阅读说明：本技术 一种前纵梁吸能结构及车辆 (Front longitudinal beam energy absorption structure and vehicle ) 是由 王禄儒 牛伟 张燕 张松 熊勇 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种前纵梁吸能结构及车辆,包括前碰撞横梁、吸能盒、前纵梁总成、机舱边梁、第一钣金、第二钣金和第三钣金,由前至后的方向上前碰撞横梁、吸能盒、前纵梁总成依次连接,机舱边梁设于前纵梁总成外侧,第一钣金一端与吸能盒外侧面固定连接,另一端与机舱边梁前端面固定连接；第二钣金横向布置,一端与前纵梁总成前部上边沿固定连接,另一端机舱边梁前部上边沿固定连接；第三钣金纵向布置于第二钣金下方,一端与前纵梁总成前部外侧面固定连接,另一端机舱边梁前部内侧面固定连接,第二钣金下表面与第三钣金顶端固定连接；前纵梁总成、机舱边梁、第二钣金和第三钣金合围构成第一吸能腔。其能够提升前纵梁总成在偏置碰撞时的吸能效果。(The invention discloses a front longitudinal beam energy absorption structure and a vehicle, which comprise a front collision cross beam, an energy absorption box, a front longitudinal beam assembly, a cabin boundary beam, a first metal plate, a second metal plate and a third metal plate, wherein the front collision cross beam, the energy absorption box and the front longitudinal beam assembly are sequentially connected from front to back; the second metal plate is transversely arranged, one end of the second metal plate is fixedly connected with the upper edge of the front part of the front longitudinal beam assembly, and the upper edge of the front part of the cabin boundary beam at the other end of the second metal plate is fixedly connected; the third metal plate is longitudinally arranged below the second metal plate, one end of the third metal plate is fixedly connected with the outer side face of the front part of the front longitudinal beam assembly, the inner side face of the front part of the cabin boundary beam at the other end of the third metal plate is fixedly connected, and the lower surface of the second metal plate is fixedly connected with the top end of the third metal plate; the front longitudinal beam assembly, the cabin boundary beam, the second metal plate and the third metal plate surround to form a first energy absorption cavity. The energy absorption effect of the front longitudinal beam assembly during offset collision can be improved.)

1. The utility model provides a front longitudinal beam energy-absorbing structure, includes front impact crossbeam (1), energy-absorbing box (2), front longitudinal beam assembly (3) and cabin boundary beam (4), by preceding direction after on front impact crossbeam (1), energy-absorbing box (2), front longitudinal beam assembly (3) connect gradually, the front longitudinal beam assembly (3) outside, its characterized in that are located in cabin boundary beam (4): the front longitudinal beam assembly is characterized by further comprising a first metal plate (5), a second metal plate (6) and a third metal plate (7), wherein the first metal plate (5) is arranged on the left part and/or the right part in front of the front longitudinal beam assembly (3);

one end of the first metal plate (5) is fixedly connected with the outer side face of the energy absorption box (2), and the other end of the first metal plate is fixedly connected with the front end face of the cabin boundary beam (4);

the second metal plate (6) is transversely arranged, one end of the second metal plate is fixedly connected with the upper edge of the front part of the front longitudinal beam assembly (3), and the upper edge of the front part of the cabin boundary beam (4) at the other end of the second metal plate is fixedly connected;

the third metal plate (7) is longitudinally arranged below the second metal plate (6), one end of the third metal plate is fixedly connected with the outer side face of the front part of the front longitudinal beam assembly (3), the inner side face of the front part of the cabin boundary beam (4) at the other end of the third metal plate is fixedly connected, and the lower surface of the second metal plate (6) is fixedly connected with the top end of the third metal plate (7);

the front longitudinal beam assembly (3), the cabin boundary beam (4), the second metal plate (6) and the third metal plate (7) surround to form a first energy absorption cavity.

2. The front rail energy absorbing structure according to claim 1, wherein: the energy absorption box (2) comprises an upper plate (21) and a lower plate (22) which surround to form a second energy absorption cavity, and a first overlapping edge (51) which is connected with the upper plate (21) through bolts and a second overlapping edge (52) which is connected with the lower plate (22) through bolts are arranged at the end part, connected with the energy absorption box (2), of the first metal plate (5);

the end part of the first metal plate (5) connected with the side beam (4) of the engine room is provided with a third overlapping edge (53) which is connected with the second connecting plate (41) at the front end of the side beam (4) of the engine room through a bolt.

3. The front side member energy absorbing structure according to claim 1 or 2, wherein: front longitudinal assembly (3) include inner panel (31), planking (32) and with inner panel (31) front end fixed connection's first connecting plate (33), third panel beating (7) one end and planking (32) welded fastening, the other end and cabin boundary beam (4) medial surface welded fastening.

