CN214492793U

CN214492793U - Improve compatible front end automobile body structure of automobile body structure

Info

Publication number: CN214492793U
Application number: CN202120250629.7U
Authority: CN
Inventors: 光玲玲; 武小海; 陈世荣
Original assignee: Zhejiang Zero Run Technology Co Ltd
Current assignee: Zhejiang Leapmotor Technology Co Ltd; Zhejiang Zero Run Technology Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-10-26
Anticipated expiration: 2031-01-28

Abstract

The utility model discloses an improve compatible front end automobile body structure of body construction, including longeron, set up at the front anticollision roof beam of longeron front end, sub vehicle frame and set up the front beam of sub vehicle frame front end, be equipped with the energy-absorbing box between longeron and the front anticollision roof beam, be equipped with sub vehicle frame energy-absorbing box between sub vehicle frame and the front beam, the front beam is located the below of front anticollision roof beam and the front beam is located same vertical curved surface with front anticollision roof beam, front anticollision roof beam and front beam fixed connection form confined annular structure. The utility model discloses increased a front beam at sub vehicle frame energy-absorbing box front end, both ends are passed through the connecting plate and are welded together with preceding crashproof roof beam, form an annular structure, have increased the contact surface with the barrier, can more effectively guarantee that the barrier is evenly deformed, avoid puncturing; the front end of the auxiliary frame energy absorption box is additionally provided with the front cross beam, which is equivalent to the fact that a transmission path from the front cross beam to a front frame is additionally arranged, so that collision energy can be better dispersed and absorbed, the acceleration of a barrier is reduced, and OLC is reduced, so that penalty is reduced.

Description

Improve compatible front end automobile body structure of automobile body structure

Technical Field

The utility model belongs to the technical field of the auto-parts technique and specifically relates to an improve compatible front end automobile body structure of automobile body structure.

Background

In the 2021 version C-NCAP (China New vehicle evaluation protocol) evaluation protocol, the vehicle safety performance is evaluated by adopting a new MPDB (front 50% overlapping moving progressive deformation barrier collision test) front collision evaluation working condition to replace the existing ODB (front 40% overlapping deformable barrier collision test) working condition. Compared with ODB, the MPBD working condition not only evaluates the injury of a dummy, but also increases the structural compatibility evaluation of a test vehicle, namely, considers the protection of the opposite vehicle. The compatibility is evaluated by considering SD (uniformity of deformation of the barrier), OLC (passenger load factor), breakdown and other penalties. In order to meet the requirement that a vehicle body structure has better compatibility in a new MPDB working condition, a general automobile host factory can develop a new vehicle type by methods of reducing the weight of the vehicle, increasing the Z-direction height of a front anti-collision beam, increasing the overlapping amount of the front anti-collision beam and a barrier, reducing SD and the like. The adoption of novel materials inevitably increases the cost; with the increase of the endurance mileage, the battery pack of the electric automobile is larger and larger, the weight of the automobile is generally about 2 tons and is far larger than the weight of the barrier, the weight is reduced by reducing the thickness of the material on the basis of not influencing the safety of the automobile body structure, the large-scale reduction of the weight is difficult to realize, and the influence of the reduced weight on the compatibility penalty of the automobile body is negligible. The reasonable design principle of the front end structure is as follows: and dispersing and absorbing collision energy, and constructing a front-end vertical defense wall to cover the MPDB evaluation area. The simplest and simplest scheme is that the Z-direction height of the front anti-collision beam is increased, the overlapping degree of the vehicle body and the collision barrier is increased, the vehicle body compatibility penalty can be reduced, but the height which can be increased by the front anti-collision beam is limited under the influence of spatial arrangement; and the structure of two traditional longerons plus an anticollision roof beam is difficult to satisfy compatibility evaluation requirement, and the vertical transmission structure that often is too strong often can cause the barrier to puncture, and compatibility improvement effect is general.

