CN219838619U - Torsion box and vehicle - Google Patents

Abstract

The utility model discloses a torsion box and a vehicle, wherein the torsion box comprises: a side member connecting portion adapted to be connected with a front side member; the A column connecting part is suitable for being connected with the A column; the front wall beam connecting part is suitable for being connected with the front wall beam; wherein, torsion box is integrated into one piece structure. According to the torsion box, the longitudinal beam connecting part, the A column connecting part and the front wall cross beam connecting part are arranged, so that the front longitudinal beam, the A column and the front wall cross beam can be effectively connected, and the stability of connecting the longitudinal beam with a passenger cabin is improved. The torsion box is of an integrated structure, so that the overall structural strength of the torsion box is convenient to strengthen, and the torsion box is constructed into an integrated structure, thereby being beneficial to reducing the weight of the torsion box.

Description

Torsion box and vehicle

Technical Field

The utility model relates to the technical field of vehicle manufacturing, in particular to a torsion box and a vehicle.

Background

At present, the connection of the longitudinal beam and the front cabin structure is single and dispersive, the longitudinal beam and other structures of the front cabin are not integrated, the stability of the connection of the longitudinal beam and the passenger cabin is reduced, and the connection structure is heavy, so that the light weight of the whole vehicle is not facilitated.

Disclosure of Invention

The utility model aims to provide a vehicle front cabin structure and a novel technical scheme of a vehicle, which at least can solve the problems that a longitudinal beam and other structures of a front cabin are not integrated, the stability is poor, the connecting structure is heavy and the like in the prior art.

In a first aspect of the present utility model, there is provided a torsion box comprising: a side member connecting portion adapted to be connected with a front side member; the A column connecting part is suitable for being connected with the A column; the front wall beam connecting part is suitable for being connected with the front wall beam; wherein, torsion box is integrated into one piece structure.

Alternatively, the cross-sectional area of the torsion box gradually increases from the front to the rear of the vehicle.

Optionally, the cross section of the longitudinal beam connecting part is of a Chinese character 'ri' shaped structure.

Optionally, in the vehicle front-rear direction, the side member connecting portion is located on a front side of the a-pillar connecting portion and the cowl cross member connecting portion.

Optionally, in the left-right direction of the vehicle, the a-pillar connecting portion and the cowl cross member connecting portion are located on both sides of the side member connecting portion.

Optionally, the torsion box further includes a plurality of first reinforcing ribs and a torsion box body, wherein the first reinforcing ribs are connected with the torsion box body and form a plurality of semi-closed cavities.

Optionally, the plurality of first reinforcing ribs are respectively connected with the longitudinal beam connecting part and the A column connecting part.

Optionally, the longitudinal beam connecting portion is provided with a longitudinal beam connecting cavity, and a projection of the first reinforcing rib in the vehicle front-rear direction and a projection of the longitudinal beam connecting portion cavity in the vehicle front-rear direction at least partially overlap.

Optionally, the torsion box further includes a plurality of second strengthening ribs, in the left and right direction of the vehicle, the second strengthening ribs and the first strengthening ribs are located respectively in opposite sides of the longitudinal beam connecting portion, the second strengthening ribs are connected with the torsion box body, and a plurality of semi-closed cavities are formed.

Optionally, the longitudinal beam connecting portion is provided with a longitudinal beam connecting cavity, and a projection of the second reinforcing rib in the vehicle front-rear direction at least partially overlaps with a projection of the longitudinal beam connecting cavity in the vehicle front-rear direction.

Optionally, in the vehicle up-down direction, the longeron connecting portion is provided with at least one longeron and connects the cavity, the longeron connects the cavity and has roof and diapire, first strengthening rib the second strengthening rib all is located the roof place the plane with the diapire place between the plane.

Optionally, the a-pillar connecting portion is provided with a first mounting surface extending in a left-right direction of the vehicle, and a second mounting surface extending in a front-rear direction of the vehicle, and the first mounting surface and the second mounting surface are both adapted to be connected with the a-pillar.

Optionally, the torsion box further includes a third reinforcing rib, at least a portion of the third reinforcing rib is connected to the second mounting surface, and the third reinforcing rib is disposed on a side of the torsion box body away from the stringer connecting portion.

