CN219728325U - Vehicle body middle structure and vehicle - Google Patents

Abstract

The utility model provides a vehicle body middle structure and a vehicle, wherein the vehicle body middle structure comprises a front seat mounting cross beam arranged above a front floor panel and a battery pack arranged below the front floor panel; the front seat mounting cross beam is provided with a cross beam body, the cross beam body is provided with a plurality of cross beam main bodies which are sequentially connected along the front-back direction of the whole vehicle, the cross section of each cross beam main body is in a shape like a Chinese character 'ji', the bottom of the cross beam body is provided with a plurality of connecting surfaces, and each connecting surface is connected with the front floor panel; the battery pack is internally provided with a reinforcing beam which is correspondingly arranged up and down with the front seat mounting beam, and the reinforcing beam is connected with the beam body through a first screw-connection assembly. The middle structure of the vehicle body can ensure the reliability of front-row seat installation, can promote the stability of the battery pack arranged in the vehicle body, is beneficial to the cooperative transmission of side collision force through the reinforcing cross beam and the front-row seat installation cross beam, and is beneficial to the improvement of the collision safety of the whole vehicle.

Description

Vehicle body middle structure and vehicle

Technical Field

The utility model relates to the technical field of vehicle body structures, in particular to a vehicle body middle structure. The utility model also relates to a vehicle provided with the vehicle body middle structure.

Background

For electric vehicles and hybrid vehicles which are increasingly popular, a battery pack is usually arranged at the bottom of a front floor, and the installation point of the battery pack of the conventional vehicle type is mostly fixed through a middle channel longitudinal beam inner support or a seat cross beam inner support, so that the battery pack cannot play a good force transmission role when the vehicle collides, particularly when side collision occurs, and cannot effectively transmit side collision load, thereby influencing the usability of the whole vehicle.

Disclosure of Invention

In view of the above, the present utility model aims to provide a vehicle body middle structure that can promote stability of the battery pack arrangement and facilitate transmission of side impact collision force.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a vehicle body middle structure comprises a front seat mounting cross beam arranged above a front floor panel and a battery pack arranged below the front floor panel;

the front seat mounting cross beam is provided with a cross beam body extending along the left-right direction of the whole vehicle, the cross beam body is provided with a plurality of cross beam bodies connected in sequence along the front-back direction of the whole vehicle, the cross section of each cross beam body is in a shape like a Chinese character 'ji', the bottom of the cross beam body forms a plurality of connecting surfaces which are arranged at intervals along the front-back direction of the whole vehicle, and each connecting surface is connected with the front floor panel;

the battery pack is internally provided with a reinforcing beam which is correspondingly arranged up and down with the front seat mounting beam, and the reinforcing beam is connected with the beam body through a first screw-connection assembly.

Further, the beam body is formed by adopting a rolling process; and/or each connecting surface is welded and connected with the front floor panel.

Further, the cross beam main body is formed by sequentially connecting two cross beam main bodies along the front-back direction of the whole vehicle, the connecting surfaces are three cross beam main bodies which are arranged at intervals along the front-back direction of the whole vehicle, and the first screw-connection assembly is connected with the connecting surface positioned in the middle; and/or the first screw-connection assemblies are a plurality of screw-connection assemblies which are arranged at intervals along the length direction of the beam body.

Further, the front seat mounting cross beam penetrates from a threshold beam on one side of the vehicle body to the threshold beam on the other side; the front seat mounting cross beam is further provided with connecting beams connected to the left end and the right end of the cross beam body, and the front seat mounting cross beam is connected with the threshold beams on the two sides through the connecting beams.

Further, the vehicle further comprises a front floor upper longitudinal beam extending along the front-rear direction of the whole vehicle; the side of the threshold beam in the car is provided with the front floor upper longitudinal beam respectively, and the connecting beams on each side are arranged across the front floor upper longitudinal beam on the same side and are connected with the front floor upper longitudinal beam on the same side.

Further, connecting brackets which are arranged vertically and correspondingly with the reinforcing cross beams are arranged in the upper longitudinal beams of the front floor at each side, and the reinforcing cross beams are connected with the connecting brackets at both sides through second screw-connection assemblies.

Further, the front seat mounting cross beam comprises a front seat front mounting cross beam and a front seat rear mounting cross beam which are arranged at intervals along the front-rear direction of the whole vehicle; the battery pack is internally provided with the reinforcing cross beam corresponding to the front mounting cross beam of the front seat and the rear mounting cross beam of the front seat respectively.

