Aluminum alloy automobile front anti-collision assembly for improving small offset collision protection performance

Abstract

An aluminum alloy automobile front anti-collision assembly for improving the anti-collision performance of small offset collisions includes an anti-collision beam assembly, a longitudinal beam, an upper side beam and a longitudinal beam front end mounting plate. The anti-collision beam assembly includes a cross beam and a main and auxiliary energy absorption box. The front end surface of the longitudinal beam front end mounting plate is connected to the main and auxiliary energy absorption boxes, and the rear end of the beam front end mounting plate is connected to the longitudinal beam and the upper side beam. The longitudinal beam front end mounting plate connects the main and auxiliary energy absorption boxes, the longitudinal beam and the upper side beam into one. On the one hand, the invention can ensure that the barrier can be blocked during a small offset collision and ensure the normal deformation of the longitudinal beam; on the other hand, the aluminum alloy longitudinal beam section and the front and rear end mounting structures are proposed to ensure that the longitudinal beam is more uniformly crushed and deformed, and the cross-sectional force fluctuation is more stable.

Description

Technical Field

[0001] The invention relates to an automobile safety device, in particular to an aluminum alloy automobile front anti-collision assembly which improves the small offset collision anti-collision performance. Background Art

[0002] Frontal collision accidents have brought huge losses to society. Among the frontal collisions of cars with different overlap rates, the frontal collision with a small overlap rate (frontal collision with an overlap rate of 25%) is an accident form with a high incidence rate and a high death and injury rate. When designing cars, most car manufacturers only focus on meeting the requirements of the collision test of 40% overlap rate and 100% overlap rate between the front of the car and the barrier in laws and regulations, and do not pay enough attention to the small overlap frontal collision. With the formulation of small offset collision regulations, new requirements and challenges have been put forward for automobile structural design. On the other hand, with the increasingly stringent requirements for automobile energy conservation and emission reduction, automobile lightweighting work has been widely carried out, among which lightweight materials represented by aluminum alloys are increasingly widely used in body structures. For the small offset collision regulations (25% coverage 64km / h frontal rigid barrier collision), the main problems of the existing technology are: 1. The energy absorption box is less crushed, the longitudinal beam is basically not subjected to force transmission, the rigid barrier will directly hit the A-pillar, the passenger compartment is seriously deformed, and the possibility of occupant injury is greatly increased. 2) The longitudinal beam is the main energy-absorbing safety component in a frontal collision of a car. The front end of a traditional steel longitudinal beam is crushed to absorb energy, the middle part of the longitudinal beam is a rigid area and basically does not deform, and the rear end of the longitudinal beam bends to absorb energy and deform. The aluminum alloy longitudinal beam mainly absorbs energy by crushing at the front end. Therefore, the average cross-sectional force at the front end of the longitudinal beam is higher, but the cross-sectional force fluctuates too much, and the acceleration at the moment of collision fluctuates too much, which can easily cause secondary injuries to the occupants. Summary of the invention

[0003] The purpose of the present invention is to overcome the drawbacks of the prior art and provide an aluminum alloy automobile front anti-collision assembly that can effectively block barriers during small offset collisions, ensure uniform crushing and deformation of longitudinal beams, and thus improve the anti-collision performance of small offset collisions.

[0004] The problem described in the present invention is achieved by the following technical solution:

[0005] The invention discloses an aluminum alloy automobile front anti-collision assembly for improving the anti-collision performance of small offset collisions, comprising an anti-collision beam assembly, a longitudinal beam, an upper side beam, and a longitudinal beam front end mounting plate. The anti-collision beam assembly comprises a cross beam and an energy absorption box, the energy absorption box is symmetrically arranged relative to the cross beam center, the front end surface of the longitudinal beam front end mounting plate is connected to the energy absorption box, the rear end surface of the longitudinal beam front end mounting plate is connected to the longitudinal beam and the upper side beam, and the longitudinal beam front end mounting plate connects the main and auxiliary energy absorption boxes, the longitudinal beam and the upper side beam into one.

