Integrated rear floor frame assembly and vehicle

Abstract

The invention provides an integrated rear floor frame assembly. The integrated rear floor frame assembly comprises a rear floor and a frame body, the front cross beam, the middle cross beam and the rear cross beam are integrally formed on the rear floor in an aluminum casting mode, and the front cross beam, the middle cross beam and the rear cross beam are sequentially arranged in the length direction of the rear floor; the left longitudinal beam and the right longitudinal beam are integrally formed on the rear floor in an aluminum casting mode, and the left longitudinal beam and the right longitudinal beam are arranged on the two sides of the rear floor in the width direction in a one-to-one correspondence mode respectively; reinforcing ribs are integrally formed on the front cross beam, the middle cross beam, the rear cross beam, the left longitudinal beam and the right longitudinal beam in an aluminum casting mode. According to the integrated rear floor frame assembly and the vehicle, the safety performance of the vehicle body is improved, the production efficiency is improved, and lightweight development of the rear floor is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle floor frame, in particular to an integrated rear floor frame assembly and a vehicle. BACKGROUND

[0002] With the rapid development of the automobile industry and the continuous improvement of consumer requirements for automobile performance, various performance indicators of the automobile body have received unprecedented attention. As a key factor in automobile design and manufacturing, the body stiffness not only affects the safety and handling of the automobile, but also is closely related to the NVH (Noise, Vibration, Harshness) performance in the vehicle, i.e. noise, vibration and harshness performance. At the same time, the innovative design and material application of automobile parts are also continuously advancing.

[0003] The rear floor is the rear half of the body floor, usually located below the rear seats to the trunk area, and connects with the front floor (below the cockpit). In the existing automobile production scheme, a plurality of sheet metals are welded to form the body rear floor and the components located on the rear floor. Not only the performance and safety performance of the body, such as the overall stiffness and local stiffness of the rear floor and related components, the NVH performance of the whole vehicle, the vibration in the vehicle, the anti-collision ability, etc. all need to be improved; but also in terms of production efficiency and lightweight development of the whole vehicle, there are problems of too many parts, complex assembly process, and heavy weight of the assembled rear floor, which reduces the production efficiency and is not conducive to the lightweight of the vehicle. SUMMARY

[0004] The present application provides an integrated rear floor frame assembly and a vehicle to solve the problems in the prior art, improve the body and safety performance, improve the production efficiency, and realize the lightweight development of the rear floor.

[0005] The integrated rear floor frame assembly provided by the present application comprises: a rear floor formed by one-piece casting aluminum; a front cross beam, a middle cross beam and a rear cross beam formed by one-piece casting aluminum on the rear floor, the front cross beam, the middle cross beam and the rear cross beam being arranged in sequence along the length direction of the rear floor; a left longitudinal beam and a right longitudinal beam formed by one-piece casting aluminum on the rear floor, the left longitudinal beam and the right longitudinal beam being arranged one by one on both sides of the rear floor along the width direction; and a reinforcing rib formed by one-piece casting aluminum on the front cross beam, the middle cross beam, the rear cross beam, the left longitudinal beam and the right longitudinal beam.

[0006] Optionally, the left longitudinal beam and the right longitudinal beam are sequentially formed by one-piece along the length direction, and have a rear subframe front mounting area, a rear shock absorber mounting area, a rear coil spring mounting area and a rear subframe rear mounting area; and the rear subframe front mounting area, the rear shock absorber mounting area, the rear coil spring mounting area and the rear subframe rear mounting area are formed by one-piece with the reinforcing rib.

[0007] Optionally, the front cross beam has a linear length greater than 70 mm in the height direction and a linear length greater than 60 mm in the length direction; the middle cross beam has a linear length greater than 70 mm in the height direction and a linear length greater than 160 mm in the length direction; the rear cross beam has a linear length greater than 70 mm in the height direction and a linear length greater than 110 mm in the length direction; the left longitudinal beam and the right longitudinal beam have a linear length greater than 120 mm in the height direction and a linear length greater than 80 mm in the width direction.