Further, the device also comprises a middle channel extending along the front-back direction of the whole vehicle; the front end of the middle channel is connected with a front lower cross beam at the bottom of the front wall, and the rear end of the middle channel is cut off to the front mounting cross beam of the front row of seats and is connected with the front mounting cross beam of the front row of seats; the middle channel is provided with a plurality of middle channel main bodies which are sequentially connected along the left-right direction of the whole vehicle, and the cross section of each middle channel main body is in a shape of a Chinese character 'ji'.

Further, the front end of the middle channel is provided with a front end part with a cross section in a shape of a Chinese character 'ji', the front end part is connected with the front lower cross beam, and the front end of each middle channel main body is connected with the front end part; and/or, the middle channel is integrally formed with the front floor panel.

Compared with the prior art, the utility model has the following advantages:

according to the middle structure of the vehicle body, the cross beam body is formed by the plurality of cross beam bodies with the cross sections in the shape of a Chinese character 'ji', the bottom of the cross beam body is provided with the plurality of connecting surfaces which are distributed at intervals, so that the structural strength of the cross beam body can be increased, the connecting strength between the front seat mounting cross beam and the front floor can be increased, the reliability of front seat mounting is ensured, the reinforcing cross beam in the battery pack is connected with the cross beam body, the stability of the battery pack in the vehicle body can be improved, and the side collision force can be cooperatively transmitted through the reinforcing cross beam and the front seat mounting cross beam, so that the whole vehicle collision safety is improved.

In addition, the beam body is formed by adopting a rolling process, so that the preparation of the beam body can be facilitated. The front floor panel is welded and connected with the front seat through each connecting surface, so that the connection operation is convenient, and the connection reliability between the front seat mounting cross beam and the front floor panel can be ensured. The first screw-connection assembly is connected with the middle connecting surface, and can ensure the connection strength between the reinforcing beam and the beam body based on the section modeling of the beam body. The first spiro union subassembly is a plurality of interval arrangement, can guarantee the reliable connection between entablature and the front seat installation crossbeam, more is favorable to collision force to pass through the cooperation transmission of front seat installation crossbeam and entablature.

Secondly, the front seat mounting cross beam is arranged to be of a through structure, so that the penetrability of a force transmission channel formed by the front seat mounting cross beam can be ensured, and the side collision force transmission capacity can be improved. And the connecting beams arranged at the two ends of the beam body are beneficial to the connection between the beam body and the threshold beam. The longitudinal beam is gone up to the floor before setting up, can increase the holistic structural strength of floor position before can increasing to can increase the power transmission passageway along whole car fore-and-aft direction, be favorable to promoting whole car collision safety, each side tie beam spanes the longitudinal beam on the floor before the homonymy, can guarantee the design of lining up of seat crossbeam, makes the tie beam be connected with the longitudinal beam on the floor before, then can further promote the stability that the front row seat safety crossbeam set up.

And thirdly, the connecting support arranged in the upper longitudinal beam of the front floor is connected with the reinforcing cross beam, so that the transmission and dispersion of collision force between the upper longitudinal beam of the front floor and the reinforcing cross beam and the like can be facilitated. The front seat installation cross beams are two front and rear arranged at intervals, so that the front seat installation arrangement can be facilitated, the front seat installation stability can be guaranteed, meanwhile, the reinforcing cross beams are respectively arranged corresponding to the front and rear installation cross beams, and the stability of the battery pack in the whole vehicle can be improved.

In addition, well passageway comprises the well passageway main part that connects gradually and the transversal form of taking a few style of calligraphy, can make well passageway be wave-like structure, can increase the cross-sectional area of well passageway, promotes the structural strength of well passageway self to make well passageway cut off to be connected with front seat front mounting crossbeam, can reduce well passageway size, do benefit to its arrangement in the automobile body, also help the transmission dispersion of collision force to front seat mounting crossbeam simultaneously. The front end of the middle channel is provided with the front end part, so that the connection between the middle channel and the front wall lower cross beam can be facilitated, and the connection reliability can be ensured. The middle channel and the front floor panel are integrally formed, so that the connection strength between the middle channel and the front floor panel can be ensured, the front floor is formed, and the preparation cost is reduced.

Another object of the present utility model is to provide a vehicle in which the above-described vehicle body center structure is provided.