[0006] The above-mentioned aluminum alloy automobile front anti-collision assembly with improved small offset collision protection performance, the energy absorption box is composed of a main energy absorption box and an auxiliary energy absorption box, the auxiliary energy absorption box is located on the outside of the main energy absorption box; the front end mounting plate of the longitudinal beam is a rectangular plate with a frame, and the front end surface of the front end mounting plate of the longitudinal beam is provided with a main energy absorption box mounting position and an auxiliary energy absorption box mounting position side by side from the inside to the outside; the rear end surface of the front end mounting plate of the longitudinal beam is provided with a longitudinal beam mounting position, a reinforcement plate and an upper side beam mounting position side by side from the inside to the outside, the longitudinal beam mounting position is provided with four longitudinal beam mounting blocks connected to the four sides of the longitudinal beam, the upper side beam mounting position is provided with three upper side beam mounting blocks connected to the front, rear and outer sides of the upper side beam, and a reinforcement plate support rib is provided on the side of the reinforcement plate close to the upper side beam mounting position.

[0007] The above-mentioned aluminum alloy automobile front anti-collision assembly with improved small offset collision protection performance, the truncated outer wall of the longitudinal beam is a regular polygon, a longitudinal beam truncated closed area and several longitudinal beam connecting ribs are distributed in the polygon, the longitudinal beam truncated closed area is located at the center of the polygon, each longitudinal beam connecting rib connects the longitudinal beam truncated closed area with the outer wall, and the longitudinal beam truncated closed area and the longitudinal beam connecting ribs divide the longitudinal beam into a multi-cavity structure.

[0008] The aluminum alloy automobile front anti-collision assembly with improved small offset collision protection performance has at least one longitudinal beam collapse rib distributed along the y direction at the front of the longitudinal beam, guide ribs are respectively arranged on the upper and lower surfaces of the rear of the longitudinal beam, and a longitudinal beam rear mounting seat is arranged at the rear end of the longitudinal beam.

[0009] The above-mentioned aluminum alloy automobile front anti-collision assembly with improved small offset collision protection performance has a main energy absorption box corresponding to the position of the longitudinal beam, a cross-section of the main energy absorption box is a rectangle, the side length of the rectangle along the z direction is greater than the side length along the y direction, and the four edges of the main energy absorption box are provided with main energy absorption box crush ribs; the cross-section of the auxiliary energy absorption box is a rectangle, the side length of the rectangle along the z direction is less than the side length along the y direction, and the four edges of the auxiliary energy absorption box are provided with auxiliary energy absorption box crush ribs, and the number of auxiliary energy absorption box crush ribs on the inner side edges is greater than the number of auxiliary energy absorption box crush ribs on the outer side edges.

[0010] The above-mentioned aluminum alloy automobile front anti-collision assembly with improved small offset collision protection performance has two main energy absorption box ribs symmetrically arranged in the main energy absorption box. The main energy absorption box ribs are composed of a middle straight rib section and two side oblique rib sections that are interconnected. The position and direction of the two side oblique rib sections and the longitudinal beam connecting ribs correspond.

[0011] The above-mentioned aluminum alloy automobile front anti-collision assembly with improved small offset collision protection performance has an auxiliary energy absorption box divided into three cavities by the auxiliary energy absorption box rib plate. There are two symmetrical auxiliary energy absorption box small cavities close to the outer end of the beam, and a larger auxiliary energy absorption box large cavity away from the outer end of the beam; one of the auxiliary energy absorption box rib plates corresponds to the position and direction of the vertical plate in the middle of the beam.

[0012] The above-mentioned aluminum alloy automobile front anti-collision assembly with improved small offset collision protection performance, the longitudinal beam rear mounting seat is composed of a longitudinal beam mounting sleeve and a rear mounting plate, the longitudinal beam mounting sleeve is provided with a positioning convex ridge that matches and engages with the guide ribs of the longitudinal beam, the rear end of the longitudinal beam is inserted into the longitudinal beam mounting sleeve and fastened by bolts; the rear mounting plate is provided with two mounting vertical plates, and a mounting plate reinforcement rib is provided between the rear mounting plate and the longitudinal beam mounting sleeve.

[0013] The aluminum alloy automobile front anti-collision assembly for improving the small offset collision protection performance has a crossbeam with a symmetrical bidirectional bending structure as a whole and a cut-angle structure at both ends of the crossbeam.

[0014] In the aluminum alloy automobile front anti-collision assembly for improving the small offset collision protection performance, the inner side edge of the front end mounting plate of the longitudinal beam is provided with a front end frame mounting position.

