阅读说明：本技术 用于汽车的碰撞吸能装置及汽车 (Collision energy absorption device for automobile and automobile ) 是由 刘波 于 2018-05-30 设计创作，主要内容包括：本申请涉及汽车技术领域,尤其涉及一种用于汽车的碰撞吸能装置及汽车。碰撞吸能装置包括：一级吸能盒,设置成连接于所述汽车的防撞梁；二级吸能盒,与所述一级吸能盒或者所述防撞梁连接；所述一级吸能盒与所述二级吸能盒设置于所述防撞梁与所述汽车的纵梁之间,且所述二级吸能盒的刚度与所述一级吸能盒的刚度不相等,以使所述二级吸能盒与所述一级吸能盒在所述防撞梁受到外力作用后发生分步溃缩。本申请传递至纵梁的作用力显著减小,对纵梁的冲击力较小,减小甚至消除经前轮、悬架系统和前挡板传递至乘员舱的作用力,从而保护车内人员的安全,提高汽车的安全性。(the application relates to the technical field of automobiles, in particular to a collision energy absorption device for an automobile and the automobile. The collision energy-absorbing device includes: a primary energy absorption box arranged to be connected to an anti-collision beam of the automobile; the secondary energy absorption box is connected with the primary energy absorption box or the anti-collision beam; the first-stage energy absorption box and the second-stage energy absorption box are arranged between the anti-collision beam and the longitudinal beam of the automobile, and the rigidity of the second-stage energy absorption box is not equal to that of the first-stage energy absorption box, so that the second-stage energy absorption box and the first-stage energy absorption box are subjected to step-by-step crumpling after the anti-collision beam is subjected to external force. The effort that this application transmitted to the longeron is showing and is reducing, and is less to the impact force of longeron, reduces or even eliminates the effort that transmits to passenger cabin through front wheel, suspension system and preceding baffle to personnel's in the protection safety improves the security of car.)

1. a crash energy absorber device for an automobile, comprising:

A primary energy absorption box arranged to be connected to an anti-collision beam of the automobile;

The secondary energy absorption box is connected with the primary energy absorption box or the anti-collision beam;

The first-stage energy absorption box and the second-stage energy absorption box are arranged between the anti-collision beam and the longitudinal beam of the automobile, and the rigidity of the second-stage energy absorption box is not equal to that of the first-stage energy absorption box.

2. the device of claim 1, further comprising a support member disposed between the primary energy-absorbing box and the longitudinal beam, wherein one end of the support member is connected to the longitudinal beam, and the other end of the support member is connected to a side of the primary energy-absorbing box or the secondary energy-absorbing box, which is far away from the impact beam, having a lower stiffness.

3. The device of claim 2, wherein the secondary energy absorption box is disposed within the primary energy absorption box and is closer to the impact beam than the support; the rigidity of the secondary energy absorption box is greater than that of the primary energy absorption box;

Preferably, one end of the secondary energy absorption box is connected with the anti-collision beam, and the other end of the secondary energy absorption box is suspended;

Preferably, the side wall of the secondary energy absorption box is connected with the side wall of the primary energy absorption box.

4. the crash energy absorber according to claim 2 wherein said secondary energy absorption box is connected between said primary energy absorption box and said support member, said secondary energy absorption box having a stiffness less than a stiffness of said primary energy absorption box;

preferably, the stiffness of the support is between the stiffness of the secondary energy absorption box and the stiffness of the primary energy absorption box.

5. The crash energy absorber according to claim 2 wherein said support member is of a V-shaped configuration including a first connecting portion and a second connecting portion connected to each other;

the first connecting part is connected with one of the secondary energy absorption box and the primary energy absorption box, which has higher rigidity, and the second connecting part is arranged to be connected with the longitudinal beam; the opening of the V-shaped structure faces the longitudinal beam; the secondary energy absorption box and the primary energy absorption box are arranged at one end of the support piece far away from the opening;

preferably, the first connecting part and the second connecting part each comprise a body and a protrusion connected with each other, and the two protrusions protrude towards each other;

The first connecting portion and the second connecting portion are connected by two of the protrusions.