In a second aspect of the present utility model, there is provided a vehicle comprising:

the torsion box as described in the above embodiment;

the front longitudinal beam is connected with the longitudinal beam connecting part and is connected with the front coaming through the torsion box;

the A column is connected with the connecting part of the A column;

the front wall cross beam, the front wall cross beam connecting portion is connected with the front wall cross beam.

Optionally, the first mounting surface and the second mounting surface of the a-pillar connecting portion form an L-shaped extension surface, and the torsion box is connected with the a-pillar on the L-shaped extension surface.

According to the torsion box, the longitudinal beam connecting part, the A column connecting part and the front wall cross beam connecting part are arranged, so that the front longitudinal beam, the A column and the front wall cross beam can be effectively connected, and the stability of connecting the longitudinal beam with a passenger cabin is improved. The torsion box is of an integrated structure, so that the overall structural strength of the torsion box is convenient to strengthen, and the torsion box is constructed into an integrated structure, thereby being beneficial to reducing the weight of the torsion box.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which 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 principles of the utility model.

FIG. 1 is a schematic view of a stringer root according to an embodiment of the present utility model;

FIG. 2 is a force transfer path diagram in the Y-direction of the stringer root in accordance with an embodiment of the present utility model;

fig. 3 is a schematic diagram of the overlap of a side sill in the shape of a Chinese character 'ri' according to an embodiment of the present utility model;

FIG. 4 is a schematic illustration of a torque box overlapping an outside of a passenger compartment in accordance with an embodiment of the present utility model;

FIG. 5 is a schematic illustration of the overlap of a torsion box with a cowl cross member in accordance with an embodiment of the present utility model;

FIG. 6 is a schematic illustration of the overlap of a torsion box with an A-pillar according to an embodiment of the present utility model;

fig. 7 is a schematic view of a torsion box according to an embodiment of the present utility model;

fig. 8 is another structural schematic view of a torsion box according to an embodiment of the present utility model;

fig. 9 is a schematic view of still another construction of the torsion box according to the embodiment of the present utility model.

Reference numerals:

a torsion box 202; a first faying surface 202a; a second faying surface 202b; a third faying surface 202c; a fourth faying surface 202d; a first connection surface 202e; a second connection surface 202f; a third connection surface 202g; a fourth connection surface 202h; a fifth connection surface 202i; a sixth connection surface 202j; a seventh connection surface 202k; an eighth connection surface 202l; a ninth connection surface 202m; a tenth connection surface 202n; an eleventh connection surface 202o;

a front side member 203; a front wheel cover 204; a dash panel 205; a cowl cross member 206; a front lower cross member 207; a central passage 208; a front wall reinforcing plate 209; a front wall reinforcement stay plate 210;

a battery pack 301;

a column a 401; a front end face 401h of the A column; inner side 401i of column a.

A stringer connecting section 11; a column a connection 12; a cowl cross member connecting portion 13; a first reinforcing rib 14; a torque box body 15; the stringer connecting cavity 16; second reinforcing ribs 17; a third reinforcing rib 18; a first mounting surface 19; a second mounting surface 20.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description and claims of the present utility model, the terms "first," "second," and the like, if any, may include one or more of those features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present utility model, it should be understood that, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are referred to, the positional relationship indicated based on the drawings is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined and limited. 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 according to the specific circumstances.

A torsion box 202 according to an embodiment of the present utility model is described in detail below with reference to fig. 1 to 9 of the accompanying drawings.

As shown in fig. 7 to 9, the torsion box 202 according to the embodiment of the present utility model includes the side member connection portion 11, the a-pillar connection portion 12, and the cowl cross member connection portion 13.

Specifically, the side member connecting portion 11 is adapted to be connected to the front side member 203. The a-pillar connection 12 is adapted to connect with the a-pillar 401. The cowl cross member connecting portion 13 is adapted to be connected with the cowl cross member 206. Wherein, the torsion box 202 is an integrally formed structure.

