CN219029557U - Torsion box assembly structure and vehicle - Google Patents

Abstract

The application discloses a torsion box assembly structure and vehicle, the torsion box assembly structure includes torsion box, first reinforcement and second reinforcement; one end of the torsion box along the first preset direction is used for being connected with a threshold beam of the vehicle; the first reinforcing piece is positioned at one side of the torsion box along a second preset direction and is connected with the torsion box, the first reinforcing piece and the torsion box form an included angle space, and the second preset direction is perpendicular to the first preset direction; the second reinforcement is located the contained angle space, and the second reinforcement is used for being connected with the cabin longeron of vehicle, and the second reinforcement is connected with torsion box and first reinforcement for first reinforcement, second reinforcement and torsion box form a power transmission cavity that extends along first default direction. The torque box has good force transmission effect, and can effectively transmit the energy of the cabin longitudinal beam to the threshold beam.

Description

Torsion box assembly structure and vehicle

Technical Field

The application relates to the technical field of vehicle parts, in particular to a torsion box assembly structure and a vehicle.

Background

In a vehicle, force is generally transferred between a cabin girder at a cabin and a threshold girder at a threshold, however, the torque box in the related art has poor force transfer effect, and cannot effectively transfer energy of the cabin girder to the threshold girder.

Disclosure of Invention

The application provides a torsion box assembly structure and vehicle, the power transmission of torsion box is effectual, can effectively transmit the energy of cabin longeron to the threshold roof beam.

In a first aspect, the present application provides a torsion box assembly structure for use in a vehicle, the torsion box assembly structure comprising: one end of the torsion box along a first preset direction is used for being connected with a threshold beam of the vehicle; the first reinforcing piece is positioned at one side of the torsion box along a second preset direction and is connected with the torsion box, the first reinforcing piece and the torsion box form an included angle space, and the second preset direction is perpendicular to the first preset direction; the second reinforcement is located the contained angle space, the second reinforcement be used for with the cabin longeron of vehicle is connected, just the second reinforcement with torsion box and first reinforcement is connected, makes first reinforcement the second reinforcement and the torsion box forms one and follows the power cavity that the first direction of predetermineeing extends.

In some embodiments of the present application, the torsion box includes: a torsion box body; the first flanging is positioned at one end of the torsion box body along the second preset direction and is connected with the torsion box body, and the first reinforcing piece is positioned at one side of the first flanging away from the torsion box body and is connected with the first flanging. The first flange can facilitate connection of the first reinforcing member with the torsion box.

In some embodiments of the present application, the shape of the orthographic projection of the first reinforcement on the preset plane is the same as the shape of the orthographic projection of the first flange on the preset plane, and the preset plane is parallel to the first preset direction and the second preset direction. The connection of the first reinforcement with the first turn-up edge is made more compact.

In some embodiments of the present application, the torsion box further comprises: the second flanging is positioned at one end of the torsion box body along the first preset direction and is connected with the torsion box body, and the second flanging is used for being connected with a threshold beam of the vehicle. The second flanging can facilitate the connection of the threshold beam and the torsion box.

In some embodiments of the present application, the second stiffener includes: a first portion connected to the first reinforcement; the second part is positioned between the first part and the torsion box body and is connected with the first part and the torsion box body, so that the first reinforcing piece, the first part, the second part and the torsion box form the force transmission cavity. The second portion is used for being connected with the torsion box body, and the first portion can be connected with the second portion and the first reinforcement for first reinforcement, first portion, second portion and torsion box form stable biography power cavity.

In some embodiments of the present application, an end of the torsion box for connecting with a rocker beam of the vehicle is a connecting end, and the second reinforcement further includes: the third flanging is positioned at one end of the first part far away from the connecting end and connected with the first part, and the third flanging is used for being connected with a cabin longitudinal beam of the vehicle; and the fourth flanging is positioned at one end, far away from the connecting end, of the second part and is connected with the second part, and the fourth flanging is used for being connected with a cabin longitudinal beam of the vehicle. The third flange is used for connecting the first part with the cabin longitudinal beam and the fourth flange is used for connecting the second part with the cabin longitudinal beam, so that both the first part and the second part can transmit energy of the cabin longitudinal beam.

