CN221497934U - Vehicle under support beam and vehicle - Google Patents

Abstract

The utility model discloses a vehicle lower support beam and a vehicle, wherein the vehicle lower support beam comprises: the first plate body is provided with a weakening part, and the thickness of the weakening part is smaller than that of other areas of the first plate body; the second plate body, first plate body and second plate body are relative to set up in the first direction, and first plate body links to each other with second plate body on the homonymy one end in the second direction, and the portion of weakening is used for forming the bending deformation district when first plate body or second plate body receive the extrusion, and first direction is vehicle height direction, and first direction and second direction quadrature. Therefore, the weakening portion is arranged on the first plate body, the rigidity of the position of the weakening portion is small, the first plate body is easy to collapse, the vehicle lower supporting beam can play a role in collapsing and absorbing energy, injuries to pedestrians caused by collision are reduced, meanwhile, the rigidity difference is formed between the first plate body and the second plate body, the vehicle lower supporting beam can guide the collided pedestrians to move towards the expected direction, and the human body is prevented from being wound into the vehicle bottom.

Description

Vehicle under support beam and vehicle

Technical Field

The utility model relates to the field of vehicles, in particular to a vehicle lower support beam and a vehicle.

Background

To prevent the leg of a pedestrian from rolling into the vehicle bottom during an impact between the vehicle and the pedestrian, a support structure is typically provided on the vehicle at a location corresponding to the lower leg.

In the related art, the effect of collapsing and absorbing energy of the supporting structure is poor, and the bending deformation direction of the supporting structure is inconvenient to control, so that the supporting structure has poor protection effect on pedestrians.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a lower support beam for a vehicle, which can guide the deformation direction of a human body while having a crumple energy absorbing effect.

A vehicle under-support beam, comprising: the first plate body is provided with a weakening portion, and the thickness of the weakening portion is smaller than that of other areas of the first plate body; the first plate body and the second plate body are oppositely arranged in the first direction, one end of the same side of the first plate body and one end of the same side of the second plate body in the second direction are connected, and the weakening part is used for forming a bending deformation area when the first plate or the second plate body is extruded; the first direction is a vehicle height direction, wherein the first direction is orthogonal to the second direction.

According to the vehicle lower support beam, the weakening part is arranged on the first plate body, the rigidity of the position of the weakening part is small, so that the first plate body is easy to collapse, the vehicle lower support beam can play a role of collapsing and absorbing energy, injury to pedestrians caused by collision is reduced, meanwhile, the first plate body and the second plate body form rigidity difference, when collision occurs, the first plate body collapses, the second plate body can bend towards the direction of the first plate body, the bending deformation direction of the vehicle lower support beam is controlled, the vehicle lower support beam can guide the collided pedestrians to move towards the expected direction, injury to human bodies is reduced, the human bodies are prevented from being wound into the vehicle bottom, and the protection effect of the vehicle lower support beam on the pedestrians is improved.

In some embodiments of the utility model, the weakened portion extends along a third direction, and the weakened portion penetrates the first plate in the third direction; or the weakening parts are configured to be arranged at intervals in a third direction, the third direction is orthogonal to the second direction, and the third direction is different from the first direction.

In some embodiments of the utility model, the weakened portion is disposed corresponding to a stress concentration area on the vehicle under support beam.

In some embodiments of the utility model, the weakened portion is formed on a surface of the first plate facing away from the second plate; or the weakened portion is formed on a surface of the first plate body facing the second plate body to deform the vehicle under-support beam in a collision direction.

In some embodiments of the utility model, the length dimension of the weakened portion in the second direction is 2mm to 4mm.

In some embodiments of the present utility model, in the first direction, a projection distance L1 of a side edge of the first plate body connected to the second plate body and the weakened portion, and a projection length L2 of the first plate body satisfy: 0.25L2 is less than or equal to L1 is less than or equal to 0.35L2.

In some embodiments of the present utility model, a reinforcing rib is further disposed between the first plate body and the second plate body.

