Vehicle body middle structure and vehicle

Abstract

The utility model provides a vehicle body middle structure and a vehicle, the vehicle body middle structure comprises a doorsill beam, a front floor panel positioned on the inner side of the doorsill beam, and a first front floor cross beam and a front floor upper longitudinal beam which are positioned above the front floor panel; the front floor upper longitudinal beam and the threshold beam are arranged side by side, and the front floor upper longitudinal beam is located on the front side of the first front floor cross beam in the front-back direction of the whole vehicle. A second connecting plate is arranged between the front floor upper longitudinal beam and the first front floor cross beam, and / or a third connecting plate is arranged between the first front floor cross beam and the front floor panel, and the third connecting plate is located on the rear side of the first front floor cross beam in the front-back direction of the whole vehicle. According to the vehicle body middle structure, tearing of a welding spot at the first front floor cross beam can be avoided, upward folding of the first front floor cross beam is restrained, the problem that force transmission at the first front floor cross beam is not smooth is solved, the side collision performance can be improved, and the collision safety of the whole vehicle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a middle body structure. Meanwhile, the utility model also relates to a vehicle provided with the middle body structure. Background Art

[0002] In the prior art, the middle body structure usually includes a front floor panel, sill beams arranged on the left and right sides of the front floor panel, and a seat cross beam arranged on the front floor panel, etc. As an important part of the vehicle body, it can absorb impact force during a collision, reduce the harm to the driver and passengers, and provide a certain degree of protection. However, the existing middle body structure still has the problems of simple structural design, easy tearing of the welds at the seat cross beam during side collision, resulting in poor force transmission, which is not conducive to improving the overall vehicle safety. Summary of the Utility Model

[0003] In view of this, the utility model aims to propose a middle body structure to improve the overall vehicle collision safety.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A middle body structure includes sill beams, a front floor panel located inside the sill beams, and a first front floor cross beam and a front floor longitudinal beam located above the front floor panel;

[0006] The front floor longitudinal beam is arranged side by side with the sill beam, and in the front - rear direction of the whole vehicle, the front floor longitudinal beam is located in front of the first front floor cross beam;

[0007] A first connecting plate is provided between the front floor longitudinal beam and the first front floor cross beam, and / or a second connecting plate is provided between the first front floor cross beam and the front floor panel. In the front - rear direction of the whole vehicle, the second connecting plate is located behind the first front floor cross beam.

[0008] Further, a third connecting plate is provided between the first front floor cross beam and the sill beam, a first reinforcing plate corresponding to the third connecting plate in the up - down direction is provided below the front floor panel, and the first reinforcing plate is connected to the sill beam.

[0009] Further, a first cavity is formed between the third connecting plate and the front floor panel, and / or a second cavity is formed between the first reinforcing plate and the front floor panel.

[0010] Further, it further includes a front floor longitudinal beam disposed below the front floor panel; the front floor longitudinal beam is arranged side by side with the sill beam, and is arranged corresponding to the upper and lower positions of the front floor upper longitudinal beam, and the first reinforcing plate is connected between the sill beam and the front floor longitudinal beam.

[0011] Further, a third cavity is formed between the front floor upper longitudinal beam and the front floor panel.

[0012] Further, a fourth cavity is formed between the front floor longitudinal beam and the front floor panel, and a longitudinal beam reinforcing plate is arranged inside the front floor longitudinal beam, and the longitudinal beam reinforcing plate divides the fourth cavity into two arranged up and down.

[0013] Further, the first connecting plate and the front floor upper longitudinal beam are connected by a screw connection structure, and the first connecting plate and the first front floor cross beam are connected by welding; and / or at least one of the first front floor cross beam and the front floor panel is connected to the second connecting plate by welding.

[0014] Further, it further includes a second front floor cross beam disposed above the front floor panel; in the longitudinal direction of the whole vehicle, the second front floor cross beam is located behind the first front floor cross beam and is arranged at an interval from the first front floor cross beam; a fourth connecting plate is arranged between the second front floor cross beam and the sill beam, and a second reinforcing plate corresponding to the fourth connecting plate up and down is arranged below the front floor panel, and the second reinforcing plate is connected to the sill beam.