In other words, referring to fig. 7 to 9, the torsion box 202 according to the embodiment of the present utility model is mainly composed of the side member connection portion 11, the a-pillar connection portion 12, and the cowl cross member connection portion 13. Wherein the side member connecting portion 11 can be connected to the front side member 203. The a-pillar connection 12 can be connected to the a-pillar 401. The cowl cross member connecting portion 13 can be connected to the cowl cross member 206. Through setting up longeron connecting portion 11, A post connecting portion 12 and preceding enclose crossbeam connecting portion 13, can realize the effective connection to front longeron, A post and preceding enclose crossbeam, improve the stability that the longeron is connected with the passenger cabin. The torsion box 202 is of an integrally formed structure, so that the overall structural strength of the torsion box 202 is convenient to be enhanced, and the torsion box 202 is constructed into an integrated structure, which is beneficial to reducing the weight of the torsion box 202.

Thus, in the torsion box 202 of the present utility model, by providing the side member connection portion 11, the a pillar connection portion 12, and the cowl cross member connection portion 13, effective connection of the front side member 203, the a pillar 401, and the cowl cross member 206 can be achieved, and stability of connection of the side member to the passenger compartment can be improved. The torsion box 202 is of an integrally formed structure, so that the overall structural strength of the torsion box 202 is convenient to be enhanced, and the torsion box 202 is constructed into an integrated structure, which is beneficial to reducing the weight of the torsion box 202.

According to one embodiment of the present utility model, as shown in fig. 7 and 8, the area of the cross section of the torsion box 202 gradually increases in the direction from the front to the rear of the vehicle. That is, the cross-sectional area of the torsion box 202 in the direction from the front to the rear of the vehicle gradually increases, and the torsion box 202 is configured in a flare-out structure, so that the torsion box 202 is connected with the front longitudinal beam 203, the a pillar 401, the front cross member 206, and the like in a combined manner, the firmness of the lap joint of the longitudinal beam and the passenger compartment is improved, and a plurality of force transmission paths can be formed with the front longitudinal beam 203, the a pillar 401, the front cross member 206, and the like through the torsion box, thereby facilitating the dispersion of collision energy.

According to an embodiment of the present utility model, as shown in fig. 7 and 8, the cross section of the side member connecting portion 11 may be configured in a "ri" shape, so that a cavity is formed in the side member connecting portion 11, thereby facilitating the force transmission between the front side member 203 and the side member connecting portion 11, and reducing the torsion and the overall weight of the side member 202.

In some embodiments of the present utility model, referring to fig. 7 and 8, the side member connection portion 11 is located on the front side of the a pillar connection portion 12 and the cowl cross member connection portion 13 in the vehicle front-rear direction. The a-pillar connecting portion 12 and the cowl cross connecting portion 13 are located on both sides of the side member connecting portion 11 in the vehicle left-right direction. The longitudinal beam connecting part 11, the A column connecting part 12 and the front wall cross beam connecting part 13 in the torsion box 202 are highly integrated, so that the problems of strength reduction, uneven assembly structural strength and the like of parts joint parts caused by different parts are reduced, and the stability of the joint of the longitudinal beam and the passenger cabin is improved.

According to an embodiment of the present utility model, as shown in fig. 7 and 8, the torsion box 202 further includes a plurality of first reinforcing ribs 14 and a torsion box body 15, the first reinforcing ribs 14 are connected with the torsion box body 15, and the first reinforcing ribs 14 and the torsion box body 15 cooperate to form a plurality of semi-closed cavities, so that the force transmission effect of the torsion box 202 is improved, and the weight of the torsion box 202 is reduced. And meanwhile, the structural strength of the torsion box 202 can be effectively improved through the plurality of first reinforcing ribs 14.

Alternatively, referring to fig. 7 and 8, a plurality of first reinforcing ribs 14 respectively connect the girder connection portion 11 and the a-pillar connection portion 12, enhance the structural strength of the girder connection portion 11 and the a-pillar connection portion 12, and ensure stable force transmission of the girder connection portion 11 and the a-pillar connection portion 12.

According to one embodiment of the present utility model, as shown in fig. 7 and 8, the stringer connecting portion 11 is provided with the stringer connecting cavity 16, and the projection of the first stiffener 14 in the front-rear direction of the vehicle and the projection of the stringer connecting portion cavity 16 in the front-rear direction of the vehicle are at least partially overlapped, so that the force transmission effect of the stringer connecting portion 11 is effectively improved.