In some embodiments of the present application, the second stiffener further comprises: a fifth flange, which is positioned at one end of the first part close to the first reinforcement and is connected with the first part and the first reinforcement; and the sixth flanging is positioned at one end of the second part, which is close to the torsion box body, and is connected with the second part and the torsion box body. The fifth flanging is convenient for connecting the first part with the first reinforcing piece, and the sixth flanging is convenient for connecting the second part with the torsion box body.

In some embodiments of the present application, the torsion box assembly structure further comprises: the third reinforcing piece is positioned in the force transmission cavity and comprises a first reinforcing part, a second reinforcing part and a connecting part, wherein the first reinforcing part is attached to and connected with the first flanging, the second reinforcing part is attached to and connected with the torsion box body, and the connecting part is connected with the first reinforcing part and the second reinforcing part; the second reinforcing piece further comprises a seventh flanging, the seventh flanging is located at one side, far away from the torsion box body, of the second reinforcing portion, and the seventh flanging is connected with the second portion and the second reinforcing portion. So that the connection of the second reinforcing piece, the third reinforcing piece and the torsion box is more stable.

In some embodiments of the present application, the torsion box assembly structure further comprises: the third reinforcement is located the power cavity, the third reinforcement includes first reinforcing part, second reinforcing part and connecting portion, first reinforcing part with first turn-ups laminating and be connected, the second reinforcing part with torsion box body laminating and be connected, connecting portion connect first reinforcing part with the second reinforcing part. The third reinforcement can improve the joint strength of first turn-ups and torsion box body, and the structural strength of the junction of first turn-ups and torsion box body can also be improved to the third reinforcement simultaneously, prevents that the junction of first turn-ups and torsion box body from breaking.

In a second aspect, the present application further provides a vehicle, including a vehicle body and the torsion box assembly structure according to any one of the above embodiments, the vehicle body having a threshold beam and a cabin longitudinal beam, the threshold beam being located at one end of the torsion box in the first preset direction and connected to the torsion box; the cabin longitudinal beam is positioned at the other end of the torsion box along the first preset direction and is connected with the second reinforcing piece.

The beneficial effects of this application are: when installing torsion box assembly structure in the automobile body of vehicle, the one end of torsion box is connected with the threshold roof beam of vehicle, and the second reinforcement is connected with the cabin longeron of vehicle, make the energy of cabin longeron pass through the second reinforcement and torsion box transfer for the threshold roof beam in proper order, pass power cavity simultaneously can make the energy of cabin longeron more smooth-going transfer for the threshold roof beam, make the power effect of torsion box assembly structure good, thereby make the torsion box assembly structure can effectively transmit the energy of cabin longeron to the threshold roof beam, and when the vehicle took place the forward collision, pass power cavity also can effectively transfer the energy when collision, can promote the automobile body torsional rigidity of vehicle, cabin vertical rigidity, cabin lateral rigidity etc. performance, thereby can provide the security performance of vehicle.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of a torsion box assembly according to an embodiment of the present utility model at a first view angle;

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

FIG. 3 is a schematic view of a torsion box according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a second reinforcing member according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of a third stiffener and torsion box according to one embodiment of the present disclosure;

fig. 6 is a schematic view of a torsion box assembly structure and a cabin longitudinal beam and a threshold beam according to an embodiment of the present disclosure.

Reference numerals:

10. a torsion box; 11. a torsion box body; 12. a first flanging; 13. a second flanging; 20. a first reinforcement; 30. a second reinforcement; 31. a first portion; 32. a second portion; 33. a third flanging; 34. fourth flanging; 35. fifth flanging; 36. sixth flanging; 37. seventh flanging; 41. an included angle space; 42. a force transfer cavity; 50. a third reinforcement; 51. a first reinforcing portion; 52. a second reinforcing portion; 53. a connection part; 60. a threshold beam; 70. cabin stringers.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The application provides a torsion box assembly structure and vehicle to the power effect of torque box is relatively poor among the solution correlation technique, can't effectively transmit the problem of threshold roof beam to the energy of cabin longeron.