[0015] Further, a fifth cavity is formed in the sill beam, and a sill reinforcing beam arranged in the longitudinal direction of the whole vehicle is arranged in the fifth cavity.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] In the middle structure of the vehicle body of the present invention, by cooperatively arranging the first connecting plate and the second connecting plate, and in the longitudinal direction of the whole vehicle, the second connecting plate is located behind the first front floor cross beam, the structural strength of the first front floor cross beam can be enhanced to avoid the tearing of the welding points at the first front floor cross beam, inhibit the upward folding of the first front floor cross beam, solve the problem of unsmooth force transmission at the first front floor cross beam, and further improve the side impact performance, thereby improving the collision safety of the whole vehicle.

[0018] Furthermore, by providing a third connecting plate and a first reinforcing plate, and forming a first cavity between the third connecting plate and the front floor panel, and forming a second cavity between the first reinforcing plate and the front floor panel, a "日"-shaped cavity can be formed, so that a similar energy absorption box structure is formed between the third connecting plate, the first reinforcing plate and the front floor panel, which plays a role in crushing and absorbing energy during a side collision, thereby improving the side collision energy absorption performance of the vehicle body structure, thereby helping to improve the collision performance and safety quality of the entire vehicle.

[0019] In addition, the front floor lower longitudinal beam is provided to improve the structural strength of the front floor panel. At the same time, the front floor lower longitudinal beam is arranged side by side with the door sill beam, and the first reinforcing plate is connected between the door sill beam and the front floor lower longitudinal beam, which is conducive to improving the force transmission effect between the front floor lower longitudinal beam and the door sill beam, thereby further improving the side collision safety. The front floor upper longitudinal beam is provided, and the front floor upper longitudinal beam and the front floor lower longitudinal beam correspond to each other up and down, which is conducive to improving the structural strength of the front floor panel and the force transmission and decomposition ability of the front floor lower longitudinal beam.

[0020] Secondly, a third cavity is formed between the upper longitudinal beam and the front floor panel on the front floor, a fourth cavity is formed between the lower longitudinal beam and the front floor panel on the front floor, and a longitudinal beam reinforcement plate is provided in the lower longitudinal beam of the front floor, which divides the fourth cavity into two arranged in an upper and lower manner, forming a cavity structure similar to the Chinese character "目", which can not only suppress the folding of the first front floor cross beam, but also help to improve the force transmission effect of a head-on collision, thereby improving the head-on collision safety of the entire vehicle. The rear end of the upper longitudinal beam on the front floor is connected to the first front floor cross beam, and a force transmission channel can be built between the two to improve collision safety.

[0021] In addition, the first connecting plate is connected to the upper longitudinal beam of the front floor through a screw connection structure, which is conducive to improving the convenience of assembly of the two. At the same time, the first connecting plate is welded to the first front floor cross beam, and the first front floor cross beam and the front floor panel are welded to the second connecting plate, which can improve the structural stability. The fourth connecting plate and the second reinforcing plate are provided to improve the structural strength of the front floor panel and also to improve the force transmission performance between the threshold beam and the second front floor cross beam. A fifth cavity is formed in the threshold beam, which is conducive to increasing the structural strength and collision buffering energy absorption, and a threshold reinforcement beam is provided to further improve the structural strength of the threshold beam.

[0022] Another object of the present invention is to provide a vehicle, wherein the vehicle is provided with the above-mentioned mid-body structure.