4. The front rail energy absorbing structure of claim 3, wherein: and a fourth overlapping edge (411) fixedly connected with the first connecting plate (33) is arranged on the edge, close to the front longitudinal beam assembly (3), of the second connecting plate (41) at the front end of the side beam (4) of the cabin.

5. The front side member energy absorbing structure according to claim 1 or 2, wherein: the left end and the right end of the second metal plate (6) are provided with first flanges (61) which are bent upwards, and the first flanges (61) are welded and fixed with the upper edge of the front longitudinal beam assembly (3) or the upper edge of the cabin boundary beam (4);

and a second flanging (72) welded and fixed with the lower edge of the front longitudinal beam assembly (3) and a third flanging (73) welded and fixed with the lower edge of the cabin boundary beam (4) are arranged at the lower end of the third metal plate (7).

6. The front rail energy absorbing structure of claim 5, wherein: a first bolt (8) penetrates through the first flanging (61) to be connected with the upper edge of the front longitudinal beam assembly (3), and a second bolt (9) penetrates through the second flanging (72) to be connected with the lower edge of the front longitudinal beam assembly (3).

7. A vehicle, comprising a body assembly, characterized in that: the vehicle body assembly comprises the front-side-member energy absorption structure of any one of claims 1 to 6.

Technical Field

The invention relates to an automobile part, in particular to a front longitudinal beam energy absorption structure and a vehicle.

Background

The offset collision is one of evaluation items of an automobile collision test, and comprises 25% offset collision and 40% offset collision, namely the overlapping area of a vehicle and a collision object is equivalent to the width of 25% and 40% of a vehicle body. The smaller the overlapping area is, the greater the impact force pressure of the automobile is, and the requirement on the collision of the automobile body is more strict.

At present, an automobile energy absorption box is arranged between a front collision cross beam and a front longitudinal beam assembly, in the 25% offset collision process, due to different collision points, when an automobile collides, a collision block does not contact and transfer force with the front longitudinal beam assembly completely, only certain bending deformation is generated, collision force is absorbed mainly through a cabin side beam, and finally the cabin longitudinal beam is seriously bent and invades into a passenger cabin to cause deformation of the passenger cabin.

Disclosure of Invention

The invention aims to provide a front longitudinal beam energy absorption structure and a vehicle, which can improve the energy absorption effect of a front longitudinal beam assembly in offset collision.

The front longitudinal beam energy absorption structure comprises a front collision cross beam, an energy absorption box, a front longitudinal beam assembly, a cabin boundary beam, a first metal plate, a second metal plate and a third metal plate, wherein the front collision cross beam, the energy absorption box and the front longitudinal beam assembly are sequentially connected from front to back; the second metal plate is transversely arranged, one end of the second metal plate is fixedly connected with the upper edge of the front part of the front longitudinal beam assembly, and the upper edge of the front part of the cabin boundary beam at the other end of the second metal plate is fixedly connected; the third metal plate is longitudinally arranged below the second metal plate, one end of the third metal plate is fixedly connected with the outer side face of the front part of the front longitudinal beam assembly, the inner side face of the front part of the cabin boundary beam at the other end of the third metal plate is fixedly connected, and the lower surface of the second metal plate is fixedly connected with the top end of the third metal plate; the front longitudinal beam assembly, the cabin boundary beam, the second metal plate and the third metal plate surround to form a first energy absorption cavity.

Furthermore, the energy absorption box comprises an upper plate and a lower plate which surround to form a second energy absorption cavity, and the end part of the first metal plate connected with the energy absorption box is provided with a first overlapping edge connected with the upper plate through a bolt and a second overlapping edge connected with the lower plate through a bolt; and the end part of the first metal plate connected with the side beam of the engine room is provided with a third overlapping edge which is connected with the second connecting plate at the front end of the side beam of the engine room through a bolt.

Furthermore, the front longitudinal beam assembly comprises an inner plate, an outer plate and a first connecting plate fixedly connected with the front end of the inner plate, one end of the third metal plate is welded and fixed with the outer plate, and the other end of the third metal plate is welded and fixed with the inner side face of the cabin boundary beam.

Furthermore, a fourth overlapping edge fixedly connected with the first connecting plate is arranged on the edge, close to the front longitudinal beam assembly, of the second connecting plate at the front end of the side beam of the engine room.

Furthermore, the left end and the right end of the second metal plate are provided with first flanges which are bent upwards and are welded and fixed with the upper edge of the front longitudinal beam assembly or the upper edge of the cabin boundary beam through the first flanges; and a second flanging fixed with the lower edge of the front longitudinal beam assembly in a welding manner and a third flanging fixed with the lower edge of the cabin boundary beam in a welding manner are arranged at the lower end of the third metal plate.

