Vehicle body floor protection structure and automobile

Abstract

This application discloses a vehicle body floor protection structure and a vehicle. The vehicle body floor protection structure includes a rear floor front crossbeam structure (10), a rear floor middle crossbeam structure (20), a rear floor rear crossbeam structure (30), a vehicle body longitudinal beam structure (40), and a side anti-scratch bottom support structure (50). The vehicle body longitudinal beam structure (40) extends longitudinally along the vehicle body. The rear floor front crossbeam structure (10), the rear floor middle crossbeam structure (20), and the rear floor rear crossbeam structure (30) extend laterally along the vehicle body and are respectively fixed to the vehicle body longitudinal beam structure (40). The side anti-scratch bottom support structure (50) extends longitudinally along the vehicle body and is fixed to the vehicle body longitudinal beam structure (40). The vehicle body floor protection structure is fixed below the vehicle body middle floor structure (2). The vehicle body floor protection structure according to this application can improve the protection of the vehicle body floor.

Description

Technical Field

[0001] This application relates to the automotive field, and more specifically, to a vehicle body floor protection structure and a vehicle having such a vehicle body floor protection structure. Background Technology

[0002] With the improvement of living standards, the number of motor vehicles has increased rapidly. At the same time, road traffic accidents and the number of injuries and fatalities in these accidents are also increasing rapidly. Side-impact collisions with vehicle poles are a common type of accident. Additionally, fuel leaks and battery pack fires caused by scraping the undercarriage are also frequent occurrences.

[0003] In October 2019, my country released the national standard "Occupant Protection in Side Pole Collision of Automobiles." Simultaneously, the 2021 version of CNCAP also incorporated the side pole collision test into its evaluation system. This standard sets forth specific requirements for both the test methods and safety evaluation methods for vehicle side pole collisions. In the side pole collision test, the test vehicle impacts a rigid pole at a speed of 32 km / h and a collision angle of 75 degrees. During the collision, excessive vehicle body deformation rapidly reduces the occupant survival space and seriously affects occupant safety. Furthermore, the strength of the vehicle floor crossbeam structure, the B-pillar structure, and the sill beam structure directly determines the amount of intrusion deformation of the vehicle body structure and the space occupied by the battery pack and fuel tank. Therefore, the strength of a rationally designed lateral support structure of the vehicle body is particularly important.

[0004] An excessively weak vehicle floor structure will lead to severe bending and deformation, excessive vehicle deformation, and a sharp reduction in passenger space, seriously affecting passenger safety, as well as the safety performance of the battery pack and the vehicle's fuel tank. In addition, undercarriage scraping is inevitable during vehicle use, and the fuel tank and battery pack located at the bottom of the vehicle need to be protected. Therefore, a reasonable design of the undercarriage anti-scratch structure is particularly important. Utility Model Content

[0005] The main technical problem this application aims to solve is how to improve the protection of the vehicle body floor.

[0006] To address the aforementioned technical problems, this application provides a vehicle floor protection structure, comprising a rear floor front crossbeam structure, a rear floor middle crossbeam structure, a rear floor rear crossbeam structure, a vehicle body longitudinal beam structure, and a side anti-scratch bottom support structure. The vehicle body longitudinal beam structure extends longitudinally along the vehicle body, while the rear floor front crossbeam structure, the rear floor middle crossbeam structure, and the rear floor rear crossbeam structure extend transversely along the vehicle body and are respectively fixed to the vehicle body longitudinal beam structure. The side anti-scratch bottom support structure extends longitudinally along the vehicle body and is fixed to the vehicle body longitudinal beam structure. The vehicle floor protection structure is fixed below the vehicle body middle floor structure.

[0007] The body floor protection structure proposed according to one aspect of the present application, wherein the front rear floor crossbeam structure, the middle rear floor crossbeam structure, and the rear rear floor crossbeam structure are respectively welded to the body center longitudinal beam structure along the longitudinal direction of the vehicle body. The side anti-scraping bottom support structure is welded below the body center longitudinal beam structure. The two body center longitudinal beam structures are respectively arranged at both ends of the front rear floor crossbeam structure, the middle rear floor crossbeam structure, and the rear rear floor crossbeam structure.

[0008] The body floor protection structure proposed according to one aspect of the present application, wherein the front rear floor crossbeam structure includes a front rear floor crossbeam body structure and a front crossbeam end triangular overlapping structure. A first mounting hole is arranged on the front rear floor crossbeam body structure, and the first mounting hole is used for mounting a battery pack or a large fuel tank structure.