[0023] The vehicle described in the utility model is provided with the above-mentioned mid-body structure, which can improve the collision performance of the entire vehicle, especially the side collision safety, so as to improve the safety quality of the entire vehicle, thereby facilitating the market competitiveness of the entire vehicle product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0025] Figure 1 is a schematic diagram of the overall structure of the middle part of the vehicle body according to the embodiment of the present utility model;

[0026] Figure 2 and Figure 3 is Figure 1 a schematic diagram of the structure shown in different perspectives;

[0027] Figure 4 is Figure 3 a sectional view taken along the A-A direction in;

[0028] Figure 5 is Figure 3 a sectional view taken along the B-B direction in;

[0029] Figure 6 is Figure 5 an enlarged view at C in;

[0030] Figure 7 is a schematic diagram of the structure of the front floor upper longitudinal beam according to the embodiment of the present utility model;

[0031] Figure 8 is a schematic diagram of the structure when the second connecting plate and the third connecting plate are assembled with the first front floor cross beam according to the embodiment of the present utility model;

[0032] Figure 9 is a schematic diagram of the structure of the front floor lower longitudinal beam according to the embodiment of the present utility model;

[0033] Figure 10 is a schematic diagram of the structure of the first connecting plate according to the embodiment of the present utility model;

[0034] Figure 11 is a schematic diagram of the structure of the second connecting plate according to the embodiment of the present utility model;

[0035] Figure 12 is a schematic diagram of the structure of the third connecting plate according to the embodiment of the present utility model;

[0036] Figure 13 is a schematic diagram of the structure of the fourth connecting plate according to the embodiment of the present utility model;

[0037] Figure 14 is a schematic diagram of the structure of the first reinforcing plate according to the embodiment of the present utility model;

[0038] Figure 15Structural schematic diagram of the second reinforcing plate described in the embodiment of the present utility model;

[0039] Explanation of reference numerals:

[0040] 1, sill beam; 100, fifth cavity; 101, sill reinforcing beam;

[0041] 2, front floor panel; 3, first front floor cross beam; 4, second front floor cross beam; 5, front floor longitudinal beam; 51, longitudinal beam reinforcing plate; 52, longitudinal beam flange;

[0042] 6, front floor upper longitudinal beam; 61, first upper longitudinal beam flange; 62, second upper longitudinal beam flange;

[0043] 7, third connecting plate; 71, first connecting flange; 72, second connecting flange;

[0044] 8, first connecting plate; 81, screw hole; 82, vertical part;

[0045] 9, second connecting plate; 10, fourth connecting plate; 1001, third connecting flange; 1002, fourth connecting flange;

[0046] 11, first reinforcing plate; 1101, first flange; 1102, second flange; 1103, third flange;

[0047] 12, second reinforcing plate; 1201, fourth flange; 1202, fifth flange; 1203, sixth flange;

[0048] 13, first cavity; 14, second cavity; 15, third cavity; 16, fourth cavity. Detailed implementation manners

[0049] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0050] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0051] Taking the vehicle where the middle body structure described in the present utility model is located as an example, the orientation words such as "up, down, left, right, front, and back" used in the embodiments are defined based on the up-down direction (also known as the height direction or the vehicle's Z-direction), left-right direction (also known as the width direction or the vehicle's Y-direction), and front-back direction (also known as the length direction or the vehicle's X-direction) of the vehicle. "Inside and outside" are defined based on the contour of the corresponding component. For example, "inside and outside" defined based on the vehicle contour, the side closer to the middle of the vehicle is "inside", and vice versa is "outside".

[0052] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connection components" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0053] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0054] Embodiment 1

[0055] This embodiment relates to a middle body structure, which can solve the problem of poor side collision energy absorption effect by adding a "day"-shaped cavity similar to an energy absorption box, thereby facilitating the improvement of the overall vehicle safety quality.

[0056] In terms of the overall structure, as Figures 1 to 15 shown in, the middle body structure of this embodiment includes a sill beam 1, a front floor panel 2 located inside the sill beam 1, and a first front floor cross beam 3 and a front floor longitudinal beam 6 located above the front floor panel 2.

[0057] Among them, the front floor longitudinal beam 6 is arranged side by side with the sill beam 1, and in the front-back direction of the vehicle, the front floor longitudinal beam 6 is located in front of the first front floor cross beam 3. A first connecting plate 8 is provided between the front floor longitudinal beam 6 and the first front floor cross beam 3. At the same time, a second connecting plate 9 is provided between the first front floor cross beam 3 and the front floor panel 2. In the front-back direction of the vehicle, the second connecting plate 9 is located behind the first front floor cross beam 3.