In some embodiments of the utility model, the stiffener comprises: the first reinforcing ribs and the second reinforcing ribs are arranged at intervals in the second direction to define avoidance portions, and the avoidance portions are opposite to the weakening portions in the first direction.

In some embodiments of the utility model, the first plate is one and the second plate is at least one.

Another object of the utility model is to propose a vehicle.

A vehicle, comprising: the vehicle lower support beam described above; the vehicle lower support beam is positioned on one side of the bumper in the first direction, and one side of the vehicle lower support beam in the second direction is connected with the auxiliary anti-collision beam.

The advantages of the vehicle are the same as those of the vehicle lower support beam, and are not described in detail herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of an assembled position of a vehicle under support beam according to an embodiment of the utility model;

FIG. 2 is a top view of a vehicle under-support beam according to an embodiment of the present utility model;

FIG. 3 is a bottom view of a vehicle lower support beam according to an embodiment of the present utility model;

Fig. 4 is a cross-sectional view of a vehicle under-support beam according to an embodiment of the present utility model.

Reference numerals:

A vehicle lower support beam 100, a first plate 110, a weakened portion 111, a second plate 120,

A bumper 200, and a sub-impact beam 300.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements 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.

In the description of the present utility model, "plurality" means two or more.

A vehicle under-support beam 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 4.

Referring to fig. 2, 3 and 4, the vehicle under support beam 100 according to the present utility model includes: the first plate body 110 and the second plate body 120, the first plate body 110 is provided with a weakening portion 111, the thickness of the weakening portion 111 in the first direction is smaller than that of other areas of the first plate body 110, the first plate body 110 and the second plate body 120 are oppositely arranged in the first direction, one end of the same side of the first plate body 110 and one end of the same side of the second plate body 120 in the second direction are connected, and the weakening portion 111 is used for forming a bending deformation area when the first plate body 110 or the second plate body 120 is extruded; the first direction is the height direction of the vehicle, and the first direction is orthogonal to the second direction.

The "first direction" refers to the Z direction of the vehicle, i.e., the up-down direction of the vehicle, the "second direction" refers to the X direction of the vehicle, i.e., the front-back direction of the vehicle, and the "third direction" refers to the Y direction of the vehicle, i.e., the left-right direction of the vehicle.

Specifically, the first plate body 110 and the second plate body 120 are oppositely disposed in the Z direction, and one ends of the first plate body 110 and the second plate body 120 far away from the cockpit in the X direction are connected, and meanwhile, two ends of the first plate body 110 and the second plate body 120 in the third direction are connected, wherein the first plate body 110 is provided with a weakening portion 111, and because the thickness of the weakening portion 111 in the first direction is smaller, the rigidity of the weakening portion 111 is smaller than that of other areas on the first plate body 110, and when a collision occurs, the weakening portion 111 can collapse, so that the vehicle lower support beam 100 can play a role in collapsing and absorbing energy, so as to reduce injury of the collision to human bodies and play a role in protecting pedestrians.

Here, the "bending deformation region" refers to a region when the weakened portion 111 is deformed by force.

Further, the thickness of the weakening portion 111 is smaller than that of the second plate 120, by providing the weakening portion 111, a rigidity difference is formed between the first plate 110 and the second plate 120, when a vehicle collides, the first plate 110 collapses, the second plate 120 can bend toward the first plate 110, thereby realizing control of the bending deformation direction of the vehicle lower support beam 100, the vehicle lower support beam 100 can support a human body when the collision occurs, and the bending deformation direction of the vehicle lower support beam 100 can guide the collided pedestrian to move toward an expected direction, prevent the human body from being wound into the vehicle bottom, and further improve the protection effect of the vehicle lower support beam 100 on the pedestrian.

In the related art, the effect of collapsing and absorbing energy of the vehicle lower support beam is poor, and the control of the bending and deforming direction of the vehicle lower support beam is inconvenient, so that the protection effect of the vehicle lower support beam on pedestrians is poor.