[0009] The body floor protection structure proposed according to one aspect of the present application, wherein the middle rear floor crossbeam structure includes a middle rear floor crossbeam body structure and a middle crossbeam end triangular overlapping structure. A first mounting structure and a second mounting structure are arranged on the middle rear floor crossbeam body structure. The first mounting structure is used for mounting a battery pack, and the second mounting structure is used for mounting a small fuel tank structure.

[0010] The body floor protection structure proposed according to one aspect of the present application, wherein the rear rear floor crossbeam structure includes a rear rear floor crossbeam body structure. A second mounting hole is arranged on the rear rear floor crossbeam body structure, and the second mounting hole is used for mounting a small fuel tank structure or a large fuel tank structure.

[0011] The body floor protection structure proposed according to one aspect of the present application, wherein the body center longitudinal beam structure is welded to the front rear floor crossbeam structure, the middle rear floor crossbeam structure, and the rear rear floor crossbeam structure on the side, and the body center longitudinal beam structure is welded to the side anti-scraping bottom support structure on the bottom surface.

[0012] The body floor protection structure proposed according to one aspect of the present application, wherein the cross-section of the side anti-scraping bottom support structure is in a "U" shape. The side anti-scraping bottom support structure includes a front anti-scraping bottom support structure, a rear anti-scraping bottom support structure, and a strengthening support structure.

[0013] The body floor protection structure proposed according to one aspect of the present application, wherein the strengthening support structure is screwed to the front anti-scraping bottom support structure and the rear anti-scraping bottom support structure.

[0014] According to one aspect of this application, the thickness of the rear floor front crossbeam structure, the rear floor middle crossbeam structure, and the rear floor rear crossbeam structure is 1.5 to 3.0 mm, the thickness of the vehicle body longitudinal beam structure is 2.0 to 3.0 mm, and the thickness of the side anti-scratch bottom support structure is 2.0 to 4.0 mm.

[0015] On the other hand, this application provides a vehicle that includes the vehicle floor protection structure described in any of the preceding aspects.

[0016] According to the technical solution of this application, the protection of the vehicle floor can be improved by setting the rear floor front crossbeam structure, rear floor middle crossbeam structure, rear floor rear crossbeam structure, vehicle body middle longitudinal beam structure and side anti-scratch bottom support structure. Attached Figure Description

[0017] The disclosure of this application is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Wherein:

[0018] Figure 1 The vehicle's floor protection structure is shown schematically from one perspective;

[0019] Figure 2 The schematic diagram shows a side view of the vehicle body floor protection structure;

[0020] Figure 3 A schematic top view of the vehicle body floor protection structure is shown;

[0021] Figure 4 The schematic diagram shows a bottom view of the vehicle body floor protection structure;

[0022] Figure 5 A schematic diagram showing the connection between the vehicle floor protection structure and the vehicle floor structure is displayed.

[0023] Figure 6-1 Figures 6-2, 6-3, and 6-4 show schematic diagrams illustrating the structural installation of the vehicle floor protection structure, battery pack, and fuel tank.

[0024] Figure 7-1 Figures 7-2 and 7-3 show schematic diagrams of the structural installation of the vehicle body floor protection structure and the fuel tank.

[0025] Figure 8-1 Figures 8-2 and 8-3 schematically illustrate the side scratch-resistant bottom support structure in the vehicle body floor protection structure. Detailed Implementation

[0026] Embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary, and should not be construed as limiting the scope of protection of the present application.

[0027] First, the coordinate system established herein will be described. The origin O of the coordinate system coincides with the center of mass of the vehicle, and XOZ is in the plane of the vehicle's left-right symmetry. When the vehicle is traveling on a horizontal road surface, the X-axis is parallel to the ground and points forward, the Y-axis points to the left of the driver, and the Z-axis passes through the center of mass and points upward. The longitudinal direction is the direction of the X-axis, and the transverse direction is the direction of the Y-axis. "Front and rear" defines the relative position in the X-axis direction, and "front" is located in the positive direction of the X-axis relative to "rear". "Up and down" defines the relative position in the Z-axis direction, and "up" is located in the positive direction of the Z-axis relative to "down".

