CN221367210U - Car body upright post connecting structure and car - Google Patents

Abstract

The utility model provides a vehicle body upright post connecting structure and a vehicle, wherein the vehicle body upright post connecting structure comprises a connecting piece positioned at the root of a vehicle body upright post, and the vehicle body upright post is an A column, a B column or a C column in the vehicle body; the connecting piece integrated into one piece, just the connecting piece has the overlap joint to link firmly the inboard stand connecting portion of automobile body stand, the overlap joint links firmly the inboard threshold connecting portion of threshold roof beam, and connects stand connecting portion with the intermediate junction portion of threshold connecting portion, intermediate junction portion overlap joint is fixed the top of threshold roof beam. The vehicle body upright post connecting structure can increase the connecting rigidity and the collision force transmission capacity between the root of the vehicle body upright post and the threshold beam, and is beneficial to improving the safety of the whole vehicle collision.

Description

Car body upright post connecting structure and car

Technical Field

The utility model relates to the technical field of vehicle bodies, in particular to a vehicle body upright post connecting structure. The utility model also relates to a vehicle provided with the vehicle body upright post connecting structure.

Background

In a vehicle body, for a pillar structure in the body, such as an a pillar, the root portion thereof is generally connected to a rocker beam, and the upper portion thereof is connected to a roof side rail at the roof portion of the body in addition to a front wheel cover side rail, a front cowl cross member, and the like, to form a coherent body side frame structure. And to being connected between A post root and the threshold roof beam, adopt the welding mode at present mostly, dock the bottom of A post on the threshold roof beam, this kind of connected mode can realize being connected between A post and the threshold roof beam, nevertheless it also has A post root to connect rigidity weaker, and A post root connection easily became invalid when the vehicle collision causes the collision power transmission passageway between A post and the threshold roof beam to break, and is unfavorable for whole car collision security's promotion.

Disclosure of utility model

In view of the above, the present utility model aims to provide a vehicle body pillar connecting structure, which is beneficial to improving the safety of the whole vehicle collision.

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

a vehicle body upright post connecting structure comprises a connecting piece positioned at the root of a vehicle body upright post;

The connecting piece integrated into one piece, just the connecting piece has the overlap joint to link firmly the inboard stand connecting portion of automobile body stand, the overlap joint links firmly the inboard threshold connecting portion of threshold roof beam, and connects stand connecting portion with the intermediate junction portion of threshold connecting portion, intermediate junction portion overlap joint is fixed the top of threshold roof beam.

Further, the pillar connecting portion is formed with a receiving groove, and the vehicle body pillar portion is embedded in the receiving groove.

Further, a connecting flanging and a connecting via hole are arranged on one side of the upright post connecting part facing the front of the vehicle;

The connecting flange is fixedly connected to the vehicle body upright post in a lap joint mode, and the connecting through hole is used for the connecting structure connected with the vehicle body upright post to pass through.

Further, a connecting boss connected with the vehicle body cross beam is arranged on the threshold connecting part.

Further, a connecting groove is formed on the connecting boss, and the end part of the vehicle body cross beam is embedded into the connecting groove; and/or the number of the groups of groups,

The threshold connecting part is provided with a reinforcing rib connected with the connecting boss.

Further, the pillar connecting portion and the vehicle body pillar, and/or the rocker connecting portion and the intermediate connecting portion and the rocker are connected by rivets.

Further, the connecting piece is integrally cast and formed by adopting aluminum alloy.

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

According to the vehicle body upright post connecting structure, the integrally formed connecting piece is arranged at the root of the vehicle body upright post, and the connecting piece is provided with the upright post connecting part connected with the vehicle body upright post and the threshold connecting part connected with the threshold beam, so that the structural strength of the connecting piece can be ensured by utilizing an integrally formed mode, meanwhile, the connecting rigidity between the root of the vehicle body upright post and the threshold beam can be increased by utilizing the connection of the connecting piece between the root of the vehicle body upright post and the threshold beam, and the collision force transmission capacity between the vehicle body upright post and the threshold beam can be increased, thereby being beneficial to improving the safety of the whole vehicle collision.