The vehicle provided by the utility model can ensure the reliability of front seat installation by arranging the vehicle body middle structure, and is also beneficial to improving the collision safety of the whole vehicle.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view of a vehicle body middle structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a vehicle body center structure according to an embodiment of the present utility model;

FIG. 3 is a partial cross-sectional view of a mid-body structure according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a front seat mounting cross member and a front floor upper longitudinal member in a mated state according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a front floor upper longitudinal beam and a reinforcing cross beam in a mated state according to an embodiment of the present utility model;

fig. 6 is a schematic view of a battery pack without an upper battery case according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a middle tunnel and front seat mounting cross member according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a front seat mounting cross member according to an embodiment of the present utility model;

reference numerals illustrate:

1. a front lower plate; 2. a front floor panel; 3. a middle channel; 8. a battery pack;

10. a first threaded assembly; 20. a second threaded assembly; 11. a front floor upper longitudinal beam; 111. a connecting bracket; 21. a front seat mounting cross beam; 211. a cross beam is arranged in front of the front row of seats; 212. a cross beam is arranged behind the front row of seats; 2110. a beam body; 2111. a beam body; 2112. a connecting beam; 2113. a connection surface; 31. a front end portion; 30. a middle channel body; 81. a reinforcing beam; 811. a first mounting point; 812. and a second mounting point.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, in the description of the present utility model, unless otherwise specifically defined, the mating components may be connected using conventional connection structures in the art. Moreover, the terms "mounted," "connected," and "connected" are to be construed broadly. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

In the present embodiment, the term "up, down, left, right, front, and rear" is defined with reference to the up-down direction, the left-right direction, and the front-rear direction of the vehicle. In particular, as shown in the drawings, the X direction is the front-rear direction of the vehicle, wherein the side pointed by the arrow is the "front", and vice versa. The Y direction is the left-right direction of the vehicle, wherein the side pointed by the arrow is "left", and vice versa. The Z direction is the up-down direction of the vehicle, wherein the side pointed by the arrow is "up", and vice versa. The "inside and outside" are defined with reference to the contour of the corresponding component, for example, the inside and outside of the vehicle are defined with reference to the contour of the vehicle, and the side near the middle of the vehicle is the "inside", and vice versa.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to a vehicle body middle structure to be able to promote the stability that the battery package 8 set up, and do benefit to the transmission of side collision force, and can promote whole car collision security.

As a whole, the vehicle body middle structure of the present embodiment mainly includes a front seat mounting cross member 21 provided above the front floor panel 2, and a battery pack 8 provided below the front floor panel 2, as shown in fig. 1 to 3.

The front seat mounting cross beam 21 has a cross beam body 2111 extending in the left-right direction of the whole vehicle, the cross beam body 2111 has a plurality of cross beam bodies 2110 connected in sequence in the front-rear direction of the whole vehicle, the cross section of each cross beam body 2110 is in a shape of a Chinese character 'ji', and the bottom of the cross beam body 2111 is provided with a plurality of connecting surfaces 2113 arranged at intervals in the front-rear direction of the whole vehicle, and each connecting surface 2113 is connected with the front floor panel 2. And the battery pack 8 is internally provided with a reinforcing beam 81 which is arranged correspondingly up and down to the front seat mounting beam 21, and the reinforcing beam 81 is connected with the beam body 2111 through the first screw-connection assembly 10.

In the above structure, by arranging the beam body 2111 composed of the plurality of beam bodies 2110 having the cross section in a shape of a Chinese character 'ji', and forming the plurality of connection faces 2113 arranged at intervals at the bottom of the beam body 2111, the structural strength of the beam body 2111 itself can be increased, the connection strength between the front seat mounting beam 21 and the front floor can be increased, and the reliability of the front seat mounting can be ensured. And set up the entablature 81 in the battery package 8 and link to each other with crossbeam body 2111, not only can promote the stability that the battery package 8 set up in the automobile body, also can do benefit to the side to bump the collision force and pass through entablature 81 and front row seat installation crossbeam 21 and pass through the transmission in coordination, and help promoting and pass power energy-absorbing, promote whole car collision security.

