinforcing plate 430 forms a "U" shaped structure, thereby reducing weight while ensuring structural strength.

[0041] As shown in FIG. 1 and FIG. 8, in an embodiment, the lower body structure further comprises mounting brackets 500 and upper longitudinal beams 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 in the direction of the length of the vehicle body. The height of the upper longitudinal beam 600 is higher than that of the front longitudinal beam 300 and spatially intersects with the front longitudinal beam 300. The mounting bracket 500 is connected between the upper longitudinal beam 600 and the front longitudinal beam 300, thereby supporting the front longitudinal beam 300, and the collision energy can be transmitted between the upper longitudinal beam 600 and the front longitudinal beam 300. The mounting bracket 500 can be integrally welded by a plurality of metal plates, thereby reducing the weight while ensuring the structural strength. The connection mode of 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. The front longitudinal beam 300 is two, therefore, the number of the mounting bracket 500 and the upper longitudinal beam 600 is also two. The lower body structure further comprises a front end frame mounted between the two front longitudinal beams 300. The front end frame can be used to mount elements such as front bumpers and headlights. The connection mode of the front end 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 end frame.

[0042] As shown in FIGS. 8-9, in an embodiment, the lower body structure further comprises a front wheelhouse panel 700 and a wheelhouse reinforcement panel 710 mounted on the front wheelhouse panel 700; the wheelhouse reinforcement panel 710 is connected between the upper longitudinal beam 600 and the front longitudinal beam 300; the wheelhouse reinforcement panel 710 is provided with a protrusion 711, and an energy absorption cavity is formed between the protrusion 711 and the front wheelhouse panel 700. Understandably, the wheelhouse reinforcement panel 710 is connected between the upper longitudinal beam 600 and the front longitudinal beam 300, and in the length direction of the body, the wheelhouse reinforcement panel 710 is located on the side close to the rear side of the body relative to the mounting bracket 500. The wheelhouse reinforcement panel 710 can transmit collision energy between the upper longitudinal beam 600 and the front longitudinal beam 300; and the wheelhouse reinforcement panel 710 cooperates with the combined beam bracket 400 to transmit collision energy between the two front longitudinal beams 300, reducing the possibility of connection failure between the front wheelhouse panel 700 and the front longitudinal beam 300. The connection mode of the wheelhouse reinforcement panel 710 and the upper longitudinal beam 600 and the front longitudinal beam 300 includes but is not limited to welding or bolt connection, etc., as long as a stable connection is formed between the wheelhouse reinforcement panel 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 an embodiment, the shape of the energy absorption cavity is approximately a combined shape of a trapezoidal shape and a triangular shape, so that in a frontal collision, the energy absorption efficiency of the lower body structure can be improved by 5% to 8%.

[0043] As shown in FIG. 1, in an embodiment, the lower body structure further comprises an A-pillar assembly 800 and a front longitudinal beam connecting plate 900 connecting 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; and the A-pillar assembly 800 connects the upper longitudinal beam 600. Understandably, the number of A-pillar assemblies 800 is two. Generally, the distance between the two A-pillar assemblies 800 is greater than the distance between the two front longitudinal beams 300, so the front longitudinal beams 300 are connected to the A-pillar assemblies 800 through the front longitudinal beam connecting plate 900.

[0044] As shown in FIG. 10, in an embodiment, the A-pillar assembly 800 includes an A-pillar inner panel 810 and an A-pillar outer panel 820 connected to each other; a connection line 830 between the A-pillar outer panel 820 and the A-pillar inner panel 810 is arranged obliquely; and the distance between the connection line 830 and the horizontal plane gradually increases from the edge of the front crash beam assembly 200 towards the center in the length direction of the front crash beam assembly 200. It can be understood that in a small offset collision, the tire on the collision side will rotate and cause extrusion to the A-pillar assembly 800. The arrangement of the connection line 830 can improve the structural strength of the A-pillar assembly 800 in the tire extrusion area, thereby avoiding the risk of collapse of the A-pillar assembly 800. The elements in the lower body structure (such as the front side member connecting plate 900, etc.) are generally connected to the bottom of the A-pillar inner panel 810 near the inner side of the engine compartment. In this embodiment, the connection line 830 is arranged obliquely, so that the area of the bottom end of the A-pillar inner panel 810 is larger than that of the A-pillar outer panel 820, thereby increasing the mountable area of the A-pillar inner panel 810 and improving the utilization rate of the A-pillar assembly 800. The connection mode 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, bolt connection, etc., as long as a stable connection can be formed between the A-pillar inner panel 810 and the A-pillar outer panel 820.

