Rear floor structure, body and vehicle

Abstract

The utility model relates to vehicle parts technical field, concretely provides a rear floor structure, car body and vehicle, aims at solving the problem of insufficient strength of existing integrated die casting rear floor when installing elastic and damping integrated suspension. For this purpose, the rear floor structure of the utility model includes parallelly arranged rear crossbeam and middle crossbeam, and the floor connecting the rear crossbeam with the middle crossbeam further includes: two tower package structures symmetrically arranged in the edge part of the floor along the XZ plane of the XYZ coordinate system of the rear floor structure; the main longitudinal beam and the auxiliary longitudinal beam are arranged adjacent to each tower package structure, so that each tower package structure is located between the corresponding main longitudinal beam and auxiliary longitudinal beam; the main longitudinal beam and the auxiliary longitudinal beam extend along the X axis direction of the XYZ coordinate system. The rear floor structure constructs a cross frame shape of '' cross '' through the main longitudinal beam and the auxiliary longitudinal beam arranged adjacent to the tower package structure, improves the bending torsional stiffness, NVH and crash performance of the car body.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, specifically to a rear floor structure, body, and vehicle. Background Technology

[0002] Integrated die-cast rear floor is a new integrated technology developed based on the traditional rear floor structure of automobile bodies. Currently, most chassis suspensions using this technology employ a multi-link structure with separate spring-damping components. This structure primarily features separate designs for elastic elements (such as springs) and damping elements (such as shock absorbers). Multiple links (typically 3 to 5) precisely control wheel position changes, thereby improving handling stability and comfort. The springs and shock absorbers are separate, with spring seats and shock absorbers installed in different locations. Springs support the vehicle body and cushion road impacts, while shock absorbers suppress body vibrations by controlling the compression and rebound speeds of the springs. However, integrated spring-damping suspension requires the mounting points to be integrated into the same location on the integrated die-cast rear floor. This reduces the local structural space of the casting and places higher demands on the performance of the mounting structure; otherwise, insufficient strength, fatigue fracture, and abnormal NVH noises can easily occur. Utility Model Content

[0003] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem of insufficient strength of the existing integrated die-cast floor when installing the spring-loaded integrated suspension.

[0004] In a first aspect, the present invention provides a rear floor structure, including a rear crossbeam and a middle crossbeam arranged in parallel, and a floor connecting the rear crossbeam and the middle crossbeam, further comprising: two tower structures symmetrically arranged at the edge of the floor along the XZ plane of the XYZ coordinate system of the rear floor structure; a main longitudinal beam and a secondary longitudinal beam arranged adjacent to each tower structure, so that each tower structure is located between the corresponding main longitudinal beam and the secondary longitudinal beam; the main longitudinal beam and the secondary longitudinal beam extend along the X-axis direction of the XYZ coordinate system.

[0005] Furthermore, the tower structure includes: a top wall disposed above the floor; side walls extending below the floor along the periphery of the top wall; and main longitudinal beams and secondary longitudinal beams disposed on both sides of the portion of the side walls located below the floor and adjacent to the side walls.

[0006] Furthermore, the rear floor structure also includes: two subframe rear mounting points, which are symmetrically arranged at both ends of the rear crossbeam along the XZ plane; one end of the main longitudinal beam and the secondary longitudinal beam converge at the subframe rear mounting points.

[0007] Furthermore, the rear floor structure also includes: two subframe front mounting points, which are symmetrically arranged at both ends of the middle crossbeam along the XZ plane; the other ends of the main longitudinal beam and the secondary longitudinal beam meet at the subframe rear mounting points.

[0008] Furthermore, the tower structure also includes a connecting wall extending above the floor along the periphery of the top wall.

[0009] Furthermore, the top wall of the tower structure is provided with a first reinforcing rib plate and a second reinforcing rib plate; the first reinforcing rib plate is connected to the top wall and the main longitudinal beam; the second reinforcing rib plate is connected to the top wall and the connecting wall.

[0010] Furthermore, the rear crossbeam includes a top surface, a middle surface, and a bottom surface arranged along the XY plane direction of the XYZ coordinate system, and a reinforcing rib is provided between the top surface, the middle surface, and the bottom surface.

[0011] Furthermore, the lengths of the cross sections of the top, middle, and bottom surfaces along the X-axis direction increase from the midpoint of the rear crossbeam towards both ends of the rear crossbeam.

[0012] In a second aspect, the present invention provides a vehicle body that includes the rear floor structure described above.