[0008] Optionally, the rear floor has a thickness greater than 3 mm in the height direction; the part of the rear floor between the front cross beam and the middle cross beam is provided with a first reinforcing rib, a second reinforcing rib and a third reinforcing rib extending in the length direction, the first reinforcing rib, the second reinforcing rib and the third reinforcing rib are arranged in sequence in the width direction; the first reinforcing rib, the second reinforcing rib and the third reinforcing rib have a linear length greater than or equal to 6 mm in the height direction and a linear length greater than 150 mm in the width direction.

[0009] Optionally, the upper part of the front cross beam is integrally formed with at least two seat mounting supports arranged in the width direction; the front cross beam is integrally formed with a reinforcing cross rib connected between adjacent seat mounting supports; the front cross beam is provided with reinforcing longitudinal ribs on the front side and the rear side of a single seat mounting support.

[0010] Optionally, the lower part of the front cross beam is integrally formed with at least two front cross ribs extending in the length direction; the lower part of the middle cross beam is integrally formed with at least two middle cross ribs extending in the length direction; the lower part of the rear cross beam is integrally formed with a rear cross rib; the front cross rib is provided with a support short rib in the area below the seat mounting support; the middle cross rib and the rear cross rib are respectively provided with a first support inclined rib and a second support inclined rib.

[0011] Optionally, the front mounting area of the rear subframe includes a first frame mounting column and a second frame mounting column integrally formed on the left longitudinal beam and the right longitudinal beam respectively and located on the extension line of the middle cross beam; the rear mounting area of the rear subframe includes a third frame mounting column and a fourth frame mounting column integrally formed on the left longitudinal beam and the right longitudinal beam respectively and located on the extension line of the rear cross beam.

[0012] Optionally, the rear shock absorber mounting area includes a left connecting frame and a right connecting frame connected to the vehicle body, the left connecting frame is integrally formed on the left longitudinal beam, and the right connecting frame is integrally formed on the right longitudinal beam; the left longitudinal beam and the right longitudinal beam are provided with at least two shock absorbing vertical ribs arranged in the length direction of the vehicle body in the area below the left connecting frame and the right connecting frame respectively, and a shock absorbing horizontal rib is connected between adjacent shock absorbing vertical ribs.

[0013] Optionally, the rear coil spring mounting area comprises a left rear coil spring mounting surface integrally formed on the left longitudinal beam and a right rear coil spring mounting surface integrally formed on the right longitudinal beam; vertical support ribs are integrally formed on the cavity above the left rear coil spring mounting surface where the left longitudinal beam is located and above the right rear coil spring mounting surface where the right longitudinal beam is located.

[0014] The application also provides a vehicle comprising the integrated rear floor frame assembly.

[0015] The above technical solution has the following beneficial effects:

[0016] The integrated rear floor frame assembly and the vehicle provided by the application have the following advantages: the front cross beam, the middle cross beam, the rear cross beam, the left longitudinal beam and the right longitudinal beam are integrally formed on the rear floor, and the reinforcing ribs are arranged on the above components to form the rear floor frame assembly. In terms of performance, the overall stiffness and the local dynamic stiffness of the rear floor and the related parts are significantly improved, the NVH performance of the vehicle is effectively improved, the vibration and noise in the vehicle are reduced, and the driving comfort is improved. Meanwhile, the high-stiffness frame assembly structure enhances the handling performance and the safety performance of the vehicle, so that the vehicle is more stable and reliable during driving, and the passengers in the vehicle can be better protected during a collision. In terms of production efficiency, the number of parts and the welding procedures are reduced, the production process is simplified, the production time and cost are reduced, the production efficiency is improved, and the production is more suitable for large-scale automobile production. In terms of vehicle lightening, the application of the cast aluminum material realizes the lightening of the rear floor frame assembly, reduces the energy consumption, and improves the power performance of the vehicle. For new energy vehicles, the application helps to improve the endurance mileage. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the application will be described in detail below with reference to the accompanying drawings, so as to help understand the purposes and advantages of the application, in which:

[0018] Figure 1 The first view of the top structure of the integrated rear floor frame assembly provided by the optional embodiments of the application.

