CN221049784U - Torsion box assembly and vehicle - Google Patents

Abstract

The utility model provides a torsion box assembly and a vehicle, wherein the torsion box assembly comprises torsion boxes respectively arranged at the left side and the right side, and a connecting plate connected between the torsion boxes at the two sides; the torsion boxes on the two sides are provided with connecting parts which are at least connected with the longitudinal beam of the front engine room, the threshold beam and the lower plate of the front coaming; the torsion boxes at two sides are made of plate bodies formed by integral hot press molding, or the torsion boxes at two sides and the connecting plate are made of plate bodies formed by integral hot press molding. According to the utility model, the torsion box is integrally formed by hot pressing, or the torsion box and the connecting plate are integrally formed by hot pressing, so that the integral design of the torsion box or the assembly on both sides can be realized, the number of parts of the assembly can be reduced, the welding process is reduced, and the manufacturing cost of the whole automobile can be reduced.

Description

Torsion box assembly and vehicle

Technical Field

The utility model relates to the technical field of vehicle bodies, in particular to a torsion box assembly. The utility model also relates to a vehicle provided with the torsion box assembly.

Background

In the related art, a conventional torsion box assembly for a vehicle body is generally formed by a plurality of sheet metal parts through a welding process, and each sheet metal part is formed by cold stamping or hot forming stamping. The existing torsion box structure is numerous in parts, all parts are required to be punched and manufactured independently, the cost of the parts of the torsion box is high, and meanwhile, the parts are required to be connected through spot welding or two-welding, the whole processing cost of the torsion box is high, so that the reduction of the manufacturing cost of the whole torsion box is not facilitated.

Disclosure of utility model

In view of the above, the present utility model is directed to a torsion box assembly to help reduce the manufacturing cost of the whole vehicle.

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

The torsion box assembly comprises torsion boxes respectively arranged at the left side and the right side, and a connecting plate connected between the torsion boxes at the two sides;

the torsion boxes on the two sides are provided with connecting parts which are at least connected with the longitudinal beam of the front engine room, the threshold beam and the lower plate of the front coaming;

The torsion boxes at two sides are made of plate bodies formed by integral hot press molding, or the torsion boxes at two sides and the connecting plate are made of plate bodies formed by integral hot press molding.

Further, an inner cavity is formed in the connecting plate, and the inner cavity penetrates through the cavities in the torsion boxes at the two sides;

The edges of the torsion box on each side form connecting parts respectively connected with the front cabin longitudinal beam, the threshold beam and the dash panel lower plate.

Further, the plate bodies of the torsion boxes at the two sides are formed by a plurality of plate pieces welded together by laser, and/or the torsion boxes at the two sides are connected with the connecting plate by laser welding.

Further, the plate thickness t2 of the torsion box is larger than the plate thickness t1 of the connecting plate, and the plate thickness t2 of the torsion box further satisfy:

t1 is more than or equal to 0.8 and less than 1.2mm, and t2 is more than or equal to 1.2mm; or alternatively

T2/t1 is more than 1 and less than or equal to 1.5; or alternatively

t2≤1.5*t1。

Further, the bottom of the connecting plate is provided with a plane extending along the left-right direction of the whole vehicle, and the bottoms of the two sides of the torsion box, which are close to one side of the connecting plate, are provided with inclined planes;

The inclined planes at both sides are all in the left and right directions of the whole vehicle, and are arranged in a declining way along the direction pointing to the outside of the vehicle, and the included angle alpha between the plane and each side of the inclined planes meets the following conditions: alpha is more than or equal to 150 degrees.

Further, a reinforcement is included;

The reinforcement includes torsion box reinforcing plates disposed in the torsion boxes on each side, and sub-frame mounting structures at each torsion box are connected with the torsion box reinforcing plates.

Further, the reinforcement member includes a reinforcement bracket provided on the connection plate, and the reinforcement bracket is provided to extend in the front-rear direction of the vehicle.

Further, the reinforcing brackets are arranged at intervals along the left-right direction of the whole vehicle; and/or the reinforcing support is integrally formed by hot pressing, and a cavity is formed between the reinforcing support and the connecting plate in an enclosing mode.

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

According to the torsion box assembly, the torsion boxes are integrally formed through hot pressing, or the torsion boxes and the connecting plates are integrally formed through hot pressing, so that the integral design of the torsion boxes at two sides or the integral torsion box assembly can be realized, the number of parts of the assembly can be reduced, the cost of the parts is reduced, the welding procedure is reduced, and the processing cost is reduced, thereby being beneficial to reducing the manufacturing cost of the whole automobile.