[0015] The aluminum alloy automobile front anti-collision assembly proposed in the present invention improves the anti-collision performance by considering the small offset collision process. On the one hand, it can ensure that the barrier can be blocked during the small offset collision process to ensure the normal deformation of the longitudinal beam; on the other hand, the aluminum alloy longitudinal beam section and the front and rear end mounting structures are proposed to ensure that the longitudinal beam is more uniform in crushing deformation and the cross-sectional force fluctuation is more stable. The main features of the present invention are reflected in the following aspects: 1. The structure of the longitudinal beam and the truncated cross-section of the aluminum alloy profile ensure that the aluminum alloy longitudinal beam has high bending resistance in the z and y directions, excellent crushing performance in the x direction, and stable force value. 2. The auxiliary energy absorption box structure is added to increase the contact area between the small offset collision and the barrier. The reasonable design of the main energy absorption box and the auxiliary energy absorption box structure also further enhances the collision stability of the system. 3. The front connecting plate of the longitudinal beam adopts the aluminum alloy die-casting process, innovatively connecting the anti-collision beam assembly, aluminum alloy longitudinal beam and upper side beam (shotgun) into a collision system, improving the overall connection stiffness and strength; when the car collides, the energy absorption box transmits the collision force to the longitudinal beam and upper side beam through the front mounting plate of the longitudinal beam, increasing the force transmission channel, and can also guide the lateral displacement of the car in the case of a small offset collision, avoiding the direct impact of the barrier on the A-pillar, and reducing the deformation of the passenger compartment. In addition, it also has the characteristics of reducing the number of parts, which is conducive to lightweighting and reducing the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 yes Figure 1 AA section diagram in;

[0019] Figure 3 , Figure 4 It is a structural schematic diagram of two different cross sections of the longitudinal beam;

[0020] Figure 5 yes Figure 1 BB section diagram in;

[0021] Figure 6 yes Figure 1 CC section diagram in;

[0022] Figure 7 It is a structural diagram of the longitudinal beam;

[0023] Figure 8 It is a schematic diagram of the structure of the mounting plate at the front end of the longitudinal beam;

[0024] Fig. 9 It is a structural schematic diagram of the anti-collision beam assembly;

[0025] Fig.10 It is a structural schematic diagram of the rear mounting seat of the longitudinal beam;

[0026] Fig.11 It is the force-displacement curve of the longitudinal beam of the present invention and the existing longitudinal beam.

[0027] The numbers in the figure are: 1, cross beam, 1-1, trimming structure, 1-2, middle vertical plate of cross beam, 2, main energy absorption box, 2-1, main energy absorption box collapse rib, 2-2, main energy absorption box rib plate, 3, auxiliary energy absorption box, 3-1, auxiliary energy absorption box collapse rib, 3-2, auxiliary energy absorption box small cavity, 3-3, auxiliary energy absorption box large cavity, 3-4, auxiliary energy absorption box rib plate, 4, longitudinal beam front end mounting plate, 4-1, longitudinal beam mounting block, 4-2, Upper side beam mounting block, 4-3, reinforcement plate, 4-4, reinforcement plate support rib, 4-5, front end frame mounting position, 5, longitudinal beam, 5-1, longitudinal beam collapse rib, 5-2, guide rib, 5-3, longitudinal beam truncated closed area, 5-4, longitudinal beam connecting rib plate, 6, longitudinal beam rear mounting seat, 6-1, longitudinal beam mounting sleeve, 6-2, rear mounting plate, 6-3, mounting plate reinforcement rib, 6-4, mounting vertical plate, 7, upper side beam. DETAILED DESCRIPTION

[0028] The present invention is a front anti-collision assembly for automobiles made of aluminum alloy, which is designed on the basis of fully considering the regulations on small offset collisions. On the one hand, the present invention solves the problem of vehicle body structure layout in small offset collisions. On the other hand, the longitudinal beam and anti-collision beam assembly system made of all-aluminum alloy material also has important value in terms of automobile lightweighting and energy conservation and emission reduction.

[0029] See also Figure 1 , Figure 7 The present invention comprises an anti-collision beam assembly, two symmetrically arranged longitudinal beams 5, two symmetrically arranged upper side beams 7 and two symmetrically arranged longitudinal beam front end mounting plates 4. The anti-collision beam assembly comprises a cross beam 1 and a symmetrically arranged main energy absorption box 2 and an auxiliary energy absorption box 3. The cross beam 1 is a symmetrical bidirectional bending structure as a whole. Considering the avoidance at both ends of the cross beam, a cut-angle structure 1-1 is adopted. The cross beam is provided with a cross beam middle vertical plate 1-2 to improve its strength.