In addition, the holding groove is formed in the upright post connecting part, so that the automobile body upright post part is embedded into the holding groove, the connection between the connecting piece and the automobile body upright post can be facilitated, and the reliability of the connection between the connecting piece and the automobile body upright post can be improved. The connecting flanging and the connecting through holes are formed in one side, facing the front of the vehicle, of the upright post connecting part, so that the reliability of connection between the front side vehicle body structure of the A column and the A column can be fully improved by means of the connecting piece, and meanwhile, the collision force can be dispersed downwards through the threshold Liang Chuandi of the connecting piece.

Secondly, set up the connection boss on the threshold connecting portion, can be convenient for be connected with the automobile body crossbeam, also can increase the reliability of being connected between connecting piece and the automobile body crossbeam. The connecting lug boss is provided with the connecting groove, so that the connection operation between the vehicle body cross beam and the connecting piece can be further facilitated, and the reliability of connection between the vehicle body cross beam and the connecting piece is improved. Through setting up the strengthening rib of being connected with the connection boss, can increase the structural strength who connects boss position with the help of the strengthening rib to guarantee the stability of automobile body crossbeam connection on connecting the boss better.

In addition, the door sill connecting part and the middle connecting part are connected with the door sill beam through rivets between the upright post connecting part and the automobile body upright post, so that the connecting operation can be conveniently carried out while the connecting effect is ensured, and the connecting cost is reduced. The aluminum alloy integrated casting forming is adopted for the connecting piece, so that the preparation of the connecting piece can be facilitated, the characteristics of low weight and high strength of the cast aluminum structure can be utilized, the light weight of the connecting piece is facilitated, and the structural strength of the connecting piece is ensured.

Another object of the present utility model is to provide a vehicle in which the vehicle body is provided with the vehicle body pillar connecting structure as described above.

Further, the vehicle body upright post is an A post;

The A column comprises an A column inner plate and an A column reinforcing plate which are buckled and connected together, an A column lower section reinforcing piece is arranged in a space formed by encircling the A column inner plate and the A column reinforcing plate, and the bottom of the A column lower section reinforcing piece is connected with the threshold beam.

Furthermore, the A column inner plate and the A column reinforcing plate are both made of carbon fiber composite materials, and/or the A column lower section reinforcing piece is made of aluminum profiles.

According to the vehicle, by arranging the vehicle body upright post connecting structure, the connecting rigidity between the root of the vehicle body upright post and the threshold beam can be increased, and the collision force transmission capacity between the vehicle body upright post and the threshold beam can be increased, so that the safety of the whole vehicle collision can be improved.

Furthermore, make A post contain lock A post inner panel and A post reinforcing plate together to set up A post hypomere reinforcement in the A post, and make the bottom of A post hypomere reinforcement with threshold roof beam connection, can further increase A post lower part rigidity, and the rigidity of connection between A post and the threshold roof beam.

And make A post inner panel and A post reinforcing plate adopt carbon fiber composite to make, can do benefit to the lightweight design and the design of molding of A post self to also can guarantee the structural strength of A post. The lower section reinforcing piece of the A column is made of aluminum profiles, so that weight reduction of the lower section reinforcing piece of the A column can be facilitated, and structural strength of the lower section reinforcing piece of the A column can be guaranteed.

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 an arrangement of a vehicle body pillar structure in a vehicle body according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 3 is a schematic view illustrating a configuration of a mounting groove according to an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a connector according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

FIG. 6 is a schematic view of the structure of FIG. 4 from another perspective;

FIG. 7 is a schematic view showing the constitution of the A column according to the embodiment of the present utility model;

FIG. 8 is a schematic view of an embodiment of the present utility model showing the placement of a lower reinforcement member of the A-pillar;

FIG. 9 is a schematic view of a lower section reinforcement of column A according to an embodiment of the present utility model;

reference numerals illustrate:

