CN215883806U - Vehicle body front end collision energy-absorbing structure - Google Patents

Abstract

The utility model provides a front-end collision energy-absorbing structure of a vehicle body. The structure comprises a front anti-collision beam connected with the front ends of the front longitudinal beams of the nacelle on both sides, and a front nacelle connected between the side beams of the front wheel house on both sides. beam. Among them, the front anti-collision beam has a protruding section extending to the outside of the front longitudinal beam of the nacelle; the upper beam of the front nacelle is located behind and above the front anti-collision beam, and arches out to the front of the vehicle body. In addition, a front shock absorber seat is arranged on the inner side of the side beam of the front wheel house, and an energy absorption box of the upper beam of the front nacelle is arranged between the upper beam of the front nacelle and the front shock absorber seat. The front-end collision energy-absorbing structure of the utility model can effectively improve the structural strength of the upper part of the front-end of the vehicle body by arranging the upper beam of the front cabin in the front arch structure and the energy-absorbing box of the upper beam of the front cabin. The cushioning effect helps to improve the collision protection performance of the upper part of the front end of the body.

Description

Front-end collision energy-absorbing structure

technical field

The utility model relates to the technical field of automobile body structures, in particular to a front end collision energy absorbing structure of a body.

Background technique

In the design of the body frame of the front cabin of an automobile, safety and lightweight design are important issues that affect each other and need to be considered.

In the structure of the front cabin body frame, the front anti-collision beam is mainly used to receive the collision from the front of the vehicle. The front anti-collision beam is generally connected to the front longitudinal beam of the cabin through structures such as the front anti-collision beam energy-absorbing box and the connecting bracket; the front anti-collision beam The received collision impact force is transmitted to the front longitudinal beam of the cabin along the path of the front crash beam, the energy absorption box of the front crash beam and the connecting bracket. The front anti-collision beam and the energy-absorbing box of the front anti-collision beam are mainly used to deal with the collision from the front of the vehicle, so as to play the role of buffering energy absorption and avoid the excessive impact force being directly transmitted to the front longitudinal beam of the cabin. In turn, the impact force may be transmitted to the cockpit by the front longitudinal beam of the cabin, or even the longitudinal beam of the cabin directly penetrates the cockpit, which will adversely affect the personal safety of the occupants.

In the above-mentioned body frame structure, the installation positions of the front anti-collision beam and the front longitudinal beam of the nacelle are relatively low. The radiator at the front end of the body and the parts above it lacks the necessary collision protection measures. When the collision has a large impact on the upper part of the front end of the body, the impact force is easily transmitted to the interior of the front cabin, causing serious damage to core components such as the engine. damage. Moreover, due to the lack of necessary protection and buffer structure settings, the excessive impact force may also impact the components in the front cabin and move back, and intrude into the cockpit, causing injury to the occupants.

In addition, the existing connecting bracket used for the connection between the front anti-collision beam and the front longitudinal beam of the nacelle is fixedly installed at the front end of the front longitudinal beam of the nacelle. Generally, the structure is relatively simple. It mainly plays the role of connection and installation, and may also shoulder the Installation and connection of peripheral components such as front subframe and cabin lock installation beam. When the impact force from the front crash beam reaches this connecting bracket, the impact force is transmitted directly to the front longitudinal beam of the nacelle.

In the actual vehicle collision, in addition to the collision from the front of the vehicle, there is also a small offset collision from the front side of the vehicle. The impact force of the collision at this moment comes from one end of the front crash beam and is transmitted at an inclined angle towards the middle of the front cabin. The energy-absorbing and buffering function of the front anti-collision beam energy-absorbing box connecting the bracket and the front anti-collision beam bracket is difficult to be fully exerted. When the impact force reaches the end of the front longitudinal beam of the cabin, it will cause huge torsional impact damage to the front longitudinal beam of the cabin, which may destroy the entire body frame structure at the front cabin, and affect the components in the front cabin, and even Impact injury to occupants in the cockpit.

Utility model content

In view of this, the present utility model aims to provide a front-end collision energy absorbing structure of a vehicle body, so as to improve the collision protection performance of the upper part of the front-end of the vehicle body.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A front-end collision energy-absorbing structure of a vehicle body, comprising a front anti-collision beam connected with the front ends of the front longitudinal beams of the cabin on both sides, and a front cabin upper beam connected between the side beams of the front wheel house on both sides; wherein,

The front anti-collision beam has a projecting section extending to the outer side of the front longitudinal beam of the nacelle; the upper cross beam of the front nacelle is located at the rear and upper part of the front anti-collision beam, and is arched toward the front of the vehicle body;

A front shock absorber seat is arranged on the inner side of the side beam of the front wheel house, and an energy absorption box of the upper beam of the front engine room is arranged between the upper beam of the front engine room and the front shock absorber seat.

Further, each end of the upper beam of the front nacelle is detachably connected to the side beam of the front wheel house on the corresponding side; the energy-absorbing box of the upper beam of the front nacelle is detachably connected to the upper beam and the Between the front shock absorber seats; along the direction pointing to the front of the vehicle body, the upper beam energy-absorbing boxes on each side of the front nacelle are all inclined outwardly arranged.

