Rear floor longitudinal beam and vehicle

Abstract

The utility model provides a rear floor longitudinal beam and a vehicle, and relates to the technical field of vehicle parts, the rear floor longitudinal beam comprises a rear floor longitudinal beam body and a reinforcing structure arranged in the rear floor longitudinal beam body, a rear floor longitudinal beam cavity extending in the front-back direction of the vehicle is formed in the rear floor longitudinal beam body, and the reinforcing structure is arranged in the rear floor longitudinal beam cavity. The reinforcing structure is located in the rear floor longitudinal beam cavity and comprises a plurality of transverse reinforcing pieces and a plurality of longitudinal reinforcing pieces, and the transverse reinforcing pieces and the longitudinal reinforcing pieces are sequentially arranged in a staggered mode in the front-back direction of the vehicle. According to the rear floor longitudinal beam, the left-right direction and the front-back direction of the rear floor longitudinal beam can be reinforced, the longitudinal bearing capacity of the rear floor longitudinal beam can be improved, when the rear floor longitudinal beam is applied to a rear floor assembly, the overall installation strength of the rear floor assembly can be improved, and the dynamic stiffness and driving comfort of a vehicle can be improved. And the impact resistance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a rear floor longitudinal beam. At the same time, the utility model also relates to a vehicle using the rear floor longitudinal beam. Background Art

[0002] The rear floor rail is a crucial component of the vehicle's body structure. Located at the rear of the vehicle, it typically forms the rear structure along with the rear floor. Its primary function is to support the seats and passengers, and it plays a key role in passenger compartment sealing, vibration, and noise control. It impacts the vehicle's stiffness and handling performance, and serves as a key force transmission path in rear-end collisions, making it crucial for passenger compartment protection.

[0003] In the existing rear floor longitudinal beam structure, a longitudinal beam reinforcement plate is generally arranged in the rear floor longitudinal beam cavity. The longitudinal beam reinforcement plate adopts a transverse integral reinforcement plate as reinforcement, which has insufficient longitudinal load-bearing capacity, resulting in low installation strength of the entire rear floor longitudinal beam, poor vehicle dynamic stiffness, and affecting vehicle driving comfort. Utility Model Content

[0004] In view of this, the present invention aims to provide a rear floor longitudinal beam to improve the performance of the rear floor longitudinal beam.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A rear floor longitudinal beam comprises a rear floor longitudinal beam body and a reinforcement structure provided in the rear floor longitudinal beam body;

[0007] A rear floor longitudinal beam cavity extending in the front-rear direction of the vehicle is formed in the rear floor longitudinal beam body;

[0008] The reinforcement structure is located in the cavity of the rear floor longitudinal beam and includes multiple transverse reinforcements and multiple longitudinal reinforcements. The transverse reinforcements and the longitudinal reinforcements are arranged alternately in sequence along the front-to-rear direction of the vehicle. The transverse reinforcements extend along the left-right direction of the vehicle, and the longitudinal reinforcements extend along the front-to-rear direction of the vehicle.

[0009] Furthermore, the transverse reinforcement includes a rear shock absorber inner support plate, and the rear shock absorber inner support plate is arranged in a front-to-rear direction of the vehicle corresponding to the shock absorber spring mounting point;

[0010] The upper portion of the rear shock absorber inner support plate is connected to the top wall of the rear floor longitudinal beam cavity, and the lower portion of the rear shock absorber inner support plate is connected to the bottom wall of the rear floor longitudinal beam cavity.

[0011] Further, the inner support plate of the rear shock absorber includes a support plate main body with a "C"-shaped cross-section. The support plate main body includes two first cross plates arranged at a distance, and a first longitudinal plate connected between the two first cross plates;

[0012] A middle section reinforcement plate of the rear floor longitudinal beam is provided in the cavity of the rear floor longitudinal beam. The middle section reinforcement plate of the rear floor longitudinal beam is correspondingly arranged in the front-back direction of the vehicle with the shock absorber spring mounting point, and is connected to the bottom wall of the cavity of the rear floor longitudinal beam;

[0013] Two first transverse flanges and a first longitudinal flange that are bent upward are provided on the middle section reinforcement plate of the rear floor longitudinal beam. The two first transverse flanges are respectively lapped and connected with the two first cross plates, and the first longitudinal flange is lapped and connected with the first longitudinal plate.

[0014] Further, a first flange and a second flange are provided on each of the first cross plates. Each of the first cross plates is connected to the top wall of the cavity of the rear floor longitudinal beam through the first flange, and each of the first cross plates is connected to the inner side wall of the cavity of the rear floor longitudinal beam through the second flange.

[0015] Further, the transverse reinforcement member further includes a front mounting reinforcement plate of the rear subframe. The front mounting reinforcement plate of the rear subframe is correspondingly arranged in the front-back direction of the vehicle with the middle cross beam of the rear floor;

[0016] Front mounting reinforcement plate flanges are respectively provided around the front mounting reinforcement plate of the rear subframe. The front mounting reinforcement plate of the rear subframe is respectively connected to the top wall, bottom wall, inner side wall and outer side wall of the cavity of the rear floor longitudinal beam through the front mounting reinforcement plate flanges around it.