For example, a "front cross member assembly of an automobile" disclosed in chinese patent document, publication No. CN207644331U, includes a body including an aluminum alloy front cross member including a mounting portion and a positioning portion, and a crash box mounted between the positioning portion and the aluminum alloy front cross member. Only a single longitudinal beam is arranged, the barrier breakdown is often caused by an excessively strong longitudinal transmission structure, and the compatibility improvement effect is general.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome prior art's two longerons and the structure of an anticollision roof beam and hardly satisfy compatible aassessment requirement, the vertical transmission structure of mistake often can cause the barrier to puncture the scheduling problem, an improve the compatible front end automobile body structure of automobile body structure is provided, propose at sub vehicle frame energy-absorbing box front end increase a front beam, the overlapping amount of automobile body and barrier has not only been increased, it can disperse to have increased a transmission route simultaneously, some collision energy of energy-absorbing, can effectually promote the compatibility of automobile body.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an improve compatible front end automobile body structure of body construction, includes the longeron, sets up at the preceding crashproof roof beam of longeron front end, sub vehicle frame and sets up the front beam of sub vehicle frame front end, be equipped with the energy-absorbing box between longeron and the preceding crashproof roof beam, be equipped with sub vehicle frame energy-absorbing box between sub vehicle frame and the front beam, the front beam is located the below of preceding crashproof roof beam and front beam are located same vertical curved surface, preceding crashproof roof beam and front beam fixed connection form confined annular structure.

In an MPDB collision test, a front anti-collision beam and a front cross beam can cover an evaluation area of a barrier, the front anti-collision beam and the front cross beam are positioned in the same curved surface, so that the front anti-collision beam and the front cross beam are simultaneously contacted with the barrier, two transmission paths are formed by the longitudinal beam, the front anti-collision beam, the auxiliary frame and the front cross beam to disperse collision capacity, more energy is absorbed through deformation of structures such as an energy absorption box, the longitudinal beam, the auxiliary frame and the like, and the acceleration of an MPDB trolley is reduced, so that the penalty of OLC (the load factor of passengers is in direct proportion to the acceleration of the barrier in the X direction, and the larger the OLC is, the more the penalty is) is reduced; in addition, preceding crashproof roof beam contacts with the barrier simultaneously with sub vehicle frame front beam, has increased the contact surface and can guarantee that the barrier is even to be out of shape, avoids puncturing to reduce and penalize the mark.

Preferably, the cross sections of the front cross beam and the front anti-collision beam are in a shape of Chinese character 'ri'. The front cross beam is of a structure in a shape like a Chinese character 'ri', so that the front cross beam has certain bending strength, can be backwards extruded together with the anti-collision beam during collision, and can be simultaneously crushed by the upper energy-absorbing box and the lower energy-absorbing box.

Preferably, a connecting plate is fixedly connected between two ends of the front anti-collision beam and two ends of the front cross beam, and the front anti-collision beam is fixedly connected with the front cross beam through the connecting plate. The front anti-collision beam and the front cross beam are fixedly connected through the two connecting plates to form a square annular structure.

Preferably, the horizontal plane of the front anti-collision beam is parallel to the horizontal plane of the front cross beam.

Preferably, the height of the front beam is greater than the height of the sub-frame crash box. The better front cross beam of the collision force is guaranteed to be transmitted to the auxiliary frame energy absorption box and the auxiliary frame.

Preferably, the length of the front fender beam is greater than that of the front cross beam.

Preferably, the connecting plate is welded with the front anti-collision beam and the front cross beam respectively.