[0058] At this time, with the above settings, by cooperating with the setting of the first connecting plate 8 and the second connecting plate 9, and in the front-rear direction of the whole vehicle, the second connecting plate 9 is located behind the first front floor cross beam 3, the structural strength of the first front floor cross beam 3 can be strengthened to avoid the tearing of the welding points at the first front floor cross beam 3, inhibit the upward folding of the first front floor cross beam 3, solve the problem of unsmooth force transmission at the first front floor cross beam 3, and further improve the side impact performance.

[0059] Based on the above overall introduction, specifically, in this embodiment, during specific implementation, in addition to respectively arranging the first connecting plate 8 and the second connecting plate 9 on the front and rear sides of the first front floor cross beam 3, according to the actual demand for preventing the tearing of welding points, the first connecting plate 8 can also be arranged only on the front side of the first front floor cross beam 3, or the second connecting plate 9 can be arranged only on the rear side of the first front floor cross beam 3, etc.

[0060] As a preferred implementation form, a third connecting plate 7 is provided between the first front floor cross beam 3 and the sill beam 1 of this embodiment, and a first reinforcing plate 11 arranged corresponding to the third connecting plate 7 up and down is provided below the front floor panel 2, and the first reinforcing plate 11 is connected to the sill beam 1. At the same time, a first cavity 13 is formed between the third connecting plate 7 and the front floor panel 2, and a second cavity 14 is formed between the first reinforcing plate 11 and the front floor panel 2.

[0061] This embodiment can set the third connecting plate 7 and the first reinforcing plate 11, form a first cavity 13 between the third connecting plate 7 and the front floor panel 2, and form a second cavity 14 between the first reinforcing plate 11 and the front floor panel 2, as Figure 5 and Figure 6 shown in, so that the first cavity 13 and the second cavity 14 form a cavity similar to the Chinese character 'Ri' as a whole, so that a structure similar to an energy-absorbing box is formed among the third connecting plate 7, the first reinforcing plate 11 and the front floor panel 2, playing a better role in crushing and absorbing energy during side impact, thereby improving the side impact safety performance of the whole vehicle.

[0062] It is worth mentioning that inside the sill beam 1 of this embodiment, that is, in the left-right direction of the whole vehicle, the side of the sill beam 1 facing the interior of the vehicle, and during specific implementation, in addition to simultaneously setting the first cavity 13 and the second cavity 14, this embodiment can also set only the first cavity 13 or the second cavity 14 according to the side impact energy absorption demand and the structural strength demand.

[0063] The third connecting plate 7 of this embodiment is as Figure 10 shown, which includes a first connecting flange 71 connected to the front floor panel 2 and a second connecting flange 72 connected to the sill beam 1, and the first connecting flange 71 is two arranged on the front and rear sides of the third connecting plate 7 respectively, and the second connecting flange 72 is located at the left end of the third connecting plate 7. At the same time, the first reinforcing plate 11 of this embodiment is as Figure 14As shown, first flanges 1101 connected to the front floor panel 2 are provided on both the front and rear sides thereof, and second flanges 1102 connected to the sill beam 1 and third flanges 1103 connected to the front floor longitudinal beam 5 described below are respectively provided at both the left and right ends thereof.

[0064] Moreover, the middle structure of the vehicle body in this embodiment further includes a middle channel and left and right sill beams 1. The front floor panel 2 includes a left front floor panel 2 provided between the left sill beam 1 and the middle channel, and a right front floor panel 2 provided between the right sill beam 1 and the middle channel. The first front floor cross beam 3 also includes a left first front floor cross beam 3 provided on the left front floor panel 2 and a right first front floor cross beam 3 provided on the right front floor panel 2, etc. That is, the middle structure of the vehicle body in this embodiment is generally a structurally designed form with left-right symmetry in the overall vehicle vision, and Figures 1 to 3 only the left half of the middle structure of the vehicle body is mainly shown herein, and in this embodiment, the left half structure of the middle structure of the vehicle body is mainly used for specific description, which will not be elaborated hereinafter.