Furthermore, a first bolt penetrates through the first flanging to be connected with the upper edge of the front longitudinal beam assembly, and a second bolt penetrates through the second flanging to be connected with the lower edge of the front longitudinal beam assembly.

A vehicle comprises a vehicle body assembly, wherein the vehicle body assembly comprises the front longitudinal beam energy absorption structure.

Compared with the prior art, the invention has the following beneficial effects.

1. According to the invention, the first metal plate is arranged between the outer side surface of the energy absorption box and the front end surface of the cabin boundary beam, when one side of the whole vehicle is in offset collision, a stress point is firstly contacted with the first metal plate, the first metal plate is deformed, the energy absorption box is pulled by the first metal plate to be deformed in the stress direction of the whole vehicle in the X direction, and the first metal plate is influenced by the deformation resistance of the front collision cross beam, so that the collision force is transmitted to the other side of the whole vehicle through the front collision cross beam, the energy absorption box at the other side is stressed, and the single-side offset collision stress is successfully decomposed to the left side and the right side of the whole vehicle, and the deformation of a single-side structure is effectively reduced.

2. According to the invention, the second metal plate is transversely arranged between the front part of the front longitudinal beam assembly and the front part of the cabin boundary beam, the third metal plate is longitudinally arranged, when one side of the whole vehicle is offset and collided, the single-side integral structure is collapsed to a certain degree in the X direction along with the proceeding of the collision process, and then the second metal plate, the front longitudinal beam assembly, the cabin boundary beam and the third metal plate surround to form an energy absorption cavity to participate in deformation, namely the front longitudinal beam assembly and the cabin boundary beam integrally participate in deformation and energy absorption, so that the collision force is greatly counteracted, the deformation of the single-side structure is effectively reduced, and the cabin longitudinal beam is prevented from being bent and seriously invading into a passenger cabin.

3. According to the invention, the second metal plate and the third metal plate are pre-connected with the front longitudinal beam assembly and the cabin boundary beam in a welding mode, and are connected with each other through bolts in a reinforcing manner, so that the connection stability of the second metal plate and the third metal plate with the front longitudinal beam assembly and the cabin boundary beam is improved, the second metal plate and the third metal plate are prevented from being torn during collision due to unstable connection, and the effective transmission of collision force is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic view of the connection of the first sheet metal of the present invention;

FIG. 4 is a schematic connection diagram of a second sheet metal of the present invention;

FIG. 5 is a schematic connection diagram of a third sheet metal of the present invention;

FIG. 6 is a schematic structural view of a second sheet metal of the present invention;

fig. 7 is a schematic structural diagram of a third sheet metal according to the present invention.

In the figure, 1-front collision beam, 2-energy absorption box, 21-upper plate, 22-lower plate, 3-front longitudinal beam assembly, 31-inner plate, 32-outer plate, 33-first connecting plate, 4-cabin boundary beam, 41-second connecting plate, 411-fourth overlapping edge, 42-first plate, 43-second plate, 5-first sheet metal, 51-first overlapping edge, 52-second overlapping edge, 53-third overlapping edge, 6-second sheet metal, 61-first flanging, 62-second flanging, 7-third sheet metal, 71-bending part, 72-second flanging, 73-third flanging, 74-fourth flanging, 8-first bolt, 9-second bolt.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 7, the front longitudinal beam energy absorption structure shown includes a front collision beam 1, an energy absorption box 2, a front longitudinal beam assembly 3, a cabin boundary beam, a first metal plate, a second metal plate, and a third metal plate, the front collision beam, the energy absorption box, and the front longitudinal beam assembly are sequentially connected in a front-to-rear direction, the cabin boundary beam is disposed outside the front longitudinal beam assembly, and it should be noted that the outside refers to a direction, away from the center of the vehicle, of the front longitudinal beam assembly in a left-right direction.

In this embodiment, the front longitudinal beam energy absorption structure is arranged on the left side of the whole vehicle, and it should be noted that the front longitudinal beam energy absorption structure can also be arranged on the right side of the whole vehicle or on both the left side and the right side of the whole vehicle, and can be reasonably selected according to actual performance requirements.

The energy absorption box 2 comprises an upper plate 21 and a lower plate 22 which surround to form a second energy absorption cavity, the right end portion of a first metal plate 5 is provided with a first overlapping edge 51 connected with the upper plate 21 through a bolt and a second overlapping edge 52 connected with the lower plate 22 through a bolt, the left end of the first metal plate 6 is provided with a third overlapping edge 53 connected with a second connecting plate 41 at the front end of the side beam 4 of the cabin through a bolt, and the third overlapping edge 53 is attached to the front side face of the second connecting plate 41.