[0030] See also Figure 1 , Figure 6 The present invention designs a longitudinal beam front end mounting plate 4, and the front end surface of the longitudinal beam front end mounting plate is provided with main and auxiliary energy absorption box mounting positions, and the rear end surface of the beam front end mounting plate sets the longitudinal beam mounting position and the upper side beam mounting position side by side. By designing the longitudinal beam front end mounting plate, the anti-collision beam assembly, the longitudinal beam and the upper side beam (shotgun) can be connected as a whole, and prefabricated with the front end frame mounting position 4-5, further increasing the function of the part. The longitudinal beam front end mounting plate adopts an aluminum alloy die-casting process, which perfectly integrates the above connection functions into one part, reduces the number of parts, and achieves the purpose of lightweight. The longitudinal beam front end mounting plate is a rectangular plate with a frame, and the front end surface of the longitudinal beam front end mounting plate sets the main energy absorption box mounting position and the auxiliary energy absorption box mounting position side by side from the inside to the outside; the rear end surface of the longitudinal beam front end mounting plate sets the longitudinal beam mounting position, the reinforcement plate 4-3 and the upper side beam mounting position side by side from the inside to the outside. The longitudinal beam mounting position is provided with four longitudinal beam mounting blocks 4-1 connected to the four sides of the longitudinal beam, and the upper side beam mounting position is provided with three upper side beam mounting blocks 4-2 connected to the front, rear and outer sides of the upper side beam. Both the longitudinal beam mounting blocks and the upper side beam mounting blocks are provided with bolt holes for easy connection. A reinforcing plate support rib 4-4 is provided on the side of the reinforcing plate close to the upper side beam mounting position. The reinforcing plate improves the connection stiffness and strength of the longitudinal beam front end mounting plate. The front part of the longitudinal beam is connected to the longitudinal beam front end mounting plate. When a small offset collision occurs, the anti-collision beam assembly is first crushed and deformed, and the main and auxiliary energy absorption boxes transmit the collision force to the longitudinal beam front end mounting plate, and then to the longitudinal beam and the upper side beam part, increasing the force transmission channels and better absorbing the collision energy. On the other hand, this spatial arrangement is conducive to the upper side beam guiding the lateral displacement of the vehicle when the offset is small, avoiding the barrier from directly hitting the A-pillar and reducing the deformation of the passenger compartment.

[0031] See also Figure 1-Figure 4 and Figure 7 At least one longitudinal beam collapse rib 5-1 is distributed along the y direction at the front of the longitudinal beam 5, the purpose of which is to reduce the initial peak value of the longitudinal beam cross-sectional force during collision and reduce the instantaneous acceleration of collision. A mounting hole is provided at the front end of the longitudinal beam. The upper and lower surfaces of the rear part of the longitudinal beam are respectively provided with guide ribs 5-2, and the rear end of the longitudinal beam is provided with a longitudinal beam rear mounting seat 6. The truncated outer wall portion of the longitudinal beam is a regular polygon, and the illustrated embodiment is an octagon. A longitudinal beam truncated closed area 5-3 and several longitudinal beam connecting ribs 5-4 are distributed in the polygon. The longitudinal beam truncated closed area is located at the center of the polygon. The longitudinal beam truncated closed area can be circular or polygonal. Each longitudinal beam connecting rib connects the longitudinal beam truncated closed area to the outer wall of the longitudinal beam. The longitudinal beam truncated closed area and the longitudinal beam connecting ribs divide the longitudinal beam into a multi-cavity structure, and the illustrated embodiment is a five-cavity structure. The longitudinal beam section design not only has strong y-direction and z-direction bending strength, but also has good collision crushing performance. Compared with other cross-sections of aluminum alloy longitudinal beams, the cross-section force fluctuation range is smaller and the force value is more stable. Fig.11shown.