Therefore, the utility model discloses following beneficial effect has: (1) the front end of the auxiliary frame energy absorption box is additionally provided with a front cross beam, and two ends of the front cross beam are welded with the front anti-collision beam through the connecting plate to form an annular structure, so that the contact surface with the barrier is increased, the barrier can be more effectively ensured to be uniformly deformed, the breakdown is avoided, and the structural compatibility of a vehicle body is improved; (2) the front end of the auxiliary frame energy absorption box is additionally provided with a front cross beam, which is equivalent to the fact that a transmission path from the front cross beam to a front frame is additionally arranged, so that collision energy can be better dispersed and absorbed, the acceleration of a barrier is reduced, and OLC is reduced, so that penalty is reduced; in addition, the acceleration of the collision test vehicle can be reduced, and the safety of passengers in the vehicle can be better kept.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the front anti-collision device comprises a front anti-collision beam 2, a front cross beam 3, an energy absorption box 4, a longitudinal beam 5, an auxiliary frame energy absorption box 6, a connecting plate 7 and an auxiliary frame.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1, the utility model relates to a front-end vehicle body structure for improving the compatibility of the vehicle body structure, which comprises a longitudinal beam 4, a front anti-collision beam 1 arranged at the front end of the longitudinal beam, an auxiliary frame 7 and a front cross beam 2 arranged at the front end of the auxiliary frame, wherein the cross sections of the front cross beam and the front anti-collision beam are in a shape of Chinese character 'ri', an energy-absorbing box 3 is arranged between the longitudinal beam and the front anti-collision beam, the energy-absorbing box is fixedly connected with the front ends of the two longitudinal beams and fixedly connected with the front anti-collision beam, an auxiliary frame energy-absorbing box 5 is arranged between the auxiliary frame and the front cross beam, the auxiliary frame energy-absorbing box is fixedly connected with the front end of the auxiliary frame, namely the two ends far away from the vehicle body and fixedly connected with the front cross beam, the front cross beam is arranged below the front anti-collision beam, the front cross beam and the front anti-collision beam are arranged in the same vertical curved surface, the shape of the front cross beam is coincident with the vertical curved surface of the front anti-collision beam, the front anti-collision beam is fixedly connected with the front cross beam to form a closed annular structure.

And a connecting plate 6 is fixedly connected between the two ends of the front anti-collision beam and the two ends of the front cross beam, and the front anti-collision beam and the front cross beam are fixedly connected through the connecting plate. The front anti-collision beam and the front cross beam are welded and fixed through the two connecting plates to form a square annular structure.

The horizontal plane of the front anti-collision beam is parallel to the horizontal plane of the front cross beam; the height of the front beam is greater than that of the auxiliary frame energy absorption box; the length of the front protection beam is greater than that of the front cross beam; the connecting plate is respectively welded with the front anti-collision beam and the front cross beam.

Claims

1. The utility model provides an improve compatible front end automobile body structure of body structure, characterized by, including longeron, set up at the preceding crashproof roof beam of longeron front end, sub vehicle frame and set up the front beam of sub vehicle frame front end, be equipped with the energy-absorbing box between longeron and the preceding crashproof roof beam, be equipped with sub vehicle frame energy-absorbing box between sub vehicle frame and the front beam, the front beam is located the below of preceding crashproof roof beam and the front beam is located same vertical curved surface with preceding crashproof roof beam, preceding crashproof roof beam and front beam fixed connection form confined annular structure.

2. The front end vehicle body structure for improving compatibility of a vehicle body structure of claim 1, wherein the cross-sectional shapes of the front cross member and the front impact beam are both a Chinese character 'ri'.

3. The front-end vehicle body structure for improving the compatibility of the vehicle body structure as claimed in claim 1, wherein connecting plates are fixedly connected between both ends of the front impact beam and both ends of the front cross beam, and the front impact beam and the front cross beam are fixedly connected through the connecting plates.

4. The front end vehicle body structure for improving compatibility of a vehicle body structure of claim 1, wherein a horizontal plane of the front impact beam is parallel to a horizontal plane of the front cross beam.

5. The front end vehicle body structure for improving compatibility of a vehicle body structure of claim 1, wherein a height of said front cross member is greater than a height of said sub-frame crash boxes.

6. The front end vehicle body structure for improving compatibility of a vehicle body structure of claim 1, wherein a length of the front fender beam is greater than a length of the front cross member.

7. The front-end vehicle body structure for improving the compatibility of the vehicle body structure as claimed in any one of claims 1 to 6, wherein the connecting plate is welded to the front impact beam and the front cross beam, respectively.