In detail, with continued reference to fig. 1 to 3, the vehicle body center structure of the present embodiment mainly includes a front floor panel 2, a front floor upper side member 11, a center tunnel 3, a front seat mounting cross member 21, a battery pack 8, and the like. Wherein, the front end of the front floor panel 2 is connected with the front lower plate 1 at the bottom of the front wall, the front floor upper longitudinal beam 11 extends along the front-back direction of the whole vehicle and is two threshold beams arranged at two sides close to one side in the vehicle, and the front floor upper longitudinal beam 11 is connected with the front floor panel 2. The middle tunnel 3 extends in the front-rear direction of the entire vehicle and is arranged between the front floor upper side members 11 on both sides. The front seat mounting cross member 21 is provided above the front floor panel 2, and the battery pack 8 is provided below the front floor panel 2.

In this embodiment, the front seat mounting cross member 21 has a cross member body 2111 extending in the left-right direction of the entire vehicle, the cross member body 2111 has a plurality of cross member bodies 2110 connected in sequence in the front-rear direction of the entire vehicle, and each cross member body 2110 has a cross section in a shape of a "nearly" and has a bottom portion of the cross member body 2111 formed with a plurality of connection faces 2113 arranged at intervals in the front-rear direction of the entire vehicle, and the cross member body 2111 is welded to the front floor panel 2 through each connection face 2113. In this way, the connection operation of the cross member body 2111 with the front floor panel 2 can be facilitated, and the connection reliability between the front seat mounting cross member 21 and the front floor panel 2 can be ensured.

Referring to fig. 5 and 6, the battery pack 8 of the present embodiment is structured to have a battery pack upper case and a battery pack lower case, and a module, an electric component, and the like accommodated in the battery pack lower case. Wherein, be equipped with the stiffening beam 81 in the battery package 8, this stiffening beam 81 and the corresponding arranging from top to bottom of front seat installation crossbeam 21, and stiffening beam 81 links to each other with crossbeam body 2111 through first spiro union subassembly 10. The reinforcing beam 81 in the battery pack 8 is connected with the beam body 2111, so that the stability of the battery pack 8 in the vehicle body can be improved, and the side collision force can be cooperatively transmitted through the reinforcing beam 81 and the front seat mounting beam 21, thereby being beneficial to improving force transmission and energy absorption.

As a preferred embodiment, the beam body 2111 of the present embodiment is preferably formed by a roll process, which is provided to facilitate the preparation of the beam body 2111. Also, as a preferred embodiment, the cross member body 2110 of the present embodiment is formed by two connecting surfaces 2113 sequentially connected in the front-rear direction of the entire vehicle, and three connecting surfaces 2113 are arranged at intervals in the front-rear direction of the entire vehicle, and the first screw assembly 10 is specifically connected to the connecting surface 2113 located in the middle. Thus, the strength of the connection between the reinforcing beam 81 and the beam body 2111 can be ensured based on the cross-sectional shape of the beam body 2111.

Moreover, in order to facilitate securing the reliability of the connection between the reinforcement beam 81 and the front seat mounting beam 21, the first screw assemblies 10 are provided in this embodiment in a plurality of spaced apart relationship along the length of the beam body 2111. The provision of the plurality of first screw assemblies 10 not only ensures reliable connection between the reinforcement beam 81 and the front seat mounting beam 21, but also facilitates cooperative transmission of the collision force through the front seat mounting beam 21 and the reinforcement beam 81.

The front seat mounting cross member 21 of the present embodiment is structured specifically, and the front seat mounting cross member 21 penetrates from a rocker beam on one side of the vehicle body to a rocker beam on the other side. The front seat mounting cross member 21 further has connection beams 2112 connected to both left and right ends of the cross member body 2111, and the front seat mounting cross member 21 is connected to both side sill beams via the connection beams 2112. By arranging the front seat mounting cross beam 21 to be of a through structure, the penetrability of a force transmission channel formed by the front seat mounting cross beam 21 can be ensured, and the side collision force transmission capability can be improved. In addition, the arrangement of the connecting beams 2112 at both ends of the cross beam body 2111 also facilitates the connection between the cross beam body 2111 and the threshold beam.

Referring to fig. 1 and 4, in the present embodiment, each side connecting beam 2112 is provided across the front floor upper side member 11 on the same side and is connected to the front floor upper side member 11 on the same side. So, not only can increase the holistic structural strength in preceding floor position, the setting of longeron 11 on the preceding floor in addition also can increase the power transmission passageway along whole car fore-and-aft direction, is favorable to promoting whole car collision safety. And each side connecting beam 2112 spans the front floor upper longitudinal beam 11 on the same side, so that the through design of the seat cross beam can be ensured, the connecting beam 2112 is connected with the front floor upper longitudinal beam 11, and the stability of the arrangement of the front seat safety cross beam can be further improved.