[0017] Further, a front mounting nut of the rear subframe is provided in the cavity of the rear floor longitudinal beam. One side of the front mounting reinforcement plate of the rear subframe is connected to the front mounting nut of the rear subframe;

[0018] A front nut support plate of the rear subframe for supporting the front mounting nut of the rear subframe is provided in the cavity of the rear floor longitudinal beam. The front nut support plate of the rear subframe is connected to the bottom wall of the cavity of the rear floor longitudinal beam, and part of the front nut support plate of the rear subframe and the front mounting reinforcement plate flange connected to the bottom wall are lapped and connected.

[0019] Further, the longitudinal reinforcement member includes a rear mounting reinforcement plate of the rear subframe. The rear mounting reinforcement plate of the rear subframe is correspondingly arranged in the front-back direction of the vehicle with the rear cross beam of the rear floor, and the rear mounting reinforcement plate of the rear subframe is located in the middle of the cavity of the rear floor longitudinal beam in the left-right direction of the vehicle;

[0020] A plurality of first reinforcing ribs are provided on the rear mounting reinforcement plate of the rear subframe. The plurality of first reinforcing ribs are spaced apart along the front-rear direction of the vehicle, and each of the first reinforcing ribs extends along the up-down direction of the vehicle.

[0021] Furthermore, the upper and lower sides of the rear mounting reinforcement plate of the rear subframe are respectively provided with a first upper flange and a first lower flange, the rear mounting reinforcement plate of the rear subframe is connected to the top wall of the rear floor longitudinal beam cavity through the first upper flange, and the rear mounting reinforcement plate of the rear subframe is connected to the bottom wall of the rear floor longitudinal beam cavity through the first lower flange.

[0022] Furthermore, the longitudinal reinforcement also includes a rear floor longitudinal beam front reinforcement plate located between the rear subframe front mounting reinforcement plate and the rear shock absorber inner support plate, and the rear floor longitudinal beam front reinforcement plate is located in the middle of the rear floor longitudinal beam cavity in the left-right direction of the vehicle;

[0023] The rear floor longitudinal beam front reinforcement plate is bent along the bending direction of the rear floor longitudinal beam body, and a second upper flange and a second lower flange are respectively provided on the upper and lower sides of the rear floor longitudinal beam front reinforcement plate. The rear floor longitudinal beam front reinforcement plate is connected to the top wall of the rear floor longitudinal beam cavity through the second upper flange, and the rear floor longitudinal beam front reinforcement plate is connected to the bottom wall of the rear floor longitudinal beam cavity through the second lower flange.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The rear floor longitudinal beam, the transverse reinforcement members and the longitudinal reinforcement members described in the utility model are staggered in the front-to-rear direction of the vehicle, and respectively reinforce the rear floor longitudinal beam in the left-right direction and the front-to-rear direction, which is beneficial to improving the longitudinal load-bearing capacity of the rear floor longitudinal beam, can improve the overall installation strength of the rear floor assembly, and is beneficial to improving the dynamic rigidity and driving comfort of the vehicle, and is also beneficial to improving the impact resistance performance.

[0026] Furthermore, the rear shock absorber inner support plate extends in the left-right direction of the vehicle and is supported between the top and bottom walls of the rear floor rail cavity, reinforcing the rear floor rail in the vertical direction of the vehicle. This effectively strengthens the shock absorber spring mounting points and improves the dynamic stiffness of the rear floor assembly. Furthermore, a mid-section reinforcement plate is installed within the rear floor rail cavity, with a defined connection between the support plate body and the rear floor rail body, further enhancing the reinforcing effect of the rear shock absorber inner support plate on the rear floor rail body.

[0027] Furthermore, the rear subframe front mounting reinforcement plate is equipped with front mounting reinforcement plate flanges around its perimeter, connecting to the top, bottom, inner, and outer walls of the rear floor longitudinal beam cavity. This effectively reinforces the connection between the rear floor longitudinal beam body and the rear floor center cross member. Application to the rear floor assembly can further improve the dynamic stiffness of the rear floor assembly. One side of the rear subframe front mounting reinforcement plate is connected to the rear subframe front mounting nut, allowing the rear subframe front mounting reinforcement plate to simultaneously strengthen the rear subframe front mounting structure, thereby improving the dynamic stiffness of the entire vehicle.

[0028] Furthermore, the rear subframe rear mounting reinforcement plate is provided with a plurality of first reinforcing ribs, which not only strengthen the longitudinal structure of the rear floor longitudinal beam but also effectively reinforce the rear floor longitudinal beam body in the vertical direction of the vehicle. The rear subframe rear mounting reinforcement plate is connected to the rear floor longitudinal beam body via the first upper flange and the first lower flange, providing a highly reliable and stable connection, thereby enhancing the reinforcing effect of the rear subframe rear mounting reinforcement plate on the rear floor longitudinal beam body.

[0029] By bending the front reinforcement plate of the rear floor longitudinal beam in the bending direction of the rear floor longitudinal beam body, the bent portion of the rear floor longitudinal beam body can be better reinforced. The front reinforcement plate of the rear floor longitudinal beam is limited to be connected to the rear floor longitudinal beam body through the second upper side flange and the second lower side flange. The reliability and stability of the connection between the two are high, which can further improve the reinforcing effect of the rear subframe rear-mounted reinforcement plate on the rear floor longitudinal beam body.

[0030] Another object of the present invention is to provide a vehicle, wherein the rear floor assembly of the vehicle includes the rear floor longitudinal beam as described above.

