CN201165250Y - The lower frame structure of the car body - Google Patents

Abstract

The lower frame structure of the automobile body, including a pair of front longitudinal beams (1), front floor longitudinal beams (2), rear parts of the front longitudinal beams (3) and door sill connecting plates (5), the rear parts of the front longitudinal beams are connected to the front longitudinal beams Between the beam and the longitudinal beam of the front floor, each door sill connecting plate is respectively connected to the outer side of the rear part of a front longitudinal beam, and a crossbeam (6) is connected between the rear parts of the two front longitudinal beams, which is characterized in that each connected A reinforcing plate (4) is connected between the rear part of the front longitudinal beam and the door sill connecting plate. The utility model has a reasonable and reliable structure. When it is subjected to a frontal collision, it can ensure that the energy-absorbing area of the front longitudinal beam is fully deformed, thereby absorbing the energy generated by the frontal collision to the greatest extent, so as to effectively reduce the deformation of the cab and reduce the The deceleration of the driver and passengers reduces the damage to the driver and passengers.

Description

The lower frame structure of the car body

technical field

The utility model relates to a lower frame structure of an automobile body.

Background technique

With the rapid development of the automobile industry and technology, the humanization requirements for automobiles are also getting higher and higher, especially the protection of drivers and passengers is getting more and more attention. At present, the generally accepted idea of the safety performance of automobile structure design is: in the event of a front collision accident, the personal safety of the occupants in the vehicle should be protected to the greatest extent, and the effective living space of the occupants in the vehicle should be ensured. Therefore, the structural design of the vehicle is required to have a good impact energy absorption effect of the front cabin, that is, to minimize the deformation of the cab during the collision. After searching, the Chinese Patent Gazette discloses some vehicle body structures, which have a certain effect on the protection of the driver and passengers, but still fail to solve the impact energy absorption effect of the front cabin ideally. The main problem is that the current Some underbody frame structures are generally welded by sheet metal stamping parts. For example, an existing underbody frame structure includes a pair of front longitudinal beams, front floor longitudinal beams, front longitudinal beam rears and The door sill connecting plate, the rear part of the front longitudinal beam is connected to the front longitudinal beam and the front floor longitudinal beam. In the above-mentioned structure, the rear part of the pair of front longitudinal beams is in the shape of "Z". In the process of frontal collision, the "Z"-shaped structural area is very prone to collapse, which will lead to serious deformation of the cab and threaten the survival of drivers and passengers. Moreover, due to the collapse of the structure here, the energy-absorbing area of the front side beam structure cannot fully absorb the energy generated by the frontal collision, thus causing the driver and passengers to suffer a huge impact during the collision.

Utility model content

The purpose of this utility model is to solve the problem that the "Z" shaped structure area at the rear of the front longitudinal beam is very prone to collapsing, and to provide a car body lower frame structure, which can effectively Distributes the impact force and transmits the impact force to the car frame.

In order to achieve the above object, the utility model adopts the following scheme: the lower frame structure of the automobile body includes a pair of front longitudinal beams, front floor longitudinal beams, front longitudinal beam rear parts and threshold connecting plates, and front longitudinal beam rear parts Connected between the front longitudinal beam and the front floor longitudinal beam, each door sill connecting plate is respectively connected to the outer side of the rear part of a front longitudinal beam, and a cross beam is connected between the rear parts of the two front longitudinal beams, and each connected front longitudinal beam A reinforcing plate is connected between the rear part of the beam and the door sill connecting plate.

The utility model has the advantages that: by connecting a reinforcing plate between the rear part of each connected front longitudinal beam and the sill connecting plate, in the event of a frontal collision, the resulting impact force on the cab can be supported by the reinforcing plate, Disperse the impact force transmitted from the front longitudinal beam to the front floor longitudinal beam, and transmit the energy generated by the impact to the body frame through the door sill connection plate, so that the energy-absorbing area of the front longitudinal beam is fully deformed, thereby absorbing the impact generated by the frontal collision to the maximum extent. Energy, to effectively reduce the deformation of the cab and reduce the deceleration of the driver and passengers, and reduce the damage to the driver and passengers. The utility model is reasonable and reliable in structure, and compared with the prior art, the safety is greatly improved.