With continued reference to fig. 4 to 8, the front seat mounting cross member 21 of the present embodiment includes a front seat front mounting cross member 211 and a front seat rear mounting cross member 212 that are disposed at intervals in the front-rear direction of the vehicle. And the reinforcement cross members 81 are also provided in the battery pack 8 corresponding to the front seat front mounting cross member 211 and the front seat rear mounting cross member 212, respectively. The reinforcing cross members 81, that is, two reinforcing cross members 81 disposed at a spacing in the lower case of the battery pack are shown in fig. 6, the two reinforcing cross members 81 correspond to the front seat front mounting cross member 211 and the front seat rear mounting cross member 212, respectively, and the first mounting point 811 and the second mounting point 812 are provided on each reinforcing cross member 81, respectively. Wherein the first mounting point 811 is for providing a mounting location for the mounting of the first screw assembly 10 and the second mounting point 812 is for improving the mounting location for the mounting of the second screw assembly 20 described below.

In this embodiment, through setting up front seat installation crossbeam 21 for two of front and back interval arrangement, the installation arrangement of front seat of can being convenient for guarantees the stability of front seat installation, simultaneously, sets up stiffening beam 81 respectively corresponding to front, back installation crossbeam, and it can promote the stability that battery package 8 set up in whole car.

As a further preferred embodiment, in the present embodiment, a connection bracket 111 is also provided in each side front floor upper side member 11, and the connection bracket 111 is disposed vertically corresponding to the reinforcing cross member 81. The reinforcing beam 81 is connected with the connecting brackets 111 on both sides through the second screw assembly 20. The connecting bracket 111 provided in the front floor upper side member 11 is connected to the reinforcing cross member 81, and can facilitate the transmission and dispersion of the collision force between the front floor upper side member 11 and the reinforcing cross member 81, etc.

It should be noted that, in the present embodiment, the first screw connection assembly 10 and the second screw connection assembly 20 may be, for example, bolts, screws, nuts, or other connectors, so as to connect the reinforcing beam 81 and the beam body 2111, and connect the reinforcing beam 81 and the connecting bracket 111.

In the middle channel 3 of this embodiment, in a specific structure, as shown in fig. 7, the front end of the middle channel 3 is connected to the front lower beam at the bottom of the front wall, and the rear end of the middle channel 3 is cut off to the front seat front mounting beam 211 and is specifically connected to the front seat front mounting beam 211. The center tunnel 3 has a plurality of center tunnel bodies 30 connected to each other in the right-left direction of the entire vehicle, and each center tunnel body 30 has a cross section in the shape of a "Chinese character" v.

Through setting up well passageway 3 by connect gradually and the transversal middle passageway main part 30 that personally submits several style of calligraphy constitutes, can make well passageway 3 be wave-like structure, not only can increase the cross-sectional area of well passageway 3, promote the structural strength of well passageway 3 self, make well passageway 3 stop to be connected with front seat front mounting cross beam 211 in addition, can also reduce well passageway 3 size, do benefit to its arrangement in the automobile body, also help the transmission dispersion of collision force to front seat mounting cross beam 21 simultaneously.

In this embodiment, the front end of the middle duct 3 has a front end portion 31 having a cross section in the shape of a "table", the front end portion 31 is connected to the front lower cross member, and the front end of each middle duct body 30 is connected to the front end portion 31. The front end 31 is arranged at the front end of the middle channel 3, so that the connection between the middle channel 3 and the front wall lower cross beam can be facilitated, and the connection reliability can be ensured.

Also as a preferred embodiment, the middle tunnel 3 of the present embodiment is preferably integrally formed with the front floor panel 2. In this way, the connection strength between the middle channel 3 and the front floor panel 2 can be ensured, the front floor is shaped, and the manufacturing cost is reduced. And in the specific implementation, the front floor panel 2 integrated with the middle channel 3 can be formed by adopting a laser splice welding plate through an integral thermoforming process.

The vehicle body middle part structure of this embodiment not only can promote the stability that the battery package 8 set up, also does benefit to the side to bump the collision force and passes through the cooperation transmission of entablature 81 and front seat installation crossbeam 21 in addition, and helps promoting whole car collision security.

Example two

The present embodiment also relates to a vehicle in which the vehicle body center structure in the first embodiment is provided.