[0032] See also Figure 1 and Fig. 9 The anti-collision beam assembly of the present invention is provided with a main and a secondary energy absorption box, and the secondary energy absorption box 3 is located on the outside of the main energy absorption box 2. The cross section of the main energy absorption box 2 is a rectangle, and the side length of the rectangle along the z direction (the vertical direction in the use state) is greater than the side length along the y direction (the left and right direction in the use state), and the four edges of the main energy absorption box are provided with main energy absorption box crushing ribs 2-1. The cross section of the secondary energy absorption box 3 is a rectangle, and the side length of the rectangle along the z direction is less than the side length along the y direction. The four edges of the secondary energy absorption box are provided with secondary energy absorption box crushing ribs 3-1, and the number of the secondary energy absorption box crushing ribs on the inner side edges is greater than the number of the secondary energy absorption box crushing ribs on the outer side edges, which is beneficial to guide the secondary energy absorption box to be more evenly crushed and deformed during a small offset collision, and at the same time reduce the y-direction component force generated during the collision. Energy absorption box mounting plates are provided at the rear of the main and secondary energy absorption boxes, and the energy absorption box mounting plates are bolted to the mounting plate at the front end of the longitudinal beam.

[0033] See also Figure 1 and Figure 5 , Figure 6 Two main energy absorption box ribs 2-2 are symmetrically arranged in the main energy absorption box 2. The main energy absorption box ribs are composed of a middle straight rib section and two side oblique rib sections that are interconnected. The two side oblique rib sections correspond to the position and direction of the longitudinal beam connecting ribs 5-4. The above structure can ensure the transmission of collision force and reduce the instability and deformation of the energy absorption box. The auxiliary energy absorption box 3 is divided into three cavities by the auxiliary energy absorption box ribs. There are two symmetrical auxiliary energy absorption box small cavities 3-2 near the outer end of the beam. This part of the energy absorption box has a large rigidity and is not easy to deform. There is a larger auxiliary energy absorption box large cavity 3-3 away from the outer end of the beam. This part of the energy absorption box has a small rigidity and is easy to crush and deform. An auxiliary energy absorption box rib 3-4 connecting the outer wall of the auxiliary energy absorption box corresponds to the position and direction of the middle vertical plate 1-2 of the beam and plays a supporting role.

[0034] See also Figure 1 , Fig.10 The longitudinal beam rear mounting seat 6 is composed of a longitudinal beam mounting sleeve 6-1 and a rear mounting plate 6-2. The longitudinal beam mounting sleeve is provided with a positioning convex ridge that matches and engages with the guide rib of the longitudinal beam. The rear end of the longitudinal beam is inserted into the longitudinal beam mounting sleeve and fastened by bolts. The rear mounting plate is provided with two mounting vertical plates 6-4. A mounting plate reinforcing rib 6-3 is provided between the rear mounting plate and the longitudinal beam mounting sleeve. On the one hand, the longitudinal beam rear mounting seat connects the rear part of the longitudinal beam to it, which strengthens the rear end of the longitudinal beam and prevents the rear end of the longitudinal beam from being crushed and deformed during a collision. On the other hand, the rear mounting plate is connected to the rear firewall of the engine compartment to ensure the rigidity and strength of the overall system.

[0035] In summary, the present invention solves the problem of the vehicle body structure layout in small offset collisions, improves the stiffness of the entire front collision avoidance system, ensures collision stability, reduces the number of processed parts, and also has great value in lightweighting.

Claims

1. An aluminum alloy automobile front anti-collision assembly for improving small offset collision protection performance, characterized in that: The anti-collision beam assembly comprises a longitudinal beam (5), an upper side beam, and a longitudinal beam front end mounting plate (4). The anti-collision beam assembly comprises a cross beam (1) and an energy absorption box. The energy absorption box is symmetrically arranged relative to the center of the cross beam. The front end surface of the longitudinal beam front end mounting plate is connected to the energy absorption box. The rear end surface of the longitudinal beam front end mounting plate is connected to the longitudinal beam and the upper side beam. The longitudinal beam front end mounting plate connects the main and auxiliary energy absorption boxes, the longitudinal beam, and the upper side beam into one. The truncated outer wall of the longitudinal beam is a regular polygon, and a longitudinal beam truncated closed area (5-3) and a plurality of longitudinal beam connecting ribs (5-4) are distributed in the polygon. The longitudinal beam truncated closed area is located at the center of the polygon, and each longitudinal beam connecting rib connects the longitudinal beam truncated closed area to the outer wall. The longitudinal beam truncated closed area and the longitudinal beam connecting rib divide the longitudinal beam into a multi-cavity structure. At least one longitudinal beam collapse rib (5-1) is distributed along the y direction at the front of the longitudinal beam, guide ribs (5-2) are respectively arranged on the upper and lower surfaces of the rear of the longitudinal beam, and a longitudinal beam rear mounting seat is arranged at the rear end of the longitudinal beam; The longitudinal beam rear mounting seat (6) is composed of a longitudinal beam mounting sleeve (6-1) and a rear mounting plate (6-2); the longitudinal beam mounting sleeve is provided with a positioning convex ridge that matches and engages with the guide ribs of the longitudinal beam; the rear end of the longitudinal beam is inserted into the longitudinal beam mounting sleeve and fastened by bolts; the rear mounting plate is provided with two mounting vertical plates (6-4); and mounting plate reinforcing ribs (6-3) are provided between the rear mounting plate and the longitudinal beam mounting sleeve.