Further, each end of the upper beam of the front nacelle is detachably connected to the side beam of the front wheel house through the upper beam connecting plate; the side of the front shock absorber seat is provided with a connecting platform; One end of the beam energy-absorbing box is connected to the connection platform; the other end of the upper beam energy-absorbing box of the front nacelle is connected to the upper beam of the front nacelle through a connecting plate.

Further, the upper beam energy-absorbing box of the front nacelle is in a grid shape formed by interlacing and connecting a plurality of plates.

Further, the upper beam of the front nacelle adopts a pipe beam; along the direction toward the rear of the vehicle body, both ends of the upper beam of the front nacelle connected to the side beams of the front wheel house on both sides are arranged in a gradually rising trend.

Further, connecting seats are respectively connected to the front ends of the front longitudinal beams of the nacelle; the front anti-collision beams are connected to the front longitudinal beams of the nacelle through the connecting seats; an energy absorbing part; the energy absorbing part is located on the outer side of the front longitudinal beam of the nacelle and protrudes to the rear of the connecting seat; along the length direction of the vehicle body, the energy absorbing part is located between the protruding section and the front Between the upper beam energy-absorbing boxes in the cabin.

Further, along the direction to the front longitudinal beam of the nacelle, the protruding height of the energy absorbing portion gradually increases.

Further, the connecting seat includes a structural main body; the front longitudinal beam of the nacelle and the front anti-collision beam are connected on both sides of the structural main body; one side of the energy-absorbing part is fixedly connected to the front longitudinal beam of the nacelle .

Further, the upper beam of the front nacelle is connected to the top of the structural body.

Further, the front anti-collision beam is connected to the connecting seat through a front anti-collision beam energy-absorbing box.

Compared with the prior art, the utility model has the following advantages:

In the front-end collision energy absorption structure of the utility model, by arranging the front nacelle upper beam in the front arch structure, the two ends of the front nacelle upper beam are respectively connected with the front ends of the two front wheel house side beams, and at the same time on the front nacelle The upper beam energy-absorbing box of the front cabin is added between the beam and the front shock absorber seat, which can effectively improve the structural strength of the upper part of the front end of the body; and when the upper front end of the body is subjected to an external collision, the upper beam energy-absorbing box of the front cabin and the front cabin The front arch structure of the upper beam can absorb kinetic energy due to its own deformation and collapse, which has a good buffering effect and helps to improve the collision protection performance of the upper part of the front end of the vehicle body.

In addition, a connecting seat is arranged between the front longitudinal beam of the nacelle and the front anti-collision beam. By designing an energy-absorbing part on the outside of the structural body of the connecting seat, when the protruding sections at both ends of the front anti-collision beam are subjected to a small offset collision from the front side , After the impact force is transmitted to the main body of the structure, the energy-absorbing part will collapse and deform to absorb part of the impact energy, and then the remaining impact force will be transmitted to the front longitudinal beam of the cabin, so that the front longitudinal beam of the cabin will be transmitted to the cockpit The impact force is reduced, which helps to improve the cushioning and energy absorption of the front part of the body in the event of a small offset collision.

Description of drawings

The accompanying drawings that form a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model. It is only used to represent the relative positional relationship, and does not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic diagram of the overall structure of the front-end collision energy-absorbing structure of the vehicle body according to the first embodiment of the present invention, which is arranged in the body frame of the front cabin;

FIG. 2 is a schematic structural diagram of the front-end collision energy absorption structure of the vehicle body connected between the peripheral components according to the first embodiment of the present utility model;

Fig. 3 is the partial structure schematic diagram shown in Fig. 2;

Fig. 4 is the exploded view of each component shown in Fig. 3;

5 is a schematic diagram of the assembly and connection structure of the connecting seat and the front longitudinal beam of the nacelle according to Embodiment 1 of the present utility model;

6 is a schematic diagram of the structure of the rear and outer sides of the connecting seat according to the first embodiment of the present invention;

7 is a schematic diagram of the rear inner side structure of the connecting seat according to the first embodiment of the present invention;

Description of reference numbers:

1. Structural main body; 10. Cabin longitudinal beam connection part; 100, longitudinal beam connection hole; 101, connection body; 102, connection cavity; 11, energy absorption part; 111, longitudinal plate body; 112, transverse plate body; 12, Front sub-frame connection part; 120. Front sub-frame installation connection hole; 13. Reinforcing plate body; 141. Front anti-collision beam energy-absorbing box connecting hole; 142. Front anti-collision beam energy-absorbing box pre-positioning column; 15. connecting bracket; 150, first connecting hole; 16, radiator mounting bracket; 17, flanging; 18, weight reduction hole;

2. Front longitudinal beam of engine room; 20. End;

3. Front anti-collision beam; 30. Front anti-collision beam energy-absorbing box; 300. Extending section;

4. Front subframe;

5. Upper beam of front engine room; 50. Energy-absorbing box of upper beam of front engine room; 51. Connecting plate of upper beam; 500. Connecting plate; 501. Plate body; 502. Second connecting hole;

6. Rear beam of front engine room; 7. Side beam of front wheel house; 8. A-pillar;

9. Front shock absorber seat; 90. Connecting table.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inside", and "back" appear to indicate orientation or positional relationship, they are based on the orientation or position shown in the accompanying drawings. The relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention; if The appearance of terms such as "first", "second", etc., is also used for descriptive purposes only and should not be understood as indicating or implying relative importance.