[0019] Figure 2 The second view of the top structure of the integrated rear floor frame assembly provided by the optional embodiments of the application.

[0020] Figure 3 The schematic view of the bottom structure of the integrated rear floor frame assembly provided by the optional embodiments of the application.

[0021] Figure 4 The top view of the bottom structure of the integrated rear floor frame assembly provided by the optional embodiments of the application.

[0022] Figure 5An outer side view of the rear shock absorber mounting area provided for an alternative embodiment of the present application.

[0023] Figure 6 An inner side view of the rear shock absorber mounting area provided for an alternative embodiment of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 100 - rear floor, 1000 - first reinforcing bead, 1001 - second reinforcing bead, 1002 - third reinforcing bead;

[0026] 1 - front cross beam, 10 - seat mounting support, 11 - reinforcing cross bead, 12 - reinforcing longitudinal bead, 13 - front cross bead, 14 - support bead, 15 - front cross beam cavity, 16 - middle cross beam cavity, 17 - rear cross beam cavity;

[0027] 2 - middle cross beam, 20 - middle cross bead, 21 - first support diagonal bead, 22 - first reinforcing column;

[0028] 3 - rear cross beam, 30 - rear cross bead, 31 - second support diagonal bead, 32 - second reinforcing column;

[0029] 4 - left longitudinal beam, 40 - shock absorbing vertical bead, 41 - shock absorbing cross bead, 42 - cross reinforcing bead, 43 - vertical support bead;

[0030] 5 - right longitudinal beam;

[0031] 6 - rear subframe front mounting area, 60 - first frame mounting column, 61 - second frame mounting column, 62 - first support longitudinal bead, 63 - first support cross bead;

[0032] 7 - rear shock absorber mounting area, 70 - left connecting frame, 71 - right connecting frame, 72 - mounting surface, 73 - upper reinforcing bead of mounting surface, 74 - lower reinforcing bead of mounting surface, 75 - reinforcing cavity, 76 - inner side support surface, 77 - first triangular bead, 78 - second triangular bead, 79 - third triangular bead;

[0033] 8 - rear coil spring mounting area, 80 - left rear coil spring mounting surface, 81 - right rear coil spring mounting surface, 82 - longitudinal reinforcing bead;

[0034] 9 - rear subframe rear mounting area, 90 - third frame mounting column, 91 - fourth frame mounting column, 92 - third support cross bead. DETAILED DESCRIPTION

[0035] The technical solutions of the present application are further described in detail below by way of examples and in conjunction with the drawings. In the present specification, the orientation terms mentioned or possibly mentioned, such as up, down, left, right, front, back, front face, back face, top, bottom, etc., are defined with respect to the configuration shown in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component, which are relative concepts, and thus can change accordingly depending on the different positions and different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0036] In the present application, the length direction is the length direction of the vehicle body, the width direction is the width direction of the vehicle body, and the height direction is the height direction of the vehicle body.

[0037] The present application provides an integrated rear floor frame assembly, which comprises an integrated cast aluminum rear floor 100, a front cross beam 1, a middle cross beam 2 and a rear cross beam 3 integrally cast and formed on the rear floor 100, and a left longitudinal beam 4 and a right longitudinal beam 5 integrally cast and formed on the rear floor 100.

[0038] Please refer to Figures 1 to 2 The front cross beam 1, the middle cross beam 2 and the rear cross beam 3 are arranged in sequence along the length direction of the rear floor 100. The left longitudinal beam 4 and the right longitudinal beam 5 are arranged one by one on both sides of the rear floor 100 along the width direction.