[0028] Figure 1 FIG. 7 to FIG. 8 schematically show a body floor protection structure 1 according to a specific embodiment of the present application, which can be used for side pillar collision and anti-scraping of the bottom. The body floor protection structure includes a front rear floor crossbeam structure 10, a middle rear floor crossbeam structure 20, a rear rear floor crossbeam structure 30, a body middle longitudinal beam structure 40, and a side anti-scraping bottom support structure 50. The body floor protection structure is welded below the body middle floor structure 2, playing a role in structural strengthening, lateral support, and anti-scraping of the bottom. The body floor protection structure is in a "day" shape and has an axisymmetric structure, with stable structure. The front rear floor crossbeam structure 10, the middle rear floor crossbeam structure 20, and the rear rear floor crossbeam structure 30 are welded together with the body middle longitudinal beam structure 40 to form a "day" shape structure; the side anti-scraping bottom support structure 50 is welded below the body middle longitudinal beam structure 40, and the side anti-scraping bottom support structure 50 and the body middle longitudinal beam structure 40 are respectively designed with left-right symmetry, that is, they are respectively arranged at both ends of the front rear floor crossbeam structure 10, the middle rear floor crossbeam structure 20, and the rear rear floor crossbeam structure 30.

[0029] The front rear floor crossbeam structure 10 plays a main role in lateral support and strengthening, and includes a front rear floor crossbeam body structure 110 and a front crossbeam end triangular lap structure 120. A first mounting hole 111 is arranged on the front rear floor crossbeam body structure 110; the first mounting hole 111 can be used to mount the battery pack 4 or the large fuel tank structure 5.

[0030] The middle rear floor crossbeam structure 20 plays a main role in lateral support and strengthening, and includes a middle rear floor crossbeam body structure 210 and a middle crossbeam end triangular lap structure 220. A first mounting structure 211 and a second mounting structure 212 are arranged on the front rear floor crossbeam body structure 210; the first mounting structure 211 can be used to mount the battery pack 4, and the second mounting structure 212 can be used to mount the small fuel tank structure 3.

[0031] The rear floor rear crossbeam structure 30 plays a major role in lateral support and strengthening. The rear floor rear crossbeam body structure 310 is provided with second mounting holes 311; the second mounting holes 311 can be used to mount the small fuel tank structure 3 or the large fuel tank structure 5.

[0032] The vehicle body middle longitudinal beam structure 40 is welded to the rear floor front crossbeam structure 10, the rear floor middle crossbeam structure 20 and the rear floor rear crossbeam structure 30 on the side, and is welded to the side anti-scratch bottom support structure 50 on the bottom surface. The cross-sectional structure of the side anti-scratch bottom support structure 50 in the plane perpendicular to the X-axis is in a "U" shape, which plays a major role in side anti-scratch bottom and strengthening, and includes a front-end anti-scratch bottom support structure 510, a rear-end anti-scratch bottom support structure 520 and a strengthening support structure 530; the strengthening support structure 530 is screwed to the front-end anti-scratch bottom support structure 510 and the rear-end anti-scratch bottom support structure 520; the lowermost end of the side anti-scratch bottom support structure 50 is lower than the small fuel tank structure 3, the battery pack 4 and the large fuel tank structure 5, protecting the small fuel tank structure 3, the battery pack 4 and the large fuel tank structure 5 from being scratched at the bottom, resulting in fuel leakage or short-circuit fire of the battery pack.

[0033] The vehicle body floor protection structure 1 transmits the collision force to the other end of the vehicle body through three force transmission paths of the rear floor front crossbeam structure 10, the rear floor middle crossbeam structure 20 and the rear floor rear crossbeam structure 30, and plays a lateral support role, preventing the vehicle body from undergoing large deformation in a side column collision, and effectively protecting the small fuel tank structure 3, the battery pack 4 and the large fuel tank structure 5. The "U"-shaped strengthening structure of the side anti-scratch bottom support structure 50 effectively plays an anti-scratch bottom role.

[0034] Considering the connection strength, the lapping space distance and the quality cost, the preferred design of the vehicle body floor protection structure 1: the thickness of the rear floor front crossbeam structure 10, the rear floor middle crossbeam structure 20 and the rear floor rear crossbeam structure 30 is preferably 1.5 - 3.0 mm, and the length dimension is determined according to the size of the vehicle model. The thickness of the vehicle body middle longitudinal beam structure 40 is preferably 2.0 - 3.0 mm, and the length dimension is determined according to the size of the vehicle model. The thickness of the side anti-scratch bottom support structure 50 is preferably 2.0 - 4.0 mm.

[0035] The vehicle floor protection structure according to this embodiment effectively strengthens the side structure of the vehicle floor and effectively solves the problem of bottom scratch damage to the battery pack and fuel tank structure. Through the designed shape of the vehicle floor protection structure, the load-bearing capacity of the vehicle floor structure is enhanced, providing an efficient lateral force transmission path. This effectively transfers the collision force to the non-collision side of the vehicle structure, effectively solving the problem of excessive side collision force leading to large vehicle deformation and bottom scratch damage to the battery pack and fuel tank structure. Simultaneously, the designed side anti-bottom scratch support structure effectively solves the problem of bottom scratch damage to the battery pack and fuel tank structure, improving the overall vehicle's side pillar collision safety performance. Furthermore, this structure has advantages such as simple structure, low cost, and easy installation, and can be used in the structural design of both traditional and hybrid vehicles, making it highly applicable.