[0065] Secondly, in this embodiment, as a preferred implementation form, still as Figure 2 and Figure 3 shown, a front floor longitudinal beam 5 is further provided below the front floor panel 2. Among them, the front floor longitudinal beam 5 is arranged side by side with the sill beam 1, and the first reinforcing plate 11 is connected between the sill beam 1 and the front floor longitudinal beam 5.

[0066] Here, by providing the front floor longitudinal beam 5, it is beneficial to improve the structural strength of the front floor panel 2. At the same time, the front floor longitudinal beam 5 is arranged side by side with the sill beam 1, and the first reinforcing plate 11 is connected between the sill beam 1 and the front floor longitudinal beam 5, which is beneficial to improving the force transmission effect between the front floor longitudinal beam 5 and the sill beam 1, thereby further improving the side collision safety.

[0067] Furthermore, considering the transmission and dispersion effects of the collision force, in this embodiment, as a preferred implementation form, as Figure 1 and Figure 3 shown, the middle structure of the vehicle body further includes a front floor upper longitudinal beam 6 provided above the front floor panel 2. And, the front floor upper longitudinal beam 6 is arranged side by side with the sill beam 1, and the front floor upper longitudinal beam 6 and the front floor longitudinal beam 5 are arranged corresponding to each other vertically.

[0068] At this time, by providing the front floor upper longitudinal beam 6 and the front floor upper longitudinal beam 6 and the front floor longitudinal beam 5 corresponding to each other vertically, it is not only beneficial to improve the structural strength of the front floor panel 2, but also beneficial to improve the force transmission and decomposition ability of the front floor longitudinal beam 5.

[0069] During specific implementation, in this embodiment, as a preferred implementation form, as Figure 4As shown, a third cavity 15 is formed between the front floor upper longitudinal beam 6 and the front floor panel 2. At the same time, a fourth cavity 16 is formed between the front floor lower longitudinal beam 5 and the front floor panel 2. A longitudinal beam reinforcement plate 51 is provided in the front floor lower longitudinal beam 5. The longitudinal beam reinforcement plate 51 divides the fourth cavity 16 into two cavities arranged in an upper and lower manner.

[0070] The advantage of such a configuration is that the fourth cavity 16 can be separated into two upper and lower cavities by the longitudinal beam reinforcement plate 51, so that the two fourth cavities 16 cooperate with the third cavity 15 to form a "目"-shaped cavity structure, which can not only suppress the upward folding of the first front floor beam 3, but also help to improve the force transmission effect of a head-on collision, thereby improving the head-on collision safety of the entire vehicle.

[0071] Secondly, when the first front floor beam 3 of the present embodiment is implemented, a mounting structure for mounting a front mounting point of a vehicle seat may be provided on its top to form a front seat beam. In the prior art, due to limitations of the vehicle body structure, the first front floor beam 3 (that is, the front seat beam) usually forms an inflection point in the left and right directions of the vehicle, which makes it easy for it to bend upward under force and transmit force poorly. In severe cases, it may cause problems such as cracking of welds in the beam area. The above-mentioned structural design similar to the "目"-shaped cavity can improve the risk of the beam bending upward to a certain extent.

[0072] In this embodiment, as a preferred implementation form, in the front-to-rear direction of the vehicle, the front floor upper longitudinal beam 6 is located in front of the first front floor cross beam 3, and the rear end of the front floor upper longitudinal beam 6 is connected to the first front floor cross beam 3. Thus, a force transmission channel can be built between the two to improve collision safety.

[0073] In addition, in the specific implementation, in this embodiment, as a preferred implementation form, the first connecting plate 8 and the front floor upper longitudinal beam 6 are connected by a screw connection structure to facilitate the assembly convenience of the two, and the first connecting plate 8 is welded to the first front floor cross beam 3. At the same time, at least one of the first front floor cross beam 3 and the front floor panel 2 is welded to the second connecting plate 9, thereby ensuring the connection stability of the entire structure.