According to an embodiment of the present utility model, referring to fig. 7 and 8, the torsion box 202 further includes a plurality of second reinforcing ribs 17, the second reinforcing ribs 17 and the first reinforcing ribs 14 are respectively located at opposite sides of the longitudinal beam connecting portion 11 in the left-right direction of the vehicle, the second reinforcing ribs 17 are connected with the torsion box body 15, and the second reinforcing ribs 17 and the torsion box body 15 form a plurality of semi-closed cavities, so that the force transmission effect of the torsion box 202 is further improved, and the weight of the torsion box 202 is reduced. And at the same time, the structural strength of the torsion box 202 can be further improved by the plurality of second reinforcing ribs 17.

In some embodiments of the present utility model, the stringer connecting portion 11 is provided with the stringer connecting cavity 16, and the projection of the second stiffener 17 in the front-rear direction of the vehicle at least partially overlaps with the projection of the stringer connecting cavity 16 in the front-rear direction of the vehicle, so as to effectively enhance the structural strength of the torsion box 202.

According to one embodiment of the utility model, in the up-down direction of the vehicle, the longitudinal beam connecting part 11 is provided with at least one longitudinal beam connecting cavity 16, the longitudinal beam connecting cavity 16 is provided with a top wall and a bottom wall, the first reinforcing rib 14 and the second reinforcing rib 16 are both positioned between the plane of the top wall and the plane of the bottom wall, so that the structural strength of the longitudinal beam connecting part 11 is effectively improved, and the force transmission effect is improved.

According to one embodiment of the present utility model, referring to fig. 9, the a-pillar connecting section 12 is provided with a first mounting surface 19 extending in the vehicle left-right direction, and a second mounting surface 20 extending in the vehicle front-rear direction, both the first mounting surface 19 and the second mounting surface 20 being adapted to be connected with the a-pillar 401. The a-pillar connection 12 is stably connected to the a-pillar 401 by the first and second mounting surfaces 20, facilitating the transfer of force from the torsion box 202 to the a-pillar 401 through the a-pillar connection 12.

According to an embodiment of the present utility model, as shown in fig. 9, the torsion box 202 further includes a third reinforcing rib 18, at least a portion of the third reinforcing rib 18 is connected to the second mounting surface 20, and the third reinforcing rib 18 is disposed on a side of the torsion box body 15 away from the stringer connecting portion 11, so as to effectively improve the structural strength of the a-pillar mounting portion, and further improve the force transmission effect.

According to a second aspect of the present utility model, there is provided a vehicle including the torsion box 202, the front side member 203, the a pillar 401 and the front wall member 206 in the above-described embodiments, as shown in fig. 1, 2, 7 and 8, the front side member 203 is connected to the side member connecting portion 11, and the front side member 203 is connected to the front wall member 202 through the torsion box 202, the force transmission effect of the front side member 203 and the torsion box 202 is improved, the rear end of the torsion box 202 is received by the front wall member 205, and the connection of the casting periphery (torsion box 202) to other members forms a plurality of force transmission paths, effectively increasing the dispersion path of collision energy, improving the collision performance. The a-pillar connecting portion 12 is connected to the a-pillar 401, and the cowl cross member connecting portion 13 is connected to the cowl cross member 206. The torsion box 202 is used to connect the a-pillar 401, the front rail 206, the front lower rail 207, and the central passage 208, respectively, by a portion of the overlap surface to form a first force transfer path. The torsion box 202 is used to connect the front wheel cover 204, the front wall reinforcement plate 209, the front wall reinforcement plate 210, and the battery pack 301, respectively, through a portion of the overlapping surface to form a second force transmission path.

According to an embodiment of the present utility model, as shown in fig. 1 and 2, a torsion box 202 is provided on a side of a front side member 203 remote from the front side member, the torsion box 202 being integrally provided with the front side member 203, the torsion box 202 having a plurality of joint surfaces, in a width direction of a vehicle body, through a part of the joint surfaces, the torsion box 202 being used to connect an a pillar 401, a front cross member 206, a front lower cross member 207, and a central passage 208, respectively, to form a first force transmission path; the torsion box 202 is used to connect the front wheel cover 204, the front wall reinforcing plate 209, the front wall reinforcing plate 210, and the battery pack 301, respectively, through a part of the joint surface in the height direction of the vehicle body, to form a second force transmission path.