The vehicle of this embodiment can guarantee the reliability of front seat installation through setting up the automobile body middle part structure in embodiment one, also is favorable to promoting whole car collision security performance, and has fine practicality.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A mid-vehicle body structure, characterized in that:

comprises a front seat mounting beam (21) arranged above a front floor panel (2) and a battery pack (8) arranged below the front floor panel (2);

the front seat mounting cross beam (21) is provided with a cross beam body (2111) extending along the left-right direction of the whole vehicle, the cross beam body (2111) is provided with a plurality of cross beam bodies (2110) which are sequentially connected along the front-rear direction of the whole vehicle, the cross section of each cross beam body (2110) is in a shape of a Chinese character 'ji', the bottom of the cross beam body (2111) forms a plurality of connecting surfaces (2113) which are arranged at intervals along the front-rear direction of the whole vehicle, and each connecting surface (2113) is connected with the front floor panel (2);

the battery pack (8) is internally provided with a reinforcing beam (81) which is correspondingly arranged up and down with the front seat mounting beam (21), and the reinforcing beam (81) is connected with the beam body (2111) through a first screw-connection assembly (10).

2. The mid-body structure according to claim 1, wherein:

the beam body (2111) is formed by adopting a rolling process; and/or, each connecting surface (2113) is welded and connected with the front floor panel (2).

3. The mid-body structure according to claim 1, wherein:

the cross beam main body (2110) is formed by sequentially connecting two cross beam main bodies along the front-back direction of the whole vehicle, the connecting surfaces (2113) are three cross beam main bodies which are arranged at intervals along the front-back direction of the whole vehicle, and the first screw joint assembly (10) is connected with the connecting surfaces (2113) positioned in the middle; and/or the number of the groups of groups,

the first screw-connection assemblies (10) are arranged at intervals along the length direction of the beam body (2111).

4. The mid-body structure according to claim 1, wherein:

the front seat mounting cross beam (21) is communicated from a threshold beam on one side of the vehicle body to the threshold beam on the other side;

the front seat mounting cross beam (21) is further provided with connecting beams (2112) connected to the left end and the right end of the cross beam body (2111), and the front seat mounting cross beam (21) is connected with the threshold beams on the two sides through the connecting beams (2112).

5. The mid-body structure of claim 4, wherein:

the front floor upper longitudinal beam (11) extends along the front-back direction of the whole vehicle;

the two sides of the threshold beam are respectively provided with the front floor upper longitudinal beam (11) on one side close to the interior of the vehicle, and the connecting beams (2112) on each side are arranged across the front floor upper longitudinal beam (11) on the same side and are connected with the front floor upper longitudinal beam (11) on the same side.

6. The mid-body structure of claim 5, wherein:

connecting brackets (111) which are arranged vertically and correspondingly to the reinforcing cross beams (81) are arranged in the front floor upper longitudinal beams (11) on each side, and the reinforcing cross beams (81) are connected with the connecting brackets (111) on both sides through second screw connection assemblies (20).

7. The vehicle body intermediate structure according to any one of claims 1 to 6, characterized in that:

the front seat mounting cross beam (21) comprises a front seat front mounting cross beam (211) and a front seat rear mounting cross beam (212) which are arranged at intervals along the front-rear direction of the whole vehicle;

the battery pack (8) is internally provided with the reinforcing beam (81) corresponding to the front seat mounting beam (211) and the rear seat mounting beam (212).

8. The mid-body structure of claim 7, wherein:

also comprises a middle channel (3) extending along the front-back direction of the whole vehicle;

the front end of the middle channel (3) is connected with a front lower cross beam at the bottom of the front wall, and the rear end of the middle channel (3) is cut off to the front mounting cross beam (211) of the front row of seats and is connected with the front mounting cross beam (211) of the front row of seats;

the middle channel (3) is provided with a plurality of middle channel main bodies (30) which are sequentially connected along the left-right direction of the whole vehicle, and the cross section of each middle channel main body (30) is in a shape of a Chinese character 'ji'.

9. The mid-body structure of claim 8, wherein:

the front end of the middle channel (3) is provided with a front end part (31) with a cross section in a shape like a Chinese character 'ji', the front end part (31) is connected with the front lower cross beam, and the front end of each middle channel main body (30) is connected with the front end part (31); and/or the number of the groups of groups,

the middle channel (3) and the front floor panel (2) are integrally formed.

10. A vehicle, characterized in that:

the vehicle is provided therein with the vehicle body intermediate structure according to any one of claims 1 to 9.