1. a column A; 2. a connecting piece; 3. a threshold beam; 4. a floor front cross member; 5. a rivet;

101. A column A inner plate; 102. a column A reinforcing plate; 103. a lower section reinforcement of the A column; 1a, through holes; 201. a column connecting portion; 2011. connecting and flanging; 2012. a connection via; 202. a threshold connecting portion; 203. an intermediate connection portion; 204. a connecting boss; 204a, a connecting groove; 205. reinforcing ribs; 2a, a containing groove;

M, an inner material removing area; a material removing area on the outer side; G. a part of the A column embedded in the accommodating groove; k. and a mounting groove.

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 embodiment relates to a vehicle body upright post connecting structure, which can increase the connecting rigidity between the root of a vehicle body upright post and a threshold beam 3, can increase the collision force transmission capacity between the vehicle body upright post and the threshold beam, and is beneficial to improving the collision safety of the whole vehicle.

In the overall structure, the vehicle body pillar connecting structure of the present embodiment includes the connecting member 2 at the root of the vehicle body pillar in the vehicle body, and the above-described vehicle body pillar may be generally an a pillar 1, a B pillar or a C pillar in the vehicle body.

Taking the vehicle body pillar as an a pillar as an example, in connection with the specific structure shown in fig. 1 to 6, the connector 2 of the present embodiment is integrally formed and has a pillar connecting portion 201 that is lap-jointed and fixedly connected to the inner side of the a pillar 1, a threshold connecting portion 202 that is lap-jointed and fixedly connected to the inner side of the threshold beam 3, and an intermediate connecting portion 203 that connects the pillar connecting portion 201 and the threshold connecting portion 202, and the intermediate connecting portion 203 is also lap-jointed and fixedly connected to the top of the threshold beam 3.

At this time, as set up above, through setting up integrated into one piece's connecting piece 2 at 1 root of A post to make connecting piece 2 be echelonment, and have the stand connecting portion 201 of being connected with A post 1, and the threshold connecting portion 202 that is connected with threshold roof beam 3, it not only can utilize integrated into one piece mode to guarantee the structural strength of connecting piece 2 self, also can utilize connecting piece 2 to be connected between 1 root of A post and threshold roof beam 3 simultaneously, increase 1 root of A post and connect rigidity, and then can reach the effect that increases collision force transfer ability between A post and the threshold roof beam 3.

Based on the above overall description, specifically, except for the a pillar 1, when the vehicle body pillar of the present embodiment is a B pillar or a C pillar in the vehicle body, the above-described arrangement of the connecting member 2 at the vehicle body pillar root portion and the connection between the connecting member 2 and the rocker 3 are all sufficient with reference to the related description in the present embodiment.

Taking the vehicle body pillar as the a-pillar 1 as an example, in this embodiment, with continued reference to fig. 3, the installation groove k is also defined between the connecting piece 2 and the a-pillar 1 by the connection of the connecting piece 2 at the root of the a-pillar 1, in particular, the arrangement of the threshold connecting portion 202 and the intermediate connecting portion 203 on the connecting piece 2. At this time, the front end of the rocker 3 is positioned in the installation groove k and is connected to the a-pillar 1 and the connector 2 at both sides.

In this embodiment, referring still to fig. 6, as a preferred embodiment, a receiving groove 2a is formed in the pillar connecting portion 201, and a portion denoted by reference numeral G of the a pillar 1 is fitted into the receiving groove 2a as shown in fig. 7. In this way, by forming the accommodation groove 2a on the column connecting portion 201 and making the a-pillar 1 partially embedded in the accommodation groove 2a, it can be understood that it can facilitate the connection between the connecting member 2 and the a-pillar 1 while also being able to increase the reliability of the connection between the connecting member 2 and the a-pillar 1.

In the present embodiment, as further shown in fig. 4, as a preferred embodiment, a connection flange 2011 and a connection via 2012 are also provided on the side of the pillar connecting portion 201 facing the front of the vehicle. The connection flange 2011 is fixed on the a-pillar 1 in a lap joint manner as shown in fig. 3, and the connection via 2012 is used for passing through a connection structure connected with the a-pillar 1.