[0074] It is worth mentioning here that in this embodiment, in order to facilitate the arrangement and installation of the longitudinal beam 6 on the front floor, as shown in FIG. Figure 4 and Figure 7 As shown, it can be roughly U-shaped in design as a whole, and has a first upper longitudinal beam flange 61 arranged on its left and right sides to facilitate connection with the front floor panel 2, and a second upper longitudinal beam flange 62 arranged at its rear end in the front and rear direction of the vehicle to facilitate improving the connection strength between it and the first front floor cross beam 3.

[0075] Furthermore, the first connecting plate 8 of this embodiment can be Figure 11As shown, it can generally be designed in an L shape as a whole, and has a transverse part connected to the longitudinal beam 6 on the front floor, and a vertical part 82 connected to the first front floor cross beam 3. Specifically, screw holes 81 for screwing with the longitudinal beam 6 on the front floor are provided on the transverse part, and the vertical part 82 can be specifically welded to the first front floor cross beam 3 through the second longitudinal beam flange 62.

[0076] Moreover, it should be noted that to ensure the connection stability between the first front floor cross beam 3, the front floor panel 2 and the second connecting plate 9, it is preferably to weld and connect between the first front floor cross beam 3 and the second connecting plate 9 and between the front floor panel 2 and the second connecting plate 9.

[0077] Secondly, in this embodiment, as shown in Figure 4 , Figure 8 and Figure 9 the lower longitudinal beam 5 of the front floor is generally in a "U" shape as a whole, which not only helps to form the fourth cavity 16, but also can form lower longitudinal beam flanges 52 on the left and right sides for connecting with the front floor panel 2 to improve the connection stability between the lower longitudinal beam 5 of the front floor and the front floor panel 2. And the longitudinal beam reinforcement plate 51 can generally be in a U shape as a whole to facilitate connecting with the two opposite side walls of the lower longitudinal beam 5 of the front floor.

[0078] Furthermore, in this embodiment, to improve the convenience and safety of the body middle structure, during specific implementation, the longitudinal beam 6 on the front floor and the first front floor cross beam 3 can be assembled first, and then the assembled body of the two can be combined with the front floor panel 2, or the longitudinal beam 6 on the front floor and the front floor panel 2 can be assembled first and then combined with the first front floor cross beam 3. At this time, since assembling the longitudinal beam 6 on the front floor and the first front floor cross beam 3 first will form a T-shaped structure, which is not only inconvenient to take, but also easy to scratch the workers and prone to deformation problems during the process of loading the workpiece. Therefore, compared with the former method, the latter method is not only beneficial to improving the convenience of taking the workpiece, but also more conducive to reducing the danger of the operation of the station workers, as well as improving the assembly accuracy and the space utilization rate of the assembly station.

[0079] In addition, in this embodiment, as a preferred implementation form, referring to Figures 1 to 3 again, the body middle structure of this embodiment further includes a second front floor cross beam 4 provided above the front floor panel 2. In the longitudinal direction of the whole vehicle, the second front floor cross beam 4 is located behind the first front floor cross beam 3 and is arranged at intervals with the first front floor cross beam 3.

[0080] At the same time, a fourth connecting plate 10 is provided between the second front floor cross beam 4 and the sill beam 1, and a second reinforcement plate 12 corresponding to the fourth connecting plate 10 up and down is provided below the front floor panel 2, and the second reinforcement plate 12 is connected to the sill beam 1.

[0081] It can be understood that the arrangement of the fourth connecting plate 10 and the second reinforcing plate 12 can not only enhance the structural strength of the front floor panel 2, but also facilitate the force transmission performance between the sill beam 1 and the second front floor cross beam 4.

[0082] Certainly, in the specific structure, a cavity similar to the Chinese character "ri" is formed between the fourth connecting plate 10 and the front floor panel 2 and between the second reinforcing plate 12 and the front floor panel 2, so that the three form a structure similar to an energy absorption box to enhance the collapse energy absorption effect during side impact, thereby improving the vehicle's side impact safety.