In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connected" and "connecting member" should be construed in a broad sense. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium, or two elements Internal connectivity. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The present embodiment relates to a collision energy absorbing structure for the front end of the vehicle body, which can improve the collision protection performance of the upper part of the front end of the vehicle body.

In general, the front-end collision energy-absorbing structure of the vehicle body includes a front anti-collision beam 3 connected with the front ends of the front longitudinal beams 2 of the nacelle on both sides, and a front nacelle upper beam 5 connected between the front wheel house side beams 7 on both sides. . The front anti-collision beam 3 has a projecting section extending to the outer side of the front longitudinal beam 2 of the nacelle, and the front nacelle upper beam 5 is located behind and above the front anti-collision beam 3 and arches forward of the vehicle body. In addition, a front shock absorber 9 seat is arranged inside the front wheel house side member 7 , and a front cabin upper beam energy-absorbing box 50 is arranged between the front cabin upper beam 5 and the front shock absorber seat 9 .

Based on the above-mentioned design ideas, an exemplary structure of the front-end collision energy-absorbing structure of the present embodiment provided in the body frame of the front cabin is shown in FIG. 1 , which mainly includes the upper beam 5 of the front cabin and the upper beam of the front cabin Energy absorbing box 50 .

In order to facilitate the understanding of the scheme, the general structure of the front nacelle body frame is first described. As shown in FIG. 1 , in the front cabin body frame, there are front crash beams 3 , cabin front longitudinal beams 2 , front cabin rear beams 6 , front wheel house side beams 7 and A-pillars 8 , etc.

Among them, the rear cross member 6 of the front cabin is located approximately between the two A-pillars 8 and between the cockpit and the front cabin. The two nacelle front longitudinal beams 2 arranged symmetrically on the left and right are located in the middle and lower part of the front nacelle, the rear end is fixedly connected with the rear beam 6 of the front nacelle, and the front end is connected with the front anti-collision beam 3 . A front subframe 4 is provided below the front side member 2 of the nacelle. In order to facilitate the connection and assembly between the front crash beam 3 and the front longitudinal beam 2 of the nacelle, a connecting seat 1 is provided between the two. Obviously, the connection bases 1 are two symmetrically arranged. Of course, a front anti-collision beam energy-absorbing box 30 can also be added between the front anti-collision beam 3 and the connecting seat 1; the front anti-collision beam 3 is connected to the connecting seat 1 through the front anti-collision beam energy-absorbing box 30, which can improve the vehicle overall crash safety.

Taking the above-mentioned front nacelle body frame as an example, as shown in FIG. 2 , the front-end collision energy absorption structure of the vehicle body of this embodiment is arranged in the frame and is located at the upper part of the front end. The upper beam 5 of the front nacelle is partially bent, and the middle part is arched toward the front of the vehicle body; both ends of the upper beam 5 of the front nacelle extend rearward from both sides of the vehicle body respectively, and are connected to the front wheel house side beam 7 on the corresponding side. At positions close to both sides of the vehicle body, two energy-absorbing boxes 50 on the upper beam of the front nacelle are respectively arranged, and each energy-absorbing box 50 on the upper beam of the front nacelle is connected to the upper beam 5 of the front nacelle and the front shock absorber seat 9 on the corresponding side between. Through this arrangement, relying on the front wheel house side beam 7 and the front shock absorber seat 9, the front nacelle upper beam 5 and the front nacelle upper beam energy-absorbing box 50 together form a frame-type reinforcement structure, which is formed on the upper part of the front end of the vehicle body. Good reinforcement and buffer energy absorption, so that the collision protection performance of this part can be improved.

For the connection between the upper cross beam 5 of the front nacelle and the front wheel house side beam 7, welding, screwing or plug-in connection can be used. As shown in FIG. 3 in conjunction with FIG. 4 , in this embodiment, the left and right ends of the upper beam 5 of the front nacelle and the front end of the front wheel house side beam 7 on the corresponding side are assembled in a detachable connection; Both ends of the upper beam 5 are respectively connected with the front wheel house side beams 7 on the corresponding side through the upper beam connecting plates 51 . Specifically, the upper beam connecting plate 51 can be fixedly connected to the end of the upper beam 5 in the front nacelle by bolts, riveting or welding, and a detachable connection structure is formed between the upper beam connecting plate 51 and the front wheel house side beam 7 .