[0013] In a third aspect, the present invention also provides a vehicle comprising the vehicle body as described above, and a spring-loaded integrated suspension system, which is connected to the vehicle body via a tower pack structure in the rear floor structure of the vehicle body.

[0014] By adopting the above technical solution, the rear floor structure of this utility model surrounds the tower pack structure with main and secondary longitudinal beams arranged adjacent to it. This creates a cross-shaped frame between the main and secondary longitudinal beams and the tower pack structure, which not only improves the local strength of the tower pack structure but also enhances the overall integrity of the rear floor structure. After installing the integrated spring-loaded suspension on the die-cast rear floor structure, the main force transmission path is established within the limited structural space by setting up the main and secondary longitudinal beams, creating a reasonable structural frame shape and improving the vehicle's bending and torsional stiffness, NVH, and collision performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the rear floor structure in an embodiment of this application;

[0017] Figure 2 for Figure 1 A bottom view of the middle and rear floor structure;

[0018] Figure 3 This is a schematic diagram of the tower structure in the rear floor structure of this application embodiment;

[0019] Figure 4 This is a bottom view of the tower structure in the rear floor structure of this application embodiment;

[0020] Figure 5 This is a side view of the tower structure in the rear floor structure of this application embodiment;

[0021] Figure 6 This is a front view of the rear crossbeam in the rear floor structure in this embodiment of the application;

[0022] Figure 7A For the rear crossbeam at Figure 1 Cross-sectional view at point AA;

[0023] Figure 7B For the rear crossbeam at Figure 1 Cross-sectional view at point BB.

[0024] Figure label:

[0025] 10. Rear crossbeam; 11. Top surface; 12. Middle surface; 13. Bottom surface; 14. Reinforcing rib; 15. Rear mounting point of subframe; 20. Middle crossbeam; 21. Front mounting point of subframe; 30. Floor; 40. Front crossbeam; 50. Tower structure; 51. Top wall; 52. Side wall; 53. Connecting wall; 54. First reinforcing rib plate; 55. Second reinforcing rib plate; 60. Main longitudinal beam; 70. Secondary longitudinal beam. Detailed Implementation

[0026] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0027] First, it should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "longitudinal," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] like Figure 1 and Figure 2 As shown, this application embodiment provides a rear floor structure, including a rear crossbeam 10, a middle crossbeam 20 and a front crossbeam 40 arranged in parallel, as well as two tower structure 50 and a main longitudinal beam 60 and a secondary longitudinal beam 70 corresponding to each tower structure 50.

[0030] Specifically, the rear crossbeam 10 and the middle crossbeam 20 are connected by the floor 30, and the front crossbeam 40 and the middle crossbeam 20 are connected by corresponding components (e.g., sheet metal structural components), thereby forming the main frame of the rear floor structure. Two tower structures 50 are symmetrically arranged at the edge of the floor 30 along the XZ plane of the XYZ coordinate system of the rear floor structure.

[0031] It should be noted that in this embodiment, the XYZ coordinates of the rear floor structure adopt the vehicle's overall XYZ coordinate system. For example... Figure 1 As shown, the X-axis represents the front-to-back direction of the vehicle, with the front of the vehicle being the negative direction of the X-axis; the Y-axis represents the left-to-right direction of the vehicle, with the left side of the vehicle being the negative direction of the Y-axis; and the Z-axis represents the up-and-down direction of the vehicle, with the top of the vehicle being the positive direction of the Z-axis.

[0032] Each tower package structure 50 is arranged adjacent to its corresponding main longitudinal beam 60 and secondary longitudinal beam 70, so that each tower package structure 50 is located between the corresponding main longitudinal beam 60 and secondary longitudinal beam 70. The main longitudinal beam 60 and secondary longitudinal beam 70 extend along the X-axis direction of the XYZ coordinate system.

[0033] Furthermore, such as Figures 1 to 4The tower structure 50 shown includes a top wall 51, side walls 52, and connecting wall 53. The top wall 51 is positioned above the floor 30; the side walls 52 extend along the periphery of the top wall 51 downwards from the floor 30, forming a downward-opening cylindrical structure with the top wall 51, which can be used to accommodate the spring-loaded integrated structural component; the top wall 51 has holes (e.g., mounting holes, positioning holes) for fixing the spring-loaded integrated structural component located below the top wall 51.

