Connecting structure of automobile aluminum alloy front anti-collision beam and energy absorption box

Abstract

A connecting structure of an aluminum alloy front anti-collision beam and an energy absorption box of an automobile comprises the aluminum alloy front anti-collision beam, the energy absorption box and a vertical plate, the front end of the energy absorption box is connected with the rear end of the front anti-collision beam, and the rear end of the energy absorption box is connected with the vertical plate. The upper end and the lower end of the connecting face of the energy absorption box and the front anti-collision beam are each provided with a connecting device used for connecting the energy absorption box and the front anti-collision beam, each connecting device comprises an upper connecting plate, a middle connecting plate and a lower connecting plate which are integrally formed, the upper connecting plates are connected with the middle connecting plates, the middle connecting plates extend downwards to be connected with the lower connecting plates, and the lower connecting plates are connected with the upper connecting plates. The upper connecting plate is fixedly connected with the end face of the front anti-collision beam, the lower connecting plate is fixedly connected with the end face of the energy absorption box, the left end and the right end of the vertical plate are respectively provided with a bend extending towards the front anti-collision beam, and the energy absorption box is welded to the plane of the vertical plate. The connecting structure can solve the problem that a welding seam formed by welding the aluminum alloy front collision beam and the energy absorption box is prone to cracking in a whole vehicle collision and three-point bending test.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and particularly relates to a connecting structure between an aluminum alloy front anti-collision beam and an energy-absorbing box of an automobile. Background Art

[0002] With the development of the automobile industry, vehicle lightweighting has become one of the important means to improve fuel economy, reduce emissions and enhance vehicle performance. As a lightweight material, aluminum alloy has a lower density than the traditional steel materials used. Therefore, the use of aluminum alloy in automobile manufacturing can significantly reduce the overall weight of the vehicle, thereby improving the fuel economy and performance of the vehicle. In addition, aluminum alloy materials also perform well in terms of collision safety performance, and can effectively absorb the energy during a collision to protect the safety of passengers.

[0003] In the application of automobile front anti-collision beams, the use proportion of aluminum alloy is gradually increasing. Especially in high-end models, the application of aluminum alloy anti-collision beams has become a trend. Market research data shows that the average mass of aluminum alloy anti-collision beams is lighter than that of steel anti-collision beams. At the same time, in the comparative analysis of collision simulation, aluminum alloy anti-collision beams perform better in terms of energy absorption, proving their effectiveness in improving vehicle safety performance.

[0004] Currently, the aluminum alloy front collision crossbeam and the energy-absorbing box of an automobile are connected together by welding, but the weld strength is relatively low, usually only about half of the tensile strength of the profile body. It is easy to crack during the whole vehicle collision process, resulting in the impact force not being effectively absorbed and weakened by the energy-absorbing box, thus affecting the safety performance.

[0005] Therefore, there is an urgent need for a connecting structure between an aluminum alloy anti-collision beam and an energy-absorbing box that is not easy to crack. Summary of the Invention

[0006] The purpose of the utility model is to provide a connecting structure between an aluminum alloy front anti-collision beam and an energy-absorbing box of an automobile in view of the corresponding deficiencies of the prior art. This connecting structure can solve the problem that the weld between the aluminum alloy front collision beam and the energy-absorbing box is easy to crack during the whole vehicle collision and three-point bending test.

[0007] The object of the present utility model is achieved by the following solution: A connection structure between an aluminum alloy front anti-collision beam and an energy absorption box of an automobile, including an aluminum alloy front anti-collision beam, an energy absorption box and a vertical plate. The front end of the energy absorption box is connected to the rear end of the front anti-collision beam, and the rear end of the energy absorption box is connected to the vertical plate. At the upper and lower ends of the connection surface between the energy absorption box and the front anti-collision beam, a connection device for connecting the energy absorption box and the front anti-collision beam is provided. The connection device includes an integrally formed upper connection plate, a middle connection plate and a lower connection plate. The upper connection plate is connected to the middle connection plate, and the middle connection plate extends downward to connect the lower connection plate. The upper connection plate is fixedly connected to the end face of the front anti-collision beam, and the lower connection plate is fixedly connected to the end face of the energy absorption box. At the left and right ends of the vertical plate, bends extending towards the front anti-collision beam are respectively provided, and the plane of the energy absorption box is welded to the vertical plate.

[0008] The upper connection plate is fixedly connected to the end face of the front anti-collision beam through a rivet nut and a bolt, and the lower connection plate is fixedly connected to the end face of the energy absorption box through a rivet nut and a bolt.