In a first aspect, the present application provides a torsion box assembly structure for use in a vehicle, as shown in fig. 1 and 2, comprising a torsion box 10, a first reinforcement member 20, and a second reinforcement member 30.

Wherein one end of the torsion box 10 in the first preset direction XX is used for connecting with a rocker beam 60 (fig. 6) of the vehicle; the first reinforcing member 20 is located at one side of the torsion box 10 along a second preset direction YY and is connected with the torsion box 10, the first reinforcing member 20 and the torsion box 10 form an included angle space 41, and the second preset direction YY is perpendicular to the first preset direction XX; the second reinforcement 30 is located in the angle space 41, the second reinforcement 30 is adapted to be connected to a cabin rail 70 (fig. 6) of the vehicle, and the second reinforcement 30 is connected to the torsion box 10 and the first reinforcement 20, such that the first reinforcement 20, the second reinforcement 30 and the torsion box 10 form a force transmission cavity 42 extending in a first predetermined direction XX.

It will be appreciated that the first reinforcement 20 and the torsion box 10 form an "L" shaped or "L" shaped structure, when the torsion box assembly structure is installed in the body of a vehicle, the first preset direction XX is a direction perpendicular to the extending direction of the door sill beam 60 and the cabin longitudinal beam 70, the second preset direction YY is a direction parallel to the extending direction of the door sill beam 60 and the cabin longitudinal beam 70, at this time, one end of the torsion box 10 is connected to the door sill beam 60 of the vehicle, and the second reinforcement 30 is connected to the cabin longitudinal beam 70 of the vehicle, so that energy of the cabin longitudinal beam 70 can be transferred to the door sill beam 60 sequentially through the second reinforcement 30 and the torsion box 10, and at the same time, the force transfer cavity 42 can enable energy of the cabin longitudinal beam 70 to be transferred to the door sill beam 60 more smoothly, so that the force transfer effect of the torsion box assembly structure is good, so that the torsion box assembly structure can effectively transfer energy of the cabin longitudinal beam 10 to the door sill beam 60, and when the vehicle is in a forward collision, the cavity 42 can also effectively transfer energy vertically, and can provide rigidity, torsional rigidity, cabin rigidity, and the like to the vehicle can provide side-to-side rigidity, and the like.

Referring to fig. 1 and 3, in some embodiments of the present application, a torque box 10 includes a torque box body 11 and a first flange 12; the first flange 12 is located at one end of the torsion box body 11 along the second preset direction YY and is connected with the torsion box body 11, and the first reinforcing member 20 is located at one side of the first flange 12 away from the torsion box body 11 and is connected with the first flange 12.

It should be noted that, the torque box body 11 is a main structure of the torque box 10, the first flange 12 is disposed at an edge position of the torque box body 11 and is perpendicular to the torque box body 11, the first flange 12 may be formed by bending an edge portion of the torque box 10, the first flange 12 may facilitate connection between the first reinforcing member 20 and the torque box 10, the first reinforcing member 20 may be connected with the first flange 12 by welding, bolting, etc., and when the torque box assembly structure is installed in a vehicle body of the vehicle, the first reinforcing member 20 may be connected with structural members located at a periphery of the torque box 10 to improve connection strength between the torque box 10 and the vehicle body.

Specifically, the shape of the orthographic projection of the first reinforcing member 20 on the predetermined plane may be the same as the orthographic projection of the first flange 12 on the predetermined plane, and the predetermined plane is parallel to the first predetermined direction XX and the second predetermined direction YY. It should be noted that the first reinforcement member 20 is a follow-up structure, and the shape of the first reinforcement member 20 is designed according to the shape of the first flange 12, so that the connection between the first reinforcement member 20 and the first flange 12 is more compact.

Further, the first flange 12 and the first reinforcing member 20 both extend along the first predetermined direction XX, so that the first reinforcing member 20, the second reinforcing member 30 and the torsion box 10 form a force transmission cavity 42 extending along the first predetermined direction XX; further, the first flange 12 is located at a side of the torsion box body 11 near the second reinforcement member 30.