6. The device according to claim 5, characterized in that both bodies are provided with a flanging structure.

7. the device of claim 5, further comprising a tension spring coupled between the first coupling portion and the second coupling portion.

8. The crash energy absorber according to claim 2 further comprising a thrust member, wherein said support member is connected to said side member by said thrust member, said thrust member being stiffer than said support member;

Preferably, the thrust member includes a first connecting plate, a second connecting plate bent and connected to an edge of the first connecting plate, and a support plate connecting the first connecting plate and the second connecting plate; the first connecting plate is connected with the support; the second connecting plate is connected with the longitudinal beam.

9. an automobile, comprising:

an anti-collision beam;

a stringer; and

An energy absorbing device according to any one of claims 1 to 8,

the collision energy absorption device is arranged between the collision beam and the longitudinal beam, and the primary energy absorption box is connected to the collision beam; and the anti-collision beam is connected with the longitudinal beam through at least one of the primary energy absorption box and the secondary energy absorption box.

10. The vehicle of claim 9, wherein the primary energy absorption box is provided with a recess, and the impact beam is inserted into the recess.

Technical Field

The application relates to the technical field of automobiles, in particular to a collision energy absorption device for an automobile and the automobile.

Background

Before the automobile leaves the factory, various collision tests need to be carried out, the existing automobile is provided with an energy absorption box between an anti-collision beam and a longitudinal beam, the requirements can be met when the automobile is subjected to the collision tests, however, along with the improvement of the performance requirements of the automobile by people, 25% of small overlapping collision tests need to be carried out on the automobile, namely, the collision tests are carried out when the overlapping amount of the anti-collision beam and a rigid barrier in the collision direction is smaller, the existing automobile structure is directly adopted, in 25% of small overlapping collisions, because the buffering capacity of the energy absorption box is limited, the collision force is directly transmitted to the longitudinal beam, the damage to the longitudinal beam is larger, the rear transmission is carried out through a front wheel, a suspension system and a front baffle, the automobile enters a passenger cabin, the injury of personnel in the automobile can be caused.

disclosure of Invention

the application provides a collision energy-absorbing device and car for car, can solve above-mentioned problem.

A first aspect of the present application provides a collision energy absorbing device for an automobile, including:

A primary energy absorption box arranged to be connected to an anti-collision beam of the automobile;

the secondary energy absorption box is connected with the primary energy absorption box or the anti-collision beam;

the first-stage energy absorption box and the second-stage energy absorption box are arranged between the anti-collision beam and the longitudinal beam of the automobile, and the rigidity of the second-stage energy absorption box is not equal to that of the first-stage energy absorption box.

Optionally, the energy-absorbing structure further comprises a supporting member arranged between the primary energy-absorbing box and the longitudinal beam, one end of the supporting member is connected to the longitudinal beam, and the other end of the supporting member is connected to one side, far away from the anti-collision beam, of the primary energy-absorbing box and the secondary energy-absorbing box, wherein the side has lower rigidity.

Optionally, the secondary energy absorption box is arranged in the primary energy absorption box, and is closer to the anti-collision beam than the support piece; the rigidity of the secondary energy absorption box is greater than that of the primary energy absorption box.

Optionally, one end of the secondary energy absorption box is connected with the anti-collision beam, and the other end of the secondary energy absorption box is suspended.

Optionally, the side wall of the secondary energy absorption box is connected with the side wall of the primary energy absorption box.

Optionally, the secondary energy absorption box is connected between the primary energy absorption box and the support member, and the stiffness of the secondary energy absorption box is smaller than that of the primary energy absorption box.

optionally, the stiffness of the support is intermediate between the stiffness of the secondary energy-absorbing box and the stiffness of the primary energy-absorbing box.

optionally, the supporting member is in a V-shaped structure and comprises a first connecting part and a second connecting part which are connected with each other;

The first connecting part is connected with one of the secondary energy absorption box and the primary energy absorption box, which has higher rigidity, and the second connecting part is arranged to be connected with the longitudinal beam; the opening of the V-shaped structure faces the longitudinal beam; the secondary energy absorption box and the primary energy absorption box are arranged at one end, far away from the opening, of the support piece.