[0009] The energy absorption box and the vertical plate are made of aluminum alloy material.

[0010] The rivet nuts and bolts of the connection device and the fixed connection device are made of steel material.

[0011] The front anti-collision beam and the energy absorption box are connected by welding, and the energy absorption box and the vertical plate are connected by welding.

[0012] Two cross beams penetrating the front anti-collision beam are arranged inside the front anti-collision beam, and one cross beam penetrating the energy absorption box is arranged inside the energy absorption box.

[0013] A plurality of weight reduction holes are arranged on the connection surface between the vertical plate and the energy absorption box, and a plurality of mounting holes are respectively arranged at the upper and lower ends of the vertical plate.

[0014] The advantages of the present utility model are as follows: This connection structure can solve the problem that the welds of the aluminum alloy front collision beam and the energy absorption box are prone to cracking in the vehicle collision and three-point bending tests. This connection device is symmetrically arranged on the upper and lower surfaces of the front collision cross beam, and the operation is simple. In the vehicle collision and three-point bending tests, the force is transmitted to the bolt through the front collision cross beam. Since the bolt is made of steel material, it can withstand a large shear deformation force, thereby improving the connection strength of the entire structure. The bends provided on both sides of the vertical plate can withstand a certain Y-direction load during the vehicle collision process, improving the collision stability. This connection structure can effectively improve the connection strength and reliability at the weld without changing the welding process by adding simple connection components, enabling it to meet the safety collision performance while achieving lightweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present utility model;

[0016] Figure 2 This is the side view of the utility model;

[0017] Figure 3 This is the top view of the utility model. Detailed implementation manners

[0018] As Figures 1 to 3 shown, a connection structure between an aluminum alloy front anti-collision beam and an energy absorption box of an automobile includes an aluminum alloy front anti-collision beam 1, an energy absorption box 3 and a vertical plate 4. The front end of the energy absorption box 3 is connected to the rear end of the front anti-collision beam 1, and the rear end of the energy absorption box 3 is connected to the vertical plate 4. The front anti-collision beam 1 and the energy absorption box 3 are welded all around by MIG welding, and the energy absorption box 3 and the vertical plate 4 are welded all around by MIG welding. At the upper and lower ends of the connection surface between the energy absorption box 3 and the front anti-collision beam 1, a connection device 2 for connecting the energy absorption box 3 and the front anti-collision beam 1 is provided. The connection device 2 includes an integrally formed upper connection plate 2-1, an intermediate connection plate 2-2 and a lower connection plate 2-3. The upper connection plate 2-1 is connected to the intermediate connection plate 2-2, and the intermediate connection plate 2-2 extends downward to connect the lower connection plate 2-3. The upper connection plate 2-1 is fixedly connected to the end face of the front anti-collision beam 1, and the lower connection plate 2-3 is fixedly connected to the end face of the energy absorption box 3. The upper connection plate 2-1 is fixedly connected to the end face of the front anti-collision beam 1 through a blind rivet nut 7 and a bolt 6, and the lower connection plate 2-3 is fixedly connected to the end face of the energy absorption box 3 through a blind rivet nut 7 and a bolt 6. At the left and right ends of the vertical plate 4, bends 5 extending towards the front anti-collision beam 1 are respectively provided, and the energy absorption box 3 and the vertical plate 4 are welded on the plane. The energy absorption box 3 and the vertical plate 4 are made of aluminum alloy material. The connection device 2 and the blind rivet nut 7 and bolt 6 for fixedly connecting the connection device 2 are made of steel material. Inside the front anti-collision beam 1, two cross beams penetrating through the front anti-collision beam 1 are provided, so that the cross section of the front anti-collision beam 1 is in a square frame structure, and inside the energy absorption box 3, one cross beam penetrating through the energy absorption box 3 is provided, so that the cross section of the energy absorption box 3 is in a rectangular frame structure. On the connection surface between the vertical plate 4 and the energy absorption box 3, a plurality of weight-reducing holes 4-2 are provided, and a plurality of mounting holes 4-1 are respectively provided at the upper and lower ends of the vertical plate 4.