In other words, referring to fig. 1 and 2, the vehicle according to the embodiment of the utility model is mainly composed of the front side member 203 and the torsion box 202. The torsion box 202 is disposed on a side of the front side member 203 away from the front bumper beam, and the torsion box 202 is integrally disposed with the front side member 203. The torque box 202 is arranged at the root of the front longitudinal beam 203, the front longitudinal beam 203 and the torque box 202 are constructed into an integrated structural member, the torque box 202 is used as a front longitudinal beam root casting, the problems that the strength of the part lap joint part caused by splicing different parts is reduced, the structural strength of the assembly is uneven and the like can be solved, the lap joint stability of the front longitudinal beam 203 and a passenger cabin is improved, and the NVH performance is improved.

The torsion box 202 has a plurality of joint surfaces, and in the width direction of the vehicle body, the torsion box 202 is used to connect the a pillar 401, the cowl cross member 206, the cowl cross member 207, and the center tunnel 208, respectively, through a portion of the joint surfaces to form a first force transmission path. In the height direction of the vehicle body, the torsion box 202 is used to connect the front wheel cover 204, the front wall reinforcement plate 209, the front wall reinforcement plate 210, and the battery pack 301, respectively, through a part of the joint surface to form a second force transmission path (the first force transmission path and the second force transmission path are see the broken line arrow in fig. 1)

In the present utility model, the left-right direction of the vehicle is the Y direction, the front-rear direction of the vehicle is the X direction, and the up-down direction of the vehicle is the Z direction.

The utility model ensures that the longitudinal beam forms two main force transmission paths in the Y direction and the Z direction by forming the root casting of the front longitudinal beam according to the arrangement of the torsion box 202 on the front longitudinal beam. The collision force is transferred to the cast aluminum structure (torsion box 202) by the front longitudinal beam 203, and then dispersed to the left to the a pillar 401, and dispersed to the right to the front cross member 206, the front lower cross member 207 and the central channel 208, forming a Y-direction force transfer path. The collision force is transmitted from the front side members 203 to the cast aluminum structure (torsion box 202) and is dispersed upward to the front wheel cover 204, the front reinforcement plate 209, and the front reinforcement stay plate 210, and downward to the battery pack 301, forming a Z-direction force transmission path. The rear end of the torsion box 202 is received by the dash panel 205, and the periphery of the casting is connected with other components to form a plurality of force transmission paths, so that the dispersion path of collision energy is effectively increased, and the collision performance is improved.

Therefore, according to the vehicle of the embodiment of the utility model, the torsion box 202 is arranged at the root of the front longitudinal beam 203, the front longitudinal beam 203 and the torsion box 202 are constructed into an integrated structural member, so that the torsion box 202 is used as a casting of the root of the front longitudinal beam, the problems of reduced strength of part joint parts, uneven structural strength of the assembly and the like caused by splicing different parts can be reduced, the joint stability of the front longitudinal beam 203 and a passenger cabin is improved, and the NVH performance is improved. Meanwhile, by integrally providing the torsion box 202, it is possible to connect to the a-pillar 401, the cowl cross member 206, the cowl lower cross member 207, and the central passage 208, and form a first force transmission path. And can be connected to the front wheel cover 204, the front wall reinforcing plate 209, the front wall reinforcing support plate 210 and the battery pack 301, and form a second force transmission path, so that a dispersing path of collision energy is increased, and the collision performance is improved.

According to one embodiment of the present utility model, the torsion box 202 is curved along opposite sides of the front side member 203, respectively, in the width direction of the vehicle body to form an envelope for overlapping the vehicle body structure.