Optionally, the first connecting portion and the second connecting portion each include a body and a protrusion connected to each other, and the two protrusions protrude toward each other;

The first connecting portion and the second connecting portion are connected by two of the protrusions.

Optionally, both the bodies are provided with a flanging structure.

Optionally, the connector further comprises a telescopic spring, and the telescopic spring is connected between the first connecting portion and the second connecting portion.

Optionally, the support member is connected to the longitudinal beam through a thrust member, and the rigidity of the thrust member is greater than that of the support member.

optionally, the thrust member includes a first connecting plate, a second connecting plate bent and connected to an edge of the first connecting plate, and a support plate connecting the first connecting plate and the second connecting plate; the first connecting plate is connected with the support; the second connecting plate is connected with the longitudinal beam.

a second aspect of the present application provides an automobile comprising:

An anti-collision beam;

A stringer; and

A collision energy-absorbing device, the collision energy-absorbing device being any one of the collision energy-absorbing devices described above,

The collision energy absorption device is arranged between the collision beam and the longitudinal beam, and the primary energy absorption box is connected to the collision beam; and the anti-collision beam is connected with the longitudinal beam through at least one of the primary energy absorption box and the secondary energy absorption box.

Optionally, the primary energy absorption box is provided with a groove, and the anti-collision beam is inserted into the groove.

The technical scheme provided by the application can achieve the following beneficial effects:

The collision energy-absorbing device is provided with a first-stage energy-absorbing box and a second-stage energy-absorbing box, wherein the first-stage energy-absorbing box and the second-stage energy-absorbing box are arranged between an anti-collision beam and a longitudinal beam when being installed in an automobile, when a 25% collision test is carried out, a rigid barrier firstly contacts the anti-collision beam and applies collision impact force to the rigid barrier, and because the rigidity of the second-stage energy-absorbing box is not equal to that of the first-stage energy-absorbing box, one with lower rigidity is firstly compressed to realize first-stage energy absorption, when the collapse is nearly completed, the other with higher rigidity starts to collapse until the completion along with the further extrusion of the rigid barrier to realize second-stage energy absorption, and then the acting force is transmitted to the longitudinal beam, and because the acting force reaches the longitudinal beam and is subjected to multiple times of energy absorption, the acting force transmitted to the longitudinal beam is remarkably reduced, the acting, The acting force transmitted to the passenger compartment by the suspension system and the front baffle plate protects the safety of people in the automobile and improves the safety of the automobile.

it is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

drawings

FIG. 1 is a schematic structural view of one embodiment of a crash energy absorber device provided herein;

FIG. 2 is an exploded view of one embodiment of a crash energy absorber device provided herein.

reference numerals:

10-an anti-collision beam;

11-a groove;

20-longitudinal beams;

30-a first-level crash box;

40-a secondary energy absorption box;

50-a support;

51-a first connection;

511-body;

512-bump;

513-flanging structure;

52-a second connection;

60-a telescopic spring;

70-a thrust piece;

71-a first connection plate;

72-a second connecting plate;

73-a support plate;

80-rigid barriers.

the accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

The embodiment of the application provides an automobile, including crashproof roof beam 10, longeron 20 and collision energy-absorbing device, crashproof roof beam 10 can be the front impact beam, and longeron 20 can be the front longitudinal, and the collision energy-absorbing device is used for the automobile, installs between crashproof roof beam 10 and longeron 20 to cushion external impact force to longeron 20.