[0019] To achieve lightweight, the front collision cross member, energy absorption box, and vertical plate of the main body structure are all made of aluminum alloy extruded profiles. The connecting device is made of steel. Full circumferential welding is carried out between the profiles using MIG welding to form welds. The connecting device is connected to the front collision cross member and the energy absorption box using standard rivet nuts and bolts. The use of steel parts is minimized in the whole structure, and at the same time, the assembly is made simple. The vertical plate is no longer made into the usual flat plate structure, but the two sides are bent. This structure can withstand a certain Y-direction load during the vehicle collision process, improving the collision stability. Full circumferential welding is carried out between the front collision cross member and the energy absorption box, and between the energy absorption box and the vertical plate using 5-series welding wires, which can ensure that the weld strength reaches more than 60% of the tensile strength of the base material.

[0020] The connecting device is connected to the front collision cross member and the energy absorption box through standard parts. First, pre-open holes on the front collision cross member and the energy absorption box, install rivet nuts, make the flange plane of the rivet nut fit with the connecting block, and screw in the bolts, then the assembly is completed. This connecting device is symmetrically arranged on the upper and lower two surfaces of the front collision cross member, and the operation is simple. During the vehicle collision and three-point bending tests, the force is transmitted from the front collision cross member to the bolts. Since the bolts are made of steel material, they can withstand a large shear deformation force, thus improving the connection strength of the whole structure. This structure has been verified in the three-point bending test, and can increase the maximum bearing capacity of the front collision cross member assembly by about 30% without the weld cracking.

[0021] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Those skilled in the art, without departing from the spirit of the present utility model, any modifications made to the present utility model fall within the protection scope of the present utility model.

Claims

1. A connecting structure between an aluminum alloy front anti-collision beam and an energy-absorbing box of an automobile, comprising an aluminum alloy front anti-collision beam (1), an energy-absorbing box (3) and a vertical plate (4). The front end of the energy-absorbing box (3) is connected to the rear end of the front anti-collision beam (1), and the rear end of the energy-absorbing box (3) is connected to the vertical plate (4), characterized in that: At the upper and lower ends of the connection surface between the energy-absorbing box (3) and the front bumper beam (1), a connection device (2) for connecting the energy-absorbing box (3) and the front bumper beam (1) is provided. The connection device (2) includes an integrally formed upper connection plate (2-1), an intermediate connection plate (2-2), and a lower connection plate (2-3). The upper connection plate (2-1) is connected to the intermediate connection plate (2-2), and the intermediate connection plate (2-2) extends downward to connect the lower connection plate (2-3). The upper connection plate (2-1) is fixedly connected to the end face of the front bumper beam (1), and the lower connection plate (2-3) is fixedly connected to the end face of the energy-absorbing box (3). At the left and right ends of the vertical plate (4), bends (5) extending towards the front bumper beam (1) are respectively provided. The energy-absorbing box (3) is welded to the plane of the vertical plate (4).

2. The connection structure between the aluminum alloy front anti-collision beam and the energy absorption box of an automobile according to claim 1, characterized in that: The upper connection plate (2-1) is fixedly connected to the end face of the front bumper beam (1) through a rivet nut (7) and a bolt (6), and the lower connection plate (2-3) is fixedly connected to the end face of the energy-absorbing box (3) through a rivet nut (7) and a bolt (6).

3. The connection structure of the automotive aluminum alloy front anti-collision beam and the energy absorption box according to claim 1, characterized in that: The energy-absorbing box (3) and the vertical plate (4) are made of aluminum alloy material.

4. The connection structure between the aluminum alloy front anti-collision beam and the energy absorption box of an automobile according to claim 1, characterized in that: The connection device (2) and the rivet nut (7) and bolt (6) for fixedly connecting the connection device (2) are made of steel material.

5. The connection structure of the aluminum alloy front anti-collision beam and the energy absorption box of the vehicle according to claim 1, characterized in that: The front bumper beam (1) and the energy-absorbing box (3) are connected by welding, and the energy-absorbing box (3) and the vertical plate (4) are connected by welding.

6. The connecting structure of the aluminum alloy front anti-collision beam and the energy-absorbing box of the automobile according to claim 1, wherein: Two cross beams penetrating the front bumper beam (1) are provided inside the front bumper beam (1), and one cross beam penetrating the energy-absorbing box (3) is provided inside the energy-absorbing box (3).

7. The connecting structure of the aluminum alloy front anti-collision beam and the energy-absorbing box of an automobile according to claim 1, characterized in that: A plurality of weight-reducing holes (4-2) are provided on the connection surface between the vertical plate (4) and the energy-absorbing box (3), and a plurality of mounting holes (4-1) are respectively provided at the upper and lower ends of the vertical plate (4).

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