[0039] The front cross beam 1, the middle cross beam 2, the rear cross beam 3, the left longitudinal beam 4 and the right longitudinal beam 5 are integrally cast and formed with reinforcing ribs. The use of aluminum alloy casting ensures that the rear floor frame assembly can accurately replicate the shape of the mold during the molding process, reducing casting defects. At the same time, the cast aluminum alloy also has high strength and stiffness to meet the mechanical performance requirements of the automobile rear floor assembly under various working conditions. In addition, the use of cast aluminum alloy for the rear floor frame assembly is conducive to achieving the lightweight characteristics of the rear floor assembly.

[0040] The integrated rear floor frame assembly provided by the application is formed by integrating the front cross beam 1, the middle cross beam 2, the rear cross beam 3, the left longitudinal beam 4 and the right longitudinal beam 5 into the rear floor 100, and the reinforcing ribs are arranged on each of the components to form the rear floor frame assembly. In terms of performance, the overall stiffness and the local dynamic stiffness of the rear floor 100 and the related parts are significantly improved, the NVH performance of the vehicle is effectively improved, the vibration and noise in the vehicle are reduced, and the driving comfort is improved. At the same time, the high-stiffness frame assembly structure also enhances the handling performance and safety performance of the vehicle, so that the vehicle is more stable and reliable during driving, and the passengers in the vehicle can be better protected during a collision. In terms of production efficiency: the number of components and the welding process are reduced, the production process is simplified, the production time and cost are reduced, the production efficiency is improved, and the demand for large-scale automobile production is better met. In terms of vehicle lightweighting, the application of cast aluminum material realizes the lightweighting of the rear floor frame assembly, which reduces energy consumption and improves the power performance of the vehicle. For new energy vehicles, it helps to improve the endurance mileage.

[0041] In an optional embodiment, the left longitudinal beam 4 and the right longitudinal beam 5 are sequentially and integrally formed with a rear subframe front mounting area 6, a rear shock absorber mounting area 7, a rear coil spring mounting area 8 and a rear subframe rear mounting area 9 along the length direction. The rear subframe front mounting area 6, the rear shock absorber mounting area 7, the rear coil spring mounting area 8 and the rear subframe rear mounting area 9 are integrally formed with the reinforcing ribs. Please refer to Figure 3 The mounting areas described above are the connection points of the chassis suspension and the vehicle body, which play a decisive role in the NVH performance of the vehicle. By integrally forming the mounting areas on the left longitudinal beam 4 and the right longitudinal beam 5 and integrally forming the reinforcing ribs on the structures thereof, good NVH performance can be ensured, and the structures have sufficient dynamic stiffness to effectively block and attenuate the vibration and impact from the chassis, prevent the vibration and impact of the chassis from being transmitted into the vehicle, and thus create a quiet and comfortable driving environment for the passengers in the vehicle.

[0042] In an optional embodiment, the front crossbeam 1 has a straight length greater than 70 mm in the height direction and a straight length greater than 60 mm in the length direction; the center crossbeam 2 has a straight length greater than 70 mm in the height direction and a straight length greater than 160 mm in the length direction; the rear crossbeam 3 has a straight length greater than 70 mm in the height direction and a straight length greater than 110 mm in the length direction; the left longitudinal beam 4 and the right longitudinal beam 5 have a straight length greater than 120 mm in the height direction and a straight length greater than 80 mm in the width direction. The dimensions of the front crossbeam 1, center crossbeam 2, rear crossbeam 3, left longitudinal beam 4, and right longitudinal beam 5 along the vehicle body height direction must be met to ensure that the rear floor 100 has sufficient vertical rigidity. The required dimensions of the front cross member 1, the middle cross member 2 and the rear cross member 3 along the length of the vehicle body, as well as the required dimensions of the left longitudinal member 4 and the right longitudinal member 5 along the width of the vehicle body, can provide a solid structural foundation for the rear floor 100, thereby minimizing deformation when subjected to various complex external forces and maintaining the stability and reliability of the vehicle body.