In addition, form the inner chamber in the connecting plate to link up with the die cavity in the torsion box of both sides, the great characteristics of usable cavity structural strength guarantees the holistic structural strength of torsion box assembly, especially can promote the transverse support and the collision force transmission ability of torsion box assembly in whole car. The edge of the torsion box forms a connecting part connected with the longitudinal beam of the front engine room, the threshold beam and the lower plate of the front coaming, so that the forming of the connecting part can be facilitated, and meanwhile, the connection with the longitudinal beam of the front engine room, the threshold beam and the lower plate of the front coaming can be facilitated. The plate body of the formed torsion box consists of a plurality of plate pieces welded by laser, and the plate materials or thicknesses of different parts on the torsion box can be conveniently adjusted.

And secondly, the torsion boxes on two sides are connected with the connecting plate through laser splice welding, so that the connection strength between the torsion boxes on two sides and the connecting plate can be ensured, and the hot press processing of the torsion boxes and the connecting plate after splice welding connection can be facilitated, so that the torsion box assembly structure is formed. Through the relative setting to connecting plate and torsion box thickness, can satisfy its lightweight and processing feasibility etc. requirement on the basis of guaranteeing torsion box assembly structural performance. Through the setting of the contained angle between connecting plate bottom plane and torsion box bottom inclined plane, can avoid because of appearing the profile between torsion box and the connecting plate and change sharply, cause the power between the two not smooth, influence collision security.

In addition, the reinforcement includes the torsion box reinforcing plate that is arranged in the torsion box to make the torsion box reinforcing plate be connected with auxiliary frame mounting structure, can increase the structural strength of torsion box position, also can increase the dynamic stiffness of auxiliary frame mounting point. The reinforcement comprises a reinforcement bracket which is arranged on the connection plate and along the front-back direction of the whole vehicle, the connection plate can be reinforced in the front-back direction of the whole vehicle, and the reinforcement bracket can play a role in supporting the whole vehicle in front and back during collision, so that the deformation of the connection plate is avoided, and the survival space of members in a driving cabin is influenced. The reinforcing support sets up to a plurality ofly, can guarantee its effect of strengthening to the connecting plate position, and the integrative hot briquetting of reinforcing support can do benefit to its preparation to and increase its structural strength, form the cavity between reinforcing support and the connecting plate, also the characteristics that cavity structural strength is big are also available, further guarantee the effect of strengthening of reinforcing support.

Another object of the present utility model is to propose a vehicle having a torsion box assembly as described above in its body;

Each side the torsion box all with the homonymy front cabin longeron with the threshold roof beam links to each other, and both sides the torsion box with the connecting plate all is connected the bottom of dash board hypoplastron.

Further, the rear ends of the torsion boxes at the two sides are connected with the front floor panel; and/or, the front cabin longitudinal beam and the torsion box at each side form a herringbone structure together with the connecting plate.

The vehicle provided by the utility model is provided with the torsion box assembly, so that the cost of torsion box parts can be reduced, the processing cost of the torsion box is reduced, and the manufacturing cost of the whole vehicle is reduced.

Moreover, the rear end of the torsion box is connected with the front floor panel, so that the structural strength of the front end position of the front floor panel can be increased, and the overall rigidity of the front part of the vehicle body can be improved. The front cabin longitudinal beam and the torsion box form a herringbone structure together with the connecting plate, so that the collision force from the front cabin longitudinal beam is transmitted and dispersed to the rear, and the collision safety of the whole vehicle can be improved.

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 torsion box assembly according to an embodiment of the present utility model disposed in a vehicle body;

FIG. 2 is a schematic view of a torsion box assembly (bottom view) according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a torsion box assembly (top view) according to an embodiment of the present utility model;

FIG. 4 is a schematic view illustrating an angle between a bottom plane of a connecting plate and a bottom inclined plane of a torsion box according to an embodiment of the present utility model;

FIG. 5 is a schematic view of an arrangement of stiffeners according to an embodiment of the utility model;

FIG. 6 is a schematic view of a torsion box stiffener according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of a subframe mounting structure according to an embodiment of the present utility model;

FIG. 8 is a schematic structural view of a first reinforcing bracket according to an embodiment of the present utility model;

FIG. 9 is a schematic structural view of a second reinforcing bracket according to an embodiment of the present utility model;