[0083] At this time, the fourth connecting plate 10 of this embodiment is as Figure 13 shown. The third connecting flanges 1001 connected to the front floor panel 2 are respectively provided on the front and rear sides of itself, and the fourth connecting flange 1002 connected to the sill beam 1 is provided at the left end of itself to ensure the installation stability of the fourth connecting plate 10.

[0084] In addition, in this embodiment, as a preferred implementation form, still as Figure 4 shown, a fifth cavity 100 is formed in the sill beam 1, and a sill reinforcing beam 101 arranged along the front and rear directions of the vehicle is provided in the fifth cavity 100. The main advantage of such an arrangement is that it is conducive to increasing the structural strength and collision buffer energy absorption, and the provision of the sill reinforcing beam 101 is conducive to further enhancing the structural strength of the sill beam 1.

[0085] Moreover, during the vehicle's side impact, the sill beam 1 of this embodiment performs preliminary buffering and energy absorption of the collision energy, and the structure similar to an energy absorption box formed by the third connecting plate 7, the first reinforcing plate 11 and the front floor panel 2 can further perform buffering and energy absorption on the basis of the sill beam 1, thereby achieving a good side impact energy absorption effect.

[0086] It is worth mentioning here that the sill beam 1 of this embodiment includes an inner plate and an outer plate that are relatively buckled and connected ( Figure 4 not shown in the figure). The fifth cavity 100 is formed in the area where the inner plate and the outer plate are buckled. At the same time, the sill reinforcing beam 101 can be tubular as a whole, and a plurality of transverse ribs arranged along the left and right directions of the vehicle and a plurality of vertical ribs arranged along the up and down directions of the vehicle are provided in the inner cavity of the sill reinforcing beam 101, and each transverse rib and each vertical rib extend along the front and rear directions of the vehicle, so that the sill reinforcing beam 101 has higher structural strength. Moreover, if necessary, collapse holes can be provided on the side wall of the sill reinforcing beam 101 to facilitate collapse energy absorption, thereby improving the side impact energy absorption effect.

[0087] And, the second reinforcing plate 12 of this embodiment is as Figure 15As shown, on its front and rear sides respectively, there are fourth flanges 1201 connected to the front floor panel 2, and on its left and right ends respectively, there are fifth flanges 1202 connected to the sill beam 1 and sixth flanges 1203 connected to the front floor longitudinal beam 5, to ensure the installation stability of the second reinforcement plate 12.

[0088] It should still be noted that the right half of the middle body structure of this embodiment can be basically similar to the left half structure mainly introduced above. That is, in the structural design of the right half, the above-mentioned various connection plates, various reinforcement plates, the front floor upper longitudinal beam 6 and the front floor lower longitudinal beam 5 and other structures can also be provided, so that the design ideas of the two are completely the same as those of the prior art, thereby enabling the vehicle to achieve better crash safety.

[0089] In addition, the sill beam 1 and the sill reinforcement beam 101 of this embodiment can both be made of common hot-formed steel to ensure good energy absorption effect and avoid excessive deformation of the two front floor cross beams due to excessive force, resulting in insufficient survival space. At the same time, the various connection plates and various reinforcement plates of this embodiment can be prepared from high-strength steel materials well-known to those skilled in the art.

[0090] In the middle body structure of this embodiment, for the relevant structural parts not mentioned, the common body structural parts in the prior art can be referred to. For example, on the second front floor cross beam 4, like the first front floor cross beam 3, an installation structure for installing the rear mounting points of the vehicle seat can be provided on its top, so that the second front floor cross beam 4 specifically constitutes the rear seat cross beam, etc.

[0091] The middle body structure of this embodiment, by cooperatively arranging the first connection plate 8 and the second connection plate 9, and in the front-rear direction of the vehicle, the second connection plate 9 is located behind the first front floor cross beam 3, can strengthen the structural strength of the first front floor cross beam 3, to avoid the tearing of the weld points at the first front floor cross beam 3, inhibit the upward folding of the first front floor cross beam 3, solve the problem of unsmooth force transmission at the first front floor cross beam 3, and further improve the side collision performance of the body structure. Thus, it can be beneficial to improve the vehicle collision performance and safety quality.