[0043] In an optional embodiment, the thickness of the rear floor panel 100 along the height direction is greater than 3 mm. The portion of the rear floor panel 100 located between the front cross member 1 and the center cross member 2 is provided with a first reinforcing rib 1000, a second reinforcing rib 1001, and a third reinforcing rib 1002 extending along the length direction. The first reinforcing rib 1000, the second reinforcing rib 1001, and the third reinforcing rib 1002 are arranged sequentially along the width direction of the vehicle body. The straight length of the first reinforcing rib 1000, the second reinforcing rib 1001, and the third reinforcing rib 1002 along the height direction is greater than or equal to 6 mm, and the straight length along the width direction is greater than 150 mm. The preferred spacing along the width direction is 200 mm. The present application sets the thickness of the rear floor 100 to be greater than 3 mm, and sets the first reinforcing rib 1000, the second reinforcing rib 1001 and the third reinforcing rib 1002 between the front cross beam 1 and the middle cross beam 2 according to the above-mentioned size requirements. This can effectively ensure the rigidity of the rear floor 100 without increasing the weight of the rear floor 100, while reducing the normal sound radiation capability of the large sheet material.

[0044] In an optional embodiment, at least two seat mounting supports 10 arranged in a widthwise direction are provided on the upper portion of the front crossbeam 1; reinforcing transverse ribs 11 are provided on the front crossbeam 1 to connect adjacent seat mounting supports 10, and reinforcing longitudinal ribs 12 are provided on the front crossbeam 1 on both the front and rear sides of a single seat mounting support 10. Figure 2As shown, the reinforcing longitudinal ribs 12 are triangular in shape and are respectively arranged at the front and rear of the seat mounting support 10 along the length direction of the vehicle body to stably support the seat mounting support 10 and increase the structural strength of the seat mounting support 10; the reinforcing transverse ribs 11 are connected between adjacent seat mounting supports 10 to increase the structural stability of adjacent seat supports 10, and at the same time provide supporting stiffness for the seat mounting bracket to reduce the vibration of the seat body under bumpy road conditions.

[0045] Alternatively, see Figure 2 The height of the reinforcing transverse rib 11 is not less than half the height of the seat mounting support 10, and the height of the reinforcing longitudinal rib 12 is close to the seat mounting support 10, so as to further improve the supporting effect of the seat mounting support 10.

[0046] in addition, Figure 2 The number of the seat mounting supports 10 shown in the figure is four, which is a reliable embodiment that can stably support the rear seats. Those skilled in the art can also adjust the number of the seat mounting supports 10 according to the required seat support requirements.

[0047] In an optional embodiment, the lower portion of the front cross beam 1 is integrally formed with at least two front cross ribs 13 extending in the length direction, and at least two front cross ribs 13 are arranged along the length direction of the vehicle body; the lower portion of the middle cross beam 2 is integrally formed with at least two middle cross ribs 20 extending in the length direction, and at least two middle cross ribs 20 are arranged along the length direction of the vehicle body, and the lower portion of the rear cross beam 3 is integrally formed with rear cross ribs 30; the front cross rib 13 is located in the lower area of ​​the seat mounting support 10 and is provided with a supporting short rib 14, and the middle cross rib 20 and the rear cross rib 30 are respectively provided with a first supporting oblique rib 21 and a second supporting oblique rib 31 in a one-to-one correspondence.

[0048] Please refer to the attached Figure 2 and attached Figure 3 The front transverse ribs 13 and the rear floor 100 that bulges downward at the front form a front crossbeam cavity 15 below the rear floor 100. Short supporting ribs 14 are arranged in the front crossbeam cavity 15 and below the seat mounting bracket 10 to enhance the supporting stiffness of the seat mounting bracket 10 and reduce the discomfort of the rear seats caused by vibrations from bumpy roads.