[0031] The vehicle described in the utility model can improve the longitudinal load-bearing capacity of the rear floor assembly and the overall installation strength of the rear floor assembly by applying the above-mentioned rear floor longitudinal beam in its rear floor assembly, which is beneficial to improving the dynamic rigidity and driving comfort of the vehicle and also helps to improve the impact resistance performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 This is a schematic structural diagram of the rear floor longitudinal beam according to the first embodiment of the present invention;

[0034] Figure 2 This is a structural schematic diagram of the rear subframe front mounting reinforcement plate according to the first embodiment of the present invention being assembled on the longitudinal beam body;

[0035] Figure 3 This is another structural schematic diagram of the rear subframe front mounting reinforcement plate according to the first embodiment of the present invention being assembled on the longitudinal beam body;

[0036] Figure 4 This is a structural diagram of the front mounting reinforcement plate of the rear subframe according to the first embodiment of the present invention;

[0037] Figure 5 Based Figure 4 Schematic diagram of the structure from another perspective;

[0038] Figure 6 This is a structural schematic diagram of the front reinforcement plate of the rear floor longitudinal beam according to the first embodiment of the present invention;

[0039] Figure 7 This is a structural schematic diagram of the rear shock absorber inner support plate assembled on the longitudinal beam body according to the first embodiment of the present invention;

[0040] Figure 8 This is another structural schematic diagram of the rear shock absorber inner support plate according to the first embodiment of the present invention being assembled on the longitudinal beam body;

[0041] Figure 9 This is an assembly diagram of the rear shock absorber inner support plate and the rear floor longitudinal beam middle section reinforcement plate according to the first embodiment of the present invention;

[0042] Figure 10 This is a schematic structural diagram of the middle section reinforcement plate of the rear floor longitudinal beam according to the first embodiment of the present invention;

[0043] Figure 11 This is a structural schematic diagram of the rear subframe rear mounting reinforcement plate according to Example 1 of the present invention.

[0044] Description of reference numerals:

[0045] 1. Rear floor longitudinal member body; 2. Transverse reinforcement; 3. Longitudinal reinforcement; 4. Rear floor longitudinal member middle section reinforcement plate; 5. Shock absorber spring mounting point; 6. Rear subframe front mounting nut; 7. Rear subframe front nut support plate;

[0046] 101. Rear floor longitudinal beam body; 102. Rear floor longitudinal beam cover; 103. Rear floor longitudinal beam cavity;

[0047] 1031, bottom wall; 1032, top wall; 1033, inner wall;

[0048] 201. Rear shock absorber inner support plate; 202. Rear subframe front mounting reinforcement plate;

[0049] 2011, support plate body; 2012, first flange; 2013, second flange;

[0050] 20111, first horizontal board; 20112, first vertical board;

[0051] 2021. Front installation reinforcement plate flange;

[0052] 20211, first reinforcing plate flange; 20212, second reinforcing plate flange; 20213, third reinforcing plate flange; 20214, fourth reinforcing plate flange;

[0053] 301, rear subframe rear mounting reinforcement plate; 302, rear floor longitudinal beam front reinforcement plate;

[0054] 3011, first reinforcing rib; 3012, first upper flange; 3013, first lower flange;

[0055] 3021, second upper side flange; 3022, second lower side flange;

[0056] 401, first transverse flange; 402, first longitudinal flange;

[0057] 701. Extension. DETAILED DESCRIPTION

[0058] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0059] In the description of this utility model, it should be noted that the orientations or positional relationships shown in the accompanying drawings are merely for the purpose of facilitating the description of this utility model and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate 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.

[0060] Additionally, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, these terms may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0061] For the convenience of description and introduction of related contents, this embodiment is Figure 1 The arrows in the figure show the directional words used in the embodiment, such as "front, back, left, right, up, down". Specifically, Figure 1The "left and right" indicated by the arrow in the figure are also the "width direction and transverse direction" described in this embodiment, the "front and back" are also the "length direction and longitudinal direction" described in this embodiment, and the "up and down" are also the "height direction" described in this embodiment.

[0062] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0063] Embodiment 1

[0064] This embodiment relates to a rear floor longitudinal beam. By improving its structure, its longitudinal bearing capacity can be enhanced, the overall installation strength of the rear floor assembly can be increased, which is beneficial to improving the dynamic stiffness and driving comfort of the vehicle, and also beneficial to improving the impact resistance performance of the vehicle.

[0065] Based on the above design concept, an exemplary structure of the rear floor longitudinal beam in this embodiment is as Figure 1 shown in the figure. In terms of the overall structure, the rear floor longitudinal beam in this embodiment mainly includes a rear floor longitudinal beam body 1 and a strengthening structure provided inside the rear floor longitudinal beam body 1. A rear floor longitudinal beam cavity 103 extending in the front-back direction of the vehicle is formed inside the rear floor longitudinal beam body 1, and the strengthening structure is located inside the rear floor longitudinal beam cavity 103.

[0066] Among them, the structure of the rear floor longitudinal beam body 1 can refer to the existing structure, which mainly includes a rear floor longitudinal beam main body 101 and a rear floor longitudinal beam cover plate 102. The rear floor longitudinal beam main body 101 and the rear floor longitudinal beam cover plate 102 enclose and form the rear floor longitudinal beam cavity 103 of this embodiment, and the cross-section of the rear floor longitudinal beam cavity 103 is generally in the shape of a "C".