[0092] Embodiment Two

[0093] This embodiment relates to a vehicle, in which the middle body structure in Embodiment One is provided.

[0094] The vehicle of this embodiment, by setting the middle body structure in Embodiment One, can solve the problem of insufficient vehicle collision performance, especially improve the side collision safety. Thus, it can be beneficial to improve the vehicle safety performance and enhance the competitiveness of the vehicle product.

[0095] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A middle body structure, characterized in that: It includes a sill beam (1), a front floor panel (2) located inside the sill beam (1), and a first front floor cross beam (3) and a front floor upper longitudinal beam (6) located above the front floor panel (2); The front floor upper longitudinal beam (6) is arranged side by side with the sill beam (1), and in the vehicle longitudinal direction, the front floor upper longitudinal beam (6) is located in front of the first front floor cross beam (3); A first connecting plate (8) is provided between the front floor upper longitudinal beam (6) and the first front floor cross beam (3), and / or a second connecting plate (9) is provided between the first front floor cross beam (3) and the front floor panel (2). In the vehicle longitudinal direction, the second connecting plate (9) is located behind the first front floor cross beam (3).

2. The middle body structure according to claim 1, characterized in that: A third connecting plate (7) is provided between the first front floor cross beam (3) and the sill beam (1), and a first reinforcing plate (11) arranged corresponding to the third connecting plate (7) up and down is provided below the front floor panel (2), and the first reinforcing plate (11) is connected to the sill beam (1).

3. The middle body structure according to claim 2, characterized in that: A first cavity (13) is formed between the third connecting plate (7) and the front floor panel (2), and / or a second cavity (14) is formed between the first reinforcing plate (11) and the front floor panel (2).

4. The middle body structure according to claim 2, characterized in that: It further includes a front floor lower longitudinal beam (5) provided below the front floor panel (2); The front floor lower longitudinal beam (5) is arranged side by side with the sill beam (1), and is arranged corresponding to the front floor upper longitudinal beam (6) up and down, and the first reinforcing plate (11) is connected between the sill beam (1) and the front floor lower longitudinal beam (5).

5. The middle body structure according to claim 1, characterized in that: A third cavity (15) is formed between the front floor upper longitudinal beam (6) and the front floor panel (2).

6. The middle body structure according to claim 1, characterized in that: A fourth cavity (16) is formed between the front floor lower longitudinal beam (5) and the front floor panel (2), and a longitudinal beam reinforcing plate (51) is provided inside the front floor lower longitudinal beam (5), and the longitudinal beam reinforcing plate (51) divides the fourth cavity (16) into two arranged up and down.

7. The middle body structure according to claim 1, characterized in that: The first connecting plate (8) is connected to the front floor upper longitudinal beam (6) through a screwed connection structure, and the first connecting plate (8) is connected to the first front floor cross beam (3) by welding; and / or, At least one of the first front floor cross beam (3) and the front floor panel (2) is connected to the second connecting plate (9) by welding.

8. The middle body structure according to claim 1, characterized in that: It further includes a second front floor cross beam (4) provided above the front floor panel (2); In the longitudinal direction of the whole vehicle, the second front floor crossbeam (4) is located behind the first front floor crossbeam (3) and is arranged at an interval from the first front floor crossbeam (3). A fourth connecting plate (10) is provided between the second front floor crossbeam (4) and the sill beam (1), and a second reinforcing plate (12) corresponding to the fourth connecting plate (10) in the up-and-down direction is provided below the front floor panel (2), and the second reinforcing plate (12) is connected to the sill beam (1).

9. The middle body structure according to any one of claims 1 to 8, characterized in that: A fifth cavity (100) is formed in the sill beam (1), and a sill reinforcing beam (101) arranged in the longitudinal direction of the whole vehicle is provided in the fifth cavity (100).

10. A vehicle, characterized in that: The vehicle is provided with the middle body structure according to any one of claims 1 to 9.

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