2. The aluminum alloy automobile front anti-collision assembly for improving small offset collision protection performance according to claim 1 is characterized in that: The energy absorption box is composed of a main energy absorption box (2) and an auxiliary energy absorption box (3), wherein the auxiliary energy absorption box (3) is located outside the main energy absorption box; the longitudinal beam front end mounting plate is a rectangular plate provided with a frame, and the front end surface of the longitudinal beam front end mounting plate is provided with a main energy absorption box mounting position and an auxiliary energy absorption box mounting position side by side from the inside to the outside; the rear end surface of the longitudinal beam front end mounting plate is provided with a longitudinal beam mounting position, a reinforcing plate (4-3) and an upper side beam mounting position side by side from the inside to the outside, the longitudinal beam mounting position is provided with four longitudinal beam mounting blocks (4-1) connected to the four sides of the longitudinal beam, the upper side beam mounting position is provided with three upper side beam mounting blocks (4-2) connected to the front, rear and outer side surfaces of the upper side beam, and a reinforcing plate support rib (4-4) is provided on the side of the reinforcing plate close to the upper side beam mounting position.

3. The aluminum alloy automobile front anti-collision assembly for improving small offset collision protection performance according to claim 1 is characterized in that: The main energy absorption box (2) corresponds to the position of the longitudinal beam, the cross section of the main energy absorption box is a rectangle, the side length of the rectangle along the z direction is greater than the side length along the y direction, and the four edges of the main energy absorption box are provided with main energy absorption box crushing ribs (2-1); the cross section of the auxiliary energy absorption box (3) is a rectangle, the side length of the rectangle along the z direction is less than the side length along the y direction, and the four edges of the auxiliary energy absorption box are provided with auxiliary energy absorption box crushing ribs (3-1), and the number of auxiliary energy absorption box crushing ribs on the inner side edge is greater than the number of auxiliary energy absorption box crushing ribs on the outer side edge.

4. The aluminum alloy automobile front anti-collision assembly for improving small offset collision protection performance according to claim 1 is characterized in that: Two main energy absorption box ribs (2-2) are symmetrically arranged in the main energy absorption box. The main energy absorption box ribs are composed of a middle straight rib section and two side oblique rib sections connected to each other. The positions and directions of the two side oblique rib sections correspond to those of the longitudinal beam connection ribs (5-4).

5. The aluminum alloy automobile front anti-collision assembly for improving small offset collision protection performance according to claim 1 is characterized in that: The auxiliary energy absorption box is divided into three cavities by the auxiliary energy absorption box ribs, two symmetrical auxiliary energy absorption box small cavities (3-2) are close to the outer end of the cross beam, and a larger auxiliary energy absorption box large cavity (3-3) is far away from the outer end of the cross beam; one of the auxiliary energy absorption box ribs (3-4) corresponds to the position and direction of the middle vertical plate (1-2) of the cross beam.

6. The aluminum alloy automobile front anti-collision assembly for improving small offset collision protection performance according to claim 1 is characterized in that: The entire crossbeam (1) is a symmetrical bidirectional curved structure, and both ends of the crossbeam adopt a cut-angle structure (1-1).

7. The aluminum alloy automobile front anti-collision assembly for improving small offset collision protection performance according to claim 1 is characterized in that: The inner side edge of the front end mounting plate of the longitudinal beam is provided with a front end frame mounting position (4-5).

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