FIG. 10 is an enlarged view of a portion of the position A of FIG. 1;

FIG. 11 is a schematic view of a torque box assembly according to an embodiment of the present utility model in a crash force transmission during a frontal collision of a vehicle;

Reference numerals illustrate:

1. A torsion box; 2. a connecting plate; 3. a front cabin rail; 4. a threshold beam; 5. a dash lower panel; 6. a front floor panel; 7. torsion box reinforcing plate; 8. reinforcing the support; 9. an auxiliary frame mounting structure;

1a, a longitudinal beam connecting part; 1b, a threshold beam connecting part; 1c, a dash panel lower panel connecting part; 801. a first reinforcing bracket; 802. a second reinforcing bracket;

w, plane; x, inclined plane; m, a cavity; n, inner cavity.

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.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. 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.

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 torsion box assembly, which is located at a joint position between a front cabin and a front floor in a vehicle body, and specifically located below a front wall assembly, so as to serve as a connection member for connecting peripheral components such as a front cabin longitudinal beam 3, a vehicle body front wall assembly, and a threshold beam 4.

In the overall design, as shown in fig. 1 to 3, the torsion box assembly of the present embodiment includes torsion boxes 1 disposed on the left and right sides, and a connection plate 2 connected between the torsion boxes 1 on the two sides.

Wherein, both sides torsion box 1 has the connecting portion that is connected with at least front cabin longeron 3, threshold roof beam 4, and dash panel hypoplastron 5 in the automobile body front wall assembly. Meanwhile, the two-side torsion boxes 1 are made of integrally hot-pressed plate bodies, or the two-side torsion boxes 1 and the connecting plate 2 can be made of integrally hot-pressed plate bodies.

At this time, the above structure makes the integrative hot briquetting of torsion box 1, perhaps makes torsion box 1 and connecting plate 2 integrative hot briquetting together, and this embodiment alright realize the holistic integrated design of both sides torsion box 1 or whole torsion box assembly, can reduce assembly spare part quantity, reduces spare part cost, reduces welding procedure, and then can reach the effect of reducing its cost of preparation.

Based on the above overall description, specifically, when the both-side torsion box 1 is made of the integrally hot-formed plate body, it has an advantage of good formability in spite of a low degree of integration, compared to when the both-side torsion box 1 and the connection plate 2 are made of the integrally hot-formed plate body together. In the specific implementation, one of the two molding modes is selected based on design requirements.

In addition, as a preferred embodiment, the plate body of the molded two-sided torque box 1 may be formed, for example, by a plurality of plate pieces welded together by laser welding. Therefore, the plate body of the formed torsion box 1 is formed by a plurality of plate pieces welded by laser, and the plate pieces can be convenient for adjusting the plate materials or thicknesses of different parts on the torsion box 1 so as to meet the design requirement on the structural performance of the torsion box 1.

For example, in this embodiment, the torsion boxes 1 on both sides and the connecting plate 2 in the middle are connected by laser splice welding. Like this, through making link to each other through laser splice welding between torsion box 1 and the connecting plate 2 in both sides, can guarantee the joint strength between torsion box 1 and the connecting plate 2 in both sides, also can do benefit to and carry out hot pressing to torsion box 1 and connecting plate 2 after splice welding connection to shaping torsion box assembly structure.

It should be noted that, in addition to the fact that the torsion box 1 on both sides can be made up of a plurality of plate members that are laser splice welded together, the torsion box 1 on both sides can be connected to the connection plate 2 by laser splice welding. Of course, in the embodiment, for example, the laser splice welding plate can be replaced by a thick plate, so that the torsion box assembly of the embodiment is formed by stamping a complete plate body, and the thickness difference between different positions of the thick plate is utilized, so that the thickness requirements of the torsion box 1 and the connecting plate 2 can be met.

It should be noted that when the differential plate is used, although the thickness requirement of different positions in the torsion box assembly can be met, the requirement of different materials of different positions in the assembly is difficult to realize, so when the differential plate is used in specific implementation, the laser splice welding plate should be used for preparing the torsion box 1 and the torsion box assembly when the requirements of the materials of various parts or different positions in the torsion box assembly exist.

In this embodiment, as a preferred embodiment, as shown in fig. 3, in the implementation, for example, the cross section of the connection plate 2 may be designed to be "U" and an inner cavity N is formed in the connection plate 2 based thereon, and further, the inner cavity N in the connection plate 2 may be configured to be capable of penetrating the cavity M in the torsion box 1 on both sides.