[0049] Please refer to Figure 2 and Figure 3The middle cross beams 16 are defined between the frontmost middle cross beams 20 and the rearmost middle cross beams 20 along the length direction of the vehicle body, and the first support inclined beams 21 are arranged between the adjacent middle cross beams 20, so that the middle cross beams 16 and the first support inclined beams 21 effectively increase the support strength. The rear cross beams 17 are defined between the frontmost rear cross beams 30 and the rearmost rear cross beams 30 along the length direction of the vehicle body, and the second support inclined beams 31 are arranged between the adjacent rear cross beams 30, so that the rear cross beams 17 and the second support inclined beams 31 effectively increase the support strength of the middle cross beams 20.

[0050] As shown in Figure 4 , the middle cross beams 20 and the rear cross beams 30 are respectively provided with a plurality of first reinforcing columns 22 and second reinforcing columns 32 along the width direction of the vehicle body. The first support inclined beams 21 arranged between the adjacent middle cross beams 20 are connected to the first reinforcing columns 22 of the adjacent middle cross beams 20 along the width direction of the vehicle body, so as to form X-shaped beams. The interval between the adjacent reinforcing columns 18 is 100-150 mm, so that the intersection and the midpoint of the X-shaped beams are cylindrical structures, thereby ensuring the casting quality.

[0051] In an optional embodiment, the front mounting area 6 of the rear subframe includes a first frame mounting column 60 and a second frame mounting column 61 which are respectively integrally formed on the left longitudinal beam 4 and the right longitudinal beam 5 and located on the extension line of the middle cross beam 2. The rear mounting area 9 of the rear subframe includes a third frame mounting column 90 and a fourth frame mounting column 91 which are respectively integrally formed on the left longitudinal beam 4 and the right longitudinal beam 5 and located on the extension line of the rear cross beam 3. Please refer to Figure 3 and Figure 4 The first frame mounting column 60, the second frame mounting column 61, the third frame mounting column 90 and the fourth frame mounting column 91 are all cylindrical structures. The front mounting area 6 of the rear subframe is provided with a first support longitudinal beam 62 along the length direction, and the height of the first support longitudinal beam 62 is about 30 mm. The front mounting area 6 of the rear subframe is provided with a second support cross beam 63 along the width direction, and the second support cross beam 63 extends to the middle cross beam 20 of the middle cross beam 2 and is slightly lower than the bottom surface of the first frame mounting column 60 by 10 mm. The rear mounting area 9 of the rear subframe is provided with a third support cross beam 92 along the width direction, and the third support cross beam 92 extends to the rear cross beam 30 of the rear cross beam 3 and is slightly lower than the bottom surface of the third frame mounting column 90 by 10 mm.

[0052] The first support longitudinal beam 62, the second support cross beam 63 and the third support cross beam 92 form a transmission path with the surrounding structure, thereby improving the circumferential structural rigidity of the mounting columns.

[0053] In an alternative embodiment, the rear shock absorber mounting area 7 comprises a left connecting frame 70 and a right connecting frame 71 connected to the vehicle body, the left connecting frame 70 is integrally formed with the left longitudinal beam 4, and the right connecting frame 71 is integrally formed with the right longitudinal beam 5; the left longitudinal beam 4 below the left connecting frame 70 and the right longitudinal beam 5 below the right connecting frame 71 are both provided with at least two shock-absorbing vertical ribs 40 arranged along the length direction of the vehicle body, and shock-absorbing horizontal ribs 41 are connected between adjacent shock-absorbing vertical ribs 40 to increase the structural stability of the shock-absorbing vertical ribs 40.

[0054] Please refer to Figure 3 and Figure 5 , the shock-absorbing vertical ribs 40 are supported on the inner upper surface and the inner lower surface of the outer cavity of the left longitudinal beam 4 and the right longitudinal beam 5, and to further increase the structural strength of the rear shock absorber mounting area 7, the front and rear areas of the left longitudinal beam 4 below the left connecting frame 70 and the front and rear areas of the right longitudinal beam 5 below the right connecting frame 71 are provided with cross stiffeners 42, which can be X-shaped and have the same height as the left longitudinal beam 4 or the right longitudinal beam 5 along the width direction of the vehicle body.