That is, as shown in fig. 2, the root portion of the front side member 203 is received by a highly integrated cast aluminum structure (torsion box 202). The side member root castings (torsion boxes 202) are each curved along opposite sides of the front side member 203 in the width direction of the vehicle body, with the torsion boxes 202 forming envelope openings for overlapping the vehicle body structure. The torsion box 202 is substantially in the form of a flare, and connects the a pillar 401 to the left, the front cross member 206 and the front lower cross member 207 to the right, the cast aluminum wheel cover (front wheel cover 204) to the upward, the battery pack 301 to the downward, the front side member 203 to the forward, and the dash panel 205 to the backward. The high-integration front longitudinal beam root casting reduces the problems of part overlap joint strength reduction, uneven assembly structural strength and the like caused by splicing different parts, and improves the overlap joint stability of the front longitudinal beam root and the passenger cabin.

According to one embodiment of the utility model, the torsion box 202 is provided with stiffening ribs at overlapping locations corresponding to the envelope. In other words, the horn mouth flare type front longitudinal beam root design is provided with reinforcing ribs at the left, right and lower opening areas while extending from front to back, the rear end of the casting is received by the dash panel 205, and the periphery of the casting is connected with other components to form a plurality of force transmission paths.

In some embodiments of the present utility model, the cross section of the front side member 203 is in a shape like a Chinese character 'ri', and the side member connecting portion 11 of the torsion box 202 corresponds to the cross section of the front side member, and the torsion box 202 is connected with the front side member 203 by embedding the side member connecting portion.

That is, the cross section of the front side member 203 is in a Chinese-character 'ri' shape, the cross section of the junction of the torsion box 202 and the front side member 203 is in a Chinese-character 'ri' shape (see fig. 7 and 8), the torsion box 202 is fitted and connected to the front side member 203 by the side member connecting portion 11, and the torsion box 202 and the front side member 203 are fastened and connected by bolts in the vehicle body width direction and the height direction. The torsion box 202 is glued to the dash panel 205 and the front wall reinforcement plate 209, respectively, the torsion box 202 is bolted to the front wall cross member 206, the torsion box 202 is bolted to the front wall lower cross member 207, and the front wall cross member 206 and the front wall lower cross member 207 are connected to the dash panel 205 to form a reinforcing connection structure.

As shown in fig. 3 and 7, the torsion box 202 and the front side member 203 are in a zigzag-shaped insertion lap joint. The front side frame 203 adopts a Chinese-character 'ri' shaped sectional material structure, a Chinese-character 'ri' shaped bowl-shaped structure is arranged at the front part of a rear casting (a torsion box 202) of the front side frame 203, and the front side frame 203 is received in a form of being embedded into the inner side of the front side frame 203. The plurality of joint surfaces of the torque box 202 are a first joint surface 202a, a second joint surface 202b, a third joint surface 202c, and a fourth joint surface 202d, respectively, and Y-direction fastening is performed by bolts at the first joint surface 202a and the second joint surface 202b, and Z-direction fastening is performed by bolts at the third joint surface 202c and the fourth joint surface 202 d. The end of the Chinese character 'ri' shaped lap joint surface of the casting at the root of the longitudinal beam is provided with a slightly larger bearing surface, and the reinforcing rib is extended from front to back, thereby ensuring the smooth stress of the structure.

According to one embodiment of the present utility model, the torsion box 202, the front rail 206 and the front lower rail 207 are each provided with a plurality of connection surfaces, and the connection surfaces of the torsion box 202, the front rail 206 and the front lower rail 207 are overlapped with each other in a staggered manner to form a lap joint.

Referring to fig. 4 and 5, the plurality of connection surfaces are a first connection surface 202e, a second connection surface 202f, a third connection surface 202g, a fourth connection surface 202h, a fifth connection surface 202i, a sixth connection surface 202j, a seventh connection surface 202k, an eighth connection surface 202l, a ninth connection surface 202m, a tenth connection surface 202n, and an eleventh connection surface 202o, respectively, wherein an upper end surface (first connection surface 202 e) of the side member root casting (torsion box 202) is glued to the dash panel 205 and the dash reinforcement panel 209. One right end face (second joint face 202 f) and the other right end face (sixth joint face 202 j) of the rail root casting are bolted to the cowl cross member 206. The right lower end face (third connecting face 202 g) of the rail root casting is connected with the front lower cross member 207 by bolts. The dash cross-member 206 and the dash lower cross-member 207 receive the dash panel 205 rearward. The overlap forms the primary connection between the stringer root and the passenger compartment (carbon compartment).