[0045] As shown in FIG. 11, in an embodiment, the lower body structure further includes a third reinforcing plate 1000; and the third reinforcing plate 1000 is connected between the A-pillar assembly 800, the front side member connecting plate 900 and the front side member 300. It can be understood that the third reinforcing plate 1000 extends along the body width direction. The third reinforcing plate 1000 can strengthen the connection strength between the A-pillar assembly 800, the front side member connecting plate 900 and the front side member 300.

[0046] As shown in FIG. 1 and FIG. 11, in an embodiment, the lower body structure further comprises a front panel 1100, a front panel reinforcement 1110 and a reinforcement cross beam 1120; the front panel reinforcement 1110 and the reinforcement cross beam 1120 are both mounted on the front panel 1100, the front panel reinforcement 1110 is connected to the third reinforcement panel 1000; the reinforcement cross beam 1120 is connected to the A-pillar assembly 800. It can be understood that the front panel 1100 is used to separate the engine compartment and the passenger compartment of the vehicle. The reinforcement cross beam 1120 is connected between two A-pillar assemblies 800, which supports the front panel 1100 and increases the lateral structural strength of the vehicle body. The front panel reinforcement 1110 is connected to the third reinforcement panel 1000, so that the third reinforcement panel 1000 supports the front panel reinforcement 1110. The connection between the third reinforcement panel 1000 and the A-pillar assembly 800, the front longitudinal beam connecting plate 900, the front longitudinal beam 300 and the front panel reinforcement 1110 includes but is not limited to one or more of welding, bolting and other connection methods, as long as a stable connection between the third reinforcement panel 1000 and the A-pillar assembly 800, the front longitudinal beam connecting plate 900, the front longitudinal beam 300 and the front panel reinforcement 1110 can be formed.

[0047] As shown in FIG. 1 and FIG. 12, in an embodiment, the lower body structure further comprises a floor 1200 and a center tunnel panel 1210 mounted on the floor 1200; the center tunnel panel 1210 is connected to the front panel reinforcement 1110. It can be understood that the center tunnel panel 1210 extends along the length direction of the vehicle body. The connection between the center tunnel panel 1210 and the front panel reinforcement 1110 includes but is not limited to one or more of welding, bolting and other connection methods, as long as a stable connection between the center tunnel panel 1210 and the front panel reinforcement 1110 can be formed.

[0048] As shown in FIG. 12, in an embodiment, the lower body structure further comprises a rocker 1300, a fourth reinforcing plate 1400, a middle tunnel reinforcing plate 1500, a front floor cross beam 1600, and at least one seat cross beam 1700; the middle tunnel reinforcing plate 1500 is connected to an end of the middle tunnel plate 1210 away from the front bulkhead reinforcing plate 1110; the front floor cross beam 1600 and the seat cross beam 1700 are both connected to the middle tunnel reinforcing plate 1500 and the rocker 1300; the fourth reinforcing plate 1400 is installed on the front floor cross beam 1600, and opposite ends of the fourth reinforcing plate 1400 are respectively connected to the third reinforcing plate 1000 and the seat cross beam 1700. It can be understood that the middle tunnel reinforcing plate 1500 extends substantially along the length direction of the vehicle body, and cooperates with the middle tunnel plate 1210 to form support in the length direction of the vehicle body, so that the vehicle body can be supported in the length direction without arranging a floor longitudinal beam (i.e., a support beam in the length direction of the vehicle body), thereby reducing the weight of the vehicle by 6-8 kg, and because the floor longitudinal beam is not arranged, the transverse space below the floor is reduced, and the arrangement space of the battery pack can be increased. The middle tunnel plate 1210, the middle tunnel reinforcing plate 1500, the front floor cross beam 1600, the seat cross beam 1700, and the fourth reinforcing plate 1400 jointly constitute a force transmission beam frame, so that the collision energy transmitted from the front longitudinal beam 300 is dispersed to each element, and the collision force is prevented from being concentrated on a certain element. The connection mode between the middle tunnel reinforcing 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 middle tunnel reinforcing plate 1500 and the front floor cross beam 1600 and the seat cross beam 1700.

[0049] An embodiment of the present application further provides a vehicle comprising the lower body structure. The specific structure of the lower body structure can be referred to the above-mentioned embodiments, which will not be described here again.