Therefore, through forming the inner cavity N in the connecting plate 2 and communicating with the cavity M in the torsion box 1 at two sides, the characteristic of high structural strength of the cavity can be utilized to ensure the overall structural strength of the torsion box assembly, and particularly, the transverse (left-right direction of the whole vehicle) supporting and collision force transmitting capacity of the torsion box assembly in the whole vehicle can be improved.

As also shown in fig. 3, the edges of the side torsion boxes 1 in the present embodiment form connection portions respectively with the front cabin side members 3, the rocker beams 4, and the dash lower panel 5, and a side member connection portion 1a for connecting the front cabin side members 3, a rocker beam connection portion 1b for connecting the rocker beams 4, and a dash lower panel connection portion 1c for connecting the dash lower panel 5 may be provided on the torsion boxes 1 on the respective sides as shown in fig. 3.

It will be appreciated that by forming the edges of the torsion box 1 into the connection portions with the front cabin side members 3, the rocker beams 4 and the dash lower panel 5, the formation of the above-described connection portions can be facilitated, and at the same time, the connection between the torsion box 1 and the front cabin side members 3, the rocker beams 4 and the dash lower panel 5 can be facilitated.

In this embodiment, the torsion box 1 and the connection plate 2 may be generally made of hot-formed steel, or ultra-high strength steel may be selected for the preparation of the torsion box 1 and the connection plate 2 in addition to hot-formed steel. In addition, for convenience of description, if the plate thickness of the connection plate 2 is referred to as t1 and the plate thicknesses of the torsion boxes 1 on both sides are referred to as t2, in this case, as a preferable embodiment, the plate thickness t2 of the torsion box 1 should be made larger than the plate thickness t1 of the connection plate 2, and the plate thickness t1 of the connection plate 2 and the plate thickness t2 of the torsion box 1 should also satisfy one of the following a-c items:

a.0.8≤t1＜1.2mm，t2≥1.2mm；b.1＜t2/t1≤1.5；c.t2≤1.5*t1。

In the item a, the thickness t2 of the torsion box 1 is made to be more than 1.2mm, so that the structural strength of the torsion box 1 can be ensured, and particularly, the torsion box 1 can be used as a mounting point of the auxiliary frame. The thickness t1 of the connecting plate 2 is designed below 1.2mm and above 0.8mm, which can be matched with the left and right force transmission of the connecting plate 2, namely the function of improving the front rigidity of the front floor, and can meet the requirement of thermoforming processing of the connecting plate 2.

In a specific embodiment, the thickness t2 of the torsion box 1 may be, for example, 1.2mm, 1.3mm, 1.4mm, or 1.5mm, and the thickness t1 of the connection plate 2 may be, for example, 0.8mm, 0.9mm, 1.0mm, or 1.1 mm.

In the item b, the plate thickness t1 of the connecting plate 2 and the plate thickness t2 of the torsion box 1 are enabled to meet the requirement of 1 < t2/t1 less than or equal to 1.5, and the plate thickness requirement of the torsion box 1 and the connecting plate 2 and the structural performance thereof are met, so that the two plates have better light weight effect. In the above item c, the thickness t1 of the connecting plate 2 and the thickness t2 of the torsion box 1 are made to satisfy t2 less than or equal to 1.5×t1, which can avoid the problem that the laser splice welding position between the torsion box 1 and the connecting plate 2 has poor connection strength due to overlarge thickness difference between the two.

Based on the above description of the plate thickness t1 of the connection plate 2 and the plate thickness t2 of the torsion box 1, the thickness may be selected according to the specific design requirements when the torque box is to be implemented. Moreover, it can be understood that, through the related arrangement of the thicknesses of the connecting plate 2 and the torsion box 1, the requirements of light weight, feasibility of processing and the like can be met on the basis of ensuring the structural performance of the torsion box assembly, and the torsion box assembly of the embodiment can have better application effect.

In this embodiment, as further shown in fig. 4, a plane w extending in the left-right direction of the whole vehicle is provided at the bottom of the connection plate 2, and an inclined surface x is provided at the bottom of the side of the torsion box 1 near the connection plate 2 at both sides. The inclined planes x on the two sides are all arranged in the left-right direction of the whole vehicle in a declining way along the direction pointing to the outside of the vehicle, and as a preferable implementation form, the included angle alpha between the plane w and the inclined planes x on the two sides can be set to satisfy the following conditions: alpha is more than or equal to 150 degrees.