A detachable connection structure is adopted between the upper beam 5 of the front engine room and the side beam 7 of the front wheel house, which is convenient for the replacement and maintenance of the upper beam 5 of the front engine room. By pre-fixing the upper beam connecting plate 51 at the end of the upper beam 5 in the front nacelle, and then connecting the upper beam connecting plate 51 and the front end of the front wheel house side beam 7, the front nacelle upper beam 5 and the front wheel house side beam are connected. The addition of an intermediate component between 7 is not only conducive to the separate structure and assembly, but also can alleviate the impact force transmitted to the front wheel house side beam 7 by the front nacelle upper beam 5 that has been collided with.

Based on the above configuration, the upper cross member connecting plate 51 and the front wheel house side member 7 are preferably connected by a screw structure. A plurality of second connecting holes 502 can be opened on the front end of the front wheel house side beam 7 and the upper beam connecting plate 51, and the front wheel house side beam 7 and the front wheel house side beam 7 and the front wheel house side beam 7 and the The upper beam connecting plates 51 are fastened together. The screw connection structure has the advantages of convenient assembly operation and reliable connection strength.

As for the arrangement posture of the upper beam 5 of the front nacelle, the upper beam 5 of the front nacelle can be arranged in a horizontal plane, or the upper beam 5 of the front nacelle can be arranged in an inclined posture. As shown in FIG. 2 and FIG. 3 , in the direction toward the rear of the vehicle body, both ends of the front nacelle upper cross member 5 extending toward the rear of the vehicle body in this embodiment are arranged in a gradually rising trend. In this way, the front arched part of the upper beam 5 of the front cabin can be made to sag relatively. When the upper beam 5 of the front cabin is subjected to a strong collision, the upper beam 5 of the front cabin can be turned down and bent and deformed, thereby greatly reducing the impact force. , which helps to improve the safety protection performance of the front-end collision energy-absorbing structure.

The main function of the above-mentioned front nacelle upper beam energy-absorbing box 50 is to form a support between the front nacelle upper beam 5 and the front shock absorber seat 9, and can rely on its own deformation and collapse performance to achieve the impact force from the front nacelle upper beam 5. Energy absorption and cushioning. Based on the purpose of arranging the upper beam energy-absorbing boxes 50 in the front nacelle, in this embodiment, preferably, along the direction pointing to the front of the vehicle body, the upper beam energy-absorbing boxes 50 on each side of the front nacelle are also arranged in a cambered shape, and Connected to the upper beam 5 of the front cabin. The arrangement with the front part inclined outwards towards both sides helps the upper beam energy-absorbing box 50 of the front nacelle to be able to bend and deform toward the outside when it collapses and deforms, thereby improving the deformation absorption of the upper beam energy-absorbing box 50 of the front nacelle. It is beneficial to further improve the protection effect of the front-end collision energy-absorbing structure of the vehicle body.

As shown in FIG. 4 , in order to facilitate the connection and assembly between the upper beam energy-absorbing box 50 of the front nacelle and the front shock absorber base 9 , the upper beam energy-absorbing box 50 of the front nacelle in this embodiment is also detachably connected to the front nacelle. Between the upper beam 5 and the front shock absorber seat 9. Specifically, a connecting platform 90 is provided on the side of the front shock absorber seat 9; one end of the upper beam energy-absorbing box 50 of the front nacelle is connected to the connecting platform 90, and the other end of the upper beam energy-absorbing box 50 of the front nacelle passes through the connecting plate 500 is attached to the upper cross member 5 of the front nacelle. Wherein, the connecting plate 500 may be two plates integrally formed on the upper beam energy-absorbing box 50 of the front nacelle and arranged at an upper and lower interval, and the upper beam 5 of the front nacelle is sandwiched by the two plates.

By arranging the connection platform 90 on the front shock absorber seat 9, the connection and installation between the energy absorbing box 50 of the upper beam of the front nacelle and the front shock absorber seat 9 is facilitated; The connection assembly between the energy absorbing box 50 and the upper beam 5 of the front nacelle. Similarly, the connection method of the front end of the beam energy-absorbing box 50 on the front nacelle can be fastened by using bolts and nuts to cooperate with the second connecting holes 502 on the connecting plate 500. Generally, a detachable connection form such as screw connection is also used.

In order to enhance the collapse energy-absorbing effect of the upper beam energy-absorbing box 50 in the front nacelle, the upper beam energy-absorbing box 50 in the front nacelle may adopt a multi-cavity structure, a box structure, or the like. In this embodiment, the upper beam energy-absorbing box 50 of the front nacelle is arranged in a grid shape formed by interlacing and connecting a plurality of plate bodies 501 .