[0055] To further improve the vertical stiffness of the rear shock absorber mounting area 7, mounting surfaces 72 are provided between the left connecting frame 70 and the left longitudinal beam 4, and between the right connecting frame 71 and the right longitudinal beam 5, and upper mounting surface stiffeners 73 and lower mounting surface stiffeners 74 are provided on the mounting surfaces 72 and extend in the height direction, in addition, the areas where the upper mounting surface stiffeners 73 and the lower mounting surface stiffeners 74 are located are provided with reinforcing cavities to further increase the structural stiffness.

[0056] The inner structure of the rear shock absorber mounting area 7 is shown in Figure 6 , which includes an inner support surface 76 in the shape of a pyramid with a large lower part and a small upper part, and a first triangular rib 77 is provided on the upper part of the inner support surface 76. A second triangular rib 78 is provided on the periphery of the inner support surface 76 along the length direction of the vehicle body, and a third triangular rib 79 is provided along the width direction of the vehicle body, the third triangular rib 79 is located on the back of the mounting surface 72 at the same time, the interval of the third triangular rib 79 is about 50mm, and the height is about 10mm lower than the edge of the mounting surface 72. The above ribs are used to improve the three-way stiffness and improve the NVH performance.

[0057] In an alternative embodiment, the rear coil spring mounting area 8 comprises a left rear coil spring mounting surface 80 integrally formed on the left side sill 4 and a right rear coil spring mounting surface 81 integrally formed on the right side sill 5; the left side sill 4 is located above the left rear coil spring mounting surface 80 and the right side sill 5 is located above the right rear coil spring mounting surface 81, and a vertical support rib 43 is integrally formed on the left side sill 4 and the right side sill 5; the left side sill 4 is provided with a longitudinal reinforcing rib 82 on both sides of the left rear coil spring mounting surface 80 along the length direction of the vehicle body, and the right side sill 5 is provided with a longitudinal reinforcing rib 82 on both sides of the right rear coil spring mounting surface 81 along the length direction of the vehicle body.

[0058] In addition, as shown in Figure 4 the left rear coil spring mounting surface 80 in the embodiment of the present application is provided with a longitudinal reinforcing rib 82 extending to the first support longitudinal rib 62 of the first frame mounting column 60 at the front portion, and a longitudinal reinforcing rib 82 extending to the third frame mounting column 90 at the rear portion; the right rear coil spring mounting surface 81 is provided with a longitudinal reinforcing rib 82 extending to the first support longitudinal rib 62 of the second frame mounting column 60 at the front portion, and a longitudinal reinforcing rib 82 extending to the fourth frame mounting column 91 at the rear portion, so that the rear subframe front mounting area 6 and the rear coil spring mounting area 8 share the reinforcing ribs, and the support strength along the length direction of the vehicle body is improved.

[0059] Meanwhile, please refer to the accompanying Figure 3 and the accompanying Figure 4 , the cross rib of the rear cross beam 3 extends to the left rear coil spring mounting surface 80 and the right rear coil spring mounting surface 81, so as to provide the radial rigidity support.

[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated rear floor frame assembly, characterized in that: include: One-piece cast aluminum rear floor; A front crossbeam, a middle crossbeam and a rear crossbeam integrally formed of cast aluminum on the rear floor, wherein the front crossbeam, the middle crossbeam and the rear crossbeam are sequentially arranged along the length direction of the rear floor; A left longitudinal beam and a right longitudinal beam integrally formed of cast aluminum on the rear floor, wherein the left longitudinal beam and the right longitudinal beam are respectively arranged on both sides of the rear floor in a one-to-one correspondence along the width direction; The front cross beam, the middle cross beam, the rear cross beam, the left longitudinal beam and the right longitudinal beam are all integrally cast with reinforcing ribs.

2. The integrated rear floor frame assembly according to claim 1, characterized in that: The left longitudinal beam and the right longitudinal beam are integrally formed with a rear subframe front mounting area, a rear shock absorber mounting area, a rear coil spring mounting area, and a rear subframe rear mounting area in sequence along the length direction; The front mounting area of ​​the rear subframe, the rear shock absorber mounting area, the rear coil spring mounting area and the rear mounting area of ​​the rear subframe are all integrally formed with the reinforcing ribs.