The application reduces the local rigidity of the first plate body 110 by arranging the weakening part 111 on the first plate body 110, so that the first plate body 110 is easy to collapse, thereby the vehicle lower support beam 100 can play a role of collapsing and absorbing energy, and the rigidity difference between the first plate body 110 and the second plate body 120 can be formed by arranging the weakening part 111, so as to control the bending deformation direction of the vehicle lower support beam 100, the vehicle lower support beam 100 can guide the collided pedestrian to move towards the expected direction, the injury to the human body is reduced, the human body is prevented from being wound into the vehicle bottom, and the protection effect of the vehicle lower support beam 100 on the pedestrian is improved.

According to the vehicle lower support beam 100, the weakening portion 111 is arranged on the first plate body 110, the rigidity of the position of the weakening portion 111 is small, so that the first plate body 110 is easy to collapse, the vehicle lower support beam 100 can play a role in collapsing and absorbing energy, injury to pedestrians caused by collision is reduced, meanwhile, rigidity difference is formed between the first plate body 110 and the second plate body 120, when collision occurs, the first plate body 110 collapses, the second plate body 120 can bend towards the direction of the first plate body 110, the bending deformation direction of the vehicle lower support beam 100 is controlled, the collided pedestrians can be guided to move towards the expected direction, injury to human bodies is reduced, the human bodies are prevented from being wound into the vehicle bottom, and the protection effect of the vehicle lower support beam 100 on the pedestrians is improved.

It should be noted that, the plate body provided with the weakening portion 111 is defined as a first plate body 110, the plate body not provided with the weakening portion 111 is configured as a second plate body 120, correspondingly, the first plate body 110 and the second plate body 120 are correspondingly arranged in the first upward direction, and in the embodiment of the upper plate body provided with the weakening portion, that is, in the embodiment as shown in fig. 2 and fig. 4, the upper plate body is the first plate body 110, and the lower plate body is the second plate body 120; in the embodiment in which the lower plate body is provided with the weakening portion, the lower plate body is a first plate body, and the upper plate body is a second plate body.

As shown in fig. 2, in some embodiments of the present utility model, the weakened portion 111 extends along a third direction, and the weakened portion 111 penetrates through the first plate 110 in the third direction; or the weakened portions 111 are configured in a plurality of spaced apart arrangement in a third direction that is orthogonal to the second direction and that is different from the first direction.

Specifically, the weakened portion 111 may be constructed in a groove structure, and the thickness of the weakened portion 111 may be smaller than that of other areas on the first plate body 110, and the weakened portion 111 may be constructed in a groove structure disposed through the first plate body 110 in the third direction, so that the processing of the weakened portion 111 is facilitated, and thus the processing production efficiency of the under-vehicle support beam 100 may be improved.

The weakened portions 111 may be configured as a plurality of groove structures extending in the third direction, and the plurality of groove structures are arranged at intervals in the third direction, so that the number and positions of the weakened portions 111 are arranged according to the stress condition or the deformation requirement of the support plate, and the flexibility of the arrangement of the weakened portions 111 is improved.

It will be understood, of course, that the weakened portion 111 may be configured in other structures (e.g., a hole structure, etc.), and the specific configuration of the weakened portion 111 may be determined in connection with actual production, which is not specifically limited herein.

In some embodiments of the present utility model, the weakened portions 111 are provided corresponding to stress concentration areas on the vehicle under support beam 100.

Specifically, the weakening portion 111 is disposed at a position on the vehicle lower support beam 100 where stress concentration is likely to occur when the vehicle collides, so that the first plate body 110 is likely to be crushed, thereby ensuring the crush energy absorbing effect of the vehicle lower support beam 100, reducing the injury of the collision to pedestrians, and improving the protection effect of the vehicle lower support beam 100 to the pedestrians.

As shown in fig. 4, in some embodiments of the present utility model, the weakened portion 111 is formed on a surface of the first plate body 110 facing away from the second plate body 120, or the weakened portion 111 is formed on a surface of the first plate body 110 facing toward the second plate body 120, so as to deform the vehicle under-support beam 100 in the collision direction.