[0067] Here, it should be noted that for the convenience of description, the upper wall portion inside the rear floor longitudinal beam cavity 103 will be referred to as the top wall 1032 hereinafter, the lower wall portion will be referred to as the bottom wall 1031, the inner wall portion will be referred to as the inner side wall 1033, and the outer wall portion will be referred to as the outer side wall. The structure of the outer side wall is not shown in the figure, and the outer side wall is specifically formed on the existing structure of the vehicle, and will not be specifically described in this embodiment.

[0068] In addition, on the vehicle, there are two rear floor longitudinal beams, and the two rear floor longitudinal beams are symmetrically arranged about the center line in the left-right direction of the vehicle. Therefore, the rear floor longitudinal beam on the right side will be taken as an example for description hereinafter.

[0069] In the prior art, there is no connection and support structure between the rear floor longitudinal beam main body 101 and the rear floor longitudinal beam cover plate 102. However, the strengthening structure provided in this embodiment can better strengthen the rear floor longitudinal beam in the up-down direction, left-right direction and front-back direction of the vehicle, so that the rear floor longitudinal beam has better structural strength. When applied to the rear floor assembly of the vehicle, it can improve the dynamic stiffness of the rear floor assembly, and improve the driving comfort and impact resistance of the vehicle.

[0070] Still referring to Figure 1 As shown, the strengthening structure of this embodiment includes a plurality of transverse strengthening members 2 and a plurality of longitudinal strengthening members 3. The transverse strengthening members 2 and the longitudinal strengthening members 3 are arranged alternately in sequence along the front-rear direction of the vehicle. The transverse strengthening members 2 extend along the left-right direction of the vehicle, and can preferably strengthen the rear floor longitudinal beam in the left-right direction of the vehicle. The longitudinal strengthening members 3 extend along the front-rear direction of the vehicle, and can preferably strengthen the rear floor longitudinal beam in the front-rear direction of the vehicle. The transverse strengthening members 2 and the longitudinal strengthening members 3 are arranged alternately in sequence along the front-rear direction of the vehicle, so that the rear floor longitudinal beam has better bearing capacity both in the left-right direction and the front-rear direction of the vehicle.

[0071] It should be noted that in a preferred embodiment, there are two transverse strengthening members 2 and two longitudinal strengthening members 3. Their installation methods and specific arrangement positions in the rear floor longitudinal beam cavity will be described in detail below. It should be understood that the number of the transverse strengthening members 2 and the number of the longitudinal strengthening members 3 can be adjusted according to actual needs, such as one, three, four, etc. respectively, and the number of the transverse strengthening members 2 and the number of the longitudinal strengthening members 3 can also be set to different values.

[0072] As Figure 7 and Figure 8 shown, as a preferred embodiment, the transverse strengthening member 2 includes an inner support plate 201 of the rear shock absorber. The inner support plate 201 of the rear shock absorber is correspondingly arranged with the shock absorber spring mounting point 5 in the front-rear direction of the vehicle. The upper part of the inner support plate 201 of the rear shock absorber is connected to the top wall 1032 of the rear floor longitudinal beam cavity 103, and the lower part of the inner support plate 201 of the rear shock absorber is connected to the bottom wall 1031 of the rear floor longitudinal beam cavity 103.

[0073] The inner support plate 201 of the rear shock absorber arranged in this way, while extending along the left-right direction of the vehicle, is supported between the top wall 1032 and the bottom wall 1031 of the rear floor longitudinal beam cavity, and can strengthen the rear floor longitudinal beam in the up-down direction of the vehicle, so as to preferably strengthen the shock absorber spring mounting point 5 part. When applied to the rear floor assembly, it is beneficial to improve the dynamic stiffness of the rear floor assembly.

[0074] In order to achieve a better strengthening effect, as a preferred embodiment, as Figure 9 shown, the inner support plate 201 of the rear shock absorber includes a support plate main body 2011 with a "C" - shaped cross-section. The support plate main body 2011 includes two first cross plates 20111 arranged at intervals, and a first longitudinal plate 20112 connected between the two first cross plates 20111.

[0075] Among them, the two first horizontal plates 20111 both extend along the left-right direction of the vehicle, and the first longitudinal plate 20112 extends along the front-rear direction of the vehicle. When installed in the rear floor longitudinal beam cavity 103, a cavity is formed between the support plate body 2011 and the inner wall 1033. The cavity extends along the up-down direction of the vehicle, which can better strengthen the shock-absorbing spring installation point 5 of the rear floor longitudinal beam.

[0076] Specifically, the size of each first horizontal plate 20111 in the left-right direction of the vehicle is between 80mm and 90mm, such as 80mm, 85mm, 90mm, etc. The size of the first vertical plate 20112 in the front-back direction of the vehicle is between 62mm and 65mm, such as 62mm, 63mm, 65mm, etc. The sizes of the first horizontal plate 20111 and the first vertical plate 20112 in the up-down direction of the vehicle are both between 100mm and 110mm, such as 100mm, 105mm, 110mm, etc.