3. The integrated rear floor frame assembly according to claim 1, characterized in that: The straight length of the front crossbeam in the height direction is greater than 70 mm, and the straight length in the length direction is greater than 60 mm; The straight length of the middle crossbeam in the height direction is greater than 70 mm, and the straight length in the length direction is greater than 160 mm; The straight length of the rear crossbeam in the height direction is greater than 70 mm, and the straight length in the length direction is greater than 110 mm; The straight length of the left longitudinal beam and the right longitudinal beam along the height direction is greater than 120 mm, and the straight length along the width direction is greater than 80 mm.

4. The integrated rear floor frame assembly according to claim 1, characterized in that: The thickness of the rear floor in the height direction is greater than 3 mm; The portion of the rear floor between the front cross beam and the middle cross beam is provided with a first reinforcing rib, a second reinforcing rib and a third reinforcing rib extending in the length direction, wherein the first reinforcing rib, the second reinforcing rib and the third reinforcing rib are arranged in sequence in the width direction; The straight line lengths of the first reinforcing rib, the second reinforcing rib, and the third reinforcing rib along the height direction are all greater than or equal to 6 mm, and the straight line lengths along the width direction are greater than 150 mm.

5. The integrated rear floor frame assembly according to claim 2, characterized in that: The upper portion of the front crossbeam is integrally formed with at least two seat mounting supports arranged in a width direction; Reinforcement transverse ribs connected between adjacent seat mounting supports are integrally formed on the front crossbeam, and reinforcement longitudinal ribs are provided on the front crossbeam at the front and rear sides of a single seat mounting support.

6. The integrated rear floor frame assembly according to claim 5, characterized in that: The lower portion of the front cross beam is integrally formed with at least two front transverse ribs extending in the length direction, the lower portion of the middle cross beam is integrally formed with at least two middle transverse ribs extending in the length direction, and the lower portion of the rear cross beam is integrally formed with a rear transverse rib; The front transverse rib is provided with a short supporting rib in the area below the seat mounting support, and the middle transverse rib and the rear transverse rib are respectively provided with a first supporting oblique rib and a second supporting oblique rib in a one-to-one correspondence.

7. The integrated rear floor frame assembly according to claim 6, characterized in that: The front mounting area of ​​the rear subframe includes a first frame mounting post and a second frame mounting post respectively integrally formed on the left longitudinal beam and the right longitudinal beam and located on an extension line of the middle cross beam; The rear mounting area of ​​the rear subframe includes a third frame mounting column and a fourth frame mounting column which are respectively integrally formed on the left longitudinal beam and the right longitudinal beam and are located on the extension line of the rear cross beam.

8. The integrated rear floor frame assembly according to claim 7, characterized in that: The rear shock absorber mounting area includes a left connecting frame and a right connecting frame connected to the vehicle body, the left connecting frame is integrally formed with the left longitudinal beam, and the right connecting frame is integrally formed with the right longitudinal beam; The left longitudinal beam located below the left connecting frame and the right longitudinal beam located below the right connecting frame are both provided with at least two vibration-damping vertical ribs arranged along the length direction of the vehicle body, and vibration-damping transverse ribs are connected between adjacent vibration-damping vertical ribs.

9. The integrated rear floor frame assembly according to claim 8, characterized in that: The rear coil spring installation area includes a left rear coil spring installation surface integrally formed on the left longitudinal beam and a right rear coil spring installation surface integrally formed on the right longitudinal beam; Vertical supporting ribs are integrally formed in the cavities of the left longitudinal beam located above the left rear coil spring installation surface and the right longitudinal beam located above the right rear coil spring installation surface.

10. A vehicle, characterized in that: The invention comprises the integrated rear floor frame assembly according to any one of claims 1 to 9.

Images