Specifically, when the upper plate body is the first plate body 110, the weakening portion 111 is formed on a side surface of the first plate body 110 facing away from the second plate body 120, so that when the first plate body 110 is subjected to the extrusion force, the first plate body 110 is easy to bend towards a direction facing away from the second plate body 120 while deforming and absorbing energy, the first plate body 110 can drive the second plate body 120 to bend, so that the vehicle lower support beam 100 can bend along the collision direction, the deformation direction of the vehicle lower support beam 100 is controlled, and meanwhile, the vehicle lower support beam 100 can be used for supporting a human body, so that the bending deformation direction of the vehicle lower support beam 100 can guide the movement direction of the human body, the human body is prevented from being wound into the vehicle bottom, and the protection effect of the vehicle lower support beam 100 on pedestrians is improved.

Illustratively, when the lower plate body is the first plate body 110, the weakening portion 111 is formed on a surface of the opposite side of the first plate body 110 to the second plate body 120, when the first plate body 110 is subjected to the pressing force, the first plate body 110 deforms and absorbs energy while being easily bent in a direction away from the second plate body 120, the first plate body 110 can drive the second plate body 120 to bend, so that the vehicle lower support beam 100 can bend along the collision direction, to control the deformation direction of the vehicle lower support beam 100, and meanwhile, the vehicle lower support beam 100 can be used for supporting a human body, so that the bending deformation direction of the vehicle lower support beam 100 can guide the movement direction of the human body, prevent the human body from being wound into the vehicle bottom, and improve the protection effect of the vehicle lower support beam 100 on pedestrians.

In some embodiments of the utility model, the length dimension of the weakened portion 111 in the second direction is 2mm to 4mm.

Specifically, the length dimension of the weakened portion 111 in the second direction may be 2mm, 3mm, 4mm, or the like, and preferably the length dimension of the weakened portion 111 in the second direction is 3mm, so that the rigidity of the vehicle lower support beam 100 can be ensured while ensuring the deformation effect of the vehicle lower support beam 100, preventing damage to the vehicle lower support beam 100 during transportation or when jounce occurs due to insufficient rigidity of the vehicle lower support beam 100.

In some embodiments of the present utility model, a projection distance L1 between a side edge of the first plate 110 connected to the second plate 120 and the weakened portion 111, and a projection length L2 of the first plate 110 satisfy: 0.25L2 is less than or equal to L1 is less than or equal to 0.35L2.

Specifically, in the second direction, a projection distance between the weakened portion 111 and a side edge of the first plate 110 connected to the second plate 120 is defined as L1, and a projection length of the first plate 110 in the first direction is defined as L2, wherein 0.25L2 +.l1+. 0.35L2, for example: the weakened portion 111 may be disposed at 0.25L2, 0.3L2, 0.35L2, or the like, from one side edge where the first and second plate bodies 110 and 120 are connected.

Preferably, l1=1/3L 2, where it is noted. In the second direction, the position 1/3L2 away from the edge of the first plate 110 and the second plate 120 is the position of the lower support beam 100 for generating stress concentration, and the weakening portion 111 is arranged at the position where stress concentration is easy to generate, so that the lower support beam 100 is easy to crush, the collapsing energy absorbing effect of the lower support beam 100 is ensured, and the pedestrian protection effect of the lower support beam 100 is ensured.

In some embodiments of the present utility model, a reinforcing rib (not shown) is further provided between the first plate body 110 and the second plate body 120.

Specifically, the vehicle is provided with an upper support structure that is disposed opposite to the vehicle lower support beam 100 of the present application in the first direction, the stiffener is supported between the first plate body 110 and the second plate body 120, and by disposing the stiffener so that the rigidity of the vehicle lower support beam 100 is greater than that of the upper support structure to match the injured characteristics of the pedestrian when the vehicle collides with the pedestrian (i.e., the leg is easily rolled into the vehicle bottom when the pedestrian collides with the vehicle), the vehicle lower support beam 100 can be used to support the leg, the degree of deformation of the leg can be reduced, and the leg can be prevented from being rolled into the vehicle bottom.