[0077] like Figure 8 and Figure 10 As shown, a rear floor longitudinal beam middle section reinforcement plate 4 is provided in the rear floor longitudinal beam cavity 103. The rear floor longitudinal beam middle section reinforcement plate 4 is arranged corresponding to the shock-absorbing spring mounting point 5 in the front-rear direction of the vehicle, and the rear floor longitudinal beam middle section reinforcement plate 4 is connected to the bottom wall 1031 of the rear floor longitudinal beam cavity 103, which can also better reinforce the shock-absorbing spring mounting point 5 of the rear floor longitudinal beam.

[0078] In terms of specific structure, Figure 10 and combined Figure 9 As shown, in the left-right direction of the vehicle, the size of the rear floor longitudinal middle section reinforcement plate 4 is larger than the support plate body 2011. In the front-back direction of the vehicle, the size of the rear floor longitudinal middle section reinforcement plate 4 is also larger than the support plate body 2011. The rear floor longitudinal middle section reinforcement plate 4 is provided with two upwardly bent first transverse flanges 401 and a first longitudinal flange 402. The two first transverse flanges 401 are respectively overlapped and connected to the two first transverse plates 20111, and the first longitudinal flange 402 is overlapped and connected to the first longitudinal plate 20112.

[0079] More specifically, the size of the first transverse flange 401 along the left-right direction of the vehicle and the size of the first longitudinal flange 402 along the front-back direction of the vehicle are both between 38mm and 40mm, such as 38mm, 39mm, 40mm, etc., which is beneficial to improve the connection reliability between the middle section reinforcement plate 4 of the rear floor longitudinal beam and the support plate main body 2011.

[0080] As in this embodiment, an opening is provided on the middle section reinforcement plate 4 of the rear floor longitudinal beam, and the two first transverse flanges 401 and the first longitudinal flange 402 are located at the edges of the opening, so that the middle section reinforcement plate 4 of the rear floor longitudinal beam is light in weight and convenient for connection with the support plate body 2011, thereby being able to better reinforce the shock-absorbing spring installation point 5 of the rear floor longitudinal beam.

[0081] like Figures 7 to 9 As shown, as a preferred embodiment, each first transverse plate 20111 is provided with a first flange 2012 and a second flange 2013, and each first transverse plate 20111 is connected to the top wall 1032 of the rear floor longitudinal beam cavity 103 through the first flange 2012, and each first transverse plate 20111 is connected to the inner wall 1033 of the rear floor longitudinal beam cavity 103 through the second flange 2013, which can improve the structural strength of the support plate 201 in the rear shock absorber itself, help to improve the reliability of the support plate body 2011 fixed in the rear floor longitudinal beam, and can improve the structural reinforcement effect of the support plate 201 in the rear shock absorber on the rear floor longitudinal beam.

[0082] Still refer to Figure 9 and combined Figure 8 As shown, the outer side of the rear floor longitudinal beam middle section reinforcement plate 4 is further provided with a flange, which overlaps the edge of the rear floor longitudinal beam body 101, which is beneficial to improving the stability and reliability of the connection between the rear floor longitudinal beam middle section reinforcement plate 4 and the rear floor longitudinal beam body 101.

[0083] As shown in the above structure, the rear floor longitudinal beam middle section reinforcement plate 4 is set in the rear floor longitudinal beam cavity 103, and the connection method between the support plate main body 2011 and the rear floor longitudinal beam body 1 is limited, which can further improve the reinforcement effect of the rear shock absorber inner support plate 201 on the rear floor longitudinal beam body 1.

[0084] It should also be noted that in order to further improve the structural strength of the inner support plate 201 of the rear shock absorber itself, each first horizontal plate 20111 is provided with a reinforcing rib, and the reinforcing ribs are preferably multiple, and the multiple reinforcing ribs are arranged at intervals in the upper and lower directions of the vehicle, and each reinforcing rib extends along the left and right directions of the vehicle, which can better improve the structural strength of the inner support plate 201 of the rear shock absorber itself.

[0085] It should be understood that, as needed, reinforcing ribs may also be provided on the first longitudinal plate 20112. In this embodiment, process holes are also provided on the first longitudinal plate 20112. The process holes may be provided on the first longitudinal plate 20112 or on the first transverse plate 20111. The arrangement is based on actual needs and is not specifically limited in this embodiment.

[0086] like Figures 2 to 5As shown, as a preferred embodiment, the transverse reinforcement 2 further includes a rear subframe front mounting reinforcement plate 202. The rear subframe front mounting reinforcement plate 202 is arranged in the front-to-rear direction of the vehicle corresponding to the rear floor center cross member to better reinforce the connection between the rear floor longitudinal beam and the rear floor center cross member.

[0087] Preferably, front mounting reinforcement plate flanges 2021 are respectively provided on the four sides of the rear subframe front mounting reinforcement plate 202. The rear subframe front mounting reinforcement plate 202 is respectively connected to the top wall 1032, the bottom wall 1031, the inner wall 1033 and the outer wall of the rear floor longitudinal beam cavity 103 through the front mounting reinforcement plate flanges 2021 on the four sides. This not only makes the structural strength of the rear subframe front mounting reinforcement plate 202 itself higher, but also helps to improve the structural reinforcement effect of the rear subframe front mounting reinforcement plate 202 on the rear floor longitudinal beam.

[0088] For the convenience of description, Figure 4 and Figure 5 As shown in , in this embodiment, the front mounting reinforcement plate flanges 2021 on all four sides are respectively referred to as the first reinforcement plate flange 20211 , the second reinforcement plate flange 20212 , the third reinforcement plate flange 20213 and the fourth reinforcement plate flange 20214 .