[0034] The main longitudinal beam 60 and the secondary longitudinal beam 70 are located on both sides of the side wall 52 of the tower structure 50 below the floor 30, and are adjacent to the side wall 52. Specifically, the main longitudinal beam 60 is located on the side of the side wall 52 of the tower structure 50 closer to the XZ plane in the XYZ coordinate system; the secondary longitudinal beam 70 is located on the side of the side wall 52 away from the XZ plane in the XYZ coordinate system. The connecting wall 53 extends upwards from the periphery of the top wall 51 towards the floor 30, and is used to connect with components on the side of the vehicle body (e.g., C-pillar reinforcement). This connects the components on the side of the vehicle body with components on the top of the vehicle body, forming a closed ring structure. This improves the overall strength of the vehicle body, the torsional stiffness of the entire vehicle, and the rear-end mode, thereby enhancing the vehicle's NVH and fatigue durability performance.

[0035] Furthermore, such as Figure 2 and Figure 4 As shown, the rear floor structure in this embodiment further includes two subframe rear mounting points 15 and two subframe front mounting points 21 for fixing the subframe. The two subframe rear mounting points 15 are symmetrically arranged along the XZ plane at both ends of the rear crossbeam 10, with one end of the main longitudinal beam 60 and the secondary longitudinal beam 70 converging at the subframe rear mounting points 15. The two subframe front mounting points 21 are symmetrically arranged along the XZ plane at both ends of the middle crossbeam 20; the other end of the main longitudinal beam 60 and the secondary longitudinal beam 70 converging at the subframe rear mounting points 15. This arrangement establishes a force transmission path between the subframe rear mounting points 15 and the subframe front mounting points 21, specifically as follows... Figure 4 and Figure 5 As shown by the arrow in the image.

[0036] In one specific embodiment, the main longitudinal beam 60 and the secondary longitudinal beam 70 can be ribbed structures.

[0037] In this embodiment, the rear floor structure uses main longitudinal beams 60 and secondary longitudinal beams 70, which are arranged adjacent to the tower pack structure 50, to enclose the tower pack structure 50. This creates a cross-shaped frame between the main longitudinal beams 60 and secondary longitudinal beams 70 and the tower pack structure 50, improving not only the local strength of the tower pack structure 50 but also the overall integrity of the rear floor structure, thus enhancing the vehicle's torsional stiffness and collision performance. By having the two ends of the main longitudinal beams 60 and secondary longitudinal beams 70 converge at the rear mounting point 15 and the front mounting point 21 of the subframe, respectively, the enclosure of the tower pack structure 50 by the main longitudinal beams 60 and secondary longitudinal beams 70 becomes tighter, and a force transmission path is established from the rear mounting point 15 to the front mounting point 21 of the subframe. Furthermore, the main longitudinal beams 60 and secondary longitudinal beams 70 are also designed as curved structures. The combination of these aspects further enhances the strength of the tower pack structure 50 and the overall integrity of the rear floor structure.

[0038] Furthermore, such as Figure 3 As shown, a first reinforcing rib plate 54 and a second reinforcing rib plate 55 are provided on the top wall 51 of the tower structure 50. The first reinforcing rib plate 54 is connected to the top wall 51 and the main longitudinal beam 60, and the second reinforcing rib plate 55 is connected to the top wall 51 and the connecting wall 53, thereby further improving the strength of the tower structure 50. By providing the first reinforcing rib plate 54, the force transmission path between the tower structure 50 and the main longitudinal beam 60 is increased; by providing the second reinforcing rib plate 55, the force transmission path between the tower structure 50 and the components on the side of the vehicle body via the connecting wall 53 is increased, specifically as follows: Figure 3 As indicated by the arrows in the diagram. There can be multiple first reinforcing ribs 54 and second reinforcing ribs 55. The number and arrangement of the first reinforcing ribs 54 and second reinforcing ribs 55 can be determined according to the specific circumstances. This application embodiment does not impose specific limitations on this.

[0039] like Figure 1 , Figure 6 , Figure 7A and Figure 7B As shown, the rear crossbeam 10 includes a top surface 11, a middle surface 12, and a bottom surface 13 arranged along the XY plane direction of the XYZ coordinate system. A reinforcing rib 14 is provided between the top surface 11, the middle surface 12, and the bottom surface 13 to improve the connection strength between them. In the top surface 11, the middle surface 12, and the bottom surface 13 along the XY plane direction, cavities are formed between adjacent top surfaces 11 and middle surfaces 12, and between adjacent middle surfaces 12 and bottom surfaces 13. The opening end of this cavity is along the Y-axis direction of the XYZ coordinate system. Compared to existing rear crossbeams 10 where the opening end of the cavity is arranged along the Z-axis direction of the XYZ coordinate system (i.e., each surface of the rear crossbeam 10 is arranged along the XZ plane direction of the XYZ coordinate system), the rear crossbeam 10 in this embodiment has higher torsional stiffness.