In this case, the angle α may be 150 °, 155 °, 160 °, 165 °, or the like. Moreover, through setting up contained angle alpha between plane w and the inclined plane x of torsion box 2 bottom to the connecting plate 2 bottom, can avoid because of appearing the profile between torsion box 1 and the connecting plate 2 and change sharply, cause the unsmooth, and influence collision security of transmission between the two.

As further shown in fig. 5, as a preferred embodiment, the torsion box assembly of the present embodiment further includes a reinforcement member, and the reinforcement member may include, for example, torsion box reinforcement plates 7 provided in each side torsion box 1, and the subframe mounting structure 9 at each torsion box 1 is also connected with the torsion box reinforcement plates 7. In this way, the above-mentioned reinforcing member is made to include the torsion box reinforcing plate 7 in the torsion box 1, and the torsion box reinforcing plate 7 is made to be connected with the subframe mounting structure 9, which can increase the structural strength of the position of the torsion box 1, and also can increase the dynamic stiffness of the subframe mounting point.

In a specific implementation, the torsion box reinforcement plate 7 may be as shown in fig. 6, and the torsion box reinforcement plate 7 may be disposed in the torsion box 1 by welding, and at the same time, the subframe mounting structure 9 located at the torsion box 1 may be as shown in fig. 7, for example, a connection sleeve may be used, and the bottom of the connection sleeve is welded and fixed on the torsion box 1, and the top of the connection sleeve is welded and fixed on the torsion box reinforcement plate 7.

As also shown in fig. 5, the reinforcement of the present embodiment also further includes a reinforcement bracket 8 provided on the connection plate 2, and the reinforcement bracket 8 is also provided extending in the front-rear direction of the entire vehicle. At this time, the reinforcement member also includes a reinforcement bracket 8 located on the connection board 2 and disposed along the front-rear direction of the whole car, which can strengthen the connection board 2 in the front-rear direction of the whole car and play a role in supporting the connection board 2 in front-rear during collision, so as to avoid deformation of the connection board 2 and influence on survival space of members in the driving cabin.

In the embodiment, the reinforcing brackets 8 may be preferably a plurality of reinforcing brackets arranged on the connecting plate 2 at intervals along the left-right direction of the whole vehicle, and each reinforcing bracket 8 may be fixed in the inner cavity N in the connecting plate 2 by welding. By arranging the reinforcing brackets 8 in a plurality, it is apparent that they can secure their reinforcing effect on the position of the connection plate 2.

In the present embodiment, the plurality of reinforcing brackets 8 may include, for example, a first reinforcing bracket 801 shown in fig. 8 and a second reinforcing bracket 802 shown in fig. 9, respectively. An exemplary number and placement of the first stiffening struts 801 and the second stiffening struts 802 is also shown in fig. 5. In addition, in the embodiment, each reinforcing bracket 8 may be preferably integrally formed by hot pressing, and a cavity may be formed between each reinforcing bracket 8 and the connecting plate 2.

At this time, the reinforcing bracket 8 is integrally formed by hot press, which is advantageous for its preparation and increases its structural strength. By forming a cavity between the reinforcing bracket 8 and the connecting plate 2, the reinforcing effect of the reinforcing bracket 8 can be further ensured by utilizing the characteristic of high structural strength of the cavity.

The torsion box assembly of this embodiment adopts above structure, through making torsion box 1 integrative hot briquetting, perhaps makes torsion box 1 and connecting plate 2 integrative hot briquetting together, and it can realize the holistic integrated design of both sides torsion box 1 or whole torsion box assembly, can reduce assembly spare part quantity, reduces spare part cost, reduces welding procedure, reduces processing cost, and is favorable to reducing the manufacturing cost of whole car.

Example two

This embodiment relates to a vehicle having a torsion box assembly of the first embodiment disposed in the body of the vehicle, as also shown in fig. 1.

In the torsion box assembly, each side torsion box 1 is connected with the front cabin longitudinal beam 3 and the threshold beam 4 on the same side, and the torsion boxes 1 and the connecting plates 2 on two sides are connected to the bottom of the dash lower plate 5.

Further, as a preferred embodiment, as shown in fig. 10, the present embodiment may also be such that the rear ends of both side torsion boxes 1 are connected to the front floor panel 6. The connection portion between the torsion box 1 and the front floor panel 6 may be, for example, a position indicated by reference numeral B in fig. 10, and by connecting the rear ends of the torsion boxes 1 on each side with the front floor panel 6, it is also possible to increase the structural strength of the front end position of the front floor panel 5, contributing to the improvement of the overall rigidity of the front portion of the vehicle body.