Specifically, as shown in fig. 1 to 2, the crash energy absorption device includes a primary energy absorption box 30 and a secondary energy absorption box 40, both of which have elastic deformation capability, the primary energy absorption box 30 is disposed to be connected to the impact beam 10, and the secondary energy absorption box 40 is connected to the primary energy absorption box 30 or the impact beam 10. Specifically, the rigidity of the secondary energy absorption box 40 is not equal to the rigidity of the primary energy absorption box 30, the primary energy absorption box 30 and the secondary energy absorption box 40 are arranged between the anti-collision beam 10 and the longitudinal beam 20, one end of the primary energy absorption box 30 is connected with the anti-collision beam 10, one side, far away from the anti-collision beam 10, of one of the primary energy absorption box 30 and the secondary energy absorption box 40 with lower rigidity is connected with the longitudinal beam 20, and if the rigidity of the primary energy absorption box 30 is lower, the longitudinal beam 20 is connected with one side, far away from the anti-collision beam 10, of the primary energy absorption; when the stiffness of the secondary energy-absorbing box 40 is smaller, the longitudinal beam 20 is connected with one side of the secondary energy-absorbing box 40 far away from the impact beam 10, so that the secondary energy-absorbing box 40 and the primary energy-absorbing box 30 are subjected to step-by-step crumpling after the impact beam 10 is subjected to external force.

in the collision energy absorption device, the primary energy absorption box 30 and the secondary energy absorption box 40 are arranged between the collision beam 10 and the longitudinal beam 20, the primary energy absorption box 30 is connected with the collision beam 10, the secondary energy absorption box 40 can be connected with the collision beam 10 and also can be connected with the primary energy absorption box 30, however, the rigidity of the primary energy absorption box 30 is different from that of the secondary energy absorption box 40, when a 25% small overlap (namely the overlapping area of the rigid barrier 80 and the collision beam 10 is smaller) collision test is carried out, the rigid barrier 80 is arranged in front of the collision beam 10 (namely the front end along the length direction X of an automobile), the rigid barrier 80 firstly contacts the collision beam 10 and applies collision impact force to the rigid barrier 80, and because the rigidity of the unequal of the secondary energy absorption box 40 and the primary energy absorption box 30, the one with the smaller rigidity is firstly compressed to realize the primary energy absorption box; when the collapse of the automobile is nearly finished, along with the further extrusion of the rigid barrier 80, one with higher rigidity starts to collapse until the end, secondary energy absorption is realized, and then the acting force is transmitted to the longitudinal beam 20, because the impact force of collision has already been subjected to multiple energy absorption before reaching the longitudinal beam 20, the acting force transmitted to the longitudinal beam 20 is obviously reduced, the impact force on the longitudinal beam 20 is smaller, and thus the acting force transmitted to a passenger compartment through a front wheel, a suspension system and a front baffle is reduced or even eliminated, so that the safety of personnel in the automobile is protected, and the safety of the automobile is improved; and the transmission path of the collision impact force is guided through the sequential energy absorption of the secondary energy absorption box 40 and the primary energy absorption box 30, so that the energy absorption time of the collision energy absorption device can be prolonged, the impact force on the longitudinal beam 20 in a collision test can be better buffered, the personnel in a passenger compartment can be prevented from being damaged, and the safety of the automobile is improved.

The anti-collision beam 10 extends along the width direction of the automobile, the longitudinal beam 20 extends along the length direction of the automobile, the length of the anti-collision beam 10 can be determined according to the overlapping area of the anti-collision beam and the rigid barrier 80, and the collision energy absorption device can be arranged on the outer side of the longitudinal beam 20, as shown in fig. 1-2. In order to ensure the contact area between the primary energy-absorbing box 30 and the anti-collision beam 10, improve the transmission of impact force between the primary energy-absorbing box 30 and the anti-collision beam 10, and increase the connection reliability between the primary energy-absorbing box and the anti-collision beam 10, the anti-collision beam 10 is provided with a groove 11, and the primary energy-absorbing box 30 is inserted into the groove 11, as shown in fig. 1.

further, the collision energy absorption device further comprises a supporting piece 50 arranged between the first-stage energy absorption box 30 and the longitudinal beam 20, one end of the supporting piece 50 is connected to the longitudinal beam 20, and the other end of the supporting piece 50 is connected to one side, far away from the anti-collision beam 10, of the first-stage energy absorption box 30 and the second-stage energy absorption box 40, which has lower rigidity, for example, when the rigidity of the first-stage energy absorption box 30 is lower, the supporting piece 50 is connected with one side, far away from the anti-collision beam 10, of; when the stiffness of the secondary energy-absorbing box 40 is smaller, the support piece 50 is connected with one side of the secondary energy-absorbing box 40 far away from the anti-collision beam 10, after the arrangement, when the primary energy-absorbing box 30 and the secondary energy-absorbing box 40 are collapsed, the rigid barrier 80 continues to extrude the anti-collision beam 10 under the further action of collision load, and at the moment, the support piece 50 deforms and continues to absorb energy, so that the energy absorption effect of the energy-absorbing device is improved, and the safety of the automobile is better improved.