The casting (torsion box 202) at the root of the longitudinal beam is provided with a plurality of connecting surfaces with the front cabin cross beam and the front cabin lower cross beam, and each connecting surface is overlapped in a staggered way. The two right end faces (second connecting face 202f and eighth connecting face 202 l) of the rail root casting form oblique X-bolt connections with the cowl cross 206. The two right end faces (the sixth joint face 202j and the primer joint face) form an oblique Z-direction connection with the cowl cross member 206. The four faces are surrounded by diamond lap rings (see dashed boxes in fig. 5), and the faces are offset from each other, so that the connection strength of the casting at the root of the longitudinal beam and the front surrounding cross beam 206 is enhanced. The two lower end surfaces (a ninth connecting surface 202m and an eleventh connecting surface 202 o) of the longitudinal beam root casting form Z-direction bolt connection with the front lower cross beam 207, the lower end surface (a tenth connecting surface 202 n) forms oblique Z-direction bolt connection with the front lower cross beam 207, and the lower end surface (a third connecting surface 202 g) forms oblique X-direction bolt connection with the front lower cross beam 207. The four faces are surrounded by a stable lap ring (see the dashed line frames in fig. 4 and 5), and the joints of the casting at the root of the longitudinal beam and the front cross beam 206 are enhanced due to the dislocation of the faces.

In some embodiments of the present utility model, the vehicle further includes an a-pillar 401, and the first mounting surface 19 and the second mounting surface 20 of the a-pillar connecting portion 12 form an L-shaped extension surface on which the torsion box 202 is connected to the a-pillar 401. The first mounting surface 19 and the second mounting surface 20 of the torsion box 202 cooperate toward the a-pillar 401 to form an L-shaped extension surface on which the torsion box 202 is bolted to the a-pillar 401. Referring to fig. 6, the left side of the stringer root casting (torque box 202) forms an L-shaped extension lap with the a-pillar 401. The left side surface (fourth connecting surface 202 h) of the girder root casting and the front end surface 401h of the A column are connected in the X direction through bolts, and the left side surface (fifth connecting surface 202I) of the girder root casting and the inner side surface 401I of the A column are connected in the Y direction through bolts. The L-shaped connecting surface is gradually enlarged from top to bottom, so that the stability of connection is improved.

As shown in fig. 1 and 2, the girder root structure of the present utility model adopts a torsion box 202 to firmly overlap with a front girder 203, a front shock absorber, a dash panel 205, a cross beam of the dash panel 205 and an a pillar 401, so as to form a highly integrated girder root structure. In the lap joint area of the root part of the front longitudinal beam and the cabin and other positions, various connection modes and characteristics of screw connection, riveting and gluing are adopted, so that the stability of the connection of the front longitudinal beam 203 and the passenger cabin is enhanced, and the collision force transmission performance and NVH performance are improved.

The utility model reduces the number of parts and improves the connection performance of the structure by adopting the highly integrated cast aluminum longitudinal beam root structure. Referring to fig. 1 and 2, the rear of the front longitudinal beam 203 is provided with a highly integrated cast aluminum longitudinal beam root (torsion box 202), a left connecting a column 401, a right connecting a front cross beam 206, an upward connecting cast aluminum wheel cover, a downward connecting battery pack 301, a front longitudinal beam 203 aluminum profile, and a rear connecting a front wall plate 205. The high-integration longitudinal beam root improves the connection strength and can greatly reduce the development and splicing welding production operation time of the data of parts, dies and fixtures.

As shown in fig. 2, the root of the longitudinal beam (torsion box 202) adopts a flared form, and gradually increases from front to back, and a plurality of force transmission paths disperse collision force. In the primary force transfer path of the stringer root torque box 202Y, the impact force is transferred to the a-pillar 401 to the left along the root and to the cowl cross 206 and the central tunnel 208 to the right. In the main force transmission path in the Z direction of the side member root torsion box 202, the collision force is transmitted upward along the root to the shock tower and the upper part of the front wall, and downward to the lower front wall cross member 207 and the battery pack 301. The torsion box 202 at the root of the longitudinal beam is designed into an internal reinforcing rib supporting structure, so that the strength of the front longitudinal beam 203 is effectively improved, and the collision force is guided to be dispersed.