In addition, the front nacelle upper beam 5 and the nacelle front longitudinal beams 2 located on both sides of the vehicle body are respectively connected by connecting seats 1; and, preferably, the front nacelle upper beam energy-absorbing boxes 50 on both sides are set to correspond to The outer part of the connection base 1 is provided. Fasten the upper beam 5 of the front cabin on the top of the connecting seat 1 to form a connection between the upper beam 5 of the front cabin and the front longitudinal beam 2 of the cabin. The anti-collision beam 3 and the front nacelle rear beam 6 together form a frame-type integral skeleton structure, which can not only improve the connection stability of the front nacelle upper beam 5, but also help improve the overall strength and protection performance of the front nacelle body frame. However, setting the upper beam energy-absorbing box 50 of the front nacelle to correspond to the outer position of the connecting seat 1 can fully exert the deformation buffering effect of the front arch structure in the middle of the upper beam 5 of the front nacelle, through the connecting seat 1 and the front nacelle. The front and rear arrangement of the beam energy-absorbing box 50 achieves multi-stage energy absorption, and is also beneficial to improve the protection capability of the front end of the vehicle body against small offset collisions.

Regarding the material of the main components in the front-end collision energy-absorbing structure of the vehicle body in this embodiment, the upper beam 5 of the front cabin is preferably made of high-strength profiles, such as high-strength steel, and preferably, the upper beam 5 of the front cabin can be made of pipes The beam; the upper beam energy-absorbing box 50 of the front cabin preferably adopts an aluminum alloy extrusion structure.

The setting of the upper beam 5 of the front engine room and the energy-absorbing box 50 of the upper beam of the front engine room, the upper beam 5 of the front engine room to the side beam 7 of the front wheel house, the upper beam 5 of the front engine room to the energy-absorbing box 50 of the upper beam of the front engine room, and the upper beam of the front engine room A plurality of impact force transmission and buffering channels are formed between 5 and the connecting seat 1; and a closed annular structure is formed on the upper part of the front nacelle, so that the safety performance under the collision condition of the front nacelle is enhanced. The detachable setting of the upper beam 5 in the front cabin not only does not affect the maintenance of the air conditioner radiator, but also facilitates the maintenance and replacement of the upper beam 5 in the front cabin. Moreover, the skeleton composed of the front anti-collision beam 3, the upper beam 5 of the front cabin, the front longitudinal beam 2 of the cabin, and the rear beam 6 of the front cabin provide a closed cavity for the front cabin, so that the overall rigidity of the front cabin can be improved. , which is conducive to improving the torsional stiffness and NVH (abbreviation of Noise, Vibration, Harshness, referring to noise, vibration and harshness) performance of the vehicle.

To sum up, by arranging the front nacelle upper beam 5 in the front arch structure, the two ends of the front nacelle upper beam 5 are respectively connected to the front ends of the two front wheel house side beams 7, and at the same time, the front nacelle upper beam 5 and the front reducer are connected. The front nacelle upper beam energy-absorbing box 50 is added between the shock absorbers 9, which can effectively improve the structural strength of the upper part of the front end of the body; The front arch structure of the cross member 5 can absorb kinetic energy due to its own deformation and collapse, and has a good buffering effect, which helps to improve the collision protection performance of the upper part of the front end of the vehicle body.

In addition, as shown in FIG. 5 in conjunction with FIG. 1 , in order to make the front-end collision energy-absorbing structure of the present embodiment have the protection functions of connection and upper part, and at the same time have the effect of buffering and energy-absorbing for small offset collisions, the A connecting seat is provided between the front longitudinal beam 2 of the nacelle and the front anti-collision beam 3 ; the connecting seat includes a structural main body 1 , a longitudinal beam connecting portion 10 and an energy absorbing portion 11 provided on the structural main body 1 .

Specifically, the structural main body 1 preferably adopts a plate-like structure. In the assembled state, the front side is used to connect the front crash beam 3 , and the cabin front longitudinal beam 2 is located on the rear side of the structural main body 1 . The above-mentioned nacelle longitudinal beam connecting portion 10 and energy absorbing portion 11 are provided on the rear side of the structural main body 1 corresponding to the nacelle front longitudinal beam 2 , and may be located in the middle or the lower part. Preferably, the cabin longitudinal beam connecting part 10 and the energy absorbing part 11 are provided at the lower part of the structural main body 1 . In addition, the energy absorbing portion 11 is provided at an outer position of the nacelle longitudinal beam connecting portion 10 and protrudes toward the rear of the structural body 1 .

It should be noted that the small offset collision from the front anti-collision beam 3 mostly occurs in the extended section 300 extending to the outside of the front longitudinal beam 2 of the nacelle; In order to facilitate the energy absorbing part 11 to absorb the impact force of the small offset collision. Moreover, from the longitudinal direction of the vehicle body, the energy absorbing portion 11 should be arranged between the protruding section 300 and the upper beam energy absorbing box 50 of the front nacelle, thereby forming the front crash beam 3 and its front crash beam energy absorbing box 30. The three-stage collision buffer structure layout in which the energy-absorbing part 11 of the connecting seat and the energy-absorbing box 50 of the upper beam of the front cabin are arranged in sequence greatly improves the collision protection performance of the vehicle.