[0089] Combine Figure 3 As shown, the rear subframe front mounting reinforcement plate 202 extends roughly in the left-right direction of the vehicle, and is welded to the top wall 1032 through a first reinforcement plate flange 20211. In this embodiment, it is specifically connected to the rear floor longitudinal beam cover plate 102. The rear subframe front mounting reinforcement plate 202 is welded to the bottom wall 1031 through a second reinforcement plate flange 20212, and is specifically connected to the rear floor longitudinal beam body 101. The rear subframe front mounting reinforcement plate 202 is welded to the inner side wall 1033 through a third reinforcement plate flange 20213, and is specifically connected to the inner wall of the rear floor longitudinal beam body 101. The rear subframe front mounting reinforcement plate 202 is welded to the outer side wall (not shown in the figure) through a fourth reinforcement plate flange 20214.

[0090] As shown in the above structure, front mounting reinforcement plate flanges 2021 are provided around the front mounting reinforcement plate 202 of the rear subframe, respectively connecting the top wall 1032, bottom wall 1031, inner wall 1033 and outer wall of the rear floor longitudinal beam cavity 103. This can effectively strengthen the connection between the rear floor longitudinal beam body 1 and the rear floor center cross beam. When used in the rear floor assembly, it can further improve the dynamic stiffness of the rear floor assembly.

[0091] Still refer to Figure 2 and Figure 4As shown, as a preferred embodiment, a rear subframe front mounting nut 6 is provided in the rear floor longitudinal beam cavity 103. The rear subframe front mounting nut 6 is mounted on the bottom wall 1031 and extends along the up-down direction of the vehicle, constituting a front mounting point of the rear subframe.

[0092] In a preferred embodiment, one side of the rear subframe front mounting reinforcement plate 202 is connected to the rear subframe front mounting nut 6. Specifically, the rear side of the rear subframe front mounting reinforcement plate 202 is connected to the rear subframe front mounting nut 6, so that the rear subframe front mounting reinforcement plate 202 can also strengthen the mounting structure of the front portion of the rear subframe, thereby improving the dynamic stiffness of the entire vehicle.

[0093] A rear subframe front nut support plate 7 supporting the rear subframe front mounting nut 6 is provided in the rear floor longitudinal beam cavity 103. The rear subframe front nut support plate 7 is connected to the bottom wall 1031 of the rear floor longitudinal beam cavity 103, and a portion of the rear subframe front nut support plate 7 is overlapped and connected to the front mounting reinforcement plate flange 2021 connected to the bottom wall 1031.

[0094] Continue to refer to Figure 4 As in this embodiment, the rear subframe front nut support plate 7 has an extension portion 701 extending between the second reinforcing plate flange 20212 and the bottom wall 1031, and preferably, there are two extension portions 701, which are arranged at intervals along the left-right direction of the vehicle, and the portion of the second reinforcing plate flange 20212 corresponding to the extension portion 701 is partially raised upward, so that the second reinforcing plate flange 20212, the extension portion 701 and the bottom wall 1031 can be welded together, which can effectively improve the structural strength of the connection between the rear floor longitudinal beam and the rear floor center cross beam.

[0095] It should be noted that, in the above structure, the rear side of the rear subframe front mounting reinforcement plate 202 is connected to the rear subframe front mounting nut 6. It should be understood that the front side of the rear subframe front mounting reinforcement plate 202 can also be connected to the rear subframe front mounting nut 6.

[0096] like Figure 1 and Figure 11 As shown, as a preferred embodiment, the longitudinal reinforcement 3 includes a rear subframe rear mounting reinforcement plate 301. This plate extends entirely along the vehicle's fore-aft direction, effectively enhancing the longitudinal load-bearing capacity of the rear floor longitudinal members. This plate is positioned in alignment with the rear floor rear cross member in the fore-aft direction of the vehicle, effectively enhancing the structural strength of the connection between the rear floor longitudinal members and the rear floor rear cross member.

[0097] The rear subframe rear mounting reinforcement plate 301 is located in the middle of the rear floor longitudinal beam cavity 103 in the left-right direction of the vehicle. In this embodiment, the distance between the rear subframe rear mounting reinforcement plate 301 and the inner side wall 1033 and the distance between the rear subframe rear mounting reinforcement plate 301 and the outer side wall are both between 65 mm and 70 mm, and can be 65 mm, 68 mm, 70 mm, etc., which can effectively strengthen the rear floor longitudinal beam.

[0098] like Figure 11 In the figure, a plurality of first reinforcing ribs 3011 are provided on the rear subframe rear mounting reinforcement plate 301. The plurality of first reinforcing ribs 3011 are arranged at intervals along the front-to-rear direction of the vehicle. Each first reinforcing rib 3011 extends along the up-down direction of the vehicle. Each first reinforcing rib 3011 is formed by a portion of the rear subframe rear mounting reinforcement plate 301 protruding to one side, which is convenient for processing.

[0099] In this embodiment, five first reinforcing ribs 3011 are provided. It should be understood that the number of first reinforcing ribs 3011 can be set to five or other values, such as three, four, or six. The height of each first reinforcing rib 3011 in the vertical direction of the vehicle is between 68 mm and 140 mm, such as 68 mm, 80 mm, 90 mm, 110 mm, 140 mm, etc., and can be set according to actual needs.