As shown in fig. 3, the stringer root castings employ various features to integrally connect the peripheral structures. The front end of the casting at the root of the longitudinal beam is connected with a bowl buckle in a Chinese character 'ri' shape of the front longitudinal beam 203, is glued with the upper front wall (carbon cabin), forms dislocation screw connection with each surface of the front wall cross beam 206 (see fig. 4 and 5), and forms an L-shaped screw connection surface with the A column 401 (see fig. 6). And the casting at the root of the longitudinal beam is firmly connected with the peripheral components, so that the collision force transmission and NVH performance of the automobile body are improved.

In summary, according to the vehicle of the embodiment of the utility model, the problems of reduced strength at the part joint, uneven assembly structural strength and the like caused by splicing different parts can be reduced, the joint stability of the front longitudinal beam 203 and the passenger compartment is improved, and the NVH performance and the collision performance are improved.

Of course, other structures of the vehicle and its working principle are understood and can be implemented by those skilled in the art, and detailed description thereof is omitted herein.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (15)

1. A torsion box, comprising:

a side member connecting portion adapted to be connected with a front side member;

the A column connecting part is suitable for being connected with the A column;

the front wall beam connecting part is suitable for being connected with the front wall beam;

wherein, torsion box is integrated into one piece structure.

2. The torsion box according to claim 1, wherein the cross-sectional area of the torsion box gradually increases from the front to the rear of the vehicle.

3. The torsion box according to claim 1, wherein the cross section of the stringer connecting portion is of a "delta" configuration.

4. The torsion box according to claim 1, wherein the side member connecting portion is located on a front side of the a-pillar connecting portion and the cowl cross connecting portion in a vehicle front-rear direction.

5. The torsion box according to claim 1, wherein the a-pillar connecting portion and the cowl cross connecting portion are located on both sides of the side member connecting portion in a vehicle left-right direction.

6. The torsion box according to claim 1, further comprising a plurality of first ribs connected to the torsion box body and forming a plurality of semi-enclosed cavities.

7. The torsion box according to claim 6, wherein a plurality of the first reinforcing ribs connect the side member connecting portions and the a-pillar connecting portions, respectively.

8. The torsion box according to claim 7, wherein the side member connection portion is provided with a side member connection cavity, and a projection of the first reinforcing rib in the vehicle front-rear direction and a projection of the side member connection cavity in the vehicle front-rear direction overlap at least partially.

9. The torsion box according to claim 6, further comprising a plurality of second reinforcing ribs, the second reinforcing ribs and the first reinforcing ribs being located on opposite sides of the side member connecting portion, respectively, in a vehicle left-right direction, the second reinforcing ribs being connected with the torsion box body and forming a plurality of semi-closed cavities.

10. The torsion box according to claim 9, wherein the side member connection portion is provided with a side member connection cavity, and a projection of the second reinforcing rib in the vehicle front-rear direction and a projection of the side member connection cavity in the vehicle front-rear direction overlap at least partially.

11. The torsion box according to claim 9, wherein in the vehicle up-down direction, the side member connection portion is provided with at least one side member connection cavity having a top wall and a bottom wall, and the first reinforcing rib and the second reinforcing rib are both located between the plane of the top wall and the plane of the bottom wall.

12. The torsion box according to claim 1, wherein the a-pillar connecting portion is provided with a first mounting surface extending in a vehicle left-right direction and a second mounting surface extending in a vehicle front-rear direction, both of the first mounting surface and the second mounting surface being adapted to be connected with an a-pillar.

13. The torsion box according to claim 12, further comprising a third reinforcing rib, at least a portion of which is connected to the second mounting surface, and the third reinforcing rib is provided on a side of the torsion box body remote from the side member connecting portion.

14. A vehicle, characterized by comprising:

the torsion box according to any one of claims 1 to 13;

the front longitudinal beam is connected with the longitudinal beam connecting part and is connected with the front coaming through the torsion box;

the A column is connected with the connecting part of the A column;

the front wall cross beam, the front wall cross beam connecting portion is connected with the front wall cross beam.

15. The vehicle of claim 14, wherein the first and second mounting surfaces of the a-pillar connection form an L-shaped extension surface on which the torsion box is connected with the a-pillar.