At this time, by providing the connection flange 2011 and the connection via 2012 on the side of the pillar connecting portion 201 facing the front of the vehicle, it can be understood that it is possible to sufficiently increase the reliability of connection between the vehicle body structure on the front side of the a pillar 1 and the a pillar 1 by means of the connecting member 2, while it is also obviously helpful for the transmission and dispersion of the collision force to the lower rocker beam 3 via the connecting member 2, so as to promote the transmission effect of the collision force at the a pillar 1.

In the vehicle body, the vehicle body structure on the front side of the a pillar 1 may be, for example, a torsion box, a cowl lower cross member, or the like, and the connection structure may be, for example, a screw structure. Thus, the vehicle body structure located at the front side of the a-pillar 1 is connected to the a-pillar 1 by the screw structure, and the screw structure is connected to the a-pillar 1 through the connection via 2012 and the through hole 1a of the a-pillar 1.

In the present embodiment, as shown in fig. 4 and 5, as a preferred embodiment, a connecting boss 204 to be connected to a vehicle body cross member in a vehicle body is provided on the rocker connecting portion 201. In this way, by providing the connecting boss 204 on the rocker connecting portion 202, connection with the vehicle body cross member can be facilitated, and the reliability of connection between the connecting member 2 and the vehicle body cross member can also be increased.

In particular, it is preferable that the connection boss 204 further has a connection groove 204a, and a portion of the end of the vehicle body cross member is inserted into the connection groove 204a and then connected to the connector 2. At this time, it can be understood that by providing the connection groove 204a on the connection boss 204, it is obviously possible to further facilitate the connection operation between the vehicle body cross member and the connection member 2, and to increase the reliability of the connection therebetween.

It should be noted that, as also shown in fig. 1 and 2, when the vehicle body pillar is an a pillar 1, the vehicle body cross member may be, for example, a floor front cross member 4 in a vehicle body. Further, other portions of the vehicle body cross member end portion than the portion embedded in the connecting groove 204a may be lap-fixedly attached to the intermediate connecting portion 203.

In addition, based on the above arrangement of the connection boss 204, as a preferred embodiment, the present embodiment may also provide the reinforcing rib 205 connected to the connection boss 204 on the threshold connection portion 202, for example. In this way, by arranging the reinforcing ribs 205 connected with the connecting boss 204, the structural strength of the position of the connecting boss 204 can be increased by means of the reinforcing ribs 205, so that the stability of the connection of the vehicle body cross beam on the connecting boss 204 can be better ensured, and the transmission and dispersion of the collision force from the connecting piece 2 to the vehicle body cross beam can be facilitated.

In particular, the reinforcing ribs 205 may be located at the bottom of the connection boss 204, for example, and the reinforcing ribs 205 may be disposed in a plurality of side-by-side arrangement according to the wall thickness of the connection boss 204 and the groove width of the connection groove 204a, so as to ensure the disposition effect.

In this embodiment, as a preferred embodiment, in practice, the pillar connecting portion 201 of the connecting member 2 and the a-pillar 1, and the rocker connecting portion 202 and the intermediate connecting portion 203 and the rocker 3 may be connected by, for example, rivets 5. At this time, the pillar connecting portion 201 and the a-pillar 1, and the rocker connecting portion 202 and the intermediate connecting portion 203 and the rocker 3 are connected by the rivet 5, and it is understood that it is also convenient to perform the connecting operation while ensuring the connecting effect of the connecting member 2 with the a-pillar 1 and the rocker 3, while also contributing to a reduction in the connecting cost.

It should be noted that, in addition to the connection by using the rivet 5, in the specific implementation, the connection between the connecting piece 2 and the a-pillar 1 and the threshold beam 3 of the present embodiment may also be performed by using a screw connection or other conventional connection methods, so long as the connection effect between the connecting piece 2 and the a-pillar 1 and the threshold beam 3 can be ensured.