Further, the plurality of reinforcing ribs may be provided in plurality, and the plurality of reinforcing ribs may be arranged at intervals along the third direction, and the plurality of reinforcing ribs may further ensure the rigidity of the lower support beam 100 of the vehicle, wherein the rigidity of the support structure on different vehicle types is different, the number of reinforcing ribs may be determined by combining the rigidity of the upper support structure, and the specific number of reinforcing ribs is not limited herein.

In some embodiments of the present utility model, the reinforcing bead may be constructed in a triangle plate structure, one side of the reinforcing bead is connected to the first plate body 110, the other side of the reinforcing bead is connected to the second plate body 120, and the reinforcing bead is supported between the first plate body 110 and the second plate body 120 to increase the rigidity of the vehicle under support beam 100.

In some embodiments of the utility model, the stiffener comprises: the first reinforcing rib and the second reinforcing rib are arranged at intervals in the second direction so as to define an avoidance portion, and the avoidance portion is opposite to the weakening portion 111 in the first direction.

Specifically, the first reinforcing rib and the second reinforcing rib may be configured to be columnar so that the first reinforcing rib and the second reinforcing rib may be relatively disposed in the second direction at intervals, wherein the first reinforcing rib is disposed on a side of the lower vehicle support beam 100 close to the passenger compartment, the second reinforcing rib is disposed on a side of the lower vehicle support beam 100 away from the passenger compartment, an avoidance portion is defined between the first reinforcing rib and the second reinforcing rib, the avoidance portion may avoid the weakening portion 111, the weakening portion 111 is prevented from being disabled due to interference of the reinforcing rib with the weakening portion 111, and deformation of the lower vehicle support beam 100 when receiving an impact force is ensured.

It will be understood, of course, that the bead may be configured in other shapes, and the shape of the particular bead is not limited thereto, and that the rigidity of the vehicle under support beam 100 may be adjusted by adjusting the thickness or height of the bead, etc.

In some embodiments of the present utility model, the first plate 110 is one, and the second plate 120 is at least one.

Specifically, as in the embodiment shown in fig. 4, the second plate body 120 may be provided with one, and the vehicle lower support beam 100 may be configured to have a U-shape or V-shape in cross section in the third direction; the second plate 120 may be provided with three, and the vehicle lower support beam 100 may be configured to have a W-shaped cross section in the third direction, preferably, the vehicle lower support beam 100 is configured to have a V-shaped cross section in the third direction, so that the arrangement may satisfy the manufacturing requirement of the vehicle lower support beam 100, and the arrangement of the vehicle lower support beam 100 is facilitated, and meanwhile, the structure of the vehicle lower support beam 100 is simple, thereby effectively reducing the production cost of the vehicle lower support beam 100.

It will be appreciated, of course, that the vehicle under-support beam 100 may be constructed in a beam configuration having a U-shaped, V-shaped or W-shaped cross-section, and that the particular configuration of the vehicle under-support beam 100 may be made in a manner that is structurally sound and the space on the vehicle for mounting the vehicle under-support beam 100 is determined and is not specifically limited herein.

In some embodiments of the present utility model, an energy absorbing structure (such as rubber, foam material, etc.) may be further disposed between the first plate 110 and the second plate 120, so as to further improve the effect of the vehicle under-support beam 100 on pedestrian protection and reduce the injury to human body caused by collision.

According to the vehicle of the present utility model, including the above-described vehicle under-support beam 100, bumper 200, and sub-impact beam 300, the vehicle under-support beam 100 is located on one side of the bumper 200 in the first direction, and one side of the vehicle under-support beam 100 in the second direction is connected to the sub-impact beam 300.