The front longitudinal beam assembly 3 comprises a left and a right overlapped inner plates 31 and an outer plate 32 and a first connecting plate 33 welded and fixed with the front end of the inner plate 31, and the upper edges and the lower edges of the inner plate 31 and the outer plate 32 are provided with mutually connected welding flanges. The nacelle edge beam 4 includes a first plate 42 and a second plate 43 connected to each other at left and right sides, and a second connecting plate 41 welded to a front end of the first plate 42.

The second sheet metal 6 is transversely arranged between the upper edge of the inner plate 31 of the front longitudinal beam assembly 3 and the upper edge of the second plate 43 of the cabin boundary beam 4. The left end and the right end of the second metal plate 6 are provided with first flanges 61 which are bent upwards and are welded and fixed with the upper edge of the second plate 43 of the engine room boundary beam 4 and the upper edge of the outer plate 32 of the front longitudinal beam assembly 3 through the first flanges at the left end and the right end. In order to enhance the connection stability between the second metal plate 6 and the front side member assembly 3, the first bolt 8 is connected with the upper edge of the front side member assembly 3 through the first flange 61, and in order to enhance the connection stability between the inner plate 31 and the outer plate 32, the first bolt 8 is also used for connecting the upper edges of the inner plate 31 and the outer plate 32 on the basis of welding and fixing the inner plate 31 and the outer plate 32.

The third sheet metal 7 is longitudinally arranged below the second sheet metal 6, the left end and the right end are provided with bending parts 71 which are welded and fixed with the front inner side surface of the cabin boundary beam 4 and the front outer side surface of the front longitudinal beam assembly 3, and the top end is provided with a fourth flanging 74 which is welded and fixed with the lower surface of the second sheet metal 6. In order to enhance the connection stability of the third metal plate 7 with the cabin boundary beam 4 and the front longitudinal beam assembly 3, a second flanging 72 welded and fixed with the lower edge of the front longitudinal beam assembly 3 is arranged on the right side of the lower end of the third metal plate 7, and a third flanging 73 welded and fixed with the lower edge of the cabin boundary beam 4 is arranged on the left side of the lower end. The front longitudinal beam assembly 3, the cabin boundary beam 4, the second metal plate 6 and the third metal plate 7 surround to form a first energy absorption cavity.

In order to enhance the connection stability of the third metal plate 7 and the front longitudinal beam assembly 3, the second bolt 9 is connected with the lower edge of the front longitudinal beam assembly 3 through the second flanging 72. Meanwhile, in order to enhance the connection stability of the inner plate 31 and the outer plate 32, the lower edges of the inner plate 31 and the outer plate 32 are connected by the second bolts 9 on the basis of welding and fixing the inner plate 31 and the outer plate 32.

The arrangement of the first bolt 8 and the second bolt 9 improves the connection stability of the second metal plate 6, the third metal plate 7, the front longitudinal beam assembly 3 and the cabin boundary beam 4, the tearing caused by unstable connection during collision is avoided, and the effective transmission of collision force is ensured.

Through set up first panel beating 5 between 2 lateral surfaces of energy-absorbing box and 4 preceding terminal surfaces of cabin boundary beam, when the offset collision takes place in whole car left side, the stress point contacts with first panel beating 5 earlier, make first panel beating 5 at first take place to warp, in whole car + X direction stress direction, 5 pulling energy-absorbing box 2 of first panel beating warp, receive the influence that front impact crossbeam 1 resisted deformability, and then transmit the collision force to whole car right side through front impact crossbeam 1, make the energy-absorbing box on right side participate in the atress, successfully decompose single side offset impact atress to whole car left side, right side both sides, the deflection of left side structure has effectively been reduced.

Because transversely arranged second panel beating 6, longitudinal arrangement have third panel beating 7 between front longitudinal beam assembly 3 front portion and cabin boundary beam 4 front portion, along with going on of whole car left side biasing collision process, left side overall structure is in X to the certain degree of collapsing, subsequently second panel beating 6, front longitudinal beam assembly 3, cabin boundary beam 4 and third panel beating 7 surround and constitute the energy-absorbing chamber and participate in the deformation, and front longitudinal beam assembly 3 and cabin boundary beam 4 are whole to participate in the deformation energy-absorbing promptly, and the impact has been offset by a wide margin, has effectively reduced the deflection of left side structure, has avoided the crooked passenger compartment of seriously invading of cabin longitudinal beam, has improved the energy-absorbing effect of front longitudinal beam assembly 3 when the biasing is collided.

A vehicle comprises a vehicle body assembly, wherein the vehicle body assembly comprises the front longitudinal beam energy absorption structure.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.