The elastic direction of the first-stage energy-absorbing box 30 and the second-stage energy-absorbing box 40 is consistent with the length direction X of the automobile, the first-stage energy-absorbing box 30 and the second-stage energy-absorbing box 40 can be hollow columnar structures, the cross section of each hollow columnar structure can be a polygonal structure, such as a square structure, a hexagon structure, an octagon structure and the like, so that the rigidity of the first-stage energy-absorbing box 30 and the second-stage energy-absorbing box 40 is improved, wherein the cross section is a cross section perpendicular to the length direction X, and optionally.

The primary energy absorption box 30 and the secondary energy absorption box 40 may be arranged in the following manner:

In the first mode, the secondary energy-absorbing box 40 is disposed in the primary energy-absorbing box 30, and one end of the primary energy-absorbing box 30 away from the impact beam 10 is connected to the longitudinal beam 20, that is, the primary energy-absorbing box 30 and the secondary energy-absorbing box 40 are of a sleeved structure, and compared with the support 50, the secondary energy-absorbing box 40 is closer to the impact beam 10, that is, the secondary energy-absorbing box 40 is disposed at one side of the impact beam 10 in the region between the impact beam 10 and the longitudinal beam 20, at this time, the stiffness of the secondary energy-absorbing box 40 is greater than that of the primary energy-absorbing box 30, so that when the impact beam 10 is impacted, the primary energy-absorbing box 30 located outside collapses first, when the primary energy-absorbing box 30 collapses, the secondary energy-absorbing box 40 collapses, and when the secondary energy-absorbing box 40 collapses, the support 50 begins to collapse until the end, the acting force is transmitted to the longitudinal. By adopting the sleeving manner, the primary energy absorption box 30 can protect the secondary energy absorption box 40, and the reliability of the collision energy absorption device is improved.

in the embodiment, one end of the secondary energy absorption box 40 is connected with the anti-collision beam 10, and the other end of the secondary energy absorption box is suspended, when the secondary energy absorption box 40 is in a hollow columnar structure, one axial end of the secondary energy absorption box 40 is connected with the anti-collision beam 10, the other axial end of the secondary energy absorption box extends towards the supporting piece 50, but the secondary energy absorption box is not connected with other pieces, and after the secondary energy absorption box 40 is arranged in the hollow columnar structure, the buffering effect of the secondary energy absorption box 40 can be fully exerted.

the side wall of the secondary energy absorption box 40 can be connected with the side wall of the primary energy absorption box 30, for example, when the primary energy absorption box 30 and the secondary energy absorption box 40 are both in hollow columnar structures, the primary energy absorption box 30 and the secondary energy absorption box 40 are connected at respective cylindrical surfaces, and only part of the cylindrical surfaces of the primary energy absorption box and the secondary energy absorption box are connected along the axial direction of the secondary energy absorption box 40, so that the connection reliability of the secondary energy absorption box 40 can be improved, and the secondary energy absorption box is prevented from vibrating to influence the.