At the same time, longitudinal beam connecting holes 100 for connecting the cabin longitudinal beam 2 are respectively provided on the cabin longitudinal beam connecting portion 10 and the energy absorbing portion 11, so that the cabin longitudinal beam 2 is connected and fastened to the cabin longitudinal beam connecting portion 10. At the same time, it is also tightly connected with the energy absorbing part 11 to ensure the stability of the supporting foundation of the energy absorbing part 11 .

Through the above arrangement, when the impact force generated by the small offset collision from the end of the front bumper beam 3 reaches the structural main body 1, the energy absorbing part 11 located at the lower part of the rear side of the structural main body 1 and located on the outer side will first bear the impact force. The impact will be deformed and collapsed, so as to greatly relieve the impact force transmitted to the front longitudinal beam 2 of the nacelle.

Moreover, the structural main body 1 is designed as a plate-like structure, which is not only convenient for construction, but also meets the arrangement requirements of the cabin longitudinal beam connecting portion 10 and the energy absorbing portion 11 on the structural main body 1 . Avoiding the arrangement positions of the cabin longitudinal beam connecting part 10 and the energy absorbing part 11 on the structural body 1 , weight-reducing holes 18 can be opened in other parts; The arrangement of the flanges 17 and/or the weight-reducing holes 18 on the structural body 1 can not only improve the overall strength of the structural body 1 , but also effectively reduce the weight of the structural body 1 . Obviously, only one or both of the above mentioned flanges 17 and weight reduction holes 18 may be provided.

The arrangement form of the energy absorbing portion 11 may be different structures such as a box, a profile, a plate, and a grid-like chamber. In this embodiment, as shown in FIG. 6 , the overall height of the energy absorbing portion 11 protruding rearward gradually increases from the outermost side of the structural body 1 toward the nacelle longitudinal beam connecting portion 10 . The energy-absorbing part 11 is designed to be a gradual structure with a higher bulge height as it is closer to the connecting part 10 of the cabin longitudinal beam, which can exert a gradual deformation and collapse effect according to the different impact force, so that the closer to the front longitudinal beam 2 of the cabin, the collapse can be achieved. The greater the energy absorbing performance, is beneficial to improve the safety and effectiveness of the energy absorbing portion 11 .

In this embodiment, one side of the energy absorbing portion 11 is fixedly connected to the front longitudinal beam 2 of the nacelle. In terms of specific structure, the energy absorbing portion 11 includes a longitudinal plate body 111 fixedly connected to the structural main body 1 , and a transverse plate body 112 fixedly connected between the structural main body 1 and the longitudinal plate body 111 . Preferably, the longitudinal plate bodies 111 are perpendicular to the structural main body 1 and extend toward the rear; the transverse plate bodies 112 are arranged at intervals up and down, and are both perpendicular to the structural main body 1 and the longitudinal plate bodies 111 . The longitudinal plate body 111 is provided with longitudinal beam connecting holes 100 for fixing the front longitudinal beam 2 of the nacelle.

The vertical and horizontal plates 111 and 112 intersect with each other, which is convenient for processing and has good connection strength. Moreover, when the energy-absorbing portion 11 deforms and collapses, it can achieve significant energy-absorbing and buffering effects.

In addition, a front subframe mounting connection hole 120 may also be provided at the bottom of the energy absorbing portion 11 for connecting and fixing the front subframe 4 of the vehicle. The front sub-frame mounting connection holes 120 are arranged at the bottom of the energy-absorbing portion 11 , which not only can meet the connection and installation requirements of the front-end collision energy-absorbing structure of the vehicle body for the front sub-frame 4 , but also help to reduce the collision impact from the front anti-collision beam 3 The transmission of the force to the front subframe 4 has a certain effect on the buffer protection of the front subframe 4 .

When the energy absorbing portion 11 adopts the structure of the longitudinal plate body 111 and the transverse plate body 112, a front sub-frame connecting portion 12 can be provided between the transverse plate body 112 at the lowermost end and the adjacent transverse plate body 112, The above-mentioned front sub-frame mounting connecting hole 120 is provided on the front sub-frame connecting portion 12 , and at the same time, the front sub-frame mounting connecting hole 120 is provided with an opening on the lowermost horizontal plate body 112 . In addition, the front sub-frame connecting portion 12 can also be constituted by the horizontal plate body 112 at the lowermost end. The rod realizes the connection with the front subframe 4 .

At the same time, corresponding to the connecting portion 12 of the front subframe, a reinforcing plate body 13 is provided between the two lateral plate bodies 112 adjacent to each other above. Since the plurality of transverse plates 112 are arranged at intervals up and down, the front subframe connecting portion 12 is provided based on the lowermost transverse plate 112 , which facilitates the connection and installation of the front subframe 4 on the energy absorbing portion 11 . However, adding the reinforcing plate body 13 between the adjacent lateral plate bodies 112 can improve the connection strength between the lateral plate bodies 112, which is beneficial to ensure that the load-bearing capacity of the connecting portion 12 of the front sub-frame meets the requirements of the front sub-frame 4 installation requirements.