[0100] It should be noted that, in this embodiment, the rear subframe rear mounting reinforcement plate 301 is provided with a plurality of first reinforcement ribs 3011 , which can strengthen the longitudinal structure of the rear floor longitudinal beam while better reinforcing the rear floor longitudinal beam body 1 in the vertical direction of the vehicle.

[0101] Continue to refer to Figure 11 As shown, as a preferred embodiment, a first upper flange 3012 and a first lower flange 3013 are respectively provided on the upper and lower sides of the rear subframe rear mounting reinforcement plate 301. The rear subframe rear mounting reinforcement plate 301 is connected to the top wall 1032 of the rear floor longitudinal beam cavity 103 through the first upper flange 3012, and is connected to the bottom wall 1031 of the rear floor longitudinal beam cavity 103 through the first lower flange 3013. This makes the reliability and stability of the connection between the rear subframe rear mounting reinforcement plate 301 and the rear floor longitudinal beam body 1 higher, and can improve the reinforcement effect of the rear subframe rear mounting reinforcement plate 301 on the rear floor longitudinal beam body 1.

[0102] like Figure 1 and Figure 6As shown, as a preferred embodiment, the longitudinal reinforcement 3 further includes a rear floor longitudinal beam front reinforcement plate 302 located between the rear subframe front mounting reinforcement plate 202 and the rear shock absorber inner support plate 201. The rear floor longitudinal beam front reinforcement plate 302 extends along the front-to-back direction of the vehicle, and the rear subframe front mounting reinforcement plate 202 is located in the middle of the rear floor longitudinal beam cavity 103 in the left-to-right direction of the vehicle, which can effectively improve the longitudinal load-bearing capacity of the rear floor longitudinal beam.

[0103] Continue to refer to Figure 6 As shown, the rear floor rail front reinforcement plate 302 is bent in the direction following the curvature of the floor rail body 1. In this embodiment, the angle α between the front and rear portions of the rear floor rail front reinforcement plate 302 is between 150° and 175°. The rear floor rail front reinforcement plate 302 is supported between the top wall 1032 and the bottom wall 1031, effectively reinforcing the rear floor rail body 1 in the vertical direction of the vehicle. Bending the rear floor rail front reinforcement plate 302 in the direction following the curvature of the floor rail body 1 effectively reinforces the curved portion of the rear floor rail body 1.

[0104] A second upper flange 3021 and a second lower flange 3022 are respectively provided on the upper and lower sides of the rear floor longitudinal beam front reinforcement plate 302. The rear floor longitudinal beam front reinforcement plate 302 is connected to the top wall 1032 of the rear floor longitudinal beam cavity 103 via the second upper flange 3021, and the rear floor longitudinal beam front reinforcement plate 302 is connected to the bottom wall 1031 of the rear floor longitudinal beam cavity 103 via the second lower flange 3022. This makes the reliability and stability of the connection between the rear subframe front mounting reinforcement plate 202 and the rear floor longitudinal beam body 1 higher, and can improve the reinforcement effect of the rear subframe front mounting reinforcement plate 202 on the rear floor longitudinal beam body 1.

[0105] The rear floor longitudinal members, transverse reinforcements 2, and longitudinal reinforcements 3 of this embodiment are staggered along the vehicle's fore-and-aft direction, respectively reinforcing the rear floor longitudinal members in the left-right and fore-and-aft directions. This improves the longitudinal load-bearing capacity of the rear floor longitudinal members, enhances the overall mounting strength of the rear floor assembly, improves the vehicle's dynamic stiffness and driving comfort, and also enhances crashworthiness.

[0106] Example 2

[0107] This embodiment relates to a vehicle, wherein the rear floor assembly of the vehicle includes the above-mentioned rear floor longitudinal beam.

[0108] The vehicle of this embodiment has the same beneficial effects as the aforementioned rear floor longitudinal beam relative to the prior art, and will not be described in detail here.

[0109] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rear floor longitudinal beam, characterized in that: It includes a rear floor longitudinal beam body (1) and a strengthening structure provided inside the rear floor longitudinal beam body (1); A rear floor longitudinal beam cavity (103) extending in the front-rear direction of the vehicle is formed inside the rear floor longitudinal beam body (1); The strengthening structure is located inside the rear floor longitudinal beam cavity (103) and includes a plurality of transverse strengthening members (2) and a plurality of longitudinal strengthening members (3). The transverse strengthening members (2) and the longitudinal strengthening members (3) are arranged alternately in sequence in the front-rear direction of the vehicle. The transverse strengthening members (2) extend in the left-right direction of the vehicle, and the longitudinal strengthening members extend in the front-rear direction of the vehicle.

2. The rear floor longitudinal beam according to claim 1, characterized in that: The transverse strengthening member (2) includes an inner support plate for the rear shock absorber (201), and the inner support plate for the rear shock absorber (201) is correspondingly arranged in the front-rear direction of the vehicle with the shock absorber spring mounting point (5); The upper part of the inner support plate for the rear shock absorber (201) is connected to the top wall (1032) of the rear floor longitudinal beam cavity (103), and the lower part of the inner support plate for the rear shock absorber (201) is connected to the bottom wall (1031) of the rear floor longitudinal beam cavity (103) of the rear floor longitudinal beam.