In this embodiment, in the case of the integrally molded connector 2, as a preferable embodiment, for example, the connector 2 may be integrally cast from an aluminum alloy. Thus, by integrally casting the connecting piece 2 with aluminum alloy, the connecting piece 2 can be conveniently prepared, and meanwhile, the characteristics of low weight and high strength of the cast aluminum structure can be utilized, so that the weight reduction of the connecting piece 2 is facilitated, and the structural strength of the connecting piece 2 can be ensured.

The connection structure of the a pillar 1 of this embodiment adopts the above structure, the connecting piece 2 that sets up through the automobile body stand root, make connecting piece 2 adopt the cast aluminium structure of integrative die-casting, and make connecting piece 2 have the stand connecting portion 201 of being connected with the automobile body stand, and the threshold connecting portion 202 of being connected with threshold roof beam 3, on one hand, its structural strength that can guarantee connecting piece 2 self, on the other hand also can utilize connecting piece 2 to be connected between automobile body stand root and threshold roof beam 3, can increase the connection rigidity between automobile body stand root and threshold roof beam 3, and increase the collision power transmission ability between automobile body stand and the threshold roof beam 3, and then be favorable to promoting the security of whole car collision.

Example two

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

In particular, in the vehicle of the present embodiment, the vehicle body pillar may be, for example, the a-pillar 1, and the a-pillar 1 of the present embodiment may be configured to include, for example, the a-pillar inner panel 101 and the a-pillar reinforcement panel 102 that are snap-coupled together, as shown in fig. 3, 7, and in combination with fig. 8. At the same time, in the space defined by the a-pillar inner panel 101 and the a-pillar reinforcement plate 102, that is, the a-pillar lower reinforcement 103 is also provided inside the a-pillar 1, and the bottom of the a-pillar lower reinforcement 103 is connected to the rocker 3.

At this time, by making the a-pillar 1 include the a-pillar inner panel 101 and the a-pillar reinforcing panel 102 that are fastened together, and providing the a-pillar lower reinforcement 103 in the a-pillar 1, and the bottom of the a-pillar lower reinforcement 103 is also connected to the rocker, it is apparent that it is possible to further increase the rigidity of the lower portion of the a-pillar 1, and to increase the connection rigidity between the a-pillar 1 and the rocker 3.

In this embodiment, as a preferred embodiment, the a-pillar inner panel 101 and the a-pillar reinforcing panel 102 may be made of, for example, a carbon fiber composite material. Thus, by making the a-pillar inner plate 101 and the a-pillar reinforcing plate 102 made of a carbon fiber composite material, it can be understood that it can utilize the characteristics of low weight, high strength, and easiness in modeling design of the carbon fiber structure, can facilitate the lightweight design and modeling design of the a-pillar 1 itself, and can also ensure the structural strength of the a-pillar 1.

Note that, when the a-pillar inner panel 101 and the a-pillar reinforcing panel 102 are made of a carbon fiber composite material, the a-pillar inner panel 101 and the a-pillar reinforcing panel 102, and the a-pillar inner panel 101 and the rocker 3 may be connected by structural adhesive. In addition, instead of being made of carbon fiber composite materials, the a-pillar inner plate 101 and the a-pillar reinforcing plate 102 may be made of conventional stamped sheet metal structures.

In a preferred embodiment, the lower section of the a-pillar reinforcement 103 located in the a-pillar 1 may be, for example, an aluminum profile. In addition, the aluminum profile is adopted for the lower section reinforcing member 103 of the A column, so that the weight of the lower section reinforcing member 103 of the A column can be reduced, and the structural strength of the lower section reinforcing member 103 of the A column can be ensured. In particular, the lower reinforcement 103 of the a pillar and the rocker 3 are generally connected by a screw or rivet structure passing through the a pillar inner panel 101.