In an embodiment of the present application, the torsion box 10 further includes a second flange 13, where the second flange 13 is located at one end of the torsion box body 11 along the first preset direction XX and is connected to the torsion box body 11, and the second flange 13 is used to connect to a rocker beam 60 of a vehicle.

It should be noted that, the second flange 13 is disposed at an edge position of the torsion box body 11 and is perpendicular to the torsion box body 11, the second flange 13 may be formed by bending an edge portion of the torsion box 10, the second flange 13 may facilitate connection between the threshold beam 60 and the torsion box 10, and the threshold beam 60 may be connected to the second flange 13 by welding, bolting, or the like. Further, the second flange 13 extends in the second preset direction YY, so that the second flange 13 extends along with the extending direction of the threshold beam 60, so that the second flange 13 may have more connection points with the threshold beam 60 in the second preset direction YY. Further, the second flange 13 is located at a side of the torsion box body 11 away from the second reinforcement 30.

As shown in fig. 1 and 4, in some embodiments of the present application, the second reinforcement 30 includes a first portion 31 and a second portion 32; the first portion 31 is connected to the first reinforcing member 20; the second portion 32 is located between the first portion 31 and the torsion box body 11, and the second portion 32 is connected to the first portion 31 and the torsion box body 11 such that the first stiffener 20, the first portion 31, the second portion 32 and the torsion box 10 form a force transfer cavity 42. It will be appreciated that the second portion 32 is adapted to be connected to the torque box body 11 with the second portion 32 spaced from the first stiffener 20, and the first portion 31 may connect the second portion 32 to the first stiffener 20 with the first portion 31 spaced from the torque box body 11 such that the first stiffener 20, the first portion 31, the second portion 32 and the torque box 10 form a stable force transfer cavity 42.

The first portion 31 and the second portion 32 may be perpendicular to each other to form an "L" structure, and the first portion 31 and the second portion 32 may be integrally formed, or the first portion 31 and the second portion 32 may be formed separately and then spliced by welding, riveting, bolting, or the like.

In an embodiment of the present application, the end of the torsion box 10 for connecting with the rocker beam 60 of the vehicle is a connecting end, and the second reinforcement member 30 further includes a third flange 33 and a fourth flange 34; the third flange 33 is located at an end of the first portion 31 remote from the connecting end and is connected to the first portion 31, and the third flange 33 is used for being connected to a cabin longitudinal beam 70 of the vehicle; the fourth flange 34 is located at an end of the second portion 32 remote from the connection end and is connected to the second portion 32, the fourth flange 34 being intended for connection to a cabin rail 70 of a vehicle.

It will be appreciated that the end of the torque box 10 where the second flange 13 is located is the connection end of the torque box 10, the third flange 33 is used to connect the first portion 31 to the nacelle longitudinal beam 70, and the fourth flange 34 is used to connect the second portion 32 to the nacelle longitudinal beam 70, so that both the first portion 31 and the second portion 32 can transmit energy from the nacelle longitudinal beam 70. Wherein the third flange 33 is disposed at an edge position of the first portion 31 and is perpendicular to the first portion 31, the third flange 33 may be formed by bending an edge portion of the second reinforcement 30, and the third flange 33 may be connected to the cabin longitudinal beam 70 by welding, bolting, or the like; the fourth flange 34 is disposed at an edge position of the second portion 32 and perpendicular to the second portion 32, the fourth flange 34 may be formed by bending an edge portion of the second reinforcement 30, and the fourth flange 34 may be connected to the cabin longitudinal beam 70 by welding, bolting, or the like.

Further, the third flange 33 is located at a side of the first portion 31 away from the torque box body 11, and the fourth flange 34 is located at a side of the second portion 32 away from the first stiffener 20, so that the third flange 33 and the fourth flange 34 can avoid the opening of the force transmission cavity 42, and the third flange 33 and the fourth flange 34 are conveniently connected with the cabin longitudinal beam 70 by welding, bolting, or the like.

With continued reference to fig. 1 and 4, in one embodiment of the present application, the second reinforcement member 30 further includes a fifth flange 35 and a sixth flange 36; the fifth flange 35 is located at one end of the first portion 31 near the first reinforcing member 20 and is connected to the first portion 31 and the first reinforcing member 20; the sixth flange 36 is located at an end of the second portion 32 near the torsion box body 11, and is connected to the second portion 32 and the torsion box body 11.