As shown in FIG. 6 and in conjunction with FIG. 7 , the connecting part 10 of the nacelle longitudinal beam in this embodiment includes a connecting body 101 fixed on the structural main body 1; both ends of the connecting body 101 are connected with the longitudinal plate body 111; the connecting body 101 is integrally In a semi-enclosed shape, a connecting cavity 102 is formed around the longitudinal plate body 111 , and the end 20 of the front end of the front end of the front longitudinal beam 2 of the nacelle is inserted into the connecting cavity 102 . The connecting body 101 is also provided with several longitudinal beam connecting holes 100 for fixing the front longitudinal beam 2 of the nacelle. At the connecting part 10 of the nacelle longitudinal beam of the structural main body 1, a connecting body 101 with both ends fixedly connected to the longitudinal plate body 111 is provided, so that the connecting body 101 and the longitudinal plate body 111 together form a connecting cavity 102, which is convenient for the front of the nacelle. The plug-in connection of the longitudinal beam 2; the end 20 of the front longitudinal beam 2 of the nacelle is fastened in the connecting cavity 102 through the connecting body 101 and the plurality of longitudinal beam connecting holes 100 opened on the longitudinal plate body 111, which can ensure the structural main body 1 The firmness of the connection with the front longitudinal beam 2 of the nacelle. The specific fixing method may be to use bolts to pass through the longitudinal beam connecting holes 100 and screw them into the threaded holes provided on the end 20 to realize the fastened connection of the cabin front longitudinal beam 2 at the cabin longitudinal beam connecting portion 10 .

As shown in FIG. 5 and FIG. 1 , a connection hole 141 of a front crash beam energy absorbing box is provided at the lower part of the front side of the structural main body 1 . When the front anti-collision beam energy absorbing box 30 is provided between the front anti-collision beam 3 and the structural body 1, the front anti-collision beam energy absorbing box 30 can be fastened in the connecting hole 141 of the front anti-collision beam energy absorbing box by using bolts. Specifically, two front crash beam energy-absorbing box connecting holes 141 may be provided on the upper and lower sides of the nacelle longitudinal beam connecting portion 10 respectively, and a front crash beam energy-absorbing box connecting hole 141 may be provided on the structural main body 1 at a position adjacent to the front crash beam energy-absorbing box connecting hole 141. The pre-positioning column 142 of the anti-collision beam energy-absorbing box; corresponding to the pre-positioning column 142 of the energy-absorbing box of the front anti-collision beam, a positioning hole is provided on the energy-absorbing box 30 of the front anti-collision beam.

When installing the front anti-collision beam energy-absorbing box 30, the front anti-collision beam energy-absorbing box 30 is first positioned by the pre-positioning column 142 of the front anti-collision beam energy-absorbing box, and the front anti-collision beam energy-absorbing box 30 is tightened using bolts. . The above arrangement not only facilitates the assembly operation, but also the position of the front anti-collision beam energy-absorbing box 30 is just opposite to the nacelle longitudinal beam connecting part 10 and the energy-absorbing part 11, which is beneficial to the small offset from the front anti-collision beam energy-absorbing box 30 The impact force of the collision is directly transmitted to the energy absorbing portion 11 , which is helpful for the front end collision energy absorbing structure to play the role of buffering and absorbing energy.

In addition, the top of the structural main body 1 is provided with a connecting bracket 15, and the connecting bracket 15 can be disposed on the front side or the rear side of the structural main body 1, or can be disposed on both the front side and the rear side. In this embodiment, the connection bracket 15 includes a front connection bracket 15a and a rear connection bracket 15b, which are used for connecting the cabin lock mounting beam and the cabin front upper beam 5 respectively. At the same time, first connection holes 150 are opened on the two connection brackets for fixing the components by means of fasteners such as bolts. In this way, both the upper front beam 5 of the cabin and the installation beam of the cabin lock in the cabin frame can be centrally fixed on the connecting bracket 15 .

At the same time, near the top, a radiator mounting bracket 16 is also provided on the structural body 1 for fixing the radiator. By arranging the connecting bracket 15 and/or the radiator mounting bracket 16 on the top of the structural main body 1, it is convenient to assemble the components such as the front upper beam 5, the cabin lock mounting beam, the radiator, etc. Making the front end impact energy absorbing structure of the vehicle body can provide a concentrated connection of multiple parts.

The above-mentioned connecting seat can be a forging piece or a casting piece, can be welded with a steel profile, and can also be an aluminum profile. Preferably, cast aluminum is used for integral casting; such a structure has the characteristics of mature construction technology and light weight, and the deformation and collapse performance of the energy-absorbing portion 11 is good, which is beneficial to the front-end collision energy-absorbing structure of the vehicle body. It can play a good role in buffering and energy absorption in the event of a collision.