[0040] Furthermore, such as Figure 1 , Figure 2 , Figure 6 , Figure 7A and Figure 7B As shown, the lengths of the cross sections of the top surface 11, middle surface 12, and bottom surface 13 of the rear crossbeam 10 along the X-axis increase from the midpoint of the rear crossbeam 10 towards both ends. This arrangement maintains the torsional stiffness of the rear crossbeam 10 while reducing its weight.

[0041] In this embodiment of the application, the rear crossbeam 10 in the rear floor structure is provided with a top surface 11, a middle surface 12, and a bottom surface 13 along the XY plane direction of the XYZ coordinate system, which constructs three structural paths to transmit the forces between the rear mounting points 15 of the subframe, thereby improving the torsional stiffness of the whole vehicle and the dynamic / static stiffness of the rear mounting points 15 of the subframe and the tower mount points, and improving the NVH performance of the whole vehicle.

[0042] Furthermore, the rear floor structure is made using a one-piece die-casting process.

[0043] This application embodiment also provides a vehicle body that includes the rear floor structure described above.

[0044] This application also provides a vehicle comprising the body as described above and a spring-loaded integrated suspension system. The spring-loaded integrated suspension system is connected to the body via a tower pack structure 50 in the rear floor structure of the vehicle body.

[0045] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A rear floor structure, comprising a rear crossbeam (10) and a middle crossbeam (20) arranged in parallel, and a floor (30) connecting the rear crossbeam (10) and the middle crossbeam (20), characterized in that, Also includes: Two tower structures (50) are symmetrically arranged at the edge of the floor (30) along the XZ plane of the XYZ coordinate system of the rear floor structure; A main longitudinal beam (60) and a secondary longitudinal beam (70) are arranged adjacent to each of the tower package structures (50) so that each of the tower package structures (50) is located between the corresponding main longitudinal beam (60) and the secondary longitudinal beam (70); The main longitudinal beam (60) and the secondary longitudinal beam (70) extend along the X-axis direction of the XYZ coordinate system.

2. The rear floor structure according to claim 1, characterized in that, The tower structure (50) includes: A top wall (51) is provided above the floor (30); Sidewall (52) extending below the floor (30) along the periphery of the top wall (51); The main longitudinal beam (60) and the secondary longitudinal beam (70) are located on both sides of the portion of the side wall (52) below the floor (30) and are adjacent to the side wall (52).

3. The rear floor structure according to claim 2, characterized in that, Also includes: Two subframe rear mounting points (15) are symmetrically arranged at both ends of the rear crossbeam (10) along the XZ plane; One end of the main longitudinal beam (60) and the secondary longitudinal beam (70) meet at the rear mounting point (15) of the subframe.

4. The rear floor structure according to claim 3, characterized in that, Also includes: Two subframe front mounting points (21) are symmetrically arranged at both ends of the middle crossbeam (20) along the XZ plane; the other ends of the main longitudinal beam (60) and the secondary longitudinal beam (70) meet at the subframe front mounting points (21).

5. The rear floor structure according to claim 2, characterized in that, The tower structure (50) also includes a connecting wall (53) extending above the floor along the periphery of the top wall (51).

6. The rear floor structure according to claim 5, characterized in that, The top wall (51) of the tower structure (50) is provided with a first reinforcing rib plate (54) and a second reinforcing rib plate (55); The first reinforcing rib (54) is connected to the top wall (51) and the main longitudinal beam (60); The second reinforcing rib (55) is connected to the top wall (51) and the connecting wall (53).

7. The rear floor structure according to claim 1, characterized in that, The rear crossbeam (10) includes a top surface (11), a middle surface (12) and a bottom surface (13) arranged along the XY plane direction of the XYZ coordinate system, and a reinforcing rib (14) is provided between the top surface (11), the middle surface (12) and the bottom surface (13).

8. The rear floor structure according to claim 7, characterized in that, The lengths of the cross sections of the top surface (11), middle surface (12), and bottom surface (13) along the X-axis direction increase from the midpoint of the rear crossbeam (10) towards both ends of the rear crossbeam (10).

9. A vehicle body, characterized in that, Includes the rear floor structure as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, include: The vehicle body as described in claim 9, and The spring-load integrated suspension system is connected to the vehicle body via a tower pack structure (50) in the rear floor structure of the vehicle body.

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