Description of drawings

Fig. 1 is the top view of the utility model embodiment;

Fig. 2 is a perspective view of the embodiment of the utility model.

Detailed ways

Below in conjunction with embodiment and accompanying drawing further illustrate the utility model.

See Figure 1 and Figure 2:

The lower frame structure of the existing automobile body includes a pair of front longitudinal beams 1, front floor longitudinal beams 2, Z-shaped front longitudinal beam rear parts 3 and sill connecting plates 5, and the front longitudinal beam rear parts 3 are connected to the front longitudinal beams. 1 and the longitudinal beam 2 of the front floor, and a crossbeam 6 is connected between the rear parts 3 of the two front longitudinal beams. When the above-mentioned frame structure is subjected to a frontal collision on the front side member 1, the rear part 3 of the Z-shaped front side member is very prone to collapsing. Due to the collapse of the structure here, the energy-absorbing area of the front side member structure cannot fully absorb the impact caused by the frontal collision. energy, causing the driver and passengers to receive a huge impact during the collision.

The lower frame structure of the automobile body provided by the utility model is based on the lower frame structure of the existing automobile body mentioned above, and a reinforcing plate 4 is connected between each connected front longitudinal beam rear portion 3 and the door sill connecting plate 5 , The reinforcing plate 4 is a frame structure formed by bending a plate. By means of welding, the bottom of the reinforcing plate 4 is connected to the upper end of the front longitudinal beam rear portion 3, and the front and rear ends of the reinforcing plate 4 are respectively connected to the front ends of the crossbeam 6 and the door sill connecting plate 5. In addition, the outline of the reinforcing plate 4 is approximately triangular, and the contours of the joints between the reinforcing plate 4 and the rear part of the front longitudinal beam 3 , the cross beam 6 and the door sill connecting plate 5 coincide with each other.

The frame structure shown in Figure 2, when the front side beam 1 is subjected to a frontal collision, as shown by the arrow in the figure, the impact force on the cab generated by the reinforcement plate 4 can be supported, and a part of the collision force can be absorbed by the reinforcement plate 4. It is transmitted to the door sill connecting plate 5 to disperse the collision force transmitted from the front side beam 1 to the front floor side beam 2, and the energy generated by the impact is transmitted to the body frame through the door sill connecting plate 5, thereby ensuring that the energy absorption area of the front side beam 1 occurs It fully deforms and absorbs the energy generated by the frontal collision to the maximum, so as to effectively reduce the deformation of the cab and the deceleration of the driver and passengers, and reduce the damage to the drivers and passengers.

Claims (3)

1. A lower frame structure of an automobile body, comprising a pair of front side beams (1), front floor side beams (2), front side beam rear parts (3) and sill connecting plates (5), front side beam rear parts (3) Connected between the front longitudinal beam (1) and the front floor longitudinal beam (2), each door sill connecting plate (5) is respectively connected to the outer side of a front longitudinal beam rear part (3), between the two front longitudinal beams Crossbeams (6) are connected between the rear parts (3), and are characterized in that a reinforcing plate (4) is connected between each connected front longitudinal beam rear part (3) and the door sill connecting plate (5). 2. The lower frame structure of the automobile body according to claim 1, characterized in that: the reinforcement plate (4) is a frame structure formed by bending plates, and the bottom of the reinforcement plate (4) is connected to the rear of the front longitudinal beam. The upper end of the part (3) is connected, and the front end and the rear end of the reinforcing plate (4) are connected with the front ends of the crossbeam (6) and the threshold connecting plate (5) respectively. 3. The lower frame structure of the automobile body according to claim 1, characterized in that: the reinforcement plate (4) has a triangular shape, and the reinforcement plate (4) is connected to the rear part of the front longitudinal beam (3) and the cross beam (6) The contours of the joints between the door sill connecting plate (5) match each other.

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