It should be noted that this arrangement may be adopted when the support member 50 is not provided.

in the second mode, the secondary energy absorption box 40 is disposed outside the primary energy absorption box 30, specifically, as shown in fig. 1-2, the secondary energy absorption box 40 and the primary energy absorption box 30 are sequentially disposed, and when both are hollow columnar structures, the two are arranged along the axial direction of the secondary energy absorption box 40, one end of the secondary energy absorption box 40 is connected with the primary energy absorption box 30, and the other end is connected with the longitudinal beam 20, when the support member 50 is disposed, the secondary energy absorption box 40 is connected between the primary energy absorption box 30 and the support member 50, and at this time, the rigidity of the secondary energy absorption box 40 is smaller than that of the primary energy absorption box 30. In this embodiment, the secondary energy absorption box 40 is attached to the side of the primary energy absorption box 30 away from the impact beam 10; the two ends of the support 50 are respectively connected with the secondary energy-absorbing box 40 and the longitudinal beam 20, that is, the primary energy-absorbing box 30, the secondary energy-absorbing box 40 and the support 50 are sequentially connected. In this way, when a collision test with a small overlap of 25% (i.e., the overlapping area between the rigid barrier 80 and the impact beam 10 is small), the rigid barrier 80 is arranged in front of the impact beam 10 (i.e., the front end in the length direction X of the automobile), the rigid barrier 80 first contacts the impact beam 10 to apply a collision impact force to the rigid barrier 80, and since the rigidity of the secondary energy-absorbing box 40 is smaller than that of the primary energy-absorbing box 30, the secondary energy-absorbing box 40 is first compressed to realize primary energy absorption; when the secondary energy absorption box 40 finishes collapsing, the primary energy absorption box 30 begins collapsing until finishing with the further extrusion of the rigid barrier 80, so as to realize secondary energy absorption; under the further action of the collision load, the rigid barrier 80 continuously extrudes the anti-collision beam 10, at the moment, the support piece 50 deforms and continuously absorbs energy, and then the acting force is transmitted to the longitudinal beam 20, because the collision impact force passes through the multiple energy absorption actions before reaching the longitudinal beam 20, the acting force transmitted to the longitudinal beam 20 is obviously reduced, the impact force on the longitudinal beam 20 is smaller, and the acting force transmitted to a passenger compartment through a front wheel, a suspension system and a front baffle is reduced or even eliminated, so that the safety of personnel in the vehicle is protected, and the safety of the vehicle is improved; and the transmission path of the collision impact force is guided by the sequential energy absorption of the secondary energy absorption box 40, the primary energy absorption box 30 and the support piece 50, so that the energy absorption time of the collision energy absorption device can be prolonged, the impact force on the longitudinal beam 20 in a collision test can be further buffered, the personnel in a passenger compartment can be prevented from being damaged, and the safety of the automobile is improved.

in this embodiment, the secondary crash box 40 protrudes in the direction of the support 50 with respect to the primary crash box 30, and has a cross-sectional area smaller than that of the primary crash box 30 for easy attachment.

No matter which way is adopted by the first-stage energy-absorbing box 30 and the second-stage energy-absorbing box 40, optionally, the rigidity of the support 50 is between the rigidities of the second-stage energy-absorbing box 40 and the first-stage energy-absorbing box 30, and after the arrangement, when the acting force is transmitted to the support 50, because the rigidity of the support 50 is between the first-stage energy-absorbing box 30 and the second-stage energy-absorbing box 40, when one of the first-stage energy-absorbing box 30 and the second-stage energy-absorbing box 40 with higher rigidity is collapsed, the support 50 can also play a certain energy-absorbing role, so that the impact on the longitudinal beam 20 is better buffered.

Specifically, the support 50 has a V-shaped structure including a first connection portion 51 and a second connection portion 52 connected to each other; the first connecting portion 51 and the second connecting portion 52 are oppositely arranged along the length direction X, the first connecting portion 51 is connected with one of the first-stage energy-absorbing box and the second-stage energy-absorbing box, which has higher rigidity, if the second-stage energy-absorbing box 40 is arranged outside the first-stage energy-absorbing box 30, the first connecting portion 51 is connected with the second-stage energy-absorbing box 40, the second connecting portion 52 is arranged to be connected with the longitudinal beam 20, namely, the support member 50 is connected with the longitudinal beam 20 through the second connecting portion 52, and the support member 50 is easy to process due to the adoption of the split structure.

the opening of the V-shaped structure faces the longitudinal beam 20, and the secondary energy absorption box 40 and the primary energy absorption box 30 are arranged at one end, far away from the opening, of the support 50 to increase the impact resistance of the support 50, so that the impact effect on the longitudinal beam 20 is reduced.