It will be appreciated that the fifth flange 35 facilitates the connection of the first portion 31 to the first reinforcing member 20, the fifth flange 35 is disposed at an edge of the first portion 31 and perpendicular to the first portion 31, the fifth flange 35 may be formed by bending an edge portion of the second reinforcing member 30, and the fifth flange 35 may be connected to the first reinforcing member 20 by welding, bolting, or the like; the sixth flange 36 is convenient for connecting the second portion 32 with the torsion box body 11, the sixth flange 36 is disposed at an edge position of the second portion 32 and perpendicular to the second portion 32, the sixth flange 36 may be formed by bending an edge portion of the second reinforcement 30, and the sixth flange 36 may be connected with the torsion box body 11 by welding, bolting, or the like.

Further, the fifth flange 35 and the sixth flange 36 each extend along the first predetermined direction XX, so that the first portion 31 and the first reinforcing member 20 can have more connection points in the first predetermined direction XX, and the second portion 32 and the torsion box body 11 can have more connection points in the first predetermined direction XX.

As shown in fig. 1 and 5, in some embodiments of the present application, the torsion box assembly structure further includes a third reinforcing member 50, where the third reinforcing member 50 is located in the force transmission cavity 42, and the third reinforcing member 50 includes a first reinforcing portion 51, a second reinforcing portion 52, and a connecting portion 53, where the first reinforcing portion 51 is attached to and connected with the first flange 12, the second reinforcing portion 52 is attached to and connected with the torsion box body 11, and the connecting portion 53 connects the first reinforcing portion 51 with the second reinforcing portion 52.

It can be appreciated that the third reinforcing member 50 can improve the connection strength between the first flange 12 and the torsion box body 11, and meanwhile, the third reinforcing member 50 can also improve the structural strength at the connection between the first flange 12 and the torsion box body 11, so as to prevent the connection between the first flange 12 and the torsion box body 11 from breaking. The first reinforcing portion 51, the second reinforcing portion 52, and the connecting portion 53 may be integrally formed, so as to improve the overall structural strength of the third reinforcing member 50.

In an embodiment of the present application, the second reinforcement member 30 further includes a seventh flange 37, the seventh flange 37 is located on a side of the second reinforcing portion 52 away from the torsion box body 11, and the seventh flange 37 is connected to the second portion 32 and the second reinforcing portion 52. It will be appreciated that the seventh flange 37 may connect the second portion 32 with the second reinforcing portion 52 and the torsion box body 11, and that the torsion box body 11, the second reinforcing portion 52 and the seventh flange 37 are stacked to form a three-layer connection structure, so that the connection of the third reinforcing member 50, the second reinforcing member 30 and the torsion box 10 is more stable. The seventh flange 37 is disposed at an edge position of the second portion 32 and perpendicular to the second portion 32, the seventh flange 37 may be formed by bending an edge portion of the second reinforcement 30, and the seventh flange 37 may be connected to the second reinforcement 52 by welding, bolting, or the like.

Further, the sixth flange 36 is located on a side of the second portion 32 away from the first reinforcing member 20, and the seventh flange 37 is located on a side of the second portion 32 near the first reinforcing member 20, so as to facilitate connection of the sixth flange 36 to the torsion box body 11, and connection of the seventh flange 37 to the second reinforcing portion 52. Further, a portion of the sixth flange 36 may be connected to the second reinforcing portion 52, so that the connection of the third reinforcing member 50, the second reinforcing member 30, and the torsion box 10 is more stable.

Based on the torsion box assembly structure, the present application further provides a vehicle, as shown in fig. 6, where the vehicle includes a vehicle body and the torsion box assembly structure according to any one of the above embodiments, the vehicle body has a threshold beam 60 and a cabin longitudinal beam 70, and the threshold beam 60 is located at one end of the torsion box 10 along the first preset direction XX and is connected to the torsion box 10; the cabin longitudinal beam 70 is located at the other end of the torsion box 10 in the first preset direction XX and is connected to the second reinforcement 30.