It should be noted that, when the lower section of the a-pillar reinforcement 103 is made of an aluminum profile, in conjunction with the arrangement of the bottom end of the a-pillar 1 as shown in fig. 9, for example, positions indicated by reference numerals M and N on both inner and outer sides of the lower section of the a-pillar reinforcement 103 may be removed by a machining process after the lower section of the a-pillar reinforcement 103 is extruded. In this way, not only can the arrangement of the a-pillar lower reinforcement 103 in the a-pillar 1 be facilitated, but also the connection between the a-pillar lower reinforcement 103 and the rocker 3 can be facilitated.

When the a-pillar lower reinforcement 103 is provided in the a-pillar 1, the vehicle body structure located on the front side of the a-pillar 1 can be directly connected to the a-pillar lower reinforcement 103 through the connection via 2012 and the through hole 1 a. Thus, it is not only convenient to form a connection fitting structure such as a screw hole or the like on the a-pillar 1, but also ensures the stability of the connection between the a-pillar 1 and the peripheral structure.

The vehicle of this embodiment can increase the connection rigidity between the vehicle body upright post root and the threshold beam 3 through setting up the vehicle body upright post connection structure in embodiment one, also can increase the collision force transmission ability between vehicle body upright post and the threshold beam 3, and it is favorable to promoting the collision security of whole car, 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 car body upright post connecting structure is characterized in that:

Comprises a connecting piece (2) positioned at the root of a vehicle body upright post;

the connecting piece (2) is integrally formed, the connecting piece (2) is provided with a vertical column connecting part (201) fixedly connected to the inner side of a vertical column of the vehicle body, a threshold connecting part (202) fixedly connected to the inner side of a threshold beam (3) in a lap joint mode, and an intermediate connecting part (203) for connecting the vertical column connecting part (201) and the threshold connecting part (202), wherein the intermediate connecting part (203) is fixedly connected to the top of the threshold beam (3) in a lap joint mode.

2. The vehicle body pillar connecting structure according to claim 1, characterized in that:

The pillar connecting portion (201) is formed with a receiving groove (2 a), and the vehicle body pillar portion is fitted into the receiving groove (2 a).

3. The vehicle body pillar connecting structure according to claim 2, characterized in that:

A connecting flanging (2011) and a connecting via hole (2012) are arranged on one side of the upright post connecting part (201) facing the front of the vehicle;

The connecting flange (2011) is fixedly connected to the vehicle body upright post in a lap joint mode, and the connecting through hole (2012) is used for allowing a connecting structure connected with the vehicle body upright post to pass through.

4. The vehicle body pillar connecting structure according to claim 1, characterized in that:

The threshold connecting part (202) is provided with a connecting boss (204) connected with the vehicle body cross beam.

5. The vehicle body pillar connecting structure according to claim 4, characterized in that:

The connecting boss (204) is provided with a connecting groove (204 a), and the end part of the vehicle body cross beam is embedded into the connecting groove (204 a); and/or the number of the groups of groups,

The threshold connecting part (202) is provided with a reinforcing rib (205) connected with the connecting boss (204).

6. The vehicle body pillar connecting structure according to claim 1, characterized in that:

The pillar connecting portion (201) and the vehicle body pillar, and/or the rocker connecting portion (202) and the intermediate connecting portion (203) and the rocker (3) are connected by rivets (5).

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

The connecting piece (2) is integrally cast and formed by adopting aluminum alloy.

8. A vehicle, characterized in that:

the vehicle body in which the vehicle body pillar connecting structure according to any one of claims 1 to 7 is provided.

9. The vehicle according to claim 8, characterized in that:

The automobile body upright post is an A post (1);

The A column (1) comprises an A column inner plate (101) and an A column reinforcing plate (102) which are buckled and connected together, an A column lower section reinforcing piece (103) is arranged in a space formed by encircling the A column inner plate (101) and the A column reinforcing plate (102), and the bottom of the A column lower section reinforcing piece (103) is connected with the threshold beam (3).

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

The A column inner plate (101) and the A column reinforcing plate (102) are made of carbon fiber composite materials, and/or the A column lower section reinforcing piece (103) is made of aluminum profiles.