3. The rear floor longitudinal beam according to claim 2, characterized in that: The inner support plate for the rear shock absorber (201) includes a support plate main body (2011) with a "C" - shaped cross-section. The support plate main body (2011) includes two first transverse plates (20111) arranged at intervals, and a first longitudinal plate (20112) connected between the two first transverse plates (20111); A middle section strengthening plate for the rear floor longitudinal beam (4) is provided inside the rear floor longitudinal beam cavity (103). The middle section strengthening plate for the rear floor longitudinal beam (4) is correspondingly arranged in the front-rear direction of the vehicle with the shock absorber spring mounting point (5), and is connected to the bottom wall (1031) of the rear floor longitudinal beam cavity (103); Two first transverse flanges (401) and a first longitudinal flange (402) that are bent upward are provided on the middle section strengthening plate for the rear floor longitudinal beam (4). The two first transverse flanges (401) are respectively lapped and connected with the two first transverse plates (20111), and the first longitudinal flange (402) is lapped and connected with the first longitudinal plate (20112).

4. The rear floor longitudinal beam according to claim 3, characterized in that: A first flange (2012) and a second flange (2013) are provided on each of the first transverse plates (20111). Each of the first transverse plates (20111) is connected to the top wall (1032) of the rear floor longitudinal beam cavity (103) through the first flange (2012), and each of the first transverse plates (20111) is connected to the inner side wall (1033) of the rear floor longitudinal beam cavity (103) through the second flange (2013).

5. The rear floor longitudinal beam according to any one of claims 2 - 4, characterized in that: The transverse reinforcement member (2) further includes a rear subframe front mounting reinforcement plate (202), wherein the rear subframe front mounting reinforcement plate (202) is arranged in correspondence with the rear floor middle crossbeam in the front-rear direction of the vehicle; Front mounting reinforcement plate flanges (2021) are respectively provided on the four sides of the front mounting reinforcement plate (202) of the rear subframe, and the front mounting reinforcement plate (202) of the rear subframe is respectively connected to the top wall (1032), the bottom wall (1031), the inner side wall (1033) and the outer side wall of the rear floor longitudinal beam cavity (103) through the front mounting reinforcement plate flanges (2021) on the four sides.

6. The rear floor longitudinal member according to claim 5, characterized in that: A rear sub-frame front mounting nut (6) is provided in the rear floor longitudinal beam cavity (103), and one side of the rear sub-frame front mounting reinforcement plate (202) is connected to the rear sub-frame front mounting nut (6); A rear subframe front nut support plate (7) supporting the rear subframe front mounting nut (6) is provided in the rear floor longitudinal beam cavity (103); the rear subframe front nut support plate (7) is connected to the bottom wall (1031) of the rear floor longitudinal beam cavity (103); and a portion of the rear subframe front nut support plate (7) is overlapped and connected to the front mounting reinforcement plate flange (2021) connected to the bottom wall (1031).

7. The rear floor longitudinal member according to claim 5, characterized in that: The longitudinal reinforcement (3) includes a rear subframe rear mounting reinforcement plate (301), the rear subframe rear mounting reinforcement plate (301) is arranged corresponding to the rear floor rear cross beam in the front-rear direction of the vehicle, and the rear subframe rear mounting reinforcement plate (301) is located in the middle of the rear floor longitudinal beam cavity in the left-right direction of the vehicle; The rear subframe rear mounting reinforcement plate (301) is provided with a plurality of first reinforcement ribs (3011), the plurality of first reinforcement ribs (3011) are spaced apart along the front-rear direction of the vehicle, and each first reinforcement rib (3011) extends along the up-down direction of the vehicle.

8. The rear floor longitudinal member according to claim 7, characterized in that: The upper and lower sides of the rear sub-frame rear mounting reinforcement plate (301) are respectively provided with a first upper flange (3012) and a first lower flange (3013); the rear sub-frame rear mounting reinforcement plate (301) is connected to the top wall (1032) of the rear floor longitudinal beam cavity (103) via the first upper flange (3012); and the rear sub-frame rear mounting reinforcement plate (301) is connected to the bottom wall (1031) of the rear floor longitudinal beam cavity (103) via the first lower flange (3013).

9. The rear floor longitudinal member according to claim 7, characterized in that: The longitudinal reinforcement (3) further comprises a rear floor longitudinal beam front reinforcement plate (302) located between the rear subframe front mounting reinforcement plate (202) and the rear shock absorber inner support plate (201), wherein the rear floor longitudinal beam front reinforcement plate (302) is located in the middle of the rear floor longitudinal beam cavity in the left-right direction of the vehicle; The rear floor longitudinal beam front reinforcement plate (302) is bent along the bending direction of the rear floor longitudinal beam body (1), and the upper and lower sides of the rear floor longitudinal beam front reinforcement plate (302) are respectively provided with a second upper flange (3021) and a second lower flange (3022); the rear floor longitudinal beam front reinforcement plate (302) is connected to the top wall (1032) of the rear floor longitudinal beam cavity (103) through the second upper flange (3021), and the rear floor longitudinal beam front reinforcement plate (302) is connected to the bottom wall (1031) of the rear floor longitudinal beam cavity (103) through the second lower flange (3022).

10. A vehicle, characterized in that: The rear floor assembly of a vehicle includes the rear floor longitudinal member according to any one of claims 1 to 9.

Images