The vehicle may be a car, SUV, off-road vehicle, recreational vehicle, pickup truck, etc., and the type and size of the vehicle are not particularly limited in this application.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. A torsion box assembly structure, characterized in that is applied to the vehicle, the torsion box assembly structure includes:

one end of the torsion box along a first preset direction is used for being connected with a threshold beam of the vehicle;

the first reinforcing piece is positioned at one side of the torsion box along a second preset direction and is connected with the torsion box, the first reinforcing piece and the torsion box form an included angle space, and the second preset direction is perpendicular to the first preset direction;

the second reinforcement is located the contained angle space, the second reinforcement be used for with the cabin longeron of vehicle is connected, just the second reinforcement with torsion box and first reinforcement is connected, makes first reinforcement the second reinforcement and the torsion box forms one and follows the power cavity that the first direction of predetermineeing extends.

2. The torsion box assembly structure according to claim 1, wherein the torsion box includes:

a torsion box body;

the first flanging is positioned at one end of the torsion box body along the second preset direction and is connected with the torsion box body, and the first reinforcing piece is positioned at one side of the first flanging away from the torsion box body and is connected with the first flanging.

3. The torque box assembly structure of claim 2, wherein the shape of the orthographic projection of the first reinforcement member on the predetermined plane is the same as the shape of the orthographic projection of the first flange on the predetermined plane, the predetermined plane being parallel to the first predetermined direction and the second predetermined direction.

4. The torsion box assembly structure according to claim 2, wherein the torsion box further comprises:

the second flanging is positioned at one end of the torsion box body along the first preset direction and is connected with the torsion box body, and the second flanging is used for being connected with a threshold beam of the vehicle.

5. The torsion box assembly structure according to claim 2, wherein the second reinforcement member includes:

a first portion connected to the first reinforcement;

the second part is positioned between the first part and the torsion box body and is connected with the first part and the torsion box body, so that the first reinforcing piece, the first part, the second part and the torsion box form the force transmission cavity.

6. The torsion box assembly structure according to claim 5, wherein an end of the torsion box for connection with a rocker beam of the vehicle is a connection end, the second reinforcement further comprising:

the third flanging is positioned at one end of the first part far away from the connecting end and connected with the first part, and the third flanging is used for being connected with a cabin longitudinal beam of the vehicle;

and the fourth flanging is positioned at one end, far away from the connecting end, of the second part and is connected with the second part, and the fourth flanging is used for being connected with a cabin longitudinal beam of the vehicle.

7. The torsion box assembly structure according to claim 5, wherein the second reinforcement further comprises:

a fifth flange, which is positioned at one end of the first part close to the first reinforcement and is connected with the first part and the first reinforcement;

and the sixth flanging is positioned at one end of the second part, which is close to the torsion box body, and is connected with the second part and the torsion box body.

8. The torsion box assembly structure according to claim 7, further comprising:

the third reinforcing piece is positioned in the force transmission cavity and comprises a first reinforcing part, a second reinforcing part and a connecting part, wherein the first reinforcing part is attached to and connected with the first flanging, the second reinforcing part is attached to and connected with the torsion box body, and the connecting part is connected with the first reinforcing part and the second reinforcing part;

the second reinforcing piece further comprises a seventh flanging, the seventh flanging is located at one side, far away from the torsion box body, of the second reinforcing portion, and the seventh flanging is connected with the second portion and the second reinforcing portion.

9. The torsion box assembly structure according to claim 2, further comprising:

the third reinforcement is located the power cavity, the third reinforcement includes first reinforcing part, second reinforcing part and connecting portion, first reinforcing part with first turn-ups laminating and be connected, the second reinforcing part with torsion box body laminating and be connected, connecting portion connect first reinforcing part with the second reinforcing part.

10. A vehicle comprising a vehicle body and the torsion box assembly structure according to any one of claims 1 to 9, the vehicle body having a rocker beam and a cabin side member, the rocker beam being located at one end of the torsion box in the first preset direction and connected to the torsion box; the cabin longitudinal beam is positioned at the other end of the torsion box along the first preset direction and is connected with the second reinforcing piece.

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