[0036] This application also includes a vehicle with a body floor protection structure having any one or more of the foregoing embodiments, the technical features and effects of which correspond to the foregoing description, and therefore will not be repeated here.

Claims

1. A vehicle floor protection structure, characterized in that, The vehicle body floor protection structure includes a front rear floor crossbeam structure (10), a middle rear floor crossbeam structure (20), a rear rear floor crossbeam structure (30), a vehicle body middle longitudinal beam structure (40), and a side anti-scuffing bottom support structure (50). The vehicle body middle longitudinal beam structure (40) extends along the longitudinal direction of the vehicle body. The front rear floor crossbeam structure (10), the middle rear floor crossbeam structure (20), and the rear rear floor crossbeam structure (30) respectively extend along the transverse direction of the vehicle body and are respectively fixed to the vehicle body middle longitudinal beam structure (40). The side anti-scuffing bottom support structure (50) extends along the longitudinal direction of the vehicle body and is fixed to the vehicle body middle longitudinal beam structure (40). The vehicle body floor protection structure is fixed below the vehicle body middle floor structure (2).

2. The vehicle floor protection structure according to claim 1, characterized in that, The front rear floor crossbeam structure (10), the middle rear floor crossbeam structure (20), and the rear rear floor crossbeam structure (30) are respectively welded to the vehicle body middle longitudinal beam structure (40) along the longitudinal direction of the vehicle body. The side anti-scuffing bottom support structure (50) is welded below the vehicle body middle longitudinal beam structure (40). Two vehicle body middle longitudinal beam structures (40) are respectively arranged at both ends of the front rear floor crossbeam structure (10), the middle rear floor crossbeam structure (20), and the rear rear floor crossbeam structure (30).

3. The vehicle floor protection structure according to claim 1 or 2, characterized in that, The front rear floor crossbeam structure (10) includes a front rear floor crossbeam body structure (110) and a front crossbeam end triangular lap joint structure (120). A first mounting hole (111) is arranged on the front rear floor crossbeam body structure (110). The first mounting hole (111) is used for mounting a battery pack (4) or a large fuel tank structure (5).

4. The vehicle floor protection structure according to claim 1 or 2, characterized in that, The middle rear floor crossbeam structure (20) includes a middle rear floor crossbeam body structure (210) and a middle crossbeam end triangular lap joint structure (220). A first mounting structure (211) and a second mounting structure (212) are arranged on the middle rear floor crossbeam body structure (210). The first mounting structure (211) is used for mounting a battery pack (4). The second mounting structure (212) is used for mounting a small fuel tank structure (3).

5. The vehicle floor protection structure according to claim 1 or 2, characterized in that, The rear rear floor crossbeam structure (30) includes a rear rear floor crossbeam body structure (310). A second mounting hole (311) is arranged on the rear rear floor crossbeam body structure (310). The second mounting hole (311) is used for mounting a small fuel tank structure (3) or a large fuel tank structure (5).

6. The vehicle floor protection structure according to claim 1 or 2, characterized in that, The vehicle body middle longitudinal beam structure (40) is welded to the front rear floor crossbeam structure (10), the middle rear floor crossbeam structure (20), and the rear rear floor crossbeam structure (30) on the side. The vehicle body middle longitudinal beam structure (40) is welded to the side anti-scuffing bottom support structure (50) on the bottom surface.

7. The vehicle floor protection structure according to claim 1 or 2, characterized in that, The cross-section of the side anti-scuffing bottom support structure (50) is in a "C" shape. The side anti-scuffing bottom support structure (50) includes a front end anti-scuffing bottom support structure (510), a rear end anti-scuffing bottom support structure (520), and a strengthening support structure (530).

8. The vehicle floor protection structure according to claim 7, characterized in that, The reinforced support structure (530) is screwed to the front anti-scratch bottom support structure (510) and the rear anti-scratch bottom support structure (520).

9. The vehicle floor protection structure according to claim 1 or 2, characterized in that, The thickness of the rear floor front crossbeam structure (10), the rear floor middle crossbeam structure (20) and the rear floor rear crossbeam structure (30) is 1.5 to 3.0 mm, the thickness of the vehicle body longitudinal beam structure (40) is 2.0 to 3.0 mm, and the thickness of the side anti-scratch bottom support structure (50) is 2.0 to 4.0 mm.

10. A car, characterized in that, It includes a vehicle floor protection structure according to any one of claims 1 to 9.

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