[0050] In the vehicle of the above-mentioned embodiments of the present application, the lower body structure is connected between the first mounting plate 210 and the second mounting plate 310 by bolts, so that the connection strength between the front crash beam assembly 200 and the front longitudinal beam 300 is strengthened, and the bolt connection position between the front crash beam assembly 200 and the front longitudinal beam 300 is not easy to fail when subjected to a small offset collision; and the first reinforcing plate 100 is arranged between the second mounting plate 310 and the front longitudinal beam 300, so that the connection strength between the front crash beam assembly 200 and the front longitudinal beam 300 is further strengthened, and the longitudinal support strength of the front crash beam assembly 200 is increased, thereby improving the collision safety of the vehicle.

[0051] The above merely describes the embodiments of the lower vehicle body structure and the vehicle of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lower body structure, wherein, The front anti-collision beam assembly, the front longitudinal beam and the first reinforcing plate are provided.

2. The lower body structure according to claim 1, wherein At least one longitudinal reinforcing rib is arranged on the first reinforcing plate.

3. The lower body structure according to claim 1, wherein The front anti-collision beam assembly comprises a front anti-collision beam and an energy absorption box connected between the front anti-collision beam and the first mounting plate. The inner rib plate is perpendicular to the first mounting plate.

4. The lower body structure according to claim 3, wherein The front anti-collision beam comprises a beam body provided with an energy absorption space and a first reinforcing rib and a second reinforcing rib arranged in the energy absorption space along the length direction of the beam body. In a cross section perpendicular to the length direction of the beam body, the first reinforcing rib is arched away from the second reinforcing rib, and the second reinforcing rib is arched away from the first reinforcing rib.

5. The lower body structure according to claim 4, wherein Two cut corner portions are symmetrically arranged at both ends of the beam body.

6. The lower body structure according to claim 1, wherein The lower vehicle body structure comprises two front longitudinal beams arranged in parallel. The lower vehicle body structure further comprises a combined beam frame connected between the two front longitudinal beams.

7. The lower body structure according to claim 6, wherein The front longitudinal beam is provided with a first bending portion and a second bending portion.

8. The lower body structure according to claim 1, wherein The lower vehicle body structure further comprises a front wheel cover plate and a wheel cover reinforcing plate arranged on the front wheel cover plate.

9. The lower body structure according to claim 8, wherein The wheel cover reinforcing plate is connected between the upper longitudinal beam and the front longitudinal beam. A protruding portion is arranged on the wheel cover reinforcing plate.

10. The lower body structure according to claim 8, wherein The lower body structure further comprises an A-pillar assembly and a front longitudinal beam connecting plate connecting the A-pillar assembly; an end of the front longitudinal beam connecting plate away from the A-pillar assembly is connected with an end of the front longitudinal beam away from the mounting bracket; the A-pillar assembly is connected with the upper longitudinal beam.

11. The lower body structure according to claim 10, wherein The A-pillar assembly comprises an A-pillar inner panel and an A-pillar outer panel connected with each other; a connecting 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 towards the center.

12. The lower body structure according to claim 10, wherein The lower body structure further comprises a third reinforcing plate connected between the A-pillar assembly, the front longitudinal beam connecting plate and the front longitudinal beam; the lower body structure further comprises a front wall, a front wall reinforcing plate and a reinforcing cross beam, the front wall reinforcing plate and the reinforcing cross beam are both mounted on the front wall, the front wall reinforcing plate is connected with the third reinforcing plate, and the reinforcing cross beam is connected with the A-pillar assembly.

13. The lower body structure according to claim 12, wherein The lower body structure further comprises a floor and a center tunnel plate mounted on the floor; the center tunnel plate is connected with the front wall reinforcing plate.

14. The lower body structure according to claim 13, wherein The lower body structure further comprises a rocker, a fourth reinforcing plate, a center tunnel reinforcing plate, a front floor cross beam and at least one seat cross beam; The center tunnel reinforcing plate is connected with an end of the center tunnel plate away from the front wall reinforcing plate; the front floor cross beam and the seat cross beam are both connected with the center tunnel reinforcing plate and the rocker; the fourth reinforcing plate is mounted on the front floor cross beam, and opposite ends of the fourth reinforcing plate are connected with the third reinforcing plate and the seat cross beam respectively.

15. A vehicle, wherein, The lower body structure comprises the lower body structure according to any one of claims 1 to 14. The lower body structure comprises the lower body structure according to any one of claims 1 to 14.

Images