In this embodiment, as further shown in fig. 11, as a preferred embodiment, the side front cabin stringers 3 and the torsion box 1 each also form a "chevron" structure together with the connection plate 2. In this way, by enabling the front cabin longitudinal beam 3 and the torsion box 1 to form a herringbone structure together with the connecting plate 2, the front cabin longitudinal beam can facilitate the transmission and dispersion of collision force from the front cabin longitudinal beam 3 to the rear door sill beam 3, the middle channel and the like, so that the collision safety of the whole vehicle can be improved.

The vehicle of this embodiment is through setting up torsion box assembly in embodiment one, and it can reduce torsion box 1 spare part cost, reduces torsion box 1 processing cost, is favorable to reducing whole car's manufacturing cost, 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 torsion box assembly, characterized in that:

Comprises torsion boxes (1) which are respectively arranged at the left side and the right side, and a connecting plate (2) which is connected between the torsion boxes (1) at the two sides;

The torsion boxes (1) on both sides are provided with connecting parts which are at least connected with the front cabin longitudinal beam (3), the threshold beam (4) and the front coaming lower plate (5);

The torsion boxes (1) on two sides are made of integrally hot-pressed plate bodies, or the torsion boxes (1) on two sides and the connecting plate (2) on two sides are made of integrally hot-pressed plate bodies.

2. The torque box assembly of claim 1, wherein:

An inner cavity (N) is formed in the connecting plate (2), and the inner cavity (N) is communicated with the cavities (M) in the torsion boxes (1) at two sides;

The edges of the torsion box (1) on each side form connecting parts respectively connected with the front cabin longitudinal beam (3), the threshold beam (4) and the dash panel lower plate (5).

3. The torque box assembly of claim 1, wherein:

The plate bodies of the torsion boxes (1) on the two sides are formed by a plurality of plate pieces welded together by laser, and/or the torsion boxes (1) on the two sides are connected with the connecting plate (2) by laser welding.

4. The torque box assembly of claim 1, wherein:

The plate thickness t2 of the torsion box (1) is larger than the plate thickness t1 of the connecting plate (2), and the plate thickness t1 of the connecting plate (2) and the plate thickness t2 of the torsion box (1) also satisfy:

t1 is more than or equal to 0.8 and less than 1.2mm, and t2 is more than or equal to 1.2mm; or alternatively

T2/t1 is more than 1 and less than or equal to 1.5; or alternatively

t2≤1.5*t1。

5. The torque box assembly of claim 1, wherein:

The bottom of the connecting plate (2) is provided with a plane (w) extending along the left-right direction of the whole vehicle, and the bottoms of the two sides of the torsion box (1) close to one side of the connecting plate (2) are provided with inclined planes (x);

Both sides inclined plane (x) all in the whole car left and right directions, along the direction decline setting outside the directional car, just plane (w) and each side contained angle alpha between inclined plane (x) satisfies: alpha is more than or equal to 150 degrees.

6. The torque box assembly according to any one of claims 1 to 5, wherein:

Further comprising a stiffener;

The reinforcement comprises torsion box reinforcing plates (7) arranged in the torsion boxes (1) at each side, and a subframe mounting structure (9) at each torsion box (1) is connected with the torsion box reinforcing plates (7).

7. The torque box assembly of claim 6, wherein:

The reinforcing piece comprises a reinforcing support (8) arranged on the connecting plate (2), and the reinforcing support (8) extends along the front-back direction of the whole vehicle.

8. The torque box assembly of claim 7, wherein:

The reinforcing brackets (8) are arranged at intervals along the left-right direction of the whole vehicle; and/or the reinforcing support (8) is integrally formed by hot pressing, and a cavity is formed between the reinforcing support and the connecting plate (2) in an enclosing mode.

9. A vehicle, characterized in that:

A torsion box assembly according to any one of claims 1 to 8 provided in a body of the vehicle;

Each side the torsion box (1) is connected with the front cabin longitudinal beam (3) and the threshold beam (4) on the same side, and the torsion box (1) and the connecting plate (2) on two sides are connected to the bottom of the front coaming lower plate (5).

10. The vehicle according to claim 9, characterized in that:

The rear ends of the torsion boxes (1) at the two sides are connected with a front floor panel (6); and/or the front cabin longitudinal beam (3) and the torsion box (1) on each side form a herringbone structure together with the connecting plate (2).