Further, the first connection portion 51 and the second connection portion 52 each include a body 511 and a protrusion 512 connected to each other, and the two protrusions 512 protrude toward each other, that is, in the first connection portion 51, the protrusion 512 protrudes toward the second connection portion 52; in the second connecting portion 52, the protrusion 512 protrudes toward the first connecting portion 51, and at this time, the first connecting portion 51 and the second connecting portion 52 are connected by two protrusions, that is, the two protrusions 512 are disposed between the two bodies 511 and located at one end of the V-shaped structure away from the opening, so that after the two protrusions are disposed, the rigidity of the supporting member 50 can be increased, the deformation resistance of the supporting member 50 can be improved, the impact of the collision impact force on the longitudinal beam can be better buffered, and the safety of the automobile can be improved. Of course, only the first connection portion 51 or the second connection portion 52 may be provided with the projection 512.

In an embodiment, the supporting member 50 is provided with a flange structure 513, the flange structure 513 may be bent toward the outer side of the supporting member 50, when the main body 511 is provided, the flange structure 513 may be provided on the main body 511, only the flange structure 513 may be provided on the main body 511 of the first connecting portion 51 or the second connecting portion 52, or both the main bodies 511 may be provided with the flange structure 513. As shown in fig. 1, the first connecting portion 51 and the second connecting portion 52 are both provided with a body 511, and both the bodies 511 are provided with a flanging structure 513, so that the rigidity of the support 50 can be improved by adding the flanging structure 513, and the influence of the collision impact force on the longitudinal beam 20 can be better buffered.

when the first connecting portion 51 and the second connecting portion 52 are both provided with the flanging structures 513, the two flanging structures 513 may be connected to each other or may be independently provided.

In order to further improve the energy absorption function of the support 50, the collision energy absorption device further comprises a telescopic spring 60, the telescopic spring 60 is connected between the first connecting portion 51 and the second connecting portion 52, the telescopic spring 60 at least has elastic force along the length direction X, and two ends of the telescopic spring 60 can be welded with the first connecting portion 51 and the second connecting portion 52; or the extension spring 60 is connected to the support 50 through a spring support.

when the impact force of the collision is transmitted to the side member 20 through the support member 50 during the collision, since the support member 50 has a certain buffering function, the rigidity of the support member 50 is limited, so that the rigidity of the side member 20 is required to be relatively high to prevent the impact force from being transmitted to the passenger compartment, thereby increasing the complexity of the side member 20. In order to solve the problem, the collision energy absorption device further comprises a thrust member 70, the support member 50 is connected with the longitudinal beam 20 through the thrust member 70, wherein the rigidity of the thrust member 70 is greater than that of the support member 50, that is, the support member 50 is connected with the thrust member 70, and the support member 50 is connected with the longitudinal beam 20, so that after the arrangement, when collision impact force is transmitted to the thrust member 70 through the support member 50, the thrust member 70 has a better stopping effect on the collision impact force, so that the acting force transmitted to the longitudinal beam 20 is further reduced, and therefore, the rigidity requirement of the longitudinal beam 20 can be reduced, the structure of the longitudinal beam 20 is simplified, and the weight of the longitudinal beam 20 is reduced.

in one embodiment, the thrust member 70 includes a first connection plate 71, a second connection plate 72 bent to be connected to an edge of the first connection plate 71, and a support plate 73 connecting the first connection plate 71 and the second connection plate 72; the first connection plate 71 is connected with the support 50; the second connecting plate 72 is connected to the longitudinal beam 20, that is, the first connecting plate 71 and the second connecting plate 72 are in an L-shaped structure, and the supporting plate 73 may be a triangular plate, one side of which is attached to the first connecting plate 71, and the other side of which is attached to the second connecting plate 72, so as to increase the strength and rigidity of the thrust member 70. The first connecting plate 71 and the support member 50 can be attached and connected, the second connecting plate 72 and the longitudinal beam 20 are attached and connected, and the two connections can be realized through bolts and the like.

the above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.