Specifically, as shown in fig. 1, the vehicle lower support beam 100 is disposed below the bumper 200, and a side of the vehicle lower support beam 100 that is close to the passenger compartment in the second direction is disposed opposite to a side of the sub-impact beam 300 that is away from the passenger compartment, and the vehicle lower support beam 100 may be fixedly connected to the sub-impact beam 300 by means of a snap fit or screw connection or the like.

The specific structure of the vehicle lower support beam 100 may be determined in combination with the shape of the bumper 200, and is not particularly limited herein, and the vehicle lower support beam 100 may be constructed as a resin material member, which reduces the production cost of the vehicle lower support beam 100 and simultaneously reduces the weight of the vehicle lower support beam 100, thereby facilitating the realization of a lightweight design of the vehicle.

According to the vehicle provided by the utility model, since the vehicle is provided with the vehicle lower support beam 100, the weakening part 111 is arranged on the first plate body 110, the rigidity of the position of the weakening part 111 is small, so that the first plate body 110 is easy to collapse, the vehicle lower support beam 100 can play a role in collapsing and absorbing energy, the injury to pedestrians caused by collision is reduced, meanwhile, the rigidity difference is formed between the first plate body 110 and the second plate body 120, when the collision happens, the first plate body 110 collapses, the second plate body 120 can be bent towards the direction of the first plate body 110, the bending deformation direction of the vehicle lower support beam 100 is controlled, the vehicle lower support beam 100 can guide the collided pedestrians to move towards the expected direction, the injury to human bodies is reduced, the human bodies are prevented from being wound into the vehicle bottom, and the protection effect of the vehicle lower support beam 100 on the pedestrians is improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (9)

1. A vehicle under-support beam, comprising:

The first plate body (110), the first plate body (110) is provided with a weakening portion (111), and the thickness of the weakening portion (111) is smaller than that of other areas of the first plate body (110);

The first plate body (110) and the second plate body (120) are oppositely arranged in the first direction, the first plate body (110) is connected with one end of the second plate body (120) at the same side in the second direction, and the weakening part is used for forming a bending deformation area when the first plate body or the second plate body is extruded; wherein,

The first direction is a vehicle height direction, and the first direction is orthogonal to the second direction.

2. The under-vehicle support beam according to claim 1, characterized in that the weakened portion (111) extends in a third direction, and the weakened portion (111) penetrates through the first plate body (110) in the third direction; or the weakening portion (111) is configured in a plurality of spaced-apart arrangement in a third direction, the third direction being orthogonal to the second direction, and the third direction being different from the first direction.

3. The vehicle under-support beam according to claim 1, characterized in that the weakened portion (111) is formed on a surface of the first plate body (110) facing away from the second plate body (120); or the weakened portion (111) is formed on a vehicle under-support beam on a surface of the first plate body (110) facing the second plate body (120).

4. The vehicle under support beam according to claim 1, characterized in that a length dimension of the weakened portion (111) in the second direction is 2mm to 4mm.

5. The vehicle under support beam according to claim 1, characterized in that a projection dimension L1 of a portion between a side edge of the first plate body (110) to which the second plate body (120) is connected and the weakened portion (111) in the first direction, and a projection dimension L2 of the first plate body (110) in the first direction satisfy: 0.25L2 is less than or equal to L1 is less than or equal to 0.35L2.

6. The under-vehicle support beam according to claim 1, characterized in that a reinforcing rib is further provided between the first plate body (110) and the second plate body (120).

7. The vehicle under-support beam according to claim 6, characterized in that the reinforcing bead includes: the first reinforcing ribs and the second reinforcing ribs are arranged at intervals in the second direction to define avoidance portions, and the avoidance portions are opposite to the weakening portions (111) in the first direction.

8. The vehicle under-support beam according to any one of claims 1-7, characterized in that the first plate body (110) is one, and the second plate body (120) is at least one.

9. A vehicle, characterized by comprising:

The vehicle under-support beam of any one of claims 1-8;

A bumper (200) and a secondary impact beam (300), the vehicle under-support beam being located on one side of the bumper (200) in the first direction, and the vehicle under-support beam being connected to the secondary impact beam (300) on one side of the second direction.