The connecting seat of this embodiment realizes the secondary energy absorption buffer after the energy absorption of the front anti-collision beam 3 through the high collapse performance of the aluminum alloy under the condition of small offset collision. Flexible adjustment of energy absorption effect. In the entire skeleton structure of the nacelle, the connecting seat is connected from top to bottom, the upper part is connected to the front upper beam 5 of the nacelle, the nacelle lock installation beam and the radiator, and the lower part is connected to the front anti-collision beam energy-absorbing box 30 of the front anti-collision beam 3 and the front longitudinal beam 2 of the nacelle With the front subframe 4, the connection structure of the front part of the whole frame is compact, concentrated and simplified; the feature of high integration also makes the assembly process of the frame more streamlined.

Furthermore, the above-mentioned connecting seat is provided in the front-end collision energy absorbing structure of the vehicle body of the present embodiment, and the connecting seat is installed on the front end of the front side member 2 of the nacelle, and is connected with the front impact beam 3 of the vehicle. The energy-absorbing portion 11 is designed. When the front anti-collision beam 3 is impacted by a small offset from the side and front, after the impact force is transmitted to the structural body 1, the energy-absorbing portion 11 will collapse and deform to absorb part of the impact energy. The remaining impact force will be transmitted to the front longitudinal beam 2 of the cabin, so that the impact force transmitted by the front longitudinal beam 2 of the cabin to the cockpit will be weakened, which will help to improve the buffering and energy absorption of the front of the vehicle body when it suffers from a small offset collision. Effect.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the within the scope of protection of the present invention.

Claims (10)

1. A front-end collision energy-absorbing structure of a vehicle body, characterized in that: it comprises a front anti-collision beam (3) connected with the front ends of the front longitudinal beams (2) of the nacelle on both sides, and a front wheel house side beam ( 7) between the front cabin upper beam (5); wherein, The front anti-collision beam (3) has a projecting section (300) extending to the outside of the front longitudinal beam (2) of the nacelle; The front nacelle upper beam (5) is located behind and above the front anti-collision beam (3), and is arched toward the front of the vehicle body; A front shock absorber seat (9) is arranged on the inner side of the front wheel house side beam (7), and a front nacelle is arranged between the front nacelle upper beam (5) and the front shock absorber seat (9). Upper beam energy-absorbing box (50). 2. The front-end collision energy-absorbing structure of claim 1, wherein: Each end of the upper beam (5) of the front engine room is detachably connected to the front wheel house side beam (7) on the corresponding side; The front nacelle upper beam energy-absorbing box (50) is detachably connected between the front nacelle upper beam (5) and the front shock absorber seat (9); In the direction pointing to the front of the vehicle body, the upper beam energy-absorbing boxes (50) of the front nacelle on each side are inclined outwardly arranged. 3. The front-end collision energy-absorbing structure of claim 2, wherein: Each end of the front nacelle upper beam (5) is detachably connected to the front wheel house side beam (7) through the upper beam connecting plate (51); A connecting table (90) is provided on the side of the front shock absorber seat (9); One end of the upper beam energy-absorbing box (50) of the front nacelle is connected to the connecting platform (90); The other end of the upper beam energy-absorbing box (50) of the front engine room is connected to the upper beam (5) of the front engine room through a connecting plate (500). 4. The front-end collision energy-absorbing structure of claim 1, wherein: The upper beam energy-absorbing box (50) of the front nacelle is in a grid shape formed by interlacing and connecting a plurality of plate bodies (501). 5. The front-end collision energy-absorbing structure of claim 1, wherein: The upper beam (5) of the front engine room adopts a pipe beam; In the direction toward the rear of the vehicle body, both sides of the front nacelle upper cross member (5) connected with the front wheel house side member (7) are both arranged in a gradually rising trend. 6. The front-end collision energy-absorbing structure according to any one of claims 1 to 5, wherein: A connecting seat is respectively connected to the front end of each of the front longitudinal beams (2) of the nacelle; The front anti-collision beam (3) is connected with the front longitudinal beam (2) of the nacelle through the connecting seat; and, The lower part of the rear side of the connecting seat is provided with an energy absorbing part (11); The energy absorbing part (11) is located on the outer side of the front longitudinal beam (2) of the nacelle, and is arranged protruding toward the rear of the connecting seat; Along the length direction of the vehicle body, the energy absorbing portion (11) is located between the protruding section (300) and the upper beam energy absorbing box (50) of the front nacelle. 7. The front-end collision energy-absorbing structure of claim 6, wherein: Along the direction to the front longitudinal beam (2) of the nacelle, the protruding height of the energy absorbing portion (11) increases gradually. 8. The front-end collision energy-absorbing structure of claim 6, wherein: The connecting seat includes a structural body (1); The cabin front longitudinal beam (2) and the front anti-collision beam (3) are connected on both sides of the structural main body (1); One side of the energy absorbing portion (11) is fixedly connected to the front longitudinal beam (2) of the nacelle. 9. The front-end collision energy-absorbing structure of claim 8, wherein: The upper beam (5) of the front nacelle is connected to the top of the structural main body (1). 10. The front-end collision energy-absorbing structure of claim 6, wherein: The front anti-collision beam (3) is connected to the connecting seat through a front anti-collision beam energy-absorbing box (30).

Images